Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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 3 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. */
#include "sysdep.h"
#include "bfd.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf-vxworks.h"
#include "bfd_stdint.h"
#define USE_REL 1
#include "elf/i386.h"
static reloc_howto_type elf_howto_table[]=
{
HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_NONE",
TRUE, 0x00000000, 0x00000000, FALSE),
HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_32",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_PC32",
TRUE, 0xffffffff, 0xffffffff, TRUE),
HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_GOT32",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_PLT32",
TRUE, 0xffffffff, 0xffffffff, TRUE),
HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_COPY",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_GLOB_DAT",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_RELATIVE",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_GOTOFF",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_GOTPC",
TRUE, 0xffffffff, 0xffffffff, TRUE),
R_386_standard counts the number up to this point, and
R_386_ext_offset is the value to subtract from a reloc type of
R_386_16 thru R_386_PC8 to form an index into this table. */
#define R_386_standard (R_386_GOTPC + 1)
#define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_IE",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_LE",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_GD",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_LDM",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_16",
TRUE, 0xffff, 0xffff, FALSE),
HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_PC16",
TRUE, 0xffff, 0xffff, TRUE),
HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_8",
TRUE, 0xff, 0xff, FALSE),
HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
bfd_elf_generic_reloc, "R_386_PC8",
TRUE, 0xff, 0xff, TRUE),
#define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
#define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_IE_32",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_LE_32",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
TRUE, 0xffffffff, 0xffffffff, FALSE),
EMPTY_HOWTO (38),
HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
TRUE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
FALSE, 0, 0, FALSE),
HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_386_TLS_DESC",
TRUE, 0xffffffff, 0xffffffff, FALSE),
#define R_386_tls (R_386_TLS_DESC + 1 - R_386_tls_offset)
#define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
HOWTO (R_386_GNU_VTINHERIT,
0,
2,
0,
FALSE,
0,
complain_overflow_dont,
NULL,
"R_386_GNU_VTINHERIT",
FALSE,
0,
0,
FALSE),
HOWTO (R_386_GNU_VTENTRY,
0,
2,
0,
FALSE,
0,
complain_overflow_dont,
_bfd_elf_rel_vtable_reloc_fn,
"R_386_GNU_VTENTRY",
FALSE,
0,
0,
FALSE)
#define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
};
#ifdef DEBUG_GEN_RELOC
#define TRACE(str) \
fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
#else
#define TRACE(str)
#endif
static reloc_howto_type *
elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
switch (code)
{
case BFD_RELOC_NONE:
TRACE ("BFD_RELOC_NONE");
return &elf_howto_table[R_386_NONE];
case BFD_RELOC_32:
TRACE ("BFD_RELOC_32");
return &elf_howto_table[R_386_32];
case BFD_RELOC_CTOR:
TRACE ("BFD_RELOC_CTOR");
return &elf_howto_table[R_386_32];
case BFD_RELOC_32_PCREL:
TRACE ("BFD_RELOC_PC32");
return &elf_howto_table[R_386_PC32];
case BFD_RELOC_386_GOT32:
TRACE ("BFD_RELOC_386_GOT32");
return &elf_howto_table[R_386_GOT32];
case BFD_RELOC_386_PLT32:
TRACE ("BFD_RELOC_386_PLT32");
return &elf_howto_table[R_386_PLT32];
case BFD_RELOC_386_COPY:
TRACE ("BFD_RELOC_386_COPY");
return &elf_howto_table[R_386_COPY];
case BFD_RELOC_386_GLOB_DAT:
TRACE ("BFD_RELOC_386_GLOB_DAT");
return &elf_howto_table[R_386_GLOB_DAT];
case BFD_RELOC_386_JUMP_SLOT:
TRACE ("BFD_RELOC_386_JUMP_SLOT");
return &elf_howto_table[R_386_JUMP_SLOT];
case BFD_RELOC_386_RELATIVE:
TRACE ("BFD_RELOC_386_RELATIVE");
return &elf_howto_table[R_386_RELATIVE];
case BFD_RELOC_386_GOTOFF:
TRACE ("BFD_RELOC_386_GOTOFF");
return &elf_howto_table[R_386_GOTOFF];
case BFD_RELOC_386_GOTPC:
TRACE ("BFD_RELOC_386_GOTPC");
return &elf_howto_table[R_386_GOTPC];
case BFD_RELOC_386_TLS_TPOFF:
TRACE ("BFD_RELOC_386_TLS_TPOFF");
return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
case BFD_RELOC_386_TLS_IE:
TRACE ("BFD_RELOC_386_TLS_IE");
return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
case BFD_RELOC_386_TLS_GOTIE:
TRACE ("BFD_RELOC_386_TLS_GOTIE");
return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
case BFD_RELOC_386_TLS_LE:
TRACE ("BFD_RELOC_386_TLS_LE");
return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
case BFD_RELOC_386_TLS_GD:
TRACE ("BFD_RELOC_386_TLS_GD");
return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
case BFD_RELOC_386_TLS_LDM:
TRACE ("BFD_RELOC_386_TLS_LDM");
return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
case BFD_RELOC_16:
TRACE ("BFD_RELOC_16");
return &elf_howto_table[R_386_16 - R_386_ext_offset];
case BFD_RELOC_16_PCREL:
TRACE ("BFD_RELOC_16_PCREL");
return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
case BFD_RELOC_8:
TRACE ("BFD_RELOC_8");
return &elf_howto_table[R_386_8 - R_386_ext_offset];
case BFD_RELOC_8_PCREL:
TRACE ("BFD_RELOC_8_PCREL");
return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
case BFD_RELOC_386_TLS_LDO_32:
TRACE ("BFD_RELOC_386_TLS_LDO_32");
return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
case BFD_RELOC_386_TLS_IE_32:
TRACE ("BFD_RELOC_386_TLS_IE_32");
return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
case BFD_RELOC_386_TLS_LE_32:
TRACE ("BFD_RELOC_386_TLS_LE_32");
return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
case BFD_RELOC_386_TLS_DTPMOD32:
TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
case BFD_RELOC_386_TLS_DTPOFF32:
TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
case BFD_RELOC_386_TLS_TPOFF32:
TRACE ("BFD_RELOC_386_TLS_TPOFF32");
return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
case BFD_RELOC_386_TLS_GOTDESC:
TRACE ("BFD_RELOC_386_TLS_GOTDESC");
return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
case BFD_RELOC_386_TLS_DESC_CALL:
TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
case BFD_RELOC_386_TLS_DESC:
TRACE ("BFD_RELOC_386_TLS_DESC");
return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
case BFD_RELOC_VTABLE_INHERIT:
TRACE ("BFD_RELOC_VTABLE_INHERIT");
return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
case BFD_RELOC_VTABLE_ENTRY:
TRACE ("BFD_RELOC_VTABLE_ENTRY");
return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
default:
break;
}
TRACE ("Unknown");
return 0;
}
static reloc_howto_type *
elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
const char *r_name)
{
unsigned int i;
for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
if (elf_howto_table[i].name != NULL
&& strcasecmp (elf_howto_table[i].name, r_name) == 0)
return &elf_howto_table[i];
return NULL;
}
static reloc_howto_type *
elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
{
unsigned int indx;
if ((indx = r_type) >= R_386_standard
&& ((indx = r_type - R_386_ext_offset) - R_386_standard
>= R_386_ext - R_386_standard)
&& ((indx = r_type - R_386_tls_offset) - R_386_ext
>= R_386_tls - R_386_ext)
&& ((indx = r_type - R_386_vt_offset) - R_386_tls
>= R_386_vt - R_386_tls))
{
(*_bfd_error_handler) (_("%B: invalid relocation type %d"),
abfd, (int) r_type);
indx = R_386_NONE;
}
BFD_ASSERT (elf_howto_table [indx].type == r_type);
return &elf_howto_table[indx];
}
static void
elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
}
2.1 cc generates temporary symbols that start with .X, so we
recognize them here. FIXME: do other SVR4 compilers also use .X?.
If so, we should move the .X recognition into
_bfd_elf_is_local_label_name. */
static bfd_boolean
elf_i386_is_local_label_name (bfd *abfd, const char *name)
{
if (name[0] == '.' && name[1] == 'X')
return TRUE;
return _bfd_elf_is_local_label_name (abfd, name);
}
static bfd_boolean
elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
{
int offset;
size_t size;
if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
{
int pr_version = bfd_get_32 (abfd, note->descdata);
if (pr_version != 1)
return FALSE;
elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
offset = 28;
size = bfd_get_32 (abfd, note->descdata + 8);
}
else
{
switch (note->descsz)
{
default:
return FALSE;
case 144:
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 = 68;
break;
}
}
return _bfd_elfcore_make_pseudosection (abfd, ".reg",
size, note->descpos + offset);
}
static bfd_boolean
elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
{
if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
{
int pr_version = bfd_get_32 (abfd, note->descdata);
if (pr_version != 1)
return FALSE;
elf_tdata (abfd)->core_program
= _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
elf_tdata (abfd)->core_command
= _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
}
else
{
switch (note->descsz)
{
default:
return FALSE;
case 124:
elf_tdata (abfd)->core_program
= _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
elf_tdata (abfd)->core_command
= _bfd_elfcore_strndup (abfd, note->descdata + 44, 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;
}
In order to gain some understanding of code in this file without
knowing all the intricate details of the linker, note the
following:
Functions named elf_i386_* are called by external routines, other
functions are only called locally. elf_i386_* functions appear
in this file more or less in the order in which they are called
from external routines. eg. elf_i386_check_relocs is called
early in the link process, elf_i386_finish_dynamic_sections is
one of the last functions. */
section. */
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
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
#define PLT_ENTRY_SIZE 16
this. See the SVR4 ABI i386 supplement to see how this works.
Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
static const bfd_byte elf_i386_plt0_entry[12] =
{
0xff, 0x35,
0, 0, 0, 0,
0xff, 0x25,
0, 0, 0, 0
};
this. */
static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
{
0xff, 0x25,
0, 0, 0, 0,
0x68,
0, 0, 0, 0,
0xe9,
0, 0, 0, 0
};
Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
static const bfd_byte elf_i386_pic_plt0_entry[12] =
{
0xff, 0xb3, 4, 0, 0, 0,
0xff, 0xa3, 8, 0, 0, 0
};
static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
{
0xff, 0xa3,
0, 0, 0, 0,
0x68,
0, 0, 0, 0,
0xe9,
0, 0, 0, 0
};
for the PLTResolve stub and then for each PLT entry. */
#define PLTRESOLVE_RELOCS_SHLIB 0
#define PLTRESOLVE_RELOCS 2
#define PLT_NON_JUMP_SLOT_RELOCS 2
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 elf_i386_dyn_relocs
{
struct elf_i386_dyn_relocs *next;
asection *sec;
bfd_size_type count;
bfd_size_type pc_count;
};
struct elf_i386_link_hash_entry
{
struct elf_link_hash_entry elf;
struct elf_i386_dyn_relocs *dyn_relocs;
#define GOT_UNKNOWN 0
#define GOT_NORMAL 1
#define GOT_TLS_GD 2
#define GOT_TLS_IE 4
#define GOT_TLS_IE_POS 5
#define GOT_TLS_IE_NEG 6
#define GOT_TLS_IE_BOTH 7
#define GOT_TLS_GDESC 8
#define GOT_TLS_GD_BOTH_P(type) \
((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
#define GOT_TLS_GD_P(type) \
((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
#define GOT_TLS_GDESC_P(type) \
((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
#define GOT_TLS_GD_ANY_P(type) \
(GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
unsigned char tls_type;
starting at the end of the jump table. */
bfd_vma tlsdesc_got;
};
#define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
struct elf_i386_obj_tdata
{
struct elf_obj_tdata root;
char *local_got_tls_type;
bfd_vma *local_tlsdesc_gotent;
};
#define elf_i386_tdata(abfd) \
((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
#define elf_i386_local_got_tls_type(abfd) \
(elf_i386_tdata (abfd)->local_got_tls_type)
#define elf_i386_local_tlsdesc_gotent(abfd) \
(elf_i386_tdata (abfd)->local_tlsdesc_gotent)
#define is_i386_elf(bfd) \
(bfd_get_flavour (bfd) == bfd_target_elf_flavour \
&& elf_tdata (bfd) != NULL \
&& elf_object_id (bfd) == I386_ELF_TDATA)
static bfd_boolean
elf_i386_mkobject (bfd *abfd)
{
return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
I386_ELF_TDATA);
}
struct elf_i386_link_hash_table
{
struct elf_link_hash_table elf;
asection *sgot;
asection *sgotplt;
asection *srelgot;
asection *splt;
asection *srelplt;
asection *sdynbss;
asection *srelbss;
asection *srelplt2;
int is_vxworks;
bfd_byte plt0_pad_byte;
bfd_vma next_tls_desc_index;
union {
bfd_signed_vma refcount;
bfd_vma offset;
} tls_ldm_got;
section, plus whatever space is used by the jump slots. */
bfd_vma sgotplt_jump_table_size;
struct sym_sec_cache sym_sec;
struct bfd_link_hash_entry *tls_module_base;
};
#define elf_i386_hash_table(p) \
((struct elf_i386_link_hash_table *) ((p)->hash))
#define elf_i386_compute_jump_table_size(htab) \
((htab)->next_tls_desc_index * 4)
static struct bfd_hash_entry *
link_hash_newfunc (struct bfd_hash_entry *entry,
struct bfd_hash_table *table,
const char *string)
{
subclass. */
if (entry == NULL)
{
entry = bfd_hash_allocate (table,
sizeof (struct elf_i386_link_hash_entry));
if (entry == NULL)
return entry;
}
entry = _bfd_elf_link_hash_newfunc (entry, table, string);
if (entry != NULL)
{
struct elf_i386_link_hash_entry *eh;
eh = (struct elf_i386_link_hash_entry *) entry;
eh->dyn_relocs = NULL;
eh->tls_type = GOT_UNKNOWN;
eh->tlsdesc_got = (bfd_vma) -1;
}
return entry;
}
static struct bfd_link_hash_table *
elf_i386_link_hash_table_create (bfd *abfd)
{
struct elf_i386_link_hash_table *ret;
bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
ret = bfd_malloc (amt);
if (ret == NULL)
return NULL;
if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
sizeof (struct elf_i386_link_hash_entry)))
{
free (ret);
return NULL;
}
ret->sgot = NULL;
ret->sgotplt = NULL;
ret->srelgot = NULL;
ret->splt = NULL;
ret->srelplt = NULL;
ret->sdynbss = NULL;
ret->srelbss = NULL;
ret->tls_ldm_got.refcount = 0;
ret->next_tls_desc_index = 0;
ret->sgotplt_jump_table_size = 0;
ret->sym_sec.abfd = NULL;
ret->is_vxworks = 0;
ret->srelplt2 = NULL;
ret->plt0_pad_byte = 0;
ret->tls_module_base = NULL;
return &ret->elf.root;
}
shortcuts to them in our hash table. */
static bfd_boolean
create_got_section (bfd *dynobj, struct bfd_link_info *info)
{
struct elf_i386_link_hash_table *htab;
if (! _bfd_elf_create_got_section (dynobj, info))
return FALSE;
htab = elf_i386_hash_table (info);
htab->sgot = bfd_get_section_by_name (dynobj, ".got");
htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
if (!htab->sgot || !htab->sgotplt)
abort ();
htab->srelgot = bfd_make_section_with_flags (dynobj, ".rel.got",
(SEC_ALLOC | SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
| SEC_READONLY));
if (htab->srelgot == NULL
|| ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
return FALSE;
return TRUE;
}
.rel.bss sections in DYNOBJ, and set up shortcuts to them in our
hash table. */
static bfd_boolean
elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
{
struct elf_i386_link_hash_table *htab;
htab = elf_i386_hash_table (info);
if (!htab->sgot && !create_got_section (dynobj, info))
return FALSE;
if (!_bfd_elf_create_dynamic_sections (dynobj, info))
return FALSE;
htab->splt = bfd_get_section_by_name (dynobj, ".plt");
htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
if (!info->shared)
htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
if (!htab->splt || !htab->srelplt || !htab->sdynbss
|| (!info->shared && !htab->srelbss))
abort ();
if (htab->is_vxworks
&& !elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
return FALSE;
return TRUE;
}
static void
elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
struct elf_link_hash_entry *dir,
struct elf_link_hash_entry *ind)
{
struct elf_i386_link_hash_entry *edir, *eind;
edir = (struct elf_i386_link_hash_entry *) dir;
eind = (struct elf_i386_link_hash_entry *) ind;
if (eind->dyn_relocs != NULL)
{
if (edir->dyn_relocs != NULL)
{
struct elf_i386_dyn_relocs **pp;
struct elf_i386_dyn_relocs *p;
list. Merge any entries against the same section. */
for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
{
struct elf_i386_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;
}
if (ind->root.type == bfd_link_hash_indirect
&& dir->got.refcount <= 0)
{
edir->tls_type = eind->tls_type;
eind->tls_type = GOT_UNKNOWN;
}
if (ELIMINATE_COPY_RELOCS
&& ind->root.type != bfd_link_hash_indirect
&& dir->dynamic_adjusted)
{
of elf_adjust_dynamic_symbol, don't copy non_got_ref.
We clear it ourselves for ELIMINATE_COPY_RELOCS. */
dir->ref_dynamic |= ind->ref_dynamic;
dir->ref_regular |= ind->ref_regular;
dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
dir->needs_plt |= ind->needs_plt;
dir->pointer_equality_needed |= ind->pointer_equality_needed;
}
else
_bfd_elf_link_hash_copy_indirect (info, dir, ind);
}
typedef union
{
unsigned char c[2];
uint16_t i;
}
i386_opcode16;
from R_TYPE. */
static bfd_boolean
elf_i386_check_tls_transition (bfd *abfd, asection *sec,
bfd_byte *contents,
Elf_Internal_Shdr *symtab_hdr,
struct elf_link_hash_entry **sym_hashes,
unsigned int r_type,
const Elf_Internal_Rela *rel,
const Elf_Internal_Rela *relend)
{
unsigned int val, type;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
bfd_vma offset;
if (contents == NULL)
{
if (elf_section_data (sec)->this_hdr.contents != NULL)
contents = elf_section_data (sec)->this_hdr.contents;
else
{
if (!bfd_malloc_and_get_section (abfd, sec, &contents))
return FALSE;
elf_section_data (sec)->this_hdr.contents = contents;
}
}
offset = rel->r_offset;
switch (r_type)
{
case R_386_TLS_GD:
case R_386_TLS_LDM:
if (offset < 2 || (rel + 1) >= relend)
return FALSE;
type = bfd_get_8 (abfd, contents + offset - 2);
if (r_type == R_386_TLS_GD)
{
leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
can transit to different access model. */
if ((offset + 10) > sec->size ||
(type != 0x8d && type != 0x04))
return FALSE;
val = bfd_get_8 (abfd, contents + offset - 1);
if (type == 0x04)
{
if (offset < 3)
return FALSE;
if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
return FALSE;
if ((val & 0xc7) != 0x05 || val == (4 << 3))
return FALSE;
}
else
{
if ((val & 0xf8) != 0x80 || (val & 7) == 4)
return FALSE;
if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
return FALSE;
}
}
else
{
leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
can transit to different access model. */
if (type != 0x8d || (offset + 9) > sec->size)
return FALSE;
val = bfd_get_8 (abfd, contents + offset - 1);
if ((val & 0xf8) != 0x80 || (val & 7) == 4)
return FALSE;
}
if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
return FALSE;
r_symndx = ELF32_R_SYM (rel[1].r_info);
if (r_symndx < symtab_hdr->sh_info)
return FALSE;
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
return (h != NULL
&& h->root.root.string != NULL
&& (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
|| ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
&& (strcmp (h->root.root.string, "___tls_get_addr") == 0));
case R_386_TLS_IE:
movl foo@indntpoff(%rip), %eax
movl foo@indntpoff(%rip), %reg
addl foo@indntpoff(%rip), %reg
*/
if (offset < 1 || (offset + 4) > sec->size)
return FALSE;
val = bfd_get_8 (abfd, contents + offset - 1);
if (val == 0xa1)
return TRUE;
if (offset < 2)
return FALSE;
type = bfd_get_8 (abfd, contents + offset - 2);
return ((type == 0x8b || type == 0x03)
&& (val & 0xc7) == 0x05);
case R_386_TLS_GOTIE:
case R_386_TLS_IE_32:
subl foo@{tpoff,gontoff}(%reg1), %reg2
movl foo@{tpoff,gontoff}(%reg1), %reg2
addl foo@{tpoff,gontoff}(%reg1), %reg2
*/
if (offset < 2 || (offset + 4) > sec->size)
return FALSE;
val = bfd_get_8 (abfd, contents + offset - 1);
if ((val & 0xc0) != 0x80 || (val & 7) == 4)
return FALSE;
type = bfd_get_8 (abfd, contents + offset - 2);
return type == 0x8b || type == 0x2b || type == 0x03;
case R_386_TLS_GOTDESC:
leal x@tlsdesc(%ebx), %eax
Make sure it's a leal adding ebx to a 32-bit offset
into any register, although it's probably almost always
going to be eax. */
if (offset < 2 || (offset + 4) > sec->size)
return FALSE;
if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
return FALSE;
val = bfd_get_8 (abfd, contents + offset - 1);
return (val & 0xc7) == 0x83;
case R_386_TLS_DESC_CALL:
call *x@tlsdesc(%rax)
*/
if (offset + 2 <= sec->size)
{
static i386_opcode16 call = { { 0xff, 0x10 } };
return bfd_get_16 (abfd, contents + offset) == call.i;
}
return FALSE;
default:
abort ();
}
}
will be performed. Update R_TYPE if there is a transition. */
static bfd_boolean
elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
asection *sec, bfd_byte *contents,
Elf_Internal_Shdr *symtab_hdr,
struct elf_link_hash_entry **sym_hashes,
unsigned int *r_type, int tls_type,
const Elf_Internal_Rela *rel,
const Elf_Internal_Rela *relend,
struct elf_link_hash_entry *h)
{
unsigned int from_type = *r_type;
unsigned int to_type = from_type;
bfd_boolean check = TRUE;
switch (from_type)
{
case R_386_TLS_GD:
case R_386_TLS_GOTDESC:
case R_386_TLS_DESC_CALL:
case R_386_TLS_IE_32:
case R_386_TLS_IE:
case R_386_TLS_GOTIE:
if (!info->shared)
{
if (h == NULL)
to_type = R_386_TLS_LE_32;
else if (from_type != R_386_TLS_IE
&& from_type != R_386_TLS_GOTIE)
to_type = R_386_TLS_IE_32;
}
isn't NULL and there may be additional transitions based on
TLS_TYPE. */
if (contents != NULL)
{
unsigned int new_to_type = to_type;
if (!info->shared
&& h != NULL
&& h->dynindx == -1
&& (tls_type & GOT_TLS_IE))
new_to_type = R_386_TLS_LE_32;
if (to_type == R_386_TLS_GD
|| to_type == R_386_TLS_GOTDESC
|| to_type == R_386_TLS_DESC_CALL)
{
if (tls_type == GOT_TLS_IE_POS)
new_to_type = R_386_TLS_GOTIE;
else if (tls_type & GOT_TLS_IE)
new_to_type = R_386_TLS_IE_32;
}
elf_i386_check_relocs. We only want to check the new
transition which hasn't been checked before. */
check = new_to_type != to_type && from_type == to_type;
to_type = new_to_type;
}
break;
case R_386_TLS_LDM:
if (!info->shared)
to_type = R_386_TLS_LE_32;
break;
default:
return TRUE;
}
if (from_type == to_type)
return TRUE;
if (check
&& ! elf_i386_check_tls_transition (abfd, sec, contents,
symtab_hdr, sym_hashes,
from_type, rel, relend))
{
reloc_howto_type *from, *to;
from = elf_i386_rtype_to_howto (abfd, from_type);
to = elf_i386_rtype_to_howto (abfd, to_type);
(*_bfd_error_handler)
(_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
"in section `%A' failed"),
abfd, sec, from->name, to->name,
h ? h->root.root.string : "a local symbol",
(unsigned long) rel->r_offset);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
*r_type = to_type;
return TRUE;
}
calculate needed space in the global offset table, procedure linkage
table, and dynamic reloc sections. */
static bfd_boolean
elf_i386_check_relocs (bfd *abfd,
struct bfd_link_info *info,
asection *sec,
const Elf_Internal_Rela *relocs)
{
struct elf_i386_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 *sreloc;
if (info->relocatable)
return TRUE;
BFD_ASSERT (is_i386_elf (abfd));
htab = elf_i386_hash_table (info);
symtab_hdr = &elf_symtab_hdr (abfd);
sym_hashes = elf_sym_hashes (abfd);
sreloc = NULL;
rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
{
unsigned int r_type;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
r_symndx = ELF32_R_SYM (rel->r_info);
r_type = ELF32_R_TYPE (rel->r_info);
if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
{
(*_bfd_error_handler) (_("%B: bad symbol index: %d"),
abfd,
r_symndx);
return FALSE;
}
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;
}
if (! elf_i386_tls_transition (info, abfd, sec, NULL,
symtab_hdr, sym_hashes,
&r_type, GOT_UNKNOWN,
rel, rel_end, h))
return FALSE;
switch (r_type)
{
case R_386_TLS_LDM:
htab->tls_ldm_got.refcount += 1;
goto create_got;
case R_386_PLT32:
actually build the entry in adjust_dynamic_symbol,
because this might be a case of linking PIC code which is
never referenced by a dynamic object, in which case we
don't need to generate a procedure linkage table entry
after all. */
creating a procedure linkage table entry. */
if (h == NULL)
continue;
h->needs_plt = 1;
h->plt.refcount += 1;
break;
case R_386_TLS_IE_32:
case R_386_TLS_IE:
case R_386_TLS_GOTIE:
if (info->shared)
info->flags |= DF_STATIC_TLS;
case R_386_GOT32:
case R_386_TLS_GD:
case R_386_TLS_GOTDESC:
case R_386_TLS_DESC_CALL:
{
int tls_type, old_tls_type;
switch (r_type)
{
default:
case R_386_GOT32: tls_type = GOT_NORMAL; break;
case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
case R_386_TLS_GOTDESC:
case R_386_TLS_DESC_CALL:
tls_type = GOT_TLS_GDESC; break;
case R_386_TLS_IE_32:
if (ELF32_R_TYPE (rel->r_info) == r_type)
tls_type = GOT_TLS_IE_NEG;
else
R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
tls_type = GOT_TLS_IE;
break;
case R_386_TLS_IE:
case R_386_TLS_GOTIE:
tls_type = GOT_TLS_IE_POS; break;
}
if (h != NULL)
{
h->got.refcount += 1;
old_tls_type = elf_i386_hash_entry(h)->tls_type;
}
else
{
bfd_signed_vma *local_got_refcounts;
local_got_refcounts = elf_local_got_refcounts (abfd);
if (local_got_refcounts == NULL)
{
bfd_size_type size;
size = symtab_hdr->sh_info;
size *= (sizeof (bfd_signed_vma)
+ sizeof (bfd_vma) + sizeof(char));
local_got_refcounts = bfd_zalloc (abfd, size);
if (local_got_refcounts == NULL)
return FALSE;
elf_local_got_refcounts (abfd) = local_got_refcounts;
elf_i386_local_tlsdesc_gotent (abfd)
= (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
elf_i386_local_got_tls_type (abfd)
= (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
}
local_got_refcounts[r_symndx] += 1;
old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
}
if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
tls_type |= old_tls_type;
there is no point to use dynamic model for it. */
else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
&& (! GOT_TLS_GD_ANY_P (old_tls_type)
|| (tls_type & GOT_TLS_IE) == 0))
{
if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
tls_type = old_tls_type;
else if (GOT_TLS_GD_ANY_P (old_tls_type)
&& GOT_TLS_GD_ANY_P (tls_type))
tls_type |= old_tls_type;
else
{
(*_bfd_error_handler)
(_("%B: `%s' accessed both as normal and "
"thread local symbol"),
abfd,
h ? h->root.root.string : "<local>");
return FALSE;
}
}
if (old_tls_type != tls_type)
{
if (h != NULL)
elf_i386_hash_entry (h)->tls_type = tls_type;
else
elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
}
}
case R_386_GOTOFF:
case R_386_GOTPC:
create_got:
if (htab->sgot == NULL)
{
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
if (!create_got_section (htab->elf.dynobj, info))
return FALSE;
}
if (r_type != R_386_TLS_IE)
break;
case R_386_TLS_LE_32:
case R_386_TLS_LE:
if (!info->shared)
break;
info->flags |= DF_STATIC_TLS;
case R_386_32:
case R_386_PC32:
if (h != NULL && !info->shared)
{
need a copy reloc. We can't check reliably at this
stage whether the section is read-only, as input
sections have not yet been mapped to output sections.
Tentatively set the flag for now, and correct in
adjust_dynamic_symbol. */
h->non_got_ref = 1;
refers to is in a shared lib. */
h->plt.refcount += 1;
if (r_type != R_386_PC32)
h->pointer_equality_needed = 1;
}
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 relocs_copied 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
&& (sec->flags & SEC_ALLOC) != 0
&& (r_type != R_386_PC32
|| (h != NULL
&& (! SYMBOLIC_BIND (info, h)
|| h->root.type == bfd_link_hash_defweak
|| !h->def_regular))))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
&& (sec->flags & SEC_ALLOC) != 0
&& h != NULL
&& (h->root.type == bfd_link_hash_defweak
|| !h->def_regular)))
{
struct elf_i386_dyn_relocs *p;
struct elf_i386_dyn_relocs **head;
Create a reloc section in dynobj and make room for
this reloc. */
if (sreloc == NULL)
{
const char *name;
bfd *dynobj;
unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
if (name == NULL)
return FALSE;
if (! CONST_STRNEQ (name, ".rel")
|| strcmp (bfd_get_section_name (abfd, sec),
name + 4) != 0)
{
(*_bfd_error_handler)
(_("%B: bad relocation section name `%s\'"),
abfd, name);
}
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
dynobj = htab->elf.dynobj;
sreloc = bfd_get_section_by_name (dynobj, name);
if (sreloc == NULL)
{
flagword flags;
flags = (SEC_HAS_CONTENTS | SEC_READONLY
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
if ((sec->flags & SEC_ALLOC) != 0)
flags |= SEC_ALLOC | SEC_LOAD;
sreloc = bfd_make_section_with_flags (dynobj,
name,
flags);
if (sreloc == NULL
|| ! bfd_set_section_alignment (dynobj, sreloc, 2))
return FALSE;
}
elf_section_data (sec)->sreloc = sreloc;
}
relocations we need for this symbol. */
if (h != NULL)
{
head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
}
else
{
void **vpp;
We really need local syms available to do this
easily. Oh well. */
asection *s;
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 elf_i386_dyn_relocs **)vpp;
}
p = *head;
if (p == NULL || p->sec != sec)
{
bfd_size_type amt = sizeof *p;
p = bfd_alloc (htab->elf.dynobj, amt);
if (p == NULL)
return FALSE;
p->next = *head;
*head = p;
p->sec = sec;
p->count = 0;
p->pc_count = 0;
}
p->count += 1;
if (r_type == R_386_PC32)
p->pc_count += 1;
}
break;
Reconstruct it for later use during GC. */
case R_386_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_386_GNU_VTENTRY:
BFD_ASSERT (h != NULL);
if (h != NULL
&& !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
return FALSE;
break;
default:
break;
}
}
return TRUE;
}
relocation. */
static asection *
elf_i386_gc_mark_hook (asection *sec,
struct bfd_link_info *info,
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_386_GNU_VTINHERIT:
case R_386_GNU_VTENTRY:
return NULL;
}
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
}
static bfd_boolean
elf_i386_gc_sweep_hook (bfd *abfd,
struct bfd_link_info *info,
asection *sec,
const Elf_Internal_Rela *relocs)
{
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel, *relend;
if (info->relocatable)
return TRUE;
elf_section_data (sec)->local_dynrel = NULL;
symtab_hdr = &elf_symtab_hdr (abfd);
sym_hashes = elf_sym_hashes (abfd);
local_got_refcounts = elf_local_got_refcounts (abfd);
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; rel++)
{
unsigned long r_symndx;
unsigned int 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 elf_i386_link_hash_entry *eh;
struct elf_i386_dyn_relocs **pp;
struct elf_i386_dyn_relocs *p;
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
eh = (struct elf_i386_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);
if (! elf_i386_tls_transition (info, abfd, sec, NULL,
symtab_hdr, sym_hashes,
&r_type, GOT_UNKNOWN,
rel, relend, h))
return FALSE;
switch (r_type)
{
case R_386_TLS_LDM:
if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
break;
case R_386_TLS_GD:
case R_386_TLS_GOTDESC:
case R_386_TLS_DESC_CALL:
case R_386_TLS_IE_32:
case R_386_TLS_IE:
case R_386_TLS_GOTIE:
case R_386_GOT32:
if (h != NULL)
{
if (h->got.refcount > 0)
h->got.refcount -= 1;
}
else if (local_got_refcounts != NULL)
{
if (local_got_refcounts[r_symndx] > 0)
local_got_refcounts[r_symndx] -= 1;
}
break;
case R_386_32:
case R_386_PC32:
if (info->shared)
break;
case R_386_PLT32:
if (h != NULL)
{
if (h->plt.refcount > 0)
h->plt.refcount -= 1;
}
break;
default:
break;
}
}
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
elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
struct elf_link_hash_entry *h)
{
struct elf_i386_link_hash_table *htab;
asection *s;
will fill in the contents of the procedure linkage table later,
when we know the address of the .got section. */
if (h->type == STT_FUNC
|| h->needs_plt)
{
if (h->plt.refcount <= 0
|| SYMBOL_CALLS_LOCAL (info, h)
|| (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
&& h->root.type == bfd_link_hash_undefweak))
{
file, but the symbol was never referred to by a dynamic
object, or if all references were garbage collected. In
such a case, we don't actually need to build a procedure
linkage table, and we can just do a PC32 reloc instead. */
h->plt.offset = (bfd_vma) -1;
h->needs_plt = 0;
}
return TRUE;
}
else
needed for an R_386_PC32 reloc to a non-function sym in
check_relocs. We can't decide accurately between function and
non-function syms in check-relocs; Objects loaded later in
the link may change h->type. So fix it now. */
h->plt.offset = (bfd_vma) -1;
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 || info->nocopyreloc)
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;
if (info->nocopyreloc)
{
h->non_got_ref = 0;
return TRUE;
}
htab = elf_i386_hash_table (info);
we can keep the dynamic relocs and avoid the copy reloc. This
doesn't work on VxWorks, where we can not have dynamic relocations
(other than copy and jump slot relocations) in an executable. */
if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
{
struct elf_i386_link_hash_entry * eh;
struct elf_i386_dyn_relocs *p;
eh = (struct elf_i386_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
s = p->sec->output_section;
if (s != NULL && (s->flags & SEC_READONLY) != 0)
break;
}
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. */
copy the initial value out of the dynamic object and into the
runtime process image. */
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
{
htab->srelbss->size += sizeof (Elf32_External_Rel);
h->needs_copy = 1;
}
s = htab->sdynbss;
return _bfd_elf_adjust_dynamic_copy (h, s);
}
dynamic relocs. */
static bfd_boolean
allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
{
struct bfd_link_info *info;
struct elf_i386_link_hash_table *htab;
struct elf_i386_link_hash_entry *eh;
struct elf_i386_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;
info = (struct bfd_link_info *) inf;
htab = elf_i386_hash_table (info);
if (htab->elf.dynamic_sections_created
&& h->plt.refcount > 0)
{
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;
}
if (info->shared
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
{
asection *s = htab->splt;
first entry. */
if (s->size == 0)
s->size += PLT_ENTRY_SIZE;
h->plt.offset = s->size;
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 = h->plt.offset;
}
s->size += PLT_ENTRY_SIZE;
will be placed in the .got section by the linker script. */
htab->sgotplt->size += 4;
htab->srelplt->size += sizeof (Elf32_External_Rel);
htab->next_tls_desc_index++;
if (htab->is_vxworks && !info->shared)
{
in executables. They go in a separate relocation section,
which is processed by the kernel loader. */
R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
if (h->plt.offset == PLT_ENTRY_SIZE)
htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
an R_386_32 relocation for the GOT entry, and an R_386_32
relocation for the PLT entry. */
htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
}
}
else
{
h->plt.offset = (bfd_vma) -1;
h->needs_plt = 0;
}
}
else
{
h->plt.offset = (bfd_vma) -1;
h->needs_plt = 0;
}
eh = (struct elf_i386_link_hash_entry *) h;
eh->tlsdesc_got = (bfd_vma) -1;
make it a R_386_TLS_LE_32 requiring no TLS entry. */
if (h->got.refcount > 0
&& !info->shared
&& h->dynindx == -1
&& (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
h->got.offset = (bfd_vma) -1;
else if (h->got.refcount > 0)
{
asection *s;
bfd_boolean dyn;
int tls_type = elf_i386_hash_entry(h)->tls_type;
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;
}
s = htab->sgot;
if (GOT_TLS_GDESC_P (tls_type))
{
eh->tlsdesc_got = htab->sgotplt->size
- elf_i386_compute_jump_table_size (htab);
htab->sgotplt->size += 8;
h->got.offset = (bfd_vma) -2;
}
if (! GOT_TLS_GDESC_P (tls_type)
|| GOT_TLS_GD_P (tls_type))
{
h->got.offset = s->size;
s->size += 4;
if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
s->size += 4;
}
dyn = htab->elf.dynamic_sections_created;
R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
(but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
need two), R_386_TLS_GD needs one if local symbol and two if
global. */
if (tls_type == GOT_TLS_IE_BOTH)
htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
|| (tls_type & GOT_TLS_IE))
htab->srelgot->size += sizeof (Elf32_External_Rel);
else if (GOT_TLS_GD_P (tls_type))
htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
else if (! GOT_TLS_GDESC_P (tls_type)
&& (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak)
&& (info->shared
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
htab->srelgot->size += sizeof (Elf32_External_Rel);
if (GOT_TLS_GDESC_P (tls_type))
htab->srelplt->size += sizeof (Elf32_External_Rel);
}
else
h->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 pc-relative relocs that have become local due to symbol
visibility changes. */
if (info->shared)
{
appear on a call or on something like ".long foo - .". 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 assembly like ".long foo - .". */
if (SYMBOL_CALLS_LOCAL (info, h))
{
struct elf_i386_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;
}
}
if (htab->is_vxworks)
{
struct elf_i386_dyn_relocs **pp;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
{
if (strcmp (p->sec->output_section->name, ".tls_vars") == 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)
|| (htab->elf.dynamic_sections_created
&& (h->root.type == bfd_link_hash_undefweak
|| h->root.type == bfd_link_hash_undefined))))
{
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_Rel);
}
return TRUE;
}
static bfd_boolean
readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
{
struct elf_i386_link_hash_entry *eh;
struct elf_i386_dyn_relocs *p;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
eh = (struct elf_i386_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
asection *s = p->sec->output_section;
if (s != NULL && (s->flags & SEC_READONLY) != 0)
{
struct bfd_link_info *info = (struct bfd_link_info *) inf;
info->flags |= DF_TEXTREL;
return FALSE;
}
}
return TRUE;
}
static bfd_boolean
elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info)
{
struct elf_i386_link_hash_table *htab;
bfd *dynobj;
asection *s;
bfd_boolean relocs;
bfd *ibfd;
htab = elf_i386_hash_table (info);
dynobj = htab->elf.dynobj;
if (dynobj == NULL)
abort ();
if (htab->elf.dynamic_sections_created)
{
if (info->executable)
{
s = bfd_get_section_by_name (dynobj, ".interp");
if (s == NULL)
abort ();
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
}
}
relocs. */
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
{
bfd_signed_vma *local_got;
bfd_signed_vma *end_local_got;
char *local_tls_type;
bfd_vma *local_tlsdesc_gotent;
bfd_size_type locsymcount;
Elf_Internal_Shdr *symtab_hdr;
asection *srel;
if (! is_i386_elf (ibfd))
continue;
for (s = ibfd->sections; s != NULL; s = s->next)
{
struct elf_i386_dyn_relocs *p;
for (p = ((struct elf_i386_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 (htab->is_vxworks
&& strcmp (p->sec->output_section->name,
".tls_vars") == 0)
{
handled specially by the loader. */
}
else if (p->count != 0)
{
srel = elf_section_data (p->sec)->sreloc;
srel->size += p->count * sizeof (Elf32_External_Rel);
if ((p->sec->output_section->flags & SEC_READONLY) != 0)
info->flags |= DF_TEXTREL;
}
}
}
local_got = elf_local_got_refcounts (ibfd);
if (!local_got)
continue;
symtab_hdr = &elf_symtab_hdr (ibfd);
locsymcount = symtab_hdr->sh_info;
end_local_got = local_got + locsymcount;
local_tls_type = elf_i386_local_got_tls_type (ibfd);
local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
s = htab->sgot;
srel = htab->srelgot;
for (; local_got < end_local_got;
++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
{
*local_tlsdesc_gotent = (bfd_vma) -1;
if (*local_got > 0)
{
if (GOT_TLS_GDESC_P (*local_tls_type))
{
*local_tlsdesc_gotent = htab->sgotplt->size
- elf_i386_compute_jump_table_size (htab);
htab->sgotplt->size += 8;
*local_got = (bfd_vma) -2;
}
if (! GOT_TLS_GDESC_P (*local_tls_type)
|| GOT_TLS_GD_P (*local_tls_type))
{
*local_got = s->size;
s->size += 4;
if (GOT_TLS_GD_P (*local_tls_type)
|| *local_tls_type == GOT_TLS_IE_BOTH)
s->size += 4;
}
if (info->shared
|| GOT_TLS_GD_ANY_P (*local_tls_type)
|| (*local_tls_type & GOT_TLS_IE))
{
if (*local_tls_type == GOT_TLS_IE_BOTH)
srel->size += 2 * sizeof (Elf32_External_Rel);
else if (GOT_TLS_GD_P (*local_tls_type)
|| ! GOT_TLS_GDESC_P (*local_tls_type))
srel->size += sizeof (Elf32_External_Rel);
if (GOT_TLS_GDESC_P (*local_tls_type))
htab->srelplt->size += sizeof (Elf32_External_Rel);
}
}
else
*local_got = (bfd_vma) -1;
}
}
if (htab->tls_ldm_got.refcount > 0)
{
relocs. */
htab->tls_ldm_got.offset = htab->sgot->size;
htab->sgot->size += 8;
htab->srelgot->size += sizeof (Elf32_External_Rel);
}
else
htab->tls_ldm_got.offset = -1;
sym dynamic relocs. */
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
incremented. However, when we reserve space for TLS descriptors,
it's not incremented, so in order to compute the space reserved
for them, it suffices to multiply the reloc count by the jump
slot size. */
if (htab->srelplt)
htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
Allocate memory for them. */
relocs = FALSE;
for (s = dynobj->sections; s != NULL; s = s->next)
{
bfd_boolean strip_section = TRUE;
if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
if (s == htab->splt
|| s == htab->sgot
|| s == htab->sgotplt
|| s == htab->sdynbss)
{
comment below. */
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 (htab->elf.hplt != NULL)
strip_section = FALSE;
}
else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
{
if (s->size != 0 && s != htab->srelplt && s != htab->srelplt2)
relocs = TRUE;
to copy relocs into the output file. */
s->reloc_count = 0;
}
else
{
continue;
}
if (s->size == 0)
{
output file. This is mostly to handle .rel.bss and
.rel.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. */
if (strip_section)
s->flags |= SEC_EXCLUDE;
continue;
}
if ((s->flags & SEC_HAS_CONTENTS) == 0)
continue;
here in case unused entries are not reclaimed before the
section's contents are written out. This should not happen,
but this way if it does, we get a R_386_NONE reloc instead
of garbage. */
s->contents = bfd_zalloc (dynobj, s->size);
if (s->contents == NULL)
return FALSE;
}
if (htab->elf.dynamic_sections_created)
{
values later, in elf_i386_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->splt->size != 0)
{
if (!add_dynamic_entry (DT_PLTGOT, 0)
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
|| !add_dynamic_entry (DT_PLTREL, DT_REL)
|| !add_dynamic_entry (DT_JMPREL, 0))
return FALSE;
}
if (relocs)
{
if (!add_dynamic_entry (DT_REL, 0)
|| !add_dynamic_entry (DT_RELSZ, 0)
|| !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
return FALSE;
then we need a DT_TEXTREL entry. */
if ((info->flags & DF_TEXTREL) == 0)
elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
(PTR) info);
if ((info->flags & DF_TEXTREL) != 0)
{
if (!add_dynamic_entry (DT_TEXTREL, 0))
return FALSE;
}
}
if (htab->is_vxworks
&& !elf_vxworks_add_dynamic_entries (output_bfd, info))
return FALSE;
}
#undef add_dynamic_entry
return TRUE;
}
static bfd_boolean
elf_i386_always_size_sections (bfd *output_bfd,
struct bfd_link_info *info)
{
asection *tls_sec = elf_hash_table (info)->tls_sec;
if (tls_sec)
{
struct elf_link_hash_entry *tlsbase;
tlsbase = elf_link_hash_lookup (elf_hash_table (info),
"_TLS_MODULE_BASE_",
FALSE, FALSE, FALSE);
if (tlsbase && tlsbase->type == STT_TLS)
{
struct bfd_link_hash_entry *bh = NULL;
const struct elf_backend_data *bed
= get_elf_backend_data (output_bfd);
if (!(_bfd_generic_link_add_one_symbol
(info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
tls_sec, 0, NULL, FALSE,
bed->collect, &bh)))
return FALSE;
elf_i386_hash_table (info)->tls_module_base = bh;
tlsbase = (struct elf_link_hash_entry *)bh;
tlsbase->def_regular = 1;
tlsbase->other = STV_HIDDEN;
(*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
}
}
return TRUE;
}
section name, which is a hack, but ought to work. */
static bfd_boolean
elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
Elf_Internal_Shdr *hdr,
asection *sec)
{
register const char *name;
name = bfd_get_section_name (abfd, sec);
needed when producing EFI binaries on x86. It tells
elf.c:elf_fake_sections() not to consider ".reloc" as a section
containing ELF relocation info. We need this hack in order to
be able to generate ELF binaries that can be translated into
EFI applications (which are essentially COFF objects). Those
files contain a COFF ".reloc" section inside an ELFNN object,
which would normally cause BFD to segfault because it would
attempt to interpret this section as containing relocation
entries for section "oc". With this hack enabled, ".reloc"
will be treated as a normal data section, which will avoid the
segfault. However, you won't be able to create an ELFNN binary
with a section named "oc" that needs relocations, but that's
the kind of ugly side-effects you get when detecting section
types based on their names... In practice, this limitation is
unlikely to bite. */
if (strcmp (name, ".reloc") == 0)
hdr->sh_type = SHT_PROGBITS;
return TRUE;
}
executables. Rather than setting it to the beginning of the TLS
section, we have to set it to the end. This function may be called
multiple times, it is idempotent. */
static void
set_tls_module_base (struct bfd_link_info *info)
{
struct bfd_link_hash_entry *base;
if (!info->executable)
return;
base = elf_i386_hash_table (info)->tls_module_base;
if (!base)
return;
base->u.def.value = elf_hash_table (info)->tls_size;
}
when resolving @dtpoff relocation.
This is PT_TLS segment p_vaddr. */
static bfd_vma
dtpoff_base (struct bfd_link_info *info)
{
if (elf_hash_table (info)->tls_sec == NULL)
return 0;
return elf_hash_table (info)->tls_sec->vma;
}
if STT_TLS virtual address is ADDRESS. */
static bfd_vma
tpoff (struct bfd_link_info *info, bfd_vma address)
{
struct elf_link_hash_table *htab = elf_hash_table (info);
if (htab->tls_sec == NULL)
return 0;
return htab->tls_size + htab->tls_sec->vma - address;
}
static bfd_boolean
elf_i386_relocate_section (bfd *output_bfd,
struct bfd_link_info *info,
bfd *input_bfd,
asection *input_section,
bfd_byte *contents,
Elf_Internal_Rela *relocs,
Elf_Internal_Sym *local_syms,
asection **local_sections)
{
struct elf_i386_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
bfd_vma *local_got_offsets;
bfd_vma *local_tlsdesc_gotents;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
bfd_boolean is_vxworks_tls;
BFD_ASSERT (is_i386_elf (input_bfd));
htab = elf_i386_hash_table (info);
symtab_hdr = &elf_symtab_hdr (input_bfd);
sym_hashes = elf_sym_hashes (input_bfd);
local_got_offsets = elf_local_got_offsets (input_bfd);
local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
specially, because the dynamic loader is 'weird'. */
is_vxworks_tls = (htab->is_vxworks && info->shared
&& !strcmp (input_section->output_section->name,
".tls_vars"));
set_tls_module_base (info);
rel = relocs;
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
{
unsigned int r_type;
reloc_howto_type *howto;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
asection *sec;
bfd_vma off, offplt;
bfd_vma relocation;
bfd_boolean unresolved_reloc;
bfd_reloc_status_type r;
unsigned int indx;
int tls_type;
r_type = ELF32_R_TYPE (rel->r_info);
if (r_type == R_386_GNU_VTINHERIT
|| r_type == R_386_GNU_VTENTRY)
continue;
if ((indx = r_type) >= R_386_standard
&& ((indx = r_type - R_386_ext_offset) - R_386_standard
>= R_386_ext - R_386_standard)
&& ((indx = r_type - R_386_tls_offset) - R_386_ext
>= R_386_tls - R_386_ext))
{
(*_bfd_error_handler)
(_("%B: unrecognized relocation (0x%x) in section `%A'"),
input_bfd, input_section, r_type);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
howto = elf_howto_table + indx;
r_symndx = ELF32_R_SYM (rel->r_info);
h = NULL;
sym = NULL;
sec = NULL;
unresolved_reloc = FALSE;
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
relocation = (sec->output_section->vma
+ sec->output_offset
+ sym->st_value);
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
&& ((sec->flags & SEC_MERGE) != 0
|| (info->relocatable
&& sec->output_offset != 0)))
{
bfd_vma addend;
bfd_byte *where = contents + rel->r_offset;
switch (howto->size)
{
case 0:
addend = bfd_get_8 (input_bfd, where);
if (howto->pc_relative)
{
addend = (addend ^ 0x80) - 0x80;
addend += 1;
}
break;
case 1:
addend = bfd_get_16 (input_bfd, where);
if (howto->pc_relative)
{
addend = (addend ^ 0x8000) - 0x8000;
addend += 2;
}
break;
case 2:
addend = bfd_get_32 (input_bfd, where);
if (howto->pc_relative)
{
addend = (addend ^ 0x80000000) - 0x80000000;
addend += 4;
}
break;
default:
abort ();
}
if (info->relocatable)
addend += sec->output_offset;
else
{
asection *msec = sec;
addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
addend);
addend -= relocation;
addend += msec->output_section->vma + msec->output_offset;
}
switch (howto->size)
{
case 0:
if (howto->pc_relative)
addend -= 1;
bfd_put_8 (input_bfd, addend, where);
break;
case 1:
if (howto->pc_relative)
addend -= 2;
bfd_put_16 (input_bfd, addend, where);
break;
case 2:
if (howto->pc_relative)
addend -= 4;
bfd_put_32 (input_bfd, addend, where);
break;
}
}
}
else
{
bfd_boolean warned;
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
r_symndx, symtab_hdr, sym_hashes,
h, sec, relocation,
unresolved_reloc, warned);
}
if (sec != NULL && elf_discarded_section (sec))
{
or sections discarded by a linker script, we just want the
section contents zeroed. Avoid any special processing. */
_bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
rel->r_info = 0;
rel->r_addend = 0;
continue;
}
if (info->relocatable)
continue;
switch (r_type)
{
case R_386_GOT32:
offset table. */
if (htab->sgot == NULL)
abort ();
if (h != NULL)
{
bfd_boolean dyn;
off = h->got.offset;
dyn = htab->elf.dynamic_sections_created;
if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
|| (info->shared
&& SYMBOL_REFERENCES_LOCAL (info, h))
|| (ELF_ST_VISIBILITY (h->other)
&& h->root.type == bfd_link_hash_undefweak))
{
-Bsymbolic link and the symbol is defined
locally, or the symbol was forced to be local
because of a version file. We must initialize
this entry in the global offset table. Since the
offset must always be a multiple of 4, we use the
least significant bit to record whether we have
initialized it already.
When doing a dynamic link, we create a .rel.got
relocation entry to initialize the value. This
is done in the finish_dynamic_symbol routine. */
if ((off & 1) != 0)
off &= ~1;
else
{
bfd_put_32 (output_bfd, relocation,
htab->sgot->contents + off);
h->got.offset |= 1;
}
}
else
unresolved_reloc = FALSE;
}
else
{
if (local_got_offsets == NULL)
abort ();
off = local_got_offsets[r_symndx];
the least significant bit to record whether we have
already generated the necessary reloc. */
if ((off & 1) != 0)
off &= ~1;
else
{
bfd_put_32 (output_bfd, relocation,
htab->sgot->contents + off);
if (info->shared)
{
asection *s;
Elf_Internal_Rela outrel;
bfd_byte *loc;
s = htab->srelgot;
if (s == NULL)
abort ();
outrel.r_offset = (htab->sgot->output_section->vma
+ htab->sgot->output_offset
+ off);
outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
loc = s->contents;
loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
}
local_got_offsets[r_symndx] |= 1;
}
}
if (off >= (bfd_vma) -2)
abort ();
relocation = htab->sgot->output_section->vma
+ htab->sgot->output_offset + off
- htab->sgotplt->output_section->vma
- htab->sgotplt->output_offset;
break;
case R_386_GOTOFF:
table. */
for shared library since it may not be local when used
as function address. We also need to make sure that a
symbol is defined locally. */
if (info->shared && h)
{
if (!h->def_regular)
{
const char *v;
switch (ELF_ST_VISIBILITY (h->other))
{
case STV_HIDDEN:
v = _("hidden symbol");
break;
case STV_INTERNAL:
v = _("internal symbol");
break;
case STV_PROTECTED:
v = _("protected symbol");
break;
default:
v = _("symbol");
break;
}
(*_bfd_error_handler)
(_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
input_bfd, v, h->root.root.string);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
else if (!info->executable
&& h->type == STT_FUNC
&& ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
{
(*_bfd_error_handler)
(_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
input_bfd, h->root.root.string);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
}
calculation. We always want the start of .got.plt. If we
defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
permitted by the ABI, we might have to change this
calculation. */
relocation -= htab->sgotplt->output_section->vma
+ htab->sgotplt->output_offset;
break;
case R_386_GOTPC:
relocation = htab->sgotplt->output_section->vma
+ htab->sgotplt->output_offset;
unresolved_reloc = FALSE;
break;
case R_386_PLT32:
procedure linkage table. */
without using the procedure linkage table. */
if (h == NULL)
break;
if (h->plt.offset == (bfd_vma) -1
|| htab->splt == NULL)
{
happens when statically linking PIC code, or when
using -Bsymbolic. */
break;
}
relocation = (htab->splt->output_section->vma
+ htab->splt->output_offset
+ h->plt.offset);
unresolved_reloc = FALSE;
break;
case R_386_32:
case R_386_PC32:
if ((input_section->flags & SEC_ALLOC) == 0
|| is_vxworks_tls)
break;
if ((info->shared
&& (h == NULL
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak)
&& (r_type != R_386_PC32
|| !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)
|| h->root.type == bfd_link_hash_undefweak
|| h->root.type == bfd_link_hash_undefined)))
{
Elf_Internal_Rela outrel;
bfd_byte *loc;
bfd_boolean skip, relocate;
asection *sreloc;
are copied into the output file to be resolved at run
time. */
skip = FALSE;
relocate = FALSE;
outrel.r_offset =
_bfd_elf_section_offset (output_bfd, info, input_section,
rel->r_offset);
if (outrel.r_offset == (bfd_vma) -1)
skip = TRUE;
else if (outrel.r_offset == (bfd_vma) -2)
skip = TRUE, relocate = TRUE;
outrel.r_offset += (input_section->output_section->vma
+ input_section->output_offset);
if (skip)
memset (&outrel, 0, sizeof outrel);
else if (h != NULL
&& h->dynindx != -1
&& (r_type == R_386_PC32
|| !info->shared
|| !SYMBOLIC_BIND (info, h)
|| !h->def_regular))
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
else
{
relocate = TRUE;
outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
}
sreloc = elf_section_data (input_section)->sreloc;
if (sreloc == NULL)
abort ();
loc = sreloc->contents;
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
not want to fiddle with the addend. Otherwise, we
need to include the symbol value so that it becomes
an addend for the dynamic reloc. */
if (! relocate)
continue;
}
break;
case R_386_TLS_IE:
if (info->shared)
{
Elf_Internal_Rela outrel;
bfd_byte *loc;
asection *sreloc;
outrel.r_offset = rel->r_offset
+ input_section->output_section->vma
+ input_section->output_offset;
outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
sreloc = elf_section_data (input_section)->sreloc;
if (sreloc == NULL)
abort ();
loc = sreloc->contents;
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
}
case R_386_TLS_GD:
case R_386_TLS_GOTDESC:
case R_386_TLS_DESC_CALL:
case R_386_TLS_IE_32:
case R_386_TLS_GOTIE:
tls_type = GOT_UNKNOWN;
if (h == NULL && local_got_offsets)
tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
else if (h != NULL)
tls_type = elf_i386_hash_entry(h)->tls_type;
if (tls_type == GOT_TLS_IE)
tls_type = GOT_TLS_IE_NEG;
if (! elf_i386_tls_transition (info, input_bfd,
input_section, contents,
symtab_hdr, sym_hashes,
&r_type, tls_type, rel,
relend, h))
return FALSE;
if (r_type == R_386_TLS_LE_32)
{
BFD_ASSERT (! unresolved_reloc);
if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
{
unsigned int type;
bfd_vma roff;
type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
if (type == 0x04)
{
Change it into:
movl %gs:0, %eax; subl $foo@tpoff, %eax
(6 byte form of subl). */
memcpy (contents + rel->r_offset - 3,
"\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
roff = rel->r_offset + 5;
}
else
{
Change it into:
movl %gs:0, %eax; subl $foo@tpoff, %eax
(6 byte form of subl). */
memcpy (contents + rel->r_offset - 2,
"\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
roff = rel->r_offset + 6;
}
bfd_put_32 (output_bfd, tpoff (info, relocation),
contents + roff);
rel++;
continue;
}
else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
{
It's originally something like:
leal x@tlsdesc(%ebx), %eax
leal x@ntpoff, %eax
Registers other than %eax may be set up here. */
unsigned int val;
bfd_vma roff;
roff = rel->r_offset;
val = bfd_get_8 (input_bfd, contents + roff - 1);
below with 0x86. */
bfd_put_8 (output_bfd, val ^ 0x86,
contents + roff - 1);
bfd_put_32 (output_bfd, -tpoff (info, relocation),
contents + roff);
continue;
}
else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
{
It's originally:
call *(%eax)
Turn it into:
xchg %ax,%ax */
bfd_vma roff;
roff = rel->r_offset;
bfd_put_8 (output_bfd, 0x66, contents + roff);
bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
continue;
}
else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
{
unsigned int val;
Originally it can be one of:
movl foo, %eax
movl foo, %reg
addl foo, %reg
We change it into:
movl $foo, %eax
movl $foo, %reg
addl $foo, %reg. */
val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
if (val == 0xa1)
{
bfd_put_8 (output_bfd, 0xb8,
contents + rel->r_offset - 1);
}
else
{
unsigned int type;
type = bfd_get_8 (input_bfd,
contents + rel->r_offset - 2);
switch (type)
{
case 0x8b:
bfd_put_8 (output_bfd, 0xc7,
contents + rel->r_offset - 2);
bfd_put_8 (output_bfd,
0xc0 | ((val >> 3) & 7),
contents + rel->r_offset - 1);
break;
case 0x03:
bfd_put_8 (output_bfd, 0x81,
contents + rel->r_offset - 2);
bfd_put_8 (output_bfd,
0xc0 | ((val >> 3) & 7),
contents + rel->r_offset - 1);
break;
default:
BFD_FAIL ();
break;
}
}
bfd_put_32 (output_bfd, -tpoff (info, relocation),
contents + rel->r_offset);
continue;
}
else
{
unsigned int val, type;
Originally it can be one of:
subl foo(%reg1), %reg2
movl foo(%reg1), %reg2
addl foo(%reg1), %reg2
We change it into:
subl $foo, %reg2
movl $foo, %reg2 (6 byte form)
addl $foo, %reg2. */
type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
if (type == 0x8b)
{
bfd_put_8 (output_bfd, 0xc7,
contents + rel->r_offset - 2);
bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
contents + rel->r_offset - 1);
}
else if (type == 0x2b)
{
bfd_put_8 (output_bfd, 0x81,
contents + rel->r_offset - 2);
bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
contents + rel->r_offset - 1);
}
else if (type == 0x03)
{
bfd_put_8 (output_bfd, 0x81,
contents + rel->r_offset - 2);
bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
contents + rel->r_offset - 1);
}
else
BFD_FAIL ();
if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
bfd_put_32 (output_bfd, -tpoff (info, relocation),
contents + rel->r_offset);
else
bfd_put_32 (output_bfd, tpoff (info, relocation),
contents + rel->r_offset);
continue;
}
}
if (htab->sgot == NULL)
abort ();
if (h != NULL)
{
off = h->got.offset;
offplt = elf_i386_hash_entry (h)->tlsdesc_got;
}
else
{
if (local_got_offsets == NULL)
abort ();
off = local_got_offsets[r_symndx];
offplt = local_tlsdesc_gotents[r_symndx];
}
if ((off & 1) != 0)
off &= ~1;
else
{
Elf_Internal_Rela outrel;
bfd_byte *loc;
int dr_type, indx;
asection *sreloc;
if (htab->srelgot == NULL)
abort ();
indx = h && h->dynindx != -1 ? h->dynindx : 0;
if (GOT_TLS_GDESC_P (tls_type))
{
outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
<= htab->sgotplt->size);
outrel.r_offset = (htab->sgotplt->output_section->vma
+ htab->sgotplt->output_offset
+ offplt
+ htab->sgotplt_jump_table_size);
sreloc = htab->srelplt;
loc = sreloc->contents;
loc += (htab->next_tls_desc_index++
* sizeof (Elf32_External_Rel));
BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
<= sreloc->contents + sreloc->size);
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
if (indx == 0)
{
BFD_ASSERT (! unresolved_reloc);
bfd_put_32 (output_bfd,
relocation - dtpoff_base (info),
htab->sgotplt->contents + offplt
+ htab->sgotplt_jump_table_size + 4);
}
else
{
bfd_put_32 (output_bfd, 0,
htab->sgotplt->contents + offplt
+ htab->sgotplt_jump_table_size + 4);
}
}
sreloc = htab->srelgot;
outrel.r_offset = (htab->sgot->output_section->vma
+ htab->sgot->output_offset + off);
if (GOT_TLS_GD_P (tls_type))
dr_type = R_386_TLS_DTPMOD32;
else if (GOT_TLS_GDESC_P (tls_type))
goto dr_done;
else if (tls_type == GOT_TLS_IE_POS)
dr_type = R_386_TLS_TPOFF;
else
dr_type = R_386_TLS_TPOFF32;
if (dr_type == R_386_TLS_TPOFF && indx == 0)
bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
htab->sgot->contents + off);
else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
bfd_put_32 (output_bfd, dtpoff_base (info) - relocation,
htab->sgot->contents + off);
else if (dr_type != R_386_TLS_DESC)
bfd_put_32 (output_bfd, 0,
htab->sgot->contents + off);
outrel.r_info = ELF32_R_INFO (indx, dr_type);
loc = sreloc->contents;
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
<= sreloc->contents + sreloc->size);
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
if (GOT_TLS_GD_P (tls_type))
{
if (indx == 0)
{
BFD_ASSERT (! unresolved_reloc);
bfd_put_32 (output_bfd,
relocation - dtpoff_base (info),
htab->sgot->contents + off + 4);
}
else
{
bfd_put_32 (output_bfd, 0,
htab->sgot->contents + off + 4);
outrel.r_info = ELF32_R_INFO (indx,
R_386_TLS_DTPOFF32);
outrel.r_offset += 4;
sreloc->reloc_count++;
loc += sizeof (Elf32_External_Rel);
BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
<= sreloc->contents + sreloc->size);
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
}
}
else if (tls_type == GOT_TLS_IE_BOTH)
{
bfd_put_32 (output_bfd,
indx == 0 ? relocation - dtpoff_base (info) : 0,
htab->sgot->contents + off + 4);
outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
outrel.r_offset += 4;
sreloc->reloc_count++;
loc += sizeof (Elf32_External_Rel);
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
}
dr_done:
if (h != NULL)
h->got.offset |= 1;
else
local_got_offsets[r_symndx] |= 1;
}
if (off >= (bfd_vma) -2
&& ! GOT_TLS_GDESC_P (tls_type))
abort ();
if (r_type == R_386_TLS_GOTDESC
|| r_type == R_386_TLS_DESC_CALL)
{
relocation = htab->sgotplt_jump_table_size + offplt;
unresolved_reloc = FALSE;
}
else if (r_type == ELF32_R_TYPE (rel->r_info))
{
bfd_vma g_o_t = htab->sgotplt->output_section->vma
+ htab->sgotplt->output_offset;
relocation = htab->sgot->output_section->vma
+ htab->sgot->output_offset + off - g_o_t;
if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
&& tls_type == GOT_TLS_IE_BOTH)
relocation += 4;
if (r_type == R_386_TLS_IE)
relocation += g_o_t;
unresolved_reloc = FALSE;
}
else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
{
unsigned int val, type;
bfd_vma roff;
type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
if (type == 0x04)
{
Change it into:
movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
val >>= 3;
roff = rel->r_offset - 3;
}
else
{
Change it into:
movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
roff = rel->r_offset - 2;
}
memcpy (contents + roff,
"\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
contents[roff + 7] = 0x80 | (val & 7);
foo@indntpoff, but not with foo@gottpoff(%reg), change
subl $foo@gottpoff(%reg), %eax
into:
addl $foo@gotntpoff(%reg), %eax. */
if (tls_type == GOT_TLS_IE_POS)
contents[roff + 6] = 0x03;
bfd_put_32 (output_bfd,
htab->sgot->output_section->vma
+ htab->sgot->output_offset + off
- htab->sgotplt->output_section->vma
- htab->sgotplt->output_offset,
contents + roff + 8);
rel++;
continue;
}
else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
{
It's originally something like:
leal x@tlsdesc(%ebx), %eax
Change it to:
movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
or:
movl x@gottpoff(%ebx), %eax # before negl %eax
Registers other than %eax may be set up here. */
bfd_vma roff;
offset into any register, although it's probably
almost always going to be eax. */
roff = rel->r_offset;
suffices to change the first byte from 0x8d to 0x8b.
aoliva FIXME: should we decide to keep the leal, all
we have to do is remove the statement below, and
adjust the relaxation of R_386_TLS_DESC_CALL. */
bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
if (tls_type == GOT_TLS_IE_BOTH)
off += 4;
bfd_put_32 (output_bfd,
htab->sgot->output_section->vma
+ htab->sgot->output_offset + off
- htab->sgotplt->output_section->vma
- htab->sgotplt->output_offset,
contents + roff);
continue;
}
else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
{
It's originally:
call *(%eax)
Change it to:
xchg %ax,%ax
or
negl %eax
depending on how we transformed the TLS_GOTDESC above.
*/
bfd_vma roff;
roff = rel->r_offset;
if (tls_type != GOT_TLS_IE_NEG)
{
bfd_put_8 (output_bfd, 0x66, contents + roff);
bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
}
else
{
bfd_put_8 (output_bfd, 0xf7, contents + roff);
bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
}
continue;
}
else
BFD_ASSERT (FALSE);
break;
case R_386_TLS_LDM:
if (! elf_i386_tls_transition (info, input_bfd,
input_section, contents,
symtab_hdr, sym_hashes,
&r_type, GOT_UNKNOWN, rel,
relend, h))
return FALSE;
if (r_type != R_386_TLS_LDM)
{
leal foo(%reg), %eax; call ___tls_get_addr.
We change it into:
movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
BFD_ASSERT (r_type == R_386_TLS_LE_32);
memcpy (contents + rel->r_offset - 2,
"\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
rel++;
continue;
}
if (htab->sgot == NULL)
abort ();
off = htab->tls_ldm_got.offset;
if (off & 1)
off &= ~1;
else
{
Elf_Internal_Rela outrel;
bfd_byte *loc;
if (htab->srelgot == NULL)
abort ();
outrel.r_offset = (htab->sgot->output_section->vma
+ htab->sgot->output_offset + off);
bfd_put_32 (output_bfd, 0,
htab->sgot->contents + off);
bfd_put_32 (output_bfd, 0,
htab->sgot->contents + off + 4);
outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
loc = htab->srelgot->contents;
loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
htab->tls_ldm_got.offset |= 1;
}
relocation = htab->sgot->output_section->vma
+ htab->sgot->output_offset + off
- htab->sgotplt->output_section->vma
- htab->sgotplt->output_offset;
unresolved_reloc = FALSE;
break;
case R_386_TLS_LDO_32:
if (info->shared || (input_section->flags & SEC_CODE) == 0)
relocation -= dtpoff_base (info);
else
relocation = -tpoff (info, relocation);
break;
case R_386_TLS_LE_32:
case R_386_TLS_LE:
if (info->shared)
{
Elf_Internal_Rela outrel;
asection *sreloc;
bfd_byte *loc;
int indx;
outrel.r_offset = rel->r_offset
+ input_section->output_section->vma
+ input_section->output_offset;
if (h != NULL && h->dynindx != -1)
indx = h->dynindx;
else
indx = 0;
if (r_type == R_386_TLS_LE_32)
outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
else
outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
sreloc = elf_section_data (input_section)->sreloc;
if (sreloc == NULL)
abort ();
loc = sreloc->contents;
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
if (indx)
continue;
else if (r_type == R_386_TLS_LE_32)
relocation = dtpoff_base (info) - relocation;
else
relocation -= dtpoff_base (info);
}
else if (r_type == R_386_TLS_LE_32)
relocation = tpoff (info, relocation);
else
relocation = -tpoff (info, relocation);
break;
default:
break;
}
because such sections are not SEC_ALLOC and thus ld.so will
not process them. */
if (unresolved_reloc
&& !((input_section->flags & SEC_DEBUGGING) != 0
&& h->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,
h->root.root.string);
return FALSE;
}
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset,
relocation, 0);
if (r != bfd_reloc_ok)
{
const char *name;
if (h != NULL)
name = h->root.root.string;
else
{
name = bfd_elf_string_from_elf_section (input_bfd,
symtab_hdr->sh_link,
sym->st_name);
if (name == NULL)
return FALSE;
if (*name == '\0')
name = bfd_section_name (input_bfd, sec);
}
if (r == bfd_reloc_overflow)
{
if (! ((*info->callbacks->reloc_overflow)
(info, (h ? &h->root : NULL), name, howto->name,
(bfd_vma) 0, input_bfd, input_section,
rel->r_offset)))
return FALSE;
}
else
{
(*_bfd_error_handler)
(_("%B(%A+0x%lx): reloc against `%s': error %d"),
input_bfd, input_section,
(long) rel->r_offset, name, (int) r);
return FALSE;
}
}
}
return TRUE;
}
dynamic sections here. */
static bfd_boolean
elf_i386_finish_dynamic_symbol (bfd *output_bfd,
struct bfd_link_info *info,
struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym)
{
struct elf_i386_link_hash_table *htab;
htab = elf_i386_hash_table (info);
if (h->plt.offset != (bfd_vma) -1)
{
bfd_vma plt_index;
bfd_vma got_offset;
Elf_Internal_Rela rel;
bfd_byte *loc;
it up. */
if (h->dynindx == -1
|| htab->splt == NULL
|| htab->sgotplt == NULL
|| htab->srelplt == NULL)
abort ();
corresponds to this symbol. This is the index of this symbol
in all the symbols for which we are making plt entries. The
first entry in the procedure linkage table is reserved. */
plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
corresponds to this function. Each .got entry is 4 bytes.
The first three are reserved. */
got_offset = (plt_index + 3) * 4;
if (! info->shared)
{
memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
PLT_ENTRY_SIZE);
bfd_put_32 (output_bfd,
(htab->sgotplt->output_section->vma
+ htab->sgotplt->output_offset
+ got_offset),
htab->splt->contents + h->plt.offset + 2);
if (htab->is_vxworks)
{
int s, k, reloc_index;
for this PLT entry. */
s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
if (info->shared)
k = PLTRESOLVE_RELOCS_SHLIB;
else
k = PLTRESOLVE_RELOCS;
the other PLT slots. */
reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
loc = (htab->srelplt2->contents + reloc_index
* sizeof (Elf32_External_Rel));
rel.r_offset = (htab->splt->output_section->vma
+ htab->splt->output_offset
+ h->plt.offset + 2),
rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
the PLT for this GOT entry. */
rel.r_offset = (htab->sgotplt->output_section->vma
+ htab->sgotplt->output_offset
+ got_offset);
rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
bfd_elf32_swap_reloc_out (output_bfd, &rel,
loc + sizeof (Elf32_External_Rel));
}
}
else
{
memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
PLT_ENTRY_SIZE);
bfd_put_32 (output_bfd, got_offset,
htab->splt->contents + h->plt.offset + 2);
}
bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
htab->splt->contents + h->plt.offset + 7);
bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
htab->splt->contents + h->plt.offset + 12);
bfd_put_32 (output_bfd,
(htab->splt->output_section->vma
+ htab->splt->output_offset
+ h->plt.offset
+ 6),
htab->sgotplt->contents + got_offset);
rel.r_offset = (htab->sgotplt->output_section->vma
+ htab->sgotplt->output_offset
+ got_offset);
rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rel);
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
if (!h->def_regular)
{
the .plt section. Leave the value if there were any
relocations where pointer equality matters (this is a clue
for the dynamic linker, to make function pointer
comparisons work between an application and shared
library), otherwise set it to zero. If a function is only
called from a binary, there is no need to slow down
shared libraries because of that. */
sym->st_shndx = SHN_UNDEF;
if (!h->pointer_equality_needed)
sym->st_value = 0;
}
}
if (h->got.offset != (bfd_vma) -1
&& ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
&& (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
{
Elf_Internal_Rela rel;
bfd_byte *loc;
up. */
if (htab->sgot == NULL || htab->srelgot == NULL)
abort ();
rel.r_offset = (htab->sgot->output_section->vma
+ htab->sgot->output_offset
+ (h->got.offset & ~(bfd_vma) 1));
symbol is defined locally or was forced to be local because
of a version file, we just want to emit a RELATIVE reloc.
The entry in the global offset table will already have been
initialized in the relocate_section function. */
if (info->shared
&& SYMBOL_REFERENCES_LOCAL (info, h))
{
BFD_ASSERT((h->got.offset & 1) != 0);
rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
}
else
{
BFD_ASSERT((h->got.offset & 1) == 0);
bfd_put_32 (output_bfd, (bfd_vma) 0,
htab->sgot->contents + h->got.offset);
rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
}
loc = htab->srelgot->contents;
loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
}
if (h->needs_copy)
{
Elf_Internal_Rela rel;
bfd_byte *loc;
if (h->dynindx == -1
|| (h->root.type != bfd_link_hash_defined
&& h->root.type != bfd_link_hash_defweak)
|| htab->srelbss == NULL)
abort ();
rel.r_offset = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
loc = htab->srelbss->contents;
loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
}
On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
is relative to the ".got" section. */
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|| (!htab->is_vxworks && h == htab->elf.hgot))
sym->st_shndx = SHN_ABS;
return TRUE;
}
dynamic linker, before writing them out. */
static enum elf_reloc_type_class
elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
{
switch (ELF32_R_TYPE (rela->r_info))
{
case R_386_RELATIVE:
return reloc_class_relative;
case R_386_JUMP_SLOT:
return reloc_class_plt;
case R_386_COPY:
return reloc_class_copy;
default:
return reloc_class_normal;
}
}
static bfd_boolean
elf_i386_finish_dynamic_sections (bfd *output_bfd,
struct bfd_link_info *info)
{
struct elf_i386_link_hash_table *htab;
bfd *dynobj;
asection *sdyn;
htab = elf_i386_hash_table (info);
dynobj = htab->elf.dynobj;
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
if (htab->elf.dynamic_sections_created)
{
Elf32_External_Dyn *dyncon, *dynconend;
if (sdyn == NULL || htab->sgot == NULL)
abort ();
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)
{
default:
if (htab->is_vxworks
&& elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
break;
continue;
case DT_PLTGOT:
s = htab->sgotplt;
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
break;
case DT_JMPREL:
s = htab->srelplt;
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
break;
case DT_PLTRELSZ:
s = htab->srelplt;
dyn.d_un.d_val = s->size;
break;
case DT_RELSZ:
procedure linkage table relocs (DT_JMPREL) should be
included in the overall relocs (DT_REL). This is
what Solaris does. However, UnixWare can not handle
that case. Therefore, we override the DT_RELSZ entry
here to make it not include the JMPREL relocs. */
s = htab->srelplt;
if (s == NULL)
continue;
dyn.d_un.d_val -= s->size;
break;
case DT_REL:
If .rel.plt is the first .rel section, we adjust
DT_REL to not include it. */
s = htab->srelplt;
if (s == NULL)
continue;
if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
continue;
dyn.d_un.d_ptr += s->size;
break;
}
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
}
if (htab->splt && htab->splt->size > 0)
{
if (info->shared)
{
memcpy (htab->splt->contents, elf_i386_pic_plt0_entry,
sizeof (elf_i386_pic_plt0_entry));
memset (htab->splt->contents + sizeof (elf_i386_pic_plt0_entry),
htab->plt0_pad_byte,
PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
}
else
{
memcpy (htab->splt->contents, elf_i386_plt0_entry,
sizeof(elf_i386_plt0_entry));
memset (htab->splt->contents + sizeof (elf_i386_plt0_entry),
htab->plt0_pad_byte,
PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
bfd_put_32 (output_bfd,
(htab->sgotplt->output_section->vma
+ htab->sgotplt->output_offset
+ 4),
htab->splt->contents + 2);
bfd_put_32 (output_bfd,
(htab->sgotplt->output_section->vma
+ htab->sgotplt->output_offset
+ 8),
htab->splt->contents + 8);
if (htab->is_vxworks)
{
Elf_Internal_Rela rel;
On IA32 we use REL relocations so the addend goes in
the PLT directly. */
rel.r_offset = (htab->splt->output_section->vma
+ htab->splt->output_offset
+ 2);
rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
bfd_elf32_swap_reloc_out (output_bfd, &rel,
htab->srelplt2->contents);
rel.r_offset = (htab->splt->output_section->vma
+ htab->splt->output_offset
+ 8);
rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
bfd_elf32_swap_reloc_out (output_bfd, &rel,
htab->srelplt2->contents +
sizeof (Elf32_External_Rel));
}
}
really seem like the right value. */
elf_section_data (htab->splt->output_section)
->this_hdr.sh_entsize = 4;
if (htab->is_vxworks && !info->shared)
{
int num_plts = (htab->splt->size / PLT_ENTRY_SIZE) - 1;
unsigned char *p;
p = htab->srelplt2->contents;
if (info->shared)
p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
else
p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
for (; num_plts; num_plts--)
{
Elf_Internal_Rela rel;
bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
p += sizeof (Elf32_External_Rel);
bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
p += sizeof (Elf32_External_Rel);
}
}
}
}
if (htab->sgotplt)
{
if (htab->sgotplt->size > 0)
{
bfd_put_32 (output_bfd,
(sdyn == NULL ? 0
: sdyn->output_section->vma + sdyn->output_offset),
htab->sgotplt->contents);
bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4);
bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8);
}
elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
}
if (htab->sgot && htab->sgot->size > 0)
elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
return TRUE;
}
or (bfd_vma) -1 if it should not be included. */
static bfd_vma
elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
const arelent *rel ATTRIBUTE_UNUSED)
{
return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
}
static bfd_boolean
elf_i386_hash_symbol (struct elf_link_hash_entry *h)
{
if (h->plt.offset != (bfd_vma) -1
&& !h->def_regular
&& !h->pointer_equality_needed)
return FALSE;
return _bfd_elf_hash_symbol (h);
}
#define TARGET_LITTLE_SYM bfd_elf32_i386_vec
#define TARGET_LITTLE_NAME "elf32-i386"
#define ELF_ARCH bfd_arch_i386
#define ELF_MACHINE_CODE EM_386
#define ELF_MAXPAGESIZE 0x1000
#define elf_backend_can_gc_sections 1
#define elf_backend_can_refcount 1
#define elf_backend_want_got_plt 1
#define elf_backend_plt_readonly 1
#define elf_backend_want_plt_sym 0
#define elf_backend_got_header_size 12
#define elf_info_to_howto elf_i386_info_to_howto_rel
#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
#define bfd_elf32_mkobject elf_i386_mkobject
#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
#define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
#define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
#define elf_backend_check_relocs elf_i386_check_relocs
#define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
#define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
#define elf_backend_fake_sections elf_i386_fake_sections
#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
#define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
#define elf_backend_grok_prstatus elf_i386_grok_prstatus
#define elf_backend_grok_psinfo elf_i386_grok_psinfo
#define elf_backend_reloc_type_class elf_i386_reloc_type_class
#define elf_backend_relocate_section elf_i386_relocate_section
#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
#define elf_backend_always_size_sections elf_i386_always_size_sections
#define elf_backend_omit_section_dynsym \
((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
#define elf_backend_plt_sym_val elf_i386_plt_sym_val
#define elf_backend_hash_symbol elf_i386_hash_symbol
#include "elf32-target.h"
#undef TARGET_LITTLE_SYM
#define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
#undef ELF_OSABI
#define ELF_OSABI ELFOSABI_FREEBSD
"FreeBSD" label in the ELF header. So we put this label on all
executables and (for simplicity) also all other object files. */
static void
elf_i386_post_process_headers (bfd *abfd,
struct bfd_link_info *info ATTRIBUTE_UNUSED)
{
Elf_Internal_Ehdr *i_ehdrp;
i_ehdrp = elf_elfheader (abfd);
i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
#ifdef OLD_FREEBSD_ABI_LABEL
memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
#endif
}
#undef elf_backend_post_process_headers
#define elf_backend_post_process_headers elf_i386_post_process_headers
#undef elf32_bed
#define elf32_bed elf32_i386_fbsd_bed
#include "elf32-target.h"
#undef TARGET_LITTLE_SYM
#define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
#undef ELF_OSABI
static struct bfd_link_hash_table *
elf_i386_vxworks_link_hash_table_create (bfd *abfd)
{
struct bfd_link_hash_table *ret;
struct elf_i386_link_hash_table *htab;
ret = elf_i386_link_hash_table_create (abfd);
if (ret)
{
htab = (struct elf_i386_link_hash_table *) ret;
htab->is_vxworks = 1;
htab->plt0_pad_byte = 0x90;
}
return ret;
}
#undef elf_backend_relocs_compatible
#undef elf_backend_post_process_headers
#undef bfd_elf32_bfd_link_hash_table_create
#define bfd_elf32_bfd_link_hash_table_create \
elf_i386_vxworks_link_hash_table_create
#undef elf_backend_add_symbol_hook
#define elf_backend_add_symbol_hook \
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_emit_relocs
#define elf_backend_emit_relocs elf_vxworks_emit_relocs
#undef elf_backend_final_write_processing
#define elf_backend_final_write_processing \
elf_vxworks_final_write_processing
define it. */
#undef elf_backend_want_plt_sym
#define elf_backend_want_plt_sym 1
#undef elf32_bed
#define elf32_bed elf32_i386_vxworks_bed
#include "elf32-target.h"
