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[Bug 1001160] FIQ can trash stack when interrupting IRQ
- From: bugzilla-daemon at bugs dot ecos dot sourceware dot org
- To: unassigned at bugs dot ecos dot sourceware dot org
- Date: Wed, 9 Mar 2011 16:32:35 +0000
- Subject: [Bug 1001160] FIQ can trash stack when interrupting IRQ
- Auto-submitted: auto-generated
- References: <bug-1001160-777@http.bugs.ecos.sourceware.org/>
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--- Comment #5 from Morten Lave <ml@tctechnologies.tc> 2011-03-09 16:32:30 GMT ---
I agree that two options would be enough to cover most cases.
1) As is with the fix, FIQ morphs into IRQ.
2) FIQ is a VSR.
If someone needs to have FIQ not be disabled by the kernel they can do the
following:
- Redefine HAL_xxxxx_INTERRUP functions to not touch the F bit.
- Make a modified vectors.s which does not touch the F bit
My third suggestion was 2) combined with the FIQ disable fix but it might not
be generic enough to add as a CDL option.
I am not sure what the procedure is from here. Can you provide me with a link
describing how a bug report eventually results in a fix?
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