Re: [Qemu-devel] /* XXX: suppress this hack */

[Pierre d'Herbemont]

Fabrice,

It doesn't really works. With the current cvs version built on Mac OS 
X/PowerPC I am not able to run the freedos test image nor the 
linux-test. Commenting out the optional registers in dyngen-exec.h [1] 
makes qemu working again.

Unfortunately, I don't have time to debug more.

Pierre.

[1]
--- dyngen-exec.h       12 Oct 2004 22:01:28 -0000      1.16
+++ dyngen-exec.h       16 Oct 2004 17:20:25 -0000
@@ -93,6 +93,7 @@
 #define AREG1 "r24"
 #define AREG2 "r25"
 #define AREG3 "r26"
+#ifdef __not_yet__
 #define AREG4 "r16"
 #define AREG5 "r17"
 #define AREG6 "r18"
@@ -101,6 +102,7 @@
 #define AREG9 "r21"
 #define AREG10 "r22"
 #define AREG11 "r23"
+#endif

Le 13 oct. 04, à 00:03, Fabrice Bellard a écrit :

> I commited a patch to fix the problem. Tell me if you see regressions 
> in the PowerPC host case. The x86 emulation on PowerPC should be 
> faster now.
>
> Fabrice.
>
> Johannes Schindelin wrote:
> > Hi,
> > On Mon, 11 Oct 2004, Johannes Schindelin wrote:
> > > Hi,
> > >
> > > On Sun, 10 Oct 2004, Magnus Damm wrote:
> > >
> > >
> > > > Yeah, registers "r3" to "r12" are "caller save", ie these registers 
> > > > must
> > > > be saved before a function is called. But what about "r16" to "r23",
> > > > these are currently only used when CONFIG_USER_ONLY is set - I 
> > > > thought
> > > > that they were supposed to be saved by the called function prior 
> > > > use,
> > > > "callee save". But how does that affect the softmmu code in a bad 
> > > > way
> > > > but the user code works? Any ideas?
> > >
> > > *scratcheshishead* I cannot think of one way that code should work 
> > > in user
> > > mode... IMHO there is no protection to those registers when calling 
> > > libc
> > > or a syscall.
> > I think I know why: the only calls made from this code 
> > (CONFIG_USER_ONLY)
> > are syscalls. As these happen in the kernel, no registers of the 
> > normal
> > user space are touched except for the return register, which is 
> > intended
> > to be changed. Am I right?
> > Ciao,
> > Dscho
> > _______________________________________________
> > Qemu-devel mailing list
> > address@hidden
> > http://lists.nongnu.org/mailman/listinfo/qemu-devel
>
>
>
>
> _______________________________________________
> Qemu-devel mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/qemu-devel