196 lines
7.7 KiB
C
196 lines
7.7 KiB
C
/* Shared library declarations for GDB, the GNU Debugger.
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Copyright (C) 1990-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef SOLIST_H
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#define SOLIST_H
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#define SO_NAME_MAX_PATH_SIZE 512 /* FIXME: Should be dynamic */
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/* For domain_enum domain. */
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#include "symtab.h"
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#include "gdb_bfd.h"
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/* Forward declaration for target specific link map information. This
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struct is opaque to all but the target specific file. */
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struct lm_info;
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struct so_list
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{
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/* The following fields of the structure come directly from the
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dynamic linker's tables in the inferior, and are initialized by
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current_sos. */
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struct so_list *next; /* next structure in linked list */
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/* A pointer to target specific link map information. Often this
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will be a copy of struct link_map from the user process, but
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it need not be; it can be any collection of data needed to
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traverse the dynamic linker's data structures. */
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struct lm_info *lm_info;
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/* Shared object file name, exactly as it appears in the
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inferior's link map. This may be a relative path, or something
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which needs to be looked up in LD_LIBRARY_PATH, etc. We use it
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to tell which entries in the inferior's dynamic linker's link
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map we've already loaded. */
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char so_original_name[SO_NAME_MAX_PATH_SIZE];
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/* Shared object file name, expanded to something GDB can open. */
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char so_name[SO_NAME_MAX_PATH_SIZE];
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/* Program space this shared library belongs to. */
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struct program_space *pspace;
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/* The following fields of the structure are built from
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information gathered from the shared object file itself, and
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are set when we actually add it to our symbol tables.
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current_sos must initialize these fields to 0. */
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bfd *abfd;
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char symbols_loaded; /* flag: symbols read in yet? */
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/* objfile with symbols for a loaded library. Target memory is read from
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ABFD. OBJFILE may be NULL either before symbols have been loaded, if
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the file cannot be found or after the command "nosharedlibrary". */
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struct objfile *objfile;
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struct target_section *sections;
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struct target_section *sections_end;
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/* Record the range of addresses belonging to this shared library.
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There may not be just one (e.g. if two segments are relocated
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differently); but this is only used for "info sharedlibrary". */
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CORE_ADDR addr_low, addr_high;
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};
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struct target_so_ops
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{
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/* Adjust the section binding addresses by the base address at
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which the object was actually mapped. */
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void (*relocate_section_addresses) (struct so_list *so,
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struct target_section *);
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/* Free the link map info and any other private data structures
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associated with a so_list entry. */
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void (*free_so) (struct so_list *so);
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/* Reset private data structures associated with SO.
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This is called when SO is about to be reloaded.
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It is also called before free_so when SO is about to be freed. */
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void (*clear_so) (struct so_list *so);
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/* Reset or free private data structures not associated with
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so_list entries. */
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void (*clear_solib) (void);
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/* Target dependent code to run after child process fork. */
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void (*solib_create_inferior_hook) (int from_tty);
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/* Construct a list of the currently loaded shared objects. This
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list does not include an entry for the main executable file.
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Note that we only gather information directly available from the
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inferior --- we don't examine any of the shared library files
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themselves. The declaration of `struct so_list' says which fields
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we provide values for. */
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struct so_list *(*current_sos) (void);
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/* Find, open, and read the symbols for the main executable. If
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FROM_TTYP dereferences to a non-zero integer, allow messages to
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be printed. This parameter is a pointer rather than an int
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because open_symbol_file_object is called via catch_errors and
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catch_errors requires a pointer argument. */
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int (*open_symbol_file_object) (void *from_ttyp);
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/* Determine if PC lies in the dynamic symbol resolution code of
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the run time loader. */
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int (*in_dynsym_resolve_code) (CORE_ADDR pc);
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/* Find and open shared library binary file. */
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gdb_bfd_ref_ptr (*bfd_open) (char *pathname);
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/* Optional extra hook for finding and opening a solib.
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If TEMP_PATHNAME is non-NULL: If the file is successfully opened a
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pointer to a malloc'd and realpath'd copy of SONAME is stored there,
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otherwise NULL is stored there. */
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int (*find_and_open_solib) (const char *soname,
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unsigned o_flags, char **temp_pathname);
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/* Hook for looking up global symbols in a library-specific way. */
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struct block_symbol (*lookup_lib_global_symbol)
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(struct objfile *objfile,
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const char *name,
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const domain_enum domain);
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/* Given two so_list objects, one from the GDB thread list
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and another from the list returned by current_sos, return 1
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if they represent the same library.
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Falls back to using strcmp on so_original_name field when set
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to NULL. */
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int (*same) (struct so_list *gdb, struct so_list *inferior);
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/* Return whether a region of memory must be kept in a core file
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for shared libraries loaded before "gcore" is used to be
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handled correctly when the core file is loaded. This only
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applies when the section would otherwise not be kept in the
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core file (in particular, for readonly sections). */
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int (*keep_data_in_core) (CORE_ADDR vaddr,
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unsigned long size);
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/* Enable or disable optional solib event breakpoints as
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appropriate. This should be called whenever
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stop_on_solib_events is changed. This pointer can be
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NULL, in which case no enabling or disabling is necessary
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for this target. */
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void (*update_breakpoints) (void);
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/* Target-specific processing of solib events that will be
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performed before solib_add is called. This pointer can be
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NULL, in which case no specific preprocessing is necessary
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for this target. */
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void (*handle_event) (void);
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};
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/* Free the memory associated with a (so_list *). */
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void free_so (struct so_list *so);
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/* Return address of first so_list entry in master shared object list. */
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struct so_list *master_so_list (void);
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/* Find main executable binary file. */
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extern char *exec_file_find (const char *in_pathname, int *fd);
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/* Find shared library binary file. */
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extern char *solib_find (const char *in_pathname, int *fd);
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/* Open BFD for shared library file. */
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extern gdb_bfd_ref_ptr solib_bfd_fopen (char *pathname, int fd);
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/* Find solib binary file and open it. */
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extern gdb_bfd_ref_ptr solib_bfd_open (char *in_pathname);
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/* FIXME: gdbarch needs to control this variable. */
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extern struct target_so_ops *current_target_so_ops;
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/* Handler for library-specific global symbol lookup in solib.c. */
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struct block_symbol solib_global_lookup (struct objfile *objfile,
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const char *name,
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const domain_enum domain);
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#endif
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