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2ef2b01e A |
1 | /** @file\r |
2 | \r | |
3 | Copyright (c) 2008-2009, Apple Inc. All rights reserved.\r | |
4 | \r | |
5 | All rights reserved. This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include "CpuDxe.h" \r | |
f659880b | 16 | \r |
62e797a4 | 17 | EFI_DEBUG_IMAGE_INFO_TABLE_HEADER *gDebugImageTableHeader = NULL;\r |
2ef2b01e A |
18 | \r |
19 | VOID\r | |
20 | ExceptionHandlersStart (\r | |
21 | VOID\r | |
22 | );\r | |
23 | \r | |
24 | VOID\r | |
25 | ExceptionHandlersEnd (\r | |
26 | VOID\r | |
27 | );\r | |
28 | \r | |
29 | VOID\r | |
30 | CommonExceptionEntry (\r | |
31 | VOID\r | |
32 | );\r | |
33 | \r | |
34 | VOID\r | |
35 | AsmCommonExceptionEntry (\r | |
36 | VOID\r | |
37 | );\r | |
38 | \r | |
39 | \r | |
40 | EFI_EXCEPTION_CALLBACK gExceptionHandlers[MAX_ARM_EXCEPTION + 1];\r | |
41 | EFI_EXCEPTION_CALLBACK gDebuggerExceptionHandlers[MAX_ARM_EXCEPTION + 1];\r | |
42 | \r | |
43 | \r | |
44 | \r | |
45 | /**\r | |
46 | This function registers and enables the handler specified by InterruptHandler for a processor \r | |
47 | interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the \r | |
48 | handler for the processor interrupt or exception type specified by InterruptType is uninstalled. \r | |
49 | The installed handler is called once for each processor interrupt or exception.\r | |
50 | \r | |
51 | @param InterruptType A pointer to the processor's current interrupt state. Set to TRUE if interrupts\r | |
52 | are enabled and FALSE if interrupts are disabled.\r | |
53 | @param InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called\r | |
54 | when a processor interrupt occurs. If this parameter is NULL, then the handler\r | |
55 | will be uninstalled.\r | |
56 | \r | |
57 | @retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.\r | |
58 | @retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was\r | |
59 | previously installed.\r | |
60 | @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not\r | |
61 | previously installed.\r | |
62 | @retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported.\r | |
63 | \r | |
64 | **/\r | |
65 | EFI_STATUS\r | |
66 | RegisterInterruptHandler (\r | |
67 | IN EFI_EXCEPTION_TYPE InterruptType,\r | |
68 | IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler\r | |
69 | )\r | |
70 | {\r | |
71 | if (InterruptType > MAX_ARM_EXCEPTION) {\r | |
72 | return EFI_UNSUPPORTED;\r | |
73 | }\r | |
74 | \r | |
75 | if ((InterruptHandler != NULL) && (gExceptionHandlers[InterruptType] != NULL)) {\r | |
76 | return EFI_ALREADY_STARTED;\r | |
77 | }\r | |
78 | \r | |
79 | gExceptionHandlers[InterruptType] = InterruptHandler;\r | |
80 | \r | |
81 | return EFI_SUCCESS;\r | |
82 | }\r | |
83 | \r | |
84 | \r | |
85 | /**\r | |
86 | This function registers and enables the handler specified by InterruptHandler for a processor \r | |
87 | interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the \r | |
88 | handler for the processor interrupt or exception type specified by InterruptType is uninstalled. \r | |
89 | The installed handler is called once for each processor interrupt or exception.\r | |
90 | \r | |
91 | @param InterruptType A pointer to the processor's current interrupt state. Set to TRUE if interrupts\r | |
92 | are enabled and FALSE if interrupts are disabled.\r | |
93 | @param InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called\r | |
94 | when a processor interrupt occurs. If this parameter is NULL, then the handler\r | |
95 | will be uninstalled.\r | |
96 | \r | |
97 | @retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.\r | |
98 | @retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was\r | |
99 | previously installed.\r | |
100 | @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not\r | |
101 | previously installed.\r | |
102 | @retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported.\r | |
103 | \r | |
104 | **/\r | |
105 | EFI_STATUS\r | |
106 | RegisterDebuggerInterruptHandler (\r | |
107 | IN EFI_EXCEPTION_TYPE InterruptType,\r | |
108 | IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler\r | |
109 | )\r | |
110 | {\r | |
111 | if (InterruptType > MAX_ARM_EXCEPTION) {\r | |
112 | return EFI_UNSUPPORTED;\r | |
113 | }\r | |
114 | \r | |
115 | if ((InterruptHandler != NULL) && (gDebuggerExceptionHandlers[InterruptType] != NULL)) {\r | |
116 | return EFI_ALREADY_STARTED;\r | |
117 | }\r | |
118 | \r | |
119 | gDebuggerExceptionHandlers[InterruptType] = InterruptHandler;\r | |
120 | \r | |
121 | return EFI_SUCCESS;\r | |
122 | }\r | |
123 | \r | |
f659880b | 124 | \r |
f659880b A |
125 | \r |
126 | \r | |
127 | CHAR8 *\r | |
128 | GetImageName (\r | |
129 | IN UINT32 FaultAddress,\r | |
130 | OUT UINT32 *ImageBase,\r | |
131 | OUT UINT32 *PeCoffSizeOfHeaders\r | |
132 | )\r | |
133 | {\r | |
62e797a4 A |
134 | EFI_DEBUG_IMAGE_INFO *DebugTable;\r |
135 | UINTN Entry;\r | |
136 | CHAR8 *Address;\r | |
137 | \r | |
f659880b A |
138 | \r |
139 | DebugTable = gDebugImageTableHeader->EfiDebugImageInfoTable;\r | |
140 | if (DebugTable == NULL) {\r | |
141 | return NULL;\r | |
142 | }\r | |
143 | \r | |
144 | Address = (CHAR8 *)(UINTN)FaultAddress;\r | |
62e797a4 A |
145 | for (Entry = 0; Entry < gDebugImageTableHeader->TableSize; Entry++, DebugTable++) {\r |
146 | if (DebugTable->NormalImage != NULL) {\r | |
147 | if ((DebugTable->NormalImage->ImageInfoType == EFI_DEBUG_IMAGE_INFO_TYPE_NORMAL) && \r | |
148 | (DebugTable->NormalImage->LoadedImageProtocolInstance != NULL)) {\r | |
149 | if ((Address >= (CHAR8 *)DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase) &&\r | |
150 | (Address <= ((CHAR8 *)DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase + DebugTable->NormalImage->LoadedImageProtocolInstance->ImageSize))) {\r | |
151 | *ImageBase = (UINT32)DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase;\r | |
152 | *PeCoffSizeOfHeaders = PeCoffGetSizeOfHeaders ((VOID *)(UINTN)*ImageBase);\r | |
153 | return PeCoffLoaderGetPdbPointer (DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase);\r | |
154 | } \r | |
155 | }\r | |
156 | } \r | |
f659880b A |
157 | }\r |
158 | \r | |
159 | return NULL;\r | |
160 | }\r | |
161 | \r | |
235605b5 A |
162 | typedef struct {\r |
163 | UINT32 Bit;\r | |
164 | CHAR8 Char;\r | |
165 | } CPSR_CHAR;\r | |
166 | \r | |
f659880b | 167 | \r |
235605b5 A |
168 | VOID\r |
169 | CpsrString (\r | |
170 | IN UINT32 Cpsr,\r | |
171 | OUT CHAR8 *ReturnStr\r | |
172 | )\r | |
173 | {\r | |
174 | UINTN Index;\r | |
175 | CHAR8 *Str = ReturnStr;\r | |
176 | CHAR8 *ModeStr;\r | |
79b9790f A |
177 | CPSR_CHAR CpsrChar[] = {\r |
178 | { 31, 'n' },\r | |
179 | { 30, 'z' },\r | |
180 | { 29, 'c' },\r | |
181 | { 28, 'v' },\r | |
182 | \r | |
183 | { 9, 'e' },\r | |
184 | { 8, 'a' },\r | |
185 | { 7, 'i' },\r | |
186 | { 6, 'f' },\r | |
187 | { 5, 't' },\r | |
188 | { 0, '?' }\r | |
189 | };\r | |
235605b5 | 190 | \r |
79b9790f A |
191 | for (Index = 0; CpsrChar[Index].Bit != 0; Index++, Str++) {\r |
192 | *Str = CpsrChar[Index].Char;\r | |
193 | if ((Cpsr & (1 << CpsrChar[Index].Bit)) != 0) {\r | |
235605b5 A |
194 | // Concert to upper case if bit is set\r |
195 | *Str &= ~0x20;\r | |
196 | }\r | |
197 | }\r | |
198 | \r | |
199 | *Str++ = '_';\r | |
200 | *Str = '\0';\r | |
201 | \r | |
202 | switch (Cpsr & 0x1f) {\r | |
203 | case 0x17:\r | |
204 | ModeStr = "abt";\r | |
205 | break;\r | |
206 | case 0x011:\r | |
207 | ModeStr = "fiq";\r | |
208 | break;\r | |
209 | case 0x12:\r | |
210 | ModeStr = "irq";\r | |
211 | break;\r | |
212 | case 0x13:\r | |
213 | ModeStr = "svc";\r | |
214 | break;\r | |
215 | case 0x1f:\r | |
216 | ModeStr = "sys";\r | |
217 | break;\r | |
218 | case 0x1b:\r | |
219 | ModeStr = "und";\r | |
220 | break;\r | |
221 | case 0x10:\r | |
222 | ModeStr = "usr";\r | |
223 | break;\r | |
224 | \r | |
225 | default:\r | |
226 | ModeStr = "???";\r | |
227 | break;\r | |
228 | }\r | |
229 | \r | |
230 | AsciiStrCat (Str, ModeStr);\r | |
231 | return;\r | |
232 | } \r | |
233 | \r | |
8a4d81e6 A |
234 | CHAR8 *gExceptionTypeString[] = {\r |
235 | "Reset",\r | |
236 | "Undefined Instruction",\r | |
237 | "SWI",\r | |
238 | "Prefetch Abort",\r | |
239 | "Data Abort",\r | |
240 | "Undefined",\r | |
241 | "IRQ",\r | |
242 | "FIQ"\r | |
243 | };\r | |
2ef2b01e A |
244 | \r |
245 | VOID\r | |
246 | EFIAPI\r | |
247 | CommonCExceptionHandler (\r | |
248 | IN EFI_EXCEPTION_TYPE ExceptionType,\r | |
249 | IN OUT EFI_SYSTEM_CONTEXT SystemContext\r | |
250 | )\r | |
251 | {\r | |
252 | BOOLEAN Dispatched = FALSE;\r | |
8a4d81e6 | 253 | \r |
d213712d | 254 | \r |
2ef2b01e A |
255 | if (ExceptionType <= MAX_ARM_EXCEPTION) {\r |
256 | if (gDebuggerExceptionHandlers[ExceptionType]) {\r | |
257 | //\r | |
258 | // If DebugSupport hooked the interrupt call the handler. This does not disable \r | |
259 | // the normal handler.\r | |
260 | //\r | |
261 | gDebuggerExceptionHandlers[ExceptionType] (ExceptionType, SystemContext);\r | |
262 | Dispatched = TRUE;\r | |
263 | }\r | |
264 | if (gExceptionHandlers[ExceptionType]) {\r | |
265 | gExceptionHandlers[ExceptionType] (ExceptionType, SystemContext);\r | |
266 | Dispatched = TRUE;\r | |
267 | }\r | |
8a4d81e6 A |
268 | } else {\r |
269 | DEBUG ((EFI_D_ERROR, "Unknown exception type %d from %08x\n", ExceptionType, SystemContext.SystemContextArm->PC));\r | |
270 | ASSERT (FALSE);\r | |
2ef2b01e A |
271 | }\r |
272 | \r | |
273 | if (Dispatched) {\r | |
274 | //\r | |
275 | // We did work so this was an expected ExceptionType\r | |
276 | //\r | |
277 | return;\r | |
278 | }\r | |
279 | \r | |
280 | if (ExceptionType == EXCEPT_ARM_SOFTWARE_INTERRUPT) {\r | |
281 | //\r | |
282 | // ARM JTAG debuggers some times use this vector, so it is not an error to get one\r | |
283 | //\r | |
284 | return;\r | |
285 | }\r | |
286 | \r | |
287 | //\r | |
f659880b | 288 | // Code after here is the default exception handler... Dump the context\r |
2ef2b01e | 289 | //\r |
235605b5 | 290 | DEBUG ((EFI_D_ERROR, "\n%a Exception PC at 0x%08x CPSR 0x%08x ", gExceptionTypeString[ExceptionType], SystemContext.SystemContextArm->PC, SystemContext.SystemContextArm->CPSR));\r |
f659880b | 291 | DEBUG_CODE_BEGIN ();\r |
62e797a4 A |
292 | CHAR8 *Pdb;\r |
293 | UINT32 ImageBase;\r | |
294 | UINT32 PeCoffSizeOfHeader;\r | |
295 | UINT32 Offset;\r | |
235605b5 A |
296 | CHAR8 CpsrStr[32]; // char per bit. Lower 5-bits are mode that is a 3 char string\r |
297 | \r | |
298 | CpsrString (SystemContext.SystemContextArm->CPSR, CpsrStr);\r | |
299 | DEBUG ((EFI_D_ERROR, "%a\n", CpsrStr));\r | |
f659880b A |
300 | \r |
301 | Pdb = GetImageName (SystemContext.SystemContextArm->PC, &ImageBase, &PeCoffSizeOfHeader);\r | |
302 | Offset = SystemContext.SystemContextArm->PC - ImageBase;\r | |
303 | if (Pdb != NULL) {\r | |
304 | DEBUG ((EFI_D_ERROR, "%a\n", Pdb));\r | |
2ef2b01e | 305 | \r |
f659880b A |
306 | //\r |
307 | // A PE/COFF image loads its headers into memory so the headers are \r | |
308 | // included in the linked addressess. ELF and Mach-O images do not\r | |
309 | // include the headers so the first byte of the image is usually\r | |
310 | // text (code). If you look at link maps from ELF or Mach-O images\r | |
311 | // you need to subtact out the size of the PE/COFF header to get\r | |
312 | // get the offset that matches the link map. \r | |
313 | //\r | |
235605b5 | 314 | DEBUG ((EFI_D_ERROR, "loadded at 0x%08x (PE/COFF offset) 0x%x (ELF or Mach-O offset) 0x%x", ImageBase, Offset, Offset - PeCoffSizeOfHeader));\r |
f659880b A |
315 | }\r |
316 | DEBUG_CODE_END ();\r | |
235605b5 A |
317 | DEBUG ((EFI_D_ERROR, "\n R0 0x%08x R1 0x%08x R2 0x%08x R3 0x%08x\n", SystemContext.SystemContextArm->R0, SystemContext.SystemContextArm->R1, SystemContext.SystemContextArm->R2, SystemContext.SystemContextArm->R3));\r |
318 | DEBUG ((EFI_D_ERROR, " R4 0x%08x R5 0x%08x R6 0x%08x R7 0x%08x\n", SystemContext.SystemContextArm->R4, SystemContext.SystemContextArm->R5, SystemContext.SystemContextArm->R6, SystemContext.SystemContextArm->R7));\r | |
319 | DEBUG ((EFI_D_ERROR, " R8 0x%08x R9 0x%08x R10 0x%08x R11 0x%08x\n", SystemContext.SystemContextArm->R8, SystemContext.SystemContextArm->R9, SystemContext.SystemContextArm->R10, SystemContext.SystemContextArm->R11));\r | |
320 | DEBUG ((EFI_D_ERROR, " R12 0x%08x SP 0x%08x LR 0x%08x PC 0x%08x\n", SystemContext.SystemContextArm->R12, SystemContext.SystemContextArm->SP, SystemContext.SystemContextArm->LR, SystemContext.SystemContextArm->PC));\r | |
321 | DEBUG ((EFI_D_ERROR, "DFSR 0x%08x DFAR 0x%08x IFSR 0x%08x IFAR 0x%08x\n\n", SystemContext.SystemContextArm->DFSR, SystemContext.SystemContextArm->DFAR, SystemContext.SystemContextArm->IFSR, SystemContext.SystemContextArm->IFAR));\r | |
f659880b A |
322 | \r |
323 | ASSERT (FALSE);\r | |
2ef2b01e A |
324 | }\r |
325 | \r | |
326 | \r | |
327 | \r | |
328 | EFI_STATUS\r | |
329 | InitializeExceptions (\r | |
330 | IN EFI_CPU_ARCH_PROTOCOL *Cpu\r | |
331 | )\r | |
332 | {\r | |
333 | EFI_STATUS Status;\r | |
334 | UINTN Offset;\r | |
335 | UINTN Length;\r | |
336 | UINTN Index;\r | |
337 | BOOLEAN Enabled;\r | |
338 | EFI_PHYSICAL_ADDRESS Base;\r | |
339 | \r | |
62e797a4 A |
340 | Status = EfiGetSystemConfigurationTable (&gEfiDebugImageInfoTableGuid, (VOID **)&gDebugImageTableHeader);\r |
341 | if (EFI_ERROR (Status)) {\r | |
342 | gDebugImageTableHeader = NULL;\r | |
343 | }\r | |
f659880b | 344 | \r |
2ef2b01e A |
345 | //\r |
346 | // Disable interrupts\r | |
347 | //\r | |
348 | Cpu->GetInterruptState (Cpu, &Enabled);\r | |
349 | Cpu->DisableInterrupt (Cpu);\r | |
350 | \r | |
351 | //\r | |
352 | // Initialize the C entry points for interrupts\r | |
353 | //\r | |
354 | for (Index = 0; Index <= MAX_ARM_EXCEPTION; Index++) {\r | |
355 | Status = RegisterInterruptHandler (Index, NULL);\r | |
356 | ASSERT_EFI_ERROR (Status);\r | |
357 | \r | |
358 | Status = RegisterDebuggerInterruptHandler (Index, NULL);\r | |
359 | ASSERT_EFI_ERROR (Status);\r | |
360 | }\r | |
361 | \r | |
362 | //\r | |
8a4d81e6 | 363 | // Copy an implementation of the ARM exception vectors to PcdCpuVectorBaseAddress.\r |
2ef2b01e A |
364 | //\r |
365 | Length = (UINTN)ExceptionHandlersEnd - (UINTN)ExceptionHandlersStart;\r | |
366 | \r | |
367 | //\r | |
368 | // Reserve space for the exception handlers\r | |
369 | //\r | |
370 | Base = (EFI_PHYSICAL_ADDRESS)PcdGet32 (PcdCpuVectorBaseAddress);\r | |
371 | Status = gBS->AllocatePages (AllocateAddress, EfiBootServicesCode, EFI_SIZE_TO_PAGES (Length), &Base);\r | |
372 | // If the request was for memory that's not in the memory map (which is often the case for 0x00000000\r | |
373 | // on embedded systems, for example, we don't want to hang up. So we'll check here for a status of \r | |
374 | // EFI_NOT_FOUND, and continue in that case.\r | |
375 | if (EFI_ERROR(Status) && (Status != EFI_NOT_FOUND)) {\r | |
8a4d81e6 | 376 | ASSERT_EFI_ERROR (Status);\r |
2ef2b01e A |
377 | }\r |
378 | \r | |
379 | CopyMem ((VOID *)(UINTN)PcdGet32 (PcdCpuVectorBaseAddress), (VOID *)ExceptionHandlersStart, Length);\r | |
380 | \r | |
381 | //\r | |
382 | // Patch in the common Assembly exception handler\r | |
383 | //\r | |
384 | Offset = (UINTN)CommonExceptionEntry - (UINTN)ExceptionHandlersStart;\r | |
385 | *(UINTN *) ((UINT8 *)(UINTN)PcdGet32 (PcdCpuVectorBaseAddress) + Offset) = (UINTN)AsmCommonExceptionEntry;\r | |
386 | \r | |
387 | // Flush Caches since we updated executable stuff\r | |
8a4d81e6 | 388 | InvalidateInstructionCacheRange ((VOID *)PcdGet32(PcdCpuVectorBaseAddress), Length);\r |
2ef2b01e A |
389 | \r |
390 | if (Enabled) {\r | |
391 | // \r | |
392 | // Restore interrupt state\r | |
393 | //\r | |
394 | Status = Cpu->EnableInterrupt (Cpu);\r | |
395 | }\r | |
396 | \r | |
397 | return Status;\r | |
398 | }\r |