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authorMasahiro Yamada <masahiroy@kernel.org>2021-02-16 11:04:11 +0900
committerMasahiro Yamada <masahiroy@kernel.org>2021-02-22 08:22:03 +0900
commit9df526b03c01ad98ed64e46c5e15b65fe89e25f6 (patch)
tree80643acd7a5eb2b937ec56e623f8ec7c69b84748
parent29c5c3ac633161f4ae2f4bb5f278b3719391b20e (diff)
scripts: add generic syscalltbl.sh
Most of architectures generate syscall headers at the compile time in a similar way. The syscall table has the same format for all architectures. Each line has up to 5 fields; syscall number, ABI, syscall name, native entry point, and compat entry point. The syscall table is processed by syscalltbl.sh script into header files. Despite the same pattern, scripts are maintained per architecture, which results in code duplication and bad maintainability. As of v5.11-rc1, 12 architectures duplicate similar shell scripts: $ find arch -name syscalltbl.sh | sort arch/alpha/kernel/syscalls/syscalltbl.sh arch/arm/tools/syscalltbl.sh arch/ia64/kernel/syscalls/syscalltbl.sh arch/m68k/kernel/syscalls/syscalltbl.sh arch/microblaze/kernel/syscalls/syscalltbl.sh arch/mips/kernel/syscalls/syscalltbl.sh arch/parisc/kernel/syscalls/syscalltbl.sh arch/powerpc/kernel/syscalls/syscalltbl.sh arch/sh/kernel/syscalls/syscalltbl.sh arch/sparc/kernel/syscalls/syscalltbl.sh arch/x86/entry/syscalls/syscalltbl.sh arch/xtensa/kernel/syscalls/syscalltbl.sh My goal is to unify them into scripts/syscalltbl.sh. __SYSCALL_WITH_COMPAT should be defined as follows: 32-bit kernel: #define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native) 64-bit kernel: #define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, compat) Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
-rwxr-xr-xscripts/syscalltbl.sh73
1 files changed, 73 insertions, 0 deletions
diff --git a/scripts/syscalltbl.sh b/scripts/syscalltbl.sh
new file mode 100755
index 000000000000..aa6ab156301c
--- /dev/null
+++ b/scripts/syscalltbl.sh
@@ -0,0 +1,73 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Generate a syscall table header.
+#
+# Each line of the syscall table should have the following format:
+#
+# NR ABI NAME [NATIVE] [COMPAT]
+#
+# NR syscall number
+# ABI ABI name
+# NAME syscall name
+# NATIVE native entry point (optional)
+# COMPAT compat entry point (optional)
+
+set -e
+
+usage() {
+ echo >&2 "usage: $0 [--abis ABIS] INFILE OUTFILE" >&2
+ echo >&2
+ echo >&2 " INFILE input syscall table"
+ echo >&2 " OUTFILE output header file"
+ echo >&2
+ echo >&2 "options:"
+ echo >&2 " --abis ABIS ABI(s) to handle (By default, all lines are handled)"
+ exit 1
+}
+
+# default unless specified by options
+abis=
+
+while [ $# -gt 0 ]
+do
+ case $1 in
+ --abis)
+ abis=$(echo "($2)" | tr ',' '|')
+ shift 2;;
+ -*)
+ echo "$1: unknown option" >&2
+ usage;;
+ *)
+ break;;
+ esac
+done
+
+if [ $# -ne 2 ]; then
+ usage
+fi
+
+infile="$1"
+outfile="$2"
+
+nxt=0
+
+grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | sort -n | {
+
+ while read nr abi name native compat ; do
+
+ while [ $nxt -lt $nr ]; do
+ echo "__SYSCALL($nxt, sys_ni_syscall)"
+ nxt=$((nxt + 1))
+ done
+
+ if [ -n "$compat" ]; then
+ echo "__SYSCALL_WITH_COMPAT($nr, $native, $compat)"
+ elif [ -n "$native" ]; then
+ echo "__SYSCALL($nr, $native)"
+ else
+ echo "__SYSCALL($nr, sys_ni_syscall)"
+ fi
+ nxt=$((nr + 1))
+ done
+} > "$outfile"