crt0. Almost like on alpha, except that sparc64 needs an assembler stub

for the moment. (why make the ABI so complicated?)
The assembler is inspired by crt0 in NetBSD.

1 files changed, 111 insertions, 0 deletions

diff --git a/lib/csu/sparc64/crt0.c b/lib/csu/sparc64/crt0.c
new file mode 100644
index 00000000000..e75f0db8ad6
--- /dev/null
+++ b/lib/csu/sparc64/crt0.c
@@ -0,0 +1,111 @@
+/*	$OpenBSD: crt0.c,v 1.1 2001/08/29 02:25:15 art 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>
+
+static char	*_strrchr __P((char *, char));
+
+char	**environ;
+char	*__progname = "";
+
+#ifdef MCRT0
+extern void	monstartup __P((u_long, u_long));
+extern void	_mcleanup __P((void));
+extern unsigned char _etext, _eprol;
+#endif /* MCRT0 */
+
+__asm__("
+	.text
+	.align 4
+	.global _start			/* NetBSD compat */
+	.global __start
+_start:
+__start:
+	clr	%g4
+	clr	%fp
+	add	%sp, 2047, %o0		/* stack */
+	ba,pt	%icc, ___start
+	 nop
+");
+
+
+void ___start __P((char **, void (*) __P((void)), const void *));
+
+void
+___start(char **sp, void (*cleanup)(void), const void *obj)
+{
+	long argc;
+	char **argv, *namep;
+
+	argc = *(long *)sp;
+	argv = sp + 1;
+	environ = sp + 2 + argc;		/* 2: argc + NULL ending argv */
+
+	if ((namep = argv[0]) != NULL) {	/* NULL ptr if argc = 0 */
+		if ((__progname = _strrchr(namep, '/')) == NULL)
+			__progname = namep;
+		else
+			__progname++;
+	}
+
+#ifdef MCRT0
+	atexit(_mcleanup);
+	monstartup((u_long)&_eprol, (u_long)&_etext);
+#endif
+
+	__init();
+
+	exit(main(argc, argv, environ));
+}
+
+
+static char *
+_strrchr(p, ch)
+register char *p, ch;
+{
+	register char *save;
+
+	for (save = NULL;; ++p) {
+		if (*p == ch)
+			save = (char *)p;
+		if (!*p)
+			return(save);
+	}
+/* NOTREACHED */
+}
+
+#ifdef MCRT0
+asm ("  .text");
+asm ("_eprol:");
+#endif
+