FP register corruption in Exynos 4210 (Cortex-A9)
Russell King - ARM Linux
linux at arm.linux.org.uk
Wed Oct 8 01:35:09 PDT 2014
On Wed, Oct 08, 2014 at 05:19:19AM -0300, Lanchon wrote:
> for instance, you say that if an ISR uses the FPU it would corrupt user
> FP state. fine, but it is not that simple. what if the FPU was disabled
> at the time of interrupt? (ie: lazy restore did not yet happen in this
At that point, it depends on which kernel version you are using. Yes,
older kernels will just restore the state. Newer kernels will trap this
> a plausible answer (which i am making up out of the blue) would be:
If you want to continue asking questions and getting answers, change
your attitude; I am not a child.
You should also consider *not* writing essays, but instead ask clear,
direct and to the point questions - in other words, short emails. Not
everyone has the time or the patience to read huge long emails, or
huge rambling threads of 50+ pages on web forums.
FTTC broadband for 0.8mile line: currently at 9.5Mbps down 400kbps up
according to speedtest.net.
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