[pso] [tema2][win] Imi crapa KeSynchronizeRoutine

[Marius Nicolae]

Salut,

Scuze pentru mailul anterior, am apasat o combinatie nefericita de taste.

Reiau:

 La tema2 pe windows, pentru sincronizarea cu intreruperile incerc sa
 rulez in metoda de write a modulului, urmatoarea secventa de cod:


BOOLEAN sync_write(PVOID pServiceContext) {
	return TRUE;
}

 NTSTATUS uart_write(PDEVICE_OBJECT device, IRP *irp)
 {
         struct uart_dev *dev_id=(struct uart_dev*)device->DeviceExtension;
         KeSynchronizeExecution(dev_id->pIntObj, sync_write, NULL);
         IoCompleteRequest(irp, IO_NO_INCREMENT);
         return STATUS_SUCCESS;
}

Cand rulez test.exe, imi apare un blue screen si zice ca a aparut o
eroare la adresa 8081f0d3.
Dupa restart, am rulat kd.exe -z c:\windows\memory.dmp

ln 8081f0d3 zice:
(8081f0ce) nt!KeSynchronizeExecution+0x5 | (8081f0fe) nt!KiChainedDispatch

iar u 8081f0d3 zice:
nt!KeSynchronizeExecution+0x5:
8081f0d3 8a4b29          mov     cl,byte ptr [ebx+29h]
8081f0d6 ff15d0108080    call    dword ptr [nt!_imp_KfRaiseIrql (808010d0)]
8081f0dc 50              push    eax
8081f0dd ff742414        push    dword ptr [esp+14h]
8081f0e1 ff542414        call    dword ptr [esp+14h]
8081f0e5 8bd8            mov     ebx,eax
8081f0e7 59              pop     ecx
8081f0e8 ff15e4108080    call    dword ptr [nt!_imp_KfLowerIrql (808010e4)]


Alte precizari:

Pentru a initializa dev_id->pIntObject, in DriverEntry, am ceva de genul:

	for (i = 0; i < NCOM; ++i) {
		NTSTATUS status;
		KIRQL kIrql;
		KAFFINITY kAffinity;
		ULONG kVector;
		
		kVector = HalGetInterruptVector(Internal, 0, irq[i], 0, &kIrql, &kAffinity);
		status = IoConnectInterrupt(&devs[i].pIntObj, uart_interrupt_handle[i],
			&devs[i], NULL, kVector, kIrql, kIrql, Latched, TRUE, kAffinity, FALSE );
		if (!NT_SUCCESS(status)) {
		    DbgPrint("uart: can't get irq %d\n", irq[i]);
		    return status;
		}
	}

unde devs[i] a fost initializat asa:

        struct uart_dev *di;
	for(i=0; i < UART_MAX_MINORS; i++) {
		if ((ret=IoCreateDevice(driver, sizeof(*di), TO_UNICODE(dev_name,
&dev_uname),
			0xF0000000,0, FALSE, &device)) != STATUS_SUCCESS)
			goto error;
		di=(struct uart_dev*)device->DeviceExtension;
		di->com = i;
		devs[i] = *di;
       }

Mentionez ca am masina virtuala de pe site, care si-a facut update de
la microdoft, de curand.

Stie cineva care ar putea fi cauza?

Multumesc,
Marius NICOLAE