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jeremybenn |
/* VAX series support for 32-bit ELF
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Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
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2004, 2005, 2006, 2007 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 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "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 (bfd *, bfd_reloc_code_real_type);
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static void rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
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static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
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struct bfd_hash_table *,
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const char *);
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static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
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static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *,
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asection *, const Elf_Internal_Rela *);
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static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
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struct elf_link_hash_entry *);
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static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
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static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *,
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bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *,
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Elf_Internal_Sym *, asection **);
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static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
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struct elf_link_hash_entry *,
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Elf_Internal_Sym *);
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static bfd_boolean elf_vax_finish_dynamic_sections (bfd *,
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struct bfd_link_info *);
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static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword);
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static bfd_boolean elf32_vax_merge_private_bfd_data (bfd *, bfd *);
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static bfd_boolean elf32_vax_print_private_bfd_data (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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| 239 |
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32, /* bitsize */
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FALSE, /* pc_relative */
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| 241 |
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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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| 247 |
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0xffffffff, /* dst_mask */
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| 248 |
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FALSE), /* pcrel_offset */
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| 249 |
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| 250 |
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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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| 254 |
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0, /* bitsize */
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| 255 |
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FALSE, /* pc_relative */
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| 256 |
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0, /* bitpos */
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| 257 |
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complain_overflow_dont, /* complain_on_overflow */
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| 258 |
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NULL, /* special_function */
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| 259 |
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"R_VAX_GNU_VTINHERIT", /* name */
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| 260 |
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FALSE, /* partial_inplace */
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| 261 |
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0, /* src_mask */
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| 262 |
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0, /* dst_mask */
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| 263 |
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FALSE), /* pcrel_offset */
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| 264 |
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| 265 |
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/* GNU extension to record C++ vtable member usage */
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| 266 |
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HOWTO (R_VAX_GNU_VTENTRY, /* type */
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| 267 |
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0, /* rightshift */
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| 268 |
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2, /* size (0 = byte, 1 = short, 2 = long) */
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| 269 |
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0, /* bitsize */
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| 270 |
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FALSE, /* pc_relative */
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| 271 |
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0, /* bitpos */
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| 272 |
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complain_overflow_dont, /* complain_on_overflow */
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| 273 |
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_bfd_elf_rel_vtable_reloc_fn, /* special_function */
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| 274 |
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"R_VAX_GNU_VTENTRY", /* name */
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| 275 |
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FALSE, /* partial_inplace */
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| 276 |
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0, /* src_mask */
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| 277 |
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0, /* dst_mask */
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| 278 |
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FALSE), /* pcrel_offset */
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| 279 |
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};
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| 280 |
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| 281 |
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static void
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| 282 |
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rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
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| 283 |
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Elf_Internal_Rela *dst)
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| 284 |
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{
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| 285 |
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BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
|
| 286 |
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cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
|
| 287 |
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}
|
| 288 |
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|
| 289 |
|
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#define elf_info_to_howto rtype_to_howto
|
| 290 |
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|
|
| 291 |
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static const struct
|
| 292 |
|
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{
|
| 293 |
|
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bfd_reloc_code_real_type bfd_val;
|
| 294 |
|
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int elf_val;
|
| 295 |
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} reloc_map[] = {
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| 296 |
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{ BFD_RELOC_NONE, R_VAX_NONE },
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| 297 |
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{ BFD_RELOC_32, R_VAX_32 },
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| 298 |
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{ BFD_RELOC_16, R_VAX_16 },
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| 299 |
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{ BFD_RELOC_8, R_VAX_8 },
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| 300 |
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{ BFD_RELOC_32_PCREL, R_VAX_PC32 },
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| 301 |
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{ BFD_RELOC_16_PCREL, R_VAX_PC16 },
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| 302 |
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{ BFD_RELOC_8_PCREL, R_VAX_PC8 },
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| 303 |
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{ BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
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| 304 |
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{ BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
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| 305 |
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{ BFD_RELOC_NONE, R_VAX_COPY },
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| 306 |
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{ BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
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| 307 |
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{ BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
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| 308 |
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{ BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
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| 309 |
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{ BFD_RELOC_CTOR, R_VAX_32 },
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| 310 |
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{ BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
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| 311 |
|
|
{ BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
|
| 312 |
|
|
};
|
| 313 |
|
|
|
| 314 |
|
|
static reloc_howto_type *
|
| 315 |
|
|
reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
|
| 316 |
|
|
{
|
| 317 |
|
|
unsigned int i;
|
| 318 |
|
|
for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
|
| 319 |
|
|
{
|
| 320 |
|
|
if (reloc_map[i].bfd_val == code)
|
| 321 |
|
|
return &howto_table[reloc_map[i].elf_val];
|
| 322 |
|
|
}
|
| 323 |
|
|
return 0;
|
| 324 |
|
|
}
|
| 325 |
|
|
|
| 326 |
|
|
static reloc_howto_type *
|
| 327 |
|
|
reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
| 328 |
|
|
const char *r_name)
|
| 329 |
|
|
{
|
| 330 |
|
|
unsigned int i;
|
| 331 |
|
|
|
| 332 |
|
|
for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
|
| 333 |
|
|
if (howto_table[i].name != NULL
|
| 334 |
|
|
&& strcasecmp (howto_table[i].name, r_name) == 0)
|
| 335 |
|
|
return &howto_table[i];
|
| 336 |
|
|
|
| 337 |
|
|
return NULL;
|
| 338 |
|
|
}
|
| 339 |
|
|
|
| 340 |
|
|
#define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
|
| 341 |
|
|
#define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
|
| 342 |
|
|
#define ELF_ARCH bfd_arch_vax
|
| 343 |
|
|
/* end code generated by elf.el */
|
| 344 |
|
|
|
| 345 |
|
|
/* Functions for the VAX ELF linker. */
|
| 346 |
|
|
|
| 347 |
|
|
/* The name of the dynamic interpreter. This is put in the .interp
|
| 348 |
|
|
section. */
|
| 349 |
|
|
|
| 350 |
|
|
#define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
|
| 351 |
|
|
|
| 352 |
|
|
/* The size in bytes of an entry in the procedure linkage table. */
|
| 353 |
|
|
|
| 354 |
|
|
#define PLT_ENTRY_SIZE 12
|
| 355 |
|
|
|
| 356 |
|
|
/* The first entry in a procedure linkage table looks like this. See
|
| 357 |
|
|
the SVR4 ABI VAX supplement to see how this works. */
|
| 358 |
|
|
|
| 359 |
|
|
static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
|
| 360 |
|
|
{
|
| 361 |
|
|
0xdd, 0xef, /* pushl l^ */
|
| 362 |
|
|
0, 0, 0, 0, /* offset to .plt.got + 4 */
|
| 363 |
|
|
0x17, 0xff, /* jmp @L^(pc) */
|
| 364 |
|
|
0, 0, 0, 0, /* offset to .plt.got + 8 */
|
| 365 |
|
|
};
|
| 366 |
|
|
|
| 367 |
|
|
/* Subsequent entries in a procedure linkage table look like this. */
|
| 368 |
|
|
|
| 369 |
|
|
static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
|
| 370 |
|
|
{
|
| 371 |
|
|
0x40, 0x00, /* .word ^M<r6> */
|
| 372 |
|
|
0x16, 0xef, /* jsb L^(pc) */
|
| 373 |
|
|
0, 0, 0, 0, /* replaced with offset to start of .plt */
|
| 374 |
|
|
0, 0, 0, 0, /* index into .rela.plt */
|
| 375 |
|
|
};
|
| 376 |
|
|
|
| 377 |
|
|
/* The VAX linker needs to keep track of the number of relocs that it
|
| 378 |
|
|
decides to copy in check_relocs for each symbol. This is so that it
|
| 379 |
|
|
can discard PC relative relocs if it doesn't need them when linking
|
| 380 |
|
|
with -Bsymbolic. We store the information in a field extending the
|
| 381 |
|
|
regular ELF linker hash table. */
|
| 382 |
|
|
|
| 383 |
|
|
/* This structure keeps track of the number of PC relative relocs we have
|
| 384 |
|
|
copied for a given symbol. */
|
| 385 |
|
|
|
| 386 |
|
|
struct elf_vax_pcrel_relocs_copied
|
| 387 |
|
|
{
|
| 388 |
|
|
/* Next section. */
|
| 389 |
|
|
struct elf_vax_pcrel_relocs_copied *next;
|
| 390 |
|
|
/* A section in dynobj. */
|
| 391 |
|
|
asection *section;
|
| 392 |
|
|
/* Number of relocs copied in this section. */
|
| 393 |
|
|
bfd_size_type count;
|
| 394 |
|
|
};
|
| 395 |
|
|
|
| 396 |
|
|
/* VAX ELF linker hash entry. */
|
| 397 |
|
|
|
| 398 |
|
|
struct elf_vax_link_hash_entry
|
| 399 |
|
|
{
|
| 400 |
|
|
struct elf_link_hash_entry root;
|
| 401 |
|
|
|
| 402 |
|
|
/* Number of PC relative relocs copied for this symbol. */
|
| 403 |
|
|
struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
|
| 404 |
|
|
|
| 405 |
|
|
bfd_vma got_addend;
|
| 406 |
|
|
};
|
| 407 |
|
|
|
| 408 |
|
|
/* VAX ELF linker hash table. */
|
| 409 |
|
|
|
| 410 |
|
|
struct elf_vax_link_hash_table
|
| 411 |
|
|
{
|
| 412 |
|
|
struct elf_link_hash_table root;
|
| 413 |
|
|
};
|
| 414 |
|
|
|
| 415 |
|
|
/* Declare this now that the above structures are defined. */
|
| 416 |
|
|
|
| 417 |
|
|
static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
|
| 418 |
|
|
PTR);
|
| 419 |
|
|
|
| 420 |
|
|
/* Declare this now that the above structures are defined. */
|
| 421 |
|
|
|
| 422 |
|
|
static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
|
| 423 |
|
|
PTR);
|
| 424 |
|
|
|
| 425 |
|
|
/* Traverse an VAX ELF linker hash table. */
|
| 426 |
|
|
|
| 427 |
|
|
#define elf_vax_link_hash_traverse(table, func, info) \
|
| 428 |
|
|
(elf_link_hash_traverse \
|
| 429 |
|
|
(&(table)->root, \
|
| 430 |
|
|
(bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \
|
| 431 |
|
|
(info)))
|
| 432 |
|
|
|
| 433 |
|
|
/* Get the VAX ELF linker hash table from a link_info structure. */
|
| 434 |
|
|
|
| 435 |
|
|
#define elf_vax_hash_table(p) ((struct elf_vax_link_hash_table *) (p)->hash)
|
| 436 |
|
|
|
| 437 |
|
|
/* Create an entry in an VAX ELF linker hash table. */
|
| 438 |
|
|
|
| 439 |
|
|
static struct bfd_hash_entry *
|
| 440 |
|
|
elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
|
| 441 |
|
|
struct bfd_hash_table *table,
|
| 442 |
|
|
const char *string)
|
| 443 |
|
|
{
|
| 444 |
|
|
struct elf_vax_link_hash_entry *ret =
|
| 445 |
|
|
(struct elf_vax_link_hash_entry *) entry;
|
| 446 |
|
|
|
| 447 |
|
|
/* Allocate the structure if it has not already been allocated by a
|
| 448 |
|
|
subclass. */
|
| 449 |
|
|
if (ret == NULL)
|
| 450 |
|
|
ret = ((struct elf_vax_link_hash_entry *)
|
| 451 |
|
|
bfd_hash_allocate (table,
|
| 452 |
|
|
sizeof (struct elf_vax_link_hash_entry)));
|
| 453 |
|
|
if (ret == NULL)
|
| 454 |
|
|
return (struct bfd_hash_entry *) ret;
|
| 455 |
|
|
|
| 456 |
|
|
/* Call the allocation method of the superclass. */
|
| 457 |
|
|
ret = ((struct elf_vax_link_hash_entry *)
|
| 458 |
|
|
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
| 459 |
|
|
table, string));
|
| 460 |
|
|
if (ret != NULL)
|
| 461 |
|
|
{
|
| 462 |
|
|
ret->pcrel_relocs_copied = NULL;
|
| 463 |
|
|
}
|
| 464 |
|
|
|
| 465 |
|
|
return (struct bfd_hash_entry *) ret;
|
| 466 |
|
|
}
|
| 467 |
|
|
|
| 468 |
|
|
/* Create an VAX ELF linker hash table. */
|
| 469 |
|
|
|
| 470 |
|
|
static struct bfd_link_hash_table *
|
| 471 |
|
|
elf_vax_link_hash_table_create (bfd *abfd)
|
| 472 |
|
|
{
|
| 473 |
|
|
struct elf_vax_link_hash_table *ret;
|
| 474 |
|
|
bfd_size_type amt = sizeof (struct elf_vax_link_hash_table);
|
| 475 |
|
|
|
| 476 |
|
|
ret = bfd_malloc (amt);
|
| 477 |
|
|
if (ret == NULL)
|
| 478 |
|
|
return NULL;
|
| 479 |
|
|
|
| 480 |
|
|
if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
|
| 481 |
|
|
elf_vax_link_hash_newfunc,
|
| 482 |
|
|
sizeof (struct elf_vax_link_hash_entry)))
|
| 483 |
|
|
{
|
| 484 |
|
|
free (ret);
|
| 485 |
|
|
return NULL;
|
| 486 |
|
|
}
|
| 487 |
|
|
|
| 488 |
|
|
return &ret->root.root;
|
| 489 |
|
|
}
|
| 490 |
|
|
|
| 491 |
|
|
/* Keep vax-specific flags in the ELF header */
|
| 492 |
|
|
static bfd_boolean
|
| 493 |
|
|
elf32_vax_set_private_flags (bfd *abfd, flagword flags)
|
| 494 |
|
|
{
|
| 495 |
|
|
elf_elfheader (abfd)->e_flags = flags;
|
| 496 |
|
|
elf_flags_init (abfd) = TRUE;
|
| 497 |
|
|
return TRUE;
|
| 498 |
|
|
}
|
| 499 |
|
|
|
| 500 |
|
|
/* Merge backend specific data from an object file to the output
|
| 501 |
|
|
object file when linking. */
|
| 502 |
|
|
static bfd_boolean
|
| 503 |
|
|
elf32_vax_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
|
| 504 |
|
|
{
|
| 505 |
|
|
flagword out_flags;
|
| 506 |
|
|
flagword in_flags;
|
| 507 |
|
|
|
| 508 |
|
|
if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
| 509 |
|
|
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
| 510 |
|
|
return TRUE;
|
| 511 |
|
|
|
| 512 |
|
|
in_flags = elf_elfheader (ibfd)->e_flags;
|
| 513 |
|
|
out_flags = elf_elfheader (obfd)->e_flags;
|
| 514 |
|
|
|
| 515 |
|
|
if (!elf_flags_init (obfd))
|
| 516 |
|
|
{
|
| 517 |
|
|
elf_flags_init (obfd) = TRUE;
|
| 518 |
|
|
elf_elfheader (obfd)->e_flags = in_flags;
|
| 519 |
|
|
}
|
| 520 |
|
|
|
| 521 |
|
|
return TRUE;
|
| 522 |
|
|
}
|
| 523 |
|
|
|
| 524 |
|
|
/* Display the flags field */
|
| 525 |
|
|
static bfd_boolean
|
| 526 |
|
|
elf32_vax_print_private_bfd_data (bfd *abfd, PTR ptr)
|
| 527 |
|
|
{
|
| 528 |
|
|
FILE *file = (FILE *) ptr;
|
| 529 |
|
|
|
| 530 |
|
|
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
| 531 |
|
|
|
| 532 |
|
|
/* Print normal ELF private data. */
|
| 533 |
|
|
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
| 534 |
|
|
|
| 535 |
|
|
/* Ignore init flag - it may not be set, despite the flags field containing valid data. */
|
| 536 |
|
|
|
| 537 |
|
|
/* xgettext:c-format */
|
| 538 |
|
|
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
|
| 539 |
|
|
|
| 540 |
|
|
if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
|
| 541 |
|
|
fprintf (file, _(" [nonpic]"));
|
| 542 |
|
|
|
| 543 |
|
|
if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
|
| 544 |
|
|
fprintf (file, _(" [d-float]"));
|
| 545 |
|
|
|
| 546 |
|
|
if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
|
| 547 |
|
|
fprintf (file, _(" [g-float]"));
|
| 548 |
|
|
|
| 549 |
|
|
fputc ('\n', file);
|
| 550 |
|
|
|
| 551 |
|
|
return TRUE;
|
| 552 |
|
|
}
|
| 553 |
|
|
/* Look through the relocs for a section during the first phase, and
|
| 554 |
|
|
allocate space in the global offset table or procedure linkage
|
| 555 |
|
|
table. */
|
| 556 |
|
|
|
| 557 |
|
|
static bfd_boolean
|
| 558 |
|
|
elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
|
| 559 |
|
|
const Elf_Internal_Rela *relocs)
|
| 560 |
|
|
{
|
| 561 |
|
|
bfd *dynobj;
|
| 562 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 563 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
| 564 |
|
|
const Elf_Internal_Rela *rel;
|
| 565 |
|
|
const Elf_Internal_Rela *rel_end;
|
| 566 |
|
|
asection *sgot;
|
| 567 |
|
|
asection *srelgot;
|
| 568 |
|
|
asection *sreloc;
|
| 569 |
|
|
|
| 570 |
|
|
if (info->relocatable)
|
| 571 |
|
|
return TRUE;
|
| 572 |
|
|
|
| 573 |
|
|
dynobj = elf_hash_table (info)->dynobj;
|
| 574 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 575 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
| 576 |
|
|
|
| 577 |
|
|
sgot = NULL;
|
| 578 |
|
|
srelgot = NULL;
|
| 579 |
|
|
sreloc = NULL;
|
| 580 |
|
|
|
| 581 |
|
|
rel_end = relocs + sec->reloc_count;
|
| 582 |
|
|
for (rel = relocs; rel < rel_end; rel++)
|
| 583 |
|
|
{
|
| 584 |
|
|
unsigned long r_symndx;
|
| 585 |
|
|
struct elf_link_hash_entry *h;
|
| 586 |
|
|
|
| 587 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 588 |
|
|
|
| 589 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 590 |
|
|
h = NULL;
|
| 591 |
|
|
else
|
| 592 |
|
|
{
|
| 593 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
| 594 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
| 595 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
| 596 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
| 597 |
|
|
}
|
| 598 |
|
|
|
| 599 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
| 600 |
|
|
{
|
| 601 |
|
|
case R_VAX_GOT32:
|
| 602 |
|
|
if (h != NULL
|
| 603 |
|
|
&& strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
|
| 604 |
|
|
break;
|
| 605 |
|
|
|
| 606 |
|
|
/* This symbol requires a global offset table entry. */
|
| 607 |
|
|
|
| 608 |
|
|
if (dynobj == NULL)
|
| 609 |
|
|
{
|
| 610 |
|
|
/* Create the .got section. */
|
| 611 |
|
|
elf_hash_table (info)->dynobj = dynobj = abfd;
|
| 612 |
|
|
if (!_bfd_elf_create_got_section (dynobj, info))
|
| 613 |
|
|
return FALSE;
|
| 614 |
|
|
}
|
| 615 |
|
|
|
| 616 |
|
|
if (sgot == NULL)
|
| 617 |
|
|
{
|
| 618 |
|
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
| 619 |
|
|
BFD_ASSERT (sgot != NULL);
|
| 620 |
|
|
}
|
| 621 |
|
|
|
| 622 |
|
|
if (srelgot == NULL
|
| 623 |
|
|
&& (h != NULL || info->shared))
|
| 624 |
|
|
{
|
| 625 |
|
|
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
| 626 |
|
|
if (srelgot == NULL)
|
| 627 |
|
|
{
|
| 628 |
|
|
srelgot = bfd_make_section_with_flags (dynobj,
|
| 629 |
|
|
".rela.got",
|
| 630 |
|
|
(SEC_ALLOC
|
| 631 |
|
|
| SEC_LOAD
|
| 632 |
|
|
| SEC_HAS_CONTENTS
|
| 633 |
|
|
| SEC_IN_MEMORY
|
| 634 |
|
|
| SEC_LINKER_CREATED
|
| 635 |
|
|
| SEC_READONLY));
|
| 636 |
|
|
if (srelgot == NULL
|
| 637 |
|
|
|| !bfd_set_section_alignment (dynobj, srelgot, 2))
|
| 638 |
|
|
return FALSE;
|
| 639 |
|
|
}
|
| 640 |
|
|
}
|
| 641 |
|
|
|
| 642 |
|
|
if (h != NULL)
|
| 643 |
|
|
{
|
| 644 |
|
|
struct elf_vax_link_hash_entry *eh;
|
| 645 |
|
|
|
| 646 |
|
|
eh = (struct elf_vax_link_hash_entry *) h;
|
| 647 |
|
|
if (h->got.refcount == -1)
|
| 648 |
|
|
{
|
| 649 |
|
|
h->got.refcount = 1;
|
| 650 |
|
|
eh->got_addend = rel->r_addend;
|
| 651 |
|
|
}
|
| 652 |
|
|
else
|
| 653 |
|
|
{
|
| 654 |
|
|
h->got.refcount++;
|
| 655 |
|
|
if (eh->got_addend != (bfd_vma) rel->r_addend)
|
| 656 |
|
|
(*_bfd_error_handler)
|
| 657 |
|
|
(_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"),
|
| 658 |
|
|
bfd_get_filename (abfd), rel->r_addend,
|
| 659 |
|
|
h->root.root.string,
|
| 660 |
|
|
eh->got_addend);
|
| 661 |
|
|
|
| 662 |
|
|
}
|
| 663 |
|
|
}
|
| 664 |
|
|
break;
|
| 665 |
|
|
|
| 666 |
|
|
case R_VAX_PLT32:
|
| 667 |
|
|
/* This symbol requires a procedure linkage table entry. We
|
| 668 |
|
|
actually build the entry in adjust_dynamic_symbol,
|
| 669 |
|
|
because this might be a case of linking PIC code which is
|
| 670 |
|
|
never referenced by a dynamic object, in which case we
|
| 671 |
|
|
don't need to generate a procedure linkage table entry
|
| 672 |
|
|
after all. */
|
| 673 |
|
|
|
| 674 |
|
|
/* If this is a local symbol, we resolve it directly without
|
| 675 |
|
|
creating a procedure linkage table entry. */
|
| 676 |
|
|
if (h == NULL)
|
| 677 |
|
|
continue;
|
| 678 |
|
|
|
| 679 |
|
|
h->needs_plt = 1;
|
| 680 |
|
|
if (h->plt.refcount == -1)
|
| 681 |
|
|
h->plt.refcount = 1;
|
| 682 |
|
|
else
|
| 683 |
|
|
h->plt.refcount++;
|
| 684 |
|
|
break;
|
| 685 |
|
|
|
| 686 |
|
|
case R_VAX_PC8:
|
| 687 |
|
|
case R_VAX_PC16:
|
| 688 |
|
|
case R_VAX_PC32:
|
| 689 |
|
|
/* If we are creating a shared library and this is not a local
|
| 690 |
|
|
symbol, we need to copy the reloc into the shared library.
|
| 691 |
|
|
However when linking with -Bsymbolic and this is a global
|
| 692 |
|
|
symbol which is defined in an object we are including in the
|
| 693 |
|
|
link (i.e., DEF_REGULAR is set), then we can resolve the
|
| 694 |
|
|
reloc directly. At this point we have not seen all the input
|
| 695 |
|
|
files, so it is possible that DEF_REGULAR is not set now but
|
| 696 |
|
|
will be set later (it is never cleared). We account for that
|
| 697 |
|
|
possibility below by storing information in the
|
| 698 |
|
|
pcrel_relocs_copied field of the hash table entry. */
|
| 699 |
|
|
if (!(info->shared
|
| 700 |
|
|
&& (sec->flags & SEC_ALLOC) != 0
|
| 701 |
|
|
&& h != NULL
|
| 702 |
|
|
&& (!info->symbolic
|
| 703 |
|
|
|| !h->def_regular)))
|
| 704 |
|
|
{
|
| 705 |
|
|
if (h != NULL)
|
| 706 |
|
|
{
|
| 707 |
|
|
/* Make sure a plt entry is created for this symbol if
|
| 708 |
|
|
it turns out to be a function defined by a dynamic
|
| 709 |
|
|
object. */
|
| 710 |
|
|
if (h->plt.refcount == -1)
|
| 711 |
|
|
h->plt.refcount = 1;
|
| 712 |
|
|
else
|
| 713 |
|
|
h->plt.refcount++;
|
| 714 |
|
|
}
|
| 715 |
|
|
break;
|
| 716 |
|
|
}
|
| 717 |
|
|
/* Fall through. */
|
| 718 |
|
|
case R_VAX_8:
|
| 719 |
|
|
case R_VAX_16:
|
| 720 |
|
|
case R_VAX_32:
|
| 721 |
|
|
if (h != NULL)
|
| 722 |
|
|
{
|
| 723 |
|
|
/* Make sure a plt entry is created for this symbol if it
|
| 724 |
|
|
turns out to be a function defined by a dynamic object. */
|
| 725 |
|
|
if (h->plt.refcount == -1)
|
| 726 |
|
|
h->plt.refcount = 1;
|
| 727 |
|
|
else
|
| 728 |
|
|
h->plt.refcount++;
|
| 729 |
|
|
}
|
| 730 |
|
|
|
| 731 |
|
|
/* If we are creating a shared library, we need to copy the
|
| 732 |
|
|
reloc into the shared library. */
|
| 733 |
|
|
if (info->shared
|
| 734 |
|
|
&& (sec->flags & SEC_ALLOC) != 0)
|
| 735 |
|
|
{
|
| 736 |
|
|
/* When creating a shared object, we must copy these
|
| 737 |
|
|
reloc types into the output file. We create a reloc
|
| 738 |
|
|
section in dynobj and make room for this reloc. */
|
| 739 |
|
|
if (sreloc == NULL)
|
| 740 |
|
|
{
|
| 741 |
|
|
const char *name;
|
| 742 |
|
|
|
| 743 |
|
|
name = (bfd_elf_string_from_elf_section
|
| 744 |
|
|
(abfd,
|
| 745 |
|
|
elf_elfheader (abfd)->e_shstrndx,
|
| 746 |
|
|
elf_section_data (sec)->rel_hdr.sh_name));
|
| 747 |
|
|
if (name == NULL)
|
| 748 |
|
|
return FALSE;
|
| 749 |
|
|
|
| 750 |
|
|
BFD_ASSERT (CONST_STRNEQ (name, ".rela")
|
| 751 |
|
|
&& strcmp (bfd_get_section_name (abfd, sec),
|
| 752 |
|
|
name + 5) == 0);
|
| 753 |
|
|
|
| 754 |
|
|
sreloc = bfd_get_section_by_name (dynobj, name);
|
| 755 |
|
|
if (sreloc == NULL)
|
| 756 |
|
|
{
|
| 757 |
|
|
sreloc = bfd_make_section_with_flags (dynobj,
|
| 758 |
|
|
name,
|
| 759 |
|
|
(SEC_ALLOC
|
| 760 |
|
|
| SEC_LOAD
|
| 761 |
|
|
| SEC_HAS_CONTENTS
|
| 762 |
|
|
| SEC_IN_MEMORY
|
| 763 |
|
|
| SEC_LINKER_CREATED
|
| 764 |
|
|
| SEC_READONLY));
|
| 765 |
|
|
if (sreloc == NULL
|
| 766 |
|
|
|| !bfd_set_section_alignment (dynobj, sreloc, 2))
|
| 767 |
|
|
return FALSE;
|
| 768 |
|
|
}
|
| 769 |
|
|
if (sec->flags & SEC_READONLY)
|
| 770 |
|
|
info->flags |= DF_TEXTREL;
|
| 771 |
|
|
}
|
| 772 |
|
|
|
| 773 |
|
|
sreloc->size += sizeof (Elf32_External_Rela);
|
| 774 |
|
|
|
| 775 |
|
|
/* If we are linking with -Bsymbolic, we count the number of
|
| 776 |
|
|
PC relative relocations we have entered for this symbol,
|
| 777 |
|
|
so that we can discard them again if the symbol is later
|
| 778 |
|
|
defined by a regular object. Note that this function is
|
| 779 |
|
|
only called if we are using a vaxelf linker hash table,
|
| 780 |
|
|
which means that h is really a pointer to an
|
| 781 |
|
|
elf_vax_link_hash_entry. */
|
| 782 |
|
|
if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
|
| 783 |
|
|
|| ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
|
| 784 |
|
|
|| ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
|
| 785 |
|
|
&& info->symbolic)
|
| 786 |
|
|
{
|
| 787 |
|
|
struct elf_vax_link_hash_entry *eh;
|
| 788 |
|
|
struct elf_vax_pcrel_relocs_copied *p;
|
| 789 |
|
|
|
| 790 |
|
|
eh = (struct elf_vax_link_hash_entry *) h;
|
| 791 |
|
|
|
| 792 |
|
|
for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
|
| 793 |
|
|
if (p->section == sreloc)
|
| 794 |
|
|
break;
|
| 795 |
|
|
|
| 796 |
|
|
if (p == NULL)
|
| 797 |
|
|
{
|
| 798 |
|
|
p = ((struct elf_vax_pcrel_relocs_copied *)
|
| 799 |
|
|
bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
|
| 800 |
|
|
if (p == NULL)
|
| 801 |
|
|
return FALSE;
|
| 802 |
|
|
p->next = eh->pcrel_relocs_copied;
|
| 803 |
|
|
eh->pcrel_relocs_copied = p;
|
| 804 |
|
|
p->section = sreloc;
|
| 805 |
|
|
p->count = 0;
|
| 806 |
|
|
}
|
| 807 |
|
|
|
| 808 |
|
|
++p->count;
|
| 809 |
|
|
}
|
| 810 |
|
|
}
|
| 811 |
|
|
|
| 812 |
|
|
break;
|
| 813 |
|
|
|
| 814 |
|
|
/* This relocation describes the C++ object vtable hierarchy.
|
| 815 |
|
|
Reconstruct it for later use during GC. */
|
| 816 |
|
|
case R_VAX_GNU_VTINHERIT:
|
| 817 |
|
|
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
| 818 |
|
|
return FALSE;
|
| 819 |
|
|
break;
|
| 820 |
|
|
|
| 821 |
|
|
/* This relocation describes which C++ vtable entries are actually
|
| 822 |
|
|
used. Record for later use during GC. */
|
| 823 |
|
|
case R_VAX_GNU_VTENTRY:
|
| 824 |
|
|
BFD_ASSERT (h != NULL);
|
| 825 |
|
|
if (h != NULL
|
| 826 |
|
|
&& !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
| 827 |
|
|
return FALSE;
|
| 828 |
|
|
break;
|
| 829 |
|
|
|
| 830 |
|
|
default:
|
| 831 |
|
|
break;
|
| 832 |
|
|
}
|
| 833 |
|
|
}
|
| 834 |
|
|
|
| 835 |
|
|
return TRUE;
|
| 836 |
|
|
}
|
| 837 |
|
|
|
| 838 |
|
|
/* Return the section that should be marked against GC for a given
|
| 839 |
|
|
relocation. */
|
| 840 |
|
|
|
| 841 |
|
|
static asection *
|
| 842 |
|
|
elf_vax_gc_mark_hook (asection *sec,
|
| 843 |
|
|
struct bfd_link_info *info,
|
| 844 |
|
|
Elf_Internal_Rela *rel,
|
| 845 |
|
|
struct elf_link_hash_entry *h,
|
| 846 |
|
|
Elf_Internal_Sym *sym)
|
| 847 |
|
|
{
|
| 848 |
|
|
if (h != NULL)
|
| 849 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
| 850 |
|
|
{
|
| 851 |
|
|
case R_VAX_GNU_VTINHERIT:
|
| 852 |
|
|
case R_VAX_GNU_VTENTRY:
|
| 853 |
|
|
return NULL;
|
| 854 |
|
|
}
|
| 855 |
|
|
|
| 856 |
|
|
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
|
| 857 |
|
|
}
|
| 858 |
|
|
|
| 859 |
|
|
/* Update the got entry reference counts for the section being removed. */
|
| 860 |
|
|
|
| 861 |
|
|
static bfd_boolean
|
| 862 |
|
|
elf_vax_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec,
|
| 863 |
|
|
const Elf_Internal_Rela *relocs)
|
| 864 |
|
|
{
|
| 865 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 866 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
| 867 |
|
|
const Elf_Internal_Rela *rel, *relend;
|
| 868 |
|
|
bfd *dynobj;
|
| 869 |
|
|
|
| 870 |
|
|
if (info->relocatable)
|
| 871 |
|
|
return TRUE;
|
| 872 |
|
|
|
| 873 |
|
|
dynobj = elf_hash_table (info)->dynobj;
|
| 874 |
|
|
if (dynobj == NULL)
|
| 875 |
|
|
return TRUE;
|
| 876 |
|
|
|
| 877 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 878 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
| 879 |
|
|
|
| 880 |
|
|
relend = relocs + sec->reloc_count;
|
| 881 |
|
|
for (rel = relocs; rel < relend; rel++)
|
| 882 |
|
|
{
|
| 883 |
|
|
unsigned long r_symndx;
|
| 884 |
|
|
struct elf_link_hash_entry *h = NULL;
|
| 885 |
|
|
|
| 886 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 887 |
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
| 888 |
|
|
{
|
| 889 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
| 890 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
| 891 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
| 892 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
| 893 |
|
|
}
|
| 894 |
|
|
|
| 895 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
| 896 |
|
|
{
|
| 897 |
|
|
case R_VAX_GOT32:
|
| 898 |
|
|
if (h != NULL && h->got.refcount > 0)
|
| 899 |
|
|
--h->got.refcount;
|
| 900 |
|
|
break;
|
| 901 |
|
|
|
| 902 |
|
|
case R_VAX_PLT32:
|
| 903 |
|
|
case R_VAX_PC8:
|
| 904 |
|
|
case R_VAX_PC16:
|
| 905 |
|
|
case R_VAX_PC32:
|
| 906 |
|
|
case R_VAX_8:
|
| 907 |
|
|
case R_VAX_16:
|
| 908 |
|
|
case R_VAX_32:
|
| 909 |
|
|
if (h != NULL && h->plt.refcount > 0)
|
| 910 |
|
|
--h->plt.refcount;
|
| 911 |
|
|
break;
|
| 912 |
|
|
|
| 913 |
|
|
default:
|
| 914 |
|
|
break;
|
| 915 |
|
|
}
|
| 916 |
|
|
}
|
| 917 |
|
|
|
| 918 |
|
|
return TRUE;
|
| 919 |
|
|
}
|
| 920 |
|
|
|
| 921 |
|
|
/* Adjust a symbol defined by a dynamic object and referenced by a
|
| 922 |
|
|
regular object. The current definition is in some section of the
|
| 923 |
|
|
dynamic object, but we're not including those sections. We have to
|
| 924 |
|
|
change the definition to something the rest of the link can
|
| 925 |
|
|
understand. */
|
| 926 |
|
|
|
| 927 |
|
|
static bfd_boolean
|
| 928 |
|
|
elf_vax_adjust_dynamic_symbol (info, h)
|
| 929 |
|
|
struct bfd_link_info *info;
|
| 930 |
|
|
struct elf_link_hash_entry *h;
|
| 931 |
|
|
{
|
| 932 |
|
|
bfd *dynobj;
|
| 933 |
|
|
asection *s;
|
| 934 |
|
|
|
| 935 |
|
|
dynobj = elf_hash_table (info)->dynobj;
|
| 936 |
|
|
|
| 937 |
|
|
/* Make sure we know what is going on here. */
|
| 938 |
|
|
BFD_ASSERT (dynobj != NULL
|
| 939 |
|
|
&& (h->needs_plt
|
| 940 |
|
|
|| h->u.weakdef != NULL
|
| 941 |
|
|
|| (h->def_dynamic
|
| 942 |
|
|
&& h->ref_regular
|
| 943 |
|
|
&& !h->def_regular)));
|
| 944 |
|
|
|
| 945 |
|
|
/* If this is a function, put it in the procedure linkage table. We
|
| 946 |
|
|
will fill in the contents of the procedure linkage table later,
|
| 947 |
|
|
when we know the address of the .got section. */
|
| 948 |
|
|
if (h->type == STT_FUNC
|
| 949 |
|
|
|| h->needs_plt)
|
| 950 |
|
|
{
|
| 951 |
|
|
if (! info->shared
|
| 952 |
|
|
&& !h->def_dynamic
|
| 953 |
|
|
&& !h->ref_dynamic
|
| 954 |
|
|
/* We must always create the plt entry if it was referenced
|
| 955 |
|
|
by a PLTxxO relocation. In this case we already recorded
|
| 956 |
|
|
it as a dynamic symbol. */
|
| 957 |
|
|
&& h->dynindx == -1)
|
| 958 |
|
|
{
|
| 959 |
|
|
/* This case can occur if we saw a PLTxx reloc in an input
|
| 960 |
|
|
file, but the symbol was never referred to by a dynamic
|
| 961 |
|
|
object. In such a case, we don't actually need to build
|
| 962 |
|
|
a procedure linkage table, and we can just do a PCxx
|
| 963 |
|
|
reloc instead. */
|
| 964 |
|
|
BFD_ASSERT (h->needs_plt);
|
| 965 |
|
|
h->plt.offset = (bfd_vma) -1;
|
| 966 |
|
|
return TRUE;
|
| 967 |
|
|
}
|
| 968 |
|
|
|
| 969 |
|
|
/* GC may have rendered this entry unused. */
|
| 970 |
|
|
if (h->plt.refcount <= 0)
|
| 971 |
|
|
{
|
| 972 |
|
|
h->needs_plt = 0;
|
| 973 |
|
|
h->plt.offset = (bfd_vma) -1;
|
| 974 |
|
|
return TRUE;
|
| 975 |
|
|
}
|
| 976 |
|
|
|
| 977 |
|
|
/* Make sure this symbol is output as a dynamic symbol. */
|
| 978 |
|
|
if (h->dynindx == -1)
|
| 979 |
|
|
{
|
| 980 |
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
| 981 |
|
|
return FALSE;
|
| 982 |
|
|
}
|
| 983 |
|
|
|
| 984 |
|
|
s = bfd_get_section_by_name (dynobj, ".plt");
|
| 985 |
|
|
BFD_ASSERT (s != NULL);
|
| 986 |
|
|
|
| 987 |
|
|
/* If this is the first .plt entry, make room for the special
|
| 988 |
|
|
first entry. */
|
| 989 |
|
|
if (s->size == 0)
|
| 990 |
|
|
{
|
| 991 |
|
|
s->size += PLT_ENTRY_SIZE;
|
| 992 |
|
|
}
|
| 993 |
|
|
|
| 994 |
|
|
/* If this symbol is not defined in a regular file, and we are
|
| 995 |
|
|
not generating a shared library, then set the symbol to this
|
| 996 |
|
|
location in the .plt. This is required to make function
|
| 997 |
|
|
pointers compare as equal between the normal executable and
|
| 998 |
|
|
the shared library. */
|
| 999 |
|
|
if (!info->shared
|
| 1000 |
|
|
&& !h->def_regular)
|
| 1001 |
|
|
{
|
| 1002 |
|
|
h->root.u.def.section = s;
|
| 1003 |
|
|
h->root.u.def.value = s->size;
|
| 1004 |
|
|
}
|
| 1005 |
|
|
|
| 1006 |
|
|
h->plt.offset = s->size;
|
| 1007 |
|
|
|
| 1008 |
|
|
/* Make room for this entry. */
|
| 1009 |
|
|
s->size += PLT_ENTRY_SIZE;
|
| 1010 |
|
|
|
| 1011 |
|
|
/* We also need to make an entry in the .got.plt section, which
|
| 1012 |
|
|
will be placed in the .got section by the linker script. */
|
| 1013 |
|
|
|
| 1014 |
|
|
s = bfd_get_section_by_name (dynobj, ".got.plt");
|
| 1015 |
|
|
BFD_ASSERT (s != NULL);
|
| 1016 |
|
|
s->size += 4;
|
| 1017 |
|
|
|
| 1018 |
|
|
/* We also need to make an entry in the .rela.plt section. */
|
| 1019 |
|
|
|
| 1020 |
|
|
s = bfd_get_section_by_name (dynobj, ".rela.plt");
|
| 1021 |
|
|
BFD_ASSERT (s != NULL);
|
| 1022 |
|
|
s->size += sizeof (Elf32_External_Rela);
|
| 1023 |
|
|
|
| 1024 |
|
|
return TRUE;
|
| 1025 |
|
|
}
|
| 1026 |
|
|
|
| 1027 |
|
|
/* Reinitialize the plt offset now that it is not used as a reference
|
| 1028 |
|
|
count any more. */
|
| 1029 |
|
|
h->plt.offset = (bfd_vma) -1;
|
| 1030 |
|
|
|
| 1031 |
|
|
/* If this is a weak symbol, and there is a real definition, the
|
| 1032 |
|
|
processor independent code will have arranged for us to see the
|
| 1033 |
|
|
real definition first, and we can just use the same value. */
|
| 1034 |
|
|
if (h->u.weakdef != NULL)
|
| 1035 |
|
|
{
|
| 1036 |
|
|
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|
| 1037 |
|
|
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
|
| 1038 |
|
|
h->root.u.def.section = h->u.weakdef->root.u.def.section;
|
| 1039 |
|
|
h->root.u.def.value = h->u.weakdef->root.u.def.value;
|
| 1040 |
|
|
return TRUE;
|
| 1041 |
|
|
}
|
| 1042 |
|
|
|
| 1043 |
|
|
/* This is a reference to a symbol defined by a dynamic object which
|
| 1044 |
|
|
is not a function. */
|
| 1045 |
|
|
|
| 1046 |
|
|
/* If we are creating a shared library, we must presume that the
|
| 1047 |
|
|
only references to the symbol are via the global offset table.
|
| 1048 |
|
|
For such cases we need not do anything here; the relocations will
|
| 1049 |
|
|
be handled correctly by relocate_section. */
|
| 1050 |
|
|
if (info->shared)
|
| 1051 |
|
|
return TRUE;
|
| 1052 |
|
|
|
| 1053 |
|
|
if (h->size == 0)
|
| 1054 |
|
|
{
|
| 1055 |
|
|
(*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
|
| 1056 |
|
|
h->root.root.string);
|
| 1057 |
|
|
return TRUE;
|
| 1058 |
|
|
}
|
| 1059 |
|
|
|
| 1060 |
|
|
/* We must allocate the symbol in our .dynbss section, which will
|
| 1061 |
|
|
become part of the .bss section of the executable. There will be
|
| 1062 |
|
|
an entry for this symbol in the .dynsym section. The dynamic
|
| 1063 |
|
|
object will contain position independent code, so all references
|
| 1064 |
|
|
from the dynamic object to this symbol will go through the global
|
| 1065 |
|
|
offset table. The dynamic linker will use the .dynsym entry to
|
| 1066 |
|
|
determine the address it must put in the global offset table, so
|
| 1067 |
|
|
both the dynamic object and the regular object will refer to the
|
| 1068 |
|
|
same memory location for the variable. */
|
| 1069 |
|
|
|
| 1070 |
|
|
s = bfd_get_section_by_name (dynobj, ".dynbss");
|
| 1071 |
|
|
BFD_ASSERT (s != NULL);
|
| 1072 |
|
|
|
| 1073 |
|
|
/* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
|
| 1074 |
|
|
copy the initial value out of the dynamic object and into the
|
| 1075 |
|
|
runtime process image. We need to remember the offset into the
|
| 1076 |
|
|
.rela.bss section we are going to use. */
|
| 1077 |
|
|
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
| 1078 |
|
|
{
|
| 1079 |
|
|
asection *srel;
|
| 1080 |
|
|
|
| 1081 |
|
|
srel = bfd_get_section_by_name (dynobj, ".rela.bss");
|
| 1082 |
|
|
BFD_ASSERT (srel != NULL);
|
| 1083 |
|
|
srel->size += sizeof (Elf32_External_Rela);
|
| 1084 |
|
|
h->needs_copy = 1;
|
| 1085 |
|
|
}
|
| 1086 |
|
|
|
| 1087 |
|
|
return _bfd_elf_adjust_dynamic_copy (h, s);
|
| 1088 |
|
|
}
|
| 1089 |
|
|
|
| 1090 |
|
|
/* Set the sizes of the dynamic sections. */
|
| 1091 |
|
|
|
| 1092 |
|
|
static bfd_boolean
|
| 1093 |
|
|
elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
|
| 1094 |
|
|
{
|
| 1095 |
|
|
bfd *dynobj;
|
| 1096 |
|
|
asection *s;
|
| 1097 |
|
|
bfd_boolean plt;
|
| 1098 |
|
|
bfd_boolean relocs;
|
| 1099 |
|
|
bfd_boolean reltext;
|
| 1100 |
|
|
|
| 1101 |
|
|
dynobj = elf_hash_table (info)->dynobj;
|
| 1102 |
|
|
BFD_ASSERT (dynobj != NULL);
|
| 1103 |
|
|
|
| 1104 |
|
|
if (elf_hash_table (info)->dynamic_sections_created)
|
| 1105 |
|
|
{
|
| 1106 |
|
|
/* Set the contents of the .interp section to the interpreter. */
|
| 1107 |
|
|
if (info->executable)
|
| 1108 |
|
|
{
|
| 1109 |
|
|
s = bfd_get_section_by_name (dynobj, ".interp");
|
| 1110 |
|
|
BFD_ASSERT (s != NULL);
|
| 1111 |
|
|
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
|
| 1112 |
|
|
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
| 1113 |
|
|
}
|
| 1114 |
|
|
}
|
| 1115 |
|
|
else
|
| 1116 |
|
|
{
|
| 1117 |
|
|
/* We may have created entries in the .rela.got and .got sections.
|
| 1118 |
|
|
However, if we are not creating the dynamic sections, we will
|
| 1119 |
|
|
not actually use these entries. Reset the size of .rela.got
|
| 1120 |
|
|
and .got, which will cause it to get stripped from the output
|
| 1121 |
|
|
file below. */
|
| 1122 |
|
|
s = bfd_get_section_by_name (dynobj, ".rela.got");
|
| 1123 |
|
|
if (s != NULL)
|
| 1124 |
|
|
s->size = 0;
|
| 1125 |
|
|
s = bfd_get_section_by_name (dynobj, ".got.plt");
|
| 1126 |
|
|
if (s != NULL)
|
| 1127 |
|
|
s->size = 0;
|
| 1128 |
|
|
s = bfd_get_section_by_name (dynobj, ".got");
|
| 1129 |
|
|
if (s != NULL)
|
| 1130 |
|
|
s->size = 0;
|
| 1131 |
|
|
}
|
| 1132 |
|
|
|
| 1133 |
|
|
/* If this is a -Bsymbolic shared link, then we need to discard all PC
|
| 1134 |
|
|
relative relocs against symbols defined in a regular object. We
|
| 1135 |
|
|
allocated space for them in the check_relocs routine, but we will not
|
| 1136 |
|
|
fill them in in the relocate_section routine. */
|
| 1137 |
|
|
if (info->shared && info->symbolic)
|
| 1138 |
|
|
elf_vax_link_hash_traverse (elf_vax_hash_table (info),
|
| 1139 |
|
|
elf_vax_discard_copies,
|
| 1140 |
|
|
NULL);
|
| 1141 |
|
|
|
| 1142 |
|
|
/* If this is a -Bsymbolic shared link or a static link, we need to
|
| 1143 |
|
|
discard all the got entries we've recorded. Otherwise, we need to
|
| 1144 |
|
|
instantiate (allocate space for them). */
|
| 1145 |
|
|
elf_link_hash_traverse (elf_hash_table (info),
|
| 1146 |
|
|
elf_vax_instantiate_got_entries,
|
| 1147 |
|
|
(PTR) info);
|
| 1148 |
|
|
|
| 1149 |
|
|
/* The check_relocs and adjust_dynamic_symbol entry points have
|
| 1150 |
|
|
determined the sizes of the various dynamic sections. Allocate
|
| 1151 |
|
|
memory for them. */
|
| 1152 |
|
|
plt = FALSE;
|
| 1153 |
|
|
relocs = FALSE;
|
| 1154 |
|
|
reltext = FALSE;
|
| 1155 |
|
|
for (s = dynobj->sections; s != NULL; s = s->next)
|
| 1156 |
|
|
{
|
| 1157 |
|
|
const char *name;
|
| 1158 |
|
|
|
| 1159 |
|
|
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
| 1160 |
|
|
continue;
|
| 1161 |
|
|
|
| 1162 |
|
|
/* It's OK to base decisions on the section name, because none
|
| 1163 |
|
|
of the dynobj section names depend upon the input files. */
|
| 1164 |
|
|
name = bfd_get_section_name (dynobj, s);
|
| 1165 |
|
|
|
| 1166 |
|
|
if (strcmp (name, ".plt") == 0)
|
| 1167 |
|
|
{
|
| 1168 |
|
|
/* Remember whether there is a PLT. */
|
| 1169 |
|
|
plt = s->size != 0;
|
| 1170 |
|
|
}
|
| 1171 |
|
|
else if (CONST_STRNEQ (name, ".rela"))
|
| 1172 |
|
|
{
|
| 1173 |
|
|
if (s->size != 0)
|
| 1174 |
|
|
{
|
| 1175 |
|
|
asection *target;
|
| 1176 |
|
|
|
| 1177 |
|
|
/* Remember whether there are any reloc sections other
|
| 1178 |
|
|
than .rela.plt. */
|
| 1179 |
|
|
if (strcmp (name, ".rela.plt") != 0)
|
| 1180 |
|
|
{
|
| 1181 |
|
|
const char *outname;
|
| 1182 |
|
|
|
| 1183 |
|
|
relocs = TRUE;
|
| 1184 |
|
|
|
| 1185 |
|
|
/* If this relocation section applies to a read only
|
| 1186 |
|
|
section, then we probably need a DT_TEXTREL
|
| 1187 |
|
|
entry. .rela.plt is actually associated with
|
| 1188 |
|
|
.got.plt, which is never readonly. */
|
| 1189 |
|
|
outname = bfd_get_section_name (output_bfd,
|
| 1190 |
|
|
s->output_section);
|
| 1191 |
|
|
target = bfd_get_section_by_name (output_bfd, outname + 5);
|
| 1192 |
|
|
if (target != NULL
|
| 1193 |
|
|
&& (target->flags & SEC_READONLY) != 0
|
| 1194 |
|
|
&& (target->flags & SEC_ALLOC) != 0)
|
| 1195 |
|
|
reltext = TRUE;
|
| 1196 |
|
|
}
|
| 1197 |
|
|
|
| 1198 |
|
|
/* We use the reloc_count field as a counter if we need
|
| 1199 |
|
|
to copy relocs into the output file. */
|
| 1200 |
|
|
s->reloc_count = 0;
|
| 1201 |
|
|
}
|
| 1202 |
|
|
}
|
| 1203 |
|
|
else if (! CONST_STRNEQ (name, ".got")
|
| 1204 |
|
|
&& strcmp (name, ".dynbss") != 0)
|
| 1205 |
|
|
{
|
| 1206 |
|
|
/* It's not one of our sections, so don't allocate space. */
|
| 1207 |
|
|
continue;
|
| 1208 |
|
|
}
|
| 1209 |
|
|
|
| 1210 |
|
|
if (s->size == 0)
|
| 1211 |
|
|
{
|
| 1212 |
|
|
/* If we don't need this section, strip it from the
|
| 1213 |
|
|
output file. This is mostly to handle .rela.bss and
|
| 1214 |
|
|
.rela.plt. We must create both sections in
|
| 1215 |
|
|
create_dynamic_sections, because they must be created
|
| 1216 |
|
|
before the linker maps input sections to output
|
| 1217 |
|
|
sections. The linker does that before
|
| 1218 |
|
|
adjust_dynamic_symbol is called, and it is that
|
| 1219 |
|
|
function which decides whether anything needs to go
|
| 1220 |
|
|
into these sections. */
|
| 1221 |
|
|
s->flags |= SEC_EXCLUDE;
|
| 1222 |
|
|
continue;
|
| 1223 |
|
|
}
|
| 1224 |
|
|
|
| 1225 |
|
|
if ((s->flags & SEC_HAS_CONTENTS) == 0)
|
| 1226 |
|
|
continue;
|
| 1227 |
|
|
|
| 1228 |
|
|
/* Allocate memory for the section contents. */
|
| 1229 |
|
|
s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
|
| 1230 |
|
|
if (s->contents == NULL)
|
| 1231 |
|
|
return FALSE;
|
| 1232 |
|
|
}
|
| 1233 |
|
|
|
| 1234 |
|
|
if (elf_hash_table (info)->dynamic_sections_created)
|
| 1235 |
|
|
{
|
| 1236 |
|
|
/* Add some entries to the .dynamic section. We fill in the
|
| 1237 |
|
|
values later, in elf_vax_finish_dynamic_sections, but we
|
| 1238 |
|
|
must add the entries now so that we get the correct size for
|
| 1239 |
|
|
the .dynamic section. The DT_DEBUG entry is filled in by the
|
| 1240 |
|
|
dynamic linker and used by the debugger. */
|
| 1241 |
|
|
#define add_dynamic_entry(TAG, VAL) \
|
| 1242 |
|
|
_bfd_elf_add_dynamic_entry (info, TAG, VAL)
|
| 1243 |
|
|
|
| 1244 |
|
|
if (!info->shared)
|
| 1245 |
|
|
{
|
| 1246 |
|
|
if (!add_dynamic_entry (DT_DEBUG, 0))
|
| 1247 |
|
|
return FALSE;
|
| 1248 |
|
|
}
|
| 1249 |
|
|
|
| 1250 |
|
|
if (plt)
|
| 1251 |
|
|
{
|
| 1252 |
|
|
if (!add_dynamic_entry (DT_PLTGOT, 0)
|
| 1253 |
|
|
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
|
| 1254 |
|
|
|| !add_dynamic_entry (DT_PLTREL, DT_RELA)
|
| 1255 |
|
|
|| !add_dynamic_entry (DT_JMPREL, 0))
|
| 1256 |
|
|
return FALSE;
|
| 1257 |
|
|
}
|
| 1258 |
|
|
|
| 1259 |
|
|
if (relocs)
|
| 1260 |
|
|
{
|
| 1261 |
|
|
if (!add_dynamic_entry (DT_RELA, 0)
|
| 1262 |
|
|
|| !add_dynamic_entry (DT_RELASZ, 0)
|
| 1263 |
|
|
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
|
| 1264 |
|
|
return FALSE;
|
| 1265 |
|
|
}
|
| 1266 |
|
|
|
| 1267 |
|
|
if (reltext || (info->flags & DF_TEXTREL) != 0)
|
| 1268 |
|
|
{
|
| 1269 |
|
|
if (!add_dynamic_entry (DT_TEXTREL, 0))
|
| 1270 |
|
|
return FALSE;
|
| 1271 |
|
|
}
|
| 1272 |
|
|
}
|
| 1273 |
|
|
#undef add_dynamic_entry
|
| 1274 |
|
|
|
| 1275 |
|
|
return TRUE;
|
| 1276 |
|
|
}
|
| 1277 |
|
|
|
| 1278 |
|
|
/* This function is called via elf_vax_link_hash_traverse if we are
|
| 1279 |
|
|
creating a shared object with -Bsymbolic. It discards the space
|
| 1280 |
|
|
allocated to copy PC relative relocs against symbols which are defined
|
| 1281 |
|
|
in regular objects. We allocated space for them in the check_relocs
|
| 1282 |
|
|
routine, but we won't fill them in in the relocate_section routine. */
|
| 1283 |
|
|
|
| 1284 |
|
|
static bfd_boolean
|
| 1285 |
|
|
elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
|
| 1286 |
|
|
PTR ignore ATTRIBUTE_UNUSED)
|
| 1287 |
|
|
{
|
| 1288 |
|
|
struct elf_vax_pcrel_relocs_copied *s;
|
| 1289 |
|
|
|
| 1290 |
|
|
if (h->root.root.type == bfd_link_hash_warning)
|
| 1291 |
|
|
h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link;
|
| 1292 |
|
|
|
| 1293 |
|
|
/* We only discard relocs for symbols defined in a regular object. */
|
| 1294 |
|
|
if (!h->root.def_regular)
|
| 1295 |
|
|
return TRUE;
|
| 1296 |
|
|
|
| 1297 |
|
|
for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
|
| 1298 |
|
|
s->section->size -= s->count * sizeof (Elf32_External_Rela);
|
| 1299 |
|
|
|
| 1300 |
|
|
return TRUE;
|
| 1301 |
|
|
}
|
| 1302 |
|
|
|
| 1303 |
|
|
/* This function is called via elf_link_hash_traverse. It looks for entries
|
| 1304 |
|
|
that have GOT or PLT (.GOT) references. If creating a static object or a
|
| 1305 |
|
|
shared object with -Bsymbolic, it resets the reference count back to 0
|
| 1306 |
|
|
and sets the offset to -1 so normal PC32 relocation will be done. If
|
| 1307 |
|
|
creating a shared object or executable, space in the .got and .rela.got
|
| 1308 |
|
|
will be reserved for the symbol. */
|
| 1309 |
|
|
|
| 1310 |
|
|
static bfd_boolean
|
| 1311 |
|
|
elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, PTR infoptr)
|
| 1312 |
|
|
{
|
| 1313 |
|
|
struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
|
| 1314 |
|
|
bfd *dynobj;
|
| 1315 |
|
|
asection *sgot;
|
| 1316 |
|
|
asection *srelgot;
|
| 1317 |
|
|
|
| 1318 |
|
|
/* We don't care about non-GOT (and non-PLT) entries. */
|
| 1319 |
|
|
if (h->got.refcount <= 0 && h->plt.refcount <= 0)
|
| 1320 |
|
|
return TRUE;
|
| 1321 |
|
|
|
| 1322 |
|
|
dynobj = elf_hash_table (info)->dynobj;
|
| 1323 |
|
|
if (dynobj == NULL)
|
| 1324 |
|
|
return TRUE;
|
| 1325 |
|
|
|
| 1326 |
|
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
| 1327 |
|
|
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
| 1328 |
|
|
|
| 1329 |
|
|
if (!elf_hash_table (info)->dynamic_sections_created
|
| 1330 |
|
|
|| (info->shared && info->symbolic))
|
| 1331 |
|
|
{
|
| 1332 |
|
|
h->got.refcount = 0;
|
| 1333 |
|
|
h->got.offset = (bfd_vma) -1;
|
| 1334 |
|
|
h->plt.refcount = 0;
|
| 1335 |
|
|
h->plt.offset = (bfd_vma) -1;
|
| 1336 |
|
|
}
|
| 1337 |
|
|
else if (h->got.refcount > 0)
|
| 1338 |
|
|
{
|
| 1339 |
|
|
/* Make sure this symbol is output as a dynamic symbol. */
|
| 1340 |
|
|
if (h->dynindx == -1)
|
| 1341 |
|
|
{
|
| 1342 |
|
|
if (!bfd_elf_link_record_dynamic_symbol (info, h))
|
| 1343 |
|
|
return FALSE;
|
| 1344 |
|
|
}
|
| 1345 |
|
|
|
| 1346 |
|
|
/* Allocate space in the .got and .rela.got sections. */
|
| 1347 |
|
|
sgot->size += 4;
|
| 1348 |
|
|
srelgot->size += sizeof (Elf32_External_Rela);
|
| 1349 |
|
|
}
|
| 1350 |
|
|
|
| 1351 |
|
|
return TRUE;
|
| 1352 |
|
|
}
|
| 1353 |
|
|
|
| 1354 |
|
|
/* Relocate an VAX ELF section. */
|
| 1355 |
|
|
|
| 1356 |
|
|
static bfd_boolean
|
| 1357 |
|
|
elf_vax_relocate_section (bfd *output_bfd,
|
| 1358 |
|
|
struct bfd_link_info *info,
|
| 1359 |
|
|
bfd *input_bfd,
|
| 1360 |
|
|
asection *input_section,
|
| 1361 |
|
|
bfd_byte *contents,
|
| 1362 |
|
|
Elf_Internal_Rela *relocs,
|
| 1363 |
|
|
Elf_Internal_Sym *local_syms,
|
| 1364 |
|
|
asection **local_sections)
|
| 1365 |
|
|
{
|
| 1366 |
|
|
bfd *dynobj;
|
| 1367 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 1368 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
| 1369 |
|
|
bfd_vma *local_got_offsets;
|
| 1370 |
|
|
bfd_vma plt_index;
|
| 1371 |
|
|
bfd_vma got_offset;
|
| 1372 |
|
|
asection *sgot;
|
| 1373 |
|
|
asection *splt;
|
| 1374 |
|
|
asection *sgotplt;
|
| 1375 |
|
|
asection *sreloc;
|
| 1376 |
|
|
Elf_Internal_Rela *rel;
|
| 1377 |
|
|
Elf_Internal_Rela *relend;
|
| 1378 |
|
|
|
| 1379 |
|
|
dynobj = elf_hash_table (info)->dynobj;
|
| 1380 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 1381 |
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
| 1382 |
|
|
local_got_offsets = elf_local_got_offsets (input_bfd);
|
| 1383 |
|
|
|
| 1384 |
|
|
sgot = NULL;
|
| 1385 |
|
|
splt = NULL;
|
| 1386 |
|
|
sgotplt = NULL;
|
| 1387 |
|
|
sreloc = NULL;
|
| 1388 |
|
|
|
| 1389 |
|
|
rel = relocs;
|
| 1390 |
|
|
relend = relocs + input_section->reloc_count;
|
| 1391 |
|
|
for (; rel < relend; rel++)
|
| 1392 |
|
|
{
|
| 1393 |
|
|
int r_type;
|
| 1394 |
|
|
reloc_howto_type *howto;
|
| 1395 |
|
|
unsigned long r_symndx;
|
| 1396 |
|
|
struct elf_link_hash_entry *h;
|
| 1397 |
|
|
Elf_Internal_Sym *sym;
|
| 1398 |
|
|
asection *sec;
|
| 1399 |
|
|
bfd_vma relocation;
|
| 1400 |
|
|
bfd_reloc_status_type r;
|
| 1401 |
|
|
|
| 1402 |
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
| 1403 |
|
|
if (r_type < 0 || r_type >= (int) R_VAX_max)
|
| 1404 |
|
|
{
|
| 1405 |
|
|
bfd_set_error (bfd_error_bad_value);
|
| 1406 |
|
|
return FALSE;
|
| 1407 |
|
|
}
|
| 1408 |
|
|
howto = howto_table + r_type;
|
| 1409 |
|
|
|
| 1410 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 1411 |
|
|
h = NULL;
|
| 1412 |
|
|
sym = NULL;
|
| 1413 |
|
|
sec = NULL;
|
| 1414 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 1415 |
|
|
{
|
| 1416 |
|
|
sym = local_syms + r_symndx;
|
| 1417 |
|
|
sec = local_sections[r_symndx];
|
| 1418 |
|
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
| 1419 |
|
|
}
|
| 1420 |
|
|
else
|
| 1421 |
|
|
{
|
| 1422 |
|
|
bfd_boolean unresolved_reloc;
|
| 1423 |
|
|
bfd_boolean warned;
|
| 1424 |
|
|
|
| 1425 |
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
| 1426 |
|
|
r_symndx, symtab_hdr, sym_hashes,
|
| 1427 |
|
|
h, sec, relocation,
|
| 1428 |
|
|
unresolved_reloc, warned);
|
| 1429 |
|
|
|
| 1430 |
|
|
if ((h->root.type == bfd_link_hash_defined
|
| 1431 |
|
|
|| h->root.type == bfd_link_hash_defweak)
|
| 1432 |
|
|
&& ((r_type == R_VAX_PLT32
|
| 1433 |
|
|
&& h->plt.offset != (bfd_vma) -1
|
| 1434 |
|
|
&& elf_hash_table (info)->dynamic_sections_created)
|
| 1435 |
|
|
|| (r_type == R_VAX_GOT32
|
| 1436 |
|
|
&& strcmp (h->root.root.string,
|
| 1437 |
|
|
"_GLOBAL_OFFSET_TABLE_") != 0
|
| 1438 |
|
|
&& elf_hash_table (info)->dynamic_sections_created
|
| 1439 |
|
|
&& (! info->shared
|
| 1440 |
|
|
|| (! info->symbolic && h->dynindx != -1)
|
| 1441 |
|
|
|| !h->def_regular))
|
| 1442 |
|
|
|| (info->shared
|
| 1443 |
|
|
&& ((! info->symbolic && h->dynindx != -1)
|
| 1444 |
|
|
|| !h->def_regular)
|
| 1445 |
|
|
&& ((input_section->flags & SEC_ALLOC) != 0
|
| 1446 |
|
|
/* DWARF will emit R_VAX_32 relocations in its
|
| 1447 |
|
|
sections against symbols defined externally
|
| 1448 |
|
|
in shared libraries. We can't do anything
|
| 1449 |
|
|
with them here. */
|
| 1450 |
|
|
|
| 1451 |
|
|
|| ((input_section->flags & SEC_DEBUGGING) != 0
|
| 1452 |
|
|
&& h->def_dynamic))
|
| 1453 |
|
|
&& (r_type == R_VAX_8
|
| 1454 |
|
|
|| r_type == R_VAX_16
|
| 1455 |
|
|
|| r_type == R_VAX_32
|
| 1456 |
|
|
|| r_type == R_VAX_PC8
|
| 1457 |
|
|
|| r_type == R_VAX_PC16
|
| 1458 |
|
|
|| r_type == R_VAX_PC32))))
|
| 1459 |
|
|
/* In these cases, we don't need the relocation
|
| 1460 |
|
|
value. We check specially because in some
|
| 1461 |
|
|
obscure cases sec->output_section will be NULL. */
|
| 1462 |
|
|
relocation = 0;
|
| 1463 |
|
|
}
|
| 1464 |
|
|
|
| 1465 |
|
|
if (sec != NULL && elf_discarded_section (sec))
|
| 1466 |
|
|
{
|
| 1467 |
|
|
/* For relocs against symbols from removed linkonce sections,
|
| 1468 |
|
|
or sections discarded by a linker script, we just want the
|
| 1469 |
|
|
section contents zeroed. Avoid any special processing. */
|
| 1470 |
|
|
_bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
|
| 1471 |
|
|
rel->r_info = 0;
|
| 1472 |
|
|
rel->r_addend = 0;
|
| 1473 |
|
|
continue;
|
| 1474 |
|
|
}
|
| 1475 |
|
|
|
| 1476 |
|
|
if (info->relocatable)
|
| 1477 |
|
|
continue;
|
| 1478 |
|
|
|
| 1479 |
|
|
switch (r_type)
|
| 1480 |
|
|
{
|
| 1481 |
|
|
case R_VAX_GOT32:
|
| 1482 |
|
|
/* Relocation is to the address of the entry for this symbol
|
| 1483 |
|
|
in the global offset table. */
|
| 1484 |
|
|
if (h == NULL || h->got.offset == (bfd_vma) -1)
|
| 1485 |
|
|
break;
|
| 1486 |
|
|
|
| 1487 |
|
|
/* Relocation is the offset of the entry for this symbol in
|
| 1488 |
|
|
the global offset table. */
|
| 1489 |
|
|
|
| 1490 |
|
|
{
|
| 1491 |
|
|
bfd_vma off;
|
| 1492 |
|
|
|
| 1493 |
|
|
if (sgot == NULL)
|
| 1494 |
|
|
{
|
| 1495 |
|
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
| 1496 |
|
|
BFD_ASSERT (sgot != NULL);
|
| 1497 |
|
|
}
|
| 1498 |
|
|
|
| 1499 |
|
|
BFD_ASSERT (h != NULL);
|
| 1500 |
|
|
off = h->got.offset;
|
| 1501 |
|
|
BFD_ASSERT (off != (bfd_vma) -1);
|
| 1502 |
|
|
BFD_ASSERT (off < sgot->size);
|
| 1503 |
|
|
|
| 1504 |
|
|
if (info->shared
|
| 1505 |
|
|
&& h->dynindx == -1
|
| 1506 |
|
|
&& h->def_regular)
|
| 1507 |
|
|
{
|
| 1508 |
|
|
/* The symbol was forced to be local
|
| 1509 |
|
|
because of a version file.. We must initialize
|
| 1510 |
|
|
this entry in the global offset table. Since
|
| 1511 |
|
|
the offset must always be a multiple of 4, we
|
| 1512 |
|
|
use the least significant bit to record whether
|
| 1513 |
|
|
we have initialized it already.
|
| 1514 |
|
|
|
| 1515 |
|
|
When doing a dynamic link, we create a .rela.got
|
| 1516 |
|
|
relocation entry to initialize the value. This
|
| 1517 |
|
|
is done in the finish_dynamic_symbol routine. */
|
| 1518 |
|
|
if ((off & 1) != 0)
|
| 1519 |
|
|
off &= ~1;
|
| 1520 |
|
|
else
|
| 1521 |
|
|
{
|
| 1522 |
|
|
bfd_put_32 (output_bfd, relocation + rel->r_addend,
|
| 1523 |
|
|
sgot->contents + off);
|
| 1524 |
|
|
h->got.offset |= 1;
|
| 1525 |
|
|
}
|
| 1526 |
|
|
} else {
|
| 1527 |
|
|
bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
|
| 1528 |
|
|
}
|
| 1529 |
|
|
|
| 1530 |
|
|
relocation = sgot->output_offset + off;
|
| 1531 |
|
|
/* The GOT relocation uses the addend. */
|
| 1532 |
|
|
rel->r_addend = 0;
|
| 1533 |
|
|
|
| 1534 |
|
|
/* Change the reference to be indirect. */
|
| 1535 |
|
|
contents[rel->r_offset - 1] |= 0x10;
|
| 1536 |
|
|
relocation += sgot->output_section->vma;
|
| 1537 |
|
|
}
|
| 1538 |
|
|
break;
|
| 1539 |
|
|
|
| 1540 |
|
|
case R_VAX_PLT32:
|
| 1541 |
|
|
/* Relocation is to the entry for this symbol in the
|
| 1542 |
|
|
procedure linkage table. */
|
| 1543 |
|
|
|
| 1544 |
|
|
/* Resolve a PLTxx reloc against a local symbol directly,
|
| 1545 |
|
|
without using the procedure linkage table. */
|
| 1546 |
|
|
if (h == NULL)
|
| 1547 |
|
|
break;
|
| 1548 |
|
|
|
| 1549 |
|
|
if (h->plt.offset == (bfd_vma) -1
|
| 1550 |
|
|
|| !elf_hash_table (info)->dynamic_sections_created)
|
| 1551 |
|
|
{
|
| 1552 |
|
|
/* We didn't make a PLT entry for this symbol. This
|
| 1553 |
|
|
happens when statically linking PIC code, or when
|
| 1554 |
|
|
using -Bsymbolic. */
|
| 1555 |
|
|
break;
|
| 1556 |
|
|
}
|
| 1557 |
|
|
|
| 1558 |
|
|
if (splt == NULL)
|
| 1559 |
|
|
{
|
| 1560 |
|
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
| 1561 |
|
|
BFD_ASSERT (splt != NULL);
|
| 1562 |
|
|
}
|
| 1563 |
|
|
|
| 1564 |
|
|
if (sgotplt == NULL)
|
| 1565 |
|
|
{
|
| 1566 |
|
|
sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
|
| 1567 |
|
|
BFD_ASSERT (splt != NULL);
|
| 1568 |
|
|
}
|
| 1569 |
|
|
|
| 1570 |
|
|
plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
|
| 1571 |
|
|
|
| 1572 |
|
|
/* Get the offset into the .got table of the entry that
|
| 1573 |
|
|
corresponds to this function. Each .got entry is 4 bytes.
|
| 1574 |
|
|
The first two are reserved. */
|
| 1575 |
|
|
got_offset = (plt_index + 3) * 4;
|
| 1576 |
|
|
|
| 1577 |
|
|
/* We want the relocate to point into the .got.plt instead
|
| 1578 |
|
|
of the plt itself. */
|
| 1579 |
|
|
relocation = (sgotplt->output_section->vma
|
| 1580 |
|
|
+ sgotplt->output_offset
|
| 1581 |
|
|
+ got_offset);
|
| 1582 |
|
|
contents[rel->r_offset-1] |= 0x10; /* make indirect */
|
| 1583 |
|
|
if (rel->r_addend == 2)
|
| 1584 |
|
|
{
|
| 1585 |
|
|
h->plt.offset |= 1;
|
| 1586 |
|
|
}
|
| 1587 |
|
|
else if (rel->r_addend != 0)
|
| 1588 |
|
|
(*_bfd_error_handler)
|
| 1589 |
|
|
(_("%s: warning: PLT addend of %d to `%s' from %s section ignored"),
|
| 1590 |
|
|
bfd_get_filename (input_bfd), rel->r_addend,
|
| 1591 |
|
|
h->root.root.string,
|
| 1592 |
|
|
bfd_get_section_name (input_bfd, input_section));
|
| 1593 |
|
|
rel->r_addend = 0;
|
| 1594 |
|
|
|
| 1595 |
|
|
break;
|
| 1596 |
|
|
|
| 1597 |
|
|
case R_VAX_PC8:
|
| 1598 |
|
|
case R_VAX_PC16:
|
| 1599 |
|
|
case R_VAX_PC32:
|
| 1600 |
|
|
if (h == NULL)
|
| 1601 |
|
|
break;
|
| 1602 |
|
|
/* Fall through. */
|
| 1603 |
|
|
case R_VAX_8:
|
| 1604 |
|
|
case R_VAX_16:
|
| 1605 |
|
|
case R_VAX_32:
|
| 1606 |
|
|
if (info->shared
|
| 1607 |
|
|
&& r_symndx != 0
|
| 1608 |
|
|
&& (input_section->flags & SEC_ALLOC) != 0
|
| 1609 |
|
|
&& ((r_type != R_VAX_PC8
|
| 1610 |
|
|
&& r_type != R_VAX_PC16
|
| 1611 |
|
|
&& r_type != R_VAX_PC32)
|
| 1612 |
|
|
|| ((input_section->flags & SEC_CODE)
|
| 1613 |
|
|
&& (!info->symbolic
|
| 1614 |
|
|
|| (!h->def_regular && h->type != STT_SECTION)))))
|
| 1615 |
|
|
{
|
| 1616 |
|
|
Elf_Internal_Rela outrel;
|
| 1617 |
|
|
bfd_byte *loc;
|
| 1618 |
|
|
bfd_boolean skip, relocate;
|
| 1619 |
|
|
|
| 1620 |
|
|
/* When generating a shared object, these relocations
|
| 1621 |
|
|
are copied into the output file to be resolved at run
|
| 1622 |
|
|
time. */
|
| 1623 |
|
|
if (sreloc == NULL)
|
| 1624 |
|
|
{
|
| 1625 |
|
|
const char *name;
|
| 1626 |
|
|
|
| 1627 |
|
|
name = (bfd_elf_string_from_elf_section
|
| 1628 |
|
|
(input_bfd,
|
| 1629 |
|
|
elf_elfheader (input_bfd)->e_shstrndx,
|
| 1630 |
|
|
elf_section_data (input_section)->rel_hdr.sh_name));
|
| 1631 |
|
|
if (name == NULL)
|
| 1632 |
|
|
return FALSE;
|
| 1633 |
|
|
|
| 1634 |
|
|
BFD_ASSERT (CONST_STRNEQ (name, ".rela")
|
| 1635 |
|
|
&& strcmp (bfd_get_section_name (input_bfd,
|
| 1636 |
|
|
input_section),
|
| 1637 |
|
|
name + 5) == 0);
|
| 1638 |
|
|
|
| 1639 |
|
|
sreloc = bfd_get_section_by_name (dynobj, name);
|
| 1640 |
|
|
BFD_ASSERT (sreloc != NULL);
|
| 1641 |
|
|
}
|
| 1642 |
|
|
|
| 1643 |
|
|
skip = FALSE;
|
| 1644 |
|
|
relocate = FALSE;
|
| 1645 |
|
|
|
| 1646 |
|
|
outrel.r_offset =
|
| 1647 |
|
|
_bfd_elf_section_offset (output_bfd, info, input_section,
|
| 1648 |
|
|
rel->r_offset);
|
| 1649 |
|
|
if (outrel.r_offset == (bfd_vma) -1)
|
| 1650 |
|
|
skip = TRUE;
|
| 1651 |
|
|
if (outrel.r_offset == (bfd_vma) -2)
|
| 1652 |
|
|
skip = TRUE, relocate = TRUE;
|
| 1653 |
|
|
outrel.r_offset += (input_section->output_section->vma
|
| 1654 |
|
|
+ input_section->output_offset);
|
| 1655 |
|
|
|
| 1656 |
|
|
if (skip)
|
| 1657 |
|
|
memset (&outrel, 0, sizeof outrel);
|
| 1658 |
|
|
/* h->dynindx may be -1 if the symbol was marked to
|
| 1659 |
|
|
become local. */
|
| 1660 |
|
|
else if (h != NULL
|
| 1661 |
|
|
&& ((! info->symbolic && h->dynindx != -1)
|
| 1662 |
|
|
|| !h->def_regular))
|
| 1663 |
|
|
{
|
| 1664 |
|
|
BFD_ASSERT (h->dynindx != -1);
|
| 1665 |
|
|
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
|
| 1666 |
|
|
outrel.r_addend = relocation + rel->r_addend;
|
| 1667 |
|
|
}
|
| 1668 |
|
|
else
|
| 1669 |
|
|
{
|
| 1670 |
|
|
if (r_type == R_VAX_32)
|
| 1671 |
|
|
{
|
| 1672 |
|
|
relocate = TRUE;
|
| 1673 |
|
|
outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
|
| 1674 |
|
|
BFD_ASSERT (bfd_get_signed_32 (input_bfd,
|
| 1675 |
|
|
&contents[rel->r_offset]) == 0);
|
| 1676 |
|
|
outrel.r_addend = relocation + rel->r_addend;
|
| 1677 |
|
|
}
|
| 1678 |
|
|
else
|
| 1679 |
|
|
{
|
| 1680 |
|
|
long indx;
|
| 1681 |
|
|
|
| 1682 |
|
|
if (bfd_is_abs_section (sec))
|
| 1683 |
|
|
indx = 0;
|
| 1684 |
|
|
else if (sec == NULL || sec->owner == NULL)
|
| 1685 |
|
|
{
|
| 1686 |
|
|
bfd_set_error (bfd_error_bad_value);
|
| 1687 |
|
|
return FALSE;
|
| 1688 |
|
|
}
|
| 1689 |
|
|
else
|
| 1690 |
|
|
{
|
| 1691 |
|
|
asection *osec;
|
| 1692 |
|
|
|
| 1693 |
|
|
/* We are turning this relocation into one
|
| 1694 |
|
|
against a section symbol. It would be
|
| 1695 |
|
|
proper to subtract the symbol's value,
|
| 1696 |
|
|
osec->vma, from the emitted reloc addend,
|
| 1697 |
|
|
but ld.so expects buggy relocs. */
|
| 1698 |
|
|
osec = sec->output_section;
|
| 1699 |
|
|
indx = elf_section_data (osec)->dynindx;
|
| 1700 |
|
|
if (indx == 0)
|
| 1701 |
|
|
{
|
| 1702 |
|
|
struct elf_link_hash_table *htab;
|
| 1703 |
|
|
htab = elf_hash_table (info);
|
| 1704 |
|
|
osec = htab->text_index_section;
|
| 1705 |
|
|
indx = elf_section_data (osec)->dynindx;
|
| 1706 |
|
|
}
|
| 1707 |
|
|
BFD_ASSERT (indx != 0);
|
| 1708 |
|
|
}
|
| 1709 |
|
|
|
| 1710 |
|
|
outrel.r_info = ELF32_R_INFO (indx, r_type);
|
| 1711 |
|
|
outrel.r_addend = relocation + rel->r_addend;
|
| 1712 |
|
|
}
|
| 1713 |
|
|
}
|
| 1714 |
|
|
|
| 1715 |
|
|
if (!strcmp (bfd_get_section_name (input_bfd, input_section),
|
| 1716 |
|
|
".text") != 0 ||
|
| 1717 |
|
|
(info->shared
|
| 1718 |
|
|
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_32
|
| 1719 |
|
|
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE
|
| 1720 |
|
|
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY
|
| 1721 |
|
|
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT
|
| 1722 |
|
|
&& ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT))
|
| 1723 |
|
|
{
|
| 1724 |
|
|
if (h != NULL)
|
| 1725 |
|
|
(*_bfd_error_handler)
|
| 1726 |
|
|
(_("%s: warning: %s relocation against symbol `%s' from %s section"),
|
| 1727 |
|
|
bfd_get_filename (input_bfd), howto->name,
|
| 1728 |
|
|
h->root.root.string,
|
| 1729 |
|
|
bfd_get_section_name (input_bfd, input_section));
|
| 1730 |
|
|
else
|
| 1731 |
|
|
(*_bfd_error_handler)
|
| 1732 |
|
|
(_("%s: warning: %s relocation to 0x%x from %s section"),
|
| 1733 |
|
|
bfd_get_filename (input_bfd), howto->name,
|
| 1734 |
|
|
outrel.r_addend,
|
| 1735 |
|
|
bfd_get_section_name (input_bfd, input_section));
|
| 1736 |
|
|
}
|
| 1737 |
|
|
loc = sreloc->contents;
|
| 1738 |
|
|
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
|
| 1739 |
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
| 1740 |
|
|
|
| 1741 |
|
|
/* This reloc will be computed at runtime, so there's no
|
| 1742 |
|
|
need to do anything now, except for R_VAX_32
|
| 1743 |
|
|
relocations that have been turned into
|
| 1744 |
|
|
R_VAX_RELATIVE. */
|
| 1745 |
|
|
if (!relocate)
|
| 1746 |
|
|
continue;
|
| 1747 |
|
|
}
|
| 1748 |
|
|
|
| 1749 |
|
|
break;
|
| 1750 |
|
|
|
| 1751 |
|
|
case R_VAX_GNU_VTINHERIT:
|
| 1752 |
|
|
case R_VAX_GNU_VTENTRY:
|
| 1753 |
|
|
/* These are no-ops in the end. */
|
| 1754 |
|
|
continue;
|
| 1755 |
|
|
|
| 1756 |
|
|
default:
|
| 1757 |
|
|
break;
|
| 1758 |
|
|
}
|
| 1759 |
|
|
|
| 1760 |
|
|
/* VAX PCREL relocations are from the end of relocation, not the start.
|
| 1761 |
|
|
So subtract the difference from the relocation amount since we can't
|
| 1762 |
|
|
add it to the offset. */
|
| 1763 |
|
|
if (howto->pc_relative && howto->pcrel_offset)
|
| 1764 |
|
|
relocation -= bfd_get_reloc_size(howto);
|
| 1765 |
|
|
|
| 1766 |
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
| 1767 |
|
|
contents, rel->r_offset,
|
| 1768 |
|
|
relocation, rel->r_addend);
|
| 1769 |
|
|
|
| 1770 |
|
|
if (r != bfd_reloc_ok)
|
| 1771 |
|
|
{
|
| 1772 |
|
|
switch (r)
|
| 1773 |
|
|
{
|
| 1774 |
|
|
default:
|
| 1775 |
|
|
case bfd_reloc_outofrange:
|
| 1776 |
|
|
abort ();
|
| 1777 |
|
|
case bfd_reloc_overflow:
|
| 1778 |
|
|
{
|
| 1779 |
|
|
const char *name;
|
| 1780 |
|
|
|
| 1781 |
|
|
if (h != NULL)
|
| 1782 |
|
|
name = NULL;
|
| 1783 |
|
|
else
|
| 1784 |
|
|
{
|
| 1785 |
|
|
name = bfd_elf_string_from_elf_section (input_bfd,
|
| 1786 |
|
|
symtab_hdr->sh_link,
|
| 1787 |
|
|
sym->st_name);
|
| 1788 |
|
|
if (name == NULL)
|
| 1789 |
|
|
return FALSE;
|
| 1790 |
|
|
if (*name == '\0')
|
| 1791 |
|
|
name = bfd_section_name (input_bfd, sec);
|
| 1792 |
|
|
}
|
| 1793 |
|
|
if (!(info->callbacks->reloc_overflow
|
| 1794 |
|
|
(info, (h ? &h->root : NULL), name, howto->name,
|
| 1795 |
|
|
(bfd_vma) 0, input_bfd, input_section,
|
| 1796 |
|
|
rel->r_offset)))
|
| 1797 |
|
|
return FALSE;
|
| 1798 |
|
|
}
|
| 1799 |
|
|
break;
|
| 1800 |
|
|
}
|
| 1801 |
|
|
}
|
| 1802 |
|
|
}
|
| 1803 |
|
|
|
| 1804 |
|
|
return TRUE;
|
| 1805 |
|
|
}
|
| 1806 |
|
|
|
| 1807 |
|
|
/* Finish up dynamic symbol handling. We set the contents of various
|
| 1808 |
|
|
dynamic sections here. */
|
| 1809 |
|
|
|
| 1810 |
|
|
static bfd_boolean
|
| 1811 |
|
|
elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
|
| 1812 |
|
|
struct elf_link_hash_entry *h,
|
| 1813 |
|
|
Elf_Internal_Sym *sym)
|
| 1814 |
|
|
{
|
| 1815 |
|
|
bfd *dynobj;
|
| 1816 |
|
|
|
| 1817 |
|
|
dynobj = elf_hash_table (info)->dynobj;
|
| 1818 |
|
|
|
| 1819 |
|
|
if (h->plt.offset != (bfd_vma) -1)
|
| 1820 |
|
|
{
|
| 1821 |
|
|
asection *splt;
|
| 1822 |
|
|
asection *sgot;
|
| 1823 |
|
|
asection *srela;
|
| 1824 |
|
|
bfd_vma plt_index;
|
| 1825 |
|
|
bfd_vma got_offset;
|
| 1826 |
|
|
bfd_vma addend;
|
| 1827 |
|
|
Elf_Internal_Rela rela;
|
| 1828 |
|
|
bfd_byte *loc;
|
| 1829 |
|
|
|
| 1830 |
|
|
/* This symbol has an entry in the procedure linkage table. Set
|
| 1831 |
|
|
it up. */
|
| 1832 |
|
|
BFD_ASSERT (h->dynindx != -1);
|
| 1833 |
|
|
|
| 1834 |
|
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
| 1835 |
|
|
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
| 1836 |
|
|
srela = bfd_get_section_by_name (dynobj, ".rela.plt");
|
| 1837 |
|
|
BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
|
| 1838 |
|
|
|
| 1839 |
|
|
addend = 2 * (h->plt.offset & 1);
|
| 1840 |
|
|
h->plt.offset &= ~1;
|
| 1841 |
|
|
|
| 1842 |
|
|
/* Get the index in the procedure linkage table which
|
| 1843 |
|
|
corresponds to this symbol. This is the index of this symbol
|
| 1844 |
|
|
in all the symbols for which we are making plt entries. The
|
| 1845 |
|
|
first entry in the procedure linkage table is reserved. */
|
| 1846 |
|
|
plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
|
| 1847 |
|
|
|
| 1848 |
|
|
/* Get the offset into the .got table of the entry that
|
| 1849 |
|
|
corresponds to this function. Each .got entry is 4 bytes.
|
| 1850 |
|
|
The first two are reserved. */
|
| 1851 |
|
|
got_offset = (plt_index + 3) * 4;
|
| 1852 |
|
|
|
| 1853 |
|
|
/* Fill in the entry in the procedure linkage table. */
|
| 1854 |
|
|
memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
|
| 1855 |
|
|
PLT_ENTRY_SIZE);
|
| 1856 |
|
|
|
| 1857 |
|
|
/* The offset is relative to the first extension word. */
|
| 1858 |
|
|
bfd_put_32 (output_bfd,
|
| 1859 |
|
|
-(h->plt.offset + 8),
|
| 1860 |
|
|
splt->contents + h->plt.offset + 4);
|
| 1861 |
|
|
|
| 1862 |
|
|
bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
|
| 1863 |
|
|
splt->contents + h->plt.offset + 8);
|
| 1864 |
|
|
|
| 1865 |
|
|
/* Fill in the entry in the global offset table. */
|
| 1866 |
|
|
bfd_put_32 (output_bfd,
|
| 1867 |
|
|
(splt->output_section->vma
|
| 1868 |
|
|
+ splt->output_offset
|
| 1869 |
|
|
+ h->plt.offset) + addend,
|
| 1870 |
|
|
sgot->contents + got_offset);
|
| 1871 |
|
|
|
| 1872 |
|
|
/* Fill in the entry in the .rela.plt section. */
|
| 1873 |
|
|
rela.r_offset = (sgot->output_section->vma
|
| 1874 |
|
|
+ sgot->output_offset
|
| 1875 |
|
|
+ got_offset);
|
| 1876 |
|
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
|
| 1877 |
|
|
rela.r_addend = addend;
|
| 1878 |
|
|
loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
|
| 1879 |
|
|
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
| 1880 |
|
|
|
| 1881 |
|
|
if (!h->def_regular)
|
| 1882 |
|
|
{
|
| 1883 |
|
|
/* Mark the symbol as undefined, rather than as defined in
|
| 1884 |
|
|
the .plt section. Leave the value alone. */
|
| 1885 |
|
|
sym->st_shndx = SHN_UNDEF;
|
| 1886 |
|
|
}
|
| 1887 |
|
|
}
|
| 1888 |
|
|
|
| 1889 |
|
|
if (h->got.offset != (bfd_vma) -1)
|
| 1890 |
|
|
{
|
| 1891 |
|
|
asection *sgot;
|
| 1892 |
|
|
asection *srela;
|
| 1893 |
|
|
Elf_Internal_Rela rela;
|
| 1894 |
|
|
bfd_byte *loc;
|
| 1895 |
|
|
|
| 1896 |
|
|
/* This symbol has an entry in the global offset table. Set it
|
| 1897 |
|
|
up. */
|
| 1898 |
|
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
| 1899 |
|
|
srela = bfd_get_section_by_name (dynobj, ".rela.got");
|
| 1900 |
|
|
BFD_ASSERT (sgot != NULL && srela != NULL);
|
| 1901 |
|
|
|
| 1902 |
|
|
rela.r_offset = (sgot->output_section->vma
|
| 1903 |
|
|
+ sgot->output_offset
|
| 1904 |
|
|
+ (h->got.offset &~ 1));
|
| 1905 |
|
|
|
| 1906 |
|
|
/* If the symbol was forced to be local because of a version file
|
| 1907 |
|
|
locally we just want to emit a RELATIVE reloc. The entry in
|
| 1908 |
|
|
the global offset table will already have been initialized in
|
| 1909 |
|
|
the relocate_section function. */
|
| 1910 |
|
|
if (info->shared
|
| 1911 |
|
|
&& h->dynindx == -1
|
| 1912 |
|
|
&& h->def_regular)
|
| 1913 |
|
|
{
|
| 1914 |
|
|
rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
|
| 1915 |
|
|
}
|
| 1916 |
|
|
else
|
| 1917 |
|
|
{
|
| 1918 |
|
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
|
| 1919 |
|
|
}
|
| 1920 |
|
|
rela.r_addend = bfd_get_signed_32 (output_bfd,
|
| 1921 |
|
|
(sgot->contents
|
| 1922 |
|
|
+ (h->got.offset & ~1)));
|
| 1923 |
|
|
|
| 1924 |
|
|
loc = srela->contents;
|
| 1925 |
|
|
loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
|
| 1926 |
|
|
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
| 1927 |
|
|
}
|
| 1928 |
|
|
|
| 1929 |
|
|
if (h->needs_copy)
|
| 1930 |
|
|
{
|
| 1931 |
|
|
asection *s;
|
| 1932 |
|
|
Elf_Internal_Rela rela;
|
| 1933 |
|
|
bfd_byte *loc;
|
| 1934 |
|
|
|
| 1935 |
|
|
/* This symbol needs a copy reloc. Set it up. */
|
| 1936 |
|
|
BFD_ASSERT (h->dynindx != -1
|
| 1937 |
|
|
&& (h->root.type == bfd_link_hash_defined
|
| 1938 |
|
|
|| h->root.type == bfd_link_hash_defweak));
|
| 1939 |
|
|
|
| 1940 |
|
|
s = bfd_get_section_by_name (h->root.u.def.section->owner,
|
| 1941 |
|
|
".rela.bss");
|
| 1942 |
|
|
BFD_ASSERT (s != NULL);
|
| 1943 |
|
|
|
| 1944 |
|
|
rela.r_offset = (h->root.u.def.value
|
| 1945 |
|
|
+ h->root.u.def.section->output_section->vma
|
| 1946 |
|
|
+ h->root.u.def.section->output_offset);
|
| 1947 |
|
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
|
| 1948 |
|
|
rela.r_addend = 0;
|
| 1949 |
|
|
loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
|
| 1950 |
|
|
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
| 1951 |
|
|
}
|
| 1952 |
|
|
|
| 1953 |
|
|
/* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
|
| 1954 |
|
|
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|
| 1955 |
|
|
|| h == elf_hash_table (info)->hgot)
|
| 1956 |
|
|
sym->st_shndx = SHN_ABS;
|
| 1957 |
|
|
|
| 1958 |
|
|
return TRUE;
|
| 1959 |
|
|
}
|
| 1960 |
|
|
|
| 1961 |
|
|
/* Finish up the dynamic sections. */
|
| 1962 |
|
|
|
| 1963 |
|
|
static bfd_boolean
|
| 1964 |
|
|
elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
|
| 1965 |
|
|
{
|
| 1966 |
|
|
bfd *dynobj;
|
| 1967 |
|
|
asection *sgot;
|
| 1968 |
|
|
asection *sdyn;
|
| 1969 |
|
|
|
| 1970 |
|
|
dynobj = elf_hash_table (info)->dynobj;
|
| 1971 |
|
|
|
| 1972 |
|
|
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
| 1973 |
|
|
BFD_ASSERT (sgot != NULL);
|
| 1974 |
|
|
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
| 1975 |
|
|
|
| 1976 |
|
|
if (elf_hash_table (info)->dynamic_sections_created)
|
| 1977 |
|
|
{
|
| 1978 |
|
|
asection *splt;
|
| 1979 |
|
|
Elf32_External_Dyn *dyncon, *dynconend;
|
| 1980 |
|
|
|
| 1981 |
|
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
| 1982 |
|
|
BFD_ASSERT (splt != NULL && sdyn != NULL);
|
| 1983 |
|
|
|
| 1984 |
|
|
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
| 1985 |
|
|
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
|
| 1986 |
|
|
for (; dyncon < dynconend; dyncon++)
|
| 1987 |
|
|
{
|
| 1988 |
|
|
Elf_Internal_Dyn dyn;
|
| 1989 |
|
|
const char *name;
|
| 1990 |
|
|
asection *s;
|
| 1991 |
|
|
|
| 1992 |
|
|
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
| 1993 |
|
|
|
| 1994 |
|
|
switch (dyn.d_tag)
|
| 1995 |
|
|
{
|
| 1996 |
|
|
default:
|
| 1997 |
|
|
break;
|
| 1998 |
|
|
|
| 1999 |
|
|
case DT_PLTGOT:
|
| 2000 |
|
|
name = ".got";
|
| 2001 |
|
|
goto get_vma;
|
| 2002 |
|
|
case DT_JMPREL:
|
| 2003 |
|
|
name = ".rela.plt";
|
| 2004 |
|
|
get_vma:
|
| 2005 |
|
|
s = bfd_get_section_by_name (output_bfd, name);
|
| 2006 |
|
|
BFD_ASSERT (s != NULL);
|
| 2007 |
|
|
dyn.d_un.d_ptr = s->vma;
|
| 2008 |
|
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
| 2009 |
|
|
break;
|
| 2010 |
|
|
|
| 2011 |
|
|
case DT_PLTRELSZ:
|
| 2012 |
|
|
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
|
| 2013 |
|
|
BFD_ASSERT (s != NULL);
|
| 2014 |
|
|
dyn.d_un.d_val = s->size;
|
| 2015 |
|
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
| 2016 |
|
|
break;
|
| 2017 |
|
|
|
| 2018 |
|
|
case DT_RELASZ:
|
| 2019 |
|
|
/* The procedure linkage table relocs (DT_JMPREL) should
|
| 2020 |
|
|
not be included in the overall relocs (DT_RELA).
|
| 2021 |
|
|
Therefore, we override the DT_RELASZ entry here to
|
| 2022 |
|
|
make it not include the JMPREL relocs. Since the
|
| 2023 |
|
|
linker script arranges for .rela.plt to follow all
|
| 2024 |
|
|
other relocation sections, we don't have to worry
|
| 2025 |
|
|
about changing the DT_RELA entry. */
|
| 2026 |
|
|
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
|
| 2027 |
|
|
if (s != NULL)
|
| 2028 |
|
|
dyn.d_un.d_val -= s->size;
|
| 2029 |
|
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
| 2030 |
|
|
break;
|
| 2031 |
|
|
}
|
| 2032 |
|
|
}
|
| 2033 |
|
|
|
| 2034 |
|
|
/* Fill in the first entry in the procedure linkage table. */
|
| 2035 |
|
|
if (splt->size > 0)
|
| 2036 |
|
|
{
|
| 2037 |
|
|
memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
|
| 2038 |
|
|
bfd_put_32 (output_bfd,
|
| 2039 |
|
|
(sgot->output_section->vma
|
| 2040 |
|
|
+ sgot->output_offset + 4
|
| 2041 |
|
|
- (splt->output_section->vma + 6)),
|
| 2042 |
|
|
splt->contents + 2);
|
| 2043 |
|
|
bfd_put_32 (output_bfd,
|
| 2044 |
|
|
(sgot->output_section->vma
|
| 2045 |
|
|
+ sgot->output_offset + 8
|
| 2046 |
|
|
- (splt->output_section->vma + 12)),
|
| 2047 |
|
|
splt->contents + 8);
|
| 2048 |
|
|
elf_section_data (splt->output_section)->this_hdr.sh_entsize
|
| 2049 |
|
|
= PLT_ENTRY_SIZE;
|
| 2050 |
|
|
}
|
| 2051 |
|
|
}
|
| 2052 |
|
|
|
| 2053 |
|
|
/* Fill in the first three entries in the global offset table. */
|
| 2054 |
|
|
if (sgot->size > 0)
|
| 2055 |
|
|
{
|
| 2056 |
|
|
if (sdyn == NULL)
|
| 2057 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
|
| 2058 |
|
|
else
|
| 2059 |
|
|
bfd_put_32 (output_bfd,
|
| 2060 |
|
|
sdyn->output_section->vma + sdyn->output_offset,
|
| 2061 |
|
|
sgot->contents);
|
| 2062 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
|
| 2063 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
|
| 2064 |
|
|
}
|
| 2065 |
|
|
|
| 2066 |
|
|
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
|
| 2067 |
|
|
|
| 2068 |
|
|
return TRUE;
|
| 2069 |
|
|
}
|
| 2070 |
|
|
|
| 2071 |
|
|
#define TARGET_LITTLE_SYM bfd_elf32_vax_vec
|
| 2072 |
|
|
#define TARGET_LITTLE_NAME "elf32-vax"
|
| 2073 |
|
|
#define ELF_MACHINE_CODE EM_VAX
|
| 2074 |
|
|
#define ELF_MAXPAGESIZE 0x1000
|
| 2075 |
|
|
|
| 2076 |
|
|
#define elf_backend_create_dynamic_sections \
|
| 2077 |
|
|
_bfd_elf_create_dynamic_sections
|
| 2078 |
|
|
#define bfd_elf32_bfd_link_hash_table_create \
|
| 2079 |
|
|
elf_vax_link_hash_table_create
|
| 2080 |
|
|
#define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
|
| 2081 |
|
|
|
| 2082 |
|
|
#define elf_backend_check_relocs elf_vax_check_relocs
|
| 2083 |
|
|
#define elf_backend_adjust_dynamic_symbol \
|
| 2084 |
|
|
elf_vax_adjust_dynamic_symbol
|
| 2085 |
|
|
#define elf_backend_size_dynamic_sections \
|
| 2086 |
|
|
elf_vax_size_dynamic_sections
|
| 2087 |
|
|
#define elf_backend_init_index_section _bfd_elf_init_1_index_section
|
| 2088 |
|
|
#define elf_backend_relocate_section elf_vax_relocate_section
|
| 2089 |
|
|
#define elf_backend_finish_dynamic_symbol \
|
| 2090 |
|
|
elf_vax_finish_dynamic_symbol
|
| 2091 |
|
|
#define elf_backend_finish_dynamic_sections \
|
| 2092 |
|
|
elf_vax_finish_dynamic_sections
|
| 2093 |
|
|
#define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
|
| 2094 |
|
|
#define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook
|
| 2095 |
|
|
#define bfd_elf32_bfd_merge_private_bfd_data \
|
| 2096 |
|
|
elf32_vax_merge_private_bfd_data
|
| 2097 |
|
|
#define bfd_elf32_bfd_set_private_flags \
|
| 2098 |
|
|
elf32_vax_set_private_flags
|
| 2099 |
|
|
#define bfd_elf32_bfd_print_private_bfd_data \
|
| 2100 |
|
|
elf32_vax_print_private_bfd_data
|
| 2101 |
|
|
|
| 2102 |
|
|
#define elf_backend_can_gc_sections 1
|
| 2103 |
|
|
#define elf_backend_want_got_plt 1
|
| 2104 |
|
|
#define elf_backend_plt_readonly 1
|
| 2105 |
|
|
#define elf_backend_want_plt_sym 0
|
| 2106 |
|
|
#define elf_backend_got_header_size 16
|
| 2107 |
|
|
#define elf_backend_rela_normal 1
|
| 2108 |
|
|
|
| 2109 |
|
|
#include "elf32-target.h"
|
