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30fdf114 | 1 | /** @file\r |
97fa0ee9 | 2 | EFI Firmware Volume routines which work on a Fv image in buffers.\r |
30fdf114 | 3 | \r |
2ff3293d | 4 | Copyright (c) 1999 - 2016, Intel Corporation. All rights reserved.<BR>\r |
40d841f6 | 5 | This program and the accompanying materials\r |
30fdf114 LG |
6 | are licensed and made available under the terms and conditions of the BSD License\r |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
30fdf114 LG |
13 | **/\r |
14 | \r | |
15 | #include "FirmwareVolumeBufferLib.h"\r | |
16 | #include "BinderFuncs.h"\r | |
17 | \r | |
18 | //\r | |
19 | // Local macros\r | |
20 | //\r | |
21 | #define EFI_TEST_FFS_ATTRIBUTES_BIT(FvbAttributes, TestAttributes, Bit) \\r | |
22 | ( \\r | |
23 | (BOOLEAN) ( \\r | |
24 | (FvbAttributes & EFI_FVB2_ERASE_POLARITY) ? (((~TestAttributes) & Bit) == Bit) : ((TestAttributes & Bit) == Bit) \\r | |
25 | ) \\r | |
26 | )\r | |
27 | \r | |
97fa0ee9 YL |
28 | \r |
29 | //\r | |
30 | // Local prototypes\r | |
31 | //\r | |
32 | \r | |
e4ac870f LG |
33 | STATIC\r |
34 | UINT32\r | |
35 | FvBufGetSecHdrLen(\r | |
36 | IN EFI_COMMON_SECTION_HEADER *SectionHeader\r | |
37 | )\r | |
38 | {\r | |
39 | if (SectionHeader == NULL) {\r | |
40 | return 0;\r | |
41 | }\r | |
42 | if (FvBufExpand3ByteSize(SectionHeader->Size) == 0xffffff) {\r | |
43 | return sizeof(EFI_COMMON_SECTION_HEADER2);\r | |
44 | }\r | |
45 | return sizeof(EFI_COMMON_SECTION_HEADER);\r | |
46 | }\r | |
47 | \r | |
48 | STATIC\r | |
49 | UINT32\r | |
50 | FvBufGetSecFileLen (\r | |
51 | IN EFI_COMMON_SECTION_HEADER *SectionHeader\r | |
52 | )\r | |
53 | {\r | |
54 | UINT32 Length;\r | |
55 | if (SectionHeader == NULL) {\r | |
56 | return 0;\r | |
57 | }\r | |
58 | Length = FvBufExpand3ByteSize(SectionHeader->Size);\r | |
59 | if (Length == 0xffffff) {\r | |
60 | Length = ((EFI_COMMON_SECTION_HEADER2 *)SectionHeader)->ExtendedSize;\r | |
61 | }\r | |
62 | return Length;\r | |
63 | }\r | |
30fdf114 LG |
64 | \r |
65 | //\r | |
66 | // Local prototypes\r | |
67 | //\r | |
68 | \r | |
69 | STATIC\r | |
70 | UINT16\r | |
71 | FvBufCalculateChecksum16 (\r | |
72 | IN UINT16 *Buffer,\r | |
73 | IN UINTN Size\r | |
74 | );\r | |
75 | \r | |
76 | STATIC\r | |
77 | UINT8\r | |
78 | FvBufCalculateChecksum8 (\r | |
79 | IN UINT8 *Buffer,\r | |
80 | IN UINTN Size\r | |
81 | );\r | |
82 | \r | |
83 | //\r | |
84 | // Procedures start\r | |
85 | //\r | |
86 | \r | |
87 | EFI_STATUS\r | |
88 | FvBufRemoveFileNew (\r | |
89 | IN OUT VOID *Fv,\r | |
90 | IN EFI_GUID *Name\r | |
91 | )\r | |
92 | /*++\r | |
93 | \r | |
94 | Routine Description:\r | |
95 | \r | |
96 | Clears out all files from the Fv buffer in memory\r | |
97 | \r | |
98 | Arguments:\r | |
99 | \r | |
100 | SourceFv - Address of the Fv in memory, this firmware volume volume will\r | |
101 | be modified, if SourceFfsFile exists\r | |
102 | SourceFfsFile - Input FFS file to replace\r | |
103 | \r | |
104 | Returns:\r | |
105 | \r | |
106 | EFI_SUCCESS\r | |
107 | EFI_NOT_FOUND\r | |
108 | \r | |
109 | --*/\r | |
110 | {\r | |
111 | EFI_STATUS Status;\r | |
112 | EFI_FFS_FILE_HEADER* FileToRm;\r | |
113 | UINTN FileToRmLength;\r | |
114 | \r | |
115 | Status = FvBufFindFileByName(\r | |
116 | Fv,\r | |
117 | Name,\r | |
118 | (VOID **)&FileToRm\r | |
119 | );\r | |
120 | if (EFI_ERROR (Status)) {\r | |
121 | return Status;\r | |
122 | }\r | |
123 | \r | |
e4ac870f | 124 | FileToRmLength = FvBufGetFfsFileSize (FileToRm);\r |
30fdf114 LG |
125 | \r |
126 | CommonLibBinderSetMem (\r | |
127 | FileToRm,\r | |
128 | FileToRmLength,\r | |
129 | (((EFI_FIRMWARE_VOLUME_HEADER*)Fv)->Attributes & EFI_FVB2_ERASE_POLARITY)\r | |
130 | ? 0xFF : 0\r | |
131 | );\r | |
132 | \r | |
133 | return EFI_SUCCESS;\r | |
134 | }\r | |
135 | \r | |
136 | \r | |
137 | EFI_STATUS\r | |
138 | FvBufRemoveFile (\r | |
139 | IN OUT VOID *Fv,\r | |
140 | IN EFI_GUID *Name\r | |
141 | )\r | |
142 | /*++\r | |
143 | \r | |
144 | Routine Description:\r | |
145 | \r | |
146 | Clears out all files from the Fv buffer in memory\r | |
147 | \r | |
148 | Arguments:\r | |
149 | \r | |
150 | SourceFv - Address of the Fv in memory, this firmware volume volume will\r | |
151 | be modified, if SourceFfsFile exists\r | |
152 | SourceFfsFile - Input FFS file to replace\r | |
153 | \r | |
154 | Returns:\r | |
155 | \r | |
156 | EFI_SUCCESS\r | |
157 | EFI_NOT_FOUND\r | |
158 | \r | |
159 | --*/\r | |
160 | {\r | |
161 | EFI_STATUS Status;\r | |
162 | EFI_FFS_FILE_HEADER *NextFile;\r | |
163 | EFI_FIRMWARE_VOLUME_HEADER *TempFv;\r | |
164 | UINTN FileKey;\r | |
165 | UINTN FvLength;\r | |
166 | \r | |
167 | Status = FvBufFindFileByName(\r | |
168 | Fv,\r | |
169 | Name,\r | |
170 | NULL\r | |
171 | );\r | |
172 | if (EFI_ERROR (Status)) {\r | |
173 | return Status;\r | |
174 | }\r | |
175 | \r | |
176 | Status = FvBufGetSize (Fv, &FvLength);\r | |
177 | if (EFI_ERROR (Status)) {\r | |
178 | return Status;\r | |
179 | }\r | |
180 | \r | |
181 | TempFv = NULL;\r | |
182 | Status = FvBufDuplicate (Fv, (VOID **)&TempFv);\r | |
183 | if (EFI_ERROR (Status)) {\r | |
184 | return Status;\r | |
185 | }\r | |
186 | \r | |
187 | Status = FvBufClearAllFiles (TempFv);\r | |
188 | if (EFI_ERROR (Status)) {\r | |
aee34651 | 189 | CommonLibBinderFree (TempFv);\r |
30fdf114 LG |
190 | return Status;\r |
191 | }\r | |
192 | \r | |
193 | // TempFv has been allocated. It must now be freed\r | |
194 | // before returning.\r | |
195 | \r | |
196 | FileKey = 0;\r | |
197 | while (TRUE) {\r | |
198 | \r | |
199 | Status = FvBufFindNextFile (Fv, &FileKey, (VOID **)&NextFile);\r | |
200 | if (Status == EFI_NOT_FOUND) {\r | |
201 | break;\r | |
202 | } else if (EFI_ERROR (Status)) {\r | |
203 | CommonLibBinderFree (TempFv);\r | |
204 | return Status;\r | |
205 | }\r | |
206 | \r | |
207 | if (CommonLibBinderCompareGuid (Name, &NextFile->Name)) {\r | |
208 | continue;\r | |
209 | }\r | |
210 | else {\r | |
211 | Status = FvBufAddFile (TempFv, NextFile);\r | |
212 | if (EFI_ERROR (Status)) {\r | |
213 | CommonLibBinderFree (TempFv);\r | |
214 | return Status;\r | |
215 | }\r | |
216 | }\r | |
217 | }\r | |
218 | \r | |
219 | CommonLibBinderCopyMem (Fv, TempFv, FvLength);\r | |
220 | CommonLibBinderFree (TempFv);\r | |
221 | \r | |
222 | return EFI_SUCCESS;\r | |
223 | }\r | |
224 | \r | |
225 | \r | |
226 | EFI_STATUS\r | |
227 | FvBufChecksumFile (\r | |
228 | IN OUT VOID *FfsFile\r | |
229 | )\r | |
230 | /*++\r | |
231 | \r | |
232 | Routine Description:\r | |
233 | \r | |
234 | Clears out all files from the Fv buffer in memory\r | |
235 | \r | |
236 | Arguments:\r | |
237 | \r | |
238 | SourceFfsFile - Input FFS file to update the checksum for\r | |
239 | \r | |
240 | Returns:\r | |
241 | \r | |
242 | EFI_SUCCESS\r | |
243 | EFI_NOT_FOUND\r | |
244 | \r | |
245 | --*/\r | |
246 | {\r | |
247 | EFI_FFS_FILE_HEADER* File = (EFI_FFS_FILE_HEADER*)FfsFile;\r | |
248 | EFI_FFS_FILE_STATE StateBackup;\r | |
249 | UINT32 FileSize;\r | |
250 | \r | |
e4ac870f | 251 | FileSize = FvBufGetFfsFileSize (File);\r |
30fdf114 LG |
252 | \r |
253 | //\r | |
254 | // Fill in checksums and state, they must be 0 for checksumming.\r | |
255 | //\r | |
256 | File->IntegrityCheck.Checksum.Header = 0;\r | |
257 | File->IntegrityCheck.Checksum.File = 0;\r | |
258 | StateBackup = File->State;\r | |
259 | File->State = 0;\r | |
260 | \r | |
261 | File->IntegrityCheck.Checksum.Header =\r | |
262 | FvBufCalculateChecksum8 (\r | |
263 | (UINT8 *) File,\r | |
e4ac870f | 264 | FvBufGetFfsHeaderSize (File)\r |
30fdf114 LG |
265 | );\r |
266 | \r | |
267 | if (File->Attributes & FFS_ATTRIB_CHECKSUM) {\r | |
268 | File->IntegrityCheck.Checksum.File = FvBufCalculateChecksum8 (\r | |
e4ac870f LG |
269 | (VOID*)((UINT8 *)File + FvBufGetFfsHeaderSize (File)),\r |
270 | FileSize - FvBufGetFfsHeaderSize (File)\r | |
30fdf114 LG |
271 | );\r |
272 | } else {\r | |
273 | File->IntegrityCheck.Checksum.File = FFS_FIXED_CHECKSUM;\r | |
274 | }\r | |
275 | \r | |
276 | File->State = StateBackup;\r | |
277 | \r | |
278 | return EFI_SUCCESS;\r | |
279 | }\r | |
280 | \r | |
281 | \r | |
282 | EFI_STATUS\r | |
283 | FvBufChecksumHeader (\r | |
284 | IN OUT VOID *Fv\r | |
285 | )\r | |
286 | /*++\r | |
287 | \r | |
288 | Routine Description:\r | |
289 | \r | |
290 | Clears out all files from the Fv buffer in memory\r | |
291 | \r | |
292 | Arguments:\r | |
293 | \r | |
294 | SourceFv - Address of the Fv in memory, this firmware volume volume will\r | |
295 | be modified, if SourceFfsFile exists\r | |
296 | SourceFfsFile - Input FFS file to replace\r | |
297 | \r | |
298 | Returns:\r | |
299 | \r | |
300 | EFI_SUCCESS\r | |
301 | EFI_NOT_FOUND\r | |
302 | \r | |
303 | --*/\r | |
304 | {\r | |
305 | EFI_FIRMWARE_VOLUME_HEADER* FvHeader = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
306 | \r | |
307 | FvHeader->Checksum = 0;\r | |
308 | FvHeader->Checksum =\r | |
309 | FvBufCalculateChecksum16 (\r | |
310 | (UINT16*) FvHeader,\r | |
311 | FvHeader->HeaderLength / sizeof (UINT16)\r | |
312 | );\r | |
313 | \r | |
314 | return EFI_SUCCESS;\r | |
315 | }\r | |
316 | \r | |
317 | \r | |
318 | EFI_STATUS\r | |
319 | FvBufDuplicate (\r | |
320 | IN VOID *SourceFv,\r | |
321 | IN OUT VOID **DestinationFv\r | |
322 | )\r | |
323 | /*++\r | |
324 | \r | |
325 | Routine Description:\r | |
326 | \r | |
327 | Clears out all files from the Fv buffer in memory\r | |
328 | \r | |
329 | Arguments:\r | |
330 | \r | |
331 | SourceFv - Address of the Fv in memory\r | |
332 | DestinationFv - Output for destination Fv\r | |
333 | DestinationFv == NULL - invalid parameter\r | |
334 | *DestinationFv == NULL - memory will be allocated\r | |
335 | *DestinationFv != NULL - this address will be the destination\r | |
336 | \r | |
337 | Returns:\r | |
338 | \r | |
339 | EFI_SUCCESS\r | |
340 | \r | |
341 | --*/\r | |
342 | {\r | |
343 | EFI_STATUS Status;\r | |
344 | UINTN size;\r | |
345 | \r | |
346 | if (DestinationFv == NULL) {\r | |
347 | return EFI_INVALID_PARAMETER;\r | |
348 | }\r | |
349 | \r | |
350 | Status = FvBufGetSize (SourceFv, &size);\r | |
351 | if (EFI_ERROR (Status)) {\r | |
352 | return Status;\r | |
353 | }\r | |
354 | \r | |
355 | if (*DestinationFv == NULL) {\r | |
356 | *DestinationFv = CommonLibBinderAllocate (size);\r | |
2ff3293d HW |
357 | if (*DestinationFv == NULL) {\r |
358 | return EFI_OUT_OF_RESOURCES;\r | |
359 | }\r | |
30fdf114 LG |
360 | }\r |
361 | \r | |
362 | CommonLibBinderCopyMem (*DestinationFv, SourceFv, size);\r | |
363 | \r | |
364 | return EFI_SUCCESS;\r | |
365 | }\r | |
366 | \r | |
367 | \r | |
368 | EFI_STATUS\r | |
369 | FvBufExtend (\r | |
370 | IN VOID **Fv,\r | |
371 | IN UINTN Size\r | |
372 | )\r | |
373 | /*++\r | |
374 | \r | |
375 | Routine Description:\r | |
376 | \r | |
377 | Extends a firmware volume by the given number of bytes.\r | |
378 | \r | |
379 | BUGBUG: Does not handle the case where the firmware volume has a\r | |
380 | VTF (Volume Top File). The VTF will not be moved to the\r | |
381 | end of the extended FV.\r | |
382 | \r | |
383 | Arguments:\r | |
384 | \r | |
385 | Fv - Source and destination firmware volume.\r | |
386 | Note: The original firmware volume buffer is freed!\r | |
387 | \r | |
388 | Size - The minimum size that the firmware volume is to be extended by.\r | |
389 | The FV may be extended more than this size.\r | |
390 | \r | |
391 | Returns:\r | |
392 | \r | |
393 | EFI_SUCCESS\r | |
394 | \r | |
395 | --*/\r | |
396 | {\r | |
397 | EFI_STATUS Status;\r | |
398 | UINTN OldSize;\r | |
399 | UINTN NewSize;\r | |
400 | UINTN BlockCount;\r | |
401 | VOID* NewFv;\r | |
402 | \r | |
403 | EFI_FIRMWARE_VOLUME_HEADER* hdr;\r | |
404 | EFI_FV_BLOCK_MAP_ENTRY* blk;\r | |
405 | \r | |
406 | Status = FvBufGetSize (*Fv, &OldSize);\r | |
407 | if (EFI_ERROR (Status)) {\r | |
408 | return Status;\r | |
409 | }\r | |
410 | \r | |
411 | //\r | |
412 | // Locate the block map in the fv header\r | |
413 | //\r | |
414 | hdr = (EFI_FIRMWARE_VOLUME_HEADER*)*Fv;\r | |
415 | blk = hdr->BlockMap;\r | |
416 | \r | |
417 | //\r | |
418 | // Calculate the number of blocks needed to achieve the requested\r | |
419 | // size extension\r | |
420 | //\r | |
421 | BlockCount = ((Size + (blk->Length - 1)) / blk->Length);\r | |
422 | \r | |
423 | //\r | |
424 | // Calculate the new size from the number of blocks that will be added\r | |
425 | //\r | |
426 | NewSize = OldSize + (BlockCount * blk->Length);\r | |
427 | \r | |
428 | NewFv = CommonLibBinderAllocate (NewSize);\r | |
429 | if (NewFv == NULL) {\r | |
430 | return EFI_OUT_OF_RESOURCES;\r | |
431 | }\r | |
432 | \r | |
433 | //\r | |
434 | // Copy the old data\r | |
435 | //\r | |
436 | CommonLibBinderCopyMem (NewFv, *Fv, OldSize);\r | |
437 | \r | |
438 | //\r | |
439 | // Free the old fv buffer\r | |
440 | //\r | |
441 | CommonLibBinderFree (*Fv);\r | |
442 | \r | |
443 | //\r | |
444 | // Locate the block map in the new fv header\r | |
445 | //\r | |
446 | hdr = (EFI_FIRMWARE_VOLUME_HEADER*)NewFv;\r | |
447 | hdr->FvLength = NewSize;\r | |
448 | blk = hdr->BlockMap;\r | |
449 | \r | |
450 | //\r | |
451 | // Update the block map for the new fv\r | |
452 | //\r | |
453 | blk->NumBlocks += (UINT32)BlockCount;\r | |
454 | \r | |
455 | //\r | |
456 | // Update the FV header checksum\r | |
457 | //\r | |
458 | FvBufChecksumHeader (NewFv);\r | |
459 | \r | |
460 | //\r | |
461 | // Clear out the new area of the FV\r | |
462 | //\r | |
463 | CommonLibBinderSetMem (\r | |
464 | (UINT8*)NewFv + OldSize,\r | |
465 | (NewSize - OldSize),\r | |
466 | (hdr->Attributes & EFI_FVB2_ERASE_POLARITY) ? 0xFF : 0\r | |
467 | );\r | |
468 | \r | |
469 | //\r | |
470 | // Set output with new fv that was created\r | |
471 | //\r | |
472 | *Fv = NewFv;\r | |
473 | \r | |
474 | return EFI_SUCCESS;\r | |
475 | \r | |
476 | }\r | |
477 | \r | |
478 | \r | |
479 | EFI_STATUS\r | |
480 | FvBufClearAllFiles (\r | |
481 | IN OUT VOID *Fv\r | |
482 | )\r | |
483 | /*++\r | |
484 | \r | |
485 | Routine Description:\r | |
486 | \r | |
487 | Clears out all files from the Fv buffer in memory\r | |
488 | \r | |
489 | Arguments:\r | |
490 | \r | |
491 | Fv - Address of the Fv in memory\r | |
492 | \r | |
493 | Returns:\r | |
494 | \r | |
495 | EFI_SUCCESS\r | |
496 | \r | |
497 | --*/\r | |
498 | \r | |
499 | {\r | |
500 | EFI_FIRMWARE_VOLUME_HEADER *hdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
501 | EFI_STATUS Status;\r | |
502 | UINTN size = 0;\r | |
503 | \r | |
504 | Status = FvBufGetSize (Fv, &size);\r | |
505 | if (EFI_ERROR (Status)) {\r | |
506 | return Status;\r | |
507 | }\r | |
508 | \r | |
509 | CommonLibBinderSetMem(\r | |
510 | (UINT8*)hdr + hdr->HeaderLength,\r | |
511 | size - hdr->HeaderLength,\r | |
512 | (hdr->Attributes & EFI_FVB2_ERASE_POLARITY) ? 0xFF : 0\r | |
513 | );\r | |
514 | \r | |
515 | return EFI_SUCCESS;\r | |
516 | }\r | |
517 | \r | |
518 | \r | |
519 | EFI_STATUS\r | |
520 | FvBufGetSize (\r | |
521 | IN VOID *Fv,\r | |
522 | OUT UINTN *Size\r | |
523 | )\r | |
524 | /*++\r | |
525 | \r | |
526 | Routine Description:\r | |
527 | \r | |
528 | Clears out all files from the Fv buffer in memory\r | |
529 | \r | |
530 | Arguments:\r | |
531 | \r | |
532 | Fv - Address of the Fv in memory\r | |
533 | \r | |
534 | Returns:\r | |
535 | \r | |
536 | EFI_SUCCESS\r | |
537 | \r | |
538 | --*/\r | |
539 | \r | |
540 | {\r | |
541 | EFI_FIRMWARE_VOLUME_HEADER *hdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
542 | EFI_FV_BLOCK_MAP_ENTRY *blk = hdr->BlockMap;\r | |
543 | \r | |
544 | *Size = 0;\r | |
545 | \r | |
546 | while (blk->Length != 0 || blk->NumBlocks != 0) {\r | |
547 | *Size = *Size + (blk->Length * blk->NumBlocks);\r | |
548 | if (*Size >= 0x40000000) {\r | |
549 | // If size is greater than 1GB, then assume it is corrupted\r | |
550 | return EFI_VOLUME_CORRUPTED;\r | |
551 | }\r | |
552 | blk++;\r | |
553 | }\r | |
554 | \r | |
555 | if (*Size == 0) {\r | |
556 | // If size is 0, then assume the volume is corrupted\r | |
557 | return EFI_VOLUME_CORRUPTED;\r | |
558 | }\r | |
559 | \r | |
560 | return EFI_SUCCESS;\r | |
561 | }\r | |
562 | \r | |
563 | \r | |
564 | EFI_STATUS\r | |
565 | FvBufAddFile (\r | |
566 | IN OUT VOID *Fv,\r | |
567 | IN VOID *File\r | |
568 | )\r | |
569 | /*++\r | |
570 | \r | |
571 | Routine Description:\r | |
572 | \r | |
573 | Adds a new FFS file\r | |
574 | \r | |
575 | Arguments:\r | |
576 | \r | |
577 | Fv - Address of the Fv in memory\r | |
578 | File - FFS file to add to Fv\r | |
579 | \r | |
580 | Returns:\r | |
581 | \r | |
582 | EFI_SUCCESS\r | |
583 | \r | |
584 | --*/\r | |
585 | {\r | |
586 | EFI_FIRMWARE_VOLUME_HEADER *hdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
587 | \r | |
588 | EFI_FFS_FILE_HEADER *fhdr = NULL;\r | |
2bcc713e | 589 | EFI_FVB_ATTRIBUTES_2 FvbAttributes;\r |
30fdf114 LG |
590 | UINTN offset;\r |
591 | UINTN fsize;\r | |
592 | UINTN newSize;\r | |
593 | UINTN clearLoop;\r | |
594 | \r | |
595 | EFI_STATUS Status;\r | |
596 | UINTN fvSize;\r | |
597 | \r | |
598 | Status = FvBufGetSize (Fv, &fvSize);\r | |
599 | if (EFI_ERROR (Status)) {\r | |
600 | return Status;\r | |
601 | }\r | |
602 | \r | |
603 | FvbAttributes = hdr->Attributes;\r | |
e4ac870f | 604 | newSize = FvBufGetFfsFileSize ((EFI_FFS_FILE_HEADER*)File);\r |
30fdf114 LG |
605 | \r |
606 | for(\r | |
607 | offset = (UINTN)ALIGN_POINTER (hdr->HeaderLength, 8);\r | |
608 | offset + newSize <= fvSize;\r | |
609 | offset = (UINTN)ALIGN_POINTER (offset, 8)\r | |
610 | ) {\r | |
611 | \r | |
612 | fhdr = (EFI_FFS_FILE_HEADER*) ((UINT8*)hdr + offset);\r | |
613 | \r | |
614 | if (EFI_TEST_FFS_ATTRIBUTES_BIT(\r | |
615 | FvbAttributes,\r | |
616 | fhdr->State,\r | |
617 | EFI_FILE_HEADER_VALID\r | |
618 | )\r | |
619 | ) {\r | |
620 | // BUGBUG: Need to make sure that the new file does not already\r | |
621 | // exist.\r | |
622 | \r | |
e4ac870f | 623 | fsize = FvBufGetFfsFileSize (fhdr);\r |
30fdf114 LG |
624 | if (fsize == 0 || (offset + fsize > fvSize)) {\r |
625 | return EFI_VOLUME_CORRUPTED;\r | |
626 | }\r | |
627 | \r | |
628 | offset = offset + fsize;\r | |
629 | continue;\r | |
630 | }\r | |
631 | \r | |
632 | clearLoop = 0;\r | |
633 | while ((clearLoop < newSize) &&\r | |
634 | (((UINT8*)fhdr)[clearLoop] ==\r | |
635 | (UINT8)((hdr->Attributes & EFI_FVB2_ERASE_POLARITY) ? 0xFF : 0)\r | |
636 | )\r | |
637 | ) {\r | |
638 | clearLoop++;\r | |
639 | }\r | |
640 | \r | |
641 | //\r | |
642 | // We found a place in the FV which is empty and big enough for\r | |
643 | // the new file\r | |
644 | //\r | |
645 | if (clearLoop >= newSize) {\r | |
646 | break;\r | |
647 | }\r | |
648 | \r | |
649 | offset = offset + 1; // Make some forward progress\r | |
650 | }\r | |
651 | \r | |
652 | if (offset + newSize > fvSize) {\r | |
653 | return EFI_OUT_OF_RESOURCES;\r | |
654 | }\r | |
655 | \r | |
656 | CommonLibBinderCopyMem (fhdr, File, newSize);\r | |
657 | \r | |
658 | return EFI_SUCCESS;\r | |
659 | }\r | |
660 | \r | |
661 | \r | |
662 | EFI_STATUS\r | |
663 | FvBufAddFileWithExtend (\r | |
664 | IN OUT VOID **Fv,\r | |
665 | IN VOID *File\r | |
666 | )\r | |
667 | /*++\r | |
668 | \r | |
669 | Routine Description:\r | |
670 | \r | |
671 | Adds a new FFS file. Extends the firmware volume if needed.\r | |
672 | \r | |
673 | Arguments:\r | |
674 | \r | |
675 | Fv - Source and destination firmware volume.\r | |
676 | Note: If the FV is extended, then the original firmware volume\r | |
677 | buffer is freed!\r | |
678 | \r | |
679 | Size - The minimum size that the firmware volume is to be extended by.\r | |
680 | The FV may be extended more than this size.\r | |
681 | \r | |
682 | Returns:\r | |
683 | \r | |
684 | EFI_SUCCESS\r | |
685 | \r | |
686 | --*/\r | |
687 | {\r | |
688 | EFI_STATUS Status;\r | |
689 | EFI_FFS_FILE_HEADER* NewFile;\r | |
690 | \r | |
691 | NewFile = (EFI_FFS_FILE_HEADER*)File;\r | |
692 | \r | |
693 | //\r | |
694 | // Try to add to the capsule volume\r | |
695 | //\r | |
696 | Status = FvBufAddFile (*Fv, NewFile);\r | |
697 | if (Status == EFI_OUT_OF_RESOURCES) {\r | |
698 | //\r | |
699 | // Try to extend the capsule volume by the size of the file\r | |
700 | //\r | |
701 | Status = FvBufExtend (Fv, FvBufExpand3ByteSize (NewFile->Size));\r | |
702 | if (EFI_ERROR (Status)) {\r | |
703 | return Status;\r | |
704 | }\r | |
705 | \r | |
706 | //\r | |
707 | // Now, try to add the file again\r | |
708 | //\r | |
709 | Status = FvBufAddFile (*Fv, NewFile);\r | |
710 | }\r | |
711 | \r | |
712 | return Status;\r | |
713 | }\r | |
714 | \r | |
715 | \r | |
716 | EFI_STATUS\r | |
717 | FvBufAddVtfFile (\r | |
718 | IN OUT VOID *Fv,\r | |
719 | IN VOID *File\r | |
720 | )\r | |
721 | /*++\r | |
722 | \r | |
723 | Routine Description:\r | |
724 | \r | |
725 | Adds a new FFS VFT (Volume Top File) file. In other words, adds the\r | |
726 | file to the end of the firmware volume.\r | |
727 | \r | |
728 | Arguments:\r | |
729 | \r | |
730 | Fv - Address of the Fv in memory\r | |
731 | File - FFS file to add to Fv\r | |
732 | \r | |
733 | Returns:\r | |
734 | \r | |
735 | EFI_SUCCESS\r | |
736 | \r | |
737 | --*/\r | |
738 | {\r | |
739 | EFI_STATUS Status;\r | |
740 | \r | |
741 | EFI_FIRMWARE_VOLUME_HEADER *hdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
742 | \r | |
743 | EFI_FFS_FILE_HEADER* NewFile;\r | |
744 | UINTN NewFileSize;\r | |
745 | \r | |
746 | UINT8 erasedUint8;\r | |
747 | UINTN clearLoop;\r | |
748 | \r | |
749 | EFI_FFS_FILE_HEADER *LastFile;\r | |
750 | UINTN LastFileSize;\r | |
751 | \r | |
752 | UINTN fvSize;\r | |
753 | UINTN Key;\r | |
754 | \r | |
755 | Status = FvBufGetSize (Fv, &fvSize);\r | |
756 | if (EFI_ERROR (Status)) {\r | |
757 | return Status;\r | |
758 | }\r | |
759 | \r | |
760 | erasedUint8 = (UINT8)((hdr->Attributes & EFI_FVB2_ERASE_POLARITY) ? 0xFF : 0);\r | |
e4ac870f | 761 | NewFileSize = FvBufGetFfsFileSize ((EFI_FFS_FILE_HEADER*)File);\r |
30fdf114 LG |
762 | \r |
763 | if (NewFileSize != (UINTN)ALIGN_POINTER (NewFileSize, 8)) {\r | |
764 | return EFI_INVALID_PARAMETER;\r | |
765 | }\r | |
766 | \r | |
767 | //\r | |
768 | // Find the last file in the FV\r | |
769 | //\r | |
770 | Key = 0;\r | |
771 | LastFile = NULL;\r | |
772 | LastFileSize = 0;\r | |
773 | do {\r | |
774 | Status = FvBufFindNextFile (Fv, &Key, (VOID **)&LastFile);\r | |
e4ac870f | 775 | LastFileSize = FvBufGetFfsFileSize ((EFI_FFS_FILE_HEADER*)File);\r |
30fdf114 LG |
776 | } while (!EFI_ERROR (Status));\r |
777 | \r | |
778 | //\r | |
779 | // If no files were found, then we start at the beginning of the FV\r | |
780 | //\r | |
781 | if (LastFile == NULL) {\r | |
782 | LastFile = (EFI_FFS_FILE_HEADER*)((UINT8*)hdr + hdr->HeaderLength);\r | |
783 | }\r | |
784 | \r | |
785 | //\r | |
786 | // We want to put the new file (VTF) at the end of the FV\r | |
787 | //\r | |
788 | NewFile = (EFI_FFS_FILE_HEADER*)((UINT8*)hdr + (fvSize - NewFileSize));\r | |
789 | \r | |
790 | //\r | |
791 | // Check to see if there is enough room for the VTF after the last file\r | |
792 | // found in the FV\r | |
793 | //\r | |
794 | if ((UINT8*)NewFile < ((UINT8*)LastFile + LastFileSize)) {\r | |
795 | return EFI_OUT_OF_RESOURCES;\r | |
796 | }\r | |
797 | \r | |
798 | //\r | |
799 | // Loop to determine if the end of the FV is empty\r | |
800 | //\r | |
801 | clearLoop = 0;\r | |
802 | while ((clearLoop < NewFileSize) &&\r | |
803 | (((UINT8*)NewFile)[clearLoop] == erasedUint8)\r | |
804 | ) {\r | |
805 | clearLoop++;\r | |
806 | }\r | |
807 | \r | |
808 | //\r | |
809 | // Check to see if there was not enough room for the file\r | |
810 | //\r | |
811 | if (clearLoop < NewFileSize) {\r | |
812 | return EFI_OUT_OF_RESOURCES;\r | |
813 | }\r | |
814 | \r | |
815 | CommonLibBinderCopyMem (NewFile, File, NewFileSize);\r | |
816 | \r | |
817 | return EFI_SUCCESS;\r | |
818 | }\r | |
819 | \r | |
820 | \r | |
821 | VOID\r | |
822 | FvBufCompact3ByteSize (\r | |
823 | OUT VOID* SizeDest,\r | |
824 | IN UINT32 Size\r | |
825 | )\r | |
826 | /*++\r | |
827 | \r | |
828 | Routine Description:\r | |
829 | \r | |
830 | Expands the 3 byte size commonly used in Firmware Volume data structures\r | |
831 | \r | |
832 | Arguments:\r | |
833 | \r | |
834 | Size - Address of the 3 byte array representing the size\r | |
835 | \r | |
836 | Returns:\r | |
837 | \r | |
838 | UINT32\r | |
839 | \r | |
840 | --*/\r | |
841 | {\r | |
842 | ((UINT8*)SizeDest)[0] = (UINT8)Size;\r | |
843 | ((UINT8*)SizeDest)[1] = (UINT8)(Size >> 8);\r | |
844 | ((UINT8*)SizeDest)[2] = (UINT8)(Size >> 16);\r | |
845 | }\r | |
846 | \r | |
e4ac870f LG |
847 | UINT32\r |
848 | FvBufGetFfsFileSize (\r | |
849 | IN EFI_FFS_FILE_HEADER *Ffs\r | |
850 | )\r | |
851 | /*++\r | |
852 | \r | |
853 | Routine Description:\r | |
854 | \r | |
855 | Get the FFS file size.\r | |
856 | \r | |
857 | Arguments:\r | |
858 | \r | |
859 | Ffs - Pointer to FFS header\r | |
860 | \r | |
861 | Returns:\r | |
862 | \r | |
863 | UINT32\r | |
864 | \r | |
865 | --*/\r | |
866 | {\r | |
867 | if (Ffs == NULL) {\r | |
868 | return 0;\r | |
869 | }\r | |
870 | if (Ffs->Attributes & FFS_ATTRIB_LARGE_FILE) {\r | |
6eff5d22 | 871 | return (UINT32) ((EFI_FFS_FILE_HEADER2 *)Ffs)->ExtendedSize;\r |
e4ac870f LG |
872 | }\r |
873 | return FvBufExpand3ByteSize(Ffs->Size);\r | |
874 | }\r | |
875 | \r | |
876 | UINT32\r | |
877 | FvBufGetFfsHeaderSize (\r | |
878 | IN EFI_FFS_FILE_HEADER *Ffs\r | |
879 | )\r | |
880 | /*++\r | |
881 | \r | |
882 | Routine Description:\r | |
883 | \r | |
884 | Get the FFS header size.\r | |
885 | \r | |
886 | Arguments:\r | |
887 | \r | |
888 | Ffs - Pointer to FFS header\r | |
889 | \r | |
890 | Returns:\r | |
891 | \r | |
892 | UINT32\r | |
893 | \r | |
894 | --*/\r | |
895 | {\r | |
896 | if (Ffs == NULL) {\r | |
897 | return 0;\r | |
898 | }\r | |
899 | if (Ffs->Attributes & FFS_ATTRIB_LARGE_FILE) {\r | |
900 | return sizeof(EFI_FFS_FILE_HEADER2);\r | |
901 | }\r | |
902 | return sizeof(EFI_FFS_FILE_HEADER);\r | |
903 | }\r | |
904 | \r | |
30fdf114 LG |
905 | UINT32\r |
906 | FvBufExpand3ByteSize (\r | |
907 | IN VOID* Size\r | |
908 | )\r | |
909 | /*++\r | |
910 | \r | |
911 | Routine Description:\r | |
912 | \r | |
913 | Expands the 3 byte size commonly used in Firmware Volume data structures\r | |
914 | \r | |
915 | Arguments:\r | |
916 | \r | |
917 | Size - Address of the 3 byte array representing the size\r | |
918 | \r | |
919 | Returns:\r | |
920 | \r | |
921 | UINT32\r | |
922 | \r | |
923 | --*/\r | |
924 | {\r | |
925 | return (((UINT8*)Size)[2] << 16) +\r | |
926 | (((UINT8*)Size)[1] << 8) +\r | |
927 | ((UINT8*)Size)[0];\r | |
928 | }\r | |
929 | \r | |
930 | EFI_STATUS\r | |
931 | FvBufFindNextFile (\r | |
932 | IN VOID *Fv,\r | |
933 | IN OUT UINTN *Key,\r | |
934 | OUT VOID **File\r | |
935 | )\r | |
936 | /*++\r | |
937 | \r | |
938 | Routine Description:\r | |
939 | \r | |
940 | Iterates through the files contained within the firmware volume\r | |
941 | \r | |
942 | Arguments:\r | |
943 | \r | |
944 | Fv - Address of the Fv in memory\r | |
945 | Key - Should be 0 to get the first file. After that, it should be\r | |
946 | passed back in without modifying it's contents to retrieve\r | |
947 | subsequent files.\r | |
948 | File - Output file pointer\r | |
949 | File == NULL - invalid parameter\r | |
950 | otherwise - *File will be update to the location of the file\r | |
951 | \r | |
952 | Returns:\r | |
953 | \r | |
954 | EFI_SUCCESS\r | |
955 | EFI_NOT_FOUND\r | |
956 | EFI_VOLUME_CORRUPTED\r | |
957 | \r | |
958 | --*/\r | |
959 | {\r | |
960 | EFI_FIRMWARE_VOLUME_HEADER *hdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
961 | \r | |
962 | EFI_FFS_FILE_HEADER *fhdr = NULL;\r | |
2bcc713e | 963 | EFI_FVB_ATTRIBUTES_2 FvbAttributes;\r |
30fdf114 LG |
964 | UINTN fsize;\r |
965 | \r | |
966 | EFI_STATUS Status;\r | |
967 | UINTN fvSize;\r | |
968 | \r | |
969 | if (Fv == NULL) {\r | |
970 | return EFI_INVALID_PARAMETER;\r | |
971 | }\r | |
972 | \r | |
973 | Status = FvBufGetSize (Fv, &fvSize);\r | |
974 | if (EFI_ERROR (Status)) {\r | |
975 | return Status;\r | |
976 | }\r | |
977 | \r | |
978 | if (*Key == 0) {\r | |
979 | *Key = hdr->HeaderLength;\r | |
980 | }\r | |
981 | \r | |
982 | FvbAttributes = hdr->Attributes;\r | |
983 | \r | |
984 | for(\r | |
985 | *Key = (UINTN)ALIGN_POINTER (*Key, 8);\r | |
986 | (*Key + sizeof (*fhdr)) < fvSize;\r | |
987 | *Key = (UINTN)ALIGN_POINTER (*Key, 8)\r | |
988 | ) {\r | |
989 | \r | |
990 | fhdr = (EFI_FFS_FILE_HEADER*) ((UINT8*)hdr + *Key);\r | |
e4ac870f | 991 | fsize = FvBufGetFfsFileSize (fhdr);\r |
30fdf114 LG |
992 | \r |
993 | if (!EFI_TEST_FFS_ATTRIBUTES_BIT(\r | |
994 | FvbAttributes,\r | |
995 | fhdr->State,\r | |
996 | EFI_FILE_HEADER_VALID\r | |
997 | ) ||\r | |
998 | EFI_TEST_FFS_ATTRIBUTES_BIT(\r | |
999 | FvbAttributes,\r | |
1000 | fhdr->State,\r | |
1001 | EFI_FILE_HEADER_INVALID\r | |
1002 | )\r | |
1003 | ) {\r | |
1004 | *Key = *Key + 1; // Make some forward progress\r | |
1005 | continue;\r | |
1006 | } else if(\r | |
1007 | EFI_TEST_FFS_ATTRIBUTES_BIT(\r | |
1008 | FvbAttributes,\r | |
1009 | fhdr->State,\r | |
1010 | EFI_FILE_MARKED_FOR_UPDATE\r | |
1011 | ) ||\r | |
1012 | EFI_TEST_FFS_ATTRIBUTES_BIT(\r | |
1013 | FvbAttributes,\r | |
1014 | fhdr->State,\r | |
1015 | EFI_FILE_DELETED\r | |
1016 | )\r | |
1017 | ) {\r | |
1018 | *Key = *Key + fsize;\r | |
1019 | continue;\r | |
1020 | } else if (EFI_TEST_FFS_ATTRIBUTES_BIT(\r | |
1021 | FvbAttributes,\r | |
1022 | fhdr->State,\r | |
1023 | EFI_FILE_DATA_VALID\r | |
1024 | )\r | |
1025 | ) {\r | |
1026 | *File = (UINT8*)hdr + *Key;\r | |
1027 | *Key = *Key + fsize;\r | |
1028 | return EFI_SUCCESS;\r | |
1029 | }\r | |
1030 | \r | |
1031 | *Key = *Key + 1; // Make some forward progress\r | |
1032 | }\r | |
1033 | \r | |
1034 | return EFI_NOT_FOUND;\r | |
1035 | }\r | |
1036 | \r | |
1037 | \r | |
1038 | EFI_STATUS\r | |
1039 | FvBufFindFileByName (\r | |
1040 | IN VOID *Fv,\r | |
1041 | IN EFI_GUID *Name,\r | |
1042 | OUT VOID **File\r | |
1043 | )\r | |
1044 | /*++\r | |
1045 | \r | |
1046 | Routine Description:\r | |
1047 | \r | |
1048 | Searches the Fv for a file by its name\r | |
1049 | \r | |
1050 | Arguments:\r | |
1051 | \r | |
1052 | Fv - Address of the Fv in memory\r | |
1053 | Name - Guid filename to search for in the firmware volume\r | |
1054 | File - Output file pointer\r | |
1055 | File == NULL - Only determine if the file exists, based on return\r | |
1056 | value from the function call.\r | |
1057 | otherwise - *File will be update to the location of the file\r | |
1058 | \r | |
1059 | Returns:\r | |
1060 | \r | |
1061 | EFI_SUCCESS\r | |
1062 | EFI_NOT_FOUND\r | |
1063 | EFI_VOLUME_CORRUPTED\r | |
1064 | \r | |
1065 | --*/\r | |
1066 | {\r | |
1067 | EFI_STATUS Status;\r | |
1068 | UINTN Key;\r | |
1069 | EFI_FFS_FILE_HEADER *NextFile;\r | |
1070 | \r | |
1071 | Key = 0;\r | |
1072 | while (TRUE) {\r | |
1073 | Status = FvBufFindNextFile (Fv, &Key, (VOID **)&NextFile);\r | |
1074 | if (EFI_ERROR (Status)) {\r | |
1075 | return Status;\r | |
1076 | }\r | |
1077 | \r | |
1078 | if (CommonLibBinderCompareGuid (Name, &NextFile->Name)) {\r | |
1079 | if (File != NULL) {\r | |
1080 | *File = NextFile;\r | |
1081 | }\r | |
1082 | return EFI_SUCCESS;\r | |
1083 | }\r | |
1084 | }\r | |
1085 | \r | |
1086 | return EFI_NOT_FOUND;\r | |
1087 | }\r | |
1088 | \r | |
1089 | \r | |
1090 | EFI_STATUS\r | |
1091 | FvBufFindFileByType (\r | |
1092 | IN VOID *Fv,\r | |
1093 | IN EFI_FV_FILETYPE Type,\r | |
1094 | OUT VOID **File\r | |
1095 | )\r | |
1096 | /*++\r | |
1097 | \r | |
1098 | Routine Description:\r | |
1099 | \r | |
1100 | Searches the Fv for a file by its type\r | |
1101 | \r | |
1102 | Arguments:\r | |
1103 | \r | |
1104 | Fv - Address of the Fv in memory\r | |
1105 | Type - FFS FILE type to search for\r | |
1106 | File - Output file pointer\r | |
1107 | (File == NULL) -> Only determine if the file exists, based on return\r | |
1108 | value from the function call.\r | |
1109 | otherwise -> *File will be update to the location of the file\r | |
1110 | \r | |
1111 | Returns:\r | |
1112 | \r | |
1113 | EFI_SUCCESS\r | |
1114 | EFI_NOT_FOUND\r | |
1115 | EFI_VOLUME_CORRUPTED\r | |
1116 | \r | |
1117 | --*/\r | |
1118 | {\r | |
1119 | EFI_STATUS Status;\r | |
1120 | UINTN Key;\r | |
1121 | EFI_FFS_FILE_HEADER *NextFile;\r | |
1122 | \r | |
1123 | Key = 0;\r | |
1124 | while (TRUE) {\r | |
1125 | Status = FvBufFindNextFile (Fv, &Key, (VOID **)&NextFile);\r | |
1126 | if (EFI_ERROR (Status)) {\r | |
1127 | return Status;\r | |
1128 | }\r | |
1129 | \r | |
1130 | if (Type == NextFile->Type) {\r | |
1131 | if (File != NULL) {\r | |
1132 | *File = NextFile;\r | |
1133 | }\r | |
1134 | return EFI_SUCCESS;\r | |
1135 | }\r | |
1136 | }\r | |
1137 | \r | |
1138 | return EFI_NOT_FOUND;\r | |
1139 | }\r | |
1140 | \r | |
1141 | \r | |
1142 | EFI_STATUS\r | |
1143 | FvBufGetFileRawData (\r | |
1144 | IN VOID* FfsFile,\r | |
1145 | OUT VOID** RawData,\r | |
1146 | OUT UINTN* RawDataSize\r | |
1147 | )\r | |
1148 | /*++\r | |
1149 | \r | |
1150 | Routine Description:\r | |
1151 | \r | |
1152 | Searches the requested file for raw data.\r | |
1153 | \r | |
1154 | This routine either returns all the payload of a EFI_FV_FILETYPE_RAW file,\r | |
1155 | or finds the EFI_SECTION_RAW section within the file and returns its data.\r | |
1156 | \r | |
1157 | Arguments:\r | |
1158 | \r | |
1159 | FfsFile - Address of the FFS file in memory\r | |
1160 | RawData - Pointer to the raw data within the file\r | |
1161 | (This is NOT allocated. It is within the file.)\r | |
1162 | RawDataSize - Size of the raw data within the file\r | |
1163 | \r | |
1164 | Returns:\r | |
1165 | \r | |
1166 | EFI_STATUS\r | |
1167 | \r | |
1168 | --*/\r | |
1169 | {\r | |
1170 | EFI_STATUS Status;\r | |
1171 | EFI_FFS_FILE_HEADER* File;\r | |
1172 | EFI_RAW_SECTION* Section;\r | |
1173 | \r | |
1174 | File = (EFI_FFS_FILE_HEADER*)FfsFile;\r | |
1175 | \r | |
1176 | //\r | |
1177 | // Is the file type == EFI_FV_FILETYPE_RAW?\r | |
1178 | //\r | |
1179 | if (File->Type == EFI_FV_FILETYPE_RAW) {\r | |
1180 | //\r | |
1181 | // Raw filetypes don't have sections, so we just return the raw data\r | |
1182 | //\r | |
e4ac870f LG |
1183 | *RawData = (VOID*)((UINT8 *)File + FvBufGetFfsHeaderSize (File));\r |
1184 | *RawDataSize = FvBufGetFfsFileSize (File) - FvBufGetFfsHeaderSize (File);\r | |
30fdf114 LG |
1185 | return EFI_SUCCESS;\r |
1186 | }\r | |
1187 | \r | |
1188 | //\r | |
1189 | // Within the file, we now need to find the EFI_SECTION_RAW section.\r | |
1190 | //\r | |
1191 | Status = FvBufFindSectionByType (File, EFI_SECTION_RAW, (VOID **)&Section);\r | |
1192 | if (EFI_ERROR (Status)) {\r | |
1193 | return Status;\r | |
1194 | }\r | |
1195 | \r | |
e4ac870f | 1196 | *RawData = (VOID*)((UINT8 *)Section + FvBufGetSecHdrLen(Section));\r |
30fdf114 | 1197 | *RawDataSize =\r |
e4ac870f | 1198 | FvBufGetSecFileLen (Section) - FvBufGetSecHdrLen(Section);\r |
30fdf114 LG |
1199 | \r |
1200 | return EFI_SUCCESS;\r | |
1201 | \r | |
1202 | }\r | |
1203 | \r | |
1204 | \r | |
1205 | EFI_STATUS\r | |
1206 | FvBufPackageFreeformRawFile (\r | |
1207 | IN EFI_GUID* Filename,\r | |
1208 | IN VOID* RawData,\r | |
1209 | IN UINTN RawDataSize,\r | |
1210 | OUT VOID** FfsFile\r | |
1211 | )\r | |
1212 | /*++\r | |
1213 | \r | |
1214 | Routine Description:\r | |
1215 | \r | |
1216 | Packages up a FFS file containing the input raw data.\r | |
1217 | \r | |
1218 | The file created will have a type of EFI_FV_FILETYPE_FREEFORM, and will\r | |
1219 | contain one EFI_FV_FILETYPE_RAW section.\r | |
1220 | \r | |
1221 | Arguments:\r | |
1222 | \r | |
1223 | RawData - Pointer to the raw data to be packed\r | |
1224 | RawDataSize - Size of the raw data to be packed\r | |
1225 | FfsFile - Address of the packaged FFS file.\r | |
1226 | Note: The called must deallocate this memory!\r | |
1227 | \r | |
1228 | Returns:\r | |
1229 | \r | |
1230 | EFI_STATUS\r | |
1231 | \r | |
1232 | --*/\r | |
1233 | {\r | |
1234 | EFI_FFS_FILE_HEADER* NewFile;\r | |
1235 | UINT32 NewFileSize;\r | |
1236 | EFI_RAW_SECTION* NewSection;\r | |
1237 | UINT32 NewSectionSize;\r | |
e4ac870f LG |
1238 | UINT32 FfsHdrLen;\r |
1239 | UINT32 SecHdrLen;\r | |
30fdf114 LG |
1240 | \r |
1241 | //\r | |
1242 | // The section size is the DataSize + the size of the section header\r | |
1243 | //\r | |
1244 | NewSectionSize = (UINT32)sizeof (EFI_RAW_SECTION) + (UINT32)RawDataSize;\r | |
e4ac870f LG |
1245 | SecHdrLen = sizeof (EFI_RAW_SECTION);\r |
1246 | if (NewSectionSize >= MAX_SECTION_SIZE) {\r | |
1247 | NewSectionSize = (UINT32)sizeof (EFI_RAW_SECTION2) + (UINT32)RawDataSize;\r | |
1248 | SecHdrLen = sizeof (EFI_RAW_SECTION2);\r | |
1249 | }\r | |
30fdf114 LG |
1250 | \r |
1251 | //\r | |
1252 | // The file size is the size of the file header + the section size\r | |
1253 | //\r | |
1254 | NewFileSize = sizeof (EFI_FFS_FILE_HEADER) + NewSectionSize;\r | |
e4ac870f LG |
1255 | FfsHdrLen = sizeof (EFI_FFS_FILE_HEADER);\r |
1256 | if (NewFileSize >= MAX_FFS_SIZE) {\r | |
1257 | NewFileSize = sizeof (EFI_FFS_FILE_HEADER2) + NewSectionSize;\r | |
1258 | FfsHdrLen = sizeof (EFI_FFS_FILE_HEADER2);\r | |
1259 | }\r | |
30fdf114 LG |
1260 | \r |
1261 | //\r | |
1262 | // Try to allocate a buffer to build the new FFS file in\r | |
1263 | //\r | |
1264 | NewFile = CommonLibBinderAllocate (NewFileSize);\r | |
1265 | if (NewFile == NULL) {\r | |
1266 | return EFI_OUT_OF_RESOURCES;\r | |
1267 | }\r | |
1268 | CommonLibBinderSetMem (NewFile, NewFileSize, 0);\r | |
1269 | \r | |
1270 | //\r | |
1271 | // The NewSection follow right after the FFS file header\r | |
1272 | //\r | |
e4ac870f LG |
1273 | NewSection = (EFI_RAW_SECTION*)((UINT8*)NewFile + FfsHdrLen);\r |
1274 | if (NewSectionSize >= MAX_SECTION_SIZE) {\r | |
1275 | FvBufCompact3ByteSize (NewSection->Size, 0xffffff);\r | |
1276 | ((EFI_RAW_SECTION2 *)NewSection)->ExtendedSize = NewSectionSize;\r | |
1277 | } else {\r | |
1278 | FvBufCompact3ByteSize (NewSection->Size, NewSectionSize);\r | |
1279 | }\r | |
30fdf114 LG |
1280 | NewSection->Type = EFI_SECTION_RAW;\r |
1281 | \r | |
1282 | //\r | |
1283 | // Copy the actual file data into the buffer\r | |
1284 | //\r | |
e4ac870f | 1285 | CommonLibBinderCopyMem ((UINT8 *)NewSection + SecHdrLen, RawData, RawDataSize);\r |
30fdf114 LG |
1286 | \r |
1287 | //\r | |
1288 | // Initialize the FFS file header\r | |
1289 | //\r | |
1290 | CommonLibBinderCopyMem (&NewFile->Name, Filename, sizeof (EFI_GUID));\r | |
30fdf114 | 1291 | NewFile->Attributes = 0;\r |
e4ac870f LG |
1292 | if (NewFileSize >= MAX_FFS_SIZE) {\r |
1293 | FvBufCompact3ByteSize (NewFile->Size, 0x0);\r | |
1294 | ((EFI_FFS_FILE_HEADER2 *)NewFile)->ExtendedSize = NewFileSize;\r | |
1295 | NewFile->Attributes |= FFS_ATTRIB_LARGE_FILE;\r | |
1296 | } else {\r | |
1297 | FvBufCompact3ByteSize (NewFile->Size, NewFileSize);\r | |
1298 | }\r | |
1299 | NewFile->Type = EFI_FV_FILETYPE_FREEFORM;\r | |
30fdf114 | 1300 | NewFile->IntegrityCheck.Checksum.Header =\r |
e4ac870f | 1301 | FvBufCalculateChecksum8 ((UINT8*)NewFile, FfsHdrLen);\r |
30fdf114 LG |
1302 | NewFile->IntegrityCheck.Checksum.File = FFS_FIXED_CHECKSUM;\r |
1303 | NewFile->State = (UINT8)~( EFI_FILE_HEADER_CONSTRUCTION |\r | |
1304 | EFI_FILE_HEADER_VALID |\r | |
1305 | EFI_FILE_DATA_VALID\r | |
1306 | );\r | |
1307 | \r | |
1308 | *FfsFile = NewFile;\r | |
1309 | \r | |
1310 | return EFI_SUCCESS;\r | |
1311 | }\r | |
1312 | \r | |
1313 | \r | |
1314 | EFI_STATUS\r | |
1315 | FvBufFindNextSection (\r | |
1316 | IN VOID *SectionsStart,\r | |
1317 | IN UINTN TotalSectionsSize,\r | |
1318 | IN OUT UINTN *Key,\r | |
1319 | OUT VOID **Section\r | |
1320 | )\r | |
1321 | /*++\r | |
1322 | \r | |
1323 | Routine Description:\r | |
1324 | \r | |
1325 | Iterates through the sections contained within a given array of sections\r | |
1326 | \r | |
1327 | Arguments:\r | |
1328 | \r | |
1329 | SectionsStart - Address of the start of the FFS sections array\r | |
1330 | TotalSectionsSize - Total size of all the sections\r | |
1331 | Key - Should be 0 to get the first section. After that, it should be\r | |
1332 | passed back in without modifying it's contents to retrieve\r | |
1333 | subsequent files.\r | |
1334 | Section - Output section pointer\r | |
1335 | (Section == NULL) -> invalid parameter\r | |
1336 | otherwise -> *Section will be update to the location of the file\r | |
1337 | \r | |
1338 | Returns:\r | |
1339 | \r | |
1340 | EFI_SUCCESS\r | |
1341 | EFI_NOT_FOUND\r | |
1342 | EFI_VOLUME_CORRUPTED\r | |
1343 | \r | |
1344 | --*/\r | |
1345 | {\r | |
1346 | EFI_COMMON_SECTION_HEADER *sectionHdr;\r | |
1347 | UINTN sectionSize;\r | |
1348 | \r | |
1349 | *Key = (UINTN)ALIGN_POINTER (*Key, 4); // Sections are DWORD aligned\r | |
1350 | \r | |
1351 | if ((*Key + sizeof (*sectionHdr)) > TotalSectionsSize) {\r | |
1352 | return EFI_NOT_FOUND;\r | |
1353 | }\r | |
1354 | \r | |
1355 | sectionHdr = (EFI_COMMON_SECTION_HEADER*)((UINT8*)SectionsStart + *Key);\r | |
e4ac870f | 1356 | sectionSize = FvBufGetSecFileLen (sectionHdr);\r |
30fdf114 LG |
1357 | \r |
1358 | if (sectionSize < sizeof (EFI_COMMON_SECTION_HEADER)) {\r | |
1359 | return EFI_NOT_FOUND;\r | |
1360 | }\r | |
1361 | \r | |
1362 | if ((*Key + sectionSize) > TotalSectionsSize) {\r | |
1363 | return EFI_NOT_FOUND;\r | |
1364 | }\r | |
1365 | \r | |
1366 | *Section = (UINT8*)sectionHdr;\r | |
1367 | *Key = *Key + sectionSize;\r | |
1368 | return EFI_SUCCESS;\r | |
1369 | \r | |
1370 | }\r | |
1371 | \r | |
1372 | \r | |
1373 | EFI_STATUS\r | |
1374 | FvBufCountSections (\r | |
1375 | IN VOID* FfsFile,\r | |
1376 | IN UINTN* Count\r | |
1377 | )\r | |
1378 | /*++\r | |
1379 | \r | |
1380 | Routine Description:\r | |
1381 | \r | |
1382 | Searches the FFS file and counts the number of sections found.\r | |
1383 | The sections are NOT recursed.\r | |
1384 | \r | |
1385 | Arguments:\r | |
1386 | \r | |
1387 | FfsFile - Address of the FFS file in memory\r | |
1388 | Count - The location to store the section count in\r | |
1389 | \r | |
1390 | Returns:\r | |
1391 | \r | |
1392 | EFI_SUCCESS\r | |
1393 | EFI_NOT_FOUND\r | |
1394 | EFI_VOLUME_CORRUPTED\r | |
1395 | \r | |
1396 | --*/\r | |
1397 | {\r | |
1398 | EFI_STATUS Status;\r | |
1399 | UINTN Key;\r | |
1400 | VOID* SectionStart;\r | |
1401 | UINTN TotalSectionsSize;\r | |
1402 | EFI_COMMON_SECTION_HEADER* NextSection;\r | |
1403 | \r | |
e4ac870f | 1404 | SectionStart = (VOID*)((UINTN)FfsFile + FvBufGetFfsHeaderSize(FfsFile));\r |
30fdf114 | 1405 | TotalSectionsSize =\r |
e4ac870f LG |
1406 | FvBufGetFfsFileSize ((EFI_FFS_FILE_HEADER*)FfsFile) -\r |
1407 | FvBufGetFfsHeaderSize(FfsFile);\r | |
30fdf114 LG |
1408 | Key = 0;\r |
1409 | *Count = 0;\r | |
1410 | while (TRUE) {\r | |
1411 | Status = FvBufFindNextSection (\r | |
1412 | SectionStart,\r | |
1413 | TotalSectionsSize,\r | |
1414 | &Key,\r | |
1415 | (VOID **)&NextSection\r | |
1416 | );\r | |
1417 | if (Status == EFI_NOT_FOUND) {\r | |
1418 | return EFI_SUCCESS;\r | |
1419 | } else if (EFI_ERROR (Status)) {\r | |
1420 | return Status;\r | |
1421 | }\r | |
1422 | \r | |
1423 | //\r | |
1424 | // Increment the section counter\r | |
1425 | //\r | |
1426 | *Count += 1;\r | |
1427 | \r | |
1428 | }\r | |
1429 | \r | |
1430 | return EFI_NOT_FOUND;\r | |
1431 | }\r | |
1432 | \r | |
1433 | \r | |
1434 | EFI_STATUS\r | |
1435 | FvBufFindSectionByType (\r | |
1436 | IN VOID *FfsFile,\r | |
1437 | IN UINT8 Type,\r | |
1438 | OUT VOID **Section\r | |
1439 | )\r | |
1440 | /*++\r | |
1441 | \r | |
1442 | Routine Description:\r | |
1443 | \r | |
1444 | Searches the FFS file for a section by its type\r | |
1445 | \r | |
1446 | Arguments:\r | |
1447 | \r | |
1448 | FfsFile - Address of the FFS file in memory\r | |
1449 | Type - FFS FILE section type to search for\r | |
1450 | Section - Output section pointer\r | |
1451 | (Section == NULL) -> Only determine if the section exists, based on return\r | |
1452 | value from the function call.\r | |
1453 | otherwise -> *Section will be update to the location of the file\r | |
1454 | \r | |
1455 | Returns:\r | |
1456 | \r | |
1457 | EFI_SUCCESS\r | |
1458 | EFI_NOT_FOUND\r | |
1459 | EFI_VOLUME_CORRUPTED\r | |
1460 | \r | |
1461 | --*/\r | |
1462 | {\r | |
1463 | EFI_STATUS Status;\r | |
1464 | UINTN Key;\r | |
1465 | VOID* SectionStart;\r | |
1466 | UINTN TotalSectionsSize;\r | |
1467 | EFI_COMMON_SECTION_HEADER* NextSection;\r | |
1468 | \r | |
e4ac870f | 1469 | SectionStart = (VOID*)((UINTN)FfsFile + FvBufGetFfsHeaderSize(FfsFile));\r |
30fdf114 | 1470 | TotalSectionsSize =\r |
e4ac870f LG |
1471 | FvBufGetFfsFileSize ((EFI_FFS_FILE_HEADER*)FfsFile) -\r |
1472 | FvBufGetFfsHeaderSize(FfsFile);\r | |
30fdf114 LG |
1473 | Key = 0;\r |
1474 | while (TRUE) {\r | |
1475 | Status = FvBufFindNextSection (\r | |
1476 | SectionStart,\r | |
1477 | TotalSectionsSize,\r | |
1478 | &Key,\r | |
1479 | (VOID **)&NextSection\r | |
1480 | );\r | |
1481 | if (EFI_ERROR (Status)) {\r | |
1482 | return Status;\r | |
1483 | }\r | |
1484 | \r | |
1485 | if (Type == NextSection->Type) {\r | |
1486 | if (Section != NULL) {\r | |
1487 | *Section = NextSection;\r | |
1488 | }\r | |
1489 | return EFI_SUCCESS;\r | |
1490 | }\r | |
1491 | }\r | |
1492 | \r | |
1493 | return EFI_NOT_FOUND;\r | |
1494 | }\r | |
1495 | \r | |
1496 | \r | |
1497 | EFI_STATUS\r | |
1498 | FvBufShrinkWrap (\r | |
1499 | IN VOID *Fv\r | |
1500 | )\r | |
1501 | /*++\r | |
1502 | \r | |
1503 | Routine Description:\r | |
1504 | \r | |
1505 | Shrinks a firmware volume (in place) to provide a minimal FV.\r | |
1506 | \r | |
1507 | BUGBUG: Does not handle the case where the firmware volume has a\r | |
1508 | VTF (Volume Top File). The VTF will not be moved to the\r | |
1509 | end of the extended FV.\r | |
1510 | \r | |
1511 | Arguments:\r | |
1512 | \r | |
1513 | Fv - Firmware volume.\r | |
1514 | \r | |
1515 | Returns:\r | |
1516 | \r | |
1517 | EFI_SUCCESS\r | |
1518 | \r | |
1519 | --*/\r | |
1520 | {\r | |
1521 | EFI_STATUS Status;\r | |
1522 | UINTN OldSize;\r | |
1523 | UINT32 BlockCount;\r | |
1524 | UINT32 NewBlockSize = 128;\r | |
1525 | UINTN Key;\r | |
1526 | EFI_FFS_FILE_HEADER* FileIt;\r | |
1527 | VOID* EndOfLastFile;\r | |
1528 | \r | |
1529 | EFI_FIRMWARE_VOLUME_HEADER* FvHdr;\r | |
1530 | \r | |
1531 | Status = FvBufGetSize (Fv, &OldSize);\r | |
1532 | if (EFI_ERROR (Status)) {\r | |
1533 | return Status;\r | |
1534 | }\r | |
1535 | \r | |
1536 | Status = FvBufUnifyBlockSizes (Fv, NewBlockSize);\r | |
1537 | if (EFI_ERROR (Status)) {\r | |
1538 | return Status;\r | |
1539 | }\r | |
1540 | \r | |
1541 | //\r | |
1542 | // Locate the block map in the fv header\r | |
1543 | //\r | |
1544 | FvHdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
1545 | \r | |
1546 | //\r | |
1547 | // Find the end of the last file\r | |
1548 | //\r | |
1549 | Key = 0;\r | |
1550 | EndOfLastFile = (UINT8*)FvHdr + FvHdr->FvLength;\r | |
1551 | while (!EFI_ERROR (FvBufFindNextFile (Fv, &Key, (VOID **)&FileIt))) {\r | |
1552 | EndOfLastFile =\r | |
e4ac870f | 1553 | (VOID*)((UINT8*)FileIt + FvBufGetFfsFileSize (FileIt));\r |
30fdf114 LG |
1554 | }\r |
1555 | \r | |
1556 | //\r | |
1557 | // Set the BlockCount to have the minimal number of blocks for the Fv.\r | |
1558 | //\r | |
1559 | BlockCount = (UINT32)((UINTN)EndOfLastFile - (UINTN)Fv);\r | |
1560 | BlockCount = BlockCount + NewBlockSize - 1;\r | |
1561 | BlockCount = BlockCount / NewBlockSize;\r | |
1562 | \r | |
1563 | //\r | |
1564 | // Adjust the block count to shrink the Fv in place.\r | |
1565 | //\r | |
1566 | FvHdr->BlockMap[0].NumBlocks = BlockCount;\r | |
1567 | FvHdr->FvLength = BlockCount * NewBlockSize;\r | |
1568 | \r | |
1569 | //\r | |
1570 | // Update the FV header checksum\r | |
1571 | //\r | |
1572 | FvBufChecksumHeader (Fv);\r | |
1573 | \r | |
1574 | return EFI_SUCCESS;\r | |
1575 | \r | |
1576 | }\r | |
1577 | \r | |
1578 | \r | |
1579 | EFI_STATUS\r | |
1580 | FvBufUnifyBlockSizes (\r | |
1581 | IN OUT VOID *Fv,\r | |
1582 | IN UINTN BlockSize\r | |
1583 | )\r | |
1584 | /*++\r | |
1585 | \r | |
1586 | Routine Description:\r | |
1587 | \r | |
1588 | Searches the FFS file for a section by its type\r | |
1589 | \r | |
1590 | Arguments:\r | |
1591 | \r | |
1592 | Fv - Address of the Fv in memory\r | |
1593 | BlockSize - The size of the blocks to convert the Fv to. If the total size\r | |
1594 | of the Fv is not evenly divisible by this size, then\r | |
1595 | EFI_INVALID_PARAMETER will be returned.\r | |
1596 | \r | |
1597 | Returns:\r | |
1598 | \r | |
1599 | EFI_SUCCESS\r | |
1600 | EFI_NOT_FOUND\r | |
1601 | EFI_VOLUME_CORRUPTED\r | |
1602 | \r | |
1603 | --*/\r | |
1604 | {\r | |
1605 | EFI_FIRMWARE_VOLUME_HEADER *hdr = (EFI_FIRMWARE_VOLUME_HEADER*)Fv;\r | |
1606 | EFI_FV_BLOCK_MAP_ENTRY *blk = hdr->BlockMap;\r | |
1607 | UINT32 Size;\r | |
1608 | \r | |
1609 | Size = 0;\r | |
1610 | \r | |
1611 | //\r | |
1612 | // Scan through the block map list, performing error checking, and adding\r | |
1613 | // up the total Fv size.\r | |
1614 | //\r | |
1615 | while( blk->Length != 0 ||\r | |
1616 | blk->NumBlocks != 0\r | |
1617 | ) {\r | |
1618 | Size = Size + (blk->Length * blk->NumBlocks);\r | |
1619 | blk++;\r | |
1620 | if ((UINT8*)blk > ((UINT8*)hdr + hdr->HeaderLength)) {\r | |
1621 | return EFI_VOLUME_CORRUPTED;\r | |
1622 | }\r | |
1623 | }\r | |
1624 | \r | |
1625 | //\r | |
1626 | // Make sure that the Fv size is a multiple of the new block size.\r | |
1627 | //\r | |
1628 | if ((Size % BlockSize) != 0) {\r | |
1629 | return EFI_INVALID_PARAMETER;\r | |
1630 | }\r | |
1631 | \r | |
1632 | //\r | |
1633 | // Zero out the entire block map.\r | |
1634 | //\r | |
1635 | CommonLibBinderSetMem (\r | |
1636 | &hdr->BlockMap,\r | |
1637 | (UINTN)blk - (UINTN)&hdr->BlockMap,\r | |
1638 | 0\r | |
1639 | );\r | |
1640 | \r | |
1641 | //\r | |
1642 | // Write out the single block map entry.\r | |
1643 | //\r | |
1644 | hdr->BlockMap[0].Length = (UINT32)BlockSize;\r | |
1645 | hdr->BlockMap[0].NumBlocks = Size / (UINT32)BlockSize;\r | |
1646 | \r | |
1647 | return EFI_SUCCESS;\r | |
1648 | }\r | |
1649 | \r | |
1650 | STATIC\r | |
1651 | UINT16\r | |
1652 | FvBufCalculateSum16 (\r | |
1653 | IN UINT16 *Buffer,\r | |
1654 | IN UINTN Size\r | |
1655 | )\r | |
1656 | /*++\r | |
1657 | \r | |
1658 | Routine Description:\r | |
1659 | \r | |
1660 | This function calculates the UINT16 sum for the requested region.\r | |
1661 | \r | |
1662 | Arguments:\r | |
1663 | \r | |
1664 | Buffer Pointer to buffer containing byte data of component.\r | |
1665 | Size Size of the buffer\r | |
1666 | \r | |
1667 | Returns:\r | |
1668 | \r | |
1669 | The 16 bit checksum\r | |
1670 | \r | |
1671 | --*/\r | |
1672 | {\r | |
1673 | UINTN Index;\r | |
1674 | UINT16 Sum;\r | |
1675 | \r | |
1676 | Sum = 0;\r | |
1677 | \r | |
1678 | //\r | |
1679 | // Perform the word sum for buffer\r | |
1680 | //\r | |
1681 | for (Index = 0; Index < Size; Index++) {\r | |
1682 | Sum = (UINT16) (Sum + Buffer[Index]);\r | |
1683 | }\r | |
1684 | \r | |
1685 | return (UINT16) Sum;\r | |
1686 | }\r | |
1687 | \r | |
1688 | \r | |
1689 | STATIC\r | |
1690 | UINT16\r | |
1691 | FvBufCalculateChecksum16 (\r | |
1692 | IN UINT16 *Buffer,\r | |
1693 | IN UINTN Size\r | |
1694 | )\r | |
1695 | /*++\r | |
1696 | \r | |
1697 | Routine Description::\r | |
1698 | \r | |
1699 | This function calculates the value needed for a valid UINT16 checksum\r | |
1700 | \r | |
1701 | Arguments:\r | |
1702 | \r | |
1703 | Buffer Pointer to buffer containing byte data of component.\r | |
1704 | Size Size of the buffer\r | |
1705 | \r | |
1706 | Returns:\r | |
1707 | \r | |
1708 | The 16 bit checksum value needed.\r | |
1709 | \r | |
1710 | --*/\r | |
1711 | {\r | |
1712 | return (UINT16)(0x10000 - FvBufCalculateSum16 (Buffer, Size));\r | |
1713 | }\r | |
1714 | \r | |
1715 | \r | |
1716 | STATIC\r | |
1717 | UINT8\r | |
1718 | FvBufCalculateSum8 (\r | |
1719 | IN UINT8 *Buffer,\r | |
1720 | IN UINTN Size\r | |
1721 | )\r | |
1722 | /*++\r | |
1723 | \r | |
1724 | Description:\r | |
1725 | \r | |
1726 | This function calculates the UINT8 sum for the requested region.\r | |
1727 | \r | |
1728 | Input:\r | |
1729 | \r | |
1730 | Buffer Pointer to buffer containing byte data of component.\r | |
1731 | Size Size of the buffer\r | |
1732 | \r | |
1733 | Return:\r | |
1734 | \r | |
1735 | The 8 bit checksum value needed.\r | |
1736 | \r | |
1737 | --*/\r | |
1738 | {\r | |
1739 | UINTN Index;\r | |
1740 | UINT8 Sum;\r | |
1741 | \r | |
1742 | Sum = 0;\r | |
1743 | \r | |
1744 | //\r | |
1745 | // Perform the byte sum for buffer\r | |
1746 | //\r | |
1747 | for (Index = 0; Index < Size; Index++) {\r | |
1748 | Sum = (UINT8) (Sum + Buffer[Index]);\r | |
1749 | }\r | |
1750 | \r | |
1751 | return Sum;\r | |
1752 | }\r | |
1753 | \r | |
1754 | \r | |
1755 | STATIC\r | |
1756 | UINT8\r | |
1757 | FvBufCalculateChecksum8 (\r | |
1758 | IN UINT8 *Buffer,\r | |
1759 | IN UINTN Size\r | |
1760 | )\r | |
1761 | /*++\r | |
1762 | \r | |
1763 | Description:\r | |
1764 | \r | |
1765 | This function calculates the value needed for a valid UINT8 checksum\r | |
1766 | \r | |
1767 | Input:\r | |
1768 | \r | |
1769 | Buffer Pointer to buffer containing byte data of component.\r | |
1770 | Size Size of the buffer\r | |
1771 | \r | |
1772 | Return:\r | |
1773 | \r | |
1774 | The 8 bit checksum value needed.\r | |
1775 | \r | |
1776 | --*/\r | |
1777 | {\r | |
1778 | return (UINT8)(0x100 - FvBufCalculateSum8 (Buffer, Size));\r | |
1779 | }\r | |
1780 | \r | |
1781 | \r |