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bd5635a1 | 1 | /* Symbol table definitions for GDB. |
4a35d6e9 | 2 | Copyright (C) 1986, 1989, 1991 Free Software Foundation, Inc. |
bd5635a1 RP |
3 | |
4 | This file is part of GDB. | |
5 | ||
4a35d6e9 | 6 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 7 | it under the terms of the GNU General Public License as published by |
4a35d6e9 FF |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. | |
bd5635a1 | 10 | |
4a35d6e9 | 11 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
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 | |
4a35d6e9 FF |
17 | along with this program; if not, write to the Free Software |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
bd5635a1 RP |
19 | |
20 | #if !defined (SYMTAB_H) | |
21 | #define SYMTAB_H 1 | |
7d9884b9 | 22 | #include "obstack.h" |
bd5635a1 RP |
23 | |
24 | /* An obstack to hold objects that should be freed | |
25 | when we load a new symbol table. | |
26 | This includes the symbols made by dbxread | |
27 | and the types that are not permanent. */ | |
28 | ||
29 | extern struct obstack *symbol_obstack; | |
30 | extern struct obstack *psymbol_obstack; | |
31 | ||
32 | /* Some definitions and declarations to go with use of obstacks. */ | |
33 | #define obstack_chunk_alloc xmalloc | |
34 | #define obstack_chunk_free free | |
bd5635a1 RP |
35 | |
36 | /* Some macros for char-based bitfields. */ | |
37 | #define B_SET(a,x) (a[x>>3] |= (1 << (x&7))) | |
38 | #define B_CLR(a,x) (a[x>>3] &= ~(1 << (x&7))) | |
39 | #define B_TST(a,x) (a[x>>3] & (1 << (x&7))) | |
40 | #define B_TYPE unsigned char | |
41 | #define B_BYTES(x) ( 1 + ((x)>>3) ) | |
42 | #define B_CLRALL(a,x) bzero (a, B_BYTES(x)) | |
43 | ||
44 | /* gdb can know one or several symbol tables at the same time; | |
45 | the ultimate intent is to have one for each separately-compiled module. | |
46 | Each such symbol table is recorded by a struct symtab, and they | |
47 | are all chained together. */ | |
48 | ||
49 | /* In addition, gdb can record any number of miscellaneous undebuggable | |
50 | functions' addresses. In a system that appends _ to function names, | |
51 | the _'s are removed from the names stored in this table. */ | |
52 | ||
53 | /* Actually, the misc function list is used to store *all* of the | |
54 | global symbols (text, data, bss, and abs). It is sometimes used | |
55 | to figure out what symtabs to read in. The "type" field is used | |
4a35d6e9 | 56 | occasionally. Calling it the misc "function" vector is now a misnomer. |
bd5635a1 RP |
57 | |
58 | The misc_info field is available for machine-specific information | |
59 | that can be cached along with a misc function vector entry. The | |
60 | AMD 29000 tdep.c uses it to remember things it has decoded from the | |
61 | instructions in the function header, so it doesn't have to rederive | |
62 | the info constantly (over a serial line). It is initialized to zero | |
63 | and stays that way until target-dependent code sets it. */ | |
64 | ||
65 | enum misc_function_type {mf_unknown = 0, mf_text, mf_data, mf_bss, mf_abs}; | |
66 | ||
67 | struct misc_function | |
68 | { | |
69 | char *name; | |
70 | CORE_ADDR address; | |
71 | char *misc_info; /* Random pointer to misc info. void * but for old C */ | |
72 | enum misc_function_type type; | |
73 | }; | |
74 | ||
75 | /* Address and length of the vector recording all misc function names/addresses. */ | |
76 | ||
77 | struct misc_function *misc_function_vector; | |
78 | int misc_function_count; | |
79 | \f | |
bd5635a1 RP |
80 | /* Different kinds of data types are distinguished by the `code' field. */ |
81 | ||
82 | enum type_code | |
83 | { | |
84 | TYPE_CODE_UNDEF, /* Not used; catches errors */ | |
85 | TYPE_CODE_PTR, /* Pointer type */ | |
86 | TYPE_CODE_ARRAY, /* Array type, lower bound zero */ | |
87 | TYPE_CODE_STRUCT, /* C struct or Pascal record */ | |
88 | TYPE_CODE_UNION, /* C union or Pascal variant part */ | |
89 | TYPE_CODE_ENUM, /* Enumeration type */ | |
90 | TYPE_CODE_FUNC, /* Function type */ | |
91 | TYPE_CODE_INT, /* Integer type */ | |
92 | TYPE_CODE_FLT, /* Floating type */ | |
93 | TYPE_CODE_VOID, /* Void type (values zero length) */ | |
94 | TYPE_CODE_SET, /* Pascal sets */ | |
95 | TYPE_CODE_RANGE, /* Range (integers within spec'd bounds) */ | |
96 | TYPE_CODE_PASCAL_ARRAY, /* Array with explicit type of index */ | |
97 | TYPE_CODE_ERROR, /* Unknown type */ | |
98 | ||
99 | /* C++ */ | |
100 | TYPE_CODE_MEMBER, /* Member type */ | |
101 | TYPE_CODE_METHOD, /* Method type */ | |
102 | TYPE_CODE_REF, /* C++ Reference types */ | |
4a35d6e9 FF |
103 | |
104 | /* Modula-2 */ | |
105 | TYPE_CODE_CHAR, /* *real* character type */ | |
0a5d35ed | 106 | TYPE_CODE_BOOL /* Builtin Modula-2 BOOLEAN */ |
bd5635a1 RP |
107 | }; |
108 | ||
109 | /* This appears in a type's flags word for an unsigned integer type. */ | |
110 | #define TYPE_FLAG_UNSIGNED 1 | |
111 | /* This appears in a type's flags word | |
112 | if it is a (pointer to a|function returning a)* built in scalar type. | |
113 | These types are never freed. */ | |
114 | #define TYPE_FLAG_PERM 4 | |
115 | /* This appears in a type's flags word if it is a stub type (eg. if | |
116 | someone referenced a type that wasn't definined in a source file | |
117 | via (struct sir_not_appearing_in_this_film *)). */ | |
118 | #define TYPE_FLAG_STUB 8 | |
bd5635a1 RP |
119 | |
120 | struct type | |
121 | { | |
122 | /* Code for kind of type */ | |
123 | enum type_code code; | |
124 | /* Name of this type, or zero if none. | |
125 | This is used for printing only, except by poorly designed C++ code. | |
126 | Type names specified as input are defined by symbols. */ | |
127 | char *name; | |
128 | /* Length in bytes of storage for a value of this type */ | |
129 | unsigned length; | |
130 | /* For a pointer type, describes the type of object pointed to. | |
131 | For an array type, describes the type of the elements. | |
132 | For a function or method type, describes the type of the value. | |
133 | For a range type, describes the type of the full range. | |
134 | Unused otherwise. */ | |
135 | struct type *target_type; | |
f1d77e90 | 136 | |
bd5635a1 RP |
137 | /* Type that is a pointer to this type. |
138 | Zero if no such pointer-to type is known yet. | |
139 | The debugger may add the address of such a type | |
140 | if it has to construct one later. */ | |
141 | struct type *pointer_type; | |
142 | /* C++: also need a reference type. */ | |
143 | struct type *reference_type; | |
bd5635a1 RP |
144 | /* Type that is a function returning this type. |
145 | Zero if no such function type is known here. | |
146 | The debugger may add the address of such a type | |
147 | if it has to construct one later. */ | |
148 | struct type *function_type; | |
149 | ||
bd5635a1 RP |
150 | /* Flags about this type. */ |
151 | short flags; | |
152 | /* Number of fields described for this type */ | |
153 | short nfields; | |
154 | /* For structure and union types, a description of each field. | |
155 | For set and pascal array types, there is one "field", | |
156 | whose type is the domain type of the set or array. | |
157 | For range types, there are two "fields", | |
158 | the minimum and maximum values (both inclusive). | |
159 | For enum types, each possible value is described by one "field". | |
160 | ||
161 | Using a pointer to a separate array of fields | |
162 | allows all types to have the same size, which is useful | |
163 | because we can allocate the space for a type before | |
164 | we know what to put in it. */ | |
165 | struct field | |
166 | { | |
167 | /* Position of this field, counting in bits from start of | |
168 | containing structure. For a function type, this is the | |
169 | position in the argument list of this argument. | |
170 | For a range bound or enum value, this is the value itself. */ | |
171 | int bitpos; | |
172 | /* Size of this field, in bits, or zero if not packed. | |
173 | For an unpacked field, the field's type's length | |
174 | says how many bytes the field occupies. */ | |
175 | int bitsize; | |
176 | /* In a struct or enum type, type of this field. | |
177 | In a function type, type of this argument. | |
178 | In an array type, the domain-type of the array. */ | |
179 | struct type *type; | |
180 | /* Name of field, value or argument. | |
181 | Zero for range bounds and array domains. */ | |
182 | char *name; | |
183 | } *fields; | |
184 | ||
d018c8a6 FF |
185 | /* For types with virtual functions, VPTR_BASETYPE is the base class which |
186 | defined the virtual function table pointer. VPTR_FIELDNO is | |
187 | the field number of that pointer in the structure. | |
188 | ||
189 | For types that are pointer to member types, VPTR_BASETYPE | |
f1d77e90 | 190 | is the type that this pointer is a member of. |
d018c8a6 FF |
191 | |
192 | Unused otherwise. */ | |
193 | struct type *vptr_basetype; | |
194 | ||
195 | int vptr_fieldno; | |
196 | ||
197 | /* Slot to point to additional language-specific fields of this type. */ | |
67c29f75 | 198 | union type_specific |
d018c8a6 | 199 | { |
0a5d35ed | 200 | /* ARG_TYPES is for TYPE_CODE_METHOD and TYPE_CODE_FUNCTION. */ |
d018c8a6 | 201 | struct type **arg_types; |
0a5d35ed | 202 | /* CPLUS_STUFF is for TYPE_CODE_STRUCT. */ |
d018c8a6 FF |
203 | struct cplus_struct_type *cplus_stuff; |
204 | } type_specific; | |
205 | }; | |
206 | ||
f1d77e90 JG |
207 | /* C++ language-specific information for TYPE_CODE_STRUCT and TYPE_CODE_UNION |
208 | nodes. */ | |
d018c8a6 FF |
209 | struct cplus_struct_type |
210 | { | |
bd5635a1 RP |
211 | B_TYPE *virtual_field_bits; /* if base class is virtual */ |
212 | B_TYPE *private_field_bits; | |
213 | B_TYPE *protected_field_bits; | |
214 | ||
215 | /* Number of methods described for this type */ | |
216 | short nfn_fields; | |
217 | /* Number of base classes this type derives from. */ | |
218 | short n_baseclasses; | |
219 | ||
220 | /* Number of methods described for this type plus all the | |
221 | methods that it derives from. */ | |
222 | int nfn_fields_total; | |
223 | ||
224 | /* For classes, structures, and unions, a description of each field, | |
225 | which consists of an overloaded name, followed by the types of | |
226 | arguments that the method expects, and then the name after it | |
227 | has been renamed to make it distinct. */ | |
228 | struct fn_fieldlist | |
229 | { | |
230 | /* The overloaded name. */ | |
231 | char *name; | |
232 | /* The number of methods with this name. */ | |
233 | int length; | |
234 | /* The list of methods. */ | |
235 | struct fn_field | |
236 | { | |
bd5635a1 RP |
237 | /* The return value of the method */ |
238 | struct type *type; | |
239 | /* The argument list */ | |
240 | struct type **args; | |
241 | /* The name after it has been processed */ | |
242 | char *physname; | |
243 | ||
244 | /* For virtual functions. */ | |
245 | /* First baseclass that defines this virtual function. */ | |
246 | struct type *fcontext; | |
bcccec8c PB |
247 | unsigned int is_const : 1; |
248 | unsigned int is_volatile : 1; | |
0a5d35ed SG |
249 | unsigned int is_private : 1; |
250 | unsigned int is_protected : 1; | |
251 | unsigned int is_stub : 1; | |
252 | unsigned int dummy : 3; | |
253 | ||
bd5635a1 | 254 | /* Index into that baseclass's virtual function table, |
bcccec8c | 255 | minus 2; else if static: VOFFSET_STATIC; else: 0. */ |
0a5d35ed | 256 | unsigned voffset : 24; |
bcccec8c | 257 | # define VOFFSET_STATIC 1 |
bd5635a1 RP |
258 | } *fn_fields; |
259 | ||
bd5635a1 RP |
260 | } *fn_fieldlists; |
261 | ||
262 | unsigned char via_protected; | |
263 | unsigned char via_public; | |
bd5635a1 RP |
264 | }; |
265 | \f | |
266 | /* All of the name-scope contours of the program | |
267 | are represented by `struct block' objects. | |
268 | All of these objects are pointed to by the blockvector. | |
269 | ||
270 | Each block represents one name scope. | |
271 | Each lexical context has its own block. | |
272 | ||
273 | The first two blocks in the blockvector are special. | |
274 | The first one contains all the symbols defined in this compilation | |
275 | whose scope is the entire program linked together. | |
276 | The second one contains all the symbols whose scope is the | |
277 | entire compilation excluding other separate compilations. | |
278 | In C, these correspond to global symbols and static symbols. | |
279 | ||
280 | Each block records a range of core addresses for the code that | |
281 | is in the scope of the block. The first two special blocks | |
282 | give, for the range of code, the entire range of code produced | |
283 | by the compilation that the symbol segment belongs to. | |
284 | ||
285 | The blocks appear in the blockvector | |
286 | in order of increasing starting-address, | |
287 | and, within that, in order of decreasing ending-address. | |
288 | ||
289 | This implies that within the body of one function | |
290 | the blocks appear in the order of a depth-first tree walk. */ | |
291 | ||
292 | struct blockvector | |
293 | { | |
294 | /* Number of blocks in the list. */ | |
295 | int nblocks; | |
296 | /* The blocks themselves. */ | |
297 | struct block *block[1]; | |
298 | }; | |
299 | ||
92a29b47 JG |
300 | /* Special block numbers */ |
301 | #define GLOBAL_BLOCK 0 | |
302 | #define STATIC_BLOCK 1 | |
303 | #define FIRST_LOCAL_BLOCK 2 | |
304 | ||
bd5635a1 RP |
305 | struct block |
306 | { | |
307 | /* Addresses in the executable code that are in this block. | |
308 | Note: in an unrelocated symbol segment in a file, | |
309 | these are always zero. They can be filled in from the | |
310 | N_LBRAC and N_RBRAC symbols in the loader symbol table. */ | |
311 | CORE_ADDR startaddr, endaddr; | |
312 | /* The symbol that names this block, | |
313 | if the block is the body of a function; | |
314 | otherwise, zero. | |
315 | Note: In an unrelocated symbol segment in an object file, | |
316 | this field may be zero even when the block has a name. | |
317 | That is because the block is output before the name | |
318 | (since the name resides in a higher block). | |
319 | Since the symbol does point to the block (as its value), | |
320 | it is possible to find the block and set its name properly. */ | |
321 | struct symbol *function; | |
322 | /* The `struct block' for the containing block, or 0 if none. */ | |
323 | /* Note that in an unrelocated symbol segment in an object file | |
324 | this pointer may be zero when the correct value should be | |
325 | the second special block (for symbols whose scope is one compilation). | |
326 | This is because the compiler ouptuts the special blocks at the | |
327 | very end, after the other blocks. */ | |
328 | struct block *superblock; | |
329 | /* A flag indicating whether or not the fucntion corresponding | |
330 | to this block was compiled with gcc or not. If there is no | |
331 | function corresponding to this block, this meaning of this flag | |
332 | is undefined. (In practice it will be 1 if the block was created | |
333 | while processing a file compiled with gcc and 0 when not). */ | |
334 | unsigned char gcc_compile_flag; | |
335 | /* Number of local symbols. */ | |
336 | int nsyms; | |
337 | /* The symbols. */ | |
338 | struct symbol *sym[1]; | |
339 | }; | |
340 | \f | |
341 | /* Represent one symbol name; a variable, constant, function or typedef. */ | |
342 | ||
343 | /* Different name spaces for symbols. Looking up a symbol specifies | |
344 | a namespace and ignores symbol definitions in other name spaces. | |
345 | ||
346 | VAR_NAMESPACE is the usual namespace. | |
347 | In C, this contains variables, function names, typedef names | |
348 | and enum type values. | |
349 | ||
350 | STRUCT_NAMESPACE is used in C to hold struct, union and enum type names. | |
351 | Thus, if `struct foo' is used in a C program, | |
352 | it produces a symbol named `foo' in the STRUCT_NAMESPACE. | |
353 | ||
354 | LABEL_NAMESPACE may be used for names of labels (for gotos); | |
355 | currently it is not used and labels are not recorded at all. */ | |
356 | ||
357 | /* For a non-global symbol allocated statically, | |
358 | the correct core address cannot be determined by the compiler. | |
359 | The compiler puts an index number into the symbol's value field. | |
360 | This index number can be matched with the "desc" field of | |
361 | an entry in the loader symbol table. */ | |
362 | ||
363 | enum namespace | |
364 | { | |
0a5d35ed | 365 | UNDEF_NAMESPACE, VAR_NAMESPACE, STRUCT_NAMESPACE, LABEL_NAMESPACE |
bd5635a1 RP |
366 | }; |
367 | ||
368 | /* An address-class says where to find the value of a symbol. */ | |
369 | ||
370 | enum address_class | |
371 | { | |
372 | LOC_UNDEF, /* Not used; catches errors */ | |
373 | LOC_CONST, /* Value is constant int SYMBOL_VALUE, host byteorder */ | |
374 | LOC_STATIC, /* Value is at fixed address SYMBOL_VALUE_ADDRESS */ | |
375 | LOC_REGISTER, /* Value is in register */ | |
376 | LOC_ARG, /* Value is at spec'd offset in arglist */ | |
377 | LOC_REF_ARG, /* Value address is at spec'd offset in arglist. */ | |
378 | LOC_REGPARM, /* Value is at spec'd offset in register window */ | |
379 | LOC_LOCAL, /* Value is at spec'd offset in stack frame */ | |
380 | LOC_TYPEDEF, /* Value not used; definition in SYMBOL_TYPE | |
381 | Symbols in the namespace STRUCT_NAMESPACE | |
382 | all have this class. */ | |
383 | LOC_LABEL, /* Value is address SYMBOL_VALUE_ADDRESS in the code */ | |
384 | LOC_BLOCK, /* Value is address SYMBOL_VALUE_BLOCK of a | |
385 | `struct block'. Function names have this class. */ | |
bd5635a1 RP |
386 | LOC_CONST_BYTES, /* Value is a constant byte-sequence pointed to by |
387 | SYMBOL_VALUE_ADDRESS, in target byte order. */ | |
0a5d35ed | 388 | LOC_LOCAL_ARG /* Value is arg at spec'd offset in stack frame. |
bd5635a1 RP |
389 | Differs from LOC_LOCAL in that symbol is an |
390 | argument; differs from LOC_ARG in that we find it | |
391 | in the frame (FRAME_LOCALS_ADDRESS), not in the | |
392 | arglist (FRAME_ARGS_ADDRESS). Added for i960, | |
393 | which passes args in regs then copies to frame. */ | |
394 | }; | |
395 | ||
396 | struct symbol | |
397 | { | |
398 | /* Symbol name */ | |
399 | char *name; | |
400 | /* Name space code. */ | |
401 | enum namespace namespace; | |
402 | /* Address class */ | |
403 | enum address_class class; | |
404 | /* Data type of value */ | |
405 | struct type *type; | |
406 | ||
407 | /* Line number of definition. */ | |
408 | unsigned short line; | |
409 | ||
410 | /* constant value, or address if static, or register number, | |
411 | or offset in arguments, or offset in stack frame. All of | |
412 | these are in host byte order (though what they point to might | |
413 | be in target byte order, e.g. LOC_CONST_BYTES). */ | |
414 | union | |
415 | { | |
416 | long value; /* for LOC_CONST, LOC_REGISTER, LOC_ARG, | |
417 | LOC_REF_ARG, LOC_REGPARM, LOC_LOCAL */ | |
418 | struct block *block; /* for LOC_BLOCK */ | |
419 | char *bytes; /* for LOC_CONST_BYTES */ | |
4a35d6e9 | 420 | CORE_ADDR address; /* for LOC_STATIC, LOC_LABEL */ |
bd5635a1 RP |
421 | struct symbol *chain; /* for opaque typedef struct chain */ |
422 | } | |
423 | value; | |
424 | }; | |
425 | ||
426 | ||
427 | /* A partial_symbol records the name, namespace, and address class of | |
428 | symbols whose types we have not parsed yet. For functions, it also | |
429 | contains their memory address, so we can find them from a PC value. | |
430 | Each partial_symbol sits in a partial_symtab, all of which are chained | |
431 | on the partial_symtab_list and which points to the corresponding | |
432 | normal symtab once the partial_symtab has been referenced. */ | |
433 | ||
434 | struct partial_symbol | |
435 | { | |
436 | /* Symbol name */ | |
437 | char *name; | |
438 | /* Name space code. */ | |
439 | enum namespace namespace; | |
440 | /* Address class (for info_symbols) */ | |
441 | enum address_class class; | |
442 | /* Value (only used for static functions currently). Done this | |
443 | way so that we can use the struct symbol macros. | |
444 | Note that the address of a function is SYMBOL_VALUE_ADDRESS (pst) | |
445 | in a partial symbol table, but BLOCK_START (SYMBOL_BLOCK_VALUE (st)) | |
446 | in a symbol table. */ | |
447 | union | |
448 | { | |
449 | long value; | |
450 | CORE_ADDR address; | |
451 | } | |
452 | value; | |
453 | }; | |
454 | \f | |
455 | /* Source-file information. | |
456 | This describes the relation between source files and line numbers | |
457 | and addresses in the program text. */ | |
458 | ||
459 | struct sourcevector | |
460 | { | |
461 | int length; /* Number of source files described */ | |
462 | struct source *source[1]; /* Descriptions of the files */ | |
463 | }; | |
464 | ||
465 | /* Each item represents a line-->pc (or the reverse) mapping. This is | |
466 | somewhat more wasteful of space than one might wish, but since only | |
467 | the files which are actually debugged are read in to core, we don't | |
468 | waste much space. | |
469 | ||
470 | Each item used to be an int; either minus a line number, or a | |
471 | program counter. If it represents a line number, that is the line | |
472 | described by the next program counter value. If it is positive, it | |
473 | is the program counter at which the code for the next line starts. */ | |
474 | ||
475 | struct linetable_entry | |
476 | { | |
477 | int line; | |
478 | CORE_ADDR pc; | |
479 | }; | |
480 | ||
481 | struct linetable | |
482 | { | |
483 | int nitems; | |
484 | struct linetable_entry item[1]; | |
485 | }; | |
486 | ||
487 | /* All the information on one source file. */ | |
488 | ||
489 | struct source | |
490 | { | |
491 | char *name; /* Name of file */ | |
492 | struct linetable contents; | |
493 | }; | |
494 | ||
495 | /* Each source file is represented by a struct symtab. | |
496 | These objects are chained through the `next' field. */ | |
497 | ||
498 | struct symtab | |
499 | { | |
500 | /* Chain of all existing symtabs. */ | |
501 | struct symtab *next; | |
502 | /* List of all symbol scope blocks for this symtab. */ | |
503 | struct blockvector *blockvector; | |
4137c5fc JG |
504 | /* Table mapping core addresses to line numbers for this file. |
505 | Can be NULL if none. */ | |
bd5635a1 | 506 | struct linetable *linetable; |
bd5635a1 RP |
507 | /* Name of this source file. */ |
508 | char *filename; | |
509 | /* Directory in which it was compiled, or NULL if we don't know. */ | |
510 | char *dirname; | |
511 | /* This component says how to free the data we point to: | |
512 | free_contents => do a tree walk and free each object. | |
513 | free_nothing => do nothing; some other symtab will free | |
514 | the data this one uses. | |
515 | free_linetable => free just the linetable. */ | |
516 | enum free_code {free_nothing, free_contents, free_linetable} | |
517 | free_code; | |
518 | /* Pointer to one block of storage to be freed, if nonzero. */ | |
519 | /* This is IN ADDITION to the action indicated by free_code. */ | |
520 | char *free_ptr; | |
521 | /* Total number of lines found in source file. */ | |
522 | int nlines; | |
523 | /* Array mapping line number to character position. */ | |
524 | int *line_charpos; | |
525 | /* Language of this source file. */ | |
526 | enum language language; | |
527 | /* String of version information. May be zero. */ | |
528 | char *version; | |
529 | /* Full name of file as found by searching the source path. | |
530 | 0 if not yet known. */ | |
531 | char *fullname; | |
8aa13b87 | 532 | |
a048c8f5 JG |
533 | /* Object file from which this symbol information was read. */ |
534 | struct objfile *objfile; | |
535 | /* Chain of all symtabs owned by that objfile. */ | |
536 | struct symtab *objfile_chain; | |
537 | ||
8aa13b87 JK |
538 | /* Anything extra for this symtab. This is for target machines |
539 | with special debugging info of some sort (which cannot just | |
540 | be represented in a normal symtab). */ | |
541 | #if defined (EXTRA_SYMTAB_INFO) | |
542 | EXTRA_SYMTAB_INFO | |
543 | #endif | |
bd5635a1 RP |
544 | }; |
545 | ||
546 | /* Each source file that has not been fully read in is represented by | |
547 | a partial_symtab. This contains the information on where in the | |
548 | executable the debugging symbols for a specific file are, and a | |
549 | list of names of global symbols which are located in this file. | |
550 | They are all chained on partial_symtab_list. | |
551 | ||
552 | Even after the source file has been read into a symtab, the | |
553 | partial_symtab remains around. They are allocated on an obstack, | |
554 | psymbol_obstack. FIXME, this is bad for dynamic linking or VxWorks- | |
555 | style execution of a bunch of .o's. */ | |
556 | struct partial_symtab | |
557 | { | |
558 | /* Chain of all existing partial symtabs. */ | |
559 | struct partial_symtab *next; | |
560 | /* Name of the source file which this partial_symtab defines */ | |
561 | char *filename; | |
562 | ||
a048c8f5 JG |
563 | /* Information about the object file from which symbols should be read. */ |
564 | struct objfile *objfile; | |
565 | /* Chain of psymtabs owned by this objfile */ | |
566 | struct partial_symtab *objfile_chain; | |
567 | ||
bd5635a1 RP |
568 | /* Address relative to which the symbols in this file are. Need to |
569 | relocate by this amount when reading in symbols from the symbol | |
570 | file. */ | |
571 | CORE_ADDR addr; | |
bd5635a1 RP |
572 | /* Range of text addresses covered by this file; texthigh is the |
573 | beginning of the next section. */ | |
574 | CORE_ADDR textlow, texthigh; | |
575 | /* Array of pointers to all of the partial_symtab's which this one | |
576 | depends on. Since this array can only be set to previous or | |
577 | the current (?) psymtab, this dependency tree is guaranteed not | |
578 | to have any loops. */ | |
579 | struct partial_symtab **dependencies; | |
580 | int number_of_dependencies; | |
581 | /* Global symbol list. This list will be sorted after readin to | |
582 | improve access. Binary search will be the usual method of | |
583 | finding a symbol within it. globals_offset is an integer offset | |
4a35d6e9 | 584 | within global_psymbols[]. */ |
bd5635a1 RP |
585 | int globals_offset, n_global_syms; |
586 | /* Static symbol list. This list will *not* be sorted after readin; | |
587 | to find a symbol in it, exhaustive search must be used. This is | |
588 | reasonable because searches through this list will eventually | |
589 | lead to either the read in of a files symbols for real (assumed | |
590 | to take a *lot* of time; check) or an error (and we don't care | |
4a35d6e9 FF |
591 | how long errors take). This is an offset and size within |
592 | static_psymbols[]. */ | |
bd5635a1 RP |
593 | int statics_offset, n_static_syms; |
594 | /* Pointer to symtab eventually allocated for this source file, 0 if | |
595 | !readin or if we haven't looked for the symtab after it was readin. */ | |
596 | struct symtab *symtab; | |
597 | /* Pointer to function which will read in the symtab corresponding to | |
598 | this psymtab. */ | |
599 | void (*read_symtab) (); | |
4a35d6e9 FF |
600 | /* Information that lets read_symtab() locate the part of the symbol table |
601 | that this psymtab corresponds to. This information is private to the | |
602 | format-dependent symbol reading routines. For further detail examine | |
603 | the various symbol reading modules. Should really be (void *) but is | |
604 | (char *) as with other such gdb variables. (FIXME) */ | |
605 | char *read_symtab_private; | |
bd5635a1 RP |
606 | /* Non-zero if the symtab corresponding to this psymtab has been |
607 | readin */ | |
608 | unsigned char readin; | |
609 | }; | |
610 | ||
611 | /* A fast way to get from a psymtab to its symtab (after the first time). */ | |
612 | #define PSYMTAB_TO_SYMTAB(pst) ((pst)->symtab? \ | |
613 | (pst)->symtab: \ | |
614 | psymtab_to_symtab (pst) ) | |
615 | ||
616 | /* This is the list of struct symtab's that gdb considers current. */ | |
617 | ||
618 | struct symtab *symtab_list; | |
619 | ||
620 | /* This is the list of struct partial_symtab's that gdb may need to access */ | |
621 | ||
622 | struct partial_symtab *partial_symtab_list; | |
623 | ||
624 | /* This symtab variable specifies the current file for printing source lines */ | |
625 | ||
626 | struct symtab *current_source_symtab; | |
627 | ||
628 | /* This is the next line to print for listing source lines. */ | |
629 | ||
630 | int current_source_line; | |
631 | ||
bd5635a1 RP |
632 | #define BLOCKVECTOR(symtab) (symtab)->blockvector |
633 | ||
bd5635a1 RP |
634 | #define LINETABLE(symtab) (symtab)->linetable |
635 | \f | |
636 | /* Macros normally used to access components of symbol table structures. */ | |
637 | ||
bd5635a1 RP |
638 | #define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks |
639 | #define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n] | |
640 | ||
bd5635a1 RP |
641 | #define BLOCK_START(bl) (bl)->startaddr |
642 | #define BLOCK_END(bl) (bl)->endaddr | |
643 | #define BLOCK_NSYMS(bl) (bl)->nsyms | |
644 | #define BLOCK_SYM(bl, n) (bl)->sym[n] | |
645 | #define BLOCK_FUNCTION(bl) (bl)->function | |
646 | #define BLOCK_SUPERBLOCK(bl) (bl)->superblock | |
647 | #define BLOCK_GCC_COMPILED(bl) (bl)->gcc_compile_flag | |
648 | ||
649 | /* Nonzero if symbols of block BL should be sorted alphabetically. */ | |
650 | #define BLOCK_SHOULD_SORT(bl) ((bl)->nsyms >= 40) | |
651 | ||
652 | #define SYMBOL_NAME(symbol) (symbol)->name | |
653 | #define SYMBOL_NAMESPACE(symbol) (symbol)->namespace | |
654 | #define SYMBOL_CLASS(symbol) (symbol)->class | |
655 | #define SYMBOL_VALUE(symbol) (symbol)->value.value | |
656 | #define SYMBOL_VALUE_ADDRESS(symbol) (symbol)->value.address | |
657 | #define SYMBOL_VALUE_BYTES(symbol) (symbol)->value.bytes | |
658 | #define SYMBOL_BLOCK_VALUE(symbol) (symbol)->value.block | |
659 | #define SYMBOL_VALUE_CHAIN(symbol) (symbol)->value.chain | |
660 | #define SYMBOL_TYPE(symbol) (symbol)->type | |
661 | #define SYMBOL_LINE(symbol) (symbol)->line | |
662 | ||
663 | #define TYPE_NAME(thistype) (thistype)->name | |
664 | #define TYPE_TARGET_TYPE(thistype) (thistype)->target_type | |
665 | #define TYPE_POINTER_TYPE(thistype) (thistype)->pointer_type | |
666 | #define TYPE_REFERENCE_TYPE(thistype) (thistype)->reference_type | |
667 | #define TYPE_FUNCTION_TYPE(thistype) (thistype)->function_type | |
bd5635a1 RP |
668 | #define TYPE_LENGTH(thistype) (thistype)->length |
669 | #define TYPE_FLAGS(thistype) (thistype)->flags | |
670 | #define TYPE_UNSIGNED(thistype) ((thistype)->flags & TYPE_FLAG_UNSIGNED) | |
671 | #define TYPE_CODE(thistype) (thistype)->code | |
672 | #define TYPE_NFIELDS(thistype) (thistype)->nfields | |
673 | #define TYPE_FIELDS(thistype) (thistype)->fields | |
674 | /* C++ */ | |
675 | #define TYPE_VPTR_BASETYPE(thistype) (thistype)->vptr_basetype | |
676 | #define TYPE_DOMAIN_TYPE(thistype) (thistype)->vptr_basetype | |
677 | #define TYPE_VPTR_FIELDNO(thistype) (thistype)->vptr_fieldno | |
d018c8a6 FF |
678 | #define TYPE_FN_FIELDS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->fn_fields |
679 | #define TYPE_NFN_FIELDS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->nfn_fields | |
680 | #define TYPE_NFN_FIELDS_TOTAL(thistype) TYPE_CPLUS_SPECIFIC(thistype)->nfn_fields_total | |
67c29f75 | 681 | #define TYPE_TYPE_SPECIFIC(thistype) (thistype)->type_specific |
d018c8a6 FF |
682 | #define TYPE_ARG_TYPES(thistype) (thistype)->type_specific.arg_types |
683 | #define TYPE_CPLUS_SPECIFIC(thistype) (thistype)->type_specific.cplus_stuff | |
bd5635a1 | 684 | #define TYPE_BASECLASS(thistype,index) (thistype)->fields[index].type |
d018c8a6 | 685 | #define TYPE_N_BASECLASSES(thistype) TYPE_CPLUS_SPECIFIC(thistype)->n_baseclasses |
bd5635a1 RP |
686 | #define TYPE_BASECLASS_NAME(thistype,index) (thistype)->fields[index].name |
687 | #define TYPE_BASECLASS_BITPOS(thistype,index) (thistype)->fields[index].bitpos | |
688 | #define BASETYPE_VIA_PUBLIC(thistype, index) (!TYPE_FIELD_PRIVATE(thistype, index)) | |
d018c8a6 FF |
689 | #define BASETYPE_VIA_VIRTUAL(thistype, index) \ |
690 | B_TST(TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (index)) | |
bd5635a1 RP |
691 | |
692 | #define TYPE_FIELD(thistype, n) (thistype)->fields[n] | |
693 | #define TYPE_FIELD_TYPE(thistype, n) (thistype)->fields[n].type | |
694 | #define TYPE_FIELD_NAME(thistype, n) (thistype)->fields[n].name | |
695 | #define TYPE_FIELD_VALUE(thistype, n) (* (int*) &(thistype)->fields[n].type) | |
696 | #define TYPE_FIELD_BITPOS(thistype, n) (thistype)->fields[n].bitpos | |
697 | #define TYPE_FIELD_BITSIZE(thistype, n) (thistype)->fields[n].bitsize | |
698 | #define TYPE_FIELD_PACKED(thistype, n) (thistype)->fields[n].bitsize | |
699 | ||
d018c8a6 FF |
700 | #define TYPE_FIELD_PRIVATE_BITS(thistype) \ |
701 | TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits | |
702 | #define TYPE_FIELD_PROTECTED_BITS(thistype) \ | |
703 | TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits | |
704 | #define TYPE_FIELD_VIRTUAL_BITS(thistype) \ | |
705 | TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits | |
706 | #define SET_TYPE_FIELD_PRIVATE(thistype, n) \ | |
707 | B_SET (TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits, (n)) | |
708 | #define SET_TYPE_FIELD_PROTECTED(thistype, n) \ | |
709 | B_SET (TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits, (n)) | |
710 | #define SET_TYPE_FIELD_VIRTUAL(thistype, n) \ | |
711 | B_SET (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (n)) | |
712 | #define TYPE_FIELD_PRIVATE(thistype, n) \ | |
713 | B_TST(TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits, (n)) | |
714 | #define TYPE_FIELD_PROTECTED(thistype, n) \ | |
715 | B_TST(TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits, (n)) | |
716 | #define TYPE_FIELD_VIRTUAL(thistype, n) \ | |
717 | B_TST(TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (n)) | |
bd5635a1 RP |
718 | |
719 | #define TYPE_FIELD_STATIC(thistype, n) ((thistype)->fields[n].bitpos == -1) | |
720 | #define TYPE_FIELD_STATIC_PHYSNAME(thistype, n) ((char *)(thistype)->fields[n].bitsize) | |
721 | ||
d018c8a6 FF |
722 | #define TYPE_FN_FIELDLISTS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists |
723 | #define TYPE_FN_FIELDLIST(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n] | |
724 | #define TYPE_FN_FIELDLIST1(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].fn_fields | |
725 | #define TYPE_FN_FIELDLIST_NAME(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].name | |
726 | #define TYPE_FN_FIELDLIST_LENGTH(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].length | |
727 | ||
728 | #define TYPE_FN_FIELD(thisfn, n) (thisfn)[n] | |
729 | #define TYPE_FN_FIELD_NAME(thisfn, n) (thisfn)[n].name | |
730 | #define TYPE_FN_FIELD_TYPE(thisfn, n) (thisfn)[n].type | |
731 | #define TYPE_FN_FIELD_ARGS(thisfn, n) TYPE_ARG_TYPES ((thisfn)[n].type) | |
732 | #define TYPE_FN_FIELD_PHYSNAME(thisfn, n) (thisfn)[n].physname | |
733 | #define TYPE_FN_FIELD_VIRTUAL_P(thisfn, n) ((thisfn)[n].voffset > 1) | |
734 | #define TYPE_FN_FIELD_STATIC_P(thisfn, n) ((thisfn)[n].voffset == VOFFSET_STATIC) | |
735 | #define TYPE_FN_FIELD_VOFFSET(thisfn, n) ((thisfn)[n].voffset-2) | |
736 | #define TYPE_FN_FIELD_FCONTEXT(thisfn, n) ((thisfn)[n].fcontext) | |
0a5d35ed SG |
737 | #define TYPE_FN_FIELD_STUB(thisfn, n) ((thisfn)[n].is_stub) |
738 | #define TYPE_FN_FIELD_PRIVATE(thisfn, n) ((thisfn)[n].is_private) | |
739 | #define TYPE_FN_FIELD_PROTECTED(thisfn, n) ((thisfn)[n].is_protected) | |
bd5635a1 RP |
740 | |
741 | /* The virtual function table is now an array of structures | |
742 | which have the form { int16 offset, delta; void *pfn; }. | |
aec4cb91 | 743 | |
ea9cdf62 JK |
744 | In normal virtual function tables, OFFSET is unused. |
745 | DELTA is the amount which is added to the apparent object's base | |
746 | address in order to point to the actual object to which the | |
747 | virtual function should be applied. | |
748 | PFN is a pointer to the virtual function. */ | |
bd5635a1 RP |
749 | |
750 | #define VTBL_FNADDR_OFFSET 2 | |
ea9cdf62 JK |
751 | |
752 | /* Macro that yields non-zero value iff NAME is the prefix | |
753 | for C++ operator names. If you leave out the parenthesis | |
754 | here you will lose! | |
755 | ||
756 | Currently 'o' 'p' CPLUS_MARKER is used for both the symbol in the | |
757 | symbol-file and the names in gdb's symbol table. */ | |
758 | #define OPNAME_PREFIX_P(NAME) ((NAME)[0] == 'o' && (NAME)[1] == 'p' \ | |
759 | && (NAME)[2] == CPLUS_MARKER) | |
760 | ||
761 | #define VTBL_PREFIX_P(NAME) ((NAME)[3] == CPLUS_MARKER \ | |
762 | && !strncmp ((NAME), "_vt", 3)) | |
bd5635a1 RP |
763 | \f |
764 | /* Functions that work on the objects described above */ | |
765 | ||
766 | extern struct symtab *lookup_symtab (); | |
767 | extern struct symbol *lookup_symbol (); | |
768 | extern struct symbol *lookup_block_symbol (); | |
769 | extern int lookup_misc_func (); | |
770 | extern void check_stub_type (); | |
771 | extern void check_stub_method (); | |
772 | extern struct type *lookup_primitive_typename (); | |
773 | extern struct type *lookup_typename (); | |
774 | extern struct type *lookup_unsigned_typename (); | |
775 | extern struct type *lookup_struct (); | |
776 | extern struct type *lookup_union (); | |
777 | extern struct type *lookup_enum (); | |
778 | extern struct type *lookup_struct_elt_type (); | |
779 | extern struct type *lookup_pointer_type (); | |
780 | extern struct type *lookup_function_type (); | |
bd5635a1 RP |
781 | extern struct type *create_array_type (); |
782 | extern struct symbol *block_function (); | |
783 | extern struct symbol *find_pc_function (); | |
784 | extern int find_pc_partial_function (); | |
4a35d6e9 | 785 | extern void clear_pc_function_cache (); |
bd5635a1 RP |
786 | extern struct partial_symtab *lookup_partial_symtab (); |
787 | extern struct partial_symtab *find_pc_psymtab (); | |
788 | extern struct symtab *find_pc_symtab (); | |
789 | extern struct partial_symbol *find_pc_psymbol (); | |
790 | extern int find_pc_misc_function (); | |
791 | extern int find_pc_line_pc_range (); | |
792 | extern char *type_name_no_tag (); | |
793 | extern int contained_in(); | |
794 | ||
795 | /* C++ stuff. */ | |
d018c8a6 | 796 | extern struct type *lookup_template_type (); |
bd5635a1 RP |
797 | extern struct type *lookup_reference_type (); |
798 | extern struct type *lookup_member_type (); | |
bd5635a1 | 799 | extern void smash_to_method_type (); |
e1ce8aa5 JK |
800 | void smash_to_member_type ( |
801 | #ifdef __STDC__ | |
802 | struct type *, struct type *, struct type * | |
803 | #endif | |
804 | ); | |
ea9cdf62 | 805 | extern struct type *allocate_stub_method (); |
bd5635a1 RP |
806 | /* end of C++ stuff. */ |
807 | ||
bd5635a1 RP |
808 | extern void reread_symbols (); |
809 | ||
810 | extern struct type *builtin_type_void; | |
811 | extern struct type *builtin_type_char; | |
812 | extern struct type *builtin_type_short; | |
813 | extern struct type *builtin_type_int; | |
814 | extern struct type *builtin_type_long; | |
815 | extern struct type *builtin_type_unsigned_char; | |
816 | extern struct type *builtin_type_unsigned_short; | |
817 | extern struct type *builtin_type_unsigned_int; | |
818 | extern struct type *builtin_type_unsigned_long; | |
819 | extern struct type *builtin_type_float; | |
820 | extern struct type *builtin_type_double; | |
e2aab031 FF |
821 | extern struct type *builtin_type_long_double; |
822 | extern struct type *builtin_type_complex; | |
823 | extern struct type *builtin_type_double_complex; | |
bd5635a1 RP |
824 | /* This type represents a type that was unrecognized in symbol |
825 | read-in. */ | |
826 | extern struct type *builtin_type_error; | |
827 | ||
bd5635a1 RP |
828 | extern struct type *builtin_type_long_long; |
829 | extern struct type *builtin_type_unsigned_long_long; | |
830 | ||
4a35d6e9 FF |
831 | /* Modula-2 types */ |
832 | extern struct type *builtin_type_m2_char; | |
833 | extern struct type *builtin_type_m2_int; | |
834 | extern struct type *builtin_type_m2_card; | |
835 | extern struct type *builtin_type_m2_real; | |
836 | extern struct type *builtin_type_m2_bool; | |
837 | ||
ea9cdf62 JK |
838 | /* LONG_LONG is defined if the host has "long long". */ |
839 | #ifdef LONG_LONG | |
bd5635a1 RP |
840 | #define BUILTIN_TYPE_LONGEST builtin_type_long_long |
841 | #define BUILTIN_TYPE_UNSIGNED_LONGEST builtin_type_unsigned_long_long | |
842 | /* This should not be a typedef, because "unsigned LONGEST" needs | |
843 | to work. */ | |
844 | #define LONGEST long long | |
845 | ||
846 | #else /* not LONG_LONG. */ | |
847 | ||
848 | #define BUILTIN_TYPE_LONGEST builtin_type_long | |
849 | #define BUILTIN_TYPE_UNSIGNED_LONGEST builtin_type_unsigned_long | |
850 | #define LONGEST long | |
851 | ||
852 | #endif /* not LONG_LONG. */ | |
853 | ||
854 | struct symtab_and_line | |
855 | { | |
856 | struct symtab *symtab; | |
857 | int line; | |
858 | CORE_ADDR pc; | |
859 | CORE_ADDR end; | |
860 | }; | |
861 | ||
862 | struct symtabs_and_lines | |
863 | { | |
864 | struct symtab_and_line *sals; | |
865 | int nelts; | |
866 | }; | |
867 | ||
868 | /* Given a pc value, return line number it is in. | |
869 | Second arg nonzero means if pc is on the boundary | |
870 | use the previous statement's line number. */ | |
871 | ||
872 | struct symtab_and_line find_pc_line (); | |
873 | ||
874 | /* Given a symtab and line number, return the pc there. */ | |
875 | extern CORE_ADDR find_line_pc (); | |
876 | extern int find_line_pc_range (); | |
877 | ||
878 | /* Given a string, return the line specified by it. | |
879 | For commands like "list" and "breakpoint". */ | |
880 | ||
881 | struct symtabs_and_lines decode_line_spec (); | |
882 | struct symtabs_and_lines decode_line_spec_1 (); | |
883 | struct symtabs_and_lines decode_line_1 (); | |
884 | ||
5c43db6b JG |
885 | /* Symmisc.c */ |
886 | void free_symtab (); | |
887 | ||
bd5635a1 RP |
888 | /* Symbol-reading stuff in symfile.c and solib.c. */ |
889 | struct symtab *psymtab_to_symtab (); | |
890 | void clear_solib (); | |
891 | void symbol_file_add (); | |
892 | ||
893 | /* source.c */ | |
894 | int identify_source_line (); | |
895 | void print_source_lines (); | |
e1ce8aa5 JK |
896 | void forget_cached_source_info ( |
897 | #ifdef __STDC__ | |
898 | void | |
899 | #endif | |
900 | ); | |
901 | void select_source_symtab ( | |
902 | #ifdef __STDC__ | |
903 | struct symtab * | |
904 | #endif | |
905 | ); | |
bd5635a1 RP |
906 | |
907 | char **make_symbol_completion_list (); | |
908 | ||
4a35d6e9 FF |
909 | /* Maximum and minimum values of built-in types */ |
910 | #define MAX_OF_TYPE(t) \ | |
911 | TYPE_UNSIGNED(t) ? UMAX_OF_SIZE(TYPE_LENGTH(t)) : MAX_OF_SIZE(TYPE_LENGTH(t)) | |
912 | ||
913 | #define MIN_OF_TYPE(t) \ | |
914 | TYPE_UNSIGNED(t) ? UMIN_OF_SIZE(TYPE_LENGTH(t)) : MIN_OF_SIZE(TYPE_LENGTH(t)) | |
915 | ||
bd5635a1 | 916 | #endif /* symtab.h not already included. */ |