/* $OpenBSD: md_init.h,v 1.12 2023/11/18 16:26:16 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" \
        "       bti     c                       \n" \
        "       sub     sp, sp, #16             \n" \
        "       str     lr, [sp]                \n" \
        "       /* fall thru */                 \n" \
        "       .previous")


#define MD_SECTION_EPILOGUE(sect)               \
        __asm (                                 \
        ".section "#sect",\"ax\",%progbits      \n" \
        "       ldr     lr, [sp]                \n" \
        "       add     sp, sp, #16             \n" \
        "       ret                             \n" \
        "       .previous")


#define MD_CRT0_START                           \
        __asm(                                  \
        ".text                                  \n" \
        "       .align  0                       \n" \
        "       .globl  _start                  \n" \
        "       .globl  __start                 \n" \
        "_start:                                \n" \
        "__start:                               \n" \
        "       bti     c                       \n" \
        "       mov     x3, x2  /* cleanup */   \n" \
        "/* Get argc/argv/envp from stack */    \n" \
        "       ldr     x0, [sp]                \n" \
        "       add     x1, sp, #0x0008         \n" \
        "       add     x2, x1, x0, lsl #3      \n" \
        "       add     x2, x2, #0x0008         \n" \
        "                                       \n" \
        "       b       ___start                \n" \
        ".previous");

#define MD_RCRT0_START                          \
        char **environ, *__progname;            \
        __asm(                                  \
        ".text                                  \n" \
        "       .align  0                       \n" \
        "       .globl  _start                  \n" \
        "       .globl  __start                 \n" \
        "_start:                                \n" \
        "__start:                               \n" \
        "       mov     fp, sp                  \n" \
        "       mov     x0, fp                  \n" \
        "                                       \n" \
        "       sub     sp, sp, #8+8+(16*8)     \n" \
        "       add     x1, sp, #4              \n" \
        "                                       \n" \
        "       adrp    x2, _DYNAMIC            \n" \
        "       add     x2, x2, #:lo12:_DYNAMIC \n" \
        "                                       \n" \
        "       bl      _dl_boot_bind           \n" \
        "                                       \n" \
        "       mov     sp, fp                  \n" \
        "       mov     fp, #0                  \n" \
        "                                       \n" \
        "       mov     x3, #0  /* cleanup */   \n" \
        "/* Get argc/argv/envp from stack */    \n" \
        "       ldr     x0, [sp]                \n" \
        "       add     x1, sp, #0x0008         \n" \
        "       add     x2, x1, x0, lsl #3      \n" \
        "       add     x2, x2, #0x0008         \n" \
        "                                       \n" \
        "       b       ___start                \n" \
        "                                       \n" \
        "_csu_abort:                            \n" \
        "       udf     #0                      \n" \
        ".previous");