6.12-stable review patch. If anyone has any objections, please let me know.
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From: Christophe Leroy christophe.leroy@csgroup.eu
[ 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@csgroup.eu Cc: Adrian Hunter adrian.hunter@intel.com Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Ian Rogers irogers@google.com Cc: Ingo Molnar mingo@redhat.com Cc: Jiri Olsa jolsa@kernel.org Cc: Kan Liang kan.liang@linux.intel.com Cc: linuxppc-dev@lists.ozlabs.org Cc: Mark Rutland mark.rutland@arm.com Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Cc: Song Liu songliubraving@fb.com Link: https://lore.kernel.org/r/b3ee1994d95257cb7f2de037c5030ba7d1bed404.173632761... Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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;