[PATCH] add kexec_load() syscall

[maximilian attems]

Hello Andreas,

thank you very much for your guiding input and helpful comments.
resent proper built tested patch.

On Wed, May 23, 2012 at 10:58:24AM +0200, Andreas Jaeger wrote:
> 
> the first question is whether this should be really in glibc. With
> kexec-tools as only user, we should discuss a bit whether we extend
> the ABI like this.

installers are potential users as embedded boot loaders like kexecboot.
klibc supports kexec_load() syscall, but not the traditional syscall()
interface kexec-tools uses atm. Having this intelligence in libc
seems preferable.

 
> Regarding your contribution:
> we have some documentation about patches at
> http://sourceware.org/glibc/wiki/Contribution%20checklist .
> 
> Your patch misses a ChangeLog entry describing what you do, see the
> ChangeLog file for examples. You can generate entries with Ctrl-x 4
> a from emacs.

added.
 
> For larger changes, we would need the copyright assignment as well.
> Do you have one done?

Nope first time glibc touch, but this change as it is should/could be
trivial as just involving linux headers?
 
> system calls are added to syscalls.list. It looks like this call is
> available for all architectures, so you would add it to
> sysdeps/unix/sysv/linux/syscalls.list
> 
> With this prototype:
> > +kexec_load (void *entry, unsigned long nr_segments,
> > +		struct kexec_segment *segments, unsigned long flags)
> 
> The line to add would be:
> kexec_load EXTRA kexec_load i:pipi kexec_load
> 
> And then glibc would add the syscall automatically.

thanks indeed, it does!
 

-- 
maks