linux-kernel - [PATCH 2/2] perf LoongArch: Simplify mksyscalltbl

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Message-Id: <1684837327-18203-3-git-send-email-yangtiezhu@loongson.cn>
Date:   Tue, 23 May 2023 18:22:07 +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 2/2] perf LoongArch: Simplify mksyscalltbl

In order to print the numerical entries of the syscall table,
there is no need to call the host compiler to build and then
run a program, this can be done directly by the shell script.

This is similar with commit 9854e7ad35fe ("perf arm64: Simplify
mksyscalltbl").

Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 .../arch/loongarch/entry/syscalls/mksyscalltbl     | 32 ++++++----------------
 1 file changed, 8 insertions(+), 24 deletions(-)

diff --git a/tools/perf/arch/loongarch/entry/syscalls/mksyscalltbl b/tools/perf/arch/loongarch/entry/syscalls/mksyscalltbl
index c52156f..d7d97d5 100755
--- a/tools/perf/arch/loongarch/entry/syscalls/mksyscalltbl
+++ b/tools/perf/arch/loongarch/entry/syscalls/mksyscalltbl
@@ -22,40 +22,24 @@ create_table_from_c()
 {
 	local sc nr last_sc
 
-	create_table_exe=`mktemp ${TMPDIR:-/tmp}/create-table-XXXXXX`
-
-	{
-
-	cat <<-_EoHEADER
-		#include <stdio.h>
-		#include "$input"
-		int main(int argc, char *argv[])
-		{
-	_EoHEADER
-
 	while read sc nr; do
-		printf "%s\n" "	printf(\"\\t[%d] = \\\"$sc\\\",\\n\", $nr);"
-		last_sc=$nr
+		printf "%s\n" "	[$nr] = \"$sc\","
+		last_sc=$sc
 	done
 
-	printf "%s\n" "	printf(\"#define SYSCALLTBL_LOONGARCH_MAX_ID %d\\n\", $last_sc);"
-	printf "}\n"
-
-	} | $hostcc -I $incpath/include/uapi -o $create_table_exe -x c -
-
-	$create_table_exe
-
-	rm -f $create_table_exe
+	printf "%s\n" "#define SYSCALLTBL_LOONGARCH_MAX_ID __NR_$last_sc"
 }
 
 create_table()
 {
+	echo "#include \"$input\""
 	echo "static const char *syscalltbl_loongarch[] = {"
 	create_table_from_c
 	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