From: Jonas Maebe <jonas.maebe@elis.ugent.be>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] KQEMU bus errors
Date: Sun, 13 Feb 2005 12:13:44 +0100 [thread overview]
Message-ID: <5538008c78eb9d182d41f6d73c7dbbc3@elis.ugent.be> (raw)
In-Reply-To: <1108287757.7619.7.camel@localhost.localdomain>
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
next prev parent reply other threads:[~2005-02-13 12:19 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-11 1:48 [Qemu-devel] KQEMU bus errors Darryl Dixon
2005-02-13 1:49 ` Julian Chesterfield
2005-02-13 2:17 ` Hetz Ben Hamo
2005-02-13 5:14 ` Brad Campbell
2005-02-13 9:42 ` Darryl Dixon
2005-02-13 11:13 ` Jonas Maebe [this message]
2005-02-13 14:10 ` Julian Seward
2005-02-13 14:51 ` Grzegorz Kulewski
2005-02-13 20:19 ` [Qemu-devel] Bus errors and /dev/shm -- was: " Darryl Dixon
2005-02-13 22:00 ` Filip Navara
2005-02-13 12:24 ` [Qemu-devel] " Phil Krylov
2005-02-13 2:37 ` Darryl Dixon
2005-02-13 2:44 ` Grzegorz Kulewski
2005-02-21 22:24 ` [Qemu-devel] " bri3d
2005-02-21 23:04 ` Hetz Ben Hamo
2005-02-21 23:30 ` Darryl Dixon
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