Re: [Qemu-devel] KQEMU bus errors

[Jonas Maebe]

On 13 feb 2005, at 10:42, Darryl Dixon wrote:

> Most of the references that I can find for a Linux 'Bus error' talk 
> about unaligned memory accesses.

Indeed. The only way I know of to get a bus error under Linux/x86 from 
a user space program, is to turn on the alignment check flag in the 
eflags register, followed by an unaligned memory access.

Usually, this is the result from a corrupted stack, causing an invalid 
value to be restored to the eflags register (which coincidentally has 
the bit corresponding to the alignment check flag set to 1).


Jonas