6.13-stable review patch. If anyone has any objections, please let me know.
------------------
From: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
[ Upstream commit 7a93786c306296f15e728b1dbd949a319e4e3d19 ]
Depending on how vmlinux.lds is written, _etext might be the very first
data symbol instead of the very last text symbol.
Don't require it to be a text symbol, accept any symbol type.
Comitter notes:
See the first Link for further discussion, but it all boils down to
this:
---
# grep -e _stext -e _etext -e _edata /proc/kallsyms
c0000000 T _stext
c08b8000 D _etext
So there is no _edata and _etext is not text
$ ppc-linux-objdump -x vmlinux | grep -e _stext -e _etext -e _edata
c0000000 g .head.text 00000000 _stext
c08b8000 g .rodata 00000000 _etext
c1378000 g .sbss 00000000 _edata
---
Fixes: ed9adb2035b5be58 ("perf machine: Read also the end of the kernel")
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Song Liu <songliubraving@xxxxxx>
Link: https://lore.kernel.org/r/b3ee1994d95257cb7f2de037c5030ba7d1bed404.1736327613.git.christophe.leroy@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
tools/perf/util/machine.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 27d5345d2b307..9be2f4479f525 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1003,7 +1003,7 @@ static int machine__get_running_kernel_start(struct machine *machine,
err = kallsyms__get_symbol_start(filename, "_edata", &addr);
if (err)
- err = kallsyms__get_function_start(filename, "_etext", &addr);
+ err = kallsyms__get_symbol_start(filename, "_etext", &addr);
if (!err)
*end = addr;
--
2.39.5
