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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 | ||
c906108c SS |
87 | |
88 | /* Pointers to scratch storage, used for reading raw symbols and auxents. */ | |
89 | ||
90 | static char *temp_sym; | |
91 | static char *temp_aux; | |
92 | ||
93 | /* Local variables that hold the shift and mask values for the | |
94 | COFF file that we are currently reading. These come back to us | |
95 | from BFD, and are referenced by their macro names, as well as | |
96 | internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF | |
97 | macros from include/coff/internal.h . */ | |
98 | ||
99 | static unsigned local_n_btmask; | |
100 | static unsigned local_n_btshft; | |
101 | static unsigned local_n_tmask; | |
102 | static unsigned local_n_tshift; | |
103 | ||
104 | #define N_BTMASK local_n_btmask | |
105 | #define N_BTSHFT local_n_btshft | |
106 | #define N_TMASK local_n_tmask | |
107 | #define N_TSHIFT local_n_tshift | |
108 | ||
109 | /* Local variables that hold the sizes in the file of various COFF structures. | |
110 | (We only need to know this to read them from the file -- BFD will then | |
111 | translate the data in them, into `internal_xxx' structs in the right | |
112 | byte order, alignment, etc.) */ | |
113 | ||
114 | static unsigned local_linesz; | |
115 | static unsigned local_symesz; | |
116 | static unsigned local_auxesz; | |
117 | ||
118 | /* This is set if this is a PE format file. */ | |
119 | ||
120 | static int pe_file; | |
121 | ||
122 | /* Chain of typedefs of pointers to empty struct/union types. | |
123 | They are chained thru the SYMBOL_VALUE_CHAIN. */ | |
124 | ||
125 | static struct symbol *opaque_type_chain[HASHSIZE]; | |
126 | ||
127 | /* Complaints about various problems in the file being read */ | |
128 | ||
129 | struct complaint ef_complaint = | |
130 | {"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0}; | |
131 | ||
132 | struct complaint ef_stack_complaint = | |
133 | {"`.ef' symbol without matching `.bf' symbol ignored starting at symnum %d", 0, 0}; | |
134 | ||
135 | struct complaint eb_stack_complaint = | |
136 | {"`.eb' symbol without matching `.bb' symbol ignored starting at symnum %d", 0, 0}; | |
137 | ||
138 | struct complaint bf_no_aux_complaint = | |
139 | {"`.bf' symbol %d has no aux entry", 0, 0}; | |
140 | ||
141 | struct complaint ef_no_aux_complaint = | |
142 | {"`.ef' symbol %d has no aux entry", 0, 0}; | |
143 | ||
144 | struct complaint lineno_complaint = | |
145 | {"Line number pointer %d lower than start of line numbers", 0, 0}; | |
146 | ||
147 | struct complaint unexpected_type_complaint = | |
148 | {"Unexpected type for symbol %s", 0, 0}; | |
149 | ||
150 | struct complaint bad_sclass_complaint = | |
151 | {"Bad n_sclass for symbol %s", 0, 0}; | |
152 | ||
153 | struct complaint misordered_blocks_complaint = | |
154 | {"Blocks out of order at address %x", 0, 0}; | |
155 | ||
156 | struct complaint tagndx_bad_complaint = | |
157 | {"Symbol table entry for %s has bad tagndx value", 0, 0}; | |
158 | ||
159 | struct complaint eb_complaint = | |
160 | {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0}; | |
161 | ||
162 | /* Simplified internal version of coff symbol table information */ | |
163 | ||
164 | struct coff_symbol { | |
165 | char *c_name; | |
166 | int c_symnum; /* symbol number of this entry */ | |
167 | int c_naux; /* 0 if syment only, 1 if syment + auxent, etc */ | |
168 | long c_value; | |
169 | int c_sclass; | |
170 | int c_secnum; | |
171 | unsigned int c_type; | |
172 | }; | |
173 | ||
174 | static struct type *coff_read_struct_type PARAMS ((int, int, int)); | |
175 | ||
176 | static struct type *decode_base_type PARAMS ((struct coff_symbol *, | |
177 | unsigned int, | |
178 | union internal_auxent *)); | |
179 | ||
180 | static struct type *decode_type PARAMS ((struct coff_symbol *, unsigned int, | |
181 | union internal_auxent *)); | |
182 | ||
183 | static struct type *decode_function_type PARAMS ((struct coff_symbol *, | |
184 | unsigned int, | |
185 | union internal_auxent *)); | |
186 | ||
187 | static struct type *coff_read_enum_type PARAMS ((int, int, int)); | |
188 | ||
189 | static struct symbol *process_coff_symbol PARAMS ((struct coff_symbol *, | |
190 | union internal_auxent *, | |
191 | struct section_offsets *, | |
192 | struct objfile *)); | |
193 | ||
194 | static void patch_opaque_types PARAMS ((struct symtab *)); | |
195 | ||
196 | static void patch_type PARAMS ((struct type *, struct type *)); | |
197 | ||
198 | static void enter_linenos PARAMS ((long, int, int, struct section_offsets *)); | |
199 | ||
200 | static void free_linetab PARAMS ((void)); | |
201 | ||
202 | static int init_lineno PARAMS ((bfd *, long, int)); | |
203 | ||
204 | static char *getsymname PARAMS ((struct internal_syment *)); | |
205 | ||
206 | static char *coff_getfilename PARAMS ((union internal_auxent *)); | |
207 | ||
208 | static void free_stringtab PARAMS ((void)); | |
209 | ||
210 | static int init_stringtab PARAMS ((bfd *, long)); | |
211 | ||
212 | static void read_one_sym PARAMS ((struct coff_symbol *, | |
213 | struct internal_syment *, | |
214 | union internal_auxent *)); | |
215 | ||
216 | static void coff_symtab_read PARAMS ((long, int, struct section_offsets *, | |
217 | struct objfile *)); | |
218 | ||
219 | static void find_linenos PARAMS ((bfd *, sec_ptr, PTR)); | |
220 | ||
221 | static void coff_symfile_init PARAMS ((struct objfile *)); | |
222 | ||
223 | static void coff_new_init PARAMS ((struct objfile *)); | |
224 | ||
225 | static void coff_symfile_read PARAMS ((struct objfile *, | |
226 | struct section_offsets *, int)); | |
227 | ||
228 | static void coff_symfile_finish PARAMS ((struct objfile *)); | |
229 | ||
230 | static void record_minimal_symbol PARAMS ((char *, CORE_ADDR, | |
231 | enum minimal_symbol_type, | |
232 | struct objfile *)); | |
233 | ||
234 | static void coff_end_symtab PARAMS ((struct objfile *)); | |
235 | ||
236 | static void complete_symtab PARAMS ((char *, CORE_ADDR, unsigned int)); | |
237 | ||
238 | static void coff_start_symtab PARAMS ((char *)); | |
239 | ||
c906108c SS |
240 | static struct type *coff_alloc_type PARAMS ((int)); |
241 | ||
242 | static struct type **coff_lookup_type PARAMS ((int)); | |
243 | ||
244 | static void coff_locate_sections PARAMS ((bfd *, asection *, PTR)); | |
245 | \f | |
246 | /* We are called once per section from coff_symfile_read. We | |
247 | need to examine each section we are passed, check to see | |
248 | if it is something we are interested in processing, and | |
249 | if so, stash away some access information for the section. | |
250 | ||
251 | FIXME: The section names should not be hardwired strings (what | |
252 | should they be? I don't think most object file formats have enough | |
253 | section flags to specify what kind of debug section it is | |
254 | -kingdon). */ | |
255 | ||
256 | static void | |
257 | coff_locate_sections (abfd, sectp, csip) | |
258 | bfd *abfd; | |
259 | asection *sectp; | |
260 | PTR csip; | |
261 | { | |
262 | register struct coff_symfile_info *csi; | |
263 | const char *name; | |
264 | ||
265 | csi = (struct coff_symfile_info *) csip; | |
266 | name = bfd_get_section_name (abfd, sectp); | |
267 | if (STREQ (name, ".text")) | |
268 | { | |
269 | csi->textaddr = bfd_section_vma (abfd, sectp); | |
270 | csi->textsize += bfd_section_size (abfd, sectp); | |
271 | } | |
272 | else if (strncmp (name, ".text", sizeof ".text" - 1) == 0) | |
273 | { | |
274 | csi->textsize += bfd_section_size (abfd, sectp); | |
275 | } | |
276 | else if (STREQ (name, ".stabstr")) | |
277 | { | |
278 | csi->stabstrsect = sectp; | |
279 | } | |
280 | else if (strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
281 | { | |
282 | const char *s; | |
283 | ||
284 | /* We can have multiple .stab sections if linked with | |
285 | --split-by-reloc. */ | |
286 | for (s = name + sizeof ".stab" - 1; *s != '\0'; s++) | |
287 | if (! isdigit (*s)) | |
288 | break; | |
289 | if (*s == '\0') | |
290 | { | |
291 | struct stab_section_list *n, **pn; | |
292 | ||
293 | n = ((struct stab_section_list *) | |
294 | xmalloc (sizeof (struct stab_section_list))); | |
295 | n->section = sectp; | |
296 | n->next = NULL; | |
297 | for (pn = &csi->stabsects; *pn != NULL; pn = &(*pn)->next) | |
298 | ; | |
299 | *pn = n; | |
300 | ||
301 | /* This will be run after coffstab_build_psymtabs is called | |
302 | in coff_symfile_read, at which point we no longer need | |
303 | the information. */ | |
304 | make_cleanup (free, n); | |
305 | } | |
306 | } | |
307 | } | |
308 | ||
309 | /* Return the section_offsets* that CS points to. */ | |
310 | static int cs_to_section PARAMS ((struct coff_symbol *, struct objfile *)); | |
311 | ||
312 | struct find_targ_sec_arg { | |
313 | int targ_index; | |
314 | asection **resultp; | |
315 | }; | |
316 | ||
317 | static void find_targ_sec PARAMS ((bfd *, asection *, void *)); | |
318 | ||
319 | static void find_targ_sec (abfd, sect, obj) | |
320 | bfd *abfd; | |
321 | asection *sect; | |
322 | PTR obj; | |
323 | { | |
324 | struct find_targ_sec_arg *args = (struct find_targ_sec_arg *)obj; | |
325 | if (sect->target_index == args->targ_index) | |
326 | *args->resultp = sect; | |
327 | } | |
328 | ||
329 | /* Return the section number (SECT_OFF_*) that CS points to. */ | |
330 | static int | |
331 | cs_to_section (cs, objfile) | |
332 | struct coff_symbol *cs; | |
333 | struct objfile *objfile; | |
334 | { | |
335 | asection *sect = NULL; | |
336 | struct find_targ_sec_arg args; | |
337 | int off = SECT_OFF_TEXT; | |
338 | ||
339 | args.targ_index = cs->c_secnum; | |
340 | args.resultp = § | |
341 | bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); | |
342 | if (sect != NULL) | |
343 | { | |
344 | /* This is the section. Figure out what SECT_OFF_* code it is. */ | |
345 | if (bfd_get_section_flags (abfd, sect) & SEC_CODE) | |
346 | off = SECT_OFF_TEXT; | |
347 | else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD) | |
348 | off = SECT_OFF_DATA; | |
349 | else | |
350 | off = SECT_OFF_BSS; | |
351 | } | |
352 | return off; | |
353 | } | |
354 | ||
355 | /* Return the address of the section of a COFF symbol. */ | |
356 | ||
357 | static CORE_ADDR cs_section_address PARAMS ((struct coff_symbol *, bfd *)); | |
358 | ||
359 | static CORE_ADDR | |
360 | cs_section_address (cs, abfd) | |
361 | struct coff_symbol *cs; | |
362 | bfd *abfd; | |
363 | { | |
364 | asection *sect = NULL; | |
365 | struct find_targ_sec_arg args; | |
366 | CORE_ADDR addr = 0; | |
367 | ||
368 | args.targ_index = cs->c_secnum; | |
369 | args.resultp = § | |
370 | bfd_map_over_sections (abfd, find_targ_sec, &args); | |
371 | if (sect != NULL) | |
372 | addr = bfd_get_section_vma (objfile->obfd, sect); | |
373 | return addr; | |
374 | } | |
375 | ||
376 | /* Look up a coff type-number index. Return the address of the slot | |
377 | where the type for that index is stored. | |
378 | The type-number is in INDEX. | |
379 | ||
380 | This can be used for finding the type associated with that index | |
381 | or for associating a new type with the index. */ | |
382 | ||
383 | static struct type ** | |
384 | coff_lookup_type (index) | |
385 | register int index; | |
386 | { | |
387 | if (index >= type_vector_length) | |
388 | { | |
389 | int old_vector_length = type_vector_length; | |
390 | ||
391 | type_vector_length *= 2; | |
392 | if (index /* is still */ >= type_vector_length) | |
393 | type_vector_length = index * 2; | |
394 | ||
395 | type_vector = (struct type **) | |
396 | xrealloc ((char *) type_vector, | |
397 | type_vector_length * sizeof (struct type *)); | |
398 | memset (&type_vector[old_vector_length], 0, | |
399 | (type_vector_length - old_vector_length) * sizeof(struct type *)); | |
400 | } | |
401 | return &type_vector[index]; | |
402 | } | |
403 | ||
404 | /* Make sure there is a type allocated for type number index | |
405 | and return the type object. | |
406 | This can create an empty (zeroed) type object. */ | |
407 | ||
408 | static struct type * | |
409 | coff_alloc_type (index) | |
410 | int index; | |
411 | { | |
412 | register struct type **type_addr = coff_lookup_type (index); | |
413 | register struct type *type = *type_addr; | |
414 | ||
415 | /* If we are referring to a type not known at all yet, | |
416 | allocate an empty type for it. | |
417 | We will fill it in later if we find out how. */ | |
418 | if (type == NULL) | |
419 | { | |
420 | type = alloc_type (current_objfile); | |
421 | *type_addr = type; | |
422 | } | |
423 | return type; | |
424 | } | |
425 | \f | |
c906108c SS |
426 | /* Start a new symtab for a new source file. |
427 | This is called when a COFF ".file" symbol is seen; | |
428 | it indicates the start of data for one original source file. */ | |
429 | ||
430 | static void | |
431 | coff_start_symtab (name) | |
432 | char *name; | |
433 | { | |
434 | start_symtab ( | |
435 | /* We fill in the filename later. start_symtab puts | |
436 | this pointer into last_source_file and we put it in | |
437 | subfiles->name, which end_symtab frees; that's why | |
438 | it must be malloc'd. */ | |
439 | savestring (name, strlen(name)), | |
440 | /* We never know the directory name for COFF. */ | |
441 | NULL, | |
442 | /* The start address is irrelevant, since we set | |
443 | last_source_start_addr in coff_end_symtab. */ | |
444 | 0); | |
445 | record_debugformat ("COFF"); | |
c906108c SS |
446 | } |
447 | ||
448 | /* Save the vital information from when starting to read a file, | |
449 | for use when closing off the current file. | |
450 | NAME is the file name the symbols came from, START_ADDR is the first | |
451 | text address for the file, and SIZE is the number of bytes of text. */ | |
452 | ||
453 | static void | |
454 | complete_symtab (name, start_addr, size) | |
455 | char *name; | |
456 | CORE_ADDR start_addr; | |
457 | unsigned int size; | |
458 | { | |
459 | if (last_source_file != NULL) | |
460 | free (last_source_file); | |
461 | last_source_file = savestring (name, strlen (name)); | |
462 | current_source_start_addr = start_addr; | |
463 | current_source_end_addr = start_addr + size; | |
464 | ||
465 | if (current_objfile -> ei.entry_point >= current_source_start_addr && | |
466 | current_objfile -> ei.entry_point < current_source_end_addr) | |
467 | { | |
468 | current_objfile -> ei.entry_file_lowpc = current_source_start_addr; | |
469 | current_objfile -> ei.entry_file_highpc = current_source_end_addr; | |
470 | } | |
471 | } | |
472 | ||
473 | /* Finish the symbol definitions for one main source file, | |
474 | close off all the lexical contexts for that file | |
475 | (creating struct block's for them), then make the | |
476 | struct symtab for that file and put it in the list of all such. */ | |
477 | ||
478 | static void | |
479 | coff_end_symtab (objfile) | |
480 | struct objfile *objfile; | |
481 | { | |
482 | struct symtab *symtab; | |
483 | ||
484 | last_source_start_addr = current_source_start_addr; | |
485 | ||
c906108c SS |
486 | symtab = end_symtab (current_source_end_addr, objfile, 0); |
487 | ||
488 | if (symtab != NULL) | |
489 | free_named_symtabs (symtab->filename); | |
490 | ||
491 | /* Reinitialize for beginning of new file. */ | |
c906108c SS |
492 | last_source_file = NULL; |
493 | } | |
494 | \f | |
495 | static void | |
496 | record_minimal_symbol (name, address, type, objfile) | |
497 | char *name; | |
498 | CORE_ADDR address; | |
499 | enum minimal_symbol_type type; | |
500 | struct objfile *objfile; | |
501 | { | |
502 | /* We don't want TDESC entry points in the minimal symbol table */ | |
503 | if (name[0] == '@') return; | |
504 | ||
505 | prim_record_minimal_symbol (name, address, type, objfile); | |
506 | } | |
507 | \f | |
508 | /* coff_symfile_init () | |
509 | is the coff-specific initialization routine for reading symbols. | |
510 | It is passed a struct objfile which contains, among other things, | |
511 | the BFD for the file whose symbols are being read, and a slot for | |
512 | a pointer to "private data" which we fill with cookies and other | |
513 | treats for coff_symfile_read (). | |
514 | ||
515 | We will only be called if this is a COFF or COFF-like file. | |
516 | BFD handles figuring out the format of the file, and code in symtab.c | |
517 | uses BFD's determination to vector to us. | |
518 | ||
519 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ | |
520 | ||
521 | static void | |
522 | coff_symfile_init (objfile) | |
523 | struct objfile *objfile; | |
524 | { | |
525 | /* Allocate struct to keep track of stab reading. */ | |
526 | objfile->sym_stab_info = (struct dbx_symfile_info *) | |
527 | xmmalloc (objfile->md, sizeof (struct dbx_symfile_info)); | |
528 | ||
529 | memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info)); | |
530 | ||
531 | /* Allocate struct to keep track of the symfile */ | |
532 | objfile->sym_private = xmmalloc (objfile->md, | |
533 | sizeof (struct coff_symfile_info)); | |
534 | ||
535 | memset (objfile->sym_private, 0, sizeof (struct coff_symfile_info)); | |
536 | ||
537 | /* COFF objects may be reordered, so set OBJF_REORDERED. If we | |
538 | find this causes a significant slowdown in gdb then we could | |
539 | set it in the debug symbol readers only when necessary. */ | |
540 | objfile->flags |= OBJF_REORDERED; | |
541 | ||
542 | init_entry_point_info (objfile); | |
543 | } | |
544 | ||
545 | /* This function is called for every section; it finds the outer limits | |
546 | of the line table (minimum and maximum file offset) so that the | |
547 | mainline code can read the whole thing for efficiency. */ | |
548 | ||
549 | /* ARGSUSED */ | |
550 | static void | |
551 | find_linenos (abfd, asect, vpinfo) | |
552 | bfd *abfd; | |
553 | sec_ptr asect; | |
554 | PTR vpinfo; | |
555 | { | |
556 | struct coff_symfile_info *info; | |
557 | int size, count; | |
558 | file_ptr offset, maxoff; | |
559 | ||
560 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
561 | count = asect->lineno_count; | |
562 | /* End of warning */ | |
563 | ||
564 | if (count == 0) | |
565 | return; | |
566 | size = count * local_linesz; | |
567 | ||
568 | info = (struct coff_symfile_info *)vpinfo; | |
569 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
570 | offset = asect->line_filepos; | |
571 | /* End of warning */ | |
572 | ||
573 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) | |
574 | info->min_lineno_offset = offset; | |
575 | ||
576 | maxoff = offset + size; | |
577 | if (maxoff > info->max_lineno_offset) | |
578 | info->max_lineno_offset = maxoff; | |
579 | } | |
580 | ||
581 | ||
582 | /* The BFD for this file -- only good while we're actively reading | |
583 | symbols into a psymtab or a symtab. */ | |
584 | ||
585 | static bfd *symfile_bfd; | |
586 | ||
587 | /* Read a symbol file, after initialization by coff_symfile_init. */ | |
588 | ||
589 | /* ARGSUSED */ | |
590 | static void | |
591 | coff_symfile_read (objfile, section_offsets, mainline) | |
592 | struct objfile *objfile; | |
593 | struct section_offsets *section_offsets; | |
594 | int mainline; | |
595 | { | |
596 | struct coff_symfile_info *info; | |
597 | struct dbx_symfile_info *dbxinfo; | |
598 | bfd *abfd = objfile->obfd; | |
599 | coff_data_type *cdata = coff_data (abfd); | |
600 | char *name = bfd_get_filename (abfd); | |
601 | register int val; | |
602 | int num_symbols; | |
603 | int symtab_offset; | |
604 | int stringtab_offset; | |
605 | struct cleanup *back_to; | |
606 | int stabstrsize; | |
607 | ||
608 | info = (struct coff_symfile_info *) objfile -> sym_private; | |
609 | dbxinfo = objfile->sym_stab_info; | |
610 | symfile_bfd = abfd; /* Kludge for swap routines */ | |
611 | ||
612 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
613 | num_symbols = bfd_get_symcount (abfd); /* How many syms */ | |
614 | symtab_offset = cdata->sym_filepos; /* Symbol table file offset */ | |
615 | stringtab_offset = symtab_offset + /* String table file offset */ | |
616 | num_symbols * cdata->local_symesz; | |
617 | ||
618 | /* Set a few file-statics that give us specific information about | |
619 | the particular COFF file format we're reading. */ | |
c906108c SS |
620 | local_n_btmask = cdata->local_n_btmask; |
621 | local_n_btshft = cdata->local_n_btshft; | |
622 | local_n_tmask = cdata->local_n_tmask; | |
623 | local_n_tshift = cdata->local_n_tshift; | |
624 | local_linesz = cdata->local_linesz; | |
625 | local_symesz = cdata->local_symesz; | |
626 | local_auxesz = cdata->local_auxesz; | |
627 | ||
628 | /* Allocate space for raw symbol and aux entries, based on their | |
629 | space requirements as reported by BFD. */ | |
630 | temp_sym = (char *) xmalloc | |
631 | (cdata->local_symesz + cdata->local_auxesz); | |
632 | temp_aux = temp_sym + cdata->local_symesz; | |
633 | back_to = make_cleanup ((make_cleanup_func) free_current_contents, &temp_sym); | |
634 | ||
635 | /* We need to know whether this is a PE file, because in PE files, | |
636 | unlike standard COFF files, symbol values are stored as offsets | |
637 | from the section address, rather than as absolute addresses. | |
638 | FIXME: We should use BFD to read the symbol table, and thus avoid | |
639 | this problem. */ | |
640 | pe_file = strncmp (bfd_get_target (objfile->obfd), "pe", 2) == 0; | |
641 | ||
642 | /* End of warning */ | |
643 | ||
644 | /* Read the line number table, all at once. */ | |
645 | info->min_lineno_offset = 0; | |
646 | info->max_lineno_offset = 0; | |
647 | bfd_map_over_sections (abfd, find_linenos, (PTR) info); | |
648 | ||
649 | make_cleanup ((make_cleanup_func) free_linetab, 0); | |
650 | val = init_lineno (abfd, info->min_lineno_offset, | |
651 | info->max_lineno_offset - info->min_lineno_offset); | |
652 | if (val < 0) | |
653 | error ("\"%s\": error reading line numbers\n", name); | |
654 | ||
655 | /* Now read the string table, all at once. */ | |
656 | ||
657 | make_cleanup ((make_cleanup_func) free_stringtab, 0); | |
658 | val = init_stringtab (abfd, stringtab_offset); | |
659 | if (val < 0) | |
660 | error ("\"%s\": can't get string table", name); | |
661 | ||
662 | init_minimal_symbol_collection (); | |
663 | make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0); | |
664 | ||
665 | /* Now that the executable file is positioned at symbol table, | |
666 | process it and define symbols accordingly. */ | |
667 | ||
668 | coff_symtab_read ((long) symtab_offset, num_symbols, section_offsets, | |
669 | objfile); | |
670 | ||
671 | /* Sort symbols alphabetically within each block. */ | |
672 | ||
673 | { | |
674 | struct symtab *s; | |
675 | ||
676 | for (s = objfile -> symtabs; s != NULL; s = s -> next) | |
677 | sort_symtab_syms (s); | |
678 | } | |
679 | ||
680 | /* Install any minimal symbols that have been collected as the current | |
681 | minimal symbols for this objfile. */ | |
682 | ||
683 | install_minimal_symbols (objfile); | |
684 | ||
685 | bfd_map_over_sections (abfd, coff_locate_sections, (PTR) info); | |
686 | ||
687 | if (info->stabsects) | |
688 | { | |
689 | /* FIXME: dubious. Why can't we use something normal like | |
690 | bfd_get_section_contents? */ | |
691 | bfd_seek (abfd, abfd->where, 0); | |
692 | ||
693 | stabstrsize = bfd_section_size (abfd, info->stabstrsect); | |
694 | ||
695 | coffstab_build_psymtabs (objfile, | |
696 | section_offsets, | |
697 | mainline, | |
698 | info->textaddr, info->textsize, | |
699 | info->stabsects, | |
700 | info->stabstrsect->filepos, stabstrsize); | |
701 | } | |
702 | ||
703 | do_cleanups (back_to); | |
704 | } | |
705 | ||
706 | static void | |
707 | coff_new_init (ignore) | |
708 | struct objfile *ignore; | |
709 | { | |
710 | } | |
711 | ||
712 | /* Perform any local cleanups required when we are done with a particular | |
713 | objfile. I.E, we are in the process of discarding all symbol information | |
714 | for an objfile, freeing up all memory held for it, and unlinking the | |
715 | objfile struct from the global list of known objfiles. */ | |
716 | ||
717 | static void | |
718 | coff_symfile_finish (objfile) | |
719 | struct objfile *objfile; | |
720 | { | |
721 | if (objfile -> sym_private != NULL) | |
722 | { | |
723 | mfree (objfile -> md, objfile -> sym_private); | |
724 | } | |
725 | } | |
726 | ||
727 | \f | |
728 | /* Given pointers to a symbol table in coff style exec file, | |
729 | analyze them and create struct symtab's describing the symbols. | |
730 | NSYMS is the number of symbols in the symbol table. | |
731 | We read them one at a time using read_one_sym (). */ | |
732 | ||
733 | static void | |
734 | coff_symtab_read (symtab_offset, nsyms, section_offsets, objfile) | |
735 | long symtab_offset; | |
736 | int nsyms; | |
737 | struct section_offsets *section_offsets; | |
738 | struct objfile *objfile; | |
739 | { | |
740 | register struct context_stack *new; | |
741 | struct coff_symbol coff_symbol; | |
742 | register struct coff_symbol *cs = &coff_symbol; | |
743 | static struct internal_syment main_sym; | |
744 | static union internal_auxent main_aux; | |
745 | struct coff_symbol fcn_cs_saved; | |
746 | static struct internal_syment fcn_sym_saved; | |
747 | static union internal_auxent fcn_aux_saved; | |
748 | struct symtab *s; | |
749 | /* A .file is open. */ | |
750 | int in_source_file = 0; | |
751 | int next_file_symnum = -1; | |
752 | /* Name of the current file. */ | |
753 | char *filestring = ""; | |
754 | int depth = 0; | |
755 | int fcn_first_line = 0; | |
756 | int fcn_last_line = 0; | |
757 | int fcn_start_addr = 0; | |
758 | long fcn_line_ptr = 0; | |
759 | int val; | |
760 | CORE_ADDR tmpaddr; | |
761 | ||
762 | /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous.... | |
763 | it's hard to know I've really worked around it. The fix should be | |
764 | harmless, anyway). The symptom of the bug is that the first | |
765 | fread (in read_one_sym), will (in my example) actually get data | |
766 | from file offset 268, when the fseek was to 264 (and ftell shows | |
767 | 264). This causes all hell to break loose. I was unable to | |
768 | reproduce this on a short test program which operated on the same | |
769 | file, performing (I think) the same sequence of operations. | |
770 | ||
771 | It stopped happening when I put in this (former) rewind(). | |
772 | ||
773 | FIXME: Find out if this has been reported to Sun, whether it has | |
774 | been fixed in a later release, etc. */ | |
775 | ||
776 | bfd_seek (objfile->obfd, 0, 0); | |
777 | ||
778 | /* Position to read the symbol table. */ | |
779 | val = bfd_seek (objfile->obfd, (long) symtab_offset, 0); | |
780 | if (val < 0) | |
781 | perror_with_name (objfile->name); | |
782 | ||
783 | current_objfile = objfile; | |
784 | nlist_bfd_global = objfile->obfd; | |
785 | nlist_nsyms_global = nsyms; | |
786 | last_source_file = NULL; | |
787 | memset (opaque_type_chain, 0, sizeof opaque_type_chain); | |
788 | ||
789 | if (type_vector) /* Get rid of previous one */ | |
790 | free ((PTR) type_vector); | |
791 | type_vector_length = 160; | |
792 | type_vector = (struct type **) | |
793 | xmalloc (type_vector_length * sizeof (struct type *)); | |
794 | memset (type_vector, 0, type_vector_length * sizeof (struct type *)); | |
795 | ||
796 | coff_start_symtab (""); | |
797 | ||
798 | symnum = 0; | |
799 | while (symnum < nsyms) | |
800 | { | |
801 | QUIT; /* Make this command interruptable. */ | |
802 | ||
803 | read_one_sym (cs, &main_sym, &main_aux); | |
804 | ||
805 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) | |
806 | { | |
807 | if (last_source_file) | |
808 | coff_end_symtab (objfile); | |
809 | ||
810 | coff_start_symtab ("_globals_"); | |
811 | complete_symtab ("_globals_", 0, 0); | |
812 | /* done with all files, everything from here on out is globals */ | |
813 | } | |
814 | ||
815 | /* Special case for file with type declarations only, no text. */ | |
816 | if (!last_source_file && SDB_TYPE (cs->c_type) | |
817 | && cs->c_secnum == N_DEBUG) | |
818 | complete_symtab (filestring, 0, 0); | |
819 | ||
820 | /* Typedefs should not be treated as symbol definitions. */ | |
821 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) | |
822 | { | |
823 | /* Record all functions -- external and static -- in minsyms. */ | |
824 | tmpaddr = cs->c_value + ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
825 | record_minimal_symbol (cs->c_name, tmpaddr, mst_text, objfile); | |
826 | ||
827 | fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; | |
828 | fcn_start_addr = tmpaddr; | |
829 | fcn_cs_saved = *cs; | |
830 | fcn_sym_saved = main_sym; | |
831 | fcn_aux_saved = main_aux; | |
832 | continue; | |
833 | } | |
834 | ||
835 | switch (cs->c_sclass) | |
836 | { | |
837 | case C_EFCN: | |
838 | case C_EXTDEF: | |
839 | case C_ULABEL: | |
840 | case C_USTATIC: | |
841 | case C_LINE: | |
842 | case C_ALIAS: | |
843 | case C_HIDDEN: | |
844 | complain (&bad_sclass_complaint, cs->c_name); | |
845 | break; | |
846 | ||
847 | case C_FILE: | |
848 | /* c_value field contains symnum of next .file entry in table | |
849 | or symnum of first global after last .file. */ | |
850 | next_file_symnum = cs->c_value; | |
851 | if (cs->c_naux > 0) | |
852 | filestring = coff_getfilename (&main_aux); | |
853 | else | |
854 | filestring = ""; | |
855 | ||
856 | /* Complete symbol table for last object file | |
857 | containing debugging information. */ | |
858 | if (last_source_file) | |
859 | { | |
860 | coff_end_symtab (objfile); | |
861 | coff_start_symtab (filestring); | |
862 | } | |
863 | in_source_file = 1; | |
864 | break; | |
865 | ||
866 | /* C_LABEL is used for labels and static functions. Including | |
867 | it here allows gdb to see static functions when no debug | |
868 | info is available. */ | |
869 | case C_LABEL: | |
870 | /* However, labels within a function can make weird backtraces, | |
871 | so filter them out (from phdm@macqel.be). */ | |
872 | if (within_function) | |
873 | break; | |
874 | case C_STAT: | |
875 | case C_THUMBLABEL: | |
876 | case C_THUMBSTAT: | |
877 | case C_THUMBSTATFUNC: | |
878 | if (cs->c_name[0] == '.') | |
879 | { | |
880 | if (STREQ (cs->c_name, ".text")) { | |
881 | /* FIXME: don't wire in ".text" as section name | |
882 | or symbol name! */ | |
883 | /* Check for in_source_file deals with case of | |
884 | a file with debugging symbols | |
885 | followed by a later file with no symbols. */ | |
886 | if (in_source_file) | |
887 | complete_symtab (filestring, | |
888 | cs->c_value + ANOFFSET (section_offsets, SECT_OFF_TEXT), | |
889 | main_aux.x_scn.x_scnlen); | |
890 | in_source_file = 0; | |
891 | } | |
892 | /* flush rest of '.' symbols */ | |
893 | break; | |
894 | } | |
895 | else if (!SDB_TYPE (cs->c_type) | |
896 | && cs->c_name[0] == 'L' | |
897 | && (strncmp (cs->c_name, "LI%", 3) == 0 | |
898 | || strncmp (cs->c_name, "LF%", 3) == 0 | |
899 | || strncmp (cs->c_name,"LC%",3) == 0 | |
900 | || strncmp (cs->c_name,"LP%",3) == 0 | |
901 | || strncmp (cs->c_name,"LPB%",4) == 0 | |
902 | || strncmp (cs->c_name,"LBB%",4) == 0 | |
903 | || strncmp (cs->c_name,"LBE%",4) == 0 | |
904 | || strncmp (cs->c_name,"LPBX%",5) == 0)) | |
905 | /* At least on a 3b1, gcc generates swbeg and string labels | |
906 | that look like this. Ignore them. */ | |
907 | break; | |
908 | /* fall in for static symbols that don't start with '.' */ | |
909 | case C_THUMBEXT: | |
910 | case C_THUMBEXTFUNC: | |
911 | case C_EXT: | |
912 | { | |
913 | /* Record it in the minimal symbols regardless of | |
914 | SDB_TYPE. This parallels what we do for other debug | |
915 | formats, and probably is needed to make | |
916 | print_address_symbolic work right without the (now | |
917 | gone) "set fast-symbolic-addr off" kludge. */ | |
918 | ||
919 | /* FIXME: should use mst_abs, and not relocate, if absolute. */ | |
920 | enum minimal_symbol_type ms_type; | |
921 | int sec; | |
922 | ||
923 | if (cs->c_secnum == N_UNDEF) | |
924 | { | |
925 | /* This is a common symbol. See if the target | |
926 | environment knows where it has been relocated to. */ | |
927 | CORE_ADDR reladdr; | |
928 | if (target_lookup_symbol (cs->c_name, &reladdr)) | |
929 | { | |
930 | /* Error in lookup; ignore symbol. */ | |
931 | break; | |
932 | } | |
933 | tmpaddr = reladdr; | |
934 | /* The address has already been relocated; make sure that | |
935 | objfile_relocate doesn't relocate it again. */ | |
936 | sec = -2; | |
937 | ms_type = cs->c_sclass == C_EXT | |
938 | || cs->c_sclass == C_THUMBEXT ? | |
939 | mst_bss : mst_file_bss; | |
940 | } | |
941 | else | |
942 | { | |
943 | sec = cs_to_section (cs, objfile); | |
944 | tmpaddr = cs->c_value; | |
945 | if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC | |
946 | || cs->c_sclass == C_THUMBEXT) | |
947 | tmpaddr += ANOFFSET (section_offsets, sec); | |
948 | ||
949 | switch (sec) | |
950 | { | |
951 | case SECT_OFF_TEXT: | |
952 | case SECT_OFF_RODATA: | |
953 | ms_type = | |
954 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC | |
955 | || cs->c_sclass == C_THUMBEXT ? | |
956 | mst_text : mst_file_text; | |
957 | #ifdef SMASH_TEXT_ADDRESS | |
958 | if (tmpaddr & 1) /* FIXME: delete this line */ | |
959 | SMASH_TEXT_ADDRESS (tmpaddr); | |
960 | #endif | |
961 | break; | |
962 | case SECT_OFF_DATA: | |
963 | ms_type = | |
964 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? | |
965 | mst_data : mst_file_data; | |
966 | break; | |
967 | case SECT_OFF_BSS: | |
968 | ms_type = | |
969 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? | |
970 | mst_data : mst_file_data; | |
971 | break; | |
972 | default: | |
973 | ms_type = mst_unknown; | |
974 | break; | |
975 | } | |
976 | } | |
977 | ||
978 | if (cs->c_name[0] != '@' /* Skip tdesc symbols */) | |
979 | { | |
980 | struct minimal_symbol *msym; | |
981 | ||
982 | msym = prim_record_minimal_symbol_and_info | |
983 | (cs->c_name, tmpaddr, ms_type, (char *)cs->c_sclass, sec, | |
984 | NULL, objfile); | |
985 | #ifdef COFF_MAKE_MSYMBOL_SPECIAL | |
986 | if(msym) | |
987 | COFF_MAKE_MSYMBOL_SPECIAL(cs->c_sclass, msym); | |
988 | #endif | |
989 | } | |
990 | if (SDB_TYPE (cs->c_type)) | |
991 | { | |
992 | struct symbol *sym; | |
993 | sym = process_coff_symbol | |
994 | (cs, &main_aux, section_offsets, objfile); | |
995 | SYMBOL_VALUE (sym) = tmpaddr; | |
996 | SYMBOL_SECTION (sym) = sec; | |
997 | } | |
998 | } | |
999 | break; | |
1000 | ||
1001 | case C_FCN: | |
1002 | if (STREQ (cs->c_name, ".bf")) | |
1003 | { | |
1004 | within_function = 1; | |
1005 | ||
1006 | /* value contains address of first non-init type code */ | |
1007 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1008 | contains line number of '{' } */ | |
1009 | if (cs->c_naux != 1) | |
1010 | complain (&bf_no_aux_complaint, cs->c_symnum); | |
1011 | fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1012 | ||
1013 | /* Might want to check that locals are 0 and | |
1014 | context_stack_depth is zero, and complain if not. */ | |
1015 | ||
1016 | depth = 0; | |
1017 | new = push_context (depth, fcn_start_addr); | |
1018 | fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); | |
1019 | new->name = | |
1020 | process_coff_symbol (&fcn_cs_saved, &fcn_aux_saved, | |
1021 | section_offsets, objfile); | |
7a292a7a | 1022 | record_line (current_subfile, fcn_first_line, cs->c_value); |
c906108c SS |
1023 | } |
1024 | else if (STREQ (cs->c_name, ".ef")) | |
1025 | { | |
1026 | /* the value of .ef is the address of epilogue code; | |
1027 | not useful for gdb. */ | |
1028 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1029 | contains number of lines to '}' */ | |
1030 | ||
1031 | if (context_stack_depth <= 0) | |
1032 | { /* We attempted to pop an empty context stack */ | |
1033 | complain (&ef_stack_complaint, cs->c_symnum); | |
1034 | within_function = 0; | |
1035 | break; | |
1036 | } | |
1037 | ||
1038 | new = pop_context (); | |
1039 | /* Stack must be empty now. */ | |
1040 | if (context_stack_depth > 0 || new == NULL) | |
1041 | { | |
1042 | complain (&ef_complaint, cs->c_symnum); | |
1043 | within_function = 0; | |
1044 | break; | |
1045 | } | |
1046 | if (cs->c_naux != 1) | |
1047 | { | |
1048 | complain (&ef_no_aux_complaint, cs->c_symnum); | |
1049 | fcn_last_line = 0x7FFFFFFF; | |
1050 | } | |
1051 | else | |
1052 | { | |
1053 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1054 | } | |
1055 | enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line, | |
1056 | section_offsets); | |
1057 | ||
1058 | finish_block (new->name, &local_symbols, new->old_blocks, | |
1059 | new->start_addr, | |
1060 | #if defined (FUNCTION_EPILOGUE_SIZE) | |
1061 | /* This macro should be defined only on | |
1062 | machines where the | |
1063 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
1064 | field is always zero. | |
1065 | So use the .bf record information that | |
1066 | points to the epilogue and add the size | |
1067 | of the epilogue. */ | |
1068 | cs->c_value | |
1069 | + FUNCTION_EPILOGUE_SIZE | |
1070 | + ANOFFSET (section_offsets, SECT_OFF_TEXT), | |
1071 | #else | |
1072 | fcn_cs_saved.c_value | |
1073 | + fcn_aux_saved.x_sym.x_misc.x_fsize | |
1074 | + ANOFFSET (section_offsets, SECT_OFF_TEXT), | |
1075 | #endif | |
1076 | objfile | |
1077 | ); | |
1078 | within_function = 0; | |
1079 | } | |
1080 | break; | |
1081 | ||
1082 | case C_BLOCK: | |
1083 | if (STREQ (cs->c_name, ".bb")) | |
1084 | { | |
1085 | tmpaddr = cs->c_value; | |
1086 | tmpaddr += ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
1087 | push_context (++depth, tmpaddr); | |
1088 | } | |
1089 | else if (STREQ (cs->c_name, ".eb")) | |
1090 | { | |
1091 | if (context_stack_depth <= 0) | |
1092 | { /* We attempted to pop an empty context stack */ | |
1093 | complain (&eb_stack_complaint, cs->c_symnum); | |
1094 | break; | |
1095 | } | |
1096 | ||
1097 | new = pop_context (); | |
1098 | if (depth-- != new->depth) | |
1099 | { | |
1100 | complain (&eb_complaint, symnum); | |
1101 | break; | |
1102 | } | |
1103 | if (local_symbols && context_stack_depth > 0) | |
1104 | { | |
1105 | tmpaddr = | |
1106 | cs->c_value + ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
1107 | /* Make a block for the local symbols within. */ | |
1108 | finish_block (0, &local_symbols, new->old_blocks, | |
1109 | new->start_addr, tmpaddr, objfile); | |
1110 | } | |
1111 | /* Now pop locals of block just finished. */ | |
1112 | local_symbols = new->locals; | |
1113 | } | |
1114 | break; | |
1115 | ||
1116 | default: | |
1117 | process_coff_symbol (cs, &main_aux, section_offsets, objfile); | |
1118 | break; | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | if (last_source_file) | |
1123 | coff_end_symtab (objfile); | |
1124 | ||
1125 | /* Patch up any opaque types (references to types that are not defined | |
1126 | in the file where they are referenced, e.g. "struct foo *bar"). */ | |
1127 | ALL_OBJFILE_SYMTABS (objfile, s) | |
1128 | patch_opaque_types (s); | |
1129 | ||
1130 | current_objfile = NULL; | |
1131 | } | |
1132 | \f | |
1133 | /* Routines for reading headers and symbols from executable. */ | |
1134 | ||
1135 | /* Read the next symbol, swap it, and return it in both internal_syment | |
1136 | form, and coff_symbol form. Also return its first auxent, if any, | |
1137 | in internal_auxent form, and skip any other auxents. */ | |
1138 | ||
1139 | static void | |
1140 | read_one_sym (cs, sym, aux) | |
1141 | register struct coff_symbol *cs; | |
1142 | register struct internal_syment *sym; | |
1143 | register union internal_auxent *aux; | |
1144 | { | |
1145 | int i; | |
1146 | ||
1147 | cs->c_symnum = symnum; | |
1148 | bfd_read (temp_sym, local_symesz, 1, nlist_bfd_global); | |
1149 | bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *)sym); | |
1150 | cs->c_naux = sym->n_numaux & 0xff; | |
1151 | if (cs->c_naux >= 1) | |
1152 | { | |
1153 | bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global); | |
1154 | bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass, | |
1155 | 0, cs->c_naux, (char *)aux); | |
1156 | /* If more than one aux entry, read past it (only the first aux | |
1157 | is important). */ | |
1158 | for (i = 1; i < cs->c_naux; i++) | |
1159 | bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global); | |
1160 | } | |
1161 | cs->c_name = getsymname (sym); | |
1162 | cs->c_value = sym->n_value; | |
1163 | cs->c_sclass = (sym->n_sclass & 0xff); | |
1164 | cs->c_secnum = sym->n_scnum; | |
1165 | cs->c_type = (unsigned) sym->n_type; | |
1166 | if (!SDB_TYPE (cs->c_type)) | |
1167 | cs->c_type = 0; | |
1168 | ||
1169 | #if 0 | |
1170 | if (cs->c_sclass & 128) | |
1171 | printf("thumb symbol %s, class 0x%x\n", cs->c_name, cs->c_sclass); | |
1172 | #endif | |
1173 | ||
1174 | symnum += 1 + cs->c_naux; | |
1175 | ||
1176 | /* The PE file format stores symbol values as offsets within the | |
1177 | section, rather than as absolute addresses. We correct that | |
1178 | here, if the symbol has an appropriate storage class. FIXME: We | |
1179 | should use BFD to read the symbols, rather than duplicating the | |
1180 | work here. */ | |
1181 | if (pe_file) | |
1182 | { | |
1183 | switch (cs->c_sclass) | |
1184 | { | |
1185 | case C_EXT: | |
1186 | case C_THUMBEXT: | |
1187 | case C_THUMBEXTFUNC: | |
1188 | case C_SECTION: | |
1189 | case C_NT_WEAK: | |
1190 | case C_STAT: | |
1191 | case C_THUMBSTAT: | |
1192 | case C_THUMBSTATFUNC: | |
1193 | case C_LABEL: | |
1194 | case C_THUMBLABEL: | |
1195 | case C_BLOCK: | |
1196 | case C_FCN: | |
1197 | case C_EFCN: | |
1198 | if (cs->c_secnum != 0) | |
1199 | cs->c_value += cs_section_address (cs, symfile_bfd); | |
1200 | break; | |
1201 | } | |
1202 | } | |
1203 | } | |
1204 | \f | |
1205 | /* Support for string table handling */ | |
1206 | ||
1207 | static char *stringtab = NULL; | |
1208 | ||
1209 | static int | |
1210 | init_stringtab (abfd, offset) | |
1211 | bfd *abfd; | |
1212 | long offset; | |
1213 | { | |
1214 | long length; | |
1215 | int val; | |
1216 | unsigned char lengthbuf[4]; | |
1217 | ||
1218 | free_stringtab (); | |
1219 | ||
1220 | /* If the file is stripped, the offset might be zero, indicating no | |
1221 | string table. Just return with `stringtab' set to null. */ | |
1222 | if (offset == 0) | |
1223 | return 0; | |
1224 | ||
1225 | if (bfd_seek (abfd, offset, 0) < 0) | |
1226 | return -1; | |
1227 | ||
1228 | val = bfd_read ((char *)lengthbuf, sizeof lengthbuf, 1, abfd); | |
1229 | length = bfd_h_get_32 (symfile_bfd, lengthbuf); | |
1230 | ||
1231 | /* If no string table is needed, then the file may end immediately | |
1232 | after the symbols. Just return with `stringtab' set to null. */ | |
1233 | if (val != sizeof lengthbuf || length < sizeof lengthbuf) | |
1234 | return 0; | |
1235 | ||
1236 | stringtab = (char *) xmalloc (length); | |
1237 | /* This is in target format (probably not very useful, and not currently | |
1238 | used), not host format. */ | |
1239 | memcpy (stringtab, lengthbuf, sizeof lengthbuf); | |
1240 | if (length == sizeof length) /* Empty table -- just the count */ | |
1241 | return 0; | |
1242 | ||
1243 | val = bfd_read (stringtab + sizeof lengthbuf, length - sizeof lengthbuf, 1, abfd); | |
1244 | if (val != length - sizeof lengthbuf || stringtab[length - 1] != '\0') | |
1245 | return -1; | |
1246 | ||
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | static void | |
1251 | free_stringtab () | |
1252 | { | |
1253 | if (stringtab) | |
1254 | free (stringtab); | |
1255 | stringtab = NULL; | |
1256 | } | |
1257 | ||
1258 | static char * | |
1259 | getsymname (symbol_entry) | |
1260 | struct internal_syment *symbol_entry; | |
1261 | { | |
1262 | static char buffer[SYMNMLEN+1]; | |
1263 | char *result; | |
1264 | ||
1265 | if (symbol_entry->_n._n_n._n_zeroes == 0) | |
1266 | { | |
1267 | /* FIXME: Probably should be detecting corrupt symbol files by | |
1268 | seeing whether offset points to within the stringtab. */ | |
1269 | result = stringtab + symbol_entry->_n._n_n._n_offset; | |
1270 | } | |
1271 | else | |
1272 | { | |
1273 | strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN); | |
1274 | buffer[SYMNMLEN] = '\0'; | |
1275 | result = buffer; | |
1276 | } | |
1277 | return result; | |
1278 | } | |
1279 | ||
1280 | /* Extract the file name from the aux entry of a C_FILE symbol. Return | |
1281 | only the last component of the name. Result is in static storage and | |
1282 | is only good for temporary use. */ | |
1283 | ||
1284 | static char * | |
1285 | coff_getfilename (aux_entry) | |
1286 | union internal_auxent *aux_entry; | |
1287 | { | |
1288 | static char buffer[BUFSIZ]; | |
1289 | register char *temp; | |
1290 | char *result; | |
1291 | ||
1292 | if (aux_entry->x_file.x_n.x_zeroes == 0) | |
1293 | strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); | |
1294 | else | |
1295 | { | |
1296 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); | |
1297 | buffer[FILNMLEN] = '\0'; | |
1298 | } | |
1299 | result = buffer; | |
1300 | ||
1301 | /* FIXME: We should not be throwing away the information about what | |
1302 | directory. It should go into dirname of the symtab, or some such | |
1303 | place. */ | |
1304 | if ((temp = strrchr (result, '/')) != NULL) | |
1305 | result = temp + 1; | |
1306 | return (result); | |
1307 | } | |
1308 | \f | |
1309 | /* Support for line number handling. */ | |
1310 | ||
1311 | static char *linetab = NULL; | |
1312 | static long linetab_offset; | |
1313 | static unsigned long linetab_size; | |
1314 | ||
1315 | /* Read in all the line numbers for fast lookups later. Leave them in | |
1316 | external (unswapped) format in memory; we'll swap them as we enter | |
1317 | them into GDB's data structures. */ | |
1318 | ||
1319 | static int | |
1320 | init_lineno (abfd, offset, size) | |
1321 | bfd *abfd; | |
1322 | long offset; | |
1323 | int size; | |
1324 | { | |
1325 | int val; | |
1326 | ||
1327 | linetab_offset = offset; | |
1328 | linetab_size = size; | |
1329 | ||
1330 | free_linetab(); | |
1331 | ||
1332 | if (size == 0) | |
1333 | return 0; | |
1334 | ||
1335 | if (bfd_seek (abfd, offset, 0) < 0) | |
1336 | return -1; | |
1337 | ||
1338 | /* Allocate the desired table, plus a sentinel */ | |
1339 | linetab = (char *) xmalloc (size + local_linesz); | |
1340 | ||
1341 | val = bfd_read (linetab, size, 1, abfd); | |
1342 | if (val != size) | |
1343 | return -1; | |
1344 | ||
1345 | /* Terminate it with an all-zero sentinel record */ | |
1346 | memset (linetab + size, 0, local_linesz); | |
1347 | ||
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | static void | |
1352 | free_linetab () | |
1353 | { | |
1354 | if (linetab) | |
1355 | free (linetab); | |
1356 | linetab = NULL; | |
1357 | } | |
1358 | ||
1359 | #if !defined (L_LNNO32) | |
1360 | #define L_LNNO32(lp) ((lp)->l_lnno) | |
1361 | #endif | |
1362 | ||
1363 | static void | |
1364 | enter_linenos (file_offset, first_line, last_line, section_offsets) | |
1365 | long file_offset; | |
1366 | register int first_line; | |
1367 | register int last_line; | |
1368 | struct section_offsets *section_offsets; | |
1369 | { | |
1370 | register char *rawptr; | |
1371 | struct internal_lineno lptr; | |
1372 | ||
1373 | if (!linetab) | |
1374 | return ; | |
1375 | if (file_offset < linetab_offset) | |
1376 | { | |
1377 | complain (&lineno_complaint, file_offset); | |
1378 | if (file_offset > linetab_size) /* Too big to be an offset? */ | |
1379 | return; | |
1380 | file_offset += linetab_offset; /* Try reading at that linetab offset */ | |
1381 | } | |
1382 | ||
1383 | rawptr = &linetab[file_offset - linetab_offset]; | |
1384 | ||
1385 | /* skip first line entry for each function */ | |
1386 | rawptr += local_linesz; | |
1387 | /* line numbers start at one for the first line of the function */ | |
1388 | first_line--; | |
1389 | ||
1390 | for (;;) { | |
1391 | bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr); | |
1392 | rawptr += local_linesz; | |
1393 | /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */ | |
1394 | if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line) | |
7a292a7a | 1395 | record_line (current_subfile, first_line + L_LNNO32 (&lptr), |
c906108c SS |
1396 | lptr.l_addr.l_paddr |
1397 | + ANOFFSET (section_offsets, SECT_OFF_TEXT)); | |
1398 | else | |
1399 | break; | |
1400 | } | |
1401 | } | |
1402 | \f | |
1403 | static void | |
1404 | patch_type (type, real_type) | |
1405 | struct type *type; | |
1406 | struct type *real_type; | |
1407 | { | |
1408 | register struct type *target = TYPE_TARGET_TYPE (type); | |
1409 | register struct type *real_target = TYPE_TARGET_TYPE (real_type); | |
1410 | int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); | |
1411 | ||
1412 | TYPE_LENGTH (target) = TYPE_LENGTH (real_target); | |
1413 | TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); | |
1414 | TYPE_FIELDS (target) = (struct field *) TYPE_ALLOC (target, field_size); | |
1415 | ||
1416 | memcpy (TYPE_FIELDS (target), TYPE_FIELDS (real_target), field_size); | |
1417 | ||
1418 | if (TYPE_NAME (real_target)) | |
1419 | { | |
1420 | if (TYPE_NAME (target)) | |
1421 | free (TYPE_NAME (target)); | |
1422 | TYPE_NAME (target) = concat (TYPE_NAME (real_target), NULL); | |
1423 | } | |
1424 | } | |
1425 | ||
1426 | /* Patch up all appropriate typedef symbols in the opaque_type_chains | |
1427 | so that they can be used to print out opaque data structures properly. */ | |
1428 | ||
1429 | static void | |
1430 | patch_opaque_types (s) | |
1431 | struct symtab *s; | |
1432 | { | |
1433 | register struct block *b; | |
1434 | register int i; | |
1435 | register struct symbol *real_sym; | |
1436 | ||
1437 | /* Go through the per-file symbols only */ | |
1438 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); | |
1439 | for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--) | |
1440 | { | |
1441 | /* Find completed typedefs to use to fix opaque ones. | |
1442 | Remove syms from the chain when their types are stored, | |
1443 | but search the whole chain, as there may be several syms | |
1444 | from different files with the same name. */ | |
1445 | real_sym = BLOCK_SYM (b, i); | |
1446 | if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF && | |
1447 | SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE && | |
1448 | TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR && | |
1449 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) | |
1450 | { | |
1451 | register char *name = SYMBOL_NAME (real_sym); | |
1452 | register int hash = hashname (name); | |
1453 | register struct symbol *sym, *prev; | |
1454 | ||
1455 | prev = 0; | |
1456 | for (sym = opaque_type_chain[hash]; sym;) | |
1457 | { | |
1458 | if (name[0] == SYMBOL_NAME (sym)[0] && | |
1459 | STREQ (name + 1, SYMBOL_NAME (sym) + 1)) | |
1460 | { | |
1461 | if (prev) | |
1462 | { | |
1463 | SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); | |
1464 | } | |
1465 | else | |
1466 | { | |
1467 | opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); | |
1468 | } | |
1469 | ||
1470 | patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); | |
1471 | ||
1472 | if (prev) | |
1473 | { | |
1474 | sym = SYMBOL_VALUE_CHAIN (prev); | |
1475 | } | |
1476 | else | |
1477 | { | |
1478 | sym = opaque_type_chain[hash]; | |
1479 | } | |
1480 | } | |
1481 | else | |
1482 | { | |
1483 | prev = sym; | |
1484 | sym = SYMBOL_VALUE_CHAIN (sym); | |
1485 | } | |
1486 | } | |
1487 | } | |
1488 | } | |
1489 | } | |
1490 | \f | |
1491 | static struct symbol * | |
1492 | process_coff_symbol (cs, aux, section_offsets, objfile) | |
1493 | register struct coff_symbol *cs; | |
1494 | register union internal_auxent *aux; | |
1495 | struct section_offsets *section_offsets; | |
1496 | struct objfile *objfile; | |
1497 | { | |
1498 | register struct symbol *sym | |
1499 | = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, | |
1500 | sizeof (struct symbol)); | |
1501 | char *name; | |
1502 | ||
1503 | memset (sym, 0, sizeof (struct symbol)); | |
1504 | name = cs->c_name; | |
1505 | name = EXTERNAL_NAME (name, objfile->obfd); | |
1506 | SYMBOL_NAME (sym) = obsavestring (name, strlen (name), | |
1507 | &objfile->symbol_obstack); | |
1508 | SYMBOL_LANGUAGE (sym) = language_auto; | |
1509 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); | |
1510 | ||
1511 | /* default assumptions */ | |
1512 | SYMBOL_VALUE (sym) = cs->c_value; | |
1513 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1514 | SYMBOL_SECTION (sym) = cs_to_section (cs, objfile); | |
1515 | ||
1516 | if (ISFCN (cs->c_type)) | |
1517 | { | |
1518 | SYMBOL_VALUE (sym) += ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
1519 | SYMBOL_TYPE(sym) = | |
1520 | lookup_function_type (decode_function_type (cs, cs->c_type, aux)); | |
1521 | ||
1522 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
1523 | if (cs->c_sclass == C_STAT || cs->c_sclass == C_THUMBSTAT | |
1524 | || cs->c_sclass == C_THUMBSTATFUNC) | |
1525 | add_symbol_to_list (sym, &file_symbols); | |
1526 | else if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT | |
1527 | || cs->c_sclass == C_THUMBEXTFUNC) | |
1528 | add_symbol_to_list (sym, &global_symbols); | |
1529 | } | |
1530 | else | |
1531 | { | |
1532 | SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux); | |
1533 | switch (cs->c_sclass) | |
1534 | { | |
1535 | case C_NULL: | |
1536 | break; | |
1537 | ||
1538 | case C_AUTO: | |
1539 | SYMBOL_CLASS (sym) = LOC_LOCAL; | |
1540 | add_symbol_to_list (sym, &local_symbols); | |
1541 | break; | |
1542 | ||
1543 | case C_THUMBEXT: | |
1544 | case C_THUMBEXTFUNC: | |
1545 | case C_EXT: | |
1546 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1547 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
1548 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
1549 | add_symbol_to_list (sym, &global_symbols); | |
1550 | break; | |
1551 | ||
1552 | case C_THUMBSTAT: | |
1553 | case C_THUMBSTATFUNC: | |
1554 | case C_STAT: | |
1555 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1556 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
1557 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (section_offsets, SECT_OFF_TEXT); | |
1558 | if (within_function) { | |
1559 | /* Static symbol of local scope */ | |
1560 | add_symbol_to_list (sym, &local_symbols); | |
1561 | } | |
1562 | else { | |
1563 | /* Static symbol at top level of file */ | |
1564 | add_symbol_to_list (sym, &file_symbols); | |
1565 | } | |
1566 | break; | |
1567 | ||
1568 | #ifdef C_GLBLREG /* AMD coff */ | |
1569 | case C_GLBLREG: | |
1570 | #endif | |
1571 | case C_REG: | |
1572 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
1573 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value); | |
1574 | add_symbol_to_list (sym, &local_symbols); | |
1575 | break; | |
1576 | ||
1577 | case C_THUMBLABEL: | |
1578 | case C_LABEL: | |
1579 | break; | |
1580 | ||
1581 | case C_ARG: | |
1582 | SYMBOL_CLASS (sym) = LOC_ARG; | |
1583 | add_symbol_to_list (sym, &local_symbols); | |
1584 | #if !defined (BELIEVE_PCC_PROMOTION) | |
1585 | if (TARGET_BYTE_ORDER == BIG_ENDIAN) | |
1586 | { | |
1587 | /* If PCC says a parameter is a short or a char, | |
1588 | aligned on an int boundary, realign it to the | |
1589 | "little end" of the int. */ | |
1590 | struct type *temptype; | |
1591 | temptype = lookup_fundamental_type (current_objfile, | |
1592 | FT_INTEGER); | |
1593 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) | |
1594 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT | |
1595 | && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (temptype)) | |
1596 | { | |
1597 | SYMBOL_VALUE (sym) += | |
1598 | TYPE_LENGTH (temptype) | |
1599 | - TYPE_LENGTH (SYMBOL_TYPE (sym)); | |
1600 | } | |
1601 | } | |
1602 | #endif | |
1603 | break; | |
1604 | ||
1605 | case C_REGPARM: | |
1606 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
1607 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value); | |
1608 | add_symbol_to_list (sym, &local_symbols); | |
1609 | #if !defined (BELIEVE_PCC_PROMOTION) | |
1610 | /* FIXME: This should retain the current type, since it's just | |
1611 | a register value. gnu@adobe, 26Feb93 */ | |
1612 | { | |
1613 | /* If PCC says a parameter is a short or a char, | |
1614 | it is really an int. */ | |
1615 | struct type *temptype; | |
1616 | temptype = | |
1617 | lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1618 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) | |
1619 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT) | |
1620 | { | |
1621 | SYMBOL_TYPE (sym) = | |
1622 | (TYPE_UNSIGNED (SYMBOL_TYPE (sym)) | |
1623 | ? lookup_fundamental_type (current_objfile, | |
1624 | FT_UNSIGNED_INTEGER) | |
1625 | : temptype); | |
1626 | } | |
1627 | } | |
1628 | #endif | |
1629 | break; | |
1630 | ||
1631 | case C_TPDEF: | |
1632 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1633 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1634 | ||
1635 | /* If type has no name, give it one */ | |
1636 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
1637 | { | |
1638 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR | |
1639 | || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC) | |
1640 | { | |
1641 | /* If we are giving a name to a type such as "pointer to | |
1642 | foo" or "function returning foo", we better not set | |
1643 | the TYPE_NAME. If the program contains "typedef char | |
1644 | *caddr_t;", we don't want all variables of type char | |
1645 | * to print as caddr_t. This is not just a | |
1646 | consequence of GDB's type management; CC and GCC (at | |
1647 | least through version 2.4) both output variables of | |
1648 | either type char * or caddr_t with the type | |
1649 | refering to the C_TPDEF symbol for caddr_t. If a future | |
1650 | compiler cleans this up it GDB is not ready for it | |
1651 | yet, but if it becomes ready we somehow need to | |
1652 | disable this check (without breaking the PCC/GCC2.4 | |
1653 | case). | |
1654 | ||
1655 | Sigh. | |
1656 | ||
1657 | Fortunately, this check seems not to be necessary | |
1658 | for anything except pointers or functions. */ | |
1659 | ; | |
1660 | } | |
1661 | else | |
1662 | TYPE_NAME (SYMBOL_TYPE (sym)) = | |
1663 | concat (SYMBOL_NAME (sym), NULL); | |
1664 | } | |
1665 | #ifdef CXUX_TARGET | |
1666 | /* Ignore vendor section for Harris CX/UX targets. */ | |
1667 | else if (cs->c_name[0] == '$') | |
1668 | break; | |
1669 | #endif /* CXUX_TARGET */ | |
1670 | ||
1671 | /* Keep track of any type which points to empty structured type, | |
1672 | so it can be filled from a definition from another file. A | |
1673 | simple forward reference (TYPE_CODE_UNDEF) is not an | |
1674 | empty structured type, though; the forward references | |
1675 | work themselves out via the magic of coff_lookup_type. */ | |
1676 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && | |
1677 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0 && | |
1678 | TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) != | |
1679 | TYPE_CODE_UNDEF) | |
1680 | { | |
1681 | register int i = hashname (SYMBOL_NAME (sym)); | |
1682 | ||
1683 | SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; | |
1684 | opaque_type_chain[i] = sym; | |
1685 | } | |
1686 | add_symbol_to_list (sym, &file_symbols); | |
1687 | break; | |
1688 | ||
1689 | case C_STRTAG: | |
1690 | case C_UNTAG: | |
1691 | case C_ENTAG: | |
1692 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1693 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
1694 | ||
1695 | /* Some compilers try to be helpful by inventing "fake" | |
1696 | names for anonymous enums, structures, and unions, like | |
1697 | "~0fake" or ".0fake". Thanks, but no thanks... */ | |
1698 | if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0) | |
1699 | if (SYMBOL_NAME(sym) != NULL | |
1700 | && *SYMBOL_NAME(sym) != '~' | |
1701 | && *SYMBOL_NAME(sym) != '.') | |
1702 | TYPE_TAG_NAME (SYMBOL_TYPE (sym)) = | |
1703 | concat (SYMBOL_NAME (sym), NULL); | |
1704 | ||
1705 | add_symbol_to_list (sym, &file_symbols); | |
1706 | break; | |
1707 | ||
1708 | default: | |
1709 | break; | |
1710 | } | |
1711 | } | |
1712 | return sym; | |
1713 | } | |
1714 | \f | |
1715 | /* Decode a coff type specifier; return the type that is meant. */ | |
1716 | ||
1717 | static struct type * | |
1718 | decode_type (cs, c_type, aux) | |
1719 | register struct coff_symbol *cs; | |
1720 | unsigned int c_type; | |
1721 | register union internal_auxent *aux; | |
1722 | { | |
1723 | register struct type *type = 0; | |
1724 | unsigned int new_c_type; | |
1725 | ||
1726 | if (c_type & ~N_BTMASK) | |
1727 | { | |
1728 | new_c_type = DECREF (c_type); | |
1729 | if (ISPTR (c_type)) | |
1730 | { | |
1731 | type = decode_type (cs, new_c_type, aux); | |
1732 | type = lookup_pointer_type (type); | |
1733 | } | |
1734 | else if (ISFCN (c_type)) | |
1735 | { | |
1736 | type = decode_type (cs, new_c_type, aux); | |
1737 | type = lookup_function_type (type); | |
1738 | } | |
1739 | else if (ISARY (c_type)) | |
1740 | { | |
1741 | int i, n; | |
1742 | register unsigned short *dim; | |
1743 | struct type *base_type, *index_type, *range_type; | |
1744 | ||
1745 | /* Define an array type. */ | |
1746 | /* auxent refers to array, not base type */ | |
1747 | if (aux->x_sym.x_tagndx.l == 0) | |
1748 | cs->c_naux = 0; | |
1749 | ||
1750 | /* shift the indices down */ | |
1751 | dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; | |
1752 | i = 1; | |
1753 | n = dim[0]; | |
1754 | for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) | |
1755 | *dim = *(dim + 1); | |
1756 | *dim = 0; | |
1757 | ||
1758 | base_type = decode_type (cs, new_c_type, aux); | |
1759 | index_type = lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1760 | range_type = | |
1761 | create_range_type ((struct type *) NULL, index_type, 0, n - 1); | |
1762 | type = | |
1763 | create_array_type ((struct type *) NULL, base_type, range_type); | |
1764 | } | |
1765 | return type; | |
1766 | } | |
1767 | ||
1768 | /* Reference to existing type. This only occurs with the | |
1769 | struct, union, and enum types. EPI a29k coff | |
1770 | fakes us out by producing aux entries with a nonzero | |
1771 | x_tagndx for definitions of structs, unions, and enums, so we | |
1772 | have to check the c_sclass field. SCO 3.2v4 cc gets confused | |
1773 | with pointers to pointers to defined structs, and generates | |
1774 | negative x_tagndx fields. */ | |
1775 | if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0) | |
1776 | { | |
1777 | if (cs->c_sclass != C_STRTAG | |
1778 | && cs->c_sclass != C_UNTAG | |
1779 | && cs->c_sclass != C_ENTAG | |
1780 | && aux->x_sym.x_tagndx.l >= 0) | |
1781 | { | |
1782 | type = coff_alloc_type (aux->x_sym.x_tagndx.l); | |
1783 | return type; | |
1784 | } | |
1785 | else | |
1786 | { | |
1787 | complain (&tagndx_bad_complaint, cs->c_name); | |
1788 | /* And fall through to decode_base_type... */ | |
1789 | } | |
1790 | } | |
1791 | ||
1792 | return decode_base_type (cs, BTYPE (c_type), aux); | |
1793 | } | |
1794 | ||
1795 | /* Decode a coff type specifier for function definition; | |
1796 | return the type that the function returns. */ | |
1797 | ||
1798 | static struct type * | |
1799 | decode_function_type (cs, c_type, aux) | |
1800 | register struct coff_symbol *cs; | |
1801 | unsigned int c_type; | |
1802 | register union internal_auxent *aux; | |
1803 | { | |
1804 | if (aux->x_sym.x_tagndx.l == 0) | |
1805 | cs->c_naux = 0; /* auxent refers to function, not base type */ | |
1806 | ||
1807 | return decode_type (cs, DECREF (c_type), aux); | |
1808 | } | |
1809 | \f | |
1810 | /* basic C types */ | |
1811 | ||
1812 | static struct type * | |
1813 | decode_base_type (cs, c_type, aux) | |
1814 | register struct coff_symbol *cs; | |
1815 | unsigned int c_type; | |
1816 | register union internal_auxent *aux; | |
1817 | { | |
1818 | struct type *type; | |
1819 | ||
1820 | switch (c_type) | |
1821 | { | |
1822 | case T_NULL: | |
1823 | /* shows up with "void (*foo)();" structure members */ | |
1824 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
1825 | ||
1826 | #if 0 | |
1827 | /* DGUX actually defines both T_ARG and T_VOID to the same value. */ | |
1828 | #ifdef T_ARG | |
1829 | case T_ARG: | |
1830 | /* Shows up in DGUX, I think. Not sure where. */ | |
1831 | return lookup_fundamental_type (current_objfile, FT_VOID); /* shouldn't show up here */ | |
1832 | #endif | |
1833 | #endif /* 0 */ | |
1834 | ||
1835 | #ifdef T_VOID | |
1836 | case T_VOID: | |
1837 | /* Intel 960 COFF has this symbol and meaning. */ | |
1838 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
1839 | #endif | |
1840 | ||
1841 | case T_CHAR: | |
1842 | return lookup_fundamental_type (current_objfile, FT_CHAR); | |
1843 | ||
1844 | case T_SHORT: | |
1845 | return lookup_fundamental_type (current_objfile, FT_SHORT); | |
1846 | ||
1847 | case T_INT: | |
1848 | return lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1849 | ||
1850 | case T_LONG: | |
1851 | if (cs->c_sclass == C_FIELD | |
1852 | && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) | |
1853 | return lookup_fundamental_type (current_objfile, FT_LONG_LONG); | |
1854 | else | |
1855 | return lookup_fundamental_type (current_objfile, FT_LONG); | |
1856 | ||
1857 | case T_FLOAT: | |
1858 | return lookup_fundamental_type (current_objfile, FT_FLOAT); | |
1859 | ||
1860 | case T_DOUBLE: | |
1861 | return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); | |
1862 | ||
1863 | case T_LNGDBL: | |
1864 | return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); | |
1865 | ||
1866 | case T_STRUCT: | |
1867 | if (cs->c_naux != 1) | |
1868 | { | |
1869 | /* anonymous structure type */ | |
1870 | type = coff_alloc_type (cs->c_symnum); | |
1871 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1872 | TYPE_NAME (type) = NULL; | |
1873 | /* This used to set the tag to "<opaque>". But I think setting it | |
1874 | to NULL is right, and the printing code can print it as | |
1875 | "struct {...}". */ | |
1876 | TYPE_TAG_NAME (type) = NULL; | |
1877 | INIT_CPLUS_SPECIFIC(type); | |
1878 | TYPE_LENGTH (type) = 0; | |
1879 | TYPE_FIELDS (type) = 0; | |
1880 | TYPE_NFIELDS (type) = 0; | |
1881 | } | |
1882 | else | |
1883 | { | |
1884 | type = coff_read_struct_type (cs->c_symnum, | |
1885 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1886 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
1887 | } | |
1888 | return type; | |
1889 | ||
1890 | case T_UNION: | |
1891 | if (cs->c_naux != 1) | |
1892 | { | |
1893 | /* anonymous union type */ | |
1894 | type = coff_alloc_type (cs->c_symnum); | |
1895 | TYPE_NAME (type) = NULL; | |
1896 | /* This used to set the tag to "<opaque>". But I think setting it | |
1897 | to NULL is right, and the printing code can print it as | |
1898 | "union {...}". */ | |
1899 | TYPE_TAG_NAME (type) = NULL; | |
1900 | INIT_CPLUS_SPECIFIC(type); | |
1901 | TYPE_LENGTH (type) = 0; | |
1902 | TYPE_FIELDS (type) = 0; | |
1903 | TYPE_NFIELDS (type) = 0; | |
1904 | } | |
1905 | else | |
1906 | { | |
1907 | type = coff_read_struct_type (cs->c_symnum, | |
1908 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1909 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
1910 | } | |
1911 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1912 | return type; | |
1913 | ||
1914 | case T_ENUM: | |
1915 | if (cs->c_naux != 1) | |
1916 | { | |
1917 | /* anonymous enum type */ | |
1918 | type = coff_alloc_type (cs->c_symnum); | |
1919 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
1920 | TYPE_NAME (type) = NULL; | |
1921 | /* This used to set the tag to "<opaque>". But I think setting it | |
1922 | to NULL is right, and the printing code can print it as | |
1923 | "enum {...}". */ | |
1924 | TYPE_TAG_NAME (type) = NULL; | |
1925 | TYPE_LENGTH (type) = 0; | |
1926 | TYPE_FIELDS (type) = 0; | |
1927 | TYPE_NFIELDS(type) = 0; | |
1928 | } | |
1929 | else | |
1930 | { | |
1931 | type = coff_read_enum_type (cs->c_symnum, | |
1932 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1933 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
1934 | } | |
1935 | return type; | |
1936 | ||
1937 | case T_MOE: | |
1938 | /* shouldn't show up here */ | |
1939 | break; | |
1940 | ||
1941 | case T_UCHAR: | |
1942 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); | |
1943 | ||
1944 | case T_USHORT: | |
1945 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); | |
1946 | ||
1947 | case T_UINT: | |
1948 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); | |
1949 | ||
1950 | case T_ULONG: | |
1951 | if (cs->c_sclass == C_FIELD | |
1952 | && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) | |
1953 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); | |
1954 | else | |
1955 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG); | |
1956 | } | |
1957 | complain (&unexpected_type_complaint, cs->c_name); | |
1958 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
1959 | } | |
1960 | \f | |
1961 | /* This page contains subroutines of read_type. */ | |
1962 | ||
1963 | /* Read the description of a structure (or union type) and return an | |
1964 | object describing the type. */ | |
1965 | ||
1966 | static struct type * | |
1967 | coff_read_struct_type (index, length, lastsym) | |
1968 | int index; | |
1969 | int length; | |
1970 | int lastsym; | |
1971 | { | |
1972 | struct nextfield | |
1973 | { | |
1974 | struct nextfield *next; | |
1975 | struct field field; | |
1976 | }; | |
1977 | ||
1978 | register struct type *type; | |
1979 | register struct nextfield *list = 0; | |
1980 | struct nextfield *new; | |
1981 | int nfields = 0; | |
1982 | register int n; | |
1983 | char *name; | |
1984 | struct coff_symbol member_sym; | |
1985 | register struct coff_symbol *ms = &member_sym; | |
1986 | struct internal_syment sub_sym; | |
1987 | union internal_auxent sub_aux; | |
1988 | int done = 0; | |
1989 | ||
1990 | type = coff_alloc_type (index); | |
1991 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1992 | INIT_CPLUS_SPECIFIC(type); | |
1993 | TYPE_LENGTH (type) = length; | |
1994 | ||
1995 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
1996 | { | |
1997 | read_one_sym (ms, &sub_sym, &sub_aux); | |
1998 | name = ms->c_name; | |
1999 | name = EXTERNAL_NAME (name, current_objfile->obfd); | |
2000 | ||
2001 | switch (ms->c_sclass) | |
2002 | { | |
2003 | case C_MOS: | |
2004 | case C_MOU: | |
2005 | ||
2006 | /* Get space to record the next field's data. */ | |
2007 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
2008 | new->next = list; | |
2009 | list = new; | |
2010 | ||
2011 | /* Save the data. */ | |
2012 | list->field.name = | |
2013 | obsavestring (name, | |
2014 | strlen (name), | |
2015 | ¤t_objfile->symbol_obstack); | |
2016 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); | |
2017 | FIELD_BITPOS (list->field) = 8 * ms->c_value; | |
2018 | FIELD_BITSIZE (list->field) = 0; | |
2019 | nfields++; | |
2020 | break; | |
2021 | ||
2022 | case C_FIELD: | |
2023 | ||
2024 | /* Get space to record the next field's data. */ | |
2025 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
2026 | new->next = list; | |
2027 | list = new; | |
2028 | ||
2029 | /* Save the data. */ | |
2030 | list->field.name = | |
2031 | obsavestring (name, | |
2032 | strlen (name), | |
2033 | ¤t_objfile->symbol_obstack); | |
2034 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); | |
2035 | FIELD_BITPOS (list->field) = ms->c_value; | |
2036 | FIELD_BITSIZE (list->field) = sub_aux.x_sym.x_misc.x_lnsz.x_size; | |
2037 | nfields++; | |
2038 | break; | |
2039 | ||
2040 | case C_EOS: | |
2041 | done = 1; | |
2042 | break; | |
2043 | } | |
2044 | } | |
2045 | /* Now create the vector of fields, and record how big it is. */ | |
2046 | ||
2047 | TYPE_NFIELDS (type) = nfields; | |
2048 | TYPE_FIELDS (type) = (struct field *) | |
2049 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
2050 | ||
2051 | /* Copy the saved-up fields into the field vector. */ | |
2052 | ||
2053 | for (n = nfields; list; list = list->next) | |
2054 | TYPE_FIELD (type, --n) = list->field; | |
2055 | ||
2056 | return type; | |
2057 | } | |
2058 | \f | |
2059 | /* Read a definition of an enumeration type, | |
2060 | and create and return a suitable type object. | |
2061 | Also defines the symbols that represent the values of the type. */ | |
2062 | ||
2063 | /* ARGSUSED */ | |
2064 | static struct type * | |
2065 | coff_read_enum_type (index, length, lastsym) | |
2066 | int index; | |
2067 | int length; | |
2068 | int lastsym; | |
2069 | { | |
2070 | register struct symbol *sym; | |
2071 | register struct type *type; | |
2072 | int nsyms = 0; | |
2073 | int done = 0; | |
2074 | struct pending **symlist; | |
2075 | struct coff_symbol member_sym; | |
2076 | register struct coff_symbol *ms = &member_sym; | |
2077 | struct internal_syment sub_sym; | |
2078 | union internal_auxent sub_aux; | |
2079 | struct pending *osyms, *syms; | |
2080 | int o_nsyms; | |
2081 | register int n; | |
2082 | char *name; | |
2083 | int unsigned_enum = 1; | |
2084 | ||
2085 | type = coff_alloc_type (index); | |
2086 | if (within_function) | |
2087 | symlist = &local_symbols; | |
2088 | else | |
2089 | symlist = &file_symbols; | |
2090 | osyms = *symlist; | |
2091 | o_nsyms = osyms ? osyms->nsyms : 0; | |
2092 | ||
2093 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
2094 | { | |
2095 | read_one_sym (ms, &sub_sym, &sub_aux); | |
2096 | name = ms->c_name; | |
2097 | name = EXTERNAL_NAME (name, current_objfile->obfd); | |
2098 | ||
2099 | switch (ms->c_sclass) | |
2100 | { | |
2101 | case C_MOE: | |
2102 | sym = (struct symbol *) obstack_alloc | |
2103 | (¤t_objfile->symbol_obstack, | |
2104 | sizeof (struct symbol)); | |
2105 | memset (sym, 0, sizeof (struct symbol)); | |
2106 | ||
2107 | SYMBOL_NAME (sym) = | |
2108 | obsavestring (name, strlen (name), | |
2109 | ¤t_objfile->symbol_obstack); | |
2110 | SYMBOL_CLASS (sym) = LOC_CONST; | |
2111 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2112 | SYMBOL_VALUE (sym) = ms->c_value; | |
2113 | add_symbol_to_list (sym, symlist); | |
2114 | nsyms++; | |
2115 | break; | |
2116 | ||
2117 | case C_EOS: | |
2118 | /* Sometimes the linker (on 386/ix 2.0.2 at least) screws | |
2119 | up the count of how many symbols to read. So stop | |
2120 | on .eos. */ | |
2121 | done = 1; | |
2122 | break; | |
2123 | } | |
2124 | } | |
2125 | ||
2126 | /* Now fill in the fields of the type-structure. */ | |
2127 | ||
2128 | if (length > 0) | |
2129 | TYPE_LENGTH (type) = length; | |
2130 | else | |
2131 | TYPE_LENGTH (type) = TARGET_INT_BIT / TARGET_CHAR_BIT; /* Assume ints */ | |
2132 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
2133 | TYPE_NFIELDS (type) = nsyms; | |
2134 | TYPE_FIELDS (type) = (struct field *) | |
2135 | TYPE_ALLOC (type, sizeof (struct field) * nsyms); | |
2136 | ||
2137 | /* Find the symbols for the values and put them into the type. | |
2138 | The symbols can be found in the symlist that we put them on | |
2139 | to cause them to be defined. osyms contains the old value | |
2140 | of that symlist; everything up to there was defined by us. */ | |
2141 | /* Note that we preserve the order of the enum constants, so | |
2142 | that in something like "enum {FOO, LAST_THING=FOO}" we print | |
2143 | FOO, not LAST_THING. */ | |
2144 | ||
2145 | for (syms = *symlist, n = 0; syms; syms = syms->next) | |
2146 | { | |
2147 | int j = 0; | |
2148 | ||
2149 | if (syms == osyms) | |
2150 | j = o_nsyms; | |
2151 | for (; j < syms->nsyms; j++,n++) | |
2152 | { | |
2153 | struct symbol *xsym = syms->symbol[j]; | |
2154 | SYMBOL_TYPE (xsym) = type; | |
2155 | TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym); | |
2156 | TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym); | |
2157 | if (SYMBOL_VALUE (xsym) < 0) | |
2158 | unsigned_enum = 0; | |
2159 | TYPE_FIELD_BITSIZE (type, n) = 0; | |
2160 | } | |
2161 | if (syms == osyms) | |
2162 | break; | |
2163 | } | |
2164 | ||
2165 | if (unsigned_enum) | |
2166 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; | |
2167 | ||
2168 | return type; | |
2169 | } | |
2170 | ||
2171 | /* Register our ability to parse symbols for coff BFD files. */ | |
2172 | ||
2173 | static struct sym_fns coff_sym_fns = | |
2174 | { | |
2175 | bfd_target_coff_flavour, | |
2176 | coff_new_init, /* sym_new_init: init anything gbl to entire symtab */ | |
2177 | coff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
2178 | coff_symfile_read, /* sym_read: read a symbol file into symtab */ | |
2179 | coff_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
2180 | default_symfile_offsets, | |
2181 | /* sym_offsets: xlate external to internal form */ | |
2182 | NULL /* next: pointer to next struct sym_fns */ | |
2183 | }; | |
2184 | ||
2185 | void | |
2186 | _initialize_coffread () | |
2187 | { | |
2188 | add_symtab_fns (&coff_sym_fns); | |
2189 | } |