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 noreturn; 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=$((nxt + 1))
67 done
68
69 if [ "$compat" = "-" ]; then
70 unset compat
71 fi
72
73 if [ -n "$noreturn" ]; then
74 if [ "$noreturn" != "noreturn" ]; then
75 echo "error: $infile: invalid string \"$noreturn\" in 'noreturn' column"
76 exit 1
77 fi
78 if [ -n "$compat" ]; then
79 echo "__SYSCALL_COMPAT_NORETURN($nr, $native, $compat)"
80 else
81 echo "__SYSCALL_NORETURN($nr, $native)"
82 fi
83 elif [ -n "$compat" ]; then
84 echo "__SYSCALL_WITH_COMPAT($nr, $native, $compat)"
85 elif [ -n "$native" ]; then
86 echo "__SYSCALL($nr, $native)"
87 else
88 echo "__SYSCALL($nr, sys_ni_syscall)"
89 fi
90 nxt=$((nr + 1))
91 done
92 } > "$outfile"
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