99 lines
1.9 KiB
Bash
99 lines
1.9 KiB
Bash
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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0-only
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#
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# Generate a syscall number header.
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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]
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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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set -e
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usage() {
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echo >&2 "usage: $0 [--abis ABIS] [--emit-nr] [--offset OFFSET] [--prefix PREFIX] INFILE OUTFILE" >&2
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echo >&2
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echo >&2 " INFILE input syscall table"
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echo >&2 " OUTFILE output header file"
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echo >&2
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echo >&2 "options:"
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echo >&2 " --abis ABIS ABI(s) to handle (By default, all lines are handled)"
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echo >&2 " --emit-nr Emit the macro of the number of syscalls (__NR_syscalls)"
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echo >&2 " --offset OFFSET The offset of syscall numbers"
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echo >&2 " --prefix PREFIX The prefix to the macro like __NR_<PREFIX><NAME>"
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exit 1
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}
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# default unless specified by options
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abis=
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emit_nr=
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offset=
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prefix=
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while [ $# -gt 0 ]
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do
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case $1 in
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--abis)
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abis=$(echo "($2)" | tr ',' '|')
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shift 2;;
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--emit-nr)
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emit_nr=1
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shift 1;;
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--offset)
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offset=$2
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shift 2;;
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--prefix)
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prefix=$2
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shift 2;;
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-*)
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echo "$1: unknown option" >&2
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usage;;
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*)
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break;;
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esac
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done
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if [ $# -ne 2 ]; then
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usage
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fi
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infile="$1"
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outfile="$2"
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guard=_UAPI_ASM_$(basename "$outfile" |
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sed -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
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-e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g')
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grep -E "^[0-9A-Fa-fXx]+[[:space:]]+$abis" "$infile" | {
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echo "#ifndef $guard"
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echo "#define $guard"
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echo
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max=0
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while read nr abi name native compat ; do
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max=$nr
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if [ -n "$offset" ]; then
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nr="($offset + $nr)"
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fi
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echo "#define __NR_$prefix$name $nr"
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done
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if [ -n "$emit_nr" ]; then
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echo
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echo "#ifdef __KERNEL__"
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echo "#define __NR_${prefix}syscalls $(($max + 1))"
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echo "#endif"
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fi
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echo
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echo "#endif /* $guard */"
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} > "$outfile"
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