Using Floating Points in Drivers - how to recognize it?

NTDEV
1

Hello,

I am using external library in my driver and I’d like to know whether this library uses floating point operations. Is there any way I can check it during runtime or compile time?

May be, there is a way to disable floating point unit so that there will be crash or exception when trying to use floating point operation.

Any help will be appreciated.
Thanks.

2

Now way to tell at runtime other than randomly corrupting state… At compile time you may get a linker error for an undefined symbol, _fltused. Regardless, you can’t just repurpose a library written for um to be used in km, it needs to be targeted for km at the start.

d

dent from a phine with no keynoard

-----Original Message-----
From: xxxxx@wisair.com
Sent: Wednesday, March 23, 2011 2:36 AM
To: Windows System Software Devs Interest List
Subject: [ntdev] Using Floating Points in Drivers - how to recognize it?

Hello,

I am using external library in my driver and I’d like to know whether this library uses floating point operations. Is there any way I can check it during runtime or compile time?

May be, there is a way to disable floating point unit so that there will be crash or exception when trying to use floating point operation.

Any help will be appreciated.
Thanks.

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