initial import of NetBSD tree

1 files changed, 186 insertions, 0 deletions

diff --git a/lib/csu/sparc/crt0.c b/lib/csu/sparc/crt0.c
new file mode 100644
index 00000000000..45dce4e521a
--- /dev/null
+++ b/lib/csu/sparc/crt0.c
@@ -0,0 +1,186 @@
+/*	$NetBSD: crt0.c,v 1.15 1995/06/15 21:41:55 pk Exp $	*/
+/*
+ * Copyright (c) 1993 Paul Kranenburg
+ * 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 Paul Kranenburg.
+ * 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.
+ *
+ */
+
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "%W% (Erasmus) %G%";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <stdlib.h>
+
+#include "common.h"
+
+extern	unsigned char	etext;
+extern	unsigned char	eprol asm ("eprol");
+extern void		start __P((void)) asm("start");
+
+#if defined(sun) && defined(sparc)
+static void		__call __P((void));
+#endif
+
+#ifdef BSD
+#undef mmap
+#define mmap(addr, len, prot, flags, fd, off)	\
+    __syscall2((quad_t)SYS_mmap, (addr), (len), (prot), (flags), \
+	(fd), 0, (off_t)(off))
+extern int		__syscall2 __P((quad_t, ...));
+#endif
+
+asm ("	.global start");
+asm ("	.text");
+asm ("	start:");
+
+/* Set up `argc', `argv', and `envp' into local registers (from GNU Emacs). */
+asm ("	mov	0, %fp");
+asm ("	ld	[%sp + 64], %l0");	/* argc */
+asm ("	add	%sp, 68, %l1");		/* argv */
+asm ("	sll	%l0, 2,	%l2");		/**/
+asm ("	add	%l2, 4,	%l2");		/* envp = argv + (argc << 2) + 4 */
+asm ("	add	%l1, %l2, %l2");	/**/
+asm ("	sethi	%hi(_environ), %l3");
+asm ("	st	%l2, [%l3+%lo(_environ)]");	/* *environ = l2 */
+
+/* Finish diddling with stack. */
+asm ("	andn	%sp, 7,	%sp");
+asm ("	sub	%sp, 24, %sp");
+
+/*
+ * Set __progname:
+ *	if (argv[0])
+ *		if ((__progname = _strrchr(argv[0], '/')) == NULL)
+ *			__progname = argv[0];
+ *		else
+ *			++__progname;
+ */
+asm ("	ld	[%l1], %o0");
+asm ("	cmp	%o0, 0");
+asm ("	mov	%o0, %l6");
+asm ("	be	1f");
+asm ("	sethi	%hi(___progname), %l7");
+#ifdef DYNAMIC
+asm ("	call	__strrchr");
+#else
+asm ("	call	_strrchr");
+#endif
+asm ("	mov	47, %o1");
+asm ("	cmp	%o0, 0");
+asm ("	be,a	1f");
+asm ("	st	%l6, [%l7+%lo(___progname)]");
+asm ("	add	%o0, 1, %o0");
+asm ("	st	%o0, [%l7+%lo(___progname)]");
+asm ("1:");
+
+#ifdef DYNAMIC
+/* Resolve symbols in dynamic libraries */
+asm ("	sethi	%hi(__DYNAMIC), %o0");
+asm ("	orcc	%o0, %lo(__DYNAMIC), %o0");
+asm ("	be	1f");
+asm ("	nop");
+asm ("	call	___load_rtld");
+asm ("	nop");
+asm ("1:");
+#endif
+
+/* From here, all symbols should have been resolved, so we can use libc */
+#ifdef MCRT0
+/*
+ * atexit(_mcleanup);
+ * monstartup((u_long)&eprol, (u_long)&etext);
+ */
+asm ("	sethi	%hi(__mcleanup), %o0");
+asm ("	call	_atexit");
+asm ("	or	%o0, %lo(__mcleanup), %o0");
+asm ("	sethi	%hi(_eprol), %o0");
+asm ("	or	%o0, %lo(_eprol), %o0");
+asm ("	sethi	%hi(_etext), %o1");
+asm ("	call	_monstartup");
+asm ("	or	%o1, %lo(_etext), %o1");
+#endif
+
+#ifdef sun
+/* SunOS compatibility */
+asm ("	call	start_float");
+asm ("	nop");
+#endif
+
+/* Move `argc', `argv', and `envp' from locals to parameters for `main'.  */
+asm ("	mov	%l0,%o0");
+asm ("	mov	%l1,%o1");
+asm ("__callmain:");		/* Defined for the benefit of debuggers */
+asm ("	call	_main");
+asm ("	mov	%l2,%o2");
+
+asm ("	call	_exit");
+asm ("	nop");
+
+#ifdef DYNAMIC
+/* System call entry */
+asm("	.set	SYSCALL_G2RFLAG, 0x400");
+asm("	.set	SYS___syscall, 198");
+asm("___syscall2:");
+asm("	sethi	%hi(SYS___syscall), %g1");	/* `SYS___syscall' */
+asm("	ba	1f");
+asm("	or	%g1, %lo(SYS___syscall), %g1");
+asm("___syscall:");
+asm("	clr	%g1");				/* `SYS_syscall' */
+asm("1:");
+asm("	or	%g1, SYSCALL_G2RFLAG, %g1");	/* Use quick return */
+asm("	add	%o7, 8, %g2");
+asm("	ta	%g0");
+asm("	mov	-0x1, %o0");			/* Note: no `errno' */
+asm("	jmp	%o7 + 0x8");
+asm("	mov	-0x1, %o1");
+#endif
+
+#ifdef sun
+static
+__call()
+{
+	/*
+	 * adjust the C generated pointer to the crt struct to the
+	 * likings of ld.so, which is an offset relative to its %fp
+	 */
+	asm("mov	%i0, %o0");
+	asm("mov	%i1, %o1");
+	asm("call	%i2");
+	asm("sub	%o1, %sp, %o1");
+	/*NOTREACHED, control is transferred directly to our caller */
+}
+#endif
+
+#include "common.c"
+
+#ifdef MCRT0
+asm ("	.text");
+asm ("_eprol:");
+#endif