Revert r330897:

This was intended to be a non-functional change. It wasn't. The commit
message was thus wrong. In addition it broke arm, and merged crypto
related code.

Revert with prejudice.

This revert skips files touched in r316370 since that commit was since
MFCed. This revert also skips files that require $FreeBSD$ property
changes.

Thank you to those who helped me get out of this mess including but not
limited to gonzo, kevans, rgrimes.

Requested by: gjb (re)

Partial merge of the SPDX changes

These changes are incomplete but are making it difficult
to determine what other changes can/should be merged.

No objections from: pfg

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Replace the last non-optional use of sbrk() in the tree with mmap().

All gmon want's is a region of memory without the overhead of malloc().
Just mapping some pages with mmap is an easy way to accomplish this.

Approved by: jhb, cem, emaste
Obtained from: CheriBSD (bf33e1e70b368ababde74aa3ac70d108c8a52c69)
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D5005

Add declaration to eliminate -Wmissing-prototypes warning

Use ANSI C prototypes.

Eliminates gcc 4.9 warnings.

libc: Use O_CLOEXEC when writing gmon files (cc -pg).

Allow users of gprof to get per run output files (using the pid)

PR: bin/99800
Submitted by: Peter Jeremy <peterjeremy@optushome.com.au>
Reviewed by: jilles (code)
Reviewed by: dwhite (doc)
Approved by: cperciva
MFC after: 1 week

Provide 64-bit PowerPC support in libc.

Obtained from: projects/ppc64

Simplify the calculation of s_scale by rewriting the FP expression to
use uintmax_t instead of float and thereby eliminating the need for
a non-FP version.

Tested on: amd64, ia64 & powerpc (book-E)
Suggested by: bde
MFC after: 1 month

On powerpc, calculate s_scale using the non-FP version previously
specific to hp300. Since FreeBSD does not support hp300, hp300 has
been removed from the condition altogether.

The FP version broke profiling on powerpc due to invalid results.
Casting to double instead of float resolved the issue, but with
Book-E not having a FP unit, the non-FP version looked preferrable.
Note that even on AIM hardware the FP version yielded an invalid
value for s_scale, so the problem is most likely with the compiler
or with the expression itself.

Fix many "function declaration isn't a prototype" warnings in libc.

I've only fixed code that seems to be written by `us'. There are still
many warnings like this present in resolv/, rpc/, stdtime/ and yp/.

Per Regents of the University of Calfornia letter, remove advertising
clause.

# If I've done so improperly on a file, please let me know.

The minbrk symbol is hidden the same on powerpc as other FreeBSD platforms.

Enable building with LIBC_SCCS defined.

Bug submitted by: Andrea Campi <andrea+freebsd_current@webcom.it>

Fix format strings to unbreak with -DDEBUG option.

Use C99 compatible ASM statements.

Add __amd64__ to the list of things that use HIDENAME() to hide minbrk

Initiate deorbit burn for the i386-only a.out related support. Moves are
under way to move the remnants of the a.out toolchain to ports. As the
comment in src/Makefile said, this stuff is deprecated and one should not
expect this to remain beyond 4.0-REL. It has already lasted WAY beyond
that.

Notable exceptions:
gcc - I have not touched the a.out generation stuff there.
ldd/ldconfig - still have some code to interface with a.out rtld.
old as/ld/etc - I have not removed these yet, pending their move to ports.
some includes - necessary for ldd/ldconfig for now.

Tested on: i386 (extensively), alpha

Check for defined(__i386__) instead of just defined(i386) since the compiler
will be updated to only define(__i386__) for ANSI cleanliness.

Do not use __progname directly (except in [gs]etprogname(3)).
Also, make an internal _getprogname() that is used only inside
libc. For libc, getprogname(3) is a weak symbol in case a
function of the same name is defined in userland.

Don't leave stack garbage in the reserved fields of the header.

Fixed style bugs in rev.1.5:
- missing whitespace
- strange version of warn() built out of warnx() + strerror(). Just use
warn().
- conversion of just one of the two perror()'s to warn*()

Actually use _warn() instead of _warn(), to keep up with namespace-
unpollution for warn().

* Remove __P and convert to ANSI prototypes.
* Remove 'register'. (some functions had 7+ register functions...)
* Fix SCM ID's.

We use HIDENAME(minbrk) on sparc64 too.

Remove _THREAD_SAFE and make libc thread-safe by default by
adding (weak definitions to) stubs for some of the pthread
functions. If the threads library is linked in, the real
pthread functions will pulled in.

Use the following convention for system calls wrapped by the
threads library:
__sys_foo - actual system call
_foo - weak definition to __sys_foo
foo - weak definition to __sys_foo

Change all libc uses of system calls wrapped by the threads
library from foo to _foo. In order to define the prototypes
for _foo(), we introduce namespace.h and un-namespace.h
(suggested by bde). All files that need to reference these
system calls, should include namespace.h before any standard
includes, then include un-namespace.h after the standard
includes and before any local includes. <db.h> is an exception
and shouldn't be included in between namespace.h and
un-namespace.h namespace.h will define foo to _foo, and
un-namespace.h will undefine foo.

Try to eliminate some of the recursive calls to MT-safe
functions in libc/stdio in preparation for adding a mutex
to FILE. We have recursive mutexes, but would like to avoid
using them if possible.

Remove uneeded includes of <errno.h> from a few files.

Add $FreeBSD$ to a few files in order to pass commitprep.

Approved by: -arch

Simplify sytem call renaming. Instead of _foo() <-- _libc_foo <-- foo(),
just use _foo() <-- foo(). In the case of a libpthread that doesn't do
call conversion (such as linuxthreads and our upcoming libpthread), this
is adequate. In the case of libc_r, we still need three names, which are
now _thread_sys_foo() <-- _foo() <-- foo().

Convert all internal libc usage of: aio_suspend(), close(), fsync(), msync(),
nanosleep(), open(), fcntl(), read(), and write() to _foo() instead of foo().

Remove all internal libc usage of: creat(), pause(), sleep(), system(),
tcdrain(), wait(), and waitpid().

Make thread cancellation fully POSIX-compliant.

Suggested by: deischen

Add three-tier symbol naming in support of POSIX thread cancellation
points. For library functions, the pattern is __sleep() <--
_libc_sleep() <-- sleep(). The arrows represent weak aliases. For
system calls, the pattern is _read() <-- _libc_read() <-- read().

Enable gmon/mcount on alpha.

Change the profile data file name from gmon.out to progname.gmon
where progname comes from __progname in crt0 or crt1.

These files are very specific to FreeBSD kernels, so silently compile
no code when building a library with __NETBSD_SYSCALLS defined.

Add support to enable libc to be compiled in ELF format. (#ifdef __ELF__)
In a nutshell, this macroizes the local/global symbol scoping rules
that are different in a.out and ELF. It also makes the i386 assembler
stubs conform to i386 PIC calling conventions - the a.out ld.so didn't
object, but the ELF one needs it as it implements PIC jumps via PLT's as
well as calls. The a.out rtld only worked because it was accidently
snooping the grandparent calling function's return address off the stack..

This also affects the libc_r code a little, because of cpp macro nesting.

Remove trailing whitespace.

This commit was generated by cvs2svn to compensate for changes in r1573,
which included commits to RCS files with non-trunk default branches.

BSD 4.4 Lite Lib Sources