forked from TrueCloudLab/restic
86 lines
1.9 KiB
Perl
86 lines
1.9 KiB
Perl
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#!/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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if($ENV{'GOARCH'} eq "" || $ENV{'GOOS'} eq "") {
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print STDERR "GOARCH or GOOS not defined in environment\n";
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exit 1;
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}
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# Check that we are using the new build system if we should
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if($ENV{'GOLANG_SYS_BUILD'} ne "docker") {
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print STDERR "In the new build system, mksysnum should not be called directly.\n";
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print STDERR "See README.md\n";
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exit 1;
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}
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my $command = "$0 ". join(' ', @ARGV);
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print <<EOF;
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// $command
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// Code generated by the command above; see README.md. DO NOT EDIT.
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// +build $ENV{'GOARCH'},$ENV{'GOOS'}
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package unix
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const(
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EOF
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my $offset = 0;
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sub fmt {
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my ($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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$name =~ y/a-z/A-Z/;
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$num = $num + $offset;
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print " SYS_$name = $num;\n";
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}
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my $prev;
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open(CC, "$ENV{'CC'} -E -dD @ARGV |") || die "can't run $ENV{'CC'}";
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while(<CC>){
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if(/^#define __NR_Linux\s+([0-9]+)/){
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# mips/mips64: extract offset
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$offset = $1;
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}
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elsif(/^#define __NR(\w*)_SYSCALL_BASE\s+([0-9]+)/){
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# arm: extract offset
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$offset = $1;
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}
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elsif(/^#define __NR_syscalls\s+/) {
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# ignore redefinitions of __NR_syscalls
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}
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elsif(/^#define __NR_(\w*)Linux_syscalls\s+/) {
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# mips/mips64: ignore definitions about the number of syscalls
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}
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elsif(/^#define __NR_(\w+)\s+([0-9]+)/){
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$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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elsif(/^#define __NR_(\w+)\s+\(__NR_SYSCALL_BASE \+ ([0-9]+)/){
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fmt($1, $2);
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}
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}
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print <<EOF;
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)
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EOF
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