gdb/solib-svr4.h

   1 /* Handle shared libraries for GDB, the GNU Debugger.
   2
   3    Copyright 2000, 2004
   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., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 struct objfile;
  24
  25 /* Critical offsets and sizes which describe struct r_debug and
  26    struct link_map on SVR4-like targets.  All offsets and sizes are
  27    in bytes unless otherwise specified.  */
  28
  29 struct link_map_offsets
  30   {
  31     /* Size of struct r_debug (or equivalent), or at least enough of it to
  32        be able to obtain the r_map field.  */
  33     int r_debug_size;
  34
  35     /* Offset to the r_map field in struct r_debug.  */
  36     int r_map_offset;
  37
  38     /* Size of the r_map field in struct r_debug.  */
  39     int r_map_size;
  40
  41     /* Size of struct link_map (or equivalent), or at least enough of it
  42        to be able to obtain the fields below.  */
  43     int link_map_size;
  44
  45     /* Offset to l_addr field in struct link_map.  */
  46     int l_addr_offset;
  47
  48     /* Size of l_addr field in struct link_map.  */
  49     int l_addr_size;
  50
  51     /* Offset to l_next field in struct link_map.  */
  52     int l_next_offset;
  53
  54     /* Size of l_next field in struct link_map.  */
  55     int l_next_size;
  56
  57     /* Offset to l_prev field in struct link_map.  */
  58     int l_prev_offset;
  59
  60     /* Size of l_prev field in struct link_map.  */
  61     int l_prev_size;
  62
  63     /* Offset to l_name field in struct link_map.  */
  64     int l_name_offset;
  65
  66     /* Size of l_name field in struct link_map.  */
  67     int l_name_size;
  68   };
  69
  70 /* set_solib_svr4_fetch_link_map_offsets() is intended to be called by
  71    a <arch>_gdbarch_init() function.  It is used to establish an
  72    architecture specific link_map_offsets fetcher for the architecture
  73    being defined.  */
  74
  75 extern void set_solib_svr4_fetch_link_map_offsets
  76   (struct gdbarch *gdbarch, struct link_map_offsets *(*func) (void));
  77
  78 /* This function is called by thread_db.c.  Return the address of the
  79    link map for the given objfile.  */
  80 extern CORE_ADDR svr4_fetch_objfile_link_map (struct objfile *objfile);
  81
  82 /* legacy_svr4_fetch_link_map_offsets_hook is a pointer to a function
  83    which is used to fetch link map offsets.  It will only be set
  84    by solib-legacy.c, if at all. */
  85 extern struct link_map_offsets *(*legacy_svr4_fetch_link_map_offsets_hook)(void);
  86
  87 /* Fetch (and possibly build) an appropriate `struct link_map_offsets'
  88    for ILP32 and LP64 SVR4 systems.  */
  89 extern struct link_map_offsets *svr4_ilp32_fetch_link_map_offsets (void);
  90 extern struct link_map_offsets *svr4_lp64_fetch_link_map_offsets (void);