Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
Free Software Foundation, Inc.
Written by Linus Nordberg, Swox AB <info@swox.com>,
based on elf32-ppc.c by Ian Lance Taylor.
Largely rewritten by Alan Modra <amodra@bigpond.net.au>
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/ppc64.h"
#include "elf64-ppc.h"
static bfd_reloc_status_type ppc64_elf_ha_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_branch_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_brtaken_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_sectoff_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_toc_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_toc64_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc64_elf_unhandled_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_vma opd_entry_value
(asection *, bfd_vma, asection **, bfd_vma *);
#define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
#define TARGET_LITTLE_NAME "elf64-powerpcle"
#define TARGET_BIG_SYM bfd_elf64_powerpc_vec
#define TARGET_BIG_NAME "elf64-powerpc"
#define ELF_ARCH bfd_arch_powerpc
#define ELF_MACHINE_CODE EM_PPC64
#define ELF_MAXPAGESIZE 0x10000
#define elf_info_to_howto ppc64_elf_info_to_howto
#define elf_backend_want_got_sym 0
#define elf_backend_want_plt_sym 0
#define elf_backend_plt_alignment 3
#define elf_backend_plt_not_loaded 1
#define elf_backend_got_header_size 8
#define elf_backend_can_gc_sections 1
#define elf_backend_can_refcount 1
#define elf_backend_rela_normal 1
#define bfd_elf64_mkobject ppc64_elf_mkobject
#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
#define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
#define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
#define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
#define elf_backend_object_p ppc64_elf_object_p
#define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
#define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
#define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
#define elf_backend_check_directives ppc64_elf_check_directives
#define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
#define elf_backend_check_relocs ppc64_elf_check_relocs
#define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
#define elf_backend_hide_symbol ppc64_elf_hide_symbol
#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
#define elf_backend_action_discarded ppc64_elf_action_discarded
#define elf_backend_relocate_section ppc64_elf_relocate_section
#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
#define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
#define elf_backend_special_sections ppc64_elf_special_sections
section. */
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
#define PLT_ENTRY_SIZE 24
#define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
#define TOC_BASE_OFF 0x8000
#define TP_OFFSET 0x7000
#define DTP_OFFSET 0x8000
sometimes the .plt entry crosses a 64k boundary and we need to
insert an addis to adjust r12. */
#define PLT_CALL_STUB_SIZE (7*4)
#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
#define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
#define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
#define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
#define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
#define BCTR 0x4e800420 /* bctr */
#define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
#define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
#define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
address of glink entry in CTR. From that, we can calculate PLT0. */
#define GLINK_CALL_STUB_SIZE (16*4)
#define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
#define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
#define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
#define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
#define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
#define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
#define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
#define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
#define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
#define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
#define NOP 0x60000000
#define CROR_151515 0x4def7b82
#define CROR_313131 0x4ffffb82
#define LI_R0_0 0x38000000 /* li %r0,0 */
#define B_DOT 0x48000000 /* b . */
a branch. */
#define LIS_R0_0 0x3c000000 /* lis %r0,0 */
#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
#define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
#define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
#define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
#define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
#define LI_R12_0 0x39800000 /* li %r12,0 */
#define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
#define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
#define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
#define BLR 0x4e800020 /* blr */
with identical R_PPC64_RELATIVE relocs, there is really no need to
propagate .opd relocs; The dynamic linker should be taught to
relocate .opd without reloc entries. */
#ifndef NO_OPD_RELOCS
#define NO_OPD_RELOCS 0
#endif
#define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
static reloc_howto_type ppc64_elf_howto_raw[] = {
HOWTO (R_PPC64_NONE,
0,
2,
32,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC64_NONE",
FALSE,
0,
0,
FALSE),
HOWTO (R_PPC64_ADDR32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC64_ADDR32",
FALSE,
0,
0xffffffff,
FALSE),
FIXME: we don't check that, we just clear them. */
HOWTO (R_PPC64_ADDR24,
0,
2,
26,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC64_ADDR24",
FALSE,
0,
0x03fffffc,
FALSE),
HOWTO (R_PPC64_ADDR16,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC64_ADDR16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_ADDR16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC64_ADDR16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_ADDR16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC64_ADDR16_HI",
FALSE,
0,
0xffff,
FALSE),
bits, treated as a signed number, is negative. */
HOWTO (R_PPC64_ADDR16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_ha_reloc,
"R_PPC64_ADDR16_HA",
FALSE,
0,
0xffff,
FALSE),
FIXME: we don't check that, we just clear them. */
HOWTO (R_PPC64_ADDR14,
0,
2,
16,
FALSE,
0,
complain_overflow_bitfield,
ppc64_elf_branch_reloc,
"R_PPC64_ADDR14",
FALSE,
0,
0x0000fffc,
FALSE),
indicate that the branch is expected to be taken. The lower two
bits must be zero. */
HOWTO (R_PPC64_ADDR14_BRTAKEN,
0,
2,
16,
FALSE,
0,
complain_overflow_bitfield,
ppc64_elf_brtaken_reloc,
"R_PPC64_ADDR14_BRTAKEN",
FALSE,
0,
0x0000fffc,
FALSE),
indicate that the branch is not expected to be taken. The lower
two bits must be zero. */
HOWTO (R_PPC64_ADDR14_BRNTAKEN,
0,
2,
16,
FALSE,
0,
complain_overflow_bitfield,
ppc64_elf_brtaken_reloc,
"R_PPC64_ADDR14_BRNTAKEN",
FALSE,
0,
0x0000fffc,
FALSE),
HOWTO (R_PPC64_REL24,
0,
2,
26,
TRUE,
0,
complain_overflow_signed,
ppc64_elf_branch_reloc,
"R_PPC64_REL24",
FALSE,
0,
0x03fffffc,
TRUE),
HOWTO (R_PPC64_REL14,
0,
2,
16,
TRUE,
0,
complain_overflow_signed,
ppc64_elf_branch_reloc,
"R_PPC64_REL14",
FALSE,
0,
0x0000fffc,
TRUE),
the branch is expected to be taken. The lower two bits must be
zero. */
HOWTO (R_PPC64_REL14_BRTAKEN,
0,
2,
16,
TRUE,
0,
complain_overflow_signed,
ppc64_elf_brtaken_reloc,
"R_PPC64_REL14_BRTAKEN",
FALSE,
0,
0x0000fffc,
TRUE),
the branch is not expected to be taken. The lower two bits must
be zero. */
HOWTO (R_PPC64_REL14_BRNTAKEN,
0,
2,
16,
TRUE,
0,
complain_overflow_signed,
ppc64_elf_brtaken_reloc,
"R_PPC64_REL14_BRNTAKEN",
FALSE,
0,
0x0000fffc,
TRUE),
symbol. */
HOWTO (R_PPC64_GOT16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT16",
FALSE,
0,
0xffff,
FALSE),
the symbol. */
HOWTO (R_PPC64_GOT16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT16_LO",
FALSE,
0,
0xffff,
FALSE),
the symbol. */
HOWTO (R_PPC64_GOT16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT16_HI",
FALSE,
0,
0xffff,
FALSE),
the symbol. */
HOWTO (R_PPC64_GOT16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT16_HA",
FALSE,
0,
0xffff,
FALSE),
both in the object being run and in some shared library. The
dynamic linker copies the data addressed by the symbol from the
shared library into the object, because the object being
run has to have the data at some particular address. */
HOWTO (R_PPC64_COPY,
0,
0,
0,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_COPY",
FALSE,
0,
0,
FALSE),
entries. */
HOWTO (R_PPC64_GLOB_DAT,
0,
4,
64,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GLOB_DAT",
FALSE,
0,
ONES (64),
FALSE),
entry for a symbol. */
HOWTO (R_PPC64_JMP_SLOT,
0,
0,
0,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_JMP_SLOT",
FALSE,
0,
0,
FALSE),
doubleword64 is set to the load address of the object, plus the
addend. */
HOWTO (R_PPC64_RELATIVE,
0,
4,
64,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC64_RELATIVE",
FALSE,
0,
ONES (64),
FALSE),
HOWTO (R_PPC64_UADDR32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC64_UADDR32",
FALSE,
0,
0xffffffff,
FALSE),
HOWTO (R_PPC64_UADDR16,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC64_UADDR16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_REL32,
0,
2,
32,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC64_REL32",
FALSE,
0,
0xffffffff,
TRUE),
HOWTO (R_PPC64_PLT32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
ppc64_elf_unhandled_reloc,
"R_PPC64_PLT32",
FALSE,
0,
0xffffffff,
FALSE),
FIXME: R_PPC64_PLTREL32 not supported. */
HOWTO (R_PPC64_PLTREL32,
0,
2,
32,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC64_PLTREL32",
FALSE,
0,
0xffffffff,
TRUE),
the symbol. */
HOWTO (R_PPC64_PLT16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_PLT16_LO",
FALSE,
0,
0xffff,
FALSE),
the symbol. */
HOWTO (R_PPC64_PLT16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_PLT16_HI",
FALSE,
0,
0xffff,
FALSE),
the symbol. */
HOWTO (R_PPC64_PLT16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_PLT16_HA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_SECTOFF,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
ppc64_elf_sectoff_reloc,
"R_PPC64_SECTOFF",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_SECTOFF_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_sectoff_reloc,
"R_PPC64_SECTOFF_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_SECTOFF_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_sectoff_reloc,
"R_PPC64_SECTOFF_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_SECTOFF_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_sectoff_ha_reloc,
"R_PPC64_SECTOFF_HA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_REL30,
2,
2,
30,
TRUE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC64_REL30",
FALSE,
0,
0xfffffffc,
TRUE),
HOWTO (R_PPC64_ADDR64,
0,
4,
64,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC64_ADDR64",
FALSE,
0,
ONES (64),
FALSE),
HOWTO (R_PPC64_ADDR16_HIGHER,
32,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC64_ADDR16_HIGHER",
FALSE,
0,
0xffff,
FALSE),
16 bits, treated as a signed number, is negative. */
HOWTO (R_PPC64_ADDR16_HIGHERA,
32,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_ha_reloc,
"R_PPC64_ADDR16_HIGHERA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_ADDR16_HIGHEST,
48,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC64_ADDR16_HIGHEST",
FALSE,
0,
0xffff,
FALSE),
16 bits, treated as a signed number, is negative. */
HOWTO (R_PPC64_ADDR16_HIGHESTA,
48,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_ha_reloc,
"R_PPC64_ADDR16_HIGHESTA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_UADDR64,
0,
4,
64,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC64_UADDR64",
FALSE,
0,
ONES (64),
FALSE),
HOWTO (R_PPC64_REL64,
0,
4,
64,
TRUE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC64_REL64",
FALSE,
0,
ONES (64),
TRUE),
HOWTO (R_PPC64_PLT64,
0,
4,
64,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_PLT64",
FALSE,
0,
ONES (64),
FALSE),
table. */
HOWTO (R_PPC64_PLTREL64,
0,
4,
64,
TRUE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_PLTREL64",
FALSE,
0,
ONES (64),
TRUE),
HOWTO (R_PPC64_TOC16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_toc_reloc,
"R_PPC64_TOC16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_TOC16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_toc_reloc,
"R_PPC64_TOC16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_TOC16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_toc_reloc,
"R_PPC64_TOC16_HI",
FALSE,
0,
0xffff,
FALSE),
contents of the low 16 bits, treated as a signed number, is
negative. */
HOWTO (R_PPC64_TOC16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_toc_ha_reloc,
"R_PPC64_TOC16_HA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_TOC,
0,
4,
64,
FALSE,
0,
complain_overflow_bitfield,
ppc64_elf_toc64_reloc,
"R_PPC64_TOC",
FALSE,
0,
ONES (64),
FALSE),
value to relocate may (!) refer to a PLT entry which the link
editor (a) may replace with the symbol value. If the link editor
is unable to fully resolve the symbol, it may (b) create a PLT
entry and store the address to the new PLT entry in the GOT.
This permits lazy resolution of function symbols at run time.
The link editor may also skip all of this and just (c) emit a
R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
HOWTO (R_PPC64_PLTGOT16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_unhandled_reloc,
"R_PPC64_PLTGOT16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_PLTGOT16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_PLTGOT16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_PLTGOT16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_PLTGOT16_HI",
FALSE,
0,
0xffff,
FALSE),
1 if the contents of the low 16 bits, treated as a signed number,
is negative. */
HOWTO (R_PPC64_PLTGOT16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_PLTGOT16_HA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_ADDR16_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC64_ADDR16_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_ADDR16_LO_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC64_ADDR16_LO_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_GOT16_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT16_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_GOT16_LO_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT16_LO_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_PLT16_LO_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_PLT16_LO_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_SECTOFF_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
ppc64_elf_sectoff_reloc,
"R_PPC64_SECTOFF_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_SECTOFF_LO_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_sectoff_reloc,
"R_PPC64_SECTOFF_LO_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_TOC16_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_toc_reloc,
"R_PPC64_TOC16_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_TOC16_LO_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_toc_reloc,
"R_PPC64_TOC16_LO_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_PLTGOT16_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_unhandled_reloc,
"R_PPC64_PLTGOT16_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_PLTGOT16_LO_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_PLTGOT16_LO_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_TLS,
0,
2,
32,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC64_TLS",
FALSE,
0,
0,
FALSE),
definition of its TLS sym. */
HOWTO (R_PPC64_DTPMOD64,
0,
4,
64,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_DTPMOD64",
FALSE,
0,
ONES (64),
FALSE),
of sym+add and the base address of the thread-local storage block that
contains the definition of sym, minus 0x8000. */
HOWTO (R_PPC64_DTPREL64,
0,
4,
64,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_DTPREL64",
FALSE,
0,
ONES (64),
FALSE),
HOWTO (R_PPC64_DTPREL16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_unhandled_reloc,
"R_PPC64_DTPREL16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_DTPREL16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_DTPREL16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_DTPREL16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_DTPREL16_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_DTPREL16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_DTPREL16_HA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_DTPREL16_HIGHER,
32,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_DTPREL16_HIGHER",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_DTPREL16_HIGHERA,
32,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_DTPREL16_HIGHERA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_DTPREL16_HIGHEST,
48,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_DTPREL16_HIGHEST",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_DTPREL16_HIGHESTA,
48,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_DTPREL16_HIGHESTA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_DTPREL16_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_unhandled_reloc,
"R_PPC64_DTPREL16_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_DTPREL16_LO_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_DTPREL16_LO_DS",
FALSE,
0,
0xfffc,
FALSE),
sym+add and the value of the thread pointer (r13). */
HOWTO (R_PPC64_TPREL64,
0,
4,
64,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_TPREL64",
FALSE,
0,
ONES (64),
FALSE),
HOWTO (R_PPC64_TPREL16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_unhandled_reloc,
"R_PPC64_TPREL16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_TPREL16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_TPREL16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_TPREL16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_TPREL16_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_TPREL16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_TPREL16_HA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_TPREL16_HIGHER,
32,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_TPREL16_HIGHER",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_TPREL16_HIGHERA,
32,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_TPREL16_HIGHERA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_TPREL16_HIGHEST,
48,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_TPREL16_HIGHEST",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_TPREL16_HIGHESTA,
48,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_TPREL16_HIGHESTA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_TPREL16_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_unhandled_reloc,
"R_PPC64_TPREL16_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_TPREL16_LO_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_TPREL16_LO_DS",
FALSE,
0,
0xfffc,
FALSE),
with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
to the first entry relative to the TOC base (r2). */
HOWTO (R_PPC64_GOT_TLSGD16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_TLSGD16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_GOT_TLSGD16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_TLSGD16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_GOT_TLSGD16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_TLSGD16_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_GOT_TLSGD16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_TLSGD16_HA",
FALSE,
0,
0xffff,
FALSE),
with values (sym+add)@dtpmod and zero, and computes the offset to the
first entry relative to the TOC base (r2). */
HOWTO (R_PPC64_GOT_TLSLD16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_TLSLD16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_GOT_TLSLD16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_TLSLD16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_GOT_TLSLD16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_TLSLD16_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_GOT_TLSLD16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_TLSLD16_HA",
FALSE,
0,
0xffff,
FALSE),
the offset to the entry relative to the TOC base (r2). */
HOWTO (R_PPC64_GOT_DTPREL16_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_DTPREL16_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_DTPREL16_LO_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_GOT_DTPREL16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_DTPREL16_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_GOT_DTPREL16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_DTPREL16_HA",
FALSE,
0,
0xffff,
FALSE),
offset to the entry relative to the TOC base (r2). */
HOWTO (R_PPC64_GOT_TPREL16_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_TPREL16_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_TPREL16_LO_DS",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC64_GOT_TPREL16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_TPREL16_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_GOT_TPREL16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc64_elf_unhandled_reloc,
"R_PPC64_GOT_TPREL16_HA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC64_GNU_VTINHERIT,
0,
0,
0,
FALSE,
0,
complain_overflow_dont,
NULL,
"R_PPC64_GNU_VTINHERIT",
FALSE,
0,
0,
FALSE),
HOWTO (R_PPC64_GNU_VTENTRY,
0,
0,
0,
FALSE,
0,
complain_overflow_dont,
NULL,
"R_PPC64_GNU_VTENTRY",
FALSE,
0,
0,
FALSE),
};
be done. */
static void
ppc_howto_init (void)
{
unsigned int i, type;
for (i = 0;
i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
i++)
{
type = ppc64_elf_howto_raw[i].type;
BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
/ sizeof (ppc64_elf_howto_table[0])));
ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
}
}
static reloc_howto_type *
ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
enum elf_ppc64_reloc_type r = R_PPC64_NONE;
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
ppc_howto_init ();
switch (code)
{
default:
return NULL;
case BFD_RELOC_NONE: r = R_PPC64_NONE;
break;
case BFD_RELOC_32: r = R_PPC64_ADDR32;
break;
case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
break;
case BFD_RELOC_16: r = R_PPC64_ADDR16;
break;
case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
break;
case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
break;
case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
break;
case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
break;
case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
break;
case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
break;
case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
break;
case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
break;
case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
break;
case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
break;
case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
break;
case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
break;
case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
break;
case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
break;
case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
break;
case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
break;
case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
break;
case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
break;
case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
break;
case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
break;
case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
break;
case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
break;
case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
break;
case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
break;
case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
break;
case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
break;
case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
break;
case BFD_RELOC_64: r = R_PPC64_ADDR64;
break;
case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
break;
case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
break;
case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
break;
case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
break;
case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
break;
case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
break;
case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
break;
case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
break;
case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
break;
case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
break;
case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
break;
case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
break;
case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
break;
case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
break;
case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
break;
case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
break;
case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
break;
case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
break;
case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
break;
case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
break;
case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
break;
case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
break;
case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
break;
case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
break;
case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
break;
case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
break;
case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
break;
case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
break;
case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
break;
case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
break;
case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
break;
case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
break;
case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
break;
case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
break;
case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
break;
case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
break;
case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
break;
case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
break;
case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
break;
case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
break;
case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
break;
case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
break;
case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
break;
case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
break;
case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
break;
case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
break;
case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
break;
case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
break;
case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
break;
case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
break;
case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
break;
case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
break;
case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
break;
case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
break;
case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
break;
case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
break;
case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
break;
case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
break;
case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
break;
case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
break;
case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
break;
case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
break;
case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
break;
case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
break;
case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
break;
case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
break;
case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
break;
case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
break;
case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
break;
}
return ppc64_elf_howto_table[r];
};
static void
ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
unsigned int type;
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
ppc_howto_init ();
type = ELF64_R_TYPE (dst->r_info);
if (type >= (sizeof (ppc64_elf_howto_table)
/ sizeof (ppc64_elf_howto_table[0])))
{
(*_bfd_error_handler) (_("%B: invalid relocation type %d"),
abfd, (int) type);
type = R_PPC64_NONE;
}
cache_ptr->howto = ppc64_elf_howto_table[type];
}
static bfd_reloc_status_type
ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
void *data, asection *input_section,
bfd *output_bfd, char **error_message)
{
call the generic function. Any adjustment will be done at final
link time. */
if (output_bfd != NULL)
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
input_section, output_bfd, error_message);
We won't actually be using the low 16 bits, so trashing them
doesn't matter. */
reloc_entry->addend += 0x8000;
return bfd_reloc_continue;
}
static bfd_reloc_status_type
ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
void *data, asection *input_section,
bfd *output_bfd, char **error_message)
{
if (output_bfd != NULL)
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
input_section, output_bfd, error_message);
if (strcmp (symbol->section->name, ".opd") == 0
&& (symbol->section->owner->flags & DYNAMIC) == 0)
{
bfd_vma dest = opd_entry_value (symbol->section,
symbol->value + reloc_entry->addend,
NULL, NULL);
if (dest != (bfd_vma) -1)
reloc_entry->addend = dest - (symbol->value
+ symbol->section->output_section->vma
+ symbol->section->output_offset);
}
return bfd_reloc_continue;
}
static bfd_reloc_status_type
ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
void *data, asection *input_section,
bfd *output_bfd, char **error_message)
{
long insn;
enum elf_ppc64_reloc_type r_type;
bfd_size_type octets;
bfd_boolean is_power4 = FALSE;
call the generic function. Any adjustment will be done at final
link time. */
if (output_bfd != NULL)
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
input_section, output_bfd, error_message);
octets = reloc_entry->address * bfd_octets_per_byte (abfd);
insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
insn &= ~(0x01 << 21);
r_type = reloc_entry->howto->type;
if (r_type == R_PPC64_ADDR14_BRTAKEN
|| r_type == R_PPC64_REL14_BRTAKEN)
insn |= 0x01 << 21;
if (is_power4)
{
on CR(BI) insns (BO == 001at or 011at), and 0b01000
for branch on CTR insns (BO == 1a00t or 1a01t). */
if ((insn & (0x14 << 21)) == (0x04 << 21))
insn |= 0x02 << 21;
else if ((insn & (0x14 << 21)) == (0x10 << 21))
insn |= 0x08 << 21;
else
goto out;
}
else
{
bfd_vma target = 0;
bfd_vma from;
if (!bfd_is_com_section (symbol->section))
target = symbol->value;
target += symbol->section->output_section->vma;
target += symbol->section->output_offset;
target += reloc_entry->addend;
from = (reloc_entry->address
+ input_section->output_offset
+ input_section->output_section->vma);
if ((bfd_signed_vma) (target - from) < 0)
insn ^= 0x01 << 21;
}
bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
out:
return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
input_section, output_bfd, error_message);
}
static bfd_reloc_status_type
ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
void *data, asection *input_section,
bfd *output_bfd, char **error_message)
{
call the generic function. Any adjustment will be done at final
link time. */
if (output_bfd != NULL)
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
input_section, output_bfd, error_message);
reloc_entry->addend -= symbol->section->output_section->vma;
return bfd_reloc_continue;
}
static bfd_reloc_status_type
ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
void *data, asection *input_section,
bfd *output_bfd, char **error_message)
{
call the generic function. Any adjustment will be done at final
link time. */
if (output_bfd != NULL)
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
input_section, output_bfd, error_message);
reloc_entry->addend -= symbol->section->output_section->vma;
reloc_entry->addend += 0x8000;
return bfd_reloc_continue;
}
static bfd_reloc_status_type
ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
void *data, asection *input_section,
bfd *output_bfd, char **error_message)
{
bfd_vma TOCstart;
call the generic function. Any adjustment will be done at final
link time. */
if (output_bfd != NULL)
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
input_section, output_bfd, error_message);
TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
if (TOCstart == 0)
TOCstart = ppc64_elf_toc (input_section->output_section->owner);
reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
return bfd_reloc_continue;
}
static bfd_reloc_status_type
ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
void *data, asection *input_section,
bfd *output_bfd, char **error_message)
{
bfd_vma TOCstart;
call the generic function. Any adjustment will be done at final
link time. */
if (output_bfd != NULL)
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
input_section, output_bfd, error_message);
TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
if (TOCstart == 0)
TOCstart = ppc64_elf_toc (input_section->output_section->owner);
reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
reloc_entry->addend += 0x8000;
return bfd_reloc_continue;
}
static bfd_reloc_status_type
ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
void *data, asection *input_section,
bfd *output_bfd, char **error_message)
{
bfd_vma TOCstart;
bfd_size_type octets;
call the generic function. Any adjustment will be done at final
link time. */
if (output_bfd != NULL)
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
input_section, output_bfd, error_message);
TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
if (TOCstart == 0)
TOCstart = ppc64_elf_toc (input_section->output_section->owner);
octets = reloc_entry->address * bfd_octets_per_byte (abfd);
bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
return bfd_reloc_ok;
}
static bfd_reloc_status_type
ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
void *data, asection *input_section,
bfd *output_bfd, char **error_message)
{
call the generic function. Any adjustment will be done at final
link time. */
if (output_bfd != NULL)
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
input_section, output_bfd, error_message);
if (error_message != NULL)
{
static char buf[60];
sprintf (buf, "generic linker can't handle %s",
reloc_entry->howto->name);
*error_message = buf;
}
return bfd_reloc_dangerous;
}
struct ppc64_elf_obj_tdata
{
struct elf_obj_tdata elf;
asection *got;
asection *relgot;
union {
on removed .opd entries to this section so that the sym is removed. */
asection *deleted_section;
bfd_boolean has_dotsym;
} u;
sections means we potentially need one of these for each input bfd. */
union {
bfd_signed_vma refcount;
bfd_vma offset;
} tlsld_got;
Elf_Internal_Rela *opd_relocs;
};
#define ppc64_elf_tdata(bfd) \
((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
#define ppc64_tlsld_got(bfd) \
(&ppc64_elf_tdata (bfd)->tlsld_got)
static bfd_boolean
ppc64_elf_mkobject (bfd *abfd)
{
bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
abfd->tdata.any = bfd_zalloc (abfd, amt);
if (abfd->tdata.any == NULL)
return FALSE;
return TRUE;
}
static bfd_boolean
is_ppc64_elf_target (const struct bfd_target *targ)
{
extern const bfd_target bfd_elf64_powerpc_vec;
extern const bfd_target bfd_elf64_powerpcle_vec;
return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
}
default is 32 bit. */
static bfd_boolean
ppc64_elf_object_p (bfd *abfd)
{
if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
{
Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
{
abfd->arch_info = abfd->arch_info->next;
BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
}
}
return TRUE;
}
static bfd_boolean
ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
{
size_t offset, size;
if (note->descsz != 504)
return FALSE;
elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
offset = 112;
size = 384;
return _bfd_elfcore_make_pseudosection (abfd, ".reg",
size, note->descpos + offset);
}
static bfd_boolean
ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
{
if (note->descsz != 136)
return FALSE;
elf_tdata (abfd)->core_program
= _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
elf_tdata (abfd)->core_command
= _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
return TRUE;
}
object file when linking. */
static bfd_boolean
ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
{
if (ibfd->xvec->byteorder != obfd->xvec->byteorder
&& ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
&& obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
{
const char *msg;
if (bfd_big_endian (ibfd))
msg = _("%B: compiled for a big endian system "
"and target is little endian");
else
msg = _("%B: compiled for a little endian system "
"and target is big endian");
(*_bfd_error_handler) (msg, ibfd);
bfd_set_error (bfd_error_wrong_format);
return FALSE;
}
return TRUE;
}
static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
{
{ ".plt", 4, 0, SHT_NOBITS, 0 },
{ ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
{ ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
{ ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
{ ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
{ ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
{ NULL, 0, 0, 0, 0 }
};
struct _ppc64_elf_section_data
{
struct bfd_elf_section_data elf;
union
{
asection **func_sec;
long *adjust;
} opd;
Specifies the relocation symbol index used at a given toc offset. */
unsigned *t_symndx;
};
#define ppc64_elf_section_data(sec) \
((struct _ppc64_elf_section_data *) elf_section_data (sec))
static bfd_boolean
ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
{
struct _ppc64_elf_section_data *sdata;
bfd_size_type amt = sizeof (*sdata);
sdata = bfd_zalloc (abfd, amt);
if (sdata == NULL)
return FALSE;
sec->used_by_bfd = sdata;
return _bfd_elf_new_section_hook (abfd, sec);
}
static void *
get_opd_info (asection * sec)
{
if (sec != NULL
&& ppc64_elf_section_data (sec) != NULL
&& ppc64_elf_section_data (sec)->opd.adjust != NULL)
return ppc64_elf_section_data (sec)->opd.adjust;
return NULL;
}
static asection *synthetic_opd;
static bfd_boolean synthetic_relocatable;
static int
compare_symbols (const void *ap, const void *bp)
{
const asymbol *a = * (const asymbol **) ap;
const asymbol *b = * (const asymbol **) bp;
if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
return -1;
if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
return 1;
if (a->section == synthetic_opd && b->section != synthetic_opd)
return -1;
if (a->section != synthetic_opd && b->section == synthetic_opd)
return 1;
if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
== (SEC_CODE | SEC_ALLOC)
&& (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
!= (SEC_CODE | SEC_ALLOC))
return -1;
if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
!= (SEC_CODE | SEC_ALLOC)
&& (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
== (SEC_CODE | SEC_ALLOC))
return 1;
if (synthetic_relocatable)
{
if (a->section->id < b->section->id)
return -1;
if (a->section->id > b->section->id)
return 1;
}
if (a->value + a->section->vma < b->value + b->section->vma)
return -1;
if (a->value + a->section->vma > b->value + b->section->vma)
return 1;
syms over other syms. */
if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
return -1;
if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
return 1;
if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
return -1;
if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
return 1;
if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
return -1;
if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
return 1;
if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
return -1;
if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
return 1;
return 0;
}
static asymbol *
sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
{
long mid;
if (id == -1)
{
while (lo < hi)
{
mid = (lo + hi) >> 1;
if (syms[mid]->value + syms[mid]->section->vma < value)
lo = mid + 1;
else if (syms[mid]->value + syms[mid]->section->vma > value)
hi = mid;
else
return syms[mid];
}
}
else
{
while (lo < hi)
{
mid = (lo + hi) >> 1;
if (syms[mid]->section->id < id)
lo = mid + 1;
else if (syms[mid]->section->id > id)
hi = mid;
else if (syms[mid]->value < value)
lo = mid + 1;
else if (syms[mid]->value > value)
hi = mid;
else
return syms[mid];
}
}
return NULL;
}
entry syms. */
static long
ppc64_elf_get_synthetic_symtab (bfd *abfd,
long static_count, asymbol **static_syms,
long dyn_count, asymbol **dyn_syms,
asymbol **ret)
{
asymbol *s;
long i;
long count;
char *names;
long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
asection *opd;
bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
asymbol **syms;
*ret = NULL;
opd = bfd_get_section_by_name (abfd, ".opd");
if (opd == NULL)
return 0;
symcount = static_count;
if (!relocatable)
symcount += dyn_count;
if (symcount == 0)
return 0;
syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
if (syms == NULL)
return -1;
if (!relocatable && static_count != 0 && dyn_count != 0)
{
memcpy (syms, static_syms, static_count * sizeof (*syms));
memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
}
else if (!relocatable && static_count == 0)
memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
else
memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
synthetic_opd = opd;
synthetic_relocatable = relocatable;
qsort (syms, symcount, sizeof (*syms), compare_symbols);
if (!relocatable && symcount > 1)
{
long j;
dynamic symbols. Actually, we only care about syms that have
different values, so trim any with the same value. */
for (i = 1, j = 1; i < symcount; ++i)
if (syms[i - 1]->value + syms[i - 1]->section->vma
!= syms[i]->value + syms[i]->section->vma)
syms[j++] = syms[i];
symcount = j;
}
i = 0;
if (syms[i]->section == opd)
++i;
codesecsym = i;
for (; i < symcount; ++i)
if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
!= (SEC_CODE | SEC_ALLOC))
|| (syms[i]->flags & BSF_SECTION_SYM) == 0)
break;
codesecsymend = i;
for (; i < symcount; ++i)
if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
break;
secsymend = i;
for (; i < symcount; ++i)
if (syms[i]->section != opd)
break;
opdsymend = i;
for (; i < symcount; ++i)
if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
!= (SEC_CODE | SEC_ALLOC))
break;
symcount = i;
count = 0;
if (opdsymend == secsymend)
goto done;
if (relocatable)
{
bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
arelent *r;
size_t size;
long relcount;
slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
if (relcount == 0)
goto done;
if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
{
count = -1;
goto done;
}
size = 0;
for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
{
asymbol *sym;
while (r < opd->relocation + relcount
&& r->address < syms[i]->value + opd->vma)
++r;
if (r == opd->relocation + relcount)
break;
if (r->address != syms[i]->value + opd->vma)
continue;
if (r->howto->type != R_PPC64_ADDR64)
continue;
sym = *r->sym_ptr_ptr;
if (!sym_exists_at (syms, opdsymend, symcount,
sym->section->id, sym->value + r->addend))
{
++count;
size += sizeof (asymbol);
size += strlen (syms[i]->name) + 2;
}
}
s = *ret = bfd_malloc (size);
if (s == NULL)
{
count = -1;
goto done;
}
names = (char *) (s + count);
for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
{
asymbol *sym;
while (r < opd->relocation + relcount
&& r->address < syms[i]->value + opd->vma)
++r;
if (r == opd->relocation + relcount)
break;
if (r->address != syms[i]->value + opd->vma)
continue;
if (r->howto->type != R_PPC64_ADDR64)
continue;
sym = *r->sym_ptr_ptr;
if (!sym_exists_at (syms, opdsymend, symcount,
sym->section->id, sym->value + r->addend))
{
size_t len;
*s = *syms[i];
s->section = sym->section;
s->value = sym->value + r->addend;
s->name = names;
*names++ = '.';
len = strlen (syms[i]->name);
memcpy (names, syms[i]->name, len + 1);
names += len + 1;
s++;
}
}
}
else
{
bfd_byte *contents;
size_t size;
if (!bfd_malloc_and_get_section (abfd, opd, &contents))
{
if (contents)
{
free_contents_and_exit:
free (contents);
}
count = -1;
goto done;
}
size = 0;
for (i = secsymend; i < opdsymend; ++i)
{
bfd_vma ent;
ent = bfd_get_64 (abfd, contents + syms[i]->value);
if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
{
++count;
size += sizeof (asymbol);
size += strlen (syms[i]->name) + 2;
}
}
s = *ret = bfd_malloc (size);
if (s == NULL)
goto free_contents_and_exit;
names = (char *) (s + count);
for (i = secsymend; i < opdsymend; ++i)
{
bfd_vma ent;
ent = bfd_get_64 (abfd, contents + syms[i]->value);
if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
{
long lo, hi;
size_t len;
asection *sec = abfd->sections;
*s = *syms[i];
lo = codesecsym;
hi = codesecsymend;
while (lo < hi)
{
long mid = (lo + hi) >> 1;
if (syms[mid]->section->vma < ent)
lo = mid + 1;
else if (syms[mid]->section->vma > ent)
hi = mid;
else
{
sec = syms[mid]->section;
break;
}
}
if (lo >= hi && lo > codesecsym)
sec = syms[lo - 1]->section;
for (; sec != NULL; sec = sec->next)
{
if (sec->vma > ent)
break;
if ((sec->flags & SEC_ALLOC) == 0
|| (sec->flags & SEC_LOAD) == 0)
break;
if ((sec->flags & SEC_CODE) != 0)
s->section = sec;
}
s->value = ent - s->section->vma;
s->name = names;
*names++ = '.';
len = strlen (syms[i]->name);
memcpy (names, syms[i]->name, len + 1);
names += len + 1;
s++;
}
}
free (contents);
}
done:
free (syms);
return count;
}
functions above are used generally. Those named ppc64_elf_* are
called by the main ELF linker code. They appear in this file more
or less in the order in which they are called. eg.
ppc64_elf_check_relocs is called early in the link process,
ppc64_elf_finish_dynamic_sections is one of the last functions
called.
PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
functions have both a function code symbol and a function descriptor
symbol. A call to foo in a relocatable object file looks like:
. .text
. x:
. bl .foo
. nop
The function definition in another object file might be:
. .section .opd
. foo: .quad .foo
. .quad .TOC.@tocbase
. .quad 0
.
. .text
. .foo: blr
When the linker resolves the call during a static link, the branch
unsurprisingly just goes to .foo and the .opd information is unused.
If the function definition is in a shared library, things are a little
different: The call goes via a plt call stub, the opd information gets
copied to the plt, and the linker patches the nop.
. x:
. bl .foo_stub
. ld 2,40(1)
.
.
. .foo_stub:
. addis 12,2,Lfoo@toc@ha # in practice, the call stub
. addi 12,12,Lfoo@toc@l # is slightly optimized, but
. std 2,40(1) # this is the general idea
. ld 11,0(12)
. ld 2,8(12)
. mtctr 11
. ld 11,16(12)
. bctr
.
. .section .plt
. Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
The "reloc ()" notation is supposed to indicate that the linker emits
an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
copying.
What are the difficulties here? Well, firstly, the relocations
examined by the linker in check_relocs are against the function code
sym .foo, while the dynamic relocation in the plt is emitted against
the function descriptor symbol, foo. Somewhere along the line, we need
to carefully copy dynamic link information from one symbol to the other.
Secondly, the generic part of the elf linker will make .foo a dynamic
symbol as is normal for most other backends. We need foo dynamic
instead, at least for an application final link. However, when
creating a shared library containing foo, we need to have both symbols
dynamic so that references to .foo are satisfied during the early
stages of linking. Otherwise the linker might decide to pull in a
definition from some other object, eg. a static library.
Update: As of August 2004, we support a new convention. Function
calls may use the function descriptor symbol, ie. "bl foo". This
behaves exactly as "bl .foo". */
decides to copy as dynamic relocs in check_relocs for each symbol.
This is so that it can later discard them if they are found to be
unnecessary. We store the information in a field extending the
regular ELF linker hash table. */
struct ppc_dyn_relocs
{
struct ppc_dyn_relocs *next;
asection *sec;
bfd_size_type count;
bfd_size_type pc_count;
};
than one got entry per symbol. */
struct got_entry
{
struct got_entry *next;
bfd_vma addend;
symbol referenced from different input files. This is to support
automatic multiple TOC/GOT sections, where the TOC base can vary
from one input file to another.
Point to the BFD owning this GOT entry. */
bfd *owner;
TLS_TPREL or TLS_DTPREL for tls entries. */
char tls_type;
union
{
bfd_signed_vma refcount;
bfd_vma offset;
} got;
};
struct plt_entry
{
struct plt_entry *next;
bfd_vma addend;
union
{
bfd_signed_vma refcount;
bfd_vma offset;
} plt;
};
selects those that must be copied when linking a shared library,
even when the symbol is local. */
#define MUST_BE_DYN_RELOC(RTYPE) \
((RTYPE) != R_PPC64_REL32 \
&& (RTYPE) != R_PPC64_REL64 \
&& (RTYPE) != R_PPC64_REL30)
copying dynamic variables from a shared lib into an app's dynbss
section, and instead use a dynamic relocation to point into the
shared lib. With code that gcc generates, it's vital that this be
enabled; In the PowerPC64 ABI, the address of a function is actually
the address of a function descriptor, which resides in the .opd
section. gcc uses the descriptor directly rather than going via the
GOT as some other ABI's do, which means that initialized function
pointers must reference the descriptor. Thus, a function pointer
initialized to the address of a function in a shared library will
either require a copy reloc, or a dynamic reloc. Using a copy reloc
redefines the function descriptor symbol to point to the copy. This
presents a problem as a plt entry for that function is also
initialized from the function descriptor symbol and the copy reloc
may not be initialized first. */
#define ELIMINATE_COPY_RELOCS 1
string. */
#define STUB_SUFFIX ".stub"
ppc_stub_long_branch:
Used when a 14 bit branch (or even a 24 bit branch) can't reach its
destination, but a 24 bit branch in a stub section will reach.
. b dest
ppc_stub_plt_branch:
Similar to the above, but a 24 bit branch in the stub section won't
reach its destination.
. addis %r12,%r2,xxx@toc@ha
. ld %r11,xxx@toc@l(%r12)
. mtctr %r11
. bctr
ppc_stub_plt_call:
Used to call a function in a shared library. If it so happens that
the plt entry referenced crosses a 64k boundary, then an extra
"addis %r12,%r12,1" will be inserted before the load at xxx+8 or
xxx+16 as appropriate.
. addis %r12,%r2,xxx@toc@ha
. std %r2,40(%r1)
. ld %r11,xxx+0@toc@l(%r12)
. ld %r2,xxx+8@toc@l(%r12)
. mtctr %r11
. ld %r11,xxx+16@toc@l(%r12)
. bctr
ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
code to adjust the value and save r2 to support multiple toc sections.
A ppc_stub_long_branch with an r2 offset looks like:
. std %r2,40(%r1)
. addis %r2,%r2,off@ha
. addi %r2,%r2,off@l
. b dest
A ppc_stub_plt_branch with an r2 offset looks like:
. std %r2,40(%r1)
. addis %r12,%r2,xxx@toc@ha
. ld %r11,xxx@toc@l(%r12)
. addis %r2,%r2,off@ha
. addi %r2,%r2,off@l
. mtctr %r11
. bctr
*/
enum ppc_stub_type {
ppc_stub_none,
ppc_stub_long_branch,
ppc_stub_long_branch_r2off,
ppc_stub_plt_branch,
ppc_stub_plt_branch_r2off,
ppc_stub_plt_call
};
struct ppc_stub_hash_entry {
struct bfd_hash_entry root;
enum ppc_stub_type stub_type;
asection *stub_sec;
bfd_vma stub_offset;
value when building the stubs (so the stub knows where to jump. */
bfd_vma target_value;
asection *target_section;
struct ppc_link_hash_entry *h;
bfd_vma addend;
stub sections, the first input section in the group. */
asection *id_sec;
};
struct ppc_branch_hash_entry {
struct bfd_hash_entry root;
unsigned int offset;
unsigned int iter;
};
struct ppc_link_hash_entry
{
struct elf_link_hash_entry elf;
symbol. */
struct ppc_stub_hash_entry *stub_cache;
struct ppc_dyn_relocs *dyn_relocs;
struct ppc_link_hash_entry *oh;
unsigned int is_func:1;
unsigned int is_func_descriptor:1;
unsigned int fake:1;
After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
should be set for all globals defined in any opd/toc section. */
unsigned int adjust_done:1;
unsigned int was_undefined:1;
TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
corresponding relocs are encountered during check_relocs.
tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
indicate the corresponding GOT entry type is not needed.
tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
a TPREL one. We use a separate flag rather than setting TPREL
just for convenience in distinguishing the two cases. */
#define TLS_GD 1 /* GD reloc. */
#define TLS_LD 2 /* LD reloc. */
#define TLS_TPREL 4 /* TPREL reloc, => IE. */
#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
#define TLS_TLS 16 /* Any TLS reloc. */
#define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
#define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
char tls_mask;
};
struct ppc_link_hash_table
{
struct elf_link_hash_table elf;
struct bfd_hash_table stub_hash_table;
struct bfd_hash_table branch_hash_table;
bfd *stub_bfd;
asection * (*add_stub_section) (const char *, asection *);
void (*layout_sections_again) (void);
information on stub grouping. */
struct map_stub {
asection *link_sec;
asection *stub_sec;
bfd_vma toc_off;
} *stub_group;
bfd_vma toc_curr;
int top_id;
int top_index;
asection **input_list;
asection *got;
asection *plt;
asection *relplt;
asection *dynbss;
asection *relbss;
asection *glink;
asection *sfpr;
asection *brlt;
asection *relbrlt;
struct ppc_link_hash_entry *tls_get_addr;
struct ppc_link_hash_entry *tls_get_addr_fd;
unsigned long stub_count[ppc_stub_plt_call];
unsigned long stub_globals;
unsigned int emit_stub_syms:1;
unsigned int no_multi_toc:1;
unsigned int multi_toc_needed:1;
unsigned int stub_error:1;
select suitable defaults for the stub group size. */
unsigned int has_14bit_branch:1;
unsigned int twiddled_syms:1;
unsigned int stub_iteration;
struct sym_sec_cache sym_sec;
};
are used here. */
#define has_toc_reloc has_gp_reloc
#define makes_toc_func_call need_finalize_relax
#define call_check_in_progress reloc_done
#define ppc_hash_table(p) \
((struct ppc_link_hash_table *) ((p)->hash))
#define ppc_stub_hash_lookup(table, string, create, copy) \
((struct ppc_stub_hash_entry *) \
bfd_hash_lookup ((table), (string), (create), (copy)))
#define ppc_branch_hash_lookup(table, string, create, copy) \
((struct ppc_branch_hash_entry *) \
bfd_hash_lookup ((table), (string), (create), (copy)))
static struct bfd_hash_entry *
stub_hash_newfunc (struct bfd_hash_entry *entry,
struct bfd_hash_table *table,
const char *string)
{
subclass. */
if (entry == NULL)
{
entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
if (entry == NULL)
return entry;
}
entry = bfd_hash_newfunc (entry, table, string);
if (entry != NULL)
{
struct ppc_stub_hash_entry *eh;
eh = (struct ppc_stub_hash_entry *) entry;
eh->stub_type = ppc_stub_none;
eh->stub_sec = NULL;
eh->stub_offset = 0;
eh->target_value = 0;
eh->target_section = NULL;
eh->h = NULL;
eh->id_sec = NULL;
}
return entry;
}
static struct bfd_hash_entry *
branch_hash_newfunc (struct bfd_hash_entry *entry,
struct bfd_hash_table *table,
const char *string)
{
subclass. */
if (entry == NULL)
{
entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
if (entry == NULL)
return entry;
}
entry = bfd_hash_newfunc (entry, table, string);
if (entry != NULL)
{
struct ppc_branch_hash_entry *eh;
eh = (struct ppc_branch_hash_entry *) entry;
eh->offset = 0;
eh->iter = 0;
}
return entry;
}
static struct bfd_hash_entry *
link_hash_newfunc (struct bfd_hash_entry *entry,
struct bfd_hash_table *table,
const char *string)
{
subclass. */
if (entry == NULL)
{
entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
if (entry == NULL)
return entry;
}
entry = _bfd_elf_link_hash_newfunc (entry, table, string);
if (entry != NULL)
{
struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
memset (&eh->stub_cache, 0,
(sizeof (struct ppc_link_hash_entry)
- offsetof (struct ppc_link_hash_entry, stub_cache)));
}
return entry;
}
static struct bfd_link_hash_table *
ppc64_elf_link_hash_table_create (bfd *abfd)
{
struct ppc_link_hash_table *htab;
bfd_size_type amt = sizeof (struct ppc_link_hash_table);
htab = bfd_zmalloc (amt);
if (htab == NULL)
return NULL;
if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
sizeof (struct ppc_link_hash_entry)))
{
free (htab);
return NULL;
}
if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
sizeof (struct ppc_stub_hash_entry)))
return NULL;
if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
sizeof (struct ppc_branch_hash_entry)))
return NULL;
only care about glist, but when compiled on a 32-bit host the
bfd_vma fields are larger. Setting the bfd_vma to zero makes
debugger inspection of these fields look nicer. */
htab->elf.init_got_refcount.refcount = 0;
htab->elf.init_got_refcount.glist = NULL;
htab->elf.init_plt_refcount.refcount = 0;
htab->elf.init_plt_refcount.glist = NULL;
htab->elf.init_got_offset.offset = 0;
htab->elf.init_got_offset.glist = NULL;
htab->elf.init_plt_offset.offset = 0;
htab->elf.init_plt_offset.glist = NULL;
return &htab->elf.root;
}
static void
ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
{
struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
bfd_hash_table_free (&ret->stub_hash_table);
bfd_hash_table_free (&ret->branch_hash_table);
_bfd_generic_link_hash_table_free (hash);
}
void
ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
linker created stub bfd. This ensures that the GOT header is at
the start of the output TOC section. */
htab = ppc_hash_table (info);
htab->stub_bfd = abfd;
htab->elf.dynobj = abfd;
}
static char *
ppc_stub_name (const asection *input_section,
const asection *sym_sec,
const struct ppc_link_hash_entry *h,
const Elf_Internal_Rela *rel)
{
char *stub_name;
bfd_size_type len;
offsets from a sym as a branch target? In fact, we could
probably assume the addend is always zero. */
BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
if (h)
{
len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
stub_name = bfd_malloc (len);
if (stub_name == NULL)
return stub_name;
sprintf (stub_name, "%08x.%s+%x",
input_section->id & 0xffffffff,
h->elf.root.root.string,
(int) rel->r_addend & 0xffffffff);
}
else
{
len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
stub_name = bfd_malloc (len);
if (stub_name == NULL)
return stub_name;
sprintf (stub_name, "%08x.%x:%x+%x",
input_section->id & 0xffffffff,
sym_sec->id & 0xffffffff,
(int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
(int) rel->r_addend & 0xffffffff);
}
if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
stub_name[len - 2] = 0;
return stub_name;
}
creating the stub name takes a bit of time. */
static struct ppc_stub_hash_entry *
ppc_get_stub_entry (const asection *input_section,
const asection *sym_sec,
struct ppc_link_hash_entry *h,
const Elf_Internal_Rela *rel,
struct ppc_link_hash_table *htab)
{
struct ppc_stub_hash_entry *stub_entry;
const asection *id_sec;
stub section, then use the id of the first section in the group.
Stub names need to include a section id, as there may well be
more than one stub used to reach say, printf, and we need to
distinguish between them. */
id_sec = htab->stub_group[input_section->id].link_sec;
if (h != NULL && h->stub_cache != NULL
&& h->stub_cache->h == h
&& h->stub_cache->id_sec == id_sec)
{
stub_entry = h->stub_cache;
}
else
{
char *stub_name;
stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
if (stub_name == NULL)
return NULL;
stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
stub_name, FALSE, FALSE);
if (h != NULL)
h->stub_cache = stub_entry;
free (stub_name);
}
return stub_entry;
}
stub entry are initialised. */
static struct ppc_stub_hash_entry *
ppc_add_stub (const char *stub_name,
asection *section,
struct ppc_link_hash_table *htab)
{
asection *link_sec;
asection *stub_sec;
struct ppc_stub_hash_entry *stub_entry;
link_sec = htab->stub_group[section->id].link_sec;
stub_sec = htab->stub_group[section->id].stub_sec;
if (stub_sec == NULL)
{
stub_sec = htab->stub_group[link_sec->id].stub_sec;
if (stub_sec == NULL)
{
size_t namelen;
bfd_size_type len;
char *s_name;
namelen = strlen (link_sec->name);
len = namelen + sizeof (STUB_SUFFIX);
s_name = bfd_alloc (htab->stub_bfd, len);
if (s_name == NULL)
return NULL;
memcpy (s_name, link_sec->name, namelen);
memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
stub_sec = (*htab->add_stub_section) (s_name, link_sec);
if (stub_sec == NULL)
return NULL;
htab->stub_group[link_sec->id].stub_sec = stub_sec;
}
htab->stub_group[section->id].stub_sec = stub_sec;
}
stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
TRUE, FALSE);
if (stub_entry == NULL)
{
(*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
section->owner, stub_name);
return NULL;
}
stub_entry->stub_sec = stub_sec;
stub_entry->stub_offset = 0;
stub_entry->id_sec = link_sec;
return stub_entry;
}
static bfd_boolean
create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
flagword flags;
htab = ppc_hash_table (info);
flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
flags);
if (htab->sfpr == NULL
|| ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
return FALSE;
htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
flags);
if (htab->glink == NULL
|| ! bfd_set_section_alignment (dynobj, htab->glink, 2))
return FALSE;
if (info->shared)
{
flags = (SEC_ALLOC | SEC_LOAD
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
htab->brlt
= bfd_make_section_anyway_with_flags (dynobj, ".data.rel.ro.brlt",
flags);
}
else
{
flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
htab->brlt
= bfd_make_section_anyway_with_flags (dynobj, ".rodata.brlt", flags);
}
if (htab->brlt == NULL
|| ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
return FALSE;
if (info->shared)
{
flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
htab->relbrlt
= bfd_make_section_anyway_with_flags (dynobj, ".rela.data.rel.ro.brlt",
flags);
}
else if (info->emitrelocations)
{
flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
htab->relbrlt
= bfd_make_section_anyway_with_flags (dynobj, ".rela.rodata.brlt",
flags);
}
else
return TRUE;
if (!htab->relbrlt
|| ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
return FALSE;
return TRUE;
}
not already done. */
static bfd_boolean
create_got_section (bfd *abfd, struct bfd_link_info *info)
{
asection *got, *relgot;
flagword flags;
struct ppc_link_hash_table *htab = ppc_hash_table (info);
if (!htab->got)
{
if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
return FALSE;
htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
if (!htab->got)
abort ();
}
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
| SEC_LINKER_CREATED);
got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
if (!got
|| !bfd_set_section_alignment (abfd, got, 3))
return FALSE;
relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
flags | SEC_READONLY);
if (!relgot
|| ! bfd_set_section_alignment (abfd, relgot, 3))
return FALSE;
ppc64_elf_tdata (abfd)->got = got;
ppc64_elf_tdata (abfd)->relgot = relgot;
return TRUE;
}
static bfd_boolean
ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
if (!_bfd_elf_create_dynamic_sections (dynobj, info))
return FALSE;
htab = ppc_hash_table (info);
if (!htab->got)
htab->got = bfd_get_section_by_name (dynobj, ".got");
htab->plt = bfd_get_section_by_name (dynobj, ".plt");
htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
if (!info->shared)
htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
|| (!info->shared && !htab->relbss))
abort ();
return TRUE;
}
static void
move_plt_plist (struct ppc_link_hash_entry *from,
struct ppc_link_hash_entry *to)
{
if (from->elf.plt.plist != NULL)
{
if (to->elf.plt.plist != NULL)
{
struct plt_entry **entp;
struct plt_entry *ent;
for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
{
struct plt_entry *dent;
for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
if (dent->addend == ent->addend)
{
dent->plt.refcount += ent->plt.refcount;
*entp = ent->next;
break;
}
if (dent == NULL)
entp = &ent->next;
}
*entp = to->elf.plt.plist;
}
to->elf.plt.plist = from->elf.plt.plist;
from->elf.plt.plist = NULL;
}
}
static void
ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
struct elf_link_hash_entry *dir,
struct elf_link_hash_entry *ind)
{
struct ppc_link_hash_entry *edir, *eind;
edir = (struct ppc_link_hash_entry *) dir;
eind = (struct ppc_link_hash_entry *) ind;
if (eind->dyn_relocs != NULL)
{
if (edir->dyn_relocs != NULL)
{
struct ppc_dyn_relocs **pp;
struct ppc_dyn_relocs *p;
list. Merge any entries against the same section. */
for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
{
struct ppc_dyn_relocs *q;
for (q = edir->dyn_relocs; q != NULL; q = q->next)
if (q->sec == p->sec)
{
q->pc_count += p->pc_count;
q->count += p->count;
*pp = p->next;
break;
}
if (q == NULL)
pp = &p->next;
}
*pp = edir->dyn_relocs;
}
edir->dyn_relocs = eind->dyn_relocs;
eind->dyn_relocs = NULL;
}
edir->is_func |= eind->is_func;
edir->is_func_descriptor |= eind->is_func_descriptor;
edir->tls_mask |= eind->tls_mask;
of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
We clear it ourselves for ELIMINATE_COPY_RELOCS. */
if (!(ELIMINATE_COPY_RELOCS
&& eind->elf.root.type != bfd_link_hash_indirect
&& edir->elf.dynamic_adjusted))
edir->elf.non_got_ref |= eind->elf.non_got_ref;
edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
edir->elf.ref_regular |= eind->elf.ref_regular;
edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
edir->elf.needs_plt |= eind->elf.needs_plt;
if (eind->elf.root.type != bfd_link_hash_indirect)
return;
symbol which just became indirect. */
if (eind->elf.got.glist != NULL)
{
if (edir->elf.got.glist != NULL)
{
struct got_entry **entp;
struct got_entry *ent;
for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
{
struct got_entry *dent;
for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
if (dent->addend == ent->addend
&& dent->owner == ent->owner
&& dent->tls_type == ent->tls_type)
{
dent->got.refcount += ent->got.refcount;
*entp = ent->next;
break;
}
if (dent == NULL)
entp = &ent->next;
}
*entp = edir->elf.got.glist;
}
edir->elf.got.glist = eind->elf.got.glist;
eind->elf.got.glist = NULL;
}
move_plt_plist (eind, edir);
if (eind->elf.dynindx != -1)
{
if (edir->elf.dynindx != -1)
_bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
edir->elf.dynstr_index);
edir->elf.dynindx = eind->elf.dynindx;
edir->elf.dynstr_index = eind->elf.dynstr_index;
eind->elf.dynindx = -1;
eind->elf.dynstr_index = 0;
}
}
hash entry FH. Link the entries via their OH fields. */
static struct ppc_link_hash_entry *
get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
{
struct ppc_link_hash_entry *fdh = fh->oh;
if (fdh == NULL)
{
const char *fd_name = fh->elf.root.root.string + 1;
fdh = (struct ppc_link_hash_entry *)
elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
if (fdh != NULL)
{
fdh->is_func_descriptor = 1;
fdh->oh = fh;
fh->is_func = 1;
fh->oh = fdh;
}
}
return fdh;
}
static struct ppc_link_hash_entry *
make_fdh (struct bfd_link_info *info,
struct ppc_link_hash_entry *fh)
{
bfd *abfd;
asymbol *newsym;
struct bfd_link_hash_entry *bh;
struct ppc_link_hash_entry *fdh;
abfd = fh->elf.root.u.undef.abfd;
newsym = bfd_make_empty_symbol (abfd);
newsym->name = fh->elf.root.root.string + 1;
newsym->section = bfd_und_section_ptr;
newsym->value = 0;
newsym->flags = BSF_WEAK;
bh = NULL;
if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
newsym->flags, newsym->section,
newsym->value, NULL, FALSE, FALSE,
&bh))
return NULL;
fdh = (struct ppc_link_hash_entry *) bh;
fdh->elf.non_elf = 0;
fdh->fake = 1;
fdh->is_func_descriptor = 1;
fdh->oh = fh;
fh->is_func = 1;
fh->oh = fdh;
return fdh;
}
When making function calls, old ABI code references function entry
points (dot symbols), while new ABI code references the function
descriptor symbol. We need to make any combination of reference and
definition work together, without breaking archive linking.
For a defined function "foo" and an undefined call to "bar":
An old object defines "foo" and ".foo", references ".bar" (possibly
"bar" too).
A new object defines "foo" and references "bar".
A new object thus has no problem with its undefined symbols being
satisfied by definitions in an old object. On the other hand, the
old object won't have ".bar" satisfied by a new object. */
function type. */
static bfd_boolean
ppc64_elf_add_symbol_hook (bfd *ibfd,
struct bfd_link_info *info ATTRIBUTE_UNUSED,
Elf_Internal_Sym *isym,
const char **name,
flagword *flags ATTRIBUTE_UNUSED,
asection **sec,
bfd_vma *value ATTRIBUTE_UNUSED)
{
if (*sec != NULL
&& strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
if ((*name)[0] == '.'
&& ELF_ST_BIND (isym->st_info) == STB_GLOBAL
&& ELF_ST_TYPE (isym->st_info) < STT_SECTION
&& is_ppc64_elf_target (ibfd->xvec))
ppc64_elf_tdata (ibfd)->u.has_dotsym = 1;
return TRUE;
}
inclusion of a new ABI object archive that defines "bar".
NAME is a symbol defined in an archive. Return a symbol in the hash
table that might be satisfied by the archive symbols. */
static struct elf_link_hash_entry *
ppc64_elf_archive_symbol_lookup (bfd *abfd,
struct bfd_link_info *info,
const char *name)
{
struct elf_link_hash_entry *h;
char *dot_name;
size_t len;
h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
if (h != NULL
created by add_symbol_adjust. */
&& !(h->root.type == bfd_link_hash_undefweak
&& ((struct ppc_link_hash_entry *) h)->fake))
return h;
if (name[0] == '.')
return h;
len = strlen (name);
dot_name = bfd_alloc (abfd, len + 2);
if (dot_name == NULL)
return (struct elf_link_hash_entry *) 0 - 1;
dot_name[0] = '.';
memcpy (dot_name + 1, name, len + 1);
h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
bfd_release (abfd, dot_name);
return h;
}
new ABI object defines "bar". Well, at least, undefined dot symbols
are made weak. This stops later archive searches from including an
object if we already have a function descriptor definition. It also
prevents the linker complaining about undefined symbols.
We also check and correct mismatched symbol visibility here. The
most restrictive visibility of the function descriptor and the
function entry symbol is used. */
struct add_symbol_adjust_data
{
struct bfd_link_info *info;
bfd_boolean ok;
};
static bfd_boolean
add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
{
struct add_symbol_adjust_data *data;
struct ppc_link_hash_table *htab;
struct ppc_link_hash_entry *eh;
struct ppc_link_hash_entry *fdh;
if (h->root.type == bfd_link_hash_indirect)
return TRUE;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if (h->root.root.string[0] != '.')
return TRUE;
data = inf;
htab = ppc_hash_table (data->info);
eh = (struct ppc_link_hash_entry *) h;
fdh = get_fdh (eh, htab);
if (fdh == NULL
&& !data->info->relocatable
&& (eh->elf.root.type == bfd_link_hash_undefined
|| eh->elf.root.type == bfd_link_hash_undefweak)
&& eh->elf.ref_regular)
{
pull in an --as-needed shared lib, but won't cause link
errors. Archives are handled elsewhere. */
fdh = make_fdh (data->info, eh);
if (fdh == NULL)
data->ok = FALSE;
else
fdh->elf.ref_regular = 1;
}
else if (fdh != NULL)
{
unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
if (entry_vis < descr_vis)
fdh->elf.other += entry_vis - descr_vis;
else if (entry_vis > descr_vis)
eh->elf.other += descr_vis - entry_vis;
if ((fdh->elf.root.type == bfd_link_hash_defined
|| fdh->elf.root.type == bfd_link_hash_defweak)
&& eh->elf.root.type == bfd_link_hash_undefined)
{
eh->elf.root.type = bfd_link_hash_undefweak;
eh->was_undefined = 1;
htab->twiddled_syms = 1;
}
}
return TRUE;
}
static bfd_boolean
ppc64_elf_check_directives (bfd *abfd, struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
struct add_symbol_adjust_data data;
if (!is_ppc64_elf_target (abfd->xvec))
return TRUE;
if (!ppc64_elf_tdata (abfd)->u.has_dotsym)
return TRUE;
ppc64_elf_tdata (abfd)->u.deleted_section = NULL;
htab = ppc_hash_table (info);
if (!is_ppc64_elf_target (htab->elf.root.creator))
return TRUE;
data.info = info;
data.ok = TRUE;
elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
undef_weak. */
if (htab->twiddled_syms)
{
bfd_link_repair_undef_list (&htab->elf.root);
htab->twiddled_syms = 0;
}
return data.ok;
}
static bfd_boolean
update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
unsigned long r_symndx, bfd_vma r_addend, int tls_type)
{
struct got_entry **local_got_ents = elf_local_got_ents (abfd);
char *local_got_tls_masks;
if (local_got_ents == NULL)
{
bfd_size_type size = symtab_hdr->sh_info;
size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
local_got_ents = bfd_zalloc (abfd, size);
if (local_got_ents == NULL)
return FALSE;
elf_local_got_ents (abfd) = local_got_ents;
}
if ((tls_type & TLS_EXPLICIT) == 0)
{
struct got_entry *ent;
for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
if (ent->addend == r_addend
&& ent->owner == abfd
&& ent->tls_type == tls_type)
break;
if (ent == NULL)
{
bfd_size_type amt = sizeof (*ent);
ent = bfd_alloc (abfd, amt);
if (ent == NULL)
return FALSE;
ent->next = local_got_ents[r_symndx];
ent->addend = r_addend;
ent->owner = abfd;
ent->tls_type = tls_type;
ent->got.refcount = 0;
local_got_ents[r_symndx] = ent;
}
ent->got.refcount += 1;
}
local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
local_got_tls_masks[r_symndx] |= tls_type;
return TRUE;
}
static bfd_boolean
update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
{
struct plt_entry *ent;
for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
if (ent->addend == addend)
break;
if (ent == NULL)
{
bfd_size_type amt = sizeof (*ent);
ent = bfd_alloc (abfd, amt);
if (ent == NULL)
return FALSE;
ent->next = eh->elf.plt.plist;
ent->addend = addend;
ent->plt.refcount = 0;
eh->elf.plt.plist = ent;
}
ent->plt.refcount += 1;
eh->elf.needs_plt = 1;
if (eh->elf.root.root.string[0] == '.'
&& eh->elf.root.root.string[1] != '\0')
eh->is_func = 1;
return TRUE;
}
calculate needed space in the global offset table, procedure
linkage table, and dynamic reloc sections. */
static bfd_boolean
ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
asection *sec, const Elf_Internal_Rela *relocs)
{
struct ppc_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
asection *sreloc;
asection **opd_sym_map;
if (info->relocatable)
return TRUE;
In particular, any relocs in such sections should not affect GOT
and PLT reference counting (ie. we don't allow them to create GOT
or PLT entries), there's no possibility or desire to optimize TLS
relocs, and there's not much point in propagating relocs to shared
libs that the dynamic linker won't relocate. */
if ((sec->flags & SEC_ALLOC) == 0)
return TRUE;
htab = ppc_hash_table (info);
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
sym_hashes_end = (sym_hashes
+ symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
- symtab_hdr->sh_info);
sreloc = NULL;
opd_sym_map = NULL;
if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
{
We don't want to necessarily keep everything referenced by
relocs in .opd, as that would keep all functions. Instead,
if we reference an .opd symbol (a function descriptor), we
want to keep the function code symbol's section. This is
easy for global symbols, but for local syms we need to keep
information about the associated function section. Later, if
edit_opd deletes entries, we'll use this array to adjust
local syms in .opd. */
union opd_info {
asection *func_section;
long entry_adjust;
};
bfd_size_type amt;
amt = sec->size * sizeof (union opd_info) / 8;
opd_sym_map = bfd_zalloc (abfd, amt);
if (opd_sym_map == NULL)
return FALSE;
ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
}
if (htab->sfpr == NULL
&& !create_linkage_sections (htab->elf.dynobj, info))
return FALSE;
rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
{
unsigned long r_symndx;
struct elf_link_hash_entry *h;
enum elf_ppc64_reloc_type r_type;
int tls_type = 0;
r_symndx = ELF64_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
h = NULL;
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
}
r_type = ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
case R_PPC64_GOT_TLSLD16:
case R_PPC64_GOT_TLSLD16_LO:
case R_PPC64_GOT_TLSLD16_HI:
case R_PPC64_GOT_TLSLD16_HA:
ppc64_tlsld_got (abfd)->refcount += 1;
tls_type = TLS_TLS | TLS_LD;
goto dogottls;
case R_PPC64_GOT_TLSGD16:
case R_PPC64_GOT_TLSGD16_LO:
case R_PPC64_GOT_TLSGD16_HI:
case R_PPC64_GOT_TLSGD16_HA:
tls_type = TLS_TLS | TLS_GD;
goto dogottls;
case R_PPC64_GOT_TPREL16_DS:
case R_PPC64_GOT_TPREL16_LO_DS:
case R_PPC64_GOT_TPREL16_HI:
case R_PPC64_GOT_TPREL16_HA:
if (info->shared)
info->flags |= DF_STATIC_TLS;
tls_type = TLS_TLS | TLS_TPREL;
goto dogottls;
case R_PPC64_GOT_DTPREL16_DS:
case R_PPC64_GOT_DTPREL16_LO_DS:
case R_PPC64_GOT_DTPREL16_HI:
case R_PPC64_GOT_DTPREL16_HA:
tls_type = TLS_TLS | TLS_DTPREL;
dogottls:
sec->has_tls_reloc = 1;
case R_PPC64_GOT16:
case R_PPC64_GOT16_DS:
case R_PPC64_GOT16_HA:
case R_PPC64_GOT16_HI:
case R_PPC64_GOT16_LO:
case R_PPC64_GOT16_LO_DS:
sec->has_toc_reloc = 1;
if (ppc64_elf_tdata (abfd)->got == NULL
&& !create_got_section (abfd, info))
return FALSE;
if (h != NULL)
{
struct ppc_link_hash_entry *eh;
struct got_entry *ent;
eh = (struct ppc_link_hash_entry *) h;
for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
if (ent->addend == rel->r_addend
&& ent->owner == abfd
&& ent->tls_type == tls_type)
break;
if (ent == NULL)
{
bfd_size_type amt = sizeof (*ent);
ent = bfd_alloc (abfd, amt);
if (ent == NULL)
return FALSE;
ent->next = eh->elf.got.glist;
ent->addend = rel->r_addend;
ent->owner = abfd;
ent->tls_type = tls_type;
ent->got.refcount = 0;
eh->elf.got.glist = ent;
}
ent->got.refcount += 1;
eh->tls_mask |= tls_type;
}
else
if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
rel->r_addend, tls_type))
return FALSE;
break;
case R_PPC64_PLT16_HA:
case R_PPC64_PLT16_HI:
case R_PPC64_PLT16_LO:
case R_PPC64_PLT32:
case R_PPC64_PLT64:
actually build the entry in adjust_dynamic_symbol,
because this might be a case of linking PIC code without
linking in any dynamic objects, in which case we don't
need to generate a procedure linkage table after all. */
if (h == NULL)
{
table entry for a local symbol. */
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
else
if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
rel->r_addend))
return FALSE;
break;
relocation if linking a shared object since they are
section relative. */
case R_PPC64_SECTOFF:
case R_PPC64_SECTOFF_LO:
case R_PPC64_SECTOFF_HI:
case R_PPC64_SECTOFF_HA:
case R_PPC64_SECTOFF_DS:
case R_PPC64_SECTOFF_LO_DS:
case R_PPC64_DTPREL16:
case R_PPC64_DTPREL16_LO:
case R_PPC64_DTPREL16_HI:
case R_PPC64_DTPREL16_HA:
case R_PPC64_DTPREL16_DS:
case R_PPC64_DTPREL16_LO_DS:
case R_PPC64_DTPREL16_HIGHER:
case R_PPC64_DTPREL16_HIGHERA:
case R_PPC64_DTPREL16_HIGHEST:
case R_PPC64_DTPREL16_HIGHESTA:
break;
case R_PPC64_TOC16:
case R_PPC64_TOC16_LO:
case R_PPC64_TOC16_HI:
case R_PPC64_TOC16_HA:
case R_PPC64_TOC16_DS:
case R_PPC64_TOC16_LO_DS:
sec->has_toc_reloc = 1;
break;
Reconstruct it for later use during GC. */
case R_PPC64_GNU_VTINHERIT:
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
return FALSE;
break;
used. Record for later use during GC. */
case R_PPC64_GNU_VTENTRY:
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
return FALSE;
break;
case R_PPC64_REL14:
case R_PPC64_REL14_BRTAKEN:
case R_PPC64_REL14_BRNTAKEN:
{
asection *dest = NULL;
we are going to need a stub. */
if (h != NULL)
{
don't assume we know where a weak sym lives. */
if (h->root.type == bfd_link_hash_defined)
dest = h->root.u.def.section;
}
else
dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
sec, r_symndx);
if (dest != sec)
htab->has_14bit_branch = 1;
}
case R_PPC64_REL24:
if (h != NULL)
{
refers to is in a shared lib. */
if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
rel->r_addend))
return FALSE;
if (h == &htab->tls_get_addr->elf
|| h == &htab->tls_get_addr_fd->elf)
sec->has_tls_reloc = 1;
else if (htab->tls_get_addr == NULL
&& !strncmp (h->root.root.string, ".__tls_get_addr", 15)
&& (h->root.root.string[15] == 0
|| h->root.root.string[15] == '@'))
{
htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
sec->has_tls_reloc = 1;
}
else if (htab->tls_get_addr_fd == NULL
&& !strncmp (h->root.root.string, "__tls_get_addr", 14)
&& (h->root.root.string[14] == 0
|| h->root.root.string[14] == '@'))
{
htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
sec->has_tls_reloc = 1;
}
}
break;
case R_PPC64_TPREL64:
tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
if (info->shared)
info->flags |= DF_STATIC_TLS;
goto dotlstoc;
case R_PPC64_DTPMOD64:
if (rel + 1 < rel_end
&& rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
&& rel[1].r_offset == rel->r_offset + 8)
tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
else
tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
goto dotlstoc;
case R_PPC64_DTPREL64:
tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
if (rel != relocs
&& rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
&& rel[-1].r_offset == rel->r_offset - 8)
Don't mark with TLS_DTPREL. */
goto dodyn;
dotlstoc:
sec->has_tls_reloc = 1;
if (h != NULL)
{
struct ppc_link_hash_entry *eh;
eh = (struct ppc_link_hash_entry *) h;
eh->tls_mask |= tls_type;
}
else
if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
rel->r_addend, tls_type))
return FALSE;
if (ppc64_elf_section_data (sec)->t_symndx == NULL)
{
bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
if (ppc64_elf_section_data (sec)->t_symndx == NULL)
return FALSE;
}
BFD_ASSERT (rel->r_offset % 8 == 0);
ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
-1 to indicate GD and -2 to indicate LD. */
if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
goto dodyn;
case R_PPC64_TPREL16:
case R_PPC64_TPREL16_LO:
case R_PPC64_TPREL16_HI:
case R_PPC64_TPREL16_HA:
case R_PPC64_TPREL16_DS:
case R_PPC64_TPREL16_LO_DS:
case R_PPC64_TPREL16_HIGHER:
case R_PPC64_TPREL16_HIGHERA:
case R_PPC64_TPREL16_HIGHEST:
case R_PPC64_TPREL16_HIGHESTA:
if (info->shared)
{
info->flags |= DF_STATIC_TLS;
goto dodyn;
}
break;
case R_PPC64_ADDR64:
if (opd_sym_map != NULL
&& rel + 1 < rel_end
&& ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
{
if (h != NULL)
{
if (h->root.root.string[0] == '.'
&& h->root.root.string[1] != 0
&& get_fdh ((struct ppc_link_hash_entry *) h, htab))
;
else
((struct ppc_link_hash_entry *) h)->is_func = 1;
}
else
{
asection *s;
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
r_symndx);
if (s == NULL)
return FALSE;
else if (s != sec)
opd_sym_map[rel->r_offset / 8] = s;
}
}
case R_PPC64_REL30:
case R_PPC64_REL32:
case R_PPC64_REL64:
case R_PPC64_ADDR14:
case R_PPC64_ADDR14_BRNTAKEN:
case R_PPC64_ADDR14_BRTAKEN:
case R_PPC64_ADDR16:
case R_PPC64_ADDR16_DS:
case R_PPC64_ADDR16_HA:
case R_PPC64_ADDR16_HI:
case R_PPC64_ADDR16_HIGHER:
case R_PPC64_ADDR16_HIGHERA:
case R_PPC64_ADDR16_HIGHEST:
case R_PPC64_ADDR16_HIGHESTA:
case R_PPC64_ADDR16_LO:
case R_PPC64_ADDR16_LO_DS:
case R_PPC64_ADDR24:
case R_PPC64_ADDR32:
case R_PPC64_UADDR16:
case R_PPC64_UADDR32:
case R_PPC64_UADDR64:
case R_PPC64_TOC:
if (h != NULL && !info->shared)
h->non_got_ref = 1;
if (NO_OPD_RELOCS && opd_sym_map != NULL)
break;
against a global symbol, or a non PC relative reloc
against a local symbol, then we need to copy the reloc
into the shared library. However, if we are linking with
-Bsymbolic, we do not need to copy a reloc against a
global symbol which is defined in an object we are
including in the link (i.e., DEF_REGULAR is set). At
this point we have not seen all the input files, so it is
possible that DEF_REGULAR is not set now but will be set
later (it is never cleared). In case of a weak definition,
DEF_REGULAR may be cleared later by a strong definition in
a shared library. We account for that possibility below by
storing information in the dyn_relocs field of the hash
table entry. A similar situation occurs when creating
shared libraries and symbol visibility changes render the
symbol local.
If on the other hand, we are creating an executable, we
may need to keep relocations for symbols satisfied by a
dynamic library if we manage to avoid copy relocs for the
symbol. */
dodyn:
if ((info->shared
&& (MUST_BE_DYN_RELOC (r_type)
|| (h != NULL
&& (! info->symbolic
|| h->root.type == bfd_link_hash_defweak
|| !h->def_regular))))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
&& h != NULL
&& (h->root.type == bfd_link_hash_defweak
|| !h->def_regular)))
{
struct ppc_dyn_relocs *p;
struct ppc_dyn_relocs **head;
Create a reloc section in dynobj and make room for
this reloc. */
if (sreloc == NULL)
{
const char *name;
bfd *dynobj;
name = (bfd_elf_string_from_elf_section
(abfd,
elf_elfheader (abfd)->e_shstrndx,
elf_section_data (sec)->rel_hdr.sh_name));
if (name == NULL)
return FALSE;
if (strncmp (name, ".rela", 5) != 0
|| strcmp (bfd_get_section_name (abfd, sec),
name + 5) != 0)
{
(*_bfd_error_handler)
(_("%B: bad relocation section name `%s\'"),
abfd, name);
bfd_set_error (bfd_error_bad_value);
}
dynobj = htab->elf.dynobj;
sreloc = bfd_get_section_by_name (dynobj, name);
if (sreloc == NULL)
{
flagword flags;
flags = (SEC_HAS_CONTENTS | SEC_READONLY
| SEC_IN_MEMORY | SEC_LINKER_CREATED
| SEC_ALLOC | SEC_LOAD);
sreloc = bfd_make_section_with_flags (dynobj,
name,
flags);
if (sreloc == NULL
|| ! bfd_set_section_alignment (dynobj, sreloc, 3))
return FALSE;
}
elf_section_data (sec)->sreloc = sreloc;
}
relocations we need for this symbol. */
if (h != NULL)
{
head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
}
else
{
We really need local syms available to do this
easily. Oh well. */
asection *s;
void *vpp;
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
sec, r_symndx);
if (s == NULL)
return FALSE;
vpp = &elf_section_data (s)->local_dynrel;
head = (struct ppc_dyn_relocs **) vpp;
}
p = *head;
if (p == NULL || p->sec != sec)
{
p = bfd_alloc (htab->elf.dynobj, sizeof *p);
if (p == NULL)
return FALSE;
p->next = *head;
*head = p;
p->sec = sec;
p->count = 0;
p->pc_count = 0;
}
p->count += 1;
if (!MUST_BE_DYN_RELOC (r_type))
p->pc_count += 1;
}
break;
default:
break;
}
}
return TRUE;
}
of the code entry point, and its section. */
static bfd_vma
opd_entry_value (asection *opd_sec,
bfd_vma offset,
asection **code_sec,
bfd_vma *code_off)
{
bfd *opd_bfd = opd_sec->owner;
Elf_Internal_Rela *relocs;
Elf_Internal_Rela *lo, *hi, *look;
bfd_vma val;
if (opd_sec->reloc_count == 0)
{
bfd_vma val;
if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
return (bfd_vma) -1;
if (code_sec != NULL)
{
asection *sec, *likely = NULL;
for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
if (sec->vma <= val
&& (sec->flags & SEC_LOAD) != 0
&& (sec->flags & SEC_ALLOC) != 0)
likely = sec;
if (likely != NULL)
{
*code_sec = likely;
if (code_off != NULL)
*code_off = val - likely->vma;
}
}
return val;
}
relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
if (relocs == NULL)
relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
lo = relocs;
BFD_ASSERT (lo != NULL);
hi = lo + opd_sec->reloc_count - 1;
val = (bfd_vma) -1;
while (lo < hi)
{
look = lo + (hi - lo) / 2;
if (look->r_offset < offset)
lo = look + 1;
else if (look->r_offset > offset)
hi = look;
else
{
Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
&& ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
{
unsigned long symndx = ELF64_R_SYM (look->r_info);
asection *sec;
if (symndx < symtab_hdr->sh_info)
{
Elf_Internal_Sym *sym;
sym = (Elf_Internal_Sym *) symtab_hdr->contents;
if (sym == NULL)
{
sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
symtab_hdr->sh_info,
0, NULL, NULL, NULL);
if (sym == NULL)
break;
symtab_hdr->contents = (bfd_byte *) sym;
}
sym += symndx;
val = sym->st_value;
sec = NULL;
if ((sym->st_shndx != SHN_UNDEF
&& sym->st_shndx < SHN_LORESERVE)
|| sym->st_shndx > SHN_HIRESERVE)
sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
}
else
{
struct elf_link_hash_entry **sym_hashes;
struct elf_link_hash_entry *rh;
sym_hashes = elf_sym_hashes (opd_bfd);
rh = sym_hashes[symndx - symtab_hdr->sh_info];
while (rh->root.type == bfd_link_hash_indirect
|| rh->root.type == bfd_link_hash_warning)
rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
BFD_ASSERT (rh->root.type == bfd_link_hash_defined
|| rh->root.type == bfd_link_hash_defweak);
val = rh->root.u.def.value;
sec = rh->root.u.def.section;
}
val += look->r_addend;
if (code_off != NULL)
*code_off = val;
if (code_sec != NULL)
*code_sec = sec;
if (sec != NULL && sec->output_section != NULL)
val += sec->output_section->vma + sec->output_offset;
}
break;
}
}
return val;
}
building shared libraries, we must assume that any visible symbol is
referenced. */
static bfd_boolean
ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
{
struct bfd_link_info *info = (struct bfd_link_info *) inf;
struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
if (eh->elf.root.type == bfd_link_hash_warning)
eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
if (eh->oh != NULL
&& eh->oh->is_func_descriptor
&& (eh->oh->elf.root.type == bfd_link_hash_defined
|| eh->oh->elf.root.type == bfd_link_hash_defweak))
eh = eh->oh;
if ((eh->elf.root.type == bfd_link_hash_defined
|| eh->elf.root.type == bfd_link_hash_defweak)
&& (eh->elf.ref_dynamic
|| (!info->executable
&& eh->elf.def_regular
&& ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
&& ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
{
asection *code_sec;
eh->elf.root.u.def.section->flags |= SEC_KEEP;
function code sym section to be marked. */
if (eh->is_func_descriptor
&& (eh->oh->elf.root.type == bfd_link_hash_defined
|| eh->oh->elf.root.type == bfd_link_hash_defweak))
eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
else if (get_opd_info (eh->elf.root.u.def.section) != NULL
&& opd_entry_value (eh->elf.root.u.def.section,
eh->elf.root.u.def.value,
&code_sec, NULL) != (bfd_vma) -1)
code_sec->flags |= SEC_KEEP;
}
return TRUE;
}
relocation. */
static asection *
ppc64_elf_gc_mark_hook (asection *sec,
struct bfd_link_info *info,
Elf_Internal_Rela *rel,
struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym)
{
asection *rsec;
if (info->gc_sym_list != NULL)
{
struct ppc_link_hash_table *htab = ppc_hash_table (info);
struct bfd_sym_chain *sym = info->gc_sym_list;
info->gc_sym_list = NULL;
for (; sym != NULL; sym = sym->next)
{
struct ppc_link_hash_entry *eh;
eh = (struct ppc_link_hash_entry *)
elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
if (eh == NULL)
continue;
if (eh->elf.root.type != bfd_link_hash_defined
&& eh->elf.root.type != bfd_link_hash_defweak)
continue;
if (eh->is_func_descriptor
&& (eh->oh->elf.root.type == bfd_link_hash_defined
|| eh->oh->elf.root.type == bfd_link_hash_defweak))
rsec = eh->oh->elf.root.u.def.section;
else if (get_opd_info (eh->elf.root.u.def.section) != NULL
&& opd_entry_value (eh->elf.root.u.def.section,
eh->elf.root.u.def.value,
&rsec, NULL) != (bfd_vma) -1)
;
else
continue;
if (!rsec->gc_mark)
_bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
rsec = eh->elf.root.u.def.section;
if (!rsec->gc_mark)
_bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
}
}
function sections, as all functions are referenced in .opd. */
rsec = NULL;
if (get_opd_info (sec) != NULL)
return rsec;
if (h != NULL)
{
enum elf_ppc64_reloc_type r_type;
struct ppc_link_hash_entry *eh;
r_type = ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
case R_PPC64_GNU_VTINHERIT:
case R_PPC64_GNU_VTENTRY:
break;
default:
switch (h->root.type)
{
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
eh = (struct ppc_link_hash_entry *) h;
if (eh->oh != NULL
&& eh->oh->is_func_descriptor
&& (eh->oh->elf.root.type == bfd_link_hash_defined
|| eh->oh->elf.root.type == bfd_link_hash_defweak))
eh = eh->oh;
function code sym section to be marked. */
if (eh->is_func_descriptor
&& (eh->oh->elf.root.type == bfd_link_hash_defined
|| eh->oh->elf.root.type == bfd_link_hash_defweak))
{
if (!eh->elf.root.u.def.section->gc_mark)
_bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
ppc64_elf_gc_mark_hook);
rsec = eh->oh->elf.root.u.def.section;
}
else if (get_opd_info (eh->elf.root.u.def.section) != NULL
&& opd_entry_value (eh->elf.root.u.def.section,
eh->elf.root.u.def.value,
&rsec, NULL) != (bfd_vma) -1)
{
if (!eh->elf.root.u.def.section->gc_mark)
_bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
ppc64_elf_gc_mark_hook);
}
else
rsec = h->root.u.def.section;
break;
case bfd_link_hash_common:
rsec = h->root.u.c.p->section;
break;
default:
break;
}
}
}
else
{
asection **opd_sym_section;
rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
opd_sym_section = get_opd_info (rsec);
if (opd_sym_section != NULL)
{
if (!rsec->gc_mark)
_bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
}
}
return rsec;
}
section being removed. */
static bfd_boolean
ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
asection *sec, const Elf_Internal_Rela *relocs)
{
struct ppc_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
struct got_entry **local_got_ents;
const Elf_Internal_Rela *rel, *relend;
if ((sec->flags & SEC_ALLOC) == 0)
return TRUE;
elf_section_data (sec)->local_dynrel = NULL;
htab = ppc_hash_table (info);
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
local_got_ents = elf_local_got_ents (abfd);
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; rel++)
{
unsigned long r_symndx;
enum elf_ppc64_reloc_type r_type;
struct elf_link_hash_entry *h = NULL;
char tls_type = 0;
r_symndx = ELF64_R_SYM (rel->r_info);
r_type = ELF64_R_TYPE (rel->r_info);
if (r_symndx >= symtab_hdr->sh_info)
{
struct ppc_link_hash_entry *eh;
struct ppc_dyn_relocs **pp;
struct ppc_dyn_relocs *p;
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
eh = (struct ppc_link_hash_entry *) h;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
if (p->sec == sec)
{
*pp = p->next;
break;
}
}
switch (r_type)
{
case R_PPC64_GOT_TLSLD16:
case R_PPC64_GOT_TLSLD16_LO:
case R_PPC64_GOT_TLSLD16_HI:
case R_PPC64_GOT_TLSLD16_HA:
ppc64_tlsld_got (abfd)->refcount -= 1;
tls_type = TLS_TLS | TLS_LD;
goto dogot;
case R_PPC64_GOT_TLSGD16:
case R_PPC64_GOT_TLSGD16_LO:
case R_PPC64_GOT_TLSGD16_HI:
case R_PPC64_GOT_TLSGD16_HA:
tls_type = TLS_TLS | TLS_GD;
goto dogot;
case R_PPC64_GOT_TPREL16_DS:
case R_PPC64_GOT_TPREL16_LO_DS:
case R_PPC64_GOT_TPREL16_HI:
case R_PPC64_GOT_TPREL16_HA:
tls_type = TLS_TLS | TLS_TPREL;
goto dogot;
case R_PPC64_GOT_DTPREL16_DS:
case R_PPC64_GOT_DTPREL16_LO_DS:
case R_PPC64_GOT_DTPREL16_HI:
case R_PPC64_GOT_DTPREL16_HA:
tls_type = TLS_TLS | TLS_DTPREL;
goto dogot;
case R_PPC64_GOT16:
case R_PPC64_GOT16_DS:
case R_PPC64_GOT16_HA:
case R_PPC64_GOT16_HI:
case R_PPC64_GOT16_LO:
case R_PPC64_GOT16_LO_DS:
dogot:
{
struct got_entry *ent;
if (h != NULL)
ent = h->got.glist;
else
ent = local_got_ents[r_symndx];
for (; ent != NULL; ent = ent->next)
if (ent->addend == rel->r_addend
&& ent->owner == abfd
&& ent->tls_type == tls_type)
break;
if (ent == NULL)
abort ();
if (ent->got.refcount > 0)
ent->got.refcount -= 1;
}
break;
case R_PPC64_PLT16_HA:
case R_PPC64_PLT16_HI:
case R_PPC64_PLT16_LO:
case R_PPC64_PLT32:
case R_PPC64_PLT64:
case R_PPC64_REL14:
case R_PPC64_REL14_BRNTAKEN:
case R_PPC64_REL14_BRTAKEN:
case R_PPC64_REL24:
if (h != NULL)
{
struct plt_entry *ent;
for (ent = h->plt.plist; ent != NULL; ent = ent->next)
if (ent->addend == rel->r_addend)
break;
if (ent == NULL)
abort ();
if (ent->plt.refcount > 0)
ent->plt.refcount -= 1;
}
break;
default:
break;
}
}
return TRUE;
}
#define SFPR_MAX (218*4)
struct sfpr_def_parms
{
const char name[12];
unsigned char lo, hi;
bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
};
static unsigned int
sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
{
struct ppc_link_hash_table *htab = ppc_hash_table (info);
unsigned int i;
size_t len = strlen (parm->name);
bfd_boolean writing = FALSE;
char sym[16];
memcpy (sym, parm->name, len);
sym[len + 2] = 0;
for (i = parm->lo; i <= parm->hi; i++)
{
struct elf_link_hash_entry *h;
sym[len + 0] = i / 10 + '0';
sym[len + 1] = i % 10 + '0';
h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
if (h != NULL
&& !h->def_regular)
{
h->root.type = bfd_link_hash_defined;
h->root.u.def.section = htab->sfpr;
h->root.u.def.value = htab->sfpr->size;
h->type = STT_FUNC;
h->def_regular = 1;
_bfd_elf_link_hash_hide_symbol (info, h, TRUE);
writing = TRUE;
if (htab->sfpr->contents == NULL)
{
htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
if (htab->sfpr->contents == NULL)
return FALSE;
}
}
if (writing)
{
bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
if (i != parm->hi)
p = (*parm->write_ent) (htab->elf.dynobj, p, i);
else
p = (*parm->write_tail) (htab->elf.dynobj, p, i);
htab->sfpr->size = p - htab->sfpr->contents;
}
}
return TRUE;
}
static bfd_byte *
savegpr0 (bfd *abfd, bfd_byte *p, int r)
{
bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
return p + 4;
}
static bfd_byte *
savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
{
p = savegpr0 (abfd, p, r);
bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
p = p + 4;
bfd_put_32 (abfd, BLR, p);
return p + 4;
}
static bfd_byte *
restgpr0 (bfd *abfd, bfd_byte *p, int r)
{
bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
return p + 4;
}
static bfd_byte *
restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
{
bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
p = p + 4;
p = restgpr0 (abfd, p, r);
bfd_put_32 (abfd, MTLR_R0, p);
p = p + 4;
if (r == 29)
{
p = restgpr0 (abfd, p, 30);
p = restgpr0 (abfd, p, 31);
}
bfd_put_32 (abfd, BLR, p);
return p + 4;
}
static bfd_byte *
savegpr1 (bfd *abfd, bfd_byte *p, int r)
{
bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
return p + 4;
}
static bfd_byte *
savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
{
p = savegpr1 (abfd, p, r);
bfd_put_32 (abfd, BLR, p);
return p + 4;
}
static bfd_byte *
restgpr1 (bfd *abfd, bfd_byte *p, int r)
{
bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
return p + 4;
}
static bfd_byte *
restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
{
p = restgpr1 (abfd, p, r);
bfd_put_32 (abfd, BLR, p);
return p + 4;
}
static bfd_byte *
savefpr (bfd *abfd, bfd_byte *p, int r)
{
bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
return p + 4;
}
static bfd_byte *
savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
{
p = savefpr (abfd, p, r);
bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
p = p + 4;
bfd_put_32 (abfd, BLR, p);
return p + 4;
}
static bfd_byte *
restfpr (bfd *abfd, bfd_byte *p, int r)
{
bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
return p + 4;
}
static bfd_byte *
restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
{
bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
p = p + 4;
p = restfpr (abfd, p, r);
bfd_put_32 (abfd, MTLR_R0, p);
p = p + 4;
if (r == 29)
{
p = restfpr (abfd, p, 30);
p = restfpr (abfd, p, 31);
}
bfd_put_32 (abfd, BLR, p);
return p + 4;
}
static bfd_byte *
savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
{
p = savefpr (abfd, p, r);
bfd_put_32 (abfd, BLR, p);
return p + 4;
}
static bfd_byte *
restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
{
p = restfpr (abfd, p, r);
bfd_put_32 (abfd, BLR, p);
return p + 4;
}
static bfd_byte *
savevr (bfd *abfd, bfd_byte *p, int r)
{
bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
p = p + 4;
bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
return p + 4;
}
static bfd_byte *
savevr_tail (bfd *abfd, bfd_byte *p, int r)
{
p = savevr (abfd, p, r);
bfd_put_32 (abfd, BLR, p);
return p + 4;
}
static bfd_byte *
restvr (bfd *abfd, bfd_byte *p, int r)
{
bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
p = p + 4;
bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
return p + 4;
}
static bfd_byte *
restvr_tail (bfd *abfd, bfd_byte *p, int r)
{
p = restvr (abfd, p, r);
bfd_put_32 (abfd, BLR, p);
return p + 4;
}
information on function code symbol entries to their corresponding
function descriptor symbol entries. */
static bfd_boolean
func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
{
struct bfd_link_info *info;
struct ppc_link_hash_table *htab;
struct plt_entry *ent;
struct ppc_link_hash_entry *fh;
struct ppc_link_hash_entry *fdh;
bfd_boolean force_local;
fh = (struct ppc_link_hash_entry *) h;
if (fh->elf.root.type == bfd_link_hash_indirect)
return TRUE;
if (fh->elf.root.type == bfd_link_hash_warning)
fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
info = inf;
htab = ppc_hash_table (info);
in the function descriptor, if we have one in a regular object.
This is to satisfy cases like ".quad .foo". Calls to functions
in dynamic objects are handled elsewhere. */
if (fh->elf.root.type == bfd_link_hash_undefweak
&& fh->was_undefined
&& (fh->oh->elf.root.type == bfd_link_hash_defined
|| fh->oh->elf.root.type == bfd_link_hash_defweak)
&& get_opd_info (fh->oh->elf.root.u.def.section) != NULL
&& opd_entry_value (fh->oh->elf.root.u.def.section,
fh->oh->elf.root.u.def.value,
&fh->elf.root.u.def.section,
&fh->elf.root.u.def.value) != (bfd_vma) -1)
{
fh->elf.root.type = fh->oh->elf.root.type;
fh->elf.forced_local = 1;
}
information to the function descriptor symbol. */
if (!fh->is_func)
return TRUE;
for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
if (ent->plt.refcount > 0)
break;
if (ent == NULL
|| fh->elf.root.root.string[0] != '.'
|| fh->elf.root.root.string[1] == '\0')
return TRUE;
as undefined if necessary. */
fdh = get_fdh (fh, htab);
if (fdh != NULL)
while (fdh->elf.root.type == bfd_link_hash_indirect
|| fdh->elf.root.type == bfd_link_hash_warning)
fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
if (fdh == NULL
&& info->shared
&& (fh->elf.root.type == bfd_link_hash_undefined
|| fh->elf.root.type == bfd_link_hash_undefweak))
{
fdh = make_fdh (info, fh);
if (fdh == NULL)
return FALSE;
}
code symbol is strong undefined, make the fake sym the same.
If the function code symbol is defined, then force the fake
descriptor local; We can't support overriding of symbols in a
shared library on a fake descriptor. */
if (fdh != NULL
&& fdh->fake
&& fdh->elf.root.type == bfd_link_hash_undefweak)
{
if (fh->elf.root.type == bfd_link_hash_undefined)
{
fdh->elf.root.type = bfd_link_hash_undefined;
bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
}
else if (fh->elf.root.type == bfd_link_hash_defined
|| fh->elf.root.type == bfd_link_hash_defweak)
{
_bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
}
}
if (fdh != NULL
&& !fdh->elf.forced_local
&& (info->shared
|| fdh->elf.def_dynamic
|| fdh->elf.ref_dynamic
|| (fdh->elf.root.type == bfd_link_hash_undefweak
&& ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
{
if (fdh->elf.dynindx == -1)
if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
return FALSE;
fdh->elf.ref_regular |= fh->elf.ref_regular;
fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
fdh->elf.non_got_ref |= fh->elf.non_got_ref;
if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
{
move_plt_plist (fh, fdh);
fdh->elf.needs_plt = 1;
}
fdh->is_func_descriptor = 1;
fdh->oh = fh;
fh->oh = fdh;
}
function code sym info. Any function code syms for which we
don't have a definition in a regular file, we force local.
This prevents a shared library from exporting syms that have
been imported from another library. Function code syms that
are really in the library we must leave global to prevent the
linker dragging in a definition from a static library. */
force_local = (!fh->elf.def_regular
|| fdh == NULL
|| !fdh->elf.def_regular
|| fdh->elf.forced_local);
_bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
return TRUE;
}
this hook to a) provide some gcc support functions, and b) transfer
dynamic linking information gathered so far on function code symbol
entries, to their corresponding function descriptor symbol entries. */
static bfd_boolean
ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
unsigned int i;
const struct sfpr_def_parms funcs[] =
{
{ "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
{ "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
{ "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
{ "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
{ "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
{ "_savefpr_", 14, 31, savefpr, savefpr0_tail },
{ "_restfpr_", 14, 29, restfpr, restfpr0_tail },
{ "_restfpr_", 30, 31, restfpr, restfpr0_tail },
{ "._savef", 14, 31, savefpr, savefpr1_tail },
{ "._restf", 14, 31, restfpr, restfpr1_tail },
{ "_savevr_", 20, 31, savevr, savevr_tail },
{ "_restvr_", 20, 31, restvr, restvr_tail }
};
htab = ppc_hash_table (info);
if (htab->sfpr == NULL)
return TRUE;
htab->sfpr->size = 0;
for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
if (!sfpr_define (info, &funcs[i]))
return FALSE;
elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
if (htab->sfpr->size == 0)
htab->sfpr->flags |= SEC_EXCLUDE;
return TRUE;
}
regular object. The current definition is in some section of the
dynamic object, but we're not including those sections. We have to
change the definition to something the rest of the link can
understand. */
static bfd_boolean
ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
struct elf_link_hash_entry *h)
{
struct ppc_link_hash_table *htab;
asection *s;
unsigned int power_of_two;
htab = ppc_hash_table (info);
if (h->type == STT_FUNC
|| h->needs_plt)
{
won't need a .plt entry. */
struct plt_entry *ent;
for (ent = h->plt.plist; ent != NULL; ent = ent->next)
if (ent->plt.refcount > 0)
break;
if (ent == NULL
|| SYMBOL_CALLS_LOCAL (info, h)
|| (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
&& h->root.type == bfd_link_hash_undefweak))
{
h->plt.plist = NULL;
h->needs_plt = 0;
}
}
else
h->plt.plist = NULL;
processor independent code will have arranged for us to see the
real definition first, and we can just use the same value. */
if (h->u.weakdef != NULL)
{
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
h->root.u.def.section = h->u.weakdef->root.u.def.section;
h->root.u.def.value = h->u.weakdef->root.u.def.value;
if (ELIMINATE_COPY_RELOCS)
h->non_got_ref = h->u.weakdef->non_got_ref;
return TRUE;
}
only references to the symbol are via the global offset table.
For such cases we need not do anything here; the relocations will
be handled correctly by relocate_section. */
if (info->shared)
return TRUE;
GOT, we don't need to generate a copy reloc. */
if (!h->non_got_ref)
return TRUE;
if (ELIMINATE_COPY_RELOCS)
{
struct ppc_link_hash_entry * eh;
struct ppc_dyn_relocs *p;
eh = (struct ppc_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
s = p->sec->output_section;
if (s != NULL && (s->flags & SEC_READONLY) != 0)
break;
}
we'll be keeping the dynamic relocs and avoiding the copy reloc. */
if (p == NULL)
{
h->non_got_ref = 0;
return TRUE;
}
}
if (h->plt.plist != NULL)
{
of gcc out there that improperly (for this ABI) put initialized
function pointers, vtable refs and suchlike in read-only
sections. Allow them to proceed, but warn that this might
break at runtime. */
(*_bfd_error_handler)
(_("copy reloc against `%s' requires lazy plt linking; "
"avoid setting LD_BIND_NOW=1 or upgrade gcc"),
h->root.root.string);
}
is not a function. */
if (h->size == 0)
{
(*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
h->root.root.string);
return TRUE;
}
become part of the .bss section of the executable. There will be
an entry for this symbol in the .dynsym section. The dynamic
object will contain position independent code, so all references
from the dynamic object to this symbol will go through the global
offset table. The dynamic linker will use the .dynsym entry to
determine the address it must put in the global offset table, so
both the dynamic object and the regular object will refer to the
same memory location for the variable. */
to copy the initial value out of the dynamic object and into the
runtime process image. We need to remember the offset into the
.rela.bss section we are going to use. */
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
{
htab->relbss->size += sizeof (Elf64_External_Rela);
h->needs_copy = 1;
}
have no idea how ELF linkers handle this. */
power_of_two = bfd_log2 (h->size);
if (power_of_two > 4)
power_of_two = 4;
s = htab->dynbss;
s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
{
if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
return FALSE;
}
h->root.u.def.section = s;
h->root.u.def.value = s->size;
s->size += h->size;
return TRUE;
}
sym and the descriptor. */
static void
ppc64_elf_hide_symbol (struct bfd_link_info *info,
struct elf_link_hash_entry *h,
bfd_boolean force_local)
{
struct ppc_link_hash_entry *eh;
_bfd_elf_link_hash_hide_symbol (info, h, force_local);
eh = (struct ppc_link_hash_entry *) h;
if (eh->is_func_descriptor)
{
struct ppc_link_hash_entry *fh = eh->oh;
if (fh == NULL)
{
const char *p, *q;
struct ppc_link_hash_table *htab;
char save;
systems which do not have alloca the version in libiberty
calls xmalloc, which might cause the program to crash
when it runs out of memory. This function doesn't have a
return status, so there's no way to gracefully return an
error. So cheat. We know that string[-1] can be safely
accessed; It's either a string in an ELF string table,
or allocated in an objalloc structure. */
p = eh->elf.root.root.string - 1;
save = *p;
*(char *) p = '.';
htab = ppc_hash_table (info);
fh = (struct ppc_link_hash_entry *)
elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
*(char *) p = save;
looking for was allocated immediately before this string,
then we overwrote the string terminator. That's the only
reason the lookup should fail. */
if (fh == NULL)
{
q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
while (q >= eh->elf.root.root.string && *q == *p)
--q, --p;
if (q < eh->elf.root.root.string && *p == '.')
fh = (struct ppc_link_hash_entry *)
elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
}
if (fh != NULL)
{
eh->oh = fh;
fh->oh = eh;
}
}
if (fh != NULL)
_bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
}
}
static bfd_boolean
get_sym_h (struct elf_link_hash_entry **hp,
Elf_Internal_Sym **symp,
asection **symsecp,
char **tls_maskp,
Elf_Internal_Sym **locsymsp,
unsigned long r_symndx,
bfd *ibfd)
{
Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
if (r_symndx >= symtab_hdr->sh_info)
{
struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
struct elf_link_hash_entry *h;
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if (hp != NULL)
*hp = h;
if (symp != NULL)
*symp = NULL;
if (symsecp != NULL)
{
asection *symsec = NULL;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
symsec = h->root.u.def.section;
*symsecp = symsec;
}
if (tls_maskp != NULL)
{
struct ppc_link_hash_entry *eh;
eh = (struct ppc_link_hash_entry *) h;
*tls_maskp = &eh->tls_mask;
}
}
else
{
Elf_Internal_Sym *sym;
Elf_Internal_Sym *locsyms = *locsymsp;
if (locsyms == NULL)
{
locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
if (locsyms == NULL)
locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
symtab_hdr->sh_info,
0, NULL, NULL, NULL);
if (locsyms == NULL)
return FALSE;
*locsymsp = locsyms;
}
sym = locsyms + r_symndx;
if (hp != NULL)
*hp = NULL;
if (symp != NULL)
*symp = sym;
if (symsecp != NULL)
{
asection *symsec = NULL;
if ((sym->st_shndx != SHN_UNDEF
&& sym->st_shndx < SHN_LORESERVE)
|| sym->st_shndx > SHN_HIRESERVE)
symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
*symsecp = symsec;
}
if (tls_maskp != NULL)
{
struct got_entry **lgot_ents;
char *tls_mask;
tls_mask = NULL;
lgot_ents = elf_local_got_ents (ibfd);
if (lgot_ents != NULL)
{
char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
tls_mask = &lgot_masks[r_symndx];
}
*tls_maskp = tls_mask;
}
}
return TRUE;
}
error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
type suitable for optimization, and 1 otherwise. */
static int
get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
Elf_Internal_Sym **locsymsp,
const Elf_Internal_Rela *rel, bfd *ibfd)
{
unsigned long r_symndx;
int next_r;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
asection *sec;
bfd_vma off;
r_symndx = ELF64_R_SYM (rel->r_info);
if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
return 0;
if ((*tls_maskp != NULL && **tls_maskp != 0)
|| sec == NULL
|| ppc64_elf_section_data (sec)->t_symndx == NULL)
return 1;
if (h != NULL)
{
BFD_ASSERT (h->root.type == bfd_link_hash_defined);
off = h->root.u.def.value;
}
else
off = sym->st_value;
off += rel->r_addend;
BFD_ASSERT (off % 8 == 0);
r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
return 0;
if (toc_symndx != NULL)
*toc_symndx = r_symndx;
if ((h == NULL
|| ((h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
&& !h->def_dynamic))
&& (next_r == -1 || next_r == -2))
return 1 - next_r;
return 1;
}
code for the old ABI, these will already have been done. */
static bfd_boolean
adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
{
struct ppc_link_hash_entry *eh;
asection *sym_sec;
long *opd_adjust;
if (h->root.type == bfd_link_hash_indirect)
return TRUE;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if (h->root.type != bfd_link_hash_defined
&& h->root.type != bfd_link_hash_defweak)
return TRUE;
eh = (struct ppc_link_hash_entry *) h;
if (eh->adjust_done)
return TRUE;
sym_sec = eh->elf.root.u.def.section;
opd_adjust = get_opd_info (sym_sec);
if (opd_adjust != NULL)
{
long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
if (adjust == -1)
{
asection *dsec = ppc64_elf_tdata (sym_sec->owner)->u.deleted_section;
if (dsec == NULL)
{
for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
if (elf_discarded_section (dsec))
{
ppc64_elf_tdata (sym_sec->owner)->u.deleted_section = dsec;
break;
}
}
eh->elf.root.u.def.value = 0;
eh->elf.root.u.def.section = dsec;
}
else
eh->elf.root.u.def.value += adjust;
eh->adjust_done = 1;
}
return TRUE;
}
R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
have already been determined. */
static bfd_boolean
dec_dynrel_count (bfd_vma r_info,
asection *sec,
struct bfd_link_info *info,
Elf_Internal_Sym **local_syms,
struct elf_link_hash_entry *h,
asection *sym_sec)
{
enum elf_ppc64_reloc_type r_type;
struct ppc_dyn_relocs *p;
struct ppc_dyn_relocs **pp;
should be kept in sync with the code in check_relocs. */
r_type = ELF64_R_TYPE (r_info);
switch (r_type)
{
default:
return TRUE;
case R_PPC64_TPREL16:
case R_PPC64_TPREL16_LO:
case R_PPC64_TPREL16_HI:
case R_PPC64_TPREL16_HA:
case R_PPC64_TPREL16_DS:
case R_PPC64_TPREL16_LO_DS:
case R_PPC64_TPREL16_HIGHER:
case R_PPC64_TPREL16_HIGHERA:
case R_PPC64_TPREL16_HIGHEST:
case R_PPC64_TPREL16_HIGHESTA:
if (!info->shared)
return TRUE;
case R_PPC64_TPREL64:
case R_PPC64_DTPMOD64:
case R_PPC64_DTPREL64:
case R_PPC64_ADDR64:
case R_PPC64_REL30:
case R_PPC64_REL32:
case R_PPC64_REL64:
case R_PPC64_ADDR14:
case R_PPC64_ADDR14_BRNTAKEN:
case R_PPC64_ADDR14_BRTAKEN:
case R_PPC64_ADDR16:
case R_PPC64_ADDR16_DS:
case R_PPC64_ADDR16_HA:
case R_PPC64_ADDR16_HI:
case R_PPC64_ADDR16_HIGHER:
case R_PPC64_ADDR16_HIGHERA:
case R_PPC64_ADDR16_HIGHEST:
case R_PPC64_ADDR16_HIGHESTA:
case R_PPC64_ADDR16_LO:
case R_PPC64_ADDR16_LO_DS:
case R_PPC64_ADDR24:
case R_PPC64_ADDR32:
case R_PPC64_UADDR16:
case R_PPC64_UADDR32:
case R_PPC64_UADDR64:
case R_PPC64_TOC:
break;
}
if (local_syms != NULL)
{
unsigned long r_symndx;
Elf_Internal_Sym *sym;
bfd *ibfd = sec->owner;
r_symndx = ELF64_R_SYM (r_info);
if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
return FALSE;
}
if ((info->shared
&& (MUST_BE_DYN_RELOC (r_type)
|| (h != NULL
&& (!info->symbolic
|| h->root.type == bfd_link_hash_defweak
|| !h->def_regular))))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
&& h != NULL
&& (h->root.type == bfd_link_hash_defweak
|| !h->def_regular)))
;
else
return TRUE;
if (h != NULL)
pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
else
{
if (sym_sec != NULL)
{
void *vpp = &elf_section_data (sym_sec)->local_dynrel;
pp = (struct ppc_dyn_relocs **) vpp;
}
else
{
void *vpp = &elf_section_data (sec)->local_dynrel;
pp = (struct ppc_dyn_relocs **) vpp;
}
with local syms for a given section. Don't report a dynreloc
miscount. */
if (*pp == NULL)
return TRUE;
}
while ((p = *pp) != NULL)
{
if (p->sec == sec)
{
if (!MUST_BE_DYN_RELOC (r_type))
p->pc_count -= 1;
p->count -= 1;
if (p->count == 0)
*pp = p->next;
return TRUE;
}
pp = &p->next;
}
(*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
sec->owner, sec);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
only remove those associated with functions in discarded link-once
sections, or weakly defined functions that have been overridden. It
would be possible to remove many more entries for statically linked
applications. */
bfd_boolean
ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
bfd_boolean no_opd_opt,
bfd_boolean non_overlapping)
{
bfd *ibfd;
bfd_boolean some_edited = FALSE;
asection *need_pad = NULL;
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
{
asection *sec;
Elf_Internal_Rela *relstart, *rel, *relend;
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Sym *local_syms;
struct elf_link_hash_entry **sym_hashes;
bfd_vma offset;
bfd_size_type amt;
long *opd_adjust;
bfd_boolean need_edit, add_aux_fields;
bfd_size_type cnt_16b = 0;
sec = bfd_get_section_by_name (ibfd, ".opd");
if (sec == NULL || sec->size == 0)
continue;
amt = sec->size * sizeof (long) / 8;
opd_adjust = get_opd_info (sec);
if (opd_adjust == NULL)
{
or --just-symbols object. */
opd_adjust = bfd_alloc (obfd, amt);
if (opd_adjust == NULL)
return FALSE;
ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
}
memset (opd_adjust, 0, amt);
if (no_opd_opt)
continue;
if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
continue;
if (sec->output_section == bfd_abs_section_ptr)
continue;
if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
continue;
local_syms = NULL;
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (ibfd);
relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
info->keep_memory);
if (relstart == NULL)
return FALSE;
determine whether we need to edit this opd section. */
need_edit = FALSE;
need_pad = sec;
offset = 0;
relend = relstart + sec->reloc_count;
for (rel = relstart; rel < relend; )
{
enum elf_ppc64_reloc_type r_type;
unsigned long r_symndx;
asection *sym_sec;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
only interested in the reloc pointing to a function entry
point. */
if (rel->r_offset != offset
|| rel + 1 >= relend
|| (rel + 1)->r_offset != offset + 8)
{
"ld -r" we might have padding in the middle of .opd.
Also, there's nothing to prevent someone putting
something silly in .opd with the assembler. No .opd
optimization for them! */
broken_opd:
(*_bfd_error_handler)
(_("%B: .opd is not a regular array of opd entries"), ibfd);
need_edit = FALSE;
break;
}
if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
|| (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
{
(*_bfd_error_handler)
(_("%B: unexpected reloc type %u in .opd section"),
ibfd, r_type);
need_edit = FALSE;
break;
}
r_symndx = ELF64_R_SYM (rel->r_info);
if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
r_symndx, ibfd))
goto error_ret;
if (sym_sec == NULL || sym_sec->owner == NULL)
{
const char *sym_name;
if (h != NULL)
sym_name = h->root.root.string;
else
sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
sym_sec);
(*_bfd_error_handler)
(_("%B: undefined sym `%s' in .opd section"),
ibfd, sym_name);
need_edit = FALSE;
break;
}
current input bfd. If the symbol isn't defined in the
input bfd, then we won't be using the function in this
bfd; It must be defined in a linkonce section in another
bfd, or is weak. It's also possible that we are
discarding the function due to a linker script /DISCARD/,
which we test for via the output_section. */
if (sym_sec->owner != ibfd
|| sym_sec->output_section == bfd_abs_section_ptr)
need_edit = TRUE;
rel += 2;
if (rel == relend
|| (rel + 1 == relend && rel->r_offset == offset + 16))
{
if (sec->size == offset + 24)
{
need_pad = NULL;
break;
}
if (rel == relend && sec->size == offset + 16)
{
cnt_16b++;
break;
}
goto broken_opd;
}
if (rel->r_offset == offset + 24)
offset += 24;
else if (rel->r_offset != offset + 16)
goto broken_opd;
else if (rel + 1 < relend
&& ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
&& ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
{
offset += 16;
cnt_16b++;
}
else if (rel + 2 < relend
&& ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
&& ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
{
offset += 24;
rel += 1;
}
else
goto broken_opd;
}
add_aux_fields = non_overlapping && cnt_16b > 0;
if (need_edit || add_aux_fields)
{
Elf_Internal_Rela *write_rel;
bfd_byte *rptr, *wptr;
bfd_byte *new_contents = NULL;
bfd_boolean skip;
long opd_ent_size;
zeros as generated by gcc, but I suppose there's no reason
this will always be so. We might start putting something in
the third word of .opd entries. */
if ((sec->flags & SEC_IN_MEMORY) == 0)
{
bfd_byte *loc;
if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
{
if (loc != NULL)
free (loc);
error_ret:
if (local_syms != NULL
&& symtab_hdr->contents != (unsigned char *) local_syms)
free (local_syms);
if (elf_section_data (sec)->relocs != relstart)
free (relstart);
return FALSE;
}
sec->contents = loc;
sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
}
elf_section_data (sec)->relocs = relstart;
new_contents = sec->contents;
if (add_aux_fields)
{
new_contents = bfd_malloc (sec->size + cnt_16b * 8);
if (new_contents == NULL)
return FALSE;
need_pad = FALSE;
}
wptr = new_contents;
rptr = sec->contents;
write_rel = relstart;
skip = FALSE;
offset = 0;
opd_ent_size = 0;
for (rel = relstart; rel < relend; rel++)
{
unsigned long r_symndx;
asection *sym_sec;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
r_symndx = ELF64_R_SYM (rel->r_info);
if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
r_symndx, ibfd))
goto error_ret;
if (rel->r_offset == offset)
{
struct ppc_link_hash_entry *fdh = NULL;
16 byte (with fd_aux entry overlapped with next
fd_func). */
opd_ent_size = 24;
if ((rel + 2 == relend && sec->size == offset + 16)
|| (rel + 3 < relend
&& rel[2].r_offset == offset + 16
&& rel[3].r_offset == offset + 24
&& ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
&& ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
opd_ent_size = 16;
if (h != NULL
&& h->root.root.string[0] == '.')
{
fdh = get_fdh ((struct ppc_link_hash_entry *) h,
ppc_hash_table (info));
if (fdh != NULL
&& fdh->elf.root.type != bfd_link_hash_defined
&& fdh->elf.root.type != bfd_link_hash_defweak)
fdh = NULL;
}
skip = (sym_sec->owner != ibfd
|| sym_sec->output_section == bfd_abs_section_ptr);
if (skip)
{
if (fdh != NULL && sym_sec->owner == ibfd)
{
to be dropped. */
fdh->elf.root.u.def.value = 0;
fdh->elf.root.u.def.section = sym_sec;
}
opd_adjust[rel->r_offset / 8] = -1;
}
else
{
if (fdh != NULL)
{
this location in the opd section. It is
necessary to update the value here rather
than using an array of adjustments as we do
for local symbols, because various places
in the generic ELF code use the value
stored in u.def.value. */
fdh->elf.root.u.def.value = wptr - new_contents;
fdh->adjust_done = 1;
}
tweak them as they can be cached, but
we'd need to look through the local syms
for the function descriptor sym which we
don't have at the moment. So keep an
array of adjustments. */
opd_adjust[rel->r_offset / 8]
= (wptr - new_contents) - (rptr - sec->contents);
if (wptr != rptr)
memcpy (wptr, rptr, opd_ent_size);
wptr += opd_ent_size;
if (add_aux_fields && opd_ent_size == 16)
{
memset (wptr, '\0', 8);
wptr += 8;
}
}
rptr += opd_ent_size;
offset += opd_ent_size;
}
if (skip)
{
if (!NO_OPD_RELOCS
&& !info->relocatable
&& !dec_dynrel_count (rel->r_info, sec, info,
NULL, h, sym_sec))
goto error_ret;
}
else
{
new opd entries. While we're at it, we may as well
remove redundant relocs. */
rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
if (write_rel != rel)
memcpy (write_rel, rel, sizeof (*rel));
++write_rel;
}
}
sec->size = wptr - new_contents;
sec->reloc_count = write_rel - relstart;
if (add_aux_fields)
{
free (sec->contents);
sec->contents = new_contents;
}
elf_bfd_final_link if we are emitting relocs. */
elf_section_data (sec)->rel_hdr.sh_size
= sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
some_edited = TRUE;
}
else if (elf_section_data (sec)->relocs != relstart)
free (relstart);
if (local_syms != NULL
&& symtab_hdr->contents != (unsigned char *) local_syms)
{
if (!info->keep_memory)
free (local_syms);
else
symtab_hdr->contents = (unsigned char *) local_syms;
}
}
if (some_edited)
elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
long, add a 8 byte padding after it. */
if (need_pad != NULL && !info->relocatable)
{
bfd_byte *p;
if ((need_pad->flags & SEC_IN_MEMORY) == 0)
{
BFD_ASSERT (need_pad->size > 0);
p = bfd_malloc (need_pad->size + 8);
if (p == NULL)
return FALSE;
if (! bfd_get_section_contents (need_pad->owner, need_pad,
p, 0, need_pad->size))
return FALSE;
need_pad->contents = p;
need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
}
else
{
p = bfd_realloc (need_pad->contents, need_pad->size + 8);
if (p == NULL)
return FALSE;
need_pad->contents = p;
}
memset (need_pad->contents + need_pad->size, 0, 8);
need_pad->size += 8;
}
return TRUE;
}
asection *
ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
htab = ppc_hash_table (info);
if (htab->tls_get_addr != NULL)
{
struct ppc_link_hash_entry *h = htab->tls_get_addr;
while (h->elf.root.type == bfd_link_hash_indirect
|| h->elf.root.type == bfd_link_hash_warning)
h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
htab->tls_get_addr = h;
if (htab->tls_get_addr_fd == NULL
&& h->oh != NULL
&& h->oh->is_func_descriptor
&& (h->oh->elf.root.type == bfd_link_hash_defined
|| h->oh->elf.root.type == bfd_link_hash_defweak))
htab->tls_get_addr_fd = h->oh;
}
if (htab->tls_get_addr_fd != NULL)
{
struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
while (h->elf.root.type == bfd_link_hash_indirect
|| h->elf.root.type == bfd_link_hash_warning)
h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
htab->tls_get_addr_fd = h;
}
return _bfd_elf_tls_setup (obfd, info);
}
opportunities. The linker has been hacked (see ppc64elf.em) to do
a preliminary section layout so that we know the TLS segment
offsets. We can't optimize earlier because some optimizations need
to know the tp offset, and we need to optimize before allocating
dynamic relocations. */
bfd_boolean
ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
{
bfd *ibfd;
asection *sec;
struct ppc_link_hash_table *htab;
if (info->relocatable || info->shared)
return TRUE;
htab = ppc_hash_table (info);
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
{
Elf_Internal_Sym *locsyms = NULL;
asection *toc = bfd_get_section_by_name (ibfd, ".toc");
unsigned char *toc_ref = NULL;
for (sec = (ibfd->sections == toc && toc && toc->next ? toc->next
: ibfd->sections);
sec != NULL;
sec = (sec == toc ? NULL
: sec->next == NULL ? toc
: sec->next == toc && toc->next ? toc->next
: sec->next))
if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
{
Elf_Internal_Rela *relstart, *rel, *relend;
int expecting_tls_get_addr;
long toc_ref_index = 0;
relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
info->keep_memory);
if (relstart == NULL)
return FALSE;
expecting_tls_get_addr = 0;
relend = relstart + sec->reloc_count;
for (rel = relstart; rel < relend; rel++)
{
enum elf_ppc64_reloc_type r_type;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
asection *sym_sec;
char *tls_mask;
char tls_set, tls_clear, tls_type = 0;
bfd_vma value;
bfd_boolean ok_tprel, is_local;
r_symndx = ELF64_R_SYM (rel->r_info);
if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
r_symndx, ibfd))
{
err_free_rel:
if (elf_section_data (sec)->relocs != relstart)
free (relstart);
if (toc_ref != NULL)
free (toc_ref);
if (locsyms != NULL
&& (elf_tdata (ibfd)->symtab_hdr.contents
!= (unsigned char *) locsyms))
free (locsyms);
return FALSE;
}
if (h != NULL)
{
if (h->root.type != bfd_link_hash_defined
&& h->root.type != bfd_link_hash_defweak)
continue;
value = h->root.u.def.value;
}
else
STT_TLS. So no need for .opd local sym adjust. */
value = sym->st_value;
ok_tprel = FALSE;
is_local = FALSE;
if (h == NULL
|| !h->def_dynamic)
{
is_local = TRUE;
value += sym_sec->output_offset;
value += sym_sec->output_section->vma;
value -= htab->elf.tls_sec->vma;
ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
< (bfd_vma) 1 << 32);
}
r_type = ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
case R_PPC64_GOT_TLSLD16:
case R_PPC64_GOT_TLSLD16_LO:
case R_PPC64_GOT_TLSLD16_HI:
case R_PPC64_GOT_TLSLD16_HA:
defined in a shared lib. Leave them alone if
that turns out to be the case. */
ppc64_tlsld_got (ibfd)->refcount -= 1;
if (!is_local)
continue;
tls_set = 0;
tls_clear = TLS_LD;
tls_type = TLS_TLS | TLS_LD;
expecting_tls_get_addr = 1;
break;
case R_PPC64_GOT_TLSGD16:
case R_PPC64_GOT_TLSGD16_LO:
case R_PPC64_GOT_TLSGD16_HI:
case R_PPC64_GOT_TLSGD16_HA:
if (ok_tprel)
tls_set = 0;
else
tls_set = TLS_TLS | TLS_TPRELGD;
tls_clear = TLS_GD;
tls_type = TLS_TLS | TLS_GD;
expecting_tls_get_addr = 1;
break;
case R_PPC64_GOT_TPREL16_DS:
case R_PPC64_GOT_TPREL16_LO_DS:
case R_PPC64_GOT_TPREL16_HI:
case R_PPC64_GOT_TPREL16_HA:
expecting_tls_get_addr = 0;
if (ok_tprel)
{
tls_set = 0;
tls_clear = TLS_TPREL;
tls_type = TLS_TLS | TLS_TPREL;
break;
}
else
continue;
case R_PPC64_REL14:
case R_PPC64_REL14_BRTAKEN:
case R_PPC64_REL14_BRNTAKEN:
case R_PPC64_REL24:
if (h != NULL
&& (h == &htab->tls_get_addr->elf
|| h == &htab->tls_get_addr_fd->elf))
{
if (!expecting_tls_get_addr
&& rel != relstart
&& ((ELF64_R_TYPE (rel[-1].r_info)
== R_PPC64_TOC16)
|| (ELF64_R_TYPE (rel[-1].r_info)
== R_PPC64_TOC16_LO)))
{
char *toc_tls;
int retval;
retval = get_tls_mask (&toc_tls, NULL, &locsyms,
rel - 1, ibfd);
if (retval == 0)
goto err_free_rel;
if (retval > 1 && toc_tls != NULL)
{
expecting_tls_get_addr = 1;
if (toc_ref != NULL)
toc_ref[toc_ref_index] = 1;
}
}
if (expecting_tls_get_addr)
{
struct plt_entry *ent;
for (ent = h->plt.plist; ent; ent = ent->next)
if (ent->addend == 0)
{
if (ent->plt.refcount > 0)
ent->plt.refcount -= 1;
break;
}
}
}
expecting_tls_get_addr = 0;
continue;
case R_PPC64_TOC16:
case R_PPC64_TOC16_LO:
case R_PPC64_TLS:
expecting_tls_get_addr = 0;
if (sym_sec == toc && toc != NULL)
{
code sequence. We can do that now in the
case of R_PPC64_TLS, and after checking for
tls_get_addr for the TOC16 relocs. */
if (toc_ref == NULL)
{
toc_ref = bfd_zmalloc (toc->size / 8);
if (toc_ref == NULL)
goto err_free_rel;
}
if (h != NULL)
value = h->root.u.def.value;
else
value = sym->st_value;
value += rel->r_addend;
BFD_ASSERT (value < toc->size && value % 8 == 0);
toc_ref_index = value / 8;
if (r_type == R_PPC64_TLS)
toc_ref[toc_ref_index] = 1;
}
continue;
case R_PPC64_TPREL64:
expecting_tls_get_addr = 0;
if (sec != toc
|| toc_ref == NULL
|| !toc_ref[rel->r_offset / 8])
continue;
if (ok_tprel)
{
tls_set = TLS_EXPLICIT;
tls_clear = TLS_TPREL;
break;
}
else
continue;
case R_PPC64_DTPMOD64:
expecting_tls_get_addr = 0;
if (sec != toc
|| toc_ref == NULL
|| !toc_ref[rel->r_offset / 8])
continue;
if (rel + 1 < relend
&& (rel[1].r_info
== ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
&& rel[1].r_offset == rel->r_offset + 8)
{
if (ok_tprel)
tls_set = TLS_EXPLICIT | TLS_GD;
else
tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
tls_clear = TLS_GD;
}
else
{
if (!is_local)
continue;
tls_set = TLS_EXPLICIT;
tls_clear = TLS_LD;
}
break;
default:
expecting_tls_get_addr = 0;
continue;
}
if ((tls_set & TLS_EXPLICIT) == 0)
{
struct got_entry *ent;
if (h != NULL)
ent = h->got.glist;
else
ent = elf_local_got_ents (ibfd)[r_symndx];
for (; ent != NULL; ent = ent->next)
if (ent->addend == rel->r_addend
&& ent->owner == ibfd
&& ent->tls_type == tls_type)
break;
if (ent == NULL)
abort ();
if (tls_set == 0)
{
if (ent->got.refcount > 0)
ent->got.refcount -= 1;
}
}
else
{
we'll lose one or two dyn relocs. */
if (!dec_dynrel_count (rel->r_info, sec, info,
NULL, h, sym_sec))
return FALSE;
if (tls_set == (TLS_EXPLICIT | TLS_GD))
{
if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
NULL, h, sym_sec))
return FALSE;
}
}
*tls_mask |= tls_set;
*tls_mask &= ~tls_clear;
}
if (elf_section_data (sec)->relocs != relstart)
free (relstart);
}
if (toc_ref != NULL)
free (toc_ref);
if (locsyms != NULL
&& (elf_tdata (ibfd)->symtab_hdr.contents
!= (unsigned char *) locsyms))
{
if (!info->keep_memory)
free (locsyms);
else
elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
}
}
return TRUE;
}
the values of any global symbols in a toc section that has been
edited. Globals in toc sections should be a rarity, so this function
sets a flag if any are found in toc sections other than the one just
edited, so that futher hash table traversals can be avoided. */
struct adjust_toc_info
{
asection *toc;
unsigned long *skip;
bfd_boolean global_toc_syms;
};
static bfd_boolean
adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
{
struct ppc_link_hash_entry *eh;
struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
if (h->root.type == bfd_link_hash_indirect)
return TRUE;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if (h->root.type != bfd_link_hash_defined
&& h->root.type != bfd_link_hash_defweak)
return TRUE;
eh = (struct ppc_link_hash_entry *) h;
if (eh->adjust_done)
return TRUE;
if (eh->elf.root.u.def.section == toc_inf->toc)
{
unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
if (skip != (unsigned long) -1)
eh->elf.root.u.def.value -= skip;
else
{
(*_bfd_error_handler)
(_("%s defined in removed toc entry"), eh->elf.root.root.string);
eh->elf.root.u.def.section = &bfd_abs_section;
eh->elf.root.u.def.value = 0;
}
eh->adjust_done = 1;
}
else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
toc_inf->global_toc_syms = TRUE;
return TRUE;
}
unused .toc entries. */
bfd_boolean
ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
{
bfd *ibfd;
struct adjust_toc_info toc_inf;
toc_inf.global_toc_syms = TRUE;
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
{
asection *toc, *sec;
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Sym *local_syms;
struct elf_link_hash_entry **sym_hashes;
Elf_Internal_Rela *relstart, *rel;
unsigned long *skip, *drop;
unsigned char *used;
unsigned char *keep, last, some_unused;
toc = bfd_get_section_by_name (ibfd, ".toc");
if (toc == NULL
|| toc->size == 0
|| toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
|| elf_discarded_section (toc))
continue;
local_syms = NULL;
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (ibfd);
skip = NULL;
relstart = NULL;
for (sec = ibfd->sections; sec != NULL; sec = sec->next)
{
if (sec->reloc_count == 0
|| !elf_discarded_section (sec)
|| get_opd_info (sec)
|| (sec->flags & SEC_ALLOC) == 0
|| (sec->flags & SEC_DEBUGGING) != 0)
continue;
relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
if (relstart == NULL)
goto error_ret;
unused. */
for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
{
enum elf_ppc64_reloc_type r_type;
unsigned long r_symndx;
asection *sym_sec;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
bfd_vma val;
r_type = ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
default:
continue;
case R_PPC64_TOC16:
case R_PPC64_TOC16_LO:
case R_PPC64_TOC16_HI:
case R_PPC64_TOC16_HA:
case R_PPC64_TOC16_DS:
case R_PPC64_TOC16_LO_DS:
break;
}
r_symndx = ELF64_R_SYM (rel->r_info);
if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
r_symndx, ibfd))
goto error_ret;
if (sym_sec != toc)
continue;
if (h != NULL)
val = h->root.u.def.value;
else
val = sym->st_value;
val += rel->r_addend;
if (val >= toc->size)
continue;
If not, don't mark as unused. */
if (val & 7)
continue;
if (skip == NULL)
{
skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
if (skip == NULL)
goto error_ret;
}
skip[val >> 3] = 1;
}
if (elf_section_data (sec)->relocs != relstart)
free (relstart);
}
if (skip == NULL)
continue;
used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
if (used == NULL)
{
error_ret:
if (local_syms != NULL
&& symtab_hdr->contents != (unsigned char *) local_syms)
free (local_syms);
if (sec != NULL
&& relstart != NULL
&& elf_section_data (sec)->relocs != relstart)
free (relstart);
if (skip != NULL)
free (skip);
return FALSE;
}
Check the toc itself last. */
for (sec = (ibfd->sections == toc && toc->next ? toc->next
: ibfd->sections);
sec != NULL;
sec = (sec == toc ? NULL
: sec->next == NULL ? toc
: sec->next == toc && toc->next ? toc->next
: sec->next))
{
int repeat;
if (sec->reloc_count == 0
|| elf_discarded_section (sec)
|| get_opd_info (sec)
|| (sec->flags & SEC_ALLOC) == 0
|| (sec->flags & SEC_DEBUGGING) != 0)
continue;
relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
if (relstart == NULL)
goto error_ret;
repeat = 0;
do
for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
{
enum elf_ppc64_reloc_type r_type;
unsigned long r_symndx;
asection *sym_sec;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
bfd_vma val;
r_type = ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
case R_PPC64_TOC16:
case R_PPC64_TOC16_LO:
case R_PPC64_TOC16_HI:
case R_PPC64_TOC16_HA:
case R_PPC64_TOC16_DS:
case R_PPC64_TOC16_LO_DS:
case R_PPC64_ADDR64:
break;
default:
continue;
}
r_symndx = ELF64_R_SYM (rel->r_info);
if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
r_symndx, ibfd))
{
free (used);
goto error_ret;
}
if (sym_sec != toc)
continue;
if (h != NULL)
val = h->root.u.def.value;
else
val = sym->st_value;
val += rel->r_addend;
if (val >= toc->size)
continue;
this entry itself isn't unused. */
if (sec == toc
&& !used[val >> 3]
&& (used[rel->r_offset >> 3]
|| !skip[rel->r_offset >> 3]))
chains. */
repeat = 1;
used[val >> 3] = 1;
}
while (repeat);
}
doublewords not appearing as either used or unused belong
to to an entry more than one doubleword in size. */
for (drop = skip, keep = used, last = 0, some_unused = 0;
drop < skip + (toc->size + 7) / 8;
++drop, ++keep)
{
if (*keep)
{
*drop = 0;
last = 0;
}
else if (*drop)
{
some_unused = 1;
last = 1;
}
else
*drop = last;
}
free (used);
if (some_unused)
{
bfd_byte *contents, *src;
unsigned long off;
skip array from booleans into offsets. */
if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
goto error_ret;
elf_section_data (toc)->this_hdr.contents = contents;
for (src = contents, off = 0, drop = skip;
src < contents + toc->size;
src += 8, ++drop)
{
if (*drop)
{
*drop = (unsigned long) -1;
off += 8;
}
else if (off != 0)
{
*drop = off;
memcpy (src - off, src, 8);
}
}
toc->rawsize = toc->size;
toc->size = src - contents - off;
if (toc->reloc_count != 0)
{
Elf_Internal_Rela *wrel;
bfd_size_type sz;
relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
TRUE);
if (relstart == NULL)
goto error_ret;
wrel = relstart;
for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
if (skip[rel->r_offset >> 3] != (unsigned long) -1)
{
wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
wrel->r_info = rel->r_info;
wrel->r_addend = rel->r_addend;
++wrel;
}
else if (!dec_dynrel_count (rel->r_info, toc, info,
&local_syms, NULL, NULL))
goto error_ret;
toc->reloc_count = wrel - relstart;
sz = elf_section_data (toc)->rel_hdr.sh_entsize;
elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
}
for (sec = ibfd->sections; sec != NULL; sec = sec->next)
{
if (sec->reloc_count == 0
|| elf_discarded_section (sec))
continue;
relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
TRUE);
if (relstart == NULL)
goto error_ret;
for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
{
enum elf_ppc64_reloc_type r_type;
unsigned long r_symndx;
asection *sym_sec;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
r_type = ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
default:
continue;
case R_PPC64_TOC16:
case R_PPC64_TOC16_LO:
case R_PPC64_TOC16_HI:
case R_PPC64_TOC16_HA:
case R_PPC64_TOC16_DS:
case R_PPC64_TOC16_LO_DS:
case R_PPC64_ADDR64:
break;
}
r_symndx = ELF64_R_SYM (rel->r_info);
if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
r_symndx, ibfd))
goto error_ret;
if (sym_sec != toc || h != NULL || sym->st_value != 0)
continue;
rel->r_addend -= skip[rel->r_addend >> 3];
}
}
but handle them anyway. */
if (local_syms != NULL)
{
Elf_Internal_Sym *sym;
for (sym = local_syms;
sym < local_syms + symtab_hdr->sh_info;
++sym)
if (sym->st_shndx != SHN_UNDEF
&& (sym->st_shndx < SHN_LORESERVE
|| sym->st_shndx > SHN_HIRESERVE)
&& sym->st_value != 0
&& bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
{
if (skip[sym->st_value >> 3] != (unsigned long) -1)
sym->st_value -= skip[sym->st_value >> 3];
else
{
(*_bfd_error_handler)
(_("%s defined in removed toc entry"),
bfd_elf_sym_name (ibfd, symtab_hdr, sym,
NULL));
sym->st_value = 0;
sym->st_shndx = SHN_ABS;
}
symtab_hdr->contents = (unsigned char *) local_syms;
}
}
if (toc_inf.global_toc_syms)
{
toc_inf.toc = toc;
toc_inf.skip = skip;
toc_inf.global_toc_syms = FALSE;
elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
&toc_inf);
}
}
if (local_syms != NULL
&& symtab_hdr->contents != (unsigned char *) local_syms)
{
if (!info->keep_memory)
free (local_syms);
else
symtab_hdr->contents = (unsigned char *) local_syms;
}
free (skip);
}
return TRUE;
}
dynamic relocs. */
static bfd_boolean
allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
{
struct bfd_link_info *info;
struct ppc_link_hash_table *htab;
asection *s;
struct ppc_link_hash_entry *eh;
struct ppc_dyn_relocs *p;
struct got_entry *gent;
if (h->root.type == bfd_link_hash_indirect)
return TRUE;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
info = (struct bfd_link_info *) inf;
htab = ppc_hash_table (info);
if (htab->elf.dynamic_sections_created
&& h->dynindx != -1
&& WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
{
struct plt_entry *pent;
bfd_boolean doneone = FALSE;
for (pent = h->plt.plist; pent != NULL; pent = pent->next)
if (pent->plt.refcount > 0)
{
first entry. */
s = htab->plt;
if (s->size == 0)
s->size += PLT_INITIAL_ENTRY_SIZE;
pent->plt.offset = s->size;
s->size += PLT_ENTRY_SIZE;
s = htab->glink;
if (s->size == 0)
s->size += GLINK_CALL_STUB_SIZE;
if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
s->size += 4;
s->size += 2*4;
s = htab->relplt;
s->size += sizeof (Elf64_External_Rela);
doneone = TRUE;
}
else
pent->plt.offset = (bfd_vma) -1;
if (!doneone)
{
h->plt.plist = NULL;
h->needs_plt = 0;
}
}
else
{
h->plt.plist = NULL;
h->needs_plt = 0;
}
eh = (struct ppc_link_hash_entry *) h;
to TPREL. */
if ((eh->tls_mask & TLS_TPRELGD) != 0)
for (gent = h->got.glist; gent != NULL; gent = gent->next)
if (gent->got.refcount > 0
&& (gent->tls_type & TLS_GD) != 0)
{
there happens to be a TPREL entry we can use that one. */
struct got_entry *ent;
for (ent = h->got.glist; ent != NULL; ent = ent->next)
if (ent->got.refcount > 0
&& (ent->tls_type & TLS_TPREL) != 0
&& ent->addend == gent->addend
&& ent->owner == gent->owner)
{
gent->got.refcount = 0;
break;
}
if (gent->got.refcount != 0)
gent->tls_type = TLS_TLS | TLS_TPREL;
}
for (gent = h->got.glist; gent != NULL; gent = gent->next)
if (gent->got.refcount > 0)
{
bfd_boolean dyn;
Undefined weak syms won't yet be marked as dynamic,
nor will all TLS symbols. */
if (h->dynindx == -1
&& !h->forced_local)
{
if (! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
}
if ((gent->tls_type & TLS_LD) != 0
&& !h->def_dynamic)
{
gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
continue;
}
s = ppc64_elf_tdata (gent->owner)->got;
gent->got.offset = s->size;
s->size
+= (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
dyn = htab->elf.dynamic_sections_created;
if ((info->shared
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
&& (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak))
ppc64_elf_tdata (gent->owner)->relgot->size
+= (gent->tls_type & eh->tls_mask & TLS_GD
? 2 * sizeof (Elf64_External_Rela)
: sizeof (Elf64_External_Rela));
}
else
gent->got.offset = (bfd_vma) -1;
if (eh->dyn_relocs == NULL)
return TRUE;
dynamic pc-relative relocs against symbols which turn out to be
defined in regular objects. For the normal shared case, discard
space for relocs that have become local due to symbol visibility
changes. */
if (info->shared)
{
or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
generated via assembly. We want calls to protected symbols to
resolve directly to the function rather than going via the plt.
If people want function pointer comparisons to work as expected
then they should avoid writing weird assembly. */
if (SYMBOL_CALLS_LOCAL (info, h))
{
struct ppc_dyn_relocs **pp;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
{
p->count -= p->pc_count;
p->pc_count = 0;
if (p->count == 0)
*pp = p->next;
else
pp = &p->next;
}
}
visibility. */
if (eh->dyn_relocs != NULL
&& h->root.type == bfd_link_hash_undefweak)
{
if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
eh->dyn_relocs = NULL;
Undefined weak syms won't yet be marked as dynamic. */
else if (h->dynindx == -1
&& !h->forced_local)
{
if (! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
}
}
}
else if (ELIMINATE_COPY_RELOCS)
{
symbols which turn out to need copy relocs or are not
dynamic. */
if (!h->non_got_ref
&& h->def_dynamic
&& !h->def_regular)
{
Undefined weak syms won't yet be marked as dynamic. */
if (h->dynindx == -1
&& !h->forced_local)
{
if (! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
}
relocs. */
if (h->dynindx != -1)
goto keep;
}
eh->dyn_relocs = NULL;
keep: ;
}
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
asection *sreloc = elf_section_data (p->sec)->sreloc;
sreloc->size += p->count * sizeof (Elf64_External_Rela);
}
return TRUE;
}
static bfd_boolean
readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
{
struct ppc_link_hash_entry *eh;
struct ppc_dyn_relocs *p;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
eh = (struct ppc_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
asection *s = p->sec->output_section;
if (s != NULL && (s->flags & SEC_READONLY) != 0)
{
struct bfd_link_info *info = inf;
info->flags |= DF_TEXTREL;
return FALSE;
}
}
return TRUE;
}
static bfd_boolean
ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
bfd *dynobj;
asection *s;
bfd_boolean relocs;
bfd *ibfd;
htab = ppc_hash_table (info);
dynobj = htab->elf.dynobj;
if (dynobj == NULL)
abort ();
if (htab->elf.dynamic_sections_created)
{
if (info->executable)
{
s = bfd_get_section_by_name (dynobj, ".interp");
if (s == NULL)
abort ();
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
}
}
relocs. */
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
{
struct got_entry **lgot_ents;
struct got_entry **end_lgot_ents;
char *lgot_masks;
bfd_size_type locsymcount;
Elf_Internal_Shdr *symtab_hdr;
asection *srel;
if (!is_ppc64_elf_target (ibfd->xvec))
continue;
if (ppc64_tlsld_got (ibfd)->refcount > 0)
{
s = ppc64_elf_tdata (ibfd)->got;
ppc64_tlsld_got (ibfd)->offset = s->size;
s->size += 16;
if (info->shared)
{
srel = ppc64_elf_tdata (ibfd)->relgot;
srel->size += sizeof (Elf64_External_Rela);
}
}
else
ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
for (s = ibfd->sections; s != NULL; s = s->next)
{
struct ppc_dyn_relocs *p;
for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
{
if (!bfd_is_abs_section (p->sec)
&& bfd_is_abs_section (p->sec->output_section))
{
it is a copy of a linkonce section or due to
linker script /DISCARD/, so we'll be discarding
the relocs too. */
}
else if (p->count != 0)
{
srel = elf_section_data (p->sec)->sreloc;
srel->size += p->count * sizeof (Elf64_External_Rela);
if ((p->sec->output_section->flags & SEC_READONLY) != 0)
info->flags |= DF_TEXTREL;
}
}
}
lgot_ents = elf_local_got_ents (ibfd);
if (!lgot_ents)
continue;
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
locsymcount = symtab_hdr->sh_info;
end_lgot_ents = lgot_ents + locsymcount;
lgot_masks = (char *) end_lgot_ents;
s = ppc64_elf_tdata (ibfd)->got;
srel = ppc64_elf_tdata (ibfd)->relgot;
for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
{
struct got_entry *ent;
for (ent = *lgot_ents; ent != NULL; ent = ent->next)
if (ent->got.refcount > 0)
{
if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
{
if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
{
ppc64_tlsld_got (ibfd)->offset = s->size;
s->size += 16;
if (info->shared)
srel->size += sizeof (Elf64_External_Rela);
}
ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
}
else
{
ent->got.offset = s->size;
if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
{
s->size += 16;
if (info->shared)
srel->size += 2 * sizeof (Elf64_External_Rela);
}
else
{
s->size += 8;
if (info->shared)
srel->size += sizeof (Elf64_External_Rela);
}
}
}
else
ent->got.offset = (bfd_vma) -1;
}
}
sym dynamic relocs. */
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
Allocate memory for them. */
relocs = FALSE;
for (s = dynobj->sections; s != NULL; s = s->next)
{
if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
if (s == htab->brlt || s == htab->relbrlt)
continue;
else if (s == htab->got
|| s == htab->plt
|| s == htab->glink
|| s == htab->dynbss)
{
comment below. */
}
else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
{
if (s->size != 0)
{
if (s != htab->relplt)
relocs = TRUE;
to copy relocs into the output file. */
s->reloc_count = 0;
}
}
else
{
continue;
}
if (s->size == 0)
{
output file. This is mostly to handle .rela.bss and
.rela.plt. We must create both sections in
create_dynamic_sections, because they must be created
before the linker maps input sections to output
sections. The linker does that before
adjust_dynamic_symbol is called, and it is that
function which decides whether anything needs to go
into these sections. */
s->flags |= SEC_EXCLUDE;
continue;
}
if ((s->flags & SEC_HAS_CONTENTS) == 0)
continue;
here in case unused entries are not reclaimed before the
section's contents are written out. This should not happen,
but this way if it does we get a R_PPC64_NONE reloc in .rela
sections instead of garbage.
We also rely on the section contents being zero when writing
the GOT. */
s->contents = bfd_zalloc (dynobj, s->size);
if (s->contents == NULL)
return FALSE;
}
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
{
if (!is_ppc64_elf_target (ibfd->xvec))
continue;
s = ppc64_elf_tdata (ibfd)->got;
if (s != NULL && s != htab->got)
{
if (s->size == 0)
s->flags |= SEC_EXCLUDE;
else
{
s->contents = bfd_zalloc (ibfd, s->size);
if (s->contents == NULL)
return FALSE;
}
}
s = ppc64_elf_tdata (ibfd)->relgot;
if (s != NULL)
{
if (s->size == 0)
s->flags |= SEC_EXCLUDE;
else
{
s->contents = bfd_zalloc (ibfd, s->size);
if (s->contents == NULL)
return FALSE;
relocs = TRUE;
s->reloc_count = 0;
}
}
}
if (htab->elf.dynamic_sections_created)
{
values later, in ppc64_elf_finish_dynamic_sections, but we
must add the entries now so that we get the correct size for
the .dynamic section. The DT_DEBUG entry is filled in by the
dynamic linker and used by the debugger. */
#define add_dynamic_entry(TAG, VAL) \
_bfd_elf_add_dynamic_entry (info, TAG, VAL)
if (info->executable)
{
if (!add_dynamic_entry (DT_DEBUG, 0))
return FALSE;
}
if (htab->plt != NULL && htab->plt->size != 0)
{
if (!add_dynamic_entry (DT_PLTGOT, 0)
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
|| !add_dynamic_entry (DT_PLTREL, DT_RELA)
|| !add_dynamic_entry (DT_JMPREL, 0)
|| !add_dynamic_entry (DT_PPC64_GLINK, 0))
return FALSE;
}
if (NO_OPD_RELOCS)
{
if (!add_dynamic_entry (DT_PPC64_OPD, 0)
|| !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
return FALSE;
}
if (relocs)
{
if (!add_dynamic_entry (DT_RELA, 0)
|| !add_dynamic_entry (DT_RELASZ, 0)
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
return FALSE;
then we need a DT_TEXTREL entry. */
if ((info->flags & DF_TEXTREL) == 0)
elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
if ((info->flags & DF_TEXTREL) != 0)
{
if (!add_dynamic_entry (DT_TEXTREL, 0))
return FALSE;
}
}
}
#undef add_dynamic_entry
return TRUE;
}
static inline enum ppc_stub_type
ppc_type_of_stub (asection *input_sec,
const Elf_Internal_Rela *rel,
struct ppc_link_hash_entry **hash,
bfd_vma destination)
{
struct ppc_link_hash_entry *h = *hash;
bfd_vma location;
bfd_vma branch_offset;
bfd_vma max_branch_offset;
enum elf_ppc64_reloc_type r_type;
if (h != NULL)
{
struct ppc_link_hash_entry *fdh = h;
if (fdh->oh != NULL
&& fdh->oh->is_func_descriptor)
fdh = fdh->oh;
if (fdh->elf.dynindx != -1)
{
struct plt_entry *ent;
for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
if (ent->addend == rel->r_addend
&& ent->plt.offset != (bfd_vma) -1)
{
*hash = fdh;
return ppc_stub_plt_call;
}
}
either a defined function descriptor or a defined entry symbol
in a regular object file, then it is pointless trying to make
any other type of stub. */
if (!((fdh->elf.root.type == bfd_link_hash_defined
|| fdh->elf.root.type == bfd_link_hash_defweak)
&& fdh->elf.root.u.def.section->output_section != NULL)
&& !((h->elf.root.type == bfd_link_hash_defined
|| h->elf.root.type == bfd_link_hash_defweak)
&& h->elf.root.u.def.section->output_section != NULL))
return ppc_stub_none;
}
location = (input_sec->output_offset
+ input_sec->output_section->vma
+ rel->r_offset);
branch_offset = destination - location;
r_type = ELF64_R_TYPE (rel->r_info);
max_branch_offset = 1 << 25;
if (r_type != R_PPC64_REL24)
max_branch_offset = 1 << 15;
if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
is needed later. */
return ppc_stub_long_branch;
return ppc_stub_none;
}
static inline bfd_byte *
build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
{
#define PPC_LO(v) ((v) & 0xffff)
#define PPC_HI(v) (((v) >> 16) & 0xffff)
#define PPC_HA(v) PPC_HI ((v) + 0x8000)
bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
if (PPC_HA (offset + 8) != PPC_HA (offset))
bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
offset += 8;
bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
if (PPC_HA (offset + 8) != PPC_HA (offset))
bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
offset += 8;
bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
bfd_put_32 (obfd, BCTR, p), p += 4;
return p;
}
static bfd_boolean
ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
{
struct ppc_stub_hash_entry *stub_entry;
struct ppc_branch_hash_entry *br_entry;
struct bfd_link_info *info;
struct ppc_link_hash_table *htab;
bfd_byte *loc;
bfd_byte *p;
unsigned int indx;
struct plt_entry *ent;
bfd_vma dest, off;
int size;
stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
info = in_arg;
htab = ppc_hash_table (info);
stub_entry->stub_offset = stub_entry->stub_sec->size;
loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
htab->stub_count[stub_entry->stub_type - 1] += 1;
switch (stub_entry->stub_type)
{
case ppc_stub_long_branch:
case ppc_stub_long_branch_r2off:
off = dest = (stub_entry->target_value
+ stub_entry->target_section->output_offset
+ stub_entry->target_section->output_section->vma);
off -= (stub_entry->stub_offset
+ stub_entry->stub_sec->output_offset
+ stub_entry->stub_sec->output_section->vma);
if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
size = 4;
else
{
bfd_vma r2off;
r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
- htab->stub_group[stub_entry->id_sec->id].toc_off);
bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
loc += 4;
bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
loc += 4;
bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
loc += 4;
off -= 12;
size = 16;
}
bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
if (off + (1 << 25) >= (bfd_vma) (1 << 26))
{
(*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
stub_entry->root.string);
htab->stub_error = TRUE;
return FALSE;
}
if (info->emitrelocations)
{
Elf_Internal_Rela *relocs, *r;
struct bfd_elf_section_data *elfsec_data;
elfsec_data = elf_section_data (stub_entry->stub_sec);
relocs = elfsec_data->relocs;
if (relocs == NULL)
{
bfd_size_type relsize;
relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
relocs = bfd_alloc (htab->stub_bfd, relsize);
if (relocs == NULL)
return FALSE;
elfsec_data->relocs = relocs;
elfsec_data->rel_hdr.sh_size = relsize;
elfsec_data->rel_hdr.sh_entsize = 24;
stub_entry->stub_sec->reloc_count = 0;
}
r = relocs + stub_entry->stub_sec->reloc_count;
stub_entry->stub_sec->reloc_count += 1;
r->r_offset = loc - stub_entry->stub_sec->contents;
r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
r->r_addend = dest;
if (stub_entry->h != NULL)
{
struct elf_link_hash_entry **hashes;
unsigned long symndx;
struct ppc_link_hash_entry *h;
hashes = elf_sym_hashes (htab->stub_bfd);
if (hashes == NULL)
{
bfd_size_type hsize;
hsize = (htab->stub_globals + 1) * sizeof (*hashes);
hashes = bfd_zalloc (htab->stub_bfd, hsize);
if (hashes == NULL)
return FALSE;
elf_sym_hashes (htab->stub_bfd) = hashes;
htab->stub_globals = 1;
}
symndx = htab->stub_globals++;
h = stub_entry->h;
hashes[symndx] = &h->elf;
r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
if (h->oh != NULL && h->oh->is_func)
h = h->oh;
if (h->elf.root.u.def.section != stub_entry->target_section)
r->r_addend = 0;
else
{
off = (h->elf.root.u.def.value
+ h->elf.root.u.def.section->output_offset
+ h->elf.root.u.def.section->output_section->vma);
r->r_addend -= off;
}
}
}
break;
case ppc_stub_plt_branch:
case ppc_stub_plt_branch_r2off:
br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
stub_entry->root.string + 9,
FALSE, FALSE);
if (br_entry == NULL)
{
(*_bfd_error_handler) (_("can't find branch stub `%s'"),
stub_entry->root.string);
htab->stub_error = TRUE;
return FALSE;
}
off = (stub_entry->target_value
+ stub_entry->target_section->output_offset
+ stub_entry->target_section->output_section->vma);
bfd_put_64 (htab->brlt->owner, off,
htab->brlt->contents + br_entry->offset);
if (htab->relbrlt != NULL)
{
Elf_Internal_Rela rela;
bfd_byte *rl;
rela.r_offset = (br_entry->offset
+ htab->brlt->output_offset
+ htab->brlt->output_section->vma);
rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
rela.r_addend = off;
rl = htab->relbrlt->contents;
rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
}
off = (br_entry->offset
+ htab->brlt->output_offset
+ htab->brlt->output_section->vma
- elf_gp (htab->brlt->output_section->owner)
- htab->stub_group[stub_entry->id_sec->id].toc_off);
if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
{
(*_bfd_error_handler)
(_("linkage table error against `%s'"),
stub_entry->root.string);
bfd_set_error (bfd_error_bad_value);
htab->stub_error = TRUE;
return FALSE;
}
indx = off;
if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
{
bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
loc += 4;
bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
size = 16;
}
else
{
bfd_vma r2off;
r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
- htab->stub_group[stub_entry->id_sec->id].toc_off);
bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
loc += 4;
bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
loc += 4;
bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
loc += 4;
bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
loc += 4;
bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
size = 28;
}
loc += 4;
bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
loc += 4;
bfd_put_32 (htab->stub_bfd, BCTR, loc);
break;
case ppc_stub_plt_call:
exporting ".foo" for each "foo". This can happen when symbol
versioning scripts strip all bar a subset of symbols. */
if (stub_entry->h->oh != NULL
&& stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
&& stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
{
we don't really care; The main thing is to make this sym
defined somewhere. Maybe defining the symbol in the stub
section is a silly idea. If we didn't do this, htab->top_id
could disappear. */
stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
}
off = (bfd_vma) -1;
for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
if (ent->addend == stub_entry->addend)
{
off = ent->plt.offset;
break;
}
if (off >= (bfd_vma) -2)
abort ();
off &= ~ (bfd_vma) 1;
off += (htab->plt->output_offset
+ htab->plt->output_section->vma
- elf_gp (htab->plt->output_section->owner)
- htab->stub_group[stub_entry->id_sec->id].toc_off);
if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
{
(*_bfd_error_handler)
(_("linkage table error against `%s'"),
stub_entry->h->elf.root.root.string);
bfd_set_error (bfd_error_bad_value);
htab->stub_error = TRUE;
return FALSE;
}
p = build_plt_stub (htab->stub_bfd, loc, off);
size = p - loc;
break;
default:
BFD_FAIL ();
return FALSE;
}
stub_entry->stub_sec->size += size;
if (htab->emit_stub_syms)
{
struct elf_link_hash_entry *h;
size_t len1, len2;
char *name;
const char *const stub_str[] = { "long_branch",
"long_branch_r2off",
"plt_branch",
"plt_branch_r2off",
"plt_call" };
len1 = strlen (stub_str[stub_entry->stub_type - 1]);
len2 = strlen (stub_entry->root.string);
name = bfd_malloc (len1 + len2 + 2);
if (name == NULL)
return FALSE;
memcpy (name, stub_entry->root.string, 9);
memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
if (h == NULL)
return FALSE;
if (h->root.type == bfd_link_hash_new)
{
h->root.type = bfd_link_hash_defined;
h->root.u.def.section = stub_entry->stub_sec;
h->root.u.def.value = stub_entry->stub_offset;
h->ref_regular = 1;
h->def_regular = 1;
h->ref_regular_nonweak = 1;
h->forced_local = 1;
h->non_elf = 0;
}
}
return TRUE;
}
we know stub section sizes, and select plt_branch stubs where
long_branch stubs won't do. */
static bfd_boolean
ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
{
struct ppc_stub_hash_entry *stub_entry;
struct bfd_link_info *info;
struct ppc_link_hash_table *htab;
bfd_vma off;
int size;
stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
info = in_arg;
htab = ppc_hash_table (info);
if (stub_entry->stub_type == ppc_stub_plt_call)
{
struct plt_entry *ent;
off = (bfd_vma) -1;
for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
if (ent->addend == stub_entry->addend)
{
off = ent->plt.offset & ~(bfd_vma) 1;
break;
}
if (off >= (bfd_vma) -2)
abort ();
off += (htab->plt->output_offset
+ htab->plt->output_section->vma
- elf_gp (htab->plt->output_section->owner)
- htab->stub_group[stub_entry->id_sec->id].toc_off);
size = PLT_CALL_STUB_SIZE;
if (PPC_HA (off + 16) != PPC_HA (off))
size += 4;
}
else
{
variants. */
off = (stub_entry->target_value
+ stub_entry->target_section->output_offset
+ stub_entry->target_section->output_section->vma);
off -= (stub_entry->stub_sec->size
+ stub_entry->stub_sec->output_offset
+ stub_entry->stub_sec->output_section->vma);
can reach with a shorter stub. */
if (stub_entry->stub_type >= ppc_stub_plt_branch)
stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
size = 4;
if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
{
off -= 12;
size = 16;
}
if (off + (1 << 25) >= (bfd_vma) (1 << 26))
{
struct ppc_branch_hash_entry *br_entry;
br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
stub_entry->root.string + 9,
TRUE, FALSE);
if (br_entry == NULL)
{
(*_bfd_error_handler) (_("can't build branch stub `%s'"),
stub_entry->root.string);
htab->stub_error = TRUE;
return FALSE;
}
if (br_entry->iter != htab->stub_iteration)
{
br_entry->iter = htab->stub_iteration;
br_entry->offset = htab->brlt->size;
htab->brlt->size += 8;
if (htab->relbrlt != NULL)
htab->relbrlt->size += sizeof (Elf64_External_Rela);
}
stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
size = 16;
if (stub_entry->stub_type != ppc_stub_plt_branch)
size = 28;
}
if (info->emitrelocations
&& (stub_entry->stub_type == ppc_stub_long_branch
|| stub_entry->stub_type == ppc_stub_long_branch_r2off))
stub_entry->stub_sec->reloc_count += 1;
}
stub_entry->stub_sec->size += size;
return TRUE;
}
for each output section included in the link. Returns -1 on error,
0 when no stubs will be needed, and 1 on success. */
int
ppc64_elf_setup_section_lists (bfd *output_bfd,
struct bfd_link_info *info,
int no_multi_toc)
{
bfd *input_bfd;
int top_id, top_index, id;
asection *section;
asection **input_list;
bfd_size_type amt;
struct ppc_link_hash_table *htab = ppc_hash_table (info);
htab->no_multi_toc = no_multi_toc;
if (htab->brlt == NULL)
return 0;
for (input_bfd = info->input_bfds, top_id = 3;
input_bfd != NULL;
input_bfd = input_bfd->link_next)
{
for (section = input_bfd->sections;
section != NULL;
section = section->next)
{
if (top_id < section->id)
top_id = section->id;
}
}
htab->top_id = top_id;
amt = sizeof (struct map_stub) * (top_id + 1);
htab->stub_group = bfd_zmalloc (amt);
if (htab->stub_group == NULL)
return -1;
for (id = 0; id < 3; id++)
htab->stub_group[id].toc_off = TOC_BASE_OFF;
elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
section index as some sections may have been removed, and
strip_excluded_output_sections doesn't renumber the indices. */
for (section = output_bfd->sections, top_index = 0;
section != NULL;
section = section->next)
{
if (top_index < section->index)
top_index = section->index;
}
htab->top_index = top_index;
amt = sizeof (asection *) * (top_index + 1);
input_list = bfd_zmalloc (amt);
htab->input_list = input_list;
if (input_list == NULL)
return -1;
return 1;
}
and linker generated GOT section. Group input bfds such that the toc
within a group is less than 64k in size. Will break with cute linker
scripts that play games with dot in the output toc section. */
void
ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
{
struct ppc_link_hash_table *htab = ppc_hash_table (info);
if (!htab->no_multi_toc)
{
bfd_vma addr = isec->output_offset + isec->output_section->vma;
bfd_vma off = addr - htab->toc_curr;
if (off + isec->size > 0x10000)
htab->toc_curr = addr;
elf_gp (isec->owner) = (htab->toc_curr
- elf_gp (isec->output_section->owner)
+ TOC_BASE_OFF);
}
}
void
ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab = ppc_hash_table (info);
htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
ppc64_elf_next_input_section. Start off at 0x8000. */
htab->toc_curr = TOC_BASE_OFF;
}
calls, then there's no need to use toc adjusting stubs when branching
into ISEC. Actually, indirect calls from ISEC are OK as they will
load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
needed, and 2 if a cyclical call-graph was found but no other reason
for a stub was detected. If called from the top level, a return of
2 means the same as a return of 0. */
static int
toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
{
Elf_Internal_Rela *relstart, *rel;
Elf_Internal_Sym *local_syms;
int ret;
struct ppc_link_hash_table *htab;
if ((isec->flags & SEC_LINKER_CREATED) != 0)
return 0;
if (isec->size == 0)
return 0;
if (isec->output_section == NULL)
return 0;
the function that hit an exception. */
if (strcmp (isec->name, ".fixup") == 0)
return 0;
if (isec->reloc_count == 0)
return 0;
relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
info->keep_memory);
if (relstart == NULL)
return -1;
local_syms = NULL;
ret = 0;
htab = ppc_hash_table (info);
for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
{
enum elf_ppc64_reloc_type r_type;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
asection *sym_sec;
long *opd_adjust;
bfd_vma sym_value;
bfd_vma dest;
r_type = ELF64_R_TYPE (rel->r_info);
if (r_type != R_PPC64_REL24
&& r_type != R_PPC64_REL14
&& r_type != R_PPC64_REL14_BRTAKEN
&& r_type != R_PPC64_REL14_BRNTAKEN)
continue;
r_symndx = ELF64_R_SYM (rel->r_info);
if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
isec->owner))
{
ret = -1;
break;
}
that uses r2. Branches to undefined symbols might be a call
using old-style dot symbols that can be satisfied by a plt
call into a new-style dynamic library. */
if (sym_sec == NULL)
{
struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
if (eh != NULL
&& eh->oh != NULL
&& eh->oh->elf.plt.plist != NULL)
{
ret = 1;
break;
}
continue;
}
stubs too, to cover -R and absolute syms. */
if (sym_sec->output_section == NULL)
{
ret = 1;
break;
}
if (h == NULL)
sym_value = sym->st_value;
else
{
if (h->root.type != bfd_link_hash_defined
&& h->root.type != bfd_link_hash_defweak)
abort ();
sym_value = h->root.u.def.value;
}
sym_value += rel->r_addend;
opd_adjust = get_opd_info (sym_sec);
if (opd_adjust != NULL)
{
if (h == NULL)
{
long adjust;
adjust = opd_adjust[sym->st_value / 8];
if (adjust == -1)
continue;
sym_value += adjust;
}
dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
if (dest == (bfd_vma) -1)
continue;
}
else
dest = (sym_value
+ sym_sec->output_offset
+ sym_sec->output_section->vma);
if (sym_sec == isec)
continue;
if (sym_sec->has_toc_reloc
|| sym_sec->makes_toc_func_call)
{
ret = 1;
break;
}
need a plt_branch stub. A plt_branch stub uses r2. */
else if (dest - (isec->output_offset
+ isec->output_section->vma
+ rel->r_offset) + (1 << 25) >= (2 << 25))
{
ret = 1;
break;
}
can't say for sure that no toc adjusting stubs are needed, so
don't return zero. */
else if (sym_sec->call_check_in_progress)
ret = 2;
references are OK. Recursively call ourselves to check. */
else if (sym_sec->id <= htab->top_id
&& htab->stub_group[sym_sec->id].toc_off == 0)
{
int recur;
sections that call back to current won't be marked as
known. */
isec->call_check_in_progress = 1;
recur = toc_adjusting_stub_needed (info, sym_sec);
isec->call_check_in_progress = 0;
if (recur < 0)
{
ret = -1;
break;
}
else if (recur <= 1)
{
htab->stub_group[sym_sec->id].toc_off = 1;
if (recur != 0)
{
sym_sec->makes_toc_func_call = 1;
ret = 1;
break;
}
}
else
{
ret = 2;
}
}
}
if (local_syms != NULL
&& (elf_tdata (isec->owner)->symtab_hdr.contents
!= (unsigned char *) local_syms))
free (local_syms);
if (elf_section_data (isec)->relocs != relstart)
free (relstart);
return ret;
}
in the order that input sections are linked into output sections.
Build lists of input sections to determine groupings between which
we may insert linker stubs. */
bfd_boolean
ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
{
struct ppc_link_hash_table *htab = ppc_hash_table (info);
if ((isec->output_section->flags & SEC_CODE) != 0
&& isec->output_section->index <= htab->top_index)
{
asection **list = htab->input_list + isec->output_section->index;
#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
which is what we want. */
PREV_SEC (isec) = *list;
*list = isec;
}
if (htab->multi_toc_needed)
{
to use the right TOC (obviously). Also, make sure that .opd gets
the correct TOC value for R_PPC64_TOC relocs that don't have or
can't find their function symbol (shouldn't ever happen now). */
if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
{
if (elf_gp (isec->owner) != 0)
htab->toc_curr = elf_gp (isec->owner);
}
else if (htab->stub_group[isec->id].toc_off == 0)
{
int ret = toc_adjusting_stub_needed (info, isec);
if (ret < 0)
return FALSE;
else
isec->makes_toc_func_call = ret & 1;
}
}
Use the last TOC base. This happens to make _init and _fini
pasting work. */
htab->stub_group[isec->id].toc_off = htab->toc_curr;
return TRUE;
}
sections may result in fewer stubs. More importantly, we need to
put all .init* and .fini* stubs at the beginning of the .init or
.fini output sections respectively, because glibc splits the
_init and _fini functions into multiple parts. Putting a stub in
the middle of a function is not a good idea. */
static void
group_sections (struct ppc_link_hash_table *htab,
bfd_size_type stub_group_size,
bfd_boolean stubs_always_before_branch)
{
asection **list = htab->input_list + htab->top_index;
do
{
asection *tail = *list;
while (tail != NULL)
{
asection *curr;
asection *prev;
bfd_size_type total;
bfd_boolean big_sec;
bfd_vma curr_toc;
curr = tail;
total = tail->size;
big_sec = total > stub_group_size;
if (big_sec)
(*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
tail->owner, tail);
curr_toc = htab->stub_group[tail->id].toc_off;
while ((prev = PREV_SEC (curr)) != NULL
&& ((total += curr->output_offset - prev->output_offset)
< stub_group_size)
&& htab->stub_group[prev->id].toc_off == curr_toc)
curr = prev;
than stub_group_size and thus can be handled by one stub
section. (or the tail section is itself larger than
stub_group_size, in which case we may be toast.) We
should really be keeping track of the total size of stubs
added here, as stubs contribute to the final output
section size. That's a little tricky, and this way will
only break if stubs added make the total size more than
2^25, ie. for the default stub_group_size, if stubs total
more than 2097152 bytes, or nearly 75000 plt call stubs. */
do
{
prev = PREV_SEC (tail);
htab->stub_group[tail->id].link_sec = curr;
}
while (tail != curr && (tail = prev) != NULL);
bytes before the stub section can be handled by it too.
Don't do this if we have a really large section after the
stubs, as adding more stubs increases the chance that
branches may not reach into the stub section. */
if (!stubs_always_before_branch && !big_sec)
{
total = 0;
while (prev != NULL
&& ((total += tail->output_offset - prev->output_offset)
< stub_group_size)
&& htab->stub_group[prev->id].toc_off == curr_toc)
{
tail = prev;
prev = PREV_SEC (tail);
htab->stub_group[tail->id].link_sec = curr;
}
}
tail = prev;
}
}
while (list-- != htab->input_list);
free (htab->input_list);
#undef PREV_SEC
}
The basic idea here is to examine all the relocations looking for
PC-relative calls to a target that is unreachable with a "bl"
instruction. */
bfd_boolean
ppc64_elf_size_stubs (bfd *output_bfd,
struct bfd_link_info *info,
bfd_signed_vma group_size,
asection *(*add_stub_section) (const char *, asection *),
void (*layout_sections_again) (void))
{
bfd_size_type stub_group_size;
bfd_boolean stubs_always_before_branch;
struct ppc_link_hash_table *htab = ppc_hash_table (info);
htab->add_stub_section = add_stub_section;
htab->layout_sections_again = layout_sections_again;
stubs_always_before_branch = group_size < 0;
if (group_size < 0)
stub_group_size = -group_size;
else
stub_group_size = group_size;
if (stub_group_size == 1)
{
if (stubs_always_before_branch)
{
stub_group_size = 0x1e00000;
if (htab->has_14bit_branch)
stub_group_size = 0x7800;
}
else
{
stub_group_size = 0x1c00000;
if (htab->has_14bit_branch)
stub_group_size = 0x7000;
}
}
group_sections (htab, stub_group_size, stubs_always_before_branch);
while (1)
{
bfd *input_bfd;
unsigned int bfd_indx;
asection *stub_sec;
htab->stub_iteration += 1;
for (input_bfd = info->input_bfds, bfd_indx = 0;
input_bfd != NULL;
input_bfd = input_bfd->link_next, bfd_indx++)
{
Elf_Internal_Shdr *symtab_hdr;
asection *section;
Elf_Internal_Sym *local_syms = NULL;
if (!is_ppc64_elf_target (input_bfd->xvec))
continue;
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
if (symtab_hdr->sh_info == 0)
continue;
for (section = input_bfd->sections;
section != NULL;
section = section->next)
{
Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
to do. */
if ((section->flags & SEC_RELOC) == 0
|| section->reloc_count == 0)
continue;
discarded, then don't create any stubs. */
if (section->output_section == NULL
|| section->output_section->owner != output_bfd)
continue;
internal_relocs
= _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
info->keep_memory);
if (internal_relocs == NULL)
goto error_ret_free_local;
irela = internal_relocs;
irelaend = irela + section->reloc_count;
for (; irela < irelaend; irela++)
{
enum elf_ppc64_reloc_type r_type;
unsigned int r_indx;
enum ppc_stub_type stub_type;
struct ppc_stub_hash_entry *stub_entry;
asection *sym_sec, *code_sec;
bfd_vma sym_value;
bfd_vma destination;
bfd_boolean ok_dest;
struct ppc_link_hash_entry *hash;
struct ppc_link_hash_entry *fdh;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
char *stub_name;
const asection *id_sec;
long *opd_adjust;
r_type = ELF64_R_TYPE (irela->r_info);
r_indx = ELF64_R_SYM (irela->r_info);
if (r_type >= R_PPC64_max)
{
bfd_set_error (bfd_error_bad_value);
goto error_ret_free_internal;
}
if (r_type != R_PPC64_REL24
&& r_type != R_PPC64_REL14
&& r_type != R_PPC64_REL14_BRTAKEN
&& r_type != R_PPC64_REL14_BRNTAKEN)
continue;
section. */
if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
r_indx, input_bfd))
goto error_ret_free_internal;
hash = (struct ppc_link_hash_entry *) h;
ok_dest = FALSE;
fdh = NULL;
sym_value = 0;
if (hash == NULL)
{
sym_value = sym->st_value;
ok_dest = TRUE;
}
else if (hash->elf.root.type == bfd_link_hash_defined
|| hash->elf.root.type == bfd_link_hash_defweak)
{
sym_value = hash->elf.root.u.def.value;
if (sym_sec->output_section != NULL)
ok_dest = TRUE;
}
else if (hash->elf.root.type == bfd_link_hash_undefweak
|| hash->elf.root.type == bfd_link_hash_undefined)
{
use the func descriptor sym instead if it is
defined. */
if (hash->elf.root.root.string[0] == '.'
&& (fdh = get_fdh (hash, htab)) != NULL)
{
if (fdh->elf.root.type == bfd_link_hash_defined
|| fdh->elf.root.type == bfd_link_hash_defweak)
{
sym_sec = fdh->elf.root.u.def.section;
sym_value = fdh->elf.root.u.def.value;
if (sym_sec->output_section != NULL)
ok_dest = TRUE;
}
else
fdh = NULL;
}
}
else
{
bfd_set_error (bfd_error_bad_value);
goto error_ret_free_internal;
}
destination = 0;
if (ok_dest)
{
sym_value += irela->r_addend;
destination = (sym_value
+ sym_sec->output_offset
+ sym_sec->output_section->vma);
}
code_sec = sym_sec;
opd_adjust = get_opd_info (sym_sec);
if (opd_adjust != NULL)
{
bfd_vma dest;
if (hash == NULL)
{
long adjust = opd_adjust[sym_value / 8];
if (adjust == -1)
continue;
sym_value += adjust;
}
dest = opd_entry_value (sym_sec, sym_value,
&code_sec, &sym_value);
if (dest != (bfd_vma) -1)
{
destination = dest;
if (fdh != NULL)
{
entry. */
hash->elf.root.type = bfd_link_hash_defweak;
hash->elf.root.u.def.section = code_sec;
hash->elf.root.u.def.value = sym_value;
}
}
}
stub_type = ppc_type_of_stub (section, irela, &hash,
destination);
if (stub_type != ppc_stub_plt_call)
{
Since the linker pastes together pieces from
different object files when creating the
_init and _fini functions, it may be that a
call to what looks like a local sym is in
fact a call needing a TOC adjustment. */
if (code_sec != NULL
&& code_sec->output_section != NULL
&& (htab->stub_group[code_sec->id].toc_off
!= htab->stub_group[section->id].toc_off)
&& (code_sec->has_toc_reloc
|| code_sec->makes_toc_func_call))
stub_type = ppc_stub_long_branch_r2off;
}
if (stub_type == ppc_stub_none)
continue;
if (stub_type != ppc_stub_plt_call
&& hash != NULL
&& (hash == htab->tls_get_addr
|| hash == htab->tls_get_addr_fd)
&& section->has_tls_reloc
&& irela != internal_relocs)
{
char *tls_mask;
if (!get_tls_mask (&tls_mask, NULL, &local_syms,
irela - 1, input_bfd))
goto error_ret_free_internal;
if (*tls_mask != 0)
continue;
}
id_sec = htab->stub_group[section->id].link_sec;
stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
if (!stub_name)
goto error_ret_free_internal;
stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
stub_name, FALSE, FALSE);
if (stub_entry != NULL)
{
free (stub_name);
continue;
}
stub_entry = ppc_add_stub (stub_name, section, htab);
if (stub_entry == NULL)
{
free (stub_name);
error_ret_free_internal:
if (elf_section_data (section)->relocs == NULL)
free (internal_relocs);
error_ret_free_local:
if (local_syms != NULL
&& (symtab_hdr->contents
!= (unsigned char *) local_syms))
free (local_syms);
return FALSE;
}
stub_entry->stub_type = stub_type;
stub_entry->target_value = sym_value;
stub_entry->target_section = code_sec;
stub_entry->h = hash;
stub_entry->addend = irela->r_addend;
if (stub_entry->h != NULL)
htab->stub_globals += 1;
}
if (elf_section_data (section)->relocs != internal_relocs)
free (internal_relocs);
}
if (local_syms != NULL
&& symtab_hdr->contents != (unsigned char *) local_syms)
{
if (!info->keep_memory)
free (local_syms);
else
symtab_hdr->contents = (unsigned char *) local_syms;
}
}
stub sections. */
for (stub_sec = htab->stub_bfd->sections;
stub_sec != NULL;
stub_sec = stub_sec->next)
if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
{
stub_sec->rawsize = stub_sec->size;
stub_sec->size = 0;
stub_sec->reloc_count = 0;
}
htab->brlt->size = 0;
if (htab->relbrlt != NULL)
htab->relbrlt->size = 0;
bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
for (stub_sec = htab->stub_bfd->sections;
stub_sec != NULL;
stub_sec = stub_sec->next)
if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
&& stub_sec->rawsize != stub_sec->size)
break;
have changed size. */
if (stub_sec == NULL)
break;
(*htab->layout_sections_again) ();
}
section is empty, but it's too late. If we strip sections here,
the dynamic symbol table is corrupted since the section symbol
for the stripped section isn't written. */
return TRUE;
}
move, we'll be called again. Provide a value for TOCstart. */
bfd_vma
ppc64_elf_toc (bfd *obfd)
{
asection *s;
bfd_vma TOCstart;
order. The TOC starts where the first of these sections starts. */
s = bfd_get_section_by_name (obfd, ".got");
if (s == NULL)
s = bfd_get_section_by_name (obfd, ".toc");
if (s == NULL)
s = bfd_get_section_by_name (obfd, ".tocbss");
if (s == NULL)
s = bfd_get_section_by_name (obfd, ".plt");
if (s == NULL)
{
o references to TOC base (SYM@toc / TOC[tc0]) without a
.toc directive
o bad linker script
o --gc-sections and empty TOC sections
FIXME: Warn user? */
using TOCstart. */
for (s = obfd->sections; s != NULL; s = s->next)
if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
== (SEC_ALLOC | SEC_SMALL_DATA))
break;
if (s == NULL)
for (s = obfd->sections; s != NULL; s = s->next)
if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
== (SEC_ALLOC | SEC_SMALL_DATA))
break;
if (s == NULL)
for (s = obfd->sections; s != NULL; s = s->next)
if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
break;
if (s == NULL)
for (s = obfd->sections; s != NULL; s = s->next)
if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
break;
}
TOCstart = 0;
if (s != NULL)
TOCstart = s->output_section->vma + s->output_offset;
return TOCstart;
}
The stubs are kept in a hash table attached to the main linker
hash table. This function is called via gldelf64ppc_finish. */
bfd_boolean
ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
struct bfd_link_info *info,
char **stats)
{
struct ppc_link_hash_table *htab = ppc_hash_table (info);
asection *stub_sec;
bfd_byte *p;
int stub_sec_count = 0;
htab->emit_stub_syms = emit_stub_syms;
for (stub_sec = htab->stub_bfd->sections;
stub_sec != NULL;
stub_sec = stub_sec->next)
if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
&& stub_sec->size != 0)
{
stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
if (stub_sec->contents == NULL)
return FALSE;
size. rawsize is a convenient location to use. */
stub_sec->rawsize = stub_sec->size;
stub_sec->size = 0;
}
if (htab->plt != NULL)
{
unsigned int indx;
bfd_vma plt0;
plt0 = (htab->plt->output_section->vma
+ htab->plt->output_offset
- (htab->glink->output_section->vma
+ htab->glink->output_offset
+ GLINK_CALL_STUB_SIZE));
if (plt0 + 0x80008000 > 0xffffffff)
{
(*_bfd_error_handler) (_(".glink and .plt too far apart"));
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
if (htab->emit_stub_syms)
{
struct elf_link_hash_entry *h;
h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
if (h == NULL)
return FALSE;
if (h->root.type == bfd_link_hash_new)
{
h->root.type = bfd_link_hash_defined;
h->root.u.def.section = htab->glink;
h->root.u.def.value = 0;
h->ref_regular = 1;
h->def_regular = 1;
h->ref_regular_nonweak = 1;
h->forced_local = 1;
h->non_elf = 0;
}
}
p = htab->glink->contents;
bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
p += 4;
bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
p += 4;
bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
p += 4;
bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
p += 4;
bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
p += 4;
bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
p += 4;
bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
p += 4;
bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
p += 4;
bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
p += 4;
bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
p += 4;
bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
p += 4;
bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
p += 4;
bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
p += 4;
bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
p += 4;
bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
p += 4;
bfd_put_32 (htab->glink->owner, BCTR, p);
p += 4;
indx = 0;
while (p < htab->glink->contents + htab->glink->size)
{
if (indx < 0x8000)
{
bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
p += 4;
}
else
{
bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
p += 4;
bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
p += 4;
}
bfd_put_32 (htab->glink->owner,
B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
indx++;
p += 4;
}
htab->glink->rawsize = p - htab->glink->contents;
}
if (htab->brlt->size != 0)
{
htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
htab->brlt->size);
if (htab->brlt->contents == NULL)
return FALSE;
}
if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
{
htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
htab->relbrlt->size);
if (htab->relbrlt->contents == NULL)
return FALSE;
}
bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
for (stub_sec = htab->stub_bfd->sections;
stub_sec != NULL;
stub_sec = stub_sec->next)
if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
{
stub_sec_count += 1;
if (stub_sec->rawsize != stub_sec->size)
break;
}
if (stub_sec != NULL
|| htab->glink->rawsize != htab->glink->size)
{
htab->stub_error = TRUE;
(*_bfd_error_handler) (_("stubs don't match calculated size"));
}
if (htab->stub_error)
return FALSE;
if (stats != NULL)
{
*stats = bfd_malloc (500);
if (*stats == NULL)
return FALSE;
sprintf (*stats, _("linker stubs in %u group%s\n"
" branch %lu\n"
" toc adjust %lu\n"
" long branch %lu\n"
" long toc adj %lu\n"
" plt call %lu"),
stub_sec_count,
stub_sec_count == 1 ? "" : "s",
htab->stub_count[ppc_stub_long_branch - 1],
htab->stub_count[ppc_stub_long_branch_r2off - 1],
htab->stub_count[ppc_stub_plt_branch - 1],
htab->stub_count[ppc_stub_plt_branch_r2off - 1],
htab->stub_count[ppc_stub_plt_call - 1]);
}
return TRUE;
}
static bfd_boolean
undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
{
struct ppc_link_hash_entry *eh;
if (h->root.type == bfd_link_hash_indirect)
return TRUE;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
eh = (struct ppc_link_hash_entry *) h;
if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
return TRUE;
eh->elf.root.type = bfd_link_hash_undefined;
return TRUE;
}
void
ppc64_elf_restore_symbols (struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab = ppc_hash_table (info);
elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
}
discarded sections. */
static unsigned int
ppc64_elf_action_discarded (asection *sec)
{
if (strcmp (".opd", sec->name) == 0)
return 0;
if (strcmp (".toc", sec->name) == 0)
return 0;
if (strcmp (".toc1", sec->name) == 0)
return 0;
return _bfd_elf_default_action_discarded (sec);
}
to handle the relocations for a section.
The relocs are always passed as Rela structures; if the section
actually uses Rel structures, the r_addend field will always be
zero.
This function is responsible for adjust the section contents as
necessary, and (if using Rela relocs and generating a
relocatable output file) adjusting the reloc addend as
necessary.
This function does not have to worry about setting the reloc
address or the reloc symbol index.
LOCAL_SYMS is a pointer to the swapped in local symbols.
LOCAL_SECTIONS is an array giving the section in the input file
corresponding to the st_shndx field of each local symbol.
The global hash table entry for the global symbols can be found
via elf_sym_hashes (input_bfd).
When generating relocatable output, this function must handle
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
going to be the section symbol corresponding to the output
section, which means that the addend must be adjusted
accordingly. */
static bfd_boolean
ppc64_elf_relocate_section (bfd *output_bfd,
struct bfd_link_info *info,
bfd *input_bfd,
asection *input_section,
bfd_byte *contents,
Elf_Internal_Rela *relocs,
Elf_Internal_Sym *local_syms,
asection **local_sections)
{
struct ppc_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
Elf_Internal_Rela outrel;
bfd_byte *loc;
struct got_entry **local_got_ents;
bfd_vma TOCstart;
bfd_boolean ret = TRUE;
bfd_boolean is_opd;
bfd_boolean is_power4 = FALSE;
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
ppc_howto_init ();
htab = ppc_hash_table (info);
if (input_section->owner == htab->stub_bfd)
return TRUE;
local_got_ents = elf_local_got_ents (input_bfd);
TOCstart = elf_gp (output_bfd);
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
rel = relocs;
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
{
enum elf_ppc64_reloc_type r_type;
bfd_vma addend, orig_addend;
bfd_reloc_status_type r;
Elf_Internal_Sym *sym;
asection *sec;
struct elf_link_hash_entry *h_elf;
struct ppc_link_hash_entry *h;
struct ppc_link_hash_entry *fdh;
const char *sym_name;
unsigned long r_symndx, toc_symndx;
char tls_mask, tls_gd, tls_type;
char sym_type;
bfd_vma relocation;
bfd_boolean unresolved_reloc;
bfd_boolean warned;
unsigned long insn, mask;
struct ppc_stub_hash_entry *stub_entry;
bfd_vma max_br_offset;
bfd_vma from;
r_type = ELF64_R_TYPE (rel->r_info);
r_symndx = ELF64_R_SYM (rel->r_info);
symbol of the previous ADDR64 reloc. The symbol gives us the
proper TOC base to use. */
if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
&& rel != relocs
&& ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
&& is_opd)
r_symndx = ELF64_R_SYM (rel[-1].r_info);
sym = NULL;
sec = NULL;
h_elf = NULL;
sym_name = NULL;
unresolved_reloc = FALSE;
warned = FALSE;
orig_addend = rel->r_addend;
if (r_symndx < symtab_hdr->sh_info)
{
long *opd_adjust;
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
sym_type = ELF64_ST_TYPE (sym->st_info);
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
opd_adjust = get_opd_info (sec);
if (opd_adjust != NULL)
{
long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
if (adjust == -1)
relocation = 0;
else
{
and we have edited .opd, adjust the reloc addend so
that ld -r and ld --emit-relocs output is correct.
If it is a reloc against some other .opd symbol,
then the symbol value will be adjusted later. */
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
rel->r_addend += adjust;
else
relocation += adjust;
}
}
if (info->relocatable)
continue;
}
else
{
if (info->relocatable)
continue;
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
r_symndx, symtab_hdr, sym_hashes,
h_elf, sec, relocation,
unresolved_reloc, warned);
sym_name = h_elf->root.root.string;
sym_type = h_elf->type;
}
h = (struct ppc_link_hash_entry *) h_elf;
based on information we collected in tls_optimize. We edit
RELOCS so that --emit-relocs will output something sensible
for the final instruction stream. */
tls_mask = 0;
tls_gd = 0;
toc_symndx = 0;
if (IS_PPC64_TLS_RELOC (r_type))
{
if (h != NULL)
tls_mask = h->tls_mask;
else if (local_got_ents != NULL)
{
char *lgot_masks;
lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
tls_mask = lgot_masks[r_symndx];
}
if (tls_mask == 0 && r_type == R_PPC64_TLS)
{
char *toc_tls;
if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
rel, input_bfd))
return FALSE;
if (toc_tls)
tls_mask = *toc_tls;
}
}
relocs are used with non-tls syms. */
if (r_symndx != 0
&& r_type != R_PPC64_NONE
&& (h == NULL
|| h->elf.root.type == bfd_link_hash_defined
|| h->elf.root.type == bfd_link_hash_defweak)
&& IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
{
if (r_type == R_PPC64_TLS && tls_mask != 0)
;
else
(*_bfd_error_handler)
(sym_type == STT_TLS
? _("%B(%A+0x%lx): %s used with TLS symbol %s")
: _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
input_bfd,
input_section,
(long) rel->r_offset,
ppc64_elf_howto_table[r_type]->name,
sym_name);
}
if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
|| R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
|| (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
|| (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
|| (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
|| (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
|| (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
|| (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
|| (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
|| (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
abort ();
switch (r_type)
{
default:
break;
case R_PPC64_TOC16:
case R_PPC64_TOC16_LO:
case R_PPC64_TOC16_DS:
case R_PPC64_TOC16_LO_DS:
{
char *toc_tls;
int retval;
retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
rel, input_bfd);
if (retval == 0)
return FALSE;
if (toc_tls)
{
tls_mask = *toc_tls;
if (r_type == R_PPC64_TOC16_DS
|| r_type == R_PPC64_TOC16_LO_DS)
{
if (tls_mask != 0
&& (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
goto toctprel;
}
else
{
doing a GD->IE transition. */
if (retval == 2)
{
tls_gd = TLS_TPRELGD;
if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
goto tls_get_addr_check;
}
else if (retval == 3)
{
if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
goto tls_get_addr_check;
}
}
}
}
break;
case R_PPC64_GOT_TPREL16_DS:
case R_PPC64_GOT_TPREL16_LO_DS:
if (tls_mask != 0
&& (tls_mask & TLS_TPREL) == 0)
{
toctprel:
insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
insn &= 31 << 21;
insn |= 0x3c0d0000;
bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
r_type = R_PPC64_TPREL16_HA;
if (toc_symndx != 0)
{
rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
get h, sym, sec etc. right. */
rel--;
continue;
}
else
rel->r_info = ELF64_R_INFO (r_symndx, r_type);
}
break;
case R_PPC64_TLS:
if (tls_mask != 0
&& (tls_mask & TLS_TPREL) == 0)
{
bfd_vma rtra;
insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
if ((insn & ((0x3f << 26) | (31 << 11)))
== ((31 << 26) | (13 << 11)))
rtra = insn & ((1 << 26) - (1 << 16));
else if ((insn & ((0x3f << 26) | (31 << 16)))
== ((31 << 26) | (13 << 16)))
rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
else
abort ();
if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
insn = 14 << 26;
else if ((insn & (31 << 1)) == 23 << 1
&& ((insn & (31 << 6)) < 14 << 6
|| ((insn & (31 << 6)) >= 16 << 6
&& (insn & (31 << 6)) < 24 << 6)))
insn = (32 | ((insn >> 6) & 31)) << 26;
else if ((insn & (31 << 1)) == 21 << 1
&& (insn & (0x1a << 6)) == 0)
insn = (((58 | ((insn >> 6) & 4)) << 26)
| ((insn >> 6) & 1));
else if ((insn & (31 << 1)) == 21 << 1
&& (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
insn = (58 << 26) | 2;
else
abort ();
insn |= rtra;
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
PPC64_TPREL16_LO which is at insn+2. */
rel->r_offset += 2;
r_type = R_PPC64_TPREL16_LO;
if (toc_symndx != 0)
{
rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
get h, sym, sec etc. right. */
rel--;
continue;
}
else
rel->r_info = ELF64_R_INFO (r_symndx, r_type);
}
break;
case R_PPC64_GOT_TLSGD16_HI:
case R_PPC64_GOT_TLSGD16_HA:
tls_gd = TLS_TPRELGD;
if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
goto tls_gdld_hi;
break;
case R_PPC64_GOT_TLSLD16_HI:
case R_PPC64_GOT_TLSLD16_HA:
if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
{
tls_gdld_hi:
if ((tls_mask & tls_gd) != 0)
r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
+ R_PPC64_GOT_TPREL16_DS);
else
{
bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
rel->r_offset -= 2;
r_type = R_PPC64_NONE;
}
rel->r_info = ELF64_R_INFO (r_symndx, r_type);
}
break;
case R_PPC64_GOT_TLSGD16:
case R_PPC64_GOT_TLSGD16_LO:
tls_gd = TLS_TPRELGD;
if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
goto tls_get_addr_check;
break;
case R_PPC64_GOT_TLSLD16:
case R_PPC64_GOT_TLSLD16_LO:
if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
{
tls_get_addr_check:
if (rel + 1 < relend)
{
enum elf_ppc64_reloc_type r_type2;
unsigned long r_symndx2;
struct elf_link_hash_entry *h2;
bfd_vma insn1, insn2, insn3;
bfd_vma offset;
__tls_get_addr. Peek at the reloc to be sure. */
r_type2 = ELF64_R_TYPE (rel[1].r_info);
r_symndx2 = ELF64_R_SYM (rel[1].r_info);
if (r_symndx2 < symtab_hdr->sh_info
|| (r_type2 != R_PPC64_REL14
&& r_type2 != R_PPC64_REL14_BRTAKEN
&& r_type2 != R_PPC64_REL14_BRNTAKEN
&& r_type2 != R_PPC64_REL24))
break;
h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
while (h2->root.type == bfd_link_hash_indirect
|| h2->root.type == bfd_link_hash_warning)
h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
&& h2 != &htab->tls_get_addr_fd->elf))
break;
offset = rel[1].r_offset;
insn1 = bfd_get_32 (output_bfd,
contents + rel->r_offset - 2);
insn3 = bfd_get_32 (output_bfd,
contents + offset + 4);
if ((tls_mask & tls_gd) != 0)
{
insn1 &= (1 << 26) - (1 << 2);
insn1 |= 58 << 26;
insn2 = 0x7c636a14;
rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
if ((tls_mask & TLS_EXPLICIT) == 0)
r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
+ R_PPC64_GOT_TPREL16_DS);
else
r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
rel->r_info = ELF64_R_INFO (r_symndx, r_type);
}
else
{
insn1 = 0x3c6d0000;
insn2 = 0x38630000;
if (tls_gd == 0)
{
r_symndx = 0;
rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
}
else if (toc_symndx != 0)
r_symndx = toc_symndx;
r_type = R_PPC64_TPREL16_HA;
rel->r_info = ELF64_R_INFO (r_symndx, r_type);
rel[1].r_info = ELF64_R_INFO (r_symndx,
R_PPC64_TPREL16_LO);
rel[1].r_offset += 2;
}
if (insn3 == NOP
|| insn3 == CROR_151515 || insn3 == CROR_313131)
{
insn3 = insn2;
insn2 = NOP;
rel[1].r_offset += 4;
}
bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
bfd_put_32 (output_bfd, insn2, contents + offset);
bfd_put_32 (output_bfd, insn3, contents + offset + 4);
if (tls_gd == 0 || toc_symndx != 0)
{
to get h, sym, sec etc. right. */
rel--;
continue;
}
}
}
break;
case R_PPC64_DTPMOD64:
if (rel + 1 < relend
&& rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
&& rel[1].r_offset == rel->r_offset + 8)
{
if ((tls_mask & TLS_GD) == 0)
{
rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
if ((tls_mask & TLS_TPRELGD) != 0)
r_type = R_PPC64_TPREL64;
else
{
bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
r_type = R_PPC64_NONE;
}
rel->r_info = ELF64_R_INFO (r_symndx, r_type);
}
}
else
{
if ((tls_mask & TLS_LD) == 0)
{
bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
r_type = R_PPC64_NONE;
rel->r_info = ELF64_R_INFO (r_symndx, r_type);
}
}
break;
case R_PPC64_TPREL64:
if ((tls_mask & TLS_TPREL) == 0)
{
r_type = R_PPC64_NONE;
rel->r_info = ELF64_R_INFO (r_symndx, r_type);
}
break;
}
insn = 0;
max_br_offset = 1 << 25;
addend = rel->r_addend;
switch (r_type)
{
default:
break;
case R_PPC64_ADDR14_BRTAKEN:
case R_PPC64_REL14_BRTAKEN:
insn = 0x01 << 21;
case R_PPC64_ADDR14_BRNTAKEN:
case R_PPC64_REL14_BRNTAKEN:
insn |= bfd_get_32 (output_bfd,
contents + rel->r_offset) & ~(0x01 << 21);
case R_PPC64_REL14:
max_br_offset = 1 << 15;
case R_PPC64_REL24:
shared objects, need to alter the TOC pointer. This is
done using a linkage stub. A REL24 branching to these
linkage stubs needs to be followed by a nop, as the nop
will be replaced with an instruction to restore the TOC
base pointer. */
stub_entry = NULL;
fdh = h;
if (((h != NULL
&& (((fdh = h->oh) != NULL
&& fdh->elf.plt.plist != NULL)
|| (fdh = h)->elf.plt.plist != NULL))
|| (sec != NULL
&& sec->output_section != NULL
&& sec->id <= htab->top_id
&& (htab->stub_group[sec->id].toc_off
!= htab->stub_group[input_section->id].toc_off)))
&& (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
rel, htab)) != NULL
&& (stub_entry->stub_type == ppc_stub_plt_call
|| stub_entry->stub_type == ppc_stub_plt_branch_r2off
|| stub_entry->stub_type == ppc_stub_long_branch_r2off))
{
bfd_boolean can_plt_call = FALSE;
if (rel->r_offset + 8 <= input_section->size)
{
unsigned long nop;
nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
if (nop == NOP
|| nop == CROR_151515 || nop == CROR_313131)
{
bfd_put_32 (input_bfd, LD_R2_40R1,
contents + rel->r_offset + 4);
can_plt_call = TRUE;
}
}
if (!can_plt_call)
{
if (stub_entry->stub_type == ppc_stub_plt_call)
{
and link, don't require a nop. However, don't
allow tail calls in a shared library as they
will result in r2 being corrupted. */
unsigned long br;
br = bfd_get_32 (input_bfd, contents + rel->r_offset);
if (info->executable && (br & 1) == 0)
can_plt_call = TRUE;
else
stub_entry = NULL;
}
else if (h != NULL
&& strcmp (h->elf.root.root.string,
".__libc_start_main") == 0)
{
can_plt_call = TRUE;
}
else
{
if (strcmp (input_section->output_section->name,
".init") == 0
|| strcmp (input_section->output_section->name,
".fini") == 0)
(*_bfd_error_handler)
(_("%B(%A+0x%lx): automatic multiple TOCs "
"not supported using your crt files; "
"recompile with -mminimal-toc or upgrade gcc"),
input_bfd,
input_section,
(long) rel->r_offset);
else
(*_bfd_error_handler)
(_("%B(%A+0x%lx): sibling call optimization to `%s' "
"does not allow automatic multiple TOCs; "
"recompile with -mminimal-toc or "
"-fno-optimize-sibling-calls, "
"or make `%s' extern"),
input_bfd,
input_section,
(long) rel->r_offset,
sym_name,
sym_name);
bfd_set_error (bfd_error_bad_value);
ret = FALSE;
}
}
if (can_plt_call
&& stub_entry->stub_type == ppc_stub_plt_call)
unresolved_reloc = FALSE;
}
if (stub_entry == NULL
&& get_opd_info (sec) != NULL)
{
bfd_vma off = (relocation + addend
- sec->output_section->vma
- sec->output_offset);
bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
if (dest != (bfd_vma) -1)
{
relocation = dest;
addend = 0;
}
}
branch stub. */
from = (rel->r_offset
+ input_section->output_offset
+ input_section->output_section->vma);
if (stub_entry == NULL
&& (relocation + addend - from + max_br_offset
>= 2 * max_br_offset)
&& r_type != R_PPC64_ADDR14_BRTAKEN
&& r_type != R_PPC64_ADDR14_BRNTAKEN)
stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
htab);
if (stub_entry != NULL)
{
rather than the procedure directly. */
relocation = (stub_entry->stub_offset
+ stub_entry->stub_sec->output_offset
+ stub_entry->stub_sec->output_section->vma);
addend = 0;
}
if (insn != 0)
{
if (is_power4)
{
on CR(BI) insns (BO == 001at or 011at), and 0b01000
for branch on CTR insns (BO == 1a00t or 1a01t). */
if ((insn & (0x14 << 21)) == (0x04 << 21))
insn |= 0x02 << 21;
else if ((insn & (0x14 << 21)) == (0x10 << 21))
insn |= 0x08 << 21;
else
break;
}
else
{
if ((bfd_signed_vma) (relocation + addend - from) < 0)
insn ^= 0x01 << 21;
}
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
}
We can thus call a weak function without first
checking whether the function is defined. */
else if (h != NULL
&& h->elf.root.type == bfd_link_hash_undefweak
&& r_type == R_PPC64_REL24
&& relocation == 0
&& addend == 0)
{
bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
continue;
}
break;
}
tls_type = 0;
switch (r_type)
{
default:
(*_bfd_error_handler)
(_("%B: unknown relocation type %d for symbol %s"),
input_bfd, (int) r_type, sym_name);
bfd_set_error (bfd_error_bad_value);
ret = FALSE;
continue;
case R_PPC64_NONE:
case R_PPC64_TLS:
case R_PPC64_GNU_VTINHERIT:
case R_PPC64_GNU_VTENTRY:
continue;
address in the GOT as relocation value instead of the
symbol's value itself. Also, create a GOT entry for the
symbol and put the symbol value there. */
case R_PPC64_GOT_TLSGD16:
case R_PPC64_GOT_TLSGD16_LO:
case R_PPC64_GOT_TLSGD16_HI:
case R_PPC64_GOT_TLSGD16_HA:
tls_type = TLS_TLS | TLS_GD;
goto dogot;
case R_PPC64_GOT_TLSLD16:
case R_PPC64_GOT_TLSLD16_LO:
case R_PPC64_GOT_TLSLD16_HI:
case R_PPC64_GOT_TLSLD16_HA:
tls_type = TLS_TLS | TLS_LD;
goto dogot;
case R_PPC64_GOT_TPREL16_DS:
case R_PPC64_GOT_TPREL16_LO_DS:
case R_PPC64_GOT_TPREL16_HI:
case R_PPC64_GOT_TPREL16_HA:
tls_type = TLS_TLS | TLS_TPREL;
goto dogot;
case R_PPC64_GOT_DTPREL16_DS:
case R_PPC64_GOT_DTPREL16_LO_DS:
case R_PPC64_GOT_DTPREL16_HI:
case R_PPC64_GOT_DTPREL16_HA:
tls_type = TLS_TLS | TLS_DTPREL;
goto dogot;
case R_PPC64_GOT16:
case R_PPC64_GOT16_LO:
case R_PPC64_GOT16_HI:
case R_PPC64_GOT16_HA:
case R_PPC64_GOT16_DS:
case R_PPC64_GOT16_LO_DS:
dogot:
{
offset table. */
asection *got;
bfd_vma *offp;
bfd_vma off;
unsigned long indx = 0;
if (tls_type == (TLS_TLS | TLS_LD)
&& (h == NULL
|| !h->elf.def_dynamic))
offp = &ppc64_tlsld_got (input_bfd)->offset;
else
{
struct got_entry *ent;
if (h != NULL)
{
bfd_boolean dyn = htab->elf.dynamic_sections_created;
if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
&h->elf)
|| (info->shared
&& SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
-Bsymbolic link and the symbol is defined
locally, or the symbol was forced to be local
because of a version file. */
;
else
{
indx = h->elf.dynindx;
unresolved_reloc = FALSE;
}
ent = h->elf.got.glist;
}
else
{
if (local_got_ents == NULL)
abort ();
ent = local_got_ents[r_symndx];
}
for (; ent != NULL; ent = ent->next)
if (ent->addend == orig_addend
&& ent->owner == input_bfd
&& ent->tls_type == tls_type)
break;
if (ent == NULL)
abort ();
offp = &ent->got.offset;
}
got = ppc64_elf_tdata (input_bfd)->got;
if (got == NULL)
abort ();
least significant bit to record whether we have already
processed this entry. */
off = *offp;
if ((off & 1) != 0)
off &= ~1;
else
{
the case of TLSLD where we'll use one entry per
module. */
asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
*offp = off | 1;
if ((info->shared || indx != 0)
&& (h == NULL
|| ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
|| h->elf.root.type != bfd_link_hash_undefweak))
{
outrel.r_offset = (got->output_section->vma
+ got->output_offset
+ off);
outrel.r_addend = addend;
if (tls_type & (TLS_LD | TLS_GD))
{
outrel.r_addend = 0;
outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
if (tls_type == (TLS_TLS | TLS_GD))
{
loc = relgot->contents;
loc += (relgot->reloc_count++
* sizeof (Elf64_External_Rela));
bfd_elf64_swap_reloca_out (output_bfd,
&outrel, loc);
outrel.r_offset += 8;
outrel.r_addend = addend;
outrel.r_info
= ELF64_R_INFO (indx, R_PPC64_DTPREL64);
}
}
else if (tls_type == (TLS_TLS | TLS_DTPREL))
outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
else if (tls_type == (TLS_TLS | TLS_TPREL))
outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
else if (indx == 0)
{
outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
of prelink. */
loc = got->contents + off;
bfd_put_64 (output_bfd, outrel.r_addend + relocation,
loc);
}
else
outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
{
outrel.r_addend += relocation;
if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
outrel.r_addend -= htab->elf.tls_sec->vma;
}
loc = relgot->contents;
loc += (relgot->reloc_count++
* sizeof (Elf64_External_Rela));
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
}
emitting a reloc. */
else
{
relocation += addend;
if (tls_type == (TLS_TLS | TLS_LD))
relocation = 1;
else if (tls_type != 0)
{
relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
if (tls_type == (TLS_TLS | TLS_TPREL))
relocation += DTP_OFFSET - TP_OFFSET;
if (tls_type == (TLS_TLS | TLS_GD))
{
bfd_put_64 (output_bfd, relocation,
got->contents + off + 8);
relocation = 1;
}
}
bfd_put_64 (output_bfd, relocation,
got->contents + off);
}
}
if (off >= (bfd_vma) -2)
abort ();
relocation = got->output_offset + off;
addend = -TOC_BASE_OFF;
}
break;
case R_PPC64_PLT16_HA:
case R_PPC64_PLT16_HI:
case R_PPC64_PLT16_LO:
case R_PPC64_PLT32:
case R_PPC64_PLT64:
procedure linkage table. */
without using the procedure linkage table. */
if (h == NULL)
break;
symbol. This happens when statically linking PIC code,
or when using -Bsymbolic. Go find a match if there is a
PLT entry. */
if (htab->plt != NULL)
{
struct plt_entry *ent;
for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
if (ent->addend == orig_addend
&& ent->plt.offset != (bfd_vma) -1)
{
relocation = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ ent->plt.offset);
unresolved_reloc = FALSE;
}
}
break;
case R_PPC64_TOC:
relocation = TOCstart;
if (r_symndx == 0)
relocation += htab->stub_group[input_section->id].toc_off;
else if (unresolved_reloc)
;
else if (sec != NULL && sec->id <= htab->top_id)
relocation += htab->stub_group[sec->id].toc_off;
else
unresolved_reloc = TRUE;
goto dodyn2;
which is the address of the start of the TOC plus 0x8000.
The TOC consists of sections .got, .toc, .tocbss, and .plt,
in this order. */
case R_PPC64_TOC16:
case R_PPC64_TOC16_LO:
case R_PPC64_TOC16_HI:
case R_PPC64_TOC16_DS:
case R_PPC64_TOC16_LO_DS:
case R_PPC64_TOC16_HA:
addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
break;
case R_PPC64_SECTOFF:
case R_PPC64_SECTOFF_LO:
case R_PPC64_SECTOFF_HI:
case R_PPC64_SECTOFF_DS:
case R_PPC64_SECTOFF_LO_DS:
case R_PPC64_SECTOFF_HA:
if (sec != NULL)
addend -= sec->output_section->vma;
break;
case R_PPC64_REL14:
case R_PPC64_REL14_BRNTAKEN:
case R_PPC64_REL14_BRTAKEN:
case R_PPC64_REL24:
break;
case R_PPC64_TPREL16:
case R_PPC64_TPREL16_LO:
case R_PPC64_TPREL16_HI:
case R_PPC64_TPREL16_HA:
case R_PPC64_TPREL16_DS:
case R_PPC64_TPREL16_LO_DS:
case R_PPC64_TPREL16_HIGHER:
case R_PPC64_TPREL16_HIGHERA:
case R_PPC64_TPREL16_HIGHEST:
case R_PPC64_TPREL16_HIGHESTA:
addend -= htab->elf.tls_sec->vma + TP_OFFSET;
if (info->shared)
libs as they will result in DT_TEXTREL being set, but
support them anyway. */
goto dodyn;
break;
case R_PPC64_DTPREL16:
case R_PPC64_DTPREL16_LO:
case R_PPC64_DTPREL16_HI:
case R_PPC64_DTPREL16_HA:
case R_PPC64_DTPREL16_DS:
case R_PPC64_DTPREL16_LO_DS:
case R_PPC64_DTPREL16_HIGHER:
case R_PPC64_DTPREL16_HIGHERA:
case R_PPC64_DTPREL16_HIGHEST:
case R_PPC64_DTPREL16_HIGHESTA:
addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
break;
case R_PPC64_DTPMOD64:
relocation = 1;
addend = 0;
goto dodyn;
case R_PPC64_TPREL64:
addend -= htab->elf.tls_sec->vma + TP_OFFSET;
goto dodyn;
case R_PPC64_DTPREL64:
addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
dynamic object. */
case R_PPC64_REL30:
case R_PPC64_REL32:
case R_PPC64_REL64:
case R_PPC64_ADDR14:
case R_PPC64_ADDR14_BRNTAKEN:
case R_PPC64_ADDR14_BRTAKEN:
case R_PPC64_ADDR16:
case R_PPC64_ADDR16_DS:
case R_PPC64_ADDR16_HA:
case R_PPC64_ADDR16_HI:
case R_PPC64_ADDR16_HIGHER:
case R_PPC64_ADDR16_HIGHERA:
case R_PPC64_ADDR16_HIGHEST:
case R_PPC64_ADDR16_HIGHESTA:
case R_PPC64_ADDR16_LO:
case R_PPC64_ADDR16_LO_DS:
case R_PPC64_ADDR24:
case R_PPC64_ADDR32:
case R_PPC64_ADDR64:
case R_PPC64_UADDR16:
case R_PPC64_UADDR32:
case R_PPC64_UADDR64:
from removed linkonce sections, or sections discarded by
a linker script. */
dodyn:
if (r_symndx == 0)
break;
dodyn2:
if ((input_section->flags & SEC_ALLOC) == 0)
break;
if (NO_OPD_RELOCS && is_opd)
break;
if ((info->shared
&& (h == NULL
|| ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
|| h->elf.root.type != bfd_link_hash_undefweak)
&& (MUST_BE_DYN_RELOC (r_type)
|| !SYMBOL_CALLS_LOCAL (info, &h->elf)))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
&& h != NULL
&& h->elf.dynindx != -1
&& !h->elf.non_got_ref
&& h->elf.def_dynamic
&& !h->elf.def_regular))
{
Elf_Internal_Rela outrel;
bfd_boolean skip, relocate;
asection *sreloc;
bfd_byte *loc;
bfd_vma out_off;
are copied into the output file to be resolved at run
time. */
skip = FALSE;
relocate = FALSE;
out_off = _bfd_elf_section_offset (output_bfd, info,
input_section, rel->r_offset);
if (out_off == (bfd_vma) -1)
skip = TRUE;
else if (out_off == (bfd_vma) -2)
skip = TRUE, relocate = TRUE;
out_off += (input_section->output_section->vma
+ input_section->output_offset);
outrel.r_offset = out_off;
outrel.r_addend = rel->r_addend;
if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
|| (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
|| (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
|| (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
if (skip)
memset (&outrel, 0, sizeof outrel);
else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
&& !is_opd
&& r_type != R_PPC64_TOC)
outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
else
{
or this is an opd section reloc which must point
at a local function. */
outrel.r_addend += relocation;
if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
{
if (is_opd && h != NULL)
{
when building shared libraries and we
reference a function in another shared
lib. The same thing happens for a weak
definition in an application that's
overridden by a strong definition in a
shared lib. (I believe this is a generic
bug in binutils handling of weak syms.)
In these cases we won't use the opd
entry in this lib. */
unresolved_reloc = FALSE;
}
outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
Prelink also wants simple and consistent rules
for relocs. This make all RELATIVE relocs have
*r_offset equal to r_addend. */
relocate = TRUE;
}
else
{
long indx = 0;
if (bfd_is_abs_section (sec))
;
else if (sec == NULL || sec->owner == NULL)
{
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
else
{
asection *osec;
osec = sec->output_section;
indx = elf_section_data (osec)->dynindx;
against a section symbol, so subtract out
the output section's address but not the
offset of the input section in the output
section. */
outrel.r_addend -= osec->vma;
}
outrel.r_info = ELF64_R_INFO (indx, r_type);
}
}
sreloc = elf_section_data (input_section)->sreloc;
if (sreloc == NULL)
abort ();
if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
>= sreloc->size)
abort ();
loc = sreloc->contents;
loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
be computed at runtime, so there's no need to do
anything now. However, for the sake of prelink ensure
that the section contents are a known value. */
if (! relocate)
{
unresolved_reloc = FALSE;
ignores section contents except for the special
case of .opd where the contents might be accessed
before relocation. Choose zero, as that won't
cause reloc overflow. */
relocation = 0;
addend = 0;
to improve backward compatibility with older
versions of ld. */
if (r_type == R_PPC64_ADDR64)
addend = outrel.r_addend;
else if (ppc64_elf_howto_table[r_type]->pc_relative)
addend = (input_section->output_section->vma
+ input_section->output_offset
+ rel->r_offset);
}
}
break;
case R_PPC64_COPY:
case R_PPC64_GLOB_DAT:
case R_PPC64_JMP_SLOT:
case R_PPC64_RELATIVE:
files. */
case R_PPC64_PLTGOT16:
case R_PPC64_PLTGOT16_DS:
case R_PPC64_PLTGOT16_HA:
case R_PPC64_PLTGOT16_HI:
case R_PPC64_PLTGOT16_LO:
case R_PPC64_PLTGOT16_LO_DS:
case R_PPC64_PLTREL32:
case R_PPC64_PLTREL64:
(*_bfd_error_handler)
(_("%B: relocation %s is not supported for symbol %s."),
input_bfd,
ppc64_elf_howto_table[r_type]->name, sym_name);
bfd_set_error (bfd_error_invalid_operation);
ret = FALSE;
continue;
}
switch (r_type)
{
default:
break;
case R_PPC64_ADDR16_HA:
case R_PPC64_ADDR16_HIGHERA:
case R_PPC64_ADDR16_HIGHESTA:
case R_PPC64_GOT16_HA:
case R_PPC64_PLTGOT16_HA:
case R_PPC64_PLT16_HA:
case R_PPC64_TOC16_HA:
case R_PPC64_SECTOFF_HA:
case R_PPC64_TPREL16_HA:
case R_PPC64_DTPREL16_HA:
case R_PPC64_GOT_TLSGD16_HA:
case R_PPC64_GOT_TLSLD16_HA:
case R_PPC64_GOT_TPREL16_HA:
case R_PPC64_GOT_DTPREL16_HA:
case R_PPC64_TPREL16_HIGHER:
case R_PPC64_TPREL16_HIGHERA:
case R_PPC64_TPREL16_HIGHEST:
case R_PPC64_TPREL16_HIGHESTA:
case R_PPC64_DTPREL16_HIGHER:
case R_PPC64_DTPREL16_HIGHERA:
case R_PPC64_DTPREL16_HIGHEST:
case R_PPC64_DTPREL16_HIGHESTA:
that's not actually defined anywhere. In that case,
'sec' would be NULL, and we should leave the symbol
alone (it will be set to zero elsewhere in the link). */
if (sec != NULL)
Bits 0:15 are not used. */
addend += 0x8000;
break;
case R_PPC64_ADDR16_DS:
case R_PPC64_ADDR16_LO_DS:
case R_PPC64_GOT16_DS:
case R_PPC64_GOT16_LO_DS:
case R_PPC64_PLT16_LO_DS:
case R_PPC64_SECTOFF_DS:
case R_PPC64_SECTOFF_LO_DS:
case R_PPC64_TOC16_DS:
case R_PPC64_TOC16_LO_DS:
case R_PPC64_PLTGOT16_DS:
case R_PPC64_PLTGOT16_LO_DS:
case R_PPC64_GOT_TPREL16_DS:
case R_PPC64_GOT_TPREL16_LO_DS:
case R_PPC64_GOT_DTPREL16_DS:
case R_PPC64_GOT_DTPREL16_LO_DS:
case R_PPC64_TPREL16_DS:
case R_PPC64_TPREL16_LO_DS:
case R_PPC64_DTPREL16_DS:
case R_PPC64_DTPREL16_LO_DS:
insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
mask = 3;
a multiple of 16. This is somewhat of a hack, but the
"correct" way to do this by defining _DQ forms of all the
_DS relocs bloats all reloc switches in this file. It
doesn't seem to make much sense to use any of these relocs
in data, so testing the insn should be safe. */
if ((insn & (0x3f << 26)) == (56u << 26))
mask = 15;
if (((relocation + addend) & mask) != 0)
{
(*_bfd_error_handler)
(_("%B: error: relocation %s not a multiple of %d"),
input_bfd,
ppc64_elf_howto_table[r_type]->name,
mask + 1);
bfd_set_error (bfd_error_bad_value);
ret = FALSE;
continue;
}
break;
}
because such sections are not SEC_ALLOC and thus ld.so will
not process them. */
if (unresolved_reloc
&& !((input_section->flags & SEC_DEBUGGING) != 0
&& h->elf.def_dynamic))
{
(*_bfd_error_handler)
(_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
input_bfd,
input_section,
(long) rel->r_offset,
ppc64_elf_howto_table[(int) r_type]->name,
h->elf.root.root.string);
ret = FALSE;
}
r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
input_bfd,
input_section,
contents,
rel->r_offset,
relocation,
addend);
if (r != bfd_reloc_ok)
{
if (sym_name == NULL)
sym_name = "(null)";
if (r == bfd_reloc_overflow)
{
if (warned)
continue;
if (h != NULL
&& h->elf.root.type == bfd_link_hash_undefweak
&& ppc64_elf_howto_table[r_type]->pc_relative)
{
detects the symbol is undefined. If this is the case,
we can safely ignore the overflow. If not, the
program is hosed anyway, and a little warning isn't
going to help. */
continue;
}
if (!((*info->callbacks->reloc_overflow)
(info, (h ? &h->elf.root : NULL), sym_name,
ppc64_elf_howto_table[r_type]->name,
orig_addend, input_bfd, input_section, rel->r_offset)))
return FALSE;
}
else
{
(*_bfd_error_handler)
(_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
input_bfd,
input_section,
(long) rel->r_offset,
ppc64_elf_howto_table[r_type]->name,
sym_name,
(int) r);
ret = FALSE;
}
}
}
returns, reloc offsets and addends for this section will be
adjusted. Worse, reloc symbol indices will be for the output
file rather than the input. Save a copy of the relocs for
opd_entry_value. */
if (is_opd && (info->emitrelocations || info->relocatable))
{
bfd_size_type amt;
amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
rel = bfd_alloc (input_bfd, amt);
BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
if (rel == NULL)
return FALSE;
memcpy (rel, relocs, amt);
}
return ret;
}
static bfd_boolean
ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
const char *name ATTRIBUTE_UNUSED,
Elf_Internal_Sym *elfsym,
asection *input_sec,
struct elf_link_hash_entry *h)
{
long *opd_adjust, adjust;
bfd_vma value;
if (h != NULL)
return TRUE;
opd_adjust = get_opd_info (input_sec);
if (opd_adjust == NULL)
return TRUE;
value = elfsym->st_value - input_sec->output_offset;
if (!info->relocatable)
value -= input_sec->output_section->vma;
adjust = opd_adjust[value / 8];
if (adjust == -1)
elfsym->st_value = 0;
else
elfsym->st_value += adjust;
return TRUE;
}
dynamic sections here. */
static bfd_boolean
ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
struct bfd_link_info *info,
struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym)
{
struct ppc_link_hash_table *htab;
bfd *dynobj;
struct plt_entry *ent;
Elf_Internal_Rela rela;
bfd_byte *loc;
htab = ppc_hash_table (info);
dynobj = htab->elf.dynobj;
for (ent = h->plt.plist; ent != NULL; ent = ent->next)
if (ent->plt.offset != (bfd_vma) -1)
{
table. Set it up. */
if (htab->plt == NULL
|| htab->relplt == NULL
|| htab->glink == NULL)
abort ();
fill in the PLT entry. */
rela.r_offset = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ ent->plt.offset);
rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
rela.r_addend = ent->addend;
loc = htab->relplt->contents;
loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
* sizeof (Elf64_External_Rela));
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
}
if (h->needs_copy)
{
Elf_Internal_Rela rela;
bfd_byte *loc;
if (h->dynindx == -1
|| (h->root.type != bfd_link_hash_defined
&& h->root.type != bfd_link_hash_defweak)
|| htab->relbss == NULL)
abort ();
rela.r_offset = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
rela.r_addend = 0;
loc = htab->relbss->contents;
loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
}
if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
sym->st_shndx = SHN_ABS;
return TRUE;
}
dynamic linker, before writing them out. */
static enum elf_reloc_type_class
ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
{
enum elf_ppc64_reloc_type r_type;
r_type = ELF64_R_TYPE (rela->r_info);
switch (r_type)
{
case R_PPC64_RELATIVE:
return reloc_class_relative;
case R_PPC64_JMP_SLOT:
return reloc_class_plt;
case R_PPC64_COPY:
return reloc_class_copy;
default:
return reloc_class_normal;
}
}
static bfd_boolean
ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
struct bfd_link_info *info)
{
struct ppc_link_hash_table *htab;
bfd *dynobj;
asection *sdyn;
htab = ppc_hash_table (info);
dynobj = htab->elf.dynobj;
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
if (htab->elf.dynamic_sections_created)
{
Elf64_External_Dyn *dyncon, *dynconend;
if (sdyn == NULL || htab->got == NULL)
abort ();
dyncon = (Elf64_External_Dyn *) sdyn->contents;
dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
asection *s;
bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
switch (dyn.d_tag)
{
default:
continue;
case DT_PPC64_GLINK:
s = htab->glink;
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
of glink rather than the first entry point, which is
what ld.so needs, and now have a bigger stub to
support automatic multiple TOCs. */
dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
break;
case DT_PPC64_OPD:
s = bfd_get_section_by_name (output_bfd, ".opd");
if (s == NULL)
continue;
dyn.d_un.d_ptr = s->vma;
break;
case DT_PPC64_OPDSZ:
s = bfd_get_section_by_name (output_bfd, ".opd");
if (s == NULL)
continue;
dyn.d_un.d_val = s->size;
break;
case DT_PLTGOT:
s = htab->plt;
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
break;
case DT_JMPREL:
s = htab->relplt;
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
break;
case DT_PLTRELSZ:
dyn.d_un.d_val = htab->relplt->size;
break;
case DT_RELASZ:
overall reloc count. */
s = htab->relplt;
if (s == NULL)
continue;
dyn.d_un.d_val -= s->size;
break;
case DT_RELA:
If .rela.plt is the first .rela section, we adjust
DT_RELA to not include it. */
s = htab->relplt;
if (s == NULL)
continue;
if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
continue;
dyn.d_un.d_ptr += s->size;
break;
}
bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
}
}
if (htab->got != NULL && htab->got->size != 0)
{
We use it to hold the link-time TOCbase. */
bfd_put_64 (output_bfd,
elf_gp (output_bfd) + TOC_BASE_OFF,
htab->got->contents);
elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
}
if (htab->plt != NULL && htab->plt->size != 0)
{
elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
= PLT_ENTRY_SIZE;
}
since we didn't add them to DYNOBJ. We know dynobj is the first
bfd. */
while ((dynobj = dynobj->link_next) != NULL)
{
asection *s;
if (!is_ppc64_elf_target (dynobj->xvec))
continue;
s = ppc64_elf_tdata (dynobj)->got;
if (s != NULL
&& s->size != 0
&& s->output_section != bfd_abs_section_ptr
&& !bfd_set_section_contents (output_bfd, s->output_section,
s->contents, s->output_offset,
s->size))
return FALSE;
s = ppc64_elf_tdata (dynobj)->relgot;
if (s != NULL
&& s->size != 0
&& s->output_section != bfd_abs_section_ptr
&& !bfd_set_section_contents (output_bfd, s->output_section,
s->contents, s->output_offset,
s->size))
return FALSE;
}
return TRUE;
}
#include "elf64-target.h"
