NetBSD/lib/csu/mips/dot_init.h

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/* $NetBSD: dot_init.h,v 1.2 2001/08/16 03:44:46 simonb Exp $ */
/*-
* Copyright (c) 2001 Ross Harvey
* Copyright (c) 2001 Simon Burge
* 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.
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
/*
* These must be extern to avoid warnings ("declared static but never defined")
* However, only the declaration is extern, the actually __asm() defines them
* as static.
*/
#define INIT_FALLTHRU_DECL void init_fallthru(void)
#define FINI_FALLTHRU_DECL void fini_fallthru(void)
#define INIT_FALLTHRU() init_fallthru()
#define FINI_FALLTHRU() fini_fallthru()
#define ra "$31"
/*
* The stack frame is 16 bytes long; big enough to store the GP saved
* by .cpload (at offset 0) and the caller's RA (at offset 8),
* allowing for 64bit addresses.
*/
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",@progbits \n"\
#entry_pt": \n"\
" subu $sp,$sp,16 \n"\
" sw "ra",8($sp) \n"\
" /* fall thru */ \n"\
".previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits \n"\
" lw "ra",8($sp) \n"\
" .set noreorder \n"\
" j "ra" \n"\
" addu $sp,$sp,16 \n"\
" .set reorder \n"\
".previous")
#define MD_INIT_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.init, init_fallthru)
#define MD_FINI_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.fini, fini_fallthru)
#define MD_INIT_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.init)
#define MD_FINI_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.fini)