e83f7ba2c9
. file- and functionality-compatible with previous situation
(FreeBSD csu) (with a crt1.o -> crt0.o symlink in /usr/lib)
. harmonizes source with netbsd
. harmonizes linker invocation (e.g. clang) with netbsd
. helpful to get some arm code in there for the arm port project
138 lines
4.7 KiB
C
138 lines
4.7 KiB
C
/* $NetBSD: dot_init.h,v 1.10 2009/12/14 01:04:02 matt Exp $ */
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/*-
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* Copyright (c) 2001 Ross Harvey
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* Copyright (c) 2001 Simon Burge
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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#define t9 "$25"
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/*
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* For O32/O64, allocate 8 "slots" for the stack frame. Store GP in the 4th
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* (zero-based) slot (since this is where compiler generated code for fallthru
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* processing expects it to be), and the RA in seventh (highest address).
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*
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* For N32/N64, allocate 4 8-byte "slots" for the stack frame. Store GP in the
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* 2nd (zero-based) slot (since ...) and the RA in third (highest address).
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*/
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#ifdef __mips_o32
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#define sPTR_ADDU "addu"
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#define sREG_L "lw"
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#define sREG_S "sw"
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#define sRAOFF "28"
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#define sFRAMESZ "32"
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#define MD_GPRESTORE /* nothing */
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#else
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#define sPTR_ADDU "daddu"
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#define sREG_L "ld"
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#define sREG_S "sd"
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#if defined(__mips_n32) || defined(__mips_n64)
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#define MD_GPRESTORE "ld $gp,8($sp)" "\n\t"
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#define sRAOFF "24"
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#define sFRAMESZ "32"
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#elif defined(__mips_o64)
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#define sRAOFF "56"
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#define sFRAMESZ "64"
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#define MD_GPRESTORE /* nothing */
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#endif
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#endif
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#ifdef __ABICALLS__
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#if defined(__mips_o32) || defined(__mips_o64)
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#define MD_FUNCTION_PROLOGUE(entry_pt) \
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".set noreorder" "\n\t" \
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".cpload "t9 "\n\t" \
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".set reorder" "\n\t" \
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sPTR_ADDU" $sp,$sp,-"sFRAMESZ "\n\t" \
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".cprestore 16" "\n\t" \
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sREG_S" $ra,"sRAOFF"($sp)" "\n\t"
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#elif defined(__mips_n32) || defined(__mips_n64)
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#define MD_FUNCTION_PROLOGUE(entry_pt) \
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".set noreorder" "\n\t" \
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"daddu $sp,$sp,-32" "\n\t" \
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".cpsetup "t9", 8, "#entry_pt "\n\t" \
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"sd $ra,24($sp)" "\n\t" \
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".set reorder" "\n\t"
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#else
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#error ABI not supported (__ABICALLS)
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#endif
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#else
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#if defined(__mips_o32) || defined(__mips_o64)
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#define MD_FUNCTION_PROLOGUE(entry_pt) \
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sPTR_ADDU" $sp,$sp,-"sFRAMESZ "\n\t" \
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sREG_S" $ra,"sRAOFF"($sp)" "\n\t"
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#elif defined(__mips_n32) || defined(__mips_n64)
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/*
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* On N32/N64, GP is callee-saved.
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*/
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#define MD_FUNCTION_PROLOGUE(entry_pt) \
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"daddu $sp,$sp,-32" "\n\t" \
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"sd $gp,8($sp)" "\n\t" \
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"sd $ra,24($sp)" "\n\t"
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#else
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#error ABI not supported (!__ABICALLS)
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#endif
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#endif /* __ABICALLS */
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#define MD_SECTION_PROLOGUE(sect, entry_pt) \
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__asm ( \
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".section "#sect",\"ax\",@progbits" "\n\t" \
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".align 2" "\n\t" \
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".globl "#entry_pt "\n\t" \
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#entry_pt":" "\n\t" \
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MD_FUNCTION_PROLOGUE(entry_pt) \
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" /* fall thru */" "\n\t" \
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".previous")
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#define MD_SECTION_EPILOGUE(sect) \
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__asm ( \
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".section "#sect",\"ax\",@progbits" "\n\t" \
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sREG_L" $ra,"sRAOFF"($sp)" "\n\t" \
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MD_GPRESTORE \
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".set noreorder" "\n\t" \
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"j $ra" "\n\t" \
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sPTR_ADDU" $sp,$sp,"sFRAMESZ "\n\t" \
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".set reorder" "\n\t" \
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".previous")
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#define MD_INIT_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.init, _init)
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#define MD_FINI_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.fini, _fini)
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#define MD_INIT_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.init)
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#define MD_FINI_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.fini)
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