Qemu + gdb


 
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# 1  
Old 04-05-2011
Qemu + gdb

Hi, I got:

host machine: RedHat (RHEL6)
virtual machine: RedHat (RHEL6)

I run (on host machine):
qemu-system-x86_64 ...... -S -s

after that i run (on host machine):

gdb
target remote localhost:1234
set architecture i386:x86-64

and then i can use (on host machine) 'ctrl + c' to stop virtual machine and 'cont' to continue virtual machine.

Now, I created linux kernel module (in C) with:
asm("aa: jmp aa");

I insert that module to virtual machine. After that whole system stops (on asm("aa: jmp aa")). I would like to step debug after my module hangs.

Do you know the way how to do that?
Maybe how to modify next instructions?

Last edited by Chrisdot; 04-12-2011 at 08:14 AM..
# 2  
Old 04-05-2011
Are you doing this as root because adding a kernel module is a privileged instruction.
# 3  
Old 04-06-2011
I am root on host machine as well as on guest virtual machine.
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