gdb/solib-svr4.h

   1 /* Handle shared libraries for GDB, the GNU Debugger.
   2
   3    Copyright (C) 2000, 2004, 2006, 2007, 2008, 2009
   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 3 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, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef SOLIB_SVR4_H
  22 #define SOLIB_SVR4_H
  23
  24 struct objfile;
  25 struct target_so_ops;
  26
  27 extern struct target_so_ops svr4_so_ops;
  28
  29 /* Critical offsets and sizes which describe struct r_debug and
  30    struct link_map on SVR4-like targets.  All offsets and sizes are
  31    in bytes unless otherwise specified.  */
  32
  33 struct link_map_offsets
  34   {
  35     /* Offset and size of r_debug.r_version.  */
  36     int r_version_offset, r_version_size;
  37
  38     /* Offset of r_debug.r_map.  */
  39     int r_map_offset;
  40
  41     /* Offset of r_debug.r_brk.  */
  42     int r_brk_offset;
  43
  44     /* Offset of r_debug.r_ldsomap.  */
  45     int r_ldsomap_offset;
  46
  47     /* Size of struct link_map (or equivalent), or at least enough of it
  48        to be able to obtain the fields below.  */
  49     int link_map_size;
  50
  51     /* Offset to l_addr field in struct link_map.  */
  52     int l_addr_offset;
  53
  54     /* Offset to l_ld field in struct link_map.  */
  55     int l_ld_offset;
  56
  57     /* Offset to l_next field in struct link_map.  */
  58     int l_next_offset;
  59
  60     /* Offset to l_prev field in struct link_map.  */
  61     int l_prev_offset;
  62
  63     /* Offset to l_name field in struct link_map.  */
  64     int l_name_offset;
  65   };
  66
  67 /* set_solib_svr4_fetch_link_map_offsets() is intended to be called by
  68    a <arch>_gdbarch_init() function.  It is used to establish an
  69    architecture specific link_map_offsets fetcher for the architecture
  70    being defined.  */
  71
  72 extern void set_solib_svr4_fetch_link_map_offsets
  73   (struct gdbarch *gdbarch, struct link_map_offsets *(*func) (void));
  74
  75 /* This function is called by thread_db.c.  Return the address of the
  76    link map for the given objfile.  */
  77 extern CORE_ADDR svr4_fetch_objfile_link_map (struct objfile *objfile);
  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 /* Return 1 if PC lies in the dynamic symbol resolution code of the
  85    SVR4 run time loader.  */
  86 int svr4_in_dynsym_resolve_code (CORE_ADDR pc);
  87
  88 #endif /* solib-svr4.h */