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/* AArch-64 Mach-O support for BFD.
Copyright (C) 2015-2023 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/arm64.h"
#define bfd_mach_o_object_p bfd_mach_o_arm64_object_p
#define bfd_mach_o_core_p bfd_mach_o_arm64_core_p
#define bfd_mach_o_mkobject bfd_mach_o_arm64_mkobject
#define bfd_mach_o_canonicalize_one_reloc \
bfd_mach_o_arm64_canonicalize_one_reloc
#define bfd_mach_o_swap_reloc_out NULL
#define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_arm64_bfd_reloc_type_lookup
#define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_arm64_bfd_reloc_name_lookup
#define bfd_mach_o_print_thread NULL
#define bfd_mach_o_tgt_seg_table NULL
#define bfd_mach_o_section_type_valid_for_tgt NULL
static bfd_cleanup
bfd_mach_o_arm64_object_p (bfd *abfd)
{
return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_ARM64);
}
static bfd_cleanup
bfd_mach_o_arm64_core_p (bfd *abfd)
{
return bfd_mach_o_header_p (abfd, 0,
BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_ARM64);
}
static bool
bfd_mach_o_arm64_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_ARM64;
mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_ARM64_ALL;
mdata->header.byteorder = BFD_ENDIAN_LITTLE;
mdata->header.version = 1;
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 arm64_howto_table[]=
{
/* 0 */
HOWTO (BFD_RELOC_64, 0, 8, 64, false, 0,
complain_overflow_bitfield,
NULL, "64",
false, MINUS_ONE, MINUS_ONE, false),
HOWTO (BFD_RELOC_32, 0, 4, 32, false, 0,
complain_overflow_bitfield,
NULL, "32",
false, 0xffffffff, 0xffffffff, false),
HOWTO (BFD_RELOC_16, 0, 2, 16, false, 0,
complain_overflow_bitfield,
NULL, "16",
false, 0xffff, 0xffff, false),
HOWTO (BFD_RELOC_8, 0, 1, 8, false, 0,
complain_overflow_bitfield,
NULL, "8",
false, 0xff, 0xff, false),
/* 4 */
HOWTO (BFD_RELOC_64_PCREL, 0, 8, 64, true, 0,
complain_overflow_bitfield,
NULL, "DISP64",
false, MINUS_ONE, MINUS_ONE, true),
HOWTO (BFD_RELOC_32_PCREL, 0, 4, 32, true, 0,
complain_overflow_bitfield,
NULL, "DISP32",
false, 0xffffffff, 0xffffffff, true),
HOWTO (BFD_RELOC_16_PCREL, 0, 2, 16, true, 0,
complain_overflow_bitfield,
NULL, "DISP16",
false, 0xffff, 0xffff, true),
HOWTO (BFD_RELOC_AARCH64_CALL26, 0, 4, 26, true, 0,
complain_overflow_bitfield,
NULL, "BRANCH26",
false, 0x03ffffff, 0x03ffffff, true),
/* 8 */
HOWTO (BFD_RELOC_AARCH64_ADR_HI21_PCREL, 12, 4, 21, true, 0,
complain_overflow_signed,
NULL, "PAGE21",
false, 0x1fffff, 0x1fffff, true),
HOWTO (BFD_RELOC_AARCH64_LDST16_LO12, 1, 4, 12, true, 0,
complain_overflow_signed,
NULL, "PGOFF12",
false, 0xffe, 0xffe, true),
HOWTO (BFD_RELOC_MACH_O_ARM64_ADDEND, 0, 4, 32, false, 0,
complain_overflow_signed,
NULL, "ADDEND",
false, 0xffffffff, 0xffffffff, false),
HOWTO (BFD_RELOC_MACH_O_SUBTRACTOR32, 0, 4, 32, false, 0,
complain_overflow_bitfield,
NULL, "SUBTRACTOR32",
false, 0xffffffff, 0xffffffff, false),
/* 12 */
HOWTO (BFD_RELOC_MACH_O_SUBTRACTOR64, 0, 8, 64, false, 0,
complain_overflow_bitfield,
NULL, "SUBTRACTOR64",
false, MINUS_ONE, MINUS_ONE, false),
HOWTO (BFD_RELOC_MACH_O_ARM64_GOT_LOAD_PAGE21, 12, 4, 21, true, 0,
complain_overflow_signed,
NULL, "GOT_LD_PG21",
false, 0x1fffff, 0x1fffff, true),
HOWTO (BFD_RELOC_MACH_O_ARM64_GOT_LOAD_PAGEOFF12, 1, 4, 12, true, 0,
complain_overflow_signed,
NULL, "GOT_LD_PGOFF12",
false, 0xffe, 0xffe, true),
HOWTO (BFD_RELOC_MACH_O_ARM64_POINTER_TO_GOT, 0, 4, 32, true, 0,
complain_overflow_bitfield,
NULL, "PTR_TO_GOT",
false, 0xffffffff, 0xffffffff, true),
};
static bool
bfd_mach_o_arm64_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;
res->address = bfd_get_32 (abfd, raw->r_address);
if (res->address & BFD_MACH_O_SR_SCATTERED)
{
/* Only non-scattered relocations. */
return false;
}
/* The value and info fields have to be extracted dependent on target
endian-ness. */
bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
if (reloc.r_type == BFD_MACH_O_ARM64_RELOC_ADDEND)
{
if (reloc.r_length == 2 && reloc.r_pcrel == 0)
{
res->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
res->addend = reloc.r_value;
res->howto = &arm64_howto_table[10];
return true;
}
return false;
}
if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, &reloc, res, syms))
return false;
switch (reloc.r_type)
{
case BFD_MACH_O_ARM64_RELOC_UNSIGNED:
switch ((reloc.r_length << 1) | reloc.r_pcrel)
{
case 0: /* len = 0, pcrel = 0 */
res->howto = &arm64_howto_table[3];
return true;
case 2: /* len = 1, pcrel = 0 */
res->howto = &arm64_howto_table[2];
return true;
case 3: /* len = 1, pcrel = 1 */
res->howto = &arm64_howto_table[6];
return true;
case 4: /* len = 2, pcrel = 0 */
res->howto = &arm64_howto_table[1];
return true;
case 5: /* len = 2, pcrel = 1 */
res->howto = &arm64_howto_table[5];
return true;
case 6: /* len = 3, pcrel = 0 */
res->howto = &arm64_howto_table[0];
return true;
case 7: /* len = 3, pcrel = 1 */
res->howto = &arm64_howto_table[4];
return true;
default:
return false;
}
break;
case BFD_MACH_O_ARM64_RELOC_SUBTRACTOR:
if (reloc.r_pcrel)
return false;
switch (reloc.r_length)
{
case 2:
res->howto = &arm64_howto_table[11];
return true;
case 3:
res->howto = &arm64_howto_table[12];
return true;
default:
return false;
}
break;
case BFD_MACH_O_ARM64_RELOC_BRANCH26:
if (reloc.r_length == 2 && reloc.r_pcrel == 1)
{
res->howto = &arm64_howto_table[7];
return true;
}
break;
case BFD_MACH_O_ARM64_RELOC_PAGE21:
if (reloc.r_length == 2 && reloc.r_pcrel == 1)
{
res->howto = &arm64_howto_table[8];
return true;
}
break;
case BFD_MACH_O_ARM64_RELOC_PAGEOFF12:
if (reloc.r_length == 2 && reloc.r_pcrel == 0)
{
res->howto = &arm64_howto_table[9];
return true;
}
break;
case BFD_MACH_O_ARM64_RELOC_GOT_LOAD_PAGE21:
if (reloc.r_length == 2 && reloc.r_pcrel == 1)
{
res->howto = &arm64_howto_table[13];
return true;
}
break;
case BFD_MACH_O_ARM64_RELOC_GOT_LOAD_PAGEOFF12:
if (reloc.r_length == 2 && reloc.r_pcrel == 0)
{
res->howto = &arm64_howto_table[14];
return true;
}
break;
case BFD_MACH_O_ARM64_RELOC_POINTER_TO_GOT:
if (reloc.r_length == 2 && reloc.r_pcrel == 1)
{
res->howto = &arm64_howto_table[15];
return true;
}
break;
default:
break;
}
return false;
}
static reloc_howto_type *
bfd_mach_o_arm64_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
unsigned int i;
for (i = 0;
i < sizeof (arm64_howto_table) / sizeof (*arm64_howto_table);
i++)
if (code == arm64_howto_table[i].type)
return &arm64_howto_table[i];
return NULL;
}
static reloc_howto_type *
bfd_mach_o_arm64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
const char *name ATTRIBUTE_UNUSED)
{
return NULL;
}
#define TARGET_NAME aarch64_mach_o_vec
#define TARGET_STRING "mach-o-arm64"
#define TARGET_ARCHITECTURE bfd_arch_aarch64
#define TARGET_PAGESIZE 4096
#define TARGET_BIG_ENDIAN 0
#define TARGET_ARCHIVE 0
#define TARGET_PRIORITY 0
#include "mach-o-target.c"
#undef TARGET_NAME
#undef TARGET_STRING
#undef TARGET_ARCHIVE
#undef TARGET_PRIORITY
|
