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
|
// Copyright 2010 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.
#include "zasm_GOOS_GOARCH.h"
#include "textflag.h"
// setldt(int entry, int address, int limit)
TEXT runtime·setldt(SB),NOSPLIT,$0
RET
TEXT runtime·open(SB),NOSPLIT,$0
MOVL $14, AX
INT $64
MOVL AX, ret+12(FP)
RET
TEXT runtime·pread(SB),NOSPLIT,$0
MOVL $50, AX
INT $64
MOVL AX, ret+20(FP)
RET
TEXT runtime·pwrite(SB),NOSPLIT,$0
MOVL $51, AX
INT $64
MOVL AX, ret+20(FP)
RET
// int32 _seek(int64*, int32, int64, int32)
TEXT _seek<>(SB),NOSPLIT,$0
MOVL $39, AX
INT $64
RET
TEXT runtime·seek(SB),NOSPLIT,$24
LEAL ret+16(FP), AX
MOVL fd+0(FP), BX
MOVL offset_lo+4(FP), CX
MOVL offset_hi+8(FP), DX
MOVL whence+12(FP), SI
MOVL AX, 0(SP)
MOVL BX, 4(SP)
MOVL CX, 8(SP)
MOVL DX, 12(SP)
MOVL SI, 16(SP)
CALL _seek<>(SB)
CMPL AX, $0
JGE 3(PC)
MOVL $-1, ret_lo+16(FP)
MOVL $-1, ret_hi+20(FP)
RET
TEXT runtime·close(SB),NOSPLIT,$0
MOVL $4, AX
INT $64
MOVL AX, ret+4(FP)
RET
TEXT runtime·exits(SB),NOSPLIT,$0
MOVL $8, AX
INT $64
RET
TEXT runtime·brk_(SB),NOSPLIT,$0
MOVL $24, AX
INT $64
MOVL AX, ret+4(FP)
RET
TEXT runtime·sleep(SB),NOSPLIT,$0
MOVL $17, AX
INT $64
MOVL AX, ret+4(FP)
RET
TEXT runtime·plan9_semacquire(SB),NOSPLIT,$0
MOVL $37, AX
INT $64
MOVL AX, ret+8(FP)
RET
TEXT runtime·plan9_tsemacquire(SB),NOSPLIT,$0
MOVL $52, AX
INT $64
MOVL AX, ret+8(FP)
RET
TEXT nsec<>(SB),NOSPLIT,$0
MOVL $53, AX
INT $64
RET
TEXT runtime·nsec(SB),NOSPLIT,$8
LEAL ret+4(FP), AX
MOVL AX, 0(SP)
CALL nsec<>(SB)
CMPL AX, $0
JGE 3(PC)
MOVL $-1, ret_lo+4(FP)
MOVL $-1, ret_hi+8(FP)
RET
// func now() (sec int64, nsec int32)
TEXT time·now(SB),NOSPLIT,$8-12
CALL runtime·nanotime(SB)
MOVL 0(SP), AX
MOVL 4(SP), DX
MOVL $1000000000, CX
DIVL CX
MOVL AX, sec+0(FP)
MOVL $0, sec+4(FP)
MOVL DX, nsec+8(FP)
RET
TEXT runtime·notify(SB),NOSPLIT,$0
MOVL $28, AX
INT $64
MOVL AX, ret+4(FP)
RET
TEXT runtime·noted(SB),NOSPLIT,$0
MOVL $29, AX
INT $64
MOVL AX, ret+4(FP)
RET
TEXT runtime·plan9_semrelease(SB),NOSPLIT,$0
MOVL $38, AX
INT $64
MOVL AX, ret+8(FP)
RET
TEXT runtime·rfork(SB),NOSPLIT,$0
MOVL $19, AX
INT $64
MOVL AX, ret+4(FP)
RET
TEXT runtime·tstart_plan9(SB),NOSPLIT,$0
MOVL newm+0(FP), CX
MOVL m_g0(CX), DX
// Layout new m scheduler stack on os stack.
MOVL SP, AX
MOVL AX, (g_stack+stack_hi)(DX)
SUBL $(64*1024), AX // stack size
MOVL AX, (g_stack+stack_lo)(DX)
MOVL AX, g_stackguard0(DX)
MOVL AX, g_stackguard1(DX)
// Initialize procid from TOS struct.
MOVL _tos(SB), AX
MOVL 48(AX), AX
MOVL AX, m_procid(CX) // save pid as m->procid
// Finally, initialize g.
get_tls(BX)
MOVL DX, g(BX)
CALL runtime·stackcheck(SB) // smashes AX, CX
CALL runtime·mstart(SB)
MOVL $0x1234, 0x1234 // not reached
RET
// void sigtramp(void *ureg, int8 *note)
TEXT runtime·sigtramp(SB),NOSPLIT,$0
get_tls(AX)
// check that g exists
MOVL g(AX), BX
CMPL BX, $0
JNE 3(PC)
CALL runtime·badsignal2(SB) // will exit
RET
// save args
MOVL ureg+4(SP), CX
MOVL note+8(SP), DX
// change stack
MOVL g_m(BX), BX
MOVL m_gsignal(BX), BP
MOVL (g_stack+stack_hi)(BP), BP
MOVL BP, SP
// make room for args and g
SUBL $24, SP
// save g
MOVL g(AX), BP
MOVL BP, 20(SP)
// g = m->gsignal
MOVL m_gsignal(BX), DI
MOVL DI, g(AX)
// load args and call sighandler
MOVL CX, 0(SP)
MOVL DX, 4(SP)
MOVL BP, 8(SP)
CALL runtime·sighandler(SB)
MOVL 12(SP), AX
// restore g
get_tls(BX)
MOVL 20(SP), BP
MOVL BP, g(BX)
// call noted(AX)
MOVL AX, 0(SP)
CALL runtime·noted(SB)
RET
// Only used by the 64-bit runtime.
TEXT runtime·setfpmasks(SB),NOSPLIT,$0
RET
#define ERRMAX 128 /* from os_plan9.h */
// void errstr(int8 *buf, int32 len)
TEXT errstr<>(SB),NOSPLIT,$0
MOVL $41, AX
INT $64
RET
// func errstr() string
// Only used by package syscall.
// Grab error string due to a syscall made
// in entersyscall mode, without going
// through the allocator (issue 4994).
// See ../syscall/asm_plan9_386.s:/·Syscall/
TEXT runtime·errstr(SB),NOSPLIT,$8-8
get_tls(AX)
MOVL g(AX), BX
MOVL g_m(BX), BX
MOVL m_errstr(BX), CX
MOVL CX, 0(SP)
MOVL $ERRMAX, 4(SP)
CALL errstr<>(SB)
CALL runtime·findnull(SB)
MOVL 4(SP), AX
MOVL AX, ret_len+4(FP)
MOVL 0(SP), AX
MOVL AX, ret_base+0(FP)
RET
|
