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need help on bus error problem

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Subject: need help on bus error problem
From: "Teresa Tao" <TERESAT@TTI-DM.COM>
Date: Sat, 25 Oct 2003 09:44:35 -0700
Original-recipient: rfc822;
Thread-index: AcObF0X0mItjLbcfQ4OzPzvO8C2f1w==
Thread-topic: need help on bus error problem
Hi there,

I am working on an real time video playback applicaion on a mips cpu. But after 
my video application play a while like 5 to 10 minutes, a bus error happened.

We add some debug meesage in the kernel, so we know that after the do_ade 
function inside the unalign.c, the bus error happens for the opcode lw or sw. 
So my guess is that I have an unaligned memory pointer(not in 4 byte boundary).
But my puzzle is that if I have an unaligned memory pointer, it should happen 
at the first loop I playback, how come it happens after it plays several loops?
Is there a possibility that my application's stack being trashed after a while? 
but I don't have recursive calls inside my application.

Thanks in advance!


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