1 /* Handle shared libraries for GDB, the GNU Debugger. 2 3 Copyright (C) 2000-2013 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_brk. */ 41 int r_brk_offset; 42 43 /* Offset of r_debug.r_ldsomap. */ 44 int r_ldsomap_offset; 45 46 /* Size of struct link_map (or equivalent), or at least enough of it 47 to be able to obtain the fields below. */ 48 int link_map_size; 49 50 /* Offset to l_addr field in struct link_map. */ 51 int l_addr_offset; 52 53 /* Offset to l_ld field in struct link_map. */ 54 int l_ld_offset; 55 56 /* Offset to l_next field in struct link_map. */ 57 int l_next_offset; 58 59 /* Offset to l_prev field in struct link_map. */ 60 int l_prev_offset; 61 62 /* Offset to l_name field in struct link_map. */ 63 int l_name_offset; 64 }; 65 66 /* set_solib_svr4_fetch_link_map_offsets() is intended to be called by 67 a <arch>_gdbarch_init() function. It is used to establish an 68 architecture specific link_map_offsets fetcher for the architecture 69 being defined. */ 70 71 extern void set_solib_svr4_fetch_link_map_offsets 72 (struct gdbarch *gdbarch, struct link_map_offsets *(*func) (void)); 73 74 /* This function is called by thread_db.c. Return the address of the 75 link map for the given objfile. */ 76 extern CORE_ADDR svr4_fetch_objfile_link_map (struct objfile *objfile); 77 78 /* Fetch (and possibly build) an appropriate `struct link_map_offsets' 79 for ILP32 and LP64 SVR4 systems. */ 80 extern struct link_map_offsets *svr4_ilp32_fetch_link_map_offsets (void); 81 extern struct link_map_offsets *svr4_lp64_fetch_link_map_offsets (void); 82 83 /* Return 1 if PC lies in the dynamic symbol resolution code of the 84 SVR4 run time loader. */ 85 int svr4_in_dynsym_resolve_code (CORE_ADDR pc); 86 87 #endif /* solib-svr4.h */ 88