Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2025-08-03 17:56:00 +00:00
Code Issues Projects Releases Packages Wiki Activity

[NTVDM]

Browse source 
- Fix bugs in MemExceptionHandler, VDDInstallMemoryHook and VDDDeInstallMemoryHook where we must translate physical addresses to real ones and vice-versa.
- Give a first implementation of VDDAllocMem and VDDFreeMem.

svn path=/trunk/; revision=66829
This commit is contained in:
Hermès Bélusca-Maïto 2015-03-20 00:32:31 +00:00
parent d4b941d2c8
commit 114302b955
1 changed files with 75 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

89
reactos/subsystems/mvdm/ntvdm/memory.c
View file

@ -196,7 +196,7 @@ MemExceptionHandler(ULONG FaultAddress, BOOLEAN Writing)
ASSERT(FaultAddress < MAX_ADDRESS && Hook != NULL && Hook->hVdd != NULL);
/* Call the VDD handler */
Hook->VddHandler((PVOID)FaultAddress, (ULONG)Writing);
Hook->VddHandler(REAL_TO_PHYS(FaultAddress), (ULONG)Writing);
}
BOOL
@ -363,9 +363,9 @@ VDDInstallMemoryHook(IN HANDLE hVdd,
NTSTATUS Status;
PMEM_HOOK Hook;
ULONG i;
ULONG FirstPage = (ULONG_PTR)pStart >> 12;
ULONG LastPage = ((ULONG_PTR)pStart + dwCount - 1) >> 12;
PVOID Address = (PVOID)(FirstPage * PAGE_SIZE);
ULONG FirstPage = (ULONG_PTR)PHYS_TO_REAL(pStart) >> 12;
ULONG LastPage = ((ULONG_PTR)PHYS_TO_REAL(pStart) + dwCount - 1) >> 12;
PVOID Address = (PVOID)REAL_TO_PHYS(FirstPage * PAGE_SIZE);
SIZE_T Size = (LastPage - FirstPage + 1) * PAGE_SIZE;
PLIST_ENTRY Pointer;
@ -400,7 +400,10 @@ VDDInstallMemoryHook(IN HANDLE hVdd,
}
/* Decommit the pages */
Status = NtFreeVirtualMemory(NtCurrentProcess(), &Address, &Size, MEM_DECOMMIT);
Status = NtFreeVirtualMemory(NtCurrentProcess(),
&Address,
&Size,
MEM_DECOMMIT);
if (!NT_SUCCESS(Status))
{
if (Pointer == &HookList)
@ -430,9 +433,9 @@ VDDDeInstallMemoryHook(IN HANDLE hVdd,
NTSTATUS Status;
PMEM_HOOK Hook;
ULONG i;
ULONG FirstPage = (ULONG_PTR)pStart >> 12;
ULONG LastPage = ((ULONG_PTR)pStart + dwCount - 1) >> 12;
PVOID Address = (PVOID)(FirstPage * PAGE_SIZE);
ULONG FirstPage = (ULONG_PTR)PHYS_TO_REAL(pStart) >> 12;
ULONG LastPage = ((ULONG_PTR)PHYS_TO_REAL(pStart) + dwCount - 1) >> 12;
PVOID Address = (PVOID)REAL_TO_PHYS(FirstPage * PAGE_SIZE);
SIZE_T Size = (LastPage - FirstPage + 1) * PAGE_SIZE;
if (dwCount == 0) return FALSE;
@ -476,9 +479,39 @@ VDDAllocMem(IN HANDLE hVdd,
IN PVOID Address,
IN ULONG Size)
{
// FIXME
UNIMPLEMENTED;
return FALSE;
NTSTATUS Status;
PMEM_HOOK Hook;
ULONG i;
ULONG FirstPage = (ULONG_PTR)PHYS_TO_REAL(Address) >> 12;
ULONG LastPage = ((ULONG_PTR)PHYS_TO_REAL(Address) + Size - 1) >> 12;
SIZE_T RealSize = (LastPage - FirstPage + 1) * PAGE_SIZE;
if (Size == 0) return FALSE;
/* Fixup the address */
Address = (PVOID)REAL_TO_PHYS(FirstPage * PAGE_SIZE);
/* Be sure that all the region is held by the VDD */
for (i = FirstPage; i <= LastPage; i++)
{
Hook = PageTable[i];
if (Hook == NULL) return FALSE;
if (Hook->hVdd != hVdd)
{
DPRINT1("VDDAllocMem: Page %u owned by someone else.\n", i);
return FALSE;
}
}
/* OK, all the range is held by the VDD. Commit the pages. */
Status = NtAllocateVirtualMemory(NtCurrentProcess(),
&Address,
0,
&RealSize,
MEM_COMMIT,
PAGE_READWRITE);
return NT_SUCCESS(Status);
}
BOOL
@ -487,9 +520,37 @@ VDDFreeMem(IN HANDLE hVdd,
IN PVOID Address,
IN ULONG Size)
{
// FIXME
UNIMPLEMENTED;
return FALSE;
NTSTATUS Status;
PMEM_HOOK Hook;
ULONG i;
ULONG FirstPage = (ULONG_PTR)PHYS_TO_REAL(Address) >> 12;
ULONG LastPage = ((ULONG_PTR)PHYS_TO_REAL(Address) + Size - 1) >> 12;
SIZE_T RealSize = (LastPage - FirstPage + 1) * PAGE_SIZE;
if (Size == 0) return FALSE;
/* Fixup the address */
Address = (PVOID)REAL_TO_PHYS(FirstPage * PAGE_SIZE);
/* Be sure that all the region is held by the VDD */
for (i = FirstPage; i <= LastPage; i++)
{
Hook = PageTable[i];
if (Hook == NULL) return FALSE;
if (Hook->hVdd != hVdd)
{
DPRINT1("VDDFreeMem: Page %u owned by someone else.\n", i);
return FALSE;
}
}
/* OK, all the range is held by the VDD. Decommit the pages. */
Status = NtFreeVirtualMemory(NtCurrentProcess(),
&Address,
&RealSize,
MEM_DECOMMIT);
return NT_SUCCESS(Status);
}
BOOL