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653 lines
19 KiB
C
653 lines
19 KiB
C
/*
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* Win32 virtual memory functions
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*
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* Copyright 1997 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include "winnls.h"
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#include "winbase.h"
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#include "winternl.h"
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#include "winerror.h"
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#include "wine/exception.h"
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#include "msvcrt/excpt.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(virtual);
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static unsigned int page_size;
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/* filter for page-fault exceptions */
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static WINE_EXCEPTION_FILTER(page_fault)
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{
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if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
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return EXCEPTION_EXECUTE_HANDLER;
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return EXCEPTION_CONTINUE_SEARCH;
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}
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/***********************************************************************
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* VirtualAlloc (KERNEL32.@)
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* Reserves or commits a region of pages in virtual address space
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*
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* RETURNS
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* Base address of allocated region of pages
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* NULL: Failure
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*/
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LPVOID WINAPI VirtualAlloc(
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LPVOID addr, /* [in] Address of region to reserve or commit */
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SIZE_T size, /* [in] Size of region */
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DWORD type, /* [in] Type of allocation */
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DWORD protect)/* [in] Type of access protection */
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{
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return VirtualAllocEx( GetCurrentProcess(), addr, size, type, protect );
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}
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/***********************************************************************
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* VirtualAllocEx (KERNEL32.@)
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*
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* Seems to be just as VirtualAlloc, but with process handle.
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*/
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LPVOID WINAPI VirtualAllocEx(
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HANDLE hProcess, /* [in] Handle of process to do mem operation */
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LPVOID addr, /* [in] Address of region to reserve or commit */
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SIZE_T size, /* [in] Size of region */
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DWORD type, /* [in] Type of allocation */
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DWORD protect ) /* [in] Type of access protection */
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{
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LPVOID ret;
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NTSTATUS status;
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if ((status = NtAllocateVirtualMemory( hProcess, &ret, addr, &size, type, protect )))
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{
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SetLastError( RtlNtStatusToDosError(status) );
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ret = NULL;
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}
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return ret;
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}
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/***********************************************************************
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* VirtualFree (KERNEL32.@)
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* Release or decommits a region of pages in virtual address space.
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*
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* RETURNS
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* TRUE: Success
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* FALSE: Failure
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*/
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BOOL WINAPI VirtualFree(
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LPVOID addr, /* [in] Address of region of committed pages */
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SIZE_T size, /* [in] Size of region */
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DWORD type /* [in] Type of operation */
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) {
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return VirtualFreeEx( GetCurrentProcess(), addr, size, type );
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}
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/***********************************************************************
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* VirtualFreeEx (KERNEL32.@)
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* Release or decommits a region of pages in virtual address space.
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*
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* RETURNS
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* TRUE: Success
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* FALSE: Failure
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*/
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BOOL WINAPI VirtualFreeEx( HANDLE process, LPVOID addr, SIZE_T size, DWORD type )
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{
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NTSTATUS status = NtFreeVirtualMemory( process, &addr, &size, type );
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if (status) SetLastError( RtlNtStatusToDosError(status) );
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return !status;
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}
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/***********************************************************************
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* VirtualLock (KERNEL32.@)
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* Locks the specified region of virtual address space
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*
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* NOTE
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* Always returns TRUE
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*
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* RETURNS
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* TRUE: Success
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* FALSE: Failure
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*/
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BOOL WINAPI VirtualLock( LPVOID addr, /* [in] Address of first byte of range to lock */
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SIZE_T size ) /* [in] Number of bytes in range to lock */
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{
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NTSTATUS status = NtLockVirtualMemory( GetCurrentProcess(), &addr, &size, 1 );
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if (status) SetLastError( RtlNtStatusToDosError(status) );
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return !status;
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}
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/***********************************************************************
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* VirtualUnlock (KERNEL32.@)
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* Unlocks a range of pages in the virtual address space
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*
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* NOTE
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* Always returns TRUE
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*
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* RETURNS
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* TRUE: Success
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* FALSE: Failure
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*/
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BOOL WINAPI VirtualUnlock( LPVOID addr, /* [in] Address of first byte of range */
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SIZE_T size ) /* [in] Number of bytes in range */
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{
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NTSTATUS status = NtUnlockVirtualMemory( GetCurrentProcess(), &addr, &size, 1 );
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if (status) SetLastError( RtlNtStatusToDosError(status) );
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return !status;
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}
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/***********************************************************************
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* VirtualProtect (KERNEL32.@)
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* Changes the access protection on a region of committed pages
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*
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* RETURNS
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* TRUE: Success
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* FALSE: Failure
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*/
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BOOL WINAPI VirtualProtect(
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LPVOID addr, /* [in] Address of region of committed pages */
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SIZE_T size, /* [in] Size of region */
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DWORD new_prot, /* [in] Desired access protection */
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LPDWORD old_prot /* [out] Address of variable to get old protection */
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) {
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return VirtualProtectEx( GetCurrentProcess(), addr, size, new_prot, old_prot );
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}
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/***********************************************************************
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* VirtualProtectEx (KERNEL32.@)
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* Changes the access protection on a region of committed pages in the
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* virtual address space of a specified process
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*
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* RETURNS
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* TRUE: Success
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* FALSE: Failure
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*/
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BOOL WINAPI VirtualProtectEx(
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HANDLE process, /* [in] Handle of process */
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LPVOID addr, /* [in] Address of region of committed pages */
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SIZE_T size, /* [in] Size of region */
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DWORD new_prot, /* [in] Desired access protection */
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LPDWORD old_prot /* [out] Address of variable to get old protection */ )
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{
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NTSTATUS status = NtProtectVirtualMemory( process, &addr, &size, new_prot, old_prot );
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if (status) SetLastError( RtlNtStatusToDosError(status) );
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return !status;
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}
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/***********************************************************************
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* VirtualQuery (KERNEL32.@)
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* Provides info about a range of pages in virtual address space
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*
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* RETURNS
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* Number of bytes returned in information buffer
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* or 0 if addr is >= 0xc0000000 (kernel space).
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*/
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SIZE_T WINAPI VirtualQuery(
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LPCVOID addr, /* [in] Address of region */
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LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
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SIZE_T len /* [in] Size of buffer */
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) {
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return VirtualQueryEx( GetCurrentProcess(), addr, info, len );
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}
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/***********************************************************************
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* VirtualQueryEx (KERNEL32.@)
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* Provides info about a range of pages in virtual address space of a
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* specified process
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*
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* RETURNS
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* Number of bytes returned in information buffer
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*/
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SIZE_T WINAPI VirtualQueryEx(
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HANDLE process, /* [in] Handle of process */
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LPCVOID addr, /* [in] Address of region */
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LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
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SIZE_T len /* [in] Size of buffer */ )
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{
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DWORD ret;
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NTSTATUS status;
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if ((status = NtQueryVirtualMemory( process, addr, MemoryBasicInformation, info, len, &ret )))
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{
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SetLastError( RtlNtStatusToDosError(status) );
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ret = 0;
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}
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return ret;
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}
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/***********************************************************************
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* CreateFileMappingA (KERNEL32.@)
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* Creates a named or unnamed file-mapping object for the specified file
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*
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* RETURNS
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* Handle: Success
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* 0: Mapping object does not exist
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* NULL: Failure
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*/
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HANDLE WINAPI CreateFileMappingA(
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HANDLE hFile, /* [in] Handle of file to map */
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SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
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DWORD protect, /* [in] Protection for mapping object */
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DWORD size_high, /* [in] High-order 32 bits of object size */
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DWORD size_low, /* [in] Low-order 32 bits of object size */
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LPCSTR name /* [in] Name of file-mapping object */ )
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{
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WCHAR buffer[MAX_PATH];
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if (!name) return CreateFileMappingW( hFile, sa, protect, size_high, size_low, NULL );
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if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
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{
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SetLastError( ERROR_FILENAME_EXCED_RANGE );
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return 0;
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}
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return CreateFileMappingW( hFile, sa, protect, size_high, size_low, buffer );
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}
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/***********************************************************************
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* CreateFileMappingW (KERNEL32.@)
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* See CreateFileMappingA
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*/
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HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
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DWORD protect, DWORD size_high,
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DWORD size_low, LPCWSTR name )
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{
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static const int sec_flags = SEC_FILE | SEC_IMAGE | SEC_RESERVE | SEC_COMMIT | SEC_NOCACHE;
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HANDLE ret;
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OBJECT_ATTRIBUTES attr;
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UNICODE_STRING nameW;
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NTSTATUS status;
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DWORD access, sec_type;
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LARGE_INTEGER size;
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attr.Length = sizeof(attr);
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attr.RootDirectory = 0;
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attr.ObjectName = NULL;
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attr.Attributes = (sa && sa->bInheritHandle) ? OBJ_INHERIT : 0;
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attr.SecurityDescriptor = sa ? sa->lpSecurityDescriptor : NULL;
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attr.SecurityQualityOfService = NULL;
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if (name)
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{
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RtlInitUnicodeString( &nameW, name );
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attr.ObjectName = &nameW;
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}
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sec_type = protect & sec_flags;
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protect &= ~sec_flags;
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if (!sec_type) sec_type = SEC_COMMIT;
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switch(protect)
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{
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case 0:
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case PAGE_READONLY:
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case PAGE_WRITECOPY:
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access = STANDARD_RIGHTS_REQUIRED | SECTION_QUERY | SECTION_MAP_READ;
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break;
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case PAGE_READWRITE:
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access = STANDARD_RIGHTS_REQUIRED | SECTION_QUERY | SECTION_MAP_READ | SECTION_MAP_WRITE;
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break;
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default:
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SetLastError( ERROR_INVALID_PARAMETER );
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return 0;
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}
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if (hFile == INVALID_HANDLE_VALUE)
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{
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hFile = 0;
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if (!size_low && !size_high)
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{
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SetLastError( ERROR_INVALID_PARAMETER );
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return 0;
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}
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}
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size.s.LowPart = size_low;
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size.s.HighPart = size_high;
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status = NtCreateSection( &ret, access, &attr, &size, protect, sec_type, hFile );
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SetLastError( RtlNtStatusToDosError(status) );
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return ret;
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}
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/***********************************************************************
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* OpenFileMappingA (KERNEL32.@)
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* Opens a named file-mapping object.
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*
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* RETURNS
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* Handle: Success
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* NULL: Failure
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*/
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HANDLE WINAPI OpenFileMappingA(
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DWORD access, /* [in] Access mode */
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BOOL inherit, /* [in] Inherit flag */
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LPCSTR name ) /* [in] Name of file-mapping object */
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{
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WCHAR buffer[MAX_PATH];
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if (!name) return OpenFileMappingW( access, inherit, NULL );
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if (!MultiByteToWideChar( CP_ACP, 0, name, -1, buffer, MAX_PATH ))
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{
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SetLastError( ERROR_FILENAME_EXCED_RANGE );
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return 0;
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}
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return OpenFileMappingW( access, inherit, buffer );
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}
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/***********************************************************************
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* OpenFileMappingW (KERNEL32.@)
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* See OpenFileMappingA
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*/
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HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
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{
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OBJECT_ATTRIBUTES attr;
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UNICODE_STRING nameW;
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HANDLE ret;
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NTSTATUS status;
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if (!name)
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{
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SetLastError( ERROR_INVALID_PARAMETER );
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return 0;
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}
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attr.Length = sizeof(attr);
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attr.RootDirectory = 0;
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attr.ObjectName = &nameW;
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attr.Attributes = inherit ? OBJ_INHERIT : 0;
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attr.SecurityDescriptor = NULL;
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attr.SecurityQualityOfService = NULL;
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RtlInitUnicodeString( &nameW, name );
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if (access == FILE_MAP_COPY) access = FILE_MAP_READ;
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if ((status = NtOpenSection( &ret, access, &attr )))
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{
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SetLastError( RtlNtStatusToDosError(status) );
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ret = 0;
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}
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return ret;
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}
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/***********************************************************************
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* MapViewOfFile (KERNEL32.@)
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* Maps a view of a file into the address space
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*
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* RETURNS
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* Starting address of mapped view
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* NULL: Failure
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*/
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LPVOID WINAPI MapViewOfFile(
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HANDLE mapping, /* [in] File-mapping object to map */
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DWORD access, /* [in] Access mode */
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DWORD offset_high, /* [in] High-order 32 bits of file offset */
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DWORD offset_low, /* [in] Low-order 32 bits of file offset */
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SIZE_T count /* [in] Number of bytes to map */
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) {
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return MapViewOfFileEx( mapping, access, offset_high,
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offset_low, count, NULL );
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}
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/***********************************************************************
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* MapViewOfFileEx (KERNEL32.@)
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* Maps a view of a file into the address space
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*
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* RETURNS
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* Starting address of mapped view
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* NULL: Failure
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*/
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LPVOID WINAPI MapViewOfFileEx(
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HANDLE handle, /* [in] File-mapping object to map */
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DWORD access, /* [in] Access mode */
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DWORD offset_high, /* [in] High-order 32 bits of file offset */
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DWORD offset_low, /* [in] Low-order 32 bits of file offset */
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SIZE_T count, /* [in] Number of bytes to map */
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LPVOID addr /* [in] Suggested starting address for mapped view */
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) {
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NTSTATUS status;
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LARGE_INTEGER offset;
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ULONG protect;
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offset.s.LowPart = offset_low;
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offset.s.HighPart = offset_high;
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if (access & FILE_MAP_WRITE) protect = PAGE_READWRITE;
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else if (access & FILE_MAP_READ) protect = PAGE_READONLY;
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else if (access & FILE_MAP_COPY) protect = PAGE_WRITECOPY;
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else protect = PAGE_NOACCESS;
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if ((status = NtMapViewOfSection( handle, GetCurrentProcess(), &addr, 0, 0, &offset,
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&count, ViewShare, 0, protect )))
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{
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SetLastError( RtlNtStatusToDosError(status) );
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addr = NULL;
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}
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return addr;
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}
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/***********************************************************************
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* UnmapViewOfFile (KERNEL32.@)
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* Unmaps a mapped view of a file.
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*
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* NOTES
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* Should addr be an LPCVOID?
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*
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* RETURNS
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* TRUE: Success
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* FALSE: Failure
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*/
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BOOL WINAPI UnmapViewOfFile( LPVOID addr ) /* [in] Address where mapped view begins */
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{
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NTSTATUS status = NtUnmapViewOfSection( GetCurrentProcess(), addr );
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if (status) SetLastError( RtlNtStatusToDosError(status) );
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return !status;
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}
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/***********************************************************************
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* FlushViewOfFile (KERNEL32.@)
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* Writes to the disk a byte range within a mapped view of a file
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*
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* RETURNS
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* TRUE: Success
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* FALSE: Failure
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*/
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BOOL WINAPI FlushViewOfFile( LPCVOID base, /* [in] Start address of byte range to flush */
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SIZE_T size ) /* [in] Number of bytes in range */
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{
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NTSTATUS status = NtFlushVirtualMemory( GetCurrentProcess(), &base, &size, 0 );
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if (status)
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{
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if (status == STATUS_NOT_MAPPED_DATA) status = STATUS_SUCCESS;
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else SetLastError( RtlNtStatusToDosError(status) );
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}
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return !status;
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}
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/***********************************************************************
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* IsBadReadPtr (KERNEL32.@)
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*
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* RETURNS
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* FALSE: Process has read access to entire block
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* TRUE: Otherwise
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*/
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BOOL WINAPI IsBadReadPtr(
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LPCVOID ptr, /* [in] Address of memory block */
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UINT size ) /* [in] Size of block */
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{
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if (!size) return FALSE; /* handle 0 size case w/o reference */
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if (!page_size) page_size = getpagesize();
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__TRY
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{
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volatile const char *p = ptr;
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char dummy;
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UINT count = size;
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while (count > page_size)
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{
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dummy = *p;
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p += page_size;
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count -= page_size;
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}
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dummy = p[0];
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dummy = p[count - 1];
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}
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__EXCEPT(page_fault) { return TRUE; }
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__ENDTRY
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return FALSE;
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}
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/***********************************************************************
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* IsBadWritePtr (KERNEL32.@)
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*
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|
* RETURNS
|
|
* FALSE: Process has write access to entire block
|
|
* TRUE: Otherwise
|
|
*/
|
|
BOOL WINAPI IsBadWritePtr(
|
|
LPVOID ptr, /* [in] Address of memory block */
|
|
UINT size ) /* [in] Size of block in bytes */
|
|
{
|
|
if (!size) return FALSE; /* handle 0 size case w/o reference */
|
|
if (!page_size) page_size = getpagesize();
|
|
__TRY
|
|
{
|
|
volatile char *p = ptr;
|
|
UINT count = size;
|
|
|
|
while (count > page_size)
|
|
{
|
|
*p |= 0;
|
|
p += page_size;
|
|
count -= page_size;
|
|
}
|
|
p[0] |= 0;
|
|
p[count - 1] |= 0;
|
|
}
|
|
__EXCEPT(page_fault) { return TRUE; }
|
|
__ENDTRY
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadHugeReadPtr (KERNEL32.@)
|
|
* RETURNS
|
|
* FALSE: Process has read access to entire block
|
|
* TRUE: Otherwise
|
|
*/
|
|
BOOL WINAPI IsBadHugeReadPtr(
|
|
LPCVOID ptr, /* [in] Address of memory block */
|
|
UINT size /* [in] Size of block */
|
|
) {
|
|
return IsBadReadPtr( ptr, size );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadHugeWritePtr (KERNEL32.@)
|
|
* RETURNS
|
|
* FALSE: Process has write access to entire block
|
|
* TRUE: Otherwise
|
|
*/
|
|
BOOL WINAPI IsBadHugeWritePtr(
|
|
LPVOID ptr, /* [in] Address of memory block */
|
|
UINT size /* [in] Size of block */
|
|
) {
|
|
return IsBadWritePtr( ptr, size );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadCodePtr (KERNEL32.@)
|
|
*
|
|
* RETURNS
|
|
* FALSE: Process has read access to specified memory
|
|
* TRUE: Otherwise
|
|
*/
|
|
BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
|
|
{
|
|
return IsBadReadPtr( ptr, 1 );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadStringPtrA (KERNEL32.@)
|
|
*
|
|
* RETURNS
|
|
* FALSE: Read access to all bytes in string
|
|
* TRUE: Else
|
|
*/
|
|
BOOL WINAPI IsBadStringPtrA(
|
|
LPCSTR str, /* [in] Address of string */
|
|
UINT max ) /* [in] Maximum size of string */
|
|
{
|
|
__TRY
|
|
{
|
|
volatile const char *p = str;
|
|
while (p != str + max) if (!*p++) break;
|
|
}
|
|
__EXCEPT(page_fault) { return TRUE; }
|
|
__ENDTRY
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IsBadStringPtrW (KERNEL32.@)
|
|
* See IsBadStringPtrA
|
|
*/
|
|
BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
|
|
{
|
|
__TRY
|
|
{
|
|
volatile const WCHAR *p = str;
|
|
while (p != str + max) if (!*p++) break;
|
|
}
|
|
__EXCEPT(page_fault) { return TRUE; }
|
|
__ENDTRY
|
|
return FALSE;
|
|
}
|