1#!/usr/bin/env perl
2# Copyright 2009 The Go Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style
4# license that can be found in the LICENSE file.
5
6use strict;
7
8my $command = "mksysnum_linux.pl ". join(' ', @ARGV);
9
10print <<EOF;
11// $command
12// Code generated by the command above; DO NOT EDIT.
13
14package syscall
15
16const(
17EOF
18
19my $offset = 0;
20
21sub fmt {
22	my ($name, $num) = @_;
23	if($num > 999){
24		# ignore deprecated syscalls that are no longer implemented
25		# https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/include/uapi/asm-generic/unistd.h?id=refs/heads/master#n716
26		return;
27	}
28	$name =~ y/a-z/A-Z/;
29	$num = $num + $offset;
30	print "	SYS_$name = $num;\n";
31}
32
33my $prev;
34open(GCC, "gcc -E -dD $ARGV[0] |") || die "can't run gcc";
35while(<GCC>){
36	if(/^#define __NR_Linux\s+([0-9]+)/){
37		# mips/mips64: extract offset
38		$offset = $1;
39	}
40	elsif(/^#define __NR_syscalls\s+/) {
41		# ignore redefinitions of __NR_syscalls
42	}
43	elsif(/^#define __NR_(\w+)\s+([0-9]+)/){
44		$prev = $2;
45		fmt($1, $2);
46	}
47	elsif(/^#define __NR3264_(\w+)\s+([0-9]+)/){
48		$prev = $2;
49		fmt($1, $2);
50	}
51	elsif(/^#define __NR_(\w+)\s+\(\w+\+\s*([0-9]+)\)/){
52		fmt($1, $prev+$2)
53	}
54	elsif(/^#define __NR_(\w+)\s+\(__NR_Linux \+ ([0-9]+)/){
55		fmt($1, $2);
56	}
57}
58
59print <<EOF;
60)
61EOF
62