Add support for FT32 platform.

libgloss/ft32/sim-exit.S

@@ -0,0 +1,34 @@
+/*
+ * sim-exit.S -- _exit interface for FT32 simulator
+ *
+ * Copyright (C) 2015 FTDI (support@ftdichip.com)
+ *
+ * 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 "syscall.h"
+
+/*
+ * Input:
+ * $r0        -- exit value
+ *
+ * Output:
+ * none
+ */
+
+        .globl        _exit
+        .type        _exit,@function
+        .text
+_exit:
+        # swi        SYS_exit
+        sta.l   0x1fffc,$r0
+.Lend:
+        .size        _exit,.Lend-_exit