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
|
// 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 "go_asm.h"
#include "go_tls.h"
#include "textflag.h"
TEXT runtime·open(SB),NOSPLIT,$0
MOVQ $14, BP
SYSCALL
MOVL AX, ret+16(FP)
RET
TEXT runtime·pread(SB),NOSPLIT,$0
MOVQ $50, BP
SYSCALL
MOVL AX, ret+32(FP)
RET
TEXT runtime·pwrite(SB),NOSPLIT,$0
MOVQ $51, BP
SYSCALL
MOVL AX, ret+32(FP)
RET
// int32 _seek(int64*, int32, int64, int32)
TEXT _seek<>(SB),NOSPLIT,$0
MOVQ $39, BP
SYSCALL
RET
// int64 seek(int32, int64, int32)
// Convenience wrapper around _seek, the actual system call.
TEXT runtime·seek(SB),NOSPLIT,$32
LEAQ ret+24(FP), AX
MOVL fd+0(FP), BX
MOVQ offset+8(FP), CX
MOVL whence+16(FP), DX
MOVQ AX, 0(SP)
MOVL BX, 8(SP)
MOVQ CX, 16(SP)
MOVL DX, 24(SP)
CALL _seek<>(SB)
CMPL AX, $0
JGE 2(PC)
MOVQ $-1, ret+24(FP)
RET
TEXT runtime·closefd(SB),NOSPLIT,$0
MOVQ $4, BP
SYSCALL
MOVL AX, ret+8(FP)
RET
TEXT runtime·exits(SB),NOSPLIT,$0
MOVQ $8, BP
SYSCALL
RET
TEXT runtime·brk_(SB),NOSPLIT,$0
MOVQ $24, BP
SYSCALL
MOVL AX, ret+8(FP)
RET
TEXT runtime·sleep(SB),NOSPLIT,$0
MOVQ $17, BP
SYSCALL
MOVL AX, ret+8(FP)
RET
TEXT runtime·plan9_semacquire(SB),NOSPLIT,$0
MOVQ $37, BP
SYSCALL
MOVL AX, ret+16(FP)
RET
TEXT runtime·plan9_tsemacquire(SB),NOSPLIT,$0
MOVQ $52, BP
SYSCALL
MOVL AX, ret+16(FP)
RET
TEXT runtime·nsec(SB),NOSPLIT,$0
MOVQ $53, BP
SYSCALL
MOVQ AX, ret+8(FP)
RET
// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB),NOSPLIT,$8-12
CALL runtime·nanotime1(SB)
MOVQ 0(SP), AX
// generated code for
// func f(x uint64) (uint64, uint64) { return x/1000000000, x%1000000000 }
// adapted to reduce duplication
MOVQ AX, CX
MOVQ $1360296554856532783, AX
MULQ CX
ADDQ CX, DX
RCRQ $1, DX
SHRQ $29, DX
MOVQ DX, sec+0(FP)
IMULQ $1000000000, DX
SUBQ DX, CX
MOVL CX, nsec+8(FP)
RET
TEXT runtime·notify(SB),NOSPLIT,$0
MOVQ $28, BP
SYSCALL
MOVL AX, ret+8(FP)
RET
TEXT runtime·noted(SB),NOSPLIT,$0
MOVQ $29, BP
SYSCALL
MOVL AX, ret+8(FP)
RET
TEXT runtime·plan9_semrelease(SB),NOSPLIT,$0
MOVQ $38, BP
SYSCALL
MOVL AX, ret+16(FP)
RET
TEXT runtime·rfork(SB),NOSPLIT,$0
MOVQ $19, BP
SYSCALL
MOVL AX, ret+8(FP)
RET
TEXT runtime·tstart_plan9(SB),NOSPLIT,$8
MOVQ newm+0(FP), CX
MOVQ m_g0(CX), DX
// Layout new m scheduler stack on os stack.
MOVQ SP, AX
MOVQ AX, (g_stack+stack_hi)(DX)
SUBQ $(64*1024), AX // stack size
MOVQ AX, (g_stack+stack_lo)(DX)
MOVQ AX, g_stackguard0(DX)
MOVQ AX, g_stackguard1(DX)
// Initialize procid from TOS struct.
MOVQ _tos(SB), AX
MOVL 64(AX), AX
MOVQ AX, m_procid(CX) // save pid as m->procid
// Finally, initialize g.
get_tls(BX)
MOVQ DX, g(BX)
CALL runtime·stackcheck(SB) // smashes AX, CX
CALL runtime·mstart(SB)
// Exit the thread.
MOVQ $0, 0(SP)
CALL runtime·exits(SB)
JMP 0(PC)
// This is needed by asm_amd64.s
TEXT runtime·settls(SB),NOSPLIT,$0
RET
// void sigtramp(void *ureg, int8 *note)
TEXT runtime·sigtramp(SB),NOSPLIT|NOFRAME,$0
get_tls(AX)
// check that g exists
MOVQ g(AX), BX
CMPQ BX, $0
JNE 3(PC)
CALL runtime·badsignal2(SB) // will exit
RET
// save args
MOVQ ureg+0(FP), CX
MOVQ note+8(FP), DX
// change stack
MOVQ g_m(BX), BX
MOVQ m_gsignal(BX), R10
MOVQ (g_stack+stack_hi)(R10), BP
MOVQ BP, SP
// make room for args and g
SUBQ $128, SP
// save g
MOVQ g(AX), BP
MOVQ BP, 32(SP)
// g = m->gsignal
MOVQ R10, g(AX)
// load args and call sighandler
MOVQ CX, 0(SP)
MOVQ DX, 8(SP)
MOVQ BP, 16(SP)
CALL runtime·sighandler(SB)
MOVL 24(SP), AX
// restore g
get_tls(BX)
MOVQ 32(SP), R10
MOVQ R10, g(BX)
// call noted(AX)
MOVQ AX, 0(SP)
CALL runtime·noted(SB)
RET
TEXT runtime·setfpmasks(SB),NOSPLIT,$8
STMXCSR 0(SP)
MOVL 0(SP), AX
ANDL $~0x3F, AX
ORL $(0x3F<<7), AX
MOVL AX, 0(SP)
LDMXCSR 0(SP)
RET
#define ERRMAX 128 /* from os_plan9.h */
// void errstr(int8 *buf, int32 len)
TEXT errstr<>(SB),NOSPLIT,$0
MOVQ $41, BP
SYSCALL
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_amd64.s:/·Syscall/
TEXT runtime·errstr(SB),NOSPLIT,$16-16
get_tls(AX)
MOVQ g(AX), BX
MOVQ g_m(BX), BX
MOVQ (m_mOS+mOS_errstr)(BX), CX
MOVQ CX, 0(SP)
MOVQ $ERRMAX, 8(SP)
CALL errstr<>(SB)
CALL runtime·findnull(SB)
MOVQ 8(SP), AX
MOVQ AX, ret_len+8(FP)
MOVQ 0(SP), AX
MOVQ AX, ret_base+0(FP)
RET
// never called on this platform
TEXT ·sigpanictramp(SB),NOSPLIT,$0-0
UNDEF
|
