usr/src/lib/libsaveargs/common/saveargs.h

   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  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SAVEARGS_H
  27 #define _SAVEARGS_H
  28
  29 #ifdef __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 #include <sys/types.h>
  34
  35 /*
  36  * The longest instruction sequence in bytes before all 6 arguments are
  37  * saved on the stack.  This value depends on compiler implementation,
  38  * therefore it should be examined periodically to guarantee accuracy.
  39  */
  40 #define SAVEARGS_INSN_SEQ_LEN   256
  41
  42 #define SAVEARGS_NO_ARGS        0       /* no saved arguments */
  43 #define SAVEARGS_TRAD_ARGS      1       /* traditionally located arguments */
  44 #define SAVEARGS_STRUCT_ARGS    2       /* struct return addr pushed as arg0 */
  45
  46 int saveargs_has_args(uint8_t *, size_t, uint_t, int);
  47
  48 #ifdef __cplusplus
  49 }
  50 #endif
  51
  52 #endif  /* _SAVEARGS_H */