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