dtrace discuss - Sep 2007 - Fwd: [osol-code] LOADABLE and LOADED syscalls

---------- Forwarded message ----------
From: ?? TaoJie <eulertao at gmail.com>
Date: 2007-9-10 ??9:03
Subject: Re: [osol-code] LOADABLE and LOADED syscalls
To: James Carlson <james.d.carlson at sun.com>
Cc: opensolaris-code at opensolaris.org

thank you, James.

Then, in DTrace, loadable syscall modules are responsed by fbt provider, not
the syscall provider, aren''t they?


Regards,
TJ


2007/9/10, James Carlson <james.d.carlson at
sun.com>:
>
> ?? TaoJie writes:
> > in systm.h, there''s:
> > #define LOADABLE_SYSCALL(s) (s->sy_flags & SE_LOADABLE)
> >
> >
> > A syscall is LOADABLE if its sy_flags is set as SE_LOADABLE.
> > err... Then what does LOADABLE mean? What are the differences between
> normal
> > syscalls (e.g. read, write, exec) and LOADABLE syscalls ( e.g. syscall
> 67,
> > 68, 69)?
>
> Loadable syscalls have implementations in separate modules --
> generally located in /kernel/sys{,/$ISA} -- and named based on
> /etc/name_to_sysnum and with SYSENT_LOADABLE() in the sysent[] array.
> They get loaded into the kernel on demand.
>
> --
> James Carlson, Solaris Networking              <james.d.carlson at
sun.com>
> Sun Microsystems / 1 Network Drive         71.232W   Vox +1 781 442 2084
> MS UBUR02-212 / Burlington MA 01803-2757   42.496N   Fax +1 781 442 1677
>
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On Mon, Sep 10, 2007 at 09:40:47PM +0800, ???? TaoJie
wrote:
> Then, in DTrace, loadable syscall modules are responsed by fbt provider,
not
> the syscall provider, aren''t they?
Nearly all kernel functions are visible with the fbt provider. Loadable
system calls should appear in the syscall provider.

Adam

-- 
Adam Leventhal, FishWorks                        http://blogs.sun.com/ahl