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