/* .eh_frame section optimization.
- Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011,
- 2012 Free Software Foundation, Inc.
+ Copyright (C) 2001-2014 Free Software Foundation, Inc.
Written by Jakub Jelinek <jakub@redhat.com>.
This file is part of BFD, the Binary File Descriptor library.
bfd_vma augmentation_size;
union {
struct elf_link_hash_entry *h;
- bfd_vma val;
+ struct {
+ unsigned int bfd_id;
+ unsigned int index;
+ } sym;
unsigned int reloc_index;
} personality;
asection *output_sec;
&& c1->lsda_encoding == c2->lsda_encoding
&& c1->fde_encoding == c2->fde_encoding
&& c1->initial_insn_length == c2->initial_insn_length
+ && c1->initial_insn_length <= sizeof (c1->initial_instructions)
&& memcmp (c1->initial_instructions,
c2->initial_instructions,
c1->initial_insn_length) == 0)
cie_compute_hash (struct cie *c)
{
hashval_t h = 0;
+ size_t len;
h = iterative_hash_object (c->length, h);
h = iterative_hash_object (c->version, h);
h = iterative_hash (c->augmentation, strlen (c->augmentation) + 1, h);
h = iterative_hash_object (c->lsda_encoding, h);
h = iterative_hash_object (c->fde_encoding, h);
h = iterative_hash_object (c->initial_insn_length, h);
- h = iterative_hash (c->initial_instructions, c->initial_insn_length, h);
+ len = c->initial_insn_length;
+ if (len > sizeof (c->initial_instructions))
+ len = sizeof (c->initial_instructions);
+ h = iterative_hash (c->initial_instructions, len, h);
c->hash = h;
return h;
}
cie->fde_encoding = DW_EH_PE_absptr;
initial_insn_length = end - buf;
- if (initial_insn_length <= sizeof (cie->initial_instructions))
- {
- cie->initial_insn_length = initial_insn_length;
- memcpy (cie->initial_instructions, buf, initial_insn_length);
- }
+ cie->initial_insn_length = initial_insn_length;
+ memcpy (cie->initial_instructions, buf,
+ initial_insn_length <= sizeof (cie->initial_instructions)
+ ? initial_insn_length : sizeof (cie->initial_instructions));
insns = buf;
buf += initial_insn_length;
ENSURE_NO_RELOCS (buf);
{
bfd_boolean per_binds_local;
- /* Work out the address of personality routine, either as an absolute
- value or as a symbol. */
+ /* Work out the address of personality routine, or at least
+ enough info that we could calculate the address had we made a
+ final section layout. The symbol on the reloc is enough,
+ either the hash for a global, or (bfd id, index) pair for a
+ local. The assumption here is that no one uses addends on
+ the reloc. */
rel = cookie->rels + cie->personality.reloc_index;
memset (&cie->personality, 0, sizeof (cie->personality));
#ifdef BFD64
return cie_inf;
cie->local_personality = 1;
- cie->personality.val = (sym->st_value
- + sym_sec->output_offset
- + sym_sec->output_section->vma);
+ cie->personality.sym.bfd_id = abfd->id;
+ cie->personality.sym.index = r_symndx;
per_binds_local = TRUE;
}
if (hdr_info->table)
sec->size += 4 + hdr_info->fde_count * 8;
- elf_tdata (abfd)->eh_frame_hdr = sec;
+ elf_eh_frame_hdr (abfd) = sec;
return TRUE;
}
struct elf_link_hash_table *htab;
struct eh_frame_hdr_info *hdr_info;
asection *sec;
- bfd_byte *contents;
- asection *eh_frame_sec;
- bfd_size_type size;
- bfd_boolean retval;
- bfd_vma encoded_eh_frame;
+ bfd_boolean retval = TRUE;
htab = elf_hash_table (info);
hdr_info = &htab->eh_info;
sec = hdr_info->hdr_sec;
- if (sec == NULL)
- return TRUE;
- size = EH_FRAME_HDR_SIZE;
- if (hdr_info->array && hdr_info->array_count == hdr_info->fde_count)
- size += 4 + hdr_info->fde_count * 8;
- contents = (bfd_byte *) bfd_malloc (size);
- if (contents == NULL)
- return FALSE;
-
- eh_frame_sec = bfd_get_section_by_name (abfd, ".eh_frame");
- if (eh_frame_sec == NULL)
+ if (info->eh_frame_hdr && sec != NULL)
{
- free (contents);
- return FALSE;
- }
+ bfd_byte *contents;
+ asection *eh_frame_sec;
+ bfd_size_type size;
+ bfd_vma encoded_eh_frame;
+
+ size = EH_FRAME_HDR_SIZE;
+ if (hdr_info->array && hdr_info->array_count == hdr_info->fde_count)
+ size += 4 + hdr_info->fde_count * 8;
+ contents = (bfd_byte *) bfd_malloc (size);
+ if (contents == NULL)
+ return FALSE;
- memset (contents, 0, EH_FRAME_HDR_SIZE);
- contents[0] = 1; /* Version. */
- contents[1] = get_elf_backend_data (abfd)->elf_backend_encode_eh_address
- (abfd, info, eh_frame_sec, 0, sec, 4,
- &encoded_eh_frame); /* .eh_frame offset. */
+ eh_frame_sec = bfd_get_section_by_name (abfd, ".eh_frame");
+ if (eh_frame_sec == NULL)
+ {
+ free (contents);
+ return FALSE;
+ }
- if (hdr_info->array && hdr_info->array_count == hdr_info->fde_count)
- {
- contents[2] = DW_EH_PE_udata4; /* FDE count encoding. */
- contents[3] = DW_EH_PE_datarel | DW_EH_PE_sdata4; /* Search table enc. */
- }
- else
- {
- contents[2] = DW_EH_PE_omit;
- contents[3] = DW_EH_PE_omit;
- }
- bfd_put_32 (abfd, encoded_eh_frame, contents + 4);
+ memset (contents, 0, EH_FRAME_HDR_SIZE);
+ /* Version. */
+ contents[0] = 1;
+ /* .eh_frame offset. */
+ contents[1] = get_elf_backend_data (abfd)->elf_backend_encode_eh_address
+ (abfd, info, eh_frame_sec, 0, sec, 4, &encoded_eh_frame);
- if (contents[2] != DW_EH_PE_omit)
- {
- unsigned int i;
+ if (hdr_info->array && hdr_info->array_count == hdr_info->fde_count)
+ {
+ /* FDE count encoding. */
+ contents[2] = DW_EH_PE_udata4;
+ /* Search table encoding. */
+ contents[3] = DW_EH_PE_datarel | DW_EH_PE_sdata4;
+ }
+ else
+ {
+ contents[2] = DW_EH_PE_omit;
+ contents[3] = DW_EH_PE_omit;
+ }
+ bfd_put_32 (abfd, encoded_eh_frame, contents + 4);
- bfd_put_32 (abfd, hdr_info->fde_count, contents + EH_FRAME_HDR_SIZE);
- qsort (hdr_info->array, hdr_info->fde_count, sizeof (*hdr_info->array),
- vma_compare);
- for (i = 0; i < hdr_info->fde_count; i++)
+ if (contents[2] != DW_EH_PE_omit)
{
- bfd_put_32 (abfd,
- hdr_info->array[i].initial_loc
- - sec->output_section->vma,
- contents + EH_FRAME_HDR_SIZE + i * 8 + 4);
- bfd_put_32 (abfd,
- hdr_info->array[i].fde - sec->output_section->vma,
- contents + EH_FRAME_HDR_SIZE + i * 8 + 8);
+ unsigned int i;
+
+ bfd_put_32 (abfd, hdr_info->fde_count, contents + EH_FRAME_HDR_SIZE);
+ qsort (hdr_info->array, hdr_info->fde_count,
+ sizeof (*hdr_info->array), vma_compare);
+ for (i = 0; i < hdr_info->fde_count; i++)
+ {
+ bfd_put_32 (abfd,
+ hdr_info->array[i].initial_loc
+ - sec->output_section->vma,
+ contents + EH_FRAME_HDR_SIZE + i * 8 + 4);
+ bfd_put_32 (abfd,
+ hdr_info->array[i].fde - sec->output_section->vma,
+ contents + EH_FRAME_HDR_SIZE + i * 8 + 8);
+ }
}
- }
- /* FIXME: octets_per_byte. */
- retval = bfd_set_section_contents (abfd, sec->output_section,
- contents, (file_ptr) sec->output_offset,
- sec->size);
- free (contents);
+ /* FIXME: octets_per_byte. */
+ retval = bfd_set_section_contents (abfd, sec->output_section, contents,
+ (file_ptr) sec->output_offset,
+ sec->size);
+ free (contents);
+ }
+ if (hdr_info->array != NULL)
+ free (hdr_info->array);
return retval;
}
projects / binutils-gdb.git / blobdiff