/*      $NetBSD: rtld_start.S,v 1.11 2010/12/05 00:56:07 joerg Exp $    */

/*-
 * Copyright (c) 1998, 2002 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Christos Zoulas and by Charles M. Hannum.
 *
 * 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.
 *
 * 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.
 */

#include <machine/asm.h>

        .text
        .align  4
        .globl  .rtld_start
        .hidden .rtld_start
        .type   .rtld_start,@function
.rtld_start:
        subl    $8,%esp                 # make room of obj_main and exit proc
        pushl   %ebx                    # save ps_strings

        call    1f
1:
        popl    %edx
        leal    _DYNAMIC-1b(%edx),%ecx  # &_DYNAMIC
        movl    %ecx,%ebx
        subl    _GLOBAL_OFFSET_TABLE_-1b(%edx),%ebx

        pushl   %ebx                    # relocbase
        pushl   %ecx                    # &_DYNAMIC
        call    _rtld_relocate_nonplt_self

        leal    12(%esp),%eax           # &cleanup
        pushl   %ebx                    # relocbase
        pushl   %eax                    # sp
        call    _rtld                   # _rtld(sp, relocbase)

        addl    $16,%esp                # pop args

        popl    %ebx                    # %ebx = ps_strings
        popl    %edx                    # %edx = cleanup
        popl    %ecx                    # %ecx = obj_main
        jmp     *%eax

        .align  4
        .globl  _rtld_bind_start
        .hidden _rtld_bind_start
        .type   _rtld_bind_start,@function
_rtld_bind_start:       # (obj, reloff)
        pushf                           # save registers
        pushl   %eax
        pushl   %ecx
        pushl   %edx

        pushl   20(%esp)                # Copy of reloff
        pushl   20(%esp)                # Copy of obj
        call    _rtld_bind              # Call the binder
        addl    $8,%esp                 # pop binder args
        movl    %eax,20(%esp)           # Store function to be called in obj

        popl    %edx
        popl    %ecx
        popl    %eax
        popf

        leal    4(%esp),%esp            # Discard reloff, do not change eflags
        ret