rsc.io/go@v0.0.0-20150416155037-e040fd465409/src/syscall/mksysnum_linux.pl (about)

     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  
     6  use strict;
     7  
     8  my $command = "mksysnum_linux.pl ". join(' ', @ARGV);
     9  
    10  print <<EOF;
    11  // $command
    12  // MACHINE GENERATED BY THE ABOVE COMMAND; DO NOT EDIT
    13  
    14  package syscall
    15  
    16  const(
    17  EOF
    18  
    19  sub fmt {
    20  	my ($name, $num) = @_;
    21  	if($num > 999){
    22  		# ignore depricated syscalls that are no longer implemented
    23  		# https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/include/uapi/asm-generic/unistd.h?id=refs/heads/master#n716
    24  		return;
    25  	}
    26  	$name =~ y/a-z/A-Z/;
    27  	print "	SYS_$name = $num;\n";
    28  }
    29  
    30  my $prev;
    31  while(<>){
    32  	if(/^#define __NR_syscalls\s+/) {
    33  		# ignore redefinitions of __NR_syscalls
    34  	}
    35  	elsif(/^#define __NR_(\w+)\s+([0-9]+)/){
    36  		$prev = $2;
    37  		fmt($1, $2);
    38  	}
    39  	elsif(/^#define __NR3264_(\w+)\s+([0-9]+)/){
    40  		$prev = $2;
    41  		fmt($1, $2);
    42  	}
    43  	elsif(/^#define __NR_(\w+)\s+\(\w+\+\s*([0-9]+)\)/){
    44  		fmt($1, $prev+$2)
    45  	}
    46  }
    47  
    48  print <<EOF;
    49  )
    50  EOF