LXR linux/scripts/syscallnr.sh

   1#!/bin/sh
   2# SPDX-License-Identifier: GPL-2.0-only
   3#
   4# Generate a syscall number header.
   5#
   6# Each line of the syscall table should have the following format:
   7#
   8# NR ABI NAME [NATIVE] [COMPAT]
   9#
  10# NR       syscall number
  11# ABI      ABI name
  12# NAME     syscall name
  13# NATIVE   native entry point (optional)
  14# COMPAT   compat entry point (optional)
  15set -e
  16
  17usage() {
  18        echo >&2 "usage: $0 [--abis ABIS] [--prefix PREFIX] INFILE OUTFILE" >&2
  19        echo >&2
  20        echo >&2 "  INFILE    input syscall table"
  21        echo >&2 "  OUTFILE   output header file"
  22        echo >&2
  23        echo >&2 "options:"
  24        echo >&2 "  --abis ABIS        ABI(s) to handle (By default, all lines are handled)"
  25        echo >&2 "  --prefix PREFIX    The prefix to the macro like __NR_<PREFIX><NAME>"
  26        exit 1
  27}
  28
  29# default unless specified by options
  30abis=
  31prefix=
  32
  33while [ $# -gt 0 ]
  34do
  35        case $1 in
  36        --abis)
  37                abis=$(echo "($2)" | tr ',' '|')
  38                shift 2;;
  39        --prefix)
  40                prefix=$2
  41                shift 2;;
  42        -*)
  43                echo "$1: unknown option" >&2
  44                usage;;
  45        *)
  46                break;;
  47        esac
  48done
  49
  50if [ $# -ne 2 ]; then
  51        usage
  52fi
  53
  54infile="$1"
  55outfile="$2"
  56
  57guard=_ASM_$(basename "$outfile" |
  58        sed -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
  59        -e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g')
  60
  61grep -E "^[0-9A-Fa-fXx]+[[:space:]]+$abis" "$infile" | sort -n | {
  62        echo "#ifndef $guard"
  63        echo "#define $guard"
  64        echo
  65
  66        max=0
  67        while read nr abi name native compat ; do
  68                max=$nr
  69        done
  70
  71        echo "#define __NR_${prefix}syscalls $(($max + 1))"
  72        echo
  73        echo "#endif /* $guard */"
  74} > "$outfile"
  75