| 1 | /* Handle shared libraries for GDB, the GNU Debugger. |
| 2 | |
| 3 | Copyright (C) 2000-2020 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 | #include "solist.h" |
| 24 | |
| 25 | struct objfile; |
| 26 | struct target_so_ops; |
| 27 | |
| 28 | extern struct target_so_ops svr4_so_ops; |
| 29 | |
| 30 | /* Link map info to include in an allocated so_list entry. */ |
| 31 | |
| 32 | struct lm_info_svr4 : public lm_info_base |
| 33 | { |
| 34 | /* Amount by which addresses in the binary should be relocated to |
| 35 | match the inferior. The direct inferior value is L_ADDR_INFERIOR. |
| 36 | When prelinking is involved and the prelink base address changes, |
| 37 | we may need a different offset - the recomputed offset is in L_ADDR. |
| 38 | It is commonly the same value. It is cached as we want to warn about |
| 39 | the difference and compute it only once. L_ADDR is valid |
| 40 | iff L_ADDR_P. */ |
| 41 | CORE_ADDR l_addr = 0, l_addr_inferior = 0; |
| 42 | bool l_addr_p = false; |
| 43 | |
| 44 | /* The target location of lm. */ |
| 45 | CORE_ADDR lm_addr = 0; |
| 46 | |
| 47 | /* Values read in from inferior's fields of the same name. */ |
| 48 | CORE_ADDR l_ld = 0, l_next = 0, l_prev = 0, l_name = 0; |
| 49 | }; |
| 50 | |
| 51 | /* Critical offsets and sizes which describe struct r_debug and |
| 52 | struct link_map on SVR4-like targets. All offsets and sizes are |
| 53 | in bytes unless otherwise specified. */ |
| 54 | |
| 55 | struct link_map_offsets |
| 56 | { |
| 57 | /* Offset and size of r_debug.r_version. */ |
| 58 | int r_version_offset, r_version_size; |
| 59 | |
| 60 | /* Offset of r_debug.r_map. */ |
| 61 | int r_map_offset; |
| 62 | |
| 63 | /* Offset of r_debug.r_brk. */ |
| 64 | int r_brk_offset; |
| 65 | |
| 66 | /* Offset of r_debug.r_ldsomap. */ |
| 67 | int r_ldsomap_offset; |
| 68 | |
| 69 | /* Size of struct link_map (or equivalent), or at least enough of it |
| 70 | to be able to obtain the fields below. */ |
| 71 | int link_map_size; |
| 72 | |
| 73 | /* Offset to l_addr field in struct link_map. */ |
| 74 | int l_addr_offset; |
| 75 | |
| 76 | /* Offset to l_ld field in struct link_map. */ |
| 77 | int l_ld_offset; |
| 78 | |
| 79 | /* Offset to l_next field in struct link_map. */ |
| 80 | int l_next_offset; |
| 81 | |
| 82 | /* Offset to l_prev field in struct link_map. */ |
| 83 | int l_prev_offset; |
| 84 | |
| 85 | /* Offset to l_name field in struct link_map. */ |
| 86 | int l_name_offset; |
| 87 | }; |
| 88 | |
| 89 | /* set_solib_svr4_fetch_link_map_offsets() is intended to be called by |
| 90 | a <arch>_gdbarch_init() function. It is used to establish an |
| 91 | architecture specific link_map_offsets fetcher for the architecture |
| 92 | being defined. */ |
| 93 | |
| 94 | extern void set_solib_svr4_fetch_link_map_offsets |
| 95 | (struct gdbarch *gdbarch, struct link_map_offsets *(*func) (void)); |
| 96 | |
| 97 | /* This function is called by thread_db.c. Return the address of the |
| 98 | link map for the given objfile. */ |
| 99 | extern CORE_ADDR svr4_fetch_objfile_link_map (struct objfile *objfile); |
| 100 | |
| 101 | /* Fetch (and possibly build) an appropriate `struct link_map_offsets' |
| 102 | for ILP32 and LP64 SVR4 systems. */ |
| 103 | extern struct link_map_offsets *svr4_ilp32_fetch_link_map_offsets (void); |
| 104 | extern struct link_map_offsets *svr4_lp64_fetch_link_map_offsets (void); |
| 105 | |
| 106 | /* Return 1 if PC lies in the dynamic symbol resolution code of the |
| 107 | SVR4 run time loader. */ |
| 108 | int svr4_in_dynsym_resolve_code (CORE_ADDR pc); |
| 109 | |
| 110 | #endif /* solib-svr4.h */ |