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/* $OpenBSD: md_init.h,v 1.8 2017/08/11 20:13:31 guenther Exp $ */
/* $NetBSD: dot_init.h,v 1.3 2005/12/24 22:02:10 perry 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_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" .globl " #entry_pt " \n" \
" .type " #entry_pt ",@function \n" \
#entry_pt": \n" \
" sts.l pr, @-r15 \n" \
" .align 2 \n" \
" /* fall thru */ \n" \
".previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" lds.l @r15+, pr \n" \
" rts \n" \
" nop \n" \
".previous")
/*
* We need to put the function pointer in our own constant
* pool (otherwise it might be too far away to reference).
*/
#define MD_SECT_CALL_FUNC(section, func) \
__asm(".section " #section "\n" \
" mov.l 1f, r1 \n" \
" mova 2f, r0 \n" \
" braf r1 \n" \
" lds r0, pr \n" \
"0: .p2align 2 \n" \
"1: .long " #func " - 0b \n" \
"2: .previous");
#if defined(__SH4__) && !defined(__SH4_NOFPU__)
#include <machine/fpu.h>
#define MD_FPU_START \
void __set_fpscr(unsigned int); \
unsigned int __fpscr_values[2];
#define MD_START_SETUP \
__set_fpscr(0); \
__fpscr_values[0] |= FPSCR_DN; \
__fpscr_values[1] |= FPSCR_DN; \
__asm volatile ("lds %0, fpscr" \
: : "r" (__fpscr_values[1]));
#else
#define MD_FPU_START
#endif /* defined(__SH4__) && !defined(__SH4_NOFPU__) */
#define MD_CRT0_START \
MD_FPU_START \
__asm (".globl __start; __start = ___start")
#define MD_RCRT0_START \
MD_FPU_START \
__asm ( \
".text \n" \
" .align 2 \n" \
" .globl __start \n" \
" .type __start,@function \n" \
"__start: \n" \
" mov r15, r12 \n" \
" mov r15, r4 \n" \
" add #-72, r15 \n" \
" mov r15, r5 \n" \
" bsr 1f \n" \
" nop \n" \
"1: \n" \
".L_offbase: \n" \
" sts pr, r0 \n" \
" mov.l .L_dynamic, r6 \n" \
" add r0, r6 \n" \
" mov.l .L_boot_bind, r0 \n" \
" bsrf r0 \n" \
" nop \n" \
".L_call_boot_bind: \n" \
" mov r12, r15 \n" \
" mov.l @r15, r4 /* argc */ \n" \
" mov r15, r5 \n" \
" add #4, r5 /* argv */ \n" \
" mov r4, r6 \n" \
" add #1, r6 \n" \
" shll2 r6 \n" \
" add r5, r6 /* envp */ \n" \
" bra ___start \n" \
" mov #0, r7 /* cleanup */ \n" \
" .align 2 \n" \
".L_boot_bind: \n" \
" .long _dl_boot_bind - .L_call_boot_bind \n" \
".L_datasize: \n" \
" .long 4 + 4 + (16 * 4) \n" \
".L_dynamic: \n" \
" .long _DYNAMIC - .L_offbase \n" \
\
" .align 2 \n" \
" .globl _dl_exit \n" \
" .type _dl_exit,@function \n" \
"_dl_exit: \n" \
" mov #1, r0 \n" \
" .word 0xc380 /* trapa #0x80 */ \n" \
".previous")
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