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* elf-bfd.h (eh_cie_fde): Put cie_inf in a union.  Add a reloc_index
	field.  Use bitfields for fde_encoding, lsda_encoding and lsda_offset.
	* elf-eh-frame.c (extra_augmentation_data_bytes): Adjust cie_inf
	accesses after the above change.
	(_bfd_elf_eh_frame_section_offset): Likewise.
	(_bfd_elf_write_section_eh_frame): Likewise.
	(_bfd_elf_discard_section_eh_frame): Likewise.  Set up reloc_index.
This commit is contained in:
Richard Sandiford
2007-12-15 09:32:38 +00:00
parent 5241d85325
commit 155eaaa031
3 changed files with 38 additions and 20 deletions
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10
bfd/ChangeLog
View File

@ -1,3 +1,13 @@
2007-12-15 Richard Sandiford <rsandifo@nildram.co.uk>
* elf-bfd.h (eh_cie_fde): Put cie_inf in a union. Add a reloc_index
field. Use bitfields for fde_encoding, lsda_encoding and lsda_offset.
* elf-eh-frame.c (extra_augmentation_data_bytes): Adjust cie_inf
accesses after the above change.
(_bfd_elf_eh_frame_section_offset): Likewise.
(_bfd_elf_write_section_eh_frame): Likewise.
(_bfd_elf_discard_section_eh_frame): Likewise. Set up reloc_index.
2007-12-15 Richard Sandiford <rsandifo@nildram.co.uk> 2007-12-15 Richard Sandiford <rsandifo@nildram.co.uk>
* elf-bfd.h (_bfd_elf_gc_mark_rsec, _bfd_elf_gc_mark_reloc): Declare. * elf-bfd.h (_bfd_elf_gc_mark_rsec, _bfd_elf_gc_mark_reloc): Declare.

15
bfd/elf-bfd.h
View File

@ -264,14 +264,19 @@ struct elf_link_loaded_list
/* Structures used by the eh_frame optimization code. */ /* Structures used by the eh_frame optimization code. */
struct eh_cie_fde struct eh_cie_fde
{ {
/* For FDEs, this points to the CIE used. */ union {
struct eh_cie_fde *cie_inf; struct {
/* The CIE that we have chosen to use for this FDE. */
struct eh_cie_fde *cie_inf;
} fde;
} u;
unsigned int reloc_index;
unsigned int size; unsigned int size;
unsigned int offset; unsigned int offset;
unsigned int new_offset; unsigned int new_offset;
unsigned char fde_encoding; unsigned int fde_encoding : 8;
unsigned char lsda_encoding; unsigned int lsda_encoding : 8;
unsigned char lsda_offset; unsigned int lsda_offset : 8;
unsigned int cie : 1; unsigned int cie : 1;
unsigned int removed : 1; unsigned int removed : 1;
unsigned int add_augmentation_size : 1; unsigned int add_augmentation_size : 1;

33
bfd/elf-eh-frame.c
View File

@ -304,7 +304,7 @@ extra_augmentation_data_bytes (struct eh_cie_fde *entry)
} }
else else
{ {
if (entry->cie_inf->add_augmentation_size) if (entry->u.fde.cie_inf->add_augmentation_size)
size++; size++;
} }
return size; return size;
@ -572,6 +572,7 @@ _bfd_elf_discard_section_eh_frame
this_inf->offset = last_fde - ehbuf; this_inf->offset = last_fde - ehbuf;
this_inf->size = 4 + hdr_length; this_inf->size = 4 + hdr_length;
this_inf->reloc_index = cookie->rel - cookie->rels;
if (hdr_length == 0) if (hdr_length == 0)
{ {
@ -826,7 +827,7 @@ _bfd_elf_discard_section_eh_frame
} }
ecie->usage_count++; ecie->usage_count++;
hdr_info->fde_count++; hdr_info->fde_count++;
this_inf->cie_inf = (void *) (ecie - ecies); this_inf->u.fde.cie_inf = (void *) (ecie - ecies);
} }
/* Skip the initial location and address range. */ /* Skip the initial location and address range. */
@ -954,8 +955,8 @@ _bfd_elf_discard_section_eh_frame
{ {
if (!ent->cie) if (!ent->cie)
{ {
ecie = ecies + (bfd_hostptr_t) ent->cie_inf; ecie = ecies + (bfd_hostptr_t) ent->u.fde.cie_inf;
ent->cie_inf = ecie->cie.cie_inf; ent->u.fde.cie_inf = ecie->cie.cie_inf;
} }
ent->new_offset = offset; ent->new_offset = offset;
offset += size_of_output_cie_fde (ent, ptr_size); offset += size_of_output_cie_fde (ent, ptr_size);
@ -1116,20 +1117,20 @@ _bfd_elf_eh_frame_section_offset (bfd *output_bfd ATTRIBUTE_UNUSED,
/* If converting to DW_EH_PE_pcrel, there will be no need for run-time /* If converting to DW_EH_PE_pcrel, there will be no need for run-time
relocation against FDE's initial_location field. */ relocation against FDE's initial_location field. */
if (!sec_info->entry[mid].cie if (!sec_info->entry[mid].cie
&& sec_info->entry[mid].cie_inf->make_relative && sec_info->entry[mid].u.fde.cie_inf->make_relative
&& offset == sec_info->entry[mid].offset + 8) && offset == sec_info->entry[mid].offset + 8)
return (bfd_vma) -2; return (bfd_vma) -2;
/* If converting LSDA pointers to DW_EH_PE_pcrel, there will be no need /* If converting LSDA pointers to DW_EH_PE_pcrel, there will be no need
for run-time relocation against LSDA field. */ for run-time relocation against LSDA field. */
if (!sec_info->entry[mid].cie if (!sec_info->entry[mid].cie
&& sec_info->entry[mid].cie_inf->make_lsda_relative && sec_info->entry[mid].u.fde.cie_inf->make_lsda_relative
&& (offset == (sec_info->entry[mid].offset + 8 && (offset == (sec_info->entry[mid].offset + 8
+ sec_info->entry[mid].lsda_offset)) + sec_info->entry[mid].lsda_offset))
&& (sec_info->entry[mid].cie_inf->need_lsda_relative && (sec_info->entry[mid].u.fde.cie_inf->need_lsda_relative
|| !hdr_info->offsets_adjusted)) || !hdr_info->offsets_adjusted))
{ {
sec_info->entry[mid].cie_inf->need_lsda_relative = 1; sec_info->entry[mid].u.fde.cie_inf->need_lsda_relative = 1;
return (bfd_vma) -2; return (bfd_vma) -2;
} }
@ -1138,7 +1139,7 @@ _bfd_elf_eh_frame_section_offset (bfd *output_bfd ATTRIBUTE_UNUSED,
if (sec_info->entry[mid].set_loc if (sec_info->entry[mid].set_loc
&& (sec_info->entry[mid].cie && (sec_info->entry[mid].cie
? sec_info->entry[mid].make_relative ? sec_info->entry[mid].make_relative
: sec_info->entry[mid].cie_inf->make_relative) : sec_info->entry[mid].u.fde.cie_inf->make_relative)
&& (offset >= sec_info->entry[mid].offset + 8 && (offset >= sec_info->entry[mid].offset + 8
+ sec_info->entry[mid].set_loc[1])) + sec_info->entry[mid].set_loc[1]))
{ {
@ -1375,10 +1376,12 @@ _bfd_elf_write_section_eh_frame (bfd *abfd,
bfd_vma value, address; bfd_vma value, address;
unsigned int width; unsigned int width;
bfd_byte *start; bfd_byte *start;
struct eh_cie_fde *cie;
/* Skip length. */ /* Skip length. */
cie = ent->u.fde.cie_inf;
buf += 4; buf += 4;
value = ent->new_offset + 4 - ent->cie_inf->new_offset; value = ent->new_offset + 4 - cie->new_offset;
bfd_put_32 (abfd, value, buf); bfd_put_32 (abfd, value, buf);
buf += 4; buf += 4;
width = get_DW_EH_PE_width (ent->fde_encoding, ptr_size); width = get_DW_EH_PE_width (ent->fde_encoding, ptr_size);
@ -1406,7 +1409,7 @@ _bfd_elf_write_section_eh_frame (bfd *abfd,
address += sec->output_section->vma + ent->offset + 8; address += sec->output_section->vma + ent->offset + 8;
break; break;
} }
if (ent->cie_inf->make_relative) if (cie->make_relative)
value -= sec->output_section->vma + ent->new_offset + 8; value -= sec->output_section->vma + ent->new_offset + 8;
write_value (abfd, buf, value, width); write_value (abfd, buf, value, width);
} }
@ -1421,7 +1424,7 @@ _bfd_elf_write_section_eh_frame (bfd *abfd,
} }
if ((ent->lsda_encoding & 0xf0) == DW_EH_PE_pcrel if ((ent->lsda_encoding & 0xf0) == DW_EH_PE_pcrel
|| ent->cie_inf->need_lsda_relative) || cie->need_lsda_relative)
{ {
buf += ent->lsda_offset; buf += ent->lsda_offset;
width = get_DW_EH_PE_width (ent->lsda_encoding, ptr_size); width = get_DW_EH_PE_width (ent->lsda_encoding, ptr_size);
@ -1431,13 +1434,13 @@ _bfd_elf_write_section_eh_frame (bfd *abfd,
{ {
if ((ent->lsda_encoding & 0xf0) == DW_EH_PE_pcrel) if ((ent->lsda_encoding & 0xf0) == DW_EH_PE_pcrel)
value += ent->offset - ent->new_offset; value += ent->offset - ent->new_offset;
else if (ent->cie_inf->need_lsda_relative) else if (cie->need_lsda_relative)
value -= (sec->output_section->vma + ent->new_offset + 8 value -= (sec->output_section->vma + ent->new_offset + 8
+ ent->lsda_offset); + ent->lsda_offset);
write_value (abfd, buf, value, width); write_value (abfd, buf, value, width);
} }
} }
else if (ent->cie_inf->add_augmentation_size) else if (cie->add_augmentation_size)
{ {
/* Skip the PC and length and insert a zero byte for the /* Skip the PC and length and insert a zero byte for the
augmentation size. */ augmentation size. */
@ -1469,7 +1472,7 @@ _bfd_elf_write_section_eh_frame (bfd *abfd,
if ((ent->fde_encoding & 0xf0) == DW_EH_PE_pcrel) if ((ent->fde_encoding & 0xf0) == DW_EH_PE_pcrel)
value += ent->offset + 8 - new_offset; value += ent->offset + 8 - new_offset;
if (ent->cie_inf->make_relative) if (cie->make_relative)
value -= sec->output_section->vma + new_offset value -= sec->output_section->vma + new_offset
+ ent->set_loc[cnt]; + ent->set_loc[cnt];
write_value (abfd, buf, value, width); write_value (abfd, buf, value, width);