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Re: [Qemu-devel] Problem with QEMU on PPC

From: Helmar Wodtke
Subject: Re: [Qemu-devel] Problem with QEMU on PPC
Date: Sat, 06 Nov 2004 11:46:00 +0200

> Hi,
> On Thu, 4 Nov 2004, Helmar Wodtke wrote:
> > I want to run x86 code (more specific my FORTH at
> > http://www.printly.de/HelFORTH/ )  with user mode emulation on PPC
> > linux. I've made some debugging and figured out that the following code
> > (for fasm)
> > does not run:
> Means segmentation fault? Or does not start? Or does nothing?

It says:

address@hidden helforth04b $ bin/qemu-i386 hf
()<1234567qemu: uncaught target signal 11 (Segmentation fault) - exiting
address@hidden helforth04b $ bin/qemu-i386 test
qemu: uncaught target signal 11 (Segmentation fault) - exiting
address@hidden helforth04b $ 

The first command is my FORTH with some debugging code I added and "test" is 
the code I send in last mail. BTW: Does the segmentation fault message mean 
it's the emulator or it's the program?

> > x86/x86 works fine, so I think this is a bug in PPC version. Also "inc
> > dword [bla[" would work.
> Tip: Enable single stepping, enable all logging (or at least in_asm and
> cpu) and then compare between PPC and x86 host. You should get an idea
> which insn is causing the glitch.

How? Can you point me to documentation? I dont know structure of QEMU well - as 
far as I've seen there are a lot optimisations for PCC. I dont understand 
PPC-assembler and dont like to learn it for this problem (I would implement a 
C-FORTH instead...).

Bis dann,

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