src/lib/libc/arm, branch release/9.3.0

MFC r251047:

2013-06-04T05:07:03Z

Avoid a nested frame for getcontext() call in check_deferred_signal().

MFC r246117:

2013-02-13T23:25:11Z

Rework the __vdso_* symbols attributes to only make the symbols weak, but use normal references instead of weak. This makes the statically linked binaries to use fast gettimeofday(2) by forcing the linker to resolve references and providing the neccessary functions.

MFC: r231616, r232497, r234337

2012-06-23T18:39:35Z

Add __aeabi_read_tp function required for thread-local storage.

MFC: r233106, r233107

2012-06-21T13:51:50Z

Fix TLS for statically linked binaries.

MFC r230188i (by das):

2012-06-13T20:31:30Z

Correct some bugs that resulted from arm/_fpmath.h being blindly copied from the x86 version, which has a completely different long double format.

MFC r230429:

2012-02-21T21:18:59Z

Add API for obtaining extended machine context states that cannot be fit into existing mcontext_t. On i386 and amd64 do return the extended FPU states using getcontextx(3). For other architectures, getcontextx(3) returns the same information as getcontext(2). MFC r230864: Make the sys/ucontext.h self-contained by changing the return type of __getcontextx_size(3) from size_t to int.

Fix typos - remove duplicate "the".

2011-02-21T09:01:34Z

PR: bin/154928 Submitted by: Eitan Adler MFC after: 3 days

The NetBSD Foundation has granted permission to remove clause 3 and 4 from

2010-03-02T22:16:40Z

their software. Obtained from: NetBSD

Remove unneeded stdlib directories.

2009-06-23T14:11:41Z

It's not necessary to add stdlib directories for each architecture, even if the architecture doesn't implement any files of its own. Submitted by: Christoph Mallon

- Eliminate extra subcs instruction. I have not noticed before that we

2009-06-21T13:15:56Z

always perform substraction now, so no instruction could be rordered to eliminate the conditional substraction.