Re: i386-rtems setjmp.h patch

[Joel Sherrill <joel dot sherrill at OARcorp dot com>]

"J. Johnston" wrote:
> 
> Joel Sherrill wrote:
> > I don't claim to fully understand why the i386 has such a complicated
> > path to figuring out _JBLEN but it didn't work for rtems.  Honestly I
> > am not sure if using setjmp-dj.h gets everything defined for targets
> > that
> > use that either.
> 
> It does.  You'll see that the jmp_buf is defined already and so we
> don't redefine it.  The problem is when we fall into the last part
> which is enabled for CYGWIN and __rtems__ that needs the _JBLEN macro
> to be set.

That sounds like what we were seeing since it actually a sigsetjmpbuf
problem.

> It looks like _JBLEN of 9 is what that structure is
> > accomplishing.  Anyway i386-rtems targets need this one.  Please
> > commit it.
> >
> 
> Do you mean 9 ints or do you mean 36 ints?  Because _JBTYPE is undefined,
> it will declare _JBLEN ints.

The assembly only saves 9 registers so we mean 9 ints.  We are using
the machine/i386/setjmp.S.

> -- Jeff J.
> 
> > 2002-12-06    Joel Sherrill <joel@OARcorp.com>
> >
> >       * libc/include/machine/setjmp.h: Make sure _JBLEN is defined
> >       for i386-rtems targets.
> >
> > diff -uNr
> > /usr1/rtems/work-tools/original/newlib-1.10.0/newlib/libc/include/machine/setjmp.h
> > newlib-1.10.0/newlib/libc/include/machine/setjmp.h
> > ---
> > /usr1/rtems/work-tools/original/newlib-1.10.0/newlib/libc/include/machine/setjmp.h
> > Fri Feb  1 17:27:10 2002
> > +++ newlib-1.10.0/newlib/libc/include/machine/setjmp.h  Wed Nov 27
> > 07:55:10 2002
> > @@ -41,8 +41,8 @@
> >  #if defined(__CYGWIN__) && !defined (_JBLEN)
> >  #define _JBLEN (13 * 4)
> >  #elif defined (__i386__)
> > -#ifdef __unix__
> > -# define _JBLEN        36
> > +#if defined(__unix__) || defined(__rtems__)
> > +# define _JBLEN        (9 * 4)
> >  #else
> >  #include "setjmp-dj.h"
> >  #endif
> >

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel@OARcorp.com                 On-Line Applications Research
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