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* elf32-vax.c (elf_vax_check_relocs): Remove unused

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local_got_refcounts usage.  Remove allocation of got slot.
(elf_vax_gc_sweep_hook): Remove unused local_got_refcounts usage.
Remove de-allocation of got slot.
(elf_vax_size_dynamic_section): Fix some indentation.  Add hash
traversal for elf_vax_instantiate_got_entries.  Allow empty .got
sections to be GC'ed.
(elf_vax_instantiate_got_entries): New function.
(elf_vax_relocate_section): Simplify R_VAX_GOT32 handling.  Remove
tests that are now handled by elf_vax_instantiate_got_entries.
Assert GOT entry falls within .got section size.  Remove redundant
comparisions.  Fix comments.
This commit is contained in:
Jason Thorpe 2002-09-27 22:28:17 +00:00
parent 167baebf18
commit b29635ba03
2 changed files with 104 additions and 72 deletions
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15
bfd/ChangeLog
View file

@ -1,3 +1,18 @@
2002-09-27 Matt Thomas <matt@3am-software.com>
* elf32-vax.c (elf_vax_check_relocs): Remove unused
local_got_refcounts usage. Remove allocation of got slot.
(elf_vax_gc_sweep_hook): Remove unused local_got_refcounts usage.
Remove de-allocation of got slot.
(elf_vax_size_dynamic_section): Fix some indentation. Add hash
traversal for elf_vax_instantiate_got_entries. Allow empty .got
sections to be GC'ed.
(elf_vax_instantiate_got_entries): New function.
(elf_vax_relocate_section): Simplify R_VAX_GOT32 handling. Remove
tests that are now handled by elf_vax_instantiate_got_entries.
Assert GOT entry falls within .got section size. Remove redundant
comparisions. Fix comments.
2002-09-27 Jakub Jelinek <jakub@redhat.com>
* reloc.c: Add x86-64 TLS relocs.

161
bfd/elf32-vax.c
View file

@ -417,6 +417,11 @@ struct elf_vax_link_hash_table
static boolean elf_vax_discard_copies
PARAMS ((struct elf_vax_link_hash_entry *, PTR));
/* Declare this now that the above structures are defined. */
static boolean elf_vax_instantiate_got_entries
PARAMS ((struct elf_link_hash_entry *, PTR));
/* Traverse an VAX ELF linker hash table. */
#define elf_vax_link_hash_traverse(table, func, info) \
@ -567,7 +572,6 @@ elf_vax_check_relocs (abfd, info, sec, relocs)
bfd *dynobj;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
asection *sgot;
@ -580,7 +584,6 @@ elf_vax_check_relocs (abfd, info, sec, relocs)
dynobj = elf_hash_table (info)->dynobj;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
local_got_refcounts = elf_local_got_refcounts (abfd);
sgot = NULL;
srelgot = NULL;
@ -651,18 +654,6 @@ elf_vax_check_relocs (abfd, info, sec, relocs)
{
h->got.refcount = 1;
eh->got_addend = rel->r_addend;
/* Make sure this symbol is output as a dynamic symbol. */
if (h->dynindx == -1)
{
if (!bfd_elf32_link_record_dynamic_symbol (info, h))
return false;
}
/* Allocate space in the .got section. */
sgot->_raw_size += 4;
/* Allocate relocation space. */
srelgot->_raw_size += sizeof (Elf32_External_Rela);
}
else
{
@ -900,25 +891,18 @@ elf_vax_gc_sweep_hook (abfd, info, sec, relocs)
{
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel, *relend;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
bfd *dynobj;
asection *sgot;
asection *srelgot;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
local_got_refcounts = elf_local_got_refcounts (abfd);
dynobj = elf_hash_table (info)->dynobj;
if (dynobj == NULL)
return true;
sgot = bfd_get_section_by_name (dynobj, ".got");
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; rel++)
{
@ -930,29 +914,7 @@ elf_vax_gc_sweep_hook (abfd, info, sec, relocs)
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
if (h->got.refcount > 0)
{
--h->got.refcount;
if (h->got.refcount == 0)
{
/* We don't need the .got entry any more. */
sgot->_raw_size -= 4;
srelgot->_raw_size -= sizeof (Elf32_External_Rela);
}
}
}
else if (local_got_refcounts != NULL)
{
if (local_got_refcounts[r_symndx] > 0)
{
--local_got_refcounts[r_symndx];
if (local_got_refcounts[r_symndx] == 0)
{
/* We don't need the .got entry any more. */
sgot->_raw_size -= 4;
if (info->shared)
srelgot->_raw_size -= sizeof (Elf32_External_Rela);
}
}
--h->got.refcount;
}
break;
@ -1219,8 +1181,15 @@ elf_vax_size_dynamic_sections (output_bfd, info)
fill them in in the relocate_section routine. */
if (info->shared && info->symbolic)
elf_vax_link_hash_traverse (elf_vax_hash_table (info),
elf_vax_discard_copies,
(PTR) NULL);
elf_vax_discard_copies,
(PTR) NULL);
/* If this is a -Bsymbolic shared link or a static link, we need to
discard all the got entries we've recorded. Otherwise, we need to
instantiate (allocate space for them). */
elf_link_hash_traverse (elf_hash_table (info),
elf_vax_instantiate_got_entries,
(PTR) info);
/* The check_relocs and adjust_dynamic_symbol entry points have
determined the sizes of the various dynamic sections. Allocate
@ -1301,7 +1270,16 @@ elf_vax_size_dynamic_sections (output_bfd, info)
s->reloc_count = 0;
}
}
else if (strncmp (name, ".got", 4) != 0)
else if (strncmp (name, ".got", 4) == 0)
{
if (s->_raw_size == 0)
{
/* Strip this section if we don't need it; see the
comment below. */
strip = true;
}
}
else
{
/* It's not one of our sections, so don't allocate space. */
continue;
@ -1390,6 +1368,60 @@ elf_vax_discard_copies (h, ignore)
return true;
}
/* This function is called via elf_link_hash_traverse. It looks for entries
that have GOT or PLT (.GOT) references. If creating a static object or a
shared object with -Bsymbolic, it resets the reference count back to 0
and sets the offset to -1 so normal PC32 relocation will be done. If
creating a shared object or executable, space in the .got and .rela.got
will be reserved for the symbol. */
/*ARGSUSED*/
static boolean
elf_vax_instantiate_got_entries (h, infoptr)
struct elf_link_hash_entry *h;
PTR infoptr;
{
struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
bfd *dynobj;
asection *sgot;
asection *srelgot;
/* We don't care about non-GOT (and non-PLT) entries. */
if (h->got.refcount <= 0 && h->plt.refcount <= 0)
return true;
dynobj = elf_hash_table (info)->dynobj;
if (dynobj == NULL)
return true;
sgot = bfd_get_section_by_name (dynobj, ".got");
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
if (!elf_hash_table (info)->dynamic_sections_created
|| (info->shared && info->symbolic))
{
h->got.refcount = 0;
h->got.offset = (bfd_vma) -1;
h->plt.refcount = 0;
h->plt.offset = (bfd_vma) -1;
}
else if (h->got.refcount > 0)
{
/* Make sure this symbol is output as a dynamic symbol. */
if (h->dynindx == -1)
{
if (!bfd_elf32_link_record_dynamic_symbol (info, h))
return false;
}
/* Allocate space in the .got and .rela.got sections. */
sgot->_raw_size += 4;
srelgot->_raw_size += sizeof (Elf32_External_Rela);
}
return true;
}
/* Relocate an VAX ELF section. */
static boolean
@ -1537,8 +1569,7 @@ elf_vax_relocate_section (output_bfd, info, input_bfd, input_section,
case R_VAX_GOT32:
/* Relocation is to the address of the entry for this symbol
in the global offset table. */
if (h != NULL
&& strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
if (h == NULL || h->got.offset == (bfd_vma) -1)
break;
/* Relocation is the offset of the entry for this symbol in
@ -1547,18 +1578,6 @@ elf_vax_relocate_section (output_bfd, info, input_bfd, input_section,
{
bfd_vma off;
if (!elf_hash_table (info)->dynamic_sections_created
|| (h == NULL)
|| (info->shared
&& info->symbolic
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
{
/* This is actually a static link, or it is a -Bsymbolic link
and the symbol is defined locally or there is no symbol.
Change the GOT32 entry to a PC32 entry. */
break;
}
if (sgot == NULL)
{
sgot = bfd_get_section_by_name (dynobj, ".got");
@ -1568,6 +1587,7 @@ elf_vax_relocate_section (output_bfd, info, input_bfd, input_section,
BFD_ASSERT (h != NULL);
off = h->got.offset;
BFD_ASSERT (off != (bfd_vma) -1);
BFD_ASSERT (off < sgot->_raw_size);
if (info->shared
&& h->dynindx == -1
@ -1596,15 +1616,12 @@ elf_vax_relocate_section (output_bfd, info, input_bfd, input_section,
}
relocation = sgot->output_offset + off;
/* Neither GOT relocation uses the addend. */
/* The GOT relocation uses the addend. */
rel->r_addend = 0;
if (r_type == R_VAX_GOT32)
{
/* Change the reference to be indirect */
contents[rel->r_offset - 1] |= 0x10;
relocation += sgot->output_section->vma;
}
/* Change the reference to be indirect. */
contents[rel->r_offset - 1] |= 0x10;
relocation += sgot->output_section->vma;
}
break;
@ -1828,11 +1845,11 @@ elf_vax_relocate_section (output_bfd, info, input_bfd, input_section,
break;
}
/* VAX PCREL relocations are from the end of relocation, not the start */
/* VAX PCREL relocations are from the end of relocation, not the start.
So subtract the difference from the relocation amount since we can't
add it to the offset. */
if (howto->pc_relative && howto->pcrel_offset)
{
relocation -= bfd_get_reloc_size(howto);
}
relocation -= bfd_get_reloc_size(howto);
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset,