PR/50228: Christian Groessler: fix bzero(ptr, 0) on ppc. Check for 0 length
before jumping to cb_memset like memset does.

Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

Use a constructor to get the cache_info.
However memset can be called before the constructor is called, just treat
those as simple fills.
Add CACHE_INFO_DCACHE_LINE_SIZE to assym.h and use it

Use pcrel access and avoid GOT entries. Restructure a little to be more
efficient.

Don't use r0 to restore LR, use r7 instead.

Fix some bugs introduced when switching to new GOT/PLT format.

Switch to the PIC_GOTSETUP/PIC_TOCSETUP macros for PIC code. Now libc
will be built to use secureplt by default.

Use END(foo) everywhere.
Make __cerror hidden.
Use non-PLT calls to __cerror.
Use assym.h when appropriate.
Use addi to adjust stack instead of loading it.
Add __RCSIDs
Force -D_NOREGNAMES for all .S

Use END(foo) everywhere.
Make __cerror hidden.
Use non-PLT calls to __cerror.
Use assym.h when appropriate.
Use addi to adjust stack instead of loading it.
Add __RCSIDs
Force -D_NOREGNAMES for all .S files.
[this is all in preperation for secure plt support]

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netbsd.org->NetBSD.org

Make it work on cpus with cachelinesize < 32.

Tested on macppc by Markus W Kilbinger.

Convert to use register prefixes. (0 -> %r0, etc.)

Use new CPU_CACHEINFO sysctl to get more detailed information about
cache layout.

Outifdef some stuff not needed in the _KERNEL case.

Make this work in kernel space too.

Add PPC assembler routines for ffs(3), bzero(3) and memset(3).