usr/src/cmd/dtrace/test/tst/i386/pid/tst.branch.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/asm_linkage.h>
  30
  31         DGDEF(__fsr_init_value)
  32         .long 0
  33
  34         ENTRY(waiting)
  35         pushl   %ebp
  36         movl    %esp, %ebp
  37         movl    8(%ebp), %eax
  38         movl    (%eax), %eax
  39         popl    %ebp
  40         ret
  41         SET_SIZE(waiting)
  42
  43         ENTRY(main)
  44         pushl   %ebp
  45         movl    %esp, %ebp
  46         subl    $0x4, %esp
  47         movl    $0x0, -4(%ebp)
  48
  49 1:
  50         leal    -4(%ebp), %eax
  51         pushl   %eax
  52         call    waiting
  53         addl    $0x4, %esp
  54
  55         testl   %eax, %eax
  56         jz      1b
  57
  58         addl    $0x4, %esp
  59
  60         xorl    %eax, %eax
  61         testl   %eax, %eax
  62         jz      other
  63
  64         ALTENTRY(bad)
  65         movl    0x0, %eax
  66         SET_SIZE(bad)
  67         SET_SIZE(main)
  68
  69         ENTRY(other)
  70         xorl    %eax, %eax
  71         popl    %ebp
  72         ret
  73         SET_SIZE(other)