Re: Unused SI_LWP si_code definition ?

[Andrew Doran <ad%netbsd.org@localhost>]

On Wed, Oct 15, 2008 at 05:42:30PM +0200, Nicolas Joly wrote:

> While looking into existing si_code values, i discovered SI_LWP
> definition (src/sys/sys/siginfo.h). According to the corresponding
> comment it should be set by _lwp_kill(2), but it SI_USER is set
> instead ... So this value is currently unused.

It should have been SI_LWP. I have changed it.

> For compat linux NPTL emulation, i do need this functionality, where 2
> syscalls tkill and tgkill set up si_code to SI_TKILL. This value is
> needed by a handler in libpthread to switch a bit, allowing threads to
> be properly cancelled.
> 
> Is it ok to use it for compat linux ? If yes, don't we need to update
> _lwp_kill(2) accordingly ?

Do you want to change something outside of the Linux compat code? I'm
not sure what you're proposing to do.

Thanks,
Andrew