[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
  SPDX-License-Identifier: BSD-2-Clause-Patent\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
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/UefiLib.h>\r
\r
#include <Guid/DebugImageInfoTable.h>\r
\r
#include <Protocol/DebugSupport.h>\r
#include <Library/DefaultExceptionHandlerLib.h>\r
\r
//\r
// The number of elements in a CHAR8 array, including the terminating NUL, that\r
// is meant to hold the string rendering of the CPSR.\r
//\r
#define CPSR_STRING_SIZE 32\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    CPSR_STRING_SIZE byte string that contains string\r
                       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
  //\r
  // See the interface contract in the leading comment block.\r
  //\r
  AsciiStrCatS (Str, CPSR_STRING_SIZE - (Str - ReturnStr), ModeStr);\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 allocate 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
  if (gST->ConOut != NULL) {\r
    AsciiPrint (Buffer);\r
  }\r
\r
  DEBUG_CODE_BEGIN ();\r
    CHAR8   *Pdb;\r
    UINT32  ImageBase;\r
    UINT32  PeCoffSizeOfHeader;\r
    UINT32  Offset;\r
    CHAR8   CpsrStr[CPSR_STRING_SIZE];  // char per bit. Lower 5-bits are mode\r
                                        // 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
  CpuDeadLoop ();   // may return if executing under a debugger\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	SPDX-License-Identifier: BSD-2-Clause-Patent\r
	8	\r
	9	**/\r
	10	\r
	11	#include <Uefi.h>\r
	12	#include <Library/BaseLib.h>\r
	13	#include <Library/DebugLib.h>\r
	14	#include <Library/PeCoffGetEntryPointLib.h>\r
	15	#include <Library/PrintLib.h>\r
	16	#include <Library/ArmDisassemblerLib.h>\r
	17	#include <Library/SerialPortLib.h>\r
	18	#include <Library/UefiBootServicesTableLib.h>\r
	19	#include <Library/UefiLib.h>\r
	20	\r
	21	#include <Guid/DebugImageInfoTable.h>\r
	22	\r
	23	#include <Protocol/DebugSupport.h>\r
	24	#include <Library/DefaultExceptionHandlerLib.h>\r
	25	\r
	26	//\r
	27	// The number of elements in a CHAR8 array, including the terminating NUL, that\r
	28	// is meant to hold the string rendering of the CPSR.\r
	29	//\r
	30	#define CPSR_STRING_SIZE 32\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 CPSR_STRING_SIZE byte string that contains string\r
	52	version of CPSR\r
	53	\r
	54	**/\r
	55	VOID\r
	56	CpsrString (\r
	57	IN UINT32 Cpsr,\r
	58	OUT CHAR8 *ReturnStr\r
	59	)\r
	60	{\r
	61	UINTN Index;\r
	62	CHAR8* Str;\r
	63	CHAR8* ModeStr;\r
	64	CPSR_CHAR CpsrChar[] = {\r
	65	{ 31, 'n' },\r
	66	{ 30, 'z' },\r
	67	{ 29, 'c' },\r
	68	{ 28, 'v' },\r
	69	\r
	70	{ 9, 'e' },\r
	71	{ 8, 'a' },\r
	72	{ 7, 'i' },\r
	73	{ 6, 'f' },\r
	74	{ 5, 't' },\r
	75	{ 0, '?' }\r
	76	};\r
	77	\r
	78	Str = ReturnStr;\r
	79	\r
	80	for (Index = 0; CpsrChar[Index].BIT != 0; Index++, Str++) {\r
	81	*Str = CpsrChar[Index].Char;\r
	82	if ((Cpsr & (1 << CpsrChar[Index].BIT)) != 0) {\r
	83	// Concert to upper case if bit is set\r
	84	*Str &= ~0x20;\r
	85	}\r
	86	}\r
	87	\r
	88	*Str++ = '_';\r
	89	*Str = '\0';\r
	90	\r
	91	switch (Cpsr & 0x1f) {\r
	92	case 0x10:\r
	93	ModeStr = "usr";\r
	94	break;\r
	95	case 0x011:\r
	96	ModeStr = "fiq";\r
	97	break;\r
	98	case 0x12:\r
	99	ModeStr = "irq";\r
	100	break;\r
	101	case 0x13:\r
	102	ModeStr = "svc";\r
	103	break;\r
	104	case 0x16:\r
	105	ModeStr = "mon";\r
	106	break;\r
	107	case 0x17:\r
	108	ModeStr = "abt";\r
	109	break;\r
	110	case 0x1b:\r
	111	ModeStr = "und";\r
	112	break;\r
	113	case 0x1f:\r
	114	ModeStr = "sys";\r
	115	break;\r
	116	\r
	117	default:\r
	118	ModeStr = "???";\r
	119	break;\r
	120	}\r
	121	\r
	122	//\r
	123	// See the interface contract in the leading comment block.\r
	124	//\r
	125	AsciiStrCatS (Str, CPSR_STRING_SIZE - (Str - ReturnStr), ModeStr);\r
	126	}\r
	127	\r
	128	CHAR8 *\r
	129	FaultStatusToString (\r
	130	IN UINT32 Status\r
	131	)\r
	132	{\r
	133	CHAR8 *FaultSource;\r
	134	\r
	135	switch (Status) {\r
	136	case 0x01: FaultSource = "Alignment fault"; break;\r
	137	case 0x02: FaultSource = "Debug event fault"; break;\r
	138	case 0x03: FaultSource = "Access Flag fault on Section"; break;\r
	139	case 0x04: FaultSource = "Cache maintenance operation fault[2]"; break;\r
	140	case 0x05: FaultSource = "Translation fault on Section"; break;\r
	141	case 0x06: FaultSource = "Access Flag fault on Page"; break;\r
	142	case 0x07: FaultSource = "Translation fault on Page"; break;\r
	143	case 0x08: FaultSource = "Precise External Abort"; break;\r
	144	case 0x09: FaultSource = "Domain fault on Section"; break;\r
	145	case 0x0b: FaultSource = "Domain fault on Page"; break;\r
	146	case 0x0c: FaultSource = "External abort on translation, first level"; break;\r
	147	case 0x0d: FaultSource = "Permission fault on Section"; break;\r
	148	case 0x0e: FaultSource = "External abort on translation, second level"; break;\r
	149	case 0x0f: FaultSource = "Permission fault on Page"; break;\r
	150	case 0x16: FaultSource = "Imprecise External Abort"; break;\r
	151	default: FaultSource = "No function"; break;\r
	152	}\r
	153	\r
	154	return FaultSource;\r
	155	}\r
	156	\r
	157	STATIC CHAR8 *gExceptionTypeString[] = {\r
	158	"Reset",\r
	159	"Undefined OpCode",\r
	160	"SVC",\r
	161	"Prefetch Abort",\r
	162	"Data Abort",\r
	163	"Undefined",\r
	164	"IRQ",\r
	165	"FIQ"\r
	166	};\r
	167	\r
	168	/**\r
	169	This is the default action to take on an unexpected exception\r
	170	\r
	171	Since this is exception context don't do anything crazy like try to allocate memory.\r
	172	\r
	173	@param ExceptionType Type of the exception\r
	174	@param SystemContext Register state at the time of the Exception\r
	175	\r
	176	\r
	177	**/\r
	178	VOID\r
	179	DefaultExceptionHandler (\r
	180	IN EFI_EXCEPTION_TYPE ExceptionType,\r
	181	IN OUT EFI_SYSTEM_CONTEXT SystemContext\r
	182	)\r
	183	{\r
	184	CHAR8 Buffer[100];\r
	185	UINTN CharCount;\r
	186	UINT32 DfsrStatus;\r
	187	UINT32 IfsrStatus;\r
	188	BOOLEAN DfsrWrite;\r
	189	UINT32 PcAdjust = 0;\r
	190	\r
	191	CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"\n%a Exception PC at 0x%08x CPSR 0x%08x ",\r
	192	gExceptionTypeString[ExceptionType], SystemContext.SystemContextArm->PC, SystemContext.SystemContextArm->CPSR);\r
	193	SerialPortWrite ((UINT8 *)Buffer, CharCount);\r
	194	if (gST->ConOut != NULL) {\r
	195	AsciiPrint (Buffer);\r
	196	}\r
	197	\r
	198	DEBUG_CODE_BEGIN ();\r
	199	CHAR8 *Pdb;\r
	200	UINT32 ImageBase;\r
	201	UINT32 PeCoffSizeOfHeader;\r
	202	UINT32 Offset;\r
	203	CHAR8 CpsrStr[CPSR_STRING_SIZE]; // char per bit. Lower 5-bits are mode\r
	204	// that is a 3 char string\r
	205	CHAR8 Buffer[80];\r
	206	UINT8 *DisAsm;\r
	207	UINT32 ItBlock;\r
	208	\r
	209	CpsrString (SystemContext.SystemContextArm->CPSR, CpsrStr);\r
	210	DEBUG ((EFI_D_ERROR, "%a\n", CpsrStr));\r
	211	\r
	212	Pdb = GetImageName (SystemContext.SystemContextArm->PC, &ImageBase, &PeCoffSizeOfHeader);\r
	213	Offset = SystemContext.SystemContextArm->PC - ImageBase;\r
	214	if (Pdb != NULL) {\r
	215	DEBUG ((EFI_D_ERROR, "%a\n", Pdb));\r
	216	\r
	217	//\r
	218	// A PE/COFF image loads its headers into memory so the headers are\r
	219	// included in the linked addresses. ELF and Mach-O images do not\r
	220	// include the headers so the first byte of the image is usually\r
	221	// text (code). If you look at link maps from ELF or Mach-O images\r
	222	// you need to subtract out the size of the PE/COFF header to get\r
	223	// get the offset that matches the link map.\r
	224	//\r
	225	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
	226	\r
	227	// If we come from an image it is safe to show the instruction. We know it should not fault\r
	228	DisAsm = (UINT8 *)(UINTN)SystemContext.SystemContextArm->PC;\r
	229	ItBlock = 0;\r
	230	DisassembleInstruction (&DisAsm, (SystemContext.SystemContextArm->CPSR & BIT5) == BIT5, TRUE, &ItBlock, Buffer, sizeof (Buffer));\r
	231	DEBUG ((EFI_D_ERROR, "\n%a", Buffer));\r
	232	\r
	233	switch (ExceptionType) {\r
	234	case EXCEPT_ARM_UNDEFINED_INSTRUCTION:\r
	235	case EXCEPT_ARM_SOFTWARE_INTERRUPT:\r
	236	case EXCEPT_ARM_PREFETCH_ABORT:\r
	237	case EXCEPT_ARM_DATA_ABORT:\r
	238	// advance PC past the faulting instruction\r
	239	PcAdjust = (UINTN)DisAsm - SystemContext.SystemContextArm->PC;\r
	240	break;\r
	241	\r
	242	default:\r
	243	break;\r
	244	}\r
	245	\r
	246	}\r
	247	DEBUG_CODE_END ();\r
	248	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
	249	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
	250	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
	251	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
	252	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
	253	\r
	254	// Bit10 is Status[4] Bit3:0 is Status[3:0]\r
	255	DfsrStatus = (SystemContext.SystemContextArm->DFSR & 0xf) \| ((SystemContext.SystemContextArm->DFSR >> 6) & 0x10);\r
	256	DfsrWrite = (SystemContext.SystemContextArm->DFSR & BIT11) != 0;\r
	257	if (DfsrStatus != 0x00) {\r
	258	DEBUG ((EFI_D_ERROR, " %a: %a 0x%08x\n", FaultStatusToString (DfsrStatus), DfsrWrite ? "write to" : "read from", SystemContext.SystemContextArm->DFAR));\r
	259	}\r
	260	\r
	261	IfsrStatus = (SystemContext.SystemContextArm->IFSR & 0xf) \| ((SystemContext.SystemContextArm->IFSR >> 6) & 0x10);\r
	262	if (IfsrStatus != 0) {\r
	263	DEBUG ((EFI_D_ERROR, " Instruction %a at 0x%08x\n", FaultStatusToString (SystemContext.SystemContextArm->IFSR & 0xf), SystemContext.SystemContextArm->IFAR));\r
	264	}\r
	265	\r
	266	DEBUG ((EFI_D_ERROR, "\n"));\r
	267	ASSERT (FALSE);\r
	268	\r
	269	CpuDeadLoop (); // may return if executing under a debugger\r
	270	\r
	271	// Clear the error registers that we have already displayed incase some one wants to keep going\r
	272	SystemContext.SystemContextArm->DFSR = 0;\r
	273	SystemContext.SystemContextArm->IFSR = 0;\r
	274	\r
	275	// If some one is stepping past the exception handler adjust the PC to point to the next instruction\r
	276	SystemContext.SystemContextArm->PC += PcAdjust;\r
	277	}\r