/** @file\r
Default exception handler\r
\r
- Copyright (c) 2008-2010, Apple Inc. All rights reserved.\r
+ Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r
\r
- All rights reserved. This program and the accompanying materials\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
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/PeCoffGetEntryPointLib.h>\r
+#include <Library/ArmDisassemblerLib.h>\r
\r
#include <Guid/DebugImageInfoTable.h>\r
#include <Protocol/DebugSupport.h>\r
#include <Protocol/LoadedImage.h>\r
\r
\r
-VOID\r
-DisassembleArmInstruction (\r
- IN UINT32 *OpCodePtr,\r
- OUT CHAR8 *Buf,\r
- OUT UINTN Size\r
- );\r
-\r
-VOID\r
-DisassembleThumbInstruction (\r
- IN UINT16 *OpCodePtr,\r
- OUT CHAR8 *Buf,\r
- OUT UINTN Size\r
- );\r
-\r
-\r
EFI_DEBUG_IMAGE_INFO_TABLE_HEADER *gDebugImageTableHeader = NULL;\r
\r
\r
AsciiStrCat (Str, ModeStr);\r
return;\r
} \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
+\r
CHAR8 *gExceptionTypeString[] = {\r
"Reset",\r
"Undefined OpCode",\r
IN OUT EFI_SYSTEM_CONTEXT SystemContext\r
)\r
{\r
+ UINT32 DfsrStatus;\r
+ UINT32 IfsrStatus;\r
+ BOOLEAN DfsrWrite;\r
+ UINT32 PcAdjust = 0;\r
\r
DEBUG ((EFI_D_ERROR, "\n%a Exception PC at 0x%08x CPSR 0x%08x ", gExceptionTypeString[ExceptionType], SystemContext.SystemContextArm->PC, SystemContext.SystemContextArm->CPSR));\r
DEBUG_CODE_BEGIN ();\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
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
- if ((SystemContext.SystemContextArm->CPSR & 0x20) == 0) {\r
- // ARM\r
- DisassembleArmInstruction ((UINT32 *)(UINTN)SystemContext.SystemContextArm->PC, Buffer, sizeof (Buffer));\r
- DEBUG ((EFI_D_ERROR, "\n%a", Buffer));\r
- } else {\r
- // Thumb\r
- DEBUG ((EFI_D_ERROR, "\nFaulting Instruction 0x%04x", (UINT16 *)(UINTN)SystemContext.SystemContextArm->PC));\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\n", SystemContext.SystemContextArm->DFSR, SystemContext.SystemContextArm->DFAR, SystemContext.SystemContextArm->IFSR, SystemContext.SystemContextArm->IFAR));\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
\r
\r
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