+++ /dev/null
-/** @file\r
- Default exception handler\r
-\r
- Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r
- Copyright (c) 2012, ARM Ltd. All rights reserved.<BR>\r
- \r
- This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
-**/\r
-\r
-#include <Uefi.h>\r
-#include <Library/BaseLib.h>\r
-#include <Library/DebugLib.h>\r
-#include <Library/PeCoffGetEntryPointLib.h>\r
-#include <Library/PrintLib.h>\r
-#include <Library/ArmDisassemblerLib.h>\r
-#include <Library/SerialPortLib.h>\r
-\r
-#include <Guid/DebugImageInfoTable.h>\r
-\r
-#include <Protocol/DebugSupport.h>\r
-#include <Library/DefaultExceptionHandlerLib.h>\r
-\r
-EFI_DEBUG_IMAGE_INFO_TABLE_HEADER *gDebugImageTableHeader = NULL;\r
-\r
-typedef struct {\r
- UINT32 BIT;\r
- CHAR8 Char;\r
-} CPSR_CHAR;\r
-\r
-CHAR8 *\r
-GetImageName (\r
- IN UINT32 FaultAddress,\r
- OUT UINT32 *ImageBase,\r
- OUT UINT32 *PeCoffSizeOfHeaders\r
- );\r
-\r
-/**\r
- Convert the Current Program Status Register (CPSR) to a string. The string is \r
- a defacto standard in the ARM world. \r
- \r
- It is possible to add extra bits by adding them to CpsrChar array.\r
-\r
- @param Cpsr ARM CPSR register value\r
- @param ReturnStr 32 byte string that contains string version of CPSR\r
-\r
-**/\r
-VOID\r
-CpsrString (\r
- IN UINT32 Cpsr,\r
- OUT CHAR8 *ReturnStr\r
- )\r
-{\r
- UINTN Index;\r
- CHAR8* Str;\r
- CHAR8* ModeStr;\r
- CPSR_CHAR CpsrChar[] = {\r
- { 31, 'n' },\r
- { 30, 'z' },\r
- { 29, 'c' },\r
- { 28, 'v' },\r
-\r
- { 9, 'e' },\r
- { 8, 'a' },\r
- { 7, 'i' },\r
- { 6, 'f' },\r
- { 5, 't' },\r
- { 0, '?' }\r
- };\r
- \r
- Str = ReturnStr;\r
-\r
- for (Index = 0; CpsrChar[Index].BIT != 0; Index++, Str++) {\r
- *Str = CpsrChar[Index].Char;\r
- if ((Cpsr & (1 << CpsrChar[Index].BIT)) != 0) {\r
- // Concert to upper case if bit is set\r
- *Str &= ~0x20;\r
- }\r
- }\r
- \r
- *Str++ = '_';\r
- *Str = '\0';\r
- \r
- switch (Cpsr & 0x1f) {\r
- case 0x10:\r
- ModeStr = "usr";\r
- break;\r
- case 0x011:\r
- ModeStr = "fiq";\r
- break;\r
- case 0x12:\r
- ModeStr = "irq";\r
- break;\r
- case 0x13:\r
- ModeStr = "svc";\r
- break;\r
- case 0x16:\r
- ModeStr = "mon";\r
- break;\r
- case 0x17:\r
- ModeStr = "abt";\r
- break;\r
- case 0x1b:\r
- ModeStr = "und";\r
- break;\r
- case 0x1f:\r
- ModeStr = "sys";\r
- break;\r
- \r
- default:\r
- ModeStr = "???";\r
- break;\r
- }\r
- \r
- AsciiStrCat (Str, ModeStr);\r
- return;\r
-} \r
-\r
-CHAR8 *\r
-FaultStatusToString (\r
- IN UINT32 Status\r
- )\r
-{\r
- CHAR8 *FaultSource;\r
-\r
- switch (Status) {\r
- case 0x01: FaultSource = "Alignment fault"; break;\r
- case 0x02: FaultSource = "Debug event fault"; break;\r
- case 0x03: FaultSource = "Access Flag fault on Section"; break;\r
- case 0x04: FaultSource = "Cache maintenance operation fault[2]"; break;\r
- case 0x05: FaultSource = "Translation fault on Section"; break;\r
- case 0x06: FaultSource = "Access Flag fault on Page"; break;\r
- case 0x07: FaultSource = "Translation fault on Page"; break;\r
- case 0x08: FaultSource = "Precise External Abort"; break;\r
- case 0x09: FaultSource = "Domain fault on Section"; break;\r
- case 0x0b: FaultSource = "Domain fault on Page"; break;\r
- case 0x0c: FaultSource = "External abort on translation, first level"; break;\r
- case 0x0d: FaultSource = "Permission fault on Section"; break;\r
- case 0x0e: FaultSource = "External abort on translation, second level"; break;\r
- case 0x0f: FaultSource = "Permission fault on Page"; break;\r
- case 0x16: FaultSource = "Imprecise External Abort"; break;\r
- default: FaultSource = "No function"; break;\r
- }\r
-\r
- return FaultSource;\r
-}\r
-\r
-STATIC CHAR8 *gExceptionTypeString[] = {\r
- "Reset",\r
- "Undefined OpCode",\r
- "SVC",\r
- "Prefetch Abort",\r
- "Data Abort",\r
- "Undefined",\r
- "IRQ",\r
- "FIQ"\r
-};\r
-\r
-/**\r
- This is the default action to take on an unexpected exception\r
- \r
- Since this is exception context don't do anything crazy like try to allcoate memory.\r
-\r
- @param ExceptionType Type of the exception\r
- @param SystemContext Register state at the time of the Exception\r
-\r
-\r
-**/\r
-VOID\r
-DefaultExceptionHandler (\r
- IN EFI_EXCEPTION_TYPE ExceptionType,\r
- IN OUT EFI_SYSTEM_CONTEXT SystemContext\r
- )\r
-{\r
- CHAR8 Buffer[100];\r
- UINTN CharCount;\r
- UINT32 DfsrStatus;\r
- UINT32 IfsrStatus;\r
- BOOLEAN DfsrWrite;\r
- UINT32 PcAdjust = 0;\r
-\r
- CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"\n%a Exception PC at 0x%08x CPSR 0x%08x ",\r
- gExceptionTypeString[ExceptionType], SystemContext.SystemContextArm->PC, SystemContext.SystemContextArm->CPSR);\r
- SerialPortWrite ((UINT8 *) Buffer, CharCount);\r
-\r
- DEBUG_CODE_BEGIN ();\r
- CHAR8 *Pdb;\r
- UINT32 ImageBase;\r
- UINT32 PeCoffSizeOfHeader;\r
- UINT32 Offset;\r
- CHAR8 CpsrStr[32]; // char per bit. Lower 5-bits are mode that is a 3 char string\r
- CHAR8 Buffer[80];\r
- UINT8 *DisAsm;\r
- UINT32 ItBlock;\r
- \r
- CpsrString (SystemContext.SystemContextArm->CPSR, CpsrStr);\r
- DEBUG ((EFI_D_ERROR, "%a\n", CpsrStr));\r
- \r
- Pdb = GetImageName (SystemContext.SystemContextArm->PC, &ImageBase, &PeCoffSizeOfHeader);\r
- Offset = SystemContext.SystemContextArm->PC - ImageBase;\r
- if (Pdb != NULL) {\r
- DEBUG ((EFI_D_ERROR, "%a\n", Pdb));\r
-\r
- //\r
- // A PE/COFF image loads its headers into memory so the headers are \r
- // included in the linked addresses. ELF and Mach-O images do not\r
- // include the headers so the first byte of the image is usually\r
- // text (code). If you look at link maps from ELF or Mach-O images\r
- // you need to subtract out the size of the PE/COFF header to get\r
- // get the offset that matches the link map. \r
- //\r
- DEBUG ((EFI_D_ERROR, "loaded at 0x%08x (PE/COFF offset) 0x%x (ELF or Mach-O offset) 0x%x", ImageBase, Offset, Offset - PeCoffSizeOfHeader));\r
- \r
- // If we come from an image it is safe to show the instruction. We know it should not fault\r
- DisAsm = (UINT8 *)(UINTN)SystemContext.SystemContextArm->PC;\r
- ItBlock = 0;\r
- DisassembleInstruction (&DisAsm, (SystemContext.SystemContextArm->CPSR & BIT5) == BIT5, TRUE, &ItBlock, Buffer, sizeof (Buffer));\r
- DEBUG ((EFI_D_ERROR, "\n%a", Buffer));\r
- \r
- switch (ExceptionType) {\r
- case EXCEPT_ARM_UNDEFINED_INSTRUCTION:\r
- case EXCEPT_ARM_SOFTWARE_INTERRUPT:\r
- case EXCEPT_ARM_PREFETCH_ABORT:\r
- case EXCEPT_ARM_DATA_ABORT:\r
- // advance PC past the faulting instruction\r
- PcAdjust = (UINTN)DisAsm - SystemContext.SystemContextArm->PC;\r
- break;\r
- \r
- default:\r
- break;\r
- }\r
-\r
- }\r
- DEBUG_CODE_END ();\r
- 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
- 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
- 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
- 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
- DEBUG ((EFI_D_ERROR, "DFSR 0x%08x DFAR 0x%08x IFSR 0x%08x IFAR 0x%08x\n", SystemContext.SystemContextArm->DFSR, SystemContext.SystemContextArm->DFAR, SystemContext.SystemContextArm->IFSR, SystemContext.SystemContextArm->IFAR));\r
-\r
- // Bit10 is Status[4] Bit3:0 is Status[3:0]\r
- DfsrStatus = (SystemContext.SystemContextArm->DFSR & 0xf) | ((SystemContext.SystemContextArm->DFSR >> 6) & 0x10);\r
- DfsrWrite = (SystemContext.SystemContextArm->DFSR & BIT11) != 0;\r
- if (DfsrStatus != 0x00) {\r
- DEBUG ((EFI_D_ERROR, " %a: %a 0x%08x\n", FaultStatusToString (DfsrStatus), DfsrWrite ? "write to" : "read from", SystemContext.SystemContextArm->DFAR));\r
- }\r
-\r
- IfsrStatus = (SystemContext.SystemContextArm->IFSR & 0xf) | ((SystemContext.SystemContextArm->IFSR >> 6) & 0x10);\r
- if (IfsrStatus != 0) {\r
- DEBUG ((EFI_D_ERROR, " Instruction %a at 0x%08x\n", FaultStatusToString (SystemContext.SystemContextArm->IFSR & 0xf), SystemContext.SystemContextArm->IFAR));\r
- }\r
-\r
- DEBUG ((EFI_D_ERROR, "\n"));\r
- ASSERT (FALSE);\r
- \r
- // Clear the error registers that we have already displayed incase some one wants to keep going\r
- SystemContext.SystemContextArm->DFSR = 0;\r
- SystemContext.SystemContextArm->IFSR = 0;\r
-\r
- // If some one is stepping past the exception handler adjust the PC to point to the next instruction \r
- SystemContext.SystemContextArm->PC += PcAdjust;\r
-}\r
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