20000317 sourceware import

libgloss/rs6000/simulator.S

@@ -0,0 +1,79 @@
+/*
+ * simulator.S -- PowerPC simulator system calls.
+ *
+ * Copyright (c) 1995 Cygnus Support
+ *
+ * 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 "ppc-asm.h"
+
+FUNC_START(_exit)
+	li	r0, 1
+	sc
+
+/*
+ * Insure that the debugger tells the client that the PC is in _exit,
+ * not whatever function happens to follow this function.
+ */
+
+0:	trap
+	b	0b			/* we never should return, but... */
+
+FUNC_END(_exit)
+
+FUNC_START(read)
+	li	r0,3
+	sc
+	bns+	0f
+	b	FUNC_NAME(_cerror)
+0:	blr
+FUNC_END(read)
+
+FUNC_START(write)
+	li	r0,4
+	sc
+	bns+	0f
+	b	FUNC_NAME(_cerror)
+0:	blr
+FUNC_END(write)
+
+FUNC_START(open)
+	li	r0,5
+	sc
+	bns+	0f
+	b	FUNC_NAME(_cerror)
+0:	blr
+FUNC_END(open)
+
+FUNC_START(close)
+	li	r0,6
+	sc
+	bns+	0f
+	b	FUNC_NAME(_cerror)
+0:	blr
+FUNC_END(close)
+
+FUNC_START(brk)
+	li	r0,17
+	sc
+	bns+	0f
+	b	FUNC_NAME(_cerror)
+0:	blr
+FUNC_END(brk)
+
+FUNC_START(lseek)
+	li	r0,199
+	sc
+	bns+	0f
+	b	FUNC_NAME(_cerror)
+0:	blr
+FUNC_END(lseek)