Re: cvs commit: src/lib/libpthread/arch/ia64/ia64 context.S

From: Daniel Eischen <eischen_at_vigrid.com>
Date: Fri, 27 Jun 2003 06:50:21 -0400 (EDT)
On Thu, 26 Jun 2003, Marcel Moolenaar wrote:
> marcel      2003/06/26 23:15:13 PDT
> 
>   FreeBSD src repository
> 
>   Modified files:
>     lib/libpthread/arch/ia64/ia64 context.S 
>   Log:
>   Implement _ia64_save_context() and _ia64_restore_context(). Both
>   functions are derived from the swapctx() and restorectx() (resp)
>   from sys/ia64/ia64/context.s. The code is expected to be 99%
>   correct, but has not yet been tested.
>   
>   Note that with these functions operating on mcontext_t, we also
>   created the foundation upon which we can implement getcontext(2)
>   and setcontext(2) replacements. It's not guaranteed that the use
>   of these syscalls and _ia64_{save|restore}_context() on the same
>   uicontext_t is actually going to work. Replacing the syscalls is
>   now trivially achieved.

For libkse anyways, [gs]etcontext(2) (or library versions of them)
are only used when delivering signals, and even then only under
certain circumstances (when signals are deferred due to being
in critical regions, I think).  So there shouldn't really be
any impact for not having userland versions of these syscalls.
Not that I'd want to stop anyone from implementing them... :-)

>   This commit completes the ia64 port of libpthread itself (modulo
>   testing and bugfixes).

Yay!  Nice job :-)

-- 
Dan Eischen
Received on Fri Jun 27 2003 - 03:50:22 UTC