root/lib/csu/arm/crt1_s.S
/* LINTLIBRARY */
/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright 2001 David E. O'Brien.
 * All rights reserved.
 * Copyright 1996-1998 John D. Polstra.
 * All rights reserved.
 * Copyright (c) 1997 Jason R. Thorpe.
 * Copyright (c) 1995 Christopher G. Demetriou
 * 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 for the
 *          FreeBSD Project.  See https://www.freebsd.org/ for
 *          information about FreeBSD.
 *          This product includes software developed for the
 *          NetBSD Project.  See http://www.netbsd.org/ for
 *          information about NetBSD.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

#include <machine/asm.h>
#include <sys/param.h>
#include <sys/elf_common.h>
#include "notes.h"

ENTRY(_start)
        mov     r5, r2          /* cleanup */
        mov     r4, r1          /* obj_main */
        mov     r3, r0          /* ps_strings */
        /* Get argc, argv, and envp from stack */
        ldr     r0, [sp, #0x0000]
        add     r1, sp, #0x0004
        add     r2, r1, r0, lsl #2
        add     r2, r2, #0x0004
        /* Ensure the stack is properly aligned before calling C code. */
        bic     sp, sp, #7
        sub     sp, sp, #8
        str     r5, [sp, #4]
        str     r4, [sp, #0]

        b        __start
END(_start)

        .section .note.tag,"a",%note
        .p2align        2
        .4byte          2f-1f
        .4byte          4f-3f
        .4byte          NT_FREEBSD_ARCH_TAG
1:      .asciz          NOTE_FREEBSD_VENDOR
2:      .p2align        2
3:      .asciz          MACHINE_ARCH
4:

        .section .note.GNU-stack,"",%progbits