gdb/solib-svr4.h

   1 /* Handle shared libraries for GDB, the GNU Debugger.
   2
   3    Copyright (C) 2000, 2004, 2006, 2007 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #ifndef SOLIB_SVR4_H
  23 #define SOLIB_SVR4_H
  24
  25 struct objfile;
  26
  27 /* Critical offsets and sizes which describe struct r_debug and
  28    struct link_map on SVR4-like targets.  All offsets and sizes are
  29    in bytes unless otherwise specified.  */
  30
  31 struct link_map_offsets
  32   {
  33     /* Offset and size of r_debug.r_version.  */
  34     int r_version_offset, r_version_size;
  35
  36     /* Offset of r_debug.r_map.  */
  37     int r_map_offset;
  38
  39     /* Offset of r_debug.r_ldsomap.  */
  40     int r_ldsomap_offset;
  41
  42     /* Size of struct link_map (or equivalent), or at least enough of it
  43        to be able to obtain the fields below.  */
  44     int link_map_size;
  45
  46     /* Offset to l_addr field in struct link_map.  */
  47     int l_addr_offset;
  48
  49     /* Offset to l_ld field in struct link_map.  */
  50     int l_ld_offset;
  51
  52     /* Offset to l_next field in struct link_map.  */
  53     int l_next_offset;
  54
  55     /* Offset to l_prev field in struct link_map.  */
  56     int l_prev_offset;
  57
  58     /* Offset to l_name field in struct link_map.  */
  59     int l_name_offset;
  60   };
  61
  62 /* set_solib_svr4_fetch_link_map_offsets() is intended to be called by
  63    a <arch>_gdbarch_init() function.  It is used to establish an
  64    architecture specific link_map_offsets fetcher for the architecture
  65    being defined.  */
  66
  67 extern void set_solib_svr4_fetch_link_map_offsets
  68   (struct gdbarch *gdbarch, struct link_map_offsets *(*func) (void));
  69
  70 /* This function is called by thread_db.c.  Return the address of the
  71    link map for the given objfile.  */
  72 extern CORE_ADDR svr4_fetch_objfile_link_map (struct objfile *objfile);
  73
  74 /* legacy_svr4_fetch_link_map_offsets_hook is a pointer to a function
  75    which is used to fetch link map offsets.  It will only be set
  76    by solib-legacy.c, if at all.  */
  77 extern struct link_map_offsets *(*legacy_svr4_fetch_link_map_offsets_hook) (void);
  78
  79 /* Fetch (and possibly build) an appropriate `struct link_map_offsets'
  80    for ILP32 and LP64 SVR4 systems.  */
  81 extern struct link_map_offsets *svr4_ilp32_fetch_link_map_offsets (void);
  82 extern struct link_map_offsets *svr4_lp64_fetch_link_map_offsets (void);
  83
  84 #endif /* solib-svr4.h */