* microblaze/_exception_handler.S: Adjust to be weak.

* microblaze/Makefile.in: Add LINUX_BSP.
	* microblaze/elf-gloss-linux.ld: New file.
	* microblaze/elf-gloss-linux.specs: Likewise.
	* microblaze/linux-crt0.S: Likewise.
	* microblaze/linux-inbyte.c: Likewise.
	* microblaze/linux-outbyte.c: Likewise.
	* microblaze/linux-syscalls-wrap.c: Likewise.
	* microblaze/linux-syscalls.S: Likewise.
	* microblaze/linux-syscalls.h: Likewise.

libgloss/microblaze/linux-syscalls.S

@@ -0,0 +1,45 @@
+/* linux-syscalls - Syscall interface to microblaze linux
+ *
+ * Copyright (c) 2011 Edgar E. Iglesias
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+#include "linux-syscalls.h"
+
+#define FUNC(name) .type name, %function; name:
+
+#define GLOBAL(name) .global name; FUNC(name)
+#define SIZE(name) .size name, .-name
+
+# define SYSCALL_BODY(name)		\
+	addik	r12, r0, SYS_ ## name;	\
+	brki    r14, 8;			\
+	rtsd	r15, 8;			\
+	nop;
+
+# define SYSCALL(name)			\
+        GLOBAL(_ ## name);		\
+	SYSCALL_BODY(name);		\
+        SIZE(_ ## name)
+
+SYSCALL(brk)
+SYSCALL(exit)
+SYSCALL(read)
+SYSCALL(write)
+SYSCALL(open)
+SYSCALL(close)
+SYSCALL(lseek)
+SYSCALL(fstat)
+SYSCALL(unlink)
+SYSCALL(getpid)
+SYSCALL(kill)
+SYSCALL(rt_sigaction)