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MdeModulePkg/UefiBootManagerLib: Expose *GetLoadOptionBuffer() API
[mirror_edk2.git] / MdeModulePkg / Library / UefiBootManagerLib / BmLoadOption.c
1 /** @file
2 Load option library functions which relate with creating and processing load options.
3
4 Copyright (c) 2011 - 2016, Intel Corporation. All rights reserved.<BR>
5 (C) Copyright 2015-2016 Hewlett Packard Enterprise Development LP<BR>
6 This program and the accompanying materials
7 are licensed and made available under the terms and conditions of the BSD License
8 which accompanies this distribution. The full text of the license may be found at
9 http://opensource.org/licenses/bsd-license.php
10
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
13
14 **/
15
16 #include "InternalBm.h"
17
18 GLOBAL_REMOVE_IF_UNREFERENCED
19 CHAR16 *mBmLoadOptionName[] = {
20 L"Driver",
21 L"SysPrep",
22 L"Boot",
23 L"PlatformRecovery"
24 };
25
26 GLOBAL_REMOVE_IF_UNREFERENCED
27 CHAR16 *mBmLoadOptionOrderName[] = {
28 EFI_DRIVER_ORDER_VARIABLE_NAME,
29 EFI_SYS_PREP_ORDER_VARIABLE_NAME,
30 EFI_BOOT_ORDER_VARIABLE_NAME,
31 NULL // PlatformRecovery#### doesn't have associated *Order variable
32 };
33
34 /**
35 Call Visitor function for each variable in variable storage.
36
37 @param Visitor Visitor function.
38 @param Context The context passed to Visitor function.
39 **/
40 VOID
41 BmForEachVariable (
42 BM_VARIABLE_VISITOR Visitor,
43 VOID *Context
44 )
45 {
46 EFI_STATUS Status;
47 CHAR16 *Name;
48 EFI_GUID Guid;
49 UINTN NameSize;
50 UINTN NewNameSize;
51
52 NameSize = sizeof (CHAR16);
53 Name = AllocateZeroPool (NameSize);
54 ASSERT (Name != NULL);
55 while (TRUE) {
56 NewNameSize = NameSize;
57 Status = gRT->GetNextVariableName (&NewNameSize, Name, &Guid);
58 if (Status == EFI_BUFFER_TOO_SMALL) {
59 Name = ReallocatePool (NameSize, NewNameSize, Name);
60 ASSERT (Name != NULL);
61 Status = gRT->GetNextVariableName (&NewNameSize, Name, &Guid);
62 NameSize = NewNameSize;
63 }
64
65 if (Status == EFI_NOT_FOUND) {
66 break;
67 }
68 ASSERT_EFI_ERROR (Status);
69
70 Visitor (Name, &Guid, Context);
71 }
72
73 FreePool (Name);
74 }
75
76 /**
77 Get the Option Number that wasn't used.
78
79 @param LoadOptionType The load option type.
80 @param FreeOptionNumber Return the minimal free option number.
81
82 @retval EFI_SUCCESS The option number is found and will be returned.
83 @retval EFI_OUT_OF_RESOURCES There is no free option number that can be used.
84 @retval EFI_INVALID_PARAMETER FreeOptionNumber is NULL
85
86 **/
87 EFI_STATUS
88 BmGetFreeOptionNumber (
89 IN EFI_BOOT_MANAGER_LOAD_OPTION_TYPE LoadOptionType,
90 OUT UINT16 *FreeOptionNumber
91 )
92 {
93
94 UINTN OptionNumber;
95 UINTN Index;
96 UINT16 *OptionOrder;
97 UINTN OptionOrderSize;
98 UINT16 *BootNext;
99
100 ASSERT (FreeOptionNumber != NULL);
101 ASSERT (LoadOptionType == LoadOptionTypeDriver ||
102 LoadOptionType == LoadOptionTypeBoot ||
103 LoadOptionType == LoadOptionTypeSysPrep);
104
105 GetEfiGlobalVariable2 (mBmLoadOptionOrderName[LoadOptionType], (VOID **) &OptionOrder, &OptionOrderSize);
106 ASSERT ((OptionOrder != NULL && OptionOrderSize != 0) || (OptionOrder == NULL && OptionOrderSize == 0));
107
108 BootNext = NULL;
109 if (LoadOptionType == LoadOptionTypeBoot) {
110 GetEfiGlobalVariable2 (L"BootNext", (VOID**) &BootNext, NULL);
111 }
112
113 for (OptionNumber = 0;
114 OptionNumber < OptionOrderSize / sizeof (UINT16)
115 + ((BootNext != NULL) ? 1 : 0);
116 OptionNumber++
117 ) {
118 //
119 // Search in OptionOrder whether the OptionNumber exists
120 //
121 for (Index = 0; Index < OptionOrderSize / sizeof (UINT16); Index++) {
122 if (OptionNumber == OptionOrder[Index]) {
123 break;
124 }
125 }
126
127 //
128 // We didn't find it in the ****Order array and it doesn't equal to BootNext
129 // Otherwise, OptionNumber equals to OptionOrderSize / sizeof (UINT16) + 1
130 //
131 if ((Index == OptionOrderSize / sizeof (UINT16)) &&
132 ((BootNext == NULL) || (OptionNumber != *BootNext))
133 ) {
134 break;
135 }
136 }
137 if (OptionOrder != NULL) {
138 FreePool (OptionOrder);
139 }
140
141 if (BootNext != NULL) {
142 FreePool (BootNext);
143 }
144
145 //
146 // When BootOrder & BootNext conver all numbers in the range [0 ... 0xffff],
147 // OptionNumber equals to 0x10000 which is not valid.
148 //
149 ASSERT (OptionNumber <= 0x10000);
150 if (OptionNumber == 0x10000) {
151 return EFI_OUT_OF_RESOURCES;
152 } else {
153 *FreeOptionNumber = (UINT16) OptionNumber;
154 return EFI_SUCCESS;
155 }
156 }
157
158 /**
159 Create the Boot####, Driver####, SysPrep####, PlatformRecovery#### variable
160 from the load option.
161
162 @param LoadOption Pointer to the load option.
163
164 @retval EFI_SUCCESS The variable was created.
165 @retval Others Error status returned by RT->SetVariable.
166 **/
167 EFI_STATUS
168 EFIAPI
169 EfiBootManagerLoadOptionToVariable (
170 IN CONST EFI_BOOT_MANAGER_LOAD_OPTION *Option
171 )
172 {
173 EFI_STATUS Status;
174 UINTN VariableSize;
175 UINT8 *Variable;
176 UINT8 *Ptr;
177 CHAR16 OptionName[BM_OPTION_NAME_LEN];
178 CHAR16 *Description;
179 CHAR16 NullChar;
180 EDKII_VARIABLE_LOCK_PROTOCOL *VariableLock;
181 UINT32 VariableAttributes;
182
183 if ((Option->OptionNumber == LoadOptionNumberUnassigned) ||
184 (Option->FilePath == NULL) ||
185 ((UINT32) Option->OptionType >= LoadOptionTypeMax)
186 ) {
187 return EFI_INVALID_PARAMETER;
188 }
189
190 //
191 // Convert NULL description to empty description
192 //
193 NullChar = L'\0';
194 Description = Option->Description;
195 if (Description == NULL) {
196 Description = &NullChar;
197 }
198
199 /*
200 UINT32 Attributes;
201 UINT16 FilePathListLength;
202 CHAR16 Description[];
203 EFI_DEVICE_PATH_PROTOCOL FilePathList[];
204 UINT8 OptionalData[];
205 TODO: FilePathList[] IS:
206 A packed array of UEFI device paths. The first element of the
207 array is a device path that describes the device and location of the
208 Image for this load option. The FilePathList[0] is specific
209 to the device type. Other device paths may optionally exist in the
210 FilePathList, but their usage is OSV specific. Each element
211 in the array is variable length, and ends at the device path end
212 structure.
213 */
214 VariableSize = sizeof (Option->Attributes)
215 + sizeof (UINT16)
216 + StrSize (Description)
217 + GetDevicePathSize (Option->FilePath)
218 + Option->OptionalDataSize;
219
220 Variable = AllocatePool (VariableSize);
221 ASSERT (Variable != NULL);
222
223 Ptr = Variable;
224 WriteUnaligned32 ((UINT32 *) Ptr, Option->Attributes);
225 Ptr += sizeof (Option->Attributes);
226
227 WriteUnaligned16 ((UINT16 *) Ptr, (UINT16) GetDevicePathSize (Option->FilePath));
228 Ptr += sizeof (UINT16);
229
230 CopyMem (Ptr, Description, StrSize (Description));
231 Ptr += StrSize (Description);
232
233 CopyMem (Ptr, Option->FilePath, GetDevicePathSize (Option->FilePath));
234 Ptr += GetDevicePathSize (Option->FilePath);
235
236 CopyMem (Ptr, Option->OptionalData, Option->OptionalDataSize);
237
238 UnicodeSPrint (OptionName, sizeof (OptionName), L"%s%04x", mBmLoadOptionName[Option->OptionType], Option->OptionNumber);
239
240 VariableAttributes = EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE;
241 if (Option->OptionType == LoadOptionTypePlatformRecovery) {
242 //
243 // Lock the PlatformRecovery####
244 //
245 Status = gBS->LocateProtocol (&gEdkiiVariableLockProtocolGuid, NULL, (VOID **) &VariableLock);
246 if (!EFI_ERROR (Status)) {
247 Status = VariableLock->RequestToLock (VariableLock, OptionName, &gEfiGlobalVariableGuid);
248 ASSERT_EFI_ERROR (Status);
249 }
250 VariableAttributes = EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS;
251 }
252
253 return gRT->SetVariable (
254 OptionName,
255 &gEfiGlobalVariableGuid,
256 VariableAttributes,
257 VariableSize,
258 Variable
259 );
260 }
261
262 /**
263 Update order variable .
264
265 @param OptionOrderName Order variable name which need to be updated.
266 @param OptionNumber Option number for the new option.
267 @param Position Position of the new load option to put in the ****Order variable.
268
269 @retval EFI_SUCCESS The boot#### or driver#### have been successfully registered.
270 @retval EFI_ALREADY_STARTED The option number of Option is being used already.
271 @retval EFI_STATUS Return the status of gRT->SetVariable ().
272
273 **/
274 EFI_STATUS
275 BmAddOptionNumberToOrderVariable (
276 IN CHAR16 *OptionOrderName,
277 IN UINT16 OptionNumber,
278 IN UINTN Position
279 )
280 {
281 EFI_STATUS Status;
282 UINTN Index;
283 UINT16 *OptionOrder;
284 UINT16 *NewOptionOrder;
285 UINTN OptionOrderSize;
286 //
287 // Update the option order variable
288 //
289 GetEfiGlobalVariable2 (OptionOrderName, (VOID **) &OptionOrder, &OptionOrderSize);
290 ASSERT ((OptionOrder != NULL && OptionOrderSize != 0) || (OptionOrder == NULL && OptionOrderSize == 0));
291
292 Status = EFI_SUCCESS;
293 for (Index = 0; Index < OptionOrderSize / sizeof (UINT16); Index++) {
294 if (OptionOrder[Index] == OptionNumber) {
295 Status = EFI_ALREADY_STARTED;
296 break;
297 }
298 }
299
300 if (!EFI_ERROR (Status)) {
301 Position = MIN (Position, OptionOrderSize / sizeof (UINT16));
302
303 NewOptionOrder = AllocatePool (OptionOrderSize + sizeof (UINT16));
304 ASSERT (NewOptionOrder != NULL);
305 if (OptionOrderSize != 0) {
306 CopyMem (NewOptionOrder, OptionOrder, Position * sizeof (UINT16));
307 CopyMem (&NewOptionOrder[Position + 1], &OptionOrder[Position], OptionOrderSize - Position * sizeof (UINT16));
308 }
309 NewOptionOrder[Position] = OptionNumber;
310
311 Status = gRT->SetVariable (
312 OptionOrderName,
313 &gEfiGlobalVariableGuid,
314 EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
315 OptionOrderSize + sizeof (UINT16),
316 NewOptionOrder
317 );
318 FreePool (NewOptionOrder);
319 }
320
321 if (OptionOrder != NULL) {
322 FreePool (OptionOrder);
323 }
324
325 return Status;
326 }
327
328 /**
329 This function will register the new Boot####, Driver#### or SysPrep#### option.
330 After the *#### is updated, the *Order will also be updated.
331
332 @param Option Pointer to load option to add.
333 @param Position Position of the new load option to put in the ****Order variable.
334
335 @retval EFI_SUCCESS The *#### have been successfully registered.
336 @retval EFI_INVALID_PARAMETER The option number exceeds 0xFFFF.
337 @retval EFI_ALREADY_STARTED The option number of Option is being used already.
338 Note: this API only adds new load option, no replacement support.
339 @retval EFI_OUT_OF_RESOURCES There is no free option number that can be used when the
340 option number specified in the Option is LoadOptionNumberUnassigned.
341 @retval EFI_STATUS Return the status of gRT->SetVariable ().
342
343 **/
344 EFI_STATUS
345 EFIAPI
346 EfiBootManagerAddLoadOptionVariable (
347 IN EFI_BOOT_MANAGER_LOAD_OPTION *Option,
348 IN UINTN Position
349 )
350 {
351 EFI_STATUS Status;
352 UINT16 OptionNumber;
353
354 if (Option == NULL) {
355 return EFI_INVALID_PARAMETER;
356 }
357
358 if (Option->OptionType != LoadOptionTypeDriver &&
359 Option->OptionType != LoadOptionTypeSysPrep &&
360 Option->OptionType != LoadOptionTypeBoot
361 ) {
362 return EFI_INVALID_PARAMETER;
363 }
364
365 //
366 // Get the free option number if the option number is unassigned
367 //
368 if (Option->OptionNumber == LoadOptionNumberUnassigned) {
369 Status = BmGetFreeOptionNumber (Option->OptionType, &OptionNumber);
370 if (EFI_ERROR (Status)) {
371 return Status;
372 }
373 Option->OptionNumber = OptionNumber;
374 }
375
376 if (Option->OptionNumber >= LoadOptionNumberMax) {
377 return EFI_INVALID_PARAMETER;
378 }
379
380 Status = BmAddOptionNumberToOrderVariable (mBmLoadOptionOrderName[Option->OptionType], (UINT16) Option->OptionNumber, Position);
381 if (!EFI_ERROR (Status)) {
382 //
383 // Save the Boot#### or Driver#### variable
384 //
385 Status = EfiBootManagerLoadOptionToVariable (Option);
386 if (EFI_ERROR (Status)) {
387 //
388 // Remove the #### from *Order variable when the Driver####/SysPrep####/Boot#### cannot be saved.
389 //
390 EfiBootManagerDeleteLoadOptionVariable (Option->OptionNumber, Option->OptionType);
391 }
392 }
393
394 return Status;
395 }
396
397 /**
398 Sort the load option. The DriverOrder or BootOrder will be re-created to
399 reflect the new order.
400
401 @param OptionType Load option type
402 @param CompareFunction The comparator
403 **/
404 VOID
405 EFIAPI
406 EfiBootManagerSortLoadOptionVariable (
407 EFI_BOOT_MANAGER_LOAD_OPTION_TYPE OptionType,
408 SORT_COMPARE CompareFunction
409 )
410 {
411 EFI_STATUS Status;
412 EFI_BOOT_MANAGER_LOAD_OPTION *LoadOption;
413 UINTN LoadOptionCount;
414 UINTN Index;
415 UINT16 *OptionOrder;
416
417 LoadOption = EfiBootManagerGetLoadOptions (&LoadOptionCount, OptionType);
418
419 //
420 // Insertion sort algorithm
421 //
422 PerformQuickSort (
423 LoadOption,
424 LoadOptionCount,
425 sizeof (EFI_BOOT_MANAGER_LOAD_OPTION),
426 CompareFunction
427 );
428
429 //
430 // Create new ****Order variable
431 //
432 OptionOrder = AllocatePool (LoadOptionCount * sizeof (UINT16));
433 ASSERT (OptionOrder != NULL);
434 for (Index = 0; Index < LoadOptionCount; Index++) {
435 OptionOrder[Index] = (UINT16) LoadOption[Index].OptionNumber;
436 }
437
438 Status = gRT->SetVariable (
439 mBmLoadOptionOrderName[OptionType],
440 &gEfiGlobalVariableGuid,
441 EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
442 LoadOptionCount * sizeof (UINT16),
443 OptionOrder
444 );
445 //
446 // Changing the *Order content without increasing its size with current variable implementation shouldn't fail.
447 //
448 ASSERT_EFI_ERROR (Status);
449
450 FreePool (OptionOrder);
451 EfiBootManagerFreeLoadOptions (LoadOption, LoadOptionCount);
452 }
453
454 /**
455 Initialize a load option.
456
457 @param Option Pointer to the load option to be initialized.
458 @param OptionNumber Option number of the load option.
459 @param OptionType Type of the load option.
460 @param Attributes Attributes of the load option.
461 @param Description Description of the load option.
462 @param FilePath Device path of the load option.
463 @param OptionalData Optional data of the load option.
464 @param OptionalDataSize Size of the optional data of the load option.
465
466 @retval EFI_SUCCESS The load option was initialized successfully.
467 @retval EFI_INVALID_PARAMETER Option, Description or FilePath is NULL.
468 **/
469 EFI_STATUS
470 EFIAPI
471 EfiBootManagerInitializeLoadOption (
472 IN OUT EFI_BOOT_MANAGER_LOAD_OPTION *Option,
473 IN UINTN OptionNumber,
474 IN EFI_BOOT_MANAGER_LOAD_OPTION_TYPE OptionType,
475 IN UINT32 Attributes,
476 IN CHAR16 *Description,
477 IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
478 IN UINT8 *OptionalData, OPTIONAL
479 IN UINT32 OptionalDataSize
480 )
481 {
482 if ((Option == NULL) || (Description == NULL) || (FilePath == NULL)) {
483 return EFI_INVALID_PARAMETER;
484 }
485
486 if (((OptionalData != NULL) && (OptionalDataSize == 0)) ||
487 ((OptionalData == NULL) && (OptionalDataSize != 0))) {
488 return EFI_INVALID_PARAMETER;
489 }
490
491 if ((UINT32) OptionType >= LoadOptionTypeMax) {
492 return EFI_INVALID_PARAMETER;
493 }
494
495 ZeroMem (Option, sizeof (EFI_BOOT_MANAGER_LOAD_OPTION));
496 Option->OptionNumber = OptionNumber;
497 Option->OptionType = OptionType;
498 Option->Attributes = Attributes;
499 Option->Description = AllocateCopyPool (StrSize (Description), Description);
500 Option->FilePath = DuplicateDevicePath (FilePath);
501 if (OptionalData != NULL) {
502 Option->OptionalData = AllocateCopyPool (OptionalDataSize, OptionalData);
503 Option->OptionalDataSize = OptionalDataSize;
504 }
505
506 return EFI_SUCCESS;
507 }
508
509
510 /**
511 Return the index of the load option in the load option array.
512
513 The function consider two load options are equal when the
514 OptionType, Attributes, Description, FilePath and OptionalData are equal.
515
516 @param Key Pointer to the load option to be found.
517 @param Array Pointer to the array of load options to be found.
518 @param Count Number of entries in the Array.
519
520 @retval -1 Key wasn't found in the Array.
521 @retval 0 ~ Count-1 The index of the Key in the Array.
522 **/
523 INTN
524 EFIAPI
525 EfiBootManagerFindLoadOption (
526 IN CONST EFI_BOOT_MANAGER_LOAD_OPTION *Key,
527 IN CONST EFI_BOOT_MANAGER_LOAD_OPTION *Array,
528 IN UINTN Count
529 )
530 {
531 UINTN Index;
532
533 for (Index = 0; Index < Count; Index++) {
534 if ((Key->OptionType == Array[Index].OptionType) &&
535 (Key->Attributes == Array[Index].Attributes) &&
536 (StrCmp (Key->Description, Array[Index].Description) == 0) &&
537 (CompareMem (Key->FilePath, Array[Index].FilePath, GetDevicePathSize (Key->FilePath)) == 0) &&
538 (Key->OptionalDataSize == Array[Index].OptionalDataSize) &&
539 (CompareMem (Key->OptionalData, Array[Index].OptionalData, Key->OptionalDataSize) == 0)) {
540 return (INTN) Index;
541 }
542 }
543
544 return -1;
545 }
546
547 /**
548 Delete the load option.
549
550 @param OptionNumber Indicate the option number of load option
551 @param OptionType Indicate the type of load option
552
553 @retval EFI_INVALID_PARAMETER OptionType or OptionNumber is invalid.
554 @retval EFI_NOT_FOUND The load option cannot be found
555 @retval EFI_SUCCESS The load option was deleted
556 @retval others Status of RT->SetVariable()
557 **/
558 EFI_STATUS
559 EFIAPI
560 EfiBootManagerDeleteLoadOptionVariable (
561 IN UINTN OptionNumber,
562 IN EFI_BOOT_MANAGER_LOAD_OPTION_TYPE OptionType
563 )
564 {
565 UINT16 *OptionOrder;
566 UINTN OptionOrderSize;
567 UINTN Index;
568 CHAR16 OptionName[BM_OPTION_NAME_LEN];
569
570 if (((UINT32) OptionType >= LoadOptionTypeMax) || (OptionNumber >= LoadOptionNumberMax)) {
571 return EFI_INVALID_PARAMETER;
572 }
573
574 if (OptionType == LoadOptionTypeDriver || OptionType == LoadOptionTypeSysPrep || OptionType == LoadOptionTypeBoot) {
575 //
576 // If the associated *Order exists, firstly remove the reference in *Order for
577 // Driver####, SysPrep#### and Boot####.
578 //
579 GetEfiGlobalVariable2 (mBmLoadOptionOrderName[OptionType], (VOID **) &OptionOrder, &OptionOrderSize);
580 ASSERT ((OptionOrder != NULL && OptionOrderSize != 0) || (OptionOrder == NULL && OptionOrderSize == 0));
581
582 for (Index = 0; Index < OptionOrderSize / sizeof (UINT16); Index++) {
583 if (OptionOrder[Index] == OptionNumber) {
584 OptionOrderSize -= sizeof (UINT16);
585 CopyMem (&OptionOrder[Index], &OptionOrder[Index + 1], OptionOrderSize - Index * sizeof (UINT16));
586 gRT->SetVariable (
587 mBmLoadOptionOrderName[OptionType],
588 &gEfiGlobalVariableGuid,
589 EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
590 OptionOrderSize,
591 OptionOrder
592 );
593 break;
594 }
595 }
596 if (OptionOrder != NULL) {
597 FreePool (OptionOrder);
598 }
599 }
600
601 //
602 // Remove the Driver####, SysPrep####, Boot#### or PlatformRecovery#### itself.
603 //
604 UnicodeSPrint (OptionName, sizeof (OptionName), L"%s%04x", mBmLoadOptionName[OptionType], OptionNumber);
605 return gRT->SetVariable (
606 OptionName,
607 &gEfiGlobalVariableGuid,
608 0,
609 0,
610 NULL
611 );
612 }
613
614 /**
615 Returns the size of a device path in bytes.
616
617 This function returns the size, in bytes, of the device path data structure
618 specified by DevicePath including the end of device path node. If DevicePath
619 is NULL, then 0 is returned. If the length of the device path is bigger than
620 MaxSize, also return 0 to indicate this is an invalidate device path.
621
622 @param DevicePath A pointer to a device path data structure.
623 @param MaxSize Max valid device path size. If big than this size,
624 return error.
625
626 @retval 0 An invalid device path.
627 @retval Others The size of a device path in bytes.
628
629 **/
630 UINTN
631 BmGetDevicePathSizeEx (
632 IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
633 IN UINTN MaxSize
634 )
635 {
636 UINTN Size;
637 UINTN NodeSize;
638
639 if (DevicePath == NULL) {
640 return 0;
641 }
642
643 //
644 // Search for the end of the device path structure
645 //
646 Size = 0;
647 while (!IsDevicePathEnd (DevicePath)) {
648 NodeSize = DevicePathNodeLength (DevicePath);
649 if (NodeSize == 0) {
650 return 0;
651 }
652 Size += NodeSize;
653 if (Size > MaxSize) {
654 return 0;
655 }
656 DevicePath = NextDevicePathNode (DevicePath);
657 }
658 Size += DevicePathNodeLength (DevicePath);
659 if (Size > MaxSize) {
660 return 0;
661 }
662
663 return Size;
664 }
665
666 /**
667 Returns the length of a Null-terminated Unicode string. If the length is
668 bigger than MaxStringLen, return length 0 to indicate that this is an
669 invalidate string.
670
671 This function returns the number of Unicode characters in the Null-terminated
672 Unicode string specified by String.
673
674 If String is NULL, then ASSERT().
675 If String is not aligned on a 16-bit boundary, then ASSERT().
676
677 @param String A pointer to a Null-terminated Unicode string.
678 @param MaxStringLen Max string len in this string.
679
680 @retval 0 An invalid string.
681 @retval Others The length of String.
682
683 **/
684 UINTN
685 BmStrSizeEx (
686 IN CONST CHAR16 *String,
687 IN UINTN MaxStringLen
688 )
689 {
690 UINTN Length;
691
692 ASSERT (String != NULL && MaxStringLen != 0);
693 ASSERT (((UINTN) String & BIT0) == 0);
694
695 for (Length = 0; *String != L'\0' && MaxStringLen != Length; String++, Length+=2);
696
697 if (*String != L'\0' && MaxStringLen == Length) {
698 return 0;
699 }
700
701 return Length + 2;
702 }
703
704 /**
705 Validate the Boot####, Driver####, SysPrep#### and PlatformRecovery####
706 variable (VendorGuid/Name)
707
708 @param Variable The variable data.
709 @param VariableSize The variable size.
710
711 @retval TRUE The variable data is correct.
712 @retval FALSE The variable data is corrupted.
713
714 **/
715 BOOLEAN
716 BmValidateOption (
717 UINT8 *Variable,
718 UINTN VariableSize
719 )
720 {
721 UINT16 FilePathSize;
722 EFI_DEVICE_PATH_PROTOCOL *DevicePath;
723 UINTN DescriptionSize;
724
725 if (VariableSize <= sizeof (UINT16) + sizeof (UINT32)) {
726 return FALSE;
727 }
728
729 //
730 // Skip the option attribute
731 //
732 Variable += sizeof (UINT32);
733
734 //
735 // Get the option's device path size
736 //
737 FilePathSize = ReadUnaligned16 ((UINT16 *) Variable);
738 Variable += sizeof (UINT16);
739
740 //
741 // Get the option's description string size
742 //
743 DescriptionSize = BmStrSizeEx ((CHAR16 *) Variable, VariableSize - sizeof (UINT16) - sizeof (UINT32));
744 Variable += DescriptionSize;
745
746 //
747 // Get the option's device path
748 //
749 DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) Variable;
750
751 //
752 // Validation boot option variable.
753 //
754 if ((FilePathSize == 0) || (DescriptionSize == 0)) {
755 return FALSE;
756 }
757
758 if (sizeof (UINT32) + sizeof (UINT16) + DescriptionSize + FilePathSize > VariableSize) {
759 return FALSE;
760 }
761
762 return (BOOLEAN) (BmGetDevicePathSizeEx (DevicePath, FilePathSize) != 0);
763 }
764
765 /**
766 Check whether the VariableName is a valid load option variable name
767 and return the load option type and option number.
768
769 @param VariableName The name of the load option variable.
770 @param OptionType Return the load option type.
771 @param OptionNumber Return the load option number.
772
773 @retval TRUE The variable name is valid; The load option type and
774 load option number is returned.
775 @retval FALSE The variable name is NOT valid.
776 **/
777 BOOLEAN
778 EFIAPI
779 EfiBootManagerIsValidLoadOptionVariableName (
780 IN CHAR16 *VariableName,
781 OUT EFI_BOOT_MANAGER_LOAD_OPTION_TYPE *OptionType OPTIONAL,
782 OUT UINT16 *OptionNumber OPTIONAL
783 )
784 {
785 UINTN VariableNameLen;
786 UINTN Index;
787 UINTN Uint;
788
789 if (VariableName == NULL) {
790 return FALSE;
791 }
792
793 VariableNameLen = StrLen (VariableName);
794
795 if (VariableNameLen <= 4) {
796 return FALSE;
797 }
798
799 for (Index = 0; Index < sizeof (mBmLoadOptionName) / sizeof (mBmLoadOptionName[0]); Index++) {
800 if ((VariableNameLen - 4 == StrLen (mBmLoadOptionName[Index])) &&
801 (StrnCmp (VariableName, mBmLoadOptionName[Index], VariableNameLen - 4) == 0)
802 ) {
803 break;
804 }
805 }
806
807 if (Index == sizeof (mBmLoadOptionName) / sizeof (mBmLoadOptionName[0])) {
808 return FALSE;
809 }
810
811 if (OptionType != NULL) {
812 *OptionType = (EFI_BOOT_MANAGER_LOAD_OPTION_TYPE) Index;
813 }
814
815 if (OptionNumber != NULL) {
816 *OptionNumber = 0;
817 for (Index = VariableNameLen - 4; Index < VariableNameLen; Index++) {
818 Uint = BmCharToUint (VariableName[Index]);
819 if (Uint == -1) {
820 break;
821 } else {
822 *OptionNumber = (UINT16) Uint + *OptionNumber * 0x10;
823 }
824 }
825 }
826
827 return (BOOLEAN) (Index == VariableNameLen);
828 }
829
830 /**
831 Build the Boot#### or Driver#### option from the VariableName.
832
833 @param VariableName Variable name of the load option
834 @param VendorGuid Variable GUID of the load option
835 @param Option Return the load option.
836
837 @retval EFI_SUCCESS Get the option just been created
838 @retval EFI_NOT_FOUND Failed to get the new option
839
840 **/
841 EFI_STATUS
842 EFIAPI
843 EfiBootManagerVariableToLoadOptionEx (
844 IN CHAR16 *VariableName,
845 IN EFI_GUID *VendorGuid,
846 IN OUT EFI_BOOT_MANAGER_LOAD_OPTION *Option
847 )
848 {
849 EFI_STATUS Status;
850 UINT32 Attribute;
851 UINT16 FilePathSize;
852 UINT8 *Variable;
853 UINT8 *VariablePtr;
854 UINTN VariableSize;
855 EFI_DEVICE_PATH_PROTOCOL *FilePath;
856 UINT8 *OptionalData;
857 UINT32 OptionalDataSize;
858 CHAR16 *Description;
859 EFI_BOOT_MANAGER_LOAD_OPTION_TYPE OptionType;
860 UINT16 OptionNumber;
861
862 if ((VariableName == NULL) || (Option == NULL)) {
863 return EFI_INVALID_PARAMETER;
864 }
865
866 if (!EfiBootManagerIsValidLoadOptionVariableName (VariableName, &OptionType, &OptionNumber)) {
867 return EFI_INVALID_PARAMETER;
868 }
869
870 //
871 // Read the variable
872 //
873 GetVariable2 (VariableName, VendorGuid, (VOID **) &Variable, &VariableSize);
874 if (Variable == NULL) {
875 return EFI_NOT_FOUND;
876 }
877
878 //
879 // Validate *#### variable data.
880 //
881 if (!BmValidateOption(Variable, VariableSize)) {
882 FreePool (Variable);
883 return EFI_INVALID_PARAMETER;
884 }
885
886 //
887 // Get the option attribute
888 //
889 VariablePtr = Variable;
890 Attribute = ReadUnaligned32 ((UINT32 *) VariablePtr);
891 VariablePtr += sizeof (UINT32);
892
893 //
894 // Get the option's device path size
895 //
896 FilePathSize = ReadUnaligned16 ((UINT16 *) VariablePtr);
897 VariablePtr += sizeof (UINT16);
898
899 //
900 // Get the option's description string
901 //
902 Description = (CHAR16 *) VariablePtr;
903
904 //
905 // Get the option's description string size
906 //
907 VariablePtr += StrSize ((CHAR16 *) VariablePtr);
908
909 //
910 // Get the option's device path
911 //
912 FilePath = (EFI_DEVICE_PATH_PROTOCOL *) VariablePtr;
913 VariablePtr += FilePathSize;
914
915 OptionalDataSize = (UINT32) (VariableSize - (UINTN) (VariablePtr - Variable));
916 if (OptionalDataSize == 0) {
917 OptionalData = NULL;
918 } else {
919 OptionalData = VariablePtr;
920 }
921
922 Status = EfiBootManagerInitializeLoadOption (
923 Option,
924 OptionNumber,
925 OptionType,
926 Attribute,
927 Description,
928 FilePath,
929 OptionalData,
930 OptionalDataSize
931 );
932 ASSERT_EFI_ERROR (Status);
933
934 CopyGuid (&Option->VendorGuid, VendorGuid);
935
936 FreePool (Variable);
937 return Status;
938 }
939
940 /**
941 Build the Boot#### or Driver#### option from the VariableName.
942
943 @param VariableName EFI Variable name indicate if it is Boot#### or Driver####
944 @param Option Return the Boot#### or Driver#### option.
945
946 @retval EFI_SUCCESS Get the option just been created
947 @retval EFI_NOT_FOUND Failed to get the new option
948 **/
949 EFI_STATUS
950 EFIAPI
951 EfiBootManagerVariableToLoadOption (
952 IN CHAR16 *VariableName,
953 IN OUT EFI_BOOT_MANAGER_LOAD_OPTION *Option
954 )
955 {
956 return EfiBootManagerVariableToLoadOptionEx (VariableName, &gEfiGlobalVariableGuid, Option);
957 }
958
959 typedef struct {
960 EFI_BOOT_MANAGER_LOAD_OPTION_TYPE OptionType;
961 EFI_GUID *Guid;
962 EFI_BOOT_MANAGER_LOAD_OPTION *Options;
963 UINTN OptionCount;
964 } BM_COLLECT_LOAD_OPTIONS_PARAM;
965
966 /**
967 Visitor function to collect the Platform Recovery load options or OS Recovery
968 load options from NV storage.
969
970 @param Name Variable name.
971 @param Guid Variable GUID.
972 @param Context The same context passed to BmForEachVariable.
973 **/
974 VOID
975 BmCollectLoadOptions (
976 IN CHAR16 *Name,
977 IN EFI_GUID *Guid,
978 IN VOID *Context
979 )
980 {
981 EFI_STATUS Status;
982 EFI_BOOT_MANAGER_LOAD_OPTION_TYPE OptionType;
983 UINT16 OptionNumber;
984 EFI_BOOT_MANAGER_LOAD_OPTION Option;
985 UINTN Index;
986 BM_COLLECT_LOAD_OPTIONS_PARAM *Param;
987
988 Param = (BM_COLLECT_LOAD_OPTIONS_PARAM *) Context;
989
990 if (CompareGuid (Guid, Param->Guid) && (
991 Param->OptionType == LoadOptionTypePlatformRecovery &&
992 EfiBootManagerIsValidLoadOptionVariableName (Name, &OptionType, &OptionNumber) &&
993 OptionType == LoadOptionTypePlatformRecovery
994 )) {
995 Status = EfiBootManagerVariableToLoadOptionEx (Name, Guid, &Option);
996 if (!EFI_ERROR (Status)) {
997 for (Index = 0; Index < Param->OptionCount; Index++) {
998 if (Param->Options[Index].OptionNumber > Option.OptionNumber) {
999 break;
1000 }
1001 }
1002 Param->Options = ReallocatePool (
1003 Param->OptionCount * sizeof (EFI_BOOT_MANAGER_LOAD_OPTION),
1004 (Param->OptionCount + 1) * sizeof (EFI_BOOT_MANAGER_LOAD_OPTION),
1005 Param->Options
1006 );
1007 ASSERT (Param->Options != NULL);
1008 CopyMem (&Param->Options[Index + 1], &Param->Options[Index], (Param->OptionCount - Index) * sizeof (EFI_BOOT_MANAGER_LOAD_OPTION));
1009 CopyMem (&Param->Options[Index], &Option, sizeof (EFI_BOOT_MANAGER_LOAD_OPTION));
1010 Param->OptionCount++;
1011 }
1012 }
1013 }
1014
1015 /**
1016 Returns an array of load options based on the EFI variable
1017 L"BootOrder"/L"DriverOrder" and the L"Boot####"/L"Driver####" variables impled by it.
1018 #### is the hex value of the UINT16 in each BootOrder/DriverOrder entry.
1019
1020 @param LoadOptionCount Returns number of entries in the array.
1021 @param LoadOptionType The type of the load option.
1022
1023 @retval NULL No load options exist.
1024 @retval !NULL Array of load option entries.
1025
1026 **/
1027 EFI_BOOT_MANAGER_LOAD_OPTION *
1028 EFIAPI
1029 EfiBootManagerGetLoadOptions (
1030 OUT UINTN *OptionCount,
1031 IN EFI_BOOT_MANAGER_LOAD_OPTION_TYPE LoadOptionType
1032 )
1033 {
1034 EFI_STATUS Status;
1035 UINT16 *OptionOrder;
1036 UINTN OptionOrderSize;
1037 UINTN Index;
1038 UINTN OptionIndex;
1039 EFI_BOOT_MANAGER_LOAD_OPTION *Options;
1040 CHAR16 OptionName[BM_OPTION_NAME_LEN];
1041 UINT16 OptionNumber;
1042 BM_COLLECT_LOAD_OPTIONS_PARAM Param;
1043
1044 *OptionCount = 0;
1045 Options = NULL;
1046
1047 if (LoadOptionType == LoadOptionTypeDriver || LoadOptionType == LoadOptionTypeSysPrep || LoadOptionType == LoadOptionTypeBoot) {
1048 //
1049 // Read the BootOrder, or DriverOrder variable.
1050 //
1051 GetEfiGlobalVariable2 (mBmLoadOptionOrderName[LoadOptionType], (VOID **) &OptionOrder, &OptionOrderSize);
1052 if (OptionOrder == NULL) {
1053 return NULL;
1054 }
1055
1056 *OptionCount = OptionOrderSize / sizeof (UINT16);
1057
1058 Options = AllocatePool (*OptionCount * sizeof (EFI_BOOT_MANAGER_LOAD_OPTION));
1059 ASSERT (Options != NULL);
1060
1061 OptionIndex = 0;
1062 for (Index = 0; Index < *OptionCount; Index++) {
1063 OptionNumber = OptionOrder[Index];
1064 UnicodeSPrint (OptionName, sizeof (OptionName), L"%s%04x", mBmLoadOptionName[LoadOptionType], OptionNumber);
1065
1066 Status = EfiBootManagerVariableToLoadOption (OptionName, &Options[OptionIndex]);
1067 if (EFI_ERROR (Status)) {
1068 DEBUG ((EFI_D_INFO, "[Bds] %s doesn't exist - Update ****Order variable to remove the reference!!", OptionName));
1069 EfiBootManagerDeleteLoadOptionVariable (OptionNumber, LoadOptionType);
1070 } else {
1071 ASSERT (Options[OptionIndex].OptionNumber == OptionNumber);
1072 OptionIndex++;
1073 }
1074 }
1075
1076 if (OptionOrder != NULL) {
1077 FreePool (OptionOrder);
1078 }
1079
1080 if (OptionIndex < *OptionCount) {
1081 Options = ReallocatePool (*OptionCount * sizeof (EFI_BOOT_MANAGER_LOAD_OPTION), OptionIndex * sizeof (EFI_BOOT_MANAGER_LOAD_OPTION), Options);
1082 ASSERT (Options != NULL);
1083 *OptionCount = OptionIndex;
1084 }
1085
1086 } else if (LoadOptionType == LoadOptionTypePlatformRecovery) {
1087 Param.OptionType = LoadOptionTypePlatformRecovery;
1088 Param.Options = NULL;
1089 Param.OptionCount = 0;
1090 Param.Guid = &gEfiGlobalVariableGuid;
1091
1092 BmForEachVariable (BmCollectLoadOptions, (VOID *) &Param);
1093
1094 *OptionCount = Param.OptionCount;
1095 Options = Param.Options;
1096 }
1097
1098 return Options;
1099 }
1100
1101 /**
1102 Free an EFI_BOOT_MANGER_LOAD_OPTION entry that was allocate by the library.
1103
1104 @param LoadOption Pointer to boot option to Free.
1105
1106 @return EFI_SUCCESS BootOption was freed
1107 @return EFI_NOT_FOUND BootOption == NULL
1108
1109 **/
1110 EFI_STATUS
1111 EFIAPI
1112 EfiBootManagerFreeLoadOption (
1113 IN EFI_BOOT_MANAGER_LOAD_OPTION *LoadOption
1114 )
1115 {
1116 if (LoadOption == NULL) {
1117 return EFI_NOT_FOUND;
1118 }
1119
1120 if (LoadOption->Description != NULL) {
1121 FreePool (LoadOption->Description);
1122 }
1123 if (LoadOption->FilePath != NULL) {
1124 FreePool (LoadOption->FilePath);
1125 }
1126 if (LoadOption->OptionalData != NULL) {
1127 FreePool (LoadOption->OptionalData);
1128 }
1129
1130 return EFI_SUCCESS;
1131 }
1132
1133 /**
1134 Free an EFI_BOOT_MANGER_LOAD_OPTION array that was allocated by
1135 EfiBootManagerGetLoadOptions().
1136
1137 @param Option Pointer to boot option array to free.
1138 @param OptionCount Number of array entries in BootOption
1139
1140 @return EFI_SUCCESS BootOption was freed
1141 @return EFI_NOT_FOUND BootOption == NULL
1142
1143 **/
1144 EFI_STATUS
1145 EFIAPI
1146 EfiBootManagerFreeLoadOptions (
1147 IN EFI_BOOT_MANAGER_LOAD_OPTION *Option,
1148 IN UINTN OptionCount
1149 )
1150 {
1151 UINTN Index;
1152
1153 if (Option == NULL) {
1154 return EFI_NOT_FOUND;
1155 }
1156
1157 for (Index = 0;Index < OptionCount; Index++) {
1158 EfiBootManagerFreeLoadOption (&Option[Index]);
1159 }
1160
1161 FreePool (Option);
1162
1163 return EFI_SUCCESS;
1164 }
1165
1166 /**
1167 Return whether the PE header of the load option is valid or not.
1168
1169 @param[in] Type The load option type.
1170 @param[in] FileBuffer The PE file buffer of the load option.
1171 @param[in] FileSize The size of the load option file.
1172
1173 @retval TRUE The PE header of the load option is valid.
1174 @retval FALSE The PE header of the load option is not valid.
1175 **/
1176 BOOLEAN
1177 BmIsLoadOptionPeHeaderValid (
1178 IN EFI_BOOT_MANAGER_LOAD_OPTION_TYPE Type,
1179 IN VOID *FileBuffer,
1180 IN UINTN FileSize
1181 )
1182 {
1183 EFI_IMAGE_DOS_HEADER *DosHeader;
1184 EFI_IMAGE_OPTIONAL_HEADER_UNION *PeHeader;
1185 EFI_IMAGE_OPTIONAL_HEADER32 *OptionalHeader;
1186 UINT16 Subsystem;
1187
1188 if (FileBuffer == NULL || FileSize == 0) {
1189 return FALSE;
1190 }
1191
1192 //
1193 // Read dos header
1194 //
1195 DosHeader = (EFI_IMAGE_DOS_HEADER *) FileBuffer;
1196 if (FileSize >= sizeof (EFI_IMAGE_DOS_HEADER) &&
1197 FileSize > DosHeader->e_lfanew && DosHeader->e_magic == EFI_IMAGE_DOS_SIGNATURE
1198 ) {
1199 //
1200 // Read and check PE signature
1201 //
1202 PeHeader = (EFI_IMAGE_OPTIONAL_HEADER_UNION *) ((UINT8 *) FileBuffer + DosHeader->e_lfanew);
1203 if (FileSize >= DosHeader->e_lfanew + sizeof (EFI_IMAGE_OPTIONAL_HEADER_UNION) &&
1204 PeHeader->Pe32.Signature == EFI_IMAGE_NT_SIGNATURE
1205 ) {
1206 //
1207 // Check PE32 or PE32+ magic, and machine type
1208 //
1209 OptionalHeader = (EFI_IMAGE_OPTIONAL_HEADER32 *) &PeHeader->Pe32.OptionalHeader;
1210 if ((OptionalHeader->Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC ||
1211 OptionalHeader->Magic == EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC) &&
1212 EFI_IMAGE_MACHINE_TYPE_SUPPORTED (PeHeader->Pe32.FileHeader.Machine)
1213 ) {
1214 //
1215 // Check the Subsystem:
1216 // Driver#### must be of type BootServiceDriver or RuntimeDriver
1217 // SysPrep####, Boot####, OsRecovery####, PlatformRecovery#### must be of type Application
1218 //
1219 Subsystem = OptionalHeader->Subsystem;
1220 if ((Type == LoadOptionTypeDriver && Subsystem == EFI_IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER) ||
1221 (Type == LoadOptionTypeDriver && Subsystem == EFI_IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER) ||
1222 (Type == LoadOptionTypeSysPrep && Subsystem == EFI_IMAGE_SUBSYSTEM_EFI_APPLICATION) ||
1223 (Type == LoadOptionTypeBoot && Subsystem == EFI_IMAGE_SUBSYSTEM_EFI_APPLICATION) ||
1224 (Type == LoadOptionTypePlatformRecovery && Subsystem == EFI_IMAGE_SUBSYSTEM_EFI_APPLICATION)
1225 ) {
1226 return TRUE;
1227 }
1228 }
1229 }
1230 }
1231
1232 return FALSE;
1233 }
1234
1235 /**
1236 Process (load and execute) the load option.
1237
1238 @param LoadOption Pointer to the load option.
1239
1240 @retval EFI_INVALID_PARAMETER The load option type is invalid,
1241 or the load option file path doesn't point to a valid file.
1242 @retval EFI_UNSUPPORTED The load option type is of LoadOptionTypeBoot.
1243 @retval EFI_SUCCESS The load option is inactive, or successfully loaded and executed.
1244 **/
1245 EFI_STATUS
1246 EFIAPI
1247 EfiBootManagerProcessLoadOption (
1248 IN EFI_BOOT_MANAGER_LOAD_OPTION *LoadOption
1249 )
1250 {
1251 EFI_STATUS Status;
1252 EFI_DEVICE_PATH_PROTOCOL *FilePath;
1253 EFI_HANDLE ImageHandle;
1254 EFI_LOADED_IMAGE_PROTOCOL *ImageInfo;
1255 VOID *FileBuffer;
1256 UINTN FileSize;
1257
1258 if ((UINT32) LoadOption->OptionType >= LoadOptionTypeMax) {
1259 return EFI_INVALID_PARAMETER;
1260 }
1261
1262 if (LoadOption->OptionType == LoadOptionTypeBoot) {
1263 return EFI_UNSUPPORTED;
1264 }
1265
1266 //
1267 // If a load option is not marked as LOAD_OPTION_ACTIVE,
1268 // the boot manager will not automatically load the option.
1269 //
1270 if ((LoadOption->Attributes & LOAD_OPTION_ACTIVE) == 0) {
1271 return EFI_SUCCESS;
1272 }
1273
1274 Status = EFI_INVALID_PARAMETER;
1275
1276 //
1277 // Load and start the load option.
1278 //
1279 DEBUG ((
1280 DEBUG_INFO | DEBUG_LOAD, "Process Load Option (%s%04x) ...\n",
1281 mBmLoadOptionName[LoadOption->OptionType], LoadOption->OptionNumber
1282 ));
1283 ImageHandle = NULL;
1284 FileBuffer = EfiBootManagerGetLoadOptionBuffer (LoadOption->FilePath, &FilePath, &FileSize);
1285 DEBUG_CODE (
1286 if (FileBuffer != NULL && CompareMem (LoadOption->FilePath, FilePath, GetDevicePathSize (FilePath)) != 0) {
1287 DEBUG ((EFI_D_INFO, "[Bds] DevicePath expand: "));
1288 BmPrintDp (LoadOption->FilePath);
1289 DEBUG ((EFI_D_INFO, " -> "));
1290 BmPrintDp (FilePath);
1291 DEBUG ((EFI_D_INFO, "\n"));
1292 }
1293 );
1294 if (BmIsLoadOptionPeHeaderValid (LoadOption->OptionType, FileBuffer, FileSize)) {
1295 Status = gBS->LoadImage (
1296 FALSE,
1297 gImageHandle,
1298 FilePath,
1299 FileBuffer,
1300 FileSize,
1301 &ImageHandle
1302 );
1303 }
1304 if (FilePath != NULL) {
1305 FreePool (FilePath);
1306 }
1307 if (FileBuffer != NULL) {
1308 FreePool (FileBuffer);
1309 }
1310
1311 if (!EFI_ERROR (Status)) {
1312 Status = gBS->HandleProtocol (ImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **) &ImageInfo);
1313 ASSERT_EFI_ERROR (Status);
1314
1315 ImageInfo->LoadOptionsSize = LoadOption->OptionalDataSize;
1316 ImageInfo->LoadOptions = LoadOption->OptionalData;
1317 //
1318 // Before calling the image, enable the Watchdog Timer for the 5-minute period
1319 //
1320 gBS->SetWatchdogTimer (5 * 60, 0, 0, NULL);
1321
1322 LoadOption->Status = gBS->StartImage (ImageHandle, &LoadOption->ExitDataSize, &LoadOption->ExitData);
1323 DEBUG ((
1324 DEBUG_INFO | DEBUG_LOAD, "Load Option (%s%04x) Return Status = %r\n",
1325 mBmLoadOptionName[LoadOption->OptionType], LoadOption->OptionNumber, LoadOption->Status
1326 ));
1327
1328 //
1329 // Clear the Watchdog Timer after the image returns
1330 //
1331 gBS->SetWatchdogTimer (0, 0, 0, NULL);
1332 }
1333
1334 return Status;
1335 }
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