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
|
// Copyright 2009 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 AMD64, OpenBSD
// /usr/src/sys/kern/syscalls.master for syscall numbers.
//
#include "zasm_GOOS_GOARCH.h"
#include "../../cmd/ld/textflag.h"
#define CLOCK_MONOTONIC $3
// int64 tfork(void *param, uintptr psize, M *mp, G *gp, void (*fn)(void));
TEXT runtime·tfork(SB),NOSPLIT,$32
// Copy mp, gp and fn off parent stack for use by child.
MOVQ mm+16(FP), R8
MOVQ gg+24(FP), R9
MOVQ fn+32(FP), R12
MOVQ param+0(FP), DI
MOVQ psize+8(FP), SI
MOVL $8, AX // sys___tfork
SYSCALL
// Return if tfork syscall failed.
JCC 3(PC)
NEGQ AX
RET
// In parent, return.
CMPL AX, $0
JEQ 2(PC)
RET
// Set FS to point at m->tls.
LEAQ m_tls(R8), DI
CALL runtime·settls(SB)
// In child, set up new stack.
get_tls(CX)
MOVQ R8, m(CX)
MOVQ R9, g(CX)
CALL runtime·stackcheck(SB)
// Call fn
CALL R12
// It shouldn't return. If it does, exit
MOVQ $0, DI // arg 1 - notdead
MOVL $302, AX // sys___threxit
SYSCALL
JMP -3(PC) // keep exiting
TEXT runtime·osyield(SB),NOSPLIT,$0
MOVL $298, AX // sys_sched_yield
SYSCALL
RET
TEXT runtime·thrsleep(SB),NOSPLIT,$0
MOVQ 8(SP), DI // arg 1 - ident
MOVL 16(SP), SI // arg 2 - clock_id
MOVQ 24(SP), DX // arg 3 - tp
MOVQ 32(SP), R10 // arg 4 - lock
MOVQ 40(SP), R8 // arg 5 - abort
MOVL $94, AX // sys___thrsleep
SYSCALL
RET
TEXT runtime·thrwakeup(SB),NOSPLIT,$0
MOVQ 8(SP), DI // arg 1 - ident
MOVL 16(SP), SI // arg 2 - n
MOVL $301, AX // sys___thrwakeup
SYSCALL
RET
// Exit the entire program (like C exit)
TEXT runtime·exit(SB),NOSPLIT,$-8
MOVL 8(SP), DI // arg 1 - exit status
MOVL $1, AX // sys_exit
SYSCALL
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·exit1(SB),NOSPLIT,$-8
MOVQ $0, DI // arg 1 - notdead
MOVL $302, AX // sys___threxit
SYSCALL
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·open(SB),NOSPLIT,$-8
MOVQ 8(SP), DI // arg 1 pathname
MOVL 16(SP), SI // arg 2 flags
MOVL 20(SP), DX // arg 3 mode
MOVL $5, AX
SYSCALL
RET
TEXT runtime·close(SB),NOSPLIT,$-8
MOVL 8(SP), DI // arg 1 fd
MOVL $6, AX
SYSCALL
RET
TEXT runtime·read(SB),NOSPLIT,$-8
MOVL 8(SP), DI // arg 1 fd
MOVQ 16(SP), SI // arg 2 buf
MOVL 24(SP), DX // arg 3 count
MOVL $3, AX
SYSCALL
RET
TEXT runtime·write(SB),NOSPLIT,$-8
MOVL 8(SP), DI // arg 1 - fd
MOVQ 16(SP), SI // arg 2 - buf
MOVL 24(SP), DX // arg 3 - nbyte
MOVL $4, AX // sys_write
SYSCALL
RET
TEXT runtime·usleep(SB),NOSPLIT,$16
MOVL $0, DX
MOVL usec+0(FP), AX
MOVL $1000000, CX
DIVL CX
MOVQ AX, 0(SP) // tv_sec
MOVL $1000, AX
MULL DX
MOVQ AX, 8(SP) // tv_nsec
MOVQ SP, DI // arg 1 - rqtp
MOVQ $0, SI // arg 2 - rmtp
MOVL $91, AX // sys_nanosleep
SYSCALL
RET
TEXT runtime·raise(SB),NOSPLIT,$16
MOVL $299, AX // sys_getthrid
SYSCALL
MOVQ AX, DI // arg 1 - pid
MOVL sig+0(FP), SI // arg 2 - signum
MOVL $37, AX // sys_kill
SYSCALL
RET
TEXT runtime·setitimer(SB),NOSPLIT,$-8
MOVL 8(SP), DI // arg 1 - which
MOVQ 16(SP), SI // arg 2 - itv
MOVQ 24(SP), DX // arg 3 - oitv
MOVL $69, AX // sys_setitimer
SYSCALL
RET
// func now() (sec int64, nsec int32)
TEXT time·now(SB), NOSPLIT, $32
MOVQ $0, DI // arg 1 - clock_id
LEAQ 8(SP), SI // arg 2 - tp
MOVL $87, AX // sys_clock_gettime
SYSCALL
MOVQ 8(SP), AX // sec
MOVQ 16(SP), DX // nsec
// sec is in AX, nsec in DX
MOVQ AX, sec+0(FP)
MOVL DX, nsec+8(FP)
RET
TEXT runtime·nanotime(SB),NOSPLIT,$24
MOVQ CLOCK_MONOTONIC, DI // arg 1 - clock_id
LEAQ 8(SP), SI // arg 2 - tp
MOVL $87, AX // sys_clock_gettime
SYSCALL
MOVQ 8(SP), AX // sec
MOVQ 16(SP), DX // nsec
// sec is in AX, nsec in DX
// return nsec in AX
IMULQ $1000000000, AX
ADDQ DX, AX
RET
TEXT runtime·sigaction(SB),NOSPLIT,$-8
MOVL 8(SP), DI // arg 1 - signum
MOVQ 16(SP), SI // arg 2 - nsa
MOVQ 24(SP), DX // arg 3 - osa
MOVL $46, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigprocmask(SB),NOSPLIT,$0
MOVL 8(SP), DI // arg 1 - how
MOVL 12(SP), SI // arg 2 - set
MOVL $48, AX // sys_sigprocmask
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
MOVL AX, oset+0(FP) // Return oset
RET
TEXT runtime·sigtramp(SB),NOSPLIT,$64
get_tls(BX)
// check that m exists
MOVQ m(BX), BP
CMPQ BP, $0
JNE 5(PC)
MOVQ DI, 0(SP)
MOVQ $runtime·badsignal(SB), AX
CALL AX
RET
// save g
MOVQ g(BX), R10
MOVQ R10, 40(SP)
// g = m->signal
MOVQ m_gsignal(BP), BP
MOVQ BP, g(BX)
MOVQ DI, 0(SP)
MOVQ SI, 8(SP)
MOVQ DX, 16(SP)
MOVQ R10, 24(SP)
CALL runtime·sighandler(SB)
// restore g
get_tls(BX)
MOVQ 40(SP), R10
MOVQ R10, g(BX)
RET
TEXT runtime·mmap(SB),NOSPLIT,$0
MOVQ 8(SP), DI // arg 1 - addr
MOVQ 16(SP), SI // arg 2 - len
MOVL 24(SP), DX // arg 3 - prot
MOVL 28(SP), R10 // arg 4 - flags
MOVL 32(SP), R8 // arg 5 - fd
MOVQ 36(SP), R9
SUBQ $16, SP
MOVQ R9, 8(SP) // arg 7 - offset (passed on stack)
MOVQ $0, R9 // arg 6 - pad
MOVL $197, AX
SYSCALL
ADDQ $16, SP
RET
TEXT runtime·munmap(SB),NOSPLIT,$0
MOVQ 8(SP), DI // arg 1 - addr
MOVQ 16(SP), SI // arg 2 - len
MOVL $73, AX // sys_munmap
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·madvise(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI // arg 1 - addr
MOVQ len+8(FP), SI // arg 2 - len
MOVQ behav+16(FP), DX // arg 3 - behav
MOVQ $75, AX // sys_madvise
SYSCALL
// ignore failure - maybe pages are locked
RET
TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
MOVQ new+8(SP), DI // arg 1 - nss
MOVQ old+16(SP), SI // arg 2 - oss
MOVQ $288, AX // sys_sigaltstack
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
// set tls base to DI
TEXT runtime·settls(SB),NOSPLIT,$0
// adjust for ELF: wants to use -16(FS) and -8(FS) for g and m
ADDQ $16, DI
MOVQ $329, AX // sys___settcb
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sysctl(SB),NOSPLIT,$0
MOVQ 8(SP), DI // arg 1 - name
MOVL 16(SP), SI // arg 2 - namelen
MOVQ 24(SP), DX // arg 3 - oldp
MOVQ 32(SP), R10 // arg 4 - oldlenp
MOVQ 40(SP), R8 // arg 5 - newp
MOVQ 48(SP), R9 // arg 6 - newlen
MOVQ $202, AX // sys___sysctl
SYSCALL
JCC 3(PC)
NEGQ AX
RET
MOVL $0, AX
RET
// int32 runtime·kqueue(void);
TEXT runtime·kqueue(SB),NOSPLIT,$0
MOVQ $0, DI
MOVQ $0, SI
MOVQ $0, DX
MOVL $269, AX
SYSCALL
JCC 2(PC)
NEGQ AX
RET
// int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout);
TEXT runtime·kevent(SB),NOSPLIT,$0
MOVL 8(SP), DI
MOVQ 16(SP), SI
MOVL 24(SP), DX
MOVQ 32(SP), R10
MOVL 40(SP), R8
MOVQ 48(SP), R9
MOVL $72, AX
SYSCALL
JCC 2(PC)
NEGQ AX
RET
// void runtime·closeonexec(int32 fd);
TEXT runtime·closeonexec(SB),NOSPLIT,$0
MOVL 8(SP), DI // fd
MOVQ $2, SI // F_SETFD
MOVQ $1, DX // FD_CLOEXEC
MOVL $92, AX // fcntl
SYSCALL
RET
|
