summaryrefslogtreecommitdiff
path: root/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.h
blob: 4639ed2d9073758d062211659b3607798d5e5df3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
/** @file
  Common header file for CPU Exception Handler Library.

  Copyright (c) 2012 - 2016, Intel Corporation. All rights reserved.<BR>
  This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#ifndef _CPU_EXCEPTION_COMMON_H_
#define _CPU_EXCEPTION_COMMON_H_

#include <Ppi/VectorHandoffInfo.h>
#include <Protocol/Cpu.h>
#include <Library/BaseLib.h>
#include <Library/SerialPortLib.h>
#include <Library/PrintLib.h>
#include <Library/LocalApicLib.h>
#include <Library/PeCoffGetEntryPointLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/SynchronizationLib.h>

#define  CPU_EXCEPTION_NUM          32
#define  CPU_INTERRUPT_NUM         256
#define  HOOKAFTER_STUB_SIZE        16

#include "ArchInterruptDefs.h"

#define CPU_EXCEPTION_HANDLER_LIB_HOB_GUID \
  { \
    0xb21d9148, 0x9211, 0x4d8f, { 0xad, 0xd3, 0x66, 0xb1, 0x89, 0xc9, 0x2c, 0x83 } \
  }

//
// Record exception handler information
//
typedef struct {
  UINTN ExceptionStart;
  UINTN ExceptionStubHeaderSize;
  UINTN HookAfterStubHeaderStart;
} EXCEPTION_HANDLER_TEMPLATE_MAP;

typedef struct {
  UINTN                       IdtEntryCount;
  SPIN_LOCK                   DisplayMessageSpinLock;
  RESERVED_VECTORS_DATA       *ReservedVectors;
  EFI_CPU_INTERRUPT_HANDLER   *ExternalInterruptHandler;
} EXCEPTION_HANDLER_DATA;

extern CONST UINT32                mErrorCodeFlag;
extern CONST UINTN                 mImageAlignSize;
extern CONST UINTN                 mDoFarReturnFlag;

/**
  Return address map of exception handler template so that C code can generate
  exception tables.

  @param AddressMap  Pointer to a buffer where the address map is returned.
**/
VOID
EFIAPI
AsmGetTemplateAddressMap (
  OUT EXCEPTION_HANDLER_TEMPLATE_MAP *AddressMap
  );

/**
  Return address map of exception handler template so that C code can generate
  exception tables.

  @param IdtEntry          Pointer to IDT entry to be updated.
  @param InterruptHandler  IDT handler value.

**/
VOID
ArchUpdateIdtEntry (
  IN IA32_IDT_GATE_DESCRIPTOR        *IdtEntry,
  IN UINTN                           InterruptHandler
  );

/**
  Read IDT handler value from IDT entry.

  @param IdtEntry          Pointer to IDT entry to be read.

**/
UINTN
ArchGetIdtHandler (
  IN IA32_IDT_GATE_DESCRIPTOR        *IdtEntry
  );

/**
  Prints a message to the serial port.

  @param  Format      Format string for the message to print.
  @param  ...         Variable argument list whose contents are accessed 
                      based on the format string specified by Format.

**/
VOID
EFIAPI
InternalPrintMessage (
  IN  CONST CHAR8  *Format,
  ...
  );

/**
  Find and display image base address and return image base and its entry point.
  
  @param CurrentEip      Current instruction pointer.
  @param EntryPoint      Return module entry point if module header is found.
  
  @return !0     Image base address.
  @return 0      Image header cannot be found.
**/
UINTN 
FindModuleImageBase (
  IN  UINTN              CurrentEip,
  OUT UINTN              *EntryPoint
  );

/**
  Display CPU information.

  @param ExceptionType  Exception type.
  @param SystemContext  Pointer to EFI_SYSTEM_CONTEXT.
**/
VOID
DumpCpuContent (
  IN EFI_EXCEPTION_TYPE   ExceptionType,
  IN EFI_SYSTEM_CONTEXT   SystemContext
  );

/**
  Internal worker function to initialize exception handler.

  @param[in]      VectorInfo            Pointer to reserved vector list.
  @param[in, out] ExceptionHandlerData  Pointer to exception handler data.
  
  @retval EFI_SUCCESS           CPU Exception Entries have been successfully initialized 
                                with default exception handlers.
  @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
  @retval EFI_UNSUPPORTED       This function is not supported.

**/
EFI_STATUS
InitializeCpuExceptionHandlersWorker (
  IN EFI_VECTOR_HANDOFF_INFO       *VectorInfo OPTIONAL,
  IN OUT EXCEPTION_HANDLER_DATA    *ExceptionHandlerData
  );

/**
  Registers a function to be called from the processor interrupt handler.

  @param[in]  InterruptType        Defines which interrupt or exception to hook.
  @param[in]  InterruptHandler     A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
                                   when a processor interrupt occurs. If this parameter is NULL, then the handler
                                   will be uninstalled
  @param[in] ExceptionHandlerData  Pointer to exception handler data.

  @retval EFI_SUCCESS           The handler for the processor interrupt was successfully installed or uninstalled.
  @retval EFI_ALREADY_STARTED   InterruptHandler is not NULL, and a handler for InterruptType was
                                previously installed.
  @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not
                                previously installed.
  @retval EFI_UNSUPPORTED       The interrupt specified by InterruptType is not supported,
                                or this function is not supported.
**/
EFI_STATUS
RegisterCpuInterruptHandlerWorker (
  IN EFI_EXCEPTION_TYPE            InterruptType,
  IN EFI_CPU_INTERRUPT_HANDLER     InterruptHandler,
  IN EXCEPTION_HANDLER_DATA        *ExceptionHandlerData
  );

/**
  Internal worker function to update IDT entries accordling to vector attributes.

  @param[in] IdtTable              Pointer to IDT table.
  @param[in] TemplateMap           Pointer to a buffer where the address map is
                                   returned.
  @param[in] ExceptionHandlerData  Pointer to exception handler data.

**/
VOID
UpdateIdtTable (
  IN IA32_IDT_GATE_DESCRIPTOR        *IdtTable,
  IN EXCEPTION_HANDLER_TEMPLATE_MAP  *TemplateMap,
  IN EXCEPTION_HANDLER_DATA          *ExceptionHandlerData
  );

/**
  Save CPU exception context when handling EFI_VECTOR_HANDOFF_HOOK_AFTER case.

  @param[in] ExceptionType        Exception type.
  @param[in] SystemContext        Pointer to EFI_SYSTEM_CONTEXT.
  @param[in] ExceptionHandlerData Pointer to exception handler data.
**/
VOID
ArchSaveExceptionContext (
  IN UINTN                        ExceptionType,
  IN EFI_SYSTEM_CONTEXT           SystemContext,
  IN EXCEPTION_HANDLER_DATA       *ExceptionHandlerData
  );

/**
  Restore CPU exception context when handling EFI_VECTOR_HANDOFF_HOOK_AFTER case.

  @param[in] ExceptionType        Exception type.
  @param[in] SystemContext        Pointer to EFI_SYSTEM_CONTEXT.
  @param[in] ExceptionHandlerData Pointer to exception handler data.
**/
VOID
ArchRestoreExceptionContext (
  IN UINTN                        ExceptionType,
  IN EFI_SYSTEM_CONTEXT           SystemContext,
  IN EXCEPTION_HANDLER_DATA       *ExceptionHandlerData
  );

/**
  Fix up the vector number and function address in the vector code.
 
  @param[in] NewVectorAddr   New vector handler address.
  @param[in] VectorNum       Index of vector.
  @param[in] OldVectorAddr   Old vector handler address.

**/
VOID
EFIAPI
AsmVectorNumFixup (
  IN VOID    *NewVectorAddr,
  IN UINT8   VectorNum,
  IN VOID    *OldVectorAddr
  );

/**
  Read and save reserved vector information
  
  @param[in]  VectorInfo        Pointer to reserved vector list.
  @param[out] ReservedVector    Pointer to reserved vector data buffer.
  @param[in]  VectorCount       Vector number to be updated.
  
  @return EFI_SUCCESS           Read and save vector info successfully.
  @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.

**/
EFI_STATUS
ReadAndVerifyVectorInfo (
  IN  EFI_VECTOR_HANDOFF_INFO       *VectorInfo,
  OUT RESERVED_VECTORS_DATA         *ReservedVector,
  IN  UINTN                         VectorCount
  );

/**
  Get ASCII format string exception name by exception type.

  @param ExceptionType  Exception type.

  @return  ASCII format string exception name.
**/
CONST CHAR8 *
GetExceptionNameStr (
  IN EFI_EXCEPTION_TYPE          ExceptionType
  );

/**
  Internal worker function for common exception handler.

  @param ExceptionType         Exception type.
  @param SystemContext         Pointer to EFI_SYSTEM_CONTEXT.
  @param ExceptionHandlerData  Pointer to exception handler data.
**/
VOID
CommonExceptionHandlerWorker (
  IN EFI_EXCEPTION_TYPE          ExceptionType, 
  IN EFI_SYSTEM_CONTEXT          SystemContext,
  IN EXCEPTION_HANDLER_DATA      *ExceptionHandlerData
  );

#endif