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Re: [Qemu-devel] segfault in current cvs


From: Fabrice Bellard
Subject: Re: [Qemu-devel] segfault in current cvs
Date: Tue, 06 Jan 2004 22:39:22 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624

Hi,

I made no tests of the current release of QEMU on PowerPC. I will try to debug it before releasing the 0.5.2 (during this week if everything is OK). Was the 0.5.1 working correctly with a Linux image ?

Fabrice.

Jens Axboe wrote:
Hi,

Tried to launch a win98 iso, but it segfaults right away. No matter what
I try, I get this:

address@hidden:[.]boe/qemu-cvs/i386-softmmu $ gdb ./qemu GNU gdb 6.0-debian
Copyright 2003 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you
are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for
details.
This GDB was configured as "powerpc-linux"...
(gdb) r -kernel ~axboe/bzImage-2.4.20
Starting program: /home/axboe/qemu-cvs/i386-softmmu/qemu -kernel
~axboe/bzImage-2.4.20
[New Thread 16384 (LWP 15913)]
warning: could not open /dev/net/tun: no virtual network emulation
Load kernel at 0x30183008 (0x00100000)

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 16384 (LWP 15913)]
cpu_x86_exec (env1=0x0) at /home/axboe/qemu-cvs/cpu-exec.c:323
323                         tb->cs_base = (unsigned long)cs_base;
(gdb) p tb
$1 = (TranslationBlock *) 0x0
(gdb) p cs_base
$2 = (uint8_t *) 0x0
(gdb)
which looks odd, given the !tb check just a few lines up. I'm using:

address@hidden:/home/axboe $ gcc --version
gcc (GCC) 3.3.3 20031229 (prerelease) (Debian)







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