Date: Fri, 6 Aug 2010 12:54:36 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: freebsd-stable@freebsd.org, doconnor@gsoft.com.au Subject: Re: Kernel symbol file alternate location Message-ID: <20100806095436.GL22295@deviant.kiev.zoral.com.ua> In-Reply-To: <201008060729.o767TVFZ023996@lurza.secnetix.de> References: <50BEF58B-A155-4C46-B512-C94E0FD95D3E@gsoft.com.au> <201008060729.o767TVFZ023996@lurza.secnetix.de>
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On Fri, Aug 06, 2010 at 09:29:31AM +0200, Oliver Fromme wrote:
> Daniel O'Connor wrote:
> > On 06/08/2010, at 2:38, Oliver Fromme wrote:
> > > > I think this is the main reason / has had to grow - the actual ker=
nel
> > > > is relatively small so even a 256Mb / could hold several, but with
> > > > the symbol files it is not possible.
> > >=20
> > > I think a very simple solution would be to install the symbol
> > > files elsewhere (probably configurable via make.conf), and
> > > install symlinks in the kernel directory. If you do this,
> > > tools using the symbol files won't have to be changed.
> > >=20
> > > This would probably be a fairly trivial change to the install-
> > > kernel target, I guess. I don't have patches, though.
> >=20
> > Yeah, I don't think it's hard to move them, however I'm worried what
> > it will break :)
> >
> > The only thing I can see that would have to change would be kgdb so
> > it tells gdb where to find the symbols.
>=20
> That's why I suggested to place symlinks in the kernel
> directory. No change to kgdb necessary.
>=20
> It might even be possible to not install the symbol files
> at all, but keep them under /usr/obj, so the installkernel
> target would have to do nothing more than create symlinks.
> This could be controlled by a make.conf variable, like
> SYMLINK_SYMBOLS=3DYES ("NO" would be the existing behaviour
> of installing the actual symbol files in /boot/kernel).
If you keep /usr/obj around, you do not need symbol files at all,
and INSTALL_NODEBUG?=3Dtrue in make.conf is enough. You can always
use kernel.debug and modules with debugging symbols from build
directory for kgdb.
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