Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
2004, 2005, 2006 Free Software Foundation, Inc.
Written by Ian Lance Taylor, Cygnus Support.
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. */
information may not match the final PowerPC ELF ABI. It includes
suggestions from the in-progress Embedded PowerPC ABI, and that
information may also not match. */
#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/ppc.h"
#include "elf32-ppc.h"
#include "elf-vxworks.h"
static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type ppc_elf_unhandled_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
#define BRANCH_PREDICT_BIT 0x200000
#define RA_REGISTER_MASK 0x001f0000
#define RA_REGISTER_SHIFT 16
section. */
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
#define PLT_NUM_SINGLE_ENTRIES 8192
#define GLINK_PLTRESOLVE 16*4
#define GLINK_ENTRY_SIZE 4*4
#define VXWORKS_PLT_ENTRY_SIZE 32
static const bfd_vma ppc_elf_vxworks_plt_entry
[VXWORKS_PLT_ENTRY_SIZE / 4] =
{
0x3d800000,
0x818c0000,
0x7d8903a6,
0x4e800420,
0x39600000,
0x48000000,
0x60000000,
0x60000000,
};
static const bfd_vma ppc_elf_vxworks_pic_plt_entry
[VXWORKS_PLT_ENTRY_SIZE / 4] =
{
0x3d9e0000,
0x818c0000,
0x7d8903a6,
0x4e800420,
0x39600000,
0x48000000,
0x60000000,
0x60000000,
};
#define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
static const bfd_vma ppc_elf_vxworks_plt0_entry
[VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
{
0x3d800000,
0x398c0000,
0x800c0008,
0x7c0903a6,
0x818c0004,
0x4e800420,
0x60000000,
0x60000000,
};
static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
[VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
{
0x819e0008,
0x7d8903a6,
0x819e0004,
0x4e800420,
0x60000000,
0x60000000,
0x60000000,
0x60000000,
};
.rela.plt.unloaded, for the kernel loader. */
#define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
#define VXWORKS_PLTRESOLVE_RELOCS 2
a shared library. */
#define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
#define ADDIS_11_11 0x3d6b0000
#define ADDIS_11_30 0x3d7e0000
#define ADDIS_12_12 0x3d8c0000
#define ADDI_11_11 0x396b0000
#define ADD_0_11_11 0x7c0b5a14
#define ADD_11_0_11 0x7d605a14
#define B 0x48000000
#define BCL_20_31 0x429f0005
#define BCTR 0x4e800420
#define LIS_11 0x3d600000
#define LIS_12 0x3d800000
#define LWZU_0_12 0x840c0000
#define LWZ_0_12 0x800c0000
#define LWZ_11_11 0x816b0000
#define LWZ_11_30 0x817e0000
#define LWZ_12_12 0x818c0000
#define MFLR_0 0x7c0802a6
#define MFLR_12 0x7d8802a6
#define MTCTR_0 0x7c0903a6
#define MTCTR_11 0x7d6903a6
#define MTLR_0 0x7c0803a6
#define NOP 0x60000000
#define SUB_11_11_12 0x7d6c5850
#define TP_OFFSET 0x7000
#define DTP_OFFSET 0x8000
static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
static reloc_howto_type ppc_elf_howto_raw[] = {
HOWTO (R_PPC_NONE,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_NONE",
FALSE,
0,
0,
FALSE),
HOWTO (R_PPC_ADDR32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_ADDR32",
FALSE,
0,
0xffffffff,
FALSE),
FIXME: we don't check that, we just clear them. */
HOWTO (R_PPC_ADDR24,
0,
2,
26,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_ADDR24",
FALSE,
0,
0x3fffffc,
FALSE),
HOWTO (R_PPC_ADDR16,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_ADDR16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_ADDR16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC_ADDR16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_ADDR16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC_ADDR16_HI",
FALSE,
0,
0xffff,
FALSE),
the low 16 bits, treated as a signed number, is negative. */
HOWTO (R_PPC_ADDR16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_addr16_ha_reloc,
"R_PPC_ADDR16_HA",
FALSE,
0,
0xffff,
FALSE),
FIXME: we don't check that, we just clear them. */
HOWTO (R_PPC_ADDR14,
0,
2,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_ADDR14",
FALSE,
0,
0xfffc,
FALSE),
indicate that the branch is expected to be taken. The lower two
bits must be zero. */
HOWTO (R_PPC_ADDR14_BRTAKEN,
0,
2,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_ADDR14_BRTAKEN",
FALSE,
0,
0xfffc,
FALSE),
indicate that the branch is not expected to be taken. The lower
two bits must be zero. */
HOWTO (R_PPC_ADDR14_BRNTAKEN,
0,
2,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_ADDR14_BRNTAKEN",
FALSE,
0,
0xfffc,
FALSE),
HOWTO (R_PPC_REL24,
0,
2,
26,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC_REL24",
FALSE,
0,
0x3fffffc,
TRUE),
HOWTO (R_PPC_REL14,
0,
2,
16,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC_REL14",
FALSE,
0,
0xfffc,
TRUE),
the branch is expected to be taken. The lower two bits must be
zero. */
HOWTO (R_PPC_REL14_BRTAKEN,
0,
2,
16,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC_REL14_BRTAKEN",
FALSE,
0,
0xfffc,
TRUE),
the branch is not expected to be taken. The lower two bits must
be zero. */
HOWTO (R_PPC_REL14_BRNTAKEN,
0,
2,
16,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC_REL14_BRNTAKEN",
FALSE,
0,
0xfffc,
TRUE),
symbol. */
HOWTO (R_PPC_GOT16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC_GOT16",
FALSE,
0,
0xffff,
FALSE),
the symbol. */
HOWTO (R_PPC_GOT16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC_GOT16_LO",
FALSE,
0,
0xffff,
FALSE),
the symbol. */
HOWTO (R_PPC_GOT16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_GOT16_HI",
FALSE,
0,
0xffff,
FALSE),
the symbol. */
HOWTO (R_PPC_GOT16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
ppc_elf_addr16_ha_reloc,
"R_PPC_GOT16_HA",
FALSE,
0,
0xffff,
FALSE),
entry for the symbol. */
HOWTO (R_PPC_PLTREL24,
0,
2,
26,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC_PLTREL24",
FALSE,
0,
0x3fffffc,
TRUE),
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_PPC_COPY,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_COPY",
FALSE,
0,
0,
FALSE),
entries. */
HOWTO (R_PPC_GLOB_DAT,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_GLOB_DAT",
FALSE,
0,
0xffffffff,
FALSE),
HOWTO (R_PPC_JMP_SLOT,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_JMP_SLOT",
FALSE,
0,
0,
FALSE),
longword is set to the load address of the object, plus the
addend. */
HOWTO (R_PPC_RELATIVE,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_RELATIVE",
FALSE,
0,
0xffffffff,
FALSE),
object rather than the final value. Normally used for
_GLOBAL_OFFSET_TABLE_. */
HOWTO (R_PPC_LOCAL24PC,
0,
2,
26,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC_LOCAL24PC",
FALSE,
0,
0x3fffffc,
TRUE),
HOWTO (R_PPC_UADDR32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_UADDR32",
FALSE,
0,
0xffffffff,
FALSE),
HOWTO (R_PPC_UADDR16,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_UADDR16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_REL32,
0,
2,
32,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_REL32",
FALSE,
0,
0xffffffff,
TRUE),
FIXME: not supported. */
HOWTO (R_PPC_PLT32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_PLT32",
FALSE,
0,
0,
FALSE),
FIXME: not supported. */
HOWTO (R_PPC_PLTREL32,
0,
2,
32,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_PLTREL32",
FALSE,
0,
0,
TRUE),
the symbol. */
HOWTO (R_PPC_PLT16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC_PLT16_LO",
FALSE,
0,
0xffff,
FALSE),
the symbol. */
HOWTO (R_PPC_PLT16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_PLT16_HI",
FALSE,
0,
0xffff,
FALSE),
the symbol. */
HOWTO (R_PPC_PLT16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
ppc_elf_addr16_ha_reloc,
"R_PPC_PLT16_HA",
FALSE,
0,
0xffff,
FALSE),
small data items. */
HOWTO (R_PPC_SDAREL16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC_SDAREL16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_SECTOFF,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_SECTOFF",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_SECTOFF_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC_SECTOFF_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_SECTOFF_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_SECTOFF_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_SECTOFF_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
ppc_elf_addr16_ha_reloc,
"R_PPC_SECTOFF_HA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_TLS,
0,
2,
32,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC_TLS",
FALSE,
0,
0,
FALSE),
definition of its TLS sym. */
HOWTO (R_PPC_DTPMOD32,
0,
2,
32,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_DTPMOD32",
FALSE,
0,
0xffffffff,
FALSE),
of sym+add and the base address of the thread-local storage block that
contains the definition of sym, minus 0x8000. */
HOWTO (R_PPC_DTPREL32,
0,
2,
32,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_DTPREL32",
FALSE,
0,
0xffffffff,
FALSE),
HOWTO (R_PPC_DTPREL16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc_elf_unhandled_reloc,
"R_PPC_DTPREL16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_DTPREL16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_DTPREL16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_DTPREL16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_DTPREL16_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_DTPREL16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_DTPREL16_HA",
FALSE,
0,
0xffff,
FALSE),
sym+add and the value of the thread pointer (r13). */
HOWTO (R_PPC_TPREL32,
0,
2,
32,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_TPREL32",
FALSE,
0,
0xffffffff,
FALSE),
HOWTO (R_PPC_TPREL16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc_elf_unhandled_reloc,
"R_PPC_TPREL16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_TPREL16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_TPREL16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_TPREL16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_TPREL16_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_TPREL16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_TPREL16_HA",
FALSE,
0,
0xffff,
FALSE),
with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
to the first entry. */
HOWTO (R_PPC_GOT_TLSGD16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_TLSGD16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_GOT_TLSGD16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_TLSGD16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_GOT_TLSGD16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_TLSGD16_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_GOT_TLSGD16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_TLSGD16_HA",
FALSE,
0,
0xffff,
FALSE),
with values (sym+add)@dtpmod and zero, and computes the offset to the
first entry. */
HOWTO (R_PPC_GOT_TLSLD16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_TLSLD16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_GOT_TLSLD16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_TLSLD16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_GOT_TLSLD16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_TLSLD16_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_GOT_TLSLD16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_TLSLD16_HA",
FALSE,
0,
0xffff,
FALSE),
the offset to the entry. */
HOWTO (R_PPC_GOT_DTPREL16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_DTPREL16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_GOT_DTPREL16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_DTPREL16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_GOT_DTPREL16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_DTPREL16_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_GOT_DTPREL16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_DTPREL16_HA",
FALSE,
0,
0xffff,
FALSE),
offset to the entry. */
HOWTO (R_PPC_GOT_TPREL16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_TPREL16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_GOT_TPREL16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_TPREL16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_GOT_TPREL16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_TPREL16_HI",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_GOT_TPREL16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_unhandled_reloc,
"R_PPC_GOT_TPREL16_HA",
FALSE,
0,
0xffff,
FALSE),
in the SVR4 ELF ABI. */
HOWTO (R_PPC_EMB_NADDR32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_EMB_NADDR32",
FALSE,
0,
0xffffffff,
FALSE),
HOWTO (R_PPC_EMB_NADDR16,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_EMB_NADDR16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_EMB_NADDR16_LO,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC_EMB_ADDR16_LO",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_EMB_NADDR16_HI,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC_EMB_NADDR16_HI",
FALSE,
0,
0xffff,
FALSE),
plus 1 if the contents of the low 16 bits, treated as a signed number,
is negative. */
HOWTO (R_PPC_EMB_NADDR16_HA,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
ppc_elf_addr16_ha_reloc,
"R_PPC_EMB_NADDR16_HA",
FALSE,
0,
0xffff,
FALSE),
address in the .sdata section, and returning the offset from
_SDA_BASE_ for that relocation. */
HOWTO (R_PPC_EMB_SDAI16,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_EMB_SDAI16",
FALSE,
0,
0xffff,
FALSE),
address in the .sdata2 section, and returning the offset from
_SDA2_BASE_ for that relocation. */
HOWTO (R_PPC_EMB_SDA2I16,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_EMB_SDA2I16",
FALSE,
0,
0xffff,
FALSE),
small data items. */
HOWTO (R_PPC_EMB_SDA2REL,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC_EMB_SDA2REL",
FALSE,
0,
0xffff,
FALSE),
signed offset from the appropriate base, and filling in the register
field with the appropriate register (0, 2, or 13). */
HOWTO (R_PPC_EMB_SDA21,
0,
2,
16,
FALSE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC_EMB_SDA21",
FALSE,
0,
0xffff,
FALSE),
in the 16 bit signed offset from the appropriate base, and filling in the
register field with the appropriate register (0, 2, or 13). */
HOWTO (R_PPC_EMB_RELSDA,
0,
1,
16,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC_EMB_RELSDA",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_PPC_REL16,
0,
1,
16,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_PPC_REL16",
FALSE,
0,
0xffff,
TRUE),
HOWTO (R_PPC_REL16_LO,
0,
1,
16,
TRUE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC_REL16_LO",
FALSE,
0,
0xffff,
TRUE),
HOWTO (R_PPC_REL16_HI,
16,
1,
16,
TRUE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_PPC_REL16_HI",
FALSE,
0,
0xffff,
TRUE),
the low 16 bits, treated as a signed number, is negative. */
HOWTO (R_PPC_REL16_HA,
16,
1,
16,
TRUE,
0,
complain_overflow_dont,
ppc_elf_addr16_ha_reloc,
"R_PPC_REL16_HA",
FALSE,
0,
0xffff,
TRUE),
HOWTO (R_PPC_GNU_VTINHERIT,
0,
0,
0,
FALSE,
0,
complain_overflow_dont,
NULL,
"R_PPC_GNU_VTINHERIT",
FALSE,
0,
0,
FALSE),
HOWTO (R_PPC_GNU_VTENTRY,
0,
0,
0,
FALSE,
0,
complain_overflow_dont,
NULL,
"R_PPC_GNU_VTENTRY",
FALSE,
0,
0,
FALSE),
HOWTO (R_PPC_TOC16,
0,
1,
16,
FALSE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_PPC_TOC16",
FALSE,
0,
0xffff,
FALSE),
};
static void
ppc_elf_howto_init (void)
{
unsigned int i, type;
for (i = 0;
i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
i++)
{
type = ppc_elf_howto_raw[i].type;
if (type >= (sizeof (ppc_elf_howto_table)
/ sizeof (ppc_elf_howto_table[0])))
abort ();
ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
}
}
static reloc_howto_type *
ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
enum elf_ppc_reloc_type r;
if (!ppc_elf_howto_table[R_PPC_ADDR32])
ppc_elf_howto_init ();
switch (code)
{
default:
return NULL;
case BFD_RELOC_NONE: r = R_PPC_NONE; break;
case BFD_RELOC_32: r = R_PPC_ADDR32; break;
case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
case BFD_RELOC_16: r = R_PPC_ADDR16; break;
case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
}
return ppc_elf_howto_table[r];
};
static void
ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
if (!ppc_elf_howto_table[R_PPC_ADDR32])
ppc_elf_howto_init ();
BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
}
static bfd_reloc_status_type
ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
arelent *reloc_entry,
asymbol *symbol,
void *data ATTRIBUTE_UNUSED,
asection *input_section,
bfd *output_bfd,
char **error_message ATTRIBUTE_UNUSED)
{
bfd_vma relocation;
if (output_bfd != NULL)
{
reloc_entry->address += input_section->output_offset;
return bfd_reloc_ok;
}
if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
return bfd_reloc_outofrange;
if (bfd_is_com_section (symbol->section))
relocation = 0;
else
relocation = symbol->value;
relocation += symbol->section->output_section->vma;
relocation += symbol->section->output_offset;
relocation += reloc_entry->addend;
if (reloc_entry->howto->pc_relative)
relocation -= reloc_entry->address;
reloc_entry->addend += (relocation & 0x8000) << 1;
return bfd_reloc_continue;
}
static bfd_reloc_status_type
ppc_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;
}
typedef struct elf_linker_section
{
asection *section;
const char *name;
const char *bss_name;
const char *sym_name;
struct elf_link_hash_entry *sym;
} elf_linker_section_t;
symbol lists, and provides allows us to return different pointers,
based on different addend's. */
typedef struct elf_linker_section_pointers
{
struct elf_linker_section_pointers *next;
bfd_vma offset;
bfd_vma addend;
elf_linker_section_t *lsect;
} elf_linker_section_pointers_t;
struct ppc_elf_obj_tdata
{
struct elf_obj_tdata elf;
sections added. This is index by the symbol index. */
elf_linker_section_pointers_t **linker_section_pointers;
};
#define ppc_elf_tdata(bfd) \
((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
#define elf_local_ptr_offsets(bfd) \
(ppc_elf_tdata (bfd)->linker_section_pointers)
static bfd_boolean
ppc_elf_mkobject (bfd *abfd)
{
bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
abfd->tdata.any = bfd_zalloc (abfd, amt);
if (abfd->tdata.any == NULL)
return FALSE;
return TRUE;
}
default is 64 bit. */
static bfd_boolean
ppc_elf_object_p (bfd *abfd)
{
if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
{
Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
{
abfd->arch_info = abfd->arch_info->next;
BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
}
}
return TRUE;
}
static bfd_boolean
ppc_elf_set_private_flags (bfd *abfd, flagword flags)
{
BFD_ASSERT (!elf_flags_init (abfd)
|| elf_elfheader (abfd)->e_flags == flags);
elf_elfheader (abfd)->e_flags = flags;
elf_flags_init (abfd) = TRUE;
return TRUE;
}
static bfd_boolean
ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
{
int offset;
unsigned int size;
switch (note->descsz)
{
default:
return FALSE;
case 268:
elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
offset = 72;
size = 192;
break;
}
return _bfd_elfcore_make_pseudosection (abfd, ".reg",
size, note->descpos + offset);
}
static bfd_boolean
ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
{
switch (note->descsz)
{
default:
return FALSE;
case 128:
elf_tdata (abfd)->core_program
= _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
elf_tdata (abfd)->core_command
= _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
}
onto the end of the args in some (at least one anyway)
implementations, so strip it off if it exists. */
{
char *command = elf_tdata (abfd)->core_command;
int n = strlen (command);
if (0 < n && command[n - 1] == ' ')
command[n - 1] = '\0';
}
return TRUE;
}
or (bfd_vma) -1 if it should not be included. */
static bfd_vma
ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
const asection *plt ATTRIBUTE_UNUSED,
const arelent *rel)
{
return rel->address;
}
is called when bfd_section_from_shdr finds a section with an unknown
type. */
static bfd_boolean
ppc_elf_section_from_shdr (bfd *abfd,
Elf_Internal_Shdr *hdr,
const char *name,
int shindex)
{
asection *newsect;
flagword flags;
if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
return FALSE;
newsect = hdr->bfd_section;
flags = bfd_get_section_flags (abfd, newsect);
if (hdr->sh_flags & SHF_EXCLUDE)
flags |= SEC_EXCLUDE;
if (hdr->sh_type == SHT_ORDERED)
flags |= SEC_SORT_ENTRIES;
bfd_set_section_flags (abfd, newsect, flags);
return TRUE;
}
static bfd_boolean
ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
Elf_Internal_Shdr *shdr,
asection *asect)
{
if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
shdr->sh_flags |= SHF_EXCLUDE;
if ((asect->flags & SEC_SORT_ENTRIES) != 0)
shdr->sh_type = SHT_ORDERED;
return TRUE;
}
need to bump up the number of section headers. */
static int
ppc_elf_additional_program_headers (bfd *abfd)
{
asection *s;
int ret = 0;
s = bfd_get_section_by_name (abfd, ".sbss2");
if (s != NULL && (s->flags & SEC_ALLOC) != 0)
++ret;
s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
if (s != NULL && (s->flags & SEC_ALLOC) != 0)
++ret;
return ret;
}
.PPC.EMB.sbss0 a normal section, and not a bss section so
that the linker doesn't crater when trying to make more than
2 sections. */
static const struct bfd_elf_special_section ppc_elf_special_sections[] =
{
{ ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
{ ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
{ ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
{ ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
{ ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
{ ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
{ ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
{ ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
{ ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
{ NULL, 0, 0, 0, 0 }
};
static struct bfd_elf_special_section ppc_alt_plt =
{ ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC };
static const struct bfd_elf_special_section *
ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
{
const struct bfd_elf_special_section *ssect;
if (sec->name == NULL)
return NULL;
ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
sec->use_rela_p);
if (ssect != NULL)
{
if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
ssect = &ppc_alt_plt;
return ssect;
}
return _bfd_elf_get_sec_type_attr (abfd, sec);
}
typedef struct apuinfo_list
{
struct apuinfo_list *next;
unsigned long value;
}
apuinfo_list;
static apuinfo_list *head;
static void
apuinfo_list_init (void)
{
head = NULL;
}
static void
apuinfo_list_add (unsigned long value)
{
apuinfo_list *entry = head;
while (entry != NULL)
{
if (entry->value == value)
return;
entry = entry->next;
}
entry = bfd_malloc (sizeof (* entry));
if (entry == NULL)
return;
entry->value = value;
entry->next = head;
head = entry;
}
static unsigned
apuinfo_list_length (void)
{
apuinfo_list *entry;
unsigned long count;
for (entry = head, count = 0;
entry;
entry = entry->next)
++ count;
return count;
}
static inline unsigned long
apuinfo_list_element (unsigned long number)
{
apuinfo_list * entry;
for (entry = head;
entry && number --;
entry = entry->next)
;
return entry ? entry->value : 0;
}
static void
apuinfo_list_finish (void)
{
apuinfo_list *entry;
for (entry = head; entry;)
{
apuinfo_list *next = entry->next;
free (entry);
entry = next;
}
head = NULL;
}
#define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
#define APUINFO_LABEL "APUinfo"
the APUinfo values that will need to be emitted. */
static void
ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
{
bfd *ibfd;
asection *asec;
char *buffer;
unsigned num_input_sections;
bfd_size_type output_section_size;
unsigned i;
unsigned num_entries;
unsigned long offset;
unsigned long length;
const char *error_message = NULL;
if (link_info == NULL)
return;
num_input_sections = 0;
output_section_size = 0;
for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
{
asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
if (asec)
{
++ num_input_sections;
output_section_size += asec->size;
}
}
in order to make merging worthwhile. */
if (num_input_sections < 1)
return;
asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
if (asec == NULL)
return;
buffer = bfd_malloc (output_section_size);
if (buffer == NULL)
return;
offset = 0;
apuinfo_list_init ();
for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
{
unsigned long datum;
char *ptr;
asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
if (asec == NULL)
continue;
length = asec->size;
if (length < 24)
{
error_message = _("corrupt or empty %s section in %B");
goto fail;
}
if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
|| (bfd_bread (buffer + offset, length, ibfd) != length))
{
error_message = _("unable to read in %s section from %B");
goto fail;
}
ptr = buffer + offset;
error_message = _("corrupt %s section in %B");
extract the values this way in order to allow for a
host whose endian-ness is different from the target. */
datum = bfd_get_32 (ibfd, ptr);
if (datum != sizeof APUINFO_LABEL)
goto fail;
datum = bfd_get_32 (ibfd, ptr + 8);
if (datum != 0x2)
goto fail;
if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
goto fail;
datum = bfd_get_32 (ibfd, ptr + 4);
if (datum + 20 != length)
goto fail;
if (offset + length > output_section_size)
goto fail;
for (i = 0; i < datum; i += 4)
apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
offset += length;
}
error_message = NULL;
num_entries = apuinfo_list_length ();
output_section_size = 20 + num_entries * 4;
asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
if (! bfd_set_section_size (abfd, asec, output_section_size))
ibfd = abfd,
error_message = _("warning: unable to set size of %s section in %B");
fail:
free (buffer);
if (error_message)
(*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
}
contents. We have already stored this in our linked list structure. */
static bfd_boolean
ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
asection *asec,
bfd_byte *contents ATTRIBUTE_UNUSED)
{
return (apuinfo_list_length ()
&& strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
}
static void
ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
{
bfd_byte *buffer;
asection *asec;
unsigned i;
unsigned num_entries;
bfd_size_type length;
asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
if (asec == NULL)
return;
if (apuinfo_list_length () == 0)
return;
length = asec->size;
if (length < 20)
return;
buffer = bfd_malloc (length);
if (buffer == NULL)
{
(*_bfd_error_handler)
(_("failed to allocate space for new APUinfo section."));
return;
}
num_entries = apuinfo_list_length ();
bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
bfd_put_32 (abfd, num_entries * 4, buffer + 4);
bfd_put_32 (abfd, 0x2, buffer + 8);
strcpy ((char *) buffer + 12, APUINFO_LABEL);
length = 20;
for (i = 0; i < num_entries; i++)
{
bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
length += 4;
}
if (length != asec->size)
(*_bfd_error_handler) (_("failed to compute new APUinfo section."));
if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
(*_bfd_error_handler) (_("failed to install new APUinfo section."));
free (buffer);
apuinfo_list_finish ();
}
functions above are used generally. They appear in this file more
or less in the order in which they are called. eg.
ppc_elf_check_relocs is called early in the link process,
ppc_elf_finish_dynamic_sections is one of the last functions
called. */
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_elf_dyn_relocs
{
struct ppc_elf_dyn_relocs *next;
asection *sec;
bfd_size_type count;
bfd_size_type pc_count;
};
than one glink entry per symbol. */
struct plt_entry
{
struct plt_entry *next;
This field stores the offset into .got2 used to initialise the
GOT pointer reg. It will always be at least 32768 (and for
current gcc this is the only offset used). */
bfd_vma addend;
asection *sec;
union
{
bfd_signed_vma refcount;
bfd_vma offset;
} plt;
bfd_vma glink_offset;
};
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_PPC_REL24 \
&& (RTYPE) != R_PPC_REL14 \
&& (RTYPE) != R_PPC_REL14_BRTAKEN \
&& (RTYPE) != R_PPC_REL14_BRNTAKEN \
&& (RTYPE) != R_PPC_REL32)
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. */
#define ELIMINATE_COPY_RELOCS 1
struct ppc_elf_link_hash_entry
{
struct elf_link_hash_entry elf;
specific backend uses this field to map the field into the offset
from the beginning of the section. */
elf_linker_section_pointers_t *linker_section_pointer;
struct ppc_elf_dyn_relocs *dyn_relocs;
TLS_GD .. TLS_TLS 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. */
#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_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
char tls_mask;
symbol. */
unsigned char has_sda_refs;
};
#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
enum ppc_elf_plt_type {
PLT_UNSET,
PLT_OLD,
PLT_NEW,
PLT_VXWORKS
};
struct ppc_elf_link_hash_table
{
struct elf_link_hash_table elf;
asection *got;
asection *relgot;
asection *glink;
asection *plt;
asection *relplt;
asection *dynbss;
asection *relbss;
asection *dynsbss;
asection *relsbss;
elf_linker_section_t sdata[2];
asection *sbss;
struct elf_link_hash_entry *tls_get_addr;
union {
bfd_signed_vma refcount;
bfd_vma offset;
} tlsld_got;
bfd_vma glink_pltresolve;
unsigned int got_header_size;
unsigned int got_gap;
enum ppc_elf_plt_type plt_type;
unsigned int can_use_new_plt:1;
unsigned int emit_stub_syms:1;
struct sym_sec_cache sym_sec;
asection *srelplt2;
asection *sgotplt;
int is_vxworks;
int plt_entry_size;
int plt_slot_size;
int plt_initial_entry_size;
};
#define ppc_elf_hash_table(p) \
((struct ppc_elf_link_hash_table *) (p)->hash)
static struct bfd_hash_entry *
ppc_elf_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_elf_link_hash_entry));
if (entry == NULL)
return entry;
}
entry = _bfd_elf_link_hash_newfunc (entry, table, string);
if (entry != NULL)
{
ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
ppc_elf_hash_entry (entry)->tls_mask = 0;
}
return entry;
}
static struct bfd_link_hash_table *
ppc_elf_link_hash_table_create (bfd *abfd)
{
struct ppc_elf_link_hash_table *ret;
ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
if (ret == NULL)
return NULL;
if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
ppc_elf_link_hash_newfunc,
sizeof (struct ppc_elf_link_hash_entry)))
{
free (ret);
return NULL;
}
ret->elf.init_plt_refcount.refcount = 0;
ret->elf.init_plt_refcount.glist = NULL;
ret->elf.init_plt_offset.offset = 0;
ret->elf.init_plt_offset.glist = NULL;
ret->sdata[0].name = ".sdata";
ret->sdata[0].sym_name = "_SDA_BASE_";
ret->sdata[0].bss_name = ".sbss";
ret->sdata[1].name = ".sdata2";
ret->sdata[1].sym_name = "_SDA2_BASE_";
ret->sdata[1].bss_name = ".sbss2";
ret->plt_entry_size = 12;
ret->plt_slot_size = 8;
ret->plt_initial_entry_size = 72;
ret->is_vxworks = 0;
return &ret->elf.root;
}
static bfd_boolean
ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
{
struct ppc_elf_link_hash_table *htab;
asection *s;
flagword flags;
if (!_bfd_elf_create_got_section (abfd, info))
return FALSE;
htab = ppc_elf_hash_table (info);
htab->got = s = bfd_get_section_by_name (abfd, ".got");
if (s == NULL)
abort ();
if (htab->is_vxworks)
{
htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
if (!htab->sgotplt)
abort ();
}
else
{
executable. */
flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
if (!bfd_set_section_flags (abfd, s, flags))
return FALSE;
}
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
| SEC_LINKER_CREATED | SEC_READONLY);
htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
if (!htab->relgot
|| ! bfd_set_section_alignment (abfd, htab->relgot, 2))
return FALSE;
return TRUE;
}
to output sections (just like _bfd_elf_create_dynamic_sections has
to create .dynbss and .rela.bss). */
static bfd_boolean
ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
{
struct ppc_elf_link_hash_table *htab;
asection *s;
flagword flags;
htab = ppc_elf_hash_table (info);
if (htab->got == NULL
&& !ppc_elf_create_got (abfd, info))
return FALSE;
if (!_bfd_elf_create_dynamic_sections (abfd, info))
return FALSE;
flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
htab->glink = s;
if (s == NULL
|| !bfd_set_section_alignment (abfd, s, 4))
return FALSE;
htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
s = bfd_make_section_with_flags (abfd, ".dynsbss",
SEC_ALLOC | SEC_LINKER_CREATED);
htab->dynsbss = s;
if (s == NULL)
return FALSE;
if (! info->shared)
{
htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
htab->relsbss = s;
if (s == NULL
|| ! bfd_set_section_alignment (abfd, s, 2))
return FALSE;
}
if (htab->is_vxworks
&& !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
return FALSE;
htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
if (s == NULL)
abort ();
flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
if (htab->plt_type == PLT_VXWORKS)
flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
return bfd_set_section_flags (abfd, s, flags);
}
static void
ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
struct elf_link_hash_entry *dir,
struct elf_link_hash_entry *ind)
{
struct ppc_elf_link_hash_entry *edir, *eind;
edir = (struct ppc_elf_link_hash_entry *) dir;
eind = (struct ppc_elf_link_hash_entry *) ind;
if (eind->dyn_relocs != NULL)
{
if (edir->dyn_relocs != NULL)
{
struct ppc_elf_dyn_relocs **pp;
struct ppc_elf_dyn_relocs *p;
list. Merge any entries against the same section. */
for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
{
struct ppc_elf_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->tls_mask |= eind->tls_mask;
edir->has_sda_refs |= eind->has_sda_refs;
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;
the symbol which just became indirect. */
edir->elf.got.refcount += eind->elf.got.refcount;
eind->elf.got.refcount = 0;
if (eind->elf.plt.plist != NULL)
{
if (edir->elf.plt.plist != NULL)
{
struct plt_entry **entp;
struct plt_entry *ent;
for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
{
struct plt_entry *dent;
for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
if (dent->sec == ent->sec && dent->addend == ent->addend)
{
dent->plt.refcount += ent->plt.refcount;
*entp = ent->next;
break;
}
if (dent == NULL)
entp = &ent->next;
}
*entp = edir->elf.plt.plist;
}
edir->elf.plt.plist = eind->elf.plt.plist;
eind->elf.plt.plist = NULL;
}
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;
}
}
static bfd_boolean
is_ppc_elf_target (const struct bfd_target *targ)
{
extern const bfd_target bfd_elf32_powerpc_vec;
extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
extern const bfd_target bfd_elf32_powerpcle_vec;
return (targ == &bfd_elf32_powerpc_vec
|| targ == &bfd_elf32_powerpc_vxworks_vec
|| targ == &bfd_elf32_powerpcle_vec);
}
file. We use it to put .comm items in .sbss, and not .bss. */
static bfd_boolean
ppc_elf_add_symbol_hook (bfd *abfd,
struct bfd_link_info *info,
Elf_Internal_Sym *sym,
const char **namep ATTRIBUTE_UNUSED,
flagword *flagsp ATTRIBUTE_UNUSED,
asection **secp,
bfd_vma *valp)
{
if (sym->st_shndx == SHN_COMMON
&& !info->relocatable
&& sym->st_size <= elf_gp_size (abfd)
&& is_ppc_elf_target (info->hash->creator))
{
put into .sbss. */
struct ppc_elf_link_hash_table *htab;
htab = ppc_elf_hash_table (info);
if (htab->sbss == NULL)
{
flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
if (!htab->elf.dynobj)
htab->elf.dynobj = abfd;
htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
".sbss",
flags);
if (htab->sbss == NULL)
return FALSE;
}
*secp = htab->sbss;
*valp = sym->st_size;
}
return TRUE;
}
static bfd_boolean
create_sdata_sym (struct ppc_elf_link_hash_table *htab,
elf_linker_section_t *lsect)
{
lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
TRUE, FALSE, TRUE);
if (lsect->sym == NULL)
return FALSE;
if (lsect->sym->root.type == bfd_link_hash_new)
lsect->sym->non_elf = 0;
lsect->sym->ref_regular = 1;
return TRUE;
}
static bfd_boolean
ppc_elf_create_linker_section (bfd *abfd,
struct bfd_link_info *info,
flagword flags,
elf_linker_section_t *lsect)
{
struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
asection *s;
flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
| SEC_LINKER_CREATED);
if (!htab->elf.dynobj)
htab->elf.dynobj = abfd;
s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
lsect->name,
flags);
if (s == NULL
|| !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
return FALSE;
lsect->section = s;
return create_sdata_sym (htab, lsect);
}
static elf_linker_section_pointers_t *
elf_find_pointer_linker_section
(elf_linker_section_pointers_t *linker_pointers,
bfd_vma addend,
elf_linker_section_t *lsect)
{
for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
return linker_pointers;
return NULL;
}
static bfd_boolean
elf_create_pointer_linker_section (bfd *abfd,
elf_linker_section_t *lsect,
struct elf_link_hash_entry *h,
const Elf_Internal_Rela *rel)
{
elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
elf_linker_section_pointers_t *linker_section_ptr;
unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
bfd_size_type amt;
BFD_ASSERT (lsect != NULL);
if (h != NULL)
{
struct ppc_elf_link_hash_entry *eh;
eh = (struct ppc_elf_link_hash_entry *) h;
if (elf_find_pointer_linker_section (eh->linker_section_pointer,
rel->r_addend,
lsect))
return TRUE;
ptr_linker_section_ptr = &eh->linker_section_pointer;
}
else
{
elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
if (!ptr)
{
unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
amt = num_symbols;
amt *= sizeof (elf_linker_section_pointers_t *);
ptr = bfd_zalloc (abfd, amt);
if (!ptr)
return FALSE;
elf_local_ptr_offsets (abfd) = ptr;
}
if (elf_find_pointer_linker_section (ptr[r_symndx],
rel->r_addend,
lsect))
return TRUE;
ptr_linker_section_ptr = &ptr[r_symndx];
}
a new pointer record from internal memory. */
BFD_ASSERT (ptr_linker_section_ptr != NULL);
amt = sizeof (elf_linker_section_pointers_t);
linker_section_ptr = bfd_alloc (abfd, amt);
if (!linker_section_ptr)
return FALSE;
linker_section_ptr->next = *ptr_linker_section_ptr;
linker_section_ptr->addend = rel->r_addend;
linker_section_ptr->lsect = lsect;
*ptr_linker_section_ptr = linker_section_ptr;
linker_section_ptr->offset = lsect->section->size;
lsect->section->size += 4;
#ifdef DEBUG
fprintf (stderr,
"Create pointer in linker section %s, offset = %ld, section size = %ld\n",
lsect->name, (long) linker_section_ptr->offset,
(long) lsect->section->size);
#endif
return TRUE;
}
static bfd_boolean
update_local_sym_info (bfd *abfd,
Elf_Internal_Shdr *symtab_hdr,
unsigned long r_symndx,
int tls_type)
{
bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
char *local_got_tls_masks;
if (local_got_refcounts == NULL)
{
bfd_size_type size = symtab_hdr->sh_info;
size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
local_got_refcounts = bfd_zalloc (abfd, size);
if (local_got_refcounts == NULL)
return FALSE;
elf_local_got_refcounts (abfd) = local_got_refcounts;
}
local_got_refcounts[r_symndx] += 1;
local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
local_got_tls_masks[r_symndx] |= tls_type;
return TRUE;
}
static bfd_boolean
update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
asection *sec, bfd_vma addend)
{
struct plt_entry *ent;
if (addend < 32768)
sec = NULL;
for (ent = h->plt.plist; ent != NULL; ent = ent->next)
if (ent->sec == sec && 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 = h->plt.plist;
ent->sec = sec;
ent->addend = addend;
ent->plt.refcount = 0;
h->plt.plist = ent;
}
ent->plt.refcount += 1;
return TRUE;
}
static struct plt_entry *
find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
{
struct plt_entry *ent;
if (addend < 32768)
sec = NULL;
for (ent = h->plt.plist; ent != NULL; ent = ent->next)
if (ent->sec == sec && ent->addend == addend)
break;
return ent;
}
static void
bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
{
(*_bfd_error_handler)
(_("%B: relocation %s cannot be used when making a shared object"),
abfd,
ppc_elf_howto_table[r_type]->name);
bfd_set_error (bfd_error_bad_value);
}
allocate space in the global offset table or procedure linkage
table. */
static bfd_boolean
ppc_elf_check_relocs (bfd *abfd,
struct bfd_link_info *info,
asection *sec,
const Elf_Internal_Rela *relocs)
{
struct ppc_elf_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
asection *got2, *sreloc;
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;
#ifdef DEBUG
_bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
sec, abfd);
#endif
if (!ppc_elf_howto_table[R_PPC_ADDR32])
ppc_elf_howto_init ();
htab = ppc_elf_hash_table (info);
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
got2 = bfd_get_section_by_name (abfd, ".got2");
sreloc = NULL;
rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
{
unsigned long r_symndx;
enum elf_ppc_reloc_type r_type;
struct elf_link_hash_entry *h;
int tls_type = 0;
r_symndx = ELF32_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;
}
This shows up in particular in an R_PPC_ADDR32 in the eabi
startup code. */
if (h != NULL
&& htab->got == NULL
&& strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
{
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
if (!ppc_elf_create_got (htab->elf.dynobj, info))
return FALSE;
BFD_ASSERT (h == htab->elf.hgot);
}
r_type = ELF32_R_TYPE (rel->r_info);
switch (r_type)
{
case R_PPC_GOT_TLSLD16:
case R_PPC_GOT_TLSLD16_LO:
case R_PPC_GOT_TLSLD16_HI:
case R_PPC_GOT_TLSLD16_HA:
htab->tlsld_got.refcount += 1;
tls_type = TLS_TLS | TLS_LD;
goto dogottls;
case R_PPC_GOT_TLSGD16:
case R_PPC_GOT_TLSGD16_LO:
case R_PPC_GOT_TLSGD16_HI:
case R_PPC_GOT_TLSGD16_HA:
tls_type = TLS_TLS | TLS_GD;
goto dogottls;
case R_PPC_GOT_TPREL16:
case R_PPC_GOT_TPREL16_LO:
case R_PPC_GOT_TPREL16_HI:
case R_PPC_GOT_TPREL16_HA:
if (info->shared)
info->flags |= DF_STATIC_TLS;
tls_type = TLS_TLS | TLS_TPREL;
goto dogottls;
case R_PPC_GOT_DTPREL16:
case R_PPC_GOT_DTPREL16_LO:
case R_PPC_GOT_DTPREL16_HI:
case R_PPC_GOT_DTPREL16_HA:
tls_type = TLS_TLS | TLS_DTPREL;
dogottls:
sec->has_tls_reloc = 1;
case R_PPC_GOT16:
case R_PPC_GOT16_LO:
case R_PPC_GOT16_HI:
case R_PPC_GOT16_HA:
if (htab->got == NULL)
{
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
if (!ppc_elf_create_got (htab->elf.dynobj, info))
return FALSE;
}
if (h != NULL)
{
h->got.refcount += 1;
ppc_elf_hash_entry (h)->tls_mask |= tls_type;
}
else
if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
return FALSE;
break;
case R_PPC_EMB_SDAI16:
if (info->shared)
{
bad_shared_reloc (abfd, r_type);
return FALSE;
}
if (htab->sdata[0].section == NULL
&& !ppc_elf_create_linker_section (abfd, info, 0,
&htab->sdata[0]))
return FALSE;
if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
h, rel))
return FALSE;
if (h != NULL)
{
ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
h->non_got_ref = TRUE;
}
break;
case R_PPC_EMB_SDA2I16:
if (info->shared)
{
bad_shared_reloc (abfd, r_type);
return FALSE;
}
if (htab->sdata[1].section == NULL
&& !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
&htab->sdata[1]))
return FALSE;
if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
h, rel))
return FALSE;
if (h != NULL)
{
ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
h->non_got_ref = TRUE;
}
break;
case R_PPC_SDAREL16:
if (info->shared)
{
bad_shared_reloc (abfd, r_type);
return FALSE;
}
if (htab->sdata[0].sym == NULL
&& !create_sdata_sym (htab, &htab->sdata[0]))
return FALSE;
if (h != NULL)
{
ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
h->non_got_ref = TRUE;
}
break;
case R_PPC_EMB_SDA2REL:
if (info->shared)
{
bad_shared_reloc (abfd, r_type);
return FALSE;
}
if (htab->sdata[1].sym == NULL
&& !create_sdata_sym (htab, &htab->sdata[1]))
return FALSE;
if (h != NULL)
{
ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
h->non_got_ref = TRUE;
}
break;
case R_PPC_EMB_SDA21:
case R_PPC_EMB_RELSDA:
if (info->shared)
{
bad_shared_reloc (abfd, r_type);
return FALSE;
}
if (htab->sdata[0].sym == NULL
&& !create_sdata_sym (htab, &htab->sdata[0]))
return FALSE;
if (htab->sdata[1].sym == NULL
&& !create_sdata_sym (htab, &htab->sdata[1]))
return FALSE;
if (h != NULL)
{
ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
h->non_got_ref = TRUE;
}
break;
case R_PPC_EMB_NADDR32:
case R_PPC_EMB_NADDR16:
case R_PPC_EMB_NADDR16_LO:
case R_PPC_EMB_NADDR16_HI:
case R_PPC_EMB_NADDR16_HA:
if (info->shared)
{
bad_shared_reloc (abfd, r_type);
return FALSE;
}
if (h != NULL)
h->non_got_ref = TRUE;
break;
case R_PPC_PLT32:
case R_PPC_PLTREL24:
case R_PPC_PLTREL32:
case R_PPC_PLT16_LO:
case R_PPC_PLT16_HI:
case R_PPC_PLT16_HA:
#ifdef DEBUG
fprintf (stderr, "Reloc requires a PLT entry\n");
#endif
actually build the entry in finish_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_error_handler) (_("%B(%A+0x%lx): %s reloc against "
"local symbol"),
abfd,
sec,
(long) rel->r_offset,
ppc_elf_howto_table[r_type]->name);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
else
{
bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
h->needs_plt = 1;
if (!update_plt_info (abfd, h, got2, addend))
return FALSE;
}
break;
relocation if linking a shared object since they are
section relative. */
case R_PPC_SECTOFF:
case R_PPC_SECTOFF_LO:
case R_PPC_SECTOFF_HI:
case R_PPC_SECTOFF_HA:
case R_PPC_DTPREL16:
case R_PPC_DTPREL16_LO:
case R_PPC_DTPREL16_HI:
case R_PPC_DTPREL16_HA:
case R_PPC_TOC16:
break;
case R_PPC_REL16:
case R_PPC_REL16_LO:
case R_PPC_REL16_HI:
case R_PPC_REL16_HA:
htab->can_use_new_plt = 1;
break;
case R_PPC_TLS:
case R_PPC_EMB_MRKREF:
case R_PPC_NONE:
case R_PPC_max:
break;
case R_PPC_COPY:
case R_PPC_GLOB_DAT:
case R_PPC_JMP_SLOT:
case R_PPC_RELATIVE:
break;
case R_PPC_ADDR30:
case R_PPC_EMB_RELSEC16:
case R_PPC_EMB_RELST_LO:
case R_PPC_EMB_RELST_HI:
case R_PPC_EMB_RELST_HA:
case R_PPC_EMB_BIT_FLD:
break;
case R_PPC_LOCAL24PC:
if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
htab->plt_type = PLT_OLD;
break;
Reconstruct it for later use during GC. */
case R_PPC_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_PPC_GNU_VTENTRY:
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
return FALSE;
break;
case R_PPC_TPREL32:
if (info->shared)
info->flags |= DF_STATIC_TLS;
goto dodyn;
case R_PPC_DTPMOD32:
case R_PPC_DTPREL32:
goto dodyn;
case R_PPC_TPREL16:
case R_PPC_TPREL16_LO:
case R_PPC_TPREL16_HI:
case R_PPC_TPREL16_HA:
if (info->shared)
info->flags |= DF_STATIC_TLS;
goto dodyn;
case R_PPC_REL32:
if (h == NULL
&& got2 != NULL
&& (sec->flags & SEC_CODE) != 0
&& (info->shared || info->pie)
&& htab->plt_type == PLT_UNSET)
{
the start of a function, which assembles to a REL32
reference to .got2. If we detect one of these, then
force the old PLT layout because the linker cannot
reliably deduce the GOT pointer value needed for
PLT call stubs. */
asection *s;
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
r_symndx);
if (s == got2)
htab->plt_type = PLT_OLD;
}
if (h == NULL || h == htab->elf.hgot)
break;
goto dodyn1;
case R_PPC_REL24:
case R_PPC_REL14:
case R_PPC_REL14_BRTAKEN:
case R_PPC_REL14_BRNTAKEN:
if (h == NULL)
break;
if (h == htab->elf.hgot)
{
if (htab->plt_type == PLT_UNSET)
htab->plt_type = PLT_OLD;
break;
}
case R_PPC_ADDR32:
case R_PPC_ADDR24:
case R_PPC_ADDR16:
case R_PPC_ADDR16_LO:
case R_PPC_ADDR16_HI:
case R_PPC_ADDR16_HA:
case R_PPC_ADDR14:
case R_PPC_ADDR14_BRTAKEN:
case R_PPC_ADDR14_BRNTAKEN:
case R_PPC_UADDR32:
case R_PPC_UADDR16:
dodyn1:
if (h != NULL && !info->shared)
{
a function defined in a dynamic object. */
if (!update_plt_info (abfd, h, NULL, 0))
return FALSE;
h->non_got_ref = 1;
}
dodyn:
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. */
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_elf_dyn_relocs *p;
struct ppc_elf_dyn_relocs **head;
#ifdef DEBUG
fprintf (stderr,
"ppc_elf_check_relocs needs to "
"create relocation for %s\n",
(h && h->root.root.string
? h->root.root.string : "<unknown>"));
#endif
if (sreloc == NULL)
{
const char *name;
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;
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
&& strcmp (bfd_get_section_name (abfd, sec),
name + 5) == 0);
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
sreloc = bfd_get_section_by_name (htab->elf.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 (htab->elf.dynobj,
name,
flags);
if (sreloc == NULL
|| ! bfd_set_section_alignment (htab->elf.dynobj,
sreloc, 2))
return FALSE;
}
elf_section_data (sec)->sreloc = sreloc;
}
relocations we need for this symbol. */
if (h != NULL)
{
head = &ppc_elf_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_elf_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;
}
}
return TRUE;
}
object file when linking. */
static bfd_boolean
ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
{
flagword old_flags;
flagword new_flags;
bfd_boolean error;
if (!is_ppc_elf_target (ibfd->xvec)
|| !is_ppc_elf_target (obfd->xvec))
return TRUE;
if (! _bfd_generic_verify_endian_match (ibfd, obfd))
return FALSE;
new_flags = elf_elfheader (ibfd)->e_flags;
old_flags = elf_elfheader (obfd)->e_flags;
if (!elf_flags_init (obfd))
{
elf_flags_init (obfd) = TRUE;
elf_elfheader (obfd)->e_flags = new_flags;
}
else if (new_flags == old_flags)
;
else
{
to be linked with either. */
error = FALSE;
if ((new_flags & EF_PPC_RELOCATABLE) != 0
&& (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
{
error = TRUE;
(*_bfd_error_handler)
(_("%B: compiled with -mrelocatable and linked with "
"modules compiled normally"), ibfd);
}
else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
&& (old_flags & EF_PPC_RELOCATABLE) != 0)
{
error = TRUE;
(*_bfd_error_handler)
(_("%B: compiled normally and linked with "
"modules compiled with -mrelocatable"), ibfd);
}
if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
but each input file is either -mrelocatable or -mrelocatable-lib. */
if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
&& (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
&& (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
any module uses it. */
elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
if (new_flags != old_flags)
{
error = TRUE;
(*_bfd_error_handler)
(_("%B: uses different e_flags (0x%lx) fields "
"than previous modules (0x%lx)"),
ibfd, (long) new_flags, (long) old_flags);
}
if (error)
{
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
}
return TRUE;
}
Returns -1 on error, 0 for old PLT, 1 for new PLT. */
int
ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info,
int force_old_plt,
int emit_stub_syms)
{
struct ppc_elf_link_hash_table *htab;
flagword flags;
htab = ppc_elf_hash_table (info);
if (htab->plt_type == PLT_UNSET)
htab->plt_type = (force_old_plt || !htab->can_use_new_plt
? PLT_OLD : PLT_NEW);
htab->emit_stub_syms = emit_stub_syms;
BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
if (htab->plt_type == PLT_NEW)
{
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
if (htab->plt != NULL
&& !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
return -1;
if (htab->got != NULL
&& !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
return -1;
}
else
{
if (htab->glink != NULL
&& !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
return -1;
}
return htab->plt_type == PLT_NEW;
}
relocation. */
static asection *
ppc_elf_gc_mark_hook (asection *sec,
struct bfd_link_info *info ATTRIBUTE_UNUSED,
Elf_Internal_Rela *rel,
struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym)
{
if (h != NULL)
{
switch (ELF32_R_TYPE (rel->r_info))
{
case R_PPC_GNU_VTINHERIT:
case R_PPC_GNU_VTENTRY:
break;
default:
switch (h->root.type)
{
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
return h->root.u.def.section;
case bfd_link_hash_common:
return h->root.u.c.p->section;
default:
break;
}
}
}
else
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
return NULL;
}
section being removed. */
static bfd_boolean
ppc_elf_gc_sweep_hook (bfd *abfd,
struct bfd_link_info *info,
asection *sec,
const Elf_Internal_Rela *relocs)
{
struct ppc_elf_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel, *relend;
asection *got2;
if ((sec->flags & SEC_ALLOC) == 0)
return TRUE;
elf_section_data (sec)->local_dynrel = NULL;
htab = ppc_elf_hash_table (info);
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
local_got_refcounts = elf_local_got_refcounts (abfd);
got2 = bfd_get_section_by_name (abfd, ".got2");
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; rel++)
{
unsigned long r_symndx;
enum elf_ppc_reloc_type r_type;
struct elf_link_hash_entry *h = NULL;
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx >= symtab_hdr->sh_info)
{
struct ppc_elf_dyn_relocs **pp, *p;
struct ppc_elf_link_hash_entry *eh;
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_elf_link_hash_entry *) h;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
if (p->sec == sec)
{
*pp = p->next;
break;
}
}
r_type = ELF32_R_TYPE (rel->r_info);
switch (r_type)
{
case R_PPC_GOT_TLSLD16:
case R_PPC_GOT_TLSLD16_LO:
case R_PPC_GOT_TLSLD16_HI:
case R_PPC_GOT_TLSLD16_HA:
htab->tlsld_got.refcount -= 1;
case R_PPC_GOT_TLSGD16:
case R_PPC_GOT_TLSGD16_LO:
case R_PPC_GOT_TLSGD16_HI:
case R_PPC_GOT_TLSGD16_HA:
case R_PPC_GOT_TPREL16:
case R_PPC_GOT_TPREL16_LO:
case R_PPC_GOT_TPREL16_HI:
case R_PPC_GOT_TPREL16_HA:
case R_PPC_GOT_DTPREL16:
case R_PPC_GOT_DTPREL16_LO:
case R_PPC_GOT_DTPREL16_HI:
case R_PPC_GOT_DTPREL16_HA:
case R_PPC_GOT16:
case R_PPC_GOT16_LO:
case R_PPC_GOT16_HI:
case R_PPC_GOT16_HA:
if (h != NULL)
{
if (h->got.refcount > 0)
h->got.refcount--;
}
else if (local_got_refcounts != NULL)
{
if (local_got_refcounts[r_symndx] > 0)
local_got_refcounts[r_symndx]--;
}
break;
case R_PPC_REL24:
case R_PPC_REL14:
case R_PPC_REL14_BRTAKEN:
case R_PPC_REL14_BRNTAKEN:
case R_PPC_REL32:
if (h == NULL || h == htab->elf.hgot)
break;
case R_PPC_ADDR32:
case R_PPC_ADDR24:
case R_PPC_ADDR16:
case R_PPC_ADDR16_LO:
case R_PPC_ADDR16_HI:
case R_PPC_ADDR16_HA:
case R_PPC_ADDR14:
case R_PPC_ADDR14_BRTAKEN:
case R_PPC_ADDR14_BRNTAKEN:
case R_PPC_UADDR32:
case R_PPC_UADDR16:
if (info->shared)
break;
case R_PPC_PLT32:
case R_PPC_PLTREL24:
case R_PPC_PLTREL32:
case R_PPC_PLT16_LO:
case R_PPC_PLT16_HI:
case R_PPC_PLT16_HA:
if (h != NULL)
{
bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
struct plt_entry *ent = find_plt_ent (h, got2, addend);
if (ent->plt.refcount > 0)
ent->plt.refcount -= 1;
}
break;
default:
break;
}
}
return TRUE;
}
asection *
ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
{
struct ppc_elf_link_hash_table *htab;
htab = ppc_elf_hash_table (info);
if (htab->plt_type == PLT_NEW
&& htab->plt != NULL
&& htab->plt->output_section != NULL)
{
elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
}
htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
FALSE, FALSE, TRUE);
return _bfd_elf_tls_setup (obfd, info);
}
opportunities. */
bfd_boolean
ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info)
{
bfd *ibfd;
asection *sec;
struct ppc_elf_link_hash_table *htab;
if (info->relocatable || info->shared)
return TRUE;
htab = ppc_elf_hash_table (info);
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
{
Elf_Internal_Sym *locsyms = NULL;
Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
for (sec = ibfd->sections; sec != NULL; sec = 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;
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_ppc_reloc_type r_type;
unsigned long r_symndx;
struct elf_link_hash_entry *h = NULL;
char *tls_mask;
char tls_set, tls_clear;
bfd_boolean is_local;
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx >= symtab_hdr->sh_info)
{
struct elf_link_hash_entry **sym_hashes;
sym_hashes = elf_sym_hashes (ibfd);
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;
}
is_local = FALSE;
if (h == NULL
|| !h->def_dynamic)
is_local = TRUE;
r_type = ELF32_R_TYPE (rel->r_info);
switch (r_type)
{
case R_PPC_GOT_TLSLD16:
case R_PPC_GOT_TLSLD16_LO:
case R_PPC_GOT_TLSLD16_HI:
case R_PPC_GOT_TLSLD16_HA:
defined in a shared lib. Leave them alone if
that turns out to be the case. */
expecting_tls_get_addr = 0;
htab->tlsld_got.refcount -= 1;
if (!is_local)
continue;
tls_set = 0;
tls_clear = TLS_LD;
expecting_tls_get_addr = 1;
break;
case R_PPC_GOT_TLSGD16:
case R_PPC_GOT_TLSGD16_LO:
case R_PPC_GOT_TLSGD16_HI:
case R_PPC_GOT_TLSGD16_HA:
if (is_local)
tls_set = 0;
else
tls_set = TLS_TLS | TLS_TPRELGD;
tls_clear = TLS_GD;
expecting_tls_get_addr = 1;
break;
case R_PPC_GOT_TPREL16:
case R_PPC_GOT_TPREL16_LO:
case R_PPC_GOT_TPREL16_HI:
case R_PPC_GOT_TPREL16_HA:
expecting_tls_get_addr = 0;
if (is_local)
{
tls_set = 0;
tls_clear = TLS_TPREL;
break;
}
else
continue;
case R_PPC_REL14:
case R_PPC_REL14_BRTAKEN:
case R_PPC_REL14_BRNTAKEN:
case R_PPC_REL24:
if (expecting_tls_get_addr
&& h != NULL
&& h == htab->tls_get_addr)
{
struct plt_entry *ent = find_plt_ent (h, NULL, 0);
if (ent != NULL && ent->plt.refcount > 0)
ent->plt.refcount -= 1;
}
expecting_tls_get_addr = 0;
continue;
default:
expecting_tls_get_addr = 0;
continue;
}
if (h != NULL)
{
if (tls_set == 0)
{
if (h->got.refcount > 0)
h->got.refcount -= 1;
}
tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
}
else
{
Elf_Internal_Sym *sym;
bfd_signed_vma *lgot_refs;
char *lgot_masks;
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)
{
if (elf_section_data (sec)->relocs != relstart)
free (relstart);
return FALSE;
}
}
sym = locsyms + r_symndx;
lgot_refs = elf_local_got_refcounts (ibfd);
if (lgot_refs == NULL)
abort ();
if (tls_set == 0)
{
if (lgot_refs[r_symndx] > 0)
lgot_refs[r_symndx] -= 1;
}
lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
tls_mask = &lgot_masks[r_symndx];
}
*tls_mask |= tls_set;
*tls_mask &= ~tls_clear;
}
if (elf_section_data (sec)->relocs != relstart)
free (relstart);
}
if (locsyms != NULL
&& (symtab_hdr->contents != (unsigned char *) locsyms))
{
if (!info->keep_memory)
free (locsyms);
else
symtab_hdr->contents = (unsigned char *) locsyms;
}
}
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
ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
struct elf_link_hash_entry *h)
{
struct ppc_elf_link_hash_table *htab;
asection *s;
unsigned int power_of_two;
#ifdef DEBUG
fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
h->root.root.string);
#endif
htab = ppc_elf_hash_table (info);
BFD_ASSERT (htab->elf.dynobj != NULL
&& (h->needs_plt
|| h->u.weakdef != NULL
|| (h->def_dynamic
&& h->ref_regular
&& !h->def_regular)));
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))
{
1. We are not using ld.so; because then the PLT entry
can't be set up, so we can't use one. In this case,
ppc_elf_adjust_dynamic_symbol won't even be called.
2. GC has rendered the entry unused.
3. We know for certain that a call to this symbol
will go to this object, or will remain undefined. */
h->plt.plist = NULL;
h->needs_plt = 0;
}
return TRUE;
}
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;
}
is not a function. */
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;
be keeping the dynamic relocs and avoiding the copy reloc. We can't
do this if there are any small data relocations. */
if (ELIMINATE_COPY_RELOCS
&& !ppc_elf_hash_entry (h)->has_sda_refs)
{
struct ppc_elf_dyn_relocs *p;
for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
{
s = p->sec->output_section;
if (s != NULL && (s->flags & SEC_READONLY) != 0)
break;
}
if (p == NULL)
{
h->non_got_ref = 0;
return TRUE;
}
}
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.
Of course, if the symbol is referenced using SDAREL relocs, we
must instead allocate it in .sbss. */
if (ppc_elf_hash_entry (h)->has_sda_refs)
s = htab->dynsbss;
else
s = htab->dynbss;
BFD_ASSERT (s != NULL);
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)
{
asection *srel;
if (ppc_elf_hash_entry (h)->has_sda_refs)
srel = htab->relsbss;
else
srel = htab->relbss;
BFD_ASSERT (srel != NULL);
srel->size += sizeof (Elf32_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->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;
}
xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
specifying the addend on the plt relocation. For -fpic code, the sym
is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
xxxxxxxx.got2.plt_pic32.<callee>. */
static bfd_boolean
add_stub_sym (struct plt_entry *ent,
struct elf_link_hash_entry *h,
struct bfd_link_info *info)
{
struct elf_link_hash_entry *sh;
size_t len1, len2, len3;
char *name;
const char *stub;
struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
if (info->shared || info->pie)
stub = ".plt_pic32.";
else
stub = ".plt_call32.";
len1 = strlen (h->root.root.string);
len2 = strlen (stub);
len3 = 0;
if (ent->sec)
len3 = strlen (ent->sec->name);
name = bfd_malloc (len1 + len2 + len3 + 9);
if (name == NULL)
return FALSE;
sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
if (ent->sec)
memcpy (name + 8, ent->sec->name, len3);
memcpy (name + 8 + len3, stub, len2);
memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
if (sh == NULL)
return FALSE;
if (sh->root.type == bfd_link_hash_new)
{
sh->root.type = bfd_link_hash_defined;
sh->root.u.def.section = htab->glink;
sh->root.u.def.value = ent->glink_offset;
sh->ref_regular = 1;
sh->def_regular = 1;
sh->ref_regular_nonweak = 1;
sh->forced_local = 1;
sh->non_elf = 0;
}
return TRUE;
}
Handles allocation of the got header when crossing 32k. */
static bfd_vma
allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
{
bfd_vma where;
unsigned int max_before_header;
if (htab->plt_type == PLT_VXWORKS)
{
where = htab->got->size;
htab->got->size += need;
}
else
{
max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
if (need <= htab->got_gap)
{
where = max_before_header - htab->got_gap;
htab->got_gap -= need;
}
else
{
if (htab->got->size + need > max_before_header
&& htab->got->size <= max_before_header)
{
htab->got_gap = max_before_header - htab->got->size;
htab->got->size = max_before_header + htab->got_header_size;
}
where = htab->got->size;
htab->got->size += need;
}
}
return where;
}
static bfd_boolean
allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
{
struct bfd_link_info *info = inf;
struct ppc_elf_link_hash_entry *eh;
struct ppc_elf_link_hash_table *htab;
struct ppc_elf_dyn_relocs *p;
if (h->root.type == bfd_link_hash_indirect)
return TRUE;
if (h->root.type == bfd_link_hash_warning)
entry in the hash table, thus we never get to see the real
symbol in a hash traversal. So look at it now. */
h = (struct elf_link_hash_entry *) h->root.u.i.link;
htab = ppc_elf_hash_table (info);
if (htab->elf.dynamic_sections_created)
{
struct plt_entry *ent;
bfd_boolean doneone = FALSE;
bfd_vma plt_offset = 0, glink_offset = 0;
for (ent = h->plt.plist; ent != NULL; ent = ent->next)
if (ent->plt.refcount > 0)
{
if (h->dynindx == -1
&& !h->forced_local)
{
if (! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
}
if (info->shared
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
{
asection *s = htab->plt;
if (htab->plt_type == PLT_NEW)
{
if (!doneone)
{
plt_offset = s->size;
s->size += 4;
}
ent->plt.offset = plt_offset;
s = htab->glink;
if (!doneone || info->shared || info->pie)
{
glink_offset = s->size;
s->size += GLINK_ENTRY_SIZE;
}
if (!doneone
&& !info->shared
&& !h->def_regular)
{
h->root.u.def.section = s;
h->root.u.def.value = glink_offset;
}
ent->glink_offset = glink_offset;
if (htab->emit_stub_syms
&& !add_stub_sym (ent, h, info))
return FALSE;
}
else
{
if (!doneone)
{
for the special first entry. */
if (s->size == 0)
s->size += htab->plt_initial_entry_size;
parts, the first part is 2 words (for a load
and a jump), and then there is a remaining
word available at the end. */
plt_offset = (htab->plt_initial_entry_size
+ (htab->plt_slot_size
* ((s->size
- htab->plt_initial_entry_size)
/ htab->plt_entry_size)));
file, and we are not generating a shared
library, then set the symbol to this location
in the .plt. This is required to make
function pointers compare as equal between
the normal executable and the shared library. */
if (! info->shared
&& !h->def_regular)
{
h->root.u.def.section = s;
h->root.u.def.value = plt_offset;
}
s->size += htab->plt_entry_size;
is allocated. */
if (htab->plt_type == PLT_OLD
&& (s->size - htab->plt_initial_entry_size)
/ htab->plt_entry_size
> PLT_NUM_SINGLE_ENTRIES)
s->size += htab->plt_entry_size;
}
ent->plt.offset = plt_offset;
}
if (!doneone)
{
htab->relplt->size += sizeof (Elf32_External_Rela);
if (htab->plt_type == PLT_VXWORKS)
{
if (!info->shared)
{
if (ent->plt.offset
== (bfd_vma) htab->plt_initial_entry_size)
{
htab->srelplt2->size
+= sizeof (Elf32_External_Rela)
* VXWORKS_PLTRESOLVE_RELOCS;
}
htab->srelplt2->size
+= sizeof (Elf32_External_Rela)
* VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
}
.got.plt. */
htab->sgotplt->size += 4;
}
doneone = TRUE;
}
}
else
ent->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_elf_link_hash_entry *) h;
if (eh->elf.got.refcount > 0)
{
if (eh->elf.dynindx == -1
&& !eh->elf.forced_local)
{
if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
return FALSE;
}
if (eh->tls_mask == (TLS_TLS | TLS_LD)
&& !eh->elf.def_dynamic)
eh->elf.got.offset = (bfd_vma) -1;
else
{
bfd_boolean dyn;
unsigned int need = 0;
if ((eh->tls_mask & TLS_TLS) != 0)
{
if ((eh->tls_mask & TLS_LD) != 0)
need += 8;
if ((eh->tls_mask & TLS_GD) != 0)
need += 8;
if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
need += 4;
if ((eh->tls_mask & TLS_DTPREL) != 0)
need += 4;
}
else
need += 4;
eh->elf.got.offset = allocate_got (htab, need);
dyn = htab->elf.dynamic_sections_created;
if ((info->shared
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
&& (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
|| eh->elf.root.type != bfd_link_hash_undefweak))
{
Except LD only needs one. */
if ((eh->tls_mask & TLS_LD) != 0)
need -= 4;
htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
}
}
}
else
eh->elf.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_elf_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;
symbol in PIEs. */
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 (Elf32_External_Rela);
}
return TRUE;
}
static bfd_boolean
readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
{
struct ppc_elf_dyn_relocs *p;
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;
for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
{
asection *s = p->sec->output_section;
if (s != NULL
&& ((s->flags & (SEC_READONLY | SEC_ALLOC))
== (SEC_READONLY | SEC_ALLOC)))
{
((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
return FALSE;
}
}
return TRUE;
}
static bfd_boolean
ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info)
{
struct ppc_elf_link_hash_table *htab;
asection *s;
bfd_boolean relocs;
bfd *ibfd;
#ifdef DEBUG
fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
#endif
htab = ppc_elf_hash_table (info);
BFD_ASSERT (htab->elf.dynobj != NULL);
if (elf_hash_table (info)->dynamic_sections_created)
{
if (info->executable)
{
s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
BFD_ASSERT (s != NULL);
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
}
}
if (htab->plt_type == PLT_OLD)
htab->got_header_size = 16;
else if (htab->plt_type == PLT_NEW)
htab->got_header_size = 12;
relocs. */
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
{
bfd_signed_vma *local_got;
bfd_signed_vma *end_local_got;
char *lgot_masks;
bfd_size_type locsymcount;
Elf_Internal_Shdr *symtab_hdr;
if (!is_ppc_elf_target (ibfd->xvec))
continue;
for (s = ibfd->sections; s != NULL; s = s->next)
{
struct ppc_elf_dyn_relocs *p;
for (p = ((struct ppc_elf_dyn_relocs *)
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)
{
elf_section_data (p->sec)->sreloc->size
+= p->count * sizeof (Elf32_External_Rela);
if ((p->sec->output_section->flags
& (SEC_READONLY | SEC_ALLOC))
== (SEC_READONLY | SEC_ALLOC))
info->flags |= DF_TEXTREL;
}
}
}
local_got = elf_local_got_refcounts (ibfd);
if (!local_got)
continue;
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
locsymcount = symtab_hdr->sh_info;
end_local_got = local_got + locsymcount;
lgot_masks = (char *) end_local_got;
for (; local_got < end_local_got; ++local_got, ++lgot_masks)
if (*local_got > 0)
{
if (*lgot_masks == (TLS_TLS | TLS_LD))
{
htab->tlsld_got.offset. */
htab->tlsld_got.refcount += 1;
*local_got = (bfd_vma) -1;
}
else
{
unsigned int need = 0;
if ((*lgot_masks & TLS_TLS) != 0)
{
if ((*lgot_masks & TLS_GD) != 0)
need += 8;
if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
need += 4;
if ((*lgot_masks & TLS_DTPREL) != 0)
need += 4;
}
else
need += 4;
*local_got = allocate_got (htab, need);
if (info->shared)
htab->relgot->size += (need
* (sizeof (Elf32_External_Rela) / 4));
}
}
else
*local_got = (bfd_vma) -1;
}
if (htab->tlsld_got.refcount > 0)
{
htab->tlsld_got.offset = allocate_got (htab, 8);
if (info->shared)
htab->relgot->size += sizeof (Elf32_External_Rela);
}
else
htab->tlsld_got.offset = (bfd_vma) -1;
elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
{
unsigned int g_o_t = 32768;
for old plt/got the got size will be 0 to 32764 (not allocated),
or 32780 to 65536 (header allocated). For new plt/got, the
corresponding ranges are 0 to 32768 and 32780 to 65536. */
if (htab->got->size <= 32768)
{
g_o_t = htab->got->size;
if (htab->plt_type == PLT_OLD)
g_o_t += 4;
htab->got->size += htab->got_header_size;
}
htab->elf.hgot->root.u.def.value = g_o_t;
}
if (htab->glink != NULL && htab->glink->size != 0)
{
htab->glink_pltresolve = htab->glink->size;
htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
htab->glink->size += -htab->glink->size & 15;
htab->glink->size += GLINK_PLTRESOLVE;
if (htab->emit_stub_syms)
{
struct elf_link_hash_entry *sh;
sh = elf_link_hash_lookup (&htab->elf, "__glink",
TRUE, FALSE, FALSE);
if (sh == NULL)
return FALSE;
if (sh->root.type == bfd_link_hash_new)
{
sh->root.type = bfd_link_hash_defined;
sh->root.u.def.section = htab->glink;
sh->root.u.def.value = htab->glink_pltresolve;
sh->ref_regular = 1;
sh->def_regular = 1;
sh->ref_regular_nonweak = 1;
sh->forced_local = 1;
sh->non_elf = 0;
}
sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
TRUE, FALSE, FALSE);
if (sh == NULL)
return FALSE;
if (sh->root.type == bfd_link_hash_new)
{
sh->root.type = bfd_link_hash_defined;
sh->root.u.def.section = htab->glink;
sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
sh->ref_regular = 1;
sh->def_regular = 1;
sh->ref_regular_nonweak = 1;
sh->forced_local = 1;
sh->non_elf = 0;
}
}
}
Allocate memory for them. */
relocs = FALSE;
for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
{
bfd_boolean strip_section = TRUE;
if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
if (s == htab->plt
|| s == htab->glink
|| s == htab->got
|| s == htab->sgotplt
|| s == htab->sbss
|| s == htab->dynbss
|| s == htab->dynsbss)
{
we've exported dynamic symbols from them we must leave them.
It's too late to tell BFD to get rid of the symbols. */
if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
strip_section = FALSE;
comment below. */
}
else if (s == htab->sdata[0].section
|| s == htab->sdata[1].section)
{
}
else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
{
if (s->size != 0)
{
relocs = TRUE;
to copy relocs into the output file. */
s->reloc_count = 0;
}
}
else
{
continue;
}
if (s->size == 0 && strip_section)
{
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;
s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
if (s->contents == NULL)
return FALSE;
}
if (htab->elf.dynamic_sections_created)
{
values later, in ppc_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))
return FALSE;
}
if (htab->glink != NULL && htab->glink->size != 0)
{
if (!add_dynamic_entry (DT_PPC_GOT, 0))
return FALSE;
}
if (relocs)
{
if (!add_dynamic_entry (DT_RELA, 0)
|| !add_dynamic_entry (DT_RELASZ, 0)
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
return FALSE;
}
need a DT_TEXTREL entry. */
if ((info->flags & DF_TEXTREL) == 0)
elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
info);
if ((info->flags & DF_TEXTREL) != 0)
{
if (!add_dynamic_entry (DT_TEXTREL, 0))
return FALSE;
}
}
#undef add_dynamic_entry
return TRUE;
}
#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
static const int shared_stub_entry[] =
{
0x7c0802a6,
0x429f0005,
0x7d6802a6,
0x3d6b0000,
0x396b0018,
0x7c0803a6,
0x7d6903a6,
0x4e800420,
};
static const int stub_entry[] =
{
0x3d600000,
0x396b0000,
0x7d6903a6,
0x4e800420,
};
static bfd_boolean
ppc_elf_relax_section (bfd *abfd,
asection *isec,
struct bfd_link_info *link_info,
bfd_boolean *again)
{
struct one_fixup
{
struct one_fixup *next;
asection *tsec;
bfd_vma toff;
bfd_vma trampoff;
};
Elf_Internal_Shdr *symtab_hdr;
bfd_byte *contents = NULL;
Elf_Internal_Sym *isymbuf = NULL;
Elf_Internal_Rela *internal_relocs = NULL;
Elf_Internal_Rela *irel, *irelend;
struct one_fixup *fixups = NULL;
bfd_boolean changed;
struct ppc_elf_link_hash_table *htab;
bfd_size_type trampoff;
asection *got2;
*again = FALSE;
anything with non-alloc sections. */
if ((isec->flags & SEC_ALLOC) == 0
|| (isec->flags & SEC_RELOC) == 0
|| isec->reloc_count == 0)
return TRUE;
trampoff = (isec->size + 3) & (bfd_vma) -4;
trampoff += 4;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
link_info->keep_memory);
if (internal_relocs == NULL)
goto error_return;
htab = ppc_elf_hash_table (link_info);
got2 = bfd_get_section_by_name (abfd, ".got2");
irelend = internal_relocs + isec->reloc_count;
for (irel = internal_relocs; irel < irelend; irel++)
{
unsigned long r_type = ELF32_R_TYPE (irel->r_info);
bfd_vma symaddr, reladdr, toff, roff;
asection *tsec;
struct one_fixup *f;
size_t insn_offset = 0;
bfd_vma max_branch_offset, val;
bfd_byte *hit_addr;
unsigned long t0;
unsigned char sym_type;
switch (r_type)
{
case R_PPC_REL24:
case R_PPC_LOCAL24PC:
case R_PPC_PLTREL24:
max_branch_offset = 1 << 25;
break;
case R_PPC_REL14:
case R_PPC_REL14_BRTAKEN:
case R_PPC_REL14_BRNTAKEN:
max_branch_offset = 1 << 15;
break;
default:
continue;
}
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
{
Elf_Internal_Sym *isym;
if (isymbuf == NULL)
{
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
if (isymbuf == NULL)
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
symtab_hdr->sh_info, 0,
NULL, NULL, NULL);
if (isymbuf == 0)
goto error_return;
}
isym = isymbuf + ELF32_R_SYM (irel->r_info);
if (isym->st_shndx == SHN_UNDEF)
continue;
else if (isym->st_shndx == SHN_ABS)
tsec = bfd_abs_section_ptr;
else if (isym->st_shndx == SHN_COMMON)
tsec = bfd_com_section_ptr;
else
tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
toff = isym->st_value;
sym_type = ELF_ST_TYPE (isym->st_info);
}
else
{
unsigned long indx;
struct elf_link_hash_entry *h;
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
h = elf_sym_hashes (abfd)[indx];
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;
tsec = NULL;
toff = 0;
if (r_type == R_PPC_PLTREL24
&& htab->plt != NULL)
{
struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
if (ent != NULL)
{
if (htab->plt_type == PLT_NEW)
{
tsec = htab->glink;
toff = ent->glink_offset;
}
else
{
tsec = htab->plt;
toff = ent->plt.offset;
}
}
}
if (tsec != NULL)
;
else if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
tsec = h->root.u.def.section;
toff = h->root.u.def.value;
}
else
continue;
sym_type = h->type;
}
no hope of adding stubs. We'll error out later should the
branch overflow. */
if (tsec == isec)
continue;
SEC_MERGE sections; SEC_MERGE doesn't seem a likely
attribute for a code section, and we are only looking at
branches. However, implement it correctly here as a
reference for other target relax_section functions. */
if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
{
adjusted, so all references to such symbols need to be
passed through _bfd_merged_section_offset. (Later, in
relocate_section, all SEC_MERGE symbols *except* for
section symbols have been adjusted.)
gas may reduce relocations against symbols in SEC_MERGE
sections to a relocation against the section symbol when
the original addend was zero. When the reloc is against
a section symbol we should include the addend in the
offset passed to _bfd_merged_section_offset, since the
location of interest is the original symbol. On the
other hand, an access to "sym+addend" where "sym" is not
a section symbol should not include the addend; Such an
access is presumed to be an offset from "sym"; The
location of interest is just "sym". */
if (sym_type == STT_SECTION)
toff += irel->r_addend;
toff = _bfd_merged_section_offset (abfd, &tsec,
elf_section_data (tsec)->sec_info,
toff);
if (sym_type != STT_SECTION)
toff += irel->r_addend;
}
else if (r_type != R_PPC_PLTREL24)
toff += irel->r_addend;
if (tsec->output_section == NULL)
continue;
symaddr = tsec->output_section->vma + tsec->output_offset + toff;
roff = irel->r_offset;
reladdr = isec->output_section->vma + isec->output_offset + roff;
if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
continue;
for (f = fixups; f ; f = f->next)
if (f->tsec == tsec && f->toff == toff)
break;
if (f == NULL)
{
size_t size;
unsigned long stub_rtype;
val = trampoff - roff;
if (val >= max_branch_offset)
one. We'll report an error later. */
continue;
if (link_info->shared)
{
size = 4 * ARRAY_SIZE (shared_stub_entry);
insn_offset = 12;
stub_rtype = R_PPC_RELAX32PC;
}
else
{
size = 4 * ARRAY_SIZE (stub_entry);
insn_offset = 0;
stub_rtype = R_PPC_RELAX32;
}
if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
!= R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
abort ();
if (tsec == htab->plt
|| tsec == htab->glink)
stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
relocations for this use a "composite" reloc. */
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
stub_rtype);
irel->r_offset = trampoff + insn_offset;
f = bfd_malloc (sizeof (*f));
f->next = fixups;
f->tsec = tsec;
f->toff = toff;
f->trampoff = trampoff;
fixups = f;
trampoff += size;
}
else
{
val = f->trampoff - roff;
if (val >= max_branch_offset)
continue;
irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
}
if (contents == NULL)
{
if (elf_section_data (isec)->this_hdr.contents != NULL)
contents = elf_section_data (isec)->this_hdr.contents;
else
{
if (!bfd_malloc_and_get_section (abfd, isec, &contents))
goto error_return;
}
}
hit_addr = contents + roff;
switch (r_type)
{
case R_PPC_REL24:
case R_PPC_LOCAL24PC:
case R_PPC_PLTREL24:
t0 = bfd_get_32 (abfd, hit_addr);
t0 &= ~0x3fffffc;
t0 |= val & 0x3fffffc;
bfd_put_32 (abfd, t0, hit_addr);
break;
case R_PPC_REL14:
case R_PPC_REL14_BRTAKEN:
case R_PPC_REL14_BRNTAKEN:
t0 = bfd_get_32 (abfd, hit_addr);
t0 &= ~0xfffc;
t0 |= val & 0xfffc;
bfd_put_32 (abfd, t0, hit_addr);
break;
}
}
changed = fixups != NULL;
if (fixups != NULL)
{
const int *stub;
bfd_byte *dest;
bfd_vma val;
int i, size;
do
{
struct one_fixup *f = fixups;
fixups = fixups->next;
free (f);
}
while (fixups);
contents = bfd_realloc (contents, trampoff);
if (contents == NULL)
goto error_return;
isec->size = (isec->size + 3) & (bfd_vma) -4;
val = trampoff - isec->size + 0x48000000;
dest = contents + isec->size;
isec->size = trampoff;
bfd_put_32 (abfd, val, dest);
dest += 4;
if (link_info->shared)
{
stub = shared_stub_entry;
size = ARRAY_SIZE (shared_stub_entry);
}
else
{
stub = stub_entry;
size = ARRAY_SIZE (stub_entry);
}
i = 0;
while (dest < contents + trampoff)
{
bfd_put_32 (abfd, stub[i], dest);
i++;
if (i == size)
i = 0;
dest += 4;
}
BFD_ASSERT (i == 0);
}
if (isymbuf != NULL
&& symtab_hdr->contents != (unsigned char *) isymbuf)
{
if (! link_info->keep_memory)
free (isymbuf);
else
{
symtab_hdr->contents = (unsigned char *) isymbuf;
}
}
if (contents != NULL
&& elf_section_data (isec)->this_hdr.contents != contents)
{
if (!changed && !link_info->keep_memory)
free (contents);
else
{
elf_section_data (isec)->this_hdr.contents = contents;
}
}
if (elf_section_data (isec)->relocs != internal_relocs)
{
if (!changed)
free (internal_relocs);
else
elf_section_data (isec)->relocs = internal_relocs;
}
*again = changed;
return TRUE;
error_return:
if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
free (isymbuf);
if (contents != NULL
&& elf_section_data (isec)->this_hdr.contents != contents)
free (contents);
if (internal_relocs != NULL
&& elf_section_data (isec)->relocs != internal_relocs)
free (internal_relocs);
return FALSE;
}
discarded sections. */
static unsigned int
ppc_elf_action_discarded (asection *sec)
{
if (strcmp (".fixup", sec->name) == 0)
return 0;
if (strcmp (".got2", sec->name) == 0)
return 0;
return _bfd_elf_default_action_discarded (sec);
}
static bfd_vma
elf_finish_pointer_linker_section (bfd *input_bfd,
elf_linker_section_t *lsect,
struct elf_link_hash_entry *h,
bfd_vma relocation,
const Elf_Internal_Rela *rel)
{
elf_linker_section_pointers_t *linker_section_ptr;
BFD_ASSERT (lsect != NULL);
if (h != NULL)
{
struct ppc_elf_link_hash_entry *eh;
eh = (struct ppc_elf_link_hash_entry *) h;
BFD_ASSERT (eh->elf.def_regular);
linker_section_ptr = eh->linker_section_pointer;
}
else
{
unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
}
linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
rel->r_addend,
lsect);
BFD_ASSERT (linker_section_ptr != NULL);
as a "written" flag. */
if ((linker_section_ptr->offset & 1) == 0)
{
bfd_put_32 (lsect->section->owner,
relocation + linker_section_ptr->addend,
lsect->section->contents + linker_section_ptr->offset);
linker_section_ptr->offset += 1;
}
relocation = (lsect->section->output_offset
+ linker_section_ptr->offset - 1
- 0x8000);
#ifdef DEBUG
fprintf (stderr,
"Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
lsect->name, (long) relocation, (long) relocation);
#endif
processing. */
return relocation - linker_section_ptr->addend;
}
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
ppc_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)
{
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
struct ppc_elf_link_hash_table *htab;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
Elf_Internal_Rela outrel;
bfd_byte *loc;
asection *got2, *sreloc = NULL;
bfd_vma *local_got_offsets;
bfd_boolean ret = TRUE;
#ifdef DEBUG
_bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
"%ld relocations%s",
input_bfd, input_section,
(long) input_section->reloc_count,
(info->relocatable) ? " (relocatable)" : "");
#endif
got2 = bfd_get_section_by_name (input_bfd, ".got2");
if (info->relocatable)
{
if (got2 == NULL)
return TRUE;
rel = relocs;
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
{
enum elf_ppc_reloc_type r_type;
r_type = ELF32_R_TYPE (rel->r_info);
if (r_type == R_PPC_PLTREL24
&& rel->r_addend >= 32768)
{
addend specifies the GOT pointer offset within .got2. */
rel->r_addend += got2->output_offset;
}
}
return TRUE;
}
if (!ppc_elf_howto_table[R_PPC_ADDR32])
ppc_elf_howto_init ();
htab = ppc_elf_hash_table (info);
local_got_offsets = elf_local_got_offsets (input_bfd);
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
rel = relocs;
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
{
enum elf_ppc_reloc_type r_type;
bfd_vma addend;
bfd_reloc_status_type r;
Elf_Internal_Sym *sym;
asection *sec;
struct elf_link_hash_entry *h;
const char *sym_name;
reloc_howto_type *howto;
unsigned long r_symndx;
bfd_vma relocation;
bfd_vma branch_bit, insn, from;
bfd_boolean unresolved_reloc;
bfd_boolean warned;
unsigned int tls_type, tls_mask, tls_gd;
r_type = ELF32_R_TYPE (rel->r_info);
sym = NULL;
sec = NULL;
h = NULL;
unresolved_reloc = FALSE;
warned = FALSE;
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
}
else
{
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
r_symndx, symtab_hdr, sym_hashes,
h, sec, relocation,
unresolved_reloc, warned);
sym_name = h->root.root.string;
}
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;
if (IS_PPC_TLS_RELOC (r_type))
{
if (h != NULL)
tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
else if (local_got_offsets != NULL)
{
char *lgot_masks;
lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
tls_mask = lgot_masks[r_symndx];
}
}
if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
|| (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
|| (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
|| (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
|| (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
|| (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
|| (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
|| (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
abort ();
switch (r_type)
{
default:
break;
case R_PPC_GOT_TPREL16:
case R_PPC_GOT_TPREL16_LO:
if (tls_mask != 0
&& (tls_mask & TLS_TPREL) == 0)
{
bfd_vma insn;
insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
insn &= 31 << 21;
insn |= 0x3c020000;
bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
r_type = R_PPC_TPREL16_HA;
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
}
break;
case R_PPC_TLS:
if (tls_mask != 0
&& (tls_mask & TLS_TPREL) == 0)
{
bfd_vma insn, rtra;
insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
if ((insn & ((31 << 26) | (31 << 11)))
== ((31 << 26) | (2 << 11)))
rtra = insn & ((1 << 26) - (1 << 16));
else if ((insn & ((31 << 26) | (31 << 16)))
== ((31 << 26) | (2 << 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);
r_type = R_PPC_TPREL16_LO;
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
PPC_TPREL16_LO which is at insn+2. */
rel->r_offset += 2;
}
break;
case R_PPC_GOT_TLSGD16_HI:
case R_PPC_GOT_TLSGD16_HA:
tls_gd = TLS_TPRELGD;
if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
goto tls_gdld_hi;
break;
case R_PPC_GOT_TLSLD16_HI:
case R_PPC_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_PPC_GOT_TLSGD16 & 3)) & 3)
+ R_PPC_GOT_TPREL16);
else
{
bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
rel->r_offset -= 2;
r_type = R_PPC_NONE;
}
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
}
break;
case R_PPC_GOT_TLSGD16:
case R_PPC_GOT_TLSGD16_LO:
tls_gd = TLS_TPRELGD;
if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
goto tls_get_addr_check;
break;
case R_PPC_GOT_TLSLD16:
case R_PPC_GOT_TLSLD16_LO:
if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
{
tls_get_addr_check:
if (rel + 1 < relend)
{
enum elf_ppc_reloc_type r_type2;
unsigned long r_symndx2;
struct elf_link_hash_entry *h2;
bfd_vma insn1, insn2;
bfd_vma offset;
__tls_get_addr. Peek at the reloc to be sure. */
r_type2 = ELF32_R_TYPE (rel[1].r_info);
r_symndx2 = ELF32_R_SYM (rel[1].r_info);
if (r_symndx2 < symtab_hdr->sh_info
|| (r_type2 != R_PPC_REL14
&& r_type2 != R_PPC_REL14_BRTAKEN
&& r_type2 != R_PPC_REL14_BRNTAKEN
&& r_type2 != R_PPC_REL24
&& r_type2 != R_PPC_PLTREL24))
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)
break;
offset = rel[1].r_offset;
insn1 = bfd_get_32 (output_bfd,
contents + rel->r_offset - 2);
if ((tls_mask & tls_gd) != 0)
{
insn1 &= (1 << 26) - 1;
insn1 |= 32 << 26;
insn2 = 0x7c631214;
rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
rel[1].r_addend = 0;
r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
+ R_PPC_GOT_TPREL16);
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
}
else
{
insn1 = 0x3c620000;
insn2 = 0x38630000;
if (tls_gd == 0)
{
r_symndx = 0;
rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
}
r_type = R_PPC_TPREL16_HA;
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
rel[1].r_info = ELF32_R_INFO (r_symndx,
R_PPC_TPREL16_LO);
rel[1].r_offset += 2;
rel[1].r_addend = rel->r_addend;
}
bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
bfd_put_32 (output_bfd, insn2, contents + offset);
if (tls_gd == 0)
{
in order to get h, sym, sec etc. right. */
rel--;
continue;
}
}
}
break;
}
branch_bit = 0;
switch (r_type)
{
default:
break;
case R_PPC_ADDR14_BRTAKEN:
case R_PPC_REL14_BRTAKEN:
branch_bit = BRANCH_PREDICT_BIT;
case R_PPC_ADDR14_BRNTAKEN:
case R_PPC_REL14_BRNTAKEN:
insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
insn &= ~BRANCH_PREDICT_BIT;
insn |= branch_bit;
from = (rel->r_offset
+ input_section->output_offset
+ input_section->output_section->vma);
if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
insn ^= BRANCH_PREDICT_BIT;
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
break;
}
addend = rel->r_addend;
tls_type = 0;
howto = NULL;
if (r_type < R_PPC_max)
howto = ppc_elf_howto_table[r_type];
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_PPC_NONE:
case R_PPC_TLS:
case R_PPC_EMB_MRKREF:
case R_PPC_GNU_VTINHERIT:
case R_PPC_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_PPC_GOT_TLSGD16:
case R_PPC_GOT_TLSGD16_LO:
case R_PPC_GOT_TLSGD16_HI:
case R_PPC_GOT_TLSGD16_HA:
tls_type = TLS_TLS | TLS_GD;
goto dogot;
case R_PPC_GOT_TLSLD16:
case R_PPC_GOT_TLSLD16_LO:
case R_PPC_GOT_TLSLD16_HI:
case R_PPC_GOT_TLSLD16_HA:
tls_type = TLS_TLS | TLS_LD;
goto dogot;
case R_PPC_GOT_TPREL16:
case R_PPC_GOT_TPREL16_LO:
case R_PPC_GOT_TPREL16_HI:
case R_PPC_GOT_TPREL16_HA:
tls_type = TLS_TLS | TLS_TPREL;
goto dogot;
case R_PPC_GOT_DTPREL16:
case R_PPC_GOT_DTPREL16_LO:
case R_PPC_GOT_DTPREL16_HI:
case R_PPC_GOT_DTPREL16_HA:
tls_type = TLS_TLS | TLS_DTPREL;
goto dogot;
case R_PPC_GOT16:
case R_PPC_GOT16_LO:
case R_PPC_GOT16_HI:
case R_PPC_GOT16_HA:
dogot:
{
offset table. */
bfd_vma off;
bfd_vma *offp;
unsigned long indx;
if (htab->got == NULL)
abort ();
indx = 0;
if (tls_type == (TLS_TLS | TLS_LD)
&& (h == NULL
|| !h->def_dynamic))
offp = &htab->tlsld_got.offset;
else if (h != NULL)
{
bfd_boolean dyn;
dyn = htab->elf.dynamic_sections_created;
if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
|| (info->shared
&& SYMBOL_REFERENCES_LOCAL (info, h)))
-Bsymbolic link and the symbol is defined
locally, or the symbol was forced to be local
because of a version file. */
;
else
{
indx = h->dynindx;
unresolved_reloc = FALSE;
}
offp = &h->got.offset;
}
else
{
if (local_got_offsets == NULL)
abort ();
offp = &local_got_offsets[r_symndx];
}
least significant bit to record whether we have already
processed this entry. */
off = *offp;
if ((off & 1) != 0)
off &= ~1;
else
{
unsigned int tls_m = (tls_mask
& (TLS_LD | TLS_GD | TLS_DTPREL
| TLS_TPREL | TLS_TPRELGD));
if (offp == &htab->tlsld_got.offset)
tls_m = TLS_LD;
else if (h == NULL
|| !h->def_dynamic)
tls_m &= ~TLS_LD;
Initialize them all. */
do
{
int tls_ty = 0;
if ((tls_m & TLS_LD) != 0)
{
tls_ty = TLS_TLS | TLS_LD;
tls_m &= ~TLS_LD;
}
else if ((tls_m & TLS_GD) != 0)
{
tls_ty = TLS_TLS | TLS_GD;
tls_m &= ~TLS_GD;
}
else if ((tls_m & TLS_DTPREL) != 0)
{
tls_ty = TLS_TLS | TLS_DTPREL;
tls_m &= ~TLS_DTPREL;
}
else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
{
tls_ty = TLS_TLS | TLS_TPREL;
tls_m = 0;
}
if ((info->shared || indx != 0)
&& (h == NULL
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak))
{
outrel.r_offset = (htab->got->output_section->vma
+ htab->got->output_offset
+ off);
outrel.r_addend = 0;
if (tls_ty & (TLS_LD | TLS_GD))
{
outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
if (tls_ty == (TLS_TLS | TLS_GD))
{
loc = htab->relgot->contents;
loc += (htab->relgot->reloc_count++
* sizeof (Elf32_External_Rela));
bfd_elf32_swap_reloca_out (output_bfd,
&outrel, loc);
outrel.r_offset += 4;
outrel.r_info
= ELF32_R_INFO (indx, R_PPC_DTPREL32);
}
}
else if (tls_ty == (TLS_TLS | TLS_DTPREL))
outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
else if (tls_ty == (TLS_TLS | TLS_TPREL))
outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
else if (indx == 0)
outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
else
outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
if (indx == 0)
{
outrel.r_addend += relocation;
if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
outrel.r_addend -= htab->elf.tls_sec->vma;
}
loc = htab->relgot->contents;
loc += (htab->relgot->reloc_count++
* sizeof (Elf32_External_Rela));
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
}
emitting a reloc. */
else
{
bfd_vma value = relocation;
if (tls_ty == (TLS_TLS | TLS_LD))
value = 1;
else if (tls_ty != 0)
{
value -= htab->elf.tls_sec->vma + DTP_OFFSET;
if (tls_ty == (TLS_TLS | TLS_TPREL))
value += DTP_OFFSET - TP_OFFSET;
if (tls_ty == (TLS_TLS | TLS_GD))
{
bfd_put_32 (output_bfd, value,
htab->got->contents + off + 4);
value = 1;
}
}
bfd_put_32 (output_bfd, value,
htab->got->contents + off);
}
off += 4;
if (tls_ty & (TLS_LD | TLS_GD))
off += 4;
}
while (tls_m != 0);
off = *offp;
*offp = off | 1;
}
if (off >= (bfd_vma) -2)
abort ();
if ((tls_type & TLS_TLS) != 0)
{
if (tls_type != (TLS_TLS | TLS_LD))
{
if ((tls_mask & TLS_LD) != 0
&& !(h == NULL
|| !h->def_dynamic))
off += 8;
if (tls_type != (TLS_TLS | TLS_GD))
{
if ((tls_mask & TLS_GD) != 0)
off += 8;
if (tls_type != (TLS_TLS | TLS_DTPREL))
{
if ((tls_mask & TLS_DTPREL) != 0)
off += 4;
}
}
}
}
relocation = htab->got->output_offset + off;
relocation -= htab->elf.hgot->root.u.def.value;
x+off@got is actually x@got+off, and since the got is
generated by a hash table traversal, the value in the
got at entry m+n bears little relation to the entry m. */
if (addend != 0)
(*_bfd_error_handler)
(_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
input_bfd,
input_section,
(long) rel->r_offset,
howto->name,
sym_name);
}
break;
case R_PPC_LOCAL24PC:
at a symbol not in this object. */
if (unresolved_reloc)
{
if (! (*info->callbacks->undefined_symbol) (info,
h->root.root.string,
input_bfd,
input_section,
rel->r_offset,
TRUE))
return FALSE;
continue;
}
break;
case R_PPC_DTPREL16:
case R_PPC_DTPREL16_LO:
case R_PPC_DTPREL16_HI:
case R_PPC_DTPREL16_HA:
addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
break;
object. */
case R_PPC_TPREL16:
case R_PPC_TPREL16_LO:
case R_PPC_TPREL16_HI:
case R_PPC_TPREL16_HA:
addend -= htab->elf.tls_sec->vma + TP_OFFSET;
libs as they will result in DT_TEXTREL being set, but
support them anyway. */
goto dodyn;
case R_PPC_TPREL32:
addend -= htab->elf.tls_sec->vma + TP_OFFSET;
goto dodyn;
case R_PPC_DTPREL32:
addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
goto dodyn;
case R_PPC_DTPMOD32:
relocation = 1;
addend = 0;
goto dodyn;
case R_PPC_REL16:
case R_PPC_REL16_LO:
case R_PPC_REL16_HI:
case R_PPC_REL16_HA:
break;
case R_PPC_REL24:
case R_PPC_REL32:
case R_PPC_REL14:
case R_PPC_REL14_BRTAKEN:
case R_PPC_REL14_BRNTAKEN:
handled right here, no need to bother the dynamic linker. */
if (SYMBOL_REFERENCES_LOCAL (info, h)
|| h == htab->elf.hgot)
break;
object. */
case R_PPC_ADDR32:
case R_PPC_ADDR24:
case R_PPC_ADDR16:
case R_PPC_ADDR16_LO:
case R_PPC_ADDR16_HI:
case R_PPC_ADDR16_HA:
case R_PPC_ADDR14:
case R_PPC_ADDR14_BRTAKEN:
case R_PPC_ADDR14_BRNTAKEN:
case R_PPC_UADDR32:
case R_PPC_UADDR16:
from removed linkonce sections, or sections discarded by
a linker script. */
dodyn:
if (r_symndx == 0)
break;
if ((input_section->flags & SEC_ALLOC) == 0)
break;
if ((info->shared
&& (h == NULL
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak)
&& (MUST_BE_DYN_RELOC (r_type)
|| !SYMBOL_CALLS_LOCAL (info, h)))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
&& h != NULL
&& h->dynindx != -1
&& !h->non_got_ref
&& h->def_dynamic
&& !h->def_regular))
{
int skip;
#ifdef DEBUG
fprintf (stderr, "ppc_elf_relocate_section needs to "
"create relocation for %s\n",
(h && h->root.root.string
? h->root.root.string : "<unknown>"));
#endif
are copied into the output file to be resolved at run
time. */
if (sreloc == NULL)
{
const char *name;
name = (bfd_elf_string_from_elf_section
(input_bfd,
elf_elfheader (input_bfd)->e_shstrndx,
elf_section_data (input_section)->rel_hdr.sh_name));
if (name == NULL)
return FALSE;
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
&& strcmp (bfd_get_section_name (input_bfd,
input_section),
name + 5) == 0);
sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
BFD_ASSERT (sreloc != NULL);
}
skip = 0;
outrel.r_offset =
_bfd_elf_section_offset (output_bfd, info, input_section,
rel->r_offset);
if (outrel.r_offset == (bfd_vma) -1
|| outrel.r_offset == (bfd_vma) -2)
skip = (int) outrel.r_offset;
outrel.r_offset += (input_section->output_section->vma
+ input_section->output_offset);
if (skip)
memset (&outrel, 0, sizeof outrel);
else if (!SYMBOL_REFERENCES_LOCAL (info, h))
{
unresolved_reloc = FALSE;
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
outrel.r_addend = rel->r_addend;
}
else
{
outrel.r_addend = relocation + rel->r_addend;
if (r_type == R_PPC_ADDR32)
outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
else
{
long indx;
if (bfd_is_abs_section (sec))
indx = 0;
else if (sec == NULL || sec->owner == NULL)
{
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
else
{
asection *osec;
against a section symbol. It would be
proper to subtract the symbol's value,
osec->vma, from the emitted reloc addend,
but ld.so expects buggy relocs. */
osec = sec->output_section;
indx = elf_section_data (osec)->dynindx;
BFD_ASSERT (indx > 0);
#ifdef DEBUG
if (indx <= 0)
printf ("indx=%d section=%s flags=%08x name=%s\n",
indx, osec->name, osec->flags,
h->root.root.string);
#endif
}
outrel.r_info = ELF32_R_INFO (indx, r_type);
}
}
loc = sreloc->contents;
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
if (skip == -1)
continue;
so that it contains predictable value. */
if (! skip
&& ((input_section->flags & SEC_ALLOC) != 0
|| ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
{
relocation = howto->pc_relative ? outrel.r_offset : 0;
addend = 0;
break;
}
}
break;
case R_PPC_RELAX32PC_PLT:
case R_PPC_RELAX32_PLT:
{
struct plt_entry *ent = find_plt_ent (h, got2, addend);
if (htab->plt_type == PLT_NEW)
relocation = (htab->glink->output_section->vma
+ htab->glink->output_offset
+ ent->glink_offset);
else
relocation = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ ent->plt.offset);
addend = 0;
}
if (r_type == R_PPC_RELAX32_PLT)
goto relax32;
case R_PPC_RELAX32PC:
relocation -= (input_section->output_section->vma
+ input_section->output_offset
+ rel->r_offset - 4);
case R_PPC_RELAX32:
relax32:
{
unsigned long t0;
unsigned long t1;
t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
and R_PPC_ADDR16_LO here. */
t0 &= ~0xffff;
t1 &= ~0xffff;
relocation += addend;
t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
t1 |= relocation & 0xffff;
bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
}
continue;
case R_PPC_EMB_SDAI16:
BFD_ASSERT (htab->sdata[0].section != NULL);
relocation
= elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
h, relocation, rel);
break;
case R_PPC_EMB_SDA2I16:
BFD_ASSERT (htab->sdata[1].section != NULL);
relocation
= elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
h, relocation, rel);
break;
section, not the actual VMA. This is appropriate when generating
an embedded ELF object, for which the .got section acts like the
AIX .toc section. */
case R_PPC_TOC16:
BFD_ASSERT (sec != NULL);
BFD_ASSERT (bfd_is_und_section (sec)
|| strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
|| strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
addend -= sec->output_section->vma + sec->output_offset + 0x8000;
break;
case R_PPC_PLTREL24:
procedure linkage table. */
{
struct plt_entry *ent = find_plt_ent (h, got2, addend);
addend = 0;
if (ent == NULL
|| htab->plt == NULL)
{
happens when statically linking PIC code, or when
using -Bsymbolic. */
break;
}
unresolved_reloc = FALSE;
if (htab->plt_type == PLT_NEW)
relocation = (htab->glink->output_section->vma
+ htab->glink->output_offset
+ ent->glink_offset);
else
relocation = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ ent->plt.offset);
}
break;
case R_PPC_SDAREL16:
{
const char *name;
struct elf_link_hash_entry *sh;
BFD_ASSERT (sec != NULL);
name = bfd_get_section_name (abfd, sec->output_section);
if (! ((strncmp (name, ".sdata", 6) == 0
&& (name[6] == 0 || name[6] == '.'))
|| (strncmp (name, ".sbss", 5) == 0
&& (name[5] == 0 || name[5] == '.'))))
{
(*_bfd_error_handler)
(_("%B: the target (%s) of a %s relocation is "
"in the wrong output section (%s)"),
input_bfd,
sym_name,
howto->name,
name);
}
sh = htab->sdata[0].sym;
addend -= (sh->root.u.def.value
+ sh->root.u.def.section->output_offset
+ sh->root.u.def.section->output_section->vma);
}
break;
case R_PPC_EMB_SDA2REL:
{
const char *name;
struct elf_link_hash_entry *sh;
BFD_ASSERT (sec != NULL);
name = bfd_get_section_name (abfd, sec->output_section);
if (! (strncmp (name, ".sdata2", 7) == 0
|| strncmp (name, ".sbss2", 6) == 0))
{
(*_bfd_error_handler)
(_("%B: the target (%s) of a %s relocation is "
"in the wrong output section (%s)"),
input_bfd,
sym_name,
howto->name,
name);
bfd_set_error (bfd_error_bad_value);
ret = FALSE;
continue;
}
sh = htab->sdata[1].sym;
addend -= (sh->root.u.def.value
+ sh->root.u.def.section->output_offset
+ sh->root.u.def.section->output_section->vma);
}
break;
case R_PPC_EMB_SDA21:
case R_PPC_EMB_RELSDA:
{
const char *name;
int reg;
struct elf_link_hash_entry *sh;
BFD_ASSERT (sec != NULL);
name = bfd_get_section_name (abfd, sec->output_section);
if (((strncmp (name, ".sdata", 6) == 0
&& (name[6] == 0 || name[6] == '.'))
|| (strncmp (name, ".sbss", 5) == 0
&& (name[5] == 0 || name[5] == '.'))))
{
reg = 13;
sh = htab->sdata[0].sym;
addend -= (sh->root.u.def.value
+ sh->root.u.def.section->output_offset
+ sh->root.u.def.section->output_section->vma);
}
else if (strncmp (name, ".sdata2", 7) == 0
|| strncmp (name, ".sbss2", 6) == 0)
{
reg = 2;
sh = htab->sdata[1].sym;
addend -= (sh->root.u.def.value
+ sh->root.u.def.section->output_offset
+ sh->root.u.def.section->output_section->vma);
}
else if (strcmp (name, ".PPC.EMB.sdata0") == 0
|| strcmp (name, ".PPC.EMB.sbss0") == 0)
{
reg = 0;
}
else
{
(*_bfd_error_handler)
(_("%B: the target (%s) of a %s relocation is "
"in the wrong output section (%s)"),
input_bfd,
sym_name,
howto->name,
name);
bfd_set_error (bfd_error_bad_value);
ret = FALSE;
continue;
}
if (r_type == R_PPC_EMB_SDA21)
{
insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
}
}
break;
case R_PPC_SECTOFF:
case R_PPC_SECTOFF_LO:
case R_PPC_SECTOFF_HI:
case R_PPC_SECTOFF_HA:
BFD_ASSERT (sec != NULL);
addend -= sec->output_section->vma;
break;
case R_PPC_EMB_NADDR32:
case R_PPC_EMB_NADDR16:
case R_PPC_EMB_NADDR16_LO:
case R_PPC_EMB_NADDR16_HI:
case R_PPC_EMB_NADDR16_HA:
addend -= 2 * relocation;
break;
case R_PPC_COPY:
case R_PPC_GLOB_DAT:
case R_PPC_JMP_SLOT:
case R_PPC_RELATIVE:
case R_PPC_PLT32:
case R_PPC_PLTREL32:
case R_PPC_PLT16_LO:
case R_PPC_PLT16_HI:
case R_PPC_PLT16_HA:
case R_PPC_ADDR30:
case R_PPC_EMB_RELSEC16:
case R_PPC_EMB_RELST_LO:
case R_PPC_EMB_RELST_HI:
case R_PPC_EMB_RELST_HA:
case R_PPC_EMB_BIT_FLD:
(*_bfd_error_handler)
(_("%B: relocation %s is not yet supported for symbol %s."),
input_bfd,
howto->name,
sym_name);
bfd_set_error (bfd_error_invalid_operation);
ret = FALSE;
continue;
}
switch (r_type)
{
default:
break;
case R_PPC_ADDR16_HA:
case R_PPC_REL16_HA:
case R_PPC_GOT16_HA:
case R_PPC_PLT16_HA:
case R_PPC_SECTOFF_HA:
case R_PPC_TPREL16_HA:
case R_PPC_DTPREL16_HA:
case R_PPC_GOT_TLSGD16_HA:
case R_PPC_GOT_TLSLD16_HA:
case R_PPC_GOT_TPREL16_HA:
case R_PPC_GOT_DTPREL16_HA:
case R_PPC_EMB_NADDR16_HA:
case R_PPC_EMB_RELST_HA:
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;
}
#ifdef DEBUG
fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
"offset = %ld, addend = %ld\n",
howto->name,
(int) r_type,
sym_name,
r_symndx,
(long) rel->r_offset,
(long) addend);
#endif
if (unresolved_reloc
&& !((input_section->flags & SEC_DEBUGGING) != 0
&& h->def_dynamic))
{
(*_bfd_error_handler)
(_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
input_bfd,
input_section,
(long) rel->r_offset,
howto->name,
sym_name);
ret = FALSE;
}
r = _bfd_final_link_relocate (howto,
input_bfd,
input_section,
contents,
rel->r_offset,
relocation,
addend);
if (r != bfd_reloc_ok)
{
if (r == bfd_reloc_overflow)
{
if (warned)
continue;
if (h != NULL
&& h->root.type == bfd_link_hash_undefweak
&& howto->pc_relative)
{
detect 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->root : NULL),
sym_name,
howto->name,
rel->r_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, howto->name, sym_name, (int) r);
ret = FALSE;
}
}
}
#ifdef DEBUG
fprintf (stderr, "\n");
#endif
return ret;
}
#define PPC_LO(v) ((v) & 0xffff)
#define PPC_HI(v) (((v) >> 16) & 0xffff)
#define PPC_HA(v) PPC_HI ((v) + 0x8000)
dynamic sections here. */
static bfd_boolean
ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
struct bfd_link_info *info,
struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym)
{
struct ppc_elf_link_hash_table *htab;
struct plt_entry *ent;
bfd_boolean doneone;
#ifdef DEBUG
fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
h->root.root.string);
#endif
htab = ppc_elf_hash_table (info);
BFD_ASSERT (htab->elf.dynobj != NULL);
doneone = FALSE;
for (ent = h->plt.plist; ent != NULL; ent = ent->next)
if (ent->plt.offset != (bfd_vma) -1)
{
if (!doneone)
{
Elf_Internal_Rela rela;
bfd_byte *loc;
bfd_vma reloc_index;
if (htab->plt_type == PLT_NEW)
reloc_index = ent->plt.offset / 4;
else
{
reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
/ htab->plt_slot_size);
if (reloc_index > PLT_NUM_SINGLE_ENTRIES
&& htab->plt_type == PLT_OLD)
reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
}
Set it up. */
if (htab->plt_type == PLT_VXWORKS)
{
bfd_vma got_offset;
const bfd_vma *plt_entry;
got_offset = (reloc_index + 3) * 4;
plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
: ppc_elf_vxworks_plt_entry;
if (info->shared)
{
bfd_vma got_offset_hi = (got_offset >> 16)
+ ((got_offset & 0x8000) >> 15);
bfd_put_32 (output_bfd,
plt_entry[0] | (got_offset_hi & 0xffff),
htab->plt->contents + ent->plt.offset + 0);
bfd_put_32 (output_bfd,
plt_entry[1] | (got_offset & 0xffff),
htab->plt->contents + ent->plt.offset + 4);
}
else
{
bfd_vma got_loc
= (got_offset
+ htab->elf.hgot->root.u.def.value
+ htab->elf.hgot->root.u.def.section->output_offset
+ htab->elf.hgot->root.u.def.section->output_section->vma);
bfd_vma got_loc_hi = (got_loc >> 16)
+ ((got_loc & 0x8000) >> 15);
bfd_put_32 (output_bfd,
plt_entry[0] | (got_loc_hi & 0xffff),
htab->plt->contents + ent->plt.offset + 0);
bfd_put_32 (output_bfd,
plt_entry[1] | (got_loc & 0xffff),
htab->plt->contents + ent->plt.offset + 4);
}
bfd_put_32 (output_bfd, plt_entry[2],
htab->plt->contents + ent->plt.offset + 8);
bfd_put_32 (output_bfd, plt_entry[3],
htab->plt->contents + ent->plt.offset + 12);
the byte offset of the R_PPC_JMP_SLOT relocation from the
start of the .rela.plt section. The value is stored in the
low-order 16 bits of the load instruction. */
prescaled offset. */
bfd_put_32 (output_bfd,
plt_entry[4] | reloc_index,
htab->plt->contents + ent->plt.offset + 16);
the start of the PLT section. The address of this branch
instruction is 20 bytes beyond the start of this PLT entry.
The address is encoded in bits 6-29, inclusive. The value
stored is right-shifted by two bits, permitting a 26-bit
offset. */
bfd_put_32 (output_bfd,
(plt_entry[5]
| (-(ent->plt.offset + 20) & 0x03fffffc)),
htab->plt->contents + ent->plt.offset + 20);
bfd_put_32 (output_bfd, plt_entry[6],
htab->plt->contents + ent->plt.offset + 24);
bfd_put_32 (output_bfd, plt_entry[7],
htab->plt->contents + ent->plt.offset + 28);
the address immediately after the the "bctr" instruction
in this PLT entry. */
bfd_put_32 (output_bfd, (htab->plt->output_section->vma
+ htab->plt->output_offset
+ ent->plt.offset + 16),
htab->sgotplt->contents + got_offset);
if (!info->shared)
{
loc = htab->srelplt2->contents
+ ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
* VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
* sizeof (Elf32_External_Rela));
rela.r_offset = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ ent->plt.offset + 2);
rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
R_PPC_ADDR16_HA);
rela.r_addend = got_offset;
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
loc += sizeof (Elf32_External_Rela);
rela.r_offset = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ ent->plt.offset + 6);
rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
R_PPC_ADDR16_LO);
rela.r_addend = got_offset;
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
loc += sizeof (Elf32_External_Rela);
PLT slot. Point it at the middle of the .plt entry. */
rela.r_offset = (htab->sgotplt->output_section->vma
+ htab->sgotplt->output_offset
+ got_offset);
rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
R_PPC_ADDR32);
rela.r_addend = ent->plt.offset + 16;
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
}
In particular, the offset for the relocation is not the
address of the PLT entry for this function, as specified
by the ABI. Instead, the offset is set to the address of
the GOT slot for this function. See EABI 4.4.4.1. */
rela.r_offset = (htab->sgotplt->output_section->vma
+ htab->sgotplt->output_offset
+ got_offset);
}
else
{
rela.r_offset = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ ent->plt.offset);
if (htab->plt_type == PLT_OLD)
{
linker will fill it in. */
}
else
{
bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
+ htab->glink->output_section->vma
+ htab->glink->output_offset);
bfd_put_32 (output_bfd, val,
htab->plt->contents + ent->plt.offset);
}
}
rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
rela.r_addend = 0;
loc = (htab->relplt->contents
+ reloc_index * sizeof (Elf32_External_Rela));
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
if (!h->def_regular)
{
the .plt section. Leave the value alone. */
sym->st_shndx = SHN_UNDEF;
Otherwise, the PLT entry would provide a definition for
the symbol even if the symbol wasn't defined anywhere,
and so the symbol would never be NULL. */
if (!h->ref_regular_nonweak)
sym->st_value = 0;
}
doneone = TRUE;
}
if (htab->plt_type == PLT_NEW)
{
bfd_vma plt;
unsigned char *p;
plt = (ent->plt.offset
+ htab->plt->output_section->vma
+ htab->plt->output_offset);
p = (unsigned char *) htab->glink->contents + ent->glink_offset;
if (info->shared || info->pie)
{
bfd_vma got = 0;
if (ent->addend >= 32768)
got = (ent->addend
+ ent->sec->output_section->vma
+ ent->sec->output_offset);
else if (htab->elf.hgot != NULL)
got = (htab->elf.hgot->root.u.def.value
+ htab->elf.hgot->root.u.def.section->output_section->vma
+ htab->elf.hgot->root.u.def.section->output_offset);
plt -= got;
if (plt + 0x8000 < 0x10000)
{
bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
p += 4;
bfd_put_32 (output_bfd, MTCTR_11, p);
p += 4;
bfd_put_32 (output_bfd, BCTR, p);
p += 4;
bfd_put_32 (output_bfd, NOP, p);
p += 4;
}
else
{
bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
p += 4;
bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
p += 4;
bfd_put_32 (output_bfd, MTCTR_11, p);
p += 4;
bfd_put_32 (output_bfd, BCTR, p);
p += 4;
}
}
else
{
bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
p += 4;
bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
p += 4;
bfd_put_32 (output_bfd, MTCTR_11, p);
p += 4;
bfd_put_32 (output_bfd, BCTR, p);
p += 4;
break;
}
}
else
break;
}
if (h->needs_copy)
{
asection *s;
Elf_Internal_Rela rela;
bfd_byte *loc;
#ifdef DEBUG
fprintf (stderr, ", copy");
#endif
BFD_ASSERT (h->dynindx != -1);
if (ppc_elf_hash_entry (h)->has_sda_refs)
s = htab->relsbss;
else
s = htab->relbss;
BFD_ASSERT (s != NULL);
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 = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
rela.r_addend = 0;
loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
}
#ifdef DEBUG
fprintf (stderr, "\n");
#endif
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|| (!htab->is_vxworks
&& (h == htab->elf.hgot
|| strcmp (h->root.root.string,
"_PROCEDURE_LINKAGE_TABLE_") == 0)))
sym->st_shndx = SHN_ABS;
return TRUE;
}
static enum elf_reloc_type_class
ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
{
switch (ELF32_R_TYPE (rela->r_info))
{
case R_PPC_RELATIVE:
return reloc_class_relative;
case R_PPC_REL24:
case R_PPC_ADDR24:
case R_PPC_JMP_SLOT:
return reloc_class_plt;
case R_PPC_COPY:
return reloc_class_copy;
default:
return reloc_class_normal;
}
}
static bfd_boolean
ppc_elf_finish_dynamic_sections (bfd *output_bfd,
struct bfd_link_info *info)
{
asection *sdyn;
asection *splt;
struct ppc_elf_link_hash_table *htab;
bfd_vma got;
bfd * dynobj;
#ifdef DEBUG
fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
#endif
htab = ppc_elf_hash_table (info);
dynobj = elf_hash_table (info)->dynobj;
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
if (htab->is_vxworks)
splt = bfd_get_section_by_name (dynobj, ".plt");
else
splt = NULL;
got = 0;
if (htab->elf.hgot != NULL)
got = (htab->elf.hgot->root.u.def.value
+ htab->elf.hgot->root.u.def.section->output_section->vma
+ htab->elf.hgot->root.u.def.section->output_offset);
if (htab->elf.dynamic_sections_created)
{
Elf32_External_Dyn *dyncon, *dynconend;
BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
dyncon = (Elf32_External_Dyn *) sdyn->contents;
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
asection *s;
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
switch (dyn.d_tag)
{
case DT_PLTGOT:
if (htab->is_vxworks)
s = htab->sgotplt;
else
s = htab->plt;
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_JMPREL:
s = htab->relplt;
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
break;
case DT_PPC_GOT:
dyn.d_un.d_ptr = got;
break;
case DT_RELASZ:
if (htab->is_vxworks)
{
if (htab->relplt)
dyn.d_un.d_ptr -= htab->relplt->size;
break;
}
continue;
default:
continue;
}
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
}
}
easily find the address of the _GLOBAL_OFFSET_TABLE_. */
if (htab->got != NULL)
{
unsigned char *p = htab->got->contents;
bfd_vma val;
p += htab->elf.hgot->root.u.def.value;
if (htab->plt_type == PLT_OLD)
bfd_put_32 (output_bfd, 0x4e800021 , p - 4);
val = 0;
if (sdyn != NULL)
val = sdyn->output_section->vma + sdyn->output_offset;
bfd_put_32 (output_bfd, val, p);
elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
}
if (splt && splt->size > 0)
{
static const bfd_vma *plt_entry = NULL;
plt_entry = info->shared ?
ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
if (!info->shared)
{
bfd_vma got_value =
(htab->elf.hgot->root.u.def.section->output_section->vma
+ htab->elf.hgot->root.u.def.section->output_offset
+ htab->elf.hgot->root.u.def.value);
bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
splt->contents + 0);
bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
splt->contents + 4);
}
else
{
bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
}
bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
if (! info->shared)
{
Elf_Internal_Rela rela;
bfd_byte *loc;
loc = htab->srelplt2->contents;
rela.r_offset = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ 2);
rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
rela.r_addend = 0;
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
loc += sizeof (Elf32_External_Rela);
rela.r_offset = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ 6);
rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
rela.r_addend = 0;
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
loc += sizeof (Elf32_External_Rela);
symbol index for _G_O_T_ or _P_L_T_ depending on the order
in which symbols were output. */
while (loc < htab->srelplt2->contents + htab->srelplt2->size)
{
Elf_Internal_Rela rel;
bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
loc += sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
loc += sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
loc += sizeof (Elf32_External_Rela);
}
}
}
if (htab->glink != NULL && htab->glink->contents != NULL)
{
unsigned char *p;
unsigned char *endp;
bfd_vma res0;
unsigned int i;
* PIC glink code is the following:
*
* # ith PLT code stub.
* addis 11,30,(plt+(i-1)*4-got)@ha
* lwz 11,(plt+(i-1)*4-got)@l(11)
* mtctr 11
* bctr
*
* # A table of branches, one for each plt entry.
* # The idea is that the plt call stub loads ctr (and r11) with these
* # addresses, so (r11 - res_0) gives the plt index * 4.
* res_0: b PLTresolve
* res_1: b PLTresolve
* .
* # Some number of entries towards the end can be nops
* res_n_m3: nop
* res_n_m2: nop
* res_n_m1:
*
* PLTresolve:
* addis 11,11,(1f-res_0)@ha
* mflr 0
* bcl 20,31,1f
* 1: addi 11,11,(1b-res_0)@l
* mflr 12
* mtlr 0
* sub 11,11,12 # r11 = index * 4
* addis 12,12,(got+4-1b)@ha
* lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
* lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
* mtctr 0
* add 0,11,11
* add 11,0,11 # r11 = index * 12 = reloc offset.
* bctr
*/
static const unsigned int pic_plt_resolve[] =
{
ADDIS_11_11,
MFLR_0,
BCL_20_31,
ADDI_11_11,
MFLR_12,
MTLR_0,
SUB_11_11_12,
ADDIS_12_12,
LWZ_0_12,
LWZ_12_12,
MTCTR_0,
ADD_0_11_11,
ADD_11_0_11,
BCTR,
NOP,
NOP
};
static const unsigned int plt_resolve[] =
{
LIS_12,
ADDIS_11_11,
LWZ_0_12,
ADDI_11_11,
MTCTR_0,
ADD_0_11_11,
LWZ_12_12,
ADD_11_0_11,
BCTR,
NOP,
NOP,
NOP,
NOP,
NOP,
NOP,
NOP
};
if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
abort ();
if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
abort ();
and perhaps some padding. */
p = htab->glink->contents;
p += htab->glink_pltresolve;
endp = htab->glink->contents;
endp += htab->glink->size - GLINK_PLTRESOLVE;
while (p < endp - 8 * 4)
{
bfd_put_32 (output_bfd, B + endp - p, p);
p += 4;
}
while (p < endp)
{
bfd_put_32 (output_bfd, NOP, p);
p += 4;
}
res0 = (htab->glink_pltresolve
+ htab->glink->output_section->vma
+ htab->glink->output_offset);
if (info->shared || info->pie)
{
bfd_vma bcl;
for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
{
bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
p += 4;
}
p -= 4 * ARRAY_SIZE (pic_plt_resolve);
bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
+ htab->glink->output_section->vma
+ htab->glink->output_offset);
bfd_put_32 (output_bfd,
ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
bfd_put_32 (output_bfd,
ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
bfd_put_32 (output_bfd,
ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
{
bfd_put_32 (output_bfd,
LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
bfd_put_32 (output_bfd,
LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
}
else
{
bfd_put_32 (output_bfd,
LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
bfd_put_32 (output_bfd,
LWZ_12_12 + 4, p + 9*4);
}
}
else
{
for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
{
bfd_put_32 (output_bfd, plt_resolve[i], p);
p += 4;
}
p -= 4 * ARRAY_SIZE (plt_resolve);
bfd_put_32 (output_bfd,
LIS_12 + PPC_HA (got + 4), p + 0*4);
bfd_put_32 (output_bfd,
ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
bfd_put_32 (output_bfd,
ADDI_11_11 + PPC_LO (-res0), p + 3*4);
if (PPC_HA (got + 4) == PPC_HA (got + 8))
{
bfd_put_32 (output_bfd,
LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
bfd_put_32 (output_bfd,
LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
}
else
{
bfd_put_32 (output_bfd,
LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
bfd_put_32 (output_bfd,
LWZ_12_12 + 4, p + 6*4);
}
}
}
return TRUE;
}
#define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
#define TARGET_LITTLE_NAME "elf32-powerpcle"
#define TARGET_BIG_SYM bfd_elf32_powerpc_vec
#define TARGET_BIG_NAME "elf32-powerpc"
#define ELF_ARCH bfd_arch_powerpc
#define ELF_MACHINE_CODE EM_PPC
#if defined(__QNXTARGET__) || defined(__HAIKU_TARGET__)
#define ELF_MAXPAGESIZE 0x1000
#else
#define ELF_MAXPAGESIZE 0x10000
#endif
#define ELF_MINPAGESIZE 0x1000
#define elf_info_to_howto ppc_elf_info_to_howto
#ifdef EM_CYGNUS_POWERPC
#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
#endif
#ifdef EM_PPC_OLD
#define ELF_MACHINE_ALT2 EM_PPC_OLD
#endif
#define elf_backend_plt_not_loaded 1
#define elf_backend_can_gc_sections 1
#define elf_backend_can_refcount 1
#define elf_backend_rela_normal 1
#define bfd_elf32_mkobject ppc_elf_mkobject
#define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
#define bfd_elf32_bfd_relax_section ppc_elf_relax_section
#define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
#define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
#define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
#define elf_backend_object_p ppc_elf_object_p
#define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
#define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
#define elf_backend_section_from_shdr ppc_elf_section_from_shdr
#define elf_backend_relocate_section ppc_elf_relocate_section
#define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
#define elf_backend_check_relocs ppc_elf_check_relocs
#define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
#define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
#define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
#define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
#define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
#define elf_backend_fake_sections ppc_elf_fake_sections
#define elf_backend_additional_program_headers ppc_elf_additional_program_headers
#define elf_backend_grok_prstatus ppc_elf_grok_prstatus
#define elf_backend_grok_psinfo ppc_elf_grok_psinfo
#define elf_backend_reloc_type_class ppc_elf_reloc_type_class
#define elf_backend_begin_write_processing ppc_elf_begin_write_processing
#define elf_backend_final_write_processing ppc_elf_final_write_processing
#define elf_backend_write_section ppc_elf_write_section
#define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
#define elf_backend_plt_sym_val ppc_elf_plt_sym_val
#define elf_backend_action_discarded ppc_elf_action_discarded
#include "elf32-target.h"
#undef TARGET_LITTLE_SYM
#undef TARGET_LITTLE_NAME
#undef TARGET_BIG_SYM
#define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
#undef TARGET_BIG_NAME
#define TARGET_BIG_NAME "elf32-powerpc-vxworks"
static const struct bfd_elf_special_section *
ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
{
if (sec->name == NULL)
return NULL;
if (strcmp (sec->name, ".plt") == 0)
return _bfd_elf_get_sec_type_attr (abfd, sec);
return ppc_elf_get_sec_type_attr (abfd, sec);
}
appropriately for VxWorks. */
static struct bfd_link_hash_table *
ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
{
struct bfd_link_hash_table *ret;
ret = ppc_elf_link_hash_table_create (abfd);
if (ret)
{
struct ppc_elf_link_hash_table *htab
= (struct ppc_elf_link_hash_table *)ret;
htab->is_vxworks = 1;
htab->plt_type = PLT_VXWORKS;
htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
}
return ret;
}
static bfd_boolean
ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
struct bfd_link_info *info,
Elf_Internal_Sym *sym,
const char **namep ATTRIBUTE_UNUSED,
flagword *flagsp ATTRIBUTE_UNUSED,
asection **secp,
bfd_vma *valp)
{
if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
valp))
return FALSE;
return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
}
static void
ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
{
ppc_elf_final_write_processing(abfd, linker);
elf_vxworks_final_write_processing(abfd, linker);
}
define it. */
#undef elf_backend_want_plt_sym
#define elf_backend_want_plt_sym 1
#undef elf_backend_want_got_plt
#define elf_backend_want_got_plt 1
#undef elf_backend_got_symbol_offset
#define elf_backend_got_symbol_offset 0
#undef elf_backend_plt_not_loaded
#define elf_backend_plt_not_loaded 0
#undef elf_backend_plt_readonly
#define elf_backend_plt_readonly 1
#undef elf_backend_got_header_size
#define elf_backend_got_header_size 12
#undef bfd_elf32_bfd_link_hash_table_create
#define bfd_elf32_bfd_link_hash_table_create \
ppc_elf_vxworks_link_hash_table_create
#undef elf_backend_add_symbol_hook
#define elf_backend_add_symbol_hook \
ppc_elf_vxworks_add_symbol_hook
#undef elf_backend_link_output_symbol_hook
#define elf_backend_link_output_symbol_hook \
elf_vxworks_link_output_symbol_hook
#undef elf_backend_final_write_processing
#define elf_backend_final_write_processing \
ppc_elf_vxworks_final_write_processing
#undef elf_backend_get_sec_type_attr
#define elf_backend_get_sec_type_attr \
ppc_elf_vxworks_get_sec_type_attr
#undef elf_backend_emit_relocs
#define elf_backend_emit_relocs \
elf_vxworks_emit_relocs
#undef elf32_bed
#define elf32_bed ppc_elf_vxworks_bed
#include "elf32-target.h"
