[Qemu-devel] Solaris Linux x86 binary compatibility

[Qemu-devel] Solaris Linux x86 binary compatibility

[Peter Firmstone]

Hi,

You may have heard of Janus, the Solaris x86 compatibility layer to run
x86 linux binaries.  It is now renamed brandz and is available at the
OpenSolaris web site:

http://www.opensolaris.org/os/community/brandz

Basically it has the ability to create a linux runtime environment using
linux system libraries in a Solaris container.  It only works on Solaris
x86.

It might be possible to create a similar linux x86 runtime environment
on Solaris SPARC using QEMU's Linux user space emulator.

Any thoughts?

Regards,

Peter.

[Qemu-devel] [PATCH] gdbstub.c fix for SIGINT

[Jason Wessel]

[-- Attachment #1: Type: text/plain, Size: 650 bytes --]

Attached is a patch to add the case for interrupting the gdbstub and 
sending the correct signal to gdb.

The gdb serial protocol states that if you interrupt the stub with a 
"control-c" in gdb that it should stop with S02 (SIGINT) to indicate 
that it was interrupted.   I also added the tlb flush so that 
breakpoints can be written in correctly.  I found that if I ran a 
pentium qemu instance and broke in with gdb and planted a breakpoint at 
do_fork() that it was not immediately hit due to the lack of the 
flush.   With the patch, it reliably stops all the time now when a 
breakpoint is planted after interrupting the stub.

Thanks,
Jason.

[-- Attachment #2: gdbstub.c.patch --]
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Index: Changelog
===================================================================
RCS file: /sources/qemu/qemu/Changelog,v
retrieving revision 1.111
diff -u -r1.111 Changelog
--- Changelog	12 Apr 2006 21:09:31 -0000	1.111
+++ Changelog	17 Apr 2006 13:05:57 -0000
@@ -2,6 +2,7 @@
 
   - USB tablet support (Brad Campbell, Anthony Liguori)
   - win32 host serial support (Kazu)
+  - Fix SIGINT handler for gdbstub
 
 version 0.8.0:
 
Index: gdbstub.c
===================================================================
RCS file: /sources/qemu/qemu/gdbstub.c,v
retrieving revision 1.34
diff -u -r1.34 gdbstub.c
--- gdbstub.c	5 Dec 2005 19:55:19 -0000	1.34
+++ gdbstub.c	17 Apr 2006 13:05:57 -0000
@@ -654,6 +654,9 @@
     if (reason == EXCP_DEBUG) {
 	tb_flush(s->env);
         ret = SIGTRAP;
+    } else if (reason == EXCP_INTERRUPT) {
+        tb_flush(s->env);
+        ret = SIGINT;
     }
     else
         ret = 0;

Re: [Qemu-devel] [PATCH] gdbstub.c fix for SIGINT

[Mulyadi Santosa]

Hi...

> Attached is a patch to add the case for interrupting the gdbstub and
> sending the correct signal to gdb.

Excellent. I haven't tested by myself, but could you test your patch 
together with Andre Pech's patch that I put in 
http://qemu.dad-answers.com/viewtopic.php?p=2809#2809? 

BTW, Paul brook also put a patch related with breakpoint TLB 
invalidation in 
http://cvs.savannah.gnu.org/viewcvs/qemu/qemu/exec.c.diff?tr1=1.74&tr2=1.75&r1=text&r2=text 
(from Paul Brook's posting at qemu-devel on April 9th 2006 )

I think it would be great if these patch combo can finally squashed the 
gdbstub bug related to missed breakpoints once and for all.

regards

Mulyadi