Re: [PATCH 00/12] add syscall tracepoints V3 - s390 arch update

Frederic Weisbecker
2009-08-25T19:52:11Z

On Tue, Aug 25, 2009 at 04:39:51PM +0200, Heiko Carstens wrote:
> On Tue, Aug 25, 2009 at 03:52:32PM +0200, Frederic Weisbecker wrote:
> > On Tue, Aug 25, 2009 at 02:31:11PM +0200, Hendrik Brueckner wrote:
> > > meta = find_syscall_meta((unsigned long)sys_call_table[i]);
> > > syscalls_metadata[i] = meta;
> > > }
> > We can even probably move most of this code to the core, expect the tiny parts
> > that rely on the arch syscall table.
> >
> > BTW, perhaps a silly question: would it be hard to have a generic syscall table
> > common to every archs?
>
> That would cause a lot of churn. Every architecture initializes the syscall
> table (two tables if CONFIG_COMPAT is enabled) differently.
> s390 also only uses 32 bit pointers in the system call table for 64 bit
> kernels, since we know that the functions are within the first 4GB.
> I don't think its worth the effort.

Ok.
Well I remembered about some projects of a unified syscall table but may be
it has been given up for such reasons.