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b34976b65a
comparisons of bfd_boolean vars with TRUE/FALSE. Formatting.
2201 lines
64 KiB
C
2201 lines
64 KiB
C
/* VAX series support for 32-bit ELF
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Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
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Free Software Foundation, Inc.
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Contributed by Matt Thomas <matt@3am-software.com>.
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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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#include "bfdlink.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/vax.h"
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static reloc_howto_type *reloc_type_lookup
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PARAMS ((bfd *, bfd_reloc_code_real_type));
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static void rtype_to_howto
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PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
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static struct bfd_hash_entry *elf_vax_link_hash_newfunc
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PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
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static struct bfd_link_hash_table *elf_vax_link_hash_table_create
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PARAMS ((bfd *));
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static bfd_boolean elf_vax_check_relocs
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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static asection *elf_vax_gc_mark_hook
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PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
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struct elf_link_hash_entry *, Elf_Internal_Sym *));
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static bfd_boolean elf_vax_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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static bfd_boolean elf_vax_adjust_dynamic_symbol
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PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
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static bfd_boolean elf_vax_size_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static bfd_boolean elf_vax_relocate_section
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
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static bfd_boolean elf_vax_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 *));
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static bfd_boolean elf_vax_finish_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static bfd_boolean elf32_vax_set_private_flags
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PARAMS ((bfd *, flagword));
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static bfd_boolean elf32_vax_merge_private_bfd_data
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PARAMS ((bfd *, bfd *));
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static bfd_boolean elf32_vax_print_private_bfd_data
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PARAMS ((bfd *, PTR));
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static reloc_howto_type howto_table[] = {
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HOWTO (R_VAX_NONE, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_VAX_NONE", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0x00000000, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_VAX_32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_VAX_32", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_VAX_16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_VAX_16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0x0000ffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_VAX_8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_VAX_8", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0x000000ff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_VAX_PC32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_VAX_PC32", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_VAX_PC16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_VAX_PC16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0x0000ffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_VAX_PC8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_VAX_PC8", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0x000000ff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_VAX_GOT32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_VAX_GOT32", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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EMPTY_HOWTO (-1),
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EMPTY_HOWTO (-1),
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EMPTY_HOWTO (-1),
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EMPTY_HOWTO (-1),
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EMPTY_HOWTO (-1),
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HOWTO (R_VAX_PLT32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_VAX_PLT32", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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EMPTY_HOWTO (-1),
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EMPTY_HOWTO (-1),
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EMPTY_HOWTO (-1),
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EMPTY_HOWTO (-1),
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EMPTY_HOWTO (-1),
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HOWTO (R_VAX_COPY, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_VAX_COPY", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_VAX_GLOB_DAT, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_VAX_GLOB_DAT", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_VAX_JMP_SLOT, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_VAX_JMP_SLOT", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_VAX_RELATIVE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_VAX_RELATIVE", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* GNU extension to record C++ vtable hierarchy */
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HOWTO (R_VAX_GNU_VTINHERIT, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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NULL, /* special_function */
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"R_VAX_GNU_VTINHERIT", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* GNU extension to record C++ vtable member usage */
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HOWTO (R_VAX_GNU_VTENTRY, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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_bfd_elf_rel_vtable_reloc_fn, /* special_function */
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"R_VAX_GNU_VTENTRY", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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};
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static void
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rtype_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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Elf_Internal_Rela *dst;
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{
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BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
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cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
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}
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#define elf_info_to_howto rtype_to_howto
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static const struct
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{
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bfd_reloc_code_real_type bfd_val;
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int elf_val;
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} reloc_map[] = {
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{ BFD_RELOC_NONE, R_VAX_NONE },
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{ BFD_RELOC_32, R_VAX_32 },
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{ BFD_RELOC_16, R_VAX_16 },
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{ BFD_RELOC_8, R_VAX_8 },
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{ BFD_RELOC_32_PCREL, R_VAX_PC32 },
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{ BFD_RELOC_16_PCREL, R_VAX_PC16 },
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{ BFD_RELOC_8_PCREL, R_VAX_PC8 },
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{ BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
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{ BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
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{ BFD_RELOC_NONE, R_VAX_COPY },
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{ BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
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{ BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
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{ BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
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{ BFD_RELOC_CTOR, R_VAX_32 },
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{ BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
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{ BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
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};
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static reloc_howto_type *
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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 (reloc_map) / sizeof (reloc_map[0]); i++)
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{
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if (reloc_map[i].bfd_val == code)
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return &howto_table[reloc_map[i].elf_val];
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}
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return 0;
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}
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#define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
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#define ELF_ARCH bfd_arch_vax
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/* end code generated by elf.el */
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/* Functions for the VAX ELF linker. */
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/* The name of the dynamic interpreter. This is put in the .interp
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section. */
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#define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
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/* The size in bytes of an entry in the procedure linkage table. */
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#define PLT_ENTRY_SIZE 12
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/* The first entry in a procedure linkage table looks like this. See
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the SVR4 ABI VAX supplement to see how this works. */
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static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
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{
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0xdd, 0xef, /* pushl l^ */
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0, 0, 0, 0, /* offset to .plt.got + 4 */
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0x17, 0xff, /* jmp @L^(pc) */
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0, 0, 0, 0, /* offset to .plt.got + 8 */
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};
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/* Subsequent entries in a procedure linkage table look like this. */
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static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
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{
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0x40, 0x00, /* .word ^M<r6> */
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0x16, 0xef, /* jsb L^(pc) */
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0, 0, 0, 0, /* replaced with offset to start of .plt */
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0, 0, 0, 0, /* index into .rela.plt */
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};
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/* The VAX linker needs to keep track of the number of relocs that it
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decides to copy in check_relocs for each symbol. This is so that it
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can discard PC relative relocs if it doesn't need them when linking
|
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with -Bsymbolic. We store the information in a field extending the
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regular ELF linker hash table. */
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/* This structure keeps track of the number of PC relative relocs we have
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copied for a given symbol. */
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struct elf_vax_pcrel_relocs_copied
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{
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/* Next section. */
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struct elf_vax_pcrel_relocs_copied *next;
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/* A section in dynobj. */
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asection *section;
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/* Number of relocs copied in this section. */
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bfd_size_type count;
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};
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/* VAX ELF linker hash entry. */
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struct elf_vax_link_hash_entry
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{
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struct elf_link_hash_entry root;
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/* Number of PC relative relocs copied for this symbol. */
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struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
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bfd_vma got_addend;
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};
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/* VAX ELF linker hash table. */
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struct elf_vax_link_hash_table
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{
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struct elf_link_hash_table root;
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};
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/* Declare this now that the above structures are defined. */
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static bfd_boolean elf_vax_discard_copies
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PARAMS ((struct elf_vax_link_hash_entry *, PTR));
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/* Declare this now that the above structures are defined. */
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static bfd_boolean elf_vax_instantiate_got_entries
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PARAMS ((struct elf_link_hash_entry *, PTR));
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/* Traverse an VAX ELF linker hash table. */
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#define elf_vax_link_hash_traverse(table, func, info) \
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(elf_link_hash_traverse \
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(&(table)->root, \
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(bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
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(info)))
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/* Get the VAX ELF linker hash table from a link_info structure. */
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#define elf_vax_hash_table(p) \
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((struct elf_vax_link_hash_table *) (p)->hash)
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|
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/* Create an entry in an VAX ELF linker hash table. */
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|
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static struct bfd_hash_entry *
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elf_vax_link_hash_newfunc (entry, table, string)
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struct bfd_hash_entry *entry;
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struct bfd_hash_table *table;
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const char *string;
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{
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struct elf_vax_link_hash_entry *ret =
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(struct elf_vax_link_hash_entry *) entry;
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|
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/* Allocate the structure if it has not already been allocated by a
|
||
subclass. */
|
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if (ret == (struct elf_vax_link_hash_entry *) NULL)
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ret = ((struct elf_vax_link_hash_entry *)
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bfd_hash_allocate (table,
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sizeof (struct elf_vax_link_hash_entry)));
|
||
if (ret == (struct elf_vax_link_hash_entry *) NULL)
|
||
return (struct bfd_hash_entry *) ret;
|
||
|
||
/* Call the allocation method of the superclass. */
|
||
ret = ((struct elf_vax_link_hash_entry *)
|
||
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
||
table, string));
|
||
if (ret != (struct elf_vax_link_hash_entry *) NULL)
|
||
{
|
||
ret->pcrel_relocs_copied = NULL;
|
||
}
|
||
|
||
return (struct bfd_hash_entry *) ret;
|
||
}
|
||
|
||
/* Create an VAX ELF linker hash table. */
|
||
|
||
static struct bfd_link_hash_table *
|
||
elf_vax_link_hash_table_create (abfd)
|
||
bfd *abfd;
|
||
{
|
||
struct elf_vax_link_hash_table *ret;
|
||
bfd_size_type amt = sizeof (struct elf_vax_link_hash_table);
|
||
|
||
ret = (struct elf_vax_link_hash_table *) bfd_malloc (amt);
|
||
if (ret == (struct elf_vax_link_hash_table *) NULL)
|
||
return NULL;
|
||
|
||
if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
|
||
elf_vax_link_hash_newfunc))
|
||
{
|
||
free (ret);
|
||
return NULL;
|
||
}
|
||
|
||
return &ret->root.root;
|
||
}
|
||
|
||
/* Keep vax-specific flags in the ELF header */
|
||
static bfd_boolean
|
||
elf32_vax_set_private_flags (abfd, flags)
|
||
bfd *abfd;
|
||
flagword flags;
|
||
{
|
||
elf_elfheader (abfd)->e_flags = flags;
|
||
elf_flags_init (abfd) = TRUE;
|
||
return TRUE;
|
||
}
|
||
|
||
/* Merge backend specific data from an object file to the output
|
||
object file when linking. */
|
||
static bfd_boolean
|
||
elf32_vax_merge_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
flagword out_flags;
|
||
flagword in_flags;
|
||
|
||
if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return TRUE;
|
||
|
||
in_flags = elf_elfheader (ibfd)->e_flags;
|
||
out_flags = elf_elfheader (obfd)->e_flags;
|
||
|
||
if (!elf_flags_init (obfd))
|
||
{
|
||
elf_flags_init (obfd) = TRUE;
|
||
elf_elfheader (obfd)->e_flags = in_flags;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Display the flags field */
|
||
static bfd_boolean
|
||
elf32_vax_print_private_bfd_data (abfd, ptr)
|
||
bfd *abfd;
|
||
PTR ptr;
|
||
{
|
||
FILE *file = (FILE *) ptr;
|
||
|
||
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
||
|
||
/* Print normal ELF private data. */
|
||
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
||
|
||
/* Ignore init flag - it may not be set, despite the flags field containing valid data. */
|
||
|
||
/* xgettext:c-format */
|
||
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
|
||
|
||
if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
|
||
fprintf (file, _(" [nonpic]"));
|
||
|
||
if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
|
||
fprintf (file, _(" [d-float]"));
|
||
|
||
if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
|
||
fprintf (file, _(" [g-float]"));
|
||
|
||
fputc ('\n', file);
|
||
|
||
return TRUE;
|
||
}
|
||
/* Look through the relocs for a section during the first phase, and
|
||
allocate space in the global offset table or procedure linkage
|
||
table. */
|
||
|
||
static bfd_boolean
|
||
elf_vax_check_relocs (abfd, info, sec, relocs)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
asection *sec;
|
||
const Elf_Internal_Rela *relocs;
|
||
{
|
||
bfd *dynobj;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
const Elf_Internal_Rela *rel;
|
||
const Elf_Internal_Rela *rel_end;
|
||
asection *sgot;
|
||
asection *srelgot;
|
||
asection *sreloc;
|
||
|
||
if (info->relocateable)
|
||
return TRUE;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
|
||
sgot = NULL;
|
||
srelgot = NULL;
|
||
sreloc = NULL;
|
||
|
||
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 = ELF32_R_SYM (rel->r_info);
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
h = NULL;
|
||
else
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_VAX_GOT32:
|
||
if (h != NULL
|
||
&& strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
|
||
break;
|
||
|
||
/* This symbol requires a global offset table entry. */
|
||
|
||
if (dynobj == NULL)
|
||
{
|
||
/* Create the .got section. */
|
||
elf_hash_table (info)->dynobj = dynobj = abfd;
|
||
if (!_bfd_elf_create_got_section (dynobj, info))
|
||
return FALSE;
|
||
}
|
||
|
||
if (sgot == NULL)
|
||
{
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
}
|
||
|
||
if (srelgot == NULL
|
||
&& (h != NULL || info->shared))
|
||
{
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
if (srelgot == NULL)
|
||
{
|
||
srelgot = bfd_make_section (dynobj, ".rela.got");
|
||
if (srelgot == NULL
|
||
|| !bfd_set_section_flags (dynobj, srelgot,
|
||
(SEC_ALLOC
|
||
| SEC_LOAD
|
||
| SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED
|
||
| SEC_READONLY))
|
||
|| !bfd_set_section_alignment (dynobj, srelgot, 2))
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
if (h != NULL)
|
||
{
|
||
struct elf_vax_link_hash_entry *eh;
|
||
|
||
eh = (struct elf_vax_link_hash_entry *) h;
|
||
if (h->got.refcount == -1)
|
||
{
|
||
h->got.refcount = 1;
|
||
eh->got_addend = rel->r_addend;
|
||
}
|
||
else
|
||
{
|
||
h->got.refcount++;
|
||
if (eh->got_addend != (bfd_vma) rel->r_addend)
|
||
(*_bfd_error_handler)
|
||
(_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"),
|
||
bfd_get_filename (abfd), rel->r_addend,
|
||
h->root.root.string,
|
||
eh->got_addend);
|
||
|
||
}
|
||
}
|
||
break;
|
||
|
||
case R_VAX_PLT32:
|
||
/* This symbol requires a procedure linkage table entry. We
|
||
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. */
|
||
|
||
/* If this is a local symbol, we resolve it directly without
|
||
creating a procedure linkage table entry. */
|
||
if (h == NULL)
|
||
continue;
|
||
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
||
if (h->plt.refcount == -1)
|
||
h->plt.refcount = 1;
|
||
else
|
||
h->plt.refcount++;
|
||
break;
|
||
|
||
case R_VAX_PC8:
|
||
case R_VAX_PC16:
|
||
case R_VAX_PC32:
|
||
/* If we are creating a shared library and this is not a local
|
||
symbol, we need to copy the reloc into the shared library.
|
||
However when linking with -Bsymbolic and this is a global
|
||
symbol which is defined in an object we are including in the
|
||
link (i.e., DEF_REGULAR is set), then we can resolve the
|
||
reloc directly. At 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 later (it is never cleared). We account for that
|
||
possibility below by storing information in the
|
||
pcrel_relocs_copied field of the hash table entry. */
|
||
if (!(info->shared
|
||
&& (sec->flags & SEC_ALLOC) != 0
|
||
&& h != NULL
|
||
&& (!info->symbolic
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0)))
|
||
{
|
||
if (h != NULL)
|
||
{
|
||
/* Make sure a plt entry is created for this symbol if
|
||
it turns out to be a function defined by a dynamic
|
||
object. */
|
||
if (h->plt.refcount == -1)
|
||
h->plt.refcount = 1;
|
||
else
|
||
h->plt.refcount++;
|
||
}
|
||
break;
|
||
}
|
||
/* Fall through. */
|
||
case R_VAX_8:
|
||
case R_VAX_16:
|
||
case R_VAX_32:
|
||
if (h != NULL)
|
||
{
|
||
/* Make sure a plt entry is created for this symbol if it
|
||
turns out to be a function defined by a dynamic object. */
|
||
if (h->plt.refcount == -1)
|
||
h->plt.refcount = 1;
|
||
else
|
||
h->plt.refcount++;
|
||
}
|
||
|
||
/* If we are creating a shared library, we need to copy the
|
||
reloc into the shared library. */
|
||
if (info->shared
|
||
&& (sec->flags & SEC_ALLOC) != 0)
|
||
{
|
||
/* When creating a shared object, we must copy these
|
||
reloc types into the output file. We create a reloc
|
||
section in dynobj and make room for this reloc. */
|
||
if (sreloc == NULL)
|
||
{
|
||
const char *name;
|
||
|
||
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;
|
||
|
||
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
|
||
&& strcmp (bfd_get_section_name (abfd, sec),
|
||
name + 5) == 0);
|
||
|
||
sreloc = bfd_get_section_by_name (dynobj, name);
|
||
if (sreloc == NULL)
|
||
{
|
||
sreloc = bfd_make_section (dynobj, name);
|
||
if (sreloc == NULL
|
||
|| !bfd_set_section_flags (dynobj, sreloc,
|
||
(SEC_ALLOC
|
||
| SEC_LOAD
|
||
| SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED
|
||
| SEC_READONLY))
|
||
|| !bfd_set_section_alignment (dynobj, sreloc, 2))
|
||
return FALSE;
|
||
}
|
||
if (sec->flags & SEC_READONLY)
|
||
info->flags |= DF_TEXTREL;
|
||
}
|
||
|
||
sreloc->_raw_size += sizeof (Elf32_External_Rela);
|
||
|
||
/* If we are linking with -Bsymbolic, we count the number of
|
||
PC relative relocations we have entered for this symbol,
|
||
so that we can discard them again if the symbol is later
|
||
defined by a regular object. Note that this function is
|
||
only called if we are using an vaxelf linker hash table,
|
||
which means that h is really a pointer to an
|
||
elf_vax_link_hash_entry. */
|
||
if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
|
||
|| ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
|
||
|| ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
|
||
&& info->symbolic)
|
||
{
|
||
struct elf_vax_link_hash_entry *eh;
|
||
struct elf_vax_pcrel_relocs_copied *p;
|
||
|
||
eh = (struct elf_vax_link_hash_entry *) h;
|
||
|
||
for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
|
||
if (p->section == sreloc)
|
||
break;
|
||
|
||
if (p == NULL)
|
||
{
|
||
p = ((struct elf_vax_pcrel_relocs_copied *)
|
||
bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
|
||
if (p == NULL)
|
||
return FALSE;
|
||
p->next = eh->pcrel_relocs_copied;
|
||
eh->pcrel_relocs_copied = p;
|
||
p->section = sreloc;
|
||
p->count = 0;
|
||
}
|
||
|
||
++p->count;
|
||
}
|
||
}
|
||
|
||
break;
|
||
|
||
/* This relocation describes the C++ object vtable hierarchy.
|
||
Reconstruct it for later use during GC. */
|
||
case R_VAX_GNU_VTINHERIT:
|
||
if (!_bfd_elf32_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_VAX_GNU_VTENTRY:
|
||
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return FALSE;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Return the section that should be marked against GC for a given
|
||
relocation. */
|
||
|
||
static asection *
|
||
elf_vax_gc_mark_hook (sec, info, rel, h, sym)
|
||
asection *sec;
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
||
Elf_Internal_Rela *rel;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
{
|
||
if (h != NULL)
|
||
{
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_VAX_GNU_VTINHERIT:
|
||
case R_VAX_GNU_VTENTRY:
|
||
break;
|
||
|
||
default:
|
||
switch (h->root.type)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
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;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Update the got entry reference counts for the section being removed. */
|
||
|
||
static bfd_boolean
|
||
elf_vax_gc_sweep_hook (abfd, info, sec, relocs)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
asection *sec;
|
||
const Elf_Internal_Rela *relocs;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
const Elf_Internal_Rela *rel, *relend;
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
bfd *dynobj;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
if (dynobj == NULL)
|
||
return TRUE;
|
||
|
||
relend = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < relend; rel++)
|
||
{
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_VAX_GOT32:
|
||
r_symndx = ELF32_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)
|
||
--h->got.refcount;
|
||
}
|
||
break;
|
||
|
||
case R_VAX_PLT32:
|
||
case R_VAX_PC8:
|
||
case R_VAX_PC16:
|
||
case R_VAX_PC32:
|
||
case R_VAX_8:
|
||
case R_VAX_16:
|
||
case R_VAX_32:
|
||
r_symndx = ELF32_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;
|
||
}
|
||
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
|
||
understand. */
|
||
|
||
static bfd_boolean
|
||
elf_vax_adjust_dynamic_symbol (info, h)
|
||
struct bfd_link_info *info;
|
||
struct elf_link_hash_entry *h;
|
||
{
|
||
bfd *dynobj;
|
||
asection *s;
|
||
unsigned int power_of_two;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
/* Make sure we know what is going on here. */
|
||
BFD_ASSERT (dynobj != NULL
|
||
&& ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
|
||
|| h->weakdef != NULL
|
||
|| ((h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_REF_REGULAR) != 0
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0)));
|
||
|
||
/* 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)
|
||
{
|
||
if (! info->shared
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
|
||
/* We must always create the plt entry if it was referenced
|
||
by a PLTxxO relocation. In this case we already recorded
|
||
it as a dynamic symbol. */
|
||
&& h->dynindx == -1)
|
||
{
|
||
/* This case can occur if we saw a PLTxx reloc in an input
|
||
file, but the symbol was never referred to by a dynamic
|
||
object. In such a case, we don't actually need to build
|
||
a procedure linkage table, and we can just do a PCxx
|
||
reloc instead. */
|
||
BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
|
||
h->plt.offset = (bfd_vma) -1;
|
||
return TRUE;
|
||
}
|
||
|
||
/* GC may have rendered this entry unused. */
|
||
if (h->plt.refcount <= 0)
|
||
{
|
||
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
||
h->plt.offset = (bfd_vma) -1;
|
||
return TRUE;
|
||
}
|
||
|
||
/* Make sure this symbol is output as a dynamic symbol. */
|
||
if (h->dynindx == -1)
|
||
{
|
||
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
/* 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;
|
||
}
|
||
|
||
/* 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 = s->_raw_size;
|
||
}
|
||
|
||
h->plt.offset = s->_raw_size;
|
||
|
||
/* 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. */
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
BFD_ASSERT (s != NULL);
|
||
s->_raw_size += 4;
|
||
|
||
/* We also need to make an entry in the .rela.plt section. */
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".rela.plt");
|
||
BFD_ASSERT (s != NULL);
|
||
s->_raw_size += sizeof (Elf32_External_Rela);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Reinitialize the plt offset now that it is not used as a reference
|
||
count any more. */
|
||
h->plt.offset = (bfd_vma) -1;
|
||
|
||
/* If this is a weak symbol, and there is a real definition, the
|
||
processor independent code will have arranged for us to see the
|
||
real definition first, and we can just use the same value. */
|
||
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
|
||
is not a function. */
|
||
|
||
/* 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
|
||
be handled correctly by relocate_section. */
|
||
if (info->shared)
|
||
return TRUE;
|
||
|
||
/* We must allocate the symbol in our .dynbss section, which will
|
||
become part of the .bss section of the executable. There will be
|
||
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. */
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".dynbss");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
/* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
|
||
copy the initial value out of the dynamic object and into the
|
||
runtime process image. We need to remember the offset into the
|
||
.rela.bss section we are going to use. */
|
||
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
||
{
|
||
asection *srel;
|
||
|
||
srel = bfd_get_section_by_name (dynobj, ".rela.bss");
|
||
BFD_ASSERT (srel != NULL);
|
||
srel->_raw_size += sizeof (Elf32_External_Rela);
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
|
||
}
|
||
|
||
/* We need to figure out the alignment required for this symbol. I
|
||
have no idea how ELF linkers handle this. */
|
||
power_of_two = bfd_log2 (h->size);
|
||
if (power_of_two > 3)
|
||
power_of_two = 3;
|
||
|
||
/* Apply the required alignment. */
|
||
s->_raw_size = BFD_ALIGN (s->_raw_size,
|
||
(bfd_size_type) (1 << power_of_two));
|
||
if (power_of_two > bfd_get_section_alignment (dynobj, s))
|
||
{
|
||
if (!bfd_set_section_alignment (dynobj, s, power_of_two))
|
||
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;
|
||
}
|
||
|
||
/* Set the sizes of the dynamic sections. */
|
||
|
||
static bfd_boolean
|
||
elf_vax_size_dynamic_sections (output_bfd, info)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *dynobj;
|
||
asection *s;
|
||
bfd_boolean plt;
|
||
bfd_boolean relocs;
|
||
bfd_boolean reltext;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
BFD_ASSERT (dynobj != NULL);
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Set the contents of the .interp section to the interpreter. */
|
||
if (!info->shared)
|
||
{
|
||
s = bfd_get_section_by_name (dynobj, ".interp");
|
||
BFD_ASSERT (s != NULL);
|
||
s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
|
||
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* We may have created entries in the .rela.got and .got sections.
|
||
However, if we are not creating the dynamic sections, we will
|
||
not actually use these entries. Reset the size of .rela.got
|
||
and .got, which will cause it to get stripped from the output
|
||
file below. */
|
||
s = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
if (s != NULL)
|
||
s->_raw_size = 0;
|
||
s = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
if (s != NULL)
|
||
s->_raw_size = 0;
|
||
s = bfd_get_section_by_name (dynobj, ".got");
|
||
if (s != NULL)
|
||
s->_raw_size = 0;
|
||
}
|
||
|
||
/* If this is a -Bsymbolic shared link, then we need to discard all PC
|
||
relative relocs against symbols defined in a regular object. We
|
||
allocated space for them in the check_relocs routine, but we will not
|
||
fill them in in the relocate_section routine. */
|
||
if (info->shared && info->symbolic)
|
||
elf_vax_link_hash_traverse (elf_vax_hash_table (info),
|
||
elf_vax_discard_copies,
|
||
(PTR) NULL);
|
||
|
||
/* If this is a -Bsymbolic shared link or a static link, we need to
|
||
discard all the got entries we've recorded. Otherwise, we need to
|
||
instantiate (allocate space for them). */
|
||
elf_link_hash_traverse (elf_hash_table (info),
|
||
elf_vax_instantiate_got_entries,
|
||
(PTR) info);
|
||
|
||
/* The check_relocs and adjust_dynamic_symbol entry points have
|
||
determined the sizes of the various dynamic sections. Allocate
|
||
memory for them. */
|
||
plt = FALSE;
|
||
relocs = FALSE;
|
||
reltext = FALSE;
|
||
for (s = dynobj->sections; s != NULL; s = s->next)
|
||
{
|
||
const char *name;
|
||
bfd_boolean strip;
|
||
|
||
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
||
continue;
|
||
|
||
/* It's OK to base decisions on the section name, because none
|
||
of the dynobj section names depend upon the input files. */
|
||
name = bfd_get_section_name (dynobj, s);
|
||
|
||
strip = FALSE;
|
||
|
||
if (strcmp (name, ".plt") == 0)
|
||
{
|
||
if (s->_raw_size == 0)
|
||
{
|
||
/* Strip this section if we don't need it; see the
|
||
comment below. */
|
||
strip = TRUE;
|
||
}
|
||
else
|
||
{
|
||
/* Remember whether there is a PLT. */
|
||
plt = TRUE;
|
||
}
|
||
}
|
||
else if (strncmp (name, ".rela", 5) == 0)
|
||
{
|
||
if (s->_raw_size == 0)
|
||
{
|
||
/* 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. */
|
||
strip = TRUE;
|
||
}
|
||
else
|
||
{
|
||
asection *target;
|
||
|
||
/* Remember whether there are any reloc sections other
|
||
than .rela.plt. */
|
||
if (strcmp (name, ".rela.plt") != 0)
|
||
{
|
||
const char *outname;
|
||
|
||
relocs = TRUE;
|
||
|
||
/* If this relocation section applies to a read only
|
||
section, then we probably need a DT_TEXTREL
|
||
entry. .rela.plt is actually associated with
|
||
.got.plt, which is never readonly. */
|
||
outname = bfd_get_section_name (output_bfd,
|
||
s->output_section);
|
||
target = bfd_get_section_by_name (output_bfd, outname + 5);
|
||
if (target != NULL
|
||
&& (target->flags & SEC_READONLY) != 0
|
||
&& (target->flags & SEC_ALLOC) != 0)
|
||
reltext = TRUE;
|
||
}
|
||
|
||
/* We use the reloc_count field as a counter if we need
|
||
to copy relocs into the output file. */
|
||
s->reloc_count = 0;
|
||
}
|
||
}
|
||
else if (strncmp (name, ".got", 4) != 0)
|
||
{
|
||
/* It's not one of our sections, so don't allocate space. */
|
||
continue;
|
||
}
|
||
|
||
if (strip)
|
||
{
|
||
_bfd_strip_section_from_output (info, s);
|
||
continue;
|
||
}
|
||
|
||
/* Allocate memory for the section contents. */
|
||
s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
|
||
if (s->contents == NULL && s->_raw_size != 0)
|
||
return FALSE;
|
||
}
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Add some entries to the .dynamic section. We fill in the
|
||
values later, in elf_vax_finish_dynamic_sections, but we
|
||
must add the entries now so that we get the correct size for
|
||
the .dynamic section. The DT_DEBUG entry is filled in by the
|
||
dynamic linker and used by the debugger. */
|
||
#define add_dynamic_entry(TAG, VAL) \
|
||
bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
|
||
|
||
if (!info->shared)
|
||
{
|
||
if (!add_dynamic_entry (DT_DEBUG, 0))
|
||
return FALSE;
|
||
}
|
||
|
||
if (plt)
|
||
{
|
||
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))
|
||
return FALSE;
|
||
}
|
||
|
||
if (relocs)
|
||
{
|
||
if (!add_dynamic_entry (DT_RELA, 0)
|
||
|| !add_dynamic_entry (DT_RELASZ, 0)
|
||
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
|
||
return FALSE;
|
||
}
|
||
|
||
if (reltext || (info->flags & DF_TEXTREL) != 0)
|
||
{
|
||
if (!add_dynamic_entry (DT_TEXTREL, 0))
|
||
return FALSE;
|
||
}
|
||
}
|
||
#undef add_dynamic_entry
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* This function is called via elf_vax_link_hash_traverse if we are
|
||
creating a shared object with -Bsymbolic. It discards the space
|
||
allocated to copy PC relative relocs against symbols which are defined
|
||
in regular objects. We allocated space for them in the check_relocs
|
||
routine, but we won't fill them in in the relocate_section routine. */
|
||
|
||
/*ARGSUSED*/
|
||
static bfd_boolean
|
||
elf_vax_discard_copies (h, ignore)
|
||
struct elf_vax_link_hash_entry *h;
|
||
PTR ignore ATTRIBUTE_UNUSED;
|
||
{
|
||
struct elf_vax_pcrel_relocs_copied *s;
|
||
|
||
if (h->root.root.type == bfd_link_hash_warning)
|
||
h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
|
||
|
||
/* We only discard relocs for symbols defined in a regular object. */
|
||
if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
return TRUE;
|
||
|
||
for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
|
||
s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* This function is called via elf_link_hash_traverse. It looks for entries
|
||
that have GOT or PLT (.GOT) references. If creating a static object or a
|
||
shared object with -Bsymbolic, it resets the reference count back to 0
|
||
and sets the offset to -1 so normal PC32 relocation will be done. If
|
||
creating a shared object or executable, space in the .got and .rela.got
|
||
will be reserved for the symbol. */
|
||
|
||
/*ARGSUSED*/
|
||
static bfd_boolean
|
||
elf_vax_instantiate_got_entries (h, infoptr)
|
||
struct elf_link_hash_entry *h;
|
||
PTR infoptr;
|
||
{
|
||
struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
|
||
bfd *dynobj;
|
||
asection *sgot;
|
||
asection *srelgot;
|
||
|
||
/* We don't care about non-GOT (and non-PLT) entries. */
|
||
if (h->got.refcount <= 0 && h->plt.refcount <= 0)
|
||
return TRUE;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
if (dynobj == NULL)
|
||
return TRUE;
|
||
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
|
||
if (!elf_hash_table (info)->dynamic_sections_created
|
||
|| (info->shared && info->symbolic))
|
||
{
|
||
h->got.refcount = 0;
|
||
h->got.offset = (bfd_vma) -1;
|
||
h->plt.refcount = 0;
|
||
h->plt.offset = (bfd_vma) -1;
|
||
}
|
||
else if (h->got.refcount > 0)
|
||
{
|
||
/* Make sure this symbol is output as a dynamic symbol. */
|
||
if (h->dynindx == -1)
|
||
{
|
||
if (!bfd_elf32_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
|
||
/* Allocate space in the .got and .rela.got sections. */
|
||
sgot->_raw_size += 4;
|
||
srelgot->_raw_size += sizeof (Elf32_External_Rela);
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Relocate an VAX ELF section. */
|
||
|
||
static bfd_boolean
|
||
elf_vax_relocate_section (output_bfd, info, input_bfd, input_section,
|
||
contents, relocs, local_syms, local_sections)
|
||
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;
|
||
{
|
||
bfd *dynobj;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bfd_vma *local_got_offsets;
|
||
bfd_vma plt_index;
|
||
bfd_vma got_offset;
|
||
asection *sgot;
|
||
asection *splt;
|
||
asection *sgotplt;
|
||
asection *sreloc;
|
||
Elf_Internal_Rela *rel;
|
||
Elf_Internal_Rela *relend;
|
||
|
||
if (info->relocateable)
|
||
return TRUE;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
local_got_offsets = elf_local_got_offsets (input_bfd);
|
||
|
||
sgot = NULL;
|
||
splt = NULL;
|
||
sgotplt = NULL;
|
||
sreloc = NULL;
|
||
|
||
rel = relocs;
|
||
relend = relocs + input_section->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
int r_type;
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
bfd_vma relocation;
|
||
bfd_reloc_status_type r;
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
if (r_type < 0 || r_type >= (int) R_VAX_max)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
howto = howto_table + r_type;
|
||
|
||
/* This is a final link. */
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
h = NULL;
|
||
sym = NULL;
|
||
sec = NULL;
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
|
||
}
|
||
else
|
||
{
|
||
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;
|
||
if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
sec = h->root.u.def.section;
|
||
if ((r_type == R_VAX_PLT32
|
||
&& h->plt.offset != (bfd_vma) -1
|
||
&& elf_hash_table (info)->dynamic_sections_created)
|
||
|| (r_type == R_VAX_GOT32
|
||
&& strcmp (h->root.root.string,
|
||
"_GLOBAL_OFFSET_TABLE_") != 0
|
||
&& elf_hash_table (info)->dynamic_sections_created
|
||
&& (! info->shared
|
||
|| (! info->symbolic && h->dynindx != -1)
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
||
|| (info->shared
|
||
&& ((! info->symbolic && h->dynindx != -1)
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
&& ((input_section->flags & SEC_ALLOC) != 0
|
||
/* DWARF will emit R_VAX_32 relocations in its
|
||
sections against symbols defined externally
|
||
in shared libraries. We can't do anything
|
||
with them here. */
|
||
|
||
|| ((input_section->flags & SEC_DEBUGGING) != 0
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_DYNAMIC) != 0))
|
||
&& (r_type == R_VAX_8
|
||
|| r_type == R_VAX_16
|
||
|| r_type == R_VAX_32
|
||
|| r_type == R_VAX_PC8
|
||
|| r_type == R_VAX_PC16
|
||
|| r_type == R_VAX_PC32)))
|
||
{
|
||
/* In these cases, we don't need the relocation
|
||
value. We check specially because in some
|
||
obscure cases sec->output_section will be NULL. */
|
||
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;
|
||
else if (info->shared
|
||
&& (!info->symbolic || info->allow_shlib_undefined)
|
||
&& !info->no_undefined
|
||
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
|
||
relocation = 0;
|
||
else
|
||
{
|
||
if (!(info->callbacks->undefined_symbol
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, rel->r_offset,
|
||
(!info->shared || info->no_undefined
|
||
|| ELF_ST_VISIBILITY (h->other)))))
|
||
return FALSE;
|
||
relocation = 0;
|
||
}
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_VAX_GOT32:
|
||
/* Relocation is to the address of the entry for this symbol
|
||
in the global offset table. */
|
||
if (h == NULL || h->got.offset == (bfd_vma) -1)
|
||
break;
|
||
|
||
/* Relocation is the offset of the entry for this symbol in
|
||
the global offset table. */
|
||
|
||
{
|
||
bfd_vma off;
|
||
|
||
if (sgot == NULL)
|
||
{
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
}
|
||
|
||
BFD_ASSERT (h != NULL);
|
||
off = h->got.offset;
|
||
BFD_ASSERT (off != (bfd_vma) -1);
|
||
BFD_ASSERT (off < sgot->_raw_size);
|
||
|
||
if (info->shared
|
||
&& h->dynindx == -1
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
|
||
{
|
||
/* The symbol was forced to be local
|
||
because of a version file.. We must initialize
|
||
this entry in the global offset table. Since
|
||
the offset must always be a multiple of 4, we
|
||
use the least significant bit to record whether
|
||
we have initialized it already.
|
||
|
||
When doing a dynamic link, we create a .rela.got
|
||
relocation entry to initialize the value. This
|
||
is done in the finish_dynamic_symbol routine. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, relocation + rel->r_addend,
|
||
sgot->contents + off);
|
||
h->got.offset |= 1;
|
||
}
|
||
} else {
|
||
bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
|
||
}
|
||
|
||
relocation = sgot->output_offset + off;
|
||
/* The GOT relocation uses the addend. */
|
||
rel->r_addend = 0;
|
||
|
||
/* Change the reference to be indirect. */
|
||
contents[rel->r_offset - 1] |= 0x10;
|
||
relocation += sgot->output_section->vma;
|
||
}
|
||
break;
|
||
|
||
case R_VAX_PLT32:
|
||
/* Relocation is to the entry for this symbol in the
|
||
procedure linkage table. */
|
||
|
||
/* Resolve a PLTxx reloc against a local symbol directly,
|
||
without using the procedure linkage table. */
|
||
if (h == NULL)
|
||
break;
|
||
|
||
if (h->plt.offset == (bfd_vma) -1
|
||
|| !elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* We didn't make a PLT entry for this symbol. This
|
||
happens when statically linking PIC code, or when
|
||
using -Bsymbolic. */
|
||
break;
|
||
}
|
||
|
||
if (splt == NULL)
|
||
{
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (splt != NULL);
|
||
}
|
||
|
||
if (sgotplt == NULL)
|
||
{
|
||
sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
BFD_ASSERT (splt != NULL);
|
||
}
|
||
|
||
plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
|
||
|
||
/* Get the offset into the .got table of the entry that
|
||
corresponds to this function. Each .got entry is 4 bytes.
|
||
The first two are reserved. */
|
||
got_offset = (plt_index + 3) * 4;
|
||
|
||
/* We want the relocate to point into the .got.plt instead
|
||
of the plt itself. */
|
||
relocation = (sgotplt->output_section->vma
|
||
+ sgotplt->output_offset
|
||
+ got_offset);
|
||
contents[rel->r_offset-1] |= 0x10; /* make indirect */
|
||
if (rel->r_addend == 2)
|
||
{
|
||
h->plt.offset |= 1;
|
||
}
|
||
else if (rel->r_addend != 0)
|
||
(*_bfd_error_handler)
|
||
(_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
|
||
bfd_get_filename (input_bfd), rel->r_addend,
|
||
h->root.root.string,
|
||
bfd_get_section_name (input_bfd, input_section));
|
||
rel->r_addend = 0;
|
||
|
||
break;
|
||
|
||
case R_VAX_PC8:
|
||
case R_VAX_PC16:
|
||
case R_VAX_PC32:
|
||
if (h == NULL)
|
||
break;
|
||
/* Fall through. */
|
||
case R_VAX_8:
|
||
case R_VAX_16:
|
||
case R_VAX_32:
|
||
if (info->shared
|
||
&& r_symndx != 0
|
||
&& (input_section->flags & SEC_ALLOC) != 0
|
||
&& ((r_type != R_VAX_PC8
|
||
&& r_type != R_VAX_PC16
|
||
&& r_type != R_VAX_PC32)
|
||
|| (!info->symbolic
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0)))
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
bfd_boolean skip, relocate;
|
||
|
||
/* When generating a shared object, these relocations
|
||
are copied into the output file to be resolved at run
|
||
time. */
|
||
|
||
if (sreloc == NULL)
|
||
{
|
||
const char *name;
|
||
|
||
name = (bfd_elf_string_from_elf_section
|
||
(input_bfd,
|
||
elf_elfheader (input_bfd)->e_shstrndx,
|
||
elf_section_data (input_section)->rel_hdr.sh_name));
|
||
if (name == NULL)
|
||
return FALSE;
|
||
|
||
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
|
||
&& strcmp (bfd_get_section_name (input_bfd,
|
||
input_section),
|
||
name + 5) == 0);
|
||
|
||
sreloc = bfd_get_section_by_name (dynobj, name);
|
||
BFD_ASSERT (sreloc != NULL);
|
||
}
|
||
|
||
skip = FALSE;
|
||
relocate = FALSE;
|
||
|
||
outrel.r_offset =
|
||
_bfd_elf_section_offset (output_bfd, info, input_section,
|
||
rel->r_offset);
|
||
if (outrel.r_offset == (bfd_vma) -1)
|
||
skip = TRUE;
|
||
if (outrel.r_offset == (bfd_vma) -2)
|
||
skip = TRUE, relocate = TRUE;
|
||
outrel.r_offset += (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
|
||
if (skip)
|
||
memset (&outrel, 0, sizeof outrel);
|
||
/* h->dynindx may be -1 if the symbol was marked to
|
||
become local. */
|
||
else if (h != NULL
|
||
&& ((! info->symbolic && h->dynindx != -1)
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
||
{
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
|
||
outrel.r_addend = relocation + rel->r_addend;
|
||
}
|
||
else
|
||
{
|
||
if (r_type == R_VAX_32)
|
||
{
|
||
relocate = TRUE;
|
||
outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
|
||
BFD_ASSERT (bfd_get_signed_32 (input_bfd,
|
||
&contents[rel->r_offset]) == 0);
|
||
outrel.r_addend = relocation + rel->r_addend;
|
||
}
|
||
else
|
||
{
|
||
long indx;
|
||
|
||
if (h == NULL)
|
||
sec = local_sections[r_symndx];
|
||
else
|
||
{
|
||
BFD_ASSERT (h->root.type == bfd_link_hash_defined
|
||
|| (h->root.type
|
||
== bfd_link_hash_defweak));
|
||
sec = h->root.u.def.section;
|
||
}
|
||
if (sec != NULL && bfd_is_abs_section (sec))
|
||
indx = 0;
|
||
else if (sec == NULL || sec->owner == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
else
|
||
{
|
||
asection *osec;
|
||
|
||
osec = sec->output_section;
|
||
indx = elf_section_data (osec)->dynindx;
|
||
BFD_ASSERT (indx > 0);
|
||
}
|
||
|
||
outrel.r_info = ELF32_R_INFO (indx, r_type);
|
||
outrel.r_addend = relocation + rel->r_addend;
|
||
}
|
||
}
|
||
|
||
if (!strcmp (bfd_get_section_name (input_bfd, input_section),
|
||
".text") != 0 ||
|
||
(info->shared
|
||
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_32
|
||
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
|
||
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
|
||
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
|
||
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
|
||
{
|
||
if (h != NULL)
|
||
(*_bfd_error_handler)
|
||
(_("%s: warning: %s relocation against symbol `%s' from %s section"),
|
||
bfd_get_filename (input_bfd), howto->name,
|
||
h->root.root.string,
|
||
bfd_get_section_name (input_bfd, input_section));
|
||
else
|
||
(*_bfd_error_handler)
|
||
(_("%s: warning: %s relocation to 0x%x from %s section"),
|
||
bfd_get_filename (input_bfd), howto->name,
|
||
outrel.r_addend,
|
||
bfd_get_section_name (input_bfd, input_section));
|
||
}
|
||
loc = sreloc->contents;
|
||
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
||
|
||
/* This reloc will be computed at runtime, so there's no
|
||
need to do anything now, except for R_VAX_32
|
||
relocations that have been turned into
|
||
R_VAX_RELATIVE. */
|
||
if (!relocate)
|
||
continue;
|
||
}
|
||
|
||
break;
|
||
|
||
case R_VAX_GNU_VTINHERIT:
|
||
case R_VAX_GNU_VTENTRY:
|
||
/* These are no-ops in the end. */
|
||
continue;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
/* VAX PCREL relocations are from the end of relocation, not the start.
|
||
So subtract the difference from the relocation amount since we can't
|
||
add it to the offset. */
|
||
if (howto->pc_relative && howto->pcrel_offset)
|
||
relocation -= bfd_get_reloc_size(howto);
|
||
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, rel->r_addend);
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
switch (r)
|
||
{
|
||
default:
|
||
case bfd_reloc_outofrange:
|
||
abort ();
|
||
case bfd_reloc_overflow:
|
||
{
|
||
const char *name;
|
||
|
||
if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
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 (!(info->callbacks->reloc_overflow
|
||
(info, name, howto->name, (bfd_vma) 0,
|
||
input_bfd, input_section, rel->r_offset)))
|
||
return FALSE;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Finish up dynamic symbol handling. We set the contents of various
|
||
dynamic sections here. */
|
||
|
||
static bfd_boolean
|
||
elf_vax_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;
|
||
{
|
||
bfd *dynobj;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
if (h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
asection *splt;
|
||
asection *sgot;
|
||
asection *srela;
|
||
bfd_vma plt_index;
|
||
bfd_vma got_offset;
|
||
bfd_vma addend;
|
||
Elf_Internal_Rela rela;
|
||
bfd_byte *loc;
|
||
|
||
/* This symbol has an entry in the procedure linkage table. Set
|
||
it up. */
|
||
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
srela = bfd_get_section_by_name (dynobj, ".rela.plt");
|
||
BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
|
||
|
||
addend = 2 * (h->plt.offset & 1);
|
||
h->plt.offset &= ~1;
|
||
|
||
/* 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
|
||
corresponds to this function. Each .got entry is 4 bytes.
|
||
The first two are reserved. */
|
||
got_offset = (plt_index + 3) * 4;
|
||
|
||
/* Fill in the entry in the procedure linkage table. */
|
||
memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
|
||
PLT_ENTRY_SIZE);
|
||
|
||
/* The offset is relative to the first extension word. */
|
||
bfd_put_32 (output_bfd,
|
||
-(h->plt.offset + 8),
|
||
splt->contents + h->plt.offset + 4);
|
||
|
||
bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
|
||
splt->contents + h->plt.offset + 8);
|
||
|
||
/* Fill in the entry in the global offset table. */
|
||
bfd_put_32 (output_bfd,
|
||
(splt->output_section->vma
|
||
+ splt->output_offset
|
||
+ h->plt.offset) + addend,
|
||
sgot->contents + got_offset);
|
||
|
||
/* Fill in the entry in the .rela.plt section. */
|
||
rela.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ got_offset);
|
||
rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
|
||
rela.r_addend = addend;
|
||
loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
||
|
||
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
{
|
||
/* Mark the symbol as undefined, rather than as defined in
|
||
the .plt section. Leave the value alone. */
|
||
sym->st_shndx = SHN_UNDEF;
|
||
}
|
||
}
|
||
|
||
if (h->got.offset != (bfd_vma) -1)
|
||
{
|
||
asection *sgot;
|
||
asection *srela;
|
||
Elf_Internal_Rela rela;
|
||
bfd_byte *loc;
|
||
|
||
/* This symbol has an entry in the global offset table. Set it
|
||
up. */
|
||
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
srela = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
BFD_ASSERT (sgot != NULL && srela != NULL);
|
||
|
||
rela.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ (h->got.offset &~ 1));
|
||
|
||
/* If the symbol was forced to be local because of a version file
|
||
locally 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. */
|
||
if (info->shared
|
||
&& h->dynindx == -1
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
|
||
{
|
||
rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
|
||
}
|
||
else
|
||
{
|
||
rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
|
||
}
|
||
rela.r_addend = bfd_get_signed_32 (output_bfd,
|
||
(sgot->contents
|
||
+ (h->got.offset & ~1)));
|
||
|
||
loc = srela->contents;
|
||
loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
|
||
{
|
||
asection *s;
|
||
Elf_Internal_Rela rela;
|
||
bfd_byte *loc;
|
||
|
||
/* This symbol needs a copy reloc. Set it up. */
|
||
|
||
BFD_ASSERT (h->dynindx != -1
|
||
&& (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak));
|
||
|
||
s = bfd_get_section_by_name (h->root.u.def.section->owner,
|
||
".rela.bss");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
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 = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
|
||
rela.r_addend = 0;
|
||
loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
/* 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;
|
||
}
|
||
|
||
/* Finish up the dynamic sections. */
|
||
|
||
static bfd_boolean
|
||
elf_vax_finish_dynamic_sections (output_bfd, info)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *dynobj;
|
||
asection *sgot;
|
||
asection *sdyn;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
BFD_ASSERT (sgot != NULL);
|
||
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
asection *splt;
|
||
Elf32_External_Dyn *dyncon, *dynconend;
|
||
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (splt != NULL && sdyn != NULL);
|
||
|
||
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
||
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
|
||
for (; dyncon < dynconend; dyncon++)
|
||
{
|
||
Elf_Internal_Dyn dyn;
|
||
const char *name;
|
||
asection *s;
|
||
|
||
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
||
|
||
switch (dyn.d_tag)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case DT_PLTGOT:
|
||
name = ".got";
|
||
goto get_vma;
|
||
case DT_JMPREL:
|
||
name = ".rela.plt";
|
||
get_vma:
|
||
s = bfd_get_section_by_name (output_bfd, name);
|
||
BFD_ASSERT (s != NULL);
|
||
dyn.d_un.d_ptr = s->vma;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_PLTRELSZ:
|
||
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
|
||
BFD_ASSERT (s != NULL);
|
||
if (s->_cooked_size != 0)
|
||
dyn.d_un.d_val = s->_cooked_size;
|
||
else
|
||
dyn.d_un.d_val = s->_raw_size;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_RELASZ:
|
||
/* 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. */
|
||
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
|
||
if (s != NULL)
|
||
{
|
||
if (s->_cooked_size != 0)
|
||
dyn.d_un.d_val -= s->_cooked_size;
|
||
else
|
||
dyn.d_un.d_val -= s->_raw_size;
|
||
}
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Fill in the first entry in the procedure linkage table. */
|
||
if (splt->_raw_size > 0)
|
||
{
|
||
memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
|
||
bfd_put_32 (output_bfd,
|
||
(sgot->output_section->vma
|
||
+ sgot->output_offset + 4
|
||
- (splt->output_section->vma + 6)),
|
||
splt->contents + 2);
|
||
bfd_put_32 (output_bfd,
|
||
(sgot->output_section->vma
|
||
+ sgot->output_offset + 8
|
||
- (splt->output_section->vma + 12)),
|
||
splt->contents + 8);
|
||
elf_section_data (splt->output_section)->this_hdr.sh_entsize
|
||
= PLT_ENTRY_SIZE;
|
||
}
|
||
}
|
||
|
||
/* Fill in the first three entries in the global offset table. */
|
||
if (sgot->_raw_size > 0)
|
||
{
|
||
if (sdyn == NULL)
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
|
||
else
|
||
bfd_put_32 (output_bfd,
|
||
sdyn->output_section->vma + sdyn->output_offset,
|
||
sgot->contents);
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
|
||
}
|
||
|
||
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
#define TARGET_LITTLE_SYM bfd_elf32_vax_vec
|
||
#define TARGET_LITTLE_NAME "elf32-vax"
|
||
#define ELF_MACHINE_CODE EM_VAX
|
||
#define ELF_MAXPAGESIZE 0x1000
|
||
|
||
#define elf_backend_create_dynamic_sections \
|
||
_bfd_elf_create_dynamic_sections
|
||
#define bfd_elf32_bfd_link_hash_table_create \
|
||
elf_vax_link_hash_table_create
|
||
#define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
|
||
|
||
#define elf_backend_check_relocs elf_vax_check_relocs
|
||
#define elf_backend_adjust_dynamic_symbol \
|
||
elf_vax_adjust_dynamic_symbol
|
||
#define elf_backend_size_dynamic_sections \
|
||
elf_vax_size_dynamic_sections
|
||
#define elf_backend_relocate_section elf_vax_relocate_section
|
||
#define elf_backend_finish_dynamic_symbol \
|
||
elf_vax_finish_dynamic_symbol
|
||
#define elf_backend_finish_dynamic_sections \
|
||
elf_vax_finish_dynamic_sections
|
||
#define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
|
||
#define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
|
||
#define bfd_elf32_bfd_merge_private_bfd_data \
|
||
elf32_vax_merge_private_bfd_data
|
||
#define bfd_elf32_bfd_set_private_flags \
|
||
elf32_vax_set_private_flags
|
||
#define bfd_elf32_bfd_print_private_bfd_data \
|
||
elf32_vax_print_private_bfd_data
|
||
|
||
#define elf_backend_can_gc_sections 1
|
||
#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 16
|
||
#define elf_backend_rela_normal 1
|
||
|
||
#include "elf32-target.h"
|