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" | |
bd5635a1 RP |
29 | #include "symfile.h" |
30 | ||
31 | #include <intel-coff.h> | |
32 | #include <obstack.h> | |
33 | #include <string.h> | |
34 | ||
63989338 JG |
35 | #include "libcoff.h" /* FIXME secret internal data from BFD */ |
36 | ||
bd5635a1 RP |
37 | static void add_symbol_to_list (); |
38 | static void read_coff_symtab (); | |
39 | static void patch_opaque_types (); | |
40 | static struct type *decode_function_type (); | |
41 | static struct type *decode_type (); | |
42 | static struct type *decode_base_type (); | |
43 | static struct type *read_enum_type (); | |
44 | static struct type *read_struct_type (); | |
45 | static void finish_block (); | |
46 | static struct blockvector *make_blockvector (); | |
47 | static struct symbol *process_coff_symbol (); | |
48 | static int init_stringtab (); | |
49 | static void free_stringtab (); | |
50 | static char *getfilename (); | |
51 | static char *getsymname (); | |
52 | static int init_lineno (); | |
53 | static void enter_linenos (); | |
54 | static void read_one_sym (); | |
55 | ||
56 | extern int fclose (); | |
57 | extern void free_all_symtabs (); | |
58 | extern void free_all_psymtabs (); | |
59 | ||
8714ff35 JK |
60 | /* To be an sdb debug type, type must have at least a basic or primary |
61 | derived type. Using this rather than checking against T_NULL is | |
ab8f22a9 JK |
62 | said to prevent core dumps if we try to operate on Michael Bloom |
63 | dbx-in-coff file. */ | |
8714ff35 JK |
64 | |
65 | #define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK)) | |
66 | ||
bd5635a1 RP |
67 | /* external routines from the BFD library -- undocumented interface used |
68 | by GDB to read symbols. Move to libcoff.h. FIXME-SOMEDAY! */ | |
69 | extern void bfd_coff_swap_sym (/* symfile_bfd, &sym */); | |
70 | extern void bfd_coff_swap_aux (/* symfile_bfd, &aux, type, sclass */); | |
71 | extern void bfd_coff_swap_lineno (/* symfile_bfd, &lineno */); | |
72 | ||
73 | ||
74 | /* Name of source file whose symbol data we are now processing. | |
75 | This comes from a symbol named ".file". */ | |
76 | ||
77 | static char *last_source_file; | |
78 | ||
79 | /* Core address of start and end of text of current source file. | |
80 | This comes from a ".text" symbol where x_nlinno > 0. */ | |
81 | ||
82 | static CORE_ADDR cur_src_start_addr; | |
83 | static CORE_ADDR cur_src_end_addr; | |
84 | ||
85 | /* Core address of the end of the first object file. */ | |
86 | static CORE_ADDR first_object_file_end; | |
87 | ||
88 | /* End of the text segment of the executable file, | |
89 | as found in the symbol _etext. */ | |
90 | ||
91 | static CORE_ADDR end_of_text_addr; | |
92 | ||
93 | /* The addresses of the symbol table stream and number of symbols | |
94 | of the object file we are reading (as copied into core). */ | |
95 | ||
96 | static FILE *nlist_stream_global; | |
97 | static int nlist_nsyms_global; | |
98 | ||
99 | /* The entry point (starting address) of the file, if it is an executable. */ | |
100 | ||
101 | static CORE_ADDR entry_point; | |
102 | ||
103 | /* The index in the symbol table of the last coff symbol that was processed. */ | |
104 | ||
105 | static int symnum; | |
106 | ||
107 | /* Vector of types defined so far, indexed by their coff symnum. */ | |
108 | ||
109 | static struct typevector *type_vector; | |
110 | ||
111 | /* Number of elements allocated for type_vector currently. */ | |
112 | ||
113 | static int type_vector_length; | |
114 | ||
115 | /* Vector of line number information. */ | |
116 | ||
117 | static struct linetable *line_vector; | |
118 | ||
119 | /* Index of next entry to go in line_vector_index. */ | |
120 | ||
121 | static int line_vector_index; | |
122 | ||
123 | /* Last line number recorded in the line vector. */ | |
124 | ||
125 | static int prev_line_number; | |
126 | ||
127 | /* Number of elements allocated for line_vector currently. */ | |
128 | ||
129 | static int line_vector_length; | |
130 | ||
131 | #ifdef TDESC | |
132 | #define SEM | |
133 | int int_sem_val = 's' << 24 | 'e' << 16 | 'm' << 8 | '.'; | |
134 | int temp_sem_val; | |
135 | int last_coffsem = 2; | |
136 | int last_coffsyn = 0; | |
137 | int debug_info = 0; /*used by tdesc */ | |
138 | extern int tdesc_handle; | |
139 | extern int safe_to_init_tdesc_context; | |
140 | #endif | |
141 | ||
142 | /* Chain of typedefs of pointers to empty struct/union types. | |
143 | They are chained thru the SYMBOL_VALUE_CHAIN. */ | |
144 | ||
145 | #define HASHSIZE 127 | |
146 | static struct symbol *opaque_type_chain[HASHSIZE]; | |
147 | ||
148 | /* Record the symbols defined for each context in a list. | |
149 | We don't create a struct block for the context until we | |
150 | know how long to make it. */ | |
151 | ||
152 | struct pending | |
153 | { | |
154 | struct pending *next; | |
155 | struct symbol *symbol; | |
156 | }; | |
157 | ||
158 | /* Here are the three lists that symbols are put on. */ | |
159 | ||
160 | struct pending *file_symbols; /* static at top level, and types */ | |
161 | ||
162 | struct pending *global_symbols; /* global functions and variables */ | |
163 | ||
164 | struct pending *local_symbols; /* everything local to lexical context */ | |
165 | ||
166 | /* List of unclosed lexical contexts | |
167 | (that will become blocks, eventually). */ | |
168 | ||
169 | struct context_stack | |
170 | { | |
171 | struct context_stack *next; | |
172 | struct pending *locals; | |
173 | struct pending_block *old_blocks; | |
174 | struct symbol *name; | |
175 | CORE_ADDR start_addr; | |
176 | int depth; | |
177 | }; | |
178 | ||
179 | struct context_stack *context_stack; | |
180 | ||
181 | /* Nonzero if within a function (so symbols should be local, | |
182 | if nothing says specifically). */ | |
183 | ||
184 | int within_function; | |
185 | ||
186 | /* List of blocks already made (lexical contexts already closed). | |
187 | This is used at the end to make the blockvector. */ | |
188 | ||
189 | struct pending_block | |
190 | { | |
191 | struct pending_block *next; | |
192 | struct block *block; | |
193 | }; | |
194 | ||
195 | struct pending_block *pending_blocks; | |
196 | ||
197 | extern CORE_ADDR startup_file_start; /* From blockframe.c */ | |
198 | extern CORE_ADDR startup_file_end; /* From blockframe.c */ | |
199 | ||
200 | /* Complaints about various problems in the file being read */ | |
201 | ||
202 | struct complaint ef_complaint = | |
203 | {"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0}; | |
204 | ||
63989338 JG |
205 | struct complaint lineno_complaint = |
206 | {"Line number pointer %d lower than start of line numbers", 0, 0}; | |
207 | ||
bd5635a1 RP |
208 | \f |
209 | /* Look up a coff type-number index. Return the address of the slot | |
210 | where the type for that index is stored. | |
211 | The type-number is in INDEX. | |
212 | ||
213 | This can be used for finding the type associated with that index | |
214 | or for associating a new type with the index. */ | |
215 | ||
216 | static struct type ** | |
217 | coff_lookup_type (index) | |
218 | register int index; | |
219 | { | |
220 | if (index >= type_vector_length) | |
221 | { | |
222 | int old_vector_length = type_vector_length; | |
223 | ||
224 | type_vector_length *= 2; | |
225 | if (type_vector_length < index) { | |
226 | type_vector_length = index * 2; | |
227 | } | |
228 | type_vector = (struct typevector *) | |
229 | xrealloc (type_vector, sizeof (struct typevector) | |
230 | + type_vector_length * sizeof (struct type *)); | |
231 | bzero (&type_vector->type[ old_vector_length ], | |
232 | (type_vector_length - old_vector_length) * sizeof(struct type *)); | |
233 | } | |
234 | return &type_vector->type[index]; | |
235 | } | |
236 | ||
237 | /* Make sure there is a type allocated for type number index | |
238 | and return the type object. | |
239 | This can create an empty (zeroed) type object. */ | |
240 | ||
241 | static struct type * | |
242 | coff_alloc_type (index) | |
243 | int index; | |
244 | { | |
245 | register struct type **type_addr = coff_lookup_type (index); | |
246 | register struct type *type = *type_addr; | |
247 | ||
248 | /* If we are referring to a type not known at all yet, | |
249 | allocate an empty type for it. | |
250 | We will fill it in later if we find out how. */ | |
251 | if (type == 0) | |
252 | { | |
253 | type = (struct type *) obstack_alloc (symbol_obstack, | |
254 | sizeof (struct type)); | |
255 | bzero (type, sizeof (struct type)); | |
256 | *type_addr = type; | |
257 | } | |
258 | return type; | |
259 | } | |
260 | \f | |
261 | /* maintain the lists of symbols and blocks */ | |
262 | ||
263 | /* Add a symbol to one of the lists of symbols. */ | |
264 | static void | |
265 | add_symbol_to_list (symbol, listhead) | |
266 | struct symbol *symbol; | |
267 | struct pending **listhead; | |
268 | { | |
269 | register struct pending *link | |
270 | = (struct pending *) xmalloc (sizeof (struct pending)); | |
271 | ||
272 | link->next = *listhead; | |
273 | link->symbol = symbol; | |
274 | *listhead = link; | |
275 | } | |
276 | ||
277 | /* Take one of the lists of symbols and make a block from it. | |
278 | Put the block on the list of pending blocks. */ | |
279 | ||
280 | static void | |
281 | finish_block (symbol, listhead, old_blocks, start, end) | |
282 | struct symbol *symbol; | |
283 | struct pending **listhead; | |
284 | struct pending_block *old_blocks; | |
285 | CORE_ADDR start, end; | |
286 | { | |
287 | register struct pending *next, *next1; | |
288 | register struct block *block; | |
289 | register struct pending_block *pblock; | |
290 | struct pending_block *opblock; | |
291 | register int i; | |
292 | ||
293 | /* Count the length of the list of symbols. */ | |
294 | ||
295 | for (next = *listhead, i = 0; next; next = next->next, i++); | |
296 | ||
297 | block = (struct block *) | |
298 | obstack_alloc (symbol_obstack, sizeof (struct block) + (i - 1) * sizeof (struct symbol *)); | |
299 | ||
300 | /* Copy the symbols into the block. */ | |
301 | ||
302 | BLOCK_NSYMS (block) = i; | |
303 | for (next = *listhead; next; next = next->next) | |
304 | BLOCK_SYM (block, --i) = next->symbol; | |
305 | ||
306 | BLOCK_START (block) = start; | |
307 | BLOCK_END (block) = end; | |
308 | BLOCK_SUPERBLOCK (block) = 0; /* Filled in when containing block is made */ | |
309 | ||
310 | /* Put the block in as the value of the symbol that names it. */ | |
311 | ||
312 | if (symbol) | |
313 | { | |
314 | SYMBOL_BLOCK_VALUE (symbol) = block; | |
315 | BLOCK_FUNCTION (block) = symbol; | |
316 | } | |
317 | else | |
318 | BLOCK_FUNCTION (block) = 0; | |
319 | ||
320 | /* Now free the links of the list, and empty the list. */ | |
321 | ||
322 | for (next = *listhead; next; next = next1) | |
323 | { | |
324 | next1 = next->next; | |
325 | free (next); | |
326 | } | |
327 | *listhead = 0; | |
328 | ||
329 | /* Install this block as the superblock | |
330 | of all blocks made since the start of this scope | |
331 | that don't have superblocks yet. */ | |
332 | ||
333 | opblock = 0; | |
334 | for (pblock = pending_blocks; pblock != old_blocks; pblock = pblock->next) | |
335 | { | |
336 | if (BLOCK_SUPERBLOCK (pblock->block) == 0) | |
337 | BLOCK_SUPERBLOCK (pblock->block) = block; | |
338 | opblock = pblock; | |
339 | } | |
340 | ||
341 | /* Record this block on the list of all blocks in the file. | |
342 | Put it after opblock, or at the beginning if opblock is 0. | |
343 | This puts the block in the list after all its subblocks. */ | |
344 | ||
345 | pblock = (struct pending_block *) xmalloc (sizeof (struct pending_block)); | |
346 | pblock->block = block; | |
347 | if (opblock) | |
348 | { | |
349 | pblock->next = opblock->next; | |
350 | opblock->next = pblock; | |
351 | } | |
352 | else | |
353 | { | |
354 | pblock->next = pending_blocks; | |
355 | pending_blocks = pblock; | |
356 | } | |
357 | } | |
358 | ||
359 | static struct blockvector * | |
360 | make_blockvector () | |
361 | { | |
362 | register struct pending_block *next, *next1; | |
363 | register struct blockvector *blockvector; | |
364 | register int i; | |
365 | ||
366 | /* Count the length of the list of blocks. */ | |
367 | ||
368 | for (next = pending_blocks, i = 0; next; next = next->next, i++); | |
369 | ||
370 | blockvector = (struct blockvector *) | |
371 | obstack_alloc (symbol_obstack, sizeof (struct blockvector) + (i - 1) * sizeof (struct block *)); | |
372 | ||
373 | /* Copy the blocks into the blockvector. | |
374 | This is done in reverse order, which happens to put | |
375 | the blocks into the proper order (ascending starting address). | |
376 | finish_block has hair to insert each block into the list | |
377 | after its subblocks in order to make sure this is true. */ | |
378 | ||
379 | BLOCKVECTOR_NBLOCKS (blockvector) = i; | |
380 | for (next = pending_blocks; next; next = next->next) | |
381 | BLOCKVECTOR_BLOCK (blockvector, --i) = next->block; | |
382 | ||
383 | /* Now free the links of the list, and empty the list. */ | |
384 | ||
385 | for (next = pending_blocks; next; next = next1) | |
386 | { | |
387 | next1 = next->next; | |
388 | free (next); | |
389 | } | |
390 | pending_blocks = 0; | |
391 | ||
392 | return blockvector; | |
393 | } | |
394 | ||
395 | /* Manage the vector of line numbers. */ | |
396 | ||
e1ce8aa5 | 397 | static void |
bd5635a1 RP |
398 | record_line (line, pc) |
399 | int line; | |
400 | CORE_ADDR pc; | |
401 | { | |
402 | struct linetable_entry *e; | |
403 | /* Make sure line vector is big enough. */ | |
404 | ||
405 | if (line_vector_index + 2 >= line_vector_length) | |
406 | { | |
407 | line_vector_length *= 2; | |
408 | line_vector = (struct linetable *) | |
409 | xrealloc (line_vector, sizeof (struct linetable) | |
410 | + (line_vector_length | |
411 | * sizeof (struct linetable_entry))); | |
412 | } | |
413 | ||
414 | e = line_vector->item + line_vector_index++; | |
415 | e->line = line; e->pc = pc; | |
416 | } | |
417 | \f | |
418 | /* Start a new symtab for a new source file. | |
419 | This is called when a COFF ".file" symbol is seen; | |
420 | it indicates the start of data for one original source file. */ | |
421 | ||
422 | static void | |
423 | start_symtab () | |
424 | { | |
425 | file_symbols = 0; | |
426 | global_symbols = 0; | |
427 | context_stack = 0; | |
428 | within_function = 0; | |
429 | last_source_file = 0; | |
430 | #ifdef TDESC | |
431 | last_coffsem = 2; | |
432 | last_coffsyn = 0; | |
433 | #endif | |
434 | ||
435 | /* Initialize the source file information for this file. */ | |
436 | ||
437 | line_vector_index = 0; | |
438 | line_vector_length = 1000; | |
439 | prev_line_number = -2; /* Force first line number to be explicit */ | |
440 | line_vector = (struct linetable *) | |
441 | xmalloc (sizeof (struct linetable) | |
442 | + line_vector_length * sizeof (struct linetable_entry)); | |
443 | } | |
444 | ||
445 | /* Save the vital information from when starting to read a file, | |
446 | for use when closing off the current file. | |
447 | NAME is the file name the symbols came from, START_ADDR is the first | |
448 | text address for the file, and SIZE is the number of bytes of text. */ | |
449 | ||
450 | static void | |
451 | complete_symtab (name, start_addr, size) | |
452 | char *name; | |
453 | CORE_ADDR start_addr; | |
454 | unsigned int size; | |
455 | { | |
456 | last_source_file = savestring (name, strlen (name)); | |
457 | cur_src_start_addr = start_addr; | |
458 | cur_src_end_addr = start_addr + size; | |
459 | ||
460 | if (entry_point < cur_src_end_addr | |
461 | && entry_point >= cur_src_start_addr) | |
462 | { | |
463 | startup_file_start = cur_src_start_addr; | |
464 | startup_file_end = cur_src_end_addr; | |
465 | } | |
466 | } | |
467 | ||
468 | /* Finish the symbol definitions for one main source file, | |
469 | close off all the lexical contexts for that file | |
470 | (creating struct block's for them), then make the | |
471 | struct symtab for that file and put it in the list of all such. */ | |
472 | ||
473 | static void | |
474 | end_symtab () | |
475 | { | |
476 | register struct symtab *symtab; | |
477 | register struct context_stack *cstk; | |
478 | register struct blockvector *blockvector; | |
479 | register struct linetable *lv; | |
480 | ||
481 | /* Finish the lexical context of the last function in the file. */ | |
482 | ||
483 | if (context_stack) | |
484 | { | |
485 | cstk = context_stack; | |
486 | context_stack = 0; | |
487 | /* Make a block for the local symbols within. */ | |
488 | finish_block (cstk->name, &local_symbols, cstk->old_blocks, | |
489 | cstk->start_addr, cur_src_end_addr); | |
490 | free (cstk); | |
491 | } | |
492 | ||
493 | /* Ignore a file that has no functions with real debugging info. */ | |
494 | if (pending_blocks == 0 && file_symbols == 0 && global_symbols == 0) | |
495 | { | |
496 | free (line_vector); | |
497 | line_vector = 0; | |
498 | line_vector_length = -1; | |
499 | last_source_file = 0; | |
500 | return; | |
501 | } | |
502 | ||
a6e2b424 JG |
503 | /* Create the two top-level blocks for this file (STATIC_BLOCK and |
504 | GLOBAL_BLOCK). */ | |
bd5635a1 RP |
505 | finish_block (0, &file_symbols, 0, cur_src_start_addr, cur_src_end_addr); |
506 | finish_block (0, &global_symbols, 0, cur_src_start_addr, cur_src_end_addr); | |
507 | ||
508 | /* Create the blockvector that points to all the file's blocks. */ | |
509 | blockvector = make_blockvector (); | |
510 | ||
511 | /* Now create the symtab object for this source file. */ | |
512 | symtab = (struct symtab *) xmalloc (sizeof (struct symtab)); | |
513 | symtab->free_ptr = 0; | |
514 | ||
515 | /* Fill in its components. */ | |
516 | symtab->blockvector = blockvector; | |
517 | symtab->free_code = free_linetable; | |
518 | symtab->filename = last_source_file; | |
b203fc18 | 519 | symtab->dirname = NULL; |
bd5635a1 RP |
520 | lv = line_vector; |
521 | lv->nitems = line_vector_index; | |
522 | symtab->linetable = (struct linetable *) | |
523 | xrealloc (lv, (sizeof (struct linetable) | |
524 | + lv->nitems * sizeof (struct linetable_entry))); | |
525 | symtab->nlines = 0; | |
526 | symtab->line_charpos = 0; | |
527 | ||
b203fc18 JK |
528 | symtab->language = language_unknown; |
529 | symtab->fullname = NULL; | |
530 | ||
bd5635a1 RP |
531 | #ifdef TDESC |
532 | symtab->coffsem = last_coffsem; | |
533 | symtab->coffsyn = last_coffsyn; | |
534 | #endif | |
535 | ||
a6e2b424 JG |
536 | free_named_symtabs (symtab->filename); |
537 | ||
bd5635a1 RP |
538 | /* Link the new symtab into the list of such. */ |
539 | symtab->next = symtab_list; | |
540 | symtab_list = symtab; | |
541 | ||
542 | /* Reinitialize for beginning of new file. */ | |
543 | line_vector = 0; | |
544 | line_vector_length = -1; | |
545 | last_source_file = 0; | |
546 | } | |
547 | \f | |
548 | static void | |
549 | record_misc_function (name, address) | |
550 | char *name; | |
551 | CORE_ADDR address; | |
552 | { | |
553 | #ifdef TDESC | |
554 | /* We don't want TDESC entry points on the misc_function_vector */ | |
555 | if (name[0] == '@') return; | |
556 | #endif | |
557 | /* mf_text isn't true, but apparently COFF doesn't tell us what it really | |
558 | is, so this guess is more useful than mf_unknown. */ | |
559 | prim_record_misc_function (savestring (name, strlen (name)), | |
560 | address, | |
561 | (int)mf_text); | |
562 | } | |
563 | \f | |
564 | /* coff_symfile_init () | |
565 | is the coff-specific initialization routine for reading symbols. | |
566 | It is passed a struct sym_fns which contains, among other things, | |
567 | the BFD for the file whose symbols are being read, and a slot for | |
568 | a pointer to "private data" which we fill with cookies and other | |
569 | treats for coff_symfile_read (). | |
570 | ||
571 | We will only be called if this is a COFF or COFF-like file. | |
572 | BFD handles figuring out the format of the file, and code in symtab.c | |
573 | uses BFD's determination to vector to us. | |
574 | ||
575 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ | |
576 | ||
577 | struct coff_symfile_info { | |
578 | file_ptr min_lineno_offset; /* Where in file lowest line#s are */ | |
579 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ | |
580 | }; | |
581 | ||
582 | void | |
583 | coff_symfile_init (sf) | |
584 | struct sym_fns *sf; | |
585 | { | |
586 | bfd *abfd = sf->sym_bfd; | |
587 | ||
588 | /* Allocate struct to keep track of the symfile */ | |
589 | /* FIXME memory leak */ | |
590 | sf->sym_private = xmalloc (sizeof (struct coff_symfile_info)); | |
591 | ||
592 | #if defined (TDESC) | |
593 | safe_to_init_tdesc_context = 0; | |
594 | #endif | |
595 | ||
596 | /* Save startup file's range of PC addresses to help blockframe.c | |
597 | decide where the bottom of the stack is. */ | |
598 | if (bfd_get_file_flags (abfd) & EXEC_P) | |
599 | { | |
600 | /* Executable file -- record its entry point so we'll recognize | |
601 | the startup file because it contains the entry point. */ | |
602 | entry_point = bfd_get_start_address (abfd); | |
603 | } | |
604 | else | |
605 | { | |
606 | /* Examination of non-executable.o files. Short-circuit this stuff. */ | |
607 | /* ~0 will not be in any file, we hope. */ | |
608 | entry_point = ~0; | |
609 | /* set the startup file to be an empty range. */ | |
610 | startup_file_start = 0; | |
611 | startup_file_end = 0; | |
612 | } | |
613 | } | |
614 | ||
615 | /* This function is called for every section; it finds the outer limits | |
616 | of the line table (minimum and maximum file offset) so that the | |
617 | mainline code can read the whole thing for efficiency. */ | |
618 | ||
e1ce8aa5 | 619 | /* ARGSUSED */ |
bd5635a1 RP |
620 | static void |
621 | find_linenos (abfd, asect, vpinfo) | |
622 | bfd *abfd; | |
623 | sec_ptr asect; | |
624 | void *vpinfo; | |
625 | { | |
626 | struct coff_symfile_info *info; | |
627 | int size, count; | |
628 | file_ptr offset, maxoff; | |
629 | ||
630 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
631 | count = asect->lineno_count; | |
632 | /* End of warning */ | |
633 | ||
634 | if (count == 0) | |
635 | return; | |
b203fc18 JK |
636 | #if !defined (LINESZ) |
637 | /* Just in case, you never know what to expect from those | |
638 | COFF header files. */ | |
639 | #define LINESZ (sizeof (struct lineno)) | |
640 | #endif /* No LINESZ. */ | |
641 | size = count * LINESZ; | |
bd5635a1 RP |
642 | |
643 | info = (struct coff_symfile_info *)vpinfo; | |
644 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
645 | offset = asect->line_filepos; | |
646 | /* End of warning */ | |
647 | ||
648 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) | |
649 | info->min_lineno_offset = offset; | |
650 | ||
651 | maxoff = offset + size; | |
652 | if (maxoff > info->max_lineno_offset) | |
653 | info->max_lineno_offset = maxoff; | |
654 | } | |
655 | ||
656 | ||
e1ce8aa5 JK |
657 | /* The BFD for this file -- only good while we're actively reading |
658 | symbols into a psymtab or a symtab. */ | |
659 | ||
660 | static bfd *symfile_bfd; | |
661 | ||
bd5635a1 RP |
662 | /* Read a symbol file, after initialization by coff_symfile_init. */ |
663 | /* FIXME! Addr and Mainline are not used yet -- this will not work for | |
664 | shared libraries or add_file! */ | |
665 | ||
666 | void | |
667 | coff_symfile_read (sf, addr, mainline) | |
668 | struct sym_fns *sf; | |
669 | CORE_ADDR addr; | |
670 | int mainline; | |
671 | { | |
672 | struct coff_symfile_info *info = (struct coff_symfile_info *)sf->sym_private; | |
673 | bfd *abfd = sf->sym_bfd; | |
674 | char *name = bfd_get_filename (abfd); | |
675 | int desc; | |
676 | register int val; | |
677 | int num_symbols; | |
678 | int symtab_offset; | |
679 | int stringtab_offset; | |
680 | ||
681 | symfile_bfd = abfd; /* Kludge for swap routines */ | |
682 | ||
683 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
684 | desc = fileno ((FILE *)(abfd->iostream)); /* File descriptor */ | |
685 | num_symbols = bfd_get_symcount (abfd); /* How many syms */ | |
686 | symtab_offset = obj_sym_filepos (abfd); /* Symbol table file offset */ | |
687 | stringtab_offset = symtab_offset + num_symbols * SYMESZ; /* String tab */ | |
688 | /* End of warning */ | |
689 | ||
690 | #ifdef TDESC | |
691 | debug_info = text_hdr.s_relptr; | |
692 | if (tdesc_handle) | |
693 | { | |
694 | dc_terminate (tdesc_handle); | |
695 | tdesc_handle = 0; | |
696 | } | |
697 | #endif | |
698 | ||
699 | /* Read the line number table, all at once. */ | |
700 | info->min_lineno_offset = 0; | |
701 | info->max_lineno_offset = 0; | |
702 | bfd_map_over_sections (abfd, find_linenos, info); | |
703 | ||
704 | val = init_lineno (desc, info->min_lineno_offset, | |
705 | info->max_lineno_offset - info->min_lineno_offset); | |
706 | if (val < 0) | |
707 | error ("\"%s\": error reading line numbers\n", name); | |
708 | ||
709 | /* Now read the string table, all at once. */ | |
710 | ||
711 | val = init_stringtab (desc, stringtab_offset); | |
712 | if (val < 0) | |
713 | { | |
714 | free_all_symtabs (); /* FIXME blows whole symtab */ | |
715 | printf ("\"%s\": can't get string table", name); | |
716 | fflush (stdout); | |
717 | return; | |
718 | } | |
719 | make_cleanup (free_stringtab, 0); | |
720 | ||
721 | /* Position to read the symbol table. Do not read it all at once. */ | |
722 | val = lseek (desc, (long)symtab_offset, 0); | |
723 | if (val < 0) | |
724 | perror_with_name (name); | |
725 | ||
726 | init_misc_bunches (); | |
727 | make_cleanup (discard_misc_bunches, 0); | |
728 | ||
729 | /* Now that the executable file is positioned at symbol table, | |
730 | process it and define symbols accordingly. */ | |
731 | ||
732 | read_coff_symtab (desc, num_symbols); | |
733 | ||
734 | patch_opaque_types (); | |
735 | ||
736 | /* Sort symbols alphabetically within each block. */ | |
737 | ||
738 | sort_all_symtab_syms (); | |
739 | ||
740 | /* Go over the misc symbol bunches and install them in vector. */ | |
741 | ||
742 | condense_misc_bunches (0); | |
743 | ||
744 | /* Make a default for file to list. */ | |
745 | ||
746 | select_source_symtab (0); /* FIXME, this might be too slow, see dbxread */ | |
747 | } | |
748 | ||
749 | void | |
750 | coff_symfile_discard () | |
751 | { | |
752 | /* There seems to be nothing to do here. */ | |
753 | } | |
754 | ||
755 | void | |
756 | coff_new_init () | |
757 | { | |
758 | /* There seems to be nothing to do except free_all_symtabs and set | |
759 | symfile to zero, which is done by our caller. */ | |
760 | } | |
761 | \f | |
762 | /* Simplified internal version of coff symbol table information */ | |
763 | ||
764 | struct coff_symbol { | |
765 | char *c_name; | |
766 | int c_symnum; /* symbol number of this entry */ | |
767 | int c_nsyms; /* 1 if syment only, 2 if syment + auxent, etc */ | |
768 | long c_value; | |
769 | int c_sclass; | |
770 | int c_secnum; | |
771 | unsigned int c_type; | |
772 | }; | |
773 | ||
774 | /* Given pointers to a symbol table in coff style exec file, | |
775 | analyze them and create struct symtab's describing the symbols. | |
776 | NSYMS is the number of symbols in the symbol table. | |
777 | We read them one at a time using read_one_sym (). */ | |
778 | ||
779 | static void | |
780 | read_coff_symtab (desc, nsyms) | |
781 | int desc; | |
782 | int nsyms; | |
783 | { | |
784 | int newfd; /* Avoid multiple closes on same desc */ | |
785 | FILE *stream; | |
786 | register struct context_stack *new; | |
787 | struct coff_symbol coff_symbol; | |
788 | register struct coff_symbol *cs = &coff_symbol; | |
789 | static SYMENT main_sym; | |
790 | static AUXENT main_aux; | |
791 | struct coff_symbol fcn_cs_saved; | |
792 | static SYMENT fcn_sym_saved; | |
793 | static AUXENT fcn_aux_saved; | |
794 | ||
795 | /* A .file is open. */ | |
796 | int in_source_file = 0; | |
797 | int num_object_files = 0; | |
798 | int next_file_symnum = -1; | |
799 | ||
800 | /* Name of the current file. */ | |
801 | char *filestring = ""; | |
802 | int depth; | |
803 | int fcn_first_line; | |
804 | int fcn_last_line; | |
805 | int fcn_start_addr; | |
806 | long fcn_line_ptr; | |
807 | struct cleanup *old_chain; | |
808 | ||
809 | ||
810 | newfd = dup (desc); | |
811 | if (newfd == -1) | |
812 | fatal ("Too many open files"); | |
813 | stream = fdopen (newfd, "r"); | |
814 | ||
815 | old_chain = make_cleanup (free_all_symtabs, 0); | |
816 | make_cleanup (fclose, stream); | |
817 | nlist_stream_global = stream; | |
818 | nlist_nsyms_global = nsyms; | |
819 | last_source_file = 0; | |
820 | bzero (opaque_type_chain, sizeof opaque_type_chain); | |
821 | ||
822 | type_vector_length = 160; | |
823 | type_vector = (struct typevector *) | |
824 | xmalloc (sizeof (struct typevector) | |
825 | + type_vector_length * sizeof (struct type *)); | |
826 | bzero (type_vector->type, type_vector_length * sizeof (struct type *)); | |
827 | ||
828 | start_symtab (); | |
829 | ||
830 | symnum = 0; | |
831 | while (symnum < nsyms) | |
832 | { | |
833 | QUIT; /* Make this command interruptable. */ | |
834 | read_one_sym (cs, &main_sym, &main_aux); | |
835 | ||
836 | #ifdef SEM | |
837 | temp_sem_val = cs->c_name[0] << 24 | cs->c_name[1] << 16 | | |
838 | cs->c_name[2] << 8 | cs->c_name[3]; | |
839 | if (int_sem_val == temp_sem_val) | |
840 | last_coffsem = (int) strtol (cs->c_name+4, (char **) NULL, 10); | |
841 | #endif | |
842 | ||
843 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) | |
844 | { | |
845 | if (last_source_file) | |
846 | end_symtab (); | |
847 | ||
848 | start_symtab (); | |
849 | complete_symtab ("_globals_", 0, first_object_file_end); | |
850 | /* done with all files, everything from here on out is globals */ | |
851 | } | |
852 | ||
853 | /* Special case for file with type declarations only, no text. */ | |
8714ff35 JK |
854 | if (!last_source_file && SDB_TYPE (cs->c_type) |
855 | && cs->c_secnum == N_DEBUG) | |
bd5635a1 RP |
856 | complete_symtab (filestring, 0, 0); |
857 | ||
858 | /* Typedefs should not be treated as symbol definitions. */ | |
859 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) | |
860 | { | |
861 | /* record as misc function. if we get '.bf' next, | |
862 | * then we undo this step | |
863 | */ | |
864 | record_misc_function (cs->c_name, cs->c_value); | |
865 | ||
866 | fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; | |
867 | fcn_start_addr = cs->c_value; | |
868 | fcn_cs_saved = *cs; | |
869 | fcn_sym_saved = main_sym; | |
870 | fcn_aux_saved = main_aux; | |
871 | continue; | |
872 | } | |
873 | ||
874 | switch (cs->c_sclass) | |
875 | { | |
876 | case C_EFCN: | |
877 | case C_EXTDEF: | |
878 | case C_ULABEL: | |
879 | case C_USTATIC: | |
880 | case C_LINE: | |
881 | case C_ALIAS: | |
882 | case C_HIDDEN: | |
883 | printf ("Bad n_sclass = %d\n", cs->c_sclass); | |
884 | break; | |
885 | ||
886 | case C_FILE: | |
887 | /* | |
888 | * c_value field contains symnum of next .file entry in table | |
889 | * or symnum of first global after last .file. | |
890 | */ | |
891 | next_file_symnum = cs->c_value; | |
892 | filestring = getfilename (&main_aux); | |
893 | /* | |
894 | * Complete symbol table for last object file | |
895 | * containing debugging information. | |
896 | */ | |
897 | if (last_source_file) | |
898 | { | |
899 | end_symtab (); | |
900 | start_symtab (); | |
901 | } | |
902 | in_source_file = 1; | |
903 | break; | |
904 | ||
905 | case C_STAT: | |
906 | if (cs->c_name[0] == '.') { | |
907 | if (strcmp (cs->c_name, _TEXT) == 0) { | |
908 | if (++num_object_files == 1) { | |
909 | /* last address of startup file */ | |
910 | first_object_file_end = cs->c_value + | |
911 | main_aux.x_scn.x_scnlen; | |
912 | } | |
913 | /* Check for in_source_file deals with case of | |
914 | a file with debugging symbols | |
915 | followed by a later file with no symbols. */ | |
916 | if (in_source_file) | |
917 | complete_symtab (filestring, cs->c_value, | |
918 | main_aux.x_scn.x_scnlen); | |
919 | in_source_file = 0; | |
920 | } | |
921 | /* flush rest of '.' symbols */ | |
922 | break; | |
923 | } | |
8714ff35 | 924 | else if (!SDB_TYPE (cs->c_type) |
bd5635a1 RP |
925 | && cs->c_name[0] == 'L' |
926 | && (strncmp (cs->c_name, "LI%", 3) == 0 | |
8714ff35 | 927 | || strncmp (cs->c_name, "LF%", 3) == 0 |
bd5635a1 RP |
928 | || strncmp (cs->c_name,"LC%",3) == 0 |
929 | || strncmp (cs->c_name,"LP%",3) == 0 | |
930 | || strncmp (cs->c_name,"LPB%",4) == 0 | |
931 | || strncmp (cs->c_name,"LBB%",4) == 0 | |
932 | || strncmp (cs->c_name,"LBE%",4) == 0 | |
933 | || strncmp (cs->c_name,"LPBX%",5) == 0)) | |
934 | /* At least on a 3b1, gcc generates swbeg and string labels | |
935 | that look like this. Ignore them. */ | |
936 | break; | |
937 | /* fall in for static symbols that don't start with '.' */ | |
938 | case C_EXT: | |
939 | if (cs->c_sclass == C_EXT && | |
940 | cs->c_secnum == N_ABS && | |
941 | strcmp (cs->c_name, _ETEXT) == 0) | |
942 | end_of_text_addr = cs->c_value; | |
8714ff35 | 943 | if (!SDB_TYPE (cs->c_type)) { |
bd5635a1 RP |
944 | if (cs->c_secnum <= 1) { /* text or abs */ |
945 | record_misc_function (cs->c_name, cs->c_value); | |
946 | break; | |
947 | } else { | |
948 | cs->c_type = T_INT; | |
949 | } | |
950 | } | |
951 | (void) process_coff_symbol (cs, &main_aux); | |
952 | break; | |
953 | ||
954 | case C_FCN: | |
955 | if (strcmp (cs->c_name, ".bf") == 0) | |
956 | { | |
957 | within_function = 1; | |
958 | ||
959 | /* value contains address of first non-init type code */ | |
960 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
961 | contains line number of '{' } */ | |
962 | fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
963 | ||
964 | new = (struct context_stack *) | |
965 | xmalloc (sizeof (struct context_stack)); | |
966 | new->depth = depth = 0; | |
967 | new->next = 0; | |
968 | context_stack = new; | |
969 | new->locals = 0; | |
970 | new->old_blocks = pending_blocks; | |
971 | new->start_addr = fcn_start_addr; | |
972 | fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); | |
973 | new->name = process_coff_symbol (&fcn_cs_saved, | |
974 | &fcn_aux_saved); | |
975 | } | |
976 | else if (strcmp (cs->c_name, ".ef") == 0) | |
977 | { | |
978 | /* the value of .ef is the address of epilogue code; | |
979 | * not useful for gdb | |
980 | */ | |
981 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
982 | contains number of lines to '}' */ | |
983 | new = context_stack; | |
984 | if (new == 0) | |
985 | { | |
986 | complain (&ef_complaint, cs->c_symnum); | |
987 | within_function = 0; | |
988 | break; | |
989 | } | |
990 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
991 | enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line); | |
992 | ||
993 | finish_block (new->name, &local_symbols, new->old_blocks, | |
994 | new->start_addr, | |
995 | #if defined (FUNCTION_EPILOGUE_SIZE) | |
996 | /* This macro should be defined only on | |
997 | machines where the | |
998 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
999 | field is always zero. | |
1000 | So use the .bf record information that | |
1001 | points to the epilogue and add the size | |
1002 | of the epilogue. */ | |
1003 | cs->c_value + FUNCTION_EPILOGUE_SIZE | |
1004 | #else | |
1005 | fcn_cs_saved.c_value + | |
1006 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
1007 | #endif | |
1008 | ); | |
1009 | context_stack = 0; | |
1010 | within_function = 0; | |
1011 | free (new); | |
1012 | } | |
1013 | break; | |
1014 | ||
1015 | case C_BLOCK: | |
1016 | if (strcmp (cs->c_name, ".bb") == 0) | |
1017 | { | |
1018 | new = (struct context_stack *) | |
1019 | xmalloc (sizeof (struct context_stack)); | |
1020 | depth++; | |
1021 | new->depth = depth; | |
1022 | new->next = context_stack; | |
1023 | context_stack = new; | |
1024 | new->locals = local_symbols; | |
1025 | new->old_blocks = pending_blocks; | |
1026 | new->start_addr = cs->c_value; | |
1027 | new->name = 0; | |
1028 | local_symbols = 0; | |
1029 | } | |
1030 | else if (strcmp (cs->c_name, ".eb") == 0) | |
1031 | { | |
1032 | new = context_stack; | |
1033 | if (new == 0 || depth != new->depth) | |
1034 | error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.", | |
1035 | symnum); | |
1036 | if (local_symbols && context_stack->next) | |
1037 | { | |
1038 | /* Make a block for the local symbols within. */ | |
1039 | finish_block (0, &local_symbols, new->old_blocks, | |
1040 | new->start_addr, cs->c_value); | |
1041 | } | |
1042 | depth--; | |
1043 | local_symbols = new->locals; | |
1044 | context_stack = new->next; | |
1045 | free (new); | |
1046 | } | |
1047 | break; | |
1048 | #ifdef TDESC | |
1049 | case C_VERSION: | |
1050 | if (strcmp (cs->c_name, ".coffsyn") == 0) | |
1051 | last_coffsyn = cs->c_value; | |
1052 | else if ((strcmp (cs->c_name, ".coffsem") == 0) && | |
1053 | (cs->c_value != 0)) | |
1054 | last_coffsem = cs->c_value; | |
1055 | break; | |
1056 | #endif | |
1057 | ||
1058 | default: | |
1059 | #ifdef TDESC | |
1060 | if ((strcmp (cs->c_name, ".coffsem") == 0) && | |
1061 | (cs->c_value != 0)) | |
1062 | last_coffsem = cs->c_value; | |
1063 | else | |
1064 | #endif | |
1065 | (void) process_coff_symbol (cs, &main_aux); | |
1066 | break; | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | if (last_source_file) | |
1071 | end_symtab (); | |
1072 | fclose (stream); | |
1073 | discard_cleanups (old_chain); | |
1074 | } | |
1075 | \f | |
1076 | /* Routines for reading headers and symbols from executable. */ | |
1077 | ||
1078 | #ifdef FIXME | |
1079 | /* Move these XXXMAGIC symbol defns into BFD! */ | |
1080 | ||
1081 | /* Read COFF file header, check magic number, | |
1082 | and return number of symbols. */ | |
1083 | read_file_hdr (chan, file_hdr) | |
1084 | int chan; | |
1085 | FILHDR *file_hdr; | |
1086 | { | |
1087 | lseek (chan, 0L, 0); | |
1088 | if (myread (chan, (char *)file_hdr, FILHSZ) < 0) | |
1089 | return -1; | |
1090 | ||
1091 | switch (file_hdr->f_magic) | |
1092 | { | |
1093 | #ifdef MC68MAGIC | |
1094 | case MC68MAGIC: | |
1095 | #endif | |
1096 | #ifdef NS32GMAGIC | |
1097 | case NS32GMAGIC: | |
1098 | case NS32SMAGIC: | |
1099 | #endif | |
1100 | #ifdef I386MAGIC | |
1101 | case I386MAGIC: | |
1102 | #endif | |
1103 | #ifdef CLIPPERMAGIC | |
1104 | case CLIPPERMAGIC: | |
1105 | #endif | |
1106 | #if defined (MC68KWRMAGIC) \ | |
1107 | && (!defined (MC68MAGIC) || MC68KWRMAGIC != MC68MAGIC) | |
1108 | case MC68KWRMAGIC: | |
1109 | #endif | |
1110 | #ifdef MC68KROMAGIC | |
1111 | case MC68KROMAGIC: | |
1112 | case MC68KPGMAGIC: | |
1113 | #endif | |
1114 | #ifdef MC88DGMAGIC | |
1115 | case MC88DGMAGIC: | |
1116 | #endif | |
1117 | #ifdef MC88MAGIC | |
1118 | case MC88MAGIC: | |
1119 | #endif | |
1120 | #ifdef I960ROMAGIC | |
1121 | case I960ROMAGIC: /* Intel 960 */ | |
1122 | #endif | |
1123 | #ifdef I960RWMAGIC | |
1124 | case I960RWMAGIC: /* Intel 960 */ | |
1125 | #endif | |
1126 | return file_hdr->f_nsyms; | |
1127 | ||
1128 | default: | |
1129 | #ifdef BADMAG | |
1130 | if (BADMAG(file_hdr)) | |
1131 | return -1; | |
1132 | else | |
1133 | return file_hdr->f_nsyms; | |
1134 | #else | |
1135 | return -1; | |
1136 | #endif | |
1137 | } | |
1138 | } | |
1139 | #endif | |
1140 | ||
1141 | ||
1142 | static void | |
1143 | read_one_sym (cs, sym, aux) | |
1144 | register struct coff_symbol *cs; | |
1145 | register SYMENT *sym; | |
1146 | register AUXENT *aux; | |
1147 | { | |
1148 | AUXENT temp_aux; | |
1149 | int i; | |
1150 | ||
1151 | cs->c_symnum = symnum; | |
1152 | fread ((char *)sym, SYMESZ, 1, nlist_stream_global); | |
1153 | bfd_coff_swap_sym (symfile_bfd, sym); | |
1154 | cs->c_nsyms = (sym->n_numaux & 0xff) + 1; | |
1155 | if (cs->c_nsyms >= 2) | |
1156 | { | |
1157 | fread ((char *)aux, AUXESZ, 1, nlist_stream_global); | |
1158 | bfd_coff_swap_aux (symfile_bfd, aux, sym->n_type, sym->n_sclass); | |
1159 | /* If more than one aux entry, read past it (only the first aux | |
1160 | is important). */ | |
1161 | for (i = 2; i < cs->c_nsyms; i++) | |
1162 | fread ((char *)&temp_aux, AUXESZ, 1, nlist_stream_global); | |
1163 | } | |
1164 | cs->c_name = getsymname (sym); | |
1165 | cs->c_value = sym->n_value; | |
1166 | cs->c_sclass = (sym->n_sclass & 0xff); | |
1167 | cs->c_secnum = sym->n_scnum; | |
1168 | cs->c_type = (unsigned) sym->n_type; | |
8714ff35 JK |
1169 | if (!SDB_TYPE (cs->c_type)) |
1170 | cs->c_type = 0; | |
bd5635a1 RP |
1171 | |
1172 | symnum += cs->c_nsyms; | |
1173 | } | |
1174 | \f | |
1175 | /* Support for string table handling */ | |
1176 | ||
1177 | static char *stringtab = NULL; | |
1178 | ||
1179 | static int | |
1180 | init_stringtab (chan, offset) | |
1181 | int chan; | |
1182 | long offset; | |
1183 | { | |
1184 | long length; | |
1185 | int val; | |
1186 | unsigned char lengthbuf[4]; | |
1187 | ||
1188 | if (stringtab) | |
1189 | { | |
1190 | free (stringtab); | |
1191 | stringtab = NULL; | |
1192 | } | |
1193 | ||
1194 | if (lseek (chan, offset, 0) < 0) | |
1195 | return -1; | |
1196 | ||
1197 | val = myread (chan, (char *)lengthbuf, sizeof lengthbuf); | |
1198 | length = bfd_h_getlong (symfile_bfd, lengthbuf); | |
1199 | ||
1200 | /* If no string table is needed, then the file may end immediately | |
1201 | after the symbols. Just return with `stringtab' set to null. */ | |
1202 | if (val != sizeof length || length < sizeof length) | |
1203 | return 0; | |
1204 | ||
1205 | stringtab = (char *) xmalloc (length); | |
1206 | if (stringtab == NULL) | |
1207 | return -1; | |
1208 | ||
1209 | bcopy (&length, stringtab, sizeof length); | |
1210 | if (length == sizeof length) /* Empty table -- just the count */ | |
1211 | return 0; | |
1212 | ||
1213 | val = myread (chan, stringtab + sizeof length, length - sizeof length); | |
1214 | if (val != length - sizeof length || stringtab[length - 1] != '\0') | |
1215 | return -1; | |
1216 | ||
1217 | return 0; | |
1218 | } | |
1219 | ||
1220 | static void | |
1221 | free_stringtab () | |
1222 | { | |
1223 | if (stringtab) | |
1224 | free (stringtab); | |
1225 | stringtab = NULL; | |
1226 | } | |
1227 | ||
1228 | static char * | |
1229 | getsymname (symbol_entry) | |
1230 | SYMENT *symbol_entry; | |
1231 | { | |
1232 | static char buffer[SYMNMLEN+1]; | |
1233 | char *result; | |
1234 | ||
1235 | if (symbol_entry->n_zeroes == 0) | |
1236 | { | |
1237 | result = stringtab + symbol_entry->n_offset; | |
1238 | } | |
1239 | else | |
1240 | { | |
1241 | strncpy (buffer, symbol_entry->n_name, SYMNMLEN); | |
1242 | buffer[SYMNMLEN] = '\0'; | |
1243 | result = buffer; | |
1244 | } | |
1245 | return result; | |
1246 | } | |
1247 | ||
1248 | static char * | |
1249 | getfilename (aux_entry) | |
1250 | AUXENT *aux_entry; | |
1251 | { | |
1252 | static char buffer[BUFSIZ]; | |
1253 | register char *temp; | |
1254 | char *result; | |
1255 | extern char *rindex (); | |
1256 | ||
1257 | #ifndef COFF_NO_LONG_FILE_NAMES | |
1258 | if (aux_entry->x_file.x_n.x_zeroes == 0) | |
1259 | strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); | |
1260 | else | |
1261 | #endif /* COFF_NO_LONG_FILE_NAMES */ | |
1262 | { | |
1263 | #if defined (x_name) | |
1264 | /* Data General. */ | |
1265 | strncpy (buffer, aux_entry->x_name, FILNMLEN); | |
1266 | #else | |
1267 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); | |
1268 | #endif | |
1269 | buffer[FILNMLEN] = '\0'; | |
1270 | } | |
1271 | result = buffer; | |
1272 | if ((temp = rindex (result, '/')) != NULL) | |
1273 | result = temp + 1; | |
1274 | return (result); | |
1275 | } | |
1276 | \f | |
1277 | /* Support for line number handling */ | |
1278 | static char *linetab = NULL; | |
1279 | static long linetab_offset; | |
1280 | static unsigned long linetab_size; | |
1281 | ||
1282 | /* Read in all the line numbers for fast lookups later. */ | |
1283 | ||
1284 | static int | |
1285 | init_lineno (chan, offset, size) | |
1286 | int chan; | |
1287 | long offset; | |
1288 | int size; | |
1289 | { | |
1290 | int val; | |
1291 | register char *p, *q; | |
1292 | ||
1293 | if (lseek (chan, offset, 0) < 0) | |
1294 | return -1; | |
1295 | ||
1296 | linetab = (char *) xmalloc (size); | |
1297 | ||
1298 | val = myread (chan, linetab, size); | |
1299 | if (val != size) | |
1300 | return -1; | |
1301 | ||
1302 | /* Swap all entries */ | |
1303 | q = linetab + size; | |
1304 | for (p = linetab; p < q; p += LINESZ) | |
1305 | bfd_coff_swap_lineno (symfile_bfd, (LINENO *)p); | |
1306 | ||
1307 | linetab_offset = offset; | |
1308 | linetab_size = size; | |
1309 | make_cleanup (free, linetab); /* Be sure it gets de-allocated. */ | |
1310 | return 0; | |
1311 | } | |
1312 | ||
1313 | #if !defined (L_LNNO32) | |
1314 | #define L_LNNO32(lp) ((lp)->l_lnno) | |
1315 | #endif | |
1316 | ||
1317 | static void | |
1318 | enter_linenos (file_offset, first_line, last_line) | |
1319 | long file_offset; | |
1320 | register int first_line; | |
1321 | register int last_line; | |
1322 | { | |
1323 | register char *rawptr; | |
1324 | struct lineno lptr; | |
1325 | ||
1326 | if (file_offset < linetab_offset) | |
1327 | { | |
63989338 JG |
1328 | complain (lineno_complaint, file_offset); |
1329 | if (file_offset > linetab_size) /* Too big to be an offset? */ | |
1330 | return; | |
1331 | file_offset += linetab_offset; /* Try reading at that linetab offset */ | |
bd5635a1 RP |
1332 | } |
1333 | ||
1334 | rawptr = &linetab[file_offset - linetab_offset]; | |
1335 | ||
1336 | /* skip first line entry for each function */ | |
1337 | rawptr += LINESZ; | |
1338 | /* line numbers start at one for the first line of the function */ | |
1339 | first_line--; | |
1340 | ||
1341 | /* Bcopy since occaisionally rawptr isn't pointing at long | |
63989338 | 1342 | boundaries. */ |
bd5635a1 RP |
1343 | for (bcopy (rawptr, &lptr, LINESZ); |
1344 | L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line; | |
1345 | rawptr += LINESZ, bcopy (rawptr, &lptr, LINESZ)) | |
1346 | { | |
1347 | record_line (first_line + L_LNNO32 (&lptr), lptr.l_addr.l_paddr); | |
1348 | } | |
1349 | } | |
1350 | \f | |
1351 | static int | |
1352 | hashname (name) | |
1353 | char *name; | |
1354 | { | |
1355 | register char *p = name; | |
1356 | register int total = p[0]; | |
1357 | register int c; | |
1358 | ||
1359 | c = p[1]; | |
1360 | total += c << 2; | |
1361 | if (c) | |
1362 | { | |
1363 | c = p[2]; | |
1364 | total += c << 4; | |
1365 | if (c) | |
1366 | total += p[3] << 6; | |
1367 | } | |
1368 | ||
1369 | return total % HASHSIZE; | |
1370 | } | |
1371 | ||
1372 | static void | |
1373 | patch_type (type, real_type) | |
1374 | struct type *type; | |
1375 | struct type *real_type; | |
1376 | { | |
1377 | register struct type *target = TYPE_TARGET_TYPE (type); | |
1378 | register struct type *real_target = TYPE_TARGET_TYPE (real_type); | |
1379 | int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); | |
1380 | ||
1381 | TYPE_LENGTH (target) = TYPE_LENGTH (real_target); | |
1382 | TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); | |
1383 | TYPE_FIELDS (target) = (struct field *) | |
1384 | obstack_alloc (symbol_obstack, field_size); | |
1385 | ||
1386 | bcopy (TYPE_FIELDS (real_target), TYPE_FIELDS (target), field_size); | |
1387 | ||
1388 | if (TYPE_NAME (real_target)) | |
1389 | { | |
1390 | if (TYPE_NAME (target)) | |
1391 | free (TYPE_NAME (target)); | |
1392 | TYPE_NAME (target) = concat (TYPE_NAME (real_target), "", ""); | |
1393 | } | |
1394 | } | |
1395 | ||
1396 | /* Patch up all appropriate typdef symbols in the opaque_type_chains | |
1397 | so that they can be used to print out opaque data structures properly */ | |
1398 | ||
1399 | static void | |
1400 | patch_opaque_types () | |
1401 | { | |
1402 | struct symtab *s; | |
1403 | ||
1404 | /* Look at each symbol in the per-file block of each symtab. */ | |
1405 | for (s = symtab_list; s; s = s->next) | |
1406 | { | |
1407 | register struct block *b; | |
1408 | register int i; | |
1409 | ||
1410 | /* Go through the per-file symbols only */ | |
a6e2b424 | 1411 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); |
bd5635a1 RP |
1412 | for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--) |
1413 | { | |
1414 | register struct symbol *real_sym; | |
1415 | ||
1416 | /* Find completed typedefs to use to fix opaque ones. | |
1417 | Remove syms from the chain when their types are stored, | |
1418 | but search the whole chain, as there may be several syms | |
1419 | from different files with the same name. */ | |
1420 | real_sym = BLOCK_SYM (b, i); | |
1421 | if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF && | |
1422 | SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE && | |
1423 | TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR && | |
1424 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) | |
1425 | { | |
1426 | register char *name = SYMBOL_NAME (real_sym); | |
1427 | register int hash = hashname (name); | |
1428 | register struct symbol *sym, *prev; | |
1429 | ||
1430 | prev = 0; | |
1431 | for (sym = opaque_type_chain[hash]; sym;) | |
1432 | { | |
1433 | if (name[0] == SYMBOL_NAME (sym)[0] && | |
1434 | !strcmp (name + 1, SYMBOL_NAME (sym) + 1)) | |
1435 | { | |
1436 | if (prev) | |
1437 | SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); | |
1438 | else | |
1439 | opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); | |
1440 | ||
1441 | patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); | |
1442 | ||
1443 | if (prev) | |
1444 | sym = SYMBOL_VALUE_CHAIN (prev); | |
1445 | else | |
1446 | sym = opaque_type_chain[hash]; | |
1447 | } | |
1448 | else | |
1449 | { | |
1450 | prev = sym; | |
1451 | sym = SYMBOL_VALUE_CHAIN (sym); | |
1452 | } | |
1453 | } | |
1454 | } | |
1455 | } | |
1456 | } | |
1457 | } | |
1458 | \f | |
1459 | #if defined (clipper) | |
1460 | #define BELIEVE_PCC_PROMOTION 1 | |
1461 | #endif | |
1462 | ||
1463 | static struct symbol * | |
1464 | process_coff_symbol (cs, aux) | |
1465 | register struct coff_symbol *cs; | |
1466 | register AUXENT *aux; | |
1467 | { | |
1468 | register struct symbol *sym | |
1469 | = (struct symbol *) obstack_alloc (symbol_obstack, sizeof (struct symbol)); | |
1470 | char *name; | |
1471 | #ifdef NAMES_HAVE_UNDERSCORE | |
1472 | int offset = 1; | |
1473 | #else | |
1474 | int offset = 0; | |
1475 | #endif | |
1476 | ||
1477 | bzero (sym, sizeof (struct symbol)); | |
1478 | name = cs->c_name; | |
1479 | name = (name[0] == '_' ? name + offset : name); | |
1480 | SYMBOL_NAME (sym) = obstack_copy0 (symbol_obstack, name, strlen (name)); | |
1481 | ||
1482 | /* default assumptions */ | |
1483 | SYMBOL_VALUE (sym) = cs->c_value; | |
1484 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1485 | ||
1486 | if (ISFCN (cs->c_type)) | |
1487 | { | |
1488 | SYMBOL_TYPE (sym) = | |
1489 | lookup_function_type (decode_function_type (cs, cs->c_type, aux)); | |
1490 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
1491 | if (cs->c_sclass == C_STAT) | |
1492 | add_symbol_to_list (sym, &file_symbols); | |
1493 | else if (cs->c_sclass == C_EXT) | |
1494 | add_symbol_to_list (sym, &global_symbols); | |
1495 | } | |
1496 | else | |
1497 | { | |
1498 | SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux); | |
1499 | switch (cs->c_sclass) | |
1500 | { | |
1501 | case C_NULL: | |
1502 | break; | |
1503 | ||
1504 | case C_AUTO: | |
1505 | SYMBOL_CLASS (sym) = LOC_LOCAL; | |
1506 | add_symbol_to_list (sym, &local_symbols); | |
1507 | break; | |
1508 | ||
1509 | case C_EXT: | |
1510 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1511 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
1512 | add_symbol_to_list (sym, &global_symbols); | |
1513 | break; | |
1514 | ||
1515 | case C_STAT: | |
1516 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1517 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
1518 | if (within_function) { | |
1519 | /* Static symbol of local scope */ | |
1520 | add_symbol_to_list (sym, &local_symbols); | |
1521 | } | |
1522 | else { | |
1523 | /* Static symbol at top level of file */ | |
1524 | add_symbol_to_list (sym, &file_symbols); | |
1525 | } | |
1526 | break; | |
1527 | ||
1528 | case C_REG: | |
1529 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
1530 | add_symbol_to_list (sym, &local_symbols); | |
1531 | break; | |
1532 | ||
1533 | case C_LABEL: | |
1534 | break; | |
1535 | ||
1536 | case C_ARG: | |
1537 | SYMBOL_CLASS (sym) = LOC_ARG; | |
1538 | add_symbol_to_list (sym, &local_symbols); | |
1539 | #if !defined (BELIEVE_PCC_PROMOTION) | |
1540 | /* If PCC says a parameter is a short or a char, | |
1541 | it is really an int. */ | |
1542 | if (SYMBOL_TYPE (sym) == builtin_type_char | |
1543 | || SYMBOL_TYPE (sym) == builtin_type_short) | |
1544 | SYMBOL_TYPE (sym) = builtin_type_int; | |
1545 | else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char | |
1546 | || SYMBOL_TYPE (sym) == builtin_type_unsigned_short) | |
1547 | SYMBOL_TYPE (sym) = builtin_type_unsigned_int; | |
1548 | #endif | |
1549 | break; | |
1550 | ||
1551 | case C_REGPARM: | |
1552 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
1553 | add_symbol_to_list (sym, &local_symbols); | |
1554 | #if !defined (BELIEVE_PCC_PROMOTION) | |
1555 | /* If PCC says a parameter is a short or a char, | |
1556 | it is really an int. */ | |
1557 | if (SYMBOL_TYPE (sym) == builtin_type_char | |
1558 | || SYMBOL_TYPE (sym) == builtin_type_short) | |
1559 | SYMBOL_TYPE (sym) = builtin_type_int; | |
1560 | else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char | |
1561 | || SYMBOL_TYPE (sym) == builtin_type_unsigned_short) | |
1562 | SYMBOL_TYPE (sym) = builtin_type_unsigned_int; | |
1563 | #endif | |
1564 | break; | |
1565 | ||
1566 | case C_TPDEF: | |
1567 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1568 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1569 | ||
1570 | /* If type has no name, give it one */ | |
1571 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0 | |
1572 | && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0) | |
1573 | TYPE_NAME (SYMBOL_TYPE (sym)) | |
1574 | = concat (SYMBOL_NAME (sym), "", ""); | |
1575 | ||
1576 | /* Keep track of any type which points to empty structured type, | |
1577 | so it can be filled from a definition from another file */ | |
1578 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && | |
1579 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0) | |
1580 | { | |
1581 | register int i = hashname (SYMBOL_NAME (sym)); | |
1582 | ||
1583 | SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; | |
1584 | opaque_type_chain[i] = sym; | |
1585 | } | |
1586 | add_symbol_to_list (sym, &file_symbols); | |
1587 | break; | |
1588 | ||
1589 | case C_STRTAG: | |
1590 | case C_UNTAG: | |
1591 | case C_ENTAG: | |
1592 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1593 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
1594 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0 | |
1595 | && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0) | |
1596 | TYPE_NAME (SYMBOL_TYPE (sym)) | |
1597 | = concat ("", | |
1598 | (cs->c_sclass == C_ENTAG | |
1599 | ? "enum " | |
1600 | : (cs->c_sclass == C_STRTAG | |
1601 | ? "struct " : "union ")), | |
1602 | SYMBOL_NAME (sym)); | |
1603 | add_symbol_to_list (sym, &file_symbols); | |
1604 | break; | |
1605 | ||
1606 | default: | |
1607 | break; | |
1608 | } | |
1609 | } | |
1610 | return sym; | |
1611 | } | |
1612 | \f | |
1613 | /* Decode a coff type specifier; | |
1614 | return the type that is meant. */ | |
1615 | ||
1616 | static | |
1617 | struct type * | |
1618 | decode_type (cs, c_type, aux) | |
1619 | register struct coff_symbol *cs; | |
1620 | unsigned int c_type; | |
1621 | register AUXENT *aux; | |
1622 | { | |
1623 | register struct type *type = 0; | |
1624 | unsigned int new_c_type; | |
1625 | ||
1626 | if (c_type & ~N_BTMASK) | |
1627 | { | |
1628 | new_c_type = DECREF (c_type); | |
1629 | if (ISPTR (c_type)) | |
1630 | { | |
1631 | type = decode_type (cs, new_c_type, aux); | |
1632 | type = lookup_pointer_type (type); | |
1633 | } | |
1634 | else if (ISFCN (c_type)) | |
1635 | { | |
1636 | type = decode_type (cs, new_c_type, aux); | |
1637 | type = lookup_function_type (type); | |
1638 | } | |
1639 | else if (ISARY (c_type)) | |
1640 | { | |
1641 | int i, n; | |
1642 | register unsigned short *dim; | |
1643 | struct type *base_type; | |
1644 | ||
1645 | /* Define an array type. */ | |
1646 | /* auxent refers to array, not base type */ | |
1647 | if (aux->x_sym.x_tagndx == 0) | |
1648 | cs->c_nsyms = 1; | |
1649 | ||
1650 | /* shift the indices down */ | |
1651 | dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; | |
1652 | i = 1; | |
1653 | n = dim[0]; | |
1654 | for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) | |
1655 | *dim = *(dim + 1); | |
1656 | *dim = 0; | |
1657 | ||
1658 | type = (struct type *) | |
1659 | obstack_alloc (symbol_obstack, sizeof (struct type)); | |
1660 | bzero (type, sizeof (struct type)); | |
1661 | ||
1662 | base_type = decode_type (cs, new_c_type, aux); | |
1663 | ||
1664 | TYPE_CODE (type) = TYPE_CODE_ARRAY; | |
1665 | TYPE_TARGET_TYPE (type) = base_type; | |
1666 | TYPE_LENGTH (type) = n * TYPE_LENGTH (base_type); | |
1667 | } | |
1668 | return type; | |
1669 | } | |
1670 | ||
1671 | /* Reference to existing type */ | |
1672 | if (cs->c_nsyms > 1 && aux->x_sym.x_tagndx != 0) | |
1673 | { | |
1674 | type = coff_alloc_type (aux->x_sym.x_tagndx); | |
1675 | return type; | |
1676 | } | |
1677 | ||
1678 | return decode_base_type (cs, BTYPE (c_type), aux); | |
1679 | } | |
1680 | ||
1681 | /* Decode a coff type specifier for function definition; | |
1682 | return the type that the function returns. */ | |
1683 | ||
1684 | static | |
1685 | struct type * | |
1686 | decode_function_type (cs, c_type, aux) | |
1687 | register struct coff_symbol *cs; | |
1688 | unsigned int c_type; | |
1689 | register AUXENT *aux; | |
1690 | { | |
1691 | if (aux->x_sym.x_tagndx == 0) | |
1692 | cs->c_nsyms = 1; /* auxent refers to function, not base type */ | |
1693 | ||
1694 | return decode_type (cs, DECREF (c_type), aux); | |
1695 | } | |
1696 | \f | |
1697 | /* basic C types */ | |
1698 | ||
1699 | static | |
1700 | struct type * | |
1701 | decode_base_type (cs, c_type, aux) | |
1702 | register struct coff_symbol *cs; | |
1703 | unsigned int c_type; | |
1704 | register AUXENT *aux; | |
1705 | { | |
1706 | struct type *type; | |
1707 | ||
1708 | switch (c_type) | |
1709 | { | |
1710 | case T_NULL: | |
1711 | /* shows up with "void (*foo)();" structure members */ | |
1712 | return builtin_type_void; | |
1713 | ||
1714 | #ifdef T_ARG | |
1715 | case T_ARG: | |
1716 | /* Shows up in DGUX, I think. Not sure where. */ | |
1717 | return builtin_type_void; /* shouldn't show up here */ | |
1718 | #endif | |
1719 | ||
1720 | #ifdef T_VOID | |
1721 | case T_VOID: | |
1722 | /* Intel 960 COFF has this symbol and meaning. */ | |
1723 | return builtin_type_void; | |
1724 | #endif | |
1725 | ||
1726 | case T_CHAR: | |
1727 | return builtin_type_char; | |
1728 | ||
1729 | case T_SHORT: | |
1730 | return builtin_type_short; | |
1731 | ||
1732 | case T_INT: | |
1733 | return builtin_type_int; | |
1734 | ||
1735 | case T_LONG: | |
1736 | return builtin_type_long; | |
1737 | ||
1738 | case T_FLOAT: | |
1739 | return builtin_type_float; | |
1740 | ||
1741 | case T_DOUBLE: | |
1742 | return builtin_type_double; | |
1743 | ||
1744 | case T_STRUCT: | |
1745 | if (cs->c_nsyms != 2) | |
1746 | { | |
1747 | /* anonymous structure type */ | |
1748 | type = coff_alloc_type (cs->c_symnum); | |
1749 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1750 | TYPE_NAME (type) = concat ("struct ", "<opaque>", ""); | |
1751 | TYPE_LENGTH (type) = 0; | |
1752 | TYPE_FIELDS (type) = 0; | |
1753 | TYPE_NFIELDS (type) = 0; | |
1754 | } | |
1755 | else | |
1756 | { | |
1757 | type = read_struct_type (cs->c_symnum, | |
1758 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1759 | aux->x_sym.x_fcnary.x_fcn.x_endndx); | |
1760 | } | |
1761 | return type; | |
1762 | ||
1763 | case T_UNION: | |
1764 | if (cs->c_nsyms != 2) | |
1765 | { | |
1766 | /* anonymous union type */ | |
1767 | type = coff_alloc_type (cs->c_symnum); | |
1768 | TYPE_NAME (type) = concat ("union ", "<opaque>", ""); | |
1769 | TYPE_LENGTH (type) = 0; | |
1770 | TYPE_FIELDS (type) = 0; | |
1771 | TYPE_NFIELDS (type) = 0; | |
1772 | } | |
1773 | else | |
1774 | { | |
1775 | type = read_struct_type (cs->c_symnum, | |
1776 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1777 | aux->x_sym.x_fcnary.x_fcn.x_endndx); | |
1778 | } | |
1779 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1780 | return type; | |
1781 | ||
1782 | case T_ENUM: | |
1783 | return read_enum_type (cs->c_symnum, | |
1784 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1785 | aux->x_sym.x_fcnary.x_fcn.x_endndx); | |
1786 | ||
1787 | case T_MOE: | |
1788 | /* shouldn't show up here */ | |
1789 | break; | |
1790 | ||
1791 | case T_UCHAR: | |
1792 | return builtin_type_unsigned_char; | |
1793 | ||
1794 | case T_USHORT: | |
1795 | return builtin_type_unsigned_short; | |
1796 | ||
1797 | case T_UINT: | |
1798 | return builtin_type_unsigned_int; | |
1799 | ||
1800 | case T_ULONG: | |
1801 | return builtin_type_unsigned_long; | |
1802 | } | |
1803 | printf ("unexpected type %d at symnum %d\n", c_type, cs->c_symnum); | |
1804 | return builtin_type_void; | |
1805 | } | |
1806 | \f | |
1807 | /* This page contains subroutines of read_type. */ | |
1808 | ||
1809 | /* Read the description of a structure (or union type) | |
1810 | and return an object describing the type. */ | |
1811 | ||
1812 | static struct type * | |
1813 | read_struct_type (index, length, lastsym) | |
1814 | int index; | |
1815 | int length; | |
1816 | int lastsym; | |
1817 | { | |
1818 | struct nextfield | |
1819 | { | |
1820 | struct nextfield *next; | |
1821 | struct field field; | |
1822 | }; | |
1823 | ||
1824 | register struct type *type; | |
1825 | register struct nextfield *list = 0; | |
1826 | struct nextfield *new; | |
1827 | int nfields = 0; | |
1828 | register int n; | |
1829 | char *name; | |
1830 | #ifdef NAMES_HAVE_UNDERSCORE | |
1831 | int offset = 1; | |
1832 | #else | |
1833 | int offset = 0; | |
1834 | #endif | |
1835 | struct coff_symbol member_sym; | |
1836 | register struct coff_symbol *ms = &member_sym; | |
1837 | SYMENT sub_sym; | |
1838 | AUXENT sub_aux; | |
1839 | int done = 0; | |
1840 | ||
1841 | type = coff_alloc_type (index); | |
1842 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1843 | TYPE_LENGTH (type) = length; | |
1844 | ||
1845 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
1846 | { | |
1847 | read_one_sym (ms, &sub_sym, &sub_aux); | |
1848 | name = ms->c_name; | |
1849 | name = (name[0] == '_' ? name + offset : name); | |
1850 | ||
1851 | switch (ms->c_sclass) | |
1852 | { | |
1853 | case C_MOS: | |
1854 | case C_MOU: | |
1855 | ||
1856 | /* Get space to record the next field's data. */ | |
1857 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1858 | new->next = list; | |
1859 | list = new; | |
1860 | ||
1861 | /* Save the data. */ | |
1862 | list->field.name = savestring (name, strlen (name)); | |
1863 | list->field.type = decode_type (ms, ms->c_type, &sub_aux); | |
1864 | list->field.bitpos = 8 * ms->c_value; | |
1865 | list->field.bitsize = 0; | |
1866 | nfields++; | |
1867 | break; | |
1868 | ||
1869 | case C_FIELD: | |
1870 | ||
1871 | /* Get space to record the next field's data. */ | |
1872 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1873 | new->next = list; | |
1874 | list = new; | |
1875 | ||
1876 | /* Save the data. */ | |
1877 | list->field.name = savestring (name, strlen (name)); | |
1878 | list->field.type = decode_type (ms, ms->c_type, &sub_aux); | |
1879 | list->field.bitpos = ms->c_value; | |
1880 | list->field.bitsize = sub_aux.x_sym.x_misc.x_lnsz.x_size; | |
1881 | nfields++; | |
1882 | break; | |
1883 | ||
1884 | case C_EOS: | |
1885 | done = 1; | |
1886 | break; | |
1887 | } | |
1888 | } | |
1889 | /* Now create the vector of fields, and record how big it is. */ | |
1890 | ||
1891 | TYPE_NFIELDS (type) = nfields; | |
1892 | TYPE_FIELDS (type) = (struct field *) | |
1893 | obstack_alloc (symbol_obstack, sizeof (struct field) * nfields); | |
1894 | ||
1895 | /* Copy the saved-up fields into the field vector. */ | |
1896 | ||
1897 | for (n = nfields; list; list = list->next) | |
1898 | TYPE_FIELD (type, --n) = list->field; | |
1899 | ||
1900 | return type; | |
1901 | } | |
1902 | \f | |
1903 | /* Read a definition of an enumeration type, | |
1904 | and create and return a suitable type object. | |
1905 | Also defines the symbols that represent the values of the type. */ | |
e1ce8aa5 | 1906 | /* Currently assumes it's sizeof (int) and doesn't use length. */ |
bd5635a1 RP |
1907 | |
1908 | static struct type * | |
1909 | read_enum_type (index, length, lastsym) | |
1910 | int index; | |
1911 | int length; | |
1912 | int lastsym; | |
1913 | { | |
1914 | register struct symbol *sym; | |
1915 | register struct type *type; | |
1916 | int nsyms = 0; | |
1917 | int done = 0; | |
1918 | struct pending **symlist; | |
1919 | struct coff_symbol member_sym; | |
1920 | register struct coff_symbol *ms = &member_sym; | |
1921 | SYMENT sub_sym; | |
1922 | AUXENT sub_aux; | |
1923 | struct pending *osyms, *syms; | |
1924 | register int n; | |
1925 | char *name; | |
1926 | #ifdef NAMES_HAVE_UNDERSCORE | |
1927 | int offset = 1; | |
1928 | #else | |
1929 | int offset = 0; | |
1930 | #endif | |
1931 | ||
1932 | type = coff_alloc_type (index); | |
1933 | if (within_function) | |
1934 | symlist = &local_symbols; | |
1935 | else | |
1936 | symlist = &file_symbols; | |
1937 | osyms = *symlist; | |
1938 | ||
1939 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
1940 | { | |
1941 | read_one_sym (ms, &sub_sym, &sub_aux); | |
1942 | name = ms->c_name; | |
1943 | name = (name[0] == '_' ? name + offset : name); | |
1944 | ||
1945 | switch (ms->c_sclass) | |
1946 | { | |
1947 | case C_MOE: | |
1948 | sym = (struct symbol *) xmalloc (sizeof (struct symbol)); | |
1949 | bzero (sym, sizeof (struct symbol)); | |
1950 | ||
1951 | SYMBOL_NAME (sym) = savestring (name, strlen (name)); | |
1952 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1953 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1954 | SYMBOL_VALUE (sym) = ms->c_value; | |
1955 | add_symbol_to_list (sym, symlist); | |
1956 | nsyms++; | |
1957 | break; | |
1958 | ||
1959 | case C_EOS: | |
1960 | /* Sometimes the linker (on 386/ix 2.0.2 at least) screws | |
1961 | up the count of how many symbols to read. So stop | |
1962 | on .eos. */ | |
1963 | done = 1; | |
1964 | break; | |
1965 | } | |
1966 | } | |
1967 | ||
1968 | /* Now fill in the fields of the type-structure. */ | |
1969 | ||
e1ce8aa5 | 1970 | /* FIXME: Should be sizeof (int) on target, not host. */ |
bd5635a1 RP |
1971 | TYPE_LENGTH (type) = sizeof (int); |
1972 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
1973 | TYPE_NFIELDS (type) = nsyms; | |
1974 | TYPE_FIELDS (type) = (struct field *) | |
1975 | obstack_alloc (symbol_obstack, sizeof (struct field) * nsyms); | |
1976 | ||
1977 | /* Find the symbols for the values and put them into the type. | |
1978 | The symbols can be found in the symlist that we put them on | |
1979 | to cause them to be defined. osyms contains the old value | |
1980 | of that symlist; everything up to there was defined by us. */ | |
1981 | ||
1982 | for (syms = *symlist, n = nsyms; syms != osyms; syms = syms->next) | |
1983 | { | |
1984 | SYMBOL_TYPE (syms->symbol) = type; | |
1985 | TYPE_FIELD_NAME (type, --n) = SYMBOL_NAME (syms->symbol); | |
1986 | TYPE_FIELD_VALUE (type, n) = 0; | |
1987 | TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (syms->symbol); | |
1988 | TYPE_FIELD_BITSIZE (type, n) = 0; | |
1989 | } | |
1990 | return type; | |
1991 | } | |
1992 | ||
1993 | /* Register our ability to parse symbols for coff BFD files */ | |
1994 | ||
1995 | static struct sym_fns coff_sym_fns = | |
1996 | { | |
1997 | "coff", 4, | |
1998 | coff_new_init, coff_symfile_init, | |
1999 | coff_symfile_read, coff_symfile_discard | |
2000 | }; | |
2001 | ||
2002 | void | |
2003 | _initialize_coffread () | |
2004 | { | |
2005 | add_symtab_fns(&coff_sym_fns); | |
2006 | } |