reactos操作系统实现(82)

@H_403_1@

在I/O管理最后阶段，就是加载系统所有动态连接库，比如加载NTDLL动态连接库，具体实现代码如下：@H_403_1@

#001 NTSTATUS@H_403_1@

#002 NTAPI@H_403_1@

#003 PsLocateSystemDll(VOID)@H_403_1@

#004 {@H_403_1@

#005 OBJECT_ATTRIBUTES ObjectAttributes;@H_403_1@

#006 IO_STATUS_BLOCK IoStatusBlock;@H_403_1@

#007 HANDLE FileHandle,SectionHandle;@H_403_1@

#008 NTSTATUS Status;@H_403_1@

#009 ULONG_PTR HardErrorParameters;@H_403_1@

#010 ULONG HardErrorResponse;@H_403_1@

#011 @H_403_1@

@H_403_1@

加载NTDLL动态连接库。@H_403_1@

#012 /* Locate and open NTDLL to determine ImageBase and LdrStartup */@H_403_1@

#013 InitializeObjectAttributes(&ObjectAttributes,@H_403_1@

#014 &PsNtDllPathName,@H_403_1@

#015 0,@H_403_1@

#016 NULL,@H_403_1@

#017 NULL);@H_403_1@

@H_403_1@

打开NTDLL动态连接库文件。@H_403_1@

#018 Status = ZwOpenFile(&FileHandle,@H_403_1@

#019 FILE_READ_ACCESS,@H_403_1@

#020 &ObjectAttributes,@H_403_1@

#021 &IoStatusBlock,@H_403_1@

#022 FILE_SHARE_READ,@H_403_1@

#023 0);@H_403_1@

#024 if (!NT_SUCCESS(Status))@H_403_1@

#025 {@H_403_1@

#026 /* Failed,bugcheck */@H_403_1@

#027 KeBugCheckEx(PROCESS1_INITIALIZATION_Failed,Status,2,0);@H_403_1@

#028 }@H_403_1@

#029 @H_403_1@

@H_403_1@

检查这个文件映射是否有效。@H_403_1@

#030 /* Check if the image is valid */@H_403_1@

#031 Status = MmCheckSystemImage(FileHandle,TRUE);@H_403_1@

#032 if (Status == STATUS_IMAGE_CHECKSUM_MISMATCH)@H_403_1@

#033 {@H_403_1@

#034 /* Raise a hard error */@H_403_1@

#035 HardErrorParameters = (ULONG_PTR)&PsNtDllPathName;@H_403_1@

#036 NtRaiseHardError(Status,@H_403_1@

#037 1,@H_403_1@

#038 1,@H_403_1@

#039 &HardErrorParameters,@H_403_1@

#040 OptionOk,@H_403_1@

#041 &HardErrorResponse);@H_403_1@

#042 return Status;@H_403_1@

#043 }@H_403_1@

#044 @H_403_1@

@H_403_1@

为NTDLL创建一段空间。@H_403_1@

#045 /* Create a section for NTDLL */@H_403_1@

#046 Status = ZwCreateSection(&SectionHandle,@H_403_1@

#047 SECTION_ALL_ACCESS,@H_403_1@

#048 NULL,@H_403_1@

#049 NULL,@H_403_1@

#050 PAGE_EXECUTE,@H_403_1@

#051 SEC_IMAGE,@H_403_1@

#052 FileHandle);@H_403_1@

#053 ZwClose(FileHandle);@H_403_1@

#054 if (!NT_SUCCESS(Status))@H_403_1@

#055 {@H_403_1@

#056 /* Failed,bugcheck */@H_403_1@

#057 KeBugCheckEx(PROCESS1_INITIALIZATION_Failed,3,0);@H_403_1@

#058 }@H_403_1@

#059 @H_403_1@

@H_403_1@

增加这个段引用。@H_403_1@

#060 /* Reference the Section */@H_403_1@

#061 Status = ObReferenceObjectByHandle(SectionHandle,@H_403_1@

#062 SECTION_ALL_ACCESS,@H_403_1@

#063 MmSectionObjectType,@H_403_1@

#064 KernelMode,@H_403_1@

#065 (PVOID*)&PspSystemDllSection,@H_403_1@

#066 NULL);@H_403_1@

#067 ZwClose(SectionHandle);@H_403_1@

#068 if (!NT_SUCCESS(Status))@H_403_1@

#069 {@H_403_1@

#070 /* Failed,bugcheck */@H_403_1@

#071 KeBugCheckEx(PROCESS1_INITIALIZATION_Failed,4,0);@H_403_1@

#072 }@H_403_1@

#073 @H_403_1@

@H_403_1@

调用函数PspMapSystemDll来映射这个DLL到内核里。@H_403_1@

#074 /* Map it */@H_403_1@

#075 Status = PspMapSystemDll(PsGetCurrentProcess(),&PspSystemDllBase,FALSE);@H_403_1@

#076 if (!NT_SUCCESS(Status))@H_403_1@

#077 {@H_403_1@

#078 /* Failed,bugcheck */@H_403_1@

#079 KeBugCheckEx(PROCESS1_INITIALIZATION_Failed,5,0);@H_403_1@

#080 }@H_403_1@

#081 @H_403_1@

#082 /* Return status */@H_403_1@

#083 return Status;@H_403_1@

#084}@H_403_1@

reactos操作系统实现(82)

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