[mirror_edk2.git] / ArmPkg / Library / DefaultExceptionHandlerLib / Arm / DefaultExceptionHandler.c

/** @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  UINTN  FaultAddress,\r
  OUT UINTN  *ImageBase,\r
  OUT UINTN  *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
Commit	Line	Data
	1	/** @file\r
	2	Default exception handler\r
	3	\r
	4	Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r
	5	Copyright (c) 2012, ARM Ltd. All rights reserved.<BR>\r
	6	\r
	7	This program and the accompanying materials\r
	8	are licensed and made available under the terms and conditions of the BSD License\r
	9	which accompanies this distribution. The full text of the license may be found at\r
	10	http://opensource.org/licenses/bsd-license.php\r
	11	\r
	12	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	13	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	14	\r
	15	**/\r
	16	\r
	17	#include <Uefi.h>\r
	18	#include <Library/BaseLib.h>\r
	19	#include <Library/DebugLib.h>\r
	20	#include <Library/PeCoffGetEntryPointLib.h>\r
	21	#include <Library/PrintLib.h>\r
	22	#include <Library/ArmDisassemblerLib.h>\r
	23	#include <Library/SerialPortLib.h>\r
	24	\r
	25	#include <Guid/DebugImageInfoTable.h>\r
	26	\r
	27	#include <Protocol/DebugSupport.h>\r
	28	#include <Library/DefaultExceptionHandlerLib.h>\r
	29	\r
	30	EFI_DEBUG_IMAGE_INFO_TABLE_HEADER *gDebugImageTableHeader = NULL;\r
	31	\r
	32	typedef struct {\r
	33	UINT32 BIT;\r
	34	CHAR8 Char;\r
	35	} CPSR_CHAR;\r
	36	\r
	37	CHAR8 *\r
	38	GetImageName (\r
	39	IN UINTN FaultAddress,\r
	40	OUT UINTN *ImageBase,\r
	41	OUT UINTN *PeCoffSizeOfHeaders\r
	42	);\r
	43	\r
	44	/**\r
	45	Convert the Current Program Status Register (CPSR) to a string. The string is\r
	46	a defacto standard in the ARM world.\r
	47	\r
	48	It is possible to add extra bits by adding them to CpsrChar array.\r
	49	\r
	50	@param Cpsr ARM CPSR register value\r
	51	@param ReturnStr 32 byte string that contains string version of CPSR\r
	52	\r
	53	**/\r
	54	VOID\r
	55	CpsrString (\r
	56	IN UINT32 Cpsr,\r
	57	OUT CHAR8 *ReturnStr\r
	58	)\r
	59	{\r
	60	UINTN Index;\r
	61	CHAR8* Str;\r
	62	CHAR8* ModeStr;\r
	63	CPSR_CHAR CpsrChar[] = {\r
	64	{ 31, 'n' },\r
	65	{ 30, 'z' },\r
	66	{ 29, 'c' },\r
	67	{ 28, 'v' },\r
	68	\r
	69	{ 9, 'e' },\r
	70	{ 8, 'a' },\r
	71	{ 7, 'i' },\r
	72	{ 6, 'f' },\r
	73	{ 5, 't' },\r
	74	{ 0, '?' }\r
	75	};\r
	76	\r
	77	Str = ReturnStr;\r
	78	\r
	79	for (Index = 0; CpsrChar[Index].BIT != 0; Index++, Str++) {\r
	80	*Str = CpsrChar[Index].Char;\r
	81	if ((Cpsr & (1 << CpsrChar[Index].BIT)) != 0) {\r
	82	// Concert to upper case if bit is set\r
	83	*Str &= ~0x20;\r
	84	}\r
	85	}\r
	86	\r
	87	*Str++ = '_';\r
	88	*Str = '\0';\r
	89	\r
	90	switch (Cpsr & 0x1f) {\r
	91	case 0x10:\r
	92	ModeStr = "usr";\r
	93	break;\r
	94	case 0x011:\r
	95	ModeStr = "fiq";\r
	96	break;\r
	97	case 0x12:\r
	98	ModeStr = "irq";\r
	99	break;\r
	100	case 0x13:\r
	101	ModeStr = "svc";\r
	102	break;\r
	103	case 0x16:\r
	104	ModeStr = "mon";\r
	105	break;\r
	106	case 0x17:\r
	107	ModeStr = "abt";\r
	108	break;\r
	109	case 0x1b:\r
	110	ModeStr = "und";\r
	111	break;\r
	112	case 0x1f:\r
	113	ModeStr = "sys";\r
	114	break;\r
	115	\r
	116	default:\r
	117	ModeStr = "???";\r
	118	break;\r
	119	}\r
	120	\r
	121	AsciiStrCat (Str, ModeStr);\r
	122	return;\r
	123	}\r
	124	\r
	125	CHAR8 *\r
	126	FaultStatusToString (\r
	127	IN UINT32 Status\r
	128	)\r
	129	{\r
	130	CHAR8 *FaultSource;\r
	131	\r
	132	switch (Status) {\r
	133	case 0x01: FaultSource = "Alignment fault"; break;\r
	134	case 0x02: FaultSource = "Debug event fault"; break;\r
	135	case 0x03: FaultSource = "Access Flag fault on Section"; break;\r
	136	case 0x04: FaultSource = "Cache maintenance operation fault[2]"; break;\r
	137	case 0x05: FaultSource = "Translation fault on Section"; break;\r
	138	case 0x06: FaultSource = "Access Flag fault on Page"; break;\r
	139	case 0x07: FaultSource = "Translation fault on Page"; break;\r
	140	case 0x08: FaultSource = "Precise External Abort"; break;\r
	141	case 0x09: FaultSource = "Domain fault on Section"; break;\r
	142	case 0x0b: FaultSource = "Domain fault on Page"; break;\r
	143	case 0x0c: FaultSource = "External abort on translation, first level"; break;\r
	144	case 0x0d: FaultSource = "Permission fault on Section"; break;\r
	145	case 0x0e: FaultSource = "External abort on translation, second level"; break;\r
	146	case 0x0f: FaultSource = "Permission fault on Page"; break;\r
	147	case 0x16: FaultSource = "Imprecise External Abort"; break;\r
	148	default: FaultSource = "No function"; break;\r
	149	}\r
	150	\r
	151	return FaultSource;\r
	152	}\r
	153	\r
	154	STATIC CHAR8 *gExceptionTypeString[] = {\r
	155	"Reset",\r
	156	"Undefined OpCode",\r
	157	"SVC",\r
	158	"Prefetch Abort",\r
	159	"Data Abort",\r
	160	"Undefined",\r
	161	"IRQ",\r
	162	"FIQ"\r
	163	};\r
	164	\r
	165	/**\r
	166	This is the default action to take on an unexpected exception\r
	167	\r
	168	Since this is exception context don't do anything crazy like try to allcoate memory.\r
	169	\r
	170	@param ExceptionType Type of the exception\r
	171	@param SystemContext Register state at the time of the Exception\r
	172	\r
	173	\r
	174	**/\r
	175	VOID\r
	176	DefaultExceptionHandler (\r
	177	IN EFI_EXCEPTION_TYPE ExceptionType,\r
	178	IN OUT EFI_SYSTEM_CONTEXT SystemContext\r
	179	)\r
	180	{\r
	181	CHAR8 Buffer[100];\r
	182	UINTN CharCount;\r
	183	UINT32 DfsrStatus;\r
	184	UINT32 IfsrStatus;\r
	185	BOOLEAN DfsrWrite;\r
	186	UINT32 PcAdjust = 0;\r
	187	\r
	188	CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"\n%a Exception PC at 0x%08x CPSR 0x%08x ",\r
	189	gExceptionTypeString[ExceptionType], SystemContext.SystemContextArm->PC, SystemContext.SystemContextArm->CPSR);\r
	190	SerialPortWrite ((UINT8 *) Buffer, CharCount);\r
	191	\r
	192	DEBUG_CODE_BEGIN ();\r
	193	CHAR8 *Pdb;\r
	194	UINT32 ImageBase;\r
	195	UINT32 PeCoffSizeOfHeader;\r
	196	UINT32 Offset;\r
	197	CHAR8 CpsrStr[32]; // char per bit. Lower 5-bits are mode that is a 3 char string\r
	198	CHAR8 Buffer[80];\r
	199	UINT8 *DisAsm;\r
	200	UINT32 ItBlock;\r
	201	\r
	202	CpsrString (SystemContext.SystemContextArm->CPSR, CpsrStr);\r
	203	DEBUG ((EFI_D_ERROR, "%a\n", CpsrStr));\r
	204	\r
	205	Pdb = GetImageName (SystemContext.SystemContextArm->PC, &ImageBase, &PeCoffSizeOfHeader);\r
	206	Offset = SystemContext.SystemContextArm->PC - ImageBase;\r
	207	if (Pdb != NULL) {\r
	208	DEBUG ((EFI_D_ERROR, "%a\n", Pdb));\r
	209	\r
	210	//\r
	211	// A PE/COFF image loads its headers into memory so the headers are\r
	212	// included in the linked addresses. ELF and Mach-O images do not\r
	213	// include the headers so the first byte of the image is usually\r
	214	// text (code). If you look at link maps from ELF or Mach-O images\r
	215	// you need to subtract out the size of the PE/COFF header to get\r
	216	// get the offset that matches the link map.\r
	217	//\r
	218	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
	219	\r
	220	// If we come from an image it is safe to show the instruction. We know it should not fault\r
	221	DisAsm = (UINT8 *)(UINTN)SystemContext.SystemContextArm->PC;\r
	222	ItBlock = 0;\r
	223	DisassembleInstruction (&DisAsm, (SystemContext.SystemContextArm->CPSR & BIT5) == BIT5, TRUE, &ItBlock, Buffer, sizeof (Buffer));\r
	224	DEBUG ((EFI_D_ERROR, "\n%a", Buffer));\r
	225	\r
	226	switch (ExceptionType) {\r
	227	case EXCEPT_ARM_UNDEFINED_INSTRUCTION:\r
	228	case EXCEPT_ARM_SOFTWARE_INTERRUPT:\r
	229	case EXCEPT_ARM_PREFETCH_ABORT:\r
	230	case EXCEPT_ARM_DATA_ABORT:\r
	231	// advance PC past the faulting instruction\r
	232	PcAdjust = (UINTN)DisAsm - SystemContext.SystemContextArm->PC;\r
	233	break;\r
	234	\r
	235	default:\r
	236	break;\r
	237	}\r
	238	\r
	239	}\r
	240	DEBUG_CODE_END ();\r
	241	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
	242	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
	243	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
	244	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
	245	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
	246	\r
	247	// Bit10 is Status[4] Bit3:0 is Status[3:0]\r
	248	DfsrStatus = (SystemContext.SystemContextArm->DFSR & 0xf) \| ((SystemContext.SystemContextArm->DFSR >> 6) & 0x10);\r
	249	DfsrWrite = (SystemContext.SystemContextArm->DFSR & BIT11) != 0;\r
	250	if (DfsrStatus != 0x00) {\r
	251	DEBUG ((EFI_D_ERROR, " %a: %a 0x%08x\n", FaultStatusToString (DfsrStatus), DfsrWrite ? "write to" : "read from", SystemContext.SystemContextArm->DFAR));\r
	252	}\r
	253	\r
	254	IfsrStatus = (SystemContext.SystemContextArm->IFSR & 0xf) \| ((SystemContext.SystemContextArm->IFSR >> 6) & 0x10);\r
	255	if (IfsrStatus != 0) {\r
	256	DEBUG ((EFI_D_ERROR, " Instruction %a at 0x%08x\n", FaultStatusToString (SystemContext.SystemContextArm->IFSR & 0xf), SystemContext.SystemContextArm->IFAR));\r
	257	}\r
	258	\r
	259	DEBUG ((EFI_D_ERROR, "\n"));\r
	260	ASSERT (FALSE);\r
	261	\r
	262	// Clear the error registers that we have already displayed incase some one wants to keep going\r
	263	SystemContext.SystemContextArm->DFSR = 0;\r
	264	SystemContext.SystemContextArm->IFSR = 0;\r
	265	\r
	266	// If some one is stepping past the exception handler adjust the PC to point to the next instruction\r
	267	SystemContext.SystemContextArm->PC += PcAdjust;\r
	268	}\r