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1921695e MK |
1 | /** @file\r |
2 | Locate the entry point for the PEI Core\r | |
3 | \r | |
08283b96 | 4 | Copyright (c) 2008 - 2019, Intel Corporation. All rights reserved.<BR>\r |
0acd8697 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
1921695e MK |
6 | \r |
7 | **/\r | |
8 | \r | |
9 | #include <PiPei.h>\r | |
1921695e MK |
10 | \r |
11 | #include "SecMain.h"\r | |
12 | \r | |
13 | /**\r | |
14 | Find core image base.\r | |
15 | \r | |
08283b96 CC |
16 | @param FirmwareVolumePtr Point to the firmware volume for finding core image.\r |
17 | @param FileType The FileType for searching, either SecCore or PeiCore.\r | |
18 | @param CoreImageBase The base address of the core image.\r | |
1921695e MK |
19 | \r |
20 | **/\r | |
21 | EFI_STATUS\r | |
22 | EFIAPI\r | |
23 | FindImageBase (\r | |
08283b96 CC |
24 | IN EFI_FIRMWARE_VOLUME_HEADER *FirmwareVolumePtr,\r |
25 | IN EFI_FV_FILETYPE FileType,\r | |
26 | OUT EFI_PHYSICAL_ADDRESS *CoreImageBase\r | |
1921695e MK |
27 | )\r |
28 | {\r | |
29 | EFI_PHYSICAL_ADDRESS CurrentAddress;\r | |
30 | EFI_PHYSICAL_ADDRESS EndOfFirmwareVolume;\r | |
31 | EFI_FFS_FILE_HEADER *File;\r | |
32 | UINT32 Size;\r | |
33 | EFI_PHYSICAL_ADDRESS EndOfFile;\r | |
34 | EFI_COMMON_SECTION_HEADER *Section;\r | |
35 | EFI_PHYSICAL_ADDRESS EndOfSection;\r | |
36 | \r | |
08283b96 | 37 | *CoreImageBase = 0;\r |
1921695e | 38 | \r |
08283b96 CC |
39 | CurrentAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) FirmwareVolumePtr;\r |
40 | EndOfFirmwareVolume = CurrentAddress + FirmwareVolumePtr->FvLength;\r | |
1921695e MK |
41 | \r |
42 | //\r | |
43 | // Loop through the FFS files in the Boot Firmware Volume\r | |
44 | //\r | |
08283b96 | 45 | for (EndOfFile = CurrentAddress + FirmwareVolumePtr->HeaderLength; ; ) {\r |
1921695e MK |
46 | \r |
47 | CurrentAddress = (EndOfFile + 7) & 0xfffffffffffffff8ULL;\r | |
48 | if (CurrentAddress > EndOfFirmwareVolume) {\r | |
49 | return EFI_NOT_FOUND;\r | |
50 | }\r | |
51 | \r | |
52 | File = (EFI_FFS_FILE_HEADER*)(UINTN) CurrentAddress;\r | |
53 | if (IS_FFS_FILE2 (File)) {\r | |
54 | Size = FFS_FILE2_SIZE (File);\r | |
55 | if (Size <= 0x00FFFFFF) {\r | |
56 | return EFI_NOT_FOUND;\r | |
57 | }\r | |
58 | } else {\r | |
59 | Size = FFS_FILE_SIZE (File);\r | |
60 | if (Size < sizeof (EFI_FFS_FILE_HEADER)) {\r | |
61 | return EFI_NOT_FOUND;\r | |
62 | }\r | |
63 | }\r | |
64 | \r | |
65 | EndOfFile = CurrentAddress + Size;\r | |
66 | if (EndOfFile > EndOfFirmwareVolume) {\r | |
67 | return EFI_NOT_FOUND;\r | |
68 | }\r | |
69 | \r | |
70 | //\r | |
08283b96 | 71 | // Look for particular Core file (either SEC Core or PEI Core)\r |
1921695e | 72 | //\r |
08283b96 | 73 | if (File->Type != FileType) {\r |
1921695e MK |
74 | continue;\r |
75 | }\r | |
76 | \r | |
77 | //\r | |
78 | // Loop through the FFS file sections within the FFS file\r | |
79 | //\r | |
80 | if (IS_FFS_FILE2 (File)) {\r | |
81 | EndOfSection = (EFI_PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) File + sizeof (EFI_FFS_FILE_HEADER2));\r | |
82 | } else {\r | |
83 | EndOfSection = (EFI_PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) File + sizeof (EFI_FFS_FILE_HEADER));\r | |
84 | }\r | |
85 | for (;;) {\r | |
86 | CurrentAddress = (EndOfSection + 3) & 0xfffffffffffffffcULL;\r | |
87 | Section = (EFI_COMMON_SECTION_HEADER*)(UINTN) CurrentAddress;\r | |
88 | \r | |
89 | if (IS_SECTION2 (Section)) {\r | |
90 | Size = SECTION2_SIZE (Section);\r | |
91 | if (Size <= 0x00FFFFFF) {\r | |
92 | return EFI_NOT_FOUND;\r | |
93 | }\r | |
94 | } else {\r | |
95 | Size = SECTION_SIZE (Section);\r | |
96 | if (Size < sizeof (EFI_COMMON_SECTION_HEADER)) {\r | |
97 | return EFI_NOT_FOUND;\r | |
98 | }\r | |
99 | }\r | |
100 | \r | |
101 | EndOfSection = CurrentAddress + Size;\r | |
102 | if (EndOfSection > EndOfFile) {\r | |
103 | return EFI_NOT_FOUND;\r | |
104 | }\r | |
105 | \r | |
106 | //\r | |
107 | // Look for executable sections\r | |
108 | //\r | |
109 | if (Section->Type == EFI_SECTION_PE32 || Section->Type == EFI_SECTION_TE) {\r | |
08283b96 | 110 | if (File->Type == FileType) {\r |
1921695e | 111 | if (IS_SECTION2 (Section)) {\r |
08283b96 | 112 | *CoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER2));\r |
1921695e | 113 | } else {\r |
08283b96 | 114 | *CoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER));\r |
1921695e MK |
115 | }\r |
116 | }\r | |
117 | break;\r | |
118 | }\r | |
119 | }\r | |
120 | \r | |
121 | //\r | |
08283b96 | 122 | // Either SEC Core or PEI Core images found\r |
1921695e | 123 | //\r |
08283b96 | 124 | if (*CoreImageBase != 0) {\r |
1921695e MK |
125 | return EFI_SUCCESS;\r |
126 | }\r | |
127 | }\r | |
128 | }\r | |
129 | \r | |
130 | /**\r | |
131 | Find and return Pei Core entry point.\r | |
132 | \r | |
133 | It also find SEC and PEI Core file debug information. It will report them if\r | |
134 | remote debug is enabled.\r | |
135 | \r | |
08283b96 CC |
136 | @param SecCoreFirmwareVolumePtr Point to the firmware volume for finding SecCore.\r |
137 | @param PeiCoreFirmwareVolumePtr Point to the firmware volume for finding PeiCore.\r | |
1921695e MK |
138 | @param PeiCoreEntryPoint The entry point of the PEI core.\r |
139 | \r | |
140 | **/\r | |
141 | VOID\r | |
142 | EFIAPI\r | |
143 | FindAndReportEntryPoints (\r | |
08283b96 CC |
144 | IN EFI_FIRMWARE_VOLUME_HEADER *SecCoreFirmwareVolumePtr,\r |
145 | IN EFI_FIRMWARE_VOLUME_HEADER *PeiCoreFirmwareVolumePtr,\r | |
1921695e MK |
146 | OUT EFI_PEI_CORE_ENTRY_POINT *PeiCoreEntryPoint\r |
147 | )\r | |
148 | {\r | |
149 | EFI_STATUS Status;\r | |
150 | EFI_PHYSICAL_ADDRESS SecCoreImageBase;\r | |
151 | EFI_PHYSICAL_ADDRESS PeiCoreImageBase;\r | |
152 | PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;\r | |
153 | \r | |
154 | //\r | |
08283b96 | 155 | // Find SEC Core image base\r |
1921695e | 156 | //\r |
08283b96 | 157 | Status = FindImageBase (SecCoreFirmwareVolumePtr, EFI_FV_FILETYPE_SECURITY_CORE, &SecCoreImageBase);\r |
1921695e MK |
158 | ASSERT_EFI_ERROR (Status);\r |
159 | \r | |
160 | ZeroMem ((VOID *) &ImageContext, sizeof (PE_COFF_LOADER_IMAGE_CONTEXT));\r | |
161 | //\r | |
162 | // Report SEC Core debug information when remote debug is enabled\r | |
163 | //\r | |
164 | ImageContext.ImageAddress = SecCoreImageBase;\r | |
165 | ImageContext.PdbPointer = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageContext.ImageAddress);\r | |
166 | PeCoffLoaderRelocateImageExtraAction (&ImageContext);\r | |
167 | \r | |
08283b96 CC |
168 | //\r |
169 | // Find PEI Core image base\r | |
170 | //\r | |
171 | Status = FindImageBase (PeiCoreFirmwareVolumePtr, EFI_FV_FILETYPE_PEI_CORE, &PeiCoreImageBase);\r | |
172 | ASSERT_EFI_ERROR (Status);\r | |
173 | \r | |
1921695e MK |
174 | //\r |
175 | // Report PEI Core debug information when remote debug is enabled\r | |
176 | //\r | |
177 | ImageContext.ImageAddress = PeiCoreImageBase;\r | |
178 | ImageContext.PdbPointer = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageContext.ImageAddress);\r | |
179 | PeCoffLoaderRelocateImageExtraAction (&ImageContext);\r | |
180 | \r | |
181 | //\r | |
182 | // Find PEI Core entry point\r | |
183 | //\r | |
184 | Status = PeCoffLoaderGetEntryPoint ((VOID *) (UINTN) PeiCoreImageBase, (VOID**) PeiCoreEntryPoint);\r | |
185 | if (EFI_ERROR (Status)) {\r | |
186 | *PeiCoreEntryPoint = 0;\r | |
187 | }\r | |
188 | \r | |
189 | return;\r | |
190 | }\r |