Re: NetBSD/i386 7.0 hangs booting 486

[christos%zoulas.com@localhost (Christos Zoulas)]

On Nov 24,  1:02pm, thor0505%comcast.net@localhost ("William D. Jones") wrote:
-- Subject: Re: NetBSD/i386 7.0 hangs booting 486

| Was this a regression from the problems that I had in February? Or did 
| gcc/llvm make changes to their code that assume CPUID exists 
| unconditionally? I seem to recall the problem last time was i386-specific 
| code in the NetBSD source tree proper unconditionally trying to call CPUID. 
| I should've been updating my kernel more frequently :/, but alas my time 
| management isn't great.

Yes, it was the same problem, and your report helped fixing it :-) 
 
| LLVM doesn't support anything lower than the Pentium, so I'm unsure if 
| they'll accept the patch :(.

I know, but they still have code that supports i386 and they follow the
same API's as gcc... So they are 1/2 broken:
http://nxr.netbsd.org/xref/src/external/bsd/llvm/dist/clang/lib/Headers/cpuid.h#184

The check for level is missing here:
http://nxr.netbsd.org/xref/src/external/bsd/llvm/dist/clang/lib/Headers/cpuid.h#177

And the bug report for gcc:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68491

christos