Re: SMP Sparc64 : bug in clone?

On Mon, 6 May 2002 10:25:14 -0400 (EDT)
Noah Beck <[email protected]> wrote:

> On Sun, 5 May 2002, Erik de Castro Lopo wrote:
> 
> > Should I be subtract 2047 bytes (unlikely) or 2047 * sizeof (void*) bytes?
> 
> The stack bias is in bytes, not words.

OK, I tried this:

    #define  STACK_SIZE (1<<15)

    static void* stack [STACK_SIZE] ;

    stack = stack [STACK_SIZE/2] ;
    stack = ((char*) stack) - 2047 ;

and still no go (although it did work with the CLONE_VM flag).

> Does the minimum space for a stack frame (176 bytes) need to be subtracted
> as well?  

Since I'm starting in the middle of a large array, fiddle factors like this
shouldn't be an issue.

> Also, is CANRESTORE=0 in the new thread?

Now thats a possibility. Isn't this supposed to be set up somewhere inside 
the clone() system call?

Erik
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