kexec won't --load-panic a 2.6.22 relocatable kernel?

[Mike Snitzer]

On Mon, Mar 24, 2008 at 4:29 AM, Simon Horman <horms at verge.net.au> wrote:
>
> On Fri, Mar 21, 2008 at 02:32:36PM +0900, Simon Horman wrote:
>  > On Wed, Mar 19, 2008 at 02:05:46AM -0400, Mike Snitzer wrote:
>  > > I'm building a x86_64 2.6.22 kernel with the following options set:
>  > >
>  > > CONFIG_KEXEC=y
>  > > CONFIG_CRASH_DUMP=y
>  > > CONFIG_RELOCATABLE=y
>  > > CONFIG_PHYSICAL_START=0x200000
>  > >
>  > > If I try to load the kernel with the following I get:
>  > >
>  > > ./kexec --args-linux -p '--command-line=ro root=LABEL=/1 rhgb quiet
>  > > irqpoll maxcpus=1' --initrd=/boot/initrd-2.6.22.19.img
>  > > /boot/vmlinuz-2.6.22.19
>  > >
>  > > ./kexec: unrecognized option `--args-linux'
>  > > kexec-tools-testing 20080318-rc released 18th March 2008
>  > > Usage: kexec [OPTION]... [kernel]
>  > > ...
>  > > Cannot load /boot/vmlinuz-2.6.22.19
>  >
>  > Hi Mike,
>  >
>  > that looks a lot like a problem with kexec-tools parsing command line
>  > arguments to me. However I'm not having much luck reproducing it here.
>  > I'll poke a bit more.
>  >
>  > Did you get kexec-tools-testing 20080318-rc as a tarball from
>  > kernel.org? I just want to make sure we are looking at the same code.
>
>  Sorry for being a bit slow, I have managed to reproduce the problem,
>  which is that --args-linux can't be used if the image is a bzImage.
>  Could you try with a vmlinux image instead?

Interesting, makes sense.

Sure enough RedHat's image is a "ELF 64-bit LSB shared object" and a
vmlinux is "ELF 64-bit LSB executable".

I wonder how RedHat gets their kernel image to be an ELF image?

Mike