/* $OpenBSD: md_init.h,v 1.11 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"  \
        "       call " #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 16                       \n" \
        #entry_pt":                             \n" \
        "       endbr64                         \n" \
        "       subq    $8,%rsp                 \n" \
        "       .previous")


#define MD_SECTION_EPILOGUE(sect)               \
        __asm (                                 \
        ".section "#sect",\"ax\",@progbits      \n" \
        "       addq    $8,%rsp                 \n" \
        "       ret                             \n" \
        "       .previous")


#define MD_CRT0_START                           \
        __asm(                                  \
        ".text                                  \n" \
        "       .align  8                       \n" \
        "       .globl  __start                 \n" \
        "       .globl  _start                  \n" \
        "_start:                                \n" \
        "__start:                               \n" \
        "       endbr64                         \n" \
        "       movq    %rdx,%rcx               \n" \
        "       movq    (%rsp),%rdi             \n" \
        "       leaq    16(%rsp,%rdi,8),%rdx    \n" \
        "       leaq    8(%rsp),%rsi            \n" \
        "       subq    $8,%rsp                 \n" \
        "       andq    $~15,%rsp               \n" \
        "       addq    $8,%rsp                 \n" \
        "       jmp     ___start                \n" \
        "       .previous")

#define MD_RCRT0_START                                  \
        __asm(                                          \
        ".text                                          \n" \
        "       .align  8                               \n" \
        "       .globl  __start                         \n" \
        "       .type   __start,@function               \n" \
        "_start:                                        \n" \
        "__start:                                       \n" \
        "       endbr64                                 \n" \
        "       movq    %rsp, %r12                      \n" \
        "       subq    $8, %rsp                        \n" \
        "       andq    $~15, %rsp                      \n" \
        "       addq    $8, %rsp                        \n" \
        "       pushq   %rbx                            \n" \
        "       subq    $(16*8), %rsp                   \n" \
        "       leaq    _DYNAMIC(%rip),%rdx             \n" \
        "       movq    %rsp, %rsi                      \n" \
        "       movq    %r12, %rdi                      \n" \
        "       call    _dl_boot_bind@PLT               \n" \
        "                                               \n" \
        "       movq    $0, %rcx                        \n" \
        "       movq    %r12, %rsp                      \n" \
        "       movq    (%rsp),%rdi                     \n" \
        "       leaq    16(%rsp,%rdi,8),%rdx            \n" \
        "       leaq    8(%rsp),%rsi                    \n" \
        "       subq    $8,%rsp                         \n" \
        "       andq    $~15,%rsp                       \n" \
        "       addq    $8,%rsp                         \n" \
        "       jmp     ___start                        \n" \
        "                                               \n" \
        "       .global _csu_abort                      \n" \
        "       .type   _csu_abort,@function            \n" \
        "       .align  8                               \n" \
        "_csu_abort:                                    \n" \
        "       endbr64                                 \n" \
        "       int3                                    \n" \
        "       .previous")