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| author |   Cody P Schafer <cody@linux.vnet.ibm.com> | 2012-08-10 15:22:51 -0700 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-08-13 12:56:45 -0300 |
| commit | 52f9ddba516214a59fdd8eb155b2583ab314dc31 (patch) | |
| tree | 349c99f8da86809fd778f33e01465b85299d8dd0 /tools/perf/util/symbol-elf.c | |
| parent | perf symbols: Remove unused function map__objdump_2ip (diff) | |
| download | wireguard-linux-52f9ddba516214a59fdd8eb155b2583ab314dc31.tar.xz wireguard-linux-52f9ddba516214a59fdd8eb155b2583ab314dc31.zip | |
perf symbols: Don't try to synthesize plt without dynstr
If .dynsym exists but .dynstr is empty (NO_BITS or size==0), a segfault
occurs. Avoid this by checking that .dynstr is not empty.
Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: David Hansen <dave@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Matt Hellsley <matthltc@us.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1344637382-22789-6-git-send-email-cody@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/symbol-elf.c')
| -rw-r--r-- | tools/perf/util/symbol-elf.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index e0376094fa8b..a2e994e2605f 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -232,6 +232,9 @@ int dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map, if (symstrs == NULL) goto out_elf_end; + if (symstrs->d_size == 0) + goto out_elf_end; + nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; plt_offset = shdr_plt.sh_offset; |