[PATCH] invalid instructions in kernel mode

Dan Malek dan at embeddededge.com
Fri Apr 1 04:15:57 EST 2005

On Mar 31, 2005, at 12:47 PM, Fillod Stephane wrote:

> When CPU has no (classic) FPU, and math emulation is disabled,
> fp instructions are not allowed in kernel mode.

FP Instructions are never allowed in kernel mode regardless of the CPU.
However, with math emulation disabled and no FPU, we still emulate
FP load/store operations because they are usually hard coded in
some of the context save/restore functions of the C library.

> This bug has been found with crashme (crash01) of LTP, on a e500 
> system.

What is the bug?  This patch disables a big feature we have been
using for many years.  Please take another look at this.


	-- Dan

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