From 0fb641f0a1e704e1f774574b183401e7a7b6f5a8 Mon Sep 17 00:00:00 2001 From: Ian Rogers Date: Tue, 18 Mar 2025 22:07:35 -0700 Subject: [PATCH] perf trace beauty: Add syscalltbl.sh generating all system call tables Rather than generating individual syscall header files generate a single trace/beauty/generated/syscalltbl.c. In a syscalltbls array have references to each architectures tables along with the corresponding e_machine. When the 32-bit or 64-bit table is ambiguous, match the perf binary's type. For ARM32 don't use the arm64 32-bit table which is smaller. EM_NONE is present for is no machine matches. Conditionally compile the tables, only having the appropriate 32 and 64-bit table. If ALL_SYSCALLTBL is defined all tables can be compiled. Add comment for noreturn column suggested by Arnd Bergmann: https://lore.kernel.org/lkml/d47c35dd-9c52-48e7-a00d-135572f11fbb@app.fastmail.com/ and added in commit 9142be9e6443 ("x86/syscall: Mark exit[_group] syscall handlers __noreturn"). Signed-off-by: Ian Rogers Reviewed-by: Howard Chu Reviewed-by: Charlie Jenkins Reviewed-by: Namhyung Kim Acked-by: Arnaldo Carvalho de Melo Link: https://lore.kernel.org/r/20250319050741.269828-9-irogers@google.com Signed-off-by: Namhyung Kim --- tools/perf/Makefile.perf | 9 + tools/perf/trace/beauty/syscalltbl.sh | 274 ++++++++++++++++++++++++++ 2 files changed, 283 insertions(+) create mode 100755 tools/perf/trace/beauty/syscalltbl.sh diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index d0b50ccc9d7b..f949ec72f3d2 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -559,6 +559,14 @@ beauty_ioctl_outdir := $(beauty_outdir)/ioctl # Create output directory if not already present $(shell [ -d '$(beauty_ioctl_outdir)' ] || mkdir -p '$(beauty_ioctl_outdir)') +syscall_array := $(beauty_outdir)/syscalltbl.c +syscall_tbl := $(srctree)/tools/perf/trace/beauty/syscalltbl.sh +syscall_tbl_data := $(srctree)/tools/scripts/syscall.tbl \ + $(wildcard $(srctree)/tools/perf/arch/*/entry/syscalls/syscall*.tbl) + +$(syscall_array): $(syscall_tbl) $(syscall_tbl_data) + $(Q)$(SHELL) '$(syscall_tbl)' $(srctree)/tools $@ + fs_at_flags_array := $(beauty_outdir)/fs_at_flags_array.c fs_at_flags_tbl := $(srctree)/tools/perf/trace/beauty/fs_at_flags.sh @@ -878,6 +886,7 @@ build-dir = $(or $(__build-dir),.) prepare: $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)common-cmds.h archheaders \ arm64-sysreg-defs \ + $(syscall_array) \ $(fs_at_flags_array) \ $(clone_flags_array) \ $(drm_ioctl_array) \ diff --git a/tools/perf/trace/beauty/syscalltbl.sh b/tools/perf/trace/beauty/syscalltbl.sh new file mode 100755 index 000000000000..1199618dc178 --- /dev/null +++ b/tools/perf/trace/beauty/syscalltbl.sh @@ -0,0 +1,274 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# +# Generate all syscall tables. +# +# Each line of the syscall table should have the following format: +# +# NR ABI NAME [NATIVE] [COMPAT [noreturn]] +# +# NR syscall number +# ABI ABI name +# NAME syscall name +# NATIVE native entry point (optional) +# COMPAT compat entry point (optional) +# noreturn system call doesn't return (optional) +set -e + +usage() { + cat >&2 < + + path to kernel tools directory + output header file +EOF + exit 1 +} + +if [ $# -ne 2 ]; then + usage +fi +tools_dir=$1 +outfile=$2 + +build_tables() { + infile="$1" + outfile="$2" + abis=$(echo "($3)" | tr ',' '|') + e_machine="$4" + + if [ ! -f "$infile" ] + then + echo "Missing file $infile" + exit 1 + fi + sorted_table=$(mktemp /tmp/syscalltbl.XXXXXX) + grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | sort -n > "$sorted_table" + + echo "static const char *const syscall_num_to_name_${e_machine}[] = {" >> "$outfile" + # the params are: nr abi name entry compat + # use _ for intentionally unused variables according to SC2034 + while read -r nr _ name _ _; do + echo " [$nr] = \"$name\"," >> "$outfile" + done < "$sorted_table" + echo "};" >> "$outfile" + + echo "static const uint16_t syscall_sorted_names_${e_machine}[] = {" >> "$outfile" + + # When sorting by name, add a suffix of 0s upto 20 characters so that + # system calls that differ with a numerical suffix don't sort before + # those without. This default behavior of sort differs from that of + # strcmp used at runtime. Use sed to strip the trailing 0s suffix + # afterwards. + grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | awk '{printf $3; for (i = length($3); i < 20; i++) { printf "0"; }; print " " $1}'| sort | sed 's/\([a-zA-Z1-9]\+\)0\+ \([0-9]\+\)/\1 \2/' > "$sorted_table" + while read -r name nr; do + echo " $nr, /* $name */" >> "$outfile" + done < "$sorted_table" + echo "};" >> "$outfile" + + rm -f "$sorted_table" +} + +rm -f "$outfile" +cat >> "$outfile" < +#include +#include +#include + +struct syscalltbl { + const char *const *num_to_name; + const uint16_t *sorted_names; + uint16_t e_machine; + uint16_t num_to_name_len; + uint16_t sorted_names_len; +}; + +#if defined(ALL_SYSCALLTBL) || defined(__alpha__) +EOF +build_tables "$tools_dir/perf/arch/alpha/entry/syscalls/syscall.tbl" "$outfile" common,64 EM_ALPHA +cat >> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" +build_tables "$tools_dir/perf/arch/parisc/entry/syscalls/syscall.tbl" "$outfile" common,64 EM_PARISC +cat >> "$outfile" <> "$outfile" <> "$outfile" +build_tables "$tools_dir/scripts/syscall.tbl" "$outfile" common,64,riscv,rlimit,memfd_secret EM_RISCV +cat >> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" +build_tables "$tools_dir/perf/arch/sparc/entry/syscalls/syscall.tbl" "$outfile" common,64 EM_SPARC +cat >> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" +build_tables "$tools_dir/scripts/syscall.tbl" "$outfile" common,64 EM_NONE +echo "#endif //__BITS_PER_LONG != 64" >> "$outfile" + +build_outer_table() { + e_machine=$1 + outfile="$2" + cat >> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" <> "$outfile" <