| 1 | /** @file\r |
| 2 | Locate the entry point for the PEI Core\r |
| 3 | \r |
| 4 | Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>\r |
| 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| 6 | \r |
| 7 | **/\r |
| 8 | \r |
| 9 | #include <PiPei.h>\r |
| 10 | #include <Library/BaseLib.h>\r |
| 11 | #include <Library/PeCoffGetEntryPointLib.h>\r |
| 12 | \r |
| 13 | #include "SecMain.h"\r |
| 14 | \r |
| 15 | /**\r |
| 16 | Find core image base.\r |
| 17 | \r |
| 18 | @param BootFirmwareVolumePtr Point to the boot firmware volume.\r |
| 19 | @param SecCoreImageBase The base address of the SEC core image.\r |
| 20 | @param PeiCoreImageBase The base address of the PEI core image.\r |
| 21 | \r |
| 22 | **/\r |
| 23 | EFI_STATUS\r |
| 24 | EFIAPI\r |
| 25 | FindImageBase (\r |
| 26 | IN EFI_FIRMWARE_VOLUME_HEADER *BootFirmwareVolumePtr,\r |
| 27 | OUT EFI_PHYSICAL_ADDRESS *SecCoreImageBase,\r |
| 28 | OUT EFI_PHYSICAL_ADDRESS *PeiCoreImageBase\r |
| 29 | )\r |
| 30 | {\r |
| 31 | EFI_PHYSICAL_ADDRESS CurrentAddress;\r |
| 32 | EFI_PHYSICAL_ADDRESS EndOfFirmwareVolume;\r |
| 33 | EFI_FFS_FILE_HEADER *File;\r |
| 34 | UINT32 Size;\r |
| 35 | EFI_PHYSICAL_ADDRESS EndOfFile;\r |
| 36 | EFI_COMMON_SECTION_HEADER *Section;\r |
| 37 | EFI_PHYSICAL_ADDRESS EndOfSection;\r |
| 38 | \r |
| 39 | *SecCoreImageBase = 0;\r |
| 40 | *PeiCoreImageBase = 0;\r |
| 41 | \r |
| 42 | CurrentAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) BootFirmwareVolumePtr;\r |
| 43 | EndOfFirmwareVolume = CurrentAddress + BootFirmwareVolumePtr->FvLength;\r |
| 44 | \r |
| 45 | //\r |
| 46 | // Loop through the FFS files in the Boot Firmware Volume\r |
| 47 | //\r |
| 48 | for (EndOfFile = CurrentAddress + BootFirmwareVolumePtr->HeaderLength; ; ) {\r |
| 49 | \r |
| 50 | CurrentAddress = (EndOfFile + 7) & 0xfffffffffffffff8ULL;\r |
| 51 | if (CurrentAddress > EndOfFirmwareVolume) {\r |
| 52 | return EFI_NOT_FOUND;\r |
| 53 | }\r |
| 54 | \r |
| 55 | File = (EFI_FFS_FILE_HEADER*)(UINTN) CurrentAddress;\r |
| 56 | if (IS_FFS_FILE2 (File)) {\r |
| 57 | Size = FFS_FILE2_SIZE (File);\r |
| 58 | if (Size <= 0x00FFFFFF) {\r |
| 59 | return EFI_NOT_FOUND;\r |
| 60 | }\r |
| 61 | } else {\r |
| 62 | Size = FFS_FILE_SIZE (File);\r |
| 63 | if (Size < sizeof (EFI_FFS_FILE_HEADER)) {\r |
| 64 | return EFI_NOT_FOUND;\r |
| 65 | }\r |
| 66 | }\r |
| 67 | \r |
| 68 | EndOfFile = CurrentAddress + Size;\r |
| 69 | if (EndOfFile > EndOfFirmwareVolume) {\r |
| 70 | return EFI_NOT_FOUND;\r |
| 71 | }\r |
| 72 | \r |
| 73 | //\r |
| 74 | // Look for SEC Core / PEI Core files\r |
| 75 | //\r |
| 76 | if (File->Type != EFI_FV_FILETYPE_SECURITY_CORE &&\r |
| 77 | File->Type != EFI_FV_FILETYPE_PEI_CORE) {\r |
| 78 | continue;\r |
| 79 | }\r |
| 80 | \r |
| 81 | //\r |
| 82 | // Loop through the FFS file sections within the FFS file\r |
| 83 | //\r |
| 84 | if (IS_FFS_FILE2 (File)) {\r |
| 85 | EndOfSection = (EFI_PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) File + sizeof (EFI_FFS_FILE_HEADER2));\r |
| 86 | } else {\r |
| 87 | EndOfSection = (EFI_PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) File + sizeof (EFI_FFS_FILE_HEADER));\r |
| 88 | }\r |
| 89 | for (;;) {\r |
| 90 | CurrentAddress = (EndOfSection + 3) & 0xfffffffffffffffcULL;\r |
| 91 | Section = (EFI_COMMON_SECTION_HEADER*)(UINTN) CurrentAddress;\r |
| 92 | \r |
| 93 | if (IS_SECTION2 (Section)) {\r |
| 94 | Size = SECTION2_SIZE (Section);\r |
| 95 | if (Size <= 0x00FFFFFF) {\r |
| 96 | return EFI_NOT_FOUND;\r |
| 97 | }\r |
| 98 | } else {\r |
| 99 | Size = SECTION_SIZE (Section);\r |
| 100 | if (Size < sizeof (EFI_COMMON_SECTION_HEADER)) {\r |
| 101 | return EFI_NOT_FOUND;\r |
| 102 | }\r |
| 103 | }\r |
| 104 | \r |
| 105 | EndOfSection = CurrentAddress + Size;\r |
| 106 | if (EndOfSection > EndOfFile) {\r |
| 107 | return EFI_NOT_FOUND;\r |
| 108 | }\r |
| 109 | \r |
| 110 | //\r |
| 111 | // Look for executable sections\r |
| 112 | //\r |
| 113 | if (Section->Type == EFI_SECTION_PE32 || Section->Type == EFI_SECTION_TE) {\r |
| 114 | if (File->Type == EFI_FV_FILETYPE_SECURITY_CORE) {\r |
| 115 | if (IS_SECTION2 (Section)) {\r |
| 116 | *SecCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER2));\r |
| 117 | } else {\r |
| 118 | *SecCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER));\r |
| 119 | }\r |
| 120 | } else {\r |
| 121 | if (IS_SECTION2 (Section)) {\r |
| 122 | *PeiCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER2));\r |
| 123 | } else {\r |
| 124 | *PeiCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER));\r |
| 125 | }\r |
| 126 | }\r |
| 127 | break;\r |
| 128 | }\r |
| 129 | }\r |
| 130 | \r |
| 131 | //\r |
| 132 | // Both SEC Core and PEI Core images found\r |
| 133 | //\r |
| 134 | if (*SecCoreImageBase != 0 && *PeiCoreImageBase != 0) {\r |
| 135 | return EFI_SUCCESS;\r |
| 136 | }\r |
| 137 | }\r |
| 138 | }\r |
| 139 | \r |
| 140 | /**\r |
| 141 | Find and return Pei Core entry point.\r |
| 142 | \r |
| 143 | It also find SEC and PEI Core file debug information. It will report them if\r |
| 144 | remote debug is enabled.\r |
| 145 | \r |
| 146 | @param BootFirmwareVolumePtr Point to the boot firmware volume.\r |
| 147 | @param PeiCoreEntryPoint The entry point of the PEI core.\r |
| 148 | \r |
| 149 | **/\r |
| 150 | VOID\r |
| 151 | EFIAPI\r |
| 152 | FindAndReportEntryPoints (\r |
| 153 | IN EFI_FIRMWARE_VOLUME_HEADER *BootFirmwareVolumePtr,\r |
| 154 | OUT EFI_PEI_CORE_ENTRY_POINT *PeiCoreEntryPoint\r |
| 155 | )\r |
| 156 | {\r |
| 157 | EFI_STATUS Status;\r |
| 158 | EFI_PHYSICAL_ADDRESS SecCoreImageBase;\r |
| 159 | EFI_PHYSICAL_ADDRESS PeiCoreImageBase;\r |
| 160 | PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;\r |
| 161 | \r |
| 162 | //\r |
| 163 | // Find SEC Core and PEI Core image base\r |
| 164 | //\r |
| 165 | Status = FindImageBase (BootFirmwareVolumePtr, &SecCoreImageBase, &PeiCoreImageBase);\r |
| 166 | ASSERT_EFI_ERROR (Status);\r |
| 167 | \r |
| 168 | ZeroMem ((VOID *) &ImageContext, sizeof (PE_COFF_LOADER_IMAGE_CONTEXT));\r |
| 169 | //\r |
| 170 | // Report SEC Core debug information when remote debug is enabled\r |
| 171 | //\r |
| 172 | ImageContext.ImageAddress = SecCoreImageBase;\r |
| 173 | ImageContext.PdbPointer = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageContext.ImageAddress);\r |
| 174 | PeCoffLoaderRelocateImageExtraAction (&ImageContext);\r |
| 175 | \r |
| 176 | //\r |
| 177 | // Report PEI Core debug information when remote debug is enabled\r |
| 178 | //\r |
| 179 | ImageContext.ImageAddress = PeiCoreImageBase;\r |
| 180 | ImageContext.PdbPointer = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageContext.ImageAddress);\r |
| 181 | PeCoffLoaderRelocateImageExtraAction (&ImageContext);\r |
| 182 | \r |
| 183 | //\r |
| 184 | // Find PEI Core entry point\r |
| 185 | //\r |
| 186 | Status = PeCoffLoaderGetEntryPoint ((VOID *) (UINTN) PeiCoreImageBase, (VOID**) PeiCoreEntryPoint);\r |
| 187 | if (EFI_ERROR (Status)) {\r |
| 188 | *PeiCoreEntryPoint = 0;\r |
| 189 | }\r |
| 190 | \r |
| 191 | return;\r |
| 192 | }\r |
| 193 | \r |