startup files for arm. Partially borrowed from NetBSD.

3 files changed, 264 insertions, 0 deletions

diff --git a/lib/csu/arm/Makefile b/lib/csu/arm/Makefile
new file mode 100644
index 00000000000..47adc13a1d1
--- /dev/null
+++ b/lib/csu/arm/Makefile
@@ -0,0 +1,62 @@
+#	$OpenBSDe Makefile,v 1.6 2000/06/28 04:56:44 rahnds Exp $
+#	from: @(#)Makefile	8.1 (Berkeley) 6/1/93
+
+CFLAGS+=	-DLIBC_SCCS
+OBJS=		crt0.o gcrt0.o crtbegin.o crtend.o crtbeginS.o crtendS.o
+SRCS=		crt0.c crtbegin.c crtbeginS.c crtend.c crtendS.c
+
+ELFDIR=		${.CURDIR}/../common_elf
+.PATH:		${ELFDIR}
+CFLAGS+=	-I${ELFDIR} -I${.CURDIR}
+
+PICFLAG?=-fpic
+
+all: ${OBJS}
+
+crt0.o: crt0.c
+	@echo ${COMPILE.c} -DCRT0 ${.CURDIR}/crt0.c -o ${.TARGET}
+	@${COMPILE.c} -DCRT0 ${.CURDIR}/crt0.c -o ${.TARGET}.o
+	@${LD} -x -r -o ${.TARGET} ${.TARGET}.o
+	@rm -f ${.TARGET}.o
+
+gcrt0.o: crt0.c
+	@echo ${COMPILE.c} -DMCRT0 ${.CURDIR}/crt0.c -o ${.TARGET}
+	@${COMPILE.c} -DMCRT0 ${.CURDIR}/crt0.c -o ${.TARGET}.o
+	@${LD} -x -r -o ${.TARGET} ${.TARGET}.o
+	@rm -f ${.TARGET}.o
+
+crtbegin.o: crtbegin.c
+	@echo ${COMPILE.c} ${ELFDIR}/crtbegin.c -o ${.TARGET}
+	@${COMPILE.c} ${ELFDIR}/crtbegin.c -o ${.TARGET}.o
+	@${LD} -x -r -o ${.TARGET} ${.TARGET}.o
+	@rm -f ${.TARGET}.o
+
+crtbeginS.o: crtbeginS.c
+	@echo ${COMPILE.c} ${PICFLAG} ${ELFDIR}/crtbeginS.c -o ${.TARGET}
+	@${COMPILE.c} ${PICFLAG} ${ELFDIR}/crtbeginS.c -o ${.TARGET}.o
+	@${LD} -x -r -o ${.TARGET} ${.TARGET}.o
+	@rm -f ${.TARGET}.o
+
+crtend.o: crtend.c
+	@echo ${COMPILE.c} ${ELFDIR}/crtend.c -o ${.TARGET}
+	@${COMPILE.c} ${ELFDIR}/crtend.c -o ${.TARGET}.o
+	@${LD} -x -r -o ${.TARGET} ${.TARGET}.o
+	@rm -f ${.TARGET}.o
+
+crtendS.o: crtendS.c
+	@echo ${COMPILE.c} ${PICFLAG} ${ELFDIR}/crtendS.c -o ${.TARGET}
+	@${COMPILE.c} ${PICFLAG} ${ELFDIR}/crtendS.c -o ${.TARGET}.o
+	@${LD} -x -r -o ${.TARGET} ${.TARGET}.o
+	@rm -f ${.TARGET}.o
+
+realinstall:
+	${INSTALL} ${INSTALL_COPY} -o ${BINOWN} -g ${BINGRP} -m 444 ${OBJS} \
+	    ${DESTDIR}/usr/lib
+
+afterdepend:: .depend
+	@(TMP=/tmp/_depend$$$$; \
+	    sed -e 's/^\([^\.]*\).o[ ]*:/\1.o g\1.o:/' \
+	    < .depend > $$TMP; \
+	mv $$TMP .depend)
+
+.include <bsd.prog.mk>
diff --git a/lib/csu/arm/crt0.c b/lib/csu/arm/crt0.c
new file mode 100644
index 00000000000..e7c54ee132f
--- /dev/null
+++ b/lib/csu/arm/crt0.c
@@ -0,0 +1,137 @@
+/*	$NetBSD: crt0.c,v 1.6 2002/01/01 01:31:06 thorpej Exp $	*/
+
+/*
+ * Copyright (C) 1997 Mark Brinicombe
+ * Copyright (C) 1995 Wolfgang Solfrank.
+ * Copyright (C) 1995 TooLs GmbH.
+ * 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 TooLs GmbH.
+ * 4. The name of TooLs GmbH may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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 <sys/cdefs.h>
+#include <sys/param.h>
+
+#include <machine/asm.h>
+#include <stdlib.h>
+
+static char     *_strrchr(const 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 */
+
+extern	void	_start(void);
+void		___start(int, char *[], char *[], void *,
+				const void *, void (*)(void));
+
+__asm("	.text			\n"
+"	.align	0		\n"
+"	.globl	_start		\n"
+"	.globl	__start		\n"
+"_start:			\n"
+"__start:			\n"
+"	mov	r5, r2		/* cleanup */		\n"
+"	mov	r4, r1		/* obj_main */		\n"
+"	mov	r3, r0		/* ps_strings */	\n"
+"	/* Get argc, argv, and envp from stack */	\n"
+"	ldr	r0, [sp, #0x0000]	\n"
+"	add	r1, sp, #0x0004		\n"
+"	add	r2, r1, r0, lsl #2	\n"
+"	add	r2, r2, #0x0004		\n"
+"\n"
+"	/* Ensure the stack is properly aligned before calling C code. */\n"
+#if 1
+"	bic	sp, sp, #7" /*__STRING(STACKALIGNBYTES)*/ "	\n"
+#endif
+"	sub	sp, sp, #8	\n"
+"	str	r5, [sp, #4]	\n"
+"	str	r4, [sp, #0]	\n"
+"\n"
+"	b	" __STRING(___start) " ");
+/*
+"	b	" __STRING(_C_LABEL(___start)) " ");
+*/
+
+void
+___start(int argc, char **argv, char **envp, void *ps_strings,
+	const void *obj, void (*cleanup)(void))
+{
+	char *s;
+
+ 	environ = envp;
+
+	if ((__progname = argv[0]) != NULL) {   /* NULL ptr if argc = 0 */
+		if ((__progname = _strrchr(__progname, '/')) == NULL)
+			__progname = argv[0];
+		else
+			__progname++;
+		for (s = __progname_storage; *__progname &&
+		    s < &__progname_storage[sizeof __progname_storage - 1]; )
+			*s++ = *__progname++;
+		*s = '\0';
+		__progname = __progname_storage;
+	}
+
+#if 0
+	atexit(cleanup);
+#endif
+#ifdef MCRT0
+	atexit(_mcleanup);
+	monstartup((u_long)&_eprol, (u_long)&_etext);
+#endif	/* MCRT0 */
+
+#ifndef SCRT0
+        __init();
+#endif
+
+__asm("__callmain:");		/* Defined for the benefit of debuggers */
+	exit(main(argc, argv, envp));
+}
+
+static char *
+_strrchr(const char *p, char ch)
+{
+	char *save;
+
+	for (save = NULL;; ++p) {
+		if (*p == ch)
+			save = (char *)p;
+		if (!*p)
+			return(save);
+	}
+	/* NOTREACHED */
+}
+asm ("  .section \".text\" \n_eprol:");
+
diff --git a/lib/csu/arm/md_init.h b/lib/csu/arm/md_init.h
new file mode 100644
index 00000000000..c39ed93bca6
--- /dev/null
+++ b/lib/csu/arm/md_init.h
@@ -0,0 +1,65 @@
+/* $OpenBSD: md_init.h,v 1.1 2004/02/01 05:28:20 drahn Exp $ */
+
+/*-
+ * Copyright (c) 2001 Ross Harvey
+ * 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 the NetBSD
+ *      Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+
+/* XXX */
+#define MD_SECT_CALL_FUNC(section, func) \
+	__asm (".section "#section", \"ax\"	\n" \
+	"	adr r0, 1f			\n" \
+	"	ldr r0, [r0]			\n" \
+	"	adr lr, 2f			\n" \
+	"	mov pc,	r0			\n" \
+	"1:	.word " #func "			\n" \
+	"2:					\n" \
+	"	.previous")
+
+#define MD_SECTION_PROLOGUE(sect, entry_pt)	\
+	__asm (					\
+	".section "#sect",\"ax\",%progbits	\n" \
+	"	.globl " #entry_pt "		\n" \
+	"	.type " #entry_pt ",%function	\n" \
+	"	.align 4			\n" \
+	#entry_pt":				\n" \
+	"	mov ip, sp			\n" \
+	"	stmfd sp!, {fp, lr, pc}		\n" \
+	"	sub fp, ip, #4			\n" \
+	"	/* fall thru */			\n" \
+	"	.previous")
+
+
+#define MD_SECTION_EPILOGUE(sect)		\
+	__asm (					\
+	".section "#sect",\"ax\",%progbits	\n" \
+	"	ldmea	fp, {fp, sp, pc}	\n" \
+	"	.previous")