Inter-driver communication

I have 2 drivers, and want one driver to communicate with another driver. How
can I achieve that?

For example, I have 2 drivers: Driver1 and Driver2.

The purposes of Driver1 is to allocate non-paged memory which it uses for
reading/writing purposes.

Driver2 would like to read from the same memory address created by Driver1
previously. Driver2 can do that only after know from Driver1 the address of
non-paged memory. How that can be achieved?

Few assumptions

1) Driver1 is loaded before Driver2

2) Driver1 and Driver2 has to work separately.

3) Only Driver1 can allocated memory

4) There is no pre-defined or hard-coded memory address used by Driver1 for
allocating memory.

Please help!!!

In addition to Mr. Burn's advise, there are callbacks.
Read on ExCreateCallback, ExNotifyCallback.

-- pa/7


"Mohit Gupta" <> wrote in message
news:18823529-ECBB-4D5B-9D6E-...
> I have 2 drivers, and want one driver to communicate with another driver.
> How
> can I achieve that?
>
> For example, I have 2 drivers: Driver1 and Driver2.
>
> The purposes of Driver1 is to allocate non-paged memory which it uses for
> reading/writing purposes.
>
> Driver2 would like to read from the same memory address created by Driver1
> previously. Driver2 can do that only after know from Driver1 the address
> of
> non-paged memory. How that can be achieved?
>
> Few assumptions
>
> 1) Driver1 is loaded before Driver2
>
> 2) Driver1 and Driver2 has to work separately.
>
> 3) Only Driver1 can allocated memory
>
> 4) There is no pre-defined or hard-coded memory address used by Driver1
> for
> allocating memory.
>
> Please help!!!