1 /** @file 2 Locate the entry point for the PEI Core 3 4 Copyright (c) 2014, 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 <PiPei.h> 16 #include <Library/BaseLib.h> 17 #include <Library/PeCoffGetEntryPointLib.h> 18 19 #include "SecMain.h" 20 21 /** 22 Find core image base. 23 24 @param[in] BootFirmwareVolumePtr Point to the boot firmware volume. 25 @param[out] SecCoreImageBase The base address of the SEC core image. 26 @param[out] PeiCoreImageBase The base address of the PEI core image. 27 28 **/ 29 EFI_STATUS 30 EFIAPI 31 FindImageBase ( 32 IN EFI_FIRMWARE_VOLUME_HEADER *BootFirmwareVolumePtr, 33 OUT EFI_PHYSICAL_ADDRESS *SecCoreImageBase, 34 OUT EFI_PHYSICAL_ADDRESS *PeiCoreImageBase 35 ) 36 { 37 EFI_PHYSICAL_ADDRESS CurrentAddress; 38 EFI_PHYSICAL_ADDRESS EndOfFirmwareVolume; 39 EFI_FFS_FILE_HEADER *File; 40 UINT32 Size; 41 EFI_PHYSICAL_ADDRESS EndOfFile; 42 EFI_COMMON_SECTION_HEADER *Section; 43 EFI_PHYSICAL_ADDRESS EndOfSection; 44 45 *SecCoreImageBase = 0; 46 *PeiCoreImageBase = 0; 47 48 CurrentAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) BootFirmwareVolumePtr; 49 EndOfFirmwareVolume = CurrentAddress + BootFirmwareVolumePtr->FvLength; 50 51 // 52 // Loop through the FFS files in the Boot Firmware Volume 53 // 54 for (EndOfFile = CurrentAddress + BootFirmwareVolumePtr->HeaderLength; ; ) { 55 56 CurrentAddress = (EndOfFile + 7) & 0xfffffffffffffff8ULL; 57 if (CurrentAddress > EndOfFirmwareVolume) { 58 return EFI_NOT_FOUND; 59 } 60 61 File = (EFI_FFS_FILE_HEADER*)(UINTN) CurrentAddress; 62 if (IS_FFS_FILE2 (File)) { 63 Size = FFS_FILE2_SIZE (File); 64 if (Size <= 0x00FFFFFF) { 65 return EFI_NOT_FOUND; 66 } 67 } else { 68 Size = FFS_FILE_SIZE (File); 69 if (Size < sizeof (EFI_FFS_FILE_HEADER)) { 70 return EFI_NOT_FOUND; 71 } 72 } 73 74 EndOfFile = CurrentAddress + Size; 75 if (EndOfFile > EndOfFirmwareVolume) { 76 return EFI_NOT_FOUND; 77 } 78 79 // 80 // Look for SEC Core / PEI Core files 81 // 82 if (File->Type != EFI_FV_FILETYPE_SECURITY_CORE && 83 File->Type != EFI_FV_FILETYPE_PEI_CORE) { 84 continue; 85 } 86 87 // 88 // Loop through the FFS file sections within the FFS file 89 // 90 if (IS_FFS_FILE2 (File)) { 91 EndOfSection = (EFI_PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) File + sizeof (EFI_FFS_FILE_HEADER2)); 92 } else { 93 EndOfSection = (EFI_PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) File + sizeof (EFI_FFS_FILE_HEADER)); 94 } 95 for (;;) { 96 CurrentAddress = (EndOfSection + 3) & 0xfffffffffffffffcULL; 97 Section = (EFI_COMMON_SECTION_HEADER*)(UINTN) CurrentAddress; 98 99 if (IS_SECTION2 (Section)) { 100 Size = SECTION2_SIZE (Section); 101 if (Size <= 0x00FFFFFF) { 102 return EFI_NOT_FOUND; 103 } 104 } else { 105 Size = SECTION_SIZE (Section); 106 if (Size < sizeof (EFI_COMMON_SECTION_HEADER)) { 107 return EFI_NOT_FOUND; 108 } 109 } 110 111 EndOfSection = CurrentAddress + Size; 112 if (EndOfSection > EndOfFile) { 113 return EFI_NOT_FOUND; 114 } 115 116 // 117 // Look for executable sections 118 // 119 if (Section->Type == EFI_SECTION_PE32 || Section->Type == EFI_SECTION_TE) { 120 if (File->Type == EFI_FV_FILETYPE_SECURITY_CORE) { 121 if (IS_SECTION2 (Section)) { 122 *SecCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER2)); 123 } else { 124 *SecCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER)); 125 } 126 } else { 127 if (IS_SECTION2 (Section)) { 128 *PeiCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER2)); 129 } else { 130 *PeiCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER)); 131 } 132 } 133 break; 134 } 135 } 136 137 // 138 // Both SEC Core and PEI Core images found 139 // 140 if (*SecCoreImageBase != 0 && *PeiCoreImageBase != 0) { 141 return EFI_SUCCESS; 142 } 143 } 144 } 145 146 /** 147 Find and return Pei Core entry point. 148 149 It also find SEC and PEI Core file debug information. It will report them if 150 remote debug is enabled. 151 152 @param[in] BootFirmwareVolumePtr Point to the boot firmware volume. 153 @param[out] PeiCoreEntryPoint The entry point of the PEI core. 154 155 **/ 156 VOID 157 EFIAPI 158 FindAndReportEntryPoints ( 159 IN EFI_FIRMWARE_VOLUME_HEADER *BootFirmwareVolumePtr, 160 OUT EFI_PEI_CORE_ENTRY_POINT *PeiCoreEntryPoint 161 ) 162 { 163 EFI_STATUS Status; 164 EFI_PHYSICAL_ADDRESS SecCoreImageBase; 165 EFI_PHYSICAL_ADDRESS PeiCoreImageBase; 166 PE_COFF_LOADER_IMAGE_CONTEXT ImageContext; 167 168 // 169 // Find SEC Core and PEI Core image base 170 // 171 Status = FindImageBase (BootFirmwareVolumePtr, &SecCoreImageBase, &PeiCoreImageBase); 172 ASSERT_EFI_ERROR (Status); 173 174 ZeroMem ((VOID *) &ImageContext, sizeof (PE_COFF_LOADER_IMAGE_CONTEXT)); 175 // 176 // Report SEC Core debug information when remote debug is enabled 177 // 178 ImageContext.ImageAddress = SecCoreImageBase; 179 ImageContext.PdbPointer = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageContext.ImageAddress); 180 PeCoffLoaderRelocateImageExtraAction (&ImageContext); 181 182 // 183 // Report PEI Core debug information when remote debug is enabled 184 // 185 ImageContext.ImageAddress = PeiCoreImageBase; 186 ImageContext.PdbPointer = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageContext.ImageAddress); 187 PeCoffLoaderRelocateImageExtraAction (&ImageContext); 188 189 // 190 // Find PEI Core entry point 191 // 192 Status = PeCoffLoaderGetEntryPoint ((VOID *) (UINTN) PeiCoreImageBase, (VOID**) PeiCoreEntryPoint); 193 if (EFI_ERROR (Status)) { 194 *PeiCoreEntryPoint = 0; 195 } 196 197 return; 198 } 199 200
