1 /** @file 2 Pei Core Load Image Support 3 4 Copyright (c) 2006 - 2016, 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 "PeiMain.h" 16 17 18 EFI_PEI_LOAD_FILE_PPI mPeiLoadImagePpi = { 19 PeiLoadImageLoadImageWrapper 20 }; 21 22 23 EFI_PEI_PPI_DESCRIPTOR gPpiLoadFilePpiList = { 24 (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST), 25 &gEfiPeiLoadFilePpiGuid, 26 &mPeiLoadImagePpi 27 }; 28 29 /** 30 31 Support routine for the PE/COFF Loader that reads a buffer from a PE/COFF file. 32 The function is used for XIP code to have optimized memory copy. 33 34 @param FileHandle - The handle to the PE/COFF file 35 @param FileOffset - The offset, in bytes, into the file to read 36 @param ReadSize - The number of bytes to read from the file starting at FileOffset 37 @param Buffer - A pointer to the buffer to read the data into. 38 39 @return EFI_SUCCESS - ReadSize bytes of data were read into Buffer from the PE/COFF file starting at FileOffset 40 41 **/ 42 EFI_STATUS 43 EFIAPI 44 PeiImageRead ( 45 IN VOID *FileHandle, 46 IN UINTN FileOffset, 47 IN UINTN *ReadSize, 48 OUT VOID *Buffer 49 ) 50 { 51 CHAR8 *Destination8; 52 CHAR8 *Source8; 53 54 Destination8 = Buffer; 55 Source8 = (CHAR8 *) ((UINTN) FileHandle + FileOffset); 56 if (Destination8 != Source8) { 57 CopyMem (Destination8, Source8, *ReadSize); 58 } 59 60 return EFI_SUCCESS; 61 } 62 63 /** 64 65 Support routine for the PE/COFF Loader that reads a buffer from a PE/COFF file. 66 The function is implemented as PIC so as to support shadowing. 67 68 @param FileHandle - The handle to the PE/COFF file 69 @param FileOffset - The offset, in bytes, into the file to read 70 @param ReadSize - The number of bytes to read from the file starting at FileOffset 71 @param Buffer - A pointer to the buffer to read the data into. 72 73 @return EFI_SUCCESS - ReadSize bytes of data were read into Buffer from the PE/COFF file starting at FileOffset 74 75 **/ 76 EFI_STATUS 77 EFIAPI 78 PeiImageReadForShadow ( 79 IN VOID *FileHandle, 80 IN UINTN FileOffset, 81 IN UINTN *ReadSize, 82 OUT VOID *Buffer 83 ) 84 { 85 volatile CHAR8 *Destination8; 86 CHAR8 *Source8; 87 UINTN Length; 88 89 Destination8 = Buffer; 90 Source8 = (CHAR8 *) ((UINTN) FileHandle + FileOffset); 91 if (Destination8 != Source8) { 92 Length = *ReadSize; 93 while ((Length--) > 0) { 94 *(Destination8++) = *(Source8++); 95 } 96 } 97 98 return EFI_SUCCESS; 99 } 100 101 /** 102 103 Support routine to get the Image read file function. 104 105 @param ImageContext - The context of the image being loaded 106 107 @retval EFI_SUCCESS - If Image function location is found 108 109 **/ 110 EFI_STATUS 111 GetImageReadFunction ( 112 IN PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext 113 ) 114 { 115 PEI_CORE_INSTANCE *Private; 116 VOID* MemoryBuffer; 117 118 Private = PEI_CORE_INSTANCE_FROM_PS_THIS (GetPeiServicesTablePointer ()); 119 120 if (Private->PeiMemoryInstalled && (((Private->HobList.HandoffInformationTable->BootMode != BOOT_ON_S3_RESUME) && PcdGetBool (PcdShadowPeimOnBoot)) || 121 ((Private->HobList.HandoffInformationTable->BootMode == BOOT_ON_S3_RESUME) && PcdGetBool (PcdShadowPeimOnS3Boot))) && 122 (EFI_IMAGE_MACHINE_TYPE_SUPPORTED(EFI_IMAGE_MACHINE_X64) || EFI_IMAGE_MACHINE_TYPE_SUPPORTED(EFI_IMAGE_MACHINE_IA32))) { 123 // 124 // Shadow algorithm makes lots of non ANSI C assumptions and only works for IA32 and X64 125 // compilers that have been tested 126 // 127 if (Private->ShadowedImageRead == NULL) { 128 MemoryBuffer = AllocatePages (0x400 / EFI_PAGE_SIZE + 1); 129 ASSERT (MemoryBuffer != NULL); 130 CopyMem (MemoryBuffer, (CONST VOID *) (UINTN) PeiImageReadForShadow, 0x400); 131 Private->ShadowedImageRead = (PE_COFF_LOADER_READ_FILE) (UINTN) MemoryBuffer; 132 } 133 134 ImageContext->ImageRead = Private->ShadowedImageRead; 135 } else { 136 ImageContext->ImageRead = PeiImageRead; 137 } 138 139 return EFI_SUCCESS; 140 } 141 /** 142 To check memory usage bit map array to figure out if the memory range the image will be loaded in is available or not. If 143 memory range is available, the function will mark the corresponding bits to 1 which indicates the memory range is used. 144 The function is only invoked when load modules at fixed address feature is enabled. 145 146 @param Private Pointer to the private data passed in from caller 147 @param ImageBase The base address the image will be loaded at. 148 @param ImageSize The size of the image 149 150 @retval EFI_SUCCESS The memory range the image will be loaded in is available 151 @retval EFI_NOT_FOUND The memory range the image will be loaded in is not available 152 **/ 153 EFI_STATUS 154 CheckAndMarkFixLoadingMemoryUsageBitMap ( 155 IN PEI_CORE_INSTANCE *Private, 156 IN EFI_PHYSICAL_ADDRESS ImageBase, 157 IN UINT32 ImageSize 158 ) 159 { 160 UINT32 DxeCodePageNumber; 161 UINT64 ReservedCodeSize; 162 EFI_PHYSICAL_ADDRESS PeiCodeBase; 163 UINT32 BaseOffsetPageNumber; 164 UINT32 TopOffsetPageNumber; 165 UINT32 Index; 166 UINT64 *MemoryUsageBitMap; 167 168 169 // 170 // The reserved code range includes RuntimeCodePage range, Boot time code range and PEI code range. 171 // 172 DxeCodePageNumber = PcdGet32(PcdLoadFixAddressBootTimeCodePageNumber); 173 DxeCodePageNumber += PcdGet32(PcdLoadFixAddressRuntimeCodePageNumber); 174 ReservedCodeSize = EFI_PAGES_TO_SIZE(DxeCodePageNumber + PcdGet32(PcdLoadFixAddressPeiCodePageNumber)); 175 PeiCodeBase = Private->LoadModuleAtFixAddressTopAddress - ReservedCodeSize; 176 177 // 178 // Test the memory range for loading the image in the PEI code range. 179 // 180 if ((Private->LoadModuleAtFixAddressTopAddress - EFI_PAGES_TO_SIZE(DxeCodePageNumber)) < (ImageBase + ImageSize) || 181 (PeiCodeBase > ImageBase)) { 182 return EFI_NOT_FOUND; 183 } 184 185 // 186 // Test if the memory is avalaible or not. 187 // 188 MemoryUsageBitMap = Private->PeiCodeMemoryRangeUsageBitMap; 189 BaseOffsetPageNumber = EFI_SIZE_TO_PAGES((UINT32)(ImageBase - PeiCodeBase)); 190 TopOffsetPageNumber = EFI_SIZE_TO_PAGES((UINT32)(ImageBase + ImageSize - PeiCodeBase)); 191 for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index ++) { 192 if ((MemoryUsageBitMap[Index / 64] & LShiftU64(1, (Index % 64))) != 0) { 193 // 194 // This page is already used. 195 // 196 return EFI_NOT_FOUND; 197 } 198 } 199 200 // 201 // Being here means the memory range is available. So mark the bits for the memory range 202 // 203 for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index ++) { 204 MemoryUsageBitMap[Index / 64] |= LShiftU64(1, (Index % 64)); 205 } 206 return EFI_SUCCESS; 207 } 208 /** 209 210 Get the fixed loading address from image header assigned by build tool. This function only be called 211 when Loading module at Fixed address feature enabled. 212 213 @param ImageContext Pointer to the image context structure that describes the PE/COFF 214 image that needs to be examined by this function. 215 @param Private Pointer to the private data passed in from caller 216 217 @retval EFI_SUCCESS An fixed loading address is assigned to this image by build tools . 218 @retval EFI_NOT_FOUND The image has no assigned fixed loading address. 219 220 **/ 221 EFI_STATUS 222 GetPeCoffImageFixLoadingAssignedAddress( 223 IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext, 224 IN PEI_CORE_INSTANCE *Private 225 ) 226 { 227 UINTN SectionHeaderOffset; 228 EFI_STATUS Status; 229 EFI_IMAGE_SECTION_HEADER SectionHeader; 230 EFI_IMAGE_OPTIONAL_HEADER_UNION *ImgHdr; 231 EFI_PHYSICAL_ADDRESS FixLoadingAddress; 232 UINT16 Index; 233 UINTN Size; 234 UINT16 NumberOfSections; 235 UINT64 ValueInSectionHeader; 236 237 238 FixLoadingAddress = 0; 239 Status = EFI_NOT_FOUND; 240 241 // 242 // Get PeHeader pointer 243 // 244 ImgHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)((CHAR8* )ImageContext->Handle + ImageContext->PeCoffHeaderOffset); 245 if (ImageContext->IsTeImage) { 246 // 247 // for TE image, the fix loading address is saved in first section header that doesn't point 248 // to code section. 249 // 250 SectionHeaderOffset = sizeof (EFI_TE_IMAGE_HEADER); 251 NumberOfSections = ImgHdr->Te.NumberOfSections; 252 } else { 253 SectionHeaderOffset = (UINTN)( 254 ImageContext->PeCoffHeaderOffset + 255 sizeof (UINT32) + 256 sizeof (EFI_IMAGE_FILE_HEADER) + 257 ImgHdr->Pe32.FileHeader.SizeOfOptionalHeader 258 ); 259 NumberOfSections = ImgHdr->Pe32.FileHeader.NumberOfSections; 260 } 261 // 262 // Get base address from the first section header that doesn't point to code section. 263 // 264 for (Index = 0; Index < NumberOfSections; Index++) { 265 // 266 // Read section header from file 267 // 268 Size = sizeof (EFI_IMAGE_SECTION_HEADER); 269 Status = ImageContext->ImageRead ( 270 ImageContext->Handle, 271 SectionHeaderOffset, 272 &Size, 273 &SectionHeader 274 ); 275 if (EFI_ERROR (Status)) { 276 return Status; 277 } 278 279 Status = EFI_NOT_FOUND; 280 281 if ((SectionHeader.Characteristics & EFI_IMAGE_SCN_CNT_CODE) == 0) { 282 // 283 // Build tool will save the address in PointerToRelocations & PointerToLineNumbers fields in the first section header 284 // that doesn't point to code section in image header, as well as ImageBase field of image header. A notable thing is 285 // that for PEIM, the value in ImageBase field may not be equal to the value in PointerToRelocations & PointerToLineNumbers because 286 // for XIP PEIM, ImageBase field holds the image base address running on the Flash. And PointerToRelocations & PointerToLineNumbers 287 // hold the image base address when it is shadow to the memory. And there is an assumption that when the feature is enabled, if a 288 // module is assigned a loading address by tools, PointerToRelocations & PointerToLineNumbers fields should NOT be Zero, or 289 // else, these 2 fields should be set to Zero 290 // 291 ValueInSectionHeader = ReadUnaligned64((UINT64*)&SectionHeader.PointerToRelocations); 292 if (ValueInSectionHeader != 0) { 293 // 294 // Found first section header that doesn't point to code section. 295 // 296 if ((INT64)PcdGet64(PcdLoadModuleAtFixAddressEnable) > 0) { 297 // 298 // When LMFA feature is configured as Load Module at Fixed Absolute Address mode, PointerToRelocations & PointerToLineNumbers field 299 // hold the absolute address of image base running in memory 300 // 301 FixLoadingAddress = ValueInSectionHeader; 302 } else { 303 // 304 // When LMFA feature is configured as Load Module at Fixed offset mode, PointerToRelocations & PointerToLineNumbers field 305 // hold the offset relative to a platform-specific top address. 306 // 307 FixLoadingAddress = (EFI_PHYSICAL_ADDRESS)(Private->LoadModuleAtFixAddressTopAddress + (INT64)ValueInSectionHeader); 308 } 309 // 310 // Check if the memory range is available. 311 // 312 Status = CheckAndMarkFixLoadingMemoryUsageBitMap (Private, FixLoadingAddress, (UINT32) ImageContext->ImageSize); 313 if (!EFI_ERROR(Status)) { 314 // 315 // The assigned address is valid. Return the specified loading address 316 // 317 ImageContext->ImageAddress = FixLoadingAddress; 318 } 319 } 320 break; 321 } 322 SectionHeaderOffset += sizeof (EFI_IMAGE_SECTION_HEADER); 323 } 324 DEBUG ((EFI_D_INFO|EFI_D_LOAD, "LOADING MODULE FIXED INFO: Loading module at fixed address 0x%11p. Status= %r \n", (VOID *)(UINTN)FixLoadingAddress, Status)); 325 return Status; 326 } 327 /** 328 329 Loads and relocates a PE/COFF image into memory. 330 If the image is not relocatable, it will not be loaded into memory and be loaded as XIP image. 331 332 @param FileHandle - Pointer to the FFS file header of the image. 333 @param Pe32Data - The base address of the PE/COFF file that is to be loaded and relocated 334 @param ImageAddress - The base address of the relocated PE/COFF image 335 @param ImageSize - The size of the relocated PE/COFF image 336 @param EntryPoint - The entry point of the relocated PE/COFF image 337 338 @retval EFI_SUCCESS The file was loaded and relocated 339 @retval EFI_OUT_OF_RESOURCES There was not enough memory to load and relocate the PE/COFF file 340 @retval EFI_WARN_BUFFER_TOO_SMALL 341 There is not enough heap to allocate the requested size. 342 This will not prevent the XIP image from being invoked. 343 344 **/ 345 EFI_STATUS 346 LoadAndRelocatePeCoffImage ( 347 IN EFI_PEI_FILE_HANDLE FileHandle, 348 IN VOID *Pe32Data, 349 OUT EFI_PHYSICAL_ADDRESS *ImageAddress, 350 OUT UINT64 *ImageSize, 351 OUT EFI_PHYSICAL_ADDRESS *EntryPoint 352 ) 353 { 354 EFI_STATUS Status; 355 PE_COFF_LOADER_IMAGE_CONTEXT ImageContext; 356 PEI_CORE_INSTANCE *Private; 357 UINT64 AlignImageSize; 358 BOOLEAN IsXipImage; 359 EFI_STATUS ReturnStatus; 360 BOOLEAN IsS3Boot; 361 BOOLEAN IsPeiModule; 362 BOOLEAN IsRegisterForShadow; 363 EFI_FV_FILE_INFO FileInfo; 364 365 Private = PEI_CORE_INSTANCE_FROM_PS_THIS (GetPeiServicesTablePointer ()); 366 367 ReturnStatus = EFI_SUCCESS; 368 IsXipImage = FALSE; 369 ZeroMem (&ImageContext, sizeof (ImageContext)); 370 ImageContext.Handle = Pe32Data; 371 Status = GetImageReadFunction (&ImageContext); 372 373 ASSERT_EFI_ERROR (Status); 374 375 Status = PeCoffLoaderGetImageInfo (&ImageContext); 376 if (EFI_ERROR (Status)) { 377 return Status; 378 } 379 380 // 381 // Initilize local IsS3Boot and IsRegisterForShadow variable 382 // 383 IsS3Boot = FALSE; 384 if (Private->HobList.HandoffInformationTable->BootMode == BOOT_ON_S3_RESUME) { 385 IsS3Boot = TRUE; 386 } 387 IsRegisterForShadow = FALSE; 388 if ((Private->CurrentFileHandle == FileHandle) 389 && (Private->Fv[Private->CurrentPeimFvCount].PeimState[Private->CurrentPeimCount] == PEIM_STATE_REGISITER_FOR_SHADOW)) { 390 IsRegisterForShadow = TRUE; 391 } 392 393 // 394 // XIP image that ImageAddress is same to Image handle. 395 // 396 if (ImageContext.ImageAddress == (EFI_PHYSICAL_ADDRESS)(UINTN) Pe32Data) { 397 IsXipImage = TRUE; 398 } 399 400 // 401 // Get file type first 402 // 403 Status = PeiServicesFfsGetFileInfo (FileHandle, &FileInfo); 404 ASSERT_EFI_ERROR (Status); 405 406 // 407 // Check whether the file type is PEI module. 408 // 409 IsPeiModule = FALSE; 410 if (FileInfo.FileType == EFI_FV_FILETYPE_PEI_CORE || 411 FileInfo.FileType == EFI_FV_FILETYPE_PEIM || 412 FileInfo.FileType == EFI_FV_FILETYPE_COMBINED_PEIM_DRIVER) { 413 IsPeiModule = TRUE; 414 } 415 416 // 417 // When Image has no reloc section, it can't be relocated into memory. 418 // 419 if (ImageContext.RelocationsStripped && (Private->PeiMemoryInstalled) && ((!IsPeiModule) || 420 (!IsS3Boot && (PcdGetBool (PcdShadowPeimOnBoot) || IsRegisterForShadow)) || (IsS3Boot && PcdGetBool (PcdShadowPeimOnS3Boot)))) { 421 DEBUG ((EFI_D_INFO|EFI_D_LOAD, "The image at 0x%08x without reloc section can't be loaded into memory\n", (UINTN) Pe32Data)); 422 } 423 424 // 425 // Set default base address to current image address. 426 // 427 ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) Pe32Data; 428 429 // 430 // Allocate Memory for the image when memory is ready, and image is relocatable. 431 // On normal boot, PcdShadowPeimOnBoot decides whether load PEIM or PeiCore into memory. 432 // On S3 boot, PcdShadowPeimOnS3Boot decides whether load PEIM or PeiCore into memory. 433 // 434 if ((!ImageContext.RelocationsStripped) && (Private->PeiMemoryInstalled) && ((!IsPeiModule) || 435 (!IsS3Boot && (PcdGetBool (PcdShadowPeimOnBoot) || IsRegisterForShadow)) || (IsS3Boot && PcdGetBool (PcdShadowPeimOnS3Boot)))) { 436 // 437 // Allocate more buffer to avoid buffer overflow. 438 // 439 if (ImageContext.IsTeImage) { 440 AlignImageSize = ImageContext.ImageSize + ((EFI_TE_IMAGE_HEADER *) Pe32Data)->StrippedSize - sizeof (EFI_TE_IMAGE_HEADER); 441 } else { 442 AlignImageSize = ImageContext.ImageSize; 443 } 444 445 if (ImageContext.SectionAlignment > EFI_PAGE_SIZE) { 446 AlignImageSize += ImageContext.SectionAlignment; 447 } 448 449 if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0 && (Private->HobList.HandoffInformationTable->BootMode != BOOT_ON_S3_RESUME)) { 450 Status = GetPeCoffImageFixLoadingAssignedAddress(&ImageContext, Private); 451 if (EFI_ERROR (Status)){ 452 DEBUG ((EFI_D_INFO|EFI_D_LOAD, "LOADING MODULE FIXED ERROR: Failed to load module at fixed address. \n")); 453 // 454 // The PEIM is not assiged valid address, try to allocate page to load it. 455 // 456 ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) AllocatePages (EFI_SIZE_TO_PAGES ((UINT32) AlignImageSize)); 457 } 458 } else { 459 ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) AllocatePages (EFI_SIZE_TO_PAGES ((UINT32) AlignImageSize)); 460 } 461 if (ImageContext.ImageAddress != 0) { 462 // 463 // Adjust the Image Address to make sure it is section alignment. 464 // 465 if (ImageContext.SectionAlignment > EFI_PAGE_SIZE) { 466 ImageContext.ImageAddress = 467 (ImageContext.ImageAddress + ImageContext.SectionAlignment - 1) & 468 ~((UINTN)ImageContext.SectionAlignment - 1); 469 } 470 // 471 // Fix alignment requirement when Load IPF TeImage into memory. 472 // Skip the reserved space for the stripped PeHeader when load TeImage into memory. 473 // 474 if (ImageContext.IsTeImage) { 475 ImageContext.ImageAddress = ImageContext.ImageAddress + 476 ((EFI_TE_IMAGE_HEADER *) Pe32Data)->StrippedSize - 477 sizeof (EFI_TE_IMAGE_HEADER); 478 } 479 } else { 480 // 481 // No enough memory resource. 482 // 483 if (IsXipImage) { 484 // 485 // XIP image can still be invoked. 486 // 487 ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) Pe32Data; 488 ReturnStatus = EFI_WARN_BUFFER_TOO_SMALL; 489 } else { 490 // 491 // Non XIP image can't be loaded because no enough memory is allocated. 492 // 493 ASSERT (FALSE); 494 return EFI_OUT_OF_RESOURCES; 495 } 496 } 497 } 498 499 // 500 // Load the image to our new buffer 501 // 502 Status = PeCoffLoaderLoadImage (&ImageContext); 503 if (EFI_ERROR (Status)) { 504 return Status; 505 } 506 // 507 // Relocate the image in our new buffer 508 // 509 Status = PeCoffLoaderRelocateImage (&ImageContext); 510 if (EFI_ERROR (Status)) { 511 return Status; 512 } 513 514 // 515 // Flush the instruction cache so the image data is written before we execute it 516 // 517 if (ImageContext.ImageAddress != (EFI_PHYSICAL_ADDRESS)(UINTN) Pe32Data) { 518 InvalidateInstructionCacheRange ((VOID *)(UINTN)ImageContext.ImageAddress, (UINTN)ImageContext.ImageSize); 519 } 520 521 *ImageAddress = ImageContext.ImageAddress; 522 *ImageSize = ImageContext.ImageSize; 523 *EntryPoint = ImageContext.EntryPoint; 524 525 return ReturnStatus; 526 } 527 528 /** 529 Loads a PEIM into memory for subsequent execution. If there are compressed 530 images or images that need to be relocated into memory for performance reasons, 531 this service performs that transformation. 532 533 @param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation 534 @param FileHandle Pointer to the FFS file header of the image. 535 @param ImageAddressArg Pointer to PE/TE image. 536 @param ImageSizeArg Size of PE/TE image. 537 @param EntryPoint Pointer to entry point of specified image file for output. 538 @param AuthenticationState - Pointer to attestation authentication state of image. 539 540 @retval EFI_SUCCESS Image is successfully loaded. 541 @retval EFI_NOT_FOUND Fail to locate necessary PPI. 542 @retval EFI_UNSUPPORTED Image Machine Type is not supported. 543 @retval EFI_WARN_BUFFER_TOO_SMALL 544 There is not enough heap to allocate the requested size. 545 This will not prevent the XIP image from being invoked. 546 547 **/ 548 EFI_STATUS 549 PeiLoadImageLoadImage ( 550 IN CONST EFI_PEI_SERVICES **PeiServices, 551 IN EFI_PEI_FILE_HANDLE FileHandle, 552 OUT EFI_PHYSICAL_ADDRESS *ImageAddressArg, OPTIONAL 553 OUT UINT64 *ImageSizeArg, OPTIONAL 554 OUT EFI_PHYSICAL_ADDRESS *EntryPoint, 555 OUT UINT32 *AuthenticationState 556 ) 557 { 558 EFI_STATUS Status; 559 VOID *Pe32Data; 560 EFI_PHYSICAL_ADDRESS ImageAddress; 561 UINT64 ImageSize; 562 EFI_PHYSICAL_ADDRESS ImageEntryPoint; 563 UINT16 Machine; 564 EFI_SECTION_TYPE SearchType1; 565 EFI_SECTION_TYPE SearchType2; 566 567 *EntryPoint = 0; 568 ImageSize = 0; 569 *AuthenticationState = 0; 570 571 if (FeaturePcdGet (PcdPeiCoreImageLoaderSearchTeSectionFirst)) { 572 SearchType1 = EFI_SECTION_TE; 573 SearchType2 = EFI_SECTION_PE32; 574 } else { 575 SearchType1 = EFI_SECTION_PE32; 576 SearchType2 = EFI_SECTION_TE; 577 } 578 579 // 580 // Try to find a first exe section (if PcdPeiCoreImageLoaderSearchTeSectionFirst 581 // is true, TE will be searched first). 582 // 583 Status = PeiServicesFfsFindSectionData3 ( 584 SearchType1, 585 0, 586 FileHandle, 587 &Pe32Data, 588 AuthenticationState 589 ); 590 // 591 // If we didn't find a first exe section, try to find the second exe section. 592 // 593 if (EFI_ERROR (Status)) { 594 Status = PeiServicesFfsFindSectionData3 ( 595 SearchType2, 596 0, 597 FileHandle, 598 &Pe32Data, 599 AuthenticationState 600 ); 601 if (EFI_ERROR (Status)) { 602 // 603 // PEI core only carry the loader function for TE and PE32 executables 604 // If this two section does not exist, just return. 605 // 606 return Status; 607 } 608 } 609 610 // 611 // If memory is installed, perform the shadow operations 612 // 613 Status = LoadAndRelocatePeCoffImage ( 614 FileHandle, 615 Pe32Data, 616 &ImageAddress, 617 &ImageSize, 618 &ImageEntryPoint 619 ); 620 621 ASSERT_EFI_ERROR (Status); 622 623 624 if (EFI_ERROR (Status)) { 625 return Status; 626 } 627 628 // 629 // Got the entry point from the loaded Pe32Data 630 // 631 Pe32Data = (VOID *) ((UINTN) ImageAddress); 632 *EntryPoint = ImageEntryPoint; 633 634 Machine = PeCoffLoaderGetMachineType (Pe32Data); 635 636 if (!EFI_IMAGE_MACHINE_TYPE_SUPPORTED (Machine)) { 637 if (!EFI_IMAGE_MACHINE_CROSS_TYPE_SUPPORTED (Machine)) { 638 return EFI_UNSUPPORTED; 639 } 640 } 641 642 if (ImageAddressArg != NULL) { 643 *ImageAddressArg = ImageAddress; 644 } 645 646 if (ImageSizeArg != NULL) { 647 *ImageSizeArg = ImageSize; 648 } 649 650 DEBUG_CODE_BEGIN (); 651 CHAR8 *AsciiString; 652 CHAR8 EfiFileName[512]; 653 INT32 Index; 654 INT32 StartIndex; 655 656 // 657 // Print debug message: Loading PEIM at 0x12345678 EntryPoint=0x12345688 Driver.efi 658 // 659 if (Machine != EFI_IMAGE_MACHINE_IA64) { 660 DEBUG ((EFI_D_INFO | EFI_D_LOAD, "Loading PEIM at 0x%11p EntryPoint=0x%11p ", (VOID *)(UINTN)ImageAddress, (VOID *)(UINTN)*EntryPoint)); 661 } else { 662 // 663 // For IPF Image, the real entry point should be print. 664 // 665 DEBUG ((EFI_D_INFO | EFI_D_LOAD, "Loading PEIM at 0x%11p EntryPoint=0x%11p ", (VOID *)(UINTN)ImageAddress, (VOID *)(UINTN)(*(UINT64 *)(UINTN)*EntryPoint))); 666 } 667 668 // 669 // Print Module Name by PeImage PDB file name. 670 // 671 AsciiString = PeCoffLoaderGetPdbPointer (Pe32Data); 672 673 if (AsciiString != NULL) { 674 StartIndex = 0; 675 for (Index = 0; AsciiString[Index] != 0; Index++) { 676 if (AsciiString[Index] == '\\' || AsciiString[Index] == '/') { 677 StartIndex = Index + 1; 678 } 679 } 680 681 // 682 // Copy the PDB file name to our temporary string, and replace .pdb with .efi 683 // The PDB file name is limited in the range of 0~511. 684 // If the length is bigger than 511, trim the redudant characters to avoid overflow in array boundary. 685 // 686 for (Index = 0; Index < sizeof (EfiFileName) - 4; Index++) { 687 EfiFileName[Index] = AsciiString[Index + StartIndex]; 688 if (EfiFileName[Index] == 0) { 689 EfiFileName[Index] = '.'; 690 } 691 if (EfiFileName[Index] == '.') { 692 EfiFileName[Index + 1] = 'e'; 693 EfiFileName[Index + 2] = 'f'; 694 EfiFileName[Index + 3] = 'i'; 695 EfiFileName[Index + 4] = 0; 696 break; 697 } 698 } 699 700 if (Index == sizeof (EfiFileName) - 4) { 701 EfiFileName[Index] = 0; 702 } 703 704 DEBUG ((EFI_D_INFO | EFI_D_LOAD, "%a", EfiFileName)); 705 } 706 707 DEBUG_CODE_END (); 708 709 DEBUG ((EFI_D_INFO | EFI_D_LOAD, "\n")); 710 711 return EFI_SUCCESS; 712 713 } 714 715 716 /** 717 The wrapper function of PeiLoadImageLoadImage(). 718 719 @param This - Pointer to EFI_PEI_LOAD_FILE_PPI. 720 @param FileHandle - Pointer to the FFS file header of the image. 721 @param ImageAddressArg - Pointer to PE/TE image. 722 @param ImageSizeArg - Size of PE/TE image. 723 @param EntryPoint - Pointer to entry point of specified image file for output. 724 @param AuthenticationState - Pointer to attestation authentication state of image. 725 726 @return Status of PeiLoadImageLoadImage(). 727 728 **/ 729 EFI_STATUS 730 EFIAPI 731 PeiLoadImageLoadImageWrapper ( 732 IN CONST EFI_PEI_LOAD_FILE_PPI *This, 733 IN EFI_PEI_FILE_HANDLE FileHandle, 734 OUT EFI_PHYSICAL_ADDRESS *ImageAddressArg, OPTIONAL 735 OUT UINT64 *ImageSizeArg, OPTIONAL 736 OUT EFI_PHYSICAL_ADDRESS *EntryPoint, 737 OUT UINT32 *AuthenticationState 738 ) 739 { 740 return PeiLoadImageLoadImage ( 741 GetPeiServicesTablePointer (), 742 FileHandle, 743 ImageAddressArg, 744 ImageSizeArg, 745 EntryPoint, 746 AuthenticationState 747 ); 748 } 749 750 /** 751 Check whether the input image has the relocation. 752 753 @param Pe32Data Pointer to the PE/COFF or TE image. 754 755 @retval TRUE Relocation is stripped. 756 @retval FALSE Relocation is not stripped. 757 758 **/ 759 BOOLEAN 760 RelocationIsStrip ( 761 IN VOID *Pe32Data 762 ) 763 { 764 EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr; 765 EFI_IMAGE_DOS_HEADER *DosHdr; 766 767 ASSERT (Pe32Data != NULL); 768 769 DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data; 770 if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) { 771 // 772 // DOS image header is present, so read the PE header after the DOS image header. 773 // 774 Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff)); 775 } else { 776 // 777 // DOS image header is not present, so PE header is at the image base. 778 // 779 Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data; 780 } 781 782 // 783 // Three cases with regards to relocations: 784 // - Image has base relocs, RELOCS_STRIPPED==0 => image is relocatable 785 // - Image has no base relocs, RELOCS_STRIPPED==1 => Image is not relocatable 786 // - Image has no base relocs, RELOCS_STRIPPED==0 => Image is relocatable but 787 // has no base relocs to apply 788 // Obviously having base relocations with RELOCS_STRIPPED==1 is invalid. 789 // 790 // Look at the file header to determine if relocations have been stripped, and 791 // save this info in the image context for later use. 792 // 793 if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) { 794 if ((Hdr.Te->DataDirectory[0].Size == 0) && (Hdr.Te->DataDirectory[0].VirtualAddress == 0)) { 795 return TRUE; 796 } else { 797 return FALSE; 798 } 799 } else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) { 800 if ((Hdr.Pe32->FileHeader.Characteristics & EFI_IMAGE_FILE_RELOCS_STRIPPED) != 0) { 801 return TRUE; 802 } else { 803 return FALSE; 804 } 805 } 806 807 return FALSE; 808 } 809 810 /** 811 Routine to load image file for subsequent execution by LoadFile Ppi. 812 If any LoadFile Ppi is not found, the build-in support function for the PE32+/TE 813 XIP image format is used. 814 815 @param PeiServices - An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation 816 @param FileHandle - Pointer to the FFS file header of the image. 817 @param PeimState - The dispatch state of the input PEIM handle. 818 @param EntryPoint - Pointer to entry point of specified image file for output. 819 @param AuthenticationState - Pointer to attestation authentication state of image. 820 821 @retval EFI_SUCCESS - Image is successfully loaded. 822 @retval EFI_NOT_FOUND - Fail to locate necessary PPI 823 @retval Others - Fail to load file. 824 825 **/ 826 EFI_STATUS 827 PeiLoadImage ( 828 IN CONST EFI_PEI_SERVICES **PeiServices, 829 IN EFI_PEI_FILE_HANDLE FileHandle, 830 IN UINT8 PeimState, 831 OUT EFI_PHYSICAL_ADDRESS *EntryPoint, 832 OUT UINT32 *AuthenticationState 833 ) 834 { 835 EFI_STATUS PpiStatus; 836 EFI_STATUS Status; 837 UINTN Index; 838 EFI_PEI_LOAD_FILE_PPI *LoadFile; 839 EFI_PHYSICAL_ADDRESS ImageAddress; 840 UINT64 ImageSize; 841 BOOLEAN IsStrip; 842 843 IsStrip = FALSE; 844 // 845 // If any instances of PEI_LOAD_FILE_PPI are installed, they are called. 846 // one at a time, until one reports EFI_SUCCESS. 847 // 848 Index = 0; 849 do { 850 PpiStatus = PeiServicesLocatePpi ( 851 &gEfiPeiLoadFilePpiGuid, 852 Index, 853 NULL, 854 (VOID **)&LoadFile 855 ); 856 if (!EFI_ERROR (PpiStatus)) { 857 Status = LoadFile->LoadFile ( 858 LoadFile, 859 FileHandle, 860 &ImageAddress, 861 &ImageSize, 862 EntryPoint, 863 AuthenticationState 864 ); 865 if (!EFI_ERROR (Status) || Status == EFI_WARN_BUFFER_TOO_SMALL) { 866 // 867 // The shadowed PEIM must be relocatable. 868 // 869 if (PeimState == PEIM_STATE_REGISITER_FOR_SHADOW) { 870 IsStrip = RelocationIsStrip ((VOID *) (UINTN) ImageAddress); 871 ASSERT (!IsStrip); 872 if (IsStrip) { 873 return EFI_UNSUPPORTED; 874 } 875 } 876 877 // 878 // The image to be started must have the machine type supported by PeiCore. 879 // 880 ASSERT (EFI_IMAGE_MACHINE_TYPE_SUPPORTED (PeCoffLoaderGetMachineType ((VOID *) (UINTN) ImageAddress))); 881 if (!EFI_IMAGE_MACHINE_TYPE_SUPPORTED (PeCoffLoaderGetMachineType ((VOID *) (UINTN) ImageAddress))) { 882 return EFI_UNSUPPORTED; 883 } 884 return EFI_SUCCESS; 885 } 886 } 887 Index++; 888 } while (!EFI_ERROR (PpiStatus)); 889 890 return PpiStatus; 891 } 892 893 894 /** 895 896 Install Pei Load File PPI. 897 898 899 @param PrivateData - Pointer to PEI_CORE_INSTANCE. 900 @param OldCoreData - Pointer to PEI_CORE_INSTANCE. 901 902 **/ 903 VOID 904 InitializeImageServices ( 905 IN PEI_CORE_INSTANCE *PrivateData, 906 IN PEI_CORE_INSTANCE *OldCoreData 907 ) 908 { 909 if (OldCoreData == NULL) { 910 // 911 // The first time we are XIP (running from FLASH). We need to remember the 912 // FLASH address so we can reinstall the memory version that runs faster 913 // 914 PrivateData->XipLoadFile = &gPpiLoadFilePpiList; 915 PeiServicesInstallPpi (PrivateData->XipLoadFile); 916 } else { 917 // 918 // 2nd time we are running from memory so replace the XIP version with the 919 // new memory version. 920 // 921 PeiServicesReInstallPpi (PrivateData->XipLoadFile, &gPpiLoadFilePpiList); 922 } 923 } 924 925 926 927 928
