Merge tag 'perf-urgent-2021-09-19' of git://git.kernel.org/pub/scm/linux/kernel/git...
[platform/kernel/linux-starfive.git] / scripts / syscalltbl.sh
1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0-only
3 #
4 # Generate a syscall table 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)
15
16 set -e
17
18 usage() {
19         echo >&2 "usage: $0 [--abis ABIS] INFILE OUTFILE" >&2
20         echo >&2
21         echo >&2 "  INFILE    input syscall table"
22         echo >&2 "  OUTFILE   output header file"
23         echo >&2
24         echo >&2 "options:"
25         echo >&2 "  --abis ABIS        ABI(s) to handle (By default, all lines are handled)"
26         exit 1
27 }
28
29 # default unless specified by options
30 abis=
31
32 while [ $# -gt 0 ]
33 do
34         case $1 in
35         --abis)
36                 abis=$(echo "($2)" | tr ',' '|')
37                 shift 2;;
38         -*)
39                 echo "$1: unknown option" >&2
40                 usage;;
41         *)
42                 break;;
43         esac
44 done
45
46 if [ $# -ne 2 ]; then
47         usage
48 fi
49
50 infile="$1"
51 outfile="$2"
52
53 nxt=0
54
55 grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | {
56
57         while read nr abi name native compat ; do
58
59                 if [ $nxt -gt $nr ]; then
60                         echo "error: $infile: syscall table is not sorted or duplicates the same syscall number" >&2
61                         exit 1
62                 fi
63
64                 while [ $nxt -lt $nr ]; do
65                         echo "__SYSCALL($nxt, sys_ni_syscall)"
66                         nxt=$((nxt + 1))
67                 done
68
69                 if [ -n "$compat" ]; then
70                         echo "__SYSCALL_WITH_COMPAT($nr, $native, $compat)"
71                 elif [ -n "$native" ]; then
72                         echo "__SYSCALL($nr, $native)"
73                 else
74                         echo "__SYSCALL($nr, sys_ni_syscall)"
75                 fi
76                 nxt=$((nr + 1))
77         done
78 } > "$outfile"