Text file
src/runtime/sys_netbsd_amd64.s
Documentation: runtime
1// Copyright 2009 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// System calls and other sys.stuff for AMD64, NetBSD
6// /usr/src/sys/kern/syscalls.master for syscall numbers.
7//
8
9#include "go_asm.h"
10#include "go_tls.h"
11#include "textflag.h"
12#include "cgo/abi_amd64.h"
13
14#define CLOCK_REALTIME 0
15#define CLOCK_MONOTONIC 3
16
17#define SYS_exit 1
18#define SYS_read 3
19#define SYS_write 4
20#define SYS_open 5
21#define SYS_close 6
22#define SYS_getpid 20
23#define SYS_kill 37
24#define SYS_munmap 73
25#define SYS_madvise 75
26#define SYS_fcntl 92
27#define SYS_mmap 197
28#define SYS___sysctl 202
29#define SYS___sigaltstack14 281
30#define SYS___sigprocmask14 293
31#define SYS_issetugid 305
32#define SYS_getcontext 307
33#define SYS_setcontext 308
34#define SYS__lwp_create 309
35#define SYS__lwp_exit 310
36#define SYS__lwp_self 311
37#define SYS__lwp_setprivate 317
38#define SYS__lwp_kill 318
39#define SYS__lwp_unpark 321
40#define SYS___sigaction_sigtramp 340
41#define SYS_kqueue 344
42#define SYS_sched_yield 350
43#define SYS___setitimer50 425
44#define SYS___clock_gettime50 427
45#define SYS___nanosleep50 430
46#define SYS___kevent50 435
47#define SYS____lwp_park60 478
48
49// int32 lwp_create(void *context, uintptr flags, void *lwpid)
50TEXT runtime·lwp_create(SB),NOSPLIT,$0
51 MOVQ ctxt+0(FP), DI
52 MOVQ flags+8(FP), SI
53 MOVQ lwpid+16(FP), DX
54 MOVL $SYS__lwp_create, AX
55 SYSCALL
56 JCC 2(PC)
57 NEGQ AX
58 MOVL AX, ret+24(FP)
59 RET
60
61TEXT runtime·lwp_tramp(SB),NOSPLIT,$0
62
63 // Set FS to point at m->tls.
64 LEAQ m_tls(R8), DI
65 CALL runtime·settls(SB)
66
67 // Set up new stack.
68 get_tls(CX)
69 MOVQ R8, g_m(R9)
70 MOVQ R9, g(CX)
71 CALL runtime·stackcheck(SB)
72
73 // Call fn. This is an ABI0 PC.
74 CALL R12
75
76 // It shouldn't return. If it does, exit.
77 MOVL $SYS__lwp_exit, AX
78 SYSCALL
79 JMP -3(PC) // keep exiting
80
81TEXT ·netbsdMstart(SB),NOSPLIT|TOPFRAME,$0
82 CALL ·netbsdMstart0(SB)
83 RET // not reached
84
85TEXT runtime·osyield(SB),NOSPLIT,$0
86 MOVL $SYS_sched_yield, AX
87 SYSCALL
88 RET
89
90TEXT runtime·lwp_park(SB),NOSPLIT,$0
91 MOVL clockid+0(FP), DI // arg 1 - clockid
92 MOVL flags+4(FP), SI // arg 2 - flags
93 MOVQ ts+8(FP), DX // arg 3 - ts
94 MOVL unpark+16(FP), R10 // arg 4 - unpark
95 MOVQ hint+24(FP), R8 // arg 5 - hint
96 MOVQ unparkhint+32(FP), R9 // arg 6 - unparkhint
97 MOVL $SYS____lwp_park60, AX
98 SYSCALL
99 MOVL AX, ret+40(FP)
100 RET
101
102TEXT runtime·lwp_unpark(SB),NOSPLIT,$0
103 MOVL lwp+0(FP), DI // arg 1 - lwp
104 MOVQ hint+8(FP), SI // arg 2 - hint
105 MOVL $SYS__lwp_unpark, AX
106 SYSCALL
107 MOVL AX, ret+16(FP)
108 RET
109
110TEXT runtime·lwp_self(SB),NOSPLIT,$0
111 MOVL $SYS__lwp_self, AX
112 SYSCALL
113 MOVL AX, ret+0(FP)
114 RET
115
116// Exit the entire program (like C exit)
117TEXT runtime·exit(SB),NOSPLIT,$-8
118 MOVL code+0(FP), DI // arg 1 - exit status
119 MOVL $SYS_exit, AX
120 SYSCALL
121 MOVL $0xf1, 0xf1 // crash
122 RET
123
124// func exitThread(wait *atomic.Uint32)
125TEXT runtime·exitThread(SB),NOSPLIT,$0-8
126 MOVQ wait+0(FP), AX
127 // We're done using the stack.
128 MOVL $0, (AX)
129 MOVL $SYS__lwp_exit, AX
130 SYSCALL
131 MOVL $0xf1, 0xf1 // crash
132 JMP 0(PC)
133
134TEXT runtime·open(SB),NOSPLIT,$-8
135 MOVQ name+0(FP), DI // arg 1 pathname
136 MOVL mode+8(FP), SI // arg 2 flags
137 MOVL perm+12(FP), DX // arg 3 mode
138 MOVL $SYS_open, AX
139 SYSCALL
140 JCC 2(PC)
141 MOVL $-1, AX
142 MOVL AX, ret+16(FP)
143 RET
144
145TEXT runtime·closefd(SB),NOSPLIT,$-8
146 MOVL fd+0(FP), DI // arg 1 fd
147 MOVL $SYS_close, AX
148 SYSCALL
149 JCC 2(PC)
150 MOVL $-1, AX
151 MOVL AX, ret+8(FP)
152 RET
153
154TEXT runtime·read(SB),NOSPLIT,$-8
155 MOVL fd+0(FP), DI // arg 1 fd
156 MOVQ p+8(FP), SI // arg 2 buf
157 MOVL n+16(FP), DX // arg 3 count
158 MOVL $SYS_read, AX
159 SYSCALL
160 JCC 2(PC)
161 NEGQ AX // caller expects negative errno
162 MOVL AX, ret+24(FP)
163 RET
164
165// func pipe2(flags int32) (r, w int32, errno int32)
166TEXT runtime·pipe2(SB),NOSPLIT,$0-20
167 LEAQ r+8(FP), DI
168 MOVL flags+0(FP), SI
169 MOVL $453, AX
170 SYSCALL
171 MOVL AX, errno+16(FP)
172 RET
173
174TEXT runtime·write1(SB),NOSPLIT,$-8
175 MOVQ fd+0(FP), DI // arg 1 - fd
176 MOVQ p+8(FP), SI // arg 2 - buf
177 MOVL n+16(FP), DX // arg 3 - nbyte
178 MOVL $SYS_write, AX
179 SYSCALL
180 JCC 2(PC)
181 NEGQ AX // caller expects negative errno
182 MOVL AX, ret+24(FP)
183 RET
184
185TEXT runtime·usleep(SB),NOSPLIT,$16
186 MOVL $0, DX
187 MOVL usec+0(FP), AX
188 MOVL $1000000, CX
189 DIVL CX
190 MOVQ AX, 0(SP) // tv_sec
191 MOVL $1000, AX
192 MULL DX
193 MOVQ AX, 8(SP) // tv_nsec
194
195 MOVQ SP, DI // arg 1 - rqtp
196 MOVQ $0, SI // arg 2 - rmtp
197 MOVL $SYS___nanosleep50, AX
198 SYSCALL
199 RET
200
201TEXT runtime·lwp_kill(SB),NOSPLIT,$0-16
202 MOVL tid+0(FP), DI // arg 1 - target
203 MOVQ sig+8(FP), SI // arg 2 - signo
204 MOVL $SYS__lwp_kill, AX
205 SYSCALL
206 RET
207
208TEXT runtime·raiseproc(SB),NOSPLIT,$16
209 MOVL $SYS_getpid, AX
210 SYSCALL
211 MOVQ AX, DI // arg 1 - pid
212 MOVL sig+0(FP), SI // arg 2 - signo
213 MOVL $SYS_kill, AX
214 SYSCALL
215 RET
216
217TEXT runtime·setitimer(SB),NOSPLIT,$-8
218 MOVL mode+0(FP), DI // arg 1 - which
219 MOVQ new+8(FP), SI // arg 2 - itv
220 MOVQ old+16(FP), DX // arg 3 - oitv
221 MOVL $SYS___setitimer50, AX
222 SYSCALL
223 RET
224
225// func walltime() (sec int64, nsec int32)
226TEXT runtime·walltime(SB), NOSPLIT, $32
227 MOVQ $CLOCK_REALTIME, DI // arg 1 - clock_id
228 LEAQ 8(SP), SI // arg 2 - tp
229 MOVL $SYS___clock_gettime50, AX
230 SYSCALL
231 MOVQ 8(SP), AX // sec
232 MOVQ 16(SP), DX // nsec
233
234 // sec is in AX, nsec in DX
235 MOVQ AX, sec+0(FP)
236 MOVL DX, nsec+8(FP)
237 RET
238
239TEXT runtime·nanotime1(SB),NOSPLIT,$32
240 MOVQ $CLOCK_MONOTONIC, DI // arg 1 - clock_id
241 LEAQ 8(SP), SI // arg 2 - tp
242 MOVL $SYS___clock_gettime50, AX
243 SYSCALL
244 MOVQ 8(SP), AX // sec
245 MOVQ 16(SP), DX // nsec
246
247 // sec is in AX, nsec in DX
248 // return nsec in AX
249 IMULQ $1000000000, AX
250 ADDQ DX, AX
251 MOVQ AX, ret+0(FP)
252 RET
253
254TEXT runtime·getcontext(SB),NOSPLIT,$-8
255 MOVQ ctxt+0(FP), DI // arg 1 - context
256 MOVL $SYS_getcontext, AX
257 SYSCALL
258 JCC 2(PC)
259 MOVL $0xf1, 0xf1 // crash
260 RET
261
262TEXT runtime·sigprocmask(SB),NOSPLIT,$0
263 MOVL how+0(FP), DI // arg 1 - how
264 MOVQ new+8(FP), SI // arg 2 - set
265 MOVQ old+16(FP), DX // arg 3 - oset
266 MOVL $SYS___sigprocmask14, AX
267 SYSCALL
268 JCC 2(PC)
269 MOVL $0xf1, 0xf1 // crash
270 RET
271
272TEXT sigreturn_tramp<>(SB),NOSPLIT,$-8
273 MOVQ R15, DI // Load address of ucontext
274 MOVQ $SYS_setcontext, AX
275 SYSCALL
276 MOVQ $-1, DI // Something failed...
277 MOVL $SYS_exit, AX
278 SYSCALL
279
280TEXT runtime·sigaction(SB),NOSPLIT,$-8
281 MOVL sig+0(FP), DI // arg 1 - signum
282 MOVQ new+8(FP), SI // arg 2 - nsa
283 MOVQ old+16(FP), DX // arg 3 - osa
284 // arg 4 - tramp
285 LEAQ sigreturn_tramp<>(SB), R10
286 MOVQ $2, R8 // arg 5 - vers
287 MOVL $SYS___sigaction_sigtramp, AX
288 SYSCALL
289 JCC 2(PC)
290 MOVL $0xf1, 0xf1 // crash
291 RET
292
293TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
294 MOVQ fn+0(FP), AX
295 MOVL sig+8(FP), DI
296 MOVQ info+16(FP), SI
297 MOVQ ctx+24(FP), DX
298 MOVQ SP, BX // callee-saved
299 ANDQ $~15, SP // alignment for x86_64 ABI
300 CALL AX
301 MOVQ BX, SP
302 RET
303
304// Called using C ABI.
305TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME|NOFRAME,$0
306 // Transition from C ABI to Go ABI.
307 PUSH_REGS_HOST_TO_ABI0()
308
309 // Set up ABIInternal environment: g in R14, cleared X15.
310 get_tls(R12)
311 MOVQ g(R12), R14
312 PXOR X15, X15
313
314 // Reserve space for spill slots.
315 NOP SP // disable vet stack checking
316 ADJSP $24
317
318 // Call into the Go signal handler
319 MOVQ DI, AX // sig
320 MOVQ SI, BX // info
321 MOVQ DX, CX // ctx
322 CALL ·sigtrampgo<ABIInternal>(SB)
323
324 ADJSP $-24
325
326 POP_REGS_HOST_TO_ABI0()
327 RET
328
329TEXT runtime·mmap(SB),NOSPLIT,$0
330 MOVQ addr+0(FP), DI // arg 1 - addr
331 MOVQ n+8(FP), SI // arg 2 - len
332 MOVL prot+16(FP), DX // arg 3 - prot
333 MOVL flags+20(FP), R10 // arg 4 - flags
334 MOVL fd+24(FP), R8 // arg 5 - fd
335 MOVL off+28(FP), R9
336 SUBQ $16, SP
337 MOVQ R9, 8(SP) // arg 7 - offset (passed on stack)
338 MOVQ $0, R9 // arg 6 - pad
339 MOVL $SYS_mmap, AX
340 SYSCALL
341 JCC ok
342 ADDQ $16, SP
343 MOVQ $0, p+32(FP)
344 MOVQ AX, err+40(FP)
345 RET
346ok:
347 ADDQ $16, SP
348 MOVQ AX, p+32(FP)
349 MOVQ $0, err+40(FP)
350 RET
351
352TEXT runtime·munmap(SB),NOSPLIT,$0
353 MOVQ addr+0(FP), DI // arg 1 - addr
354 MOVQ n+8(FP), SI // arg 2 - len
355 MOVL $SYS_munmap, AX
356 SYSCALL
357 JCC 2(PC)
358 MOVL $0xf1, 0xf1 // crash
359 RET
360
361
362TEXT runtime·madvise(SB),NOSPLIT,$0
363 MOVQ addr+0(FP), DI // arg 1 - addr
364 MOVQ n+8(FP), SI // arg 2 - len
365 MOVL flags+16(FP), DX // arg 3 - behav
366 MOVQ $SYS_madvise, AX
367 SYSCALL
368 JCC 2(PC)
369 MOVL $-1, AX
370 MOVL AX, ret+24(FP)
371 RET
372
373TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
374 MOVQ new+0(FP), DI // arg 1 - nss
375 MOVQ old+8(FP), SI // arg 2 - oss
376 MOVQ $SYS___sigaltstack14, AX
377 SYSCALL
378 JCC 2(PC)
379 MOVL $0xf1, 0xf1 // crash
380 RET
381
382// set tls base to DI
383TEXT runtime·settls(SB),NOSPLIT,$8
384 // adjust for ELF: wants to use -8(FS) for g
385 ADDQ $8, DI // arg 1 - ptr
386 MOVQ $SYS__lwp_setprivate, AX
387 SYSCALL
388 JCC 2(PC)
389 MOVL $0xf1, 0xf1 // crash
390 RET
391
392TEXT runtime·sysctl(SB),NOSPLIT,$0
393 MOVQ mib+0(FP), DI // arg 1 - name
394 MOVL miblen+8(FP), SI // arg 2 - namelen
395 MOVQ out+16(FP), DX // arg 3 - oldp
396 MOVQ size+24(FP), R10 // arg 4 - oldlenp
397 MOVQ dst+32(FP), R8 // arg 5 - newp
398 MOVQ ndst+40(FP), R9 // arg 6 - newlen
399 MOVQ $SYS___sysctl, AX
400 SYSCALL
401 JCC 4(PC)
402 NEGQ AX
403 MOVL AX, ret+48(FP)
404 RET
405 MOVL $0, AX
406 MOVL AX, ret+48(FP)
407 RET
408
409// int32 runtime·kqueue(void)
410TEXT runtime·kqueue(SB),NOSPLIT,$0
411 MOVQ $0, DI
412 MOVL $SYS_kqueue, AX
413 SYSCALL
414 JCC 2(PC)
415 NEGQ AX
416 MOVL AX, ret+0(FP)
417 RET
418
419// int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout)
420TEXT runtime·kevent(SB),NOSPLIT,$0
421 MOVL kq+0(FP), DI
422 MOVQ ch+8(FP), SI
423 MOVL nch+16(FP), DX
424 MOVQ ev+24(FP), R10
425 MOVL nev+32(FP), R8
426 MOVQ ts+40(FP), R9
427 MOVL $SYS___kevent50, AX
428 SYSCALL
429 JCC 2(PC)
430 NEGQ AX
431 MOVL AX, ret+48(FP)
432 RET
433
434// func fcntl(fd, cmd, arg int32) (int32, int32)
435TEXT runtime·fcntl(SB),NOSPLIT,$0
436 MOVL fd+0(FP), DI // fd
437 MOVL cmd+4(FP), SI // cmd
438 MOVL arg+8(FP), DX // arg
439 MOVL $SYS_fcntl, AX
440 SYSCALL
441 JCC noerr
442 MOVL $-1, ret+16(FP)
443 MOVL AX, errno+20(FP)
444 RET
445noerr:
446 MOVL AX, ret+16(FP)
447 MOVL $0, errno+20(FP)
448 RET
449
450// func issetugid() int32
451TEXT runtime·issetugid(SB),NOSPLIT,$0
452 MOVQ $0, DI
453 MOVQ $0, SI
454 MOVQ $0, DX
455 MOVL $SYS_issetugid, AX
456 SYSCALL
457 MOVL AX, ret+0(FP)
458 RET
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