- paddr = MM_DuplicatePage( Addr );
- MM_DerefPhys( gaPageTable[Addr>>12] & ~0xFFF );
- gaPageTable[Addr>>12] &= PF_USER;
- gaPageTable[Addr>>12] |= paddr|PF_PRESENT|PF_WRITE;
+ if(MM_GetRefCount( gaPageTable[Addr>>12] & ~0xFFF ) == 1)
+ {
+ gaPageTable[Addr>>12] &= ~PF_COW;
+ gaPageTable[Addr>>12] |= PF_PRESENT|PF_WRITE;
+ }
+ else
+ {
+ paddr = MM_DuplicatePage( Addr );
+ MM_DerefPhys( gaPageTable[Addr>>12] & ~0xFFF );
+ gaPageTable[Addr>>12] &= PF_USER;
+ gaPageTable[Addr>>12] |= paddr|PF_PRESENT|PF_WRITE;
+ }
+