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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [bfd/] [elf-eh-frame.c] - Diff between revs 14 and 161

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Rev 14 Rev 161
Line 1... Line 1...
/* .eh_frame section optimization.
/* .eh_frame section optimization.
   Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
   Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
   Free Software Foundation, Inc.
   Free Software Foundation, Inc.
   Written by Jakub Jelinek <jakub@redhat.com>.
   Written by Jakub Jelinek <jakub@redhat.com>.
 
 
   This file is part of BFD, the Binary File Descriptor library.
   This file is part of BFD, the Binary File Descriptor library.
 
 
Line 488... Line 488...
  htab = elf_hash_table (info);
  htab = elf_hash_table (info);
  hdr_info = &htab->eh_info;
  hdr_info = &htab->eh_info;
  if (hdr_info->parsed_eh_frames)
  if (hdr_info->parsed_eh_frames)
    return;
    return;
 
 
  if (sec->size == 0)
  if (sec->size == 0
 
      || sec->sec_info_type != ELF_INFO_TYPE_NONE)
    {
    {
      /* This file does not contain .eh_frame information.  */
      /* This file does not contain .eh_frame information.  */
      return;
      return;
    }
    }
 
 
Line 775... Line 776...
          this_inf->u.cie.per_encoding_relative
          this_inf->u.cie.per_encoding_relative
            = (cie->per_encoding & 0x70) == DW_EH_PE_pcrel;
            = (cie->per_encoding & 0x70) == DW_EH_PE_pcrel;
        }
        }
      else
      else
        {
        {
          asection *rsec;
 
 
 
          /* Find the corresponding CIE.  */
          /* Find the corresponding CIE.  */
          unsigned int cie_offset = this_inf->offset + 4 - hdr_id;
          unsigned int cie_offset = this_inf->offset + 4 - hdr_id;
          for (cie = local_cies; cie < local_cies + cie_count; cie++)
          for (cie = local_cies; cie < local_cies + cie_count; cie++)
            if (cie_offset == cie->cie_inf->offset)
            if (cie_offset == cie->cie_inf->offset)
              break;
              break;
Line 792... Line 791...
          this_inf->make_relative = cie->cie_inf->make_relative;
          this_inf->make_relative = cie->cie_inf->make_relative;
          this_inf->add_augmentation_size
          this_inf->add_augmentation_size
            = cie->cie_inf->add_augmentation_size;
            = cie->cie_inf->add_augmentation_size;
 
 
          ENSURE_NO_RELOCS (buf);
          ENSURE_NO_RELOCS (buf);
 
          if ((sec->flags & SEC_LINKER_CREATED) == 0 || cookie->rels != NULL)
 
            {
 
              asection *rsec;
 
 
          REQUIRE (GET_RELOC (buf));
          REQUIRE (GET_RELOC (buf));
 
 
          /* Chain together the FDEs for each section.  */
          /* Chain together the FDEs for each section.  */
          rsec = _bfd_elf_gc_mark_rsec (info, sec, gc_mark_hook, cookie);
          rsec = _bfd_elf_gc_mark_rsec (info, sec, gc_mark_hook, cookie);
          /* RSEC will be NULL if FDE was cleared out as it was belonging to
          /* RSEC will be NULL if FDE was cleared out as it was belonging to
Line 804... Line 807...
            {
            {
              REQUIRE (rsec->owner == abfd);
              REQUIRE (rsec->owner == abfd);
              this_inf->u.fde.next_for_section = elf_fde_list (rsec);
              this_inf->u.fde.next_for_section = elf_fde_list (rsec);
              elf_fde_list (rsec) = this_inf;
              elf_fde_list (rsec) = this_inf;
            }
            }
 
            }
 
 
          /* Skip the initial location and address range.  */
          /* Skip the initial location and address range.  */
          start = buf;
          start = buf;
          length = get_DW_EH_PE_width (cie->fde_encoding, ptr_size);
          length = get_DW_EH_PE_width (cie->fde_encoding, ptr_size);
          REQUIRE (skip_bytes (&buf, end, 2 * length));
          REQUIRE (skip_bytes (&buf, end, 2 * length));
Line 1131... Line 1135...
  struct eh_cie_fde *ent;
  struct eh_cie_fde *ent;
  struct eh_frame_sec_info *sec_info;
  struct eh_frame_sec_info *sec_info;
  struct eh_frame_hdr_info *hdr_info;
  struct eh_frame_hdr_info *hdr_info;
  unsigned int ptr_size, offset;
  unsigned int ptr_size, offset;
 
 
 
  if (sec->sec_info_type != ELF_INFO_TYPE_EH_FRAME)
 
    return FALSE;
 
 
  sec_info = (struct eh_frame_sec_info *) elf_section_data (sec)->sec_info;
  sec_info = (struct eh_frame_sec_info *) elf_section_data (sec)->sec_info;
  if (sec_info == NULL)
  if (sec_info == NULL)
    return FALSE;
    return FALSE;
 
 
 
  ptr_size = (get_elf_backend_data (sec->owner)
 
              ->elf_backend_eh_frame_address_size (sec->owner, sec));
 
 
  hdr_info = &elf_hash_table (info)->eh_info;
  hdr_info = &elf_hash_table (info)->eh_info;
  for (ent = sec_info->entry; ent < sec_info->entry + sec_info->count; ++ent)
  for (ent = sec_info->entry; ent < sec_info->entry + sec_info->count; ++ent)
    if (ent->size == 4)
    if (ent->size == 4)
      /* There should only be one zero terminator, on the last input
      /* There should only be one zero terminator, on the last input
         file supplying .eh_frame (crtend.o).  Remove any others.  */
         file supplying .eh_frame (crtend.o).  Remove any others.  */
      ent->removed = sec->map_head.s != NULL;
      ent->removed = sec->map_head.s != NULL;
    else if (!ent->cie)
    else if (!ent->cie)
      {
      {
 
        bfd_boolean keep;
 
        if ((sec->flags & SEC_LINKER_CREATED) != 0 && cookie->rels == NULL)
 
          {
 
            unsigned int width
 
              = get_DW_EH_PE_width (ent->fde_encoding, ptr_size);
 
            bfd_vma value
 
              = read_value (abfd, sec->contents + ent->offset + 8 + width,
 
                            width, get_DW_EH_PE_signed (ent->fde_encoding));
 
            keep = value != 0;
 
          }
 
        else
 
          {
        cookie->rel = cookie->rels + ent->reloc_index;
        cookie->rel = cookie->rels + ent->reloc_index;
        /* FIXME: octets_per_byte.  */
        /* FIXME: octets_per_byte.  */
        BFD_ASSERT (cookie->rel < cookie->relend
        BFD_ASSERT (cookie->rel < cookie->relend
                    && cookie->rel->r_offset == ent->offset + 8);
                    && cookie->rel->r_offset == ent->offset + 8);
        if (!(*reloc_symbol_deleted_p) (ent->offset + 8, cookie))
            keep = !(*reloc_symbol_deleted_p) (ent->offset + 8, cookie);
 
          }
 
        if (keep)
          {
          {
            if (info->shared
            if (info->shared
                && (((ent->fde_encoding & 0x70) == DW_EH_PE_absptr
                && (((ent->fde_encoding & 0x70) == DW_EH_PE_absptr
                     && ent->make_relative == 0)
                     && ent->make_relative == 0)
                    || (ent->fde_encoding & 0x70) == DW_EH_PE_aligned))
                    || (ent->fde_encoding & 0x70) == DW_EH_PE_aligned))
Line 1176... Line 1200...
    {
    {
      free (sec_info->cies);
      free (sec_info->cies);
      sec_info->cies = NULL;
      sec_info->cies = NULL;
    }
    }
 
 
  ptr_size = (get_elf_backend_data (sec->owner)
 
              ->elf_backend_eh_frame_address_size (sec->owner, sec));
 
  offset = 0;
  offset = 0;
  for (ent = sec_info->entry; ent < sec_info->entry + sec_info->count; ++ent)
  for (ent = sec_info->entry; ent < sec_info->entry + sec_info->count; ++ent)
    if (!ent->removed)
    if (!ent->removed)
      {
      {
        ent->new_offset = offset;
        ent->new_offset = offset;

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