libthr: thr_create(2): no kernel stack?

[Mike Makonnen]

On Sat, 31 May 2003 00:22:59 -0700
Marcel Moolenaar <marcel at xcllnt.net> wrote:

> Gang,
> 
> I'm porting libthr to ia64 and reached a point where I can actually
> do initial testing. I immediately hit upon a snafu in thr_create(2).
> The second bcopy (ie sys/kern/kern_thr.c:159) is panicing because
> the new thread (td0) does not have a frame (ie td_frame == NULL).
> Creating a frame is obviously the thing to do, but there's no kernel
> stack created for the new thread AFAICT. Without kernel thread.
> cpu_set_upcall() will also fail if we ever reach that point.
> 
> Am I missing something here?

I just took a look at this and it _did_ look funny, but it seems to work on i386
so I did a little more digging and it seems that the stack frame is allocated in
the uma thread initialization routine thread_init(), which calls
cpu_thread_setup().  
This is currently undefined for ia64: ia64/ia64/vm_machdep.c: line 110

Cheers.
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