Move mips from ports to libc.

I've moved the MIPS port from ports to the main sysdeps hierarchy.
Beyond the README update, the move of the files was simply

git mv ports/sysdeps/mips sysdeps/mips
git mv ports/sysdeps/unix/mips sysdeps/unix/mips
git mv ports/sysdeps/unix/sysv/linux/mips sysdeps/unix/sysv/linux/mips

and in addition to the ChangeLog entries here, I put a note at the top
of ports/ChangeLog.mips similar to those in other files.

Tested that disassembly of installed shared libraries for mips is the
same before and after this patch (except for ld.so where paths in
assertions are involved, as for arm).

	* sysdeps/mips: Move directory from ports/sysdeps/mips.
	* sysdeps/unix/mips: Move directory from ports/sysdeps/unix/mips.
	* sysdeps/unix/sysv/linux/mips: Move directory from
	ports/sysdeps/unix/sysv/linux/mips.
	* README: Update listing for mips-*-linux-gnu and
	mips64-*-linux-gnu.

	* sysdeps/mips: Move directory to ../sysdeps/mips.
	* sysdeps/unix/mips: Move directory to ../sysdeps/unix/mips.
	* sysdeps/unix/sysv/linux/mips: Move directory to
	../sysdeps/unix/sysv/linux/mips.

1 files changed, 154 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/mips/getcontext.S b/sysdeps/unix/sysv/linux/mips/getcontext.S
new file mode 100644
index 0000000000..1e0a2776cc
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/getcontext.S
@@ -0,0 +1,154 @@
+/* Save current context.
+   Copyright (C) 2009-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Maciej W. Rozycki <macro@codesourcery.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+#include <sys/asm.h>
+#include <sys/fpregdef.h>
+#include <sys/regdef.h>
+
+#include "ucontext_i.h"
+
+/* int getcontext (ucontext_t *ucp) */
+
+	.text
+	.set	nomips16
+LOCALSZ = 0
+MASK = 0x00000000
+#ifdef __PIC__
+LOCALSZ = 1						/* save gp */
+# if _MIPS_SIM != _ABIO32
+MASK = 0x10000000
+# endif
+#endif
+FRAMESZ = ((LOCALSZ * SZREG) + ALSZ) & ALMASK
+GPOFF = FRAMESZ - (1 * SZREG)
+
+NESTED (__getcontext, FRAMESZ, ra)
+	.mask	MASK, 0
+	.fmask	0x00000000, 0
+
+#ifdef __PIC__
+	SETUP_GP
+
+	move	a2, sp
+# define _SP a2
+
+# if _MIPS_SIM != _ABIO32
+	move	a3, gp
+#  define _GP a3
+# endif
+
+	PTR_ADDIU sp, -FRAMESZ
+	cfi_adjust_cfa_offset (FRAMESZ)
+	SETUP_GP64_STACK (GPOFF, __getcontext)
+	SAVE_GP (GPOFF)
+
+#else  /* ! __PIC__ */
+# define _SP sp
+# define _GP gp
+
+#endif /* ! __PIC__ */
+
+#ifdef PROF
+	.set	noat
+	move	AT, ra
+	jal	_mcount
+	.set	at
+#endif
+
+	/* Store a magic flag.	*/
+	li	v1, 1
+	REG_S	v1, (0 * SZREG + MCONTEXT_GREGS)(a0)	/* zero */
+
+	REG_S	s0, (16 * SZREG + MCONTEXT_GREGS)(a0)
+	REG_S	s1, (17 * SZREG + MCONTEXT_GREGS)(a0)
+	REG_S	s2, (18 * SZREG + MCONTEXT_GREGS)(a0)
+	REG_S	s3, (19 * SZREG + MCONTEXT_GREGS)(a0)
+	REG_S	s4, (20 * SZREG + MCONTEXT_GREGS)(a0)
+	REG_S	s5, (21 * SZREG + MCONTEXT_GREGS)(a0)
+	REG_S	s6, (22 * SZREG + MCONTEXT_GREGS)(a0)
+	REG_S	s7, (23 * SZREG + MCONTEXT_GREGS)(a0)
+#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
+	REG_S	_GP, (28 * SZREG + MCONTEXT_GREGS)(a0)
+#endif
+	REG_S	_SP, (29 * SZREG + MCONTEXT_GREGS)(a0)
+	REG_S	fp, (30 * SZREG + MCONTEXT_GREGS)(a0)
+	REG_S	ra, (31 * SZREG + MCONTEXT_GREGS)(a0)
+	REG_S	ra, MCONTEXT_PC(a0)
+
+#ifdef __mips_hard_float
+# if _MIPS_SIM == _ABI64
+	s.d	fs0, (24 * SZREG + MCONTEXT_FPREGS)(a0)
+	s.d	fs1, (25 * SZREG + MCONTEXT_FPREGS)(a0)
+	s.d	fs2, (26 * SZREG + MCONTEXT_FPREGS)(a0)
+	s.d	fs3, (27 * SZREG + MCONTEXT_FPREGS)(a0)
+	s.d	fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
+	s.d	fs5, (29 * SZREG + MCONTEXT_FPREGS)(a0)
+	s.d	fs6, (30 * SZREG + MCONTEXT_FPREGS)(a0)
+	s.d	fs7, (31 * SZREG + MCONTEXT_FPREGS)(a0)
+
+# else  /* _MIPS_SIM != _ABI64 */
+	s.d	fs0, (20 * SZREG + MCONTEXT_FPREGS)(a0)
+	s.d	fs1, (22 * SZREG + MCONTEXT_FPREGS)(a0)
+	s.d	fs2, (24 * SZREG + MCONTEXT_FPREGS)(a0)
+	s.d	fs3, (26 * SZREG + MCONTEXT_FPREGS)(a0)
+	s.d	fs4, (28 * SZREG + MCONTEXT_FPREGS)(a0)
+	s.d	fs5, (30 * SZREG + MCONTEXT_FPREGS)(a0)
+
+# endif /* _MIPS_SIM != _ABI64 */
+
+	cfc1	v1, fcr31
+	sw	v1, MCONTEXT_FPC_CSR(a0)
+#endif /* __mips_hard_float */
+
+/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
+	li	a3, _NSIG8
+	PTR_ADDU a2, a0, UCONTEXT_SIGMASK
+	move	a1, zero
+	li	a0, SIG_BLOCK
+
+	li	v0, SYS_ify (rt_sigprocmask)
+	syscall
+	bnez	a3, 99f
+	cfi_remember_state
+
+#ifdef __PIC__
+	RESTORE_GP64_STACK
+	PTR_ADDIU sp, FRAMESZ
+	cfi_adjust_cfa_offset (-FRAMESZ)
+#endif
+	move	v0, zero
+	jr	ra
+
+99:
+	cfi_restore_state
+#ifdef __PIC__
+	PTR_LA	t9, JUMPTARGET (__syscall_error)
+	RESTORE_GP64_STACK
+	PTR_ADDIU sp, FRAMESZ
+	cfi_adjust_cfa_offset (-FRAMESZ)
+	jr	t9
+
+#else  /* ! __PIC__ */
+
+	j	JUMPTARGET (__syscall_error)
+#endif /* ! __PIC__ */
+PSEUDO_END (__getcontext)
+
+weak_alias (__getcontext, getcontext)