usr/src/cmd/sgs/librtld/common/_librtld.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 2006 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef __LIBRTLD_H
  28 #define __LIBRTLD_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include <libelf.h>
  33 #include <rtld.h>
  34 #include <machdep.h>
  35
  36 #ifdef  __cplusplus
  37 extern "C" {
  38 #endif
  39
  40
  41 /*
  42  * Define a cache structure that is used to retain all elf section information.
  43  */
  44 typedef struct cache {
  45         int             c_flags;
  46         Elf_Scn         *c_scn;
  47         Shdr            *c_shdr;
  48         Elf_Data        *c_data;
  49         char            *c_name;
  50         void            *c_info;
  51 } Cache;
  52
  53 #define FLG_C_EXCLUDE   1               /* exclude section from output image */
  54 #define FLG_C_HEAP      2               /* heap section (addition) */
  55 #define FLG_C_RELOC     3               /* relocation section requiring */
  56                                         /*      modification */
  57 #define FLG_C_SHSTR     4               /* section header string table */
  58 #define FLG_C_END       5               /* null terminating section marker */
  59
  60
  61 /*
  62  * Define a structure for maintaining relocation information.  During the first
  63  * pass through an input files relocation records, counts are maintained of the
  64  * number of relocations to recreate in the output image.  The intent is to
  65  * localize any remaining relocation records.  The relocation structure
  66  * indicates the actions that must be performed on the output images relocation
  67  * information.
  68  */
  69 typedef struct reloc {
  70         int             r_flags;
  71         Xword           r_pltndx;       /* pltndx if a JMP relocation */
  72         Addr            r_value;        /* value to apply to relocation */
  73         unsigned long   r_size;         /* size (used for copy relocations) */
  74         const char      *r_name;                /* relocation symbol */
  75 } Reloc;
  76
  77 #define FLG_R_UNDO      0x01            /* undo any relocation offset value */
  78 #define FLG_R_CLR       0x02            /* clear the relocation record */
  79 #define FLG_R_INC       0x04            /* increment the relocation offset */
  80                                         /*      (uses new fixed addr) */
  81 #define FLG_R_APPLY     0x08            /* apply the relocation */
  82
  83
  84 /*
  85  * Define any local prototypes.
  86  */
  87 extern  void    apply_reloc(void *, Reloc *, const char *, uchar_t *, Rt_map *);
  88 extern  void    clear_reloc(void *);
  89 extern  int     count_reloc(Cache *, Cache *, Rt_map *, int, Addr, Xword *,
  90                     Xword *, Xword *, Alist *);
  91 extern  void    inc_reloc(void *, void *, Reloc *, uchar_t *, uchar_t *);
  92 extern  int     syminfo(Cache *, Alist **);
  93 extern  void    undo_reloc(void *, uchar_t *, uchar_t *, Reloc *);
  94 extern  int     update_dynamic(Cache *, Cache *, Rt_map *, int, Addr, Off,
  95                     const char *, Xword, Xword, Xword, Xword, Xword);
  96 extern  void    update_reloc(Cache *, Cache *, Cache *, const char *,
  97                     Rt_map *, Rel **, Rel **, Rel **);
  98 extern  void    update_sym(Cache *, Cache *, Addr, Half, Addr);
  99
 100 #ifdef  __cplusplus
 101 }
 102 #endif
 103
 104 #endif /* __LIBRTLD_H */