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kaf24@firebug.cl.cam.ac.uk
3ad72f8da8
1. gdb_regs for 64bit, and macros to transfer regisers between ptrace
registers to gdb registers
2. xc_ptrace code building for 64bit
3. Implementation of new map_domain_va for 64bit
4. gdbserver-xen build configuration fixes for 64bit
From: Nitin Kamble
Signed-off-by: Keir Fraser <keir@xensource.com>
DomU GDB server for 32-bit (PAE and non-PAE) systems
----------------------------------------------------
Lines marked below with [*] are optional, if you want full
source-level debugging of your kernel image.
To build the GDB server:
1. Run ./gdbbuild from within this directory.
2. Copy ./gdb-6.2.1-linux-i386-xen/gdb/gdbserver/gdbserver-xen
to your test machine.
To build a debuggable guest kernel image:
1. cd linux-2.6.xx-xenU
2. make menuconfig
3. From within the configurator, enable the following options:
# Kernel hacking -> Compile the kernel with debug info [*]
-> Compile the kernel with frame pointers
4. (Re)build and (re)install your xenU kernel image.
To debug a running guest:
1. Use 'xm list' to discover its domain id ($domid).
2. Run 'gdbserver-xen 127.0.0.1:9999 --attach $domid'.
3. Run 'gdb /path/to/vmlinux-syms-2.6.xx-xenU'.
4. From within the gdb client session:
# directory /path/to/linux-2.6.xx-xenU [*]
# target remote 127.0.0.1:9999
# bt
# disass
To debug a crashed guest:
1. Add '(enable-dump yes)' to /etc/xen/xend-config.sxp before
starting xend.
2. When the domain crashes, a core file is written to
'/var/xen/dump/<domain-name>.<domain-id>.core'.
3. Run 'gdbserver-xen 127.0.0.1:9999 --file <core-file>'.
4. Connect to the server as for a running guest.