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, 100 insertions, 0 deletions

diff --git a/sysdeps/unix/mips/sysdep.S b/sysdeps/unix/mips/sysdep.S
new file mode 100644
index 0000000000..4a01c5f63f
--- /dev/null
+++ b/sysdeps/unix/mips/sysdep.S
@@ -0,0 +1,100 @@
+/* Copyright (C) 1992-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Brendan Kehoe (brendan@zen.org).
+
+   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>
+#define _ERRNO_H
+#include <bits/errno.h>
+#include <sys/asm.h>
+
+	.set	nomips16
+
+#ifdef _LIBC_REENTRANT
+
+LOCALSZ= 3
+FRAMESZ= (((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK
+RAOFF= FRAMESZ-(1*SZREG)
+GPOFF= FRAMESZ-(2*SZREG)
+V0OFF= FRAMESZ-(3*SZREG)
+
+ENTRY(__syscall_error)
+#ifdef __PIC__
+	.set noat
+	SETUP_GPX (AT)
+	.set at
+#endif
+	PTR_SUBU sp, FRAMESZ
+	.set noat
+	SETUP_GPX64(GPOFF,AT)
+	.set at
+#ifdef __PIC__
+	SAVE_GP(GPOFF)
+#endif
+	REG_S	v0, V0OFF(sp)
+	REG_S	ra, RAOFF(sp)
+
+#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
+	/* We translate the system's EWOULDBLOCK error into EAGAIN.
+	   The GNU C library always defines EWOULDBLOCK==EAGAIN.
+	   EWOULDBLOCK_sys is the original number.  */
+	bne	v0, EWOULDBLOCK_sys, L(skip)
+	nop
+	li	v0, EAGAIN
+L(skip):
+#endif
+	/* Find our per-thread errno address  */
+	jal	__errno_location
+
+	/* Store the error value.  */
+	REG_L	t0, V0OFF(sp)
+	sw	t0, 0(v0)
+
+	/* And just kick back a -1.  */
+	REG_L	ra, RAOFF(sp)
+	RESTORE_GP64
+	PTR_ADDU sp, FRAMESZ
+	li	v0, -1
+	j	ra
+	END(__syscall_error)
+
+#else /* _LIBC_REENTRANT */
+
+
+ENTRY(__syscall_error)
+#ifdef __PIC__
+	SETUP_GPX (AT)
+#endif
+	SETUP_GPX64 (t9, AT)
+
+#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
+	/* We translate the system's EWOULDBLOCK error into EAGAIN.
+	   The GNU C library always defines EWOULDBLOCK==EAGAIN.
+	   EWOULDBLOCK_sys is the original number.  */
+	bne v0, EWOULDBLOCK_sys, L(skip)
+	li v0, EAGAIN
+L(skip):
+#endif
+	/* Store it in errno... */
+	sw v0, errno
+
+	/* And just kick back a -1.  */
+	li v0, -1
+
+	RESTORE_GP64
+	j ra
+	END(__syscall_error)
+#endif  /* _LIBC_REENTRANT  */