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

[John Reiser <jreiser@BitWagon.com>]

Daniel Jacobowitz wrote:
> On Sun, May 06, 2007 at 09:04:52PM +0100, Thiemo Seufer wrote:
> 
>>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
> 
> 
> Someone might want to try:
>   http://lists.nongnu.org/archive/html/qemu-devel/2007-04/msg00514.html
> 

This works for me so far: I can single-step reliably in gdb.

--- a/qemu-0.9.0/target-mips/helper.c   2007-05-05 15:39:21.000000000 -0700
+++ b/qemu-0.9.0/target-mips/helper.c   2007-05-07 13:24:50.000000000 -0700
@@ -358,6 +358,7 @@
         goto set_EPC;
     case EXCP_BREAK:
         cause = 9;
+       tlb_flush_page(env, env->PC);
         goto set_EPC;
     case EXCP_RI:
         cause = 10;


-- 
John Reiser, jreiser@BitWagon.com