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
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
|
// Copyright 2016 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.
// +build s390x,linux
package unix
import (
"unsafe"
)
//sys Dup2(oldfd int, newfd int) (err error)
//sysnb EpollCreate(size int) (fd int, err error)
//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
//sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
//sys Fchown(fd int, uid int, gid int) (err error)
//sys Fstat(fd int, stat *Stat_t) (err error)
//sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
//sys Fstatfs(fd int, buf *Statfs_t) (err error)
//sys Ftruncate(fd int, length int64) (err error)
//sysnb Getegid() (egid int)
//sysnb Geteuid() (euid int)
//sysnb Getgid() (gid int)
//sysnb Getrlimit(resource int, rlim *Rlimit) (err error)
//sysnb Getuid() (uid int)
//sysnb InotifyInit() (fd int, err error)
//sys Lchown(path string, uid int, gid int) (err error)
//sys Lstat(path string, stat *Stat_t) (err error)
//sys Pause() (err error)
//sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
//sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
//sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
//sys setfsgid(gid int) (prev int, err error)
//sys setfsuid(uid int) (prev int, err error)
//sysnb Setregid(rgid int, egid int) (err error)
//sysnb Setresgid(rgid int, egid int, sgid int) (err error)
//sysnb Setresuid(ruid int, euid int, suid int) (err error)
//sysnb Setrlimit(resource int, rlim *Rlimit) (err error)
//sysnb Setreuid(ruid int, euid int) (err error)
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
//sys Stat(path string, stat *Stat_t) (err error)
//sys Statfs(path string, buf *Statfs_t) (err error)
//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error)
//sys Truncate(path string, length int64) (err error)
//sys Ustat(dev int, ubuf *Ustat_t) (err error)
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
//sysnb setgroups(n int, list *_Gid_t) (err error)
//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
//sysnb Gettimeofday(tv *Timeval) (err error)
func Time(t *Time_t) (tt Time_t, err error) {
var tv Timeval
err = Gettimeofday(&tv)
if err != nil {
return 0, err
}
if t != nil {
*t = Time_t(tv.Sec)
}
return Time_t(tv.Sec), nil
}
//sys Utime(path string, buf *Utimbuf) (err error)
//sys utimes(path string, times *[2]Timeval) (err error)
func setTimespec(sec, nsec int64) Timespec {
return Timespec{Sec: sec, Nsec: nsec}
}
func setTimeval(sec, usec int64) Timeval {
return Timeval{Sec: sec, Usec: usec}
}
//sysnb pipe2(p *[2]_C_int, flags int) (err error)
func Pipe(p []int) (err error) {
if len(p) != 2 {
return EINVAL
}
var pp [2]_C_int
err = pipe2(&pp, 0) // pipe2 is the same as pipe when flags are set to 0.
p[0] = int(pp[0])
p[1] = int(pp[1])
return
}
func Pipe2(p []int, flags int) (err error) {
if len(p) != 2 {
return EINVAL
}
var pp [2]_C_int
err = pipe2(&pp, flags)
p[0] = int(pp[0])
p[1] = int(pp[1])
return
}
func Ioperm(from int, num int, on int) (err error) {
return ENOSYS
}
func Iopl(level int) (err error) {
return ENOSYS
}
func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr }
func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc }
func (iov *Iovec) SetLen(length int) {
iov.Len = uint64(length)
}
func (msghdr *Msghdr) SetControllen(length int) {
msghdr.Controllen = uint64(length)
}
func (msghdr *Msghdr) SetIovlen(length int) {
msghdr.Iovlen = uint64(length)
}
func (cmsg *Cmsghdr) SetLen(length int) {
cmsg.Len = uint64(length)
}
// Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct.
// mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>.
func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)}
r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0)
xaddr = uintptr(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// On s390x Linux, all the socket calls go through an extra indirection.
// The arguments to the underlying system call (SYS_SOCKETCALL) are the
// number below and a pointer to an array of uintptr.
const (
// see linux/net.h
netSocket = 1
netBind = 2
netConnect = 3
netListen = 4
netAccept = 5
netGetSockName = 6
netGetPeerName = 7
netSocketPair = 8
netSend = 9
netRecv = 10
netSendTo = 11
netRecvFrom = 12
netShutdown = 13
netSetSockOpt = 14
netGetSockOpt = 15
netSendMsg = 16
netRecvMsg = 17
netAccept4 = 18
netRecvMMsg = 19
netSendMMsg = 20
)
func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (int, error) {
args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))}
fd, _, err := Syscall(SYS_SOCKETCALL, netAccept, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return 0, err
}
return int(fd), nil
}
func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (int, error) {
args := [4]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags)}
fd, _, err := Syscall(SYS_SOCKETCALL, netAccept4, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return 0, err
}
return int(fd), nil
}
func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error {
args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))}
_, _, err := RawSyscall(SYS_SOCKETCALL, netGetSockName, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error {
args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))}
_, _, err := RawSyscall(SYS_SOCKETCALL, netGetPeerName, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func socketpair(domain int, typ int, flags int, fd *[2]int32) error {
args := [4]uintptr{uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd))}
_, _, err := RawSyscall(SYS_SOCKETCALL, netSocketPair, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func bind(s int, addr unsafe.Pointer, addrlen _Socklen) error {
args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)}
_, _, err := Syscall(SYS_SOCKETCALL, netBind, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func connect(s int, addr unsafe.Pointer, addrlen _Socklen) error {
args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)}
_, _, err := Syscall(SYS_SOCKETCALL, netConnect, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func socket(domain int, typ int, proto int) (int, error) {
args := [3]uintptr{uintptr(domain), uintptr(typ), uintptr(proto)}
fd, _, err := RawSyscall(SYS_SOCKETCALL, netSocket, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return 0, err
}
return int(fd), nil
}
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) error {
args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen))}
_, _, err := Syscall(SYS_SOCKETCALL, netGetSockOpt, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) error {
args := [4]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val)}
_, _, err := Syscall(SYS_SOCKETCALL, netSetSockOpt, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (int, error) {
var base uintptr
if len(p) > 0 {
base = uintptr(unsafe.Pointer(&p[0]))
}
args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))}
n, _, err := Syscall(SYS_SOCKETCALL, netRecvFrom, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return 0, err
}
return int(n), nil
}
func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) error {
var base uintptr
if len(p) > 0 {
base = uintptr(unsafe.Pointer(&p[0]))
}
args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)}
_, _, err := Syscall(SYS_SOCKETCALL, netSendTo, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func recvmsg(s int, msg *Msghdr, flags int) (int, error) {
args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)}
n, _, err := Syscall(SYS_SOCKETCALL, netRecvMsg, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return 0, err
}
return int(n), nil
}
func sendmsg(s int, msg *Msghdr, flags int) (int, error) {
args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)}
n, _, err := Syscall(SYS_SOCKETCALL, netSendMsg, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return 0, err
}
return int(n), nil
}
func Listen(s int, n int) error {
args := [2]uintptr{uintptr(s), uintptr(n)}
_, _, err := Syscall(SYS_SOCKETCALL, netListen, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func Shutdown(s, how int) error {
args := [2]uintptr{uintptr(s), uintptr(how)}
_, _, err := Syscall(SYS_SOCKETCALL, netShutdown, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
//sys poll(fds *PollFd, nfds int, timeout int) (n int, err error)
func Poll(fds []PollFd, timeout int) (n int, err error) {
if len(fds) == 0 {
return poll(nil, 0, timeout)
}
return poll(&fds[0], len(fds), timeout)
}
//sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
cmdlineLen := len(cmdline)
if cmdlineLen > 0 {
// Account for the additional NULL byte added by
// BytePtrFromString in kexecFileLoad. The kexec_file_load
// syscall expects a NULL-terminated string.
cmdlineLen++
}
return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
}
|
