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jeremybenn |
/* IBM S/390-specific support for 32-bit ELF
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Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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Free Software Foundation, Inc.
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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 program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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static reloc_howto_type *elf_s390_reloc_type_lookup
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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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PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
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static bfd_boolean elf_s390_is_local_label_name
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PARAMS ((bfd *, const char *));
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static struct bfd_hash_entry *link_hash_newfunc
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PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
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static struct bfd_link_hash_table *elf_s390_link_hash_table_create
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PARAMS ((bfd *));
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static bfd_boolean create_got_section
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PARAMS((bfd *, struct bfd_link_info *));
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static bfd_boolean elf_s390_create_dynamic_sections
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PARAMS((bfd *, struct bfd_link_info *));
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static void elf_s390_copy_indirect_symbol
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PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
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struct elf_link_hash_entry *));
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static bfd_boolean elf_s390_check_relocs
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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struct elf_s390_link_hash_entry;
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static void elf_s390_adjust_gotplt
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PARAMS ((struct elf_s390_link_hash_entry *));
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static bfd_boolean elf_s390_adjust_dynamic_symbol
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PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
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static bfd_boolean allocate_dynrelocs
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PARAMS ((struct elf_link_hash_entry *, PTR));
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static bfd_boolean readonly_dynrelocs
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PARAMS ((struct elf_link_hash_entry *, PTR));
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static bfd_boolean elf_s390_size_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static bfd_boolean elf_s390_relocate_section
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
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static bfd_boolean elf_s390_finish_dynamic_symbol
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PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
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Elf_Internal_Sym *));
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static enum elf_reloc_type_class elf_s390_reloc_type_class
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PARAMS ((const Elf_Internal_Rela *));
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static bfd_boolean elf_s390_finish_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static bfd_boolean elf_s390_object_p
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PARAMS ((bfd *));
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static bfd_boolean elf_s390_grok_prstatus
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PARAMS ((bfd *, Elf_Internal_Note *));
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static int elf_s390_tls_transition
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PARAMS ((struct bfd_link_info *, int, int));
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static bfd_reloc_status_type s390_tls_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_vma dtpoff_base
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PARAMS ((struct bfd_link_info *));
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static bfd_vma tpoff
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PARAMS ((struct bfd_link_info *, bfd_vma));
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static void invalid_tls_insn
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PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
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static bfd_reloc_status_type s390_elf_ldisp_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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#include "elf/s390.h"
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/* The relocation "howto" table. */
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static reloc_howto_type elf_howto_table[] =
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{
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HOWTO (R_390_NONE, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_390_NONE", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
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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,
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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,
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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,
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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,
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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_bitfield,
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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,
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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,
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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,
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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,
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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,
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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,
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bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
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HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
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HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
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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,
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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,
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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,
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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,
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bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
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HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
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EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
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EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
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EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
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EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
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HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
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EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
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HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
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bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
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HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
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HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
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HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
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HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
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HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
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s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
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HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
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s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
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HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
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s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
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HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
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HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
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bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
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HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
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HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
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HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
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EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
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HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
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HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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195 |
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bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
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196 |
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EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
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197 |
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HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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198 |
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bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
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199 |
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EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
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200 |
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HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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201 |
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bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
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202 |
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HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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203 |
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bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
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204 |
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HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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205 |
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bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
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206 |
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HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
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207 |
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s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
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208 |
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HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
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209 |
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s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
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210 |
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HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
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211 |
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s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
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212 |
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HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
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213 |
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s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
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214 |
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};
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215 |
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216 |
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/* GNU extension to record C++ vtable hierarchy. */
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217 |
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static reloc_howto_type elf32_s390_vtinherit_howto =
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218 |
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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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219 |
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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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221 |
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222 |
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static reloc_howto_type *
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223 |
|
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elf_s390_reloc_type_lookup (abfd, code)
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224 |
|
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bfd *abfd ATTRIBUTE_UNUSED;
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225 |
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bfd_reloc_code_real_type code;
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226 |
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{
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227 |
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switch (code)
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228 |
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{
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229 |
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case BFD_RELOC_NONE:
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return &elf_howto_table[(int) R_390_NONE];
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231 |
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case BFD_RELOC_8:
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232 |
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return &elf_howto_table[(int) R_390_8];
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233 |
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case BFD_RELOC_390_12:
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234 |
|
|
return &elf_howto_table[(int) R_390_12];
|
235 |
|
|
case BFD_RELOC_16:
|
236 |
|
|
return &elf_howto_table[(int) R_390_16];
|
237 |
|
|
case BFD_RELOC_32:
|
238 |
|
|
return &elf_howto_table[(int) R_390_32];
|
239 |
|
|
case BFD_RELOC_CTOR:
|
240 |
|
|
return &elf_howto_table[(int) R_390_32];
|
241 |
|
|
case BFD_RELOC_32_PCREL:
|
242 |
|
|
return &elf_howto_table[(int) R_390_PC32];
|
243 |
|
|
case BFD_RELOC_390_GOT12:
|
244 |
|
|
return &elf_howto_table[(int) R_390_GOT12];
|
245 |
|
|
case BFD_RELOC_32_GOT_PCREL:
|
246 |
|
|
return &elf_howto_table[(int) R_390_GOT32];
|
247 |
|
|
case BFD_RELOC_390_PLT32:
|
248 |
|
|
return &elf_howto_table[(int) R_390_PLT32];
|
249 |
|
|
case BFD_RELOC_390_COPY:
|
250 |
|
|
return &elf_howto_table[(int) R_390_COPY];
|
251 |
|
|
case BFD_RELOC_390_GLOB_DAT:
|
252 |
|
|
return &elf_howto_table[(int) R_390_GLOB_DAT];
|
253 |
|
|
case BFD_RELOC_390_JMP_SLOT:
|
254 |
|
|
return &elf_howto_table[(int) R_390_JMP_SLOT];
|
255 |
|
|
case BFD_RELOC_390_RELATIVE:
|
256 |
|
|
return &elf_howto_table[(int) R_390_RELATIVE];
|
257 |
|
|
case BFD_RELOC_32_GOTOFF:
|
258 |
|
|
return &elf_howto_table[(int) R_390_GOTOFF32];
|
259 |
|
|
case BFD_RELOC_390_GOTPC:
|
260 |
|
|
return &elf_howto_table[(int) R_390_GOTPC];
|
261 |
|
|
case BFD_RELOC_390_GOT16:
|
262 |
|
|
return &elf_howto_table[(int) R_390_GOT16];
|
263 |
|
|
case BFD_RELOC_16_PCREL:
|
264 |
|
|
return &elf_howto_table[(int) R_390_PC16];
|
265 |
|
|
case BFD_RELOC_390_PC16DBL:
|
266 |
|
|
return &elf_howto_table[(int) R_390_PC16DBL];
|
267 |
|
|
case BFD_RELOC_390_PLT16DBL:
|
268 |
|
|
return &elf_howto_table[(int) R_390_PLT16DBL];
|
269 |
|
|
case BFD_RELOC_390_PC32DBL:
|
270 |
|
|
return &elf_howto_table[(int) R_390_PC32DBL];
|
271 |
|
|
case BFD_RELOC_390_PLT32DBL:
|
272 |
|
|
return &elf_howto_table[(int) R_390_PLT32DBL];
|
273 |
|
|
case BFD_RELOC_390_GOTPCDBL:
|
274 |
|
|
return &elf_howto_table[(int) R_390_GOTPCDBL];
|
275 |
|
|
case BFD_RELOC_390_GOTENT:
|
276 |
|
|
return &elf_howto_table[(int) R_390_GOTENT];
|
277 |
|
|
case BFD_RELOC_16_GOTOFF:
|
278 |
|
|
return &elf_howto_table[(int) R_390_GOTOFF16];
|
279 |
|
|
case BFD_RELOC_390_GOTPLT12:
|
280 |
|
|
return &elf_howto_table[(int) R_390_GOTPLT12];
|
281 |
|
|
case BFD_RELOC_390_GOTPLT16:
|
282 |
|
|
return &elf_howto_table[(int) R_390_GOTPLT16];
|
283 |
|
|
case BFD_RELOC_390_GOTPLT32:
|
284 |
|
|
return &elf_howto_table[(int) R_390_GOTPLT32];
|
285 |
|
|
case BFD_RELOC_390_GOTPLTENT:
|
286 |
|
|
return &elf_howto_table[(int) R_390_GOTPLTENT];
|
287 |
|
|
case BFD_RELOC_390_PLTOFF16:
|
288 |
|
|
return &elf_howto_table[(int) R_390_PLTOFF16];
|
289 |
|
|
case BFD_RELOC_390_PLTOFF32:
|
290 |
|
|
return &elf_howto_table[(int) R_390_PLTOFF32];
|
291 |
|
|
case BFD_RELOC_390_TLS_LOAD:
|
292 |
|
|
return &elf_howto_table[(int) R_390_TLS_LOAD];
|
293 |
|
|
case BFD_RELOC_390_TLS_GDCALL:
|
294 |
|
|
return &elf_howto_table[(int) R_390_TLS_GDCALL];
|
295 |
|
|
case BFD_RELOC_390_TLS_LDCALL:
|
296 |
|
|
return &elf_howto_table[(int) R_390_TLS_LDCALL];
|
297 |
|
|
case BFD_RELOC_390_TLS_GD32:
|
298 |
|
|
return &elf_howto_table[(int) R_390_TLS_GD32];
|
299 |
|
|
case BFD_RELOC_390_TLS_GOTIE12:
|
300 |
|
|
return &elf_howto_table[(int) R_390_TLS_GOTIE12];
|
301 |
|
|
case BFD_RELOC_390_TLS_GOTIE32:
|
302 |
|
|
return &elf_howto_table[(int) R_390_TLS_GOTIE32];
|
303 |
|
|
case BFD_RELOC_390_TLS_LDM32:
|
304 |
|
|
return &elf_howto_table[(int) R_390_TLS_LDM32];
|
305 |
|
|
case BFD_RELOC_390_TLS_IE32:
|
306 |
|
|
return &elf_howto_table[(int) R_390_TLS_IE32];
|
307 |
|
|
case BFD_RELOC_390_TLS_IEENT:
|
308 |
|
|
return &elf_howto_table[(int) R_390_TLS_IEENT];
|
309 |
|
|
case BFD_RELOC_390_TLS_LE32:
|
310 |
|
|
return &elf_howto_table[(int) R_390_TLS_LE32];
|
311 |
|
|
case BFD_RELOC_390_TLS_LDO32:
|
312 |
|
|
return &elf_howto_table[(int) R_390_TLS_LDO32];
|
313 |
|
|
case BFD_RELOC_390_TLS_DTPMOD:
|
314 |
|
|
return &elf_howto_table[(int) R_390_TLS_DTPMOD];
|
315 |
|
|
case BFD_RELOC_390_TLS_DTPOFF:
|
316 |
|
|
return &elf_howto_table[(int) R_390_TLS_DTPOFF];
|
317 |
|
|
case BFD_RELOC_390_TLS_TPOFF:
|
318 |
|
|
return &elf_howto_table[(int) R_390_TLS_TPOFF];
|
319 |
|
|
case BFD_RELOC_390_20:
|
320 |
|
|
return &elf_howto_table[(int) R_390_20];
|
321 |
|
|
case BFD_RELOC_390_GOT20:
|
322 |
|
|
return &elf_howto_table[(int) R_390_GOT20];
|
323 |
|
|
case BFD_RELOC_390_GOTPLT20:
|
324 |
|
|
return &elf_howto_table[(int) R_390_GOTPLT20];
|
325 |
|
|
case BFD_RELOC_390_TLS_GOTIE20:
|
326 |
|
|
return &elf_howto_table[(int) R_390_TLS_GOTIE20];
|
327 |
|
|
case BFD_RELOC_VTABLE_INHERIT:
|
328 |
|
|
return &elf32_s390_vtinherit_howto;
|
329 |
|
|
case BFD_RELOC_VTABLE_ENTRY:
|
330 |
|
|
return &elf32_s390_vtentry_howto;
|
331 |
|
|
default:
|
332 |
|
|
break;
|
333 |
|
|
}
|
334 |
|
|
return 0;
|
335 |
|
|
}
|
336 |
|
|
|
337 |
|
|
static reloc_howto_type *
|
338 |
|
|
elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
339 |
|
|
const char *r_name)
|
340 |
|
|
{
|
341 |
|
|
unsigned int i;
|
342 |
|
|
|
343 |
|
|
for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
|
344 |
|
|
if (elf_howto_table[i].name != NULL
|
345 |
|
|
&& strcasecmp (elf_howto_table[i].name, r_name) == 0)
|
346 |
|
|
return &elf_howto_table[i];
|
347 |
|
|
|
348 |
|
|
if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
|
349 |
|
|
return &elf32_s390_vtinherit_howto;
|
350 |
|
|
if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
|
351 |
|
|
return &elf32_s390_vtentry_howto;
|
352 |
|
|
|
353 |
|
|
return NULL;
|
354 |
|
|
}
|
355 |
|
|
|
356 |
|
|
/* We need to use ELF32_R_TYPE so we have our own copy of this function,
|
357 |
|
|
and elf32-s390.c has its own copy. */
|
358 |
|
|
|
359 |
|
|
static void
|
360 |
|
|
elf_s390_info_to_howto (abfd, cache_ptr, dst)
|
361 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
362 |
|
|
arelent *cache_ptr;
|
363 |
|
|
Elf_Internal_Rela *dst;
|
364 |
|
|
{
|
365 |
|
|
unsigned int r_type = ELF32_R_TYPE(dst->r_info);
|
366 |
|
|
switch (r_type)
|
367 |
|
|
{
|
368 |
|
|
case R_390_GNU_VTINHERIT:
|
369 |
|
|
cache_ptr->howto = &elf32_s390_vtinherit_howto;
|
370 |
|
|
break;
|
371 |
|
|
|
372 |
|
|
case R_390_GNU_VTENTRY:
|
373 |
|
|
cache_ptr->howto = &elf32_s390_vtentry_howto;
|
374 |
|
|
break;
|
375 |
|
|
|
376 |
|
|
default:
|
377 |
|
|
if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
|
378 |
|
|
{
|
379 |
|
|
(*_bfd_error_handler) (_("%B: invalid relocation type %d"),
|
380 |
|
|
abfd, (int) r_type);
|
381 |
|
|
r_type = R_390_NONE;
|
382 |
|
|
}
|
383 |
|
|
cache_ptr->howto = &elf_howto_table[r_type];
|
384 |
|
|
}
|
385 |
|
|
}
|
386 |
|
|
|
387 |
|
|
/* A relocation function which doesn't do anything. */
|
388 |
|
|
static bfd_reloc_status_type
|
389 |
|
|
s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
|
390 |
|
|
output_bfd, error_message)
|
391 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
392 |
|
|
arelent *reloc_entry;
|
393 |
|
|
asymbol *symbol ATTRIBUTE_UNUSED;
|
394 |
|
|
PTR data ATTRIBUTE_UNUSED;
|
395 |
|
|
asection *input_section;
|
396 |
|
|
bfd *output_bfd;
|
397 |
|
|
char **error_message ATTRIBUTE_UNUSED;
|
398 |
|
|
{
|
399 |
|
|
if (output_bfd)
|
400 |
|
|
reloc_entry->address += input_section->output_offset;
|
401 |
|
|
return bfd_reloc_ok;
|
402 |
|
|
}
|
403 |
|
|
|
404 |
|
|
/* Handle the large displacement relocs. */
|
405 |
|
|
static bfd_reloc_status_type
|
406 |
|
|
s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
|
407 |
|
|
output_bfd, error_message)
|
408 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
409 |
|
|
arelent *reloc_entry;
|
410 |
|
|
asymbol *symbol;
|
411 |
|
|
PTR data ATTRIBUTE_UNUSED;
|
412 |
|
|
asection *input_section;
|
413 |
|
|
bfd *output_bfd;
|
414 |
|
|
char **error_message ATTRIBUTE_UNUSED;
|
415 |
|
|
{
|
416 |
|
|
reloc_howto_type *howto = reloc_entry->howto;
|
417 |
|
|
bfd_vma relocation;
|
418 |
|
|
bfd_vma insn;
|
419 |
|
|
|
420 |
|
|
if (output_bfd != (bfd *) NULL
|
421 |
|
|
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
422 |
|
|
&& (! howto->partial_inplace
|
423 |
|
|
|| reloc_entry->addend == 0))
|
424 |
|
|
{
|
425 |
|
|
reloc_entry->address += input_section->output_offset;
|
426 |
|
|
return bfd_reloc_ok;
|
427 |
|
|
}
|
428 |
|
|
|
429 |
|
|
if (output_bfd != NULL)
|
430 |
|
|
return bfd_reloc_continue;
|
431 |
|
|
|
432 |
|
|
if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
|
433 |
|
|
return bfd_reloc_outofrange;
|
434 |
|
|
|
435 |
|
|
relocation = (symbol->value
|
436 |
|
|
+ symbol->section->output_section->vma
|
437 |
|
|
+ symbol->section->output_offset);
|
438 |
|
|
relocation += reloc_entry->addend;
|
439 |
|
|
if (howto->pc_relative)
|
440 |
|
|
{
|
441 |
|
|
relocation -= (input_section->output_section->vma
|
442 |
|
|
+ input_section->output_offset);
|
443 |
|
|
relocation -= reloc_entry->address;
|
444 |
|
|
}
|
445 |
|
|
|
446 |
|
|
insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
|
447 |
|
|
insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
|
448 |
|
|
bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
|
449 |
|
|
|
450 |
|
|
if ((bfd_signed_vma) relocation < - 0x80000
|
451 |
|
|
|| (bfd_signed_vma) relocation > 0x7ffff)
|
452 |
|
|
return bfd_reloc_overflow;
|
453 |
|
|
else
|
454 |
|
|
return bfd_reloc_ok;
|
455 |
|
|
}
|
456 |
|
|
|
457 |
|
|
static bfd_boolean
|
458 |
|
|
elf_s390_is_local_label_name (abfd, name)
|
459 |
|
|
bfd *abfd;
|
460 |
|
|
const char *name;
|
461 |
|
|
{
|
462 |
|
|
if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
|
463 |
|
|
return TRUE;
|
464 |
|
|
|
465 |
|
|
return _bfd_elf_is_local_label_name (abfd, name);
|
466 |
|
|
}
|
467 |
|
|
|
468 |
|
|
/* Functions for the 390 ELF linker. */
|
469 |
|
|
|
470 |
|
|
/* The name of the dynamic interpreter. This is put in the .interp
|
471 |
|
|
section. */
|
472 |
|
|
|
473 |
|
|
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
|
474 |
|
|
|
475 |
|
|
/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
|
476 |
|
|
copying dynamic variables from a shared lib into an app's dynbss
|
477 |
|
|
section, and instead use a dynamic relocation to point into the
|
478 |
|
|
shared lib. */
|
479 |
|
|
#define ELIMINATE_COPY_RELOCS 1
|
480 |
|
|
|
481 |
|
|
/* The size in bytes of the first entry in the procedure linkage table. */
|
482 |
|
|
#define PLT_FIRST_ENTRY_SIZE 32
|
483 |
|
|
/* The size in bytes of an entry in the procedure linkage table. */
|
484 |
|
|
#define PLT_ENTRY_SIZE 32
|
485 |
|
|
|
486 |
|
|
#define GOT_ENTRY_SIZE 4
|
487 |
|
|
|
488 |
|
|
/* The first three entries in a procedure linkage table are reserved,
|
489 |
|
|
and the initial contents are unimportant (we zero them out).
|
490 |
|
|
Subsequent entries look like this. See the SVR4 ABI 386
|
491 |
|
|
supplement to see how this works. */
|
492 |
|
|
|
493 |
|
|
/* For the s390, simple addr offset can only be 0 - 4096.
|
494 |
|
|
To use the full 2 GB address space, several instructions
|
495 |
|
|
are needed to load an address in a register and execute
|
496 |
|
|
a branch( or just saving the address)
|
497 |
|
|
|
498 |
|
|
Furthermore, only r 0 and 1 are free to use!!! */
|
499 |
|
|
|
500 |
|
|
/* The first 3 words in the GOT are then reserved.
|
501 |
|
|
Word 0 is the address of the dynamic table.
|
502 |
|
|
Word 1 is a pointer to a structure describing the object
|
503 |
|
|
Word 2 is used to point to the loader entry address.
|
504 |
|
|
|
505 |
|
|
The code for position independent PLT entries looks like this:
|
506 |
|
|
|
507 |
|
|
r12 holds addr of the current GOT at entry to the PLT
|
508 |
|
|
|
509 |
|
|
The GOT holds the address in the PLT to be executed.
|
510 |
|
|
The loader then gets:
|
511 |
|
|
24(15) = Pointer to the structure describing the object.
|
512 |
|
|
28(15) = Offset in symbol table
|
513 |
|
|
|
514 |
|
|
The loader must then find the module where the function is
|
515 |
|
|
and insert the address in the GOT.
|
516 |
|
|
|
517 |
|
|
Note: 390 can only address +- 64 K relative.
|
518 |
|
|
We check if offset > 65536, then make a relative branch -64xxx
|
519 |
|
|
back to a previous defined branch
|
520 |
|
|
|
521 |
|
|
PLT1: BASR 1,0 # 2 bytes
|
522 |
|
|
L 1,22(1) # 4 bytes Load offset in GOT in r 1
|
523 |
|
|
L 1,(1,12) # 4 bytes Load address from GOT in r1
|
524 |
|
|
BCR 15,1 # 2 bytes Jump to address
|
525 |
|
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
526 |
|
|
L 1,14(1) # 4 bytes Load offset in symol table in r1
|
527 |
|
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
528 |
|
|
.word 0 # 2 bytes filler
|
529 |
|
|
.long ? # 4 bytes offset in GOT
|
530 |
|
|
.long ? # 4 bytes offset into symbol table
|
531 |
|
|
|
532 |
|
|
This was the general case. There are two additional, optimizes PLT
|
533 |
|
|
definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
|
534 |
|
|
First the one for GOT offsets < 4096:
|
535 |
|
|
|
536 |
|
|
PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
|
537 |
|
|
BCR 15,1 # 2 bytes Jump to address
|
538 |
|
|
.word 0,0,0 # 6 bytes filler
|
539 |
|
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
540 |
|
|
L 1,14(1) # 4 bytes Load offset in symbol table in r1
|
541 |
|
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
542 |
|
|
.word 0,0,0 # 6 bytes filler
|
543 |
|
|
.long ? # 4 bytes offset into symbol table
|
544 |
|
|
|
545 |
|
|
Second the one for GOT offsets < 32768:
|
546 |
|
|
|
547 |
|
|
PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
|
548 |
|
|
L 1,(1,12) # 4 bytes Load address from GOT to r1
|
549 |
|
|
BCR 15,1 # 2 bytes Jump to address
|
550 |
|
|
.word 0 # 2 bytes filler
|
551 |
|
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
552 |
|
|
L 1,14(1) # 4 bytes Load offset in symbol table in r1
|
553 |
|
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
554 |
|
|
.word 0,0,0 # 6 bytes filler
|
555 |
|
|
.long ? # 4 bytes offset into symbol table
|
556 |
|
|
|
557 |
|
|
Total = 32 bytes per PLT entry
|
558 |
|
|
|
559 |
|
|
The code for static build PLT entries looks like this:
|
560 |
|
|
|
561 |
|
|
PLT1: BASR 1,0 # 2 bytes
|
562 |
|
|
L 1,22(1) # 4 bytes Load address of GOT entry
|
563 |
|
|
L 1,0(0,1) # 4 bytes Load address from GOT in r1
|
564 |
|
|
BCR 15,1 # 2 bytes Jump to address
|
565 |
|
|
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
566 |
|
|
L 1,14(1) # 4 bytes Load offset in symbol table in r1
|
567 |
|
|
BRC 15,-x # 4 bytes Jump to start of PLT
|
568 |
|
|
.word 0 # 2 bytes filler
|
569 |
|
|
.long ? # 4 bytes address of GOT entry
|
570 |
|
|
.long ? # 4 bytes offset into symbol table */
|
571 |
|
|
|
572 |
|
|
#define PLT_PIC_ENTRY_WORD0 0x0d105810
|
573 |
|
|
#define PLT_PIC_ENTRY_WORD1 0x10165811
|
574 |
|
|
#define PLT_PIC_ENTRY_WORD2 0xc00007f1
|
575 |
|
|
#define PLT_PIC_ENTRY_WORD3 0x0d105810
|
576 |
|
|
#define PLT_PIC_ENTRY_WORD4 0x100ea7f4
|
577 |
|
|
|
578 |
|
|
#define PLT_PIC12_ENTRY_WORD0 0x5810c000
|
579 |
|
|
#define PLT_PIC12_ENTRY_WORD1 0x07f10000
|
580 |
|
|
#define PLT_PIC12_ENTRY_WORD2 0x00000000
|
581 |
|
|
#define PLT_PIC12_ENTRY_WORD3 0x0d105810
|
582 |
|
|
#define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
|
583 |
|
|
|
584 |
|
|
#define PLT_PIC16_ENTRY_WORD0 0xa7180000
|
585 |
|
|
#define PLT_PIC16_ENTRY_WORD1 0x5811c000
|
586 |
|
|
#define PLT_PIC16_ENTRY_WORD2 0x07f10000
|
587 |
|
|
#define PLT_PIC16_ENTRY_WORD3 0x0d105810
|
588 |
|
|
#define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
|
589 |
|
|
|
590 |
|
|
#define PLT_ENTRY_WORD0 0x0d105810
|
591 |
|
|
#define PLT_ENTRY_WORD1 0x10165810
|
592 |
|
|
#define PLT_ENTRY_WORD2 0x100007f1
|
593 |
|
|
#define PLT_ENTRY_WORD3 0x0d105810
|
594 |
|
|
#define PLT_ENTRY_WORD4 0x100ea7f4
|
595 |
|
|
|
596 |
|
|
/* The first PLT entry pushes the offset into the symbol table
|
597 |
|
|
from R1 onto the stack at 8(15) and the loader object info
|
598 |
|
|
at 12(15), loads the loader address in R1 and jumps to it. */
|
599 |
|
|
|
600 |
|
|
/* The first entry in the PLT for PIC code:
|
601 |
|
|
|
602 |
|
|
PLT0:
|
603 |
|
|
ST 1,28(15) # R1 has offset into symbol table
|
604 |
|
|
L 1,4(12) # Get loader ino(object struct address)
|
605 |
|
|
ST 1,24(15) # Store address
|
606 |
|
|
L 1,8(12) # Entry address of loader in R1
|
607 |
|
|
BR 1 # Jump to loader
|
608 |
|
|
|
609 |
|
|
The first entry in the PLT for static code:
|
610 |
|
|
|
611 |
|
|
PLT0:
|
612 |
|
|
ST 1,28(15) # R1 has offset into symbol table
|
613 |
|
|
BASR 1,0
|
614 |
|
|
L 1,18(0,1) # Get address of GOT
|
615 |
|
|
MVC 24(4,15),4(1) # Move loader ino to stack
|
616 |
|
|
L 1,8(1) # Get address of loader
|
617 |
|
|
BR 1 # Jump to loader
|
618 |
|
|
.word 0 # filler
|
619 |
|
|
.long got # address of GOT */
|
620 |
|
|
|
621 |
|
|
#define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
|
622 |
|
|
#define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
|
623 |
|
|
#define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
|
624 |
|
|
#define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
|
625 |
|
|
#define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
|
626 |
|
|
|
627 |
|
|
#define PLT_FIRST_ENTRY_WORD0 0x5010f01c
|
628 |
|
|
#define PLT_FIRST_ENTRY_WORD1 0x0d105810
|
629 |
|
|
#define PLT_FIRST_ENTRY_WORD2 0x1012D203
|
630 |
|
|
#define PLT_FIRST_ENTRY_WORD3 0xf0181004
|
631 |
|
|
#define PLT_FIRST_ENTRY_WORD4 0x58101008
|
632 |
|
|
#define PLT_FIRST_ENTRY_WORD5 0x07f10000
|
633 |
|
|
|
634 |
|
|
/* The s390 linker needs to keep track of the number of relocs that it
|
635 |
|
|
decides to copy as dynamic relocs in check_relocs for each symbol.
|
636 |
|
|
This is so that it can later discard them if they are found to be
|
637 |
|
|
unnecessary. We store the information in a field extending the
|
638 |
|
|
regular ELF linker hash table. */
|
639 |
|
|
|
640 |
|
|
struct elf_s390_dyn_relocs
|
641 |
|
|
{
|
642 |
|
|
struct elf_s390_dyn_relocs *next;
|
643 |
|
|
|
644 |
|
|
/* The input section of the reloc. */
|
645 |
|
|
asection *sec;
|
646 |
|
|
|
647 |
|
|
/* Total number of relocs copied for the input section. */
|
648 |
|
|
bfd_size_type count;
|
649 |
|
|
|
650 |
|
|
/* Number of pc-relative relocs copied for the input section. */
|
651 |
|
|
bfd_size_type pc_count;
|
652 |
|
|
};
|
653 |
|
|
|
654 |
|
|
/* s390 ELF linker hash entry. */
|
655 |
|
|
|
656 |
|
|
struct elf_s390_link_hash_entry
|
657 |
|
|
{
|
658 |
|
|
struct elf_link_hash_entry elf;
|
659 |
|
|
|
660 |
|
|
/* Track dynamic relocs copied for this symbol. */
|
661 |
|
|
struct elf_s390_dyn_relocs *dyn_relocs;
|
662 |
|
|
|
663 |
|
|
/* Number of GOTPLT references for a function. */
|
664 |
|
|
bfd_signed_vma gotplt_refcount;
|
665 |
|
|
|
666 |
|
|
#define GOT_UNKNOWN 0
|
667 |
|
|
#define GOT_NORMAL 1
|
668 |
|
|
#define GOT_TLS_GD 2
|
669 |
|
|
#define GOT_TLS_IE 3
|
670 |
|
|
#define GOT_TLS_IE_NLT 4
|
671 |
|
|
unsigned char tls_type;
|
672 |
|
|
};
|
673 |
|
|
|
674 |
|
|
#define elf_s390_hash_entry(ent) \
|
675 |
|
|
((struct elf_s390_link_hash_entry *)(ent))
|
676 |
|
|
|
677 |
|
|
/* NOTE: Keep this structure in sync with
|
678 |
|
|
the one declared in elf64-s390.c. */
|
679 |
|
|
struct elf_s390_obj_tdata
|
680 |
|
|
{
|
681 |
|
|
struct elf_obj_tdata root;
|
682 |
|
|
|
683 |
|
|
/* TLS type for each local got entry. */
|
684 |
|
|
char *local_got_tls_type;
|
685 |
|
|
};
|
686 |
|
|
|
687 |
|
|
#define elf_s390_tdata(abfd) \
|
688 |
|
|
((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
|
689 |
|
|
|
690 |
|
|
#define elf_s390_local_got_tls_type(abfd) \
|
691 |
|
|
(elf_s390_tdata (abfd)->local_got_tls_type)
|
692 |
|
|
|
693 |
|
|
#define is_s390_elf(bfd) \
|
694 |
|
|
(bfd_get_flavour (bfd) == bfd_target_elf_flavour \
|
695 |
|
|
&& elf_tdata (bfd) != NULL \
|
696 |
|
|
&& elf_object_id (bfd) == S390_ELF_TDATA)
|
697 |
|
|
|
698 |
|
|
static bfd_boolean
|
699 |
|
|
elf_s390_mkobject (bfd *abfd)
|
700 |
|
|
{
|
701 |
|
|
return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
|
702 |
|
|
S390_ELF_TDATA);
|
703 |
|
|
}
|
704 |
|
|
|
705 |
|
|
static bfd_boolean
|
706 |
|
|
elf_s390_object_p (abfd)
|
707 |
|
|
bfd *abfd;
|
708 |
|
|
{
|
709 |
|
|
/* Set the right machine number for an s390 elf32 file. */
|
710 |
|
|
return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
|
711 |
|
|
}
|
712 |
|
|
|
713 |
|
|
/* s390 ELF linker hash table. */
|
714 |
|
|
|
715 |
|
|
struct elf_s390_link_hash_table
|
716 |
|
|
{
|
717 |
|
|
struct elf_link_hash_table elf;
|
718 |
|
|
|
719 |
|
|
/* Short-cuts to get to dynamic linker sections. */
|
720 |
|
|
asection *sgot;
|
721 |
|
|
asection *sgotplt;
|
722 |
|
|
asection *srelgot;
|
723 |
|
|
asection *splt;
|
724 |
|
|
asection *srelplt;
|
725 |
|
|
asection *sdynbss;
|
726 |
|
|
asection *srelbss;
|
727 |
|
|
|
728 |
|
|
union {
|
729 |
|
|
bfd_signed_vma refcount;
|
730 |
|
|
bfd_vma offset;
|
731 |
|
|
} tls_ldm_got;
|
732 |
|
|
|
733 |
|
|
/* Small local sym to section mapping cache. */
|
734 |
|
|
struct sym_sec_cache sym_sec;
|
735 |
|
|
};
|
736 |
|
|
|
737 |
|
|
/* Get the s390 ELF linker hash table from a link_info structure. */
|
738 |
|
|
|
739 |
|
|
#define elf_s390_hash_table(p) \
|
740 |
|
|
((struct elf_s390_link_hash_table *) ((p)->hash))
|
741 |
|
|
|
742 |
|
|
/* Create an entry in an s390 ELF linker hash table. */
|
743 |
|
|
|
744 |
|
|
static struct bfd_hash_entry *
|
745 |
|
|
link_hash_newfunc (entry, table, string)
|
746 |
|
|
struct bfd_hash_entry *entry;
|
747 |
|
|
struct bfd_hash_table *table;
|
748 |
|
|
const char *string;
|
749 |
|
|
{
|
750 |
|
|
/* Allocate the structure if it has not already been allocated by a
|
751 |
|
|
subclass. */
|
752 |
|
|
if (entry == NULL)
|
753 |
|
|
{
|
754 |
|
|
entry = bfd_hash_allocate (table,
|
755 |
|
|
sizeof (struct elf_s390_link_hash_entry));
|
756 |
|
|
if (entry == NULL)
|
757 |
|
|
return entry;
|
758 |
|
|
}
|
759 |
|
|
|
760 |
|
|
/* Call the allocation method of the superclass. */
|
761 |
|
|
entry = _bfd_elf_link_hash_newfunc (entry, table, string);
|
762 |
|
|
if (entry != NULL)
|
763 |
|
|
{
|
764 |
|
|
struct elf_s390_link_hash_entry *eh;
|
765 |
|
|
|
766 |
|
|
eh = (struct elf_s390_link_hash_entry *) entry;
|
767 |
|
|
eh->dyn_relocs = NULL;
|
768 |
|
|
eh->gotplt_refcount = 0;
|
769 |
|
|
eh->tls_type = GOT_UNKNOWN;
|
770 |
|
|
}
|
771 |
|
|
|
772 |
|
|
return entry;
|
773 |
|
|
}
|
774 |
|
|
|
775 |
|
|
/* Create an s390 ELF linker hash table. */
|
776 |
|
|
|
777 |
|
|
static struct bfd_link_hash_table *
|
778 |
|
|
elf_s390_link_hash_table_create (abfd)
|
779 |
|
|
bfd *abfd;
|
780 |
|
|
{
|
781 |
|
|
struct elf_s390_link_hash_table *ret;
|
782 |
|
|
bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
|
783 |
|
|
|
784 |
|
|
ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
|
785 |
|
|
if (ret == NULL)
|
786 |
|
|
return NULL;
|
787 |
|
|
|
788 |
|
|
if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
|
789 |
|
|
sizeof (struct elf_s390_link_hash_entry)))
|
790 |
|
|
{
|
791 |
|
|
free (ret);
|
792 |
|
|
return NULL;
|
793 |
|
|
}
|
794 |
|
|
|
795 |
|
|
ret->sgot = NULL;
|
796 |
|
|
ret->sgotplt = NULL;
|
797 |
|
|
ret->srelgot = NULL;
|
798 |
|
|
ret->splt = NULL;
|
799 |
|
|
ret->srelplt = NULL;
|
800 |
|
|
ret->sdynbss = NULL;
|
801 |
|
|
ret->srelbss = NULL;
|
802 |
|
|
ret->tls_ldm_got.refcount = 0;
|
803 |
|
|
ret->sym_sec.abfd = NULL;
|
804 |
|
|
|
805 |
|
|
return &ret->elf.root;
|
806 |
|
|
}
|
807 |
|
|
|
808 |
|
|
/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
|
809 |
|
|
shortcuts to them in our hash table. */
|
810 |
|
|
|
811 |
|
|
static bfd_boolean
|
812 |
|
|
create_got_section (dynobj, info)
|
813 |
|
|
bfd *dynobj;
|
814 |
|
|
struct bfd_link_info *info;
|
815 |
|
|
{
|
816 |
|
|
struct elf_s390_link_hash_table *htab;
|
817 |
|
|
|
818 |
|
|
if (! _bfd_elf_create_got_section (dynobj, info))
|
819 |
|
|
return FALSE;
|
820 |
|
|
|
821 |
|
|
htab = elf_s390_hash_table (info);
|
822 |
|
|
htab->sgot = bfd_get_section_by_name (dynobj, ".got");
|
823 |
|
|
htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
|
824 |
|
|
if (!htab->sgot || !htab->sgotplt)
|
825 |
|
|
abort ();
|
826 |
|
|
|
827 |
|
|
htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
|
828 |
|
|
(SEC_ALLOC | SEC_LOAD
|
829 |
|
|
| SEC_HAS_CONTENTS
|
830 |
|
|
| SEC_IN_MEMORY
|
831 |
|
|
| SEC_LINKER_CREATED
|
832 |
|
|
| SEC_READONLY));
|
833 |
|
|
if (htab->srelgot == NULL
|
834 |
|
|
|| ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
|
835 |
|
|
return FALSE;
|
836 |
|
|
return TRUE;
|
837 |
|
|
}
|
838 |
|
|
|
839 |
|
|
/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
|
840 |
|
|
.rela.bss sections in DYNOBJ, and set up shortcuts to them in our
|
841 |
|
|
hash table. */
|
842 |
|
|
|
843 |
|
|
static bfd_boolean
|
844 |
|
|
elf_s390_create_dynamic_sections (dynobj, info)
|
845 |
|
|
bfd *dynobj;
|
846 |
|
|
struct bfd_link_info *info;
|
847 |
|
|
{
|
848 |
|
|
struct elf_s390_link_hash_table *htab;
|
849 |
|
|
|
850 |
|
|
htab = elf_s390_hash_table (info);
|
851 |
|
|
if (!htab->sgot && !create_got_section (dynobj, info))
|
852 |
|
|
return FALSE;
|
853 |
|
|
|
854 |
|
|
if (!_bfd_elf_create_dynamic_sections (dynobj, info))
|
855 |
|
|
return FALSE;
|
856 |
|
|
|
857 |
|
|
htab->splt = bfd_get_section_by_name (dynobj, ".plt");
|
858 |
|
|
htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
|
859 |
|
|
htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
|
860 |
|
|
if (!info->shared)
|
861 |
|
|
htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
|
862 |
|
|
|
863 |
|
|
if (!htab->splt || !htab->srelplt || !htab->sdynbss
|
864 |
|
|
|| (!info->shared && !htab->srelbss))
|
865 |
|
|
abort ();
|
866 |
|
|
|
867 |
|
|
return TRUE;
|
868 |
|
|
}
|
869 |
|
|
|
870 |
|
|
/* Copy the extra info we tack onto an elf_link_hash_entry. */
|
871 |
|
|
|
872 |
|
|
static void
|
873 |
|
|
elf_s390_copy_indirect_symbol (info, dir, ind)
|
874 |
|
|
struct bfd_link_info *info;
|
875 |
|
|
struct elf_link_hash_entry *dir, *ind;
|
876 |
|
|
{
|
877 |
|
|
struct elf_s390_link_hash_entry *edir, *eind;
|
878 |
|
|
|
879 |
|
|
edir = (struct elf_s390_link_hash_entry *) dir;
|
880 |
|
|
eind = (struct elf_s390_link_hash_entry *) ind;
|
881 |
|
|
|
882 |
|
|
if (eind->dyn_relocs != NULL)
|
883 |
|
|
{
|
884 |
|
|
if (edir->dyn_relocs != NULL)
|
885 |
|
|
{
|
886 |
|
|
struct elf_s390_dyn_relocs **pp;
|
887 |
|
|
struct elf_s390_dyn_relocs *p;
|
888 |
|
|
|
889 |
|
|
/* Add reloc counts against the indirect sym to the direct sym
|
890 |
|
|
list. Merge any entries against the same section. */
|
891 |
|
|
for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
|
892 |
|
|
{
|
893 |
|
|
struct elf_s390_dyn_relocs *q;
|
894 |
|
|
|
895 |
|
|
for (q = edir->dyn_relocs; q != NULL; q = q->next)
|
896 |
|
|
if (q->sec == p->sec)
|
897 |
|
|
{
|
898 |
|
|
q->pc_count += p->pc_count;
|
899 |
|
|
q->count += p->count;
|
900 |
|
|
*pp = p->next;
|
901 |
|
|
break;
|
902 |
|
|
}
|
903 |
|
|
if (q == NULL)
|
904 |
|
|
pp = &p->next;
|
905 |
|
|
}
|
906 |
|
|
*pp = edir->dyn_relocs;
|
907 |
|
|
}
|
908 |
|
|
|
909 |
|
|
edir->dyn_relocs = eind->dyn_relocs;
|
910 |
|
|
eind->dyn_relocs = NULL;
|
911 |
|
|
}
|
912 |
|
|
|
913 |
|
|
if (ind->root.type == bfd_link_hash_indirect
|
914 |
|
|
&& dir->got.refcount <= 0)
|
915 |
|
|
{
|
916 |
|
|
edir->tls_type = eind->tls_type;
|
917 |
|
|
eind->tls_type = GOT_UNKNOWN;
|
918 |
|
|
}
|
919 |
|
|
|
920 |
|
|
if (ELIMINATE_COPY_RELOCS
|
921 |
|
|
&& ind->root.type != bfd_link_hash_indirect
|
922 |
|
|
&& dir->dynamic_adjusted)
|
923 |
|
|
{
|
924 |
|
|
/* If called to transfer flags for a weakdef during processing
|
925 |
|
|
of elf_adjust_dynamic_symbol, don't copy non_got_ref.
|
926 |
|
|
We clear it ourselves for ELIMINATE_COPY_RELOCS. */
|
927 |
|
|
dir->ref_dynamic |= ind->ref_dynamic;
|
928 |
|
|
dir->ref_regular |= ind->ref_regular;
|
929 |
|
|
dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
|
930 |
|
|
dir->needs_plt |= ind->needs_plt;
|
931 |
|
|
}
|
932 |
|
|
else
|
933 |
|
|
_bfd_elf_link_hash_copy_indirect (info, dir, ind);
|
934 |
|
|
}
|
935 |
|
|
|
936 |
|
|
static int
|
937 |
|
|
elf_s390_tls_transition (info, r_type, is_local)
|
938 |
|
|
struct bfd_link_info *info;
|
939 |
|
|
int r_type;
|
940 |
|
|
int is_local;
|
941 |
|
|
{
|
942 |
|
|
if (info->shared)
|
943 |
|
|
return r_type;
|
944 |
|
|
|
945 |
|
|
switch (r_type)
|
946 |
|
|
{
|
947 |
|
|
case R_390_TLS_GD32:
|
948 |
|
|
case R_390_TLS_IE32:
|
949 |
|
|
if (is_local)
|
950 |
|
|
return R_390_TLS_LE32;
|
951 |
|
|
return R_390_TLS_IE32;
|
952 |
|
|
case R_390_TLS_GOTIE32:
|
953 |
|
|
if (is_local)
|
954 |
|
|
return R_390_TLS_LE32;
|
955 |
|
|
return R_390_TLS_GOTIE32;
|
956 |
|
|
case R_390_TLS_LDM32:
|
957 |
|
|
return R_390_TLS_LE32;
|
958 |
|
|
}
|
959 |
|
|
|
960 |
|
|
return r_type;
|
961 |
|
|
}
|
962 |
|
|
|
963 |
|
|
/* Look through the relocs for a section during the first phase, and
|
964 |
|
|
allocate space in the global offset table or procedure linkage
|
965 |
|
|
table. */
|
966 |
|
|
|
967 |
|
|
static bfd_boolean
|
968 |
|
|
elf_s390_check_relocs (abfd, info, sec, relocs)
|
969 |
|
|
bfd *abfd;
|
970 |
|
|
struct bfd_link_info *info;
|
971 |
|
|
asection *sec;
|
972 |
|
|
const Elf_Internal_Rela *relocs;
|
973 |
|
|
{
|
974 |
|
|
struct elf_s390_link_hash_table *htab;
|
975 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
976 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
977 |
|
|
const Elf_Internal_Rela *rel;
|
978 |
|
|
const Elf_Internal_Rela *rel_end;
|
979 |
|
|
asection *sreloc;
|
980 |
|
|
bfd_signed_vma *local_got_refcounts;
|
981 |
|
|
int tls_type, old_tls_type;
|
982 |
|
|
|
983 |
|
|
if (info->relocatable)
|
984 |
|
|
return TRUE;
|
985 |
|
|
|
986 |
|
|
BFD_ASSERT (is_s390_elf (abfd));
|
987 |
|
|
|
988 |
|
|
htab = elf_s390_hash_table (info);
|
989 |
|
|
symtab_hdr = &elf_symtab_hdr (abfd);
|
990 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
991 |
|
|
local_got_refcounts = elf_local_got_refcounts (abfd);
|
992 |
|
|
|
993 |
|
|
sreloc = NULL;
|
994 |
|
|
|
995 |
|
|
rel_end = relocs + sec->reloc_count;
|
996 |
|
|
for (rel = relocs; rel < rel_end; rel++)
|
997 |
|
|
{
|
998 |
|
|
unsigned int r_type;
|
999 |
|
|
unsigned long r_symndx;
|
1000 |
|
|
struct elf_link_hash_entry *h;
|
1001 |
|
|
|
1002 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
1003 |
|
|
|
1004 |
|
|
if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
|
1005 |
|
|
{
|
1006 |
|
|
(*_bfd_error_handler) (_("%B: bad symbol index: %d"),
|
1007 |
|
|
abfd, r_symndx);
|
1008 |
|
|
return FALSE;
|
1009 |
|
|
}
|
1010 |
|
|
|
1011 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
1012 |
|
|
h = NULL;
|
1013 |
|
|
else
|
1014 |
|
|
{
|
1015 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
1016 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
1017 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
1018 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
1019 |
|
|
}
|
1020 |
|
|
|
1021 |
|
|
/* Create got section and local_got_refcounts array if they
|
1022 |
|
|
are needed. */
|
1023 |
|
|
r_type = elf_s390_tls_transition (info,
|
1024 |
|
|
ELF32_R_TYPE (rel->r_info),
|
1025 |
|
|
h == NULL);
|
1026 |
|
|
switch (r_type)
|
1027 |
|
|
{
|
1028 |
|
|
case R_390_GOT12:
|
1029 |
|
|
case R_390_GOT16:
|
1030 |
|
|
case R_390_GOT20:
|
1031 |
|
|
case R_390_GOT32:
|
1032 |
|
|
case R_390_GOTENT:
|
1033 |
|
|
case R_390_GOTPLT12:
|
1034 |
|
|
case R_390_GOTPLT16:
|
1035 |
|
|
case R_390_GOTPLT20:
|
1036 |
|
|
case R_390_GOTPLT32:
|
1037 |
|
|
case R_390_GOTPLTENT:
|
1038 |
|
|
case R_390_TLS_GD32:
|
1039 |
|
|
case R_390_TLS_GOTIE12:
|
1040 |
|
|
case R_390_TLS_GOTIE20:
|
1041 |
|
|
case R_390_TLS_GOTIE32:
|
1042 |
|
|
case R_390_TLS_IEENT:
|
1043 |
|
|
case R_390_TLS_IE32:
|
1044 |
|
|
case R_390_TLS_LDM32:
|
1045 |
|
|
if (h == NULL
|
1046 |
|
|
&& local_got_refcounts == NULL)
|
1047 |
|
|
{
|
1048 |
|
|
bfd_size_type size;
|
1049 |
|
|
|
1050 |
|
|
size = symtab_hdr->sh_info;
|
1051 |
|
|
size *= (sizeof (bfd_signed_vma) + sizeof(char));
|
1052 |
|
|
local_got_refcounts = ((bfd_signed_vma *)
|
1053 |
|
|
bfd_zalloc (abfd, size));
|
1054 |
|
|
if (local_got_refcounts == NULL)
|
1055 |
|
|
return FALSE;
|
1056 |
|
|
elf_local_got_refcounts (abfd) = local_got_refcounts;
|
1057 |
|
|
elf_s390_local_got_tls_type (abfd)
|
1058 |
|
|
= (char *) (local_got_refcounts + symtab_hdr->sh_info);
|
1059 |
|
|
}
|
1060 |
|
|
/* Fall through. */
|
1061 |
|
|
case R_390_GOTOFF16:
|
1062 |
|
|
case R_390_GOTOFF32:
|
1063 |
|
|
case R_390_GOTPC:
|
1064 |
|
|
case R_390_GOTPCDBL:
|
1065 |
|
|
if (htab->sgot == NULL)
|
1066 |
|
|
{
|
1067 |
|
|
if (htab->elf.dynobj == NULL)
|
1068 |
|
|
htab->elf.dynobj = abfd;
|
1069 |
|
|
if (!create_got_section (htab->elf.dynobj, info))
|
1070 |
|
|
return FALSE;
|
1071 |
|
|
}
|
1072 |
|
|
}
|
1073 |
|
|
|
1074 |
|
|
switch (r_type)
|
1075 |
|
|
{
|
1076 |
|
|
case R_390_GOTOFF16:
|
1077 |
|
|
case R_390_GOTOFF32:
|
1078 |
|
|
case R_390_GOTPC:
|
1079 |
|
|
case R_390_GOTPCDBL:
|
1080 |
|
|
/* Got is created, nothing to be done. */
|
1081 |
|
|
break;
|
1082 |
|
|
|
1083 |
|
|
case R_390_PLT16DBL:
|
1084 |
|
|
case R_390_PLT32DBL:
|
1085 |
|
|
case R_390_PLT32:
|
1086 |
|
|
case R_390_PLTOFF16:
|
1087 |
|
|
case R_390_PLTOFF32:
|
1088 |
|
|
/* This symbol requires a procedure linkage table entry. We
|
1089 |
|
|
actually build the entry in adjust_dynamic_symbol,
|
1090 |
|
|
because this might be a case of linking PIC code which is
|
1091 |
|
|
never referenced by a dynamic object, in which case we
|
1092 |
|
|
don't need to generate a procedure linkage table entry
|
1093 |
|
|
after all. */
|
1094 |
|
|
|
1095 |
|
|
/* If this is a local symbol, we resolve it directly without
|
1096 |
|
|
creating a procedure linkage table entry. */
|
1097 |
|
|
if (h != NULL)
|
1098 |
|
|
{
|
1099 |
|
|
h->needs_plt = 1;
|
1100 |
|
|
h->plt.refcount += 1;
|
1101 |
|
|
}
|
1102 |
|
|
break;
|
1103 |
|
|
|
1104 |
|
|
case R_390_GOTPLT12:
|
1105 |
|
|
case R_390_GOTPLT16:
|
1106 |
|
|
case R_390_GOTPLT20:
|
1107 |
|
|
case R_390_GOTPLT32:
|
1108 |
|
|
case R_390_GOTPLTENT:
|
1109 |
|
|
/* This symbol requires either a procedure linkage table entry
|
1110 |
|
|
or an entry in the local got. We actually build the entry
|
1111 |
|
|
in adjust_dynamic_symbol because whether this is really a
|
1112 |
|
|
global reference can change and with it the fact if we have
|
1113 |
|
|
to create a plt entry or a local got entry. To be able to
|
1114 |
|
|
make a once global symbol a local one we have to keep track
|
1115 |
|
|
of the number of gotplt references that exist for this
|
1116 |
|
|
symbol. */
|
1117 |
|
|
if (h != NULL)
|
1118 |
|
|
{
|
1119 |
|
|
((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
|
1120 |
|
|
h->needs_plt = 1;
|
1121 |
|
|
h->plt.refcount += 1;
|
1122 |
|
|
}
|
1123 |
|
|
else
|
1124 |
|
|
local_got_refcounts[r_symndx] += 1;
|
1125 |
|
|
break;
|
1126 |
|
|
|
1127 |
|
|
case R_390_TLS_LDM32:
|
1128 |
|
|
htab->tls_ldm_got.refcount += 1;
|
1129 |
|
|
break;
|
1130 |
|
|
|
1131 |
|
|
case R_390_TLS_IE32:
|
1132 |
|
|
case R_390_TLS_GOTIE12:
|
1133 |
|
|
case R_390_TLS_GOTIE20:
|
1134 |
|
|
case R_390_TLS_GOTIE32:
|
1135 |
|
|
case R_390_TLS_IEENT:
|
1136 |
|
|
if (info->shared)
|
1137 |
|
|
info->flags |= DF_STATIC_TLS;
|
1138 |
|
|
/* Fall through. */
|
1139 |
|
|
|
1140 |
|
|
case R_390_GOT12:
|
1141 |
|
|
case R_390_GOT16:
|
1142 |
|
|
case R_390_GOT20:
|
1143 |
|
|
case R_390_GOT32:
|
1144 |
|
|
case R_390_GOTENT:
|
1145 |
|
|
case R_390_TLS_GD32:
|
1146 |
|
|
/* This symbol requires a global offset table entry. */
|
1147 |
|
|
switch (r_type)
|
1148 |
|
|
{
|
1149 |
|
|
default:
|
1150 |
|
|
case R_390_GOT12:
|
1151 |
|
|
case R_390_GOT16:
|
1152 |
|
|
case R_390_GOT20:
|
1153 |
|
|
case R_390_GOT32:
|
1154 |
|
|
case R_390_GOTENT:
|
1155 |
|
|
tls_type = GOT_NORMAL;
|
1156 |
|
|
break;
|
1157 |
|
|
case R_390_TLS_GD32:
|
1158 |
|
|
tls_type = GOT_TLS_GD;
|
1159 |
|
|
break;
|
1160 |
|
|
case R_390_TLS_IE32:
|
1161 |
|
|
case R_390_TLS_GOTIE32:
|
1162 |
|
|
tls_type = GOT_TLS_IE;
|
1163 |
|
|
break;
|
1164 |
|
|
case R_390_TLS_GOTIE12:
|
1165 |
|
|
case R_390_TLS_GOTIE20:
|
1166 |
|
|
case R_390_TLS_IEENT:
|
1167 |
|
|
tls_type = GOT_TLS_IE_NLT;
|
1168 |
|
|
break;
|
1169 |
|
|
}
|
1170 |
|
|
|
1171 |
|
|
if (h != NULL)
|
1172 |
|
|
{
|
1173 |
|
|
h->got.refcount += 1;
|
1174 |
|
|
old_tls_type = elf_s390_hash_entry(h)->tls_type;
|
1175 |
|
|
}
|
1176 |
|
|
else
|
1177 |
|
|
{
|
1178 |
|
|
local_got_refcounts[r_symndx] += 1;
|
1179 |
|
|
old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
|
1180 |
|
|
}
|
1181 |
|
|
/* If a TLS symbol is accessed using IE at least once,
|
1182 |
|
|
there is no point to use dynamic model for it. */
|
1183 |
|
|
if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
|
1184 |
|
|
{
|
1185 |
|
|
if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
|
1186 |
|
|
{
|
1187 |
|
|
(*_bfd_error_handler)
|
1188 |
|
|
(_("%B: `%s' accessed both as normal and thread local symbol"),
|
1189 |
|
|
abfd, h->root.root.string);
|
1190 |
|
|
return FALSE;
|
1191 |
|
|
}
|
1192 |
|
|
if (old_tls_type > tls_type)
|
1193 |
|
|
tls_type = old_tls_type;
|
1194 |
|
|
}
|
1195 |
|
|
|
1196 |
|
|
if (old_tls_type != tls_type)
|
1197 |
|
|
{
|
1198 |
|
|
if (h != NULL)
|
1199 |
|
|
elf_s390_hash_entry (h)->tls_type = tls_type;
|
1200 |
|
|
else
|
1201 |
|
|
elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
|
1202 |
|
|
}
|
1203 |
|
|
|
1204 |
|
|
if (r_type != R_390_TLS_IE32)
|
1205 |
|
|
break;
|
1206 |
|
|
/* Fall through. */
|
1207 |
|
|
|
1208 |
|
|
case R_390_TLS_LE32:
|
1209 |
|
|
if (!info->shared)
|
1210 |
|
|
break;
|
1211 |
|
|
info->flags |= DF_STATIC_TLS;
|
1212 |
|
|
/* Fall through. */
|
1213 |
|
|
|
1214 |
|
|
case R_390_8:
|
1215 |
|
|
case R_390_16:
|
1216 |
|
|
case R_390_32:
|
1217 |
|
|
case R_390_PC16:
|
1218 |
|
|
case R_390_PC16DBL:
|
1219 |
|
|
case R_390_PC32DBL:
|
1220 |
|
|
case R_390_PC32:
|
1221 |
|
|
if (h != NULL && !info->shared)
|
1222 |
|
|
{
|
1223 |
|
|
/* If this reloc is in a read-only section, we might
|
1224 |
|
|
need a copy reloc. We can't check reliably at this
|
1225 |
|
|
stage whether the section is read-only, as input
|
1226 |
|
|
sections have not yet been mapped to output sections.
|
1227 |
|
|
Tentatively set the flag for now, and correct in
|
1228 |
|
|
adjust_dynamic_symbol. */
|
1229 |
|
|
h->non_got_ref = 1;
|
1230 |
|
|
|
1231 |
|
|
/* We may need a .plt entry if the function this reloc
|
1232 |
|
|
refers to is in a shared lib. */
|
1233 |
|
|
h->plt.refcount += 1;
|
1234 |
|
|
}
|
1235 |
|
|
|
1236 |
|
|
/* If we are creating a shared library, and this is a reloc
|
1237 |
|
|
against a global symbol, or a non PC relative reloc
|
1238 |
|
|
against a local symbol, then we need to copy the reloc
|
1239 |
|
|
into the shared library. However, if we are linking with
|
1240 |
|
|
-Bsymbolic, we do not need to copy a reloc against a
|
1241 |
|
|
global symbol which is defined in an object we are
|
1242 |
|
|
including in the link (i.e., DEF_REGULAR is set). At
|
1243 |
|
|
this point we have not seen all the input files, so it is
|
1244 |
|
|
possible that DEF_REGULAR is not set now but will be set
|
1245 |
|
|
later (it is never cleared). In case of a weak definition,
|
1246 |
|
|
DEF_REGULAR may be cleared later by a strong definition in
|
1247 |
|
|
a shared library. We account for that possibility below by
|
1248 |
|
|
storing information in the relocs_copied field of the hash
|
1249 |
|
|
table entry. A similar situation occurs when creating
|
1250 |
|
|
shared libraries and symbol visibility changes render the
|
1251 |
|
|
symbol local.
|
1252 |
|
|
|
1253 |
|
|
If on the other hand, we are creating an executable, we
|
1254 |
|
|
may need to keep relocations for symbols satisfied by a
|
1255 |
|
|
dynamic library if we manage to avoid copy relocs for the
|
1256 |
|
|
symbol. */
|
1257 |
|
|
if ((info->shared
|
1258 |
|
|
&& (sec->flags & SEC_ALLOC) != 0
|
1259 |
|
|
&& ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
|
1260 |
|
|
&& ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
|
1261 |
|
|
&& ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
|
1262 |
|
|
&& ELF32_R_TYPE (rel->r_info) != R_390_PC32)
|
1263 |
|
|
|| (h != NULL
|
1264 |
|
|
&& (! info->symbolic
|
1265 |
|
|
|| h->root.type == bfd_link_hash_defweak
|
1266 |
|
|
|| !h->def_regular))))
|
1267 |
|
|
|| (ELIMINATE_COPY_RELOCS
|
1268 |
|
|
&& !info->shared
|
1269 |
|
|
&& (sec->flags & SEC_ALLOC) != 0
|
1270 |
|
|
&& h != NULL
|
1271 |
|
|
&& (h->root.type == bfd_link_hash_defweak
|
1272 |
|
|
|| !h->def_regular)))
|
1273 |
|
|
{
|
1274 |
|
|
struct elf_s390_dyn_relocs *p;
|
1275 |
|
|
struct elf_s390_dyn_relocs **head;
|
1276 |
|
|
|
1277 |
|
|
/* We must copy these reloc types into the output file.
|
1278 |
|
|
Create a reloc section in dynobj and make room for
|
1279 |
|
|
this reloc. */
|
1280 |
|
|
if (sreloc == NULL)
|
1281 |
|
|
{
|
1282 |
|
|
const char *name;
|
1283 |
|
|
bfd *dynobj;
|
1284 |
|
|
|
1285 |
|
|
name = (bfd_elf_string_from_elf_section
|
1286 |
|
|
(abfd,
|
1287 |
|
|
elf_elfheader (abfd)->e_shstrndx,
|
1288 |
|
|
elf_section_data (sec)->rel_hdr.sh_name));
|
1289 |
|
|
if (name == NULL)
|
1290 |
|
|
return FALSE;
|
1291 |
|
|
|
1292 |
|
|
if (! CONST_STRNEQ (name, ".rela")
|
1293 |
|
|
|| strcmp (bfd_get_section_name (abfd, sec),
|
1294 |
|
|
name + 5) != 0)
|
1295 |
|
|
{
|
1296 |
|
|
(*_bfd_error_handler)
|
1297 |
|
|
(_("%B: bad relocation section name `%s\'"),
|
1298 |
|
|
abfd, name);
|
1299 |
|
|
}
|
1300 |
|
|
|
1301 |
|
|
if (htab->elf.dynobj == NULL)
|
1302 |
|
|
htab->elf.dynobj = abfd;
|
1303 |
|
|
|
1304 |
|
|
dynobj = htab->elf.dynobj;
|
1305 |
|
|
sreloc = bfd_get_section_by_name (dynobj, name);
|
1306 |
|
|
if (sreloc == NULL)
|
1307 |
|
|
{
|
1308 |
|
|
flagword flags;
|
1309 |
|
|
|
1310 |
|
|
flags = (SEC_HAS_CONTENTS | SEC_READONLY
|
1311 |
|
|
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
1312 |
|
|
if ((sec->flags & SEC_ALLOC) != 0)
|
1313 |
|
|
flags |= SEC_ALLOC | SEC_LOAD;
|
1314 |
|
|
sreloc = bfd_make_section_with_flags (dynobj,
|
1315 |
|
|
name,
|
1316 |
|
|
flags);
|
1317 |
|
|
if (sreloc == NULL
|
1318 |
|
|
|| ! bfd_set_section_alignment (dynobj, sreloc, 2))
|
1319 |
|
|
return FALSE;
|
1320 |
|
|
}
|
1321 |
|
|
elf_section_data (sec)->sreloc = sreloc;
|
1322 |
|
|
}
|
1323 |
|
|
|
1324 |
|
|
/* If this is a global symbol, we count the number of
|
1325 |
|
|
relocations we need for this symbol. */
|
1326 |
|
|
if (h != NULL)
|
1327 |
|
|
{
|
1328 |
|
|
head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
|
1329 |
|
|
}
|
1330 |
|
|
else
|
1331 |
|
|
{
|
1332 |
|
|
/* Track dynamic relocs needed for local syms too.
|
1333 |
|
|
We really need local syms available to do this
|
1334 |
|
|
easily. Oh well. */
|
1335 |
|
|
asection *s;
|
1336 |
|
|
void *vpp;
|
1337 |
|
|
|
1338 |
|
|
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
|
1339 |
|
|
sec, r_symndx);
|
1340 |
|
|
if (s == NULL)
|
1341 |
|
|
return FALSE;
|
1342 |
|
|
|
1343 |
|
|
vpp = &elf_section_data (s)->local_dynrel;
|
1344 |
|
|
head = (struct elf_s390_dyn_relocs **) vpp;
|
1345 |
|
|
}
|
1346 |
|
|
|
1347 |
|
|
p = *head;
|
1348 |
|
|
if (p == NULL || p->sec != sec)
|
1349 |
|
|
{
|
1350 |
|
|
bfd_size_type amt = sizeof *p;
|
1351 |
|
|
|
1352 |
|
|
p = ((struct elf_s390_dyn_relocs *)
|
1353 |
|
|
bfd_alloc (htab->elf.dynobj, amt));
|
1354 |
|
|
if (p == NULL)
|
1355 |
|
|
return FALSE;
|
1356 |
|
|
p->next = *head;
|
1357 |
|
|
*head = p;
|
1358 |
|
|
p->sec = sec;
|
1359 |
|
|
p->count = 0;
|
1360 |
|
|
p->pc_count = 0;
|
1361 |
|
|
}
|
1362 |
|
|
|
1363 |
|
|
p->count += 1;
|
1364 |
|
|
if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
|
1365 |
|
|
|| ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
|
1366 |
|
|
|| ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
|
1367 |
|
|
|| ELF32_R_TYPE (rel->r_info) == R_390_PC32)
|
1368 |
|
|
p->pc_count += 1;
|
1369 |
|
|
}
|
1370 |
|
|
break;
|
1371 |
|
|
|
1372 |
|
|
/* This relocation describes the C++ object vtable hierarchy.
|
1373 |
|
|
Reconstruct it for later use during GC. */
|
1374 |
|
|
case R_390_GNU_VTINHERIT:
|
1375 |
|
|
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
1376 |
|
|
return FALSE;
|
1377 |
|
|
break;
|
1378 |
|
|
|
1379 |
|
|
/* This relocation describes which C++ vtable entries are actually
|
1380 |
|
|
used. Record for later use during GC. */
|
1381 |
|
|
case R_390_GNU_VTENTRY:
|
1382 |
|
|
BFD_ASSERT (h != NULL);
|
1383 |
|
|
if (h != NULL
|
1384 |
|
|
&& !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
1385 |
|
|
return FALSE;
|
1386 |
|
|
break;
|
1387 |
|
|
|
1388 |
|
|
default:
|
1389 |
|
|
break;
|
1390 |
|
|
}
|
1391 |
|
|
}
|
1392 |
|
|
|
1393 |
|
|
return TRUE;
|
1394 |
|
|
}
|
1395 |
|
|
|
1396 |
|
|
/* Return the section that should be marked against GC for a given
|
1397 |
|
|
relocation. */
|
1398 |
|
|
|
1399 |
|
|
static asection *
|
1400 |
|
|
elf_s390_gc_mark_hook (asection *sec,
|
1401 |
|
|
struct bfd_link_info *info,
|
1402 |
|
|
Elf_Internal_Rela *rel,
|
1403 |
|
|
struct elf_link_hash_entry *h,
|
1404 |
|
|
Elf_Internal_Sym *sym)
|
1405 |
|
|
{
|
1406 |
|
|
if (h != NULL)
|
1407 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
1408 |
|
|
{
|
1409 |
|
|
case R_390_GNU_VTINHERIT:
|
1410 |
|
|
case R_390_GNU_VTENTRY:
|
1411 |
|
|
return NULL;
|
1412 |
|
|
}
|
1413 |
|
|
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
|
1414 |
|
|
|
1415 |
|
|
}
|
1416 |
|
|
|
1417 |
|
|
/* Update the got entry reference counts for the section being removed. */
|
1418 |
|
|
|
1419 |
|
|
static bfd_boolean
|
1420 |
|
|
elf_s390_gc_sweep_hook (bfd *abfd,
|
1421 |
|
|
struct bfd_link_info *info,
|
1422 |
|
|
asection *sec,
|
1423 |
|
|
const Elf_Internal_Rela *relocs)
|
1424 |
|
|
{
|
1425 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
1426 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
1427 |
|
|
bfd_signed_vma *local_got_refcounts;
|
1428 |
|
|
const Elf_Internal_Rela *rel, *relend;
|
1429 |
|
|
|
1430 |
|
|
if (info->relocatable)
|
1431 |
|
|
return TRUE;
|
1432 |
|
|
|
1433 |
|
|
elf_section_data (sec)->local_dynrel = NULL;
|
1434 |
|
|
|
1435 |
|
|
symtab_hdr = &elf_symtab_hdr (abfd);
|
1436 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
1437 |
|
|
local_got_refcounts = elf_local_got_refcounts (abfd);
|
1438 |
|
|
|
1439 |
|
|
relend = relocs + sec->reloc_count;
|
1440 |
|
|
for (rel = relocs; rel < relend; rel++)
|
1441 |
|
|
{
|
1442 |
|
|
unsigned long r_symndx;
|
1443 |
|
|
unsigned int r_type;
|
1444 |
|
|
struct elf_link_hash_entry *h = NULL;
|
1445 |
|
|
|
1446 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
1447 |
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
1448 |
|
|
{
|
1449 |
|
|
struct elf_s390_link_hash_entry *eh;
|
1450 |
|
|
struct elf_s390_dyn_relocs **pp;
|
1451 |
|
|
struct elf_s390_dyn_relocs *p;
|
1452 |
|
|
|
1453 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
1454 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
1455 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
1456 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
1457 |
|
|
eh = (struct elf_s390_link_hash_entry *) h;
|
1458 |
|
|
|
1459 |
|
|
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
|
1460 |
|
|
if (p->sec == sec)
|
1461 |
|
|
{
|
1462 |
|
|
/* Everything must go for SEC. */
|
1463 |
|
|
*pp = p->next;
|
1464 |
|
|
break;
|
1465 |
|
|
}
|
1466 |
|
|
}
|
1467 |
|
|
|
1468 |
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
1469 |
|
|
r_type = elf_s390_tls_transition (info, r_type, h != NULL);
|
1470 |
|
|
switch (r_type)
|
1471 |
|
|
{
|
1472 |
|
|
case R_390_TLS_LDM32:
|
1473 |
|
|
if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
|
1474 |
|
|
elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
|
1475 |
|
|
break;
|
1476 |
|
|
|
1477 |
|
|
case R_390_TLS_GD32:
|
1478 |
|
|
case R_390_TLS_IE32:
|
1479 |
|
|
case R_390_TLS_GOTIE12:
|
1480 |
|
|
case R_390_TLS_GOTIE20:
|
1481 |
|
|
case R_390_TLS_GOTIE32:
|
1482 |
|
|
case R_390_TLS_IEENT:
|
1483 |
|
|
case R_390_GOT12:
|
1484 |
|
|
case R_390_GOT16:
|
1485 |
|
|
case R_390_GOT20:
|
1486 |
|
|
case R_390_GOT32:
|
1487 |
|
|
case R_390_GOTOFF16:
|
1488 |
|
|
case R_390_GOTOFF32:
|
1489 |
|
|
case R_390_GOTPC:
|
1490 |
|
|
case R_390_GOTPCDBL:
|
1491 |
|
|
case R_390_GOTENT:
|
1492 |
|
|
if (h != NULL)
|
1493 |
|
|
{
|
1494 |
|
|
if (h->got.refcount > 0)
|
1495 |
|
|
h->got.refcount -= 1;
|
1496 |
|
|
}
|
1497 |
|
|
else if (local_got_refcounts != NULL)
|
1498 |
|
|
{
|
1499 |
|
|
if (local_got_refcounts[r_symndx] > 0)
|
1500 |
|
|
local_got_refcounts[r_symndx] -= 1;
|
1501 |
|
|
}
|
1502 |
|
|
break;
|
1503 |
|
|
|
1504 |
|
|
case R_390_8:
|
1505 |
|
|
case R_390_12:
|
1506 |
|
|
case R_390_16:
|
1507 |
|
|
case R_390_20:
|
1508 |
|
|
case R_390_32:
|
1509 |
|
|
case R_390_PC16:
|
1510 |
|
|
case R_390_PC16DBL:
|
1511 |
|
|
case R_390_PC32DBL:
|
1512 |
|
|
case R_390_PC32:
|
1513 |
|
|
if (info->shared)
|
1514 |
|
|
break;
|
1515 |
|
|
/* Fall through. */
|
1516 |
|
|
|
1517 |
|
|
case R_390_PLT16DBL:
|
1518 |
|
|
case R_390_PLT32DBL:
|
1519 |
|
|
case R_390_PLT32:
|
1520 |
|
|
case R_390_PLTOFF16:
|
1521 |
|
|
case R_390_PLTOFF32:
|
1522 |
|
|
if (h != NULL)
|
1523 |
|
|
{
|
1524 |
|
|
if (h->plt.refcount > 0)
|
1525 |
|
|
h->plt.refcount -= 1;
|
1526 |
|
|
}
|
1527 |
|
|
break;
|
1528 |
|
|
|
1529 |
|
|
case R_390_GOTPLT12:
|
1530 |
|
|
case R_390_GOTPLT16:
|
1531 |
|
|
case R_390_GOTPLT20:
|
1532 |
|
|
case R_390_GOTPLT32:
|
1533 |
|
|
case R_390_GOTPLTENT:
|
1534 |
|
|
if (h != NULL)
|
1535 |
|
|
{
|
1536 |
|
|
if (h->plt.refcount > 0)
|
1537 |
|
|
{
|
1538 |
|
|
((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
|
1539 |
|
|
h->plt.refcount -= 1;
|
1540 |
|
|
}
|
1541 |
|
|
}
|
1542 |
|
|
else if (local_got_refcounts != NULL)
|
1543 |
|
|
{
|
1544 |
|
|
if (local_got_refcounts[r_symndx] > 0)
|
1545 |
|
|
local_got_refcounts[r_symndx] -= 1;
|
1546 |
|
|
}
|
1547 |
|
|
break;
|
1548 |
|
|
|
1549 |
|
|
default:
|
1550 |
|
|
break;
|
1551 |
|
|
}
|
1552 |
|
|
}
|
1553 |
|
|
|
1554 |
|
|
return TRUE;
|
1555 |
|
|
}
|
1556 |
|
|
|
1557 |
|
|
/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
|
1558 |
|
|
entry but we found we will not create any. Called when we find we will
|
1559 |
|
|
not have any PLT for this symbol, by for example
|
1560 |
|
|
elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
|
1561 |
|
|
or elf_s390_size_dynamic_sections if no dynamic sections will be
|
1562 |
|
|
created (we're only linking static objects). */
|
1563 |
|
|
|
1564 |
|
|
static void
|
1565 |
|
|
elf_s390_adjust_gotplt (h)
|
1566 |
|
|
struct elf_s390_link_hash_entry *h;
|
1567 |
|
|
{
|
1568 |
|
|
if (h->elf.root.type == bfd_link_hash_warning)
|
1569 |
|
|
h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
|
1570 |
|
|
|
1571 |
|
|
if (h->gotplt_refcount <= 0)
|
1572 |
|
|
return;
|
1573 |
|
|
|
1574 |
|
|
/* We simply add the number of gotplt references to the number
|
1575 |
|
|
* of got references for this symbol. */
|
1576 |
|
|
h->elf.got.refcount += h->gotplt_refcount;
|
1577 |
|
|
h->gotplt_refcount = -1;
|
1578 |
|
|
}
|
1579 |
|
|
|
1580 |
|
|
/* Adjust a symbol defined by a dynamic object and referenced by a
|
1581 |
|
|
regular object. The current definition is in some section of the
|
1582 |
|
|
dynamic object, but we're not including those sections. We have to
|
1583 |
|
|
change the definition to something the rest of the link can
|
1584 |
|
|
understand. */
|
1585 |
|
|
|
1586 |
|
|
static bfd_boolean
|
1587 |
|
|
elf_s390_adjust_dynamic_symbol (info, h)
|
1588 |
|
|
struct bfd_link_info *info;
|
1589 |
|
|
struct elf_link_hash_entry *h;
|
1590 |
|
|
{
|
1591 |
|
|
struct elf_s390_link_hash_table *htab;
|
1592 |
|
|
asection *s;
|
1593 |
|
|
|
1594 |
|
|
/* If this is a function, put it in the procedure linkage table. We
|
1595 |
|
|
will fill in the contents of the procedure linkage table later
|
1596 |
|
|
(although we could actually do it here). */
|
1597 |
|
|
if (h->type == STT_FUNC
|
1598 |
|
|
|| h->needs_plt)
|
1599 |
|
|
{
|
1600 |
|
|
if (h->plt.refcount <= 0
|
1601 |
|
|
|| (! info->shared
|
1602 |
|
|
&& !h->def_dynamic
|
1603 |
|
|
&& !h->ref_dynamic
|
1604 |
|
|
&& h->root.type != bfd_link_hash_undefweak
|
1605 |
|
|
&& h->root.type != bfd_link_hash_undefined))
|
1606 |
|
|
{
|
1607 |
|
|
/* This case can occur if we saw a PLT32 reloc in an input
|
1608 |
|
|
file, but the symbol was never referred to by a dynamic
|
1609 |
|
|
object, or if all references were garbage collected. In
|
1610 |
|
|
such a case, we don't actually need to build a procedure
|
1611 |
|
|
linkage table, and we can just do a PC32 reloc instead. */
|
1612 |
|
|
h->plt.offset = (bfd_vma) -1;
|
1613 |
|
|
h->needs_plt = 0;
|
1614 |
|
|
elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
|
1615 |
|
|
}
|
1616 |
|
|
|
1617 |
|
|
return TRUE;
|
1618 |
|
|
}
|
1619 |
|
|
else
|
1620 |
|
|
/* It's possible that we incorrectly decided a .plt reloc was
|
1621 |
|
|
needed for an R_390_PC32 reloc to a non-function sym in
|
1622 |
|
|
check_relocs. We can't decide accurately between function and
|
1623 |
|
|
non-function syms in check-relocs; Objects loaded later in
|
1624 |
|
|
the link may change h->type. So fix it now. */
|
1625 |
|
|
h->plt.offset = (bfd_vma) -1;
|
1626 |
|
|
|
1627 |
|
|
/* If this is a weak symbol, and there is a real definition, the
|
1628 |
|
|
processor independent code will have arranged for us to see the
|
1629 |
|
|
real definition first, and we can just use the same value. */
|
1630 |
|
|
if (h->u.weakdef != NULL)
|
1631 |
|
|
{
|
1632 |
|
|
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|
1633 |
|
|
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
|
1634 |
|
|
h->root.u.def.section = h->u.weakdef->root.u.def.section;
|
1635 |
|
|
h->root.u.def.value = h->u.weakdef->root.u.def.value;
|
1636 |
|
|
if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
|
1637 |
|
|
h->non_got_ref = h->u.weakdef->non_got_ref;
|
1638 |
|
|
return TRUE;
|
1639 |
|
|
}
|
1640 |
|
|
|
1641 |
|
|
/* This is a reference to a symbol defined by a dynamic object which
|
1642 |
|
|
is not a function. */
|
1643 |
|
|
|
1644 |
|
|
/* If we are creating a shared library, we must presume that the
|
1645 |
|
|
only references to the symbol are via the global offset table.
|
1646 |
|
|
For such cases we need not do anything here; the relocations will
|
1647 |
|
|
be handled correctly by relocate_section. */
|
1648 |
|
|
if (info->shared)
|
1649 |
|
|
return TRUE;
|
1650 |
|
|
|
1651 |
|
|
/* If there are no references to this symbol that do not use the
|
1652 |
|
|
GOT, we don't need to generate a copy reloc. */
|
1653 |
|
|
if (!h->non_got_ref)
|
1654 |
|
|
return TRUE;
|
1655 |
|
|
|
1656 |
|
|
/* If -z nocopyreloc was given, we won't generate them either. */
|
1657 |
|
|
if (info->nocopyreloc)
|
1658 |
|
|
{
|
1659 |
|
|
h->non_got_ref = 0;
|
1660 |
|
|
return TRUE;
|
1661 |
|
|
}
|
1662 |
|
|
|
1663 |
|
|
if (ELIMINATE_COPY_RELOCS)
|
1664 |
|
|
{
|
1665 |
|
|
struct elf_s390_link_hash_entry * eh;
|
1666 |
|
|
struct elf_s390_dyn_relocs *p;
|
1667 |
|
|
|
1668 |
|
|
eh = (struct elf_s390_link_hash_entry *) h;
|
1669 |
|
|
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
1670 |
|
|
{
|
1671 |
|
|
s = p->sec->output_section;
|
1672 |
|
|
if (s != NULL && (s->flags & SEC_READONLY) != 0)
|
1673 |
|
|
break;
|
1674 |
|
|
}
|
1675 |
|
|
|
1676 |
|
|
/* If we didn't find any dynamic relocs in read-only sections, then
|
1677 |
|
|
we'll be keeping the dynamic relocs and avoiding the copy reloc. */
|
1678 |
|
|
if (p == NULL)
|
1679 |
|
|
{
|
1680 |
|
|
h->non_got_ref = 0;
|
1681 |
|
|
return TRUE;
|
1682 |
|
|
}
|
1683 |
|
|
}
|
1684 |
|
|
|
1685 |
|
|
if (h->size == 0)
|
1686 |
|
|
{
|
1687 |
|
|
(*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
|
1688 |
|
|
h->root.root.string);
|
1689 |
|
|
return TRUE;
|
1690 |
|
|
}
|
1691 |
|
|
|
1692 |
|
|
/* We must allocate the symbol in our .dynbss section, which will
|
1693 |
|
|
become part of the .bss section of the executable. There will be
|
1694 |
|
|
an entry for this symbol in the .dynsym section. The dynamic
|
1695 |
|
|
object will contain position independent code, so all references
|
1696 |
|
|
from the dynamic object to this symbol will go through the global
|
1697 |
|
|
offset table. The dynamic linker will use the .dynsym entry to
|
1698 |
|
|
determine the address it must put in the global offset table, so
|
1699 |
|
|
both the dynamic object and the regular object will refer to the
|
1700 |
|
|
same memory location for the variable. */
|
1701 |
|
|
|
1702 |
|
|
htab = elf_s390_hash_table (info);
|
1703 |
|
|
|
1704 |
|
|
/* We must generate a R_390_COPY reloc to tell the dynamic linker to
|
1705 |
|
|
copy the initial value out of the dynamic object and into the
|
1706 |
|
|
runtime process image. */
|
1707 |
|
|
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
1708 |
|
|
{
|
1709 |
|
|
htab->srelbss->size += sizeof (Elf32_External_Rela);
|
1710 |
|
|
h->needs_copy = 1;
|
1711 |
|
|
}
|
1712 |
|
|
|
1713 |
|
|
s = htab->sdynbss;
|
1714 |
|
|
|
1715 |
|
|
return _bfd_elf_adjust_dynamic_copy (h, s);
|
1716 |
|
|
}
|
1717 |
|
|
|
1718 |
|
|
/* Allocate space in .plt, .got and associated reloc sections for
|
1719 |
|
|
dynamic relocs. */
|
1720 |
|
|
|
1721 |
|
|
static bfd_boolean
|
1722 |
|
|
allocate_dynrelocs (h, inf)
|
1723 |
|
|
struct elf_link_hash_entry *h;
|
1724 |
|
|
PTR inf;
|
1725 |
|
|
{
|
1726 |
|
|
struct bfd_link_info *info;
|
1727 |
|
|
struct elf_s390_link_hash_table *htab;
|
1728 |
|
|
struct elf_s390_link_hash_entry *eh;
|
1729 |
|
|
struct elf_s390_dyn_relocs *p;
|
1730 |
|
|
|
1731 |
|
|
if (h->root.type == bfd_link_hash_indirect)
|
1732 |
|
|
return TRUE;
|
1733 |
|
|
|
1734 |
|
|
if (h->root.type == bfd_link_hash_warning)
|
1735 |
|
|
/* When warning symbols are created, they **replace** the "real"
|
1736 |
|
|
entry in the hash table, thus we never get to see the real
|
1737 |
|
|
symbol in a hash traversal. So look at it now. */
|
1738 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
1739 |
|
|
|
1740 |
|
|
info = (struct bfd_link_info *) inf;
|
1741 |
|
|
htab = elf_s390_hash_table (info);
|
1742 |
|
|
|
1743 |
|
|
if (htab->elf.dynamic_sections_created
|
1744 |
|
|
&& h->plt.refcount > 0
|
1745 |
|
|
&& (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
1746 |
|
|
|| h->root.type != bfd_link_hash_undefweak))
|
1747 |
|
|
{
|
1748 |
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
1749 |
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
1750 |
|
|
if (h->dynindx == -1
|
1751 |
|
|
&& !h->forced_local)
|
1752 |
|
|
{
|
1753 |
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
1754 |
|
|
return FALSE;
|
1755 |
|
|
}
|
1756 |
|
|
|
1757 |
|
|
if (info->shared
|
1758 |
|
|
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
|
1759 |
|
|
{
|
1760 |
|
|
asection *s = htab->splt;
|
1761 |
|
|
|
1762 |
|
|
/* If this is the first .plt entry, make room for the special
|
1763 |
|
|
first entry. */
|
1764 |
|
|
if (s->size == 0)
|
1765 |
|
|
s->size += PLT_FIRST_ENTRY_SIZE;
|
1766 |
|
|
|
1767 |
|
|
h->plt.offset = s->size;
|
1768 |
|
|
|
1769 |
|
|
/* If this symbol is not defined in a regular file, and we are
|
1770 |
|
|
not generating a shared library, then set the symbol to this
|
1771 |
|
|
location in the .plt. This is required to make function
|
1772 |
|
|
pointers compare as equal between the normal executable and
|
1773 |
|
|
the shared library. */
|
1774 |
|
|
if (! info->shared
|
1775 |
|
|
&& !h->def_regular)
|
1776 |
|
|
{
|
1777 |
|
|
h->root.u.def.section = s;
|
1778 |
|
|
h->root.u.def.value = h->plt.offset;
|
1779 |
|
|
}
|
1780 |
|
|
|
1781 |
|
|
/* Make room for this entry. */
|
1782 |
|
|
s->size += PLT_ENTRY_SIZE;
|
1783 |
|
|
|
1784 |
|
|
/* We also need to make an entry in the .got.plt section, which
|
1785 |
|
|
will be placed in the .got section by the linker script. */
|
1786 |
|
|
htab->sgotplt->size += GOT_ENTRY_SIZE;
|
1787 |
|
|
|
1788 |
|
|
/* We also need to make an entry in the .rela.plt section. */
|
1789 |
|
|
htab->srelplt->size += sizeof (Elf32_External_Rela);
|
1790 |
|
|
}
|
1791 |
|
|
else
|
1792 |
|
|
{
|
1793 |
|
|
h->plt.offset = (bfd_vma) -1;
|
1794 |
|
|
h->needs_plt = 0;
|
1795 |
|
|
elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
|
1796 |
|
|
}
|
1797 |
|
|
}
|
1798 |
|
|
else
|
1799 |
|
|
{
|
1800 |
|
|
h->plt.offset = (bfd_vma) -1;
|
1801 |
|
|
h->needs_plt = 0;
|
1802 |
|
|
elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
|
1803 |
|
|
}
|
1804 |
|
|
|
1805 |
|
|
/* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
|
1806 |
|
|
the binary, we can optimize a bit. IE32 and GOTIE32 get converted
|
1807 |
|
|
to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
|
1808 |
|
|
we can save the dynamic TLS relocation. */
|
1809 |
|
|
if (h->got.refcount > 0
|
1810 |
|
|
&& !info->shared
|
1811 |
|
|
&& h->dynindx == -1
|
1812 |
|
|
&& elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
|
1813 |
|
|
{
|
1814 |
|
|
if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
|
1815 |
|
|
/* For the GOTIE access without a literal pool entry the offset has
|
1816 |
|
|
to be stored somewhere. The immediate value in the instruction
|
1817 |
|
|
is not bit enough so the value is stored in the got. */
|
1818 |
|
|
{
|
1819 |
|
|
h->got.offset = htab->sgot->size;
|
1820 |
|
|
htab->sgot->size += GOT_ENTRY_SIZE;
|
1821 |
|
|
}
|
1822 |
|
|
else
|
1823 |
|
|
h->got.offset = (bfd_vma) -1;
|
1824 |
|
|
}
|
1825 |
|
|
else if (h->got.refcount > 0)
|
1826 |
|
|
{
|
1827 |
|
|
asection *s;
|
1828 |
|
|
bfd_boolean dyn;
|
1829 |
|
|
int tls_type = elf_s390_hash_entry(h)->tls_type;
|
1830 |
|
|
|
1831 |
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
1832 |
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
1833 |
|
|
if (h->dynindx == -1
|
1834 |
|
|
&& !h->forced_local)
|
1835 |
|
|
{
|
1836 |
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
1837 |
|
|
return FALSE;
|
1838 |
|
|
}
|
1839 |
|
|
|
1840 |
|
|
s = htab->sgot;
|
1841 |
|
|
h->got.offset = s->size;
|
1842 |
|
|
s->size += GOT_ENTRY_SIZE;
|
1843 |
|
|
/* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
|
1844 |
|
|
if (tls_type == GOT_TLS_GD)
|
1845 |
|
|
s->size += GOT_ENTRY_SIZE;
|
1846 |
|
|
dyn = htab->elf.dynamic_sections_created;
|
1847 |
|
|
/* R_390_TLS_IE32 needs one dynamic relocation,
|
1848 |
|
|
R_390_TLS_GD32 needs one if local symbol and two if global. */
|
1849 |
|
|
if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
|
1850 |
|
|
|| tls_type >= GOT_TLS_IE)
|
1851 |
|
|
htab->srelgot->size += sizeof (Elf32_External_Rela);
|
1852 |
|
|
else if (tls_type == GOT_TLS_GD)
|
1853 |
|
|
htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
|
1854 |
|
|
else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
1855 |
|
|
|| h->root.type != bfd_link_hash_undefweak)
|
1856 |
|
|
&& (info->shared
|
1857 |
|
|
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
|
1858 |
|
|
htab->srelgot->size += sizeof (Elf32_External_Rela);
|
1859 |
|
|
}
|
1860 |
|
|
else
|
1861 |
|
|
h->got.offset = (bfd_vma) -1;
|
1862 |
|
|
|
1863 |
|
|
eh = (struct elf_s390_link_hash_entry *) h;
|
1864 |
|
|
if (eh->dyn_relocs == NULL)
|
1865 |
|
|
return TRUE;
|
1866 |
|
|
|
1867 |
|
|
/* In the shared -Bsymbolic case, discard space allocated for
|
1868 |
|
|
dynamic pc-relative relocs against symbols which turn out to be
|
1869 |
|
|
defined in regular objects. For the normal shared case, discard
|
1870 |
|
|
space for pc-relative relocs that have become local due to symbol
|
1871 |
|
|
visibility changes. */
|
1872 |
|
|
|
1873 |
|
|
if (info->shared)
|
1874 |
|
|
{
|
1875 |
|
|
if (SYMBOL_REFERENCES_LOCAL (info, h))
|
1876 |
|
|
{
|
1877 |
|
|
struct elf_s390_dyn_relocs **pp;
|
1878 |
|
|
|
1879 |
|
|
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
|
1880 |
|
|
{
|
1881 |
|
|
p->count -= p->pc_count;
|
1882 |
|
|
p->pc_count = 0;
|
1883 |
|
|
if (p->count == 0)
|
1884 |
|
|
*pp = p->next;
|
1885 |
|
|
else
|
1886 |
|
|
pp = &p->next;
|
1887 |
|
|
}
|
1888 |
|
|
}
|
1889 |
|
|
|
1890 |
|
|
/* Also discard relocs on undefined weak syms with non-default
|
1891 |
|
|
visibility. */
|
1892 |
|
|
if (eh->dyn_relocs != NULL
|
1893 |
|
|
&& h->root.type == bfd_link_hash_undefweak)
|
1894 |
|
|
{
|
1895 |
|
|
if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
|
1896 |
|
|
eh->dyn_relocs = NULL;
|
1897 |
|
|
|
1898 |
|
|
/* Make sure undefined weak symbols are output as a dynamic
|
1899 |
|
|
symbol in PIEs. */
|
1900 |
|
|
else if (h->dynindx == -1
|
1901 |
|
|
&& !h->forced_local)
|
1902 |
|
|
{
|
1903 |
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
1904 |
|
|
return FALSE;
|
1905 |
|
|
}
|
1906 |
|
|
}
|
1907 |
|
|
}
|
1908 |
|
|
else if (ELIMINATE_COPY_RELOCS)
|
1909 |
|
|
{
|
1910 |
|
|
/* For the non-shared case, discard space for relocs against
|
1911 |
|
|
symbols which turn out to need copy relocs or are not
|
1912 |
|
|
dynamic. */
|
1913 |
|
|
|
1914 |
|
|
if (!h->non_got_ref
|
1915 |
|
|
&& ((h->def_dynamic
|
1916 |
|
|
&& !h->def_regular)
|
1917 |
|
|
|| (htab->elf.dynamic_sections_created
|
1918 |
|
|
&& (h->root.type == bfd_link_hash_undefweak
|
1919 |
|
|
|| h->root.type == bfd_link_hash_undefined))))
|
1920 |
|
|
{
|
1921 |
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
1922 |
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
1923 |
|
|
if (h->dynindx == -1
|
1924 |
|
|
&& !h->forced_local)
|
1925 |
|
|
{
|
1926 |
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
1927 |
|
|
return FALSE;
|
1928 |
|
|
}
|
1929 |
|
|
|
1930 |
|
|
/* If that succeeded, we know we'll be keeping all the
|
1931 |
|
|
relocs. */
|
1932 |
|
|
if (h->dynindx != -1)
|
1933 |
|
|
goto keep;
|
1934 |
|
|
}
|
1935 |
|
|
|
1936 |
|
|
eh->dyn_relocs = NULL;
|
1937 |
|
|
|
1938 |
|
|
keep: ;
|
1939 |
|
|
}
|
1940 |
|
|
|
1941 |
|
|
/* Finally, allocate space. */
|
1942 |
|
|
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
1943 |
|
|
{
|
1944 |
|
|
asection *sreloc = elf_section_data (p->sec)->sreloc;
|
1945 |
|
|
|
1946 |
|
|
sreloc->size += p->count * sizeof (Elf32_External_Rela);
|
1947 |
|
|
}
|
1948 |
|
|
|
1949 |
|
|
return TRUE;
|
1950 |
|
|
}
|
1951 |
|
|
|
1952 |
|
|
/* Find any dynamic relocs that apply to read-only sections. */
|
1953 |
|
|
|
1954 |
|
|
static bfd_boolean
|
1955 |
|
|
readonly_dynrelocs (h, inf)
|
1956 |
|
|
struct elf_link_hash_entry *h;
|
1957 |
|
|
PTR inf;
|
1958 |
|
|
{
|
1959 |
|
|
struct elf_s390_link_hash_entry *eh;
|
1960 |
|
|
struct elf_s390_dyn_relocs *p;
|
1961 |
|
|
|
1962 |
|
|
if (h->root.type == bfd_link_hash_warning)
|
1963 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
1964 |
|
|
|
1965 |
|
|
eh = (struct elf_s390_link_hash_entry *) h;
|
1966 |
|
|
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
1967 |
|
|
{
|
1968 |
|
|
asection *s = p->sec->output_section;
|
1969 |
|
|
|
1970 |
|
|
if (s != NULL && (s->flags & SEC_READONLY) != 0)
|
1971 |
|
|
{
|
1972 |
|
|
struct bfd_link_info *info = (struct bfd_link_info *) inf;
|
1973 |
|
|
|
1974 |
|
|
info->flags |= DF_TEXTREL;
|
1975 |
|
|
|
1976 |
|
|
/* Not an error, just cut short the traversal. */
|
1977 |
|
|
return FALSE;
|
1978 |
|
|
}
|
1979 |
|
|
}
|
1980 |
|
|
return TRUE;
|
1981 |
|
|
}
|
1982 |
|
|
|
1983 |
|
|
/* Set the sizes of the dynamic sections. */
|
1984 |
|
|
|
1985 |
|
|
static bfd_boolean
|
1986 |
|
|
elf_s390_size_dynamic_sections (output_bfd, info)
|
1987 |
|
|
bfd *output_bfd ATTRIBUTE_UNUSED;
|
1988 |
|
|
struct bfd_link_info *info;
|
1989 |
|
|
{
|
1990 |
|
|
struct elf_s390_link_hash_table *htab;
|
1991 |
|
|
bfd *dynobj;
|
1992 |
|
|
asection *s;
|
1993 |
|
|
bfd_boolean relocs;
|
1994 |
|
|
bfd *ibfd;
|
1995 |
|
|
|
1996 |
|
|
htab = elf_s390_hash_table (info);
|
1997 |
|
|
dynobj = htab->elf.dynobj;
|
1998 |
|
|
if (dynobj == NULL)
|
1999 |
|
|
abort ();
|
2000 |
|
|
|
2001 |
|
|
if (htab->elf.dynamic_sections_created)
|
2002 |
|
|
{
|
2003 |
|
|
/* Set the contents of the .interp section to the interpreter. */
|
2004 |
|
|
if (info->executable)
|
2005 |
|
|
{
|
2006 |
|
|
s = bfd_get_section_by_name (dynobj, ".interp");
|
2007 |
|
|
if (s == NULL)
|
2008 |
|
|
abort ();
|
2009 |
|
|
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
|
2010 |
|
|
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
2011 |
|
|
}
|
2012 |
|
|
}
|
2013 |
|
|
|
2014 |
|
|
/* Set up .got offsets for local syms, and space for local dynamic
|
2015 |
|
|
relocs. */
|
2016 |
|
|
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
|
2017 |
|
|
{
|
2018 |
|
|
bfd_signed_vma *local_got;
|
2019 |
|
|
bfd_signed_vma *end_local_got;
|
2020 |
|
|
char *local_tls_type;
|
2021 |
|
|
bfd_size_type locsymcount;
|
2022 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
2023 |
|
|
asection *srela;
|
2024 |
|
|
|
2025 |
|
|
if (! is_s390_elf (ibfd))
|
2026 |
|
|
continue;
|
2027 |
|
|
|
2028 |
|
|
for (s = ibfd->sections; s != NULL; s = s->next)
|
2029 |
|
|
{
|
2030 |
|
|
struct elf_s390_dyn_relocs *p;
|
2031 |
|
|
|
2032 |
|
|
for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
|
2033 |
|
|
{
|
2034 |
|
|
if (!bfd_is_abs_section (p->sec)
|
2035 |
|
|
&& bfd_is_abs_section (p->sec->output_section))
|
2036 |
|
|
{
|
2037 |
|
|
/* Input section has been discarded, either because
|
2038 |
|
|
it is a copy of a linkonce section or due to
|
2039 |
|
|
linker script /DISCARD/, so we'll be discarding
|
2040 |
|
|
the relocs too. */
|
2041 |
|
|
}
|
2042 |
|
|
else if (p->count != 0)
|
2043 |
|
|
{
|
2044 |
|
|
srela = elf_section_data (p->sec)->sreloc;
|
2045 |
|
|
srela->size += p->count * sizeof (Elf32_External_Rela);
|
2046 |
|
|
if ((p->sec->output_section->flags & SEC_READONLY) != 0)
|
2047 |
|
|
info->flags |= DF_TEXTREL;
|
2048 |
|
|
}
|
2049 |
|
|
}
|
2050 |
|
|
}
|
2051 |
|
|
|
2052 |
|
|
local_got = elf_local_got_refcounts (ibfd);
|
2053 |
|
|
if (!local_got)
|
2054 |
|
|
continue;
|
2055 |
|
|
|
2056 |
|
|
symtab_hdr = &elf_symtab_hdr (ibfd);
|
2057 |
|
|
locsymcount = symtab_hdr->sh_info;
|
2058 |
|
|
end_local_got = local_got + locsymcount;
|
2059 |
|
|
local_tls_type = elf_s390_local_got_tls_type (ibfd);
|
2060 |
|
|
s = htab->sgot;
|
2061 |
|
|
srela = htab->srelgot;
|
2062 |
|
|
for (; local_got < end_local_got; ++local_got, ++local_tls_type)
|
2063 |
|
|
{
|
2064 |
|
|
if (*local_got > 0)
|
2065 |
|
|
{
|
2066 |
|
|
*local_got = s->size;
|
2067 |
|
|
s->size += GOT_ENTRY_SIZE;
|
2068 |
|
|
if (*local_tls_type == GOT_TLS_GD)
|
2069 |
|
|
s->size += GOT_ENTRY_SIZE;
|
2070 |
|
|
if (info->shared)
|
2071 |
|
|
srela->size += sizeof (Elf32_External_Rela);
|
2072 |
|
|
}
|
2073 |
|
|
else
|
2074 |
|
|
*local_got = (bfd_vma) -1;
|
2075 |
|
|
}
|
2076 |
|
|
}
|
2077 |
|
|
|
2078 |
|
|
if (htab->tls_ldm_got.refcount > 0)
|
2079 |
|
|
{
|
2080 |
|
|
/* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
|
2081 |
|
|
relocs. */
|
2082 |
|
|
htab->tls_ldm_got.offset = htab->sgot->size;
|
2083 |
|
|
htab->sgot->size += 2 * GOT_ENTRY_SIZE;
|
2084 |
|
|
htab->srelgot->size += sizeof (Elf32_External_Rela);
|
2085 |
|
|
}
|
2086 |
|
|
else
|
2087 |
|
|
htab->tls_ldm_got.offset = -1;
|
2088 |
|
|
|
2089 |
|
|
/* Allocate global sym .plt and .got entries, and space for global
|
2090 |
|
|
sym dynamic relocs. */
|
2091 |
|
|
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
|
2092 |
|
|
|
2093 |
|
|
/* We now have determined the sizes of the various dynamic sections.
|
2094 |
|
|
Allocate memory for them. */
|
2095 |
|
|
relocs = FALSE;
|
2096 |
|
|
for (s = dynobj->sections; s != NULL; s = s->next)
|
2097 |
|
|
{
|
2098 |
|
|
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
2099 |
|
|
continue;
|
2100 |
|
|
|
2101 |
|
|
if (s == htab->splt
|
2102 |
|
|
|| s == htab->sgot
|
2103 |
|
|
|| s == htab->sgotplt
|
2104 |
|
|
|| s == htab->sdynbss)
|
2105 |
|
|
{
|
2106 |
|
|
/* Strip this section if we don't need it; see the
|
2107 |
|
|
comment below. */
|
2108 |
|
|
}
|
2109 |
|
|
else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
|
2110 |
|
|
{
|
2111 |
|
|
if (s->size != 0)
|
2112 |
|
|
relocs = TRUE;
|
2113 |
|
|
|
2114 |
|
|
/* We use the reloc_count field as a counter if we need
|
2115 |
|
|
to copy relocs into the output file. */
|
2116 |
|
|
s->reloc_count = 0;
|
2117 |
|
|
}
|
2118 |
|
|
else
|
2119 |
|
|
{
|
2120 |
|
|
/* It's not one of our sections, so don't allocate space. */
|
2121 |
|
|
continue;
|
2122 |
|
|
}
|
2123 |
|
|
|
2124 |
|
|
if (s->size == 0)
|
2125 |
|
|
{
|
2126 |
|
|
/* If we don't need this section, strip it from the
|
2127 |
|
|
output file. This is to handle .rela.bss and
|
2128 |
|
|
.rela.plt. We must create it in
|
2129 |
|
|
create_dynamic_sections, because it must be created
|
2130 |
|
|
before the linker maps input sections to output
|
2131 |
|
|
sections. The linker does that before
|
2132 |
|
|
adjust_dynamic_symbol is called, and it is that
|
2133 |
|
|
function which decides whether anything needs to go
|
2134 |
|
|
into these sections. */
|
2135 |
|
|
|
2136 |
|
|
s->flags |= SEC_EXCLUDE;
|
2137 |
|
|
continue;
|
2138 |
|
|
}
|
2139 |
|
|
|
2140 |
|
|
if ((s->flags & SEC_HAS_CONTENTS) == 0)
|
2141 |
|
|
continue;
|
2142 |
|
|
|
2143 |
|
|
/* Allocate memory for the section contents. We use bfd_zalloc
|
2144 |
|
|
here in case unused entries are not reclaimed before the
|
2145 |
|
|
section's contents are written out. This should not happen,
|
2146 |
|
|
but this way if it does, we get a R_390_NONE reloc instead
|
2147 |
|
|
of garbage. */
|
2148 |
|
|
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
|
2149 |
|
|
if (s->contents == NULL)
|
2150 |
|
|
return FALSE;
|
2151 |
|
|
}
|
2152 |
|
|
|
2153 |
|
|
if (htab->elf.dynamic_sections_created)
|
2154 |
|
|
{
|
2155 |
|
|
/* Add some entries to the .dynamic section. We fill in the
|
2156 |
|
|
values later, in elf_s390_finish_dynamic_sections, but we
|
2157 |
|
|
must add the entries now so that we get the correct size for
|
2158 |
|
|
the .dynamic section. The DT_DEBUG entry is filled in by the
|
2159 |
|
|
dynamic linker and used by the debugger. */
|
2160 |
|
|
#define add_dynamic_entry(TAG, VAL) \
|
2161 |
|
|
_bfd_elf_add_dynamic_entry (info, TAG, VAL)
|
2162 |
|
|
|
2163 |
|
|
if (info->executable)
|
2164 |
|
|
{
|
2165 |
|
|
if (!add_dynamic_entry (DT_DEBUG, 0))
|
2166 |
|
|
return FALSE;
|
2167 |
|
|
}
|
2168 |
|
|
|
2169 |
|
|
if (htab->splt->size != 0)
|
2170 |
|
|
{
|
2171 |
|
|
if (!add_dynamic_entry (DT_PLTGOT, 0)
|
2172 |
|
|
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
|
2173 |
|
|
|| !add_dynamic_entry (DT_PLTREL, DT_RELA)
|
2174 |
|
|
|| !add_dynamic_entry (DT_JMPREL, 0))
|
2175 |
|
|
return FALSE;
|
2176 |
|
|
}
|
2177 |
|
|
|
2178 |
|
|
if (relocs)
|
2179 |
|
|
{
|
2180 |
|
|
if (!add_dynamic_entry (DT_RELA, 0)
|
2181 |
|
|
|| !add_dynamic_entry (DT_RELASZ, 0)
|
2182 |
|
|
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
|
2183 |
|
|
return FALSE;
|
2184 |
|
|
|
2185 |
|
|
/* If any dynamic relocs apply to a read-only section,
|
2186 |
|
|
then we need a DT_TEXTREL entry. */
|
2187 |
|
|
if ((info->flags & DF_TEXTREL) == 0)
|
2188 |
|
|
elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
|
2189 |
|
|
(PTR) info);
|
2190 |
|
|
|
2191 |
|
|
if ((info->flags & DF_TEXTREL) != 0)
|
2192 |
|
|
{
|
2193 |
|
|
if (!add_dynamic_entry (DT_TEXTREL, 0))
|
2194 |
|
|
return FALSE;
|
2195 |
|
|
}
|
2196 |
|
|
}
|
2197 |
|
|
}
|
2198 |
|
|
#undef add_dynamic_entry
|
2199 |
|
|
|
2200 |
|
|
return TRUE;
|
2201 |
|
|
}
|
2202 |
|
|
|
2203 |
|
|
/* Return the base VMA address which should be subtracted from real addresses
|
2204 |
|
|
when resolving @dtpoff relocation.
|
2205 |
|
|
This is PT_TLS segment p_vaddr. */
|
2206 |
|
|
|
2207 |
|
|
static bfd_vma
|
2208 |
|
|
dtpoff_base (info)
|
2209 |
|
|
struct bfd_link_info *info;
|
2210 |
|
|
{
|
2211 |
|
|
/* If tls_sec is NULL, we should have signalled an error already. */
|
2212 |
|
|
if (elf_hash_table (info)->tls_sec == NULL)
|
2213 |
|
|
return 0;
|
2214 |
|
|
return elf_hash_table (info)->tls_sec->vma;
|
2215 |
|
|
}
|
2216 |
|
|
|
2217 |
|
|
/* Return the relocation value for @tpoff relocation
|
2218 |
|
|
if STT_TLS virtual address is ADDRESS. */
|
2219 |
|
|
|
2220 |
|
|
static bfd_vma
|
2221 |
|
|
tpoff (info, address)
|
2222 |
|
|
struct bfd_link_info *info;
|
2223 |
|
|
bfd_vma address;
|
2224 |
|
|
{
|
2225 |
|
|
struct elf_link_hash_table *htab = elf_hash_table (info);
|
2226 |
|
|
|
2227 |
|
|
/* If tls_sec is NULL, we should have signalled an error already. */
|
2228 |
|
|
if (htab->tls_sec == NULL)
|
2229 |
|
|
return 0;
|
2230 |
|
|
return htab->tls_size + htab->tls_sec->vma - address;
|
2231 |
|
|
}
|
2232 |
|
|
|
2233 |
|
|
/* Complain if TLS instruction relocation is against an invalid
|
2234 |
|
|
instruction. */
|
2235 |
|
|
|
2236 |
|
|
static void
|
2237 |
|
|
invalid_tls_insn (input_bfd, input_section, rel)
|
2238 |
|
|
bfd *input_bfd;
|
2239 |
|
|
asection *input_section;
|
2240 |
|
|
Elf_Internal_Rela *rel;
|
2241 |
|
|
{
|
2242 |
|
|
reloc_howto_type *howto;
|
2243 |
|
|
|
2244 |
|
|
howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
|
2245 |
|
|
(*_bfd_error_handler)
|
2246 |
|
|
(_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
|
2247 |
|
|
input_bfd,
|
2248 |
|
|
input_section,
|
2249 |
|
|
(long) rel->r_offset,
|
2250 |
|
|
howto->name);
|
2251 |
|
|
bfd_set_error (bfd_error_bad_value);
|
2252 |
|
|
}
|
2253 |
|
|
|
2254 |
|
|
/* Relocate a 390 ELF section. */
|
2255 |
|
|
|
2256 |
|
|
static bfd_boolean
|
2257 |
|
|
elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
|
2258 |
|
|
contents, relocs, local_syms, local_sections)
|
2259 |
|
|
bfd *output_bfd;
|
2260 |
|
|
struct bfd_link_info *info;
|
2261 |
|
|
bfd *input_bfd;
|
2262 |
|
|
asection *input_section;
|
2263 |
|
|
bfd_byte *contents;
|
2264 |
|
|
Elf_Internal_Rela *relocs;
|
2265 |
|
|
Elf_Internal_Sym *local_syms;
|
2266 |
|
|
asection **local_sections;
|
2267 |
|
|
{
|
2268 |
|
|
struct elf_s390_link_hash_table *htab;
|
2269 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
2270 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
2271 |
|
|
bfd_vma *local_got_offsets;
|
2272 |
|
|
Elf_Internal_Rela *rel;
|
2273 |
|
|
Elf_Internal_Rela *relend;
|
2274 |
|
|
|
2275 |
|
|
BFD_ASSERT (is_s390_elf (input_bfd));
|
2276 |
|
|
|
2277 |
|
|
htab = elf_s390_hash_table (info);
|
2278 |
|
|
symtab_hdr = &elf_symtab_hdr (input_bfd);
|
2279 |
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
2280 |
|
|
local_got_offsets = elf_local_got_offsets (input_bfd);
|
2281 |
|
|
|
2282 |
|
|
rel = relocs;
|
2283 |
|
|
relend = relocs + input_section->reloc_count;
|
2284 |
|
|
for (; rel < relend; rel++)
|
2285 |
|
|
{
|
2286 |
|
|
unsigned int r_type;
|
2287 |
|
|
reloc_howto_type *howto;
|
2288 |
|
|
unsigned long r_symndx;
|
2289 |
|
|
struct elf_link_hash_entry *h;
|
2290 |
|
|
Elf_Internal_Sym *sym;
|
2291 |
|
|
asection *sec;
|
2292 |
|
|
bfd_vma off;
|
2293 |
|
|
bfd_vma relocation;
|
2294 |
|
|
bfd_boolean unresolved_reloc;
|
2295 |
|
|
bfd_reloc_status_type r;
|
2296 |
|
|
int tls_type;
|
2297 |
|
|
|
2298 |
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
2299 |
|
|
if (r_type == (int) R_390_GNU_VTINHERIT
|
2300 |
|
|
|| r_type == (int) R_390_GNU_VTENTRY)
|
2301 |
|
|
continue;
|
2302 |
|
|
if (r_type >= (int) R_390_max)
|
2303 |
|
|
{
|
2304 |
|
|
bfd_set_error (bfd_error_bad_value);
|
2305 |
|
|
return FALSE;
|
2306 |
|
|
}
|
2307 |
|
|
|
2308 |
|
|
howto = elf_howto_table + r_type;
|
2309 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
2310 |
|
|
|
2311 |
|
|
h = NULL;
|
2312 |
|
|
sym = NULL;
|
2313 |
|
|
sec = NULL;
|
2314 |
|
|
unresolved_reloc = FALSE;
|
2315 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
2316 |
|
|
{
|
2317 |
|
|
sym = local_syms + r_symndx;
|
2318 |
|
|
sec = local_sections[r_symndx];
|
2319 |
|
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
2320 |
|
|
}
|
2321 |
|
|
else
|
2322 |
|
|
{
|
2323 |
|
|
bfd_boolean warned ATTRIBUTE_UNUSED;
|
2324 |
|
|
|
2325 |
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
2326 |
|
|
r_symndx, symtab_hdr, sym_hashes,
|
2327 |
|
|
h, sec, relocation,
|
2328 |
|
|
unresolved_reloc, warned);
|
2329 |
|
|
}
|
2330 |
|
|
|
2331 |
|
|
if (sec != NULL && elf_discarded_section (sec))
|
2332 |
|
|
{
|
2333 |
|
|
/* For relocs against symbols from removed linkonce sections,
|
2334 |
|
|
or sections discarded by a linker script, we just want the
|
2335 |
|
|
section contents zeroed. Avoid any special processing. */
|
2336 |
|
|
_bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
|
2337 |
|
|
rel->r_info = 0;
|
2338 |
|
|
rel->r_addend = 0;
|
2339 |
|
|
continue;
|
2340 |
|
|
}
|
2341 |
|
|
|
2342 |
|
|
if (info->relocatable)
|
2343 |
|
|
continue;
|
2344 |
|
|
|
2345 |
|
|
switch (r_type)
|
2346 |
|
|
{
|
2347 |
|
|
case R_390_GOTPLT12:
|
2348 |
|
|
case R_390_GOTPLT16:
|
2349 |
|
|
case R_390_GOTPLT20:
|
2350 |
|
|
case R_390_GOTPLT32:
|
2351 |
|
|
case R_390_GOTPLTENT:
|
2352 |
|
|
/* There are three cases for a GOTPLT relocation. 1) The
|
2353 |
|
|
relocation is against the jump slot entry of a plt that
|
2354 |
|
|
will get emitted to the output file. 2) The relocation
|
2355 |
|
|
is against the jump slot of a plt entry that has been
|
2356 |
|
|
removed. elf_s390_adjust_gotplt has created a GOT entry
|
2357 |
|
|
as replacement. 3) The relocation is against a local symbol.
|
2358 |
|
|
Cases 2) and 3) are the same as the GOT relocation code
|
2359 |
|
|
so we just have to test for case 1 and fall through for
|
2360 |
|
|
the other two. */
|
2361 |
|
|
if (h != NULL && h->plt.offset != (bfd_vma) -1)
|
2362 |
|
|
{
|
2363 |
|
|
bfd_vma plt_index;
|
2364 |
|
|
|
2365 |
|
|
/* Calc. index no.
|
2366 |
|
|
Current offset - size first entry / entry size. */
|
2367 |
|
|
plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
|
2368 |
|
|
PLT_ENTRY_SIZE;
|
2369 |
|
|
|
2370 |
|
|
/* Offset in GOT is PLT index plus GOT headers(3) times 4,
|
2371 |
|
|
addr & GOT addr. */
|
2372 |
|
|
relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
|
2373 |
|
|
unresolved_reloc = FALSE;
|
2374 |
|
|
|
2375 |
|
|
if (r_type == R_390_GOTPLTENT)
|
2376 |
|
|
relocation += htab->sgot->output_section->vma;
|
2377 |
|
|
break;
|
2378 |
|
|
}
|
2379 |
|
|
/* Fall through. */
|
2380 |
|
|
|
2381 |
|
|
case R_390_GOT12:
|
2382 |
|
|
case R_390_GOT16:
|
2383 |
|
|
case R_390_GOT20:
|
2384 |
|
|
case R_390_GOT32:
|
2385 |
|
|
case R_390_GOTENT:
|
2386 |
|
|
/* Relocation is to the entry for this symbol in the global
|
2387 |
|
|
offset table. */
|
2388 |
|
|
if (htab->sgot == NULL)
|
2389 |
|
|
abort ();
|
2390 |
|
|
|
2391 |
|
|
if (h != NULL)
|
2392 |
|
|
{
|
2393 |
|
|
bfd_boolean dyn;
|
2394 |
|
|
|
2395 |
|
|
off = h->got.offset;
|
2396 |
|
|
dyn = htab->elf.dynamic_sections_created;
|
2397 |
|
|
if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
|
2398 |
|
|
|| (info->shared
|
2399 |
|
|
&& (info->symbolic
|
2400 |
|
|
|| h->dynindx == -1
|
2401 |
|
|
|| h->forced_local)
|
2402 |
|
|
&& h->def_regular)
|
2403 |
|
|
|| (ELF_ST_VISIBILITY (h->other)
|
2404 |
|
|
&& h->root.type == bfd_link_hash_undefweak))
|
2405 |
|
|
{
|
2406 |
|
|
/* This is actually a static link, or it is a
|
2407 |
|
|
-Bsymbolic link and the symbol is defined
|
2408 |
|
|
locally, or the symbol was forced to be local
|
2409 |
|
|
because of a version file. We must initialize
|
2410 |
|
|
this entry in the global offset table. Since the
|
2411 |
|
|
offset must always be a multiple of 2, we use the
|
2412 |
|
|
least significant bit to record whether we have
|
2413 |
|
|
initialized it already.
|
2414 |
|
|
|
2415 |
|
|
When doing a dynamic link, we create a .rel.got
|
2416 |
|
|
relocation entry to initialize the value. This
|
2417 |
|
|
is done in the finish_dynamic_symbol routine. */
|
2418 |
|
|
if ((off & 1) != 0)
|
2419 |
|
|
off &= ~1;
|
2420 |
|
|
else
|
2421 |
|
|
{
|
2422 |
|
|
bfd_put_32 (output_bfd, relocation,
|
2423 |
|
|
htab->sgot->contents + off);
|
2424 |
|
|
h->got.offset |= 1;
|
2425 |
|
|
}
|
2426 |
|
|
}
|
2427 |
|
|
else
|
2428 |
|
|
unresolved_reloc = FALSE;
|
2429 |
|
|
}
|
2430 |
|
|
else
|
2431 |
|
|
{
|
2432 |
|
|
if (local_got_offsets == NULL)
|
2433 |
|
|
abort ();
|
2434 |
|
|
|
2435 |
|
|
off = local_got_offsets[r_symndx];
|
2436 |
|
|
|
2437 |
|
|
/* The offset must always be a multiple of 4. We use
|
2438 |
|
|
the least significant bit to record whether we have
|
2439 |
|
|
already generated the necessary reloc. */
|
2440 |
|
|
if ((off & 1) != 0)
|
2441 |
|
|
off &= ~1;
|
2442 |
|
|
else
|
2443 |
|
|
{
|
2444 |
|
|
bfd_put_32 (output_bfd, relocation,
|
2445 |
|
|
htab->sgot->contents + off);
|
2446 |
|
|
|
2447 |
|
|
if (info->shared)
|
2448 |
|
|
{
|
2449 |
|
|
asection *srelgot;
|
2450 |
|
|
Elf_Internal_Rela outrel;
|
2451 |
|
|
bfd_byte *loc;
|
2452 |
|
|
|
2453 |
|
|
srelgot = htab->srelgot;
|
2454 |
|
|
if (srelgot == NULL)
|
2455 |
|
|
abort ();
|
2456 |
|
|
|
2457 |
|
|
outrel.r_offset = (htab->sgot->output_section->vma
|
2458 |
|
|
+ htab->sgot->output_offset
|
2459 |
|
|
+ off);
|
2460 |
|
|
outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
|
2461 |
|
|
outrel.r_addend = relocation;
|
2462 |
|
|
loc = srelgot->contents;
|
2463 |
|
|
loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
|
2464 |
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
2465 |
|
|
}
|
2466 |
|
|
|
2467 |
|
|
local_got_offsets[r_symndx] |= 1;
|
2468 |
|
|
}
|
2469 |
|
|
}
|
2470 |
|
|
|
2471 |
|
|
if (off >= (bfd_vma) -2)
|
2472 |
|
|
abort ();
|
2473 |
|
|
|
2474 |
|
|
relocation = htab->sgot->output_offset + off;
|
2475 |
|
|
|
2476 |
|
|
/* For @GOTENT the relocation is against the offset between
|
2477 |
|
|
the instruction and the symbols entry in the GOT and not
|
2478 |
|
|
between the start of the GOT and the symbols entry. We
|
2479 |
|
|
add the vma of the GOT to get the correct value. */
|
2480 |
|
|
if ( r_type == R_390_GOTENT
|
2481 |
|
|
|| r_type == R_390_GOTPLTENT)
|
2482 |
|
|
relocation += htab->sgot->output_section->vma;
|
2483 |
|
|
|
2484 |
|
|
break;
|
2485 |
|
|
|
2486 |
|
|
case R_390_GOTOFF16:
|
2487 |
|
|
case R_390_GOTOFF32:
|
2488 |
|
|
/* Relocation is relative to the start of the global offset
|
2489 |
|
|
table. */
|
2490 |
|
|
|
2491 |
|
|
/* Note that sgot->output_offset is not involved in this
|
2492 |
|
|
calculation. We always want the start of .got. If we
|
2493 |
|
|
defined _GLOBAL_OFFSET_TABLE in a different way, as is
|
2494 |
|
|
permitted by the ABI, we might have to change this
|
2495 |
|
|
calculation. */
|
2496 |
|
|
relocation -= htab->sgot->output_section->vma;
|
2497 |
|
|
break;
|
2498 |
|
|
|
2499 |
|
|
case R_390_GOTPC:
|
2500 |
|
|
case R_390_GOTPCDBL:
|
2501 |
|
|
/* Use global offset table as symbol value. */
|
2502 |
|
|
relocation = htab->sgot->output_section->vma;
|
2503 |
|
|
unresolved_reloc = FALSE;
|
2504 |
|
|
break;
|
2505 |
|
|
|
2506 |
|
|
case R_390_PLT16DBL:
|
2507 |
|
|
case R_390_PLT32DBL:
|
2508 |
|
|
case R_390_PLT32:
|
2509 |
|
|
/* Relocation is to the entry for this symbol in the
|
2510 |
|
|
procedure linkage table. */
|
2511 |
|
|
|
2512 |
|
|
/* Resolve a PLT32 reloc against a local symbol directly,
|
2513 |
|
|
without using the procedure linkage table. */
|
2514 |
|
|
if (h == NULL)
|
2515 |
|
|
break;
|
2516 |
|
|
|
2517 |
|
|
if (h->plt.offset == (bfd_vma) -1
|
2518 |
|
|
|| htab->splt == NULL)
|
2519 |
|
|
{
|
2520 |
|
|
/* We didn't make a PLT entry for this symbol. This
|
2521 |
|
|
happens when statically linking PIC code, or when
|
2522 |
|
|
using -Bsymbolic. */
|
2523 |
|
|
break;
|
2524 |
|
|
}
|
2525 |
|
|
|
2526 |
|
|
relocation = (htab->splt->output_section->vma
|
2527 |
|
|
+ htab->splt->output_offset
|
2528 |
|
|
+ h->plt.offset);
|
2529 |
|
|
unresolved_reloc = FALSE;
|
2530 |
|
|
break;
|
2531 |
|
|
|
2532 |
|
|
case R_390_PLTOFF16:
|
2533 |
|
|
case R_390_PLTOFF32:
|
2534 |
|
|
/* Relocation is to the entry for this symbol in the
|
2535 |
|
|
procedure linkage table relative to the start of the GOT. */
|
2536 |
|
|
|
2537 |
|
|
/* For local symbols or if we didn't make a PLT entry for
|
2538 |
|
|
this symbol resolve the symbol directly. */
|
2539 |
|
|
if ( h == NULL
|
2540 |
|
|
|| h->plt.offset == (bfd_vma) -1
|
2541 |
|
|
|| htab->splt == NULL)
|
2542 |
|
|
{
|
2543 |
|
|
relocation -= htab->sgot->output_section->vma;
|
2544 |
|
|
break;
|
2545 |
|
|
}
|
2546 |
|
|
|
2547 |
|
|
relocation = (htab->splt->output_section->vma
|
2548 |
|
|
+ htab->splt->output_offset
|
2549 |
|
|
+ h->plt.offset
|
2550 |
|
|
- htab->sgot->output_section->vma);
|
2551 |
|
|
unresolved_reloc = FALSE;
|
2552 |
|
|
break;
|
2553 |
|
|
|
2554 |
|
|
case R_390_8:
|
2555 |
|
|
case R_390_16:
|
2556 |
|
|
case R_390_32:
|
2557 |
|
|
case R_390_PC16:
|
2558 |
|
|
case R_390_PC16DBL:
|
2559 |
|
|
case R_390_PC32DBL:
|
2560 |
|
|
case R_390_PC32:
|
2561 |
|
|
if ((input_section->flags & SEC_ALLOC) == 0)
|
2562 |
|
|
break;
|
2563 |
|
|
|
2564 |
|
|
if ((info->shared
|
2565 |
|
|
&& (h == NULL
|
2566 |
|
|
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
2567 |
|
|
|| h->root.type != bfd_link_hash_undefweak)
|
2568 |
|
|
&& ((r_type != R_390_PC16
|
2569 |
|
|
&& r_type != R_390_PC16DBL
|
2570 |
|
|
&& r_type != R_390_PC32DBL
|
2571 |
|
|
&& r_type != R_390_PC32)
|
2572 |
|
|
|| (h != NULL
|
2573 |
|
|
&& !SYMBOL_REFERENCES_LOCAL (info, h))))
|
2574 |
|
|
|| (ELIMINATE_COPY_RELOCS
|
2575 |
|
|
&& !info->shared
|
2576 |
|
|
&& h != NULL
|
2577 |
|
|
&& h->dynindx != -1
|
2578 |
|
|
&& !h->non_got_ref
|
2579 |
|
|
&& ((h->def_dynamic
|
2580 |
|
|
&& !h->def_regular)
|
2581 |
|
|
|| h->root.type == bfd_link_hash_undefweak
|
2582 |
|
|
|| h->root.type == bfd_link_hash_undefined)))
|
2583 |
|
|
{
|
2584 |
|
|
Elf_Internal_Rela outrel;
|
2585 |
|
|
bfd_boolean skip, relocate;
|
2586 |
|
|
asection *sreloc;
|
2587 |
|
|
bfd_byte *loc;
|
2588 |
|
|
|
2589 |
|
|
/* When generating a shared object, these relocations
|
2590 |
|
|
are copied into the output file to be resolved at run
|
2591 |
|
|
time. */
|
2592 |
|
|
|
2593 |
|
|
skip = FALSE;
|
2594 |
|
|
relocate = FALSE;
|
2595 |
|
|
|
2596 |
|
|
outrel.r_offset =
|
2597 |
|
|
_bfd_elf_section_offset (output_bfd, info, input_section,
|
2598 |
|
|
rel->r_offset);
|
2599 |
|
|
if (outrel.r_offset == (bfd_vma) -1)
|
2600 |
|
|
skip = TRUE;
|
2601 |
|
|
else if (outrel.r_offset == (bfd_vma) -2)
|
2602 |
|
|
skip = TRUE, relocate = TRUE;
|
2603 |
|
|
outrel.r_offset += (input_section->output_section->vma
|
2604 |
|
|
+ input_section->output_offset);
|
2605 |
|
|
|
2606 |
|
|
if (skip)
|
2607 |
|
|
memset (&outrel, 0, sizeof outrel);
|
2608 |
|
|
else if (h != NULL
|
2609 |
|
|
&& h->dynindx != -1
|
2610 |
|
|
&& (r_type == R_390_PC16
|
2611 |
|
|
|| r_type == R_390_PC16DBL
|
2612 |
|
|
|| r_type == R_390_PC32DBL
|
2613 |
|
|
|| r_type == R_390_PC32
|
2614 |
|
|
|| !info->shared
|
2615 |
|
|
|| !info->symbolic
|
2616 |
|
|
|| !h->def_regular))
|
2617 |
|
|
{
|
2618 |
|
|
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
|
2619 |
|
|
outrel.r_addend = rel->r_addend;
|
2620 |
|
|
}
|
2621 |
|
|
else
|
2622 |
|
|
{
|
2623 |
|
|
/* This symbol is local, or marked to become local. */
|
2624 |
|
|
outrel.r_addend = relocation + rel->r_addend;
|
2625 |
|
|
if (r_type == R_390_32)
|
2626 |
|
|
{
|
2627 |
|
|
relocate = TRUE;
|
2628 |
|
|
outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
|
2629 |
|
|
}
|
2630 |
|
|
else
|
2631 |
|
|
{
|
2632 |
|
|
long sindx;
|
2633 |
|
|
|
2634 |
|
|
if (bfd_is_abs_section (sec))
|
2635 |
|
|
sindx = 0;
|
2636 |
|
|
else if (sec == NULL || sec->owner == NULL)
|
2637 |
|
|
{
|
2638 |
|
|
bfd_set_error(bfd_error_bad_value);
|
2639 |
|
|
return FALSE;
|
2640 |
|
|
}
|
2641 |
|
|
else
|
2642 |
|
|
{
|
2643 |
|
|
asection *osec;
|
2644 |
|
|
|
2645 |
|
|
osec = sec->output_section;
|
2646 |
|
|
sindx = elf_section_data (osec)->dynindx;
|
2647 |
|
|
if (sindx == 0)
|
2648 |
|
|
{
|
2649 |
|
|
osec = htab->elf.text_index_section;
|
2650 |
|
|
sindx = elf_section_data (osec)->dynindx;
|
2651 |
|
|
}
|
2652 |
|
|
BFD_ASSERT (sindx != 0);
|
2653 |
|
|
|
2654 |
|
|
/* We are turning this relocation into one
|
2655 |
|
|
against a section symbol, so subtract out
|
2656 |
|
|
the output section's address but not the
|
2657 |
|
|
offset of the input section in the output
|
2658 |
|
|
section. */
|
2659 |
|
|
outrel.r_addend -= osec->vma;
|
2660 |
|
|
}
|
2661 |
|
|
outrel.r_info = ELF32_R_INFO (sindx, r_type);
|
2662 |
|
|
}
|
2663 |
|
|
}
|
2664 |
|
|
|
2665 |
|
|
sreloc = elf_section_data (input_section)->sreloc;
|
2666 |
|
|
if (sreloc == NULL)
|
2667 |
|
|
abort ();
|
2668 |
|
|
|
2669 |
|
|
loc = sreloc->contents;
|
2670 |
|
|
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
|
2671 |
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
2672 |
|
|
|
2673 |
|
|
/* If this reloc is against an external symbol, we do
|
2674 |
|
|
not want to fiddle with the addend. Otherwise, we
|
2675 |
|
|
need to include the symbol value so that it becomes
|
2676 |
|
|
an addend for the dynamic reloc. */
|
2677 |
|
|
if (! relocate)
|
2678 |
|
|
continue;
|
2679 |
|
|
}
|
2680 |
|
|
break;
|
2681 |
|
|
|
2682 |
|
|
/* Relocations for tls literal pool entries. */
|
2683 |
|
|
case R_390_TLS_IE32:
|
2684 |
|
|
if (info->shared)
|
2685 |
|
|
{
|
2686 |
|
|
Elf_Internal_Rela outrel;
|
2687 |
|
|
asection *sreloc;
|
2688 |
|
|
bfd_byte *loc;
|
2689 |
|
|
|
2690 |
|
|
outrel.r_offset = rel->r_offset
|
2691 |
|
|
+ input_section->output_section->vma
|
2692 |
|
|
+ input_section->output_offset;
|
2693 |
|
|
outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
|
2694 |
|
|
sreloc = elf_section_data (input_section)->sreloc;
|
2695 |
|
|
if (sreloc == NULL)
|
2696 |
|
|
abort ();
|
2697 |
|
|
loc = sreloc->contents;
|
2698 |
|
|
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
|
2699 |
|
|
bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
|
2700 |
|
|
}
|
2701 |
|
|
/* Fall through. */
|
2702 |
|
|
|
2703 |
|
|
case R_390_TLS_GD32:
|
2704 |
|
|
case R_390_TLS_GOTIE32:
|
2705 |
|
|
r_type = elf_s390_tls_transition (info, r_type, h == NULL);
|
2706 |
|
|
tls_type = GOT_UNKNOWN;
|
2707 |
|
|
if (h == NULL && local_got_offsets)
|
2708 |
|
|
tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
|
2709 |
|
|
else if (h != NULL)
|
2710 |
|
|
{
|
2711 |
|
|
tls_type = elf_s390_hash_entry(h)->tls_type;
|
2712 |
|
|
if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
|
2713 |
|
|
r_type = R_390_TLS_LE32;
|
2714 |
|
|
}
|
2715 |
|
|
if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
|
2716 |
|
|
r_type = R_390_TLS_IE32;
|
2717 |
|
|
|
2718 |
|
|
if (r_type == R_390_TLS_LE32)
|
2719 |
|
|
{
|
2720 |
|
|
/* This relocation gets optimized away by the local exec
|
2721 |
|
|
access optimization. */
|
2722 |
|
|
BFD_ASSERT (! unresolved_reloc);
|
2723 |
|
|
bfd_put_32 (output_bfd, -tpoff (info, relocation),
|
2724 |
|
|
contents + rel->r_offset);
|
2725 |
|
|
continue;
|
2726 |
|
|
}
|
2727 |
|
|
|
2728 |
|
|
if (htab->sgot == NULL)
|
2729 |
|
|
abort ();
|
2730 |
|
|
|
2731 |
|
|
if (h != NULL)
|
2732 |
|
|
off = h->got.offset;
|
2733 |
|
|
else
|
2734 |
|
|
{
|
2735 |
|
|
if (local_got_offsets == NULL)
|
2736 |
|
|
abort ();
|
2737 |
|
|
|
2738 |
|
|
off = local_got_offsets[r_symndx];
|
2739 |
|
|
}
|
2740 |
|
|
|
2741 |
|
|
emit_tls_relocs:
|
2742 |
|
|
|
2743 |
|
|
if ((off & 1) != 0)
|
2744 |
|
|
off &= ~1;
|
2745 |
|
|
else
|
2746 |
|
|
{
|
2747 |
|
|
Elf_Internal_Rela outrel;
|
2748 |
|
|
bfd_byte *loc;
|
2749 |
|
|
int dr_type, indx;
|
2750 |
|
|
|
2751 |
|
|
if (htab->srelgot == NULL)
|
2752 |
|
|
abort ();
|
2753 |
|
|
|
2754 |
|
|
outrel.r_offset = (htab->sgot->output_section->vma
|
2755 |
|
|
+ htab->sgot->output_offset + off);
|
2756 |
|
|
|
2757 |
|
|
indx = h && h->dynindx != -1 ? h->dynindx : 0;
|
2758 |
|
|
if (r_type == R_390_TLS_GD32)
|
2759 |
|
|
dr_type = R_390_TLS_DTPMOD;
|
2760 |
|
|
else
|
2761 |
|
|
dr_type = R_390_TLS_TPOFF;
|
2762 |
|
|
if (dr_type == R_390_TLS_TPOFF && indx == 0)
|
2763 |
|
|
outrel.r_addend = relocation - dtpoff_base (info);
|
2764 |
|
|
else
|
2765 |
|
|
outrel.r_addend = 0;
|
2766 |
|
|
outrel.r_info = ELF32_R_INFO (indx, dr_type);
|
2767 |
|
|
loc = htab->srelgot->contents;
|
2768 |
|
|
loc += htab->srelgot->reloc_count++
|
2769 |
|
|
* sizeof (Elf32_External_Rela);
|
2770 |
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
2771 |
|
|
|
2772 |
|
|
if (r_type == R_390_TLS_GD32)
|
2773 |
|
|
{
|
2774 |
|
|
if (indx == 0)
|
2775 |
|
|
{
|
2776 |
|
|
BFD_ASSERT (! unresolved_reloc);
|
2777 |
|
|
bfd_put_32 (output_bfd,
|
2778 |
|
|
relocation - dtpoff_base (info),
|
2779 |
|
|
htab->sgot->contents + off + GOT_ENTRY_SIZE);
|
2780 |
|
|
}
|
2781 |
|
|
else
|
2782 |
|
|
{
|
2783 |
|
|
outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
|
2784 |
|
|
outrel.r_offset += GOT_ENTRY_SIZE;
|
2785 |
|
|
outrel.r_addend = 0;
|
2786 |
|
|
htab->srelgot->reloc_count++;
|
2787 |
|
|
loc += sizeof (Elf32_External_Rela);
|
2788 |
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
2789 |
|
|
}
|
2790 |
|
|
}
|
2791 |
|
|
|
2792 |
|
|
if (h != NULL)
|
2793 |
|
|
h->got.offset |= 1;
|
2794 |
|
|
else
|
2795 |
|
|
local_got_offsets[r_symndx] |= 1;
|
2796 |
|
|
}
|
2797 |
|
|
|
2798 |
|
|
if (off >= (bfd_vma) -2)
|
2799 |
|
|
abort ();
|
2800 |
|
|
if (r_type == ELF32_R_TYPE (rel->r_info))
|
2801 |
|
|
{
|
2802 |
|
|
relocation = htab->sgot->output_offset + off;
|
2803 |
|
|
if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
|
2804 |
|
|
relocation += htab->sgot->output_section->vma;
|
2805 |
|
|
unresolved_reloc = FALSE;
|
2806 |
|
|
}
|
2807 |
|
|
else
|
2808 |
|
|
{
|
2809 |
|
|
bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
|
2810 |
|
|
contents + rel->r_offset);
|
2811 |
|
|
continue;
|
2812 |
|
|
}
|
2813 |
|
|
break;
|
2814 |
|
|
|
2815 |
|
|
case R_390_TLS_GOTIE12:
|
2816 |
|
|
case R_390_TLS_GOTIE20:
|
2817 |
|
|
case R_390_TLS_IEENT:
|
2818 |
|
|
if (h == NULL)
|
2819 |
|
|
{
|
2820 |
|
|
if (local_got_offsets == NULL)
|
2821 |
|
|
abort();
|
2822 |
|
|
off = local_got_offsets[r_symndx];
|
2823 |
|
|
if (info->shared)
|
2824 |
|
|
goto emit_tls_relocs;
|
2825 |
|
|
}
|
2826 |
|
|
else
|
2827 |
|
|
{
|
2828 |
|
|
off = h->got.offset;
|
2829 |
|
|
tls_type = elf_s390_hash_entry(h)->tls_type;
|
2830 |
|
|
if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
|
2831 |
|
|
goto emit_tls_relocs;
|
2832 |
|
|
}
|
2833 |
|
|
|
2834 |
|
|
if (htab->sgot == NULL)
|
2835 |
|
|
abort ();
|
2836 |
|
|
|
2837 |
|
|
BFD_ASSERT (! unresolved_reloc);
|
2838 |
|
|
bfd_put_32 (output_bfd, -tpoff (info, relocation),
|
2839 |
|
|
htab->sgot->contents + off);
|
2840 |
|
|
relocation = htab->sgot->output_offset + off;
|
2841 |
|
|
if (r_type == R_390_TLS_IEENT)
|
2842 |
|
|
relocation += htab->sgot->output_section->vma;
|
2843 |
|
|
unresolved_reloc = FALSE;
|
2844 |
|
|
break;
|
2845 |
|
|
|
2846 |
|
|
case R_390_TLS_LDM32:
|
2847 |
|
|
if (! info->shared)
|
2848 |
|
|
/* The literal pool entry this relocation refers to gets ignored
|
2849 |
|
|
by the optimized code of the local exec model. Do nothing
|
2850 |
|
|
and the value will turn out zero. */
|
2851 |
|
|
continue;
|
2852 |
|
|
|
2853 |
|
|
if (htab->sgot == NULL)
|
2854 |
|
|
abort ();
|
2855 |
|
|
|
2856 |
|
|
off = htab->tls_ldm_got.offset;
|
2857 |
|
|
if (off & 1)
|
2858 |
|
|
off &= ~1;
|
2859 |
|
|
else
|
2860 |
|
|
{
|
2861 |
|
|
Elf_Internal_Rela outrel;
|
2862 |
|
|
bfd_byte *loc;
|
2863 |
|
|
|
2864 |
|
|
if (htab->srelgot == NULL)
|
2865 |
|
|
abort ();
|
2866 |
|
|
|
2867 |
|
|
outrel.r_offset = (htab->sgot->output_section->vma
|
2868 |
|
|
+ htab->sgot->output_offset + off);
|
2869 |
|
|
|
2870 |
|
|
bfd_put_32 (output_bfd, 0,
|
2871 |
|
|
htab->sgot->contents + off + GOT_ENTRY_SIZE);
|
2872 |
|
|
outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
|
2873 |
|
|
outrel.r_addend = 0;
|
2874 |
|
|
loc = htab->srelgot->contents;
|
2875 |
|
|
loc += htab->srelgot->reloc_count++
|
2876 |
|
|
* sizeof (Elf32_External_Rela);
|
2877 |
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
2878 |
|
|
htab->tls_ldm_got.offset |= 1;
|
2879 |
|
|
}
|
2880 |
|
|
relocation = htab->sgot->output_offset + off;
|
2881 |
|
|
unresolved_reloc = FALSE;
|
2882 |
|
|
break;
|
2883 |
|
|
|
2884 |
|
|
case R_390_TLS_LE32:
|
2885 |
|
|
if (info->shared)
|
2886 |
|
|
{
|
2887 |
|
|
/* Linking a shared library with non-fpic code requires
|
2888 |
|
|
a R_390_TLS_TPOFF relocation. */
|
2889 |
|
|
Elf_Internal_Rela outrel;
|
2890 |
|
|
asection *sreloc;
|
2891 |
|
|
bfd_byte *loc;
|
2892 |
|
|
int indx;
|
2893 |
|
|
|
2894 |
|
|
outrel.r_offset = rel->r_offset
|
2895 |
|
|
+ input_section->output_section->vma
|
2896 |
|
|
+ input_section->output_offset;
|
2897 |
|
|
if (h != NULL && h->dynindx != -1)
|
2898 |
|
|
indx = h->dynindx;
|
2899 |
|
|
else
|
2900 |
|
|
indx = 0;
|
2901 |
|
|
outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
|
2902 |
|
|
if (indx == 0)
|
2903 |
|
|
outrel.r_addend = relocation - dtpoff_base (info);
|
2904 |
|
|
else
|
2905 |
|
|
outrel.r_addend = 0;
|
2906 |
|
|
sreloc = elf_section_data (input_section)->sreloc;
|
2907 |
|
|
if (sreloc == NULL)
|
2908 |
|
|
abort ();
|
2909 |
|
|
loc = sreloc->contents;
|
2910 |
|
|
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
|
2911 |
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
2912 |
|
|
}
|
2913 |
|
|
else
|
2914 |
|
|
{
|
2915 |
|
|
BFD_ASSERT (! unresolved_reloc);
|
2916 |
|
|
bfd_put_32 (output_bfd, -tpoff (info, relocation),
|
2917 |
|
|
contents + rel->r_offset);
|
2918 |
|
|
}
|
2919 |
|
|
continue;
|
2920 |
|
|
|
2921 |
|
|
case R_390_TLS_LDO32:
|
2922 |
|
|
if (info->shared)
|
2923 |
|
|
relocation -= dtpoff_base (info);
|
2924 |
|
|
else
|
2925 |
|
|
/* When converting LDO to LE, we must negate. */
|
2926 |
|
|
relocation = -tpoff (info, relocation);
|
2927 |
|
|
break;
|
2928 |
|
|
|
2929 |
|
|
/* Relocations for tls instructions. */
|
2930 |
|
|
case R_390_TLS_LOAD:
|
2931 |
|
|
case R_390_TLS_GDCALL:
|
2932 |
|
|
case R_390_TLS_LDCALL:
|
2933 |
|
|
tls_type = GOT_UNKNOWN;
|
2934 |
|
|
if (h == NULL && local_got_offsets)
|
2935 |
|
|
tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
|
2936 |
|
|
else if (h != NULL)
|
2937 |
|
|
tls_type = elf_s390_hash_entry(h)->tls_type;
|
2938 |
|
|
|
2939 |
|
|
if (tls_type == GOT_TLS_GD)
|
2940 |
|
|
continue;
|
2941 |
|
|
|
2942 |
|
|
if (r_type == R_390_TLS_LOAD)
|
2943 |
|
|
{
|
2944 |
|
|
if (!info->shared && (h == NULL || h->dynindx == -1))
|
2945 |
|
|
{
|
2946 |
|
|
/* IE->LE transition. Four valid cases:
|
2947 |
|
|
l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
|
2948 |
|
|
l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
|
2949 |
|
|
l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
|
2950 |
|
|
l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
|
2951 |
|
|
unsigned int insn, ry;
|
2952 |
|
|
|
2953 |
|
|
insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
2954 |
|
|
ry = 0;
|
2955 |
|
|
if ((insn & 0xff00f000) == 0x58000000)
|
2956 |
|
|
/* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
|
2957 |
|
|
ry = (insn & 0x000f0000);
|
2958 |
|
|
else if ((insn & 0xff0f0000) == 0x58000000)
|
2959 |
|
|
/* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
|
2960 |
|
|
ry = (insn & 0x0000f000) << 4;
|
2961 |
|
|
else if ((insn & 0xff00f000) == 0x5800c000)
|
2962 |
|
|
/* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
|
2963 |
|
|
ry = (insn & 0x000f0000);
|
2964 |
|
|
else if ((insn & 0xff0f0000) == 0x580c0000)
|
2965 |
|
|
/* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
|
2966 |
|
|
ry = (insn & 0x0000f000) << 4;
|
2967 |
|
|
else
|
2968 |
|
|
invalid_tls_insn (input_bfd, input_section, rel);
|
2969 |
|
|
insn = 0x18000700 | (insn & 0x00f00000) | ry;
|
2970 |
|
|
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
|
2971 |
|
|
}
|
2972 |
|
|
}
|
2973 |
|
|
else if (r_type == R_390_TLS_GDCALL)
|
2974 |
|
|
{
|
2975 |
|
|
unsigned int insn;
|
2976 |
|
|
|
2977 |
|
|
insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
2978 |
|
|
if ((insn & 0xff000fff) != 0x4d000000 &&
|
2979 |
|
|
(insn & 0xffff0000) != 0xc0e50000)
|
2980 |
|
|
invalid_tls_insn (input_bfd, input_section, rel);
|
2981 |
|
|
if (!info->shared && (h == NULL || h->dynindx == -1))
|
2982 |
|
|
{
|
2983 |
|
|
if ((insn & 0xff000000) == 0x4d000000)
|
2984 |
|
|
{
|
2985 |
|
|
/* GD->LE transition.
|
2986 |
|
|
bas %r14,0(%rx,%r13) -> bc 0,0 */
|
2987 |
|
|
insn = 0x47000000;
|
2988 |
|
|
}
|
2989 |
|
|
else
|
2990 |
|
|
{
|
2991 |
|
|
/* GD->LE transition.
|
2992 |
|
|
brasl %r14,_tls_get_addr@plt -> brcl 0,. */
|
2993 |
|
|
insn = 0xc0040000;
|
2994 |
|
|
bfd_put_16 (output_bfd, 0x0000,
|
2995 |
|
|
contents + rel->r_offset + 4);
|
2996 |
|
|
}
|
2997 |
|
|
}
|
2998 |
|
|
else
|
2999 |
|
|
{
|
3000 |
|
|
if ((insn & 0xff000000) == 0x4d000000)
|
3001 |
|
|
{
|
3002 |
|
|
/* GD->IE transition.
|
3003 |
|
|
bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
|
3004 |
|
|
insn = 0x5822c000;
|
3005 |
|
|
}
|
3006 |
|
|
else
|
3007 |
|
|
{
|
3008 |
|
|
/* GD->IE transition.
|
3009 |
|
|
brasl %r14,__tls_get_addr@plt ->
|
3010 |
|
|
l %r2,0(%r2,%r12) ; bcr 0,0 */
|
3011 |
|
|
insn = 0x5822c000;
|
3012 |
|
|
bfd_put_16 (output_bfd, 0x0700,
|
3013 |
|
|
contents + rel->r_offset + 4);
|
3014 |
|
|
}
|
3015 |
|
|
}
|
3016 |
|
|
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
|
3017 |
|
|
}
|
3018 |
|
|
else if (r_type == R_390_TLS_LDCALL)
|
3019 |
|
|
{
|
3020 |
|
|
if (!info->shared)
|
3021 |
|
|
{
|
3022 |
|
|
unsigned int insn;
|
3023 |
|
|
|
3024 |
|
|
insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
3025 |
|
|
if ((insn & 0xff000fff) != 0x4d000000 &&
|
3026 |
|
|
(insn & 0xffff0000) != 0xc0e50000)
|
3027 |
|
|
invalid_tls_insn (input_bfd, input_section, rel);
|
3028 |
|
|
if ((insn & 0xff000000) == 0x4d000000)
|
3029 |
|
|
{
|
3030 |
|
|
/* LD->LE transition.
|
3031 |
|
|
bas %r14,0(%rx,%r13) -> bc 0,0 */
|
3032 |
|
|
insn = 0x47000000;
|
3033 |
|
|
}
|
3034 |
|
|
else
|
3035 |
|
|
{
|
3036 |
|
|
/* LD->LE transition.
|
3037 |
|
|
brasl %r14,__tls_get_addr@plt -> brcl 0,. */
|
3038 |
|
|
insn = 0xc0040000;
|
3039 |
|
|
bfd_put_16 (output_bfd, 0x0000,
|
3040 |
|
|
contents + rel->r_offset + 4);
|
3041 |
|
|
}
|
3042 |
|
|
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
|
3043 |
|
|
}
|
3044 |
|
|
}
|
3045 |
|
|
continue;
|
3046 |
|
|
|
3047 |
|
|
default:
|
3048 |
|
|
break;
|
3049 |
|
|
}
|
3050 |
|
|
|
3051 |
|
|
/* Dynamic relocs are not propagated for SEC_DEBUGGING sections
|
3052 |
|
|
because such sections are not SEC_ALLOC and thus ld.so will
|
3053 |
|
|
not process them. */
|
3054 |
|
|
if (unresolved_reloc
|
3055 |
|
|
&& !((input_section->flags & SEC_DEBUGGING) != 0
|
3056 |
|
|
&& h->def_dynamic))
|
3057 |
|
|
(*_bfd_error_handler)
|
3058 |
|
|
(_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
|
3059 |
|
|
input_bfd,
|
3060 |
|
|
input_section,
|
3061 |
|
|
(long) rel->r_offset,
|
3062 |
|
|
howto->name,
|
3063 |
|
|
h->root.root.string);
|
3064 |
|
|
|
3065 |
|
|
if (r_type == R_390_20
|
3066 |
|
|
|| r_type == R_390_GOT20
|
3067 |
|
|
|| r_type == R_390_GOTPLT20
|
3068 |
|
|
|| r_type == R_390_TLS_GOTIE20)
|
3069 |
|
|
{
|
3070 |
|
|
relocation += rel->r_addend;
|
3071 |
|
|
relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
|
3072 |
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
3073 |
|
|
contents, rel->r_offset,
|
3074 |
|
|
relocation, 0);
|
3075 |
|
|
}
|
3076 |
|
|
else
|
3077 |
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
3078 |
|
|
contents, rel->r_offset,
|
3079 |
|
|
relocation, rel->r_addend);
|
3080 |
|
|
|
3081 |
|
|
if (r != bfd_reloc_ok)
|
3082 |
|
|
{
|
3083 |
|
|
const char *name;
|
3084 |
|
|
|
3085 |
|
|
if (h != NULL)
|
3086 |
|
|
name = h->root.root.string;
|
3087 |
|
|
else
|
3088 |
|
|
{
|
3089 |
|
|
name = bfd_elf_string_from_elf_section (input_bfd,
|
3090 |
|
|
symtab_hdr->sh_link,
|
3091 |
|
|
sym->st_name);
|
3092 |
|
|
if (name == NULL)
|
3093 |
|
|
return FALSE;
|
3094 |
|
|
if (*name == '\0')
|
3095 |
|
|
name = bfd_section_name (input_bfd, sec);
|
3096 |
|
|
}
|
3097 |
|
|
|
3098 |
|
|
if (r == bfd_reloc_overflow)
|
3099 |
|
|
{
|
3100 |
|
|
|
3101 |
|
|
if (! ((*info->callbacks->reloc_overflow)
|
3102 |
|
|
(info, (h ? &h->root : NULL), name, howto->name,
|
3103 |
|
|
(bfd_vma) 0, input_bfd, input_section,
|
3104 |
|
|
rel->r_offset)))
|
3105 |
|
|
return FALSE;
|
3106 |
|
|
}
|
3107 |
|
|
else
|
3108 |
|
|
{
|
3109 |
|
|
(*_bfd_error_handler)
|
3110 |
|
|
(_("%B(%A+0x%lx): reloc against `%s': error %d"),
|
3111 |
|
|
input_bfd, input_section,
|
3112 |
|
|
(long) rel->r_offset, name, (int) r);
|
3113 |
|
|
return FALSE;
|
3114 |
|
|
}
|
3115 |
|
|
}
|
3116 |
|
|
}
|
3117 |
|
|
|
3118 |
|
|
return TRUE;
|
3119 |
|
|
}
|
3120 |
|
|
|
3121 |
|
|
/* Finish up dynamic symbol handling. We set the contents of various
|
3122 |
|
|
dynamic sections here. */
|
3123 |
|
|
|
3124 |
|
|
static bfd_boolean
|
3125 |
|
|
elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
|
3126 |
|
|
bfd *output_bfd;
|
3127 |
|
|
struct bfd_link_info *info;
|
3128 |
|
|
struct elf_link_hash_entry *h;
|
3129 |
|
|
Elf_Internal_Sym *sym;
|
3130 |
|
|
{
|
3131 |
|
|
struct elf_s390_link_hash_table *htab;
|
3132 |
|
|
|
3133 |
|
|
htab = elf_s390_hash_table (info);
|
3134 |
|
|
|
3135 |
|
|
if (h->plt.offset != (bfd_vma) -1)
|
3136 |
|
|
{
|
3137 |
|
|
bfd_vma plt_index;
|
3138 |
|
|
bfd_vma got_offset;
|
3139 |
|
|
Elf_Internal_Rela rela;
|
3140 |
|
|
bfd_byte *loc;
|
3141 |
|
|
bfd_vma relative_offset;
|
3142 |
|
|
|
3143 |
|
|
/* This symbol has an entry in the procedure linkage table. Set
|
3144 |
|
|
it up. */
|
3145 |
|
|
if (h->dynindx == -1
|
3146 |
|
|
|| htab->splt == NULL
|
3147 |
|
|
|| htab->sgotplt == NULL
|
3148 |
|
|
|| htab->srelplt == NULL)
|
3149 |
|
|
abort ();
|
3150 |
|
|
|
3151 |
|
|
/* Calc. index no.
|
3152 |
|
|
Current offset - size first entry / entry size. */
|
3153 |
|
|
plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
|
3154 |
|
|
|
3155 |
|
|
/* Offset in GOT is PLT index plus GOT headers(3) times 4,
|
3156 |
|
|
addr & GOT addr. */
|
3157 |
|
|
got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
|
3158 |
|
|
|
3159 |
|
|
/* S390 uses halfwords for relative branch calc! */
|
3160 |
|
|
relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
|
3161 |
|
|
(PLT_ENTRY_SIZE * plt_index) + 18) / 2);
|
3162 |
|
|
/* If offset is > 32768, branch to a previous branch
|
3163 |
|
|
390 can only handle +-64 K jumps. */
|
3164 |
|
|
if ( -32768 > (int) relative_offset )
|
3165 |
|
|
relative_offset
|
3166 |
|
|
= -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
|
3167 |
|
|
|
3168 |
|
|
/* Fill in the entry in the procedure linkage table. */
|
3169 |
|
|
if (!info->shared)
|
3170 |
|
|
{
|
3171 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
|
3172 |
|
|
htab->splt->contents + h->plt.offset);
|
3173 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
|
3174 |
|
|
htab->splt->contents + h->plt.offset + 4);
|
3175 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
|
3176 |
|
|
htab->splt->contents + h->plt.offset + 8);
|
3177 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
|
3178 |
|
|
htab->splt->contents + h->plt.offset + 12);
|
3179 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
|
3180 |
|
|
htab->splt->contents + h->plt.offset + 16);
|
3181 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
|
3182 |
|
|
htab->splt->contents + h->plt.offset + 20);
|
3183 |
|
|
bfd_put_32 (output_bfd,
|
3184 |
|
|
(htab->sgotplt->output_section->vma
|
3185 |
|
|
+ htab->sgotplt->output_offset
|
3186 |
|
|
+ got_offset),
|
3187 |
|
|
htab->splt->contents + h->plt.offset + 24);
|
3188 |
|
|
}
|
3189 |
|
|
else if (got_offset < 4096)
|
3190 |
|
|
{
|
3191 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
|
3192 |
|
|
htab->splt->contents + h->plt.offset);
|
3193 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
|
3194 |
|
|
htab->splt->contents + h->plt.offset + 4);
|
3195 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
|
3196 |
|
|
htab->splt->contents + h->plt.offset + 8);
|
3197 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
|
3198 |
|
|
htab->splt->contents + h->plt.offset + 12);
|
3199 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
|
3200 |
|
|
htab->splt->contents + h->plt.offset + 16);
|
3201 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
|
3202 |
|
|
htab->splt->contents + h->plt.offset + 20);
|
3203 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0,
|
3204 |
|
|
htab->splt->contents + h->plt.offset + 24);
|
3205 |
|
|
}
|
3206 |
|
|
else if (got_offset < 32768)
|
3207 |
|
|
{
|
3208 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
|
3209 |
|
|
htab->splt->contents + h->plt.offset);
|
3210 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
|
3211 |
|
|
htab->splt->contents + h->plt.offset + 4);
|
3212 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
|
3213 |
|
|
htab->splt->contents + h->plt.offset + 8);
|
3214 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
|
3215 |
|
|
htab->splt->contents + h->plt.offset + 12);
|
3216 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
|
3217 |
|
|
htab->splt->contents + h->plt.offset + 16);
|
3218 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
|
3219 |
|
|
htab->splt->contents + h->plt.offset + 20);
|
3220 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0,
|
3221 |
|
|
htab->splt->contents + h->plt.offset + 24);
|
3222 |
|
|
}
|
3223 |
|
|
else
|
3224 |
|
|
{
|
3225 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
|
3226 |
|
|
htab->splt->contents + h->plt.offset);
|
3227 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
|
3228 |
|
|
htab->splt->contents + h->plt.offset + 4);
|
3229 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
|
3230 |
|
|
htab->splt->contents + h->plt.offset + 8);
|
3231 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
|
3232 |
|
|
htab->splt->contents + h->plt.offset + 12);
|
3233 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
|
3234 |
|
|
htab->splt->contents + h->plt.offset + 16);
|
3235 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
|
3236 |
|
|
htab->splt->contents + h->plt.offset + 20);
|
3237 |
|
|
bfd_put_32 (output_bfd, got_offset,
|
3238 |
|
|
htab->splt->contents + h->plt.offset + 24);
|
3239 |
|
|
}
|
3240 |
|
|
/* Insert offset into reloc. table here. */
|
3241 |
|
|
bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
|
3242 |
|
|
htab->splt->contents + h->plt.offset + 28);
|
3243 |
|
|
|
3244 |
|
|
/* Fill in the entry in the global offset table.
|
3245 |
|
|
Points to instruction after GOT offset. */
|
3246 |
|
|
bfd_put_32 (output_bfd,
|
3247 |
|
|
(htab->splt->output_section->vma
|
3248 |
|
|
+ htab->splt->output_offset
|
3249 |
|
|
+ h->plt.offset
|
3250 |
|
|
+ 12),
|
3251 |
|
|
htab->sgotplt->contents + got_offset);
|
3252 |
|
|
|
3253 |
|
|
/* Fill in the entry in the .rela.plt section. */
|
3254 |
|
|
rela.r_offset = (htab->sgotplt->output_section->vma
|
3255 |
|
|
+ htab->sgotplt->output_offset
|
3256 |
|
|
+ got_offset);
|
3257 |
|
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
|
3258 |
|
|
rela.r_addend = 0;
|
3259 |
|
|
loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
|
3260 |
|
|
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
3261 |
|
|
|
3262 |
|
|
if (!h->def_regular)
|
3263 |
|
|
{
|
3264 |
|
|
/* Mark the symbol as undefined, rather than as defined in
|
3265 |
|
|
the .plt section. Leave the value alone. This is a clue
|
3266 |
|
|
for the dynamic linker, to make function pointer
|
3267 |
|
|
comparisons work between an application and shared
|
3268 |
|
|
library. */
|
3269 |
|
|
sym->st_shndx = SHN_UNDEF;
|
3270 |
|
|
}
|
3271 |
|
|
}
|
3272 |
|
|
|
3273 |
|
|
if (h->got.offset != (bfd_vma) -1
|
3274 |
|
|
&& elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
|
3275 |
|
|
&& elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
|
3276 |
|
|
&& elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
|
3277 |
|
|
{
|
3278 |
|
|
Elf_Internal_Rela rela;
|
3279 |
|
|
bfd_byte *loc;
|
3280 |
|
|
|
3281 |
|
|
/* This symbol has an entry in the global offset table. Set it
|
3282 |
|
|
up. */
|
3283 |
|
|
|
3284 |
|
|
if (htab->sgot == NULL || htab->srelgot == NULL)
|
3285 |
|
|
abort ();
|
3286 |
|
|
|
3287 |
|
|
rela.r_offset = (htab->sgot->output_section->vma
|
3288 |
|
|
+ htab->sgot->output_offset
|
3289 |
|
|
+ (h->got.offset &~ (bfd_vma) 1));
|
3290 |
|
|
|
3291 |
|
|
/* If this is a static link, or it is a -Bsymbolic link and the
|
3292 |
|
|
symbol is defined locally or was forced to be local because
|
3293 |
|
|
of a version file, we just want to emit a RELATIVE reloc.
|
3294 |
|
|
The entry in the global offset table will already have been
|
3295 |
|
|
initialized in the relocate_section function. */
|
3296 |
|
|
if (info->shared
|
3297 |
|
|
&& (info->symbolic
|
3298 |
|
|
|| h->dynindx == -1
|
3299 |
|
|
|| h->forced_local)
|
3300 |
|
|
&& h->def_regular)
|
3301 |
|
|
{
|
3302 |
|
|
BFD_ASSERT((h->got.offset & 1) != 0);
|
3303 |
|
|
rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
|
3304 |
|
|
rela.r_addend = (h->root.u.def.value
|
3305 |
|
|
+ h->root.u.def.section->output_section->vma
|
3306 |
|
|
+ h->root.u.def.section->output_offset);
|
3307 |
|
|
}
|
3308 |
|
|
else
|
3309 |
|
|
{
|
3310 |
|
|
BFD_ASSERT((h->got.offset & 1) == 0);
|
3311 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
|
3312 |
|
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
|
3313 |
|
|
rela.r_addend = 0;
|
3314 |
|
|
}
|
3315 |
|
|
|
3316 |
|
|
loc = htab->srelgot->contents;
|
3317 |
|
|
loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
|
3318 |
|
|
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
3319 |
|
|
}
|
3320 |
|
|
|
3321 |
|
|
if (h->needs_copy)
|
3322 |
|
|
{
|
3323 |
|
|
Elf_Internal_Rela rela;
|
3324 |
|
|
bfd_byte *loc;
|
3325 |
|
|
|
3326 |
|
|
/* This symbols needs a copy reloc. Set it up. */
|
3327 |
|
|
|
3328 |
|
|
if (h->dynindx == -1
|
3329 |
|
|
|| (h->root.type != bfd_link_hash_defined
|
3330 |
|
|
&& h->root.type != bfd_link_hash_defweak)
|
3331 |
|
|
|| htab->srelbss == NULL)
|
3332 |
|
|
abort ();
|
3333 |
|
|
|
3334 |
|
|
rela.r_offset = (h->root.u.def.value
|
3335 |
|
|
+ h->root.u.def.section->output_section->vma
|
3336 |
|
|
+ h->root.u.def.section->output_offset);
|
3337 |
|
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
|
3338 |
|
|
rela.r_addend = 0;
|
3339 |
|
|
loc = htab->srelbss->contents;
|
3340 |
|
|
loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
|
3341 |
|
|
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
3342 |
|
|
}
|
3343 |
|
|
|
3344 |
|
|
/* Mark some specially defined symbols as absolute. */
|
3345 |
|
|
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|
3346 |
|
|
|| h == htab->elf.hgot
|
3347 |
|
|
|| h == htab->elf.hplt)
|
3348 |
|
|
sym->st_shndx = SHN_ABS;
|
3349 |
|
|
|
3350 |
|
|
return TRUE;
|
3351 |
|
|
}
|
3352 |
|
|
|
3353 |
|
|
/* Used to decide how to sort relocs in an optimal manner for the
|
3354 |
|
|
dynamic linker, before writing them out. */
|
3355 |
|
|
|
3356 |
|
|
static enum elf_reloc_type_class
|
3357 |
|
|
elf_s390_reloc_type_class (rela)
|
3358 |
|
|
const Elf_Internal_Rela *rela;
|
3359 |
|
|
{
|
3360 |
|
|
switch ((int) ELF32_R_TYPE (rela->r_info))
|
3361 |
|
|
{
|
3362 |
|
|
case R_390_RELATIVE:
|
3363 |
|
|
return reloc_class_relative;
|
3364 |
|
|
case R_390_JMP_SLOT:
|
3365 |
|
|
return reloc_class_plt;
|
3366 |
|
|
case R_390_COPY:
|
3367 |
|
|
return reloc_class_copy;
|
3368 |
|
|
default:
|
3369 |
|
|
return reloc_class_normal;
|
3370 |
|
|
}
|
3371 |
|
|
}
|
3372 |
|
|
|
3373 |
|
|
/* Finish up the dynamic sections. */
|
3374 |
|
|
|
3375 |
|
|
static bfd_boolean
|
3376 |
|
|
elf_s390_finish_dynamic_sections (output_bfd, info)
|
3377 |
|
|
bfd *output_bfd;
|
3378 |
|
|
struct bfd_link_info *info;
|
3379 |
|
|
{
|
3380 |
|
|
struct elf_s390_link_hash_table *htab;
|
3381 |
|
|
bfd *dynobj;
|
3382 |
|
|
asection *sdyn;
|
3383 |
|
|
|
3384 |
|
|
htab = elf_s390_hash_table (info);
|
3385 |
|
|
dynobj = htab->elf.dynobj;
|
3386 |
|
|
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
3387 |
|
|
|
3388 |
|
|
if (htab->elf.dynamic_sections_created)
|
3389 |
|
|
{
|
3390 |
|
|
Elf32_External_Dyn *dyncon, *dynconend;
|
3391 |
|
|
|
3392 |
|
|
if (sdyn == NULL || htab->sgot == NULL)
|
3393 |
|
|
abort ();
|
3394 |
|
|
|
3395 |
|
|
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
3396 |
|
|
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
|
3397 |
|
|
for (; dyncon < dynconend; dyncon++)
|
3398 |
|
|
{
|
3399 |
|
|
Elf_Internal_Dyn dyn;
|
3400 |
|
|
asection *s;
|
3401 |
|
|
|
3402 |
|
|
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
3403 |
|
|
|
3404 |
|
|
switch (dyn.d_tag)
|
3405 |
|
|
{
|
3406 |
|
|
default:
|
3407 |
|
|
continue;
|
3408 |
|
|
|
3409 |
|
|
case DT_PLTGOT:
|
3410 |
|
|
dyn.d_un.d_ptr = htab->sgot->output_section->vma;
|
3411 |
|
|
break;
|
3412 |
|
|
|
3413 |
|
|
case DT_JMPREL:
|
3414 |
|
|
dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
|
3415 |
|
|
break;
|
3416 |
|
|
|
3417 |
|
|
case DT_PLTRELSZ:
|
3418 |
|
|
s = htab->srelplt->output_section;
|
3419 |
|
|
dyn.d_un.d_val = s->size;
|
3420 |
|
|
break;
|
3421 |
|
|
}
|
3422 |
|
|
|
3423 |
|
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
3424 |
|
|
}
|
3425 |
|
|
|
3426 |
|
|
/* Fill in the special first entry in the procedure linkage table. */
|
3427 |
|
|
if (htab->splt && htab->splt->size > 0)
|
3428 |
|
|
{
|
3429 |
|
|
memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
|
3430 |
|
|
if (info->shared)
|
3431 |
|
|
{
|
3432 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
|
3433 |
|
|
htab->splt->contents );
|
3434 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
|
3435 |
|
|
htab->splt->contents +4 );
|
3436 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
|
3437 |
|
|
htab->splt->contents +8 );
|
3438 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
|
3439 |
|
|
htab->splt->contents +12 );
|
3440 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
|
3441 |
|
|
htab->splt->contents +16 );
|
3442 |
|
|
}
|
3443 |
|
|
else
|
3444 |
|
|
{
|
3445 |
|
|
bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
|
3446 |
|
|
htab->splt->contents );
|
3447 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
|
3448 |
|
|
htab->splt->contents +4 );
|
3449 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
|
3450 |
|
|
htab->splt->contents +8 );
|
3451 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
|
3452 |
|
|
htab->splt->contents +12 );
|
3453 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
|
3454 |
|
|
htab->splt->contents +16 );
|
3455 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
|
3456 |
|
|
htab->splt->contents +20 );
|
3457 |
|
|
bfd_put_32 (output_bfd,
|
3458 |
|
|
htab->sgotplt->output_section->vma
|
3459 |
|
|
+ htab->sgotplt->output_offset,
|
3460 |
|
|
htab->splt->contents + 24);
|
3461 |
|
|
}
|
3462 |
|
|
elf_section_data (htab->splt->output_section)
|
3463 |
|
|
->this_hdr.sh_entsize = 4;
|
3464 |
|
|
}
|
3465 |
|
|
|
3466 |
|
|
}
|
3467 |
|
|
|
3468 |
|
|
if (htab->sgotplt)
|
3469 |
|
|
{
|
3470 |
|
|
/* Fill in the first three entries in the global offset table. */
|
3471 |
|
|
if (htab->sgotplt->size > 0)
|
3472 |
|
|
{
|
3473 |
|
|
bfd_put_32 (output_bfd,
|
3474 |
|
|
(sdyn == NULL ? (bfd_vma) 0
|
3475 |
|
|
: sdyn->output_section->vma + sdyn->output_offset),
|
3476 |
|
|
htab->sgotplt->contents);
|
3477 |
|
|
/* One entry for shared object struct ptr. */
|
3478 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
|
3479 |
|
|
/* One entry for _dl_runtime_resolve. */
|
3480 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
|
3481 |
|
|
}
|
3482 |
|
|
|
3483 |
|
|
elf_section_data (htab->sgotplt->output_section)
|
3484 |
|
|
->this_hdr.sh_entsize = 4;
|
3485 |
|
|
}
|
3486 |
|
|
return TRUE;
|
3487 |
|
|
}
|
3488 |
|
|
|
3489 |
|
|
static bfd_boolean
|
3490 |
|
|
elf_s390_grok_prstatus (abfd, note)
|
3491 |
|
|
bfd * abfd;
|
3492 |
|
|
Elf_Internal_Note * note;
|
3493 |
|
|
{
|
3494 |
|
|
int offset;
|
3495 |
|
|
unsigned int size;
|
3496 |
|
|
|
3497 |
|
|
switch (note->descsz)
|
3498 |
|
|
{
|
3499 |
|
|
default:
|
3500 |
|
|
return FALSE;
|
3501 |
|
|
|
3502 |
|
|
case 224: /* S/390 Linux. */
|
3503 |
|
|
/* pr_cursig */
|
3504 |
|
|
elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
|
3505 |
|
|
|
3506 |
|
|
/* pr_pid */
|
3507 |
|
|
elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
|
3508 |
|
|
|
3509 |
|
|
/* pr_reg */
|
3510 |
|
|
offset = 72;
|
3511 |
|
|
size = 144;
|
3512 |
|
|
break;
|
3513 |
|
|
}
|
3514 |
|
|
|
3515 |
|
|
/* Make a ".reg/999" section. */
|
3516 |
|
|
return _bfd_elfcore_make_pseudosection (abfd, ".reg",
|
3517 |
|
|
size, note->descpos + offset);
|
3518 |
|
|
}
|
3519 |
|
|
|
3520 |
|
|
/* Return address for Ith PLT stub in section PLT, for relocation REL
|
3521 |
|
|
or (bfd_vma) -1 if it should not be included. */
|
3522 |
|
|
|
3523 |
|
|
static bfd_vma
|
3524 |
|
|
elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
|
3525 |
|
|
const arelent *rel ATTRIBUTE_UNUSED)
|
3526 |
|
|
{
|
3527 |
|
|
return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
|
3528 |
|
|
}
|
3529 |
|
|
|
3530 |
|
|
|
3531 |
|
|
#define TARGET_BIG_SYM bfd_elf32_s390_vec
|
3532 |
|
|
#define TARGET_BIG_NAME "elf32-s390"
|
3533 |
|
|
#define ELF_ARCH bfd_arch_s390
|
3534 |
|
|
#define ELF_MACHINE_CODE EM_S390
|
3535 |
|
|
#define ELF_MACHINE_ALT1 EM_S390_OLD
|
3536 |
|
|
#define ELF_MAXPAGESIZE 0x1000
|
3537 |
|
|
|
3538 |
|
|
#define elf_backend_can_gc_sections 1
|
3539 |
|
|
#define elf_backend_can_refcount 1
|
3540 |
|
|
#define elf_backend_want_got_plt 1
|
3541 |
|
|
#define elf_backend_plt_readonly 1
|
3542 |
|
|
#define elf_backend_want_plt_sym 0
|
3543 |
|
|
#define elf_backend_got_header_size 12
|
3544 |
|
|
#define elf_backend_rela_normal 1
|
3545 |
|
|
|
3546 |
|
|
#define elf_info_to_howto elf_s390_info_to_howto
|
3547 |
|
|
|
3548 |
|
|
#define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
|
3549 |
|
|
#define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
|
3550 |
|
|
#define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
|
3551 |
|
|
#define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
|
3552 |
|
|
|
3553 |
|
|
#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
|
3554 |
|
|
#define elf_backend_check_relocs elf_s390_check_relocs
|
3555 |
|
|
#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
|
3556 |
|
|
#define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
|
3557 |
|
|
#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
|
3558 |
|
|
#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
|
3559 |
|
|
#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
|
3560 |
|
|
#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
|
3561 |
|
|
#define elf_backend_reloc_type_class elf_s390_reloc_type_class
|
3562 |
|
|
#define elf_backend_relocate_section elf_s390_relocate_section
|
3563 |
|
|
#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
|
3564 |
|
|
#define elf_backend_init_index_section _bfd_elf_init_1_index_section
|
3565 |
|
|
#define elf_backend_reloc_type_class elf_s390_reloc_type_class
|
3566 |
|
|
#define elf_backend_grok_prstatus elf_s390_grok_prstatus
|
3567 |
|
|
#define elf_backend_plt_sym_val elf_s390_plt_sym_val
|
3568 |
|
|
|
3569 |
|
|
#define bfd_elf32_mkobject elf_s390_mkobject
|
3570 |
|
|
#define elf_backend_object_p elf_s390_object_p
|
3571 |
|
|
|
3572 |
|
|
#include "elf32-target.h"
|