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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 | ||
a14ed312 | 46 | extern void _initialize_coffread (void); |
392a587b | 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 | |
a14ed312 | 179 | extern void stabsread_clear_cache (void); |
7be570e7 | 180 | |
a14ed312 | 181 | static struct type *coff_read_struct_type (int, int, int); |
c906108c | 182 | |
a14ed312 KB |
183 | static struct type *decode_base_type (struct coff_symbol *, |
184 | unsigned int, union internal_auxent *); | |
c906108c | 185 | |
a14ed312 KB |
186 | static struct type *decode_type (struct coff_symbol *, unsigned int, |
187 | union internal_auxent *); | |
c906108c | 188 | |
a14ed312 KB |
189 | static struct type *decode_function_type (struct coff_symbol *, |
190 | unsigned int, | |
191 | union internal_auxent *); | |
c906108c | 192 | |
a14ed312 | 193 | static struct type *coff_read_enum_type (int, int, int); |
c906108c | 194 | |
a14ed312 KB |
195 | static struct symbol *process_coff_symbol (struct coff_symbol *, |
196 | union internal_auxent *, | |
197 | struct objfile *); | |
c906108c | 198 | |
a14ed312 | 199 | static void patch_opaque_types (struct symtab *); |
c906108c | 200 | |
a14ed312 | 201 | static void patch_type (struct type *, struct type *); |
c906108c | 202 | |
a14ed312 | 203 | static void enter_linenos (long, int, int, struct objfile *); |
c906108c | 204 | |
a14ed312 | 205 | static void free_linetab (void); |
c906108c | 206 | |
74b7792f AC |
207 | static void free_linetab_cleanup (void *ignore); |
208 | ||
a14ed312 | 209 | static int init_lineno (bfd *, long, int); |
c906108c | 210 | |
a14ed312 | 211 | static char *getsymname (struct internal_syment *); |
c906108c | 212 | |
a14ed312 | 213 | static char *coff_getfilename (union internal_auxent *); |
c906108c | 214 | |
a14ed312 | 215 | static void free_stringtab (void); |
c906108c | 216 | |
74b7792f AC |
217 | static void free_stringtab_cleanup (void *ignore); |
218 | ||
a14ed312 | 219 | static int init_stringtab (bfd *, long); |
c906108c | 220 | |
a14ed312 KB |
221 | static void read_one_sym (struct coff_symbol *, |
222 | struct internal_syment *, union internal_auxent *); | |
c906108c | 223 | |
a14ed312 | 224 | static void coff_symtab_read (long, unsigned int, struct objfile *); |
c906108c | 225 | |
a14ed312 | 226 | static void find_linenos (bfd *, sec_ptr, PTR); |
c906108c | 227 | |
a14ed312 | 228 | static void coff_symfile_init (struct objfile *); |
c906108c | 229 | |
a14ed312 | 230 | static void coff_new_init (struct objfile *); |
c906108c | 231 | |
a14ed312 | 232 | static void coff_symfile_read (struct objfile *, int); |
c906108c | 233 | |
a14ed312 | 234 | static void coff_symfile_finish (struct objfile *); |
c906108c | 235 | |
a14ed312 KB |
236 | static void record_minimal_symbol (char *, CORE_ADDR, |
237 | enum minimal_symbol_type, | |
238 | struct objfile *); | |
c906108c | 239 | |
a14ed312 | 240 | static void coff_end_symtab (struct objfile *); |
c906108c | 241 | |
a14ed312 | 242 | static void complete_symtab (char *, CORE_ADDR, unsigned int); |
c906108c | 243 | |
a14ed312 | 244 | static void coff_start_symtab (char *); |
c906108c | 245 | |
a14ed312 | 246 | static struct type *coff_alloc_type (int); |
c906108c | 247 | |
a14ed312 | 248 | static struct type **coff_lookup_type (int); |
c906108c | 249 | |
a14ed312 | 250 | static void coff_locate_sections (bfd *, asection *, PTR); |
c906108c SS |
251 | \f |
252 | /* We are called once per section from coff_symfile_read. We | |
253 | need to examine each section we are passed, check to see | |
254 | if it is something we are interested in processing, and | |
255 | if so, stash away some access information for the section. | |
256 | ||
257 | FIXME: The section names should not be hardwired strings (what | |
258 | should they be? I don't think most object file formats have enough | |
259 | section flags to specify what kind of debug section it is | |
260 | -kingdon). */ | |
261 | ||
262 | static void | |
263 | coff_locate_sections (abfd, sectp, csip) | |
264 | bfd *abfd; | |
265 | asection *sectp; | |
266 | PTR csip; | |
267 | { | |
268 | register struct coff_symfile_info *csi; | |
269 | const char *name; | |
270 | ||
271 | csi = (struct coff_symfile_info *) csip; | |
272 | name = bfd_get_section_name (abfd, sectp); | |
273 | if (STREQ (name, ".text")) | |
274 | { | |
275 | csi->textaddr = bfd_section_vma (abfd, sectp); | |
276 | csi->textsize += bfd_section_size (abfd, sectp); | |
277 | } | |
278 | else if (strncmp (name, ".text", sizeof ".text" - 1) == 0) | |
279 | { | |
280 | csi->textsize += bfd_section_size (abfd, sectp); | |
281 | } | |
282 | else if (STREQ (name, ".stabstr")) | |
283 | { | |
284 | csi->stabstrsect = sectp; | |
285 | } | |
286 | else if (strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
287 | { | |
288 | const char *s; | |
289 | ||
290 | /* We can have multiple .stab sections if linked with | |
291 | --split-by-reloc. */ | |
292 | for (s = name + sizeof ".stab" - 1; *s != '\0'; s++) | |
c5aa993b | 293 | if (!isdigit (*s)) |
c906108c SS |
294 | break; |
295 | if (*s == '\0') | |
296 | { | |
297 | struct stab_section_list *n, **pn; | |
298 | ||
299 | n = ((struct stab_section_list *) | |
300 | xmalloc (sizeof (struct stab_section_list))); | |
301 | n->section = sectp; | |
302 | n->next = NULL; | |
303 | for (pn = &csi->stabsects; *pn != NULL; pn = &(*pn)->next) | |
304 | ; | |
305 | *pn = n; | |
306 | ||
307 | /* This will be run after coffstab_build_psymtabs is called | |
c5aa993b JM |
308 | in coff_symfile_read, at which point we no longer need |
309 | the information. */ | |
c906108c SS |
310 | make_cleanup (free, n); |
311 | } | |
312 | } | |
313 | } | |
314 | ||
315 | /* Return the section_offsets* that CS points to. */ | |
a14ed312 | 316 | static int cs_to_section (struct coff_symbol *, struct objfile *); |
c906108c | 317 | |
c5aa993b JM |
318 | struct find_targ_sec_arg |
319 | { | |
320 | int targ_index; | |
321 | asection **resultp; | |
322 | }; | |
c906108c | 323 | |
a14ed312 | 324 | static void find_targ_sec (bfd *, asection *, void *); |
c906108c | 325 | |
c5aa993b JM |
326 | static void |
327 | find_targ_sec (abfd, sect, obj) | |
c906108c SS |
328 | bfd *abfd; |
329 | asection *sect; | |
330 | PTR obj; | |
331 | { | |
c5aa993b | 332 | struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj; |
c906108c SS |
333 | if (sect->target_index == args->targ_index) |
334 | *args->resultp = sect; | |
335 | } | |
336 | ||
337 | /* Return the section number (SECT_OFF_*) that CS points to. */ | |
338 | static int | |
339 | cs_to_section (cs, objfile) | |
340 | struct coff_symbol *cs; | |
341 | struct objfile *objfile; | |
342 | { | |
343 | asection *sect = NULL; | |
344 | struct find_targ_sec_arg args; | |
b8fbeb18 | 345 | int off = SECT_OFF_TEXT (objfile); |
c906108c SS |
346 | |
347 | args.targ_index = cs->c_secnum; | |
348 | args.resultp = § | |
349 | bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); | |
350 | if (sect != NULL) | |
351 | { | |
352 | /* This is the section. Figure out what SECT_OFF_* code it is. */ | |
353 | if (bfd_get_section_flags (abfd, sect) & SEC_CODE) | |
b8fbeb18 | 354 | off = SECT_OFF_TEXT (objfile); |
c906108c | 355 | else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD) |
b8fbeb18 | 356 | off = SECT_OFF_DATA (objfile); |
c906108c | 357 | else |
b8fbeb18 | 358 | off = SECT_OFF_BSS (objfile); |
c906108c SS |
359 | } |
360 | return off; | |
361 | } | |
362 | ||
363 | /* Return the address of the section of a COFF symbol. */ | |
364 | ||
a14ed312 | 365 | static CORE_ADDR cs_section_address (struct coff_symbol *, bfd *); |
c906108c SS |
366 | |
367 | static CORE_ADDR | |
368 | cs_section_address (cs, abfd) | |
369 | struct coff_symbol *cs; | |
370 | bfd *abfd; | |
371 | { | |
372 | asection *sect = NULL; | |
373 | struct find_targ_sec_arg args; | |
374 | CORE_ADDR addr = 0; | |
375 | ||
376 | args.targ_index = cs->c_secnum; | |
377 | args.resultp = § | |
378 | bfd_map_over_sections (abfd, find_targ_sec, &args); | |
379 | if (sect != NULL) | |
380 | addr = bfd_get_section_vma (objfile->obfd, sect); | |
381 | return addr; | |
382 | } | |
383 | ||
384 | /* Look up a coff type-number index. Return the address of the slot | |
385 | where the type for that index is stored. | |
386 | The type-number is in INDEX. | |
387 | ||
388 | This can be used for finding the type associated with that index | |
389 | or for associating a new type with the index. */ | |
390 | ||
391 | static struct type ** | |
392 | coff_lookup_type (index) | |
393 | register int index; | |
394 | { | |
395 | if (index >= type_vector_length) | |
396 | { | |
397 | int old_vector_length = type_vector_length; | |
398 | ||
399 | type_vector_length *= 2; | |
c5aa993b | 400 | if (index /* is still */ >= type_vector_length) |
c906108c SS |
401 | type_vector_length = index * 2; |
402 | ||
403 | type_vector = (struct type **) | |
404 | xrealloc ((char *) type_vector, | |
405 | type_vector_length * sizeof (struct type *)); | |
406 | memset (&type_vector[old_vector_length], 0, | |
c5aa993b | 407 | (type_vector_length - old_vector_length) * sizeof (struct type *)); |
c906108c SS |
408 | } |
409 | return &type_vector[index]; | |
410 | } | |
411 | ||
412 | /* Make sure there is a type allocated for type number index | |
413 | and return the type object. | |
414 | This can create an empty (zeroed) type object. */ | |
415 | ||
416 | static struct type * | |
417 | coff_alloc_type (index) | |
418 | int index; | |
419 | { | |
420 | register struct type **type_addr = coff_lookup_type (index); | |
421 | register struct type *type = *type_addr; | |
422 | ||
423 | /* If we are referring to a type not known at all yet, | |
424 | allocate an empty type for it. | |
425 | We will fill it in later if we find out how. */ | |
426 | if (type == NULL) | |
427 | { | |
428 | type = alloc_type (current_objfile); | |
429 | *type_addr = type; | |
430 | } | |
431 | return type; | |
432 | } | |
433 | \f | |
c906108c SS |
434 | /* Start a new symtab for a new source file. |
435 | This is called when a COFF ".file" symbol is seen; | |
436 | it indicates the start of data for one original source file. */ | |
437 | ||
438 | static void | |
439 | coff_start_symtab (name) | |
c5aa993b | 440 | char *name; |
c906108c SS |
441 | { |
442 | start_symtab ( | |
c5aa993b JM |
443 | /* We fill in the filename later. start_symtab puts |
444 | this pointer into last_source_file and we put it in | |
445 | subfiles->name, which end_symtab frees; that's why | |
446 | it must be malloc'd. */ | |
447 | savestring (name, strlen (name)), | |
448 | /* We never know the directory name for COFF. */ | |
449 | NULL, | |
450 | /* The start address is irrelevant, since we set | |
451 | last_source_start_addr in coff_end_symtab. */ | |
452 | 0); | |
c906108c | 453 | record_debugformat ("COFF"); |
c906108c SS |
454 | } |
455 | ||
456 | /* Save the vital information from when starting to read a file, | |
457 | for use when closing off the current file. | |
458 | NAME is the file name the symbols came from, START_ADDR is the first | |
459 | text address for the file, and SIZE is the number of bytes of text. */ | |
460 | ||
461 | static void | |
462 | complete_symtab (name, start_addr, size) | |
c5aa993b JM |
463 | char *name; |
464 | CORE_ADDR start_addr; | |
465 | unsigned int size; | |
c906108c SS |
466 | { |
467 | if (last_source_file != NULL) | |
468 | free (last_source_file); | |
469 | last_source_file = savestring (name, strlen (name)); | |
470 | current_source_start_addr = start_addr; | |
471 | current_source_end_addr = start_addr + size; | |
472 | ||
c5aa993b JM |
473 | if (current_objfile->ei.entry_point >= current_source_start_addr && |
474 | current_objfile->ei.entry_point < current_source_end_addr) | |
c906108c | 475 | { |
c5aa993b JM |
476 | current_objfile->ei.entry_file_lowpc = current_source_start_addr; |
477 | current_objfile->ei.entry_file_highpc = current_source_end_addr; | |
c906108c SS |
478 | } |
479 | } | |
480 | ||
481 | /* Finish the symbol definitions for one main source file, | |
482 | close off all the lexical contexts for that file | |
483 | (creating struct block's for them), then make the | |
484 | struct symtab for that file and put it in the list of all such. */ | |
485 | ||
486 | static void | |
487 | coff_end_symtab (objfile) | |
488 | struct objfile *objfile; | |
489 | { | |
490 | struct symtab *symtab; | |
491 | ||
492 | last_source_start_addr = current_source_start_addr; | |
493 | ||
c906108c SS |
494 | symtab = end_symtab (current_source_end_addr, objfile, 0); |
495 | ||
496 | if (symtab != NULL) | |
497 | free_named_symtabs (symtab->filename); | |
498 | ||
499 | /* Reinitialize for beginning of new file. */ | |
c906108c SS |
500 | last_source_file = NULL; |
501 | } | |
502 | \f | |
503 | static void | |
504 | record_minimal_symbol (name, address, type, objfile) | |
505 | char *name; | |
506 | CORE_ADDR address; | |
507 | enum minimal_symbol_type type; | |
508 | struct objfile *objfile; | |
509 | { | |
510 | /* We don't want TDESC entry points in the minimal symbol table */ | |
c5aa993b JM |
511 | if (name[0] == '@') |
512 | return; | |
c906108c SS |
513 | |
514 | prim_record_minimal_symbol (name, address, type, objfile); | |
515 | } | |
516 | \f | |
517 | /* coff_symfile_init () | |
518 | is the coff-specific initialization routine for reading symbols. | |
519 | It is passed a struct objfile which contains, among other things, | |
520 | the BFD for the file whose symbols are being read, and a slot for | |
521 | a pointer to "private data" which we fill with cookies and other | |
522 | treats for coff_symfile_read (). | |
523 | ||
524 | We will only be called if this is a COFF or COFF-like file. | |
525 | BFD handles figuring out the format of the file, and code in symtab.c | |
526 | uses BFD's determination to vector to us. | |
527 | ||
528 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ | |
529 | ||
530 | static void | |
531 | coff_symfile_init (objfile) | |
532 | struct objfile *objfile; | |
533 | { | |
534 | /* Allocate struct to keep track of stab reading. */ | |
535 | objfile->sym_stab_info = (struct dbx_symfile_info *) | |
536 | xmmalloc (objfile->md, sizeof (struct dbx_symfile_info)); | |
537 | ||
538 | memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info)); | |
539 | ||
540 | /* Allocate struct to keep track of the symfile */ | |
541 | objfile->sym_private = xmmalloc (objfile->md, | |
542 | sizeof (struct coff_symfile_info)); | |
543 | ||
544 | memset (objfile->sym_private, 0, sizeof (struct coff_symfile_info)); | |
545 | ||
546 | /* COFF objects may be reordered, so set OBJF_REORDERED. If we | |
547 | find this causes a significant slowdown in gdb then we could | |
548 | set it in the debug symbol readers only when necessary. */ | |
549 | objfile->flags |= OBJF_REORDERED; | |
550 | ||
551 | init_entry_point_info (objfile); | |
552 | } | |
553 | ||
554 | /* This function is called for every section; it finds the outer limits | |
555 | of the line table (minimum and maximum file offset) so that the | |
556 | mainline code can read the whole thing for efficiency. */ | |
557 | ||
558 | /* ARGSUSED */ | |
559 | static void | |
560 | find_linenos (abfd, asect, vpinfo) | |
561 | bfd *abfd; | |
562 | sec_ptr asect; | |
563 | PTR vpinfo; | |
564 | { | |
565 | struct coff_symfile_info *info; | |
566 | int size, count; | |
567 | file_ptr offset, maxoff; | |
568 | ||
569 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
570 | count = asect->lineno_count; | |
571 | /* End of warning */ | |
572 | ||
573 | if (count == 0) | |
574 | return; | |
575 | size = count * local_linesz; | |
576 | ||
c5aa993b | 577 | info = (struct coff_symfile_info *) vpinfo; |
c906108c SS |
578 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
579 | offset = asect->line_filepos; | |
580 | /* End of warning */ | |
581 | ||
582 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) | |
583 | info->min_lineno_offset = offset; | |
584 | ||
585 | maxoff = offset + size; | |
586 | if (maxoff > info->max_lineno_offset) | |
587 | info->max_lineno_offset = maxoff; | |
588 | } | |
589 | ||
590 | ||
591 | /* The BFD for this file -- only good while we're actively reading | |
592 | symbols into a psymtab or a symtab. */ | |
593 | ||
594 | static bfd *symfile_bfd; | |
595 | ||
596 | /* Read a symbol file, after initialization by coff_symfile_init. */ | |
597 | ||
598 | /* ARGSUSED */ | |
599 | static void | |
96baa820 | 600 | coff_symfile_read (objfile, mainline) |
c906108c | 601 | struct objfile *objfile; |
c906108c SS |
602 | int mainline; |
603 | { | |
604 | struct coff_symfile_info *info; | |
605 | struct dbx_symfile_info *dbxinfo; | |
606 | bfd *abfd = objfile->obfd; | |
607 | coff_data_type *cdata = coff_data (abfd); | |
608 | char *name = bfd_get_filename (abfd); | |
609 | register int val; | |
745b8ca0 | 610 | unsigned int num_symbols; |
c906108c SS |
611 | int symtab_offset; |
612 | int stringtab_offset; | |
613 | struct cleanup *back_to; | |
614 | int stabstrsize; | |
c2d11a7d JM |
615 | int len; |
616 | char * target; | |
617 | ||
c5aa993b | 618 | info = (struct coff_symfile_info *) objfile->sym_private; |
c906108c | 619 | dbxinfo = objfile->sym_stab_info; |
c5aa993b | 620 | symfile_bfd = abfd; /* Kludge for swap routines */ |
c906108c SS |
621 | |
622 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
c5aa993b JM |
623 | num_symbols = bfd_get_symcount (abfd); /* How many syms */ |
624 | symtab_offset = cdata->sym_filepos; /* Symbol table file offset */ | |
625 | stringtab_offset = symtab_offset + /* String table file offset */ | |
626 | num_symbols * cdata->local_symesz; | |
c906108c SS |
627 | |
628 | /* Set a few file-statics that give us specific information about | |
629 | the particular COFF file format we're reading. */ | |
c906108c SS |
630 | local_n_btmask = cdata->local_n_btmask; |
631 | local_n_btshft = cdata->local_n_btshft; | |
c5aa993b | 632 | local_n_tmask = cdata->local_n_tmask; |
c906108c | 633 | local_n_tshift = cdata->local_n_tshift; |
c5aa993b JM |
634 | local_linesz = cdata->local_linesz; |
635 | local_symesz = cdata->local_symesz; | |
636 | local_auxesz = cdata->local_auxesz; | |
c906108c SS |
637 | |
638 | /* Allocate space for raw symbol and aux entries, based on their | |
639 | space requirements as reported by BFD. */ | |
640 | temp_sym = (char *) xmalloc | |
c5aa993b | 641 | (cdata->local_symesz + cdata->local_auxesz); |
c906108c | 642 | temp_aux = temp_sym + cdata->local_symesz; |
c13c43fd | 643 | back_to = make_cleanup (free_current_contents, &temp_sym); |
c906108c SS |
644 | |
645 | /* We need to know whether this is a PE file, because in PE files, | |
646 | unlike standard COFF files, symbol values are stored as offsets | |
647 | from the section address, rather than as absolute addresses. | |
648 | FIXME: We should use BFD to read the symbol table, and thus avoid | |
649 | this problem. */ | |
0d06e24b JM |
650 | pe_file = |
651 | strncmp (bfd_get_target (objfile->obfd), "pe", 2) == 0 | |
652 | || strncmp (bfd_get_target (objfile->obfd), "epoc-pe", 7) == 0; | |
c906108c SS |
653 | |
654 | /* End of warning */ | |
655 | ||
656 | /* Read the line number table, all at once. */ | |
657 | info->min_lineno_offset = 0; | |
658 | info->max_lineno_offset = 0; | |
659 | bfd_map_over_sections (abfd, find_linenos, (PTR) info); | |
660 | ||
74b7792f | 661 | make_cleanup (free_linetab_cleanup, 0 /*ignore*/); |
c5aa993b | 662 | val = init_lineno (abfd, info->min_lineno_offset, |
c906108c SS |
663 | info->max_lineno_offset - info->min_lineno_offset); |
664 | if (val < 0) | |
665 | error ("\"%s\": error reading line numbers\n", name); | |
666 | ||
667 | /* Now read the string table, all at once. */ | |
668 | ||
74b7792f | 669 | make_cleanup (free_stringtab_cleanup, 0 /*ignore*/); |
c906108c SS |
670 | val = init_stringtab (abfd, stringtab_offset); |
671 | if (val < 0) | |
672 | error ("\"%s\": can't get string table", name); | |
673 | ||
674 | init_minimal_symbol_collection (); | |
56e290f4 | 675 | make_cleanup_discard_minimal_symbols (); |
c906108c SS |
676 | |
677 | /* Now that the executable file is positioned at symbol table, | |
678 | process it and define symbols accordingly. */ | |
679 | ||
96baa820 | 680 | coff_symtab_read ((long) symtab_offset, num_symbols, objfile); |
c906108c SS |
681 | |
682 | /* Sort symbols alphabetically within each block. */ | |
683 | ||
684 | { | |
685 | struct symtab *s; | |
686 | ||
c5aa993b | 687 | for (s = objfile->symtabs; s != NULL; s = s->next) |
c906108c SS |
688 | sort_symtab_syms (s); |
689 | } | |
690 | ||
691 | /* Install any minimal symbols that have been collected as the current | |
692 | minimal symbols for this objfile. */ | |
693 | ||
694 | install_minimal_symbols (objfile); | |
695 | ||
696 | bfd_map_over_sections (abfd, coff_locate_sections, (PTR) info); | |
697 | ||
698 | if (info->stabsects) | |
699 | { | |
c5aa993b | 700 | if (!info->stabstrsect) |
b83266a0 SS |
701 | { |
702 | error_begin (); | |
703 | fprintf_filtered | |
704 | (gdb_stderr, | |
705 | ("The debugging information in `%s' is corrupted.\n" | |
c5aa993b | 706 | "The file has a `.stabs' section, but no `.stabstr' section.\n"), |
b83266a0 SS |
707 | name); |
708 | return_to_top_level (RETURN_ERROR); | |
709 | } | |
710 | ||
c906108c | 711 | /* FIXME: dubious. Why can't we use something normal like |
c5aa993b | 712 | bfd_get_section_contents? */ |
c906108c SS |
713 | bfd_seek (abfd, abfd->where, 0); |
714 | ||
715 | stabstrsize = bfd_section_size (abfd, info->stabstrsect); | |
716 | ||
717 | coffstab_build_psymtabs (objfile, | |
c906108c SS |
718 | mainline, |
719 | info->textaddr, info->textsize, | |
720 | info->stabsects, | |
721 | info->stabstrsect->filepos, stabstrsize); | |
722 | } | |
723 | ||
724 | do_cleanups (back_to); | |
725 | } | |
726 | ||
727 | static void | |
728 | coff_new_init (ignore) | |
729 | struct objfile *ignore; | |
730 | { | |
731 | } | |
732 | ||
733 | /* Perform any local cleanups required when we are done with a particular | |
734 | objfile. I.E, we are in the process of discarding all symbol information | |
735 | for an objfile, freeing up all memory held for it, and unlinking the | |
736 | objfile struct from the global list of known objfiles. */ | |
737 | ||
738 | static void | |
739 | coff_symfile_finish (objfile) | |
740 | struct objfile *objfile; | |
741 | { | |
c5aa993b | 742 | if (objfile->sym_private != NULL) |
c906108c | 743 | { |
c5aa993b | 744 | mfree (objfile->md, objfile->sym_private); |
c906108c | 745 | } |
7be570e7 JM |
746 | |
747 | /* Let stabs reader clean up */ | |
748 | stabsread_clear_cache (); | |
c906108c | 749 | } |
c906108c | 750 | \f |
c5aa993b | 751 | |
c906108c SS |
752 | /* Given pointers to a symbol table in coff style exec file, |
753 | analyze them and create struct symtab's describing the symbols. | |
754 | NSYMS is the number of symbols in the symbol table. | |
755 | We read them one at a time using read_one_sym (). */ | |
756 | ||
757 | static void | |
96baa820 | 758 | coff_symtab_read (symtab_offset, nsyms, objfile) |
c906108c | 759 | long symtab_offset; |
745b8ca0 | 760 | unsigned int nsyms; |
c906108c SS |
761 | struct objfile *objfile; |
762 | { | |
763 | register struct context_stack *new; | |
764 | struct coff_symbol coff_symbol; | |
765 | register struct coff_symbol *cs = &coff_symbol; | |
766 | static struct internal_syment main_sym; | |
767 | static union internal_auxent main_aux; | |
768 | struct coff_symbol fcn_cs_saved; | |
769 | static struct internal_syment fcn_sym_saved; | |
770 | static union internal_auxent fcn_aux_saved; | |
771 | struct symtab *s; | |
772 | /* A .file is open. */ | |
773 | int in_source_file = 0; | |
774 | int next_file_symnum = -1; | |
775 | /* Name of the current file. */ | |
776 | char *filestring = ""; | |
777 | int depth = 0; | |
778 | int fcn_first_line = 0; | |
cd0fc7c3 | 779 | CORE_ADDR fcn_first_line_addr; |
c906108c SS |
780 | int fcn_last_line = 0; |
781 | int fcn_start_addr = 0; | |
782 | long fcn_line_ptr = 0; | |
783 | int val; | |
784 | CORE_ADDR tmpaddr; | |
785 | ||
786 | /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous.... | |
787 | it's hard to know I've really worked around it. The fix should be | |
788 | harmless, anyway). The symptom of the bug is that the first | |
789 | fread (in read_one_sym), will (in my example) actually get data | |
790 | from file offset 268, when the fseek was to 264 (and ftell shows | |
791 | 264). This causes all hell to break loose. I was unable to | |
792 | reproduce this on a short test program which operated on the same | |
793 | file, performing (I think) the same sequence of operations. | |
794 | ||
795 | It stopped happening when I put in this (former) rewind(). | |
796 | ||
797 | FIXME: Find out if this has been reported to Sun, whether it has | |
798 | been fixed in a later release, etc. */ | |
799 | ||
800 | bfd_seek (objfile->obfd, 0, 0); | |
801 | ||
802 | /* Position to read the symbol table. */ | |
803 | val = bfd_seek (objfile->obfd, (long) symtab_offset, 0); | |
804 | if (val < 0) | |
805 | perror_with_name (objfile->name); | |
806 | ||
807 | current_objfile = objfile; | |
808 | nlist_bfd_global = objfile->obfd; | |
809 | nlist_nsyms_global = nsyms; | |
810 | last_source_file = NULL; | |
811 | memset (opaque_type_chain, 0, sizeof opaque_type_chain); | |
812 | ||
c5aa993b | 813 | if (type_vector) /* Get rid of previous one */ |
c906108c SS |
814 | free ((PTR) type_vector); |
815 | type_vector_length = 160; | |
816 | type_vector = (struct type **) | |
817 | xmalloc (type_vector_length * sizeof (struct type *)); | |
818 | memset (type_vector, 0, type_vector_length * sizeof (struct type *)); | |
819 | ||
820 | coff_start_symtab (""); | |
821 | ||
822 | symnum = 0; | |
823 | while (symnum < nsyms) | |
824 | { | |
825 | QUIT; /* Make this command interruptable. */ | |
826 | ||
827 | read_one_sym (cs, &main_sym, &main_aux); | |
828 | ||
829 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) | |
830 | { | |
831 | if (last_source_file) | |
832 | coff_end_symtab (objfile); | |
833 | ||
834 | coff_start_symtab ("_globals_"); | |
835 | complete_symtab ("_globals_", 0, 0); | |
836 | /* done with all files, everything from here on out is globals */ | |
837 | } | |
838 | ||
839 | /* Special case for file with type declarations only, no text. */ | |
840 | if (!last_source_file && SDB_TYPE (cs->c_type) | |
841 | && cs->c_secnum == N_DEBUG) | |
842 | complete_symtab (filestring, 0, 0); | |
843 | ||
844 | /* Typedefs should not be treated as symbol definitions. */ | |
845 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) | |
846 | { | |
847 | /* Record all functions -- external and static -- in minsyms. */ | |
b8fbeb18 | 848 | tmpaddr = cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c SS |
849 | record_minimal_symbol (cs->c_name, tmpaddr, mst_text, objfile); |
850 | ||
851 | fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; | |
852 | fcn_start_addr = tmpaddr; | |
853 | fcn_cs_saved = *cs; | |
854 | fcn_sym_saved = main_sym; | |
855 | fcn_aux_saved = main_aux; | |
856 | continue; | |
857 | } | |
858 | ||
859 | switch (cs->c_sclass) | |
860 | { | |
c5aa993b JM |
861 | case C_EFCN: |
862 | case C_EXTDEF: | |
863 | case C_ULABEL: | |
864 | case C_USTATIC: | |
865 | case C_LINE: | |
866 | case C_ALIAS: | |
867 | case C_HIDDEN: | |
868 | complain (&bad_sclass_complaint, cs->c_name); | |
869 | break; | |
c906108c | 870 | |
c5aa993b JM |
871 | case C_FILE: |
872 | /* c_value field contains symnum of next .file entry in table | |
873 | or symnum of first global after last .file. */ | |
874 | next_file_symnum = cs->c_value; | |
875 | if (cs->c_naux > 0) | |
876 | filestring = coff_getfilename (&main_aux); | |
877 | else | |
878 | filestring = ""; | |
879 | ||
880 | /* Complete symbol table for last object file | |
881 | containing debugging information. */ | |
882 | if (last_source_file) | |
883 | { | |
884 | coff_end_symtab (objfile); | |
885 | coff_start_symtab (filestring); | |
886 | } | |
887 | in_source_file = 1; | |
888 | break; | |
c906108c SS |
889 | |
890 | /* C_LABEL is used for labels and static functions. Including | |
891 | it here allows gdb to see static functions when no debug | |
892 | info is available. */ | |
c5aa993b JM |
893 | case C_LABEL: |
894 | /* However, labels within a function can make weird backtraces, | |
895 | so filter them out (from phdm@macqel.be). */ | |
896 | if (within_function) | |
897 | break; | |
898 | case C_STAT: | |
899 | case C_THUMBLABEL: | |
900 | case C_THUMBSTAT: | |
901 | case C_THUMBSTATFUNC: | |
902 | if (cs->c_name[0] == '.') | |
903 | { | |
904 | if (STREQ (cs->c_name, ".text")) | |
905 | { | |
c906108c SS |
906 | /* FIXME: don't wire in ".text" as section name |
907 | or symbol name! */ | |
908 | /* Check for in_source_file deals with case of | |
909 | a file with debugging symbols | |
910 | followed by a later file with no symbols. */ | |
911 | if (in_source_file) | |
912 | complete_symtab (filestring, | |
b8fbeb18 | 913 | cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)), |
c906108c SS |
914 | main_aux.x_scn.x_scnlen); |
915 | in_source_file = 0; | |
916 | } | |
c5aa993b | 917 | /* flush rest of '.' symbols */ |
c906108c | 918 | break; |
c5aa993b JM |
919 | } |
920 | else if (!SDB_TYPE (cs->c_type) | |
921 | && cs->c_name[0] == 'L' | |
922 | && (strncmp (cs->c_name, "LI%", 3) == 0 | |
923 | || strncmp (cs->c_name, "LF%", 3) == 0 | |
924 | || strncmp (cs->c_name, "LC%", 3) == 0 | |
925 | || strncmp (cs->c_name, "LP%", 3) == 0 | |
926 | || strncmp (cs->c_name, "LPB%", 4) == 0 | |
927 | || strncmp (cs->c_name, "LBB%", 4) == 0 | |
928 | || strncmp (cs->c_name, "LBE%", 4) == 0 | |
929 | || strncmp (cs->c_name, "LPBX%", 5) == 0)) | |
930 | /* At least on a 3b1, gcc generates swbeg and string labels | |
931 | that look like this. Ignore them. */ | |
932 | break; | |
933 | /* fall in for static symbols that don't start with '.' */ | |
934 | case C_THUMBEXT: | |
935 | case C_THUMBEXTFUNC: | |
936 | case C_EXT: | |
937 | { | |
938 | /* Record it in the minimal symbols regardless of | |
939 | SDB_TYPE. This parallels what we do for other debug | |
940 | formats, and probably is needed to make | |
941 | print_address_symbolic work right without the (now | |
942 | gone) "set fast-symbolic-addr off" kludge. */ | |
c906108c | 943 | |
c5aa993b JM |
944 | /* FIXME: should use mst_abs, and not relocate, if absolute. */ |
945 | enum minimal_symbol_type ms_type; | |
946 | int sec; | |
c906108c | 947 | |
c5aa993b JM |
948 | if (cs->c_secnum == N_UNDEF) |
949 | { | |
950 | /* This is a common symbol. See if the target | |
951 | environment knows where it has been relocated to. */ | |
952 | CORE_ADDR reladdr; | |
953 | if (target_lookup_symbol (cs->c_name, &reladdr)) | |
954 | { | |
955 | /* Error in lookup; ignore symbol. */ | |
956 | break; | |
957 | } | |
958 | tmpaddr = reladdr; | |
959 | /* The address has already been relocated; make sure that | |
960 | objfile_relocate doesn't relocate it again. */ | |
961 | sec = -2; | |
962 | ms_type = cs->c_sclass == C_EXT | |
963 | || cs->c_sclass == C_THUMBEXT ? | |
964 | mst_bss : mst_file_bss; | |
965 | } | |
966 | else | |
967 | { | |
968 | sec = cs_to_section (cs, objfile); | |
969 | tmpaddr = cs->c_value; | |
970 | if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC | |
971 | || cs->c_sclass == C_THUMBEXT) | |
96baa820 | 972 | tmpaddr += ANOFFSET (objfile->section_offsets, sec); |
c906108c | 973 | |
2ec466f9 | 974 | if (sec == SECT_OFF_TEXT (objfile)) |
c5aa993b | 975 | { |
c5aa993b JM |
976 | ms_type = |
977 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC | |
978 | || cs->c_sclass == C_THUMBEXT ? | |
979 | mst_text : mst_file_text; | |
c906108c | 980 | #ifdef SMASH_TEXT_ADDRESS |
c5aa993b JM |
981 | if (tmpaddr & 1) /* FIXME: delete this line */ |
982 | SMASH_TEXT_ADDRESS (tmpaddr); | |
c906108c | 983 | #endif |
b8fbeb18 | 984 | } |
34e924c0 EZ |
985 | else if (sec == SECT_OFF_DATA (objfile)) |
986 | { | |
c5aa993b JM |
987 | ms_type = |
988 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? | |
989 | mst_data : mst_file_data; | |
34e924c0 EZ |
990 | } |
991 | else if (sec == SECT_OFF_BSS (objfile)) | |
992 | { | |
c5aa993b JM |
993 | ms_type = |
994 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? | |
995 | mst_data : mst_file_data; | |
34e924c0 EZ |
996 | } |
997 | else | |
998 | ms_type = mst_unknown; | |
c5aa993b | 999 | } |
c906108c | 1000 | |
c5aa993b JM |
1001 | if (cs->c_name[0] != '@' /* Skip tdesc symbols */ ) |
1002 | { | |
1003 | struct minimal_symbol *msym; | |
c906108c | 1004 | |
c5aa993b JM |
1005 | msym = prim_record_minimal_symbol_and_info |
1006 | (cs->c_name, tmpaddr, ms_type, (char *) cs->c_sclass, sec, | |
c906108c SS |
1007 | NULL, objfile); |
1008 | #ifdef COFF_MAKE_MSYMBOL_SPECIAL | |
c5aa993b JM |
1009 | if (msym) |
1010 | COFF_MAKE_MSYMBOL_SPECIAL (cs->c_sclass, msym); | |
c906108c | 1011 | #endif |
c5aa993b JM |
1012 | } |
1013 | if (SDB_TYPE (cs->c_type)) | |
1014 | { | |
1015 | struct symbol *sym; | |
1016 | sym = process_coff_symbol | |
96baa820 | 1017 | (cs, &main_aux, objfile); |
c5aa993b JM |
1018 | SYMBOL_VALUE (sym) = tmpaddr; |
1019 | SYMBOL_SECTION (sym) = sec; | |
1020 | } | |
1021 | } | |
1022 | break; | |
1023 | ||
1024 | case C_FCN: | |
1025 | if (STREQ (cs->c_name, ".bf")) | |
1026 | { | |
1027 | within_function = 1; | |
1028 | ||
1029 | /* value contains address of first non-init type code */ | |
1030 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1031 | contains line number of '{' } */ | |
1032 | if (cs->c_naux != 1) | |
1033 | complain (&bf_no_aux_complaint, cs->c_symnum); | |
1034 | fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1035 | fcn_first_line_addr = cs->c_value; | |
1036 | ||
1037 | /* Might want to check that locals are 0 and | |
1038 | context_stack_depth is zero, and complain if not. */ | |
1039 | ||
1040 | depth = 0; | |
1041 | new = push_context (depth, fcn_start_addr); | |
1042 | fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); | |
1043 | new->name = | |
96baa820 | 1044 | process_coff_symbol (&fcn_cs_saved, &fcn_aux_saved, objfile); |
c5aa993b JM |
1045 | } |
1046 | else if (STREQ (cs->c_name, ".ef")) | |
1047 | { | |
1048 | /* the value of .ef is the address of epilogue code; | |
1049 | not useful for gdb. */ | |
1050 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1051 | contains number of lines to '}' */ | |
1052 | ||
1053 | if (context_stack_depth <= 0) | |
1054 | { /* We attempted to pop an empty context stack */ | |
1055 | complain (&ef_stack_complaint, cs->c_symnum); | |
1056 | within_function = 0; | |
1057 | break; | |
c906108c | 1058 | } |
c5aa993b JM |
1059 | |
1060 | new = pop_context (); | |
1061 | /* Stack must be empty now. */ | |
1062 | if (context_stack_depth > 0 || new == NULL) | |
c906108c | 1063 | { |
c5aa993b JM |
1064 | complain (&ef_complaint, cs->c_symnum); |
1065 | within_function = 0; | |
1066 | break; | |
c906108c | 1067 | } |
c5aa993b JM |
1068 | if (cs->c_naux != 1) |
1069 | { | |
1070 | complain (&ef_no_aux_complaint, cs->c_symnum); | |
1071 | fcn_last_line = 0x7FFFFFFF; | |
1072 | } | |
1073 | else | |
1074 | { | |
1075 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1076 | } | |
1077 | /* fcn_first_line is the line number of the opening '{'. | |
1078 | Do not record it - because it would affect gdb's idea | |
1079 | of the line number of the first statement of the function - | |
1080 | except for one-line functions, for which it is also the line | |
1081 | number of all the statements and of the closing '}', and | |
1082 | for which we do not have any other statement-line-number. */ | |
1083 | if (fcn_last_line == 1) | |
1084 | record_line (current_subfile, fcn_first_line, | |
1085 | fcn_first_line_addr); | |
1086 | else | |
1087 | enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line, | |
d4f3574e | 1088 | objfile); |
c906108c | 1089 | |
c5aa993b JM |
1090 | finish_block (new->name, &local_symbols, new->old_blocks, |
1091 | new->start_addr, | |
c906108c | 1092 | #if defined (FUNCTION_EPILOGUE_SIZE) |
c5aa993b JM |
1093 | /* This macro should be defined only on |
1094 | machines where the | |
1095 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
1096 | field is always zero. | |
1097 | So use the .bf record information that | |
1098 | points to the epilogue and add the size | |
1099 | of the epilogue. */ | |
1100 | cs->c_value | |
1101 | + FUNCTION_EPILOGUE_SIZE | |
b8fbeb18 | 1102 | + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)), |
c906108c | 1103 | #else |
c5aa993b JM |
1104 | fcn_cs_saved.c_value |
1105 | + fcn_aux_saved.x_sym.x_misc.x_fsize | |
b8fbeb18 | 1106 | + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)), |
c906108c | 1107 | #endif |
c5aa993b JM |
1108 | objfile |
1109 | ); | |
1110 | within_function = 0; | |
1111 | } | |
1112 | break; | |
c906108c | 1113 | |
c5aa993b JM |
1114 | case C_BLOCK: |
1115 | if (STREQ (cs->c_name, ".bb")) | |
1116 | { | |
1117 | tmpaddr = cs->c_value; | |
b8fbeb18 | 1118 | tmpaddr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1119 | push_context (++depth, tmpaddr); |
1120 | } | |
1121 | else if (STREQ (cs->c_name, ".eb")) | |
1122 | { | |
1123 | if (context_stack_depth <= 0) | |
1124 | { /* We attempted to pop an empty context stack */ | |
1125 | complain (&eb_stack_complaint, cs->c_symnum); | |
1126 | break; | |
1127 | } | |
c906108c | 1128 | |
c5aa993b JM |
1129 | new = pop_context (); |
1130 | if (depth-- != new->depth) | |
1131 | { | |
1132 | complain (&eb_complaint, symnum); | |
1133 | break; | |
1134 | } | |
1135 | if (local_symbols && context_stack_depth > 0) | |
1136 | { | |
1137 | tmpaddr = | |
b8fbeb18 | 1138 | cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1139 | /* Make a block for the local symbols within. */ |
1140 | finish_block (0, &local_symbols, new->old_blocks, | |
1141 | new->start_addr, tmpaddr, objfile); | |
1142 | } | |
1143 | /* Now pop locals of block just finished. */ | |
1144 | local_symbols = new->locals; | |
1145 | } | |
1146 | break; | |
c906108c | 1147 | |
c5aa993b | 1148 | default: |
96baa820 | 1149 | process_coff_symbol (cs, &main_aux, objfile); |
c5aa993b | 1150 | break; |
c906108c SS |
1151 | } |
1152 | } | |
1153 | ||
1154 | if (last_source_file) | |
1155 | coff_end_symtab (objfile); | |
1156 | ||
1157 | /* Patch up any opaque types (references to types that are not defined | |
1158 | in the file where they are referenced, e.g. "struct foo *bar"). */ | |
1159 | ALL_OBJFILE_SYMTABS (objfile, s) | |
1160 | patch_opaque_types (s); | |
1161 | ||
1162 | current_objfile = NULL; | |
1163 | } | |
1164 | \f | |
1165 | /* Routines for reading headers and symbols from executable. */ | |
1166 | ||
1167 | /* Read the next symbol, swap it, and return it in both internal_syment | |
1168 | form, and coff_symbol form. Also return its first auxent, if any, | |
1169 | in internal_auxent form, and skip any other auxents. */ | |
1170 | ||
1171 | static void | |
1172 | read_one_sym (cs, sym, aux) | |
c5aa993b JM |
1173 | register struct coff_symbol *cs; |
1174 | register struct internal_syment *sym; | |
1175 | register union internal_auxent *aux; | |
c906108c SS |
1176 | { |
1177 | int i; | |
1178 | ||
1179 | cs->c_symnum = symnum; | |
1180 | bfd_read (temp_sym, local_symesz, 1, nlist_bfd_global); | |
c5aa993b | 1181 | bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *) sym); |
c906108c SS |
1182 | cs->c_naux = sym->n_numaux & 0xff; |
1183 | if (cs->c_naux >= 1) | |
1184 | { | |
c906108c | 1185 | bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global); |
c5aa993b JM |
1186 | bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass, |
1187 | 0, cs->c_naux, (char *) aux); | |
1188 | /* If more than one aux entry, read past it (only the first aux | |
1189 | is important). */ | |
1190 | for (i = 1; i < cs->c_naux; i++) | |
1191 | bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global); | |
c906108c SS |
1192 | } |
1193 | cs->c_name = getsymname (sym); | |
1194 | cs->c_value = sym->n_value; | |
1195 | cs->c_sclass = (sym->n_sclass & 0xff); | |
1196 | cs->c_secnum = sym->n_scnum; | |
1197 | cs->c_type = (unsigned) sym->n_type; | |
1198 | if (!SDB_TYPE (cs->c_type)) | |
1199 | cs->c_type = 0; | |
1200 | ||
1201 | #if 0 | |
1202 | if (cs->c_sclass & 128) | |
c5aa993b | 1203 | printf ("thumb symbol %s, class 0x%x\n", cs->c_name, cs->c_sclass); |
c906108c SS |
1204 | #endif |
1205 | ||
1206 | symnum += 1 + cs->c_naux; | |
1207 | ||
1208 | /* The PE file format stores symbol values as offsets within the | |
1209 | section, rather than as absolute addresses. We correct that | |
1210 | here, if the symbol has an appropriate storage class. FIXME: We | |
1211 | should use BFD to read the symbols, rather than duplicating the | |
1212 | work here. */ | |
1213 | if (pe_file) | |
1214 | { | |
1215 | switch (cs->c_sclass) | |
1216 | { | |
1217 | case C_EXT: | |
1218 | case C_THUMBEXT: | |
1219 | case C_THUMBEXTFUNC: | |
1220 | case C_SECTION: | |
1221 | case C_NT_WEAK: | |
1222 | case C_STAT: | |
1223 | case C_THUMBSTAT: | |
1224 | case C_THUMBSTATFUNC: | |
1225 | case C_LABEL: | |
1226 | case C_THUMBLABEL: | |
1227 | case C_BLOCK: | |
1228 | case C_FCN: | |
1229 | case C_EFCN: | |
1230 | if (cs->c_secnum != 0) | |
1231 | cs->c_value += cs_section_address (cs, symfile_bfd); | |
1232 | break; | |
1233 | } | |
1234 | } | |
1235 | } | |
1236 | \f | |
1237 | /* Support for string table handling */ | |
1238 | ||
1239 | static char *stringtab = NULL; | |
1240 | ||
1241 | static int | |
1242 | init_stringtab (abfd, offset) | |
c5aa993b JM |
1243 | bfd *abfd; |
1244 | long offset; | |
c906108c SS |
1245 | { |
1246 | long length; | |
1247 | int val; | |
1248 | unsigned char lengthbuf[4]; | |
1249 | ||
1250 | free_stringtab (); | |
1251 | ||
1252 | /* If the file is stripped, the offset might be zero, indicating no | |
1253 | string table. Just return with `stringtab' set to null. */ | |
1254 | if (offset == 0) | |
1255 | return 0; | |
1256 | ||
1257 | if (bfd_seek (abfd, offset, 0) < 0) | |
1258 | return -1; | |
1259 | ||
c5aa993b | 1260 | val = bfd_read ((char *) lengthbuf, sizeof lengthbuf, 1, abfd); |
c906108c | 1261 | length = bfd_h_get_32 (symfile_bfd, lengthbuf); |
c5aa993b | 1262 | |
c906108c SS |
1263 | /* If no string table is needed, then the file may end immediately |
1264 | after the symbols. Just return with `stringtab' set to null. */ | |
1265 | if (val != sizeof lengthbuf || length < sizeof lengthbuf) | |
1266 | return 0; | |
1267 | ||
1268 | stringtab = (char *) xmalloc (length); | |
1269 | /* This is in target format (probably not very useful, and not currently | |
1270 | used), not host format. */ | |
1271 | memcpy (stringtab, lengthbuf, sizeof lengthbuf); | |
c5aa993b | 1272 | if (length == sizeof length) /* Empty table -- just the count */ |
c906108c SS |
1273 | return 0; |
1274 | ||
1275 | val = bfd_read (stringtab + sizeof lengthbuf, length - sizeof lengthbuf, 1, abfd); | |
1276 | if (val != length - sizeof lengthbuf || stringtab[length - 1] != '\0') | |
1277 | return -1; | |
1278 | ||
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | static void | |
1283 | free_stringtab () | |
1284 | { | |
1285 | if (stringtab) | |
1286 | free (stringtab); | |
1287 | stringtab = NULL; | |
1288 | } | |
1289 | ||
74b7792f AC |
1290 | static void |
1291 | free_stringtab_cleanup (void *ignore) | |
1292 | { | |
1293 | free_stringtab (); | |
1294 | } | |
1295 | ||
c906108c SS |
1296 | static char * |
1297 | getsymname (symbol_entry) | |
c5aa993b | 1298 | struct internal_syment *symbol_entry; |
c906108c | 1299 | { |
c5aa993b | 1300 | static char buffer[SYMNMLEN + 1]; |
c906108c SS |
1301 | char *result; |
1302 | ||
1303 | if (symbol_entry->_n._n_n._n_zeroes == 0) | |
1304 | { | |
1305 | /* FIXME: Probably should be detecting corrupt symbol files by | |
c5aa993b | 1306 | seeing whether offset points to within the stringtab. */ |
c906108c SS |
1307 | result = stringtab + symbol_entry->_n._n_n._n_offset; |
1308 | } | |
1309 | else | |
1310 | { | |
1311 | strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN); | |
1312 | buffer[SYMNMLEN] = '\0'; | |
1313 | result = buffer; | |
1314 | } | |
1315 | return result; | |
1316 | } | |
1317 | ||
1318 | /* Extract the file name from the aux entry of a C_FILE symbol. Return | |
1319 | only the last component of the name. Result is in static storage and | |
1320 | is only good for temporary use. */ | |
1321 | ||
1322 | static char * | |
1323 | coff_getfilename (aux_entry) | |
c5aa993b | 1324 | union internal_auxent *aux_entry; |
c906108c SS |
1325 | { |
1326 | static char buffer[BUFSIZ]; | |
1327 | register char *temp; | |
1328 | char *result; | |
1329 | ||
1330 | if (aux_entry->x_file.x_n.x_zeroes == 0) | |
1331 | strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); | |
1332 | else | |
1333 | { | |
1334 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); | |
1335 | buffer[FILNMLEN] = '\0'; | |
1336 | } | |
1337 | result = buffer; | |
1338 | ||
1339 | /* FIXME: We should not be throwing away the information about what | |
1340 | directory. It should go into dirname of the symtab, or some such | |
1341 | place. */ | |
1342 | if ((temp = strrchr (result, '/')) != NULL) | |
1343 | result = temp + 1; | |
1344 | return (result); | |
1345 | } | |
1346 | \f | |
1347 | /* Support for line number handling. */ | |
1348 | ||
1349 | static char *linetab = NULL; | |
1350 | static long linetab_offset; | |
1351 | static unsigned long linetab_size; | |
1352 | ||
1353 | /* Read in all the line numbers for fast lookups later. Leave them in | |
1354 | external (unswapped) format in memory; we'll swap them as we enter | |
1355 | them into GDB's data structures. */ | |
c5aa993b | 1356 | |
c906108c SS |
1357 | static int |
1358 | init_lineno (abfd, offset, size) | |
c5aa993b JM |
1359 | bfd *abfd; |
1360 | long offset; | |
1361 | int size; | |
c906108c SS |
1362 | { |
1363 | int val; | |
1364 | ||
1365 | linetab_offset = offset; | |
1366 | linetab_size = size; | |
1367 | ||
c5aa993b | 1368 | free_linetab (); |
c906108c SS |
1369 | |
1370 | if (size == 0) | |
1371 | return 0; | |
1372 | ||
1373 | if (bfd_seek (abfd, offset, 0) < 0) | |
1374 | return -1; | |
c5aa993b | 1375 | |
c906108c SS |
1376 | /* Allocate the desired table, plus a sentinel */ |
1377 | linetab = (char *) xmalloc (size + local_linesz); | |
1378 | ||
1379 | val = bfd_read (linetab, size, 1, abfd); | |
1380 | if (val != size) | |
1381 | return -1; | |
1382 | ||
1383 | /* Terminate it with an all-zero sentinel record */ | |
1384 | memset (linetab + size, 0, local_linesz); | |
1385 | ||
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | static void | |
1390 | free_linetab () | |
1391 | { | |
1392 | if (linetab) | |
1393 | free (linetab); | |
1394 | linetab = NULL; | |
1395 | } | |
1396 | ||
74b7792f AC |
1397 | static void |
1398 | free_linetab_cleanup (void *ignore) | |
1399 | { | |
1400 | free_linetab (); | |
1401 | } | |
1402 | ||
c906108c SS |
1403 | #if !defined (L_LNNO32) |
1404 | #define L_LNNO32(lp) ((lp)->l_lnno) | |
1405 | #endif | |
1406 | ||
1407 | static void | |
d4f3574e | 1408 | enter_linenos (file_offset, first_line, last_line, objfile) |
c906108c SS |
1409 | long file_offset; |
1410 | register int first_line; | |
1411 | register int last_line; | |
d4f3574e | 1412 | struct objfile *objfile; |
c906108c SS |
1413 | { |
1414 | register char *rawptr; | |
1415 | struct internal_lineno lptr; | |
1416 | ||
1417 | if (!linetab) | |
c5aa993b | 1418 | return; |
c906108c SS |
1419 | if (file_offset < linetab_offset) |
1420 | { | |
1421 | complain (&lineno_complaint, file_offset); | |
1422 | if (file_offset > linetab_size) /* Too big to be an offset? */ | |
1423 | return; | |
c5aa993b | 1424 | file_offset += linetab_offset; /* Try reading at that linetab offset */ |
c906108c | 1425 | } |
c5aa993b | 1426 | |
c906108c SS |
1427 | rawptr = &linetab[file_offset - linetab_offset]; |
1428 | ||
1429 | /* skip first line entry for each function */ | |
1430 | rawptr += local_linesz; | |
1431 | /* line numbers start at one for the first line of the function */ | |
1432 | first_line--; | |
1433 | ||
c5aa993b JM |
1434 | for (;;) |
1435 | { | |
1436 | bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr); | |
1437 | rawptr += local_linesz; | |
1438 | /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */ | |
1439 | if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line) | |
1440 | record_line (current_subfile, first_line + L_LNNO32 (&lptr), | |
1441 | lptr.l_addr.l_paddr | |
b8fbeb18 | 1442 | + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile))); |
c5aa993b JM |
1443 | else |
1444 | break; | |
1445 | } | |
c906108c SS |
1446 | } |
1447 | \f | |
1448 | static void | |
1449 | patch_type (type, real_type) | |
c5aa993b JM |
1450 | struct type *type; |
1451 | struct type *real_type; | |
c906108c SS |
1452 | { |
1453 | register struct type *target = TYPE_TARGET_TYPE (type); | |
1454 | register struct type *real_target = TYPE_TARGET_TYPE (real_type); | |
1455 | int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); | |
1456 | ||
1457 | TYPE_LENGTH (target) = TYPE_LENGTH (real_target); | |
1458 | TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); | |
1459 | TYPE_FIELDS (target) = (struct field *) TYPE_ALLOC (target, field_size); | |
1460 | ||
1461 | memcpy (TYPE_FIELDS (target), TYPE_FIELDS (real_target), field_size); | |
1462 | ||
1463 | if (TYPE_NAME (real_target)) | |
1464 | { | |
1465 | if (TYPE_NAME (target)) | |
1466 | free (TYPE_NAME (target)); | |
1467 | TYPE_NAME (target) = concat (TYPE_NAME (real_target), NULL); | |
1468 | } | |
1469 | } | |
1470 | ||
1471 | /* Patch up all appropriate typedef symbols in the opaque_type_chains | |
1472 | so that they can be used to print out opaque data structures properly. */ | |
1473 | ||
1474 | static void | |
1475 | patch_opaque_types (s) | |
1476 | struct symtab *s; | |
1477 | { | |
1478 | register struct block *b; | |
1479 | register int i; | |
1480 | register struct symbol *real_sym; | |
c5aa993b | 1481 | |
c906108c SS |
1482 | /* Go through the per-file symbols only */ |
1483 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); | |
1484 | for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--) | |
1485 | { | |
1486 | /* Find completed typedefs to use to fix opaque ones. | |
c5aa993b JM |
1487 | Remove syms from the chain when their types are stored, |
1488 | but search the whole chain, as there may be several syms | |
1489 | from different files with the same name. */ | |
c906108c SS |
1490 | real_sym = BLOCK_SYM (b, i); |
1491 | if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF && | |
1492 | SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE && | |
1493 | TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR && | |
1494 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) | |
1495 | { | |
1496 | register char *name = SYMBOL_NAME (real_sym); | |
1497 | register int hash = hashname (name); | |
1498 | register struct symbol *sym, *prev; | |
c5aa993b | 1499 | |
c906108c SS |
1500 | prev = 0; |
1501 | for (sym = opaque_type_chain[hash]; sym;) | |
1502 | { | |
1503 | if (name[0] == SYMBOL_NAME (sym)[0] && | |
1504 | STREQ (name + 1, SYMBOL_NAME (sym) + 1)) | |
1505 | { | |
1506 | if (prev) | |
1507 | { | |
1508 | SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); | |
1509 | } | |
1510 | else | |
1511 | { | |
1512 | opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); | |
1513 | } | |
c5aa993b | 1514 | |
c906108c | 1515 | patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); |
c5aa993b | 1516 | |
c906108c SS |
1517 | if (prev) |
1518 | { | |
1519 | sym = SYMBOL_VALUE_CHAIN (prev); | |
1520 | } | |
1521 | else | |
1522 | { | |
1523 | sym = opaque_type_chain[hash]; | |
1524 | } | |
1525 | } | |
1526 | else | |
1527 | { | |
1528 | prev = sym; | |
1529 | sym = SYMBOL_VALUE_CHAIN (sym); | |
1530 | } | |
1531 | } | |
1532 | } | |
1533 | } | |
1534 | } | |
1535 | \f | |
1536 | static struct symbol * | |
96baa820 | 1537 | process_coff_symbol (cs, aux, objfile) |
c906108c SS |
1538 | register struct coff_symbol *cs; |
1539 | register union internal_auxent *aux; | |
c906108c SS |
1540 | struct objfile *objfile; |
1541 | { | |
1542 | register struct symbol *sym | |
c5aa993b JM |
1543 | = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
1544 | sizeof (struct symbol)); | |
c906108c SS |
1545 | char *name; |
1546 | ||
1547 | memset (sym, 0, sizeof (struct symbol)); | |
1548 | name = cs->c_name; | |
1549 | name = EXTERNAL_NAME (name, objfile->obfd); | |
1550 | SYMBOL_NAME (sym) = obsavestring (name, strlen (name), | |
1551 | &objfile->symbol_obstack); | |
1552 | SYMBOL_LANGUAGE (sym) = language_auto; | |
1553 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); | |
1554 | ||
1555 | /* default assumptions */ | |
1556 | SYMBOL_VALUE (sym) = cs->c_value; | |
1557 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1558 | SYMBOL_SECTION (sym) = cs_to_section (cs, objfile); | |
1559 | ||
1560 | if (ISFCN (cs->c_type)) | |
1561 | { | |
b8fbeb18 | 1562 | SYMBOL_VALUE (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1563 | SYMBOL_TYPE (sym) = |
1564 | lookup_function_type (decode_function_type (cs, cs->c_type, aux)); | |
c906108c SS |
1565 | |
1566 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
1567 | if (cs->c_sclass == C_STAT || cs->c_sclass == C_THUMBSTAT | |
1568 | || cs->c_sclass == C_THUMBSTATFUNC) | |
1569 | add_symbol_to_list (sym, &file_symbols); | |
1570 | else if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT | |
1571 | || cs->c_sclass == C_THUMBEXTFUNC) | |
1572 | add_symbol_to_list (sym, &global_symbols); | |
1573 | } | |
1574 | else | |
1575 | { | |
1576 | SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux); | |
1577 | switch (cs->c_sclass) | |
1578 | { | |
c5aa993b JM |
1579 | case C_NULL: |
1580 | break; | |
c906108c | 1581 | |
c5aa993b JM |
1582 | case C_AUTO: |
1583 | SYMBOL_CLASS (sym) = LOC_LOCAL; | |
1584 | add_symbol_to_list (sym, &local_symbols); | |
1585 | break; | |
c906108c | 1586 | |
c5aa993b JM |
1587 | case C_THUMBEXT: |
1588 | case C_THUMBEXTFUNC: | |
1589 | case C_EXT: | |
1590 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1591 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
b8fbeb18 | 1592 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1593 | add_symbol_to_list (sym, &global_symbols); |
1594 | break; | |
c906108c | 1595 | |
c5aa993b JM |
1596 | case C_THUMBSTAT: |
1597 | case C_THUMBSTATFUNC: | |
1598 | case C_STAT: | |
1599 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1600 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
b8fbeb18 | 1601 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1602 | if (within_function) |
1603 | { | |
c906108c SS |
1604 | /* Static symbol of local scope */ |
1605 | add_symbol_to_list (sym, &local_symbols); | |
1606 | } | |
c5aa993b JM |
1607 | else |
1608 | { | |
c906108c SS |
1609 | /* Static symbol at top level of file */ |
1610 | add_symbol_to_list (sym, &file_symbols); | |
1611 | } | |
c5aa993b | 1612 | break; |
c906108c SS |
1613 | |
1614 | #ifdef C_GLBLREG /* AMD coff */ | |
c5aa993b | 1615 | case C_GLBLREG: |
c906108c | 1616 | #endif |
c5aa993b JM |
1617 | case C_REG: |
1618 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
1619 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM (cs->c_value); | |
1620 | add_symbol_to_list (sym, &local_symbols); | |
1621 | break; | |
c906108c | 1622 | |
c5aa993b JM |
1623 | case C_THUMBLABEL: |
1624 | case C_LABEL: | |
1625 | break; | |
c906108c | 1626 | |
c5aa993b JM |
1627 | case C_ARG: |
1628 | SYMBOL_CLASS (sym) = LOC_ARG; | |
1629 | add_symbol_to_list (sym, &local_symbols); | |
c906108c | 1630 | #if !defined (BELIEVE_PCC_PROMOTION) |
c5aa993b JM |
1631 | if (TARGET_BYTE_ORDER == BIG_ENDIAN) |
1632 | { | |
1633 | /* If PCC says a parameter is a short or a char, | |
1634 | aligned on an int boundary, realign it to the | |
1635 | "little end" of the int. */ | |
1636 | struct type *temptype; | |
1637 | temptype = lookup_fundamental_type (current_objfile, | |
1638 | FT_INTEGER); | |
1639 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) | |
1640 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT | |
1641 | && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (temptype)) | |
1642 | { | |
1643 | SYMBOL_VALUE (sym) += | |
1644 | TYPE_LENGTH (temptype) | |
1645 | - TYPE_LENGTH (SYMBOL_TYPE (sym)); | |
1646 | } | |
1647 | } | |
c906108c | 1648 | #endif |
c5aa993b | 1649 | break; |
c906108c | 1650 | |
c5aa993b JM |
1651 | case C_REGPARM: |
1652 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
1653 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM (cs->c_value); | |
1654 | add_symbol_to_list (sym, &local_symbols); | |
c906108c | 1655 | #if !defined (BELIEVE_PCC_PROMOTION) |
c5aa993b JM |
1656 | /* FIXME: This should retain the current type, since it's just |
1657 | a register value. gnu@adobe, 26Feb93 */ | |
1658 | { | |
1659 | /* If PCC says a parameter is a short or a char, | |
1660 | it is really an int. */ | |
1661 | struct type *temptype; | |
1662 | temptype = | |
1663 | lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1664 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) | |
1665 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT) | |
c906108c | 1666 | { |
c5aa993b JM |
1667 | SYMBOL_TYPE (sym) = |
1668 | (TYPE_UNSIGNED (SYMBOL_TYPE (sym)) | |
1669 | ? lookup_fundamental_type (current_objfile, | |
1670 | FT_UNSIGNED_INTEGER) | |
1671 | : temptype); | |
c906108c | 1672 | } |
c5aa993b | 1673 | } |
c906108c | 1674 | #endif |
c5aa993b | 1675 | break; |
c906108c | 1676 | |
c5aa993b JM |
1677 | case C_TPDEF: |
1678 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1679 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1680 | ||
1681 | /* If type has no name, give it one */ | |
1682 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
1683 | { | |
1684 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR | |
1685 | || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC) | |
1686 | { | |
1687 | /* If we are giving a name to a type such as "pointer to | |
1688 | foo" or "function returning foo", we better not set | |
1689 | the TYPE_NAME. If the program contains "typedef char | |
1690 | *caddr_t;", we don't want all variables of type char | |
1691 | * to print as caddr_t. This is not just a | |
1692 | consequence of GDB's type management; CC and GCC (at | |
1693 | least through version 2.4) both output variables of | |
1694 | either type char * or caddr_t with the type | |
1695 | refering to the C_TPDEF symbol for caddr_t. If a future | |
1696 | compiler cleans this up it GDB is not ready for it | |
1697 | yet, but if it becomes ready we somehow need to | |
1698 | disable this check (without breaking the PCC/GCC2.4 | |
1699 | case). | |
1700 | ||
1701 | Sigh. | |
1702 | ||
1703 | Fortunately, this check seems not to be necessary | |
1704 | for anything except pointers or functions. */ | |
1705 | ; | |
1706 | } | |
1707 | else | |
1708 | TYPE_NAME (SYMBOL_TYPE (sym)) = | |
1709 | concat (SYMBOL_NAME (sym), NULL); | |
1710 | } | |
c906108c | 1711 | #ifdef CXUX_TARGET |
c5aa993b JM |
1712 | /* Ignore vendor section for Harris CX/UX targets. */ |
1713 | else if (cs->c_name[0] == '$') | |
1714 | break; | |
c906108c SS |
1715 | #endif /* CXUX_TARGET */ |
1716 | ||
c5aa993b JM |
1717 | /* Keep track of any type which points to empty structured type, |
1718 | so it can be filled from a definition from another file. A | |
1719 | simple forward reference (TYPE_CODE_UNDEF) is not an | |
1720 | empty structured type, though; the forward references | |
1721 | work themselves out via the magic of coff_lookup_type. */ | |
1722 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && | |
1723 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0 && | |
1724 | TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) != | |
1725 | TYPE_CODE_UNDEF) | |
1726 | { | |
1727 | register int i = hashname (SYMBOL_NAME (sym)); | |
c906108c | 1728 | |
c5aa993b JM |
1729 | SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; |
1730 | opaque_type_chain[i] = sym; | |
1731 | } | |
1732 | add_symbol_to_list (sym, &file_symbols); | |
1733 | break; | |
c906108c | 1734 | |
c5aa993b JM |
1735 | case C_STRTAG: |
1736 | case C_UNTAG: | |
1737 | case C_ENTAG: | |
1738 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1739 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
1740 | ||
1741 | /* Some compilers try to be helpful by inventing "fake" | |
1742 | names for anonymous enums, structures, and unions, like | |
1743 | "~0fake" or ".0fake". Thanks, but no thanks... */ | |
1744 | if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0) | |
1745 | if (SYMBOL_NAME (sym) != NULL | |
1746 | && *SYMBOL_NAME (sym) != '~' | |
1747 | && *SYMBOL_NAME (sym) != '.') | |
1748 | TYPE_TAG_NAME (SYMBOL_TYPE (sym)) = | |
1749 | concat (SYMBOL_NAME (sym), NULL); | |
1750 | ||
1751 | add_symbol_to_list (sym, &file_symbols); | |
1752 | break; | |
c906108c | 1753 | |
c5aa993b JM |
1754 | default: |
1755 | break; | |
c906108c SS |
1756 | } |
1757 | } | |
1758 | return sym; | |
1759 | } | |
1760 | \f | |
1761 | /* Decode a coff type specifier; return the type that is meant. */ | |
1762 | ||
1763 | static struct type * | |
1764 | decode_type (cs, c_type, aux) | |
1765 | register struct coff_symbol *cs; | |
1766 | unsigned int c_type; | |
1767 | register union internal_auxent *aux; | |
1768 | { | |
1769 | register struct type *type = 0; | |
1770 | unsigned int new_c_type; | |
1771 | ||
1772 | if (c_type & ~N_BTMASK) | |
1773 | { | |
1774 | new_c_type = DECREF (c_type); | |
1775 | if (ISPTR (c_type)) | |
1776 | { | |
1777 | type = decode_type (cs, new_c_type, aux); | |
1778 | type = lookup_pointer_type (type); | |
1779 | } | |
1780 | else if (ISFCN (c_type)) | |
1781 | { | |
1782 | type = decode_type (cs, new_c_type, aux); | |
1783 | type = lookup_function_type (type); | |
1784 | } | |
1785 | else if (ISARY (c_type)) | |
1786 | { | |
1787 | int i, n; | |
1788 | register unsigned short *dim; | |
1789 | struct type *base_type, *index_type, *range_type; | |
1790 | ||
1791 | /* Define an array type. */ | |
1792 | /* auxent refers to array, not base type */ | |
1793 | if (aux->x_sym.x_tagndx.l == 0) | |
1794 | cs->c_naux = 0; | |
1795 | ||
1796 | /* shift the indices down */ | |
1797 | dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; | |
1798 | i = 1; | |
1799 | n = dim[0]; | |
1800 | for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) | |
1801 | *dim = *(dim + 1); | |
1802 | *dim = 0; | |
1803 | ||
1804 | base_type = decode_type (cs, new_c_type, aux); | |
1805 | index_type = lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1806 | range_type = | |
1807 | create_range_type ((struct type *) NULL, index_type, 0, n - 1); | |
1808 | type = | |
1809 | create_array_type ((struct type *) NULL, base_type, range_type); | |
1810 | } | |
1811 | return type; | |
1812 | } | |
1813 | ||
1814 | /* Reference to existing type. This only occurs with the | |
1815 | struct, union, and enum types. EPI a29k coff | |
1816 | fakes us out by producing aux entries with a nonzero | |
1817 | x_tagndx for definitions of structs, unions, and enums, so we | |
1818 | have to check the c_sclass field. SCO 3.2v4 cc gets confused | |
1819 | with pointers to pointers to defined structs, and generates | |
1820 | negative x_tagndx fields. */ | |
1821 | if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0) | |
1822 | { | |
1823 | if (cs->c_sclass != C_STRTAG | |
1824 | && cs->c_sclass != C_UNTAG | |
1825 | && cs->c_sclass != C_ENTAG | |
1826 | && aux->x_sym.x_tagndx.l >= 0) | |
1827 | { | |
1828 | type = coff_alloc_type (aux->x_sym.x_tagndx.l); | |
1829 | return type; | |
1830 | } | |
1831 | else | |
1832 | { | |
1833 | complain (&tagndx_bad_complaint, cs->c_name); | |
1834 | /* And fall through to decode_base_type... */ | |
1835 | } | |
1836 | } | |
1837 | ||
1838 | return decode_base_type (cs, BTYPE (c_type), aux); | |
1839 | } | |
1840 | ||
1841 | /* Decode a coff type specifier for function definition; | |
1842 | return the type that the function returns. */ | |
1843 | ||
1844 | static struct type * | |
1845 | decode_function_type (cs, c_type, aux) | |
1846 | register struct coff_symbol *cs; | |
1847 | unsigned int c_type; | |
1848 | register union internal_auxent *aux; | |
1849 | { | |
1850 | if (aux->x_sym.x_tagndx.l == 0) | |
c5aa993b | 1851 | cs->c_naux = 0; /* auxent refers to function, not base type */ |
c906108c SS |
1852 | |
1853 | return decode_type (cs, DECREF (c_type), aux); | |
1854 | } | |
1855 | \f | |
1856 | /* basic C types */ | |
1857 | ||
1858 | static struct type * | |
1859 | decode_base_type (cs, c_type, aux) | |
1860 | register struct coff_symbol *cs; | |
1861 | unsigned int c_type; | |
1862 | register union internal_auxent *aux; | |
1863 | { | |
1864 | struct type *type; | |
1865 | ||
1866 | switch (c_type) | |
1867 | { | |
c5aa993b JM |
1868 | case T_NULL: |
1869 | /* shows up with "void (*foo)();" structure members */ | |
1870 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
c906108c SS |
1871 | |
1872 | #if 0 | |
1873 | /* DGUX actually defines both T_ARG and T_VOID to the same value. */ | |
1874 | #ifdef T_ARG | |
c5aa993b JM |
1875 | case T_ARG: |
1876 | /* Shows up in DGUX, I think. Not sure where. */ | |
1877 | return lookup_fundamental_type (current_objfile, FT_VOID); /* shouldn't show up here */ | |
c906108c SS |
1878 | #endif |
1879 | #endif /* 0 */ | |
1880 | ||
1881 | #ifdef T_VOID | |
c5aa993b JM |
1882 | case T_VOID: |
1883 | /* Intel 960 COFF has this symbol and meaning. */ | |
1884 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
c906108c SS |
1885 | #endif |
1886 | ||
c5aa993b JM |
1887 | case T_CHAR: |
1888 | return lookup_fundamental_type (current_objfile, FT_CHAR); | |
c906108c | 1889 | |
c5aa993b JM |
1890 | case T_SHORT: |
1891 | return lookup_fundamental_type (current_objfile, FT_SHORT); | |
c906108c | 1892 | |
c5aa993b JM |
1893 | case T_INT: |
1894 | return lookup_fundamental_type (current_objfile, FT_INTEGER); | |
c906108c | 1895 | |
c5aa993b JM |
1896 | case T_LONG: |
1897 | if (cs->c_sclass == C_FIELD | |
1898 | && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) | |
1899 | return lookup_fundamental_type (current_objfile, FT_LONG_LONG); | |
1900 | else | |
1901 | return lookup_fundamental_type (current_objfile, FT_LONG); | |
c906108c | 1902 | |
c5aa993b JM |
1903 | case T_FLOAT: |
1904 | return lookup_fundamental_type (current_objfile, FT_FLOAT); | |
c906108c | 1905 | |
c5aa993b JM |
1906 | case T_DOUBLE: |
1907 | return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); | |
c906108c | 1908 | |
c5aa993b JM |
1909 | case T_LNGDBL: |
1910 | return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); | |
c906108c | 1911 | |
c5aa993b JM |
1912 | case T_STRUCT: |
1913 | if (cs->c_naux != 1) | |
1914 | { | |
1915 | /* anonymous structure type */ | |
1916 | type = coff_alloc_type (cs->c_symnum); | |
1917 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1918 | TYPE_NAME (type) = NULL; | |
1919 | /* This used to set the tag to "<opaque>". But I think setting it | |
1920 | to NULL is right, and the printing code can print it as | |
1921 | "struct {...}". */ | |
1922 | TYPE_TAG_NAME (type) = NULL; | |
1923 | INIT_CPLUS_SPECIFIC (type); | |
1924 | TYPE_LENGTH (type) = 0; | |
1925 | TYPE_FIELDS (type) = 0; | |
1926 | TYPE_NFIELDS (type) = 0; | |
1927 | } | |
1928 | else | |
1929 | { | |
1930 | type = coff_read_struct_type (cs->c_symnum, | |
1931 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1932 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
1933 | } | |
1934 | return type; | |
c906108c | 1935 | |
c5aa993b JM |
1936 | case T_UNION: |
1937 | if (cs->c_naux != 1) | |
1938 | { | |
1939 | /* anonymous union type */ | |
1940 | type = coff_alloc_type (cs->c_symnum); | |
1941 | TYPE_NAME (type) = NULL; | |
1942 | /* This used to set the tag to "<opaque>". But I think setting it | |
1943 | to NULL is right, and the printing code can print it as | |
1944 | "union {...}". */ | |
1945 | TYPE_TAG_NAME (type) = NULL; | |
1946 | INIT_CPLUS_SPECIFIC (type); | |
1947 | TYPE_LENGTH (type) = 0; | |
1948 | TYPE_FIELDS (type) = 0; | |
1949 | TYPE_NFIELDS (type) = 0; | |
1950 | } | |
1951 | else | |
1952 | { | |
1953 | type = coff_read_struct_type (cs->c_symnum, | |
c906108c | 1954 | aux->x_sym.x_misc.x_lnsz.x_size, |
c5aa993b JM |
1955 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); |
1956 | } | |
1957 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1958 | return type; | |
c906108c | 1959 | |
c5aa993b JM |
1960 | case T_ENUM: |
1961 | if (cs->c_naux != 1) | |
1962 | { | |
1963 | /* anonymous enum type */ | |
1964 | type = coff_alloc_type (cs->c_symnum); | |
1965 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
1966 | TYPE_NAME (type) = NULL; | |
1967 | /* This used to set the tag to "<opaque>". But I think setting it | |
1968 | to NULL is right, and the printing code can print it as | |
1969 | "enum {...}". */ | |
1970 | TYPE_TAG_NAME (type) = NULL; | |
1971 | TYPE_LENGTH (type) = 0; | |
1972 | TYPE_FIELDS (type) = 0; | |
1973 | TYPE_NFIELDS (type) = 0; | |
1974 | } | |
1975 | else | |
1976 | { | |
1977 | type = coff_read_enum_type (cs->c_symnum, | |
1978 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1979 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
1980 | } | |
1981 | return type; | |
1982 | ||
1983 | case T_MOE: | |
1984 | /* shouldn't show up here */ | |
1985 | break; | |
c906108c | 1986 | |
c5aa993b JM |
1987 | case T_UCHAR: |
1988 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); | |
c906108c | 1989 | |
c5aa993b JM |
1990 | case T_USHORT: |
1991 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); | |
c906108c | 1992 | |
c5aa993b JM |
1993 | case T_UINT: |
1994 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); | |
c906108c | 1995 | |
c5aa993b JM |
1996 | case T_ULONG: |
1997 | if (cs->c_sclass == C_FIELD | |
1998 | && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) | |
1999 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); | |
2000 | else | |
2001 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG); | |
c906108c SS |
2002 | } |
2003 | complain (&unexpected_type_complaint, cs->c_name); | |
2004 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
2005 | } | |
2006 | \f | |
2007 | /* This page contains subroutines of read_type. */ | |
2008 | ||
2009 | /* Read the description of a structure (or union type) and return an | |
2010 | object describing the type. */ | |
2011 | ||
2012 | static struct type * | |
2013 | coff_read_struct_type (index, length, lastsym) | |
2014 | int index; | |
2015 | int length; | |
2016 | int lastsym; | |
2017 | { | |
2018 | struct nextfield | |
2019 | { | |
2020 | struct nextfield *next; | |
2021 | struct field field; | |
2022 | }; | |
2023 | ||
2024 | register struct type *type; | |
2025 | register struct nextfield *list = 0; | |
2026 | struct nextfield *new; | |
2027 | int nfields = 0; | |
2028 | register int n; | |
2029 | char *name; | |
2030 | struct coff_symbol member_sym; | |
2031 | register struct coff_symbol *ms = &member_sym; | |
2032 | struct internal_syment sub_sym; | |
2033 | union internal_auxent sub_aux; | |
2034 | int done = 0; | |
2035 | ||
2036 | type = coff_alloc_type (index); | |
2037 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
c5aa993b | 2038 | INIT_CPLUS_SPECIFIC (type); |
c906108c SS |
2039 | TYPE_LENGTH (type) = length; |
2040 | ||
2041 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
2042 | { | |
2043 | read_one_sym (ms, &sub_sym, &sub_aux); | |
2044 | name = ms->c_name; | |
2045 | name = EXTERNAL_NAME (name, current_objfile->obfd); | |
2046 | ||
2047 | switch (ms->c_sclass) | |
2048 | { | |
c5aa993b JM |
2049 | case C_MOS: |
2050 | case C_MOU: | |
2051 | ||
2052 | /* Get space to record the next field's data. */ | |
2053 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
2054 | new->next = list; | |
2055 | list = new; | |
2056 | ||
2057 | /* Save the data. */ | |
2058 | list->field.name = | |
2059 | obsavestring (name, | |
2060 | strlen (name), | |
2061 | ¤t_objfile->symbol_obstack); | |
2062 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); | |
2063 | FIELD_BITPOS (list->field) = 8 * ms->c_value; | |
2064 | FIELD_BITSIZE (list->field) = 0; | |
2065 | nfields++; | |
2066 | break; | |
c906108c | 2067 | |
c5aa993b JM |
2068 | case C_FIELD: |
2069 | ||
2070 | /* Get space to record the next field's data. */ | |
2071 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
2072 | new->next = list; | |
2073 | list = new; | |
2074 | ||
2075 | /* Save the data. */ | |
2076 | list->field.name = | |
2077 | obsavestring (name, | |
2078 | strlen (name), | |
2079 | ¤t_objfile->symbol_obstack); | |
2080 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); | |
2081 | FIELD_BITPOS (list->field) = ms->c_value; | |
2082 | FIELD_BITSIZE (list->field) = sub_aux.x_sym.x_misc.x_lnsz.x_size; | |
2083 | nfields++; | |
2084 | break; | |
c906108c | 2085 | |
c5aa993b JM |
2086 | case C_EOS: |
2087 | done = 1; | |
2088 | break; | |
c906108c SS |
2089 | } |
2090 | } | |
2091 | /* Now create the vector of fields, and record how big it is. */ | |
2092 | ||
2093 | TYPE_NFIELDS (type) = nfields; | |
2094 | TYPE_FIELDS (type) = (struct field *) | |
2095 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
2096 | ||
2097 | /* Copy the saved-up fields into the field vector. */ | |
2098 | ||
2099 | for (n = nfields; list; list = list->next) | |
2100 | TYPE_FIELD (type, --n) = list->field; | |
2101 | ||
2102 | return type; | |
2103 | } | |
2104 | \f | |
2105 | /* Read a definition of an enumeration type, | |
2106 | and create and return a suitable type object. | |
2107 | Also defines the symbols that represent the values of the type. */ | |
2108 | ||
2109 | /* ARGSUSED */ | |
2110 | static struct type * | |
2111 | coff_read_enum_type (index, length, lastsym) | |
2112 | int index; | |
2113 | int length; | |
2114 | int lastsym; | |
2115 | { | |
2116 | register struct symbol *sym; | |
2117 | register struct type *type; | |
2118 | int nsyms = 0; | |
2119 | int done = 0; | |
2120 | struct pending **symlist; | |
2121 | struct coff_symbol member_sym; | |
2122 | register struct coff_symbol *ms = &member_sym; | |
2123 | struct internal_syment sub_sym; | |
2124 | union internal_auxent sub_aux; | |
2125 | struct pending *osyms, *syms; | |
2126 | int o_nsyms; | |
2127 | register int n; | |
2128 | char *name; | |
2129 | int unsigned_enum = 1; | |
2130 | ||
2131 | type = coff_alloc_type (index); | |
2132 | if (within_function) | |
2133 | symlist = &local_symbols; | |
2134 | else | |
2135 | symlist = &file_symbols; | |
2136 | osyms = *symlist; | |
2137 | o_nsyms = osyms ? osyms->nsyms : 0; | |
2138 | ||
2139 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
2140 | { | |
2141 | read_one_sym (ms, &sub_sym, &sub_aux); | |
2142 | name = ms->c_name; | |
2143 | name = EXTERNAL_NAME (name, current_objfile->obfd); | |
2144 | ||
2145 | switch (ms->c_sclass) | |
2146 | { | |
c5aa993b JM |
2147 | case C_MOE: |
2148 | sym = (struct symbol *) obstack_alloc | |
2149 | (¤t_objfile->symbol_obstack, | |
2150 | sizeof (struct symbol)); | |
2151 | memset (sym, 0, sizeof (struct symbol)); | |
2152 | ||
2153 | SYMBOL_NAME (sym) = | |
2154 | obsavestring (name, strlen (name), | |
2155 | ¤t_objfile->symbol_obstack); | |
2156 | SYMBOL_CLASS (sym) = LOC_CONST; | |
2157 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2158 | SYMBOL_VALUE (sym) = ms->c_value; | |
2159 | add_symbol_to_list (sym, symlist); | |
2160 | nsyms++; | |
2161 | break; | |
c906108c | 2162 | |
c5aa993b JM |
2163 | case C_EOS: |
2164 | /* Sometimes the linker (on 386/ix 2.0.2 at least) screws | |
2165 | up the count of how many symbols to read. So stop | |
2166 | on .eos. */ | |
2167 | done = 1; | |
2168 | break; | |
c906108c SS |
2169 | } |
2170 | } | |
2171 | ||
2172 | /* Now fill in the fields of the type-structure. */ | |
2173 | ||
2174 | if (length > 0) | |
2175 | TYPE_LENGTH (type) = length; | |
2176 | else | |
c5aa993b | 2177 | TYPE_LENGTH (type) = TARGET_INT_BIT / TARGET_CHAR_BIT; /* Assume ints */ |
c906108c SS |
2178 | TYPE_CODE (type) = TYPE_CODE_ENUM; |
2179 | TYPE_NFIELDS (type) = nsyms; | |
2180 | TYPE_FIELDS (type) = (struct field *) | |
2181 | TYPE_ALLOC (type, sizeof (struct field) * nsyms); | |
2182 | ||
2183 | /* Find the symbols for the values and put them into the type. | |
2184 | The symbols can be found in the symlist that we put them on | |
2185 | to cause them to be defined. osyms contains the old value | |
2186 | of that symlist; everything up to there was defined by us. */ | |
2187 | /* Note that we preserve the order of the enum constants, so | |
2188 | that in something like "enum {FOO, LAST_THING=FOO}" we print | |
2189 | FOO, not LAST_THING. */ | |
2190 | ||
2191 | for (syms = *symlist, n = 0; syms; syms = syms->next) | |
2192 | { | |
2193 | int j = 0; | |
2194 | ||
2195 | if (syms == osyms) | |
2196 | j = o_nsyms; | |
c5aa993b | 2197 | for (; j < syms->nsyms; j++, n++) |
c906108c SS |
2198 | { |
2199 | struct symbol *xsym = syms->symbol[j]; | |
2200 | SYMBOL_TYPE (xsym) = type; | |
2201 | TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym); | |
2202 | TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym); | |
2203 | if (SYMBOL_VALUE (xsym) < 0) | |
2204 | unsigned_enum = 0; | |
2205 | TYPE_FIELD_BITSIZE (type, n) = 0; | |
2206 | } | |
2207 | if (syms == osyms) | |
2208 | break; | |
2209 | } | |
2210 | ||
2211 | if (unsigned_enum) | |
2212 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; | |
2213 | ||
2214 | return type; | |
2215 | } | |
2216 | ||
2217 | /* Register our ability to parse symbols for coff BFD files. */ | |
2218 | ||
2219 | static struct sym_fns coff_sym_fns = | |
2220 | { | |
2221 | bfd_target_coff_flavour, | |
c5aa993b JM |
2222 | coff_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
2223 | coff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
2224 | coff_symfile_read, /* sym_read: read a symbol file into symtab */ | |
2225 | coff_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
96baa820 | 2226 | default_symfile_offsets, /* sym_offsets: xlate external to internal form */ |
c5aa993b | 2227 | NULL /* next: pointer to next struct sym_fns */ |
c906108c SS |
2228 | }; |
2229 | ||
2230 | void | |
2231 | _initialize_coffread () | |
2232 | { | |
2233 | add_symtab_fns (&coff_sym_fns); | |
2234 | } |