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 | ||
bd5635a1 RP |
99 | /* The index in the symbol table of the last coff symbol that was processed. */ |
100 | ||
101 | static int symnum; | |
102 | ||
103 | /* Vector of types defined so far, indexed by their coff symnum. */ | |
104 | ||
159a075e | 105 | static struct type **type_vector; |
bd5635a1 RP |
106 | |
107 | /* Number of elements allocated for type_vector currently. */ | |
108 | ||
109 | static int type_vector_length; | |
110 | ||
111 | /* Vector of line number information. */ | |
112 | ||
113 | static struct linetable *line_vector; | |
114 | ||
115 | /* Index of next entry to go in line_vector_index. */ | |
116 | ||
117 | static int line_vector_index; | |
118 | ||
119 | /* Last line number recorded in the line vector. */ | |
120 | ||
121 | static int prev_line_number; | |
122 | ||
123 | /* Number of elements allocated for line_vector currently. */ | |
124 | ||
125 | static int line_vector_length; | |
126 | ||
d8ce1326 JG |
127 | /* Pointers to scratch storage, used for reading raw symbols and auxents. */ |
128 | ||
129 | static char *temp_sym; | |
130 | static char *temp_aux; | |
131 | ||
132 | /* Local variables that hold the shift and mask values for the | |
133 | COFF file that we are currently reading. These come back to us | |
134 | from BFD, and are referenced by their macro names, as well as | |
135 | internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF | |
136 | macros from ../internalcoff.h . */ | |
137 | ||
138 | static unsigned local_n_btmask; | |
139 | static unsigned local_n_btshft; | |
140 | static unsigned local_n_tmask; | |
141 | static unsigned local_n_tshift; | |
142 | ||
143 | #define N_BTMASK local_n_btmask | |
144 | #define N_BTSHFT local_n_btshft | |
145 | #define N_TMASK local_n_tmask | |
146 | #define N_TSHIFT local_n_tshift | |
147 | ||
148 | /* Local variables that hold the sizes in the file of various COFF structures. | |
149 | (We only need to know this to read them from the file -- BFD will then | |
150 | translate the data in them, into `internal_xxx' structs in the right | |
151 | byte order, alignment, etc.) */ | |
152 | ||
153 | static unsigned local_linesz; | |
154 | static unsigned local_symesz; | |
155 | static unsigned local_auxesz; | |
156 | ||
157 | ||
bd5635a1 | 158 | #ifdef TDESC |
8aa13b87 | 159 | #include "tdesc.h" |
bd5635a1 RP |
160 | #define SEM |
161 | int int_sem_val = 's' << 24 | 'e' << 16 | 'm' << 8 | '.'; | |
162 | int temp_sem_val; | |
163 | int last_coffsem = 2; | |
8aa13b87 JK |
164 | #if 0 |
165 | /* This isn't used currently. */ | |
bd5635a1 | 166 | int last_coffsyn = 0; |
8aa13b87 | 167 | #endif |
bd5635a1 | 168 | int debug_info = 0; /*used by tdesc */ |
8aa13b87 | 169 | extern dc_dcontext_t tdesc_handle; |
bd5635a1 RP |
170 | extern int safe_to_init_tdesc_context; |
171 | #endif | |
172 | ||
173 | /* Chain of typedefs of pointers to empty struct/union types. | |
174 | They are chained thru the SYMBOL_VALUE_CHAIN. */ | |
175 | ||
176 | #define HASHSIZE 127 | |
177 | static struct symbol *opaque_type_chain[HASHSIZE]; | |
178 | ||
179 | /* Record the symbols defined for each context in a list. | |
180 | We don't create a struct block for the context until we | |
181 | know how long to make it. */ | |
182 | ||
183 | struct pending | |
184 | { | |
185 | struct pending *next; | |
186 | struct symbol *symbol; | |
187 | }; | |
188 | ||
189 | /* Here are the three lists that symbols are put on. */ | |
190 | ||
191 | struct pending *file_symbols; /* static at top level, and types */ | |
192 | ||
193 | struct pending *global_symbols; /* global functions and variables */ | |
194 | ||
195 | struct pending *local_symbols; /* everything local to lexical context */ | |
196 | ||
197 | /* List of unclosed lexical contexts | |
198 | (that will become blocks, eventually). */ | |
199 | ||
200 | struct context_stack | |
201 | { | |
202 | struct context_stack *next; | |
203 | struct pending *locals; | |
204 | struct pending_block *old_blocks; | |
205 | struct symbol *name; | |
206 | CORE_ADDR start_addr; | |
207 | int depth; | |
208 | }; | |
209 | ||
210 | struct context_stack *context_stack; | |
211 | ||
212 | /* Nonzero if within a function (so symbols should be local, | |
213 | if nothing says specifically). */ | |
214 | ||
215 | int within_function; | |
216 | ||
d8ce1326 JG |
217 | #if 0 |
218 | /* The type of the function we are currently reading in. This is | |
219 | used by define_symbol to record the type of arguments to a function. */ | |
220 | ||
221 | struct type *in_function_type; | |
222 | #endif | |
223 | ||
bd5635a1 RP |
224 | /* List of blocks already made (lexical contexts already closed). |
225 | This is used at the end to make the blockvector. */ | |
226 | ||
227 | struct pending_block | |
228 | { | |
229 | struct pending_block *next; | |
230 | struct block *block; | |
231 | }; | |
232 | ||
233 | struct pending_block *pending_blocks; | |
234 | ||
235 | extern CORE_ADDR startup_file_start; /* From blockframe.c */ | |
236 | extern CORE_ADDR startup_file_end; /* From blockframe.c */ | |
237 | ||
238 | /* Complaints about various problems in the file being read */ | |
239 | ||
240 | struct complaint ef_complaint = | |
241 | {"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0}; | |
242 | ||
63989338 JG |
243 | struct complaint lineno_complaint = |
244 | {"Line number pointer %d lower than start of line numbers", 0, 0}; | |
245 | ||
bd5635a1 RP |
246 | \f |
247 | /* Look up a coff type-number index. Return the address of the slot | |
248 | where the type for that index is stored. | |
249 | The type-number is in INDEX. | |
250 | ||
251 | This can be used for finding the type associated with that index | |
252 | or for associating a new type with the index. */ | |
253 | ||
254 | static struct type ** | |
255 | coff_lookup_type (index) | |
256 | register int index; | |
257 | { | |
258 | if (index >= type_vector_length) | |
259 | { | |
260 | int old_vector_length = type_vector_length; | |
261 | ||
262 | type_vector_length *= 2; | |
263 | if (type_vector_length < index) { | |
264 | type_vector_length = index * 2; | |
265 | } | |
159a075e SG |
266 | type_vector = (struct type **) |
267 | xrealloc (type_vector, type_vector_length * sizeof (struct type *)); | |
268 | bzero (&type_vector[old_vector_length], | |
bd5635a1 RP |
269 | (type_vector_length - old_vector_length) * sizeof(struct type *)); |
270 | } | |
159a075e | 271 | return &type_vector[index]; |
bd5635a1 RP |
272 | } |
273 | ||
274 | /* Make sure there is a type allocated for type number index | |
275 | and return the type object. | |
276 | This can create an empty (zeroed) type object. */ | |
277 | ||
278 | static struct type * | |
279 | coff_alloc_type (index) | |
280 | int index; | |
281 | { | |
282 | register struct type **type_addr = coff_lookup_type (index); | |
283 | register struct type *type = *type_addr; | |
284 | ||
285 | /* If we are referring to a type not known at all yet, | |
286 | allocate an empty type for it. | |
287 | We will fill it in later if we find out how. */ | |
288 | if (type == 0) | |
289 | { | |
290 | type = (struct type *) obstack_alloc (symbol_obstack, | |
291 | sizeof (struct type)); | |
292 | bzero (type, sizeof (struct type)); | |
159a075e | 293 | TYPE_VPTR_FIELDNO (type) = -1; |
bd5635a1 RP |
294 | *type_addr = type; |
295 | } | |
296 | return type; | |
297 | } | |
298 | \f | |
299 | /* maintain the lists of symbols and blocks */ | |
300 | ||
301 | /* Add a symbol to one of the lists of symbols. */ | |
302 | static void | |
303 | add_symbol_to_list (symbol, listhead) | |
304 | struct symbol *symbol; | |
305 | struct pending **listhead; | |
306 | { | |
307 | register struct pending *link | |
308 | = (struct pending *) xmalloc (sizeof (struct pending)); | |
309 | ||
310 | link->next = *listhead; | |
311 | link->symbol = symbol; | |
312 | *listhead = link; | |
313 | } | |
314 | ||
315 | /* Take one of the lists of symbols and make a block from it. | |
316 | Put the block on the list of pending blocks. */ | |
317 | ||
318 | static void | |
319 | finish_block (symbol, listhead, old_blocks, start, end) | |
320 | struct symbol *symbol; | |
321 | struct pending **listhead; | |
322 | struct pending_block *old_blocks; | |
323 | CORE_ADDR start, end; | |
324 | { | |
325 | register struct pending *next, *next1; | |
326 | register struct block *block; | |
327 | register struct pending_block *pblock; | |
328 | struct pending_block *opblock; | |
329 | register int i; | |
330 | ||
331 | /* Count the length of the list of symbols. */ | |
332 | ||
333 | for (next = *listhead, i = 0; next; next = next->next, i++); | |
334 | ||
335 | block = (struct block *) | |
336 | obstack_alloc (symbol_obstack, sizeof (struct block) + (i - 1) * sizeof (struct symbol *)); | |
337 | ||
338 | /* Copy the symbols into the block. */ | |
339 | ||
340 | BLOCK_NSYMS (block) = i; | |
341 | for (next = *listhead; next; next = next->next) | |
342 | BLOCK_SYM (block, --i) = next->symbol; | |
343 | ||
344 | BLOCK_START (block) = start; | |
345 | BLOCK_END (block) = end; | |
346 | BLOCK_SUPERBLOCK (block) = 0; /* Filled in when containing block is made */ | |
347 | ||
348 | /* Put the block in as the value of the symbol that names it. */ | |
349 | ||
350 | if (symbol) | |
351 | { | |
352 | SYMBOL_BLOCK_VALUE (symbol) = block; | |
353 | BLOCK_FUNCTION (block) = symbol; | |
354 | } | |
355 | else | |
356 | BLOCK_FUNCTION (block) = 0; | |
357 | ||
358 | /* Now free the links of the list, and empty the list. */ | |
359 | ||
360 | for (next = *listhead; next; next = next1) | |
361 | { | |
362 | next1 = next->next; | |
363 | free (next); | |
364 | } | |
365 | *listhead = 0; | |
366 | ||
367 | /* Install this block as the superblock | |
368 | of all blocks made since the start of this scope | |
369 | that don't have superblocks yet. */ | |
370 | ||
371 | opblock = 0; | |
372 | for (pblock = pending_blocks; pblock != old_blocks; pblock = pblock->next) | |
373 | { | |
374 | if (BLOCK_SUPERBLOCK (pblock->block) == 0) | |
375 | BLOCK_SUPERBLOCK (pblock->block) = block; | |
376 | opblock = pblock; | |
377 | } | |
378 | ||
379 | /* Record this block on the list of all blocks in the file. | |
380 | Put it after opblock, or at the beginning if opblock is 0. | |
381 | This puts the block in the list after all its subblocks. */ | |
382 | ||
383 | pblock = (struct pending_block *) xmalloc (sizeof (struct pending_block)); | |
384 | pblock->block = block; | |
385 | if (opblock) | |
386 | { | |
387 | pblock->next = opblock->next; | |
388 | opblock->next = pblock; | |
389 | } | |
390 | else | |
391 | { | |
392 | pblock->next = pending_blocks; | |
393 | pending_blocks = pblock; | |
394 | } | |
395 | } | |
396 | ||
397 | static struct blockvector * | |
398 | make_blockvector () | |
399 | { | |
400 | register struct pending_block *next, *next1; | |
401 | register struct blockvector *blockvector; | |
402 | register int i; | |
403 | ||
404 | /* Count the length of the list of blocks. */ | |
405 | ||
406 | for (next = pending_blocks, i = 0; next; next = next->next, i++); | |
407 | ||
408 | blockvector = (struct blockvector *) | |
409 | obstack_alloc (symbol_obstack, sizeof (struct blockvector) + (i - 1) * sizeof (struct block *)); | |
410 | ||
411 | /* Copy the blocks into the blockvector. | |
412 | This is done in reverse order, which happens to put | |
413 | the blocks into the proper order (ascending starting address). | |
414 | finish_block has hair to insert each block into the list | |
415 | after its subblocks in order to make sure this is true. */ | |
416 | ||
417 | BLOCKVECTOR_NBLOCKS (blockvector) = i; | |
418 | for (next = pending_blocks; next; next = next->next) | |
419 | BLOCKVECTOR_BLOCK (blockvector, --i) = next->block; | |
420 | ||
421 | /* Now free the links of the list, and empty the list. */ | |
422 | ||
423 | for (next = pending_blocks; next; next = next1) | |
424 | { | |
425 | next1 = next->next; | |
426 | free (next); | |
427 | } | |
428 | pending_blocks = 0; | |
429 | ||
430 | return blockvector; | |
431 | } | |
432 | ||
433 | /* Manage the vector of line numbers. */ | |
434 | ||
e1ce8aa5 | 435 | static void |
bd5635a1 RP |
436 | record_line (line, pc) |
437 | int line; | |
438 | CORE_ADDR pc; | |
439 | { | |
440 | struct linetable_entry *e; | |
441 | /* Make sure line vector is big enough. */ | |
442 | ||
443 | if (line_vector_index + 2 >= line_vector_length) | |
444 | { | |
445 | line_vector_length *= 2; | |
446 | line_vector = (struct linetable *) | |
447 | xrealloc (line_vector, sizeof (struct linetable) | |
448 | + (line_vector_length | |
449 | * sizeof (struct linetable_entry))); | |
450 | } | |
451 | ||
452 | e = line_vector->item + line_vector_index++; | |
453 | e->line = line; e->pc = pc; | |
454 | } | |
455 | \f | |
456 | /* Start a new symtab for a new source file. | |
457 | This is called when a COFF ".file" symbol is seen; | |
458 | it indicates the start of data for one original source file. */ | |
459 | ||
460 | static void | |
461 | start_symtab () | |
462 | { | |
463 | file_symbols = 0; | |
464 | global_symbols = 0; | |
465 | context_stack = 0; | |
466 | within_function = 0; | |
467 | last_source_file = 0; | |
468 | #ifdef TDESC | |
469 | last_coffsem = 2; | |
8aa13b87 JK |
470 | #if 0 |
471 | /* This isn't used currently. */ | |
bd5635a1 | 472 | last_coffsyn = 0; |
8aa13b87 | 473 | #endif |
bd5635a1 RP |
474 | #endif |
475 | ||
cadbb07a | 476 | /* Initialize the source file line number information for this file. */ |
bd5635a1 | 477 | |
cadbb07a JG |
478 | if (line_vector) /* Unlikely, but maybe possible? */ |
479 | free (line_vector); | |
bd5635a1 RP |
480 | line_vector_index = 0; |
481 | line_vector_length = 1000; | |
482 | prev_line_number = -2; /* Force first line number to be explicit */ | |
483 | line_vector = (struct linetable *) | |
484 | xmalloc (sizeof (struct linetable) | |
485 | + line_vector_length * sizeof (struct linetable_entry)); | |
486 | } | |
487 | ||
488 | /* Save the vital information from when starting to read a file, | |
489 | for use when closing off the current file. | |
490 | NAME is the file name the symbols came from, START_ADDR is the first | |
491 | text address for the file, and SIZE is the number of bytes of text. */ | |
492 | ||
493 | static void | |
494 | complete_symtab (name, start_addr, size) | |
495 | char *name; | |
496 | CORE_ADDR start_addr; | |
497 | unsigned int size; | |
498 | { | |
499 | last_source_file = savestring (name, strlen (name)); | |
500 | cur_src_start_addr = start_addr; | |
501 | cur_src_end_addr = start_addr + size; | |
502 | ||
503 | if (entry_point < cur_src_end_addr | |
504 | && entry_point >= cur_src_start_addr) | |
505 | { | |
506 | startup_file_start = cur_src_start_addr; | |
507 | startup_file_end = cur_src_end_addr; | |
508 | } | |
509 | } | |
510 | ||
511 | /* Finish the symbol definitions for one main source file, | |
512 | close off all the lexical contexts for that file | |
513 | (creating struct block's for them), then make the | |
514 | struct symtab for that file and put it in the list of all such. */ | |
515 | ||
516 | static void | |
517 | end_symtab () | |
518 | { | |
519 | register struct symtab *symtab; | |
520 | register struct context_stack *cstk; | |
521 | register struct blockvector *blockvector; | |
522 | register struct linetable *lv; | |
523 | ||
524 | /* Finish the lexical context of the last function in the file. */ | |
525 | ||
526 | if (context_stack) | |
527 | { | |
528 | cstk = context_stack; | |
529 | context_stack = 0; | |
530 | /* Make a block for the local symbols within. */ | |
531 | finish_block (cstk->name, &local_symbols, cstk->old_blocks, | |
532 | cstk->start_addr, cur_src_end_addr); | |
533 | free (cstk); | |
534 | } | |
535 | ||
536 | /* Ignore a file that has no functions with real debugging info. */ | |
537 | if (pending_blocks == 0 && file_symbols == 0 && global_symbols == 0) | |
538 | { | |
539 | free (line_vector); | |
540 | line_vector = 0; | |
541 | line_vector_length = -1; | |
542 | last_source_file = 0; | |
543 | return; | |
544 | } | |
545 | ||
a6e2b424 JG |
546 | /* Create the two top-level blocks for this file (STATIC_BLOCK and |
547 | GLOBAL_BLOCK). */ | |
bd5635a1 RP |
548 | finish_block (0, &file_symbols, 0, cur_src_start_addr, cur_src_end_addr); |
549 | finish_block (0, &global_symbols, 0, cur_src_start_addr, cur_src_end_addr); | |
550 | ||
551 | /* Create the blockvector that points to all the file's blocks. */ | |
552 | blockvector = make_blockvector (); | |
553 | ||
554 | /* Now create the symtab object for this source file. */ | |
d8ce1326 | 555 | symtab = allocate_symtab (last_source_file); |
bd5635a1 RP |
556 | |
557 | /* Fill in its components. */ | |
558 | symtab->blockvector = blockvector; | |
559 | symtab->free_code = free_linetable; | |
d8ce1326 | 560 | symtab->free_ptr = 0; |
bd5635a1 | 561 | symtab->filename = last_source_file; |
b203fc18 | 562 | symtab->dirname = NULL; |
bd5635a1 RP |
563 | lv = line_vector; |
564 | lv->nitems = line_vector_index; | |
565 | symtab->linetable = (struct linetable *) | |
566 | xrealloc (lv, (sizeof (struct linetable) | |
567 | + lv->nitems * sizeof (struct linetable_entry))); | |
b203fc18 | 568 | |
bd5635a1 RP |
569 | #ifdef TDESC |
570 | symtab->coffsem = last_coffsem; | |
8aa13b87 JK |
571 | #if 0 |
572 | /* This isn't used currently. Besides, if this is really about "syntax", | |
573 | it shouldn't need to stick around past symbol read-in time. */ | |
bd5635a1 | 574 | symtab->coffsyn = last_coffsyn; |
8aa13b87 | 575 | #endif |
bd5635a1 RP |
576 | #endif |
577 | ||
a6e2b424 JG |
578 | free_named_symtabs (symtab->filename); |
579 | ||
bd5635a1 RP |
580 | /* Link the new symtab into the list of such. */ |
581 | symtab->next = symtab_list; | |
582 | symtab_list = symtab; | |
583 | ||
584 | /* Reinitialize for beginning of new file. */ | |
585 | line_vector = 0; | |
586 | line_vector_length = -1; | |
587 | last_source_file = 0; | |
588 | } | |
589 | \f | |
590 | static void | |
591 | record_misc_function (name, address) | |
592 | char *name; | |
593 | CORE_ADDR address; | |
594 | { | |
595 | #ifdef TDESC | |
596 | /* We don't want TDESC entry points on the misc_function_vector */ | |
597 | if (name[0] == '@') return; | |
598 | #endif | |
599 | /* mf_text isn't true, but apparently COFF doesn't tell us what it really | |
600 | is, so this guess is more useful than mf_unknown. */ | |
601 | prim_record_misc_function (savestring (name, strlen (name)), | |
602 | address, | |
603 | (int)mf_text); | |
604 | } | |
605 | \f | |
606 | /* coff_symfile_init () | |
607 | is the coff-specific initialization routine for reading symbols. | |
608 | It is passed a struct sym_fns which contains, among other things, | |
609 | the BFD for the file whose symbols are being read, and a slot for | |
610 | a pointer to "private data" which we fill with cookies and other | |
611 | treats for coff_symfile_read (). | |
612 | ||
613 | We will only be called if this is a COFF or COFF-like file. | |
614 | BFD handles figuring out the format of the file, and code in symtab.c | |
615 | uses BFD's determination to vector to us. | |
616 | ||
617 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ | |
618 | ||
619 | struct coff_symfile_info { | |
620 | file_ptr min_lineno_offset; /* Where in file lowest line#s are */ | |
621 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ | |
622 | }; | |
623 | ||
d8ce1326 JG |
624 | static int text_bfd_scnum; |
625 | ||
9bba3334 | 626 | static void |
bd5635a1 RP |
627 | coff_symfile_init (sf) |
628 | struct sym_fns *sf; | |
629 | { | |
d8ce1326 | 630 | asection *section; |
bd5635a1 RP |
631 | bfd *abfd = sf->sym_bfd; |
632 | ||
633 | /* Allocate struct to keep track of the symfile */ | |
634 | /* FIXME memory leak */ | |
635 | sf->sym_private = xmalloc (sizeof (struct coff_symfile_info)); | |
636 | ||
637 | #if defined (TDESC) | |
638 | safe_to_init_tdesc_context = 0; | |
639 | #endif | |
640 | ||
641 | /* Save startup file's range of PC addresses to help blockframe.c | |
642 | decide where the bottom of the stack is. */ | |
643 | if (bfd_get_file_flags (abfd) & EXEC_P) | |
644 | { | |
645 | /* Executable file -- record its entry point so we'll recognize | |
646 | the startup file because it contains the entry point. */ | |
647 | entry_point = bfd_get_start_address (abfd); | |
648 | } | |
649 | else | |
650 | { | |
651 | /* Examination of non-executable.o files. Short-circuit this stuff. */ | |
652 | /* ~0 will not be in any file, we hope. */ | |
653 | entry_point = ~0; | |
654 | /* set the startup file to be an empty range. */ | |
655 | startup_file_start = 0; | |
656 | startup_file_end = 0; | |
657 | } | |
d8ce1326 JG |
658 | /* Save the section number for the text section */ |
659 | if (section = bfd_get_section_by_name(abfd,".text")) | |
660 | text_bfd_scnum = section->index; | |
661 | else | |
662 | text_bfd_scnum = -1; | |
bd5635a1 RP |
663 | } |
664 | ||
665 | /* This function is called for every section; it finds the outer limits | |
666 | of the line table (minimum and maximum file offset) so that the | |
667 | mainline code can read the whole thing for efficiency. */ | |
668 | ||
e1ce8aa5 | 669 | /* ARGSUSED */ |
bd5635a1 RP |
670 | static void |
671 | find_linenos (abfd, asect, vpinfo) | |
672 | bfd *abfd; | |
673 | sec_ptr asect; | |
674 | void *vpinfo; | |
675 | { | |
676 | struct coff_symfile_info *info; | |
677 | int size, count; | |
678 | file_ptr offset, maxoff; | |
679 | ||
680 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
681 | count = asect->lineno_count; | |
682 | /* End of warning */ | |
683 | ||
684 | if (count == 0) | |
685 | return; | |
d8ce1326 | 686 | size = count * local_linesz; |
bd5635a1 RP |
687 | |
688 | info = (struct coff_symfile_info *)vpinfo; | |
689 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
690 | offset = asect->line_filepos; | |
691 | /* End of warning */ | |
692 | ||
693 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) | |
694 | info->min_lineno_offset = offset; | |
695 | ||
696 | maxoff = offset + size; | |
697 | if (maxoff > info->max_lineno_offset) | |
698 | info->max_lineno_offset = maxoff; | |
8aa13b87 JK |
699 | #ifdef TDESC |
700 | /* While we're at it, find the debug_info. It's in the s_relptr | |
701 | (or, in BFD-speak, rel_filepos) of the text segment section header. */ | |
702 | if (strcmp (bfd_section_name (abfd, asect), ".text") == 0) | |
703 | { | |
704 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
705 | debug_info = asect->rel_filepos; | |
706 | /* End of warning */ | |
707 | if (tdesc_handle) | |
708 | { | |
709 | dc_terminate (tdesc_handle); | |
710 | tdesc_handle = 0; | |
711 | } | |
712 | } | |
713 | #endif /* TDESC */ | |
bd5635a1 RP |
714 | } |
715 | ||
716 | ||
e1ce8aa5 JK |
717 | /* The BFD for this file -- only good while we're actively reading |
718 | symbols into a psymtab or a symtab. */ | |
719 | ||
720 | static bfd *symfile_bfd; | |
721 | ||
bd5635a1 RP |
722 | /* Read a symbol file, after initialization by coff_symfile_init. */ |
723 | /* FIXME! Addr and Mainline are not used yet -- this will not work for | |
724 | shared libraries or add_file! */ | |
725 | ||
61a7292f | 726 | /* ARGSUSED */ |
9bba3334 | 727 | static void |
bd5635a1 RP |
728 | coff_symfile_read (sf, addr, mainline) |
729 | struct sym_fns *sf; | |
730 | CORE_ADDR addr; | |
731 | int mainline; | |
732 | { | |
733 | struct coff_symfile_info *info = (struct coff_symfile_info *)sf->sym_private; | |
734 | bfd *abfd = sf->sym_bfd; | |
d8ce1326 | 735 | coff_data_type *cdata = coff_data (abfd); |
bd5635a1 RP |
736 | char *name = bfd_get_filename (abfd); |
737 | int desc; | |
738 | register int val; | |
739 | int num_symbols; | |
740 | int symtab_offset; | |
741 | int stringtab_offset; | |
742 | ||
743 | symfile_bfd = abfd; /* Kludge for swap routines */ | |
744 | ||
745 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
d8ce1326 | 746 | desc = fileno ((FILE *)(abfd->iostream)); /* File descriptor */ |
bd5635a1 | 747 | num_symbols = bfd_get_symcount (abfd); /* How many syms */ |
d8ce1326 JG |
748 | symtab_offset = cdata->sym_filepos; /* Symbol table file offset */ |
749 | stringtab_offset = symtab_offset + /* String table file offset */ | |
750 | num_symbols * cdata->local_symesz; | |
751 | ||
752 | /* Set a few file-statics that give us specific information about | |
753 | the particular COFF file format we're reading. */ | |
754 | local_linesz = cdata->local_linesz; | |
755 | local_n_btmask = cdata->local_n_btmask; | |
756 | local_n_btshft = cdata->local_n_btshft; | |
757 | local_n_tmask = cdata->local_n_tmask; | |
758 | local_n_tshift = cdata->local_n_tshift; | |
759 | local_linesz = cdata->local_linesz; | |
760 | local_symesz = cdata->local_symesz; | |
761 | local_auxesz = cdata->local_auxesz; | |
762 | ||
763 | /* Allocate space for raw symbol and aux entries, based on their | |
764 | space requirements as reported by BFD. */ | |
765 | temp_sym = (char *) xmalloc | |
766 | (cdata->local_symesz + cdata->local_auxesz); | |
767 | temp_aux = temp_sym + cdata->local_symesz; | |
768 | make_cleanup (free_current_contents, &temp_sym); | |
bd5635a1 RP |
769 | /* End of warning */ |
770 | ||
bd5635a1 RP |
771 | /* Read the line number table, all at once. */ |
772 | info->min_lineno_offset = 0; | |
773 | info->max_lineno_offset = 0; | |
774 | bfd_map_over_sections (abfd, find_linenos, info); | |
775 | ||
776 | val = init_lineno (desc, info->min_lineno_offset, | |
777 | info->max_lineno_offset - info->min_lineno_offset); | |
778 | if (val < 0) | |
779 | error ("\"%s\": error reading line numbers\n", name); | |
780 | ||
781 | /* Now read the string table, all at once. */ | |
782 | ||
783 | val = init_stringtab (desc, stringtab_offset); | |
784 | if (val < 0) | |
785 | { | |
786 | free_all_symtabs (); /* FIXME blows whole symtab */ | |
787 | printf ("\"%s\": can't get string table", name); | |
788 | fflush (stdout); | |
789 | return; | |
790 | } | |
791 | make_cleanup (free_stringtab, 0); | |
792 | ||
793 | /* Position to read the symbol table. Do not read it all at once. */ | |
794 | val = lseek (desc, (long)symtab_offset, 0); | |
795 | if (val < 0) | |
796 | perror_with_name (name); | |
797 | ||
798 | init_misc_bunches (); | |
799 | make_cleanup (discard_misc_bunches, 0); | |
800 | ||
801 | /* Now that the executable file is positioned at symbol table, | |
802 | process it and define symbols accordingly. */ | |
803 | ||
804 | read_coff_symtab (desc, num_symbols); | |
805 | ||
806 | patch_opaque_types (); | |
807 | ||
808 | /* Sort symbols alphabetically within each block. */ | |
809 | ||
810 | sort_all_symtab_syms (); | |
811 | ||
812 | /* Go over the misc symbol bunches and install them in vector. */ | |
813 | ||
61a7292f | 814 | condense_misc_bunches (!mainline); |
bd5635a1 RP |
815 | |
816 | /* Make a default for file to list. */ | |
817 | ||
818 | select_source_symtab (0); /* FIXME, this might be too slow, see dbxread */ | |
819 | } | |
820 | ||
9bba3334 | 821 | static void |
bd5635a1 RP |
822 | coff_new_init () |
823 | { | |
824 | /* There seems to be nothing to do except free_all_symtabs and set | |
825 | symfile to zero, which is done by our caller. */ | |
826 | } | |
827 | \f | |
828 | /* Simplified internal version of coff symbol table information */ | |
829 | ||
830 | struct coff_symbol { | |
831 | char *c_name; | |
832 | int c_symnum; /* symbol number of this entry */ | |
833 | int c_nsyms; /* 1 if syment only, 2 if syment + auxent, etc */ | |
834 | long c_value; | |
835 | int c_sclass; | |
836 | int c_secnum; | |
837 | unsigned int c_type; | |
838 | }; | |
839 | ||
840 | /* Given pointers to a symbol table in coff style exec file, | |
841 | analyze them and create struct symtab's describing the symbols. | |
842 | NSYMS is the number of symbols in the symbol table. | |
843 | We read them one at a time using read_one_sym (). */ | |
844 | ||
845 | static void | |
846 | read_coff_symtab (desc, nsyms) | |
847 | int desc; | |
848 | int nsyms; | |
849 | { | |
850 | int newfd; /* Avoid multiple closes on same desc */ | |
851 | FILE *stream; | |
852 | register struct context_stack *new; | |
853 | struct coff_symbol coff_symbol; | |
854 | register struct coff_symbol *cs = &coff_symbol; | |
dcc35536 JG |
855 | static struct internal_syment main_sym; |
856 | static union internal_auxent main_aux; | |
bd5635a1 | 857 | struct coff_symbol fcn_cs_saved; |
dcc35536 JG |
858 | static struct internal_syment fcn_sym_saved; |
859 | static union internal_auxent fcn_aux_saved; | |
bd5635a1 RP |
860 | |
861 | /* A .file is open. */ | |
862 | int in_source_file = 0; | |
863 | int num_object_files = 0; | |
864 | int next_file_symnum = -1; | |
865 | ||
866 | /* Name of the current file. */ | |
867 | char *filestring = ""; | |
868 | int depth; | |
869 | int fcn_first_line; | |
870 | int fcn_last_line; | |
871 | int fcn_start_addr; | |
872 | long fcn_line_ptr; | |
873 | struct cleanup *old_chain; | |
874 | ||
875 | ||
876 | newfd = dup (desc); | |
877 | if (newfd == -1) | |
878 | fatal ("Too many open files"); | |
879 | stream = fdopen (newfd, "r"); | |
880 | ||
881 | old_chain = make_cleanup (free_all_symtabs, 0); | |
882 | make_cleanup (fclose, stream); | |
883 | nlist_stream_global = stream; | |
884 | nlist_nsyms_global = nsyms; | |
885 | last_source_file = 0; | |
886 | bzero (opaque_type_chain, sizeof opaque_type_chain); | |
887 | ||
cadbb07a JG |
888 | if (type_vector) /* Get rid of previous one */ |
889 | free (type_vector); | |
bd5635a1 | 890 | type_vector_length = 160; |
159a075e SG |
891 | type_vector = (struct type **) |
892 | xmalloc (type_vector_length * sizeof (struct type *)); | |
893 | bzero (type_vector, type_vector_length * sizeof (struct type *)); | |
bd5635a1 RP |
894 | |
895 | start_symtab (); | |
896 | ||
897 | symnum = 0; | |
898 | while (symnum < nsyms) | |
899 | { | |
900 | QUIT; /* Make this command interruptable. */ | |
901 | read_one_sym (cs, &main_sym, &main_aux); | |
902 | ||
903 | #ifdef SEM | |
904 | temp_sem_val = cs->c_name[0] << 24 | cs->c_name[1] << 16 | | |
905 | cs->c_name[2] << 8 | cs->c_name[3]; | |
906 | if (int_sem_val == temp_sem_val) | |
907 | last_coffsem = (int) strtol (cs->c_name+4, (char **) NULL, 10); | |
908 | #endif | |
909 | ||
910 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) | |
911 | { | |
912 | if (last_source_file) | |
913 | end_symtab (); | |
914 | ||
915 | start_symtab (); | |
916 | complete_symtab ("_globals_", 0, first_object_file_end); | |
917 | /* done with all files, everything from here on out is globals */ | |
918 | } | |
919 | ||
920 | /* Special case for file with type declarations only, no text. */ | |
8714ff35 JK |
921 | if (!last_source_file && SDB_TYPE (cs->c_type) |
922 | && cs->c_secnum == N_DEBUG) | |
bd5635a1 RP |
923 | complete_symtab (filestring, 0, 0); |
924 | ||
925 | /* Typedefs should not be treated as symbol definitions. */ | |
926 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) | |
927 | { | |
928 | /* record as misc function. if we get '.bf' next, | |
929 | * then we undo this step | |
930 | */ | |
931 | record_misc_function (cs->c_name, cs->c_value); | |
932 | ||
933 | fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; | |
934 | fcn_start_addr = cs->c_value; | |
935 | fcn_cs_saved = *cs; | |
936 | fcn_sym_saved = main_sym; | |
937 | fcn_aux_saved = main_aux; | |
938 | continue; | |
939 | } | |
940 | ||
941 | switch (cs->c_sclass) | |
942 | { | |
943 | case C_EFCN: | |
944 | case C_EXTDEF: | |
945 | case C_ULABEL: | |
946 | case C_USTATIC: | |
947 | case C_LINE: | |
948 | case C_ALIAS: | |
949 | case C_HIDDEN: | |
950 | printf ("Bad n_sclass = %d\n", cs->c_sclass); | |
951 | break; | |
952 | ||
953 | case C_FILE: | |
954 | /* | |
955 | * c_value field contains symnum of next .file entry in table | |
956 | * or symnum of first global after last .file. | |
957 | */ | |
958 | next_file_symnum = cs->c_value; | |
959 | filestring = getfilename (&main_aux); | |
960 | /* | |
961 | * Complete symbol table for last object file | |
962 | * containing debugging information. | |
963 | */ | |
964 | if (last_source_file) | |
965 | { | |
966 | end_symtab (); | |
967 | start_symtab (); | |
968 | } | |
969 | in_source_file = 1; | |
970 | break; | |
971 | ||
972 | case C_STAT: | |
973 | if (cs->c_name[0] == '.') { | |
d8ce1326 JG |
974 | if (strcmp (cs->c_name, ".text") == 0) { |
975 | /* FIXME: don't wire in ".text" as section name | |
976 | or symbol name! */ | |
bd5635a1 RP |
977 | if (++num_object_files == 1) { |
978 | /* last address of startup file */ | |
979 | first_object_file_end = cs->c_value + | |
980 | main_aux.x_scn.x_scnlen; | |
981 | } | |
982 | /* Check for in_source_file deals with case of | |
983 | a file with debugging symbols | |
984 | followed by a later file with no symbols. */ | |
985 | if (in_source_file) | |
986 | complete_symtab (filestring, cs->c_value, | |
987 | main_aux.x_scn.x_scnlen); | |
988 | in_source_file = 0; | |
989 | } | |
990 | /* flush rest of '.' symbols */ | |
991 | break; | |
992 | } | |
8714ff35 | 993 | else if (!SDB_TYPE (cs->c_type) |
bd5635a1 RP |
994 | && cs->c_name[0] == 'L' |
995 | && (strncmp (cs->c_name, "LI%", 3) == 0 | |
8714ff35 | 996 | || strncmp (cs->c_name, "LF%", 3) == 0 |
bd5635a1 RP |
997 | || strncmp (cs->c_name,"LC%",3) == 0 |
998 | || strncmp (cs->c_name,"LP%",3) == 0 | |
999 | || strncmp (cs->c_name,"LPB%",4) == 0 | |
1000 | || strncmp (cs->c_name,"LBB%",4) == 0 | |
1001 | || strncmp (cs->c_name,"LBE%",4) == 0 | |
1002 | || strncmp (cs->c_name,"LPBX%",5) == 0)) | |
1003 | /* At least on a 3b1, gcc generates swbeg and string labels | |
1004 | that look like this. Ignore them. */ | |
1005 | break; | |
1006 | /* fall in for static symbols that don't start with '.' */ | |
1007 | case C_EXT: | |
8714ff35 | 1008 | if (!SDB_TYPE (cs->c_type)) { |
d8ce1326 JG |
1009 | /* FIXME: This is BOGUS Will Robinson! |
1010 | Coff should provide the SEC_CODE flag for executable sections, | |
1011 | then if we could look up sections by section number we | |
1012 | could see if the flags indicate SEC_CODE. If so, then | |
1013 | record this symbol as a miscellaneous function. But why | |
1014 | are absolute syms recorded as functions, anyway? */ | |
1015 | if (cs->c_secnum <= text_bfd_scnum+1) {/* text or abs */ | |
bd5635a1 RP |
1016 | record_misc_function (cs->c_name, cs->c_value); |
1017 | break; | |
1018 | } else { | |
1019 | cs->c_type = T_INT; | |
1020 | } | |
1021 | } | |
1022 | (void) process_coff_symbol (cs, &main_aux); | |
1023 | break; | |
1024 | ||
1025 | case C_FCN: | |
1026 | if (strcmp (cs->c_name, ".bf") == 0) | |
1027 | { | |
1028 | within_function = 1; | |
1029 | ||
1030 | /* value contains address of first non-init type code */ | |
1031 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1032 | contains line number of '{' } */ | |
1033 | fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1034 | ||
1035 | new = (struct context_stack *) | |
1036 | xmalloc (sizeof (struct context_stack)); | |
1037 | new->depth = depth = 0; | |
1038 | new->next = 0; | |
1039 | context_stack = new; | |
1040 | new->locals = 0; | |
1041 | new->old_blocks = pending_blocks; | |
1042 | new->start_addr = fcn_start_addr; | |
1043 | fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); | |
1044 | new->name = process_coff_symbol (&fcn_cs_saved, | |
1045 | &fcn_aux_saved); | |
1046 | } | |
1047 | else if (strcmp (cs->c_name, ".ef") == 0) | |
1048 | { | |
1049 | /* the value of .ef is the address of epilogue code; | |
1050 | * not useful for gdb | |
1051 | */ | |
1052 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1053 | contains number of lines to '}' */ | |
1054 | new = context_stack; | |
1055 | if (new == 0) | |
1056 | { | |
1057 | complain (&ef_complaint, cs->c_symnum); | |
1058 | within_function = 0; | |
1059 | break; | |
1060 | } | |
1061 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1062 | enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line); | |
1063 | ||
1064 | finish_block (new->name, &local_symbols, new->old_blocks, | |
1065 | new->start_addr, | |
1066 | #if defined (FUNCTION_EPILOGUE_SIZE) | |
1067 | /* This macro should be defined only on | |
1068 | machines where the | |
1069 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
1070 | field is always zero. | |
1071 | So use the .bf record information that | |
1072 | points to the epilogue and add the size | |
1073 | of the epilogue. */ | |
1074 | cs->c_value + FUNCTION_EPILOGUE_SIZE | |
1075 | #else | |
1076 | fcn_cs_saved.c_value + | |
1077 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
1078 | #endif | |
1079 | ); | |
1080 | context_stack = 0; | |
1081 | within_function = 0; | |
1082 | free (new); | |
1083 | } | |
1084 | break; | |
1085 | ||
1086 | case C_BLOCK: | |
1087 | if (strcmp (cs->c_name, ".bb") == 0) | |
1088 | { | |
1089 | new = (struct context_stack *) | |
1090 | xmalloc (sizeof (struct context_stack)); | |
1091 | depth++; | |
1092 | new->depth = depth; | |
1093 | new->next = context_stack; | |
1094 | context_stack = new; | |
1095 | new->locals = local_symbols; | |
1096 | new->old_blocks = pending_blocks; | |
1097 | new->start_addr = cs->c_value; | |
1098 | new->name = 0; | |
1099 | local_symbols = 0; | |
1100 | } | |
1101 | else if (strcmp (cs->c_name, ".eb") == 0) | |
1102 | { | |
1103 | new = context_stack; | |
1104 | if (new == 0 || depth != new->depth) | |
1105 | error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.", | |
1106 | symnum); | |
1107 | if (local_symbols && context_stack->next) | |
1108 | { | |
1109 | /* Make a block for the local symbols within. */ | |
1110 | finish_block (0, &local_symbols, new->old_blocks, | |
1111 | new->start_addr, cs->c_value); | |
1112 | } | |
1113 | depth--; | |
1114 | local_symbols = new->locals; | |
1115 | context_stack = new->next; | |
1116 | free (new); | |
1117 | } | |
1118 | break; | |
1119 | #ifdef TDESC | |
1120 | case C_VERSION: | |
8aa13b87 JK |
1121 | #if 0 |
1122 | /* This isn't used currently. */ | |
bd5635a1 RP |
1123 | if (strcmp (cs->c_name, ".coffsyn") == 0) |
1124 | last_coffsyn = cs->c_value; | |
8aa13b87 JK |
1125 | else |
1126 | #endif /* 0 */ | |
1127 | if ((strcmp (cs->c_name, ".coffsem") == 0) && | |
bd5635a1 RP |
1128 | (cs->c_value != 0)) |
1129 | last_coffsem = cs->c_value; | |
1130 | break; | |
8aa13b87 | 1131 | #endif /* TDESC */ |
bd5635a1 RP |
1132 | |
1133 | default: | |
1134 | #ifdef TDESC | |
1135 | if ((strcmp (cs->c_name, ".coffsem") == 0) && | |
1136 | (cs->c_value != 0)) | |
1137 | last_coffsem = cs->c_value; | |
1138 | else | |
1139 | #endif | |
1140 | (void) process_coff_symbol (cs, &main_aux); | |
1141 | break; | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | if (last_source_file) | |
1146 | end_symtab (); | |
1147 | fclose (stream); | |
1148 | discard_cleanups (old_chain); | |
1149 | } | |
1150 | \f | |
1151 | /* Routines for reading headers and symbols from executable. */ | |
1152 | ||
1153 | #ifdef FIXME | |
1154 | /* Move these XXXMAGIC symbol defns into BFD! */ | |
1155 | ||
1156 | /* Read COFF file header, check magic number, | |
1157 | and return number of symbols. */ | |
1158 | read_file_hdr (chan, file_hdr) | |
1159 | int chan; | |
1160 | FILHDR *file_hdr; | |
1161 | { | |
1162 | lseek (chan, 0L, 0); | |
1163 | if (myread (chan, (char *)file_hdr, FILHSZ) < 0) | |
1164 | return -1; | |
1165 | ||
1166 | switch (file_hdr->f_magic) | |
1167 | { | |
1168 | #ifdef MC68MAGIC | |
1169 | case MC68MAGIC: | |
1170 | #endif | |
1171 | #ifdef NS32GMAGIC | |
1172 | case NS32GMAGIC: | |
1173 | case NS32SMAGIC: | |
1174 | #endif | |
1175 | #ifdef I386MAGIC | |
1176 | case I386MAGIC: | |
1177 | #endif | |
1178 | #ifdef CLIPPERMAGIC | |
1179 | case CLIPPERMAGIC: | |
1180 | #endif | |
1181 | #if defined (MC68KWRMAGIC) \ | |
1182 | && (!defined (MC68MAGIC) || MC68KWRMAGIC != MC68MAGIC) | |
1183 | case MC68KWRMAGIC: | |
1184 | #endif | |
1185 | #ifdef MC68KROMAGIC | |
1186 | case MC68KROMAGIC: | |
1187 | case MC68KPGMAGIC: | |
1188 | #endif | |
1189 | #ifdef MC88DGMAGIC | |
1190 | case MC88DGMAGIC: | |
1191 | #endif | |
1192 | #ifdef MC88MAGIC | |
1193 | case MC88MAGIC: | |
1194 | #endif | |
1195 | #ifdef I960ROMAGIC | |
1196 | case I960ROMAGIC: /* Intel 960 */ | |
1197 | #endif | |
1198 | #ifdef I960RWMAGIC | |
1199 | case I960RWMAGIC: /* Intel 960 */ | |
1200 | #endif | |
1201 | return file_hdr->f_nsyms; | |
1202 | ||
1203 | default: | |
1204 | #ifdef BADMAG | |
1205 | if (BADMAG(file_hdr)) | |
1206 | return -1; | |
1207 | else | |
1208 | return file_hdr->f_nsyms; | |
1209 | #else | |
1210 | return -1; | |
1211 | #endif | |
1212 | } | |
1213 | } | |
1214 | #endif | |
1215 | ||
dcc35536 JG |
1216 | /* Read the next symbol, swap it, and return it in both internal_syment |
1217 | form, and coff_symbol form. Also return its first auxent, if any, | |
1218 | in internal_auxent form, and skip any other auxents. */ | |
bd5635a1 RP |
1219 | |
1220 | static void | |
1221 | read_one_sym (cs, sym, aux) | |
1222 | register struct coff_symbol *cs; | |
dcc35536 JG |
1223 | register struct internal_syment *sym; |
1224 | register union internal_auxent *aux; | |
bd5635a1 | 1225 | { |
bd5635a1 RP |
1226 | int i; |
1227 | ||
1228 | cs->c_symnum = symnum; | |
d8ce1326 JG |
1229 | fread (temp_sym, local_symesz, 1, nlist_stream_global); |
1230 | bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *)sym); | |
bd5635a1 RP |
1231 | cs->c_nsyms = (sym->n_numaux & 0xff) + 1; |
1232 | if (cs->c_nsyms >= 2) | |
1233 | { | |
d8ce1326 JG |
1234 | fread (temp_aux, local_auxesz, 1, nlist_stream_global); |
1235 | bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass, | |
1236 | (char *)aux); | |
bd5635a1 RP |
1237 | /* If more than one aux entry, read past it (only the first aux |
1238 | is important). */ | |
1239 | for (i = 2; i < cs->c_nsyms; i++) | |
d8ce1326 | 1240 | fread (temp_aux, local_auxesz, 1, nlist_stream_global); |
bd5635a1 RP |
1241 | } |
1242 | cs->c_name = getsymname (sym); | |
1243 | cs->c_value = sym->n_value; | |
1244 | cs->c_sclass = (sym->n_sclass & 0xff); | |
1245 | cs->c_secnum = sym->n_scnum; | |
1246 | cs->c_type = (unsigned) sym->n_type; | |
8714ff35 JK |
1247 | if (!SDB_TYPE (cs->c_type)) |
1248 | cs->c_type = 0; | |
bd5635a1 RP |
1249 | |
1250 | symnum += cs->c_nsyms; | |
1251 | } | |
1252 | \f | |
1253 | /* Support for string table handling */ | |
1254 | ||
1255 | static char *stringtab = NULL; | |
1256 | ||
1257 | static int | |
1258 | init_stringtab (chan, offset) | |
1259 | int chan; | |
1260 | long offset; | |
1261 | { | |
1262 | long length; | |
1263 | int val; | |
1264 | unsigned char lengthbuf[4]; | |
1265 | ||
1266 | if (stringtab) | |
1267 | { | |
1268 | free (stringtab); | |
1269 | stringtab = NULL; | |
1270 | } | |
1271 | ||
1272 | if (lseek (chan, offset, 0) < 0) | |
1273 | return -1; | |
1274 | ||
1275 | val = myread (chan, (char *)lengthbuf, sizeof lengthbuf); | |
dcc35536 | 1276 | length = bfd_h_get_32 (symfile_bfd, lengthbuf); |
bd5635a1 RP |
1277 | |
1278 | /* If no string table is needed, then the file may end immediately | |
1279 | after the symbols. Just return with `stringtab' set to null. */ | |
1280 | if (val != sizeof length || length < sizeof length) | |
1281 | return 0; | |
1282 | ||
1283 | stringtab = (char *) xmalloc (length); | |
1284 | if (stringtab == NULL) | |
1285 | return -1; | |
1286 | ||
1287 | bcopy (&length, stringtab, sizeof length); | |
1288 | if (length == sizeof length) /* Empty table -- just the count */ | |
1289 | return 0; | |
1290 | ||
1291 | val = myread (chan, stringtab + sizeof length, length - sizeof length); | |
1292 | if (val != length - sizeof length || stringtab[length - 1] != '\0') | |
1293 | return -1; | |
1294 | ||
1295 | return 0; | |
1296 | } | |
1297 | ||
1298 | static void | |
1299 | free_stringtab () | |
1300 | { | |
1301 | if (stringtab) | |
1302 | free (stringtab); | |
1303 | stringtab = NULL; | |
1304 | } | |
1305 | ||
1306 | static char * | |
1307 | getsymname (symbol_entry) | |
dcc35536 | 1308 | struct internal_syment *symbol_entry; |
bd5635a1 RP |
1309 | { |
1310 | static char buffer[SYMNMLEN+1]; | |
1311 | char *result; | |
1312 | ||
dcc35536 | 1313 | if (symbol_entry->_n._n_n._n_zeroes == 0) |
bd5635a1 | 1314 | { |
dcc35536 | 1315 | result = stringtab + symbol_entry->_n._n_n._n_offset; |
bd5635a1 RP |
1316 | } |
1317 | else | |
1318 | { | |
dcc35536 | 1319 | strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN); |
bd5635a1 RP |
1320 | buffer[SYMNMLEN] = '\0'; |
1321 | result = buffer; | |
1322 | } | |
1323 | return result; | |
1324 | } | |
1325 | ||
1326 | static char * | |
1327 | getfilename (aux_entry) | |
dcc35536 | 1328 | union internal_auxent *aux_entry; |
bd5635a1 RP |
1329 | { |
1330 | static char buffer[BUFSIZ]; | |
1331 | register char *temp; | |
1332 | char *result; | |
1333 | extern char *rindex (); | |
1334 | ||
1335 | #ifndef COFF_NO_LONG_FILE_NAMES | |
8aa13b87 JK |
1336 | #if defined (x_zeroes) |
1337 | /* Data General. */ | |
1338 | if (aux_entry->x_zeroes == 0) | |
1339 | strcpy (buffer, stringtab + aux_entry->x_offset); | |
1340 | #else /* no x_zeroes */ | |
bd5635a1 RP |
1341 | if (aux_entry->x_file.x_n.x_zeroes == 0) |
1342 | strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); | |
8aa13b87 | 1343 | #endif /* no x_zeroes */ |
bd5635a1 RP |
1344 | else |
1345 | #endif /* COFF_NO_LONG_FILE_NAMES */ | |
1346 | { | |
1347 | #if defined (x_name) | |
1348 | /* Data General. */ | |
1349 | strncpy (buffer, aux_entry->x_name, FILNMLEN); | |
1350 | #else | |
1351 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); | |
1352 | #endif | |
1353 | buffer[FILNMLEN] = '\0'; | |
1354 | } | |
1355 | result = buffer; | |
1356 | if ((temp = rindex (result, '/')) != NULL) | |
1357 | result = temp + 1; | |
1358 | return (result); | |
1359 | } | |
1360 | \f | |
1361 | /* Support for line number handling */ | |
1362 | static char *linetab = NULL; | |
1363 | static long linetab_offset; | |
1364 | static unsigned long linetab_size; | |
1365 | ||
dcc35536 JG |
1366 | /* Read in all the line numbers for fast lookups later. Leave them in |
1367 | external (unswapped) format in memory; we'll swap them as we enter | |
1368 | them into GDB's data structures. */ | |
bd5635a1 RP |
1369 | |
1370 | static int | |
1371 | init_lineno (chan, offset, size) | |
1372 | int chan; | |
1373 | long offset; | |
1374 | int size; | |
1375 | { | |
1376 | int val; | |
bd5635a1 | 1377 | |
61a7292f SG |
1378 | linetab_offset = offset; |
1379 | linetab_size = size; | |
1380 | ||
1381 | if (size == 0) | |
1382 | return 0; | |
1383 | ||
bd5635a1 RP |
1384 | if (lseek (chan, offset, 0) < 0) |
1385 | return -1; | |
1386 | ||
1387 | linetab = (char *) xmalloc (size); | |
1388 | ||
1389 | val = myread (chan, linetab, size); | |
1390 | if (val != size) | |
1391 | return -1; | |
1392 | ||
bd5635a1 RP |
1393 | make_cleanup (free, linetab); /* Be sure it gets de-allocated. */ |
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | #if !defined (L_LNNO32) | |
1398 | #define L_LNNO32(lp) ((lp)->l_lnno) | |
1399 | #endif | |
1400 | ||
1401 | static void | |
1402 | enter_linenos (file_offset, first_line, last_line) | |
1403 | long file_offset; | |
1404 | register int first_line; | |
1405 | register int last_line; | |
1406 | { | |
1407 | register char *rawptr; | |
dcc35536 | 1408 | struct internal_lineno lptr; |
bd5635a1 RP |
1409 | |
1410 | if (file_offset < linetab_offset) | |
1411 | { | |
5594d534 | 1412 | complain (&lineno_complaint, file_offset); |
63989338 JG |
1413 | if (file_offset > linetab_size) /* Too big to be an offset? */ |
1414 | return; | |
1415 | file_offset += linetab_offset; /* Try reading at that linetab offset */ | |
bd5635a1 RP |
1416 | } |
1417 | ||
1418 | rawptr = &linetab[file_offset - linetab_offset]; | |
1419 | ||
1420 | /* skip first line entry for each function */ | |
d8ce1326 | 1421 | rawptr += local_linesz; |
bd5635a1 RP |
1422 | /* line numbers start at one for the first line of the function */ |
1423 | first_line--; | |
1424 | ||
dcc35536 | 1425 | for (;;) { |
d8ce1326 JG |
1426 | bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr); |
1427 | rawptr += local_linesz; | |
dcc35536 | 1428 | if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line) |
bd5635a1 | 1429 | record_line (first_line + L_LNNO32 (&lptr), lptr.l_addr.l_paddr); |
dcc35536 JG |
1430 | else |
1431 | break; | |
1432 | } | |
bd5635a1 RP |
1433 | } |
1434 | \f | |
1435 | static int | |
1436 | hashname (name) | |
1437 | char *name; | |
1438 | { | |
1439 | register char *p = name; | |
1440 | register int total = p[0]; | |
1441 | register int c; | |
1442 | ||
1443 | c = p[1]; | |
1444 | total += c << 2; | |
1445 | if (c) | |
1446 | { | |
1447 | c = p[2]; | |
1448 | total += c << 4; | |
1449 | if (c) | |
1450 | total += p[3] << 6; | |
1451 | } | |
1452 | ||
1453 | return total % HASHSIZE; | |
1454 | } | |
1455 | ||
1456 | static void | |
1457 | patch_type (type, real_type) | |
1458 | struct type *type; | |
1459 | struct type *real_type; | |
1460 | { | |
1461 | register struct type *target = TYPE_TARGET_TYPE (type); | |
1462 | register struct type *real_target = TYPE_TARGET_TYPE (real_type); | |
1463 | int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); | |
1464 | ||
1465 | TYPE_LENGTH (target) = TYPE_LENGTH (real_target); | |
1466 | TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); | |
1467 | TYPE_FIELDS (target) = (struct field *) | |
1468 | obstack_alloc (symbol_obstack, field_size); | |
1469 | ||
1470 | bcopy (TYPE_FIELDS (real_target), TYPE_FIELDS (target), field_size); | |
1471 | ||
1472 | if (TYPE_NAME (real_target)) | |
1473 | { | |
1474 | if (TYPE_NAME (target)) | |
1475 | free (TYPE_NAME (target)); | |
1476 | TYPE_NAME (target) = concat (TYPE_NAME (real_target), "", ""); | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | /* Patch up all appropriate typdef symbols in the opaque_type_chains | |
1481 | so that they can be used to print out opaque data structures properly */ | |
1482 | ||
1483 | static void | |
1484 | patch_opaque_types () | |
1485 | { | |
1486 | struct symtab *s; | |
1487 | ||
1488 | /* Look at each symbol in the per-file block of each symtab. */ | |
1489 | for (s = symtab_list; s; s = s->next) | |
1490 | { | |
1491 | register struct block *b; | |
1492 | register int i; | |
1493 | ||
1494 | /* Go through the per-file symbols only */ | |
a6e2b424 | 1495 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); |
bd5635a1 RP |
1496 | for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--) |
1497 | { | |
1498 | register struct symbol *real_sym; | |
1499 | ||
1500 | /* Find completed typedefs to use to fix opaque ones. | |
1501 | Remove syms from the chain when their types are stored, | |
1502 | but search the whole chain, as there may be several syms | |
1503 | from different files with the same name. */ | |
1504 | real_sym = BLOCK_SYM (b, i); | |
1505 | if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF && | |
1506 | SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE && | |
1507 | TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR && | |
1508 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) | |
1509 | { | |
1510 | register char *name = SYMBOL_NAME (real_sym); | |
1511 | register int hash = hashname (name); | |
1512 | register struct symbol *sym, *prev; | |
1513 | ||
1514 | prev = 0; | |
1515 | for (sym = opaque_type_chain[hash]; sym;) | |
1516 | { | |
1517 | if (name[0] == SYMBOL_NAME (sym)[0] && | |
1518 | !strcmp (name + 1, SYMBOL_NAME (sym) + 1)) | |
1519 | { | |
1520 | if (prev) | |
1521 | SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); | |
1522 | else | |
1523 | opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); | |
1524 | ||
1525 | patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); | |
1526 | ||
1527 | if (prev) | |
1528 | sym = SYMBOL_VALUE_CHAIN (prev); | |
1529 | else | |
1530 | sym = opaque_type_chain[hash]; | |
1531 | } | |
1532 | else | |
1533 | { | |
1534 | prev = sym; | |
1535 | sym = SYMBOL_VALUE_CHAIN (sym); | |
1536 | } | |
1537 | } | |
1538 | } | |
1539 | } | |
1540 | } | |
1541 | } | |
1542 | \f | |
1543 | #if defined (clipper) | |
1544 | #define BELIEVE_PCC_PROMOTION 1 | |
1545 | #endif | |
1546 | ||
1547 | static struct symbol * | |
1548 | process_coff_symbol (cs, aux) | |
1549 | register struct coff_symbol *cs; | |
dcc35536 | 1550 | register union internal_auxent *aux; |
bd5635a1 RP |
1551 | { |
1552 | register struct symbol *sym | |
1553 | = (struct symbol *) obstack_alloc (symbol_obstack, sizeof (struct symbol)); | |
1554 | char *name; | |
1555 | #ifdef NAMES_HAVE_UNDERSCORE | |
1556 | int offset = 1; | |
1557 | #else | |
1558 | int offset = 0; | |
1559 | #endif | |
1560 | ||
1561 | bzero (sym, sizeof (struct symbol)); | |
1562 | name = cs->c_name; | |
1563 | name = (name[0] == '_' ? name + offset : name); | |
1564 | SYMBOL_NAME (sym) = obstack_copy0 (symbol_obstack, name, strlen (name)); | |
1565 | ||
1566 | /* default assumptions */ | |
1567 | SYMBOL_VALUE (sym) = cs->c_value; | |
1568 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1569 | ||
1570 | if (ISFCN (cs->c_type)) | |
1571 | { | |
d8ce1326 JG |
1572 | #if 0 |
1573 | /* FIXME: This has NOT been tested. The DBX version has.. */ | |
1574 | /* Generate a template for the type of this function. The | |
1575 | types of the arguments will be added as we read the symbol | |
1576 | table. */ | |
1577 | struct type *new = (struct type *) | |
1578 | obstack_alloc (symbol_obstack, sizeof (struct type)); | |
1579 | ||
1580 | bcopy(lookup_function_type (decode_function_type (cs, cs->c_type, aux)), | |
1581 | new, sizeof(struct type)); | |
1582 | SYMBOL_TYPE (sym) = new; | |
1583 | in_function_type = SYMBOL_TYPE(sym); | |
1584 | #else | |
1585 | SYMBOL_TYPE(sym) = | |
1586 | lookup_function_type (decode_function_type (cs, cs->c_type, aux)); | |
1587 | #endif | |
1588 | ||
bd5635a1 RP |
1589 | SYMBOL_CLASS (sym) = LOC_BLOCK; |
1590 | if (cs->c_sclass == C_STAT) | |
1591 | add_symbol_to_list (sym, &file_symbols); | |
1592 | else if (cs->c_sclass == C_EXT) | |
1593 | add_symbol_to_list (sym, &global_symbols); | |
1594 | } | |
1595 | else | |
1596 | { | |
1597 | SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux); | |
1598 | switch (cs->c_sclass) | |
1599 | { | |
1600 | case C_NULL: | |
1601 | break; | |
1602 | ||
1603 | case C_AUTO: | |
1604 | SYMBOL_CLASS (sym) = LOC_LOCAL; | |
1605 | add_symbol_to_list (sym, &local_symbols); | |
1606 | break; | |
1607 | ||
1608 | case C_EXT: | |
1609 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1610 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
1611 | add_symbol_to_list (sym, &global_symbols); | |
1612 | break; | |
1613 | ||
1614 | case C_STAT: | |
1615 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1616 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
1617 | if (within_function) { | |
1618 | /* Static symbol of local scope */ | |
1619 | add_symbol_to_list (sym, &local_symbols); | |
1620 | } | |
1621 | else { | |
1622 | /* Static symbol at top level of file */ | |
1623 | add_symbol_to_list (sym, &file_symbols); | |
1624 | } | |
1625 | break; | |
1626 | ||
d8ce1326 JG |
1627 | #ifdef C_GLBLREG /* AMD coff */ |
1628 | case C_GLBLREG: | |
1629 | #endif | |
bd5635a1 RP |
1630 | case C_REG: |
1631 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
d8ce1326 | 1632 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value); |
bd5635a1 RP |
1633 | add_symbol_to_list (sym, &local_symbols); |
1634 | break; | |
1635 | ||
1636 | case C_LABEL: | |
1637 | break; | |
1638 | ||
1639 | case C_ARG: | |
1640 | SYMBOL_CLASS (sym) = LOC_ARG; | |
d8ce1326 JG |
1641 | #if 0 |
1642 | /* FIXME: This has not bee tested. */ | |
1643 | /* Add parameter to function. */ | |
1644 | add_param_to_type(&in_function_type,sym); | |
1645 | #endif | |
bd5635a1 RP |
1646 | add_symbol_to_list (sym, &local_symbols); |
1647 | #if !defined (BELIEVE_PCC_PROMOTION) | |
1648 | /* If PCC says a parameter is a short or a char, | |
1649 | it is really an int. */ | |
1650 | if (SYMBOL_TYPE (sym) == builtin_type_char | |
1651 | || SYMBOL_TYPE (sym) == builtin_type_short) | |
1652 | SYMBOL_TYPE (sym) = builtin_type_int; | |
1653 | else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char | |
1654 | || SYMBOL_TYPE (sym) == builtin_type_unsigned_short) | |
1655 | SYMBOL_TYPE (sym) = builtin_type_unsigned_int; | |
1656 | #endif | |
1657 | break; | |
1658 | ||
1659 | case C_REGPARM: | |
1660 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
d8ce1326 | 1661 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value); |
bd5635a1 RP |
1662 | add_symbol_to_list (sym, &local_symbols); |
1663 | #if !defined (BELIEVE_PCC_PROMOTION) | |
1664 | /* If PCC says a parameter is a short or a char, | |
1665 | it is really an int. */ | |
1666 | if (SYMBOL_TYPE (sym) == builtin_type_char | |
1667 | || SYMBOL_TYPE (sym) == builtin_type_short) | |
1668 | SYMBOL_TYPE (sym) = builtin_type_int; | |
1669 | else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char | |
1670 | || SYMBOL_TYPE (sym) == builtin_type_unsigned_short) | |
1671 | SYMBOL_TYPE (sym) = builtin_type_unsigned_int; | |
1672 | #endif | |
1673 | break; | |
1674 | ||
1675 | case C_TPDEF: | |
1676 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1677 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1678 | ||
1679 | /* If type has no name, give it one */ | |
1680 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0 | |
1681 | && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0) | |
1682 | TYPE_NAME (SYMBOL_TYPE (sym)) | |
1683 | = concat (SYMBOL_NAME (sym), "", ""); | |
1684 | ||
1685 | /* Keep track of any type which points to empty structured type, | |
1686 | so it can be filled from a definition from another file */ | |
1687 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && | |
1688 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0) | |
1689 | { | |
1690 | register int i = hashname (SYMBOL_NAME (sym)); | |
1691 | ||
1692 | SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; | |
1693 | opaque_type_chain[i] = sym; | |
1694 | } | |
1695 | add_symbol_to_list (sym, &file_symbols); | |
1696 | break; | |
1697 | ||
1698 | case C_STRTAG: | |
1699 | case C_UNTAG: | |
1700 | case C_ENTAG: | |
1701 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1702 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
1703 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0 | |
1704 | && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0) | |
1705 | TYPE_NAME (SYMBOL_TYPE (sym)) | |
1706 | = concat ("", | |
1707 | (cs->c_sclass == C_ENTAG | |
1708 | ? "enum " | |
1709 | : (cs->c_sclass == C_STRTAG | |
1710 | ? "struct " : "union ")), | |
1711 | SYMBOL_NAME (sym)); | |
1712 | add_symbol_to_list (sym, &file_symbols); | |
1713 | break; | |
1714 | ||
1715 | default: | |
1716 | break; | |
1717 | } | |
1718 | } | |
1719 | return sym; | |
1720 | } | |
1721 | \f | |
1722 | /* Decode a coff type specifier; | |
1723 | return the type that is meant. */ | |
1724 | ||
1725 | static | |
1726 | struct type * | |
1727 | decode_type (cs, c_type, aux) | |
1728 | register struct coff_symbol *cs; | |
1729 | unsigned int c_type; | |
dcc35536 | 1730 | register union internal_auxent *aux; |
bd5635a1 RP |
1731 | { |
1732 | register struct type *type = 0; | |
1733 | unsigned int new_c_type; | |
1734 | ||
1735 | if (c_type & ~N_BTMASK) | |
1736 | { | |
1737 | new_c_type = DECREF (c_type); | |
1738 | if (ISPTR (c_type)) | |
1739 | { | |
1740 | type = decode_type (cs, new_c_type, aux); | |
1741 | type = lookup_pointer_type (type); | |
1742 | } | |
1743 | else if (ISFCN (c_type)) | |
1744 | { | |
1745 | type = decode_type (cs, new_c_type, aux); | |
1746 | type = lookup_function_type (type); | |
1747 | } | |
1748 | else if (ISARY (c_type)) | |
1749 | { | |
1750 | int i, n; | |
1751 | register unsigned short *dim; | |
1752 | struct type *base_type; | |
1753 | ||
1754 | /* Define an array type. */ | |
1755 | /* auxent refers to array, not base type */ | |
6988f5c0 | 1756 | if (aux->x_sym.x_tagndx.l == 0) |
bd5635a1 RP |
1757 | cs->c_nsyms = 1; |
1758 | ||
1759 | /* shift the indices down */ | |
1760 | dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; | |
1761 | i = 1; | |
1762 | n = dim[0]; | |
1763 | for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) | |
1764 | *dim = *(dim + 1); | |
1765 | *dim = 0; | |
1766 | ||
1767 | type = (struct type *) | |
1768 | obstack_alloc (symbol_obstack, sizeof (struct type)); | |
1769 | bzero (type, sizeof (struct type)); | |
1770 | ||
1771 | base_type = decode_type (cs, new_c_type, aux); | |
1772 | ||
1773 | TYPE_CODE (type) = TYPE_CODE_ARRAY; | |
1774 | TYPE_TARGET_TYPE (type) = base_type; | |
1775 | TYPE_LENGTH (type) = n * TYPE_LENGTH (base_type); | |
1776 | } | |
1777 | return type; | |
1778 | } | |
1779 | ||
1780 | /* Reference to existing type */ | |
6988f5c0 | 1781 | if (cs->c_nsyms > 1 && aux->x_sym.x_tagndx.l != 0) |
bd5635a1 | 1782 | { |
cadbb07a | 1783 | type = coff_alloc_type (aux->x_sym.x_tagndx.l); |
bd5635a1 RP |
1784 | return type; |
1785 | } | |
1786 | ||
1787 | return decode_base_type (cs, BTYPE (c_type), aux); | |
1788 | } | |
1789 | ||
1790 | /* Decode a coff type specifier for function definition; | |
1791 | return the type that the function returns. */ | |
1792 | ||
1793 | static | |
1794 | struct type * | |
1795 | decode_function_type (cs, c_type, aux) | |
1796 | register struct coff_symbol *cs; | |
1797 | unsigned int c_type; | |
dcc35536 | 1798 | register union internal_auxent *aux; |
bd5635a1 | 1799 | { |
6988f5c0 | 1800 | if (aux->x_sym.x_tagndx.l == 0) |
bd5635a1 RP |
1801 | cs->c_nsyms = 1; /* auxent refers to function, not base type */ |
1802 | ||
1803 | return decode_type (cs, DECREF (c_type), aux); | |
1804 | } | |
1805 | \f | |
1806 | /* basic C types */ | |
1807 | ||
1808 | static | |
1809 | struct type * | |
1810 | decode_base_type (cs, c_type, aux) | |
1811 | register struct coff_symbol *cs; | |
1812 | unsigned int c_type; | |
dcc35536 | 1813 | register union internal_auxent *aux; |
bd5635a1 RP |
1814 | { |
1815 | struct type *type; | |
1816 | ||
1817 | switch (c_type) | |
1818 | { | |
1819 | case T_NULL: | |
1820 | /* shows up with "void (*foo)();" structure members */ | |
1821 | return builtin_type_void; | |
1822 | ||
8aa13b87 JK |
1823 | #if 0 |
1824 | /* DGUX actually defines both T_ARG and T_VOID to the same value. */ | |
bd5635a1 RP |
1825 | #ifdef T_ARG |
1826 | case T_ARG: | |
1827 | /* Shows up in DGUX, I think. Not sure where. */ | |
1828 | return builtin_type_void; /* shouldn't show up here */ | |
1829 | #endif | |
8aa13b87 | 1830 | #endif /* 0 */ |
bd5635a1 RP |
1831 | |
1832 | #ifdef T_VOID | |
1833 | case T_VOID: | |
1834 | /* Intel 960 COFF has this symbol and meaning. */ | |
1835 | return builtin_type_void; | |
1836 | #endif | |
1837 | ||
1838 | case T_CHAR: | |
1839 | return builtin_type_char; | |
1840 | ||
1841 | case T_SHORT: | |
1842 | return builtin_type_short; | |
1843 | ||
1844 | case T_INT: | |
1845 | return builtin_type_int; | |
1846 | ||
1847 | case T_LONG: | |
1848 | return builtin_type_long; | |
1849 | ||
1850 | case T_FLOAT: | |
1851 | return builtin_type_float; | |
1852 | ||
1853 | case T_DOUBLE: | |
1854 | return builtin_type_double; | |
1855 | ||
1856 | case T_STRUCT: | |
1857 | if (cs->c_nsyms != 2) | |
1858 | { | |
1859 | /* anonymous structure type */ | |
1860 | type = coff_alloc_type (cs->c_symnum); | |
1861 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1862 | TYPE_NAME (type) = concat ("struct ", "<opaque>", ""); | |
1863 | TYPE_LENGTH (type) = 0; | |
1864 | TYPE_FIELDS (type) = 0; | |
1865 | TYPE_NFIELDS (type) = 0; | |
1866 | } | |
1867 | else | |
1868 | { | |
1869 | type = read_struct_type (cs->c_symnum, | |
1870 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1871 | aux->x_sym.x_fcnary.x_fcn.x_endndx); | |
1872 | } | |
1873 | return type; | |
1874 | ||
1875 | case T_UNION: | |
1876 | if (cs->c_nsyms != 2) | |
1877 | { | |
1878 | /* anonymous union type */ | |
1879 | type = coff_alloc_type (cs->c_symnum); | |
1880 | TYPE_NAME (type) = concat ("union ", "<opaque>", ""); | |
1881 | TYPE_LENGTH (type) = 0; | |
1882 | TYPE_FIELDS (type) = 0; | |
1883 | TYPE_NFIELDS (type) = 0; | |
1884 | } | |
1885 | else | |
1886 | { | |
1887 | type = read_struct_type (cs->c_symnum, | |
1888 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1889 | aux->x_sym.x_fcnary.x_fcn.x_endndx); | |
1890 | } | |
1891 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1892 | return type; | |
1893 | ||
1894 | case T_ENUM: | |
1895 | return read_enum_type (cs->c_symnum, | |
1896 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1897 | aux->x_sym.x_fcnary.x_fcn.x_endndx); | |
1898 | ||
1899 | case T_MOE: | |
1900 | /* shouldn't show up here */ | |
1901 | break; | |
1902 | ||
1903 | case T_UCHAR: | |
1904 | return builtin_type_unsigned_char; | |
1905 | ||
1906 | case T_USHORT: | |
1907 | return builtin_type_unsigned_short; | |
1908 | ||
1909 | case T_UINT: | |
1910 | return builtin_type_unsigned_int; | |
1911 | ||
1912 | case T_ULONG: | |
1913 | return builtin_type_unsigned_long; | |
1914 | } | |
1915 | printf ("unexpected type %d at symnum %d\n", c_type, cs->c_symnum); | |
1916 | return builtin_type_void; | |
1917 | } | |
1918 | \f | |
1919 | /* This page contains subroutines of read_type. */ | |
1920 | ||
1921 | /* Read the description of a structure (or union type) | |
1922 | and return an object describing the type. */ | |
1923 | ||
1924 | static struct type * | |
1925 | read_struct_type (index, length, lastsym) | |
1926 | int index; | |
1927 | int length; | |
1928 | int lastsym; | |
1929 | { | |
1930 | struct nextfield | |
1931 | { | |
1932 | struct nextfield *next; | |
1933 | struct field field; | |
1934 | }; | |
1935 | ||
1936 | register struct type *type; | |
1937 | register struct nextfield *list = 0; | |
1938 | struct nextfield *new; | |
1939 | int nfields = 0; | |
1940 | register int n; | |
1941 | char *name; | |
1942 | #ifdef NAMES_HAVE_UNDERSCORE | |
1943 | int offset = 1; | |
1944 | #else | |
1945 | int offset = 0; | |
1946 | #endif | |
1947 | struct coff_symbol member_sym; | |
1948 | register struct coff_symbol *ms = &member_sym; | |
dcc35536 JG |
1949 | struct internal_syment sub_sym; |
1950 | union internal_auxent sub_aux; | |
bd5635a1 RP |
1951 | int done = 0; |
1952 | ||
1953 | type = coff_alloc_type (index); | |
1954 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1955 | TYPE_LENGTH (type) = length; | |
1956 | ||
1957 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
1958 | { | |
1959 | read_one_sym (ms, &sub_sym, &sub_aux); | |
1960 | name = ms->c_name; | |
1961 | name = (name[0] == '_' ? name + offset : name); | |
1962 | ||
1963 | switch (ms->c_sclass) | |
1964 | { | |
1965 | case C_MOS: | |
1966 | case C_MOU: | |
1967 | ||
1968 | /* Get space to record the next field's data. */ | |
1969 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1970 | new->next = list; | |
1971 | list = new; | |
1972 | ||
1973 | /* Save the data. */ | |
1974 | list->field.name = savestring (name, strlen (name)); | |
1975 | list->field.type = decode_type (ms, ms->c_type, &sub_aux); | |
1976 | list->field.bitpos = 8 * ms->c_value; | |
1977 | list->field.bitsize = 0; | |
1978 | nfields++; | |
1979 | break; | |
1980 | ||
1981 | case C_FIELD: | |
1982 | ||
1983 | /* Get space to record the next field's data. */ | |
1984 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1985 | new->next = list; | |
1986 | list = new; | |
1987 | ||
1988 | /* Save the data. */ | |
1989 | list->field.name = savestring (name, strlen (name)); | |
1990 | list->field.type = decode_type (ms, ms->c_type, &sub_aux); | |
1991 | list->field.bitpos = ms->c_value; | |
1992 | list->field.bitsize = sub_aux.x_sym.x_misc.x_lnsz.x_size; | |
1993 | nfields++; | |
1994 | break; | |
1995 | ||
1996 | case C_EOS: | |
1997 | done = 1; | |
1998 | break; | |
1999 | } | |
2000 | } | |
2001 | /* Now create the vector of fields, and record how big it is. */ | |
2002 | ||
2003 | TYPE_NFIELDS (type) = nfields; | |
2004 | TYPE_FIELDS (type) = (struct field *) | |
2005 | obstack_alloc (symbol_obstack, sizeof (struct field) * nfields); | |
2006 | ||
2007 | /* Copy the saved-up fields into the field vector. */ | |
2008 | ||
2009 | for (n = nfields; list; list = list->next) | |
2010 | TYPE_FIELD (type, --n) = list->field; | |
2011 | ||
2012 | return type; | |
2013 | } | |
2014 | \f | |
2015 | /* Read a definition of an enumeration type, | |
2016 | and create and return a suitable type object. | |
2017 | Also defines the symbols that represent the values of the type. */ | |
e1ce8aa5 | 2018 | /* Currently assumes it's sizeof (int) and doesn't use length. */ |
bd5635a1 | 2019 | |
61a7292f | 2020 | /* ARGSUSED */ |
bd5635a1 RP |
2021 | static struct type * |
2022 | read_enum_type (index, length, lastsym) | |
2023 | int index; | |
2024 | int length; | |
2025 | int lastsym; | |
2026 | { | |
2027 | register struct symbol *sym; | |
2028 | register struct type *type; | |
2029 | int nsyms = 0; | |
2030 | int done = 0; | |
2031 | struct pending **symlist; | |
2032 | struct coff_symbol member_sym; | |
2033 | register struct coff_symbol *ms = &member_sym; | |
dcc35536 JG |
2034 | struct internal_syment sub_sym; |
2035 | union internal_auxent sub_aux; | |
bd5635a1 RP |
2036 | struct pending *osyms, *syms; |
2037 | register int n; | |
2038 | char *name; | |
2039 | #ifdef NAMES_HAVE_UNDERSCORE | |
2040 | int offset = 1; | |
2041 | #else | |
2042 | int offset = 0; | |
2043 | #endif | |
2044 | ||
2045 | type = coff_alloc_type (index); | |
2046 | if (within_function) | |
2047 | symlist = &local_symbols; | |
2048 | else | |
2049 | symlist = &file_symbols; | |
2050 | osyms = *symlist; | |
2051 | ||
2052 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
2053 | { | |
2054 | read_one_sym (ms, &sub_sym, &sub_aux); | |
2055 | name = ms->c_name; | |
2056 | name = (name[0] == '_' ? name + offset : name); | |
2057 | ||
2058 | switch (ms->c_sclass) | |
2059 | { | |
2060 | case C_MOE: | |
2061 | sym = (struct symbol *) xmalloc (sizeof (struct symbol)); | |
2062 | bzero (sym, sizeof (struct symbol)); | |
2063 | ||
2064 | SYMBOL_NAME (sym) = savestring (name, strlen (name)); | |
2065 | SYMBOL_CLASS (sym) = LOC_CONST; | |
2066 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2067 | SYMBOL_VALUE (sym) = ms->c_value; | |
2068 | add_symbol_to_list (sym, symlist); | |
2069 | nsyms++; | |
2070 | break; | |
2071 | ||
2072 | case C_EOS: | |
2073 | /* Sometimes the linker (on 386/ix 2.0.2 at least) screws | |
2074 | up the count of how many symbols to read. So stop | |
2075 | on .eos. */ | |
2076 | done = 1; | |
2077 | break; | |
2078 | } | |
2079 | } | |
2080 | ||
2081 | /* Now fill in the fields of the type-structure. */ | |
2082 | ||
e1ce8aa5 | 2083 | /* FIXME: Should be sizeof (int) on target, not host. */ |
bd5635a1 RP |
2084 | TYPE_LENGTH (type) = sizeof (int); |
2085 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
2086 | TYPE_NFIELDS (type) = nsyms; | |
2087 | TYPE_FIELDS (type) = (struct field *) | |
2088 | obstack_alloc (symbol_obstack, sizeof (struct field) * nsyms); | |
2089 | ||
2090 | /* Find the symbols for the values and put them into the type. | |
2091 | The symbols can be found in the symlist that we put them on | |
2092 | to cause them to be defined. osyms contains the old value | |
2093 | of that symlist; everything up to there was defined by us. */ | |
2094 | ||
2095 | for (syms = *symlist, n = nsyms; syms != osyms; syms = syms->next) | |
2096 | { | |
2097 | SYMBOL_TYPE (syms->symbol) = type; | |
2098 | TYPE_FIELD_NAME (type, --n) = SYMBOL_NAME (syms->symbol); | |
2099 | TYPE_FIELD_VALUE (type, n) = 0; | |
2100 | TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (syms->symbol); | |
2101 | TYPE_FIELD_BITSIZE (type, n) = 0; | |
2102 | } | |
d8ce1326 JG |
2103 | /* Is this Modula-2's BOOLEAN type? Flag it as such if so. */ |
2104 | if(TYPE_NFIELDS(type) == 2 && | |
2105 | ((!strcmp(TYPE_FIELD_NAME(type,0),"TRUE") && | |
2106 | !strcmp(TYPE_FIELD_NAME(type,1),"FALSE")) || | |
2107 | (!strcmp(TYPE_FIELD_NAME(type,1),"TRUE") && | |
2108 | !strcmp(TYPE_FIELD_NAME(type,0),"FALSE")))) | |
2109 | TYPE_CODE(type) = TYPE_CODE_BOOL; | |
bd5635a1 RP |
2110 | return type; |
2111 | } | |
2112 | ||
2113 | /* Register our ability to parse symbols for coff BFD files */ | |
2114 | ||
2115 | static struct sym_fns coff_sym_fns = | |
2116 | { | |
8aa13b87 JK |
2117 | /* This assumes that 88kbcs implies TDESC and TDESC implies 88kbcs. |
2118 | If that's not true, this can be relaxed, but if it is true, | |
2119 | it will just cause users grief if we try to read the wrong kind | |
2120 | of symbol file. */ | |
2121 | #if defined (TDESC) | |
2122 | "m88kbcs", 8, | |
2123 | #else /* not TDESC */ | |
159a075e SG |
2124 | # ifdef i386 |
2125 | "i386coff", 8, | |
2126 | # else | |
bd5635a1 | 2127 | "coff", 4, |
159a075e | 2128 | # endif /* not i386 */ |
8aa13b87 | 2129 | #endif /* not TDESC */ |
61a7292f | 2130 | coff_new_init, coff_symfile_init, coff_symfile_read, |
bd5635a1 RP |
2131 | }; |
2132 | ||
2133 | void | |
2134 | _initialize_coffread () | |
2135 | { | |
2136 | add_symtab_fns(&coff_sym_fns); | |
2137 | } |