Commit | Line | Data |
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c906108c | 1 | /* Symbol table definitions for GDB. |
1bac305b | 2 | |
6aba47ca | 3 | Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, |
9b254dd1 | 4 | 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008 |
6aba47ca | 5 | Free Software Foundation, Inc. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #if !defined (SYMTAB_H) | |
23 | #define SYMTAB_H 1 | |
24 | ||
5f8a3188 | 25 | /* Opaque declarations. */ |
da3331ec AC |
26 | struct ui_file; |
27 | struct frame_info; | |
28 | struct symbol; | |
5f8a3188 | 29 | struct obstack; |
6a2f5abf | 30 | struct objfile; |
fe898f56 DC |
31 | struct block; |
32 | struct blockvector; | |
4c2df51b DJ |
33 | struct axs_value; |
34 | struct agent_expr; | |
c906108c | 35 | |
a7f19c79 MC |
36 | /* Some of the structures in this file are space critical. |
37 | The space-critical structures are: | |
38 | ||
39 | struct general_symbol_info | |
40 | struct symbol | |
41 | struct partial_symbol | |
42 | ||
5bccb4d1 | 43 | These structures are laid out to encourage good packing. |
a7f19c79 MC |
44 | They use ENUM_BITFIELD and short int fields, and they order the |
45 | structure members so that fields less than a word are next | |
46 | to each other so they can be packed together. */ | |
47 | ||
48 | /* Rearranged: used ENUM_BITFIELD and rearranged field order in | |
49 | all the space critical structures (plus struct minimal_symbol). | |
50 | Memory usage dropped from 99360768 bytes to 90001408 bytes. | |
51 | I measured this with before-and-after tests of | |
52 | "HEAD-old-gdb -readnow HEAD-old-gdb" and | |
53 | "HEAD-new-gdb -readnow HEAD-old-gdb" on native i686-pc-linux-gnu, | |
54 | red hat linux 8, with LD_LIBRARY_PATH=/usr/lib/debug, | |
55 | typing "maint space 1" at the first command prompt. | |
56 | ||
57 | Here is another measurement (from andrew c): | |
58 | # no /usr/lib/debug, just plain glibc, like a normal user | |
59 | gdb HEAD-old-gdb | |
60 | (gdb) break internal_error | |
61 | (gdb) run | |
62 | (gdb) maint internal-error | |
63 | (gdb) backtrace | |
64 | (gdb) maint space 1 | |
65 | ||
66 | gdb gdb_6_0_branch 2003-08-19 space used: 8896512 | |
67 | gdb HEAD 2003-08-19 space used: 8904704 | |
68 | gdb HEAD 2003-08-21 space used: 8396800 (+symtab.h) | |
69 | gdb HEAD 2003-08-21 space used: 8265728 (+gdbtypes.h) | |
70 | ||
71 | The third line shows the savings from the optimizations in symtab.h. | |
72 | The fourth line shows the savings from the optimizations in | |
73 | gdbtypes.h. Both optimizations are in gdb HEAD now. | |
74 | ||
75 | --chastain 2003-08-21 */ | |
76 | ||
77 | ||
78 | ||
c906108c SS |
79 | /* Define a structure for the information that is common to all symbol types, |
80 | including minimal symbols, partial symbols, and full symbols. In a | |
81 | multilanguage environment, some language specific information may need to | |
a7f19c79 | 82 | be recorded along with each symbol. */ |
c906108c | 83 | |
a7f19c79 | 84 | /* This structure is space critical. See space comments at the top. */ |
c906108c SS |
85 | |
86 | struct general_symbol_info | |
17c5ed2c | 87 | { |
22abf04a | 88 | /* Name of the symbol. This is a required field. Storage for the |
4a146b47 EZ |
89 | name is allocated on the objfile_obstack for the associated |
90 | objfile. For languages like C++ that make a distinction between | |
91 | the mangled name and demangled name, this is the mangled | |
92 | name. */ | |
c906108c | 93 | |
17c5ed2c | 94 | char *name; |
c906108c | 95 | |
17c5ed2c DC |
96 | /* Value of the symbol. Which member of this union to use, and what |
97 | it means, depends on what kind of symbol this is and its | |
98 | SYMBOL_CLASS. See comments there for more details. All of these | |
99 | are in host byte order (though what they point to might be in | |
100 | target byte order, e.g. LOC_CONST_BYTES). */ | |
c906108c | 101 | |
17c5ed2c DC |
102 | union |
103 | { | |
104 | /* The fact that this is a long not a LONGEST mainly limits the | |
105 | range of a LOC_CONST. Since LOC_CONST_BYTES exists, I'm not | |
106 | sure that is a big deal. */ | |
107 | long ivalue; | |
c906108c | 108 | |
17c5ed2c | 109 | struct block *block; |
c906108c | 110 | |
4e38b386 | 111 | gdb_byte *bytes; |
c906108c | 112 | |
17c5ed2c | 113 | CORE_ADDR address; |
c906108c | 114 | |
17c5ed2c | 115 | /* for opaque typedef struct chain */ |
c906108c | 116 | |
17c5ed2c DC |
117 | struct symbol *chain; |
118 | } | |
119 | value; | |
c906108c | 120 | |
17c5ed2c DC |
121 | /* Since one and only one language can apply, wrap the language specific |
122 | information inside a union. */ | |
c906108c | 123 | |
17c5ed2c DC |
124 | union |
125 | { | |
22abf04a | 126 | struct cplus_specific |
17c5ed2c | 127 | { |
22abf04a | 128 | /* This is in fact used for C++, Java, and Objective C. */ |
17c5ed2c DC |
129 | char *demangled_name; |
130 | } | |
131 | cplus_specific; | |
17c5ed2c DC |
132 | } |
133 | language_specific; | |
c5aa993b | 134 | |
17c5ed2c DC |
135 | /* Record the source code language that applies to this symbol. |
136 | This is used to select one of the fields from the language specific | |
137 | union above. */ | |
c5aa993b | 138 | |
87193939 | 139 | ENUM_BITFIELD(language) language : 8; |
c5aa993b | 140 | |
17c5ed2c DC |
141 | /* Which section is this symbol in? This is an index into |
142 | section_offsets for this objfile. Negative means that the symbol | |
143 | does not get relocated relative to a section. | |
144 | Disclaimer: currently this is just used for xcoff, so don't | |
145 | expect all symbol-reading code to set it correctly (the ELF code | |
146 | also tries to set it correctly). */ | |
c5aa993b | 147 | |
17c5ed2c | 148 | short section; |
c5aa993b | 149 | |
714835d5 | 150 | /* The section associated with this symbol. */ |
c5aa993b | 151 | |
714835d5 | 152 | struct obj_section *obj_section; |
17c5ed2c | 153 | }; |
c906108c | 154 | |
714835d5 | 155 | extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *); |
c906108c | 156 | |
88cda038 EZ |
157 | /* Note that all the following SYMBOL_* macros are used with the |
158 | SYMBOL argument being either a partial symbol, a minimal symbol or | |
159 | a full symbol. All three types have a ginfo field. In particular | |
d6350901 DJ |
160 | the SYMBOL_INIT_LANGUAGE_SPECIFIC, SYMBOL_DEMANGLED_NAME, etc. |
161 | macros cannot be entirely substituted by | |
88cda038 EZ |
162 | functions, unless the callers are changed to pass in the ginfo |
163 | field only, instead of the SYMBOL parameter. */ | |
164 | ||
c906108c SS |
165 | #define SYMBOL_VALUE(symbol) (symbol)->ginfo.value.ivalue |
166 | #define SYMBOL_VALUE_ADDRESS(symbol) (symbol)->ginfo.value.address | |
167 | #define SYMBOL_VALUE_BYTES(symbol) (symbol)->ginfo.value.bytes | |
168 | #define SYMBOL_BLOCK_VALUE(symbol) (symbol)->ginfo.value.block | |
169 | #define SYMBOL_VALUE_CHAIN(symbol) (symbol)->ginfo.value.chain | |
170 | #define SYMBOL_LANGUAGE(symbol) (symbol)->ginfo.language | |
171 | #define SYMBOL_SECTION(symbol) (symbol)->ginfo.section | |
714835d5 | 172 | #define SYMBOL_OBJ_SECTION(symbol) (symbol)->ginfo.obj_section |
c906108c SS |
173 | |
174 | #define SYMBOL_CPLUS_DEMANGLED_NAME(symbol) \ | |
175 | (symbol)->ginfo.language_specific.cplus_specific.demangled_name | |
176 | ||
89aad1f9 | 177 | /* Initializes the language dependent portion of a symbol |
c906108c | 178 | depending upon the language for the symbol. */ |
89aad1f9 EZ |
179 | #define SYMBOL_INIT_LANGUAGE_SPECIFIC(symbol,language) \ |
180 | (symbol_init_language_specific (&(symbol)->ginfo, (language))) | |
181 | extern void symbol_init_language_specific (struct general_symbol_info *symbol, | |
182 | enum language language); | |
c906108c | 183 | |
3567439c DJ |
184 | /* Set just the linkage name of a symbol; do not try to demangle |
185 | it. Used for constructs which do not have a mangled name, | |
186 | e.g. struct tags. Unlike SYMBOL_SET_NAMES, linkage_name must | |
187 | be terminated and already on the objfile's obstack. */ | |
188 | #define SYMBOL_SET_LINKAGE_NAME(symbol,linkage_name) \ | |
189 | (symbol)->ginfo.name = (linkage_name) | |
190 | ||
191 | /* Set the linkage and natural names of a symbol, by demangling | |
192 | the linkage name. */ | |
980cae7a DC |
193 | #define SYMBOL_SET_NAMES(symbol,linkage_name,len,objfile) \ |
194 | symbol_set_names (&(symbol)->ginfo, linkage_name, len, objfile) | |
2de7ced7 | 195 | extern void symbol_set_names (struct general_symbol_info *symbol, |
980cae7a | 196 | const char *linkage_name, int len, |
2de7ced7 DJ |
197 | struct objfile *objfile); |
198 | ||
22abf04a DC |
199 | /* Now come lots of name accessor macros. Short version as to when to |
200 | use which: Use SYMBOL_NATURAL_NAME to refer to the name of the | |
201 | symbol in the original source code. Use SYMBOL_LINKAGE_NAME if you | |
202 | want to know what the linker thinks the symbol's name is. Use | |
203 | SYMBOL_PRINT_NAME for output. Use SYMBOL_DEMANGLED_NAME if you | |
204 | specifically need to know whether SYMBOL_NATURAL_NAME and | |
3567439c | 205 | SYMBOL_LINKAGE_NAME are different. */ |
22abf04a DC |
206 | |
207 | /* Return SYMBOL's "natural" name, i.e. the name that it was called in | |
208 | the original source code. In languages like C++ where symbols may | |
209 | be mangled for ease of manipulation by the linker, this is the | |
210 | demangled name. */ | |
211 | ||
212 | #define SYMBOL_NATURAL_NAME(symbol) \ | |
213 | (symbol_natural_name (&(symbol)->ginfo)) | |
214 | extern char *symbol_natural_name (const struct general_symbol_info *symbol); | |
215 | ||
216 | /* Return SYMBOL's name from the point of view of the linker. In | |
217 | languages like C++ where symbols may be mangled for ease of | |
218 | manipulation by the linker, this is the mangled name; otherwise, | |
3567439c | 219 | it's the same as SYMBOL_NATURAL_NAME. */ |
22abf04a DC |
220 | |
221 | #define SYMBOL_LINKAGE_NAME(symbol) (symbol)->ginfo.name | |
222 | ||
9cc0d196 EZ |
223 | /* Return the demangled name for a symbol based on the language for |
224 | that symbol. If no demangled name exists, return NULL. */ | |
225 | #define SYMBOL_DEMANGLED_NAME(symbol) \ | |
226 | (symbol_demangled_name (&(symbol)->ginfo)) | |
df8a16a1 | 227 | extern char *symbol_demangled_name (const struct general_symbol_info *symbol); |
c906108c | 228 | |
de5ad195 DC |
229 | /* Macro that returns a version of the name of a symbol that is |
230 | suitable for output. In C++ this is the "demangled" form of the | |
231 | name if demangle is on and the "mangled" form of the name if | |
232 | demangle is off. In other languages this is just the symbol name. | |
233 | The result should never be NULL. Don't use this for internal | |
234 | purposes (e.g. storing in a hashtable): it's only suitable for | |
235 | output. */ | |
236 | ||
237 | #define SYMBOL_PRINT_NAME(symbol) \ | |
22abf04a | 238 | (demangle ? SYMBOL_NATURAL_NAME (symbol) : SYMBOL_LINKAGE_NAME (symbol)) |
c906108c | 239 | |
c906108c SS |
240 | /* Macro that tests a symbol for a match against a specified name string. |
241 | First test the unencoded name, then looks for and test a C++ encoded | |
242 | name if it exists. Note that whitespace is ignored while attempting to | |
243 | match a C++ encoded name, so that "foo::bar(int,long)" is the same as | |
244 | "foo :: bar (int, long)". | |
245 | Evaluates to zero if the match fails, or nonzero if it succeeds. */ | |
246 | ||
8e437497 DC |
247 | /* Macro that tests a symbol for a match against a specified name |
248 | string. It tests against SYMBOL_NATURAL_NAME, and it ignores | |
249 | whitespace and trailing parentheses. (See strcmp_iw for details | |
250 | about its behavior.) */ | |
251 | ||
252 | #define SYMBOL_MATCHES_NATURAL_NAME(symbol, name) \ | |
253 | (strcmp_iw (SYMBOL_NATURAL_NAME (symbol), (name)) == 0) | |
254 | ||
4725b721 PH |
255 | /* Macro that returns the name to be used when sorting and searching symbols. |
256 | In C++, Chill, and Java, we search for the demangled form of a name, | |
257 | and so sort symbols accordingly. In Ada, however, we search by mangled | |
258 | name. If there is no distinct demangled name, then SYMBOL_SEARCH_NAME | |
259 | returns the same value (same pointer) as SYMBOL_LINKAGE_NAME. */ | |
260 | #define SYMBOL_SEARCH_NAME(symbol) \ | |
261 | (symbol_search_name (&(symbol)->ginfo)) | |
262 | extern char *symbol_search_name (const struct general_symbol_info *); | |
263 | ||
264 | /* Analogous to SYMBOL_MATCHES_NATURAL_NAME, but uses the search | |
265 | name. */ | |
266 | #define SYMBOL_MATCHES_SEARCH_NAME(symbol, name) \ | |
267 | (strcmp_iw (SYMBOL_SEARCH_NAME (symbol), (name)) == 0) | |
268 | ||
87193939 MC |
269 | /* Classification types for a minimal symbol. These should be taken as |
270 | "advisory only", since if gdb can't easily figure out a | |
271 | classification it simply selects mst_unknown. It may also have to | |
272 | guess when it can't figure out which is a better match between two | |
273 | types (mst_data versus mst_bss) for example. Since the minimal | |
274 | symbol info is sometimes derived from the BFD library's view of a | |
275 | file, we need to live with what information bfd supplies. */ | |
276 | ||
277 | enum minimal_symbol_type | |
278 | { | |
279 | mst_unknown = 0, /* Unknown type, the default */ | |
280 | mst_text, /* Generally executable instructions */ | |
281 | mst_data, /* Generally initialized data */ | |
282 | mst_bss, /* Generally uninitialized data */ | |
283 | mst_abs, /* Generally absolute (nonrelocatable) */ | |
284 | /* GDB uses mst_solib_trampoline for the start address of a shared | |
285 | library trampoline entry. Breakpoints for shared library functions | |
286 | are put there if the shared library is not yet loaded. | |
287 | After the shared library is loaded, lookup_minimal_symbol will | |
288 | prefer the minimal symbol from the shared library (usually | |
289 | a mst_text symbol) over the mst_solib_trampoline symbol, and the | |
290 | breakpoints will be moved to their true address in the shared | |
291 | library via breakpoint_re_set. */ | |
292 | mst_solib_trampoline, /* Shared library trampoline code */ | |
293 | /* For the mst_file* types, the names are only guaranteed to be unique | |
294 | within a given .o file. */ | |
295 | mst_file_text, /* Static version of mst_text */ | |
296 | mst_file_data, /* Static version of mst_data */ | |
297 | mst_file_bss /* Static version of mst_bss */ | |
298 | }; | |
299 | ||
c906108c SS |
300 | /* Define a simple structure used to hold some very basic information about |
301 | all defined global symbols (text, data, bss, abs, etc). The only required | |
302 | information is the general_symbol_info. | |
303 | ||
304 | In many cases, even if a file was compiled with no special options for | |
305 | debugging at all, as long as was not stripped it will contain sufficient | |
306 | information to build a useful minimal symbol table using this structure. | |
307 | Even when a file contains enough debugging information to build a full | |
308 | symbol table, these minimal symbols are still useful for quickly mapping | |
309 | between names and addresses, and vice versa. They are also sometimes | |
310 | used to figure out what full symbol table entries need to be read in. */ | |
311 | ||
312 | struct minimal_symbol | |
17c5ed2c | 313 | { |
c906108c | 314 | |
17c5ed2c | 315 | /* The general symbol info required for all types of symbols. |
c906108c | 316 | |
17c5ed2c DC |
317 | The SYMBOL_VALUE_ADDRESS contains the address that this symbol |
318 | corresponds to. */ | |
c906108c | 319 | |
17c5ed2c | 320 | struct general_symbol_info ginfo; |
c906108c | 321 | |
4a146b47 EZ |
322 | /* The info field is available for caching machine-specific |
323 | information so it doesn't have to rederive the info constantly | |
324 | (over a serial line). It is initialized to zero and stays that | |
325 | way until target-dependent code sets it. Storage for any data | |
326 | pointed to by this field should be allocated on the | |
327 | objfile_obstack for the associated objfile. The type would be | |
328 | "void *" except for reasons of compatibility with older | |
17c5ed2c | 329 | compilers. This field is optional. |
c906108c | 330 | |
17c5ed2c DC |
331 | Currently, the AMD 29000 tdep.c uses it to remember things it has decoded |
332 | from the instructions in the function header, and the MIPS-16 code uses | |
333 | it to identify 16-bit procedures. */ | |
c906108c | 334 | |
17c5ed2c | 335 | char *info; |
c906108c | 336 | |
f594e5e9 MC |
337 | /* Size of this symbol. end_psymtab in dbxread.c uses this |
338 | information to calculate the end of the partial symtab based on the | |
339 | address of the last symbol plus the size of the last symbol. */ | |
340 | ||
341 | unsigned long size; | |
342 | ||
17c5ed2c DC |
343 | /* Which source file is this symbol in? Only relevant for mst_file_*. */ |
344 | char *filename; | |
c906108c | 345 | |
87193939 | 346 | /* Classification type for this minimal symbol. */ |
17c5ed2c | 347 | |
87193939 | 348 | ENUM_BITFIELD(minimal_symbol_type) type : 8; |
17c5ed2c DC |
349 | |
350 | /* Minimal symbols with the same hash key are kept on a linked | |
351 | list. This is the link. */ | |
352 | ||
353 | struct minimal_symbol *hash_next; | |
354 | ||
355 | /* Minimal symbols are stored in two different hash tables. This is | |
356 | the `next' pointer for the demangled hash table. */ | |
357 | ||
358 | struct minimal_symbol *demangled_hash_next; | |
359 | }; | |
c906108c SS |
360 | |
361 | #define MSYMBOL_INFO(msymbol) (msymbol)->info | |
f594e5e9 | 362 | #define MSYMBOL_SIZE(msymbol) (msymbol)->size |
c906108c | 363 | #define MSYMBOL_TYPE(msymbol) (msymbol)->type |
c906108c | 364 | |
c906108c | 365 | \f |
c5aa993b | 366 | |
c906108c SS |
367 | /* Represent one symbol name; a variable, constant, function or typedef. */ |
368 | ||
176620f1 EZ |
369 | /* Different name domains for symbols. Looking up a symbol specifies a |
370 | domain and ignores symbol definitions in other name domains. */ | |
c906108c | 371 | |
87193939 | 372 | typedef enum domain_enum_tag |
17c5ed2c | 373 | { |
176620f1 | 374 | /* UNDEF_DOMAIN is used when a domain has not been discovered or |
17c5ed2c DC |
375 | none of the following apply. This usually indicates an error either |
376 | in the symbol information or in gdb's handling of symbols. */ | |
c906108c | 377 | |
176620f1 | 378 | UNDEF_DOMAIN, |
c906108c | 379 | |
176620f1 | 380 | /* VAR_DOMAIN is the usual domain. In C, this contains variables, |
17c5ed2c | 381 | function names, typedef names and enum type values. */ |
c906108c | 382 | |
176620f1 | 383 | VAR_DOMAIN, |
c906108c | 384 | |
176620f1 | 385 | /* STRUCT_DOMAIN is used in C to hold struct, union and enum type names. |
17c5ed2c | 386 | Thus, if `struct foo' is used in a C program, it produces a symbol named |
176620f1 | 387 | `foo' in the STRUCT_DOMAIN. */ |
c906108c | 388 | |
176620f1 | 389 | STRUCT_DOMAIN, |
c906108c | 390 | |
176620f1 | 391 | /* LABEL_DOMAIN may be used for names of labels (for gotos); |
17c5ed2c | 392 | currently it is not used and labels are not recorded at all. */ |
c906108c | 393 | |
176620f1 | 394 | LABEL_DOMAIN, |
c906108c | 395 | |
176620f1 | 396 | /* Searching domains. These overlap with VAR_DOMAIN, providing |
17c5ed2c | 397 | some granularity with the search_symbols function. */ |
c906108c | 398 | |
176620f1 EZ |
399 | /* Everything in VAR_DOMAIN minus FUNCTIONS_-, TYPES_-, and |
400 | METHODS_DOMAIN */ | |
401 | VARIABLES_DOMAIN, | |
c906108c | 402 | |
17c5ed2c | 403 | /* All functions -- for some reason not methods, though. */ |
176620f1 | 404 | FUNCTIONS_DOMAIN, |
c906108c | 405 | |
17c5ed2c | 406 | /* All defined types */ |
176620f1 | 407 | TYPES_DOMAIN, |
c906108c | 408 | |
17c5ed2c | 409 | /* All class methods -- why is this separated out? */ |
176620f1 | 410 | METHODS_DOMAIN |
17c5ed2c | 411 | } |
176620f1 | 412 | domain_enum; |
c906108c SS |
413 | |
414 | /* An address-class says where to find the value of a symbol. */ | |
415 | ||
416 | enum address_class | |
17c5ed2c DC |
417 | { |
418 | /* Not used; catches errors */ | |
c5aa993b | 419 | |
17c5ed2c | 420 | LOC_UNDEF, |
c906108c | 421 | |
17c5ed2c | 422 | /* Value is constant int SYMBOL_VALUE, host byteorder */ |
c906108c | 423 | |
17c5ed2c | 424 | LOC_CONST, |
c906108c | 425 | |
17c5ed2c | 426 | /* Value is at fixed address SYMBOL_VALUE_ADDRESS */ |
c906108c | 427 | |
17c5ed2c | 428 | LOC_STATIC, |
c906108c | 429 | |
2a2d4dc3 AS |
430 | /* Value is in register. SYMBOL_VALUE is the register number. |
431 | ||
432 | For some symbol formats (stabs, for some compilers at least), | |
433 | the compiler generates two symbols, an argument and a register. | |
434 | In some cases we combine them to a single LOC_REGISTER in symbol | |
435 | reading, but currently not for all cases (e.g. it's passed on the | |
436 | stack and then loaded into a register). */ | |
c906108c | 437 | |
17c5ed2c | 438 | LOC_REGISTER, |
c906108c | 439 | |
17c5ed2c | 440 | /* It's an argument; the value is at SYMBOL_VALUE offset in arglist. */ |
c906108c | 441 | |
17c5ed2c | 442 | LOC_ARG, |
c906108c | 443 | |
17c5ed2c | 444 | /* Value address is at SYMBOL_VALUE offset in arglist. */ |
c906108c | 445 | |
17c5ed2c | 446 | LOC_REF_ARG, |
c906108c | 447 | |
2a2d4dc3 | 448 | /* Value is in specified register. Just like LOC_REGISTER except the |
17c5ed2c DC |
449 | register holds the address of the argument instead of the argument |
450 | itself. This is currently used for the passing of structs and unions | |
451 | on sparc and hppa. It is also used for call by reference where the | |
452 | address is in a register, at least by mipsread.c. */ | |
c906108c | 453 | |
17c5ed2c | 454 | LOC_REGPARM_ADDR, |
c906108c | 455 | |
17c5ed2c | 456 | /* Value is a local variable at SYMBOL_VALUE offset in stack frame. */ |
c906108c | 457 | |
17c5ed2c | 458 | LOC_LOCAL, |
c906108c | 459 | |
176620f1 EZ |
460 | /* Value not used; definition in SYMBOL_TYPE. Symbols in the domain |
461 | STRUCT_DOMAIN all have this class. */ | |
c906108c | 462 | |
17c5ed2c | 463 | LOC_TYPEDEF, |
c906108c | 464 | |
17c5ed2c | 465 | /* Value is address SYMBOL_VALUE_ADDRESS in the code */ |
c906108c | 466 | |
17c5ed2c | 467 | LOC_LABEL, |
c906108c | 468 | |
17c5ed2c DC |
469 | /* In a symbol table, value is SYMBOL_BLOCK_VALUE of a `struct block'. |
470 | In a partial symbol table, SYMBOL_VALUE_ADDRESS is the start address | |
471 | of the block. Function names have this class. */ | |
c906108c | 472 | |
17c5ed2c | 473 | LOC_BLOCK, |
c906108c | 474 | |
17c5ed2c DC |
475 | /* Value is a constant byte-sequence pointed to by SYMBOL_VALUE_BYTES, in |
476 | target byte order. */ | |
c906108c | 477 | |
17c5ed2c | 478 | LOC_CONST_BYTES, |
c906108c | 479 | |
17c5ed2c DC |
480 | /* Value is at fixed address, but the address of the variable has |
481 | to be determined from the minimal symbol table whenever the | |
482 | variable is referenced. | |
483 | This happens if debugging information for a global symbol is | |
484 | emitted and the corresponding minimal symbol is defined | |
485 | in another object file or runtime common storage. | |
486 | The linker might even remove the minimal symbol if the global | |
487 | symbol is never referenced, in which case the symbol remains | |
488 | unresolved. */ | |
c906108c | 489 | |
17c5ed2c | 490 | LOC_UNRESOLVED, |
c906108c | 491 | |
17c5ed2c DC |
492 | /* The variable does not actually exist in the program. |
493 | The value is ignored. */ | |
c906108c | 494 | |
17c5ed2c | 495 | LOC_OPTIMIZED_OUT, |
c906108c | 496 | |
4c2df51b | 497 | /* The variable's address is computed by a set of location |
a849c9ab | 498 | functions (see "struct symbol_ops" below). */ |
4c2df51b | 499 | LOC_COMPUTED, |
4c2df51b DJ |
500 | }; |
501 | ||
a67af2b9 AC |
502 | /* The methods needed to implement a symbol class. These methods can |
503 | use the symbol's .aux_value for additional per-symbol information. | |
504 | ||
505 | At present this is only used to implement location expressions. */ | |
506 | ||
507 | struct symbol_ops | |
4c2df51b DJ |
508 | { |
509 | ||
510 | /* Return the value of the variable SYMBOL, relative to the stack | |
511 | frame FRAME. If the variable has been optimized out, return | |
512 | zero. | |
513 | ||
514 | Iff `read_needs_frame (SYMBOL)' is zero, then FRAME may be zero. */ | |
515 | ||
516 | struct value *(*read_variable) (struct symbol * symbol, | |
517 | struct frame_info * frame); | |
518 | ||
519 | /* Return non-zero if we need a frame to find the value of the SYMBOL. */ | |
520 | int (*read_needs_frame) (struct symbol * symbol); | |
521 | ||
522 | /* Write to STREAM a natural-language description of the location of | |
523 | SYMBOL. */ | |
524 | int (*describe_location) (struct symbol * symbol, struct ui_file * stream); | |
525 | ||
526 | /* Tracepoint support. Append bytecodes to the tracepoint agent | |
527 | expression AX that push the address of the object SYMBOL. Set | |
528 | VALUE appropriately. Note --- for objects in registers, this | |
529 | needn't emit any code; as long as it sets VALUE properly, then | |
530 | the caller will generate the right code in the process of | |
531 | treating this as an lvalue or rvalue. */ | |
532 | ||
533 | void (*tracepoint_var_ref) (struct symbol * symbol, struct agent_expr * ax, | |
534 | struct axs_value * value); | |
17c5ed2c | 535 | }; |
c906108c | 536 | |
a7f19c79 MC |
537 | /* This structure is space critical. See space comments at the top. */ |
538 | ||
c906108c | 539 | struct symbol |
17c5ed2c | 540 | { |
c906108c | 541 | |
17c5ed2c | 542 | /* The general symbol info required for all types of symbols. */ |
c906108c | 543 | |
17c5ed2c | 544 | struct general_symbol_info ginfo; |
c906108c | 545 | |
17c5ed2c | 546 | /* Data type of value */ |
c906108c | 547 | |
17c5ed2c | 548 | struct type *type; |
c906108c | 549 | |
cb1df416 DJ |
550 | /* The symbol table containing this symbol. This is the file |
551 | associated with LINE. */ | |
552 | struct symtab *symtab; | |
553 | ||
176620f1 | 554 | /* Domain code. */ |
c906108c | 555 | |
87193939 | 556 | ENUM_BITFIELD(domain_enum_tag) domain : 6; |
c906108c | 557 | |
17c5ed2c | 558 | /* Address class */ |
a67af2b9 AC |
559 | /* NOTE: cagney/2003-11-02: The fields "aclass" and "ops" contain |
560 | overlapping information. By creating a per-aclass ops vector, or | |
561 | using the aclass as an index into an ops table, the aclass and | |
562 | ops fields can be merged. The latter, for instance, would shave | |
563 | 32-bits from each symbol (relative to a symbol lookup, any table | |
564 | index overhead would be in the noise). */ | |
c906108c | 565 | |
87193939 | 566 | ENUM_BITFIELD(address_class) aclass : 6; |
c906108c | 567 | |
2a2d4dc3 AS |
568 | /* Whether this is an argument. */ |
569 | ||
570 | unsigned is_argument : 1; | |
571 | ||
17c5ed2c DC |
572 | /* Line number of definition. FIXME: Should we really make the assumption |
573 | that nobody will try to debug files longer than 64K lines? What about | |
574 | machine generated programs? */ | |
c906108c | 575 | |
17c5ed2c | 576 | unsigned short line; |
c906108c | 577 | |
a67af2b9 AC |
578 | /* Method's for symbol's of this class. */ |
579 | /* NOTE: cagney/2003-11-02: See comment above attached to "aclass". */ | |
580 | ||
581 | const struct symbol_ops *ops; | |
582 | ||
10f4ecb8 UW |
583 | /* An arbitrary data pointer, allowing symbol readers to record |
584 | additional information on a per-symbol basis. Note that this data | |
585 | must be allocated using the same obstack as the symbol itself. */ | |
2a2d4dc3 | 586 | /* So far it is only used by LOC_COMPUTED to |
10f4ecb8 UW |
587 | find the location information. For a LOC_BLOCK symbol |
588 | for a function in a compilation unit compiled with DWARF 2 | |
589 | information, this is information used internally by the DWARF 2 | |
590 | code --- specifically, the location expression for the frame | |
591 | base for this function. */ | |
592 | /* FIXME drow/2003-02-21: For the LOC_BLOCK case, it might be better | |
593 | to add a magic symbol to the block containing this information, | |
594 | or to have a generic debug info annotation slot for symbols. */ | |
595 | ||
596 | void *aux_value; | |
c906108c | 597 | |
17c5ed2c DC |
598 | struct symbol *hash_next; |
599 | }; | |
c906108c SS |
600 | |
601 | ||
176620f1 | 602 | #define SYMBOL_DOMAIN(symbol) (symbol)->domain |
c906108c | 603 | #define SYMBOL_CLASS(symbol) (symbol)->aclass |
2a2d4dc3 | 604 | #define SYMBOL_IS_ARGUMENT(symbol) (symbol)->is_argument |
c906108c SS |
605 | #define SYMBOL_TYPE(symbol) (symbol)->type |
606 | #define SYMBOL_LINE(symbol) (symbol)->line | |
cb1df416 | 607 | #define SYMBOL_SYMTAB(symbol) (symbol)->symtab |
a67af2b9 | 608 | #define SYMBOL_OPS(symbol) (symbol)->ops |
10f4ecb8 | 609 | #define SYMBOL_LOCATION_BATON(symbol) (symbol)->aux_value |
c906108c | 610 | \f |
176620f1 | 611 | /* A partial_symbol records the name, domain, and address class of |
c906108c SS |
612 | symbols whose types we have not parsed yet. For functions, it also |
613 | contains their memory address, so we can find them from a PC value. | |
614 | Each partial_symbol sits in a partial_symtab, all of which are chained | |
a960f249 | 615 | on a partial symtab list and which points to the corresponding |
c906108c SS |
616 | normal symtab once the partial_symtab has been referenced. */ |
617 | ||
a7f19c79 MC |
618 | /* This structure is space critical. See space comments at the top. */ |
619 | ||
c906108c | 620 | struct partial_symbol |
17c5ed2c | 621 | { |
c906108c | 622 | |
17c5ed2c | 623 | /* The general symbol info required for all types of symbols. */ |
c906108c | 624 | |
17c5ed2c | 625 | struct general_symbol_info ginfo; |
c906108c | 626 | |
17c5ed2c | 627 | /* Name space code. */ |
c906108c | 628 | |
87193939 | 629 | ENUM_BITFIELD(domain_enum_tag) domain : 6; |
c906108c | 630 | |
17c5ed2c | 631 | /* Address class (for info_symbols) */ |
c906108c | 632 | |
87193939 | 633 | ENUM_BITFIELD(address_class) aclass : 6; |
c906108c | 634 | |
17c5ed2c | 635 | }; |
c906108c | 636 | |
176620f1 | 637 | #define PSYMBOL_DOMAIN(psymbol) (psymbol)->domain |
c906108c | 638 | #define PSYMBOL_CLASS(psymbol) (psymbol)->aclass |
c906108c | 639 | \f |
c5aa993b | 640 | |
c906108c SS |
641 | /* Each item represents a line-->pc (or the reverse) mapping. This is |
642 | somewhat more wasteful of space than one might wish, but since only | |
643 | the files which are actually debugged are read in to core, we don't | |
644 | waste much space. */ | |
645 | ||
646 | struct linetable_entry | |
17c5ed2c DC |
647 | { |
648 | int line; | |
649 | CORE_ADDR pc; | |
650 | }; | |
c906108c SS |
651 | |
652 | /* The order of entries in the linetable is significant. They should | |
653 | be sorted by increasing values of the pc field. If there is more than | |
654 | one entry for a given pc, then I'm not sure what should happen (and | |
655 | I not sure whether we currently handle it the best way). | |
656 | ||
657 | Example: a C for statement generally looks like this | |
658 | ||
c5aa993b JM |
659 | 10 0x100 - for the init/test part of a for stmt. |
660 | 20 0x200 | |
661 | 30 0x300 | |
662 | 10 0x400 - for the increment part of a for stmt. | |
c906108c | 663 | |
e8717518 FF |
664 | If an entry has a line number of zero, it marks the start of a PC |
665 | range for which no line number information is available. It is | |
666 | acceptable, though wasteful of table space, for such a range to be | |
667 | zero length. */ | |
c906108c SS |
668 | |
669 | struct linetable | |
17c5ed2c DC |
670 | { |
671 | int nitems; | |
c906108c | 672 | |
17c5ed2c DC |
673 | /* Actually NITEMS elements. If you don't like this use of the |
674 | `struct hack', you can shove it up your ANSI (seriously, if the | |
675 | committee tells us how to do it, we can probably go along). */ | |
676 | struct linetable_entry item[1]; | |
677 | }; | |
c906108c | 678 | |
c906108c SS |
679 | /* How to relocate the symbols from each section in a symbol file. |
680 | Each struct contains an array of offsets. | |
681 | The ordering and meaning of the offsets is file-type-dependent; | |
682 | typically it is indexed by section numbers or symbol types or | |
683 | something like that. | |
684 | ||
685 | To give us flexibility in changing the internal representation | |
686 | of these offsets, the ANOFFSET macro must be used to insert and | |
687 | extract offset values in the struct. */ | |
688 | ||
689 | struct section_offsets | |
17c5ed2c DC |
690 | { |
691 | CORE_ADDR offsets[1]; /* As many as needed. */ | |
692 | }; | |
c906108c | 693 | |
a4c8257b | 694 | #define ANOFFSET(secoff, whichone) \ |
8e65ff28 | 695 | ((whichone == -1) \ |
e2e0b3e5 | 696 | ? (internal_error (__FILE__, __LINE__, _("Section index is uninitialized")), -1) \ |
8e65ff28 | 697 | : secoff->offsets[whichone]) |
c906108c | 698 | |
b29c9944 JB |
699 | /* The size of a section_offsets table for N sections. */ |
700 | #define SIZEOF_N_SECTION_OFFSETS(n) \ | |
c906108c | 701 | (sizeof (struct section_offsets) \ |
b29c9944 JB |
702 | + sizeof (((struct section_offsets *) 0)->offsets) * ((n)-1)) |
703 | ||
a960f249 | 704 | /* Each source file or header is represented by a struct symtab. |
c906108c SS |
705 | These objects are chained through the `next' field. */ |
706 | ||
707 | struct symtab | |
17c5ed2c | 708 | { |
c906108c | 709 | |
17c5ed2c | 710 | /* Chain of all existing symtabs. */ |
c906108c | 711 | |
17c5ed2c | 712 | struct symtab *next; |
c906108c | 713 | |
17c5ed2c DC |
714 | /* List of all symbol scope blocks for this symtab. May be shared |
715 | between different symtabs (and normally is for all the symtabs | |
716 | in a given compilation unit). */ | |
c906108c | 717 | |
17c5ed2c | 718 | struct blockvector *blockvector; |
c906108c | 719 | |
17c5ed2c DC |
720 | /* Table mapping core addresses to line numbers for this file. |
721 | Can be NULL if none. Never shared between different symtabs. */ | |
c906108c | 722 | |
17c5ed2c | 723 | struct linetable *linetable; |
c906108c | 724 | |
17c5ed2c DC |
725 | /* Section in objfile->section_offsets for the blockvector and |
726 | the linetable. Probably always SECT_OFF_TEXT. */ | |
c906108c | 727 | |
17c5ed2c | 728 | int block_line_section; |
c906108c | 729 | |
17c5ed2c DC |
730 | /* If several symtabs share a blockvector, exactly one of them |
731 | should be designated the primary, so that the blockvector | |
732 | is relocated exactly once by objfile_relocate. */ | |
c906108c | 733 | |
17c5ed2c | 734 | int primary; |
c906108c | 735 | |
17c5ed2c DC |
736 | /* The macro table for this symtab. Like the blockvector, this |
737 | may be shared between different symtabs --- and normally is for | |
738 | all the symtabs in a given compilation unit. */ | |
739 | struct macro_table *macro_table; | |
99d9066e | 740 | |
17c5ed2c | 741 | /* Name of this source file. */ |
c906108c | 742 | |
17c5ed2c | 743 | char *filename; |
c906108c | 744 | |
17c5ed2c | 745 | /* Directory in which it was compiled, or NULL if we don't know. */ |
c906108c | 746 | |
17c5ed2c | 747 | char *dirname; |
c906108c | 748 | |
17c5ed2c | 749 | /* This component says how to free the data we point to: |
17c5ed2c DC |
750 | free_nothing => do nothing; some other symtab will free |
751 | the data this one uses. | |
752 | free_linetable => free just the linetable. FIXME: Is this redundant | |
753 | with the primary field? */ | |
c906108c | 754 | |
17c5ed2c DC |
755 | enum free_code |
756 | { | |
f73634e5 | 757 | free_nothing, free_linetable |
17c5ed2c DC |
758 | } |
759 | free_code; | |
c906108c | 760 | |
de4f826b DC |
761 | /* A function to call to free space, if necessary. This is IN |
762 | ADDITION to the action indicated by free_code. */ | |
c5aa993b | 763 | |
de4f826b | 764 | void (*free_func)(struct symtab *symtab); |
c906108c | 765 | |
17c5ed2c | 766 | /* Total number of lines found in source file. */ |
c906108c | 767 | |
17c5ed2c | 768 | int nlines; |
c906108c | 769 | |
17c5ed2c DC |
770 | /* line_charpos[N] is the position of the (N-1)th line of the |
771 | source file. "position" means something we can lseek() to; it | |
772 | is not guaranteed to be useful any other way. */ | |
c906108c | 773 | |
17c5ed2c | 774 | int *line_charpos; |
c906108c | 775 | |
17c5ed2c | 776 | /* Language of this source file. */ |
c906108c | 777 | |
17c5ed2c | 778 | enum language language; |
c906108c | 779 | |
17c5ed2c DC |
780 | /* String that identifies the format of the debugging information, such |
781 | as "stabs", "dwarf 1", "dwarf 2", "coff", etc. This is mostly useful | |
782 | for automated testing of gdb but may also be information that is | |
783 | useful to the user. */ | |
c906108c | 784 | |
17c5ed2c | 785 | char *debugformat; |
c906108c | 786 | |
303b6f5d | 787 | /* String of producer version information. May be zero. */ |
c906108c | 788 | |
303b6f5d | 789 | char *producer; |
c906108c | 790 | |
17c5ed2c DC |
791 | /* Full name of file as found by searching the source path. |
792 | NULL if not yet known. */ | |
c906108c | 793 | |
17c5ed2c | 794 | char *fullname; |
c906108c | 795 | |
17c5ed2c | 796 | /* Object file from which this symbol information was read. */ |
c906108c | 797 | |
17c5ed2c | 798 | struct objfile *objfile; |
c906108c | 799 | |
17c5ed2c | 800 | }; |
c906108c SS |
801 | |
802 | #define BLOCKVECTOR(symtab) (symtab)->blockvector | |
803 | #define LINETABLE(symtab) (symtab)->linetable | |
c906108c | 804 | \f |
c5aa993b | 805 | |
c906108c SS |
806 | /* Each source file that has not been fully read in is represented by |
807 | a partial_symtab. This contains the information on where in the | |
808 | executable the debugging symbols for a specific file are, and a | |
809 | list of names of global symbols which are located in this file. | |
810 | They are all chained on partial symtab lists. | |
811 | ||
812 | Even after the source file has been read into a symtab, the | |
813 | partial_symtab remains around. They are allocated on an obstack, | |
8b92e4d5 | 814 | objfile_obstack. FIXME, this is bad for dynamic linking or VxWorks- |
c906108c SS |
815 | style execution of a bunch of .o's. */ |
816 | ||
817 | struct partial_symtab | |
17c5ed2c | 818 | { |
c906108c | 819 | |
17c5ed2c | 820 | /* Chain of all existing partial symtabs. */ |
c906108c | 821 | |
17c5ed2c | 822 | struct partial_symtab *next; |
c906108c | 823 | |
17c5ed2c | 824 | /* Name of the source file which this partial_symtab defines */ |
c906108c | 825 | |
17c5ed2c | 826 | char *filename; |
c906108c | 827 | |
17c5ed2c | 828 | /* Full path of the source file. NULL if not known. */ |
58d370e0 | 829 | |
17c5ed2c | 830 | char *fullname; |
58d370e0 | 831 | |
57c22c6c BR |
832 | /* Directory in which it was compiled, or NULL if we don't know. */ |
833 | ||
834 | char *dirname; | |
835 | ||
17c5ed2c | 836 | /* Information about the object file from which symbols should be read. */ |
c906108c | 837 | |
17c5ed2c | 838 | struct objfile *objfile; |
c906108c | 839 | |
17c5ed2c | 840 | /* Set of relocation offsets to apply to each section. */ |
c906108c | 841 | |
17c5ed2c | 842 | struct section_offsets *section_offsets; |
c906108c | 843 | |
17c5ed2c DC |
844 | /* Range of text addresses covered by this file; texthigh is the |
845 | beginning of the next section. */ | |
c906108c | 846 | |
17c5ed2c DC |
847 | CORE_ADDR textlow; |
848 | CORE_ADDR texthigh; | |
c906108c | 849 | |
17c5ed2c DC |
850 | /* Array of pointers to all of the partial_symtab's which this one |
851 | depends on. Since this array can only be set to previous or | |
852 | the current (?) psymtab, this dependency tree is guaranteed not | |
853 | to have any loops. "depends on" means that symbols must be read | |
854 | for the dependencies before being read for this psymtab; this is | |
855 | for type references in stabs, where if foo.c includes foo.h, declarations | |
856 | in foo.h may use type numbers defined in foo.c. For other debugging | |
857 | formats there may be no need to use dependencies. */ | |
c906108c | 858 | |
17c5ed2c | 859 | struct partial_symtab **dependencies; |
c906108c | 860 | |
17c5ed2c | 861 | int number_of_dependencies; |
c906108c | 862 | |
17c5ed2c DC |
863 | /* Global symbol list. This list will be sorted after readin to |
864 | improve access. Binary search will be the usual method of | |
865 | finding a symbol within it. globals_offset is an integer offset | |
866 | within global_psymbols[]. */ | |
c906108c | 867 | |
17c5ed2c DC |
868 | int globals_offset; |
869 | int n_global_syms; | |
c906108c | 870 | |
17c5ed2c DC |
871 | /* Static symbol list. This list will *not* be sorted after readin; |
872 | to find a symbol in it, exhaustive search must be used. This is | |
873 | reasonable because searches through this list will eventually | |
874 | lead to either the read in of a files symbols for real (assumed | |
875 | to take a *lot* of time; check) or an error (and we don't care | |
876 | how long errors take). This is an offset and size within | |
877 | static_psymbols[]. */ | |
c906108c | 878 | |
17c5ed2c DC |
879 | int statics_offset; |
880 | int n_static_syms; | |
c906108c | 881 | |
17c5ed2c DC |
882 | /* Pointer to symtab eventually allocated for this source file, 0 if |
883 | !readin or if we haven't looked for the symtab after it was readin. */ | |
c906108c | 884 | |
17c5ed2c | 885 | struct symtab *symtab; |
c906108c | 886 | |
17c5ed2c DC |
887 | /* Pointer to function which will read in the symtab corresponding to |
888 | this psymtab. */ | |
c906108c | 889 | |
17c5ed2c | 890 | void (*read_symtab) (struct partial_symtab *); |
c906108c | 891 | |
17c5ed2c DC |
892 | /* Information that lets read_symtab() locate the part of the symbol table |
893 | that this psymtab corresponds to. This information is private to the | |
894 | format-dependent symbol reading routines. For further detail examine | |
895 | the various symbol reading modules. Should really be (void *) but is | |
896 | (char *) as with other such gdb variables. (FIXME) */ | |
c906108c | 897 | |
17c5ed2c | 898 | char *read_symtab_private; |
c906108c | 899 | |
17c5ed2c | 900 | /* Non-zero if the symtab corresponding to this psymtab has been readin */ |
c906108c | 901 | |
17c5ed2c DC |
902 | unsigned char readin; |
903 | }; | |
c906108c SS |
904 | |
905 | /* A fast way to get from a psymtab to its symtab (after the first time). */ | |
906 | #define PSYMTAB_TO_SYMTAB(pst) \ | |
907 | ((pst) -> symtab != NULL ? (pst) -> symtab : psymtab_to_symtab (pst)) | |
c906108c | 908 | \f |
c5aa993b | 909 | |
c906108c | 910 | /* The virtual function table is now an array of structures which have the |
a960f249 | 911 | form { int16 offset, delta; void *pfn; }. |
c906108c SS |
912 | |
913 | In normal virtual function tables, OFFSET is unused. | |
914 | DELTA is the amount which is added to the apparent object's base | |
915 | address in order to point to the actual object to which the | |
916 | virtual function should be applied. | |
917 | PFN is a pointer to the virtual function. | |
918 | ||
919 | Note that this macro is g++ specific (FIXME). */ | |
c5aa993b | 920 | |
c906108c SS |
921 | #define VTBL_FNADDR_OFFSET 2 |
922 | ||
c906108c SS |
923 | /* External variables and functions for the objects described above. */ |
924 | ||
c906108c SS |
925 | /* See the comment in symfile.c about how current_objfile is used. */ |
926 | ||
927 | extern struct objfile *current_objfile; | |
928 | ||
929 | /* True if we are nested inside psymtab_to_symtab. */ | |
930 | ||
931 | extern int currently_reading_symtab; | |
932 | ||
933 | /* From utils.c. */ | |
934 | extern int demangle; | |
935 | extern int asm_demangle; | |
936 | ||
937 | /* symtab.c lookup functions */ | |
938 | ||
7fc830e2 MK |
939 | extern const char multiple_symbols_ask[]; |
940 | extern const char multiple_symbols_all[]; | |
941 | extern const char multiple_symbols_cancel[]; | |
717d2f5a JB |
942 | |
943 | const char *multiple_symbols_select_mode (void); | |
944 | ||
5eeb2539 AR |
945 | int symbol_matches_domain (enum language symbol_language, |
946 | domain_enum symbol_domain, | |
947 | domain_enum domain); | |
948 | ||
c906108c SS |
949 | /* lookup a symbol table by source file name */ |
950 | ||
1f8cc6db | 951 | extern struct symtab *lookup_symtab (const char *); |
c906108c | 952 | |
6c9353d3 | 953 | /* lookup a symbol by name (optional block) in language. */ |
53c5240f PA |
954 | |
955 | extern struct symbol *lookup_symbol_in_language (const char *, | |
956 | const struct block *, | |
957 | const domain_enum, | |
958 | enum language, | |
2570f2b7 | 959 | int *); |
53c5240f PA |
960 | |
961 | /* lookup a symbol by name (optional block, optional symtab) | |
962 | in the current language */ | |
c906108c | 963 | |
a14ed312 | 964 | extern struct symbol *lookup_symbol (const char *, const struct block *, |
2570f2b7 | 965 | const domain_enum, int *); |
c906108c | 966 | |
5f9a71c3 DC |
967 | /* A default version of lookup_symbol_nonlocal for use by languages |
968 | that can't think of anything better to do. */ | |
969 | ||
970 | extern struct symbol *basic_lookup_symbol_nonlocal (const char *, | |
971 | const char *, | |
972 | const struct block *, | |
21b556f4 | 973 | const domain_enum); |
5f9a71c3 DC |
974 | |
975 | /* Some helper functions for languages that need to write their own | |
976 | lookup_symbol_nonlocal functions. */ | |
977 | ||
978 | /* Lookup a symbol in the static block associated to BLOCK, if there | |
979 | is one; do nothing if BLOCK is NULL or a global block. */ | |
980 | ||
981 | extern struct symbol *lookup_symbol_static (const char *name, | |
982 | const char *linkage_name, | |
983 | const struct block *block, | |
21b556f4 | 984 | const domain_enum domain); |
5f9a71c3 DC |
985 | |
986 | /* Lookup a symbol in all files' global blocks (searching psymtabs if | |
987 | necessary). */ | |
988 | ||
989 | extern struct symbol *lookup_symbol_global (const char *name, | |
990 | const char *linkage_name, | |
3a40aaa0 | 991 | const struct block *block, |
21b556f4 | 992 | const domain_enum domain); |
5f9a71c3 DC |
993 | |
994 | /* Lookup a symbol within the block BLOCK. This, unlike | |
995 | lookup_symbol_block, will set SYMTAB and BLOCK_FOUND correctly, and | |
996 | will fix up the symbol if necessary. */ | |
997 | ||
998 | extern struct symbol *lookup_symbol_aux_block (const char *name, | |
999 | const char *linkage_name, | |
1000 | const struct block *block, | |
21b556f4 | 1001 | const domain_enum domain); |
5f9a71c3 | 1002 | |
b6429628 DC |
1003 | /* Lookup a partial symbol. */ |
1004 | ||
1005 | extern struct partial_symbol *lookup_partial_symbol (struct partial_symtab *, | |
1006 | const char *, | |
1007 | const char *, int, | |
1008 | domain_enum); | |
1009 | ||
c906108c | 1010 | /* lookup a symbol by name, within a specified block */ |
c5aa993b | 1011 | |
a14ed312 | 1012 | extern struct symbol *lookup_block_symbol (const struct block *, const char *, |
3121eff0 | 1013 | const char *, |
176620f1 | 1014 | const domain_enum); |
c906108c SS |
1015 | |
1016 | /* lookup a [struct, union, enum] by name, within a specified block */ | |
1017 | ||
a14ed312 | 1018 | extern struct type *lookup_struct (char *, struct block *); |
c906108c | 1019 | |
a14ed312 | 1020 | extern struct type *lookup_union (char *, struct block *); |
c906108c | 1021 | |
a14ed312 | 1022 | extern struct type *lookup_enum (char *, struct block *); |
c906108c | 1023 | |
c906108c SS |
1024 | /* from blockframe.c: */ |
1025 | ||
1026 | /* lookup the function symbol corresponding to the address */ | |
1027 | ||
a14ed312 | 1028 | extern struct symbol *find_pc_function (CORE_ADDR); |
c906108c SS |
1029 | |
1030 | /* lookup the function corresponding to the address and section */ | |
1031 | ||
714835d5 | 1032 | extern struct symbol *find_pc_sect_function (CORE_ADDR, struct obj_section *); |
c5aa993b | 1033 | |
c906108c SS |
1034 | /* lookup function from address, return name, start addr and end addr */ |
1035 | ||
570b8f7c AC |
1036 | extern int find_pc_partial_function (CORE_ADDR, char **, CORE_ADDR *, |
1037 | CORE_ADDR *); | |
c906108c | 1038 | |
a14ed312 | 1039 | extern void clear_pc_function_cache (void); |
c906108c | 1040 | |
c906108c SS |
1041 | /* from symtab.c: */ |
1042 | ||
1043 | /* lookup partial symbol table by filename */ | |
1044 | ||
1f8cc6db | 1045 | extern struct partial_symtab *lookup_partial_symtab (const char *); |
c906108c SS |
1046 | |
1047 | /* lookup partial symbol table by address */ | |
1048 | ||
a14ed312 | 1049 | extern struct partial_symtab *find_pc_psymtab (CORE_ADDR); |
c906108c SS |
1050 | |
1051 | /* lookup partial symbol table by address and section */ | |
1052 | ||
714835d5 UW |
1053 | extern struct partial_symtab *find_pc_sect_psymtab (CORE_ADDR, |
1054 | struct obj_section *); | |
c906108c SS |
1055 | |
1056 | /* lookup full symbol table by address */ | |
1057 | ||
a14ed312 | 1058 | extern struct symtab *find_pc_symtab (CORE_ADDR); |
c906108c SS |
1059 | |
1060 | /* lookup full symbol table by address and section */ | |
1061 | ||
714835d5 | 1062 | extern struct symtab *find_pc_sect_symtab (CORE_ADDR, struct obj_section *); |
c906108c SS |
1063 | |
1064 | /* lookup partial symbol by address */ | |
1065 | ||
a14ed312 KB |
1066 | extern struct partial_symbol *find_pc_psymbol (struct partial_symtab *, |
1067 | CORE_ADDR); | |
c906108c SS |
1068 | |
1069 | /* lookup partial symbol by address and section */ | |
1070 | ||
a14ed312 | 1071 | extern struct partial_symbol *find_pc_sect_psymbol (struct partial_symtab *, |
714835d5 UW |
1072 | CORE_ADDR, |
1073 | struct obj_section *); | |
c906108c | 1074 | |
a14ed312 | 1075 | extern int find_pc_line_pc_range (CORE_ADDR, CORE_ADDR *, CORE_ADDR *); |
c906108c | 1076 | |
a14ed312 | 1077 | extern void reread_symbols (void); |
c906108c | 1078 | |
a14ed312 | 1079 | extern struct type *lookup_transparent_type (const char *); |
b368761e | 1080 | extern struct type *basic_lookup_transparent_type (const char *); |
c906108c SS |
1081 | |
1082 | ||
1083 | /* Macro for name of symbol to indicate a file compiled with gcc. */ | |
1084 | #ifndef GCC_COMPILED_FLAG_SYMBOL | |
1085 | #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled." | |
1086 | #endif | |
1087 | ||
1088 | /* Macro for name of symbol to indicate a file compiled with gcc2. */ | |
1089 | #ifndef GCC2_COMPILED_FLAG_SYMBOL | |
1090 | #define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled." | |
1091 | #endif | |
1092 | ||
1093 | /* Functions for dealing with the minimal symbol table, really a misc | |
1094 | address<->symbol mapping for things we don't have debug symbols for. */ | |
1095 | ||
a14ed312 KB |
1096 | extern void prim_record_minimal_symbol (const char *, CORE_ADDR, |
1097 | enum minimal_symbol_type, | |
1098 | struct objfile *); | |
c906108c SS |
1099 | |
1100 | extern struct minimal_symbol *prim_record_minimal_symbol_and_info | |
a14ed312 KB |
1101 | (const char *, CORE_ADDR, |
1102 | enum minimal_symbol_type, | |
1103 | char *info, int section, asection * bfd_section, struct objfile *); | |
c906108c | 1104 | |
a14ed312 | 1105 | extern unsigned int msymbol_hash_iw (const char *); |
9227b5eb | 1106 | |
a14ed312 | 1107 | extern unsigned int msymbol_hash (const char *); |
9227b5eb | 1108 | |
bccdca4a UW |
1109 | extern struct objfile * msymbol_objfile (struct minimal_symbol *sym); |
1110 | ||
9227b5eb JB |
1111 | extern void |
1112 | add_minsym_to_hash_table (struct minimal_symbol *sym, | |
1113 | struct minimal_symbol **table); | |
1114 | ||
a14ed312 KB |
1115 | extern struct minimal_symbol *lookup_minimal_symbol (const char *, |
1116 | const char *, | |
1117 | struct objfile *); | |
c906108c | 1118 | |
a14ed312 | 1119 | extern struct minimal_symbol *lookup_minimal_symbol_text (const char *, |
a14ed312 | 1120 | struct objfile *); |
c906108c | 1121 | |
a14ed312 | 1122 | struct minimal_symbol *lookup_minimal_symbol_solib_trampoline (const char *, |
a14ed312 KB |
1123 | struct objfile |
1124 | *); | |
c906108c | 1125 | |
907fc202 UW |
1126 | extern struct minimal_symbol *lookup_minimal_symbol_by_pc_name |
1127 | (CORE_ADDR, const char *, struct objfile *); | |
1128 | ||
a14ed312 | 1129 | extern struct minimal_symbol *lookup_minimal_symbol_by_pc (CORE_ADDR); |
c906108c | 1130 | |
714835d5 UW |
1131 | extern struct minimal_symbol |
1132 | *lookup_minimal_symbol_by_pc_section (CORE_ADDR, struct obj_section *); | |
c906108c | 1133 | |
a14ed312 KB |
1134 | extern struct minimal_symbol |
1135 | *lookup_solib_trampoline_symbol_by_pc (CORE_ADDR); | |
c906108c | 1136 | |
52f729a7 | 1137 | extern CORE_ADDR find_solib_trampoline_target (struct frame_info *, CORE_ADDR); |
c906108c | 1138 | |
a14ed312 | 1139 | extern void init_minimal_symbol_collection (void); |
c906108c | 1140 | |
56e290f4 | 1141 | extern struct cleanup *make_cleanup_discard_minimal_symbols (void); |
c906108c | 1142 | |
a14ed312 | 1143 | extern void install_minimal_symbols (struct objfile *); |
c906108c SS |
1144 | |
1145 | /* Sort all the minimal symbols in OBJFILE. */ | |
1146 | ||
a14ed312 | 1147 | extern void msymbols_sort (struct objfile *objfile); |
c906108c SS |
1148 | |
1149 | struct symtab_and_line | |
17c5ed2c DC |
1150 | { |
1151 | struct symtab *symtab; | |
714835d5 | 1152 | struct obj_section *section; |
17c5ed2c DC |
1153 | /* Line number. Line numbers start at 1 and proceed through symtab->nlines. |
1154 | 0 is never a valid line number; it is used to indicate that line number | |
1155 | information is not available. */ | |
1156 | int line; | |
1157 | ||
1158 | CORE_ADDR pc; | |
1159 | CORE_ADDR end; | |
ed0616c6 VP |
1160 | int explicit_pc; |
1161 | int explicit_line; | |
17c5ed2c | 1162 | }; |
c906108c | 1163 | |
fe39c653 | 1164 | extern void init_sal (struct symtab_and_line *sal); |
c906108c SS |
1165 | |
1166 | struct symtabs_and_lines | |
17c5ed2c DC |
1167 | { |
1168 | struct symtab_and_line *sals; | |
1169 | int nelts; | |
1170 | }; | |
c5aa993b | 1171 | \f |
c906108c SS |
1172 | |
1173 | ||
c906108c SS |
1174 | /* Some types and macros needed for exception catchpoints. |
1175 | Can't put these in target.h because symtab_and_line isn't | |
1176 | known there. This file will be included by breakpoint.c, | |
1177 | hppa-tdep.c, etc. */ | |
1178 | ||
1179 | /* Enums for exception-handling support */ | |
c5aa993b | 1180 | enum exception_event_kind |
17c5ed2c DC |
1181 | { |
1182 | EX_EVENT_THROW, | |
1183 | EX_EVENT_CATCH | |
1184 | }; | |
c906108c | 1185 | |
c906108c SS |
1186 | \f |
1187 | ||
1188 | /* Given a pc value, return line number it is in. Second arg nonzero means | |
1189 | if pc is on the boundary use the previous statement's line number. */ | |
1190 | ||
a14ed312 | 1191 | extern struct symtab_and_line find_pc_line (CORE_ADDR, int); |
c906108c SS |
1192 | |
1193 | /* Same function, but specify a section as well as an address */ | |
1194 | ||
714835d5 UW |
1195 | extern struct symtab_and_line find_pc_sect_line (CORE_ADDR, |
1196 | struct obj_section *, int); | |
c906108c | 1197 | |
c906108c SS |
1198 | /* Given a symtab and line number, return the pc there. */ |
1199 | ||
a14ed312 | 1200 | extern int find_line_pc (struct symtab *, int, CORE_ADDR *); |
c906108c | 1201 | |
570b8f7c AC |
1202 | extern int find_line_pc_range (struct symtab_and_line, CORE_ADDR *, |
1203 | CORE_ADDR *); | |
c906108c | 1204 | |
a14ed312 | 1205 | extern void resolve_sal_pc (struct symtab_and_line *); |
c906108c SS |
1206 | |
1207 | /* Given a string, return the line specified by it. For commands like "list" | |
1208 | and "breakpoint". */ | |
1209 | ||
a14ed312 | 1210 | extern struct symtabs_and_lines decode_line_spec (char *, int); |
c906108c | 1211 | |
a14ed312 | 1212 | extern struct symtabs_and_lines decode_line_spec_1 (char *, int); |
c906108c | 1213 | |
c906108c SS |
1214 | /* Symmisc.c */ |
1215 | ||
a14ed312 | 1216 | void maintenance_print_symbols (char *, int); |
c906108c | 1217 | |
a14ed312 | 1218 | void maintenance_print_psymbols (char *, int); |
c906108c | 1219 | |
a14ed312 | 1220 | void maintenance_print_msymbols (char *, int); |
c906108c | 1221 | |
a14ed312 | 1222 | void maintenance_print_objfiles (char *, int); |
c906108c | 1223 | |
5e7b2f39 | 1224 | void maintenance_info_symtabs (char *, int); |
44ea7b70 | 1225 | |
5e7b2f39 | 1226 | void maintenance_info_psymtabs (char *, int); |
44ea7b70 | 1227 | |
a14ed312 | 1228 | void maintenance_check_symtabs (char *, int); |
c906108c SS |
1229 | |
1230 | /* maint.c */ | |
1231 | ||
a14ed312 | 1232 | void maintenance_print_statistics (char *, int); |
c906108c | 1233 | |
a14ed312 | 1234 | extern void free_symtab (struct symtab *); |
c906108c SS |
1235 | |
1236 | /* Symbol-reading stuff in symfile.c and solib.c. */ | |
1237 | ||
a14ed312 | 1238 | extern struct symtab *psymtab_to_symtab (struct partial_symtab *); |
c906108c | 1239 | |
a14ed312 | 1240 | extern void clear_solib (void); |
c906108c | 1241 | |
c906108c SS |
1242 | /* source.c */ |
1243 | ||
a14ed312 | 1244 | extern int identify_source_line (struct symtab *, int, int, CORE_ADDR); |
c906108c | 1245 | |
a14ed312 | 1246 | extern void print_source_lines (struct symtab *, int, int, int); |
c906108c | 1247 | |
a14ed312 | 1248 | extern void forget_cached_source_info (void); |
c906108c | 1249 | |
a14ed312 | 1250 | extern void select_source_symtab (struct symtab *); |
c906108c | 1251 | |
41d27058 | 1252 | extern char **default_make_symbol_completion_list (char *, char *); |
a14ed312 | 1253 | extern char **make_symbol_completion_list (char *, char *); |
c906108c | 1254 | |
c94fdfd0 EZ |
1255 | extern char **make_file_symbol_completion_list (char *, char *, char *); |
1256 | ||
c94fdfd0 EZ |
1257 | extern char **make_source_files_completion_list (char *, char *); |
1258 | ||
c906108c SS |
1259 | /* symtab.c */ |
1260 | ||
714835d5 | 1261 | int matching_obj_sections (struct obj_section *, struct obj_section *); |
94277a38 | 1262 | |
a14ed312 | 1263 | extern struct partial_symtab *find_main_psymtab (void); |
c906108c | 1264 | |
50641945 FN |
1265 | extern struct symtab *find_line_symtab (struct symtab *, int, int *, int *); |
1266 | ||
bccdca4a | 1267 | extern CORE_ADDR find_function_start_pc (struct gdbarch *, |
714835d5 | 1268 | CORE_ADDR, struct obj_section *); |
bccdca4a | 1269 | |
17c5ed2c DC |
1270 | extern struct symtab_and_line find_function_start_sal (struct symbol *sym, |
1271 | int); | |
50641945 | 1272 | |
c906108c SS |
1273 | /* symfile.c */ |
1274 | ||
a14ed312 | 1275 | extern void clear_symtab_users (void); |
c906108c | 1276 | |
a14ed312 | 1277 | extern enum language deduce_language_from_filename (char *); |
c906108c SS |
1278 | |
1279 | /* symtab.c */ | |
1280 | ||
a14ed312 | 1281 | extern int in_prologue (CORE_ADDR pc, CORE_ADDR func_start); |
c906108c | 1282 | |
634aa483 AC |
1283 | extern CORE_ADDR skip_prologue_using_sal (CORE_ADDR func_addr); |
1284 | ||
a14ed312 KB |
1285 | extern struct symbol *fixup_symbol_section (struct symbol *, |
1286 | struct objfile *); | |
c906108c | 1287 | |
7a78d0ee KB |
1288 | extern struct partial_symbol *fixup_psymbol_section (struct partial_symbol |
1289 | *psym, | |
1290 | struct objfile *objfile); | |
1291 | ||
c906108c SS |
1292 | /* Symbol searching */ |
1293 | ||
1294 | /* When using search_symbols, a list of the following structs is returned. | |
7e73cedf | 1295 | Callers must free the search list using free_search_symbols! */ |
c906108c | 1296 | struct symbol_search |
17c5ed2c DC |
1297 | { |
1298 | /* The block in which the match was found. Could be, for example, | |
1299 | STATIC_BLOCK or GLOBAL_BLOCK. */ | |
1300 | int block; | |
c906108c | 1301 | |
17c5ed2c | 1302 | /* Information describing what was found. |
c906108c | 1303 | |
17c5ed2c DC |
1304 | If symtab abd symbol are NOT NULL, then information was found |
1305 | for this match. */ | |
1306 | struct symtab *symtab; | |
1307 | struct symbol *symbol; | |
c906108c | 1308 | |
17c5ed2c DC |
1309 | /* If msymbol is non-null, then a match was made on something for |
1310 | which only minimal_symbols exist. */ | |
1311 | struct minimal_symbol *msymbol; | |
c906108c | 1312 | |
17c5ed2c DC |
1313 | /* A link to the next match, or NULL for the end. */ |
1314 | struct symbol_search *next; | |
1315 | }; | |
c906108c | 1316 | |
176620f1 | 1317 | extern void search_symbols (char *, domain_enum, int, char **, |
a14ed312 KB |
1318 | struct symbol_search **); |
1319 | extern void free_search_symbols (struct symbol_search *); | |
17c5ed2c DC |
1320 | extern struct cleanup *make_cleanup_free_search_symbols (struct symbol_search |
1321 | *); | |
c906108c | 1322 | |
51cc5b07 AC |
1323 | /* The name of the ``main'' function. |
1324 | FIXME: cagney/2001-03-20: Can't make main_name() const since some | |
1325 | of the calling code currently assumes that the string isn't | |
1326 | const. */ | |
1327 | extern void set_main_name (const char *name); | |
17c5ed2c | 1328 | extern /*const */ char *main_name (void); |
51cc5b07 | 1329 | |
3a40aaa0 UW |
1330 | /* Check global symbols in objfile. */ |
1331 | struct symbol *lookup_global_symbol_from_objfile (const struct objfile *objfile, | |
1332 | const char *name, | |
1333 | const char *linkage_name, | |
21b556f4 | 1334 | const domain_enum domain); |
3a40aaa0 | 1335 | |
ed0616c6 VP |
1336 | extern struct symtabs_and_lines |
1337 | expand_line_sal (struct symtab_and_line sal); | |
3a40aaa0 | 1338 | |
c906108c | 1339 | #endif /* !defined(SYMTAB_H) */ |