1 /* Handle shared libraries for GDB, the GNU Debugger. 2 3 Copyright (C) 2000, 2004, 2006, 2007, 2008, 2009, 2010, 2011 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 */ 89