Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-06-30 01:42:30 +00:00
Code Issues Packages Projects Releases Wiki Activity

moved the safe mem copy routines

Browse source 
svn path=/trunk/; revision=9582
This commit is contained in:
Gunnar Dalsnes 2004-06-01 10:16:26 +00:00
parent 05b4d3fb1d
commit 8448faa277
1 changed files with 46 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

47
reactos/ntoskrnl/mm/mm.c
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: mm.c,v 1.73 2004/04/10 22:35:25 gdalsnes Exp $
/* $Id: mm.c,v 1.74 2004/06/01 10:16:26 gdalsnes Exp $
*
* COPYRIGHT: See COPYING in the top directory
* PROJECT: ReactOS kernel
@ -50,6 +50,51 @@ MM_STATS MmStats;
/* FUNCTIONS ****************************************************************/
NTSTATUS STDCALL
MmCopyToCaller(PVOID Dest, const VOID *Src, ULONG NumberOfBytes)
{
NTSTATUS Status;
if (ExGetPreviousMode() == UserMode)
{
if ((ULONG)Dest >= KERNEL_BASE)
{
return(STATUS_ACCESS_VIOLATION);
}
Status = MmSafeCopyToUser(Dest, Src, NumberOfBytes);
return(Status);
}
else
{
memcpy(Dest, Src, NumberOfBytes);
return(STATUS_SUCCESS);
}
}
NTSTATUS STDCALL
MmCopyFromCaller(PVOID Dest, const VOID *Src, ULONG NumberOfBytes)
{
NTSTATUS Status;
if (ExGetPreviousMode() == UserMode)
{
if ((ULONG)Src >= KERNEL_BASE)
{
return(STATUS_ACCESS_VIOLATION);
}
Status = MmSafeCopyFromUser(Dest, Src, NumberOfBytes);
return(Status);
}
else
{
memcpy(Dest, Src, NumberOfBytes);
return(STATUS_SUCCESS);
}
}
NTSTATUS MmReleaseMemoryArea(PEPROCESS Process, PMEMORY_AREA Marea)
{
NTSTATUS Status;