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authorTristan Gingold <gingold@adacore.com>2017-03-31 15:25:18 +0200
committerTristan Gingold <gingold@adacore.com>2017-04-07 10:03:17 +0200
commit1fd6d111905e76dfa7af9fbee5229f3f1d360b4c (patch)
treecb8f9e966484f2911a9ef1f3d0df62d338701922 /bfd/coffgen.c
parent436252de3e9de546001c4312d0863ce7e10aa200 (diff)
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pe/coff: handle weak defined symbol for gc-sections.
bfd/ * coffgen.c (_bfd_coff_gc_mark_hook): Handle PE weak external symbols with a definition. (_bfd_coff_gc_mark_extra_sections): Fix typo. ld/ * testsuite/ld-pe/pe.exp: New test. * testsuite/ld-pe/weakdef-1.s: New test source. * testsuite/ld-pe/weakdef-1.d: New test.
Diffstat (limited to 'bfd/coffgen.c')
-rw-r--r--bfd/coffgen.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/bfd/coffgen.c b/bfd/coffgen.c
index 3c60ed4..18f423b 100644
--- a/bfd/coffgen.c
+++ b/bfd/coffgen.c
@@ -2785,8 +2785,22 @@ _bfd_coff_gc_mark_hook (asection *sec,
case bfd_link_hash_common:
return h->root.u.c.p->section;
- case bfd_link_hash_undefined:
case bfd_link_hash_undefweak:
+ if (h->symbol_class == C_NT_WEAK && h->numaux == 1)
+ {
+ /* PE weak externals. A weak symbol may include an auxiliary
+ record indicating that if the weak symbol is not resolved,
+ another external symbol is used instead. */
+ struct coff_link_hash_entry *h2 =
+ h->auxbfd->tdata.coff_obj_data->sym_hashes[
+ h->aux->x_sym.x_tagndx.l];
+
+ if (h2 && h2->root.type != bfd_link_hash_undefined)
+ return h2->root.u.def.section;
+ }
+ break;
+
+ case bfd_link_hash_undefined:
default:
break;
}
@@ -2897,7 +2911,7 @@ _bfd_coff_gc_mark_extra_sections (struct bfd_link_info *info,
asection *isec;
bfd_boolean some_kept;
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
+ if (bfd_get_flavour (ibfd) != bfd_target_coff_flavour)
continue;
/* Ensure all linker created sections are kept, and see whether