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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 | |
c5aa993b | 3 | Free Software Foundation, Inc. |
c906108c SS |
4 | Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu). |
5 | ||
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
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. | |
c906108c | 12 | |
c5aa993b JM |
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. | |
c906108c | 17 | |
c5aa993b JM |
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, | |
21 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "symtab.h" | |
25 | #include "gdbtypes.h" | |
26 | #include "demangle.h" | |
27 | #include "breakpoint.h" | |
28 | ||
29 | #include "bfd.h" | |
30 | #include "obstack.h" | |
31 | ||
32 | #include "gdb_string.h" | |
33 | #include <ctype.h> | |
34 | ||
35 | #include "coff/internal.h" /* Internal format of COFF symbols in BFD */ | |
36 | #include "libcoff.h" /* FIXME secret internal data from BFD */ | |
37 | ||
38 | #include "symfile.h" | |
39 | #include "objfiles.h" | |
40 | #include "buildsym.h" | |
41 | #include "gdb-stabs.h" | |
42 | #include "stabsread.h" | |
43 | #include "complaints.h" | |
44 | #include "target.h" | |
45 | ||
392a587b JM |
46 | extern void _initialize_coffread PARAMS ((void)); |
47 | ||
c5aa993b JM |
48 | struct coff_symfile_info |
49 | { | |
50 | file_ptr min_lineno_offset; /* Where in file lowest line#s are */ | |
51 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ | |
c906108c | 52 | |
c5aa993b JM |
53 | CORE_ADDR textaddr; /* Addr of .text section. */ |
54 | unsigned int textsize; /* Size of .text section. */ | |
55 | struct stab_section_list *stabsects; /* .stab sections. */ | |
56 | asection *stabstrsect; /* Section pointer for .stab section */ | |
57 | char *stabstrdata; | |
58 | }; | |
c906108c SS |
59 | |
60 | /* Translate an external name string into a user-visible name. */ | |
61 | #define EXTERNAL_NAME(string, abfd) \ | |
62 | (string[0] == bfd_get_symbol_leading_char(abfd)? string+1: string) | |
63 | ||
64 | /* To be an sdb debug type, type must have at least a basic or primary | |
65 | derived type. Using this rather than checking against T_NULL is | |
66 | said to prevent core dumps if we try to operate on Michael Bloom | |
67 | dbx-in-coff file. */ | |
68 | ||
69 | #define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK)) | |
70 | ||
71 | /* Convert from an sdb register number to an internal gdb register number. | |
72 | This should be defined in tm.h, if REGISTER_NAMES is not set up | |
73 | to map one to one onto the sdb register numbers. */ | |
74 | ||
75 | #ifndef SDB_REG_TO_REGNUM | |
c5aa993b | 76 | #define SDB_REG_TO_REGNUM(value) (value) |
c906108c SS |
77 | #endif |
78 | ||
79 | /* Core address of start and end of text of current source file. | |
80 | This comes from a ".text" symbol where x_nlinno > 0. */ | |
81 | ||
82 | static CORE_ADDR current_source_start_addr; | |
83 | static CORE_ADDR current_source_end_addr; | |
84 | ||
85 | /* The addresses of the symbol table stream and number of symbols | |
86 | of the object file we are reading (as copied into core). */ | |
87 | ||
88 | static bfd *nlist_bfd_global; | |
89 | static int nlist_nsyms_global; | |
90 | ||
c906108c SS |
91 | |
92 | /* Pointers to scratch storage, used for reading raw symbols and auxents. */ | |
93 | ||
94 | static char *temp_sym; | |
95 | static char *temp_aux; | |
96 | ||
97 | /* Local variables that hold the shift and mask values for the | |
98 | COFF file that we are currently reading. These come back to us | |
99 | from BFD, and are referenced by their macro names, as well as | |
100 | internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF | |
101 | macros from include/coff/internal.h . */ | |
102 | ||
c5aa993b JM |
103 | static unsigned local_n_btmask; |
104 | static unsigned local_n_btshft; | |
105 | static unsigned local_n_tmask; | |
106 | static unsigned local_n_tshift; | |
c906108c SS |
107 | |
108 | #define N_BTMASK local_n_btmask | |
109 | #define N_BTSHFT local_n_btshft | |
110 | #define N_TMASK local_n_tmask | |
111 | #define N_TSHIFT local_n_tshift | |
c5aa993b | 112 | |
c906108c SS |
113 | /* Local variables that hold the sizes in the file of various COFF structures. |
114 | (We only need to know this to read them from the file -- BFD will then | |
115 | translate the data in them, into `internal_xxx' structs in the right | |
116 | byte order, alignment, etc.) */ | |
117 | ||
c5aa993b JM |
118 | static unsigned local_linesz; |
119 | static unsigned local_symesz; | |
120 | static unsigned local_auxesz; | |
c906108c SS |
121 | |
122 | /* This is set if this is a PE format file. */ | |
123 | ||
124 | static int pe_file; | |
125 | ||
126 | /* Chain of typedefs of pointers to empty struct/union types. | |
127 | They are chained thru the SYMBOL_VALUE_CHAIN. */ | |
128 | ||
129 | static struct symbol *opaque_type_chain[HASHSIZE]; | |
130 | ||
131 | /* Complaints about various problems in the file being read */ | |
132 | ||
c5aa993b JM |
133 | struct complaint ef_complaint = |
134 | {"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0}; | |
c906108c | 135 | |
c5aa993b JM |
136 | struct complaint ef_stack_complaint = |
137 | {"`.ef' symbol without matching `.bf' symbol ignored starting at symnum %d", 0, 0}; | |
c906108c | 138 | |
c5aa993b JM |
139 | struct complaint eb_stack_complaint = |
140 | {"`.eb' symbol without matching `.bb' symbol ignored starting at symnum %d", 0, 0}; | |
c906108c SS |
141 | |
142 | struct complaint bf_no_aux_complaint = | |
c5aa993b | 143 | {"`.bf' symbol %d has no aux entry", 0, 0}; |
c906108c SS |
144 | |
145 | struct complaint ef_no_aux_complaint = | |
c5aa993b | 146 | {"`.ef' symbol %d has no aux entry", 0, 0}; |
c906108c SS |
147 | |
148 | struct complaint lineno_complaint = | |
c5aa993b | 149 | {"Line number pointer %d lower than start of line numbers", 0, 0}; |
c906108c SS |
150 | |
151 | struct complaint unexpected_type_complaint = | |
c5aa993b | 152 | {"Unexpected type for symbol %s", 0, 0}; |
c906108c SS |
153 | |
154 | struct complaint bad_sclass_complaint = | |
c5aa993b | 155 | {"Bad n_sclass for symbol %s", 0, 0}; |
c906108c SS |
156 | |
157 | struct complaint misordered_blocks_complaint = | |
c5aa993b | 158 | {"Blocks out of order at address %x", 0, 0}; |
c906108c SS |
159 | |
160 | struct complaint tagndx_bad_complaint = | |
c5aa993b | 161 | {"Symbol table entry for %s has bad tagndx value", 0, 0}; |
c906108c | 162 | |
c5aa993b JM |
163 | struct complaint eb_complaint = |
164 | {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0}; | |
c906108c SS |
165 | |
166 | /* Simplified internal version of coff symbol table information */ | |
167 | ||
c5aa993b JM |
168 | struct coff_symbol |
169 | { | |
170 | char *c_name; | |
171 | int c_symnum; /* symbol number of this entry */ | |
172 | int c_naux; /* 0 if syment only, 1 if syment + auxent, etc */ | |
173 | long c_value; | |
174 | int c_sclass; | |
175 | int c_secnum; | |
176 | unsigned int c_type; | |
177 | }; | |
c906108c | 178 | |
7be570e7 JM |
179 | extern void stabsread_clear_cache PARAMS ((void)); |
180 | ||
c906108c SS |
181 | static struct type *coff_read_struct_type PARAMS ((int, int, int)); |
182 | ||
183 | static struct type *decode_base_type PARAMS ((struct coff_symbol *, | |
184 | unsigned int, | |
185 | union internal_auxent *)); | |
186 | ||
187 | static struct type *decode_type PARAMS ((struct coff_symbol *, unsigned int, | |
188 | union internal_auxent *)); | |
189 | ||
190 | static struct type *decode_function_type PARAMS ((struct coff_symbol *, | |
191 | unsigned int, | |
192 | union internal_auxent *)); | |
193 | ||
194 | static struct type *coff_read_enum_type PARAMS ((int, int, int)); | |
195 | ||
196 | static struct symbol *process_coff_symbol PARAMS ((struct coff_symbol *, | |
197 | union internal_auxent *, | |
c906108c SS |
198 | struct objfile *)); |
199 | ||
200 | static void patch_opaque_types PARAMS ((struct symtab *)); | |
201 | ||
202 | static void patch_type PARAMS ((struct type *, struct type *)); | |
203 | ||
d4f3574e | 204 | static void enter_linenos PARAMS ((long, int, int, struct objfile *)); |
c906108c SS |
205 | |
206 | static void free_linetab PARAMS ((void)); | |
207 | ||
208 | static int init_lineno PARAMS ((bfd *, long, int)); | |
209 | ||
210 | static char *getsymname PARAMS ((struct internal_syment *)); | |
211 | ||
212 | static char *coff_getfilename PARAMS ((union internal_auxent *)); | |
213 | ||
214 | static void free_stringtab PARAMS ((void)); | |
215 | ||
216 | static int init_stringtab PARAMS ((bfd *, long)); | |
217 | ||
218 | static void read_one_sym PARAMS ((struct coff_symbol *, | |
219 | struct internal_syment *, | |
220 | union internal_auxent *)); | |
221 | ||
96baa820 | 222 | static void coff_symtab_read PARAMS ((long, int, struct objfile *)); |
c906108c SS |
223 | |
224 | static void find_linenos PARAMS ((bfd *, sec_ptr, PTR)); | |
225 | ||
226 | static void coff_symfile_init PARAMS ((struct objfile *)); | |
227 | ||
228 | static void coff_new_init PARAMS ((struct objfile *)); | |
229 | ||
96baa820 | 230 | static void coff_symfile_read PARAMS ((struct objfile *, int)); |
c906108c SS |
231 | |
232 | static void coff_symfile_finish PARAMS ((struct objfile *)); | |
233 | ||
234 | static void record_minimal_symbol PARAMS ((char *, CORE_ADDR, | |
235 | enum minimal_symbol_type, | |
236 | struct objfile *)); | |
237 | ||
238 | static void coff_end_symtab PARAMS ((struct objfile *)); | |
239 | ||
240 | static void complete_symtab PARAMS ((char *, CORE_ADDR, unsigned int)); | |
241 | ||
242 | static void coff_start_symtab PARAMS ((char *)); | |
243 | ||
c906108c SS |
244 | static struct type *coff_alloc_type PARAMS ((int)); |
245 | ||
246 | static struct type **coff_lookup_type PARAMS ((int)); | |
247 | ||
248 | static void coff_locate_sections PARAMS ((bfd *, asection *, PTR)); | |
249 | \f | |
250 | /* We are called once per section from coff_symfile_read. We | |
251 | need to examine each section we are passed, check to see | |
252 | if it is something we are interested in processing, and | |
253 | if so, stash away some access information for the section. | |
254 | ||
255 | FIXME: The section names should not be hardwired strings (what | |
256 | should they be? I don't think most object file formats have enough | |
257 | section flags to specify what kind of debug section it is | |
258 | -kingdon). */ | |
259 | ||
260 | static void | |
261 | coff_locate_sections (abfd, sectp, csip) | |
262 | bfd *abfd; | |
263 | asection *sectp; | |
264 | PTR csip; | |
265 | { | |
266 | register struct coff_symfile_info *csi; | |
267 | const char *name; | |
268 | ||
269 | csi = (struct coff_symfile_info *) csip; | |
270 | name = bfd_get_section_name (abfd, sectp); | |
271 | if (STREQ (name, ".text")) | |
272 | { | |
273 | csi->textaddr = bfd_section_vma (abfd, sectp); | |
274 | csi->textsize += bfd_section_size (abfd, sectp); | |
275 | } | |
276 | else if (strncmp (name, ".text", sizeof ".text" - 1) == 0) | |
277 | { | |
278 | csi->textsize += bfd_section_size (abfd, sectp); | |
279 | } | |
280 | else if (STREQ (name, ".stabstr")) | |
281 | { | |
282 | csi->stabstrsect = sectp; | |
283 | } | |
284 | else if (strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
285 | { | |
286 | const char *s; | |
287 | ||
288 | /* We can have multiple .stab sections if linked with | |
289 | --split-by-reloc. */ | |
290 | for (s = name + sizeof ".stab" - 1; *s != '\0'; s++) | |
c5aa993b | 291 | if (!isdigit (*s)) |
c906108c SS |
292 | break; |
293 | if (*s == '\0') | |
294 | { | |
295 | struct stab_section_list *n, **pn; | |
296 | ||
297 | n = ((struct stab_section_list *) | |
298 | xmalloc (sizeof (struct stab_section_list))); | |
299 | n->section = sectp; | |
300 | n->next = NULL; | |
301 | for (pn = &csi->stabsects; *pn != NULL; pn = &(*pn)->next) | |
302 | ; | |
303 | *pn = n; | |
304 | ||
305 | /* This will be run after coffstab_build_psymtabs is called | |
c5aa993b JM |
306 | in coff_symfile_read, at which point we no longer need |
307 | the information. */ | |
c906108c SS |
308 | make_cleanup (free, n); |
309 | } | |
310 | } | |
311 | } | |
312 | ||
313 | /* Return the section_offsets* that CS points to. */ | |
314 | static int cs_to_section PARAMS ((struct coff_symbol *, struct objfile *)); | |
315 | ||
c5aa993b JM |
316 | struct find_targ_sec_arg |
317 | { | |
318 | int targ_index; | |
319 | asection **resultp; | |
320 | }; | |
c906108c SS |
321 | |
322 | static void find_targ_sec PARAMS ((bfd *, asection *, void *)); | |
323 | ||
c5aa993b JM |
324 | static void |
325 | find_targ_sec (abfd, sect, obj) | |
c906108c SS |
326 | bfd *abfd; |
327 | asection *sect; | |
328 | PTR obj; | |
329 | { | |
c5aa993b | 330 | struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj; |
c906108c SS |
331 | if (sect->target_index == args->targ_index) |
332 | *args->resultp = sect; | |
333 | } | |
334 | ||
335 | /* Return the section number (SECT_OFF_*) that CS points to. */ | |
336 | static int | |
337 | cs_to_section (cs, objfile) | |
338 | struct coff_symbol *cs; | |
339 | struct objfile *objfile; | |
340 | { | |
341 | asection *sect = NULL; | |
342 | struct find_targ_sec_arg args; | |
343 | int off = SECT_OFF_TEXT; | |
344 | ||
345 | args.targ_index = cs->c_secnum; | |
346 | args.resultp = § | |
347 | bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); | |
348 | if (sect != NULL) | |
349 | { | |
350 | /* This is the section. Figure out what SECT_OFF_* code it is. */ | |
351 | if (bfd_get_section_flags (abfd, sect) & SEC_CODE) | |
352 | off = SECT_OFF_TEXT; | |
353 | else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD) | |
354 | off = SECT_OFF_DATA; | |
355 | else | |
356 | off = SECT_OFF_BSS; | |
357 | } | |
358 | return off; | |
359 | } | |
360 | ||
361 | /* Return the address of the section of a COFF symbol. */ | |
362 | ||
363 | static CORE_ADDR cs_section_address PARAMS ((struct coff_symbol *, bfd *)); | |
364 | ||
365 | static CORE_ADDR | |
366 | cs_section_address (cs, abfd) | |
367 | struct coff_symbol *cs; | |
368 | bfd *abfd; | |
369 | { | |
370 | asection *sect = NULL; | |
371 | struct find_targ_sec_arg args; | |
372 | CORE_ADDR addr = 0; | |
373 | ||
374 | args.targ_index = cs->c_secnum; | |
375 | args.resultp = § | |
376 | bfd_map_over_sections (abfd, find_targ_sec, &args); | |
377 | if (sect != NULL) | |
378 | addr = bfd_get_section_vma (objfile->obfd, sect); | |
379 | return addr; | |
380 | } | |
381 | ||
382 | /* Look up a coff type-number index. Return the address of the slot | |
383 | where the type for that index is stored. | |
384 | The type-number is in INDEX. | |
385 | ||
386 | This can be used for finding the type associated with that index | |
387 | or for associating a new type with the index. */ | |
388 | ||
389 | static struct type ** | |
390 | coff_lookup_type (index) | |
391 | register int index; | |
392 | { | |
393 | if (index >= type_vector_length) | |
394 | { | |
395 | int old_vector_length = type_vector_length; | |
396 | ||
397 | type_vector_length *= 2; | |
c5aa993b | 398 | if (index /* is still */ >= type_vector_length) |
c906108c SS |
399 | type_vector_length = index * 2; |
400 | ||
401 | type_vector = (struct type **) | |
402 | xrealloc ((char *) type_vector, | |
403 | type_vector_length * sizeof (struct type *)); | |
404 | memset (&type_vector[old_vector_length], 0, | |
c5aa993b | 405 | (type_vector_length - old_vector_length) * sizeof (struct type *)); |
c906108c SS |
406 | } |
407 | return &type_vector[index]; | |
408 | } | |
409 | ||
410 | /* Make sure there is a type allocated for type number index | |
411 | and return the type object. | |
412 | This can create an empty (zeroed) type object. */ | |
413 | ||
414 | static struct type * | |
415 | coff_alloc_type (index) | |
416 | int index; | |
417 | { | |
418 | register struct type **type_addr = coff_lookup_type (index); | |
419 | register struct type *type = *type_addr; | |
420 | ||
421 | /* If we are referring to a type not known at all yet, | |
422 | allocate an empty type for it. | |
423 | We will fill it in later if we find out how. */ | |
424 | if (type == NULL) | |
425 | { | |
426 | type = alloc_type (current_objfile); | |
427 | *type_addr = type; | |
428 | } | |
429 | return type; | |
430 | } | |
431 | \f | |
c906108c SS |
432 | /* Start a new symtab for a new source file. |
433 | This is called when a COFF ".file" symbol is seen; | |
434 | it indicates the start of data for one original source file. */ | |
435 | ||
436 | static void | |
437 | coff_start_symtab (name) | |
c5aa993b | 438 | char *name; |
c906108c SS |
439 | { |
440 | start_symtab ( | |
c5aa993b JM |
441 | /* We fill in the filename later. start_symtab puts |
442 | this pointer into last_source_file and we put it in | |
443 | subfiles->name, which end_symtab frees; that's why | |
444 | it must be malloc'd. */ | |
445 | savestring (name, strlen (name)), | |
446 | /* We never know the directory name for COFF. */ | |
447 | NULL, | |
448 | /* The start address is irrelevant, since we set | |
449 | last_source_start_addr in coff_end_symtab. */ | |
450 | 0); | |
c906108c | 451 | record_debugformat ("COFF"); |
c906108c SS |
452 | } |
453 | ||
454 | /* Save the vital information from when starting to read a file, | |
455 | for use when closing off the current file. | |
456 | NAME is the file name the symbols came from, START_ADDR is the first | |
457 | text address for the file, and SIZE is the number of bytes of text. */ | |
458 | ||
459 | static void | |
460 | complete_symtab (name, start_addr, size) | |
c5aa993b JM |
461 | char *name; |
462 | CORE_ADDR start_addr; | |
463 | unsigned int size; | |
c906108c SS |
464 | { |
465 | if (last_source_file != NULL) | |
466 | free (last_source_file); | |
467 | last_source_file = savestring (name, strlen (name)); | |
468 | current_source_start_addr = start_addr; | |
469 | current_source_end_addr = start_addr + size; | |
470 | ||
c5aa993b JM |
471 | if (current_objfile->ei.entry_point >= current_source_start_addr && |
472 | current_objfile->ei.entry_point < current_source_end_addr) | |
c906108c | 473 | { |
c5aa993b JM |
474 | current_objfile->ei.entry_file_lowpc = current_source_start_addr; |
475 | current_objfile->ei.entry_file_highpc = current_source_end_addr; | |
c906108c SS |
476 | } |
477 | } | |
478 | ||
479 | /* Finish the symbol definitions for one main source file, | |
480 | close off all the lexical contexts for that file | |
481 | (creating struct block's for them), then make the | |
482 | struct symtab for that file and put it in the list of all such. */ | |
483 | ||
484 | static void | |
485 | coff_end_symtab (objfile) | |
486 | struct objfile *objfile; | |
487 | { | |
488 | struct symtab *symtab; | |
489 | ||
490 | last_source_start_addr = current_source_start_addr; | |
491 | ||
c906108c SS |
492 | symtab = end_symtab (current_source_end_addr, objfile, 0); |
493 | ||
494 | if (symtab != NULL) | |
495 | free_named_symtabs (symtab->filename); | |
496 | ||
497 | /* Reinitialize for beginning of new file. */ | |
c906108c SS |
498 | last_source_file = NULL; |
499 | } | |
500 | \f | |
501 | static void | |
502 | record_minimal_symbol (name, address, type, objfile) | |
503 | char *name; | |
504 | CORE_ADDR address; | |
505 | enum minimal_symbol_type type; | |
506 | struct objfile *objfile; | |
507 | { | |
508 | /* We don't want TDESC entry points in the minimal symbol table */ | |
c5aa993b JM |
509 | if (name[0] == '@') |
510 | return; | |
c906108c SS |
511 | |
512 | prim_record_minimal_symbol (name, address, type, objfile); | |
513 | } | |
514 | \f | |
515 | /* coff_symfile_init () | |
516 | is the coff-specific initialization routine for reading symbols. | |
517 | It is passed a struct objfile which contains, among other things, | |
518 | the BFD for the file whose symbols are being read, and a slot for | |
519 | a pointer to "private data" which we fill with cookies and other | |
520 | treats for coff_symfile_read (). | |
521 | ||
522 | We will only be called if this is a COFF or COFF-like file. | |
523 | BFD handles figuring out the format of the file, and code in symtab.c | |
524 | uses BFD's determination to vector to us. | |
525 | ||
526 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ | |
527 | ||
528 | static void | |
529 | coff_symfile_init (objfile) | |
530 | struct objfile *objfile; | |
531 | { | |
532 | /* Allocate struct to keep track of stab reading. */ | |
533 | objfile->sym_stab_info = (struct dbx_symfile_info *) | |
534 | xmmalloc (objfile->md, sizeof (struct dbx_symfile_info)); | |
535 | ||
536 | memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info)); | |
537 | ||
538 | /* Allocate struct to keep track of the symfile */ | |
539 | objfile->sym_private = xmmalloc (objfile->md, | |
540 | sizeof (struct coff_symfile_info)); | |
541 | ||
542 | memset (objfile->sym_private, 0, sizeof (struct coff_symfile_info)); | |
543 | ||
544 | /* COFF objects may be reordered, so set OBJF_REORDERED. If we | |
545 | find this causes a significant slowdown in gdb then we could | |
546 | set it in the debug symbol readers only when necessary. */ | |
547 | objfile->flags |= OBJF_REORDERED; | |
548 | ||
549 | init_entry_point_info (objfile); | |
550 | } | |
551 | ||
552 | /* This function is called for every section; it finds the outer limits | |
553 | of the line table (minimum and maximum file offset) so that the | |
554 | mainline code can read the whole thing for efficiency. */ | |
555 | ||
556 | /* ARGSUSED */ | |
557 | static void | |
558 | find_linenos (abfd, asect, vpinfo) | |
559 | bfd *abfd; | |
560 | sec_ptr asect; | |
561 | PTR vpinfo; | |
562 | { | |
563 | struct coff_symfile_info *info; | |
564 | int size, count; | |
565 | file_ptr offset, maxoff; | |
566 | ||
567 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
568 | count = asect->lineno_count; | |
569 | /* End of warning */ | |
570 | ||
571 | if (count == 0) | |
572 | return; | |
573 | size = count * local_linesz; | |
574 | ||
c5aa993b | 575 | info = (struct coff_symfile_info *) vpinfo; |
c906108c SS |
576 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
577 | offset = asect->line_filepos; | |
578 | /* End of warning */ | |
579 | ||
580 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) | |
581 | info->min_lineno_offset = offset; | |
582 | ||
583 | maxoff = offset + size; | |
584 | if (maxoff > info->max_lineno_offset) | |
585 | info->max_lineno_offset = maxoff; | |
586 | } | |
587 | ||
588 | ||
589 | /* The BFD for this file -- only good while we're actively reading | |
590 | symbols into a psymtab or a symtab. */ | |
591 | ||
592 | static bfd *symfile_bfd; | |
593 | ||
594 | /* Read a symbol file, after initialization by coff_symfile_init. */ | |
595 | ||
596 | /* ARGSUSED */ | |
597 | static void | |
96baa820 | 598 | coff_symfile_read (objfile, mainline) |
c906108c | 599 | struct objfile *objfile; |
c906108c SS |
600 | int mainline; |
601 | { | |
602 | struct coff_symfile_info *info; | |
603 | struct dbx_symfile_info *dbxinfo; | |
604 | bfd *abfd = objfile->obfd; | |
605 | coff_data_type *cdata = coff_data (abfd); | |
606 | char *name = bfd_get_filename (abfd); | |
607 | register int val; | |
608 | int num_symbols; | |
609 | int symtab_offset; | |
610 | int stringtab_offset; | |
611 | struct cleanup *back_to; | |
612 | int stabstrsize; | |
613 | ||
c5aa993b | 614 | info = (struct coff_symfile_info *) objfile->sym_private; |
c906108c | 615 | dbxinfo = objfile->sym_stab_info; |
c5aa993b | 616 | symfile_bfd = abfd; /* Kludge for swap routines */ |
c906108c SS |
617 | |
618 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
c5aa993b JM |
619 | num_symbols = bfd_get_symcount (abfd); /* How many syms */ |
620 | symtab_offset = cdata->sym_filepos; /* Symbol table file offset */ | |
621 | stringtab_offset = symtab_offset + /* String table file offset */ | |
622 | num_symbols * cdata->local_symesz; | |
c906108c SS |
623 | |
624 | /* Set a few file-statics that give us specific information about | |
625 | the particular COFF file format we're reading. */ | |
c906108c SS |
626 | local_n_btmask = cdata->local_n_btmask; |
627 | local_n_btshft = cdata->local_n_btshft; | |
c5aa993b | 628 | local_n_tmask = cdata->local_n_tmask; |
c906108c | 629 | local_n_tshift = cdata->local_n_tshift; |
c5aa993b JM |
630 | local_linesz = cdata->local_linesz; |
631 | local_symesz = cdata->local_symesz; | |
632 | local_auxesz = cdata->local_auxesz; | |
c906108c SS |
633 | |
634 | /* Allocate space for raw symbol and aux entries, based on their | |
635 | space requirements as reported by BFD. */ | |
636 | temp_sym = (char *) xmalloc | |
c5aa993b | 637 | (cdata->local_symesz + cdata->local_auxesz); |
c906108c SS |
638 | temp_aux = temp_sym + cdata->local_symesz; |
639 | back_to = make_cleanup ((make_cleanup_func) free_current_contents, &temp_sym); | |
640 | ||
641 | /* We need to know whether this is a PE file, because in PE files, | |
642 | unlike standard COFF files, symbol values are stored as offsets | |
643 | from the section address, rather than as absolute addresses. | |
644 | FIXME: We should use BFD to read the symbol table, and thus avoid | |
645 | this problem. */ | |
646 | pe_file = strncmp (bfd_get_target (objfile->obfd), "pe", 2) == 0; | |
647 | ||
648 | /* End of warning */ | |
649 | ||
650 | /* Read the line number table, all at once. */ | |
651 | info->min_lineno_offset = 0; | |
652 | info->max_lineno_offset = 0; | |
653 | bfd_map_over_sections (abfd, find_linenos, (PTR) info); | |
654 | ||
655 | make_cleanup ((make_cleanup_func) free_linetab, 0); | |
c5aa993b | 656 | val = init_lineno (abfd, info->min_lineno_offset, |
c906108c SS |
657 | info->max_lineno_offset - info->min_lineno_offset); |
658 | if (val < 0) | |
659 | error ("\"%s\": error reading line numbers\n", name); | |
660 | ||
661 | /* Now read the string table, all at once. */ | |
662 | ||
663 | make_cleanup ((make_cleanup_func) free_stringtab, 0); | |
664 | val = init_stringtab (abfd, stringtab_offset); | |
665 | if (val < 0) | |
666 | error ("\"%s\": can't get string table", name); | |
667 | ||
668 | init_minimal_symbol_collection (); | |
669 | make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0); | |
670 | ||
671 | /* Now that the executable file is positioned at symbol table, | |
672 | process it and define symbols accordingly. */ | |
673 | ||
96baa820 | 674 | coff_symtab_read ((long) symtab_offset, num_symbols, objfile); |
c906108c SS |
675 | |
676 | /* Sort symbols alphabetically within each block. */ | |
677 | ||
678 | { | |
679 | struct symtab *s; | |
680 | ||
c5aa993b | 681 | for (s = objfile->symtabs; s != NULL; s = s->next) |
c906108c SS |
682 | sort_symtab_syms (s); |
683 | } | |
684 | ||
685 | /* Install any minimal symbols that have been collected as the current | |
686 | minimal symbols for this objfile. */ | |
687 | ||
688 | install_minimal_symbols (objfile); | |
689 | ||
690 | bfd_map_over_sections (abfd, coff_locate_sections, (PTR) info); | |
691 | ||
692 | if (info->stabsects) | |
693 | { | |
c5aa993b | 694 | if (!info->stabstrsect) |
b83266a0 SS |
695 | { |
696 | error_begin (); | |
697 | fprintf_filtered | |
698 | (gdb_stderr, | |
699 | ("The debugging information in `%s' is corrupted.\n" | |
c5aa993b | 700 | "The file has a `.stabs' section, but no `.stabstr' section.\n"), |
b83266a0 SS |
701 | name); |
702 | return_to_top_level (RETURN_ERROR); | |
703 | } | |
704 | ||
c906108c | 705 | /* FIXME: dubious. Why can't we use something normal like |
c5aa993b | 706 | bfd_get_section_contents? */ |
c906108c SS |
707 | bfd_seek (abfd, abfd->where, 0); |
708 | ||
709 | stabstrsize = bfd_section_size (abfd, info->stabstrsect); | |
710 | ||
711 | coffstab_build_psymtabs (objfile, | |
c906108c SS |
712 | mainline, |
713 | info->textaddr, info->textsize, | |
714 | info->stabsects, | |
715 | info->stabstrsect->filepos, stabstrsize); | |
716 | } | |
717 | ||
718 | do_cleanups (back_to); | |
719 | } | |
720 | ||
721 | static void | |
722 | coff_new_init (ignore) | |
723 | struct objfile *ignore; | |
724 | { | |
725 | } | |
726 | ||
727 | /* Perform any local cleanups required when we are done with a particular | |
728 | objfile. I.E, we are in the process of discarding all symbol information | |
729 | for an objfile, freeing up all memory held for it, and unlinking the | |
730 | objfile struct from the global list of known objfiles. */ | |
731 | ||
732 | static void | |
733 | coff_symfile_finish (objfile) | |
734 | struct objfile *objfile; | |
735 | { | |
c5aa993b | 736 | if (objfile->sym_private != NULL) |
c906108c | 737 | { |
c5aa993b | 738 | mfree (objfile->md, objfile->sym_private); |
c906108c | 739 | } |
7be570e7 JM |
740 | |
741 | /* Let stabs reader clean up */ | |
742 | stabsread_clear_cache (); | |
c906108c | 743 | } |
c906108c | 744 | \f |
c5aa993b | 745 | |
c906108c SS |
746 | /* Given pointers to a symbol table in coff style exec file, |
747 | analyze them and create struct symtab's describing the symbols. | |
748 | NSYMS is the number of symbols in the symbol table. | |
749 | We read them one at a time using read_one_sym (). */ | |
750 | ||
751 | static void | |
96baa820 | 752 | coff_symtab_read (symtab_offset, nsyms, objfile) |
c906108c SS |
753 | long symtab_offset; |
754 | int nsyms; | |
c906108c SS |
755 | struct objfile *objfile; |
756 | { | |
757 | register struct context_stack *new; | |
758 | struct coff_symbol coff_symbol; | |
759 | register struct coff_symbol *cs = &coff_symbol; | |
760 | static struct internal_syment main_sym; | |
761 | static union internal_auxent main_aux; | |
762 | struct coff_symbol fcn_cs_saved; | |
763 | static struct internal_syment fcn_sym_saved; | |
764 | static union internal_auxent fcn_aux_saved; | |
765 | struct symtab *s; | |
766 | /* A .file is open. */ | |
767 | int in_source_file = 0; | |
768 | int next_file_symnum = -1; | |
769 | /* Name of the current file. */ | |
770 | char *filestring = ""; | |
771 | int depth = 0; | |
772 | int fcn_first_line = 0; | |
cd0fc7c3 | 773 | CORE_ADDR fcn_first_line_addr; |
c906108c SS |
774 | int fcn_last_line = 0; |
775 | int fcn_start_addr = 0; | |
776 | long fcn_line_ptr = 0; | |
777 | int val; | |
778 | CORE_ADDR tmpaddr; | |
779 | ||
780 | /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous.... | |
781 | it's hard to know I've really worked around it. The fix should be | |
782 | harmless, anyway). The symptom of the bug is that the first | |
783 | fread (in read_one_sym), will (in my example) actually get data | |
784 | from file offset 268, when the fseek was to 264 (and ftell shows | |
785 | 264). This causes all hell to break loose. I was unable to | |
786 | reproduce this on a short test program which operated on the same | |
787 | file, performing (I think) the same sequence of operations. | |
788 | ||
789 | It stopped happening when I put in this (former) rewind(). | |
790 | ||
791 | FIXME: Find out if this has been reported to Sun, whether it has | |
792 | been fixed in a later release, etc. */ | |
793 | ||
794 | bfd_seek (objfile->obfd, 0, 0); | |
795 | ||
796 | /* Position to read the symbol table. */ | |
797 | val = bfd_seek (objfile->obfd, (long) symtab_offset, 0); | |
798 | if (val < 0) | |
799 | perror_with_name (objfile->name); | |
800 | ||
801 | current_objfile = objfile; | |
802 | nlist_bfd_global = objfile->obfd; | |
803 | nlist_nsyms_global = nsyms; | |
804 | last_source_file = NULL; | |
805 | memset (opaque_type_chain, 0, sizeof opaque_type_chain); | |
806 | ||
c5aa993b | 807 | if (type_vector) /* Get rid of previous one */ |
c906108c SS |
808 | free ((PTR) type_vector); |
809 | type_vector_length = 160; | |
810 | type_vector = (struct type **) | |
811 | xmalloc (type_vector_length * sizeof (struct type *)); | |
812 | memset (type_vector, 0, type_vector_length * sizeof (struct type *)); | |
813 | ||
814 | coff_start_symtab (""); | |
815 | ||
816 | symnum = 0; | |
817 | while (symnum < nsyms) | |
818 | { | |
819 | QUIT; /* Make this command interruptable. */ | |
820 | ||
821 | read_one_sym (cs, &main_sym, &main_aux); | |
822 | ||
823 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) | |
824 | { | |
825 | if (last_source_file) | |
826 | coff_end_symtab (objfile); | |
827 | ||
828 | coff_start_symtab ("_globals_"); | |
829 | complete_symtab ("_globals_", 0, 0); | |
830 | /* done with all files, everything from here on out is globals */ | |
831 | } | |
832 | ||
833 | /* Special case for file with type declarations only, no text. */ | |
834 | if (!last_source_file && SDB_TYPE (cs->c_type) | |
835 | && cs->c_secnum == N_DEBUG) | |
836 | complete_symtab (filestring, 0, 0); | |
837 | ||
838 | /* Typedefs should not be treated as symbol definitions. */ | |
839 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) | |
840 | { | |
841 | /* Record all functions -- external and static -- in minsyms. */ | |
96baa820 | 842 | tmpaddr = cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
c906108c SS |
843 | record_minimal_symbol (cs->c_name, tmpaddr, mst_text, objfile); |
844 | ||
845 | fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; | |
846 | fcn_start_addr = tmpaddr; | |
847 | fcn_cs_saved = *cs; | |
848 | fcn_sym_saved = main_sym; | |
849 | fcn_aux_saved = main_aux; | |
850 | continue; | |
851 | } | |
852 | ||
853 | switch (cs->c_sclass) | |
854 | { | |
c5aa993b JM |
855 | case C_EFCN: |
856 | case C_EXTDEF: | |
857 | case C_ULABEL: | |
858 | case C_USTATIC: | |
859 | case C_LINE: | |
860 | case C_ALIAS: | |
861 | case C_HIDDEN: | |
862 | complain (&bad_sclass_complaint, cs->c_name); | |
863 | break; | |
c906108c | 864 | |
c5aa993b JM |
865 | case C_FILE: |
866 | /* c_value field contains symnum of next .file entry in table | |
867 | or symnum of first global after last .file. */ | |
868 | next_file_symnum = cs->c_value; | |
869 | if (cs->c_naux > 0) | |
870 | filestring = coff_getfilename (&main_aux); | |
871 | else | |
872 | filestring = ""; | |
873 | ||
874 | /* Complete symbol table for last object file | |
875 | containing debugging information. */ | |
876 | if (last_source_file) | |
877 | { | |
878 | coff_end_symtab (objfile); | |
879 | coff_start_symtab (filestring); | |
880 | } | |
881 | in_source_file = 1; | |
882 | break; | |
c906108c SS |
883 | |
884 | /* C_LABEL is used for labels and static functions. Including | |
885 | it here allows gdb to see static functions when no debug | |
886 | info is available. */ | |
c5aa993b JM |
887 | case C_LABEL: |
888 | /* However, labels within a function can make weird backtraces, | |
889 | so filter them out (from phdm@macqel.be). */ | |
890 | if (within_function) | |
891 | break; | |
892 | case C_STAT: | |
893 | case C_THUMBLABEL: | |
894 | case C_THUMBSTAT: | |
895 | case C_THUMBSTATFUNC: | |
896 | if (cs->c_name[0] == '.') | |
897 | { | |
898 | if (STREQ (cs->c_name, ".text")) | |
899 | { | |
c906108c SS |
900 | /* FIXME: don't wire in ".text" as section name |
901 | or symbol name! */ | |
902 | /* Check for in_source_file deals with case of | |
903 | a file with debugging symbols | |
904 | followed by a later file with no symbols. */ | |
905 | if (in_source_file) | |
906 | complete_symtab (filestring, | |
96baa820 | 907 | cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT), |
c906108c SS |
908 | main_aux.x_scn.x_scnlen); |
909 | in_source_file = 0; | |
910 | } | |
c5aa993b | 911 | /* flush rest of '.' symbols */ |
c906108c | 912 | break; |
c5aa993b JM |
913 | } |
914 | else if (!SDB_TYPE (cs->c_type) | |
915 | && cs->c_name[0] == 'L' | |
916 | && (strncmp (cs->c_name, "LI%", 3) == 0 | |
917 | || strncmp (cs->c_name, "LF%", 3) == 0 | |
918 | || strncmp (cs->c_name, "LC%", 3) == 0 | |
919 | || strncmp (cs->c_name, "LP%", 3) == 0 | |
920 | || strncmp (cs->c_name, "LPB%", 4) == 0 | |
921 | || strncmp (cs->c_name, "LBB%", 4) == 0 | |
922 | || strncmp (cs->c_name, "LBE%", 4) == 0 | |
923 | || strncmp (cs->c_name, "LPBX%", 5) == 0)) | |
924 | /* At least on a 3b1, gcc generates swbeg and string labels | |
925 | that look like this. Ignore them. */ | |
926 | break; | |
927 | /* fall in for static symbols that don't start with '.' */ | |
928 | case C_THUMBEXT: | |
929 | case C_THUMBEXTFUNC: | |
930 | case C_EXT: | |
931 | { | |
932 | /* Record it in the minimal symbols regardless of | |
933 | SDB_TYPE. This parallels what we do for other debug | |
934 | formats, and probably is needed to make | |
935 | print_address_symbolic work right without the (now | |
936 | gone) "set fast-symbolic-addr off" kludge. */ | |
c906108c | 937 | |
c5aa993b JM |
938 | /* FIXME: should use mst_abs, and not relocate, if absolute. */ |
939 | enum minimal_symbol_type ms_type; | |
940 | int sec; | |
c906108c | 941 | |
c5aa993b JM |
942 | if (cs->c_secnum == N_UNDEF) |
943 | { | |
944 | /* This is a common symbol. See if the target | |
945 | environment knows where it has been relocated to. */ | |
946 | CORE_ADDR reladdr; | |
947 | if (target_lookup_symbol (cs->c_name, &reladdr)) | |
948 | { | |
949 | /* Error in lookup; ignore symbol. */ | |
950 | break; | |
951 | } | |
952 | tmpaddr = reladdr; | |
953 | /* The address has already been relocated; make sure that | |
954 | objfile_relocate doesn't relocate it again. */ | |
955 | sec = -2; | |
956 | ms_type = cs->c_sclass == C_EXT | |
957 | || cs->c_sclass == C_THUMBEXT ? | |
958 | mst_bss : mst_file_bss; | |
959 | } | |
960 | else | |
961 | { | |
962 | sec = cs_to_section (cs, objfile); | |
963 | tmpaddr = cs->c_value; | |
964 | if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC | |
965 | || cs->c_sclass == C_THUMBEXT) | |
96baa820 | 966 | tmpaddr += ANOFFSET (objfile->section_offsets, sec); |
c906108c | 967 | |
c5aa993b JM |
968 | switch (sec) |
969 | { | |
970 | case SECT_OFF_TEXT: | |
971 | case SECT_OFF_RODATA: | |
972 | ms_type = | |
973 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC | |
974 | || cs->c_sclass == C_THUMBEXT ? | |
975 | mst_text : mst_file_text; | |
c906108c | 976 | #ifdef SMASH_TEXT_ADDRESS |
c5aa993b JM |
977 | if (tmpaddr & 1) /* FIXME: delete this line */ |
978 | SMASH_TEXT_ADDRESS (tmpaddr); | |
c906108c | 979 | #endif |
c5aa993b JM |
980 | break; |
981 | case SECT_OFF_DATA: | |
982 | ms_type = | |
983 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? | |
984 | mst_data : mst_file_data; | |
985 | break; | |
986 | case SECT_OFF_BSS: | |
987 | ms_type = | |
988 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? | |
989 | mst_data : mst_file_data; | |
990 | break; | |
991 | default: | |
992 | ms_type = mst_unknown; | |
993 | break; | |
994 | } | |
995 | } | |
c906108c | 996 | |
c5aa993b JM |
997 | if (cs->c_name[0] != '@' /* Skip tdesc symbols */ ) |
998 | { | |
999 | struct minimal_symbol *msym; | |
c906108c | 1000 | |
c5aa993b JM |
1001 | msym = prim_record_minimal_symbol_and_info |
1002 | (cs->c_name, tmpaddr, ms_type, (char *) cs->c_sclass, sec, | |
c906108c SS |
1003 | NULL, objfile); |
1004 | #ifdef COFF_MAKE_MSYMBOL_SPECIAL | |
c5aa993b JM |
1005 | if (msym) |
1006 | COFF_MAKE_MSYMBOL_SPECIAL (cs->c_sclass, msym); | |
c906108c | 1007 | #endif |
c5aa993b JM |
1008 | } |
1009 | if (SDB_TYPE (cs->c_type)) | |
1010 | { | |
1011 | struct symbol *sym; | |
1012 | sym = process_coff_symbol | |
96baa820 | 1013 | (cs, &main_aux, objfile); |
c5aa993b JM |
1014 | SYMBOL_VALUE (sym) = tmpaddr; |
1015 | SYMBOL_SECTION (sym) = sec; | |
1016 | } | |
1017 | } | |
1018 | break; | |
1019 | ||
1020 | case C_FCN: | |
1021 | if (STREQ (cs->c_name, ".bf")) | |
1022 | { | |
1023 | within_function = 1; | |
1024 | ||
1025 | /* value contains address of first non-init type code */ | |
1026 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1027 | contains line number of '{' } */ | |
1028 | if (cs->c_naux != 1) | |
1029 | complain (&bf_no_aux_complaint, cs->c_symnum); | |
1030 | fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1031 | fcn_first_line_addr = cs->c_value; | |
1032 | ||
1033 | /* Might want to check that locals are 0 and | |
1034 | context_stack_depth is zero, and complain if not. */ | |
1035 | ||
1036 | depth = 0; | |
1037 | new = push_context (depth, fcn_start_addr); | |
1038 | fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); | |
1039 | new->name = | |
96baa820 | 1040 | process_coff_symbol (&fcn_cs_saved, &fcn_aux_saved, objfile); |
c5aa993b JM |
1041 | } |
1042 | else if (STREQ (cs->c_name, ".ef")) | |
1043 | { | |
1044 | /* the value of .ef is the address of epilogue code; | |
1045 | not useful for gdb. */ | |
1046 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1047 | contains number of lines to '}' */ | |
1048 | ||
1049 | if (context_stack_depth <= 0) | |
1050 | { /* We attempted to pop an empty context stack */ | |
1051 | complain (&ef_stack_complaint, cs->c_symnum); | |
1052 | within_function = 0; | |
1053 | break; | |
c906108c | 1054 | } |
c5aa993b JM |
1055 | |
1056 | new = pop_context (); | |
1057 | /* Stack must be empty now. */ | |
1058 | if (context_stack_depth > 0 || new == NULL) | |
c906108c | 1059 | { |
c5aa993b JM |
1060 | complain (&ef_complaint, cs->c_symnum); |
1061 | within_function = 0; | |
1062 | break; | |
c906108c | 1063 | } |
c5aa993b JM |
1064 | if (cs->c_naux != 1) |
1065 | { | |
1066 | complain (&ef_no_aux_complaint, cs->c_symnum); | |
1067 | fcn_last_line = 0x7FFFFFFF; | |
1068 | } | |
1069 | else | |
1070 | { | |
1071 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1072 | } | |
1073 | /* fcn_first_line is the line number of the opening '{'. | |
1074 | Do not record it - because it would affect gdb's idea | |
1075 | of the line number of the first statement of the function - | |
1076 | except for one-line functions, for which it is also the line | |
1077 | number of all the statements and of the closing '}', and | |
1078 | for which we do not have any other statement-line-number. */ | |
1079 | if (fcn_last_line == 1) | |
1080 | record_line (current_subfile, fcn_first_line, | |
1081 | fcn_first_line_addr); | |
1082 | else | |
1083 | enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line, | |
d4f3574e | 1084 | objfile); |
c906108c | 1085 | |
c5aa993b JM |
1086 | finish_block (new->name, &local_symbols, new->old_blocks, |
1087 | new->start_addr, | |
c906108c | 1088 | #if defined (FUNCTION_EPILOGUE_SIZE) |
c5aa993b JM |
1089 | /* This macro should be defined only on |
1090 | machines where the | |
1091 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
1092 | field is always zero. | |
1093 | So use the .bf record information that | |
1094 | points to the epilogue and add the size | |
1095 | of the epilogue. */ | |
1096 | cs->c_value | |
1097 | + FUNCTION_EPILOGUE_SIZE | |
96baa820 | 1098 | + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT), |
c906108c | 1099 | #else |
c5aa993b JM |
1100 | fcn_cs_saved.c_value |
1101 | + fcn_aux_saved.x_sym.x_misc.x_fsize | |
96baa820 | 1102 | + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT), |
c906108c | 1103 | #endif |
c5aa993b JM |
1104 | objfile |
1105 | ); | |
1106 | within_function = 0; | |
1107 | } | |
1108 | break; | |
c906108c | 1109 | |
c5aa993b JM |
1110 | case C_BLOCK: |
1111 | if (STREQ (cs->c_name, ".bb")) | |
1112 | { | |
1113 | tmpaddr = cs->c_value; | |
96baa820 | 1114 | tmpaddr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
c5aa993b JM |
1115 | push_context (++depth, tmpaddr); |
1116 | } | |
1117 | else if (STREQ (cs->c_name, ".eb")) | |
1118 | { | |
1119 | if (context_stack_depth <= 0) | |
1120 | { /* We attempted to pop an empty context stack */ | |
1121 | complain (&eb_stack_complaint, cs->c_symnum); | |
1122 | break; | |
1123 | } | |
c906108c | 1124 | |
c5aa993b JM |
1125 | new = pop_context (); |
1126 | if (depth-- != new->depth) | |
1127 | { | |
1128 | complain (&eb_complaint, symnum); | |
1129 | break; | |
1130 | } | |
1131 | if (local_symbols && context_stack_depth > 0) | |
1132 | { | |
1133 | tmpaddr = | |
96baa820 | 1134 | cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
c5aa993b JM |
1135 | /* Make a block for the local symbols within. */ |
1136 | finish_block (0, &local_symbols, new->old_blocks, | |
1137 | new->start_addr, tmpaddr, objfile); | |
1138 | } | |
1139 | /* Now pop locals of block just finished. */ | |
1140 | local_symbols = new->locals; | |
1141 | } | |
1142 | break; | |
c906108c | 1143 | |
c5aa993b | 1144 | default: |
96baa820 | 1145 | process_coff_symbol (cs, &main_aux, objfile); |
c5aa993b | 1146 | break; |
c906108c SS |
1147 | } |
1148 | } | |
1149 | ||
1150 | if (last_source_file) | |
1151 | coff_end_symtab (objfile); | |
1152 | ||
1153 | /* Patch up any opaque types (references to types that are not defined | |
1154 | in the file where they are referenced, e.g. "struct foo *bar"). */ | |
1155 | ALL_OBJFILE_SYMTABS (objfile, s) | |
1156 | patch_opaque_types (s); | |
1157 | ||
1158 | current_objfile = NULL; | |
1159 | } | |
1160 | \f | |
1161 | /* Routines for reading headers and symbols from executable. */ | |
1162 | ||
1163 | /* Read the next symbol, swap it, and return it in both internal_syment | |
1164 | form, and coff_symbol form. Also return its first auxent, if any, | |
1165 | in internal_auxent form, and skip any other auxents. */ | |
1166 | ||
1167 | static void | |
1168 | read_one_sym (cs, sym, aux) | |
c5aa993b JM |
1169 | register struct coff_symbol *cs; |
1170 | register struct internal_syment *sym; | |
1171 | register union internal_auxent *aux; | |
c906108c SS |
1172 | { |
1173 | int i; | |
1174 | ||
1175 | cs->c_symnum = symnum; | |
1176 | bfd_read (temp_sym, local_symesz, 1, nlist_bfd_global); | |
c5aa993b | 1177 | bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *) sym); |
c906108c SS |
1178 | cs->c_naux = sym->n_numaux & 0xff; |
1179 | if (cs->c_naux >= 1) | |
1180 | { | |
c906108c | 1181 | bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global); |
c5aa993b JM |
1182 | bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass, |
1183 | 0, cs->c_naux, (char *) aux); | |
1184 | /* If more than one aux entry, read past it (only the first aux | |
1185 | is important). */ | |
1186 | for (i = 1; i < cs->c_naux; i++) | |
1187 | bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global); | |
c906108c SS |
1188 | } |
1189 | cs->c_name = getsymname (sym); | |
1190 | cs->c_value = sym->n_value; | |
1191 | cs->c_sclass = (sym->n_sclass & 0xff); | |
1192 | cs->c_secnum = sym->n_scnum; | |
1193 | cs->c_type = (unsigned) sym->n_type; | |
1194 | if (!SDB_TYPE (cs->c_type)) | |
1195 | cs->c_type = 0; | |
1196 | ||
1197 | #if 0 | |
1198 | if (cs->c_sclass & 128) | |
c5aa993b | 1199 | printf ("thumb symbol %s, class 0x%x\n", cs->c_name, cs->c_sclass); |
c906108c SS |
1200 | #endif |
1201 | ||
1202 | symnum += 1 + cs->c_naux; | |
1203 | ||
1204 | /* The PE file format stores symbol values as offsets within the | |
1205 | section, rather than as absolute addresses. We correct that | |
1206 | here, if the symbol has an appropriate storage class. FIXME: We | |
1207 | should use BFD to read the symbols, rather than duplicating the | |
1208 | work here. */ | |
1209 | if (pe_file) | |
1210 | { | |
1211 | switch (cs->c_sclass) | |
1212 | { | |
1213 | case C_EXT: | |
1214 | case C_THUMBEXT: | |
1215 | case C_THUMBEXTFUNC: | |
1216 | case C_SECTION: | |
1217 | case C_NT_WEAK: | |
1218 | case C_STAT: | |
1219 | case C_THUMBSTAT: | |
1220 | case C_THUMBSTATFUNC: | |
1221 | case C_LABEL: | |
1222 | case C_THUMBLABEL: | |
1223 | case C_BLOCK: | |
1224 | case C_FCN: | |
1225 | case C_EFCN: | |
1226 | if (cs->c_secnum != 0) | |
1227 | cs->c_value += cs_section_address (cs, symfile_bfd); | |
1228 | break; | |
1229 | } | |
1230 | } | |
1231 | } | |
1232 | \f | |
1233 | /* Support for string table handling */ | |
1234 | ||
1235 | static char *stringtab = NULL; | |
1236 | ||
1237 | static int | |
1238 | init_stringtab (abfd, offset) | |
c5aa993b JM |
1239 | bfd *abfd; |
1240 | long offset; | |
c906108c SS |
1241 | { |
1242 | long length; | |
1243 | int val; | |
1244 | unsigned char lengthbuf[4]; | |
1245 | ||
1246 | free_stringtab (); | |
1247 | ||
1248 | /* If the file is stripped, the offset might be zero, indicating no | |
1249 | string table. Just return with `stringtab' set to null. */ | |
1250 | if (offset == 0) | |
1251 | return 0; | |
1252 | ||
1253 | if (bfd_seek (abfd, offset, 0) < 0) | |
1254 | return -1; | |
1255 | ||
c5aa993b | 1256 | val = bfd_read ((char *) lengthbuf, sizeof lengthbuf, 1, abfd); |
c906108c | 1257 | length = bfd_h_get_32 (symfile_bfd, lengthbuf); |
c5aa993b | 1258 | |
c906108c SS |
1259 | /* If no string table is needed, then the file may end immediately |
1260 | after the symbols. Just return with `stringtab' set to null. */ | |
1261 | if (val != sizeof lengthbuf || length < sizeof lengthbuf) | |
1262 | return 0; | |
1263 | ||
1264 | stringtab = (char *) xmalloc (length); | |
1265 | /* This is in target format (probably not very useful, and not currently | |
1266 | used), not host format. */ | |
1267 | memcpy (stringtab, lengthbuf, sizeof lengthbuf); | |
c5aa993b | 1268 | if (length == sizeof length) /* Empty table -- just the count */ |
c906108c SS |
1269 | return 0; |
1270 | ||
1271 | val = bfd_read (stringtab + sizeof lengthbuf, length - sizeof lengthbuf, 1, abfd); | |
1272 | if (val != length - sizeof lengthbuf || stringtab[length - 1] != '\0') | |
1273 | return -1; | |
1274 | ||
1275 | return 0; | |
1276 | } | |
1277 | ||
1278 | static void | |
1279 | free_stringtab () | |
1280 | { | |
1281 | if (stringtab) | |
1282 | free (stringtab); | |
1283 | stringtab = NULL; | |
1284 | } | |
1285 | ||
1286 | static char * | |
1287 | getsymname (symbol_entry) | |
c5aa993b | 1288 | struct internal_syment *symbol_entry; |
c906108c | 1289 | { |
c5aa993b | 1290 | static char buffer[SYMNMLEN + 1]; |
c906108c SS |
1291 | char *result; |
1292 | ||
1293 | if (symbol_entry->_n._n_n._n_zeroes == 0) | |
1294 | { | |
1295 | /* FIXME: Probably should be detecting corrupt symbol files by | |
c5aa993b | 1296 | seeing whether offset points to within the stringtab. */ |
c906108c SS |
1297 | result = stringtab + symbol_entry->_n._n_n._n_offset; |
1298 | } | |
1299 | else | |
1300 | { | |
1301 | strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN); | |
1302 | buffer[SYMNMLEN] = '\0'; | |
1303 | result = buffer; | |
1304 | } | |
1305 | return result; | |
1306 | } | |
1307 | ||
1308 | /* Extract the file name from the aux entry of a C_FILE symbol. Return | |
1309 | only the last component of the name. Result is in static storage and | |
1310 | is only good for temporary use. */ | |
1311 | ||
1312 | static char * | |
1313 | coff_getfilename (aux_entry) | |
c5aa993b | 1314 | union internal_auxent *aux_entry; |
c906108c SS |
1315 | { |
1316 | static char buffer[BUFSIZ]; | |
1317 | register char *temp; | |
1318 | char *result; | |
1319 | ||
1320 | if (aux_entry->x_file.x_n.x_zeroes == 0) | |
1321 | strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); | |
1322 | else | |
1323 | { | |
1324 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); | |
1325 | buffer[FILNMLEN] = '\0'; | |
1326 | } | |
1327 | result = buffer; | |
1328 | ||
1329 | /* FIXME: We should not be throwing away the information about what | |
1330 | directory. It should go into dirname of the symtab, or some such | |
1331 | place. */ | |
1332 | if ((temp = strrchr (result, '/')) != NULL) | |
1333 | result = temp + 1; | |
1334 | return (result); | |
1335 | } | |
1336 | \f | |
1337 | /* Support for line number handling. */ | |
1338 | ||
1339 | static char *linetab = NULL; | |
1340 | static long linetab_offset; | |
1341 | static unsigned long linetab_size; | |
1342 | ||
1343 | /* Read in all the line numbers for fast lookups later. Leave them in | |
1344 | external (unswapped) format in memory; we'll swap them as we enter | |
1345 | them into GDB's data structures. */ | |
c5aa993b | 1346 | |
c906108c SS |
1347 | static int |
1348 | init_lineno (abfd, offset, size) | |
c5aa993b JM |
1349 | bfd *abfd; |
1350 | long offset; | |
1351 | int size; | |
c906108c SS |
1352 | { |
1353 | int val; | |
1354 | ||
1355 | linetab_offset = offset; | |
1356 | linetab_size = size; | |
1357 | ||
c5aa993b | 1358 | free_linetab (); |
c906108c SS |
1359 | |
1360 | if (size == 0) | |
1361 | return 0; | |
1362 | ||
1363 | if (bfd_seek (abfd, offset, 0) < 0) | |
1364 | return -1; | |
c5aa993b | 1365 | |
c906108c SS |
1366 | /* Allocate the desired table, plus a sentinel */ |
1367 | linetab = (char *) xmalloc (size + local_linesz); | |
1368 | ||
1369 | val = bfd_read (linetab, size, 1, abfd); | |
1370 | if (val != size) | |
1371 | return -1; | |
1372 | ||
1373 | /* Terminate it with an all-zero sentinel record */ | |
1374 | memset (linetab + size, 0, local_linesz); | |
1375 | ||
1376 | return 0; | |
1377 | } | |
1378 | ||
1379 | static void | |
1380 | free_linetab () | |
1381 | { | |
1382 | if (linetab) | |
1383 | free (linetab); | |
1384 | linetab = NULL; | |
1385 | } | |
1386 | ||
1387 | #if !defined (L_LNNO32) | |
1388 | #define L_LNNO32(lp) ((lp)->l_lnno) | |
1389 | #endif | |
1390 | ||
1391 | static void | |
d4f3574e | 1392 | enter_linenos (file_offset, first_line, last_line, objfile) |
c906108c SS |
1393 | long file_offset; |
1394 | register int first_line; | |
1395 | register int last_line; | |
d4f3574e | 1396 | struct objfile *objfile; |
c906108c SS |
1397 | { |
1398 | register char *rawptr; | |
1399 | struct internal_lineno lptr; | |
1400 | ||
1401 | if (!linetab) | |
c5aa993b | 1402 | return; |
c906108c SS |
1403 | if (file_offset < linetab_offset) |
1404 | { | |
1405 | complain (&lineno_complaint, file_offset); | |
1406 | if (file_offset > linetab_size) /* Too big to be an offset? */ | |
1407 | return; | |
c5aa993b | 1408 | file_offset += linetab_offset; /* Try reading at that linetab offset */ |
c906108c | 1409 | } |
c5aa993b | 1410 | |
c906108c SS |
1411 | rawptr = &linetab[file_offset - linetab_offset]; |
1412 | ||
1413 | /* skip first line entry for each function */ | |
1414 | rawptr += local_linesz; | |
1415 | /* line numbers start at one for the first line of the function */ | |
1416 | first_line--; | |
1417 | ||
c5aa993b JM |
1418 | for (;;) |
1419 | { | |
1420 | bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr); | |
1421 | rawptr += local_linesz; | |
1422 | /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */ | |
1423 | if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line) | |
1424 | record_line (current_subfile, first_line + L_LNNO32 (&lptr), | |
1425 | lptr.l_addr.l_paddr | |
d4f3574e | 1426 | + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT)); |
c5aa993b JM |
1427 | else |
1428 | break; | |
1429 | } | |
c906108c SS |
1430 | } |
1431 | \f | |
1432 | static void | |
1433 | patch_type (type, real_type) | |
c5aa993b JM |
1434 | struct type *type; |
1435 | struct type *real_type; | |
c906108c SS |
1436 | { |
1437 | register struct type *target = TYPE_TARGET_TYPE (type); | |
1438 | register struct type *real_target = TYPE_TARGET_TYPE (real_type); | |
1439 | int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); | |
1440 | ||
1441 | TYPE_LENGTH (target) = TYPE_LENGTH (real_target); | |
1442 | TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); | |
1443 | TYPE_FIELDS (target) = (struct field *) TYPE_ALLOC (target, field_size); | |
1444 | ||
1445 | memcpy (TYPE_FIELDS (target), TYPE_FIELDS (real_target), field_size); | |
1446 | ||
1447 | if (TYPE_NAME (real_target)) | |
1448 | { | |
1449 | if (TYPE_NAME (target)) | |
1450 | free (TYPE_NAME (target)); | |
1451 | TYPE_NAME (target) = concat (TYPE_NAME (real_target), NULL); | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | /* Patch up all appropriate typedef symbols in the opaque_type_chains | |
1456 | so that they can be used to print out opaque data structures properly. */ | |
1457 | ||
1458 | static void | |
1459 | patch_opaque_types (s) | |
1460 | struct symtab *s; | |
1461 | { | |
1462 | register struct block *b; | |
1463 | register int i; | |
1464 | register struct symbol *real_sym; | |
c5aa993b | 1465 | |
c906108c SS |
1466 | /* Go through the per-file symbols only */ |
1467 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); | |
1468 | for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--) | |
1469 | { | |
1470 | /* Find completed typedefs to use to fix opaque ones. | |
c5aa993b JM |
1471 | Remove syms from the chain when their types are stored, |
1472 | but search the whole chain, as there may be several syms | |
1473 | from different files with the same name. */ | |
c906108c SS |
1474 | real_sym = BLOCK_SYM (b, i); |
1475 | if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF && | |
1476 | SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE && | |
1477 | TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR && | |
1478 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) | |
1479 | { | |
1480 | register char *name = SYMBOL_NAME (real_sym); | |
1481 | register int hash = hashname (name); | |
1482 | register struct symbol *sym, *prev; | |
c5aa993b | 1483 | |
c906108c SS |
1484 | prev = 0; |
1485 | for (sym = opaque_type_chain[hash]; sym;) | |
1486 | { | |
1487 | if (name[0] == SYMBOL_NAME (sym)[0] && | |
1488 | STREQ (name + 1, SYMBOL_NAME (sym) + 1)) | |
1489 | { | |
1490 | if (prev) | |
1491 | { | |
1492 | SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); | |
1493 | } | |
1494 | else | |
1495 | { | |
1496 | opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); | |
1497 | } | |
c5aa993b | 1498 | |
c906108c | 1499 | patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); |
c5aa993b | 1500 | |
c906108c SS |
1501 | if (prev) |
1502 | { | |
1503 | sym = SYMBOL_VALUE_CHAIN (prev); | |
1504 | } | |
1505 | else | |
1506 | { | |
1507 | sym = opaque_type_chain[hash]; | |
1508 | } | |
1509 | } | |
1510 | else | |
1511 | { | |
1512 | prev = sym; | |
1513 | sym = SYMBOL_VALUE_CHAIN (sym); | |
1514 | } | |
1515 | } | |
1516 | } | |
1517 | } | |
1518 | } | |
1519 | \f | |
1520 | static struct symbol * | |
96baa820 | 1521 | process_coff_symbol (cs, aux, objfile) |
c906108c SS |
1522 | register struct coff_symbol *cs; |
1523 | register union internal_auxent *aux; | |
c906108c SS |
1524 | struct objfile *objfile; |
1525 | { | |
1526 | register struct symbol *sym | |
c5aa993b JM |
1527 | = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
1528 | sizeof (struct symbol)); | |
c906108c SS |
1529 | char *name; |
1530 | ||
1531 | memset (sym, 0, sizeof (struct symbol)); | |
1532 | name = cs->c_name; | |
1533 | name = EXTERNAL_NAME (name, objfile->obfd); | |
1534 | SYMBOL_NAME (sym) = obsavestring (name, strlen (name), | |
1535 | &objfile->symbol_obstack); | |
1536 | SYMBOL_LANGUAGE (sym) = language_auto; | |
1537 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); | |
1538 | ||
1539 | /* default assumptions */ | |
1540 | SYMBOL_VALUE (sym) = cs->c_value; | |
1541 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1542 | SYMBOL_SECTION (sym) = cs_to_section (cs, objfile); | |
1543 | ||
1544 | if (ISFCN (cs->c_type)) | |
1545 | { | |
96baa820 | 1546 | SYMBOL_VALUE (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
c5aa993b JM |
1547 | SYMBOL_TYPE (sym) = |
1548 | lookup_function_type (decode_function_type (cs, cs->c_type, aux)); | |
c906108c SS |
1549 | |
1550 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
1551 | if (cs->c_sclass == C_STAT || cs->c_sclass == C_THUMBSTAT | |
1552 | || cs->c_sclass == C_THUMBSTATFUNC) | |
1553 | add_symbol_to_list (sym, &file_symbols); | |
1554 | else if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT | |
1555 | || cs->c_sclass == C_THUMBEXTFUNC) | |
1556 | add_symbol_to_list (sym, &global_symbols); | |
1557 | } | |
1558 | else | |
1559 | { | |
1560 | SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux); | |
1561 | switch (cs->c_sclass) | |
1562 | { | |
c5aa993b JM |
1563 | case C_NULL: |
1564 | break; | |
c906108c | 1565 | |
c5aa993b JM |
1566 | case C_AUTO: |
1567 | SYMBOL_CLASS (sym) = LOC_LOCAL; | |
1568 | add_symbol_to_list (sym, &local_symbols); | |
1569 | break; | |
c906108c | 1570 | |
c5aa993b JM |
1571 | case C_THUMBEXT: |
1572 | case C_THUMBEXTFUNC: | |
1573 | case C_EXT: | |
1574 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1575 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
96baa820 | 1576 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
c5aa993b JM |
1577 | add_symbol_to_list (sym, &global_symbols); |
1578 | break; | |
c906108c | 1579 | |
c5aa993b JM |
1580 | case C_THUMBSTAT: |
1581 | case C_THUMBSTATFUNC: | |
1582 | case C_STAT: | |
1583 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1584 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
96baa820 | 1585 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); |
c5aa993b JM |
1586 | if (within_function) |
1587 | { | |
c906108c SS |
1588 | /* Static symbol of local scope */ |
1589 | add_symbol_to_list (sym, &local_symbols); | |
1590 | } | |
c5aa993b JM |
1591 | else |
1592 | { | |
c906108c SS |
1593 | /* Static symbol at top level of file */ |
1594 | add_symbol_to_list (sym, &file_symbols); | |
1595 | } | |
c5aa993b | 1596 | break; |
c906108c SS |
1597 | |
1598 | #ifdef C_GLBLREG /* AMD coff */ | |
c5aa993b | 1599 | case C_GLBLREG: |
c906108c | 1600 | #endif |
c5aa993b JM |
1601 | case C_REG: |
1602 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
1603 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM (cs->c_value); | |
1604 | add_symbol_to_list (sym, &local_symbols); | |
1605 | break; | |
c906108c | 1606 | |
c5aa993b JM |
1607 | case C_THUMBLABEL: |
1608 | case C_LABEL: | |
1609 | break; | |
c906108c | 1610 | |
c5aa993b JM |
1611 | case C_ARG: |
1612 | SYMBOL_CLASS (sym) = LOC_ARG; | |
1613 | add_symbol_to_list (sym, &local_symbols); | |
c906108c | 1614 | #if !defined (BELIEVE_PCC_PROMOTION) |
c5aa993b JM |
1615 | if (TARGET_BYTE_ORDER == BIG_ENDIAN) |
1616 | { | |
1617 | /* If PCC says a parameter is a short or a char, | |
1618 | aligned on an int boundary, realign it to the | |
1619 | "little end" of the int. */ | |
1620 | struct type *temptype; | |
1621 | temptype = lookup_fundamental_type (current_objfile, | |
1622 | FT_INTEGER); | |
1623 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) | |
1624 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT | |
1625 | && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (temptype)) | |
1626 | { | |
1627 | SYMBOL_VALUE (sym) += | |
1628 | TYPE_LENGTH (temptype) | |
1629 | - TYPE_LENGTH (SYMBOL_TYPE (sym)); | |
1630 | } | |
1631 | } | |
c906108c | 1632 | #endif |
c5aa993b | 1633 | break; |
c906108c | 1634 | |
c5aa993b JM |
1635 | case C_REGPARM: |
1636 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
1637 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM (cs->c_value); | |
1638 | add_symbol_to_list (sym, &local_symbols); | |
c906108c | 1639 | #if !defined (BELIEVE_PCC_PROMOTION) |
c5aa993b JM |
1640 | /* FIXME: This should retain the current type, since it's just |
1641 | a register value. gnu@adobe, 26Feb93 */ | |
1642 | { | |
1643 | /* If PCC says a parameter is a short or a char, | |
1644 | it is really an int. */ | |
1645 | struct type *temptype; | |
1646 | temptype = | |
1647 | lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1648 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) | |
1649 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT) | |
c906108c | 1650 | { |
c5aa993b JM |
1651 | SYMBOL_TYPE (sym) = |
1652 | (TYPE_UNSIGNED (SYMBOL_TYPE (sym)) | |
1653 | ? lookup_fundamental_type (current_objfile, | |
1654 | FT_UNSIGNED_INTEGER) | |
1655 | : temptype); | |
c906108c | 1656 | } |
c5aa993b | 1657 | } |
c906108c | 1658 | #endif |
c5aa993b | 1659 | break; |
c906108c | 1660 | |
c5aa993b JM |
1661 | case C_TPDEF: |
1662 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1663 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1664 | ||
1665 | /* If type has no name, give it one */ | |
1666 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
1667 | { | |
1668 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR | |
1669 | || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC) | |
1670 | { | |
1671 | /* If we are giving a name to a type such as "pointer to | |
1672 | foo" or "function returning foo", we better not set | |
1673 | the TYPE_NAME. If the program contains "typedef char | |
1674 | *caddr_t;", we don't want all variables of type char | |
1675 | * to print as caddr_t. This is not just a | |
1676 | consequence of GDB's type management; CC and GCC (at | |
1677 | least through version 2.4) both output variables of | |
1678 | either type char * or caddr_t with the type | |
1679 | refering to the C_TPDEF symbol for caddr_t. If a future | |
1680 | compiler cleans this up it GDB is not ready for it | |
1681 | yet, but if it becomes ready we somehow need to | |
1682 | disable this check (without breaking the PCC/GCC2.4 | |
1683 | case). | |
1684 | ||
1685 | Sigh. | |
1686 | ||
1687 | Fortunately, this check seems not to be necessary | |
1688 | for anything except pointers or functions. */ | |
1689 | ; | |
1690 | } | |
1691 | else | |
1692 | TYPE_NAME (SYMBOL_TYPE (sym)) = | |
1693 | concat (SYMBOL_NAME (sym), NULL); | |
1694 | } | |
c906108c | 1695 | #ifdef CXUX_TARGET |
c5aa993b JM |
1696 | /* Ignore vendor section for Harris CX/UX targets. */ |
1697 | else if (cs->c_name[0] == '$') | |
1698 | break; | |
c906108c SS |
1699 | #endif /* CXUX_TARGET */ |
1700 | ||
c5aa993b JM |
1701 | /* Keep track of any type which points to empty structured type, |
1702 | so it can be filled from a definition from another file. A | |
1703 | simple forward reference (TYPE_CODE_UNDEF) is not an | |
1704 | empty structured type, though; the forward references | |
1705 | work themselves out via the magic of coff_lookup_type. */ | |
1706 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && | |
1707 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0 && | |
1708 | TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) != | |
1709 | TYPE_CODE_UNDEF) | |
1710 | { | |
1711 | register int i = hashname (SYMBOL_NAME (sym)); | |
c906108c | 1712 | |
c5aa993b JM |
1713 | SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; |
1714 | opaque_type_chain[i] = sym; | |
1715 | } | |
1716 | add_symbol_to_list (sym, &file_symbols); | |
1717 | break; | |
c906108c | 1718 | |
c5aa993b JM |
1719 | case C_STRTAG: |
1720 | case C_UNTAG: | |
1721 | case C_ENTAG: | |
1722 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1723 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
1724 | ||
1725 | /* Some compilers try to be helpful by inventing "fake" | |
1726 | names for anonymous enums, structures, and unions, like | |
1727 | "~0fake" or ".0fake". Thanks, but no thanks... */ | |
1728 | if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0) | |
1729 | if (SYMBOL_NAME (sym) != NULL | |
1730 | && *SYMBOL_NAME (sym) != '~' | |
1731 | && *SYMBOL_NAME (sym) != '.') | |
1732 | TYPE_TAG_NAME (SYMBOL_TYPE (sym)) = | |
1733 | concat (SYMBOL_NAME (sym), NULL); | |
1734 | ||
1735 | add_symbol_to_list (sym, &file_symbols); | |
1736 | break; | |
c906108c | 1737 | |
c5aa993b JM |
1738 | default: |
1739 | break; | |
c906108c SS |
1740 | } |
1741 | } | |
1742 | return sym; | |
1743 | } | |
1744 | \f | |
1745 | /* Decode a coff type specifier; return the type that is meant. */ | |
1746 | ||
1747 | static struct type * | |
1748 | decode_type (cs, c_type, aux) | |
1749 | register struct coff_symbol *cs; | |
1750 | unsigned int c_type; | |
1751 | register union internal_auxent *aux; | |
1752 | { | |
1753 | register struct type *type = 0; | |
1754 | unsigned int new_c_type; | |
1755 | ||
1756 | if (c_type & ~N_BTMASK) | |
1757 | { | |
1758 | new_c_type = DECREF (c_type); | |
1759 | if (ISPTR (c_type)) | |
1760 | { | |
1761 | type = decode_type (cs, new_c_type, aux); | |
1762 | type = lookup_pointer_type (type); | |
1763 | } | |
1764 | else if (ISFCN (c_type)) | |
1765 | { | |
1766 | type = decode_type (cs, new_c_type, aux); | |
1767 | type = lookup_function_type (type); | |
1768 | } | |
1769 | else if (ISARY (c_type)) | |
1770 | { | |
1771 | int i, n; | |
1772 | register unsigned short *dim; | |
1773 | struct type *base_type, *index_type, *range_type; | |
1774 | ||
1775 | /* Define an array type. */ | |
1776 | /* auxent refers to array, not base type */ | |
1777 | if (aux->x_sym.x_tagndx.l == 0) | |
1778 | cs->c_naux = 0; | |
1779 | ||
1780 | /* shift the indices down */ | |
1781 | dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; | |
1782 | i = 1; | |
1783 | n = dim[0]; | |
1784 | for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) | |
1785 | *dim = *(dim + 1); | |
1786 | *dim = 0; | |
1787 | ||
1788 | base_type = decode_type (cs, new_c_type, aux); | |
1789 | index_type = lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1790 | range_type = | |
1791 | create_range_type ((struct type *) NULL, index_type, 0, n - 1); | |
1792 | type = | |
1793 | create_array_type ((struct type *) NULL, base_type, range_type); | |
1794 | } | |
1795 | return type; | |
1796 | } | |
1797 | ||
1798 | /* Reference to existing type. This only occurs with the | |
1799 | struct, union, and enum types. EPI a29k coff | |
1800 | fakes us out by producing aux entries with a nonzero | |
1801 | x_tagndx for definitions of structs, unions, and enums, so we | |
1802 | have to check the c_sclass field. SCO 3.2v4 cc gets confused | |
1803 | with pointers to pointers to defined structs, and generates | |
1804 | negative x_tagndx fields. */ | |
1805 | if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0) | |
1806 | { | |
1807 | if (cs->c_sclass != C_STRTAG | |
1808 | && cs->c_sclass != C_UNTAG | |
1809 | && cs->c_sclass != C_ENTAG | |
1810 | && aux->x_sym.x_tagndx.l >= 0) | |
1811 | { | |
1812 | type = coff_alloc_type (aux->x_sym.x_tagndx.l); | |
1813 | return type; | |
1814 | } | |
1815 | else | |
1816 | { | |
1817 | complain (&tagndx_bad_complaint, cs->c_name); | |
1818 | /* And fall through to decode_base_type... */ | |
1819 | } | |
1820 | } | |
1821 | ||
1822 | return decode_base_type (cs, BTYPE (c_type), aux); | |
1823 | } | |
1824 | ||
1825 | /* Decode a coff type specifier for function definition; | |
1826 | return the type that the function returns. */ | |
1827 | ||
1828 | static struct type * | |
1829 | decode_function_type (cs, c_type, aux) | |
1830 | register struct coff_symbol *cs; | |
1831 | unsigned int c_type; | |
1832 | register union internal_auxent *aux; | |
1833 | { | |
1834 | if (aux->x_sym.x_tagndx.l == 0) | |
c5aa993b | 1835 | cs->c_naux = 0; /* auxent refers to function, not base type */ |
c906108c SS |
1836 | |
1837 | return decode_type (cs, DECREF (c_type), aux); | |
1838 | } | |
1839 | \f | |
1840 | /* basic C types */ | |
1841 | ||
1842 | static struct type * | |
1843 | decode_base_type (cs, c_type, aux) | |
1844 | register struct coff_symbol *cs; | |
1845 | unsigned int c_type; | |
1846 | register union internal_auxent *aux; | |
1847 | { | |
1848 | struct type *type; | |
1849 | ||
1850 | switch (c_type) | |
1851 | { | |
c5aa993b JM |
1852 | case T_NULL: |
1853 | /* shows up with "void (*foo)();" structure members */ | |
1854 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
c906108c SS |
1855 | |
1856 | #if 0 | |
1857 | /* DGUX actually defines both T_ARG and T_VOID to the same value. */ | |
1858 | #ifdef T_ARG | |
c5aa993b JM |
1859 | case T_ARG: |
1860 | /* Shows up in DGUX, I think. Not sure where. */ | |
1861 | return lookup_fundamental_type (current_objfile, FT_VOID); /* shouldn't show up here */ | |
c906108c SS |
1862 | #endif |
1863 | #endif /* 0 */ | |
1864 | ||
1865 | #ifdef T_VOID | |
c5aa993b JM |
1866 | case T_VOID: |
1867 | /* Intel 960 COFF has this symbol and meaning. */ | |
1868 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
c906108c SS |
1869 | #endif |
1870 | ||
c5aa993b JM |
1871 | case T_CHAR: |
1872 | return lookup_fundamental_type (current_objfile, FT_CHAR); | |
c906108c | 1873 | |
c5aa993b JM |
1874 | case T_SHORT: |
1875 | return lookup_fundamental_type (current_objfile, FT_SHORT); | |
c906108c | 1876 | |
c5aa993b JM |
1877 | case T_INT: |
1878 | return lookup_fundamental_type (current_objfile, FT_INTEGER); | |
c906108c | 1879 | |
c5aa993b JM |
1880 | case T_LONG: |
1881 | if (cs->c_sclass == C_FIELD | |
1882 | && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) | |
1883 | return lookup_fundamental_type (current_objfile, FT_LONG_LONG); | |
1884 | else | |
1885 | return lookup_fundamental_type (current_objfile, FT_LONG); | |
c906108c | 1886 | |
c5aa993b JM |
1887 | case T_FLOAT: |
1888 | return lookup_fundamental_type (current_objfile, FT_FLOAT); | |
c906108c | 1889 | |
c5aa993b JM |
1890 | case T_DOUBLE: |
1891 | return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); | |
c906108c | 1892 | |
c5aa993b JM |
1893 | case T_LNGDBL: |
1894 | return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); | |
c906108c | 1895 | |
c5aa993b JM |
1896 | case T_STRUCT: |
1897 | if (cs->c_naux != 1) | |
1898 | { | |
1899 | /* anonymous structure type */ | |
1900 | type = coff_alloc_type (cs->c_symnum); | |
1901 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1902 | TYPE_NAME (type) = NULL; | |
1903 | /* This used to set the tag to "<opaque>". But I think setting it | |
1904 | to NULL is right, and the printing code can print it as | |
1905 | "struct {...}". */ | |
1906 | TYPE_TAG_NAME (type) = NULL; | |
1907 | INIT_CPLUS_SPECIFIC (type); | |
1908 | TYPE_LENGTH (type) = 0; | |
1909 | TYPE_FIELDS (type) = 0; | |
1910 | TYPE_NFIELDS (type) = 0; | |
1911 | } | |
1912 | else | |
1913 | { | |
1914 | type = coff_read_struct_type (cs->c_symnum, | |
1915 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1916 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
1917 | } | |
1918 | return type; | |
c906108c | 1919 | |
c5aa993b JM |
1920 | case T_UNION: |
1921 | if (cs->c_naux != 1) | |
1922 | { | |
1923 | /* anonymous union type */ | |
1924 | type = coff_alloc_type (cs->c_symnum); | |
1925 | TYPE_NAME (type) = NULL; | |
1926 | /* This used to set the tag to "<opaque>". But I think setting it | |
1927 | to NULL is right, and the printing code can print it as | |
1928 | "union {...}". */ | |
1929 | TYPE_TAG_NAME (type) = NULL; | |
1930 | INIT_CPLUS_SPECIFIC (type); | |
1931 | TYPE_LENGTH (type) = 0; | |
1932 | TYPE_FIELDS (type) = 0; | |
1933 | TYPE_NFIELDS (type) = 0; | |
1934 | } | |
1935 | else | |
1936 | { | |
1937 | type = coff_read_struct_type (cs->c_symnum, | |
c906108c | 1938 | aux->x_sym.x_misc.x_lnsz.x_size, |
c5aa993b JM |
1939 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); |
1940 | } | |
1941 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1942 | return type; | |
c906108c | 1943 | |
c5aa993b JM |
1944 | case T_ENUM: |
1945 | if (cs->c_naux != 1) | |
1946 | { | |
1947 | /* anonymous enum type */ | |
1948 | type = coff_alloc_type (cs->c_symnum); | |
1949 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
1950 | TYPE_NAME (type) = NULL; | |
1951 | /* This used to set the tag to "<opaque>". But I think setting it | |
1952 | to NULL is right, and the printing code can print it as | |
1953 | "enum {...}". */ | |
1954 | TYPE_TAG_NAME (type) = NULL; | |
1955 | TYPE_LENGTH (type) = 0; | |
1956 | TYPE_FIELDS (type) = 0; | |
1957 | TYPE_NFIELDS (type) = 0; | |
1958 | } | |
1959 | else | |
1960 | { | |
1961 | type = coff_read_enum_type (cs->c_symnum, | |
1962 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1963 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
1964 | } | |
1965 | return type; | |
1966 | ||
1967 | case T_MOE: | |
1968 | /* shouldn't show up here */ | |
1969 | break; | |
c906108c | 1970 | |
c5aa993b JM |
1971 | case T_UCHAR: |
1972 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); | |
c906108c | 1973 | |
c5aa993b JM |
1974 | case T_USHORT: |
1975 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); | |
c906108c | 1976 | |
c5aa993b JM |
1977 | case T_UINT: |
1978 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); | |
c906108c | 1979 | |
c5aa993b JM |
1980 | case T_ULONG: |
1981 | if (cs->c_sclass == C_FIELD | |
1982 | && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) | |
1983 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); | |
1984 | else | |
1985 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG); | |
c906108c SS |
1986 | } |
1987 | complain (&unexpected_type_complaint, cs->c_name); | |
1988 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
1989 | } | |
1990 | \f | |
1991 | /* This page contains subroutines of read_type. */ | |
1992 | ||
1993 | /* Read the description of a structure (or union type) and return an | |
1994 | object describing the type. */ | |
1995 | ||
1996 | static struct type * | |
1997 | coff_read_struct_type (index, length, lastsym) | |
1998 | int index; | |
1999 | int length; | |
2000 | int lastsym; | |
2001 | { | |
2002 | struct nextfield | |
2003 | { | |
2004 | struct nextfield *next; | |
2005 | struct field field; | |
2006 | }; | |
2007 | ||
2008 | register struct type *type; | |
2009 | register struct nextfield *list = 0; | |
2010 | struct nextfield *new; | |
2011 | int nfields = 0; | |
2012 | register int n; | |
2013 | char *name; | |
2014 | struct coff_symbol member_sym; | |
2015 | register struct coff_symbol *ms = &member_sym; | |
2016 | struct internal_syment sub_sym; | |
2017 | union internal_auxent sub_aux; | |
2018 | int done = 0; | |
2019 | ||
2020 | type = coff_alloc_type (index); | |
2021 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
c5aa993b | 2022 | INIT_CPLUS_SPECIFIC (type); |
c906108c SS |
2023 | TYPE_LENGTH (type) = length; |
2024 | ||
2025 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
2026 | { | |
2027 | read_one_sym (ms, &sub_sym, &sub_aux); | |
2028 | name = ms->c_name; | |
2029 | name = EXTERNAL_NAME (name, current_objfile->obfd); | |
2030 | ||
2031 | switch (ms->c_sclass) | |
2032 | { | |
c5aa993b JM |
2033 | case C_MOS: |
2034 | case C_MOU: | |
2035 | ||
2036 | /* Get space to record the next field's data. */ | |
2037 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
2038 | new->next = list; | |
2039 | list = new; | |
2040 | ||
2041 | /* Save the data. */ | |
2042 | list->field.name = | |
2043 | obsavestring (name, | |
2044 | strlen (name), | |
2045 | ¤t_objfile->symbol_obstack); | |
2046 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); | |
2047 | FIELD_BITPOS (list->field) = 8 * ms->c_value; | |
2048 | FIELD_BITSIZE (list->field) = 0; | |
2049 | nfields++; | |
2050 | break; | |
c906108c | 2051 | |
c5aa993b JM |
2052 | case C_FIELD: |
2053 | ||
2054 | /* Get space to record the next field's data. */ | |
2055 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
2056 | new->next = list; | |
2057 | list = new; | |
2058 | ||
2059 | /* Save the data. */ | |
2060 | list->field.name = | |
2061 | obsavestring (name, | |
2062 | strlen (name), | |
2063 | ¤t_objfile->symbol_obstack); | |
2064 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); | |
2065 | FIELD_BITPOS (list->field) = ms->c_value; | |
2066 | FIELD_BITSIZE (list->field) = sub_aux.x_sym.x_misc.x_lnsz.x_size; | |
2067 | nfields++; | |
2068 | break; | |
c906108c | 2069 | |
c5aa993b JM |
2070 | case C_EOS: |
2071 | done = 1; | |
2072 | break; | |
c906108c SS |
2073 | } |
2074 | } | |
2075 | /* Now create the vector of fields, and record how big it is. */ | |
2076 | ||
2077 | TYPE_NFIELDS (type) = nfields; | |
2078 | TYPE_FIELDS (type) = (struct field *) | |
2079 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
2080 | ||
2081 | /* Copy the saved-up fields into the field vector. */ | |
2082 | ||
2083 | for (n = nfields; list; list = list->next) | |
2084 | TYPE_FIELD (type, --n) = list->field; | |
2085 | ||
2086 | return type; | |
2087 | } | |
2088 | \f | |
2089 | /* Read a definition of an enumeration type, | |
2090 | and create and return a suitable type object. | |
2091 | Also defines the symbols that represent the values of the type. */ | |
2092 | ||
2093 | /* ARGSUSED */ | |
2094 | static struct type * | |
2095 | coff_read_enum_type (index, length, lastsym) | |
2096 | int index; | |
2097 | int length; | |
2098 | int lastsym; | |
2099 | { | |
2100 | register struct symbol *sym; | |
2101 | register struct type *type; | |
2102 | int nsyms = 0; | |
2103 | int done = 0; | |
2104 | struct pending **symlist; | |
2105 | struct coff_symbol member_sym; | |
2106 | register struct coff_symbol *ms = &member_sym; | |
2107 | struct internal_syment sub_sym; | |
2108 | union internal_auxent sub_aux; | |
2109 | struct pending *osyms, *syms; | |
2110 | int o_nsyms; | |
2111 | register int n; | |
2112 | char *name; | |
2113 | int unsigned_enum = 1; | |
2114 | ||
2115 | type = coff_alloc_type (index); | |
2116 | if (within_function) | |
2117 | symlist = &local_symbols; | |
2118 | else | |
2119 | symlist = &file_symbols; | |
2120 | osyms = *symlist; | |
2121 | o_nsyms = osyms ? osyms->nsyms : 0; | |
2122 | ||
2123 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
2124 | { | |
2125 | read_one_sym (ms, &sub_sym, &sub_aux); | |
2126 | name = ms->c_name; | |
2127 | name = EXTERNAL_NAME (name, current_objfile->obfd); | |
2128 | ||
2129 | switch (ms->c_sclass) | |
2130 | { | |
c5aa993b JM |
2131 | case C_MOE: |
2132 | sym = (struct symbol *) obstack_alloc | |
2133 | (¤t_objfile->symbol_obstack, | |
2134 | sizeof (struct symbol)); | |
2135 | memset (sym, 0, sizeof (struct symbol)); | |
2136 | ||
2137 | SYMBOL_NAME (sym) = | |
2138 | obsavestring (name, strlen (name), | |
2139 | ¤t_objfile->symbol_obstack); | |
2140 | SYMBOL_CLASS (sym) = LOC_CONST; | |
2141 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2142 | SYMBOL_VALUE (sym) = ms->c_value; | |
2143 | add_symbol_to_list (sym, symlist); | |
2144 | nsyms++; | |
2145 | break; | |
c906108c | 2146 | |
c5aa993b JM |
2147 | case C_EOS: |
2148 | /* Sometimes the linker (on 386/ix 2.0.2 at least) screws | |
2149 | up the count of how many symbols to read. So stop | |
2150 | on .eos. */ | |
2151 | done = 1; | |
2152 | break; | |
c906108c SS |
2153 | } |
2154 | } | |
2155 | ||
2156 | /* Now fill in the fields of the type-structure. */ | |
2157 | ||
2158 | if (length > 0) | |
2159 | TYPE_LENGTH (type) = length; | |
2160 | else | |
c5aa993b | 2161 | TYPE_LENGTH (type) = TARGET_INT_BIT / TARGET_CHAR_BIT; /* Assume ints */ |
c906108c SS |
2162 | TYPE_CODE (type) = TYPE_CODE_ENUM; |
2163 | TYPE_NFIELDS (type) = nsyms; | |
2164 | TYPE_FIELDS (type) = (struct field *) | |
2165 | TYPE_ALLOC (type, sizeof (struct field) * nsyms); | |
2166 | ||
2167 | /* Find the symbols for the values and put them into the type. | |
2168 | The symbols can be found in the symlist that we put them on | |
2169 | to cause them to be defined. osyms contains the old value | |
2170 | of that symlist; everything up to there was defined by us. */ | |
2171 | /* Note that we preserve the order of the enum constants, so | |
2172 | that in something like "enum {FOO, LAST_THING=FOO}" we print | |
2173 | FOO, not LAST_THING. */ | |
2174 | ||
2175 | for (syms = *symlist, n = 0; syms; syms = syms->next) | |
2176 | { | |
2177 | int j = 0; | |
2178 | ||
2179 | if (syms == osyms) | |
2180 | j = o_nsyms; | |
c5aa993b | 2181 | for (; j < syms->nsyms; j++, n++) |
c906108c SS |
2182 | { |
2183 | struct symbol *xsym = syms->symbol[j]; | |
2184 | SYMBOL_TYPE (xsym) = type; | |
2185 | TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym); | |
2186 | TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym); | |
2187 | if (SYMBOL_VALUE (xsym) < 0) | |
2188 | unsigned_enum = 0; | |
2189 | TYPE_FIELD_BITSIZE (type, n) = 0; | |
2190 | } | |
2191 | if (syms == osyms) | |
2192 | break; | |
2193 | } | |
2194 | ||
2195 | if (unsigned_enum) | |
2196 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; | |
2197 | ||
2198 | return type; | |
2199 | } | |
2200 | ||
2201 | /* Register our ability to parse symbols for coff BFD files. */ | |
2202 | ||
2203 | static struct sym_fns coff_sym_fns = | |
2204 | { | |
2205 | bfd_target_coff_flavour, | |
c5aa993b JM |
2206 | coff_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
2207 | coff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
2208 | coff_symfile_read, /* sym_read: read a symbol file into symtab */ | |
2209 | coff_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
96baa820 | 2210 | default_symfile_offsets, /* sym_offsets: xlate external to internal form */ |
c5aa993b | 2211 | NULL /* next: pointer to next struct sym_fns */ |
c906108c SS |
2212 | }; |
2213 | ||
2214 | void | |
2215 | _initialize_coffread () | |
2216 | { | |
2217 | add_symtab_fns (&coff_sym_fns); | |
2218 | } |