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 23struct 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 29struct 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 75extern 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. */ 80extern 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. */ 85extern 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. */ 89extern struct link_map_offsets *svr4_ilp32_fetch_link_map_offsets (void); 90extern struct link_map_offsets *svr4_lp64_fetch_link_map_offsets (void); 91