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| author | H.J. Lu <hjl.tools@gmail.com> | 2016-03-04 06:37:34 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2016-03-04 06:37:54 -0800 |
| commit | 07492f668d2173da7a2bda3707ff0985e0f460b6 (patch) | |
| tree | 5495148ee6fc8e585e00cca748ac0351995bf8d4 /bfd | |
| parent | 9411fd44aa4adfb0caeebd9e4355a3441d9bc104 (diff) | |
| download | gdb-07492f668d2173da7a2bda3707ff0985e0f460b6.zip gdb-07492f668d2173da7a2bda3707ff0985e0f460b6.tar.gz gdb-07492f668d2173da7a2bda3707ff0985e0f460b6.tar.bz2 | |
Treat common symbol in executable as definition
Common symbol in executable is a definition, which overrides definition
from shared objects. When linker sees a new definition from a shared
object, the new dynamic definition should be overridden by the previous
common symbol in executable.
bfd/
PR ld/19579
* elflink.c (_bfd_elf_merge_symbol): Treat common symbol in
executable as definition if the new definition comes from a
shared library.
ld/
PR ld/19579
* testsuite/ld-elf/pr19579a.c: New file.
* testsuite/ld-elf/pr19579b.c: Likewise.
* testsuite/ld-elf/shared.exp: Run PR ld/19579 test.
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/ChangeLog | 7 | ||||
| -rw-r--r-- | bfd/elflink.c | 5 |
2 files changed, 11 insertions, 1 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index b2cc5b8..5f9f99d 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,10 @@ +2016-03-04 H.J. Lu <hongjiu.lu@intel.com> + + PR ld/19579 + * elflink.c (_bfd_elf_merge_symbol): Treat common symbol in + executable as definition if the new definition comes from a + shared library. + 2016-03-02 Alan Modra <amodra@gmail.com> * Makefile.in: Regenerate. diff --git a/bfd/elflink.c b/bfd/elflink.c index 0e3abff..39157bf 100644 --- a/bfd/elflink.c +++ b/bfd/elflink.c @@ -1172,9 +1172,12 @@ _bfd_elf_merge_symbol (bfd *abfd, newdef = !bfd_is_und_section (sec) && !bfd_is_com_section (sec); + /* The old common symbol in executable is a definition if the new + definition comes from a shared library. */ olddef = (h->root.type != bfd_link_hash_undefined && h->root.type != bfd_link_hash_undefweak - && h->root.type != bfd_link_hash_common); + && (h->root.type != bfd_link_hash_common + || (!olddyn && newdyn && bfd_link_executable (info)))); /* NEWFUNC and OLDFUNC indicate whether the new or old symbol, respectively, appear to be a function. */ |