1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
|
// Copyright 2014 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.
package runtime
import "unsafe"
var (
libc_chdir,
libc_chroot,
libc_close,
libc_execve,
libc_fcntl,
libc_forkx,
libc_gethostname,
libc_getpid,
libc_ioctl,
libc_setgid,
libc_setgroups,
libc_setsid,
libc_setuid,
libc_setpgid,
libc_syscall,
libc_wait4 libcFunc
)
//go:linkname pipe1x runtime.pipe1
var pipe1x libcFunc // name to take addr of pipe1
func pipe1() // declared for vet; do NOT call
// Many of these are exported via linkname to assembly in the syscall
// package.
//go:nosplit
//go:linkname syscall_sysvicall6
func syscall_sysvicall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
call := libcall{
fn: fn,
n: nargs,
args: uintptr(unsafe.Pointer(&a1)),
}
entersyscallblock()
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
exitsyscall()
return call.r1, call.r2, call.err
}
//go:nosplit
//go:linkname syscall_rawsysvicall6
func syscall_rawsysvicall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
call := libcall{
fn: fn,
n: nargs,
args: uintptr(unsafe.Pointer(&a1)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
return call.r1, call.r2, call.err
}
// TODO(aram): Once we remove all instances of C calling sysvicallN, make
// sysvicallN return errors and replace the body of the following functions
// with calls to sysvicallN.
//go:nosplit
//go:linkname syscall_chdir
func syscall_chdir(path uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_chdir)),
n: 1,
args: uintptr(unsafe.Pointer(&path)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
return call.err
}
//go:nosplit
//go:linkname syscall_chroot
func syscall_chroot(path uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_chroot)),
n: 1,
args: uintptr(unsafe.Pointer(&path)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
return call.err
}
// like close, but must not split stack, for forkx.
//go:nosplit
//go:linkname syscall_close
func syscall_close(fd int32) int32 {
return int32(sysvicall1(&libc_close, uintptr(fd)))
}
const _F_DUP2FD = 0x9
//go:nosplit
//go:linkname syscall_dup2
func syscall_dup2(oldfd, newfd uintptr) (val, err uintptr) {
return syscall_fcntl(oldfd, _F_DUP2FD, newfd)
}
//go:nosplit
//go:linkname syscall_execve
func syscall_execve(path, argv, envp uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_execve)),
n: 3,
args: uintptr(unsafe.Pointer(&path)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
return call.err
}
// like exit, but must not split stack, for forkx.
//go:nosplit
//go:linkname syscall_exit
func syscall_exit(code uintptr) {
sysvicall1(&libc_exit, code)
}
//go:nosplit
//go:linkname syscall_fcntl
func syscall_fcntl(fd, cmd, arg uintptr) (val, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_fcntl)),
n: 3,
args: uintptr(unsafe.Pointer(&fd)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
return call.r1, call.err
}
//go:nosplit
//go:linkname syscall_forkx
func syscall_forkx(flags uintptr) (pid uintptr, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_forkx)),
n: 1,
args: uintptr(unsafe.Pointer(&flags)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
if int(call.r1) != -1 {
call.err = 0
}
return call.r1, call.err
}
//go:linkname syscall_gethostname
func syscall_gethostname() (name string, err uintptr) {
cname := new([_MAXHOSTNAMELEN]byte)
var args = [2]uintptr{uintptr(unsafe.Pointer(&cname[0])), _MAXHOSTNAMELEN}
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_gethostname)),
n: 2,
args: uintptr(unsafe.Pointer(&args[0])),
}
entersyscallblock()
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
exitsyscall()
if call.r1 != 0 {
return "", call.err
}
cname[_MAXHOSTNAMELEN-1] = 0
return gostringnocopy(&cname[0]), 0
}
//go:nosplit
//go:linkname syscall_getpid
func syscall_getpid() (pid, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_getpid)),
n: 0,
args: uintptr(unsafe.Pointer(&libc_getpid)), // it's unused but must be non-nil, otherwise crashes
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
return call.r1, call.err
}
//go:nosplit
//go:linkname syscall_ioctl
func syscall_ioctl(fd, req, arg uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_ioctl)),
n: 3,
args: uintptr(unsafe.Pointer(&fd)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
return call.err
}
//go:linkname syscall_pipe
func syscall_pipe() (r, w, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&pipe1x)),
n: 0,
args: uintptr(unsafe.Pointer(&pipe1x)), // it's unused but must be non-nil, otherwise crashes
}
entersyscallblock()
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
exitsyscall()
return call.r1, call.r2, call.err
}
// This is syscall.RawSyscall, it exists to satisfy some build dependency,
// but it doesn't work.
//
//go:linkname syscall_rawsyscall
func syscall_rawsyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
panic("RawSyscall not available on Solaris")
}
// This is syscall.RawSyscall6, it exists to avoid a linker error because
// syscall.RawSyscall6 is already declared. See golang.org/issue/24357
//
//go:linkname syscall_rawsyscall6
func syscall_rawsyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
panic("RawSyscall6 not available on Solaris")
}
//go:nosplit
//go:linkname syscall_setgid
func syscall_setgid(gid uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_setgid)),
n: 1,
args: uintptr(unsafe.Pointer(&gid)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
return call.err
}
//go:nosplit
//go:linkname syscall_setgroups
func syscall_setgroups(ngid, gid uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_setgroups)),
n: 2,
args: uintptr(unsafe.Pointer(&ngid)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
return call.err
}
//go:nosplit
//go:linkname syscall_setsid
func syscall_setsid() (pid, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_setsid)),
n: 0,
args: uintptr(unsafe.Pointer(&libc_setsid)), // it's unused but must be non-nil, otherwise crashes
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
return call.r1, call.err
}
//go:nosplit
//go:linkname syscall_setuid
func syscall_setuid(uid uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_setuid)),
n: 1,
args: uintptr(unsafe.Pointer(&uid)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
return call.err
}
//go:nosplit
//go:linkname syscall_setpgid
func syscall_setpgid(pid, pgid uintptr) (err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_setpgid)),
n: 2,
args: uintptr(unsafe.Pointer(&pid)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
return call.err
}
//go:linkname syscall_syscall
func syscall_syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_syscall)),
n: 4,
args: uintptr(unsafe.Pointer(&trap)),
}
entersyscallblock()
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
exitsyscall()
return call.r1, call.r2, call.err
}
//go:linkname syscall_wait4
func syscall_wait4(pid uintptr, wstatus *uint32, options uintptr, rusage unsafe.Pointer) (wpid int, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_wait4)),
n: 4,
args: uintptr(unsafe.Pointer(&pid)),
}
entersyscallblock()
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
exitsyscall()
return int(call.r1), call.err
}
//go:nosplit
//go:linkname syscall_write
func syscall_write(fd, buf, nbyte uintptr) (n, err uintptr) {
call := libcall{
fn: uintptr(unsafe.Pointer(&libc_write)),
n: 3,
args: uintptr(unsafe.Pointer(&fd)),
}
asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
return call.r1, call.err
}
|
