[Webkit-unassigned] [Bug 48742] Misaligned memory access in CloneDeserializer on ARM (v7)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=48742





--- Comment #3 from Kimmo Kinnunen <kimmo.t.kinnunen at nokia.com>  2010-11-02 11:08:51 PST ---

> > > Window/window-postmessage-clone.html --> bus error crash
> > 
> > This test should be on the skipped list for Qt (missing eventSender.beginDragWithFiles).
> 
> The crash occurs with the actual when opening the file with a browser.

Apparently ARMv7 shouldn't be able to do multi-word unaligned reads. If it does, your kernel probably does the fixups and restores the control. This is probably as slow as it sounds (kernel trap) and should be fixed in userland code. 

You can cat /proc/cpu/alignment to see the fixups.

http://wiki.debian.org/ArmEabiFixes

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