/* Shared library declarations for GDB, the GNU Debugger.
- Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000,
- 2001, 2007, 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 1990-2018 Free Software Foundation, Inc.
This file is part of GDB.
#define SO_NAME_MAX_PATH_SIZE 512 /* FIXME: Should be dynamic */
/* For domain_enum domain. */
#include "symtab.h"
+#include "gdb_bfd.h"
-/* Forward declaration for target specific link map information. This
- struct is opaque to all but the target specific file. */
-struct lm_info;
+#define ALL_SO_LIBS(so) \
+ for (so = so_list_head; \
+ so != NULL; \
+ so = so->next)
+
+/* Base class for target-specific link map information. */
+
+struct lm_info_base
+{
+};
struct so_list
{
/* A pointer to target specific link map information. Often this
will be a copy of struct link_map from the user process, but
it need not be; it can be any collection of data needed to
- traverse the dynamic linker's data structures. */
- struct lm_info *lm_info;
+ traverse the dynamic linker's data structures. */
+ lm_info_base *lm_info;
/* Shared object file name, exactly as it appears in the
inferior's link map. This may be a relative path, or something
map we've already loaded. */
char so_original_name[SO_NAME_MAX_PATH_SIZE];
- /* shared object file name, expanded to something GDB can open */
+ /* Shared object file name, expanded to something GDB can open. */
char so_name[SO_NAME_MAX_PATH_SIZE];
/* Program space this shared library belongs to. */
current_sos must initialize these fields to 0. */
bfd *abfd;
- char symbols_loaded; /* flag: symbols read in yet? */
- char from_tty; /* flag: print msgs? */
- struct objfile *objfile; /* objfile for loaded lib */
+ char symbols_loaded; /* flag: symbols read in yet? */
+
+ /* objfile with symbols for a loaded library. Target memory is read from
+ ABFD. OBJFILE may be NULL either before symbols have been loaded, if
+ the file cannot be found or after the command "nosharedlibrary". */
+ struct objfile *objfile;
+
struct target_section *sections;
struct target_section *sections_end;
/* Record the range of addresses belonging to this shared library.
There may not be just one (e.g. if two segments are relocated
- differently); but this is only used for "info sharedlibrary". */
+ differently). This is used for "info sharedlibrary" and
+ the MI command "-file-list-shared-libraries". The latter has a format
+ that supports outputting multiple segments once the related code
+ supports them. */
CORE_ADDR addr_low, addr_high;
};
void (*relocate_section_addresses) (struct so_list *so,
struct target_section *);
- /* Free the the link map info and any other private data
- structures associated with a so_list entry. */
+ /* Free the link map info and any other private data structures
+ associated with a so_list entry. */
void (*free_so) (struct so_list *so);
+ /* Reset private data structures associated with SO.
+ This is called when SO is about to be reloaded.
+ It is also called before free_so when SO is about to be freed. */
+ void (*clear_so) (struct so_list *so);
+
/* Reset or free private data structures not associated with
so_list entries. */
void (*clear_solib) (void);
/* Target dependent code to run after child process fork. */
- void (*solib_create_inferior_hook) (void);
+ void (*solib_create_inferior_hook) (int from_tty);
- /* Do additional symbol handling, lookup, etc. after symbols
- for a shared object have been loaded. */
- void (*special_symbol_handling) (void);
+ /* Construct a list of the currently loaded shared objects. This
+ list does not include an entry for the main executable file.
- /* Construct a list of the currently loaded shared objects. */
+ Note that we only gather information directly available from the
+ inferior --- we don't examine any of the shared library files
+ themselves. The declaration of `struct so_list' says which fields
+ we provide values for. */
struct so_list *(*current_sos) (void);
- /* Find, open, and read the symbols for the main executable. */
- int (*open_symbol_file_object) (void *from_ttyp);
+ /* Find, open, and read the symbols for the main executable. If
+ FROM_TTY is non-zero, allow messages to be printed. */
+ int (*open_symbol_file_object) (int from_ttyp);
/* Determine if PC lies in the dynamic symbol resolution code of
- the run time loader */
+ the run time loader. */
int (*in_dynsym_resolve_code) (CORE_ADDR pc);
/* Find and open shared library binary file. */
- bfd *(*bfd_open) (char *pathname);
+ gdb_bfd_ref_ptr (*bfd_open) (const char *pathname);
- /* Extra hook for finding and opening a solib.
- Convenience function for remote debuggers finding host libs. */
- int (*find_and_open_solib) (char *soname,
- unsigned o_flags, char **temp_pathname);
+ /* Optional extra hook for finding and opening a solib.
+ If TEMP_PATHNAME is non-NULL: If the file is successfully opened a
+ pointer to a malloc'd and realpath'd copy of SONAME is stored there,
+ otherwise NULL is stored there. */
+ int (*find_and_open_solib) (const char *soname,
+ unsigned o_flags,
+ gdb::unique_xmalloc_ptr<char> *temp_pathname);
/* Hook for looking up global symbols in a library-specific way. */
- struct symbol * (*lookup_lib_global_symbol) (const struct objfile *objfile,
- const char *name,
- const char *linkage_name,
- const domain_enum domain);
+ struct block_symbol (*lookup_lib_global_symbol)
+ (struct objfile *objfile,
+ const char *name,
+ const domain_enum domain);
/* Given two so_list objects, one from the GDB thread list
and another from the list returned by current_sos, return 1
core file (in particular, for readonly sections). */
int (*keep_data_in_core) (CORE_ADDR vaddr,
unsigned long size);
+
+ /* Enable or disable optional solib event breakpoints as
+ appropriate. This should be called whenever
+ stop_on_solib_events is changed. This pointer can be
+ NULL, in which case no enabling or disabling is necessary
+ for this target. */
+ void (*update_breakpoints) (void);
+
+ /* Target-specific processing of solib events that will be
+ performed before solib_add is called. This pointer can be
+ NULL, in which case no specific preprocessing is necessary
+ for this target. */
+ void (*handle_event) (void);
};
/* Free the memory associated with a (so_list *). */
void free_so (struct so_list *so);
+/* A deleter that calls free_so. */
+struct so_deleter
+{
+ void operator() (struct so_list *so) const
+ {
+ free_so (so);
+ }
+};
+
+/* A unique pointer to a so_list. */
+typedef std::unique_ptr<so_list, so_deleter> so_list_up;
+
/* Return address of first so_list entry in master shared object list. */
struct so_list *master_so_list (void);
+/* Find main executable binary file. */
+extern gdb::unique_xmalloc_ptr<char> exec_file_find (const char *in_pathname,
+ int *fd);
+
/* Find shared library binary file. */
-extern char *solib_find (char *in_pathname, int *fd);
+extern gdb::unique_xmalloc_ptr<char> solib_find (const char *in_pathname,
+ int *fd);
/* Open BFD for shared library file. */
-extern bfd *solib_bfd_fopen (char *pathname, int fd);
+extern gdb_bfd_ref_ptr solib_bfd_fopen (const char *pathname, int fd);
/* Find solib binary file and open it. */
-extern bfd *solib_bfd_open (char *in_pathname);
+extern gdb_bfd_ref_ptr solib_bfd_open (const char *in_pathname);
-/* FIXME: gdbarch needs to control this variable */
+/* FIXME: gdbarch needs to control this variable. */
extern struct target_so_ops *current_target_so_ops;
/* Handler for library-specific global symbol lookup in solib.c. */
-struct symbol *solib_global_lookup (const struct objfile *objfile,
- const char *name,
- const char *linkage_name,
- const domain_enum domain);
+struct block_symbol solib_global_lookup (struct objfile *objfile,
+ const char *name,
+ const domain_enum domain);
#endif
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