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28a00297 | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation \r | |
4 | All rights reserved. This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | CoreSectionExtraction.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | Section Extraction Protocol implementation.\r | |
19 | \r | |
20 | Stream database is implemented as a linked list of section streams,\r | |
21 | where each stream contains a linked list of children, which may be leaves or\r | |
22 | encapsulations. \r | |
23 | \r | |
24 | Children that are encapsulations generate new stream entries\r | |
25 | when they are created. Streams can also be created by calls to \r | |
26 | SEP->OpenSectionStream().\r | |
27 | \r | |
28 | The database is only created far enough to return the requested data from\r | |
29 | any given stream, or to determine that the requested data is not found.\r | |
30 | \r | |
31 | If a GUIDed encapsulation is encountered, there are three possiblilites.\r | |
32 | \r | |
33 | 1) A support protocol is found, in which the stream is simply processed with\r | |
34 | the support protocol.\r | |
35 | \r | |
36 | 2) A support protocol is not found, but the data is available to be read\r | |
37 | without processing. In this case, the database is built up through the\r | |
38 | recursions to return the data, and a RPN event is set that will enable\r | |
39 | the stream in question to be refreshed if and when the required section\r | |
40 | extraction protocol is published.This insures the AuthenticationStatus \r | |
41 | does not become stale in the cache.\r | |
42 | \r | |
43 | 3) A support protocol is not found, and the data is not available to be read\r | |
44 | without it. This results in EFI_PROTOCOL_ERROR.\r | |
45 | \r | |
46 | --*/\r | |
47 | \r | |
48 | #include <DxeMain.h>\r | |
49 | \r | |
50 | //\r | |
51 | // Local defines and typedefs\r | |
52 | //\r | |
53 | #define CORE_SECTION_CHILD_SIGNATURE EFI_SIGNATURE_32('S','X','C','S')\r | |
54 | #define CHILD_SECTION_NODE_FROM_LINK(Node) \\r | |
55 | CR (Node, CORE_SECTION_CHILD_NODE, Link, CORE_SECTION_CHILD_SIGNATURE)\r | |
56 | \r | |
57 | typedef struct {\r | |
58 | UINT32 Signature;\r | |
59 | LIST_ENTRY Link;\r | |
60 | UINT32 Type;\r | |
61 | UINT32 Size;\r | |
62 | //\r | |
63 | // StreamBase + OffsetInStream == pointer to section header in stream. The\r | |
64 | // stream base is always known when walking the sections within.\r | |
65 | //\r | |
66 | UINT32 OffsetInStream;\r | |
67 | //\r | |
68 | // Then EncapsulatedStreamHandle below is always 0 if the section is NOT an\r | |
69 | // encapsulating section. Otherwise, it contains the stream handle\r | |
70 | // of the encapsulated stream. This handle is ALWAYS produced any time an\r | |
71 | // encapsulating child is encountered, irrespective of whether the\r | |
72 | // encapsulated stream is processed further.\r | |
73 | //\r | |
74 | UINTN EncapsulatedStreamHandle;\r | |
75 | EFI_GUID *EncapsulationGuid;\r | |
76 | } CORE_SECTION_CHILD_NODE;\r | |
77 | \r | |
78 | #define CORE_SECTION_STREAM_SIGNATURE EFI_SIGNATURE_32('S','X','S','S')\r | |
79 | #define STREAM_NODE_FROM_LINK(Node) \\r | |
80 | CR (Node, CORE_SECTION_STREAM_NODE, Link, CORE_SECTION_STREAM_SIGNATURE)\r | |
81 | \r | |
82 | typedef struct {\r | |
83 | UINT32 Signature;\r | |
84 | LIST_ENTRY Link;\r | |
85 | UINTN StreamHandle;\r | |
86 | UINT8 *StreamBuffer;\r | |
87 | UINTN StreamLength;\r | |
88 | LIST_ENTRY Children;\r | |
89 | //\r | |
90 | // Authentication status is from GUIDed encapsulations.\r | |
91 | //\r | |
92 | UINT32 AuthenticationStatus;\r | |
93 | } CORE_SECTION_STREAM_NODE;\r | |
94 | \r | |
95 | #define NULL_STREAM_HANDLE 0\r | |
96 | \r | |
97 | typedef struct {\r | |
98 | CORE_SECTION_CHILD_NODE *ChildNode;\r | |
99 | CORE_SECTION_STREAM_NODE *ParentStream;\r | |
100 | VOID *Registration;\r | |
101 | EFI_EVENT Event;\r | |
102 | } RPN_EVENT_CONTEXT;\r | |
103 | \r | |
104 | \r | |
105 | \r | |
106 | //\r | |
107 | // Local prototypes\r | |
108 | //\r | |
109 | \r | |
110 | STATIC\r | |
111 | BOOLEAN\r | |
112 | ChildIsType (\r | |
113 | IN CORE_SECTION_STREAM_NODE *Stream,\r | |
114 | IN CORE_SECTION_CHILD_NODE *Child,\r | |
115 | IN EFI_SECTION_TYPE SearchType,\r | |
116 | IN EFI_GUID *SectionDefinitionGuid\r | |
117 | );\r | |
118 | \r | |
119 | STATIC\r | |
120 | VOID\r | |
121 | EFIAPI\r | |
122 | NotifyGuidedExtraction (\r | |
123 | IN EFI_EVENT Event,\r | |
124 | IN VOID *RpnContext\r | |
125 | );\r | |
126 | \r | |
127 | STATIC\r | |
128 | VOID\r | |
129 | CreateGuidedExtractionRpnEvent (\r | |
130 | IN CORE_SECTION_STREAM_NODE *ParentStream,\r | |
131 | IN CORE_SECTION_CHILD_NODE *ChildNode\r | |
132 | );\r | |
133 | \r | |
134 | STATIC\r | |
135 | EFI_STATUS\r | |
136 | EFIAPI\r | |
137 | OpenSectionStream (\r | |
138 | IN EFI_SECTION_EXTRACTION_PROTOCOL *This,\r | |
139 | IN UINTN SectionStreamLength,\r | |
140 | IN VOID *SectionStream,\r | |
141 | OUT UINTN *SectionStreamHandle\r | |
142 | );\r | |
143 | \r | |
144 | STATIC\r | |
145 | EFI_STATUS\r | |
146 | EFIAPI\r | |
147 | GetSection (\r | |
148 | IN EFI_SECTION_EXTRACTION_PROTOCOL *This,\r | |
149 | IN UINTN SectionStreamHandle,\r | |
150 | IN EFI_SECTION_TYPE *SectionType,\r | |
151 | IN EFI_GUID *SectionDefinitionGuid,\r | |
152 | IN UINTN SectionInstance,\r | |
153 | IN VOID **Buffer,\r | |
154 | IN OUT UINTN *BufferSize,\r | |
155 | OUT UINT32 *AuthenticationStatus\r | |
156 | );\r | |
157 | \r | |
158 | STATIC\r | |
159 | EFI_STATUS\r | |
160 | EFIAPI\r | |
161 | CloseSectionStream (\r | |
162 | IN EFI_SECTION_EXTRACTION_PROTOCOL *This,\r | |
163 | IN UINTN StreamHandleToClose\r | |
164 | );\r | |
165 | \r | |
166 | STATIC\r | |
167 | EFI_STATUS\r | |
168 | FindStreamNode (\r | |
169 | IN UINTN SearchHandle,\r | |
170 | OUT CORE_SECTION_STREAM_NODE **FoundStream\r | |
171 | );\r | |
172 | \r | |
173 | STATIC\r | |
174 | EFI_STATUS\r | |
175 | FindChildNode (\r | |
176 | IN CORE_SECTION_STREAM_NODE *SourceStream,\r | |
177 | IN EFI_SECTION_TYPE SearchType,\r | |
178 | IN UINTN *SectionInstance,\r | |
179 | IN EFI_GUID *SectionDefinitionGuid,\r | |
180 | OUT CORE_SECTION_CHILD_NODE **FoundChild,\r | |
181 | OUT CORE_SECTION_STREAM_NODE **FoundStream,\r | |
182 | OUT UINT32 *AuthenticationStatus\r | |
183 | );\r | |
184 | \r | |
185 | STATIC\r | |
186 | EFI_STATUS\r | |
187 | CreateChildNode (\r | |
188 | IN CORE_SECTION_STREAM_NODE *Stream,\r | |
189 | IN UINT32 ChildOffset,\r | |
190 | OUT CORE_SECTION_CHILD_NODE **ChildNode\r | |
191 | );\r | |
192 | \r | |
193 | STATIC\r | |
194 | VOID\r | |
195 | FreeChildNode (\r | |
196 | IN CORE_SECTION_CHILD_NODE *ChildNode\r | |
197 | );\r | |
198 | \r | |
199 | STATIC\r | |
200 | EFI_STATUS\r | |
201 | OpenSectionStreamEx (\r | |
202 | IN UINTN SectionStreamLength,\r | |
203 | IN VOID *SectionStream,\r | |
204 | IN BOOLEAN AllocateBuffer,\r | |
205 | IN UINT32 AuthenticationStatus, \r | |
206 | OUT UINTN *SectionStreamHandle\r | |
207 | );\r | |
208 | \r | |
209 | STATIC\r | |
210 | BOOLEAN\r | |
211 | IsValidSectionStream (\r | |
212 | IN VOID *SectionStream,\r | |
213 | IN UINTN SectionStreamLength\r | |
214 | );\r | |
d8c79a81 LG |
215 | \r |
216 | EFI_STATUS\r | |
217 | CustomDecompressExtractSection (\r | |
218 | IN CONST EFI_GUIDED_SECTION_EXTRACTION_PROTOCOL *This,\r | |
219 | IN CONST VOID *InputSection,\r | |
220 | OUT VOID **OutputBuffer,\r | |
221 | OUT UINTN *OutputSize,\r | |
222 | OUT UINT32 *AuthenticationStatus\r | |
223 | ); \r | |
28a00297 | 224 | //\r |
225 | // Module globals\r | |
226 | //\r | |
227 | LIST_ENTRY mStreamRoot = INITIALIZE_LIST_HEAD_VARIABLE (mStreamRoot);\r | |
228 | \r | |
229 | EFI_HANDLE mSectionExtractionHandle = NULL;\r | |
230 | \r | |
231 | EFI_SECTION_EXTRACTION_PROTOCOL mSectionExtraction = { \r | |
232 | OpenSectionStream, \r | |
233 | GetSection, \r | |
234 | CloseSectionStream\r | |
235 | };\r | |
236 | \r | |
d8c79a81 LG |
237 | EFI_GUIDED_SECTION_EXTRACTION_PROTOCOL mCustomDecompressExtraction = {\r |
238 | CustomDecompressExtractSection\r | |
239 | };\r | |
28a00297 | 240 | \r |
241 | EFI_STATUS\r | |
242 | EFIAPI\r | |
243 | InitializeSectionExtraction (\r | |
244 | IN EFI_HANDLE ImageHandle,\r | |
245 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
246 | )\r | |
247 | /*++\r | |
248 | \r | |
249 | Routine Description: \r | |
250 | Entry point of the section extraction code. Initializes an instance of the \r | |
251 | section extraction interface and installs it on a new handle.\r | |
252 | \r | |
253 | Arguments: \r | |
254 | ImageHandle EFI_HANDLE: A handle for the image that is initializing this driver\r | |
255 | SystemTable EFI_SYSTEM_TABLE: A pointer to the EFI system table \r | |
256 | \r | |
257 | Returns: \r | |
258 | EFI_SUCCESS: Driver initialized successfully\r | |
259 | EFI_OUT_OF_RESOURCES: Could not allocate needed resources\r | |
260 | \r | |
261 | --*/\r | |
262 | {\r | |
263 | EFI_STATUS Status;\r | |
d8c79a81 | 264 | EFI_GUID **DecompressGuidList;\r |
7a31af6a | 265 | UINTN DecompressMethodNumber;\r |
28a00297 | 266 | \r |
267 | //\r | |
268 | // Install SEP to a new handle\r | |
269 | //\r | |
270 | Status = CoreInstallProtocolInterface (\r | |
271 | &mSectionExtractionHandle,\r | |
272 | &gEfiSectionExtractionProtocolGuid,\r | |
273 | EFI_NATIVE_INTERFACE,\r | |
274 | &mSectionExtraction\r | |
275 | );\r | |
276 | ASSERT_EFI_ERROR (Status);\r | |
277 | \r | |
d8c79a81 LG |
278 | //\r |
279 | // Get custom decompress method guid list \r | |
280 | //\r | |
281 | DecompressGuidList = NULL;\r | |
282 | DecompressMethodNumber = 0;\r | |
283 | Status = CustomDecompressGetAlgorithms (DecompressGuidList, &DecompressMethodNumber);\r | |
284 | if (Status == EFI_OUT_OF_RESOURCES) {\r | |
285 | DecompressGuidList = (EFI_GUID **) CoreAllocateBootServicesPool (DecompressMethodNumber * sizeof (EFI_GUID *));\r | |
286 | ASSERT (DecompressGuidList != NULL);\r | |
287 | Status = CustomDecompressGetAlgorithms (DecompressGuidList, &DecompressMethodNumber);\r | |
288 | }\r | |
289 | ASSERT_EFI_ERROR(Status);\r | |
290 | \r | |
291 | //\r | |
292 | // Install custom decompress guided extraction protocol \r | |
293 | //\r | |
294 | while (DecompressMethodNumber-- > 0) {\r | |
295 | Status = CoreInstallProtocolInterface (\r | |
296 | &mSectionExtractionHandle,\r | |
297 | DecompressGuidList [DecompressMethodNumber],\r | |
298 | EFI_NATIVE_INTERFACE,\r | |
299 | &mCustomDecompressExtraction\r | |
300 | );\r | |
301 | ASSERT_EFI_ERROR (Status);\r | |
302 | }\r | |
303 | \r | |
304 | CoreFreePool (DecompressGuidList);\r | |
305 | \r | |
28a00297 | 306 | return Status;\r |
307 | }\r | |
308 | \r | |
309 | STATIC\r | |
310 | EFI_STATUS\r | |
311 | EFIAPI\r | |
312 | OpenSectionStream (\r | |
313 | IN EFI_SECTION_EXTRACTION_PROTOCOL *This,\r | |
314 | IN UINTN SectionStreamLength,\r | |
315 | IN VOID *SectionStream,\r | |
316 | OUT UINTN *SectionStreamHandle\r | |
317 | )\r | |
318 | /*++\r | |
319 | \r | |
320 | Routine Description:\r | |
321 | SEP member function. This function creates and returns a new section stream\r | |
322 | handle to represent the new section stream.\r | |
323 | \r | |
324 | Arguments:\r | |
325 | This - Indicates the calling context.\r | |
326 | SectionStreamLength - Size in bytes of the section stream.\r | |
327 | SectionStream - Buffer containing the new section stream.\r | |
328 | SectionStreamHandle - A pointer to a caller allocated UINTN that on output\r | |
329 | contains the new section stream handle.\r | |
330 | \r | |
331 | Returns:\r | |
332 | EFI_SUCCESS\r | |
333 | EFI_OUT_OF_RESOURCES - memory allocation failed.\r | |
334 | EFI_INVALID_PARAMETER - section stream does not end concident with end of\r | |
335 | last section.\r | |
336 | \r | |
337 | --*/\r | |
338 | {\r | |
339 | //\r | |
340 | // Check to see section stream looks good...\r | |
341 | //\r | |
342 | if (!IsValidSectionStream (SectionStream, SectionStreamLength)) {\r | |
343 | return EFI_INVALID_PARAMETER;\r | |
344 | }\r | |
345 | \r | |
346 | return OpenSectionStreamEx ( \r | |
347 | SectionStreamLength, \r | |
348 | SectionStream,\r | |
349 | TRUE,\r | |
350 | 0,\r | |
351 | SectionStreamHandle\r | |
352 | );\r | |
353 | }\r | |
354 | \r | |
355 | STATIC\r | |
356 | EFI_STATUS\r | |
357 | EFIAPI\r | |
358 | GetSection (\r | |
359 | IN EFI_SECTION_EXTRACTION_PROTOCOL *This,\r | |
360 | IN UINTN SectionStreamHandle,\r | |
361 | IN EFI_SECTION_TYPE *SectionType,\r | |
362 | IN EFI_GUID *SectionDefinitionGuid,\r | |
363 | IN UINTN SectionInstance,\r | |
364 | IN VOID **Buffer,\r | |
365 | IN OUT UINTN *BufferSize,\r | |
366 | OUT UINT32 *AuthenticationStatus\r | |
367 | )\r | |
368 | /*++\r | |
369 | \r | |
370 | Routine Description:\r | |
371 | SEP member function. Retrieves requested section from section stream.\r | |
372 | \r | |
373 | Arguments: \r | |
374 | This: Pointer to SEP instance.\r | |
375 | SectionStreamHandle: The section stream from which to extract the requested\r | |
376 | section.\r | |
377 | SectionType: A pointer to the type of section to search for.\r | |
378 | SectionDefinitionGuid: If the section type is EFI_SECTION_GUID_DEFINED, then\r | |
379 | SectionDefinitionGuid indicates which of these types\r | |
380 | of sections to search for.\r | |
381 | SectionInstance: Indicates which instance of the requested section to\r | |
382 | return.\r | |
383 | Buffer: Double indirection to buffer. If *Buffer is non-null on\r | |
384 | input, then the buffer is caller allocated. If\r | |
385 | *Buffer is NULL, then the buffer is callee allocated.\r | |
386 | In either case, the requried buffer size is returned\r | |
387 | in *BufferSize.\r | |
388 | BufferSize: On input, indicates the size of *Buffer if *Buffer is\r | |
389 | non-null on input. On output, indicates the required\r | |
390 | size (allocated size if callee allocated) of *Buffer.\r | |
391 | AuthenticationStatus: Indicates the authentication status of the retrieved\r | |
392 | section.\r | |
393 | \r | |
394 | Returns: \r | |
395 | EFI_SUCCESS: Section was retrieved successfully\r | |
396 | EFI_PROTOCOL_ERROR: A GUID defined section was encountered in the section \r | |
397 | stream with its EFI_GUIDED_SECTION_PROCESSING_REQUIRED\r | |
398 | bit set, but there was no corresponding GUIDed Section \r | |
399 | Extraction Protocol in the handle database. *Buffer is \r | |
400 | unmodified.\r | |
401 | EFI_NOT_FOUND: An error was encountered when parsing the SectionStream.\r | |
402 | This indicates the SectionStream is not correctly \r | |
403 | formatted.\r | |
404 | EFI_NOT_FOUND: The requested section does not exist.\r | |
405 | EFI_OUT_OF_RESOURCES: The system has insufficient resources to process the \r | |
406 | request.\r | |
407 | EFI_INVALID_PARAMETER: The SectionStreamHandle does not exist.\r | |
408 | EFI_WARN_TOO_SMALL: The size of the caller allocated input buffer is \r | |
409 | insufficient to contain the requested section. The \r | |
410 | input buffer is filled and contents are section contents\r | |
411 | are truncated.\r | |
412 | \r | |
413 | --*/\r | |
414 | {\r | |
415 | CORE_SECTION_STREAM_NODE *StreamNode;\r | |
416 | EFI_TPL OldTpl;\r | |
417 | EFI_STATUS Status;\r | |
418 | CORE_SECTION_CHILD_NODE *ChildNode;\r | |
419 | CORE_SECTION_STREAM_NODE *ChildStreamNode;\r | |
420 | UINTN CopySize;\r | |
421 | UINT32 ExtractedAuthenticationStatus;\r | |
422 | UINTN Instance;\r | |
423 | UINT8 *CopyBuffer;\r | |
424 | UINTN SectionSize;\r | |
425 | \r | |
426 | \r | |
427 | OldTpl = CoreRaiseTpl (TPL_NOTIFY);\r | |
428 | Instance = SectionInstance + 1;\r | |
429 | \r | |
430 | //\r | |
431 | // Locate target stream\r | |
432 | //\r | |
433 | Status = FindStreamNode (SectionStreamHandle, &StreamNode);\r | |
434 | if (EFI_ERROR (Status)) {\r | |
435 | Status = EFI_INVALID_PARAMETER;\r | |
436 | goto GetSection_Done;\r | |
437 | }\r | |
438 | \r | |
439 | //\r | |
440 | // Found the stream, now locate and return the appropriate section\r | |
441 | //\r | |
442 | if (SectionType == NULL) {\r | |
443 | //\r | |
444 | // SectionType == NULL means return the WHOLE section stream...\r | |
445 | //\r | |
446 | CopySize = StreamNode->StreamLength;\r | |
447 | CopyBuffer = StreamNode->StreamBuffer;\r | |
448 | *AuthenticationStatus = StreamNode->AuthenticationStatus;\r | |
449 | } else {\r | |
450 | //\r | |
451 | // There's a requested section type, so go find it and return it...\r | |
452 | //\r | |
453 | Status = FindChildNode (\r | |
454 | StreamNode, \r | |
455 | *SectionType, \r | |
456 | &Instance, \r | |
457 | SectionDefinitionGuid,\r | |
458 | &ChildNode,\r | |
459 | &ChildStreamNode, \r | |
460 | &ExtractedAuthenticationStatus\r | |
461 | );\r | |
462 | if (EFI_ERROR (Status)) {\r | |
463 | goto GetSection_Done;\r | |
464 | }\r | |
465 | CopySize = ChildNode->Size - sizeof (EFI_COMMON_SECTION_HEADER);\r | |
466 | CopyBuffer = ChildStreamNode->StreamBuffer + ChildNode->OffsetInStream + sizeof (EFI_COMMON_SECTION_HEADER);\r | |
467 | *AuthenticationStatus = ExtractedAuthenticationStatus;\r | |
468 | } \r | |
469 | \r | |
470 | SectionSize = CopySize; \r | |
471 | if (*Buffer != NULL) {\r | |
472 | //\r | |
473 | // Caller allocated buffer. Fill to size and return required size...\r | |
474 | //\r | |
475 | if (*BufferSize < CopySize) {\r | |
476 | Status = EFI_WARN_BUFFER_TOO_SMALL;\r | |
477 | CopySize = *BufferSize;\r | |
478 | }\r | |
479 | } else {\r | |
480 | //\r | |
481 | // Callee allocated buffer. Allocate buffer and return size.\r | |
482 | //\r | |
483 | *Buffer = CoreAllocateBootServicesPool (CopySize);\r | |
484 | if (*Buffer == NULL) {\r | |
485 | Status = EFI_OUT_OF_RESOURCES;\r | |
486 | goto GetSection_Done;\r | |
487 | }\r | |
488 | }\r | |
489 | CopyMem (*Buffer, CopyBuffer, CopySize);\r | |
490 | *BufferSize = SectionSize;\r | |
491 | \r | |
492 | GetSection_Done:\r | |
493 | CoreRestoreTpl (OldTpl);\r | |
494 | return Status;\r | |
495 | }\r | |
496 | \r | |
497 | \r | |
498 | STATIC\r | |
499 | EFI_STATUS\r | |
500 | EFIAPI\r | |
501 | CloseSectionStream (\r | |
502 | IN EFI_SECTION_EXTRACTION_PROTOCOL *This,\r | |
503 | IN UINTN StreamHandleToClose\r | |
504 | )\r | |
505 | /*++\r | |
506 | \r | |
507 | Routine Description:\r | |
508 | SEP member function. Deletes an existing section stream\r | |
509 | \r | |
510 | Arguments:\r | |
511 | This - Indicates the calling context.\r | |
512 | StreamHandleToClose - Indicates the stream to close\r | |
513 | \r | |
514 | Returns:\r | |
515 | EFI_SUCCESS\r | |
516 | EFI_OUT_OF_RESOURCES - memory allocation failed.\r | |
517 | EFI_INVALID_PARAMETER - section stream does not end concident with end of\r | |
518 | last section.\r | |
519 | \r | |
520 | --*/\r | |
521 | {\r | |
522 | CORE_SECTION_STREAM_NODE *StreamNode;\r | |
523 | EFI_TPL OldTpl;\r | |
524 | EFI_STATUS Status;\r | |
525 | LIST_ENTRY *Link;\r | |
526 | CORE_SECTION_CHILD_NODE *ChildNode;\r | |
527 | \r | |
528 | OldTpl = CoreRaiseTpl (TPL_NOTIFY);\r | |
529 | \r | |
530 | //\r | |
531 | // Locate target stream\r | |
532 | //\r | |
533 | Status = FindStreamNode (StreamHandleToClose, &StreamNode);\r | |
534 | if (!EFI_ERROR (Status)) {\r | |
535 | //\r | |
536 | // Found the stream, so close it\r | |
537 | //\r | |
538 | RemoveEntryList (&StreamNode->Link);\r | |
539 | while (!IsListEmpty (&StreamNode->Children)) {\r | |
540 | Link = GetFirstNode (&StreamNode->Children);\r | |
541 | ChildNode = CHILD_SECTION_NODE_FROM_LINK (Link);\r | |
542 | FreeChildNode (ChildNode);\r | |
543 | }\r | |
544 | CoreFreePool (StreamNode->StreamBuffer);\r | |
545 | CoreFreePool (StreamNode);\r | |
546 | Status = EFI_SUCCESS;\r | |
547 | } else {\r | |
548 | Status = EFI_INVALID_PARAMETER;\r | |
549 | }\r | |
550 | \r | |
551 | CoreRestoreTpl (OldTpl);\r | |
552 | return Status;\r | |
553 | }\r | |
554 | \r | |
555 | \r | |
556 | STATIC\r | |
557 | BOOLEAN\r | |
558 | ChildIsType (\r | |
559 | IN CORE_SECTION_STREAM_NODE *Stream,\r | |
560 | IN CORE_SECTION_CHILD_NODE *Child,\r | |
561 | IN EFI_SECTION_TYPE SearchType,\r | |
562 | IN EFI_GUID *SectionDefinitionGuid\r | |
563 | )\r | |
564 | /*++\r | |
565 | \r | |
566 | Routine Description:\r | |
567 | Worker function. Determine if the input stream:child matches the input type.\r | |
568 | \r | |
569 | Arguments:\r | |
570 | Stream - Indicates the section stream associated with the child\r | |
571 | Child - Indicates the child to check\r | |
572 | SearchType - Indicates the type of section to check against for\r | |
573 | SectionDefinitionGuid - Indicates the GUID to check against if the type is\r | |
574 | EFI_SECTION_GUID_DEFINED\r | |
575 | Returns:\r | |
576 | TRUE - The child matches\r | |
577 | FALSE - The child doesn't match\r | |
578 | \r | |
579 | --*/\r | |
580 | {\r | |
581 | EFI_GUID_DEFINED_SECTION *GuidedSection;\r | |
582 | \r | |
583 | if (SearchType == EFI_SECTION_ALL) {\r | |
584 | return TRUE;\r | |
585 | }\r | |
586 | if (Child->Type != SearchType) {\r | |
587 | return FALSE;\r | |
588 | }\r | |
589 | if (SearchType != EFI_SECTION_GUID_DEFINED) {\r | |
590 | return TRUE;\r | |
591 | }\r | |
592 | GuidedSection = (EFI_GUID_DEFINED_SECTION * )(Stream->StreamBuffer + Child->OffsetInStream);\r | |
593 | return CompareGuid (&GuidedSection->SectionDefinitionGuid, SectionDefinitionGuid);\r | |
594 | }\r | |
595 | \r | |
596 | \r | |
597 | STATIC\r | |
598 | EFI_STATUS\r | |
599 | FindChildNode (\r | |
600 | IN CORE_SECTION_STREAM_NODE *SourceStream,\r | |
601 | IN EFI_SECTION_TYPE SearchType,\r | |
602 | IN OUT UINTN *SectionInstance,\r | |
603 | IN EFI_GUID *SectionDefinitionGuid,\r | |
604 | OUT CORE_SECTION_CHILD_NODE **FoundChild,\r | |
605 | OUT CORE_SECTION_STREAM_NODE **FoundStream,\r | |
606 | OUT UINT32 *AuthenticationStatus\r | |
607 | )\r | |
608 | /*++\r | |
609 | \r | |
610 | Routine Description:\r | |
611 | Worker function Recursively searches / builds section stream database\r | |
612 | looking for requested section.\r | |
613 | \r | |
614 | Arguments:\r | |
615 | SourceStream - Indicates the section stream in which to do the search.\r | |
616 | SearchType - Indicates the type of section to search for.\r | |
617 | SectionInstance - Indicates which instance of section to find. This is\r | |
618 | an in/out parameter to deal with recursions.\r | |
619 | SectionDefinitionGuid - Guid of section definition\r | |
620 | FoundChild - Output indicating the child node that is found.\r | |
621 | FoundStream - Output indicating which section stream the child was\r | |
622 | found in. If this stream was generated as a result of\r | |
623 | an encapsulation section, the streamhandle is visible\r | |
624 | within the SEP driver only.\r | |
625 | AuthenticationStatus- Indicates the authentication status of the found section.\r | |
626 | \r | |
627 | Returns:\r | |
628 | EFI_SUCCESS - Child node was found and returned.\r | |
629 | EFI_OUT_OF_RESOURCES- Memory allocation failed.\r | |
630 | EFI_NOT_FOUND - Requested child node does not exist.\r | |
631 | EFI_PROTOCOL_ERROR - a required GUIDED section extraction protocol does not\r | |
632 | exist\r | |
633 | \r | |
634 | --*/\r | |
635 | {\r | |
636 | CORE_SECTION_CHILD_NODE *CurrentChildNode;\r | |
637 | CORE_SECTION_CHILD_NODE *RecursedChildNode;\r | |
638 | CORE_SECTION_STREAM_NODE *RecursedFoundStream;\r | |
639 | UINT32 NextChildOffset;\r | |
640 | EFI_STATUS ErrorStatus;\r | |
641 | EFI_STATUS Status;\r | |
642 | \r | |
643 | CurrentChildNode = NULL;\r | |
644 | ErrorStatus = EFI_NOT_FOUND;\r | |
645 | \r | |
646 | if (SourceStream->StreamLength == 0) {\r | |
647 | return EFI_NOT_FOUND;\r | |
648 | }\r | |
649 | \r | |
650 | if (IsListEmpty (&SourceStream->Children) && \r | |
651 | SourceStream->StreamLength > sizeof (EFI_COMMON_SECTION_HEADER)) {\r | |
652 | //\r | |
653 | // This occurs when a section stream exists, but no child sections\r | |
654 | // have been parsed out yet. Therefore, extract the first child and add it\r | |
655 | // to the list of children so we can get started.\r | |
656 | //\r | |
657 | Status = CreateChildNode (SourceStream, 0, &CurrentChildNode);\r | |
658 | if (EFI_ERROR (Status)) {\r | |
659 | return Status;\r | |
660 | }\r | |
661 | }\r | |
662 | \r | |
663 | //\r | |
664 | // At least one child has been parsed out of the section stream. So, walk\r | |
665 | // through the sections that have already been parsed out looking for the\r | |
666 | // requested section, if necessary, continue parsing section stream and\r | |
667 | // adding children until either the requested section is found, or we run\r | |
668 | // out of data\r | |
669 | //\r | |
670 | CurrentChildNode = CHILD_SECTION_NODE_FROM_LINK (GetFirstNode(&SourceStream->Children));\r | |
671 | \r | |
672 | for (;;) {\r | |
673 | if (ChildIsType (SourceStream, CurrentChildNode, SearchType, SectionDefinitionGuid)) {\r | |
674 | //\r | |
675 | // The type matches, so check the instance count to see if it's the one we want\r | |
676 | //\r | |
677 | (*SectionInstance)--;\r | |
678 | if (*SectionInstance == 0) {\r | |
679 | //\r | |
680 | // Got it!\r | |
681 | //\r | |
682 | *FoundChild = CurrentChildNode;\r | |
683 | *FoundStream = SourceStream;\r | |
684 | *AuthenticationStatus = SourceStream->AuthenticationStatus;\r | |
685 | return EFI_SUCCESS;\r | |
686 | }\r | |
687 | }\r | |
688 | \r | |
689 | if (CurrentChildNode->EncapsulatedStreamHandle != NULL_STREAM_HANDLE) {\r | |
690 | //\r | |
691 | // If the current node is an encapsulating node, recurse into it...\r | |
692 | //\r | |
693 | Status = FindChildNode (\r | |
694 | (CORE_SECTION_STREAM_NODE *)CurrentChildNode->EncapsulatedStreamHandle,\r | |
695 | SearchType,\r | |
696 | SectionInstance,\r | |
697 | SectionDefinitionGuid,\r | |
698 | &RecursedChildNode,\r | |
699 | &RecursedFoundStream,\r | |
700 | AuthenticationStatus\r | |
701 | );\r | |
702 | //\r | |
703 | // If the status is not EFI_SUCCESS, just save the error code and continue\r | |
704 | // to find the request child node in the rest stream.\r | |
705 | //\r | |
706 | if (*SectionInstance == 0) {\r | |
707 | ASSERT_EFI_ERROR (Status);\r | |
708 | *FoundChild = RecursedChildNode;\r | |
709 | *FoundStream = RecursedFoundStream;\r | |
710 | return EFI_SUCCESS;\r | |
711 | } else {\r | |
712 | ErrorStatus = Status;\r | |
713 | }\r | |
714 | }\r | |
715 | \r | |
716 | if (!IsNodeAtEnd (&SourceStream->Children, &CurrentChildNode->Link)) {\r | |
717 | //\r | |
718 | // We haven't found the child node we're interested in yet, but there's\r | |
719 | // still more nodes that have already been parsed so get the next one\r | |
720 | // and continue searching..\r | |
721 | //\r | |
722 | CurrentChildNode = CHILD_SECTION_NODE_FROM_LINK (GetNextNode (&SourceStream->Children, &CurrentChildNode->Link));\r | |
723 | } else {\r | |
724 | //\r | |
725 | // We've exhausted children that have already been parsed, so see if\r | |
726 | // there's any more data and continue parsing out more children if there\r | |
727 | // is.\r | |
728 | //\r | |
729 | NextChildOffset = CurrentChildNode->OffsetInStream + CurrentChildNode->Size;\r | |
730 | //\r | |
731 | // Round up to 4 byte boundary\r | |
732 | //\r | |
733 | NextChildOffset += 3;\r | |
734 | NextChildOffset &= ~(UINTN)3;\r | |
735 | if (NextChildOffset <= SourceStream->StreamLength - sizeof (EFI_COMMON_SECTION_HEADER)) {\r | |
736 | //\r | |
737 | // There's an unparsed child remaining in the stream, so create a new child node\r | |
738 | //\r | |
739 | Status = CreateChildNode (SourceStream, NextChildOffset, &CurrentChildNode);\r | |
740 | if (EFI_ERROR (Status)) {\r | |
741 | return Status;\r | |
742 | }\r | |
743 | } else {\r | |
744 | ASSERT (EFI_ERROR (ErrorStatus));\r | |
745 | return ErrorStatus;\r | |
746 | }\r | |
747 | }\r | |
748 | }\r | |
749 | }\r | |
750 | \r | |
751 | \r | |
752 | STATIC\r | |
753 | EFI_STATUS\r | |
754 | CreateChildNode (\r | |
755 | IN CORE_SECTION_STREAM_NODE *Stream,\r | |
756 | IN UINT32 ChildOffset,\r | |
757 | OUT CORE_SECTION_CHILD_NODE **ChildNode\r | |
758 | )\r | |
759 | /*++\r | |
760 | \r | |
761 | Routine Description:\r | |
762 | Worker function. Constructor for new child nodes.\r | |
763 | \r | |
764 | Arguments:\r | |
765 | Stream - Indicates the section stream in which to add the child.\r | |
766 | ChildOffset - Indicates the offset in Stream that is the beginning\r | |
767 | of the child section.\r | |
768 | ChildNode - Indicates the Callee allocated and initialized child.\r | |
769 | \r | |
770 | Returns:\r | |
771 | EFI_SUCCESS - Child node was found and returned.\r | |
772 | EFI_OUT_OF_RESOURCES- Memory allocation failed.\r | |
773 | EFI_PROTOCOL_ERROR - Encapsulation sections produce new stream handles when\r | |
774 | the child node is created. If the section type is GUID\r | |
775 | defined, and the extraction GUID does not exist, and\r | |
776 | producing the stream requires the GUID, then a protocol\r | |
777 | error is generated and no child is produced.\r | |
778 | Values returned by OpenSectionStreamEx.\r | |
779 | \r | |
780 | --*/\r | |
781 | {\r | |
782 | EFI_STATUS Status;\r | |
783 | EFI_COMMON_SECTION_HEADER *SectionHeader;\r | |
784 | EFI_COMPRESSION_SECTION *CompressionHeader;\r | |
785 | EFI_GUID_DEFINED_SECTION *GuidedHeader;\r | |
d8c79a81 | 786 | EFI_DECOMPRESS_PROTOCOL *Decompress;\r |
28a00297 | 787 | EFI_GUIDED_SECTION_EXTRACTION_PROTOCOL *GuidedExtraction;\r |
788 | VOID *NewStreamBuffer;\r | |
789 | VOID *ScratchBuffer;\r | |
790 | UINT32 ScratchSize;\r | |
791 | UINTN NewStreamBufferSize;\r | |
792 | UINT32 AuthenticationStatus;\r | |
793 | UINT32 SectionLength;\r | |
794 | \r | |
795 | CORE_SECTION_CHILD_NODE *Node;\r | |
796 | \r | |
797 | SectionHeader = (EFI_COMMON_SECTION_HEADER *) (Stream->StreamBuffer + ChildOffset);\r | |
798 | \r | |
799 | //\r | |
800 | // Allocate a new node\r | |
801 | //\r | |
802 | *ChildNode = CoreAllocateBootServicesPool (sizeof (CORE_SECTION_CHILD_NODE));\r | |
803 | Node = *ChildNode;\r | |
804 | if (Node == NULL) {\r | |
805 | return EFI_OUT_OF_RESOURCES;\r | |
806 | }\r | |
807 | \r | |
808 | //\r | |
809 | // Now initialize it\r | |
810 | //\r | |
811 | Node->Signature = CORE_SECTION_CHILD_SIGNATURE;\r | |
812 | Node->Type = SectionHeader->Type;\r | |
813 | Node->Size = SECTION_SIZE (SectionHeader);\r | |
814 | Node->OffsetInStream = ChildOffset;\r | |
815 | Node->EncapsulatedStreamHandle = NULL_STREAM_HANDLE;\r | |
816 | Node->EncapsulationGuid = NULL;\r | |
817 | \r | |
818 | //\r | |
819 | // If it's an encapsulating section, then create the new section stream also\r | |
820 | //\r | |
821 | switch (Node->Type) {\r | |
822 | case EFI_SECTION_COMPRESSION:\r | |
823 | //\r | |
824 | // Get the CompressionSectionHeader\r | |
825 | //\r | |
826 | ASSERT (Node->Size >= sizeof (EFI_COMPRESSION_SECTION));\r | |
827 | \r | |
828 | CompressionHeader = (EFI_COMPRESSION_SECTION *) SectionHeader;\r | |
829 | \r | |
830 | //\r | |
831 | // Allocate space for the new stream\r | |
832 | //\r | |
833 | if (CompressionHeader->UncompressedLength > 0) {\r | |
834 | NewStreamBufferSize = CompressionHeader->UncompressedLength;\r | |
835 | NewStreamBuffer = CoreAllocateBootServicesPool (NewStreamBufferSize);\r | |
836 | if (NewStreamBuffer == NULL) {\r | |
837 | CoreFreePool (Node);\r | |
838 | return EFI_OUT_OF_RESOURCES;\r | |
839 | }\r | |
840 | \r | |
841 | if (CompressionHeader->CompressionType == EFI_NOT_COMPRESSED) {\r | |
842 | //\r | |
843 | // stream is not actually compressed, just encapsulated. So just copy it.\r | |
844 | //\r | |
845 | CopyMem (NewStreamBuffer, CompressionHeader + 1, NewStreamBufferSize);\r | |
846 | } else if (CompressionHeader->CompressionType == EFI_STANDARD_COMPRESSION) {\r | |
847 | //\r | |
848 | // Only support the EFI_SATNDARD_COMPRESSION algorithm.\r | |
849 | // \r | |
850 | \r | |
851 | //\r | |
852 | // Decompress the stream\r | |
853 | //\r | |
854 | Status = CoreLocateProtocol (&gEfiDecompressProtocolGuid, NULL, (VOID **)&Decompress);\r | |
855 | \r | |
856 | ASSERT_EFI_ERROR (Status);\r | |
857 | \r | |
858 | Status = Decompress->GetInfo (\r | |
859 | Decompress,\r | |
860 | CompressionHeader + 1,\r | |
861 | Node->Size - sizeof (EFI_COMPRESSION_SECTION),\r | |
862 | (UINT32 *)&NewStreamBufferSize,\r | |
863 | &ScratchSize\r | |
864 | );\r | |
865 | ASSERT_EFI_ERROR (Status);\r | |
866 | ASSERT (NewStreamBufferSize == CompressionHeader->UncompressedLength);\r | |
867 | \r | |
868 | ScratchBuffer = CoreAllocateBootServicesPool (ScratchSize);\r | |
869 | if (ScratchBuffer == NULL) {\r | |
870 | CoreFreePool (Node);\r | |
871 | CoreFreePool (NewStreamBuffer);\r | |
872 | return EFI_OUT_OF_RESOURCES;\r | |
873 | }\r | |
874 | \r | |
875 | Status = Decompress->Decompress (\r | |
876 | Decompress,\r | |
877 | CompressionHeader + 1,\r | |
878 | Node->Size - sizeof (EFI_COMPRESSION_SECTION),\r | |
879 | NewStreamBuffer,\r | |
880 | (UINT32)NewStreamBufferSize,\r | |
881 | ScratchBuffer,\r | |
882 | ScratchSize\r | |
883 | );\r | |
884 | ASSERT_EFI_ERROR (Status);\r | |
885 | CoreFreePool (ScratchBuffer); \r | |
886 | }\r | |
887 | } else {\r | |
888 | NewStreamBuffer = NULL;\r | |
889 | NewStreamBufferSize = 0;\r | |
890 | }\r | |
891 | \r | |
892 | Status = OpenSectionStreamEx (\r | |
893 | NewStreamBufferSize,\r | |
894 | NewStreamBuffer,\r | |
895 | FALSE,\r | |
896 | Stream->AuthenticationStatus,\r | |
897 | &Node->EncapsulatedStreamHandle\r | |
898 | );\r | |
899 | if (EFI_ERROR (Status)) {\r | |
900 | CoreFreePool (Node);\r | |
901 | CoreFreePool (NewStreamBuffer);\r | |
902 | return Status;\r | |
903 | }\r | |
904 | break;\r | |
905 | \r | |
906 | case EFI_SECTION_GUID_DEFINED:\r | |
907 | GuidedHeader = (EFI_GUID_DEFINED_SECTION *) SectionHeader;\r | |
908 | Node->EncapsulationGuid = &GuidedHeader->SectionDefinitionGuid;\r | |
909 | Status = CoreLocateProtocol (Node->EncapsulationGuid, NULL, (VOID **)&GuidedExtraction);\r | |
910 | if (!EFI_ERROR (Status)) {\r | |
911 | //\r | |
912 | // NewStreamBuffer is always allocated by ExtractSection... No caller\r | |
913 | // allocation here.\r | |
914 | //\r | |
915 | Status = GuidedExtraction->ExtractSection (\r | |
916 | GuidedExtraction,\r | |
917 | GuidedHeader,\r | |
918 | &NewStreamBuffer,\r | |
919 | &NewStreamBufferSize,\r | |
920 | &AuthenticationStatus\r | |
921 | );\r | |
922 | if (EFI_ERROR (Status)) {\r | |
923 | CoreFreePool (*ChildNode);\r | |
924 | return EFI_PROTOCOL_ERROR;\r | |
925 | }\r | |
926 | \r | |
927 | //\r | |
928 | // Make sure we initialize the new stream with the correct \r | |
929 | // authentication status for both aggregate and local status fields.\r | |
930 | //\r | |
931 | if (GuidedHeader->Attributes & EFI_GUIDED_SECTION_AUTH_STATUS_VALID) {\r | |
932 | //\r | |
933 | // OR in the parent stream's aggregate status.\r | |
934 | //\r | |
935 | AuthenticationStatus |= Stream->AuthenticationStatus & EFI_AGGREGATE_AUTH_STATUS_ALL;\r | |
936 | } else {\r | |
937 | //\r | |
938 | // since there's no authentication data contributed by the section,\r | |
939 | // just inherit the full value from our immediate parent.\r | |
940 | //\r | |
941 | AuthenticationStatus = Stream->AuthenticationStatus;\r | |
942 | }\r | |
943 | \r | |
944 | Status = OpenSectionStreamEx (\r | |
945 | NewStreamBufferSize,\r | |
946 | NewStreamBuffer,\r | |
947 | FALSE,\r | |
948 | AuthenticationStatus,\r | |
949 | &Node->EncapsulatedStreamHandle\r | |
950 | );\r | |
951 | if (EFI_ERROR (Status)) {\r | |
952 | CoreFreePool (*ChildNode);\r | |
953 | CoreFreePool (NewStreamBuffer);\r | |
954 | return Status;\r | |
955 | }\r | |
956 | } else {\r | |
957 | //\r | |
958 | // There's no GUIDed section extraction protocol available.\r | |
959 | //\r | |
960 | if (GuidedHeader->Attributes & EFI_GUIDED_SECTION_PROCESSING_REQUIRED) {\r | |
961 | //\r | |
962 | // If the section REQUIRES an extraction protocol, then we're toast\r | |
963 | //\r | |
964 | CoreFreePool (*ChildNode);\r | |
965 | return EFI_PROTOCOL_ERROR;\r | |
966 | }\r | |
967 | \r | |
968 | //\r | |
969 | // Figure out the proper authentication status\r | |
970 | //\r | |
971 | AuthenticationStatus = Stream->AuthenticationStatus;\r | |
972 | if (GuidedHeader->Attributes & EFI_GUIDED_SECTION_AUTH_STATUS_VALID) {\r | |
973 | //\r | |
974 | // The local status of the new stream is contained in \r | |
975 | // AuthenticaionStatus. This value needs to be ORed into the\r | |
976 | // Aggregate bits also...\r | |
977 | //\r | |
978 | \r | |
979 | //\r | |
980 | // Clear out and initialize the local status\r | |
981 | //\r | |
982 | AuthenticationStatus &= ~EFI_LOCAL_AUTH_STATUS_ALL;\r | |
983 | AuthenticationStatus |= EFI_LOCAL_AUTH_STATUS_IMAGE_SIGNED | EFI_LOCAL_AUTH_STATUS_NOT_TESTED;\r | |
984 | //\r | |
985 | // OR local status into aggregate status\r | |
986 | //\r | |
987 | AuthenticationStatus |= AuthenticationStatus >> 16;\r | |
988 | }\r | |
989 | \r | |
990 | SectionLength = SECTION_SIZE (GuidedHeader);\r | |
991 | Status = OpenSectionStreamEx (\r | |
992 | SectionLength - GuidedHeader->DataOffset,\r | |
993 | (UINT8 *) GuidedHeader + GuidedHeader->DataOffset,\r | |
994 | TRUE,\r | |
995 | AuthenticationStatus,\r | |
996 | &Node->EncapsulatedStreamHandle\r | |
997 | );\r | |
998 | if (EFI_ERROR (Status)) {\r | |
999 | CoreFreePool (Node);\r | |
1000 | return Status;\r | |
1001 | }\r | |
1002 | }\r | |
1003 | \r | |
1004 | if ((AuthenticationStatus & EFI_LOCAL_AUTH_STATUS_ALL) == \r | |
1005 | (EFI_LOCAL_AUTH_STATUS_IMAGE_SIGNED | EFI_LOCAL_AUTH_STATUS_NOT_TESTED)) {\r | |
1006 | //\r | |
1007 | // Need to register for RPN for when the required GUIDed extraction\r | |
1008 | // protocol becomes available. This will enable us to refresh the\r | |
1009 | // AuthenticationStatus cached in the Stream if it's ever requested\r | |
1010 | // again.\r | |
1011 | //\r | |
1012 | CreateGuidedExtractionRpnEvent (Stream, Node);\r | |
1013 | }\r | |
1014 | \r | |
1015 | break;\r | |
1016 | \r | |
1017 | default:\r | |
1018 | \r | |
1019 | //\r | |
1020 | // Nothing to do if it's a leaf\r | |
1021 | //\r | |
1022 | break;\r | |
1023 | }\r | |
1024 | \r | |
1025 | //\r | |
1026 | // Last, add the new child node to the stream\r | |
1027 | //\r | |
1028 | InsertTailList (&Stream->Children, &Node->Link);\r | |
1029 | \r | |
1030 | return EFI_SUCCESS;\r | |
1031 | }\r | |
1032 | \r | |
1033 | \r | |
1034 | STATIC\r | |
1035 | VOID\r | |
1036 | CreateGuidedExtractionRpnEvent (\r | |
1037 | IN CORE_SECTION_STREAM_NODE *ParentStream,\r | |
1038 | IN CORE_SECTION_CHILD_NODE *ChildNode\r | |
1039 | )\r | |
1040 | /*++\r | |
1041 | \r | |
1042 | Routine Description:\r | |
1043 | Worker function. Constructor for RPN event if needed to keep AuthenticationStatus\r | |
1044 | cache correct when a missing GUIDED_SECTION_EXTRACTION_PROTOCOL appears...\r | |
1045 | \r | |
1046 | Arguments:\r | |
1047 | ParentStream - Indicates the parent of the ecnapsulation section (child)\r | |
1048 | ChildNode - Indicates the child node that is the encapsulation section.\r | |
1049 | \r | |
1050 | Returns:\r | |
1051 | None\r | |
1052 | \r | |
1053 | --*/\r | |
1054 | {\r | |
1055 | RPN_EVENT_CONTEXT *Context;\r | |
1056 | \r | |
1057 | //\r | |
1058 | // Allocate new event structure and context\r | |
1059 | //\r | |
1060 | Context = CoreAllocateBootServicesPool (sizeof (RPN_EVENT_CONTEXT));\r | |
1061 | ASSERT (Context != NULL);\r | |
1062 | \r | |
1063 | Context->ChildNode = ChildNode;\r | |
1064 | Context->ParentStream = ParentStream;\r | |
1065 | \r | |
1066 | Context->Event = CoreCreateProtocolNotifyEvent (\r | |
1067 | Context->ChildNode->EncapsulationGuid,\r | |
1068 | TPL_NOTIFY,\r | |
1069 | NotifyGuidedExtraction,\r | |
1070 | Context,\r | |
1071 | &Context->Registration,\r | |
1072 | FALSE\r | |
1073 | );\r | |
1074 | }\r | |
1075 | \r | |
1076 | \r | |
1077 | STATIC\r | |
1078 | VOID\r | |
1079 | EFIAPI\r | |
1080 | NotifyGuidedExtraction (\r | |
1081 | IN EFI_EVENT Event,\r | |
1082 | IN VOID *RpnContext\r | |
1083 | )\r | |
1084 | /*++\r | |
1085 | \r | |
1086 | Routine Description:\r | |
1087 | RPN callback function. Removes a stale section stream and re-initializes it\r | |
1088 | with an updated AuthenticationStatus.\r | |
1089 | \r | |
1090 | Arguments:\r | |
1091 | Event - The event that fired\r | |
1092 | RpnContext - A pointer to the context that allows us to identify\r | |
1093 | the relevent encapsulation...\r | |
1094 | \r | |
1095 | Returns:\r | |
1096 | None\r | |
1097 | \r | |
1098 | --*/\r | |
1099 | {\r | |
1100 | EFI_STATUS Status;\r | |
1101 | EFI_GUID_DEFINED_SECTION *GuidedHeader;\r | |
1102 | EFI_GUIDED_SECTION_EXTRACTION_PROTOCOL *GuidedExtraction;\r | |
1103 | VOID *NewStreamBuffer;\r | |
1104 | UINTN NewStreamBufferSize;\r | |
1105 | UINT32 AuthenticationStatus;\r | |
1106 | RPN_EVENT_CONTEXT *Context;\r | |
1107 | \r | |
1108 | Context = RpnContext;\r | |
1109 | \r | |
1110 | Status = CloseSectionStream (&mSectionExtraction, Context->ChildNode->EncapsulatedStreamHandle);\r | |
1111 | if (!EFI_ERROR (Status)) {\r | |
1112 | //\r | |
1113 | // The stream closed successfully, so re-open the stream with correct AuthenticationStatus\r | |
1114 | //\r | |
1115 | \r | |
1116 | GuidedHeader = (EFI_GUID_DEFINED_SECTION *) \r | |
1117 | (Context->ParentStream->StreamBuffer + Context->ChildNode->OffsetInStream);\r | |
1118 | ASSERT (GuidedHeader->CommonHeader.Type == EFI_SECTION_GUID_DEFINED);\r | |
1119 | \r | |
1120 | Status = CoreLocateProtocol (Context->ChildNode->EncapsulationGuid, NULL, (VOID **)&GuidedExtraction);\r | |
1121 | ASSERT_EFI_ERROR (Status);\r | |
1122 | \r | |
1123 | \r | |
1124 | Status = GuidedExtraction->ExtractSection (\r | |
1125 | GuidedExtraction,\r | |
1126 | GuidedHeader,\r | |
1127 | &NewStreamBuffer,\r | |
1128 | &NewStreamBufferSize,\r | |
1129 | &AuthenticationStatus\r | |
1130 | );\r | |
1131 | ASSERT_EFI_ERROR (Status);\r | |
1132 | //\r | |
1133 | // OR in the parent stream's aggregagate status.\r | |
1134 | //\r | |
1135 | AuthenticationStatus |= Context->ParentStream->AuthenticationStatus & EFI_AGGREGATE_AUTH_STATUS_ALL;\r | |
1136 | Status = OpenSectionStreamEx (\r | |
1137 | NewStreamBufferSize,\r | |
1138 | NewStreamBuffer,\r | |
1139 | FALSE,\r | |
1140 | AuthenticationStatus,\r | |
1141 | &Context->ChildNode->EncapsulatedStreamHandle\r | |
1142 | );\r | |
1143 | ASSERT_EFI_ERROR (Status);\r | |
1144 | }\r | |
1145 | \r | |
1146 | //\r | |
1147 | // If above, the stream did not close successfully, it indicates it's\r | |
1148 | // alread been closed by someone, so just destroy the event and be done with\r | |
1149 | // it.\r | |
1150 | //\r | |
1151 | \r | |
1152 | CoreCloseEvent (Event);\r | |
1153 | CoreFreePool (Context);\r | |
1154 | } \r | |
1155 | \r | |
1156 | \r | |
1157 | STATIC\r | |
1158 | VOID\r | |
1159 | FreeChildNode (\r | |
1160 | IN CORE_SECTION_CHILD_NODE *ChildNode\r | |
1161 | )\r | |
1162 | /*++\r | |
1163 | \r | |
1164 | Routine Description:\r | |
1165 | Worker function. Destructor for child nodes.\r | |
1166 | \r | |
1167 | Arguments:\r | |
1168 | ChildNode - Indicates the node to destroy\r | |
1169 | \r | |
1170 | Returns:\r | |
1171 | none\r | |
1172 | \r | |
1173 | --*/\r | |
1174 | {\r | |
1175 | ASSERT (ChildNode->Signature == CORE_SECTION_CHILD_SIGNATURE);\r | |
1176 | //\r | |
1177 | // Remove the child from it's list\r | |
1178 | //\r | |
1179 | RemoveEntryList (&ChildNode->Link);\r | |
1180 | \r | |
1181 | if (ChildNode->EncapsulatedStreamHandle != NULL_STREAM_HANDLE) {\r | |
1182 | //\r | |
1183 | // If it's an encapsulating section, we close the resulting section stream.\r | |
1184 | // CloseSectionStream will free all memory associated with the stream.\r | |
1185 | //\r | |
1186 | CloseSectionStream (&mSectionExtraction, ChildNode->EncapsulatedStreamHandle);\r | |
1187 | }\r | |
1188 | //\r | |
1189 | // Last, free the child node itself\r | |
1190 | //\r | |
1191 | CoreFreePool (ChildNode);\r | |
1192 | } \r | |
1193 | \r | |
1194 | \r | |
1195 | STATIC\r | |
1196 | EFI_STATUS\r | |
1197 | OpenSectionStreamEx (\r | |
1198 | IN UINTN SectionStreamLength,\r | |
1199 | IN VOID *SectionStream,\r | |
1200 | IN BOOLEAN AllocateBuffer,\r | |
1201 | IN UINT32 AuthenticationStatus, \r | |
1202 | OUT UINTN *SectionStreamHandle\r | |
1203 | )\r | |
1204 | /*++\r | |
1205 | \r | |
1206 | Routine Description:\r | |
1207 | Worker function. Constructor for section streams.\r | |
1208 | \r | |
1209 | Arguments:\r | |
1210 | SectionStreamLength - Size in bytes of the section stream.\r | |
1211 | SectionStream - Buffer containing the new section stream.\r | |
1212 | AllocateBuffer - Indicates whether the stream buffer is to be copied\r | |
1213 | or the input buffer is to be used in place.\r | |
1214 | AuthenticationStatus- Indicates the default authentication status for the\r | |
1215 | new stream.\r | |
1216 | SectionStreamHandle - A pointer to a caller allocated section stream handle.\r | |
1217 | \r | |
1218 | Returns:\r | |
1219 | EFI_SUCCESS - Stream was added to stream database.\r | |
1220 | EFI_OUT_OF_RESOURCES - memory allocation failed.\r | |
1221 | \r | |
1222 | --*/\r | |
1223 | {\r | |
1224 | CORE_SECTION_STREAM_NODE *NewStream;\r | |
1225 | EFI_TPL OldTpl;\r | |
1226 | \r | |
1227 | //\r | |
1228 | // Allocate a new stream\r | |
1229 | //\r | |
1230 | NewStream = CoreAllocateBootServicesPool (sizeof (CORE_SECTION_STREAM_NODE));\r | |
1231 | if (NewStream == NULL) {\r | |
1232 | return EFI_OUT_OF_RESOURCES;\r | |
1233 | }\r | |
1234 | \r | |
1235 | if (AllocateBuffer) { \r | |
1236 | //\r | |
1237 | // if we're here, we're double buffering, allocate the buffer and copy the\r | |
1238 | // data in\r | |
1239 | //\r | |
1240 | if (SectionStreamLength > 0) {\r | |
1241 | NewStream->StreamBuffer = CoreAllocateBootServicesPool (SectionStreamLength); \r | |
1242 | if (NewStream->StreamBuffer == NULL) {\r | |
1243 | CoreFreePool (NewStream);\r | |
1244 | return EFI_OUT_OF_RESOURCES;\r | |
1245 | }\r | |
1246 | //\r | |
1247 | // Copy in stream data\r | |
1248 | //\r | |
1249 | CopyMem (NewStream->StreamBuffer, SectionStream, SectionStreamLength);\r | |
1250 | } else {\r | |
1251 | //\r | |
1252 | // It's possible to have a zero length section stream.\r | |
1253 | //\r | |
1254 | NewStream->StreamBuffer = NULL;\r | |
1255 | }\r | |
1256 | } else {\r | |
1257 | //\r | |
1258 | // If were here, the caller has supplied the buffer (it's an internal call)\r | |
1259 | // so just assign the buffer. This happens when we open section streams\r | |
1260 | // as a result of expanding an encapsulating section.\r | |
1261 | //\r | |
1262 | NewStream->StreamBuffer = SectionStream;\r | |
1263 | }\r | |
1264 | \r | |
1265 | //\r | |
1266 | // Initialize the rest of the section stream\r | |
1267 | //\r | |
1268 | NewStream->Signature = CORE_SECTION_STREAM_SIGNATURE;\r | |
1269 | NewStream->StreamHandle = (UINTN) NewStream;\r | |
1270 | NewStream->StreamLength = SectionStreamLength;\r | |
1271 | InitializeListHead (&NewStream->Children);\r | |
1272 | NewStream->AuthenticationStatus = AuthenticationStatus;\r | |
1273 | \r | |
1274 | //\r | |
1275 | // Add new stream to stream list\r | |
1276 | //\r | |
1277 | OldTpl = CoreRaiseTpl (TPL_NOTIFY);\r | |
1278 | InsertTailList (&mStreamRoot, &NewStream->Link);\r | |
1279 | CoreRestoreTpl (OldTpl);\r | |
1280 | \r | |
1281 | *SectionStreamHandle = NewStream->StreamHandle;\r | |
1282 | \r | |
1283 | return EFI_SUCCESS;\r | |
1284 | }\r | |
1285 | \r | |
1286 | \r | |
1287 | STATIC\r | |
1288 | EFI_STATUS\r | |
1289 | FindStreamNode (\r | |
1290 | IN UINTN SearchHandle,\r | |
1291 | OUT CORE_SECTION_STREAM_NODE **FoundStream\r | |
1292 | )\r | |
1293 | /*++\r | |
1294 | \r | |
1295 | Routine Description:\r | |
1296 | Worker function. Search stream database for requested stream handle.\r | |
1297 | \r | |
1298 | Arguments:\r | |
1299 | SearchHandle - Indicates which stream to look for.\r | |
1300 | FoundStream - Output pointer to the found stream.\r | |
1301 | \r | |
1302 | Returns:\r | |
1303 | EFI_SUCCESS - StreamHandle was found and *FoundStream contains\r | |
1304 | the stream node.\r | |
1305 | EFI_NOT_FOUND - SearchHandle was not found in the stream database.\r | |
1306 | \r | |
1307 | --*/\r | |
1308 | { \r | |
1309 | CORE_SECTION_STREAM_NODE *StreamNode;\r | |
1310 | \r | |
1311 | if (!IsListEmpty (&mStreamRoot)) {\r | |
1312 | StreamNode = STREAM_NODE_FROM_LINK (GetFirstNode (&mStreamRoot));\r | |
1313 | for (;;) {\r | |
1314 | if (StreamNode->StreamHandle == SearchHandle) {\r | |
1315 | *FoundStream = StreamNode;\r | |
1316 | return EFI_SUCCESS;\r | |
1317 | } else if (IsNodeAtEnd (&mStreamRoot, &StreamNode->Link)) {\r | |
1318 | break;\r | |
1319 | } else {\r | |
1320 | StreamNode = STREAM_NODE_FROM_LINK (GetNextNode (&mStreamRoot, &StreamNode->Link));\r | |
1321 | }\r | |
1322 | }\r | |
1323 | }\r | |
1324 | \r | |
1325 | return EFI_NOT_FOUND;\r | |
1326 | }\r | |
1327 | \r | |
1328 | \r | |
1329 | STATIC\r | |
1330 | BOOLEAN\r | |
1331 | IsValidSectionStream (\r | |
1332 | IN VOID *SectionStream,\r | |
1333 | IN UINTN SectionStreamLength\r | |
1334 | )\r | |
1335 | /*++\r | |
1336 | \r | |
1337 | Routine Description:\r | |
1338 | Check if a stream is valid.\r | |
1339 | \r | |
1340 | Arguments:\r | |
1341 | SectionStream - The section stream to be checked\r | |
1342 | SectionStreamLength - The length of section stream\r | |
1343 | \r | |
1344 | Returns:\r | |
1345 | TRUE\r | |
1346 | FALSE\r | |
1347 | \r | |
1348 | --*/\r | |
1349 | {\r | |
1350 | UINTN TotalLength;\r | |
1351 | UINTN SectionLength;\r | |
1352 | EFI_COMMON_SECTION_HEADER *SectionHeader;\r | |
1353 | EFI_COMMON_SECTION_HEADER *NextSectionHeader;\r | |
1354 | \r | |
1355 | TotalLength = 0;\r | |
1356 | SectionHeader = (EFI_COMMON_SECTION_HEADER *)SectionStream;\r | |
1357 | \r | |
1358 | while (TotalLength < SectionStreamLength) {\r | |
1359 | SectionLength = SECTION_SIZE (SectionHeader);\r | |
1360 | TotalLength += SectionLength;\r | |
1361 | \r | |
1362 | if (TotalLength == SectionStreamLength) {\r | |
1363 | return TRUE; \r | |
1364 | }\r | |
1365 | \r | |
1366 | //\r | |
1367 | // Move to the next byte following the section...\r | |
1368 | //\r | |
1369 | SectionHeader = (EFI_COMMON_SECTION_HEADER *) ((UINT8 *) SectionHeader + SectionLength);\r | |
1370 | \r | |
1371 | //\r | |
1372 | // Figure out where the next section begins\r | |
1373 | //\r | |
1374 | NextSectionHeader = (EFI_COMMON_SECTION_HEADER *) ((UINTN) SectionHeader + 3);\r | |
1375 | NextSectionHeader = (EFI_COMMON_SECTION_HEADER *) ((UINTN) NextSectionHeader & ~(UINTN)3);\r | |
1376 | TotalLength += (UINTN) NextSectionHeader - (UINTN) SectionHeader;\r | |
1377 | SectionHeader = NextSectionHeader;\r | |
1378 | }\r | |
1379 | \r | |
1380 | ASSERT (FALSE);\r | |
1381 | return FALSE;\r | |
1382 | }\r | |
d8c79a81 LG |
1383 | \r |
1384 | /**\r | |
1385 | The ExtractSection() function processes the input section and\r | |
1386 | allocates a buffer from the pool in which it returns the section\r | |
1387 | contents. If the section being extracted contains\r | |
1388 | authentication information (the section's\r | |
1389 | GuidedSectionHeader.Attributes field has the\r | |
1390 | EFI_GUIDED_SECTION_AUTH_STATUS_VALID bit set), the values\r | |
1391 | returned in AuthenticationStatus must reflect the results of\r | |
1392 | the authentication operation. Depending on the algorithm and\r | |
1393 | size of the encapsulated data, the time that is required to do\r | |
1394 | a full authentication may be prohibitively long for some\r | |
1395 | classes of systems. To indicate this, use\r | |
1396 | EFI_SECURITY_POLICY_PROTOCOL_GUID, which may be published by\r | |
1397 | the security policy driver (see the Platform Initialization\r | |
1398 | Driver Execution Environment Core Interface Specification for\r | |
1399 | more details and the GUID definition). If the\r | |
1400 | EFI_SECURITY_POLICY_PROTOCOL_GUID exists in the handle\r | |
1401 | database, then, if possible, full authentication should be\r | |
1402 | skipped and the section contents simply returned in the\r | |
1403 | OutputBuffer. In this case, the\r | |
1404 | EFI_AUTH_STATUS_PLATFORM_OVERRIDE bit AuthenticationStatus\r | |
1405 | must be set on return. ExtractSection() is callable only from\r | |
1406 | TPL_NOTIFY and below. Behavior of ExtractSection() at any\r | |
1407 | EFI_TPL above TPL_NOTIFY is undefined. Type EFI_TPL is\r | |
1408 | defined in RaiseTPL() in the UEFI 2.0 specification.\r | |
1409 | \r | |
1410 | \r | |
1411 | @param This Indicates the\r | |
1412 | EFI_GUIDED_SECTION_EXTRACTION_PROTOCOL instance.\r | |
1413 | \r | |
1414 | @param InputSection Buffer containing the input GUIDed section\r | |
1415 | to be processed. OutputBuffer OutputBuffer\r | |
1416 | is allocated from boot services pool\r | |
1417 | memory and contains the new section\r | |
1418 | stream. The caller is responsible for\r | |
1419 | freeing this buffer.\r | |
1420 | \r | |
1421 | @param OutputSize A pointer to a caller-allocated UINTN in\r | |
1422 | which the size of OutputBuffer allocation\r | |
1423 | is stored. If the function returns\r | |
1424 | anything other than EFI_SUCCESS, the value\r | |
1425 | of OutputSize is undefined.\r | |
1426 | \r | |
1427 | @param AuthenticationStatus A pointer to a caller-allocated\r | |
1428 | UINT32 that indicates the\r | |
1429 | authentication status of the\r | |
1430 | output buffer. If the input\r | |
1431 | section's\r | |
1432 | GuidedSectionHeader.Attributes\r | |
1433 | field has the\r | |
1434 | EFI_GUIDED_SECTION_AUTH_STATUS_VAL\r | |
1435 | bit as clear, AuthenticationStatus\r | |
1436 | must return zero. Both local bits\r | |
1437 | (19:16) and aggregate bits (3:0)\r | |
1438 | in AuthenticationStatus are\r | |
1439 | returned by ExtractSection().\r | |
1440 | These bits reflect the status of\r | |
1441 | the extraction operation. The bit\r | |
1442 | pattern in both regions must be\r | |
1443 | the same, as the local and\r | |
1444 | aggregate authentication statuses\r | |
1445 | have equivalent meaning at this\r | |
1446 | level. If the function returns\r | |
1447 | anything other than EFI_SUCCESS,\r | |
1448 | the value of AuthenticationStatus\r | |
1449 | is undefined.\r | |
1450 | \r | |
1451 | \r | |
1452 | @retval EFI_SUCCESS The InputSection was successfully\r | |
1453 | processed and the section contents were\r | |
1454 | returned.\r | |
1455 | \r | |
1456 | @retval EFI_OUT_OF_RESOURCES The system has insufficient\r | |
1457 | resources to process the\r | |
1458 | request.\r | |
1459 | \r | |
1460 | @retval EFI_INVALID_PARAMETER The GUID in InputSection does\r | |
1461 | not match this instance of the\r | |
1462 | GUIDed Section Extraction\r | |
1463 | Protocol.\r | |
1464 | \r | |
1465 | **/\r | |
1466 | EFI_STATUS\r | |
1467 | CustomDecompressExtractSection (\r | |
1468 | IN CONST EFI_GUIDED_SECTION_EXTRACTION_PROTOCOL *This,\r | |
1469 | IN CONST VOID *InputSection,\r | |
1470 | OUT VOID **OutputBuffer,\r | |
1471 | OUT UINTN *OutputSize,\r | |
1472 | OUT UINT32 *AuthenticationStatus\r | |
1473 | )\r | |
1474 | {\r | |
1475 | EFI_STATUS Status;\r | |
1476 | UINT8 *ScratchBuffer;\r | |
7a31af6a | 1477 | UINT32 DestinationSize;\r |
d8c79a81 LG |
1478 | UINT32 ScratchSize;\r |
1479 | UINT32 SectionLength; \r | |
1480 | \r | |
1481 | //\r | |
1482 | // Set authentic value to zero.\r | |
1483 | //\r | |
1484 | *AuthenticationStatus = 0;\r | |
1485 | //\r | |
1486 | // Calculate Section data Size\r | |
1487 | //\r | |
1488 | SectionLength = *(UINT32 *) (((EFI_COMMON_SECTION_HEADER *) InputSection)->Size) & 0x00ffffff;\r | |
1489 | //\r | |
1490 | // Get compressed data information\r | |
1491 | //\r | |
1492 | Status = CustomDecompressGetInfo (\r | |
1493 | (GUID *) ((UINT8 *) InputSection + sizeof (EFI_COMMON_SECTION_HEADER)),\r | |
1494 | (UINT8 *) InputSection + sizeof (EFI_GUID_DEFINED_SECTION),\r | |
1495 | SectionLength - sizeof (EFI_GUID_DEFINED_SECTION),\r | |
7a31af6a | 1496 | &DestinationSize,\r |
d8c79a81 LG |
1497 | &ScratchSize\r |
1498 | );\r | |
1499 | if (EFI_ERROR (Status)) {\r | |
1500 | //\r | |
1501 | // GetInfo failed\r | |
1502 | //\r | |
1503 | DEBUG ((EFI_D_ERROR, "Extract guided section Failed - %r\n", Status));\r | |
1504 | return Status;\r | |
1505 | }\r | |
1506 | \r | |
1507 | //\r | |
1508 | // Allocate scratch buffer\r | |
1509 | //\r | |
1510 | ScratchBuffer = CoreAllocateBootServicesPool (ScratchSize);\r | |
1511 | if (ScratchBuffer == NULL) {\r | |
1512 | return EFI_OUT_OF_RESOURCES;\r | |
1513 | }\r | |
1514 | //\r | |
1515 | // Allocate destination buffer\r | |
1516 | //\r | |
7a31af6a | 1517 | *OutputSize = (UINTN) DestinationSize;\r |
d8c79a81 LG |
1518 | *OutputBuffer = CoreAllocateBootServicesPool (*OutputSize);\r |
1519 | if (*OutputBuffer == NULL) {\r | |
1520 | CoreFreePool (ScratchBuffer);\r | |
1521 | return EFI_OUT_OF_RESOURCES;\r | |
1522 | }\r | |
1523 | \r | |
1524 | //\r | |
1525 | // Call decompress function\r | |
1526 | //\r | |
1527 | Status = CustomDecompress (\r | |
1528 | (GUID *) ((UINT8 *) InputSection + sizeof (EFI_COMMON_SECTION_HEADER)),\r | |
1529 | (UINT8 *) InputSection + sizeof (EFI_GUID_DEFINED_SECTION),\r | |
1530 | *OutputBuffer,\r | |
1531 | ScratchBuffer\r | |
1532 | );\r | |
1533 | if (EFI_ERROR (Status)) {\r | |
1534 | //\r | |
1535 | // Decompress failed\r | |
1536 | //\r | |
1537 | CoreFreePool (ScratchBuffer);\r | |
1538 | CoreFreePool (*OutputBuffer);\r | |
1539 | DEBUG ((EFI_D_ERROR, "Extract guided section Failed - %r\n", Status));\r | |
1540 | return Status;\r | |
1541 | }\r | |
1542 | \r | |
1543 | //\r | |
1544 | // Free unused scratch buffer.\r | |
1545 | //\r | |
1546 | CoreFreePool (ScratchBuffer);\r | |
1547 | \r | |
1548 | return EFI_SUCCESS;\r | |
1549 | } |