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