Check-in of powerpc csu support.

NOTE: This will not work until the other pieces are checked in.
This is primarily the NetBSD powerpc port, with modifications
to support ELF.

A change needs to be made to one of the bsd.*.mk files to support
DESTDIR compilation with the crtbegin and crtend files.

4 files changed, 226 insertions, 0 deletions

diff --git a/lib/csu/powerpc/Makefile b/lib/csu/powerpc/Makefile
new file mode 100644
index 00000000000..fd37c1d03d8
--- /dev/null
+++ b/lib/csu/powerpc/Makefile
@@ -0,0 +1,38 @@
+#	from: @(#)Makefile	8.1 (Berkeley) 6/1/93
+#	$Id: Makefile,v 1.1 1996/12/21 20:53:48 rahnds Exp $
+
+CFLAGS=		-DLIBC_SCCS
+OBJS=		crt0.o gcrt0.o crtbegin.o crtend.o
+CLEANFILES+=	core a.out
+
+all: ${OBJS}
+
+crt0.o: crt0.s
+	${CPP} -DCRT0 ${.ALLSRC} | ${AS} -o $@
+	@${LD} -x -r ${.TARGET}
+	@mv a.out ${.TARGET}
+
+gcrt0.o: crt0.s
+	${CPP} -DMCRT0 ${.ALLSRC} | ${AS} -o $@
+	@${LD} -x -r ${.TARGET}
+	@mv a.out ${.TARGET}
+
+crtbegin.o: crtbegin.c
+	@echo ${CC} ${CFLAGS} -c ${.ALLSRC} -o ${.TARGET}
+	@${CC} ${CFLAGS} -c ${.ALLSRC} -o ${.TARGET}.o
+	@${LD} -x -r -o ${.TARGET} ${.TARGET}.o
+	@rm -f ${.TARGET}.o
+ 
+crtend.o: crtend.s
+	@echo ${CC} ${CFLAGS} -c ${.ALLSRC} -o ${.TARGET}
+	@${CC} ${CFLAGS} -c ${.ALLSRC} -o ${.TARGET}.o
+	@${LD} -x -r -o ${.TARGET} ${.TARGET}.o
+	@rm -f ${.TARGET}.o
+
+install:
+	install ${COPY} -o ${BINOWN} -g ${BINGRP} -m 444 ${OBJS} \
+		${DESTDIR}/usr/lib
+
+depend lint tags:
+
+.include <bsd.prog.mk>
diff --git a/lib/csu/powerpc/crt0.s b/lib/csu/powerpc/crt0.s
new file mode 100644
index 00000000000..964a05f3861
--- /dev/null
+++ b/lib/csu/powerpc/crt0.s
@@ -0,0 +1,64 @@
+
+	
+	.data 1
+	.comm	environ, 4
+	.globl	__progname
+__progname:
+	.long L1
+L1:	.long 0		# null string plus padding
+
+	
+
+	.text
+	.globl start
+start:	
+	.globl _start
+_start:	
+	
+	# squirrel away the arguments for main
+	mr 13, 3
+	mr 14, 4
+	mr 15, 5
+	mr 16, 6
+
+	# determine the program name (__progname)
+	lwz 28, 0(4)		# r28 = argv[0] (program name)
+	cmpwi 28, 0		# argv[0] == NULL?
+	beq call_main		# yep forget setup of progname
+	mr 3, 28		# r3 = argv[0]
+	li 4, '/'		# r4 = '/'
+	.extern strrchr
+	bl strrchr		# strrchr(argv[0], '/')
+	cmpwi 3, 0		#    == 0?
+	beq no_slash_found	# not found, use argv[0] still in r28
+	addi 28, 3, 1		# was found, point at char after '/'
+no_slash_found:
+	# store the address of the basename found in argv[0]
+	lis 31, __progname@HA
+	stw 28, __progname@L(31)
+
+	lis	26, environ@HA
+	stw	5, environ@L(26)
+
+call_main:	
+	.globl __init
+	bl __init
+	# recover those saved registers
+	mr 3, 13
+	mr 4, 14
+	mr 5, 15
+	mr 6, 16
+	
+	bl main
+	.extern exit
+	mr 13, 3
+	bl __fini
+	mr 3, 13
+	bl exit
+
+	.globl __main
+__main:
+	.globl __eabi
+__eabi:
+	blr
+
diff --git a/lib/csu/powerpc/crtbegin.c b/lib/csu/powerpc/crtbegin.c
new file mode 100644
index 00000000000..efe485a5946
--- /dev/null
+++ b/lib/csu/powerpc/crtbegin.c
@@ -0,0 +1,116 @@
+/*	$OpenBSD: crtbegin.c,v 1.1 1996/12/21 20:53:48 rahnds Exp $	*/
+/*	$NetBSD: crtbegin.c,v 1.1 1996/09/12 16:59:03 cgd 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.
+ */
+
+#ifndef ECOFF_COMPAT
+
+/*
+ * XXX EVENTUALLY SHOULD BE MERGED BACK WITH c++rt0.c
+ */
+
+/*
+ * Run-time module for GNU C++ compiled shared libraries.
+ *
+ * The linker constructs the following arrays of pointers to global
+ * constructors and destructors. The first element contains the
+ * number of pointers in each.
+ * The tables are also null-terminated.
+
+ */
+#include <stdlib.h>
+
+/* XXX hack */
+__asm__("
+.section	.ctors,\"aw\"
+	.long	 -1
+.section	.dtors,\"aw\"
+	.long	 -1
+");
+
+void (*__CTOR_LIST__[0]) __P((void));
+void (*__DTOR_LIST__[0]) __P((void));
+
+static void	__dtors __P((void));
+static void	__ctors __P((void));
+
+static void
+__dtors()
+{
+	unsigned long i = (unsigned long) __DTOR_LIST__[0];
+	void (**p)(void);
+
+	if (i == -1)  {
+		for (i = 1; __DTOR_LIST__[i] != NULL; i++)
+			;
+		i--;
+	}
+	p = __DTOR_LIST__ + i;
+	while (i--)
+		(**p--)();
+}
+
+static void
+__ctors()
+{
+	void (**p)(void) = __CTOR_LIST__ + 1;
+
+	while (*p)
+		(**p++)();
+}
+
+void
+__init()
+{
+	static int initialized = 0;
+
+	/*
+	 * Call global constructors.
+	 * Arrange to call global destructors at exit.
+	 */
+	if (!initialized) {
+		initialized = 1;
+		__ctors();
+	}
+	atexit(__dtors);
+
+}
+
+void
+__fini()
+{
+	/*
+	 * Call global destructors.
+	 */
+	__dtors();
+}
+
+#endif /* !ECOFF_COMPAT */
diff --git a/lib/csu/powerpc/crtend.s b/lib/csu/powerpc/crtend.s
new file mode 100644
index 00000000000..e7d0ca90a9b
--- /dev/null
+++ b/lib/csu/powerpc/crtend.s
@@ -0,0 +1,8 @@
+/*
+ * Emperically created.
+ * this is the NULL terminator for the ctors and dtors lists.
+ */
+.section	.ctors,"aw"
+	.long	 0
+.section	.dtors,"aw"
+	.long	 0