summaryrefslogtreecommitdiffstats
path: root/src/runtime/sys_netbsd_arm64.s
blob: 23e749424136e5a9bbff8f257be9d5c81ee8153b (plain)
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
// Copyright 2019 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 arm64, NetBSD
//

#include "go_asm.h"
#include "go_tls.h"
#include "textflag.h"
#include "cgo/abi_arm64.h"

#define CLOCK_REALTIME		0
#define CLOCK_MONOTONIC		3

#define SYS_exit			1
#define SYS_read			3
#define SYS_write			4
#define SYS_open			5
#define SYS_close			6
#define SYS_getpid			20
#define SYS_kill			37
#define SYS_munmap			73
#define SYS_madvise			75
#define SYS_fcntl			92
#define SYS_mmap			197
#define SYS___sysctl			202
#define SYS___sigaltstack14		281
#define SYS___sigprocmask14		293
#define SYS_issetugid			305
#define SYS_getcontext			307
#define SYS_setcontext			308
#define SYS__lwp_create			309
#define SYS__lwp_exit			310
#define SYS__lwp_self			311
#define SYS__lwp_kill			318
#define SYS__lwp_unpark			321
#define SYS___sigaction_sigtramp	340
#define SYS_kqueue			344
#define SYS_sched_yield			350
#define SYS___setitimer50		425
#define SYS___clock_gettime50		427
#define SYS___nanosleep50		430
#define SYS___kevent50			435
#define SYS_pipe2			453
#define SYS_openat			468
#define SYS____lwp_park60		478

// int32 lwp_create(void *context, uintptr flags, void *lwpid)
TEXT runtime·lwp_create(SB),NOSPLIT,$0
	MOVD	ctxt+0(FP), R0
	MOVD	flags+8(FP), R1
	MOVD	lwpid+16(FP), R2
	SVC	$SYS__lwp_create
	BCC	ok
	NEG	R0, R0
ok:
	MOVW	R0, ret+24(FP)
	RET

TEXT runtime·lwp_tramp(SB),NOSPLIT,$0
	CMP	$0, R1
	BEQ	nog
	CMP	$0, R2
	BEQ	nog

	MOVD	R0, g_m(R1)
	MOVD	R1, g
nog:
	CALL	(R2)

	MOVD	$0, R0  // crash (not reached)
	MOVD	R0, (R8)

TEXT ·netbsdMstart(SB),NOSPLIT|TOPFRAME,$0
	CALL	·netbsdMstart0(SB)
	RET // not reached

TEXT runtime·osyield(SB),NOSPLIT,$0
	SVC	$SYS_sched_yield
	RET

TEXT runtime·lwp_park(SB),NOSPLIT,$0
	MOVW	clockid+0(FP), R0	// arg 1 - clockid
	MOVW	flags+4(FP), R1		// arg 2 - flags
	MOVD	ts+8(FP), R2		// arg 3 - ts
	MOVW	unpark+16(FP), R3	// arg 4 - unpark
	MOVD	hint+24(FP), R4		// arg 5 - hint
	MOVD	unparkhint+32(FP), R5	// arg 6 - unparkhint
	SVC	$SYS____lwp_park60
	MOVW	R0, ret+40(FP)
	RET

TEXT runtime·lwp_unpark(SB),NOSPLIT,$0
	MOVW	lwp+0(FP), R0		// arg 1 - lwp
	MOVD	hint+8(FP), R1		// arg 2 - hint
	SVC	$SYS__lwp_unpark
	MOVW	R0, ret+16(FP)
	RET

TEXT runtime·lwp_self(SB),NOSPLIT,$0
	SVC	$SYS__lwp_self
	MOVW	R0, ret+0(FP)
	RET

// Exit the entire program (like C exit)
TEXT runtime·exit(SB),NOSPLIT,$-8
	MOVW	code+0(FP), R0		// arg 1 - exit status
	SVC	$SYS_exit
	MOVD	$0, R0			// If we're still running,
	MOVD	R0, (R0)		// crash

// func exitThread(wait *atomic.Uint32)
TEXT runtime·exitThread(SB),NOSPLIT,$0-8
	MOVD	wait+0(FP), R0
	// We're done using the stack.
	MOVW	$0, R1
	STLRW	R1, (R0)
	SVC	$SYS__lwp_exit
	JMP	0(PC)

TEXT runtime·open(SB),NOSPLIT|NOFRAME,$-8
	MOVD	name+0(FP), R0		// arg 1 - pathname
	MOVW	mode+8(FP), R1		// arg 2 - flags
	MOVW	perm+12(FP), R2		// arg 3 - mode
	SVC	$SYS_open
	BCC	ok
	MOVW	$-1, R0
ok:
	MOVW	R0, ret+16(FP)
	RET

TEXT runtime·closefd(SB),NOSPLIT,$-8
	MOVW	fd+0(FP), R0		// arg 1 - fd
	SVC	$SYS_close
	BCC	ok
	MOVW	$-1, R0
ok:
	MOVW	R0, ret+8(FP)
	RET

TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0
	MOVW	fd+0(FP), R0		// arg 1 - fd
	MOVD	p+8(FP), R1		// arg 2 - buf
	MOVW	n+16(FP), R2		// arg 3 - count
	SVC	$SYS_read
	BCC	ok
	NEG	R0, R0
ok:
	MOVW	R0, ret+24(FP)
	RET

// func pipe2(flags int32) (r, w int32, errno int32)
TEXT runtime·pipe2(SB),NOSPLIT|NOFRAME,$0-20
	ADD	$16, RSP, R0
	MOVW	flags+0(FP), R1
	SVC	$SYS_pipe2
	BCC	pipe2ok
	NEG	R0, R0
pipe2ok:
	MOVW	R0, errno+16(FP)
	RET

TEXT runtime·write1(SB),NOSPLIT,$-8
	MOVD	fd+0(FP), R0		// arg 1 - fd
	MOVD	p+8(FP), R1		// arg 2 - buf
	MOVW	n+16(FP), R2		// arg 3 - nbyte
	SVC	$SYS_write
	BCC	ok
	NEG	R0, R0
ok:
	MOVW	R0, ret+24(FP)
	RET

TEXT runtime·usleep(SB),NOSPLIT,$24-4
	MOVWU	usec+0(FP), R3
	MOVD	R3, R5
	MOVW	$1000000, R4
	UDIV	R4, R3
	MOVD	R3, 8(RSP)		// sec
	MUL	R3, R4
	SUB	R4, R5
	MOVW	$1000, R4
	MUL	R4, R5
	MOVD	R5, 16(RSP)		// nsec

	MOVD	$8(RSP), R0		// arg 1 - rqtp
	MOVD	$0, R1			// arg 2 - rmtp
	SVC	$SYS___nanosleep50
	RET

TEXT runtime·lwp_kill(SB),NOSPLIT,$0-16
	MOVW	tid+0(FP), R0		// arg 1 - target
	MOVD	sig+8(FP), R1		// arg 2 - signo
	SVC	$SYS__lwp_kill
	RET

TEXT runtime·raiseproc(SB),NOSPLIT,$16
	SVC	$SYS_getpid
					// arg 1 - pid (from getpid)
	MOVD	sig+0(FP), R1		// arg 2 - signo
	SVC	$SYS_kill
	RET

TEXT runtime·setitimer(SB),NOSPLIT,$-8
	MOVW	mode+0(FP), R0		// arg 1 - which
	MOVD	new+8(FP), R1		// arg 2 - itv
	MOVD	old+16(FP), R2		// arg 3 - oitv
	SVC	$SYS___setitimer50
	RET

// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB), NOSPLIT, $32
	MOVW	$CLOCK_REALTIME, R0	// arg 1 - clock_id
	MOVD	$8(RSP), R1		// arg 2 - tp
	SVC	$SYS___clock_gettime50

	MOVD	8(RSP), R0		// sec
	MOVD	16(RSP), R1		// nsec

	// sec is in R0, nsec in R1
	MOVD	R0, sec+0(FP)
	MOVW	R1, nsec+8(FP)
	RET

// int64 nanotime1(void) so really
// void nanotime1(int64 *nsec)
TEXT runtime·nanotime1(SB), NOSPLIT, $32
	MOVD	$CLOCK_MONOTONIC, R0	// arg 1 - clock_id
	MOVD	$8(RSP), R1		// arg 2 - tp
	SVC	$SYS___clock_gettime50
	MOVD	8(RSP), R0		// sec
	MOVD	16(RSP), R2		// nsec

	// sec is in R0, nsec in R2
	// return nsec in R2
	MOVD	$1000000000, R3
	MUL	R3, R0
	ADD	R2, R0

	MOVD	R0, ret+0(FP)
	RET

TEXT runtime·getcontext(SB),NOSPLIT,$-8
	MOVD	ctxt+0(FP), R0		// arg 1 - context
	SVC	$SYS_getcontext
	BCS	fail
	RET
fail:
	MOVD	$0, R0
	MOVD	R0, (R0)		// crash

TEXT runtime·sigprocmask(SB),NOSPLIT,$0
	MOVW	how+0(FP), R0		// arg 1 - how
	MOVD	new+8(FP), R1		// arg 2 - set
	MOVD	old+16(FP), R2		// arg 3 - oset
	SVC	$SYS___sigprocmask14
	BCS	fail
	RET
fail:
	MOVD	$0, R0
	MOVD	R0, (R0)		// crash

TEXT sigreturn_tramp<>(SB),NOSPLIT,$-8
	MOVD	g, R0
	SVC	$SYS_setcontext
	MOVD	$0, R0
	MOVD	R0, (R0)		// crash

TEXT runtime·sigaction(SB),NOSPLIT,$-8
	MOVW	sig+0(FP), R0		// arg 1 - signum
	MOVD	new+8(FP), R1		// arg 2 - nsa
	MOVD	old+16(FP), R2		// arg 3 - osa
					// arg 4 - tramp
	MOVD	$sigreturn_tramp<>(SB), R3
	MOVW	$2, R4			// arg 5 - vers
	SVC	$SYS___sigaction_sigtramp
	BCS	fail
	RET
fail:
	MOVD	$0, R0
	MOVD	R0, (R0)		// crash

// XXX ???
TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
	MOVW	sig+8(FP), R0
	MOVD	info+16(FP), R1
	MOVD	ctx+24(FP), R2
	MOVD	fn+0(FP), R11
	BL	(R11)
	RET

TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$176
	// Save callee-save registers in the case of signal forwarding.
	// Please refer to https://golang.org/issue/31827 .
	SAVE_R19_TO_R28(8*4)
	SAVE_F8_TO_F15(8*14)
	// Unclobber g for now (kernel uses it as ucontext ptr)
	// See https://github.com/golang/go/issues/30824#issuecomment-492772426
	// This is only correct in the non-cgo case.
	// XXX should use lwp_getprivate as suggested.
	// 8*36 is ucontext.uc_mcontext.__gregs[_REG_X28]
	MOVD	8*36(g), g

	// this might be called in external code context,
	// where g is not set.
	// first save R0, because runtime·load_g will clobber it
	MOVD	R0, 8(RSP)		// signum
	MOVB	runtime·iscgo(SB), R0
	CMP 	$0, R0
	// XXX branch destination
	BEQ	2(PC)
	BL	runtime·load_g(SB)

	// Restore signum to R0.
	MOVW	8(RSP), R0
	// R1 and R2 already contain info and ctx, respectively.
	BL	runtime·sigtrampgo<ABIInternal>(SB)

	// Restore callee-save registers.
	RESTORE_R19_TO_R28(8*4)
	RESTORE_F8_TO_F15(8*14)

	RET

TEXT runtime·mmap(SB),NOSPLIT,$0
	MOVD	addr+0(FP), R0		// arg 1 - addr
	MOVD	n+8(FP), R1		// arg 2 - len
	MOVW	prot+16(FP), R2		// arg 3 - prot
	MOVW	flags+20(FP), R3	// arg 4 - flags
	MOVW	fd+24(FP), R4		// arg 5 - fd
	MOVW	$0, R5			// arg 6 - pad
	MOVD	off+28(FP), R6		// arg 7 - offset
	SVC	$SYS_mmap
	BCS	fail
	MOVD	R0, p+32(FP)
	MOVD	$0, err+40(FP)
	RET
fail:
	MOVD	$0, p+32(FP)
	MOVD	R0, err+40(FP)
	RET

TEXT runtime·munmap(SB),NOSPLIT,$0
	MOVD	addr+0(FP), R0	// arg 1 - addr
	MOVD	n+8(FP), R1	// arg 2 - len
	SVC	$SYS_munmap
	BCS	fail
	RET
fail:
	MOVD	$0, R0
	MOVD	R0, (R0)	// crash

TEXT runtime·madvise(SB),NOSPLIT,$0
	MOVD	addr+0(FP), R0		// arg 1 - addr
	MOVD	n+8(FP), R1		// arg 2 - len
	MOVW	flags+16(FP), R2	// arg 3 - behav
	SVC	$SYS_madvise
	BCC	ok
	MOVD	$-1, R0
ok:
	MOVD	R0, ret+24(FP)
	RET

TEXT runtime·sigaltstack(SB),NOSPLIT,$0
	MOVD	new+0(FP), R0		// arg 1 - nss
	MOVD	old+8(FP), R1		// arg 2 - oss
	SVC	$SYS___sigaltstack14
	BCS	fail
	RET
fail:
	MOVD	$0, R0
	MOVD	R0, (R0)		// crash

TEXT runtime·sysctl(SB),NOSPLIT,$0
	MOVD	mib+0(FP), R0		// arg 1 - name
	MOVW	miblen+8(FP), R1	// arg 2 - namelen
	MOVD	out+16(FP), R2		// arg 3 - oldp
	MOVD	size+24(FP), R3		// arg 4 - oldlenp
	MOVD	dst+32(FP), R4		// arg 5 - newp
	MOVD	ndst+40(FP), R5		// arg 6 - newlen
	SVC	$SYS___sysctl
	BCC	ok
	NEG	R0, R0
ok:
	MOVW	R0, ret+48(FP)
	RET

// int32 runtime·kqueue(void)
TEXT runtime·kqueue(SB),NOSPLIT,$0
	MOVD	$0, R0
	SVC	$SYS_kqueue
	BCC	ok
	NEG	R0, R0
ok:
	MOVW	R0, 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), R0	// arg 1 - kq
	MOVD	ch+8(FP), R1	// arg 2 - changelist
	MOVW	nch+16(FP), R2	// arg 3 - nchanges
	MOVD	ev+24(FP), R3	// arg 4 - eventlist
	MOVW	nev+32(FP), R4	// arg 5 - nevents
	MOVD	ts+40(FP), R5	// arg 6 - timeout
	SVC	$SYS___kevent50
	BCC	ok
	NEG	R0, R0
ok:
	MOVW	R0, ret+48(FP)
	RET

// func fcntl(fd, cmd, arg int32) (int32, int32)
TEXT runtime·fcntl(SB),NOSPLIT,$0
	MOVW	fd+0(FP), R0	// fd
	MOVW	cmd+4(FP), R1	// cmd
	MOVW	arg+8(FP), R2	// arg
	SVC	$SYS_fcntl
	BCC	noerr
	MOVW	$-1, R1
	MOVW	R1, ret+16(FP)
	MOVW	R0, errno+20(FP)
	RET
noerr:
	MOVW	R0, ret+16(FP)
	MOVW	$0, errno+20(FP)
	RET

// func issetugid() int32
TEXT runtime·issetugid(SB),NOSPLIT|NOFRAME,$0
	SVC $SYS_issetugid
	MOVW	R0, ret+0(FP)
	RET