From: Ian Rogers <irogers@google.com>
Date: Mon, 29 Sep 2025 19:07:51 +0000 (-0700)
Subject: perf map: Constify objdump offset/address conversion APIs
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=c0b8a55a1180274247f6081260cd854c2a309379;p=users%2Fhch%2Fmisc.git

perf map: Constify objdump offset/address conversion APIs

Make the map argument const as the conversion act won't modify the map
and this allows other callers to use a const struct map.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexandre Ghiti <alexghiti@rivosinc.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.ibm.com>
Cc: Bill Wendling <morbo@google.com>
Cc: Charlie Jenkins <charlie@rivosinc.com>
Cc: Collin Funk <collin.funk1@gmail.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Dr. David Alan Gilbert <linux@treblig.org>
Cc: Eric Biggers <ebiggers@kernel.org>
Cc: Haibo Xu <haibo1.xu@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Justin Stitt <justinstitt@google.com>
Cc: Li Huafei <lihuafei1@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index b46c68c24d1c..41cdddc987ee 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -513,6 +513,8 @@ void srccode_state_free(struct srccode_state *state)
 	state->line = 0;
 }
 
+static const struct kmap *__map__const_kmap(const struct map *map);
+
 /**
  * map__rip_2objdump - convert symbol start address to objdump address.
  * @map: memory map
@@ -524,9 +526,9 @@ void srccode_state_free(struct srccode_state *state)
  *
  * Return: Address suitable for passing to "objdump --start-address="
  */
-u64 map__rip_2objdump(struct map *map, u64 rip)
+u64 map__rip_2objdump(const struct map *map, u64 rip)
 {
-	struct kmap *kmap = __map__kmap(map);
+	const struct kmap *kmap = __map__const_kmap(map);
 	const struct dso *dso = map__dso(map);
 
 	/*
@@ -569,7 +571,7 @@ u64 map__rip_2objdump(struct map *map, u64 rip)
  *
  * Return: Memory address.
  */
-u64 map__objdump_2mem(struct map *map, u64 ip)
+u64 map__objdump_2mem(const struct map *map, u64 ip)
 {
 	const struct dso *dso = map__dso(map);
 
@@ -586,7 +588,7 @@ u64 map__objdump_2mem(struct map *map, u64 ip)
 }
 
 /* convert objdump address to relative address.  (To be removed) */
-u64 map__objdump_2rip(struct map *map, u64 ip)
+u64 map__objdump_2rip(const struct map *map, u64 ip)
 {
 	const struct dso *dso = map__dso(map);
 
@@ -618,6 +620,15 @@ struct kmap *__map__kmap(struct map *map)
 	return (struct kmap *)(&RC_CHK_ACCESS(map)[1]);
 }
 
+static const struct kmap *__map__const_kmap(const struct map *map)
+{
+	const struct dso *dso = map__dso(map);
+
+	if (!dso || !dso__kernel(dso))
+		return NULL;
+	return (struct kmap *)(&RC_CHK_ACCESS(map)[1]);
+}
+
 struct kmap *map__kmap(struct map *map)
 {
 	struct kmap *kmap = __map__kmap(map);
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index 9cadf533a561..979b3e11b9bc 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -133,13 +133,13 @@ static inline u64 map__unmap_ip(const struct map *map, u64 ip_or_rip)
 }
 
 /* rip/ip <-> addr suitable for passing to `objdump --start-address=` */
-u64 map__rip_2objdump(struct map *map, u64 rip);
+u64 map__rip_2objdump(const struct map *map, u64 rip);
 
 /* objdump address -> memory address */
-u64 map__objdump_2mem(struct map *map, u64 ip);
+u64 map__objdump_2mem(const struct map *map, u64 ip);
 
 /* objdump address -> rip */
-u64 map__objdump_2rip(struct map *map, u64 ip);
+u64 map__objdump_2rip(const struct map *map, u64 ip);
 
 struct symbol;
 struct thread;