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
|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
.macro NESTED_ENTRY Name, Section, Handler
LEAF_ENTRY \Name, \Section
.ifnc \Handler, NoHandler
#if defined(__APPLE__)
.cfi_personality 0x9b, C_FUNC(\Handler) // 0x9b == DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4
#else
.cfi_personality 0x1b, C_FUNC(\Handler) // 0x1b == DW_EH_PE_pcrel | DW_EH_PE_sdata4
#endif
.endif
.endm
.macro NESTED_END Name, Section
LEAF_END \Name, \Section
#if defined(__APPLE__)
.set LOCAL_LABEL(\Name\()_Size), . - C_FUNC(\Name)
.section __LD,__compact_unwind,regular,debug
.quad C_FUNC(\Name)
.long LOCAL_LABEL(\Name\()_Size)
.long 0x04000000 # DWARF
.quad 0
.quad 0
#endif
.endm
.macro PATCH_LABEL Name
.global C_FUNC(\Name)
C_FUNC(\Name):
.endm
.macro LEAF_ENTRY Name, Section
.global C_FUNC(\Name)
#if defined(__APPLE__)
.text
#else
.type \Name, %function
#endif
C_FUNC(\Name):
.cfi_startproc
.endm
.macro LEAF_END Name, Section
#if !defined(__APPLE__)
.size \Name, .-\Name
#endif
.cfi_endproc
.endm
.macro LEAF_END_MARKED Name, Section
C_FUNC(\Name\()_End):
.global C_FUNC(\Name\()_End)
LEAF_END \Name, \Section
.endm
.macro NOP_6_BYTE
.byte 0x66
.byte 0x0F
.byte 0x1F
.byte 0x44
.byte 0x00
.byte 0x00
.endm
.macro NOP_3_BYTE
nop dword ptr [rax]
.endm
.macro NOP_2_BYTE
xchg ax, ax
.endm
.macro REPRET
.byte 0xf3
.byte 0xc3
.endm
.macro TAILJMP_RAX
.byte 0x48
.byte 0xFF
.byte 0xE0
.endm
.macro PREPARE_EXTERNAL_VAR Name, HelperReg
mov \HelperReg, [rip + C_FUNC(\Name)@GOTPCREL]
.endm
.macro push_nonvol_reg Register
push \Register
.cfi_adjust_cfa_offset 8
.cfi_rel_offset \Register, 0
.endm
.macro pop_nonvol_reg Register
pop \Register
.cfi_adjust_cfa_offset -8
.cfi_restore \Register
.endm
.macro alloc_stack Size
.att_syntax
lea -(\Size)(%rsp), %rsp
.intel_syntax noprefix
.cfi_adjust_cfa_offset \Size
.endm
.macro free_stack Size
.att_syntax
lea \Size(%rsp), %rsp
.intel_syntax noprefix
.cfi_adjust_cfa_offset -\Size
.endm
.macro set_cfa_register Reg, Offset
.cfi_def_cfa_register \Reg
.cfi_def_cfa_offset \Offset
.endm
.macro save_reg_postrsp Reg, Offset
__Offset = \Offset
mov qword ptr [rsp + __Offset], \Reg
.cfi_rel_offset \Reg, __Offset
.endm
.macro restore_reg Reg, Offset
__Offset = \Offset
mov \Reg, [rsp + __Offset]
.cfi_restore \Reg
.endm
.macro save_xmm128_postrsp Reg, Offset
__Offset = \Offset
movdqa xmmword ptr [rsp + __Offset], \Reg
// NOTE: We cannot use ".cfi_rel_offset \Reg, __Offset" here,
// the xmm registers are not supported by the libunwind
.endm
.macro restore_xmm128 Reg, ofs
__Offset = \ofs
movdqa \Reg, xmmword ptr [rsp + __Offset]
// NOTE: We cannot use ".cfi_restore \Reg" here,
// the xmm registers are not supported by the libunwind
.endm
.macro PUSH_CALLEE_SAVED_REGISTERS
push_register rbp
push_register rbx
push_register r15
push_register r14
push_register r13
push_register r12
.endm
.macro POP_CALLEE_SAVED_REGISTERS
pop_nonvol_reg r12
pop_nonvol_reg r13
pop_nonvol_reg r14
pop_nonvol_reg r15
pop_nonvol_reg rbx
pop_nonvol_reg rbp
.endm
.macro push_register Reg
push \Reg
.cfi_adjust_cfa_offset 8
.endm
.macro push_eflags
pushfq
.cfi_adjust_cfa_offset 8
.endm
.macro push_argument_register Reg
push_register \Reg
.endm
.macro PUSH_ARGUMENT_REGISTERS
push_argument_register r9
push_argument_register r8
push_argument_register rcx
push_argument_register rdx
push_argument_register rsi
push_argument_register rdi
.endm
.macro pop_register Reg
pop \Reg
.cfi_adjust_cfa_offset -8
.endm
.macro pop_eflags
popfq
.cfi_adjust_cfa_offset -8
.endm
.macro pop_argument_register Reg
pop_register \Reg
.endm
.macro POP_ARGUMENT_REGISTERS
pop_argument_register rdi
pop_argument_register rsi
pop_argument_register rdx
pop_argument_register rcx
pop_argument_register r8
pop_argument_register r9
.endm
.macro SAVE_FLOAT_ARGUMENT_REGISTERS ofs
save_xmm128_postrsp xmm0, \ofs
save_xmm128_postrsp xmm1, \ofs + 0x10
save_xmm128_postrsp xmm2, \ofs + 0x20
save_xmm128_postrsp xmm3, \ofs + 0x30
save_xmm128_postrsp xmm4, \ofs + 0x40
save_xmm128_postrsp xmm5, \ofs + 0x50
save_xmm128_postrsp xmm6, \ofs + 0x60
save_xmm128_postrsp xmm7, \ofs + 0x70
.endm
.macro RESTORE_FLOAT_ARGUMENT_REGISTERS ofs
restore_xmm128 xmm0, \ofs
restore_xmm128 xmm1, \ofs + 0x10
restore_xmm128 xmm2, \ofs + 0x20
restore_xmm128 xmm3, \ofs + 0x30
restore_xmm128 xmm4, \ofs + 0x40
restore_xmm128 xmm5, \ofs + 0x50
restore_xmm128 xmm6, \ofs + 0x60
restore_xmm128 xmm7, \ofs + 0x70
.endm
// Stack layout:
//
// (stack parameters)
// ...
// return address
// CalleeSavedRegisters::rbp
// CalleeSavedRegisters::rbx
// CalleeSavedRegisters::r15
// CalleeSavedRegisters::r14
// CalleeSavedRegisters::r13
// CalleeSavedRegisters::r12
// ArgumentRegisters::r9
// ArgumentRegisters::r8
// ArgumentRegisters::rcx
// ArgumentRegisters::rdx
// ArgumentRegisters::rsi
// ArgumentRegisters::rdi <- __PWTB_StackAlloc, __PWTB_TransitionBlock
// padding to align xmm save area
// xmm7
// xmm6
// xmm5
// xmm4
// xmm3
// xmm2
// xmm1
// xmm0 <- __PWTB_FloatArgumentRegisters
// extra locals + padding to qword align
.macro PROLOG_WITH_TRANSITION_BLOCK extraLocals = 0, stackAllocOnEntry = 0, stackAllocSpill1, stackAllocSpill2, stackAllocSpill3
set_cfa_register rsp, 8
__PWTB_FloatArgumentRegisters = \extraLocals
.if ((__PWTB_FloatArgumentRegisters % 16) != 0)
__PWTB_FloatArgumentRegisters = __PWTB_FloatArgumentRegisters + 8
.endif
__PWTB_StackAlloc = __PWTB_FloatArgumentRegisters + 8 * 16 + 8 // 8 floating point registers
__PWTB_TransitionBlock = __PWTB_StackAlloc
.if \stackAllocOnEntry >= 4*8
.error "Max supported stackAllocOnEntry is 3*8"
.endif
.if \stackAllocOnEntry > 0
.cfi_adjust_cfa_offset \stackAllocOnEntry
.endif
// PUSH_CALLEE_SAVED_REGISTERS expanded here
.if \stackAllocOnEntry < 8
push_nonvol_reg rbp
mov rbp, rsp
.endif
.if \stackAllocOnEntry < 2*8
push_nonvol_reg rbx
.endif
.if \stackAllocOnEntry < 3*8
push_nonvol_reg r15
.endif
push_nonvol_reg r14
push_nonvol_reg r13
push_nonvol_reg r12
// ArgumentRegisters
PUSH_ARGUMENT_REGISTERS
.if \stackAllocOnEntry >= 3*8
mov \stackAllocSpill3, [rsp + 0x48]
save_reg_postrsp r15, 0x48
.endif
.if \stackAllocOnEntry >= 2*8
mov \stackAllocSpill2, [rsp + 0x50]
save_reg_postrsp rbx, 0x50
.endif
.if \stackAllocOnEntry >= 8
mov \stackAllocSpill1, [rsp + 0x58]
save_reg_postrsp rbp, 0x58
lea rbp, [rsp + 0x58]
.endif
alloc_stack __PWTB_StackAlloc
SAVE_FLOAT_ARGUMENT_REGISTERS __PWTB_FloatArgumentRegisters
END_PROLOGUE
.endm
.macro EPILOG_WITH_TRANSITION_BLOCK_RETURN
free_stack __PWTB_StackAlloc
POP_ARGUMENT_REGISTERS
POP_CALLEE_SAVED_REGISTERS
ret
.endm
.macro EPILOG_WITH_TRANSITION_BLOCK_TAILCALL
RESTORE_FLOAT_ARGUMENT_REGISTERS __PWTB_FloatArgumentRegisters
free_stack __PWTB_StackAlloc
POP_ARGUMENT_REGISTERS
POP_CALLEE_SAVED_REGISTERS
.endm
.macro RESET_FRAME_WITH_RBP
mov rsp, rbp
set_cfa_register rsp, 16
pop_nonvol_reg rbp
.cfi_same_value rbp
.endm
|
