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a33a2f62 JY |
1 | /** @file\r |
2 | Locate the entry point for the PEI Core\r | |
3 | \r | |
4 | Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>\r | |
19486360 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
a33a2f62 JY |
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[in] BootFirmwareVolumePtr Point to the boot firmware volume.\r | |
19 | @param[out] SecCoreImageBase The base address of the SEC core image.\r | |
20 | @param[out] 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 | |
b9ca25cb | 143 | It also find SEC and PEI Core file debug information. It will report them if\r |
a33a2f62 JY |
144 | remote debug is enabled.\r |
145 | \r | |
146 | @param[in] BootFirmwareVolumePtr Point to the boot firmware volume.\r | |
147 | @param[out] 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 |