1 /** @file
2 Provide generic extract guided section functions for Dxe phase.
3
4 Copyright (c) 2007 - 2012, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php.
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13 **/
14
15 #include <PiDxe.h>
16
17 #include <Library/DebugLib.h>
18 #include <Library/BaseMemoryLib.h>
19 #include <Library/MemoryAllocationLib.h>
20 #include <Library/ExtractGuidedSectionLib.h>
21 #include <Library/UefiBootServicesTableLib.h>
22
23 #define EXTRACT_HANDLER_TABLE_SIZE 0x10
24
25 UINT32 mNumberOfExtractHandler = 0;
26 UINT32 mMaxNumberOfExtractHandler = 0;
27
28 GUID *mExtractHandlerGuidTable = NULL;
29 EXTRACT_GUIDED_SECTION_DECODE_HANDLER *mExtractDecodeHandlerTable = NULL;
30 EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *mExtractGetInfoHandlerTable = NULL;
31
32 /**
33 Reallocates more global memory to store the registered guid and Handler list.
34
35 @retval RETURN_SUCCESS Reallocated more global memory space to store guid and function tables.
36 @retval RETURN_OUT_OF_RESOURCES Not enough memory to allocate.
37 **/
38 RETURN_STATUS
39 EFIAPI
ReallocateExtractHandlerTable()40 ReallocateExtractHandlerTable (
41 )
42 {
43 //
44 // Reallocate memory for GuidTable
45 //
46 mExtractHandlerGuidTable = ReallocatePool (
47 mMaxNumberOfExtractHandler * sizeof (GUID),
48 (mMaxNumberOfExtractHandler + EXTRACT_HANDLER_TABLE_SIZE) * sizeof (GUID),
49 mExtractHandlerGuidTable
50 );
51
52 if (mExtractHandlerGuidTable == NULL) {
53 goto Done;
54 }
55
56 //
57 // Reallocate memory for Decode handler Table
58 //
59 mExtractDecodeHandlerTable = ReallocatePool (
60 mMaxNumberOfExtractHandler * sizeof (EXTRACT_GUIDED_SECTION_DECODE_HANDLER),
61 (mMaxNumberOfExtractHandler + EXTRACT_HANDLER_TABLE_SIZE) * sizeof (EXTRACT_GUIDED_SECTION_DECODE_HANDLER),
62 mExtractDecodeHandlerTable
63 );
64
65 if (mExtractDecodeHandlerTable == NULL) {
66 goto Done;
67 }
68
69 //
70 // Reallocate memory for GetInfo handler Table
71 //
72 mExtractGetInfoHandlerTable = ReallocatePool (
73 mMaxNumberOfExtractHandler * sizeof (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER),
74 (mMaxNumberOfExtractHandler + EXTRACT_HANDLER_TABLE_SIZE) * sizeof (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER),
75 mExtractGetInfoHandlerTable
76 );
77
78 if (mExtractGetInfoHandlerTable == NULL) {
79 goto Done;
80 }
81
82 //
83 // Increase max handler number
84 //
85 mMaxNumberOfExtractHandler = mMaxNumberOfExtractHandler + EXTRACT_HANDLER_TABLE_SIZE;
86 return RETURN_SUCCESS;
87
88 Done:
89 if (mExtractHandlerGuidTable != NULL) {
90 FreePool (mExtractHandlerGuidTable);
91 }
92 if (mExtractDecodeHandlerTable != NULL) {
93 FreePool (mExtractDecodeHandlerTable);
94 }
95 if (mExtractGetInfoHandlerTable != NULL) {
96 FreePool (mExtractGetInfoHandlerTable);
97 }
98
99 return RETURN_OUT_OF_RESOURCES;
100 }
101 /**
102 Constructor allocates the global memory to store the registered guid and Handler list.
103
104 @param ImageHandle The firmware allocated handle for the EFI image.
105 @param SystemTable A pointer to the EFI System Table.
106
107 @retval RETURN_SUCCESS Allocated the global memory space to store guid and function tables.
108 @retval RETURN_OUT_OF_RESOURCES Not enough memory to allocate.
109 **/
110 RETURN_STATUS
111 EFIAPI
DxeExtractGuidedSectionLibConstructor(IN EFI_HANDLE ImageHandle,IN EFI_SYSTEM_TABLE * SystemTable)112 DxeExtractGuidedSectionLibConstructor (
113 IN EFI_HANDLE ImageHandle,
114 IN EFI_SYSTEM_TABLE *SystemTable
115 )
116 {
117 return ReallocateExtractHandlerTable ();
118 }
119
120 /**
121 Retrieve the list GUIDs that have been registered through ExtractGuidedSectionRegisterHandlers().
122
123 Sets ExtractHandlerGuidTable so it points at a callee allocated array of registered GUIDs.
124 The total number of GUIDs in the array are returned. Since the array of GUIDs is callee allocated
125 and caller must treat this array of GUIDs as read-only data.
126 If ExtractHandlerGuidTable is NULL, then ASSERT().
127
128 @param[out] ExtractHandlerGuidTable A pointer to the array of GUIDs that have been registered through
129 ExtractGuidedSectionRegisterHandlers().
130
131 @return The number of the supported extract guided Handler.
132
133 **/
134 UINTN
135 EFIAPI
ExtractGuidedSectionGetGuidList(OUT GUID ** ExtractHandlerGuidTable)136 ExtractGuidedSectionGetGuidList (
137 OUT GUID **ExtractHandlerGuidTable
138 )
139 {
140 ASSERT (ExtractHandlerGuidTable != NULL);
141
142 *ExtractHandlerGuidTable = mExtractHandlerGuidTable;
143 return mNumberOfExtractHandler;
144 }
145
146 /**
147 Registers handlers of type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER and EXTRACT_GUIDED_SECTION_DECODE_HANDLER
148 for a specific GUID section type.
149
150 Registers the handlers specified by GetInfoHandler and DecodeHandler with the GUID specified by SectionGuid.
151 If the GUID value specified by SectionGuid has already been registered, then return RETURN_ALREADY_STARTED.
152 If there are not enough resources available to register the handlers then RETURN_OUT_OF_RESOURCES is returned.
153
154 If SectionGuid is NULL, then ASSERT().
155 If GetInfoHandler is NULL, then ASSERT().
156 If DecodeHandler is NULL, then ASSERT().
157
158 @param[in] SectionGuid A pointer to the GUID associated with the the handlers
159 of the GUIDed section type being registered.
160 @param[in] GetInfoHandler The pointer to a function that examines a GUIDed section and returns the
161 size of the decoded buffer and the size of an optional scratch buffer
162 required to actually decode the data in a GUIDed section.
163 @param[in] DecodeHandler The pointer to a function that decodes a GUIDed section into a caller
164 allocated output buffer.
165
166 @retval RETURN_SUCCESS The handlers were registered.
167 @retval RETURN_OUT_OF_RESOURCES There are not enough resources available to register the handlers.
168
169 **/
170 RETURN_STATUS
171 EFIAPI
ExtractGuidedSectionRegisterHandlers(IN CONST GUID * SectionGuid,IN EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER GetInfoHandler,IN EXTRACT_GUIDED_SECTION_DECODE_HANDLER DecodeHandler)172 ExtractGuidedSectionRegisterHandlers (
173 IN CONST GUID *SectionGuid,
174 IN EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER GetInfoHandler,
175 IN EXTRACT_GUIDED_SECTION_DECODE_HANDLER DecodeHandler
176 )
177 {
178 UINT32 Index;
179 VOID *GuidData;
180
181 //
182 // Check input parameter.
183 //
184 ASSERT (SectionGuid != NULL);
185 ASSERT (GetInfoHandler != NULL);
186 ASSERT (DecodeHandler != NULL);
187
188 //
189 // Search the match registered GetInfo handler for the input guided section.
190 //
191 for (Index = 0; Index < mNumberOfExtractHandler; Index ++) {
192 if (CompareGuid (&mExtractHandlerGuidTable[Index], SectionGuid)) {
193 //
194 // If the guided handler has been registered before, only update its handler.
195 //
196 mExtractDecodeHandlerTable [Index] = DecodeHandler;
197 mExtractGetInfoHandlerTable [Index] = GetInfoHandler;
198 return RETURN_SUCCESS;
199 }
200 }
201
202 //
203 // Check the global table is enough to contain new Handler.
204 //
205 if (mNumberOfExtractHandler >= mMaxNumberOfExtractHandler) {
206 if (ReallocateExtractHandlerTable () != RETURN_SUCCESS) {
207 return RETURN_OUT_OF_RESOURCES;
208 }
209 }
210
211 //
212 // Register new Handler and guid value.
213 //
214 CopyGuid (&mExtractHandlerGuidTable [mNumberOfExtractHandler], SectionGuid);
215 mExtractDecodeHandlerTable [mNumberOfExtractHandler] = DecodeHandler;
216 mExtractGetInfoHandlerTable [mNumberOfExtractHandler++] = GetInfoHandler;
217
218 //
219 // Install the Guided Section GUID configuration table to record the GUID itself.
220 // Then the content of the configuration table buffer will be the same as the GUID value itself.
221 //
222 GuidData = AllocateCopyPool (sizeof (GUID), (VOID *) SectionGuid);
223 if (GuidData != NULL) {
224 gBS->InstallConfigurationTable ((EFI_GUID *) SectionGuid, GuidData);
225 }
226
227 return RETURN_SUCCESS;
228 }
229
230 /**
231 Retrieves a GUID from a GUIDed section and uses that GUID to select an associated handler of type
232 EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers().
233 The selected handler is used to retrieve and return the size of the decoded buffer and the size of an
234 optional scratch buffer required to actually decode the data in a GUIDed section.
235
236 Examines a GUIDed section specified by InputSection.
237 If GUID for InputSection does not match any of the GUIDs registered through ExtractGuidedSectionRegisterHandlers(),
238 then RETURN_UNSUPPORTED is returned.
239 If the GUID of InputSection does match the GUID that this handler supports, then the the associated handler
240 of type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers()
241 is used to retrieve the OututBufferSize, ScratchSize, and Attributes values. The return status from the handler of
242 type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER is returned.
243
244 If InputSection is NULL, then ASSERT().
245 If OutputBufferSize is NULL, then ASSERT().
246 If ScratchBufferSize is NULL, then ASSERT().
247 If SectionAttribute is NULL, then ASSERT().
248
249 @param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
250 @param[out] OutputBufferSize A pointer to the size, in bytes, of an output buffer required if the buffer
251 specified by InputSection were decoded.
252 @param[out] ScratchBufferSize A pointer to the size, in bytes, required as scratch space if the buffer specified by
253 InputSection were decoded.
254 @param[out] SectionAttribute A pointer to the attributes of the GUIDed section. See the Attributes field of
255 EFI_GUID_DEFINED_SECTION in the PI Specification.
256
257 @retval RETURN_SUCCESS Successfully obtained the required information.
258 @retval RETURN_UNSUPPORTED The GUID from the section specified by InputSection does not match any of
259 the GUIDs registered with ExtractGuidedSectionRegisterHandlers().
260 @retval Others The return status from the handler associated with the GUID retrieved from
261 the section specified by InputSection.
262
263 **/
264 RETURN_STATUS
265 EFIAPI
ExtractGuidedSectionGetInfo(IN CONST VOID * InputSection,OUT UINT32 * OutputBufferSize,OUT UINT32 * ScratchBufferSize,OUT UINT16 * SectionAttribute)266 ExtractGuidedSectionGetInfo (
267 IN CONST VOID *InputSection,
268 OUT UINT32 *OutputBufferSize,
269 OUT UINT32 *ScratchBufferSize,
270 OUT UINT16 *SectionAttribute
271 )
272 {
273 UINT32 Index;
274 EFI_GUID *SectionDefinitionGuid;
275
276 ASSERT (InputSection != NULL);
277 ASSERT (OutputBufferSize != NULL);
278 ASSERT (ScratchBufferSize != NULL);
279 ASSERT (SectionAttribute != NULL);
280
281 if (IS_SECTION2 (InputSection)) {
282 SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid);
283 } else {
284 SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid);
285 }
286
287 //
288 // Search the match registered GetInfo handler for the input guided section.
289 //
290 for (Index = 0; Index < mNumberOfExtractHandler; Index ++) {
291 if (CompareGuid (&mExtractHandlerGuidTable[Index], SectionDefinitionGuid)) {
292 //
293 // Call the match handler to getinfo for the input section data.
294 //
295 return mExtractGetInfoHandlerTable [Index] (
296 InputSection,
297 OutputBufferSize,
298 ScratchBufferSize,
299 SectionAttribute
300 );
301 }
302 }
303
304 //
305 // Not found, the input guided section is not supported.
306 //
307 return RETURN_UNSUPPORTED;
308 }
309
310 /**
311 Retrieves the GUID from a GUIDed section and uses that GUID to select an associated handler of type
312 EXTRACT_GUIDED_SECTION_DECODE_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers().
313 The selected handler is used to decode the data in a GUIDed section and return the result in a caller
314 allocated output buffer.
315
316 Decodes the GUIDed section specified by InputSection.
317 If GUID for InputSection does not match any of the GUIDs registered through ExtractGuidedSectionRegisterHandlers(),
318 then RETURN_UNSUPPORTED is returned.
319 If the GUID of InputSection does match the GUID that this handler supports, then the the associated handler
320 of type EXTRACT_GUIDED_SECTION_DECODE_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers()
321 is used to decode InputSection into the buffer specified by OutputBuffer and the authentication status of this
322 decode operation is returned in AuthenticationStatus. If the decoded buffer is identical to the data in InputSection,
323 then OutputBuffer is set to point at the data in InputSection. Otherwise, the decoded data will be placed in caller
324 allocated buffer specified by OutputBuffer. This function is responsible for computing the EFI_AUTH_STATUS_PLATFORM_OVERRIDE
325 bit of in AuthenticationStatus. The return status from the handler of type EXTRACT_GUIDED_SECTION_DECODE_HANDLER is returned.
326
327 If InputSection is NULL, then ASSERT().
328 If OutputBuffer is NULL, then ASSERT().
329 If ScratchBuffer is NULL and this decode operation requires a scratch buffer, then ASSERT().
330 If AuthenticationStatus is NULL, then ASSERT().
331
332 @param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
333 @param[out] OutputBuffer A pointer to a buffer that contains the result of a decode operation.
334 @param[in] ScratchBuffer A caller allocated buffer that may be required by this function as a scratch buffer to perform the decode operation.
335 @param[out] AuthenticationStatus
336 A pointer to the authentication status of the decoded output buffer. See the definition
337 of authentication status in the EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI section of the PI
338 Specification.
339
340 @retval RETURN_SUCCESS The buffer specified by InputSection was decoded.
341 @retval RETURN_UNSUPPORTED The section specified by InputSection does not match the GUID this handler supports.
342 @retval RETURN_INVALID_PARAMETER The section specified by InputSection can not be decoded.
343
344 **/
345 RETURN_STATUS
346 EFIAPI
ExtractGuidedSectionDecode(IN CONST VOID * InputSection,OUT VOID ** OutputBuffer,IN VOID * ScratchBuffer,OPTIONAL OUT UINT32 * AuthenticationStatus)347 ExtractGuidedSectionDecode (
348 IN CONST VOID *InputSection,
349 OUT VOID **OutputBuffer,
350 IN VOID *ScratchBuffer, OPTIONAL
351 OUT UINT32 *AuthenticationStatus
352 )
353 {
354 UINT32 Index;
355 EFI_GUID *SectionDefinitionGuid;
356
357 //
358 // Check the input parameters
359 //
360 ASSERT (InputSection != NULL);
361 ASSERT (OutputBuffer != NULL);
362 ASSERT (AuthenticationStatus != NULL);
363
364 if (IS_SECTION2 (InputSection)) {
365 SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid);
366 } else {
367 SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid);
368 }
369
370 //
371 // Search the match registered extract handler for the input guided section.
372 //
373 for (Index = 0; Index < mNumberOfExtractHandler; Index ++) {
374 if (CompareGuid (&mExtractHandlerGuidTable[Index], SectionDefinitionGuid)) {
375 //
376 // Call the match handler to extract raw data for the input section data.
377 //
378 return mExtractDecodeHandlerTable [Index] (
379 InputSection,
380 OutputBuffer,
381 ScratchBuffer,
382 AuthenticationStatus
383 );
384 }
385 }
386
387 //
388 // Not found, the input guided section is not supported.
389 //
390 return RETURN_UNSUPPORTED;
391 }
392
393 /**
394 Retrieves handlers of type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER and
395 EXTRACT_GUIDED_SECTION_DECODE_HANDLER for a specific GUID section type.
396
397 Retrieves the handlers associated with SectionGuid and returns them in
398 GetInfoHandler and DecodeHandler.
399
400 If the GUID value specified by SectionGuid has not been registered, then
401 return RETURN_NOT_FOUND.
402
403 If SectionGuid is NULL, then ASSERT().
404
405 @param[in] SectionGuid A pointer to the GUID associated with the handlersof the GUIDed
406 section type being retrieved.
407 @param[out] GetInfoHandler Pointer to a function that examines a GUIDed section and returns
408 the size of the decoded buffer and the size of an optional scratch
409 buffer required to actually decode the data in a GUIDed section.
410 This is an optional parameter that may be NULL. If it is NULL, then
411 the previously registered handler is not returned.
412 @param[out] DecodeHandler Pointer to a function that decodes a GUIDed section into a caller
413 allocated output buffer. This is an optional parameter that may be NULL.
414 If it is NULL, then the previously registered handler is not returned.
415
416 @retval RETURN_SUCCESS The handlers were retrieved.
417 @retval RETURN_NOT_FOUND No handlers have been registered with the specified GUID.
418
419 **/
420 RETURN_STATUS
421 EFIAPI
ExtractGuidedSectionGetHandlers(IN CONST GUID * SectionGuid,OUT EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER * GetInfoHandler,OPTIONAL OUT EXTRACT_GUIDED_SECTION_DECODE_HANDLER * DecodeHandler OPTIONAL)422 ExtractGuidedSectionGetHandlers (
423 IN CONST GUID *SectionGuid,
424 OUT EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *GetInfoHandler, OPTIONAL
425 OUT EXTRACT_GUIDED_SECTION_DECODE_HANDLER *DecodeHandler OPTIONAL
426 )
427 {
428 UINT32 Index;
429
430 //
431 // Check input parameter.
432 //
433 ASSERT (SectionGuid != NULL);
434
435 //
436 // Search the match registered GetInfo handler for the input guided section.
437 //
438 for (Index = 0; Index < mNumberOfExtractHandler; Index ++) {
439 if (CompareGuid (&mExtractHandlerGuidTable[Index], SectionGuid)) {
440
441 //
442 // If the guided handler has been registered before, then return the registered handlers.
443 //
444 if (GetInfoHandler != NULL) {
445 *GetInfoHandler = mExtractGetInfoHandlerTable[Index];
446 }
447 if (DecodeHandler != NULL) {
448 *DecodeHandler = mExtractDecodeHandlerTable[Index];
449 }
450 return RETURN_SUCCESS;
451 }
452 }
453 return RETURN_NOT_FOUND;
454 }
455