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1 | /** @file\r | |
2 | Generic debug support macros, typedefs and prototypes for IA32/x64.\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #ifndef _DEBUG_SUPPORT_H_\r | |
16 | #define _DEBUG_SUPPORT_H_\r | |
17 | \r | |
18 | #include <Uefi.h>\r | |
19 | \r | |
20 | #include <Protocol/DebugSupport.h>\r | |
21 | #include <Protocol/LoadedImage.h>\r | |
22 | \r | |
23 | #include <Library/DebugLib.h>\r | |
24 | #include <Library/UefiDriverEntryPoint.h>\r | |
25 | #include <Library/BaseMemoryLib.h>\r | |
26 | #include <Library/MemoryAllocationLib.h>\r | |
27 | #include <Library/UefiBootServicesTableLib.h>\r | |
28 | #include <Library/BaseLib.h>\r | |
29 | \r | |
30 | #define NUM_IDT_ENTRIES 0x78\r | |
31 | #define SYSTEM_TIMER_VECTOR 0x68\r | |
32 | \r | |
33 | typedef\r | |
34 | VOID\r | |
35 | (*DEBUG_PROC) (\r | |
36 | VOID\r | |
37 | );\r | |
38 | \r | |
39 | typedef\r | |
40 | VOID\r | |
41 | (EFIAPI *CALLBACK_FUNC) (\r | |
42 | );\r | |
43 | \r | |
44 | typedef struct {\r | |
45 | IA32_IDT_GATE_DESCRIPTOR OrigDesc;\r | |
46 | DEBUG_PROC OrigVector;\r | |
47 | IA32_IDT_GATE_DESCRIPTOR NewDesc;\r | |
48 | DEBUG_PROC StubEntry;\r | |
49 | CALLBACK_FUNC RegisteredCallback;\r | |
50 | } IDT_ENTRY;\r | |
51 | \r | |
52 | extern UINT8 InterruptEntryStub[];\r | |
53 | extern UINT32 StubSize;\r | |
54 | extern VOID (*OrigVector) (VOID);\r | |
55 | extern IDT_ENTRY *IdtEntryTable;\r | |
56 | extern IA32_IDT_GATE_DESCRIPTOR NullDesc;\r | |
57 | \r | |
58 | /**\r | |
59 | Generic IDT entry.\r | |
60 | \r | |
61 | **/\r | |
62 | VOID\r | |
63 | CommonIdtEntry (\r | |
64 | VOID\r | |
65 | );\r | |
66 | \r | |
67 | /**\r | |
68 | Check whether FXSTOR is supported\r | |
69 | \r | |
70 | @retval TRUE FXSTOR is supported.\r | |
71 | @retval FALSE FXSTOR is not supported.\r | |
72 | \r | |
73 | **/\r | |
74 | BOOLEAN\r | |
75 | FxStorSupport (\r | |
76 | VOID\r | |
77 | );\r | |
78 | \r | |
79 | /**\r | |
80 | Encodes an IDT descriptor with the given physical address.\r | |
81 | \r | |
82 | @param DestDesc The IDT descriptor address.\r | |
83 | @param Vecotr The interrupt vector entry.\r | |
84 | \r | |
85 | **/\r | |
86 | VOID\r | |
87 | Vect2Desc (\r | |
88 | IA32_IDT_GATE_DESCRIPTOR * DestDesc,\r | |
89 | VOID (*Vector) (VOID)\r | |
90 | );\r | |
91 | \r | |
92 | /**\r | |
93 | Initializes driver's handler registration database.\r | |
94 | \r | |
95 | This code executes in boot services context\r | |
96 | Must be public because it's referenced from DebugSupport.c\r | |
97 | \r | |
98 | @retval EFI_UNSUPPORTED If IA32 processor does not support FXSTOR/FXRSTOR instructions,\r | |
99 | the context save will fail, so these processor's are not supported.\r | |
100 | @retval EFI_OUT_OF_RESOURCES Fails to allocate memory.\r | |
101 | @retval EFI_SUCCESS Initializes successfully.\r | |
102 | \r | |
103 | **/\r | |
104 | EFI_STATUS\r | |
105 | PlInitializeDebugSupportDriver (\r | |
106 | VOID\r | |
107 | );\r | |
108 | \r | |
109 | /**\r | |
110 | This is the callback that is written to the LoadedImage protocol instance\r | |
111 | on the image handle. It uninstalls all registered handlers and frees all entry\r | |
112 | stub memory.\r | |
113 | \r | |
114 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
115 | \r | |
116 | @retval EFI_SUCCESS Always.\r | |
117 | \r | |
118 | **/\r | |
119 | EFI_STATUS\r | |
120 | EFIAPI\r | |
121 | PlUnloadDebugSupportDriver (\r | |
122 | IN EFI_HANDLE ImageHandle\r | |
123 | );\r | |
124 | \r | |
125 | /**\r | |
126 | Returns the maximum value that may be used for the ProcessorIndex parameter in\r | |
127 | RegisterPeriodicCallback() and RegisterExceptionCallback().\r | |
128 | \r | |
129 | Hard coded to support only 1 processor for now.\r | |
130 | \r | |
131 | @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.\r | |
132 | @param MaxProcessorIndex Pointer to a caller-allocated UINTN in which the maximum supported\r | |
133 | processor index is returned. Always 0 returned.\r | |
134 | \r | |
135 | @retval EFI_SUCCESS Always returned with **MaxProcessorIndex set to 0.\r | |
136 | \r | |
137 | **/\r | |
138 | EFI_STATUS\r | |
139 | EFIAPI\r | |
140 | GetMaximumProcessorIndex (\r | |
141 | IN EFI_DEBUG_SUPPORT_PROTOCOL *This,\r | |
142 | OUT UINTN *MaxProcessorIndex\r | |
143 | );\r | |
144 | \r | |
145 | /**\r | |
146 | Registers a function to be called back periodically in interrupt context.\r | |
147 | \r | |
148 | @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.\r | |
149 | @param ProcessorIndex Specifies which processor the callback function applies to.\r | |
150 | @param PeriodicCallback A pointer to a function of type PERIODIC_CALLBACK that is the main\r | |
151 | periodic entry point of the debug agent.\r | |
152 | \r | |
153 | @retval EFI_SUCCESS The function completed successfully.\r | |
154 | @retval EFI_ALREADY_STARTED Non-NULL PeriodicCallback parameter when a callback\r | |
155 | function was previously registered.\r | |
156 | @retval EFI_OUT_OF_RESOURCES System has insufficient memory resources to register new callback\r | |
157 | function.\r | |
158 | **/\r | |
159 | EFI_STATUS\r | |
160 | EFIAPI\r | |
161 | RegisterPeriodicCallback (\r | |
162 | IN EFI_DEBUG_SUPPORT_PROTOCOL *This,\r | |
163 | IN UINTN ProcessorIndex,\r | |
164 | IN EFI_PERIODIC_CALLBACK PeriodicCallback\r | |
165 | );\r | |
166 | \r | |
167 | /**\r | |
168 | Registers a function to be called when a given processor exception occurs.\r | |
169 | \r | |
170 | This code executes in boot services context.\r | |
171 | \r | |
172 | @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.\r | |
173 | @param ProcessorIndex Specifies which processor the callback function applies to.\r | |
174 | @param ExceptionCallback A pointer to a function of type EXCEPTION_CALLBACK that is called\r | |
175 | when the processor exception specified by ExceptionType occurs.\r | |
176 | @param ExceptionType Specifies which processor exception to hook.\r | |
177 | \r | |
178 | @retval EFI_SUCCESS The function completed successfully.\r | |
179 | @retval EFI_ALREADY_STARTED Non-NULL PeriodicCallback parameter when a callback\r | |
180 | function was previously registered.\r | |
181 | @retval EFI_OUT_OF_RESOURCES System has insufficient memory resources to register new callback\r | |
182 | function.\r | |
183 | **/\r | |
184 | EFI_STATUS\r | |
185 | EFIAPI\r | |
186 | RegisterExceptionCallback (\r | |
187 | IN EFI_DEBUG_SUPPORT_PROTOCOL *This,\r | |
188 | IN UINTN ProcessorIndex,\r | |
189 | IN EFI_EXCEPTION_CALLBACK ExceptionCallback,\r | |
190 | IN EFI_EXCEPTION_TYPE ExceptionType\r | |
191 | );\r | |
192 | \r | |
193 | /**\r | |
194 | Invalidates processor instruction cache for a memory range. Subsequent execution in this range\r | |
195 | causes a fresh memory fetch to retrieve code to be executed.\r | |
196 | \r | |
197 | @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.\r | |
198 | @param ProcessorIndex Specifies which processor's instruction cache is to be invalidated.\r | |
199 | @param Start Specifies the physical base of the memory range to be invalidated.\r | |
200 | @param Length Specifies the minimum number of bytes in the processor's instruction\r | |
201 | cache to invalidate.\r | |
202 | \r | |
203 | @retval EFI_SUCCESS Always returned.\r | |
204 | \r | |
205 | **/\r | |
206 | EFI_STATUS\r | |
207 | EFIAPI\r | |
208 | InvalidateInstructionCache (\r | |
209 | IN EFI_DEBUG_SUPPORT_PROTOCOL *This,\r | |
210 | IN UINTN ProcessorIndex,\r | |
211 | IN VOID *Start,\r | |
212 | IN UINT64 Length\r | |
213 | );\r | |
214 | \r | |
215 | /**\r | |
216 | Allocate pool for a new IDT entry stub.\r | |
217 | \r | |
218 | Copy the generic stub into the new buffer and fixup the vector number\r | |
219 | and jump target address.\r | |
220 | \r | |
221 | @param ExceptionType This is the exception type that the new stub will be created\r | |
222 | for.\r | |
223 | @param Stub On successful exit, *Stub contains the newly allocated entry stub.\r | |
224 | \r | |
225 | **/\r | |
226 | VOID\r | |
227 | CreateEntryStub (\r | |
228 | IN EFI_EXCEPTION_TYPE ExceptionType,\r | |
229 | OUT VOID **Stub\r | |
230 | );\r | |
231 | \r | |
232 | /**\r | |
233 | Get Interrupt Handle from IDT Gate Descriptor.\r | |
234 | \r | |
235 | @param IdtGateDecriptor IDT Gate Descriptor.\r | |
236 | \r | |
237 | @return Interrupt Handle stored in IDT Gate Descriptor.\r | |
238 | \r | |
239 | **/\r | |
240 | UINTN\r | |
241 | GetInterruptHandleFromIdt (\r | |
242 | IN IA32_IDT_GATE_DESCRIPTOR *IdtGateDecriptor\r | |
243 | );\r | |
244 | \r | |
245 | /**\r | |
246 | This is the main worker function that manages the state of the interrupt\r | |
247 | handlers. It both installs and uninstalls interrupt handlers based on the\r | |
248 | value of NewCallback. If NewCallback is NULL, then uninstall is indicated.\r | |
249 | If NewCallback is non-NULL, then install is indicated.\r | |
250 | \r | |
251 | @param NewCallback If non-NULL, NewCallback specifies the new handler to register.\r | |
252 | If NULL, specifies that the previously registered handler should\r | |
253 | be uninstalled.\r | |
254 | @param ExceptionType Indicates which entry to manage.\r | |
255 | \r | |
256 | @retval EFI_SUCCESS Process is ok.\r | |
257 | @retval EFI_INVALID_PARAMETER Requested uninstalling a handler from a vector that has\r | |
258 | no handler registered for it\r | |
259 | @retval EFI_ALREADY_STARTED Requested install to a vector that already has a handler registered.\r | |
260 | @retval others Possible return values are passed through from UnHookEntry and HookEntry.\r | |
261 | \r | |
262 | **/\r | |
263 | EFI_STATUS\r | |
264 | ManageIdtEntryTable (\r | |
265 | CALLBACK_FUNC NewCallback,\r | |
266 | EFI_EXCEPTION_TYPE ExceptionType\r | |
267 | );\r | |
268 | \r | |
269 | /**\r | |
270 | Creates a nes entry stub. Then saves the current IDT entry and replaces it\r | |
271 | with an interrupt gate for the new entry point. The IdtEntryTable is updated\r | |
272 | with the new registered function.\r | |
273 | \r | |
274 | This code executes in boot services context. The stub entry executes in interrupt\r | |
275 | context.\r | |
276 | \r | |
277 | @param ExceptionType Specifies which vector to hook.\r | |
278 | @param NewCallback A pointer to the new function to be registered.\r | |
279 | \r | |
280 | **/\r | |
281 | VOID\r | |
282 | HookEntry (\r | |
283 | IN EFI_EXCEPTION_TYPE ExceptionType,\r | |
284 | IN CALLBACK_FUNC NewCallback\r | |
285 | );\r | |
286 | \r | |
287 | /**\r | |
288 | Undoes HookEntry. This code executes in boot services context.\r | |
289 | \r | |
290 | @param ExceptionType Specifies which entry to unhook\r | |
291 | \r | |
292 | **/\r | |
293 | VOID\r | |
294 | UnhookEntry (\r | |
295 | IN EFI_EXCEPTION_TYPE ExceptionType\r | |
296 | );\r | |
297 | \r | |
298 | #endif\r |