Merge the per-arch crt0.c files into common_elf/crt0.c, with MD macros in

the md_init.h files.

Worked out with and ok miod@; ok matthew@

1 files changed, 121 insertions, 0 deletions

diff --git a/lib/csu/crt0.c b/lib/csu/crt0.c
new file mode 100644
index 00000000000..32cbe4c1f87
--- /dev/null
+++ b/lib/csu/crt0.c
@@ -0,0 +1,121 @@
+/*	$OpenBSD: crt0.c,v 1.1 2013/12/03 06:21:40 guenther Exp $	*/
+
+/*
+ * 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 by Christopher G. Demetriou
+ *	for the NetBSD Project.
+ * 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.
+ */
+
+#include <stdlib.h>
+#include <limits.h>
+
+#include "md_init.h"
+
+/* some defaults */
+#ifndef	MD_START_ARGS
+#define	MD_START_ARGS	\
+	int argc, char **argv, char **envp, void (*cleanup)(void)
+#endif
+#ifndef MD_START
+#define	MD_START	___start
+static void		___start(MD_START_ARGS) __used;
+#endif
+#ifndef	MD_EPROL_LABEL
+#define	MD_EPROL_LABEL	__asm("  .text\n_eprol:")
+#endif
+
+
+static char	*_strrchr(char *, char);
+
+char	**environ;
+char	*__progname = "";
+char	__progname_storage[NAME_MAX+1];
+
+#ifdef MCRT0
+extern void	monstartup(u_long, u_long);
+extern void	_mcleanup(void);
+extern unsigned char _etext, _eprol;
+#endif /* MCRT0 */
+
+#ifdef MD_CRT0_START
+MD_CRT0_START;
+#endif
+
+void
+MD_START(MD_START_ARGS)
+{
+	char *namep, *s;
+#ifdef MD_START_SETUP
+	MD_START_SETUP
+#endif
+
+	environ = envp;
+
+	if ((namep = argv[0]) != NULL) {	/* NULL ptr if argc = 0 */
+		if ((__progname = _strrchr(namep, '/')) == NULL)
+			__progname = namep;
+		else
+			__progname++;
+		for (s = __progname_storage; *__progname &&
+		    s < &__progname_storage[sizeof __progname_storage - 1]; )
+			*s++ = *__progname++;
+		*s = '\0';
+		__progname = __progname_storage;
+	}
+
+#ifndef MD_NO_CLEANUP
+	if (cleanup != NULL)
+		atexit(cleanup);
+#endif
+
+#ifdef MCRT0
+	atexit(_mcleanup);
+	monstartup((u_long)&_eprol, (u_long)&_etext);
+#endif
+
+	__init();
+
+	exit(main(argc, argv, envp));
+}
+
+static char *
+_strrchr(char *p, char ch)
+{
+	char *save;
+
+	for (save = NULL;; ++p) {
+		if (*p == ch)
+			save = p;
+		if (*p == '\0')
+			return (save);
+	}
+}
+
+#ifdef MCRT0
+MD_EPROL_LABEL;
+#endif