Method HandlePageFault

pcsx2/vtlb.cpp:1498–1535

}

PageFaultHandler::HandlerResult PageFaultHandler::HandlePageFault(void* exception_pc, void* fault_address, bool is_write)
{
	pxAssert(eeMem);

	u32 vaddr;
	if (CHECK_FASTMEM && vtlb_GetGuestAddress(reinterpret_cast<uptr>(fault_address), &vaddr))
	{
		// this was inside the fastmem area. check if it's a code page
		// fprintf(stderr, "Fault on fastmem %p vaddr %08X\n", info.addr, vaddr);

		uptr ptr = (uptr)PSM(vaddr);
		uptr offset = (ptr - (uptr)eeMem->Main);
		if (ptr && m_PageProtectInfo[offset >> __pageshift].Mode == ProtMode_Write)
		{
			// fprintf(stderr, "Not backpatching code write at %08X\n", vaddr);
			mmap_ClearCpuBlock(offset);
			return HandlerResult::ContinueExecution;
		}
		else
		{
			// fprintf(stderr, "Trying backpatching vaddr %08X\n", vaddr);
			return vtlb_BackpatchLoadStore(reinterpret_cast<uptr>(exception_pc),
					   reinterpret_cast<uptr>(fault_address)) ?
					   HandlerResult::ContinueExecution :
					   HandlerResult::ExecuteNextHandler;
		}
	}
	else
	{
		// get bad virtual address
		uptr offset = reinterpret_cast<uptr>(fault_address) - reinterpret_cast<uptr>(eeMem->Main);
		if (offset >= Ps2MemSize::ExposedRam)
			return HandlerResult::ExecuteNextHandler;

		mmap_ClearCpuBlock(offset);
		return HandlerResult::ContinueExecution;
	}
}

// Clears all block tracking statuses, manual protection flags, and write protection.
// This does not clear any recompiler blocks.  It is assumed (and necessary) for the caller