/* IBM S/390-specific support for 32-bit ELF
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/* IBM S/390-specific support for 32-bit ELF
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Copyright 2000, 2001 Free Software Foundation, Inc.
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Copyright 2000, 2001 Free Software Foundation, Inc.
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Contributed by Carl B. Pedersen and Martin Schwidefsky.
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Contributed by Carl B. Pedersen and Martin Schwidefsky.
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This file is part of BFD, the Binary File Descriptor library.
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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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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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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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(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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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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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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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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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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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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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02111-1307, USA. */
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#include "bfd.h"
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#include "bfd.h"
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#include "sysdep.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf-bfd.h"
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static reloc_howto_type *elf_s390_reloc_type_lookup
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static reloc_howto_type *elf_s390_reloc_type_lookup
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PARAMS ((bfd *, bfd_reloc_code_real_type));
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PARAMS ((bfd *, bfd_reloc_code_real_type));
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static void elf_s390_info_to_howto
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static void elf_s390_info_to_howto
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PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
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PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
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static boolean elf_s390_is_local_label_name PARAMS ((bfd *, const char *));
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static boolean elf_s390_is_local_label_name PARAMS ((bfd *, const char *));
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static struct bfd_hash_entry *elf_s390_link_hash_newfunc
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static struct bfd_hash_entry *elf_s390_link_hash_newfunc
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PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
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PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
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static struct bfd_link_hash_table *elf_s390_link_hash_table_create
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static struct bfd_link_hash_table *elf_s390_link_hash_table_create
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PARAMS ((bfd *));
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PARAMS ((bfd *));
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static boolean elf_s390_check_relocs
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static boolean elf_s390_check_relocs
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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const Elf_Internal_Rela *));
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static boolean elf_s390_adjust_dynamic_symbol
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static boolean elf_s390_adjust_dynamic_symbol
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PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
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PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
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static boolean elf_s390_size_dynamic_sections
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static boolean elf_s390_size_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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PARAMS ((bfd *, struct bfd_link_info *));
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static boolean elf_s390_relocate_section
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static boolean elf_s390_relocate_section
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
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static boolean elf_s390_finish_dynamic_symbol
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static boolean elf_s390_finish_dynamic_symbol
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PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
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PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
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Elf_Internal_Sym *));
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Elf_Internal_Sym *));
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static boolean elf_s390_finish_dynamic_sections
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static boolean elf_s390_finish_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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PARAMS ((bfd *, struct bfd_link_info *));
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#define USE_RELA 1 /* We want RELA relocations, not REL. */
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#define USE_RELA 1 /* We want RELA relocations, not REL. */
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#include "elf/s390.h"
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#include "elf/s390.h"
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/* The relocation "howto" table. */
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/* The relocation "howto" table. */
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static reloc_howto_type elf_howto_table[] =
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static reloc_howto_type elf_howto_table[] =
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{
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{
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HOWTO (R_390_NONE, /* type */
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HOWTO (R_390_NONE, /* type */
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0, /* rightshift */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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0, /* bitsize */
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false, /* pc_relative */
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false, /* pc_relative */
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0, /* bitpos */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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bfd_elf_generic_reloc, /* special_function */
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"R_390_NONE", /* name */
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"R_390_NONE", /* name */
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false, /* partial_inplace */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* src_mask */
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0, /* dst_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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false), /* pcrel_offset */
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HOWTO(R_390_8, 0, 0, 8, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_8", false, 0,0x000000ff, false),
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HOWTO(R_390_8, 0, 0, 8, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_8", false, 0,0x000000ff, false),
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HOWTO(R_390_12, 0, 1, 12, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_12", false, 0,0x00000fff, false),
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HOWTO(R_390_12, 0, 1, 12, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_12", false, 0,0x00000fff, false),
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HOWTO(R_390_16, 0, 1, 16, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_16", false, 0,0x0000ffff, false),
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HOWTO(R_390_16, 0, 1, 16, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_16", false, 0,0x0000ffff, false),
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HOWTO(R_390_32, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_32", false, 0,0xffffffff, false),
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HOWTO(R_390_32, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_32", false, 0,0xffffffff, false),
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HOWTO(R_390_PC32, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC32", false, 0,0xffffffff, true),
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HOWTO(R_390_PC32, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC32", false, 0,0xffffffff, true),
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HOWTO(R_390_GOT12, 0, 1, 12, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_GOT12", false, 0,0x00000fff, false),
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HOWTO(R_390_GOT12, 0, 1, 12, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_GOT12", false, 0,0x00000fff, false),
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HOWTO(R_390_GOT32, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT32", false, 0,0xffffffff, false),
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HOWTO(R_390_GOT32, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT32", false, 0,0xffffffff, false),
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HOWTO(R_390_PLT32, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT32", false, 0,0xffffffff, true),
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HOWTO(R_390_PLT32, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT32", false, 0,0xffffffff, true),
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HOWTO(R_390_COPY, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_COPY", false, 0,0xffffffff, false),
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HOWTO(R_390_COPY, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_COPY", false, 0,0xffffffff, false),
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HOWTO(R_390_GLOB_DAT, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GLOB_DAT",false, 0,0xffffffff, false),
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HOWTO(R_390_GLOB_DAT, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GLOB_DAT",false, 0,0xffffffff, false),
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HOWTO(R_390_JMP_SLOT, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_JMP_SLOT",false, 0,0xffffffff, false),
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HOWTO(R_390_JMP_SLOT, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_JMP_SLOT",false, 0,0xffffffff, false),
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HOWTO(R_390_RELATIVE, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_RELATIVE",false, 0,0xffffffff, false),
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HOWTO(R_390_RELATIVE, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_RELATIVE",false, 0,0xffffffff, false),
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HOWTO(R_390_GOTOFF, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTOFF", false, 0,0xffffffff, false),
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HOWTO(R_390_GOTOFF, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTOFF", false, 0,0xffffffff, false),
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HOWTO(R_390_GOTPC, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPC", false, 0,0xffffffff, true),
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HOWTO(R_390_GOTPC, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPC", false, 0,0xffffffff, true),
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HOWTO(R_390_GOT16, 0, 1, 16, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT16", false, 0,0x0000ffff, false),
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HOWTO(R_390_GOT16, 0, 1, 16, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT16", false, 0,0x0000ffff, false),
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HOWTO(R_390_PC16, 0, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC16", false, 0,0x0000ffff, true),
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HOWTO(R_390_PC16, 0, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC16", false, 0,0x0000ffff, true),
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HOWTO(R_390_PC16DBL, 1, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC16DBL", false, 0,0x0000ffff, true),
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HOWTO(R_390_PC16DBL, 1, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC16DBL", false, 0,0x0000ffff, true),
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HOWTO(R_390_PLT16DBL, 1, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT16DBL", false, 0,0x0000ffff, true),
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HOWTO(R_390_PLT16DBL, 1, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT16DBL", false, 0,0x0000ffff, true),
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};
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};
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/* GNU extension to record C++ vtable hierarchy. */
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/* GNU extension to record C++ vtable hierarchy. */
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static reloc_howto_type elf32_s390_vtinherit_howto =
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static reloc_howto_type elf32_s390_vtinherit_howto =
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HOWTO (R_390_GNU_VTINHERIT, 0,2,0,false,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", false,0, 0, false);
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HOWTO (R_390_GNU_VTINHERIT, 0,2,0,false,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", false,0, 0, false);
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static reloc_howto_type elf32_s390_vtentry_howto =
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static reloc_howto_type elf32_s390_vtentry_howto =
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HOWTO (R_390_GNU_VTENTRY, 0,2,0,false,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", false,0,0, false);
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HOWTO (R_390_GNU_VTENTRY, 0,2,0,false,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", false,0,0, false);
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static reloc_howto_type *
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static reloc_howto_type *
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elf_s390_reloc_type_lookup (abfd, code)
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elf_s390_reloc_type_lookup (abfd, code)
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bfd *abfd ATTRIBUTE_UNUSED;
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bfd *abfd ATTRIBUTE_UNUSED;
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bfd_reloc_code_real_type code;
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bfd_reloc_code_real_type code;
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{
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{
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switch (code) {
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switch (code) {
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case BFD_RELOC_NONE:
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case BFD_RELOC_NONE:
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return &elf_howto_table[(int) R_390_NONE];
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return &elf_howto_table[(int) R_390_NONE];
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case BFD_RELOC_8:
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case BFD_RELOC_8:
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return &elf_howto_table[(int) R_390_8];
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return &elf_howto_table[(int) R_390_8];
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case BFD_RELOC_390_12:
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case BFD_RELOC_390_12:
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return &elf_howto_table[(int) R_390_12];
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return &elf_howto_table[(int) R_390_12];
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case BFD_RELOC_16:
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case BFD_RELOC_16:
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return &elf_howto_table[(int) R_390_16];
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return &elf_howto_table[(int) R_390_16];
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case BFD_RELOC_32:
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case BFD_RELOC_32:
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return &elf_howto_table[(int) R_390_32];
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return &elf_howto_table[(int) R_390_32];
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case BFD_RELOC_CTOR:
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case BFD_RELOC_CTOR:
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return &elf_howto_table[(int) R_390_32];
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return &elf_howto_table[(int) R_390_32];
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case BFD_RELOC_32_PCREL:
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case BFD_RELOC_32_PCREL:
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return &elf_howto_table[(int) R_390_PC32];
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return &elf_howto_table[(int) R_390_PC32];
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case BFD_RELOC_390_GOT12:
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case BFD_RELOC_390_GOT12:
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return &elf_howto_table[(int) R_390_GOT12];
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return &elf_howto_table[(int) R_390_GOT12];
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case BFD_RELOC_32_GOT_PCREL:
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case BFD_RELOC_32_GOT_PCREL:
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return &elf_howto_table[(int) R_390_GOT32];
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return &elf_howto_table[(int) R_390_GOT32];
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case BFD_RELOC_390_PLT32:
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case BFD_RELOC_390_PLT32:
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return &elf_howto_table[(int) R_390_PLT32];
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return &elf_howto_table[(int) R_390_PLT32];
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case BFD_RELOC_390_COPY:
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case BFD_RELOC_390_COPY:
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return &elf_howto_table[(int) R_390_COPY];
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return &elf_howto_table[(int) R_390_COPY];
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case BFD_RELOC_390_GLOB_DAT:
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case BFD_RELOC_390_GLOB_DAT:
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return &elf_howto_table[(int) R_390_GLOB_DAT];
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return &elf_howto_table[(int) R_390_GLOB_DAT];
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case BFD_RELOC_390_JMP_SLOT:
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case BFD_RELOC_390_JMP_SLOT:
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return &elf_howto_table[(int) R_390_JMP_SLOT];
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return &elf_howto_table[(int) R_390_JMP_SLOT];
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case BFD_RELOC_390_RELATIVE:
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case BFD_RELOC_390_RELATIVE:
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return &elf_howto_table[(int) R_390_RELATIVE];
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return &elf_howto_table[(int) R_390_RELATIVE];
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case BFD_RELOC_32_GOTOFF:
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case BFD_RELOC_32_GOTOFF:
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return &elf_howto_table[(int) R_390_GOTOFF];
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return &elf_howto_table[(int) R_390_GOTOFF];
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case BFD_RELOC_390_GOTPC:
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case BFD_RELOC_390_GOTPC:
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return &elf_howto_table[(int) R_390_GOTPC];
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return &elf_howto_table[(int) R_390_GOTPC];
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case BFD_RELOC_390_GOT16:
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case BFD_RELOC_390_GOT16:
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return &elf_howto_table[(int) R_390_GOT16];
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return &elf_howto_table[(int) R_390_GOT16];
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case BFD_RELOC_16_PCREL:
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case BFD_RELOC_16_PCREL:
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return &elf_howto_table[(int) R_390_PC16];
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return &elf_howto_table[(int) R_390_PC16];
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case BFD_RELOC_390_PC16DBL:
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case BFD_RELOC_390_PC16DBL:
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return &elf_howto_table[(int) R_390_PC16DBL];
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return &elf_howto_table[(int) R_390_PC16DBL];
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case BFD_RELOC_390_PLT16DBL:
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case BFD_RELOC_390_PLT16DBL:
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return &elf_howto_table[(int) R_390_PLT16DBL];
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return &elf_howto_table[(int) R_390_PLT16DBL];
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case BFD_RELOC_VTABLE_INHERIT:
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case BFD_RELOC_VTABLE_INHERIT:
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return &elf32_s390_vtinherit_howto;
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return &elf32_s390_vtinherit_howto;
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case BFD_RELOC_VTABLE_ENTRY:
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case BFD_RELOC_VTABLE_ENTRY:
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return &elf32_s390_vtentry_howto;
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return &elf32_s390_vtentry_howto;
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default:
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default:
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break;
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break;
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}
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}
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return 0;
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return 0;
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}
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}
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/* We need to use ELF32_R_TYPE so we have our own copy of this function,
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/* We need to use ELF32_R_TYPE so we have our own copy of this function,
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and elf32-s390.c has its own copy. */
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and elf32-s390.c has its own copy. */
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static void
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static void
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elf_s390_info_to_howto (abfd, cache_ptr, dst)
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elf_s390_info_to_howto (abfd, cache_ptr, dst)
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bfd *abfd ATTRIBUTE_UNUSED;
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bfd *abfd ATTRIBUTE_UNUSED;
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arelent *cache_ptr;
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arelent *cache_ptr;
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Elf_Internal_Rela *dst;
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Elf_Internal_Rela *dst;
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{
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{
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switch (ELF32_R_TYPE(dst->r_info))
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switch (ELF32_R_TYPE(dst->r_info))
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{
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{
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case R_390_GNU_VTINHERIT:
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case R_390_GNU_VTINHERIT:
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cache_ptr->howto = &elf32_s390_vtinherit_howto;
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cache_ptr->howto = &elf32_s390_vtinherit_howto;
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break;
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break;
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case R_390_GNU_VTENTRY:
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case R_390_GNU_VTENTRY:
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cache_ptr->howto = &elf32_s390_vtentry_howto;
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cache_ptr->howto = &elf32_s390_vtentry_howto;
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break;
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break;
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default:
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default:
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BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
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BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
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cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
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cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
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}
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}
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}
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}
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static boolean
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static boolean
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elf_s390_is_local_label_name (abfd, name)
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elf_s390_is_local_label_name (abfd, name)
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bfd *abfd;
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bfd *abfd;
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const char *name;
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const char *name;
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{
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{
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if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
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if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
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return true;
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return true;
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return _bfd_elf_is_local_label_name (abfd, name);
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return _bfd_elf_is_local_label_name (abfd, name);
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}
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}
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/* Functions for the 390 ELF linker. */
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/* Functions for the 390 ELF linker. */
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/* The name of the dynamic interpreter. This is put in the .interp
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/* The name of the dynamic interpreter. This is put in the .interp
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section. */
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section. */
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#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
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#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
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/* The nop opcode we use. */
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/* The nop opcode we use. */
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#define s390_NOP 0x07070707
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#define s390_NOP 0x07070707
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/* The size in bytes of the first entry in the procedure linkage table. */
|
/* The size in bytes of the first entry in the procedure linkage table. */
|
#define PLT_FIRST_ENTRY_SIZE 32
|
#define PLT_FIRST_ENTRY_SIZE 32
|
/* The size in bytes of an entry in the procedure linkage table. */
|
/* The size in bytes of an entry in the procedure linkage table. */
|
#define PLT_ENTRY_SIZE 32
|
#define PLT_ENTRY_SIZE 32
|
|
|
#define GOT_ENTRY_SIZE 4
|
#define GOT_ENTRY_SIZE 4
|
|
|
/* The first three entries in a procedure linkage table are reserved,
|
/* The first three entries in a procedure linkage table are reserved,
|
and the initial contents are unimportant (we zero them out).
|
and the initial contents are unimportant (we zero them out).
|
Subsequent entries look like this. See the SVR4 ABI 386
|
Subsequent entries look like this. See the SVR4 ABI 386
|
supplement to see how this works. */
|
supplement to see how this works. */
|
|
|
/* For the s390, simple addr offset can only be 0 - 4096.
|
/* For the s390, simple addr offset can only be 0 - 4096.
|
To use the full 2 GB address space, several instructions
|
To use the full 2 GB address space, several instructions
|
are needed to load an address in a register and execute
|
are needed to load an address in a register and execute
|
a branch( or just saving the address)
|
a branch( or just saving the address)
|
|
|
Furthermore, only r 0 and 1 are free to use!!! */
|
Furthermore, only r 0 and 1 are free to use!!! */
|
|
|
/* The first 3 words in the GOT are then reserved.
|
/* The first 3 words in the GOT are then reserved.
|
Word 0 is the address of the dynamic table.
|
Word 0 is the address of the dynamic table.
|
Word 1 is a pointer to a structure describing the object
|
Word 1 is a pointer to a structure describing the object
|
Word 2 is used to point to the loader entry address.
|
Word 2 is used to point to the loader entry address.
|
|
|
The code for position independand PLT entries looks like this:
|
The code for position independand PLT entries looks like this:
|
|
|
r12 holds addr of the current GOT at entry to the PLT
|
r12 holds addr of the current GOT at entry to the PLT
|
|
|
The GOT holds the address in the PLT to be executed.
|
The GOT holds the address in the PLT to be executed.
|
The loader then gets:
|
The loader then gets:
|
24(15) = Pointer to the structure describing the object.
|
24(15) = Pointer to the structure describing the object.
|
28(15) = Offset in symbol table
|
28(15) = Offset in symbol table
|
|
|
The loader must then find the module where the function is
|
The loader must then find the module where the function is
|
and insert the address in the GOT.
|
and insert the address in the GOT.
|
|
|
Note: 390 can only address +- 64 K relative.
|
Note: 390 can only address +- 64 K relative.
|
We check if offset > 65536, then make a relative branch -64xxx
|
We check if offset > 65536, then make a relative branch -64xxx
|
back to a previous defined branch
|
back to a previous defined branch
|
|
|
PLT1: BASR 1,0 # 2 bytes
|
PLT1: BASR 1,0 # 2 bytes
|
L 1,22(1) # 4 bytes Load offset in GOT in r 1
|
L 1,22(1) # 4 bytes Load offset in GOT in r 1
|
L 1,(1,12) # 4 bytes Load address from GOT in r1
|
L 1,(1,12) # 4 bytes Load address from GOT in r1
|
BCR 15,1 # 2 bytes Jump to address
|
BCR 15,1 # 2 bytes Jump to address
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
L 1,14(1) # 4 bytes Load offset in symol table in r1
|
L 1,14(1) # 4 bytes Load offset in symol table in r1
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
.word 0 # 2 bytes filler
|
.word 0 # 2 bytes filler
|
.long ? # 4 bytes offset in GOT
|
.long ? # 4 bytes offset in GOT
|
.long ? # 4 bytes offset into symbol table
|
.long ? # 4 bytes offset into symbol table
|
|
|
This was the general case. There are two additional, optimizes PLT
|
This was the general case. There are two additional, optimizes PLT
|
definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
|
definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
|
First the one for GOT offsets < 4096:
|
First the one for GOT offsets < 4096:
|
|
|
PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
|
PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
|
BCR 15,1 # 2 bytes Jump to address
|
BCR 15,1 # 2 bytes Jump to address
|
.word 0,0,0 # 6 bytes filler
|
.word 0,0,0 # 6 bytes filler
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
L 1,14(1) # 4 bytes Load offset in symbol table in r1
|
L 1,14(1) # 4 bytes Load offset in symbol table in r1
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
.word 0,0,0 # 6 bytes filler
|
.word 0,0,0 # 6 bytes filler
|
.long ? # 4 bytes offset into symbol table
|
.long ? # 4 bytes offset into symbol table
|
|
|
Second the one for GOT offsets < 32768:
|
Second the one for GOT offsets < 32768:
|
|
|
PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
|
PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
|
L 1,(1,12) # 4 bytes Load address from GOT to r1
|
L 1,(1,12) # 4 bytes Load address from GOT to r1
|
BCR 15,1 # 2 bytes Jump to address
|
BCR 15,1 # 2 bytes Jump to address
|
.word 0 # 2 bytes filler
|
.word 0 # 2 bytes filler
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
L 1,14(1) # 4 bytes Load offset in symbol table in r1
|
L 1,14(1) # 4 bytes Load offset in symbol table in r1
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
.word 0,0,0 # 6 bytes filler
|
.word 0,0,0 # 6 bytes filler
|
.long ? # 4 bytes offset into symbol table
|
.long ? # 4 bytes offset into symbol table
|
|
|
Total = 32 bytes per PLT entry
|
Total = 32 bytes per PLT entry
|
|
|
The code for static build PLT entries looks like this:
|
The code for static build PLT entries looks like this:
|
|
|
PLT1: BASR 1,0 # 2 bytes
|
PLT1: BASR 1,0 # 2 bytes
|
L 1,22(1) # 4 bytes Load address of GOT entry
|
L 1,22(1) # 4 bytes Load address of GOT entry
|
L 1,0(0,1) # 4 bytes Load address from GOT in r1
|
L 1,0(0,1) # 4 bytes Load address from GOT in r1
|
BCR 15,1 # 2 bytes Jump to address
|
BCR 15,1 # 2 bytes Jump to address
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
L 1,14(1) # 4 bytes Load offset in symbol table in r1
|
L 1,14(1) # 4 bytes Load offset in symbol table in r1
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
.word 0 # 2 bytes filler
|
.word 0 # 2 bytes filler
|
.long ? # 4 bytes address of GOT entry
|
.long ? # 4 bytes address of GOT entry
|
.long ? # 4 bytes offset into symbol table */
|
.long ? # 4 bytes offset into symbol table */
|
|
|
#define PLT_PIC_ENTRY_WORD0 0x0d105810
|
#define PLT_PIC_ENTRY_WORD0 0x0d105810
|
#define PLT_PIC_ENTRY_WORD1 0x10165811
|
#define PLT_PIC_ENTRY_WORD1 0x10165811
|
#define PLT_PIC_ENTRY_WORD2 0xc00007f1
|
#define PLT_PIC_ENTRY_WORD2 0xc00007f1
|
#define PLT_PIC_ENTRY_WORD3 0x0d105810
|
#define PLT_PIC_ENTRY_WORD3 0x0d105810
|
#define PLT_PIC_ENTRY_WORD4 0x100ea7f4
|
#define PLT_PIC_ENTRY_WORD4 0x100ea7f4
|
|
|
#define PLT_PIC12_ENTRY_WORD0 0x5810c000
|
#define PLT_PIC12_ENTRY_WORD0 0x5810c000
|
#define PLT_PIC12_ENTRY_WORD1 0x07f10000
|
#define PLT_PIC12_ENTRY_WORD1 0x07f10000
|
#define PLT_PIC12_ENTRY_WORD2 0x00000000
|
#define PLT_PIC12_ENTRY_WORD2 0x00000000
|
#define PLT_PIC12_ENTRY_WORD3 0x0d105810
|
#define PLT_PIC12_ENTRY_WORD3 0x0d105810
|
#define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
|
#define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
|
|
|
#define PLT_PIC16_ENTRY_WORD0 0xa7180000
|
#define PLT_PIC16_ENTRY_WORD0 0xa7180000
|
#define PLT_PIC16_ENTRY_WORD1 0x5811c000
|
#define PLT_PIC16_ENTRY_WORD1 0x5811c000
|
#define PLT_PIC16_ENTRY_WORD2 0x07f10000
|
#define PLT_PIC16_ENTRY_WORD2 0x07f10000
|
#define PLT_PIC16_ENTRY_WORD3 0x0d105810
|
#define PLT_PIC16_ENTRY_WORD3 0x0d105810
|
#define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
|
#define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
|
|
|
#define PLT_ENTRY_WORD0 0x0d105810
|
#define PLT_ENTRY_WORD0 0x0d105810
|
#define PLT_ENTRY_WORD1 0x10165810
|
#define PLT_ENTRY_WORD1 0x10165810
|
#define PLT_ENTRY_WORD2 0x100007f1
|
#define PLT_ENTRY_WORD2 0x100007f1
|
#define PLT_ENTRY_WORD3 0x0d105810
|
#define PLT_ENTRY_WORD3 0x0d105810
|
#define PLT_ENTRY_WORD4 0x100ea7f4
|
#define PLT_ENTRY_WORD4 0x100ea7f4
|
|
|
/* The first PLT entry pushes the offset into the symbol table
|
/* The first PLT entry pushes the offset into the symbol table
|
from R1 onto the stack at 8(15) and the loader object info
|
from R1 onto the stack at 8(15) and the loader object info
|
at 12(15), loads the loader address in R1 and jumps to it. */
|
at 12(15), loads the loader address in R1 and jumps to it. */
|
|
|
/* The first entry in the PLT for PIC code:
|
/* The first entry in the PLT for PIC code:
|
|
|
PLT0:
|
PLT0:
|
ST 1,28(15) # R1 has offset into symbol table
|
ST 1,28(15) # R1 has offset into symbol table
|
L 1,4(12) # Get loader ino(object struct address)
|
L 1,4(12) # Get loader ino(object struct address)
|
ST 1,24(15) # Store address
|
ST 1,24(15) # Store address
|
L 1,8(12) # Entry address of loader in R1
|
L 1,8(12) # Entry address of loader in R1
|
BR 1 # Jump to loader
|
BR 1 # Jump to loader
|
|
|
The first entry in the PLT for static code:
|
The first entry in the PLT for static code:
|
|
|
PLT0:
|
PLT0:
|
ST 1,28(15) # R1 has offset into symbol table
|
ST 1,28(15) # R1 has offset into symbol table
|
BASR 1,0
|
BASR 1,0
|
L 1,18(0,1) # Get address of GOT
|
L 1,18(0,1) # Get address of GOT
|
MVC 24(4,15),4(1) # Move loader ino to stack
|
MVC 24(4,15),4(1) # Move loader ino to stack
|
L 1,8(1) # Get address of loader
|
L 1,8(1) # Get address of loader
|
BR 1 # Jump to loader
|
BR 1 # Jump to loader
|
.word 0 # filler
|
.word 0 # filler
|
.long got # address of GOT */
|
.long got # address of GOT */
|
|
|
#define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
|
#define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
|
#define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
|
#define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
|
#define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
|
#define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
|
#define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
|
#define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
|
#define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
|
#define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
|
|
|
#define PLT_FIRST_ENTRY_WORD0 0x5010f01c
|
#define PLT_FIRST_ENTRY_WORD0 0x5010f01c
|
#define PLT_FIRST_ENTRY_WORD1 0x0d105810
|
#define PLT_FIRST_ENTRY_WORD1 0x0d105810
|
#define PLT_FIRST_ENTRY_WORD2 0x1012D203
|
#define PLT_FIRST_ENTRY_WORD2 0x1012D203
|
#define PLT_FIRST_ENTRY_WORD3 0xf0181004
|
#define PLT_FIRST_ENTRY_WORD3 0xf0181004
|
#define PLT_FIRST_ENTRY_WORD4 0x58101008
|
#define PLT_FIRST_ENTRY_WORD4 0x58101008
|
#define PLT_FIRST_ENTRY_WORD5 0x07f10000
|
#define PLT_FIRST_ENTRY_WORD5 0x07f10000
|
|
|
/* The s390 linker needs to keep track of the number of relocs that it
|
/* The s390 linker needs to keep track of the number of relocs that it
|
decides to copy in check_relocs for each symbol. This is so that
|
decides to copy in check_relocs for each symbol. This is so that
|
it can discard PC relative relocs if it doesn't need them when
|
it can discard PC relative relocs if it doesn't need them when
|
linking with -Bsymbolic. We store the information in a field
|
linking with -Bsymbolic. We store the information in a field
|
extending the regular ELF linker hash table. */
|
extending the regular ELF linker hash table. */
|
|
|
/* This structure keeps track of the number of PC relative relocs we
|
/* This structure keeps track of the number of PC relative relocs we
|
have copied for a given symbol. */
|
have copied for a given symbol. */
|
|
|
struct elf_s390_pcrel_relocs_copied
|
struct elf_s390_pcrel_relocs_copied
|
{
|
{
|
/* Next section. */
|
/* Next section. */
|
struct elf_s390_pcrel_relocs_copied *next;
|
struct elf_s390_pcrel_relocs_copied *next;
|
/* A section in dynobj. */
|
/* A section in dynobj. */
|
asection *section;
|
asection *section;
|
/* Number of relocs copied in this section. */
|
/* Number of relocs copied in this section. */
|
bfd_size_type count;
|
bfd_size_type count;
|
};
|
};
|
|
|
/* s390 ELF linker hash entry. */
|
/* s390 ELF linker hash entry. */
|
|
|
struct elf_s390_link_hash_entry
|
struct elf_s390_link_hash_entry
|
{
|
{
|
struct elf_link_hash_entry root;
|
struct elf_link_hash_entry root;
|
|
|
/* Number of PC relative relocs copied for this symbol. */
|
/* Number of PC relative relocs copied for this symbol. */
|
struct elf_s390_pcrel_relocs_copied *pcrel_relocs_copied;
|
struct elf_s390_pcrel_relocs_copied *pcrel_relocs_copied;
|
};
|
};
|
|
|
/* s390 ELF linker hash table. */
|
/* s390 ELF linker hash table. */
|
|
|
struct elf_s390_link_hash_table
|
struct elf_s390_link_hash_table
|
{
|
{
|
struct elf_link_hash_table root;
|
struct elf_link_hash_table root;
|
};
|
};
|
|
|
/* Declare this now that the above structures are defined. */
|
/* Declare this now that the above structures are defined. */
|
|
|
static boolean elf_s390_discard_copies
|
static boolean elf_s390_discard_copies
|
PARAMS ((struct elf_s390_link_hash_entry *, PTR));
|
PARAMS ((struct elf_s390_link_hash_entry *, PTR));
|
|
|
/* Traverse an s390 ELF linker hash table. */
|
/* Traverse an s390 ELF linker hash table. */
|
|
|
#define elf_s390_link_hash_traverse(table, func, info) \
|
#define elf_s390_link_hash_traverse(table, func, info) \
|
(elf_link_hash_traverse \
|
(elf_link_hash_traverse \
|
(&(table)->root, \
|
(&(table)->root, \
|
(boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
|
(boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
|
(info)))
|
(info)))
|
|
|
/* Get the s390 ELF linker hash table from a link_info structure. */
|
/* Get the s390 ELF linker hash table from a link_info structure. */
|
|
|
#define elf_s390_hash_table(p) \
|
#define elf_s390_hash_table(p) \
|
((struct elf_s390_link_hash_table *) ((p)->hash))
|
((struct elf_s390_link_hash_table *) ((p)->hash))
|
|
|
/* Create an entry in an s390 ELF linker hash table. */
|
/* Create an entry in an s390 ELF linker hash table. */
|
|
|
static struct bfd_hash_entry *
|
static struct bfd_hash_entry *
|
elf_s390_link_hash_newfunc (entry, table, string)
|
elf_s390_link_hash_newfunc (entry, table, string)
|
struct bfd_hash_entry *entry;
|
struct bfd_hash_entry *entry;
|
struct bfd_hash_table *table;
|
struct bfd_hash_table *table;
|
const char *string;
|
const char *string;
|
{
|
{
|
struct elf_s390_link_hash_entry *ret =
|
struct elf_s390_link_hash_entry *ret =
|
(struct elf_s390_link_hash_entry *) entry;
|
(struct elf_s390_link_hash_entry *) entry;
|
|
|
/* Allocate the structure if it has not already been allocated by a
|
/* Allocate the structure if it has not already been allocated by a
|
subclass. */
|
subclass. */
|
if (ret == (struct elf_s390_link_hash_entry *) NULL)
|
if (ret == (struct elf_s390_link_hash_entry *) NULL)
|
ret = ((struct elf_s390_link_hash_entry *)
|
ret = ((struct elf_s390_link_hash_entry *)
|
bfd_hash_allocate (table,
|
bfd_hash_allocate (table,
|
sizeof (struct elf_s390_link_hash_entry)));
|
sizeof (struct elf_s390_link_hash_entry)));
|
if (ret == (struct elf_s390_link_hash_entry *) NULL)
|
if (ret == (struct elf_s390_link_hash_entry *) NULL)
|
return (struct bfd_hash_entry *) ret;
|
return (struct bfd_hash_entry *) ret;
|
|
|
/* Call the allocation method of the superclass. */
|
/* Call the allocation method of the superclass. */
|
ret = ((struct elf_s390_link_hash_entry *)
|
ret = ((struct elf_s390_link_hash_entry *)
|
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
table, string));
|
table, string));
|
if (ret != (struct elf_s390_link_hash_entry *) NULL)
|
if (ret != (struct elf_s390_link_hash_entry *) NULL)
|
{
|
{
|
ret->pcrel_relocs_copied = NULL;
|
ret->pcrel_relocs_copied = NULL;
|
}
|
}
|
|
|
return (struct bfd_hash_entry *) ret;
|
return (struct bfd_hash_entry *) ret;
|
}
|
}
|
|
|
/* Create an s390 ELF linker hash table. */
|
/* Create an s390 ELF linker hash table. */
|
|
|
static struct bfd_link_hash_table *
|
static struct bfd_link_hash_table *
|
elf_s390_link_hash_table_create (abfd)
|
elf_s390_link_hash_table_create (abfd)
|
bfd *abfd;
|
bfd *abfd;
|
{
|
{
|
struct elf_s390_link_hash_table *ret;
|
struct elf_s390_link_hash_table *ret;
|
|
|
ret = ((struct elf_s390_link_hash_table *)
|
ret = ((struct elf_s390_link_hash_table *)
|
bfd_alloc (abfd, sizeof (struct elf_s390_link_hash_table)));
|
bfd_alloc (abfd, sizeof (struct elf_s390_link_hash_table)));
|
if (ret == (struct elf_s390_link_hash_table *) NULL)
|
if (ret == (struct elf_s390_link_hash_table *) NULL)
|
return NULL;
|
return NULL;
|
|
|
if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
|
if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
|
elf_s390_link_hash_newfunc))
|
elf_s390_link_hash_newfunc))
|
{
|
{
|
bfd_release (abfd, ret);
|
bfd_release (abfd, ret);
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
return &ret->root.root;
|
return &ret->root.root;
|
}
|
}
|
|
|
|
|
/* Look through the relocs for a section during the first phase, and
|
/* Look through the relocs for a section during the first phase, and
|
allocate space in the global offset table or procedure linkage
|
allocate space in the global offset table or procedure linkage
|
table. */
|
table. */
|
|
|
static boolean
|
static boolean
|
elf_s390_check_relocs (abfd, info, sec, relocs)
|
elf_s390_check_relocs (abfd, info, sec, relocs)
|
bfd *abfd;
|
bfd *abfd;
|
struct bfd_link_info *info;
|
struct bfd_link_info *info;
|
asection *sec;
|
asection *sec;
|
const Elf_Internal_Rela *relocs;
|
const Elf_Internal_Rela *relocs;
|
{
|
{
|
bfd *dynobj;
|
bfd *dynobj;
|
Elf_Internal_Shdr *symtab_hdr;
|
Elf_Internal_Shdr *symtab_hdr;
|
struct elf_link_hash_entry **sym_hashes;
|
struct elf_link_hash_entry **sym_hashes;
|
bfd_signed_vma *local_got_refcounts;
|
bfd_signed_vma *local_got_refcounts;
|
const Elf_Internal_Rela *rel;
|
const Elf_Internal_Rela *rel;
|
const Elf_Internal_Rela *rel_end;
|
const Elf_Internal_Rela *rel_end;
|
asection *sgot;
|
asection *sgot;
|
asection *srelgot;
|
asection *srelgot;
|
asection *sreloc;
|
asection *sreloc;
|
|
|
if (info->relocateable)
|
if (info->relocateable)
|
return true;
|
return true;
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
dynobj = elf_hash_table (info)->dynobj;
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
sym_hashes = elf_sym_hashes (abfd);
|
sym_hashes = elf_sym_hashes (abfd);
|
local_got_refcounts = elf_local_got_offsets (abfd);
|
local_got_refcounts = elf_local_got_offsets (abfd);
|
|
|
sgot = NULL;
|
sgot = NULL;
|
srelgot = NULL;
|
srelgot = NULL;
|
sreloc = NULL;
|
sreloc = NULL;
|
|
|
rel_end = relocs + sec->reloc_count;
|
rel_end = relocs + sec->reloc_count;
|
for (rel = relocs; rel < rel_end; rel++)
|
for (rel = relocs; rel < rel_end; rel++)
|
{
|
{
|
unsigned long r_symndx;
|
unsigned long r_symndx;
|
struct elf_link_hash_entry *h;
|
struct elf_link_hash_entry *h;
|
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
if (r_symndx < symtab_hdr->sh_info)
|
h = NULL;
|
h = NULL;
|
else
|
else
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
|
/* Some relocs require a global offset table. */
|
/* Some relocs require a global offset table. */
|
if (dynobj == NULL)
|
if (dynobj == NULL)
|
{
|
{
|
switch (ELF32_R_TYPE (rel->r_info))
|
switch (ELF32_R_TYPE (rel->r_info))
|
{
|
{
|
case R_390_GOT12:
|
case R_390_GOT12:
|
case R_390_GOT16:
|
case R_390_GOT16:
|
case R_390_GOT32:
|
case R_390_GOT32:
|
case R_390_GOTOFF:
|
case R_390_GOTOFF:
|
case R_390_GOTPC:
|
case R_390_GOTPC:
|
elf_hash_table (info)->dynobj = dynobj = abfd;
|
elf_hash_table (info)->dynobj = dynobj = abfd;
|
if (! _bfd_elf_create_got_section (dynobj, info))
|
if (! _bfd_elf_create_got_section (dynobj, info))
|
return false;
|
return false;
|
break;
|
break;
|
|
|
default:
|
default:
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
switch (ELF32_R_TYPE (rel->r_info))
|
{
|
{
|
case R_390_GOT12:
|
case R_390_GOT12:
|
case R_390_GOT16:
|
case R_390_GOT16:
|
case R_390_GOT32:
|
case R_390_GOT32:
|
/* This symbol requires a global offset table entry. */
|
/* This symbol requires a global offset table entry. */
|
|
|
if (sgot == NULL)
|
if (sgot == NULL)
|
{
|
{
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
BFD_ASSERT (sgot != NULL);
|
BFD_ASSERT (sgot != NULL);
|
}
|
}
|
|
|
|
|
if (srelgot == NULL
|
if (srelgot == NULL
|
&& (h != NULL || info->shared))
|
&& (h != NULL || info->shared))
|
{
|
{
|
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
if (srelgot == NULL)
|
if (srelgot == NULL)
|
{
|
{
|
srelgot = bfd_make_section (dynobj, ".rela.got");
|
srelgot = bfd_make_section (dynobj, ".rela.got");
|
if (srelgot == NULL
|
if (srelgot == NULL
|
|| ! bfd_set_section_flags (dynobj, srelgot,
|
|| ! bfd_set_section_flags (dynobj, srelgot,
|
(SEC_ALLOC
|
(SEC_ALLOC
|
| SEC_LOAD
|
| SEC_LOAD
|
| SEC_HAS_CONTENTS
|
| SEC_HAS_CONTENTS
|
| SEC_IN_MEMORY
|
| SEC_IN_MEMORY
|
| SEC_LINKER_CREATED
|
| SEC_LINKER_CREATED
|
| SEC_READONLY))
|
| SEC_READONLY))
|
|| ! bfd_set_section_alignment (dynobj, srelgot, 2))
|
|| ! bfd_set_section_alignment (dynobj, srelgot, 2))
|
return false;
|
return false;
|
}
|
}
|
}
|
}
|
|
|
if (h != NULL)
|
if (h != NULL)
|
{
|
{
|
if (h->got.refcount == -1)
|
if (h->got.refcount == -1)
|
{
|
{
|
h->got.refcount = 1;
|
h->got.refcount = 1;
|
|
|
/* Make sure this symbol is output as a dynamic symbol. */
|
/* Make sure this symbol is output as a dynamic symbol. */
|
if (h->dynindx == -1)
|
if (h->dynindx == -1)
|
{
|
{
|
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
return false;
|
return false;
|
}
|
}
|
|
|
sgot->_raw_size += 4;
|
sgot->_raw_size += 4;
|
srelgot->_raw_size += sizeof (Elf32_External_Rela);
|
srelgot->_raw_size += sizeof (Elf32_External_Rela);
|
}
|
}
|
else
|
else
|
h->got.refcount += 1;
|
h->got.refcount += 1;
|
}
|
}
|
else
|
else
|
{
|
{
|
/* This is a global offset table entry for a local symbol. */
|
/* This is a global offset table entry for a local symbol. */
|
if (local_got_refcounts == NULL)
|
if (local_got_refcounts == NULL)
|
{
|
{
|
size_t size;
|
size_t size;
|
|
|
size = symtab_hdr->sh_info * sizeof (bfd_signed_vma);
|
size = symtab_hdr->sh_info * sizeof (bfd_signed_vma);
|
local_got_refcounts = (bfd_signed_vma *)
|
local_got_refcounts = (bfd_signed_vma *)
|
bfd_alloc (abfd, size);
|
bfd_alloc (abfd, size);
|
if (local_got_refcounts == NULL)
|
if (local_got_refcounts == NULL)
|
return false;
|
return false;
|
elf_local_got_refcounts (abfd) = local_got_refcounts;
|
elf_local_got_refcounts (abfd) = local_got_refcounts;
|
memset (local_got_refcounts, -1, size);
|
memset (local_got_refcounts, -1, size);
|
}
|
}
|
if (local_got_refcounts[r_symndx] == -1)
|
if (local_got_refcounts[r_symndx] == -1)
|
{
|
{
|
local_got_refcounts[r_symndx] = 1;
|
local_got_refcounts[r_symndx] = 1;
|
|
|
sgot->_raw_size += 4;
|
sgot->_raw_size += 4;
|
if (info->shared)
|
if (info->shared)
|
{
|
{
|
/* If we are generating a shared object, we need to
|
/* If we are generating a shared object, we need to
|
output a R_390_RELATIVE reloc so that the dynamic
|
output a R_390_RELATIVE reloc so that the dynamic
|
linker can adjust this GOT entry. */
|
linker can adjust this GOT entry. */
|
srelgot->_raw_size += sizeof (Elf32_External_Rela);
|
srelgot->_raw_size += sizeof (Elf32_External_Rela);
|
}
|
}
|
}
|
}
|
else
|
else
|
local_got_refcounts[r_symndx] += 1;
|
local_got_refcounts[r_symndx] += 1;
|
}
|
}
|
break;
|
break;
|
|
|
case R_390_PLT16DBL:
|
case R_390_PLT16DBL:
|
case R_390_PLT32:
|
case R_390_PLT32:
|
/* This symbol requires a procedure linkage table entry. We
|
/* This symbol requires a procedure linkage table entry. We
|
actually build the entry in adjust_dynamic_symbol,
|
actually build the entry in adjust_dynamic_symbol,
|
because this might be a case of linking PIC code which is
|
because this might be a case of linking PIC code which is
|
never referenced by a dynamic object, in which case we
|
never referenced by a dynamic object, in which case we
|
don't need to generate a procedure linkage table entry
|
don't need to generate a procedure linkage table entry
|
after all. */
|
after all. */
|
|
|
/* If this is a local symbol, we resolve it directly without
|
/* If this is a local symbol, we resolve it directly without
|
creating a procedure linkage table entry. */
|
creating a procedure linkage table entry. */
|
if (h == NULL)
|
if (h == NULL)
|
continue;
|
continue;
|
|
|
if (h->plt.refcount == -1)
|
if (h->plt.refcount == -1)
|
{
|
{
|
h->plt.refcount = 1;
|
h->plt.refcount = 1;
|
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
}
|
}
|
else
|
else
|
h->plt.refcount += 1;
|
h->plt.refcount += 1;
|
break;
|
break;
|
|
|
case R_390_8:
|
case R_390_8:
|
case R_390_16:
|
case R_390_16:
|
case R_390_32:
|
case R_390_32:
|
case R_390_PC16:
|
case R_390_PC16:
|
case R_390_PC16DBL:
|
case R_390_PC16DBL:
|
case R_390_PC32:
|
case R_390_PC32:
|
if (h != NULL)
|
if (h != NULL)
|
h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
|
h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
|
|
|
/* If we are creating a shared library, and this is a reloc
|
/* If we are creating a shared library, and this is a reloc
|
against a global symbol, or a non PC relative reloc
|
against a global symbol, or a non PC relative reloc
|
against a local symbol, then we need to copy the reloc
|
against a local symbol, then we need to copy the reloc
|
into the shared library. However, if we are linking with
|
into the shared library. However, if we are linking with
|
-Bsymbolic, we do not need to copy a reloc against a
|
-Bsymbolic, we do not need to copy a reloc against a
|
global symbol which is defined in an object we are
|
global symbol which is defined in an object we are
|
including in the link (i.e., DEF_REGULAR is set). At
|
including in the link (i.e., DEF_REGULAR is set). At
|
this point we have not seen all the input files, so it is
|
this point we have not seen all the input files, so it is
|
possible that DEF_REGULAR is not set now but will be set
|
possible that DEF_REGULAR is not set now but will be set
|
later (it is never cleared). We account for that
|
later (it is never cleared). We account for that
|
possibility below by storing information in the
|
possibility below by storing information in the
|
pcrel_relocs_copied field of the hash table entry. */
|
pcrel_relocs_copied field of the hash table entry. */
|
if (info->shared
|
if (info->shared
|
&& (sec->flags & SEC_ALLOC) != 0
|
&& (sec->flags & SEC_ALLOC) != 0
|
&& ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 &&
|
&& ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 &&
|
ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL &&
|
ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL &&
|
ELF32_R_TYPE (rel->r_info) != R_390_PC32)
|
ELF32_R_TYPE (rel->r_info) != R_390_PC32)
|
|| (h != NULL
|
|| (h != NULL
|
&& (! info->symbolic
|
&& (! info->symbolic
|
|| (h->elf_link_hash_flags
|
|| (h->elf_link_hash_flags
|
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|
{
|
{
|
/* When creating a shared object, we must copy these
|
/* When creating a shared object, we must copy these
|
reloc types into the output file. We create a reloc
|
reloc types into the output file. We create a reloc
|
section in dynobj and make room for this reloc. */
|
section in dynobj and make room for this reloc. */
|
if (sreloc == NULL)
|
if (sreloc == NULL)
|
{
|
{
|
const char *name;
|
const char *name;
|
|
|
name = (bfd_elf_string_from_elf_section
|
name = (bfd_elf_string_from_elf_section
|
(abfd,
|
(abfd,
|
elf_elfheader (abfd)->e_shstrndx,
|
elf_elfheader (abfd)->e_shstrndx,
|
elf_section_data (sec)->rel_hdr.sh_name));
|
elf_section_data (sec)->rel_hdr.sh_name));
|
if (name == NULL)
|
if (name == NULL)
|
return false;
|
return false;
|
|
|
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
|
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
|
&& strcmp (bfd_get_section_name (abfd, sec),
|
&& strcmp (bfd_get_section_name (abfd, sec),
|
name + 5) == 0);
|
name + 5) == 0);
|
|
|
sreloc = bfd_get_section_by_name (dynobj, name);
|
sreloc = bfd_get_section_by_name (dynobj, name);
|
if (sreloc == NULL)
|
if (sreloc == NULL)
|
{
|
{
|
flagword flags;
|
flagword flags;
|
|
|
sreloc = bfd_make_section (dynobj, name);
|
sreloc = bfd_make_section (dynobj, name);
|
flags = (SEC_HAS_CONTENTS | SEC_READONLY
|
flags = (SEC_HAS_CONTENTS | SEC_READONLY
|
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
if ((sec->flags & SEC_ALLOC) != 0)
|
if ((sec->flags & SEC_ALLOC) != 0)
|
flags |= SEC_ALLOC | SEC_LOAD;
|
flags |= SEC_ALLOC | SEC_LOAD;
|
if (sreloc == NULL
|
if (sreloc == NULL
|
|| ! bfd_set_section_flags (dynobj, sreloc, flags)
|
|| ! bfd_set_section_flags (dynobj, sreloc, flags)
|
|| ! bfd_set_section_alignment (dynobj, sreloc, 2))
|
|| ! bfd_set_section_alignment (dynobj, sreloc, 2))
|
return false;
|
return false;
|
}
|
}
|
}
|
}
|
|
|
sreloc->_raw_size += sizeof (Elf32_External_Rela);
|
sreloc->_raw_size += sizeof (Elf32_External_Rela);
|
|
|
/* If we are linking with -Bsymbolic, and this is a
|
/* If we are linking with -Bsymbolic, and this is a
|
global symbol, we count the number of PC relative
|
global symbol, we count the number of PC relative
|
relocations we have entered for this symbol, so that
|
relocations we have entered for this symbol, so that
|
we can discard them again if the symbol is later
|
we can discard them again if the symbol is later
|
defined by a regular object. Note that this function
|
defined by a regular object. Note that this function
|
is only called if we are using an elf_s390 linker
|
is only called if we are using an elf_s390 linker
|
hash table, which means that h is really a pointer to
|
hash table, which means that h is really a pointer to
|
an elf_s390_link_hash_entry. */
|
an elf_s390_link_hash_entry. */
|
if (h != NULL
|
if (h != NULL
|
&& (ELF32_R_TYPE (rel->r_info) == R_390_PC16 ||
|
&& (ELF32_R_TYPE (rel->r_info) == R_390_PC16 ||
|
ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL ||
|
ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL ||
|
ELF32_R_TYPE (rel->r_info) == R_390_PC32))
|
ELF32_R_TYPE (rel->r_info) == R_390_PC32))
|
{
|
{
|
struct elf_s390_link_hash_entry *eh;
|
struct elf_s390_link_hash_entry *eh;
|
struct elf_s390_pcrel_relocs_copied *p;
|
struct elf_s390_pcrel_relocs_copied *p;
|
|
|
eh = (struct elf_s390_link_hash_entry *) h;
|
eh = (struct elf_s390_link_hash_entry *) h;
|
|
|
for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
|
for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
|
if (p->section == sreloc)
|
if (p->section == sreloc)
|
break;
|
break;
|
|
|
if (p == NULL)
|
if (p == NULL)
|
{
|
{
|
p = ((struct elf_s390_pcrel_relocs_copied *)
|
p = ((struct elf_s390_pcrel_relocs_copied *)
|
bfd_alloc (dynobj, sizeof *p));
|
bfd_alloc (dynobj, sizeof *p));
|
if (p == NULL)
|
if (p == NULL)
|
return false;
|
return false;
|
p->next = eh->pcrel_relocs_copied;
|
p->next = eh->pcrel_relocs_copied;
|
eh->pcrel_relocs_copied = p;
|
eh->pcrel_relocs_copied = p;
|
p->section = sreloc;
|
p->section = sreloc;
|
p->count = 0;
|
p->count = 0;
|
}
|
}
|
|
|
++p->count;
|
++p->count;
|
}
|
}
|
}
|
}
|
|
|
break;
|
break;
|
|
|
/* This relocation describes the C++ object vtable hierarchy.
|
/* This relocation describes the C++ object vtable hierarchy.
|
Reconstruct it for later use during GC. */
|
Reconstruct it for later use during GC. */
|
case R_390_GNU_VTINHERIT:
|
case R_390_GNU_VTINHERIT:
|
if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
return false;
|
return false;
|
break;
|
break;
|
|
|
/* This relocation describes which C++ vtable entries are actually
|
/* This relocation describes which C++ vtable entries are actually
|
used. Record for later use during GC. */
|
used. Record for later use during GC. */
|
case R_390_GNU_VTENTRY:
|
case R_390_GNU_VTENTRY:
|
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
return false;
|
return false;
|
break;
|
break;
|
|
|
default:
|
default:
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
return true;
|
return true;
|
}
|
}
|
|
|
/* Return the section that should be marked against GC for a given
|
/* Return the section that should be marked against GC for a given
|
relocation. */
|
relocation. */
|
|
|
static asection *
|
static asection *
|
elf_s390_gc_mark_hook (abfd, info, rel, h, sym)
|
elf_s390_gc_mark_hook (abfd, info, rel, h, sym)
|
bfd *abfd;
|
bfd *abfd;
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
Elf_Internal_Rela *rel;
|
Elf_Internal_Rela *rel;
|
struct elf_link_hash_entry *h;
|
struct elf_link_hash_entry *h;
|
Elf_Internal_Sym *sym;
|
Elf_Internal_Sym *sym;
|
{
|
{
|
if (h != NULL)
|
if (h != NULL)
|
{
|
{
|
switch (ELF32_R_TYPE (rel->r_info))
|
switch (ELF32_R_TYPE (rel->r_info))
|
{
|
{
|
case R_390_GNU_VTINHERIT:
|
case R_390_GNU_VTINHERIT:
|
case R_390_GNU_VTENTRY:
|
case R_390_GNU_VTENTRY:
|
break;
|
break;
|
|
|
default:
|
default:
|
switch (h->root.type)
|
switch (h->root.type)
|
{
|
{
|
case bfd_link_hash_defined:
|
case bfd_link_hash_defined:
|
case bfd_link_hash_defweak:
|
case bfd_link_hash_defweak:
|
return h->root.u.def.section;
|
return h->root.u.def.section;
|
|
|
case bfd_link_hash_common:
|
case bfd_link_hash_common:
|
return h->root.u.c.p->section;
|
return h->root.u.c.p->section;
|
|
|
default:
|
default:
|
break;
|
break;
|
}
|
}
|
}
|
}
|
}
|
}
|
else
|
else
|
{
|
{
|
if (!(elf_bad_symtab (abfd)
|
if (!(elf_bad_symtab (abfd)
|
&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
|
&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
|
&& ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
|
&& ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
|
&& sym->st_shndx != SHN_COMMON))
|
&& sym->st_shndx != SHN_COMMON))
|
{
|
{
|
return bfd_section_from_elf_index (abfd, sym->st_shndx);
|
return bfd_section_from_elf_index (abfd, sym->st_shndx);
|
}
|
}
|
}
|
}
|
|
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
/* Update the got entry reference counts for the section being removed. */
|
/* Update the got entry reference counts for the section being removed. */
|
|
|
static boolean
|
static boolean
|
elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
|
elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
|
bfd *abfd ATTRIBUTE_UNUSED;
|
bfd *abfd ATTRIBUTE_UNUSED;
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
asection *sec ATTRIBUTE_UNUSED;
|
asection *sec ATTRIBUTE_UNUSED;
|
const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
|
const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
|
{
|
{
|
Elf_Internal_Shdr *symtab_hdr;
|
Elf_Internal_Shdr *symtab_hdr;
|
struct elf_link_hash_entry **sym_hashes;
|
struct elf_link_hash_entry **sym_hashes;
|
bfd_signed_vma *local_got_refcounts;
|
bfd_signed_vma *local_got_refcounts;
|
const Elf_Internal_Rela *rel, *relend;
|
const Elf_Internal_Rela *rel, *relend;
|
unsigned long r_symndx;
|
unsigned long r_symndx;
|
struct elf_link_hash_entry *h;
|
struct elf_link_hash_entry *h;
|
bfd *dynobj;
|
bfd *dynobj;
|
asection *sgot;
|
asection *sgot;
|
asection *srelgot;
|
asection *srelgot;
|
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
sym_hashes = elf_sym_hashes (abfd);
|
sym_hashes = elf_sym_hashes (abfd);
|
local_got_refcounts = elf_local_got_refcounts (abfd);
|
local_got_refcounts = elf_local_got_refcounts (abfd);
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
dynobj = elf_hash_table (info)->dynobj;
|
if (dynobj == NULL)
|
if (dynobj == NULL)
|
return true;
|
return true;
|
|
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
|
|
relend = relocs + sec->reloc_count;
|
relend = relocs + sec->reloc_count;
|
for (rel = relocs; rel < relend; rel++)
|
for (rel = relocs; rel < relend; rel++)
|
switch (ELF32_R_TYPE (rel->r_info))
|
switch (ELF32_R_TYPE (rel->r_info))
|
{
|
{
|
case R_390_GOT12:
|
case R_390_GOT12:
|
case R_390_GOT16:
|
case R_390_GOT16:
|
case R_390_GOT32:
|
case R_390_GOT32:
|
case R_390_GOTOFF:
|
case R_390_GOTOFF:
|
case R_390_GOTPC:
|
case R_390_GOTPC:
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
if (r_symndx >= symtab_hdr->sh_info)
|
if (r_symndx >= symtab_hdr->sh_info)
|
{
|
{
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
if (h->got.refcount > 0)
|
if (h->got.refcount > 0)
|
{
|
{
|
h->got.refcount -= 1;
|
h->got.refcount -= 1;
|
if (h->got.refcount == 0)
|
if (h->got.refcount == 0)
|
{
|
{
|
sgot->_raw_size -= 4;
|
sgot->_raw_size -= 4;
|
srelgot->_raw_size -= sizeof (Elf32_External_Rela);
|
srelgot->_raw_size -= sizeof (Elf32_External_Rela);
|
}
|
}
|
}
|
}
|
}
|
}
|
else if (local_got_refcounts != NULL)
|
else if (local_got_refcounts != NULL)
|
{
|
{
|
if (local_got_refcounts[r_symndx] > 0)
|
if (local_got_refcounts[r_symndx] > 0)
|
{
|
{
|
local_got_refcounts[r_symndx] -= 1;
|
local_got_refcounts[r_symndx] -= 1;
|
if (local_got_refcounts[r_symndx] == 0)
|
if (local_got_refcounts[r_symndx] == 0)
|
{
|
{
|
sgot->_raw_size -= 4;
|
sgot->_raw_size -= 4;
|
if (info->shared)
|
if (info->shared)
|
srelgot->_raw_size -= sizeof (Elf32_External_Rela);
|
srelgot->_raw_size -= sizeof (Elf32_External_Rela);
|
}
|
}
|
}
|
}
|
}
|
}
|
break;
|
break;
|
|
|
case R_390_PLT16DBL:
|
case R_390_PLT16DBL:
|
case R_390_PLT32:
|
case R_390_PLT32:
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
if (r_symndx >= symtab_hdr->sh_info)
|
if (r_symndx >= symtab_hdr->sh_info)
|
{
|
{
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
if (h->plt.refcount > 0)
|
if (h->plt.refcount > 0)
|
h->plt.refcount -= 1;
|
h->plt.refcount -= 1;
|
}
|
}
|
break;
|
break;
|
|
|
default:
|
default:
|
break;
|
break;
|
}
|
}
|
|
|
return true;
|
return true;
|
}
|
}
|
|
|
/* Adjust a symbol defined by a dynamic object and referenced by a
|
/* Adjust a symbol defined by a dynamic object and referenced by a
|
regular object. The current definition is in some section of the
|
regular object. The current definition is in some section of the
|
dynamic object, but we're not including those sections. We have to
|
dynamic object, but we're not including those sections. We have to
|
change the definition to something the rest of the link can
|
change the definition to something the rest of the link can
|
understand. */
|
understand. */
|
|
|
static boolean
|
static boolean
|
elf_s390_adjust_dynamic_symbol (info, h)
|
elf_s390_adjust_dynamic_symbol (info, h)
|
struct bfd_link_info *info;
|
struct bfd_link_info *info;
|
struct elf_link_hash_entry *h;
|
struct elf_link_hash_entry *h;
|
{
|
{
|
bfd *dynobj;
|
bfd *dynobj;
|
asection *s;
|
asection *s;
|
unsigned int power_of_two;
|
unsigned int power_of_two;
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
dynobj = elf_hash_table (info)->dynobj;
|
|
|
/* Make sure we know what is going on here. */
|
/* Make sure we know what is going on here. */
|
BFD_ASSERT (dynobj != NULL
|
BFD_ASSERT (dynobj != NULL
|
&& ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
|
&& ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
|
|| h->weakdef != NULL
|
|| h->weakdef != NULL
|
|| ((h->elf_link_hash_flags
|
|| ((h->elf_link_hash_flags
|
& ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
& ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
&& (h->elf_link_hash_flags
|
&& (h->elf_link_hash_flags
|
& ELF_LINK_HASH_REF_REGULAR) != 0
|
& ELF_LINK_HASH_REF_REGULAR) != 0
|
&& (h->elf_link_hash_flags
|
&& (h->elf_link_hash_flags
|
& ELF_LINK_HASH_DEF_REGULAR) == 0)));
|
& ELF_LINK_HASH_DEF_REGULAR) == 0)));
|
|
|
/* If this is a function, put it in the procedure linkage table. We
|
/* If this is a function, put it in the procedure linkage table. We
|
will fill in the contents of the procedure linkage table later
|
will fill in the contents of the procedure linkage table later
|
(although we could actually do it here). */
|
(although we could actually do it here). */
|
if (h->type == STT_FUNC
|
if (h->type == STT_FUNC
|
|| (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
|
|| (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
|
{
|
{
|
if ((! info->shared
|
if ((! info->shared
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
|
|| (info->shared && h->plt.refcount <= 0))
|
|| (info->shared && h->plt.refcount <= 0))
|
{
|
{
|
/* This case can occur if we saw a PLT32 reloc in an input
|
/* This case can occur if we saw a PLT32 reloc in an input
|
file, but the symbol was never referred to by a dynamic
|
file, but the symbol was never referred to by a dynamic
|
object, or if all references were garbage collected. In
|
object, or if all references were garbage collected. In
|
such a case, we don't actually need to build a procedure
|
such a case, we don't actually need to build a procedure
|
linkage table, and we can just do a PC32 reloc instead. */
|
linkage table, and we can just do a PC32 reloc instead. */
|
h->plt.offset = (bfd_vma) -1;
|
h->plt.offset = (bfd_vma) -1;
|
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
return true;
|
return true;
|
}
|
}
|
|
|
/* Make sure this symbol is output as a dynamic symbol. */
|
/* Make sure this symbol is output as a dynamic symbol. */
|
if (h->dynindx == -1)
|
if (h->dynindx == -1)
|
{
|
{
|
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
return false;
|
return false;
|
}
|
}
|
|
|
s = bfd_get_section_by_name (dynobj, ".plt");
|
s = bfd_get_section_by_name (dynobj, ".plt");
|
BFD_ASSERT (s != NULL);
|
BFD_ASSERT (s != NULL);
|
|
|
/* The first entry in .plt is reserved. */
|
/* The first entry in .plt is reserved. */
|
if (s->_raw_size == 0)
|
if (s->_raw_size == 0)
|
s->_raw_size = PLT_FIRST_ENTRY_SIZE;
|
s->_raw_size = PLT_FIRST_ENTRY_SIZE;
|
|
|
/* If this symbol is not defined in a regular file, and we are
|
/* If this symbol is not defined in a regular file, and we are
|
not generating a shared library, then set the symbol to this
|
not generating a shared library, then set the symbol to this
|
location in the .plt. This is required to make function
|
location in the .plt. This is required to make function
|
pointers compare as equal between the normal executable and
|
pointers compare as equal between the normal executable and
|
the shared library. */
|
the shared library. */
|
if (! info->shared
|
if (! info->shared
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
{
|
{
|
h->root.u.def.section = s;
|
h->root.u.def.section = s;
|
h->root.u.def.value = s->_raw_size;
|
h->root.u.def.value = s->_raw_size;
|
}
|
}
|
|
|
h->plt.offset = s->_raw_size;
|
h->plt.offset = s->_raw_size;
|
|
|
/* Make room for this entry. */
|
/* Make room for this entry. */
|
s->_raw_size += PLT_ENTRY_SIZE;
|
s->_raw_size += PLT_ENTRY_SIZE;
|
|
|
/* We also need to make an entry in the .got.plt section, which
|
/* We also need to make an entry in the .got.plt section, which
|
will be placed in the .got section by the linker script. */
|
will be placed in the .got section by the linker script. */
|
s = bfd_get_section_by_name (dynobj, ".got.plt");
|
s = bfd_get_section_by_name (dynobj, ".got.plt");
|
BFD_ASSERT (s != NULL);
|
BFD_ASSERT (s != NULL);
|
s->_raw_size += GOT_ENTRY_SIZE;
|
s->_raw_size += GOT_ENTRY_SIZE;
|
|
|
/* We also need to make an entry in the .rela.plt section. */
|
/* We also need to make an entry in the .rela.plt section. */
|
s = bfd_get_section_by_name (dynobj, ".rela.plt");
|
s = bfd_get_section_by_name (dynobj, ".rela.plt");
|
BFD_ASSERT (s != NULL);
|
BFD_ASSERT (s != NULL);
|
s->_raw_size += sizeof (Elf32_External_Rela);
|
s->_raw_size += sizeof (Elf32_External_Rela);
|
|
|
return true;
|
return true;
|
}
|
}
|
|
|
/* If this is a weak symbol, and there is a real definition, the
|
/* If this is a weak symbol, and there is a real definition, the
|
processor independent code will have arranged for us to see the
|
processor independent code will have arranged for us to see the
|
real definition first, and we can just use the same value. */
|
real definition first, and we can just use the same value. */
|
if (h->weakdef != NULL)
|
if (h->weakdef != NULL)
|
{
|
{
|
BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
|
BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
|
|| h->weakdef->root.type == bfd_link_hash_defweak);
|
|| h->weakdef->root.type == bfd_link_hash_defweak);
|
h->root.u.def.section = h->weakdef->root.u.def.section;
|
h->root.u.def.section = h->weakdef->root.u.def.section;
|
h->root.u.def.value = h->weakdef->root.u.def.value;
|
h->root.u.def.value = h->weakdef->root.u.def.value;
|
return true;
|
return true;
|
}
|
}
|
|
|
/* This is a reference to a symbol defined by a dynamic object which
|
/* This is a reference to a symbol defined by a dynamic object which
|
is not a function. */
|
is not a function. */
|
|
|
/* If we are creating a shared library, we must presume that the
|
/* If we are creating a shared library, we must presume that the
|
only references to the symbol are via the global offset table.
|
only references to the symbol are via the global offset table.
|
For such cases we need not do anything here; the relocations will
|
For such cases we need not do anything here; the relocations will
|
be handled correctly by relocate_section. */
|
be handled correctly by relocate_section. */
|
if (info->shared)
|
if (info->shared)
|
return true;
|
return true;
|
|
|
/* If there are no references to this symbol that do not use the
|
/* If there are no references to this symbol that do not use the
|
GOT, we don't need to generate a copy reloc. */
|
GOT, we don't need to generate a copy reloc. */
|
if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
|
if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
|
return true;
|
return true;
|
|
|
/* We must allocate the symbol in our .dynbss section, which will
|
/* We must allocate the symbol in our .dynbss section, which will
|
become part of the .bss section of the executable. There will be
|
become part of the .bss section of the executable. There will be
|
an entry for this symbol in the .dynsym section. The dynamic
|
an entry for this symbol in the .dynsym section. The dynamic
|
object will contain position independent code, so all references
|
object will contain position independent code, so all references
|
from the dynamic object to this symbol will go through the global
|
from the dynamic object to this symbol will go through the global
|
offset table. The dynamic linker will use the .dynsym entry to
|
offset table. The dynamic linker will use the .dynsym entry to
|
determine the address it must put in the global offset table, so
|
determine the address it must put in the global offset table, so
|
both the dynamic object and the regular object will refer to the
|
both the dynamic object and the regular object will refer to the
|
same memory location for the variable. */
|
same memory location for the variable. */
|
|
|
s = bfd_get_section_by_name (dynobj, ".dynbss");
|
s = bfd_get_section_by_name (dynobj, ".dynbss");
|
BFD_ASSERT (s != NULL);
|
BFD_ASSERT (s != NULL);
|
|
|
/* We must generate a R_390_COPY reloc to tell the dynamic linker
|
/* We must generate a R_390_COPY reloc to tell the dynamic linker
|
to copy the initial value out of the dynamic object and into the
|
to copy the initial value out of the dynamic object and into the
|
runtime process image. We need to remember the offset into the
|
runtime process image. We need to remember the offset into the
|
.rel.bss section we are going to use. */
|
.rel.bss section we are going to use. */
|
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
{
|
{
|
asection *srel;
|
asection *srel;
|
|
|
srel = bfd_get_section_by_name (dynobj, ".rela.bss");
|
srel = bfd_get_section_by_name (dynobj, ".rela.bss");
|
BFD_ASSERT (srel != NULL);
|
BFD_ASSERT (srel != NULL);
|
srel->_raw_size += sizeof (Elf32_External_Rela);
|
srel->_raw_size += sizeof (Elf32_External_Rela);
|
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
|
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
|
}
|
}
|
|
|
/* We need to figure out the alignment required for this symbol. I
|
/* We need to figure out the alignment required for this symbol. I
|
have no idea how ELF linkers handle this. */
|
have no idea how ELF linkers handle this. */
|
power_of_two = bfd_log2 (h->size);
|
power_of_two = bfd_log2 (h->size);
|
if (power_of_two > 3)
|
if (power_of_two > 3)
|
power_of_two = 3;
|
power_of_two = 3;
|
|
|
/* Apply the required alignment. */
|
/* Apply the required alignment. */
|
s->_raw_size = BFD_ALIGN (s->_raw_size,
|
s->_raw_size = BFD_ALIGN (s->_raw_size,
|
(bfd_size_type) (1 << power_of_two));
|
(bfd_size_type) (1 << power_of_two));
|
if (power_of_two > bfd_get_section_alignment (dynobj, s))
|
if (power_of_two > bfd_get_section_alignment (dynobj, s))
|
{
|
{
|
if (! bfd_set_section_alignment (dynobj, s, power_of_two))
|
if (! bfd_set_section_alignment (dynobj, s, power_of_two))
|
return false;
|
return false;
|
}
|
}
|
|
|
/* Define the symbol as being at this point in the section. */
|
/* Define the symbol as being at this point in the section. */
|
h->root.u.def.section = s;
|
h->root.u.def.section = s;
|
h->root.u.def.value = s->_raw_size;
|
h->root.u.def.value = s->_raw_size;
|
|
|
/* Increment the section size to make room for the symbol. */
|
/* Increment the section size to make room for the symbol. */
|
s->_raw_size += h->size;
|
s->_raw_size += h->size;
|
|
|
return true;
|
return true;
|
}
|
}
|
|
|
/* Set the sizes of the dynamic sections. */
|
/* Set the sizes of the dynamic sections. */
|
|
|
static boolean
|
static boolean
|
elf_s390_size_dynamic_sections (output_bfd, info)
|
elf_s390_size_dynamic_sections (output_bfd, info)
|
bfd *output_bfd;
|
bfd *output_bfd;
|
struct bfd_link_info *info;
|
struct bfd_link_info *info;
|
{
|
{
|
bfd *dynobj;
|
bfd *dynobj;
|
asection *s;
|
asection *s;
|
boolean reltext;
|
boolean reltext;
|
boolean relocs;
|
boolean relocs;
|
boolean plt;
|
boolean plt;
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
dynobj = elf_hash_table (info)->dynobj;
|
BFD_ASSERT (dynobj != NULL);
|
BFD_ASSERT (dynobj != NULL);
|
|
|
if (elf_hash_table (info)->dynamic_sections_created)
|
if (elf_hash_table (info)->dynamic_sections_created)
|
{
|
{
|
/* Set the contents of the .interp section to the interpreter. */
|
/* Set the contents of the .interp section to the interpreter. */
|
if (! info->shared)
|
if (! info->shared)
|
{
|
{
|
s = bfd_get_section_by_name (dynobj, ".interp");
|
s = bfd_get_section_by_name (dynobj, ".interp");
|
BFD_ASSERT (s != NULL);
|
BFD_ASSERT (s != NULL);
|
s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
|
s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
|
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
}
|
}
|
}
|
}
|
else
|
else
|
{
|
{
|
/* We may have created entries in the .rela.got section.
|
/* We may have created entries in the .rela.got section.
|
However, if we are not creating the dynamic sections, we will
|
However, if we are not creating the dynamic sections, we will
|
not actually use these entries. Reset the size of .rela.got,
|
not actually use these entries. Reset the size of .rela.got,
|
which will cause it to get stripped from the output file
|
which will cause it to get stripped from the output file
|
below. */
|
below. */
|
s = bfd_get_section_by_name (dynobj, ".rela.got");
|
s = bfd_get_section_by_name (dynobj, ".rela.got");
|
if (s != NULL)
|
if (s != NULL)
|
s->_raw_size = 0;
|
s->_raw_size = 0;
|
}
|
}
|
|
|
/* If this is a -Bsymbolic shared link, then we need to discard all
|
/* If this is a -Bsymbolic shared link, then we need to discard all
|
PC relative relocs against symbols defined in a regular object.
|
PC relative relocs against symbols defined in a regular object.
|
We allocated space for them in the check_relocs routine, but we
|
We allocated space for them in the check_relocs routine, but we
|
will not fill them in in the relocate_section routine. */
|
will not fill them in in the relocate_section routine. */
|
if (info->shared)
|
if (info->shared)
|
elf_s390_link_hash_traverse (elf_s390_hash_table (info),
|
elf_s390_link_hash_traverse (elf_s390_hash_table (info),
|
elf_s390_discard_copies,
|
elf_s390_discard_copies,
|
(PTR) info);
|
(PTR) info);
|
|
|
/* The check_relocs and adjust_dynamic_symbol entry points have
|
/* The check_relocs and adjust_dynamic_symbol entry points have
|
determined the sizes of the various dynamic sections. Allocate
|
determined the sizes of the various dynamic sections. Allocate
|
memory for them. */
|
memory for them. */
|
plt = false;
|
plt = false;
|
reltext = false;
|
reltext = false;
|
relocs = false;
|
relocs = false;
|
for (s = dynobj->sections; s != NULL; s = s->next)
|
for (s = dynobj->sections; s != NULL; s = s->next)
|
{
|
{
|
const char *name;
|
const char *name;
|
boolean strip;
|
boolean strip;
|
|
|
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
continue;
|
continue;
|
|
|
/* It's OK to base decisions on the section name, because none
|
/* It's OK to base decisions on the section name, because none
|
of the dynobj section names depend upon the input files. */
|
of the dynobj section names depend upon the input files. */
|
name = bfd_get_section_name (dynobj, s);
|
name = bfd_get_section_name (dynobj, s);
|
|
|
strip = false;
|
strip = false;
|
|
|
if (strcmp (name, ".plt") == 0)
|
if (strcmp (name, ".plt") == 0)
|
{
|
{
|
if (s->_raw_size == 0)
|
if (s->_raw_size == 0)
|
{
|
{
|
/* Strip this section if we don't need it; see the
|
/* Strip this section if we don't need it; see the
|
comment below. */
|
comment below. */
|
strip = true;
|
strip = true;
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Remember whether there is a PLT. */
|
/* Remember whether there is a PLT. */
|
plt = true;
|
plt = true;
|
}
|
}
|
}
|
}
|
else if (strncmp (name, ".rela", 5) == 0)
|
else if (strncmp (name, ".rela", 5) == 0)
|
{
|
{
|
if (s->_raw_size == 0)
|
if (s->_raw_size == 0)
|
{
|
{
|
/* If we don't need this section, strip it from the
|
/* If we don't need this section, strip it from the
|
output file. This is to handle .rela.bss and
|
output file. This is to handle .rela.bss and
|
.rel.plt. We must create it in
|
.rel.plt. We must create it in
|
create_dynamic_sections, because it must be created
|
create_dynamic_sections, because it must be created
|
before the linker maps input sections to output
|
before the linker maps input sections to output
|
sections. The linker does that before
|
sections. The linker does that before
|
adjust_dynamic_symbol is called, and it is that
|
adjust_dynamic_symbol is called, and it is that
|
function which decides whether anything needs to go
|
function which decides whether anything needs to go
|
into these sections. */
|
into these sections. */
|
strip = true;
|
strip = true;
|
}
|
}
|
else
|
else
|
{
|
{
|
asection *target;
|
asection *target;
|
|
|
/* Remember whether there are any reloc sections other
|
/* Remember whether there are any reloc sections other
|
than .rela.plt. */
|
than .rela.plt. */
|
if (strcmp (name, ".rela.plt") != 0)
|
if (strcmp (name, ".rela.plt") != 0)
|
{
|
{
|
const char *outname;
|
const char *outname;
|
|
|
relocs = true;
|
relocs = true;
|
|
|
/* If this relocation section applies to a read only
|
/* If this relocation section applies to a read only
|
section, then we probably need a DT_TEXTREL
|
section, then we probably need a DT_TEXTREL
|
entry. The entries in the .rela.plt section
|
entry. The entries in the .rela.plt section
|
really apply to the .got section, which we
|
really apply to the .got section, which we
|
created ourselves and so know is not readonly. */
|
created ourselves and so know is not readonly. */
|
outname = bfd_get_section_name (output_bfd,
|
outname = bfd_get_section_name (output_bfd,
|
s->output_section);
|
s->output_section);
|
target = bfd_get_section_by_name (output_bfd, outname + 5);
|
target = bfd_get_section_by_name (output_bfd, outname + 5);
|
if (target != NULL
|
if (target != NULL
|
&& (target->flags & SEC_READONLY) != 0
|
&& (target->flags & SEC_READONLY) != 0
|
&& (target->flags & SEC_ALLOC) != 0)
|
&& (target->flags & SEC_ALLOC) != 0)
|
reltext = true;
|
reltext = true;
|
}
|
}
|
|
|
/* We use the reloc_count field as a counter if we need
|
/* We use the reloc_count field as a counter if we need
|
to copy relocs into the output file. */
|
to copy relocs into the output file. */
|
s->reloc_count = 0;
|
s->reloc_count = 0;
|
}
|
}
|
}
|
}
|
else if (strncmp (name, ".got", 4) != 0)
|
else if (strncmp (name, ".got", 4) != 0)
|
{
|
{
|
/* It's not one of our sections, so don't allocate space. */
|
/* It's not one of our sections, so don't allocate space. */
|
continue;
|
continue;
|
}
|
}
|
|
|
if (strip)
|
if (strip)
|
{
|
{
|
_bfd_strip_section_from_output (info, s);
|
_bfd_strip_section_from_output (info, s);
|
continue;
|
continue;
|
}
|
}
|
|
|
/* Allocate memory for the section contents. */
|
/* Allocate memory for the section contents. */
|
s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
|
s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
|
if (s->contents == NULL && s->_raw_size != 0)
|
if (s->contents == NULL && s->_raw_size != 0)
|
return false;
|
return false;
|
}
|
}
|
|
|
if (elf_hash_table (info)->dynamic_sections_created)
|
if (elf_hash_table (info)->dynamic_sections_created)
|
{
|
{
|
/* Add some entries to the .dynamic section. We fill in the
|
/* Add some entries to the .dynamic section. We fill in the
|
values later, in elf_s390_finish_dynamic_sections, but we
|
values later, in elf_s390_finish_dynamic_sections, but we
|
must add the entries now so that we get the correct size for
|
must add the entries now so that we get the correct size for
|
the .dynamic section. The DT_DEBUG entry is filled in by the
|
the .dynamic section. The DT_DEBUG entry is filled in by the
|
dynamic linker and used by the debugger. */
|
dynamic linker and used by the debugger. */
|
if (! info->shared)
|
if (! info->shared)
|
{
|
{
|
if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
|
if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
|
return false;
|
return false;
|
}
|
}
|
|
|
if (plt)
|
if (plt)
|
{
|
{
|
if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
|
if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
|
|| ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
|
|| ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
|
|| ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
|
|| ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
|
|| ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
|
|| ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
|
return false;
|
return false;
|
}
|
}
|
|
|
if (relocs)
|
if (relocs)
|
{
|
{
|
if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
|
if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
|
|| ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
|
|| ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
|
|| ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
|
|| ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
|
sizeof (Elf32_External_Rela)))
|
sizeof (Elf32_External_Rela)))
|
return false;
|
return false;
|
}
|
}
|
|
|
if (reltext)
|
if (reltext)
|
{
|
{
|
if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
|
if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
|
return false;
|
return false;
|
info->flags |= DF_TEXTREL;
|
info->flags |= DF_TEXTREL;
|
}
|
}
|
}
|
}
|
|
|
return true;
|
return true;
|
}
|
}
|
|
|
/* This function is called via elf_s390_link_hash_traverse if we are
|
/* This function is called via elf_s390_link_hash_traverse if we are
|
creating a shared object with -Bsymbolic. It discards the space
|
creating a shared object with -Bsymbolic. It discards the space
|
allocated to copy PC relative relocs against symbols which are
|
allocated to copy PC relative relocs against symbols which are
|
defined in regular objects. We allocated space for them in the
|
defined in regular objects. We allocated space for them in the
|
check_relocs routine, but we won't fill them in in the
|
check_relocs routine, but we won't fill them in in the
|
relocate_section routine. */
|
relocate_section routine. */
|
|
|
/*ARGSUSED*/
|
/*ARGSUSED*/
|
static boolean
|
static boolean
|
elf_s390_discard_copies (h, inf)
|
elf_s390_discard_copies (h, inf)
|
struct elf_s390_link_hash_entry *h;
|
struct elf_s390_link_hash_entry *h;
|
PTR inf;
|
PTR inf;
|
{
|
{
|
struct elf_s390_pcrel_relocs_copied *s;
|
struct elf_s390_pcrel_relocs_copied *s;
|
struct bfd_link_info *info = (struct bfd_link_info *) inf;
|
struct bfd_link_info *info = (struct bfd_link_info *) inf;
|
|
|
/* If a symbol has been forced local or we have found a regular
|
/* If a symbol has been forced local or we have found a regular
|
definition for the symbolic link case, then we won't be needing
|
definition for the symbolic link case, then we won't be needing
|
any relocs. */
|
any relocs. */
|
if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
|
if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
|
&& ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
|
&& ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
|
|| info->symbolic))
|
|| info->symbolic))
|
{
|
{
|
for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
|
for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
|
s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela);
|
s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela);
|
}
|
}
|
return true;
|
return true;
|
}
|
}
|
/* Relocate a 390 ELF section. */
|
/* Relocate a 390 ELF section. */
|
|
|
static boolean
|
static boolean
|
elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
|
elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
|
contents, relocs, local_syms, local_sections)
|
contents, relocs, local_syms, local_sections)
|
bfd *output_bfd;
|
bfd *output_bfd;
|
struct bfd_link_info *info;
|
struct bfd_link_info *info;
|
bfd *input_bfd;
|
bfd *input_bfd;
|
asection *input_section;
|
asection *input_section;
|
bfd_byte *contents;
|
bfd_byte *contents;
|
Elf_Internal_Rela *relocs;
|
Elf_Internal_Rela *relocs;
|
Elf_Internal_Sym *local_syms;
|
Elf_Internal_Sym *local_syms;
|
asection **local_sections;
|
asection **local_sections;
|
{
|
{
|
bfd *dynobj;
|
bfd *dynobj;
|
Elf_Internal_Shdr *symtab_hdr;
|
Elf_Internal_Shdr *symtab_hdr;
|
struct elf_link_hash_entry **sym_hashes;
|
struct elf_link_hash_entry **sym_hashes;
|
bfd_vma *local_got_offsets;
|
bfd_vma *local_got_offsets;
|
asection *sgot;
|
asection *sgot;
|
asection *splt;
|
asection *splt;
|
asection *sreloc;
|
asection *sreloc;
|
Elf_Internal_Rela *rel;
|
Elf_Internal_Rela *rel;
|
Elf_Internal_Rela *relend;
|
Elf_Internal_Rela *relend;
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
dynobj = elf_hash_table (info)->dynobj;
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
sym_hashes = elf_sym_hashes (input_bfd);
|
sym_hashes = elf_sym_hashes (input_bfd);
|
local_got_offsets = elf_local_got_offsets (input_bfd);
|
local_got_offsets = elf_local_got_offsets (input_bfd);
|
|
|
sgot = NULL;
|
sgot = NULL;
|
splt = NULL;
|
splt = NULL;
|
sreloc = NULL;
|
sreloc = NULL;
|
if (dynobj != NULL)
|
if (dynobj != NULL)
|
{
|
{
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
}
|
}
|
|
|
rel = relocs;
|
rel = relocs;
|
relend = relocs + input_section->reloc_count;
|
relend = relocs + input_section->reloc_count;
|
for (; rel < relend; rel++)
|
for (; rel < relend; rel++)
|
{
|
{
|
int r_type;
|
int r_type;
|
reloc_howto_type *howto;
|
reloc_howto_type *howto;
|
unsigned long r_symndx;
|
unsigned long r_symndx;
|
struct elf_link_hash_entry *h;
|
struct elf_link_hash_entry *h;
|
Elf_Internal_Sym *sym;
|
Elf_Internal_Sym *sym;
|
asection *sec;
|
asection *sec;
|
bfd_vma relocation;
|
bfd_vma relocation;
|
bfd_reloc_status_type r;
|
bfd_reloc_status_type r;
|
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
r_type = ELF32_R_TYPE (rel->r_info);
|
if (r_type == (int) R_390_GNU_VTINHERIT
|
if (r_type == (int) R_390_GNU_VTINHERIT
|
|| r_type == (int) R_390_GNU_VTENTRY)
|
|| r_type == (int) R_390_GNU_VTENTRY)
|
continue;
|
continue;
|
if (r_type < 0 || r_type >= (int) R_390_max)
|
if (r_type < 0 || r_type >= (int) R_390_max)
|
{
|
{
|
bfd_set_error (bfd_error_bad_value);
|
bfd_set_error (bfd_error_bad_value);
|
return false;
|
return false;
|
}
|
}
|
howto = elf_howto_table + r_type;
|
howto = elf_howto_table + r_type;
|
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
|
if (info->relocateable)
|
if (info->relocateable)
|
{
|
{
|
/* This is a relocateable link. We don't have to change
|
/* This is a relocateable link. We don't have to change
|
anything, unless the reloc is against a section symbol,
|
anything, unless the reloc is against a section symbol,
|
in which case we have to adjust according to where the
|
in which case we have to adjust according to where the
|
section symbol winds up in the output section. */
|
section symbol winds up in the output section. */
|
if (r_symndx < symtab_hdr->sh_info)
|
if (r_symndx < symtab_hdr->sh_info)
|
{
|
{
|
sym = local_syms + r_symndx;
|
sym = local_syms + r_symndx;
|
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
{
|
{
|
sec = local_sections[r_symndx];
|
sec = local_sections[r_symndx];
|
rel->r_addend += sec->output_offset + sym->st_value;
|
rel->r_addend += sec->output_offset + sym->st_value;
|
}
|
}
|
}
|
}
|
|
|
continue;
|
continue;
|
}
|
}
|
|
|
/* This is a final link. */
|
/* This is a final link. */
|
h = NULL;
|
h = NULL;
|
sym = NULL;
|
sym = NULL;
|
sec = NULL;
|
sec = NULL;
|
if (r_symndx < symtab_hdr->sh_info)
|
if (r_symndx < symtab_hdr->sh_info)
|
{
|
{
|
sym = local_syms + r_symndx;
|
sym = local_syms + r_symndx;
|
sec = local_sections[r_symndx];
|
sec = local_sections[r_symndx];
|
relocation = (sec->output_section->vma
|
relocation = (sec->output_section->vma
|
+ sec->output_offset
|
+ sec->output_offset
|
+ sym->st_value);
|
+ sym->st_value);
|
}
|
}
|
else
|
else
|
{
|
{
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
while (h->root.type == bfd_link_hash_indirect
|
while (h->root.type == bfd_link_hash_indirect
|
|| h->root.type == bfd_link_hash_warning)
|
|| h->root.type == bfd_link_hash_warning)
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
if (h->root.type == bfd_link_hash_defined
|
if (h->root.type == bfd_link_hash_defined
|
|| h->root.type == bfd_link_hash_defweak)
|
|| h->root.type == bfd_link_hash_defweak)
|
{
|
{
|
sec = h->root.u.def.section;
|
sec = h->root.u.def.section;
|
if (r_type == R_390_GOTPC
|
if (r_type == R_390_GOTPC
|
|| ((r_type == R_390_PLT16DBL ||
|
|| ((r_type == R_390_PLT16DBL ||
|
r_type == R_390_PLT32)
|
r_type == R_390_PLT32)
|
&& splt != NULL
|
&& splt != NULL
|
&& h->plt.offset != (bfd_vma) -1)
|
&& h->plt.offset != (bfd_vma) -1)
|
|| ((r_type == R_390_GOT12 ||
|
|| ((r_type == R_390_GOT12 ||
|
r_type == R_390_GOT16 ||
|
r_type == R_390_GOT16 ||
|
r_type == R_390_GOT32)
|
r_type == R_390_GOT32)
|
&& elf_hash_table (info)->dynamic_sections_created
|
&& elf_hash_table (info)->dynamic_sections_created
|
&& (! info->shared
|
&& (! info->shared
|
|| (! info->symbolic && h->dynindx != -1)
|
|| (! info->symbolic && h->dynindx != -1)
|
|| (h->elf_link_hash_flags
|
|| (h->elf_link_hash_flags
|
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
|| (info->shared
|
|| (info->shared
|
&& ((! info->symbolic && h->dynindx != -1)
|
&& ((! info->symbolic && h->dynindx != -1)
|
|| (h->elf_link_hash_flags
|
|| (h->elf_link_hash_flags
|
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|
&& ( r_type == R_390_8 ||
|
&& ( r_type == R_390_8 ||
|
r_type == R_390_16 ||
|
r_type == R_390_16 ||
|
r_type == R_390_32 ||
|
r_type == R_390_32 ||
|
r_type == R_390_PC16 ||
|
r_type == R_390_PC16 ||
|
r_type == R_390_PC16DBL ||
|
r_type == R_390_PC16DBL ||
|
r_type == R_390_PC32)
|
r_type == R_390_PC32)
|
&& ((input_section->flags & SEC_ALLOC) != 0
|
&& ((input_section->flags & SEC_ALLOC) != 0
|
/* DWARF will emit R_386_32 relocations in its
|
/* DWARF will emit R_386_32 relocations in its
|
sections against symbols defined externally
|
sections against symbols defined externally
|
in shared libraries. We can't do anything
|
in shared libraries. We can't do anything
|
with them here. */
|
with them here. */
|
|| ((input_section->flags & SEC_DEBUGGING) != 0
|
|| ((input_section->flags & SEC_DEBUGGING) != 0
|
&& (h->elf_link_hash_flags
|
&& (h->elf_link_hash_flags
|
& ELF_LINK_HASH_DEF_DYNAMIC) != 0))))
|
& ELF_LINK_HASH_DEF_DYNAMIC) != 0))))
|
{
|
{
|
/* In these cases, we don't need the relocation
|
/* In these cases, we don't need the relocation
|
value. We check specially because in some
|
value. We check specially because in some
|
obscure cases sec->output_section will be NULL. */
|
obscure cases sec->output_section will be NULL. */
|
relocation = 0;
|
relocation = 0;
|
}
|
}
|
else if (sec->output_section == NULL)
|
else if (sec->output_section == NULL)
|
{
|
{
|
(*_bfd_error_handler)
|
(*_bfd_error_handler)
|
(_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
|
(_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
|
bfd_get_filename (input_bfd), h->root.root.string,
|
bfd_get_filename (input_bfd), h->root.root.string,
|
bfd_get_section_name (input_bfd, input_section));
|
bfd_get_section_name (input_bfd, input_section));
|
relocation = 0;
|
relocation = 0;
|
}
|
}
|
else
|
else
|
relocation = (h->root.u.def.value
|
relocation = (h->root.u.def.value
|
+ sec->output_section->vma
|
+ sec->output_section->vma
|
+ sec->output_offset);
|
+ sec->output_offset);
|
}
|
}
|
else if (h->root.type == bfd_link_hash_undefweak)
|
else if (h->root.type == bfd_link_hash_undefweak)
|
relocation = 0;
|
relocation = 0;
|
else if (info->shared && !info->symbolic
|
else if (info->shared && !info->symbolic
|
&& !info->no_undefined
|
&& !info->no_undefined
|
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
|
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
|
relocation = 0;
|
relocation = 0;
|
else
|
else
|
{
|
{
|
if (! ((*info->callbacks->undefined_symbol)
|
if (! ((*info->callbacks->undefined_symbol)
|
(info, h->root.root.string, input_bfd,
|
(info, h->root.root.string, input_bfd,
|
input_section, rel->r_offset,
|
input_section, rel->r_offset,
|
(!info->shared || info->no_undefined
|
(!info->shared || info->no_undefined
|
|| ELF_ST_VISIBILITY (h->other)))))
|
|| ELF_ST_VISIBILITY (h->other)))))
|
return false;
|
return false;
|
relocation = 0;
|
relocation = 0;
|
}
|
}
|
}
|
}
|
|
|
switch (r_type)
|
switch (r_type)
|
{
|
{
|
case R_390_GOT12:
|
case R_390_GOT12:
|
case R_390_GOT16:
|
case R_390_GOT16:
|
case R_390_GOT32:
|
case R_390_GOT32:
|
/* Relocation is to the entry for this symbol in the global
|
/* Relocation is to the entry for this symbol in the global
|
offset table. */
|
offset table. */
|
BFD_ASSERT (sgot != NULL);
|
BFD_ASSERT (sgot != NULL);
|
|
|
if (h != NULL)
|
if (h != NULL)
|
{
|
{
|
bfd_vma off;
|
bfd_vma off;
|
|
|
off = h->got.offset;
|
off = h->got.offset;
|
BFD_ASSERT (off != (bfd_vma) -1);
|
BFD_ASSERT (off != (bfd_vma) -1);
|
|
|
if (! elf_hash_table (info)->dynamic_sections_created
|
if (! elf_hash_table (info)->dynamic_sections_created
|
|| (info->shared
|
|| (info->shared
|
&& (info->symbolic || h->dynindx == -1)
|
&& (info->symbolic || h->dynindx == -1)
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
|
{
|
{
|
/* This is actually a static link, or it is a
|
/* This is actually a static link, or it is a
|
-Bsymbolic link and the symbol is defined
|
-Bsymbolic link and the symbol is defined
|
locally, or the symbol was forced to be local
|
locally, or the symbol was forced to be local
|
because of a version file. We must initialize
|
because of a version file. We must initialize
|
this entry in the global offset table. Since the
|
this entry in the global offset table. Since the
|
offset must always be a multiple of 2, we use the
|
offset must always be a multiple of 2, we use the
|
least significant bit to record whether we have
|
least significant bit to record whether we have
|
initialized it already.
|
initialized it already.
|
|
|
When doing a dynamic link, we create a .rel.got
|
When doing a dynamic link, we create a .rel.got
|
relocation entry to initialize the value. This
|
relocation entry to initialize the value. This
|
is done in the finish_dynamic_symbol routine. */
|
is done in the finish_dynamic_symbol routine. */
|
if ((off & 1) != 0)
|
if ((off & 1) != 0)
|
off &= ~1;
|
off &= ~1;
|
else
|
else
|
{
|
{
|
bfd_put_32 (output_bfd, relocation,
|
bfd_put_32 (output_bfd, relocation,
|
sgot->contents + off);
|
sgot->contents + off);
|
h->got.offset |= 1;
|
h->got.offset |= 1;
|
}
|
}
|
}
|
}
|
relocation = sgot->output_offset + off;
|
relocation = sgot->output_offset + off;
|
}
|
}
|
else
|
else
|
{
|
{
|
bfd_vma off;
|
bfd_vma off;
|
|
|
BFD_ASSERT (local_got_offsets != NULL
|
BFD_ASSERT (local_got_offsets != NULL
|
&& local_got_offsets[r_symndx] != (bfd_vma) -1);
|
&& local_got_offsets[r_symndx] != (bfd_vma) -1);
|
|
|
off = local_got_offsets[r_symndx];
|
off = local_got_offsets[r_symndx];
|
|
|
/* The offset must always be a multiple of 4. We use
|
/* The offset must always be a multiple of 4. We use
|
the least significant bit to record whether we have
|
the least significant bit to record whether we have
|
already generated the necessary reloc. */
|
already generated the necessary reloc. */
|
if ((off & 1) != 0)
|
if ((off & 1) != 0)
|
off &= ~1;
|
off &= ~1;
|
else
|
else
|
{
|
{
|
bfd_put_32 (output_bfd, relocation, sgot->contents + off);
|
bfd_put_32 (output_bfd, relocation, sgot->contents + off);
|
|
|
if (info->shared)
|
if (info->shared)
|
{
|
{
|
asection *srelgot;
|
asection *srelgot;
|
Elf_Internal_Rela outrel;
|
Elf_Internal_Rela outrel;
|
|
|
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
BFD_ASSERT (srelgot != NULL);
|
BFD_ASSERT (srelgot != NULL);
|
|
|
outrel.r_offset = (sgot->output_section->vma
|
outrel.r_offset = (sgot->output_section->vma
|
+ sgot->output_offset
|
+ sgot->output_offset
|
+ off);
|
+ off);
|
outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
|
outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
|
outrel.r_addend = relocation;
|
outrel.r_addend = relocation;
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
|
(((Elf32_External_Rela *)
|
(((Elf32_External_Rela *)
|
srelgot->contents)
|
srelgot->contents)
|
+ srelgot->reloc_count));
|
+ srelgot->reloc_count));
|
++srelgot->reloc_count;
|
++srelgot->reloc_count;
|
}
|
}
|
|
|
local_got_offsets[r_symndx] |= 1;
|
local_got_offsets[r_symndx] |= 1;
|
}
|
}
|
|
|
relocation = sgot->output_offset + off;
|
relocation = sgot->output_offset + off;
|
}
|
}
|
|
|
|
|
break;
|
break;
|
|
|
case R_390_GOTOFF:
|
case R_390_GOTOFF:
|
/* Relocation is relative to the start of the global offset
|
/* Relocation is relative to the start of the global offset
|
table. */
|
table. */
|
|
|
if (sgot == NULL)
|
if (sgot == NULL)
|
{
|
{
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
BFD_ASSERT (sgot != NULL);
|
BFD_ASSERT (sgot != NULL);
|
}
|
}
|
|
|
/* Note that sgot->output_offset is not involved in this
|
/* Note that sgot->output_offset is not involved in this
|
calculation. We always want the start of .got. If we
|
calculation. We always want the start of .got. If we
|
defined _GLOBAL_OFFSET_TABLE in a different way, as is
|
defined _GLOBAL_OFFSET_TABLE in a different way, as is
|
permitted by the ABI, we might have to change this
|
permitted by the ABI, we might have to change this
|
calculation. */
|
calculation. */
|
relocation -= sgot->output_section->vma;
|
relocation -= sgot->output_section->vma;
|
|
|
break;
|
break;
|
|
|
case R_390_GOTPC:
|
case R_390_GOTPC:
|
/* Use global offset table as symbol value. */
|
/* Use global offset table as symbol value. */
|
|
|
if (sgot == NULL)
|
if (sgot == NULL)
|
{
|
{
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
BFD_ASSERT (sgot != NULL);
|
BFD_ASSERT (sgot != NULL);
|
}
|
}
|
|
|
relocation = sgot->output_section->vma;
|
relocation = sgot->output_section->vma;
|
|
|
break;
|
break;
|
|
|
case R_390_PLT16DBL:
|
case R_390_PLT16DBL:
|
case R_390_PLT32:
|
case R_390_PLT32:
|
/* Relocation is to the entry for this symbol in the
|
/* Relocation is to the entry for this symbol in the
|
procedure linkage table. */
|
procedure linkage table. */
|
|
|
/* Resolve a PLT32 reloc against a local symbol directly,
|
/* Resolve a PLT32 reloc against a local symbol directly,
|
without using the procedure linkage table. */
|
without using the procedure linkage table. */
|
if (h == NULL)
|
if (h == NULL)
|
break;
|
break;
|
|
|
if (h->plt.offset == (bfd_vma) -1 || splt == NULL)
|
if (h->plt.offset == (bfd_vma) -1 || splt == NULL)
|
{
|
{
|
/* We didn't make a PLT entry for this symbol. This
|
/* We didn't make a PLT entry for this symbol. This
|
happens when statically linking PIC code, or when
|
happens when statically linking PIC code, or when
|
using -Bsymbolic. */
|
using -Bsymbolic. */
|
break;
|
break;
|
}
|
}
|
|
|
relocation = (splt->output_section->vma
|
relocation = (splt->output_section->vma
|
+ splt->output_offset
|
+ splt->output_offset
|
+ h->plt.offset);
|
+ h->plt.offset);
|
|
|
break;
|
break;
|
|
|
case R_390_8:
|
case R_390_8:
|
case R_390_16:
|
case R_390_16:
|
case R_390_32:
|
case R_390_32:
|
case R_390_PC16:
|
case R_390_PC16:
|
case R_390_PC16DBL:
|
case R_390_PC16DBL:
|
case R_390_PC32:
|
case R_390_PC32:
|
if (info->shared
|
if (info->shared
|
&& (input_section->flags & SEC_ALLOC) != 0
|
&& (input_section->flags & SEC_ALLOC) != 0
|
&& ((r_type != R_390_PC16 &&
|
&& ((r_type != R_390_PC16 &&
|
r_type != R_390_PC16DBL &&
|
r_type != R_390_PC16DBL &&
|
r_type != R_390_PC32)
|
r_type != R_390_PC32)
|
|| (h != NULL
|
|| (h != NULL
|
&& h->dynindx != -1
|
&& h->dynindx != -1
|
&& (! info->symbolic
|
&& (! info->symbolic
|
|| (h->elf_link_hash_flags
|
|| (h->elf_link_hash_flags
|
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|
{
|
{
|
Elf_Internal_Rela outrel;
|
Elf_Internal_Rela outrel;
|
boolean skip, relocate;
|
boolean skip, relocate;
|
|
|
/* When generating a shared object, these relocations
|
/* When generating a shared object, these relocations
|
are copied into the output file to be resolved at run
|
are copied into the output file to be resolved at run
|
time. */
|
time. */
|
|
|
if (sreloc == NULL)
|
if (sreloc == NULL)
|
{
|
{
|
const char *name;
|
const char *name;
|
|
|
name = (bfd_elf_string_from_elf_section
|
name = (bfd_elf_string_from_elf_section
|
(input_bfd,
|
(input_bfd,
|
elf_elfheader (input_bfd)->e_shstrndx,
|
elf_elfheader (input_bfd)->e_shstrndx,
|
elf_section_data (input_section)->rel_hdr.sh_name));
|
elf_section_data (input_section)->rel_hdr.sh_name));
|
if (name == NULL)
|
if (name == NULL)
|
return false;
|
return false;
|
|
|
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
|
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
|
&& strcmp (bfd_get_section_name (input_bfd,
|
&& strcmp (bfd_get_section_name (input_bfd,
|
input_section),
|
input_section),
|
name + 5) == 0);
|
name + 5) == 0);
|
|
|
sreloc = bfd_get_section_by_name (dynobj, name);
|
sreloc = bfd_get_section_by_name (dynobj, name);
|
BFD_ASSERT (sreloc != NULL);
|
BFD_ASSERT (sreloc != NULL);
|
}
|
}
|
|
|
skip = false;
|
skip = false;
|
|
|
if (elf_section_data (input_section)->stab_info == NULL)
|
if (elf_section_data (input_section)->stab_info == NULL)
|
outrel.r_offset = rel->r_offset;
|
outrel.r_offset = rel->r_offset;
|
else
|
else
|
{
|
{
|
bfd_vma off;
|
bfd_vma off;
|
|
|
off = (_bfd_stab_section_offset
|
off = (_bfd_stab_section_offset
|
(output_bfd, &elf_hash_table (info)->stab_info,
|
(output_bfd, &elf_hash_table (info)->stab_info,
|
input_section,
|
input_section,
|
&elf_section_data (input_section)->stab_info,
|
&elf_section_data (input_section)->stab_info,
|
rel->r_offset));
|
rel->r_offset));
|
if (off == (bfd_vma) -1)
|
if (off == (bfd_vma) -1)
|
skip = true;
|
skip = true;
|
outrel.r_offset = off;
|
outrel.r_offset = off;
|
}
|
}
|
|
|
outrel.r_offset += (input_section->output_section->vma
|
outrel.r_offset += (input_section->output_section->vma
|
+ input_section->output_offset);
|
+ input_section->output_offset);
|
|
|
if (skip)
|
if (skip)
|
{
|
{
|
memset (&outrel, 0, sizeof outrel);
|
memset (&outrel, 0, sizeof outrel);
|
relocate = false;
|
relocate = false;
|
}
|
}
|
else if (r_type == R_390_PC16 ||
|
else if (r_type == R_390_PC16 ||
|
r_type == R_390_PC16DBL ||
|
r_type == R_390_PC16DBL ||
|
r_type == R_390_PC32)
|
r_type == R_390_PC32)
|
{
|
{
|
BFD_ASSERT (h != NULL && h->dynindx != -1);
|
BFD_ASSERT (h != NULL && h->dynindx != -1);
|
relocate = false;
|
relocate = false;
|
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
|
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
|
outrel.r_addend = relocation + rel->r_addend;
|
outrel.r_addend = relocation + rel->r_addend;
|
}
|
}
|
else
|
else
|
{
|
{
|
/* h->dynindx may be -1 if this symbol was marked to
|
/* h->dynindx may be -1 if this symbol was marked to
|
become local. */
|
become local. */
|
if (h == NULL
|
if (h == NULL
|
|| ((info->symbolic || h->dynindx == -1)
|
|| ((info->symbolic || h->dynindx == -1)
|
&& (h->elf_link_hash_flags
|
&& (h->elf_link_hash_flags
|
& ELF_LINK_HASH_DEF_REGULAR) != 0))
|
& ELF_LINK_HASH_DEF_REGULAR) != 0))
|
{
|
{
|
relocate = true;
|
relocate = true;
|
outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
|
outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
|
outrel.r_addend = relocation + rel->r_addend;
|
outrel.r_addend = relocation + rel->r_addend;
|
}
|
}
|
else
|
else
|
{
|
{
|
BFD_ASSERT (h->dynindx != -1);
|
BFD_ASSERT (h->dynindx != -1);
|
relocate = false;
|
relocate = false;
|
outrel.r_info = ELF32_R_INFO (h->dynindx, R_390_32);
|
outrel.r_info = ELF32_R_INFO (h->dynindx, R_390_32);
|
outrel.r_addend = relocation + rel->r_addend;
|
outrel.r_addend = relocation + rel->r_addend;
|
}
|
}
|
}
|
}
|
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
|
(((Elf32_External_Rela *)
|
(((Elf32_External_Rela *)
|
sreloc->contents)
|
sreloc->contents)
|
+ sreloc->reloc_count));
|
+ sreloc->reloc_count));
|
++sreloc->reloc_count;
|
++sreloc->reloc_count;
|
|
|
/* If this reloc is against an external symbol, we do
|
/* If this reloc is against an external symbol, we do
|
not want to fiddle with the addend. Otherwise, we
|
not want to fiddle with the addend. Otherwise, we
|
need to include the symbol value so that it becomes
|
need to include the symbol value so that it becomes
|
an addend for the dynamic reloc. */
|
an addend for the dynamic reloc. */
|
if (! relocate)
|
if (! relocate)
|
continue;
|
continue;
|
}
|
}
|
|
|
break;
|
break;
|
|
|
default:
|
default:
|
break;
|
break;
|
}
|
}
|
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
contents, rel->r_offset,
|
contents, rel->r_offset,
|
relocation, rel->r_addend);
|
relocation, rel->r_addend);
|
|
|
if (r != bfd_reloc_ok)
|
if (r != bfd_reloc_ok)
|
{
|
{
|
switch (r)
|
switch (r)
|
{
|
{
|
default:
|
default:
|
case bfd_reloc_outofrange:
|
case bfd_reloc_outofrange:
|
abort ();
|
abort ();
|
case bfd_reloc_overflow:
|
case bfd_reloc_overflow:
|
{
|
{
|
const char *name;
|
const char *name;
|
|
|
if (h != NULL)
|
if (h != NULL)
|
name = h->root.root.string;
|
name = h->root.root.string;
|
else
|
else
|
{
|
{
|
name = bfd_elf_string_from_elf_section (input_bfd,
|
name = bfd_elf_string_from_elf_section (input_bfd,
|
symtab_hdr->sh_link,
|
symtab_hdr->sh_link,
|
sym->st_name);
|
sym->st_name);
|
if (name == NULL)
|
if (name == NULL)
|
return false;
|
return false;
|
if (*name == '\0')
|
if (*name == '\0')
|
name = bfd_section_name (input_bfd, sec);
|
name = bfd_section_name (input_bfd, sec);
|
}
|
}
|
if (! ((*info->callbacks->reloc_overflow)
|
if (! ((*info->callbacks->reloc_overflow)
|
(info, name, howto->name, (bfd_vma) 0,
|
(info, name, howto->name, (bfd_vma) 0,
|
input_bfd, input_section, rel->r_offset)))
|
input_bfd, input_section, rel->r_offset)))
|
return false;
|
return false;
|
}
|
}
|
break;
|
break;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
return true;
|
return true;
|
}
|
}
|
|
|
/* Finish up dynamic symbol handling. We set the contents of various
|
/* Finish up dynamic symbol handling. We set the contents of various
|
dynamic sections here. */
|
dynamic sections here. */
|
|
|
static boolean
|
static boolean
|
elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
|
elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
|
bfd *output_bfd;
|
bfd *output_bfd;
|
struct bfd_link_info *info;
|
struct bfd_link_info *info;
|
struct elf_link_hash_entry *h;
|
struct elf_link_hash_entry *h;
|
Elf_Internal_Sym *sym;
|
Elf_Internal_Sym *sym;
|
{
|
{
|
bfd *dynobj;
|
bfd *dynobj;
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
dynobj = elf_hash_table (info)->dynobj;
|
|
|
if (h->plt.offset != (bfd_vma) -1)
|
if (h->plt.offset != (bfd_vma) -1)
|
{
|
{
|
asection *splt;
|
asection *splt;
|
asection *srela;
|
asection *srela;
|
Elf_Internal_Rela rela;
|
Elf_Internal_Rela rela;
|
bfd_vma relative_offset;
|
bfd_vma relative_offset;
|
bfd_vma got_offset;
|
bfd_vma got_offset;
|
bfd_vma plt_index;
|
bfd_vma plt_index;
|
asection *sgot;
|
asection *sgot;
|
|
|
/* This symbol has an entry in the procedure linkage table. Set
|
/* This symbol has an entry in the procedure linkage table. Set
|
it up. */
|
it up. */
|
|
|
BFD_ASSERT (h->dynindx != -1);
|
BFD_ASSERT (h->dynindx != -1);
|
|
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
srela = bfd_get_section_by_name (dynobj, ".rela.plt");
|
srela = bfd_get_section_by_name (dynobj, ".rela.plt");
|
BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
|
BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
|
|
|
/* Calc. index no.
|
/* Calc. index no.
|
Current offset - size first entry / entry size. */
|
Current offset - size first entry / entry size. */
|
plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
|
plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
|
|
|
/* Offset in GOT is PLT index plus GOT headers(3) times 4,
|
/* Offset in GOT is PLT index plus GOT headers(3) times 4,
|
addr & GOT addr. */
|
addr & GOT addr. */
|
got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
|
got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
|
|
|
/* S390 uses halfwords for relative branch calc! */
|
/* S390 uses halfwords for relative branch calc! */
|
relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
|
relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
|
(PLT_ENTRY_SIZE * plt_index) + 18)/2);
|
(PLT_ENTRY_SIZE * plt_index) + 18)/2);
|
/* If offset is > 32768, branch to a previous branch
|
/* If offset is > 32768, branch to a previous branch
|
390 can only handle +-64 K jumps. */
|
390 can only handle +-64 K jumps. */
|
if ( -32768 > (int)relative_offset )
|
if ( -32768 > (int)relative_offset )
|
relative_offset = -(((65536/PLT_ENTRY_SIZE-1)*PLT_ENTRY_SIZE)/2);
|
relative_offset = -(((65536/PLT_ENTRY_SIZE-1)*PLT_ENTRY_SIZE)/2);
|
|
|
/* Fill in the entry in the procedure linkage table. */
|
/* Fill in the entry in the procedure linkage table. */
|
if (!info->shared)
|
if (!info->shared)
|
{
|
{
|
bfd_put_32 (output_bfd, PLT_ENTRY_WORD0,
|
bfd_put_32 (output_bfd, PLT_ENTRY_WORD0,
|
splt->contents + h->plt.offset);
|
splt->contents + h->plt.offset);
|
bfd_put_32 (output_bfd, PLT_ENTRY_WORD1,
|
bfd_put_32 (output_bfd, PLT_ENTRY_WORD1,
|
splt->contents + h->plt.offset + 4);
|
splt->contents + h->plt.offset + 4);
|
bfd_put_32 (output_bfd, PLT_ENTRY_WORD2,
|
bfd_put_32 (output_bfd, PLT_ENTRY_WORD2,
|
splt->contents + h->plt.offset + 8);
|
splt->contents + h->plt.offset + 8);
|
bfd_put_32 (output_bfd, PLT_ENTRY_WORD3,
|
bfd_put_32 (output_bfd, PLT_ENTRY_WORD3,
|
splt->contents + h->plt.offset + 12);
|
splt->contents + h->plt.offset + 12);
|
bfd_put_32 (output_bfd, PLT_ENTRY_WORD4,
|
bfd_put_32 (output_bfd, PLT_ENTRY_WORD4,
|
splt->contents + h->plt.offset + 16);
|
splt->contents + h->plt.offset + 16);
|
bfd_put_32 (output_bfd, 0+(relative_offset << 16),
|
bfd_put_32 (output_bfd, 0+(relative_offset << 16),
|
splt->contents + h->plt.offset + 20);
|
splt->contents + h->plt.offset + 20);
|
bfd_put_32 (output_bfd,
|
bfd_put_32 (output_bfd,
|
(sgot->output_section->vma +
|
(sgot->output_section->vma +
|
sgot->output_offset +
|
sgot->output_offset +
|
got_offset),
|
got_offset),
|
splt->contents + h->plt.offset + 24);
|
splt->contents + h->plt.offset + 24);
|
}
|
}
|
else if (got_offset < 4096)
|
else if (got_offset < 4096)
|
{
|
{
|
bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD0 + got_offset,
|
bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD0 + got_offset,
|
splt->contents + h->plt.offset);
|
splt->contents + h->plt.offset);
|
bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD1,
|
bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD1,
|
splt->contents + h->plt.offset + 4);
|
splt->contents + h->plt.offset + 4);
|
bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD2,
|
bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD2,
|
splt->contents + h->plt.offset + 8);
|
splt->contents + h->plt.offset + 8);
|
bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD3,
|
bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD3,
|
splt->contents + h->plt.offset + 12);
|
splt->contents + h->plt.offset + 12);
|
bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD4,
|
bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD4,
|
splt->contents + h->plt.offset + 16);
|
splt->contents + h->plt.offset + 16);
|
bfd_put_32 (output_bfd, 0+(relative_offset << 16),
|
bfd_put_32 (output_bfd, 0+(relative_offset << 16),
|
splt->contents + h->plt.offset + 20);
|
splt->contents + h->plt.offset + 20);
|
bfd_put_32 (output_bfd, 0,
|
bfd_put_32 (output_bfd, 0,
|
splt->contents + h->plt.offset + 24);
|
splt->contents + h->plt.offset + 24);
|
}
|
}
|
else if (got_offset < 32768)
|
else if (got_offset < 32768)
|
{
|
{
|
bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD0 + got_offset,
|
bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD0 + got_offset,
|
splt->contents + h->plt.offset);
|
splt->contents + h->plt.offset);
|
bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD1,
|
bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD1,
|
splt->contents + h->plt.offset + 4);
|
splt->contents + h->plt.offset + 4);
|
bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD2,
|
bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD2,
|
splt->contents + h->plt.offset + 8);
|
splt->contents + h->plt.offset + 8);
|
bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD3,
|
bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD3,
|
splt->contents + h->plt.offset + 12);
|
splt->contents + h->plt.offset + 12);
|
bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD4,
|
bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD4,
|
splt->contents + h->plt.offset + 16);
|
splt->contents + h->plt.offset + 16);
|
bfd_put_32 (output_bfd, 0+(relative_offset << 16),
|
bfd_put_32 (output_bfd, 0+(relative_offset << 16),
|
splt->contents + h->plt.offset + 20);
|
splt->contents + h->plt.offset + 20);
|
bfd_put_32 (output_bfd, 0,
|
bfd_put_32 (output_bfd, 0,
|
splt->contents + h->plt.offset + 24);
|
splt->contents + h->plt.offset + 24);
|
}
|
}
|
else
|
else
|
{
|
{
|
bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD0,
|
bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD0,
|
splt->contents + h->plt.offset);
|
splt->contents + h->plt.offset);
|
bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD1,
|
bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD1,
|
splt->contents + h->plt.offset + 4);
|
splt->contents + h->plt.offset + 4);
|
bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD2,
|
bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD2,
|
splt->contents + h->plt.offset + 8);
|
splt->contents + h->plt.offset + 8);
|
bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD3,
|
bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD3,
|
splt->contents + h->plt.offset + 12);
|
splt->contents + h->plt.offset + 12);
|
bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD4,
|
bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD4,
|
splt->contents + h->plt.offset + 16);
|
splt->contents + h->plt.offset + 16);
|
bfd_put_32 (output_bfd, 0+(relative_offset << 16),
|
bfd_put_32 (output_bfd, 0+(relative_offset << 16),
|
splt->contents + h->plt.offset + 20);
|
splt->contents + h->plt.offset + 20);
|
bfd_put_32 (output_bfd, got_offset,
|
bfd_put_32 (output_bfd, got_offset,
|
splt->contents + h->plt.offset + 24);
|
splt->contents + h->plt.offset + 24);
|
}
|
}
|
/* Insert offset into reloc. table here. */
|
/* Insert offset into reloc. table here. */
|
bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
|
bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
|
splt->contents + h->plt.offset + 28);
|
splt->contents + h->plt.offset + 28);
|
/* Fill in the entry in the .rela.plt section. */
|
/* Fill in the entry in the .rela.plt section. */
|
rela.r_offset = (sgot->output_section->vma
|
rela.r_offset = (sgot->output_section->vma
|
+ sgot->output_offset
|
+ sgot->output_offset
|
+ got_offset);
|
+ got_offset);
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
|
rela.r_addend = 0;
|
rela.r_addend = 0;
|
bfd_elf32_swap_reloca_out (output_bfd, &rela,
|
bfd_elf32_swap_reloca_out (output_bfd, &rela,
|
((Elf32_External_Rela *) srela->contents
|
((Elf32_External_Rela *) srela->contents
|
+ plt_index ));
|
+ plt_index ));
|
|
|
/* Fill in the entry in the global offset table.
|
/* Fill in the entry in the global offset table.
|
Points to instruction after GOT offset. */
|
Points to instruction after GOT offset. */
|
bfd_put_32 (output_bfd,
|
bfd_put_32 (output_bfd,
|
(splt->output_section->vma
|
(splt->output_section->vma
|
+ splt->output_offset
|
+ splt->output_offset
|
+ h->plt.offset
|
+ h->plt.offset
|
+ 12),
|
+ 12),
|
sgot->contents + got_offset);
|
sgot->contents + got_offset);
|
|
|
|
|
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
{
|
{
|
/* Mark the symbol as undefined, rather than as defined in
|
/* Mark the symbol as undefined, rather than as defined in
|
the .plt section. Leave the value alone. */
|
the .plt section. Leave the value alone. */
|
sym->st_shndx = SHN_UNDEF;
|
sym->st_shndx = SHN_UNDEF;
|
}
|
}
|
}
|
}
|
|
|
if (h->got.offset != (bfd_vma) -1)
|
if (h->got.offset != (bfd_vma) -1)
|
{
|
{
|
asection *sgot;
|
asection *sgot;
|
asection *srela;
|
asection *srela;
|
Elf_Internal_Rela rela;
|
Elf_Internal_Rela rela;
|
|
|
/* This symbol has an entry in the global offset table. Set it
|
/* This symbol has an entry in the global offset table. Set it
|
up. */
|
up. */
|
|
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
sgot = bfd_get_section_by_name (dynobj, ".got");
|
srela = bfd_get_section_by_name (dynobj, ".rela.got");
|
srela = bfd_get_section_by_name (dynobj, ".rela.got");
|
BFD_ASSERT (sgot != NULL && srela != NULL);
|
BFD_ASSERT (sgot != NULL && srela != NULL);
|
|
|
rela.r_offset = (sgot->output_section->vma
|
rela.r_offset = (sgot->output_section->vma
|
+ sgot->output_offset
|
+ sgot->output_offset
|
+ (h->got.offset &~ 1));
|
+ (h->got.offset &~ 1));
|
|
|
/* If this is a static link, or it is a -Bsymbolic link and the
|
/* If this is a static link, or it is a -Bsymbolic link and the
|
symbol is defined locally or was forced to be local because
|
symbol is defined locally or was forced to be local because
|
of a version file, we just want to emit a RELATIVE reloc.
|
of a version file, we just want to emit a RELATIVE reloc.
|
The entry in the global offset table will already have been
|
The entry in the global offset table will already have been
|
initialized in the relocate_section function. */
|
initialized in the relocate_section function. */
|
if (! elf_hash_table (info)->dynamic_sections_created
|
if (! elf_hash_table (info)->dynamic_sections_created
|
|| (info->shared
|
|| (info->shared
|
&& (info->symbolic || h->dynindx == -1)
|
&& (info->symbolic || h->dynindx == -1)
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
|
{
|
{
|
rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
|
rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
|
rela.r_addend = (h->root.u.def.value
|
rela.r_addend = (h->root.u.def.value
|
+ h->root.u.def.section->output_section->vma
|
+ h->root.u.def.section->output_section->vma
|
+ h->root.u.def.section->output_offset);
|
+ h->root.u.def.section->output_offset);
|
}
|
}
|
else
|
else
|
{
|
{
|
BFD_ASSERT((h->got.offset & 1) == 0);
|
BFD_ASSERT((h->got.offset & 1) == 0);
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
|
rela.r_addend = 0;
|
rela.r_addend = 0;
|
}
|
}
|
|
|
bfd_elf32_swap_reloca_out (output_bfd, &rela,
|
bfd_elf32_swap_reloca_out (output_bfd, &rela,
|
((Elf32_External_Rela *) srela->contents
|
((Elf32_External_Rela *) srela->contents
|
+ srela->reloc_count));
|
+ srela->reloc_count));
|
++srela->reloc_count;
|
++srela->reloc_count;
|
}
|
}
|
|
|
if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
|
if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
|
{
|
{
|
asection *s;
|
asection *s;
|
Elf_Internal_Rela rela;
|
Elf_Internal_Rela rela;
|
|
|
/* This symbols needs a copy reloc. Set it up. */
|
/* This symbols needs a copy reloc. Set it up. */
|
|
|
BFD_ASSERT (h->dynindx != -1
|
BFD_ASSERT (h->dynindx != -1
|
&& (h->root.type == bfd_link_hash_defined
|
&& (h->root.type == bfd_link_hash_defined
|
|| h->root.type == bfd_link_hash_defweak));
|
|| h->root.type == bfd_link_hash_defweak));
|
|
|
|
|
s = bfd_get_section_by_name (h->root.u.def.section->owner,
|
s = bfd_get_section_by_name (h->root.u.def.section->owner,
|
".rela.bss");
|
".rela.bss");
|
BFD_ASSERT (s != NULL);
|
BFD_ASSERT (s != NULL);
|
|
|
rela.r_offset = (h->root.u.def.value
|
rela.r_offset = (h->root.u.def.value
|
+ h->root.u.def.section->output_section->vma
|
+ h->root.u.def.section->output_section->vma
|
+ h->root.u.def.section->output_offset);
|
+ h->root.u.def.section->output_offset);
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
|
rela.r_addend = 0;
|
rela.r_addend = 0;
|
bfd_elf32_swap_reloca_out (output_bfd, &rela,
|
bfd_elf32_swap_reloca_out (output_bfd, &rela,
|
((Elf32_External_Rela *) s->contents
|
((Elf32_External_Rela *) s->contents
|
+ s->reloc_count));
|
+ s->reloc_count));
|
++s->reloc_count;
|
++s->reloc_count;
|
}
|
}
|
|
|
/* Mark some specially defined symbols as absolute. */
|
/* Mark some specially defined symbols as absolute. */
|
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|
|| strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
|
|| strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
|
|| strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
|
|| strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
|
sym->st_shndx = SHN_ABS;
|
sym->st_shndx = SHN_ABS;
|
|
|
return true;
|
return true;
|
}
|
}
|
|
|
/* Finish up the dynamic sections. */
|
/* Finish up the dynamic sections. */
|
|
|
static boolean
|
static boolean
|
elf_s390_finish_dynamic_sections (output_bfd, info)
|
elf_s390_finish_dynamic_sections (output_bfd, info)
|
bfd *output_bfd;
|
bfd *output_bfd;
|
struct bfd_link_info *info;
|
struct bfd_link_info *info;
|
{
|
{
|
bfd *dynobj;
|
bfd *dynobj;
|
asection *sdyn;
|
asection *sdyn;
|
asection *sgot;
|
asection *sgot;
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
dynobj = elf_hash_table (info)->dynobj;
|
|
|
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
BFD_ASSERT (sgot != NULL);
|
BFD_ASSERT (sgot != NULL);
|
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
|
|
if (elf_hash_table (info)->dynamic_sections_created)
|
if (elf_hash_table (info)->dynamic_sections_created)
|
{
|
{
|
asection *splt;
|
asection *splt;
|
Elf32_External_Dyn *dyncon, *dynconend;
|
Elf32_External_Dyn *dyncon, *dynconend;
|
|
|
BFD_ASSERT (sdyn != NULL);
|
BFD_ASSERT (sdyn != NULL);
|
|
|
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
|
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
|
for (; dyncon < dynconend; dyncon++)
|
for (; dyncon < dynconend; dyncon++)
|
{
|
{
|
Elf_Internal_Dyn dyn;
|
Elf_Internal_Dyn dyn;
|
const char *name;
|
const char *name;
|
asection *s;
|
asection *s;
|
|
|
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
|
|
switch (dyn.d_tag)
|
switch (dyn.d_tag)
|
{
|
{
|
default:
|
default:
|
break;
|
break;
|
|
|
case DT_PLTGOT:
|
case DT_PLTGOT:
|
name = ".got";
|
name = ".got";
|
goto get_vma;
|
goto get_vma;
|
case DT_JMPREL:
|
case DT_JMPREL:
|
name = ".rela.plt";
|
name = ".rela.plt";
|
get_vma:
|
get_vma:
|
s = bfd_get_section_by_name(output_bfd, name);
|
s = bfd_get_section_by_name(output_bfd, name);
|
BFD_ASSERT (s != NULL);
|
BFD_ASSERT (s != NULL);
|
dyn.d_un.d_ptr = s->vma;
|
dyn.d_un.d_ptr = s->vma;
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
break;
|
break;
|
|
|
case DT_PLTRELSZ:
|
case DT_PLTRELSZ:
|
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
|
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
|
BFD_ASSERT (s != NULL);
|
BFD_ASSERT (s != NULL);
|
if (s->_cooked_size != 0)
|
if (s->_cooked_size != 0)
|
dyn.d_un.d_val = s->_cooked_size;
|
dyn.d_un.d_val = s->_cooked_size;
|
else
|
else
|
dyn.d_un.d_val = s->_raw_size;
|
dyn.d_un.d_val = s->_raw_size;
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
/* Fill in the special first entry in the procedure linkage table. */
|
/* Fill in the special first entry in the procedure linkage table. */
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
if (splt && splt->_raw_size > 0)
|
if (splt && splt->_raw_size > 0)
|
{
|
{
|
memset (splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
|
memset (splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
|
if (info->shared)
|
if (info->shared)
|
{
|
{
|
bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD0,
|
bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD0,
|
splt->contents );
|
splt->contents );
|
bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD1,
|
bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD1,
|
splt->contents +4 );
|
splt->contents +4 );
|
bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD2,
|
bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD2,
|
splt->contents +8 );
|
splt->contents +8 );
|
bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD3,
|
bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD3,
|
splt->contents +12 );
|
splt->contents +12 );
|
bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD4,
|
bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD4,
|
splt->contents +16 );
|
splt->contents +16 );
|
}
|
}
|
else
|
else
|
{
|
{
|
bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD0,
|
bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD0,
|
splt->contents );
|
splt->contents );
|
bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD1,
|
bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD1,
|
splt->contents +4 );
|
splt->contents +4 );
|
bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD2,
|
bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD2,
|
splt->contents +8 );
|
splt->contents +8 );
|
bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD3,
|
bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD3,
|
splt->contents +12 );
|
splt->contents +12 );
|
bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD4,
|
bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD4,
|
splt->contents +16 );
|
splt->contents +16 );
|
bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD5,
|
bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD5,
|
splt->contents +20 );
|
splt->contents +20 );
|
bfd_put_32 (output_bfd,
|
bfd_put_32 (output_bfd,
|
sgot->output_section->vma + sgot->output_offset,
|
sgot->output_section->vma + sgot->output_offset,
|
splt->contents + 24);
|
splt->contents + 24);
|
}
|
}
|
elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
|
elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
|
}
|
}
|
|
|
}
|
}
|
|
|
/* Set the first entry in the global offset table to the address of
|
/* Set the first entry in the global offset table to the address of
|
the dynamic section. */
|
the dynamic section. */
|
if (sgot->_raw_size > 0)
|
if (sgot->_raw_size > 0)
|
{
|
{
|
if (sdyn == NULL)
|
if (sdyn == NULL)
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
|
else
|
else
|
bfd_put_32 (output_bfd,
|
bfd_put_32 (output_bfd,
|
sdyn->output_section->vma + sdyn->output_offset,
|
sdyn->output_section->vma + sdyn->output_offset,
|
sgot->contents);
|
sgot->contents);
|
|
|
/* One entry for shared object struct ptr. */
|
/* One entry for shared object struct ptr. */
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
|
/* One entry for _dl_runtime_resolve. */
|
/* One entry for _dl_runtime_resolve. */
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
|
}
|
}
|
|
|
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
|
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
|
|
|
return true;
|
return true;
|
}
|
}
|
|
|
static boolean
|
static boolean
|
elf_s390_object_p (abfd)
|
elf_s390_object_p (abfd)
|
bfd *abfd;
|
bfd *abfd;
|
{
|
{
|
return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_esa);
|
return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_esa);
|
}
|
}
|
|
|
#define TARGET_BIG_SYM bfd_elf32_s390_vec
|
#define TARGET_BIG_SYM bfd_elf32_s390_vec
|
#define TARGET_BIG_NAME "elf32-s390"
|
#define TARGET_BIG_NAME "elf32-s390"
|
#define ELF_ARCH bfd_arch_s390
|
#define ELF_ARCH bfd_arch_s390
|
#define ELF_MACHINE_CODE EM_S390
|
#define ELF_MACHINE_CODE EM_S390
|
#define ELF_MACHINE_ALT1 EM_S390_OLD
|
#define ELF_MACHINE_ALT1 EM_S390_OLD
|
#define ELF_MAXPAGESIZE 0x1000
|
#define ELF_MAXPAGESIZE 0x1000
|
|
|
#define elf_backend_can_gc_sections 1
|
#define elf_backend_can_gc_sections 1
|
#define elf_backend_want_got_plt 1
|
#define elf_backend_want_got_plt 1
|
#define elf_backend_plt_readonly 1
|
#define elf_backend_plt_readonly 1
|
#define elf_backend_want_plt_sym 0
|
#define elf_backend_want_plt_sym 0
|
#define elf_backend_got_header_size 12
|
#define elf_backend_got_header_size 12
|
#define elf_backend_plt_header_size PLT_ENTRY_SIZE
|
#define elf_backend_plt_header_size PLT_ENTRY_SIZE
|
|
|
#define elf_info_to_howto elf_s390_info_to_howto
|
#define elf_info_to_howto elf_s390_info_to_howto
|
|
|
#define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
|
#define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
|
#define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
|
#define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
|
#define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
|
#define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
|
#define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
|
#define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
|
|
|
#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
|
#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
|
#define elf_backend_check_relocs elf_s390_check_relocs
|
#define elf_backend_check_relocs elf_s390_check_relocs
|
#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
|
#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
|
#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
|
#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
|
#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
|
#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
|
#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
|
#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
|
#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
|
#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
|
#define elf_backend_relocate_section elf_s390_relocate_section
|
#define elf_backend_relocate_section elf_s390_relocate_section
|
#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
|
#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
|
|
|
#define elf_backend_object_p elf_s390_object_p
|
#define elf_backend_object_p elf_s390_object_p
|
|
|
#include "elf32-target.h"
|
#include "elf32-target.h"
|
|
|
