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| author | Alan Modra <amodra@gmail.com> | 2010-01-25 06:47:16 +0000 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2010-01-25 06:47:16 +0000 |
| commit | 766bc6567a42d77ac24103c5f7b9e14aaab81bba (patch) | |
| tree | 6cb67fa0f34112fa7ee7a91847c496fdc9067e55 /bfd/elf64-ppc.c | |
| parent | d2c7a1a63b98c1add3d78ba71ffa9f2a105c1cd4 (diff) | |
| download | gdb-766bc6567a42d77ac24103c5f7b9e14aaab81bba.zip gdb-766bc6567a42d77ac24103c5f7b9e14aaab81bba.tar.gz gdb-766bc6567a42d77ac24103c5f7b9e14aaab81bba.tar.bz2 | |
PR ld/11217
* elf64-ppc.c (ppc64_elf_tls_optimize): Optimize tls sequences
with relocations against undefined weak symbols.
(ppc64_elf_relocate_section): Don't optimize calls to undefined
weak functions if the symbol is dynamic.
(ppc64_elf_relocate_section): Edit tprel tls sequences.
* elf32-ppc.c (ppc_elf_relocate_section): Likewise.
(_bfd_elf_ppc_at_tprel_transform): New function.
* bfd-in.h (_bfd_elf_ppc_at_tprel_transform): Declare.
* bfd-in2.h: Regenerate.
Diffstat (limited to 'bfd/elf64-ppc.c')
| -rw-r--r-- | bfd/elf64-ppc.c | 42 |
1 files changed, 34 insertions, 8 deletions
diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c index 6648ddc..4a46881 100644 --- a/bfd/elf64-ppc.c +++ b/bfd/elf64-ppc.c @@ -7409,10 +7409,13 @@ ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info) if (h != NULL) { - if (h->root.type != bfd_link_hash_defined - && h->root.type != bfd_link_hash_defweak) + if (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + value = h->root.u.def.value; + else if (h->root.type == bfd_link_hash_undefweak) + value = 0; + else continue; - value = h->root.u.def.value; } else /* Symbols referenced by TLS relocs must be of type @@ -7425,11 +7428,17 @@ ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info) || !h->def_dynamic) { is_local = TRUE; - value += sym_sec->output_offset; - value += sym_sec->output_section->vma; - value -= htab->elf.tls_sec->vma; - ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31) - < (bfd_vma) 1 << 32); + if (h != NULL + && h->root.type == bfd_link_hash_undefweak) + ok_tprel = TRUE; + else + { + value += sym_sec->output_offset; + value += sym_sec->output_section->vma; + value -= htab->elf.tls_sec->vma; + ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31) + < (bfd_vma) 1 << 32); + } } r_type = ELF64_R_TYPE (rel->r_info); @@ -11498,6 +11507,7 @@ ppc64_elf_relocate_section (bfd *output_bfd, checking whether the function is defined. */ else if (h != NULL && h->elf.root.type == bfd_link_hash_undefweak + && h->elf.dynindx == -1 && r_type == R_PPC64_REL24 && relocation == 0 && addend == 0) @@ -11833,6 +11843,22 @@ ppc64_elf_relocate_section (bfd *output_bfd, case R_PPC64_TPREL16_HIGHERA: case R_PPC64_TPREL16_HIGHEST: case R_PPC64_TPREL16_HIGHESTA: + if (h != NULL + && h->elf.root.type == bfd_link_hash_undefweak + && h->elf.dynindx == -1) + { + /* Make this relocation against an undefined weak symbol + resolve to zero. This is really just a tweak, since + code using weak externs ought to check that they are + defined before using them. */ + bfd_byte *p = contents + rel->r_offset - d_offset; + + insn = bfd_get_32 (output_bfd, p); + insn = _bfd_elf_ppc_at_tprel_transform (insn, 13); + if (insn != 0) + bfd_put_32 (output_bfd, insn, p); + break; + } addend -= htab->elf.tls_sec->vma + TP_OFFSET; if (info->shared) /* The TPREL16 relocs shouldn't really be used in shared |