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
|
// 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 386, NetBSD
// /usr/src/sys/kern/syscalls.master for syscall numbers.
//
#include "zasm_GOOS_GOARCH.h"
// Exit the entire program (like C exit)
TEXT runtime·exit(SB),7,$-4
MOVL $1, AX
INT $0x80
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·exit1(SB),7,$-4
MOVL $310, AX // sys__lwp_exit
INT $0x80
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·write(SB),7,$-4
MOVL $4, AX // sys_write
INT $0x80
RET
TEXT runtime·usleep(SB),7,$20
MOVL $0, DX
MOVL usec+0(FP), AX
MOVL $1000000, CX
DIVL CX
MOVL AX, 12(SP) // tv_sec
MOVL $1000, AX
MULL DX
MOVL AX, 16(SP) // tv_nsec
MOVL $0, 0(SP)
LEAL 12(SP), AX
MOVL AX, 4(SP) // arg 1 - rqtp
MOVL $0, 8(SP) // arg 2 - rmtp
MOVL $430, AX // sys_nanosleep
INT $0x80
RET
TEXT runtime·raisesigpipe(SB),7,$12
MOVL $311, AX // sys__lwp_self
INT $0x80
MOVL $0, 0(SP)
MOVL AX, 4(SP) // arg 1 - target
MOVL $13, 8(SP) // arg 2 - signo == SIGPIPE
MOVL $318, AX // sys__lwp_kill
INT $0x80
RET
TEXT runtime·mmap(SB),7,$36
LEAL arg0+0(FP), SI
LEAL 4(SP), DI
CLD
MOVSL // arg 1 - addr
MOVSL // arg 2 - len
MOVSL // arg 3 - prot
MOVSL // arg 4 - flags
MOVSL // arg 5 - fd
MOVL $0, AX
STOSL // arg 6 - pad
MOVSL // arg 7 - offset
MOVL $0, AX // top 64 bits of file offset
STOSL
MOVL $197, AX // sys_mmap
INT $0x80
JCC 2(PC)
NEGL AX
RET
TEXT runtime·munmap(SB),7,$-4
MOVL $73, AX // sys_munmap
INT $0x80
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·setitimer(SB),7,$-4
MOVL $425, AX // sys_setitimer
INT $0x80
RET
// func now() (sec int64, nsec int32)
TEXT time·now(SB), 7, $32
LEAL 12(SP), BX
MOVL BX, 4(SP) // arg 1 - tp
MOVL $0, 8(SP) // arg 2 - tzp
MOVL $418, AX // sys_gettimeofday
INT $0x80
MOVL 12(SP), AX // sec
MOVL 16(SP), BX // usec
// sec is in AX, usec in BX
MOVL AX, sec+0(FP)
MOVL $0, sec+4(FP)
IMULL $1000, BX
MOVL BX, nsec+8(FP)
RET
// int64 nanotime(void) so really
// void nanotime(int64 *nsec)
TEXT runtime·nanotime(SB),7,$32
LEAL 12(SP), BX
MOVL BX, 4(SP) // arg 1 - tp
MOVL $0, 8(SP) // arg 2 - tzp
MOVL $418, AX // sys_gettimeofday
INT $0x80
MOVL 12(SP), AX // sec
MOVL 16(SP), BX // usec
// sec is in AX, usec in BX
// convert to DX:AX nsec
MOVL $1000000000, CX
MULL CX
IMULL $1000, BX
ADDL BX, AX
ADCL $0, DX
MOVL ret+0(FP), DI
MOVL AX, 0(DI)
MOVL DX, 4(DI)
RET
TEXT runtime·getcontext(SB),7,$-4
MOVL $307, AX // sys_getcontext
INT $0x80
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigprocmask(SB),7,$-4
MOVL $293, AX // sys_sigprocmask
INT $0x80
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigreturn_tramp(SB),7,$0
LEAL 140(SP), AX // Load address of ucontext
MOVL AX, 4(SP)
MOVL $308, AX // sys_setcontext
INT $0x80
MOVL $-1, 4(SP) // Something failed...
MOVL $1, AX // sys_exit
INT $0x80
TEXT runtime·sigaction(SB),7,$24
LEAL arg0+0(FP), SI
LEAL 4(SP), DI
CLD
MOVSL // arg 1 - sig
MOVSL // arg 2 - act
MOVSL // arg 3 - oact
LEAL runtime·sigreturn_tramp(SB), AX
STOSL // arg 4 - tramp
MOVL $3, AX
STOSL // arg 5 - vers
MOVL $340, AX // sys___sigaction_sigtramp
INT $0x80
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigtramp(SB),7,$44
get_tls(CX)
// check that m exists
MOVL m(CX), BX
CMPL BX, $0
JNE 2(PC)
CALL runtime·badsignal(SB)
// save g
MOVL g(CX), DI
MOVL DI, 20(SP)
// g = m->gsignal
MOVL m_gsignal(BX), BX
MOVL BX, g(CX)
// copy arguments for call to sighandler
MOVL signo+0(FP), BX
MOVL BX, 0(SP)
MOVL info+4(FP), BX
MOVL BX, 4(SP)
MOVL context+8(FP), BX
MOVL BX, 8(SP)
MOVL DI, 12(SP)
CALL runtime·sighandler(SB)
// restore g
get_tls(CX)
MOVL 20(SP), BX
MOVL BX, g(CX)
RET
// int32 lwp_create(void *context, uintptr flags, void *lwpid);
TEXT runtime·lwp_create(SB),7,$16
MOVL $0, 0(SP)
MOVL context+0(FP), AX
MOVL AX, 4(SP) // arg 1 - context
MOVL flags+4(FP), AX
MOVL AX, 8(SP) // arg 2 - flags
MOVL lwpid+8(FP), AX
MOVL AX, 12(SP) // arg 3 - lwpid
MOVL $309, AX // sys__lwp_create
INT $0x80
JCC 2(PC)
NEGL AX
RET
TEXT runtime·lwp_tramp(SB),7,$0
// Set FS to point at m->tls
LEAL m_tls(BX), BP
PUSHAL // save registers
PUSHL BP
CALL runtime·settls(SB)
POPL AX
POPAL
// Now segment is established. Initialize m, g.
get_tls(AX)
MOVL DX, g(AX)
MOVL BX, m(AX)
CALL runtime·stackcheck(SB) // smashes AX, CX
MOVL 0(DX), DX // paranoia; check they are not nil
MOVL 0(BX), BX
// more paranoia; check that stack splitting code works
PUSHAL
CALL runtime·emptyfunc(SB)
POPAL
// Call fn
CALL SI
CALL runtime·exit1(SB)
MOVL $0x1234, 0x1005
RET
TEXT runtime·sigaltstack(SB),7,$-8
MOVL $281, AX // sys___sigaltstack14
MOVL new+4(SP), BX
MOVL old+8(SP), CX
INT $0x80
CMPL AX, $0xfffff001
JLS 2(PC)
INT $3
RET
TEXT runtime·setldt(SB),7,$8
// Under NetBSD we set the GS base instead of messing with the LDT.
MOVL 16(SP), AX // tls0
MOVL AX, 0(SP)
CALL runtime·settls(SB)
RET
TEXT runtime·settls(SB),7,$16
// adjust for ELF: wants to use -8(GS) and -4(GS) for g and m
MOVL base+0(FP), CX
ADDL $8, CX
MOVL $0, 0(SP) // syscall gap
MOVL CX, 4(SP) // arg 1 - ptr
MOVL $317, AX // sys__lwp_setprivate
INT $0x80
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·osyield(SB),7,$-4
MOVL $350, AX // sys_sched_yield
INT $0x80
RET
TEXT runtime·lwp_park(SB),7,$-4
MOVL $434, AX // sys__lwp_park
INT $0x80
RET
TEXT runtime·lwp_unpark(SB),7,$-4
MOVL $321, AX // sys__lwp_unpark
INT $0x80
RET
TEXT runtime·sysctl(SB),7,$28
LEAL arg0+0(FP), SI
LEAL 4(SP), DI
CLD
MOVSL // arg 1 - name
MOVSL // arg 2 - namelen
MOVSL // arg 3 - oldp
MOVSL // arg 4 - oldlenp
MOVSL // arg 5 - newp
MOVSL // arg 6 - newlen
MOVL $202, AX // sys___sysctl
INT $0x80
JCC 3(PC)
NEGL AX
RET
MOVL $0, AX
RET
GLOBL runtime·tlsoffset(SB),$4
|
