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* Took an intelligent guess at NtLockVirtualMemory and NtUnlockVirtualMemory and attempted to implement them, but they're most likely *wrong*. Shouldn't break anything already though.

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svn path=/trunk/; revision=5698
This commit is contained in:
Andrew Greenwood 2003-08-20 10:37:33 +00:00
parent bcefe84d60
commit 1dbf9b9981
1 changed files with 75 additions and 4 deletions
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79
reactos/ntoskrnl/mm/virtual.c
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@ -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: virtual.c,v 1.69 2003/08/14 10:40:51 ekohl Exp $
/* $Id: virtual.c,v 1.70 2003/08/20 10:37:33 silverblade Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/mm/virtual.c
@ -62,9 +62,43 @@ NTSTATUS STDCALL
NtLockVirtualMemory(HANDLE ProcessHandle,
PVOID BaseAddress,
ULONG NumberOfBytesToLock,
PULONG NumberOfBytesLocked)
PULONG NumberOfBytesLocked) // ULONG LockOption?
{
UNIMPLEMENTED;
// AG [08-20-03] : I have *no* idea if this is correct, I just used the
// other functions as a template and made a few intelligent guesses...
NTSTATUS Status;
PMDL Mdl;
PEPROCESS Process;
DPRINT("NtLockVirtualMemory(ProcessHandle %x, BaseAddress %x, "
"NumberOfBytesToLock %d), NumberOfBytesLocked %x\n",ProcessHandle,BaseAddress,
NumberOfBytesToLock, NumberOfBytesLocked);
Status = ObReferenceObjectByHandle(ProcessHandle,
PROCESS_VM_WRITE,
NULL,
UserMode,
(PVOID*)(&Process),
NULL);
if (Status != STATUS_SUCCESS)
{
return(Status);
}
Mdl = MmCreateMdl(NULL,
BaseAddress,
NumberOfBytesToLock);
MmProbeAndLockPages(Mdl,
UserMode,
IoWriteAccess);
ExFreePool(Mdl); // Are we supposed to do this here?
ObDereferenceObject(Process);
*NumberOfBytesLocked = NumberOfBytesToLock;
return(STATUS_SUCCESS);
}
NTSTATUS STDCALL
@ -285,7 +319,44 @@ NtUnlockVirtualMemory(HANDLE ProcessHandle,
ULONG NumberOfBytesToUnlock,
PULONG NumberOfBytesUnlocked OPTIONAL)
{
UNIMPLEMENTED;
// AG [08-20-03] : I have *no* idea if this is correct, I just used the
// other functions as a template and made a few intelligent guesses...
NTSTATUS Status;
PMDL Mdl;
PEPROCESS Process;
DPRINT("NtUnlockVirtualMemory(ProcessHandle %x, BaseAddress %x, "
"NumberOfBytesToUnlock %d), NumberOfBytesUnlocked %x\n",ProcessHandle,BaseAddress,
NumberOfBytesToUnlock, NumberOfBytesUnlocked);
Status = ObReferenceObjectByHandle(ProcessHandle,
PROCESS_VM_WRITE,
NULL,
UserMode,
(PVOID*)(&Process),
NULL);
if (Status != STATUS_SUCCESS)
{
return(Status);
}
Mdl = MmCreateMdl(NULL,
BaseAddress,
NumberOfBytesToUnlock);
ObDereferenceObject(Process);
if (Mdl->MappedSystemVa != NULL)
{
MmUnmapLockedPages(Mdl->MappedSystemVa, Mdl);
}
MmUnlockPages(Mdl);
ExFreePool(Mdl);
*NumberOfBytesUnlocked = NumberOfBytesToUnlock;
return(STATUS_SUCCESS);
}