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
|
// 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, FreeBSD
// /usr/src/sys/kern/syscalls.master for syscall numbers.
//
#include "zasm_GOOS_GOARCH.h"
#include "textflag.h"
TEXT runtime·sys_umtx_sleep(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI // arg 1 - ptr
MOVL val+8(FP), SI // arg 2 - value
MOVL timeout+12(FP), DX // arg 3 - timeout
MOVL $469, AX // umtx_sleep
SYSCALL
JCC 2(PC)
NEGQ AX
MOVL AX, ret+16(FP)
RET
TEXT runtime·sys_umtx_wakeup(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI // arg 1 - ptr
MOVL val+8(FP), SI // arg 2 - count
MOVL $470, AX // umtx_wakeup
SYSCALL
JCC 2(PC)
NEGQ AX
MOVL AX, ret+16(FP)
RET
TEXT runtime·lwp_create(SB),NOSPLIT,$0
MOVQ param+0(FP), DI // arg 1 - params
MOVL $495, AX // lwp_create
SYSCALL
MOVL AX, ret+8(FP)
RET
TEXT runtime·lwp_start(SB),NOSPLIT,$0
MOVQ DI, R13 // m
// set up FS to point at m->tls
LEAQ m_tls(R13), DI
CALL runtime·settls(SB) // smashes DI
// set up m, g
get_tls(CX)
MOVQ m_g0(R13), DI
MOVQ R13, g_m(DI)
MOVQ DI, g(CX)
CALL runtime·stackcheck(SB)
CALL runtime·mstart(SB)
MOVQ 0, AX // crash (not reached)
// Exit the entire program (like C exit)
TEXT runtime·exit(SB),NOSPLIT,$-8
MOVL code+0(FP), DI // arg 1 exit status
MOVL $1, AX
SYSCALL
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·exit1(SB),NOSPLIT,$-8
MOVL code+0(FP), DI // arg 1 exit status
MOVL $431, AX
SYSCALL
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·open(SB),NOSPLIT,$-8
MOVQ name+0(FP), DI // arg 1 pathname
MOVL mode+8(FP), SI // arg 2 flags
MOVL perm+12(FP), DX // arg 3 mode
MOVL $5, AX
SYSCALL
MOVL AX, ret+16(FP)
RET
TEXT runtime·close(SB),NOSPLIT,$-8
MOVL fd+0(FP), DI // arg 1 fd
MOVL $6, AX
SYSCALL
MOVL AX, ret+8(FP)
RET
TEXT runtime·read(SB),NOSPLIT,$-8
MOVL fd+0(FP), DI // arg 1 fd
MOVQ p+8(FP), SI // arg 2 buf
MOVL n+16(FP), DX // arg 3 count
MOVL $3, AX
SYSCALL
MOVL AX, ret+24(FP)
RET
TEXT runtime·write(SB),NOSPLIT,$-8
MOVQ fd+0(FP), DI // arg 1 fd
MOVQ p+8(FP), SI // arg 2 buf
MOVL n+16(FP), DX // arg 3 count
MOVL $4, AX
SYSCALL
MOVL AX, ret+24(FP)
RET
TEXT runtime·getrlimit(SB),NOSPLIT,$-8
MOVL kind+0(FP), DI
MOVQ limit+8(FP), SI
MOVL $194, AX
SYSCALL
MOVL AX, ret+16(FP)
RET
TEXT runtime·raise(SB),NOSPLIT,$16
MOVL $496, AX // lwp_gettid
SYSCALL
MOVQ $-1, DI // arg 1 - pid
MOVQ 8(SP), DI // arg 2 - tid
MOVL sig+0(FP), SI // arg 3 - signum
MOVL $497, AX // lwp_kill
SYSCALL
RET
TEXT runtime·setitimer(SB), NOSPLIT, $-8
MOVL mode+0(FP), DI
MOVQ new+8(FP), SI
MOVQ old+16(FP), DX
MOVL $83, AX
SYSCALL
RET
// func now() (sec int64, nsec int32)
TEXT time·now(SB), NOSPLIT, $32
MOVL $232, AX
MOVQ $0, DI // CLOCK_REALTIME
LEAQ 8(SP), SI
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, $32
MOVL $232, AX
MOVQ $4, DI // CLOCK_MONOTONIC
LEAQ 8(SP), SI
SYSCALL
MOVQ 8(SP), AX // sec
MOVQ 16(SP), DX // nsec
// sec is in AX, nsec in DX
// return nsec in AX
IMULQ $1000000000, AX
ADDQ DX, AX
MOVQ AX, ret+0(FP)
RET
TEXT runtime·sigaction(SB),NOSPLIT,$-8
MOVL sig+0(FP), DI // arg 1 sig
MOVQ new+8(FP), SI // arg 2 act
MOVQ old+16(FP), DX // arg 3 oact
MOVL $342, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigtramp(SB),NOSPLIT,$64
get_tls(BX)
// check that g exists
MOVQ g(BX), R10
CMPQ R10, $0
JNE 5(PC)
MOVQ DI, 0(SP)
MOVQ $runtime·badsignal(SB), AX
CALL AX
RET
// save g
MOVQ R10, 40(SP)
// g = m->signal
MOVQ g_m(R10), BP
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 addr+0(FP), DI // arg 1 - addr
MOVQ n+8(FP), SI // arg 2 - len
MOVL prot+16(FP), DX // arg 3 - prot
MOVL flags+20(FP), R10 // arg 4 - flags
MOVL fd+24(FP), R8 // arg 5 - fd
MOVL off+28(FP), 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
MOVQ AX, ret+32(FP)
RET
TEXT runtime·munmap(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI // arg 1 addr
MOVQ n+8(FP), SI // arg 2 len
MOVL $73, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·madvise(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI
MOVQ n+8(FP), SI
MOVL flags+16(FP), DX
MOVQ $75, AX // madvise
SYSCALL
// ignore failure - maybe pages are locked
RET
TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
MOVQ new+8(SP), DI
MOVQ old+16(SP), SI
MOVQ $53, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
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 $240, AX // sys_nanosleep
SYSCALL
RET
// set tls base to DI
TEXT runtime·settls(SB),NOSPLIT,$16
ADDQ $16, DI // adjust for ELF: wants to use -16(FS) and -8(FS) for g and m
MOVQ DI, 0(SP)
MOVQ $16, 8(SP)
MOVQ $0, DI // arg 1 - which
MOVQ SP, SI // arg 2 - tls_info
MOVQ $16, DX // arg 3 - infosize
MOVQ $472, AX // set_tls_area
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sysctl(SB),NOSPLIT,$0
MOVQ mib+0(FP), DI // arg 1 - name
MOVL miblen+8(FP), SI // arg 2 - namelen
MOVQ out+16(FP), DX // arg 3 - oldp
MOVQ size+24(FP), R10 // arg 4 - oldlenp
MOVQ dst+32(FP), R8 // arg 5 - newp
MOVQ ndst+40(FP), R9 // arg 6 - newlen
MOVQ $202, AX // sys___sysctl
SYSCALL
JCC 4(PC)
NEGQ AX
MOVL AX, ret+48(FP)
RET
MOVL $0, AX
MOVL AX, ret+48(FP)
RET
TEXT runtime·osyield(SB),NOSPLIT,$-4
MOVL $331, AX // sys_sched_yield
SYSCALL
RET
TEXT runtime·sigprocmask(SB),NOSPLIT,$0
MOVL $3, DI // arg 1 - how (SIG_SETMASK)
MOVQ new+0(FP), SI // arg 2 - set
MOVQ old+8(FP), DX // arg 3 - oset
MOVL $340, AX // sys_sigprocmask
SYSCALL
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
// int32 runtime·kqueue(void);
TEXT runtime·kqueue(SB),NOSPLIT,$0
MOVQ $0, DI
MOVQ $0, SI
MOVQ $0, DX
MOVL $362, AX
SYSCALL
JCC 2(PC)
NEGQ AX
MOVL AX, 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
MOVL fd+0(FP), DI
MOVQ ev1+8(FP), SI
MOVL nev1+16(FP), DX
MOVQ ev2+24(FP), R10
MOVL nev2+32(FP), R8
MOVQ ts+40(FP), R9
MOVL $363, AX
SYSCALL
JCC 2(PC)
NEGQ AX
MOVL AX, ret+48(FP)
RET
// void runtime·closeonexec(int32 fd);
TEXT runtime·closeonexec(SB),NOSPLIT,$0
MOVL fd+0(FP), DI // fd
MOVQ $2, SI // F_SETFD
MOVQ $1, DX // FD_CLOEXEC
MOVL $92, AX // fcntl
SYSCALL
RET
|
