forked from WebKit/WebKit
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathJITStubsMSVC64.asm
More file actions
497 lines (427 loc) · 20.3 KB
/
JITStubsMSVC64.asm
File metadata and controls
497 lines (427 loc) · 20.3 KB
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
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
;/*
; Copyright (C) 2014 Apple Inc. All rights reserved.
;
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions
; are met:
; 1. Redistributions of source code must retain the above copyright
; notice, this list of conditions and the following disclaimer.
; 2. Redistributions in binary form must reproduce the above copyright
; notice, this list of conditions and the following disclaimer in the
; documentation and/or other materials provided with the distribution.
;
; THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
; PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
; CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
; EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
; OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;*/
PUBLIC ctiMasmProbeTrampoline
PUBLIC ctiMasmProbeTrampolineSIMD
_TEXT SEGMENT
; The following constants must match the x86_64 version in MacroAssemblerX86Common.cpp.
PTR_SIZE EQU 8
PROBE_PROBE_FUNCTION_OFFSET EQU (0 * PTR_SIZE)
PROBE_ARG_OFFSET EQU (1 * PTR_SIZE)
PROBE_INIT_STACK_FUNCTION_OFFSET EQU (2 * PTR_SIZE)
PROBE_INIT_STACK_ARG_OFFSET EQU (3 * PTR_SIZE)
PROBE_FIRST_GPR_OFFSET EQU (4 * PTR_SIZE)
PROBE_CPU_EAX_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (0 * PTR_SIZE))
PROBE_CPU_ECX_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (1 * PTR_SIZE))
PROBE_CPU_EDX_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (2 * PTR_SIZE))
PROBE_CPU_EBX_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (3 * PTR_SIZE))
PROBE_CPU_ESP_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (4 * PTR_SIZE))
PROBE_CPU_EBP_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (5 * PTR_SIZE))
PROBE_CPU_ESI_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (6 * PTR_SIZE))
PROBE_CPU_EDI_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (7 * PTR_SIZE))
PROBE_CPU_R8_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (8 * PTR_SIZE))
PROBE_CPU_R9_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (9 * PTR_SIZE))
PROBE_CPU_R10_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (10 * PTR_SIZE))
PROBE_CPU_R11_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (11 * PTR_SIZE))
PROBE_CPU_R12_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (12 * PTR_SIZE))
PROBE_CPU_R13_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (13 * PTR_SIZE))
PROBE_CPU_R14_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (14 * PTR_SIZE))
PROBE_CPU_R15_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (15 * PTR_SIZE))
PROBE_FIRST_SPR_OFFSET EQU (PROBE_FIRST_GPR_OFFSET + (16 * PTR_SIZE))
PROBE_CPU_EIP_OFFSET EQU (PROBE_FIRST_SPR_OFFSET + (0 * PTR_SIZE))
PROBE_CPU_EFLAGS_OFFSET EQU (PROBE_FIRST_SPR_OFFSET + (1 * PTR_SIZE))
PROBE_FIRST_XMM_OFFSET EQU (PROBE_FIRST_SPR_OFFSET + (2 * PTR_SIZE))
XMM_SIZE EQU 8
PROBE_CPU_XMM0_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (0 * XMM_SIZE))
PROBE_CPU_XMM1_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (1 * XMM_SIZE))
PROBE_CPU_XMM2_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (2 * XMM_SIZE))
PROBE_CPU_XMM3_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (3 * XMM_SIZE))
PROBE_CPU_XMM4_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (4 * XMM_SIZE))
PROBE_CPU_XMM5_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (5 * XMM_SIZE))
PROBE_CPU_XMM6_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (6 * XMM_SIZE))
PROBE_CPU_XMM7_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (7 * XMM_SIZE))
PROBE_CPU_XMM8_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (8 * XMM_SIZE))
PROBE_CPU_XMM9_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (9 * XMM_SIZE))
PROBE_CPU_XMM10_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (10 * XMM_SIZE))
PROBE_CPU_XMM11_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (11 * XMM_SIZE))
PROBE_CPU_XMM12_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (12 * XMM_SIZE))
PROBE_CPU_XMM13_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (13 * XMM_SIZE))
PROBE_CPU_XMM14_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (14 * XMM_SIZE))
PROBE_CPU_XMM15_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (15 * XMM_SIZE))
; For the case when we want to save 128 bits for each XMM register, the layout is different.
PROBE_CPU_XMM0_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (0 * 2 * XMM_SIZE))
PROBE_CPU_XMM1_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (1 * 2 * XMM_SIZE))
PROBE_CPU_XMM2_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (2 * 2 * XMM_SIZE))
PROBE_CPU_XMM3_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (3 * 2 * XMM_SIZE))
PROBE_CPU_XMM4_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (4 * 2 * XMM_SIZE))
PROBE_CPU_XMM5_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (5 * 2 * XMM_SIZE))
PROBE_CPU_XMM6_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (6 * 2 * XMM_SIZE))
PROBE_CPU_XMM7_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (7 * 2 * XMM_SIZE))
PROBE_CPU_XMM8_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (8 * 2 * XMM_SIZE))
PROBE_CPU_XMM9_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (9 * 2 * XMM_SIZE))
PROBE_CPU_XMM10_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (10 * 2 * XMM_SIZE))
PROBE_CPU_XMM11_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (11 * 2 * XMM_SIZE))
PROBE_CPU_XMM12_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (12 * 2 * XMM_SIZE))
PROBE_CPU_XMM13_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (13 * 2 * XMM_SIZE))
PROBE_CPU_XMM14_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (14 * 2 * XMM_SIZE))
PROBE_CPU_XMM15_VECTOR_OFFSET EQU (PROBE_FIRST_XMM_OFFSET + (15 * 2 * XMM_SIZE))
PROBE_SIZE EQU (PROBE_FIRST_XMM_OFFSET + 16 * 2 * XMM_SIZE)
PROBE_EXECUTOR_OFFSET EQU PROBE_SIZE ; Stash the executeProbe function pointer at the end of the ProbeContext.
OUT_SIZE EQU (5 * PTR_SIZE)
ctiMasmProbeTrampoline PROC
pushfq
; MacroAssemblerX86Common::probe() has already generated code to store some values.
; Together with the rflags pushed above, the top of stack now looks like this:
; rsp[0 * ptrSize]: rflags
; rsp[1 * ptrSize]: return address / saved rip
; rsp[2 * ptrSize]: saved rbx
; rsp[3 * ptrSize]: saved rdx
; rsp[4 * ptrSize]: saved rcx
; rsp[5 * ptrSize]: saved rax
;
; Incoming registers contain:
; rcx: Probe::executeProbe
; rdx: probe function
; rbx: probe arg
; rax: scratch (was ctiMasmProbeTrampoline)
mov rax, rsp
sub rsp, PROBE_SIZE + OUT_SIZE
; The X86_64 ABI specifies that the worse case stack alignment requirement is 32 bytes.
and rsp, not 01fh
; Since sp points to the ProbeContext, we've ensured that it's protected from interrupts before we initialize it.
mov [PROBE_CPU_EBP_OFFSET + rsp], rbp
mov rbp, rsp ; Save the ProbeContext*.
mov [PROBE_EXECUTOR_OFFSET + rbp], rcx
mov [PROBE_PROBE_FUNCTION_OFFSET + rbp], rdx
mov [PROBE_ARG_OFFSET + rbp], rbx
mov [PROBE_CPU_ESI_OFFSET + rbp], rsi
mov [PROBE_CPU_EDI_OFFSET + rbp], rdi
mov rcx, [0 * PTR_SIZE + rax]
mov [PROBE_CPU_EFLAGS_OFFSET + rbp], rcx
mov rcx, [1 * PTR_SIZE + rax]
mov [PROBE_CPU_EIP_OFFSET + rbp], rcx
mov rcx, [2 * PTR_SIZE + rax]
mov [PROBE_CPU_EBX_OFFSET + rbp], rcx
mov rcx, [3 * PTR_SIZE + rax]
mov [PROBE_CPU_EDX_OFFSET + rbp], rcx
mov rcx, [4 * PTR_SIZE + rax]
mov [PROBE_CPU_ECX_OFFSET + rbp], rcx
mov rcx, [5 * PTR_SIZE + rax]
mov [PROBE_CPU_EAX_OFFSET + rbp], rcx
mov rcx, rax
add rcx, 6 * PTR_SIZE
mov [PROBE_CPU_ESP_OFFSET + rbp], rcx
mov [PROBE_CPU_R8_OFFSET + rbp], r8
mov [PROBE_CPU_R9_OFFSET + rbp], r9
mov [PROBE_CPU_R10_OFFSET + rbp], r10
mov [PROBE_CPU_R11_OFFSET + rbp], r11
mov [PROBE_CPU_R12_OFFSET + rbp], r12
mov [PROBE_CPU_R13_OFFSET + rbp], r13
mov [PROBE_CPU_R14_OFFSET + rbp], r14
mov [PROBE_CPU_R15_OFFSET + rbp], r15
movq qword ptr [PROBE_CPU_XMM0_OFFSET + rbp], xmm0
movq qword ptr [PROBE_CPU_XMM1_OFFSET + rbp], xmm1
movq qword ptr [PROBE_CPU_XMM2_OFFSET + rbp], xmm2
movq qword ptr [PROBE_CPU_XMM3_OFFSET + rbp], xmm3
movq qword ptr [PROBE_CPU_XMM4_OFFSET + rbp], xmm4
movq qword ptr [PROBE_CPU_XMM5_OFFSET + rbp], xmm5
movq qword ptr [PROBE_CPU_XMM6_OFFSET + rbp], xmm6
movq qword ptr [PROBE_CPU_XMM7_OFFSET + rbp], xmm7
movq qword ptr [PROBE_CPU_XMM8_OFFSET + rbp], xmm8
movq qword ptr [PROBE_CPU_XMM9_OFFSET + rbp], xmm9
movq qword ptr [PROBE_CPU_XMM10_OFFSET + rbp], xmm10
movq qword ptr [PROBE_CPU_XMM11_OFFSET + rbp], xmm11
movq qword ptr [PROBE_CPU_XMM12_OFFSET + rbp], xmm12
movq qword ptr [PROBE_CPU_XMM13_OFFSET + rbp], xmm13
movq qword ptr [PROBE_CPU_XMM14_OFFSET + rbp], xmm14
movq qword ptr [PROBE_CPU_XMM15_OFFSET + rbp], xmm15
mov rcx, rbp ; the Probe::State* arg.
sub rsp, 32 ; shadow space
call qword ptr[PROBE_EXECUTOR_OFFSET + rbp]
add rsp, 32
; Make sure the ProbeContext is entirely below the result stack pointer so
; that register values are still preserved when we call the initializeStack
; function.
mov rcx, PROBE_SIZE + OUT_SIZE
mov rax, rbp
mov rdx, [PROBE_CPU_ESP_OFFSET + rbp]
add rax, rcx
cmp rdx, rax
jge ctiMasmProbeTrampolineProbeContextIsSafe
; Allocate a safe place on the stack below the result stack pointer to stash the ProbeContext.
sub rdx, rcx
and rdx, not 01fh ; Keep the stack pointer 32 bytes aligned.
xor rax, rax
mov rsp, rdx
mov rcx, PROBE_SIZE
; Copy the ProbeContext to the safe place.
ctiMasmProbeTrampolineCopyLoop:
mov rdx, [rbp + rax]
mov [rsp + rax], rdx
add rax, PTR_SIZE
cmp rcx, rax
jg ctiMasmProbeTrampolineCopyLoop
mov rbp, rsp
; Call initializeStackFunction if present.
ctiMasmProbeTrampolineProbeContextIsSafe:
xor rcx, rcx
add rcx, [PROBE_INIT_STACK_FUNCTION_OFFSET + rbp]
je ctiMasmProbeTrampolineRestoreRegisters
mov rdx, rcx
mov rcx, rbp ; the Probe::State* arg.
sub rsp, 32 ; shadow space
call rdx
add rsp, 32
ctiMasmProbeTrampolineRestoreRegisters:
; To enable probes to modify register state, we copy all registers
; out of the ProbeContext before returning.
mov rdx, [PROBE_CPU_EDX_OFFSET + rbp]
mov rbx, [PROBE_CPU_EBX_OFFSET + rbp]
mov rsi, [PROBE_CPU_ESI_OFFSET + rbp]
mov rdi, [PROBE_CPU_EDI_OFFSET + rbp]
mov r8, [PROBE_CPU_R8_OFFSET + rbp]
mov r9, [PROBE_CPU_R9_OFFSET + rbp]
mov r10, [PROBE_CPU_R10_OFFSET + rbp]
mov r11, [PROBE_CPU_R11_OFFSET + rbp]
mov r12, [PROBE_CPU_R12_OFFSET + rbp]
mov r13, [PROBE_CPU_R13_OFFSET + rbp]
mov r14, [PROBE_CPU_R14_OFFSET + rbp]
mov r15, [PROBE_CPU_R15_OFFSET + rbp]
movq xmm0, qword ptr[PROBE_CPU_XMM0_OFFSET + rbp]
movq xmm1, qword ptr[PROBE_CPU_XMM1_OFFSET + rbp]
movq xmm2, qword ptr[PROBE_CPU_XMM2_OFFSET + rbp]
movq xmm3, qword ptr[PROBE_CPU_XMM3_OFFSET + rbp]
movq xmm4, qword ptr[PROBE_CPU_XMM4_OFFSET + rbp]
movq xmm5, qword ptr[PROBE_CPU_XMM5_OFFSET + rbp]
movq xmm6, qword ptr[PROBE_CPU_XMM6_OFFSET + rbp]
movq xmm7, qword ptr[PROBE_CPU_XMM7_OFFSET + rbp]
movq xmm8, qword ptr[PROBE_CPU_XMM8_OFFSET + rbp]
movq xmm9, qword ptr[PROBE_CPU_XMM9_OFFSET + rbp]
movq xmm10, qword ptr[PROBE_CPU_XMM10_OFFSET + rbp]
movq xmm11, qword ptr[PROBE_CPU_XMM11_OFFSET + rbp]
movq xmm12, qword ptr[PROBE_CPU_XMM12_OFFSET + rbp]
movq xmm13, qword ptr[PROBE_CPU_XMM13_OFFSET + rbp]
movq xmm14, qword ptr[PROBE_CPU_XMM14_OFFSET + rbp]
movq xmm15, qword ptr[PROBE_CPU_XMM15_OFFSET + rbp]
; There are 6 more registers left to restore:
; rax, rcx, rbp, rsp, rip, and rflags.
; The restoration process at ctiMasmProbeTrampolineEnd below works by popping
; 5 words off the stack into rflags, rax, rcx, rbp, and rip. These 5 words need
; to be pushed on top of the final esp value so that just by popping the 5 words,
; we'll get the esp that the probe wants to set. Let's call this area (for storing
; these 5 words) the restore area.
mov rcx, [PROBE_CPU_ESP_OFFSET + rbp]
sub rcx, 5 * PTR_SIZE
; rcx now points to the restore area.
; Copy remaining restore values from the ProbeContext to the restore area.
; Note: We already ensured above that the ProbeContext is in a safe location before
; calling the initializeStackFunction. The initializeStackFunction is not allowed to
; change the stack pointer again.
mov rax, [PROBE_CPU_EFLAGS_OFFSET + rbp]
mov [0 * PTR_SIZE + rcx], rax
mov rax, [PROBE_CPU_EAX_OFFSET + rbp]
mov [1 * PTR_SIZE + rcx], rax
mov rax, [PROBE_CPU_ECX_OFFSET + rbp]
mov [2 * PTR_SIZE + rcx], rax
mov rax, [PROBE_CPU_EBP_OFFSET + rbp]
mov [3 * PTR_SIZE + rcx], rax
mov rax, [PROBE_CPU_EIP_OFFSET + rbp]
mov [4 * PTR_SIZE + rcx], rax
mov rsp, rcx
; Do the remaining restoration by popping off the restore area.
popfq
pop rax
pop rcx
pop rbp
ret
ctiMasmProbeTrampoline ENDP
ctiMasmProbeTrampolineSIMD PROC
pushfq
; MacroAssemblerX86Common::probe() has already generated code to store some values.
; Together with the rflags pushed above, the top of stack now looks like this:
; rsp[0 * ptrSize]: rflags
; rsp[1 * ptrSize]: return address / saved rip
; rsp[2 * ptrSize]: saved rbx
; rsp[3 * ptrSize]: saved rdx
; rsp[4 * ptrSize]: saved rcx
; rsp[5 * ptrSize]: saved rax
;
; Incoming registers contain:
; rcx: Probe::executeProbe
; rdx: probe function
; rbx: probe arg
; rax: scratch (was ctiMasmProbeTrampoline)
mov rax, rsp
sub rsp, PROBE_SIZE + OUT_SIZE
; The X86_64 ABI specifies that the worse case stack alignment requirement is 32 bytes.
and rsp, not 01fh
; Since sp points to the ProbeContext, we've ensured that it's protected from interrupts before we initialize it.
mov [PROBE_CPU_EBP_OFFSET + rsp], rbp
mov rbp, rsp ; Save the ProbeContext*.
mov [PROBE_EXECUTOR_OFFSET + rbp], rcx
mov [PROBE_PROBE_FUNCTION_OFFSET + rbp], rdx
mov [PROBE_ARG_OFFSET + rbp], rbx
mov [PROBE_CPU_ESI_OFFSET + rbp], rsi
mov [PROBE_CPU_EDI_OFFSET + rbp], rdi
mov rcx, [0 * PTR_SIZE + rax]
mov [PROBE_CPU_EFLAGS_OFFSET + rbp], rcx
mov rcx, [1 * PTR_SIZE + rax]
mov [PROBE_CPU_EIP_OFFSET + rbp], rcx
mov rcx, [2 * PTR_SIZE + rax]
mov [PROBE_CPU_EBX_OFFSET + rbp], rcx
mov rcx, [3 * PTR_SIZE + rax]
mov [PROBE_CPU_EDX_OFFSET + rbp], rcx
mov rcx, [4 * PTR_SIZE + rax]
mov [PROBE_CPU_ECX_OFFSET + rbp], rcx
mov rcx, [5 * PTR_SIZE + rax]
mov [PROBE_CPU_EAX_OFFSET + rbp], rcx
mov rcx, rax
add rcx, 6 * PTR_SIZE
mov [PROBE_CPU_ESP_OFFSET + rbp], rcx
mov [PROBE_CPU_R8_OFFSET + rbp], r8
mov [PROBE_CPU_R9_OFFSET + rbp], r9
mov [PROBE_CPU_R10_OFFSET + rbp], r10
mov [PROBE_CPU_R11_OFFSET + rbp], r11
mov [PROBE_CPU_R12_OFFSET + rbp], r12
mov [PROBE_CPU_R13_OFFSET + rbp], r13
mov [PROBE_CPU_R14_OFFSET + rbp], r14
mov [PROBE_CPU_R15_OFFSET + rbp], r15
vmovaps xmmword ptr [PROBE_CPU_XMM0_VECTOR_OFFSET + rbp], xmm0
vmovaps xmmword ptr [PROBE_CPU_XMM1_VECTOR_OFFSET + rbp], xmm1
vmovaps xmmword ptr [PROBE_CPU_XMM2_VECTOR_OFFSET + rbp], xmm2
vmovaps xmmword ptr [PROBE_CPU_XMM3_VECTOR_OFFSET + rbp], xmm3
vmovaps xmmword ptr [PROBE_CPU_XMM4_VECTOR_OFFSET + rbp], xmm4
vmovaps xmmword ptr [PROBE_CPU_XMM5_VECTOR_OFFSET + rbp], xmm5
vmovaps xmmword ptr [PROBE_CPU_XMM6_VECTOR_OFFSET + rbp], xmm6
vmovaps xmmword ptr [PROBE_CPU_XMM7_VECTOR_OFFSET + rbp], xmm7
vmovaps xmmword ptr [PROBE_CPU_XMM8_VECTOR_OFFSET + rbp], xmm8
vmovaps xmmword ptr [PROBE_CPU_XMM9_VECTOR_OFFSET + rbp], xmm9
vmovaps xmmword ptr [PROBE_CPU_XMM10_VECTOR_OFFSET + rbp], xmm10
vmovaps xmmword ptr [PROBE_CPU_XMM11_VECTOR_OFFSET + rbp], xmm11
vmovaps xmmword ptr [PROBE_CPU_XMM12_VECTOR_OFFSET + rbp], xmm12
vmovaps xmmword ptr [PROBE_CPU_XMM13_VECTOR_OFFSET + rbp], xmm13
vmovaps xmmword ptr [PROBE_CPU_XMM14_VECTOR_OFFSET + rbp], xmm14
vmovaps xmmword ptr [PROBE_CPU_XMM15_VECTOR_OFFSET + rbp], xmm15
mov rcx, rbp ; the Probe::State* arg.
sub rsp, 32 ; shadow space
call qword ptr[PROBE_EXECUTOR_OFFSET + rbp]
add rsp, 32
; Make sure the ProbeContext is entirely below the result stack pointer so
; that register values are still preserved when we call the initializeStack
; function.
mov rcx, PROBE_SIZE + OUT_SIZE
mov rax, rbp
mov rdx, [PROBE_CPU_ESP_OFFSET + rbp]
add rax, rcx
cmp rdx, rax
jge ctiMasmProbeTrampolineProbeContextIsSafeSIMD
; Allocate a safe place on the stack below the result stack pointer to stash the ProbeContext.
sub rdx, rcx
and rdx, not 01fh ; Keep the stack pointer 32 bytes aligned.
xor rax, rax
mov rsp, rdx
mov rcx, PROBE_SIZE
; Copy the ProbeContext to the safe place.
ctiMasmProbeTrampolineCopyLoopSIMD:
mov rdx, [rbp + rax]
mov [rsp + rax], rdx
add rax, PTR_SIZE
cmp rcx, rax
jg ctiMasmProbeTrampolineCopyLoopSIMD
mov rbp, rsp
; Call initializeStackFunction if present.
ctiMasmProbeTrampolineProbeContextIsSafeSIMD:
xor rcx, rcx
add rcx, [PROBE_INIT_STACK_FUNCTION_OFFSET + rbp]
je ctiMasmProbeTrampolineRestoreRegistersSIMD
mov rdx, rcx
mov rcx, rbp ; the Probe::State* arg.
sub rsp, 32 ; shadow space
call rdx
add rsp, 32
ctiMasmProbeTrampolineRestoreRegistersSIMD:
; To enable probes to modify register state, we copy all registers
; out of the ProbeContext before returning.
mov rdx, [PROBE_CPU_EDX_OFFSET + rbp]
mov rbx, [PROBE_CPU_EBX_OFFSET + rbp]
mov rsi, [PROBE_CPU_ESI_OFFSET + rbp]
mov rdi, [PROBE_CPU_EDI_OFFSET + rbp]
mov r8, [PROBE_CPU_R8_OFFSET + rbp]
mov r9, [PROBE_CPU_R9_OFFSET + rbp]
mov r10, [PROBE_CPU_R10_OFFSET + rbp]
mov r11, [PROBE_CPU_R11_OFFSET + rbp]
mov r12, [PROBE_CPU_R12_OFFSET + rbp]
mov r13, [PROBE_CPU_R13_OFFSET + rbp]
mov r14, [PROBE_CPU_R14_OFFSET + rbp]
mov r15, [PROBE_CPU_R15_OFFSET + rbp]
vmovaps xmm0, xmmword ptr [PROBE_CPU_XMM0_VECTOR_OFFSET + rbp]
vmovaps xmm1, xmmword ptr [PROBE_CPU_XMM1_VECTOR_OFFSET + rbp]
vmovaps xmm2, xmmword ptr [PROBE_CPU_XMM2_VECTOR_OFFSET + rbp]
vmovaps xmm3, xmmword ptr [PROBE_CPU_XMM3_VECTOR_OFFSET + rbp]
vmovaps xmm4, xmmword ptr [PROBE_CPU_XMM4_VECTOR_OFFSET + rbp]
vmovaps xmm5, xmmword ptr [PROBE_CPU_XMM5_VECTOR_OFFSET + rbp]
vmovaps xmm6, xmmword ptr [PROBE_CPU_XMM6_VECTOR_OFFSET + rbp]
vmovaps xmm7, xmmword ptr [PROBE_CPU_XMM7_VECTOR_OFFSET + rbp]
vmovaps xmm8, xmmword ptr [PROBE_CPU_XMM8_VECTOR_OFFSET + rbp]
vmovaps xmm9, xmmword ptr [PROBE_CPU_XMM9_VECTOR_OFFSET + rbp]
vmovaps xmm10, xmmword ptr [PROBE_CPU_XMM10_VECTOR_OFFSET + rbp]
vmovaps xmm11, xmmword ptr [PROBE_CPU_XMM11_VECTOR_OFFSET + rbp]
vmovaps xmm12, xmmword ptr [PROBE_CPU_XMM12_VECTOR_OFFSET + rbp]
vmovaps xmm13, xmmword ptr [PROBE_CPU_XMM13_VECTOR_OFFSET + rbp]
vmovaps xmm14, xmmword ptr [PROBE_CPU_XMM14_VECTOR_OFFSET + rbp]
vmovaps xmm15, xmmword ptr [PROBE_CPU_XMM15_VECTOR_OFFSET + rbp]
; There are 6 more registers left to restore:
; rax, rcx, rbp, rsp, rip, and rflags.
; The restoration process at ctiMasmProbeTrampolineEnd below works by popping
; 5 words off the stack into rflags, rax, rcx, rbp, and rip. These 5 words need
; to be pushed on top of the final esp value so that just by popping the 5 words,
; we'll get the esp that the probe wants to set. Let's call this area (for storing
; these 5 words) the restore area.
mov rcx, [PROBE_CPU_ESP_OFFSET + rbp]
sub rcx, 5 * PTR_SIZE
; rcx now points to the restore area.
; Copy remaining restore values from the ProbeContext to the restore area.
; Note: We already ensured above that the ProbeContext is in a safe location before
; calling the initializeStackFunction. The initializeStackFunction is not allowed to
; change the stack pointer again.
mov rax, [PROBE_CPU_EFLAGS_OFFSET + rbp]
mov [0 * PTR_SIZE + rcx], rax
mov rax, [PROBE_CPU_EAX_OFFSET + rbp]
mov [1 * PTR_SIZE + rcx], rax
mov rax, [PROBE_CPU_ECX_OFFSET + rbp]
mov [2 * PTR_SIZE + rcx], rax
mov rax, [PROBE_CPU_EBP_OFFSET + rbp]
mov [3 * PTR_SIZE + rcx], rax
mov rax, [PROBE_CPU_EIP_OFFSET + rbp]
mov [4 * PTR_SIZE + rcx], rax
mov rsp, rcx
; Do the remaining restoration by popping off the restore area.
popfq
pop rax
pop rcx
pop rbp
ret
ctiMasmProbeTrampolineSIMD ENDP
_TEXT ENDS
END