1/* $NetBSD: dot_init.h,v 1.6 2007/05/15 16:51:37 skrll Exp $ */
2
3/*-
4 * Copyright (c) 2001 Ross Harvey
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the NetBSD
18 *	Foundation, Inc. and its contributors.
19 * 4. Neither the name of The NetBSD Foundation nor the names of its
20 *    contributors may be used to endorse or promote products derived
21 *    from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 */
35
36#include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
37#include <machine/asm.h>
38
39#define	ASM_SETUP "sp = $30; gp = $29; pv = $27; ra = $26 \n"
40
41#define	MD_SECTION_PROLOGUE(sect, entry_pt)		\
42		__asm (					\
43		ASM_SETUP				\
44		".section "#sect",\"ax\",@progbits	\n"\
45		".global "#entry_pt"			\n"\
46		#entry_pt":				\n"\
47		"	ldgp	gp, 0(pv)		\n"\
48		"	lda	sp, -32(sp)		\n"\
49		"	stq	ra, 0(sp)		\n"\
50		"	stq	gp, 8(sp)		\n"\
51		"	.align	5			\n"\
52		"	/* fall thru */			\n"\
53		".previous")
54
55#define	MD_SECTION_EPILOGUE(sect)			\
56		__asm (					\
57		ASM_SETUP				\
58		".section "#sect",\"ax\",@progbits	\n"\
59		"	ldq	gp, 8(sp)		\n"\
60		"	ldq	ra, 0(sp)		\n"\
61		"	lda	sp, 32(sp)		\n"\
62		"	RET				\n"\
63		".previous")
64
65#define	MD_INIT_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.init, _init)
66#define	MD_FINI_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.fini, _fini)
67
68#define	MD_INIT_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.init)
69#define	MD_FINI_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.fini)
70
71/* We assume we need to reload our GP. */
72#define MD_CALL_STATIC_FUNCTION(section, func) \
73__asm(".section " #section "\n"		\
74"    br $29, 1f		\n"		\
75"1:  ldgp $29, 0($29)	\n"		\
76"    unop		\n"		\
77"    jsr $26, " #func "\n"		\
78"    .align 3; .previous");
79