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From: Steve Clevenger <scclevenger@os.amperecomputing.com>
To: james.clark@linaro.org, mike.leach@linaro.org
Cc: suzuki.poulose@arm.com, leo.yan@arm.com,
	ilkka@os.amperecomputing.com, coresight@lists.linaro.org,
	linux-perf-users@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH V3 2/4] Force MAPPING_TYPE__IDENTIY for PIE
Date: Tue, 27 Aug 2024 19:50:15 -0600	[thread overview]
Message-ID: <85c2c76685f9aa55ada3178af8cd109f3dc7b0b0.1724808513.git.scclevenger@os.amperecomputing.com> (raw)
In-Reply-To: <cover.1724808513.git.scclevenger@os.amperecomputing.com>

Use dso__is_pie() to check whether the DSO file is a Position
Independent Executable (PIE). If PIE, change the MAPPING_TYPE to
MAPPING_TYPE__IDENTITY so a zero map pgoff (text offset) is passed
into the script.

Signed-off-by: Steve Clevenger <scclevenger@os.amperecomputing.com>
---
 tools/perf/util/map.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index e781c8d56a9a..c846faec177b 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -173,8 +173,8 @@ struct map *map__new(struct machine *machine, u64 start, u64 len,
 		assert(!dso__kernel(dso));
 		map__init(result, start, start + len, pgoff, dso, prot, flags);
 
-		if (anon || no_dso) {
-			map->mapping_type = MAPPING_TYPE__IDENTITY;
+		if (anon || no_dso || dso__is_pie(dso)) {
+			map__set_mapping_type(map, MAPPING_TYPE__IDENTITY);
 
 			/*
 			 * Set memory without DSO as loaded. All map__find_*
-- 
2.25.1


  parent reply	other threads:[~2024-08-28  1:50 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-08-28  1:50 [PATCH V3 0/4] arm-cs-trace-disasm.py/perf must accommodate non-zero DSO text offset Steve Clevenger
2024-08-28  1:50 ` [PATCH V3 4/4] Adjust objdump start/end range per map pgoff parameter Steve Clevenger
2024-08-28  1:50 ` [PATCH V3 3/4] Add map pgoff to python dictionary based on MAPPING_TYPE Steve Clevenger
2024-08-28  5:09   ` Steve Clevenger
2024-08-28  1:50 ` Steve Clevenger [this message]
2024-08-28  1:50 ` [PATCH V3 1/4] Add dso__is_pie call to identify ELF PIE Steve Clevenger

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