Put missing END() markers to set ELF symbol size.

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

Make __cerror protected to restore ABI leak in older libc versions,
where e.g. librt referenced the copy from libc. This still allows libc
to use PC-relative jumps.

Mark __cerror as hidden and exploit that to simplify assembler.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Clean up.

A better fix for the stub-in-other-module problem:
Load the address of cerror through the GOT, so we can do a PIC_EPILOGUE and
leave the stack clean.

Make cerror() work correctly for stubs in other shlibs -- e.g. libposix.

Make cerror an entry and compensate for the PIC_PROLOGUE change in SYS.h

* On architectures using ELF, and conditionally on those in transition, rename
_ASM_LABEL(cerror) and _ASM_LABEL(curbrk) to _C_LABEL(__cerror) and
_C_LABEL(__curbrk) (or their respective architecture

* On architectures using ELF, and conditionally on those in transition, rename
_ASM_LABEL(cerror) and _ASM_LABEL(curbrk) to _C_LABEL(__cerror) and
_C_LABEL(__curbrk) (or their respective architecture-specific equivalents) to
avoid possible name clashes with identifiers used in user applications.
* Do the same for minbrk on all architectures to avoid a GCC-specific (and
on ELF architectures effectively useless) symbol reference renaming in MI code.

show more ...

(Fortunately harmless) typo in previous.

Add *__errno() redirection for _REENTRANT code.

Use _C_LABEL() to generate C labels.

RCSID fixes: Always use the NetBSD rcsid and the macro RCSID() defined in
<machine/asm.h>; Also syscalls should be protected using the SYSLIBC_SCCS
define not LIBC_SCCS

have cerror DTRT on returns, w.r.t. quads and -1. it needs to be done
here (think of syscall(SYS_lseek,...)). also, kill bogus lseek thang.

Random cleanup.

Move the old berkeley sccs id into the header comment like it is done
for other source files.

make an arch directory in libc, and move all machine dirs into it