#!/usr/bin/env perl

# Copyright 2009 The Go Authors. All rights reserved.

# Use of this source code is governed by a BSD-style

# license that can be found in the LICENSE file.

use strict;

my $command = "mksysnum_linux.pl ". join(' ', @ARGV);

print <<EOF;

// $command

// Code generated by the command above; DO NOT EDIT.

package syscall

const(

EOF

my $offset = 0;

sub fmt {

my ($name, $num) = @_;

if($num > 999){

# ignore deprecated syscalls that are no longer implemented

# https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/include/uapi/asm-generic/unistd.h?id=refs/heads/master#n716

return;

}

$name =~ y/a-z/A-Z/;

$num = $num + $offset;

print " SYS_$name = $num;\n";

}

my $prev;

open(GCC, "gcc -E -dD $ARGV[0] |") || die "can't run gcc";

while(<GCC>){

if(/^#define __NR_Linux\s+([0-9]+)/){

# mips/mips64: extract offset

$offset = $1;

}

elsif(/^#define __NR_syscalls\s+/) {

# ignore redefinitions of __NR_syscalls

}

elsif(/^#define __NR_(\w+)\s+([0-9]+)/){

$prev = $2;

fmt($1, $2);

}

elsif(/^#define __NR3264_(\w+)\s+([0-9]+)/){

$prev = $2;

fmt($1, $2);

}

elsif(/^#define __NR_(\w+)\s+\(\w+\+\s*([0-9]+)\)/){

fmt($1, $prev+$2)

}

elsif(/^#define __NR_(\w+)\s+\(__NR_Linux \+ ([0-9]+)/){

fmt($1, $2);

}

}

print <<EOF;

)

EOF