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Fixed stack allocation for initial process (smss.exe).

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svn path=/trunk/; revision=2148
This commit is contained in:
Eric Kohl 2001-08-03 19:52:12 +00:00
parent 27346f997d
commit 4b420ec7f6
1 changed files with 85 additions and 28 deletions
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91
reactos/ntoskrnl/ldr/init.c
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@ -45,13 +45,12 @@ NTSTATUS LdrLoadInitialProcess (VOID)
HANDLE FileHandle;
HANDLE SectionHandle;
PVOID LdrStartupAddr;
PVOID StackBase;
ULONG StackSize;
PIMAGE_NT_HEADERS NTHeaders;
PPEB Peb;
PEPROCESS Process;
CONTEXT Context;
HANDLE ThreadHandle;
INITIAL_TEB InitialTeb;
/*
* Get the absolute path to smss.exe using the
@ -153,27 +152,81 @@ NTSTATUS LdrLoadInitialProcess (VOID)
Peb->ImageBaseAddress);
NTHeaders = RtlImageNtHeader(Peb->ImageBaseAddress);
DPRINT("NTHeaders %x\n", NTHeaders);
StackSize = NTHeaders->OptionalHeader.SizeOfStackReserve;
DPRINT("StackSize %x\n", StackSize);
InitialTeb.StackReserve = NTHeaders->OptionalHeader.SizeOfStackReserve;
InitialTeb.StackCommit = NTHeaders->OptionalHeader.SizeOfStackCommit;
/* add guard page size */
InitialTeb.StackCommit += PAGESIZE;
DPRINT("StackReserve 0x%lX StackCommit 0x%lX\n",
InitialTeb.StackReserve, InitialTeb.StackCommit);
KeDetachProcess();
DPRINT("Dereferencing process\n");
// ObDereferenceObject(Process);
StackBase = (PVOID)NULL;
DPRINT("StackBase %x StackSize %x\n", StackBase, StackSize);
DPRINT("Allocating virtual memory\n");
DPRINT("Allocating stack\n");
InitialTeb.StackAllocate = NULL;
Status = ZwAllocateVirtualMemory(ProcessHandle,
(PVOID*)&StackBase,
&InitialTeb.StackAllocate,
0,
&StackSize,
MEM_COMMIT,
&InitialTeb.StackReserve,
MEM_COMMIT, // MEM_RESERVE,
PAGE_READWRITE);
if (!NT_SUCCESS(Status))
{
DPRINT("Stack allocation failed (Status %x)", Status);
return Status;
return(Status);
}
DPRINT("StackAllocate: %p ReserveSize: 0x%lX\n",
InitialTeb.StackAllocate, InitialTeb.StackReserve);
InitialTeb.StackBase = (PVOID)((ULONG)InitialTeb.StackAllocate + InitialTeb.StackReserve);
InitialTeb.StackLimit = (PVOID)((ULONG)InitialTeb.StackBase - InitialTeb.StackCommit);
DPRINT("StackBase: %p StackCommit: 0x%lX\n",
InitialTeb.StackBase, InitialTeb.StackCommit);
#if 0
/* Commit stack */
Status = NtAllocateVirtualMemory(ProcessHandle,
&InitialTeb.StackLimit,
0,
&InitialTeb.StackCommit,
MEM_COMMIT,
PAGE_READWRITE);
if (!NT_SUCCESS(Status))
{
/* release the stack space */
NtFreeVirtualMemory(ProcessHandle,
InitialTeb.StackAllocate,
&InitialTeb.StackReserve,
MEM_RELEASE);
DPRINT("Error comitting stack page!\n");
return(Status);
}
DPRINT("StackLimit: %p\nStackCommit: 0x%lX\n",
InitialTeb.StackLimit,
InitialTeb.StackCommit);
/* Protect guard page */
Status = NtProtectVirtualMemory(ProcessHandle,
InitialTeb.StackLimit,
PAGESIZE,
PAGE_GUARD | PAGE_READWRITE,
&OldPageProtection);
if (!NT_SUCCESS(Status))
{
/* release the stack space */
NtFreeVirtualMemory(ProcessHandle,
InitialTeb.StackAllocate,
&InitialTeb.StackReserve,
MEM_RELEASE);
DPRINT("Error protecting guard page!\n");
return(Status);
}
#endif
DPRINT("Attaching to process\n");
KeAttachProcess(Process);
Peb = (PPEB)PEB_BASE;
@ -187,15 +240,15 @@ NTSTATUS LdrLoadInitialProcess (VOID)
* Initialize context to point to LdrStartup
*/
memset(&Context,0,sizeof(CONTEXT));
Context.SegSs = USER_DS;
Context.Esp = (ULONG)StackBase + StackSize - 20;
Context.EFlags = 0x202;
Context.SegCs = USER_CS;
Context.Eip = (ULONG)LdrStartupAddr;
Context.SegCs = USER_CS;
Context.SegDs = USER_DS;
Context.SegEs = USER_DS;
Context.SegFs = TEB_SELECTOR;
Context.SegGs = USER_DS;
Context.SegSs = USER_DS;
Context.EFlags = 0x202;
Context.Esp = (ULONG)InitialTeb.StackBase - 20;
DPRINT("LdrStartupAddr %x\n",LdrStartupAddr);
@ -209,13 +262,17 @@ NTSTATUS LdrLoadInitialProcess (VOID)
ProcessHandle,
NULL,
&Context,
NULL,
&InitialTeb,
FALSE);
if (!NT_SUCCESS(Status))
{
DPRINT("Thread creation failed (Status %x)\n", Status);
/* FIXME: destroy the stack memory block here */
NtFreeVirtualMemory(ProcessHandle,
InitialTeb.StackAllocate,
&InitialTeb.StackReserve,
MEM_RELEASE);
/* FIXME: unmap the section here */
/* FIXME: destroy the section here */