2000-11-30 20:16:54 +01:00
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/* X86-64 specific support for 64-bit ELF
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2002-02-21 16:31:53 +01:00
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Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
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2000-11-30 20:16:54 +01:00
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Contributed by Jan Hubicka <jh@suse.cz>.
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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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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2002-02-21 16:31:53 +01:00
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#include "bfdlink.h"
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2000-11-30 20:16:54 +01:00
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/x86-64.h"
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/* We use only the RELA entries. */
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2002-02-21 16:31:53 +01:00
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#define USE_RELA 1
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2000-11-30 20:16:54 +01:00
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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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/* The relocation "howto" table. Order of fields:
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2001-02-14 11:57:47 +01:00
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type, size, bitsize, pc_relative, complain_on_overflow,
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special_function, name, partial_inplace, src_mask, dst_pack, pcrel_offset. */
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2001-01-23 11:49:50 +01:00
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static reloc_howto_type x86_64_elf_howto_table[] =
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{
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2001-02-14 11:57:47 +01:00
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HOWTO(R_X86_64_NONE, 0, 0, 0, false, 0, complain_overflow_dont,
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2001-04-23 10:00:14 +02:00
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bfd_elf_generic_reloc, "R_X86_64_NONE", false, 0x00000000, 0x00000000,
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false),
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2001-02-14 11:57:47 +01:00
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HOWTO(R_X86_64_64, 0, 4, 64, false, 0, complain_overflow_bitfield,
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2001-04-23 10:00:14 +02:00
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bfd_elf_generic_reloc, "R_X86_64_64", false, MINUS_ONE, MINUS_ONE,
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false),
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2001-02-14 11:57:47 +01:00
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HOWTO(R_X86_64_PC32, 0, 4, 32, true, 0, complain_overflow_signed,
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2001-04-23 10:00:14 +02:00
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bfd_elf_generic_reloc, "R_X86_64_PC32", false, 0xffffffff, 0xffffffff,
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true),
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2001-02-14 11:57:47 +01:00
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HOWTO(R_X86_64_GOT32, 0, 4, 32, false, 0, complain_overflow_signed,
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2001-04-23 10:00:14 +02:00
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bfd_elf_generic_reloc, "R_X86_64_GOT32", false, 0xffffffff, 0xffffffff,
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false),
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2001-02-14 11:57:47 +01:00
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HOWTO(R_X86_64_PLT32, 0, 4, 32, true, 0, complain_overflow_signed,
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2001-04-23 10:00:14 +02:00
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bfd_elf_generic_reloc, "R_X86_64_PLT32", false, 0xffffffff, 0xffffffff,
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true),
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2001-02-14 11:57:47 +01:00
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HOWTO(R_X86_64_COPY, 0, 4, 32, false, 0, complain_overflow_bitfield,
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2001-04-23 10:00:14 +02:00
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bfd_elf_generic_reloc, "R_X86_64_COPY", false, 0xffffffff, 0xffffffff,
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false),
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2001-02-14 11:57:47 +01:00
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HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, false, 0, complain_overflow_bitfield,
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2001-04-23 10:00:14 +02:00
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bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", false, MINUS_ONE,
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MINUS_ONE, false),
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2001-02-14 11:57:47 +01:00
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HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, false, 0, complain_overflow_bitfield,
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2001-04-23 10:00:14 +02:00
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bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", false, MINUS_ONE,
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MINUS_ONE, false),
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2001-02-26 08:50:22 +01:00
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HOWTO(R_X86_64_RELATIVE, 0, 4, 64, false, 0, complain_overflow_bitfield,
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2001-04-23 10:00:14 +02:00
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bfd_elf_generic_reloc, "R_X86_64_RELATIVE", false, MINUS_ONE,
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MINUS_ONE, false),
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2001-02-14 11:57:47 +01:00
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HOWTO(R_X86_64_GOTPCREL, 0, 4, 32, true,0 , complain_overflow_signed,
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2001-04-23 10:00:14 +02:00
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bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", false, 0xffffffff,
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0xffffffff, true),
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2001-02-14 11:57:47 +01:00
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HOWTO(R_X86_64_32, 0, 4, 32, false, 0, complain_overflow_unsigned,
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2001-04-23 10:00:14 +02:00
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bfd_elf_generic_reloc, "R_X86_64_32", false, 0xffffffff, 0xffffffff,
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false),
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2001-02-14 11:57:47 +01:00
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HOWTO(R_X86_64_32S, 0, 4, 32, false, 0, complain_overflow_signed,
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2001-04-23 10:00:14 +02:00
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bfd_elf_generic_reloc, "R_X86_64_32S", false, 0xffffffff, 0xffffffff,
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false),
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2001-02-14 11:57:47 +01:00
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HOWTO(R_X86_64_16, 0, 1, 16, false, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_X86_64_16", false, 0xffff, 0xffff, false),
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HOWTO(R_X86_64_PC16,0, 1, 16, true, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_X86_64_PC16", false, 0xffff, 0xffff, true),
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HOWTO(R_X86_64_8, 0, 0, 8, false, 0, complain_overflow_signed,
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bfd_elf_generic_reloc, "R_X86_64_8", false, 0xff, 0xff, false),
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HOWTO(R_X86_64_PC8, 0, 0, 8, true, 0, complain_overflow_signed,
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2001-04-23 10:00:14 +02:00
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bfd_elf_generic_reloc, "R_X86_64_PC8", false, 0xff, 0xff, true),
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/* GNU extension to record C++ vtable hierarchy. */
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HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, false, 0, complain_overflow_dont,
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NULL, "R_X86_64_GNU_VTINHERIT", false, 0, 0, false),
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/* GNU extension to record C++ vtable member usage. */
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HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, false, 0, complain_overflow_dont,
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_bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", false, 0, 0,
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false)
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2000-11-30 20:16:54 +01:00
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};
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/* Map BFD relocs to the x86_64 elf relocs. */
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2001-01-23 11:49:50 +01:00
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struct elf_reloc_map
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{
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2000-11-30 20:16:54 +01:00
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bfd_reloc_code_real_type bfd_reloc_val;
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unsigned char elf_reloc_val;
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};
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Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 11:57:26 +02:00
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static const struct elf_reloc_map x86_64_reloc_map[] =
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2000-11-30 20:16:54 +01:00
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{
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2001-01-23 11:49:50 +01:00
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{ BFD_RELOC_NONE, R_X86_64_NONE, },
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{ BFD_RELOC_64, R_X86_64_64, },
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{ BFD_RELOC_32_PCREL, R_X86_64_PC32, },
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{ BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
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{ BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
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{ BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
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{ BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
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{ BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
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{ BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
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{ BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
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{ BFD_RELOC_32, R_X86_64_32, },
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{ BFD_RELOC_X86_64_32S, R_X86_64_32S, },
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{ BFD_RELOC_16, R_X86_64_16, },
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{ BFD_RELOC_16_PCREL, R_X86_64_PC16, },
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{ BFD_RELOC_8, R_X86_64_8, },
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{ BFD_RELOC_8_PCREL, R_X86_64_PC8, },
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2001-04-23 10:00:14 +02:00
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{ BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
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{ BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
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2000-11-30 20:16:54 +01:00
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};
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static reloc_howto_type *elf64_x86_64_reloc_type_lookup
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PARAMS ((bfd *, bfd_reloc_code_real_type));
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static void elf64_x86_64_info_to_howto
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PARAMS ((bfd *, arelent *, Elf64_Internal_Rela *));
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static struct bfd_link_hash_table *elf64_x86_64_link_hash_table_create
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PARAMS ((bfd *));
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2001-08-10 21:29:59 +02:00
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static boolean elf64_x86_64_elf_object_p PARAMS ((bfd *abfd));
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2002-02-21 16:31:53 +01:00
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static boolean create_got_section
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PARAMS((bfd *, struct bfd_link_info *));
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static boolean elf64_x86_64_create_dynamic_sections
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PARAMS((bfd *, struct bfd_link_info *));
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static void elf64_x86_64_copy_indirect_symbol
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PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
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2001-08-10 21:29:59 +02:00
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static boolean elf64_x86_64_check_relocs
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PARAMS ((bfd *, struct bfd_link_info *, asection *sec,
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const Elf_Internal_Rela *));
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static asection *elf64_x86_64_gc_mark_hook
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PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
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struct elf_link_hash_entry *, Elf_Internal_Sym *));
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static boolean elf64_x86_64_gc_sweep_hook
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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2001-01-23 11:49:50 +01:00
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2002-02-21 16:31:53 +01:00
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static struct bfd_hash_entry *link_hash_newfunc
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2001-01-23 11:49:50 +01:00
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PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
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static boolean elf64_x86_64_adjust_dynamic_symbol
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PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
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2002-02-21 16:31:53 +01:00
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static boolean allocate_dynrelocs
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PARAMS ((struct elf_link_hash_entry *, PTR));
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static boolean readonly_dynrelocs
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PARAMS ((struct elf_link_hash_entry *, PTR));
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2001-01-23 11:49:50 +01:00
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static boolean elf64_x86_64_size_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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2000-11-30 20:16:54 +01:00
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static boolean elf64_x86_64_relocate_section
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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2001-02-14 11:57:47 +01:00
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
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2001-01-23 11:49:50 +01:00
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static boolean elf64_x86_64_finish_dynamic_symbol
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PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
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Elf_Internal_Sym *sym));
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static boolean elf64_x86_64_finish_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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2001-09-24 03:38:31 +02:00
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static enum elf_reloc_type_class elf64_x86_64_reloc_type_class
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PARAMS ((const Elf_Internal_Rela *));
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2000-11-30 20:16:54 +01:00
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/* Given a BFD reloc type, return a HOWTO structure. */
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static reloc_howto_type *
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elf64_x86_64_reloc_type_lookup (abfd, code)
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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; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
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i++)
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{
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if (x86_64_reloc_map[i].bfd_reloc_val == code)
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2001-09-28 14:54:53 +02:00
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return &x86_64_elf_howto_table[i];
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2000-11-30 20:16:54 +01:00
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}
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return 0;
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}
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/* Given an x86_64 ELF reloc type, fill in an arelent structure. */
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2000-12-07 20:31:48 +01:00
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2000-11-30 20:16:54 +01:00
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static void
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elf64_x86_64_info_to_howto (abfd, cache_ptr, dst)
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bfd *abfd ATTRIBUTE_UNUSED;
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arelent *cache_ptr;
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Elf64_Internal_Rela *dst;
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{
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2001-04-23 10:00:14 +02:00
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unsigned r_type, i;
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2000-11-30 20:16:54 +01:00
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r_type = ELF64_R_TYPE (dst->r_info);
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2001-04-23 10:00:14 +02:00
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if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT)
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{
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BFD_ASSERT (r_type <= (unsigned int) R_X86_64_PC8);
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i = r_type;
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}
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else
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{
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BFD_ASSERT (r_type < (unsigned int) R_X86_64_max);
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i = r_type - ((unsigned int) R_X86_64_GNU_VTINHERIT - R_X86_64_PC8 - 1);
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}
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cache_ptr->howto = &x86_64_elf_howto_table[i];
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2000-11-30 20:16:54 +01:00
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BFD_ASSERT (r_type == cache_ptr->howto->type);
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}
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2001-01-23 11:49:50 +01:00
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2001-02-14 11:57:47 +01:00
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/* Functions for the x86-64 ELF linker. */
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2001-01-23 11:49:50 +01:00
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2001-02-14 11:57:47 +01:00
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/* The name of the dynamic interpreter. This is put in the .interp
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2001-01-23 11:49:50 +01:00
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section. */
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2001-02-14 11:57:47 +01:00
|
|
|
|
#define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* The size in bytes of an entry in the global offset table. */
|
|
|
|
|
|
|
|
|
|
#define GOT_ENTRY_SIZE 8
|
2000-11-30 20:16:54 +01:00
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
/* The size in bytes of an entry in the procedure linkage table. */
|
2000-11-30 20:16:54 +01:00
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
#define PLT_ENTRY_SIZE 16
|
|
|
|
|
|
|
|
|
|
/* The first entry in a procedure linkage table looks like this. See the
|
|
|
|
|
SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
|
|
|
|
|
|
|
|
|
|
static const bfd_byte elf64_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
|
|
|
|
|
{
|
2001-04-19 11:39:28 +02:00
|
|
|
|
0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
|
|
|
|
|
0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
|
|
|
|
|
0x90, 0x90, 0x90, 0x90 /* pad out to 16 bytes with nops. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Subsequent entries in a procedure linkage table look like this. */
|
|
|
|
|
|
|
|
|
|
static const bfd_byte elf64_x86_64_plt_entry[PLT_ENTRY_SIZE] =
|
|
|
|
|
{
|
2001-04-19 11:39:28 +02:00
|
|
|
|
0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
|
2001-02-14 11:57:47 +01:00
|
|
|
|
0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
|
2001-04-19 11:39:28 +02:00
|
|
|
|
0x68, /* pushq immediate */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
0, 0, 0, 0, /* replaced with index into relocation table. */
|
|
|
|
|
0xe9, /* jmp relative */
|
|
|
|
|
0, 0, 0, 0 /* replaced with offset to start of .plt0. */
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* The x86-64 linker needs to keep track of the number of relocs that
|
2002-04-28 14:29:46 +02:00
|
|
|
|
it decides to copy as dynamic relocs in check_relocs for each symbol.
|
2002-02-21 16:31:53 +01:00
|
|
|
|
This is so that it can later discard them if they are found to be
|
|
|
|
|
unnecessary. We store the information in a field extending the
|
|
|
|
|
regular ELF linker hash table. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct elf64_x86_64_dyn_relocs
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
|
|
|
|
/* Next section. */
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct elf64_x86_64_dyn_relocs *next;
|
|
|
|
|
|
|
|
|
|
/* The input section of the reloc. */
|
|
|
|
|
asection *sec;
|
|
|
|
|
|
|
|
|
|
/* Total number of relocs copied for the input section. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
bfd_size_type count;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
|
|
|
|
|
/* Number of pc-relative relocs copied for the input section. */
|
|
|
|
|
bfd_size_type pc_count;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* x86-64 ELF linker hash entry. */
|
|
|
|
|
|
|
|
|
|
struct elf64_x86_64_link_hash_entry
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct elf_link_hash_entry elf;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* Track dynamic relocs copied for this symbol. */
|
|
|
|
|
struct elf64_x86_64_dyn_relocs *dyn_relocs;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
};
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* x86-64 ELF linker hash table. */
|
2000-11-30 20:16:54 +01:00
|
|
|
|
|
2001-02-14 11:57:47 +01:00
|
|
|
|
struct elf64_x86_64_link_hash_table
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct elf_link_hash_table elf;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* Short-cuts to get to dynamic linker sections. */
|
|
|
|
|
asection *sgot;
|
|
|
|
|
asection *sgotplt;
|
|
|
|
|
asection *srelgot;
|
|
|
|
|
asection *splt;
|
|
|
|
|
asection *srelplt;
|
|
|
|
|
asection *sdynbss;
|
|
|
|
|
asection *srelbss;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* Small local sym to section mapping cache. */
|
|
|
|
|
struct sym_sec_cache sym_sec;
|
|
|
|
|
};
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* Get the x86-64 ELF linker hash table from a link_info structure. */
|
2000-11-30 20:16:54 +01:00
|
|
|
|
|
|
|
|
|
#define elf64_x86_64_hash_table(p) \
|
|
|
|
|
((struct elf64_x86_64_link_hash_table *) ((p)->hash))
|
|
|
|
|
|
2001-02-14 11:57:47 +01:00
|
|
|
|
/* Create an entry in an x86-64 ELF linker hash table. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
static struct bfd_hash_entry *
|
2002-02-21 16:31:53 +01:00
|
|
|
|
link_hash_newfunc (entry, table, string)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
struct bfd_hash_entry *entry;
|
|
|
|
|
struct bfd_hash_table *table;
|
|
|
|
|
const char *string;
|
|
|
|
|
{
|
|
|
|
|
/* Allocate the structure if it has not already been allocated by a
|
2002-02-21 16:31:53 +01:00
|
|
|
|
subclass. */
|
|
|
|
|
if (entry == NULL)
|
|
|
|
|
{
|
|
|
|
|
entry = bfd_hash_allocate (table,
|
|
|
|
|
sizeof (struct elf64_x86_64_link_hash_entry));
|
|
|
|
|
if (entry == NULL)
|
|
|
|
|
return entry;
|
|
|
|
|
}
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* Call the allocation method of the superclass. */
|
2002-02-21 16:31:53 +01:00
|
|
|
|
entry = _bfd_elf_link_hash_newfunc (entry, table, string);
|
|
|
|
|
if (entry != NULL)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct elf64_x86_64_link_hash_entry *eh;
|
|
|
|
|
|
|
|
|
|
eh = (struct elf64_x86_64_link_hash_entry *) entry;
|
|
|
|
|
eh->dyn_relocs = NULL;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
return entry;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
|
2000-11-30 20:16:54 +01:00
|
|
|
|
/* Create an X86-64 ELF linker hash table. */
|
|
|
|
|
|
|
|
|
|
static struct bfd_link_hash_table *
|
|
|
|
|
elf64_x86_64_link_hash_table_create (abfd)
|
|
|
|
|
bfd *abfd;
|
|
|
|
|
{
|
|
|
|
|
struct elf64_x86_64_link_hash_table *ret;
|
Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 11:57:26 +02:00
|
|
|
|
bfd_size_type amt = sizeof (struct elf64_x86_64_link_hash_table);
|
2000-11-30 20:16:54 +01:00
|
|
|
|
|
2002-04-04 21:53:38 +02:00
|
|
|
|
ret = (struct elf64_x86_64_link_hash_table *) bfd_malloc (amt);
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (ret == NULL)
|
2000-11-30 20:16:54 +01:00
|
|
|
|
return NULL;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
|
2000-11-30 20:16:54 +01:00
|
|
|
|
{
|
2002-04-04 21:53:38 +02:00
|
|
|
|
free (ret);
|
2000-11-30 20:16:54 +01:00
|
|
|
|
return NULL;
|
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
ret->sgot = NULL;
|
|
|
|
|
ret->sgotplt = NULL;
|
|
|
|
|
ret->srelgot = NULL;
|
|
|
|
|
ret->splt = NULL;
|
|
|
|
|
ret->srelplt = NULL;
|
|
|
|
|
ret->sdynbss = NULL;
|
|
|
|
|
ret->srelbss = NULL;
|
|
|
|
|
ret->sym_sec.abfd = NULL;
|
|
|
|
|
|
|
|
|
|
return &ret->elf.root;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
|
|
|
|
|
shortcuts to them in our hash table. */
|
|
|
|
|
|
|
|
|
|
static boolean
|
|
|
|
|
create_got_section (dynobj, info)
|
|
|
|
|
bfd *dynobj;
|
|
|
|
|
struct bfd_link_info *info;
|
|
|
|
|
{
|
|
|
|
|
struct elf64_x86_64_link_hash_table *htab;
|
|
|
|
|
|
|
|
|
|
if (! _bfd_elf_create_got_section (dynobj, info))
|
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
htab = elf64_x86_64_hash_table (info);
|
|
|
|
|
htab->sgot = bfd_get_section_by_name (dynobj, ".got");
|
|
|
|
|
htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
|
|
|
|
|
if (!htab->sgot || !htab->sgotplt)
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
htab->srelgot = bfd_make_section (dynobj, ".rela.got");
|
|
|
|
|
if (htab->srelgot == NULL
|
|
|
|
|
|| ! bfd_set_section_flags (dynobj, htab->srelgot,
|
|
|
|
|
(SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
|
|
|
|
|
| SEC_IN_MEMORY | SEC_LINKER_CREATED
|
|
|
|
|
| SEC_READONLY))
|
|
|
|
|
|| ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
|
|
|
|
|
return false;
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
|
|
|
|
|
.rela.bss sections in DYNOBJ, and set up shortcuts to them in our
|
|
|
|
|
hash table. */
|
|
|
|
|
|
|
|
|
|
static boolean
|
|
|
|
|
elf64_x86_64_create_dynamic_sections (dynobj, info)
|
|
|
|
|
bfd *dynobj;
|
|
|
|
|
struct bfd_link_info *info;
|
|
|
|
|
{
|
|
|
|
|
struct elf64_x86_64_link_hash_table *htab;
|
|
|
|
|
|
|
|
|
|
htab = elf64_x86_64_hash_table (info);
|
|
|
|
|
if (!htab->sgot && !create_got_section (dynobj, info))
|
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
if (!_bfd_elf_create_dynamic_sections (dynobj, info))
|
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
htab->splt = bfd_get_section_by_name (dynobj, ".plt");
|
|
|
|
|
htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
|
|
|
|
|
htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
|
|
|
|
|
if (!info->shared)
|
|
|
|
|
htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
|
|
|
|
|
|
|
|
|
|
if (!htab->splt || !htab->srelplt || !htab->sdynbss
|
|
|
|
|
|| (!info->shared && !htab->srelbss))
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Copy the extra info we tack onto an elf_link_hash_entry. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
elf64_x86_64_copy_indirect_symbol (dir, ind)
|
|
|
|
|
struct elf_link_hash_entry *dir, *ind;
|
|
|
|
|
{
|
|
|
|
|
struct elf64_x86_64_link_hash_entry *edir, *eind;
|
|
|
|
|
|
|
|
|
|
edir = (struct elf64_x86_64_link_hash_entry *) dir;
|
|
|
|
|
eind = (struct elf64_x86_64_link_hash_entry *) ind;
|
|
|
|
|
|
|
|
|
|
if (eind->dyn_relocs != NULL)
|
|
|
|
|
{
|
|
|
|
|
if (edir->dyn_relocs != NULL)
|
|
|
|
|
{
|
|
|
|
|
struct elf64_x86_64_dyn_relocs **pp;
|
|
|
|
|
struct elf64_x86_64_dyn_relocs *p;
|
|
|
|
|
|
|
|
|
|
if (ind->root.type == bfd_link_hash_indirect)
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
/* Add reloc counts against the weak sym to the strong sym
|
|
|
|
|
list. Merge any entries against the same section. */
|
|
|
|
|
for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
|
|
|
|
|
{
|
|
|
|
|
struct elf64_x86_64_dyn_relocs *q;
|
|
|
|
|
|
|
|
|
|
for (q = edir->dyn_relocs; q != NULL; q = q->next)
|
|
|
|
|
if (q->sec == p->sec)
|
|
|
|
|
{
|
|
|
|
|
q->pc_count += p->pc_count;
|
|
|
|
|
q->count += p->count;
|
|
|
|
|
*pp = p->next;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (q == NULL)
|
|
|
|
|
pp = &p->next;
|
|
|
|
|
}
|
|
|
|
|
*pp = edir->dyn_relocs;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
edir->dyn_relocs = eind->dyn_relocs;
|
|
|
|
|
eind->dyn_relocs = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
_bfd_elf_link_hash_copy_indirect (dir, ind);
|
2000-11-30 20:16:54 +01:00
|
|
|
|
}
|
|
|
|
|
|
2001-08-10 21:29:59 +02:00
|
|
|
|
static boolean
|
2000-11-30 20:16:54 +01:00
|
|
|
|
elf64_x86_64_elf_object_p (abfd)
|
|
|
|
|
bfd *abfd;
|
|
|
|
|
{
|
|
|
|
|
/* Set the right machine number for an x86-64 elf64 file. */
|
|
|
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
/* Look through the relocs for a section during the first phase, and
|
2002-02-21 16:31:53 +01:00
|
|
|
|
calculate needed space in the global offset table, procedure
|
|
|
|
|
linkage table, and dynamic reloc sections. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
static boolean
|
|
|
|
|
elf64_x86_64_check_relocs (abfd, info, sec, relocs)
|
|
|
|
|
bfd *abfd;
|
|
|
|
|
struct bfd_link_info *info;
|
|
|
|
|
asection *sec;
|
|
|
|
|
const Elf_Internal_Rela *relocs;
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct elf64_x86_64_link_hash_table *htab;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
|
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
|
|
|
const Elf_Internal_Rela *rel;
|
|
|
|
|
const Elf_Internal_Rela *rel_end;
|
|
|
|
|
asection *sreloc;
|
|
|
|
|
|
|
|
|
|
if (info->relocateable)
|
|
|
|
|
return true;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab = elf64_x86_64_hash_table (info);
|
2001-01-23 11:49:50 +01:00
|
|
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
|
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
sreloc = NULL;
|
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
rel_end = relocs + sec->reloc_count;
|
|
|
|
|
for (rel = relocs; rel < rel_end; rel++)
|
|
|
|
|
{
|
|
|
|
|
unsigned long r_symndx;
|
|
|
|
|
struct elf_link_hash_entry *h;
|
|
|
|
|
|
|
|
|
|
r_symndx = ELF64_R_SYM (rel->r_info);
|
2002-02-21 16:31:53 +01:00
|
|
|
|
|
|
|
|
|
if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
|
|
|
|
|
{
|
|
|
|
|
(*_bfd_error_handler) (_("%s: bad symbol index: %d"),
|
|
|
|
|
bfd_archive_filename (abfd),
|
|
|
|
|
r_symndx);
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
|
|
|
h = NULL;
|
|
|
|
|
else
|
|
|
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
|
|
|
|
|
|
|
|
switch (ELF64_R_TYPE (rel->r_info))
|
|
|
|
|
{
|
|
|
|
|
case R_X86_64_GOT32:
|
2002-02-21 16:31:53 +01:00
|
|
|
|
case R_X86_64_GOTPCREL:
|
2001-02-14 11:57:47 +01:00
|
|
|
|
/* This symbol requires a global offset table entry. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
if (h != NULL)
|
|
|
|
|
{
|
2001-09-29 08:21:59 +02:00
|
|
|
|
h->got.refcount += 1;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
bfd_signed_vma *local_got_refcounts;
|
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
/* This is a global offset table entry for a local symbol. */
|
2002-02-21 16:31:53 +01:00
|
|
|
|
local_got_refcounts = elf_local_got_refcounts (abfd);
|
2001-01-23 11:49:50 +01:00
|
|
|
|
if (local_got_refcounts == NULL)
|
|
|
|
|
{
|
Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 11:57:26 +02:00
|
|
|
|
bfd_size_type size;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 11:57:26 +02:00
|
|
|
|
size = symtab_hdr->sh_info;
|
|
|
|
|
size *= sizeof (bfd_signed_vma);
|
2001-01-23 11:49:50 +01:00
|
|
|
|
local_got_refcounts = ((bfd_signed_vma *)
|
2001-09-29 08:21:59 +02:00
|
|
|
|
bfd_zalloc (abfd, size));
|
2001-01-23 11:49:50 +01:00
|
|
|
|
if (local_got_refcounts == NULL)
|
|
|
|
|
return false;
|
|
|
|
|
elf_local_got_refcounts (abfd) = local_got_refcounts;
|
|
|
|
|
}
|
2001-09-29 08:21:59 +02:00
|
|
|
|
local_got_refcounts[r_symndx] += 1;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* Fall through */
|
|
|
|
|
|
|
|
|
|
//case R_X86_64_GOTPCREL:
|
|
|
|
|
if (htab->sgot == NULL)
|
|
|
|
|
{
|
|
|
|
|
if (htab->elf.dynobj == NULL)
|
|
|
|
|
htab->elf.dynobj = abfd;
|
|
|
|
|
if (!create_got_section (htab->elf.dynobj, info))
|
|
|
|
|
return false;
|
|
|
|
|
}
|
2001-01-23 11:49:50 +01:00
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case R_X86_64_PLT32:
|
|
|
|
|
/* This symbol requires a procedure linkage table entry. We
|
2001-02-14 11:57:47 +01:00
|
|
|
|
actually build the entry in adjust_dynamic_symbol,
|
|
|
|
|
because this might be a case of linking PIC code which is
|
|
|
|
|
never referenced by a dynamic object, in which case we
|
|
|
|
|
don't need to generate a procedure linkage table entry
|
|
|
|
|
after all. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* If this is a local symbol, we resolve it directly without
|
2001-02-14 11:57:47 +01:00
|
|
|
|
creating a procedure linkage table entry. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
if (h == NULL)
|
|
|
|
|
continue;
|
|
|
|
|
|
2001-06-07 16:45:36 +02:00
|
|
|
|
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
2001-09-29 08:21:59 +02:00
|
|
|
|
h->plt.refcount += 1;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
break;
|
|
|
|
|
|
2001-06-07 16:45:36 +02:00
|
|
|
|
case R_X86_64_8:
|
|
|
|
|
case R_X86_64_16:
|
2001-01-23 11:49:50 +01:00
|
|
|
|
case R_X86_64_32:
|
2001-06-07 16:45:36 +02:00
|
|
|
|
case R_X86_64_64:
|
2001-01-23 11:49:50 +01:00
|
|
|
|
case R_X86_64_32S:
|
2002-02-21 16:31:53 +01:00
|
|
|
|
case R_X86_64_PC8:
|
|
|
|
|
case R_X86_64_PC16:
|
2001-01-23 11:49:50 +01:00
|
|
|
|
case R_X86_64_PC32:
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (h != NULL && !info->shared)
|
|
|
|
|
{
|
|
|
|
|
/* If this reloc is in a read-only section, we might
|
|
|
|
|
need a copy reloc. We can't check reliably at this
|
|
|
|
|
stage whether the section is read-only, as input
|
|
|
|
|
sections have not yet been mapped to output sections.
|
|
|
|
|
Tentatively set the flag for now, and correct in
|
|
|
|
|
adjust_dynamic_symbol. */
|
|
|
|
|
h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
|
|
|
|
|
|
|
|
|
|
/* We may need a .plt entry if the function this reloc
|
|
|
|
|
refers to is in a shared lib. */
|
|
|
|
|
h->plt.refcount += 1;
|
|
|
|
|
}
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* If we are creating a shared library, and this is a reloc
|
|
|
|
|
against a global symbol, or a non PC relative reloc
|
|
|
|
|
against a local symbol, then we need to copy the reloc
|
|
|
|
|
into the shared library. However, if we are linking with
|
|
|
|
|
-Bsymbolic, we do not need to copy a reloc against a
|
|
|
|
|
global symbol which is defined in an object we are
|
2001-02-14 11:57:47 +01:00
|
|
|
|
including in the link (i.e., DEF_REGULAR is set). At
|
2001-01-23 11:49:50 +01:00
|
|
|
|
this point we have not seen all the input files, so it is
|
|
|
|
|
possible that DEF_REGULAR is not set now but will be set
|
2002-02-21 16:31:53 +01:00
|
|
|
|
later (it is never cleared). In case of a weak definition,
|
|
|
|
|
DEF_REGULAR may be cleared later by a strong definition in
|
|
|
|
|
a shared library. We account for that possibility below by
|
|
|
|
|
storing information in the relocs_copied field of the hash
|
|
|
|
|
table entry. A similar situation occurs when creating
|
|
|
|
|
shared libraries and symbol visibility changes render the
|
|
|
|
|
symbol local.
|
|
|
|
|
|
|
|
|
|
If on the other hand, we are creating an executable, we
|
|
|
|
|
may need to keep relocations for symbols satisfied by a
|
|
|
|
|
dynamic library if we manage to avoid copy relocs for the
|
|
|
|
|
symbol. */
|
|
|
|
|
if ((info->shared
|
|
|
|
|
&& (sec->flags & SEC_ALLOC) != 0
|
|
|
|
|
&& (((ELF64_R_TYPE (rel->r_info) != R_X86_64_PC8)
|
|
|
|
|
&& (ELF64_R_TYPE (rel->r_info) != R_X86_64_PC16)
|
|
|
|
|
&& (ELF64_R_TYPE (rel->r_info) != R_X86_64_PC32))
|
|
|
|
|
|| (h != NULL
|
|
|
|
|
&& (! info->symbolic
|
|
|
|
|
|| h->root.type == bfd_link_hash_defweak
|
|
|
|
|
|| (h->elf_link_hash_flags
|
|
|
|
|
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|
|
|
|
|
|| (!info->shared
|
|
|
|
|
&& (sec->flags & SEC_ALLOC) != 0
|
|
|
|
|
&& h != NULL
|
|
|
|
|
&& (h->root.type == bfd_link_hash_defweak
|
|
|
|
|
|| (h->elf_link_hash_flags
|
|
|
|
|
& ELF_LINK_HASH_DEF_REGULAR) == 0)))
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct elf64_x86_64_dyn_relocs *p;
|
|
|
|
|
struct elf64_x86_64_dyn_relocs **head;
|
|
|
|
|
|
|
|
|
|
/* We must copy these reloc types into the output file.
|
|
|
|
|
Create a reloc section in dynobj and make room for
|
|
|
|
|
this reloc. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
if (sreloc == NULL)
|
|
|
|
|
{
|
|
|
|
|
const char *name;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
bfd *dynobj;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
name = (bfd_elf_string_from_elf_section
|
|
|
|
|
(abfd,
|
|
|
|
|
elf_elfheader (abfd)->e_shstrndx,
|
|
|
|
|
elf_section_data (sec)->rel_hdr.sh_name));
|
|
|
|
|
if (name == NULL)
|
|
|
|
|
return false;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (strncmp (name, ".rela", 5) != 0
|
|
|
|
|
|| strcmp (bfd_get_section_name (abfd, sec),
|
|
|
|
|
name + 5) != 0)
|
|
|
|
|
{
|
|
|
|
|
(*_bfd_error_handler)
|
|
|
|
|
(_("%s: bad relocation section name `%s\'"),
|
|
|
|
|
bfd_archive_filename (abfd), name);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (htab->elf.dynobj == NULL)
|
|
|
|
|
htab->elf.dynobj = abfd;
|
|
|
|
|
|
|
|
|
|
dynobj = htab->elf.dynobj;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
sreloc = bfd_get_section_by_name (dynobj, name);
|
|
|
|
|
if (sreloc == NULL)
|
|
|
|
|
{
|
|
|
|
|
flagword flags;
|
|
|
|
|
|
|
|
|
|
sreloc = bfd_make_section (dynobj, name);
|
|
|
|
|
flags = (SEC_HAS_CONTENTS | SEC_READONLY
|
|
|
|
|
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
|
|
|
|
if ((sec->flags & SEC_ALLOC) != 0)
|
|
|
|
|
flags |= SEC_ALLOC | SEC_LOAD;
|
|
|
|
|
if (sreloc == NULL
|
|
|
|
|
|| ! bfd_set_section_flags (dynobj, sreloc, flags)
|
2001-06-07 16:45:36 +02:00
|
|
|
|
|| ! bfd_set_section_alignment (dynobj, sreloc, 3))
|
2001-01-23 11:49:50 +01:00
|
|
|
|
return false;
|
|
|
|
|
}
|
2002-02-21 16:31:53 +01:00
|
|
|
|
elf_section_data (sec)->sreloc = sreloc;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* If this is a global symbol, we count the number of
|
|
|
|
|
relocations we need for this symbol. */
|
|
|
|
|
if (h != NULL)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
head = &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* Track dynamic relocs needed for local syms too.
|
|
|
|
|
We really need local syms available to do this
|
|
|
|
|
easily. Oh well. */
|
|
|
|
|
|
|
|
|
|
asection *s;
|
|
|
|
|
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
|
|
|
|
|
sec, r_symndx);
|
|
|
|
|
if (s == NULL)
|
|
|
|
|
return false;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
head = ((struct elf64_x86_64_dyn_relocs **)
|
|
|
|
|
&elf_section_data (s)->local_dynrel);
|
|
|
|
|
}
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
p = *head;
|
|
|
|
|
if (p == NULL || p->sec != sec)
|
|
|
|
|
{
|
|
|
|
|
bfd_size_type amt = sizeof *p;
|
|
|
|
|
p = ((struct elf64_x86_64_dyn_relocs *)
|
|
|
|
|
bfd_alloc (htab->elf.dynobj, amt));
|
2001-01-23 11:49:50 +01:00
|
|
|
|
if (p == NULL)
|
2002-02-21 16:31:53 +01:00
|
|
|
|
return false;
|
|
|
|
|
p->next = *head;
|
|
|
|
|
*head = p;
|
|
|
|
|
p->sec = sec;
|
|
|
|
|
p->count = 0;
|
|
|
|
|
p->pc_count = 0;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
2002-02-21 16:31:53 +01:00
|
|
|
|
|
|
|
|
|
p->count += 1;
|
|
|
|
|
if (ELF64_R_TYPE (rel->r_info) == R_X86_64_PC8
|
|
|
|
|
|| ELF64_R_TYPE (rel->r_info) == R_X86_64_PC16
|
|
|
|
|
|| ELF64_R_TYPE (rel->r_info) == R_X86_64_PC32)
|
|
|
|
|
p->pc_count += 1;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
break;
|
2001-04-23 10:00:14 +02:00
|
|
|
|
|
|
|
|
|
/* This relocation describes the C++ object vtable hierarchy.
|
|
|
|
|
Reconstruct it for later use during GC. */
|
|
|
|
|
case R_X86_64_GNU_VTINHERIT:
|
|
|
|
|
if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
|
|
|
|
return false;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* This relocation describes which C++ vtable entries are actually
|
|
|
|
|
used. Record for later use during GC. */
|
|
|
|
|
case R_X86_64_GNU_VTENTRY:
|
2001-06-07 16:45:36 +02:00
|
|
|
|
if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
2001-04-23 10:00:14 +02:00
|
|
|
|
return false;
|
|
|
|
|
break;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
break;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Return the section that should be marked against GC for a given
|
2001-02-14 11:57:47 +01:00
|
|
|
|
relocation. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
static asection *
|
|
|
|
|
elf64_x86_64_gc_mark_hook (abfd, info, rel, h, sym)
|
|
|
|
|
bfd *abfd;
|
|
|
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
Elf_Internal_Rela *rel;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
struct elf_link_hash_entry *h;
|
|
|
|
|
Elf_Internal_Sym *sym;
|
|
|
|
|
{
|
|
|
|
|
if (h != NULL)
|
|
|
|
|
{
|
2001-04-23 10:00:14 +02:00
|
|
|
|
switch (ELF64_R_TYPE (rel->r_info))
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2001-04-23 10:00:14 +02:00
|
|
|
|
case R_X86_64_GNU_VTINHERIT:
|
|
|
|
|
case R_X86_64_GNU_VTENTRY:
|
|
|
|
|
break;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
default:
|
2001-04-23 10:00:14 +02:00
|
|
|
|
switch (h->root.type)
|
|
|
|
|
{
|
|
|
|
|
case bfd_link_hash_defined:
|
|
|
|
|
case bfd_link_hash_defweak:
|
|
|
|
|
return h->root.u.def.section;
|
|
|
|
|
|
|
|
|
|
case bfd_link_hash_common:
|
|
|
|
|
return h->root.u.c.p->section;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
Support for more than 64k ELF sections.
include/elf/ChangeLog
* external.h (Elf_External_Sym_Shndx): Declare.
* internal.h (struct elf_internal_sym <st_shndx>): Make it an
unsigned int.
* common.h (SHN_BAD): Define.
bfd/ChangeLog
* configure.in: Bump bfd version.
* configure: Regenerate.
* elf-bfd.h (elf_size_info <swap_symbol_out>): Add shndx param.
(bfd_elf32_swap_symbol_in): Likewise.
(bfd_elf32_swap_symbol_out): Likewise.
(bfd_elf64_swap_symbol_in): Likewise.
(bfd_elf64_swap_symbol_out): Likewise.
(elf_reloc_cookie): Add locsym_shndx field. Make locsyms a PTR.
(elf_obj_tdata): Add num_elf_sections, symtab_shndx_hdr and
symtab_shndx_section.
(elf_numsections): Define.
(elf_symtab_shndx): Define.
* elf.c (setup_group): Use elf_numsections rather than header e_shnum.
(bfd_elf_find_section): Likewise.
(bfd_section_from_elf_index): Likewise.
(bfd_section_from_shdr): Likewise. Handle SHT_SYMTAB_SHNDX.
(bfd_section_from_r_symndx): Read symbol shndx extension, and
translate st_shndx for > SHN_HIRESERVE.
(assign_section_numbers): Skip reserved sections. Assign
symtab_shndx_section and elf_numsections. Exclude reserved
sections from e_shnum. Set up symtab_shndx_hdr.
(_bfd_elf_compute_section_file_positions): Handle symtab_shndx_hdr.
(map_sections_to_segments): Don't map eh_frame_hdr unless required.
(assign_file_positions_except_relocs): Use elf_numsections rather
than header e_shnum. Skip reserved sections and symtab_shndx_section.
(prep_headers): Set name for symtab_shndx_hdr.
(_bfd_elf_assign_file_positions_for_relocs): Use elf_numsections.
(_bfd_elf_write_object_contents): Likewise. Skip reserved sections.
(_bfd_elf_section_from_bfd_section): Check bfd_{abs,com,und}_section
first. Use elf_section_data if available. Use elf_numsections.
Start scan at index 1.
(copy_private_bfd_data ): Comment fixes.
(MAP_ONESYMTAB): Define above SHN_HIOS.
(MAP_DYNSYMTAB): Likewise.
(MAP_STRTAB): Likewise.
(MAP_SHSTRTAB): Likewise.
(MAP_SYM_SHNDX): New define.
(_bfd_elf_copy_private_symbol_data): Handle symtab_shndx_section.
(swap_out_syms): Swap out SHT_SYMTAB_SHNDX section too.
* elfcode.h (elf_swap_symbol_in): Add shndx param, and handle shndx
extension.
(elf_swap_symbol_out): Likewise.
(elf_object_p): Set elf_numsections, and use instead of e_shnum.
Initialialise reserved elf_elfsections to point at shdr[0]. Remove
redundant bfd_release calls.
(elf_slurp_symbol_table): Read symbol shndx extension, and use with
elf_swap_symbol_in. Translate st_shndx for > SHN_HIRESERVE too.
* elflink.h (elf_link_is_defined_archive_symbol): Read symbol shndx
extension, and use with elf_swap_symbol_in.
(elf_link_record_local_dynamic_symbol): Likewise.
(elf_link_add_object_symbols): Likewise. Also translate st_shndx
for elf sections > SHN_HIRESERVE.
(NAME(bfd_elf,size_dynamic_sections)): Adjust elf_swap_symbol_out
call.
(struct elf_final_link_info): Add locsym_shndx and symshndxbuf.
(elf_bfd_final_link): Allocate the above, and tidy code allocating
other buffers. Use elf_numsections instead of e_shnum. Adjust
elf_swap_symbol_out calls.
(elf_link_output_sym): Swap out symbol shndx extension too.
(elf_link_flush_output_syms): And flush them to disk.
(elf_link_output_extsym): Use SHN_BAD. Adjust elf_swap_symbol_out
calls.
(elf_gc_mark): Read symbol shndx extension, and use with
elf_swap_symbol_in.
(elf_link_input_bfd): Likewise, Translate st_shndx for elf sections
> SHN_HIRESERVE too. Use SHN_BAD.
(elf_reloc_symbol_deleted_p): Use symbol shndx extensions with
elf_swap_symbol_in. Translate st_shndx > SHN_HIRESERVE too.
(elf_bfd_discard_info): Read symbol shndx extension. Don't attempt
to continue after a bfd error.
* elf-m10200.c (mn10200_elf_relax_section): Only read local syms.
Stash them immediately to symtab_hdr->contents rather than later
in multiple places. Clean up afterwards. Read symbol shndx
extension, and use with swap_symbol_in. Translate SHN_UNDEF,
SHN_ABS, SHN_COMMON and elf sections > SHN_HIRESERVE to bfd
sections too. Remove dead code.
(mn10200_elf_relax_delete_bytes): Use symbol shndx extension
when swapping in symbols. Tidy code adjusting global syms.
Don't swap in global syms.
(mn10200_elf_symbol_address_p): Likewise. Remove extsyms param.
(mn10200_elf_get_relocated_section_contents): Read symbol shndx
extension, and use with swap_symbol_in. Rename "size" -> "amt"
to maximize code in common with other files. Translate st_shndx
for > SHN_HIRESERVE too. Remove dead code.
* elf-m10300.c (mn10300_elf_relax_section): Only read local syms.
Stash them immediately to symtab_hdr->contents rather than later
in multiple places. Clean up afterwards. Read symbol shndx
extension, and use with swap_symbol_in. Remove dead code.
(mn10300_elf_relax_delete_bytes): As for elf-m10200.c.
(mn10300_elf_symbol_address_p): Likewise.
(mn10300_elf_get_relocated_section_contents): Likewise.
* elf32-h8300.c (elf32_h8_relax_section): As for elf-m10300.c.
(elf32_h8_relax_delete_bytes): Likewise.
(elf32_h8_symbol_address_p): Likewise.
(elf32_h8_get_relocated_section_contents): Likewise.
* elf32-hppa.c (elf32_hppa_size_stubs): Read symbol shndx
extension, and use with swap_symbol_in.
* elf64-hppa.c (elf64_hppa_check_relocs): Likewise.
* elf32-i370.c (i370_elf_finish_dynamic_sections): Adjust call to
bfd_elf32_swap_symbol_out.
* elf32-m32r.c (m32r_elf_get_relocated_section_contents): Translate
elf sections > SHN_HIRESERVE too.
* elf32-m68k.c (bfd_m68k_elf32_create_embedded_relocs): Only read
local syms. Read symbol shndx extension, and use with swap_symbol_in.
* elf32-mips.c (_bfd_mips_elf_final_write_processing): Use
elf_numsections rather than header e_shnum.
* elf32-sh.c (sh_elf_relax_section): As for elf-m10300.c.
(sh_elf_relax_delete_bytes): Likewise.
(sh_elf_get_relocated_section_contents): Likewise. Only read local
symbols.
* elf32-v850.c (v850_elf_symbol_processing): Use an unsigned int to
hold section index. Use elf_numsections rather than e_shnum.
Rename "index" -> "indx" to avoid shadowing warning.
(v850_elf_add_symbol_hook): Likewise.
* elf64-alpha.c (elf64_alpha_relax_section): Only read local syms.
Read symbol shndx extension, and use with swap_symbol_in.
* elf32-xstormy16.c (xstormy16_elf_relax_section): Likewise.
Translate SHN_COMMON and elf sections > SHN_HIRESERVE too.
* elfxx-ia64.c (elfNN_ia64_relax_section): Likewise.
(elfNN_ia64_aix_add_symbol_hook): Use elf_numsections.
* elf-m10300.c (mn10300_elf_gc_mark_hook): Remove unnecessary checks
before calling bfd_section_from_elf_index on local syms.
* elf32-arm.h (elf32_arm_gc_mark_hook): Likewise.
* elf32-avr.c (elf32_avr_gc_mark_hook): Likewise.
* elf32-cris.c (cris_elf_gc_mark_hook): Likewise.
* elf32-d10v.c (elf32_d10v_gc_mark_hook): Likewise.
* elf32-fr30.c (fr30_elf_gc_mark_hook): Likewise.
* elf32-hppa.c (elf32_hppa_gc_mark_hook): Likewise.
* elf32-i386.c (elf_i386_gc_mark_hook): Likewise.
* elf32-m32r.c (m32r_elf_gc_mark_hook): Likewise.
* elf32-m68k.c (elf_m68k_gc_mark_hook): Likewise.
* elf32-mcore.c (mcore_elf_gc_mark_hook): Likewise.
* elf32-mips.c (_bfd_mips_elf_gc_mark_hook): Likewise.
* elf32-openrisc.c (openrisc_elf_gc_mark_hook): Likewise.
* elf32-ppc.c (ppc_elf_gc_mark_hook): Likewise.
* elf32-s390.c (elf_s390_gc_mark_hook): Likewise.
* elf32-sh.c (sh_elf_gc_mark_hook): Likewise.
* elf32-sparc.c (elf32_sparc_gc_mark_hook): Likewise.
* elf32-v850.c (v850_elf_gc_mark_hook): Likewise.
* elf32-xstormy16.c (xstormy16_elf_gc_mark_hook): Likewise.
* elf64-mips.c (mips_elf64_gc_mark_hook): Likewise.
* elf64-mmix.c (mmix_elf_gc_mark_hook): Likewise.
* elf64-ppc.c (ppc64_elf_gc_mark_hook): Likewise.
* elf64-s390.c (elf_s390_gc_mark_hook): Likewise.
* elf64-x86-64.c (elf64_x86_64_gc_mark_hook): Likewise.
binutils/ChangeLog
* readelf.c (symtab_shndx_hdr): New global.
(SECTION_HEADER_INDEX): Define.
(SECTION_HEADER_NUM): Define.
(SECTION_HEADER): Define.
(GET_ELF_SYMBOLS): Pass two params rather than three.
(get_32bit_elf_symbols): Take file and section args. Read and
use SHT_SYMTAB_SHNDX.
(get_64bit_elf_symbols): Likewise.
(dump_relocations): Use SECTION_HEADER to index "section_headers".
(process_section_headers): Likewise. Use SECTION_HEADER_NUM too.
Remember symtab_shdx_hdr.
(process_program_headers): Scan from index 1 for segment map.
(slurp_ia64_unwind_table): Use SECTION_HEADER to index
"section_headers".
(process_relocs): Likewise. Also adjust call to GET_ELF_SYMBOLS.
(process_unwind): Likewise.
(process_version_sections): Likewise.
(process_symbol_table): Likewise.
(display_debug_info): Likewise.
(process_dynamic_segment): Fake up a symtab section for changed
GET_ELF_SYMBOLS.
(get_symbol_index_type): Check SHN_LOOS before SHN_LORESERVE.
(process_program_headers): Kill signed/unsigned warning.
(load_debug_str): Likewise.
(display_debug_info): Likewise.
2001-12-17 01:52:35 +01:00
|
|
|
|
return bfd_section_from_elf_index (abfd, sym->st_shndx);
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
|
}
|
|
|
|
|
|
2001-02-14 11:57:47 +01:00
|
|
|
|
/* Update the got entry reference counts for the section being removed. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
static boolean
|
|
|
|
|
elf64_x86_64_gc_sweep_hook (abfd, info, sec, relocs)
|
|
|
|
|
bfd *abfd;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct bfd_link_info *info;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
asection *sec;
|
|
|
|
|
const Elf_Internal_Rela *relocs;
|
|
|
|
|
{
|
|
|
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
|
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
|
|
|
bfd_signed_vma *local_got_refcounts;
|
|
|
|
|
const Elf_Internal_Rela *rel, *relend;
|
|
|
|
|
unsigned long r_symndx;
|
|
|
|
|
struct elf_link_hash_entry *h;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
|
|
|
|
|
elf_section_data (sec)->local_dynrel = NULL;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
|
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
|
|
|
local_got_refcounts = elf_local_got_refcounts (abfd);
|
|
|
|
|
|
|
|
|
|
relend = relocs + sec->reloc_count;
|
|
|
|
|
for (rel = relocs; rel < relend; rel++)
|
|
|
|
|
switch (ELF64_R_TYPE (rel->r_info))
|
|
|
|
|
{
|
|
|
|
|
case R_X86_64_GOT32:
|
|
|
|
|
case R_X86_64_GOTPCREL:
|
|
|
|
|
r_symndx = ELF64_R_SYM (rel->r_info);
|
|
|
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
|
|
|
|
{
|
|
|
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
|
|
|
if (h->got.refcount > 0)
|
2002-02-21 16:31:53 +01:00
|
|
|
|
h->got.refcount -= 1;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
else if (local_got_refcounts != NULL)
|
|
|
|
|
{
|
|
|
|
|
if (local_got_refcounts[r_symndx] > 0)
|
2002-02-21 16:31:53 +01:00
|
|
|
|
local_got_refcounts[r_symndx] -= 1;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
case R_X86_64_8:
|
|
|
|
|
case R_X86_64_16:
|
|
|
|
|
case R_X86_64_32:
|
|
|
|
|
case R_X86_64_64:
|
|
|
|
|
case R_X86_64_32S:
|
|
|
|
|
case R_X86_64_PC8:
|
|
|
|
|
case R_X86_64_PC16:
|
|
|
|
|
case R_X86_64_PC32:
|
|
|
|
|
r_symndx = ELF64_R_SYM (rel->r_info);
|
|
|
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
|
|
|
|
{
|
|
|
|
|
struct elf64_x86_64_link_hash_entry *eh;
|
|
|
|
|
struct elf64_x86_64_dyn_relocs **pp;
|
|
|
|
|
struct elf64_x86_64_dyn_relocs *p;
|
|
|
|
|
|
|
|
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
|
|
|
|
|
|
|
|
if (!info->shared && h->plt.refcount > 0)
|
|
|
|
|
h->plt.refcount -= 1;
|
|
|
|
|
|
|
|
|
|
eh = (struct elf64_x86_64_link_hash_entry *) h;
|
|
|
|
|
|
|
|
|
|
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
|
|
|
|
|
if (p->sec == sec)
|
|
|
|
|
{
|
|
|
|
|
if (ELF64_R_TYPE (rel->r_info) == R_X86_64_PC8
|
|
|
|
|
|| ELF64_R_TYPE (rel->r_info) == R_X86_64_PC16
|
|
|
|
|
|| ELF64_R_TYPE (rel->r_info) == R_X86_64_PC32)
|
|
|
|
|
p->pc_count -= 1;
|
|
|
|
|
p->count -= 1;
|
|
|
|
|
if (p->count == 0)
|
|
|
|
|
*pp = p->next;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
case R_X86_64_PLT32:
|
|
|
|
|
r_symndx = ELF64_R_SYM (rel->r_info);
|
|
|
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
|
|
|
|
{
|
|
|
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
|
|
|
if (h->plt.refcount > 0)
|
|
|
|
|
h->plt.refcount -= 1;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Adjust a symbol defined by a dynamic object and referenced by a
|
|
|
|
|
regular object. The current definition is in some section of the
|
|
|
|
|
dynamic object, but we're not including those sections. We have to
|
|
|
|
|
change the definition to something the rest of the link can
|
2001-02-14 11:57:47 +01:00
|
|
|
|
understand. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
static boolean
|
|
|
|
|
elf64_x86_64_adjust_dynamic_symbol (info, h)
|
|
|
|
|
struct bfd_link_info *info;
|
|
|
|
|
struct elf_link_hash_entry *h;
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct elf64_x86_64_link_hash_table *htab;
|
|
|
|
|
struct elf64_x86_64_link_hash_entry * eh;
|
|
|
|
|
struct elf64_x86_64_dyn_relocs *p;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
asection *s;
|
|
|
|
|
unsigned int power_of_two;
|
|
|
|
|
|
|
|
|
|
/* If this is a function, put it in the procedure linkage table. We
|
|
|
|
|
will fill in the contents of the procedure linkage table later,
|
|
|
|
|
when we know the address of the .got section. */
|
|
|
|
|
if (h->type == STT_FUNC
|
|
|
|
|
|| (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (h->plt.refcount <= 0
|
|
|
|
|
|| (! info->shared
|
|
|
|
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
|
|
|
|
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
|
|
|
|
|
&& h->root.type != bfd_link_hash_undefweak
|
|
|
|
|
&& h->root.type != bfd_link_hash_undefined))
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
|
|
|
|
/* This case can occur if we saw a PLT32 reloc in an input
|
|
|
|
|
file, but the symbol was never referred to by a dynamic
|
|
|
|
|
object, or if all references were garbage collected. In
|
|
|
|
|
such a case, we don't actually need to build a procedure
|
|
|
|
|
linkage table, and we can just do a PC32 reloc instead. */
|
|
|
|
|
h->plt.offset = (bfd_vma) -1;
|
|
|
|
|
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
2001-10-15 09:28:45 +02:00
|
|
|
|
else
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* It's possible that we incorrectly decided a .plt reloc was
|
|
|
|
|
needed for an R_X86_64_PC32 reloc to a non-function sym in
|
|
|
|
|
check_relocs. We can't decide accurately between function and
|
|
|
|
|
non-function syms in check-relocs; Objects loaded later in
|
|
|
|
|
the link may change h->type. So fix it now. */
|
2001-10-15 09:28:45 +02:00
|
|
|
|
h->plt.offset = (bfd_vma) -1;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* If this is a weak symbol, and there is a real definition, the
|
|
|
|
|
processor independent code will have arranged for us to see the
|
2001-02-14 11:57:47 +01:00
|
|
|
|
real definition first, and we can just use the same value. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
if (h->weakdef != NULL)
|
|
|
|
|
{
|
|
|
|
|
BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
|
|
|
|
|
|| h->weakdef->root.type == bfd_link_hash_defweak);
|
|
|
|
|
h->root.u.def.section = h->weakdef->root.u.def.section;
|
|
|
|
|
h->root.u.def.value = h->weakdef->root.u.def.value;
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* This is a reference to a symbol defined by a dynamic object which
|
2001-02-14 11:57:47 +01:00
|
|
|
|
is not a function. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* If we are creating a shared library, we must presume that the
|
|
|
|
|
only references to the symbol are via the global offset table.
|
|
|
|
|
For such cases we need not do anything here; the relocations will
|
2001-02-14 11:57:47 +01:00
|
|
|
|
be handled correctly by relocate_section. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
if (info->shared)
|
|
|
|
|
return true;
|
|
|
|
|
|
|
|
|
|
/* If there are no references to this symbol that do not use the
|
|
|
|
|
GOT, we don't need to generate a copy reloc. */
|
|
|
|
|
if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
|
|
|
|
|
return true;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* If -z nocopyreloc was given, we won't generate them either. */
|
|
|
|
|
if (info->nocopyreloc)
|
|
|
|
|
{
|
|
|
|
|
h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
eh = (struct elf64_x86_64_link_hash_entry *) h;
|
|
|
|
|
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
|
|
|
|
{
|
|
|
|
|
s = p->sec->output_section;
|
|
|
|
|
if (s != NULL && (s->flags & SEC_READONLY) != 0)
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* If we didn't find any dynamic relocs in read-only sections, then
|
|
|
|
|
we'll be keeping the dynamic relocs and avoiding the copy reloc. */
|
|
|
|
|
if (p == NULL)
|
|
|
|
|
{
|
|
|
|
|
h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
/* We must allocate the symbol in our .dynbss section, which will
|
2001-02-14 11:57:47 +01:00
|
|
|
|
become part of the .bss section of the executable. There will be
|
2001-01-23 11:49:50 +01:00
|
|
|
|
an entry for this symbol in the .dynsym section. The dynamic
|
|
|
|
|
object will contain position independent code, so all references
|
|
|
|
|
from the dynamic object to this symbol will go through the global
|
|
|
|
|
offset table. The dynamic linker will use the .dynsym entry to
|
|
|
|
|
determine the address it must put in the global offset table, so
|
|
|
|
|
both the dynamic object and the regular object will refer to the
|
|
|
|
|
same memory location for the variable. */
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab = elf64_x86_64_hash_table (info);
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
|
|
|
|
|
to copy the initial value out of the dynamic object and into the
|
2002-02-21 16:31:53 +01:00
|
|
|
|
runtime process image. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
|
2001-01-23 11:49:50 +01:00
|
|
|
|
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* We need to figure out the alignment required for this symbol. I
|
2001-02-14 11:57:47 +01:00
|
|
|
|
have no idea how ELF linkers handle this. 16-bytes is the size
|
2001-01-23 11:49:50 +01:00
|
|
|
|
of the largest type that requires hard alignment -- long double. */
|
|
|
|
|
/* FIXME: This is VERY ugly. Should be fixed for all architectures using
|
|
|
|
|
this construct. */
|
|
|
|
|
power_of_two = bfd_log2 (h->size);
|
|
|
|
|
if (power_of_two > 4)
|
|
|
|
|
power_of_two = 4;
|
|
|
|
|
|
|
|
|
|
/* Apply the required alignment. */
|
2002-02-21 16:31:53 +01:00
|
|
|
|
s = htab->sdynbss;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
|
2001-01-23 11:49:50 +01:00
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Define the symbol as being at this point in the section. */
|
|
|
|
|
h->root.u.def.section = s;
|
|
|
|
|
h->root.u.def.value = s->_raw_size;
|
|
|
|
|
|
|
|
|
|
/* Increment the section size to make room for the symbol. */
|
|
|
|
|
s->_raw_size += h->size;
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* This is the condition under which elf64_x86_64_finish_dynamic_symbol
|
|
|
|
|
will be called from elflink.h. If elflink.h doesn't call our
|
|
|
|
|
finish_dynamic_symbol routine, we'll need to do something about
|
|
|
|
|
initializing any .plt and .got entries in elf64_x86_64_relocate_section. */
|
|
|
|
|
#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
|
|
|
|
|
((DYN) \
|
|
|
|
|
&& ((INFO)->shared \
|
|
|
|
|
|| ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
|
|
|
|
|
&& ((H)->dynindx != -1 \
|
|
|
|
|
|| ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
|
|
|
|
|
|
|
|
|
|
/* Allocate space in .plt, .got and associated reloc sections for
|
|
|
|
|
dynamic relocs. */
|
|
|
|
|
|
|
|
|
|
static boolean
|
|
|
|
|
allocate_dynrelocs (h, inf)
|
|
|
|
|
struct elf_link_hash_entry *h;
|
|
|
|
|
PTR inf;
|
|
|
|
|
{
|
|
|
|
|
struct bfd_link_info *info;
|
|
|
|
|
struct elf64_x86_64_link_hash_table *htab;
|
|
|
|
|
struct elf64_x86_64_link_hash_entry *eh;
|
|
|
|
|
struct elf64_x86_64_dyn_relocs *p;
|
|
|
|
|
|
2002-03-28 04:27:46 +01:00
|
|
|
|
if (h->root.type == bfd_link_hash_indirect)
|
2002-02-21 16:31:53 +01:00
|
|
|
|
return true;
|
|
|
|
|
|
2002-03-28 04:27:46 +01:00
|
|
|
|
if (h->root.type == bfd_link_hash_warning)
|
|
|
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
info = (struct bfd_link_info *) inf;
|
|
|
|
|
htab = elf64_x86_64_hash_table (info);
|
|
|
|
|
|
|
|
|
|
if (htab->elf.dynamic_sections_created
|
|
|
|
|
&& h->plt.refcount > 0)
|
|
|
|
|
{
|
|
|
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
|
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
|
|
|
if (h->dynindx == -1
|
|
|
|
|
&& (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
|
|
|
|
|
{
|
|
|
|
|
if (! bfd_elf64_link_record_dynamic_symbol (info, h))
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
|
|
|
|
|
{
|
|
|
|
|
asection *s = htab->splt;
|
|
|
|
|
|
|
|
|
|
/* If this is the first .plt entry, make room for the special
|
|
|
|
|
first entry. */
|
|
|
|
|
if (s->_raw_size == 0)
|
|
|
|
|
s->_raw_size += PLT_ENTRY_SIZE;
|
|
|
|
|
|
|
|
|
|
h->plt.offset = s->_raw_size;
|
|
|
|
|
|
|
|
|
|
/* If this symbol is not defined in a regular file, and we are
|
|
|
|
|
not generating a shared library, then set the symbol to this
|
|
|
|
|
location in the .plt. This is required to make function
|
|
|
|
|
pointers compare as equal between the normal executable and
|
|
|
|
|
the shared library. */
|
|
|
|
|
if (! info->shared
|
|
|
|
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
|
|
|
|
{
|
|
|
|
|
h->root.u.def.section = s;
|
|
|
|
|
h->root.u.def.value = h->plt.offset;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Make room for this entry. */
|
|
|
|
|
s->_raw_size += PLT_ENTRY_SIZE;
|
|
|
|
|
|
|
|
|
|
/* We also need to make an entry in the .got.plt section, which
|
|
|
|
|
will be placed in the .got section by the linker script. */
|
|
|
|
|
htab->sgotplt->_raw_size += GOT_ENTRY_SIZE;
|
|
|
|
|
|
|
|
|
|
/* We also need to make an entry in the .rela.plt section. */
|
|
|
|
|
htab->srelplt->_raw_size += sizeof (Elf64_External_Rela);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
h->plt.offset = (bfd_vma) -1;
|
|
|
|
|
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
h->plt.offset = (bfd_vma) -1;
|
|
|
|
|
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (h->got.refcount > 0)
|
|
|
|
|
{
|
|
|
|
|
asection *s;
|
|
|
|
|
boolean dyn;
|
|
|
|
|
|
|
|
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
|
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
|
|
|
if (h->dynindx == -1
|
|
|
|
|
&& (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
|
|
|
|
|
{
|
|
|
|
|
if (! bfd_elf64_link_record_dynamic_symbol (info, h))
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
s = htab->sgot;
|
|
|
|
|
h->got.offset = s->_raw_size;
|
|
|
|
|
s->_raw_size += GOT_ENTRY_SIZE;
|
|
|
|
|
dyn = htab->elf.dynamic_sections_created;
|
|
|
|
|
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
|
|
|
|
|
htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
h->got.offset = (bfd_vma) -1;
|
|
|
|
|
|
|
|
|
|
eh = (struct elf64_x86_64_link_hash_entry *) h;
|
|
|
|
|
if (eh->dyn_relocs == NULL)
|
|
|
|
|
return true;
|
|
|
|
|
|
|
|
|
|
/* In the shared -Bsymbolic case, discard space allocated for
|
|
|
|
|
dynamic pc-relative relocs against symbols which turn out to be
|
|
|
|
|
defined in regular objects. For the normal shared case, discard
|
|
|
|
|
space for pc-relative relocs that have become local due to symbol
|
|
|
|
|
visibility changes. */
|
|
|
|
|
|
|
|
|
|
if (info->shared)
|
|
|
|
|
{
|
|
|
|
|
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
|
|
|
|
|
&& ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
|
|
|
|
|
|| info->symbolic))
|
|
|
|
|
{
|
|
|
|
|
struct elf64_x86_64_dyn_relocs **pp;
|
|
|
|
|
|
|
|
|
|
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
|
|
|
|
|
{
|
|
|
|
|
p->count -= p->pc_count;
|
|
|
|
|
p->pc_count = 0;
|
|
|
|
|
if (p->count == 0)
|
|
|
|
|
*pp = p->next;
|
|
|
|
|
else
|
|
|
|
|
pp = &p->next;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* For the non-shared case, discard space for relocs against
|
|
|
|
|
symbols which turn out to need copy relocs or are not
|
|
|
|
|
dynamic. */
|
|
|
|
|
|
|
|
|
|
if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
|
|
|
|
|
&& (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
|
|
|
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
|
|
|
|
|| (htab->elf.dynamic_sections_created
|
|
|
|
|
&& (h->root.type == bfd_link_hash_undefweak
|
|
|
|
|
|| h->root.type == bfd_link_hash_undefined))))
|
|
|
|
|
{
|
|
|
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
|
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
|
|
|
if (h->dynindx == -1
|
|
|
|
|
&& (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
|
|
|
|
|
{
|
|
|
|
|
if (! bfd_elf64_link_record_dynamic_symbol (info, h))
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* If that succeeded, we know we'll be keeping all the
|
|
|
|
|
relocs. */
|
|
|
|
|
if (h->dynindx != -1)
|
|
|
|
|
goto keep;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
eh->dyn_relocs = NULL;
|
|
|
|
|
|
|
|
|
|
keep: ;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Finally, allocate space. */
|
|
|
|
|
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
|
|
|
|
{
|
|
|
|
|
asection *sreloc = elf_section_data (p->sec)->sreloc;
|
|
|
|
|
sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Find any dynamic relocs that apply to read-only sections. */
|
|
|
|
|
|
|
|
|
|
static boolean
|
|
|
|
|
readonly_dynrelocs (h, inf)
|
|
|
|
|
struct elf_link_hash_entry *h;
|
|
|
|
|
PTR inf;
|
|
|
|
|
{
|
|
|
|
|
struct elf64_x86_64_link_hash_entry *eh;
|
|
|
|
|
struct elf64_x86_64_dyn_relocs *p;
|
|
|
|
|
|
2002-03-28 04:27:46 +01:00
|
|
|
|
if (h->root.type == bfd_link_hash_warning)
|
|
|
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
eh = (struct elf64_x86_64_link_hash_entry *) h;
|
|
|
|
|
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
|
|
|
|
{
|
|
|
|
|
asection *s = p->sec->output_section;
|
|
|
|
|
|
|
|
|
|
if (s != NULL && (s->flags & SEC_READONLY) != 0)
|
|
|
|
|
{
|
|
|
|
|
struct bfd_link_info *info = (struct bfd_link_info *) inf;
|
|
|
|
|
|
|
|
|
|
info->flags |= DF_TEXTREL;
|
|
|
|
|
|
|
|
|
|
/* Not an error, just cut short the traversal. */
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
/* Set the sizes of the dynamic sections. */
|
|
|
|
|
|
|
|
|
|
static boolean
|
|
|
|
|
elf64_x86_64_size_dynamic_sections (output_bfd, info)
|
2001-08-23 20:14:29 +02:00
|
|
|
|
bfd *output_bfd ATTRIBUTE_UNUSED;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
struct bfd_link_info *info;
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct elf64_x86_64_link_hash_table *htab;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
bfd *dynobj;
|
|
|
|
|
asection *s;
|
|
|
|
|
boolean relocs;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
bfd *ibfd;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab = elf64_x86_64_hash_table (info);
|
|
|
|
|
dynobj = htab->elf.dynobj;
|
|
|
|
|
if (dynobj == NULL)
|
|
|
|
|
abort ();
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (htab->elf.dynamic_sections_created)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
|
|
|
|
/* Set the contents of the .interp section to the interpreter. */
|
|
|
|
|
if (! info->shared)
|
|
|
|
|
{
|
|
|
|
|
s = bfd_get_section_by_name (dynobj, ".interp");
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (s == NULL)
|
|
|
|
|
abort ();
|
2001-01-23 11:49:50 +01:00
|
|
|
|
s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
|
|
|
|
|
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* Set up .got offsets for local syms, and space for local dynamic
|
|
|
|
|
relocs. */
|
|
|
|
|
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
bfd_signed_vma *local_got;
|
|
|
|
|
bfd_signed_vma *end_local_got;
|
|
|
|
|
bfd_size_type locsymcount;
|
|
|
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
|
|
|
asection *srel;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
continue;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
for (s = ibfd->sections; s != NULL; s = s->next)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct elf64_x86_64_dyn_relocs *p;
|
|
|
|
|
|
|
|
|
|
for (p = *((struct elf64_x86_64_dyn_relocs **)
|
|
|
|
|
&elf_section_data (s)->local_dynrel);
|
|
|
|
|
p != NULL;
|
|
|
|
|
p = p->next)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (!bfd_is_abs_section (p->sec)
|
|
|
|
|
&& bfd_is_abs_section (p->sec->output_section))
|
|
|
|
|
{
|
|
|
|
|
/* Input section has been discarded, either because
|
|
|
|
|
it is a copy of a linkonce section or due to
|
|
|
|
|
linker script /DISCARD/, so we'll be discarding
|
|
|
|
|
the relocs too. */
|
|
|
|
|
}
|
|
|
|
|
else if (p->count != 0)
|
|
|
|
|
{
|
|
|
|
|
srel = elf_section_data (p->sec)->sreloc;
|
|
|
|
|
srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
|
|
|
|
|
if ((p->sec->output_section->flags & SEC_READONLY) != 0)
|
|
|
|
|
info->flags |= DF_TEXTREL;
|
|
|
|
|
|
|
|
|
|
}
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
2002-02-21 16:31:53 +01:00
|
|
|
|
|
|
|
|
|
local_got = elf_local_got_refcounts (ibfd);
|
|
|
|
|
if (!local_got)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
|
|
|
|
locsymcount = symtab_hdr->sh_info;
|
|
|
|
|
end_local_got = local_got + locsymcount;
|
|
|
|
|
s = htab->sgot;
|
|
|
|
|
srel = htab->srelgot;
|
|
|
|
|
for (; local_got < end_local_got; ++local_got)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (*local_got > 0)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
*local_got = s->_raw_size;
|
|
|
|
|
s->_raw_size += GOT_ENTRY_SIZE;
|
|
|
|
|
if (info->shared)
|
|
|
|
|
srel->_raw_size += sizeof (Elf64_External_Rela);
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
else
|
2002-02-21 16:31:53 +01:00
|
|
|
|
*local_got = (bfd_vma) -1;
|
|
|
|
|
}
|
|
|
|
|
}
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* Allocate global sym .plt and .got entries, and space for global
|
|
|
|
|
sym dynamic relocs. */
|
|
|
|
|
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
|
|
|
|
|
|
|
|
|
|
/* We now have determined the sizes of the various dynamic sections.
|
|
|
|
|
Allocate memory for them. */
|
|
|
|
|
relocs = false;
|
|
|
|
|
for (s = dynobj->sections; s != NULL; s = s->next)
|
|
|
|
|
{
|
|
|
|
|
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
if (s == htab->splt
|
|
|
|
|
|| s == htab->sgot
|
|
|
|
|
|| s == htab->sgotplt)
|
|
|
|
|
{
|
|
|
|
|
/* Strip this section if we don't need it; see the
|
|
|
|
|
comment below. */
|
|
|
|
|
}
|
|
|
|
|
else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
|
|
|
|
|
{
|
|
|
|
|
if (s->_raw_size != 0 && s != htab->srelplt)
|
|
|
|
|
relocs = true;
|
|
|
|
|
|
|
|
|
|
/* We use the reloc_count field as a counter if we need
|
|
|
|
|
to copy relocs into the output file. */
|
|
|
|
|
s->reloc_count = 0;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
2002-02-21 16:31:53 +01:00
|
|
|
|
else
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
|
|
|
|
/* It's not one of our sections, so don't allocate space. */
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (s->_raw_size == 0)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* If we don't need this section, strip it from the
|
|
|
|
|
output file. This is mostly to handle .rela.bss and
|
|
|
|
|
.rela.plt. We must create both sections in
|
|
|
|
|
create_dynamic_sections, because they must be created
|
|
|
|
|
before the linker maps input sections to output
|
|
|
|
|
sections. The linker does that before
|
|
|
|
|
adjust_dynamic_symbol is called, and it is that
|
|
|
|
|
function which decides whether anything needs to go
|
|
|
|
|
into these sections. */
|
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
_bfd_strip_section_from_output (info, s);
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Allocate memory for the section contents. We use bfd_zalloc
|
|
|
|
|
here in case unused entries are not reclaimed before the
|
|
|
|
|
section's contents are written out. This should not happen,
|
|
|
|
|
but this way if it does, we get a R_X86_64_NONE reloc instead
|
|
|
|
|
of garbage. */
|
|
|
|
|
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (s->contents == NULL)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (htab->elf.dynamic_sections_created)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
|
|
|
|
/* Add some entries to the .dynamic section. We fill in the
|
|
|
|
|
values later, in elf64_x86_64_finish_dynamic_sections, but we
|
|
|
|
|
must add the entries now so that we get the correct size for
|
2001-02-14 11:57:47 +01:00
|
|
|
|
the .dynamic section. The DT_DEBUG entry is filled in by the
|
2001-01-23 11:49:50 +01:00
|
|
|
|
dynamic linker and used by the debugger. */
|
Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 11:57:26 +02:00
|
|
|
|
#define add_dynamic_entry(TAG, VAL) \
|
|
|
|
|
bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
|
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
if (! info->shared)
|
|
|
|
|
{
|
Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 11:57:26 +02:00
|
|
|
|
if (!add_dynamic_entry (DT_DEBUG, 0))
|
2001-01-23 11:49:50 +01:00
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (htab->splt->_raw_size != 0)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 11:57:26 +02:00
|
|
|
|
if (!add_dynamic_entry (DT_PLTGOT, 0)
|
|
|
|
|
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
|
|
|
|
|
|| !add_dynamic_entry (DT_PLTREL, DT_RELA)
|
|
|
|
|
|| !add_dynamic_entry (DT_JMPREL, 0))
|
2001-01-23 11:49:50 +01:00
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (relocs)
|
|
|
|
|
{
|
Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 11:57:26 +02:00
|
|
|
|
if (!add_dynamic_entry (DT_RELA, 0)
|
|
|
|
|
|| !add_dynamic_entry (DT_RELASZ, 0)
|
|
|
|
|
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
|
2001-01-23 11:49:50 +01:00
|
|
|
|
return false;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* If any dynamic relocs apply to a read-only section,
|
|
|
|
|
then we need a DT_TEXTREL entry. */
|
|
|
|
|
if ((info->flags & DF_TEXTREL) == 0)
|
|
|
|
|
elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
|
|
|
|
|
(PTR) info);
|
|
|
|
|
|
|
|
|
|
if ((info->flags & DF_TEXTREL) != 0)
|
|
|
|
|
{
|
|
|
|
|
if (!add_dynamic_entry (DT_TEXTREL, 0))
|
|
|
|
|
return false;
|
|
|
|
|
}
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 11:57:26 +02:00
|
|
|
|
#undef add_dynamic_entry
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
2000-11-30 20:16:54 +01:00
|
|
|
|
/* Relocate an x86_64 ELF section. */
|
|
|
|
|
|
|
|
|
|
static boolean
|
|
|
|
|
elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section,
|
2001-04-23 10:00:14 +02:00
|
|
|
|
contents, relocs, local_syms, local_sections)
|
2000-11-30 20:16:54 +01:00
|
|
|
|
bfd *output_bfd;
|
|
|
|
|
struct bfd_link_info *info;
|
|
|
|
|
bfd *input_bfd;
|
|
|
|
|
asection *input_section;
|
|
|
|
|
bfd_byte *contents;
|
|
|
|
|
Elf_Internal_Rela *relocs;
|
|
|
|
|
Elf_Internal_Sym *local_syms;
|
|
|
|
|
asection **local_sections;
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct elf64_x86_64_link_hash_table *htab;
|
2000-11-30 20:16:54 +01:00
|
|
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
|
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
|
|
|
bfd_vma *local_got_offsets;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
Elf_Internal_Rela *rel;
|
2000-11-30 20:16:54 +01:00
|
|
|
|
Elf_Internal_Rela *relend;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab = elf64_x86_64_hash_table (info);
|
2000-11-30 20:16:54 +01:00
|
|
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
|
|
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
|
|
|
|
local_got_offsets = elf_local_got_offsets (input_bfd);
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
rel = relocs;
|
2000-11-30 20:16:54 +01:00
|
|
|
|
relend = relocs + input_section->reloc_count;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
for (; rel < relend; rel++)
|
2000-11-30 20:16:54 +01:00
|
|
|
|
{
|
|
|
|
|
int r_type;
|
|
|
|
|
reloc_howto_type *howto;
|
|
|
|
|
unsigned long r_symndx;
|
|
|
|
|
struct elf_link_hash_entry *h;
|
|
|
|
|
Elf_Internal_Sym *sym;
|
|
|
|
|
asection *sec;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
bfd_vma off;
|
2000-11-30 20:16:54 +01:00
|
|
|
|
bfd_vma relocation;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
boolean unresolved_reloc;
|
2000-11-30 20:16:54 +01:00
|
|
|
|
bfd_reloc_status_type r;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
r_type = ELF64_R_TYPE (rel->r_info);
|
2001-04-23 10:00:14 +02:00
|
|
|
|
if (r_type == (int) R_X86_64_GNU_VTINHERIT
|
|
|
|
|
|| r_type == (int) R_X86_64_GNU_VTENTRY)
|
|
|
|
|
continue;
|
2000-11-30 20:16:54 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (r_type < 0 || r_type >= R_X86_64_max)
|
2000-12-07 20:31:48 +01:00
|
|
|
|
{
|
|
|
|
|
bfd_set_error (bfd_error_bad_value);
|
|
|
|
|
return false;
|
|
|
|
|
}
|
2002-02-21 16:31:53 +01:00
|
|
|
|
howto = x86_64_elf_howto_table + r_type;
|
2000-11-30 20:16:54 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
r_symndx = ELF64_R_SYM (rel->r_info);
|
2000-11-30 20:16:54 +01:00
|
|
|
|
|
|
|
|
|
if (info->relocateable)
|
2000-12-07 20:31:48 +01:00
|
|
|
|
{
|
|
|
|
|
/* This is a relocateable link. We don't have to change
|
|
|
|
|
anything, unless the reloc is against a section symbol,
|
|
|
|
|
in which case we have to adjust according to where the
|
|
|
|
|
section symbol winds up in the output section. */
|
|
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
|
|
|
{
|
|
|
|
|
sym = local_syms + r_symndx;
|
|
|
|
|
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
|
|
|
|
{
|
|
|
|
|
sec = local_sections[r_symndx];
|
2002-02-21 16:31:53 +01:00
|
|
|
|
rel->r_addend += sec->output_offset + sym->st_value;
|
2000-12-07 20:31:48 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
continue;
|
|
|
|
|
}
|
2000-11-30 20:16:54 +01:00
|
|
|
|
|
2001-02-14 11:57:47 +01:00
|
|
|
|
/* This is a final link. */
|
2000-11-30 20:16:54 +01:00
|
|
|
|
h = NULL;
|
|
|
|
|
sym = NULL;
|
|
|
|
|
sec = NULL;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
unresolved_reloc = false;
|
2000-11-30 20:16:54 +01:00
|
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
2000-12-07 20:31:48 +01:00
|
|
|
|
{
|
|
|
|
|
sym = local_syms + r_symndx;
|
|
|
|
|
sec = local_sections[r_symndx];
|
2002-02-21 16:31:53 +01:00
|
|
|
|
|
|
|
|
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
|
2000-12-07 20:31:48 +01:00
|
|
|
|
}
|
2000-11-30 20:16:54 +01:00
|
|
|
|
else
|
2000-12-07 20:31:48 +01:00
|
|
|
|
{
|
|
|
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
|
|
|
while (h->root.type == bfd_link_hash_indirect
|
|
|
|
|
|| h->root.type == bfd_link_hash_warning)
|
|
|
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
|
2000-12-07 20:31:48 +01:00
|
|
|
|
if (h->root.type == bfd_link_hash_defined
|
|
|
|
|
|| h->root.type == bfd_link_hash_defweak)
|
|
|
|
|
{
|
|
|
|
|
sec = h->root.u.def.section;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (sec->output_section == NULL)
|
2000-12-07 20:31:48 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* Set a flag that will be cleared later if we find a
|
|
|
|
|
relocation value for this symbol. output_section
|
|
|
|
|
is typically NULL for symbols satisfied by a shared
|
|
|
|
|
library. */
|
|
|
|
|
unresolved_reloc = true;
|
2000-12-07 20:31:48 +01:00
|
|
|
|
relocation = 0;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
relocation = (h->root.u.def.value
|
|
|
|
|
+ sec->output_section->vma
|
|
|
|
|
+ sec->output_offset);
|
|
|
|
|
}
|
|
|
|
|
else if (h->root.type == bfd_link_hash_undefweak)
|
|
|
|
|
relocation = 0;
|
2001-09-20 12:37:35 +02:00
|
|
|
|
else if (info->shared
|
|
|
|
|
&& (!info->symbolic || info->allow_shlib_undefined)
|
|
|
|
|
&& !info->no_undefined
|
2001-01-23 11:49:50 +01:00
|
|
|
|
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
|
|
|
|
|
relocation = 0;
|
2000-12-07 20:31:48 +01:00
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
if (! ((*info->callbacks->undefined_symbol)
|
|
|
|
|
(info, h->root.root.string, input_bfd,
|
2002-02-21 16:31:53 +01:00
|
|
|
|
input_section, rel->r_offset,
|
2000-12-07 20:31:48 +01:00
|
|
|
|
(!info->shared || info->no_undefined
|
|
|
|
|
|| ELF_ST_VISIBILITY (h->other)))))
|
|
|
|
|
return false;
|
|
|
|
|
relocation = 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
2001-01-23 11:49:50 +01:00
|
|
|
|
/* When generating a shared object, the relocations handled here are
|
|
|
|
|
copied into the output file to be resolved at run time. */
|
|
|
|
|
switch (r_type)
|
|
|
|
|
{
|
|
|
|
|
case R_X86_64_GOT32:
|
|
|
|
|
/* Relocation is to the entry for this symbol in the global
|
|
|
|
|
offset table. */
|
|
|
|
|
case R_X86_64_GOTPCREL:
|
|
|
|
|
/* Use global offset table as symbol value. */
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (htab->sgot == NULL)
|
|
|
|
|
abort ();
|
2001-04-29 15:42:45 +02:00
|
|
|
|
|
2001-02-12 17:54:08 +01:00
|
|
|
|
if (h != NULL)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
boolean dyn;
|
|
|
|
|
|
|
|
|
|
off = h->got.offset;
|
|
|
|
|
dyn = htab->elf.dynamic_sections_created;
|
2001-02-12 17:54:08 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
|
2001-02-12 17:54:08 +01:00
|
|
|
|
|| (info->shared
|
2002-02-21 16:31:53 +01:00
|
|
|
|
&& (info->symbolic
|
|
|
|
|
|| h->dynindx == -1
|
|
|
|
|
|| (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
|
2001-02-12 17:54:08 +01:00
|
|
|
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
|
|
|
|
|
{
|
|
|
|
|
/* This is actually a static link, or it is a -Bsymbolic
|
|
|
|
|
link and the symbol is defined locally, or the symbol
|
2001-02-14 11:57:47 +01:00
|
|
|
|
was forced to be local because of a version file. We
|
2001-02-12 17:54:08 +01:00
|
|
|
|
must initialize this entry in the global offset table.
|
|
|
|
|
Since the offset must always be a multiple of 8, we
|
|
|
|
|
use the least significant bit to record whether we
|
|
|
|
|
have initialized it already.
|
|
|
|
|
|
|
|
|
|
When doing a dynamic link, we create a .rela.got
|
2001-02-14 11:57:47 +01:00
|
|
|
|
relocation entry to initialize the value. This is
|
|
|
|
|
done in the finish_dynamic_symbol routine. */
|
2001-02-12 17:54:08 +01:00
|
|
|
|
if ((off & 1) != 0)
|
|
|
|
|
off &= ~1;
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
bfd_put_64 (output_bfd, relocation,
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab->sgot->contents + off);
|
2001-02-12 17:54:08 +01:00
|
|
|
|
h->got.offset |= 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
2001-04-29 15:42:45 +02:00
|
|
|
|
else
|
2002-02-21 16:31:53 +01:00
|
|
|
|
unresolved_reloc = false;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
2001-02-12 17:54:08 +01:00
|
|
|
|
else
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (local_got_offsets == NULL)
|
|
|
|
|
abort ();
|
2001-02-12 17:54:08 +01:00
|
|
|
|
|
|
|
|
|
off = local_got_offsets[r_symndx];
|
|
|
|
|
|
|
|
|
|
/* The offset must always be a multiple of 8. We use
|
2001-02-14 11:57:47 +01:00
|
|
|
|
the least significant bit to record whether we have
|
|
|
|
|
already generated the necessary reloc. */
|
2001-02-12 17:54:08 +01:00
|
|
|
|
if ((off & 1) != 0)
|
|
|
|
|
off &= ~1;
|
|
|
|
|
else
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
bfd_put_64 (output_bfd, relocation,
|
|
|
|
|
htab->sgot->contents + off);
|
2001-02-12 17:54:08 +01:00
|
|
|
|
|
|
|
|
|
if (info->shared)
|
|
|
|
|
{
|
|
|
|
|
asection *srelgot;
|
|
|
|
|
Elf_Internal_Rela outrel;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
Elf64_External_Rela *loc;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2001-02-12 17:54:08 +01:00
|
|
|
|
/* We need to generate a R_X86_64_RELATIVE reloc
|
|
|
|
|
for the dynamic linker. */
|
2002-02-21 16:31:53 +01:00
|
|
|
|
srelgot = htab->srelgot;
|
|
|
|
|
if (srelgot == NULL)
|
|
|
|
|
abort ();
|
2001-02-12 17:54:08 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
outrel.r_offset = (htab->sgot->output_section->vma
|
|
|
|
|
+ htab->sgot->output_offset
|
2001-02-12 17:54:08 +01:00
|
|
|
|
+ off);
|
|
|
|
|
outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
|
|
|
|
|
outrel.r_addend = relocation;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
loc = (Elf64_External_Rela *) srelgot->contents;
|
|
|
|
|
loc += srelgot->reloc_count++;
|
|
|
|
|
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
|
2001-02-12 17:54:08 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
local_got_offsets[r_symndx] |= 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
2001-04-30 12:30:05 +02:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (off >= (bfd_vma) -2)
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
relocation = htab->sgot->output_offset + off;
|
|
|
|
|
if (r_type == R_X86_64_GOTPCREL)
|
|
|
|
|
relocation += htab->sgot->output_section->vma;
|
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case R_X86_64_PLT32:
|
|
|
|
|
/* Relocation is to the entry for this symbol in the
|
|
|
|
|
procedure linkage table. */
|
|
|
|
|
|
|
|
|
|
/* Resolve a PLT32 reloc against a local symbol directly,
|
2001-02-14 11:57:47 +01:00
|
|
|
|
without using the procedure linkage table. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
if (h == NULL)
|
|
|
|
|
break;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (h->plt.offset == (bfd_vma) -1
|
|
|
|
|
|| htab->splt == NULL)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
|
|
|
|
/* We didn't make a PLT entry for this symbol. This
|
2001-02-14 11:57:47 +01:00
|
|
|
|
happens when statically linking PIC code, or when
|
|
|
|
|
using -Bsymbolic. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
relocation = (htab->splt->output_section->vma
|
|
|
|
|
+ htab->splt->output_offset
|
2001-01-23 11:49:50 +01:00
|
|
|
|
+ h->plt.offset);
|
2002-02-21 16:31:53 +01:00
|
|
|
|
unresolved_reloc = false;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
break;
|
|
|
|
|
|
2001-06-19 15:30:40 +02:00
|
|
|
|
case R_X86_64_PC8:
|
|
|
|
|
case R_X86_64_PC16:
|
|
|
|
|
case R_X86_64_PC32:
|
2001-01-23 11:49:50 +01:00
|
|
|
|
case R_X86_64_8:
|
|
|
|
|
case R_X86_64_16:
|
|
|
|
|
case R_X86_64_32:
|
2001-05-30 20:44:46 +02:00
|
|
|
|
case R_X86_64_64:
|
2001-06-01 13:52:11 +02:00
|
|
|
|
/* FIXME: The ABI says the linker should make sure the value is
|
2001-02-14 11:57:47 +01:00
|
|
|
|
the same when it's zeroextended to 64 bit. */
|
2002-02-21 16:31:53 +01:00
|
|
|
|
|
|
|
|
|
/* r_symndx will be zero only for relocs against symbols
|
|
|
|
|
from removed linkonce sections, or sections discarded by
|
|
|
|
|
a linker script. */
|
|
|
|
|
if (r_symndx == 0
|
|
|
|
|
|| (input_section->flags & SEC_ALLOC) == 0)
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
if ((info->shared
|
|
|
|
|
&& ((r_type != R_X86_64_PC8
|
|
|
|
|
&& r_type != R_X86_64_PC16
|
|
|
|
|
&& r_type != R_X86_64_PC32)
|
|
|
|
|
|| (h != NULL
|
|
|
|
|
&& h->dynindx != -1
|
|
|
|
|
&& (! info->symbolic
|
|
|
|
|
|| (h->elf_link_hash_flags
|
|
|
|
|
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|
|
|
|
|
|| (!info->shared
|
|
|
|
|
&& h != NULL
|
|
|
|
|
&& h->dynindx != -1
|
|
|
|
|
&& (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
|
|
|
|
|
&& (((h->elf_link_hash_flags
|
|
|
|
|
& ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
|
|
|
|
&& (h->elf_link_hash_flags
|
|
|
|
|
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|
|
|
|
|
|| h->root.type == bfd_link_hash_undefweak
|
|
|
|
|
|| h->root.type == bfd_link_hash_undefined)))
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
|
|
|
|
Elf_Internal_Rela outrel;
|
|
|
|
|
boolean skip, relocate;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
asection *sreloc;
|
|
|
|
|
Elf64_External_Rela *loc;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* When generating a shared object, these relocations
|
|
|
|
|
are copied into the output file to be resolved at run
|
2001-02-14 11:57:47 +01:00
|
|
|
|
time. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
skip = false;
|
2002-02-19 13:40:32 +01:00
|
|
|
|
relocate = false;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2001-12-07 12:12:18 +01:00
|
|
|
|
outrel.r_offset =
|
|
|
|
|
_bfd_elf_section_offset (output_bfd, info, input_section,
|
2002-02-21 16:31:53 +01:00
|
|
|
|
rel->r_offset);
|
2001-12-07 12:12:18 +01:00
|
|
|
|
if (outrel.r_offset == (bfd_vma) -1)
|
|
|
|
|
skip = true;
|
2002-02-22 11:03:03 +01:00
|
|
|
|
else if (outrel.r_offset == (bfd_vma) -2)
|
2002-02-19 13:40:32 +01:00
|
|
|
|
skip = true, relocate = true;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
outrel.r_offset += (input_section->output_section->vma
|
|
|
|
|
+ input_section->output_offset);
|
|
|
|
|
|
|
|
|
|
if (skip)
|
2002-02-19 13:40:32 +01:00
|
|
|
|
memset (&outrel, 0, sizeof outrel);
|
2002-02-21 16:31:53 +01:00
|
|
|
|
|
2001-06-19 15:30:40 +02:00
|
|
|
|
/* h->dynindx may be -1 if this symbol was marked to
|
|
|
|
|
become local. */
|
|
|
|
|
else if (h != NULL
|
2002-02-21 16:31:53 +01:00
|
|
|
|
&& h->dynindx != -1
|
|
|
|
|
&& (r_type == R_X86_64_PC8
|
|
|
|
|
|| r_type == R_X86_64_PC16
|
|
|
|
|
|| r_type == R_X86_64_PC32
|
|
|
|
|
|| !info->shared
|
|
|
|
|
|| !info->symbolic
|
2001-06-19 15:30:40 +02:00
|
|
|
|
|| (h->elf_link_hash_flags
|
|
|
|
|
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
|
|
|
|
outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
|
2002-02-21 16:31:53 +01:00
|
|
|
|
outrel.r_addend = rel->r_addend;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* This symbol is local, or marked to become local. */
|
|
|
|
|
relocate = true;
|
|
|
|
|
outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
|
|
|
|
|
outrel.r_addend = relocation + rel->r_addend;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
sreloc = elf_section_data (input_section)->sreloc;
|
|
|
|
|
if (sreloc == NULL)
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
loc = (Elf64_External_Rela *) sreloc->contents;
|
|
|
|
|
loc += sreloc->reloc_count++;
|
|
|
|
|
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* If this reloc is against an external symbol, we do
|
|
|
|
|
not want to fiddle with the addend. Otherwise, we
|
|
|
|
|
need to include the symbol value so that it becomes
|
|
|
|
|
an addend for the dynamic reloc. */
|
|
|
|
|
if (! relocate)
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
2000-11-30 20:16:54 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* FIXME: Why do we allow debugging sections to escape this error?
|
|
|
|
|
More importantly, why do we not emit dynamic relocs for
|
|
|
|
|
R_386_32 above in debugging sections (which are ! SEC_ALLOC)?
|
|
|
|
|
If we had emitted the dynamic reloc, we could remove the
|
|
|
|
|
fudge here. */
|
|
|
|
|
if (unresolved_reloc
|
|
|
|
|
&& !(info->shared
|
|
|
|
|
&& (input_section->flags & SEC_DEBUGGING) != 0
|
|
|
|
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
|
|
|
|
|
(*_bfd_error_handler)
|
|
|
|
|
(_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
|
|
|
|
|
bfd_archive_filename (input_bfd),
|
|
|
|
|
bfd_get_section_name (input_bfd, input_section),
|
|
|
|
|
(long) rel->r_offset,
|
|
|
|
|
h->root.root.string);
|
|
|
|
|
|
2000-11-30 20:16:54 +01:00
|
|
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
2002-02-21 16:31:53 +01:00
|
|
|
|
contents, rel->r_offset,
|
|
|
|
|
relocation, rel->r_addend);
|
2000-11-30 20:16:54 +01:00
|
|
|
|
|
|
|
|
|
if (r != bfd_reloc_ok)
|
2000-12-07 20:31:48 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
const char *name;
|
|
|
|
|
|
|
|
|
|
if (h != NULL)
|
|
|
|
|
name = h->root.root.string;
|
|
|
|
|
else
|
2000-12-07 20:31:48 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
name = bfd_elf_string_from_elf_section (input_bfd,
|
|
|
|
|
symtab_hdr->sh_link,
|
|
|
|
|
sym->st_name);
|
|
|
|
|
if (name == NULL)
|
|
|
|
|
return false;
|
|
|
|
|
if (*name == '\0')
|
|
|
|
|
name = bfd_section_name (input_bfd, sec);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (r == bfd_reloc_overflow)
|
|
|
|
|
{
|
|
|
|
|
|
|
|
|
|
if (! ((*info->callbacks->reloc_overflow)
|
|
|
|
|
(info, name, howto->name, (bfd_vma) 0,
|
|
|
|
|
input_bfd, input_section, rel->r_offset)))
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
(*_bfd_error_handler)
|
|
|
|
|
(_("%s(%s+0x%lx): reloc against `%s': error %d"),
|
|
|
|
|
bfd_archive_filename (input_bfd),
|
|
|
|
|
bfd_get_section_name (input_bfd, input_section),
|
|
|
|
|
(long) rel->r_offset, name, (int) r);
|
|
|
|
|
return false;
|
2000-12-07 20:31:48 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
2000-11-30 20:16:54 +01:00
|
|
|
|
}
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Finish up dynamic symbol handling. We set the contents of various
|
|
|
|
|
dynamic sections here. */
|
|
|
|
|
|
|
|
|
|
static boolean
|
|
|
|
|
elf64_x86_64_finish_dynamic_symbol (output_bfd, info, h, sym)
|
|
|
|
|
bfd *output_bfd;
|
|
|
|
|
struct bfd_link_info *info;
|
|
|
|
|
struct elf_link_hash_entry *h;
|
|
|
|
|
Elf_Internal_Sym *sym;
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct elf64_x86_64_link_hash_table *htab;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab = elf64_x86_64_hash_table (info);
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
if (h->plt.offset != (bfd_vma) -1)
|
|
|
|
|
{
|
|
|
|
|
bfd_vma plt_index;
|
|
|
|
|
bfd_vma got_offset;
|
|
|
|
|
Elf_Internal_Rela rela;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
Elf64_External_Rela *loc;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* This symbol has an entry in the procedure linkage table. Set
|
2001-02-14 11:57:47 +01:00
|
|
|
|
it up. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (h->dynindx == -1
|
|
|
|
|
|| htab->splt == NULL
|
|
|
|
|
|| htab->sgotplt == NULL
|
|
|
|
|
|| htab->srelplt == NULL)
|
|
|
|
|
abort ();
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* Get the index in the procedure linkage table which
|
|
|
|
|
corresponds to this symbol. This is the index of this symbol
|
|
|
|
|
in all the symbols for which we are making plt entries. The
|
|
|
|
|
first entry in the procedure linkage table is reserved. */
|
|
|
|
|
plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
|
|
|
|
|
|
|
|
|
|
/* Get the offset into the .got table of the entry that
|
2001-02-14 11:57:47 +01:00
|
|
|
|
corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
|
2001-04-23 10:00:14 +02:00
|
|
|
|
bytes. The first three are reserved for the dynamic linker. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
|
|
|
|
|
|
|
|
|
|
/* Fill in the entry in the procedure linkage table. */
|
2002-02-21 16:31:53 +01:00
|
|
|
|
memcpy (htab->splt->contents + h->plt.offset, elf64_x86_64_plt_entry,
|
2001-01-23 11:49:50 +01:00
|
|
|
|
PLT_ENTRY_SIZE);
|
|
|
|
|
|
|
|
|
|
/* Insert the relocation positions of the plt section. The magic
|
|
|
|
|
numbers at the end of the statements are the positions of the
|
|
|
|
|
relocations in the plt section. */
|
2001-04-19 11:39:28 +02:00
|
|
|
|
/* Put offset for jmp *name@GOTPCREL(%rip), since the
|
|
|
|
|
instruction uses 6 bytes, subtract this value. */
|
|
|
|
|
bfd_put_32 (output_bfd,
|
2002-02-21 16:31:53 +01:00
|
|
|
|
(htab->sgotplt->output_section->vma
|
|
|
|
|
+ htab->sgotplt->output_offset
|
2001-04-19 11:39:28 +02:00
|
|
|
|
+ got_offset
|
2002-02-21 16:31:53 +01:00
|
|
|
|
- htab->splt->output_section->vma
|
|
|
|
|
- htab->splt->output_offset
|
2001-04-19 11:39:28 +02:00
|
|
|
|
- h->plt.offset
|
|
|
|
|
- 6),
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab->splt->contents + h->plt.offset + 2);
|
2001-04-19 11:39:28 +02:00
|
|
|
|
/* Put relocation index. */
|
|
|
|
|
bfd_put_32 (output_bfd, plt_index,
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab->splt->contents + h->plt.offset + 7);
|
2001-04-19 11:39:28 +02:00
|
|
|
|
/* Put offset for jmp .PLT0. */
|
|
|
|
|
bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab->splt->contents + h->plt.offset + 12);
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2001-04-19 11:39:28 +02:00
|
|
|
|
/* Fill in the entry in the global offset table, initially this
|
|
|
|
|
points to the pushq instruction in the PLT which is at offset 6. */
|
2002-02-21 16:31:53 +01:00
|
|
|
|
bfd_put_64 (output_bfd, (htab->splt->output_section->vma
|
|
|
|
|
+ htab->splt->output_offset
|
2001-01-23 11:49:50 +01:00
|
|
|
|
+ h->plt.offset + 6),
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab->sgotplt->contents + got_offset);
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* Fill in the entry in the .rela.plt section. */
|
2002-02-21 16:31:53 +01:00
|
|
|
|
rela.r_offset = (htab->sgotplt->output_section->vma
|
|
|
|
|
+ htab->sgotplt->output_offset
|
2001-01-23 11:49:50 +01:00
|
|
|
|
+ got_offset);
|
|
|
|
|
rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT);
|
|
|
|
|
rela.r_addend = 0;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
loc = (Elf64_External_Rela *) htab->srelplt->contents + plt_index;
|
|
|
|
|
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
|
|
|
|
{
|
|
|
|
|
/* Mark the symbol as undefined, rather than as defined in
|
2002-02-21 16:31:53 +01:00
|
|
|
|
the .plt section. Leave the value alone. This is a clue
|
|
|
|
|
for the dynamic linker, to make function pointer
|
|
|
|
|
comparisons work between an application and shared
|
|
|
|
|
library. */
|
2001-01-23 11:49:50 +01:00
|
|
|
|
sym->st_shndx = SHN_UNDEF;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2001-04-29 15:42:45 +02:00
|
|
|
|
if (h->got.offset != (bfd_vma) -1)
|
|
|
|
|
{
|
|
|
|
|
Elf_Internal_Rela rela;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
Elf64_External_Rela *loc;
|
2001-04-29 15:42:45 +02:00
|
|
|
|
|
|
|
|
|
/* This symbol has an entry in the global offset table. Set it
|
|
|
|
|
up. */
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (htab->sgot == NULL || htab->srelgot == NULL)
|
|
|
|
|
abort ();
|
2001-04-29 15:42:45 +02:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
rela.r_offset = (htab->sgot->output_section->vma
|
|
|
|
|
+ htab->sgot->output_offset
|
Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 11:57:26 +02:00
|
|
|
|
+ (h->got.offset &~ (bfd_vma) 1));
|
2001-04-29 15:42:45 +02:00
|
|
|
|
|
|
|
|
|
/* If this is a static link, or it is a -Bsymbolic link and the
|
|
|
|
|
symbol is defined locally or was forced to be local because
|
|
|
|
|
of a version file, we just want to emit a RELATIVE reloc.
|
|
|
|
|
The entry in the global offset table will already have been
|
|
|
|
|
initialized in the relocate_section function. */
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (info->shared
|
|
|
|
|
&& (info->symbolic
|
|
|
|
|
|| h->dynindx == -1
|
|
|
|
|
|| (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
|
|
|
|
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
|
2001-04-29 15:42:45 +02:00
|
|
|
|
{
|
2001-06-07 16:45:36 +02:00
|
|
|
|
BFD_ASSERT((h->got.offset & 1) != 0);
|
2001-04-29 15:42:45 +02:00
|
|
|
|
rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
|
|
|
|
|
rela.r_addend = (h->root.u.def.value
|
|
|
|
|
+ h->root.u.def.section->output_section->vma
|
|
|
|
|
+ h->root.u.def.section->output_offset);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
BFD_ASSERT((h->got.offset & 1) == 0);
|
2002-02-21 16:31:53 +01:00
|
|
|
|
bfd_put_64 (output_bfd, (bfd_vma) 0,
|
|
|
|
|
htab->sgot->contents + h->got.offset);
|
2001-04-29 15:42:45 +02:00
|
|
|
|
rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT);
|
|
|
|
|
rela.r_addend = 0;
|
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
loc = (Elf64_External_Rela *) htab->srelgot->contents;
|
|
|
|
|
loc += htab->srelgot->reloc_count++;
|
|
|
|
|
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
|
2001-04-29 15:42:45 +02:00
|
|
|
|
}
|
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
|
|
|
|
|
{
|
|
|
|
|
Elf_Internal_Rela rela;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
Elf64_External_Rela *loc;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
/* This symbol needs a copy reloc. Set it up. */
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (h->dynindx == -1
|
|
|
|
|
|| (h->root.type != bfd_link_hash_defined
|
|
|
|
|
&& h->root.type != bfd_link_hash_defweak)
|
|
|
|
|
|| htab->srelbss == NULL)
|
|
|
|
|
abort ();
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
rela.r_offset = (h->root.u.def.value
|
|
|
|
|
+ h->root.u.def.section->output_section->vma
|
|
|
|
|
+ h->root.u.def.section->output_offset);
|
|
|
|
|
rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY);
|
|
|
|
|
rela.r_addend = 0;
|
2002-02-21 16:31:53 +01:00
|
|
|
|
loc = (Elf64_External_Rela *) htab->srelbss->contents;
|
|
|
|
|
loc += htab->srelbss->reloc_count++;
|
|
|
|
|
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
|
|
|
|
|
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|
|
|
|
|
|| strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
|
|
|
|
|
sym->st_shndx = SHN_ABS;
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* Used to decide how to sort relocs in an optimal manner for the
|
|
|
|
|
dynamic linker, before writing them out. */
|
|
|
|
|
|
|
|
|
|
static enum elf_reloc_type_class
|
|
|
|
|
elf64_x86_64_reloc_type_class (rela)
|
|
|
|
|
const Elf_Internal_Rela *rela;
|
|
|
|
|
{
|
|
|
|
|
switch ((int) ELF64_R_TYPE (rela->r_info))
|
|
|
|
|
{
|
|
|
|
|
case R_X86_64_RELATIVE:
|
|
|
|
|
return reloc_class_relative;
|
|
|
|
|
case R_X86_64_JUMP_SLOT:
|
|
|
|
|
return reloc_class_plt;
|
|
|
|
|
case R_X86_64_COPY:
|
|
|
|
|
return reloc_class_copy;
|
|
|
|
|
default:
|
|
|
|
|
return reloc_class_normal;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
/* Finish up the dynamic sections. */
|
|
|
|
|
|
|
|
|
|
static boolean
|
|
|
|
|
elf64_x86_64_finish_dynamic_sections (output_bfd, info)
|
|
|
|
|
bfd *output_bfd;
|
|
|
|
|
struct bfd_link_info *info;
|
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
struct elf64_x86_64_link_hash_table *htab;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
bfd *dynobj;
|
|
|
|
|
asection *sdyn;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab = elf64_x86_64_hash_table (info);
|
|
|
|
|
dynobj = htab->elf.dynobj;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (htab->elf.dynamic_sections_created)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
|
|
|
|
Elf64_External_Dyn *dyncon, *dynconend;
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (sdyn == NULL || htab->sgot == NULL)
|
|
|
|
|
abort ();
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
dyncon = (Elf64_External_Dyn *) sdyn->contents;
|
|
|
|
|
dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
|
|
|
|
|
for (; dyncon < dynconend; dyncon++)
|
|
|
|
|
{
|
|
|
|
|
Elf_Internal_Dyn dyn;
|
|
|
|
|
asection *s;
|
|
|
|
|
|
|
|
|
|
bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
|
|
|
|
|
|
|
|
|
|
switch (dyn.d_tag)
|
|
|
|
|
{
|
|
|
|
|
default:
|
2001-04-29 15:42:45 +02:00
|
|
|
|
continue;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
case DT_PLTGOT:
|
2002-02-21 16:31:53 +01:00
|
|
|
|
dyn.d_un.d_ptr = htab->sgot->output_section->vma;
|
|
|
|
|
break;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
case DT_JMPREL:
|
2002-02-21 16:31:53 +01:00
|
|
|
|
dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
|
|
|
|
|
break;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
case DT_PLTRELSZ:
|
|
|
|
|
s = htab->srelplt->output_section;
|
|
|
|
|
if (s->_cooked_size != 0)
|
|
|
|
|
dyn.d_un.d_val = s->_cooked_size;
|
|
|
|
|
else
|
|
|
|
|
dyn.d_un.d_val = s->_raw_size;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case DT_RELASZ:
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* The procedure linkage table relocs (DT_JMPREL) should
|
|
|
|
|
not be included in the overall relocs (DT_RELA).
|
|
|
|
|
Therefore, we override the DT_RELASZ entry here to
|
|
|
|
|
make it not include the JMPREL relocs. Since the
|
|
|
|
|
linker script arranges for .rela.plt to follow all
|
|
|
|
|
other relocation sections, we don't have to worry
|
|
|
|
|
about changing the DT_RELA entry. */
|
|
|
|
|
if (htab->srelplt != NULL)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
s = htab->srelplt->output_section;
|
|
|
|
|
if (s->_cooked_size != 0)
|
|
|
|
|
dyn.d_un.d_val -= s->_cooked_size;
|
|
|
|
|
else
|
|
|
|
|
dyn.d_un.d_val -= s->_raw_size;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
}
|
2002-02-21 16:31:53 +01:00
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
|
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* Fill in the special first entry in the procedure linkage table. */
|
|
|
|
|
if (htab->splt && htab->splt->_raw_size > 0)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2001-04-19 11:39:28 +02:00
|
|
|
|
/* Fill in the first entry in the procedure linkage table. */
|
2002-02-21 16:31:53 +01:00
|
|
|
|
memcpy (htab->splt->contents, elf64_x86_64_plt0_entry,
|
|
|
|
|
PLT_ENTRY_SIZE);
|
2001-04-19 11:39:28 +02:00
|
|
|
|
/* Add offset for pushq GOT+8(%rip), since the instruction
|
|
|
|
|
uses 6 bytes subtract this value. */
|
|
|
|
|
bfd_put_32 (output_bfd,
|
2002-02-21 16:31:53 +01:00
|
|
|
|
(htab->sgotplt->output_section->vma
|
|
|
|
|
+ htab->sgotplt->output_offset
|
2001-04-19 11:39:28 +02:00
|
|
|
|
+ 8
|
2002-02-21 16:31:53 +01:00
|
|
|
|
- htab->splt->output_section->vma
|
|
|
|
|
- htab->splt->output_offset
|
2001-04-19 11:39:28 +02:00
|
|
|
|
- 6),
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab->splt->contents + 2);
|
2001-04-19 11:39:28 +02:00
|
|
|
|
/* Add offset for jmp *GOT+16(%rip). The 12 is the offset to
|
|
|
|
|
the end of the instruction. */
|
|
|
|
|
bfd_put_32 (output_bfd,
|
2002-02-21 16:31:53 +01:00
|
|
|
|
(htab->sgotplt->output_section->vma
|
|
|
|
|
+ htab->sgotplt->output_offset
|
2001-04-19 11:39:28 +02:00
|
|
|
|
+ 16
|
2002-02-21 16:31:53 +01:00
|
|
|
|
- htab->splt->output_section->vma
|
|
|
|
|
- htab->splt->output_offset
|
2001-04-19 11:39:28 +02:00
|
|
|
|
- 12),
|
2002-02-21 16:31:53 +01:00
|
|
|
|
htab->splt->contents + 8);
|
2001-04-19 11:39:28 +02:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize =
|
|
|
|
|
PLT_ENTRY_SIZE;
|
2001-01-23 11:49:50 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
if (htab->sgotplt)
|
2001-01-23 11:49:50 +01:00
|
|
|
|
{
|
2002-02-21 16:31:53 +01:00
|
|
|
|
/* Fill in the first three entries in the global offset table. */
|
|
|
|
|
if (htab->sgotplt->_raw_size > 0)
|
|
|
|
|
{
|
|
|
|
|
/* Set the first entry in the global offset table to the address of
|
|
|
|
|
the dynamic section. */
|
|
|
|
|
if (sdyn == NULL)
|
|
|
|
|
bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents);
|
|
|
|
|
else
|
|
|
|
|
bfd_put_64 (output_bfd,
|
|
|
|
|
sdyn->output_section->vma + sdyn->output_offset,
|
|
|
|
|
htab->sgotplt->contents);
|
|
|
|
|
/* Write GOT[1] and GOT[2], needed for the dynamic linker. */
|
|
|
|
|
bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE);
|
|
|
|
|
bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE*2);
|
|
|
|
|
}
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2002-02-21 16:31:53 +01:00
|
|
|
|
elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize =
|
|
|
|
|
GOT_ENTRY_SIZE;
|
|
|
|
|
}
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
2000-11-30 20:16:54 +01:00
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
2001-08-23 20:14:29 +02:00
|
|
|
|
|
2001-01-23 11:49:50 +01:00
|
|
|
|
#define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
|
|
|
|
|
#define TARGET_LITTLE_NAME "elf64-x86-64"
|
|
|
|
|
#define ELF_ARCH bfd_arch_i386
|
|
|
|
|
#define ELF_MACHINE_CODE EM_X86_64
|
|
|
|
|
#define ELF_MAXPAGESIZE 0x100000
|
|
|
|
|
|
|
|
|
|
#define elf_backend_can_gc_sections 1
|
2001-09-29 08:21:59 +02:00
|
|
|
|
#define elf_backend_can_refcount 1
|
2001-01-23 11:49:50 +01:00
|
|
|
|
#define elf_backend_want_got_plt 1
|
|
|
|
|
#define elf_backend_plt_readonly 1
|
|
|
|
|
#define elf_backend_want_plt_sym 0
|
|
|
|
|
#define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
|
|
|
|
|
#define elf_backend_plt_header_size PLT_ENTRY_SIZE
|
|
|
|
|
|
|
|
|
|
#define elf_info_to_howto elf64_x86_64_info_to_howto
|
|
|
|
|
|
|
|
|
|
#define bfd_elf64_bfd_link_hash_table_create \
|
|
|
|
|
elf64_x86_64_link_hash_table_create
|
2001-02-14 11:57:47 +01:00
|
|
|
|
#define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup
|
2001-01-23 11:49:50 +01:00
|
|
|
|
|
|
|
|
|
#define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol
|
|
|
|
|
#define elf_backend_check_relocs elf64_x86_64_check_relocs
|
2002-02-21 16:31:53 +01:00
|
|
|
|
#define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol
|
|
|
|
|
#define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections
|
|
|
|
|
#define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections
|
2001-01-23 11:49:50 +01:00
|
|
|
|
#define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol
|
|
|
|
|
#define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook
|
|
|
|
|
#define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook
|
2002-02-21 16:31:53 +01:00
|
|
|
|
#define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class
|
2001-01-23 11:49:50 +01:00
|
|
|
|
#define elf_backend_relocate_section elf64_x86_64_relocate_section
|
|
|
|
|
#define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections
|
2001-02-14 11:57:47 +01:00
|
|
|
|
#define elf_backend_object_p elf64_x86_64_elf_object_p
|
2000-11-30 20:16:54 +01:00
|
|
|
|
|
|
|
|
|
#include "elf64-target.h"
|