contrib/gdb-6/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 3 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, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef SOLIB_SVR4_H
  21 #define SOLIB_SVR4_H
  22
  23 struct objfile;
  24 struct target_so_ops;
  25
  26 extern struct target_so_ops svr4_so_ops;
  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     /* Offset to l_ld field in struct link_map.  */
  51     int l_ld_offset;
  52
  53     /* Offset to l_next field in struct link_map.  */
  54     int l_next_offset;
  55
  56     /* Offset to l_prev field in struct link_map.  */
  57     int l_prev_offset;
  58
  59     /* Offset to l_name field in struct link_map.  */
  60     int l_name_offset;
  61   };
  62
  63 /* set_solib_svr4_fetch_link_map_offsets() is intended to be called by
  64    a <arch>_gdbarch_init() function.  It is used to establish an
  65    architecture specific link_map_offsets fetcher for the architecture
  66    being defined.  */
  67
  68 extern void set_solib_svr4_fetch_link_map_offsets
  69   (struct gdbarch *gdbarch, struct link_map_offsets *(*func) (void));
  70
  71 /* This function is called by thread_db.c.  Return the address of the
  72    link map for the given objfile.  */
  73 extern CORE_ADDR svr4_fetch_objfile_link_map (struct objfile *objfile);
  74
  75 /* legacy_svr4_fetch_link_map_offsets_hook is a pointer to a function
  76    which is used to fetch link map offsets.  It will only be set
  77    by solib-legacy.c, if at all.  */
  78 extern struct link_map_offsets *(*legacy_svr4_fetch_link_map_offsets_hook) (void);
  79
  80 /* Fetch (and possibly build) an appropriate `struct link_map_offsets'
  81    for ILP32 and LP64 SVR4 systems.  */
  82 extern struct link_map_offsets *svr4_ilp32_fetch_link_map_offsets (void);
  83 extern struct link_map_offsets *svr4_lp64_fetch_link_map_offsets (void);
  84
  85 /* Return 1 if PC lies in the dynamic symbol resolution code of the
  86    SVR4 run time loader.  */
  87 int svr4_in_dynsym_resolve_code (CORE_ADDR pc);
  88
  89 #endif /* solib-svr4.h */