SIGBUS on function return

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Article #41365

#41365

From: Jamie Burks
Date: Mon, 01 Apr 1996 00:00

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I am using gcc 2.7.2 built with gas and binutils 2.6 on HPUX 
10.01.  I am seeing some strange behavior with a function that 
returns a structure of two short ints.  Upon returning, to the 
caller the application is getting a SIGBUS, Bus error.  I 
stepped through the function that is being called and everything 
there is fine.  But as soon as it returns to the caller, SIGBUS.  
So I stepped through the return sequence instruction by 
instruction.  The instruction where the SIGBUS is generated is a 
stw.  This stw instruction is the one that is placing the 
returned structure into the callers structure.

Has anyone seen behavior similar to this?  Or, does anyone have 
any ideas/pointers as to what the trouble could be?  I'd really 
appreciate any help.

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From: Jamie Burks <jburks@mgate.lotus.com>
Subject: SIGBUS on function return
Date: 1996/04/01
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