usr/src/cmd/sgs/rtld/common/_inline_gen.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 /*
  23  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25 #ifndef _INLINE_GEN_H
  26 #define _INLINE_GEN_H
  27
  28 #include        <sys/types.h>
  29 #include        <sys/mman.h>
  30 #include        <rtld.h>
  31
  32 inline static mmapobj_result_t *
  33 find_segment(caddr_t roffset, Rt_map *lmp)
  34 {
  35         mmapobj_result_t        *mpp = MMAPS(lmp);
  36         uint_t                  mnum = MMAPCNT(lmp);
  37
  38         /*
  39          * Scan segments backwards.  The heaviest use of this function stems
  40          * from relocation processing.  And typically, relocations are against
  41          * the data segment.  By scanning segments in reverse order, the data
  42          * segment is processed first.
  43          */
  44         for (mpp += (mnum - 1); mnum; mnum--, mpp--) {
  45                 if ((roffset >= (mpp->mr_addr + mpp->mr_offset)) &&
  46                     (roffset < (mpp->mr_addr + mpp->mr_msize)))
  47                         return (mpp);
  48         }
  49         return (NULL);
  50 }
  51
  52 #endif  /* _INLINE_GEN_H */