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ELF: Properly handle section symbols

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When defining the section symbol, __start_FOO, for the section FOO:

1. Treat the common symbol, __start_FOO, in input object file as
definition.
2. Clear verinfo.verdef.

bfd/

	PR ld/26094
	* elflink.c (bfd_elf_define_start_stop): Handle common symbols.
	Clear verinfo.verdef.

ld/

	PR ld/26094
	* testsuite/ld-elf/pr26094-1.ver: New fike.
	* testsuite/ld-elf/pr26094-1a.c: Likewise.
	* testsuite/ld-elf/pr26094-1a.rd: Likewise.
	* testsuite/ld-elf/pr26094-1b.c: Likewise.
	* testsuite/ld-elf/pr26094-1b.rd: Likewise.
	* testsuite/ld-elf/pr26094-1c.c: Likewise.
	* testsuite/ld-elf/shared.exp: Run ld/26094 tests.
This commit is contained in:
H.J. Lu
2020-06-10 05:31:19 -07:00
parent 25065fcd19
commit e1b5d517d1
10 changed files with 80 additions and 1 deletions
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6
bfd/elflink.c
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@ -14802,12 +14802,16 @@ bfd_elf_define_start_stop (struct bfd_link_info *info,
h = elf_link_hash_lookup (elf_hash_table (info), symbol,
FALSE, FALSE, TRUE);
/* NB: Common symbols will be turned into definition later. */
if (h != NULL
&& (h->root.type == bfd_link_hash_undefined
|| h->root.type == bfd_link_hash_undefweak
|| ((h->ref_regular || h->def_dynamic) && !h->def_regular)))
|| ((h->ref_regular || h->def_dynamic)
&& !h->def_regular
&& h->root.type != bfd_link_hash_common)))
{
bfd_boolean was_dynamic = h->ref_dynamic || h->def_dynamic;
h->verinfo.verdef = NULL;
h->root.type = bfd_link_hash_defined;
h->root.u.def.section = sec;
h->root.u.def.value = 0;