Re: CVS commit: src/lib/librumphijack

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

On Tue Feb 08 2011 at 23:22:44 +0200, Antti Kantee wrote:
> 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").

umph, for this case it's always _sys_read since read is just an alias
for _sys_read on all branches.  However, on -current application linkage
"skips" read() (apparently due to the ssp magic).

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