/
sys_linux_mips64x.s
464 lines (409 loc) · 9.29 KB
/
sys_linux_mips64x.s
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
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
// Copyright 2015 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 linux
// +build mips64 mips64le
//
// System calls and other sys.stuff for mips64, Linux
//
#include "go_asm.h"
#include "go_tls.h"
#include "textflag.h"
#define AT_FDCWD -100
#define SYS_exit 5058
#define SYS_read 5000
#define SYS_write 5001
#define SYS_close 5003
#define SYS_getpid 5038
#define SYS_kill 5060
#define SYS_fcntl 5080
#define SYS_mmap 5009
#define SYS_munmap 5011
#define SYS_setitimer 5036
#define SYS_clone 5055
#define SYS_nanosleep 5034
#define SYS_sched_yield 5023
#define SYS_rt_sigreturn 5211
#define SYS_rt_sigaction 5013
#define SYS_rt_sigprocmask 5014
#define SYS_sigaltstack 5129
#define SYS_madvise 5027
#define SYS_mincore 5026
#define SYS_gettid 5178
#define SYS_futex 5194
#define SYS_sched_getaffinity 5196
#define SYS_exit_group 5205
#define SYS_epoll_create 5207
#define SYS_epoll_ctl 5208
#define SYS_tgkill 5225
#define SYS_openat 5247
#define SYS_epoll_pwait 5272
#define SYS_clock_gettime 5222
#define SYS_epoll_create1 5285
#define SYS_brk 5012
TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0-4
MOVW code+0(FP), R4
MOVV $SYS_exit_group, R2
SYSCALL
RET
// func exitThread(wait *uint32)
TEXT runtime·exitThread(SB),NOSPLIT|NOFRAME,$0-8
MOVV wait+0(FP), R1
// We're done using the stack.
MOVW $0, R2
SYNC
MOVW R2, (R1)
SYNC
MOVW $0, R4 // exit code
MOVV $SYS_exit, R2
SYSCALL
JMP 0(PC)
TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0-20
// This uses openat instead of open, because Android O blocks open.
MOVW $AT_FDCWD, R4 // AT_FDCWD, so this acts like open
MOVV name+0(FP), R5
MOVW mode+8(FP), R6
MOVW perm+12(FP), R7
MOVV $SYS_openat, R2
SYSCALL
BEQ R7, 2(PC)
MOVW $-1, R2
MOVW R2, ret+16(FP)
RET
TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0-12
MOVW fd+0(FP), R4
MOVV $SYS_close, R2
SYSCALL
BEQ R7, 2(PC)
MOVW $-1, R2
MOVW R2, ret+8(FP)
RET
TEXT runtime·write(SB),NOSPLIT|NOFRAME,$0-28
MOVV fd+0(FP), R4
MOVV p+8(FP), R5
MOVW n+16(FP), R6
MOVV $SYS_write, R2
SYSCALL
BEQ R7, 2(PC)
MOVW $-1, R2
MOVW R2, ret+24(FP)
RET
TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0-28
MOVW fd+0(FP), R4
MOVV p+8(FP), R5
MOVW n+16(FP), R6
MOVV $SYS_read, R2
SYSCALL
BEQ R7, 2(PC)
MOVW $-1, R2
MOVW R2, ret+24(FP)
RET
TEXT runtime·usleep(SB),NOSPLIT,$16-4
MOVWU usec+0(FP), R3
MOVV R3, R5
MOVW $1000000, R4
DIVVU R4, R3
MOVV LO, R3
MOVV R3, 8(R29)
MOVW $1000, R4
MULVU R3, R4
MOVV LO, R4
SUBVU R4, R5
MOVV R5, 16(R29)
// nanosleep(&ts, 0)
ADDV $8, R29, R4
MOVW $0, R5
MOVV $SYS_nanosleep, R2
SYSCALL
RET
TEXT runtime·gettid(SB),NOSPLIT,$0-4
MOVV $SYS_gettid, R2
SYSCALL
MOVW R2, ret+0(FP)
RET
TEXT runtime·raise(SB),NOSPLIT|NOFRAME,$0
MOVV $SYS_getpid, R2
SYSCALL
MOVW R2, R16
MOVV $SYS_gettid, R2
SYSCALL
MOVW R2, R5 // arg 2 tid
MOVW R16, R4 // arg 1 pid
MOVW sig+0(FP), R6 // arg 3
MOVV $SYS_tgkill, R2
SYSCALL
RET
TEXT runtime·raiseproc(SB),NOSPLIT|NOFRAME,$0
MOVV $SYS_getpid, R2
SYSCALL
MOVW R2, R4 // arg 1 pid
MOVW sig+0(FP), R5 // arg 2
MOVV $SYS_kill, R2
SYSCALL
RET
TEXT runtime·setitimer(SB),NOSPLIT|NOFRAME,$0-24
MOVW mode+0(FP), R4
MOVV new+8(FP), R5
MOVV old+16(FP), R6
MOVV $SYS_setitimer, R2
SYSCALL
RET
TEXT runtime·mincore(SB),NOSPLIT|NOFRAME,$0-28
MOVV addr+0(FP), R4
MOVV n+8(FP), R5
MOVV dst+16(FP), R6
MOVV $SYS_mincore, R2
SYSCALL
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+24(FP)
RET
// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB),NOSPLIT,$16
MOVW $0, R4 // CLOCK_REALTIME
MOVV $0(R29), R5
MOVV $SYS_clock_gettime, R2
SYSCALL
MOVV 0(R29), R3 // sec
MOVV 8(R29), R5 // nsec
MOVV R3, sec+0(FP)
MOVW R5, nsec+8(FP)
RET
TEXT runtime·nanotime(SB),NOSPLIT,$16
MOVW $1, R4 // CLOCK_MONOTONIC
MOVV $0(R29), R5
MOVV $SYS_clock_gettime, R2
SYSCALL
MOVV 0(R29), R3 // sec
MOVV 8(R29), R5 // nsec
// sec is in R3, nsec in R5
// return nsec in R3
MOVV $1000000000, R4
MULVU R4, R3
MOVV LO, R3
ADDVU R5, R3
MOVV R3, ret+0(FP)
RET
TEXT runtime·rtsigprocmask(SB),NOSPLIT|NOFRAME,$0-28
MOVW how+0(FP), R4
MOVV new+8(FP), R5
MOVV old+16(FP), R6
MOVW size+24(FP), R7
MOVV $SYS_rt_sigprocmask, R2
SYSCALL
BEQ R7, 2(PC)
MOVV R0, 0xf1(R0) // crash
RET
TEXT runtime·rt_sigaction(SB),NOSPLIT|NOFRAME,$0-36
MOVV sig+0(FP), R4
MOVV new+8(FP), R5
MOVV old+16(FP), R6
MOVV size+24(FP), R7
MOVV $SYS_rt_sigaction, R2
SYSCALL
BEQ R7, 2(PC)
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+32(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
JAL (R25)
RET
TEXT runtime·sigtramp(SB),NOSPLIT,$64
// 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
TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0
JMP runtime·sigtramp(SB)
TEXT runtime·mmap(SB),NOSPLIT|NOFRAME,$0
MOVV addr+0(FP), R4
MOVV n+8(FP), R5
MOVW prot+16(FP), R6
MOVW flags+20(FP), R7
MOVW fd+24(FP), R8
MOVW off+28(FP), R9
MOVV $SYS_mmap, R2
SYSCALL
BEQ R7, ok
MOVV $0, p+32(FP)
MOVV R2, err+40(FP)
RET
ok:
MOVV R2, p+32(FP)
MOVV $0, err+40(FP)
RET
TEXT runtime·munmap(SB),NOSPLIT|NOFRAME,$0
MOVV addr+0(FP), R4
MOVV n+8(FP), R5
MOVV $SYS_munmap, R2
SYSCALL
BEQ R7, 2(PC)
MOVV R0, 0xf3(R0) // crash
RET
TEXT runtime·madvise(SB),NOSPLIT|NOFRAME,$0
MOVV addr+0(FP), R4
MOVV n+8(FP), R5
MOVW flags+16(FP), R6
MOVV $SYS_madvise, R2
SYSCALL
MOVW R2, ret+24(FP)
RET
// int64 futex(int32 *uaddr, int32 op, int32 val,
// struct timespec *timeout, int32 *uaddr2, int32 val2);
TEXT runtime·futex(SB),NOSPLIT|NOFRAME,$0
MOVV addr+0(FP), R4
MOVW op+8(FP), R5
MOVW val+12(FP), R6
MOVV ts+16(FP), R7
MOVV addr2+24(FP), R8
MOVW val3+32(FP), R9
MOVV $SYS_futex, R2
SYSCALL
BEQ R7, 2(PC)
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+40(FP)
RET
// int64 clone(int32 flags, void *stk, M *mp, G *gp, void (*fn)(void));
TEXT runtime·clone(SB),NOSPLIT|NOFRAME,$0
MOVW flags+0(FP), R4
MOVV stk+8(FP), R5
// Copy mp, gp, fn off parent stack for use by child.
// Careful: Linux system call clobbers ???.
MOVV mp+16(FP), R16
MOVV gp+24(FP), R17
MOVV fn+32(FP), R18
MOVV R16, -8(R5)
MOVV R17, -16(R5)
MOVV R18, -24(R5)
MOVV $1234, R16
MOVV R16, -32(R5)
MOVV $SYS_clone, R2
SYSCALL
BEQ R7, 2(PC)
SUBVU R2, R0, R2 // caller expects negative errno
// In parent, return.
BEQ R2, 3(PC)
MOVW R2, ret+40(FP)
RET
// In child, on new stack.
MOVV -32(R29), R16
MOVV $1234, R1
BEQ R16, R1, 2(PC)
MOVV R0, 0(R0)
// Initialize m->procid to Linux tid
MOVV $SYS_gettid, R2
SYSCALL
MOVV -24(R29), R18 // fn
MOVV -16(R29), R17 // g
MOVV -8(R29), R16 // m
BEQ R16, nog
BEQ R17, nog
MOVV R2, m_procid(R16)
// TODO: setup TLS.
// In child, set up new stack
MOVV R16, g_m(R17)
MOVV R17, g
//CALL runtime·stackcheck(SB)
nog:
// Call fn
JAL (R18)
// It shouldn't return. If it does, exit that thread.
MOVW $111, R4
MOVV $SYS_exit, R2
SYSCALL
JMP -3(PC) // keep exiting
TEXT runtime·sigaltstack(SB),NOSPLIT|NOFRAME,$0
MOVV new+0(FP), R4
MOVV old+8(FP), R5
MOVV $SYS_sigaltstack, R2
SYSCALL
BEQ R7, 2(PC)
MOVV R0, 0xf1(R0) // crash
RET
TEXT runtime·osyield(SB),NOSPLIT|NOFRAME,$0
MOVV $SYS_sched_yield, R2
SYSCALL
RET
TEXT runtime·sched_getaffinity(SB),NOSPLIT|NOFRAME,$0
MOVV pid+0(FP), R4
MOVV len+8(FP), R5
MOVV buf+16(FP), R6
MOVV $SYS_sched_getaffinity, R2
SYSCALL
BEQ R7, 2(PC)
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+24(FP)
RET
// int32 runtime·epollcreate(int32 size);
TEXT runtime·epollcreate(SB),NOSPLIT|NOFRAME,$0
MOVW size+0(FP), R4
MOVV $SYS_epoll_create, R2
SYSCALL
BEQ R7, 2(PC)
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+8(FP)
RET
// int32 runtime·epollcreate1(int32 flags);
TEXT runtime·epollcreate1(SB),NOSPLIT|NOFRAME,$0
MOVW flags+0(FP), R4
MOVV $SYS_epoll_create1, R2
SYSCALL
BEQ R7, 2(PC)
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+8(FP)
RET
// func epollctl(epfd, op, fd int32, ev *epollEvent) int
TEXT runtime·epollctl(SB),NOSPLIT|NOFRAME,$0
MOVW epfd+0(FP), R4
MOVW op+4(FP), R5
MOVW fd+8(FP), R6
MOVV ev+16(FP), R7
MOVV $SYS_epoll_ctl, R2
SYSCALL
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+24(FP)
RET
// int32 runtime·epollwait(int32 epfd, EpollEvent *ev, int32 nev, int32 timeout);
TEXT runtime·epollwait(SB),NOSPLIT|NOFRAME,$0
// This uses pwait instead of wait, because Android O blocks wait.
MOVW epfd+0(FP), R4
MOVV ev+8(FP), R5
MOVW nev+16(FP), R6
MOVW timeout+20(FP), R7
MOVV $0, R8
MOVV $SYS_epoll_pwait, R2
SYSCALL
BEQ R7, 2(PC)
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+24(FP)
RET
// void runtime·closeonexec(int32 fd);
TEXT runtime·closeonexec(SB),NOSPLIT|NOFRAME,$0
MOVW fd+0(FP), R4 // fd
MOVV $2, R5 // F_SETFD
MOVV $1, R6 // FD_CLOEXEC
MOVV $SYS_fcntl, R2
SYSCALL
RET
// func sbrk0() uintptr
TEXT runtime·sbrk0(SB),NOSPLIT|NOFRAME,$0-8
// Implemented as brk(NULL).
MOVV $0, R4
MOVV $SYS_brk, R2
SYSCALL
MOVV R2, ret+0(FP)
RET