FPU emulation broken in 2.6.28-rc8 ?

From: Rogier Wolff
Date: Wed Dec 17 2008 - 04:03:36 EST



Hi,

I'm getting messages similar to:

FPU emulator: unknown prefix byte 0x00,
FPU emulator: probably due to self-modifying code (emulation impossible)
FPU ........: internal error type 0x0126
At 00000017:0000
SW: b=1 st=0 es=1 sf=1 cc=0010 ef=111111
CW: ic=0 rc=00 pc=11 ien=0 ef=111111


(I cut-pasted the above from something I found on google, relating
to 2.4.7, where the FPU emulator was fixedin 2.4.8.
In my case "internal error" was 126, just like in '2001, In
my case I have "at 17:0", wwhereas in '01 it was reported "at
23:206". And the formatting changed a bit, which I corrected.
I don't have all the different flags available. If this doesn't
provide enough hints, I'll have to figure those out fro you again.

I'm trying to set up a thin client, which runs on a geode, which
apparently doesn't have a FPU.... (/proc/cpuinfo mentions the flag
"fpu", what does THAT mean?)

Oh, it seems as if some "state" is involved. booting init=/bin/bash
works, but allowing the system to boot a bit further leads to the
login shell (/bin/bash) getting killed due to the FPU emulator
problem....

Roger.

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