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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 | |
e7108d0e MK |
16 | EFI_EXCEPTION_TYPE_ENTRY gExceptionType[] = {\r |
17 | { EXCEPT_IA32_DIVIDE_ERROR, GDB_SIGFPE },\r | |
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 | |
1e57a462 | 31 | };\r |
32 | \r | |
1e57a462 | 33 | // The offsets of registers SystemContext.\r |
34 | // The fields in the array are in the gdb ordering.\r | |
35 | //\r | |
e7108d0e MK |
36 | // 16 regs\r |
37 | UINTN gRegisterOffsets[] = {\r | |
38 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Eax),\r | |
39 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Ecx),\r | |
40 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Edx),\r | |
41 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Ebx),\r | |
42 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Esp),\r | |
43 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Ebp),\r | |
44 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Esi),\r | |
45 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Edi),\r | |
46 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Eip),\r | |
47 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Eflags),\r | |
48 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Cs),\r | |
49 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Ss),\r | |
50 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Ds),\r | |
51 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Es),\r | |
52 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Fs),\r | |
53 | OFFSET_OF (EFI_SYSTEM_CONTEXT_IA32, Gs)\r | |
1e57a462 | 54 | };\r |
55 | \r | |
e7108d0e | 56 | // Debug only..\r |
3402aac7 | 57 | VOID\r |
1e57a462 | 58 | PrintReg (\r |
e7108d0e | 59 | IN EFI_SYSTEM_CONTEXT SystemContext\r |
1e57a462 | 60 | )\r |
61 | {\r | |
62 | Print ((CHAR16 *)L"EAX: %x ", SystemContext.SystemContextIa32->Eax);\r | |
63 | Print ((CHAR16 *)L"ECX: %x ", SystemContext.SystemContextIa32->Ecx);\r | |
64 | Print ((CHAR16 *)L"EDX: %x ", SystemContext.SystemContextIa32->Edx);\r | |
65 | Print ((CHAR16 *)L"EBX: %x ", SystemContext.SystemContextIa32->Ebx);\r | |
66 | Print ((CHAR16 *)L"ESP: %x ", SystemContext.SystemContextIa32->Esp);\r | |
67 | Print ((CHAR16 *)L"EBP: %x ", SystemContext.SystemContextIa32->Ebp);\r | |
68 | Print ((CHAR16 *)L"ESI: %x ", SystemContext.SystemContextIa32->Esi);\r | |
69 | Print ((CHAR16 *)L"EDI: %x ", SystemContext.SystemContextIa32->Edi);\r | |
70 | Print ((CHAR16 *)L"EIP: %x\n", SystemContext.SystemContextIa32->Eip);\r | |
71 | Print ((CHAR16 *)L"EFlags: %x\n", SystemContext.SystemContextIa32->Eflags);\r | |
72 | }\r | |
73 | \r | |
e7108d0e | 74 | // Debug only..\r |
3402aac7 | 75 | VOID\r |
1e57a462 | 76 | PrintDRreg (\r |
e7108d0e | 77 | IN EFI_SYSTEM_CONTEXT SystemContext\r |
1e57a462 | 78 | )\r |
79 | {\r | |
80 | Print ((CHAR16 *)L"DR0: %x ", SystemContext.SystemContextIa32->Dr0);\r | |
81 | Print ((CHAR16 *)L"DR1: %x ", SystemContext.SystemContextIa32->Dr1);\r | |
82 | Print ((CHAR16 *)L"DR2: %x ", SystemContext.SystemContextIa32->Dr2);\r | |
83 | Print ((CHAR16 *)L"DR3: %x ", SystemContext.SystemContextIa32->Dr3);\r | |
84 | Print ((CHAR16 *)L"DR6: %x ", SystemContext.SystemContextIa32->Dr6);\r | |
85 | Print ((CHAR16 *)L"DR7: %x\n", SystemContext.SystemContextIa32->Dr7);\r | |
86 | }\r | |
87 | \r | |
1e57a462 | 88 | /**\r |
89 | Return the number of entries in the gExceptionType[]\r | |
3402aac7 RC |
90 | \r |
91 | @retval UINTN, the number of entries in the gExceptionType[] array.\r | |
1e57a462 | 92 | **/\r |
93 | UINTN\r | |
94 | MaxEfiException (\r | |
95 | VOID\r | |
96 | )\r | |
97 | {\r | |
98 | return sizeof (gExceptionType)/sizeof (EFI_EXCEPTION_TYPE_ENTRY);\r | |
99 | }\r | |
100 | \r | |
1e57a462 | 101 | /**\r |
102 | Return the number of entries in the gRegisters[]\r | |
3402aac7 RC |
103 | \r |
104 | @retval UINTN, the number of entries (registers) in the gRegisters[] array.\r | |
1e57a462 | 105 | **/\r |
106 | UINTN\r | |
107 | MaxRegisterCount (\r | |
108 | VOID\r | |
109 | )\r | |
110 | {\r | |
111 | return sizeof (gRegisterOffsets)/sizeof (UINTN);\r | |
112 | }\r | |
113 | \r | |
1e57a462 | 114 | /**\r |
3402aac7 | 115 | Check to see if the ISA is supported.\r |
1e57a462 | 116 | ISA = Instruction Set Architecture\r |
3402aac7 | 117 | \r |
1e57a462 | 118 | @retval TRUE if Isa is supported,\r |
119 | FALSE otherwise.\r | |
120 | **/\r | |
121 | BOOLEAN\r | |
122 | CheckIsa (\r | |
123 | IN EFI_INSTRUCTION_SET_ARCHITECTURE Isa\r | |
124 | )\r | |
125 | {\r | |
126 | return (BOOLEAN)(Isa == IsaIa32);\r | |
127 | }\r | |
128 | \r | |
1e57a462 | 129 | /**\r |
130 | This takes in the register number and the System Context, and returns a pointer to the RegNumber-th register in gdb ordering\r | |
131 | It is, by default, set to find the register pointer of the IA32 member\r | |
132 | \r | |
3402aac7 | 133 | @param SystemContext Register content at time of the exception\r |
1e57a462 | 134 | @param RegNumber The register to which we want to find a pointer\r |
135 | @retval the pointer to the RegNumber-th pointer\r | |
136 | **/\r | |
137 | UINTN *\r | |
6f711615 | 138 | FindPointerToRegister (\r |
1e57a462 | 139 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
3402aac7 | 140 | IN UINTN RegNumber\r |
1e57a462 | 141 | )\r |
142 | {\r | |
e7108d0e MK |
143 | UINT8 *TempPtr;\r |
144 | \r | |
1e57a462 | 145 | TempPtr = ((UINT8 *)SystemContext.SystemContextIa32) + gRegisterOffsets[RegNumber];\r |
146 | return (UINTN *)TempPtr;\r | |
147 | }\r | |
148 | \r | |
1e57a462 | 149 | /**\r |
150 | Adds the RegNumber-th register's value to the output buffer, starting at the given OutBufPtr\r | |
151 | \r | |
152 | @param SystemContext Register content at time of the exception\r | |
153 | @param RegNumber the number of the register that we want to read\r | |
154 | @param OutBufPtr pointer to the output buffer's end. the new data will be added from this point on.\r | |
155 | @retval the pointer to the next character of the output buffer that is available to be written on.\r | |
156 | **/\r | |
157 | CHAR8 *\r | |
158 | BasicReadRegister (\r | |
e7108d0e MK |
159 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
160 | IN UINTN RegNumber,\r | |
161 | IN CHAR8 *OutBufPtr\r | |
1e57a462 | 162 | )\r |
163 | {\r | |
e7108d0e | 164 | UINTN RegSize;\r |
3402aac7 | 165 | \r |
1e57a462 | 166 | RegSize = 0;\r |
167 | while (RegSize < REG_SIZE) {\r | |
6f711615 | 168 | *OutBufPtr++ = mHexToStr[((*FindPointerToRegister (SystemContext, RegNumber) >> (RegSize+4)) & 0xf)];\r |
169 | *OutBufPtr++ = mHexToStr[((*FindPointerToRegister (SystemContext, RegNumber) >> RegSize) & 0xf)];\r | |
e7108d0e | 170 | RegSize = RegSize + 8;\r |
1e57a462 | 171 | }\r |
e7108d0e | 172 | \r |
1e57a462 | 173 | return OutBufPtr;\r |
174 | }\r | |
175 | \r | |
3402aac7 RC |
176 | /** ‘p n’\r |
177 | Reads the n-th register's value into an output buffer and sends it as a packet\r | |
1e57a462 | 178 | \r |
179 | @param SystemContext Register content at time of the exception\r | |
180 | @param InBuffer Pointer to the input buffer received from gdb server\r | |
181 | **/\r | |
182 | VOID\r | |
183 | EFIAPI\r | |
184 | ReadNthRegister (\r | |
e7108d0e MK |
185 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
186 | IN CHAR8 *InBuffer\r | |
1e57a462 | 187 | )\r |
188 | {\r | |
e7108d0e MK |
189 | UINTN RegNumber;\r |
190 | CHAR8 OutBuffer[9]; // 1 reg=8 hex chars, and the end '\0' (escape seq)\r | |
191 | CHAR8 *OutBufPtr; // pointer to the output buffer\r | |
3402aac7 | 192 | \r |
1e57a462 | 193 | RegNumber = AsciiStrHexToUintn (&InBuffer[1]);\r |
194 | \r | |
e7108d0e | 195 | if ((RegNumber < 0) || (RegNumber >= MaxRegisterCount ())) {\r |
1e57a462 | 196 | SendError (GDB_EINVALIDREGNUM);\r |
197 | return;\r | |
198 | }\r | |
199 | \r | |
200 | OutBufPtr = OutBuffer;\r | |
6f711615 | 201 | OutBufPtr = BasicReadRegister (SystemContext, RegNumber, OutBufPtr);\r |
1e57a462 | 202 | \r |
203 | *OutBufPtr = '\0'; // the end of the buffer\r | |
e7108d0e | 204 | SendPacket (OutBuffer);\r |
1e57a462 | 205 | }\r |
206 | \r | |
3402aac7 RC |
207 | /** ‘g’\r |
208 | Reads the general registers into an output buffer and sends it as a packet\r | |
1e57a462 | 209 | \r |
210 | @param SystemContext Register content at time of the exception\r | |
211 | **/\r | |
212 | VOID\r | |
213 | EFIAPI\r | |
3402aac7 | 214 | ReadGeneralRegisters (\r |
e7108d0e | 215 | IN EFI_SYSTEM_CONTEXT SystemContext\r |
1e57a462 | 216 | )\r |
217 | {\r | |
e7108d0e MK |
218 | UINTN i;\r |
219 | CHAR8 OutBuffer[129]; // 16 regs, 8 hex chars each, and the end '\0' (escape seq)\r | |
220 | CHAR8 *OutBufPtr; // pointer to the output buffer\r | |
1e57a462 | 221 | \r |
222 | OutBufPtr = OutBuffer;\r | |
e7108d0e MK |
223 | for (i = 0; i < MaxRegisterCount (); i++) {\r |
224 | // there are only 16 registers to read\r | |
6f711615 | 225 | OutBufPtr = BasicReadRegister (SystemContext, i, OutBufPtr);\r |
1e57a462 | 226 | }\r |
227 | \r | |
228 | *OutBufPtr = '\0'; // the end of the buffer\r | |
e7108d0e | 229 | SendPacket (OutBuffer);\r |
1e57a462 | 230 | }\r |
231 | \r | |
1e57a462 | 232 | /**\r |
233 | Adds the RegNumber-th register's value to the output buffer, starting at the given OutBufPtr\r | |
234 | \r | |
235 | @param SystemContext Register content at time of the exception\r | |
236 | @param RegNumber the number of the register that we want to write\r | |
237 | @param InBufPtr pointer to the output buffer. the new data will be extracted from the input buffer from this point on.\r | |
238 | @retval the pointer to the next character of the input buffer that can be used\r | |
239 | **/\r | |
240 | CHAR8 *\r | |
241 | BasicWriteRegister (\r | |
e7108d0e MK |
242 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
243 | IN UINTN RegNumber,\r | |
244 | IN CHAR8 *InBufPtr\r | |
1e57a462 | 245 | )\r |
246 | {\r | |
e7108d0e MK |
247 | UINTN RegSize;\r |
248 | UINTN TempValue; // the value transferred from a hex char\r | |
249 | UINT32 NewValue; // the new value of the RegNumber-th Register\r | |
3402aac7 | 250 | \r |
1e57a462 | 251 | NewValue = 0;\r |
e7108d0e | 252 | RegSize = 0;\r |
1e57a462 | 253 | while (RegSize < REG_SIZE) {\r |
e7108d0e | 254 | TempValue = HexCharToInt (*InBufPtr++);\r |
3402aac7 | 255 | \r |
e7108d0e | 256 | if (TempValue < 0) {\r |
3402aac7 | 257 | SendError (GDB_EBADMEMDATA);\r |
1e57a462 | 258 | return NULL;\r |
259 | }\r | |
260 | \r | |
261 | NewValue += (TempValue << (RegSize+4));\r | |
e7108d0e | 262 | TempValue = HexCharToInt (*InBufPtr++);\r |
3402aac7 | 263 | \r |
1e57a462 | 264 | if (TempValue < 0) {\r |
3402aac7 | 265 | SendError (GDB_EBADMEMDATA);\r |
1e57a462 | 266 | return NULL;\r |
267 | }\r | |
3402aac7 RC |
268 | \r |
269 | NewValue += (TempValue << RegSize);\r | |
e7108d0e | 270 | RegSize = RegSize + 8;\r |
1e57a462 | 271 | }\r |
e7108d0e | 272 | \r |
6f711615 | 273 | *(FindPointerToRegister (SystemContext, RegNumber)) = NewValue;\r |
1e57a462 | 274 | return InBufPtr;\r |
275 | }\r | |
276 | \r | |
1e57a462 | 277 | /** ‘P n...=r...’\r |
278 | Writes the new value of n-th register received into the input buffer to the n-th register\r | |
279 | \r | |
280 | @param SystemContext Register content at time of the exception\r | |
c6a72cd7 | 281 | @param InBuffer Pointer to the input buffer received from gdb server\r |
1e57a462 | 282 | **/\r |
283 | VOID\r | |
284 | EFIAPI\r | |
285 | WriteNthRegister (\r | |
e7108d0e MK |
286 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
287 | IN CHAR8 *InBuffer\r | |
1e57a462 | 288 | )\r |
289 | {\r | |
e7108d0e MK |
290 | UINTN RegNumber;\r |
291 | CHAR8 RegNumBuffer[MAX_REG_NUM_BUF_SIZE]; // put the 'n..' part of the message into this array\r | |
292 | CHAR8 *RegNumBufPtr;\r | |
293 | CHAR8 *InBufPtr; // pointer to the input buffer\r | |
3402aac7 | 294 | \r |
1e57a462 | 295 | // find the register number to write\r |
e7108d0e | 296 | InBufPtr = &InBuffer[1];\r |
1e57a462 | 297 | RegNumBufPtr = RegNumBuffer;\r |
298 | while (*InBufPtr != '=') {\r | |
299 | *RegNumBufPtr++ = *InBufPtr++;\r | |
3402aac7 | 300 | }\r |
e7108d0e | 301 | \r |
1e57a462 | 302 | *RegNumBufPtr = '\0';\r |
e7108d0e | 303 | RegNumber = AsciiStrHexToUintn (RegNumBuffer);\r |
1e57a462 | 304 | \r |
305 | // check if this is a valid Register Number\r | |
e7108d0e | 306 | if ((RegNumber < 0) || (RegNumber >= MaxRegisterCount ())) {\r |
91c38d4e | 307 | SendError (GDB_EINVALIDREGNUM);\r |
1e57a462 | 308 | return;\r |
309 | }\r | |
e7108d0e | 310 | \r |
1e57a462 | 311 | InBufPtr++; // skips the '=' character\r |
312 | BasicWriteRegister (SystemContext, RegNumber, InBufPtr);\r | |
e7108d0e | 313 | SendSuccess ();\r |
1e57a462 | 314 | }\r |
315 | \r | |
1e57a462 | 316 | /** ‘G XX...’\r |
317 | Writes the new values received into the input buffer to the general registers\r | |
318 | \r | |
319 | @param SystemContext Register content at time of the exception\r | |
320 | @param InBuffer Pointer to the input buffer received from gdb server\r | |
321 | **/\r | |
322 | VOID\r | |
323 | EFIAPI\r | |
324 | WriteGeneralRegisters (\r | |
e7108d0e MK |
325 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
326 | IN CHAR8 *InBuffer\r | |
1e57a462 | 327 | )\r |
328 | {\r | |
329 | UINTN i;\r | |
e7108d0e | 330 | CHAR8 *InBufPtr; /// pointer to the input buffer\r |
1e57a462 | 331 | \r |
3402aac7 RC |
332 | // check to see if the buffer is the right size which is\r |
333 | // 1 (for 'G') + 16 (for 16 registers) * 8 ( for 8 hex chars each) = 129\r | |
e7108d0e MK |
334 | if (AsciiStrLen (InBuffer) != 129) {\r |
335 | // 16 regs, 8 hex chars each, and the end '\0' (escape seq)\r | |
336 | // Bad message. Message is not the right length\r | |
3402aac7 | 337 | SendError (GDB_EBADBUFSIZE);\r |
1e57a462 | 338 | return;\r |
339 | }\r | |
340 | \r | |
341 | InBufPtr = &InBuffer[1];\r | |
3402aac7 | 342 | \r |
1e57a462 | 343 | // Read the new values for the registers from the input buffer to an array, NewValueArray.\r |
344 | // The values in the array are in the gdb ordering\r | |
e7108d0e MK |
345 | for (i = 0; i < MaxRegisterCount (); i++) {\r |
346 | // there are only 16 registers to write\r | |
6f711615 | 347 | InBufPtr = BasicWriteRegister (SystemContext, i, InBufPtr);\r |
1e57a462 | 348 | }\r |
349 | \r | |
e7108d0e | 350 | SendSuccess ();\r |
1e57a462 | 351 | }\r |
352 | \r | |
3402aac7 | 353 | /**\r |
1e57a462 | 354 | Insert Single Step in the SystemContext\r |
3402aac7 | 355 | \r |
1e57a462 | 356 | @param SystemContext Register content at time of the exception\r |
357 | **/\r | |
358 | VOID\r | |
359 | AddSingleStep (\r | |
360 | IN EFI_SYSTEM_CONTEXT SystemContext\r | |
361 | )\r | |
362 | {\r | |
e7108d0e | 363 | SystemContext.SystemContextIa32->Eflags |= TF_BIT; // Setting the TF bit.\r |
1e57a462 | 364 | }\r |
365 | \r | |
3402aac7 | 366 | /**\r |
1e57a462 | 367 | Remove Single Step in the SystemContext\r |
3402aac7 | 368 | \r |
1e57a462 | 369 | @param SystemContext Register content at time of the exception\r |
370 | **/\r | |
371 | VOID\r | |
372 | RemoveSingleStep (\r | |
373 | IN EFI_SYSTEM_CONTEXT SystemContext\r | |
374 | )\r | |
375 | {\r | |
376 | SystemContext.SystemContextIa32->Eflags &= ~TF_BIT; // clearing the TF bit.\r | |
377 | }\r | |
378 | \r | |
3402aac7 RC |
379 | /** ‘c [addr ]’\r |
380 | Continue. addr is Address to resume. If addr is omitted, resume at current\r | |
1e57a462 | 381 | Address.\r |
3402aac7 RC |
382 | \r |
383 | @param SystemContext Register content at time of the exception\r | |
1e57a462 | 384 | **/\r |
385 | VOID\r | |
386 | EFIAPI\r | |
387 | ContinueAtAddress (\r | |
e7108d0e MK |
388 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
389 | IN CHAR8 *PacketData\r | |
1e57a462 | 390 | )\r |
391 | {\r | |
392 | if (PacketData[1] != '\0') {\r | |
393 | SystemContext.SystemContextIa32->Eip = AsciiStrHexToUintn (&PacketData[1]);\r | |
3402aac7 | 394 | }\r |
1e57a462 | 395 | }\r |
396 | \r | |
1e57a462 | 397 | /** ‘s [addr ]’\r |
3402aac7 | 398 | Single step. addr is the Address at which to resume. If addr is omitted, resume\r |
1e57a462 | 399 | at same Address.\r |
3402aac7 RC |
400 | \r |
401 | @param SystemContext Register content at time of the exception\r | |
1e57a462 | 402 | **/\r |
403 | VOID\r | |
404 | EFIAPI\r | |
405 | SingleStep (\r | |
e7108d0e MK |
406 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
407 | IN CHAR8 *PacketData\r | |
1e57a462 | 408 | )\r |
409 | {\r | |
410 | if (PacketData[1] != '\0') {\r | |
411 | SystemContext.SystemContextIa32->Eip = AsciiStrHexToUintn (&PacketData[1]);\r | |
412 | }\r | |
3402aac7 | 413 | \r |
1e57a462 | 414 | AddSingleStep (SystemContext);\r |
415 | }\r | |
416 | \r | |
1e57a462 | 417 | /**\r |
418 | Returns breakpoint data address from DR0-DR3 based on the input breakpoint number\r | |
419 | \r | |
420 | @param SystemContext Register content at time of the exception\r | |
421 | @param BreakpointNumber Breakpoint number\r | |
422 | \r | |
423 | @retval Address Data address from DR0-DR3 based on the breakpoint number.\r | |
424 | \r | |
425 | **/\r | |
426 | UINTN\r | |
427 | GetBreakpointDataAddress (\r | |
428 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
429 | IN UINTN BreakpointNumber\r | |
430 | )\r | |
431 | {\r | |
e7108d0e | 432 | UINTN Address;\r |
1e57a462 | 433 | \r |
434 | if (BreakpointNumber == 1) {\r | |
435 | Address = SystemContext.SystemContextIa32->Dr0;\r | |
436 | } else if (BreakpointNumber == 2) {\r | |
437 | Address = SystemContext.SystemContextIa32->Dr1;\r | |
438 | } else if (BreakpointNumber == 3) {\r | |
439 | Address = SystemContext.SystemContextIa32->Dr2;\r | |
440 | } else if (BreakpointNumber == 4) {\r | |
441 | Address = SystemContext.SystemContextIa32->Dr3;\r | |
442 | } else {\r | |
443 | Address = 0;\r | |
444 | }\r | |
445 | \r | |
446 | return Address;\r | |
447 | }\r | |
448 | \r | |
1e57a462 | 449 | /**\r |
450 | Returns currently detected breakpoint value based on the register DR6 B0-B3 field.\r | |
451 | If no breakpoint is detected then it returns 0.\r | |
452 | \r | |
453 | @param SystemContext Register content at time of the exception\r | |
454 | \r | |
3402aac7 | 455 | @retval {1-4} Currently detected breakpoint value\r |
1e57a462 | 456 | @retval 0 No breakpoint detected.\r |
3402aac7 | 457 | \r |
1e57a462 | 458 | **/\r |
459 | UINTN\r | |
460 | GetBreakpointDetected (\r | |
461 | IN EFI_SYSTEM_CONTEXT SystemContext\r | |
462 | )\r | |
463 | {\r | |
e7108d0e MK |
464 | IA32_DR6 Dr6;\r |
465 | UINTN BreakpointNumber;\r | |
1e57a462 | 466 | \r |
467 | Dr6.UintN = SystemContext.SystemContextIa32->Dr6;\r | |
468 | \r | |
469 | if (Dr6.Bits.B0 == 1) {\r | |
470 | BreakpointNumber = 1;\r | |
471 | } else if (Dr6.Bits.B1 == 1) {\r | |
472 | BreakpointNumber = 2;\r | |
473 | } else if (Dr6.Bits.B2 == 1) {\r | |
474 | BreakpointNumber = 3;\r | |
475 | } else if (Dr6.Bits.B3 == 1) {\r | |
476 | BreakpointNumber = 4;\r | |
477 | } else {\r | |
e7108d0e | 478 | BreakpointNumber = 0; // No breakpoint detected\r |
1e57a462 | 479 | }\r |
480 | \r | |
481 | return BreakpointNumber;\r | |
482 | }\r | |
483 | \r | |
1e57a462 | 484 | /**\r |
485 | Returns Breakpoint type (InstructionExecution, DataWrite, DataRead or DataReadWrite)\r | |
486 | based on the Breakpoint number\r | |
3402aac7 | 487 | \r |
1e57a462 | 488 | @param SystemContext Register content at time of the exception\r |
489 | @param BreakpointNumber Breakpoint number\r | |
3402aac7 | 490 | \r |
1e57a462 | 491 | @retval BREAK_TYPE Breakpoint type value read from register DR7 RWn field\r |
492 | For unknown value, it returns NotSupported.\r | |
3402aac7 | 493 | \r |
1e57a462 | 494 | **/\r |
495 | BREAK_TYPE\r | |
496 | GetBreakpointType (\r | |
497 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
498 | IN UINTN BreakpointNumber\r | |
499 | )\r | |
500 | {\r | |
e7108d0e MK |
501 | IA32_DR7 Dr7;\r |
502 | BREAK_TYPE Type = NotSupported; // Default is NotSupported type\r | |
1e57a462 | 503 | \r |
504 | Dr7.UintN = SystemContext.SystemContextIa32->Dr7;\r | |
505 | \r | |
506 | if (BreakpointNumber == 1) {\r | |
e7108d0e | 507 | Type = (BREAK_TYPE)Dr7.Bits.RW0;\r |
1e57a462 | 508 | } else if (BreakpointNumber == 2) {\r |
e7108d0e | 509 | Type = (BREAK_TYPE)Dr7.Bits.RW1;\r |
1e57a462 | 510 | } else if (BreakpointNumber == 3) {\r |
e7108d0e | 511 | Type = (BREAK_TYPE)Dr7.Bits.RW2;\r |
1e57a462 | 512 | } else if (BreakpointNumber == 4) {\r |
e7108d0e | 513 | Type = (BREAK_TYPE)Dr7.Bits.RW3;\r |
1e57a462 | 514 | }\r |
515 | \r | |
516 | return Type;\r | |
517 | }\r | |
518 | \r | |
3402aac7 | 519 | /**\r |
1e57a462 | 520 | Parses Length and returns the length which DR7 LENn field accepts.\r |
3402aac7 | 521 | For example: If we receive 1-Byte length then we should return 0.\r |
1e57a462 | 522 | Zero gets written to DR7 LENn field.\r |
523 | \r | |
524 | @param Length Breakpoint length in Bytes (1 byte, 2 byte, 4 byte)\r | |
525 | \r | |
526 | @retval Length Appropriate converted values which DR7 LENn field accepts.\r | |
527 | \r | |
528 | **/\r | |
529 | UINTN\r | |
530 | ConvertLengthData (\r | |
e7108d0e | 531 | IN UINTN Length\r |
1e57a462 | 532 | )\r |
533 | {\r | |
e7108d0e MK |
534 | if (Length == 1) {\r |
535 | // 1-Byte length\r | |
1e57a462 | 536 | return 0;\r |
e7108d0e MK |
537 | } else if (Length == 2) {\r |
538 | // 2-Byte length\r | |
1e57a462 | 539 | return 1;\r |
e7108d0e MK |
540 | } else if (Length == 4) {\r |
541 | // 4-Byte length\r | |
1e57a462 | 542 | return 3;\r |
e7108d0e MK |
543 | } else {\r |
544 | // Undefined or 8-byte length\r | |
1e57a462 | 545 | return 2;\r |
546 | }\r | |
547 | }\r | |
548 | \r | |
1e57a462 | 549 | /**\r |
3402aac7 RC |
550 | Finds the next free debug register. If all the registers are occupied then\r |
551 | EFI_OUT_OF_RESOURCES is returned.\r | |
1e57a462 | 552 | \r |
553 | @param SystemContext Register content at time of the exception\r | |
554 | @param Register Register value (0 - 3 for the first free debug register)\r | |
555 | \r | |
556 | @retval EFI_STATUS Appropriate status value.\r | |
557 | \r | |
558 | **/\r | |
559 | EFI_STATUS\r | |
560 | FindNextFreeDebugRegister (\r | |
561 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
562 | OUT UINTN *Register\r | |
563 | )\r | |
564 | {\r | |
e7108d0e | 565 | IA32_DR7 Dr7;\r |
1e57a462 | 566 | \r |
567 | Dr7.UintN = SystemContext.SystemContextIa32->Dr7;\r | |
568 | \r | |
569 | if (Dr7.Bits.G0 == 0) {\r | |
570 | *Register = 0;\r | |
571 | } else if (Dr7.Bits.G1 == 0) {\r | |
572 | *Register = 1;\r | |
573 | } else if (Dr7.Bits.G2 == 0) {\r | |
574 | *Register = 2;\r | |
575 | } else if (Dr7.Bits.G3 == 0) {\r | |
576 | *Register = 3;\r | |
577 | } else {\r | |
578 | return EFI_OUT_OF_RESOURCES;\r | |
579 | }\r | |
580 | \r | |
581 | return EFI_SUCCESS;\r | |
582 | }\r | |
583 | \r | |
1e57a462 | 584 | /**\r |
585 | Enables the debug register. Writes Address value to appropriate DR0-3 register.\r | |
586 | Sets LENn, Gn, RWn bits in DR7 register.\r | |
3402aac7 | 587 | \r |
1e57a462 | 588 | @param SystemContext Register content at time of the exception\r |
3402aac7 | 589 | @param Register Register value (0 - 3)\r |
1e57a462 | 590 | @param Address Breakpoint address value\r |
3402aac7 | 591 | @param Type Breakpoint type (Instruction, Data write, Data read\r |
1e57a462 | 592 | or write etc.)\r |
593 | \r | |
594 | @retval EFI_STATUS Appropriate status value.\r | |
595 | \r | |
596 | **/\r | |
597 | EFI_STATUS\r | |
598 | EnableDebugRegister (\r | |
599 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
600 | IN UINTN Register,\r | |
601 | IN UINTN Address,\r | |
602 | IN UINTN Length,\r | |
603 | IN UINTN Type\r | |
604 | )\r | |
605 | {\r | |
606 | IA32_DR7 Dr7;\r | |
607 | \r | |
e7108d0e | 608 | // Convert length data\r |
1e57a462 | 609 | Length = ConvertLengthData (Length);\r |
610 | \r | |
e7108d0e MK |
611 | // For Instruction execution, length should be 0\r |
612 | // (Ref. Intel reference manual 18.2.4)\r | |
1e57a462 | 613 | if ((Type == 0) && (Length != 0)) {\r |
614 | return EFI_INVALID_PARAMETER;\r | |
615 | }\r | |
3402aac7 | 616 | \r |
e7108d0e MK |
617 | // Hardware doesn't support ReadWatch (z3 packet) type. GDB can handle\r |
618 | // software breakpoint. We should send empty packet in both these cases.\r | |
3402aac7 | 619 | if ((Type == (BREAK_TYPE)DataRead) ||\r |
e7108d0e MK |
620 | (Type == (BREAK_TYPE)SoftwareBreakpoint))\r |
621 | {\r | |
1e57a462 | 622 | return EFI_UNSUPPORTED;\r |
623 | }\r | |
624 | \r | |
e7108d0e | 625 | // Read DR7 so appropriate Gn, RWn and LENn bits can be modified.\r |
1e57a462 | 626 | Dr7.UintN = SystemContext.SystemContextIa32->Dr7;\r |
627 | \r | |
628 | if (Register == 0) {\r | |
629 | SystemContext.SystemContextIa32->Dr0 = Address;\r | |
e7108d0e MK |
630 | Dr7.Bits.G0 = 1;\r |
631 | Dr7.Bits.RW0 = Type;\r | |
632 | Dr7.Bits.LEN0 = Length;\r | |
1e57a462 | 633 | } else if (Register == 1) {\r |
634 | SystemContext.SystemContextIa32->Dr1 = Address;\r | |
e7108d0e MK |
635 | Dr7.Bits.G1 = 1;\r |
636 | Dr7.Bits.RW1 = Type;\r | |
637 | Dr7.Bits.LEN1 = Length;\r | |
1e57a462 | 638 | } else if (Register == 2) {\r |
639 | SystemContext.SystemContextIa32->Dr2 = Address;\r | |
e7108d0e MK |
640 | Dr7.Bits.G2 = 1;\r |
641 | Dr7.Bits.RW2 = Type;\r | |
642 | Dr7.Bits.LEN2 = Length;\r | |
1e57a462 | 643 | } else if (Register == 3) {\r |
644 | SystemContext.SystemContextIa32->Dr3 = Address;\r | |
e7108d0e MK |
645 | Dr7.Bits.G3 = 1;\r |
646 | Dr7.Bits.RW3 = Type;\r | |
647 | Dr7.Bits.LEN3 = Length;\r | |
1e57a462 | 648 | } else {\r |
649 | return EFI_INVALID_PARAMETER;\r | |
650 | }\r | |
651 | \r | |
e7108d0e | 652 | // Update Dr7 with appropriate Gn, RWn and LENn bits\r |
1e57a462 | 653 | SystemContext.SystemContextIa32->Dr7 = Dr7.UintN;\r |
654 | \r | |
655 | return EFI_SUCCESS;\r | |
656 | }\r | |
657 | \r | |
1e57a462 | 658 | /**\r |
c6a72cd7 | 659 | Returns register number 0 - 3 for the matching debug register.\r |
1e57a462 | 660 | This function compares incoming Address, Type, Length and\r |
661 | if there is a match then it returns the appropriate register number.\r | |
662 | In case of mismatch, function returns EFI_NOT_FOUND message.\r | |
663 | \r | |
664 | @param SystemContext Register content at time of the exception\r | |
665 | @param Address Breakpoint address value\r | |
666 | @param Length Breakpoint length value\r | |
3402aac7 | 667 | @param Type Breakpoint type (Instruction, Data write,\r |
1e57a462 | 668 | Data read or write etc.)\r |
669 | @param Register Register value to be returned\r | |
670 | \r | |
671 | @retval EFI_STATUS Appropriate status value.\r | |
672 | \r | |
673 | **/\r | |
674 | EFI_STATUS\r | |
675 | FindMatchingDebugRegister (\r | |
e7108d0e MK |
676 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
677 | IN UINTN Address,\r | |
678 | IN UINTN Length,\r | |
679 | IN UINTN Type,\r | |
680 | OUT UINTN *Register\r | |
681 | )\r | |
1e57a462 | 682 | {\r |
e7108d0e | 683 | IA32_DR7 Dr7;\r |
1e57a462 | 684 | \r |
e7108d0e MK |
685 | // Hardware doesn't support ReadWatch (z3 packet) type. GDB can handle\r |
686 | // software breakpoint. We should send empty packet in both these cases.\r | |
3402aac7 | 687 | if ((Type == (BREAK_TYPE)DataRead) ||\r |
e7108d0e MK |
688 | (Type == (BREAK_TYPE)SoftwareBreakpoint))\r |
689 | {\r | |
1e57a462 | 690 | return EFI_UNSUPPORTED;\r |
691 | }\r | |
692 | \r | |
e7108d0e MK |
693 | // Convert length data\r |
694 | Length = ConvertLengthData (Length);\r | |
1e57a462 | 695 | \r |
696 | Dr7.UintN = SystemContext.SystemContextIa32->Dr7;\r | |
697 | \r | |
3402aac7 | 698 | if ((Dr7.Bits.G0 == 1) &&\r |
1e57a462 | 699 | (Dr7.Bits.LEN0 == Length) &&\r |
3402aac7 | 700 | (Dr7.Bits.RW0 == Type) &&\r |
e7108d0e MK |
701 | (Address == SystemContext.SystemContextIa32->Dr0))\r |
702 | {\r | |
1e57a462 | 703 | *Register = 0;\r |
3402aac7 | 704 | } else if ((Dr7.Bits.G1 == 1) &&\r |
1e57a462 | 705 | (Dr7.Bits.LEN1 == Length) &&\r |
3402aac7 | 706 | (Dr7.Bits.RW1 == Type) &&\r |
e7108d0e MK |
707 | (Address == SystemContext.SystemContextIa32->Dr1))\r |
708 | {\r | |
1e57a462 | 709 | *Register = 1;\r |
3402aac7 | 710 | } else if ((Dr7.Bits.G2 == 1) &&\r |
1e57a462 | 711 | (Dr7.Bits.LEN2 == Length) &&\r |
3402aac7 | 712 | (Dr7.Bits.RW2 == Type) &&\r |
e7108d0e MK |
713 | (Address == SystemContext.SystemContextIa32->Dr2))\r |
714 | {\r | |
1e57a462 | 715 | *Register = 2;\r |
3402aac7 | 716 | } else if ((Dr7.Bits.G3 == 1) &&\r |
1e57a462 | 717 | (Dr7.Bits.LEN3 == Length) &&\r |
3402aac7 | 718 | (Dr7.Bits.RW3 == Type) &&\r |
e7108d0e MK |
719 | (Address == SystemContext.SystemContextIa32->Dr3))\r |
720 | {\r | |
1e57a462 | 721 | *Register = 3;\r |
722 | } else {\r | |
723 | Print ((CHAR16 *)L"No match found..\n");\r | |
724 | return EFI_NOT_FOUND;\r | |
725 | }\r | |
726 | \r | |
727 | return EFI_SUCCESS;\r | |
728 | }\r | |
729 | \r | |
1e57a462 | 730 | /**\r |
731 | Disables the particular debug register.\r | |
732 | \r | |
733 | @param SystemContext Register content at time of the exception\r | |
734 | @param Register Register to be disabled\r | |
735 | \r | |
736 | @retval EFI_STATUS Appropriate status value.\r | |
737 | \r | |
738 | **/\r | |
739 | EFI_STATUS\r | |
740 | DisableDebugRegister (\r | |
e7108d0e MK |
741 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
742 | IN UINTN Register\r | |
743 | )\r | |
1e57a462 | 744 | {\r |
745 | IA32_DR7 Dr7;\r | |
e7108d0e | 746 | UINTN Address = 0;\r |
3402aac7 | 747 | \r |
e7108d0e | 748 | // Read DR7 register so appropriate Gn, RWn and LENn bits can be turned off.\r |
1e57a462 | 749 | Dr7.UintN = SystemContext.SystemContextIa32->Dr7;\r |
750 | \r | |
751 | if (Register == 0) {\r | |
752 | SystemContext.SystemContextIa32->Dr0 = Address;\r | |
e7108d0e MK |
753 | Dr7.Bits.G0 = 0;\r |
754 | Dr7.Bits.RW0 = 0;\r | |
755 | Dr7.Bits.LEN0 = 0;\r | |
1e57a462 | 756 | } else if (Register == 1) {\r |
757 | SystemContext.SystemContextIa32->Dr1 = Address;\r | |
e7108d0e MK |
758 | Dr7.Bits.G1 = 0;\r |
759 | Dr7.Bits.RW1 = 0;\r | |
760 | Dr7.Bits.LEN1 = 0;\r | |
1e57a462 | 761 | } else if (Register == 2) {\r |
762 | SystemContext.SystemContextIa32->Dr2 = Address;\r | |
e7108d0e MK |
763 | Dr7.Bits.G2 = 0;\r |
764 | Dr7.Bits.RW2 = 0;\r | |
765 | Dr7.Bits.LEN2 = 0;\r | |
1e57a462 | 766 | } else if (Register == 3) {\r |
767 | SystemContext.SystemContextIa32->Dr3 = Address;\r | |
e7108d0e MK |
768 | Dr7.Bits.G3 = 0;\r |
769 | Dr7.Bits.RW3 = 0;\r | |
770 | Dr7.Bits.LEN3 = 0;\r | |
1e57a462 | 771 | } else {\r |
772 | return EFI_INVALID_PARAMETER;\r | |
773 | }\r | |
774 | \r | |
e7108d0e | 775 | // Update DR7 register so appropriate Gn, RWn and LENn bits can be turned off.\r |
1e57a462 | 776 | SystemContext.SystemContextIa32->Dr7 = Dr7.UintN;\r |
777 | \r | |
778 | return EFI_SUCCESS;\r | |
779 | }\r | |
780 | \r | |
1e57a462 | 781 | /**\r |
782 | ‘Z1, [addr], [length]’\r | |
783 | ‘Z2, [addr], [length]’\r | |
784 | ‘Z3, [addr], [length]’\r | |
785 | ‘Z4, [addr], [length]’\r | |
786 | \r | |
787 | Insert hardware breakpoint/watchpoint at address addr of size length\r | |
788 | \r | |
789 | @param SystemContext Register content at time of the exception\r | |
790 | @param *PacketData Pointer to the Payload data for the packet\r | |
791 | \r | |
792 | **/\r | |
793 | VOID\r | |
794 | EFIAPI\r | |
795 | InsertBreakPoint (\r | |
796 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
e7108d0e | 797 | IN CHAR8 *PacketData\r |
1e57a462 | 798 | )\r |
799 | {\r | |
e7108d0e MK |
800 | UINTN Type;\r |
801 | UINTN Address;\r | |
802 | UINTN Length;\r | |
803 | UINTN Register;\r | |
804 | EFI_STATUS Status;\r | |
805 | BREAK_TYPE BreakType = NotSupported;\r | |
806 | UINTN ErrorCode;\r | |
1e57a462 | 807 | \r |
808 | ErrorCode = ParseBreakpointPacket (PacketData, &Type, &Address, &Length);\r | |
809 | if (ErrorCode > 0) {\r | |
810 | SendError ((UINT8)ErrorCode);\r | |
811 | return;\r | |
812 | }\r | |
813 | \r | |
814 | switch (Type) {\r | |
e7108d0e | 815 | case 0: // Software breakpoint\r |
1e57a462 | 816 | BreakType = SoftwareBreakpoint;\r |
817 | break;\r | |
818 | \r | |
e7108d0e | 819 | case 1: // Hardware breakpoint\r |
1e57a462 | 820 | BreakType = InstructionExecution;\r |
821 | break;\r | |
822 | \r | |
e7108d0e | 823 | case 2: // Write watchpoint\r |
1e57a462 | 824 | BreakType = DataWrite;\r |
825 | break;\r | |
826 | \r | |
e7108d0e | 827 | case 3: // Read watchpoint\r |
1e57a462 | 828 | BreakType = DataRead;\r |
829 | break;\r | |
830 | \r | |
e7108d0e | 831 | case 4: // Access watchpoint\r |
1e57a462 | 832 | BreakType = DataReadWrite;\r |
833 | break;\r | |
834 | \r | |
e7108d0e | 835 | default:\r |
1e57a462 | 836 | Print ((CHAR16 *)L"Insert breakpoint default: %x\n", Type);\r |
837 | SendError (GDB_EINVALIDBRKPOINTTYPE);\r | |
838 | return;\r | |
839 | }\r | |
840 | \r | |
841 | // Find next free debug register\r | |
842 | Status = FindNextFreeDebugRegister (SystemContext, &Register);\r | |
e7108d0e | 843 | if (EFI_ERROR (Status)) {\r |
1e57a462 | 844 | Print ((CHAR16 *)L"No space left on device\n");\r |
845 | SendError (GDB_ENOSPACE);\r | |
846 | return;\r | |
847 | }\r | |
848 | \r | |
849 | // Write Address, length data at particular DR register\r | |
850 | Status = EnableDebugRegister (SystemContext, Register, Address, Length, (UINTN)BreakType);\r | |
e7108d0e | 851 | if (EFI_ERROR (Status)) {\r |
1e57a462 | 852 | if (Status == EFI_UNSUPPORTED) {\r |
853 | Print ((CHAR16 *)L"Not supported\n");\r | |
6f711615 | 854 | SendNotSupported ();\r |
1e57a462 | 855 | return;\r |
856 | }\r | |
857 | \r | |
858 | Print ((CHAR16 *)L"Invalid argument\n");\r | |
859 | SendError (GDB_EINVALIDARG);\r | |
860 | return;\r | |
861 | }\r | |
862 | \r | |
863 | SendSuccess ();\r | |
864 | }\r | |
865 | \r | |
1e57a462 | 866 | /**\r |
867 | ‘z1, [addr], [length]’\r | |
868 | ‘z2, [addr], [length]’\r | |
869 | ‘z3, [addr], [length]’\r | |
870 | ‘z4, [addr], [length]’\r | |
871 | \r | |
872 | Remove hardware breakpoint/watchpoint at address addr of size length\r | |
873 | \r | |
874 | @param *PacketData Pointer to the Payload data for the packet\r | |
875 | \r | |
876 | **/\r | |
877 | VOID\r | |
878 | EFIAPI\r | |
879 | RemoveBreakPoint (\r | |
880 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
881 | IN CHAR8 *PacketData\r | |
882 | )\r | |
883 | {\r | |
e7108d0e MK |
884 | UINTN Type;\r |
885 | UINTN Address;\r | |
886 | UINTN Length;\r | |
887 | UINTN Register;\r | |
888 | BREAK_TYPE BreakType = NotSupported;\r | |
889 | EFI_STATUS Status;\r | |
890 | UINTN ErrorCode;\r | |
891 | \r | |
892 | // Parse breakpoint packet data\r | |
1e57a462 | 893 | ErrorCode = ParseBreakpointPacket (PacketData, &Type, &Address, &Length);\r |
894 | if (ErrorCode > 0) {\r | |
895 | SendError ((UINT8)ErrorCode);\r | |
896 | return;\r | |
897 | }\r | |
898 | \r | |
899 | switch (Type) {\r | |
e7108d0e | 900 | case 0: // Software breakpoint\r |
1e57a462 | 901 | BreakType = SoftwareBreakpoint;\r |
902 | break;\r | |
3402aac7 | 903 | \r |
e7108d0e | 904 | case 1: // Hardware breakpoint\r |
1e57a462 | 905 | BreakType = InstructionExecution;\r |
906 | break;\r | |
3402aac7 | 907 | \r |
e7108d0e | 908 | case 2: // Write watchpoint\r |
1e57a462 | 909 | BreakType = DataWrite;\r |
910 | break;\r | |
911 | \r | |
e7108d0e | 912 | case 3: // Read watchpoint\r |
1e57a462 | 913 | BreakType = DataRead;\r |
914 | break;\r | |
915 | \r | |
e7108d0e | 916 | case 4: // Access watchpoint\r |
1e57a462 | 917 | BreakType = DataReadWrite;\r |
918 | break;\r | |
919 | \r | |
e7108d0e | 920 | default:\r |
1e57a462 | 921 | SendError (GDB_EINVALIDBRKPOINTTYPE);\r |
922 | return;\r | |
923 | }\r | |
924 | \r | |
e7108d0e | 925 | // Find matching debug register\r |
1e57a462 | 926 | Status = FindMatchingDebugRegister (SystemContext, Address, Length, (UINTN)BreakType, &Register);\r |
e7108d0e | 927 | if (EFI_ERROR (Status)) {\r |
1e57a462 | 928 | if (Status == EFI_UNSUPPORTED) {\r |
929 | Print ((CHAR16 *)L"Not supported.\n");\r | |
6f711615 | 930 | SendNotSupported ();\r |
1e57a462 | 931 | return;\r |
932 | }\r | |
933 | \r | |
934 | Print ((CHAR16 *)L"No matching register found.\n");\r | |
935 | SendError (GDB_ENOSPACE);\r | |
936 | return;\r | |
937 | }\r | |
938 | \r | |
e7108d0e | 939 | // Remove breakpoint\r |
6f711615 | 940 | Status = DisableDebugRegister (SystemContext, Register);\r |
e7108d0e | 941 | if (EFI_ERROR (Status)) {\r |
1e57a462 | 942 | Print ((CHAR16 *)L"Invalid argument.\n");\r |
943 | SendError (GDB_EINVALIDARG);\r | |
944 | return;\r | |
945 | }\r | |
946 | \r | |
947 | SendSuccess ();\r | |
948 | }\r | |
949 | \r | |
1e57a462 | 950 | VOID\r |
951 | InitializeProcessor (\r | |
952 | VOID\r | |
953 | )\r | |
954 | {\r | |
955 | }\r | |
956 | \r | |
957 | BOOLEAN\r | |
958 | ValidateAddress (\r | |
959 | IN VOID *Address\r | |
960 | )\r | |
961 | {\r | |
962 | return TRUE;\r | |
963 | }\r | |
964 | \r | |
965 | BOOLEAN\r | |
966 | ValidateException (\r | |
e7108d0e MK |
967 | IN EFI_EXCEPTION_TYPE ExceptionType,\r |
968 | IN OUT EFI_SYSTEM_CONTEXT SystemContext\r | |
1e57a462 | 969 | )\r |
970 | {\r | |
971 | return TRUE;\r | |
972 | }\r |