[tip:perf/core] perf symbols: Only un-prelink non-zero symbols

[tip-bot for Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>]

Commit-ID:  8db24c70ab43a4dd38c39b0b0cb4d4874257de55
Gitweb:     http://git.kernel.org/tip/8db24c70ab43a4dd38c39b0b0cb4d4874257de55
Author:     Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>
AuthorDate: Fri, 10 Aug 2012 15:22:49 -0700
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 13 Aug 2012 12:54:06 -0300

perf symbols: Only un-prelink non-zero symbols

Prelink only adjusts the addresses of non-zero symbols. Do the same when we
reverse the adjustments.

Signed-off-by: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>
Cc: David Hansen <dave@xxxxxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Matt Hellsley <matthltc@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1344637382-22789-4-git-send-email-cody@xxxxxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/symbol-elf.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 9ca89f8..e037609 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -717,7 +717,7 @@ int dso__load_sym(struct dso *dso, struct map *map, const char *name, int fd,
 			goto new_symbol;
 		}
 
-		if (curr_dso->adjust_symbols) {
+		if (curr_dso->adjust_symbols && sym.st_value) {
 			pr_debug4("%s: adjusting symbol: st_value: %#" PRIx64 " "
 				  "sh_addr: %#" PRIx64 " sh_offset: %#" PRIx64 "\n", __func__,
 				  (u64)sym.st_value, (u64)shdr.sh_addr,
--
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