diff options
Diffstat (limited to 'bfd/elflink.h')
| -rw-r--r-- | bfd/elflink.h | 58 |
1 files changed, 47 insertions, 11 deletions
diff --git a/bfd/elflink.h b/bfd/elflink.h index b203908..91b7b67 100644 --- a/bfd/elflink.h +++ b/bfd/elflink.h @@ -492,14 +492,19 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash, represent variables; this can cause confusion in principle, but any such confusion would seem to indicate an erroneous program or shared library. We also permit a common symbol in a regular - object to override a weak symbol in a shared object. */ + object to override a weak symbol in a shared object. + + We prefer a non-weak definition in a shared library to a weak + definition in the executable. */ if (newdyn && newdef && (olddef || (h->root.type == bfd_link_hash_common && (bind == STB_WEAK - || ELF_ST_TYPE (sym->st_info) == STT_FUNC)))) + || ELF_ST_TYPE (sym->st_info) == STT_FUNC))) + && (h->root.type != bfd_link_hash_defweak + || bind == STB_WEAK)) { *override = true; newdef = false; @@ -543,7 +548,10 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash, As above, we again permit a common symbol in a regular object to override a definition in a shared object if the shared object - symbol is a function or is weak. */ + symbol is a function or is weak. + + As above, we permit a non-weak definition in a shared object to + override a weak definition in a regular object. */ if (! newdyn && (newdef @@ -552,7 +560,9 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash, || h->type == STT_FUNC))) && olddyn && olddef - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0) + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 + && (bind != STB_WEAK + || h->root.type == bfd_link_hash_defweak)) { /* Change the hash table entry to undefined, and let _bfd_generic_link_add_one_symbol do the right thing with the @@ -626,6 +636,31 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash, h->verinfo.vertree = NULL; } + /* Handle the special case of a weak definition in a regular object + followed by a non-weak definition in a shared object. In this + case, we prefer the definition in the shared object. To make + this work we have to frob the flags. */ + if (olddef + && ! olddyn + && h->root.type == bfd_link_hash_defweak + && newdef + && newdyn + && bind != STB_WEAK) + h->elf_link_hash_flags &= ~ ELF_LINK_HASH_DEF_REGULAR; + + /* Handle the special case of a non-weak definition in a shared + object followed by a weak definition in a regular object. In + this case we prefer to definition in the shared object. To make + this work we have to tell the caller to not treat the new symbol + as a definition. */ + if (olddef + && olddyn + && h->root.type != bfd_link_hash_defweak + && newdef + && ! newdyn + && bind == STB_WEAK) + *override = true; + return true; } @@ -4139,6 +4174,7 @@ elf_bfd_final_link (abfd, info) rel_hash = elf_section_data (o)->rel_hashes; rel_hdr = &elf_section_data (o)->rel_hdr; + BFD_ASSERT (elf_section_data (o)->rel_count == o->reloc_count); for (i = 0; i < o->reloc_count; i++, rel_hash++) { if (*rel_hash == NULL) @@ -5087,7 +5123,7 @@ elf_link_input_bfd (finfo, input_bfd) irela = internal_relocs; irelaend = irela + o->reloc_count; rel_hash = (elf_section_data (o->output_section)->rel_hashes - + o->output_section->reloc_count); + + elf_section_data (o->output_section)->rel_count); for (; irela < irelaend; irela++, rel_hash++) { unsigned long r_symndx; @@ -5277,7 +5313,7 @@ elf_reloc_link_order (output_bfd, info, output_section, link_order) /* Figure out the symbol index. */ rel_hash_ptr = (elf_section_data (output_section)->rel_hashes - + output_section->reloc_count); + + elf_section_data (output_section)->rel_count); if (link_order->type == bfd_section_reloc_link_order) { indx = link_order->u.reloc.p->u.section->target_index; @@ -5386,7 +5422,7 @@ elf_reloc_link_order (output_bfd, info, output_section, link_order) irel.r_offset = offset; irel.r_info = ELF_R_INFO (indx, howto->type); erel = ((Elf_External_Rel *) rel_hdr->contents - + output_section->reloc_count); + + elf_section_data (output_section)->rel_count); elf_swap_reloc_out (output_bfd, &irel, erel); } else @@ -5398,11 +5434,11 @@ elf_reloc_link_order (output_bfd, info, output_section, link_order) irela.r_info = ELF_R_INFO (indx, howto->type); irela.r_addend = addend; erela = ((Elf_External_Rela *) rel_hdr->contents - + output_section->reloc_count); + + elf_section_data (output_section)->rel_count); elf_swap_reloca_out (output_bfd, &irela, erela); } - ++output_section->reloc_count; + ++elf_section_data (output_section)->rel_count; return true; } @@ -5622,8 +5658,8 @@ elf_finish_pointer_linker_section (output_bfd, input_bfd, info, lsect, h, reloca elf_swap_reloca_out (output_bfd, &outrel, (((Elf_External_Rela *) lsect->section->contents) - + lsect->section->reloc_count)); - ++lsect->section->reloc_count; + + elf_section_data (lsect->section)->rel_count)); + ++elf_section_data (lsect->section)->rel_count; } } } |