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binutils-gdb/bfd/mach-o-x86-64.c

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/* Intel x86-64 Mach-O support for BFD.
Copyright (C) 2010-2019 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 "libbfd.h"
#include "libiberty.h"
#include "mach-o.h"
#include "mach-o/x86-64.h"
#define bfd_mach_o_object_p bfd_mach_o_x86_64_object_p
#define bfd_mach_o_core_p bfd_mach_o_x86_64_core_p
#define bfd_mach_o_mkobject bfd_mach_o_x86_64_mkobject
static const bfd_target *
bfd_mach_o_x86_64_object_p (bfd *abfd)
{
return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_X86_64);
}
static const bfd_target *
bfd_mach_o_x86_64_core_p (bfd *abfd)
{
return bfd_mach_o_header_p (abfd, 0,
BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_X86_64);
}
static bfd_boolean
bfd_mach_o_x86_64_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_64;
mdata->header.cputype = BFD_MACH_O_CPU_TYPE_X86_64;
mdata->header.cpusubtype =
BFD_MACH_O_CPU_SUBTYPE_X86_ALL | BFD_MACH_O_CPU_SUBTYPE_LIB64;
mdata->header.byteorder = BFD_ENDIAN_LITTLE;
mdata->header.version = 2;
return TRUE;
}
/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
#define MINUS_ONE (~ (bfd_vma) 0)
static reloc_howto_type x86_64_howto_table[]=
{
/* 0 */
HOWTO(BFD_RELOC_64, 0, 4, 64, FALSE, 0,
complain_overflow_bitfield,
NULL, "64",
FALSE, MINUS_ONE, MINUS_ONE, FALSE),
HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0,
complain_overflow_bitfield,
NULL, "32",
FALSE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0,
complain_overflow_bitfield,
NULL, "DISP32",
FALSE, 0xffffffff, 0xffffffff, TRUE),
HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_1, 0, 2, 32, TRUE, 0,
complain_overflow_bitfield,
NULL, "DISP32_1",
FALSE, 0xffffffff, 0xffffffff, TRUE),
/* 4 */
HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_2, 0, 2, 32, TRUE, 0,
complain_overflow_bitfield,
NULL, "DISP32_2",
FALSE, 0xffffffff, 0xffffffff, TRUE),
HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_4, 0, 2, 32, TRUE, 0,
complain_overflow_bitfield,
NULL, "DISP32_4",
FALSE, 0xffffffff, 0xffffffff, TRUE),
HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH32, 0, 2, 32, TRUE, 0,
complain_overflow_bitfield,
NULL, "BRANCH32",
FALSE, 0xffffffff, 0xffffffff, TRUE),
HOWTO(BFD_RELOC_MACH_O_X86_64_GOT_LOAD, 0, 2, 32, TRUE, 0,
complain_overflow_bitfield,
NULL, "GOT_LOAD",
FALSE, 0xffffffff, 0xffffffff, TRUE),
/* 8 */
HOWTO(BFD_RELOC_MACH_O_SUBTRACTOR32, 0, 2, 32, FALSE, 0,
complain_overflow_bitfield,
NULL, "SUBTRACTOR32",
FALSE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(BFD_RELOC_MACH_O_SUBTRACTOR64, 0, 4, 64, FALSE, 0,
complain_overflow_bitfield,
NULL, "SUBTRACTOR64",
FALSE, MINUS_ONE, MINUS_ONE, FALSE),
HOWTO(BFD_RELOC_MACH_O_X86_64_GOT, 0, 2, 32, TRUE, 0,
complain_overflow_bitfield,
NULL, "GOT",
FALSE, 0xffffffff, 0xffffffff, TRUE),
HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH8, 0, 0, 8, TRUE, 0,
complain_overflow_bitfield,
NULL, "BRANCH8",
FALSE, 0xff, 0xff, TRUE),
/* 12 */
HOWTO(BFD_RELOC_MACH_O_X86_64_TLV, 0, 2, 32, TRUE, 0,
complain_overflow_bitfield,
NULL, "TLV",
FALSE, 0xffffffff, 0xffffffff, TRUE),
};
static bfd_boolean
bfd_mach_o_x86_64_canonicalize_one_reloc (bfd * abfd,
struct mach_o_reloc_info_external * raw,
arelent * res,
asymbol ** syms,
arelent * res_base ATTRIBUTE_UNUSED)
{
bfd_mach_o_reloc_info reloc;
if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms))
return FALSE;
/* On x86-64, scattered relocs are not used. */
if (reloc.r_scattered)
return FALSE;
switch (reloc.r_type)
{
case BFD_MACH_O_X86_64_RELOC_UNSIGNED:
if (reloc.r_pcrel)
return FALSE;
switch (reloc.r_length)
{
case 2:
res->howto = &x86_64_howto_table[1];
return TRUE;
case 3:
res->howto = &x86_64_howto_table[0];
return TRUE;
default:
return FALSE;
}
case BFD_MACH_O_X86_64_RELOC_SIGNED:
if (reloc.r_length == 2 && reloc.r_pcrel)
{
res->howto = &x86_64_howto_table[2];
return TRUE;
}
break;
case BFD_MACH_O_X86_64_RELOC_BRANCH:
if (!reloc.r_pcrel)
return FALSE;
switch (reloc.r_length)
{
case 2:
res->howto = &x86_64_howto_table[6];
return TRUE;
default:
return FALSE;
}
break;
case BFD_MACH_O_X86_64_RELOC_GOT_LOAD:
if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern)
{
res->howto = &x86_64_howto_table[7];
return TRUE;
}
break;
case BFD_MACH_O_X86_64_RELOC_GOT:
if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern)
{
res->howto = &x86_64_howto_table[10];
return TRUE;
}
break;
case BFD_MACH_O_X86_64_RELOC_SUBTRACTOR:
if (reloc.r_pcrel)
return FALSE;
switch (reloc.r_length)
{
case 2:
res->howto = &x86_64_howto_table[8];
return TRUE;
case 3:
res->howto = &x86_64_howto_table[9];
return TRUE;
default:
return FALSE;
}
break;
case BFD_MACH_O_X86_64_RELOC_SIGNED_1:
if (reloc.r_length == 2 && reloc.r_pcrel)
{
res->howto = &x86_64_howto_table[3];
return TRUE;
}
break;
case BFD_MACH_O_X86_64_RELOC_SIGNED_2:
if (reloc.r_length == 2 && reloc.r_pcrel)
{
res->howto = &x86_64_howto_table[4];
return TRUE;
}
break;
case BFD_MACH_O_X86_64_RELOC_SIGNED_4:
if (reloc.r_length == 2 && reloc.r_pcrel)
{
res->howto = &x86_64_howto_table[5];
return TRUE;
}
break;
case BFD_MACH_O_X86_64_RELOC_TLV:
if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern)
{
res->howto = &x86_64_howto_table[12];
return TRUE;
}
break;
default:
return FALSE;
}
return FALSE;
}
static bfd_boolean
bfd_mach_o_x86_64_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo)
{
rinfo->r_address = rel->address;
rinfo->r_scattered = 0;
switch (rel->howto->type)
{
case BFD_RELOC_32:
rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED;
rinfo->r_pcrel = 0;
rinfo->r_length = 2;
break;
case BFD_RELOC_64:
rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED;
rinfo->r_pcrel = 0;
rinfo->r_length = 3;
break;
case BFD_RELOC_32_PCREL:
rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED;
rinfo->r_pcrel = 1;
rinfo->r_length = 2;
break;
case BFD_RELOC_MACH_O_X86_64_PCREL32_1:
rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_1;
rinfo->r_pcrel = 1;
rinfo->r_length = 2;
break;
case BFD_RELOC_MACH_O_X86_64_PCREL32_2:
rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_2;
rinfo->r_pcrel = 1;
rinfo->r_length = 2;
break;
case BFD_RELOC_MACH_O_X86_64_PCREL32_4:
rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_4;
rinfo->r_pcrel = 1;
rinfo->r_length = 2;
break;
case BFD_RELOC_MACH_O_X86_64_BRANCH32:
rinfo->r_type = BFD_MACH_O_X86_64_RELOC_BRANCH;
rinfo->r_pcrel = 1;
rinfo->r_length = 2;
break;
case BFD_RELOC_MACH_O_SUBTRACTOR32:
rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SUBTRACTOR;
rinfo->r_pcrel = 0;
rinfo->r_length = 2;
break;
case BFD_RELOC_MACH_O_SUBTRACTOR64:
rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SUBTRACTOR;
rinfo->r_pcrel = 0;
rinfo->r_length = 3;
break;
case BFD_RELOC_MACH_O_X86_64_GOT:
rinfo->r_type = BFD_MACH_O_X86_64_RELOC_GOT;
rinfo->r_pcrel = 1;
rinfo->r_length = 2;
break;
case BFD_RELOC_MACH_O_X86_64_GOT_LOAD:
rinfo->r_type = BFD_MACH_O_X86_64_RELOC_GOT_LOAD;
rinfo->r_pcrel = 1;
rinfo->r_length = 2;
break;
case BFD_RELOC_MACH_O_X86_64_TLV:
rinfo->r_type = BFD_MACH_O_X86_64_RELOC_TLV;
rinfo->r_pcrel = 1;
rinfo->r_length = 2;
break;
default:
return FALSE;
}
if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM)
{
rinfo->r_extern = 0;
rinfo->r_value =
(*rel->sym_ptr_ptr)->section->output_section->target_index;
}
else
{
rinfo->r_extern = 1;
rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i;
}
return TRUE;
}
static reloc_howto_type *
bfd_mach_o_x86_64_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
unsigned int i;
for (i = 0;
i < sizeof (x86_64_howto_table) / sizeof (*x86_64_howto_table);
i++)
if (code == x86_64_howto_table[i].type)
return &x86_64_howto_table[i];
return NULL;
}
static reloc_howto_type *
bfd_mach_o_x86_64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
const char *name ATTRIBUTE_UNUSED)
{
return NULL;
}
static bfd_boolean
bfd_mach_o_section_type_valid_for_x86_64 (unsigned long val)
{
if (val == BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS
|| val == BFD_MACH_O_S_LAZY_SYMBOL_POINTERS
|| val == BFD_MACH_O_S_SYMBOL_STUBS)
return FALSE;
return TRUE;
}
/* We want to bump the alignment of some sections. */
static const mach_o_section_name_xlat text_section_names_xlat[] =
{
{ ".eh_frame", "__eh_frame",
SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
BFD_MACH_O_S_ATTR_LIVE_SUPPORT
| BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
| BFD_MACH_O_S_ATTR_NO_TOC, 3},
{ NULL, NULL, 0, 0, 0, 0}
};
const mach_o_segment_name_xlat mach_o_x86_64_segsec_names_xlat[] =
{
{ "__TEXT", text_section_names_xlat },
{ NULL, NULL }
};
#define bfd_mach_o_canonicalize_one_reloc bfd_mach_o_x86_64_canonicalize_one_reloc
#define bfd_mach_o_swap_reloc_out bfd_mach_o_x86_64_swap_reloc_out
#define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_x86_64_bfd_reloc_type_lookup
#define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_x86_64_bfd_reloc_name_lookup
#define bfd_mach_o_print_thread NULL
#define bfd_mach_o_tgt_seg_table mach_o_x86_64_segsec_names_xlat
#define bfd_mach_o_section_type_valid_for_tgt bfd_mach_o_section_type_valid_for_x86_64
#define TARGET_NAME x86_64_mach_o_vec
#define TARGET_STRING "mach-o-x86-64"
#define TARGET_ARCHITECTURE bfd_arch_i386
#define TARGET_PAGESIZE 4096
#define TARGET_BIG_ENDIAN 0
#define TARGET_ARCHIVE 0
#define TARGET_PRIORITY 0
#include "mach-o-target.c"
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