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1c280088 | 1 | /** @file\r |
b75a165d | 2 | MDE DXE Services Library provides functions that simplify the development of DXE Drivers. \r |
84716614 | 3 | These functions help access data from sections of FFS files or from file path.\r |
1c280088 | 4 | \r |
19388d29 HT |
5 | Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>\r |
6 | This program and the accompanying materials\r | |
1c280088 | 7 | are licensed and made available under the terms and conditions of the BSD License\r |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
2fc59a00 | 9 | http://opensource.org/licenses/bsd-license.php.\r |
1c280088 | 10 | \r |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include <PiDxe.h>\r | |
17 | #include <Library/DebugLib.h>\r | |
18 | #include <Library/MemoryAllocationLib.h>\r | |
19 | #include <Library/UefiBootServicesTableLib.h>\r | |
84716614 LG |
20 | #include <Library/DevicePathLib.h>\r |
21 | #include <Library/UefiLib.h>\r | |
eb9dd4d0 | 22 | #include <Library/DxeServicesLib.h>\r |
1c280088 | 23 | #include <Protocol/FirmwareVolume2.h>\r |
24 | #include <Protocol/LoadedImage.h>\r | |
84716614 LG |
25 | #include <Protocol/LoadFile2.h>\r |
26 | #include <Protocol/LoadFile.h>\r | |
27 | #include <Protocol/SimpleFileSystem.h>\r | |
28 | #include <Guid/FileInfo.h>\r | |
1c280088 | 29 | \r |
30 | /**\r | |
166152e8 | 31 | Identify the device handle from which the Image is loaded from. As this device handle is passed to\r |
32 | GetSectionFromFv as the identifier for a Firmware Volume, an EFI_FIRMWARE_VOLUME2_PROTOCOL \r | |
33 | protocol instance should be located succesfully by calling gBS->HandleProtocol ().\r | |
1c280088 | 34 | \r |
166152e8 | 35 | This function locates the EFI_LOADED_IMAGE_PROTOCOL instance installed\r |
36 | on ImageHandle. It then returns EFI_LOADED_IMAGE_PROTOCOL.DeviceHandle.\r | |
37 | \r | |
38 | If ImageHandle is NULL, then ASSERT ();\r | |
39 | If failed to locate a EFI_LOADED_IMAGE_PROTOCOL on ImageHandle, then ASSERT ();\r | |
40 | \r | |
41 | @param ImageHandle The firmware allocated handle for UEFI image.\r | |
1c280088 | 42 | \r |
58380e9c | 43 | @retval EFI_HANDLE The device handle from which the Image is loaded from.\r |
1c280088 | 44 | \r |
45 | **/\r | |
166152e8 | 46 | EFI_HANDLE\r |
47 | InternalImageHandleToFvHandle (\r | |
48 | EFI_HANDLE ImageHandle\r | |
49 | )\r | |
50 | {\r | |
51 | EFI_STATUS Status;\r | |
52 | EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;\r | |
53 | \r | |
54 | ASSERT (ImageHandle != NULL);\r | |
55 | \r | |
56 | Status = gBS->HandleProtocol (\r | |
57 | (EFI_HANDLE *) ImageHandle,\r | |
58 | &gEfiLoadedImageProtocolGuid,\r | |
59 | (VOID **) &LoadedImage\r | |
60 | );\r | |
61 | \r | |
62 | ASSERT_EFI_ERROR (Status);\r | |
63 | \r | |
64 | return LoadedImage->DeviceHandle;\r | |
65 | \r | |
66 | }\r | |
67 | \r | |
68 | /**\r | |
b75a165d LG |
69 | Allocate and fill a buffer from a Firmware Section identified by a Firmware File GUID name, a Firmware \r |
70 | Section type and instance number from the specified Firmware Volume.\r | |
71 | \r | |
72 | This functions first locate the EFI_FIRMWARE_VOLUME2_PROTOCOL protocol instance on FvHandle in order to \r | |
73 | carry out the Firmware Volume read operation. The function then reads the Firmware Section found sepcifed \r | |
74 | by NameGuid, SectionType and SectionInstance. \r | |
75 | \r | |
76 | The details of this search order is defined in description of EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection () \r | |
77 | found in PI Specification.\r | |
78 | \r | |
79 | If SectionType is EFI_SECTION_TE, EFI_SECTION_TE is used as section type to start the search. If EFI_SECTION_TE section \r | |
80 | is not found, EFI_SECTION_PE32 will be used to try the search again. If no EFI_SECTION_PE32 section is found, EFI_NOT_FOUND \r | |
81 | is returned.\r | |
166152e8 | 82 | \r |
b75a165d LG |
83 | The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated \r |
84 | by this function. This function can be only called at TPL_NOTIFY and below.\r | |
166152e8 | 85 | \r |
b75a165d LG |
86 | If FvHandle is NULL, then ASSERT ();\r |
87 | If NameGuid is NULL, then ASSERT();\r | |
88 | If Buffer is NULL, then ASSERT();\r | |
89 | If Size is NULL, then ASSERT().\r | |
90 | \r | |
58380e9c | 91 | @param FvHandle The device handle that contains a instance of \r |
92 | EFI_FIRMWARE_VOLUME2_PROTOCOL instance.\r | |
b75a165d LG |
93 | @param NameGuid The GUID name of a Firmware File.\r |
94 | @param SectionType The Firmware Section type.\r | |
58380e9c | 95 | @param SectionInstance The instance number of Firmware Section to \r |
96 | read from starting from 0.\r | |
97 | @param Buffer On output, Buffer contains the the data read \r | |
98 | from the section in the Firmware File found.\r | |
b75a165d LG |
99 | @param Size On output, the size of Buffer.\r |
100 | \r | |
101 | @retval EFI_SUCCESS The image is found and data and size is returned.\r | |
58380e9c | 102 | @retval EFI_NOT_FOUND The image specified by NameGuid and SectionType \r |
103 | can't be found.\r | |
104 | @retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the \r | |
105 | output data buffer or complete the operations.\r | |
106 | @retval EFI_DEVICE_ERROR A hardware error occurs during reading from the \r | |
107 | Firmware Volume.\r | |
108 | @retval EFI_ACCESS_DENIED The firmware volume containing the searched \r | |
109 | Firmware File is configured to disallow reads.\r | |
166152e8 | 110 | \r |
f80b0830 | 111 | **/\r |
1c280088 | 112 | EFI_STATUS\r |
eb9dd4d0 | 113 | InternalGetSectionFromFv (\r |
166152e8 | 114 | IN EFI_HANDLE FvHandle,\r |
115 | IN CONST EFI_GUID *NameGuid,\r | |
116 | IN EFI_SECTION_TYPE SectionType,\r | |
ff197efb | 117 | IN UINTN SectionInstance,\r |
166152e8 | 118 | OUT VOID **Buffer,\r |
119 | OUT UINTN *Size\r | |
1c280088 | 120 | )\r |
121 | {\r | |
166152e8 | 122 | EFI_STATUS Status;\r |
123 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r | |
124 | UINT32 AuthenticationStatus;\r | |
125 | \r | |
8cf43dd7 | 126 | ASSERT (NameGuid != NULL);\r |
127 | ASSERT (Buffer != NULL);\r | |
128 | ASSERT (Size != NULL);\r | |
129 | \r | |
166152e8 | 130 | ASSERT (FvHandle != NULL);\r |
131 | \r | |
132 | Status = gBS->HandleProtocol (\r | |
133 | FvHandle,\r | |
134 | &gEfiFirmwareVolume2ProtocolGuid,\r | |
135 | (VOID **) &Fv\r | |
136 | );\r | |
137 | if (EFI_ERROR (Status)) {\r | |
7ca066f9 | 138 | return EFI_NOT_FOUND;\r |
166152e8 | 139 | }\r |
1c280088 | 140 | \r |
141 | //\r | |
142 | // Read desired section content in NameGuid file\r | |
143 | //\r | |
144 | *Buffer = NULL;\r | |
145 | *Size = 0;\r | |
146 | Status = Fv->ReadSection (\r | |
147 | Fv,\r | |
148 | NameGuid,\r | |
149 | SectionType,\r | |
ff197efb | 150 | SectionInstance,\r |
1c280088 | 151 | Buffer,\r |
152 | Size,\r | |
153 | &AuthenticationStatus\r | |
154 | );\r | |
155 | \r | |
156 | if (EFI_ERROR (Status) && (SectionType == EFI_SECTION_TE)) {\r | |
157 | //\r | |
166152e8 | 158 | // Try reading PE32 section, if the required section is TE type \r |
1c280088 | 159 | //\r |
160 | *Buffer = NULL;\r | |
161 | *Size = 0;\r | |
162 | Status = Fv->ReadSection (\r | |
163 | Fv,\r | |
164 | NameGuid,\r | |
165 | EFI_SECTION_PE32,\r | |
ff197efb | 166 | SectionInstance,\r |
1c280088 | 167 | Buffer,\r |
168 | Size,\r | |
169 | &AuthenticationStatus\r | |
170 | );\r | |
171 | }\r | |
172 | \r | |
1c280088 | 173 | return Status;\r |
174 | }\r | |
175 | \r | |
682cee4c LG |
176 | /**\r |
177 | Searches all the available firmware volumes and returns the first matching FFS section. \r | |
178 | \r | |
179 | This function searches all the firmware volumes for FFS files with FV file type specified by FileType\r | |
180 | The order that the firmware volumes is searched is not deterministic. For each available FV a search \r | |
181 | is made for FFS file of type FileType. If the FV contains more than one FFS file with the same FileType, \r | |
182 | the FileInstance instance will be the matched FFS file. For each FFS file found a search \r | |
183 | is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance instances \r | |
184 | of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer. \r | |
185 | Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size. \r | |
186 | It is the caller's responsibility to use FreePool() to free the allocated buffer. \r | |
187 | See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections \r | |
188 | are retrieved from an FFS file based on SectionType and SectionInstance.\r | |
189 | \r | |
190 | If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, \r | |
191 | the search will be retried with a section type of EFI_SECTION_PE32.\r | |
192 | This function must be called with a TPL <= TPL_NOTIFY.\r | |
193 | \r | |
194 | If Buffer is NULL, then ASSERT().\r | |
195 | If Size is NULL, then ASSERT().\r | |
196 | \r | |
58380e9c | 197 | @param FileType Indicates the FV file type to search for within all \r |
198 | available FVs.\r | |
199 | @param FileInstance Indicates which file instance within all available \r | |
200 | FVs specified by FileType.\r | |
682cee4c | 201 | FileInstance starts from zero.\r |
58380e9c | 202 | @param SectionType Indicates the FFS section type to search for \r |
203 | within the FFS file \r | |
682cee4c LG |
204 | specified by FileType with FileInstance.\r |
205 | @param SectionInstance Indicates which section instance within the FFS file \r | |
58380e9c | 206 | specified by FileType with FileInstance to retrieve. \r |
207 | SectionInstance starts from zero.\r | |
208 | @param Buffer On output, a pointer to a callee allocated buffer \r | |
209 | containing the FFS file section that was found.\r | |
210 | Is it the caller's responsibility to free this \r | |
211 | buffer using FreePool().\r | |
682cee4c LG |
212 | @param Size On output, a pointer to the size, in bytes, of Buffer.\r |
213 | \r | |
214 | @retval EFI_SUCCESS The specified FFS section was returned.\r | |
215 | @retval EFI_NOT_FOUND The specified FFS section could not be found.\r | |
58380e9c | 216 | @retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve \r |
217 | the matching FFS section.\r | |
218 | @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a \r | |
219 | device error.\r | |
220 | @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because \r | |
221 | the firmware volume that \r | |
682cee4c LG |
222 | contains the matching FFS section does not allow reads.\r |
223 | **/\r | |
224 | EFI_STATUS\r | |
225 | EFIAPI\r | |
226 | GetSectionFromAnyFvByFileType (\r | |
227 | IN EFI_FV_FILETYPE FileType,\r | |
228 | IN UINTN FileInstance,\r | |
229 | IN EFI_SECTION_TYPE SectionType,\r | |
230 | IN UINTN SectionInstance,\r | |
231 | OUT VOID **Buffer,\r | |
232 | OUT UINTN *Size\r | |
233 | )\r | |
234 | {\r | |
235 | EFI_STATUS Status;\r | |
236 | EFI_HANDLE *HandleBuffer;\r | |
237 | UINTN HandleCount;\r | |
238 | UINTN IndexFv;\r | |
239 | UINTN IndexFile;\r | |
240 | UINTN Key;\r | |
241 | EFI_GUID NameGuid;\r | |
242 | EFI_FV_FILE_ATTRIBUTES Attributes;\r | |
243 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r | |
244 | \r | |
245 | //\r | |
246 | // Locate all available FVs.\r | |
247 | //\r | |
248 | HandleBuffer = NULL;\r | |
249 | Status = gBS->LocateHandleBuffer (\r | |
250 | ByProtocol,\r | |
251 | &gEfiFirmwareVolume2ProtocolGuid,\r | |
252 | NULL,\r | |
253 | &HandleCount,\r | |
254 | &HandleBuffer\r | |
255 | );\r | |
256 | if (EFI_ERROR (Status)) {\r | |
257 | return Status;\r | |
258 | }\r | |
259 | \r | |
260 | //\r | |
261 | // Go through FVs one by one to find the required section data.\r | |
262 | //\r | |
263 | for (IndexFv = 0; IndexFv < HandleCount; IndexFv++) {\r | |
264 | Status = gBS->HandleProtocol (\r | |
265 | HandleBuffer[IndexFv],\r | |
266 | &gEfiFirmwareVolume2ProtocolGuid,\r | |
267 | (VOID **)&Fv\r | |
268 | );\r | |
269 | if (EFI_ERROR (Status)) {\r | |
270 | continue;\r | |
271 | }\r | |
272 | \r | |
273 | //\r | |
274 | // Use Firmware Volume 2 Protocol to search for a file of type FileType in all FVs.\r | |
275 | //\r | |
276 | IndexFile = FileInstance + 1;\r | |
277 | Key = 0;\r | |
278 | do {\r | |
279 | Status = Fv->GetNextFile (Fv, &Key, &FileType, &NameGuid, &Attributes, Size);\r | |
280 | if (EFI_ERROR (Status)) {\r | |
281 | break;\r | |
282 | }\r | |
283 | IndexFile --;\r | |
284 | } while (IndexFile > 0);\r | |
b0d803fe | 285 | \r |
682cee4c LG |
286 | //\r |
287 | // Fv File with the required FV file type is found.\r | |
288 | // Search the section file in the found FV file.\r | |
289 | //\r | |
290 | if (IndexFile == 0) {\r | |
291 | Status = InternalGetSectionFromFv (\r | |
292 | HandleBuffer[IndexFv], \r | |
293 | &NameGuid,\r | |
294 | SectionType,\r | |
295 | SectionInstance,\r | |
296 | Buffer,\r | |
297 | Size\r | |
298 | );\r | |
299 | \r | |
300 | if (!EFI_ERROR (Status)) {\r | |
301 | goto Done;\r | |
302 | }\r | |
303 | }\r | |
304 | }\r | |
305 | \r | |
306 | //\r | |
307 | // The required FFS section file is not found. \r | |
308 | //\r | |
309 | if (IndexFv == HandleCount) {\r | |
310 | Status = EFI_NOT_FOUND;\r | |
311 | }\r | |
312 | \r | |
313 | Done:\r | |
314 | if (HandleBuffer != NULL) { \r | |
116b142d | 315 | FreePool(HandleBuffer);\r |
682cee4c LG |
316 | }\r |
317 | \r | |
318 | return Status;\r | |
319 | }\r | |
b0d803fe | 320 | \r |
f80b0830 | 321 | /**\r |
b75a165d LG |
322 | Searches all the availables firmware volumes and returns the first matching FFS section. \r |
323 | \r | |
324 | This function searches all the firmware volumes for FFS files with an FFS filename specified by NameGuid. \r | |
325 | The order that the firmware volumes is searched is not deterministic. For each FFS file found a search \r | |
326 | is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance instances \r | |
327 | of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer. \r | |
328 | Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size. \r | |
329 | It is the caller's responsibility to use FreePool() to free the allocated buffer. \r | |
330 | See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections \r | |
331 | are retrieved from an FFS file based on SectionType and SectionInstance.\r | |
332 | \r | |
333 | If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, \r | |
334 | the search will be retried with a section type of EFI_SECTION_PE32.\r | |
335 | This function must be called with a TPL <= TPL_NOTIFY.\r | |
336 | \r | |
337 | If NameGuid is NULL, then ASSERT().\r | |
338 | If Buffer is NULL, then ASSERT().\r | |
ff197efb | 339 | If Size is NULL, then ASSERT().\r |
340 | \r | |
f80b0830 | 341 | \r |
58380e9c | 342 | @param NameGuid A pointer to to the FFS filename GUID to search for \r |
343 | within any of the firmware volumes in the platform. \r | |
344 | @param SectionType Indicates the FFS section type to search for within \r | |
345 | the FFS file specified by NameGuid.\r | |
346 | @param SectionInstance Indicates which section instance within the FFS file \r | |
347 | specified by NameGuid to retrieve.\r | |
348 | @param Buffer On output, a pointer to a callee allocated buffer \r | |
349 | containing the FFS file section that was found. \r | |
350 | Is it the caller's responsibility to free this buffer \r | |
351 | using FreePool().\r | |
b75a165d LG |
352 | @param Size On output, a pointer to the size, in bytes, of Buffer.\r |
353 | \r | |
354 | @retval EFI_SUCCESS The specified FFS section was returned.\r | |
355 | @retval EFI_NOT_FOUND The specified FFS section could not be found.\r | |
58380e9c | 356 | @retval EFI_OUT_OF_RESOURCES There are not enough resources available to \r |
357 | retrieve the matching FFS section.\r | |
358 | @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a \r | |
359 | device error.\r | |
360 | @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the \r | |
361 | firmware volume that \r | |
b75a165d | 362 | contains the matching FFS section does not allow reads.\r |
f80b0830 | 363 | **/\r |
b0d803fe | 364 | EFI_STATUS\r |
365 | EFIAPI\r | |
eb9dd4d0 | 366 | GetSectionFromAnyFv (\r |
b0d803fe | 367 | IN CONST EFI_GUID *NameGuid,\r |
368 | IN EFI_SECTION_TYPE SectionType,\r | |
ff197efb | 369 | IN UINTN SectionInstance,\r |
b0d803fe | 370 | OUT VOID **Buffer,\r |
371 | OUT UINTN *Size\r | |
372 | )\r | |
373 | {\r | |
374 | EFI_STATUS Status;\r | |
375 | EFI_HANDLE *HandleBuffer;\r | |
376 | UINTN HandleCount;\r | |
377 | UINTN Index;\r | |
378 | EFI_HANDLE FvHandle;\r | |
b0d803fe | 379 | \r |
380 | //\r | |
381 | // Search the FV that contain the caller's FFS first.\r | |
382 | // FV builder can choose to build FFS into the this FV\r | |
383 | // so that this implementation of GetSectionFromAnyFv\r | |
384 | // will locate the FFS faster.\r | |
385 | //\r | |
166152e8 | 386 | FvHandle = InternalImageHandleToFvHandle (gImageHandle);\r |
eb9dd4d0 | 387 | Status = InternalGetSectionFromFv (\r |
b0d803fe | 388 | FvHandle,\r |
389 | NameGuid,\r | |
390 | SectionType,\r | |
ff197efb | 391 | SectionInstance,\r |
b0d803fe | 392 | Buffer,\r |
393 | Size\r | |
394 | );\r | |
395 | if (!EFI_ERROR (Status)) {\r | |
396 | return EFI_SUCCESS;\r | |
397 | }\r | |
398 | \r | |
b0d803fe | 399 | HandleBuffer = NULL;\r |
400 | Status = gBS->LocateHandleBuffer (\r | |
401 | ByProtocol,\r | |
402 | &gEfiFirmwareVolume2ProtocolGuid,\r | |
403 | NULL,\r | |
404 | &HandleCount,\r | |
405 | &HandleBuffer\r | |
406 | );\r | |
407 | if (EFI_ERROR (Status)) {\r | |
408 | goto Done;\r | |
409 | }\r | |
410 | \r | |
ff197efb | 411 | for (Index = 0; Index < HandleCount; Index++) {\r |
b0d803fe | 412 | //\r |
413 | // Skip the FV that contain the caller's FFS\r | |
414 | //\r | |
ff197efb | 415 | if (HandleBuffer[Index] != FvHandle) {\r |
eb9dd4d0 | 416 | Status = InternalGetSectionFromFv (\r |
ff197efb | 417 | HandleBuffer[Index], \r |
418 | NameGuid, \r | |
419 | SectionType, \r | |
420 | SectionInstance,\r | |
421 | Buffer, \r | |
422 | Size\r | |
423 | );\r | |
424 | \r | |
425 | if (!EFI_ERROR (Status)) {\r | |
426 | goto Done;\r | |
427 | }\r | |
b0d803fe | 428 | }\r |
429 | \r | |
b0d803fe | 430 | }\r |
431 | \r | |
432 | if (Index == HandleCount) {\r | |
433 | Status = EFI_NOT_FOUND;\r | |
434 | }\r | |
435 | \r | |
436 | Done:\r | |
437 | \r | |
116b142d LG |
438 | if (HandleBuffer != NULL) { \r |
439 | FreePool(HandleBuffer);\r | |
b0d803fe | 440 | }\r |
441 | return Status;\r | |
442 | \r | |
443 | }\r | |
444 | \r | |
f80b0830 | 445 | /**\r |
b75a165d LG |
446 | Searches the firmware volume that the currently executing module was loaded from and returns the first matching FFS section. \r |
447 | \r | |
448 | This function searches the firmware volume that the currently executing module was loaded \r | |
449 | from for an FFS file with an FFS filename specified by NameGuid. If the FFS file is found a search \r | |
450 | is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance \r | |
451 | instances of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer.\r | |
452 | Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size. \r | |
453 | It is the caller's responsibility to use FreePool() to free the allocated buffer. \r | |
454 | See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections are retrieved from \r | |
455 | an FFS file based on SectionType and SectionInstance.\r | |
456 | \r | |
457 | If the currently executing module was not loaded from a firmware volume, then EFI_NOT_FOUND is returned.\r | |
458 | If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, \r | |
459 | the search will be retried with a section type of EFI_SECTION_PE32.\r | |
460 | \r | |
461 | This function must be called with a TPL <= TPL_NOTIFY.\r | |
462 | If NameGuid is NULL, then ASSERT().\r | |
463 | If Buffer is NULL, then ASSERT().\r | |
ff197efb | 464 | If Size is NULL, then ASSERT().\r |
465 | \r | |
58380e9c | 466 | @param NameGuid A pointer to to the FFS filename GUID to search for \r |
467 | within the firmware volumes that the currently \r | |
468 | executing module was loaded from.\r | |
469 | @param SectionType Indicates the FFS section type to search for within \r | |
470 | the FFS file specified by NameGuid.\r | |
471 | @param SectionInstance Indicates which section instance within the FFS file \r | |
472 | specified by NameGuid to retrieve.\r | |
473 | @param Buffer On output, a pointer to a callee allocated buffer \r | |
474 | containing the FFS file section that was found. \r | |
475 | Is it the caller's responsibility to free this buffer \r | |
476 | using FreePool().\r | |
b75a165d LG |
477 | @param Size On output, a pointer to the size, in bytes, of Buffer.\r |
478 | \r | |
479 | \r | |
480 | @retval EFI_SUCCESS The specified FFS section was returned.\r | |
481 | @retval EFI_NOT_FOUND The specified FFS section could not be found.\r | |
58380e9c | 482 | @retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve \r |
483 | the matching FFS section.\r | |
484 | @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a \r | |
485 | device error.\r | |
486 | @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the \r | |
487 | firmware volume that contains the matching FFS \r | |
488 | section does not allow reads. \r | |
f80b0830 | 489 | **/\r |
b0d803fe | 490 | EFI_STATUS\r |
491 | EFIAPI\r | |
eb9dd4d0 | 492 | GetSectionFromFv (\r |
b0d803fe | 493 | IN CONST EFI_GUID *NameGuid,\r |
494 | IN EFI_SECTION_TYPE SectionType,\r | |
ff197efb | 495 | IN UINTN SectionInstance,\r |
b0d803fe | 496 | OUT VOID **Buffer,\r |
497 | OUT UINTN *Size\r | |
498 | )\r | |
499 | {\r | |
eb9dd4d0 | 500 | return InternalGetSectionFromFv (\r |
501 | InternalImageHandleToFvHandle(gImageHandle),\r | |
502 | NameGuid,\r | |
503 | SectionType,\r | |
504 | SectionInstance,\r | |
505 | Buffer,\r | |
506 | Size\r | |
507 | );\r | |
b0d803fe | 508 | }\r |
509 | \r | |
510 | \r | |
f80b0830 | 511 | /**\r |
b75a165d LG |
512 | Searches the FFS file the the currently executing module was loaded from and returns the first matching FFS section.\r |
513 | \r | |
514 | This function searches the FFS file that the currently executing module was loaded from for a FFS sections of type SectionType.\r | |
515 | If the FFS file contains at least SectionInstance instances of the FFS section specified by SectionType, \r | |
516 | then the SectionInstance instance is returned in Buffer. Buffer is allocated using AllocatePool(), \r | |
517 | and the size of the allocated buffer is returned in Size. It is the caller's responsibility \r | |
518 | to use FreePool() to free the allocated buffer. See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for \r | |
519 | details on how sections are retrieved from an FFS file based on SectionType and SectionInstance.\r | |
520 | \r | |
521 | If the currently executing module was not loaded from an FFS file, then EFI_NOT_FOUND is returned.\r | |
522 | If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, \r | |
523 | the search will be retried with a section type of EFI_SECTION_PE32.\r | |
524 | This function must be called with a TPL <= TPL_NOTIFY.\r | |
525 | \r | |
526 | If Buffer is NULL, then ASSERT().\r | |
ff197efb | 527 | If Size is NULL, then ASSERT().\r |
528 | \r | |
b75a165d | 529 | \r |
58380e9c | 530 | @param SectionType Indicates the FFS section type to search for within \r |
531 | the FFS file that the currently executing module \r | |
532 | was loaded from.\r | |
533 | @param SectionInstance Indicates which section instance to retrieve within \r | |
534 | the FFS file that the currently executing module \r | |
535 | was loaded from.\r | |
536 | @param Buffer On output, a pointer to a callee allocated buffer \r | |
537 | containing the FFS file section that was found. \r | |
538 | Is it the caller's responsibility to free this buffer \r | |
539 | using FreePool().\r | |
b75a165d LG |
540 | @param Size On output, a pointer to the size, in bytes, of Buffer.\r |
541 | \r | |
542 | @retval EFI_SUCCESS The specified FFS section was returned.\r | |
543 | @retval EFI_NOT_FOUND The specified FFS section could not be found.\r | |
58380e9c | 544 | @retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve \r |
545 | the matching FFS section.\r | |
546 | @retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a \r | |
547 | device error.\r | |
548 | @retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the \r | |
549 | firmware volume that contains the matching FFS \r | |
550 | section does not allow reads. \r | |
f80b0830 | 551 | \r |
552 | **/\r | |
b0d803fe | 553 | EFI_STATUS\r |
554 | EFIAPI\r | |
eb9dd4d0 | 555 | GetSectionFromFfs (\r |
b0d803fe | 556 | IN EFI_SECTION_TYPE SectionType,\r |
ff197efb | 557 | IN UINTN SectionInstance,\r |
b0d803fe | 558 | OUT VOID **Buffer,\r |
559 | OUT UINTN *Size\r | |
560 | )\r | |
561 | {\r | |
eb9dd4d0 | 562 | return InternalGetSectionFromFv(\r |
563 | InternalImageHandleToFvHandle(gImageHandle),\r | |
564 | &gEfiCallerIdGuid,\r | |
565 | SectionType,\r | |
566 | SectionInstance,\r | |
567 | Buffer,\r | |
568 | Size\r | |
569 | );\r | |
b0d803fe | 570 | }\r |
571 | \r | |
84716614 LG |
572 | \r |
573 | /**\r | |
574 | Get the image file buffer data and buffer size by its device path. \r | |
575 | \r | |
ea6898b9 | 576 | Access the file either from a firmware volume, from a file system interface, \r |
84716614 LG |
577 | or from the load file interface.\r |
578 | \r | |
579 | Allocate memory to store the found image. The caller is responsible to free memory.\r | |
580 | \r | |
581 | If File is NULL, then NULL is returned.\r | |
582 | If FileSize is NULL, then NULL is returned.\r | |
583 | If AuthenticationStatus is NULL, then NULL is returned.\r | |
584 | \r | |
58380e9c | 585 | @param[in] BootPolicy Policy for Open Image File.If TRUE, indicates \r |
586 | that the request originates from the boot \r | |
587 | manager, and that the boot manager is\r | |
588 | attempting to load FilePath as a boot\r | |
589 | selection. If FALSE, then FilePath must \r | |
590 | match an exact file to be loaded.\r | |
591 | @param[in] FilePath The pointer to the device path of the file\r | |
592 | that is absracted to the file buffer.\r | |
593 | @param[out] FileSize The pointer to the size of the abstracted \r | |
594 | file buffer.\r | |
595 | @param[out] AuthenticationStatus The pointer to a caller-allocated UINT32 \r | |
596 | in which the authentication status is returned.\r | |
597 | \r | |
598 | @retval NULL File is NULL, or FileSize is NULL. Or, the file can't be found.\r | |
84716614 LG |
599 | @retval other The abstracted file buffer. The caller is responsible to free memory.\r |
600 | **/\r | |
601 | VOID *\r | |
602 | EFIAPI\r | |
603 | GetFileBufferByFilePath (\r | |
604 | IN BOOLEAN BootPolicy,\r | |
605 | IN CONST EFI_DEVICE_PATH_PROTOCOL *FilePath,\r | |
606 | OUT UINTN *FileSize,\r | |
607 | OUT UINT32 *AuthenticationStatus\r | |
608 | )\r | |
609 | {\r | |
610 | EFI_DEVICE_PATH_PROTOCOL *DevicePathNode;\r | |
611 | EFI_DEVICE_PATH_PROTOCOL *OrigDevicePathNode;\r | |
95dd343a | 612 | EFI_DEVICE_PATH_PROTOCOL *TempDevicePathNode;\r |
84716614 LG |
613 | EFI_HANDLE Handle;\r |
614 | EFI_GUID *FvNameGuid;\r | |
615 | EFI_FIRMWARE_VOLUME2_PROTOCOL *FwVol;\r | |
616 | EFI_SECTION_TYPE SectionType;\r | |
617 | UINT8 *ImageBuffer;\r | |
618 | UINTN ImageBufferSize;\r | |
619 | EFI_FV_FILETYPE Type;\r | |
620 | EFI_FV_FILE_ATTRIBUTES Attrib;\r | |
621 | EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Volume;\r | |
622 | EFI_FILE_HANDLE FileHandle;\r | |
623 | EFI_FILE_HANDLE LastHandle;\r | |
624 | EFI_FILE_INFO *FileInfo;\r | |
625 | UINTN FileInfoSize;\r | |
626 | EFI_LOAD_FILE_PROTOCOL *LoadFile;\r | |
627 | EFI_LOAD_FILE2_PROTOCOL *LoadFile2;\r | |
628 | EFI_STATUS Status;\r | |
629 | \r | |
630 | //\r | |
631 | // Check input File device path.\r | |
632 | //\r | |
633 | if (FilePath == NULL || FileSize == NULL || AuthenticationStatus == NULL) {\r | |
634 | return NULL;\r | |
635 | }\r | |
636 | \r | |
637 | //\r | |
638 | // Init local variable\r | |
639 | //\r | |
95dd343a | 640 | TempDevicePathNode = NULL;\r |
84716614 LG |
641 | FvNameGuid = NULL;\r |
642 | FileInfo = NULL;\r | |
643 | FileHandle = NULL;\r | |
644 | ImageBuffer = NULL;\r | |
645 | ImageBufferSize = 0;\r | |
646 | *AuthenticationStatus = 0;\r | |
647 | \r | |
648 | //\r | |
649 | // Copy File Device Path\r | |
650 | //\r | |
651 | OrigDevicePathNode = DuplicateDevicePath (FilePath);\r | |
652 | if (OrigDevicePathNode == NULL) {\r | |
653 | return NULL;\r | |
654 | }\r | |
655 | \r | |
656 | //\r | |
657 | // Check whether this device path support FV2 protocol.\r | |
658 | // Is so, this device path may contain a Image.\r | |
659 | //\r | |
660 | DevicePathNode = OrigDevicePathNode;\r | |
661 | Status = gBS->LocateDevicePath (&gEfiFirmwareVolume2ProtocolGuid, &DevicePathNode, &Handle);\r | |
662 | if (!EFI_ERROR (Status)) {\r | |
663 | //\r | |
664 | // For FwVol File system there is only a single file name that is a GUID.\r | |
665 | //\r | |
666 | FvNameGuid = EfiGetNameGuidFromFwVolDevicePathNode ((CONST MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) DevicePathNode);\r | |
667 | if (FvNameGuid == NULL) {\r | |
668 | Status = EFI_INVALID_PARAMETER;\r | |
669 | } else {\r | |
670 | //\r | |
671 | // Read image from the firmware file\r | |
672 | //\r | |
673 | Status = gBS->HandleProtocol (Handle, &gEfiFirmwareVolume2ProtocolGuid, (VOID**)&FwVol);\r | |
674 | if (!EFI_ERROR (Status)) {\r | |
675 | SectionType = EFI_SECTION_PE32;\r | |
676 | ImageBuffer = NULL;\r | |
677 | Status = FwVol->ReadSection (\r | |
678 | FwVol,\r | |
679 | FvNameGuid,\r | |
680 | SectionType,\r | |
681 | 0,\r | |
682 | (VOID **)&ImageBuffer,\r | |
683 | &ImageBufferSize,\r | |
684 | AuthenticationStatus\r | |
685 | );\r | |
686 | if (EFI_ERROR (Status)) {\r | |
687 | //\r | |
688 | // Try a raw file, since a PE32 SECTION does not exist\r | |
689 | //\r | |
690 | if (ImageBuffer != NULL) {\r | |
691 | FreePool (ImageBuffer);\r | |
692 | *AuthenticationStatus = 0;\r | |
693 | }\r | |
694 | ImageBuffer = NULL;\r | |
695 | Status = FwVol->ReadFile (\r | |
696 | FwVol,\r | |
697 | FvNameGuid,\r | |
698 | (VOID **)&ImageBuffer,\r | |
699 | &ImageBufferSize,\r | |
700 | &Type,\r | |
701 | &Attrib,\r | |
702 | AuthenticationStatus\r | |
703 | );\r | |
704 | }\r | |
705 | }\r | |
706 | }\r | |
c119933d | 707 | if (!EFI_ERROR (Status)) {\r |
708 | goto Finish;\r | |
709 | }\r | |
84716614 LG |
710 | }\r |
711 | \r | |
712 | //\r | |
713 | // Attempt to access the file via a file system interface\r | |
714 | //\r | |
715 | DevicePathNode = OrigDevicePathNode;\r | |
716 | Status = gBS->LocateDevicePath (&gEfiSimpleFileSystemProtocolGuid, &DevicePathNode, &Handle);\r | |
717 | if (!EFI_ERROR (Status)) {\r | |
718 | Status = gBS->HandleProtocol (Handle, &gEfiSimpleFileSystemProtocolGuid, (VOID**)&Volume);\r | |
719 | if (!EFI_ERROR (Status)) {\r | |
720 | //\r | |
721 | // Open the Volume to get the File System handle\r | |
722 | //\r | |
723 | Status = Volume->OpenVolume (Volume, &FileHandle);\r | |
724 | if (!EFI_ERROR (Status)) {\r | |
95dd343a LG |
725 | //\r |
726 | // Duplicate the device path to avoid the access to unaligned device path node.\r | |
727 | // Because the device path consists of one or more FILE PATH MEDIA DEVICE PATH\r | |
728 | // nodes, It assures the fields in device path nodes are 2 byte aligned.\r | |
729 | //\r | |
730 | TempDevicePathNode = DuplicateDevicePath (DevicePathNode);\r | |
731 | if (TempDevicePathNode == NULL) {\r | |
732 | FileHandle->Close (FileHandle);\r | |
c119933d | 733 | //\r |
734 | // Setting Status to an EFI_ERROR value will cause the rest of\r | |
735 | // the file system support below to be skipped.\r | |
736 | //\r | |
95dd343a | 737 | Status = EFI_OUT_OF_RESOURCES;\r |
95dd343a | 738 | }\r |
84716614 LG |
739 | //\r |
740 | // Parse each MEDIA_FILEPATH_DP node. There may be more than one, since the\r | |
741 | // directory information and filename can be seperate. The goal is to inch\r | |
742 | // our way down each device path node and close the previous node\r | |
743 | //\r | |
95dd343a | 744 | DevicePathNode = TempDevicePathNode;\r |
c119933d | 745 | while (!EFI_ERROR (Status) && !IsDevicePathEnd (DevicePathNode)) {\r |
84716614 LG |
746 | if (DevicePathType (DevicePathNode) != MEDIA_DEVICE_PATH ||\r |
747 | DevicePathSubType (DevicePathNode) != MEDIA_FILEPATH_DP) {\r | |
748 | Status = EFI_UNSUPPORTED;\r | |
749 | break;\r | |
750 | }\r | |
751 | \r | |
752 | LastHandle = FileHandle;\r | |
753 | FileHandle = NULL;\r | |
754 | \r | |
755 | Status = LastHandle->Open (\r | |
756 | LastHandle,\r | |
757 | &FileHandle,\r | |
758 | ((FILEPATH_DEVICE_PATH *) DevicePathNode)->PathName,\r | |
759 | EFI_FILE_MODE_READ,\r | |
760 | 0\r | |
761 | );\r | |
762 | \r | |
763 | //\r | |
764 | // Close the previous node\r | |
765 | //\r | |
766 | LastHandle->Close (LastHandle);\r | |
767 | \r | |
768 | DevicePathNode = NextDevicePathNode (DevicePathNode);\r | |
769 | }\r | |
770 | \r | |
771 | if (!EFI_ERROR (Status)) {\r | |
772 | //\r | |
773 | // We have found the file. Now we need to read it. Before we can read the file we need to\r | |
774 | // figure out how big the file is.\r | |
775 | //\r | |
776 | FileInfo = NULL;\r | |
777 | FileInfoSize = 0;\r | |
778 | Status = FileHandle->GetInfo (\r | |
779 | FileHandle,\r | |
780 | &gEfiFileInfoGuid,\r | |
781 | &FileInfoSize,\r | |
782 | FileInfo\r | |
783 | );\r | |
784 | \r | |
785 | if (Status == EFI_BUFFER_TOO_SMALL) {\r | |
786 | FileInfo = AllocatePool (FileInfoSize);\r | |
787 | if (FileInfo == NULL) {\r | |
788 | Status = EFI_OUT_OF_RESOURCES;\r | |
789 | } else {\r | |
790 | Status = FileHandle->GetInfo (\r | |
791 | FileHandle,\r | |
792 | &gEfiFileInfoGuid,\r | |
793 | &FileInfoSize,\r | |
794 | FileInfo\r | |
795 | );\r | |
796 | }\r | |
797 | }\r | |
798 | \r | |
e191bb14 | 799 | if (!EFI_ERROR (Status) && (FileInfo != NULL)) {\r |
84716614 LG |
800 | //\r |
801 | // Allocate space for the file\r | |
802 | //\r | |
803 | ImageBuffer = AllocatePool ((UINTN)FileInfo->FileSize);\r | |
804 | if (ImageBuffer == NULL) {\r | |
805 | Status = EFI_OUT_OF_RESOURCES;\r | |
806 | } else {\r | |
807 | //\r | |
808 | // Read the file into the buffer we allocated\r | |
809 | //\r | |
810 | ImageBufferSize = (UINTN)FileInfo->FileSize;\r | |
811 | Status = FileHandle->Read (FileHandle, &ImageBufferSize, ImageBuffer);\r | |
812 | }\r | |
813 | }\r | |
814 | }\r | |
815 | //\r | |
95dd343a | 816 | // Close the file and Free FileInfo and TempDevicePathNode since we are done\r |
84716614 LG |
817 | // \r |
818 | if (FileInfo != NULL) {\r | |
819 | FreePool (FileInfo);\r | |
820 | }\r | |
821 | if (FileHandle != NULL) {\r | |
822 | FileHandle->Close (FileHandle);\r | |
823 | }\r | |
c119933d | 824 | if (TempDevicePathNode != NULL) {\r |
825 | FreePool (TempDevicePathNode);\r | |
826 | }\r | |
84716614 LG |
827 | }\r |
828 | }\r | |
c119933d | 829 | if (!EFI_ERROR (Status)) {\r |
830 | goto Finish;\r | |
831 | }\r | |
84716614 LG |
832 | }\r |
833 | \r | |
834 | //\r | |
835 | // Attempt to access the file via LoadFile2 interface\r | |
836 | //\r | |
837 | if (!BootPolicy) {\r | |
838 | DevicePathNode = OrigDevicePathNode;\r | |
839 | Status = gBS->LocateDevicePath (&gEfiLoadFile2ProtocolGuid, &DevicePathNode, &Handle);\r | |
840 | if (!EFI_ERROR (Status)) {\r | |
841 | Status = gBS->HandleProtocol (Handle, &gEfiLoadFile2ProtocolGuid, (VOID**)&LoadFile2);\r | |
842 | if (!EFI_ERROR (Status)) {\r | |
843 | //\r | |
844 | // Call LoadFile2 with the correct buffer size\r | |
845 | //\r | |
846 | ImageBufferSize = 0;\r | |
847 | ImageBuffer = NULL;\r | |
848 | Status = LoadFile2->LoadFile (\r | |
849 | LoadFile2,\r | |
850 | DevicePathNode,\r | |
851 | FALSE,\r | |
852 | &ImageBufferSize,\r | |
853 | ImageBuffer\r | |
854 | );\r | |
855 | if (Status == EFI_BUFFER_TOO_SMALL) {\r | |
856 | ImageBuffer = AllocatePool (ImageBufferSize);\r | |
857 | if (ImageBuffer == NULL) {\r | |
858 | Status = EFI_OUT_OF_RESOURCES;\r | |
859 | } else {\r | |
860 | Status = LoadFile2->LoadFile (\r | |
861 | LoadFile2,\r | |
862 | DevicePathNode,\r | |
c083f7ca | 863 | FALSE,\r |
84716614 LG |
864 | &ImageBufferSize,\r |
865 | ImageBuffer\r | |
866 | );\r | |
867 | }\r | |
868 | }\r | |
869 | }\r | |
c119933d | 870 | if (!EFI_ERROR (Status)) {\r |
871 | goto Finish;\r | |
872 | }\r | |
84716614 LG |
873 | }\r |
874 | }\r | |
875 | \r | |
876 | //\r | |
877 | // Attempt to access the file via LoadFile interface\r | |
878 | //\r | |
879 | DevicePathNode = OrigDevicePathNode;\r | |
880 | Status = gBS->LocateDevicePath (&gEfiLoadFileProtocolGuid, &DevicePathNode, &Handle);\r | |
881 | if (!EFI_ERROR (Status)) {\r | |
882 | Status = gBS->HandleProtocol (Handle, &gEfiLoadFileProtocolGuid, (VOID**)&LoadFile);\r | |
883 | if (!EFI_ERROR (Status)) {\r | |
884 | //\r | |
885 | // Call LoadFile with the correct buffer size\r | |
886 | //\r | |
887 | ImageBufferSize = 0;\r | |
888 | ImageBuffer = NULL;\r | |
889 | Status = LoadFile->LoadFile (\r | |
890 | LoadFile,\r | |
891 | DevicePathNode,\r | |
892 | BootPolicy,\r | |
893 | &ImageBufferSize,\r | |
894 | ImageBuffer\r | |
895 | );\r | |
896 | if (Status == EFI_BUFFER_TOO_SMALL) {\r | |
897 | ImageBuffer = AllocatePool (ImageBufferSize);\r | |
898 | if (ImageBuffer == NULL) {\r | |
899 | Status = EFI_OUT_OF_RESOURCES;\r | |
900 | } else {\r | |
901 | Status = LoadFile->LoadFile (\r | |
902 | LoadFile,\r | |
903 | DevicePathNode,\r | |
904 | BootPolicy,\r | |
905 | &ImageBufferSize,\r | |
906 | ImageBuffer\r | |
907 | );\r | |
908 | }\r | |
909 | }\r | |
910 | }\r | |
911 | }\r | |
912 | \r | |
913 | Finish:\r | |
914 | \r | |
915 | if (EFI_ERROR (Status)) {\r | |
916 | if (ImageBuffer != NULL) {\r | |
917 | FreePool (ImageBuffer);\r | |
918 | ImageBuffer = NULL;\r | |
919 | }\r | |
920 | *FileSize = 0;\r | |
921 | } else {\r | |
922 | *FileSize = ImageBufferSize;\r | |
923 | }\r | |
924 | \r | |
925 | FreePool (OrigDevicePathNode);\r | |
926 | \r | |
927 | return ImageBuffer;\r | |
928 | }\r |