Text file
src/runtime/sys_linux_arm64.s
1 // Copyright 2014 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
4
5 //
6 // System calls and other sys.stuff for arm64, Linux
7 //
8
9 #include "go_asm.h"
10 #include "go_tls.h"
11 #include "textflag.h"
12
13 #define AT_FDCWD -100
14
15 #define CLOCK_REALTIME 0
16 #define CLOCK_MONOTONIC 1
17
18 #define SYS_exit 93
19 #define SYS_read 63
20 #define SYS_write 64
21 #define SYS_openat 56
22 #define SYS_close 57
23 #define SYS_pipe2 59
24 #define SYS_fcntl 25
25 #define SYS_nanosleep 101
26 #define SYS_mmap 222
27 #define SYS_munmap 215
28 #define SYS_setitimer 103
29 #define SYS_clone 220
30 #define SYS_sched_yield 124
31 #define SYS_rt_sigreturn 139
32 #define SYS_rt_sigaction 134
33 #define SYS_rt_sigprocmask 135
34 #define SYS_sigaltstack 132
35 #define SYS_madvise 233
36 #define SYS_mincore 232
37 #define SYS_getpid 172
38 #define SYS_gettid 178
39 #define SYS_kill 129
40 #define SYS_tgkill 131
41 #define SYS_futex 98
42 #define SYS_sched_getaffinity 123
43 #define SYS_exit_group 94
44 #define SYS_epoll_create1 20
45 #define SYS_epoll_ctl 21
46 #define SYS_epoll_pwait 22
47 #define SYS_clock_gettime 113
48 #define SYS_faccessat 48
49 #define SYS_socket 198
50 #define SYS_connect 203
51 #define SYS_brk 214
52 #define SYS_timer_create 107
53 #define SYS_timer_settime 110
54 #define SYS_timer_delete 111
55
56 TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0-4
57 MOVW code+0(FP), R0
58 MOVD $SYS_exit_group, R8
59 SVC
60 RET
61
62 // func exitThread(wait *uint32)
63 TEXT runtime·exitThread(SB),NOSPLIT|NOFRAME,$0-8
64 MOVD wait+0(FP), R0
65 // We're done using the stack.
66 MOVW $0, R1
67 STLRW R1, (R0)
68 MOVW $0, R0 // exit code
69 MOVD $SYS_exit, R8
70 SVC
71 JMP 0(PC)
72
73 TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0-20
74 MOVD $AT_FDCWD, R0
75 MOVD name+0(FP), R1
76 MOVW mode+8(FP), R2
77 MOVW perm+12(FP), R3
78 MOVD $SYS_openat, R8
79 SVC
80 CMN $4095, R0
81 BCC done
82 MOVW $-1, R0
83 done:
84 MOVW R0, ret+16(FP)
85 RET
86
87 TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0-12
88 MOVW fd+0(FP), R0
89 MOVD $SYS_close, R8
90 SVC
91 CMN $4095, R0
92 BCC done
93 MOVW $-1, R0
94 done:
95 MOVW R0, ret+8(FP)
96 RET
97
98 TEXT runtime·write1(SB),NOSPLIT|NOFRAME,$0-28
99 MOVD fd+0(FP), R0
100 MOVD p+8(FP), R1
101 MOVW n+16(FP), R2
102 MOVD $SYS_write, R8
103 SVC
104 MOVW R0, ret+24(FP)
105 RET
106
107 TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0-28
108 MOVW fd+0(FP), R0
109 MOVD p+8(FP), R1
110 MOVW n+16(FP), R2
111 MOVD $SYS_read, R8
112 SVC
113 MOVW R0, ret+24(FP)
114 RET
115
116 // func pipe() (r, w int32, errno int32)
117 TEXT runtime·pipe(SB),NOSPLIT|NOFRAME,$0-12
118 MOVD $r+0(FP), R0
119 MOVW $0, R1
120 MOVW $SYS_pipe2, R8
121 SVC
122 MOVW R0, errno+8(FP)
123 RET
124
125 // func pipe2(flags int32) (r, w int32, errno int32)
126 TEXT runtime·pipe2(SB),NOSPLIT|NOFRAME,$0-20
127 MOVD $r+8(FP), R0
128 MOVW flags+0(FP), R1
129 MOVW $SYS_pipe2, R8
130 SVC
131 MOVW R0, errno+16(FP)
132 RET
133
134 TEXT runtime·usleep(SB),NOSPLIT,$24-4
135 MOVWU usec+0(FP), R3
136 MOVD R3, R5
137 MOVW $1000000, R4
138 UDIV R4, R3
139 MOVD R3, 8(RSP)
140 MUL R3, R4
141 SUB R4, R5
142 MOVW $1000, R4
143 MUL R4, R5
144 MOVD R5, 16(RSP)
145
146 // nanosleep(&ts, 0)
147 ADD $8, RSP, R0
148 MOVD $0, R1
149 MOVD $SYS_nanosleep, R8
150 SVC
151 RET
152
153 TEXT runtime·gettid(SB),NOSPLIT,$0-4
154 MOVD $SYS_gettid, R8
155 SVC
156 MOVW R0, ret+0(FP)
157 RET
158
159 TEXT runtime·raise(SB),NOSPLIT|NOFRAME,$0
160 MOVD $SYS_getpid, R8
161 SVC
162 MOVW R0, R19
163 MOVD $SYS_gettid, R8
164 SVC
165 MOVW R0, R1 // arg 2 tid
166 MOVW R19, R0 // arg 1 pid
167 MOVW sig+0(FP), R2 // arg 3
168 MOVD $SYS_tgkill, R8
169 SVC
170 RET
171
172 TEXT runtime·raiseproc(SB),NOSPLIT|NOFRAME,$0
173 MOVD $SYS_getpid, R8
174 SVC
175 MOVW R0, R0 // arg 1 pid
176 MOVW sig+0(FP), R1 // arg 2
177 MOVD $SYS_kill, R8
178 SVC
179 RET
180
181 TEXT ·getpid(SB),NOSPLIT|NOFRAME,$0-8
182 MOVD $SYS_getpid, R8
183 SVC
184 MOVD R0, ret+0(FP)
185 RET
186
187 TEXT ·tgkill(SB),NOSPLIT,$0-24
188 MOVD tgid+0(FP), R0
189 MOVD tid+8(FP), R1
190 MOVD sig+16(FP), R2
191 MOVD $SYS_tgkill, R8
192 SVC
193 RET
194
195 TEXT runtime·setitimer(SB),NOSPLIT|NOFRAME,$0-24
196 MOVW mode+0(FP), R0
197 MOVD new+8(FP), R1
198 MOVD old+16(FP), R2
199 MOVD $SYS_setitimer, R8
200 SVC
201 RET
202
203 TEXT runtime·timer_create(SB),NOSPLIT,$0-28
204 MOVW clockid+0(FP), R0
205 MOVD sevp+8(FP), R1
206 MOVD timerid+16(FP), R2
207 MOVD $SYS_timer_create, R8
208 SVC
209 MOVW R0, ret+24(FP)
210 RET
211
212 TEXT runtime·timer_settime(SB),NOSPLIT,$0-28
213 MOVW timerid+0(FP), R0
214 MOVW flags+4(FP), R1
215 MOVD new+8(FP), R2
216 MOVD old+16(FP), R3
217 MOVD $SYS_timer_settime, R8
218 SVC
219 MOVW R0, ret+24(FP)
220 RET
221
222 TEXT runtime·timer_delete(SB),NOSPLIT,$0-12
223 MOVW timerid+0(FP), R0
224 MOVD $SYS_timer_delete, R8
225 SVC
226 MOVW R0, ret+8(FP)
227 RET
228
229 TEXT runtime·mincore(SB),NOSPLIT|NOFRAME,$0-28
230 MOVD addr+0(FP), R0
231 MOVD n+8(FP), R1
232 MOVD dst+16(FP), R2
233 MOVD $SYS_mincore, R8
234 SVC
235 MOVW R0, ret+24(FP)
236 RET
237
238 // func walltime() (sec int64, nsec int32)
239 TEXT runtime·walltime(SB),NOSPLIT,$24-12
240 MOVD RSP, R20 // R20 is unchanged by C code
241 MOVD RSP, R1
242
243 MOVD g_m(g), R21 // R21 = m
244
245 // Set vdsoPC and vdsoSP for SIGPROF traceback.
246 // Save the old values on stack and restore them on exit,
247 // so this function is reentrant.
248 MOVD m_vdsoPC(R21), R2
249 MOVD m_vdsoSP(R21), R3
250 MOVD R2, 8(RSP)
251 MOVD R3, 16(RSP)
252
253 MOVD $ret-8(FP), R2 // caller's SP
254 MOVD LR, m_vdsoPC(R21)
255 MOVD R2, m_vdsoSP(R21)
256
257 MOVD m_curg(R21), R0
258 CMP g, R0
259 BNE noswitch
260
261 MOVD m_g0(R21), R3
262 MOVD (g_sched+gobuf_sp)(R3), R1 // Set RSP to g0 stack
263
264 noswitch:
265 SUB $16, R1
266 BIC $15, R1 // Align for C code
267 MOVD R1, RSP
268
269 MOVW $CLOCK_REALTIME, R0
270 MOVD runtime·vdsoClockgettimeSym(SB), R2
271 CBZ R2, fallback
272
273 // Store g on gsignal's stack, so if we receive a signal
274 // during VDSO code we can find the g.
275 // If we don't have a signal stack, we won't receive signal,
276 // so don't bother saving g.
277 // When using cgo, we already saved g on TLS, also don't save
278 // g here.
279 // Also don't save g if we are already on the signal stack.
280 // We won't get a nested signal.
281 MOVBU runtime·iscgo(SB), R22
282 CBNZ R22, nosaveg
283 MOVD m_gsignal(R21), R22 // g.m.gsignal
284 CBZ R22, nosaveg
285 CMP g, R22
286 BEQ nosaveg
287 MOVD (g_stack+stack_lo)(R22), R22 // g.m.gsignal.stack.lo
288 MOVD g, (R22)
289
290 BL (R2)
291
292 MOVD ZR, (R22) // clear g slot, R22 is unchanged by C code
293
294 B finish
295
296 nosaveg:
297 BL (R2)
298 B finish
299
300 fallback:
301 MOVD $SYS_clock_gettime, R8
302 SVC
303
304 finish:
305 MOVD 0(RSP), R3 // sec
306 MOVD 8(RSP), R5 // nsec
307
308 MOVD R20, RSP // restore SP
309 // Restore vdsoPC, vdsoSP
310 // We don't worry about being signaled between the two stores.
311 // If we are not in a signal handler, we'll restore vdsoSP to 0,
312 // and no one will care about vdsoPC. If we are in a signal handler,
313 // we cannot receive another signal.
314 MOVD 16(RSP), R1
315 MOVD R1, m_vdsoSP(R21)
316 MOVD 8(RSP), R1
317 MOVD R1, m_vdsoPC(R21)
318
319 MOVD R3, sec+0(FP)
320 MOVW R5, nsec+8(FP)
321 RET
322
323 TEXT runtime·nanotime1(SB),NOSPLIT,$24-8
324 MOVD RSP, R20 // R20 is unchanged by C code
325 MOVD RSP, R1
326
327 MOVD g_m(g), R21 // R21 = m
328
329 // Set vdsoPC and vdsoSP for SIGPROF traceback.
330 // Save the old values on stack and restore them on exit,
331 // so this function is reentrant.
332 MOVD m_vdsoPC(R21), R2
333 MOVD m_vdsoSP(R21), R3
334 MOVD R2, 8(RSP)
335 MOVD R3, 16(RSP)
336
337 MOVD $ret-8(FP), R2 // caller's SP
338 MOVD LR, m_vdsoPC(R21)
339 MOVD R2, m_vdsoSP(R21)
340
341 MOVD m_curg(R21), R0
342 CMP g, R0
343 BNE noswitch
344
345 MOVD m_g0(R21), R3
346 MOVD (g_sched+gobuf_sp)(R3), R1 // Set RSP to g0 stack
347
348 noswitch:
349 SUB $32, R1
350 BIC $15, R1
351 MOVD R1, RSP
352
353 MOVW $CLOCK_MONOTONIC, R0
354 MOVD runtime·vdsoClockgettimeSym(SB), R2
355 CBZ R2, fallback
356
357 // Store g on gsignal's stack, so if we receive a signal
358 // during VDSO code we can find the g.
359 // If we don't have a signal stack, we won't receive signal,
360 // so don't bother saving g.
361 // When using cgo, we already saved g on TLS, also don't save
362 // g here.
363 // Also don't save g if we are already on the signal stack.
364 // We won't get a nested signal.
365 MOVBU runtime·iscgo(SB), R22
366 CBNZ R22, nosaveg
367 MOVD m_gsignal(R21), R22 // g.m.gsignal
368 CBZ R22, nosaveg
369 CMP g, R22
370 BEQ nosaveg
371 MOVD (g_stack+stack_lo)(R22), R22 // g.m.gsignal.stack.lo
372 MOVD g, (R22)
373
374 BL (R2)
375
376 MOVD ZR, (R22) // clear g slot, R22 is unchanged by C code
377
378 B finish
379
380 nosaveg:
381 BL (R2)
382 B finish
383
384 fallback:
385 MOVD $SYS_clock_gettime, R8
386 SVC
387
388 finish:
389 MOVD 0(RSP), R3 // sec
390 MOVD 8(RSP), R5 // nsec
391
392 MOVD R20, RSP // restore SP
393 // Restore vdsoPC, vdsoSP
394 // We don't worry about being signaled between the two stores.
395 // If we are not in a signal handler, we'll restore vdsoSP to 0,
396 // and no one will care about vdsoPC. If we are in a signal handler,
397 // we cannot receive another signal.
398 MOVD 16(RSP), R1
399 MOVD R1, m_vdsoSP(R21)
400 MOVD 8(RSP), R1
401 MOVD R1, m_vdsoPC(R21)
402
403 // sec is in R3, nsec in R5
404 // return nsec in R3
405 MOVD $1000000000, R4
406 MUL R4, R3
407 ADD R5, R3
408 MOVD R3, ret+0(FP)
409 RET
410
411 TEXT runtime·rtsigprocmask(SB),NOSPLIT|NOFRAME,$0-28
412 MOVW how+0(FP), R0
413 MOVD new+8(FP), R1
414 MOVD old+16(FP), R2
415 MOVW size+24(FP), R3
416 MOVD $SYS_rt_sigprocmask, R8
417 SVC
418 CMN $4095, R0
419 BCC done
420 MOVD $0, R0
421 MOVD R0, (R0) // crash
422 done:
423 RET
424
425 TEXT runtime·rt_sigaction(SB),NOSPLIT|NOFRAME,$0-36
426 MOVD sig+0(FP), R0
427 MOVD new+8(FP), R1
428 MOVD old+16(FP), R2
429 MOVD size+24(FP), R3
430 MOVD $SYS_rt_sigaction, R8
431 SVC
432 MOVW R0, ret+32(FP)
433 RET
434
435 // Call the function stored in _cgo_sigaction using the GCC calling convention.
436 TEXT runtime·callCgoSigaction(SB),NOSPLIT,$0
437 MOVD sig+0(FP), R0
438 MOVD new+8(FP), R1
439 MOVD old+16(FP), R2
440 MOVD _cgo_sigaction(SB), R3
441 SUB $16, RSP // reserve 16 bytes for sp-8 where fp may be saved.
442 BL R3
443 ADD $16, RSP
444 MOVW R0, ret+24(FP)
445 RET
446
447 TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
448 MOVW sig+8(FP), R0
449 MOVD info+16(FP), R1
450 MOVD ctx+24(FP), R2
451 MOVD fn+0(FP), R11
452 BL (R11)
453 RET
454
455 TEXT runtime·sigtramp(SB),NOSPLIT,$192
456 // Save callee-save registers in the case of signal forwarding.
457 // Please refer to https://golang.org/issue/31827 .
458 MOVD R19, 8*4(RSP)
459 MOVD R20, 8*5(RSP)
460 MOVD R21, 8*6(RSP)
461 MOVD R22, 8*7(RSP)
462 MOVD R23, 8*8(RSP)
463 MOVD R24, 8*9(RSP)
464 MOVD R25, 8*10(RSP)
465 MOVD R26, 8*11(RSP)
466 MOVD R27, 8*12(RSP)
467 MOVD g, 8*13(RSP)
468 MOVD R29, 8*14(RSP)
469 FMOVD F8, 8*15(RSP)
470 FMOVD F9, 8*16(RSP)
471 FMOVD F10, 8*17(RSP)
472 FMOVD F11, 8*18(RSP)
473 FMOVD F12, 8*19(RSP)
474 FMOVD F13, 8*20(RSP)
475 FMOVD F14, 8*21(RSP)
476 FMOVD F15, 8*22(RSP)
477
478 // this might be called in external code context,
479 // where g is not set.
480 // first save R0, because runtime·load_g will clobber it
481 MOVW R0, 8(RSP)
482 MOVBU runtime·iscgo(SB), R0
483 CBZ R0, 2(PC)
484 BL runtime·load_g(SB)
485
486 MOVD R1, 16(RSP)
487 MOVD R2, 24(RSP)
488 MOVD $runtime·sigtrampgo(SB), R0
489 BL (R0)
490
491 // Restore callee-save registers.
492 MOVD 8*4(RSP), R19
493 MOVD 8*5(RSP), R20
494 MOVD 8*6(RSP), R21
495 MOVD 8*7(RSP), R22
496 MOVD 8*8(RSP), R23
497 MOVD 8*9(RSP), R24
498 MOVD 8*10(RSP), R25
499 MOVD 8*11(RSP), R26
500 MOVD 8*12(RSP), R27
501 MOVD 8*13(RSP), g
502 MOVD 8*14(RSP), R29
503 FMOVD 8*15(RSP), F8
504 FMOVD 8*16(RSP), F9
505 FMOVD 8*17(RSP), F10
506 FMOVD 8*18(RSP), F11
507 FMOVD 8*19(RSP), F12
508 FMOVD 8*20(RSP), F13
509 FMOVD 8*21(RSP), F14
510 FMOVD 8*22(RSP), F15
511
512 RET
513
514 TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0
515 MOVD $runtime·sigtramp(SB), R3
516 B (R3)
517
518 TEXT runtime·sysMmap(SB),NOSPLIT|NOFRAME,$0
519 MOVD addr+0(FP), R0
520 MOVD n+8(FP), R1
521 MOVW prot+16(FP), R2
522 MOVW flags+20(FP), R3
523 MOVW fd+24(FP), R4
524 MOVW off+28(FP), R5
525
526 MOVD $SYS_mmap, R8
527 SVC
528 CMN $4095, R0
529 BCC ok
530 NEG R0,R0
531 MOVD $0, p+32(FP)
532 MOVD R0, err+40(FP)
533 RET
534 ok:
535 MOVD R0, p+32(FP)
536 MOVD $0, err+40(FP)
537 RET
538
539 // Call the function stored in _cgo_mmap using the GCC calling convention.
540 // This must be called on the system stack.
541 TEXT runtime·callCgoMmap(SB),NOSPLIT,$0
542 MOVD addr+0(FP), R0
543 MOVD n+8(FP), R1
544 MOVW prot+16(FP), R2
545 MOVW flags+20(FP), R3
546 MOVW fd+24(FP), R4
547 MOVW off+28(FP), R5
548 MOVD _cgo_mmap(SB), R9
549 SUB $16, RSP // reserve 16 bytes for sp-8 where fp may be saved.
550 BL R9
551 ADD $16, RSP
552 MOVD R0, ret+32(FP)
553 RET
554
555 TEXT runtime·sysMunmap(SB),NOSPLIT|NOFRAME,$0
556 MOVD addr+0(FP), R0
557 MOVD n+8(FP), R1
558 MOVD $SYS_munmap, R8
559 SVC
560 CMN $4095, R0
561 BCC cool
562 MOVD R0, 0xf0(R0)
563 cool:
564 RET
565
566 // Call the function stored in _cgo_munmap using the GCC calling convention.
567 // This must be called on the system stack.
568 TEXT runtime·callCgoMunmap(SB),NOSPLIT,$0
569 MOVD addr+0(FP), R0
570 MOVD n+8(FP), R1
571 MOVD _cgo_munmap(SB), R9
572 SUB $16, RSP // reserve 16 bytes for sp-8 where fp may be saved.
573 BL R9
574 ADD $16, RSP
575 RET
576
577 TEXT runtime·madvise(SB),NOSPLIT|NOFRAME,$0
578 MOVD addr+0(FP), R0
579 MOVD n+8(FP), R1
580 MOVW flags+16(FP), R2
581 MOVD $SYS_madvise, R8
582 SVC
583 MOVW R0, ret+24(FP)
584 RET
585
586 // int64 futex(int32 *uaddr, int32 op, int32 val,
587 // struct timespec *timeout, int32 *uaddr2, int32 val2);
588 TEXT runtime·futex(SB),NOSPLIT|NOFRAME,$0
589 MOVD addr+0(FP), R0
590 MOVW op+8(FP), R1
591 MOVW val+12(FP), R2
592 MOVD ts+16(FP), R3
593 MOVD addr2+24(FP), R4
594 MOVW val3+32(FP), R5
595 MOVD $SYS_futex, R8
596 SVC
597 MOVW R0, ret+40(FP)
598 RET
599
600 // int64 clone(int32 flags, void *stk, M *mp, G *gp, void (*fn)(void));
601 TEXT runtime·clone(SB),NOSPLIT|NOFRAME,$0
602 MOVW flags+0(FP), R0
603 MOVD stk+8(FP), R1
604
605 // Copy mp, gp, fn off parent stack for use by child.
606 MOVD mp+16(FP), R10
607 MOVD gp+24(FP), R11
608 MOVD fn+32(FP), R12
609
610 MOVD R10, -8(R1)
611 MOVD R11, -16(R1)
612 MOVD R12, -24(R1)
613 MOVD $1234, R10
614 MOVD R10, -32(R1)
615
616 MOVD $SYS_clone, R8
617 SVC
618
619 // In parent, return.
620 CMP ZR, R0
621 BEQ child
622 MOVW R0, ret+40(FP)
623 RET
624 child:
625
626 // In child, on new stack.
627 MOVD -32(RSP), R10
628 MOVD $1234, R0
629 CMP R0, R10
630 BEQ good
631 MOVD $0, R0
632 MOVD R0, (R0) // crash
633
634 good:
635 // Initialize m->procid to Linux tid
636 MOVD $SYS_gettid, R8
637 SVC
638
639 MOVD -24(RSP), R12 // fn
640 MOVD -16(RSP), R11 // g
641 MOVD -8(RSP), R10 // m
642
643 CMP $0, R10
644 BEQ nog
645 CMP $0, R11
646 BEQ nog
647
648 MOVD R0, m_procid(R10)
649
650 // TODO: setup TLS.
651
652 // In child, set up new stack
653 MOVD R10, g_m(R11)
654 MOVD R11, g
655 //CALL runtime·stackcheck(SB)
656
657 nog:
658 // Call fn
659 MOVD R12, R0
660 BL (R0)
661
662 // It shouldn't return. If it does, exit that thread.
663 MOVW $111, R0
664 again:
665 MOVD $SYS_exit, R8
666 SVC
667 B again // keep exiting
668
669 TEXT runtime·sigaltstack(SB),NOSPLIT|NOFRAME,$0
670 MOVD new+0(FP), R0
671 MOVD old+8(FP), R1
672 MOVD $SYS_sigaltstack, R8
673 SVC
674 CMN $4095, R0
675 BCC ok
676 MOVD $0, R0
677 MOVD R0, (R0) // crash
678 ok:
679 RET
680
681 TEXT runtime·osyield(SB),NOSPLIT|NOFRAME,$0
682 MOVD $SYS_sched_yield, R8
683 SVC
684 RET
685
686 TEXT runtime·sched_getaffinity(SB),NOSPLIT|NOFRAME,$0
687 MOVD pid+0(FP), R0
688 MOVD len+8(FP), R1
689 MOVD buf+16(FP), R2
690 MOVD $SYS_sched_getaffinity, R8
691 SVC
692 MOVW R0, ret+24(FP)
693 RET
694
695 // int32 runtime·epollcreate(int32 size);
696 TEXT runtime·epollcreate(SB),NOSPLIT|NOFRAME,$0
697 MOVW $0, R0
698 MOVD $SYS_epoll_create1, R8
699 SVC
700 MOVW R0, ret+8(FP)
701 RET
702
703 // int32 runtime·epollcreate1(int32 flags);
704 TEXT runtime·epollcreate1(SB),NOSPLIT|NOFRAME,$0
705 MOVW flags+0(FP), R0
706 MOVD $SYS_epoll_create1, R8
707 SVC
708 MOVW R0, ret+8(FP)
709 RET
710
711 // func epollctl(epfd, op, fd int32, ev *epollEvent) int
712 TEXT runtime·epollctl(SB),NOSPLIT|NOFRAME,$0
713 MOVW epfd+0(FP), R0
714 MOVW op+4(FP), R1
715 MOVW fd+8(FP), R2
716 MOVD ev+16(FP), R3
717 MOVD $SYS_epoll_ctl, R8
718 SVC
719 MOVW R0, ret+24(FP)
720 RET
721
722 // int32 runtime·epollwait(int32 epfd, EpollEvent *ev, int32 nev, int32 timeout);
723 TEXT runtime·epollwait(SB),NOSPLIT|NOFRAME,$0
724 MOVW epfd+0(FP), R0
725 MOVD ev+8(FP), R1
726 MOVW nev+16(FP), R2
727 MOVW timeout+20(FP), R3
728 MOVD $0, R4
729 MOVD $SYS_epoll_pwait, R8
730 SVC
731 MOVW R0, ret+24(FP)
732 RET
733
734 // void runtime·closeonexec(int32 fd);
735 TEXT runtime·closeonexec(SB),NOSPLIT|NOFRAME,$0
736 MOVW fd+0(FP), R0 // fd
737 MOVD $2, R1 // F_SETFD
738 MOVD $1, R2 // FD_CLOEXEC
739 MOVD $SYS_fcntl, R8
740 SVC
741 RET
742
743 // func runtime·setNonblock(int32 fd)
744 TEXT runtime·setNonblock(SB),NOSPLIT|NOFRAME,$0-4
745 MOVW fd+0(FP), R0 // fd
746 MOVD $3, R1 // F_GETFL
747 MOVD $0, R2
748 MOVD $SYS_fcntl, R8
749 SVC
750 MOVD $0x800, R2 // O_NONBLOCK
751 ORR R0, R2
752 MOVW fd+0(FP), R0 // fd
753 MOVD $4, R1 // F_SETFL
754 MOVD $SYS_fcntl, R8
755 SVC
756 RET
757
758 // int access(const char *name, int mode)
759 TEXT runtime·access(SB),NOSPLIT,$0-20
760 MOVD $AT_FDCWD, R0
761 MOVD name+0(FP), R1
762 MOVW mode+8(FP), R2
763 MOVD $SYS_faccessat, R8
764 SVC
765 MOVW R0, ret+16(FP)
766 RET
767
768 // int connect(int fd, const struct sockaddr *addr, socklen_t len)
769 TEXT runtime·connect(SB),NOSPLIT,$0-28
770 MOVW fd+0(FP), R0
771 MOVD addr+8(FP), R1
772 MOVW len+16(FP), R2
773 MOVD $SYS_connect, R8
774 SVC
775 MOVW R0, ret+24(FP)
776 RET
777
778 // int socket(int domain, int typ, int prot)
779 TEXT runtime·socket(SB),NOSPLIT,$0-20
780 MOVW domain+0(FP), R0
781 MOVW typ+4(FP), R1
782 MOVW prot+8(FP), R2
783 MOVD $SYS_socket, R8
784 SVC
785 MOVW R0, ret+16(FP)
786 RET
787
788 // func sbrk0() uintptr
789 TEXT runtime·sbrk0(SB),NOSPLIT,$0-8
790 // Implemented as brk(NULL).
791 MOVD $0, R0
792 MOVD $SYS_brk, R8
793 SVC
794 MOVD R0, ret+0(FP)
795 RET
796
797 TEXT runtime·sigreturn(SB),NOSPLIT,$0-0
798 RET
799
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