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, 196 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/mips/setcontext.S b/sysdeps/unix/sysv/linux/mips/setcontext.S
new file mode 100644
index 0000000000..beeb2a5f60
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/setcontext.S
@@ -0,0 +1,196 @@
+/* Set 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 setcontext (const ucontext_t *ucp) */
+
+	.text
+	.set	nomips16
+LOCALSZ = 0
+ARGSZ = 0
+MASK = 0x00000000
+#ifdef __PIC__
+LOCALSZ = 1						/* save gp */
+#endif
+#if _MIPS_SIM != _ABIO32
+ARGSZ = 1						/* save a0 */
+# ifdef __PIC__
+MASK = 0x10000000
+# endif
+#endif
+FRAMESZ = (((ARGSZ + LOCALSZ) * SZREG) + ALSZ) & ALMASK
+GPOFF = FRAMESZ - ((ARGSZ + 1) * SZREG)
+#if _MIPS_SIM != _ABIO32
+A0OFF = FRAMESZ - (1 * SZREG)				/* callee-allocated */
+#else
+A0OFF = FRAMESZ + (0 * SZREG)				/* caller-allocated */
+#endif
+
+NESTED (__setcontext, FRAMESZ, ra)
+	.mask	MASK, -(ARGSZ * SZREG)
+	.fmask	0x00000000, 0
+
+#ifdef __PIC__
+	SETUP_GP
+#endif
+
+	PTR_ADDIU sp, -FRAMESZ
+	cfi_adjust_cfa_offset (FRAMESZ)
+
+#ifdef __PIC__
+	SETUP_GP64_STACK (GPOFF, __setcontext)
+	SAVE_GP (GPOFF)
+#endif
+
+#ifdef PROF
+	.set	noat
+	move	AT, ra
+	jal	_mcount
+	.set	at
+#endif
+
+	/* Check for the magic flag.  */
+	li	v0, 1
+	REG_L	v1, (0 * SZREG + MCONTEXT_GREGS)(a0)	/* zero */
+	bne	v0, v1, 98f
+
+	REG_S	a0, A0OFF(sp)
+
+/* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, NULL, _NSIG8) */
+	li	a3, _NSIG8
+	move	a2, zero
+	PTR_ADDU a1, a0, UCONTEXT_SIGMASK
+	li	a0, SIG_SETMASK
+
+	li	v0, SYS_ify (rt_sigprocmask)
+	syscall
+	bnez	a3, 99f
+
+	REG_L	v0, A0OFF(sp)
+
+#ifdef __mips_hard_float
+# if _MIPS_SIM == _ABI64
+	l.d	fs0, (24 * SZREG + MCONTEXT_FPREGS)(v0)
+	l.d	fs1, (25 * SZREG + MCONTEXT_FPREGS)(v0)
+	l.d	fs2, (26 * SZREG + MCONTEXT_FPREGS)(v0)
+	l.d	fs3, (27 * SZREG + MCONTEXT_FPREGS)(v0)
+	l.d	fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
+	l.d	fs5, (29 * SZREG + MCONTEXT_FPREGS)(v0)
+	l.d	fs6, (30 * SZREG + MCONTEXT_FPREGS)(v0)
+	l.d	fs7, (31 * SZREG + MCONTEXT_FPREGS)(v0)
+
+# else  /* _MIPS_SIM != _ABI64 */
+	l.d	fs0, (20 * SZREG + MCONTEXT_FPREGS)(v0)
+	l.d	fs1, (22 * SZREG + MCONTEXT_FPREGS)(v0)
+	l.d	fs2, (24 * SZREG + MCONTEXT_FPREGS)(v0)
+	l.d	fs3, (26 * SZREG + MCONTEXT_FPREGS)(v0)
+	l.d	fs4, (28 * SZREG + MCONTEXT_FPREGS)(v0)
+	l.d	fs5, (30 * SZREG + MCONTEXT_FPREGS)(v0)
+
+# endif /* _MIPS_SIM != _ABI64 */
+
+	lw	v1, MCONTEXT_FPC_CSR(v0)
+	ctc1	v1, fcr31
+#endif /* __mips_hard_float */
+
+	/* Note the contents of argument registers will be random
+	   unless makecontext() has been called.  */
+	REG_L	a0, (4 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	a1, (5 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	a2, (6 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	a3, (7 * SZREG + MCONTEXT_GREGS)(v0)
+#if _MIPS_SIM != _ABIO32
+	REG_L	a4, (8 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	a5, (9 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	a6, (10 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	a7, (11 * SZREG + MCONTEXT_GREGS)(v0)
+#endif
+
+	REG_L	s0, (16 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	s1, (17 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	s2, (18 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	s3, (19 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	s4, (20 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	s5, (21 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	s6, (22 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	s7, (23 * SZREG + MCONTEXT_GREGS)(v0)
+#if ! defined (__PIC__) || _MIPS_SIM != _ABIO32
+	REG_L	gp, (28 * SZREG + MCONTEXT_GREGS)(v0)
+#endif
+	REG_L	sp, (29 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	fp, (30 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	ra, (31 * SZREG + MCONTEXT_GREGS)(v0)
+	REG_L	t9, MCONTEXT_PC(v0)
+
+	move	v0, zero
+	jr	t9
+
+98:
+	/* This is a context obtained from a signal handler.
+	   Perform a full restore by pushing the context
+	   passed onto a simulated signal frame on the stack
+	   and call the signal return syscall as if a signal
+	   handler exited normally.  */
+	PTR_ADDIU sp, -((RT_SIGFRAME_SIZE + ALSZ) & ALMASK)
+	cfi_adjust_cfa_offset ((RT_SIGFRAME_SIZE + ALSZ) & ALMASK)
+
+	/* Only ucontext is referred to from rt_sigreturn,
+	   copy it.  */
+	PTR_ADDIU t1, sp, RT_SIGFRAME_UCONTEXT
+	li	t3, ((UCONTEXT_SIZE + SZREG - 1) / SZREG) - 1
+0:
+	REG_L	t2, (a0)
+	PTR_ADDIU a0, SZREG
+	REG_S	t2, (t1)
+	PTR_ADDIU t1, SZREG
+	.set	noreorder
+	bgtz	t3, 0b
+	 addiu	t3, -1
+	.set	reorder
+
+/* rt_sigreturn () -- no arguments, sp points to struct rt_sigframe.  */
+	li	v0, SYS_ify (rt_sigreturn)
+	syscall
+
+	/* Restore the stack and fall through to the error
+	   path.  Successful rt_sigreturn never returns to
+	   its calling place.  */
+	PTR_ADDIU sp, ((RT_SIGFRAME_SIZE + ALSZ) & ALMASK)
+	cfi_adjust_cfa_offset (-((RT_SIGFRAME_SIZE + ALSZ) & ALMASK))
+99:
+#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 (__setcontext)
+
+weak_alias (__setcontext, setcontext)