Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 <irogers@google.com>
Reviewed-by: Howard Chu <howardchu95@gmail.com>
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Link: https://lore.kernel.org/r/20250319050741.269828-9-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
authored by
Ian Rogers
and committed by
Namhyung Kim
0fb641f0
70351029
+283
+9
tools/perf/Makefile.perf
+9
tools/perf/Makefile.perf
···
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# Create output directory if not already present
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$(shell [ -d '$(beauty_ioctl_outdir)' ] || mkdir -p '$(beauty_ioctl_outdir)')
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syscall_array := $(beauty_outdir)/syscalltbl.c
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syscall_tbl := $(srctree)/tools/perf/trace/beauty/syscalltbl.sh
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syscall_tbl_data := $(srctree)/tools/scripts/syscall.tbl \
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$(wildcard $(srctree)/tools/perf/arch/*/entry/syscalls/syscall*.tbl)
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$(syscall_array): $(syscall_tbl) $(syscall_tbl_data)
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$(Q)$(SHELL) '$(syscall_tbl)' $(srctree)/tools $@
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fs_at_flags_array := $(beauty_outdir)/fs_at_flags_array.c
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fs_at_flags_tbl := $(srctree)/tools/perf/trace/beauty/fs_at_flags.sh
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···
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prepare: $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)common-cmds.h archheaders \
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arm64-sysreg-defs \
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$(syscall_array) \
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$(fs_at_flags_array) \
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$(clone_flags_array) \
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$(drm_ioctl_array) \
+274
tools/perf/trace/beauty/syscalltbl.sh
+274
tools/perf/trace/beauty/syscalltbl.sh
···
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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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#
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# Generate all syscall tables.
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#
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# Each line of the syscall table should have the following format:
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#
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# NR ABI NAME [NATIVE] [COMPAT [noreturn]]
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#
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# NR syscall number
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# ABI ABI name
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# NAME syscall name
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# NATIVE native entry point (optional)
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# COMPAT compat entry point (optional)
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# noreturn system call doesn't return (optional)
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set -e
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usage() {
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cat >&2 <<EOF
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usage: $0 <TOOLS DIRECTORY> <OUTFILE>
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<TOOLS DIRECTORY> path to kernel tools directory
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<OUTFILE> output header file
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EOF
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exit 1
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}
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if [ $# -ne 2 ]; then
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usage
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fi
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tools_dir=$1
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outfile=$2
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build_tables() {
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infile="$1"
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outfile="$2"
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abis=$(echo "($3)" | tr ',' '|')
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e_machine="$4"
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if [ ! -f "$infile" ]
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then
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echo "Missing file $infile"
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exit 1
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fi
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sorted_table=$(mktemp /tmp/syscalltbl.XXXXXX)
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grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | sort -n > "$sorted_table"
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echo "static const char *const syscall_num_to_name_${e_machine}[] = {" >> "$outfile"
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# the params are: nr abi name entry compat
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# use _ for intentionally unused variables according to SC2034
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while read -r nr _ name _ _; do
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echo " [$nr] = \"$name\"," >> "$outfile"
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done < "$sorted_table"
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echo "};" >> "$outfile"
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echo "static const uint16_t syscall_sorted_names_${e_machine}[] = {" >> "$outfile"
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# When sorting by name, add a suffix of 0s upto 20 characters so that
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# system calls that differ with a numerical suffix don't sort before
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# those without. This default behavior of sort differs from that of
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# strcmp used at runtime. Use sed to strip the trailing 0s suffix
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# afterwards.
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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"
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while read -r name nr; do
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echo " $nr, /* $name */" >> "$outfile"
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done < "$sorted_table"
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echo "};" >> "$outfile"
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rm -f "$sorted_table"
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}
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rm -f "$outfile"
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cat >> "$outfile" <<EOF
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#include <elf.h>
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#include <stdint.h>
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#include <asm/bitsperlong.h>
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#include <linux/kernel.h>
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struct syscalltbl {
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const char *const *num_to_name;
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const uint16_t *sorted_names;
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uint16_t e_machine;
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uint16_t num_to_name_len;
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uint16_t sorted_names_len;
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};
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#if defined(ALL_SYSCALLTBL) || defined(__alpha__)
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EOF
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build_tables "$tools_dir/perf/arch/alpha/entry/syscalls/syscall.tbl" "$outfile" common,64 EM_ALPHA
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__alpha__)
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#if defined(ALL_SYSCALLTBL) || defined(__arm__) || defined(__aarch64__)
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EOF
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build_tables "$tools_dir/perf/arch/arm/entry/syscalls/syscall.tbl" "$outfile" common,32,oabi EM_ARM
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build_tables "$tools_dir/perf/arch/arm64/entry/syscalls/syscall_64.tbl" "$outfile" common,64,renameat,rlimit,memfd_secret EM_AARCH64
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__arm__) || defined(__aarch64__)
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#if defined(ALL_SYSCALLTBL) || defined(__csky__)
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EOF
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build_tables "$tools_dir/scripts/syscall.tbl" "$outfile" common,32,csky,time32,stat64,rlimit EM_CSKY
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__csky__)
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#if defined(ALL_SYSCALLTBL) || defined(__mips__)
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EOF
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build_tables "$tools_dir/perf/arch/mips/entry/syscalls/syscall_n64.tbl" "$outfile" common,64,n64 EM_MIPS
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__mips__)
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#if defined(ALL_SYSCALLTBL) || defined(__hppa__)
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#if __BITS_PER_LONG != 64
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EOF
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build_tables "$tools_dir/perf/arch/parisc/entry/syscalls/syscall.tbl" "$outfile" common,32 EM_PARISC
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echo "#else" >> "$outfile"
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build_tables "$tools_dir/perf/arch/parisc/entry/syscalls/syscall.tbl" "$outfile" common,64 EM_PARISC
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cat >> "$outfile" <<EOF
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#endif //__BITS_PER_LONG != 64
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#endif // defined(ALL_SYSCALLTBL) || defined(__hppa__)
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#if defined(ALL_SYSCALLTBL) || defined(__powerpc__) || defined(__powerpc64__)
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EOF
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build_tables "$tools_dir/perf/arch/powerpc/entry/syscalls/syscall.tbl" "$outfile" common,32,nospu EM_PPC
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build_tables "$tools_dir/perf/arch/powerpc/entry/syscalls/syscall.tbl" "$outfile" common,64,nospu EM_PPC64
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__powerpc__) || defined(__powerpc64__)
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#if defined(ALL_SYSCALLTBL) || defined(__riscv)
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#if __BITS_PER_LONG != 64
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EOF
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build_tables "$tools_dir/scripts/syscall.tbl" "$outfile" common,32,riscv,memfd_secret EM_RISCV
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echo "#else" >> "$outfile"
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build_tables "$tools_dir/scripts/syscall.tbl" "$outfile" common,64,riscv,rlimit,memfd_secret EM_RISCV
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cat >> "$outfile" <<EOF
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#endif //__BITS_PER_LONG != 64
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#endif // defined(ALL_SYSCALLTBL) || defined(__riscv)
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#if defined(ALL_SYSCALLTBL) || defined(__s390x__)
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EOF
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build_tables "$tools_dir/perf/arch/s390/entry/syscalls/syscall.tbl" "$outfile" common,64,renameat,rlimit,memfd_secret EM_S390
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__s390x__)
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#if defined(ALL_SYSCALLTBL) || defined(__sh__)
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EOF
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build_tables "$tools_dir/perf/arch/sh/entry/syscalls/syscall.tbl" "$outfile" common,32 EM_SH
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__sh__)
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#if defined(ALL_SYSCALLTBL) || defined(__sparc64__) || defined(__sparc__)
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#if __BITS_PER_LONG != 64
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EOF
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build_tables "$tools_dir/perf/arch/sparc/entry/syscalls/syscall.tbl" "$outfile" common,32 EM_SPARC
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echo "#else" >> "$outfile"
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build_tables "$tools_dir/perf/arch/sparc/entry/syscalls/syscall.tbl" "$outfile" common,64 EM_SPARC
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cat >> "$outfile" <<EOF
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#endif //__BITS_PER_LONG != 64
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#endif // defined(ALL_SYSCALLTBL) || defined(__sparc64__) || defined(__sparc__)
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#if defined(ALL_SYSCALLTBL) || defined(__i386__) || defined(__x86_64__)
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EOF
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build_tables "$tools_dir/perf/arch/x86/entry/syscalls/syscall_32.tbl" "$outfile" common,32,i386 EM_386
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build_tables "$tools_dir/perf/arch/x86/entry/syscalls/syscall_64.tbl" "$outfile" common,64 EM_X86_64
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__i386__) || defined(__x86_64__)
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#if defined(ALL_SYSCALLTBL) || defined(__xtensa__)
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EOF
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build_tables "$tools_dir/perf/arch/xtensa/entry/syscalls/syscall.tbl" "$outfile" common,32 EM_XTENSA
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__xtensa__)
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#if __BITS_PER_LONG != 64
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EOF
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build_tables "$tools_dir/scripts/syscall.tbl" "$outfile" common,32 EM_NONE
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echo "#else" >> "$outfile"
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build_tables "$tools_dir/scripts/syscall.tbl" "$outfile" common,64 EM_NONE
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echo "#endif //__BITS_PER_LONG != 64" >> "$outfile"
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build_outer_table() {
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e_machine=$1
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outfile="$2"
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cat >> "$outfile" <<EOF
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{
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.num_to_name = syscall_num_to_name_$e_machine,
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.sorted_names = syscall_sorted_names_$e_machine,
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.e_machine = $e_machine,
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.num_to_name_len = ARRAY_SIZE(syscall_num_to_name_$e_machine),
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.sorted_names_len = ARRAY_SIZE(syscall_sorted_names_$e_machine),
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},
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EOF
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}
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cat >> "$outfile" <<EOF
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static const struct syscalltbl syscalltbls[] = {
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#if defined(ALL_SYSCALLTBL) || defined(__alpha__)
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EOF
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build_outer_table EM_ALPHA "$outfile"
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__alpha__)
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#if defined(ALL_SYSCALLTBL) || defined(__arm__) || defined(__aarch64__)
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EOF
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build_outer_table EM_ARM "$outfile"
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build_outer_table EM_AARCH64 "$outfile"
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__arm__) || defined(__aarch64__)
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#if defined(ALL_SYSCALLTBL) || defined(__csky__)
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EOF
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build_outer_table EM_CSKY "$outfile"
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__csky__)
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#if defined(ALL_SYSCALLTBL) || defined(__mips__)
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EOF
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build_outer_table EM_MIPS "$outfile"
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__mips__)
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#if defined(ALL_SYSCALLTBL) || defined(__hppa__)
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EOF
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build_outer_table EM_PARISC "$outfile"
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__hppa__)
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#if defined(ALL_SYSCALLTBL) || defined(__powerpc__) || defined(__powerpc64__)
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EOF
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build_outer_table EM_PPC "$outfile"
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build_outer_table EM_PPC64 "$outfile"
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__powerpc__) || defined(__powerpc64__)
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#if defined(ALL_SYSCALLTBL) || defined(__riscv)
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EOF
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build_outer_table EM_RISCV "$outfile"
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__riscv)
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#if defined(ALL_SYSCALLTBL) || defined(__s390x__)
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EOF
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build_outer_table EM_S390 "$outfile"
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__s390x__)
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#if defined(ALL_SYSCALLTBL) || defined(__sh__)
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EOF
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build_outer_table EM_SH "$outfile"
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__sh__)
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#if defined(ALL_SYSCALLTBL) || defined(__sparc64__) || defined(__sparc__)
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EOF
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build_outer_table EM_SPARC "$outfile"
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__sparc64__) || defined(__sparc__)
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#if defined(ALL_SYSCALLTBL) || defined(__i386__) || defined(__x86_64__)
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EOF
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build_outer_table EM_386 "$outfile"
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build_outer_table EM_X86_64 "$outfile"
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__i386__) || defined(__x86_64__)
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#if defined(ALL_SYSCALLTBL) || defined(__xtensa__)
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EOF
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build_outer_table EM_XTENSA "$outfile"
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cat >> "$outfile" <<EOF
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#endif // defined(ALL_SYSCALLTBL) || defined(__xtensa__)
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EOF
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build_outer_table EM_NONE "$outfile"
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cat >> "$outfile" <<EOF
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};
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EOF