PowerPC version of the C runtime support.

This is an amalgamation of the NetBSD macppc crt0.c (which the copyright
reflects) and the FreeBSD/Alpha crt1.c.

lib/csu/powerpc/crt1.c

@@ -0,0 +1,124 @@
+/*-
+ * Copyright 2001 David E. O'Brien.
+ * All rights reserved.
+ * Copyright 1996-1998 John D. Polstra.
+ * All rights reserved.
+ * Copyright (c) 1997 Jason R. Thorpe.
+ * Copyright (c) 1995 Christopher G. Demetriou
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *          This product includes software developed for the
+ *          FreeBSD Project.  See http://www.freebsd.org/ for
+ *          information about FreeBSD.
+ *          This product includes software developed for the
+ *          NetBSD Project.  See http://www.netbsd.org/ for
+ *          information about NetBSD.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef __GNUC__
+#error "GCC is needed to compile this file"
+#endif
+
+#include <stdlib.h>
+#include "crtbrand.c"
+
+#pragma weak _DYNAMIC
+extern int _DYNAMIC;
+
+extern void _init(void);
+extern void _fini(void);
+extern int main(int, char **, char **);
+
+#ifdef GCRT
+extern void _mcleanup(void);
+extern void monstartup(void *, void *);
+extern int eprol;
+extern int etext;
+#endif
+
+/*
+ * First 5 arguments are specified by the PowerPC SVR4 ABI.
+ * The last argument, ps_strings, is a BSD extension.
+ */
+void _start __P((int, char **, char **, const Obj_Entry *,
+		void (*) __P((void)), struct ps_strings *));
+
+char **environ;
+char *__progname = "";
+
+/* The entry function. */
+void
+_start(argc, argv, envp, obj, cleanup, ps_strings)
+	int argc;
+	char **argv, **envp;
+	const Obj_Entry *obj;			/* from shared loader */
+	void (*cleanup) __P((void));		/* from shared loader */
+	struct ps_strings *ps_strings;		/* BSD extension */
+{
+	char *namep;
+
+	environ = envp;
+
+	if(argc > 0 && argv[0] != NULL) {
+		char *s;
+		__progname = argv[0];
+		for (s = __progname; *s != '\0'; s++)
+			if (*s == '/')
+				__progname = s + 1;
+	}
+
+	if (ps_strings != (struct ps_strings *)0)
+		__ps_strings = ps_strings;
+
+	if (&_DYNAMIC != NULL)
+		atexit(cleanup);
+
+#ifdef GCRT
+	atexit(_mcleanup);
+#endif
+	atexit(_fini);
+#ifdef GCRT
+	monstartup(&eprol, &etext);
+#endif
+	_init();
+	exit( main(argc, argv, env) );
+}
+
+#ifdef GCRT
+__asm__(".text");
+__asm__("eprol:");
+__asm__(".previous");
+#endif
+
+/*
+ * NOTE: Leave the RCS ID _after_ __start(), in case it gets placed in .text.
+ */
+#ifndef lint
+static const char rcsid[] =
+  "$FreeBSD$";
+#endif