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b9d5a7f1 LG |
1 | /** @file\r |
2 | Provide generic extract guided section functions.\r | |
3 | \r | |
30f001ca | 4 | Copyright (c) 2007 - 2011, Intel Corporation. All rights reserved.<BR>\r |
b9d5a7f1 LG |
5 | This program and the accompanying materials\r |
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 | |
35a17154 | 8 | http://opensource.org/licenses/bsd-license.php.\r |
b9d5a7f1 LG |
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 | |
13 | **/\r | |
14 | \r | |
15 | #include <PiPei.h>\r | |
16 | \r | |
17 | #include <Library/DebugLib.h>\r | |
18 | #include <Library/PcdLib.h>\r | |
19 | #include <Library/BaseMemoryLib.h>\r | |
20 | #include <Library/ExtractGuidedSectionLib.h>\r | |
21 | \r | |
22 | #define EXTRACT_HANDLER_INFO_SIGNATURE SIGNATURE_32 ('E', 'G', 'S', 'I')\r | |
23 | \r | |
24 | typedef struct {\r | |
25 | UINT32 Signature;\r | |
26 | UINT32 NumberOfExtractHandler;\r | |
27 | GUID *ExtractHandlerGuidTable;\r | |
28 | EXTRACT_GUIDED_SECTION_DECODE_HANDLER *ExtractDecodeHandlerTable;\r | |
29 | EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *ExtractGetInfoHandlerTable;\r | |
30 | } EXTRACT_GUIDED_SECTION_HANDLER_INFO;\r | |
31 | \r | |
32 | /**\r | |
33 | HandlerInfo table address is set by PcdGuidedExtractHandlerTableAddress, which is used to store \r | |
34 | the registered guid and Handler list. When it is initialized, it will be directly returned. \r | |
35 | Or, HandlerInfo table will be initialized in this function.\r | |
36 | \r | |
58380e9c | 37 | @param[in, out] InfoPointer The pointer to the handler information structure.\r |
b9d5a7f1 LG |
38 | \r |
39 | @retval RETURN_SUCCESS HandlerInfo table can be used to store guid and function tables.\r | |
40 | @retval RETURN_OUT_OF_RESOURCES HandlerInfo table address is not writable.\r | |
41 | **/\r | |
42 | RETURN_STATUS\r | |
43 | GetExtractGuidedSectionHandlerInfo (\r | |
44 | IN OUT EXTRACT_GUIDED_SECTION_HANDLER_INFO **InfoPointer\r | |
45 | )\r | |
46 | {\r | |
47 | EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;\r | |
48 | \r | |
49 | //\r | |
50 | // Set the available memory address to handler info.\r | |
51 | //\r | |
52 | HandlerInfo = (EXTRACT_GUIDED_SECTION_HANDLER_INFO*)(VOID*)(UINTN) PcdGet64 (PcdGuidedExtractHandlerTableAddress);\r | |
3dbef428 ED |
53 | if (HandlerInfo == NULL) {\r |
54 | *InfoPointer = NULL;\r | |
55 | return EFI_OUT_OF_RESOURCES;\r | |
56 | }\r | |
b9d5a7f1 LG |
57 | \r |
58 | //\r | |
58380e9c | 59 | // First check whether the handler information structure is initialized.\r |
b9d5a7f1 LG |
60 | //\r |
61 | if (HandlerInfo->Signature == EXTRACT_HANDLER_INFO_SIGNATURE) {\r | |
62 | //\r | |
58380e9c | 63 | // The handler information has been initialized and is returned.\r |
b9d5a7f1 LG |
64 | //\r |
65 | *InfoPointer = HandlerInfo;\r | |
66 | return RETURN_SUCCESS;\r | |
67 | }\r | |
68 | \r | |
69 | //\r | |
58380e9c | 70 | // Try to initialize the handler information structure\r |
b9d5a7f1 LG |
71 | //\r |
72 | HandlerInfo->Signature = EXTRACT_HANDLER_INFO_SIGNATURE;\r | |
73 | if (HandlerInfo->Signature != EXTRACT_HANDLER_INFO_SIGNATURE) {\r | |
74 | //\r | |
58380e9c | 75 | // The handler information structure was not writeable because the memory is not ready.\r |
b9d5a7f1 LG |
76 | //\r |
77 | *InfoPointer = NULL;\r | |
78 | return RETURN_OUT_OF_RESOURCES;\r | |
79 | }\r | |
80 | \r | |
81 | //\r | |
82 | // Init HandlerInfo structure\r | |
83 | //\r | |
84 | HandlerInfo->NumberOfExtractHandler = 0;\r | |
85 | HandlerInfo->ExtractHandlerGuidTable = (GUID *) (HandlerInfo + 1);\r | |
86 | HandlerInfo->ExtractDecodeHandlerTable = (EXTRACT_GUIDED_SECTION_DECODE_HANDLER *) (\r | |
87 | (UINT8 *)HandlerInfo->ExtractHandlerGuidTable + \r | |
88 | PcdGet32 (PcdMaximumGuidedExtractHandler) * sizeof (GUID)\r | |
89 | );\r | |
90 | HandlerInfo->ExtractGetInfoHandlerTable = (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *) (\r | |
91 | (UINT8 *)HandlerInfo->ExtractDecodeHandlerTable + \r | |
92 | PcdGet32 (PcdMaximumGuidedExtractHandler) * \r | |
93 | sizeof (EXTRACT_GUIDED_SECTION_DECODE_HANDLER)\r | |
94 | );\r | |
95 | *InfoPointer = HandlerInfo;\r | |
96 | return RETURN_SUCCESS;\r | |
97 | }\r | |
98 | \r | |
99 | /**\r | |
100 | Retrieve the list GUIDs that have been registered through ExtractGuidedSectionRegisterHandlers().\r | |
101 | \r | |
102 | Sets ExtractHandlerGuidTable so it points at a callee allocated array of registered GUIDs.\r | |
103 | The total number of GUIDs in the array are returned. Since the array of GUIDs is callee allocated\r | |
104 | and caller must treat this array of GUIDs as read-only data. \r | |
105 | If ExtractHandlerGuidTable is NULL, then ASSERT().\r | |
106 | \r | |
107 | @param[out] ExtractHandlerGuidTable A pointer to the array of GUIDs that have been registered through\r | |
108 | ExtractGuidedSectionRegisterHandlers().\r | |
109 | \r | |
35a17154 | 110 | @return The number of the supported extract guided Handler.\r |
b9d5a7f1 LG |
111 | \r |
112 | **/\r | |
113 | UINTN\r | |
114 | EFIAPI\r | |
115 | ExtractGuidedSectionGetGuidList (\r | |
116 | OUT GUID **ExtractHandlerGuidTable\r | |
117 | )\r | |
118 | {\r | |
119 | RETURN_STATUS Status;\r | |
120 | EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;\r | |
121 | \r | |
122 | ASSERT (ExtractHandlerGuidTable != NULL);\r | |
123 | \r | |
124 | //\r | |
125 | // Get all registered handler information\r | |
126 | //\r | |
127 | Status = GetExtractGuidedSectionHandlerInfo (&HandlerInfo);\r | |
128 | if (RETURN_ERROR (Status)) {\r | |
129 | *ExtractHandlerGuidTable = NULL;\r | |
130 | return 0;\r | |
131 | }\r | |
132 | \r | |
133 | //\r | |
134 | // Get GuidTable and Table Number\r | |
135 | //\r | |
3dbef428 | 136 | ASSERT (HandlerInfo != NULL);\r |
b9d5a7f1 LG |
137 | *ExtractHandlerGuidTable = HandlerInfo->ExtractHandlerGuidTable;\r |
138 | return HandlerInfo->NumberOfExtractHandler;\r | |
139 | }\r | |
140 | \r | |
141 | /**\r | |
142 | Registers handlers of type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER and EXTRACT_GUIDED_SECTION_DECODE_HANDLER\r | |
143 | for a specific GUID section type.\r | |
144 | \r | |
145 | Registers the handlers specified by GetInfoHandler and DecodeHandler with the GUID specified by SectionGuid.\r | |
146 | If the GUID value specified by SectionGuid has already been registered, then return RETURN_ALREADY_STARTED.\r | |
147 | If there are not enough resources available to register the handlers then RETURN_OUT_OF_RESOURCES is returned.\r | |
148 | \r | |
149 | If SectionGuid is NULL, then ASSERT().\r | |
150 | If GetInfoHandler is NULL, then ASSERT().\r | |
151 | If DecodeHandler is NULL, then ASSERT().\r | |
152 | \r | |
153 | @param[in] SectionGuid A pointer to the GUID associated with the the handlers\r | |
154 | of the GUIDed section type being registered.\r | |
2fc59a00 | 155 | @param[in] GetInfoHandler The pointer to a function that examines a GUIDed section and returns the\r |
b9d5a7f1 LG |
156 | size of the decoded buffer and the size of an optional scratch buffer\r |
157 | required to actually decode the data in a GUIDed section.\r | |
2fc59a00 | 158 | @param[in] DecodeHandler The pointer to a function that decodes a GUIDed section into a caller\r |
b9d5a7f1 LG |
159 | allocated output buffer. \r |
160 | \r | |
161 | @retval RETURN_SUCCESS The handlers were registered.\r | |
162 | @retval RETURN_OUT_OF_RESOURCES There are not enough resources available to register the handlers.\r | |
163 | \r | |
164 | **/\r | |
165 | RETURN_STATUS\r | |
166 | EFIAPI\r | |
167 | ExtractGuidedSectionRegisterHandlers (\r | |
168 | IN CONST GUID *SectionGuid,\r | |
169 | IN EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER GetInfoHandler,\r | |
170 | IN EXTRACT_GUIDED_SECTION_DECODE_HANDLER DecodeHandler\r | |
171 | )\r | |
172 | {\r | |
173 | UINT32 Index;\r | |
174 | RETURN_STATUS Status;\r | |
175 | EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;\r | |
176 | \r | |
177 | //\r | |
178 | // Check input paramter\r | |
179 | //\r | |
180 | ASSERT (SectionGuid != NULL);\r | |
181 | ASSERT (GetInfoHandler != NULL);\r | |
182 | ASSERT (DecodeHandler != NULL);\r | |
183 | \r | |
184 | //\r | |
185 | // Get the registered handler information\r | |
186 | //\r | |
187 | Status = GetExtractGuidedSectionHandlerInfo (&HandlerInfo);\r | |
188 | if (RETURN_ERROR (Status)) {\r | |
189 | return Status;\r | |
190 | }\r | |
191 | \r | |
192 | //\r | |
193 | // Search the match registered GetInfo handler for the input guided section.\r | |
194 | //\r | |
3dbef428 | 195 | ASSERT (HandlerInfo != NULL);\r |
b9d5a7f1 LG |
196 | for (Index = 0; Index < HandlerInfo->NumberOfExtractHandler; Index ++) {\r |
197 | if (CompareGuid (HandlerInfo->ExtractHandlerGuidTable + Index, SectionGuid)) {\r | |
198 | //\r | |
199 | // If the guided handler has been registered before, only update its handler.\r | |
200 | //\r | |
201 | HandlerInfo->ExtractDecodeHandlerTable [Index] = DecodeHandler;\r | |
202 | HandlerInfo->ExtractGetInfoHandlerTable [Index] = GetInfoHandler;\r | |
203 | return RETURN_SUCCESS;\r | |
204 | }\r | |
205 | }\r | |
206 | \r | |
207 | //\r | |
208 | // Check the global table is enough to contain new Handler.\r | |
209 | //\r | |
210 | if (HandlerInfo->NumberOfExtractHandler >= PcdGet32 (PcdMaximumGuidedExtractHandler)) {\r | |
211 | return RETURN_OUT_OF_RESOURCES;\r | |
212 | }\r | |
213 | \r | |
214 | //\r | |
215 | // Register new Handler and guid value.\r | |
216 | //\r | |
217 | CopyGuid (HandlerInfo->ExtractHandlerGuidTable + HandlerInfo->NumberOfExtractHandler, SectionGuid);\r | |
218 | HandlerInfo->ExtractDecodeHandlerTable [HandlerInfo->NumberOfExtractHandler] = DecodeHandler;\r | |
219 | HandlerInfo->ExtractGetInfoHandlerTable [HandlerInfo->NumberOfExtractHandler++] = GetInfoHandler;\r | |
220 | \r | |
221 | return RETURN_SUCCESS;\r | |
222 | }\r | |
223 | \r | |
224 | /**\r | |
225 | Retrieves a GUID from a GUIDed section and uses that GUID to select an associated handler of type\r | |
226 | EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers().\r | |
227 | The selected handler is used to retrieve and return the size of the decoded buffer and the size of an\r | |
228 | optional scratch buffer required to actually decode the data in a GUIDed section.\r | |
229 | \r | |
230 | Examines a GUIDed section specified by InputSection. \r | |
231 | If GUID for InputSection does not match any of the GUIDs registered through ExtractGuidedSectionRegisterHandlers(),\r | |
232 | then RETURN_UNSUPPORTED is returned. \r | |
233 | If the GUID of InputSection does match the GUID that this handler supports, then the the associated handler \r | |
234 | of type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers()\r | |
235 | is used to retrieve the OututBufferSize, ScratchSize, and Attributes values. The return status from the handler of\r | |
236 | type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER is returned.\r | |
237 | \r | |
238 | If InputSection is NULL, then ASSERT().\r | |
239 | If OutputBufferSize is NULL, then ASSERT().\r | |
240 | If ScratchBufferSize is NULL, then ASSERT().\r | |
241 | If SectionAttribute is NULL, then ASSERT().\r | |
242 | \r | |
243 | @param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.\r | |
244 | @param[out] OutputBufferSize A pointer to the size, in bytes, of an output buffer required if the buffer\r | |
245 | specified by InputSection were decoded.\r | |
246 | @param[out] ScratchBufferSize A pointer to the size, in bytes, required as scratch space if the buffer specified by\r | |
247 | InputSection were decoded.\r | |
248 | @param[out] SectionAttribute A pointer to the attributes of the GUIDed section. See the Attributes field of\r | |
249 | EFI_GUID_DEFINED_SECTION in the PI Specification.\r | |
250 | \r | |
35a17154 | 251 | @retval RETURN_SUCCESS Successfully retrieved the required information.\r |
b9d5a7f1 LG |
252 | @retval RETURN_UNSUPPORTED The GUID from the section specified by InputSection does not match any of\r |
253 | the GUIDs registered with ExtractGuidedSectionRegisterHandlers().\r | |
254 | @retval Others The return status from the handler associated with the GUID retrieved from\r | |
255 | the section specified by InputSection.\r | |
256 | \r | |
257 | **/\r | |
258 | RETURN_STATUS\r | |
259 | EFIAPI\r | |
260 | ExtractGuidedSectionGetInfo (\r | |
261 | IN CONST VOID *InputSection,\r | |
262 | OUT UINT32 *OutputBufferSize,\r | |
263 | OUT UINT32 *ScratchBufferSize,\r | |
264 | OUT UINT16 *SectionAttribute \r | |
265 | )\r | |
266 | {\r | |
267 | UINT32 Index;\r | |
268 | RETURN_STATUS Status;\r | |
269 | EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;\r | |
30f001ca | 270 | EFI_GUID *SectionDefinitionGuid;\r |
b9d5a7f1 LG |
271 | \r |
272 | //\r | |
273 | // Check input paramter\r | |
274 | //\r | |
275 | ASSERT (InputSection != NULL);\r | |
276 | ASSERT (OutputBufferSize != NULL);\r | |
277 | ASSERT (ScratchBufferSize != NULL);\r | |
278 | ASSERT (SectionAttribute != NULL);\r | |
279 | \r | |
280 | //\r | |
281 | // Get all registered handler information.\r | |
282 | //\r | |
283 | Status = GetExtractGuidedSectionHandlerInfo (&HandlerInfo);\r | |
284 | if (RETURN_ERROR (Status)) {\r | |
285 | return Status;\r | |
286 | }\r | |
287 | \r | |
30f001ca SZ |
288 | if (IS_SECTION2 (InputSection)) {\r |
289 | SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid);\r | |
290 | } else {\r | |
291 | SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid);\r | |
292 | }\r | |
293 | \r | |
b9d5a7f1 LG |
294 | //\r |
295 | // Search the match registered GetInfo handler for the input guided section.\r | |
296 | //\r | |
3dbef428 | 297 | ASSERT (HandlerInfo != NULL);\r |
b9d5a7f1 | 298 | for (Index = 0; Index < HandlerInfo->NumberOfExtractHandler; Index ++) {\r |
30f001ca | 299 | if (CompareGuid (HandlerInfo->ExtractHandlerGuidTable + Index, SectionDefinitionGuid)) {\r |
b9d5a7f1 | 300 | //\r |
58380e9c | 301 | // Call the match handler to get information for the input section data.\r |
b9d5a7f1 LG |
302 | //\r |
303 | return HandlerInfo->ExtractGetInfoHandlerTable [Index] (\r | |
304 | InputSection,\r | |
305 | OutputBufferSize,\r | |
306 | ScratchBufferSize,\r | |
307 | SectionAttribute\r | |
308 | );\r | |
309 | }\r | |
310 | }\r | |
311 | \r | |
312 | //\r | |
313 | // Not found, the input guided section is not supported. \r | |
314 | //\r | |
315 | return RETURN_UNSUPPORTED;\r | |
316 | }\r | |
317 | \r | |
318 | /**\r | |
319 | Retrieves the GUID from a GUIDed section and uses that GUID to select an associated handler of type\r | |
320 | EXTRACT_GUIDED_SECTION_DECODE_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers().\r | |
321 | The selected handler is used to decode the data in a GUIDed section and return the result in a caller\r | |
322 | allocated output buffer.\r | |
323 | \r | |
324 | Decodes the GUIDed section specified by InputSection. \r | |
325 | If GUID for InputSection does not match any of the GUIDs registered through ExtractGuidedSectionRegisterHandlers(),\r | |
326 | then RETURN_UNSUPPORTED is returned. \r | |
327 | If the GUID of InputSection does match the GUID that this handler supports, then the the associated handler\r | |
328 | of type EXTRACT_GUIDED_SECTION_DECODE_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers()\r | |
329 | is used to decode InputSection into the buffer specified by OutputBuffer and the authentication status of this\r | |
330 | decode operation is returned in AuthenticationStatus. If the decoded buffer is identical to the data in InputSection,\r | |
35a17154 | 331 | then OutputBuffer is set to point at the data in InputSection. Otherwise, the decoded data will be placed in a caller\r |
b9d5a7f1 LG |
332 | allocated buffer specified by OutputBuffer. This function is responsible for computing the EFI_AUTH_STATUS_PLATFORM_OVERRIDE\r |
333 | bit of in AuthenticationStatus. The return status from the handler of type EXTRACT_GUIDED_SECTION_DECODE_HANDLER is returned. \r | |
334 | \r | |
335 | If InputSection is NULL, then ASSERT().\r | |
336 | If OutputBuffer is NULL, then ASSERT().\r | |
337 | If ScratchBuffer is NULL and this decode operation requires a scratch buffer, then ASSERT().\r | |
338 | If AuthenticationStatus is NULL, then ASSERT(). \r | |
339 | \r | |
340 | @param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.\r | |
341 | @param[out] OutputBuffer A pointer to a buffer that contains the result of a decode operation. \r | |
342 | @param[in] ScratchBuffer A caller allocated buffer that may be required by this function as a scratch buffer to perform the decode operation. \r | |
343 | @param[out] AuthenticationStatus \r | |
344 | A pointer to the authentication status of the decoded output buffer. See the definition\r | |
345 | of authentication status in the EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI section of the PI\r | |
346 | Specification.\r | |
347 | \r | |
348 | @retval RETURN_SUCCESS The buffer specified by InputSection was decoded.\r | |
349 | @retval RETURN_UNSUPPORTED The section specified by InputSection does not match the GUID this handler supports.\r | |
350 | @retval RETURN_INVALID_PARAMETER The section specified by InputSection can not be decoded.\r | |
351 | \r | |
352 | **/\r | |
353 | RETURN_STATUS\r | |
354 | EFIAPI\r | |
355 | ExtractGuidedSectionDecode (\r | |
356 | IN CONST VOID *InputSection,\r | |
357 | OUT VOID **OutputBuffer,\r | |
358 | IN VOID *ScratchBuffer, OPTIONAL\r | |
359 | OUT UINT32 *AuthenticationStatus \r | |
360 | )\r | |
361 | {\r | |
362 | UINT32 Index;\r | |
363 | RETURN_STATUS Status;\r | |
364 | EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;\r | |
30f001ca | 365 | EFI_GUID *SectionDefinitionGuid;\r |
b9d5a7f1 LG |
366 | \r |
367 | //\r | |
368 | // Check input parameter\r | |
369 | //\r | |
370 | ASSERT (InputSection != NULL);\r | |
371 | ASSERT (OutputBuffer != NULL);\r | |
372 | ASSERT (AuthenticationStatus != NULL);\r | |
373 | \r | |
374 | //\r | |
375 | // Get all registered handler information.\r | |
376 | // \r | |
377 | Status = GetExtractGuidedSectionHandlerInfo (&HandlerInfo);\r | |
378 | if (RETURN_ERROR (Status)) {\r | |
379 | return Status;\r | |
380 | }\r | |
381 | \r | |
30f001ca SZ |
382 | if (IS_SECTION2 (InputSection)) {\r |
383 | SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid);\r | |
384 | } else {\r | |
385 | SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid);\r | |
386 | }\r | |
387 | \r | |
b9d5a7f1 LG |
388 | //\r |
389 | // Search the match registered Extract handler for the input guided section.\r | |
390 | //\r | |
3dbef428 | 391 | ASSERT (HandlerInfo != NULL);\r |
b9d5a7f1 | 392 | for (Index = 0; Index < HandlerInfo->NumberOfExtractHandler; Index ++) {\r |
30f001ca | 393 | if (CompareGuid (HandlerInfo->ExtractHandlerGuidTable + Index, SectionDefinitionGuid)) {\r |
b9d5a7f1 LG |
394 | //\r |
395 | // Call the match handler to extract raw data for the input guided section.\r | |
396 | //\r | |
397 | return HandlerInfo->ExtractDecodeHandlerTable [Index] (\r | |
398 | InputSection,\r | |
399 | OutputBuffer,\r | |
400 | ScratchBuffer,\r | |
401 | AuthenticationStatus\r | |
402 | );\r | |
403 | }\r | |
404 | }\r | |
405 | \r | |
406 | //\r | |
407 | // Not found, the input guided section is not supported. \r | |
408 | //\r | |
409 | return RETURN_UNSUPPORTED;\r | |
410 | }\r | |
9be899c5 ED |
411 | \r |
412 | /**\r | |
413 | Retrieves handlers of type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER and \r | |
414 | EXTRACT_GUIDED_SECTION_DECODE_HANDLER for a specific GUID section type.\r | |
415 | \r | |
416 | Retrieves the handlers associated with SectionGuid and returns them in \r | |
417 | GetInfoHandler and DecodeHandler.\r | |
418 | \r | |
419 | If the GUID value specified by SectionGuid has not been registered, then \r | |
420 | return RETURN_NOT_FOUND.\r | |
421 | \r | |
422 | If SectionGuid is NULL, then ASSERT().\r | |
423 | \r | |
424 | @param[in] SectionGuid A pointer to the GUID associated with the handlersof the GUIDed \r | |
425 | section type being retrieved.\r | |
426 | @param[out] GetInfoHandler Pointer to a function that examines a GUIDed section and returns \r | |
427 | the size of the decoded buffer and the size of an optional scratch \r | |
428 | buffer required to actually decode the data in a GUIDed section. \r | |
429 | This is an optional parameter that may be NULL. If it is NULL, then \r | |
430 | the previously registered handler is not returned.\r | |
431 | @param[out] DecodeHandler Pointer to a function that decodes a GUIDed section into a caller\r | |
432 | allocated output buffer. This is an optional parameter that may be NULL.\r | |
433 | If it is NULL, then the previously registered handler is not returned.\r | |
434 | \r | |
435 | @retval RETURN_SUCCESS The handlers were retrieved.\r | |
436 | @retval RETURN_NOT_FOUND No handlers have been registered with the specified GUID.\r | |
437 | \r | |
438 | **/\r | |
439 | RETURN_STATUS\r | |
440 | EFIAPI\r | |
441 | ExtractGuidedSectionGetHandlers (\r | |
442 | IN CONST GUID *SectionGuid,\r | |
443 | OUT EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *GetInfoHandler, OPTIONAL\r | |
444 | OUT EXTRACT_GUIDED_SECTION_DECODE_HANDLER *DecodeHandler OPTIONAL\r | |
445 | )\r | |
446 | {\r | |
447 | UINT32 Index;\r | |
448 | RETURN_STATUS Status;\r | |
449 | EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;\r | |
450 | \r | |
451 | //\r | |
452 | // Check input paramter\r | |
453 | //\r | |
454 | ASSERT (SectionGuid != NULL);\r | |
455 | \r | |
456 | //\r | |
457 | // Get the registered handler information\r | |
458 | //\r | |
459 | Status = GetExtractGuidedSectionHandlerInfo (&HandlerInfo);\r | |
460 | if (RETURN_ERROR (Status)) {\r | |
461 | return Status;\r | |
462 | }\r | |
463 | \r | |
464 | //\r | |
465 | // Search the match registered GetInfo handler for the input guided section.\r | |
466 | //\r | |
467 | ASSERT (HandlerInfo != NULL);\r | |
468 | for (Index = 0; Index < HandlerInfo->NumberOfExtractHandler; Index ++) {\r | |
469 | if (CompareGuid (HandlerInfo->ExtractHandlerGuidTable + Index, SectionGuid)) {\r | |
470 | \r | |
471 | //\r | |
472 | // If the guided handler has been registered before, then return the registered handlers.\r | |
473 | //\r | |
474 | if (GetInfoHandler != NULL) {\r | |
475 | *GetInfoHandler = HandlerInfo->ExtractGetInfoHandlerTable[Index];\r | |
476 | }\r | |
477 | if (DecodeHandler != NULL) {\r | |
478 | *DecodeHandler = HandlerInfo->ExtractDecodeHandlerTable[Index];\r | |
479 | }\r | |
480 | return RETURN_SUCCESS;\r | |
481 | }\r | |
482 | }\r | |
483 | return RETURN_NOT_FOUND;\r | |
484 | }\r |