Sweden-Number/dlls/ntdll/virtual.c

108 lines
3.7 KiB
C

/*
* Win32 virtual memory functions
*
* Copyright 1997, 2002 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <assert.h>
#include <errno.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#define NONAMELESSUNION
#include "windef.h"
#include "winternl.h"
#include "wine/server.h"
#include "wine/debug.h"
#include "ntdll_misc.h"
WINE_DEFAULT_DEBUG_CHANNEL(virtual);
/**********************************************************************
* RtlCreateUserStack (NTDLL.@)
*/
NTSTATUS WINAPI RtlCreateUserStack( SIZE_T commit, SIZE_T reserve, ULONG zero_bits,
SIZE_T commit_align, SIZE_T reserve_align, INITIAL_TEB *stack )
{
PROCESS_STACK_ALLOCATION_INFORMATION alloc;
NTSTATUS status;
TRACE("commit %#lx, reserve %#lx, zero_bits %u, commit_align %#lx, reserve_align %#lx, stack %p\n",
commit, reserve, zero_bits, commit_align, reserve_align, stack);
if (!commit_align || !reserve_align)
return STATUS_INVALID_PARAMETER;
if (!commit || !reserve)
{
IMAGE_NT_HEADERS *nt = RtlImageNtHeader( NtCurrentTeb()->Peb->ImageBaseAddress );
if (!reserve) reserve = nt->OptionalHeader.SizeOfStackReserve;
if (!commit) commit = nt->OptionalHeader.SizeOfStackCommit;
}
reserve = (reserve + reserve_align - 1) & ~(reserve_align - 1);
commit = (commit + commit_align - 1) & ~(commit_align - 1);
if (reserve < commit) reserve = commit;
if (reserve < 0x100000) reserve = 0x100000;
reserve = (reserve + 0xffff) & ~0xffff; /* round to 64K boundary */
alloc.ReserveSize = reserve;
alloc.ZeroBits = zero_bits;
status = NtSetInformationProcess( GetCurrentProcess(), ProcessThreadStackAllocation,
&alloc, sizeof(alloc) );
if (!status)
{
void *addr = alloc.StackBase;
SIZE_T size = page_size;
NtAllocateVirtualMemory( GetCurrentProcess(), &addr, 0, &size, MEM_COMMIT, PAGE_NOACCESS );
addr = (char *)alloc.StackBase + page_size;
NtAllocateVirtualMemory( GetCurrentProcess(), &addr, 0, &size, MEM_COMMIT, PAGE_READWRITE | PAGE_GUARD );
addr = (char *)alloc.StackBase + 2 * page_size;
size = reserve - 2 * page_size;
NtAllocateVirtualMemory( GetCurrentProcess(), &addr, 0, &size, MEM_COMMIT, PAGE_READWRITE );
/* note: limit is lower than base since the stack grows down */
stack->OldStackBase = 0;
stack->OldStackLimit = 0;
stack->DeallocationStack = alloc.StackBase;
stack->StackBase = (char *)alloc.StackBase + reserve;
stack->StackLimit = (char *)alloc.StackBase + 2 * page_size;
}
return status;
}
/**********************************************************************
* RtlFreeUserStack (NTDLL.@)
*/
void WINAPI RtlFreeUserStack( void *stack )
{
SIZE_T size = 0;
TRACE("stack %p\n", stack);
NtFreeVirtualMemory( NtCurrentProcess(), &stack, &size, MEM_RELEASE );
}