linux-kernel - [PATCH 04/14] perf map: Add map__objdump

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Date: Fri,  2 Feb 2024 14:04:49 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ian Rogers <irogers@...gle.com>
Cc: Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-perf-users@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Stephane Eranian <eranian@...gle.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	linux-toolchains@...r.kernel.org,
	linux-trace-devel@...r.kernel.org
Subject: [PATCH 04/14] perf map: Add map__objdump_2rip()

Sometimes we want to convert an address in objdump output to
map-relative address to match with a sample data.  Let's add
map__objdump_2rip() for that.

Cc: Adrian Hunter <adrian.hunter@...el.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/map.c | 20 ++++++++++++++++++++
 tools/perf/util/map.h |  3 +++
 2 files changed, 23 insertions(+)

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 54c67cb7ecef..66542864b7b5 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -594,6 +594,26 @@ u64 map__objdump_2mem(struct map *map, u64 ip)
 	return ip + map__reloc(map);
 }
 
+u64 map__objdump_2rip(struct map *map, u64 ip)
+{
+	const struct dso *dso = map__dso(map);
+
+	if (!dso->adjust_symbols)
+		return ip;
+
+	if (dso->rel)
+		return ip + map__pgoff(map);
+
+	/*
+	 * kernel modules also have DSO_TYPE_USER in dso->kernel,
+	 * but all kernel modules are ET_REL, so won't get here.
+	 */
+	if (dso->kernel == DSO_SPACE__USER)
+		return ip - dso->text_offset;
+
+	return map__map_ip(map, ip + map__reloc(map));
+}
+
 bool map__contains_symbol(const struct map *map, const struct symbol *sym)
 {
 	u64 ip = map__unmap_ip(map, sym->start);
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index 49756716cb13..65e2609fa1b1 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -132,6 +132,9 @@ u64 map__rip_2objdump(struct map *map, u64 rip);
 /* objdump address -> memory address */
 u64 map__objdump_2mem(struct map *map, u64 ip);
 
+/* objdump address -> rip */
+u64 map__objdump_2rip(struct map *map, u64 ip);
+
 struct symbol;
 struct thread;
 
-- 
2.43.0.594.gd9cf4e227d-goog