Add support for AArch64.

1 files changed, 130 insertions, 0 deletions

diff --git a/lib/csu/aarch64/md_init.h b/lib/csu/aarch64/md_init.h
new file mode 100644
index 00000000000..9eb2124f641
--- /dev/null
+++ b/lib/csu/aarch64/md_init.h
@@ -0,0 +1,130 @@
+/* $OpenBSD: md_init.h,v 1.1 2017/01/11 13:59:02 patrick 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.
+ */
+
+#ifdef __PIC__
+	/* This nastyness derived from gcc3 output */
+#define MD_SECT_CALL_FUNC(section, func) \
+	__asm (".section "#section", \"ax\"		\n" \
+	"	bl " #func "				\n" \
+	"	.previous")
+#else
+#define MD_SECT_CALL_FUNC(section, func) \
+	__asm (".section "#section", \"ax\"	\n" \
+	"	adr	x0, 1f			\n" \
+	"	ldr	x0, [x0]		\n" \
+	"	adr	lr, 2f			\n" \
+	"	br	x0			\n" \
+	"1:	.xword " #func "		\n" \
+	"2:					\n" \
+	"	.previous")
+#endif
+
+#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" \
+	"	sub	sp, sp, #16		\n" \
+	"	str	lr, [sp]		\n" \
+	"	/* fall thru */			\n" \
+	"	.previous")
+
+
+#define MD_SECTION_EPILOGUE(sect)		\
+	__asm (					\
+	".section "#sect",\"ax\",%progbits	\n" \
+	"	ldr	lr, [sp]		\n" \
+	"	add	sp, sp, #16		\n" \
+	"	ret				\n" \
+	"	.previous")
+
+
+#define	MD_CRT0_START				\
+	__asm(					\
+	".text					\n" \
+	"	.align	0			\n" \
+	"	.globl	_start			\n" \
+	"	.globl	__start			\n" \
+	"_start:				\n" \
+	"__start:				\n" \
+	"	mov	x3, x2	/* cleanup */	\n" \
+	"/* Get argc/argv/envp from stack */	\n" \
+	"	ldr	x0, [sp]		\n" \
+	"	add	x1, sp, #0x0008		\n" \
+	"	add	x2, x1, x0, lsl #3	\n" \
+	"	add	x2, x2, #0x0008		\n" \
+	"					\n" \
+	"	b	___start		\n" \
+	".previous");
+
+#define	MD_RCRT0_START				\
+	char **environ, *__progname;		\
+	__asm(					\
+	".text					\n" \
+	"	.align	0			\n" \
+	"	.globl	_start			\n" \
+	"	.globl	__start			\n" \
+	"_start:				\n" \
+	"__start:				\n" \
+	"	mov	fp, sp			\n" \
+	"	mov	x0, fp			\n" \
+	"					\n" \
+	"	sub	sp, sp, #8+8+(16*8)	\n" \
+	"	add	x1, sp, #8		\n" \
+	"					\n" \
+	"	adrp	x2, :got:_DYNAMIC	\n" \
+	"					\n" \
+	"	bl	_dl_boot_bind		\n" \
+	"					\n" \
+	"	mov	sp, fp			\n" \
+	"	mov	fp, #0			\n" \
+	"					\n" \
+	"	mov	x3, #0	/* cleanup */	\n" \
+	"/* Get argc/argv/envp from stack */	\n" \
+	"	ldr	x0, [sp]		\n" \
+	"	add	x1, sp, #0x0008		\n" \
+	"	add	x2, x1, x0, lsl #3	\n" \
+	"	add	x2, x2, #0x0008		\n" \
+	"					\n" \
+	"	b	___start		\n" \
+	"					\n" \
+	"_dl_exit:				\n" \
+	"	mov	x8, #1			\n" \
+	"	svc	#0			\n" \
+	"_dl_printf:				\n" \
+	"	ret				\n" \
+	".previous");