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Added special case to NtQueryVirtualMemory to handle Forza Motorsport bug -- backported from Dxbx, where issue was resolved by PatrickvL

This commit is contained in:
Echelon9 2013-04-08 23:22:30 +10:00
parent 406795b743
commit 0e937af7ff
1 changed files with 23 additions and 2 deletions
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25
src/CxbxKrnl/EmuKrnl.cpp
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@ -3457,8 +3457,29 @@ XBSYSAPI EXPORTNUM(217) xboxkrnl::NTSTATUS NTAPI xboxkrnl::NtQueryVirtualMemory
0
);
if(FAILED(ret))
EmuWarning("NtQueryVirtualMemory failed!");
if(FAILED(ret)) {
EmuWarning("NtQueryVirtualMemory failed (%s)!", NtStatusToString(ret));
// Bugfix for "Forza Motorsport", which iterates over 2 Gb of memory in 64kb chunks,
// but fails on this last query. It's not done though, as after this Forza tries to
// NtAllocateVirtualMemory at address 0x00000000 (3 times, actually) which fails too...
//
// Ported back from dxbx, translator PatrickvL
if (BaseAddress == (PVOID)0x7FFF0000) {
Buffer->BaseAddress = BaseAddress;
Buffer->AllocationBase = BaseAddress;
Buffer->AllocationProtect = PAGE_READONLY;
Buffer->RegionSize = 64 * 1024; // size, in bytes, of the region beginning at the base address in which all pages have identical attributes
Buffer->State = 4096; // MEM_DECOMMIT | PAGE_EXECUTE_WRITECOPY etc
Buffer->Protect = PAGE_READONLY; // One of the flags listed for the AllocationProtect member is specified
Buffer->Type = 262144; // Specifies the type of pages in the region. (MEM_IMAGE, MEM_MAPPED or MEM_PRIVATE)
ret = STATUS_SUCCESS;
DbgPrintf("EmuKrnl (0x%X): NtQueryVirtualMemory: Applied fix for Forza Motorsport!\n", GetCurrentThreadId());
}
}
EmuSwapFS(); // Xbox FS