Re: [Qemu-devel] bug: qemu-0.9.0 emulating mipsel (32-bit R3000) on amd64

[Thiemo Seufer]

John Reiser wrote:
> Hi,
> 
> qemu-0.9.0 compiled and running on Debian 2.6.18-4-amd64,
> [compiled by gcc (GCC) 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)],
> emulating Debian 2.6.18-4-qemu mipsel (32-bit MIPS R3000 little endian),
> errs when gdb 6.4.90-debian (running on the emulated mipsel)
> single-steps the user-mode instruction:
>       lw      a2,-44(s7)
> After single-stepping the 'lw', then register a2 contains garbage
> instead of the memory contents at address -44(s7).

This looks like another instance of "Qemu/MIPS doesn't handle
self-modifying code correctly" (the break instructions inserted
by gdb are exactly this).

A gross workaround is
http://lists.nongnu.org/archive/html/qemu-devel/2007-05/msg00037.html


Thiemo