1 /** @file
2 CPU Exception Handler Library common functions.
3
4 Copyright (c) 2012 - 2019, Intel Corporation. All rights reserved.<BR>
5 SPDX-License-Identifier: BSD-2-Clause-Patent
6
7 **/
8
9 #include "CpuExceptionCommon.h"
10
11 //
12 // Error code flag indicating whether or not an error code will be
13 // pushed on the stack if an exception occurs.
14 //
15 // 1 means an error code will be pushed, otherwise 0
16 //
17 CONST UINT32 mErrorCodeFlag = 0x00227d00;
18
19 //
20 // Define the maximum message length
21 //
22 #define MAX_DEBUG_MESSAGE_LENGTH 0x100
23
24 CONST CHAR8 mExceptionReservedStr[] = "Reserved";
25 CONST CHAR8 *mExceptionNameStr[] = {
26 "#DE - Divide Error",
27 "#DB - Debug",
28 "NMI Interrupt",
29 "#BP - Breakpoint",
30 "#OF - Overflow",
31 "#BR - BOUND Range Exceeded",
32 "#UD - Invalid Opcode",
33 "#NM - Device Not Available",
34 "#DF - Double Fault",
35 "Coprocessor Segment Overrun",
36 "#TS - Invalid TSS",
37 "#NP - Segment Not Present",
38 "#SS - Stack Fault Fault",
39 "#GP - General Protection",
40 "#PF - Page-Fault",
41 "Reserved",
42 "#MF - x87 FPU Floating-Point Error",
43 "#AC - Alignment Check",
44 "#MC - Machine-Check",
45 "#XM - SIMD floating-point",
46 "#VE - Virtualization",
47 "#CP - Control Protection"
48 };
49
50 #define EXCEPTION_KNOWN_NAME_NUM (sizeof (mExceptionNameStr) / sizeof (CHAR8 *))
51
52 /**
53 Get ASCII format string exception name by exception type.
54
55 @param ExceptionType Exception type.
56
57 @return ASCII format string exception name.
58 **/
59 CONST CHAR8 *
GetExceptionNameStr(IN EFI_EXCEPTION_TYPE ExceptionType)60 GetExceptionNameStr (
61 IN EFI_EXCEPTION_TYPE ExceptionType
62 )
63 {
64 if ((UINTN) ExceptionType < EXCEPTION_KNOWN_NAME_NUM) {
65 return mExceptionNameStr[ExceptionType];
66 } else {
67 return mExceptionReservedStr;
68 }
69 }
70
71 /**
72 Prints a message to the serial port.
73
74 @param Format Format string for the message to print.
75 @param ... Variable argument list whose contents are accessed
76 based on the format string specified by Format.
77
78 **/
79 VOID
80 EFIAPI
InternalPrintMessage(IN CONST CHAR8 * Format,...)81 InternalPrintMessage (
82 IN CONST CHAR8 *Format,
83 ...
84 )
85 {
86 CHAR8 Buffer[MAX_DEBUG_MESSAGE_LENGTH];
87 VA_LIST Marker;
88
89 //
90 // Convert the message to an ASCII String
91 //
92 VA_START (Marker, Format);
93 AsciiVSPrint (Buffer, sizeof (Buffer), Format, Marker);
94 VA_END (Marker);
95
96 //
97 // Send the print string to a Serial Port
98 //
99 SerialPortWrite ((UINT8 *)Buffer, AsciiStrLen (Buffer));
100 }
101
102 /**
103 Find and display image base address and return image base and its entry point.
104
105 @param CurrentEip Current instruction pointer.
106
107 **/
108 VOID
DumpModuleImageInfo(IN UINTN CurrentEip)109 DumpModuleImageInfo (
110 IN UINTN CurrentEip
111 )
112 {
113 EFI_STATUS Status;
114 UINTN Pe32Data;
115 VOID *PdbPointer;
116 VOID *EntryPoint;
117
118 Pe32Data = PeCoffSearchImageBase (CurrentEip);
119 if (Pe32Data == 0) {
120 InternalPrintMessage ("!!!! Can't find image information. !!!!\n");
121 } else {
122 //
123 // Find Image Base entry point
124 //
125 Status = PeCoffLoaderGetEntryPoint ((VOID *) Pe32Data, &EntryPoint);
126 if (EFI_ERROR (Status)) {
127 EntryPoint = NULL;
128 }
129 InternalPrintMessage ("!!!! Find image based on IP(0x%x) ", CurrentEip);
130 PdbPointer = PeCoffLoaderGetPdbPointer ((VOID *) Pe32Data);
131 if (PdbPointer != NULL) {
132 InternalPrintMessage ("%a", PdbPointer);
133 } else {
134 InternalPrintMessage ("(No PDB) " );
135 }
136 InternalPrintMessage (
137 " (ImageBase=%016lp, EntryPoint=%016p) !!!!\n",
138 (VOID *) Pe32Data,
139 EntryPoint
140 );
141 }
142 }
143
144 /**
145 Read and save reserved vector information
146
147 @param[in] VectorInfo Pointer to reserved vector list.
148 @param[out] ReservedVector Pointer to reserved vector data buffer.
149 @param[in] VectorCount Vector number to be updated.
150
151 @return EFI_SUCCESS Read and save vector info successfully.
152 @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
153
154 **/
155 EFI_STATUS
ReadAndVerifyVectorInfo(IN EFI_VECTOR_HANDOFF_INFO * VectorInfo,OUT RESERVED_VECTORS_DATA * ReservedVector,IN UINTN VectorCount)156 ReadAndVerifyVectorInfo (
157 IN EFI_VECTOR_HANDOFF_INFO *VectorInfo,
158 OUT RESERVED_VECTORS_DATA *ReservedVector,
159 IN UINTN VectorCount
160 )
161 {
162 while (VectorInfo->Attribute != EFI_VECTOR_HANDOFF_LAST_ENTRY) {
163 if (VectorInfo->Attribute > EFI_VECTOR_HANDOFF_HOOK_AFTER) {
164 //
165 // If vector attrubute is invalid
166 //
167 return EFI_INVALID_PARAMETER;
168 }
169 if (VectorInfo->VectorNumber < VectorCount) {
170 ReservedVector[VectorInfo->VectorNumber].Attribute = VectorInfo->Attribute;
171 }
172 VectorInfo ++;
173 }
174 return EFI_SUCCESS;
175 }
176