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To: Poul-Henning Kamp <phk@dk.tfs.com>
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Subject: Re: cvs commit: src/sys/i386/conf Makefile.i386 src/sys/i386/i386 setdef0.c setdef1.c setdefs.h identcpu.c locore.s machdep.c swtch.s src/sys/i386/isa npx.c src/sys/sys cdefs.h kernel.h src/sys/gnu/i386/fpemul div_small.s fpu_asm.h poly_div.s poly_mul64.s polynomial.s reg_div.s reg_norm.s reg_round.s reg_u_add.s reg_u_div.s reg_u_mul.s reg_u_sub.s wm_shrx.s wm_sqrt.s src/sys/i386/include asnames.h asmacros.h 
In-reply-to: Your message of "Tue, 22 Apr 1997 09:18:24 +0200."
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Date: Tue, 22 Apr 1997 06:57:57 -0700
From: John Polstra <jdp@polstra.com>
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> >  The impact on developers is virtually nil, except for two things.
> >  All linker sets that might possibly be present in the kernel must be
> >  listed in "sys/i386/i386/setdefs.h".
> 
> Urg.  This complicates the sysctl a fair bit.  Can't we find some way
> to build this list automagically ?

I will take a look at it and see what I can do.  Remember, it won't
break the a.out kernel even if it is wrong.  It affects only the ELF
kernel.  No emergency measures are necessary.

> If we added a .stab for all linkersets, couldn't we gather it from
> there ?

It would have to be done in some sort of last-minute pre-link step,
after everything else had already been compiled, but I suppose it
is possible.  I don't really like the approach, because .stabs don't
even officially exist in ELF.  GCC emits them, but only for the
brain-damaged reason that they never could get cc1plus to emit usable
DWARF.  The assmbler and linker pass .stabs through, but they don't
understand them in any way.

I'll take a look at the SYSCTL macros.  I may be able to get them to
emit the necessary stuff to do it automatically.
--
   John Polstra                                       jdp@polstra.com
   John D. Polstra & Co., Inc.                Seattle, Washington USA
   "Self-knowledge is always bad news."                 -- John Barth