diff options
Diffstat (limited to 'src/pkg/syscall/mksyscall_solaris.pl')
| -rwxr-xr-x | src/pkg/syscall/mksyscall_solaris.pl | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/src/pkg/syscall/mksyscall_solaris.pl b/src/pkg/syscall/mksyscall_solaris.pl new file mode 100755 index 000000000..130d043d9 --- /dev/null +++ b/src/pkg/syscall/mksyscall_solaris.pl @@ -0,0 +1,279 @@ +#!/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. + +# This program reads a file containing function prototypes +# (like syscall_solaris.go) and generates system call bodies. +# The prototypes are marked by lines beginning with "//sys" +# and read like func declarations if //sys is replaced by func, but: +# * The parameter lists must give a name for each argument. +# This includes return parameters. +# * The parameter lists must give a type for each argument: +# the (x, y, z int) shorthand is not allowed. +# * If the return parameter is an error number, it must be named err. +# * If go func name needs to be different than its libc name, +# * or the function is not in libc, name could be specified +# * at the end, after "=" sign, like +# //sys getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (err error) = libsocket.getsockopt + +use strict; + +my $cmdline = "mksyscall_solaris.pl " . join(' ', @ARGV); +my $errors = 0; +my $_32bit = ""; + +binmode STDOUT; + +if($ARGV[0] eq "-b32") { + $_32bit = "big-endian"; + shift; +} elsif($ARGV[0] eq "-l32") { + $_32bit = "little-endian"; + shift; +} + +if($ARGV[0] =~ /^-/) { + print STDERR "usage: mksyscall_solaris.pl [-b32 | -l32] [file ...]\n"; + exit 1; +} + +sub parseparamlist($) { + my ($list) = @_; + $list =~ s/^\s*//; + $list =~ s/\s*$//; + if($list eq "") { + return (); + } + return split(/\s*,\s*/, $list); +} + +sub parseparam($) { + my ($p) = @_; + if($p !~ /^(\S*) (\S*)$/) { + print STDERR "$ARGV:$.: malformed parameter: $p\n"; + $errors = 1; + return ("xx", "int"); + } + return ($1, $2); +} + +my $package = ""; +my $text = ""; +my $vars = ""; +my $mods = ""; +my $modnames = ""; +while(<>) { + chomp; + s/\s+/ /g; + s/^\s+//; + s/\s+$//; + $package = $1 if !$package && /^package (\S+)$/; + my $nonblock = /^\/\/sysnb /; + next if !/^\/\/sys / && !$nonblock; + + my $syscalldot = ""; + $syscalldot = "syscall." if $package ne "syscall"; + + # Line must be of the form + # func Open(path string, mode int, perm int) (fd int, err error) + # Split into name, in params, out params. + if(!/^\/\/sys(nb)? (\w+)\(([^()]*)\)\s*(?:\(([^()]+)\))?\s*(?:=\s*(?:(\w*)\.)?(\w*))?$/) { + print STDERR "$ARGV:$.: malformed //sys declaration\n"; + $errors = 1; + next; + } + my ($nb, $func, $in, $out, $modname, $sysname) = ($1, $2, $3, $4, $5, $6); + + # Split argument lists on comma. + my @in = parseparamlist($in); + my @out = parseparamlist($out); + + # So file name. + if($modname eq "") { + $modname = "libc"; + } + my $modvname = "mod$modname"; + if($modnames !~ /$modname/) { + $modnames .= ".$modname"; + $mods .= "\t$modvname = ${syscalldot}newLazySO(\"$modname.so\")\n"; + } + + # System call name. + if($sysname eq "") { + $sysname = "$func"; + } + + # System call pointer variable name. + my $sysvarname = "proc$sysname"; + + my $strconvfunc = "BytePtrFromString"; + my $strconvtype = "*byte"; + + # Library proc address variable. + $sysname =~ y/A-Z/a-z/; # All libc functions are lowercase. + $vars .= "\t$sysvarname = $modvname.NewProc(\"$sysname\")\n"; + + # Go function header. + $out = join(', ', @out); + if($out ne "") { + $out = " ($out)"; + } + if($text ne "") { + $text .= "\n" + } + $text .= sprintf "func %s(%s)%s {\n", $func, join(', ', @in), $out; + + # Check if err return available + my $errvar = ""; + foreach my $p (@out) { + my ($name, $type) = parseparam($p); + if($type eq "error") { + $errvar = $name; + last; + } + } + + # Prepare arguments to Syscall. + my @args = (); + my $n = 0; + my @pin= (); + foreach my $p (@in) { + my ($name, $type) = parseparam($p); + if($type =~ /^\*/) { + push @args, "uintptr(unsafe.Pointer($name))"; + } elsif($type eq "string" && $errvar ne "") { + $text .= "\tvar _p$n $strconvtype\n"; + $text .= "\t_p$n, $errvar = $strconvfunc($name)\n"; + $text .= "\tif $errvar != nil {\n\t\treturn\n\t}\n"; + push @args, "uintptr(unsafe.Pointer(_p$n))"; + $n++; + } elsif($type eq "string") { + print STDERR "$ARGV:$.: $func uses string arguments, but has no error return\n"; + $text .= "\tvar _p$n $strconvtype\n"; + $text .= "\t_p$n, _ = $strconvfunc($name)\n"; + push @args, "uintptr(unsafe.Pointer(_p$n))"; + $n++; + } elsif($type =~ /^\[\](.*)/) { + # Convert slice into pointer, length. + # Have to be careful not to take address of &a[0] if len == 0: + # pass nil in that case. + $text .= "\tvar _p$n *$1\n"; + $text .= "\tif len($name) > 0 {\n\t\t_p$n = \&$name\[0]\n\t}\n"; + push @args, "uintptr(unsafe.Pointer(_p$n))", "uintptr(len($name))"; + $n++; + } elsif($type eq "int64" && $_32bit ne "") { + if($_32bit eq "big-endian") { + push @args, "uintptr($name >> 32)", "uintptr($name)"; + } else { + push @args, "uintptr($name)", "uintptr($name >> 32)"; + } + } elsif($type eq "bool") { + $text .= "\tvar _p$n uint32\n"; + $text .= "\tif $name {\n\t\t_p$n = 1\n\t} else {\n\t\t_p$n = 0\n\t}\n"; + push @args, "uintptr(_p$n)"; + $n++; + } else { + push @args, "uintptr($name)"; + } + push @pin, sprintf "\"%s=\", %s, ", $name, $name; + } + my $nargs = @args; + + # Determine which form to use; pad args with zeros. + my $asm = "${syscalldot}sysvicall6"; + if ($nonblock) { + $asm = "${syscalldot}rawSysvicall6"; + } + if(@args <= 6) { + while(@args < 6) { + push @args, "0"; + } + } else { + print STDERR "$ARGV:$.: too many arguments to system call\n"; + } + + # Actual call. + my $args = join(', ', @args); + my $call = "$asm($sysvarname.Addr(), $nargs, $args)"; + + # Assign return values. + my $body = ""; + my $failexpr = ""; + my @ret = ("_", "_", "_"); + my @pout= (); + my $do_errno = 0; + for(my $i=0; $i<@out; $i++) { + my $p = $out[$i]; + my ($name, $type) = parseparam($p); + my $reg = ""; + if($name eq "err") { + $reg = "e1"; + $ret[2] = $reg; + $do_errno = 1; + } else { + $reg = sprintf("r%d", $i); + $ret[$i] = $reg; + } + if($type eq "bool") { + $reg = "$reg != 0"; + } + if($type eq "int64" && $_32bit ne "") { + # 64-bit number in r1:r0 or r0:r1. + if($i+2 > @out) { + print STDERR "$ARGV:$.: not enough registers for int64 return\n"; + } + if($_32bit eq "big-endian") { + $reg = sprintf("int64(r%d)<<32 | int64(r%d)", $i, $i+1); + } else { + $reg = sprintf("int64(r%d)<<32 | int64(r%d)", $i+1, $i); + } + $ret[$i] = sprintf("r%d", $i); + $ret[$i+1] = sprintf("r%d", $i+1); + } + if($reg ne "e1") { + $body .= "\t$name = $type($reg)\n"; + } + } + if ($ret[0] eq "_" && $ret[1] eq "_" && $ret[2] eq "_") { + $text .= "\t$call\n"; + } else { + $text .= "\t$ret[0], $ret[1], $ret[2] := $call\n"; + } + $text .= $body; + + if ($do_errno) { + $text .= "\tif e1 != 0 {\n"; + $text .= "\t\terr = e1\n"; + $text .= "\t}\n"; + } + $text .= "\treturn\n"; + $text .= "}\n"; +} + +if($errors) { + exit 1; +} + +print <<EOF; +// $cmdline +// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT + +package $package + +import "unsafe" +EOF + +print "import \"syscall\"\n" if $package ne "syscall"; + +print <<EOF; + +var ( +$mods +$vars +) + +$text + +EOF +exit 0; |