gnu/dist/gdb6/gdb/solib-svr4.h

   1 /* Handle shared libraries for GDB, the GNU Debugger.
   2
   3    Copyright (C) 2000, 2004, 2006
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21    Boston, MA 02110-1301, USA.  */
  22
  23 #ifndef SOLIB_SVR4_H
  24 #define SOLIB_SVR4_H
  25
  26 struct objfile;
  27
  28 /* Critical offsets and sizes which describe struct r_debug and
  29    struct link_map on SVR4-like targets.  All offsets and sizes are
  30    in bytes unless otherwise specified.  */
  31
  32 struct link_map_offsets
  33   {
  34     /* Offset and size of r_debug.r_version.  */
  35     int r_version_offset, r_version_size;
  36
  37     /* Offset of r_debug.r_map.  */
  38     int r_map_offset;
  39
  40     /* Offset of r_debug.r_ldsomap.  */
  41     int r_ldsomap_offset;
  42
  43     /* Size of struct link_map (or equivalent), or at least enough of it
  44        to be able to obtain the fields below.  */
  45     int link_map_size;
  46
  47     /* Offset to l_addr field in struct link_map.  */
  48     int l_addr_offset;
  49
  50     /* Size of l_addr field in struct link_map.  */
  51     int l_addr_size;
  52
  53     /* Offset to l_ld field in struct link_map.  */
  54     int l_ld_offset;
  55
  56     /* Size of l_ld field in struct link_map.  */
  57     int l_ld_size;
  58
  59     /* Offset to l_next field in struct link_map.  */
  60     int l_next_offset;
  61
  62     /* Size of l_next field in struct link_map.  */
  63     int l_next_size;
  64
  65     /* Offset to l_prev field in struct link_map.  */
  66     int l_prev_offset;
  67
  68     /* Size of l_prev field in struct link_map.  */
  69     int l_prev_size;
  70
  71     /* Offset to l_name field in struct link_map.  */
  72     int l_name_offset;
  73
  74     /* Size of l_name field in struct link_map.  */
  75     int l_name_size;
  76   };
  77
  78 /* set_solib_svr4_fetch_link_map_offsets() is intended to be called by
  79    a <arch>_gdbarch_init() function.  It is used to establish an
  80    architecture specific link_map_offsets fetcher for the architecture
  81    being defined.  */
  82
  83 extern void set_solib_svr4_fetch_link_map_offsets
  84   (struct gdbarch *gdbarch, struct link_map_offsets *(*func) (void));
  85
  86 /* This function is called by thread_db.c.  Return the address of the
  87    link map for the given objfile.  */
  88 extern CORE_ADDR svr4_fetch_objfile_link_map (struct objfile *objfile);
  89
  90 /* legacy_svr4_fetch_link_map_offsets_hook is a pointer to a function
  91    which is used to fetch link map offsets.  It will only be set
  92    by solib-legacy.c, if at all.  */
  93 extern struct link_map_offsets *(*legacy_svr4_fetch_link_map_offsets_hook) (void);
  94
  95 /* Fetch (and possibly build) an appropriate `struct link_map_offsets'
  96    for ILP32 and LP64 SVR4 systems.  */
  97 extern struct link_map_offsets *svr4_ilp32_fetch_link_map_offsets (void);
  98 extern struct link_map_offsets *svr4_lp64_fetch_link_map_offsets (void);
  99
 100 #endif /* solib-svr4.h */