/* Handle shared libraries for GDB, the GNU Debugger. Copyright (C) 2000-2021 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 target_so_ops; extern struct target_so_ops svr4_so_ops; /* Link map info to include in an allocated so_list entry. */ struct lm_info_svr4 : public lm_info_base { /* 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; }; /* 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; /* 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 */