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
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
|
// Copyright 2020 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.
//
// System calls and other sys.stuff for mips64, OpenBSD
// /usr/src/sys/kern/syscalls.master for syscall numbers.
//
#include "go_asm.h"
#include "go_tls.h"
#include "textflag.h"
#define CLOCK_REALTIME $0
#define CLOCK_MONOTONIC $3
// Exit the entire program (like C exit)
TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0
MOVW code+0(FP), R4 // arg 1 - status
MOVV $1, R2 // sys_exit
SYSCALL
BEQ R7, 3(PC)
MOVV $0, R2 // crash on syscall failure
MOVV R2, (R2)
RET
// func exitThread(wait *atomic.Uint32)
TEXT runtime·exitThread(SB),NOSPLIT,$0
MOVV wait+0(FP), R4 // arg 1 - notdead
MOVV $302, R2 // sys___threxit
SYSCALL
MOVV $0, R2 // crash on syscall failure
MOVV R2, (R2)
JMP 0(PC)
TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0
MOVV name+0(FP), R4 // arg 1 - path
MOVW mode+8(FP), R5 // arg 2 - mode
MOVW perm+12(FP), R6 // arg 3 - perm
MOVV $5, R2 // sys_open
SYSCALL
BEQ R7, 2(PC)
MOVW $-1, R2
MOVW R2, ret+16(FP)
RET
TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0
MOVW fd+0(FP), R4 // arg 1 - fd
MOVV $6, R2 // sys_close
SYSCALL
BEQ R7, 2(PC)
MOVW $-1, R2
MOVW R2, ret+8(FP)
RET
TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0
MOVW fd+0(FP), R4 // arg 1 - fd
MOVV p+8(FP), R5 // arg 2 - buf
MOVW n+16(FP), R6 // arg 3 - nbyte
MOVV $3, R2 // sys_read
SYSCALL
BEQ R7, 2(PC)
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+24(FP)
RET
// func pipe2(flags int32) (r, w int32, errno int32)
TEXT runtime·pipe2(SB),NOSPLIT|NOFRAME,$0-20
MOVV $r+8(FP), R4
MOVW flags+0(FP), R5
MOVV $101, R2 // sys_pipe2
SYSCALL
BEQ R7, 2(PC)
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, errno+16(FP)
RET
TEXT runtime·write1(SB),NOSPLIT|NOFRAME,$0
MOVV fd+0(FP), R4 // arg 1 - fd
MOVV p+8(FP), R5 // arg 2 - buf
MOVW n+16(FP), R6 // arg 3 - nbyte
MOVV $4, R2 // sys_write
SYSCALL
BEQ R7, 2(PC)
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+24(FP)
RET
TEXT runtime·usleep(SB),NOSPLIT,$24-4
MOVWU usec+0(FP), R3
MOVV R3, R5
MOVW $1000000, R4
DIVVU R4, R3
MOVV LO, R3
MOVV R3, 8(R29) // tv_sec
MOVW $1000, R4
MULVU R3, R4
MOVV LO, R4
SUBVU R4, R5
MOVV R5, 16(R29) // tv_nsec
ADDV $8, R29, R4 // arg 1 - rqtp
MOVV $0, R5 // arg 2 - rmtp
MOVV $91, R2 // sys_nanosleep
SYSCALL
RET
TEXT runtime·getthrid(SB),NOSPLIT,$0-4
MOVV $299, R2 // sys_getthrid
SYSCALL
MOVW R2, ret+0(FP)
RET
TEXT runtime·thrkill(SB),NOSPLIT,$0-16
MOVW tid+0(FP), R4 // arg 1 - tid
MOVV sig+8(FP), R5 // arg 2 - signum
MOVW $0, R6 // arg 3 - tcb
MOVV $119, R2 // sys_thrkill
SYSCALL
RET
TEXT runtime·raiseproc(SB),NOSPLIT,$0
MOVV $20, R4 // sys_getpid
SYSCALL
MOVV R2, R4 // arg 1 - pid
MOVW sig+0(FP), R5 // arg 2 - signum
MOVV $122, R2 // sys_kill
SYSCALL
RET
TEXT runtime·mmap(SB),NOSPLIT,$0
MOVV addr+0(FP), R4 // arg 1 - addr
MOVV n+8(FP), R5 // arg 2 - len
MOVW prot+16(FP), R6 // arg 3 - prot
MOVW flags+20(FP), R7 // arg 4 - flags
MOVW fd+24(FP), R8 // arg 5 - fd
MOVW $0, R9 // arg 6 - pad
MOVW off+28(FP), R10 // arg 7 - offset
MOVV $197, R2 // sys_mmap
SYSCALL
MOVV $0, R4
BEQ R7, 3(PC)
MOVV R2, R4 // if error, move to R4
MOVV $0, R2
MOVV R2, p+32(FP)
MOVV R4, err+40(FP)
RET
TEXT runtime·munmap(SB),NOSPLIT,$0
MOVV addr+0(FP), R4 // arg 1 - addr
MOVV n+8(FP), R5 // arg 2 - len
MOVV $73, R2 // sys_munmap
SYSCALL
BEQ R7, 3(PC)
MOVV $0, R2 // crash on syscall failure
MOVV R2, (R2)
RET
TEXT runtime·madvise(SB),NOSPLIT,$0
MOVV addr+0(FP), R4 // arg 1 - addr
MOVV n+8(FP), R5 // arg 2 - len
MOVW flags+16(FP), R6 // arg 2 - flags
MOVV $75, R2 // sys_madvise
SYSCALL
BEQ R7, 2(PC)
MOVW $-1, R2
MOVW R2, ret+24(FP)
RET
TEXT runtime·setitimer(SB),NOSPLIT,$0
MOVW mode+0(FP), R4 // arg 1 - mode
MOVV new+8(FP), R5 // arg 2 - new value
MOVV old+16(FP), R6 // arg 3 - old value
MOVV $69, R2 // sys_setitimer
SYSCALL
RET
// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB), NOSPLIT, $32
MOVW CLOCK_REALTIME, R4 // arg 1 - clock_id
MOVV $8(R29), R5 // arg 2 - tp
MOVV $87, R2 // sys_clock_gettime
SYSCALL
MOVV 8(R29), R4 // sec
MOVV 16(R29), R5 // nsec
MOVV R4, sec+0(FP)
MOVW R5, nsec+8(FP)
RET
// int64 nanotime1(void) so really
// void nanotime1(int64 *nsec)
TEXT runtime·nanotime1(SB),NOSPLIT,$32
MOVW CLOCK_MONOTONIC, R4 // arg 1 - clock_id
MOVV $8(R29), R5 // arg 2 - tp
MOVV $87, R2 // sys_clock_gettime
SYSCALL
MOVV 8(R29), R3 // sec
MOVV 16(R29), R5 // nsec
MOVV $1000000000, R4
MULVU R4, R3
MOVV LO, R3
ADDVU R5, R3
MOVV R3, ret+0(FP)
RET
TEXT runtime·sigaction(SB),NOSPLIT,$0
MOVW sig+0(FP), R4 // arg 1 - signum
MOVV new+8(FP), R5 // arg 2 - new sigaction
MOVV old+16(FP), R6 // arg 3 - old sigaction
MOVV $46, R2 // sys_sigaction
SYSCALL
BEQ R7, 3(PC)
MOVV $3, R2 // crash on syscall failure
MOVV R2, (R2)
RET
TEXT runtime·obsdsigprocmask(SB),NOSPLIT,$0
MOVW how+0(FP), R4 // arg 1 - mode
MOVW new+4(FP), R5 // arg 2 - new
MOVV $48, R2 // sys_sigprocmask
SYSCALL
BEQ R7, 3(PC)
MOVV $3, R2 // crash on syscall failure
MOVV R2, (R2)
MOVW R2, ret+8(FP)
RET
TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
MOVW sig+8(FP), R4
MOVV info+16(FP), R5
MOVV ctx+24(FP), R6
MOVV fn+0(FP), R25 // Must use R25, needed for PIC code.
CALL (R25)
RET
TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$192
// initialize REGSB = PC&0xffffffff00000000
BGEZAL R0, 1(PC)
SRLV $32, R31, RSB
SLLV $32, RSB
// this might be called in external code context,
// where g is not set.
MOVB runtime·iscgo(SB), R1
BEQ R1, 2(PC)
JAL runtime·load_g(SB)
MOVW R4, 8(R29)
MOVV R5, 16(R29)
MOVV R6, 24(R29)
MOVV $runtime·sigtrampgo(SB), R1
JAL (R1)
RET
// int32 tfork(void *param, uintptr psize, M *mp, G *gp, void (*fn)(void));
TEXT runtime·tfork(SB),NOSPLIT,$0
// Copy mp, gp and fn off parent stack for use by child.
MOVV mm+16(FP), R16
MOVV gg+24(FP), R17
MOVV fn+32(FP), R18
MOVV param+0(FP), R4 // arg 1 - param
MOVV psize+8(FP), R5 // arg 2 - psize
MOVV $8, R2 // sys___tfork
SYSCALL
// Return if syscall failed.
BEQ R7, 4(PC)
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+40(FP)
RET
// In parent, return.
BEQ R2, 3(PC)
MOVW $0, ret+40(FP)
RET
// Initialise m, g.
MOVV R17, g
MOVV R16, g_m(g)
// Call fn.
CALL (R18)
// fn should never return.
MOVV $2, R8 // crash if reached
MOVV R8, (R8)
RET
TEXT runtime·sigaltstack(SB),NOSPLIT,$0
MOVV new+0(FP), R4 // arg 1 - new sigaltstack
MOVV old+8(FP), R5 // arg 2 - old sigaltstack
MOVV $288, R2 // sys_sigaltstack
SYSCALL
BEQ R7, 3(PC)
MOVV $0, R8 // crash on syscall failure
MOVV R8, (R8)
RET
TEXT runtime·osyield(SB),NOSPLIT,$0
MOVV $298, R2 // sys_sched_yield
SYSCALL
RET
TEXT runtime·thrsleep(SB),NOSPLIT,$0
MOVV ident+0(FP), R4 // arg 1 - ident
MOVW clock_id+8(FP), R5 // arg 2 - clock_id
MOVV tsp+16(FP), R6 // arg 3 - tsp
MOVV lock+24(FP), R7 // arg 4 - lock
MOVV abort+32(FP), R8 // arg 5 - abort
MOVV $94, R2 // sys___thrsleep
SYSCALL
MOVW R2, ret+40(FP)
RET
TEXT runtime·thrwakeup(SB),NOSPLIT,$0
MOVV ident+0(FP), R4 // arg 1 - ident
MOVW n+8(FP), R5 // arg 2 - n
MOVV $301, R2 // sys___thrwakeup
SYSCALL
MOVW R2, ret+16(FP)
RET
TEXT runtime·sysctl(SB),NOSPLIT,$0
MOVV mib+0(FP), R4 // arg 1 - mib
MOVW miblen+8(FP), R5 // arg 2 - miblen
MOVV out+16(FP), R6 // arg 3 - out
MOVV size+24(FP), R7 // arg 4 - size
MOVV dst+32(FP), R8 // arg 5 - dest
MOVV ndst+40(FP), R9 // arg 6 - newlen
MOVV $202, R2 // sys___sysctl
SYSCALL
BEQ R7, 2(PC)
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+48(FP)
RET
// int32 runtime·kqueue(void);
TEXT runtime·kqueue(SB),NOSPLIT,$0
MOVV $269, R2 // sys_kqueue
SYSCALL
BEQ R7, 2(PC)
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+0(FP)
RET
// int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout);
TEXT runtime·kevent(SB),NOSPLIT,$0
MOVW kq+0(FP), R4 // arg 1 - kq
MOVV ch+8(FP), R5 // arg 2 - changelist
MOVW nch+16(FP), R6 // arg 3 - nchanges
MOVV ev+24(FP), R7 // arg 4 - eventlist
MOVW nev+32(FP), R8 // arg 5 - nevents
MOVV ts+40(FP), R9 // arg 6 - timeout
MOVV $72, R2 // sys_kevent
SYSCALL
BEQ R7, 2(PC)
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+48(FP)
RET
// func fcntl(fd, cmd, arg int32) (int32, int32)
TEXT runtime·fcntl(SB),NOSPLIT,$0
MOVW fd+0(FP), R4 // fd
MOVW cmd+4(FP), R5 // cmd
MOVW arg+8(FP), R6 // arg
MOVV $92, R2 // sys_fcntl
SYSCALL
MOVV $0, R4
BEQ R7, noerr
MOVV R2, R4
MOVW $-1, R2
noerr:
MOVW R2, ret+16(FP)
MOVW R4, errno+20(FP)
RET
// func issetugid() int32
TEXT runtime·issetugid(SB),NOSPLIT,$0
MOVV $253, R2 // sys_issetugid
SYSCALL
MOVW R2, ret+0(FP)
RET
|
