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c2df8e13 | 1 | /** @file\r |
2 | Implements functions to read firmware file.\r | |
3 | \r | |
67a6cf6d | 4 | Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>\r |
c2df8e13 | 5 | \r |
c0a00b14 | 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
c2df8e13 | 7 | \r |
8 | **/\r | |
9 | \r | |
10 | #include "FwVolDriver.h"\r | |
11 | \r | |
5eddabfc | 12 | /**\r |
67a6cf6d SZ |
13 | Required Alignment Alignment Value in FFS FFS_ATTRIB_DATA_ALIGNMENT2 Alignment Value in\r |
14 | (bytes) Attributes Field in FFS Attributes Field Firmware Volume Interfaces\r | |
15 | 1 0 0 0\r | |
16 | 16 1 0 4\r | |
17 | 128 2 0 7\r | |
18 | 512 3 0 9\r | |
19 | 1 KB 4 0 10\r | |
20 | 4 KB 5 0 12\r | |
21 | 32 KB 6 0 15\r | |
22 | 64 KB 7 0 16\r | |
23 | 128 KB 0 1 17\r | |
24 | 256 KB 1 1 18\r | |
25 | 512 KB 2 1 19\r | |
26 | 1 MB 3 1 20\r | |
27 | 2 MB 4 1 21\r | |
28 | 4 MB 5 1 22\r | |
29 | 8 MB 6 1 23\r | |
30 | 16 MB 7 1 24\r | |
5eddabfc SZ |
31 | **/\r |
32 | UINT8 mFvAttributes[] = {0, 4, 7, 9, 10, 12, 15, 16};\r | |
67a6cf6d | 33 | UINT8 mFvAttributes2[] = {17, 18, 19, 20, 21, 22, 23, 24};\r |
c2df8e13 | 34 | \r |
35 | /**\r | |
36 | Convert the FFS File Attributes to FV File Attributes.\r | |
37 | \r | |
38 | @param FfsAttributes The attributes of UINT8 type.\r | |
39 | \r | |
40 | @return The attributes of EFI_FV_FILE_ATTRIBUTES\r | |
41 | \r | |
42 | **/\r | |
43 | EFI_FV_FILE_ATTRIBUTES\r | |
44 | FfsAttributes2FvFileAttributes (\r | |
45 | IN EFI_FFS_FILE_ATTRIBUTES FfsAttributes\r | |
46 | )\r | |
47 | {\r | |
5eddabfc SZ |
48 | UINT8 DataAlignment;\r |
49 | EFI_FV_FILE_ATTRIBUTES FileAttribute;\r | |
50 | \r | |
51 | DataAlignment = (UINT8) ((FfsAttributes & FFS_ATTRIB_DATA_ALIGNMENT) >> 3);\r | |
52 | ASSERT (DataAlignment < 8);\r | |
53 | \r | |
67a6cf6d SZ |
54 | if ((FfsAttributes & FFS_ATTRIB_DATA_ALIGNMENT_2) != 0) {\r |
55 | FileAttribute = (EFI_FV_FILE_ATTRIBUTES) mFvAttributes2[DataAlignment];\r | |
56 | } else {\r | |
57 | FileAttribute = (EFI_FV_FILE_ATTRIBUTES) mFvAttributes[DataAlignment];\r | |
58 | }\r | |
5eddabfc SZ |
59 | \r |
60 | if ((FfsAttributes & FFS_ATTRIB_FIXED) == FFS_ATTRIB_FIXED) {\r | |
61 | FileAttribute |= EFI_FV_FILE_ATTRIB_FIXED;\r | |
62 | }\r | |
63 | \r | |
64 | return FileAttribute;\r | |
c2df8e13 | 65 | }\r |
66 | \r | |
67 | /**\r | |
68 | Given the input key, search for the next matching file in the volume.\r | |
69 | \r | |
70 | @param This Indicates the calling context.\r | |
71 | @param Key Key is a pointer to a caller allocated\r | |
72 | buffer that contains implementation specific\r | |
73 | data that is used to track where to begin\r | |
74 | the search for the next file. The size of\r | |
75 | the buffer must be at least This->KeySize\r | |
76 | bytes long. To reinitialize the search and\r | |
77 | begin from the beginning of the firmware\r | |
78 | volume, the entire buffer must be cleared to\r | |
79 | zero. Other than clearing the buffer to\r | |
80 | initiate a new search, the caller must not\r | |
81 | modify the data in the buffer between calls\r | |
82 | to GetNextFile().\r | |
83 | @param FileType FileType is a pointer to a caller allocated\r | |
84 | EFI_FV_FILETYPE. The GetNextFile() API can\r | |
85 | filter it's search for files based on the\r | |
86 | value of *FileType input. A *FileType input\r | |
87 | of 0 causes GetNextFile() to search for\r | |
88 | files of all types. If a file is found, the\r | |
89 | file's type is returned in *FileType.\r | |
90 | *FileType is not modified if no file is\r | |
91 | found.\r | |
92 | @param NameGuid NameGuid is a pointer to a caller allocated\r | |
93 | EFI_GUID. If a file is found, the file's\r | |
94 | name is returned in *NameGuid. *NameGuid is\r | |
95 | not modified if no file is found.\r | |
96 | @param Attributes Attributes is a pointer to a caller\r | |
97 | allocated EFI_FV_FILE_ATTRIBUTES. If a file\r | |
98 | is found, the file's attributes are returned\r | |
99 | in *Attributes. *Attributes is not modified\r | |
100 | if no file is found.\r | |
101 | @param Size Size is a pointer to a caller allocated\r | |
102 | UINTN. If a file is found, the file's size\r | |
103 | is returned in *Size. *Size is not modified\r | |
104 | if no file is found.\r | |
105 | \r | |
106 | @retval EFI_SUCCESS Successfully find the file.\r | |
107 | @retval EFI_DEVICE_ERROR Device error.\r | |
108 | @retval EFI_ACCESS_DENIED Fv could not read.\r | |
109 | @retval EFI_NOT_FOUND No matching file found.\r | |
110 | @retval EFI_INVALID_PARAMETER Invalid parameter\r | |
111 | \r | |
112 | **/\r | |
113 | EFI_STATUS\r | |
114 | EFIAPI\r | |
115 | FvGetNextFile (\r | |
116 | IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,\r | |
117 | IN OUT VOID *Key,\r | |
118 | IN OUT EFI_FV_FILETYPE *FileType,\r | |
119 | OUT EFI_GUID *NameGuid,\r | |
120 | OUT EFI_FV_FILE_ATTRIBUTES *Attributes,\r | |
121 | OUT UINTN *Size\r | |
122 | )\r | |
123 | {\r | |
124 | EFI_STATUS Status;\r | |
125 | FV_DEVICE *FvDevice;\r | |
126 | EFI_FV_ATTRIBUTES FvAttributes;\r | |
127 | EFI_FFS_FILE_HEADER *FfsFileHeader;\r | |
128 | UINTN *KeyValue;\r | |
129 | LIST_ENTRY *Link;\r | |
130 | FFS_FILE_LIST_ENTRY *FfsFileEntry;\r | |
c2df8e13 | 131 | \r |
132 | FvDevice = FV_DEVICE_FROM_THIS (This);\r | |
133 | \r | |
134 | Status = This->GetVolumeAttributes (This, &FvAttributes);\r | |
135 | if (EFI_ERROR (Status)) {\r | |
136 | return Status;\r | |
137 | }\r | |
138 | \r | |
139 | KeyValue = (UINTN *) Key;\r | |
140 | FfsFileHeader = NULL;\r | |
141 | \r | |
142 | //\r | |
143 | // Check if read operation is enabled\r | |
144 | //\r | |
145 | if ((FvAttributes & EFI_FV2_READ_STATUS) == 0) {\r | |
146 | return EFI_ACCESS_DENIED;\r | |
147 | }\r | |
148 | \r | |
149 | if (*FileType > EFI_FV_FILETYPE_SMM_CORE) {\r | |
150 | //\r | |
151 | // File type needs to be in 0 - 0x0D\r | |
152 | //\r | |
153 | return EFI_NOT_FOUND;\r | |
154 | }\r | |
155 | \r | |
156 | do {\r | |
157 | if (*KeyValue == 0) {\r | |
158 | //\r | |
159 | // Search for 1st matching file\r | |
160 | //\r | |
161 | Link = &FvDevice->FfsFileListHeader;\r | |
162 | if (Link->ForwardLink == &FvDevice->FfsFileListHeader) {\r | |
163 | return EFI_NOT_FOUND;\r | |
164 | }\r | |
165 | \r | |
166 | FfsFileEntry = (FFS_FILE_LIST_ENTRY *) Link->ForwardLink;\r | |
167 | FfsFileHeader = (EFI_FFS_FILE_HEADER *) FfsFileEntry->FfsHeader;\r | |
168 | \r | |
169 | //\r | |
170 | // remember the key\r | |
171 | //\r | |
172 | *KeyValue = (UINTN) FfsFileEntry;\r | |
173 | \r | |
174 | //\r | |
175 | // we ignore pad files\r | |
176 | //\r | |
177 | if (FfsFileHeader->Type == EFI_FV_FILETYPE_FFS_PAD) {\r | |
178 | continue;\r | |
179 | }\r | |
180 | \r | |
181 | if (*FileType == 0) {\r | |
182 | break;\r | |
183 | }\r | |
184 | \r | |
185 | if (*FileType == FfsFileHeader->Type) {\r | |
186 | break;\r | |
187 | }\r | |
188 | \r | |
189 | } else {\r | |
190 | //\r | |
191 | // Getting link from last Ffs\r | |
192 | //\r | |
193 | Link = (LIST_ENTRY *) (*KeyValue);\r | |
194 | if (Link->ForwardLink == &FvDevice->FfsFileListHeader) {\r | |
195 | return EFI_NOT_FOUND;\r | |
196 | }\r | |
197 | \r | |
198 | FfsFileEntry = (FFS_FILE_LIST_ENTRY *) Link->ForwardLink;\r | |
199 | FfsFileHeader = (EFI_FFS_FILE_HEADER *) FfsFileEntry->FfsHeader;\r | |
200 | \r | |
201 | //\r | |
202 | // remember the key\r | |
203 | //\r | |
204 | *KeyValue = (UINTN) FfsFileEntry;\r | |
205 | \r | |
206 | //\r | |
207 | // we ignore pad files\r | |
208 | //\r | |
209 | if (FfsFileHeader->Type == EFI_FV_FILETYPE_FFS_PAD) {\r | |
210 | continue;\r | |
211 | }\r | |
212 | \r | |
213 | if (*FileType == EFI_FV_FILETYPE_ALL) {\r | |
214 | break;\r | |
215 | }\r | |
216 | \r | |
217 | if (*FileType == FfsFileHeader->Type) {\r | |
218 | break;\r | |
219 | }\r | |
220 | }\r | |
221 | } while (Link->ForwardLink != &FvDevice->FfsFileListHeader);\r | |
222 | \r | |
223 | //\r | |
224 | // Cache this file entry\r | |
225 | //\r | |
226 | FvDevice->CurrentFfsFile = FfsFileEntry;\r | |
227 | \r | |
228 | *FileType = FfsFileHeader->Type;\r | |
229 | CopyGuid (NameGuid, &FfsFileHeader->Name);\r | |
230 | *Attributes = FfsAttributes2FvFileAttributes (FfsFileHeader->Attributes);\r | |
5eddabfc SZ |
231 | if ((FvDevice->FwVolHeader->Attributes & EFI_FVB2_MEMORY_MAPPED) == EFI_FVB2_MEMORY_MAPPED) {\r |
232 | *Attributes |= EFI_FV_FILE_ATTRIB_MEMORY_MAPPED;\r | |
233 | }\r | |
c2df8e13 | 234 | \r |
c2df8e13 | 235 | //\r |
236 | // we need to substract the header size\r | |
237 | //\r | |
23491d5c SZ |
238 | if (IS_FFS_FILE2 (FfsFileHeader)) {\r |
239 | *Size = FFS_FILE2_SIZE (FfsFileHeader) - sizeof (EFI_FFS_FILE_HEADER2);\r | |
240 | } else {\r | |
241 | *Size = FFS_FILE_SIZE (FfsFileHeader) - sizeof (EFI_FFS_FILE_HEADER);\r | |
242 | }\r | |
c2df8e13 | 243 | \r |
244 | if (CompareGuid (&gEfiFirmwareVolumeTopFileGuid, NameGuid)) {\r | |
245 | //\r | |
246 | // specially deal with VTF file\r | |
247 | //\r | |
248 | UINT8 *SrcPtr;\r | |
249 | UINT32 Tmp;\r | |
250 | \r | |
23491d5c SZ |
251 | if (IS_FFS_FILE2 (FfsFileHeader)) {\r |
252 | SrcPtr = ((UINT8 *) FfsFileHeader) + sizeof (EFI_FFS_FILE_HEADER2);\r | |
253 | } else {\r | |
254 | SrcPtr = ((UINT8 *) FfsFileHeader) + sizeof (EFI_FFS_FILE_HEADER);\r | |
255 | }\r | |
c2df8e13 | 256 | \r |
257 | while (*Size >= 4) {\r | |
258 | Tmp = *(UINT32 *) SrcPtr;\r | |
259 | if (Tmp == 0) {\r | |
260 | SrcPtr += 4;\r | |
261 | (*Size) -= 4;\r | |
262 | } else {\r | |
263 | break;\r | |
264 | }\r | |
265 | }\r | |
266 | }\r | |
267 | \r | |
268 | return EFI_SUCCESS;\r | |
269 | }\r | |
270 | \r | |
271 | /**\r | |
272 | Locates a file in the firmware volume and\r | |
273 | copies it to the supplied buffer.\r | |
274 | \r | |
275 | @param This Indicates the calling context.\r | |
276 | @param NameGuid Pointer to an EFI_GUID, which is the\r | |
277 | filename.\r | |
278 | @param Buffer Buffer is a pointer to pointer to a buffer\r | |
279 | in which the file or section contents or are\r | |
280 | returned.\r | |
281 | @param BufferSize BufferSize is a pointer to caller allocated\r | |
282 | UINTN. On input *BufferSize indicates the\r | |
283 | size in bytes of the memory region pointed\r | |
284 | to by Buffer. On output, *BufferSize\r | |
285 | contains the number of bytes required to\r | |
286 | read the file.\r | |
287 | @param FoundType FoundType is a pointer to a caller allocated\r | |
288 | EFI_FV_FILETYPE that on successful return\r | |
289 | from Read() contains the type of file read.\r | |
290 | This output reflects the file type\r | |
291 | irrespective of the value of the SectionType\r | |
292 | input.\r | |
293 | @param FileAttributes FileAttributes is a pointer to a caller\r | |
294 | allocated EFI_FV_FILE_ATTRIBUTES. On\r | |
295 | successful return from Read(),\r | |
296 | *FileAttributes contains the attributes of\r | |
297 | the file read.\r | |
298 | @param AuthenticationStatus AuthenticationStatus is a pointer to a\r | |
299 | caller allocated UINTN in which the\r | |
300 | authentication status is returned.\r | |
301 | \r | |
302 | @retval EFI_SUCCESS Successfully read to memory buffer.\r | |
303 | @retval EFI_WARN_BUFFER_TOO_SMALL Buffer too small.\r | |
304 | @retval EFI_NOT_FOUND Not found.\r | |
305 | @retval EFI_DEVICE_ERROR Device error.\r | |
306 | @retval EFI_ACCESS_DENIED Could not read.\r | |
307 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
308 | @retval EFI_OUT_OF_RESOURCES Not enough buffer to be allocated.\r | |
309 | \r | |
310 | **/\r | |
311 | EFI_STATUS\r | |
312 | EFIAPI\r | |
313 | FvReadFile (\r | |
314 | IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,\r | |
315 | IN CONST EFI_GUID *NameGuid,\r | |
316 | IN OUT VOID **Buffer,\r | |
317 | IN OUT UINTN *BufferSize,\r | |
318 | OUT EFI_FV_FILETYPE *FoundType,\r | |
319 | OUT EFI_FV_FILE_ATTRIBUTES *FileAttributes,\r | |
320 | OUT UINT32 *AuthenticationStatus\r | |
321 | )\r | |
322 | {\r | |
323 | EFI_STATUS Status;\r | |
324 | FV_DEVICE *FvDevice;\r | |
325 | UINTN Key;\r | |
326 | EFI_GUID SearchNameGuid;\r | |
327 | EFI_FV_ATTRIBUTES FvAttributes;\r | |
328 | EFI_FV_FILETYPE LocalFoundType;\r | |
329 | EFI_FV_FILE_ATTRIBUTES LocalAttributes;\r | |
330 | UINTN FileSize;\r | |
331 | UINT8 *SrcPtr;\r | |
332 | FFS_FILE_LIST_ENTRY *FfsFileEntry;\r | |
333 | EFI_FFS_FILE_HEADER *FfsHeader;\r | |
334 | UINT8 *FileBuffer;\r | |
335 | \r | |
336 | if (NULL == This || NULL == NameGuid) {\r | |
337 | return EFI_INVALID_PARAMETER;\r | |
338 | }\r | |
339 | \r | |
340 | FvDevice = FV_DEVICE_FROM_THIS (This);\r | |
341 | \r | |
342 | Status = This->GetVolumeAttributes (This, &FvAttributes);\r | |
343 | if (EFI_ERROR (Status)) {\r | |
344 | return Status;\r | |
345 | }\r | |
346 | //\r | |
347 | // First check to see that FV is enabled for reads...\r | |
348 | //\r | |
349 | if (0 == (FvAttributes & EFI_FV2_READ_STATUS)) {\r | |
350 | return EFI_ACCESS_DENIED;\r | |
351 | }\r | |
352 | \r | |
353 | FfsHeader = NULL;\r | |
354 | \r | |
355 | //\r | |
356 | // Check if the file was read last time.\r | |
357 | //\r | |
358 | FfsFileEntry = FvDevice->CurrentFfsFile;\r | |
359 | \r | |
360 | if (FfsFileEntry != NULL) {\r | |
361 | FfsHeader = (EFI_FFS_FILE_HEADER *) FfsFileEntry->FfsHeader;\r | |
362 | }\r | |
363 | \r | |
364 | if ((FfsFileEntry == NULL) || (!CompareGuid (&FfsHeader->Name, NameGuid))) {\r | |
365 | //\r | |
366 | // If not match or no file cached, search this file\r | |
367 | //\r | |
368 | Key = 0;\r | |
369 | do {\r | |
370 | LocalFoundType = 0;\r | |
371 | Status = This->GetNextFile (\r | |
372 | This,\r | |
373 | &Key,\r | |
374 | &LocalFoundType,\r | |
375 | &SearchNameGuid,\r | |
376 | &LocalAttributes,\r | |
377 | &FileSize\r | |
378 | );\r | |
379 | if (EFI_ERROR (Status)) {\r | |
380 | return EFI_NOT_FOUND;\r | |
381 | }\r | |
382 | } while (!CompareGuid (&SearchNameGuid, NameGuid));\r | |
383 | \r | |
384 | //\r | |
385 | // Get file entry\r | |
386 | //\r | |
387 | FfsFileEntry = (FFS_FILE_LIST_ENTRY *) Key;\r | |
388 | \r | |
389 | //\r | |
390 | // Update the cache\r | |
391 | //\r | |
392 | FvDevice->CurrentFfsFile = FfsFileEntry;\r | |
393 | \r | |
394 | FfsHeader = (EFI_FFS_FILE_HEADER *) FfsFileEntry->FfsHeader;\r | |
395 | \r | |
396 | } else {\r | |
397 | //\r | |
398 | // Get File Size of the cached file\r | |
399 | //\r | |
23491d5c SZ |
400 | if (IS_FFS_FILE2 (FfsHeader)) {\r |
401 | FileSize = FFS_FILE2_SIZE (FfsHeader) - sizeof (EFI_FFS_FILE_HEADER2);\r | |
402 | } else {\r | |
403 | FileSize = FFS_FILE_SIZE (FfsHeader) - sizeof (EFI_FFS_FILE_HEADER);\r | |
404 | }\r | |
c2df8e13 | 405 | }\r |
406 | //\r | |
407 | // Get file info\r | |
408 | //\r | |
409 | *FoundType = FfsHeader->Type;\r | |
410 | *FileAttributes = FfsAttributes2FvFileAttributes (FfsHeader->Attributes);\r | |
5eddabfc SZ |
411 | if ((FvDevice->FwVolHeader->Attributes & EFI_FVB2_MEMORY_MAPPED) == EFI_FVB2_MEMORY_MAPPED) {\r |
412 | *FileAttributes |= EFI_FV_FILE_ATTRIB_MEMORY_MAPPED;\r | |
413 | }\r | |
37136e06 SZ |
414 | //\r |
415 | // Inherit the authentication status.\r | |
416 | //\r | |
417 | *AuthenticationStatus = FvDevice->AuthenticationStatus;\r | |
c2df8e13 | 418 | \r |
419 | //\r | |
420 | // If Buffer is NULL, we only want to get some information\r | |
421 | //\r | |
422 | if (Buffer == NULL) {\r | |
423 | *BufferSize = FileSize;\r | |
424 | return EFI_SUCCESS;\r | |
425 | }\r | |
426 | \r | |
23491d5c SZ |
427 | if (IS_FFS_FILE2 (FfsHeader)) {\r |
428 | SrcPtr = ((UINT8 *) FfsHeader) + sizeof (EFI_FFS_FILE_HEADER2);\r | |
429 | } else {\r | |
430 | SrcPtr = ((UINT8 *) FfsHeader) + sizeof (EFI_FFS_FILE_HEADER);\r | |
431 | }\r | |
c2df8e13 | 432 | \r |
433 | if (CompareGuid (&gEfiFirmwareVolumeTopFileGuid, NameGuid)) {\r | |
434 | //\r | |
435 | // specially deal with VTF file\r | |
436 | //\r | |
437 | UINT32 Tmp;\r | |
438 | \r | |
439 | while (FileSize >= 4) {\r | |
440 | Tmp = *(UINT32 *) SrcPtr;\r | |
441 | if (Tmp == 0) {\r | |
442 | SrcPtr += 4;\r | |
443 | FileSize -= 4;\r | |
444 | } else {\r | |
445 | break;\r | |
446 | }\r | |
447 | }\r | |
448 | }\r | |
449 | //\r | |
450 | // If we drop out of the above loop, we've found the correct file header...\r | |
451 | //\r | |
452 | if (*Buffer == NULL) {\r | |
453 | FileBuffer = AllocateCopyPool (FileSize, SrcPtr);\r | |
454 | if (FileBuffer == NULL) {\r | |
455 | return EFI_OUT_OF_RESOURCES;\r | |
456 | }\r | |
457 | \r | |
458 | *BufferSize = FileSize;\r | |
459 | *Buffer = FileBuffer;\r | |
460 | \r | |
461 | return EFI_SUCCESS;\r | |
462 | }\r | |
463 | //\r | |
464 | // If the user's buffer is smaller than the file size, then copy as much\r | |
465 | // as we can and return an appropriate status.\r | |
466 | //\r | |
467 | if (FileSize > *BufferSize) {\r | |
468 | CopyMem (*Buffer, SrcPtr, *BufferSize);\r | |
469 | *BufferSize = FileSize;\r | |
470 | return EFI_WARN_BUFFER_TOO_SMALL;\r | |
471 | }\r | |
472 | //\r | |
473 | // User's buffer size is ok, so copy the entire file to their buffer.\r | |
474 | //\r | |
475 | *BufferSize = FileSize;\r | |
476 | CopyMem (*Buffer, SrcPtr, *BufferSize);\r | |
477 | \r | |
478 | return EFI_SUCCESS;\r | |
479 | }\r | |
480 | \r | |
481 | /**\r | |
482 | Locates a section in a given FFS File and\r | |
483 | copies it to the supplied buffer (not including section header).\r | |
484 | \r | |
485 | @param This Indicates the calling context.\r | |
486 | @param NameGuid Pointer to an EFI_GUID, which is the\r | |
487 | filename.\r | |
488 | @param SectionType Indicates the section type to return.\r | |
489 | @param SectionInstance Indicates which instance of sections with a\r | |
490 | type of SectionType to return.\r | |
491 | @param Buffer Buffer is a pointer to pointer to a buffer\r | |
492 | in which the file or section contents or are\r | |
493 | returned.\r | |
494 | @param BufferSize BufferSize is a pointer to caller allocated\r | |
495 | UINTN.\r | |
496 | @param AuthenticationStatus AuthenticationStatus is a pointer to a\r | |
497 | caller allocated UINT32 in which the\r | |
498 | authentication status is returned.\r | |
499 | \r | |
500 | @retval EFI_SUCCESS Successfully read the file section into\r | |
501 | buffer.\r | |
502 | @retval EFI_WARN_BUFFER_TOO_SMALL Buffer too small.\r | |
503 | @retval EFI_NOT_FOUND Section not found.\r | |
504 | @retval EFI_DEVICE_ERROR Device error.\r | |
505 | @retval EFI_ACCESS_DENIED Could not read.\r | |
506 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
507 | \r | |
508 | **/\r | |
509 | EFI_STATUS\r | |
510 | EFIAPI\r | |
511 | FvReadFileSection (\r | |
512 | IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,\r | |
513 | IN CONST EFI_GUID *NameGuid,\r | |
514 | IN EFI_SECTION_TYPE SectionType,\r | |
515 | IN UINTN SectionInstance,\r | |
516 | IN OUT VOID **Buffer,\r | |
517 | IN OUT UINTN *BufferSize,\r | |
518 | OUT UINT32 *AuthenticationStatus\r | |
519 | )\r | |
520 | {\r | |
521 | EFI_STATUS Status;\r | |
0c3a1db4 | 522 | FV_DEVICE *FvDevice;\r |
c2df8e13 | 523 | EFI_FV_ATTRIBUTES FvAttributes;\r |
524 | EFI_FV_FILETYPE FileType;\r | |
525 | EFI_FV_FILE_ATTRIBUTES FileAttributes;\r | |
526 | UINTN FileSize;\r | |
527 | UINT8 *FileBuffer;\r | |
528 | EFI_SECTION_EXTRACTION_PROTOCOL *Sep;\r | |
529 | UINTN StreamHandle;\r | |
530 | \r | |
531 | if (NULL == This || NULL == NameGuid || Buffer == NULL) {\r | |
532 | return EFI_INVALID_PARAMETER;\r | |
533 | }\r | |
534 | \r | |
0c3a1db4 SZ |
535 | FvDevice = FV_DEVICE_FROM_THIS (This);\r |
536 | \r | |
c2df8e13 | 537 | Status = This->GetVolumeAttributes (This, &FvAttributes);\r |
538 | if (EFI_ERROR (Status)) {\r | |
539 | return Status;\r | |
540 | }\r | |
541 | //\r | |
542 | // First check to see that FV is enabled for reads...\r | |
543 | //\r | |
544 | if (0 == (FvAttributes & EFI_FV2_READ_STATUS)) {\r | |
545 | return EFI_ACCESS_DENIED;\r | |
546 | }\r | |
547 | //\r | |
548 | // Read the whole file into buffer\r | |
549 | //\r | |
550 | FileBuffer = NULL;\r | |
551 | Status = This->ReadFile (\r | |
552 | This,\r | |
553 | NameGuid,\r | |
554 | (VOID **) &FileBuffer,\r | |
555 | &FileSize,\r | |
556 | &FileType,\r | |
557 | &FileAttributes,\r | |
558 | AuthenticationStatus\r | |
559 | );\r | |
560 | \r | |
561 | if (EFI_ERROR (Status)) {\r | |
562 | return Status;\r | |
563 | }\r | |
564 | //\r | |
565 | // Check to see that the file actually HAS sections before we go any further.\r | |
566 | //\r | |
567 | if (FileType == EFI_FV_FILETYPE_RAW) {\r | |
568 | FreePool (FileBuffer);\r | |
569 | return EFI_NOT_FOUND;\r | |
570 | }\r | |
571 | //\r | |
572 | // Located the protocol\r | |
573 | //\r | |
574 | Status = gBS->LocateProtocol (\r | |
575 | &gEfiSectionExtractionProtocolGuid,\r | |
576 | NULL,\r | |
577 | (VOID **) &Sep\r | |
578 | );\r | |
579 | if (EFI_ERROR (Status)) {\r | |
580 | FreePool (FileBuffer);\r | |
581 | return Status;\r | |
582 | }\r | |
583 | \r | |
584 | Status = Sep->OpenSectionStream (\r | |
585 | Sep,\r | |
586 | FileSize,\r | |
587 | FileBuffer,\r | |
588 | &StreamHandle\r | |
589 | );\r | |
590 | \r | |
591 | if (EFI_ERROR (Status)) {\r | |
592 | FreePool (FileBuffer);\r | |
593 | return Status;\r | |
594 | }\r | |
595 | \r | |
596 | if (SectionType == 0) {\r | |
597 | //\r | |
598 | // We need the whole section stream\r | |
599 | //\r | |
600 | Status = Sep->GetSection (\r | |
601 | Sep,\r | |
602 | StreamHandle,\r | |
603 | NULL,\r | |
604 | NULL,\r | |
605 | 0,\r | |
606 | Buffer,\r | |
607 | BufferSize,\r | |
608 | AuthenticationStatus\r | |
609 | );\r | |
610 | } else {\r | |
611 | Status = Sep->GetSection (\r | |
612 | Sep,\r | |
613 | StreamHandle,\r | |
614 | &SectionType,\r | |
615 | NULL,\r | |
616 | SectionInstance,\r | |
617 | Buffer,\r | |
618 | BufferSize,\r | |
619 | AuthenticationStatus\r | |
620 | );\r | |
621 | }\r | |
0c3a1db4 SZ |
622 | \r |
623 | if (!EFI_ERROR (Status)) {\r | |
624 | //\r | |
625 | // Inherit the authentication status.\r | |
626 | //\r | |
627 | *AuthenticationStatus |= FvDevice->AuthenticationStatus;\r | |
628 | }\r | |
629 | \r | |
c2df8e13 | 630 | //\r |
631 | // Handle AuthenticationStatus if necessary\r | |
632 | //\r | |
633 | Sep->CloseSectionStream (Sep, StreamHandle);\r | |
634 | \r | |
635 | FreePool (FileBuffer);\r | |
636 | \r | |
637 | return Status;\r | |
638 | }\r |