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c2df8e13 | 1 | /** @file\r |
2 | Implements functions to read firmware file.\r | |
3 | \r | |
23491d5c | 4 | Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r |
c2df8e13 | 5 | \r |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions\r | |
8 | of the BSD License which accompanies this distribution. The\r | |
9 | full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | #include "FwVolDriver.h"\r | |
18 | \r | |
19 | UINT8 mFvAttributes[] = { 0, 4, 7, 9, 10, 12, 15, 16 };\r | |
20 | \r | |
21 | /**\r | |
22 | Convert the FFS File Attributes to FV File Attributes.\r | |
23 | \r | |
24 | @param FfsAttributes The attributes of UINT8 type.\r | |
25 | \r | |
26 | @return The attributes of EFI_FV_FILE_ATTRIBUTES\r | |
27 | \r | |
28 | **/\r | |
29 | EFI_FV_FILE_ATTRIBUTES\r | |
30 | FfsAttributes2FvFileAttributes (\r | |
31 | IN EFI_FFS_FILE_ATTRIBUTES FfsAttributes\r | |
32 | )\r | |
33 | {\r | |
34 | FfsAttributes = (EFI_FFS_FILE_ATTRIBUTES) ((FfsAttributes & FFS_ATTRIB_DATA_ALIGNMENT) >> 3);\r | |
35 | ASSERT (FfsAttributes < 8);\r | |
36 | return (EFI_FV_FILE_ATTRIBUTES) mFvAttributes[FfsAttributes];\r | |
37 | }\r | |
38 | \r | |
39 | /**\r | |
40 | Given the input key, search for the next matching file in the volume.\r | |
41 | \r | |
42 | @param This Indicates the calling context.\r | |
43 | @param Key Key is a pointer to a caller allocated\r | |
44 | buffer that contains implementation specific\r | |
45 | data that is used to track where to begin\r | |
46 | the search for the next file. The size of\r | |
47 | the buffer must be at least This->KeySize\r | |
48 | bytes long. To reinitialize the search and\r | |
49 | begin from the beginning of the firmware\r | |
50 | volume, the entire buffer must be cleared to\r | |
51 | zero. Other than clearing the buffer to\r | |
52 | initiate a new search, the caller must not\r | |
53 | modify the data in the buffer between calls\r | |
54 | to GetNextFile().\r | |
55 | @param FileType FileType is a pointer to a caller allocated\r | |
56 | EFI_FV_FILETYPE. The GetNextFile() API can\r | |
57 | filter it's search for files based on the\r | |
58 | value of *FileType input. A *FileType input\r | |
59 | of 0 causes GetNextFile() to search for\r | |
60 | files of all types. If a file is found, the\r | |
61 | file's type is returned in *FileType.\r | |
62 | *FileType is not modified if no file is\r | |
63 | found.\r | |
64 | @param NameGuid NameGuid is a pointer to a caller allocated\r | |
65 | EFI_GUID. If a file is found, the file's\r | |
66 | name is returned in *NameGuid. *NameGuid is\r | |
67 | not modified if no file is found.\r | |
68 | @param Attributes Attributes is a pointer to a caller\r | |
69 | allocated EFI_FV_FILE_ATTRIBUTES. If a file\r | |
70 | is found, the file's attributes are returned\r | |
71 | in *Attributes. *Attributes is not modified\r | |
72 | if no file is found.\r | |
73 | @param Size Size is a pointer to a caller allocated\r | |
74 | UINTN. If a file is found, the file's size\r | |
75 | is returned in *Size. *Size is not modified\r | |
76 | if no file is found.\r | |
77 | \r | |
78 | @retval EFI_SUCCESS Successfully find the file.\r | |
79 | @retval EFI_DEVICE_ERROR Device error.\r | |
80 | @retval EFI_ACCESS_DENIED Fv could not read.\r | |
81 | @retval EFI_NOT_FOUND No matching file found.\r | |
82 | @retval EFI_INVALID_PARAMETER Invalid parameter\r | |
83 | \r | |
84 | **/\r | |
85 | EFI_STATUS\r | |
86 | EFIAPI\r | |
87 | FvGetNextFile (\r | |
88 | IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,\r | |
89 | IN OUT VOID *Key,\r | |
90 | IN OUT EFI_FV_FILETYPE *FileType,\r | |
91 | OUT EFI_GUID *NameGuid,\r | |
92 | OUT EFI_FV_FILE_ATTRIBUTES *Attributes,\r | |
93 | OUT UINTN *Size\r | |
94 | )\r | |
95 | {\r | |
96 | EFI_STATUS Status;\r | |
97 | FV_DEVICE *FvDevice;\r | |
98 | EFI_FV_ATTRIBUTES FvAttributes;\r | |
99 | EFI_FFS_FILE_HEADER *FfsFileHeader;\r | |
100 | UINTN *KeyValue;\r | |
101 | LIST_ENTRY *Link;\r | |
102 | FFS_FILE_LIST_ENTRY *FfsFileEntry;\r | |
c2df8e13 | 103 | \r |
104 | FvDevice = FV_DEVICE_FROM_THIS (This);\r | |
105 | \r | |
106 | Status = This->GetVolumeAttributes (This, &FvAttributes);\r | |
107 | if (EFI_ERROR (Status)) {\r | |
108 | return Status;\r | |
109 | }\r | |
110 | \r | |
111 | KeyValue = (UINTN *) Key;\r | |
112 | FfsFileHeader = NULL;\r | |
113 | \r | |
114 | //\r | |
115 | // Check if read operation is enabled\r | |
116 | //\r | |
117 | if ((FvAttributes & EFI_FV2_READ_STATUS) == 0) {\r | |
118 | return EFI_ACCESS_DENIED;\r | |
119 | }\r | |
120 | \r | |
121 | if (*FileType > EFI_FV_FILETYPE_SMM_CORE) {\r | |
122 | //\r | |
123 | // File type needs to be in 0 - 0x0D\r | |
124 | //\r | |
125 | return EFI_NOT_FOUND;\r | |
126 | }\r | |
127 | \r | |
128 | do {\r | |
129 | if (*KeyValue == 0) {\r | |
130 | //\r | |
131 | // Search for 1st matching file\r | |
132 | //\r | |
133 | Link = &FvDevice->FfsFileListHeader;\r | |
134 | if (Link->ForwardLink == &FvDevice->FfsFileListHeader) {\r | |
135 | return EFI_NOT_FOUND;\r | |
136 | }\r | |
137 | \r | |
138 | FfsFileEntry = (FFS_FILE_LIST_ENTRY *) Link->ForwardLink;\r | |
139 | FfsFileHeader = (EFI_FFS_FILE_HEADER *) FfsFileEntry->FfsHeader;\r | |
140 | \r | |
141 | //\r | |
142 | // remember the key\r | |
143 | //\r | |
144 | *KeyValue = (UINTN) FfsFileEntry;\r | |
145 | \r | |
146 | //\r | |
147 | // we ignore pad files\r | |
148 | //\r | |
149 | if (FfsFileHeader->Type == EFI_FV_FILETYPE_FFS_PAD) {\r | |
150 | continue;\r | |
151 | }\r | |
152 | \r | |
153 | if (*FileType == 0) {\r | |
154 | break;\r | |
155 | }\r | |
156 | \r | |
157 | if (*FileType == FfsFileHeader->Type) {\r | |
158 | break;\r | |
159 | }\r | |
160 | \r | |
161 | } else {\r | |
162 | //\r | |
163 | // Getting link from last Ffs\r | |
164 | //\r | |
165 | Link = (LIST_ENTRY *) (*KeyValue);\r | |
166 | if (Link->ForwardLink == &FvDevice->FfsFileListHeader) {\r | |
167 | return EFI_NOT_FOUND;\r | |
168 | }\r | |
169 | \r | |
170 | FfsFileEntry = (FFS_FILE_LIST_ENTRY *) Link->ForwardLink;\r | |
171 | FfsFileHeader = (EFI_FFS_FILE_HEADER *) FfsFileEntry->FfsHeader;\r | |
172 | \r | |
173 | //\r | |
174 | // remember the key\r | |
175 | //\r | |
176 | *KeyValue = (UINTN) FfsFileEntry;\r | |
177 | \r | |
178 | //\r | |
179 | // we ignore pad files\r | |
180 | //\r | |
181 | if (FfsFileHeader->Type == EFI_FV_FILETYPE_FFS_PAD) {\r | |
182 | continue;\r | |
183 | }\r | |
184 | \r | |
185 | if (*FileType == EFI_FV_FILETYPE_ALL) {\r | |
186 | break;\r | |
187 | }\r | |
188 | \r | |
189 | if (*FileType == FfsFileHeader->Type) {\r | |
190 | break;\r | |
191 | }\r | |
192 | }\r | |
193 | } while (Link->ForwardLink != &FvDevice->FfsFileListHeader);\r | |
194 | \r | |
195 | //\r | |
196 | // Cache this file entry\r | |
197 | //\r | |
198 | FvDevice->CurrentFfsFile = FfsFileEntry;\r | |
199 | \r | |
200 | *FileType = FfsFileHeader->Type;\r | |
201 | CopyGuid (NameGuid, &FfsFileHeader->Name);\r | |
202 | *Attributes = FfsAttributes2FvFileAttributes (FfsFileHeader->Attributes);\r | |
203 | \r | |
c2df8e13 | 204 | //\r |
205 | // we need to substract the header size\r | |
206 | //\r | |
23491d5c SZ |
207 | if (IS_FFS_FILE2 (FfsFileHeader)) {\r |
208 | *Size = FFS_FILE2_SIZE (FfsFileHeader) - sizeof (EFI_FFS_FILE_HEADER2);\r | |
209 | } else {\r | |
210 | *Size = FFS_FILE_SIZE (FfsFileHeader) - sizeof (EFI_FFS_FILE_HEADER);\r | |
211 | }\r | |
c2df8e13 | 212 | \r |
213 | if (CompareGuid (&gEfiFirmwareVolumeTopFileGuid, NameGuid)) {\r | |
214 | //\r | |
215 | // specially deal with VTF file\r | |
216 | //\r | |
217 | UINT8 *SrcPtr;\r | |
218 | UINT32 Tmp;\r | |
219 | \r | |
23491d5c SZ |
220 | if (IS_FFS_FILE2 (FfsFileHeader)) {\r |
221 | SrcPtr = ((UINT8 *) FfsFileHeader) + sizeof (EFI_FFS_FILE_HEADER2);\r | |
222 | } else {\r | |
223 | SrcPtr = ((UINT8 *) FfsFileHeader) + sizeof (EFI_FFS_FILE_HEADER);\r | |
224 | }\r | |
c2df8e13 | 225 | \r |
226 | while (*Size >= 4) {\r | |
227 | Tmp = *(UINT32 *) SrcPtr;\r | |
228 | if (Tmp == 0) {\r | |
229 | SrcPtr += 4;\r | |
230 | (*Size) -= 4;\r | |
231 | } else {\r | |
232 | break;\r | |
233 | }\r | |
234 | }\r | |
235 | }\r | |
236 | \r | |
237 | return EFI_SUCCESS;\r | |
238 | }\r | |
239 | \r | |
240 | /**\r | |
241 | Locates a file in the firmware volume and\r | |
242 | copies it to the supplied buffer.\r | |
243 | \r | |
244 | @param This Indicates the calling context.\r | |
245 | @param NameGuid Pointer to an EFI_GUID, which is the\r | |
246 | filename.\r | |
247 | @param Buffer Buffer is a pointer to pointer to a buffer\r | |
248 | in which the file or section contents or are\r | |
249 | returned.\r | |
250 | @param BufferSize BufferSize is a pointer to caller allocated\r | |
251 | UINTN. On input *BufferSize indicates the\r | |
252 | size in bytes of the memory region pointed\r | |
253 | to by Buffer. On output, *BufferSize\r | |
254 | contains the number of bytes required to\r | |
255 | read the file.\r | |
256 | @param FoundType FoundType is a pointer to a caller allocated\r | |
257 | EFI_FV_FILETYPE that on successful return\r | |
258 | from Read() contains the type of file read.\r | |
259 | This output reflects the file type\r | |
260 | irrespective of the value of the SectionType\r | |
261 | input.\r | |
262 | @param FileAttributes FileAttributes is a pointer to a caller\r | |
263 | allocated EFI_FV_FILE_ATTRIBUTES. On\r | |
264 | successful return from Read(),\r | |
265 | *FileAttributes contains the attributes of\r | |
266 | the file read.\r | |
267 | @param AuthenticationStatus AuthenticationStatus is a pointer to a\r | |
268 | caller allocated UINTN in which the\r | |
269 | authentication status is returned.\r | |
270 | \r | |
271 | @retval EFI_SUCCESS Successfully read to memory buffer.\r | |
272 | @retval EFI_WARN_BUFFER_TOO_SMALL Buffer too small.\r | |
273 | @retval EFI_NOT_FOUND Not found.\r | |
274 | @retval EFI_DEVICE_ERROR Device error.\r | |
275 | @retval EFI_ACCESS_DENIED Could not read.\r | |
276 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
277 | @retval EFI_OUT_OF_RESOURCES Not enough buffer to be allocated.\r | |
278 | \r | |
279 | **/\r | |
280 | EFI_STATUS\r | |
281 | EFIAPI\r | |
282 | FvReadFile (\r | |
283 | IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,\r | |
284 | IN CONST EFI_GUID *NameGuid,\r | |
285 | IN OUT VOID **Buffer,\r | |
286 | IN OUT UINTN *BufferSize,\r | |
287 | OUT EFI_FV_FILETYPE *FoundType,\r | |
288 | OUT EFI_FV_FILE_ATTRIBUTES *FileAttributes,\r | |
289 | OUT UINT32 *AuthenticationStatus\r | |
290 | )\r | |
291 | {\r | |
292 | EFI_STATUS Status;\r | |
293 | FV_DEVICE *FvDevice;\r | |
294 | UINTN Key;\r | |
295 | EFI_GUID SearchNameGuid;\r | |
296 | EFI_FV_ATTRIBUTES FvAttributes;\r | |
297 | EFI_FV_FILETYPE LocalFoundType;\r | |
298 | EFI_FV_FILE_ATTRIBUTES LocalAttributes;\r | |
299 | UINTN FileSize;\r | |
300 | UINT8 *SrcPtr;\r | |
301 | FFS_FILE_LIST_ENTRY *FfsFileEntry;\r | |
302 | EFI_FFS_FILE_HEADER *FfsHeader;\r | |
303 | UINT8 *FileBuffer;\r | |
304 | \r | |
305 | if (NULL == This || NULL == NameGuid) {\r | |
306 | return EFI_INVALID_PARAMETER;\r | |
307 | }\r | |
308 | \r | |
309 | FvDevice = FV_DEVICE_FROM_THIS (This);\r | |
310 | \r | |
311 | Status = This->GetVolumeAttributes (This, &FvAttributes);\r | |
312 | if (EFI_ERROR (Status)) {\r | |
313 | return Status;\r | |
314 | }\r | |
315 | //\r | |
316 | // First check to see that FV is enabled for reads...\r | |
317 | //\r | |
318 | if (0 == (FvAttributes & EFI_FV2_READ_STATUS)) {\r | |
319 | return EFI_ACCESS_DENIED;\r | |
320 | }\r | |
321 | \r | |
322 | FfsHeader = NULL;\r | |
323 | \r | |
324 | //\r | |
325 | // Check if the file was read last time.\r | |
326 | //\r | |
327 | FfsFileEntry = FvDevice->CurrentFfsFile;\r | |
328 | \r | |
329 | if (FfsFileEntry != NULL) {\r | |
330 | FfsHeader = (EFI_FFS_FILE_HEADER *) FfsFileEntry->FfsHeader;\r | |
331 | }\r | |
332 | \r | |
333 | if ((FfsFileEntry == NULL) || (!CompareGuid (&FfsHeader->Name, NameGuid))) {\r | |
334 | //\r | |
335 | // If not match or no file cached, search this file\r | |
336 | //\r | |
337 | Key = 0;\r | |
338 | do {\r | |
339 | LocalFoundType = 0;\r | |
340 | Status = This->GetNextFile (\r | |
341 | This,\r | |
342 | &Key,\r | |
343 | &LocalFoundType,\r | |
344 | &SearchNameGuid,\r | |
345 | &LocalAttributes,\r | |
346 | &FileSize\r | |
347 | );\r | |
348 | if (EFI_ERROR (Status)) {\r | |
349 | return EFI_NOT_FOUND;\r | |
350 | }\r | |
351 | } while (!CompareGuid (&SearchNameGuid, NameGuid));\r | |
352 | \r | |
353 | //\r | |
354 | // Get file entry\r | |
355 | //\r | |
356 | FfsFileEntry = (FFS_FILE_LIST_ENTRY *) Key;\r | |
357 | \r | |
358 | //\r | |
359 | // Update the cache\r | |
360 | //\r | |
361 | FvDevice->CurrentFfsFile = FfsFileEntry;\r | |
362 | \r | |
363 | FfsHeader = (EFI_FFS_FILE_HEADER *) FfsFileEntry->FfsHeader;\r | |
364 | \r | |
365 | } else {\r | |
366 | //\r | |
367 | // Get File Size of the cached file\r | |
368 | //\r | |
23491d5c SZ |
369 | if (IS_FFS_FILE2 (FfsHeader)) {\r |
370 | FileSize = FFS_FILE2_SIZE (FfsHeader) - sizeof (EFI_FFS_FILE_HEADER2);\r | |
371 | } else {\r | |
372 | FileSize = FFS_FILE_SIZE (FfsHeader) - sizeof (EFI_FFS_FILE_HEADER);\r | |
373 | }\r | |
c2df8e13 | 374 | }\r |
375 | //\r | |
376 | // Get file info\r | |
377 | //\r | |
378 | *FoundType = FfsHeader->Type;\r | |
379 | *FileAttributes = FfsAttributes2FvFileAttributes (FfsHeader->Attributes);\r | |
380 | *AuthenticationStatus = 0;\r | |
381 | \r | |
382 | //\r | |
383 | // If Buffer is NULL, we only want to get some information\r | |
384 | //\r | |
385 | if (Buffer == NULL) {\r | |
386 | *BufferSize = FileSize;\r | |
387 | return EFI_SUCCESS;\r | |
388 | }\r | |
389 | \r | |
23491d5c SZ |
390 | if (IS_FFS_FILE2 (FfsHeader)) {\r |
391 | SrcPtr = ((UINT8 *) FfsHeader) + sizeof (EFI_FFS_FILE_HEADER2);\r | |
392 | } else {\r | |
393 | SrcPtr = ((UINT8 *) FfsHeader) + sizeof (EFI_FFS_FILE_HEADER);\r | |
394 | }\r | |
c2df8e13 | 395 | \r |
396 | if (CompareGuid (&gEfiFirmwareVolumeTopFileGuid, NameGuid)) {\r | |
397 | //\r | |
398 | // specially deal with VTF file\r | |
399 | //\r | |
400 | UINT32 Tmp;\r | |
401 | \r | |
402 | while (FileSize >= 4) {\r | |
403 | Tmp = *(UINT32 *) SrcPtr;\r | |
404 | if (Tmp == 0) {\r | |
405 | SrcPtr += 4;\r | |
406 | FileSize -= 4;\r | |
407 | } else {\r | |
408 | break;\r | |
409 | }\r | |
410 | }\r | |
411 | }\r | |
412 | //\r | |
413 | // If we drop out of the above loop, we've found the correct file header...\r | |
414 | //\r | |
415 | if (*Buffer == NULL) {\r | |
416 | FileBuffer = AllocateCopyPool (FileSize, SrcPtr);\r | |
417 | if (FileBuffer == NULL) {\r | |
418 | return EFI_OUT_OF_RESOURCES;\r | |
419 | }\r | |
420 | \r | |
421 | *BufferSize = FileSize;\r | |
422 | *Buffer = FileBuffer;\r | |
423 | \r | |
424 | return EFI_SUCCESS;\r | |
425 | }\r | |
426 | //\r | |
427 | // If the user's buffer is smaller than the file size, then copy as much\r | |
428 | // as we can and return an appropriate status.\r | |
429 | //\r | |
430 | if (FileSize > *BufferSize) {\r | |
431 | CopyMem (*Buffer, SrcPtr, *BufferSize);\r | |
432 | *BufferSize = FileSize;\r | |
433 | return EFI_WARN_BUFFER_TOO_SMALL;\r | |
434 | }\r | |
435 | //\r | |
436 | // User's buffer size is ok, so copy the entire file to their buffer.\r | |
437 | //\r | |
438 | *BufferSize = FileSize;\r | |
439 | CopyMem (*Buffer, SrcPtr, *BufferSize);\r | |
440 | \r | |
441 | return EFI_SUCCESS;\r | |
442 | }\r | |
443 | \r | |
444 | /**\r | |
445 | Locates a section in a given FFS File and\r | |
446 | copies it to the supplied buffer (not including section header).\r | |
447 | \r | |
448 | @param This Indicates the calling context.\r | |
449 | @param NameGuid Pointer to an EFI_GUID, which is the\r | |
450 | filename.\r | |
451 | @param SectionType Indicates the section type to return.\r | |
452 | @param SectionInstance Indicates which instance of sections with a\r | |
453 | type of SectionType to return.\r | |
454 | @param Buffer Buffer is a pointer to pointer to a buffer\r | |
455 | in which the file or section contents or are\r | |
456 | returned.\r | |
457 | @param BufferSize BufferSize is a pointer to caller allocated\r | |
458 | UINTN.\r | |
459 | @param AuthenticationStatus AuthenticationStatus is a pointer to a\r | |
460 | caller allocated UINT32 in which the\r | |
461 | authentication status is returned.\r | |
462 | \r | |
463 | @retval EFI_SUCCESS Successfully read the file section into\r | |
464 | buffer.\r | |
465 | @retval EFI_WARN_BUFFER_TOO_SMALL Buffer too small.\r | |
466 | @retval EFI_NOT_FOUND Section not found.\r | |
467 | @retval EFI_DEVICE_ERROR Device error.\r | |
468 | @retval EFI_ACCESS_DENIED Could not read.\r | |
469 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
470 | \r | |
471 | **/\r | |
472 | EFI_STATUS\r | |
473 | EFIAPI\r | |
474 | FvReadFileSection (\r | |
475 | IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,\r | |
476 | IN CONST EFI_GUID *NameGuid,\r | |
477 | IN EFI_SECTION_TYPE SectionType,\r | |
478 | IN UINTN SectionInstance,\r | |
479 | IN OUT VOID **Buffer,\r | |
480 | IN OUT UINTN *BufferSize,\r | |
481 | OUT UINT32 *AuthenticationStatus\r | |
482 | )\r | |
483 | {\r | |
484 | EFI_STATUS Status;\r | |
485 | EFI_FV_ATTRIBUTES FvAttributes;\r | |
486 | EFI_FV_FILETYPE FileType;\r | |
487 | EFI_FV_FILE_ATTRIBUTES FileAttributes;\r | |
488 | UINTN FileSize;\r | |
489 | UINT8 *FileBuffer;\r | |
490 | EFI_SECTION_EXTRACTION_PROTOCOL *Sep;\r | |
491 | UINTN StreamHandle;\r | |
492 | \r | |
493 | if (NULL == This || NULL == NameGuid || Buffer == NULL) {\r | |
494 | return EFI_INVALID_PARAMETER;\r | |
495 | }\r | |
496 | \r | |
497 | Status = This->GetVolumeAttributes (This, &FvAttributes);\r | |
498 | if (EFI_ERROR (Status)) {\r | |
499 | return Status;\r | |
500 | }\r | |
501 | //\r | |
502 | // First check to see that FV is enabled for reads...\r | |
503 | //\r | |
504 | if (0 == (FvAttributes & EFI_FV2_READ_STATUS)) {\r | |
505 | return EFI_ACCESS_DENIED;\r | |
506 | }\r | |
507 | //\r | |
508 | // Read the whole file into buffer\r | |
509 | //\r | |
510 | FileBuffer = NULL;\r | |
511 | Status = This->ReadFile (\r | |
512 | This,\r | |
513 | NameGuid,\r | |
514 | (VOID **) &FileBuffer,\r | |
515 | &FileSize,\r | |
516 | &FileType,\r | |
517 | &FileAttributes,\r | |
518 | AuthenticationStatus\r | |
519 | );\r | |
520 | \r | |
521 | if (EFI_ERROR (Status)) {\r | |
522 | return Status;\r | |
523 | }\r | |
524 | //\r | |
525 | // Check to see that the file actually HAS sections before we go any further.\r | |
526 | //\r | |
527 | if (FileType == EFI_FV_FILETYPE_RAW) {\r | |
528 | FreePool (FileBuffer);\r | |
529 | return EFI_NOT_FOUND;\r | |
530 | }\r | |
531 | //\r | |
532 | // Located the protocol\r | |
533 | //\r | |
534 | Status = gBS->LocateProtocol (\r | |
535 | &gEfiSectionExtractionProtocolGuid,\r | |
536 | NULL,\r | |
537 | (VOID **) &Sep\r | |
538 | );\r | |
539 | if (EFI_ERROR (Status)) {\r | |
540 | FreePool (FileBuffer);\r | |
541 | return Status;\r | |
542 | }\r | |
543 | \r | |
544 | Status = Sep->OpenSectionStream (\r | |
545 | Sep,\r | |
546 | FileSize,\r | |
547 | FileBuffer,\r | |
548 | &StreamHandle\r | |
549 | );\r | |
550 | \r | |
551 | if (EFI_ERROR (Status)) {\r | |
552 | FreePool (FileBuffer);\r | |
553 | return Status;\r | |
554 | }\r | |
555 | \r | |
556 | if (SectionType == 0) {\r | |
557 | //\r | |
558 | // We need the whole section stream\r | |
559 | //\r | |
560 | Status = Sep->GetSection (\r | |
561 | Sep,\r | |
562 | StreamHandle,\r | |
563 | NULL,\r | |
564 | NULL,\r | |
565 | 0,\r | |
566 | Buffer,\r | |
567 | BufferSize,\r | |
568 | AuthenticationStatus\r | |
569 | );\r | |
570 | } else {\r | |
571 | Status = Sep->GetSection (\r | |
572 | Sep,\r | |
573 | StreamHandle,\r | |
574 | &SectionType,\r | |
575 | NULL,\r | |
576 | SectionInstance,\r | |
577 | Buffer,\r | |
578 | BufferSize,\r | |
579 | AuthenticationStatus\r | |
580 | );\r | |
581 | }\r | |
582 | //\r | |
583 | // Handle AuthenticationStatus if necessary\r | |
584 | //\r | |
585 | Sep->CloseSectionStream (Sep, StreamHandle);\r | |
586 | \r | |
587 | FreePool (FileBuffer);\r | |
588 | \r | |
589 | return Status;\r | |
590 | }\r |