/* Definitions for reading symbol files into GDB.
- Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996
- Free Software Foundation, Inc.
+
+ Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ 2000, 2001, 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#if !defined (SYMFILE_H)
#define SYMFILE_H
/* This file requires that you first include "bfd.h". */
+#include "symtab.h"
-/* Partial symbols are stored in the psymbol_cache and pointers to them
- are kept in a dynamically grown array that is obtained from malloc and
- grown as necessary via realloc. Each objfile typically has two of these,
- one for global symbols and one for static symbols. Although this adds
- a level of indirection for storing or accessing the partial symbols,
- it allows us to throw away duplicate psymbols and set all pointers
- to the single saved instance. */
+/* Opaque declarations. */
+struct section_table;
+struct objfile;
+struct obj_section;
+struct obstack;
+struct block;
+
+/* Partial symbols are stored in the psymbol_cache and pointers to
+ them are kept in a dynamically grown array that is obtained from
+ malloc and grown as necessary via realloc. Each objfile typically
+ has two of these, one for global symbols and one for static
+ symbols. Although this adds a level of indirection for storing or
+ accessing the partial symbols, it allows us to throw away duplicate
+ psymbols and set all pointers to the single saved instance. */
struct psymbol_allocation_list
- {
+{
- /* Pointer to beginning of dynamically allocated array of pointers to
- partial symbols. The array is dynamically expanded as necessary to
- accommodate more pointers. */
+ /* Pointer to beginning of dynamically allocated array of pointers
+ to partial symbols. The array is dynamically expanded as
+ necessary to accommodate more pointers. */
- struct partial_symbol **list;
+ struct partial_symbol **list;
- /* Pointer to next available slot in which to store a pointer to a partial
- symbol. */
+ /* Pointer to next available slot in which to store a pointer to a
+ partial symbol. */
- struct partial_symbol **next;
+ struct partial_symbol **next;
- /* Number of allocated pointer slots in current dynamic array (not the
- number of bytes of storage). The "next" pointer will always point
- somewhere between list[0] and list[size], and when at list[size] the
- array will be expanded on the next attempt to store a pointer. */
+ /* Number of allocated pointer slots in current dynamic array (not
+ the number of bytes of storage). The "next" pointer will always
+ point somewhere between list[0] and list[size], and when at
+ list[size] the array will be expanded on the next attempt to
+ store a pointer. */
- int size;
- };
+ int size;
+};
/* Define an array of addresses to accommodate non-contiguous dynamic
loading of modules. This is for use when entering commands, so we
- can keep track of the section names until we read the file and
- can map them to bfd sections. This structure is also used by
- solib.c to communicate the section addresses in shared objects to
- symbol_file_add (). */
-
-#define MAX_SECTIONS 40
-struct section_addr_info
+ can keep track of the section names until we read the file and can
+ map them to bfd sections. This structure is also used by solib.c
+ to communicate the section addresses in shared objects to
+ symbol_file_add (). */
+
+struct section_addr_info
{
+ /* The number of sections for which address information is
+ available. */
+ size_t num_sections;
/* Sections whose names are file format dependent. */
struct other_sections
{
CORE_ADDR addr;
char *name;
int sectindex;
- } other[MAX_SECTIONS];
+ } other[1];
+};
+
+struct symfile_segment_data
+{
+ /* How many segments are present in this file. If there are
+ two, the text segment is the first one and the data segment
+ is the second one. */
+ int num_segments;
+
+ /* If NUM_SEGMENTS is greater than zero, the original base address
+ of each segment. */
+ CORE_ADDR *segment_bases;
+
+ /* If NUM_SEGMENTS is greater than zero, the memory size of each
+ segment. */
+ CORE_ADDR *segment_sizes;
+
+ /* If NUM_SEGMENTS is greater than zero, this is an array of entries
+ recording which segment contains each BFD section. It is
+ ordered by section index. A zero means that the section is not
+ in any segment. */
+ int *segment_info;
};
/* Structure to keep track of symbol reading functions for various
object file types. */
struct sym_fns
- {
+{
- /* BFD flavour that we handle, or (as a special kludge, see xcoffread.c,
- (enum bfd_flavour)-1 for xcoff). */
+ /* BFD flavour that we handle, or (as a special kludge, see
+ xcoffread.c, (enum bfd_flavour)-1 for xcoff). */
- enum bfd_flavour sym_flavour;
+ enum bfd_flavour sym_flavour;
- /* Initializes anything that is global to the entire symbol table. It is
- called during symbol_file_add, when we begin debugging an entirely new
- program. */
+ /* Initializes anything that is global to the entire symbol table.
+ It is called during symbol_file_add, when we begin debugging an
+ entirely new program. */
- void (*sym_new_init) (struct objfile *);
+ void (*sym_new_init) (struct objfile *);
- /* Reads any initial information from a symbol file, and initializes the
- struct sym_fns SF in preparation for sym_read(). It is called every
- time we read a symbol file for any reason. */
+ /* Reads any initial information from a symbol file, and initializes
+ the struct sym_fns SF in preparation for sym_read(). It is
+ called every time we read a symbol file for any reason. */
- void (*sym_init) (struct objfile *);
+ void (*sym_init) (struct objfile *);
- /* sym_read (objfile, mainline)
- Reads a symbol file into a psymtab (or possibly a symtab).
- OBJFILE is the objfile struct for the file we are reading.
- MAINLINE is 1 if this is the
- main symbol table being read, and 0 if a secondary
- symbol file (e.g. shared library or dynamically loaded file)
- is being read. */
+ /* sym_read (objfile, mainline) Reads a symbol file into a psymtab
+ (or possibly a symtab). OBJFILE is the objfile struct for the
+ file we are reading. MAINLINE is 1 if this is the main symbol
+ table being read, and 0 if a secondary symbol file (e.g. shared
+ library or dynamically loaded file) is being read. */
- void (*sym_read) (struct objfile *, int);
+ void (*sym_read) (struct objfile *, int);
- /* Called when we are finished with an objfile. Should do all cleanup
- that is specific to the object file format for the particular objfile. */
+ /* Called when we are finished with an objfile. Should do all
+ cleanup that is specific to the object file format for the
+ particular objfile. */
- void (*sym_finish) (struct objfile *);
+ void (*sym_finish) (struct objfile *);
- /* This function produces a file-dependent section_offsets structure,
- allocated in the objfile's storage, and based on the parameter.
- The parameter is currently a CORE_ADDR (FIXME!) for backward compatibility
- with the higher levels of GDB. It should probably be changed to
- a string, where NULL means the default, and others are parsed in a file
- dependent way. */
+ /* This function produces a file-dependent section_offsets
+ structure, allocated in the objfile's storage, and based on the
+ parameter. The parameter is currently a CORE_ADDR (FIXME!) for
+ backward compatibility with the higher levels of GDB. It should
+ probably be changed to a string, where NULL means the default,
+ and others are parsed in a file dependent way. */
- void (*sym_offsets) (struct objfile *, struct section_addr_info *);
+ void (*sym_offsets) (struct objfile *, struct section_addr_info *);
- /* Finds the next struct sym_fns. They are allocated and initialized
- in whatever module implements the functions pointed to; an
- initializer calls add_symtab_fns to add them to the global chain. */
+ /* This function produces a format-independent description of
+ the segments of ABFD. Each segment is a unit of the file
+ which may be relocated independently. */
- struct sym_fns *next;
+ struct symfile_segment_data *(*sym_segments) (bfd *abfd);
- };
+ /* Finds the next struct sym_fns. They are allocated and
+ initialized in whatever module implements the functions pointed
+ to; an initializer calls add_symtab_fns to add them to the global
+ chain. */
+
+ struct sym_fns *next;
+
+};
/* The default version of sym_fns.sym_offsets for readers that don't
do anything special. */
-extern void
-default_symfile_offsets (struct objfile *objfile, struct section_addr_info *);
+extern void default_symfile_offsets (struct objfile *objfile,
+ struct section_addr_info *);
+/* The default version of sym_fns.sym_segments for readers that don't
+ do anything special. */
-extern void
-extend_psymbol_list (struct psymbol_allocation_list *, struct objfile *);
-
-/* Add any kind of symbol to a psymbol_allocation_list. */
+extern struct symfile_segment_data *default_symfile_segments (bfd *abfd);
-/* #include "demangle.h" */
+extern void extend_psymbol_list (struct psymbol_allocation_list *,
+ struct objfile *);
-extern void
-add_psymbol_to_list (char *, int, namespace_enum, enum address_class,
- struct psymbol_allocation_list *, long, CORE_ADDR,
- enum language, struct objfile *);
+/* Add any kind of symbol to a psymbol_allocation_list. */
-extern void
-add_psymbol_with_dem_name_to_list (char *, int, char *, int, namespace_enum,
- enum address_class,
- struct psymbol_allocation_list *,
- long, CORE_ADDR,
- enum language, struct objfile *);
+/* #include "demangle.h" */
+extern const
+struct partial_symbol *add_psymbol_to_list (char *, int, domain_enum,
+ enum address_class,
+ struct psymbol_allocation_list *,
+ long, CORE_ADDR,
+ enum language, struct objfile *);
extern void init_psymbol_list (struct objfile *, int);
extern void add_symtab_fns (struct sym_fns *);
-extern void init_entry_point_info (struct objfile *);
-
-extern void
-syms_from_objfile (struct objfile *, struct section_addr_info *, int, int);
+extern void syms_from_objfile (struct objfile *,
+ struct section_addr_info *,
+ struct section_offsets *, int, int, int);
extern void new_symfile_objfile (struct objfile *, int, int);
extern struct objfile *symbol_file_add (char *, int,
struct section_addr_info *, int, int);
-/* Build (allocate and populate) a section_addr_info struct from
- an existing section table. */
+extern struct objfile *symbol_file_add_from_bfd (bfd *, int,
+ struct section_addr_info *,
+ int, int);
-struct section_table;
-extern struct section_addr_info *
-build_section_addr_info_from_section_table (const struct section_table *start,
- const struct section_table *end);
+/* Create a new section_addr_info, with room for NUM_SECTIONS. */
+
+extern struct section_addr_info *alloc_section_addr_info (size_t
+ num_sections);
-/* Free all memory allocated by build_section_addr_info_from_section_table. */
+/* Return a freshly allocated copy of ADDRS. The section names, if
+ any, are also freshly allocated copies of those in ADDRS. */
+extern struct section_addr_info *(copy_section_addr_info
+ (struct section_addr_info *addrs));
-extern void
-free_section_addr_info (struct section_addr_info *);
+/* Build (allocate and populate) a section_addr_info struct from an
+ existing section table. */
+
+extern struct section_addr_info
+ *build_section_addr_info_from_section_table (const struct section_table
+ *start,
+ const struct section_table
+ *end);
+
+/* Free all memory allocated by
+ build_section_addr_info_from_section_table. */
+
+extern void free_section_addr_info (struct section_addr_info *);
extern struct partial_symtab *start_psymtab_common (struct objfile *,
struct partial_symbol **,
struct partial_symbol **);
-/* Sorting your symbols for fast lookup or alphabetical printing. */
-
-extern void sort_block_syms (struct block *);
-
-extern void sort_symtab_syms (struct symtab *);
+/* Make a copy of the string at PTR with SIZE characters in the symbol
+ obstack (and add a null character at the end in the copy). Returns
+ the address of the copy. */
-/* Make a copy of the string at PTR with SIZE characters in the symbol obstack
- (and add a null character at the end in the copy).
- Returns the address of the copy. */
+extern char *obsavestring (const char *, int, struct obstack *);
-extern char *obsavestring (char *, int, struct obstack *);
-
-/* Concatenate strings S1, S2 and S3; return the new string.
- Space is found in the symbol_obstack. */
+/* Concatenate strings S1, S2 and S3; return the new string. Space is
+ found in the OBSTACKP */
extern char *obconcat (struct obstack *obstackp, const char *, const char *,
const char *);
/* Variables */
-/* whether to auto load solibs at startup time: 0/1.
+/* If non-zero, shared library symbols will be added automatically
+ when the inferior is created, new libraries are loaded, or when
+ attaching to the inferior. This is almost always what users will
+ want to have happen; but for very large programs, the startup time
+ will be excessive, and so if this is a problem, the user can clear
+ this flag and then add the shared library symbols as needed. Note
+ that there is a potential for confusion, since if the shared
+ library symbols are not loaded, commands like "info fun" will *not*
+ report all the functions that are actually present. */
- On all platforms, 0 means "don't auto load".
+extern int auto_solib_add;
- On HP-UX, > 0 means a threshhold, in megabytes, of symbol table which will
- be auto loaded. When the cumulative size of solib symbol table exceeds
- this threshhold, solibs' symbol tables will not be loaded.
+/* For systems that support it, a threshold size in megabytes. If
+ automatically adding a new library's symbol table to those already
+ known to the debugger would cause the total shared library symbol
+ size to exceed this threshhold, then the shlib's symbols are not
+ added. The threshold is ignored if the user explicitly asks for a
+ shlib to be added, such as when using the "sharedlibrary" command. */
- On other platforms, > 0 means, "always auto load".
- */
-
-extern int auto_solib_add;
+extern int auto_solib_limit;
/* From symfile.c */
-extern CORE_ADDR entry_point_address (void);
-
extern struct partial_symtab *allocate_psymtab (char *, struct objfile *);
extern void discard_psymtab (struct partial_symtab *);
-extern void find_lowest_section (bfd *, asection *, PTR);
+extern void find_lowest_section (bfd *, asection *, void *);
extern bfd *symfile_bfd_open (char *);
+extern int get_section_index (struct objfile *, char *);
+
/* Utility functions for overlay sections: */
-extern int overlay_debugging;
+extern enum overlay_debugging_state
+{
+ ovly_off,
+ ovly_on,
+ ovly_auto
+} overlay_debugging;
extern int overlay_cache_invalid;
-/* return the "mapped" overlay section containing the PC */
+/* Return the "mapped" overlay section containing the PC. */
extern asection *find_pc_mapped_section (CORE_ADDR);
-/* return any overlay section containing the PC (even in its LMA region) */
+/* Return any overlay section containing the PC (even in its LMA
+ region). */
extern asection *find_pc_overlay (CORE_ADDR);
-/* return true if the section is an overlay */
+/* Return true if the section is an overlay. */
extern int section_is_overlay (asection *);
-/* return true if the overlay section is currently "mapped" */
+/* Return true if the overlay section is currently "mapped". */
extern int section_is_mapped (asection *);
-/* return true if pc belongs to section's VMA */
+/* Return true if pc belongs to section's VMA. */
extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, asection *);
-/* return true if pc belongs to section's LMA */
+/* Return true if pc belongs to section's LMA. */
extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, asection *);
-/* map an address from a section's LMA to its VMA */
+/* Map an address from a section's LMA to its VMA. */
extern CORE_ADDR overlay_mapped_address (CORE_ADDR, asection *);
-/* map an address from a section's VMA to its LMA */
+/* Map an address from a section's VMA to its LMA. */
extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, asection *);
-/* convert an address in an overlay section (force into VMA range) */
+/* Convert an address in an overlay section (force into VMA range). */
extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, asection *);
-/* From dwarfread.c */
+/* Load symbols from a file. */
+extern void symbol_file_add_main (char *args, int from_tty);
+
+/* Clear GDB symbol tables. */
+extern void symbol_file_clear (int from_tty);
+
+/* Default overlay update function. */
+extern void simple_overlay_update (struct obj_section *);
+
+extern bfd_byte *symfile_relocate_debug_section (bfd *abfd, asection *sectp,
+ bfd_byte * buf);
-extern void
-dwarf_build_psymtabs (struct objfile *, int, file_ptr, unsigned int,
- file_ptr, unsigned int);
+extern int symfile_map_offsets_to_segments (bfd *,
+ struct symfile_segment_data *,
+ struct section_offsets *,
+ int, const CORE_ADDR *);
+struct symfile_segment_data *get_symfile_segment_data (bfd *abfd);
+void free_symfile_segment_data (struct symfile_segment_data *data);
/* From dwarf2read.c */
-extern int dwarf2_has_info (bfd * abfd);
+extern int dwarf2_has_info (struct objfile *);
extern void dwarf2_build_psymtabs (struct objfile *, int);
+extern void dwarf2_build_frame_info (struct objfile *);
/* From mdebugread.c */
/* Hack to force structures to exist before use in parameter list. */
struct ecoff_debug_hack
- {
- struct ecoff_debug_swap *a;
- struct ecoff_debug_info *b;
- };
-extern void
-mdebug_build_psymtabs (struct objfile *,
- const struct ecoff_debug_swap *,
- struct ecoff_debug_info *);
-
-extern void
-elfmdebug_build_psymtabs (struct objfile *,
- const struct ecoff_debug_swap *, asection *);
+{
+ struct ecoff_debug_swap *a;
+ struct ecoff_debug_info *b;
+};
+
+extern void mdebug_build_psymtabs (struct objfile *,
+ const struct ecoff_debug_swap *,
+ struct ecoff_debug_info *);
+
+extern void elfmdebug_build_psymtabs (struct objfile *,
+ const struct ecoff_debug_swap *,
+ asection *);
#endif /* !defined(SYMFILE_H) */
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