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* elf64-x86-64.c (elf64_x86_64_copy_indirect_symbol): Copy also 

ELF_LINK_POINTER_EQUALITY_NEEDED.
	(elf64_x86_64_check_relocs): Set ELF_LINK_POINTER_EQUALITY_NEEDED
	if r_type is not R_X86_64_PC32.
	(elf64_x86_64_finish_dynamic_symbol): If
	ELF_LINK_POINTER_EQUALITY_NEEDED is not set, clear st_value of
	SHN_UNDEF symbols.
This commit is contained in:
Jakub Jelinek 2004-04-23 08:51:10 +00:00
parent 1ffcab4b28
commit 47a9f7b34f
2 changed files with 21 additions and 3 deletions
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10
bfd/ChangeLog
View File

@ -1,3 +1,13 @@
2004-04-22 Jakub Jelinek <jakub@redhat.com>
* elf64-x86-64.c (elf64_x86_64_copy_indirect_symbol): Copy also
ELF_LINK_POINTER_EQUALITY_NEEDED.
(elf64_x86_64_check_relocs): Set ELF_LINK_POINTER_EQUALITY_NEEDED
if r_type is not R_X86_64_PC32.
(elf64_x86_64_finish_dynamic_symbol): If
ELF_LINK_POINTER_EQUALITY_NEEDED is not set, clear st_value of
SHN_UNDEF symbols.
2004-04-22 Kaz Kojima <kkojima@rr.iij4u.or.jp>
* elf32-sh.c (sh_elf_plt_sym_val): New function.

14
bfd/elf64-x86-64.c
View File

@ -561,7 +561,8 @@ elf64_x86_64_copy_indirect_symbol (const struct elf_backend_data *bed,
(ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
| ELF_LINK_HASH_REF_REGULAR
| ELF_LINK_HASH_REF_REGULAR_NONWEAK
| ELF_LINK_HASH_NEEDS_PLT));
| ELF_LINK_HASH_NEEDS_PLT
| ELF_LINK_POINTER_EQUALITY_NEEDED));
else
_bfd_elf_link_hash_copy_indirect (bed, dir, ind);
}
@ -812,6 +813,8 @@ elf64_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
/* We may need a .plt entry if the function this reloc
refers to is in a shared lib. */
h->plt.refcount += 1;
if (r_type != R_X86_64_PC32)
h->elf_link_hash_flags |= ELF_LINK_POINTER_EQUALITY_NEEDED;
}
/* If we are creating a shared library, and this is a reloc
@ -2519,11 +2522,16 @@ elf64_x86_64_finish_dynamic_symbol (bfd *output_bfd,
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
{
/* Mark the symbol as undefined, rather than as defined in
the .plt section. Leave the value alone. This is a clue
the .plt section. Leave the value if there were any
relocations where pointer equality matters (this is a clue
for the dynamic linker, to make function pointer
comparisons work between an application and shared
library. */
library), otherwise set it to zero. If a function is only
called from a binary, there is no need to slow down
shared libraries because of that. */
sym->st_shndx = SHN_UNDEF;
if ((h->elf_link_hash_flags & ELF_LINK_POINTER_EQUALITY_NEEDED) == 0)
sym->st_value = 0;
}
}