Commit | Line | Data |
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bd5635a1 RP |
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 | |
5 | Copyright (C) 1987-1991 Free Software Foundation, Inc. | |
6 | ||
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. */ | |
22 | \f | |
23 | #include <stdio.h> | |
24 | #include "defs.h" | |
25 | #include "param.h" | |
26 | #include "symtab.h" | |
27 | #include "breakpoint.h" | |
28 | #include "bfd.h" | |
29 | #include "libcoff.h" /* FIXME secret internal data from BFD */ | |
30 | #include "symfile.h" | |
31 | ||
32 | #include <intel-coff.h> | |
33 | #include <obstack.h> | |
34 | #include <string.h> | |
35 | ||
36 | static void add_symbol_to_list (); | |
37 | static void read_coff_symtab (); | |
38 | static void patch_opaque_types (); | |
39 | static struct type *decode_function_type (); | |
40 | static struct type *decode_type (); | |
41 | static struct type *decode_base_type (); | |
42 | static struct type *read_enum_type (); | |
43 | static struct type *read_struct_type (); | |
44 | static void finish_block (); | |
45 | static struct blockvector *make_blockvector (); | |
46 | static struct symbol *process_coff_symbol (); | |
47 | static int init_stringtab (); | |
48 | static void free_stringtab (); | |
49 | static char *getfilename (); | |
50 | static char *getsymname (); | |
51 | static int init_lineno (); | |
52 | static void enter_linenos (); | |
53 | static void read_one_sym (); | |
54 | ||
55 | extern int fclose (); | |
56 | extern void free_all_symtabs (); | |
57 | extern void free_all_psymtabs (); | |
58 | ||
8714ff35 JK |
59 | /* To be an sdb debug type, type must have at least a basic or primary |
60 | derived type. Using this rather than checking against T_NULL is | |
ab8f22a9 JK |
61 | said to prevent core dumps if we try to operate on Michael Bloom |
62 | dbx-in-coff file. */ | |
8714ff35 JK |
63 | |
64 | #define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK)) | |
65 | ||
bd5635a1 RP |
66 | /* external routines from the BFD library -- undocumented interface used |
67 | by GDB to read symbols. Move to libcoff.h. FIXME-SOMEDAY! */ | |
68 | extern void bfd_coff_swap_sym (/* symfile_bfd, &sym */); | |
69 | extern void bfd_coff_swap_aux (/* symfile_bfd, &aux, type, sclass */); | |
70 | extern void bfd_coff_swap_lineno (/* symfile_bfd, &lineno */); | |
71 | ||
72 | ||
73 | /* Name of source file whose symbol data we are now processing. | |
74 | This comes from a symbol named ".file". */ | |
75 | ||
76 | static char *last_source_file; | |
77 | ||
78 | /* Core address of start and end of text of current source file. | |
79 | This comes from a ".text" symbol where x_nlinno > 0. */ | |
80 | ||
81 | static CORE_ADDR cur_src_start_addr; | |
82 | static CORE_ADDR cur_src_end_addr; | |
83 | ||
84 | /* Core address of the end of the first object file. */ | |
85 | static CORE_ADDR first_object_file_end; | |
86 | ||
87 | /* End of the text segment of the executable file, | |
88 | as found in the symbol _etext. */ | |
89 | ||
90 | static CORE_ADDR end_of_text_addr; | |
91 | ||
92 | /* The addresses of the symbol table stream and number of symbols | |
93 | of the object file we are reading (as copied into core). */ | |
94 | ||
95 | static FILE *nlist_stream_global; | |
96 | static int nlist_nsyms_global; | |
97 | ||
98 | /* The entry point (starting address) of the file, if it is an executable. */ | |
99 | ||
100 | static CORE_ADDR entry_point; | |
101 | ||
102 | /* The index in the symbol table of the last coff symbol that was processed. */ | |
103 | ||
104 | static int symnum; | |
105 | ||
106 | /* Vector of types defined so far, indexed by their coff symnum. */ | |
107 | ||
108 | static struct typevector *type_vector; | |
109 | ||
110 | /* Number of elements allocated for type_vector currently. */ | |
111 | ||
112 | static int type_vector_length; | |
113 | ||
114 | /* Vector of line number information. */ | |
115 | ||
116 | static struct linetable *line_vector; | |
117 | ||
118 | /* Index of next entry to go in line_vector_index. */ | |
119 | ||
120 | static int line_vector_index; | |
121 | ||
122 | /* Last line number recorded in the line vector. */ | |
123 | ||
124 | static int prev_line_number; | |
125 | ||
126 | /* Number of elements allocated for line_vector currently. */ | |
127 | ||
128 | static int line_vector_length; | |
129 | ||
130 | #ifdef TDESC | |
131 | #define SEM | |
132 | int int_sem_val = 's' << 24 | 'e' << 16 | 'm' << 8 | '.'; | |
133 | int temp_sem_val; | |
134 | int last_coffsem = 2; | |
135 | int last_coffsyn = 0; | |
136 | int debug_info = 0; /*used by tdesc */ | |
137 | extern int tdesc_handle; | |
138 | extern int safe_to_init_tdesc_context; | |
139 | #endif | |
140 | ||
141 | /* Chain of typedefs of pointers to empty struct/union types. | |
142 | They are chained thru the SYMBOL_VALUE_CHAIN. */ | |
143 | ||
144 | #define HASHSIZE 127 | |
145 | static struct symbol *opaque_type_chain[HASHSIZE]; | |
146 | ||
147 | /* Record the symbols defined for each context in a list. | |
148 | We don't create a struct block for the context until we | |
149 | know how long to make it. */ | |
150 | ||
151 | struct pending | |
152 | { | |
153 | struct pending *next; | |
154 | struct symbol *symbol; | |
155 | }; | |
156 | ||
157 | /* Here are the three lists that symbols are put on. */ | |
158 | ||
159 | struct pending *file_symbols; /* static at top level, and types */ | |
160 | ||
161 | struct pending *global_symbols; /* global functions and variables */ | |
162 | ||
163 | struct pending *local_symbols; /* everything local to lexical context */ | |
164 | ||
165 | /* List of unclosed lexical contexts | |
166 | (that will become blocks, eventually). */ | |
167 | ||
168 | struct context_stack | |
169 | { | |
170 | struct context_stack *next; | |
171 | struct pending *locals; | |
172 | struct pending_block *old_blocks; | |
173 | struct symbol *name; | |
174 | CORE_ADDR start_addr; | |
175 | int depth; | |
176 | }; | |
177 | ||
178 | struct context_stack *context_stack; | |
179 | ||
180 | /* Nonzero if within a function (so symbols should be local, | |
181 | if nothing says specifically). */ | |
182 | ||
183 | int within_function; | |
184 | ||
185 | /* List of blocks already made (lexical contexts already closed). | |
186 | This is used at the end to make the blockvector. */ | |
187 | ||
188 | struct pending_block | |
189 | { | |
190 | struct pending_block *next; | |
191 | struct block *block; | |
192 | }; | |
193 | ||
194 | struct pending_block *pending_blocks; | |
195 | ||
196 | extern CORE_ADDR startup_file_start; /* From blockframe.c */ | |
197 | extern CORE_ADDR startup_file_end; /* From blockframe.c */ | |
198 | ||
199 | /* Complaints about various problems in the file being read */ | |
200 | ||
201 | struct complaint ef_complaint = | |
202 | {"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0}; | |
203 | ||
204 | \f | |
205 | /* Look up a coff type-number index. Return the address of the slot | |
206 | where the type for that index is stored. | |
207 | The type-number is in INDEX. | |
208 | ||
209 | This can be used for finding the type associated with that index | |
210 | or for associating a new type with the index. */ | |
211 | ||
212 | static struct type ** | |
213 | coff_lookup_type (index) | |
214 | register int index; | |
215 | { | |
216 | if (index >= type_vector_length) | |
217 | { | |
218 | int old_vector_length = type_vector_length; | |
219 | ||
220 | type_vector_length *= 2; | |
221 | if (type_vector_length < index) { | |
222 | type_vector_length = index * 2; | |
223 | } | |
224 | type_vector = (struct typevector *) | |
225 | xrealloc (type_vector, sizeof (struct typevector) | |
226 | + type_vector_length * sizeof (struct type *)); | |
227 | bzero (&type_vector->type[ old_vector_length ], | |
228 | (type_vector_length - old_vector_length) * sizeof(struct type *)); | |
229 | } | |
230 | return &type_vector->type[index]; | |
231 | } | |
232 | ||
233 | /* Make sure there is a type allocated for type number index | |
234 | and return the type object. | |
235 | This can create an empty (zeroed) type object. */ | |
236 | ||
237 | static struct type * | |
238 | coff_alloc_type (index) | |
239 | int index; | |
240 | { | |
241 | register struct type **type_addr = coff_lookup_type (index); | |
242 | register struct type *type = *type_addr; | |
243 | ||
244 | /* If we are referring to a type not known at all yet, | |
245 | allocate an empty type for it. | |
246 | We will fill it in later if we find out how. */ | |
247 | if (type == 0) | |
248 | { | |
249 | type = (struct type *) obstack_alloc (symbol_obstack, | |
250 | sizeof (struct type)); | |
251 | bzero (type, sizeof (struct type)); | |
252 | *type_addr = type; | |
253 | } | |
254 | return type; | |
255 | } | |
256 | \f | |
257 | /* maintain the lists of symbols and blocks */ | |
258 | ||
259 | /* Add a symbol to one of the lists of symbols. */ | |
260 | static void | |
261 | add_symbol_to_list (symbol, listhead) | |
262 | struct symbol *symbol; | |
263 | struct pending **listhead; | |
264 | { | |
265 | register struct pending *link | |
266 | = (struct pending *) xmalloc (sizeof (struct pending)); | |
267 | ||
268 | link->next = *listhead; | |
269 | link->symbol = symbol; | |
270 | *listhead = link; | |
271 | } | |
272 | ||
273 | /* Take one of the lists of symbols and make a block from it. | |
274 | Put the block on the list of pending blocks. */ | |
275 | ||
276 | static void | |
277 | finish_block (symbol, listhead, old_blocks, start, end) | |
278 | struct symbol *symbol; | |
279 | struct pending **listhead; | |
280 | struct pending_block *old_blocks; | |
281 | CORE_ADDR start, end; | |
282 | { | |
283 | register struct pending *next, *next1; | |
284 | register struct block *block; | |
285 | register struct pending_block *pblock; | |
286 | struct pending_block *opblock; | |
287 | register int i; | |
288 | ||
289 | /* Count the length of the list of symbols. */ | |
290 | ||
291 | for (next = *listhead, i = 0; next; next = next->next, i++); | |
292 | ||
293 | block = (struct block *) | |
294 | obstack_alloc (symbol_obstack, sizeof (struct block) + (i - 1) * sizeof (struct symbol *)); | |
295 | ||
296 | /* Copy the symbols into the block. */ | |
297 | ||
298 | BLOCK_NSYMS (block) = i; | |
299 | for (next = *listhead; next; next = next->next) | |
300 | BLOCK_SYM (block, --i) = next->symbol; | |
301 | ||
302 | BLOCK_START (block) = start; | |
303 | BLOCK_END (block) = end; | |
304 | BLOCK_SUPERBLOCK (block) = 0; /* Filled in when containing block is made */ | |
305 | ||
306 | /* Put the block in as the value of the symbol that names it. */ | |
307 | ||
308 | if (symbol) | |
309 | { | |
310 | SYMBOL_BLOCK_VALUE (symbol) = block; | |
311 | BLOCK_FUNCTION (block) = symbol; | |
312 | } | |
313 | else | |
314 | BLOCK_FUNCTION (block) = 0; | |
315 | ||
316 | /* Now free the links of the list, and empty the list. */ | |
317 | ||
318 | for (next = *listhead; next; next = next1) | |
319 | { | |
320 | next1 = next->next; | |
321 | free (next); | |
322 | } | |
323 | *listhead = 0; | |
324 | ||
325 | /* Install this block as the superblock | |
326 | of all blocks made since the start of this scope | |
327 | that don't have superblocks yet. */ | |
328 | ||
329 | opblock = 0; | |
330 | for (pblock = pending_blocks; pblock != old_blocks; pblock = pblock->next) | |
331 | { | |
332 | if (BLOCK_SUPERBLOCK (pblock->block) == 0) | |
333 | BLOCK_SUPERBLOCK (pblock->block) = block; | |
334 | opblock = pblock; | |
335 | } | |
336 | ||
337 | /* Record this block on the list of all blocks in the file. | |
338 | Put it after opblock, or at the beginning if opblock is 0. | |
339 | This puts the block in the list after all its subblocks. */ | |
340 | ||
341 | pblock = (struct pending_block *) xmalloc (sizeof (struct pending_block)); | |
342 | pblock->block = block; | |
343 | if (opblock) | |
344 | { | |
345 | pblock->next = opblock->next; | |
346 | opblock->next = pblock; | |
347 | } | |
348 | else | |
349 | { | |
350 | pblock->next = pending_blocks; | |
351 | pending_blocks = pblock; | |
352 | } | |
353 | } | |
354 | ||
355 | static struct blockvector * | |
356 | make_blockvector () | |
357 | { | |
358 | register struct pending_block *next, *next1; | |
359 | register struct blockvector *blockvector; | |
360 | register int i; | |
361 | ||
362 | /* Count the length of the list of blocks. */ | |
363 | ||
364 | for (next = pending_blocks, i = 0; next; next = next->next, i++); | |
365 | ||
366 | blockvector = (struct blockvector *) | |
367 | obstack_alloc (symbol_obstack, sizeof (struct blockvector) + (i - 1) * sizeof (struct block *)); | |
368 | ||
369 | /* Copy the blocks into the blockvector. | |
370 | This is done in reverse order, which happens to put | |
371 | the blocks into the proper order (ascending starting address). | |
372 | finish_block has hair to insert each block into the list | |
373 | after its subblocks in order to make sure this is true. */ | |
374 | ||
375 | BLOCKVECTOR_NBLOCKS (blockvector) = i; | |
376 | for (next = pending_blocks; next; next = next->next) | |
377 | BLOCKVECTOR_BLOCK (blockvector, --i) = next->block; | |
378 | ||
379 | /* Now free the links of the list, and empty the list. */ | |
380 | ||
381 | for (next = pending_blocks; next; next = next1) | |
382 | { | |
383 | next1 = next->next; | |
384 | free (next); | |
385 | } | |
386 | pending_blocks = 0; | |
387 | ||
388 | return blockvector; | |
389 | } | |
390 | ||
391 | /* Manage the vector of line numbers. */ | |
392 | ||
393 | static | |
394 | record_line (line, pc) | |
395 | int line; | |
396 | CORE_ADDR pc; | |
397 | { | |
398 | struct linetable_entry *e; | |
399 | /* Make sure line vector is big enough. */ | |
400 | ||
401 | if (line_vector_index + 2 >= line_vector_length) | |
402 | { | |
403 | line_vector_length *= 2; | |
404 | line_vector = (struct linetable *) | |
405 | xrealloc (line_vector, sizeof (struct linetable) | |
406 | + (line_vector_length | |
407 | * sizeof (struct linetable_entry))); | |
408 | } | |
409 | ||
410 | e = line_vector->item + line_vector_index++; | |
411 | e->line = line; e->pc = pc; | |
412 | } | |
413 | \f | |
414 | /* Start a new symtab for a new source file. | |
415 | This is called when a COFF ".file" symbol is seen; | |
416 | it indicates the start of data for one original source file. */ | |
417 | ||
418 | static void | |
419 | start_symtab () | |
420 | { | |
421 | file_symbols = 0; | |
422 | global_symbols = 0; | |
423 | context_stack = 0; | |
424 | within_function = 0; | |
425 | last_source_file = 0; | |
426 | #ifdef TDESC | |
427 | last_coffsem = 2; | |
428 | last_coffsyn = 0; | |
429 | #endif | |
430 | ||
431 | /* Initialize the source file information for this file. */ | |
432 | ||
433 | line_vector_index = 0; | |
434 | line_vector_length = 1000; | |
435 | prev_line_number = -2; /* Force first line number to be explicit */ | |
436 | line_vector = (struct linetable *) | |
437 | xmalloc (sizeof (struct linetable) | |
438 | + line_vector_length * sizeof (struct linetable_entry)); | |
439 | } | |
440 | ||
441 | /* Save the vital information from when starting to read a file, | |
442 | for use when closing off the current file. | |
443 | NAME is the file name the symbols came from, START_ADDR is the first | |
444 | text address for the file, and SIZE is the number of bytes of text. */ | |
445 | ||
446 | static void | |
447 | complete_symtab (name, start_addr, size) | |
448 | char *name; | |
449 | CORE_ADDR start_addr; | |
450 | unsigned int size; | |
451 | { | |
452 | last_source_file = savestring (name, strlen (name)); | |
453 | cur_src_start_addr = start_addr; | |
454 | cur_src_end_addr = start_addr + size; | |
455 | ||
456 | if (entry_point < cur_src_end_addr | |
457 | && entry_point >= cur_src_start_addr) | |
458 | { | |
459 | startup_file_start = cur_src_start_addr; | |
460 | startup_file_end = cur_src_end_addr; | |
461 | } | |
462 | } | |
463 | ||
464 | /* Finish the symbol definitions for one main source file, | |
465 | close off all the lexical contexts for that file | |
466 | (creating struct block's for them), then make the | |
467 | struct symtab for that file and put it in the list of all such. */ | |
468 | ||
469 | static void | |
470 | end_symtab () | |
471 | { | |
472 | register struct symtab *symtab; | |
473 | register struct context_stack *cstk; | |
474 | register struct blockvector *blockvector; | |
475 | register struct linetable *lv; | |
476 | ||
477 | /* Finish the lexical context of the last function in the file. */ | |
478 | ||
479 | if (context_stack) | |
480 | { | |
481 | cstk = context_stack; | |
482 | context_stack = 0; | |
483 | /* Make a block for the local symbols within. */ | |
484 | finish_block (cstk->name, &local_symbols, cstk->old_blocks, | |
485 | cstk->start_addr, cur_src_end_addr); | |
486 | free (cstk); | |
487 | } | |
488 | ||
489 | /* Ignore a file that has no functions with real debugging info. */ | |
490 | if (pending_blocks == 0 && file_symbols == 0 && global_symbols == 0) | |
491 | { | |
492 | free (line_vector); | |
493 | line_vector = 0; | |
494 | line_vector_length = -1; | |
495 | last_source_file = 0; | |
496 | return; | |
497 | } | |
498 | ||
a6e2b424 JG |
499 | /* Create the two top-level blocks for this file (STATIC_BLOCK and |
500 | GLOBAL_BLOCK). */ | |
bd5635a1 RP |
501 | finish_block (0, &file_symbols, 0, cur_src_start_addr, cur_src_end_addr); |
502 | finish_block (0, &global_symbols, 0, cur_src_start_addr, cur_src_end_addr); | |
503 | ||
504 | /* Create the blockvector that points to all the file's blocks. */ | |
505 | blockvector = make_blockvector (); | |
506 | ||
507 | /* Now create the symtab object for this source file. */ | |
508 | symtab = (struct symtab *) xmalloc (sizeof (struct symtab)); | |
509 | symtab->free_ptr = 0; | |
510 | ||
511 | /* Fill in its components. */ | |
512 | symtab->blockvector = blockvector; | |
513 | symtab->free_code = free_linetable; | |
514 | symtab->filename = last_source_file; | |
b203fc18 | 515 | symtab->dirname = NULL; |
bd5635a1 RP |
516 | lv = line_vector; |
517 | lv->nitems = line_vector_index; | |
518 | symtab->linetable = (struct linetable *) | |
519 | xrealloc (lv, (sizeof (struct linetable) | |
520 | + lv->nitems * sizeof (struct linetable_entry))); | |
521 | symtab->nlines = 0; | |
522 | symtab->line_charpos = 0; | |
523 | ||
b203fc18 JK |
524 | symtab->language = language_unknown; |
525 | symtab->fullname = NULL; | |
526 | ||
bd5635a1 RP |
527 | #ifdef TDESC |
528 | symtab->coffsem = last_coffsem; | |
529 | symtab->coffsyn = last_coffsyn; | |
530 | #endif | |
531 | ||
a6e2b424 JG |
532 | free_named_symtabs (symtab->filename); |
533 | ||
bd5635a1 RP |
534 | /* Link the new symtab into the list of such. */ |
535 | symtab->next = symtab_list; | |
536 | symtab_list = symtab; | |
537 | ||
538 | /* Reinitialize for beginning of new file. */ | |
539 | line_vector = 0; | |
540 | line_vector_length = -1; | |
541 | last_source_file = 0; | |
542 | } | |
543 | \f | |
544 | static void | |
545 | record_misc_function (name, address) | |
546 | char *name; | |
547 | CORE_ADDR address; | |
548 | { | |
549 | #ifdef TDESC | |
550 | /* We don't want TDESC entry points on the misc_function_vector */ | |
551 | if (name[0] == '@') return; | |
552 | #endif | |
553 | /* mf_text isn't true, but apparently COFF doesn't tell us what it really | |
554 | is, so this guess is more useful than mf_unknown. */ | |
555 | prim_record_misc_function (savestring (name, strlen (name)), | |
556 | address, | |
557 | (int)mf_text); | |
558 | } | |
559 | \f | |
560 | /* coff_symfile_init () | |
561 | is the coff-specific initialization routine for reading symbols. | |
562 | It is passed a struct sym_fns which contains, among other things, | |
563 | the BFD for the file whose symbols are being read, and a slot for | |
564 | a pointer to "private data" which we fill with cookies and other | |
565 | treats for coff_symfile_read (). | |
566 | ||
567 | We will only be called if this is a COFF or COFF-like file. | |
568 | BFD handles figuring out the format of the file, and code in symtab.c | |
569 | uses BFD's determination to vector to us. | |
570 | ||
571 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ | |
572 | ||
573 | struct coff_symfile_info { | |
574 | file_ptr min_lineno_offset; /* Where in file lowest line#s are */ | |
575 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ | |
576 | }; | |
577 | ||
578 | void | |
579 | coff_symfile_init (sf) | |
580 | struct sym_fns *sf; | |
581 | { | |
582 | bfd *abfd = sf->sym_bfd; | |
583 | ||
584 | /* Allocate struct to keep track of the symfile */ | |
585 | /* FIXME memory leak */ | |
586 | sf->sym_private = xmalloc (sizeof (struct coff_symfile_info)); | |
587 | ||
588 | #if defined (TDESC) | |
589 | safe_to_init_tdesc_context = 0; | |
590 | #endif | |
591 | ||
592 | /* Save startup file's range of PC addresses to help blockframe.c | |
593 | decide where the bottom of the stack is. */ | |
594 | if (bfd_get_file_flags (abfd) & EXEC_P) | |
595 | { | |
596 | /* Executable file -- record its entry point so we'll recognize | |
597 | the startup file because it contains the entry point. */ | |
598 | entry_point = bfd_get_start_address (abfd); | |
599 | } | |
600 | else | |
601 | { | |
602 | /* Examination of non-executable.o files. Short-circuit this stuff. */ | |
603 | /* ~0 will not be in any file, we hope. */ | |
604 | entry_point = ~0; | |
605 | /* set the startup file to be an empty range. */ | |
606 | startup_file_start = 0; | |
607 | startup_file_end = 0; | |
608 | } | |
609 | } | |
610 | ||
611 | /* This function is called for every section; it finds the outer limits | |
612 | of the line table (minimum and maximum file offset) so that the | |
613 | mainline code can read the whole thing for efficiency. */ | |
614 | ||
615 | static void | |
616 | find_linenos (abfd, asect, vpinfo) | |
617 | bfd *abfd; | |
618 | sec_ptr asect; | |
619 | void *vpinfo; | |
620 | { | |
621 | struct coff_symfile_info *info; | |
622 | int size, count; | |
623 | file_ptr offset, maxoff; | |
624 | ||
625 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
626 | count = asect->lineno_count; | |
627 | /* End of warning */ | |
628 | ||
629 | if (count == 0) | |
630 | return; | |
b203fc18 JK |
631 | #if !defined (LINESZ) |
632 | /* Just in case, you never know what to expect from those | |
633 | COFF header files. */ | |
634 | #define LINESZ (sizeof (struct lineno)) | |
635 | #endif /* No LINESZ. */ | |
636 | size = count * LINESZ; | |
bd5635a1 RP |
637 | |
638 | info = (struct coff_symfile_info *)vpinfo; | |
639 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
640 | offset = asect->line_filepos; | |
641 | /* End of warning */ | |
642 | ||
643 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) | |
644 | info->min_lineno_offset = offset; | |
645 | ||
646 | maxoff = offset + size; | |
647 | if (maxoff > info->max_lineno_offset) | |
648 | info->max_lineno_offset = maxoff; | |
649 | } | |
650 | ||
651 | ||
652 | /* Read a symbol file, after initialization by coff_symfile_init. */ | |
653 | /* FIXME! Addr and Mainline are not used yet -- this will not work for | |
654 | shared libraries or add_file! */ | |
655 | ||
656 | void | |
657 | coff_symfile_read (sf, addr, mainline) | |
658 | struct sym_fns *sf; | |
659 | CORE_ADDR addr; | |
660 | int mainline; | |
661 | { | |
662 | struct coff_symfile_info *info = (struct coff_symfile_info *)sf->sym_private; | |
663 | bfd *abfd = sf->sym_bfd; | |
664 | char *name = bfd_get_filename (abfd); | |
665 | int desc; | |
666 | register int val; | |
667 | int num_symbols; | |
668 | int symtab_offset; | |
669 | int stringtab_offset; | |
670 | ||
671 | symfile_bfd = abfd; /* Kludge for swap routines */ | |
672 | ||
673 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
674 | desc = fileno ((FILE *)(abfd->iostream)); /* File descriptor */ | |
675 | num_symbols = bfd_get_symcount (abfd); /* How many syms */ | |
676 | symtab_offset = obj_sym_filepos (abfd); /* Symbol table file offset */ | |
677 | stringtab_offset = symtab_offset + num_symbols * SYMESZ; /* String tab */ | |
678 | /* End of warning */ | |
679 | ||
680 | #ifdef TDESC | |
681 | debug_info = text_hdr.s_relptr; | |
682 | if (tdesc_handle) | |
683 | { | |
684 | dc_terminate (tdesc_handle); | |
685 | tdesc_handle = 0; | |
686 | } | |
687 | #endif | |
688 | ||
689 | /* Read the line number table, all at once. */ | |
690 | info->min_lineno_offset = 0; | |
691 | info->max_lineno_offset = 0; | |
692 | bfd_map_over_sections (abfd, find_linenos, info); | |
693 | ||
694 | val = init_lineno (desc, info->min_lineno_offset, | |
695 | info->max_lineno_offset - info->min_lineno_offset); | |
696 | if (val < 0) | |
697 | error ("\"%s\": error reading line numbers\n", name); | |
698 | ||
699 | /* Now read the string table, all at once. */ | |
700 | ||
701 | val = init_stringtab (desc, stringtab_offset); | |
702 | if (val < 0) | |
703 | { | |
704 | free_all_symtabs (); /* FIXME blows whole symtab */ | |
705 | printf ("\"%s\": can't get string table", name); | |
706 | fflush (stdout); | |
707 | return; | |
708 | } | |
709 | make_cleanup (free_stringtab, 0); | |
710 | ||
711 | /* Position to read the symbol table. Do not read it all at once. */ | |
712 | val = lseek (desc, (long)symtab_offset, 0); | |
713 | if (val < 0) | |
714 | perror_with_name (name); | |
715 | ||
716 | init_misc_bunches (); | |
717 | make_cleanup (discard_misc_bunches, 0); | |
718 | ||
719 | /* Now that the executable file is positioned at symbol table, | |
720 | process it and define symbols accordingly. */ | |
721 | ||
722 | read_coff_symtab (desc, num_symbols); | |
723 | ||
724 | patch_opaque_types (); | |
725 | ||
726 | /* Sort symbols alphabetically within each block. */ | |
727 | ||
728 | sort_all_symtab_syms (); | |
729 | ||
730 | /* Go over the misc symbol bunches and install them in vector. */ | |
731 | ||
732 | condense_misc_bunches (0); | |
733 | ||
734 | /* Make a default for file to list. */ | |
735 | ||
736 | select_source_symtab (0); /* FIXME, this might be too slow, see dbxread */ | |
737 | } | |
738 | ||
739 | void | |
740 | coff_symfile_discard () | |
741 | { | |
742 | /* There seems to be nothing to do here. */ | |
743 | } | |
744 | ||
745 | void | |
746 | coff_new_init () | |
747 | { | |
748 | /* There seems to be nothing to do except free_all_symtabs and set | |
749 | symfile to zero, which is done by our caller. */ | |
750 | } | |
751 | \f | |
752 | /* Simplified internal version of coff symbol table information */ | |
753 | ||
754 | struct coff_symbol { | |
755 | char *c_name; | |
756 | int c_symnum; /* symbol number of this entry */ | |
757 | int c_nsyms; /* 1 if syment only, 2 if syment + auxent, etc */ | |
758 | long c_value; | |
759 | int c_sclass; | |
760 | int c_secnum; | |
761 | unsigned int c_type; | |
762 | }; | |
763 | ||
764 | /* Given pointers to a symbol table in coff style exec file, | |
765 | analyze them and create struct symtab's describing the symbols. | |
766 | NSYMS is the number of symbols in the symbol table. | |
767 | We read them one at a time using read_one_sym (). */ | |
768 | ||
769 | static void | |
770 | read_coff_symtab (desc, nsyms) | |
771 | int desc; | |
772 | int nsyms; | |
773 | { | |
774 | int newfd; /* Avoid multiple closes on same desc */ | |
775 | FILE *stream; | |
776 | register struct context_stack *new; | |
777 | struct coff_symbol coff_symbol; | |
778 | register struct coff_symbol *cs = &coff_symbol; | |
779 | static SYMENT main_sym; | |
780 | static AUXENT main_aux; | |
781 | struct coff_symbol fcn_cs_saved; | |
782 | static SYMENT fcn_sym_saved; | |
783 | static AUXENT fcn_aux_saved; | |
784 | ||
785 | /* A .file is open. */ | |
786 | int in_source_file = 0; | |
787 | int num_object_files = 0; | |
788 | int next_file_symnum = -1; | |
789 | ||
790 | /* Name of the current file. */ | |
791 | char *filestring = ""; | |
792 | int depth; | |
793 | int fcn_first_line; | |
794 | int fcn_last_line; | |
795 | int fcn_start_addr; | |
796 | long fcn_line_ptr; | |
797 | struct cleanup *old_chain; | |
798 | ||
799 | ||
800 | newfd = dup (desc); | |
801 | if (newfd == -1) | |
802 | fatal ("Too many open files"); | |
803 | stream = fdopen (newfd, "r"); | |
804 | ||
805 | old_chain = make_cleanup (free_all_symtabs, 0); | |
806 | make_cleanup (fclose, stream); | |
807 | nlist_stream_global = stream; | |
808 | nlist_nsyms_global = nsyms; | |
809 | last_source_file = 0; | |
810 | bzero (opaque_type_chain, sizeof opaque_type_chain); | |
811 | ||
812 | type_vector_length = 160; | |
813 | type_vector = (struct typevector *) | |
814 | xmalloc (sizeof (struct typevector) | |
815 | + type_vector_length * sizeof (struct type *)); | |
816 | bzero (type_vector->type, type_vector_length * sizeof (struct type *)); | |
817 | ||
818 | start_symtab (); | |
819 | ||
820 | symnum = 0; | |
821 | while (symnum < nsyms) | |
822 | { | |
823 | QUIT; /* Make this command interruptable. */ | |
824 | read_one_sym (cs, &main_sym, &main_aux); | |
825 | ||
826 | #ifdef SEM | |
827 | temp_sem_val = cs->c_name[0] << 24 | cs->c_name[1] << 16 | | |
828 | cs->c_name[2] << 8 | cs->c_name[3]; | |
829 | if (int_sem_val == temp_sem_val) | |
830 | last_coffsem = (int) strtol (cs->c_name+4, (char **) NULL, 10); | |
831 | #endif | |
832 | ||
833 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) | |
834 | { | |
835 | if (last_source_file) | |
836 | end_symtab (); | |
837 | ||
838 | start_symtab (); | |
839 | complete_symtab ("_globals_", 0, first_object_file_end); | |
840 | /* done with all files, everything from here on out is globals */ | |
841 | } | |
842 | ||
843 | /* Special case for file with type declarations only, no text. */ | |
8714ff35 JK |
844 | if (!last_source_file && SDB_TYPE (cs->c_type) |
845 | && cs->c_secnum == N_DEBUG) | |
bd5635a1 RP |
846 | complete_symtab (filestring, 0, 0); |
847 | ||
848 | /* Typedefs should not be treated as symbol definitions. */ | |
849 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) | |
850 | { | |
851 | /* record as misc function. if we get '.bf' next, | |
852 | * then we undo this step | |
853 | */ | |
854 | record_misc_function (cs->c_name, cs->c_value); | |
855 | ||
856 | fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; | |
857 | fcn_start_addr = cs->c_value; | |
858 | fcn_cs_saved = *cs; | |
859 | fcn_sym_saved = main_sym; | |
860 | fcn_aux_saved = main_aux; | |
861 | continue; | |
862 | } | |
863 | ||
864 | switch (cs->c_sclass) | |
865 | { | |
866 | case C_EFCN: | |
867 | case C_EXTDEF: | |
868 | case C_ULABEL: | |
869 | case C_USTATIC: | |
870 | case C_LINE: | |
871 | case C_ALIAS: | |
872 | case C_HIDDEN: | |
873 | printf ("Bad n_sclass = %d\n", cs->c_sclass); | |
874 | break; | |
875 | ||
876 | case C_FILE: | |
877 | /* | |
878 | * c_value field contains symnum of next .file entry in table | |
879 | * or symnum of first global after last .file. | |
880 | */ | |
881 | next_file_symnum = cs->c_value; | |
882 | filestring = getfilename (&main_aux); | |
883 | /* | |
884 | * Complete symbol table for last object file | |
885 | * containing debugging information. | |
886 | */ | |
887 | if (last_source_file) | |
888 | { | |
889 | end_symtab (); | |
890 | start_symtab (); | |
891 | } | |
892 | in_source_file = 1; | |
893 | break; | |
894 | ||
895 | case C_STAT: | |
896 | if (cs->c_name[0] == '.') { | |
897 | if (strcmp (cs->c_name, _TEXT) == 0) { | |
898 | if (++num_object_files == 1) { | |
899 | /* last address of startup file */ | |
900 | first_object_file_end = cs->c_value + | |
901 | main_aux.x_scn.x_scnlen; | |
902 | } | |
903 | /* Check for in_source_file deals with case of | |
904 | a file with debugging symbols | |
905 | followed by a later file with no symbols. */ | |
906 | if (in_source_file) | |
907 | complete_symtab (filestring, cs->c_value, | |
908 | main_aux.x_scn.x_scnlen); | |
909 | in_source_file = 0; | |
910 | } | |
911 | /* flush rest of '.' symbols */ | |
912 | break; | |
913 | } | |
8714ff35 | 914 | else if (!SDB_TYPE (cs->c_type) |
bd5635a1 RP |
915 | && cs->c_name[0] == 'L' |
916 | && (strncmp (cs->c_name, "LI%", 3) == 0 | |
8714ff35 | 917 | || strncmp (cs->c_name, "LF%", 3) == 0 |
bd5635a1 RP |
918 | || strncmp (cs->c_name,"LC%",3) == 0 |
919 | || strncmp (cs->c_name,"LP%",3) == 0 | |
920 | || strncmp (cs->c_name,"LPB%",4) == 0 | |
921 | || strncmp (cs->c_name,"LBB%",4) == 0 | |
922 | || strncmp (cs->c_name,"LBE%",4) == 0 | |
923 | || strncmp (cs->c_name,"LPBX%",5) == 0)) | |
924 | /* At least on a 3b1, gcc generates swbeg and string labels | |
925 | that look like this. Ignore them. */ | |
926 | break; | |
927 | /* fall in for static symbols that don't start with '.' */ | |
928 | case C_EXT: | |
929 | if (cs->c_sclass == C_EXT && | |
930 | cs->c_secnum == N_ABS && | |
931 | strcmp (cs->c_name, _ETEXT) == 0) | |
932 | end_of_text_addr = cs->c_value; | |
8714ff35 | 933 | if (!SDB_TYPE (cs->c_type)) { |
bd5635a1 RP |
934 | if (cs->c_secnum <= 1) { /* text or abs */ |
935 | record_misc_function (cs->c_name, cs->c_value); | |
936 | break; | |
937 | } else { | |
938 | cs->c_type = T_INT; | |
939 | } | |
940 | } | |
941 | (void) process_coff_symbol (cs, &main_aux); | |
942 | break; | |
943 | ||
944 | case C_FCN: | |
945 | if (strcmp (cs->c_name, ".bf") == 0) | |
946 | { | |
947 | within_function = 1; | |
948 | ||
949 | /* value contains address of first non-init type code */ | |
950 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
951 | contains line number of '{' } */ | |
952 | fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
953 | ||
954 | new = (struct context_stack *) | |
955 | xmalloc (sizeof (struct context_stack)); | |
956 | new->depth = depth = 0; | |
957 | new->next = 0; | |
958 | context_stack = new; | |
959 | new->locals = 0; | |
960 | new->old_blocks = pending_blocks; | |
961 | new->start_addr = fcn_start_addr; | |
962 | fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); | |
963 | new->name = process_coff_symbol (&fcn_cs_saved, | |
964 | &fcn_aux_saved); | |
965 | } | |
966 | else if (strcmp (cs->c_name, ".ef") == 0) | |
967 | { | |
968 | /* the value of .ef is the address of epilogue code; | |
969 | * not useful for gdb | |
970 | */ | |
971 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
972 | contains number of lines to '}' */ | |
973 | new = context_stack; | |
974 | if (new == 0) | |
975 | { | |
976 | complain (&ef_complaint, cs->c_symnum); | |
977 | within_function = 0; | |
978 | break; | |
979 | } | |
980 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
981 | enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line); | |
982 | ||
983 | finish_block (new->name, &local_symbols, new->old_blocks, | |
984 | new->start_addr, | |
985 | #if defined (FUNCTION_EPILOGUE_SIZE) | |
986 | /* This macro should be defined only on | |
987 | machines where the | |
988 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
989 | field is always zero. | |
990 | So use the .bf record information that | |
991 | points to the epilogue and add the size | |
992 | of the epilogue. */ | |
993 | cs->c_value + FUNCTION_EPILOGUE_SIZE | |
994 | #else | |
995 | fcn_cs_saved.c_value + | |
996 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
997 | #endif | |
998 | ); | |
999 | context_stack = 0; | |
1000 | within_function = 0; | |
1001 | free (new); | |
1002 | } | |
1003 | break; | |
1004 | ||
1005 | case C_BLOCK: | |
1006 | if (strcmp (cs->c_name, ".bb") == 0) | |
1007 | { | |
1008 | new = (struct context_stack *) | |
1009 | xmalloc (sizeof (struct context_stack)); | |
1010 | depth++; | |
1011 | new->depth = depth; | |
1012 | new->next = context_stack; | |
1013 | context_stack = new; | |
1014 | new->locals = local_symbols; | |
1015 | new->old_blocks = pending_blocks; | |
1016 | new->start_addr = cs->c_value; | |
1017 | new->name = 0; | |
1018 | local_symbols = 0; | |
1019 | } | |
1020 | else if (strcmp (cs->c_name, ".eb") == 0) | |
1021 | { | |
1022 | new = context_stack; | |
1023 | if (new == 0 || depth != new->depth) | |
1024 | error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.", | |
1025 | symnum); | |
1026 | if (local_symbols && context_stack->next) | |
1027 | { | |
1028 | /* Make a block for the local symbols within. */ | |
1029 | finish_block (0, &local_symbols, new->old_blocks, | |
1030 | new->start_addr, cs->c_value); | |
1031 | } | |
1032 | depth--; | |
1033 | local_symbols = new->locals; | |
1034 | context_stack = new->next; | |
1035 | free (new); | |
1036 | } | |
1037 | break; | |
1038 | #ifdef TDESC | |
1039 | case C_VERSION: | |
1040 | if (strcmp (cs->c_name, ".coffsyn") == 0) | |
1041 | last_coffsyn = cs->c_value; | |
1042 | else if ((strcmp (cs->c_name, ".coffsem") == 0) && | |
1043 | (cs->c_value != 0)) | |
1044 | last_coffsem = cs->c_value; | |
1045 | break; | |
1046 | #endif | |
1047 | ||
1048 | default: | |
1049 | #ifdef TDESC | |
1050 | if ((strcmp (cs->c_name, ".coffsem") == 0) && | |
1051 | (cs->c_value != 0)) | |
1052 | last_coffsem = cs->c_value; | |
1053 | else | |
1054 | #endif | |
1055 | (void) process_coff_symbol (cs, &main_aux); | |
1056 | break; | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | if (last_source_file) | |
1061 | end_symtab (); | |
1062 | fclose (stream); | |
1063 | discard_cleanups (old_chain); | |
1064 | } | |
1065 | \f | |
1066 | /* Routines for reading headers and symbols from executable. */ | |
1067 | ||
1068 | #ifdef FIXME | |
1069 | /* Move these XXXMAGIC symbol defns into BFD! */ | |
1070 | ||
1071 | /* Read COFF file header, check magic number, | |
1072 | and return number of symbols. */ | |
1073 | read_file_hdr (chan, file_hdr) | |
1074 | int chan; | |
1075 | FILHDR *file_hdr; | |
1076 | { | |
1077 | lseek (chan, 0L, 0); | |
1078 | if (myread (chan, (char *)file_hdr, FILHSZ) < 0) | |
1079 | return -1; | |
1080 | ||
1081 | switch (file_hdr->f_magic) | |
1082 | { | |
1083 | #ifdef MC68MAGIC | |
1084 | case MC68MAGIC: | |
1085 | #endif | |
1086 | #ifdef NS32GMAGIC | |
1087 | case NS32GMAGIC: | |
1088 | case NS32SMAGIC: | |
1089 | #endif | |
1090 | #ifdef I386MAGIC | |
1091 | case I386MAGIC: | |
1092 | #endif | |
1093 | #ifdef CLIPPERMAGIC | |
1094 | case CLIPPERMAGIC: | |
1095 | #endif | |
1096 | #if defined (MC68KWRMAGIC) \ | |
1097 | && (!defined (MC68MAGIC) || MC68KWRMAGIC != MC68MAGIC) | |
1098 | case MC68KWRMAGIC: | |
1099 | #endif | |
1100 | #ifdef MC68KROMAGIC | |
1101 | case MC68KROMAGIC: | |
1102 | case MC68KPGMAGIC: | |
1103 | #endif | |
1104 | #ifdef MC88DGMAGIC | |
1105 | case MC88DGMAGIC: | |
1106 | #endif | |
1107 | #ifdef MC88MAGIC | |
1108 | case MC88MAGIC: | |
1109 | #endif | |
1110 | #ifdef I960ROMAGIC | |
1111 | case I960ROMAGIC: /* Intel 960 */ | |
1112 | #endif | |
1113 | #ifdef I960RWMAGIC | |
1114 | case I960RWMAGIC: /* Intel 960 */ | |
1115 | #endif | |
1116 | return file_hdr->f_nsyms; | |
1117 | ||
1118 | default: | |
1119 | #ifdef BADMAG | |
1120 | if (BADMAG(file_hdr)) | |
1121 | return -1; | |
1122 | else | |
1123 | return file_hdr->f_nsyms; | |
1124 | #else | |
1125 | return -1; | |
1126 | #endif | |
1127 | } | |
1128 | } | |
1129 | #endif | |
1130 | ||
1131 | ||
1132 | static void | |
1133 | read_one_sym (cs, sym, aux) | |
1134 | register struct coff_symbol *cs; | |
1135 | register SYMENT *sym; | |
1136 | register AUXENT *aux; | |
1137 | { | |
1138 | AUXENT temp_aux; | |
1139 | int i; | |
1140 | ||
1141 | cs->c_symnum = symnum; | |
1142 | fread ((char *)sym, SYMESZ, 1, nlist_stream_global); | |
1143 | bfd_coff_swap_sym (symfile_bfd, sym); | |
1144 | cs->c_nsyms = (sym->n_numaux & 0xff) + 1; | |
1145 | if (cs->c_nsyms >= 2) | |
1146 | { | |
1147 | fread ((char *)aux, AUXESZ, 1, nlist_stream_global); | |
1148 | bfd_coff_swap_aux (symfile_bfd, aux, sym->n_type, sym->n_sclass); | |
1149 | /* If more than one aux entry, read past it (only the first aux | |
1150 | is important). */ | |
1151 | for (i = 2; i < cs->c_nsyms; i++) | |
1152 | fread ((char *)&temp_aux, AUXESZ, 1, nlist_stream_global); | |
1153 | } | |
1154 | cs->c_name = getsymname (sym); | |
1155 | cs->c_value = sym->n_value; | |
1156 | cs->c_sclass = (sym->n_sclass & 0xff); | |
1157 | cs->c_secnum = sym->n_scnum; | |
1158 | cs->c_type = (unsigned) sym->n_type; | |
8714ff35 JK |
1159 | if (!SDB_TYPE (cs->c_type)) |
1160 | cs->c_type = 0; | |
bd5635a1 RP |
1161 | |
1162 | symnum += cs->c_nsyms; | |
1163 | } | |
1164 | \f | |
1165 | /* Support for string table handling */ | |
1166 | ||
1167 | static char *stringtab = NULL; | |
1168 | ||
1169 | static int | |
1170 | init_stringtab (chan, offset) | |
1171 | int chan; | |
1172 | long offset; | |
1173 | { | |
1174 | long length; | |
1175 | int val; | |
1176 | unsigned char lengthbuf[4]; | |
1177 | ||
1178 | if (stringtab) | |
1179 | { | |
1180 | free (stringtab); | |
1181 | stringtab = NULL; | |
1182 | } | |
1183 | ||
1184 | if (lseek (chan, offset, 0) < 0) | |
1185 | return -1; | |
1186 | ||
1187 | val = myread (chan, (char *)lengthbuf, sizeof lengthbuf); | |
1188 | length = bfd_h_getlong (symfile_bfd, lengthbuf); | |
1189 | ||
1190 | /* If no string table is needed, then the file may end immediately | |
1191 | after the symbols. Just return with `stringtab' set to null. */ | |
1192 | if (val != sizeof length || length < sizeof length) | |
1193 | return 0; | |
1194 | ||
1195 | stringtab = (char *) xmalloc (length); | |
1196 | if (stringtab == NULL) | |
1197 | return -1; | |
1198 | ||
1199 | bcopy (&length, stringtab, sizeof length); | |
1200 | if (length == sizeof length) /* Empty table -- just the count */ | |
1201 | return 0; | |
1202 | ||
1203 | val = myread (chan, stringtab + sizeof length, length - sizeof length); | |
1204 | if (val != length - sizeof length || stringtab[length - 1] != '\0') | |
1205 | return -1; | |
1206 | ||
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | static void | |
1211 | free_stringtab () | |
1212 | { | |
1213 | if (stringtab) | |
1214 | free (stringtab); | |
1215 | stringtab = NULL; | |
1216 | } | |
1217 | ||
1218 | static char * | |
1219 | getsymname (symbol_entry) | |
1220 | SYMENT *symbol_entry; | |
1221 | { | |
1222 | static char buffer[SYMNMLEN+1]; | |
1223 | char *result; | |
1224 | ||
1225 | if (symbol_entry->n_zeroes == 0) | |
1226 | { | |
1227 | result = stringtab + symbol_entry->n_offset; | |
1228 | } | |
1229 | else | |
1230 | { | |
1231 | strncpy (buffer, symbol_entry->n_name, SYMNMLEN); | |
1232 | buffer[SYMNMLEN] = '\0'; | |
1233 | result = buffer; | |
1234 | } | |
1235 | return result; | |
1236 | } | |
1237 | ||
1238 | static char * | |
1239 | getfilename (aux_entry) | |
1240 | AUXENT *aux_entry; | |
1241 | { | |
1242 | static char buffer[BUFSIZ]; | |
1243 | register char *temp; | |
1244 | char *result; | |
1245 | extern char *rindex (); | |
1246 | ||
1247 | #ifndef COFF_NO_LONG_FILE_NAMES | |
1248 | if (aux_entry->x_file.x_n.x_zeroes == 0) | |
1249 | strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); | |
1250 | else | |
1251 | #endif /* COFF_NO_LONG_FILE_NAMES */ | |
1252 | { | |
1253 | #if defined (x_name) | |
1254 | /* Data General. */ | |
1255 | strncpy (buffer, aux_entry->x_name, FILNMLEN); | |
1256 | #else | |
1257 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); | |
1258 | #endif | |
1259 | buffer[FILNMLEN] = '\0'; | |
1260 | } | |
1261 | result = buffer; | |
1262 | if ((temp = rindex (result, '/')) != NULL) | |
1263 | result = temp + 1; | |
1264 | return (result); | |
1265 | } | |
1266 | \f | |
1267 | /* Support for line number handling */ | |
1268 | static char *linetab = NULL; | |
1269 | static long linetab_offset; | |
1270 | static unsigned long linetab_size; | |
1271 | ||
1272 | /* Read in all the line numbers for fast lookups later. */ | |
1273 | ||
1274 | static int | |
1275 | init_lineno (chan, offset, size) | |
1276 | int chan; | |
1277 | long offset; | |
1278 | int size; | |
1279 | { | |
1280 | int val; | |
1281 | register char *p, *q; | |
1282 | ||
1283 | if (lseek (chan, offset, 0) < 0) | |
1284 | return -1; | |
1285 | ||
1286 | linetab = (char *) xmalloc (size); | |
1287 | ||
1288 | val = myread (chan, linetab, size); | |
1289 | if (val != size) | |
1290 | return -1; | |
1291 | ||
1292 | /* Swap all entries */ | |
1293 | q = linetab + size; | |
1294 | for (p = linetab; p < q; p += LINESZ) | |
1295 | bfd_coff_swap_lineno (symfile_bfd, (LINENO *)p); | |
1296 | ||
1297 | linetab_offset = offset; | |
1298 | linetab_size = size; | |
1299 | make_cleanup (free, linetab); /* Be sure it gets de-allocated. */ | |
1300 | return 0; | |
1301 | } | |
1302 | ||
1303 | #if !defined (L_LNNO32) | |
1304 | #define L_LNNO32(lp) ((lp)->l_lnno) | |
1305 | #endif | |
1306 | ||
1307 | static void | |
1308 | enter_linenos (file_offset, first_line, last_line) | |
1309 | long file_offset; | |
1310 | register int first_line; | |
1311 | register int last_line; | |
1312 | { | |
1313 | register char *rawptr; | |
1314 | struct lineno lptr; | |
1315 | ||
1316 | if (file_offset < linetab_offset) | |
1317 | { | |
1318 | fprintf (stderr, "\nInvalid symbol file: file_offset < linetab_offset."); | |
1319 | return; | |
1320 | } | |
1321 | ||
1322 | rawptr = &linetab[file_offset - linetab_offset]; | |
1323 | ||
1324 | /* skip first line entry for each function */ | |
1325 | rawptr += LINESZ; | |
1326 | /* line numbers start at one for the first line of the function */ | |
1327 | first_line--; | |
1328 | ||
1329 | /* Bcopy since occaisionally rawptr isn't pointing at long | |
1330 | boundaries. FIXME we need to byteswap here!!! */ | |
1331 | for (bcopy (rawptr, &lptr, LINESZ); | |
1332 | L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line; | |
1333 | rawptr += LINESZ, bcopy (rawptr, &lptr, LINESZ)) | |
1334 | { | |
1335 | record_line (first_line + L_LNNO32 (&lptr), lptr.l_addr.l_paddr); | |
1336 | } | |
1337 | } | |
1338 | \f | |
1339 | static int | |
1340 | hashname (name) | |
1341 | char *name; | |
1342 | { | |
1343 | register char *p = name; | |
1344 | register int total = p[0]; | |
1345 | register int c; | |
1346 | ||
1347 | c = p[1]; | |
1348 | total += c << 2; | |
1349 | if (c) | |
1350 | { | |
1351 | c = p[2]; | |
1352 | total += c << 4; | |
1353 | if (c) | |
1354 | total += p[3] << 6; | |
1355 | } | |
1356 | ||
1357 | return total % HASHSIZE; | |
1358 | } | |
1359 | ||
1360 | static void | |
1361 | patch_type (type, real_type) | |
1362 | struct type *type; | |
1363 | struct type *real_type; | |
1364 | { | |
1365 | register struct type *target = TYPE_TARGET_TYPE (type); | |
1366 | register struct type *real_target = TYPE_TARGET_TYPE (real_type); | |
1367 | int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); | |
1368 | ||
1369 | TYPE_LENGTH (target) = TYPE_LENGTH (real_target); | |
1370 | TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); | |
1371 | TYPE_FIELDS (target) = (struct field *) | |
1372 | obstack_alloc (symbol_obstack, field_size); | |
1373 | ||
1374 | bcopy (TYPE_FIELDS (real_target), TYPE_FIELDS (target), field_size); | |
1375 | ||
1376 | if (TYPE_NAME (real_target)) | |
1377 | { | |
1378 | if (TYPE_NAME (target)) | |
1379 | free (TYPE_NAME (target)); | |
1380 | TYPE_NAME (target) = concat (TYPE_NAME (real_target), "", ""); | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | /* Patch up all appropriate typdef symbols in the opaque_type_chains | |
1385 | so that they can be used to print out opaque data structures properly */ | |
1386 | ||
1387 | static void | |
1388 | patch_opaque_types () | |
1389 | { | |
1390 | struct symtab *s; | |
1391 | ||
1392 | /* Look at each symbol in the per-file block of each symtab. */ | |
1393 | for (s = symtab_list; s; s = s->next) | |
1394 | { | |
1395 | register struct block *b; | |
1396 | register int i; | |
1397 | ||
1398 | /* Go through the per-file symbols only */ | |
a6e2b424 | 1399 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); |
bd5635a1 RP |
1400 | for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--) |
1401 | { | |
1402 | register struct symbol *real_sym; | |
1403 | ||
1404 | /* Find completed typedefs to use to fix opaque ones. | |
1405 | Remove syms from the chain when their types are stored, | |
1406 | but search the whole chain, as there may be several syms | |
1407 | from different files with the same name. */ | |
1408 | real_sym = BLOCK_SYM (b, i); | |
1409 | if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF && | |
1410 | SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE && | |
1411 | TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR && | |
1412 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) | |
1413 | { | |
1414 | register char *name = SYMBOL_NAME (real_sym); | |
1415 | register int hash = hashname (name); | |
1416 | register struct symbol *sym, *prev; | |
1417 | ||
1418 | prev = 0; | |
1419 | for (sym = opaque_type_chain[hash]; sym;) | |
1420 | { | |
1421 | if (name[0] == SYMBOL_NAME (sym)[0] && | |
1422 | !strcmp (name + 1, SYMBOL_NAME (sym) + 1)) | |
1423 | { | |
1424 | if (prev) | |
1425 | SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); | |
1426 | else | |
1427 | opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); | |
1428 | ||
1429 | patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); | |
1430 | ||
1431 | if (prev) | |
1432 | sym = SYMBOL_VALUE_CHAIN (prev); | |
1433 | else | |
1434 | sym = opaque_type_chain[hash]; | |
1435 | } | |
1436 | else | |
1437 | { | |
1438 | prev = sym; | |
1439 | sym = SYMBOL_VALUE_CHAIN (sym); | |
1440 | } | |
1441 | } | |
1442 | } | |
1443 | } | |
1444 | } | |
1445 | } | |
1446 | \f | |
1447 | #if defined (clipper) | |
1448 | #define BELIEVE_PCC_PROMOTION 1 | |
1449 | #endif | |
1450 | ||
1451 | static struct symbol * | |
1452 | process_coff_symbol (cs, aux) | |
1453 | register struct coff_symbol *cs; | |
1454 | register AUXENT *aux; | |
1455 | { | |
1456 | register struct symbol *sym | |
1457 | = (struct symbol *) obstack_alloc (symbol_obstack, sizeof (struct symbol)); | |
1458 | char *name; | |
1459 | #ifdef NAMES_HAVE_UNDERSCORE | |
1460 | int offset = 1; | |
1461 | #else | |
1462 | int offset = 0; | |
1463 | #endif | |
1464 | ||
1465 | bzero (sym, sizeof (struct symbol)); | |
1466 | name = cs->c_name; | |
1467 | name = (name[0] == '_' ? name + offset : name); | |
1468 | SYMBOL_NAME (sym) = obstack_copy0 (symbol_obstack, name, strlen (name)); | |
1469 | ||
1470 | /* default assumptions */ | |
1471 | SYMBOL_VALUE (sym) = cs->c_value; | |
1472 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1473 | ||
1474 | if (ISFCN (cs->c_type)) | |
1475 | { | |
1476 | SYMBOL_TYPE (sym) = | |
1477 | lookup_function_type (decode_function_type (cs, cs->c_type, aux)); | |
1478 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
1479 | if (cs->c_sclass == C_STAT) | |
1480 | add_symbol_to_list (sym, &file_symbols); | |
1481 | else if (cs->c_sclass == C_EXT) | |
1482 | add_symbol_to_list (sym, &global_symbols); | |
1483 | } | |
1484 | else | |
1485 | { | |
1486 | SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux); | |
1487 | switch (cs->c_sclass) | |
1488 | { | |
1489 | case C_NULL: | |
1490 | break; | |
1491 | ||
1492 | case C_AUTO: | |
1493 | SYMBOL_CLASS (sym) = LOC_LOCAL; | |
1494 | add_symbol_to_list (sym, &local_symbols); | |
1495 | break; | |
1496 | ||
1497 | case C_EXT: | |
1498 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1499 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
1500 | add_symbol_to_list (sym, &global_symbols); | |
1501 | break; | |
1502 | ||
1503 | case C_STAT: | |
1504 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1505 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
1506 | if (within_function) { | |
1507 | /* Static symbol of local scope */ | |
1508 | add_symbol_to_list (sym, &local_symbols); | |
1509 | } | |
1510 | else { | |
1511 | /* Static symbol at top level of file */ | |
1512 | add_symbol_to_list (sym, &file_symbols); | |
1513 | } | |
1514 | break; | |
1515 | ||
1516 | case C_REG: | |
1517 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
1518 | add_symbol_to_list (sym, &local_symbols); | |
1519 | break; | |
1520 | ||
1521 | case C_LABEL: | |
1522 | break; | |
1523 | ||
1524 | case C_ARG: | |
1525 | SYMBOL_CLASS (sym) = LOC_ARG; | |
1526 | add_symbol_to_list (sym, &local_symbols); | |
1527 | #if !defined (BELIEVE_PCC_PROMOTION) | |
1528 | /* If PCC says a parameter is a short or a char, | |
1529 | it is really an int. */ | |
1530 | if (SYMBOL_TYPE (sym) == builtin_type_char | |
1531 | || SYMBOL_TYPE (sym) == builtin_type_short) | |
1532 | SYMBOL_TYPE (sym) = builtin_type_int; | |
1533 | else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char | |
1534 | || SYMBOL_TYPE (sym) == builtin_type_unsigned_short) | |
1535 | SYMBOL_TYPE (sym) = builtin_type_unsigned_int; | |
1536 | #endif | |
1537 | break; | |
1538 | ||
1539 | case C_REGPARM: | |
1540 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
1541 | add_symbol_to_list (sym, &local_symbols); | |
1542 | #if !defined (BELIEVE_PCC_PROMOTION) | |
1543 | /* If PCC says a parameter is a short or a char, | |
1544 | it is really an int. */ | |
1545 | if (SYMBOL_TYPE (sym) == builtin_type_char | |
1546 | || SYMBOL_TYPE (sym) == builtin_type_short) | |
1547 | SYMBOL_TYPE (sym) = builtin_type_int; | |
1548 | else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char | |
1549 | || SYMBOL_TYPE (sym) == builtin_type_unsigned_short) | |
1550 | SYMBOL_TYPE (sym) = builtin_type_unsigned_int; | |
1551 | #endif | |
1552 | break; | |
1553 | ||
1554 | case C_TPDEF: | |
1555 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1556 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1557 | ||
1558 | /* If type has no name, give it one */ | |
1559 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0 | |
1560 | && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0) | |
1561 | TYPE_NAME (SYMBOL_TYPE (sym)) | |
1562 | = concat (SYMBOL_NAME (sym), "", ""); | |
1563 | ||
1564 | /* Keep track of any type which points to empty structured type, | |
1565 | so it can be filled from a definition from another file */ | |
1566 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && | |
1567 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0) | |
1568 | { | |
1569 | register int i = hashname (SYMBOL_NAME (sym)); | |
1570 | ||
1571 | SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; | |
1572 | opaque_type_chain[i] = sym; | |
1573 | } | |
1574 | add_symbol_to_list (sym, &file_symbols); | |
1575 | break; | |
1576 | ||
1577 | case C_STRTAG: | |
1578 | case C_UNTAG: | |
1579 | case C_ENTAG: | |
1580 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1581 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
1582 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0 | |
1583 | && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0) | |
1584 | TYPE_NAME (SYMBOL_TYPE (sym)) | |
1585 | = concat ("", | |
1586 | (cs->c_sclass == C_ENTAG | |
1587 | ? "enum " | |
1588 | : (cs->c_sclass == C_STRTAG | |
1589 | ? "struct " : "union ")), | |
1590 | SYMBOL_NAME (sym)); | |
1591 | add_symbol_to_list (sym, &file_symbols); | |
1592 | break; | |
1593 | ||
1594 | default: | |
1595 | break; | |
1596 | } | |
1597 | } | |
1598 | return sym; | |
1599 | } | |
1600 | \f | |
1601 | /* Decode a coff type specifier; | |
1602 | return the type that is meant. */ | |
1603 | ||
1604 | static | |
1605 | struct type * | |
1606 | decode_type (cs, c_type, aux) | |
1607 | register struct coff_symbol *cs; | |
1608 | unsigned int c_type; | |
1609 | register AUXENT *aux; | |
1610 | { | |
1611 | register struct type *type = 0; | |
1612 | unsigned int new_c_type; | |
1613 | ||
1614 | if (c_type & ~N_BTMASK) | |
1615 | { | |
1616 | new_c_type = DECREF (c_type); | |
1617 | if (ISPTR (c_type)) | |
1618 | { | |
1619 | type = decode_type (cs, new_c_type, aux); | |
1620 | type = lookup_pointer_type (type); | |
1621 | } | |
1622 | else if (ISFCN (c_type)) | |
1623 | { | |
1624 | type = decode_type (cs, new_c_type, aux); | |
1625 | type = lookup_function_type (type); | |
1626 | } | |
1627 | else if (ISARY (c_type)) | |
1628 | { | |
1629 | int i, n; | |
1630 | register unsigned short *dim; | |
1631 | struct type *base_type; | |
1632 | ||
1633 | /* Define an array type. */ | |
1634 | /* auxent refers to array, not base type */ | |
1635 | if (aux->x_sym.x_tagndx == 0) | |
1636 | cs->c_nsyms = 1; | |
1637 | ||
1638 | /* shift the indices down */ | |
1639 | dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; | |
1640 | i = 1; | |
1641 | n = dim[0]; | |
1642 | for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) | |
1643 | *dim = *(dim + 1); | |
1644 | *dim = 0; | |
1645 | ||
1646 | type = (struct type *) | |
1647 | obstack_alloc (symbol_obstack, sizeof (struct type)); | |
1648 | bzero (type, sizeof (struct type)); | |
1649 | ||
1650 | base_type = decode_type (cs, new_c_type, aux); | |
1651 | ||
1652 | TYPE_CODE (type) = TYPE_CODE_ARRAY; | |
1653 | TYPE_TARGET_TYPE (type) = base_type; | |
1654 | TYPE_LENGTH (type) = n * TYPE_LENGTH (base_type); | |
1655 | } | |
1656 | return type; | |
1657 | } | |
1658 | ||
1659 | /* Reference to existing type */ | |
1660 | if (cs->c_nsyms > 1 && aux->x_sym.x_tagndx != 0) | |
1661 | { | |
1662 | type = coff_alloc_type (aux->x_sym.x_tagndx); | |
1663 | return type; | |
1664 | } | |
1665 | ||
1666 | return decode_base_type (cs, BTYPE (c_type), aux); | |
1667 | } | |
1668 | ||
1669 | /* Decode a coff type specifier for function definition; | |
1670 | return the type that the function returns. */ | |
1671 | ||
1672 | static | |
1673 | struct type * | |
1674 | decode_function_type (cs, c_type, aux) | |
1675 | register struct coff_symbol *cs; | |
1676 | unsigned int c_type; | |
1677 | register AUXENT *aux; | |
1678 | { | |
1679 | if (aux->x_sym.x_tagndx == 0) | |
1680 | cs->c_nsyms = 1; /* auxent refers to function, not base type */ | |
1681 | ||
1682 | return decode_type (cs, DECREF (c_type), aux); | |
1683 | } | |
1684 | \f | |
1685 | /* basic C types */ | |
1686 | ||
1687 | static | |
1688 | struct type * | |
1689 | decode_base_type (cs, c_type, aux) | |
1690 | register struct coff_symbol *cs; | |
1691 | unsigned int c_type; | |
1692 | register AUXENT *aux; | |
1693 | { | |
1694 | struct type *type; | |
1695 | ||
1696 | switch (c_type) | |
1697 | { | |
1698 | case T_NULL: | |
1699 | /* shows up with "void (*foo)();" structure members */ | |
1700 | return builtin_type_void; | |
1701 | ||
1702 | #ifdef T_ARG | |
1703 | case T_ARG: | |
1704 | /* Shows up in DGUX, I think. Not sure where. */ | |
1705 | return builtin_type_void; /* shouldn't show up here */ | |
1706 | #endif | |
1707 | ||
1708 | #ifdef T_VOID | |
1709 | case T_VOID: | |
1710 | /* Intel 960 COFF has this symbol and meaning. */ | |
1711 | return builtin_type_void; | |
1712 | #endif | |
1713 | ||
1714 | case T_CHAR: | |
1715 | return builtin_type_char; | |
1716 | ||
1717 | case T_SHORT: | |
1718 | return builtin_type_short; | |
1719 | ||
1720 | case T_INT: | |
1721 | return builtin_type_int; | |
1722 | ||
1723 | case T_LONG: | |
1724 | return builtin_type_long; | |
1725 | ||
1726 | case T_FLOAT: | |
1727 | return builtin_type_float; | |
1728 | ||
1729 | case T_DOUBLE: | |
1730 | return builtin_type_double; | |
1731 | ||
1732 | case T_STRUCT: | |
1733 | if (cs->c_nsyms != 2) | |
1734 | { | |
1735 | /* anonymous structure type */ | |
1736 | type = coff_alloc_type (cs->c_symnum); | |
1737 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1738 | TYPE_NAME (type) = concat ("struct ", "<opaque>", ""); | |
1739 | TYPE_LENGTH (type) = 0; | |
1740 | TYPE_FIELDS (type) = 0; | |
1741 | TYPE_NFIELDS (type) = 0; | |
1742 | } | |
1743 | else | |
1744 | { | |
1745 | type = read_struct_type (cs->c_symnum, | |
1746 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1747 | aux->x_sym.x_fcnary.x_fcn.x_endndx); | |
1748 | } | |
1749 | return type; | |
1750 | ||
1751 | case T_UNION: | |
1752 | if (cs->c_nsyms != 2) | |
1753 | { | |
1754 | /* anonymous union type */ | |
1755 | type = coff_alloc_type (cs->c_symnum); | |
1756 | TYPE_NAME (type) = concat ("union ", "<opaque>", ""); | |
1757 | TYPE_LENGTH (type) = 0; | |
1758 | TYPE_FIELDS (type) = 0; | |
1759 | TYPE_NFIELDS (type) = 0; | |
1760 | } | |
1761 | else | |
1762 | { | |
1763 | type = read_struct_type (cs->c_symnum, | |
1764 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1765 | aux->x_sym.x_fcnary.x_fcn.x_endndx); | |
1766 | } | |
1767 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1768 | return type; | |
1769 | ||
1770 | case T_ENUM: | |
1771 | return read_enum_type (cs->c_symnum, | |
1772 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1773 | aux->x_sym.x_fcnary.x_fcn.x_endndx); | |
1774 | ||
1775 | case T_MOE: | |
1776 | /* shouldn't show up here */ | |
1777 | break; | |
1778 | ||
1779 | case T_UCHAR: | |
1780 | return builtin_type_unsigned_char; | |
1781 | ||
1782 | case T_USHORT: | |
1783 | return builtin_type_unsigned_short; | |
1784 | ||
1785 | case T_UINT: | |
1786 | return builtin_type_unsigned_int; | |
1787 | ||
1788 | case T_ULONG: | |
1789 | return builtin_type_unsigned_long; | |
1790 | } | |
1791 | printf ("unexpected type %d at symnum %d\n", c_type, cs->c_symnum); | |
1792 | return builtin_type_void; | |
1793 | } | |
1794 | \f | |
1795 | /* This page contains subroutines of read_type. */ | |
1796 | ||
1797 | /* Read the description of a structure (or union type) | |
1798 | and return an object describing the type. */ | |
1799 | ||
1800 | static struct type * | |
1801 | read_struct_type (index, length, lastsym) | |
1802 | int index; | |
1803 | int length; | |
1804 | int lastsym; | |
1805 | { | |
1806 | struct nextfield | |
1807 | { | |
1808 | struct nextfield *next; | |
1809 | struct field field; | |
1810 | }; | |
1811 | ||
1812 | register struct type *type; | |
1813 | register struct nextfield *list = 0; | |
1814 | struct nextfield *new; | |
1815 | int nfields = 0; | |
1816 | register int n; | |
1817 | char *name; | |
1818 | #ifdef NAMES_HAVE_UNDERSCORE | |
1819 | int offset = 1; | |
1820 | #else | |
1821 | int offset = 0; | |
1822 | #endif | |
1823 | struct coff_symbol member_sym; | |
1824 | register struct coff_symbol *ms = &member_sym; | |
1825 | SYMENT sub_sym; | |
1826 | AUXENT sub_aux; | |
1827 | int done = 0; | |
1828 | ||
1829 | type = coff_alloc_type (index); | |
1830 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1831 | TYPE_LENGTH (type) = length; | |
1832 | ||
1833 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
1834 | { | |
1835 | read_one_sym (ms, &sub_sym, &sub_aux); | |
1836 | name = ms->c_name; | |
1837 | name = (name[0] == '_' ? name + offset : name); | |
1838 | ||
1839 | switch (ms->c_sclass) | |
1840 | { | |
1841 | case C_MOS: | |
1842 | case C_MOU: | |
1843 | ||
1844 | /* Get space to record the next field's data. */ | |
1845 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1846 | new->next = list; | |
1847 | list = new; | |
1848 | ||
1849 | /* Save the data. */ | |
1850 | list->field.name = savestring (name, strlen (name)); | |
1851 | list->field.type = decode_type (ms, ms->c_type, &sub_aux); | |
1852 | list->field.bitpos = 8 * ms->c_value; | |
1853 | list->field.bitsize = 0; | |
1854 | nfields++; | |
1855 | break; | |
1856 | ||
1857 | case C_FIELD: | |
1858 | ||
1859 | /* Get space to record the next field's data. */ | |
1860 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1861 | new->next = list; | |
1862 | list = new; | |
1863 | ||
1864 | /* Save the data. */ | |
1865 | list->field.name = savestring (name, strlen (name)); | |
1866 | list->field.type = decode_type (ms, ms->c_type, &sub_aux); | |
1867 | list->field.bitpos = ms->c_value; | |
1868 | list->field.bitsize = sub_aux.x_sym.x_misc.x_lnsz.x_size; | |
1869 | nfields++; | |
1870 | break; | |
1871 | ||
1872 | case C_EOS: | |
1873 | done = 1; | |
1874 | break; | |
1875 | } | |
1876 | } | |
1877 | /* Now create the vector of fields, and record how big it is. */ | |
1878 | ||
1879 | TYPE_NFIELDS (type) = nfields; | |
1880 | TYPE_FIELDS (type) = (struct field *) | |
1881 | obstack_alloc (symbol_obstack, sizeof (struct field) * nfields); | |
1882 | ||
1883 | /* Copy the saved-up fields into the field vector. */ | |
1884 | ||
1885 | for (n = nfields; list; list = list->next) | |
1886 | TYPE_FIELD (type, --n) = list->field; | |
1887 | ||
1888 | return type; | |
1889 | } | |
1890 | \f | |
1891 | /* Read a definition of an enumeration type, | |
1892 | and create and return a suitable type object. | |
1893 | Also defines the symbols that represent the values of the type. */ | |
1894 | ||
1895 | static struct type * | |
1896 | read_enum_type (index, length, lastsym) | |
1897 | int index; | |
1898 | int length; | |
1899 | int lastsym; | |
1900 | { | |
1901 | register struct symbol *sym; | |
1902 | register struct type *type; | |
1903 | int nsyms = 0; | |
1904 | int done = 0; | |
1905 | struct pending **symlist; | |
1906 | struct coff_symbol member_sym; | |
1907 | register struct coff_symbol *ms = &member_sym; | |
1908 | SYMENT sub_sym; | |
1909 | AUXENT sub_aux; | |
1910 | struct pending *osyms, *syms; | |
1911 | register int n; | |
1912 | char *name; | |
1913 | #ifdef NAMES_HAVE_UNDERSCORE | |
1914 | int offset = 1; | |
1915 | #else | |
1916 | int offset = 0; | |
1917 | #endif | |
1918 | ||
1919 | type = coff_alloc_type (index); | |
1920 | if (within_function) | |
1921 | symlist = &local_symbols; | |
1922 | else | |
1923 | symlist = &file_symbols; | |
1924 | osyms = *symlist; | |
1925 | ||
1926 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
1927 | { | |
1928 | read_one_sym (ms, &sub_sym, &sub_aux); | |
1929 | name = ms->c_name; | |
1930 | name = (name[0] == '_' ? name + offset : name); | |
1931 | ||
1932 | switch (ms->c_sclass) | |
1933 | { | |
1934 | case C_MOE: | |
1935 | sym = (struct symbol *) xmalloc (sizeof (struct symbol)); | |
1936 | bzero (sym, sizeof (struct symbol)); | |
1937 | ||
1938 | SYMBOL_NAME (sym) = savestring (name, strlen (name)); | |
1939 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1940 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1941 | SYMBOL_VALUE (sym) = ms->c_value; | |
1942 | add_symbol_to_list (sym, symlist); | |
1943 | nsyms++; | |
1944 | break; | |
1945 | ||
1946 | case C_EOS: | |
1947 | /* Sometimes the linker (on 386/ix 2.0.2 at least) screws | |
1948 | up the count of how many symbols to read. So stop | |
1949 | on .eos. */ | |
1950 | done = 1; | |
1951 | break; | |
1952 | } | |
1953 | } | |
1954 | ||
1955 | /* Now fill in the fields of the type-structure. */ | |
1956 | ||
1957 | TYPE_LENGTH (type) = sizeof (int); | |
1958 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
1959 | TYPE_NFIELDS (type) = nsyms; | |
1960 | TYPE_FIELDS (type) = (struct field *) | |
1961 | obstack_alloc (symbol_obstack, sizeof (struct field) * nsyms); | |
1962 | ||
1963 | /* Find the symbols for the values and put them into the type. | |
1964 | The symbols can be found in the symlist that we put them on | |
1965 | to cause them to be defined. osyms contains the old value | |
1966 | of that symlist; everything up to there was defined by us. */ | |
1967 | ||
1968 | for (syms = *symlist, n = nsyms; syms != osyms; syms = syms->next) | |
1969 | { | |
1970 | SYMBOL_TYPE (syms->symbol) = type; | |
1971 | TYPE_FIELD_NAME (type, --n) = SYMBOL_NAME (syms->symbol); | |
1972 | TYPE_FIELD_VALUE (type, n) = 0; | |
1973 | TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (syms->symbol); | |
1974 | TYPE_FIELD_BITSIZE (type, n) = 0; | |
1975 | } | |
1976 | return type; | |
1977 | } | |
1978 | ||
1979 | /* Register our ability to parse symbols for coff BFD files */ | |
1980 | ||
1981 | static struct sym_fns coff_sym_fns = | |
1982 | { | |
1983 | "coff", 4, | |
1984 | coff_new_init, coff_symfile_init, | |
1985 | coff_symfile_read, coff_symfile_discard | |
1986 | }; | |
1987 | ||
1988 | void | |
1989 | _initialize_coffread () | |
1990 | { | |
1991 | add_symtab_fns(&coff_sym_fns); | |
1992 | } |