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, 40 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/mips/kernel_sigaction.h b/sysdeps/unix/sysv/linux/mips/kernel_sigaction.h
new file mode 100644
index 0000000000..b6f52cc9c9
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/kernel_sigaction.h
@@ -0,0 +1,40 @@
+/* This is the sigaction structure from the Linux 2.1.24 kernel.  */
+
+#include <sgidefs.h>
+
+#define HAVE_SA_RESTORER
+
+struct old_kernel_sigaction {
+	unsigned int	sa_flags;
+	__sighandler_t	k_sa_handler;
+	unsigned long	sa_mask;
+	unsigned int    __pad0[3]; /* reserved, keep size constant */
+
+	/* Abi says here follows reserved int[2] */
+	void		(*sa_restorer)(void);
+#if (_MIPS_SZPTR < 64)
+	/*
+	 * For 32 bit code we have to pad struct sigaction to get
+	 * constant size for the ABI
+	 */
+	int		pad1[1]; /* reserved */
+#endif
+};
+
+
+#define _KERNEL_NSIG	       128
+#define _KERNEL_NSIG_BPW       _MIPS_SZLONG
+#define _KERNEL_NSIG_WORDS     (_KERNEL_NSIG / _KERNEL_NSIG_BPW)
+
+typedef struct {
+	unsigned long sig[_KERNEL_NSIG_WORDS];
+} kernel_sigset_t;
+
+/* This is the sigaction structure from the Linux 2.1.68 kernel.  */
+struct kernel_sigaction {
+	unsigned int	sa_flags;
+	__sighandler_t	k_sa_handler;
+	kernel_sigset_t	sa_mask;
+	void		(*sa_restorer)(void);
+	int		s_resv[1]; /* reserved */
+};