311 lines
8.5 KiB
C
311 lines
8.5 KiB
C
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/* AArch-64 Mach-O support for BFD.
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Copyright (C) 2015-2022 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "libiberty.h"
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#include "mach-o.h"
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#include "mach-o/arm64.h"
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#define bfd_mach_o_object_p bfd_mach_o_arm64_object_p
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#define bfd_mach_o_core_p bfd_mach_o_arm64_core_p
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#define bfd_mach_o_mkobject bfd_mach_o_arm64_mkobject
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#define bfd_mach_o_canonicalize_one_reloc \
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bfd_mach_o_arm64_canonicalize_one_reloc
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#define bfd_mach_o_swap_reloc_out NULL
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#define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_arm64_bfd_reloc_type_lookup
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#define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_arm64_bfd_reloc_name_lookup
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#define bfd_mach_o_print_thread NULL
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#define bfd_mach_o_tgt_seg_table NULL
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#define bfd_mach_o_section_type_valid_for_tgt NULL
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static bfd_cleanup
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bfd_mach_o_arm64_object_p (bfd *abfd)
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{
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return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_ARM64);
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}
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static bfd_cleanup
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bfd_mach_o_arm64_core_p (bfd *abfd)
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{
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return bfd_mach_o_header_p (abfd, 0,
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BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_ARM64);
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}
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static bool
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bfd_mach_o_arm64_mkobject (bfd *abfd)
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{
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bfd_mach_o_data_struct *mdata;
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if (!bfd_mach_o_mkobject_init (abfd))
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return false;
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mdata = bfd_mach_o_get_data (abfd);
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mdata->header.magic = BFD_MACH_O_MH_MAGIC;
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mdata->header.cputype = BFD_MACH_O_CPU_TYPE_ARM64;
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mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_ARM64_ALL;
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mdata->header.byteorder = BFD_ENDIAN_LITTLE;
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mdata->header.version = 1;
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return true;
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}
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/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
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#define MINUS_ONE (~ (bfd_vma) 0)
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static reloc_howto_type arm64_howto_table[]=
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{
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/* 0 */
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HOWTO (BFD_RELOC_64, 0, 4, 64, false, 0,
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complain_overflow_bitfield,
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NULL, "64",
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false, MINUS_ONE, MINUS_ONE, false),
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HOWTO (BFD_RELOC_32, 0, 2, 32, false, 0,
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complain_overflow_bitfield,
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NULL, "32",
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false, 0xffffffff, 0xffffffff, false),
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HOWTO (BFD_RELOC_16, 0, 1, 16, false, 0,
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complain_overflow_bitfield,
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NULL, "16",
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false, 0xffff, 0xffff, false),
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HOWTO (BFD_RELOC_8, 0, 0, 8, false, 0,
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complain_overflow_bitfield,
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NULL, "8",
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false, 0xff, 0xff, false),
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/* 4 */
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HOWTO (BFD_RELOC_64_PCREL, 0, 4, 64, true, 0,
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complain_overflow_bitfield,
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NULL, "DISP64",
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false, MINUS_ONE, MINUS_ONE, true),
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HOWTO (BFD_RELOC_32_PCREL, 0, 2, 32, true, 0,
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complain_overflow_bitfield,
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NULL, "DISP32",
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false, 0xffffffff, 0xffffffff, true),
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HOWTO (BFD_RELOC_16_PCREL, 0, 1, 16, true, 0,
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complain_overflow_bitfield,
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NULL, "DISP16",
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false, 0xffff, 0xffff, true),
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HOWTO (BFD_RELOC_AARCH64_CALL26, 0, 2, 26, true, 0,
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complain_overflow_bitfield,
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NULL, "BRANCH26",
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false, 0x03ffffff, 0x03ffffff, true),
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/* 8 */
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HOWTO (BFD_RELOC_AARCH64_ADR_HI21_PCREL, 12, 2, 21, true, 0,
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complain_overflow_signed,
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NULL, "PAGE21",
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false, 0x1fffff, 0x1fffff, true),
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HOWTO (BFD_RELOC_AARCH64_LDST16_LO12, 1, 2, 12, true, 0,
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complain_overflow_signed,
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NULL, "PGOFF12",
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false, 0xffe, 0xffe, true),
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HOWTO (BFD_RELOC_MACH_O_ARM64_ADDEND, 0, 2, 32, false, 0,
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complain_overflow_signed,
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NULL, "ADDEND",
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false, 0xffffffff, 0xffffffff, false),
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HOWTO (BFD_RELOC_MACH_O_SUBTRACTOR32, 0, 2, 32, false, 0,
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complain_overflow_bitfield,
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NULL, "SUBTRACTOR32",
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false, 0xffffffff, 0xffffffff, false),
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/* 12 */
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HOWTO (BFD_RELOC_MACH_O_SUBTRACTOR64, 0, 4, 64, false, 0,
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complain_overflow_bitfield,
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NULL, "SUBTRACTOR64",
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false, MINUS_ONE, MINUS_ONE, false),
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HOWTO (BFD_RELOC_MACH_O_ARM64_GOT_LOAD_PAGE21, 12, 2, 21, true, 0,
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complain_overflow_signed,
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NULL, "GOT_LD_PG21",
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false, 0x1fffff, 0x1fffff, true),
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HOWTO (BFD_RELOC_MACH_O_ARM64_GOT_LOAD_PAGEOFF12, 1, 2, 12, true, 0,
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complain_overflow_signed,
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NULL, "GOT_LD_PGOFF12",
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false, 0xffe, 0xffe, true),
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HOWTO (BFD_RELOC_MACH_O_ARM64_POINTER_TO_GOT, 0, 2, 32, true, 0,
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complain_overflow_bitfield,
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NULL, "PTR_TO_GOT",
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false, 0xffffffff, 0xffffffff, true),
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};
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static bool
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bfd_mach_o_arm64_canonicalize_one_reloc (bfd * abfd,
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struct mach_o_reloc_info_external * raw,
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arelent * res,
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asymbol ** syms,
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arelent * res_base ATTRIBUTE_UNUSED)
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{
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bfd_mach_o_reloc_info reloc;
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res->address = bfd_get_32 (abfd, raw->r_address);
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if (res->address & BFD_MACH_O_SR_SCATTERED)
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{
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/* Only non-scattered relocations. */
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return false;
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}
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/* The value and info fields have to be extracted dependent on target
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endian-ness. */
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bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
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if (reloc.r_type == BFD_MACH_O_ARM64_RELOC_ADDEND)
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{
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if (reloc.r_length == 2 && reloc.r_pcrel == 0)
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{
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res->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
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res->addend = reloc.r_value;
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res->howto = &arm64_howto_table[10];
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return true;
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}
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return false;
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}
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if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, &reloc, res, syms))
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return false;
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switch (reloc.r_type)
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{
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case BFD_MACH_O_ARM64_RELOC_UNSIGNED:
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switch ((reloc.r_length << 1) | reloc.r_pcrel)
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{
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case 0: /* len = 0, pcrel = 0 */
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res->howto = &arm64_howto_table[3];
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return true;
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case 2: /* len = 1, pcrel = 0 */
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res->howto = &arm64_howto_table[2];
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return true;
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case 3: /* len = 1, pcrel = 1 */
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res->howto = &arm64_howto_table[6];
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return true;
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case 4: /* len = 2, pcrel = 0 */
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res->howto = &arm64_howto_table[1];
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return true;
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case 5: /* len = 2, pcrel = 1 */
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res->howto = &arm64_howto_table[5];
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return true;
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case 6: /* len = 3, pcrel = 0 */
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res->howto = &arm64_howto_table[0];
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return true;
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case 7: /* len = 3, pcrel = 1 */
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res->howto = &arm64_howto_table[4];
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return true;
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default:
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return false;
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}
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break;
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case BFD_MACH_O_ARM64_RELOC_SUBTRACTOR:
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if (reloc.r_pcrel)
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return false;
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switch (reloc.r_length)
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{
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case 2:
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res->howto = &arm64_howto_table[11];
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return true;
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case 3:
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res->howto = &arm64_howto_table[12];
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return true;
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default:
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return false;
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}
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break;
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case BFD_MACH_O_ARM64_RELOC_BRANCH26:
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if (reloc.r_length == 2 && reloc.r_pcrel == 1)
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{
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res->howto = &arm64_howto_table[7];
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return true;
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}
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break;
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case BFD_MACH_O_ARM64_RELOC_PAGE21:
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if (reloc.r_length == 2 && reloc.r_pcrel == 1)
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{
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res->howto = &arm64_howto_table[8];
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return true;
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}
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break;
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case BFD_MACH_O_ARM64_RELOC_PAGEOFF12:
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if (reloc.r_length == 2 && reloc.r_pcrel == 0)
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{
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res->howto = &arm64_howto_table[9];
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return true;
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}
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break;
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case BFD_MACH_O_ARM64_RELOC_GOT_LOAD_PAGE21:
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if (reloc.r_length == 2 && reloc.r_pcrel == 1)
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{
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res->howto = &arm64_howto_table[13];
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return true;
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}
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break;
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case BFD_MACH_O_ARM64_RELOC_GOT_LOAD_PAGEOFF12:
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if (reloc.r_length == 2 && reloc.r_pcrel == 0)
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{
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res->howto = &arm64_howto_table[14];
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return true;
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}
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break;
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case BFD_MACH_O_ARM64_RELOC_POINTER_TO_GOT:
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if (reloc.r_length == 2 && reloc.r_pcrel == 1)
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{
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res->howto = &arm64_howto_table[15];
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return true;
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}
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break;
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default:
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break;
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}
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return false;
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}
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static reloc_howto_type *
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bfd_mach_o_arm64_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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bfd_reloc_code_real_type code)
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{
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unsigned int i;
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for (i = 0;
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i < sizeof (arm64_howto_table) / sizeof (*arm64_howto_table);
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i++)
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if (code == arm64_howto_table[i].type)
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return &arm64_howto_table[i];
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return NULL;
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}
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static reloc_howto_type *
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bfd_mach_o_arm64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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const char *name ATTRIBUTE_UNUSED)
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{
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return NULL;
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}
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#define TARGET_NAME aarch64_mach_o_vec
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#define TARGET_STRING "mach-o-arm64"
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#define TARGET_ARCHITECTURE bfd_arch_aarch64
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#define TARGET_PAGESIZE 4096
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#define TARGET_BIG_ENDIAN 0
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#define TARGET_ARCHIVE 0
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#define TARGET_PRIORITY 0
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#include "mach-o-target.c"
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#undef TARGET_NAME
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#undef TARGET_STRING
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#undef TARGET_ARCHIVE
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#undef TARGET_PRIORITY
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