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1 | /** @file\r | |
2 | Provides the services to get the entry point to a PE/COFF image that has either been \r | |
3 | loaded into memory or is executing at it's linked address.\r | |
4 | \r | |
5 | Copyright (c) 2006 - 2008, Intel Corporation<BR>\r | |
6 | Portions copyright (c) 2008-2009 Apple Inc. All rights reserved.<BR>\r | |
7 | All rights reserved. This program and the accompanying materials\r | |
8 | are licensed and made available under the terms and conditions of the BSD License\r | |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | \r | |
18 | #include <Base.h>\r | |
19 | \r | |
20 | #include <Library/PeCoffGetEntryPointLib.h>\r | |
21 | #include <Library/DebugLib.h>\r | |
22 | \r | |
23 | #include <IndustryStandard/PeImage.h>\r | |
24 | \r | |
25 | /**\r | |
26 | Retrieves and returns a pointer to the entry point to a PE/COFF image that has been loaded\r | |
27 | into system memory with the PE/COFF Loader Library functions.\r | |
28 | \r | |
29 | Retrieves the entry point to the PE/COFF image specified by Pe32Data and returns this entry\r | |
30 | point in EntryPoint. If the entry point could not be retrieved from the PE/COFF image, then\r | |
31 | return RETURN_INVALID_PARAMETER. Otherwise return RETURN_SUCCESS.\r | |
32 | If Pe32Data is NULL, then ASSERT().\r | |
33 | If EntryPoint is NULL, then ASSERT().\r | |
34 | \r | |
35 | @param Pe32Data Pointer to the PE/COFF image that is loaded in system memory.\r | |
36 | @param EntryPoint Pointer to entry point to the PE/COFF image to return.\r | |
37 | \r | |
38 | @retval RETURN_SUCCESS EntryPoint was returned.\r | |
39 | @retval RETURN_INVALID_PARAMETER The entry point could not be found in the PE/COFF image.\r | |
40 | \r | |
41 | **/\r | |
42 | RETURN_STATUS\r | |
43 | EFIAPI\r | |
44 | PeCoffLoaderGetEntryPoint (\r | |
45 | IN VOID *Pe32Data,\r | |
46 | OUT VOID **EntryPoint\r | |
47 | )\r | |
48 | {\r | |
49 | EFI_IMAGE_DOS_HEADER *DosHdr;\r | |
50 | EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;\r | |
51 | \r | |
52 | ASSERT (Pe32Data != NULL);\r | |
53 | ASSERT (EntryPoint != NULL);\r | |
54 | \r | |
55 | DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data;\r | |
56 | if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {\r | |
57 | //\r | |
58 | // DOS image header is present, so read the PE header after the DOS image header.\r | |
59 | //\r | |
60 | Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));\r | |
61 | } else {\r | |
62 | //\r | |
63 | // DOS image header is not present, so PE header is at the image base.\r | |
64 | //\r | |
65 | Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;\r | |
66 | }\r | |
67 | \r | |
68 | //\r | |
69 | // Calculate the entry point relative to the start of the image.\r | |
70 | // AddressOfEntryPoint is common for PE32 & PE32+\r | |
71 | //\r | |
72 | if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {\r | |
73 | *EntryPoint = (VOID *)((UINTN)Pe32Data + (UINTN)(Hdr.Te->AddressOfEntryPoint & 0x0ffffffff) + sizeof(EFI_TE_IMAGE_HEADER) - Hdr.Te->StrippedSize);\r | |
74 | return RETURN_SUCCESS;\r | |
75 | } else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {\r | |
76 | *EntryPoint = (VOID *)((UINTN)Pe32Data + (UINTN)(Hdr.Pe32->OptionalHeader.AddressOfEntryPoint & 0x0ffffffff));\r | |
77 | return RETURN_SUCCESS;\r | |
78 | }\r | |
79 | \r | |
80 | return RETURN_UNSUPPORTED;\r | |
81 | }\r | |
82 | \r | |
83 | \r | |
84 | /**\r | |
85 | Returns the machine type of a PE/COFF image.\r | |
86 | \r | |
87 | Returns the machine type from the PE/COFF image specified by Pe32Data.\r | |
88 | If Pe32Data is NULL, then ASSERT().\r | |
89 | \r | |
90 | @param Pe32Data Pointer to the PE/COFF image that is loaded in system\r | |
91 | memory.\r | |
92 | \r | |
93 | @return Machine type or zero if not a valid iamge.\r | |
94 | \r | |
95 | **/\r | |
96 | UINT16\r | |
97 | EFIAPI\r | |
98 | PeCoffLoaderGetMachineType (\r | |
99 | IN VOID *Pe32Data\r | |
100 | )\r | |
101 | {\r | |
102 | EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;\r | |
103 | EFI_IMAGE_DOS_HEADER *DosHdr;\r | |
104 | \r | |
105 | ASSERT (Pe32Data != NULL);\r | |
106 | \r | |
107 | DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data;\r | |
108 | if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {\r | |
109 | //\r | |
110 | // DOS image header is present, so read the PE header after the DOS image header.\r | |
111 | //\r | |
112 | Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));\r | |
113 | } else {\r | |
114 | //\r | |
115 | // DOS image header is not present, so PE header is at the image base.\r | |
116 | //\r | |
117 | Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;\r | |
118 | }\r | |
119 | \r | |
120 | if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {\r | |
121 | return Hdr.Te->Machine;\r | |
122 | } else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {\r | |
123 | return Hdr.Pe32->FileHeader.Machine;\r | |
124 | }\r | |
125 | \r | |
126 | return 0x0000;\r | |
127 | }\r | |
128 | \r | |
129 | /**\r | |
130 | Returns a pointer to the PDB file name for a PE/COFF image that has been\r | |
131 | loaded into system memory with the PE/COFF Loader Library functions. \r | |
132 | \r | |
133 | Returns the PDB file name for the PE/COFF image specified by Pe32Data. If\r | |
134 | the PE/COFF image specified by Pe32Data is not a valid, then NULL is\r | |
135 | returned. If the PE/COFF image specified by Pe32Data does not contain a\r | |
136 | debug directory entry, then NULL is returned. If the debug directory entry\r | |
137 | in the PE/COFF image specified by Pe32Data does not contain a PDB file name,\r | |
138 | then NULL is returned.\r | |
139 | If Pe32Data is NULL, then ASSERT().\r | |
140 | \r | |
141 | @param Pe32Data Pointer to the PE/COFF image that is loaded in system\r | |
142 | memory.\r | |
143 | \r | |
144 | @return The PDB file name for the PE/COFF image specified by Pe32Data or NULL\r | |
145 | if it cannot be retrieved.\r | |
146 | \r | |
147 | **/\r | |
148 | VOID *\r | |
149 | EFIAPI\r | |
150 | PeCoffLoaderGetPdbPointer (\r | |
151 | IN VOID *Pe32Data\r | |
152 | )\r | |
153 | {\r | |
154 | EFI_IMAGE_DOS_HEADER *DosHdr;\r | |
155 | EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;\r | |
156 | EFI_IMAGE_DATA_DIRECTORY *DirectoryEntry;\r | |
157 | EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *DebugEntry;\r | |
158 | UINTN DirCount;\r | |
159 | VOID *CodeViewEntryPointer;\r | |
160 | INTN TEImageAdjust;\r | |
161 | UINT32 NumberOfRvaAndSizes;\r | |
162 | UINT16 Magic;\r | |
163 | \r | |
164 | ASSERT (Pe32Data != NULL);\r | |
165 | \r | |
166 | TEImageAdjust = 0;\r | |
167 | DirectoryEntry = NULL;\r | |
168 | DebugEntry = NULL;\r | |
169 | NumberOfRvaAndSizes = 0;\r | |
170 | \r | |
171 | DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data;\r | |
172 | if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {\r | |
173 | //\r | |
174 | // DOS image header is present, so read the PE header after the DOS image header.\r | |
175 | //\r | |
176 | Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));\r | |
177 | } else {\r | |
178 | //\r | |
179 | // DOS image header is not present, so PE header is at the image base.\r | |
180 | //\r | |
181 | Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;\r | |
182 | }\r | |
183 | \r | |
184 | if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {\r | |
185 | if (Hdr.Te->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress != 0) {\r | |
186 | DirectoryEntry = &Hdr.Te->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_DEBUG];\r | |
187 | TEImageAdjust = sizeof (EFI_TE_IMAGE_HEADER) - Hdr.Te->StrippedSize;\r | |
188 | DebugEntry = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *)((UINTN) Hdr.Te +\r | |
189 | Hdr.Te->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress +\r | |
190 | TEImageAdjust);\r | |
191 | }\r | |
192 | } else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {\r | |
193 | //\r | |
194 | // NOTE: We use Machine field to identify PE32/PE32+, instead of Magic.\r | |
195 | // It is due to backward-compatibility, for some system might\r | |
196 | // generate PE32+ image with PE32 Magic.\r | |
197 | //\r | |
198 | switch (Hdr.Pe32->FileHeader.Machine) {\r | |
199 | case IMAGE_FILE_MACHINE_I386:\r | |
200 | //\r | |
201 | // Assume PE32 image with IA32 Machine field.\r | |
202 | //\r | |
203 | Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;\r | |
204 | break;\r | |
205 | case IMAGE_FILE_MACHINE_X64:\r | |
206 | case IMAGE_FILE_MACHINE_IA64:\r | |
207 | //\r | |
208 | // Assume PE32+ image with x64 or IA64 Machine field\r | |
209 | //\r | |
210 | Magic = EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC;\r | |
211 | break;\r | |
212 | default:\r | |
213 | //\r | |
214 | // For unknow Machine field, use Magic in optional Header\r | |
215 | //\r | |
216 | Magic = Hdr.Pe32->OptionalHeader.Magic;\r | |
217 | }\r | |
218 | \r | |
219 | if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {\r | |
220 | //\r | |
221 | // Use PE32 offset get Debug Directory Entry\r | |
222 | //\r | |
223 | NumberOfRvaAndSizes = Hdr.Pe32->OptionalHeader.NumberOfRvaAndSizes;\r | |
224 | DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *)&(Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG]);\r | |
225 | DebugEntry = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *) ((UINTN) Pe32Data + DirectoryEntry->VirtualAddress);\r | |
226 | } else if (Hdr.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC) {\r | |
227 | //\r | |
228 | // Use PE32+ offset get Debug Directory Entry\r | |
229 | //\r | |
230 | NumberOfRvaAndSizes = Hdr.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes;\r | |
231 | DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *)&(Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG]);\r | |
232 | DebugEntry = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *) ((UINTN) Pe32Data + DirectoryEntry->VirtualAddress);\r | |
233 | }\r | |
234 | \r | |
235 | if (NumberOfRvaAndSizes <= EFI_IMAGE_DIRECTORY_ENTRY_DEBUG) {\r | |
236 | DirectoryEntry = NULL;\r | |
237 | DebugEntry = NULL;\r | |
238 | }\r | |
239 | } else {\r | |
240 | return NULL;\r | |
241 | }\r | |
242 | \r | |
243 | if (DebugEntry == NULL || DirectoryEntry == NULL) {\r | |
244 | return NULL;\r | |
245 | }\r | |
246 | \r | |
247 | //\r | |
248 | // Scan the directory to find the debug entry.\r | |
249 | // \r | |
250 | for (DirCount = 0; DirCount < DirectoryEntry->Size; DirCount += sizeof (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY), DebugEntry++) {\r | |
251 | if (DebugEntry->Type == EFI_IMAGE_DEBUG_TYPE_CODEVIEW) {\r | |
252 | if (DebugEntry->SizeOfData > 0) {\r | |
253 | CodeViewEntryPointer = (VOID *) ((UINTN) DebugEntry->RVA + ((UINTN)Pe32Data) + (UINTN)TEImageAdjust);\r | |
254 | switch (* (UINT32 *) CodeViewEntryPointer) {\r | |
255 | case CODEVIEW_SIGNATURE_NB10:\r | |
256 | return (VOID *) ((CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY));\r | |
257 | case CODEVIEW_SIGNATURE_RSDS:\r | |
258 | return (VOID *) ((CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_RSDS_ENTRY));\r | |
259 | case CODEVIEW_SIGNATURE_MTOC:\r | |
260 | return (VOID *) ((CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_MTOC_ENTRY));\r | |
261 | default:\r | |
262 | break;\r | |
263 | }\r | |
264 | }\r | |
265 | }\r | |
266 | }\r | |
267 | \r | |
268 | return NULL;\r | |
269 | }\r | |
270 | \r | |
271 | \r |