cb001c0d28
The object_p (and archive_p, core_file_p) functions are not supposed to have any target specific malloc'd memory attached to the bfd on their return. This should be obvious on a failure return, but it's also true for a successful return. The reason is that even though the object_p recognises the file, that particular target may not be used and thus the bfd won't be closed calling close_and_cleanup for the target that allocated the memory. It turns out that the object_p bfd_target* return value isn't needed. In all cases except ld/plugin.c the target is abfd->xvec and with ld/plugin.c the target isn't used. So this patch returns a cleanup function from object_p instead, called in bfd_check_format_matches to tidy the bfd before trying a different target match. The only cleanup that does anything at this stage is the alpha-vms one. bfd/ * targets.c (bfd_cleanup): New typedef. (struct bfd <_bfd_check_format>): Return a bfd_cleanup. * libbfd-in.h (_bfd_no_cleanup): Define. * format.c (bfd_reinit): Add cleanup parameter, call it. (bfd_check_format_matches): Set cleanup from _bfd_check_format call and pass to bfd_reinit. Delete temp, use abfd->xvec instead. * aout-target.h (callback, object_p): Return bfd_cleanup. * aout-tic30.c (tic30_aout_callback, tic30_aout_object_p): Likewise. * archive.c (bfd_generic_archive_p): Likewise. * binary.c (binary_object_p): Likewise. * coff-alpha.c (alpha_ecoff_object_p): Likewise. * coff-ia64.c (ia64coff_object_p): Likewise. * coff-rs6000.c (_bfd_xcoff_archive_p, rs6000coff_core_p): Likewise. * coff-sh.c (coff_small_object_p): Likewise. * coff-stgo32.c (go32_check_format): Likewise. * coff64-rs6000.c (xcoff64_archive_p, rs6000coff_core_p), (xcoff64_core_p): Likewise. * coffgen.c (coff_real_object_p, coff_object_p): Likewise. * elf-bfd.h (bfd_elf32_object_p, bfd_elf32_core_file_p), (bfd_elf64_object_p, bfd_elf64_core_file_p): Likewise. * elfcode.h (elf_object_p): Likewise. * elfcore.h (elf_core_file_p): Likewise. * i386msdos.c (msdos_object_p): Likewise. * ihex.c (ihex_object_p): Likewise. * libaout.h (some_aout_object_p): Likewise. * libbfd-in.h (bfd_generic_archive_p, _bfd_dummy_target), (_bfd_vms_lib_alpha_archive_p, _bfd_vms_lib_ia64_archive_p): Likewise. * libbfd.c (_bfd_dummy_target): Likewise. * libcoff-in.h (coff_object_p): Likewise. * mach-o-aarch64.c (bfd_mach_o_arm64_object_p), (bfd_mach_o_arm64_core_p): Likewise. * mach-o-arm.c (bfd_mach_o_arm_object_p), (bfd_mach_o_arm_core_p): Likewise. * mach-o-i386.c (bfd_mach_o_i386_object_p), (bfd_mach_o_i386_core_p): Likewise. * mach-o-x86-64.c (bfd_mach_o_x86_64_object_p), (bfd_mach_o_x86_64_core_p): Likewise. * mach-o.c (bfd_mach_o_header_p, bfd_mach_o_gen_object_p), (bfd_mach_o_gen_core_p, bfd_mach_o_fat_archive_p): Likewise. * mach-o.h (bfd_mach_o_object_p, bfd_mach_o_core_p), (bfd_mach_o_fat_archive_p, bfd_mach_o_header_p): Likewise. * mmo.c (mmo_object_p): Likewise. * pef.c (bfd_pef_object_p, bfd_pef_xlib_object_p): Likewise. * peicode.h (coff_real_object_p, pe_ILF_object_p), (pe_bfd_object_p): Likewise. * plugin.c (ld_plugin_object_p, bfd_plugin_object_p): Likewise. * ppcboot.c (ppcboot_object_p): Likewise. * rs6000-core.c (rs6000coff_core_p): Likewise. * som.c (som_object_setup, som_object_p): Likewise. * srec.c (srec_object_p, symbolsrec_object_p): Likewise. * tekhex.c (tekhex_object_p): Likewise. * vms-alpha.c (alpha_vms_object_p): Likewise. * vms-lib.c (_bfd_vms_lib_archive_p, _bfd_vms_lib_alpha_archive_p), (_bfd_vms_lib_ia64_archive_p, _bfd_vms_lib_txt_archive_p): Likewise. * wasm-module.c (wasm_object_p): Likewise. * xsym.c (bfd_sym_object_p): Likewise. * xsym.h (bfd_sym_object_p): Likewise. * aoutx.h (some_aout_object_p): Likewise, and callback parameter return type. * pdp11.c (some_aout_object_p): Likewise. * plugin.c (register_ld_plugin_object_p): Update object_p parameter type. * plugin.h (register_ld_plugin_object_p): Likewise. * bfd-in2.h: Regenerate. * libbfd.h: Regenerate. * libcoff.h: Regenerate. ld/ * plugin.c (plugin_object_p): Return a bfd_cleanup. (plugin_cleanup): New function.
390 lines
11 KiB
C
390 lines
11 KiB
C
/* Intel x86-64 Mach-O support for BFD.
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Copyright (C) 2010-2020 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/x86-64.h"
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#define bfd_mach_o_object_p bfd_mach_o_x86_64_object_p
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#define bfd_mach_o_core_p bfd_mach_o_x86_64_core_p
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#define bfd_mach_o_mkobject bfd_mach_o_x86_64_mkobject
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static bfd_cleanup
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bfd_mach_o_x86_64_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_X86_64);
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}
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static bfd_cleanup
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bfd_mach_o_x86_64_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_X86_64);
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}
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static bfd_boolean
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bfd_mach_o_x86_64_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_64;
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mdata->header.cputype = BFD_MACH_O_CPU_TYPE_X86_64;
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mdata->header.cpusubtype =
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BFD_MACH_O_CPU_SUBTYPE_X86_ALL | BFD_MACH_O_CPU_SUBTYPE_LIB64;
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mdata->header.byteorder = BFD_ENDIAN_LITTLE;
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mdata->header.version = 2;
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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 x86_64_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_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_MACH_O_X86_64_PCREL32_1, 0, 2, 32, TRUE, 0,
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complain_overflow_bitfield,
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NULL, "DISP32_1",
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FALSE, 0xffffffff, 0xffffffff, TRUE),
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/* 4 */
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HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_2, 0, 2, 32, TRUE, 0,
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complain_overflow_bitfield,
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NULL, "DISP32_2",
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FALSE, 0xffffffff, 0xffffffff, TRUE),
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HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_4, 0, 2, 32, TRUE, 0,
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complain_overflow_bitfield,
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NULL, "DISP32_4",
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FALSE, 0xffffffff, 0xffffffff, TRUE),
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HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH32, 0, 2, 32, TRUE, 0,
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complain_overflow_bitfield,
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NULL, "BRANCH32",
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FALSE, 0xffffffff, 0xffffffff, TRUE),
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HOWTO(BFD_RELOC_MACH_O_X86_64_GOT_LOAD, 0, 2, 32, TRUE, 0,
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complain_overflow_bitfield,
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NULL, "GOT_LOAD",
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FALSE, 0xffffffff, 0xffffffff, TRUE),
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/* 8 */
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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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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_X86_64_GOT, 0, 2, 32, TRUE, 0,
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complain_overflow_bitfield,
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NULL, "GOT",
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FALSE, 0xffffffff, 0xffffffff, TRUE),
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HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH8, 0, 0, 8, TRUE, 0,
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complain_overflow_bitfield,
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NULL, "BRANCH8",
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FALSE, 0xff, 0xff, TRUE),
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/* 12 */
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HOWTO(BFD_RELOC_MACH_O_X86_64_TLV, 0, 2, 32, TRUE, 0,
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complain_overflow_bitfield,
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NULL, "TLV",
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FALSE, 0xffffffff, 0xffffffff, TRUE),
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};
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static bfd_boolean
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bfd_mach_o_x86_64_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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if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms))
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return FALSE;
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/* On x86-64, scattered relocs are not used. */
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if (reloc.r_scattered)
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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_X86_64_RELOC_UNSIGNED:
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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 = &x86_64_howto_table[1];
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return TRUE;
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case 3:
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res->howto = &x86_64_howto_table[0];
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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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case BFD_MACH_O_X86_64_RELOC_SIGNED:
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if (reloc.r_length == 2 && reloc.r_pcrel)
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{
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res->howto = &x86_64_howto_table[2];
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return TRUE;
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}
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break;
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case BFD_MACH_O_X86_64_RELOC_BRANCH:
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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 = &x86_64_howto_table[6];
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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_X86_64_RELOC_GOT_LOAD:
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if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern)
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{
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res->howto = &x86_64_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_X86_64_RELOC_GOT:
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if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern)
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{
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res->howto = &x86_64_howto_table[10];
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return TRUE;
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}
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break;
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case BFD_MACH_O_X86_64_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 = &x86_64_howto_table[8];
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return TRUE;
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case 3:
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res->howto = &x86_64_howto_table[9];
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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_X86_64_RELOC_SIGNED_1:
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if (reloc.r_length == 2 && reloc.r_pcrel)
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{
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res->howto = &x86_64_howto_table[3];
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return TRUE;
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}
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break;
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case BFD_MACH_O_X86_64_RELOC_SIGNED_2:
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if (reloc.r_length == 2 && reloc.r_pcrel)
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{
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res->howto = &x86_64_howto_table[4];
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return TRUE;
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}
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break;
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case BFD_MACH_O_X86_64_RELOC_SIGNED_4:
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if (reloc.r_length == 2 && reloc.r_pcrel)
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{
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res->howto = &x86_64_howto_table[5];
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return TRUE;
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}
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break;
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case BFD_MACH_O_X86_64_RELOC_TLV:
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if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern)
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{
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res->howto = &x86_64_howto_table[12];
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return TRUE;
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}
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break;
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default:
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return FALSE;
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}
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return FALSE;
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}
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static bfd_boolean
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bfd_mach_o_x86_64_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo)
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{
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rinfo->r_address = rel->address;
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rinfo->r_scattered = 0;
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switch (rel->howto->type)
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{
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case BFD_RELOC_32:
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rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED;
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rinfo->r_pcrel = 0;
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rinfo->r_length = 2;
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break;
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case BFD_RELOC_64:
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rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED;
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rinfo->r_pcrel = 0;
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rinfo->r_length = 3;
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break;
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case BFD_RELOC_32_PCREL:
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rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED;
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rinfo->r_pcrel = 1;
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rinfo->r_length = 2;
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break;
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case BFD_RELOC_MACH_O_X86_64_PCREL32_1:
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rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_1;
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rinfo->r_pcrel = 1;
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rinfo->r_length = 2;
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break;
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case BFD_RELOC_MACH_O_X86_64_PCREL32_2:
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rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_2;
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rinfo->r_pcrel = 1;
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rinfo->r_length = 2;
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break;
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case BFD_RELOC_MACH_O_X86_64_PCREL32_4:
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rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_4;
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rinfo->r_pcrel = 1;
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rinfo->r_length = 2;
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break;
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case BFD_RELOC_MACH_O_X86_64_BRANCH32:
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rinfo->r_type = BFD_MACH_O_X86_64_RELOC_BRANCH;
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rinfo->r_pcrel = 1;
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rinfo->r_length = 2;
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break;
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case BFD_RELOC_MACH_O_SUBTRACTOR32:
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rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SUBTRACTOR;
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rinfo->r_pcrel = 0;
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rinfo->r_length = 2;
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break;
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case BFD_RELOC_MACH_O_SUBTRACTOR64:
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rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SUBTRACTOR;
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rinfo->r_pcrel = 0;
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rinfo->r_length = 3;
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break;
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case BFD_RELOC_MACH_O_X86_64_GOT:
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rinfo->r_type = BFD_MACH_O_X86_64_RELOC_GOT;
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rinfo->r_pcrel = 1;
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rinfo->r_length = 2;
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break;
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case BFD_RELOC_MACH_O_X86_64_GOT_LOAD:
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rinfo->r_type = BFD_MACH_O_X86_64_RELOC_GOT_LOAD;
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rinfo->r_pcrel = 1;
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rinfo->r_length = 2;
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break;
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case BFD_RELOC_MACH_O_X86_64_TLV:
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rinfo->r_type = BFD_MACH_O_X86_64_RELOC_TLV;
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rinfo->r_pcrel = 1;
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rinfo->r_length = 2;
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break;
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default:
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return FALSE;
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}
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if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM)
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{
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rinfo->r_extern = 0;
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rinfo->r_value =
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(*rel->sym_ptr_ptr)->section->output_section->target_index;
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}
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else
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{
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rinfo->r_extern = 1;
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rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i;
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}
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return TRUE;
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}
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static reloc_howto_type *
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bfd_mach_o_x86_64_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 (x86_64_howto_table) / sizeof (*x86_64_howto_table);
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i++)
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if (code == x86_64_howto_table[i].type)
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return &x86_64_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_x86_64_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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static bfd_boolean
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bfd_mach_o_section_type_valid_for_x86_64 (unsigned long val)
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{
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if (val == BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS
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|| val == BFD_MACH_O_S_LAZY_SYMBOL_POINTERS
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|| val == BFD_MACH_O_S_SYMBOL_STUBS)
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return FALSE;
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return TRUE;
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}
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/* We want to bump the alignment of some sections. */
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static const mach_o_section_name_xlat text_section_names_xlat[] =
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{
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{ ".eh_frame", "__eh_frame",
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SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
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|
BFD_MACH_O_S_ATTR_LIVE_SUPPORT
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|
| BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
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|
| BFD_MACH_O_S_ATTR_NO_TOC, 3},
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|
{ NULL, NULL, 0, 0, 0, 0}
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|
};
|
|
|
|
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
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|
#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"
|