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- Rewrite ExpLoadInitialProcess by inlining and simplifying what the call to RtlCreateProcsesParameters should do, and also create our own custom environment with the same arguments that NT's smss gets.

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- This optimizes booting as well as gets use the differnet SESSIONY_INITIALIZATION_FAILED, where Y is a number representing which step of the process parameter/envieonment creation failed.

svn path=/trunk/; revision=24411
This commit is contained in:
Alex Ionescu
2006-10-05 14:49:20 +00:00
parent 3727f8fc7d
commit 3f66fcf605
1 changed files with 116 additions and 36 deletions
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reactos/ntoskrnl/ex/init.c
+116 -36
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@@ -332,60 +332,140 @@ NTSTATUS
ExpLoadInitialProcess(PHANDLE ProcessHandle,
PHANDLE ThreadHandle)
{
UNICODE_STRING CurrentDirectory;
UNICODE_STRING ImagePath = RTL_CONSTANT_STRING(L"\\SystemRoot\\system32\\smss.exe");
PRTL_USER_PROCESS_PARAMETERS ProcessParameters = NULL;
NTSTATUS Status;
PRTL_USER_PROCESS_PARAMETERS Params=NULL;
RTL_USER_PROCESS_INFORMATION Info;
ULONG Size;
RTL_USER_PROCESS_INFORMATION ProcessInformation;
PWSTR p;
UNICODE_STRING NullString = RTL_CONSTANT_STRING(L"");
UNICODE_STRING SmssName, Environment, SystemDriveString;
RtlInitUnicodeString(&CurrentDirectory,
SharedUserData->NtSystemRoot);
/* Create the Parameters */
Status = RtlCreateProcessParameters(&Params,
&ImagePath,
NULL,
&CurrentDirectory,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL);
if(!NT_SUCCESS(Status))
/* Allocate memory for the process parameters */
Size = sizeof(RTL_USER_PROCESS_PARAMETERS) +
((MAX_PATH * 4) * sizeof(WCHAR));
Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
(PVOID)&ProcessParameters,
0,
&Size,
MEM_COMMIT,
PAGE_READWRITE);
if (!NT_SUCCESS(Status))
{
DPRINT1("Failed to create ppb!\n");
return Status;
/* Failed */
KeBugCheckEx(SESSION1_INITIALIZATION_FAILED, Status, 0, 0, 0);
}
DPRINT("Creating process\n");
Status = RtlCreateUserProcess(&ImagePath,
/* Setup the basic header, and give the process the low 1MB to itself */
ProcessParameters->Length = Size;
ProcessParameters->MaximumLength = Size;
ProcessParameters->Flags = RTL_USER_PROCESS_PARAMETERS_NORMALIZED |
RTL_USER_PROCESS_PARAMETERS_RESERVE_1MB;
/* Allocate a page for the environment */
Size = PAGE_SIZE;
Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
(PVOID)&ProcessParameters->Environment,
0,
&Size,
MEM_COMMIT,
PAGE_READWRITE
);
if (!NT_SUCCESS(Status))
{
/* Failed */
KeBugCheckEx(SESSION2_INITIALIZATION_FAILED, Status, 0, 0, 0);
}
/* Make a buffer for the DOS path */
p = (PWSTR)(ProcessParameters + 1);
ProcessParameters->CurrentDirectory.DosPath.Buffer = p;
ProcessParameters->
CurrentDirectory.DosPath.MaximumLength = MAX_PATH * sizeof(WCHAR);
/* Copy the DOS path */
RtlCopyUnicodeString(&ProcessParameters->CurrentDirectory.DosPath,
&NtSystemRoot);
/* Make a buffer for the DLL Path */
p = (PWSTR)((PCHAR)ProcessParameters->CurrentDirectory.DosPath.Buffer +
ProcessParameters->CurrentDirectory.DosPath.MaximumLength);
ProcessParameters->DllPath.Buffer = p;
ProcessParameters->DllPath.MaximumLength = MAX_PATH * sizeof(WCHAR);
/* Copy the DLL path and append the system32 directory */
RtlCopyUnicodeString(&ProcessParameters->DllPath,
&ProcessParameters->CurrentDirectory.DosPath);
RtlAppendUnicodeToString(&ProcessParameters->DllPath, L"\\System32");
/* Make a buffer for the image name */
p = (PWSTR)((PCHAR)ProcessParameters->DllPath.Buffer +
ProcessParameters->DllPath.MaximumLength);
ProcessParameters->ImagePathName.Buffer = p;
ProcessParameters->ImagePathName.MaximumLength = MAX_PATH * sizeof(WCHAR);
/* Append the system path and session manager name */
RtlAppendUnicodeToString(&ProcessParameters->ImagePathName,
L"\\SystemRoot\\System32");
RtlAppendUnicodeToString(&ProcessParameters->ImagePathName,
L"\\smss.exe");
/* Create the environment string */
RtlInitEmptyUnicodeString(&Environment,
ProcessParameters->Environment,
Size);
/* Append the DLL path to it */
RtlAppendUnicodeToString(&Environment, L"Path=" );
RtlAppendUnicodeStringToString(&Environment, &ProcessParameters->DllPath);
RtlAppendUnicodeStringToString(&Environment, &NullString );
/* Create the system drive string */
SystemDriveString = NtSystemRoot;
SystemDriveString.Length = 2 * sizeof(WCHAR);
/* Append it to the environment */
RtlAppendUnicodeToString(&Environment, L"SystemDrive=");
RtlAppendUnicodeStringToString(&Environment, &SystemDriveString);
RtlAppendUnicodeStringToString(&Environment, &NullString);
/* Append the system root to the environment */
RtlAppendUnicodeToString(&Environment, L"SystemRoot=");
RtlAppendUnicodeStringToString(&Environment, &NtSystemRoot);
RtlAppendUnicodeStringToString(&Environment, &NullString);
/* Get and set the command line equal to the image path */
ProcessParameters->CommandLine = ProcessParameters->ImagePathName;
SmssName = ProcessParameters->ImagePathName;
/* Create SMSS process */
Status = RtlCreateUserProcess(&SmssName,
OBJ_CASE_INSENSITIVE,
Params,
RtlDeNormalizeProcessParams(
ProcessParameters),
NULL,
NULL,
NULL,
FALSE,
NULL,
NULL,
&Info);
/* Close the handle and free the params */
RtlDestroyProcessParameters(Params);
&ProcessInformation);
if (!NT_SUCCESS(Status))
{
DPRINT1("NtCreateProcess() failed (Status %lx)\n", Status);
return(Status);
/* Failed */
KeBugCheckEx(SESSION3_INITIALIZATION_FAILED, Status, 0, 0, 0);
}
/* Start it up */
ZwResumeThread(Info.ThreadHandle, NULL);
/* Resume the thread */
Status = ZwResumeThread(ProcessInformation.ThreadHandle, NULL);
if (!NT_SUCCESS(Status))
{
/* Failed */
KeBugCheckEx(SESSION4_INITIALIZATION_FAILED, Status, 0, 0, 0);
}
/* Return Handles */
*ProcessHandle = Info.ProcessHandle;
*ThreadHandle = Info.ThreadHandle;
DPRINT("Process created successfully\n");
*ProcessHandle = ProcessInformation.ProcessHandle;
*ThreadHandle = ProcessInformation.ThreadHandle;
return STATUS_SUCCESS;
}