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* elf64-alpha.c (elf64_alpha_gc_mark_hook): New. 

(elf64_alpha_gc_sweep_hook): New.
        (elf_backend_gc_mark_hook, elf_backend_gc_sweep_hook): New.
        (elf_backend_can_gc_sections): New.
This commit is contained in:
Richard Henderson 2011-03-29 21:18:16 +00:00
parent 6294f8ea1e
commit e117360eb3
2 changed files with 99 additions and 1 deletions
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7
bfd/ChangeLog
View File

@ -1,3 +1,10 @@
2011-03-29 Richard Henderson <rth@redhat.com>
* elf64-alpha.c (elf64_alpha_gc_mark_hook): New.
(elf64_alpha_gc_sweep_hook): New.
(elf_backend_gc_mark_hook, elf_backend_gc_sweep_hook): New.
(elf_backend_can_gc_sections): New.
2011-03-26 John Marino <binutils@marino.st>
* config.bfd: Add x86_64-*-dragonfly*, fix i386-*-dragonfly*.

93
bfd/elf64-alpha.c
View File

@ -1,6 +1,6 @@
/* Alpha specific support for 64-bit ELF
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@tamu.edu>.
This file is part of BFD, the Binary File Descriptor library.
@ -1988,6 +1988,93 @@ elf64_alpha_check_relocs (bfd *abfd, struct bfd_link_info *info,
return TRUE;
}
/* Return the section that should be marked against GC for a given
relocation. */
static asection *
elf64_alpha_gc_mark_hook (asection *sec, struct bfd_link_info *info,
Elf_Internal_Rela *rel,
struct elf_link_hash_entry *h, Elf_Internal_Sym *sym)
{
/* These relocations don't really reference a symbol. Instead we store
extra data in their addend slot. Ignore the symbol. */
switch (ELF64_R_TYPE (rel->r_info))
{
case R_ALPHA_LITUSE:
case R_ALPHA_GPDISP:
case R_ALPHA_HINT:
return NULL;
}
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
}
/* Update the got entry reference counts for the section being removed. */
static bfd_boolean
elf64_alpha_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
asection *sec, const Elf_Internal_Rela *relocs)
{
Elf_Internal_Shdr *symtab_hdr;
struct alpha_elf_link_hash_entry **sym_hashes;
const Elf_Internal_Rela *rel, *relend;
if (info->relocatable)
return TRUE;
symtab_hdr = &elf_symtab_hdr (abfd);
sym_hashes = alpha_elf_sym_hashes (abfd);
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; rel++)
{
unsigned long r_symndx, r_type;
struct alpha_elf_link_hash_entry *h = NULL;
struct alpha_elf_got_entry *gotent;
r_symndx = ELF64_R_SYM (rel->r_info);
if (r_symndx >= symtab_hdr->sh_info)
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.root.type == bfd_link_hash_indirect
|| h->root.root.type == bfd_link_hash_warning)
h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
}
r_type = ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
case R_ALPHA_LITERAL:
/* ??? Ignore re-computation of gotent_flags. We're not
carrying a use-count for each bit in that mask. */
case R_ALPHA_TLSGD:
case R_ALPHA_GOTDTPREL:
case R_ALPHA_GOTTPREL:
/* Fetch the got entry from the tables. */
gotent = get_got_entry (abfd, h, r_type, r_symndx, rel->r_addend);
/* The got entry *must* exist, since we should have created it
before during check_relocs. Also note that get_got_entry
assumed this was going to be another use, and so incremented
the use count again. Thus the use count must be at least the
one real use and the "use" we just added. */
if (gotent == NULL || gotent->use_count < 2)
{
abort ();
return FALSE;
}
gotent->use_count -= 2;
break;
default:
break;
}
}
return TRUE;
}
/* Adjust a symbol defined by a dynamic object and referenced by a
regular object. The current definition is in some section of the
dynamic object, but we're not including those sections. We have to
@ -5384,6 +5471,10 @@ static const struct elf_size_info alpha_elf_size_info =
#define elf_backend_reloc_type_class \
elf64_alpha_reloc_type_class
#define elf_backend_can_gc_sections 1
#define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook
#define elf_backend_gc_sweep_hook elf64_alpha_gc_sweep_hook
#define elf_backend_ecoff_debug_swap \
&elf64_alpha_ecoff_debug_swap