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