]>
Commit | Line | Data |
---|---|---|
2ef2b01e A |
1 | /** @file\r |
2 | Processor specific parts of the GDB stub\r | |
3 | \r | |
60274cca | 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 |
2ef2b01e | 7 | \r |
2ef2b01e A |
8 | **/\r |
9 | \r | |
10 | #include <GdbStubInternal.h>\r | |
11 | #include <Library/CacheMaintenanceLib.h>\r | |
12 | #include <Library/PrintLib.h>\r | |
13 | \r | |
14 | //\r | |
15 | // Array of exception types that need to be hooked by the debugger\r | |
16 | // (efi, gdb) //efi number\r | |
17 | //\r | |
e7108d0e MK |
18 | EFI_EXCEPTION_TYPE_ENTRY gExceptionType[] = {\r |
19 | { EXCEPT_ARM_SOFTWARE_INTERRUPT, GDB_SIGTRAP }\r | |
20 | // { EXCEPT_ARM_UNDEFINED_INSTRUCTION, GDB_SIGTRAP },\r | |
21 | // { EXCEPT_ARM_PREFETCH_ABORT, GDB_SIGTRAP },\r | |
22 | // { EXCEPT_ARM_DATA_ABORT, GDB_SIGEMT },\r | |
23 | // { EXCEPT_ARM_RESERVED, GDB_SIGILL }\r | |
2ef2b01e A |
24 | };\r |
25 | \r | |
26 | // Shut up some annoying RVCT warnings\r | |
27 | #ifdef __CC_ARM\r | |
e7108d0e | 28 | #pragma diag_suppress 1296\r |
2ef2b01e A |
29 | #endif\r |
30 | \r | |
e7108d0e MK |
31 | UINTN gRegisterOffsets[] = {\r |
32 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, R0),\r | |
33 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, R1),\r | |
34 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, R2),\r | |
35 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, R3),\r | |
36 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, R4),\r | |
37 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, R5),\r | |
38 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, R6),\r | |
39 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, R7),\r | |
40 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, R8),\r | |
41 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, R9),\r | |
42 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, R10),\r | |
43 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, R11),\r | |
44 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, R12),\r | |
45 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, SP),\r | |
46 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, LR),\r | |
47 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, PC),\r | |
48 | 0x00000F01, // f0\r | |
2ef2b01e A |
49 | 0x00000F02,\r |
50 | 0x00000F03,\r | |
e7108d0e | 51 | 0x00000F11, // f1\r |
2ef2b01e A |
52 | 0x00000F12,\r |
53 | 0x00000F13,\r | |
e7108d0e | 54 | 0x00000F21, // f2\r |
2ef2b01e A |
55 | 0x00000F22,\r |
56 | 0x00000F23,\r | |
e7108d0e | 57 | 0x00000F31, // f3\r |
2ef2b01e A |
58 | 0x00000F32,\r |
59 | 0x00000F33,\r | |
e7108d0e | 60 | 0x00000F41, // f4\r |
2ef2b01e A |
61 | 0x00000F42,\r |
62 | 0x00000F43,\r | |
e7108d0e | 63 | 0x00000F51, // f5\r |
2ef2b01e A |
64 | 0x00000F52,\r |
65 | 0x00000F53,\r | |
e7108d0e | 66 | 0x00000F61, // f6\r |
2ef2b01e A |
67 | 0x00000F62,\r |
68 | 0x00000F63,\r | |
e7108d0e | 69 | 0x00000F71, // f7\r |
2ef2b01e A |
70 | 0x00000F72,\r |
71 | 0x00000F73,\r | |
e7108d0e MK |
72 | 0x00000FFF, // fps\r |
73 | OFFSET_OF (EFI_SYSTEM_CONTEXT_ARM, CPSR)\r | |
2ef2b01e A |
74 | };\r |
75 | \r | |
76 | // restore warnings for RVCT\r | |
77 | #ifdef __CC_ARM\r | |
e7108d0e | 78 | #pragma diag_default 1296\r |
2ef2b01e A |
79 | #endif\r |
80 | \r | |
81 | /**\r | |
82 | Return the number of entries in the gExceptionType[]\r | |
3402aac7 RC |
83 | \r |
84 | @retval UINTN, the number of entries in the gExceptionType[] array.\r | |
2ef2b01e A |
85 | **/\r |
86 | UINTN\r | |
87 | MaxEfiException (\r | |
88 | VOID\r | |
89 | )\r | |
90 | {\r | |
6f711615 | 91 | return sizeof (gExceptionType) / sizeof (EFI_EXCEPTION_TYPE_ENTRY);\r |
2ef2b01e A |
92 | }\r |
93 | \r | |
2ef2b01e A |
94 | /**\r |
95 | Return the number of entries in the gRegisters[]\r | |
3402aac7 RC |
96 | \r |
97 | @retval UINTN, the number of entries (registers) in the gRegisters[] array.\r | |
2ef2b01e A |
98 | **/\r |
99 | UINTN\r | |
100 | MaxRegisterCount (\r | |
101 | VOID\r | |
102 | )\r | |
103 | {\r | |
6f711615 | 104 | return sizeof (gRegisterOffsets) / sizeof (UINTN);\r |
2ef2b01e A |
105 | }\r |
106 | \r | |
2ef2b01e | 107 | /**\r |
3402aac7 | 108 | Check to see if the ISA is supported.\r |
2ef2b01e A |
109 | ISA = Instruction Set Architecture\r |
110 | \r | |
3402aac7 | 111 | @retval TRUE if Isa is supported\r |
2ef2b01e A |
112 | \r |
113 | **/\r | |
114 | BOOLEAN\r | |
115 | CheckIsa (\r | |
116 | IN EFI_INSTRUCTION_SET_ARCHITECTURE Isa\r | |
117 | )\r | |
118 | {\r | |
119 | if (Isa == IsaArm) {\r | |
120 | return TRUE;\r | |
121 | } else {\r | |
122 | return FALSE;\r | |
123 | }\r | |
124 | }\r | |
125 | \r | |
2ef2b01e A |
126 | /**\r |
127 | This takes in the register number and the System Context, and returns a pointer to the RegNumber-th register in gdb ordering\r | |
128 | It is, by default, set to find the register pointer of the ARM member\r | |
3402aac7 | 129 | @param SystemContext Register content at time of the exception\r |
2ef2b01e A |
130 | @param RegNumber The register to which we want to find a pointer\r |
131 | @retval the pointer to the RegNumber-th pointer\r | |
3402aac7 | 132 | **/\r |
2ef2b01e | 133 | UINTN *\r |
6f711615 | 134 | FindPointerToRegister (\r |
e7108d0e MK |
135 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
136 | IN UINTN RegNumber\r | |
2ef2b01e A |
137 | )\r |
138 | {\r | |
e7108d0e MK |
139 | UINT8 *TempPtr;\r |
140 | \r | |
141 | ASSERT (gRegisterOffsets[RegNumber] < 0xF00);\r | |
2ef2b01e A |
142 | TempPtr = ((UINT8 *)SystemContext.SystemContextArm) + gRegisterOffsets[RegNumber];\r |
143 | return (UINT32 *)TempPtr;\r | |
144 | }\r | |
145 | \r | |
2ef2b01e A |
146 | /**\r |
147 | Adds the RegNumber-th register's value to the output buffer, starting at the given OutBufPtr\r | |
148 | @param SystemContext Register content at time of the exception\r | |
149 | @param RegNumber the number of the register that we want to read\r | |
150 | @param OutBufPtr pointer to the output buffer's end. the new data will be added from this point on.\r | |
151 | @retval the pointer to the next character of the output buffer that is available to be written on.\r | |
152 | **/\r | |
153 | CHAR8 *\r | |
154 | BasicReadRegister (\r | |
155 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
156 | IN UINTN RegNumber,\r | |
157 | IN CHAR8 *OutBufPtr\r | |
158 | )\r | |
159 | {\r | |
e7108d0e MK |
160 | UINTN RegSize;\r |
161 | CHAR8 Char;\r | |
3402aac7 | 162 | \r |
2ef2b01e | 163 | if (gRegisterOffsets[RegNumber] > 0xF00) {\r |
6f711615 | 164 | AsciiSPrint (OutBufPtr, 9, "00000000");\r |
2ef2b01e A |
165 | OutBufPtr += 8;\r |
166 | return OutBufPtr;\r | |
167 | }\r | |
168 | \r | |
169 | RegSize = 0;\r | |
170 | while (RegSize < 32) {\r | |
6f711615 | 171 | Char = mHexToStr[(UINT8)((*FindPointerToRegister (SystemContext, RegNumber) >> (RegSize+4)) & 0xf)];\r |
2ef2b01e A |
172 | if ((Char >= 'A') && (Char <= 'F')) {\r |
173 | Char = Char - 'A' + 'a';\r | |
174 | }\r | |
e7108d0e | 175 | \r |
2ef2b01e | 176 | *OutBufPtr++ = Char;\r |
3402aac7 | 177 | \r |
6f711615 | 178 | Char = mHexToStr[(UINT8)((*FindPointerToRegister (SystemContext, RegNumber) >> RegSize) & 0xf)];\r |
2ef2b01e A |
179 | if ((Char >= 'A') && (Char <= 'F')) {\r |
180 | Char = Char - 'A' + 'a';\r | |
181 | }\r | |
e7108d0e | 182 | \r |
2ef2b01e | 183 | *OutBufPtr++ = Char;\r |
3402aac7 | 184 | \r |
2ef2b01e A |
185 | RegSize = RegSize + 8;\r |
186 | }\r | |
e7108d0e | 187 | \r |
2ef2b01e A |
188 | return OutBufPtr;\r |
189 | }\r | |
190 | \r | |
11c20f4e | 191 | /**\r |
3402aac7 | 192 | Reads the n-th register's value into an output buffer and sends it as a packet\r |
2ef2b01e A |
193 | @param SystemContext Register content at time of the exception\r |
194 | @param InBuffer Pointer to the input buffer received from gdb server\r | |
195 | **/\r | |
196 | VOID\r | |
197 | ReadNthRegister (\r | |
198 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
199 | IN CHAR8 *InBuffer\r | |
200 | )\r | |
201 | {\r | |
e7108d0e MK |
202 | UINTN RegNumber;\r |
203 | CHAR8 OutBuffer[9]; // 1 reg=8 hex chars, and the end '\0' (escape seq)\r | |
204 | CHAR8 *OutBufPtr; // pointer to the output buffer\r | |
3402aac7 | 205 | \r |
2ef2b01e | 206 | RegNumber = AsciiStrHexToUintn (&InBuffer[1]);\r |
3402aac7 | 207 | \r |
6f711615 | 208 | if (RegNumber >= MaxRegisterCount ()) {\r |
3402aac7 | 209 | SendError (GDB_EINVALIDREGNUM);\r |
2ef2b01e A |
210 | return;\r |
211 | }\r | |
3402aac7 | 212 | \r |
2ef2b01e A |
213 | OutBufPtr = OutBuffer;\r |
214 | OutBufPtr = BasicReadRegister (SystemContext, RegNumber, OutBufPtr);\r | |
3402aac7 | 215 | \r |
2ef2b01e | 216 | *OutBufPtr = '\0'; // the end of the buffer\r |
6f711615 | 217 | SendPacket (OutBuffer);\r |
2ef2b01e A |
218 | }\r |
219 | \r | |
11c20f4e | 220 | /**\r |
3402aac7 | 221 | Reads the general registers into an output buffer and sends it as a packet\r |
2ef2b01e A |
222 | @param SystemContext Register content at time of the exception\r |
223 | **/\r | |
224 | VOID\r | |
225 | EFIAPI\r | |
3402aac7 | 226 | ReadGeneralRegisters (\r |
e7108d0e | 227 | IN EFI_SYSTEM_CONTEXT SystemContext\r |
2ef2b01e A |
228 | )\r |
229 | {\r | |
e7108d0e MK |
230 | UINTN Index;\r |
231 | CHAR8 *OutBuffer;\r | |
232 | CHAR8 *OutBufPtr;\r | |
233 | UINTN RegisterCount = MaxRegisterCount ();\r | |
3402aac7 | 234 | \r |
2ef2b01e | 235 | // It is not safe to allocate pool here....\r |
6f711615 | 236 | OutBuffer = AllocatePool ((RegisterCount * 8) + 1); // 8 bytes per register in string format plus a null to terminate\r |
2ef2b01e A |
237 | OutBufPtr = OutBuffer;\r |
238 | for (Index = 0; Index < RegisterCount; Index++) {\r | |
239 | OutBufPtr = BasicReadRegister (SystemContext, Index, OutBufPtr);\r | |
240 | }\r | |
3402aac7 | 241 | \r |
2ef2b01e | 242 | *OutBufPtr = '\0';\r |
6f711615 | 243 | SendPacket (OutBuffer);\r |
244 | FreePool (OutBuffer);\r | |
2ef2b01e A |
245 | }\r |
246 | \r | |
2ef2b01e A |
247 | /**\r |
248 | Adds the RegNumber-th register's value to the output buffer, starting at the given OutBufPtr\r | |
249 | @param SystemContext Register content at time of the exception\r | |
250 | @param RegNumber the number of the register that we want to write\r | |
251 | @param InBufPtr pointer to the output buffer. the new data will be extracted from the input buffer from this point on.\r | |
252 | @retval the pointer to the next character of the input buffer that can be used\r | |
253 | **/\r | |
254 | CHAR8\r | |
e7108d0e MK |
255 | *\r |
256 | BasicWriteRegister (\r | |
257 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
258 | IN UINTN RegNumber,\r | |
259 | IN CHAR8 *InBufPtr\r | |
2ef2b01e A |
260 | )\r |
261 | {\r | |
e7108d0e MK |
262 | UINTN RegSize;\r |
263 | UINTN TempValue; // the value transferred from a hex char\r | |
264 | UINT32 NewValue; // the new value of the RegNumber-th Register\r | |
3402aac7 | 265 | \r |
2ef2b01e A |
266 | if (gRegisterOffsets[RegNumber] > 0xF00) {\r |
267 | return InBufPtr + 8;\r | |
268 | }\r | |
269 | \r | |
270 | NewValue = 0;\r | |
e7108d0e | 271 | RegSize = 0;\r |
2ef2b01e | 272 | while (RegSize < 32) {\r |
6f711615 | 273 | TempValue = HexCharToInt (*InBufPtr++);\r |
3402aac7 | 274 | \r |
2ef2b01e | 275 | if ((INTN)TempValue < 0) {\r |
3402aac7 | 276 | SendError (GDB_EBADMEMDATA);\r |
2ef2b01e A |
277 | return NULL;\r |
278 | }\r | |
3402aac7 | 279 | \r |
2ef2b01e | 280 | NewValue += (TempValue << (RegSize+4));\r |
6f711615 | 281 | TempValue = HexCharToInt (*InBufPtr++);\r |
3402aac7 | 282 | \r |
2ef2b01e | 283 | if ((INTN)TempValue < 0) {\r |
3402aac7 | 284 | SendError (GDB_EBADMEMDATA);\r |
2ef2b01e A |
285 | return NULL;\r |
286 | }\r | |
3402aac7 RC |
287 | \r |
288 | NewValue += (TempValue << RegSize);\r | |
e7108d0e | 289 | RegSize = RegSize + 8;\r |
2ef2b01e | 290 | }\r |
e7108d0e | 291 | \r |
6f711615 | 292 | *(FindPointerToRegister (SystemContext, RegNumber)) = NewValue;\r |
2ef2b01e A |
293 | return InBufPtr;\r |
294 | }\r | |
295 | \r | |
2ef2b01e A |
296 | /** ‘P n...=r...’\r |
297 | Writes the new value of n-th register received into the input buffer to the n-th register\r | |
298 | @param SystemContext Register content at time of the exception\r | |
c6a72cd7 | 299 | @param InBuffer Pointer to the input buffer received from gdb server\r |
2ef2b01e A |
300 | **/\r |
301 | VOID\r | |
302 | WriteNthRegister (\r | |
e7108d0e MK |
303 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
304 | IN CHAR8 *InBuffer\r | |
2ef2b01e A |
305 | )\r |
306 | {\r | |
e7108d0e MK |
307 | UINTN RegNumber;\r |
308 | CHAR8 RegNumBuffer[MAX_REG_NUM_BUF_SIZE]; // put the 'n..' part of the message into this array\r | |
309 | CHAR8 *RegNumBufPtr;\r | |
310 | CHAR8 *InBufPtr; // pointer to the input buffer\r | |
3402aac7 | 311 | \r |
2ef2b01e | 312 | // find the register number to write\r |
e7108d0e | 313 | InBufPtr = &InBuffer[1];\r |
2ef2b01e A |
314 | RegNumBufPtr = RegNumBuffer;\r |
315 | while (*InBufPtr != '=') {\r | |
316 | *RegNumBufPtr++ = *InBufPtr++;\r | |
3402aac7 | 317 | }\r |
e7108d0e | 318 | \r |
2ef2b01e | 319 | *RegNumBufPtr = '\0';\r |
e7108d0e | 320 | RegNumber = AsciiStrHexToUintn (RegNumBuffer);\r |
3402aac7 | 321 | \r |
2ef2b01e | 322 | // check if this is a valid Register Number\r |
6f711615 | 323 | if (RegNumber >= MaxRegisterCount ()) {\r |
3402aac7 | 324 | SendError (GDB_EINVALIDREGNUM);\r |
2ef2b01e A |
325 | return;\r |
326 | }\r | |
e7108d0e | 327 | \r |
2ef2b01e A |
328 | InBufPtr++; // skips the '=' character\r |
329 | BasicWriteRegister (SystemContext, RegNumber, InBufPtr);\r | |
e7108d0e | 330 | SendSuccess ();\r |
2ef2b01e A |
331 | }\r |
332 | \r | |
2ef2b01e A |
333 | /** ‘G XX...’\r |
334 | Writes the new values received into the input buffer to the general registers\r | |
335 | @param SystemContext Register content at time of the exception\r | |
336 | @param InBuffer Pointer to the input buffer received from gdb server\r | |
337 | **/\r | |
2ef2b01e A |
338 | VOID\r |
339 | EFIAPI\r | |
340 | WriteGeneralRegisters (\r | |
341 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
342 | IN CHAR8 *InBuffer\r | |
343 | )\r | |
344 | {\r | |
345 | UINTN i;\r | |
346 | CHAR8 *InBufPtr; /// pointer to the input buffer\r | |
347 | UINTN MinLength;\r | |
6f711615 | 348 | UINTN RegisterCount = MaxRegisterCount ();\r |
2ef2b01e A |
349 | \r |
350 | MinLength = (RegisterCount * 8) + 1; // 'G' plus the registers in ASCII format\r | |
3402aac7 | 351 | \r |
6f711615 | 352 | if (AsciiStrLen (InBuffer) < MinLength) {\r |
e7108d0e | 353 | // Bad message. Message is not the right length\r |
3402aac7 | 354 | SendError (GDB_EBADBUFSIZE);\r |
2ef2b01e A |
355 | return;\r |
356 | }\r | |
3402aac7 | 357 | \r |
2ef2b01e | 358 | InBufPtr = &InBuffer[1];\r |
3402aac7 | 359 | \r |
2ef2b01e A |
360 | // Read the new values for the registers from the input buffer to an array, NewValueArray.\r |
361 | // The values in the array are in the gdb ordering\r | |
6f711615 | 362 | for (i = 0; i < RegisterCount; i++) {\r |
2ef2b01e A |
363 | InBufPtr = BasicWriteRegister (SystemContext, i, InBufPtr);\r |
364 | }\r | |
3402aac7 | 365 | \r |
2ef2b01e A |
366 | SendSuccess ();\r |
367 | }\r | |
368 | \r | |
369 | // What about Thumb?\r | |
370 | // Use SWI 0xdbdbdb as the debug instruction\r | |
e7108d0e | 371 | #define GDB_ARM_BKPT 0xefdbdbdb\r |
2ef2b01e | 372 | \r |
e7108d0e MK |
373 | BOOLEAN mSingleStepActive = FALSE;\r |
374 | UINT32 mSingleStepPC;\r | |
375 | UINT32 mSingleStepData;\r | |
376 | UINTN mSingleStepDataSize;\r | |
2ef2b01e A |
377 | \r |
378 | typedef struct {\r | |
e7108d0e MK |
379 | LIST_ENTRY Link;\r |
380 | UINT64 Signature;\r | |
381 | UINT32 Address;\r | |
382 | UINT32 Instruction;\r | |
2ef2b01e A |
383 | } ARM_SOFTWARE_BREAKPOINT;\r |
384 | \r | |
e7108d0e | 385 | #define ARM_SOFTWARE_BREAKPOINT_SIGNATURE SIGNATURE_64('A', 'R', 'M', 'B', 'R', 'K', 'P', 'T')\r |
2ef2b01e A |
386 | #define ARM_SOFTWARE_BREAKPOINT_FROM_LINK(a) CR(a, ARM_SOFTWARE_BREAKPOINT, Link, ARM_SOFTWARE_BREAKPOINT_SIGNATURE)\r |
387 | \r | |
388 | LIST_ENTRY BreakpointList;\r | |
389 | \r | |
3402aac7 | 390 | /**\r |
2ef2b01e | 391 | Insert Single Step in the SystemContext\r |
3402aac7 | 392 | \r |
91c38d4e | 393 | @param SystemContext Register content at time of the exception\r |
2ef2b01e A |
394 | **/\r |
395 | VOID\r | |
396 | AddSingleStep (\r | |
e7108d0e | 397 | IN EFI_SYSTEM_CONTEXT SystemContext\r |
2ef2b01e A |
398 | )\r |
399 | {\r | |
400 | if (mSingleStepActive) {\r | |
401 | // Currently don't support nesting\r | |
402 | return;\r | |
403 | }\r | |
e7108d0e | 404 | \r |
2ef2b01e | 405 | mSingleStepActive = TRUE;\r |
3402aac7 | 406 | \r |
2ef2b01e A |
407 | mSingleStepPC = SystemContext.SystemContextArm->PC;\r |
408 | \r | |
e7108d0e MK |
409 | mSingleStepDataSize = sizeof (UINT32);\r |
410 | mSingleStepData = (*(UINT32 *)mSingleStepPC);\r | |
2ef2b01e A |
411 | *(UINT32 *)mSingleStepPC = GDB_ARM_BKPT;\r |
412 | if (*(UINT32 *)mSingleStepPC != GDB_ARM_BKPT) {\r | |
413 | // For some reason our breakpoint did not take\r | |
414 | mSingleStepActive = FALSE;\r | |
415 | }\r | |
416 | \r | |
6f711615 | 417 | InvalidateInstructionCacheRange ((VOID *)mSingleStepPC, mSingleStepDataSize);\r |
e7108d0e | 418 | // DEBUG((DEBUG_ERROR, "AddSingleStep at 0x%08x (was: 0x%08x is:0x%08x)\n", SystemContext.SystemContextArm->PC, mSingleStepData, *(UINT32 *)mSingleStepPC));\r |
2ef2b01e A |
419 | }\r |
420 | \r | |
3402aac7 | 421 | /**\r |
2ef2b01e | 422 | Remove Single Step in the SystemContext\r |
3402aac7 | 423 | \r |
91c38d4e | 424 | @param SystemContext Register content at time of the exception\r |
2ef2b01e A |
425 | **/\r |
426 | VOID\r | |
427 | RemoveSingleStep (\r | |
428 | IN EFI_SYSTEM_CONTEXT SystemContext\r | |
429 | )\r | |
430 | {\r | |
431 | if (!mSingleStepActive) {\r | |
432 | return;\r | |
433 | }\r | |
3402aac7 | 434 | \r |
2ef2b01e A |
435 | if (mSingleStepDataSize == sizeof (UINT16)) {\r |
436 | *(UINT16 *)mSingleStepPC = (UINT16)mSingleStepData;\r | |
437 | } else {\r | |
e7108d0e | 438 | // DEBUG((DEBUG_ERROR, "RemoveSingleStep at 0x%08x (was: 0x%08x is:0x%08x)\n", SystemContext.SystemContextArm->PC, *(UINT32 *)mSingleStepPC, mSingleStepData));\r |
2ef2b01e A |
439 | *(UINT32 *)mSingleStepPC = mSingleStepData;\r |
440 | }\r | |
e7108d0e | 441 | \r |
6f711615 | 442 | InvalidateInstructionCacheRange ((VOID *)mSingleStepPC, mSingleStepDataSize);\r |
2ef2b01e A |
443 | mSingleStepActive = FALSE;\r |
444 | }\r | |
445 | \r | |
11c20f4e | 446 | /**\r |
3402aac7 | 447 | Continue. addr is Address to resume. If addr is omitted, resume at current\r |
2ef2b01e | 448 | Address.\r |
3402aac7 RC |
449 | \r |
450 | @param SystemContext Register content at time of the exception\r | |
2ef2b01e A |
451 | **/\r |
452 | VOID\r | |
453 | EFIAPI\r | |
454 | ContinueAtAddress (\r | |
e7108d0e MK |
455 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
456 | IN CHAR8 *PacketData\r | |
2ef2b01e A |
457 | )\r |
458 | {\r | |
459 | if (PacketData[1] != '\0') {\r | |
6f711615 | 460 | SystemContext.SystemContextArm->PC = AsciiStrHexToUintn (&PacketData[1]);\r |
3402aac7 | 461 | }\r |
2ef2b01e A |
462 | }\r |
463 | \r | |
2ef2b01e | 464 | /** ‘s [addr ]’\r |
3402aac7 | 465 | Single step. addr is the Address at which to resume. If addr is omitted, resume\r |
2ef2b01e | 466 | at same Address.\r |
3402aac7 RC |
467 | \r |
468 | @param SystemContext Register content at time of the exception\r | |
2ef2b01e A |
469 | **/\r |
470 | VOID\r | |
471 | EFIAPI\r | |
472 | SingleStep (\r | |
e7108d0e MK |
473 | IN EFI_SYSTEM_CONTEXT SystemContext,\r |
474 | IN CHAR8 *PacketData\r | |
2ef2b01e A |
475 | )\r |
476 | {\r | |
6f711615 | 477 | SendNotSupported ();\r |
2ef2b01e A |
478 | }\r |
479 | \r | |
480 | UINTN\r | |
481 | GetBreakpointDataAddress (\r | |
482 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
483 | IN UINTN BreakpointNumber\r | |
484 | )\r | |
485 | {\r | |
486 | return 0;\r | |
487 | }\r | |
488 | \r | |
489 | UINTN\r | |
490 | GetBreakpointDetected (\r | |
491 | IN EFI_SYSTEM_CONTEXT SystemContext\r | |
492 | )\r | |
493 | {\r | |
494 | return 0;\r | |
495 | }\r | |
496 | \r | |
497 | BREAK_TYPE\r | |
498 | GetBreakpointType (\r | |
499 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
500 | IN UINTN BreakpointNumber\r | |
501 | )\r | |
502 | {\r | |
503 | return NotSupported;\r | |
504 | }\r | |
505 | \r | |
506 | ARM_SOFTWARE_BREAKPOINT *\r | |
507 | SearchBreakpointList (\r | |
508 | IN UINT32 Address\r | |
509 | )\r | |
510 | {\r | |
e7108d0e MK |
511 | LIST_ENTRY *Current;\r |
512 | ARM_SOFTWARE_BREAKPOINT *Breakpoint;\r | |
2ef2b01e | 513 | \r |
6f711615 | 514 | Current = GetFirstNode (&BreakpointList);\r |
515 | while (!IsNull (&BreakpointList, Current)) {\r | |
e7108d0e | 516 | Breakpoint = ARM_SOFTWARE_BREAKPOINT_FROM_LINK (Current);\r |
2ef2b01e A |
517 | \r |
518 | if (Address == Breakpoint->Address) {\r | |
519 | return Breakpoint;\r | |
520 | }\r | |
521 | \r | |
6f711615 | 522 | Current = GetNextNode (&BreakpointList, Current);\r |
2ef2b01e A |
523 | }\r |
524 | \r | |
525 | return NULL;\r | |
526 | }\r | |
527 | \r | |
528 | VOID\r | |
529 | SetBreakpoint (\r | |
e7108d0e | 530 | IN UINT32 Address\r |
2ef2b01e A |
531 | )\r |
532 | {\r | |
e7108d0e | 533 | ARM_SOFTWARE_BREAKPOINT *Breakpoint;\r |
2ef2b01e | 534 | \r |
6f711615 | 535 | Breakpoint = SearchBreakpointList (Address);\r |
2ef2b01e A |
536 | \r |
537 | if (Breakpoint != NULL) {\r | |
538 | return;\r | |
539 | }\r | |
540 | \r | |
541 | // create and fill breakpoint structure\r | |
e7108d0e | 542 | Breakpoint = AllocatePool (sizeof (ARM_SOFTWARE_BREAKPOINT));\r |
2ef2b01e A |
543 | \r |
544 | Breakpoint->Signature = ARM_SOFTWARE_BREAKPOINT_SIGNATURE;\r | |
545 | Breakpoint->Address = Address;\r | |
546 | Breakpoint->Instruction = *(UINT32 *)Address;\r | |
3402aac7 | 547 | \r |
2ef2b01e | 548 | // Add it to the list\r |
6f711615 | 549 | InsertTailList (&BreakpointList, &Breakpoint->Link);\r |
2ef2b01e A |
550 | \r |
551 | // Insert the software breakpoint\r | |
552 | *(UINT32 *)Address = GDB_ARM_BKPT;\r | |
6f711615 | 553 | InvalidateInstructionCacheRange ((VOID *)Address, 4);\r |
2ef2b01e | 554 | \r |
e7108d0e | 555 | // DEBUG((DEBUG_ERROR, "SetBreakpoint at 0x%08x (was: 0x%08x is:0x%08x)\n", Address, Breakpoint->Instruction, *(UINT32 *)Address));\r |
2ef2b01e A |
556 | }\r |
557 | \r | |
558 | VOID\r | |
559 | ClearBreakpoint (\r | |
e7108d0e | 560 | IN UINT32 Address\r |
2ef2b01e A |
561 | )\r |
562 | {\r | |
e7108d0e | 563 | ARM_SOFTWARE_BREAKPOINT *Breakpoint;\r |
2ef2b01e | 564 | \r |
6f711615 | 565 | Breakpoint = SearchBreakpointList (Address);\r |
2ef2b01e A |
566 | \r |
567 | if (Breakpoint == NULL) {\r | |
568 | return;\r | |
569 | }\r | |
570 | \r | |
571 | // Add it to the list\r | |
6f711615 | 572 | RemoveEntryList (&Breakpoint->Link);\r |
2ef2b01e A |
573 | \r |
574 | // Restore the original instruction\r | |
575 | *(UINT32 *)Address = Breakpoint->Instruction;\r | |
6f711615 | 576 | InvalidateInstructionCacheRange ((VOID *)Address, 4);\r |
2ef2b01e | 577 | \r |
e7108d0e | 578 | // DEBUG((DEBUG_ERROR, "ClearBreakpoint at 0x%08x (was: 0x%08x is:0x%08x)\n", Address, GDB_ARM_BKPT, *(UINT32 *)Address));\r |
2ef2b01e | 579 | \r |
6f711615 | 580 | FreePool (Breakpoint);\r |
2ef2b01e A |
581 | }\r |
582 | \r | |
583 | VOID\r | |
584 | EFIAPI\r | |
585 | InsertBreakPoint (\r | |
586 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
e7108d0e | 587 | IN CHAR8 *PacketData\r |
2ef2b01e A |
588 | )\r |
589 | {\r | |
e7108d0e MK |
590 | UINTN Type;\r |
591 | UINTN Address;\r | |
592 | UINTN Length;\r | |
593 | UINTN ErrorCode;\r | |
2ef2b01e | 594 | \r |
6f711615 | 595 | ErrorCode = ParseBreakpointPacket (PacketData, &Type, &Address, &Length);\r |
2ef2b01e A |
596 | if (ErrorCode > 0) {\r |
597 | SendError ((UINT8)ErrorCode);\r | |
598 | return;\r | |
599 | }\r | |
600 | \r | |
601 | switch (Type) {\r | |
e7108d0e | 602 | case 0: // Software breakpoint\r |
2ef2b01e A |
603 | break;\r |
604 | \r | |
e7108d0e MK |
605 | default:\r |
606 | DEBUG ((DEBUG_ERROR, "Insert breakpoint default: %x\n", Type));\r | |
2ef2b01e A |
607 | SendError (GDB_EINVALIDBRKPOINTTYPE);\r |
608 | return;\r | |
609 | }\r | |
610 | \r | |
6f711615 | 611 | SetBreakpoint (Address);\r |
2ef2b01e A |
612 | \r |
613 | SendSuccess ();\r | |
614 | }\r | |
615 | \r | |
616 | VOID\r | |
617 | EFIAPI\r | |
618 | RemoveBreakPoint (\r | |
619 | IN EFI_SYSTEM_CONTEXT SystemContext,\r | |
620 | IN CHAR8 *PacketData\r | |
621 | )\r | |
622 | {\r | |
e7108d0e MK |
623 | UINTN Type;\r |
624 | UINTN Address;\r | |
625 | UINTN Length;\r | |
626 | UINTN ErrorCode;\r | |
2ef2b01e | 627 | \r |
e7108d0e | 628 | // Parse breakpoint packet data\r |
2ef2b01e A |
629 | ErrorCode = ParseBreakpointPacket (PacketData, &Type, &Address, &Length);\r |
630 | if (ErrorCode > 0) {\r | |
631 | SendError ((UINT8)ErrorCode);\r | |
632 | return;\r | |
633 | }\r | |
634 | \r | |
635 | switch (Type) {\r | |
e7108d0e | 636 | case 0: // Software breakpoint\r |
2ef2b01e | 637 | break;\r |
3402aac7 | 638 | \r |
2ef2b01e A |
639 | default:\r |
640 | SendError (GDB_EINVALIDBRKPOINTTYPE);\r | |
641 | return;\r | |
642 | }\r | |
643 | \r | |
6f711615 | 644 | ClearBreakpoint (Address);\r |
2ef2b01e A |
645 | \r |
646 | SendSuccess ();\r | |
647 | }\r | |
648 | \r | |
649 | VOID\r | |
650 | InitializeProcessor (\r | |
651 | VOID\r | |
652 | )\r | |
653 | {\r | |
654 | // Initialize breakpoint list\r | |
6f711615 | 655 | InitializeListHead (&BreakpointList);\r |
2ef2b01e A |
656 | }\r |
657 | \r | |
658 | BOOLEAN\r | |
659 | ValidateAddress (\r | |
660 | IN VOID *Address\r | |
661 | )\r | |
662 | {\r | |
663 | if ((UINT32)Address < 0x80000000) {\r | |
664 | return FALSE;\r | |
665 | } else {\r | |
666 | return TRUE;\r | |
667 | }\r | |
668 | }\r | |
669 | \r | |
670 | BOOLEAN\r | |
671 | ValidateException (\r | |
e7108d0e MK |
672 | IN EFI_EXCEPTION_TYPE ExceptionType,\r |
673 | IN OUT EFI_SYSTEM_CONTEXT SystemContext\r | |
2ef2b01e A |
674 | )\r |
675 | {\r | |
676 | UINT32 ExceptionAddress;\r | |
677 | UINT32 Instruction;\r | |
3402aac7 | 678 | \r |
2ef2b01e A |
679 | // Is it a debugger SWI?\r |
680 | ExceptionAddress = SystemContext.SystemContextArm->PC -= 4;\r | |
681 | Instruction = *(UINT32 *)ExceptionAddress;\r | |
682 | if (Instruction != GDB_ARM_BKPT) {\r | |
683 | return FALSE;\r | |
684 | }\r | |
685 | \r | |
686 | // Special for SWI-based exception handling. SWI sets up the context\r | |
687 | // to return to the instruction following the SWI instruction - NOT what we want\r | |
688 | // for a debugger!\r | |
689 | SystemContext.SystemContextArm->PC = ExceptionAddress;\r | |
690 | \r | |
691 | return TRUE;\r | |
692 | }\r |