linux-kernel - [PATCH] perf machine: Don't ignore

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Message-ID: <b3ee1994d95257cb7f2de037c5030ba7d1bed404.1736327613.git.christophe.leroy@csgroup.eu>
Date: Wed,  8 Jan 2025 10:15:24 +0100
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	Song Liu <songliubraving@...com>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>,
	linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org,
	linux-perf-users@...r.kernel.org
Subject: [PATCH] perf machine: Don't ignore _etext when not a text symbol

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.

Fixes: ed9adb2035b5 ("perf machine: Read also the end of the kernel")
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 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 27d5345d2b30..9be2f4479f52 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;
 
-- 
2.47.0