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
DescribeInstructionOrDataAbort(IN CHAR8 * AbortType,IN UINTN Iss)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
DescribeExceptionSyndrome(IN UINT32 Esr)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 *
BaseName(IN CONST CHAR8 * FullName)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
DefaultExceptionHandler(IN EFI_EXCEPTION_TYPE ExceptionType,IN OUT EFI_SYSTEM_CONTEXT SystemContext)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