+++ /dev/null
-/** @file\r
- Tiano PE/COFF loader.\r
-\r
- Copyright (c) 2006 - 2007, Intel Corporation<BR>\r
- All rights reserved. This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
- Module Name: PeCoffGetEntryPoint.c\r
-\r
-**/\r
-\r
-\r
-\r
-/**\r
- Retrieves and returns a pointer to the entry point to a PE/COFF image that has been loaded\r
- into system memory with the PE/COFF Loader Library functions.\r
-\r
- Retrieves the entry point to the PE/COFF image specified by Pe32Data and returns this entry\r
- point in EntryPoint. If the entry point could not be retrieved from the PE/COFF image, then\r
- return RETURN_INVALID_PARAMETER. Otherwise return RETURN_SUCCESS.\r
- If Pe32Data is NULL, then ASSERT().\r
- If EntryPoint is NULL, then ASSERT().\r
-\r
- @param Pe32Data Pointer to the PE/COFF image that is loaded in system memory.\r
- @param EntryPoint Pointer to entry point to the PE/COFF image to return.\r
-\r
- @retval RETURN_SUCCESS EntryPoint was returned.\r
- @retval RETURN_INVALID_PARAMETER The entry point could not be found in the PE/COFF image.\r
-\r
-**/\r
-RETURN_STATUS\r
-EFIAPI\r
-PeCoffLoaderGetEntryPoint (\r
- IN VOID *Pe32Data,\r
- OUT VOID **EntryPoint\r
- )\r
-{\r
- EFI_IMAGE_DOS_HEADER *DosHeader;\r
- EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Header;\r
-\r
- ASSERT (Pe32Data != NULL);\r
- ASSERT (EntryPoint != NULL);\r
-\r
- DosHeader = (EFI_IMAGE_DOS_HEADER *)Pe32Data;\r
- if (DosHeader->e_magic == EFI_IMAGE_DOS_SIGNATURE) {\r
- //\r
- // DOS image header is present, so read the PE header after the DOS image header.\r
- //\r
- Header.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHeader->e_lfanew) & 0x0ffff));\r
- } else {\r
- //\r
- // DOS image header is not present, so PE header is at the image base.\r
- //\r
- Header.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;\r
- }\r
-\r
- //\r
- // Calculate the entry point relative to the start of the image. \r
- // AddressOfEntryPoint is common for PE32 & PE32+\r
- //\r
- *EntryPoint = (VOID *)((UINTN)Pe32Data + (UINTN)(Header.Pe32->OptionalHeader.AddressOfEntryPoint & 0x0ffffffff));\r
- return RETURN_SUCCESS;\r
-}\r
-\r
-\r
-/**\r
- Returns the machine type of a PE/COFF image.\r
-\r
- Returns the machine type from the PE/COFF image specified by Pe32Data.\r
- If Pe32Data is NULL, then ASSERT().\r
-\r
- @param Pe32Data Pointer to the PE/COFF image that is loaded in system\r
- memory.\r
-\r
- @return Machine type or zero if not a valid iamge.\r
-\r
-**/\r
-UINT16\r
-EFIAPI\r
-PeCoffLoaderGetMachineType (\r
- IN VOID *Pe32Data\r
- )\r
-{\r
- EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;\r
- EFI_IMAGE_DOS_HEADER *DosHdr;\r
-\r
- DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data;\r
- if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {\r
- Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN)Pe32Data + DosHdr->e_lfanew);\r
- } else {\r
- Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN)Pe32Data);\r
- }\r
-\r
- if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {\r
- return Hdr.Pe32->FileHeader.Machine;\r
- }\r
-\r
- return 0x0000;\r
-}\r
-\r
-/**\r
- Returns a pointer to the PDB file name for a PE/COFF image that has been\r
- loaded into system memory with the PE/COFF Loader Library functions. \r
-\r
- Returns the PDB file name for the PE/COFF image specified by Pe32Data. If\r
- the PE/COFF image specified by Pe32Data is not a valid, then NULL is\r
- returned. If the PE/COFF image specified by Pe32Data does not contain a\r
- debug directory entry, then NULL is returned. If the debug directory entry\r
- in the PE/COFF image specified by Pe32Data does not contain a PDB file name,\r
- then NULL is returned.\r
- If Pe32Data is NULL, then ASSERT().\r
-\r
- @param Pe32Data Pointer to the PE/COFF image that is loaded in system\r
- memory.\r
-\r
- @return The PDB file name for the PE/COFF image specified by Pe32Data or NULL\r
- if it cannot be retrieved.\r
-\r
-**/\r
-VOID *\r
-EFIAPI\r
-PeCoffLoaderGetPdbPointer (\r
- IN VOID *Pe32Data\r
- )\r
-{\r
- EFI_IMAGE_DOS_HEADER *DosHeader;\r
- EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;\r
- EFI_IMAGE_DATA_DIRECTORY *DirectoryEntry;\r
- EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *DebugEntry;\r
- UINTN DirCount;\r
- VOID *CodeViewEntryPointer;\r
- INTN TEImageAdjust;\r
- UINT32 NumberOfRvaAndSizes;\r
- UINT16 Magic;\r
- \r
- ASSERT (Pe32Data != NULL);\r
-\r
- TEImageAdjust = 0;\r
- DirectoryEntry = NULL;\r
- DebugEntry = NULL;\r
- NumberOfRvaAndSizes = 0;\r
-\r
- DosHeader = (EFI_IMAGE_DOS_HEADER *)Pe32Data;\r
- if (DosHeader->e_magic == EFI_IMAGE_DOS_SIGNATURE) {\r
- //\r
- // DOS image header is present, so read the PE header after the DOS image header.\r
- //\r
- Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHeader->e_lfanew) & 0x0ffff));\r
- } else {\r
- //\r
- // DOS image header is not present, so PE header is at the image base.\r
- //\r
- Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;\r
- }\r
-\r
- if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {\r
- if (Hdr.Te->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress != 0) {\r
- DirectoryEntry = &Hdr.Te->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_DEBUG];\r
- TEImageAdjust = sizeof (EFI_TE_IMAGE_HEADER) - Hdr.Te->StrippedSize;\r
- DebugEntry = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *)((UINTN) Hdr.Te +\r
- Hdr.Te->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress +\r
- TEImageAdjust);\r
- }\r
- } else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {\r
- //\r
- // NOTE: We use Machine field to identify PE32/PE32+, instead of Magic.\r
- // It is due to backward-compatibility, for some system might\r
- // generate PE32+ image with PE32 Magic.\r
- //\r
- switch (Hdr.Pe32->FileHeader.Machine) {\r
- case EFI_IMAGE_MACHINE_IA32:\r
- //\r
- // Assume PE32 image with IA32 Machine field.\r
- //\r
- Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;\r
- break;\r
- case EFI_IMAGE_MACHINE_X64:\r
- case EFI_IMAGE_MACHINE_IPF:\r
- //\r
- // Assume PE32+ image with X64 or IPF Machine field\r
- //\r
- Magic = EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC;\r
- break;\r
- default:\r
- //\r
- // For unknow Machine field, use Magic in optional Header\r
- //\r
- Magic = Hdr.Pe32->OptionalHeader.Magic;\r
- }\r
-\r
- if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {\r
- // \r
- // Use PE32 offset get Debug Directory Entry\r
- //\r
- NumberOfRvaAndSizes = Hdr.Pe32->OptionalHeader.NumberOfRvaAndSizes;\r
- DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *)&(Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG]);\r
- DebugEntry = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *) ((UINTN) Pe32Data + DirectoryEntry->VirtualAddress);\r
- } else if (Hdr.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC) {\r
- // \r
- // Use PE32+ offset get Debug Directory Entry\r
- //\r
- NumberOfRvaAndSizes = Hdr.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes;\r
- DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *)&(Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG]);\r
- DebugEntry = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *) ((UINTN) Pe32Data + DirectoryEntry->VirtualAddress);\r
- }\r
-\r
- if (NumberOfRvaAndSizes <= EFI_IMAGE_DIRECTORY_ENTRY_DEBUG) {\r
- DirectoryEntry = NULL;\r
- DebugEntry = NULL;\r
- }\r
- } else {\r
- return NULL;\r
- }\r
-\r
- if (DebugEntry == NULL || DirectoryEntry == NULL) {\r
- return NULL;\r
- }\r
-\r
- for (DirCount = 0; DirCount < DirectoryEntry->Size; DirCount++, DebugEntry++) {\r
- if (DebugEntry->Type == EFI_IMAGE_DEBUG_TYPE_CODEVIEW) {\r
- if (DebugEntry->SizeOfData > 0) {\r
- CodeViewEntryPointer = (VOID *) ((UINTN) DebugEntry->RVA + ((UINTN)Pe32Data) + (UINTN)TEImageAdjust);\r
- switch (* (UINT32 *) CodeViewEntryPointer) {\r
- case CODEVIEW_SIGNATURE_NB10:\r
- return (VOID *) ((CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY));\r
- case CODEVIEW_SIGNATURE_RSDS:\r
- return (VOID *) ((CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_RSDS_ENTRY));\r
- default:\r
- break;\r
- }\r
- }\r
- }\r
- }\r
-\r
- return NULL;\r
-}\r
-\r
-\r
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