diff options
Diffstat (limited to 'vendor/github.com/fsouza/go-dockerclient/external/golang.org/x/sys/unix/mksyscall.pl')
-rwxr-xr-x | vendor/github.com/fsouza/go-dockerclient/external/golang.org/x/sys/unix/mksyscall.pl | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/vendor/github.com/fsouza/go-dockerclient/external/golang.org/x/sys/unix/mksyscall.pl b/vendor/github.com/fsouza/go-dockerclient/external/golang.org/x/sys/unix/mksyscall.pl new file mode 100755 index 0000000..b1e7766 --- /dev/null +++ b/vendor/github.com/fsouza/go-dockerclient/external/golang.org/x/sys/unix/mksyscall.pl | |||
@@ -0,0 +1,323 @@ | |||
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 | # This program reads a file containing function prototypes | ||
7 | # (like syscall_darwin.go) and generates system call bodies. | ||
8 | # The prototypes are marked by lines beginning with "//sys" | ||
9 | # and read like func declarations if //sys is replaced by func, but: | ||
10 | # * The parameter lists must give a name for each argument. | ||
11 | # This includes return parameters. | ||
12 | # * The parameter lists must give a type for each argument: | ||
13 | # the (x, y, z int) shorthand is not allowed. | ||
14 | # * If the return parameter is an error number, it must be named errno. | ||
15 | |||
16 | # A line beginning with //sysnb is like //sys, except that the | ||
17 | # goroutine will not be suspended during the execution of the system | ||
18 | # call. This must only be used for system calls which can never | ||
19 | # block, as otherwise the system call could cause all goroutines to | ||
20 | # hang. | ||
21 | |||
22 | use strict; | ||
23 | |||
24 | my $cmdline = "mksyscall.pl " . join(' ', @ARGV); | ||
25 | my $errors = 0; | ||
26 | my $_32bit = ""; | ||
27 | my $plan9 = 0; | ||
28 | my $openbsd = 0; | ||
29 | my $netbsd = 0; | ||
30 | my $dragonfly = 0; | ||
31 | my $arm = 0; # 64-bit value should use (even, odd)-pair | ||
32 | |||
33 | if($ARGV[0] eq "-b32") { | ||
34 | $_32bit = "big-endian"; | ||
35 | shift; | ||
36 | } elsif($ARGV[0] eq "-l32") { | ||
37 | $_32bit = "little-endian"; | ||
38 | shift; | ||
39 | } | ||
40 | if($ARGV[0] eq "-plan9") { | ||
41 | $plan9 = 1; | ||
42 | shift; | ||
43 | } | ||
44 | if($ARGV[0] eq "-openbsd") { | ||
45 | $openbsd = 1; | ||
46 | shift; | ||
47 | } | ||
48 | if($ARGV[0] eq "-netbsd") { | ||
49 | $netbsd = 1; | ||
50 | shift; | ||
51 | } | ||
52 | if($ARGV[0] eq "-dragonfly") { | ||
53 | $dragonfly = 1; | ||
54 | shift; | ||
55 | } | ||
56 | if($ARGV[0] eq "-arm") { | ||
57 | $arm = 1; | ||
58 | shift; | ||
59 | } | ||
60 | |||
61 | if($ARGV[0] =~ /^-/) { | ||
62 | print STDERR "usage: mksyscall.pl [-b32 | -l32] [file ...]\n"; | ||
63 | exit 1; | ||
64 | } | ||
65 | |||
66 | if($ENV{'GOARCH'} eq "" || $ENV{'GOOS'} eq "") { | ||
67 | print STDERR "GOARCH or GOOS not defined in environment\n"; | ||
68 | exit 1; | ||
69 | } | ||
70 | |||
71 | sub parseparamlist($) { | ||
72 | my ($list) = @_; | ||
73 | $list =~ s/^\s*//; | ||
74 | $list =~ s/\s*$//; | ||
75 | if($list eq "") { | ||
76 | return (); | ||
77 | } | ||
78 | return split(/\s*,\s*/, $list); | ||
79 | } | ||
80 | |||
81 | sub parseparam($) { | ||
82 | my ($p) = @_; | ||
83 | if($p !~ /^(\S*) (\S*)$/) { | ||
84 | print STDERR "$ARGV:$.: malformed parameter: $p\n"; | ||
85 | $errors = 1; | ||
86 | return ("xx", "int"); | ||
87 | } | ||
88 | return ($1, $2); | ||
89 | } | ||
90 | |||
91 | my $text = ""; | ||
92 | while(<>) { | ||
93 | chomp; | ||
94 | s/\s+/ /g; | ||
95 | s/^\s+//; | ||
96 | s/\s+$//; | ||
97 | my $nonblock = /^\/\/sysnb /; | ||
98 | next if !/^\/\/sys / && !$nonblock; | ||
99 | |||
100 | # Line must be of the form | ||
101 | # func Open(path string, mode int, perm int) (fd int, errno error) | ||
102 | # Split into name, in params, out params. | ||
103 | if(!/^\/\/sys(nb)? (\w+)\(([^()]*)\)\s*(?:\(([^()]+)\))?\s*(?:=\s*((?i)SYS_[A-Z0-9_]+))?$/) { | ||
104 | print STDERR "$ARGV:$.: malformed //sys declaration\n"; | ||
105 | $errors = 1; | ||
106 | next; | ||
107 | } | ||
108 | my ($func, $in, $out, $sysname) = ($2, $3, $4, $5); | ||
109 | |||
110 | # Split argument lists on comma. | ||
111 | my @in = parseparamlist($in); | ||
112 | my @out = parseparamlist($out); | ||
113 | |||
114 | # Try in vain to keep people from editing this file. | ||
115 | # The theory is that they jump into the middle of the file | ||
116 | # without reading the header. | ||
117 | $text .= "// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT\n\n"; | ||
118 | |||
119 | # Go function header. | ||
120 | my $out_decl = @out ? sprintf(" (%s)", join(', ', @out)) : ""; | ||
121 | $text .= sprintf "func %s(%s)%s {\n", $func, join(', ', @in), $out_decl; | ||
122 | |||
123 | # Check if err return available | ||
124 | my $errvar = ""; | ||
125 | foreach my $p (@out) { | ||
126 | my ($name, $type) = parseparam($p); | ||
127 | if($type eq "error") { | ||
128 | $errvar = $name; | ||
129 | last; | ||
130 | } | ||
131 | } | ||
132 | |||
133 | # Prepare arguments to Syscall. | ||
134 | my @args = (); | ||
135 | my @uses = (); | ||
136 | my $n = 0; | ||
137 | foreach my $p (@in) { | ||
138 | my ($name, $type) = parseparam($p); | ||
139 | if($type =~ /^\*/) { | ||
140 | push @args, "uintptr(unsafe.Pointer($name))"; | ||
141 | } elsif($type eq "string" && $errvar ne "") { | ||
142 | $text .= "\tvar _p$n *byte\n"; | ||
143 | $text .= "\t_p$n, $errvar = BytePtrFromString($name)\n"; | ||
144 | $text .= "\tif $errvar != nil {\n\t\treturn\n\t}\n"; | ||
145 | push @args, "uintptr(unsafe.Pointer(_p$n))"; | ||
146 | push @uses, "use(unsafe.Pointer(_p$n))"; | ||
147 | $n++; | ||
148 | } elsif($type eq "string") { | ||
149 | print STDERR "$ARGV:$.: $func uses string arguments, but has no error return\n"; | ||
150 | $text .= "\tvar _p$n *byte\n"; | ||
151 | $text .= "\t_p$n, _ = BytePtrFromString($name)\n"; | ||
152 | push @args, "uintptr(unsafe.Pointer(_p$n))"; | ||
153 | push @uses, "use(unsafe.Pointer(_p$n))"; | ||
154 | $n++; | ||
155 | } elsif($type =~ /^\[\](.*)/) { | ||
156 | # Convert slice into pointer, length. | ||
157 | # Have to be careful not to take address of &a[0] if len == 0: | ||
158 | # pass dummy pointer in that case. | ||
159 | # Used to pass nil, but some OSes or simulators reject write(fd, nil, 0). | ||
160 | $text .= "\tvar _p$n unsafe.Pointer\n"; | ||
161 | $text .= "\tif len($name) > 0 {\n\t\t_p$n = unsafe.Pointer(\&${name}[0])\n\t}"; | ||
162 | $text .= " else {\n\t\t_p$n = unsafe.Pointer(&_zero)\n\t}"; | ||
163 | $text .= "\n"; | ||
164 | push @args, "uintptr(_p$n)", "uintptr(len($name))"; | ||
165 | $n++; | ||
166 | } elsif($type eq "int64" && ($openbsd || $netbsd)) { | ||
167 | push @args, "0"; | ||
168 | if($_32bit eq "big-endian") { | ||
169 | push @args, "uintptr($name>>32)", "uintptr($name)"; | ||
170 | } elsif($_32bit eq "little-endian") { | ||
171 | push @args, "uintptr($name)", "uintptr($name>>32)"; | ||
172 | } else { | ||
173 | push @args, "uintptr($name)"; | ||
174 | } | ||
175 | } elsif($type eq "int64" && $dragonfly) { | ||
176 | if ($func !~ /^extp(read|write)/i) { | ||
177 | push @args, "0"; | ||
178 | } | ||
179 | if($_32bit eq "big-endian") { | ||
180 | push @args, "uintptr($name>>32)", "uintptr($name)"; | ||
181 | } elsif($_32bit eq "little-endian") { | ||
182 | push @args, "uintptr($name)", "uintptr($name>>32)"; | ||
183 | } else { | ||
184 | push @args, "uintptr($name)"; | ||
185 | } | ||
186 | } elsif($type eq "int64" && $_32bit ne "") { | ||
187 | if(@args % 2 && $arm) { | ||
188 | # arm abi specifies 64-bit argument uses | ||
189 | # (even, odd) pair | ||
190 | push @args, "0" | ||
191 | } | ||
192 | if($_32bit eq "big-endian") { | ||
193 | push @args, "uintptr($name>>32)", "uintptr($name)"; | ||
194 | } else { | ||
195 | push @args, "uintptr($name)", "uintptr($name>>32)"; | ||
196 | } | ||
197 | } else { | ||
198 | push @args, "uintptr($name)"; | ||
199 | } | ||
200 | } | ||
201 | |||
202 | # Determine which form to use; pad args with zeros. | ||
203 | my $asm = "Syscall"; | ||
204 | if ($nonblock) { | ||
205 | $asm = "RawSyscall"; | ||
206 | } | ||
207 | if(@args <= 3) { | ||
208 | while(@args < 3) { | ||
209 | push @args, "0"; | ||
210 | } | ||
211 | } elsif(@args <= 6) { | ||
212 | $asm .= "6"; | ||
213 | while(@args < 6) { | ||
214 | push @args, "0"; | ||
215 | } | ||
216 | } elsif(@args <= 9) { | ||
217 | $asm .= "9"; | ||
218 | while(@args < 9) { | ||
219 | push @args, "0"; | ||
220 | } | ||
221 | } else { | ||
222 | print STDERR "$ARGV:$.: too many arguments to system call\n"; | ||
223 | } | ||
224 | |||
225 | # System call number. | ||
226 | if($sysname eq "") { | ||
227 | $sysname = "SYS_$func"; | ||
228 | $sysname =~ s/([a-z])([A-Z])/${1}_$2/g; # turn FooBar into Foo_Bar | ||
229 | $sysname =~ y/a-z/A-Z/; | ||
230 | } | ||
231 | |||
232 | # Actual call. | ||
233 | my $args = join(', ', @args); | ||
234 | my $call = "$asm($sysname, $args)"; | ||
235 | |||
236 | # Assign return values. | ||
237 | my $body = ""; | ||
238 | my @ret = ("_", "_", "_"); | ||
239 | my $do_errno = 0; | ||
240 | for(my $i=0; $i<@out; $i++) { | ||
241 | my $p = $out[$i]; | ||
242 | my ($name, $type) = parseparam($p); | ||
243 | my $reg = ""; | ||
244 | if($name eq "err" && !$plan9) { | ||
245 | $reg = "e1"; | ||
246 | $ret[2] = $reg; | ||
247 | $do_errno = 1; | ||
248 | } elsif($name eq "err" && $plan9) { | ||
249 | $ret[0] = "r0"; | ||
250 | $ret[2] = "e1"; | ||
251 | next; | ||
252 | } else { | ||
253 | $reg = sprintf("r%d", $i); | ||
254 | $ret[$i] = $reg; | ||
255 | } | ||
256 | if($type eq "bool") { | ||
257 | $reg = "$reg != 0"; | ||
258 | } | ||
259 | if($type eq "int64" && $_32bit ne "") { | ||
260 | # 64-bit number in r1:r0 or r0:r1. | ||
261 | if($i+2 > @out) { | ||
262 | print STDERR "$ARGV:$.: not enough registers for int64 return\n"; | ||
263 | } | ||
264 | if($_32bit eq "big-endian") { | ||
265 | $reg = sprintf("int64(r%d)<<32 | int64(r%d)", $i, $i+1); | ||
266 | } else { | ||
267 | $reg = sprintf("int64(r%d)<<32 | int64(r%d)", $i+1, $i); | ||
268 | } | ||
269 | $ret[$i] = sprintf("r%d", $i); | ||
270 | $ret[$i+1] = sprintf("r%d", $i+1); | ||
271 | } | ||
272 | if($reg ne "e1" || $plan9) { | ||
273 | $body .= "\t$name = $type($reg)\n"; | ||
274 | } | ||
275 | } | ||
276 | if ($ret[0] eq "_" && $ret[1] eq "_" && $ret[2] eq "_") { | ||
277 | $text .= "\t$call\n"; | ||
278 | } else { | ||
279 | $text .= "\t$ret[0], $ret[1], $ret[2] := $call\n"; | ||
280 | } | ||
281 | foreach my $use (@uses) { | ||
282 | $text .= "\t$use\n"; | ||
283 | } | ||
284 | $text .= $body; | ||
285 | |||
286 | if ($plan9 && $ret[2] eq "e1") { | ||
287 | $text .= "\tif int32(r0) == -1 {\n"; | ||
288 | $text .= "\t\terr = e1\n"; | ||
289 | $text .= "\t}\n"; | ||
290 | } elsif ($do_errno) { | ||
291 | $text .= "\tif e1 != 0 {\n"; | ||
292 | $text .= "\t\terr = errnoErr(e1)\n"; | ||
293 | $text .= "\t}\n"; | ||
294 | } | ||
295 | $text .= "\treturn\n"; | ||
296 | $text .= "}\n\n"; | ||
297 | } | ||
298 | |||
299 | chomp $text; | ||
300 | chomp $text; | ||
301 | |||
302 | if($errors) { | ||
303 | exit 1; | ||
304 | } | ||
305 | |||
306 | print <<EOF; | ||
307 | // $cmdline | ||
308 | // MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT | ||
309 | |||
310 | // +build $ENV{'GOARCH'},$ENV{'GOOS'} | ||
311 | |||
312 | package unix | ||
313 | |||
314 | import ( | ||
315 | "syscall" | ||
316 | "unsafe" | ||
317 | ) | ||
318 | |||
319 | var _ syscall.Errno | ||
320 | |||
321 | $text | ||
322 | EOF | ||
323 | exit 0; | ||