linux-kernel - [PATCH 1/2] perf arm64: Handle __NR3264

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Message-Id: <1684837327-18203-2-git-send-email-yangtiezhu@loongson.cn>
Date:   Tue, 23 May 2023 18:22:06 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>
Cc:     Hans-Peter Nilsson <hp@...s.com>, Leo Yan <leo.yan@...aro.org>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        loongarch@...ts.linux.dev, loongson-kernel@...ts.loongnix.cn
Subject: [PATCH 1/2] perf arm64: Handle __NR3264_ prefixed syscall number

After commit 9854e7ad35fe ("perf arm64: Simplify mksyscalltbl"),
in the generated syscall table file syscalls.c, there exist some
__NR3264_ prefixed syscall numbers such as [__NR3264_ftruncate],
it looks like not so good, just do some small filter operations
to handle __NR3264_ prefixed syscall number as a digital number.

Without this patch:

  [__NR3264_ftruncate] = "ftruncate",

With this patch:

  [46] = "ftruncate",

Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 tools/perf/arch/arm64/entry/syscalls/mksyscalltbl | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl b/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
index 22cdf91..59ab7939 100755
--- a/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
+++ b/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
@@ -39,7 +39,8 @@ create_table()
 	echo "};"
 }
 
-$gcc -E -dM -x c -I $incpath/include/uapi $input \
-	|sed -ne 's/^#define __NR_//p' \
-	|sort -t' ' -k2 -n	       \
+$gcc -E -dM -x c -I $incpath/include/uapi $input		\
+	|awk '{if ($2~"__NR" && $3 !~"__NR3264_") {print}}'	\
+	|sed -ne 's/^#define __NR_//p;s/^#define __NR3264_//p'	\
+	|sort -t' ' -k2 -n					\
 	|create_table
-- 
2.1.0