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/* $OpenBSD: md_init.h,v 1.21 2023/11/18 16:26:16 deraadt 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.
*/
/*
* Allocate 32 bytes for the stack frame. Store GP at SP+16 (since
* this is where code generated by the compiler for fallthru processing
* expects it to be), and the RA at SP+24.
*/
/* this is gross... */
#ifdef __ABICALLS__
#define MD_FUNCTION_PROLOGUE(entry_pt) \
" .frame $sp,32,$31 \n" \
" .set reorder \n" \
" dsubu $sp,$sp,32 \n" \
" .cpsetup $25, 16, "#entry_pt" \n" \
" sd $ra ,24($sp) \n"
#else
#define MD_FUNCTION_PROLOGUE(entry_pt) \
" dsubu $sp,$sp,32 \n" \
" sd $ra ,24($sp) \n"
#endif
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
".align 2 \n" \
".globl "#entry_pt" \n" \
".type "#entry_pt",@function \n" \
".ent "#entry_pt" \n" \
#entry_pt": \n" \
MD_FUNCTION_PROLOGUE(entry_pt) \
" /* fall thru */ \n" \
".end "#entry_pt" \n" \
".previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" ld $ra ,24($sp) \n" \
" # next should have been a .cpreturn \n" \
" ld $gp,16($sp) \n" \
" .set noreorder \n" \
" j $ra \n" \
" daddu $sp,$sp,32 \n" \
" .set reorder \n" \
".previous")
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\" \n" \
" .local " #func " \n" \
" jal " #func " \n" \
".previous")
#define MD_CRT0_START \
__asm( \
".text \n" \
" .align 3 \n" \
" .globl __start \n" \
" .ent __start \n" \
" .type __start, @function \n" \
"__start: \n" \
" lui $gp, %hi(%neg(%gp_rel(__start))) \n" \
" addiu $gp, $gp, %lo(%neg(%gp_rel(__start))) \n" \
" daddu $gp, $gp, $t9 \n" \
" move $a0, $sp \n" \
" dsrl $a1, $sp, 4 \n" /* align stack on a */ \
" dsll $sp, $a1, 4 \n" /* 16 byte boundary */ \
" move $a1, $v0 \n" \
" .local ___start \n" \
" dla $t9, ___start \n" \
" jr $t9 \n" \
" .end __start \n" \
" .previous")
#define MD_RCRT0_START \
__asm( \
".text \n" \
" .align 3 \n" \
" .globl __start \n" \
" .ent __start \n" \
" .type __start, @function \n" \
"__start: \n" \
" dsubu $sp, $sp, 160 \n" \
" lui $gp, %hi(%neg(%gp_rel(__start))) \n" \
" addiu $gp, $gp, %lo(%neg(%gp_rel(__start))) \n" \
" daddu $gp, $gp, $t9 \n" \
" dla $s1, 1f \n" \
" bgezal $zero, 1f \n" \
"1: \n" \
" dsubu $s0, $ra, $s1 \n" \
" daddu $a0, $sp, 160 \n" \
" daddu $a1, $sp, 0 \n" \
" dla $a2, _DYNAMIC \n" \
" daddu $a2, $s0 \n" \
" dla $t9, _dl_boot_bind \n" \
" daddu $t9, $s0 \n" \
" jalr $t9 \n" \
" daddu $sp, $sp, 160 \n" \
" move $a0, $sp \n" \
" dsrl $a1, $sp, 4 \n" /* align stack on a */ \
" dsll $sp, $a1, 4 \n" /* 16 byte boundary */ \
" move $a1, $zero \n" \
" .local ___start \n" \
" dla $t9, ___start \n" \
" jr $t9 \n" \
" .end __start \n" \
" .globl _csu_abort \n" \
" .ent _csu_abort \n" \
" .type _csu_abort, @function \n" \
"_csu_abort: \n" \
" teq zero, zero, 0x52 \n" \
" .end _csu_abort \n" \
" .previous")
struct kframe {
long kargc;
char *kargv[1]; /* size depends on kargc */
char kargstr[1]; /* size varies */
char kenvstr[1]; /* size varies */
};
#define MD_START_ARGS struct kframe *kfp, void (*cleanup)(void)
#define MD_START_SETUP \
char **argv, **envp; \
long argc; \
\
argc = kfp->kargc; \
argv = &kfp->kargv[0]; \
envp = argv + argc + 1;
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