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30fdf114 LG |
1 | /** @file\r |
2 | \r | |
40d841f6 LG |
3 | Copyright (c) 1999 - 2008, Intel Corporation. All rights reserved.<BR>\r |
4 | This program and the accompanying materials\r | |
30fdf114 LG |
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 | FirmwareVolumeBuffer.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | EFI Firmware Volume routines which work on a Fv image in buffers.\r | |
19 | \r | |
20 | **/\r | |
21 | \r | |
22 | #include "FirmwareVolumeBufferLib.h"\r | |
23 | #include "BinderFuncs.h"\r | |
24 | \r | |
25 | //\r | |
26 | // Local macros\r | |
27 | //\r | |
28 | #define EFI_TEST_FFS_ATTRIBUTES_BIT(FvbAttributes, TestAttributes, Bit) \\r | |
29 | ( \\r | |
30 | (BOOLEAN) ( \\r | |
31 | (FvbAttributes & EFI_FVB2_ERASE_POLARITY) ? (((~TestAttributes) & Bit) == Bit) : ((TestAttributes & Bit) == Bit) \\r | |
32 | ) \\r | |
33 | )\r | |
34 | \r | |
35 | \r | |
36 | //\r | |
37 | // Local prototypes\r | |
38 | //\r | |
39 | \r | |
40 | STATIC\r | |
41 | UINT16\r | |
42 | FvBufCalculateChecksum16 (\r | |
43 | IN UINT16 *Buffer,\r | |
44 | IN UINTN Size\r | |
45 | );\r | |
46 | \r | |
47 | STATIC\r | |
48 | UINT8\r | |
49 | FvBufCalculateChecksum8 (\r | |
50 | IN UINT8 *Buffer,\r | |
51 | IN UINTN Size\r | |
52 | );\r | |
53 | \r | |
54 | //\r | |
55 | // Procedures start\r | |
56 | //\r | |
57 | \r | |
58 | EFI_STATUS\r | |
59 | FvBufRemoveFileNew (\r | |
60 | IN OUT VOID *Fv,\r | |
61 | IN EFI_GUID *Name\r | |
62 | )\r | |
63 | /*++\r | |
64 | \r | |
65 | Routine Description:\r | |
66 | \r | |
67 | Clears out all files from the Fv buffer in memory\r | |
68 | \r | |
69 | Arguments:\r | |
70 | \r | |
71 | SourceFv - Address of the Fv in memory, this firmware volume volume will\r | |
72 | be modified, if SourceFfsFile exists\r | |
73 | SourceFfsFile - Input FFS file to replace\r | |
74 | \r | |
75 | Returns:\r | |
76 | \r | |
77 | EFI_SUCCESS\r | |
78 | EFI_NOT_FOUND\r | |
79 | \r | |
80 | --*/\r | |
81 | {\r | |
82 | EFI_STATUS Status;\r | |
83 | EFI_FFS_FILE_HEADER* FileToRm;\r | |
84 | UINTN FileToRmLength;\r | |
85 | \r | |
86 | Status = FvBufFindFileByName(\r | |
87 | Fv,\r | |
88 | Name,\r | |
89 | (VOID **)&FileToRm\r | |
90 | );\r | |
91 | if (EFI_ERROR (Status)) {\r | |
92 | return Status;\r | |
93 | }\r | |
94 | \r | |
95 | FileToRmLength = FvBufExpand3ByteSize (FileToRm->Size);\r | |
96 | \r | |
97 | CommonLibBinderSetMem (\r | |
98 | FileToRm,\r | |
99 | FileToRmLength,\r | |
100 | (((EFI_FIRMWARE_VOLUME_HEADER*)Fv)->Attributes & EFI_FVB2_ERASE_POLARITY)\r | |
101 | ? 0xFF : 0\r | |
102 | );\r | |
103 | \r | |
104 | return EFI_SUCCESS;\r | |
105 | }\r | |
106 | \r | |
107 | \r | |
108 | EFI_STATUS\r | |
109 | FvBufRemoveFile (\r | |
110 | IN OUT VOID *Fv,\r | |
111 | IN EFI_GUID *Name\r | |
112 | )\r | |
113 | /*++\r | |
114 | \r | |
115 | Routine Description:\r | |
116 | \r | |
117 | Clears out all files from the Fv buffer in memory\r | |
118 | \r | |
119 | Arguments:\r | |
120 | \r | |
121 | SourceFv - Address of the Fv in memory, this firmware volume volume will\r | |
122 | be modified, if SourceFfsFile exists\r | |
123 | SourceFfsFile - Input FFS file to replace\r | |
124 | \r | |
125 | Returns:\r | |
126 | \r | |
127 | EFI_SUCCESS\r | |
128 | EFI_NOT_FOUND\r | |
129 | \r | |
130 | --*/\r | |
131 | {\r | |
132 | EFI_STATUS Status;\r | |
133 | EFI_FFS_FILE_HEADER *NextFile;\r | |
134 | EFI_FIRMWARE_VOLUME_HEADER *TempFv;\r | |
135 | UINTN FileKey;\r | |
136 | UINTN FvLength;\r | |
137 | \r | |
138 | Status = FvBufFindFileByName(\r | |
139 | Fv,\r | |
140 | Name,\r | |
141 | NULL\r | |
142 | );\r | |
143 | if (EFI_ERROR (Status)) {\r | |
144 | return Status;\r | |
145 | }\r | |
146 | \r | |
147 | Status = FvBufGetSize (Fv, &FvLength);\r | |
148 | if (EFI_ERROR (Status)) {\r | |
149 | return Status;\r | |
150 | }\r | |
151 | \r | |
152 | TempFv = NULL;\r | |
153 | Status = FvBufDuplicate (Fv, (VOID **)&TempFv);\r | |
154 | if (EFI_ERROR (Status)) {\r | |
155 | return Status;\r | |
156 | }\r | |
157 | \r | |
158 | Status = FvBufClearAllFiles (TempFv);\r | |
159 | if (EFI_ERROR (Status)) {\r | |
160 | return Status;\r | |
161 | }\r | |
162 | \r | |
163 | // TempFv has been allocated. It must now be freed\r | |
164 | // before returning.\r | |
165 | \r | |
166 | FileKey = 0;\r | |
167 | while (TRUE) {\r | |
168 | \r | |
169 | Status = FvBufFindNextFile (Fv, &FileKey, (VOID **)&NextFile);\r | |
170 | if (Status == EFI_NOT_FOUND) {\r | |
171 | break;\r | |
172 | } else if (EFI_ERROR (Status)) {\r | |
173 | CommonLibBinderFree (TempFv);\r | |
174 | return Status;\r | |
175 | }\r | |
176 | \r | |
177 | if (CommonLibBinderCompareGuid (Name, &NextFile->Name)) {\r | |
178 | continue;\r | |
179 | }\r | |
180 | else {\r | |
181 | Status = FvBufAddFile (TempFv, NextFile);\r | |
182 | if (EFI_ERROR (Status)) {\r | |
183 | CommonLibBinderFree (TempFv);\r | |
184 | return Status;\r | |
185 | }\r | |
186 | }\r | |
187 | }\r | |
188 | \r | |
189 | CommonLibBinderCopyMem (Fv, TempFv, FvLength);\r | |
190 | CommonLibBinderFree (TempFv);\r | |
191 | \r | |
192 | return EFI_SUCCESS;\r | |
193 | }\r | |
194 | \r | |
195 | \r | |
196 | EFI_STATUS\r | |
197 | FvBufChecksumFile (\r | |
198 | IN OUT VOID *FfsFile\r | |
199 | )\r | |
200 | /*++\r | |
201 | \r | |
202 | Routine Description:\r | |
203 | \r | |
204 | Clears out all files from the Fv buffer in memory\r | |
205 | \r | |
206 | Arguments:\r | |
207 | \r | |
208 | SourceFfsFile - Input FFS file to update the checksum for\r | |
209 | \r | |
210 | Returns:\r | |
211 | \r | |
212 | EFI_SUCCESS\r | |
213 | EFI_NOT_FOUND\r | |
214 | \r | |
215 | --*/\r | |
216 | {\r | |
217 | EFI_FFS_FILE_HEADER* File = (EFI_FFS_FILE_HEADER*)FfsFile;\r | |
218 | EFI_FFS_FILE_STATE StateBackup;\r | |
219 | UINT32 FileSize;\r | |
220 | \r | |
221 | FileSize = FvBufExpand3ByteSize (File->Size);\r | |
222 | \r | |
223 | //\r | |
224 | // Fill in checksums and state, they must be 0 for checksumming.\r | |
225 | //\r | |
226 | File->IntegrityCheck.Checksum.Header = 0;\r | |
227 | File->IntegrityCheck.Checksum.File = 0;\r | |
228 | StateBackup = File->State;\r | |
229 | File->State = 0;\r | |
230 | \r | |
231 | File->IntegrityCheck.Checksum.Header =\r | |
232 | FvBufCalculateChecksum8 (\r | |
233 | (UINT8 *) File,\r | |
234 | sizeof (EFI_FFS_FILE_HEADER)\r | |
235 | );\r | |
236 | \r | |
237 | if (File->Attributes & FFS_ATTRIB_CHECKSUM) {\r | |
238 | File->IntegrityCheck.Checksum.File = FvBufCalculateChecksum8 (\r | |
b303ea72 LG |
239 | (VOID*)(File + 1),\r |
240 | FileSize - sizeof (EFI_FFS_FILE_HEADER)\r | |
30fdf114 LG |
241 | );\r |
242 | } else {\r | |
243 | File->IntegrityCheck.Checksum.File = FFS_FIXED_CHECKSUM;\r | |
244 | }\r | |
245 | \r | |
246 | File->State = StateBackup;\r | |
247 | \r | |
248 | return EFI_SUCCESS;\r | |
249 | }\r | |
250 | \r | |
251 | \r | |
252 | EFI_STATUS\r | |
253 | FvBufChecksumHeader (\r | |
254 | IN OUT VOID *Fv\r | |
255 | )\r | |
256 | /*++\r | |
257 | \r | |
258 | Routine Description:\r | |
259 | \r | |
260 | Clears out all files from the Fv buffer in memory\r | |
261 | \r | |
262 | Arguments:\r | |
263 | \r | |
264 | SourceFv - Address of the Fv in memory, this firmware volume volume will\r | |
265 | be modified, if SourceFfsFile exists\r | |
266 | SourceFfsFile - Input FFS file to replace\r | |
267 | \r | |
268 | Returns:\r | |
269 | \r | |
270 | EFI_SUCCESS\r | |
271 | EFI_NOT_FOUND\r | |
272 | \r | |
273 | --*/\r | |
274 | {\r | |
275 | EFI_FIRMWARE_VOLUME_HEADER* FvHeader = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
276 | \r | |
277 | FvHeader->Checksum = 0;\r | |
278 | FvHeader->Checksum =\r | |
279 | FvBufCalculateChecksum16 (\r | |
280 | (UINT16*) FvHeader,\r | |
281 | FvHeader->HeaderLength / sizeof (UINT16)\r | |
282 | );\r | |
283 | \r | |
284 | return EFI_SUCCESS;\r | |
285 | }\r | |
286 | \r | |
287 | \r | |
288 | EFI_STATUS\r | |
289 | FvBufDuplicate (\r | |
290 | IN VOID *SourceFv,\r | |
291 | IN OUT VOID **DestinationFv\r | |
292 | )\r | |
293 | /*++\r | |
294 | \r | |
295 | Routine Description:\r | |
296 | \r | |
297 | Clears out all files from the Fv buffer in memory\r | |
298 | \r | |
299 | Arguments:\r | |
300 | \r | |
301 | SourceFv - Address of the Fv in memory\r | |
302 | DestinationFv - Output for destination Fv\r | |
303 | DestinationFv == NULL - invalid parameter\r | |
304 | *DestinationFv == NULL - memory will be allocated\r | |
305 | *DestinationFv != NULL - this address will be the destination\r | |
306 | \r | |
307 | Returns:\r | |
308 | \r | |
309 | EFI_SUCCESS\r | |
310 | \r | |
311 | --*/\r | |
312 | {\r | |
313 | EFI_STATUS Status;\r | |
314 | UINTN size;\r | |
315 | \r | |
316 | if (DestinationFv == NULL) {\r | |
317 | return EFI_INVALID_PARAMETER;\r | |
318 | }\r | |
319 | \r | |
320 | Status = FvBufGetSize (SourceFv, &size);\r | |
321 | if (EFI_ERROR (Status)) {\r | |
322 | return Status;\r | |
323 | }\r | |
324 | \r | |
325 | if (*DestinationFv == NULL) {\r | |
326 | *DestinationFv = CommonLibBinderAllocate (size);\r | |
327 | }\r | |
328 | \r | |
329 | CommonLibBinderCopyMem (*DestinationFv, SourceFv, size);\r | |
330 | \r | |
331 | return EFI_SUCCESS;\r | |
332 | }\r | |
333 | \r | |
334 | \r | |
335 | EFI_STATUS\r | |
336 | FvBufExtend (\r | |
337 | IN VOID **Fv,\r | |
338 | IN UINTN Size\r | |
339 | )\r | |
340 | /*++\r | |
341 | \r | |
342 | Routine Description:\r | |
343 | \r | |
344 | Extends a firmware volume by the given number of bytes.\r | |
345 | \r | |
346 | BUGBUG: Does not handle the case where the firmware volume has a\r | |
347 | VTF (Volume Top File). The VTF will not be moved to the\r | |
348 | end of the extended FV.\r | |
349 | \r | |
350 | Arguments:\r | |
351 | \r | |
352 | Fv - Source and destination firmware volume.\r | |
353 | Note: The original firmware volume buffer is freed!\r | |
354 | \r | |
355 | Size - The minimum size that the firmware volume is to be extended by.\r | |
356 | The FV may be extended more than this size.\r | |
357 | \r | |
358 | Returns:\r | |
359 | \r | |
360 | EFI_SUCCESS\r | |
361 | \r | |
362 | --*/\r | |
363 | {\r | |
364 | EFI_STATUS Status;\r | |
365 | UINTN OldSize;\r | |
366 | UINTN NewSize;\r | |
367 | UINTN BlockCount;\r | |
368 | VOID* NewFv;\r | |
369 | \r | |
370 | EFI_FIRMWARE_VOLUME_HEADER* hdr;\r | |
371 | EFI_FV_BLOCK_MAP_ENTRY* blk;\r | |
372 | \r | |
373 | Status = FvBufGetSize (*Fv, &OldSize);\r | |
374 | if (EFI_ERROR (Status)) {\r | |
375 | return Status;\r | |
376 | }\r | |
377 | \r | |
378 | //\r | |
379 | // Locate the block map in the fv header\r | |
380 | //\r | |
381 | hdr = (EFI_FIRMWARE_VOLUME_HEADER*)*Fv;\r | |
382 | blk = hdr->BlockMap;\r | |
383 | \r | |
384 | //\r | |
385 | // Calculate the number of blocks needed to achieve the requested\r | |
386 | // size extension\r | |
387 | //\r | |
388 | BlockCount = ((Size + (blk->Length - 1)) / blk->Length);\r | |
389 | \r | |
390 | //\r | |
391 | // Calculate the new size from the number of blocks that will be added\r | |
392 | //\r | |
393 | NewSize = OldSize + (BlockCount * blk->Length);\r | |
394 | \r | |
395 | NewFv = CommonLibBinderAllocate (NewSize);\r | |
396 | if (NewFv == NULL) {\r | |
397 | return EFI_OUT_OF_RESOURCES;\r | |
398 | }\r | |
399 | \r | |
400 | //\r | |
401 | // Copy the old data\r | |
402 | //\r | |
403 | CommonLibBinderCopyMem (NewFv, *Fv, OldSize);\r | |
404 | \r | |
405 | //\r | |
406 | // Free the old fv buffer\r | |
407 | //\r | |
408 | CommonLibBinderFree (*Fv);\r | |
409 | \r | |
410 | //\r | |
411 | // Locate the block map in the new fv header\r | |
412 | //\r | |
413 | hdr = (EFI_FIRMWARE_VOLUME_HEADER*)NewFv;\r | |
414 | hdr->FvLength = NewSize;\r | |
415 | blk = hdr->BlockMap;\r | |
416 | \r | |
417 | //\r | |
418 | // Update the block map for the new fv\r | |
419 | //\r | |
420 | blk->NumBlocks += (UINT32)BlockCount;\r | |
421 | \r | |
422 | //\r | |
423 | // Update the FV header checksum\r | |
424 | //\r | |
425 | FvBufChecksumHeader (NewFv);\r | |
426 | \r | |
427 | //\r | |
428 | // Clear out the new area of the FV\r | |
429 | //\r | |
430 | CommonLibBinderSetMem (\r | |
431 | (UINT8*)NewFv + OldSize,\r | |
432 | (NewSize - OldSize),\r | |
433 | (hdr->Attributes & EFI_FVB2_ERASE_POLARITY) ? 0xFF : 0\r | |
434 | );\r | |
435 | \r | |
436 | //\r | |
437 | // Set output with new fv that was created\r | |
438 | //\r | |
439 | *Fv = NewFv;\r | |
440 | \r | |
441 | return EFI_SUCCESS;\r | |
442 | \r | |
443 | }\r | |
444 | \r | |
445 | \r | |
446 | EFI_STATUS\r | |
447 | FvBufClearAllFiles (\r | |
448 | IN OUT VOID *Fv\r | |
449 | )\r | |
450 | /*++\r | |
451 | \r | |
452 | Routine Description:\r | |
453 | \r | |
454 | Clears out all files from the Fv buffer in memory\r | |
455 | \r | |
456 | Arguments:\r | |
457 | \r | |
458 | Fv - Address of the Fv in memory\r | |
459 | \r | |
460 | Returns:\r | |
461 | \r | |
462 | EFI_SUCCESS\r | |
463 | \r | |
464 | --*/\r | |
465 | \r | |
466 | {\r | |
467 | EFI_FIRMWARE_VOLUME_HEADER *hdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
468 | EFI_STATUS Status;\r | |
469 | UINTN size = 0;\r | |
470 | \r | |
471 | Status = FvBufGetSize (Fv, &size);\r | |
472 | if (EFI_ERROR (Status)) {\r | |
473 | return Status;\r | |
474 | }\r | |
475 | \r | |
476 | CommonLibBinderSetMem(\r | |
477 | (UINT8*)hdr + hdr->HeaderLength,\r | |
478 | size - hdr->HeaderLength,\r | |
479 | (hdr->Attributes & EFI_FVB2_ERASE_POLARITY) ? 0xFF : 0\r | |
480 | );\r | |
481 | \r | |
482 | return EFI_SUCCESS;\r | |
483 | }\r | |
484 | \r | |
485 | \r | |
486 | EFI_STATUS\r | |
487 | FvBufGetSize (\r | |
488 | IN VOID *Fv,\r | |
489 | OUT UINTN *Size\r | |
490 | )\r | |
491 | /*++\r | |
492 | \r | |
493 | Routine Description:\r | |
494 | \r | |
495 | Clears out all files from the Fv buffer in memory\r | |
496 | \r | |
497 | Arguments:\r | |
498 | \r | |
499 | Fv - Address of the Fv in memory\r | |
500 | \r | |
501 | Returns:\r | |
502 | \r | |
503 | EFI_SUCCESS\r | |
504 | \r | |
505 | --*/\r | |
506 | \r | |
507 | {\r | |
508 | EFI_FIRMWARE_VOLUME_HEADER *hdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
509 | EFI_FV_BLOCK_MAP_ENTRY *blk = hdr->BlockMap;\r | |
510 | \r | |
511 | *Size = 0;\r | |
512 | \r | |
513 | while (blk->Length != 0 || blk->NumBlocks != 0) {\r | |
514 | *Size = *Size + (blk->Length * blk->NumBlocks);\r | |
515 | if (*Size >= 0x40000000) {\r | |
516 | // If size is greater than 1GB, then assume it is corrupted\r | |
517 | return EFI_VOLUME_CORRUPTED;\r | |
518 | }\r | |
519 | blk++;\r | |
520 | }\r | |
521 | \r | |
522 | if (*Size == 0) {\r | |
523 | // If size is 0, then assume the volume is corrupted\r | |
524 | return EFI_VOLUME_CORRUPTED;\r | |
525 | }\r | |
526 | \r | |
527 | return EFI_SUCCESS;\r | |
528 | }\r | |
529 | \r | |
530 | \r | |
531 | EFI_STATUS\r | |
532 | FvBufAddFile (\r | |
533 | IN OUT VOID *Fv,\r | |
534 | IN VOID *File\r | |
535 | )\r | |
536 | /*++\r | |
537 | \r | |
538 | Routine Description:\r | |
539 | \r | |
540 | Adds a new FFS file\r | |
541 | \r | |
542 | Arguments:\r | |
543 | \r | |
544 | Fv - Address of the Fv in memory\r | |
545 | File - FFS file to add to Fv\r | |
546 | \r | |
547 | Returns:\r | |
548 | \r | |
549 | EFI_SUCCESS\r | |
550 | \r | |
551 | --*/\r | |
552 | {\r | |
553 | EFI_FIRMWARE_VOLUME_HEADER *hdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
554 | \r | |
555 | EFI_FFS_FILE_HEADER *fhdr = NULL;\r | |
556 | EFI_FVB_ATTRIBUTES FvbAttributes;\r | |
557 | UINTN offset;\r | |
558 | UINTN fsize;\r | |
559 | UINTN newSize;\r | |
560 | UINTN clearLoop;\r | |
561 | \r | |
562 | EFI_STATUS Status;\r | |
563 | UINTN fvSize;\r | |
564 | \r | |
565 | Status = FvBufGetSize (Fv, &fvSize);\r | |
566 | if (EFI_ERROR (Status)) {\r | |
567 | return Status;\r | |
568 | }\r | |
569 | \r | |
570 | FvbAttributes = hdr->Attributes;\r | |
571 | newSize = FvBufExpand3ByteSize (((EFI_FFS_FILE_HEADER*)File)->Size);\r | |
572 | \r | |
573 | for(\r | |
574 | offset = (UINTN)ALIGN_POINTER (hdr->HeaderLength, 8);\r | |
575 | offset + newSize <= fvSize;\r | |
576 | offset = (UINTN)ALIGN_POINTER (offset, 8)\r | |
577 | ) {\r | |
578 | \r | |
579 | fhdr = (EFI_FFS_FILE_HEADER*) ((UINT8*)hdr + offset);\r | |
580 | \r | |
581 | if (EFI_TEST_FFS_ATTRIBUTES_BIT(\r | |
582 | FvbAttributes,\r | |
583 | fhdr->State,\r | |
584 | EFI_FILE_HEADER_VALID\r | |
585 | )\r | |
586 | ) {\r | |
587 | // BUGBUG: Need to make sure that the new file does not already\r | |
588 | // exist.\r | |
589 | \r | |
590 | fsize = FvBufExpand3ByteSize (fhdr->Size);\r | |
591 | if (fsize == 0 || (offset + fsize > fvSize)) {\r | |
592 | return EFI_VOLUME_CORRUPTED;\r | |
593 | }\r | |
594 | \r | |
595 | offset = offset + fsize;\r | |
596 | continue;\r | |
597 | }\r | |
598 | \r | |
599 | clearLoop = 0;\r | |
600 | while ((clearLoop < newSize) &&\r | |
601 | (((UINT8*)fhdr)[clearLoop] ==\r | |
602 | (UINT8)((hdr->Attributes & EFI_FVB2_ERASE_POLARITY) ? 0xFF : 0)\r | |
603 | )\r | |
604 | ) {\r | |
605 | clearLoop++;\r | |
606 | }\r | |
607 | \r | |
608 | //\r | |
609 | // We found a place in the FV which is empty and big enough for\r | |
610 | // the new file\r | |
611 | //\r | |
612 | if (clearLoop >= newSize) {\r | |
613 | break;\r | |
614 | }\r | |
615 | \r | |
616 | offset = offset + 1; // Make some forward progress\r | |
617 | }\r | |
618 | \r | |
619 | if (offset + newSize > fvSize) {\r | |
620 | return EFI_OUT_OF_RESOURCES;\r | |
621 | }\r | |
622 | \r | |
623 | CommonLibBinderCopyMem (fhdr, File, newSize);\r | |
624 | \r | |
625 | return EFI_SUCCESS;\r | |
626 | }\r | |
627 | \r | |
628 | \r | |
629 | EFI_STATUS\r | |
630 | FvBufAddFileWithExtend (\r | |
631 | IN OUT VOID **Fv,\r | |
632 | IN VOID *File\r | |
633 | )\r | |
634 | /*++\r | |
635 | \r | |
636 | Routine Description:\r | |
637 | \r | |
638 | Adds a new FFS file. Extends the firmware volume if needed.\r | |
639 | \r | |
640 | Arguments:\r | |
641 | \r | |
642 | Fv - Source and destination firmware volume.\r | |
643 | Note: If the FV is extended, then the original firmware volume\r | |
644 | buffer is freed!\r | |
645 | \r | |
646 | Size - The minimum size that the firmware volume is to be extended by.\r | |
647 | The FV may be extended more than this size.\r | |
648 | \r | |
649 | Returns:\r | |
650 | \r | |
651 | EFI_SUCCESS\r | |
652 | \r | |
653 | --*/\r | |
654 | {\r | |
655 | EFI_STATUS Status;\r | |
656 | EFI_FFS_FILE_HEADER* NewFile;\r | |
657 | \r | |
658 | NewFile = (EFI_FFS_FILE_HEADER*)File;\r | |
659 | \r | |
660 | //\r | |
661 | // Try to add to the capsule volume\r | |
662 | //\r | |
663 | Status = FvBufAddFile (*Fv, NewFile);\r | |
664 | if (Status == EFI_OUT_OF_RESOURCES) {\r | |
665 | //\r | |
666 | // Try to extend the capsule volume by the size of the file\r | |
667 | //\r | |
668 | Status = FvBufExtend (Fv, FvBufExpand3ByteSize (NewFile->Size));\r | |
669 | if (EFI_ERROR (Status)) {\r | |
670 | return Status;\r | |
671 | }\r | |
672 | \r | |
673 | //\r | |
674 | // Now, try to add the file again\r | |
675 | //\r | |
676 | Status = FvBufAddFile (*Fv, NewFile);\r | |
677 | }\r | |
678 | \r | |
679 | return Status;\r | |
680 | }\r | |
681 | \r | |
682 | \r | |
683 | EFI_STATUS\r | |
684 | FvBufAddVtfFile (\r | |
685 | IN OUT VOID *Fv,\r | |
686 | IN VOID *File\r | |
687 | )\r | |
688 | /*++\r | |
689 | \r | |
690 | Routine Description:\r | |
691 | \r | |
692 | Adds a new FFS VFT (Volume Top File) file. In other words, adds the\r | |
693 | file to the end of the firmware volume.\r | |
694 | \r | |
695 | Arguments:\r | |
696 | \r | |
697 | Fv - Address of the Fv in memory\r | |
698 | File - FFS file to add to Fv\r | |
699 | \r | |
700 | Returns:\r | |
701 | \r | |
702 | EFI_SUCCESS\r | |
703 | \r | |
704 | --*/\r | |
705 | {\r | |
706 | EFI_STATUS Status;\r | |
707 | \r | |
708 | EFI_FIRMWARE_VOLUME_HEADER *hdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
709 | \r | |
710 | EFI_FFS_FILE_HEADER* NewFile;\r | |
711 | UINTN NewFileSize;\r | |
712 | \r | |
713 | UINT8 erasedUint8;\r | |
714 | UINTN clearLoop;\r | |
715 | \r | |
716 | EFI_FFS_FILE_HEADER *LastFile;\r | |
717 | UINTN LastFileSize;\r | |
718 | \r | |
719 | UINTN fvSize;\r | |
720 | UINTN Key;\r | |
721 | \r | |
722 | Status = FvBufGetSize (Fv, &fvSize);\r | |
723 | if (EFI_ERROR (Status)) {\r | |
724 | return Status;\r | |
725 | }\r | |
726 | \r | |
727 | erasedUint8 = (UINT8)((hdr->Attributes & EFI_FVB2_ERASE_POLARITY) ? 0xFF : 0);\r | |
728 | NewFileSize = FvBufExpand3ByteSize (((EFI_FFS_FILE_HEADER*)File)->Size);\r | |
729 | \r | |
730 | if (NewFileSize != (UINTN)ALIGN_POINTER (NewFileSize, 8)) {\r | |
731 | return EFI_INVALID_PARAMETER;\r | |
732 | }\r | |
733 | \r | |
734 | //\r | |
735 | // Find the last file in the FV\r | |
736 | //\r | |
737 | Key = 0;\r | |
738 | LastFile = NULL;\r | |
739 | LastFileSize = 0;\r | |
740 | do {\r | |
741 | Status = FvBufFindNextFile (Fv, &Key, (VOID **)&LastFile);\r | |
742 | LastFileSize = FvBufExpand3ByteSize (((EFI_FFS_FILE_HEADER*)File)->Size);\r | |
743 | } while (!EFI_ERROR (Status));\r | |
744 | \r | |
745 | //\r | |
746 | // If no files were found, then we start at the beginning of the FV\r | |
747 | //\r | |
748 | if (LastFile == NULL) {\r | |
749 | LastFile = (EFI_FFS_FILE_HEADER*)((UINT8*)hdr + hdr->HeaderLength);\r | |
750 | }\r | |
751 | \r | |
752 | //\r | |
753 | // We want to put the new file (VTF) at the end of the FV\r | |
754 | //\r | |
755 | NewFile = (EFI_FFS_FILE_HEADER*)((UINT8*)hdr + (fvSize - NewFileSize));\r | |
756 | \r | |
757 | //\r | |
758 | // Check to see if there is enough room for the VTF after the last file\r | |
759 | // found in the FV\r | |
760 | //\r | |
761 | if ((UINT8*)NewFile < ((UINT8*)LastFile + LastFileSize)) {\r | |
762 | return EFI_OUT_OF_RESOURCES;\r | |
763 | }\r | |
764 | \r | |
765 | //\r | |
766 | // Loop to determine if the end of the FV is empty\r | |
767 | //\r | |
768 | clearLoop = 0;\r | |
769 | while ((clearLoop < NewFileSize) &&\r | |
770 | (((UINT8*)NewFile)[clearLoop] == erasedUint8)\r | |
771 | ) {\r | |
772 | clearLoop++;\r | |
773 | }\r | |
774 | \r | |
775 | //\r | |
776 | // Check to see if there was not enough room for the file\r | |
777 | //\r | |
778 | if (clearLoop < NewFileSize) {\r | |
779 | return EFI_OUT_OF_RESOURCES;\r | |
780 | }\r | |
781 | \r | |
782 | CommonLibBinderCopyMem (NewFile, File, NewFileSize);\r | |
783 | \r | |
784 | return EFI_SUCCESS;\r | |
785 | }\r | |
786 | \r | |
787 | \r | |
788 | VOID\r | |
789 | FvBufCompact3ByteSize (\r | |
790 | OUT VOID* SizeDest,\r | |
791 | IN UINT32 Size\r | |
792 | )\r | |
793 | /*++\r | |
794 | \r | |
795 | Routine Description:\r | |
796 | \r | |
797 | Expands the 3 byte size commonly used in Firmware Volume data structures\r | |
798 | \r | |
799 | Arguments:\r | |
800 | \r | |
801 | Size - Address of the 3 byte array representing the size\r | |
802 | \r | |
803 | Returns:\r | |
804 | \r | |
805 | UINT32\r | |
806 | \r | |
807 | --*/\r | |
808 | {\r | |
809 | ((UINT8*)SizeDest)[0] = (UINT8)Size;\r | |
810 | ((UINT8*)SizeDest)[1] = (UINT8)(Size >> 8);\r | |
811 | ((UINT8*)SizeDest)[2] = (UINT8)(Size >> 16);\r | |
812 | }\r | |
813 | \r | |
814 | UINT32\r | |
815 | FvBufExpand3ByteSize (\r | |
816 | IN VOID* Size\r | |
817 | )\r | |
818 | /*++\r | |
819 | \r | |
820 | Routine Description:\r | |
821 | \r | |
822 | Expands the 3 byte size commonly used in Firmware Volume data structures\r | |
823 | \r | |
824 | Arguments:\r | |
825 | \r | |
826 | Size - Address of the 3 byte array representing the size\r | |
827 | \r | |
828 | Returns:\r | |
829 | \r | |
830 | UINT32\r | |
831 | \r | |
832 | --*/\r | |
833 | {\r | |
834 | return (((UINT8*)Size)[2] << 16) +\r | |
835 | (((UINT8*)Size)[1] << 8) +\r | |
836 | ((UINT8*)Size)[0];\r | |
837 | }\r | |
838 | \r | |
839 | EFI_STATUS\r | |
840 | FvBufFindNextFile (\r | |
841 | IN VOID *Fv,\r | |
842 | IN OUT UINTN *Key,\r | |
843 | OUT VOID **File\r | |
844 | )\r | |
845 | /*++\r | |
846 | \r | |
847 | Routine Description:\r | |
848 | \r | |
849 | Iterates through the files contained within the firmware volume\r | |
850 | \r | |
851 | Arguments:\r | |
852 | \r | |
853 | Fv - Address of the Fv in memory\r | |
854 | Key - Should be 0 to get the first file. After that, it should be\r | |
855 | passed back in without modifying it's contents to retrieve\r | |
856 | subsequent files.\r | |
857 | File - Output file pointer\r | |
858 | File == NULL - invalid parameter\r | |
859 | otherwise - *File will be update to the location of the file\r | |
860 | \r | |
861 | Returns:\r | |
862 | \r | |
863 | EFI_SUCCESS\r | |
864 | EFI_NOT_FOUND\r | |
865 | EFI_VOLUME_CORRUPTED\r | |
866 | \r | |
867 | --*/\r | |
868 | {\r | |
869 | EFI_FIRMWARE_VOLUME_HEADER *hdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
870 | \r | |
871 | EFI_FFS_FILE_HEADER *fhdr = NULL;\r | |
872 | EFI_FVB_ATTRIBUTES FvbAttributes;\r | |
873 | UINTN fsize;\r | |
874 | \r | |
875 | EFI_STATUS Status;\r | |
876 | UINTN fvSize;\r | |
877 | \r | |
878 | if (Fv == NULL) {\r | |
879 | return EFI_INVALID_PARAMETER;\r | |
880 | }\r | |
881 | \r | |
882 | Status = FvBufGetSize (Fv, &fvSize);\r | |
883 | if (EFI_ERROR (Status)) {\r | |
884 | return Status;\r | |
885 | }\r | |
886 | \r | |
887 | if (*Key == 0) {\r | |
888 | *Key = hdr->HeaderLength;\r | |
889 | }\r | |
890 | \r | |
891 | FvbAttributes = hdr->Attributes;\r | |
892 | \r | |
893 | for(\r | |
894 | *Key = (UINTN)ALIGN_POINTER (*Key, 8);\r | |
895 | (*Key + sizeof (*fhdr)) < fvSize;\r | |
896 | *Key = (UINTN)ALIGN_POINTER (*Key, 8)\r | |
897 | ) {\r | |
898 | \r | |
899 | fhdr = (EFI_FFS_FILE_HEADER*) ((UINT8*)hdr + *Key);\r | |
900 | fsize = FvBufExpand3ByteSize (fhdr->Size);\r | |
901 | \r | |
902 | if (!EFI_TEST_FFS_ATTRIBUTES_BIT(\r | |
903 | FvbAttributes,\r | |
904 | fhdr->State,\r | |
905 | EFI_FILE_HEADER_VALID\r | |
906 | ) ||\r | |
907 | EFI_TEST_FFS_ATTRIBUTES_BIT(\r | |
908 | FvbAttributes,\r | |
909 | fhdr->State,\r | |
910 | EFI_FILE_HEADER_INVALID\r | |
911 | )\r | |
912 | ) {\r | |
913 | *Key = *Key + 1; // Make some forward progress\r | |
914 | continue;\r | |
915 | } else if(\r | |
916 | EFI_TEST_FFS_ATTRIBUTES_BIT(\r | |
917 | FvbAttributes,\r | |
918 | fhdr->State,\r | |
919 | EFI_FILE_MARKED_FOR_UPDATE\r | |
920 | ) ||\r | |
921 | EFI_TEST_FFS_ATTRIBUTES_BIT(\r | |
922 | FvbAttributes,\r | |
923 | fhdr->State,\r | |
924 | EFI_FILE_DELETED\r | |
925 | )\r | |
926 | ) {\r | |
927 | *Key = *Key + fsize;\r | |
928 | continue;\r | |
929 | } else if (EFI_TEST_FFS_ATTRIBUTES_BIT(\r | |
930 | FvbAttributes,\r | |
931 | fhdr->State,\r | |
932 | EFI_FILE_DATA_VALID\r | |
933 | )\r | |
934 | ) {\r | |
935 | *File = (UINT8*)hdr + *Key;\r | |
936 | *Key = *Key + fsize;\r | |
937 | return EFI_SUCCESS;\r | |
938 | }\r | |
939 | \r | |
940 | *Key = *Key + 1; // Make some forward progress\r | |
941 | }\r | |
942 | \r | |
943 | return EFI_NOT_FOUND;\r | |
944 | }\r | |
945 | \r | |
946 | \r | |
947 | EFI_STATUS\r | |
948 | FvBufFindFileByName (\r | |
949 | IN VOID *Fv,\r | |
950 | IN EFI_GUID *Name,\r | |
951 | OUT VOID **File\r | |
952 | )\r | |
953 | /*++\r | |
954 | \r | |
955 | Routine Description:\r | |
956 | \r | |
957 | Searches the Fv for a file by its name\r | |
958 | \r | |
959 | Arguments:\r | |
960 | \r | |
961 | Fv - Address of the Fv in memory\r | |
962 | Name - Guid filename to search for in the firmware volume\r | |
963 | File - Output file pointer\r | |
964 | File == NULL - Only determine if the file exists, based on return\r | |
965 | value from the function call.\r | |
966 | otherwise - *File will be update to the location of the file\r | |
967 | \r | |
968 | Returns:\r | |
969 | \r | |
970 | EFI_SUCCESS\r | |
971 | EFI_NOT_FOUND\r | |
972 | EFI_VOLUME_CORRUPTED\r | |
973 | \r | |
974 | --*/\r | |
975 | {\r | |
976 | EFI_STATUS Status;\r | |
977 | UINTN Key;\r | |
978 | EFI_FFS_FILE_HEADER *NextFile;\r | |
979 | \r | |
980 | Key = 0;\r | |
981 | while (TRUE) {\r | |
982 | Status = FvBufFindNextFile (Fv, &Key, (VOID **)&NextFile);\r | |
983 | if (EFI_ERROR (Status)) {\r | |
984 | return Status;\r | |
985 | }\r | |
986 | \r | |
987 | if (CommonLibBinderCompareGuid (Name, &NextFile->Name)) {\r | |
988 | if (File != NULL) {\r | |
989 | *File = NextFile;\r | |
990 | }\r | |
991 | return EFI_SUCCESS;\r | |
992 | }\r | |
993 | }\r | |
994 | \r | |
995 | return EFI_NOT_FOUND;\r | |
996 | }\r | |
997 | \r | |
998 | \r | |
999 | EFI_STATUS\r | |
1000 | FvBufFindFileByType (\r | |
1001 | IN VOID *Fv,\r | |
1002 | IN EFI_FV_FILETYPE Type,\r | |
1003 | OUT VOID **File\r | |
1004 | )\r | |
1005 | /*++\r | |
1006 | \r | |
1007 | Routine Description:\r | |
1008 | \r | |
1009 | Searches the Fv for a file by its type\r | |
1010 | \r | |
1011 | Arguments:\r | |
1012 | \r | |
1013 | Fv - Address of the Fv in memory\r | |
1014 | Type - FFS FILE type to search for\r | |
1015 | File - Output file pointer\r | |
1016 | (File == NULL) -> Only determine if the file exists, based on return\r | |
1017 | value from the function call.\r | |
1018 | otherwise -> *File will be update to the location of the file\r | |
1019 | \r | |
1020 | Returns:\r | |
1021 | \r | |
1022 | EFI_SUCCESS\r | |
1023 | EFI_NOT_FOUND\r | |
1024 | EFI_VOLUME_CORRUPTED\r | |
1025 | \r | |
1026 | --*/\r | |
1027 | {\r | |
1028 | EFI_STATUS Status;\r | |
1029 | UINTN Key;\r | |
1030 | EFI_FFS_FILE_HEADER *NextFile;\r | |
1031 | \r | |
1032 | Key = 0;\r | |
1033 | while (TRUE) {\r | |
1034 | Status = FvBufFindNextFile (Fv, &Key, (VOID **)&NextFile);\r | |
1035 | if (EFI_ERROR (Status)) {\r | |
1036 | return Status;\r | |
1037 | }\r | |
1038 | \r | |
1039 | if (Type == NextFile->Type) {\r | |
1040 | if (File != NULL) {\r | |
1041 | *File = NextFile;\r | |
1042 | }\r | |
1043 | return EFI_SUCCESS;\r | |
1044 | }\r | |
1045 | }\r | |
1046 | \r | |
1047 | return EFI_NOT_FOUND;\r | |
1048 | }\r | |
1049 | \r | |
1050 | \r | |
1051 | EFI_STATUS\r | |
1052 | FvBufGetFileRawData (\r | |
1053 | IN VOID* FfsFile,\r | |
1054 | OUT VOID** RawData,\r | |
1055 | OUT UINTN* RawDataSize\r | |
1056 | )\r | |
1057 | /*++\r | |
1058 | \r | |
1059 | Routine Description:\r | |
1060 | \r | |
1061 | Searches the requested file for raw data.\r | |
1062 | \r | |
1063 | This routine either returns all the payload of a EFI_FV_FILETYPE_RAW file,\r | |
1064 | or finds the EFI_SECTION_RAW section within the file and returns its data.\r | |
1065 | \r | |
1066 | Arguments:\r | |
1067 | \r | |
1068 | FfsFile - Address of the FFS file in memory\r | |
1069 | RawData - Pointer to the raw data within the file\r | |
1070 | (This is NOT allocated. It is within the file.)\r | |
1071 | RawDataSize - Size of the raw data within the file\r | |
1072 | \r | |
1073 | Returns:\r | |
1074 | \r | |
1075 | EFI_STATUS\r | |
1076 | \r | |
1077 | --*/\r | |
1078 | {\r | |
1079 | EFI_STATUS Status;\r | |
1080 | EFI_FFS_FILE_HEADER* File;\r | |
1081 | EFI_RAW_SECTION* Section;\r | |
1082 | \r | |
1083 | File = (EFI_FFS_FILE_HEADER*)FfsFile;\r | |
1084 | \r | |
1085 | //\r | |
1086 | // Is the file type == EFI_FV_FILETYPE_RAW?\r | |
1087 | //\r | |
1088 | if (File->Type == EFI_FV_FILETYPE_RAW) {\r | |
1089 | //\r | |
1090 | // Raw filetypes don't have sections, so we just return the raw data\r | |
1091 | //\r | |
1092 | *RawData = (VOID*)(File + 1);\r | |
1093 | *RawDataSize = FvBufExpand3ByteSize (File->Size) - sizeof (*File);\r | |
1094 | return EFI_SUCCESS;\r | |
1095 | }\r | |
1096 | \r | |
1097 | //\r | |
1098 | // Within the file, we now need to find the EFI_SECTION_RAW section.\r | |
1099 | //\r | |
1100 | Status = FvBufFindSectionByType (File, EFI_SECTION_RAW, (VOID **)&Section);\r | |
1101 | if (EFI_ERROR (Status)) {\r | |
1102 | return Status;\r | |
1103 | }\r | |
1104 | \r | |
1105 | *RawData = (VOID*)(Section + 1);\r | |
1106 | *RawDataSize =\r | |
1107 | FvBufExpand3ByteSize (Section->Size) - sizeof (*Section);\r | |
1108 | \r | |
1109 | return EFI_SUCCESS;\r | |
1110 | \r | |
1111 | }\r | |
1112 | \r | |
1113 | \r | |
1114 | EFI_STATUS\r | |
1115 | FvBufPackageFreeformRawFile (\r | |
1116 | IN EFI_GUID* Filename,\r | |
1117 | IN VOID* RawData,\r | |
1118 | IN UINTN RawDataSize,\r | |
1119 | OUT VOID** FfsFile\r | |
1120 | )\r | |
1121 | /*++\r | |
1122 | \r | |
1123 | Routine Description:\r | |
1124 | \r | |
1125 | Packages up a FFS file containing the input raw data.\r | |
1126 | \r | |
1127 | The file created will have a type of EFI_FV_FILETYPE_FREEFORM, and will\r | |
1128 | contain one EFI_FV_FILETYPE_RAW section.\r | |
1129 | \r | |
1130 | Arguments:\r | |
1131 | \r | |
1132 | RawData - Pointer to the raw data to be packed\r | |
1133 | RawDataSize - Size of the raw data to be packed\r | |
1134 | FfsFile - Address of the packaged FFS file.\r | |
1135 | Note: The called must deallocate this memory!\r | |
1136 | \r | |
1137 | Returns:\r | |
1138 | \r | |
1139 | EFI_STATUS\r | |
1140 | \r | |
1141 | --*/\r | |
1142 | {\r | |
1143 | EFI_FFS_FILE_HEADER* NewFile;\r | |
1144 | UINT32 NewFileSize;\r | |
1145 | EFI_RAW_SECTION* NewSection;\r | |
1146 | UINT32 NewSectionSize;\r | |
1147 | \r | |
1148 | //\r | |
1149 | // The section size is the DataSize + the size of the section header\r | |
1150 | //\r | |
1151 | NewSectionSize = (UINT32)sizeof (EFI_RAW_SECTION) + (UINT32)RawDataSize;\r | |
1152 | \r | |
1153 | //\r | |
1154 | // The file size is the size of the file header + the section size\r | |
1155 | //\r | |
1156 | NewFileSize = sizeof (EFI_FFS_FILE_HEADER) + NewSectionSize;\r | |
1157 | \r | |
1158 | //\r | |
1159 | // Try to allocate a buffer to build the new FFS file in\r | |
1160 | //\r | |
1161 | NewFile = CommonLibBinderAllocate (NewFileSize);\r | |
1162 | if (NewFile == NULL) {\r | |
1163 | return EFI_OUT_OF_RESOURCES;\r | |
1164 | }\r | |
1165 | CommonLibBinderSetMem (NewFile, NewFileSize, 0);\r | |
1166 | \r | |
1167 | //\r | |
1168 | // The NewSection follow right after the FFS file header\r | |
1169 | //\r | |
1170 | NewSection = (EFI_RAW_SECTION*)(NewFile + 1);\r | |
1171 | FvBufCompact3ByteSize (NewSection->Size, NewSectionSize);\r | |
1172 | NewSection->Type = EFI_SECTION_RAW;\r | |
1173 | \r | |
1174 | //\r | |
1175 | // Copy the actual file data into the buffer\r | |
1176 | //\r | |
1177 | CommonLibBinderCopyMem (NewSection + 1, RawData, RawDataSize);\r | |
1178 | \r | |
1179 | //\r | |
1180 | // Initialize the FFS file header\r | |
1181 | //\r | |
1182 | CommonLibBinderCopyMem (&NewFile->Name, Filename, sizeof (EFI_GUID));\r | |
1183 | FvBufCompact3ByteSize (NewFile->Size, NewFileSize);\r | |
1184 | NewFile->Type = EFI_FV_FILETYPE_FREEFORM;\r | |
1185 | NewFile->Attributes = 0;\r | |
1186 | NewFile->IntegrityCheck.Checksum.Header =\r | |
1187 | FvBufCalculateChecksum8 ((UINT8*)NewFile, sizeof (*NewFile));\r | |
1188 | NewFile->IntegrityCheck.Checksum.File = FFS_FIXED_CHECKSUM;\r | |
1189 | NewFile->State = (UINT8)~( EFI_FILE_HEADER_CONSTRUCTION |\r | |
1190 | EFI_FILE_HEADER_VALID |\r | |
1191 | EFI_FILE_DATA_VALID\r | |
1192 | );\r | |
1193 | \r | |
1194 | *FfsFile = NewFile;\r | |
1195 | \r | |
1196 | return EFI_SUCCESS;\r | |
1197 | }\r | |
1198 | \r | |
1199 | \r | |
1200 | EFI_STATUS\r | |
1201 | FvBufFindNextSection (\r | |
1202 | IN VOID *SectionsStart,\r | |
1203 | IN UINTN TotalSectionsSize,\r | |
1204 | IN OUT UINTN *Key,\r | |
1205 | OUT VOID **Section\r | |
1206 | )\r | |
1207 | /*++\r | |
1208 | \r | |
1209 | Routine Description:\r | |
1210 | \r | |
1211 | Iterates through the sections contained within a given array of sections\r | |
1212 | \r | |
1213 | Arguments:\r | |
1214 | \r | |
1215 | SectionsStart - Address of the start of the FFS sections array\r | |
1216 | TotalSectionsSize - Total size of all the sections\r | |
1217 | Key - Should be 0 to get the first section. After that, it should be\r | |
1218 | passed back in without modifying it's contents to retrieve\r | |
1219 | subsequent files.\r | |
1220 | Section - Output section pointer\r | |
1221 | (Section == NULL) -> invalid parameter\r | |
1222 | otherwise -> *Section will be update to the location of the file\r | |
1223 | \r | |
1224 | Returns:\r | |
1225 | \r | |
1226 | EFI_SUCCESS\r | |
1227 | EFI_NOT_FOUND\r | |
1228 | EFI_VOLUME_CORRUPTED\r | |
1229 | \r | |
1230 | --*/\r | |
1231 | {\r | |
1232 | EFI_COMMON_SECTION_HEADER *sectionHdr;\r | |
1233 | UINTN sectionSize;\r | |
1234 | \r | |
1235 | *Key = (UINTN)ALIGN_POINTER (*Key, 4); // Sections are DWORD aligned\r | |
1236 | \r | |
1237 | if ((*Key + sizeof (*sectionHdr)) > TotalSectionsSize) {\r | |
1238 | return EFI_NOT_FOUND;\r | |
1239 | }\r | |
1240 | \r | |
1241 | sectionHdr = (EFI_COMMON_SECTION_HEADER*)((UINT8*)SectionsStart + *Key);\r | |
1242 | sectionSize = FvBufExpand3ByteSize (sectionHdr->Size);\r | |
1243 | \r | |
1244 | if (sectionSize < sizeof (EFI_COMMON_SECTION_HEADER)) {\r | |
1245 | return EFI_NOT_FOUND;\r | |
1246 | }\r | |
1247 | \r | |
1248 | if ((*Key + sectionSize) > TotalSectionsSize) {\r | |
1249 | return EFI_NOT_FOUND;\r | |
1250 | }\r | |
1251 | \r | |
1252 | *Section = (UINT8*)sectionHdr;\r | |
1253 | *Key = *Key + sectionSize;\r | |
1254 | return EFI_SUCCESS;\r | |
1255 | \r | |
1256 | }\r | |
1257 | \r | |
1258 | \r | |
1259 | EFI_STATUS\r | |
1260 | FvBufCountSections (\r | |
1261 | IN VOID* FfsFile,\r | |
1262 | IN UINTN* Count\r | |
1263 | )\r | |
1264 | /*++\r | |
1265 | \r | |
1266 | Routine Description:\r | |
1267 | \r | |
1268 | Searches the FFS file and counts the number of sections found.\r | |
1269 | The sections are NOT recursed.\r | |
1270 | \r | |
1271 | Arguments:\r | |
1272 | \r | |
1273 | FfsFile - Address of the FFS file in memory\r | |
1274 | Count - The location to store the section count in\r | |
1275 | \r | |
1276 | Returns:\r | |
1277 | \r | |
1278 | EFI_SUCCESS\r | |
1279 | EFI_NOT_FOUND\r | |
1280 | EFI_VOLUME_CORRUPTED\r | |
1281 | \r | |
1282 | --*/\r | |
1283 | {\r | |
1284 | EFI_STATUS Status;\r | |
1285 | UINTN Key;\r | |
1286 | VOID* SectionStart;\r | |
1287 | UINTN TotalSectionsSize;\r | |
1288 | EFI_COMMON_SECTION_HEADER* NextSection;\r | |
1289 | \r | |
1290 | SectionStart = (VOID*)((UINTN)FfsFile + sizeof (EFI_FFS_FILE_HEADER));\r | |
1291 | TotalSectionsSize =\r | |
1292 | FvBufExpand3ByteSize (((EFI_FFS_FILE_HEADER*)FfsFile)->Size) -\r | |
1293 | sizeof (EFI_FFS_FILE_HEADER);\r | |
1294 | Key = 0;\r | |
1295 | *Count = 0;\r | |
1296 | while (TRUE) {\r | |
1297 | Status = FvBufFindNextSection (\r | |
1298 | SectionStart,\r | |
1299 | TotalSectionsSize,\r | |
1300 | &Key,\r | |
1301 | (VOID **)&NextSection\r | |
1302 | );\r | |
1303 | if (Status == EFI_NOT_FOUND) {\r | |
1304 | return EFI_SUCCESS;\r | |
1305 | } else if (EFI_ERROR (Status)) {\r | |
1306 | return Status;\r | |
1307 | }\r | |
1308 | \r | |
1309 | //\r | |
1310 | // Increment the section counter\r | |
1311 | //\r | |
1312 | *Count += 1;\r | |
1313 | \r | |
1314 | }\r | |
1315 | \r | |
1316 | return EFI_NOT_FOUND;\r | |
1317 | }\r | |
1318 | \r | |
1319 | \r | |
1320 | EFI_STATUS\r | |
1321 | FvBufFindSectionByType (\r | |
1322 | IN VOID *FfsFile,\r | |
1323 | IN UINT8 Type,\r | |
1324 | OUT VOID **Section\r | |
1325 | )\r | |
1326 | /*++\r | |
1327 | \r | |
1328 | Routine Description:\r | |
1329 | \r | |
1330 | Searches the FFS file for a section by its type\r | |
1331 | \r | |
1332 | Arguments:\r | |
1333 | \r | |
1334 | FfsFile - Address of the FFS file in memory\r | |
1335 | Type - FFS FILE section type to search for\r | |
1336 | Section - Output section pointer\r | |
1337 | (Section == NULL) -> Only determine if the section exists, based on return\r | |
1338 | value from the function call.\r | |
1339 | otherwise -> *Section will be update to the location of the file\r | |
1340 | \r | |
1341 | Returns:\r | |
1342 | \r | |
1343 | EFI_SUCCESS\r | |
1344 | EFI_NOT_FOUND\r | |
1345 | EFI_VOLUME_CORRUPTED\r | |
1346 | \r | |
1347 | --*/\r | |
1348 | {\r | |
1349 | EFI_STATUS Status;\r | |
1350 | UINTN Key;\r | |
1351 | VOID* SectionStart;\r | |
1352 | UINTN TotalSectionsSize;\r | |
1353 | EFI_COMMON_SECTION_HEADER* NextSection;\r | |
1354 | \r | |
1355 | SectionStart = (VOID*)((UINTN)FfsFile + sizeof (EFI_FFS_FILE_HEADER));\r | |
1356 | TotalSectionsSize =\r | |
1357 | FvBufExpand3ByteSize (((EFI_FFS_FILE_HEADER*)FfsFile)->Size) -\r | |
1358 | sizeof (EFI_FFS_FILE_HEADER);\r | |
1359 | Key = 0;\r | |
1360 | while (TRUE) {\r | |
1361 | Status = FvBufFindNextSection (\r | |
1362 | SectionStart,\r | |
1363 | TotalSectionsSize,\r | |
1364 | &Key,\r | |
1365 | (VOID **)&NextSection\r | |
1366 | );\r | |
1367 | if (EFI_ERROR (Status)) {\r | |
1368 | return Status;\r | |
1369 | }\r | |
1370 | \r | |
1371 | if (Type == NextSection->Type) {\r | |
1372 | if (Section != NULL) {\r | |
1373 | *Section = NextSection;\r | |
1374 | }\r | |
1375 | return EFI_SUCCESS;\r | |
1376 | }\r | |
1377 | }\r | |
1378 | \r | |
1379 | return EFI_NOT_FOUND;\r | |
1380 | }\r | |
1381 | \r | |
1382 | \r | |
1383 | EFI_STATUS\r | |
1384 | FvBufShrinkWrap (\r | |
1385 | IN VOID *Fv\r | |
1386 | )\r | |
1387 | /*++\r | |
1388 | \r | |
1389 | Routine Description:\r | |
1390 | \r | |
1391 | Shrinks a firmware volume (in place) to provide a minimal FV.\r | |
1392 | \r | |
1393 | BUGBUG: Does not handle the case where the firmware volume has a\r | |
1394 | VTF (Volume Top File). The VTF will not be moved to the\r | |
1395 | end of the extended FV.\r | |
1396 | \r | |
1397 | Arguments:\r | |
1398 | \r | |
1399 | Fv - Firmware volume.\r | |
1400 | \r | |
1401 | Returns:\r | |
1402 | \r | |
1403 | EFI_SUCCESS\r | |
1404 | \r | |
1405 | --*/\r | |
1406 | {\r | |
1407 | EFI_STATUS Status;\r | |
1408 | UINTN OldSize;\r | |
1409 | UINT32 BlockCount;\r | |
1410 | UINT32 NewBlockSize = 128;\r | |
1411 | UINTN Key;\r | |
1412 | EFI_FFS_FILE_HEADER* FileIt;\r | |
1413 | VOID* EndOfLastFile;\r | |
1414 | \r | |
1415 | EFI_FIRMWARE_VOLUME_HEADER* FvHdr;\r | |
1416 | \r | |
1417 | Status = FvBufGetSize (Fv, &OldSize);\r | |
1418 | if (EFI_ERROR (Status)) {\r | |
1419 | return Status;\r | |
1420 | }\r | |
1421 | \r | |
1422 | Status = FvBufUnifyBlockSizes (Fv, NewBlockSize);\r | |
1423 | if (EFI_ERROR (Status)) {\r | |
1424 | return Status;\r | |
1425 | }\r | |
1426 | \r | |
1427 | //\r | |
1428 | // Locate the block map in the fv header\r | |
1429 | //\r | |
1430 | FvHdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
1431 | \r | |
1432 | //\r | |
1433 | // Find the end of the last file\r | |
1434 | //\r | |
1435 | Key = 0;\r | |
1436 | EndOfLastFile = (UINT8*)FvHdr + FvHdr->FvLength;\r | |
1437 | while (!EFI_ERROR (FvBufFindNextFile (Fv, &Key, (VOID **)&FileIt))) {\r | |
1438 | EndOfLastFile =\r | |
1439 | (VOID*)((UINT8*)FileIt + FvBufExpand3ByteSize (FileIt->Size));\r | |
1440 | }\r | |
1441 | \r | |
1442 | //\r | |
1443 | // Set the BlockCount to have the minimal number of blocks for the Fv.\r | |
1444 | //\r | |
1445 | BlockCount = (UINT32)((UINTN)EndOfLastFile - (UINTN)Fv);\r | |
1446 | BlockCount = BlockCount + NewBlockSize - 1;\r | |
1447 | BlockCount = BlockCount / NewBlockSize;\r | |
1448 | \r | |
1449 | //\r | |
1450 | // Adjust the block count to shrink the Fv in place.\r | |
1451 | //\r | |
1452 | FvHdr->BlockMap[0].NumBlocks = BlockCount;\r | |
1453 | FvHdr->FvLength = BlockCount * NewBlockSize;\r | |
1454 | \r | |
1455 | //\r | |
1456 | // Update the FV header checksum\r | |
1457 | //\r | |
1458 | FvBufChecksumHeader (Fv);\r | |
1459 | \r | |
1460 | return EFI_SUCCESS;\r | |
1461 | \r | |
1462 | }\r | |
1463 | \r | |
1464 | \r | |
1465 | EFI_STATUS\r | |
1466 | FvBufUnifyBlockSizes (\r | |
1467 | IN OUT VOID *Fv,\r | |
1468 | IN UINTN BlockSize\r | |
1469 | )\r | |
1470 | /*++\r | |
1471 | \r | |
1472 | Routine Description:\r | |
1473 | \r | |
1474 | Searches the FFS file for a section by its type\r | |
1475 | \r | |
1476 | Arguments:\r | |
1477 | \r | |
1478 | Fv - Address of the Fv in memory\r | |
1479 | BlockSize - The size of the blocks to convert the Fv to. If the total size\r | |
1480 | of the Fv is not evenly divisible by this size, then\r | |
1481 | EFI_INVALID_PARAMETER will be returned.\r | |
1482 | \r | |
1483 | Returns:\r | |
1484 | \r | |
1485 | EFI_SUCCESS\r | |
1486 | EFI_NOT_FOUND\r | |
1487 | EFI_VOLUME_CORRUPTED\r | |
1488 | \r | |
1489 | --*/\r | |
1490 | {\r | |
1491 | EFI_FIRMWARE_VOLUME_HEADER *hdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
1492 | EFI_FV_BLOCK_MAP_ENTRY *blk = hdr->BlockMap;\r | |
1493 | UINT32 Size;\r | |
1494 | \r | |
1495 | Size = 0;\r | |
1496 | \r | |
1497 | //\r | |
1498 | // Scan through the block map list, performing error checking, and adding\r | |
1499 | // up the total Fv size.\r | |
1500 | //\r | |
1501 | while( blk->Length != 0 ||\r | |
1502 | blk->NumBlocks != 0\r | |
1503 | ) {\r | |
1504 | Size = Size + (blk->Length * blk->NumBlocks);\r | |
1505 | blk++;\r | |
1506 | if ((UINT8*)blk > ((UINT8*)hdr + hdr->HeaderLength)) {\r | |
1507 | return EFI_VOLUME_CORRUPTED;\r | |
1508 | }\r | |
1509 | }\r | |
1510 | \r | |
1511 | //\r | |
1512 | // Make sure that the Fv size is a multiple of the new block size.\r | |
1513 | //\r | |
1514 | if ((Size % BlockSize) != 0) {\r | |
1515 | return EFI_INVALID_PARAMETER;\r | |
1516 | }\r | |
1517 | \r | |
1518 | //\r | |
1519 | // Zero out the entire block map.\r | |
1520 | //\r | |
1521 | CommonLibBinderSetMem (\r | |
1522 | &hdr->BlockMap,\r | |
1523 | (UINTN)blk - (UINTN)&hdr->BlockMap,\r | |
1524 | 0\r | |
1525 | );\r | |
1526 | \r | |
1527 | //\r | |
1528 | // Write out the single block map entry.\r | |
1529 | //\r | |
1530 | hdr->BlockMap[0].Length = (UINT32)BlockSize;\r | |
1531 | hdr->BlockMap[0].NumBlocks = Size / (UINT32)BlockSize;\r | |
1532 | \r | |
1533 | return EFI_SUCCESS;\r | |
1534 | }\r | |
1535 | \r | |
1536 | STATIC\r | |
1537 | UINT16\r | |
1538 | FvBufCalculateSum16 (\r | |
1539 | IN UINT16 *Buffer,\r | |
1540 | IN UINTN Size\r | |
1541 | )\r | |
1542 | /*++\r | |
1543 | \r | |
1544 | Routine Description:\r | |
1545 | \r | |
1546 | This function calculates the UINT16 sum for the requested region.\r | |
1547 | \r | |
1548 | Arguments:\r | |
1549 | \r | |
1550 | Buffer Pointer to buffer containing byte data of component.\r | |
1551 | Size Size of the buffer\r | |
1552 | \r | |
1553 | Returns:\r | |
1554 | \r | |
1555 | The 16 bit checksum\r | |
1556 | \r | |
1557 | --*/\r | |
1558 | {\r | |
1559 | UINTN Index;\r | |
1560 | UINT16 Sum;\r | |
1561 | \r | |
1562 | Sum = 0;\r | |
1563 | \r | |
1564 | //\r | |
1565 | // Perform the word sum for buffer\r | |
1566 | //\r | |
1567 | for (Index = 0; Index < Size; Index++) {\r | |
1568 | Sum = (UINT16) (Sum + Buffer[Index]);\r | |
1569 | }\r | |
1570 | \r | |
1571 | return (UINT16) Sum;\r | |
1572 | }\r | |
1573 | \r | |
1574 | \r | |
1575 | STATIC\r | |
1576 | UINT16\r | |
1577 | FvBufCalculateChecksum16 (\r | |
1578 | IN UINT16 *Buffer,\r | |
1579 | IN UINTN Size\r | |
1580 | )\r | |
1581 | /*++\r | |
1582 | \r | |
1583 | Routine Description::\r | |
1584 | \r | |
1585 | This function calculates the value needed for a valid UINT16 checksum\r | |
1586 | \r | |
1587 | Arguments:\r | |
1588 | \r | |
1589 | Buffer Pointer to buffer containing byte data of component.\r | |
1590 | Size Size of the buffer\r | |
1591 | \r | |
1592 | Returns:\r | |
1593 | \r | |
1594 | The 16 bit checksum value needed.\r | |
1595 | \r | |
1596 | --*/\r | |
1597 | {\r | |
1598 | return (UINT16)(0x10000 - FvBufCalculateSum16 (Buffer, Size));\r | |
1599 | }\r | |
1600 | \r | |
1601 | \r | |
1602 | STATIC\r | |
1603 | UINT8\r | |
1604 | FvBufCalculateSum8 (\r | |
1605 | IN UINT8 *Buffer,\r | |
1606 | IN UINTN Size\r | |
1607 | )\r | |
1608 | /*++\r | |
1609 | \r | |
1610 | Description:\r | |
1611 | \r | |
1612 | This function calculates the UINT8 sum for the requested region.\r | |
1613 | \r | |
1614 | Input:\r | |
1615 | \r | |
1616 | Buffer Pointer to buffer containing byte data of component.\r | |
1617 | Size Size of the buffer\r | |
1618 | \r | |
1619 | Return:\r | |
1620 | \r | |
1621 | The 8 bit checksum value needed.\r | |
1622 | \r | |
1623 | --*/\r | |
1624 | {\r | |
1625 | UINTN Index;\r | |
1626 | UINT8 Sum;\r | |
1627 | \r | |
1628 | Sum = 0;\r | |
1629 | \r | |
1630 | //\r | |
1631 | // Perform the byte sum for buffer\r | |
1632 | //\r | |
1633 | for (Index = 0; Index < Size; Index++) {\r | |
1634 | Sum = (UINT8) (Sum + Buffer[Index]);\r | |
1635 | }\r | |
1636 | \r | |
1637 | return Sum;\r | |
1638 | }\r | |
1639 | \r | |
1640 | \r | |
1641 | STATIC\r | |
1642 | UINT8\r | |
1643 | FvBufCalculateChecksum8 (\r | |
1644 | IN UINT8 *Buffer,\r | |
1645 | IN UINTN Size\r | |
1646 | )\r | |
1647 | /*++\r | |
1648 | \r | |
1649 | Description:\r | |
1650 | \r | |
1651 | This function calculates the value needed for a valid UINT8 checksum\r | |
1652 | \r | |
1653 | Input:\r | |
1654 | \r | |
1655 | Buffer Pointer to buffer containing byte data of component.\r | |
1656 | Size Size of the buffer\r | |
1657 | \r | |
1658 | Return:\r | |
1659 | \r | |
1660 | The 8 bit checksum value needed.\r | |
1661 | \r | |
1662 | --*/\r | |
1663 | {\r | |
1664 | return (UINT8)(0x100 - FvBufCalculateSum8 (Buffer, Size));\r | |
1665 | }\r | |
1666 | \r | |
1667 | \r |