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[NTOS/MM]

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- Handle various special cases in NtQueryVirtualMemory (e.g. querying illegal virtual addresses, shared memory area, etc). Example of an app doing this - OllyDbg.

svn path=/trunk/; revision=49277
This commit is contained in:
Aleksey Bragin 2010-10-25 20:50:45 +00:00
parent 71ab4ed50f
commit f46ca6e613
1 changed files with 48 additions and 6 deletions
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54
reactos/ntoskrnl/mm/ARM3/virtual.c
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@ -2329,9 +2329,34 @@ NtQueryVirtualMemory(IN HANDLE ProcessHandle,
if ((BaseAddress > MM_HIGHEST_VAD_ADDRESS) ||
(PAGE_ALIGN(BaseAddress) == (PVOID)USER_SHARED_DATA))
{
/* FIXME: We should return some bogus info structure */
UNIMPLEMENTED;
while (TRUE);
Address = PAGE_ALIGN(BaseAddress);
/* Make up an info structure describing this range */
MemoryInfo.BaseAddress = Address;
MemoryInfo.AllocationProtect = PAGE_READONLY;
MemoryInfo.Type = MEM_PRIVATE;
/* Special case for shared data */
if (Address == (PVOID)USER_SHARED_DATA)
{
MemoryInfo.AllocationBase = (PVOID)USER_SHARED_DATA;
MemoryInfo.State = MEM_COMMIT;
MemoryInfo.Protect = PAGE_READONLY;
MemoryInfo.RegionSize = PAGE_SIZE;
}
else
{
MemoryInfo.AllocationBase = (PCHAR)MM_HIGHEST_VAD_ADDRESS + 1;
MemoryInfo.State = MEM_RESERVE;
MemoryInfo.Protect = PAGE_NOACCESS;
MemoryInfo.RegionSize = (ULONG_PTR)MemoryInfo.AllocationBase - (ULONG_PTR)Address;
}
/* Return the data (FIXME: Use SEH) */
*(PMEMORY_BASIC_INFORMATION)MemoryInformation = MemoryInfo;
if (ReturnLength) *ReturnLength = sizeof(MEMORY_BASIC_INFORMATION);
return STATUS_SUCCESS;
}
/* Check if this is for a local or remote process */
@ -2395,9 +2420,26 @@ NtQueryVirtualMemory(IN HANDLE ProcessHandle,
/* Calculate region size */
if (Vad)
{
/* We don't handle this yet */
UNIMPLEMENTED;
while (TRUE);
if (Vad->StartingVpn >= BaseVpn)
{
/* Region size is the free space till the start of that VAD */
MemoryInfo.RegionSize = (ULONG_PTR)(Vad->StartingVpn << PAGE_SHIFT) - (ULONG_PTR)Address;
}
else
{
/* Get the next VAD */
Vad = (PMMVAD)MiGetNextNode((PMMADDRESS_NODE)Vad);
if (Vad)
{
/* Region size is the free space till the start of that VAD */
MemoryInfo.RegionSize = (ULONG_PTR)(Vad->StartingVpn << PAGE_SHIFT) - (ULONG_PTR)Address;
}
else
{
/* Maximum possible region size with that base address */
MemoryInfo.RegionSize = (PCHAR)MM_HIGHEST_VAD_ADDRESS + 1 - (PCHAR)Address;
}
}
}
else
{