aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorCody P Schafer <[email protected]>2012-08-10 15:22:51 -0700
committerArnaldo Carvalho de Melo <[email protected]>2012-08-13 12:56:45 -0300
commit52f9ddba516214a59fdd8eb155b2583ab314dc31 (patch)
tree349c99f8da86809fd778f33e01465b85299d8dd0
parent0f75a710dfd8fd5cd9e558e3f26c474c8fa63e3c (diff)
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 <[email protected]> Cc: David Hansen <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Matt Hellsley <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Sukadev Bhattiprolu <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
-rw-r--r--tools/perf/util/symbol-elf.c3
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;