404 lines
13 KiB
C
404 lines
13 KiB
C
/* Intel i386 Mach-O support for BFD.
|
|
Copyright 2009
|
|
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 "mach-o.h"
|
|
#include "bfd.h"
|
|
#include "libbfd.h"
|
|
#include "libiberty.h"
|
|
#include "mach-o/reloc.h"
|
|
|
|
#define bfd_mach_o_object_p bfd_mach_o_i386_object_p
|
|
#define bfd_mach_o_core_p bfd_mach_o_i386_core_p
|
|
#define bfd_mach_o_mkobject bfd_mach_o_i386_mkobject
|
|
|
|
static const bfd_target *
|
|
bfd_mach_o_i386_object_p (bfd *abfd)
|
|
{
|
|
return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_CPU_TYPE_I386);
|
|
}
|
|
|
|
static const bfd_target *
|
|
bfd_mach_o_i386_core_p (bfd *abfd)
|
|
{
|
|
return bfd_mach_o_header_p (abfd,
|
|
BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_I386);
|
|
}
|
|
|
|
static bfd_boolean
|
|
bfd_mach_o_i386_mkobject (bfd *abfd)
|
|
{
|
|
bfd_mach_o_data_struct *mdata;
|
|
|
|
if (!bfd_mach_o_mkobject_init (abfd))
|
|
return FALSE;
|
|
|
|
mdata = bfd_mach_o_get_data (abfd);
|
|
mdata->header.magic = BFD_MACH_O_MH_MAGIC;
|
|
mdata->header.cputype = BFD_MACH_O_CPU_TYPE_I386;
|
|
mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_X86_ALL;
|
|
mdata->header.byteorder = BFD_ENDIAN_LITTLE;
|
|
mdata->header.version = 1;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static reloc_howto_type i386_howto_table[]=
|
|
{
|
|
/* 0 */
|
|
HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0,
|
|
complain_overflow_bitfield,
|
|
NULL, "32",
|
|
FALSE, 0xffffffff, 0xffffffff, FALSE),
|
|
HOWTO(BFD_RELOC_16, 0, 1, 16, FALSE, 0,
|
|
complain_overflow_bitfield,
|
|
NULL, "16",
|
|
FALSE, 0xffff, 0xffff, FALSE),
|
|
HOWTO(BFD_RELOC_8, 0, 0, 8, FALSE, 0,
|
|
complain_overflow_bitfield,
|
|
NULL, "8",
|
|
FALSE, 0xff, 0xff, FALSE),
|
|
HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0,
|
|
complain_overflow_bitfield,
|
|
NULL, "DISP32",
|
|
FALSE, 0xffffffff, 0xffffffff, TRUE),
|
|
/* 4 */
|
|
HOWTO(BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0,
|
|
complain_overflow_bitfield,
|
|
NULL, "DISP16",
|
|
FALSE, 0xffff, 0xffff, TRUE),
|
|
HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 32, FALSE, 0,
|
|
complain_overflow_bitfield,
|
|
NULL, "SECTDIFF_32",
|
|
FALSE, 0xffffffff, 0xffffffff, FALSE),
|
|
HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 2, 32, FALSE, 0,
|
|
complain_overflow_bitfield,
|
|
NULL, "LSECTDIFF_32",
|
|
FALSE, 0xffffffff, 0xffffffff, FALSE),
|
|
HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 2, 32, FALSE, 0,
|
|
complain_overflow_bitfield,
|
|
NULL, "PAIR_32",
|
|
FALSE, 0xffffffff, 0xffffffff, FALSE),
|
|
/* 8 */
|
|
HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 1, 16, FALSE, 0,
|
|
complain_overflow_bitfield,
|
|
NULL, "SECTDIFF_16",
|
|
FALSE, 0xffff, 0xffff, FALSE),
|
|
HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 1, 16, FALSE, 0,
|
|
complain_overflow_bitfield,
|
|
NULL, "LSECTDIFF_16",
|
|
FALSE, 0xffff, 0xffff, FALSE),
|
|
HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 1, 16, FALSE, 0,
|
|
complain_overflow_bitfield,
|
|
NULL, "PAIR_16",
|
|
FALSE, 0xffff, 0xffff, FALSE),
|
|
};
|
|
|
|
static bfd_boolean
|
|
bfd_mach_o_i386_swap_reloc_in (arelent *res, bfd_mach_o_reloc_info *reloc)
|
|
{
|
|
if (reloc->r_scattered)
|
|
{
|
|
switch (reloc->r_type)
|
|
{
|
|
case BFD_MACH_O_GENERIC_RELOC_PAIR:
|
|
if (reloc->r_length == 2)
|
|
{
|
|
res->howto = &i386_howto_table[7];
|
|
res->address = res[-1].address;
|
|
return TRUE;
|
|
}
|
|
else if (reloc->r_length == 1)
|
|
{
|
|
res->howto = &i386_howto_table[10];
|
|
res->address = res[-1].address;
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
case BFD_MACH_O_GENERIC_RELOC_SECTDIFF:
|
|
if (reloc->r_length == 2)
|
|
{
|
|
res->howto = &i386_howto_table[5];
|
|
return TRUE;
|
|
}
|
|
else if (reloc->r_length == 1)
|
|
{
|
|
res->howto = &i386_howto_table[8];
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
case BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF:
|
|
if (reloc->r_length == 2)
|
|
{
|
|
res->howto = &i386_howto_table[6];
|
|
return TRUE;
|
|
}
|
|
else if (reloc->r_length == 1)
|
|
{
|
|
res->howto = &i386_howto_table[9];
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
switch (reloc->r_type)
|
|
{
|
|
case BFD_MACH_O_GENERIC_RELOC_VANILLA:
|
|
switch ((reloc->r_length << 1) | reloc->r_pcrel)
|
|
{
|
|
case 0: /* len = 0, pcrel = 0 */
|
|
res->howto = &i386_howto_table[2];
|
|
return TRUE;
|
|
case 2: /* len = 1, pcrel = 0 */
|
|
res->howto = &i386_howto_table[1];
|
|
return TRUE;
|
|
case 3: /* len = 1, pcrel = 1 */
|
|
res->howto = &i386_howto_table[4];
|
|
return TRUE;
|
|
case 4: /* len = 2, pcrel = 0 */
|
|
res->howto = &i386_howto_table[0];
|
|
return TRUE;
|
|
case 5: /* len = 2, pcrel = 1 */
|
|
res->howto = &i386_howto_table[3];
|
|
return TRUE;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
break;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
static bfd_boolean
|
|
bfd_mach_o_i386_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo)
|
|
{
|
|
rinfo->r_address = rel->address;
|
|
switch (rel->howto->type)
|
|
{
|
|
case BFD_RELOC_32:
|
|
case BFD_RELOC_32_PCREL:
|
|
case BFD_RELOC_16:
|
|
case BFD_RELOC_16_PCREL:
|
|
case BFD_RELOC_8:
|
|
rinfo->r_scattered = 0;
|
|
rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_VANILLA;
|
|
rinfo->r_pcrel = rel->howto->pc_relative;
|
|
rinfo->r_length = rel->howto->size; /* Correct in practice. */
|
|
if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM)
|
|
{
|
|
rinfo->r_extern = 0;
|
|
rinfo->r_value = (*rel->sym_ptr_ptr)->section->target_index;
|
|
}
|
|
else
|
|
{
|
|
rinfo->r_extern = 1;
|
|
rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i;
|
|
}
|
|
break;
|
|
case BFD_RELOC_MACH_O_SECTDIFF:
|
|
rinfo->r_scattered = 1;
|
|
rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_SECTDIFF;
|
|
rinfo->r_pcrel = 0;
|
|
rinfo->r_length = rel->howto->size;
|
|
rinfo->r_extern = 0;
|
|
rinfo->r_value = rel->addend;
|
|
break;
|
|
case BFD_RELOC_MACH_O_LOCAL_SECTDIFF:
|
|
rinfo->r_scattered = 1;
|
|
rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF;
|
|
rinfo->r_pcrel = 0;
|
|
rinfo->r_length = rel->howto->size;
|
|
rinfo->r_extern = 0;
|
|
rinfo->r_value = rel->addend;
|
|
break;
|
|
case BFD_RELOC_MACH_O_PAIR:
|
|
rinfo->r_address = 0;
|
|
rinfo->r_scattered = 1;
|
|
rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_PAIR;
|
|
rinfo->r_pcrel = 0;
|
|
rinfo->r_length = rel->howto->size;
|
|
rinfo->r_extern = 0;
|
|
rinfo->r_value = rel->addend;
|
|
break;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static reloc_howto_type *
|
|
bfd_mach_o_i386_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
bfd_reloc_code_real_type code)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < sizeof (i386_howto_table) / sizeof (*i386_howto_table); i++)
|
|
if (code == i386_howto_table[i].type)
|
|
return &i386_howto_table[i];
|
|
return NULL;
|
|
}
|
|
|
|
static reloc_howto_type *
|
|
bfd_mach_o_i386_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
const char *name ATTRIBUTE_UNUSED)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static bfd_boolean
|
|
bfd_mach_o_i386_print_thread (bfd *abfd, bfd_mach_o_thread_flavour *thread,
|
|
void *vfile, char *buf)
|
|
{
|
|
FILE *file = (FILE *)vfile;
|
|
|
|
switch (thread->flavour)
|
|
{
|
|
case BFD_MACH_O_x86_THREAD_STATE:
|
|
if (thread->size < (8 + 16 * 4))
|
|
return FALSE;
|
|
fprintf (file, " x86_THREAD_STATE:\n");
|
|
fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
|
|
(unsigned long)bfd_get_32 (abfd, buf + 0),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 4));
|
|
fprintf (file, " eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n",
|
|
(unsigned long)bfd_get_32 (abfd, buf + 8),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 12),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 16),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 20));
|
|
fprintf (file, " edi: %08lx esi: %08lx ebp: %08lx esp: %08lx\n",
|
|
(unsigned long)bfd_get_32 (abfd, buf + 24),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 28),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 32),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 36));
|
|
fprintf (file, " ss: %08lx flg: %08lx eip: %08lx cs: %08lx\n",
|
|
(unsigned long)bfd_get_32 (abfd, buf + 40),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 44),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 48),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 52));
|
|
fprintf (file, " ds: %08lx es: %08lx fs: %08lx gs: %08lx\n",
|
|
(unsigned long)bfd_get_32 (abfd, buf + 56),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 60),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 64),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 68));
|
|
return TRUE;
|
|
case BFD_MACH_O_x86_FLOAT_STATE:
|
|
if (thread->size < 8)
|
|
return FALSE;
|
|
fprintf (file, " x86_FLOAT_STATE:\n");
|
|
fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
|
|
(unsigned long)bfd_get_32 (abfd, buf + 0),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 4));
|
|
return TRUE;
|
|
case BFD_MACH_O_x86_EXCEPTION_STATE:
|
|
if (thread->size < 8 + 3 * 4)
|
|
return FALSE;
|
|
fprintf (file, " x86_EXCEPTION_STATE:\n");
|
|
fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
|
|
(unsigned long)bfd_get_32 (abfd, buf + 0),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 4));
|
|
fprintf (file, " trapno: %08lx err: %08lx faultaddr: %08lx\n",
|
|
(unsigned long)bfd_get_32 (abfd, buf + 8),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 12),
|
|
(unsigned long)bfd_get_32 (abfd, buf + 16));
|
|
return TRUE;
|
|
default:
|
|
break;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
static const mach_o_section_name_xlat text_section_names_xlat[] =
|
|
{
|
|
{ ".symbol_stub", "__symbol_stub",
|
|
SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
|
|
BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
|
|
0},
|
|
{ ".picsymbol_stub", "__picsymbol_stub",
|
|
SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
|
|
BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
|
|
0},
|
|
{ NULL, NULL, 0, 0, 0, 0}
|
|
};
|
|
|
|
static const mach_o_section_name_xlat data_section_names_xlat[] =
|
|
{
|
|
/* The first two are recognized by i386, but not emitted for x86 by
|
|
modern GCC. */
|
|
{ ".non_lazy_symbol_pointer", "__nl_symbol_ptr",
|
|
SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
|
|
BFD_MACH_O_S_ATTR_NONE, 2},
|
|
{ ".lazy_symbol_pointer", "__la_symbol_ptr",
|
|
SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
|
|
BFD_MACH_O_S_ATTR_NONE, 2},
|
|
{ ".lazy_symbol_pointer2", "__la_sym_ptr2",
|
|
SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
|
|
BFD_MACH_O_S_ATTR_NONE, 2},
|
|
{ ".lazy_symbol_pointer3", "__la_sym_ptr3",
|
|
SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
|
|
BFD_MACH_O_S_ATTR_NONE, 2},
|
|
{ NULL, NULL, 0, 0, 0, 0}
|
|
};
|
|
|
|
static const mach_o_section_name_xlat import_section_names_xlat[] =
|
|
{
|
|
{ ".picsymbol_stub3", "__jump_table",
|
|
SEC_CODE | SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
|
|
BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
|
|
| BFD_MACH_O_S_SELF_MODIFYING_CODE,
|
|
6},
|
|
{ ".non_lazy_symbol_pointer_x86", "__pointers",
|
|
SEC_DATA | SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
|
|
BFD_MACH_O_S_ATTR_NONE, 2},
|
|
{ NULL, NULL, 0, 0, 0, 0}
|
|
};
|
|
|
|
const mach_o_segment_name_xlat mach_o_i386_segsec_names_xlat[] =
|
|
{
|
|
{ "__TEXT", text_section_names_xlat },
|
|
{ "__DATA", data_section_names_xlat },
|
|
{ "__IMPORT", import_section_names_xlat },
|
|
{ NULL, NULL }
|
|
};
|
|
|
|
#define bfd_mach_o_swap_reloc_in bfd_mach_o_i386_swap_reloc_in
|
|
#define bfd_mach_o_swap_reloc_out bfd_mach_o_i386_swap_reloc_out
|
|
#define bfd_mach_o_print_thread bfd_mach_o_i386_print_thread
|
|
|
|
#define bfd_mach_o_tgt_seg_table mach_o_i386_segsec_names_xlat
|
|
#define bfd_mach_o_section_type_valid_for_tgt NULL
|
|
|
|
#define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_i386_bfd_reloc_type_lookup
|
|
#define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_i386_bfd_reloc_name_lookup
|
|
|
|
#define TARGET_NAME mach_o_i386_vec
|
|
#define TARGET_STRING "mach-o-i386"
|
|
#define TARGET_ARCHITECTURE bfd_arch_i386
|
|
#define TARGET_BIG_ENDIAN 0
|
|
#define TARGET_ARCHIVE 0
|
|
#define TARGET_PRIORITY 0
|
|
#include "mach-o-target.c"
|