context questions

Hi,

I'm developing a driver for PPC 2003. The driver is loaded in device.exe
address space and is located in slot 0. During Driver_Init I allocate a
memory and save a pointer in a global variable in the driver. Whenever an
application opens the driver, I need to save some information in the memory.

1) In Driver_Open call of the driver, I'm in the application context, not
device.exe context, right?
2) If 1) is true, how can I access the memory which is allocated in
Driver_Init which is in device.exe context? Do I have to add the pointer
with a base address of the slot of device.exe and call MapPtrToProcess?

TIA


.

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