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 STATIC CHAR8 *gExceptionTypeString[] = { 31 "Synchronous", 32 "IRQ", 33 "FIQ", 34 "SError" 35 }; 36 37 STATIC BOOLEAN mRecursiveException; 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 #ifndef MDEPKG_NDEBUG 123 STATIC 124 CONST CHAR8 * 125 BaseName ( 126 IN CONST CHAR8 *FullName 127 ) 128 { 129 CONST CHAR8 *Str; 130 131 Str = FullName + AsciiStrLen (FullName); 132 133 while (--Str > FullName) { 134 if (*Str == '/' || *Str == '\\') { 135 return Str + 1; 136 } 137 } 138 return Str; 139 } 140 #endif 141 142 /** 143 This is the default action to take on an unexpected exception 144 145 Since this is exception context don't do anything crazy like try to allcoate memory. 146 147 @param ExceptionType Type of the exception 148 @param SystemContext Register state at the time of the Exception 149 150 **/ 151 VOID 152 DefaultExceptionHandler ( 153 IN EFI_EXCEPTION_TYPE ExceptionType, 154 IN OUT EFI_SYSTEM_CONTEXT SystemContext 155 ) 156 { 157 CHAR8 Buffer[100]; 158 UINTN CharCount; 159 INT32 Offset; 160 161 if (mRecursiveException) { 162 CharCount = AsciiSPrint (Buffer, sizeof (Buffer),"\nRecursive exception occurred while dumping the CPU state\n"); 163 SerialPortWrite ((UINT8 *) Buffer, CharCount); 164 CpuDeadLoop (); 165 } 166 mRecursiveException = TRUE; 167 168 CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"\n\n%a Exception at 0x%016lx\n", gExceptionTypeString[ExceptionType], SystemContext.SystemContextAArch64->ELR); 169 SerialPortWrite ((UINT8 *) Buffer, CharCount); 170 171 DEBUG_CODE_BEGIN (); 172 CHAR8 *Pdb, *PrevPdb; 173 UINTN ImageBase; 174 UINTN PeCoffSizeOfHeader; 175 UINT64 *Fp; 176 UINT64 RootFp[2]; 177 UINTN Idx; 178 179 PrevPdb = Pdb = GetImageName (SystemContext.SystemContextAArch64->ELR, &ImageBase, &PeCoffSizeOfHeader); 180 if (Pdb != NULL) { 181 DEBUG ((EFI_D_ERROR, "PC 0x%012lx (0x%012lx+0x%08x) [ 0] %a\n", 182 SystemContext.SystemContextAArch64->ELR, ImageBase, 183 SystemContext.SystemContextAArch64->ELR - ImageBase, BaseName (Pdb))); 184 185 if ((UINT64 *)SystemContext.SystemContextAArch64->FP != 0) { 186 Idx = 0; 187 188 RootFp[0] = ((UINT64 *)SystemContext.SystemContextAArch64->FP)[0]; 189 RootFp[1] = ((UINT64 *)SystemContext.SystemContextAArch64->FP)[1]; 190 if (RootFp[1] != SystemContext.SystemContextAArch64->LR) { 191 RootFp[0] = SystemContext.SystemContextAArch64->FP; 192 RootFp[1] = SystemContext.SystemContextAArch64->LR; 193 } 194 for (Fp = RootFp; Fp[0] != 0; Fp = (UINT64 *)Fp[0]) { 195 Pdb = GetImageName (Fp[1], &ImageBase, &PeCoffSizeOfHeader); 196 if (Pdb != NULL) { 197 if (Pdb != PrevPdb) { 198 Idx++; 199 PrevPdb = Pdb; 200 } 201 DEBUG ((EFI_D_ERROR, "PC 0x%012lx (0x%012lx+0x%08x) [% 2d] %a\n", 202 Fp[1], ImageBase, Fp[1] - ImageBase, Idx, BaseName (Pdb))); 203 } 204 } 205 PrevPdb = Pdb = GetImageName (SystemContext.SystemContextAArch64->ELR, &ImageBase, &PeCoffSizeOfHeader); 206 DEBUG ((EFI_D_ERROR, "\n[ 0] %a\n", Pdb)); 207 208 Idx = 0; 209 for (Fp = RootFp; Fp[0] != 0; Fp = (UINT64 *)Fp[0]) { 210 Pdb = GetImageName (Fp[1], &ImageBase, &PeCoffSizeOfHeader); 211 if (Pdb != NULL && Pdb != PrevPdb) { 212 DEBUG ((EFI_D_ERROR, "[% 2d] %a\n", ++Idx, Pdb)); 213 PrevPdb = Pdb; 214 } 215 } 216 } 217 } 218 DEBUG_CODE_END (); 219 220 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)); 221 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)); 222 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)); 223 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)); 224 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)); 225 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)); 226 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)); 227 DEBUG ((EFI_D_ERROR, " X28 0x%016lx FP 0x%016lx LR 0x%016lx \n", SystemContext.SystemContextAArch64->X28, SystemContext.SystemContextAArch64->FP, SystemContext.SystemContextAArch64->LR)); 228 229 /* We save these as 128bit numbers, but have to print them as two 64bit numbers, 230 so swap the 64bit words to correctly represent a 128bit number. */ 231 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])); 232 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])); 233 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])); 234 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])); 235 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])); 236 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])); 237 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])); 238 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])); 239 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])); 240 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])); 241 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])); 242 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])); 243 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])); 244 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])); 245 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])); 246 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])); 247 248 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)); 249 250 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 )); 251 252 DescribeExceptionSyndrome (SystemContext.SystemContextAArch64->ESR); 253 254 DEBUG ((EFI_D_ERROR, "\nStack dump:\n")); 255 for (Offset = -256; Offset < 256; Offset += 32) { 256 DEBUG ((EFI_D_ERROR, "%c %013lx: %016lx %016lx %016lx %016lx\n", 257 Offset == 0 ? '>' : ' ', 258 SystemContext.SystemContextAArch64->SP + Offset, 259 *(UINT64 *)(SystemContext.SystemContextAArch64->SP + Offset), 260 *(UINT64 *)(SystemContext.SystemContextAArch64->SP + Offset + 8), 261 *(UINT64 *)(SystemContext.SystemContextAArch64->SP + Offset + 16), 262 *(UINT64 *)(SystemContext.SystemContextAArch64->SP + Offset + 24))); 263 } 264 265 ASSERT (FALSE); 266 CpuDeadLoop (); 267 } 268
