16th March 2006: kgdb 2.4 for 184.108.40.206 kernel is available from the downloads page.The kgdb ethernet interface also works fine with this version.
2005: kgdb 2.3 for 2.6.13 kernel is available from the downloads page.The kgdb ethernet interface works fine.
2004: kgdb 2.2 for 2.6.7 kernel is available from the downloads page.
19th March 2004: A gdb
for automatic loading of modules in 2.6 kernels has been uploaded to downloads page. Module debugging for 2.6
kernels works only with development version of kgdb for now.
11th February 2004:
Setup a cvs tree for development of kgdb on 2.6 kernels. More
information at this page. Latest development
version of kgdb can be availed using cvs.
21st January 2004:
kgdb 2.1.0 for
kernel 2.6.1[i386,x86_64,ppc] with a powerpc patch.
20th January 2004:
kgdb 2.0.5 for
kernel 2.6.1[i386,x86_64] with fixes and several changes in kgdb
ethernet interface. The kgdb ethernet interface works to some extent.
17th January 2004:
kgdb 1.6 for redhat kernel 2.4.20-19.9.
kgdb 2.0.4 for kernel 2.6.1[i386,x86_64] with cleanups and
restructuring of code.
16th January 2004:kgdb 2.0.3 for kernel 2.6.1[i386,x86_64] with some fixes to core and
ethernet interface. Ethernet interface is still under development.
12th January 2004:kgdb 2.0.2 for kernel 2.6.1[i386,x86_64] with some fixes and
restructuring in core kgdb and ethernet interface.
10th January 2004:
kgdb 2.0.1 for kernel 2.6.1[i386,x86_64] is
available. I have started merging the ethernet interface. It's not
7th January 2004: kgdb
2.0 for kernel 2.6.0 for architectures i386 and x86_64 is available
from downloads page. This version features
automatic loading of modules in gdb and a
changed kgdb kernel command line options (kgdbwait
26th December 2003:
kgdb 1.6 for x86_64 released. Special instructions for x86_64 port
at this page.
23rd December 2003:
kgdb 1.9 with automatic loading of modules in gdb and better kernel
stack traces for kernel 2.4.23.
19th December 2003:
kgdb 1.8 for kernel 2.4.23 with experimental support for powerpc
processors. It has been integrated with x86 kgdb, hence all features of
x86 kgdb are available including thread support. Some documentation
is available for powerpc kgdb.
kgdb 1.6 for redhat enterprise linux 3.0 kernel.
9th December 2003:
kgdb 1.7 for kernel 2.4.23 with hasslefree gdb detach reattach
and restructured code for merging kgdbs of other architectures.
10th November 2003:
kgdb for redhat 9.0 kernel is available from downloads
2nd August 2003: kgdb
for redhat update kernel 2.4.20-18.7 is available from downloads page.
Procedure for using modules loaded into a kernel without using kgdb
loadmodule.sh script has been added on loading
a module file in gdb page. With a newly added script getsyms.sh, you can extract the information
needed by gdb to debug a module from a running kernel.
30th July 2003: kgdb
for 2.4.20 kernel is available from downloads
26th January 2003:
Enhanced kgdb to support gdb 'Z' packet. With this packet kgdb
stores breakpoint information inside the kernel instead of gdb. With
this feature breakpoints won't result in unexpected behavior when
gdb dies. Fixed console output through gdb.
4th January 2003: kgdb
for redhat 7.3 kernel available from the downloads
22nd December 2002:
kgdb for redhat 8.0 kernel available from the downloads
19th November 2002:
Starting work on lan based kgdb. I'll release a new patch asap.
26th July 2002: V.
Ganesh has written a kgdb stub on ibm s390
25th April 2002: Fixed
bugs in script loadmodule.sh .
1st April 2002 :
kgdb for kernel 2.4.18 .
29th Marh 2002: kgdb
1.5 with reworked buggy smp handling. Previous kgdb had a bug which
caused it to hang when a processor spun with interrupts disabled and
another processor enters kgdb. kgdb now uses nmi watchdog for
holding other processors while a machine is in kgdb.
20th March 2002: Added
documentation on thread analysis .
13th March 2002: kgdb
1.4 with fixes in the definition of KA_HELD_GLK and DO_BUG.
15th January 2002:
kgdb for redhat 7.2 kernel is available from
13th January 2002:
kgdb 1.3 with fixes for a bug in the definition of KA_HELD_GKL and a
compilation problem in the definition of schedule(). kgdb is now
available for 2.4.16 kernel.
16 October 2001: Added
documentation on debugging an init_module
9 October 2001: kgdb
1.2 with fix a compilation problem in arch/i386/kernel/i386_ksyms.c
for 2.4.10 kernels. I have also started using kgdb-bugreport mailing
http://lists.sourceforge.net/lists/listinfo/kgdb-bugreport ) for
2 October 2001: kgdb
for linux kernel 2.4.10 is available from the
30 September 2001:
Fixed incorrect ESP reported in threads and improved page fault
22 August 2001:
Revised documentation. Added more information on troubleshooting.
Fixed a broken link on the downloads page.
12 August 2001: In
response to requests from many people, I have prepared a kgdb patch
for linux kernel with Redhat 7.1. It is available from downloads page. Some documentation is revised.
kgdb patches now have a naming convention to identify kgdb features
available in a patch easily.
5 August 2001: Help
for kernel asserts didn't appear because of a problem in Configure.help
file. Fixed it. Revised some documentation.
29 July 2001: Fixed
problems with CONFIG_KGDB_THREAD option. Revised some documentation.
Completed documentation for stack trace: Stack
trace and Inline functions .
27 July 2001: Added
some documentation. Added a webpage
Unloading a module and loading it again .
24 July 2001: Fixed
errors reported on compiling a debug kernel when CONFIG_KGDB_THREAD
is disabled. Added a troubleshooting related web page.
22 July 2001:
Restructured the kgdb webpage for better readability and added
extensive documentation. The documentation is still being being
written. It will be available on the kgdb webpage as soon as I
finish it. Incomplete documentation is marked in italics.
kgdb for linux kernel
2.4.6 is available from the downloads page.
It has following improvements over kgdb for 2.4.3 kernel.
2001: kgdb for 2.4.5 with the same functionalities as kgdb for 2.4.3
Enhanced kgdb with kgdb and kernel asserts .
configuration option for thread analysis. The configuration
option enables code required for thread analysis which is
disabled by default to of the overhead it causes.
Modified semaphore handling functions so that knowing where a thread is
waiting on a semaphore is easier.
kgdb for 2.4.3 kernel had following improvements over kgdb for 2.4.2
Changed #ifdef __SMP__ statements to #ifdef
Removed EXTRAVERSION=-kgdb line from the Makefile. This had
caused change in the name of the kernel. It was inconvenient in
some setups. If name of the kernel was already changed, the
patch would fail at this line.
kgdb for 2.4.2 kernel had following improvements over previous
Registers for all threads: Registers for a thread can now be got by
using info registers command in gdb. Exact state of a
thread is known with availability of registers alongwith a stack
top function in a stack trace: Ealier version of kgdb showed schedule
as the top function in a stacktrace for threads which are waiting on
some event. Now the function that calls schedule
function is shown as the top function. This allows knowing kernel
state quickly by having a glance at output of info threads
Improvements to nmi-watchdog handling: kgdb can now handle nmi-watchdog
well. The kernel doesn't hang even if multiple processors enter
nmi-watchdog at the same time. All processors, running with or
without interrupts are held by the debugger during the time a
kernel is being analyzed. The kernel enters debugger without
declaring a panic on nmi-watchdog. Hence stat of the kernel can
be analyzed well even on nmi-watchdog occarance.