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| author | Jakub Jelinek <jakub@redhat.com> | 2004-04-23 08:51:10 +0000 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2004-04-23 08:51:10 +0000 |
| commit | 47a9f7b34f7a3421ea4d2f55406a24b8028337f9 (patch) | |
| tree | 52357912bb667a0950846cfd83bd45d7880af605 /bfd/elf64-x86-64.c | |
| parent | 1ffcab4b28f01b7b9933adff2c695a826136168c (diff) | |
| download | gdb-47a9f7b34f7a3421ea4d2f55406a24b8028337f9.zip gdb-47a9f7b34f7a3421ea4d2f55406a24b8028337f9.tar.gz gdb-47a9f7b34f7a3421ea4d2f55406a24b8028337f9.tar.bz2 | |
* 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.
Diffstat (limited to 'bfd/elf64-x86-64.c')
| -rw-r--r-- | bfd/elf64-x86-64.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c index 360d859..ee1b14e 100644 --- a/bfd/elf64-x86-64.c +++ b/bfd/elf64-x86-64.c @@ -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; } } |