Ophestra
2c7b7ad845
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Signed-off-by: Ophestra <cat@gensokyo.uk>
90 lines
1.8 KiB
Perl
Executable File
90 lines
1.8 KiB
Perl
Executable File
#!/usr/bin/env perl
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# Copyright 2009 The Go Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file.
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use strict;
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use POSIX ();
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my $command = "mksysnum_linux.pl ". join(' ', @ARGV);
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my $uname_arch = (POSIX::uname)[4];
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my %syscall_cutoff_arch = (
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"x86_64" => 302,
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"aarch64" => 281,
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);
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print <<EOF;
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// $command
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// Code generated by the command above; DO NOT EDIT.
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package seccomp
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import . "syscall"
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var syscallNum = map[string]int{
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EOF
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my $offset = 0;
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my $state = -1;
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sub fmt {
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my ($name, $num) = @_;
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if($num > 999){
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# ignore deprecated syscalls that are no longer implemented
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# https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/include/uapi/asm-generic/unistd.h?id=refs/heads/master#n716
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return;
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}
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(my $name_upper = $name) =~ y/a-z/A-Z/;
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$num = $num + $offset;
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if($num > $syscall_cutoff_arch{$uname_arch}){ # not wired in Go standard library
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if($state < 0){
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print " \"$name\": SYS_$name_upper,\n";
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}
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else{
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print " SYS_$name_upper = $num;\n";
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}
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}
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elsif($state < 0){
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print " \"$name\": SYS_$name_upper,\n";
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}
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else{
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return;
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}
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}
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GENERATE:
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my $prev;
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open(GCC, "gcc -E -dD $ARGV[0] |") || die "can't run gcc";
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while(<GCC>){
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if(/^#define __NR_Linux\s+([0-9]+)/){
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# mips/mips64: extract offset
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$offset = $1;
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}
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elsif(/^#define __NR_syscalls\s+/) {
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# ignore redefinitions of __NR_syscalls
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}
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elsif(/^#define __NR_(\w+)\s+([0-9]+)/){
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$prev = $2;
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fmt($1, $2);
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}
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elsif(/^#define __NR3264_(\w+)\s+([0-9]+)/){
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$prev = $2;
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fmt($1, $2);
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}
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elsif(/^#define __NR_(\w+)\s+\(\w+\+\s*([0-9]+)\)/){
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fmt($1, $prev+$2)
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}
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elsif(/^#define __NR_(\w+)\s+\(__NR_Linux \+ ([0-9]+)/){
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fmt($1, $2);
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}
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}
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if($state < 0){
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$state = $state + 1;
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print "}\n\nconst (\n";
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goto GENERATE;
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}
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print ")";
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