NetBSD/lib/csu/mips/dot_init.h

138 lines
4.7 KiB
C

/* $NetBSD: dot_init.h,v 1.10 2009/12/14 01:04:02 matt 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 */
#define t9 "$25"
/*
* For O32/O64, allocate 8 "slots" for the stack frame. Store GP in the 4th
* (zero-based) slot (since this is where compiler generated code for fallthru
* processing expects it to be), and the RA in seventh (highest address).
*
* For N32/N64, allocate 4 8-byte "slots" for the stack frame. Store GP in the
* 2nd (zero-based) slot (since ...) and the RA in third (highest address).
*/
#ifdef __mips_o32
#define sPTR_ADDU "addu"
#define sREG_L "lw"
#define sREG_S "sw"
#define sRAOFF "28"
#define sFRAMESZ "32"
#define MD_GPRESTORE /* nothing */
#else
#define sPTR_ADDU "daddu"
#define sREG_L "ld"
#define sREG_S "sd"
#if defined(__mips_n32) || defined(__mips_n64)
#define MD_GPRESTORE "ld $gp,8($sp)" "\n\t"
#define sRAOFF "24"
#define sFRAMESZ "32"
#elif defined(__mips_o64)
#define sRAOFF "56"
#define sFRAMESZ "64"
#define MD_GPRESTORE /* nothing */
#endif
#endif
#ifdef __ABICALLS__
#if defined(__mips_o32) || defined(__mips_o64)
#define MD_FUNCTION_PROLOGUE(entry_pt) \
".set noreorder" "\n\t" \
".cpload "t9 "\n\t" \
".set reorder" "\n\t" \
sPTR_ADDU" $sp,$sp,-"sFRAMESZ "\n\t" \
".cprestore 16" "\n\t" \
sREG_S" $ra,"sRAOFF"($sp)" "\n\t"
#elif defined(__mips_n32) || defined(__mips_n64)
#define MD_FUNCTION_PROLOGUE(entry_pt) \
".set noreorder" "\n\t" \
"daddu $sp,$sp,-32" "\n\t" \
".cpsetup "t9", 8, "#entry_pt "\n\t" \
"sd $ra,24($sp)" "\n\t" \
".set reorder" "\n\t"
#else
#error ABI not supported (__ABICALLS)
#endif
#else
#if defined(__mips_o32) || defined(__mips_o64)
#define MD_FUNCTION_PROLOGUE(entry_pt) \
sPTR_ADDU" $sp,$sp,-"sFRAMESZ "\n\t" \
sREG_S" $ra,"sRAOFF"($sp)" "\n\t"
#elif defined(__mips_n32) || defined(__mips_n64)
/*
* On N32/N64, GP is callee-saved.
*/
#define MD_FUNCTION_PROLOGUE(entry_pt) \
"daddu $sp,$sp,-32" "\n\t" \
"sd $gp,8($sp)" "\n\t" \
"sd $ra,24($sp)" "\n\t"
#else
#error ABI not supported (!__ABICALLS)
#endif
#endif /* __ABICALLS */
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",@progbits" "\n\t" \
".align 2" "\n\t" \
".globl "#entry_pt "\n\t" \
#entry_pt":" "\n\t" \
MD_FUNCTION_PROLOGUE(entry_pt) \
" /* fall thru */" "\n\t" \
".previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits" "\n\t" \
sREG_L" $ra,"sRAOFF"($sp)" "\n\t" \
MD_GPRESTORE \
".set noreorder" "\n\t" \
"j $ra" "\n\t" \
sPTR_ADDU" $sp,$sp,"sFRAMESZ "\n\t" \
".set reorder" "\n\t" \
".previous")
#define MD_INIT_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.init, _init)
#define MD_FINI_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.fini, _fini)
#define MD_INIT_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.init)
#define MD_FINI_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.fini)