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c906108c SS |
1 | /* Read coff symbol tables and convert to internal format, for GDB. |
2 | Copyright 1987, 88, 89, 90, 91, 92, 93, 94, 96, 97, 1998 | |
3 | Free Software Foundation, Inc. | |
4 | Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu). | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "symtab.h" | |
24 | #include "gdbtypes.h" | |
25 | #include "demangle.h" | |
26 | #include "breakpoint.h" | |
27 | ||
28 | #include "bfd.h" | |
29 | #include "obstack.h" | |
30 | ||
31 | #include "gdb_string.h" | |
32 | #include <ctype.h> | |
33 | ||
34 | #include "coff/internal.h" /* Internal format of COFF symbols in BFD */ | |
35 | #include "libcoff.h" /* FIXME secret internal data from BFD */ | |
36 | ||
37 | #include "symfile.h" | |
38 | #include "objfiles.h" | |
39 | #include "buildsym.h" | |
40 | #include "gdb-stabs.h" | |
41 | #include "stabsread.h" | |
42 | #include "complaints.h" | |
43 | #include "target.h" | |
44 | ||
45 | struct coff_symfile_info { | |
46 | file_ptr min_lineno_offset; /* Where in file lowest line#s are */ | |
47 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ | |
48 | ||
49 | CORE_ADDR textaddr; /* Addr of .text section. */ | |
50 | unsigned int textsize; /* Size of .text section. */ | |
51 | struct stab_section_list *stabsects; /* .stab sections. */ | |
52 | asection *stabstrsect; /* Section pointer for .stab section */ | |
53 | char *stabstrdata; | |
54 | }; | |
55 | ||
56 | /* Translate an external name string into a user-visible name. */ | |
57 | #define EXTERNAL_NAME(string, abfd) \ | |
58 | (string[0] == bfd_get_symbol_leading_char(abfd)? string+1: string) | |
59 | ||
60 | /* To be an sdb debug type, type must have at least a basic or primary | |
61 | derived type. Using this rather than checking against T_NULL is | |
62 | said to prevent core dumps if we try to operate on Michael Bloom | |
63 | dbx-in-coff file. */ | |
64 | ||
65 | #define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK)) | |
66 | ||
67 | /* Convert from an sdb register number to an internal gdb register number. | |
68 | This should be defined in tm.h, if REGISTER_NAMES is not set up | |
69 | to map one to one onto the sdb register numbers. */ | |
70 | ||
71 | #ifndef SDB_REG_TO_REGNUM | |
72 | # define SDB_REG_TO_REGNUM(value) (value) | |
73 | #endif | |
74 | ||
75 | /* Core address of start and end of text of current source file. | |
76 | This comes from a ".text" symbol where x_nlinno > 0. */ | |
77 | ||
78 | static CORE_ADDR current_source_start_addr; | |
79 | static CORE_ADDR current_source_end_addr; | |
80 | ||
81 | /* The addresses of the symbol table stream and number of symbols | |
82 | of the object file we are reading (as copied into core). */ | |
83 | ||
84 | static bfd *nlist_bfd_global; | |
85 | static int nlist_nsyms_global; | |
86 | ||
87 | /* Vector of line number information. */ | |
88 | ||
89 | static struct linetable *line_vector; | |
90 | ||
91 | /* Index of next entry to go in line_vector_index. */ | |
92 | ||
93 | static int line_vector_index; | |
94 | ||
95 | /* Last line number recorded in the line vector. */ | |
96 | ||
97 | static int prev_line_number; | |
98 | ||
99 | /* Number of elements allocated for line_vector currently. */ | |
100 | ||
101 | static int line_vector_length; | |
102 | ||
103 | /* Pointers to scratch storage, used for reading raw symbols and auxents. */ | |
104 | ||
105 | static char *temp_sym; | |
106 | static char *temp_aux; | |
107 | ||
108 | /* Local variables that hold the shift and mask values for the | |
109 | COFF file that we are currently reading. These come back to us | |
110 | from BFD, and are referenced by their macro names, as well as | |
111 | internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF | |
112 | macros from include/coff/internal.h . */ | |
113 | ||
114 | static unsigned local_n_btmask; | |
115 | static unsigned local_n_btshft; | |
116 | static unsigned local_n_tmask; | |
117 | static unsigned local_n_tshift; | |
118 | ||
119 | #define N_BTMASK local_n_btmask | |
120 | #define N_BTSHFT local_n_btshft | |
121 | #define N_TMASK local_n_tmask | |
122 | #define N_TSHIFT local_n_tshift | |
123 | ||
124 | /* Local variables that hold the sizes in the file of various COFF structures. | |
125 | (We only need to know this to read them from the file -- BFD will then | |
126 | translate the data in them, into `internal_xxx' structs in the right | |
127 | byte order, alignment, etc.) */ | |
128 | ||
129 | static unsigned local_linesz; | |
130 | static unsigned local_symesz; | |
131 | static unsigned local_auxesz; | |
132 | ||
133 | /* This is set if this is a PE format file. */ | |
134 | ||
135 | static int pe_file; | |
136 | ||
137 | /* Chain of typedefs of pointers to empty struct/union types. | |
138 | They are chained thru the SYMBOL_VALUE_CHAIN. */ | |
139 | ||
140 | static struct symbol *opaque_type_chain[HASHSIZE]; | |
141 | ||
142 | /* Complaints about various problems in the file being read */ | |
143 | ||
144 | struct complaint ef_complaint = | |
145 | {"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0}; | |
146 | ||
147 | struct complaint ef_stack_complaint = | |
148 | {"`.ef' symbol without matching `.bf' symbol ignored starting at symnum %d", 0, 0}; | |
149 | ||
150 | struct complaint eb_stack_complaint = | |
151 | {"`.eb' symbol without matching `.bb' symbol ignored starting at symnum %d", 0, 0}; | |
152 | ||
153 | struct complaint bf_no_aux_complaint = | |
154 | {"`.bf' symbol %d has no aux entry", 0, 0}; | |
155 | ||
156 | struct complaint ef_no_aux_complaint = | |
157 | {"`.ef' symbol %d has no aux entry", 0, 0}; | |
158 | ||
159 | struct complaint lineno_complaint = | |
160 | {"Line number pointer %d lower than start of line numbers", 0, 0}; | |
161 | ||
162 | struct complaint unexpected_type_complaint = | |
163 | {"Unexpected type for symbol %s", 0, 0}; | |
164 | ||
165 | struct complaint bad_sclass_complaint = | |
166 | {"Bad n_sclass for symbol %s", 0, 0}; | |
167 | ||
168 | struct complaint misordered_blocks_complaint = | |
169 | {"Blocks out of order at address %x", 0, 0}; | |
170 | ||
171 | struct complaint tagndx_bad_complaint = | |
172 | {"Symbol table entry for %s has bad tagndx value", 0, 0}; | |
173 | ||
174 | struct complaint eb_complaint = | |
175 | {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0}; | |
176 | ||
177 | /* Simplified internal version of coff symbol table information */ | |
178 | ||
179 | struct coff_symbol { | |
180 | char *c_name; | |
181 | int c_symnum; /* symbol number of this entry */ | |
182 | int c_naux; /* 0 if syment only, 1 if syment + auxent, etc */ | |
183 | long c_value; | |
184 | int c_sclass; | |
185 | int c_secnum; | |
186 | unsigned int c_type; | |
187 | }; | |
188 | ||
189 | static struct type *coff_read_struct_type PARAMS ((int, int, int)); | |
190 | ||
191 | static struct type *decode_base_type PARAMS ((struct coff_symbol *, | |
192 | unsigned int, | |
193 | union internal_auxent *)); | |
194 | ||
195 | static struct type *decode_type PARAMS ((struct coff_symbol *, unsigned int, | |
196 | union internal_auxent *)); | |
197 | ||
198 | static struct type *decode_function_type PARAMS ((struct coff_symbol *, | |
199 | unsigned int, | |
200 | union internal_auxent *)); | |
201 | ||
202 | static struct type *coff_read_enum_type PARAMS ((int, int, int)); | |
203 | ||
204 | static struct symbol *process_coff_symbol PARAMS ((struct coff_symbol *, | |
205 | union internal_auxent *, | |
206 | struct section_offsets *, | |
207 | struct objfile *)); | |
208 | ||
209 | static void patch_opaque_types PARAMS ((struct symtab *)); | |
210 | ||
211 | static void patch_type PARAMS ((struct type *, struct type *)); | |
212 | ||
213 | static void enter_linenos PARAMS ((long, int, int, struct section_offsets *)); | |
214 | ||
215 | static void free_linetab PARAMS ((void)); | |
216 | ||
217 | static int init_lineno PARAMS ((bfd *, long, int)); | |
218 | ||
219 | static char *getsymname PARAMS ((struct internal_syment *)); | |
220 | ||
221 | static char *coff_getfilename PARAMS ((union internal_auxent *)); | |
222 | ||
223 | static void free_stringtab PARAMS ((void)); | |
224 | ||
225 | static int init_stringtab PARAMS ((bfd *, long)); | |
226 | ||
227 | static void read_one_sym PARAMS ((struct coff_symbol *, | |
228 | struct internal_syment *, | |
229 | union internal_auxent *)); | |
230 | ||
231 | static void coff_symtab_read PARAMS ((long, int, struct section_offsets *, | |
232 | struct objfile *)); | |
233 | ||
234 | static void find_linenos PARAMS ((bfd *, sec_ptr, PTR)); | |
235 | ||
236 | static void coff_symfile_init PARAMS ((struct objfile *)); | |
237 | ||
238 | static void coff_new_init PARAMS ((struct objfile *)); | |
239 | ||
240 | static void coff_symfile_read PARAMS ((struct objfile *, | |
241 | struct section_offsets *, int)); | |
242 | ||
243 | static void coff_symfile_finish PARAMS ((struct objfile *)); | |
244 | ||
245 | static void record_minimal_symbol PARAMS ((char *, CORE_ADDR, | |
246 | enum minimal_symbol_type, | |
247 | struct objfile *)); | |
248 | ||
249 | static void coff_end_symtab PARAMS ((struct objfile *)); | |
250 | ||
251 | static void complete_symtab PARAMS ((char *, CORE_ADDR, unsigned int)); | |
252 | ||
253 | static void coff_start_symtab PARAMS ((char *)); | |
254 | ||
255 | static void coff_record_line PARAMS ((int, CORE_ADDR)); | |
256 | ||
257 | static struct type *coff_alloc_type PARAMS ((int)); | |
258 | ||
259 | static struct type **coff_lookup_type PARAMS ((int)); | |
260 | ||
261 | static void coff_locate_sections PARAMS ((bfd *, asection *, PTR)); | |
262 | \f | |
263 | /* We are called once per section from coff_symfile_read. We | |
264 | need to examine each section we are passed, check to see | |
265 | if it is something we are interested in processing, and | |
266 | if so, stash away some access information for the section. | |
267 | ||
268 | FIXME: The section names should not be hardwired strings (what | |
269 | should they be? I don't think most object file formats have enough | |
270 | section flags to specify what kind of debug section it is | |
271 | -kingdon). */ | |
272 | ||
273 | static void | |
274 | coff_locate_sections (abfd, sectp, csip) | |
275 | bfd *abfd; | |
276 | asection *sectp; | |
277 | PTR csip; | |
278 | { | |
279 | register struct coff_symfile_info *csi; | |
280 | const char *name; | |
281 | ||
282 | csi = (struct coff_symfile_info *) csip; | |
283 | name = bfd_get_section_name (abfd, sectp); | |
284 | if (STREQ (name, ".text")) | |
285 | { | |
286 | csi->textaddr = bfd_section_vma (abfd, sectp); | |
287 | csi->textsize += bfd_section_size (abfd, sectp); | |
288 | } | |
289 | else if (strncmp (name, ".text", sizeof ".text" - 1) == 0) | |
290 | { | |
291 | csi->textsize += bfd_section_size (abfd, sectp); | |
292 | } | |
293 | else if (STREQ (name, ".stabstr")) | |
294 | { | |
295 | csi->stabstrsect = sectp; | |
296 | } | |
297 | else if (strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
298 | { | |
299 | const char *s; | |
300 | ||
301 | /* We can have multiple .stab sections if linked with | |
302 | --split-by-reloc. */ | |
303 | for (s = name + sizeof ".stab" - 1; *s != '\0'; s++) | |
304 | if (! isdigit (*s)) | |
305 | break; | |
306 | if (*s == '\0') | |
307 | { | |
308 | struct stab_section_list *n, **pn; | |
309 | ||
310 | n = ((struct stab_section_list *) | |
311 | xmalloc (sizeof (struct stab_section_list))); | |
312 | n->section = sectp; | |
313 | n->next = NULL; | |
314 | for (pn = &csi->stabsects; *pn != NULL; pn = &(*pn)->next) | |
315 | ; | |
316 | *pn = n; | |
317 | ||
318 | /* This will be run after coffstab_build_psymtabs is called | |
319 | in coff_symfile_read, at which point we no longer need | |
320 | the information. */ | |
321 | make_cleanup (free, n); | |
322 | } | |
323 | } | |
324 | } | |
325 | ||
326 | /* Return the section_offsets* that CS points to. */ | |
327 | static int cs_to_section PARAMS ((struct coff_symbol *, struct objfile *)); | |
328 | ||
329 | struct find_targ_sec_arg { | |
330 | int targ_index; | |
331 | asection **resultp; | |
332 | }; | |
333 | ||
334 | static void find_targ_sec PARAMS ((bfd *, asection *, void *)); | |
335 | ||
336 | static void find_targ_sec (abfd, sect, obj) | |
337 | bfd *abfd; | |
338 | asection *sect; | |
339 | PTR obj; | |
340 | { | |
341 | struct find_targ_sec_arg *args = (struct find_targ_sec_arg *)obj; | |
342 | if (sect->target_index == args->targ_index) | |
343 | *args->resultp = sect; | |
344 | } | |
345 | ||
346 | /* Return the section number (SECT_OFF_*) that CS points to. */ | |
347 | static int | |
348 | cs_to_section (cs, objfile) | |
349 | struct coff_symbol *cs; | |
350 | struct objfile *objfile; | |
351 | { | |
352 | asection *sect = NULL; | |
353 | struct find_targ_sec_arg args; | |
354 | int off = SECT_OFF_TEXT; | |
355 | ||
356 | args.targ_index = cs->c_secnum; | |
357 | args.resultp = § | |
358 | bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); | |
359 | if (sect != NULL) | |
360 | { | |
361 | /* This is the section. Figure out what SECT_OFF_* code it is. */ | |
362 | if (bfd_get_section_flags (abfd, sect) & SEC_CODE) | |
363 | off = SECT_OFF_TEXT; | |
364 | else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD) | |
365 | off = SECT_OFF_DATA; | |
366 | else | |
367 | off = SECT_OFF_BSS; | |
368 | } | |
369 | return off; | |
370 | } | |
371 | ||
372 | /* Return the address of the section of a COFF symbol. */ | |
373 | ||
374 | static CORE_ADDR cs_section_address PARAMS ((struct coff_symbol *, bfd *)); | |
375 | ||
376 | static CORE_ADDR | |
377 | cs_section_address (cs, abfd) | |
378 | struct coff_symbol *cs; | |
379 | bfd *abfd; | |
380 | { | |
381 | asection *sect = NULL; | |
382 | struct find_targ_sec_arg args; | |
383 | CORE_ADDR addr = 0; | |
384 | ||
385 | args.targ_index = cs->c_secnum; | |
386 | args.resultp = § | |
387 | bfd_map_over_sections (abfd, find_targ_sec, &args); | |
388 | if (sect != NULL) | |
389 | addr = bfd_get_section_vma (objfile->obfd, sect); | |
390 | return addr; | |
391 | } | |
392 | ||
393 | /* Look up a coff type-number index. Return the address of the slot | |
394 | where the type for that index is stored. | |
395 | The type-number is in INDEX. | |
396 | ||
397 | This can be used for finding the type associated with that index | |
398 | or for associating a new type with the index. */ | |
399 | ||
400 | static struct type ** | |
401 | coff_lookup_type (index) | |
402 | register int index; | |
403 | { | |
404 | if (index >= type_vector_length) | |
405 | { | |
406 | int old_vector_length = type_vector_length; | |
407 | ||
408 | type_vector_length *= 2; | |
409 | if (index /* is still */ >= type_vector_length) | |
410 | type_vector_length = index * 2; | |
411 | ||
412 | type_vector = (struct type **) | |
413 | xrealloc ((char *) type_vector, | |
414 | type_vector_length * sizeof (struct type *)); | |
415 | memset (&type_vector[old_vector_length], 0, | |
416 | (type_vector_length - old_vector_length) * sizeof(struct type *)); | |
417 | } | |
418 | return &type_vector[index]; | |
419 | } | |
420 | ||
421 | /* Make sure there is a type allocated for type number index | |
422 | and return the type object. | |
423 | This can create an empty (zeroed) type object. */ | |
424 | ||
425 | static struct type * | |
426 | coff_alloc_type (index) | |
427 | int index; | |
428 | { | |
429 | register struct type **type_addr = coff_lookup_type (index); | |
430 | register struct type *type = *type_addr; | |
431 | ||
432 | /* If we are referring to a type not known at all yet, | |
433 | allocate an empty type for it. | |
434 | We will fill it in later if we find out how. */ | |
435 | if (type == NULL) | |
436 | { | |
437 | type = alloc_type (current_objfile); | |
438 | *type_addr = type; | |
439 | } | |
440 | return type; | |
441 | } | |
442 | \f | |
443 | /* Record a line number entry for line LINE at address PC. | |
444 | FIXME: Use record_line instead. */ | |
445 | ||
446 | static void | |
447 | coff_record_line (line, pc) | |
448 | int line; | |
449 | CORE_ADDR pc; | |
450 | { | |
451 | struct linetable_entry *e; | |
452 | /* Make sure line vector is big enough. */ | |
453 | ||
454 | if (line_vector_index + 2 >= line_vector_length) | |
455 | { | |
456 | line_vector_length *= 2; | |
457 | line_vector = (struct linetable *) | |
458 | xrealloc ((char *) line_vector, sizeof (struct linetable) | |
459 | + (line_vector_length | |
460 | * sizeof (struct linetable_entry))); | |
461 | } | |
462 | ||
463 | e = line_vector->item + line_vector_index++; | |
464 | e->line = line; e->pc = pc; | |
465 | } | |
466 | \f | |
467 | /* Start a new symtab for a new source file. | |
468 | This is called when a COFF ".file" symbol is seen; | |
469 | it indicates the start of data for one original source file. */ | |
470 | ||
471 | static void | |
472 | coff_start_symtab (name) | |
473 | char *name; | |
474 | { | |
475 | start_symtab ( | |
476 | /* We fill in the filename later. start_symtab puts | |
477 | this pointer into last_source_file and we put it in | |
478 | subfiles->name, which end_symtab frees; that's why | |
479 | it must be malloc'd. */ | |
480 | savestring (name, strlen(name)), | |
481 | /* We never know the directory name for COFF. */ | |
482 | NULL, | |
483 | /* The start address is irrelevant, since we set | |
484 | last_source_start_addr in coff_end_symtab. */ | |
485 | 0); | |
486 | record_debugformat ("COFF"); | |
487 | ||
488 | /* Initialize the source file line number information for this file. */ | |
489 | ||
490 | if (line_vector) /* Unlikely, but maybe possible? */ | |
491 | free ((PTR)line_vector); | |
492 | line_vector_index = 0; | |
493 | line_vector_length = 1000; | |
494 | prev_line_number = -2; /* Force first line number to be explicit */ | |
495 | line_vector = (struct linetable *) | |
496 | xmalloc (sizeof (struct linetable) | |
497 | + line_vector_length * sizeof (struct linetable_entry)); | |
498 | } | |
499 | ||
500 | /* Save the vital information from when starting to read a file, | |
501 | for use when closing off the current file. | |
502 | NAME is the file name the symbols came from, START_ADDR is the first | |
503 | text address for the file, and SIZE is the number of bytes of text. */ | |
504 | ||
505 | static void | |
506 | complete_symtab (name, start_addr, size) | |
507 | char *name; | |
508 | CORE_ADDR start_addr; | |
509 | unsigned int size; | |
510 | { | |
511 | if (last_source_file != NULL) | |
512 | free (last_source_file); | |
513 | last_source_file = savestring (name, strlen (name)); | |
514 | current_source_start_addr = start_addr; | |
515 | current_source_end_addr = start_addr + size; | |
516 | ||
517 | if (current_objfile -> ei.entry_point >= current_source_start_addr && | |
518 | current_objfile -> ei.entry_point < current_source_end_addr) | |
519 | { | |
520 | current_objfile -> ei.entry_file_lowpc = current_source_start_addr; | |
521 | current_objfile -> ei.entry_file_highpc = current_source_end_addr; | |
522 | } | |
523 | } | |
524 | ||
525 | /* Finish the symbol definitions for one main source file, | |
526 | close off all the lexical contexts for that file | |
527 | (creating struct block's for them), then make the | |
528 | struct symtab for that file and put it in the list of all such. */ | |
529 | ||
530 | static void | |
531 | coff_end_symtab (objfile) | |
532 | struct objfile *objfile; | |
533 | { | |
534 | struct symtab *symtab; | |
535 | ||
536 | last_source_start_addr = current_source_start_addr; | |
537 | ||
538 | /* For no good reason, this file stores the number of entries in a | |
539 | separate variable instead of in line_vector->nitems. Fix it. */ | |
540 | if (line_vector) | |
541 | line_vector->nitems = line_vector_index; | |
542 | ||
543 | /* For COFF, we only have one subfile, so we can just look at | |
544 | subfiles and not worry about there being other elements in the | |
545 | chain. We fill in various fields now because we didn't know them | |
546 | before (or because doing it now is simply an artifact of how this | |
547 | file used to be written). */ | |
548 | subfiles->line_vector = line_vector; | |
549 | ||
550 | symtab = end_symtab (current_source_end_addr, objfile, 0); | |
551 | ||
552 | if (symtab != NULL) | |
553 | free_named_symtabs (symtab->filename); | |
554 | ||
555 | /* Reinitialize for beginning of new file. */ | |
556 | line_vector = 0; | |
557 | line_vector_length = -1; | |
558 | last_source_file = NULL; | |
559 | } | |
560 | \f | |
561 | static void | |
562 | record_minimal_symbol (name, address, type, objfile) | |
563 | char *name; | |
564 | CORE_ADDR address; | |
565 | enum minimal_symbol_type type; | |
566 | struct objfile *objfile; | |
567 | { | |
568 | /* We don't want TDESC entry points in the minimal symbol table */ | |
569 | if (name[0] == '@') return; | |
570 | ||
571 | prim_record_minimal_symbol (name, address, type, objfile); | |
572 | } | |
573 | \f | |
574 | /* coff_symfile_init () | |
575 | is the coff-specific initialization routine for reading symbols. | |
576 | It is passed a struct objfile which contains, among other things, | |
577 | the BFD for the file whose symbols are being read, and a slot for | |
578 | a pointer to "private data" which we fill with cookies and other | |
579 | treats for coff_symfile_read (). | |
580 | ||
581 | We will only be called if this is a COFF or COFF-like file. | |
582 | BFD handles figuring out the format of the file, and code in symtab.c | |
583 | uses BFD's determination to vector to us. | |
584 | ||
585 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ | |
586 | ||
587 | static void | |
588 | coff_symfile_init (objfile) | |
589 | struct objfile *objfile; | |
590 | { | |
591 | /* Allocate struct to keep track of stab reading. */ | |
592 | objfile->sym_stab_info = (struct dbx_symfile_info *) | |
593 | xmmalloc (objfile->md, sizeof (struct dbx_symfile_info)); | |
594 | ||
595 | memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info)); | |
596 | ||
597 | /* Allocate struct to keep track of the symfile */ | |
598 | objfile->sym_private = xmmalloc (objfile->md, | |
599 | sizeof (struct coff_symfile_info)); | |
600 | ||
601 | memset (objfile->sym_private, 0, sizeof (struct coff_symfile_info)); | |
602 | ||
603 | /* COFF objects may be reordered, so set OBJF_REORDERED. If we | |
604 | find this causes a significant slowdown in gdb then we could | |
605 | set it in the debug symbol readers only when necessary. */ | |
606 | objfile->flags |= OBJF_REORDERED; | |
607 | ||
608 | init_entry_point_info (objfile); | |
609 | } | |
610 | ||
611 | /* This function is called for every section; it finds the outer limits | |
612 | of the line table (minimum and maximum file offset) so that the | |
613 | mainline code can read the whole thing for efficiency. */ | |
614 | ||
615 | /* ARGSUSED */ | |
616 | static void | |
617 | find_linenos (abfd, asect, vpinfo) | |
618 | bfd *abfd; | |
619 | sec_ptr asect; | |
620 | PTR vpinfo; | |
621 | { | |
622 | struct coff_symfile_info *info; | |
623 | int size, count; | |
624 | file_ptr offset, maxoff; | |
625 | ||
626 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
627 | count = asect->lineno_count; | |
628 | /* End of warning */ | |
629 | ||
630 | if (count == 0) | |
631 | return; | |
632 | size = count * local_linesz; | |
633 | ||
634 | info = (struct coff_symfile_info *)vpinfo; | |
635 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
636 | offset = asect->line_filepos; | |
637 | /* End of warning */ | |
638 | ||
639 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) | |
640 | info->min_lineno_offset = offset; | |
641 | ||
642 | maxoff = offset + size; | |
643 | if (maxoff > info->max_lineno_offset) | |
644 | info->max_lineno_offset = maxoff; | |
645 | } | |
646 | ||
647 | ||
648 | /* The BFD for this file -- only good while we're actively reading | |
649 | symbols into a psymtab or a symtab. */ | |
650 | ||
651 | static bfd *symfile_bfd; | |
652 | ||
653 | /* Read a symbol file, after initialization by coff_symfile_init. */ | |
654 | ||
655 | /* ARGSUSED */ | |
656 | static void | |
657 | coff_symfile_read (objfile, section_offsets, mainline) | |
658 | struct objfile *objfile; | |
659 | struct section_offsets *section_offsets; | |
660 | int mainline; | |
661 | { | |
662 | struct coff_symfile_info *info; | |
663 | struct dbx_symfile_info *dbxinfo; | |
664 | bfd *abfd = objfile->obfd; | |
665 | coff_data_type *cdata = coff_data (abfd); | |
666 | char *name = bfd_get_filename (abfd); | |
667 | register int val; | |
668 | int num_symbols; | |
669 | int symtab_offset; | |
670 | int stringtab_offset; | |
671 | struct cleanup *back_to; | |
672 | int stabstrsize; | |
673 | ||
674 | info = (struct coff_symfile_info *) objfile -> sym_private; | |
675 | dbxinfo = objfile->sym_stab_info; | |
676 | symfile_bfd = abfd; /* Kludge for swap routines */ | |
677 | ||
678 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
679 | num_symbols = bfd_get_symcount (abfd); /* How many syms */ | |
680 | symtab_offset = cdata->sym_filepos; /* Symbol table file offset */ | |
681 | stringtab_offset = symtab_offset + /* String table file offset */ | |
682 | num_symbols * cdata->local_symesz; | |
683 | ||
684 | /* Set a few file-statics that give us specific information about | |
685 | the particular COFF file format we're reading. */ | |
686 | local_linesz = cdata->local_linesz; | |
687 | local_n_btmask = cdata->local_n_btmask; | |
688 | local_n_btshft = cdata->local_n_btshft; | |
689 | local_n_tmask = cdata->local_n_tmask; | |
690 | local_n_tshift = cdata->local_n_tshift; | |
691 | local_linesz = cdata->local_linesz; | |
692 | local_symesz = cdata->local_symesz; | |
693 | local_auxesz = cdata->local_auxesz; | |
694 | ||
695 | /* Allocate space for raw symbol and aux entries, based on their | |
696 | space requirements as reported by BFD. */ | |
697 | temp_sym = (char *) xmalloc | |
698 | (cdata->local_symesz + cdata->local_auxesz); | |
699 | temp_aux = temp_sym + cdata->local_symesz; | |
700 | back_to = make_cleanup ((make_cleanup_func) free_current_contents, &temp_sym); | |
701 | ||
702 | /* We need to know whether this is a PE file, because in PE files, | |
703 | unlike standard COFF files, symbol values are stored as offsets | |
704 | from the section address, rather than as absolute addresses. | |
705 | FIXME: We should use BFD to read the symbol table, and thus avoid | |
706 | this problem. */ | |
707 | pe_file = strncmp (bfd_get_target (objfile->obfd), "pe", 2) == 0; | |
708 | ||
709 | /* End of warning */ | |
710 | ||
711 | /* Read the line number table, all at once. */ | |
712 | info->min_lineno_offset = 0; | |
713 | info->max_lineno_offset = 0; | |
714 | bfd_map_over_sections (abfd, find_linenos, (PTR) info); | |
715 | ||
716 | make_cleanup ((make_cleanup_func) free_linetab, 0); | |
717 | val = init_lineno (abfd, info->min_lineno_offset, | |
718 | info->max_lineno_offset - info->min_lineno_offset); | |
719 | if (val < 0) | |
720 | error ("\"%s\": error reading line numbers\n", name); | |
721 | ||
722 | /* Now read the string table, all at once. */ | |
723 | ||
724 | make_cleanup ((make_cleanup_func) free_stringtab, 0); | |
725 | val = init_stringtab (abfd, stringtab_offset); | |
726 | if (val < 0) | |
727 | error ("\"%s\": can't get string table", name); | |
728 | ||
729 | init_minimal_symbol_collection (); | |
730 | make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0); | |
731 | ||
732 | /* Now that the executable file is positioned at symbol table, | |
733 | process it and define symbols accordingly. */ | |
734 | ||
735 | coff_symtab_read ((long) symtab_offset, num_symbols, section_offsets, | |
736 | objfile); | |
737 | ||
738 | /* Sort symbols alphabetically within each block. */ | |
739 | ||
740 | { | |
741 | struct symtab *s; | |
742 | ||
743 | for (s = objfile -> symtabs; s != NULL; s = s -> next) | |
744 | sort_symtab_syms (s); | |
745 | } | |
746 | ||
747 | /* Install any minimal symbols that have been collected as the current | |
748 | minimal symbols for this objfile. */ | |
749 | ||
750 | install_minimal_symbols (objfile); | |
751 | ||
752 | bfd_map_over_sections (abfd, coff_locate_sections, (PTR) info); | |
753 | ||
754 | if (info->stabsects) | |
755 | { | |
756 | /* FIXME: dubious. Why can't we use something normal like | |
757 | bfd_get_section_contents? */ | |
758 | bfd_seek (abfd, abfd->where, 0); | |
759 | ||
760 | stabstrsize = bfd_section_size (abfd, info->stabstrsect); | |
761 | ||
762 | coffstab_build_psymtabs (objfile, | |
763 | section_offsets, | |
764 | mainline, | |
765 | info->textaddr, info->textsize, | |
766 | info->stabsects, | |
767 | info->stabstrsect->filepos, stabstrsize); | |
768 | } | |
769 | ||
770 | do_cleanups (back_to); | |
771 | } | |
772 | ||
773 | static void | |
774 | coff_new_init (ignore) | |
775 | struct objfile *ignore; | |
776 | { | |
777 | } | |
778 | ||
779 | /* Perform any local cleanups required when we are done with a particular | |
780 | objfile. I.E, we are in the process of discarding all symbol information | |
781 | for an objfile, freeing up all memory held for it, and unlinking the | |
782 | objfile struct from the global list of known objfiles. */ | |
783 | ||
784 | static void | |
785 | coff_symfile_finish (objfile) | |
786 | struct objfile *objfile; | |
787 | { | |
788 | if (objfile -> sym_private != NULL) | |
789 | { | |
790 | mfree (objfile -> md, objfile -> sym_private); | |
791 | } | |
792 | } | |
793 | ||
794 | \f | |
795 | /* Given pointers to a symbol table in coff style exec file, | |
796 | analyze them and create struct symtab's describing the symbols. | |
797 | NSYMS is the number of symbols in the symbol table. | |
798 | We read them one at a time using read_one_sym (). */ | |
799 | ||
800 | static void | |
801 | coff_symtab_read (symtab_offset, nsyms, section_offsets, objfile) | |
802 | long symtab_offset; | |
803 | int nsyms; | |
804 | struct section_offsets *section_offsets; | |
805 | struct objfile *objfile; | |
806 | { | |
807 | register struct context_stack *new; | |
808 | struct coff_symbol coff_symbol; | |
809 | register struct coff_symbol *cs = &coff_symbol; | |
810 | static struct internal_syment main_sym; | |
811 | static union internal_auxent main_aux; | |
812 | struct coff_symbol fcn_cs_saved; | |
813 | static struct internal_syment fcn_sym_saved; | |
814 | static union internal_auxent fcn_aux_saved; | |
815 | struct symtab *s; | |
816 | /* A .file is open. */ | |
817 | int in_source_file = 0; | |
818 | int next_file_symnum = -1; | |
819 | /* Name of the current file. */ | |
820 | char *filestring = ""; | |
821 | int depth = 0; | |
822 | int fcn_first_line = 0; | |
823 | int fcn_last_line = 0; | |
824 | int fcn_start_addr = 0; | |
825 | long fcn_line_ptr = 0; | |
826 | int val; | |
827 | CORE_ADDR tmpaddr; | |
828 | ||
829 | /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous.... | |
830 | it's hard to know I've really worked around it. The fix should be | |
831 | harmless, anyway). The symptom of the bug is that the first | |
832 | fread (in read_one_sym), will (in my example) actually get data | |
833 | from file offset 268, when the fseek was to 264 (and ftell shows | |
834 | 264). This causes all hell to break loose. I was unable to | |
835 | reproduce this on a short test program which operated on the same | |
836 | file, performing (I think) the same sequence of operations. | |
837 | ||
838 | It stopped happening when I put in this (former) rewind(). | |
839 | ||
840 | FIXME: Find out if this has been reported to Sun, whether it has | |
841 | been fixed in a later release, etc. */ | |
842 | ||
843 | bfd_seek (objfile->obfd, 0, 0); | |
844 | ||
845 | /* Position to read the symbol table. */ | |
846 | val = bfd_seek (objfile->obfd, (long) symtab_offset, 0); | |
847 | if (val < 0) | |
848 | perror_with_name (objfile->name); | |
849 | ||
850 | current_objfile = objfile; | |
851 | nlist_bfd_global = objfile->obfd; | |
852 | nlist_nsyms_global = nsyms; | |
853 | last_source_file = NULL; | |
854 | memset (opaque_type_chain, 0, sizeof opaque_type_chain); | |
855 | ||
856 | if (type_vector) /* Get rid of previous one */ | |
857 | free ((PTR) type_vector); | |
858 | type_vector_length = 160; | |
859 | type_vector = (struct type **) | |
860 | xmalloc (type_vector_length * sizeof (struct type *)); | |
861 | memset (type_vector, 0, type_vector_length * sizeof (struct type *)); | |
862 | ||
863 | coff_start_symtab (""); | |
864 | ||
865 | symnum = 0; | |
866 | while (symnum < nsyms) | |
867 | { | |
868 | QUIT; /* Make this command interruptable. */ | |
869 | ||
870 | read_one_sym (cs, &main_sym, &main_aux); | |
871 | ||
872 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) | |
873 | { | |
874 | if (last_source_file) | |
875 | coff_end_symtab (objfile); | |
876 | ||
877 | coff_start_symtab ("_globals_"); | |
878 | complete_symtab ("_globals_", 0, 0); | |
879 | /* done with all files, everything from here on out is globals */ | |
880 | } | |
881 | ||
882 | /* Special case for file with type declarations only, no text. */ | |
883 | if (!last_source_file && SDB_TYPE (cs->c_type) | |
884 | && cs->c_secnum == N_DEBUG) | |
885 | complete_symtab (filestring, 0, 0); | |
886 | ||
887 | /* Typedefs should not be treated as symbol definitions. */ | |
888 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) | |
889 | { | |
890 | /* Record all functions -- external and static -- in minsyms. */ | |
891 | tmpaddr = cs->c_value + ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
892 | record_minimal_symbol (cs->c_name, tmpaddr, mst_text, objfile); | |
893 | ||
894 | fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; | |
895 | fcn_start_addr = tmpaddr; | |
896 | fcn_cs_saved = *cs; | |
897 | fcn_sym_saved = main_sym; | |
898 | fcn_aux_saved = main_aux; | |
899 | continue; | |
900 | } | |
901 | ||
902 | switch (cs->c_sclass) | |
903 | { | |
904 | case C_EFCN: | |
905 | case C_EXTDEF: | |
906 | case C_ULABEL: | |
907 | case C_USTATIC: | |
908 | case C_LINE: | |
909 | case C_ALIAS: | |
910 | case C_HIDDEN: | |
911 | complain (&bad_sclass_complaint, cs->c_name); | |
912 | break; | |
913 | ||
914 | case C_FILE: | |
915 | /* c_value field contains symnum of next .file entry in table | |
916 | or symnum of first global after last .file. */ | |
917 | next_file_symnum = cs->c_value; | |
918 | if (cs->c_naux > 0) | |
919 | filestring = coff_getfilename (&main_aux); | |
920 | else | |
921 | filestring = ""; | |
922 | ||
923 | /* Complete symbol table for last object file | |
924 | containing debugging information. */ | |
925 | if (last_source_file) | |
926 | { | |
927 | coff_end_symtab (objfile); | |
928 | coff_start_symtab (filestring); | |
929 | } | |
930 | in_source_file = 1; | |
931 | break; | |
932 | ||
933 | /* C_LABEL is used for labels and static functions. Including | |
934 | it here allows gdb to see static functions when no debug | |
935 | info is available. */ | |
936 | case C_LABEL: | |
937 | /* However, labels within a function can make weird backtraces, | |
938 | so filter them out (from phdm@macqel.be). */ | |
939 | if (within_function) | |
940 | break; | |
941 | case C_STAT: | |
942 | case C_THUMBLABEL: | |
943 | case C_THUMBSTAT: | |
944 | case C_THUMBSTATFUNC: | |
945 | if (cs->c_name[0] == '.') | |
946 | { | |
947 | if (STREQ (cs->c_name, ".text")) { | |
948 | /* FIXME: don't wire in ".text" as section name | |
949 | or symbol name! */ | |
950 | /* Check for in_source_file deals with case of | |
951 | a file with debugging symbols | |
952 | followed by a later file with no symbols. */ | |
953 | if (in_source_file) | |
954 | complete_symtab (filestring, | |
955 | cs->c_value + ANOFFSET (section_offsets, SECT_OFF_TEXT), | |
956 | main_aux.x_scn.x_scnlen); | |
957 | in_source_file = 0; | |
958 | } | |
959 | /* flush rest of '.' symbols */ | |
960 | break; | |
961 | } | |
962 | else if (!SDB_TYPE (cs->c_type) | |
963 | && cs->c_name[0] == 'L' | |
964 | && (strncmp (cs->c_name, "LI%", 3) == 0 | |
965 | || strncmp (cs->c_name, "LF%", 3) == 0 | |
966 | || strncmp (cs->c_name,"LC%",3) == 0 | |
967 | || strncmp (cs->c_name,"LP%",3) == 0 | |
968 | || strncmp (cs->c_name,"LPB%",4) == 0 | |
969 | || strncmp (cs->c_name,"LBB%",4) == 0 | |
970 | || strncmp (cs->c_name,"LBE%",4) == 0 | |
971 | || strncmp (cs->c_name,"LPBX%",5) == 0)) | |
972 | /* At least on a 3b1, gcc generates swbeg and string labels | |
973 | that look like this. Ignore them. */ | |
974 | break; | |
975 | /* fall in for static symbols that don't start with '.' */ | |
976 | case C_THUMBEXT: | |
977 | case C_THUMBEXTFUNC: | |
978 | case C_EXT: | |
979 | { | |
980 | /* Record it in the minimal symbols regardless of | |
981 | SDB_TYPE. This parallels what we do for other debug | |
982 | formats, and probably is needed to make | |
983 | print_address_symbolic work right without the (now | |
984 | gone) "set fast-symbolic-addr off" kludge. */ | |
985 | ||
986 | /* FIXME: should use mst_abs, and not relocate, if absolute. */ | |
987 | enum minimal_symbol_type ms_type; | |
988 | int sec; | |
989 | ||
990 | if (cs->c_secnum == N_UNDEF) | |
991 | { | |
992 | /* This is a common symbol. See if the target | |
993 | environment knows where it has been relocated to. */ | |
994 | CORE_ADDR reladdr; | |
995 | if (target_lookup_symbol (cs->c_name, &reladdr)) | |
996 | { | |
997 | /* Error in lookup; ignore symbol. */ | |
998 | break; | |
999 | } | |
1000 | tmpaddr = reladdr; | |
1001 | /* The address has already been relocated; make sure that | |
1002 | objfile_relocate doesn't relocate it again. */ | |
1003 | sec = -2; | |
1004 | ms_type = cs->c_sclass == C_EXT | |
1005 | || cs->c_sclass == C_THUMBEXT ? | |
1006 | mst_bss : mst_file_bss; | |
1007 | } | |
1008 | else | |
1009 | { | |
1010 | sec = cs_to_section (cs, objfile); | |
1011 | tmpaddr = cs->c_value; | |
1012 | if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC | |
1013 | || cs->c_sclass == C_THUMBEXT) | |
1014 | tmpaddr += ANOFFSET (section_offsets, sec); | |
1015 | ||
1016 | switch (sec) | |
1017 | { | |
1018 | case SECT_OFF_TEXT: | |
1019 | case SECT_OFF_RODATA: | |
1020 | ms_type = | |
1021 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC | |
1022 | || cs->c_sclass == C_THUMBEXT ? | |
1023 | mst_text : mst_file_text; | |
1024 | #ifdef SMASH_TEXT_ADDRESS | |
1025 | if (tmpaddr & 1) /* FIXME: delete this line */ | |
1026 | SMASH_TEXT_ADDRESS (tmpaddr); | |
1027 | #endif | |
1028 | break; | |
1029 | case SECT_OFF_DATA: | |
1030 | ms_type = | |
1031 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? | |
1032 | mst_data : mst_file_data; | |
1033 | break; | |
1034 | case SECT_OFF_BSS: | |
1035 | ms_type = | |
1036 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? | |
1037 | mst_data : mst_file_data; | |
1038 | break; | |
1039 | default: | |
1040 | ms_type = mst_unknown; | |
1041 | break; | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | if (cs->c_name[0] != '@' /* Skip tdesc symbols */) | |
1046 | { | |
1047 | struct minimal_symbol *msym; | |
1048 | ||
1049 | msym = prim_record_minimal_symbol_and_info | |
1050 | (cs->c_name, tmpaddr, ms_type, (char *)cs->c_sclass, sec, | |
1051 | NULL, objfile); | |
1052 | #ifdef COFF_MAKE_MSYMBOL_SPECIAL | |
1053 | if(msym) | |
1054 | COFF_MAKE_MSYMBOL_SPECIAL(cs->c_sclass, msym); | |
1055 | #endif | |
1056 | } | |
1057 | if (SDB_TYPE (cs->c_type)) | |
1058 | { | |
1059 | struct symbol *sym; | |
1060 | sym = process_coff_symbol | |
1061 | (cs, &main_aux, section_offsets, objfile); | |
1062 | SYMBOL_VALUE (sym) = tmpaddr; | |
1063 | SYMBOL_SECTION (sym) = sec; | |
1064 | } | |
1065 | } | |
1066 | break; | |
1067 | ||
1068 | case C_FCN: | |
1069 | if (STREQ (cs->c_name, ".bf")) | |
1070 | { | |
1071 | within_function = 1; | |
1072 | ||
1073 | /* value contains address of first non-init type code */ | |
1074 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1075 | contains line number of '{' } */ | |
1076 | if (cs->c_naux != 1) | |
1077 | complain (&bf_no_aux_complaint, cs->c_symnum); | |
1078 | fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1079 | ||
1080 | /* Might want to check that locals are 0 and | |
1081 | context_stack_depth is zero, and complain if not. */ | |
1082 | ||
1083 | depth = 0; | |
1084 | new = push_context (depth, fcn_start_addr); | |
1085 | fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); | |
1086 | new->name = | |
1087 | process_coff_symbol (&fcn_cs_saved, &fcn_aux_saved, | |
1088 | section_offsets, objfile); | |
1089 | } | |
1090 | else if (STREQ (cs->c_name, ".ef")) | |
1091 | { | |
1092 | /* the value of .ef is the address of epilogue code; | |
1093 | not useful for gdb. */ | |
1094 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1095 | contains number of lines to '}' */ | |
1096 | ||
1097 | if (context_stack_depth <= 0) | |
1098 | { /* We attempted to pop an empty context stack */ | |
1099 | complain (&ef_stack_complaint, cs->c_symnum); | |
1100 | within_function = 0; | |
1101 | break; | |
1102 | } | |
1103 | ||
1104 | new = pop_context (); | |
1105 | /* Stack must be empty now. */ | |
1106 | if (context_stack_depth > 0 || new == NULL) | |
1107 | { | |
1108 | complain (&ef_complaint, cs->c_symnum); | |
1109 | within_function = 0; | |
1110 | break; | |
1111 | } | |
1112 | if (cs->c_naux != 1) | |
1113 | { | |
1114 | complain (&ef_no_aux_complaint, cs->c_symnum); | |
1115 | fcn_last_line = 0x7FFFFFFF; | |
1116 | } | |
1117 | else | |
1118 | { | |
1119 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1120 | } | |
1121 | enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line, | |
1122 | section_offsets); | |
1123 | ||
1124 | finish_block (new->name, &local_symbols, new->old_blocks, | |
1125 | new->start_addr, | |
1126 | #if defined (FUNCTION_EPILOGUE_SIZE) | |
1127 | /* This macro should be defined only on | |
1128 | machines where the | |
1129 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
1130 | field is always zero. | |
1131 | So use the .bf record information that | |
1132 | points to the epilogue and add the size | |
1133 | of the epilogue. */ | |
1134 | cs->c_value | |
1135 | + FUNCTION_EPILOGUE_SIZE | |
1136 | + ANOFFSET (section_offsets, SECT_OFF_TEXT), | |
1137 | #else | |
1138 | fcn_cs_saved.c_value | |
1139 | + fcn_aux_saved.x_sym.x_misc.x_fsize | |
1140 | + ANOFFSET (section_offsets, SECT_OFF_TEXT), | |
1141 | #endif | |
1142 | objfile | |
1143 | ); | |
1144 | within_function = 0; | |
1145 | } | |
1146 | break; | |
1147 | ||
1148 | case C_BLOCK: | |
1149 | if (STREQ (cs->c_name, ".bb")) | |
1150 | { | |
1151 | tmpaddr = cs->c_value; | |
1152 | tmpaddr += ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
1153 | push_context (++depth, tmpaddr); | |
1154 | } | |
1155 | else if (STREQ (cs->c_name, ".eb")) | |
1156 | { | |
1157 | if (context_stack_depth <= 0) | |
1158 | { /* We attempted to pop an empty context stack */ | |
1159 | complain (&eb_stack_complaint, cs->c_symnum); | |
1160 | break; | |
1161 | } | |
1162 | ||
1163 | new = pop_context (); | |
1164 | if (depth-- != new->depth) | |
1165 | { | |
1166 | complain (&eb_complaint, symnum); | |
1167 | break; | |
1168 | } | |
1169 | if (local_symbols && context_stack_depth > 0) | |
1170 | { | |
1171 | tmpaddr = | |
1172 | cs->c_value + ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
1173 | /* Make a block for the local symbols within. */ | |
1174 | finish_block (0, &local_symbols, new->old_blocks, | |
1175 | new->start_addr, tmpaddr, objfile); | |
1176 | } | |
1177 | /* Now pop locals of block just finished. */ | |
1178 | local_symbols = new->locals; | |
1179 | } | |
1180 | break; | |
1181 | ||
1182 | default: | |
1183 | process_coff_symbol (cs, &main_aux, section_offsets, objfile); | |
1184 | break; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | if (last_source_file) | |
1189 | coff_end_symtab (objfile); | |
1190 | ||
1191 | /* Patch up any opaque types (references to types that are not defined | |
1192 | in the file where they are referenced, e.g. "struct foo *bar"). */ | |
1193 | ALL_OBJFILE_SYMTABS (objfile, s) | |
1194 | patch_opaque_types (s); | |
1195 | ||
1196 | current_objfile = NULL; | |
1197 | } | |
1198 | \f | |
1199 | /* Routines for reading headers and symbols from executable. */ | |
1200 | ||
1201 | /* Read the next symbol, swap it, and return it in both internal_syment | |
1202 | form, and coff_symbol form. Also return its first auxent, if any, | |
1203 | in internal_auxent form, and skip any other auxents. */ | |
1204 | ||
1205 | static void | |
1206 | read_one_sym (cs, sym, aux) | |
1207 | register struct coff_symbol *cs; | |
1208 | register struct internal_syment *sym; | |
1209 | register union internal_auxent *aux; | |
1210 | { | |
1211 | int i; | |
1212 | ||
1213 | cs->c_symnum = symnum; | |
1214 | bfd_read (temp_sym, local_symesz, 1, nlist_bfd_global); | |
1215 | bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *)sym); | |
1216 | cs->c_naux = sym->n_numaux & 0xff; | |
1217 | if (cs->c_naux >= 1) | |
1218 | { | |
1219 | bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global); | |
1220 | bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass, | |
1221 | 0, cs->c_naux, (char *)aux); | |
1222 | /* If more than one aux entry, read past it (only the first aux | |
1223 | is important). */ | |
1224 | for (i = 1; i < cs->c_naux; i++) | |
1225 | bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global); | |
1226 | } | |
1227 | cs->c_name = getsymname (sym); | |
1228 | cs->c_value = sym->n_value; | |
1229 | cs->c_sclass = (sym->n_sclass & 0xff); | |
1230 | cs->c_secnum = sym->n_scnum; | |
1231 | cs->c_type = (unsigned) sym->n_type; | |
1232 | if (!SDB_TYPE (cs->c_type)) | |
1233 | cs->c_type = 0; | |
1234 | ||
1235 | #if 0 | |
1236 | if (cs->c_sclass & 128) | |
1237 | printf("thumb symbol %s, class 0x%x\n", cs->c_name, cs->c_sclass); | |
1238 | #endif | |
1239 | ||
1240 | symnum += 1 + cs->c_naux; | |
1241 | ||
1242 | /* The PE file format stores symbol values as offsets within the | |
1243 | section, rather than as absolute addresses. We correct that | |
1244 | here, if the symbol has an appropriate storage class. FIXME: We | |
1245 | should use BFD to read the symbols, rather than duplicating the | |
1246 | work here. */ | |
1247 | if (pe_file) | |
1248 | { | |
1249 | switch (cs->c_sclass) | |
1250 | { | |
1251 | case C_EXT: | |
1252 | case C_THUMBEXT: | |
1253 | case C_THUMBEXTFUNC: | |
1254 | case C_SECTION: | |
1255 | case C_NT_WEAK: | |
1256 | case C_STAT: | |
1257 | case C_THUMBSTAT: | |
1258 | case C_THUMBSTATFUNC: | |
1259 | case C_LABEL: | |
1260 | case C_THUMBLABEL: | |
1261 | case C_BLOCK: | |
1262 | case C_FCN: | |
1263 | case C_EFCN: | |
1264 | if (cs->c_secnum != 0) | |
1265 | cs->c_value += cs_section_address (cs, symfile_bfd); | |
1266 | break; | |
1267 | } | |
1268 | } | |
1269 | } | |
1270 | \f | |
1271 | /* Support for string table handling */ | |
1272 | ||
1273 | static char *stringtab = NULL; | |
1274 | ||
1275 | static int | |
1276 | init_stringtab (abfd, offset) | |
1277 | bfd *abfd; | |
1278 | long offset; | |
1279 | { | |
1280 | long length; | |
1281 | int val; | |
1282 | unsigned char lengthbuf[4]; | |
1283 | ||
1284 | free_stringtab (); | |
1285 | ||
1286 | /* If the file is stripped, the offset might be zero, indicating no | |
1287 | string table. Just return with `stringtab' set to null. */ | |
1288 | if (offset == 0) | |
1289 | return 0; | |
1290 | ||
1291 | if (bfd_seek (abfd, offset, 0) < 0) | |
1292 | return -1; | |
1293 | ||
1294 | val = bfd_read ((char *)lengthbuf, sizeof lengthbuf, 1, abfd); | |
1295 | length = bfd_h_get_32 (symfile_bfd, lengthbuf); | |
1296 | ||
1297 | /* If no string table is needed, then the file may end immediately | |
1298 | after the symbols. Just return with `stringtab' set to null. */ | |
1299 | if (val != sizeof lengthbuf || length < sizeof lengthbuf) | |
1300 | return 0; | |
1301 | ||
1302 | stringtab = (char *) xmalloc (length); | |
1303 | /* This is in target format (probably not very useful, and not currently | |
1304 | used), not host format. */ | |
1305 | memcpy (stringtab, lengthbuf, sizeof lengthbuf); | |
1306 | if (length == sizeof length) /* Empty table -- just the count */ | |
1307 | return 0; | |
1308 | ||
1309 | val = bfd_read (stringtab + sizeof lengthbuf, length - sizeof lengthbuf, 1, abfd); | |
1310 | if (val != length - sizeof lengthbuf || stringtab[length - 1] != '\0') | |
1311 | return -1; | |
1312 | ||
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | static void | |
1317 | free_stringtab () | |
1318 | { | |
1319 | if (stringtab) | |
1320 | free (stringtab); | |
1321 | stringtab = NULL; | |
1322 | } | |
1323 | ||
1324 | static char * | |
1325 | getsymname (symbol_entry) | |
1326 | struct internal_syment *symbol_entry; | |
1327 | { | |
1328 | static char buffer[SYMNMLEN+1]; | |
1329 | char *result; | |
1330 | ||
1331 | if (symbol_entry->_n._n_n._n_zeroes == 0) | |
1332 | { | |
1333 | /* FIXME: Probably should be detecting corrupt symbol files by | |
1334 | seeing whether offset points to within the stringtab. */ | |
1335 | result = stringtab + symbol_entry->_n._n_n._n_offset; | |
1336 | } | |
1337 | else | |
1338 | { | |
1339 | strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN); | |
1340 | buffer[SYMNMLEN] = '\0'; | |
1341 | result = buffer; | |
1342 | } | |
1343 | return result; | |
1344 | } | |
1345 | ||
1346 | /* Extract the file name from the aux entry of a C_FILE symbol. Return | |
1347 | only the last component of the name. Result is in static storage and | |
1348 | is only good for temporary use. */ | |
1349 | ||
1350 | static char * | |
1351 | coff_getfilename (aux_entry) | |
1352 | union internal_auxent *aux_entry; | |
1353 | { | |
1354 | static char buffer[BUFSIZ]; | |
1355 | register char *temp; | |
1356 | char *result; | |
1357 | ||
1358 | if (aux_entry->x_file.x_n.x_zeroes == 0) | |
1359 | strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); | |
1360 | else | |
1361 | { | |
1362 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); | |
1363 | buffer[FILNMLEN] = '\0'; | |
1364 | } | |
1365 | result = buffer; | |
1366 | ||
1367 | /* FIXME: We should not be throwing away the information about what | |
1368 | directory. It should go into dirname of the symtab, or some such | |
1369 | place. */ | |
1370 | if ((temp = strrchr (result, '/')) != NULL) | |
1371 | result = temp + 1; | |
1372 | return (result); | |
1373 | } | |
1374 | \f | |
1375 | /* Support for line number handling. */ | |
1376 | ||
1377 | static char *linetab = NULL; | |
1378 | static long linetab_offset; | |
1379 | static unsigned long linetab_size; | |
1380 | ||
1381 | /* Read in all the line numbers for fast lookups later. Leave them in | |
1382 | external (unswapped) format in memory; we'll swap them as we enter | |
1383 | them into GDB's data structures. */ | |
1384 | ||
1385 | static int | |
1386 | init_lineno (abfd, offset, size) | |
1387 | bfd *abfd; | |
1388 | long offset; | |
1389 | int size; | |
1390 | { | |
1391 | int val; | |
1392 | ||
1393 | linetab_offset = offset; | |
1394 | linetab_size = size; | |
1395 | ||
1396 | free_linetab(); | |
1397 | ||
1398 | if (size == 0) | |
1399 | return 0; | |
1400 | ||
1401 | if (bfd_seek (abfd, offset, 0) < 0) | |
1402 | return -1; | |
1403 | ||
1404 | /* Allocate the desired table, plus a sentinel */ | |
1405 | linetab = (char *) xmalloc (size + local_linesz); | |
1406 | ||
1407 | val = bfd_read (linetab, size, 1, abfd); | |
1408 | if (val != size) | |
1409 | return -1; | |
1410 | ||
1411 | /* Terminate it with an all-zero sentinel record */ | |
1412 | memset (linetab + size, 0, local_linesz); | |
1413 | ||
1414 | return 0; | |
1415 | } | |
1416 | ||
1417 | static void | |
1418 | free_linetab () | |
1419 | { | |
1420 | if (linetab) | |
1421 | free (linetab); | |
1422 | linetab = NULL; | |
1423 | } | |
1424 | ||
1425 | #if !defined (L_LNNO32) | |
1426 | #define L_LNNO32(lp) ((lp)->l_lnno) | |
1427 | #endif | |
1428 | ||
1429 | static void | |
1430 | enter_linenos (file_offset, first_line, last_line, section_offsets) | |
1431 | long file_offset; | |
1432 | register int first_line; | |
1433 | register int last_line; | |
1434 | struct section_offsets *section_offsets; | |
1435 | { | |
1436 | register char *rawptr; | |
1437 | struct internal_lineno lptr; | |
1438 | ||
1439 | if (!linetab) | |
1440 | return ; | |
1441 | if (file_offset < linetab_offset) | |
1442 | { | |
1443 | complain (&lineno_complaint, file_offset); | |
1444 | if (file_offset > linetab_size) /* Too big to be an offset? */ | |
1445 | return; | |
1446 | file_offset += linetab_offset; /* Try reading at that linetab offset */ | |
1447 | } | |
1448 | ||
1449 | rawptr = &linetab[file_offset - linetab_offset]; | |
1450 | ||
1451 | /* skip first line entry for each function */ | |
1452 | rawptr += local_linesz; | |
1453 | /* line numbers start at one for the first line of the function */ | |
1454 | first_line--; | |
1455 | ||
1456 | for (;;) { | |
1457 | bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr); | |
1458 | rawptr += local_linesz; | |
1459 | /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */ | |
1460 | if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line) | |
1461 | coff_record_line (first_line + L_LNNO32 (&lptr), | |
1462 | lptr.l_addr.l_paddr | |
1463 | + ANOFFSET (section_offsets, SECT_OFF_TEXT)); | |
1464 | else | |
1465 | break; | |
1466 | } | |
1467 | } | |
1468 | \f | |
1469 | static void | |
1470 | patch_type (type, real_type) | |
1471 | struct type *type; | |
1472 | struct type *real_type; | |
1473 | { | |
1474 | register struct type *target = TYPE_TARGET_TYPE (type); | |
1475 | register struct type *real_target = TYPE_TARGET_TYPE (real_type); | |
1476 | int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); | |
1477 | ||
1478 | TYPE_LENGTH (target) = TYPE_LENGTH (real_target); | |
1479 | TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); | |
1480 | TYPE_FIELDS (target) = (struct field *) TYPE_ALLOC (target, field_size); | |
1481 | ||
1482 | memcpy (TYPE_FIELDS (target), TYPE_FIELDS (real_target), field_size); | |
1483 | ||
1484 | if (TYPE_NAME (real_target)) | |
1485 | { | |
1486 | if (TYPE_NAME (target)) | |
1487 | free (TYPE_NAME (target)); | |
1488 | TYPE_NAME (target) = concat (TYPE_NAME (real_target), NULL); | |
1489 | } | |
1490 | } | |
1491 | ||
1492 | /* Patch up all appropriate typedef symbols in the opaque_type_chains | |
1493 | so that they can be used to print out opaque data structures properly. */ | |
1494 | ||
1495 | static void | |
1496 | patch_opaque_types (s) | |
1497 | struct symtab *s; | |
1498 | { | |
1499 | register struct block *b; | |
1500 | register int i; | |
1501 | register struct symbol *real_sym; | |
1502 | ||
1503 | /* Go through the per-file symbols only */ | |
1504 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); | |
1505 | for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--) | |
1506 | { | |
1507 | /* Find completed typedefs to use to fix opaque ones. | |
1508 | Remove syms from the chain when their types are stored, | |
1509 | but search the whole chain, as there may be several syms | |
1510 | from different files with the same name. */ | |
1511 | real_sym = BLOCK_SYM (b, i); | |
1512 | if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF && | |
1513 | SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE && | |
1514 | TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR && | |
1515 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) | |
1516 | { | |
1517 | register char *name = SYMBOL_NAME (real_sym); | |
1518 | register int hash = hashname (name); | |
1519 | register struct symbol *sym, *prev; | |
1520 | ||
1521 | prev = 0; | |
1522 | for (sym = opaque_type_chain[hash]; sym;) | |
1523 | { | |
1524 | if (name[0] == SYMBOL_NAME (sym)[0] && | |
1525 | STREQ (name + 1, SYMBOL_NAME (sym) + 1)) | |
1526 | { | |
1527 | if (prev) | |
1528 | { | |
1529 | SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); | |
1530 | } | |
1531 | else | |
1532 | { | |
1533 | opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); | |
1534 | } | |
1535 | ||
1536 | patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); | |
1537 | ||
1538 | if (prev) | |
1539 | { | |
1540 | sym = SYMBOL_VALUE_CHAIN (prev); | |
1541 | } | |
1542 | else | |
1543 | { | |
1544 | sym = opaque_type_chain[hash]; | |
1545 | } | |
1546 | } | |
1547 | else | |
1548 | { | |
1549 | prev = sym; | |
1550 | sym = SYMBOL_VALUE_CHAIN (sym); | |
1551 | } | |
1552 | } | |
1553 | } | |
1554 | } | |
1555 | } | |
1556 | \f | |
1557 | static struct symbol * | |
1558 | process_coff_symbol (cs, aux, section_offsets, objfile) | |
1559 | register struct coff_symbol *cs; | |
1560 | register union internal_auxent *aux; | |
1561 | struct section_offsets *section_offsets; | |
1562 | struct objfile *objfile; | |
1563 | { | |
1564 | register struct symbol *sym | |
1565 | = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, | |
1566 | sizeof (struct symbol)); | |
1567 | char *name; | |
1568 | ||
1569 | memset (sym, 0, sizeof (struct symbol)); | |
1570 | name = cs->c_name; | |
1571 | name = EXTERNAL_NAME (name, objfile->obfd); | |
1572 | SYMBOL_NAME (sym) = obsavestring (name, strlen (name), | |
1573 | &objfile->symbol_obstack); | |
1574 | SYMBOL_LANGUAGE (sym) = language_auto; | |
1575 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); | |
1576 | ||
1577 | /* default assumptions */ | |
1578 | SYMBOL_VALUE (sym) = cs->c_value; | |
1579 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1580 | SYMBOL_SECTION (sym) = cs_to_section (cs, objfile); | |
1581 | ||
1582 | if (ISFCN (cs->c_type)) | |
1583 | { | |
1584 | SYMBOL_VALUE (sym) += ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
1585 | SYMBOL_TYPE(sym) = | |
1586 | lookup_function_type (decode_function_type (cs, cs->c_type, aux)); | |
1587 | ||
1588 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
1589 | if (cs->c_sclass == C_STAT || cs->c_sclass == C_THUMBSTAT | |
1590 | || cs->c_sclass == C_THUMBSTATFUNC) | |
1591 | add_symbol_to_list (sym, &file_symbols); | |
1592 | else if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT | |
1593 | || cs->c_sclass == C_THUMBEXTFUNC) | |
1594 | add_symbol_to_list (sym, &global_symbols); | |
1595 | } | |
1596 | else | |
1597 | { | |
1598 | SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux); | |
1599 | switch (cs->c_sclass) | |
1600 | { | |
1601 | case C_NULL: | |
1602 | break; | |
1603 | ||
1604 | case C_AUTO: | |
1605 | SYMBOL_CLASS (sym) = LOC_LOCAL; | |
1606 | add_symbol_to_list (sym, &local_symbols); | |
1607 | break; | |
1608 | ||
1609 | case C_THUMBEXT: | |
1610 | case C_THUMBEXTFUNC: | |
1611 | case C_EXT: | |
1612 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1613 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
1614 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
1615 | add_symbol_to_list (sym, &global_symbols); | |
1616 | break; | |
1617 | ||
1618 | case C_THUMBSTAT: | |
1619 | case C_THUMBSTATFUNC: | |
1620 | case C_STAT: | |
1621 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1622 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
1623 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
1624 | if (within_function) { | |
1625 | /* Static symbol of local scope */ | |
1626 | add_symbol_to_list (sym, &local_symbols); | |
1627 | } | |
1628 | else { | |
1629 | /* Static symbol at top level of file */ | |
1630 | add_symbol_to_list (sym, &file_symbols); | |
1631 | } | |
1632 | break; | |
1633 | ||
1634 | #ifdef C_GLBLREG /* AMD coff */ | |
1635 | case C_GLBLREG: | |
1636 | #endif | |
1637 | case C_REG: | |
1638 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
1639 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value); | |
1640 | add_symbol_to_list (sym, &local_symbols); | |
1641 | break; | |
1642 | ||
1643 | case C_THUMBLABEL: | |
1644 | case C_LABEL: | |
1645 | break; | |
1646 | ||
1647 | case C_ARG: | |
1648 | SYMBOL_CLASS (sym) = LOC_ARG; | |
1649 | add_symbol_to_list (sym, &local_symbols); | |
1650 | #if !defined (BELIEVE_PCC_PROMOTION) | |
1651 | if (TARGET_BYTE_ORDER == BIG_ENDIAN) | |
1652 | { | |
1653 | /* If PCC says a parameter is a short or a char, | |
1654 | aligned on an int boundary, realign it to the | |
1655 | "little end" of the int. */ | |
1656 | struct type *temptype; | |
1657 | temptype = lookup_fundamental_type (current_objfile, | |
1658 | FT_INTEGER); | |
1659 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) | |
1660 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT | |
1661 | && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (temptype)) | |
1662 | { | |
1663 | SYMBOL_VALUE (sym) += | |
1664 | TYPE_LENGTH (temptype) | |
1665 | - TYPE_LENGTH (SYMBOL_TYPE (sym)); | |
1666 | } | |
1667 | } | |
1668 | #endif | |
1669 | break; | |
1670 | ||
1671 | case C_REGPARM: | |
1672 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
1673 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value); | |
1674 | add_symbol_to_list (sym, &local_symbols); | |
1675 | #if !defined (BELIEVE_PCC_PROMOTION) | |
1676 | /* FIXME: This should retain the current type, since it's just | |
1677 | a register value. gnu@adobe, 26Feb93 */ | |
1678 | { | |
1679 | /* If PCC says a parameter is a short or a char, | |
1680 | it is really an int. */ | |
1681 | struct type *temptype; | |
1682 | temptype = | |
1683 | lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1684 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) | |
1685 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT) | |
1686 | { | |
1687 | SYMBOL_TYPE (sym) = | |
1688 | (TYPE_UNSIGNED (SYMBOL_TYPE (sym)) | |
1689 | ? lookup_fundamental_type (current_objfile, | |
1690 | FT_UNSIGNED_INTEGER) | |
1691 | : temptype); | |
1692 | } | |
1693 | } | |
1694 | #endif | |
1695 | break; | |
1696 | ||
1697 | case C_TPDEF: | |
1698 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1699 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1700 | ||
1701 | /* If type has no name, give it one */ | |
1702 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
1703 | { | |
1704 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR | |
1705 | || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC) | |
1706 | { | |
1707 | /* If we are giving a name to a type such as "pointer to | |
1708 | foo" or "function returning foo", we better not set | |
1709 | the TYPE_NAME. If the program contains "typedef char | |
1710 | *caddr_t;", we don't want all variables of type char | |
1711 | * to print as caddr_t. This is not just a | |
1712 | consequence of GDB's type management; CC and GCC (at | |
1713 | least through version 2.4) both output variables of | |
1714 | either type char * or caddr_t with the type | |
1715 | refering to the C_TPDEF symbol for caddr_t. If a future | |
1716 | compiler cleans this up it GDB is not ready for it | |
1717 | yet, but if it becomes ready we somehow need to | |
1718 | disable this check (without breaking the PCC/GCC2.4 | |
1719 | case). | |
1720 | ||
1721 | Sigh. | |
1722 | ||
1723 | Fortunately, this check seems not to be necessary | |
1724 | for anything except pointers or functions. */ | |
1725 | ; | |
1726 | } | |
1727 | else | |
1728 | TYPE_NAME (SYMBOL_TYPE (sym)) = | |
1729 | concat (SYMBOL_NAME (sym), NULL); | |
1730 | } | |
1731 | #ifdef CXUX_TARGET | |
1732 | /* Ignore vendor section for Harris CX/UX targets. */ | |
1733 | else if (cs->c_name[0] == '$') | |
1734 | break; | |
1735 | #endif /* CXUX_TARGET */ | |
1736 | ||
1737 | /* Keep track of any type which points to empty structured type, | |
1738 | so it can be filled from a definition from another file. A | |
1739 | simple forward reference (TYPE_CODE_UNDEF) is not an | |
1740 | empty structured type, though; the forward references | |
1741 | work themselves out via the magic of coff_lookup_type. */ | |
1742 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && | |
1743 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0 && | |
1744 | TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) != | |
1745 | TYPE_CODE_UNDEF) | |
1746 | { | |
1747 | register int i = hashname (SYMBOL_NAME (sym)); | |
1748 | ||
1749 | SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; | |
1750 | opaque_type_chain[i] = sym; | |
1751 | } | |
1752 | add_symbol_to_list (sym, &file_symbols); | |
1753 | break; | |
1754 | ||
1755 | case C_STRTAG: | |
1756 | case C_UNTAG: | |
1757 | case C_ENTAG: | |
1758 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1759 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
1760 | ||
1761 | /* Some compilers try to be helpful by inventing "fake" | |
1762 | names for anonymous enums, structures, and unions, like | |
1763 | "~0fake" or ".0fake". Thanks, but no thanks... */ | |
1764 | if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0) | |
1765 | if (SYMBOL_NAME(sym) != NULL | |
1766 | && *SYMBOL_NAME(sym) != '~' | |
1767 | && *SYMBOL_NAME(sym) != '.') | |
1768 | TYPE_TAG_NAME (SYMBOL_TYPE (sym)) = | |
1769 | concat (SYMBOL_NAME (sym), NULL); | |
1770 | ||
1771 | add_symbol_to_list (sym, &file_symbols); | |
1772 | break; | |
1773 | ||
1774 | default: | |
1775 | break; | |
1776 | } | |
1777 | } | |
1778 | return sym; | |
1779 | } | |
1780 | \f | |
1781 | /* Decode a coff type specifier; return the type that is meant. */ | |
1782 | ||
1783 | static struct type * | |
1784 | decode_type (cs, c_type, aux) | |
1785 | register struct coff_symbol *cs; | |
1786 | unsigned int c_type; | |
1787 | register union internal_auxent *aux; | |
1788 | { | |
1789 | register struct type *type = 0; | |
1790 | unsigned int new_c_type; | |
1791 | ||
1792 | if (c_type & ~N_BTMASK) | |
1793 | { | |
1794 | new_c_type = DECREF (c_type); | |
1795 | if (ISPTR (c_type)) | |
1796 | { | |
1797 | type = decode_type (cs, new_c_type, aux); | |
1798 | type = lookup_pointer_type (type); | |
1799 | } | |
1800 | else if (ISFCN (c_type)) | |
1801 | { | |
1802 | type = decode_type (cs, new_c_type, aux); | |
1803 | type = lookup_function_type (type); | |
1804 | } | |
1805 | else if (ISARY (c_type)) | |
1806 | { | |
1807 | int i, n; | |
1808 | register unsigned short *dim; | |
1809 | struct type *base_type, *index_type, *range_type; | |
1810 | ||
1811 | /* Define an array type. */ | |
1812 | /* auxent refers to array, not base type */ | |
1813 | if (aux->x_sym.x_tagndx.l == 0) | |
1814 | cs->c_naux = 0; | |
1815 | ||
1816 | /* shift the indices down */ | |
1817 | dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; | |
1818 | i = 1; | |
1819 | n = dim[0]; | |
1820 | for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) | |
1821 | *dim = *(dim + 1); | |
1822 | *dim = 0; | |
1823 | ||
1824 | base_type = decode_type (cs, new_c_type, aux); | |
1825 | index_type = lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1826 | range_type = | |
1827 | create_range_type ((struct type *) NULL, index_type, 0, n - 1); | |
1828 | type = | |
1829 | create_array_type ((struct type *) NULL, base_type, range_type); | |
1830 | } | |
1831 | return type; | |
1832 | } | |
1833 | ||
1834 | /* Reference to existing type. This only occurs with the | |
1835 | struct, union, and enum types. EPI a29k coff | |
1836 | fakes us out by producing aux entries with a nonzero | |
1837 | x_tagndx for definitions of structs, unions, and enums, so we | |
1838 | have to check the c_sclass field. SCO 3.2v4 cc gets confused | |
1839 | with pointers to pointers to defined structs, and generates | |
1840 | negative x_tagndx fields. */ | |
1841 | if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0) | |
1842 | { | |
1843 | if (cs->c_sclass != C_STRTAG | |
1844 | && cs->c_sclass != C_UNTAG | |
1845 | && cs->c_sclass != C_ENTAG | |
1846 | && aux->x_sym.x_tagndx.l >= 0) | |
1847 | { | |
1848 | type = coff_alloc_type (aux->x_sym.x_tagndx.l); | |
1849 | return type; | |
1850 | } | |
1851 | else | |
1852 | { | |
1853 | complain (&tagndx_bad_complaint, cs->c_name); | |
1854 | /* And fall through to decode_base_type... */ | |
1855 | } | |
1856 | } | |
1857 | ||
1858 | return decode_base_type (cs, BTYPE (c_type), aux); | |
1859 | } | |
1860 | ||
1861 | /* Decode a coff type specifier for function definition; | |
1862 | return the type that the function returns. */ | |
1863 | ||
1864 | static struct type * | |
1865 | decode_function_type (cs, c_type, aux) | |
1866 | register struct coff_symbol *cs; | |
1867 | unsigned int c_type; | |
1868 | register union internal_auxent *aux; | |
1869 | { | |
1870 | if (aux->x_sym.x_tagndx.l == 0) | |
1871 | cs->c_naux = 0; /* auxent refers to function, not base type */ | |
1872 | ||
1873 | return decode_type (cs, DECREF (c_type), aux); | |
1874 | } | |
1875 | \f | |
1876 | /* basic C types */ | |
1877 | ||
1878 | static struct type * | |
1879 | decode_base_type (cs, c_type, aux) | |
1880 | register struct coff_symbol *cs; | |
1881 | unsigned int c_type; | |
1882 | register union internal_auxent *aux; | |
1883 | { | |
1884 | struct type *type; | |
1885 | ||
1886 | switch (c_type) | |
1887 | { | |
1888 | case T_NULL: | |
1889 | /* shows up with "void (*foo)();" structure members */ | |
1890 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
1891 | ||
1892 | #if 0 | |
1893 | /* DGUX actually defines both T_ARG and T_VOID to the same value. */ | |
1894 | #ifdef T_ARG | |
1895 | case T_ARG: | |
1896 | /* Shows up in DGUX, I think. Not sure where. */ | |
1897 | return lookup_fundamental_type (current_objfile, FT_VOID); /* shouldn't show up here */ | |
1898 | #endif | |
1899 | #endif /* 0 */ | |
1900 | ||
1901 | #ifdef T_VOID | |
1902 | case T_VOID: | |
1903 | /* Intel 960 COFF has this symbol and meaning. */ | |
1904 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
1905 | #endif | |
1906 | ||
1907 | case T_CHAR: | |
1908 | return lookup_fundamental_type (current_objfile, FT_CHAR); | |
1909 | ||
1910 | case T_SHORT: | |
1911 | return lookup_fundamental_type (current_objfile, FT_SHORT); | |
1912 | ||
1913 | case T_INT: | |
1914 | return lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1915 | ||
1916 | case T_LONG: | |
1917 | if (cs->c_sclass == C_FIELD | |
1918 | && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) | |
1919 | return lookup_fundamental_type (current_objfile, FT_LONG_LONG); | |
1920 | else | |
1921 | return lookup_fundamental_type (current_objfile, FT_LONG); | |
1922 | ||
1923 | case T_FLOAT: | |
1924 | return lookup_fundamental_type (current_objfile, FT_FLOAT); | |
1925 | ||
1926 | case T_DOUBLE: | |
1927 | return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); | |
1928 | ||
1929 | case T_LNGDBL: | |
1930 | return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); | |
1931 | ||
1932 | case T_STRUCT: | |
1933 | if (cs->c_naux != 1) | |
1934 | { | |
1935 | /* anonymous structure type */ | |
1936 | type = coff_alloc_type (cs->c_symnum); | |
1937 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1938 | TYPE_NAME (type) = NULL; | |
1939 | /* This used to set the tag to "<opaque>". But I think setting it | |
1940 | to NULL is right, and the printing code can print it as | |
1941 | "struct {...}". */ | |
1942 | TYPE_TAG_NAME (type) = NULL; | |
1943 | INIT_CPLUS_SPECIFIC(type); | |
1944 | TYPE_LENGTH (type) = 0; | |
1945 | TYPE_FIELDS (type) = 0; | |
1946 | TYPE_NFIELDS (type) = 0; | |
1947 | } | |
1948 | else | |
1949 | { | |
1950 | type = coff_read_struct_type (cs->c_symnum, | |
1951 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1952 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
1953 | } | |
1954 | return type; | |
1955 | ||
1956 | case T_UNION: | |
1957 | if (cs->c_naux != 1) | |
1958 | { | |
1959 | /* anonymous union type */ | |
1960 | type = coff_alloc_type (cs->c_symnum); | |
1961 | TYPE_NAME (type) = NULL; | |
1962 | /* This used to set the tag to "<opaque>". But I think setting it | |
1963 | to NULL is right, and the printing code can print it as | |
1964 | "union {...}". */ | |
1965 | TYPE_TAG_NAME (type) = NULL; | |
1966 | INIT_CPLUS_SPECIFIC(type); | |
1967 | TYPE_LENGTH (type) = 0; | |
1968 | TYPE_FIELDS (type) = 0; | |
1969 | TYPE_NFIELDS (type) = 0; | |
1970 | } | |
1971 | else | |
1972 | { | |
1973 | type = coff_read_struct_type (cs->c_symnum, | |
1974 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1975 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
1976 | } | |
1977 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1978 | return type; | |
1979 | ||
1980 | case T_ENUM: | |
1981 | if (cs->c_naux != 1) | |
1982 | { | |
1983 | /* anonymous enum type */ | |
1984 | type = coff_alloc_type (cs->c_symnum); | |
1985 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
1986 | TYPE_NAME (type) = NULL; | |
1987 | /* This used to set the tag to "<opaque>". But I think setting it | |
1988 | to NULL is right, and the printing code can print it as | |
1989 | "enum {...}". */ | |
1990 | TYPE_TAG_NAME (type) = NULL; | |
1991 | TYPE_LENGTH (type) = 0; | |
1992 | TYPE_FIELDS (type) = 0; | |
1993 | TYPE_NFIELDS(type) = 0; | |
1994 | } | |
1995 | else | |
1996 | { | |
1997 | type = coff_read_enum_type (cs->c_symnum, | |
1998 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1999 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
2000 | } | |
2001 | return type; | |
2002 | ||
2003 | case T_MOE: | |
2004 | /* shouldn't show up here */ | |
2005 | break; | |
2006 | ||
2007 | case T_UCHAR: | |
2008 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); | |
2009 | ||
2010 | case T_USHORT: | |
2011 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); | |
2012 | ||
2013 | case T_UINT: | |
2014 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); | |
2015 | ||
2016 | case T_ULONG: | |
2017 | if (cs->c_sclass == C_FIELD | |
2018 | && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) | |
2019 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); | |
2020 | else | |
2021 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG); | |
2022 | } | |
2023 | complain (&unexpected_type_complaint, cs->c_name); | |
2024 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
2025 | } | |
2026 | \f | |
2027 | /* This page contains subroutines of read_type. */ | |
2028 | ||
2029 | /* Read the description of a structure (or union type) and return an | |
2030 | object describing the type. */ | |
2031 | ||
2032 | static struct type * | |
2033 | coff_read_struct_type (index, length, lastsym) | |
2034 | int index; | |
2035 | int length; | |
2036 | int lastsym; | |
2037 | { | |
2038 | struct nextfield | |
2039 | { | |
2040 | struct nextfield *next; | |
2041 | struct field field; | |
2042 | }; | |
2043 | ||
2044 | register struct type *type; | |
2045 | register struct nextfield *list = 0; | |
2046 | struct nextfield *new; | |
2047 | int nfields = 0; | |
2048 | register int n; | |
2049 | char *name; | |
2050 | struct coff_symbol member_sym; | |
2051 | register struct coff_symbol *ms = &member_sym; | |
2052 | struct internal_syment sub_sym; | |
2053 | union internal_auxent sub_aux; | |
2054 | int done = 0; | |
2055 | ||
2056 | type = coff_alloc_type (index); | |
2057 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
2058 | INIT_CPLUS_SPECIFIC(type); | |
2059 | TYPE_LENGTH (type) = length; | |
2060 | ||
2061 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
2062 | { | |
2063 | read_one_sym (ms, &sub_sym, &sub_aux); | |
2064 | name = ms->c_name; | |
2065 | name = EXTERNAL_NAME (name, current_objfile->obfd); | |
2066 | ||
2067 | switch (ms->c_sclass) | |
2068 | { | |
2069 | case C_MOS: | |
2070 | case C_MOU: | |
2071 | ||
2072 | /* Get space to record the next field's data. */ | |
2073 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
2074 | new->next = list; | |
2075 | list = new; | |
2076 | ||
2077 | /* Save the data. */ | |
2078 | list->field.name = | |
2079 | obsavestring (name, | |
2080 | strlen (name), | |
2081 | ¤t_objfile->symbol_obstack); | |
2082 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); | |
2083 | FIELD_BITPOS (list->field) = 8 * ms->c_value; | |
2084 | FIELD_BITSIZE (list->field) = 0; | |
2085 | nfields++; | |
2086 | break; | |
2087 | ||
2088 | case C_FIELD: | |
2089 | ||
2090 | /* Get space to record the next field's data. */ | |
2091 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
2092 | new->next = list; | |
2093 | list = new; | |
2094 | ||
2095 | /* Save the data. */ | |
2096 | list->field.name = | |
2097 | obsavestring (name, | |
2098 | strlen (name), | |
2099 | ¤t_objfile->symbol_obstack); | |
2100 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); | |
2101 | FIELD_BITPOS (list->field) = ms->c_value; | |
2102 | FIELD_BITSIZE (list->field) = sub_aux.x_sym.x_misc.x_lnsz.x_size; | |
2103 | nfields++; | |
2104 | break; | |
2105 | ||
2106 | case C_EOS: | |
2107 | done = 1; | |
2108 | break; | |
2109 | } | |
2110 | } | |
2111 | /* Now create the vector of fields, and record how big it is. */ | |
2112 | ||
2113 | TYPE_NFIELDS (type) = nfields; | |
2114 | TYPE_FIELDS (type) = (struct field *) | |
2115 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
2116 | ||
2117 | /* Copy the saved-up fields into the field vector. */ | |
2118 | ||
2119 | for (n = nfields; list; list = list->next) | |
2120 | TYPE_FIELD (type, --n) = list->field; | |
2121 | ||
2122 | return type; | |
2123 | } | |
2124 | \f | |
2125 | /* Read a definition of an enumeration type, | |
2126 | and create and return a suitable type object. | |
2127 | Also defines the symbols that represent the values of the type. */ | |
2128 | ||
2129 | /* ARGSUSED */ | |
2130 | static struct type * | |
2131 | coff_read_enum_type (index, length, lastsym) | |
2132 | int index; | |
2133 | int length; | |
2134 | int lastsym; | |
2135 | { | |
2136 | register struct symbol *sym; | |
2137 | register struct type *type; | |
2138 | int nsyms = 0; | |
2139 | int done = 0; | |
2140 | struct pending **symlist; | |
2141 | struct coff_symbol member_sym; | |
2142 | register struct coff_symbol *ms = &member_sym; | |
2143 | struct internal_syment sub_sym; | |
2144 | union internal_auxent sub_aux; | |
2145 | struct pending *osyms, *syms; | |
2146 | int o_nsyms; | |
2147 | register int n; | |
2148 | char *name; | |
2149 | int unsigned_enum = 1; | |
2150 | ||
2151 | type = coff_alloc_type (index); | |
2152 | if (within_function) | |
2153 | symlist = &local_symbols; | |
2154 | else | |
2155 | symlist = &file_symbols; | |
2156 | osyms = *symlist; | |
2157 | o_nsyms = osyms ? osyms->nsyms : 0; | |
2158 | ||
2159 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
2160 | { | |
2161 | read_one_sym (ms, &sub_sym, &sub_aux); | |
2162 | name = ms->c_name; | |
2163 | name = EXTERNAL_NAME (name, current_objfile->obfd); | |
2164 | ||
2165 | switch (ms->c_sclass) | |
2166 | { | |
2167 | case C_MOE: | |
2168 | sym = (struct symbol *) obstack_alloc | |
2169 | (¤t_objfile->symbol_obstack, | |
2170 | sizeof (struct symbol)); | |
2171 | memset (sym, 0, sizeof (struct symbol)); | |
2172 | ||
2173 | SYMBOL_NAME (sym) = | |
2174 | obsavestring (name, strlen (name), | |
2175 | ¤t_objfile->symbol_obstack); | |
2176 | SYMBOL_CLASS (sym) = LOC_CONST; | |
2177 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2178 | SYMBOL_VALUE (sym) = ms->c_value; | |
2179 | add_symbol_to_list (sym, symlist); | |
2180 | nsyms++; | |
2181 | break; | |
2182 | ||
2183 | case C_EOS: | |
2184 | /* Sometimes the linker (on 386/ix 2.0.2 at least) screws | |
2185 | up the count of how many symbols to read. So stop | |
2186 | on .eos. */ | |
2187 | done = 1; | |
2188 | break; | |
2189 | } | |
2190 | } | |
2191 | ||
2192 | /* Now fill in the fields of the type-structure. */ | |
2193 | ||
2194 | if (length > 0) | |
2195 | TYPE_LENGTH (type) = length; | |
2196 | else | |
2197 | TYPE_LENGTH (type) = TARGET_INT_BIT / TARGET_CHAR_BIT; /* Assume ints */ | |
2198 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
2199 | TYPE_NFIELDS (type) = nsyms; | |
2200 | TYPE_FIELDS (type) = (struct field *) | |
2201 | TYPE_ALLOC (type, sizeof (struct field) * nsyms); | |
2202 | ||
2203 | /* Find the symbols for the values and put them into the type. | |
2204 | The symbols can be found in the symlist that we put them on | |
2205 | to cause them to be defined. osyms contains the old value | |
2206 | of that symlist; everything up to there was defined by us. */ | |
2207 | /* Note that we preserve the order of the enum constants, so | |
2208 | that in something like "enum {FOO, LAST_THING=FOO}" we print | |
2209 | FOO, not LAST_THING. */ | |
2210 | ||
2211 | for (syms = *symlist, n = 0; syms; syms = syms->next) | |
2212 | { | |
2213 | int j = 0; | |
2214 | ||
2215 | if (syms == osyms) | |
2216 | j = o_nsyms; | |
2217 | for (; j < syms->nsyms; j++,n++) | |
2218 | { | |
2219 | struct symbol *xsym = syms->symbol[j]; | |
2220 | SYMBOL_TYPE (xsym) = type; | |
2221 | TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym); | |
2222 | TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym); | |
2223 | if (SYMBOL_VALUE (xsym) < 0) | |
2224 | unsigned_enum = 0; | |
2225 | TYPE_FIELD_BITSIZE (type, n) = 0; | |
2226 | } | |
2227 | if (syms == osyms) | |
2228 | break; | |
2229 | } | |
2230 | ||
2231 | if (unsigned_enum) | |
2232 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; | |
2233 | ||
2234 | return type; | |
2235 | } | |
2236 | ||
2237 | /* Register our ability to parse symbols for coff BFD files. */ | |
2238 | ||
2239 | static struct sym_fns coff_sym_fns = | |
2240 | { | |
2241 | bfd_target_coff_flavour, | |
2242 | coff_new_init, /* sym_new_init: init anything gbl to entire symtab */ | |
2243 | coff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
2244 | coff_symfile_read, /* sym_read: read a symbol file into symtab */ | |
2245 | coff_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
2246 | default_symfile_offsets, | |
2247 | /* sym_offsets: xlate external to internal form */ | |
2248 | NULL /* next: pointer to next struct sym_fns */ | |
2249 | }; | |
2250 | ||
2251 | void | |
2252 | _initialize_coffread () | |
2253 | { | |
2254 | add_symtab_fns (&coff_sym_fns); | |
2255 | } |