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/* $OpenBSD: md_init.h,v 1.11 2020/10/15 16:30:23 deraadt 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.
*/
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\"\n" \
" bl " #func "\n" \
" .previous")
#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" \
" stwu %r1,-16(%r1) \n" \
" mflr %r0 \n" \
" stw %r0,12(%r1) \n" \
" /* fall thru */ \n" \
" .previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" lwz %r0,12(%r1) \n" \
" mtlr %r0 \n" \
" addi %r1,%r1,16 \n" \
" blr \n" \
" .previous")
#define MD_CRT0_START \
__asm( \
" .text \n" \
" .section \".text\" \n" \
" .align 2 \n" \
" .globl _start \n" \
" .type _start, @function \n" \
" .globl __start \n" \
" .type __start, @function \n" \
"_start: \n" \
"__start: \n" \
" # put cleanup in r6 instead of r7 \n" \
" mr %r6, %r7 \n" \
" b ___start \n" \
)
#define MD_RCRT0_START \
__asm( \
" .text \n" \
" .section \".text\" \n" \
" .align 2 \n" \
" .globl _start \n" \
" .type _start, @function \n" \
" .globl __start \n" \
" .type __start, @function \n" \
"_start: \n" \
"__start: \n" \
" mr %r19, %r1 # save stack in r19 \n" \
" stwu 1, (-16 -((9+3)*4))(%r1) # allocate dl_data \n" \
" \n" \
" # move argument registers to saved registers for startup flush \n" \
" mr %r20, %r3 # argc \n" \
" mr %r21, %r4 # argv \n" \
" mr %r22, %r5 # envp \n" \
" mflr %r27 /* save off old link register */ \n" \
" stw %r27, 4(%r19) # save in normal location \n" \
" \n" \
" bcl 20, 31, 1f \n" \
"1: mflr %r18 \n" \
" addis %r18, %r18, _DYNAMIC-1b@ha \n" \
" addi %r18, %r18, _DYNAMIC-1b@l \n" \
" \n" \
" subi %r3, %r21, 4 # Get stack pointer (arg0 for _dl_boot). \n" \
" addi %r4, %r1, 8 # dl_data \n" \
" mr %r5, %r18 # dynamicp \n" \
" \n" \
" bl _dl_boot_bind@local \n" \
" \n" \
" mtlr %r27 \n" \
" # move argument registers back from saved registers \n" \
" mr %r3, %r20 \n" \
" mr %r4, %r21 \n" \
" mr %r5, %r22 \n" \
" li %r6, 0 \n" \
" b ___start \n" \
" \n" \
" .text \n" \
" .align 2 \n" \
" .globl _dl_exit \n" \
" .type _dl_exit, @function \n" \
"_dl_exit: \n" \
" li %r0, " STR(SYS_exit) " \n" \
" sc \n" \
" .long 0 # illegal \n" \
)
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