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Full Discussion: Qemu + gdb
Top Forums Programming Qemu + gdb Post 302510974 by Chrisdot on Tuesday 5th of April 2011 11:38:24 AM
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..
 

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fence_cpint(8)						      System Manager's Manual						    fence_cpint(8)

NAME
fence_cpint - I/O Fencing agent for GFS on s390 and zSeries VM clusters SYNOPSIS
fence_cpint [OPTION]... DESCRIPTION
fence_cpint is an I/O Fencing agent used on a virtual machine running GFS in a s390 or zSeries VM cluster. It uses the cpint package to send a CP LOGOFF command to the specified virtual machine. For fence_cpint to execute correctly, you must have the cpint module installed, and hcp in your PATH. NOTE: for fence_cpint to send a command to another virtual machine, the machine executing it must either be a privi- lege class C user or it must be the secondary user of the virtual machine to be fenced. This means that unless all of you GULM server nodes are privilege class C, fence_cpint can only be used with SLM. fence_cpint accepts options on the command line as well as from stdin. fence_node sends the options through stdin when it execs the agent. fence_cpint can be run by itself with command line options which is useful for testing. Vendor URL: http://www.ibm.com OPTIONS
-h Print out a help message describing available options, then exit. -u userid userid of the virtual machine to fence (required). -q quiet mode, no output. -V Print out a version message, then exit. STDIN PARAMETERS
agent = < param > This option is used by fence_node(8) and is ignored by fence_cpint. userid = < parm > userid of the virtual machine to fence (required). SEE ALSO
fence(8), fence_node(8) fence_cpint(8)
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