Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2025-04-19 04:07:16 +00:00
Code Issues Projects Releases Packages Wiki Activity

[NTOSKRNL]

Browse source 
Use the VAD tree to search for MEMORY_AREAS, except when inserting an ARM3 based MA. In this case we still need to use the old tables, since the related VAD is already inserted into the VAD tree.

svn path=/trunk/; revision=67793
This commit is contained in:
Timo Kreuzer 2015-05-17 00:34:45 +00:00
parent 53a77173f5
commit 3565260212
1 changed files with 76 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

85
reactos/ntoskrnl/mm/marea.c
View file

@ -51,6 +51,9 @@
MEMORY_AREA MiStaticMemoryAreas[MI_STATIC_MEMORY_AREAS];
ULONG MiStaticMemoryAreaCount;
MM_AVL_TABLE MiRosKernelVadRoot;
BOOLEAN MiRosKernelVadRootInitialized;
/* FUNCTIONS *****************************************************************/
/**
@ -188,11 +191,61 @@ MmLocateMemoryAreaByAddress(
return NULL;
}
PMEMORY_AREA NTAPI
PMEMORY_AREA
NTAPI
MmLocateMemoryAreaByRegion(
PMMSUPPORT AddressSpace,
PVOID Address_,
ULONG_PTR Length)
{
ULONG_PTR StartVpn = (ULONG_PTR)Address_ / PAGE_SIZE;
ULONG_PTR EndVpn = ((ULONG_PTR)Address_ + Length - 1) / PAGE_SIZE;
PEPROCESS Process;
PMM_AVL_TABLE Table;
PMMADDRESS_NODE Node;
PMEMORY_AREA MemoryArea;
TABLE_SEARCH_RESULT Result;
PMMVAD_LONG Vad;
Process = MmGetAddressSpaceOwner(AddressSpace);
Table = (Process != NULL) ? &Process->VadRoot : &MiRosKernelVadRoot;
Result = MiCheckForConflictingNode(StartVpn, EndVpn, Table, &Node);
if (Result != TableFoundNode)
{
return NULL;
}
Vad = (PMMVAD_LONG)Node;
if (Vad->u.VadFlags.Spare == 0)
{
/* Check if this is VM VAD */
if (Vad->ControlArea == NULL)
{
/* We store the reactos MEMORY_AREA here */
MemoryArea = (PMEMORY_AREA)Vad->FirstPrototypePte;
}
else
{
/* This is a section VAD. Store the MAREA here for now */
MemoryArea = (PMEMORY_AREA)Vad->u4.Banked;
}
}
else
{
MemoryArea = (PMEMORY_AREA)Node;
}
ASSERT(MemoryArea != NULL);
return MemoryArea;
}
PMEMORY_AREA
NTAPI
MmLocateMemoryAreaByRegionOld(
PMMSUPPORT AddressSpace,
PVOID Address_,
ULONG_PTR Length)
{
PMEMORY_AREA Node;
ULONG_PTR Address = (ULONG_PTR)Address_;
@ -367,8 +420,6 @@ MiMakeProtectionMask(
IN ULONG Protect
);
MM_AVL_TABLE MiRosKernelVadRoot;
BOOLEAN MiRosKernelVadRootInitialized;
static VOID
MmInsertMemoryArea(
@ -1016,13 +1067,29 @@ MmCreateMemoryArea(PMMSUPPORT AddressSpace,
return STATUS_ACCESS_VIOLATION;
}
if (MmLocateMemoryAreaByRegion(AddressSpace,
*BaseAddress,
tmpLength) != NULL)
/* Check if this is a region owned by ARM3 */
if (MemoryArea->Type == MEMORY_AREA_OWNED_BY_ARM3)
{
DPRINT("Memory area already occupied\n");
if (!(Type & MEMORY_AREA_STATIC)) ExFreePoolWithTag(MemoryArea, TAG_MAREA);
return STATUS_CONFLICTING_ADDRESSES;
/* ARM3 is inserting this MA to synchronize the old tree, use the old tree */
if (MmLocateMemoryAreaByRegionOld(AddressSpace,
*BaseAddress,
tmpLength) != NULL)
{
DPRINT("Memory area already occupied\n");
if (!(Type & MEMORY_AREA_STATIC)) ExFreePoolWithTag(MemoryArea, TAG_MAREA);
return STATUS_CONFLICTING_ADDRESSES;
}
}
else
{
if (MmLocateMemoryAreaByRegion(AddressSpace,
*BaseAddress,
tmpLength) != NULL)
{
DPRINT("Memory area already occupied\n");
if (!(Type & MEMORY_AREA_STATIC)) ExFreePoolWithTag(MemoryArea, TAG_MAREA);
return STATUS_CONFLICTING_ADDRESSES;
}
}
MemoryArea->StartingVpn = (ULONG_PTR)*BaseAddress >> PAGE_SHIFT;