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1e57a462 | 1 | /** @file\r |
2 | Processor specific parts of the GDB stub\r | |
3 | \r | |
4 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r | |
3402aac7 | 5 | \r |
878b807a | 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
1e57a462 | 7 | \r |
8 | **/\r | |
9 | \r | |
10 | #include <GdbStubInternal.h>\r | |
11 | \r | |
12 | //\r | |
13 | // Array of exception types that need to be hooked by the debugger\r | |
14 | // {EFI mapping, GDB mapping}\r | |
15 | //\r | |
16 | EFI_EXCEPTION_TYPE_ENTRY gExceptionType[] = {\r | |
3402aac7 | 17 | { EXCEPT_IA32_DIVIDE_ERROR, GDB_SIGFPE },\r |
1e57a462 | 18 | { EXCEPT_IA32_DEBUG, GDB_SIGTRAP },\r |
19 | { EXCEPT_IA32_NMI, GDB_SIGEMT },\r | |
20 | { EXCEPT_IA32_BREAKPOINT, GDB_SIGTRAP },\r | |
21 | { EXCEPT_IA32_OVERFLOW, GDB_SIGSEGV },\r | |
22 | { EXCEPT_IA32_BOUND, GDB_SIGSEGV },\r | |
23 | { EXCEPT_IA32_INVALID_OPCODE, GDB_SIGILL },\r | |
24 | { EXCEPT_IA32_DOUBLE_FAULT, GDB_SIGEMT },\r | |
25 | { EXCEPT_IA32_STACK_FAULT, GDB_SIGSEGV },\r | |
26 | { EXCEPT_IA32_GP_FAULT, GDB_SIGSEGV },\r | |
27 | { EXCEPT_IA32_PAGE_FAULT, GDB_SIGSEGV },\r | |
28 | { EXCEPT_IA32_FP_ERROR, GDB_SIGEMT },\r | |
29 | { EXCEPT_IA32_ALIGNMENT_CHECK, GDB_SIGEMT },\r | |
30 | { EXCEPT_IA32_MACHINE_CHECK, GDB_SIGEMT }\r | |
31 | };\r | |
32 | \r | |
33 | \r | |
34 | // The offsets of registers SystemContext.\r | |
35 | // The fields in the array are in the gdb ordering.\r | |
36 | //\r | |
37 | //16 regs\r | |
38 | UINTN gRegisterOffsets[] = {\r | |
39 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Eax),\r | |
40 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Ecx),\r | |
41 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Edx),\r | |
42 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Ebx),\r | |
43 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Esp),\r | |
44 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Ebp),\r | |
45 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Esi),\r | |
46 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Edi),\r | |
47 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Eip),\r | |
48 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Eflags),\r | |
49 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Cs),\r | |
50 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Ss),\r | |
51 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Ds),\r | |
52 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Es),\r | |
53 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Fs),\r | |
54 | OFFSET_OF(EFI_SYSTEM_CONTEXT_IA32, Gs)\r | |
55 | };\r | |
56 | \r | |
57 | \r | |
58 | //Debug only..\r | |
3402aac7 | 59 | VOID\r |
1e57a462 | 60 | PrintReg (\r |
61 | IN EFI_SYSTEM_CONTEXT SystemContext\r | |
62 | )\r | |
63 | {\r | |
64 | Print ((CHAR16 *)L"EAX: %x ", SystemContext.SystemContextIa32->Eax);\r | |
65 | Print ((CHAR16 *)L"ECX: %x ", SystemContext.SystemContextIa32->Ecx);\r | |
66 | Print ((CHAR16 *)L"EDX: %x ", SystemContext.SystemContextIa32->Edx);\r | |
67 | Print ((CHAR16 *)L"EBX: %x ", SystemContext.SystemContextIa32->Ebx);\r | |
68 | Print ((CHAR16 *)L"ESP: %x ", SystemContext.SystemContextIa32->Esp);\r | |
69 | Print ((CHAR16 *)L"EBP: %x ", SystemContext.SystemContextIa32->Ebp);\r | |
70 | Print ((CHAR16 *)L"ESI: %x ", SystemContext.SystemContextIa32->Esi);\r | |
71 | Print ((CHAR16 *)L"EDI: %x ", SystemContext.SystemContextIa32->Edi);\r | |
72 | Print ((CHAR16 *)L"EIP: %x\n", SystemContext.SystemContextIa32->Eip);\r | |
73 | Print ((CHAR16 *)L"EFlags: %x\n", SystemContext.SystemContextIa32->Eflags);\r | |
74 | }\r | |
75 | \r | |
76 | //Debug only..\r | |
3402aac7 | 77 | VOID\r |
1e57a462 | 78 | PrintDRreg (\r |
79 | IN EFI_SYSTEM_CONTEXT SystemContext\r | |
80 | )\r | |
81 | {\r | |
82 | Print ((CHAR16 *)L"DR0: %x ", SystemContext.SystemContextIa32->Dr0);\r | |
83 | Print ((CHAR16 *)L"DR1: %x ", SystemContext.SystemContextIa32->Dr1);\r | |
84 | Print ((CHAR16 *)L"DR2: %x ", SystemContext.SystemContextIa32->Dr2);\r | |
85 | Print ((CHAR16 *)L"DR3: %x ", SystemContext.SystemContextIa32->Dr3);\r | |
86 | Print ((CHAR16 *)L"DR6: %x ", SystemContext.SystemContextIa32->Dr6);\r | |
87 | Print ((CHAR16 *)L"DR7: %x\n", SystemContext.SystemContextIa32->Dr7);\r | |
88 | }\r | |
89 | \r | |
90 | \r | |
91 | /**\r | |
92 | Return the number of entries in the gExceptionType[]\r | |
3402aac7 RC |
93 | \r |
94 | @retval UINTN, the number of entries in the gExceptionType[] array.\r | |
1e57a462 | 95 | **/\r |
96 | UINTN\r | |
97 | MaxEfiException (\r | |
98 | VOID\r | |
99 | )\r | |
100 | {\r | |
101 | return sizeof (gExceptionType)/sizeof (EFI_EXCEPTION_TYPE_ENTRY);\r | |
102 | }\r | |
103 | \r | |
104 | \r | |
105 | /**\r | |
106 | Return the number of entries in the gRegisters[]\r | |
3402aac7 RC |
107 | \r |
108 | @retval UINTN, the number of entries (registers) in the gRegisters[] array.\r | |
1e57a462 | 109 | **/\r |
110 | UINTN\r | |
111 | MaxRegisterCount (\r | |
112 | VOID\r | |
113 | )\r | |
114 | {\r | |
115 | return sizeof (gRegisterOffsets)/sizeof (UINTN);\r | |
116 | }\r | |
117 | \r | |
118 | \r | |
119 | /**\r | |
3402aac7 | 120 | Check to see if the ISA is supported.\r |
1e57a462 | 121 | ISA = Instruction Set Architecture\r |
3402aac7 | 122 | \r |
1e57a462 | 123 | @retval TRUE if Isa is supported,\r |
124 | FALSE otherwise.\r | |
125 | **/\r | |
126 | BOOLEAN\r | |
127 | CheckIsa (\r | |
128 | IN EFI_INSTRUCTION_SET_ARCHITECTURE Isa\r | |
129 | )\r | |
130 | {\r | |
131 | return (BOOLEAN)(Isa == IsaIa32);\r | |
132 | }\r | |
133 | \r | |
134 | \r | |
135 | /**\r | |
136 | This takes in the register number and the System Context, and returns a pointer to the RegNumber-th register in gdb ordering\r | |
137 | It is, by default, set to find the register pointer of the IA32 member\r | |
138 | \r | |
3402aac7 | 139 | @param SystemContext Register content at time of the exception\r |
1e57a462 | 140 | @param RegNumber The register to which we want to find a pointer\r |
141 | @retval the pointer to the RegNumber-th pointer\r | |
142 | **/\r | |
143 | UINTN *\r | |
6f711615 | 144 | FindPointerToRegister (\r |
1e57a462 | 145 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
3402aac7 | 146 | IN UINTN RegNumber\r |
1e57a462 | 147 | )\r |
148 | {\r | |
149 | UINT8 *TempPtr;\r | |
150 | TempPtr = ((UINT8 *)SystemContext.SystemContextIa32) + gRegisterOffsets[RegNumber];\r | |
151 | return (UINTN *)TempPtr;\r | |
152 | }\r | |
153 | \r | |
154 | \r | |
155 | /**\r | |
156 | Adds the RegNumber-th register's value to the output buffer, starting at the given OutBufPtr\r | |
157 | \r | |
158 | @param SystemContext Register content at time of the exception\r | |
159 | @param RegNumber the number of the register that we want to read\r | |
160 | @param OutBufPtr pointer to the output buffer's end. the new data will be added from this point on.\r | |
161 | @retval the pointer to the next character of the output buffer that is available to be written on.\r | |
162 | **/\r | |
163 | CHAR8 *\r | |
164 | BasicReadRegister (\r | |
165 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
166 | IN UINTN RegNumber,\r | |
167 | IN CHAR8 *OutBufPtr\r | |
168 | )\r | |
169 | {\r | |
170 | UINTN RegSize;\r | |
3402aac7 | 171 | \r |
1e57a462 | 172 | RegSize = 0;\r |
173 | while (RegSize < REG_SIZE) {\r | |
6f711615 | 174 | *OutBufPtr++ = mHexToStr[((*FindPointerToRegister (SystemContext, RegNumber) >> (RegSize+4)) & 0xf)];\r |
175 | *OutBufPtr++ = mHexToStr[((*FindPointerToRegister (SystemContext, RegNumber) >> RegSize) & 0xf)];\r | |
1e57a462 | 176 | RegSize = RegSize + 8;\r |
177 | }\r | |
178 | return OutBufPtr;\r | |
179 | }\r | |
180 | \r | |
181 | \r | |
3402aac7 RC |
182 | /** ‘p n’\r |
183 | Reads the n-th register's value into an output buffer and sends it as a packet\r | |
1e57a462 | 184 | \r |
185 | @param SystemContext Register content at time of the exception\r | |
186 | @param InBuffer Pointer to the input buffer received from gdb server\r | |
187 | **/\r | |
188 | VOID\r | |
189 | EFIAPI\r | |
190 | ReadNthRegister (\r | |
191 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
192 | IN CHAR8 *InBuffer\r | |
193 | )\r | |
194 | {\r | |
195 | UINTN RegNumber;\r | |
196 | CHAR8 OutBuffer[9]; // 1 reg=8 hex chars, and the end '\0' (escape seq)\r | |
197 | CHAR8 *OutBufPtr; // pointer to the output buffer\r | |
3402aac7 | 198 | \r |
1e57a462 | 199 | RegNumber = AsciiStrHexToUintn (&InBuffer[1]);\r |
200 | \r | |
201 | if ((RegNumber < 0) || (RegNumber >= MaxRegisterCount())) {\r | |
202 | SendError (GDB_EINVALIDREGNUM);\r | |
203 | return;\r | |
204 | }\r | |
205 | \r | |
206 | OutBufPtr = OutBuffer;\r | |
6f711615 | 207 | OutBufPtr = BasicReadRegister (SystemContext, RegNumber, OutBufPtr);\r |
1e57a462 | 208 | \r |
209 | *OutBufPtr = '\0'; // the end of the buffer\r | |
210 | SendPacket(OutBuffer);\r | |
211 | }\r | |
212 | \r | |
213 | \r | |
3402aac7 RC |
214 | /** ‘g’\r |
215 | Reads the general registers into an output buffer and sends it as a packet\r | |
1e57a462 | 216 | \r |
217 | @param SystemContext Register content at time of the exception\r | |
218 | **/\r | |
219 | VOID\r | |
220 | EFIAPI\r | |
3402aac7 | 221 | ReadGeneralRegisters (\r |
1e57a462 | 222 | IN EFI_SYSTEM_CONTEXT SystemContext\r |
223 | )\r | |
224 | {\r | |
225 | UINTN i;\r | |
226 | CHAR8 OutBuffer[129]; // 16 regs, 8 hex chars each, and the end '\0' (escape seq)\r | |
227 | CHAR8 *OutBufPtr; // pointer to the output buffer\r | |
228 | \r | |
229 | OutBufPtr = OutBuffer;\r | |
3402aac7 | 230 | for (i = 0 ; i < MaxRegisterCount() ; i++) { // there are only 16 registers to read\r |
6f711615 | 231 | OutBufPtr = BasicReadRegister (SystemContext, i, OutBufPtr);\r |
1e57a462 | 232 | }\r |
233 | \r | |
234 | *OutBufPtr = '\0'; // the end of the buffer\r | |
235 | SendPacket(OutBuffer);\r | |
236 | }\r | |
237 | \r | |
238 | \r | |
239 | /**\r | |
240 | Adds the RegNumber-th register's value to the output buffer, starting at the given OutBufPtr\r | |
241 | \r | |
242 | @param SystemContext Register content at time of the exception\r | |
243 | @param RegNumber the number of the register that we want to write\r | |
244 | @param InBufPtr pointer to the output buffer. the new data will be extracted from the input buffer from this point on.\r | |
245 | @retval the pointer to the next character of the input buffer that can be used\r | |
246 | **/\r | |
247 | CHAR8 *\r | |
248 | BasicWriteRegister (\r | |
249 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
250 | IN UINTN RegNumber,\r | |
251 | IN CHAR8 *InBufPtr\r | |
252 | )\r | |
253 | {\r | |
254 | UINTN RegSize;\r | |
255 | UINTN TempValue; // the value transferred from a hex char\r | |
256 | UINT32 NewValue; // the new value of the RegNumber-th Register\r | |
3402aac7 | 257 | \r |
1e57a462 | 258 | NewValue = 0;\r |
259 | RegSize = 0;\r | |
260 | while (RegSize < REG_SIZE) {\r | |
261 | TempValue = HexCharToInt(*InBufPtr++);\r | |
3402aac7 | 262 | \r |
1e57a462 | 263 | if (TempValue < 0) {\r |
3402aac7 | 264 | SendError (GDB_EBADMEMDATA);\r |
1e57a462 | 265 | return NULL;\r |
266 | }\r | |
267 | \r | |
268 | NewValue += (TempValue << (RegSize+4));\r | |
269 | TempValue = HexCharToInt(*InBufPtr++);\r | |
3402aac7 | 270 | \r |
1e57a462 | 271 | if (TempValue < 0) {\r |
3402aac7 | 272 | SendError (GDB_EBADMEMDATA);\r |
1e57a462 | 273 | return NULL;\r |
274 | }\r | |
3402aac7 RC |
275 | \r |
276 | NewValue += (TempValue << RegSize);\r | |
1e57a462 | 277 | RegSize = RegSize + 8;\r |
278 | }\r | |
6f711615 | 279 | *(FindPointerToRegister (SystemContext, RegNumber)) = NewValue;\r |
1e57a462 | 280 | return InBufPtr;\r |
281 | }\r | |
282 | \r | |
283 | \r | |
284 | /** ‘P n...=r...’\r | |
285 | Writes the new value of n-th register received into the input buffer to the n-th register\r | |
286 | \r | |
287 | @param SystemContext Register content at time of the exception\r | |
288 | @param InBuffer Ponter to the input buffer received from gdb server\r | |
289 | **/\r | |
290 | VOID\r | |
291 | EFIAPI\r | |
292 | WriteNthRegister (\r | |
293 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
294 | IN CHAR8 *InBuffer\r | |
295 | )\r | |
296 | {\r | |
297 | UINTN RegNumber;\r | |
298 | CHAR8 RegNumBuffer[MAX_REG_NUM_BUF_SIZE]; // put the 'n..' part of the message into this array\r | |
299 | CHAR8 *RegNumBufPtr;\r | |
300 | CHAR8 *InBufPtr; // pointer to the input buffer\r | |
3402aac7 | 301 | \r |
1e57a462 | 302 | // find the register number to write\r |
303 | InBufPtr = &InBuffer[1];\r | |
304 | RegNumBufPtr = RegNumBuffer;\r | |
305 | while (*InBufPtr != '=') {\r | |
306 | *RegNumBufPtr++ = *InBufPtr++;\r | |
3402aac7 | 307 | }\r |
1e57a462 | 308 | *RegNumBufPtr = '\0';\r |
3402aac7 | 309 | RegNumber = AsciiStrHexToUintn (RegNumBuffer);\r |
1e57a462 | 310 | \r |
311 | // check if this is a valid Register Number\r | |
312 | if ((RegNumber < 0) || (RegNumber >= MaxRegisterCount())) {\r | |
91c38d4e | 313 | SendError (GDB_EINVALIDREGNUM);\r |
1e57a462 | 314 | return;\r |
315 | }\r | |
316 | InBufPtr++; // skips the '=' character\r | |
317 | BasicWriteRegister (SystemContext, RegNumber, InBufPtr);\r | |
318 | SendSuccess();\r | |
319 | }\r | |
320 | \r | |
321 | \r | |
322 | /** ‘G XX...’\r | |
323 | Writes the new values received into the input buffer to the general registers\r | |
324 | \r | |
325 | @param SystemContext Register content at time of the exception\r | |
326 | @param InBuffer Pointer to the input buffer received from gdb server\r | |
327 | **/\r | |
328 | VOID\r | |
329 | EFIAPI\r | |
330 | WriteGeneralRegisters (\r | |
331 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
332 | IN CHAR8 *InBuffer\r | |
333 | )\r | |
334 | {\r | |
335 | UINTN i;\r | |
336 | CHAR8 *InBufPtr; /// pointer to the input buffer\r | |
337 | \r | |
3402aac7 RC |
338 | // check to see if the buffer is the right size which is\r |
339 | // 1 (for 'G') + 16 (for 16 registers) * 8 ( for 8 hex chars each) = 129\r | |
1e57a462 | 340 | if (AsciiStrLen(InBuffer) != 129) { // 16 regs, 8 hex chars each, and the end '\0' (escape seq)\r |
91c38d4e | 341 | //Bad message. Message is not the right length\r |
3402aac7 | 342 | SendError (GDB_EBADBUFSIZE);\r |
1e57a462 | 343 | return;\r |
344 | }\r | |
345 | \r | |
346 | InBufPtr = &InBuffer[1];\r | |
3402aac7 | 347 | \r |
1e57a462 | 348 | // Read the new values for the registers from the input buffer to an array, NewValueArray.\r |
349 | // The values in the array are in the gdb ordering\r | |
6f711615 | 350 | for (i=0; i < MaxRegisterCount(); i++) { // there are only 16 registers to write\r |
351 | InBufPtr = BasicWriteRegister (SystemContext, i, InBufPtr);\r | |
1e57a462 | 352 | }\r |
353 | \r | |
354 | SendSuccess();\r | |
355 | }\r | |
356 | \r | |
357 | \r | |
3402aac7 | 358 | /**\r |
1e57a462 | 359 | Insert Single Step in the SystemContext\r |
3402aac7 | 360 | \r |
1e57a462 | 361 | @param SystemContext Register content at time of the exception\r |
362 | **/\r | |
363 | VOID\r | |
364 | AddSingleStep (\r | |
365 | IN EFI_SYSTEM_CONTEXT SystemContext\r | |
366 | )\r | |
367 | {\r | |
368 | SystemContext.SystemContextIa32->Eflags |= TF_BIT; //Setting the TF bit.\r | |
369 | }\r | |
370 | \r | |
3402aac7 RC |
371 | \r |
372 | /**\r | |
1e57a462 | 373 | Remove Single Step in the SystemContext\r |
3402aac7 | 374 | \r |
1e57a462 | 375 | @param SystemContext Register content at time of the exception\r |
376 | **/\r | |
377 | VOID\r | |
378 | RemoveSingleStep (\r | |
379 | IN EFI_SYSTEM_CONTEXT SystemContext\r | |
380 | )\r | |
381 | {\r | |
382 | SystemContext.SystemContextIa32->Eflags &= ~TF_BIT; // clearing the TF bit.\r | |
383 | }\r | |
384 | \r | |
385 | \r | |
386 | \r | |
3402aac7 RC |
387 | /** ‘c [addr ]’\r |
388 | Continue. addr is Address to resume. If addr is omitted, resume at current\r | |
1e57a462 | 389 | Address.\r |
3402aac7 RC |
390 | \r |
391 | @param SystemContext Register content at time of the exception\r | |
1e57a462 | 392 | **/\r |
393 | VOID\r | |
394 | EFIAPI\r | |
395 | ContinueAtAddress (\r | |
396 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
397 | IN CHAR8 *PacketData\r | |
398 | )\r | |
399 | {\r | |
400 | if (PacketData[1] != '\0') {\r | |
401 | SystemContext.SystemContextIa32->Eip = AsciiStrHexToUintn (&PacketData[1]);\r | |
3402aac7 | 402 | }\r |
1e57a462 | 403 | }\r |
404 | \r | |
405 | \r | |
406 | /** ‘s [addr ]’\r | |
3402aac7 | 407 | Single step. addr is the Address at which to resume. If addr is omitted, resume\r |
1e57a462 | 408 | at same Address.\r |
3402aac7 RC |
409 | \r |
410 | @param SystemContext Register content at time of the exception\r | |
1e57a462 | 411 | **/\r |
412 | VOID\r | |
413 | EFIAPI\r | |
414 | SingleStep (\r | |
415 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
416 | IN CHAR8 *PacketData\r | |
417 | )\r | |
418 | {\r | |
419 | if (PacketData[1] != '\0') {\r | |
420 | SystemContext.SystemContextIa32->Eip = AsciiStrHexToUintn (&PacketData[1]);\r | |
421 | }\r | |
3402aac7 | 422 | \r |
1e57a462 | 423 | AddSingleStep (SystemContext);\r |
424 | }\r | |
425 | \r | |
426 | \r | |
427 | /**\r | |
428 | Returns breakpoint data address from DR0-DR3 based on the input breakpoint number\r | |
429 | \r | |
430 | @param SystemContext Register content at time of the exception\r | |
431 | @param BreakpointNumber Breakpoint number\r | |
432 | \r | |
433 | @retval Address Data address from DR0-DR3 based on the breakpoint number.\r | |
434 | \r | |
435 | **/\r | |
436 | UINTN\r | |
437 | GetBreakpointDataAddress (\r | |
438 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
439 | IN UINTN BreakpointNumber\r | |
440 | )\r | |
441 | {\r | |
442 | UINTN Address;\r | |
443 | \r | |
444 | if (BreakpointNumber == 1) {\r | |
445 | Address = SystemContext.SystemContextIa32->Dr0;\r | |
446 | } else if (BreakpointNumber == 2) {\r | |
447 | Address = SystemContext.SystemContextIa32->Dr1;\r | |
448 | } else if (BreakpointNumber == 3) {\r | |
449 | Address = SystemContext.SystemContextIa32->Dr2;\r | |
450 | } else if (BreakpointNumber == 4) {\r | |
451 | Address = SystemContext.SystemContextIa32->Dr3;\r | |
452 | } else {\r | |
453 | Address = 0;\r | |
454 | }\r | |
455 | \r | |
456 | return Address;\r | |
457 | }\r | |
458 | \r | |
459 | \r | |
460 | /**\r | |
461 | Returns currently detected breakpoint value based on the register DR6 B0-B3 field.\r | |
462 | If no breakpoint is detected then it returns 0.\r | |
463 | \r | |
464 | @param SystemContext Register content at time of the exception\r | |
465 | \r | |
3402aac7 | 466 | @retval {1-4} Currently detected breakpoint value\r |
1e57a462 | 467 | @retval 0 No breakpoint detected.\r |
3402aac7 | 468 | \r |
1e57a462 | 469 | **/\r |
470 | UINTN\r | |
471 | GetBreakpointDetected (\r | |
472 | IN EFI_SYSTEM_CONTEXT SystemContext\r | |
473 | )\r | |
474 | {\r | |
475 | IA32_DR6 Dr6;\r | |
476 | UINTN BreakpointNumber;\r | |
477 | \r | |
478 | Dr6.UintN = SystemContext.SystemContextIa32->Dr6;\r | |
479 | \r | |
480 | if (Dr6.Bits.B0 == 1) {\r | |
481 | BreakpointNumber = 1;\r | |
482 | } else if (Dr6.Bits.B1 == 1) {\r | |
483 | BreakpointNumber = 2;\r | |
484 | } else if (Dr6.Bits.B2 == 1) {\r | |
485 | BreakpointNumber = 3;\r | |
486 | } else if (Dr6.Bits.B3 == 1) {\r | |
487 | BreakpointNumber = 4;\r | |
488 | } else {\r | |
3402aac7 | 489 | BreakpointNumber = 0; //No breakpoint detected\r |
1e57a462 | 490 | }\r |
491 | \r | |
492 | return BreakpointNumber;\r | |
493 | }\r | |
494 | \r | |
495 | \r | |
496 | /**\r | |
497 | Returns Breakpoint type (InstructionExecution, DataWrite, DataRead or DataReadWrite)\r | |
498 | based on the Breakpoint number\r | |
3402aac7 | 499 | \r |
1e57a462 | 500 | @param SystemContext Register content at time of the exception\r |
501 | @param BreakpointNumber Breakpoint number\r | |
3402aac7 | 502 | \r |
1e57a462 | 503 | @retval BREAK_TYPE Breakpoint type value read from register DR7 RWn field\r |
504 | For unknown value, it returns NotSupported.\r | |
3402aac7 | 505 | \r |
1e57a462 | 506 | **/\r |
507 | BREAK_TYPE\r | |
508 | GetBreakpointType (\r | |
509 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
510 | IN UINTN BreakpointNumber\r | |
511 | )\r | |
512 | {\r | |
513 | IA32_DR7 Dr7;\r | |
514 | BREAK_TYPE Type = NotSupported; //Default is NotSupported type\r | |
515 | \r | |
516 | Dr7.UintN = SystemContext.SystemContextIa32->Dr7;\r | |
517 | \r | |
518 | if (BreakpointNumber == 1) {\r | |
3402aac7 | 519 | Type = (BREAK_TYPE) Dr7.Bits.RW0;\r |
1e57a462 | 520 | } else if (BreakpointNumber == 2) {\r |
3402aac7 | 521 | Type = (BREAK_TYPE) Dr7.Bits.RW1;\r |
1e57a462 | 522 | } else if (BreakpointNumber == 3) {\r |
3402aac7 | 523 | Type = (BREAK_TYPE) Dr7.Bits.RW2;\r |
1e57a462 | 524 | } else if (BreakpointNumber == 4) {\r |
3402aac7 | 525 | Type = (BREAK_TYPE) Dr7.Bits.RW3;\r |
1e57a462 | 526 | }\r |
527 | \r | |
528 | return Type;\r | |
529 | }\r | |
530 | \r | |
531 | \r | |
3402aac7 | 532 | /**\r |
1e57a462 | 533 | Parses Length and returns the length which DR7 LENn field accepts.\r |
3402aac7 | 534 | For example: If we receive 1-Byte length then we should return 0.\r |
1e57a462 | 535 | Zero gets written to DR7 LENn field.\r |
536 | \r | |
537 | @param Length Breakpoint length in Bytes (1 byte, 2 byte, 4 byte)\r | |
538 | \r | |
539 | @retval Length Appropriate converted values which DR7 LENn field accepts.\r | |
540 | \r | |
541 | **/\r | |
542 | UINTN\r | |
543 | ConvertLengthData (\r | |
544 | IN UINTN Length\r | |
545 | )\r | |
546 | {\r | |
3402aac7 | 547 | if (Length == 1) { //1-Byte length\r |
1e57a462 | 548 | return 0;\r |
549 | } else if (Length == 2) { //2-Byte length\r | |
550 | return 1;\r | |
551 | } else if (Length == 4) { //4-Byte length\r | |
552 | return 3;\r | |
553 | } else { //Undefined or 8-byte length\r | |
554 | return 2;\r | |
555 | }\r | |
556 | }\r | |
557 | \r | |
558 | \r | |
559 | /**\r | |
3402aac7 RC |
560 | Finds the next free debug register. If all the registers are occupied then\r |
561 | EFI_OUT_OF_RESOURCES is returned.\r | |
1e57a462 | 562 | \r |
563 | @param SystemContext Register content at time of the exception\r | |
564 | @param Register Register value (0 - 3 for the first free debug register)\r | |
565 | \r | |
566 | @retval EFI_STATUS Appropriate status value.\r | |
567 | \r | |
568 | **/\r | |
569 | EFI_STATUS\r | |
570 | FindNextFreeDebugRegister (\r | |
571 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
572 | OUT UINTN *Register\r | |
573 | )\r | |
574 | {\r | |
575 | IA32_DR7 Dr7;\r | |
576 | \r | |
577 | Dr7.UintN = SystemContext.SystemContextIa32->Dr7;\r | |
578 | \r | |
579 | if (Dr7.Bits.G0 == 0) {\r | |
580 | *Register = 0;\r | |
581 | } else if (Dr7.Bits.G1 == 0) {\r | |
582 | *Register = 1;\r | |
583 | } else if (Dr7.Bits.G2 == 0) {\r | |
584 | *Register = 2;\r | |
585 | } else if (Dr7.Bits.G3 == 0) {\r | |
586 | *Register = 3;\r | |
587 | } else {\r | |
588 | return EFI_OUT_OF_RESOURCES;\r | |
589 | }\r | |
590 | \r | |
591 | return EFI_SUCCESS;\r | |
592 | }\r | |
593 | \r | |
594 | \r | |
595 | /**\r | |
596 | Enables the debug register. Writes Address value to appropriate DR0-3 register.\r | |
597 | Sets LENn, Gn, RWn bits in DR7 register.\r | |
3402aac7 | 598 | \r |
1e57a462 | 599 | @param SystemContext Register content at time of the exception\r |
3402aac7 | 600 | @param Register Register value (0 - 3)\r |
1e57a462 | 601 | @param Address Breakpoint address value\r |
3402aac7 | 602 | @param Type Breakpoint type (Instruction, Data write, Data read\r |
1e57a462 | 603 | or write etc.)\r |
604 | \r | |
605 | @retval EFI_STATUS Appropriate status value.\r | |
606 | \r | |
607 | **/\r | |
608 | EFI_STATUS\r | |
609 | EnableDebugRegister (\r | |
610 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
611 | IN UINTN Register,\r | |
612 | IN UINTN Address,\r | |
613 | IN UINTN Length,\r | |
614 | IN UINTN Type\r | |
615 | )\r | |
616 | {\r | |
617 | IA32_DR7 Dr7;\r | |
618 | \r | |
619 | //Convert length data\r | |
620 | Length = ConvertLengthData (Length);\r | |
621 | \r | |
3402aac7 | 622 | //For Instruction execution, length should be 0\r |
1e57a462 | 623 | //(Ref. Intel reference manual 18.2.4)\r |
624 | if ((Type == 0) && (Length != 0)) {\r | |
625 | return EFI_INVALID_PARAMETER;\r | |
626 | }\r | |
3402aac7 | 627 | \r |
1e57a462 | 628 | //Hardware doesn't support ReadWatch (z3 packet) type. GDB can handle\r |
629 | //software breakpoint. We should send empty packet in both these cases.\r | |
3402aac7 | 630 | if ((Type == (BREAK_TYPE)DataRead) ||\r |
1e57a462 | 631 | (Type == (BREAK_TYPE)SoftwareBreakpoint)) {\r |
632 | return EFI_UNSUPPORTED;\r | |
633 | }\r | |
634 | \r | |
635 | //Read DR7 so appropriate Gn, RWn and LENn bits can be modified.\r | |
636 | Dr7.UintN = SystemContext.SystemContextIa32->Dr7;\r | |
637 | \r | |
638 | if (Register == 0) {\r | |
639 | SystemContext.SystemContextIa32->Dr0 = Address;\r | |
640 | Dr7.Bits.G0 = 1;\r | |
641 | Dr7.Bits.RW0 = Type;\r | |
642 | Dr7.Bits.LEN0 = Length;\r | |
643 | } else if (Register == 1) {\r | |
644 | SystemContext.SystemContextIa32->Dr1 = Address;\r | |
645 | Dr7.Bits.G1 = 1;\r | |
646 | Dr7.Bits.RW1 = Type;\r | |
647 | Dr7.Bits.LEN1 = Length;\r | |
648 | } else if (Register == 2) {\r | |
649 | SystemContext.SystemContextIa32->Dr2 = Address;\r | |
650 | Dr7.Bits.G2 = 1;\r | |
651 | Dr7.Bits.RW2 = Type;\r | |
652 | Dr7.Bits.LEN2 = Length;\r | |
653 | } else if (Register == 3) {\r | |
654 | SystemContext.SystemContextIa32->Dr3 = Address;\r | |
655 | Dr7.Bits.G3 = 1;\r | |
656 | Dr7.Bits.RW3 = Type;\r | |
657 | Dr7.Bits.LEN3 = Length;\r | |
658 | } else {\r | |
659 | return EFI_INVALID_PARAMETER;\r | |
660 | }\r | |
661 | \r | |
3402aac7 | 662 | //Update Dr7 with appropriate Gn, RWn and LENn bits\r |
1e57a462 | 663 | SystemContext.SystemContextIa32->Dr7 = Dr7.UintN;\r |
664 | \r | |
665 | return EFI_SUCCESS;\r | |
666 | }\r | |
667 | \r | |
668 | \r | |
669 | /**\r | |
670 | Returns register number 0 - 3 for the maching debug register.\r | |
671 | This function compares incoming Address, Type, Length and\r | |
672 | if there is a match then it returns the appropriate register number.\r | |
673 | In case of mismatch, function returns EFI_NOT_FOUND message.\r | |
674 | \r | |
675 | @param SystemContext Register content at time of the exception\r | |
676 | @param Address Breakpoint address value\r | |
677 | @param Length Breakpoint length value\r | |
3402aac7 | 678 | @param Type Breakpoint type (Instruction, Data write,\r |
1e57a462 | 679 | Data read or write etc.)\r |
680 | @param Register Register value to be returned\r | |
681 | \r | |
682 | @retval EFI_STATUS Appropriate status value.\r | |
683 | \r | |
684 | **/\r | |
685 | EFI_STATUS\r | |
686 | FindMatchingDebugRegister (\r | |
687 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
688 | IN UINTN Address,\r | |
689 | IN UINTN Length,\r | |
690 | IN UINTN Type,\r | |
691 | OUT UINTN *Register\r | |
692 | )\r | |
693 | {\r | |
694 | IA32_DR7 Dr7;\r | |
695 | \r | |
696 | //Hardware doesn't support ReadWatch (z3 packet) type. GDB can handle\r | |
697 | //software breakpoint. We should send empty packet in both these cases.\r | |
3402aac7 | 698 | if ((Type == (BREAK_TYPE)DataRead) ||\r |
1e57a462 | 699 | (Type == (BREAK_TYPE)SoftwareBreakpoint)) {\r |
700 | return EFI_UNSUPPORTED;\r | |
701 | }\r | |
702 | \r | |
703 | //Convert length data\r | |
704 | Length = ConvertLengthData(Length);\r | |
705 | \r | |
706 | Dr7.UintN = SystemContext.SystemContextIa32->Dr7;\r | |
707 | \r | |
3402aac7 | 708 | if ((Dr7.Bits.G0 == 1) &&\r |
1e57a462 | 709 | (Dr7.Bits.LEN0 == Length) &&\r |
3402aac7 | 710 | (Dr7.Bits.RW0 == Type) &&\r |
1e57a462 | 711 | (Address == SystemContext.SystemContextIa32->Dr0)) {\r |
712 | *Register = 0;\r | |
3402aac7 | 713 | } else if ((Dr7.Bits.G1 == 1) &&\r |
1e57a462 | 714 | (Dr7.Bits.LEN1 == Length) &&\r |
3402aac7 | 715 | (Dr7.Bits.RW1 == Type) &&\r |
1e57a462 | 716 | (Address == SystemContext.SystemContextIa32->Dr1)) {\r |
717 | *Register = 1;\r | |
3402aac7 | 718 | } else if ((Dr7.Bits.G2 == 1) &&\r |
1e57a462 | 719 | (Dr7.Bits.LEN2 == Length) &&\r |
3402aac7 | 720 | (Dr7.Bits.RW2 == Type) &&\r |
1e57a462 | 721 | (Address == SystemContext.SystemContextIa32->Dr2)) {\r |
722 | *Register = 2;\r | |
3402aac7 | 723 | } else if ((Dr7.Bits.G3 == 1) &&\r |
1e57a462 | 724 | (Dr7.Bits.LEN3 == Length) &&\r |
3402aac7 | 725 | (Dr7.Bits.RW3 == Type) &&\r |
1e57a462 | 726 | (Address == SystemContext.SystemContextIa32->Dr3)) {\r |
727 | *Register = 3;\r | |
728 | } else {\r | |
729 | Print ((CHAR16 *)L"No match found..\n");\r | |
730 | return EFI_NOT_FOUND;\r | |
731 | }\r | |
732 | \r | |
733 | return EFI_SUCCESS;\r | |
734 | }\r | |
735 | \r | |
736 | \r | |
737 | /**\r | |
738 | Disables the particular debug register.\r | |
739 | \r | |
740 | @param SystemContext Register content at time of the exception\r | |
741 | @param Register Register to be disabled\r | |
742 | \r | |
743 | @retval EFI_STATUS Appropriate status value.\r | |
744 | \r | |
745 | **/\r | |
746 | EFI_STATUS\r | |
747 | DisableDebugRegister (\r | |
748 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
3402aac7 | 749 | IN UINTN Register\r |
1e57a462 | 750 | )\r |
751 | {\r | |
752 | IA32_DR7 Dr7;\r | |
753 | UINTN Address = 0;\r | |
3402aac7 | 754 | \r |
1e57a462 | 755 | //Read DR7 register so appropriate Gn, RWn and LENn bits can be turned off.\r |
756 | Dr7.UintN = SystemContext.SystemContextIa32->Dr7;\r | |
757 | \r | |
758 | if (Register == 0) {\r | |
759 | SystemContext.SystemContextIa32->Dr0 = Address;\r | |
760 | Dr7.Bits.G0 = 0;\r | |
761 | Dr7.Bits.RW0 = 0;\r | |
762 | Dr7.Bits.LEN0 = 0;\r | |
763 | } else if (Register == 1) {\r | |
764 | SystemContext.SystemContextIa32->Dr1 = Address;\r | |
765 | Dr7.Bits.G1 = 0;\r | |
766 | Dr7.Bits.RW1 = 0;\r | |
767 | Dr7.Bits.LEN1 = 0;\r | |
768 | } else if (Register == 2) {\r | |
769 | SystemContext.SystemContextIa32->Dr2 = Address;\r | |
770 | Dr7.Bits.G2 = 0;\r | |
771 | Dr7.Bits.RW2 = 0;\r | |
772 | Dr7.Bits.LEN2 = 0;\r | |
773 | } else if (Register == 3) {\r | |
774 | SystemContext.SystemContextIa32->Dr3 = Address;\r | |
775 | Dr7.Bits.G3 = 0;\r | |
776 | Dr7.Bits.RW3 = 0;\r | |
777 | Dr7.Bits.LEN3 = 0;\r | |
778 | } else {\r | |
779 | return EFI_INVALID_PARAMETER;\r | |
780 | }\r | |
781 | \r | |
782 | //Update DR7 register so appropriate Gn, RWn and LENn bits can be turned off.\r | |
783 | SystemContext.SystemContextIa32->Dr7 = Dr7.UintN;\r | |
784 | \r | |
785 | return EFI_SUCCESS;\r | |
786 | }\r | |
787 | \r | |
788 | \r | |
789 | /**\r | |
790 | ‘Z1, [addr], [length]’\r | |
791 | ‘Z2, [addr], [length]’\r | |
792 | ‘Z3, [addr], [length]’\r | |
793 | ‘Z4, [addr], [length]’\r | |
794 | \r | |
795 | Insert hardware breakpoint/watchpoint at address addr of size length\r | |
796 | \r | |
797 | @param SystemContext Register content at time of the exception\r | |
798 | @param *PacketData Pointer to the Payload data for the packet\r | |
799 | \r | |
800 | **/\r | |
801 | VOID\r | |
802 | EFIAPI\r | |
803 | InsertBreakPoint (\r | |
804 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
805 | IN CHAR8 *PacketData\r | |
806 | )\r | |
807 | {\r | |
808 | UINTN Type;\r | |
809 | UINTN Address;\r | |
810 | UINTN Length;\r | |
811 | UINTN Register;\r | |
812 | EFI_STATUS Status;\r | |
813 | BREAK_TYPE BreakType = NotSupported;\r | |
814 | UINTN ErrorCode;\r | |
815 | \r | |
816 | ErrorCode = ParseBreakpointPacket (PacketData, &Type, &Address, &Length);\r | |
817 | if (ErrorCode > 0) {\r | |
818 | SendError ((UINT8)ErrorCode);\r | |
819 | return;\r | |
820 | }\r | |
821 | \r | |
822 | switch (Type) {\r | |
823 | \r | |
824 | case 0: //Software breakpoint\r | |
825 | BreakType = SoftwareBreakpoint;\r | |
826 | break;\r | |
827 | \r | |
828 | case 1: //Hardware breakpoint\r | |
829 | BreakType = InstructionExecution;\r | |
830 | break;\r | |
831 | \r | |
832 | case 2: //Write watchpoint\r | |
833 | BreakType = DataWrite;\r | |
834 | break;\r | |
835 | \r | |
836 | case 3: //Read watchpoint\r | |
837 | BreakType = DataRead;\r | |
838 | break;\r | |
839 | \r | |
840 | case 4: //Access watchpoint\r | |
841 | BreakType = DataReadWrite;\r | |
842 | break;\r | |
843 | \r | |
844 | default :\r | |
845 | Print ((CHAR16 *)L"Insert breakpoint default: %x\n", Type);\r | |
846 | SendError (GDB_EINVALIDBRKPOINTTYPE);\r | |
847 | return;\r | |
848 | }\r | |
849 | \r | |
850 | // Find next free debug register\r | |
851 | Status = FindNextFreeDebugRegister (SystemContext, &Register);\r | |
852 | if (EFI_ERROR(Status)) {\r | |
853 | Print ((CHAR16 *)L"No space left on device\n");\r | |
854 | SendError (GDB_ENOSPACE);\r | |
855 | return;\r | |
856 | }\r | |
857 | \r | |
858 | // Write Address, length data at particular DR register\r | |
859 | Status = EnableDebugRegister (SystemContext, Register, Address, Length, (UINTN)BreakType);\r | |
860 | if (EFI_ERROR(Status)) {\r | |
861 | \r | |
862 | if (Status == EFI_UNSUPPORTED) {\r | |
863 | Print ((CHAR16 *)L"Not supported\n");\r | |
6f711615 | 864 | SendNotSupported ();\r |
1e57a462 | 865 | return;\r |
866 | }\r | |
867 | \r | |
868 | Print ((CHAR16 *)L"Invalid argument\n");\r | |
869 | SendError (GDB_EINVALIDARG);\r | |
870 | return;\r | |
871 | }\r | |
872 | \r | |
873 | SendSuccess ();\r | |
874 | }\r | |
875 | \r | |
876 | \r | |
877 | /**\r | |
878 | ‘z1, [addr], [length]’\r | |
879 | ‘z2, [addr], [length]’\r | |
880 | ‘z3, [addr], [length]’\r | |
881 | ‘z4, [addr], [length]’\r | |
882 | \r | |
883 | Remove hardware breakpoint/watchpoint at address addr of size length\r | |
884 | \r | |
885 | @param *PacketData Pointer to the Payload data for the packet\r | |
886 | \r | |
887 | **/\r | |
888 | VOID\r | |
889 | EFIAPI\r | |
890 | RemoveBreakPoint (\r | |
891 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
892 | IN CHAR8 *PacketData\r | |
893 | )\r | |
894 | {\r | |
895 | UINTN Type;\r | |
896 | UINTN Address;\r | |
897 | UINTN Length;\r | |
898 | UINTN Register;\r | |
899 | BREAK_TYPE BreakType = NotSupported;\r | |
900 | EFI_STATUS Status;\r | |
901 | UINTN ErrorCode;\r | |
902 | \r | |
903 | //Parse breakpoint packet data\r | |
904 | ErrorCode = ParseBreakpointPacket (PacketData, &Type, &Address, &Length);\r | |
905 | if (ErrorCode > 0) {\r | |
906 | SendError ((UINT8)ErrorCode);\r | |
907 | return;\r | |
908 | }\r | |
909 | \r | |
910 | switch (Type) {\r | |
3402aac7 | 911 | \r |
1e57a462 | 912 | case 0: //Software breakpoint\r |
913 | BreakType = SoftwareBreakpoint;\r | |
914 | break;\r | |
3402aac7 | 915 | \r |
1e57a462 | 916 | case 1: //Hardware breakpoint\r |
917 | BreakType = InstructionExecution;\r | |
918 | break;\r | |
3402aac7 | 919 | \r |
1e57a462 | 920 | case 2: //Write watchpoint\r |
921 | BreakType = DataWrite;\r | |
922 | break;\r | |
923 | \r | |
924 | case 3: //Read watchpoint\r | |
925 | BreakType = DataRead;\r | |
926 | break;\r | |
927 | \r | |
928 | case 4: //Access watchpoint\r | |
929 | BreakType = DataReadWrite;\r | |
930 | break;\r | |
931 | \r | |
932 | default :\r | |
933 | SendError (GDB_EINVALIDBRKPOINTTYPE);\r | |
934 | return;\r | |
935 | }\r | |
936 | \r | |
937 | //Find matching debug register\r | |
938 | Status = FindMatchingDebugRegister (SystemContext, Address, Length, (UINTN)BreakType, &Register);\r | |
939 | if (EFI_ERROR(Status)) {\r | |
940 | \r | |
941 | if (Status == EFI_UNSUPPORTED) {\r | |
942 | Print ((CHAR16 *)L"Not supported.\n");\r | |
6f711615 | 943 | SendNotSupported ();\r |
1e57a462 | 944 | return;\r |
945 | }\r | |
946 | \r | |
947 | Print ((CHAR16 *)L"No matching register found.\n");\r | |
948 | SendError (GDB_ENOSPACE);\r | |
949 | return;\r | |
950 | }\r | |
951 | \r | |
952 | //Remove breakpoint\r | |
6f711615 | 953 | Status = DisableDebugRegister (SystemContext, Register);\r |
1e57a462 | 954 | if (EFI_ERROR(Status)) {\r |
955 | Print ((CHAR16 *)L"Invalid argument.\n");\r | |
956 | SendError (GDB_EINVALIDARG);\r | |
957 | return;\r | |
958 | }\r | |
959 | \r | |
960 | SendSuccess ();\r | |
961 | }\r | |
962 | \r | |
963 | \r | |
964 | VOID\r | |
965 | InitializeProcessor (\r | |
966 | VOID\r | |
967 | )\r | |
968 | {\r | |
969 | }\r | |
970 | \r | |
971 | BOOLEAN\r | |
972 | ValidateAddress (\r | |
973 | IN VOID *Address\r | |
974 | )\r | |
975 | {\r | |
976 | return TRUE;\r | |
977 | }\r | |
978 | \r | |
979 | BOOLEAN\r | |
980 | ValidateException (\r | |
3402aac7 RC |
981 | IN EFI_EXCEPTION_TYPE ExceptionType,\r |
982 | IN OUT EFI_SYSTEM_CONTEXT SystemContext\r | |
1e57a462 | 983 | )\r |
984 | {\r | |
985 | return TRUE;\r | |
986 | }\r | |
987 | \r |