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