7b4ac7e1 |
1 | /* Read coff symbol tables and convert to internal format, for GDB. |
2 | Design and support routines derived from dbxread.c, and UMAX COFF |
3 | specific routines written 9/1/87 by David D. Johnson, Brown University. |
4 | Revised 11/27/87 ddj@cs.brown.edu |
e91b87a3 |
5 | Copyright (C) 1987, 1988, 1989 Free Software Foundation, Inc. |
7b4ac7e1 |
6 | |
4187119d |
7 | This file is part of GDB. |
8 | |
9 | GDB is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by |
11 | the Free Software Foundation; either version 1, or (at your option) |
12 | any later version. |
13 | |
14 | GDB is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 | GNU General Public License for more details. |
18 | |
19 | You should have received a copy of the GNU General Public License |
20 | along with GDB; see the file COPYING. If not, write to |
21 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
7b4ac7e1 |
22 | \f |
7a67dd45 |
23 | #include <stdio.h> |
7b4ac7e1 |
24 | #include "defs.h" |
25 | #include "param.h" |
26 | #ifdef COFF_FORMAT |
7b4ac7e1 |
27 | #include "symtab.h" |
28 | |
e91b87a3 |
29 | #ifdef USG |
30 | #include <sys/types.h> |
31 | #include <fcntl.h> |
32 | #endif |
33 | |
7b4ac7e1 |
34 | #include <a.out.h> |
7b4ac7e1 |
35 | #include <obstack.h> |
7b4ac7e1 |
36 | #include <sys/param.h> |
37 | #include <sys/file.h> |
38 | |
39 | static void add_symbol_to_list (); |
40 | static void read_coff_symtab (); |
41 | static void patch_opaque_types (); |
42 | static struct type *decode_function_type (); |
43 | static struct type *decode_type (); |
44 | static struct type *decode_base_type (); |
45 | static struct type *read_enum_type (); |
46 | static struct type *read_struct_type (); |
47 | static void finish_block (); |
48 | static struct blockvector *make_blockvector (); |
49 | static struct symbol *process_coff_symbol (); |
50 | static int init_stringtab (); |
51 | static void free_stringtab (); |
52 | static char *getfilename (); |
53 | static char *getsymname (); |
54 | static int init_lineno (); |
55 | static void enter_linenos (); |
56 | |
4187119d |
57 | extern int fclose (); |
3bf57d21 |
58 | extern void free_all_symtabs (); |
e91b87a3 |
59 | extern void free_all_psymtabs (); |
3bf57d21 |
60 | |
7b4ac7e1 |
61 | |
62 | /* Name of source file whose symbol data we are now processing. |
63 | This comes from a symbol named ".file". */ |
64 | |
65 | static char *last_source_file; |
66 | |
67 | /* Core address of start and end of text of current source file. |
68 | This comes from a ".text" symbol where x_nlinno > 0. */ |
69 | |
70 | static CORE_ADDR cur_src_start_addr; |
71 | static CORE_ADDR cur_src_end_addr; |
72 | |
4187119d |
73 | /* Core address of the end of the first object file. */ |
74 | static CORE_ADDR first_object_file_end; |
75 | |
7b4ac7e1 |
76 | /* End of the text segment of the executable file, |
77 | as found in the symbol _etext. */ |
78 | |
79 | static CORE_ADDR end_of_text_addr; |
80 | |
81 | /* The addresses of the symbol table stream and number of symbols |
82 | of the object file we are reading (as copied into core). */ |
83 | |
84 | static FILE *nlist_stream_global; |
85 | static int nlist_nsyms_global; |
86 | |
4187119d |
87 | /* The file, a.out and text section headers of the symbol file */ |
7b4ac7e1 |
88 | |
89 | static FILHDR file_hdr; |
90 | static SCNHDR text_hdr; |
4187119d |
91 | static AOUTHDR aout_hdr; |
7b4ac7e1 |
92 | |
93 | /* The index in the symbol table of the last coff symbol that was processed. */ |
94 | |
95 | static int symnum; |
96 | |
97 | /* Vector of types defined so far, indexed by their coff symnum. */ |
98 | |
99 | static struct typevector *type_vector; |
100 | |
101 | /* Number of elements allocated for type_vector currently. */ |
102 | |
103 | static int type_vector_length; |
104 | |
105 | /* Vector of line number information. */ |
106 | |
107 | static struct linetable *line_vector; |
108 | |
109 | /* Index of next entry to go in line_vector_index. */ |
110 | |
111 | static int line_vector_index; |
112 | |
113 | /* Last line number recorded in the line vector. */ |
114 | |
115 | static int prev_line_number; |
116 | |
117 | /* Number of elements allocated for line_vector currently. */ |
118 | |
119 | static int line_vector_length; |
120 | |
121 | /* Chain of typedefs of pointers to empty struct/union types. |
122 | They are chained thru the SYMBOL_VALUE. */ |
123 | |
124 | #define HASHSIZE 127 |
125 | static struct symbol *opaque_type_chain[HASHSIZE]; |
126 | |
127 | /* Record the symbols defined for each context in a list. |
128 | We don't create a struct block for the context until we |
129 | know how long to make it. */ |
130 | |
131 | struct pending |
132 | { |
133 | struct pending *next; |
134 | struct symbol *symbol; |
135 | }; |
136 | |
137 | /* Here are the three lists that symbols are put on. */ |
138 | |
139 | struct pending *file_symbols; /* static at top level, and types */ |
140 | |
141 | struct pending *global_symbols; /* global functions and variables */ |
142 | |
143 | struct pending *local_symbols; /* everything local to lexical context */ |
144 | |
145 | /* List of unclosed lexical contexts |
146 | (that will become blocks, eventually). */ |
147 | |
148 | struct context_stack |
149 | { |
150 | struct context_stack *next; |
151 | struct pending *locals; |
152 | struct pending_block *old_blocks; |
153 | struct symbol *name; |
154 | CORE_ADDR start_addr; |
155 | int depth; |
156 | }; |
157 | |
158 | struct context_stack *context_stack; |
159 | |
160 | /* Nonzero if within a function (so symbols should be local, |
161 | if nothing says specifically). */ |
162 | |
163 | int within_function; |
164 | |
165 | /* List of blocks already made (lexical contexts already closed). |
166 | This is used at the end to make the blockvector. */ |
167 | |
168 | struct pending_block |
169 | { |
170 | struct pending_block *next; |
171 | struct block *block; |
172 | }; |
173 | |
174 | struct pending_block *pending_blocks; |
175 | |
4187119d |
176 | extern CORE_ADDR startup_file_start; /* From blockframe.c */ |
177 | extern CORE_ADDR startup_file_end; /* From blockframe.c */ |
7b4ac7e1 |
178 | |
179 | /* File name symbols were loaded from. */ |
180 | |
181 | static char *symfile; |
7b4ac7e1 |
182 | \f |
183 | /* Look up a coff type-number index. Return the address of the slot |
184 | where the type for that index is stored. |
185 | The type-number is in INDEX. |
186 | |
187 | This can be used for finding the type associated with that index |
188 | or for associating a new type with the index. */ |
189 | |
190 | static struct type ** |
191 | coff_lookup_type (index) |
192 | register int index; |
193 | { |
194 | if (index >= type_vector_length) |
195 | { |
e91b87a3 |
196 | int old_vector_length = type_vector_length; |
197 | |
7b4ac7e1 |
198 | type_vector_length *= 2; |
e91b87a3 |
199 | if (type_vector_length < index) { |
200 | type_vector_length = index * 2; |
201 | } |
7b4ac7e1 |
202 | type_vector = (struct typevector *) |
203 | xrealloc (type_vector, sizeof (struct typevector) |
204 | + type_vector_length * sizeof (struct type *)); |
e91b87a3 |
205 | bzero (&type_vector->type[ old_vector_length ], |
206 | (type_vector_length - old_vector_length) * sizeof(struct type *)); |
7b4ac7e1 |
207 | } |
208 | return &type_vector->type[index]; |
209 | } |
210 | |
211 | /* Make sure there is a type allocated for type number index |
212 | and return the type object. |
213 | This can create an empty (zeroed) type object. */ |
214 | |
215 | static struct type * |
216 | coff_alloc_type (index) |
217 | int index; |
218 | { |
219 | register struct type **type_addr = coff_lookup_type (index); |
220 | register struct type *type = *type_addr; |
221 | |
222 | /* If we are referring to a type not known at all yet, |
223 | allocate an empty type for it. |
224 | We will fill it in later if we find out how. */ |
225 | if (type == 0) |
226 | { |
227 | type = (struct type *) obstack_alloc (symbol_obstack, |
228 | sizeof (struct type)); |
229 | bzero (type, sizeof (struct type)); |
230 | *type_addr = type; |
231 | } |
232 | return type; |
233 | } |
234 | \f |
235 | /* maintain the lists of symbols and blocks */ |
236 | |
237 | /* Add a symbol to one of the lists of symbols. */ |
238 | static void |
239 | add_symbol_to_list (symbol, listhead) |
240 | struct symbol *symbol; |
241 | struct pending **listhead; |
242 | { |
243 | register struct pending *link |
244 | = (struct pending *) xmalloc (sizeof (struct pending)); |
245 | |
246 | link->next = *listhead; |
247 | link->symbol = symbol; |
248 | *listhead = link; |
249 | } |
250 | |
251 | /* Take one of the lists of symbols and make a block from it. |
252 | Put the block on the list of pending blocks. */ |
253 | |
254 | static void |
255 | finish_block (symbol, listhead, old_blocks, start, end) |
256 | struct symbol *symbol; |
257 | struct pending **listhead; |
258 | struct pending_block *old_blocks; |
259 | CORE_ADDR start, end; |
260 | { |
261 | register struct pending *next, *next1; |
262 | register struct block *block; |
263 | register struct pending_block *pblock; |
264 | struct pending_block *opblock; |
265 | register int i; |
266 | |
267 | /* Count the length of the list of symbols. */ |
268 | |
269 | for (next = *listhead, i = 0; next; next = next->next, i++); |
270 | |
3bf57d21 |
271 | block = (struct block *) |
272 | obstack_alloc (symbol_obstack, sizeof (struct block) + (i - 1) * sizeof (struct symbol *)); |
7b4ac7e1 |
273 | |
274 | /* Copy the symbols into the block. */ |
275 | |
276 | BLOCK_NSYMS (block) = i; |
277 | for (next = *listhead; next; next = next->next) |
278 | BLOCK_SYM (block, --i) = next->symbol; |
279 | |
280 | BLOCK_START (block) = start; |
281 | BLOCK_END (block) = end; |
282 | BLOCK_SUPERBLOCK (block) = 0; /* Filled in when containing block is made */ |
283 | |
284 | /* Put the block in as the value of the symbol that names it. */ |
285 | |
286 | if (symbol) |
287 | { |
288 | SYMBOL_BLOCK_VALUE (symbol) = block; |
289 | BLOCK_FUNCTION (block) = symbol; |
290 | } |
291 | else |
292 | BLOCK_FUNCTION (block) = 0; |
293 | |
294 | /* Now free the links of the list, and empty the list. */ |
295 | |
296 | for (next = *listhead; next; next = next1) |
297 | { |
298 | next1 = next->next; |
299 | free (next); |
300 | } |
301 | *listhead = 0; |
302 | |
303 | /* Install this block as the superblock |
304 | of all blocks made since the start of this scope |
305 | that don't have superblocks yet. */ |
306 | |
307 | opblock = 0; |
308 | for (pblock = pending_blocks; pblock != old_blocks; pblock = pblock->next) |
309 | { |
310 | if (BLOCK_SUPERBLOCK (pblock->block) == 0) |
311 | BLOCK_SUPERBLOCK (pblock->block) = block; |
312 | opblock = pblock; |
313 | } |
314 | |
315 | /* Record this block on the list of all blocks in the file. |
316 | Put it after opblock, or at the beginning if opblock is 0. |
317 | This puts the block in the list after all its subblocks. */ |
318 | |
319 | pblock = (struct pending_block *) xmalloc (sizeof (struct pending_block)); |
320 | pblock->block = block; |
321 | if (opblock) |
322 | { |
323 | pblock->next = opblock->next; |
324 | opblock->next = pblock; |
325 | } |
326 | else |
327 | { |
328 | pblock->next = pending_blocks; |
329 | pending_blocks = pblock; |
330 | } |
331 | } |
332 | |
333 | static struct blockvector * |
334 | make_blockvector () |
335 | { |
336 | register struct pending_block *next, *next1; |
337 | register struct blockvector *blockvector; |
338 | register int i; |
339 | |
340 | /* Count the length of the list of blocks. */ |
341 | |
342 | for (next = pending_blocks, i = 0; next; next = next->next, i++); |
343 | |
3bf57d21 |
344 | blockvector = (struct blockvector *) |
345 | obstack_alloc (symbol_obstack, sizeof (struct blockvector) + (i - 1) * sizeof (struct block *)); |
7b4ac7e1 |
346 | |
347 | /* Copy the blocks into the blockvector. |
348 | This is done in reverse order, which happens to put |
349 | the blocks into the proper order (ascending starting address). |
350 | finish_block has hair to insert each block into the list |
351 | after its subblocks in order to make sure this is true. */ |
352 | |
353 | BLOCKVECTOR_NBLOCKS (blockvector) = i; |
354 | for (next = pending_blocks; next; next = next->next) |
355 | BLOCKVECTOR_BLOCK (blockvector, --i) = next->block; |
356 | |
357 | /* Now free the links of the list, and empty the list. */ |
358 | |
359 | for (next = pending_blocks; next; next = next1) |
360 | { |
361 | next1 = next->next; |
362 | free (next); |
363 | } |
364 | pending_blocks = 0; |
365 | |
366 | return blockvector; |
367 | } |
368 | |
369 | /* Manage the vector of line numbers. */ |
370 | |
371 | static |
372 | record_line (line, pc) |
373 | int line; |
374 | CORE_ADDR pc; |
375 | { |
e91b87a3 |
376 | struct linetable_entry *e; |
7b4ac7e1 |
377 | /* Make sure line vector is big enough. */ |
378 | |
379 | if (line_vector_index + 2 >= line_vector_length) |
380 | { |
381 | line_vector_length *= 2; |
382 | line_vector = (struct linetable *) |
383 | xrealloc (line_vector, sizeof (struct linetable) |
e91b87a3 |
384 | + (line_vector_length |
385 | * sizeof (struct linetable_entry))); |
7b4ac7e1 |
386 | } |
387 | |
e91b87a3 |
388 | e = line_vector->item + line_vector_index++; |
389 | e->line = line; e->pc = pc; |
7b4ac7e1 |
390 | } |
391 | \f |
392 | /* Start a new symtab for a new source file. |
393 | This is called when a COFF ".file" symbol is seen; |
394 | it indicates the start of data for one original source file. */ |
395 | |
396 | static void |
397 | start_symtab () |
398 | { |
399 | file_symbols = 0; |
400 | global_symbols = 0; |
401 | context_stack = 0; |
402 | within_function = 0; |
403 | last_source_file = 0; |
404 | |
405 | /* Initialize the source file information for this file. */ |
406 | |
407 | line_vector_index = 0; |
408 | line_vector_length = 1000; |
409 | prev_line_number = -2; /* Force first line number to be explicit */ |
410 | line_vector = (struct linetable *) |
e91b87a3 |
411 | xmalloc (sizeof (struct linetable) |
412 | + line_vector_length * sizeof (struct linetable_entry)); |
7b4ac7e1 |
413 | } |
414 | |
415 | /* Save the vital information for use when closing off the current file. |
416 | NAME is the file name the symbols came from, START_ADDR is the first |
417 | text address for the file, and SIZE is the number of bytes of text. */ |
418 | |
419 | static void |
420 | complete_symtab (name, start_addr, size) |
421 | char *name; |
422 | CORE_ADDR start_addr; |
423 | unsigned int size; |
424 | { |
425 | last_source_file = savestring (name, strlen (name)); |
426 | cur_src_start_addr = start_addr; |
427 | cur_src_end_addr = start_addr + size; |
4187119d |
428 | |
429 | if (aout_hdr.entry < cur_src_end_addr |
430 | && aout_hdr.entry >= cur_src_start_addr) |
431 | { |
432 | startup_file_start = cur_src_start_addr; |
433 | startup_file_end = cur_src_end_addr; |
434 | } |
7b4ac7e1 |
435 | } |
436 | |
437 | /* Finish the symbol definitions for one main source file, |
438 | close off all the lexical contexts for that file |
439 | (creating struct block's for them), then make the |
bb7592f0 |
440 | struct symtab for that file and put it in the list of all such. */ |
441 | |
442 | static void |
443 | end_symtab () |
444 | { |
445 | register struct symtab *symtab; |
446 | register struct context_stack *cstk; |
447 | register struct blockvector *blockvector; |
448 | register struct linetable *lv; |
449 | |
450 | /* Finish the lexical context of the last function in the file. */ |
451 | |
452 | if (context_stack) |
453 | { |
454 | cstk = context_stack; |
e91b87a3 |
455 | context_stack = 0; |
bb7592f0 |
456 | /* Make a block for the local symbols within. */ |
457 | finish_block (cstk->name, &local_symbols, cstk->old_blocks, |
458 | cstk->start_addr, cur_src_end_addr); |
459 | free (cstk); |
460 | } |
461 | |
e91b87a3 |
462 | /* Ignore a file that has no functions with real debugging info. */ |
463 | if (pending_blocks == 0 && file_symbols == 0 && global_symbols == 0) |
464 | { |
465 | free (line_vector); |
466 | line_vector = 0; |
467 | line_vector_length = -1; |
468 | last_source_file = 0; |
469 | return; |
470 | } |
471 | |
472 | /* Create the two top-level blocks for this file. */ |
bb7592f0 |
473 | finish_block (0, &file_symbols, 0, cur_src_start_addr, cur_src_end_addr); |
474 | finish_block (0, &global_symbols, 0, cur_src_start_addr, cur_src_end_addr); |
bb7592f0 |
475 | |
e91b87a3 |
476 | /* Create the blockvector that points to all the file's blocks. */ |
477 | blockvector = make_blockvector (); |
bb7592f0 |
478 | |
e91b87a3 |
479 | /* Now create the symtab object for this source file. */ |
bb7592f0 |
480 | symtab = (struct symtab *) xmalloc (sizeof (struct symtab)); |
481 | symtab->free_ptr = 0; |
482 | |
483 | /* Fill in its components. */ |
484 | symtab->blockvector = blockvector; |
485 | symtab->free_code = free_linetable; |
486 | symtab->filename = last_source_file; |
487 | lv = line_vector; |
488 | lv->nitems = line_vector_index; |
489 | symtab->linetable = (struct linetable *) |
e91b87a3 |
490 | xrealloc (lv, (sizeof (struct linetable) |
491 | + lv->nitems * sizeof (struct linetable_entry))); |
bb7592f0 |
492 | symtab->nlines = 0; |
493 | symtab->line_charpos = 0; |
494 | |
495 | /* Link the new symtab into the list of such. */ |
496 | symtab->next = symtab_list; |
497 | symtab_list = symtab; |
498 | |
e91b87a3 |
499 | /* Reinitialize for beginning of new file. */ |
bb7592f0 |
500 | line_vector = 0; |
501 | line_vector_length = -1; |
502 | last_source_file = 0; |
503 | } |
504 | \f |
505 | /* Accumulate the misc functions in bunches of 127. |
506 | At the end, copy them all into one newly allocated structure. */ |
507 | |
508 | #define MISC_BUNCH_SIZE 127 |
509 | |
510 | struct misc_bunch |
511 | { |
512 | struct misc_bunch *next; |
513 | struct misc_function contents[MISC_BUNCH_SIZE]; |
514 | }; |
515 | |
516 | /* Bunch currently being filled up. |
517 | The next field points to chain of filled bunches. */ |
518 | |
519 | static struct misc_bunch *misc_bunch; |
520 | |
521 | /* Number of slots filled in current bunch. */ |
522 | |
523 | static int misc_bunch_index; |
524 | |
525 | /* Total number of misc functions recorded so far. */ |
526 | |
527 | static int misc_count; |
528 | |
529 | static void |
530 | init_misc_functions () |
531 | { |
532 | misc_count = 0; |
533 | misc_bunch = 0; |
534 | misc_bunch_index = MISC_BUNCH_SIZE; |
535 | } |
536 | |
537 | static void |
538 | record_misc_function (name, address) |
539 | char *name; |
540 | CORE_ADDR address; |
541 | { |
542 | register struct misc_bunch *new; |
543 | |
544 | if (misc_bunch_index == MISC_BUNCH_SIZE) |
545 | { |
546 | new = (struct misc_bunch *) xmalloc (sizeof (struct misc_bunch)); |
547 | misc_bunch_index = 0; |
548 | new->next = misc_bunch; |
549 | misc_bunch = new; |
550 | } |
551 | misc_bunch->contents[misc_bunch_index].name = savestring (name, strlen (name)); |
552 | misc_bunch->contents[misc_bunch_index].address = address; |
4187119d |
553 | misc_bunch->contents[misc_bunch_index].type = mf_unknown; |
bb7592f0 |
554 | misc_bunch_index++; |
555 | misc_count++; |
556 | } |
557 | |
e91b87a3 |
558 | /* if we see a function symbol, we do record_misc_function. |
559 | * however, if it turns out the next symbol is '.bf', then |
560 | * we call here to undo the misc definition |
561 | */ |
562 | static void |
563 | unrecord_misc_function () |
564 | { |
565 | if (misc_bunch_index == 0) |
566 | error ("Internal error processing symbol table, at symbol %d.", |
567 | symnum); |
568 | misc_bunch_index--; |
569 | misc_count--; |
570 | } |
571 | |
572 | |
bb7592f0 |
573 | static int |
574 | compare_misc_functions (fn1, fn2) |
575 | struct misc_function *fn1, *fn2; |
576 | { |
577 | /* Return a signed result based on unsigned comparisons |
578 | so that we sort into unsigned numeric order. */ |
579 | if (fn1->address < fn2->address) |
580 | return -1; |
581 | if (fn1->address > fn2->address) |
582 | return 1; |
583 | return 0; |
584 | } |
585 | |
586 | static void |
587 | discard_misc_bunches () |
588 | { |
589 | register struct misc_bunch *next; |
590 | |
591 | while (misc_bunch) |
592 | { |
593 | next = misc_bunch->next; |
594 | free (misc_bunch); |
595 | misc_bunch = next; |
596 | } |
597 | } |
598 | |
599 | static void |
600 | condense_misc_bunches () |
601 | { |
602 | register int i, j; |
603 | register struct misc_bunch *bunch; |
604 | #ifdef NAMES_HAVE_UNDERSCORE |
605 | int offset = 1; |
606 | #else |
607 | int offset = 0; |
608 | #endif |
609 | |
610 | misc_function_vector |
611 | = (struct misc_function *) |
612 | xmalloc (misc_count * sizeof (struct misc_function)); |
613 | |
614 | j = 0; |
615 | bunch = misc_bunch; |
616 | while (bunch) |
617 | { |
618 | for (i = 0; i < misc_bunch_index; i++) |
619 | { |
620 | register char *tmp; |
621 | |
622 | misc_function_vector[j] = bunch->contents[i]; |
623 | tmp = misc_function_vector[j].name; |
624 | misc_function_vector[j].name = (tmp[0] == '_' ? tmp + offset : tmp); |
625 | j++; |
626 | } |
627 | bunch = bunch->next; |
628 | misc_bunch_index = MISC_BUNCH_SIZE; |
629 | } |
630 | |
631 | misc_function_count = j; |
632 | |
633 | /* Sort the misc functions by address. */ |
634 | |
635 | qsort (misc_function_vector, j, sizeof (struct misc_function), |
636 | compare_misc_functions); |
637 | } |
638 | |
639 | /* Call sort_syms to sort alphabetically |
640 | the symbols of each block of each symtab. */ |
641 | |
642 | static int |
643 | compare_symbols (s1, s2) |
644 | struct symbol **s1, **s2; |
645 | { |
646 | /* Names that are less should come first. */ |
647 | register int namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2)); |
648 | if (namediff != 0) return namediff; |
649 | /* For symbols of the same name, registers should come first. */ |
650 | return ((SYMBOL_CLASS (*s2) == LOC_REGISTER) |
651 | - (SYMBOL_CLASS (*s1) == LOC_REGISTER)); |
652 | } |
653 | |
654 | static void |
655 | sort_syms () |
656 | { |
657 | register struct symtab *s; |
658 | register int i, nbl; |
659 | register struct blockvector *bv; |
660 | register struct block *b; |
661 | |
662 | for (s = symtab_list; s; s = s->next) |
663 | { |
664 | bv = BLOCKVECTOR (s); |
665 | nbl = BLOCKVECTOR_NBLOCKS (bv); |
666 | for (i = 0; i < nbl; i++) |
667 | { |
668 | b = BLOCKVECTOR_BLOCK (bv, i); |
e91b87a3 |
669 | if (BLOCK_SHOULD_SORT (b)) |
670 | qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), |
671 | sizeof (struct symbol *), compare_symbols); |
bb7592f0 |
672 | } |
673 | } |
674 | } |
675 | \f |
676 | /* This is the symbol-file command. Read the file, analyze its symbols, |
677 | and add a struct symtab to symtab_list. */ |
678 | |
679 | void |
680 | symbol_file_command (name) |
681 | char *name; |
682 | { |
683 | int desc; |
684 | int num_symbols; |
685 | int num_sections; |
686 | int symtab_offset; |
687 | extern void close (); |
688 | register int val; |
689 | struct cleanup *old_chain; |
690 | |
691 | dont_repeat (); |
692 | |
693 | if (name == 0) |
694 | { |
695 | if (symtab_list && !query ("Discard symbol table? ", 0)) |
696 | error ("Not confirmed."); |
e91b87a3 |
697 | if (symfile) |
698 | free (symfile); |
699 | symfile = 0; |
bb7592f0 |
700 | free_all_symtabs (); |
701 | return; |
702 | } |
703 | |
4187119d |
704 | name = tilde_expand (name); |
705 | make_cleanup (free, name); |
706 | |
bb7592f0 |
707 | if (symtab_list && !query ("Load new symbol table from \"%s\"? ", name)) |
708 | error ("Not confirmed."); |
709 | |
710 | if (symfile) |
711 | free (symfile); |
712 | symfile = 0; |
713 | |
714 | { |
715 | char *absolute_name; |
716 | |
717 | desc = openp (getenv ("PATH"), 1, name, O_RDONLY, 0, &absolute_name); |
718 | if (desc < 0) |
719 | perror_with_name (name); |
720 | else |
721 | name = absolute_name; |
722 | } |
723 | |
724 | old_chain = make_cleanup (close, desc); |
725 | make_cleanup (free_current_contents, &name); |
726 | |
727 | if ((num_symbols = read_file_hdr (desc, &file_hdr)) < 0) |
728 | error ("File \"%s\" not in executable format.", name); |
729 | |
4187119d |
730 | /* If an a.out header is present, read it in. If not (e.g. a .o file) |
731 | deal with its absence. */ |
732 | if (file_hdr.f_opthdr == 0 |
733 | || read_aout_hdr (desc, &aout_hdr, file_hdr.f_opthdr) < 0) |
734 | { |
735 | /* We will not actually be able to run code, since backtraces would |
736 | fly off the bottom of the stack (there is no way to reliably |
737 | detect bottom of stack), but that's fine since the kernel won't |
738 | run something without an a.out header anyway. Passive examination |
739 | of .o files is one place this might make sense. */ |
740 | /* ~0 will not be in any file. */ |
741 | aout_hdr.entry = ~0; |
742 | /* set the startup file to be an empty range. */ |
743 | startup_file_start = 0; |
744 | startup_file_end = 0; |
745 | } |
746 | |
bb7592f0 |
747 | if (num_symbols == 0) |
748 | { |
749 | free_all_symtabs (); |
1c997a4a |
750 | error ("%s does not have a symbol-table.\n", name); |
bb7592f0 |
751 | } |
752 | |
753 | printf ("Reading symbol data from %s...", name); |
754 | fflush (stdout); |
755 | |
756 | /* Throw away the old symbol table. */ |
757 | |
758 | free_all_symtabs (); |
e91b87a3 |
759 | free_all_psymtabs (); /* Make sure that partial_symtab_list */ |
760 | /* is 0 also. */ |
bb7592f0 |
761 | |
762 | num_sections = file_hdr.f_nscns; |
763 | symtab_offset = file_hdr.f_symptr; |
764 | |
7a67dd45 |
765 | if (read_section_hdr (desc, _TEXT, &text_hdr, num_sections, |
766 | file_hdr.f_opthdr) < 0) |
bb7592f0 |
767 | error ("\"%s\": can't read text section header", name); |
768 | |
769 | /* Read the line number table, all at once. */ |
770 | |
771 | val = init_lineno (desc, text_hdr.s_lnnoptr, text_hdr.s_nlnno); |
772 | if (val < 0) |
773 | error ("\"%s\": error reading line numbers\n", name); |
774 | |
775 | /* Now read the string table, all at once. */ |
776 | |
777 | val = init_stringtab (desc, symtab_offset + num_symbols * SYMESZ); |
778 | if (val < 0) |
779 | { |
780 | free_all_symtabs (); |
781 | printf ("\"%s\": can't get string table", name); |
782 | fflush (stdout); |
783 | return; |
784 | } |
785 | make_cleanup (free_stringtab, 0); |
786 | |
787 | /* Position to read the symbol table. Do not read it all at once. */ |
788 | val = lseek (desc, (long)symtab_offset, 0); |
789 | if (val < 0) |
790 | perror_with_name (name); |
791 | |
792 | init_misc_functions (); |
793 | make_cleanup (discard_misc_bunches, 0); |
794 | |
795 | /* Now that the executable file is positioned at symbol table, |
796 | process it and define symbols accordingly. */ |
797 | |
798 | read_coff_symtab (desc, num_symbols); |
799 | |
800 | patch_opaque_types (); |
801 | |
802 | /* Sort symbols alphabetically within each block. */ |
803 | |
804 | sort_syms (); |
805 | |
806 | /* Go over the misc functions and install them in vector. */ |
807 | |
808 | condense_misc_bunches (); |
809 | |
810 | /* Don't allow char * to have a typename (else would get caddr_t.) */ |
811 | |
812 | TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; |
813 | |
814 | /* Make a default for file to list. */ |
815 | |
1c997a4a |
816 | select_source_symtab (0); |
bb7592f0 |
817 | |
818 | symfile = savestring (name, strlen (name)); |
819 | |
820 | do_cleanups (old_chain); |
821 | |
822 | printf ("done.\n"); |
823 | fflush (stdout); |
824 | } |
825 | |
826 | /* Return name of file symbols were loaded from, or 0 if none.. */ |
827 | |
828 | char * |
829 | get_sym_file () |
830 | { |
831 | return symfile; |
832 | } |
833 | \f |
834 | /* Simplified internal version of coff symbol table information */ |
835 | |
836 | struct coff_symbol { |
837 | char *c_name; |
838 | int c_symnum; /* symbol number of this entry */ |
839 | int c_nsyms; /* 1 if syment only, 2 if syment + auxent */ |
840 | long c_value; |
841 | int c_sclass; |
842 | int c_secnum; |
843 | unsigned int c_type; |
844 | }; |
845 | |
846 | /* Given pointers to a symbol table in coff style exec file, |
847 | analyze them and create struct symtab's describing the symbols. |
848 | NSYMS is the number of symbols in the symbol table. |
849 | We read them one at a time using read_one_sym (). */ |
850 | |
851 | static void |
852 | read_coff_symtab (desc, nsyms) |
853 | int desc; |
854 | int nsyms; |
855 | { |
e91b87a3 |
856 | int newfd; /* Avoid multiple closes on same desc */ |
857 | FILE *stream; |
bb7592f0 |
858 | register struct context_stack *new; |
859 | struct coff_symbol coff_symbol; |
860 | register struct coff_symbol *cs = &coff_symbol; |
861 | static SYMENT main_sym; |
862 | static AUXENT main_aux; |
e91b87a3 |
863 | struct coff_symbol fcn_cs_saved; |
864 | static SYMENT fcn_sym_saved; |
865 | static AUXENT fcn_aux_saved; |
bb7592f0 |
866 | |
867 | int num_object_files = 0; |
e91b87a3 |
868 | int next_file_symnum = -1; |
7a67dd45 |
869 | |
870 | /* Name of the current file. */ |
871 | char *filestring = ""; |
bb7592f0 |
872 | int depth; |
873 | int fcn_first_line; |
874 | int fcn_last_line; |
e91b87a3 |
875 | int fcn_start_addr; |
bb7592f0 |
876 | long fcn_line_ptr; |
877 | struct cleanup *old_chain; |
4187119d |
878 | |
e91b87a3 |
879 | |
880 | newfd = dup (desc); |
881 | if (newfd == -1) |
882 | fatal ("Too many open files"); |
883 | stream = fdopen (newfd, "r"); |
bb7592f0 |
884 | |
885 | old_chain = make_cleanup (free_all_symtabs, 0); |
e91b87a3 |
886 | make_cleanup (fclose, stream); |
bb7592f0 |
887 | nlist_stream_global = stream; |
888 | nlist_nsyms_global = nsyms; |
889 | last_source_file = 0; |
890 | bzero (opaque_type_chain, sizeof opaque_type_chain); |
891 | |
892 | type_vector_length = 160; |
893 | type_vector = (struct typevector *) |
894 | xmalloc (sizeof (struct typevector) |
895 | + type_vector_length * sizeof (struct type *)); |
896 | bzero (type_vector->type, type_vector_length * sizeof (struct type *)); |
897 | |
898 | start_symtab (); |
899 | |
900 | symnum = 0; |
901 | while (symnum < nsyms) |
902 | { |
903 | QUIT; /* Make this command interruptable. */ |
904 | read_one_sym (cs, &main_sym, &main_aux); |
905 | |
906 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) |
907 | { |
908 | CORE_ADDR last_file_end = cur_src_end_addr; |
909 | |
910 | if (last_source_file) |
911 | end_symtab (); |
912 | |
913 | start_symtab (); |
914 | complete_symtab ("_globals_", 0, first_object_file_end); |
915 | /* done with all files, everything from here on out is globals */ |
916 | } |
917 | |
918 | /* Special case for file with type declarations only, no text. */ |
919 | if (!last_source_file && cs->c_type != T_NULL && cs->c_secnum == N_DEBUG) |
920 | complete_symtab (filestring, 0, 0); |
921 | |
e91b87a3 |
922 | /* Typedefs should not be treated as symbol definitions. */ |
923 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) |
bb7592f0 |
924 | { |
e91b87a3 |
925 | /* record as misc function. if we get '.bf' next, |
926 | * then we undo this step |
bb7592f0 |
927 | */ |
928 | record_misc_function (cs->c_name, cs->c_value); |
929 | |
930 | fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; |
e91b87a3 |
931 | fcn_start_addr = cs->c_value; |
932 | fcn_cs_saved = *cs; |
933 | fcn_sym_saved = main_sym; |
934 | fcn_aux_saved = main_aux; |
bb7592f0 |
935 | continue; |
936 | } |
937 | |
938 | switch (cs->c_sclass) |
939 | { |
940 | case C_EFCN: |
941 | case C_EXTDEF: |
942 | case C_ULABEL: |
943 | case C_USTATIC: |
944 | case C_LINE: |
945 | case C_ALIAS: |
946 | case C_HIDDEN: |
947 | printf ("Bad n_sclass = %d\n", cs->c_sclass); |
948 | break; |
949 | |
950 | case C_FILE: |
951 | /* |
952 | * c_value field contains symnum of next .file entry in table |
953 | * or symnum of first global after last .file. |
954 | */ |
955 | next_file_symnum = cs->c_value; |
956 | filestring = getfilename (&main_aux); |
957 | /* |
958 | * Complete symbol table for last object file |
959 | * containing debugging information. |
960 | */ |
961 | if (last_source_file) |
962 | { |
963 | end_symtab (); |
964 | start_symtab (); |
965 | } |
966 | num_object_files++; |
967 | break; |
968 | |
e91b87a3 |
969 | case C_STAT: |
970 | if (cs->c_name[0] == '.') { |
971 | if (strcmp (cs->c_name, _TEXT) == 0) { |
972 | if (num_object_files == 1) { |
973 | /* last address of startup file */ |
974 | first_object_file_end = cs->c_value + |
975 | main_aux.x_scn.x_scnlen; |
976 | } |
977 | /* for some reason the old code didn't do |
978 | * this if this section entry had |
979 | * main_aux.x_scn.x_nlinno equal to 0 |
980 | */ |
981 | complete_symtab (filestring, cs->c_value, |
982 | main_aux.x_scn.x_scnlen); |
983 | } |
984 | /* flush rest of '.' symbols */ |
bb7592f0 |
985 | break; |
e91b87a3 |
986 | } |
987 | /* fall in for static symbols that don't start with '.' */ |
988 | case C_EXT: |
989 | if (cs->c_sclass == C_EXT && |
990 | cs->c_secnum == N_ABS && |
991 | strcmp (cs->c_name, _ETEXT) == 0) |
992 | end_of_text_addr = cs->c_value; |
993 | if (cs->c_type == T_NULL) { |
994 | if (cs->c_secnum <= 1) { /* text or abs */ |
995 | record_misc_function (cs->c_name, cs->c_value); |
996 | break; |
997 | } else { |
998 | cs->c_type = T_INT; |
999 | } |
1000 | } |
bb7592f0 |
1001 | (void) process_coff_symbol (cs, &main_aux); |
1002 | break; |
1003 | |
1004 | case C_FCN: |
1005 | if (strcmp (cs->c_name, ".bf") == 0) |
1006 | { |
4187119d |
1007 | #if 0 |
1008 | /* Don't do this; we want all functions to be on the |
1009 | mfl now. */ |
e91b87a3 |
1010 | unrecord_misc_function (); |
4187119d |
1011 | #endif |
e91b87a3 |
1012 | |
1013 | within_function = 1; |
1014 | |
bb7592f0 |
1015 | /* value contains address of first non-init type code */ |
1016 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno |
1017 | contains line number of '{' } */ |
1018 | fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; |
e91b87a3 |
1019 | |
1020 | new = (struct context_stack *) |
1021 | xmalloc (sizeof (struct context_stack)); |
1022 | new->depth = depth = 0; |
1023 | new->next = 0; |
1024 | context_stack = new; |
1025 | new->locals = 0; |
1026 | new->old_blocks = pending_blocks; |
1027 | new->start_addr = fcn_start_addr; |
1028 | fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); |
1029 | new->name = process_coff_symbol (&fcn_cs_saved, |
1030 | &fcn_aux_saved); |
bb7592f0 |
1031 | } |
1032 | else if (strcmp (cs->c_name, ".ef") == 0) |
1033 | { |
e91b87a3 |
1034 | /* the value of .ef is the address of epilogue code; |
1035 | * not useful for gdb |
1036 | */ |
bb7592f0 |
1037 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno |
1038 | contains number of lines to '}' */ |
1039 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; |
1040 | enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line); |
bb7592f0 |
1041 | new = context_stack; |
e91b87a3 |
1042 | |
1043 | if (new == 0) |
1044 | error ("Invalid symbol data; .bf/.ef/.bb/.eb symbol mismatch, at symbol %d.", |
1045 | symnum); |
1046 | |
bb7592f0 |
1047 | finish_block (new->name, &local_symbols, new->old_blocks, |
e91b87a3 |
1048 | new->start_addr, |
1049 | fcn_cs_saved.c_value + |
1050 | fcn_aux_saved.x_sym.x_misc.x_fsize); |
bb7592f0 |
1051 | context_stack = 0; |
1052 | within_function = 0; |
1053 | free (new); |
1054 | } |
1055 | break; |
1056 | |
1057 | case C_BLOCK: |
1058 | if (strcmp (cs->c_name, ".bb") == 0) |
1059 | { |
1060 | new = (struct context_stack *) |
1061 | xmalloc (sizeof (struct context_stack)); |
1062 | depth++; |
1063 | new->depth = depth; |
1064 | new->next = context_stack; |
1065 | context_stack = new; |
1066 | new->locals = local_symbols; |
1067 | new->old_blocks = pending_blocks; |
1068 | new->start_addr = cs->c_value; |
1069 | new->name = 0; |
1070 | local_symbols = 0; |
1071 | } |
1072 | else if (strcmp (cs->c_name, ".eb") == 0) |
1073 | { |
1074 | new = context_stack; |
1075 | if (new == 0 || depth != new->depth) |
e91b87a3 |
1076 | error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.", |
1077 | symnum); |
bb7592f0 |
1078 | if (local_symbols && context_stack->next) |
1079 | { |
1080 | /* Make a block for the local symbols within. */ |
1081 | finish_block (0, &local_symbols, new->old_blocks, |
1082 | new->start_addr, cs->c_value); |
1083 | } |
1084 | depth--; |
1085 | local_symbols = new->locals; |
1086 | context_stack = new->next; |
1087 | free (new); |
1088 | } |
1089 | break; |
1090 | |
1091 | default: |
1092 | (void) process_coff_symbol (cs, &main_aux); |
1093 | break; |
1094 | } |
1095 | } |
1096 | |
1097 | if (last_source_file) |
1098 | end_symtab (); |
1099 | fclose (stream); |
1100 | discard_cleanups (old_chain); |
1101 | } |
1102 | \f |
1103 | /* Routines for reading headers and symbols from executable. */ |
1104 | |
1105 | /* Read COFF file header, check magic number, |
1106 | and return number of symbols. */ |
1107 | read_file_hdr (chan, file_hdr) |
1108 | int chan; |
1109 | FILHDR *file_hdr; |
1110 | { |
1111 | lseek (chan, 0L, 0); |
1112 | if (myread (chan, (char *)file_hdr, FILHSZ) < 0) |
1113 | return -1; |
1114 | |
1115 | switch (file_hdr->f_magic) |
1116 | { |
4187119d |
1117 | #ifdef MC68MAGIC |
1118 | case MC68MAGIC: |
1119 | #endif |
e91b87a3 |
1120 | #ifdef NS32GMAGIC |
bb7592f0 |
1121 | case NS32GMAGIC: |
1122 | case NS32SMAGIC: |
e91b87a3 |
1123 | #endif |
1124 | #ifdef I386MAGIC |
1125 | case I386MAGIC: |
1126 | #endif |
4187119d |
1127 | #ifdef CLIPPERMAGIC |
1128 | case CLIPPERMAGIC: |
1129 | #endif |
bb7592f0 |
1130 | return file_hdr->f_nsyms; |
1131 | |
1132 | default: |
e91b87a3 |
1133 | #ifdef BADMAG |
1134 | if (BADMAG(file_hdr)) |
4187119d |
1135 | return -1; |
e91b87a3 |
1136 | else |
4187119d |
1137 | return file_hdr->f_nsyms; |
e91b87a3 |
1138 | #else |
bb7592f0 |
1139 | return -1; |
e91b87a3 |
1140 | #endif |
bb7592f0 |
1141 | } |
1142 | } |
1143 | |
1144 | read_aout_hdr (chan, aout_hdr, size) |
1145 | int chan; |
1146 | AOUTHDR *aout_hdr; |
1147 | int size; |
1148 | { |
1149 | lseek (chan, (long)FILHSZ, 0); |
1150 | if (size != sizeof (AOUTHDR)) |
1151 | return -1; |
1152 | if (myread (chan, (char *)aout_hdr, size) != size) |
1153 | return -1; |
1154 | return 0; |
1155 | } |
1156 | |
7a67dd45 |
1157 | /* Read a section header. OPTIONAL_HEADER_SIZE is the size of the |
1158 | optional header (normally f_opthdr from the file header). |
1159 | |
1160 | Return nonnegative for success, -1 for failure. */ |
1161 | int |
1162 | read_section_hdr (chan, section_name, section_hdr, nsects, |
1163 | optional_header_size) |
bb7592f0 |
1164 | register int chan; |
1165 | register char *section_name; |
1166 | SCNHDR *section_hdr; |
1167 | register int nsects; |
7a67dd45 |
1168 | int optional_header_size; |
bb7592f0 |
1169 | { |
1170 | register int i; |
1171 | |
7a67dd45 |
1172 | if (lseek (chan, FILHSZ + optional_header_size, 0) < 0) |
bb7592f0 |
1173 | return -1; |
1174 | |
1175 | for (i = 0; i < nsects; i++) |
1176 | { |
1177 | if (myread (chan, (char *)section_hdr, SCNHSZ) < 0) |
1178 | return -1; |
1179 | if (strncmp (section_hdr->s_name, section_name, 8) == 0) |
1180 | return 0; |
1181 | } |
1182 | return -1; |
1183 | } |
1184 | |
1185 | read_one_sym (cs, sym, aux) |
1186 | register struct coff_symbol *cs; |
1187 | register SYMENT *sym; |
1188 | register AUXENT *aux; |
1189 | { |
1190 | cs->c_symnum = symnum; |
1191 | fread ((char *)sym, SYMESZ, 1, nlist_stream_global); |
1192 | cs->c_nsyms = (sym->n_numaux & 0xff) + 1; |
1193 | if (cs->c_nsyms == 2) |
1194 | { |
1195 | /* doc for coff says there is either no aux entry or just one */ |
1196 | fread ((char *)aux, AUXESZ, 1, nlist_stream_global); |
1197 | } |
1198 | else if (cs->c_nsyms > 2) |
1199 | error ("more than one aux symbol table entry at symnum=%d\n", symnum); |
1200 | |
1201 | cs->c_name = getsymname (sym); |
1202 | cs->c_value = sym->n_value; |
1203 | cs->c_sclass = (sym->n_sclass & 0xff); |
1204 | cs->c_secnum = sym->n_scnum; |
1205 | cs->c_type = (unsigned) sym->n_type; |
1206 | |
1207 | symnum += cs->c_nsyms; |
1208 | } |
1209 | \f |
1210 | /* Support for string table handling */ |
1211 | |
1212 | static char *stringtab = NULL; |
1213 | |
1214 | static int |
1215 | init_stringtab (chan, offset) |
1216 | int chan; |
1217 | long offset; |
1218 | { |
1219 | long buffer; |
1220 | int val; |
1221 | |
e91b87a3 |
1222 | if (stringtab) |
1223 | { |
1224 | free (stringtab); |
1225 | stringtab = NULL; |
1226 | } |
1227 | |
bb7592f0 |
1228 | if (lseek (chan, offset, 0) < 0) |
1229 | return -1; |
1230 | |
1231 | val = myread (chan, (char *)&buffer, sizeof buffer); |
bb7592f0 |
1232 | |
e91b87a3 |
1233 | /* If no string table is needed, then the file may end immediately |
1234 | after the symbols. Just return with `stringtab' set to null. */ |
1235 | if (val != sizeof buffer || buffer == 0) |
1236 | return 0; |
1237 | |
bb7592f0 |
1238 | stringtab = (char *) xmalloc (buffer); |
1239 | if (stringtab == NULL) |
1240 | return -1; |
1241 | |
1242 | bcopy (&buffer, stringtab, sizeof buffer); |
1243 | |
1244 | val = myread (chan, stringtab + sizeof buffer, buffer - sizeof buffer); |
1245 | if (val != buffer - sizeof buffer || stringtab[buffer - 1] != '\0') |
1246 | return -1; |
1247 | |
1248 | return 0; |
1249 | } |
1250 | |
1251 | static void |
1252 | free_stringtab () |
1253 | { |
1254 | if (stringtab) |
1255 | free (stringtab); |
1256 | stringtab = NULL; |
1257 | } |
1258 | |
1259 | static char * |
1260 | getsymname (symbol_entry) |
1261 | SYMENT *symbol_entry; |
1262 | { |
1263 | static char buffer[SYMNMLEN+1]; |
1264 | char *result; |
1265 | |
1266 | if (symbol_entry->n_zeroes == 0) |
1267 | { |
1268 | result = stringtab + symbol_entry->n_offset; |
1269 | } |
1270 | else |
1271 | { |
1272 | strncpy (buffer, symbol_entry->n_name, SYMNMLEN); |
1273 | buffer[SYMNMLEN] = '\0'; |
1274 | result = buffer; |
1275 | } |
1276 | return result; |
1277 | } |
1278 | |
1279 | static char * |
1280 | getfilename (aux_entry) |
1281 | AUXENT *aux_entry; |
1282 | { |
1283 | static char buffer[BUFSIZ]; |
1284 | register char *temp; |
1285 | char *result; |
1286 | extern char *rindex (); |
1287 | |
e91b87a3 |
1288 | #ifndef COFF_NO_LONG_FILE_NAMES |
bb7592f0 |
1289 | if (aux_entry->x_file.x_foff != 0) |
1290 | strcpy (buffer, stringtab + aux_entry->x_file.x_foff); |
1291 | else |
e91b87a3 |
1292 | #endif |
bb7592f0 |
1293 | { |
1294 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); |
1295 | buffer[FILNMLEN] = '\0'; |
1296 | } |
1297 | result = buffer; |
1298 | if ((temp = rindex (result, '/')) != NULL) |
1299 | result = temp + 1; |
1300 | return (result); |
1301 | } |
1302 | |
1303 | /* Support for line number handling */ |
1304 | static char *linetab = NULL; |
1305 | static long linetab_offset; |
1306 | static int linetab_count; |
1307 | |
1308 | static int |
1309 | init_lineno (chan, offset, count) |
1310 | int chan; |
1311 | long offset; |
1312 | int count; |
1313 | { |
1314 | int val; |
1315 | |
1316 | if (lseek (chan, offset, 0) < 0) |
1317 | return -1; |
1318 | |
1319 | if (linetab) |
1320 | free (linetab); |
1321 | linetab = (char *) xmalloc (count * LINESZ); |
1322 | |
1323 | val = myread (chan, linetab, count * LINESZ); |
1324 | if (val != count * LINESZ) |
1325 | return -1; |
1326 | |
1327 | linetab_offset = offset; |
1328 | linetab_count = count; |
1329 | return 0; |
1330 | } |
1331 | |
1332 | static void |
1333 | enter_linenos (file_offset, first_line, last_line) |
1334 | long file_offset; |
1335 | register int first_line; |
1336 | register int last_line; |
1337 | { |
1338 | register char *rawptr = &linetab[file_offset - linetab_offset]; |
4187119d |
1339 | struct lineno lptr; |
bb7592f0 |
1340 | |
1341 | /* skip first line entry for each function */ |
1342 | rawptr += LINESZ; |
1343 | /* line numbers start at one for the first line of the function */ |
1344 | first_line--; |
1345 | |
4187119d |
1346 | /* Bcopy since occaisionally rawptr isn't pointing at long |
1347 | boundaries. */ |
1348 | for (bcopy (rawptr, &lptr, LINESZ); |
1349 | lptr.l_lnno && lptr.l_lnno <= last_line; |
1350 | rawptr += LINESZ, bcopy (rawptr, &lptr, LINESZ)) |
bb7592f0 |
1351 | { |
4187119d |
1352 | record_line (first_line + lptr.l_lnno, lptr.l_addr.l_paddr); |
bb7592f0 |
1353 | } |
1354 | } |
1355 | \f |
1356 | static int |
1357 | hashname (name) |
1358 | char *name; |
1359 | { |
1360 | register char *p = name; |
1361 | register int total = p[0]; |
1362 | register int c; |
1363 | |
1364 | c = p[1]; |
1365 | total += c << 2; |
1366 | if (c) |
1367 | { |
1368 | c = p[2]; |
1369 | total += c << 4; |
1370 | if (c) |
1371 | total += p[3] << 6; |
1372 | } |
1373 | |
1374 | return total % HASHSIZE; |
1375 | } |
1376 | |
1377 | static void |
1378 | patch_type (type, real_type) |
1379 | struct type *type; |
1380 | struct type *real_type; |
1381 | { |
1382 | register struct type *target = TYPE_TARGET_TYPE (type); |
1383 | register struct type *real_target = TYPE_TARGET_TYPE (real_type); |
1384 | int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); |
1385 | |
1386 | TYPE_LENGTH (target) = TYPE_LENGTH (real_target); |
1387 | TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); |
1388 | TYPE_FIELDS (target) = (struct field *) |
1389 | obstack_alloc (symbol_obstack, field_size); |
1390 | |
1391 | bcopy (TYPE_FIELDS (real_target), TYPE_FIELDS (target), field_size); |
1392 | |
1393 | if (TYPE_NAME (real_target)) |
1394 | { |
1395 | if (TYPE_NAME (target)) |
1396 | free (TYPE_NAME (target)); |
1397 | TYPE_NAME (target) = concat (TYPE_NAME (real_target), "", ""); |
1398 | } |
1399 | } |
1400 | |
1401 | /* Patch up all appropriate typdef symbols in the opaque_type_chains |
1402 | so that they can be used to print out opaque data structures properly */ |
1403 | |
1404 | static void |
1405 | patch_opaque_types () |
1406 | { |
1407 | struct symtab *s; |
1408 | |
1409 | /* Look at each symbol in the per-file block of each symtab. */ |
1410 | for (s = symtab_list; s; s = s->next) |
1411 | { |
1412 | register struct block *b; |
1413 | register int i; |
1414 | |
1415 | /* Go through the per-file symbols only */ |
1416 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), 1); |
1417 | for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--) |
1418 | { |
1419 | register struct symbol *real_sym; |
1420 | |
1421 | /* Find completed typedefs to use to fix opaque ones. |
1422 | Remove syms from the chain when their types are stored, |
1423 | but search the whole chain, as there may be several syms |
1424 | from different files with the same name. */ |
1425 | real_sym = BLOCK_SYM (b, i); |
1426 | if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF && |
1427 | SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE && |
1428 | TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR && |
1429 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) |
1430 | { |
1431 | register char *name = SYMBOL_NAME (real_sym); |
1432 | register int hash = hashname (name); |
1433 | register struct symbol *sym, *prev; |
1434 | |
1435 | prev = 0; |
1436 | for (sym = opaque_type_chain[hash]; sym;) |
1437 | { |
1438 | if (name[0] == SYMBOL_NAME (sym)[0] && |
1439 | !strcmp (name + 1, SYMBOL_NAME (sym) + 1)) |
1440 | { |
1441 | if (prev) |
1442 | SYMBOL_VALUE (prev) = SYMBOL_VALUE (sym); |
1443 | else |
1444 | opaque_type_chain[hash] |
1445 | = (struct symbol *) SYMBOL_VALUE (sym); |
1446 | |
1447 | patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); |
1448 | |
1449 | if (prev) |
1450 | sym = (struct symbol *) SYMBOL_VALUE (prev); |
1451 | else |
1452 | sym = opaque_type_chain[hash]; |
1453 | } |
1454 | else |
1455 | { |
1456 | prev = sym; |
1457 | sym = (struct symbol *) SYMBOL_VALUE (sym); |
1458 | } |
1459 | } |
1460 | } |
1461 | } |
1462 | } |
1463 | } |
1464 | \f |
1465 | static struct symbol * |
1466 | process_coff_symbol (cs, aux) |
1467 | register struct coff_symbol *cs; |
1468 | register AUXENT *aux; |
1469 | { |
1470 | register struct symbol *sym |
1471 | = (struct symbol *) obstack_alloc (symbol_obstack, sizeof (struct symbol)); |
1472 | char *name; |
1473 | char *dot; |
1474 | #ifdef NAMES_HAVE_UNDERSCORE |
1475 | int offset = 1; |
1476 | #else |
1477 | int offset = 0; |
1478 | #endif |
1479 | |
1480 | bzero (sym, sizeof (struct symbol)); |
1481 | name = cs->c_name; |
1482 | name = (name[0] == '_' ? name + offset : name); |
1483 | SYMBOL_NAME (sym) = obstack_copy0 (symbol_obstack, name, strlen (name)); |
1484 | |
1485 | /* default assumptions */ |
1486 | SYMBOL_VALUE (sym) = cs->c_value; |
1487 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
1488 | |
1489 | if (ISFCN (cs->c_type)) |
1490 | { |
e91b87a3 |
1491 | SYMBOL_TYPE (sym) = |
1492 | lookup_function_type (decode_function_type (cs, cs->c_type, aux)); |
bb7592f0 |
1493 | SYMBOL_CLASS (sym) = LOC_BLOCK; |
1494 | if (cs->c_sclass == C_STAT) |
1495 | add_symbol_to_list (sym, &file_symbols); |
1496 | else if (cs->c_sclass == C_EXT) |
1497 | add_symbol_to_list (sym, &global_symbols); |
1498 | } |
1499 | else |
1500 | { |
1501 | SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux); |
1502 | switch (cs->c_sclass) |
1503 | { |
1504 | case C_NULL: |
1505 | break; |
1506 | |
1507 | case C_AUTO: |
1508 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
1509 | add_symbol_to_list (sym, &local_symbols); |
1510 | break; |
1511 | |
1512 | case C_EXT: |
1513 | SYMBOL_CLASS (sym) = LOC_STATIC; |
1514 | add_symbol_to_list (sym, &global_symbols); |
1515 | break; |
1516 | |
1517 | case C_STAT: |
1518 | SYMBOL_CLASS (sym) = LOC_STATIC; |
1519 | if (within_function) { |
1520 | /* Static symbol of local scope */ |
1521 | add_symbol_to_list (sym, &local_symbols); |
1522 | } |
1523 | else { |
1524 | /* Static symbol at top level of file */ |
1525 | add_symbol_to_list (sym, &file_symbols); |
1526 | } |
1527 | break; |
1528 | |
1529 | case C_REG: |
bb7592f0 |
1530 | SYMBOL_CLASS (sym) = LOC_REGISTER; |
1531 | add_symbol_to_list (sym, &local_symbols); |
1532 | break; |
1533 | |
1534 | case C_LABEL: |
1535 | break; |
1536 | |
1537 | case C_ARG: |
1538 | SYMBOL_CLASS (sym) = LOC_ARG; |
1539 | add_symbol_to_list (sym, &local_symbols); |
4187119d |
1540 | #ifndef clipper |
bb7592f0 |
1541 | /* If PCC says a parameter is a short or a char, |
1542 | it is really an int. */ |
1543 | if (SYMBOL_TYPE (sym) == builtin_type_char |
1544 | || SYMBOL_TYPE (sym) == builtin_type_short) |
1545 | SYMBOL_TYPE (sym) = builtin_type_int; |
1546 | else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char |
1547 | || SYMBOL_TYPE (sym) == builtin_type_unsigned_short) |
1548 | SYMBOL_TYPE (sym) = builtin_type_unsigned_int; |
4187119d |
1549 | #endif |
bb7592f0 |
1550 | break; |
1551 | |
4187119d |
1552 | case C_REGPARM: |
1553 | SYMBOL_CLASS (sym) = LOC_REGPARM; |
1554 | add_symbol_to_list (sym, &local_symbols); |
1555 | #ifndef clipper |
1556 | /* If PCC says a parameter is a short or a char, |
1557 | it is really an int. */ |
1558 | if (SYMBOL_TYPE (sym) == builtin_type_char |
1559 | || SYMBOL_TYPE (sym) == builtin_type_short) |
1560 | SYMBOL_TYPE (sym) = builtin_type_int; |
1561 | else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char |
1562 | || SYMBOL_TYPE (sym) == builtin_type_unsigned_short) |
1563 | SYMBOL_TYPE (sym) = builtin_type_unsigned_int; |
1564 | #endif |
1565 | break; |
1566 | |
bb7592f0 |
1567 | case C_TPDEF: |
1568 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
1569 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
1570 | |
1571 | /* If type has no name, give it one */ |
1572 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0 |
1573 | && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0) |
1574 | TYPE_NAME (SYMBOL_TYPE (sym)) |
1575 | = concat (SYMBOL_NAME (sym), "", ""); |
1576 | |
1577 | /* Keep track of any type which points to empty structured type, |
1578 | so it can be filled from a definition from another file */ |
1579 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && |
1580 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0) |
1581 | { |
1582 | register int i = hashname (SYMBOL_NAME (sym)); |
1583 | |
1584 | SYMBOL_VALUE (sym) = (int) opaque_type_chain[i]; |
1585 | opaque_type_chain[i] = sym; |
1586 | } |
1587 | add_symbol_to_list (sym, &file_symbols); |
1588 | break; |
1589 | |
1590 | case C_STRTAG: |
1591 | case C_UNTAG: |
1592 | case C_ENTAG: |
1593 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
1594 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; |
1595 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0 |
1596 | && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0) |
1597 | TYPE_NAME (SYMBOL_TYPE (sym)) |
1598 | = concat ("", |
1599 | (cs->c_sclass == C_ENTAG |
1600 | ? "enum " |
1601 | : (cs->c_sclass == C_STRTAG |
1602 | ? "struct " : "union ")), |
1603 | SYMBOL_NAME (sym)); |
1604 | add_symbol_to_list (sym, &file_symbols); |
1605 | break; |
1606 | |
1607 | default: |
1608 | break; |
1609 | } |
1610 | } |
1611 | return sym; |
1612 | } |
1613 | \f |
1614 | /* Decode a coff type specifier; |
1615 | return the type that is meant. */ |
1616 | |
1617 | static |
1618 | struct type * |
1619 | decode_type (cs, c_type, aux) |
1620 | register struct coff_symbol *cs; |
1621 | unsigned int c_type; |
1622 | register AUXENT *aux; |
1623 | { |
1624 | register struct type *type = 0; |
1625 | register int n; |
1626 | unsigned int new_c_type; |
1627 | |
1628 | if (c_type & ~N_BTMASK) |
1629 | { |
1630 | new_c_type = DECREF (c_type); |
1631 | if (ISPTR (c_type)) |
1632 | { |
1633 | type = decode_type (cs, new_c_type, aux); |
1634 | type = lookup_pointer_type (type); |
1635 | } |
1636 | else if (ISFCN (c_type)) |
1637 | { |
1638 | type = decode_type (cs, new_c_type, aux); |
1639 | type = lookup_function_type (type); |
1640 | } |
1641 | else if (ISARY (c_type)) |
1642 | { |
1643 | int i, n; |
1644 | register unsigned short *dim; |
1645 | struct type *base_type; |
1646 | |
1647 | /* Define an array type. */ |
1648 | /* auxent refers to array, not base type */ |
1649 | if (aux->x_sym.x_tagndx == 0) |
1650 | cs->c_nsyms = 1; |
1651 | |
1652 | /* shift the indices down */ |
1653 | dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; |
1654 | i = 1; |
1655 | n = dim[0]; |
1656 | for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) |
1657 | *dim = *(dim + 1); |
1658 | *dim = 0; |
1659 | |
1660 | type = (struct type *) |
1661 | obstack_alloc (symbol_obstack, sizeof (struct type)); |
1662 | bzero (type, sizeof (struct type)); |
1663 | |
1664 | base_type = decode_type (cs, new_c_type, aux); |
1665 | |
1666 | TYPE_CODE (type) = TYPE_CODE_ARRAY; |
1667 | TYPE_TARGET_TYPE (type) = base_type; |
1668 | TYPE_LENGTH (type) = n * TYPE_LENGTH (base_type); |
1669 | } |
1670 | return type; |
1671 | } |
1672 | |
1673 | /* Reference to existing type */ |
1674 | if (cs->c_nsyms > 1 && aux->x_sym.x_tagndx != 0) |
1675 | { |
1676 | type = coff_alloc_type (aux->x_sym.x_tagndx); |
1677 | return type; |
1678 | } |
1679 | |
1680 | return decode_base_type (cs, BTYPE (c_type), aux); |
1681 | } |
1682 | |
1683 | /* Decode a coff type specifier for function definition; |
1684 | return the type that the function returns. */ |
1685 | |
1686 | static |
1687 | struct type * |
1688 | decode_function_type (cs, c_type, aux) |
1689 | register struct coff_symbol *cs; |
1690 | unsigned int c_type; |
1691 | register AUXENT *aux; |
1692 | { |
1693 | if (aux->x_sym.x_tagndx == 0) |
1694 | cs->c_nsyms = 1; /* auxent refers to function, not base type */ |
1695 | |
1696 | return decode_type (cs, DECREF (cs->c_type), aux); |
1697 | } |
1698 | \f |
1699 | /* basic C types */ |
1700 | |
1701 | static |
1702 | struct type * |
1703 | decode_base_type (cs, c_type, aux) |
1704 | register struct coff_symbol *cs; |
1705 | unsigned int c_type; |
1706 | register AUXENT *aux; |
1707 | { |
1708 | struct type *type; |
1709 | |
1710 | switch (c_type) |
1711 | { |
1712 | case T_NULL: |
e91b87a3 |
1713 | /* shows up with "void (*foo)();" structure members */ |
1714 | return builtin_type_void; |
bb7592f0 |
1715 | |
1716 | case T_ARG: |
1717 | /* shouldn't show up here */ |
1718 | break; |
1719 | |
1720 | case T_CHAR: |
1721 | return builtin_type_char; |
1722 | |
1723 | case T_SHORT: |
1724 | return builtin_type_short; |
1725 | |
1726 | case T_INT: |
1727 | return builtin_type_int; |
1728 | |
1729 | case T_LONG: |
1730 | return builtin_type_long; |
1731 | |
1732 | case T_FLOAT: |
1733 | return builtin_type_float; |
1734 | |
1735 | case T_DOUBLE: |
1736 | return builtin_type_double; |
1737 | |
1738 | case T_STRUCT: |
1739 | if (cs->c_nsyms != 2) |
1740 | { |
1741 | /* anonymous structure type */ |
1742 | type = coff_alloc_type (cs->c_symnum); |
1743 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
1744 | TYPE_NAME (type) = concat ("struct ", "<opaque>", ""); |
1745 | TYPE_LENGTH (type) = 0; |
1746 | TYPE_FIELDS (type) = 0; |
1747 | TYPE_NFIELDS (type) = 0; |
1748 | } |
1749 | else |
1750 | { |
1751 | type = read_struct_type (cs->c_symnum, |
1752 | aux->x_sym.x_misc.x_lnsz.x_size, |
1753 | aux->x_sym.x_fcnary.x_fcn.x_endndx); |
1754 | } |
1755 | return type; |
1756 | |
1757 | case T_UNION: |
1758 | if (cs->c_nsyms != 2) |
1759 | { |
1760 | /* anonymous union type */ |
1761 | type = coff_alloc_type (cs->c_symnum); |
1762 | TYPE_NAME (type) = concat ("union ", "<opaque>", ""); |
1763 | TYPE_LENGTH (type) = 0; |
1764 | TYPE_FIELDS (type) = 0; |
1765 | TYPE_NFIELDS (type) = 0; |
1766 | } |
1767 | else |
1768 | { |
1769 | type = read_struct_type (cs->c_symnum, |
1770 | aux->x_sym.x_misc.x_lnsz.x_size, |
1771 | aux->x_sym.x_fcnary.x_fcn.x_endndx); |
1772 | } |
1773 | TYPE_CODE (type) = TYPE_CODE_UNION; |
1774 | return type; |
1775 | |
1776 | case T_ENUM: |
1777 | return read_enum_type (cs->c_symnum, |
1778 | aux->x_sym.x_misc.x_lnsz.x_size, |
1779 | aux->x_sym.x_fcnary.x_fcn.x_endndx); |
1780 | |
1781 | case T_MOE: |
1782 | /* shouldn't show up here */ |
1783 | break; |
1784 | |
1785 | case T_UCHAR: |
1786 | return builtin_type_unsigned_char; |
1787 | |
1788 | case T_USHORT: |
1789 | return builtin_type_unsigned_short; |
1790 | |
1791 | case T_UINT: |
1792 | return builtin_type_unsigned_int; |
1793 | |
1794 | case T_ULONG: |
1795 | return builtin_type_unsigned_long; |
1796 | } |
1797 | printf ("unexpected type %d at symnum %d\n", c_type, cs->c_symnum); |
1798 | return builtin_type_void; |
1799 | } |
1800 | \f |
1801 | /* This page contains subroutines of read_type. */ |
1802 | |
1803 | /* Read the description of a structure (or union type) |
1804 | and return an object describing the type. */ |
1805 | |
1806 | static struct type * |
1807 | read_struct_type (index, length, lastsym) |
1808 | int index; |
1809 | int length; |
1810 | int lastsym; |
1811 | { |
1812 | struct nextfield |
1813 | { |
1814 | struct nextfield *next; |
1815 | struct field field; |
1816 | }; |
1817 | |
1818 | register struct type *type; |
1819 | register struct nextfield *list = 0; |
1820 | struct nextfield *new; |
1821 | int nfields = 0; |
1822 | register int n; |
1823 | char *name; |
1824 | #ifdef NAMES_HAVE_UNDERSCORE |
1825 | int offset = 1; |
1826 | #else |
1827 | int offset = 0; |
1828 | #endif |
1829 | struct coff_symbol member_sym; |
1830 | register struct coff_symbol *ms = &member_sym; |
1831 | SYMENT sub_sym; |
1832 | AUXENT sub_aux; |
e91b87a3 |
1833 | int done = 0; |
bb7592f0 |
1834 | |
1835 | type = coff_alloc_type (index); |
1836 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
1837 | TYPE_LENGTH (type) = length; |
1838 | |
e91b87a3 |
1839 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) |
bb7592f0 |
1840 | { |
1841 | read_one_sym (ms, &sub_sym, &sub_aux); |
1842 | name = ms->c_name; |
1843 | name = (name[0] == '_' ? name + offset : name); |
1844 | |
1845 | switch (ms->c_sclass) |
1846 | { |
1847 | case C_MOS: |
1848 | case C_MOU: |
1849 | |
1850 | /* Get space to record the next field's data. */ |
1851 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); |
1852 | new->next = list; |
1853 | list = new; |
1854 | |
1855 | /* Save the data. */ |
1856 | list->field.name = savestring (name, strlen (name)); |
1857 | list->field.type = decode_type (ms, ms->c_type, &sub_aux); |
1858 | list->field.bitpos = 8 * ms->c_value; |
1859 | list->field.bitsize = 0; |
1860 | nfields++; |
1861 | break; |
1862 | |
1863 | case C_FIELD: |
1864 | |
1865 | /* Get space to record the next field's data. */ |
1866 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); |
1867 | new->next = list; |
1868 | list = new; |
1869 | |
1870 | /* Save the data. */ |
1871 | list->field.name = savestring (name, strlen (name)); |
1872 | list->field.type = decode_type (ms, ms->c_type, &sub_aux); |
1873 | list->field.bitpos = ms->c_value; |
1874 | list->field.bitsize = sub_aux.x_sym.x_misc.x_lnsz.x_size; |
1875 | nfields++; |
1876 | break; |
1877 | |
1878 | case C_EOS: |
e91b87a3 |
1879 | done = 1; |
bb7592f0 |
1880 | break; |
1881 | } |
1882 | } |
1883 | /* Now create the vector of fields, and record how big it is. */ |
1884 | |
1885 | TYPE_NFIELDS (type) = nfields; |
1886 | TYPE_FIELDS (type) = (struct field *) |
1887 | obstack_alloc (symbol_obstack, sizeof (struct field) * nfields); |
1888 | |
1889 | /* Copy the saved-up fields into the field vector. */ |
1890 | |
1891 | for (n = nfields; list; list = list->next) |
1892 | TYPE_FIELD (type, --n) = list->field; |
1893 | |
1894 | return type; |
1895 | } |
1896 | \f |
1897 | /* Read a definition of an enumeration type, |
1898 | and create and return a suitable type object. |
1899 | Also defines the symbols that represent the values of the type. */ |
1900 | |
1901 | static struct type * |
1902 | read_enum_type (index, length, lastsym) |
1903 | int index; |
1904 | int length; |
1905 | int lastsym; |
1906 | { |
1907 | register struct symbol *sym; |
1908 | register struct type *type; |
1909 | int nsyms = 0; |
1910 | struct pending **symlist; |
1911 | struct coff_symbol member_sym; |
1912 | register struct coff_symbol *ms = &member_sym; |
1913 | SYMENT sub_sym; |
1914 | AUXENT sub_aux; |
1915 | struct pending *osyms, *syms; |
1916 | register int n; |
1917 | char *name; |
1918 | #ifdef NAMES_HAVE_UNDERSCORE |
1919 | int offset = 1; |
1920 | #else |
1921 | int offset = 0; |
1922 | #endif |
1923 | |
1924 | type = coff_alloc_type (index); |
1925 | if (within_function) |
1926 | symlist = &local_symbols; |
1927 | else |
1928 | symlist = &file_symbols; |
1929 | osyms = *symlist; |
1930 | |
1931 | while (symnum < lastsym && symnum < nlist_nsyms_global) |
1932 | { |
1933 | read_one_sym (ms, &sub_sym, &sub_aux); |
1934 | name = ms->c_name; |
1935 | name = (name[0] == '_' ? name + offset : name); |
1936 | |
1937 | switch (ms->c_sclass) |
1938 | { |
1939 | case C_MOE: |
1940 | sym = (struct symbol *) xmalloc (sizeof (struct symbol)); |
1941 | bzero (sym, sizeof (struct symbol)); |
1942 | |
1943 | SYMBOL_NAME (sym) = savestring (name, strlen (name)); |
1944 | SYMBOL_CLASS (sym) = LOC_CONST; |
1945 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
1946 | SYMBOL_VALUE (sym) = ms->c_value; |
1947 | add_symbol_to_list (sym, symlist); |
1948 | nsyms++; |
1949 | break; |
1950 | |
1951 | case C_EOS: |
1952 | break; |
1953 | } |
1954 | } |
1955 | |
1956 | /* Now fill in the fields of the type-structure. */ |
1957 | |
1958 | TYPE_LENGTH (type) = sizeof (int); |
1959 | TYPE_CODE (type) = TYPE_CODE_ENUM; |
1960 | TYPE_NFIELDS (type) = nsyms; |
1961 | TYPE_FIELDS (type) = (struct field *) |
1962 | obstack_alloc (symbol_obstack, sizeof (struct field) * nsyms); |
1963 | |
1964 | /* Find the symbols for the values and put them into the type. |
1965 | The symbols can be found in the symlist that we put them on |
1966 | to cause them to be defined. osyms contains the old value |
1967 | of that symlist; everything up to there was defined by us. */ |
1968 | |
1969 | for (syms = *symlist, n = nsyms; syms != osyms; syms = syms->next) |
1970 | { |
1971 | SYMBOL_TYPE (syms->symbol) = type; |
1972 | TYPE_FIELD_NAME (type, --n) = SYMBOL_NAME (syms->symbol); |
e91b87a3 |
1973 | TYPE_FIELD_VALUE (type, n) = 0; |
1974 | TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (syms->symbol); |
bb7592f0 |
1975 | TYPE_FIELD_BITSIZE (type, n) = 0; |
1976 | } |
1977 | return type; |
1978 | } |
1979 | |
e91b87a3 |
1980 | /* This function is really horrible, but to avoid it, there would need |
1981 | to be more filling in of forward references. THIS SHOULD BE MOVED |
1982 | OUT OF COFFREAD.C AND DBXREAD.C TO SOME PLACE WHERE IT CAN BE SHARED. */ |
1983 | int |
1984 | fill_in_vptr_fieldno (type) |
1985 | struct type *type; |
1986 | { |
1987 | if (TYPE_VPTR_FIELDNO (type) < 0) |
1988 | TYPE_VPTR_FIELDNO (type) = |
1989 | fill_in_vptr_fieldno (TYPE_BASECLASS (type, 1)); |
1990 | return TYPE_VPTR_FIELDNO (type); |
1991 | } |
1992 | |
1993 | /* partial symbol tables are not implemented in coff, therefore |
1994 | block_for_pc() (and others) will never decide to call this. */ |
1995 | |
1996 | extern struct symtab * |
1997 | psymtab_to_symtab () |
1998 | { |
1999 | fatal ("error: Someone called psymtab_to_symtab\n"); |
2000 | } |
2001 | |
2002 | /* These will stay zero all the time */ |
4187119d |
2003 | struct psymbol_allocation_list global_psymbols, static_psymbols; |
e91b87a3 |
2004 | |
2005 | _initialize_coff () |
bb7592f0 |
2006 | { |
2007 | symfile = 0; |
2008 | |
4187119d |
2009 | bzero (&global_psymbols, sizeof (global_psymbols)); |
2010 | bzero (&static_psymbols, sizeof (static_psymbols)); |
e91b87a3 |
2011 | |
bb7592f0 |
2012 | add_com ("symbol-file", class_files, symbol_file_command, |
2013 | "Load symbol table (in coff format) from executable file FILE."); |
2014 | } |
2015 | |
bb7592f0 |
2016 | |
2017 | #endif /* COFF_FORMAT */ |
2018 | |