| /* Handle shared libraries for GDB, the GNU Debugger. |
| |
| Copyright (C) 2000-2024 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef SOLIB_SVR4_H |
| #define SOLIB_SVR4_H |
| |
| #include "solist.h" |
| |
| struct objfile; |
| struct solib_ops; |
| |
| extern const solib_ops svr4_so_ops; |
| |
| /* Link map info to include in an allocated so_list entry. */ |
| |
| struct lm_info_svr4 final : public lm_info |
| { |
| /* Amount by which addresses in the binary should be relocated to |
| match the inferior. The direct inferior value is L_ADDR_INFERIOR. |
| When prelinking is involved and the prelink base address changes, |
| we may need a different offset - the recomputed offset is in L_ADDR. |
| It is commonly the same value. It is cached as we want to warn about |
| the difference and compute it only once. L_ADDR is valid |
| iff L_ADDR_P. */ |
| CORE_ADDR l_addr = 0, l_addr_inferior = 0; |
| bool l_addr_p = false; |
| |
| /* The target location of lm. */ |
| CORE_ADDR lm_addr = 0; |
| |
| /* Values read in from inferior's fields of the same name. */ |
| CORE_ADDR l_ld = 0, l_next = 0, l_prev = 0, l_name = 0; |
| }; |
| |
| using lm_info_svr4_up = std::unique_ptr<lm_info_svr4>; |
| |
| /* Critical offsets and sizes which describe struct r_debug and |
| struct link_map on SVR4-like targets. All offsets and sizes are |
| in bytes unless otherwise specified. */ |
| |
| struct link_map_offsets |
| { |
| /* Offset and size of r_debug.r_version. */ |
| int r_version_offset, r_version_size; |
| |
| /* Offset of r_debug.r_map. */ |
| int r_map_offset; |
| |
| /* Offset of r_debug.r_brk. */ |
| int r_brk_offset; |
| |
| /* Offset of r_debug.r_ldsomap. */ |
| int r_ldsomap_offset; |
| |
| /* Offset of r_debug_extended.r_next. */ |
| int r_next_offset; |
| |
| /* Size of struct link_map (or equivalent), or at least enough of it |
| to be able to obtain the fields below. */ |
| int link_map_size; |
| |
| /* Offset to l_addr field in struct link_map. */ |
| int l_addr_offset; |
| |
| /* Offset to l_ld field in struct link_map. */ |
| int l_ld_offset; |
| |
| /* Offset to l_next field in struct link_map. */ |
| int l_next_offset; |
| |
| /* Offset to l_prev field in struct link_map. */ |
| int l_prev_offset; |
| |
| /* Offset to l_name field in struct link_map. */ |
| int l_name_offset; |
| }; |
| |
| /* set_solib_svr4_fetch_link_map_offsets() is intended to be called by |
| a <arch>_gdbarch_init() function. It is used to establish an |
| architecture specific link_map_offsets fetcher for the architecture |
| being defined. */ |
| |
| extern void set_solib_svr4_fetch_link_map_offsets |
| (struct gdbarch *gdbarch, struct link_map_offsets *(*func) (void)); |
| |
| /* This function is called by thread_db.c. Return the address of the |
| link map for the given objfile. */ |
| extern CORE_ADDR svr4_fetch_objfile_link_map (struct objfile *objfile); |
| |
| /* Fetch (and possibly build) an appropriate `struct link_map_offsets' |
| for ILP32 and LP64 SVR4 systems. */ |
| extern struct link_map_offsets *svr4_ilp32_fetch_link_map_offsets (void); |
| extern struct link_map_offsets *svr4_lp64_fetch_link_map_offsets (void); |
| |
| /* Return 1 if PC lies in the dynamic symbol resolution code of the |
| SVR4 run time loader. */ |
| int svr4_in_dynsym_resolve_code (CORE_ADDR pc); |
| |
| #endif /* solib-svr4.h */ |