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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 |
62e797a4 A |
125 | UINT32\r |
126 | EFIAPI\r | |
127 | PeCoffGetSizeOfHeaders (\r | |
128 | IN VOID *Pe32Data\r | |
129 | )\r | |
130 | {\r | |
131 | EFI_IMAGE_DOS_HEADER *DosHdr;\r | |
132 | EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;\r | |
133 | UINTN SizeOfHeaders;\r | |
134 | \r | |
135 | DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data;\r | |
136 | if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {\r | |
137 | //\r | |
138 | // DOS image header is present, so read the PE header after the DOS image header.\r | |
139 | //\r | |
140 | Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));\r | |
141 | } else {\r | |
142 | //\r | |
143 | // DOS image header is not present, so PE header is at the image base.\r | |
144 | //\r | |
145 | Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;\r | |
146 | }\r | |
147 | \r | |
148 | if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {\r | |
149 | SizeOfHeaders = sizeof (EFI_TE_IMAGE_HEADER) + (UINTN)Hdr.Te->BaseOfCode - (UINTN)Hdr.Te->StrippedSize;\r | |
150 | } else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {\r | |
151 | SizeOfHeaders = Hdr.Pe32->OptionalHeader.SizeOfHeaders;\r | |
152 | } else {\r | |
153 | SizeOfHeaders = 0;\r | |
154 | }\r | |
155 | \r | |
156 | return SizeOfHeaders;\r | |
f659880b A |
157 | }\r |
158 | \r | |
159 | \r | |
160 | CHAR8 *\r | |
161 | GetImageName (\r | |
162 | IN UINT32 FaultAddress,\r | |
163 | OUT UINT32 *ImageBase,\r | |
164 | OUT UINT32 *PeCoffSizeOfHeaders\r | |
165 | )\r | |
166 | {\r | |
62e797a4 A |
167 | EFI_DEBUG_IMAGE_INFO *DebugTable;\r |
168 | UINTN Entry;\r | |
169 | CHAR8 *Address;\r | |
170 | \r | |
f659880b A |
171 | \r |
172 | DebugTable = gDebugImageTableHeader->EfiDebugImageInfoTable;\r | |
173 | if (DebugTable == NULL) {\r | |
174 | return NULL;\r | |
175 | }\r | |
176 | \r | |
177 | Address = (CHAR8 *)(UINTN)FaultAddress;\r | |
62e797a4 A |
178 | for (Entry = 0; Entry < gDebugImageTableHeader->TableSize; Entry++, DebugTable++) {\r |
179 | if (DebugTable->NormalImage != NULL) {\r | |
180 | if ((DebugTable->NormalImage->ImageInfoType == EFI_DEBUG_IMAGE_INFO_TYPE_NORMAL) && \r | |
181 | (DebugTable->NormalImage->LoadedImageProtocolInstance != NULL)) {\r | |
182 | if ((Address >= (CHAR8 *)DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase) &&\r | |
183 | (Address <= ((CHAR8 *)DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase + DebugTable->NormalImage->LoadedImageProtocolInstance->ImageSize))) {\r | |
184 | *ImageBase = (UINT32)DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase;\r | |
185 | *PeCoffSizeOfHeaders = PeCoffGetSizeOfHeaders ((VOID *)(UINTN)*ImageBase);\r | |
186 | return PeCoffLoaderGetPdbPointer (DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase);\r | |
187 | } \r | |
188 | }\r | |
189 | } \r | |
f659880b A |
190 | }\r |
191 | \r | |
192 | return NULL;\r | |
193 | }\r | |
194 | \r | |
195 | \r | |
8a4d81e6 A |
196 | CHAR8 *gExceptionTypeString[] = {\r |
197 | "Reset",\r | |
198 | "Undefined Instruction",\r | |
199 | "SWI",\r | |
200 | "Prefetch Abort",\r | |
201 | "Data Abort",\r | |
202 | "Undefined",\r | |
203 | "IRQ",\r | |
204 | "FIQ"\r | |
205 | };\r | |
2ef2b01e A |
206 | \r |
207 | VOID\r | |
208 | EFIAPI\r | |
209 | CommonCExceptionHandler (\r | |
210 | IN EFI_EXCEPTION_TYPE ExceptionType,\r | |
211 | IN OUT EFI_SYSTEM_CONTEXT SystemContext\r | |
212 | )\r | |
213 | {\r | |
214 | BOOLEAN Dispatched = FALSE;\r | |
8a4d81e6 | 215 | \r |
d213712d | 216 | \r |
2ef2b01e A |
217 | if (ExceptionType <= MAX_ARM_EXCEPTION) {\r |
218 | if (gDebuggerExceptionHandlers[ExceptionType]) {\r | |
219 | //\r | |
220 | // If DebugSupport hooked the interrupt call the handler. This does not disable \r | |
221 | // the normal handler.\r | |
222 | //\r | |
223 | gDebuggerExceptionHandlers[ExceptionType] (ExceptionType, SystemContext);\r | |
224 | Dispatched = TRUE;\r | |
225 | }\r | |
226 | if (gExceptionHandlers[ExceptionType]) {\r | |
227 | gExceptionHandlers[ExceptionType] (ExceptionType, SystemContext);\r | |
228 | Dispatched = TRUE;\r | |
229 | }\r | |
8a4d81e6 A |
230 | } else {\r |
231 | DEBUG ((EFI_D_ERROR, "Unknown exception type %d from %08x\n", ExceptionType, SystemContext.SystemContextArm->PC));\r | |
232 | ASSERT (FALSE);\r | |
2ef2b01e A |
233 | }\r |
234 | \r | |
235 | if (Dispatched) {\r | |
236 | //\r | |
237 | // We did work so this was an expected ExceptionType\r | |
238 | //\r | |
239 | return;\r | |
240 | }\r | |
241 | \r | |
242 | if (ExceptionType == EXCEPT_ARM_SOFTWARE_INTERRUPT) {\r | |
243 | //\r | |
244 | // ARM JTAG debuggers some times use this vector, so it is not an error to get one\r | |
245 | //\r | |
246 | return;\r | |
247 | }\r | |
248 | \r | |
249 | //\r | |
f659880b | 250 | // Code after here is the default exception handler... Dump the context\r |
2ef2b01e | 251 | //\r |
f659880b A |
252 | DEBUG ((EFI_D_ERROR, "\n%a Exception from instruction at 0x%08x CPSR 0x%08x\n", gExceptionTypeString[ExceptionType], SystemContext.SystemContextArm->PC, SystemContext.SystemContextArm->CPSR));\r |
253 | DEBUG_CODE_BEGIN ();\r | |
62e797a4 A |
254 | CHAR8 *Pdb;\r |
255 | UINT32 ImageBase;\r | |
256 | UINT32 PeCoffSizeOfHeader;\r | |
257 | UINT32 Offset;\r | |
f659880b A |
258 | \r |
259 | Pdb = GetImageName (SystemContext.SystemContextArm->PC, &ImageBase, &PeCoffSizeOfHeader);\r | |
260 | Offset = SystemContext.SystemContextArm->PC - ImageBase;\r | |
261 | if (Pdb != NULL) {\r | |
262 | DEBUG ((EFI_D_ERROR, "%a\n", Pdb));\r | |
2ef2b01e | 263 | \r |
f659880b A |
264 | //\r |
265 | // A PE/COFF image loads its headers into memory so the headers are \r | |
266 | // included in the linked addressess. ELF and Mach-O images do not\r | |
267 | // include the headers so the first byte of the image is usually\r | |
268 | // text (code). If you look at link maps from ELF or Mach-O images\r | |
269 | // you need to subtact out the size of the PE/COFF header to get\r | |
270 | // get the offset that matches the link map. \r | |
271 | //\r | |
272 | DEBUG ((EFI_D_ERROR, "loadded at 0x%08x (PE/COFF offset) 0x%08x (ELF or Mach-O offset) 0x%08x\n", ImageBase, Offset, Offset - PeCoffSizeOfHeader));\r | |
273 | }\r | |
274 | DEBUG_CODE_END ();\r | |
275 | DEBUG ((EFI_D_ERROR, " 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 | |
276 | 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 | |
277 | 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 | |
278 | 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 | |
279 | 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 | |
280 | \r | |
281 | ASSERT (FALSE);\r | |
282 | // while (TRUE) {\r | |
283 | // CpuSleep ();\r | |
284 | // }\r | |
2ef2b01e A |
285 | }\r |
286 | \r | |
287 | \r | |
288 | \r | |
289 | EFI_STATUS\r | |
290 | InitializeExceptions (\r | |
291 | IN EFI_CPU_ARCH_PROTOCOL *Cpu\r | |
292 | )\r | |
293 | {\r | |
294 | EFI_STATUS Status;\r | |
295 | UINTN Offset;\r | |
296 | UINTN Length;\r | |
297 | UINTN Index;\r | |
298 | BOOLEAN Enabled;\r | |
299 | EFI_PHYSICAL_ADDRESS Base;\r | |
300 | \r | |
62e797a4 A |
301 | Status = EfiGetSystemConfigurationTable (&gEfiDebugImageInfoTableGuid, (VOID **)&gDebugImageTableHeader);\r |
302 | if (EFI_ERROR (Status)) {\r | |
303 | gDebugImageTableHeader = NULL;\r | |
304 | }\r | |
f659880b | 305 | \r |
2ef2b01e A |
306 | //\r |
307 | // Disable interrupts\r | |
308 | //\r | |
309 | Cpu->GetInterruptState (Cpu, &Enabled);\r | |
310 | Cpu->DisableInterrupt (Cpu);\r | |
311 | \r | |
312 | //\r | |
313 | // Initialize the C entry points for interrupts\r | |
314 | //\r | |
315 | for (Index = 0; Index <= MAX_ARM_EXCEPTION; Index++) {\r | |
316 | Status = RegisterInterruptHandler (Index, NULL);\r | |
317 | ASSERT_EFI_ERROR (Status);\r | |
318 | \r | |
319 | Status = RegisterDebuggerInterruptHandler (Index, NULL);\r | |
320 | ASSERT_EFI_ERROR (Status);\r | |
321 | }\r | |
322 | \r | |
323 | //\r | |
8a4d81e6 | 324 | // Copy an implementation of the ARM exception vectors to PcdCpuVectorBaseAddress.\r |
2ef2b01e A |
325 | //\r |
326 | Length = (UINTN)ExceptionHandlersEnd - (UINTN)ExceptionHandlersStart;\r | |
327 | \r | |
328 | //\r | |
329 | // Reserve space for the exception handlers\r | |
330 | //\r | |
331 | Base = (EFI_PHYSICAL_ADDRESS)PcdGet32 (PcdCpuVectorBaseAddress);\r | |
332 | Status = gBS->AllocatePages (AllocateAddress, EfiBootServicesCode, EFI_SIZE_TO_PAGES (Length), &Base);\r | |
333 | // If the request was for memory that's not in the memory map (which is often the case for 0x00000000\r | |
334 | // on embedded systems, for example, we don't want to hang up. So we'll check here for a status of \r | |
335 | // EFI_NOT_FOUND, and continue in that case.\r | |
336 | if (EFI_ERROR(Status) && (Status != EFI_NOT_FOUND)) {\r | |
8a4d81e6 | 337 | ASSERT_EFI_ERROR (Status);\r |
2ef2b01e A |
338 | }\r |
339 | \r | |
340 | CopyMem ((VOID *)(UINTN)PcdGet32 (PcdCpuVectorBaseAddress), (VOID *)ExceptionHandlersStart, Length);\r | |
341 | \r | |
342 | //\r | |
343 | // Patch in the common Assembly exception handler\r | |
344 | //\r | |
345 | Offset = (UINTN)CommonExceptionEntry - (UINTN)ExceptionHandlersStart;\r | |
346 | *(UINTN *) ((UINT8 *)(UINTN)PcdGet32 (PcdCpuVectorBaseAddress) + Offset) = (UINTN)AsmCommonExceptionEntry;\r | |
347 | \r | |
348 | // Flush Caches since we updated executable stuff\r | |
8a4d81e6 | 349 | InvalidateInstructionCacheRange ((VOID *)PcdGet32(PcdCpuVectorBaseAddress), Length);\r |
2ef2b01e A |
350 | \r |
351 | if (Enabled) {\r | |
352 | // \r | |
353 | // Restore interrupt state\r | |
354 | //\r | |
355 | Status = Cpu->EnableInterrupt (Cpu);\r | |
356 | }\r | |
357 | \r | |
358 | return Status;\r | |
359 | }\r |