1 /* Definitions for reading symbol files into GDB.
2 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996, 2000
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 #if !defined (SYMFILE_H)
25 /* This file requires that you first include "bfd.h". */
27 /* Partial symbols are stored in the psymbol_cache and pointers to them
28 are kept in a dynamically grown array that is obtained from malloc and
29 grown as necessary via realloc. Each objfile typically has two of these,
30 one for global symbols and one for static symbols. Although this adds
31 a level of indirection for storing or accessing the partial symbols,
32 it allows us to throw away duplicate psymbols and set all pointers
33 to the single saved instance. */
35 struct psymbol_allocation_list
38 /* Pointer to beginning of dynamically allocated array of pointers to
39 partial symbols. The array is dynamically expanded as necessary to
40 accommodate more pointers. */
42 struct partial_symbol
**list
;
44 /* Pointer to next available slot in which to store a pointer to a partial
47 struct partial_symbol
**next
;
49 /* Number of allocated pointer slots in current dynamic array (not the
50 number of bytes of storage). The "next" pointer will always point
51 somewhere between list[0] and list[size], and when at list[size] the
52 array will be expanded on the next attempt to store a pointer. */
57 /* Define an array of addresses to accommodate non-contiguous dynamic
58 loading of modules. This is for use when entering commands, so we
59 can keep track of the section names until we read the file and
60 can map them to bfd sections. This structure is also used by
61 solib.c to communicate the section addresses in shared objects to
62 symbol_file_add (). */
64 #define MAX_SECTIONS 64
65 struct section_addr_info
67 /* Sections whose names are file format dependent. */
73 } other
[MAX_SECTIONS
];
76 /* Structure to keep track of symbol reading functions for various
82 /* BFD flavour that we handle, or (as a special kludge, see xcoffread.c,
83 (enum bfd_flavour)-1 for xcoff). */
85 enum bfd_flavour sym_flavour
;
87 /* Initializes anything that is global to the entire symbol table. It is
88 called during symbol_file_add, when we begin debugging an entirely new
91 void (*sym_new_init
) (struct objfile
*);
93 /* Reads any initial information from a symbol file, and initializes the
94 struct sym_fns SF in preparation for sym_read(). It is called every
95 time we read a symbol file for any reason. */
97 void (*sym_init
) (struct objfile
*);
99 /* sym_read (objfile, mainline)
100 Reads a symbol file into a psymtab (or possibly a symtab).
101 OBJFILE is the objfile struct for the file we are reading.
102 MAINLINE is 1 if this is the
103 main symbol table being read, and 0 if a secondary
104 symbol file (e.g. shared library or dynamically loaded file)
107 void (*sym_read
) (struct objfile
*, int);
109 /* Called when we are finished with an objfile. Should do all cleanup
110 that is specific to the object file format for the particular objfile. */
112 void (*sym_finish
) (struct objfile
*);
114 /* This function produces a file-dependent section_offsets structure,
115 allocated in the objfile's storage, and based on the parameter.
116 The parameter is currently a CORE_ADDR (FIXME!) for backward compatibility
117 with the higher levels of GDB. It should probably be changed to
118 a string, where NULL means the default, and others are parsed in a file
121 void (*sym_offsets
) (struct objfile
*, struct section_addr_info
*);
123 /* Finds the next struct sym_fns. They are allocated and initialized
124 in whatever module implements the functions pointed to; an
125 initializer calls add_symtab_fns to add them to the global chain. */
127 struct sym_fns
*next
;
131 /* The default version of sym_fns.sym_offsets for readers that don't
132 do anything special. */
135 default_symfile_offsets (struct objfile
*objfile
, struct section_addr_info
*);
139 extend_psymbol_list (struct psymbol_allocation_list
*, struct objfile
*);
141 /* Add any kind of symbol to a psymbol_allocation_list. */
143 /* #include "demangle.h" */
146 add_psymbol_to_list (char *, int, namespace_enum
, enum address_class
,
147 struct psymbol_allocation_list
*, long, CORE_ADDR
,
148 enum language
, struct objfile
*);
151 add_psymbol_with_dem_name_to_list (char *, int, char *, int, namespace_enum
,
153 struct psymbol_allocation_list
*,
155 enum language
, struct objfile
*);
158 extern void init_psymbol_list (struct objfile
*, int);
160 extern void sort_pst_symbols (struct partial_symtab
*);
162 extern struct symtab
*allocate_symtab (char *, struct objfile
*);
164 extern int free_named_symtabs (char *);
166 extern void fill_in_vptr_fieldno (struct type
*);
168 extern void add_symtab_fns (struct sym_fns
*);
170 extern void init_entry_point_info (struct objfile
*);
173 syms_from_objfile (struct objfile
*, struct section_addr_info
*, int, int);
175 extern void new_symfile_objfile (struct objfile
*, int, int);
177 extern struct objfile
*symbol_file_add (char *, int,
178 struct section_addr_info
*, int, int);
180 /* Build (allocate and populate) a section_addr_info struct from
181 an existing section table. */
183 struct section_table
;
184 extern struct section_addr_info
*
185 build_section_addr_info_from_section_table (const struct section_table
*start
,
186 const struct section_table
*end
);
188 /* Free all memory allocated by build_section_addr_info_from_section_table. */
191 free_section_addr_info (struct section_addr_info
*);
194 extern struct partial_symtab
*start_psymtab_common (struct objfile
*,
195 struct section_offsets
*,
197 struct partial_symbol
**,
198 struct partial_symbol
**);
200 /* Sorting your symbols for fast lookup or alphabetical printing. */
202 extern void sort_block_syms (struct block
*);
204 extern void sort_symtab_syms (struct symtab
*);
206 /* Make a copy of the string at PTR with SIZE characters in the symbol obstack
207 (and add a null character at the end in the copy).
208 Returns the address of the copy. */
210 extern char *obsavestring (char *, int, struct obstack
*);
212 /* Concatenate strings S1, S2 and S3; return the new string.
213 Space is found in the symbol_obstack. */
215 extern char *obconcat (struct obstack
*obstackp
, const char *, const char *,
220 /* whether to auto load solibs at startup time: 0/1.
222 On all platforms, 0 means "don't auto load".
224 On HP-UX, > 0 means a threshhold, in megabytes, of symbol table which will
225 be auto loaded. When the cumulative size of solib symbol table exceeds
226 this threshhold, solibs' symbol tables will not be loaded.
228 On other platforms, > 0 means, "always auto load".
231 extern int auto_solib_add
;
235 extern CORE_ADDR
entry_point_address (void);
237 extern struct partial_symtab
*allocate_psymtab (char *, struct objfile
*);
239 extern void discard_psymtab (struct partial_symtab
*);
241 extern void find_lowest_section (bfd
*, asection
*, PTR
);
243 extern bfd
*symfile_bfd_open (char *);
245 /* Utility functions for overlay sections: */
246 extern int overlay_debugging
;
247 extern int overlay_cache_invalid
;
249 /* return the "mapped" overlay section containing the PC */
250 extern asection
*find_pc_mapped_section (CORE_ADDR
);
252 /* return any overlay section containing the PC (even in its LMA region) */
253 extern asection
*find_pc_overlay (CORE_ADDR
);
255 /* return true if the section is an overlay */
256 extern int section_is_overlay (asection
*);
258 /* return true if the overlay section is currently "mapped" */
259 extern int section_is_mapped (asection
*);
261 /* return true if pc belongs to section's VMA */
262 extern CORE_ADDR
pc_in_mapped_range (CORE_ADDR
, asection
*);
264 /* return true if pc belongs to section's LMA */
265 extern CORE_ADDR
pc_in_unmapped_range (CORE_ADDR
, asection
*);
267 /* map an address from a section's LMA to its VMA */
268 extern CORE_ADDR
overlay_mapped_address (CORE_ADDR
, asection
*);
270 /* map an address from a section's VMA to its LMA */
271 extern CORE_ADDR
overlay_unmapped_address (CORE_ADDR
, asection
*);
273 /* convert an address in an overlay section (force into VMA range) */
274 extern CORE_ADDR
symbol_overlayed_address (CORE_ADDR
, asection
*);
276 /* From dwarfread.c */
279 dwarf_build_psymtabs (struct objfile
*, int, file_ptr
, unsigned int,
280 file_ptr
, unsigned int);
282 /* From dwarf2read.c */
284 extern int dwarf2_has_info (bfd
* abfd
);
286 extern void dwarf2_build_psymtabs (struct objfile
*, int);
288 /* From mdebugread.c */
290 /* Hack to force structures to exist before use in parameter list. */
291 struct ecoff_debug_hack
293 struct ecoff_debug_swap
*a
;
294 struct ecoff_debug_info
*b
;
297 mdebug_build_psymtabs (struct objfile
*,
298 const struct ecoff_debug_swap
*,
299 struct ecoff_debug_info
*);
302 elfmdebug_build_psymtabs (struct objfile
*,
303 const struct ecoff_debug_swap
*, asection
*);
305 #endif /* !defined(SYMFILE_H) */
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