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- /* Handle shared libraries for GDB, the GNU Debugger.
- Copyright (C) 2000-2022 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 */
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