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      1 /** @file
      2   Default exception handler
      3 
      4   Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
      5   Copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>
      6 
      7   This program and the accompanying materials
      8   are licensed and made available under the terms and conditions of the BSD License
      9   which accompanies this distribution.  The full text of the license may be found at
     10   http://opensource.org/licenses/bsd-license.php
     11 
     12   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
     13   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
     14 
     15 **/
     16 
     17 #include <Uefi.h>
     18 #include <Library/UefiLib.h>
     19 #include <Library/BaseLib.h>
     20 #include <Library/DebugLib.h>
     21 #include <Library/PeCoffGetEntryPointLib.h>
     22 #include <Library/PrintLib.h>
     23 #include <Library/ArmDisassemblerLib.h>
     24 #include <Library/SerialPortLib.h>
     25 
     26 #include <Guid/DebugImageInfoTable.h>
     27 #include <Protocol/DebugSupport.h>
     28 #include <Protocol/LoadedImage.h>
     29 
     30 EFI_DEBUG_IMAGE_INFO_TABLE_HEADER *gDebugImageTableHeader = NULL;
     31 
     32 STATIC CHAR8 *gExceptionTypeString[] = {
     33   "Synchronous",
     34   "IRQ",
     35   "FIQ",
     36   "SError"
     37 };
     38 
     39 CHAR8 *
     40 GetImageName (
     41   IN  UINTN  FaultAddress,
     42   OUT UINTN  *ImageBase,
     43   OUT UINTN  *PeCoffSizeOfHeaders
     44   );
     45 
     46 STATIC
     47 VOID
     48 DescribeInstructionOrDataAbort (
     49   IN CHAR8 *AbortType,
     50   IN UINTN Iss
     51   )
     52 {
     53   CHAR8 *AbortCause;
     54 
     55   switch (Iss & 0x3f) {
     56     case 0x0: AbortCause = "Address size fault, zeroth level of translation or translation table base register";  break;
     57     case 0x1: AbortCause = "Address size fault, first level";  break;
     58     case 0x2: AbortCause = "Address size fault, second level";  break;
     59     case 0x3: AbortCause = "Address size fault, third level";  break;
     60     case 0x4: AbortCause = "Translation fault, zeroth level";  break;
     61     case 0x5: AbortCause = "Translation fault, first level";  break;
     62     case 0x6: AbortCause = "Translation fault, second level";  break;
     63     case 0x7: AbortCause = "Translation fault, third level";  break;
     64     case 0x9: AbortCause = "Access flag fault, first level";  break;
     65     case 0xa: AbortCause = "Access flag fault, second level";  break;
     66     case 0xb: AbortCause = "Access flag fault, third level";  break;
     67     case 0xd: AbortCause = "Permission fault, first level";  break;
     68     case 0xe: AbortCause = "Permission fault, second level";  break;
     69     case 0xf: AbortCause = "Permission fault, third level";  break;
     70     case 0x10: AbortCause = "Synchronous external abort";  break;
     71     case 0x18: AbortCause = "Synchronous parity error on memory access";  break;
     72     case 0x11: AbortCause = "Asynchronous external abort";  break;
     73     case 0x19: AbortCause = "Asynchronous parity error on memory access";  break;
     74     case 0x14: AbortCause = "Synchronous external abort on translation table walk, zeroth level";  break;
     75     case 0x15: AbortCause = "Synchronous external abort on translation table walk, first level";  break;
     76     case 0x16: AbortCause = "Synchronous external abort on translation table walk, second level";  break;
     77     case 0x17: AbortCause = "Synchronous external abort on translation table walk, third level";  break;
     78     case 0x1c: AbortCause = "Synchronous parity error on memory access on translation table walk, zeroth level";  break;
     79     case 0x1d: AbortCause = "Synchronous parity error on memory access on translation table walk, first level";  break;
     80     case 0x1e: AbortCause = "Synchronous parity error on memory access on translation table walk, second level";  break;
     81     case 0x1f: AbortCause = "Synchronous parity error on memory access on translation table walk, third level";  break;
     82     case 0x21: AbortCause = "Alignment fault";  break;
     83     case 0x22: AbortCause = "Debug event";  break;
     84     case 0x30: AbortCause = "TLB conflict abort";  break;
     85     case 0x33:
     86     case 0x34: AbortCause = "IMPLEMENTATION DEFINED";  break;
     87     case 0x35:
     88     case 0x36: AbortCause = "Domain fault"; break;
     89     default: AbortCause = ""; break;
     90   }
     91 
     92   DEBUG ((EFI_D_ERROR, "\n%a: %a\n", AbortType, AbortCause));
     93 }
     94 
     95 STATIC
     96 VOID
     97 DescribeExceptionSyndrome (
     98   IN UINT32 Esr
     99   )
    100 {
    101   CHAR8 *Message;
    102   UINTN Ec;
    103   UINTN Iss;
    104 
    105   Ec = Esr >> 26;
    106   Iss = Esr & 0x00ffffff;
    107 
    108   switch (Ec) {
    109     case 0x15: Message = "SVC executed in AArch64"; break;
    110     case 0x20:
    111     case 0x21: DescribeInstructionOrDataAbort ("Instruction abort", Iss); return;
    112     case 0x22: Message = "PC alignment fault"; break;
    113     case 0x23: Message = "SP alignment fault"; break;
    114     case 0x24:
    115     case 0x25: DescribeInstructionOrDataAbort ("Data abort", Iss); return;
    116     default: return;
    117   }
    118 
    119   DEBUG ((EFI_D_ERROR, "\n %a \n", Message));
    120 }
    121 
    122 /**
    123   This is the default action to take on an unexpected exception
    124 
    125   Since this is exception context don't do anything crazy like try to allcoate memory.
    126 
    127   @param  ExceptionType    Type of the exception
    128   @param  SystemContext    Register state at the time of the Exception
    129 
    130 **/
    131 VOID
    132 DefaultExceptionHandler (
    133   IN     EFI_EXCEPTION_TYPE           ExceptionType,
    134   IN OUT EFI_SYSTEM_CONTEXT           SystemContext
    135   )
    136 {
    137   CHAR8  Buffer[100];
    138   UINTN  CharCount;
    139 
    140   CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"\n\n%a Exception at 0x%016lx\n", gExceptionTypeString[ExceptionType], SystemContext.SystemContextAArch64->ELR);
    141   SerialPortWrite ((UINT8 *) Buffer, CharCount);
    142 
    143   DEBUG_CODE_BEGIN ();
    144     CHAR8  *Pdb;
    145     UINTN  ImageBase;
    146     UINTN  PeCoffSizeOfHeader;
    147     Pdb = GetImageName (SystemContext.SystemContextAArch64->ELR, &ImageBase, &PeCoffSizeOfHeader);
    148     if (Pdb != NULL) {
    149       DEBUG ((EFI_D_ERROR, "%a loaded at 0x%016lx \n", Pdb, ImageBase));
    150     }
    151   DEBUG_CODE_END ();
    152 
    153   DEBUG ((EFI_D_ERROR, "\n  X0 0x%016lx   X1 0x%016lx   X2 0x%016lx   X3 0x%016lx\n", SystemContext.SystemContextAArch64->X0, SystemContext.SystemContextAArch64->X1, SystemContext.SystemContextAArch64->X2, SystemContext.SystemContextAArch64->X3));
    154   DEBUG ((EFI_D_ERROR, "  X4 0x%016lx   X5 0x%016lx   X6 0x%016lx   X7 0x%016lx\n", SystemContext.SystemContextAArch64->X4, SystemContext.SystemContextAArch64->X5, SystemContext.SystemContextAArch64->X6, SystemContext.SystemContextAArch64->X7));
    155   DEBUG ((EFI_D_ERROR, "  X8 0x%016lx   X9 0x%016lx  X10 0x%016lx  X11 0x%016lx\n", SystemContext.SystemContextAArch64->X8, SystemContext.SystemContextAArch64->X9, SystemContext.SystemContextAArch64->X10, SystemContext.SystemContextAArch64->X11));
    156   DEBUG ((EFI_D_ERROR, " X12 0x%016lx  X13 0x%016lx  X14 0x%016lx  X15 0x%016lx\n", SystemContext.SystemContextAArch64->X12, SystemContext.SystemContextAArch64->X13, SystemContext.SystemContextAArch64->X14, SystemContext.SystemContextAArch64->X15));
    157   DEBUG ((EFI_D_ERROR, " X16 0x%016lx  X17 0x%016lx  X18 0x%016lx  X19 0x%016lx\n", SystemContext.SystemContextAArch64->X16, SystemContext.SystemContextAArch64->X17, SystemContext.SystemContextAArch64->X18, SystemContext.SystemContextAArch64->X19));
    158   DEBUG ((EFI_D_ERROR, " X20 0x%016lx  X21 0x%016lx  X22 0x%016lx  X23 0x%016lx\n", SystemContext.SystemContextAArch64->X20, SystemContext.SystemContextAArch64->X21, SystemContext.SystemContextAArch64->X22, SystemContext.SystemContextAArch64->X23));
    159   DEBUG ((EFI_D_ERROR, " X24 0x%016lx  X25 0x%016lx  X26 0x%016lx  X27 0x%016lx\n", SystemContext.SystemContextAArch64->X24, SystemContext.SystemContextAArch64->X25, SystemContext.SystemContextAArch64->X26, SystemContext.SystemContextAArch64->X27));
    160   DEBUG ((EFI_D_ERROR, " X28 0x%016lx   FP 0x%016lx   LR 0x%016lx  \n", SystemContext.SystemContextAArch64->X28, SystemContext.SystemContextAArch64->FP, SystemContext.SystemContextAArch64->LR));
    161 
    162   /* We save these as 128bit numbers, but have to print them as two 64bit numbers,
    163      so swap the 64bit words to correctly represent a 128bit number.  */
    164   DEBUG ((EFI_D_ERROR, "\n  V0 0x%016lx %016lx   V1 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V0[1], SystemContext.SystemContextAArch64->V0[0], SystemContext.SystemContextAArch64->V1[1], SystemContext.SystemContextAArch64->V1[0]));
    165   DEBUG ((EFI_D_ERROR, "  V2 0x%016lx %016lx   V3 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V2[1], SystemContext.SystemContextAArch64->V2[0], SystemContext.SystemContextAArch64->V3[1], SystemContext.SystemContextAArch64->V3[0]));
    166   DEBUG ((EFI_D_ERROR, "  V4 0x%016lx %016lx   V5 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V4[1], SystemContext.SystemContextAArch64->V4[0], SystemContext.SystemContextAArch64->V5[1], SystemContext.SystemContextAArch64->V5[0]));
    167   DEBUG ((EFI_D_ERROR, "  V6 0x%016lx %016lx   V7 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V6[1], SystemContext.SystemContextAArch64->V6[0], SystemContext.SystemContextAArch64->V7[1], SystemContext.SystemContextAArch64->V7[0]));
    168   DEBUG ((EFI_D_ERROR, "  V8 0x%016lx %016lx   V9 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V8[1], SystemContext.SystemContextAArch64->V8[0], SystemContext.SystemContextAArch64->V9[1], SystemContext.SystemContextAArch64->V9[0]));
    169   DEBUG ((EFI_D_ERROR, " V10 0x%016lx %016lx  V11 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V10[1], SystemContext.SystemContextAArch64->V10[0], SystemContext.SystemContextAArch64->V11[1], SystemContext.SystemContextAArch64->V11[0]));
    170   DEBUG ((EFI_D_ERROR, " V12 0x%016lx %016lx  V13 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V12[1], SystemContext.SystemContextAArch64->V12[0], SystemContext.SystemContextAArch64->V13[1], SystemContext.SystemContextAArch64->V13[0]));
    171   DEBUG ((EFI_D_ERROR, " V14 0x%016lx %016lx  V15 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V14[1], SystemContext.SystemContextAArch64->V14[0], SystemContext.SystemContextAArch64->V15[1], SystemContext.SystemContextAArch64->V15[0]));
    172   DEBUG ((EFI_D_ERROR, " V16 0x%016lx %016lx  V17 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V16[1], SystemContext.SystemContextAArch64->V16[0], SystemContext.SystemContextAArch64->V17[1], SystemContext.SystemContextAArch64->V17[0]));
    173   DEBUG ((EFI_D_ERROR, " V18 0x%016lx %016lx  V19 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V18[1], SystemContext.SystemContextAArch64->V18[0], SystemContext.SystemContextAArch64->V19[1], SystemContext.SystemContextAArch64->V19[0]));
    174   DEBUG ((EFI_D_ERROR, " V20 0x%016lx %016lx  V21 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V20[1], SystemContext.SystemContextAArch64->V20[0], SystemContext.SystemContextAArch64->V21[1], SystemContext.SystemContextAArch64->V21[0]));
    175   DEBUG ((EFI_D_ERROR, " V22 0x%016lx %016lx  V23 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V22[1], SystemContext.SystemContextAArch64->V22[0], SystemContext.SystemContextAArch64->V23[1], SystemContext.SystemContextAArch64->V23[0]));
    176   DEBUG ((EFI_D_ERROR, " V24 0x%016lx %016lx  V25 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V24[1], SystemContext.SystemContextAArch64->V24[0], SystemContext.SystemContextAArch64->V25[1], SystemContext.SystemContextAArch64->V25[0]));
    177   DEBUG ((EFI_D_ERROR, " V26 0x%016lx %016lx  V27 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V26[1], SystemContext.SystemContextAArch64->V26[0], SystemContext.SystemContextAArch64->V27[1], SystemContext.SystemContextAArch64->V27[0]));
    178   DEBUG ((EFI_D_ERROR, " V28 0x%016lx %016lx  V29 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V28[1], SystemContext.SystemContextAArch64->V28[0], SystemContext.SystemContextAArch64->V29[1], SystemContext.SystemContextAArch64->V29[0]));
    179   DEBUG ((EFI_D_ERROR, " V30 0x%016lx %016lx  V31 0x%016lx %016lx\n", SystemContext.SystemContextAArch64->V30[1], SystemContext.SystemContextAArch64->V30[0], SystemContext.SystemContextAArch64->V31[1], SystemContext.SystemContextAArch64->V31[0]));
    180 
    181   DEBUG ((EFI_D_ERROR, "\n  SP 0x%016lx  ELR 0x%016lx  SPSR 0x%08lx  FPSR 0x%08lx\n ESR 0x%08lx          FAR 0x%016lx\n", SystemContext.SystemContextAArch64->SP, SystemContext.SystemContextAArch64->ELR, SystemContext.SystemContextAArch64->SPSR, SystemContext.SystemContextAArch64->FPSR, SystemContext.SystemContextAArch64->ESR, SystemContext.SystemContextAArch64->FAR));
    182 
    183   DEBUG ((EFI_D_ERROR, "\n ESR : EC 0x%02x  IL 0x%x  ISS 0x%08x\n", (SystemContext.SystemContextAArch64->ESR & 0xFC000000) >> 26, (SystemContext.SystemContextAArch64->ESR >> 25) & 0x1, SystemContext.SystemContextAArch64->ESR & 0x1FFFFFF ));
    184 
    185   DescribeExceptionSyndrome (SystemContext.SystemContextAArch64->ESR);
    186   ASSERT (FALSE);
    187 }
    188