usr/src/lib/common/i386/crti.s

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2001 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26 /*
  27  * Copyright (c) 2013, Joyent, Inc.  All rights reserved.
  28  */
  29
  30 /*
  31  * These crt*.o modules are provided as the bare minimum required
  32  * from a crt*.o for inclusion in building low level system
  33  * libraries.  The are only be to included in libraries which
  34  * contain *no* C++ code and want to avoid the startup code
  35  * that the C++ runtime has introduced into the crt*.o modules.
  36  *
  37  * For further details - see bug#4433015
  38  */
  39
  40         .file   "crti.s"
  41
  42 /*
  43  * Note that when _init and _fini are called the stack needs to be 16-byte
  44  * aligned with a 4-byte bias.  See comment in lib/libc/i386/gen/makectxt.c.
  45  *
  46  * Note: If you change it, you need to change it in the following files as
  47  * well:
  48  *
  49  *  - lib/libc/i386/threads/machdep.c
  50  *  - lib/libc/i386/gen/makectxt.c
  51  *  - lib/common/i386/crt1.s
  52  */
  53
  54 /*
  55  * _init function prologue
  56  */
  57         .section        .init,"ax"
  58         .globl  _init
  59         .type   _init,@function
  60         .align  16
  61 _init:
  62         pushl   %ebp
  63         movl    %esp, %ebp
  64         andl    $-16,%esp
  65         subl    $12,%esp
  66         pushl   %ebx
  67         call    .L1
  68 .L1:    popl    %ebx
  69         addl    $_GLOBAL_OFFSET_TABLE_+[.-.L1], %ebx
  70
  71 /*
  72  * _fini function prologue
  73  */
  74         .section        .fini,"ax"
  75         .globl  _fini
  76         .type   _fini,@function
  77         .align  16
  78 _fini:
  79         pushl   %ebp
  80         movl    %esp, %ebp
  81         andl    $-16,%esp
  82         subl    $12,%esp
  83         pushl   %ebx
  84         call    .L2
  85 .L2:    popl    %ebx
  86         addl    $_GLOBAL_OFFSET_TABLE_+[.-.L2], %ebx