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Use RLE (Run Length Encoding) to improve debugging performance.
[mirror_edk2.git] / SourceLevelDebugPkg / Library / DebugAgent / DebugAgentCommon / X64 / AsmFuncs.asm
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1;------------------------------------------------------------------------------\r
2;\r
3; Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.<BR>\r
4; This program and the accompanying materials\r
5; are licensed and made available under the terms and conditions of the BSD License\r
6; which accompanies this distribution. The full text of the license may be found at\r
7; http://opensource.org/licenses/bsd-license.php.\r
8;\r
9; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
10; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
11;\r
12; Module Name:\r
13;\r
14; AsmFuncs.asm\r
15;\r
16; Abstract:\r
17;\r
18; Debug interrupt handle functions.\r
19;\r
20;------------------------------------------------------------------------------\r
21\r
22#include "DebugException.h"\r
23\r
24\r
25externdef InterruptProcess:near\r
26\r
27data SEGMENT\r
28\r
29public Exception0Handle, TimerInterruptHandle, ExceptionStubHeaderSize\r
30\r
31AGENT_HANDLER_SIGNATURE MACRO\r
32 db 41h, 47h, 54h, 48h ; SIGNATURE_32('A','G','T','H')\r
33ENDM\r
34\r
35ExceptionStubHeaderSize dd Exception1Handle - Exception0Handle ;\r
36CommonEntryAddr dq CommonEntry ;\r
37\r
38.code\r
39\r
40AGENT_HANDLER_SIGNATURE\r
41Exception0Handle:\r
42 cli\r
43 push rcx\r
44 mov rcx, 0\r
45 jmp qword ptr [CommonEntryAddr]\r
46AGENT_HANDLER_SIGNATURE \r
47Exception1Handle:\r
48 cli\r
49 push rcx\r
50 mov rcx, 1\r
51 jmp qword ptr [CommonEntryAddr]\r
52AGENT_HANDLER_SIGNATURE\r
53Exception2Handle:\r
54 cli\r
55 push rcx\r
56 mov rcx, 2\r
57 jmp qword ptr [CommonEntryAddr]\r
58AGENT_HANDLER_SIGNATURE\r
59Exception3Handle:\r
60 cli\r
61 push rcx\r
62 mov rcx, 3\r
63 jmp qword ptr [CommonEntryAddr]\r
64AGENT_HANDLER_SIGNATURE\r
65Exception4Handle:\r
66 cli\r
67 push rcx\r
68 mov rcx, 4\r
69 jmp qword ptr [CommonEntryAddr]\r
70AGENT_HANDLER_SIGNATURE\r
71Exception5Handle:\r
72 cli\r
73 push rcx\r
74 mov rcx, 5\r
75 jmp qword ptr [CommonEntryAddr]\r
76AGENT_HANDLER_SIGNATURE\r
77Exception6Handle:\r
78 cli\r
79 push rcx\r
80 mov rcx, 6\r
81 jmp qword ptr [CommonEntryAddr]\r
82AGENT_HANDLER_SIGNATURE\r
83Exception7Handle:\r
84 cli\r
85 push rcx\r
86 mov rcx, 7\r
87 jmp qword ptr [CommonEntryAddr]\r
88AGENT_HANDLER_SIGNATURE\r
89Exception8Handle:\r
90 cli\r
91 push rcx\r
92 mov rcx, 8\r
93 jmp qword ptr [CommonEntryAddr]\r
94AGENT_HANDLER_SIGNATURE\r
95Exception9Handle:\r
96 cli\r
97 push rcx\r
98 mov rcx, 9\r
99 jmp qword ptr [CommonEntryAddr]\r
100AGENT_HANDLER_SIGNATURE\r
101Exception10Handle:\r
102 cli\r
103 push rcx\r
104 mov rcx, 10\r
105 jmp qword ptr [CommonEntryAddr]\r
106AGENT_HANDLER_SIGNATURE\r
107Exception11Handle:\r
108 cli\r
109 push rcx\r
110 mov rcx, 11\r
111 jmp qword ptr [CommonEntryAddr]\r
112AGENT_HANDLER_SIGNATURE\r
113Exception12Handle:\r
114 cli\r
115 push rcx\r
116 mov rcx, 12\r
117 jmp qword ptr [CommonEntryAddr]\r
118AGENT_HANDLER_SIGNATURE\r
119Exception13Handle:\r
120 cli\r
121 push rcx\r
122 mov rcx, 13\r
123 jmp qword ptr [CommonEntryAddr]\r
124AGENT_HANDLER_SIGNATURE\r
125Exception14Handle:\r
126 cli\r
127 push rcx\r
128 mov rcx, 14\r
129 jmp qword ptr [CommonEntryAddr]\r
130AGENT_HANDLER_SIGNATURE\r
131Exception15Handle:\r
132 cli\r
133 push rcx\r
134 mov rcx, 15\r
135 jmp qword ptr [CommonEntryAddr]\r
136AGENT_HANDLER_SIGNATURE\r
137Exception16Handle:\r
138 cli\r
139 push rcx\r
140 mov rcx, 16\r
141 jmp qword ptr [CommonEntryAddr]\r
142AGENT_HANDLER_SIGNATURE\r
143Exception17Handle:\r
144 cli\r
145 push rcx\r
146 mov rcx, 17\r
147 jmp qword ptr [CommonEntryAddr]\r
148AGENT_HANDLER_SIGNATURE\r
149Exception18Handle:\r
150 cli\r
151 push rcx\r
152 mov rcx, 18\r
153 jmp qword ptr [CommonEntryAddr]\r
154AGENT_HANDLER_SIGNATURE\r
155Exception19Handle:\r
156 cli\r
157 push rcx\r
158 mov rcx, 19\r
159 jmp qword ptr [CommonEntryAddr]\r
160AGENT_HANDLER_SIGNATURE\r
161TimerInterruptHandle:\r
162 cli\r
163 push rcx\r
164 mov rcx, 32\r
165 jmp qword ptr [CommonEntryAddr]\r
166\r
167CommonEntry:\r
168 ; We need to determine if any extra data was pushed by the exception\r
169 cmp rcx, DEBUG_EXCEPT_DOUBLE_FAULT\r
170 je NoExtrPush\r
171 cmp rcx, DEBUG_EXCEPT_INVALID_TSS\r
172 je NoExtrPush\r
173 cmp rcx, DEBUG_EXCEPT_SEG_NOT_PRESENT\r
174 je NoExtrPush\r
175 cmp rcx, DEBUG_EXCEPT_STACK_FAULT\r
176 je NoExtrPush\r
177 cmp rcx, DEBUG_EXCEPT_GP_FAULT\r
178 je NoExtrPush\r
179 cmp rcx, DEBUG_EXCEPT_PAGE_FAULT\r
180 je NoExtrPush\r
181 cmp rcx, DEBUG_EXCEPT_ALIGNMENT_CHECK\r
182 je NoExtrPush\r
183\r
184 push [rsp]\r
185 mov qword ptr [rsp + 8], 0\r
186\r
187NoExtrPush:\r
188 push rbp\r
189 mov rbp, rsp\r
190\r
191 ; store UINT64 r8, r9, r10, r11, r12, r13, r14, r15;\r
192 push r15\r
193 push r14\r
194 push r13\r
195 push r12\r
196 push r11\r
197 push r10\r
198 push r9\r
199 push r8\r
200\r
201 mov r8, cr8\r
202 push r8\r
203\r
204 ; store UINT64 Rdi, Rsi, Rbp, Rsp, Rdx, Rcx, Rbx, Rax;\r
205 push rax\r
206 push rbx\r
207 push qword ptr [rbp + 8] ; original rcx\r
208 push rdx\r
209 push qword ptr [rbp + 6 * 8] ; original rsp\r
210 push qword ptr [rbp] ; original rbp\r
211 push rsi\r
212 push rdi\r
213\r
214 ;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;\r
215 ;; insure FXSAVE/FXRSTOR is enabled in CR4...\r
216 ;; ... while we're at it, make sure DE is also enabled...\r
217 mov rax, cr4\r
218 or rax, 208h\r
219 mov cr4, rax\r
220 push rax\r
221 mov rax, cr3\r
222 push rax\r
223 mov rax, cr2\r
224 push rax\r
225 push 0\r
226 mov rax, cr0\r
227 push rax\r
228\r
229 xor rax, rax\r
230 mov rax, Ss\r
231 push rax\r
232 mov rax, Cs\r
233 push rax\r
234 mov rax, Ds\r
235 push rax\r
236 mov rax, Es\r
237 push rax\r
238 mov rax, Fs\r
239 push rax\r
240 mov rax, Gs\r
241 push rax\r
242\r
243 ;; EIP\r
244 mov rax, [rbp + 8 * 3] ; EIP\r
245 push rax\r
246\r
247 ;; UINT64 Gdtr[2], Idtr[2];\r
248 sub rsp, 16\r
249 sidt fword ptr [rsp]\r
250 sub rsp, 16\r
251 sgdt fword ptr [rsp]\r
252\r
253 ;; UINT64 Ldtr, Tr;\r
254 xor rax, rax\r
255 str ax\r
256 push rax\r
257 sldt ax\r
258 push rax\r
259\r
260 ;; EFlags\r
261 mov rax, [rbp + 8 * 5]\r
262 push rax\r
263\r
264 ;; UINT64 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;\r
265 mov rax, dr7\r
266 push rax\r
267\r
268 ;; clear Dr7 while executing debugger itself\r
269 xor rax, rax\r
270 mov dr7, rax\r
271\r
272 ;; Dr6\r
273 mov rax, dr6\r
274 push rax\r
275\r
276 ;; insure all status bits in dr6 are clear...\r
277 xor rax, rax\r
278 mov dr6, rax\r
279\r
280 mov rax, dr3\r
281 push rax\r
282 mov rax, dr2\r
283 push rax\r
284 mov rax, dr1\r
285 push rax\r
286 mov rax, dr0\r
287 push rax\r
288\r
289 ;; Clear Direction Flag\r
290 cld\r
291\r
292 sub rsp, 512\r
293 mov rdi, rsp\r
294 ;; Clear the buffer\r
295 xor rax, rax\r
296 push rcx\r
297 mov rcx, 64 ;= 512 / 8\r
298 rep stosq\r
299 pop rcx\r
300 mov rdi, rsp\r
301 db 0fh, 0aeh, 00000111y ;fxsave [rdi]\r
302\r
303 ;; save the exception data\r
304 push qword ptr [rbp + 16]\r
305\r
306 ; call the C interrupt process function\r
307 mov rdx, rsp ; Structure\r
308 mov r15, rcx ; save vector in r15\r
309 \r
310 ;\r
311 ; Per X64 calling convention, allocate maximum parameter stack space\r
312 ; and make sure RSP is 16-byte aligned\r
313 ;\r
314 sub rsp, 32 + 8\r
315 call InterruptProcess\r
316 add rsp, 32 + 8\r
317\r
318 ;; skip the exception data\r
319 add rsp, 8\r
320 \r
321 mov rsi, rsp\r
322 db 0fh, 0aeh, 00001110y ; fxrstor [rsi]\r
323 add rsp, 512\r
324\r
325 ;; UINT64 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;\r
326 pop rax\r
327 mov dr0, rax\r
328 pop rax\r
329 mov dr1, rax\r
330 pop rax\r
331 mov dr2, rax\r
332 pop rax\r
333 mov dr3, rax\r
334 ;; skip restore of dr6. We cleared dr6 during the context save.\r
335 add rsp, 8\r
336 pop rax\r
337 mov dr7, rax\r
338\r
339 ;; set EFlags\r
340 pop qword ptr [rbp + 8 * 5]\r
341\r
342 ;; UINT64 Ldtr, Tr;\r
343 ;; UINT64 Gdtr[2], Idtr[2];\r
344 ;; Best not let anyone mess with these particular registers...\r
345 add rsp, 24 * 2\r
346\r
347 ;; UINT64 Eip;\r
348 pop qword ptr [rbp + 8 * 3] ; set EIP in stack\r
349\r
350 ;; UINT64 Gs, Fs, Es, Ds, Cs, Ss;\r
351 ;; NOTE - modified segment registers could hang the debugger... We\r
352 ;; could attempt to insulate ourselves against this possibility,\r
353 ;; but that poses risks as well.\r
354 ;;\r
355 pop rax\r
356 pop rax\r
357 pop rax\r
358 mov es, rax\r
359 pop rax\r
360 mov ds, rax\r
361 pop qword ptr [rbp + 8 * 4] ; Set CS in stack\r
362 pop rax\r
363 mov ss, rax\r
364\r
365 ;; UINT64 Cr0, Cr1, Cr2, Cr3, Cr4;\r
366 pop rax\r
367 mov cr0, rax\r
368 add rsp, 8 ; skip for Cr1\r
369 pop rax\r
370 mov cr2, rax\r
371 pop rax\r
372 mov cr3, rax\r
373 pop rax\r
374 mov cr4, rax\r
375\r
376 ;; restore general register\r
377 pop rdi\r
378 pop rsi\r
379 add rsp, 8 ; skip rbp\r
380 add rsp, 8 ; skip rsp\r
381 pop rdx\r
382 pop rcx\r
383 pop rbx\r
384 pop rax\r
385\r
386 pop r8\r
387 mov cr8, r8\r
388\r
389 ; store UINT64 r8, r9, r10, r11, r12, r13, r14, r15;\r
390 pop r8\r
391 pop r9\r
392 pop r10\r
393 pop r11\r
394 pop r12\r
395 pop r13\r
396 pop r14\r
397 pop r15\r
398\r
399 mov rsp, rbp\r
400 pop rbp\r
401 add rsp, 16 ; skip rcx and error code\r
402\r
403 iretq\r
404\r
405END\r
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