usr/src/lib/libumem/i386/asm_subr.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 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #include <sys/asm_linkage.h>
  28
  29 #define NOP4    \
  30         nop;    \
  31         nop;    \
  32         nop;    \
  33         nop;
  34
  35 #define NOP16   \
  36         NOP4    \
  37         NOP4    \
  38         NOP4    \
  39         NOP4
  40
  41 #define NOP64   \
  42         NOP16   \
  43         NOP16   \
  44         NOP16   \
  45         NOP16
  46
  47 #define NOP256  \
  48         NOP64   \
  49         NOP64   \
  50         NOP64   \
  51         NOP64
  52
  53
  54 #if defined(__amd64)
  55
  56         ENTRY(getfp)
  57         movq    %rbp, %rax
  58         ret
  59         SET_SIZE(getfp)
  60
  61 #else   /* __i386 */
  62
  63         ENTRY(getfp)
  64         movl    %ebp, %eax
  65         ret
  66         SET_SIZE(getfp)
  67
  68 #endif
  69
  70 #ifndef UMEM_STANDALONE
  71         ENTRY(_breakpoint)
  72         int     $3
  73         ret
  74         SET_SIZE(_breakpoint)
  75 #endif
  76
  77         ENTRY(_malloc)
  78         jmp umem_malloc;
  79         NOP256
  80         NOP256
  81 #if defined(__amd64)
  82         NOP64
  83 #endif
  84         SET_SIZE(_malloc)
  85
  86         ENTRY(_free)
  87         jmp umem_malloc_free;
  88         NOP256
  89         NOP256
  90 #if defined(__amd64)
  91         NOP64
  92 #endif
  93         SET_SIZE(_free)
  94
  95         ANSI_PRAGMA_WEAK2(malloc,_malloc,function)
  96         ANSI_PRAGMA_WEAK2(free,_free,function)
  97