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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: ecos-bugs at ecos dot sourceware dot org
- Date: Wed, 23 Feb 2011 11:02:32 +0000
- Subject: [Bug 1001160] FIQ can trash stack when interrupting IRQ
- Auto-submitted: auto-generated
- References: <bug-1001160-13@http.bugs.ecos.sourceware.org/>
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John Dallaway <john@dallaway.org.uk> changed:
What |Removed |Added
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CC| |john@dallaway.org.uk
--- Comment #1 from John Dallaway <john@dallaway.org.uk> 2011-02-23 11:02:28 GMT ---
Morten and Brian, thank you for the bug report. Your explanation of the problem
makes good sense to me.
The proposed fix adds 2 instructions to the default IRQ VSR which should only
be necessary when using both IRQ and FIQ interrupt sources. I this an optimal
fix? Is it worth including these extra instructions conditionally based on a
CDL interface which could be implemented by any eCos hardware driver package?
Comments requested from the ARM experts please.
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