| 1 | /* Symbol table definitions for GDB. |
| 2 | Copyright 1986, 1989, 1991, 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | #if !defined (SYMTAB_H) |
| 21 | #define SYMTAB_H 1 |
| 22 | |
| 23 | /* Some definitions and declarations to go with use of obstacks. */ |
| 24 | |
| 25 | #include "obstack.h" |
| 26 | #define obstack_chunk_alloc xmalloc |
| 27 | #define obstack_chunk_free free |
| 28 | #include "bcache.h" |
| 29 | |
| 30 | /* Don't do this; it means that if some .o's are compiled with GNU C |
| 31 | and some are not (easy to do accidentally the way we configure |
| 32 | things; also it is a pain to have to "make clean" every time you |
| 33 | want to switch compilers), then GDB dies a horrible death. */ |
| 34 | /* GNU C supports enums that are bitfields. Some compilers don't. */ |
| 35 | #if 0 && defined(__GNUC__) && !defined(BYTE_BITFIELD) |
| 36 | #define BYTE_BITFIELD :8; |
| 37 | #else |
| 38 | #define BYTE_BITFIELD /*nothing*/ |
| 39 | #endif |
| 40 | |
| 41 | /* Define a structure for the information that is common to all symbol types, |
| 42 | including minimal symbols, partial symbols, and full symbols. In a |
| 43 | multilanguage environment, some language specific information may need to |
| 44 | be recorded along with each symbol. |
| 45 | |
| 46 | These fields are ordered to encourage good packing, since we frequently |
| 47 | have tens or hundreds of thousands of these. */ |
| 48 | |
| 49 | struct general_symbol_info |
| 50 | { |
| 51 | /* Name of the symbol. This is a required field. Storage for the name is |
| 52 | allocated on the psymbol_obstack or symbol_obstack for the associated |
| 53 | objfile. */ |
| 54 | |
| 55 | char *name; |
| 56 | |
| 57 | /* Value of the symbol. Which member of this union to use, and what |
| 58 | it means, depends on what kind of symbol this is and its |
| 59 | SYMBOL_CLASS. See comments there for more details. All of these |
| 60 | are in host byte order (though what they point to might be in |
| 61 | target byte order, e.g. LOC_CONST_BYTES). */ |
| 62 | |
| 63 | union |
| 64 | { |
| 65 | /* The fact that this is a long not a LONGEST mainly limits the |
| 66 | range of a LOC_CONST. Since LOC_CONST_BYTES exists, I'm not |
| 67 | sure that is a big deal. */ |
| 68 | long ivalue; |
| 69 | |
| 70 | struct block *block; |
| 71 | |
| 72 | char *bytes; |
| 73 | |
| 74 | CORE_ADDR address; |
| 75 | |
| 76 | /* for opaque typedef struct chain */ |
| 77 | |
| 78 | struct symbol *chain; |
| 79 | } |
| 80 | value; |
| 81 | |
| 82 | /* Since one and only one language can apply, wrap the language specific |
| 83 | information inside a union. */ |
| 84 | |
| 85 | union |
| 86 | { |
| 87 | struct cplus_specific /* For C++ and Java */ |
| 88 | { |
| 89 | char *demangled_name; |
| 90 | } cplus_specific; |
| 91 | struct chill_specific /* For Chill */ |
| 92 | { |
| 93 | char *demangled_name; |
| 94 | } chill_specific; |
| 95 | } language_specific; |
| 96 | |
| 97 | /* Record the source code language that applies to this symbol. |
| 98 | This is used to select one of the fields from the language specific |
| 99 | union above. */ |
| 100 | |
| 101 | enum language language BYTE_BITFIELD; |
| 102 | |
| 103 | /* Which section is this symbol in? This is an index into |
| 104 | section_offsets for this objfile. Negative means that the symbol |
| 105 | does not get relocated relative to a section. |
| 106 | Disclaimer: currently this is just used for xcoff, so don't |
| 107 | expect all symbol-reading code to set it correctly (the ELF code |
| 108 | also tries to set it correctly). */ |
| 109 | |
| 110 | short section; |
| 111 | |
| 112 | /* The bfd section associated with this symbol. */ |
| 113 | |
| 114 | asection *bfd_section; |
| 115 | }; |
| 116 | |
| 117 | extern CORE_ADDR symbol_overlayed_address PARAMS((CORE_ADDR, asection *)); |
| 118 | |
| 119 | #define SYMBOL_NAME(symbol) (symbol)->ginfo.name |
| 120 | #define SYMBOL_VALUE(symbol) (symbol)->ginfo.value.ivalue |
| 121 | #define SYMBOL_VALUE_ADDRESS(symbol) (symbol)->ginfo.value.address |
| 122 | #define SYMBOL_VALUE_BYTES(symbol) (symbol)->ginfo.value.bytes |
| 123 | #define SYMBOL_BLOCK_VALUE(symbol) (symbol)->ginfo.value.block |
| 124 | #define SYMBOL_VALUE_CHAIN(symbol) (symbol)->ginfo.value.chain |
| 125 | #define SYMBOL_LANGUAGE(symbol) (symbol)->ginfo.language |
| 126 | #define SYMBOL_SECTION(symbol) (symbol)->ginfo.section |
| 127 | #define SYMBOL_BFD_SECTION(symbol) (symbol)->ginfo.bfd_section |
| 128 | |
| 129 | #define SYMBOL_CPLUS_DEMANGLED_NAME(symbol) \ |
| 130 | (symbol)->ginfo.language_specific.cplus_specific.demangled_name |
| 131 | |
| 132 | /* Macro that initializes the language dependent portion of a symbol |
| 133 | depending upon the language for the symbol. */ |
| 134 | |
| 135 | #define SYMBOL_INIT_LANGUAGE_SPECIFIC(symbol,language) \ |
| 136 | do { \ |
| 137 | SYMBOL_LANGUAGE (symbol) = language; \ |
| 138 | if (SYMBOL_LANGUAGE (symbol) == language_cplus \ |
| 139 | || SYMBOL_LANGUAGE (symbol) == language_java) \ |
| 140 | { \ |
| 141 | SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = NULL; \ |
| 142 | } \ |
| 143 | else if (SYMBOL_LANGUAGE (symbol) == language_chill) \ |
| 144 | { \ |
| 145 | SYMBOL_CHILL_DEMANGLED_NAME (symbol) = NULL; \ |
| 146 | } \ |
| 147 | else \ |
| 148 | { \ |
| 149 | memset (&(symbol)->ginfo.language_specific, 0, \ |
| 150 | sizeof ((symbol)->ginfo.language_specific)); \ |
| 151 | } \ |
| 152 | } while (0) |
| 153 | |
| 154 | /* Macro that attempts to initialize the demangled name for a symbol, |
| 155 | based on the language of that symbol. If the language is set to |
| 156 | language_auto, it will attempt to find any demangling algorithm |
| 157 | that works and then set the language appropriately. If no demangling |
| 158 | of any kind is found, the language is set back to language_unknown, |
| 159 | so we can avoid doing this work again the next time we encounter |
| 160 | the symbol. Any required space to store the name is obtained from the |
| 161 | specified obstack. */ |
| 162 | |
| 163 | #define SYMBOL_INIT_DEMANGLED_NAME(symbol,obstack) \ |
| 164 | do { \ |
| 165 | char *demangled = NULL; \ |
| 166 | if (SYMBOL_LANGUAGE (symbol) == language_cplus \ |
| 167 | || SYMBOL_LANGUAGE (symbol) == language_auto) \ |
| 168 | { \ |
| 169 | demangled = \ |
| 170 | cplus_demangle (SYMBOL_NAME (symbol), DMGL_PARAMS | DMGL_ANSI);\ |
| 171 | if (demangled != NULL) \ |
| 172 | { \ |
| 173 | SYMBOL_LANGUAGE (symbol) = language_cplus; \ |
| 174 | SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = \ |
| 175 | obsavestring (demangled, strlen (demangled), (obstack)); \ |
| 176 | free (demangled); \ |
| 177 | } \ |
| 178 | else \ |
| 179 | { \ |
| 180 | SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = NULL; \ |
| 181 | } \ |
| 182 | } \ |
| 183 | if (SYMBOL_LANGUAGE (symbol) == language_java) \ |
| 184 | { \ |
| 185 | demangled = \ |
| 186 | cplus_demangle (SYMBOL_NAME (symbol), \ |
| 187 | DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA); \ |
| 188 | if (demangled != NULL) \ |
| 189 | { \ |
| 190 | SYMBOL_LANGUAGE (symbol) = language_java; \ |
| 191 | SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = \ |
| 192 | obsavestring (demangled, strlen (demangled), (obstack)); \ |
| 193 | free (demangled); \ |
| 194 | } \ |
| 195 | else \ |
| 196 | { \ |
| 197 | SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = NULL; \ |
| 198 | } \ |
| 199 | } \ |
| 200 | if (demangled == NULL \ |
| 201 | && (SYMBOL_LANGUAGE (symbol) == language_chill \ |
| 202 | || SYMBOL_LANGUAGE (symbol) == language_auto)) \ |
| 203 | { \ |
| 204 | demangled = \ |
| 205 | chill_demangle (SYMBOL_NAME (symbol)); \ |
| 206 | if (demangled != NULL) \ |
| 207 | { \ |
| 208 | SYMBOL_LANGUAGE (symbol) = language_chill; \ |
| 209 | SYMBOL_CHILL_DEMANGLED_NAME (symbol) = \ |
| 210 | obsavestring (demangled, strlen (demangled), (obstack)); \ |
| 211 | free (demangled); \ |
| 212 | } \ |
| 213 | else \ |
| 214 | { \ |
| 215 | SYMBOL_CHILL_DEMANGLED_NAME (symbol) = NULL; \ |
| 216 | } \ |
| 217 | } \ |
| 218 | if (SYMBOL_LANGUAGE (symbol) == language_auto) \ |
| 219 | { \ |
| 220 | SYMBOL_LANGUAGE (symbol) = language_unknown; \ |
| 221 | } \ |
| 222 | } while (0) |
| 223 | |
| 224 | /* Macro that returns the demangled name for a symbol based on the language |
| 225 | for that symbol. If no demangled name exists, returns NULL. */ |
| 226 | |
| 227 | #define SYMBOL_DEMANGLED_NAME(symbol) \ |
| 228 | (SYMBOL_LANGUAGE (symbol) == language_cplus \ |
| 229 | || SYMBOL_LANGUAGE (symbol) == language_java \ |
| 230 | ? SYMBOL_CPLUS_DEMANGLED_NAME (symbol) \ |
| 231 | : (SYMBOL_LANGUAGE (symbol) == language_chill \ |
| 232 | ? SYMBOL_CHILL_DEMANGLED_NAME (symbol) \ |
| 233 | : NULL)) |
| 234 | |
| 235 | #define SYMBOL_CHILL_DEMANGLED_NAME(symbol) \ |
| 236 | (symbol)->ginfo.language_specific.chill_specific.demangled_name |
| 237 | |
| 238 | /* Macro that returns the "natural source name" of a symbol. In C++ this is |
| 239 | the "demangled" form of the name if demangle is on and the "mangled" form |
| 240 | of the name if demangle is off. In other languages this is just the |
| 241 | symbol name. The result should never be NULL. */ |
| 242 | |
| 243 | #define SYMBOL_SOURCE_NAME(symbol) \ |
| 244 | (demangle && SYMBOL_DEMANGLED_NAME (symbol) != NULL \ |
| 245 | ? SYMBOL_DEMANGLED_NAME (symbol) \ |
| 246 | : SYMBOL_NAME (symbol)) |
| 247 | |
| 248 | /* Macro that returns the "natural assembly name" of a symbol. In C++ this is |
| 249 | the "mangled" form of the name if demangle is off, or if demangle is on and |
| 250 | asm_demangle is off. Otherwise if asm_demangle is on it is the "demangled" |
| 251 | form. In other languages this is just the symbol name. The result should |
| 252 | never be NULL. */ |
| 253 | |
| 254 | #define SYMBOL_LINKAGE_NAME(symbol) \ |
| 255 | (demangle && asm_demangle && SYMBOL_DEMANGLED_NAME (symbol) != NULL \ |
| 256 | ? SYMBOL_DEMANGLED_NAME (symbol) \ |
| 257 | : SYMBOL_NAME (symbol)) |
| 258 | |
| 259 | /* Macro that tests a symbol for a match against a specified name string. |
| 260 | First test the unencoded name, then looks for and test a C++ encoded |
| 261 | name if it exists. Note that whitespace is ignored while attempting to |
| 262 | match a C++ encoded name, so that "foo::bar(int,long)" is the same as |
| 263 | "foo :: bar (int, long)". |
| 264 | Evaluates to zero if the match fails, or nonzero if it succeeds. */ |
| 265 | |
| 266 | #define SYMBOL_MATCHES_NAME(symbol, name) \ |
| 267 | (STREQ (SYMBOL_NAME (symbol), (name)) \ |
| 268 | || (SYMBOL_DEMANGLED_NAME (symbol) != NULL \ |
| 269 | && strcmp_iw (SYMBOL_DEMANGLED_NAME (symbol), (name)) == 0)) |
| 270 | |
| 271 | /* Macro that tests a symbol for an re-match against the last compiled regular |
| 272 | expression. First test the unencoded name, then look for and test a C++ |
| 273 | encoded name if it exists. |
| 274 | Evaluates to zero if the match fails, or nonzero if it succeeds. */ |
| 275 | |
| 276 | #define SYMBOL_MATCHES_REGEXP(symbol) \ |
| 277 | (re_exec (SYMBOL_NAME (symbol)) != 0 \ |
| 278 | || (SYMBOL_DEMANGLED_NAME (symbol) != NULL \ |
| 279 | && re_exec (SYMBOL_DEMANGLED_NAME (symbol)) != 0)) |
| 280 | |
| 281 | /* Define a simple structure used to hold some very basic information about |
| 282 | all defined global symbols (text, data, bss, abs, etc). The only required |
| 283 | information is the general_symbol_info. |
| 284 | |
| 285 | In many cases, even if a file was compiled with no special options for |
| 286 | debugging at all, as long as was not stripped it will contain sufficient |
| 287 | information to build a useful minimal symbol table using this structure. |
| 288 | Even when a file contains enough debugging information to build a full |
| 289 | symbol table, these minimal symbols are still useful for quickly mapping |
| 290 | between names and addresses, and vice versa. They are also sometimes |
| 291 | used to figure out what full symbol table entries need to be read in. */ |
| 292 | |
| 293 | struct minimal_symbol |
| 294 | { |
| 295 | |
| 296 | /* The general symbol info required for all types of symbols. |
| 297 | |
| 298 | The SYMBOL_VALUE_ADDRESS contains the address that this symbol |
| 299 | corresponds to. */ |
| 300 | |
| 301 | struct general_symbol_info ginfo; |
| 302 | |
| 303 | /* The info field is available for caching machine-specific information that |
| 304 | The AMD 29000 tdep.c uses it to remember things it has decoded from the |
| 305 | instructions in the function header, so it doesn't have to rederive the |
| 306 | info constantly (over a serial line). It is initialized to zero and |
| 307 | stays that way until target-dependent code sets it. Storage for any data |
| 308 | pointed to by this field should be allocated on the symbol_obstack for |
| 309 | the associated objfile. The type would be "void *" except for reasons |
| 310 | of compatibility with older compilers. This field is optional. */ |
| 311 | |
| 312 | char *info; |
| 313 | |
| 314 | #ifdef SOFUN_ADDRESS_MAYBE_MISSING |
| 315 | /* Which source file is this symbol in? Only relevant for mst_file_*. */ |
| 316 | char *filename; |
| 317 | #endif |
| 318 | |
| 319 | /* Classification types for this symbol. These should be taken as "advisory |
| 320 | only", since if gdb can't easily figure out a classification it simply |
| 321 | selects mst_unknown. It may also have to guess when it can't figure out |
| 322 | which is a better match between two types (mst_data versus mst_bss) for |
| 323 | example. Since the minimal symbol info is sometimes derived from the |
| 324 | BFD library's view of a file, we need to live with what information bfd |
| 325 | supplies. */ |
| 326 | |
| 327 | enum minimal_symbol_type |
| 328 | { |
| 329 | mst_unknown = 0, /* Unknown type, the default */ |
| 330 | mst_text, /* Generally executable instructions */ |
| 331 | mst_data, /* Generally initialized data */ |
| 332 | mst_bss, /* Generally uninitialized data */ |
| 333 | mst_abs, /* Generally absolute (nonrelocatable) */ |
| 334 | /* GDB uses mst_solib_trampoline for the start address of a shared |
| 335 | library trampoline entry. Breakpoints for shared library functions |
| 336 | are put there if the shared library is not yet loaded. |
| 337 | After the shared library is loaded, lookup_minimal_symbol will |
| 338 | prefer the minimal symbol from the shared library (usually |
| 339 | a mst_text symbol) over the mst_solib_trampoline symbol, and the |
| 340 | breakpoints will be moved to their true address in the shared |
| 341 | library via breakpoint_re_set. */ |
| 342 | mst_solib_trampoline, /* Shared library trampoline code */ |
| 343 | /* For the mst_file* types, the names are only guaranteed to be unique |
| 344 | within a given .o file. */ |
| 345 | mst_file_text, /* Static version of mst_text */ |
| 346 | mst_file_data, /* Static version of mst_data */ |
| 347 | mst_file_bss /* Static version of mst_bss */ |
| 348 | } type BYTE_BITFIELD; |
| 349 | }; |
| 350 | |
| 351 | #define MSYMBOL_INFO(msymbol) (msymbol)->info |
| 352 | #define MSYMBOL_TYPE(msymbol) (msymbol)->type |
| 353 | |
| 354 | \f |
| 355 | /* All of the name-scope contours of the program |
| 356 | are represented by `struct block' objects. |
| 357 | All of these objects are pointed to by the blockvector. |
| 358 | |
| 359 | Each block represents one name scope. |
| 360 | Each lexical context has its own block. |
| 361 | |
| 362 | The blockvector begins with some special blocks. |
| 363 | The GLOBAL_BLOCK contains all the symbols defined in this compilation |
| 364 | whose scope is the entire program linked together. |
| 365 | The STATIC_BLOCK contains all the symbols whose scope is the |
| 366 | entire compilation excluding other separate compilations. |
| 367 | Blocks starting with the FIRST_LOCAL_BLOCK are not special. |
| 368 | |
| 369 | Each block records a range of core addresses for the code that |
| 370 | is in the scope of the block. The STATIC_BLOCK and GLOBAL_BLOCK |
| 371 | give, for the range of code, the entire range of code produced |
| 372 | by the compilation that the symbol segment belongs to. |
| 373 | |
| 374 | The blocks appear in the blockvector |
| 375 | in order of increasing starting-address, |
| 376 | and, within that, in order of decreasing ending-address. |
| 377 | |
| 378 | This implies that within the body of one function |
| 379 | the blocks appear in the order of a depth-first tree walk. */ |
| 380 | |
| 381 | struct blockvector |
| 382 | { |
| 383 | /* Number of blocks in the list. */ |
| 384 | int nblocks; |
| 385 | /* The blocks themselves. */ |
| 386 | struct block *block[1]; |
| 387 | }; |
| 388 | |
| 389 | #define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks |
| 390 | #define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n] |
| 391 | |
| 392 | /* Special block numbers */ |
| 393 | |
| 394 | #define GLOBAL_BLOCK 0 |
| 395 | #define STATIC_BLOCK 1 |
| 396 | #define FIRST_LOCAL_BLOCK 2 |
| 397 | |
| 398 | struct block |
| 399 | { |
| 400 | |
| 401 | /* Addresses in the executable code that are in this block. */ |
| 402 | |
| 403 | CORE_ADDR startaddr; |
| 404 | CORE_ADDR endaddr; |
| 405 | |
| 406 | /* The symbol that names this block, if the block is the body of a |
| 407 | function; otherwise, zero. */ |
| 408 | |
| 409 | struct symbol *function; |
| 410 | |
| 411 | /* The `struct block' for the containing block, or 0 if none. |
| 412 | |
| 413 | The superblock of a top-level local block (i.e. a function in the |
| 414 | case of C) is the STATIC_BLOCK. The superblock of the |
| 415 | STATIC_BLOCK is the GLOBAL_BLOCK. */ |
| 416 | |
| 417 | struct block *superblock; |
| 418 | |
| 419 | /* Version of GCC used to compile the function corresponding |
| 420 | to this block, or 0 if not compiled with GCC. When possible, |
| 421 | GCC should be compatible with the native compiler, or if that |
| 422 | is not feasible, the differences should be fixed during symbol |
| 423 | reading. As of 16 Apr 93, this flag is never used to distinguish |
| 424 | between gcc2 and the native compiler. |
| 425 | |
| 426 | If there is no function corresponding to this block, this meaning |
| 427 | of this flag is undefined. */ |
| 428 | |
| 429 | unsigned char gcc_compile_flag; |
| 430 | |
| 431 | /* Number of local symbols. */ |
| 432 | |
| 433 | int nsyms; |
| 434 | |
| 435 | /* The symbols. If some of them are arguments, then they must be |
| 436 | in the order in which we would like to print them. */ |
| 437 | |
| 438 | struct symbol *sym[1]; |
| 439 | }; |
| 440 | |
| 441 | #define BLOCK_START(bl) (bl)->startaddr |
| 442 | #define BLOCK_END(bl) (bl)->endaddr |
| 443 | #define BLOCK_NSYMS(bl) (bl)->nsyms |
| 444 | #define BLOCK_SYM(bl, n) (bl)->sym[n] |
| 445 | #define BLOCK_FUNCTION(bl) (bl)->function |
| 446 | #define BLOCK_SUPERBLOCK(bl) (bl)->superblock |
| 447 | #define BLOCK_GCC_COMPILED(bl) (bl)->gcc_compile_flag |
| 448 | |
| 449 | /* Nonzero if symbols of block BL should be sorted alphabetically. |
| 450 | Don't sort a block which corresponds to a function. If we did the |
| 451 | sorting would have to preserve the order of the symbols for the |
| 452 | arguments. */ |
| 453 | |
| 454 | #define BLOCK_SHOULD_SORT(bl) ((bl)->nsyms >= 40 && BLOCK_FUNCTION (bl) == NULL) |
| 455 | |
| 456 | \f |
| 457 | /* Represent one symbol name; a variable, constant, function or typedef. */ |
| 458 | |
| 459 | /* Different name spaces for symbols. Looking up a symbol specifies a |
| 460 | namespace and ignores symbol definitions in other name spaces. */ |
| 461 | |
| 462 | typedef enum |
| 463 | { |
| 464 | /* UNDEF_NAMESPACE is used when a namespace has not been discovered or |
| 465 | none of the following apply. This usually indicates an error either |
| 466 | in the symbol information or in gdb's handling of symbols. */ |
| 467 | |
| 468 | UNDEF_NAMESPACE, |
| 469 | |
| 470 | /* VAR_NAMESPACE is the usual namespace. In C, this contains variables, |
| 471 | function names, typedef names and enum type values. */ |
| 472 | |
| 473 | VAR_NAMESPACE, |
| 474 | |
| 475 | /* STRUCT_NAMESPACE is used in C to hold struct, union and enum type names. |
| 476 | Thus, if `struct foo' is used in a C program, it produces a symbol named |
| 477 | `foo' in the STRUCT_NAMESPACE. */ |
| 478 | |
| 479 | STRUCT_NAMESPACE, |
| 480 | |
| 481 | /* LABEL_NAMESPACE may be used for names of labels (for gotos); |
| 482 | currently it is not used and labels are not recorded at all. */ |
| 483 | |
| 484 | LABEL_NAMESPACE |
| 485 | } namespace_enum; |
| 486 | |
| 487 | /* An address-class says where to find the value of a symbol. */ |
| 488 | |
| 489 | enum address_class |
| 490 | { |
| 491 | /* Not used; catches errors */ |
| 492 | |
| 493 | LOC_UNDEF, |
| 494 | |
| 495 | /* Value is constant int SYMBOL_VALUE, host byteorder */ |
| 496 | |
| 497 | LOC_CONST, |
| 498 | |
| 499 | /* Value is at fixed address SYMBOL_VALUE_ADDRESS */ |
| 500 | |
| 501 | LOC_STATIC, |
| 502 | |
| 503 | /* Value is in register. SYMBOL_VALUE is the register number. */ |
| 504 | |
| 505 | LOC_REGISTER, |
| 506 | |
| 507 | /* It's an argument; the value is at SYMBOL_VALUE offset in arglist. */ |
| 508 | |
| 509 | LOC_ARG, |
| 510 | |
| 511 | /* Value address is at SYMBOL_VALUE offset in arglist. */ |
| 512 | |
| 513 | LOC_REF_ARG, |
| 514 | |
| 515 | /* Value is in register number SYMBOL_VALUE. Just like LOC_REGISTER |
| 516 | except this is an argument. Probably the cleaner way to handle |
| 517 | this would be to separate address_class (which would include |
| 518 | separate ARG and LOCAL to deal with FRAME_ARGS_ADDRESS versus |
| 519 | FRAME_LOCALS_ADDRESS), and an is_argument flag. |
| 520 | |
| 521 | For some symbol formats (stabs, for some compilers at least), |
| 522 | the compiler generates two symbols, an argument and a register. |
| 523 | In some cases we combine them to a single LOC_REGPARM in symbol |
| 524 | reading, but currently not for all cases (e.g. it's passed on the |
| 525 | stack and then loaded into a register). */ |
| 526 | |
| 527 | LOC_REGPARM, |
| 528 | |
| 529 | /* Value is in specified register. Just like LOC_REGPARM except the |
| 530 | register holds the address of the argument instead of the argument |
| 531 | itself. This is currently used for the passing of structs and unions |
| 532 | on sparc and hppa. It is also used for call by reference where the |
| 533 | address is in a register, at least by mipsread.c. */ |
| 534 | |
| 535 | LOC_REGPARM_ADDR, |
| 536 | |
| 537 | /* Value is a local variable at SYMBOL_VALUE offset in stack frame. */ |
| 538 | |
| 539 | LOC_LOCAL, |
| 540 | |
| 541 | /* Value not used; definition in SYMBOL_TYPE. Symbols in the namespace |
| 542 | STRUCT_NAMESPACE all have this class. */ |
| 543 | |
| 544 | LOC_TYPEDEF, |
| 545 | |
| 546 | /* Value is address SYMBOL_VALUE_ADDRESS in the code */ |
| 547 | |
| 548 | LOC_LABEL, |
| 549 | |
| 550 | /* In a symbol table, value is SYMBOL_BLOCK_VALUE of a `struct block'. |
| 551 | In a partial symbol table, SYMBOL_VALUE_ADDRESS is the start address |
| 552 | of the block. Function names have this class. */ |
| 553 | |
| 554 | LOC_BLOCK, |
| 555 | |
| 556 | /* Value is a constant byte-sequence pointed to by SYMBOL_VALUE_BYTES, in |
| 557 | target byte order. */ |
| 558 | |
| 559 | LOC_CONST_BYTES, |
| 560 | |
| 561 | /* Value is arg at SYMBOL_VALUE offset in stack frame. Differs from |
| 562 | LOC_LOCAL in that symbol is an argument; differs from LOC_ARG in |
| 563 | that we find it in the frame (FRAME_LOCALS_ADDRESS), not in the |
| 564 | arglist (FRAME_ARGS_ADDRESS). Added for i960, which passes args |
| 565 | in regs then copies to frame. */ |
| 566 | |
| 567 | LOC_LOCAL_ARG, |
| 568 | |
| 569 | /* Value is at SYMBOL_VALUE offset from the current value of |
| 570 | register number SYMBOL_BASEREG. This exists mainly for the same |
| 571 | things that LOC_LOCAL and LOC_ARG do; but we need to do this |
| 572 | instead because on 88k DWARF gives us the offset from the |
| 573 | frame/stack pointer, rather than the offset from the "canonical |
| 574 | frame address" used by COFF, stabs, etc., and we don't know how |
| 575 | to convert between these until we start examining prologues. |
| 576 | |
| 577 | Note that LOC_BASEREG is much less general than a DWARF expression. |
| 578 | We don't need the generality (at least not yet), and storing a general |
| 579 | DWARF expression would presumably take up more space than the existing |
| 580 | scheme. */ |
| 581 | |
| 582 | LOC_BASEREG, |
| 583 | |
| 584 | /* Same as LOC_BASEREG but it is an argument. */ |
| 585 | |
| 586 | LOC_BASEREG_ARG, |
| 587 | |
| 588 | /* Value is at fixed address, but the address of the variable has |
| 589 | to be determined from the minimal symbol table whenever the |
| 590 | variable is referenced. |
| 591 | This happens if debugging information for a global symbol is |
| 592 | emitted and the corresponding minimal symbol is defined |
| 593 | in another object file or runtime common storage. |
| 594 | The linker might even remove the minimal symbol if the global |
| 595 | symbol is never referenced, in which case the symbol remains |
| 596 | unresolved. */ |
| 597 | |
| 598 | LOC_UNRESOLVED, |
| 599 | |
| 600 | /* The variable does not actually exist in the program. |
| 601 | The value is ignored. */ |
| 602 | |
| 603 | LOC_OPTIMIZED_OUT |
| 604 | }; |
| 605 | |
| 606 | /* Linked list of symbol's live ranges. */ |
| 607 | |
| 608 | struct live_range |
| 609 | { |
| 610 | CORE_ADDR start; |
| 611 | CORE_ADDR end; |
| 612 | struct live_range *next; |
| 613 | }; |
| 614 | |
| 615 | struct symbol |
| 616 | { |
| 617 | |
| 618 | /* The general symbol info required for all types of symbols. */ |
| 619 | |
| 620 | struct general_symbol_info ginfo; |
| 621 | |
| 622 | /* Data type of value */ |
| 623 | |
| 624 | struct type *type; |
| 625 | |
| 626 | /* Name space code. */ |
| 627 | |
| 628 | #ifdef __MFC4__ |
| 629 | /* FIXME: don't conflict with C++'s namespace */ |
| 630 | /* would be safer to do a global change for all namespace identifiers. */ |
| 631 | #define namespace _namespace |
| 632 | #endif |
| 633 | namespace_enum namespace BYTE_BITFIELD; |
| 634 | |
| 635 | /* Address class */ |
| 636 | |
| 637 | enum address_class aclass BYTE_BITFIELD; |
| 638 | |
| 639 | /* Line number of definition. FIXME: Should we really make the assumption |
| 640 | that nobody will try to debug files longer than 64K lines? What about |
| 641 | machine generated programs? */ |
| 642 | |
| 643 | unsigned short line; |
| 644 | |
| 645 | /* Some symbols require an additional value to be recorded on a per- |
| 646 | symbol basis. Stash those values here. */ |
| 647 | |
| 648 | union |
| 649 | { |
| 650 | /* Used by LOC_BASEREG and LOC_BASEREG_ARG. */ |
| 651 | short basereg; |
| 652 | } |
| 653 | aux_value; |
| 654 | |
| 655 | /* Live range information (if present) for debugging of optimized code. |
| 656 | Gcc extensions were added to stabs to encode live range information. |
| 657 | The syntax for referencing (defining) symbol aliases is "#n" ("#n=") |
| 658 | where n is a number. The syntax for specifying a range is "l(#<m>,#<n>)", |
| 659 | where m and n are numbers. |
| 660 | aliases - list of other symbols which are lexically the same symbol, |
| 661 | but were optimized into different storage classes (eg. for the |
| 662 | local symbol "x", one symbol contains range information where x |
| 663 | is on the stack, while an alias contains the live ranges where x |
| 664 | is in a register). |
| 665 | range - list of instruction ranges where the symbol is live. */ |
| 666 | struct live_range_info |
| 667 | { |
| 668 | struct symbol *aliases; /* Link to other aliases for this symbol. */ |
| 669 | struct live_range *range; /* Linked list of live ranges. */ |
| 670 | } live; |
| 671 | }; |
| 672 | |
| 673 | #define SYMBOL_NAMESPACE(symbol) (symbol)->namespace |
| 674 | #define SYMBOL_CLASS(symbol) (symbol)->aclass |
| 675 | #define SYMBOL_TYPE(symbol) (symbol)->type |
| 676 | #define SYMBOL_LINE(symbol) (symbol)->line |
| 677 | #define SYMBOL_BASEREG(symbol) (symbol)->aux_value.basereg |
| 678 | #define SYMBOL_ALIASES(symbol) (symbol)->live.aliases |
| 679 | #define SYMBOL_RANGE(symbol) (symbol)->live.range |
| 680 | #define SYMBOL_RANGE_START(symbol) (symbol)->live.range->start |
| 681 | #define SYMBOL_RANGE_END(symbol) (symbol)->live.range->end |
| 682 | #define SYMBOL_RANGE_NEXT(symbol) (symbol)->live.range->next |
| 683 | \f |
| 684 | /* A partial_symbol records the name, namespace, and address class of |
| 685 | symbols whose types we have not parsed yet. For functions, it also |
| 686 | contains their memory address, so we can find them from a PC value. |
| 687 | Each partial_symbol sits in a partial_symtab, all of which are chained |
| 688 | on a partial symtab list and which points to the corresponding |
| 689 | normal symtab once the partial_symtab has been referenced. */ |
| 690 | |
| 691 | struct partial_symbol |
| 692 | { |
| 693 | |
| 694 | /* The general symbol info required for all types of symbols. */ |
| 695 | |
| 696 | struct general_symbol_info ginfo; |
| 697 | |
| 698 | /* Name space code. */ |
| 699 | |
| 700 | namespace_enum namespace BYTE_BITFIELD; |
| 701 | |
| 702 | /* Address class (for info_symbols) */ |
| 703 | |
| 704 | enum address_class aclass BYTE_BITFIELD; |
| 705 | |
| 706 | }; |
| 707 | |
| 708 | #define PSYMBOL_NAMESPACE(psymbol) (psymbol)->namespace |
| 709 | #define PSYMBOL_CLASS(psymbol) (psymbol)->aclass |
| 710 | |
| 711 | \f |
| 712 | /* Source-file information. This describes the relation between source files, |
| 713 | ine numbers and addresses in the program text. */ |
| 714 | |
| 715 | struct sourcevector |
| 716 | { |
| 717 | int length; /* Number of source files described */ |
| 718 | struct source *source[1]; /* Descriptions of the files */ |
| 719 | }; |
| 720 | |
| 721 | /* Each item represents a line-->pc (or the reverse) mapping. This is |
| 722 | somewhat more wasteful of space than one might wish, but since only |
| 723 | the files which are actually debugged are read in to core, we don't |
| 724 | waste much space. */ |
| 725 | |
| 726 | struct linetable_entry |
| 727 | { |
| 728 | int line; |
| 729 | CORE_ADDR pc; |
| 730 | }; |
| 731 | |
| 732 | /* The order of entries in the linetable is significant. They should |
| 733 | be sorted by increasing values of the pc field. If there is more than |
| 734 | one entry for a given pc, then I'm not sure what should happen (and |
| 735 | I not sure whether we currently handle it the best way). |
| 736 | |
| 737 | Example: a C for statement generally looks like this |
| 738 | |
| 739 | 10 0x100 - for the init/test part of a for stmt. |
| 740 | 20 0x200 |
| 741 | 30 0x300 |
| 742 | 10 0x400 - for the increment part of a for stmt. |
| 743 | |
| 744 | */ |
| 745 | |
| 746 | struct linetable |
| 747 | { |
| 748 | int nitems; |
| 749 | |
| 750 | /* Actually NITEMS elements. If you don't like this use of the |
| 751 | `struct hack', you can shove it up your ANSI (seriously, if the |
| 752 | committee tells us how to do it, we can probably go along). */ |
| 753 | struct linetable_entry item[1]; |
| 754 | }; |
| 755 | |
| 756 | /* All the information on one source file. */ |
| 757 | |
| 758 | struct source |
| 759 | { |
| 760 | char *name; /* Name of file */ |
| 761 | struct linetable contents; |
| 762 | }; |
| 763 | |
| 764 | /* How to relocate the symbols from each section in a symbol file. |
| 765 | Each struct contains an array of offsets. |
| 766 | The ordering and meaning of the offsets is file-type-dependent; |
| 767 | typically it is indexed by section numbers or symbol types or |
| 768 | something like that. |
| 769 | |
| 770 | To give us flexibility in changing the internal representation |
| 771 | of these offsets, the ANOFFSET macro must be used to insert and |
| 772 | extract offset values in the struct. */ |
| 773 | |
| 774 | struct section_offsets |
| 775 | { |
| 776 | CORE_ADDR offsets[1]; /* As many as needed. */ |
| 777 | }; |
| 778 | |
| 779 | #define ANOFFSET(secoff, whichone) (secoff->offsets[whichone]) |
| 780 | |
| 781 | /* The maximum possible size of a section_offsets table. */ |
| 782 | |
| 783 | #define SIZEOF_SECTION_OFFSETS \ |
| 784 | (sizeof (struct section_offsets) \ |
| 785 | + sizeof (((struct section_offsets *) 0)->offsets) * (SECT_OFF_MAX-1)) |
| 786 | |
| 787 | |
| 788 | /* Each source file or header is represented by a struct symtab. |
| 789 | These objects are chained through the `next' field. */ |
| 790 | |
| 791 | struct symtab |
| 792 | { |
| 793 | |
| 794 | /* Chain of all existing symtabs. */ |
| 795 | |
| 796 | struct symtab *next; |
| 797 | |
| 798 | /* List of all symbol scope blocks for this symtab. May be shared |
| 799 | between different symtabs (and normally is for all the symtabs |
| 800 | in a given compilation unit). */ |
| 801 | |
| 802 | struct blockvector *blockvector; |
| 803 | |
| 804 | /* Table mapping core addresses to line numbers for this file. |
| 805 | Can be NULL if none. Never shared between different symtabs. */ |
| 806 | |
| 807 | struct linetable *linetable; |
| 808 | |
| 809 | /* Section in objfile->section_offsets for the blockvector and |
| 810 | the linetable. Probably always SECT_OFF_TEXT. */ |
| 811 | |
| 812 | int block_line_section; |
| 813 | |
| 814 | /* If several symtabs share a blockvector, exactly one of them |
| 815 | should be designed the primary, so that the blockvector |
| 816 | is relocated exactly once by objfile_relocate. */ |
| 817 | |
| 818 | int primary; |
| 819 | |
| 820 | /* Name of this source file. */ |
| 821 | |
| 822 | char *filename; |
| 823 | |
| 824 | /* Directory in which it was compiled, or NULL if we don't know. */ |
| 825 | |
| 826 | char *dirname; |
| 827 | |
| 828 | /* This component says how to free the data we point to: |
| 829 | free_contents => do a tree walk and free each object. |
| 830 | free_nothing => do nothing; some other symtab will free |
| 831 | the data this one uses. |
| 832 | free_linetable => free just the linetable. FIXME: Is this redundant |
| 833 | with the primary field? */ |
| 834 | |
| 835 | enum free_code |
| 836 | { |
| 837 | free_nothing, free_contents, free_linetable |
| 838 | } |
| 839 | free_code; |
| 840 | |
| 841 | /* Pointer to one block of storage to be freed, if nonzero. */ |
| 842 | /* This is IN ADDITION to the action indicated by free_code. */ |
| 843 | |
| 844 | char *free_ptr; |
| 845 | |
| 846 | /* Total number of lines found in source file. */ |
| 847 | |
| 848 | int nlines; |
| 849 | |
| 850 | /* line_charpos[N] is the position of the (N-1)th line of the |
| 851 | source file. "position" means something we can lseek() to; it |
| 852 | is not guaranteed to be useful any other way. */ |
| 853 | |
| 854 | int *line_charpos; |
| 855 | |
| 856 | /* Language of this source file. */ |
| 857 | |
| 858 | enum language language; |
| 859 | |
| 860 | /* String that identifies the format of the debugging information, such |
| 861 | as "stabs", "dwarf 1", "dwarf 2", "coff", etc. This is mostly useful |
| 862 | for automated testing of gdb but may also be information that is |
| 863 | useful to the user. */ |
| 864 | |
| 865 | char *debugformat; |
| 866 | |
| 867 | /* String of version information. May be zero. */ |
| 868 | |
| 869 | char *version; |
| 870 | |
| 871 | /* Full name of file as found by searching the source path. |
| 872 | NULL if not yet known. */ |
| 873 | |
| 874 | char *fullname; |
| 875 | |
| 876 | /* Object file from which this symbol information was read. */ |
| 877 | |
| 878 | struct objfile *objfile; |
| 879 | |
| 880 | /* Anything extra for this symtab. This is for target machines |
| 881 | with special debugging info of some sort (which cannot just |
| 882 | be represented in a normal symtab). */ |
| 883 | |
| 884 | #if defined (EXTRA_SYMTAB_INFO) |
| 885 | EXTRA_SYMTAB_INFO |
| 886 | #endif |
| 887 | |
| 888 | }; |
| 889 | |
| 890 | #define BLOCKVECTOR(symtab) (symtab)->blockvector |
| 891 | #define LINETABLE(symtab) (symtab)->linetable |
| 892 | |
| 893 | \f |
| 894 | /* Each source file that has not been fully read in is represented by |
| 895 | a partial_symtab. This contains the information on where in the |
| 896 | executable the debugging symbols for a specific file are, and a |
| 897 | list of names of global symbols which are located in this file. |
| 898 | They are all chained on partial symtab lists. |
| 899 | |
| 900 | Even after the source file has been read into a symtab, the |
| 901 | partial_symtab remains around. They are allocated on an obstack, |
| 902 | psymbol_obstack. FIXME, this is bad for dynamic linking or VxWorks- |
| 903 | style execution of a bunch of .o's. */ |
| 904 | |
| 905 | struct partial_symtab |
| 906 | { |
| 907 | |
| 908 | /* Chain of all existing partial symtabs. */ |
| 909 | |
| 910 | struct partial_symtab *next; |
| 911 | |
| 912 | /* Name of the source file which this partial_symtab defines */ |
| 913 | |
| 914 | char *filename; |
| 915 | |
| 916 | /* Information about the object file from which symbols should be read. */ |
| 917 | |
| 918 | struct objfile *objfile; |
| 919 | |
| 920 | /* Set of relocation offsets to apply to each section. */ |
| 921 | |
| 922 | struct section_offsets *section_offsets; |
| 923 | |
| 924 | /* Range of text addresses covered by this file; texthigh is the |
| 925 | beginning of the next section. */ |
| 926 | |
| 927 | CORE_ADDR textlow; |
| 928 | CORE_ADDR texthigh; |
| 929 | |
| 930 | /* Array of pointers to all of the partial_symtab's which this one |
| 931 | depends on. Since this array can only be set to previous or |
| 932 | the current (?) psymtab, this dependency tree is guaranteed not |
| 933 | to have any loops. "depends on" means that symbols must be read |
| 934 | for the dependencies before being read for this psymtab; this is |
| 935 | for type references in stabs, where if foo.c includes foo.h, declarations |
| 936 | in foo.h may use type numbers defined in foo.c. For other debugging |
| 937 | formats there may be no need to use dependencies. */ |
| 938 | |
| 939 | struct partial_symtab **dependencies; |
| 940 | |
| 941 | int number_of_dependencies; |
| 942 | |
| 943 | /* Global symbol list. This list will be sorted after readin to |
| 944 | improve access. Binary search will be the usual method of |
| 945 | finding a symbol within it. globals_offset is an integer offset |
| 946 | within global_psymbols[]. */ |
| 947 | |
| 948 | int globals_offset; |
| 949 | int n_global_syms; |
| 950 | |
| 951 | /* Static symbol list. This list will *not* be sorted after readin; |
| 952 | to find a symbol in it, exhaustive search must be used. This is |
| 953 | reasonable because searches through this list will eventually |
| 954 | lead to either the read in of a files symbols for real (assumed |
| 955 | to take a *lot* of time; check) or an error (and we don't care |
| 956 | how long errors take). This is an offset and size within |
| 957 | static_psymbols[]. */ |
| 958 | |
| 959 | int statics_offset; |
| 960 | int n_static_syms; |
| 961 | |
| 962 | /* Pointer to symtab eventually allocated for this source file, 0 if |
| 963 | !readin or if we haven't looked for the symtab after it was readin. */ |
| 964 | |
| 965 | struct symtab *symtab; |
| 966 | |
| 967 | /* Pointer to function which will read in the symtab corresponding to |
| 968 | this psymtab. */ |
| 969 | |
| 970 | void (*read_symtab) PARAMS ((struct partial_symtab *)); |
| 971 | |
| 972 | /* Information that lets read_symtab() locate the part of the symbol table |
| 973 | that this psymtab corresponds to. This information is private to the |
| 974 | format-dependent symbol reading routines. For further detail examine |
| 975 | the various symbol reading modules. Should really be (void *) but is |
| 976 | (char *) as with other such gdb variables. (FIXME) */ |
| 977 | |
| 978 | char *read_symtab_private; |
| 979 | |
| 980 | /* Non-zero if the symtab corresponding to this psymtab has been readin */ |
| 981 | |
| 982 | unsigned char readin; |
| 983 | }; |
| 984 | |
| 985 | /* A fast way to get from a psymtab to its symtab (after the first time). */ |
| 986 | #define PSYMTAB_TO_SYMTAB(pst) \ |
| 987 | ((pst) -> symtab != NULL ? (pst) -> symtab : psymtab_to_symtab (pst)) |
| 988 | |
| 989 | \f |
| 990 | /* The virtual function table is now an array of structures which have the |
| 991 | form { int16 offset, delta; void *pfn; }. |
| 992 | |
| 993 | In normal virtual function tables, OFFSET is unused. |
| 994 | DELTA is the amount which is added to the apparent object's base |
| 995 | address in order to point to the actual object to which the |
| 996 | virtual function should be applied. |
| 997 | PFN is a pointer to the virtual function. |
| 998 | |
| 999 | Note that this macro is g++ specific (FIXME). */ |
| 1000 | |
| 1001 | #define VTBL_FNADDR_OFFSET 2 |
| 1002 | |
| 1003 | /* Macro that yields non-zero value iff NAME is the prefix for C++ operator |
| 1004 | names. If you leave out the parenthesis here you will lose! |
| 1005 | Currently 'o' 'p' CPLUS_MARKER is used for both the symbol in the |
| 1006 | symbol-file and the names in gdb's symbol table. |
| 1007 | Note that this macro is g++ specific (FIXME). */ |
| 1008 | |
| 1009 | #define OPNAME_PREFIX_P(NAME) \ |
| 1010 | ((NAME)[0] == 'o' && (NAME)[1] == 'p' && is_cplus_marker ((NAME)[2])) |
| 1011 | |
| 1012 | /* Macro that yields non-zero value iff NAME is the prefix for C++ vtbl |
| 1013 | names. Note that this macro is g++ specific (FIXME). |
| 1014 | '_vt$' is the old cfront-style vtables; '_VT$' is the new |
| 1015 | style, using thunks (where '$' is really CPLUS_MARKER). */ |
| 1016 | |
| 1017 | #define VTBL_PREFIX_P(NAME) \ |
| 1018 | ((NAME)[0] == '_' \ |
| 1019 | && (((NAME)[1] == 'V' && (NAME)[2] == 'T') \ |
| 1020 | || ((NAME)[1] == 'v' && (NAME)[2] == 't')) \ |
| 1021 | && is_cplus_marker ((NAME)[3])) |
| 1022 | |
| 1023 | /* Macro that yields non-zero value iff NAME is the prefix for C++ destructor |
| 1024 | names. Note that this macro is g++ specific (FIXME). */ |
| 1025 | |
| 1026 | #define DESTRUCTOR_PREFIX_P(NAME) \ |
| 1027 | ((NAME)[0] == '_' && is_cplus_marker ((NAME)[1]) && (NAME)[2] == '_') |
| 1028 | |
| 1029 | \f |
| 1030 | /* External variables and functions for the objects described above. */ |
| 1031 | |
| 1032 | /* This symtab variable specifies the current file for printing source lines */ |
| 1033 | |
| 1034 | extern struct symtab *current_source_symtab; |
| 1035 | |
| 1036 | /* This is the next line to print for listing source lines. */ |
| 1037 | |
| 1038 | extern int current_source_line; |
| 1039 | |
| 1040 | /* See the comment in symfile.c about how current_objfile is used. */ |
| 1041 | |
| 1042 | extern struct objfile *current_objfile; |
| 1043 | |
| 1044 | /* True if we are nested inside psymtab_to_symtab. */ |
| 1045 | |
| 1046 | extern int currently_reading_symtab; |
| 1047 | |
| 1048 | /* From utils.c. */ |
| 1049 | extern int demangle; |
| 1050 | extern int asm_demangle; |
| 1051 | |
| 1052 | /* symtab.c lookup functions */ |
| 1053 | |
| 1054 | /* lookup a symbol table by source file name */ |
| 1055 | |
| 1056 | extern struct symtab * |
| 1057 | lookup_symtab PARAMS ((char *)); |
| 1058 | |
| 1059 | /* lookup a symbol by name (optional block, optional symtab) */ |
| 1060 | |
| 1061 | extern struct symbol * |
| 1062 | lookup_symbol PARAMS ((const char *, const struct block *, |
| 1063 | const namespace_enum, int *, struct symtab **)); |
| 1064 | |
| 1065 | /* lookup a symbol by name, within a specified block */ |
| 1066 | |
| 1067 | extern struct symbol * |
| 1068 | lookup_block_symbol PARAMS ((const struct block *, const char *, |
| 1069 | const namespace_enum)); |
| 1070 | |
| 1071 | /* lookup a [struct, union, enum] by name, within a specified block */ |
| 1072 | |
| 1073 | extern struct type * |
| 1074 | lookup_struct PARAMS ((char *, struct block *)); |
| 1075 | |
| 1076 | extern struct type * |
| 1077 | lookup_union PARAMS ((char *, struct block *)); |
| 1078 | |
| 1079 | extern struct type * |
| 1080 | lookup_enum PARAMS ((char *, struct block *)); |
| 1081 | |
| 1082 | /* lookup the function corresponding to the block */ |
| 1083 | |
| 1084 | extern struct symbol * |
| 1085 | block_function PARAMS ((struct block *)); |
| 1086 | |
| 1087 | /* from blockframe.c: */ |
| 1088 | |
| 1089 | /* lookup the function symbol corresponding to the address */ |
| 1090 | |
| 1091 | extern struct symbol * |
| 1092 | find_pc_function PARAMS ((CORE_ADDR)); |
| 1093 | |
| 1094 | /* lookup the function corresponding to the address and section */ |
| 1095 | |
| 1096 | extern struct symbol * |
| 1097 | find_pc_sect_function PARAMS ((CORE_ADDR, asection *)); |
| 1098 | |
| 1099 | /* lookup function from address, return name, start addr and end addr */ |
| 1100 | |
| 1101 | extern int find_pc_partial_function PARAMS ((CORE_ADDR, char **, |
| 1102 | CORE_ADDR *, CORE_ADDR *)); |
| 1103 | |
| 1104 | extern void |
| 1105 | clear_pc_function_cache PARAMS ((void)); |
| 1106 | |
| 1107 | /* from symtab.c: */ |
| 1108 | |
| 1109 | /* lookup partial symbol table by filename */ |
| 1110 | |
| 1111 | extern struct partial_symtab * |
| 1112 | lookup_partial_symtab PARAMS ((char *)); |
| 1113 | |
| 1114 | /* lookup partial symbol table by address */ |
| 1115 | |
| 1116 | extern struct partial_symtab * |
| 1117 | find_pc_psymtab PARAMS ((CORE_ADDR)); |
| 1118 | |
| 1119 | /* lookup partial symbol table by address and section */ |
| 1120 | |
| 1121 | extern struct partial_symtab * |
| 1122 | find_pc_sect_psymtab PARAMS ((CORE_ADDR, asection *)); |
| 1123 | |
| 1124 | /* lookup full symbol table by address */ |
| 1125 | |
| 1126 | extern struct symtab * |
| 1127 | find_pc_symtab PARAMS ((CORE_ADDR)); |
| 1128 | |
| 1129 | /* lookup full symbol table by address and section */ |
| 1130 | |
| 1131 | extern struct symtab * |
| 1132 | find_pc_sect_symtab PARAMS ((CORE_ADDR, asection *)); |
| 1133 | |
| 1134 | /* lookup partial symbol by address */ |
| 1135 | |
| 1136 | extern struct partial_symbol * |
| 1137 | find_pc_psymbol PARAMS ((struct partial_symtab *, CORE_ADDR)); |
| 1138 | |
| 1139 | /* lookup partial symbol by address and section */ |
| 1140 | |
| 1141 | extern struct partial_symbol * |
| 1142 | find_pc_sect_psymbol PARAMS ((struct partial_symtab *, CORE_ADDR, asection *)); |
| 1143 | |
| 1144 | extern int |
| 1145 | find_pc_line_pc_range PARAMS ((CORE_ADDR, CORE_ADDR *, CORE_ADDR *)); |
| 1146 | |
| 1147 | extern int |
| 1148 | contained_in PARAMS ((struct block *, struct block *)); |
| 1149 | |
| 1150 | extern void |
| 1151 | reread_symbols PARAMS ((void)); |
| 1152 | |
| 1153 | /* Macro for name of symbol to indicate a file compiled with gcc. */ |
| 1154 | #ifndef GCC_COMPILED_FLAG_SYMBOL |
| 1155 | #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled." |
| 1156 | #endif |
| 1157 | |
| 1158 | /* Macro for name of symbol to indicate a file compiled with gcc2. */ |
| 1159 | #ifndef GCC2_COMPILED_FLAG_SYMBOL |
| 1160 | #define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled." |
| 1161 | #endif |
| 1162 | |
| 1163 | /* Functions for dealing with the minimal symbol table, really a misc |
| 1164 | address<->symbol mapping for things we don't have debug symbols for. */ |
| 1165 | |
| 1166 | extern void prim_record_minimal_symbol PARAMS ((const char *, CORE_ADDR, |
| 1167 | enum minimal_symbol_type, |
| 1168 | struct objfile *)); |
| 1169 | |
| 1170 | extern struct minimal_symbol *prim_record_minimal_symbol_and_info |
| 1171 | PARAMS ((const char *, CORE_ADDR, |
| 1172 | enum minimal_symbol_type, |
| 1173 | char *info, int section, |
| 1174 | asection *bfd_section, |
| 1175 | struct objfile *)); |
| 1176 | |
| 1177 | #ifdef SOFUN_ADDRESS_MAYBE_MISSING |
| 1178 | extern CORE_ADDR find_stab_function_addr PARAMS ((char *, |
| 1179 | struct partial_symtab *, |
| 1180 | struct objfile *)); |
| 1181 | #endif |
| 1182 | |
| 1183 | extern struct minimal_symbol * |
| 1184 | lookup_minimal_symbol PARAMS ((const char *, const char *, struct objfile *)); |
| 1185 | |
| 1186 | extern struct minimal_symbol * |
| 1187 | lookup_minimal_symbol_text PARAMS ((const char *, const char *, struct objfile *)); |
| 1188 | |
| 1189 | struct minimal_symbol * |
| 1190 | lookup_minimal_symbol_solib_trampoline PARAMS ((const char *, |
| 1191 | const char *, |
| 1192 | struct objfile *)); |
| 1193 | |
| 1194 | extern struct minimal_symbol * |
| 1195 | lookup_minimal_symbol_by_pc PARAMS ((CORE_ADDR)); |
| 1196 | |
| 1197 | extern struct minimal_symbol * |
| 1198 | lookup_minimal_symbol_by_pc_section PARAMS ((CORE_ADDR, asection *)); |
| 1199 | |
| 1200 | extern struct minimal_symbol * |
| 1201 | lookup_solib_trampoline_symbol_by_pc PARAMS ((CORE_ADDR)); |
| 1202 | |
| 1203 | extern CORE_ADDR |
| 1204 | find_solib_trampoline_target PARAMS ((CORE_ADDR)); |
| 1205 | |
| 1206 | extern void |
| 1207 | init_minimal_symbol_collection PARAMS ((void)); |
| 1208 | |
| 1209 | extern void |
| 1210 | discard_minimal_symbols PARAMS ((int)); |
| 1211 | |
| 1212 | extern void |
| 1213 | install_minimal_symbols PARAMS ((struct objfile *)); |
| 1214 | |
| 1215 | /* Sort all the minimal symbols in OBJFILE. */ |
| 1216 | |
| 1217 | extern void msymbols_sort PARAMS ((struct objfile *objfile)); |
| 1218 | |
| 1219 | struct symtab_and_line |
| 1220 | { |
| 1221 | struct symtab *symtab; |
| 1222 | asection *section; |
| 1223 | /* Line number. Line numbers start at 1 and proceed through symtab->nlines. |
| 1224 | 0 is never a valid line number; it is used to indicate that line number |
| 1225 | information is not available. */ |
| 1226 | int line; |
| 1227 | |
| 1228 | CORE_ADDR pc; |
| 1229 | CORE_ADDR end; |
| 1230 | }; |
| 1231 | |
| 1232 | #define INIT_SAL(sal) { \ |
| 1233 | (sal)->symtab = 0; \ |
| 1234 | (sal)->section = 0; \ |
| 1235 | (sal)->line = 0; \ |
| 1236 | (sal)->pc = 0; \ |
| 1237 | (sal)->end = 0; \ |
| 1238 | } |
| 1239 | |
| 1240 | struct symtabs_and_lines |
| 1241 | { |
| 1242 | struct symtab_and_line *sals; |
| 1243 | int nelts; |
| 1244 | }; |
| 1245 | |
| 1246 | /* Given a pc value, return line number it is in. Second arg nonzero means |
| 1247 | if pc is on the boundary use the previous statement's line number. */ |
| 1248 | |
| 1249 | extern struct symtab_and_line |
| 1250 | find_pc_line PARAMS ((CORE_ADDR, int)); |
| 1251 | |
| 1252 | /* Same function, but specify a section as well as an address */ |
| 1253 | |
| 1254 | extern struct symtab_and_line |
| 1255 | find_pc_sect_line PARAMS ((CORE_ADDR, asection *, int)); |
| 1256 | |
| 1257 | /* Given an address, return the nearest symbol at or below it in memory. |
| 1258 | Optionally return the symtab it's from through 2nd arg, and the |
| 1259 | address in inferior memory of the symbol through 3rd arg. */ |
| 1260 | |
| 1261 | extern struct symbol * |
| 1262 | find_addr_symbol PARAMS ((CORE_ADDR, struct symtab **, CORE_ADDR *)); |
| 1263 | |
| 1264 | /* Given a symtab and line number, return the pc there. */ |
| 1265 | |
| 1266 | extern CORE_ADDR |
| 1267 | find_line_pc PARAMS ((struct symtab *, int)); |
| 1268 | |
| 1269 | extern int |
| 1270 | find_line_pc_range PARAMS ((struct symtab_and_line, |
| 1271 | CORE_ADDR *, CORE_ADDR *)); |
| 1272 | |
| 1273 | extern void |
| 1274 | resolve_sal_pc PARAMS ((struct symtab_and_line *)); |
| 1275 | |
| 1276 | /* Given a string, return the line specified by it. For commands like "list" |
| 1277 | and "breakpoint". */ |
| 1278 | |
| 1279 | extern struct symtabs_and_lines |
| 1280 | decode_line_spec PARAMS ((char *, int)); |
| 1281 | |
| 1282 | extern struct symtabs_and_lines |
| 1283 | decode_line_spec_1 PARAMS ((char *, int)); |
| 1284 | |
| 1285 | extern struct symtabs_and_lines |
| 1286 | decode_line_1 PARAMS ((char **, int, struct symtab *, int, char ***)); |
| 1287 | |
| 1288 | #if MAINTENANCE_CMDS |
| 1289 | |
| 1290 | /* Symmisc.c */ |
| 1291 | |
| 1292 | void |
| 1293 | maintenance_print_symbols PARAMS ((char *, int)); |
| 1294 | |
| 1295 | void |
| 1296 | maintenance_print_psymbols PARAMS ((char *, int)); |
| 1297 | |
| 1298 | void |
| 1299 | maintenance_print_msymbols PARAMS ((char *, int)); |
| 1300 | |
| 1301 | void |
| 1302 | maintenance_print_objfiles PARAMS ((char *, int)); |
| 1303 | |
| 1304 | void |
| 1305 | maintenance_check_symtabs PARAMS ((char *, int)); |
| 1306 | |
| 1307 | /* maint.c */ |
| 1308 | |
| 1309 | void |
| 1310 | maintenance_print_statistics PARAMS ((char *, int)); |
| 1311 | |
| 1312 | #endif |
| 1313 | |
| 1314 | extern void |
| 1315 | free_symtab PARAMS ((struct symtab *)); |
| 1316 | |
| 1317 | /* Symbol-reading stuff in symfile.c and solib.c. */ |
| 1318 | |
| 1319 | extern struct symtab * |
| 1320 | psymtab_to_symtab PARAMS ((struct partial_symtab *)); |
| 1321 | |
| 1322 | extern void |
| 1323 | clear_solib PARAMS ((void)); |
| 1324 | |
| 1325 | extern struct objfile * |
| 1326 | symbol_file_add PARAMS ((char *, int, CORE_ADDR, int, int, int)); |
| 1327 | |
| 1328 | /* source.c */ |
| 1329 | |
| 1330 | extern int |
| 1331 | identify_source_line PARAMS ((struct symtab *, int, int, CORE_ADDR)); |
| 1332 | |
| 1333 | extern void |
| 1334 | print_source_lines PARAMS ((struct symtab *, int, int, int)); |
| 1335 | |
| 1336 | extern void |
| 1337 | forget_cached_source_info PARAMS ((void)); |
| 1338 | |
| 1339 | extern void |
| 1340 | select_source_symtab PARAMS ((struct symtab *)); |
| 1341 | |
| 1342 | extern char **make_symbol_completion_list PARAMS ((char *, char *)); |
| 1343 | |
| 1344 | /* symtab.c */ |
| 1345 | |
| 1346 | extern struct partial_symtab * |
| 1347 | find_main_psymtab PARAMS ((void)); |
| 1348 | |
| 1349 | /* blockframe.c */ |
| 1350 | |
| 1351 | extern struct blockvector * |
| 1352 | blockvector_for_pc PARAMS ((CORE_ADDR, int *)); |
| 1353 | |
| 1354 | |
| 1355 | extern struct blockvector * |
| 1356 | blockvector_for_pc_sect PARAMS ((CORE_ADDR, asection *, int *, |
| 1357 | struct symtab *)); |
| 1358 | /* symfile.c */ |
| 1359 | |
| 1360 | extern void |
| 1361 | clear_symtab_users PARAMS ((void)); |
| 1362 | |
| 1363 | extern enum language |
| 1364 | deduce_language_from_filename PARAMS ((char *)); |
| 1365 | |
| 1366 | /* symtab.c */ |
| 1367 | |
| 1368 | extern int |
| 1369 | in_prologue PARAMS ((CORE_ADDR pc, CORE_ADDR func_start)); |
| 1370 | |
| 1371 | extern struct symbol * |
| 1372 | fixup_symbol_section PARAMS ((struct symbol *, struct objfile *)); |
| 1373 | |
| 1374 | #endif /* !defined(SYMTAB_H) */ |