On Tue, Jul 31, 2012 at 01:19:24AM -0400, Ben Gamari wrote: > Ben Gamari <bgamari.foss@xxxxxxxxx> writes: > > > Just to keep everyone in the loop, I've tried both VirtualBox and Qemu > > now and the Alps driver appears to work under neither. After some > > reflection, I finally resolved to brave the jungle that is Windows > > driver development and now have the beginnings of a PS/2 filter > > driver[1]. It's quite hacked together and is likely a textbook example > > of how not to write a Windows driver, but it's nearly working. That > > being said, if anyone has experience with NT kernel development, feel > > free to assist in any way you can. > > > > That being said, I'd recommend you don't install it at the moment; it > > currently BSODs from use of DebugPrint in an ISR. Before breaking it, > > however, I was able to get incoming data from the trackpad. The breaking > > changes were an attempt to gather outgoing commands to the device so I'm > > (hopefully) not far from having traces. > > > Sadly, this avenue of investigation is apparently a dead-end. After > seeing nothing outbound to the mouse and hacking around enough to > convince myself that filter driver is catching all traffic passed > through the i8042prt driver, I finally decided to disassemble > apfiltr.sys. Perhaps not unexpectedly, it seems they do some direct port > I/O without going through the driver stack. Whether this is incompetance > or malice we will never know, but it seems that the "clean" filter > driver approach will not work here. > > Thankfully, it seems that an I/O port sniffer driver[1] has been written > which might save me. Sadly, this isn't supported on 64-bit machines as > Microsoft's compiler inexplicably lacks support for inline assembler on > amd64. I've found a 32-bit copy of Vista lying around so we'll see how > this works. > > Of course, if anyone has any idea what might be breaking the > virtualization approach, I'd love to hear. Given how unwilling they are to share details of their protocol I would not be surprised if they tried to detect virtual environment on purpose. Thanks. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
