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-rwxr-xr-xscripts/syscalltbl.sh78
1 files changed, 78 insertions, 0 deletions
diff --git a/scripts/syscalltbl.sh b/scripts/syscalltbl.sh
new file mode 100755
index 0000000000..6abe143889
--- /dev/null
+++ b/scripts/syscalltbl.sh
@@ -0,0 +1,78 @@
+#!/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" | {
+
+ while read nr abi name native compat ; do
+
+ if [ $nxt -gt $nr ]; then
+ echo "error: $infile: syscall table is not sorted or duplicates the same syscall number" >&2
+ exit 1
+ fi
+
+ 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"