Commit | Line | Data |
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bd5635a1 | 1 | /* Read coff symbol tables and convert to internal format, for GDB. |
d8ce1326 | 2 | Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu). |
bd5635a1 RP |
3 | Copyright (C) 1987-1991 Free Software Foundation, Inc. |
4 | ||
5 | This file is part of GDB. | |
6 | ||
99a7de40 | 7 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 8 | it under the terms of the GNU General Public License as published by |
99a7de40 JG |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | (at your option) any later version. | |
bd5635a1 | 11 | |
99a7de40 | 12 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
99a7de40 JG |
18 | along with this program; if not, write to the Free Software |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
bd5635a1 RP |
20 | \f |
21 | #include <stdio.h> | |
22 | #include "defs.h" | |
23 | #include "param.h" | |
24 | #include "symtab.h" | |
25 | #include "breakpoint.h" | |
26 | #include "bfd.h" | |
bd5635a1 RP |
27 | #include "symfile.h" |
28 | ||
8aa13b87 | 29 | #if defined (TDESC) |
d8ce1326 JG |
30 | /* Need to get C_VERSION and friends. FIXME, should be in internalcoff.h */ |
31 | #include "m88k-bcs.h" | |
8aa13b87 JK |
32 | #endif /* not TDESC */ |
33 | ||
bd5635a1 RP |
34 | #include <obstack.h> |
35 | #include <string.h> | |
36 | ||
6988f5c0 | 37 | #include "internalcoff.h" /* Internal format of COFF symbols in BFD */ |
63989338 JG |
38 | #include "libcoff.h" /* FIXME secret internal data from BFD */ |
39 | ||
bd5635a1 RP |
40 | static void add_symbol_to_list (); |
41 | static void read_coff_symtab (); | |
42 | static void patch_opaque_types (); | |
43 | static struct type *decode_function_type (); | |
44 | static struct type *decode_type (); | |
45 | static struct type *decode_base_type (); | |
46 | static struct type *read_enum_type (); | |
47 | static struct type *read_struct_type (); | |
48 | static void finish_block (); | |
49 | static struct blockvector *make_blockvector (); | |
50 | static struct symbol *process_coff_symbol (); | |
51 | static int init_stringtab (); | |
52 | static void free_stringtab (); | |
53 | static char *getfilename (); | |
54 | static char *getsymname (); | |
55 | static int init_lineno (); | |
56 | static void enter_linenos (); | |
57 | static void read_one_sym (); | |
58 | ||
59 | extern int fclose (); | |
60 | extern void free_all_symtabs (); | |
61 | extern void free_all_psymtabs (); | |
62 | ||
8714ff35 JK |
63 | /* To be an sdb debug type, type must have at least a basic or primary |
64 | derived type. Using this rather than checking against T_NULL is | |
ab8f22a9 JK |
65 | said to prevent core dumps if we try to operate on Michael Bloom |
66 | dbx-in-coff file. */ | |
8714ff35 JK |
67 | |
68 | #define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK)) | |
69 | ||
d8ce1326 JG |
70 | /* |
71 | * Convert from an sdb register number to an internal gdb register number. | |
72 | * This should be defined in tm.h, if REGISTER_NAMES is not set up | |
73 | * to map one to one onto the sdb register numbers. | |
74 | */ | |
75 | #ifndef SDB_REG_TO_REGNUM | |
76 | # define SDB_REG_TO_REGNUM(value) (value) | |
77 | #endif | |
78 | ||
bd5635a1 RP |
79 | /* Name of source file whose symbol data we are now processing. |
80 | This comes from a symbol named ".file". */ | |
81 | ||
82 | static char *last_source_file; | |
83 | ||
84 | /* Core address of start and end of text of current source file. | |
85 | This comes from a ".text" symbol where x_nlinno > 0. */ | |
86 | ||
87 | static CORE_ADDR cur_src_start_addr; | |
88 | static CORE_ADDR cur_src_end_addr; | |
89 | ||
90 | /* Core address of the end of the first object file. */ | |
91 | static CORE_ADDR first_object_file_end; | |
92 | ||
bd5635a1 RP |
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 | ||
d8ce1326 JG |
131 | /* Pointers to scratch storage, used for reading raw symbols and auxents. */ |
132 | ||
133 | static char *temp_sym; | |
134 | static char *temp_aux; | |
135 | ||
136 | /* Local variables that hold the shift and mask values for the | |
137 | COFF file that we are currently reading. These come back to us | |
138 | from BFD, and are referenced by their macro names, as well as | |
139 | internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF | |
140 | macros from ../internalcoff.h . */ | |
141 | ||
142 | static unsigned local_n_btmask; | |
143 | static unsigned local_n_btshft; | |
144 | static unsigned local_n_tmask; | |
145 | static unsigned local_n_tshift; | |
146 | ||
147 | #define N_BTMASK local_n_btmask | |
148 | #define N_BTSHFT local_n_btshft | |
149 | #define N_TMASK local_n_tmask | |
150 | #define N_TSHIFT local_n_tshift | |
151 | ||
152 | /* Local variables that hold the sizes in the file of various COFF structures. | |
153 | (We only need to know this to read them from the file -- BFD will then | |
154 | translate the data in them, into `internal_xxx' structs in the right | |
155 | byte order, alignment, etc.) */ | |
156 | ||
157 | static unsigned local_linesz; | |
158 | static unsigned local_symesz; | |
159 | static unsigned local_auxesz; | |
160 | ||
161 | ||
bd5635a1 | 162 | #ifdef TDESC |
8aa13b87 | 163 | #include "tdesc.h" |
bd5635a1 RP |
164 | #define SEM |
165 | int int_sem_val = 's' << 24 | 'e' << 16 | 'm' << 8 | '.'; | |
166 | int temp_sem_val; | |
167 | int last_coffsem = 2; | |
8aa13b87 JK |
168 | #if 0 |
169 | /* This isn't used currently. */ | |
bd5635a1 | 170 | int last_coffsyn = 0; |
8aa13b87 | 171 | #endif |
bd5635a1 | 172 | int debug_info = 0; /*used by tdesc */ |
8aa13b87 | 173 | extern dc_dcontext_t tdesc_handle; |
bd5635a1 RP |
174 | extern int safe_to_init_tdesc_context; |
175 | #endif | |
176 | ||
177 | /* Chain of typedefs of pointers to empty struct/union types. | |
178 | They are chained thru the SYMBOL_VALUE_CHAIN. */ | |
179 | ||
180 | #define HASHSIZE 127 | |
181 | static struct symbol *opaque_type_chain[HASHSIZE]; | |
182 | ||
183 | /* Record the symbols defined for each context in a list. | |
184 | We don't create a struct block for the context until we | |
185 | know how long to make it. */ | |
186 | ||
187 | struct pending | |
188 | { | |
189 | struct pending *next; | |
190 | struct symbol *symbol; | |
191 | }; | |
192 | ||
193 | /* Here are the three lists that symbols are put on. */ | |
194 | ||
195 | struct pending *file_symbols; /* static at top level, and types */ | |
196 | ||
197 | struct pending *global_symbols; /* global functions and variables */ | |
198 | ||
199 | struct pending *local_symbols; /* everything local to lexical context */ | |
200 | ||
201 | /* List of unclosed lexical contexts | |
202 | (that will become blocks, eventually). */ | |
203 | ||
204 | struct context_stack | |
205 | { | |
206 | struct context_stack *next; | |
207 | struct pending *locals; | |
208 | struct pending_block *old_blocks; | |
209 | struct symbol *name; | |
210 | CORE_ADDR start_addr; | |
211 | int depth; | |
212 | }; | |
213 | ||
214 | struct context_stack *context_stack; | |
215 | ||
216 | /* Nonzero if within a function (so symbols should be local, | |
217 | if nothing says specifically). */ | |
218 | ||
219 | int within_function; | |
220 | ||
d8ce1326 JG |
221 | #if 0 |
222 | /* The type of the function we are currently reading in. This is | |
223 | used by define_symbol to record the type of arguments to a function. */ | |
224 | ||
225 | struct type *in_function_type; | |
226 | #endif | |
227 | ||
bd5635a1 RP |
228 | /* List of blocks already made (lexical contexts already closed). |
229 | This is used at the end to make the blockvector. */ | |
230 | ||
231 | struct pending_block | |
232 | { | |
233 | struct pending_block *next; | |
234 | struct block *block; | |
235 | }; | |
236 | ||
237 | struct pending_block *pending_blocks; | |
238 | ||
239 | extern CORE_ADDR startup_file_start; /* From blockframe.c */ | |
240 | extern CORE_ADDR startup_file_end; /* From blockframe.c */ | |
241 | ||
242 | /* Complaints about various problems in the file being read */ | |
243 | ||
244 | struct complaint ef_complaint = | |
245 | {"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0}; | |
246 | ||
63989338 JG |
247 | struct complaint lineno_complaint = |
248 | {"Line number pointer %d lower than start of line numbers", 0, 0}; | |
249 | ||
bd5635a1 RP |
250 | \f |
251 | /* Look up a coff type-number index. Return the address of the slot | |
252 | where the type for that index is stored. | |
253 | The type-number is in INDEX. | |
254 | ||
255 | This can be used for finding the type associated with that index | |
256 | or for associating a new type with the index. */ | |
257 | ||
258 | static struct type ** | |
259 | coff_lookup_type (index) | |
260 | register int index; | |
261 | { | |
262 | if (index >= type_vector_length) | |
263 | { | |
264 | int old_vector_length = type_vector_length; | |
265 | ||
266 | type_vector_length *= 2; | |
267 | if (type_vector_length < index) { | |
268 | type_vector_length = index * 2; | |
269 | } | |
270 | type_vector = (struct typevector *) | |
271 | xrealloc (type_vector, sizeof (struct typevector) | |
272 | + type_vector_length * sizeof (struct type *)); | |
273 | bzero (&type_vector->type[ old_vector_length ], | |
274 | (type_vector_length - old_vector_length) * sizeof(struct type *)); | |
275 | } | |
276 | return &type_vector->type[index]; | |
277 | } | |
278 | ||
279 | /* Make sure there is a type allocated for type number index | |
280 | and return the type object. | |
281 | This can create an empty (zeroed) type object. */ | |
282 | ||
283 | static struct type * | |
284 | coff_alloc_type (index) | |
285 | int index; | |
286 | { | |
287 | register struct type **type_addr = coff_lookup_type (index); | |
288 | register struct type *type = *type_addr; | |
289 | ||
290 | /* If we are referring to a type not known at all yet, | |
291 | allocate an empty type for it. | |
292 | We will fill it in later if we find out how. */ | |
293 | if (type == 0) | |
294 | { | |
295 | type = (struct type *) obstack_alloc (symbol_obstack, | |
296 | sizeof (struct type)); | |
297 | bzero (type, sizeof (struct type)); | |
298 | *type_addr = type; | |
299 | } | |
300 | return type; | |
301 | } | |
302 | \f | |
303 | /* maintain the lists of symbols and blocks */ | |
304 | ||
305 | /* Add a symbol to one of the lists of symbols. */ | |
306 | static void | |
307 | add_symbol_to_list (symbol, listhead) | |
308 | struct symbol *symbol; | |
309 | struct pending **listhead; | |
310 | { | |
311 | register struct pending *link | |
312 | = (struct pending *) xmalloc (sizeof (struct pending)); | |
313 | ||
314 | link->next = *listhead; | |
315 | link->symbol = symbol; | |
316 | *listhead = link; | |
317 | } | |
318 | ||
319 | /* Take one of the lists of symbols and make a block from it. | |
320 | Put the block on the list of pending blocks. */ | |
321 | ||
322 | static void | |
323 | finish_block (symbol, listhead, old_blocks, start, end) | |
324 | struct symbol *symbol; | |
325 | struct pending **listhead; | |
326 | struct pending_block *old_blocks; | |
327 | CORE_ADDR start, end; | |
328 | { | |
329 | register struct pending *next, *next1; | |
330 | register struct block *block; | |
331 | register struct pending_block *pblock; | |
332 | struct pending_block *opblock; | |
333 | register int i; | |
334 | ||
335 | /* Count the length of the list of symbols. */ | |
336 | ||
337 | for (next = *listhead, i = 0; next; next = next->next, i++); | |
338 | ||
339 | block = (struct block *) | |
340 | obstack_alloc (symbol_obstack, sizeof (struct block) + (i - 1) * sizeof (struct symbol *)); | |
341 | ||
342 | /* Copy the symbols into the block. */ | |
343 | ||
344 | BLOCK_NSYMS (block) = i; | |
345 | for (next = *listhead; next; next = next->next) | |
346 | BLOCK_SYM (block, --i) = next->symbol; | |
347 | ||
348 | BLOCK_START (block) = start; | |
349 | BLOCK_END (block) = end; | |
350 | BLOCK_SUPERBLOCK (block) = 0; /* Filled in when containing block is made */ | |
351 | ||
352 | /* Put the block in as the value of the symbol that names it. */ | |
353 | ||
354 | if (symbol) | |
355 | { | |
356 | SYMBOL_BLOCK_VALUE (symbol) = block; | |
357 | BLOCK_FUNCTION (block) = symbol; | |
358 | } | |
359 | else | |
360 | BLOCK_FUNCTION (block) = 0; | |
361 | ||
362 | /* Now free the links of the list, and empty the list. */ | |
363 | ||
364 | for (next = *listhead; next; next = next1) | |
365 | { | |
366 | next1 = next->next; | |
367 | free (next); | |
368 | } | |
369 | *listhead = 0; | |
370 | ||
371 | /* Install this block as the superblock | |
372 | of all blocks made since the start of this scope | |
373 | that don't have superblocks yet. */ | |
374 | ||
375 | opblock = 0; | |
376 | for (pblock = pending_blocks; pblock != old_blocks; pblock = pblock->next) | |
377 | { | |
378 | if (BLOCK_SUPERBLOCK (pblock->block) == 0) | |
379 | BLOCK_SUPERBLOCK (pblock->block) = block; | |
380 | opblock = pblock; | |
381 | } | |
382 | ||
383 | /* Record this block on the list of all blocks in the file. | |
384 | Put it after opblock, or at the beginning if opblock is 0. | |
385 | This puts the block in the list after all its subblocks. */ | |
386 | ||
387 | pblock = (struct pending_block *) xmalloc (sizeof (struct pending_block)); | |
388 | pblock->block = block; | |
389 | if (opblock) | |
390 | { | |
391 | pblock->next = opblock->next; | |
392 | opblock->next = pblock; | |
393 | } | |
394 | else | |
395 | { | |
396 | pblock->next = pending_blocks; | |
397 | pending_blocks = pblock; | |
398 | } | |
399 | } | |
400 | ||
401 | static struct blockvector * | |
402 | make_blockvector () | |
403 | { | |
404 | register struct pending_block *next, *next1; | |
405 | register struct blockvector *blockvector; | |
406 | register int i; | |
407 | ||
408 | /* Count the length of the list of blocks. */ | |
409 | ||
410 | for (next = pending_blocks, i = 0; next; next = next->next, i++); | |
411 | ||
412 | blockvector = (struct blockvector *) | |
413 | obstack_alloc (symbol_obstack, sizeof (struct blockvector) + (i - 1) * sizeof (struct block *)); | |
414 | ||
415 | /* Copy the blocks into the blockvector. | |
416 | This is done in reverse order, which happens to put | |
417 | the blocks into the proper order (ascending starting address). | |
418 | finish_block has hair to insert each block into the list | |
419 | after its subblocks in order to make sure this is true. */ | |
420 | ||
421 | BLOCKVECTOR_NBLOCKS (blockvector) = i; | |
422 | for (next = pending_blocks; next; next = next->next) | |
423 | BLOCKVECTOR_BLOCK (blockvector, --i) = next->block; | |
424 | ||
425 | /* Now free the links of the list, and empty the list. */ | |
426 | ||
427 | for (next = pending_blocks; next; next = next1) | |
428 | { | |
429 | next1 = next->next; | |
430 | free (next); | |
431 | } | |
432 | pending_blocks = 0; | |
433 | ||
434 | return blockvector; | |
435 | } | |
436 | ||
437 | /* Manage the vector of line numbers. */ | |
438 | ||
e1ce8aa5 | 439 | static void |
bd5635a1 RP |
440 | record_line (line, pc) |
441 | int line; | |
442 | CORE_ADDR pc; | |
443 | { | |
444 | struct linetable_entry *e; | |
445 | /* Make sure line vector is big enough. */ | |
446 | ||
447 | if (line_vector_index + 2 >= line_vector_length) | |
448 | { | |
449 | line_vector_length *= 2; | |
450 | line_vector = (struct linetable *) | |
451 | xrealloc (line_vector, sizeof (struct linetable) | |
452 | + (line_vector_length | |
453 | * sizeof (struct linetable_entry))); | |
454 | } | |
455 | ||
456 | e = line_vector->item + line_vector_index++; | |
457 | e->line = line; e->pc = pc; | |
458 | } | |
459 | \f | |
460 | /* Start a new symtab for a new source file. | |
461 | This is called when a COFF ".file" symbol is seen; | |
462 | it indicates the start of data for one original source file. */ | |
463 | ||
464 | static void | |
465 | start_symtab () | |
466 | { | |
467 | file_symbols = 0; | |
468 | global_symbols = 0; | |
469 | context_stack = 0; | |
470 | within_function = 0; | |
471 | last_source_file = 0; | |
472 | #ifdef TDESC | |
473 | last_coffsem = 2; | |
8aa13b87 JK |
474 | #if 0 |
475 | /* This isn't used currently. */ | |
bd5635a1 | 476 | last_coffsyn = 0; |
8aa13b87 | 477 | #endif |
bd5635a1 RP |
478 | #endif |
479 | ||
cadbb07a | 480 | /* Initialize the source file line number information for this file. */ |
bd5635a1 | 481 | |
cadbb07a JG |
482 | if (line_vector) /* Unlikely, but maybe possible? */ |
483 | free (line_vector); | |
bd5635a1 RP |
484 | line_vector_index = 0; |
485 | line_vector_length = 1000; | |
486 | prev_line_number = -2; /* Force first line number to be explicit */ | |
487 | line_vector = (struct linetable *) | |
488 | xmalloc (sizeof (struct linetable) | |
489 | + line_vector_length * sizeof (struct linetable_entry)); | |
490 | } | |
491 | ||
492 | /* Save the vital information from when starting to read a file, | |
493 | for use when closing off the current file. | |
494 | NAME is the file name the symbols came from, START_ADDR is the first | |
495 | text address for the file, and SIZE is the number of bytes of text. */ | |
496 | ||
497 | static void | |
498 | complete_symtab (name, start_addr, size) | |
499 | char *name; | |
500 | CORE_ADDR start_addr; | |
501 | unsigned int size; | |
502 | { | |
503 | last_source_file = savestring (name, strlen (name)); | |
504 | cur_src_start_addr = start_addr; | |
505 | cur_src_end_addr = start_addr + size; | |
506 | ||
507 | if (entry_point < cur_src_end_addr | |
508 | && entry_point >= cur_src_start_addr) | |
509 | { | |
510 | startup_file_start = cur_src_start_addr; | |
511 | startup_file_end = cur_src_end_addr; | |
512 | } | |
513 | } | |
514 | ||
515 | /* Finish the symbol definitions for one main source file, | |
516 | close off all the lexical contexts for that file | |
517 | (creating struct block's for them), then make the | |
518 | struct symtab for that file and put it in the list of all such. */ | |
519 | ||
520 | static void | |
521 | end_symtab () | |
522 | { | |
523 | register struct symtab *symtab; | |
524 | register struct context_stack *cstk; | |
525 | register struct blockvector *blockvector; | |
526 | register struct linetable *lv; | |
527 | ||
528 | /* Finish the lexical context of the last function in the file. */ | |
529 | ||
530 | if (context_stack) | |
531 | { | |
532 | cstk = context_stack; | |
533 | context_stack = 0; | |
534 | /* Make a block for the local symbols within. */ | |
535 | finish_block (cstk->name, &local_symbols, cstk->old_blocks, | |
536 | cstk->start_addr, cur_src_end_addr); | |
537 | free (cstk); | |
538 | } | |
539 | ||
540 | /* Ignore a file that has no functions with real debugging info. */ | |
541 | if (pending_blocks == 0 && file_symbols == 0 && global_symbols == 0) | |
542 | { | |
543 | free (line_vector); | |
544 | line_vector = 0; | |
545 | line_vector_length = -1; | |
546 | last_source_file = 0; | |
547 | return; | |
548 | } | |
549 | ||
a6e2b424 JG |
550 | /* Create the two top-level blocks for this file (STATIC_BLOCK and |
551 | GLOBAL_BLOCK). */ | |
bd5635a1 RP |
552 | finish_block (0, &file_symbols, 0, cur_src_start_addr, cur_src_end_addr); |
553 | finish_block (0, &global_symbols, 0, cur_src_start_addr, cur_src_end_addr); | |
554 | ||
555 | /* Create the blockvector that points to all the file's blocks. */ | |
556 | blockvector = make_blockvector (); | |
557 | ||
558 | /* Now create the symtab object for this source file. */ | |
d8ce1326 | 559 | symtab = allocate_symtab (last_source_file); |
bd5635a1 RP |
560 | |
561 | /* Fill in its components. */ | |
562 | symtab->blockvector = blockvector; | |
563 | symtab->free_code = free_linetable; | |
d8ce1326 | 564 | symtab->free_ptr = 0; |
bd5635a1 | 565 | symtab->filename = last_source_file; |
b203fc18 | 566 | symtab->dirname = NULL; |
bd5635a1 RP |
567 | lv = line_vector; |
568 | lv->nitems = line_vector_index; | |
569 | symtab->linetable = (struct linetable *) | |
570 | xrealloc (lv, (sizeof (struct linetable) | |
571 | + lv->nitems * sizeof (struct linetable_entry))); | |
b203fc18 | 572 | |
bd5635a1 RP |
573 | #ifdef TDESC |
574 | symtab->coffsem = last_coffsem; | |
8aa13b87 JK |
575 | #if 0 |
576 | /* This isn't used currently. Besides, if this is really about "syntax", | |
577 | it shouldn't need to stick around past symbol read-in time. */ | |
bd5635a1 | 578 | symtab->coffsyn = last_coffsyn; |
8aa13b87 | 579 | #endif |
bd5635a1 RP |
580 | #endif |
581 | ||
a6e2b424 JG |
582 | free_named_symtabs (symtab->filename); |
583 | ||
bd5635a1 RP |
584 | /* Link the new symtab into the list of such. */ |
585 | symtab->next = symtab_list; | |
586 | symtab_list = symtab; | |
587 | ||
588 | /* Reinitialize for beginning of new file. */ | |
589 | line_vector = 0; | |
590 | line_vector_length = -1; | |
591 | last_source_file = 0; | |
592 | } | |
593 | \f | |
594 | static void | |
595 | record_misc_function (name, address) | |
596 | char *name; | |
597 | CORE_ADDR address; | |
598 | { | |
599 | #ifdef TDESC | |
600 | /* We don't want TDESC entry points on the misc_function_vector */ | |
601 | if (name[0] == '@') return; | |
602 | #endif | |
603 | /* mf_text isn't true, but apparently COFF doesn't tell us what it really | |
604 | is, so this guess is more useful than mf_unknown. */ | |
605 | prim_record_misc_function (savestring (name, strlen (name)), | |
606 | address, | |
607 | (int)mf_text); | |
608 | } | |
609 | \f | |
610 | /* coff_symfile_init () | |
611 | is the coff-specific initialization routine for reading symbols. | |
612 | It is passed a struct sym_fns which contains, among other things, | |
613 | the BFD for the file whose symbols are being read, and a slot for | |
614 | a pointer to "private data" which we fill with cookies and other | |
615 | treats for coff_symfile_read (). | |
616 | ||
617 | We will only be called if this is a COFF or COFF-like file. | |
618 | BFD handles figuring out the format of the file, and code in symtab.c | |
619 | uses BFD's determination to vector to us. | |
620 | ||
621 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ | |
622 | ||
623 | struct coff_symfile_info { | |
624 | file_ptr min_lineno_offset; /* Where in file lowest line#s are */ | |
625 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ | |
626 | }; | |
627 | ||
d8ce1326 JG |
628 | static int text_bfd_scnum; |
629 | ||
9bba3334 | 630 | static void |
bd5635a1 RP |
631 | coff_symfile_init (sf) |
632 | struct sym_fns *sf; | |
633 | { | |
d8ce1326 | 634 | asection *section; |
bd5635a1 RP |
635 | bfd *abfd = sf->sym_bfd; |
636 | ||
637 | /* Allocate struct to keep track of the symfile */ | |
638 | /* FIXME memory leak */ | |
639 | sf->sym_private = xmalloc (sizeof (struct coff_symfile_info)); | |
640 | ||
641 | #if defined (TDESC) | |
642 | safe_to_init_tdesc_context = 0; | |
643 | #endif | |
644 | ||
645 | /* Save startup file's range of PC addresses to help blockframe.c | |
646 | decide where the bottom of the stack is. */ | |
647 | if (bfd_get_file_flags (abfd) & EXEC_P) | |
648 | { | |
649 | /* Executable file -- record its entry point so we'll recognize | |
650 | the startup file because it contains the entry point. */ | |
651 | entry_point = bfd_get_start_address (abfd); | |
652 | } | |
653 | else | |
654 | { | |
655 | /* Examination of non-executable.o files. Short-circuit this stuff. */ | |
656 | /* ~0 will not be in any file, we hope. */ | |
657 | entry_point = ~0; | |
658 | /* set the startup file to be an empty range. */ | |
659 | startup_file_start = 0; | |
660 | startup_file_end = 0; | |
661 | } | |
d8ce1326 JG |
662 | /* Save the section number for the text section */ |
663 | if (section = bfd_get_section_by_name(abfd,".text")) | |
664 | text_bfd_scnum = section->index; | |
665 | else | |
666 | text_bfd_scnum = -1; | |
bd5635a1 RP |
667 | } |
668 | ||
669 | /* This function is called for every section; it finds the outer limits | |
670 | of the line table (minimum and maximum file offset) so that the | |
671 | mainline code can read the whole thing for efficiency. */ | |
672 | ||
e1ce8aa5 | 673 | /* ARGSUSED */ |
bd5635a1 RP |
674 | static void |
675 | find_linenos (abfd, asect, vpinfo) | |
676 | bfd *abfd; | |
677 | sec_ptr asect; | |
678 | void *vpinfo; | |
679 | { | |
680 | struct coff_symfile_info *info; | |
681 | int size, count; | |
682 | file_ptr offset, maxoff; | |
683 | ||
684 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
685 | count = asect->lineno_count; | |
686 | /* End of warning */ | |
687 | ||
688 | if (count == 0) | |
689 | return; | |
d8ce1326 | 690 | size = count * local_linesz; |
bd5635a1 RP |
691 | |
692 | info = (struct coff_symfile_info *)vpinfo; | |
693 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
694 | offset = asect->line_filepos; | |
695 | /* End of warning */ | |
696 | ||
697 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) | |
698 | info->min_lineno_offset = offset; | |
699 | ||
700 | maxoff = offset + size; | |
701 | if (maxoff > info->max_lineno_offset) | |
702 | info->max_lineno_offset = maxoff; | |
8aa13b87 JK |
703 | #ifdef TDESC |
704 | /* While we're at it, find the debug_info. It's in the s_relptr | |
705 | (or, in BFD-speak, rel_filepos) of the text segment section header. */ | |
706 | if (strcmp (bfd_section_name (abfd, asect), ".text") == 0) | |
707 | { | |
708 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
709 | debug_info = asect->rel_filepos; | |
710 | /* End of warning */ | |
711 | if (tdesc_handle) | |
712 | { | |
713 | dc_terminate (tdesc_handle); | |
714 | tdesc_handle = 0; | |
715 | } | |
716 | } | |
717 | #endif /* TDESC */ | |
bd5635a1 RP |
718 | } |
719 | ||
720 | ||
e1ce8aa5 JK |
721 | /* The BFD for this file -- only good while we're actively reading |
722 | symbols into a psymtab or a symtab. */ | |
723 | ||
724 | static bfd *symfile_bfd; | |
725 | ||
bd5635a1 RP |
726 | /* Read a symbol file, after initialization by coff_symfile_init. */ |
727 | /* FIXME! Addr and Mainline are not used yet -- this will not work for | |
728 | shared libraries or add_file! */ | |
729 | ||
61a7292f | 730 | /* ARGSUSED */ |
9bba3334 | 731 | static void |
bd5635a1 RP |
732 | coff_symfile_read (sf, addr, mainline) |
733 | struct sym_fns *sf; | |
734 | CORE_ADDR addr; | |
735 | int mainline; | |
736 | { | |
737 | struct coff_symfile_info *info = (struct coff_symfile_info *)sf->sym_private; | |
738 | bfd *abfd = sf->sym_bfd; | |
d8ce1326 | 739 | coff_data_type *cdata = coff_data (abfd); |
bd5635a1 RP |
740 | char *name = bfd_get_filename (abfd); |
741 | int desc; | |
742 | register int val; | |
743 | int num_symbols; | |
744 | int symtab_offset; | |
745 | int stringtab_offset; | |
746 | ||
747 | symfile_bfd = abfd; /* Kludge for swap routines */ | |
748 | ||
749 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
d8ce1326 | 750 | desc = fileno ((FILE *)(abfd->iostream)); /* File descriptor */ |
bd5635a1 | 751 | num_symbols = bfd_get_symcount (abfd); /* How many syms */ |
d8ce1326 JG |
752 | symtab_offset = cdata->sym_filepos; /* Symbol table file offset */ |
753 | stringtab_offset = symtab_offset + /* String table file offset */ | |
754 | num_symbols * cdata->local_symesz; | |
755 | ||
756 | /* Set a few file-statics that give us specific information about | |
757 | the particular COFF file format we're reading. */ | |
758 | local_linesz = cdata->local_linesz; | |
759 | local_n_btmask = cdata->local_n_btmask; | |
760 | local_n_btshft = cdata->local_n_btshft; | |
761 | local_n_tmask = cdata->local_n_tmask; | |
762 | local_n_tshift = cdata->local_n_tshift; | |
763 | local_linesz = cdata->local_linesz; | |
764 | local_symesz = cdata->local_symesz; | |
765 | local_auxesz = cdata->local_auxesz; | |
766 | ||
767 | /* Allocate space for raw symbol and aux entries, based on their | |
768 | space requirements as reported by BFD. */ | |
769 | temp_sym = (char *) xmalloc | |
770 | (cdata->local_symesz + cdata->local_auxesz); | |
771 | temp_aux = temp_sym + cdata->local_symesz; | |
772 | make_cleanup (free_current_contents, &temp_sym); | |
bd5635a1 RP |
773 | /* End of warning */ |
774 | ||
bd5635a1 RP |
775 | /* Read the line number table, all at once. */ |
776 | info->min_lineno_offset = 0; | |
777 | info->max_lineno_offset = 0; | |
778 | bfd_map_over_sections (abfd, find_linenos, info); | |
779 | ||
780 | val = init_lineno (desc, info->min_lineno_offset, | |
781 | info->max_lineno_offset - info->min_lineno_offset); | |
782 | if (val < 0) | |
783 | error ("\"%s\": error reading line numbers\n", name); | |
784 | ||
785 | /* Now read the string table, all at once. */ | |
786 | ||
787 | val = init_stringtab (desc, stringtab_offset); | |
788 | if (val < 0) | |
789 | { | |
790 | free_all_symtabs (); /* FIXME blows whole symtab */ | |
791 | printf ("\"%s\": can't get string table", name); | |
792 | fflush (stdout); | |
793 | return; | |
794 | } | |
795 | make_cleanup (free_stringtab, 0); | |
796 | ||
797 | /* Position to read the symbol table. Do not read it all at once. */ | |
798 | val = lseek (desc, (long)symtab_offset, 0); | |
799 | if (val < 0) | |
800 | perror_with_name (name); | |
801 | ||
802 | init_misc_bunches (); | |
803 | make_cleanup (discard_misc_bunches, 0); | |
804 | ||
805 | /* Now that the executable file is positioned at symbol table, | |
806 | process it and define symbols accordingly. */ | |
807 | ||
808 | read_coff_symtab (desc, num_symbols); | |
809 | ||
810 | patch_opaque_types (); | |
811 | ||
812 | /* Sort symbols alphabetically within each block. */ | |
813 | ||
814 | sort_all_symtab_syms (); | |
815 | ||
816 | /* Go over the misc symbol bunches and install them in vector. */ | |
817 | ||
61a7292f | 818 | condense_misc_bunches (!mainline); |
bd5635a1 RP |
819 | |
820 | /* Make a default for file to list. */ | |
821 | ||
822 | select_source_symtab (0); /* FIXME, this might be too slow, see dbxread */ | |
823 | } | |
824 | ||
9bba3334 | 825 | static void |
bd5635a1 RP |
826 | coff_new_init () |
827 | { | |
828 | /* There seems to be nothing to do except free_all_symtabs and set | |
829 | symfile to zero, which is done by our caller. */ | |
830 | } | |
831 | \f | |
832 | /* Simplified internal version of coff symbol table information */ | |
833 | ||
834 | struct coff_symbol { | |
835 | char *c_name; | |
836 | int c_symnum; /* symbol number of this entry */ | |
837 | int c_nsyms; /* 1 if syment only, 2 if syment + auxent, etc */ | |
838 | long c_value; | |
839 | int c_sclass; | |
840 | int c_secnum; | |
841 | unsigned int c_type; | |
842 | }; | |
843 | ||
844 | /* Given pointers to a symbol table in coff style exec file, | |
845 | analyze them and create struct symtab's describing the symbols. | |
846 | NSYMS is the number of symbols in the symbol table. | |
847 | We read them one at a time using read_one_sym (). */ | |
848 | ||
849 | static void | |
850 | read_coff_symtab (desc, nsyms) | |
851 | int desc; | |
852 | int nsyms; | |
853 | { | |
854 | int newfd; /* Avoid multiple closes on same desc */ | |
855 | FILE *stream; | |
856 | register struct context_stack *new; | |
857 | struct coff_symbol coff_symbol; | |
858 | register struct coff_symbol *cs = &coff_symbol; | |
dcc35536 JG |
859 | static struct internal_syment main_sym; |
860 | static union internal_auxent main_aux; | |
bd5635a1 | 861 | struct coff_symbol fcn_cs_saved; |
dcc35536 JG |
862 | static struct internal_syment fcn_sym_saved; |
863 | static union internal_auxent fcn_aux_saved; | |
bd5635a1 RP |
864 | |
865 | /* A .file is open. */ | |
866 | int in_source_file = 0; | |
867 | int num_object_files = 0; | |
868 | int next_file_symnum = -1; | |
869 | ||
870 | /* Name of the current file. */ | |
871 | char *filestring = ""; | |
872 | int depth; | |
873 | int fcn_first_line; | |
874 | int fcn_last_line; | |
875 | int fcn_start_addr; | |
876 | long fcn_line_ptr; | |
877 | struct cleanup *old_chain; | |
878 | ||
879 | ||
880 | newfd = dup (desc); | |
881 | if (newfd == -1) | |
882 | fatal ("Too many open files"); | |
883 | stream = fdopen (newfd, "r"); | |
884 | ||
885 | old_chain = make_cleanup (free_all_symtabs, 0); | |
886 | make_cleanup (fclose, stream); | |
887 | nlist_stream_global = stream; | |
888 | nlist_nsyms_global = nsyms; | |
889 | last_source_file = 0; | |
890 | bzero (opaque_type_chain, sizeof opaque_type_chain); | |
891 | ||
cadbb07a JG |
892 | if (type_vector) /* Get rid of previous one */ |
893 | free (type_vector); | |
bd5635a1 RP |
894 | type_vector_length = 160; |
895 | type_vector = (struct typevector *) | |
896 | xmalloc (sizeof (struct typevector) | |
897 | + type_vector_length * sizeof (struct type *)); | |
898 | bzero (type_vector->type, type_vector_length * sizeof (struct type *)); | |
899 | ||
900 | start_symtab (); | |
901 | ||
902 | symnum = 0; | |
903 | while (symnum < nsyms) | |
904 | { | |
905 | QUIT; /* Make this command interruptable. */ | |
906 | read_one_sym (cs, &main_sym, &main_aux); | |
907 | ||
908 | #ifdef SEM | |
909 | temp_sem_val = cs->c_name[0] << 24 | cs->c_name[1] << 16 | | |
910 | cs->c_name[2] << 8 | cs->c_name[3]; | |
911 | if (int_sem_val == temp_sem_val) | |
912 | last_coffsem = (int) strtol (cs->c_name+4, (char **) NULL, 10); | |
913 | #endif | |
914 | ||
915 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) | |
916 | { | |
917 | if (last_source_file) | |
918 | end_symtab (); | |
919 | ||
920 | start_symtab (); | |
921 | complete_symtab ("_globals_", 0, first_object_file_end); | |
922 | /* done with all files, everything from here on out is globals */ | |
923 | } | |
924 | ||
925 | /* Special case for file with type declarations only, no text. */ | |
8714ff35 JK |
926 | if (!last_source_file && SDB_TYPE (cs->c_type) |
927 | && cs->c_secnum == N_DEBUG) | |
bd5635a1 RP |
928 | complete_symtab (filestring, 0, 0); |
929 | ||
930 | /* Typedefs should not be treated as symbol definitions. */ | |
931 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) | |
932 | { | |
933 | /* record as misc function. if we get '.bf' next, | |
934 | * then we undo this step | |
935 | */ | |
936 | record_misc_function (cs->c_name, cs->c_value); | |
937 | ||
938 | fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; | |
939 | fcn_start_addr = cs->c_value; | |
940 | fcn_cs_saved = *cs; | |
941 | fcn_sym_saved = main_sym; | |
942 | fcn_aux_saved = main_aux; | |
943 | continue; | |
944 | } | |
945 | ||
946 | switch (cs->c_sclass) | |
947 | { | |
948 | case C_EFCN: | |
949 | case C_EXTDEF: | |
950 | case C_ULABEL: | |
951 | case C_USTATIC: | |
952 | case C_LINE: | |
953 | case C_ALIAS: | |
954 | case C_HIDDEN: | |
955 | printf ("Bad n_sclass = %d\n", cs->c_sclass); | |
956 | break; | |
957 | ||
958 | case C_FILE: | |
959 | /* | |
960 | * c_value field contains symnum of next .file entry in table | |
961 | * or symnum of first global after last .file. | |
962 | */ | |
963 | next_file_symnum = cs->c_value; | |
964 | filestring = getfilename (&main_aux); | |
965 | /* | |
966 | * Complete symbol table for last object file | |
967 | * containing debugging information. | |
968 | */ | |
969 | if (last_source_file) | |
970 | { | |
971 | end_symtab (); | |
972 | start_symtab (); | |
973 | } | |
974 | in_source_file = 1; | |
975 | break; | |
976 | ||
977 | case C_STAT: | |
978 | if (cs->c_name[0] == '.') { | |
d8ce1326 JG |
979 | if (strcmp (cs->c_name, ".text") == 0) { |
980 | /* FIXME: don't wire in ".text" as section name | |
981 | or symbol name! */ | |
bd5635a1 RP |
982 | if (++num_object_files == 1) { |
983 | /* last address of startup file */ | |
984 | first_object_file_end = cs->c_value + | |
985 | main_aux.x_scn.x_scnlen; | |
986 | } | |
987 | /* Check for in_source_file deals with case of | |
988 | a file with debugging symbols | |
989 | followed by a later file with no symbols. */ | |
990 | if (in_source_file) | |
991 | complete_symtab (filestring, cs->c_value, | |
992 | main_aux.x_scn.x_scnlen); | |
993 | in_source_file = 0; | |
994 | } | |
995 | /* flush rest of '.' symbols */ | |
996 | break; | |
997 | } | |
8714ff35 | 998 | else if (!SDB_TYPE (cs->c_type) |
bd5635a1 RP |
999 | && cs->c_name[0] == 'L' |
1000 | && (strncmp (cs->c_name, "LI%", 3) == 0 | |
8714ff35 | 1001 | || strncmp (cs->c_name, "LF%", 3) == 0 |
bd5635a1 RP |
1002 | || strncmp (cs->c_name,"LC%",3) == 0 |
1003 | || strncmp (cs->c_name,"LP%",3) == 0 | |
1004 | || strncmp (cs->c_name,"LPB%",4) == 0 | |
1005 | || strncmp (cs->c_name,"LBB%",4) == 0 | |
1006 | || strncmp (cs->c_name,"LBE%",4) == 0 | |
1007 | || strncmp (cs->c_name,"LPBX%",5) == 0)) | |
1008 | /* At least on a 3b1, gcc generates swbeg and string labels | |
1009 | that look like this. Ignore them. */ | |
1010 | break; | |
1011 | /* fall in for static symbols that don't start with '.' */ | |
1012 | case C_EXT: | |
8714ff35 | 1013 | if (!SDB_TYPE (cs->c_type)) { |
d8ce1326 JG |
1014 | /* FIXME: This is BOGUS Will Robinson! |
1015 | Coff should provide the SEC_CODE flag for executable sections, | |
1016 | then if we could look up sections by section number we | |
1017 | could see if the flags indicate SEC_CODE. If so, then | |
1018 | record this symbol as a miscellaneous function. But why | |
1019 | are absolute syms recorded as functions, anyway? */ | |
1020 | if (cs->c_secnum <= text_bfd_scnum+1) {/* text or abs */ | |
bd5635a1 RP |
1021 | record_misc_function (cs->c_name, cs->c_value); |
1022 | break; | |
1023 | } else { | |
1024 | cs->c_type = T_INT; | |
1025 | } | |
1026 | } | |
1027 | (void) process_coff_symbol (cs, &main_aux); | |
1028 | break; | |
1029 | ||
1030 | case C_FCN: | |
1031 | if (strcmp (cs->c_name, ".bf") == 0) | |
1032 | { | |
1033 | within_function = 1; | |
1034 | ||
1035 | /* value contains address of first non-init type code */ | |
1036 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1037 | contains line number of '{' } */ | |
1038 | fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1039 | ||
1040 | new = (struct context_stack *) | |
1041 | xmalloc (sizeof (struct context_stack)); | |
1042 | new->depth = depth = 0; | |
1043 | new->next = 0; | |
1044 | context_stack = new; | |
1045 | new->locals = 0; | |
1046 | new->old_blocks = pending_blocks; | |
1047 | new->start_addr = fcn_start_addr; | |
1048 | fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); | |
1049 | new->name = process_coff_symbol (&fcn_cs_saved, | |
1050 | &fcn_aux_saved); | |
1051 | } | |
1052 | else if (strcmp (cs->c_name, ".ef") == 0) | |
1053 | { | |
1054 | /* the value of .ef is the address of epilogue code; | |
1055 | * not useful for gdb | |
1056 | */ | |
1057 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1058 | contains number of lines to '}' */ | |
1059 | new = context_stack; | |
1060 | if (new == 0) | |
1061 | { | |
1062 | complain (&ef_complaint, cs->c_symnum); | |
1063 | within_function = 0; | |
1064 | break; | |
1065 | } | |
1066 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1067 | enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line); | |
1068 | ||
1069 | finish_block (new->name, &local_symbols, new->old_blocks, | |
1070 | new->start_addr, | |
1071 | #if defined (FUNCTION_EPILOGUE_SIZE) | |
1072 | /* This macro should be defined only on | |
1073 | machines where the | |
1074 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
1075 | field is always zero. | |
1076 | So use the .bf record information that | |
1077 | points to the epilogue and add the size | |
1078 | of the epilogue. */ | |
1079 | cs->c_value + FUNCTION_EPILOGUE_SIZE | |
1080 | #else | |
1081 | fcn_cs_saved.c_value + | |
1082 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
1083 | #endif | |
1084 | ); | |
1085 | context_stack = 0; | |
1086 | within_function = 0; | |
1087 | free (new); | |
1088 | } | |
1089 | break; | |
1090 | ||
1091 | case C_BLOCK: | |
1092 | if (strcmp (cs->c_name, ".bb") == 0) | |
1093 | { | |
1094 | new = (struct context_stack *) | |
1095 | xmalloc (sizeof (struct context_stack)); | |
1096 | depth++; | |
1097 | new->depth = depth; | |
1098 | new->next = context_stack; | |
1099 | context_stack = new; | |
1100 | new->locals = local_symbols; | |
1101 | new->old_blocks = pending_blocks; | |
1102 | new->start_addr = cs->c_value; | |
1103 | new->name = 0; | |
1104 | local_symbols = 0; | |
1105 | } | |
1106 | else if (strcmp (cs->c_name, ".eb") == 0) | |
1107 | { | |
1108 | new = context_stack; | |
1109 | if (new == 0 || depth != new->depth) | |
1110 | error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.", | |
1111 | symnum); | |
1112 | if (local_symbols && context_stack->next) | |
1113 | { | |
1114 | /* Make a block for the local symbols within. */ | |
1115 | finish_block (0, &local_symbols, new->old_blocks, | |
1116 | new->start_addr, cs->c_value); | |
1117 | } | |
1118 | depth--; | |
1119 | local_symbols = new->locals; | |
1120 | context_stack = new->next; | |
1121 | free (new); | |
1122 | } | |
1123 | break; | |
1124 | #ifdef TDESC | |
1125 | case C_VERSION: | |
8aa13b87 JK |
1126 | #if 0 |
1127 | /* This isn't used currently. */ | |
bd5635a1 RP |
1128 | if (strcmp (cs->c_name, ".coffsyn") == 0) |
1129 | last_coffsyn = cs->c_value; | |
8aa13b87 JK |
1130 | else |
1131 | #endif /* 0 */ | |
1132 | if ((strcmp (cs->c_name, ".coffsem") == 0) && | |
bd5635a1 RP |
1133 | (cs->c_value != 0)) |
1134 | last_coffsem = cs->c_value; | |
1135 | break; | |
8aa13b87 | 1136 | #endif /* TDESC */ |
bd5635a1 RP |
1137 | |
1138 | default: | |
1139 | #ifdef TDESC | |
1140 | if ((strcmp (cs->c_name, ".coffsem") == 0) && | |
1141 | (cs->c_value != 0)) | |
1142 | last_coffsem = cs->c_value; | |
1143 | else | |
1144 | #endif | |
1145 | (void) process_coff_symbol (cs, &main_aux); | |
1146 | break; | |
1147 | } | |
1148 | } | |
1149 | ||
1150 | if (last_source_file) | |
1151 | end_symtab (); | |
1152 | fclose (stream); | |
1153 | discard_cleanups (old_chain); | |
1154 | } | |
1155 | \f | |
1156 | /* Routines for reading headers and symbols from executable. */ | |
1157 | ||
1158 | #ifdef FIXME | |
1159 | /* Move these XXXMAGIC symbol defns into BFD! */ | |
1160 | ||
1161 | /* Read COFF file header, check magic number, | |
1162 | and return number of symbols. */ | |
1163 | read_file_hdr (chan, file_hdr) | |
1164 | int chan; | |
1165 | FILHDR *file_hdr; | |
1166 | { | |
1167 | lseek (chan, 0L, 0); | |
1168 | if (myread (chan, (char *)file_hdr, FILHSZ) < 0) | |
1169 | return -1; | |
1170 | ||
1171 | switch (file_hdr->f_magic) | |
1172 | { | |
1173 | #ifdef MC68MAGIC | |
1174 | case MC68MAGIC: | |
1175 | #endif | |
1176 | #ifdef NS32GMAGIC | |
1177 | case NS32GMAGIC: | |
1178 | case NS32SMAGIC: | |
1179 | #endif | |
1180 | #ifdef I386MAGIC | |
1181 | case I386MAGIC: | |
1182 | #endif | |
1183 | #ifdef CLIPPERMAGIC | |
1184 | case CLIPPERMAGIC: | |
1185 | #endif | |
1186 | #if defined (MC68KWRMAGIC) \ | |
1187 | && (!defined (MC68MAGIC) || MC68KWRMAGIC != MC68MAGIC) | |
1188 | case MC68KWRMAGIC: | |
1189 | #endif | |
1190 | #ifdef MC68KROMAGIC | |
1191 | case MC68KROMAGIC: | |
1192 | case MC68KPGMAGIC: | |
1193 | #endif | |
1194 | #ifdef MC88DGMAGIC | |
1195 | case MC88DGMAGIC: | |
1196 | #endif | |
1197 | #ifdef MC88MAGIC | |
1198 | case MC88MAGIC: | |
1199 | #endif | |
1200 | #ifdef I960ROMAGIC | |
1201 | case I960ROMAGIC: /* Intel 960 */ | |
1202 | #endif | |
1203 | #ifdef I960RWMAGIC | |
1204 | case I960RWMAGIC: /* Intel 960 */ | |
1205 | #endif | |
1206 | return file_hdr->f_nsyms; | |
1207 | ||
1208 | default: | |
1209 | #ifdef BADMAG | |
1210 | if (BADMAG(file_hdr)) | |
1211 | return -1; | |
1212 | else | |
1213 | return file_hdr->f_nsyms; | |
1214 | #else | |
1215 | return -1; | |
1216 | #endif | |
1217 | } | |
1218 | } | |
1219 | #endif | |
1220 | ||
dcc35536 JG |
1221 | /* Read the next symbol, swap it, and return it in both internal_syment |
1222 | form, and coff_symbol form. Also return its first auxent, if any, | |
1223 | in internal_auxent form, and skip any other auxents. */ | |
bd5635a1 RP |
1224 | |
1225 | static void | |
1226 | read_one_sym (cs, sym, aux) | |
1227 | register struct coff_symbol *cs; | |
dcc35536 JG |
1228 | register struct internal_syment *sym; |
1229 | register union internal_auxent *aux; | |
bd5635a1 | 1230 | { |
bd5635a1 RP |
1231 | int i; |
1232 | ||
1233 | cs->c_symnum = symnum; | |
d8ce1326 JG |
1234 | fread (temp_sym, local_symesz, 1, nlist_stream_global); |
1235 | bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *)sym); | |
bd5635a1 RP |
1236 | cs->c_nsyms = (sym->n_numaux & 0xff) + 1; |
1237 | if (cs->c_nsyms >= 2) | |
1238 | { | |
d8ce1326 JG |
1239 | fread (temp_aux, local_auxesz, 1, nlist_stream_global); |
1240 | bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass, | |
1241 | (char *)aux); | |
bd5635a1 RP |
1242 | /* If more than one aux entry, read past it (only the first aux |
1243 | is important). */ | |
1244 | for (i = 2; i < cs->c_nsyms; i++) | |
d8ce1326 | 1245 | fread (temp_aux, local_auxesz, 1, nlist_stream_global); |
bd5635a1 RP |
1246 | } |
1247 | cs->c_name = getsymname (sym); | |
1248 | cs->c_value = sym->n_value; | |
1249 | cs->c_sclass = (sym->n_sclass & 0xff); | |
1250 | cs->c_secnum = sym->n_scnum; | |
1251 | cs->c_type = (unsigned) sym->n_type; | |
8714ff35 JK |
1252 | if (!SDB_TYPE (cs->c_type)) |
1253 | cs->c_type = 0; | |
bd5635a1 RP |
1254 | |
1255 | symnum += cs->c_nsyms; | |
1256 | } | |
1257 | \f | |
1258 | /* Support for string table handling */ | |
1259 | ||
1260 | static char *stringtab = NULL; | |
1261 | ||
1262 | static int | |
1263 | init_stringtab (chan, offset) | |
1264 | int chan; | |
1265 | long offset; | |
1266 | { | |
1267 | long length; | |
1268 | int val; | |
1269 | unsigned char lengthbuf[4]; | |
1270 | ||
1271 | if (stringtab) | |
1272 | { | |
1273 | free (stringtab); | |
1274 | stringtab = NULL; | |
1275 | } | |
1276 | ||
1277 | if (lseek (chan, offset, 0) < 0) | |
1278 | return -1; | |
1279 | ||
1280 | val = myread (chan, (char *)lengthbuf, sizeof lengthbuf); | |
dcc35536 | 1281 | length = bfd_h_get_32 (symfile_bfd, lengthbuf); |
bd5635a1 RP |
1282 | |
1283 | /* If no string table is needed, then the file may end immediately | |
1284 | after the symbols. Just return with `stringtab' set to null. */ | |
1285 | if (val != sizeof length || length < sizeof length) | |
1286 | return 0; | |
1287 | ||
1288 | stringtab = (char *) xmalloc (length); | |
1289 | if (stringtab == NULL) | |
1290 | return -1; | |
1291 | ||
1292 | bcopy (&length, stringtab, sizeof length); | |
1293 | if (length == sizeof length) /* Empty table -- just the count */ | |
1294 | return 0; | |
1295 | ||
1296 | val = myread (chan, stringtab + sizeof length, length - sizeof length); | |
1297 | if (val != length - sizeof length || stringtab[length - 1] != '\0') | |
1298 | return -1; | |
1299 | ||
1300 | return 0; | |
1301 | } | |
1302 | ||
1303 | static void | |
1304 | free_stringtab () | |
1305 | { | |
1306 | if (stringtab) | |
1307 | free (stringtab); | |
1308 | stringtab = NULL; | |
1309 | } | |
1310 | ||
1311 | static char * | |
1312 | getsymname (symbol_entry) | |
dcc35536 | 1313 | struct internal_syment *symbol_entry; |
bd5635a1 RP |
1314 | { |
1315 | static char buffer[SYMNMLEN+1]; | |
1316 | char *result; | |
1317 | ||
dcc35536 | 1318 | if (symbol_entry->_n._n_n._n_zeroes == 0) |
bd5635a1 | 1319 | { |
dcc35536 | 1320 | result = stringtab + symbol_entry->_n._n_n._n_offset; |
bd5635a1 RP |
1321 | } |
1322 | else | |
1323 | { | |
dcc35536 | 1324 | strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN); |
bd5635a1 RP |
1325 | buffer[SYMNMLEN] = '\0'; |
1326 | result = buffer; | |
1327 | } | |
1328 | return result; | |
1329 | } | |
1330 | ||
1331 | static char * | |
1332 | getfilename (aux_entry) | |
dcc35536 | 1333 | union internal_auxent *aux_entry; |
bd5635a1 RP |
1334 | { |
1335 | static char buffer[BUFSIZ]; | |
1336 | register char *temp; | |
1337 | char *result; | |
1338 | extern char *rindex (); | |
1339 | ||
1340 | #ifndef COFF_NO_LONG_FILE_NAMES | |
8aa13b87 JK |
1341 | #if defined (x_zeroes) |
1342 | /* Data General. */ | |
1343 | if (aux_entry->x_zeroes == 0) | |
1344 | strcpy (buffer, stringtab + aux_entry->x_offset); | |
1345 | #else /* no x_zeroes */ | |
bd5635a1 RP |
1346 | if (aux_entry->x_file.x_n.x_zeroes == 0) |
1347 | strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); | |
8aa13b87 | 1348 | #endif /* no x_zeroes */ |
bd5635a1 RP |
1349 | else |
1350 | #endif /* COFF_NO_LONG_FILE_NAMES */ | |
1351 | { | |
1352 | #if defined (x_name) | |
1353 | /* Data General. */ | |
1354 | strncpy (buffer, aux_entry->x_name, FILNMLEN); | |
1355 | #else | |
1356 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); | |
1357 | #endif | |
1358 | buffer[FILNMLEN] = '\0'; | |
1359 | } | |
1360 | result = buffer; | |
1361 | if ((temp = rindex (result, '/')) != NULL) | |
1362 | result = temp + 1; | |
1363 | return (result); | |
1364 | } | |
1365 | \f | |
1366 | /* Support for line number handling */ | |
1367 | static char *linetab = NULL; | |
1368 | static long linetab_offset; | |
1369 | static unsigned long linetab_size; | |
1370 | ||
dcc35536 JG |
1371 | /* Read in all the line numbers for fast lookups later. Leave them in |
1372 | external (unswapped) format in memory; we'll swap them as we enter | |
1373 | them into GDB's data structures. */ | |
bd5635a1 RP |
1374 | |
1375 | static int | |
1376 | init_lineno (chan, offset, size) | |
1377 | int chan; | |
1378 | long offset; | |
1379 | int size; | |
1380 | { | |
1381 | int val; | |
bd5635a1 | 1382 | |
61a7292f SG |
1383 | linetab_offset = offset; |
1384 | linetab_size = size; | |
1385 | ||
1386 | if (size == 0) | |
1387 | return 0; | |
1388 | ||
bd5635a1 RP |
1389 | if (lseek (chan, offset, 0) < 0) |
1390 | return -1; | |
1391 | ||
1392 | linetab = (char *) xmalloc (size); | |
1393 | ||
1394 | val = myread (chan, linetab, size); | |
1395 | if (val != size) | |
1396 | return -1; | |
1397 | ||
bd5635a1 RP |
1398 | make_cleanup (free, linetab); /* Be sure it gets de-allocated. */ |
1399 | return 0; | |
1400 | } | |
1401 | ||
1402 | #if !defined (L_LNNO32) | |
1403 | #define L_LNNO32(lp) ((lp)->l_lnno) | |
1404 | #endif | |
1405 | ||
1406 | static void | |
1407 | enter_linenos (file_offset, first_line, last_line) | |
1408 | long file_offset; | |
1409 | register int first_line; | |
1410 | register int last_line; | |
1411 | { | |
1412 | register char *rawptr; | |
dcc35536 | 1413 | struct internal_lineno lptr; |
bd5635a1 RP |
1414 | |
1415 | if (file_offset < linetab_offset) | |
1416 | { | |
5594d534 | 1417 | complain (&lineno_complaint, file_offset); |
63989338 JG |
1418 | if (file_offset > linetab_size) /* Too big to be an offset? */ |
1419 | return; | |
1420 | file_offset += linetab_offset; /* Try reading at that linetab offset */ | |
bd5635a1 RP |
1421 | } |
1422 | ||
1423 | rawptr = &linetab[file_offset - linetab_offset]; | |
1424 | ||
1425 | /* skip first line entry for each function */ | |
d8ce1326 | 1426 | rawptr += local_linesz; |
bd5635a1 RP |
1427 | /* line numbers start at one for the first line of the function */ |
1428 | first_line--; | |
1429 | ||
dcc35536 | 1430 | for (;;) { |
d8ce1326 JG |
1431 | bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr); |
1432 | rawptr += local_linesz; | |
dcc35536 | 1433 | if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line) |
bd5635a1 | 1434 | record_line (first_line + L_LNNO32 (&lptr), lptr.l_addr.l_paddr); |
dcc35536 JG |
1435 | else |
1436 | break; | |
1437 | } | |
bd5635a1 RP |
1438 | } |
1439 | \f | |
1440 | static int | |
1441 | hashname (name) | |
1442 | char *name; | |
1443 | { | |
1444 | register char *p = name; | |
1445 | register int total = p[0]; | |
1446 | register int c; | |
1447 | ||
1448 | c = p[1]; | |
1449 | total += c << 2; | |
1450 | if (c) | |
1451 | { | |
1452 | c = p[2]; | |
1453 | total += c << 4; | |
1454 | if (c) | |
1455 | total += p[3] << 6; | |
1456 | } | |
1457 | ||
1458 | return total % HASHSIZE; | |
1459 | } | |
1460 | ||
1461 | static void | |
1462 | patch_type (type, real_type) | |
1463 | struct type *type; | |
1464 | struct type *real_type; | |
1465 | { | |
1466 | register struct type *target = TYPE_TARGET_TYPE (type); | |
1467 | register struct type *real_target = TYPE_TARGET_TYPE (real_type); | |
1468 | int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); | |
1469 | ||
1470 | TYPE_LENGTH (target) = TYPE_LENGTH (real_target); | |
1471 | TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); | |
1472 | TYPE_FIELDS (target) = (struct field *) | |
1473 | obstack_alloc (symbol_obstack, field_size); | |
1474 | ||
1475 | bcopy (TYPE_FIELDS (real_target), TYPE_FIELDS (target), field_size); | |
1476 | ||
1477 | if (TYPE_NAME (real_target)) | |
1478 | { | |
1479 | if (TYPE_NAME (target)) | |
1480 | free (TYPE_NAME (target)); | |
1481 | TYPE_NAME (target) = concat (TYPE_NAME (real_target), "", ""); | |
1482 | } | |
1483 | } | |
1484 | ||
1485 | /* Patch up all appropriate typdef symbols in the opaque_type_chains | |
1486 | so that they can be used to print out opaque data structures properly */ | |
1487 | ||
1488 | static void | |
1489 | patch_opaque_types () | |
1490 | { | |
1491 | struct symtab *s; | |
1492 | ||
1493 | /* Look at each symbol in the per-file block of each symtab. */ | |
1494 | for (s = symtab_list; s; s = s->next) | |
1495 | { | |
1496 | register struct block *b; | |
1497 | register int i; | |
1498 | ||
1499 | /* Go through the per-file symbols only */ | |
a6e2b424 | 1500 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); |
bd5635a1 RP |
1501 | for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--) |
1502 | { | |
1503 | register struct symbol *real_sym; | |
1504 | ||
1505 | /* Find completed typedefs to use to fix opaque ones. | |
1506 | Remove syms from the chain when their types are stored, | |
1507 | but search the whole chain, as there may be several syms | |
1508 | from different files with the same name. */ | |
1509 | real_sym = BLOCK_SYM (b, i); | |
1510 | if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF && | |
1511 | SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE && | |
1512 | TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR && | |
1513 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) | |
1514 | { | |
1515 | register char *name = SYMBOL_NAME (real_sym); | |
1516 | register int hash = hashname (name); | |
1517 | register struct symbol *sym, *prev; | |
1518 | ||
1519 | prev = 0; | |
1520 | for (sym = opaque_type_chain[hash]; sym;) | |
1521 | { | |
1522 | if (name[0] == SYMBOL_NAME (sym)[0] && | |
1523 | !strcmp (name + 1, SYMBOL_NAME (sym) + 1)) | |
1524 | { | |
1525 | if (prev) | |
1526 | SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); | |
1527 | else | |
1528 | opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); | |
1529 | ||
1530 | patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); | |
1531 | ||
1532 | if (prev) | |
1533 | sym = SYMBOL_VALUE_CHAIN (prev); | |
1534 | else | |
1535 | sym = opaque_type_chain[hash]; | |
1536 | } | |
1537 | else | |
1538 | { | |
1539 | prev = sym; | |
1540 | sym = SYMBOL_VALUE_CHAIN (sym); | |
1541 | } | |
1542 | } | |
1543 | } | |
1544 | } | |
1545 | } | |
1546 | } | |
1547 | \f | |
1548 | #if defined (clipper) | |
1549 | #define BELIEVE_PCC_PROMOTION 1 | |
1550 | #endif | |
1551 | ||
1552 | static struct symbol * | |
1553 | process_coff_symbol (cs, aux) | |
1554 | register struct coff_symbol *cs; | |
dcc35536 | 1555 | register union internal_auxent *aux; |
bd5635a1 RP |
1556 | { |
1557 | register struct symbol *sym | |
1558 | = (struct symbol *) obstack_alloc (symbol_obstack, sizeof (struct symbol)); | |
1559 | char *name; | |
1560 | #ifdef NAMES_HAVE_UNDERSCORE | |
1561 | int offset = 1; | |
1562 | #else | |
1563 | int offset = 0; | |
1564 | #endif | |
1565 | ||
1566 | bzero (sym, sizeof (struct symbol)); | |
1567 | name = cs->c_name; | |
1568 | name = (name[0] == '_' ? name + offset : name); | |
1569 | SYMBOL_NAME (sym) = obstack_copy0 (symbol_obstack, name, strlen (name)); | |
1570 | ||
1571 | /* default assumptions */ | |
1572 | SYMBOL_VALUE (sym) = cs->c_value; | |
1573 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1574 | ||
1575 | if (ISFCN (cs->c_type)) | |
1576 | { | |
d8ce1326 JG |
1577 | #if 0 |
1578 | /* FIXME: This has NOT been tested. The DBX version has.. */ | |
1579 | /* Generate a template for the type of this function. The | |
1580 | types of the arguments will be added as we read the symbol | |
1581 | table. */ | |
1582 | struct type *new = (struct type *) | |
1583 | obstack_alloc (symbol_obstack, sizeof (struct type)); | |
1584 | ||
1585 | bcopy(lookup_function_type (decode_function_type (cs, cs->c_type, aux)), | |
1586 | new, sizeof(struct type)); | |
1587 | SYMBOL_TYPE (sym) = new; | |
1588 | in_function_type = SYMBOL_TYPE(sym); | |
1589 | #else | |
1590 | SYMBOL_TYPE(sym) = | |
1591 | lookup_function_type (decode_function_type (cs, cs->c_type, aux)); | |
1592 | #endif | |
1593 | ||
bd5635a1 RP |
1594 | SYMBOL_CLASS (sym) = LOC_BLOCK; |
1595 | if (cs->c_sclass == C_STAT) | |
1596 | add_symbol_to_list (sym, &file_symbols); | |
1597 | else if (cs->c_sclass == C_EXT) | |
1598 | add_symbol_to_list (sym, &global_symbols); | |
1599 | } | |
1600 | else | |
1601 | { | |
1602 | SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux); | |
1603 | switch (cs->c_sclass) | |
1604 | { | |
1605 | case C_NULL: | |
1606 | break; | |
1607 | ||
1608 | case C_AUTO: | |
1609 | SYMBOL_CLASS (sym) = LOC_LOCAL; | |
1610 | add_symbol_to_list (sym, &local_symbols); | |
1611 | break; | |
1612 | ||
1613 | case C_EXT: | |
1614 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1615 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
1616 | add_symbol_to_list (sym, &global_symbols); | |
1617 | break; | |
1618 | ||
1619 | case C_STAT: | |
1620 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1621 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
1622 | if (within_function) { | |
1623 | /* Static symbol of local scope */ | |
1624 | add_symbol_to_list (sym, &local_symbols); | |
1625 | } | |
1626 | else { | |
1627 | /* Static symbol at top level of file */ | |
1628 | add_symbol_to_list (sym, &file_symbols); | |
1629 | } | |
1630 | break; | |
1631 | ||
d8ce1326 JG |
1632 | #ifdef C_GLBLREG /* AMD coff */ |
1633 | case C_GLBLREG: | |
1634 | #endif | |
bd5635a1 RP |
1635 | case C_REG: |
1636 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
d8ce1326 | 1637 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value); |
bd5635a1 RP |
1638 | add_symbol_to_list (sym, &local_symbols); |
1639 | break; | |
1640 | ||
1641 | case C_LABEL: | |
1642 | break; | |
1643 | ||
1644 | case C_ARG: | |
1645 | SYMBOL_CLASS (sym) = LOC_ARG; | |
d8ce1326 JG |
1646 | #if 0 |
1647 | /* FIXME: This has not bee tested. */ | |
1648 | /* Add parameter to function. */ | |
1649 | add_param_to_type(&in_function_type,sym); | |
1650 | #endif | |
bd5635a1 RP |
1651 | add_symbol_to_list (sym, &local_symbols); |
1652 | #if !defined (BELIEVE_PCC_PROMOTION) | |
1653 | /* If PCC says a parameter is a short or a char, | |
1654 | it is really an int. */ | |
1655 | if (SYMBOL_TYPE (sym) == builtin_type_char | |
1656 | || SYMBOL_TYPE (sym) == builtin_type_short) | |
1657 | SYMBOL_TYPE (sym) = builtin_type_int; | |
1658 | else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char | |
1659 | || SYMBOL_TYPE (sym) == builtin_type_unsigned_short) | |
1660 | SYMBOL_TYPE (sym) = builtin_type_unsigned_int; | |
1661 | #endif | |
1662 | break; | |
1663 | ||
1664 | case C_REGPARM: | |
1665 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
d8ce1326 | 1666 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value); |
bd5635a1 RP |
1667 | add_symbol_to_list (sym, &local_symbols); |
1668 | #if !defined (BELIEVE_PCC_PROMOTION) | |
1669 | /* If PCC says a parameter is a short or a char, | |
1670 | it is really an int. */ | |
1671 | if (SYMBOL_TYPE (sym) == builtin_type_char | |
1672 | || SYMBOL_TYPE (sym) == builtin_type_short) | |
1673 | SYMBOL_TYPE (sym) = builtin_type_int; | |
1674 | else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char | |
1675 | || SYMBOL_TYPE (sym) == builtin_type_unsigned_short) | |
1676 | SYMBOL_TYPE (sym) = builtin_type_unsigned_int; | |
1677 | #endif | |
1678 | break; | |
1679 | ||
1680 | case C_TPDEF: | |
1681 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1682 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1683 | ||
1684 | /* If type has no name, give it one */ | |
1685 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0 | |
1686 | && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0) | |
1687 | TYPE_NAME (SYMBOL_TYPE (sym)) | |
1688 | = concat (SYMBOL_NAME (sym), "", ""); | |
1689 | ||
1690 | /* Keep track of any type which points to empty structured type, | |
1691 | so it can be filled from a definition from another file */ | |
1692 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && | |
1693 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0) | |
1694 | { | |
1695 | register int i = hashname (SYMBOL_NAME (sym)); | |
1696 | ||
1697 | SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; | |
1698 | opaque_type_chain[i] = sym; | |
1699 | } | |
1700 | add_symbol_to_list (sym, &file_symbols); | |
1701 | break; | |
1702 | ||
1703 | case C_STRTAG: | |
1704 | case C_UNTAG: | |
1705 | case C_ENTAG: | |
1706 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1707 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
1708 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0 | |
1709 | && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0) | |
1710 | TYPE_NAME (SYMBOL_TYPE (sym)) | |
1711 | = concat ("", | |
1712 | (cs->c_sclass == C_ENTAG | |
1713 | ? "enum " | |
1714 | : (cs->c_sclass == C_STRTAG | |
1715 | ? "struct " : "union ")), | |
1716 | SYMBOL_NAME (sym)); | |
1717 | add_symbol_to_list (sym, &file_symbols); | |
1718 | break; | |
1719 | ||
1720 | default: | |
1721 | break; | |
1722 | } | |
1723 | } | |
1724 | return sym; | |
1725 | } | |
1726 | \f | |
1727 | /* Decode a coff type specifier; | |
1728 | return the type that is meant. */ | |
1729 | ||
1730 | static | |
1731 | struct type * | |
1732 | decode_type (cs, c_type, aux) | |
1733 | register struct coff_symbol *cs; | |
1734 | unsigned int c_type; | |
dcc35536 | 1735 | register union internal_auxent *aux; |
bd5635a1 RP |
1736 | { |
1737 | register struct type *type = 0; | |
1738 | unsigned int new_c_type; | |
1739 | ||
1740 | if (c_type & ~N_BTMASK) | |
1741 | { | |
1742 | new_c_type = DECREF (c_type); | |
1743 | if (ISPTR (c_type)) | |
1744 | { | |
1745 | type = decode_type (cs, new_c_type, aux); | |
1746 | type = lookup_pointer_type (type); | |
1747 | } | |
1748 | else if (ISFCN (c_type)) | |
1749 | { | |
1750 | type = decode_type (cs, new_c_type, aux); | |
1751 | type = lookup_function_type (type); | |
1752 | } | |
1753 | else if (ISARY (c_type)) | |
1754 | { | |
1755 | int i, n; | |
1756 | register unsigned short *dim; | |
1757 | struct type *base_type; | |
1758 | ||
1759 | /* Define an array type. */ | |
1760 | /* auxent refers to array, not base type */ | |
6988f5c0 | 1761 | if (aux->x_sym.x_tagndx.l == 0) |
bd5635a1 RP |
1762 | cs->c_nsyms = 1; |
1763 | ||
1764 | /* shift the indices down */ | |
1765 | dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; | |
1766 | i = 1; | |
1767 | n = dim[0]; | |
1768 | for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) | |
1769 | *dim = *(dim + 1); | |
1770 | *dim = 0; | |
1771 | ||
1772 | type = (struct type *) | |
1773 | obstack_alloc (symbol_obstack, sizeof (struct type)); | |
1774 | bzero (type, sizeof (struct type)); | |
1775 | ||
1776 | base_type = decode_type (cs, new_c_type, aux); | |
1777 | ||
1778 | TYPE_CODE (type) = TYPE_CODE_ARRAY; | |
1779 | TYPE_TARGET_TYPE (type) = base_type; | |
1780 | TYPE_LENGTH (type) = n * TYPE_LENGTH (base_type); | |
1781 | } | |
1782 | return type; | |
1783 | } | |
1784 | ||
1785 | /* Reference to existing type */ | |
6988f5c0 | 1786 | if (cs->c_nsyms > 1 && aux->x_sym.x_tagndx.l != 0) |
bd5635a1 | 1787 | { |
cadbb07a | 1788 | type = coff_alloc_type (aux->x_sym.x_tagndx.l); |
bd5635a1 RP |
1789 | return type; |
1790 | } | |
1791 | ||
1792 | return decode_base_type (cs, BTYPE (c_type), aux); | |
1793 | } | |
1794 | ||
1795 | /* Decode a coff type specifier for function definition; | |
1796 | return the type that the function returns. */ | |
1797 | ||
1798 | static | |
1799 | struct type * | |
1800 | decode_function_type (cs, c_type, aux) | |
1801 | register struct coff_symbol *cs; | |
1802 | unsigned int c_type; | |
dcc35536 | 1803 | register union internal_auxent *aux; |
bd5635a1 | 1804 | { |
6988f5c0 | 1805 | if (aux->x_sym.x_tagndx.l == 0) |
bd5635a1 RP |
1806 | cs->c_nsyms = 1; /* auxent refers to function, not base type */ |
1807 | ||
1808 | return decode_type (cs, DECREF (c_type), aux); | |
1809 | } | |
1810 | \f | |
1811 | /* basic C types */ | |
1812 | ||
1813 | static | |
1814 | struct type * | |
1815 | decode_base_type (cs, c_type, aux) | |
1816 | register struct coff_symbol *cs; | |
1817 | unsigned int c_type; | |
dcc35536 | 1818 | register union internal_auxent *aux; |
bd5635a1 RP |
1819 | { |
1820 | struct type *type; | |
1821 | ||
1822 | switch (c_type) | |
1823 | { | |
1824 | case T_NULL: | |
1825 | /* shows up with "void (*foo)();" structure members */ | |
1826 | return builtin_type_void; | |
1827 | ||
8aa13b87 JK |
1828 | #if 0 |
1829 | /* DGUX actually defines both T_ARG and T_VOID to the same value. */ | |
bd5635a1 RP |
1830 | #ifdef T_ARG |
1831 | case T_ARG: | |
1832 | /* Shows up in DGUX, I think. Not sure where. */ | |
1833 | return builtin_type_void; /* shouldn't show up here */ | |
1834 | #endif | |
8aa13b87 | 1835 | #endif /* 0 */ |
bd5635a1 RP |
1836 | |
1837 | #ifdef T_VOID | |
1838 | case T_VOID: | |
1839 | /* Intel 960 COFF has this symbol and meaning. */ | |
1840 | return builtin_type_void; | |
1841 | #endif | |
1842 | ||
1843 | case T_CHAR: | |
1844 | return builtin_type_char; | |
1845 | ||
1846 | case T_SHORT: | |
1847 | return builtin_type_short; | |
1848 | ||
1849 | case T_INT: | |
1850 | return builtin_type_int; | |
1851 | ||
1852 | case T_LONG: | |
1853 | return builtin_type_long; | |
1854 | ||
1855 | case T_FLOAT: | |
1856 | return builtin_type_float; | |
1857 | ||
1858 | case T_DOUBLE: | |
1859 | return builtin_type_double; | |
1860 | ||
1861 | case T_STRUCT: | |
1862 | if (cs->c_nsyms != 2) | |
1863 | { | |
1864 | /* anonymous structure type */ | |
1865 | type = coff_alloc_type (cs->c_symnum); | |
1866 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1867 | TYPE_NAME (type) = concat ("struct ", "<opaque>", ""); | |
1868 | TYPE_LENGTH (type) = 0; | |
1869 | TYPE_FIELDS (type) = 0; | |
1870 | TYPE_NFIELDS (type) = 0; | |
1871 | } | |
1872 | else | |
1873 | { | |
1874 | type = read_struct_type (cs->c_symnum, | |
1875 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1876 | aux->x_sym.x_fcnary.x_fcn.x_endndx); | |
1877 | } | |
1878 | return type; | |
1879 | ||
1880 | case T_UNION: | |
1881 | if (cs->c_nsyms != 2) | |
1882 | { | |
1883 | /* anonymous union type */ | |
1884 | type = coff_alloc_type (cs->c_symnum); | |
1885 | TYPE_NAME (type) = concat ("union ", "<opaque>", ""); | |
1886 | TYPE_LENGTH (type) = 0; | |
1887 | TYPE_FIELDS (type) = 0; | |
1888 | TYPE_NFIELDS (type) = 0; | |
1889 | } | |
1890 | else | |
1891 | { | |
1892 | type = read_struct_type (cs->c_symnum, | |
1893 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1894 | aux->x_sym.x_fcnary.x_fcn.x_endndx); | |
1895 | } | |
1896 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1897 | return type; | |
1898 | ||
1899 | case T_ENUM: | |
1900 | return read_enum_type (cs->c_symnum, | |
1901 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1902 | aux->x_sym.x_fcnary.x_fcn.x_endndx); | |
1903 | ||
1904 | case T_MOE: | |
1905 | /* shouldn't show up here */ | |
1906 | break; | |
1907 | ||
1908 | case T_UCHAR: | |
1909 | return builtin_type_unsigned_char; | |
1910 | ||
1911 | case T_USHORT: | |
1912 | return builtin_type_unsigned_short; | |
1913 | ||
1914 | case T_UINT: | |
1915 | return builtin_type_unsigned_int; | |
1916 | ||
1917 | case T_ULONG: | |
1918 | return builtin_type_unsigned_long; | |
1919 | } | |
1920 | printf ("unexpected type %d at symnum %d\n", c_type, cs->c_symnum); | |
1921 | return builtin_type_void; | |
1922 | } | |
1923 | \f | |
1924 | /* This page contains subroutines of read_type. */ | |
1925 | ||
1926 | /* Read the description of a structure (or union type) | |
1927 | and return an object describing the type. */ | |
1928 | ||
1929 | static struct type * | |
1930 | read_struct_type (index, length, lastsym) | |
1931 | int index; | |
1932 | int length; | |
1933 | int lastsym; | |
1934 | { | |
1935 | struct nextfield | |
1936 | { | |
1937 | struct nextfield *next; | |
1938 | struct field field; | |
1939 | }; | |
1940 | ||
1941 | register struct type *type; | |
1942 | register struct nextfield *list = 0; | |
1943 | struct nextfield *new; | |
1944 | int nfields = 0; | |
1945 | register int n; | |
1946 | char *name; | |
1947 | #ifdef NAMES_HAVE_UNDERSCORE | |
1948 | int offset = 1; | |
1949 | #else | |
1950 | int offset = 0; | |
1951 | #endif | |
1952 | struct coff_symbol member_sym; | |
1953 | register struct coff_symbol *ms = &member_sym; | |
dcc35536 JG |
1954 | struct internal_syment sub_sym; |
1955 | union internal_auxent sub_aux; | |
bd5635a1 RP |
1956 | int done = 0; |
1957 | ||
1958 | type = coff_alloc_type (index); | |
1959 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1960 | TYPE_LENGTH (type) = length; | |
1961 | ||
1962 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
1963 | { | |
1964 | read_one_sym (ms, &sub_sym, &sub_aux); | |
1965 | name = ms->c_name; | |
1966 | name = (name[0] == '_' ? name + offset : name); | |
1967 | ||
1968 | switch (ms->c_sclass) | |
1969 | { | |
1970 | case C_MOS: | |
1971 | case C_MOU: | |
1972 | ||
1973 | /* Get space to record the next field's data. */ | |
1974 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1975 | new->next = list; | |
1976 | list = new; | |
1977 | ||
1978 | /* Save the data. */ | |
1979 | list->field.name = savestring (name, strlen (name)); | |
1980 | list->field.type = decode_type (ms, ms->c_type, &sub_aux); | |
1981 | list->field.bitpos = 8 * ms->c_value; | |
1982 | list->field.bitsize = 0; | |
1983 | nfields++; | |
1984 | break; | |
1985 | ||
1986 | case C_FIELD: | |
1987 | ||
1988 | /* Get space to record the next field's data. */ | |
1989 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1990 | new->next = list; | |
1991 | list = new; | |
1992 | ||
1993 | /* Save the data. */ | |
1994 | list->field.name = savestring (name, strlen (name)); | |
1995 | list->field.type = decode_type (ms, ms->c_type, &sub_aux); | |
1996 | list->field.bitpos = ms->c_value; | |
1997 | list->field.bitsize = sub_aux.x_sym.x_misc.x_lnsz.x_size; | |
1998 | nfields++; | |
1999 | break; | |
2000 | ||
2001 | case C_EOS: | |
2002 | done = 1; | |
2003 | break; | |
2004 | } | |
2005 | } | |
2006 | /* Now create the vector of fields, and record how big it is. */ | |
2007 | ||
2008 | TYPE_NFIELDS (type) = nfields; | |
2009 | TYPE_FIELDS (type) = (struct field *) | |
2010 | obstack_alloc (symbol_obstack, sizeof (struct field) * nfields); | |
2011 | ||
2012 | /* Copy the saved-up fields into the field vector. */ | |
2013 | ||
2014 | for (n = nfields; list; list = list->next) | |
2015 | TYPE_FIELD (type, --n) = list->field; | |
2016 | ||
2017 | return type; | |
2018 | } | |
2019 | \f | |
2020 | /* Read a definition of an enumeration type, | |
2021 | and create and return a suitable type object. | |
2022 | Also defines the symbols that represent the values of the type. */ | |
e1ce8aa5 | 2023 | /* Currently assumes it's sizeof (int) and doesn't use length. */ |
bd5635a1 | 2024 | |
61a7292f | 2025 | /* ARGSUSED */ |
bd5635a1 RP |
2026 | static struct type * |
2027 | read_enum_type (index, length, lastsym) | |
2028 | int index; | |
2029 | int length; | |
2030 | int lastsym; | |
2031 | { | |
2032 | register struct symbol *sym; | |
2033 | register struct type *type; | |
2034 | int nsyms = 0; | |
2035 | int done = 0; | |
2036 | struct pending **symlist; | |
2037 | struct coff_symbol member_sym; | |
2038 | register struct coff_symbol *ms = &member_sym; | |
dcc35536 JG |
2039 | struct internal_syment sub_sym; |
2040 | union internal_auxent sub_aux; | |
bd5635a1 RP |
2041 | struct pending *osyms, *syms; |
2042 | register int n; | |
2043 | char *name; | |
2044 | #ifdef NAMES_HAVE_UNDERSCORE | |
2045 | int offset = 1; | |
2046 | #else | |
2047 | int offset = 0; | |
2048 | #endif | |
2049 | ||
2050 | type = coff_alloc_type (index); | |
2051 | if (within_function) | |
2052 | symlist = &local_symbols; | |
2053 | else | |
2054 | symlist = &file_symbols; | |
2055 | osyms = *symlist; | |
2056 | ||
2057 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
2058 | { | |
2059 | read_one_sym (ms, &sub_sym, &sub_aux); | |
2060 | name = ms->c_name; | |
2061 | name = (name[0] == '_' ? name + offset : name); | |
2062 | ||
2063 | switch (ms->c_sclass) | |
2064 | { | |
2065 | case C_MOE: | |
2066 | sym = (struct symbol *) xmalloc (sizeof (struct symbol)); | |
2067 | bzero (sym, sizeof (struct symbol)); | |
2068 | ||
2069 | SYMBOL_NAME (sym) = savestring (name, strlen (name)); | |
2070 | SYMBOL_CLASS (sym) = LOC_CONST; | |
2071 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2072 | SYMBOL_VALUE (sym) = ms->c_value; | |
2073 | add_symbol_to_list (sym, symlist); | |
2074 | nsyms++; | |
2075 | break; | |
2076 | ||
2077 | case C_EOS: | |
2078 | /* Sometimes the linker (on 386/ix 2.0.2 at least) screws | |
2079 | up the count of how many symbols to read. So stop | |
2080 | on .eos. */ | |
2081 | done = 1; | |
2082 | break; | |
2083 | } | |
2084 | } | |
2085 | ||
2086 | /* Now fill in the fields of the type-structure. */ | |
2087 | ||
e1ce8aa5 | 2088 | /* FIXME: Should be sizeof (int) on target, not host. */ |
bd5635a1 RP |
2089 | TYPE_LENGTH (type) = sizeof (int); |
2090 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
2091 | TYPE_NFIELDS (type) = nsyms; | |
2092 | TYPE_FIELDS (type) = (struct field *) | |
2093 | obstack_alloc (symbol_obstack, sizeof (struct field) * nsyms); | |
2094 | ||
2095 | /* Find the symbols for the values and put them into the type. | |
2096 | The symbols can be found in the symlist that we put them on | |
2097 | to cause them to be defined. osyms contains the old value | |
2098 | of that symlist; everything up to there was defined by us. */ | |
2099 | ||
2100 | for (syms = *symlist, n = nsyms; syms != osyms; syms = syms->next) | |
2101 | { | |
2102 | SYMBOL_TYPE (syms->symbol) = type; | |
2103 | TYPE_FIELD_NAME (type, --n) = SYMBOL_NAME (syms->symbol); | |
2104 | TYPE_FIELD_VALUE (type, n) = 0; | |
2105 | TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (syms->symbol); | |
2106 | TYPE_FIELD_BITSIZE (type, n) = 0; | |
2107 | } | |
d8ce1326 JG |
2108 | /* Is this Modula-2's BOOLEAN type? Flag it as such if so. */ |
2109 | if(TYPE_NFIELDS(type) == 2 && | |
2110 | ((!strcmp(TYPE_FIELD_NAME(type,0),"TRUE") && | |
2111 | !strcmp(TYPE_FIELD_NAME(type,1),"FALSE")) || | |
2112 | (!strcmp(TYPE_FIELD_NAME(type,1),"TRUE") && | |
2113 | !strcmp(TYPE_FIELD_NAME(type,0),"FALSE")))) | |
2114 | TYPE_CODE(type) = TYPE_CODE_BOOL; | |
bd5635a1 RP |
2115 | return type; |
2116 | } | |
2117 | ||
2118 | /* Register our ability to parse symbols for coff BFD files */ | |
2119 | ||
2120 | static struct sym_fns coff_sym_fns = | |
2121 | { | |
8aa13b87 JK |
2122 | /* This assumes that 88kbcs implies TDESC and TDESC implies 88kbcs. |
2123 | If that's not true, this can be relaxed, but if it is true, | |
2124 | it will just cause users grief if we try to read the wrong kind | |
2125 | of symbol file. */ | |
2126 | #if defined (TDESC) | |
2127 | "m88kbcs", 8, | |
2128 | #else /* not TDESC */ | |
bd5635a1 | 2129 | "coff", 4, |
8aa13b87 | 2130 | #endif /* not TDESC */ |
61a7292f | 2131 | coff_new_init, coff_symfile_init, coff_symfile_read, |
bd5635a1 RP |
2132 | }; |
2133 | ||
2134 | void | |
2135 | _initialize_coffread () | |
2136 | { | |
2137 | add_symtab_fns(&coff_sym_fns); | |
2138 | } |