Re: CVS commit: src/lib/librumphijack

[Antti Kantee <pooka%cs.hut.fi@localhost>]

On Tue Feb 08 2011 at 22:00:49 +0100, Joerg Sonnenberger wrote:
> On Tue, Feb 08, 2011 at 03:34:54PM -0500, Christos Zoulas wrote:
> > Still the problem remains, how do we stack the calls to insert the ssp
> > check at the top level, without resorting to rtld tricks?
> 
> Let me try to summarize the situation to make sure I get it right:
> 
> The fortification code wants to provide an inline function "read" that
> calls the real "read" after doing the argument checks.
> 
> rumphijack wants to override the "read" symbol, apply some magic and
> call "_sys_read" for the real system call.

No, it wants to override "whatever is the symbol applications are
resolved to".  For -current this is "_sys_read" (on nb5 it's "read").

And, on a tangent, it would really help if we had some mechanism for
"latest version of symbol exported by libc" (cf. mess with select,
pollts, kevent and socket).  For working compat, I guess we'd need to
bump rumphijack major every time one of them changes, but I can't think
of a good mechanism for an application to automatically select the major
that needs to be used.

-- 
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