Commit | Line | Data |
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c906108c | 1 | /* Read coff symbol tables and convert to internal format, for GDB. |
b6ba6518 KB |
2 | Copyright 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, |
3 | 1997, 1998, 1999, 2000 | |
c5aa993b | 4 | Free Software Foundation, Inc. |
c906108c SS |
5 | Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu). |
6 | ||
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b JM |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "symtab.h" | |
26 | #include "gdbtypes.h" | |
27 | #include "demangle.h" | |
28 | #include "breakpoint.h" | |
29 | ||
30 | #include "bfd.h" | |
31 | #include "obstack.h" | |
32 | ||
33 | #include "gdb_string.h" | |
34 | #include <ctype.h> | |
35 | ||
36 | #include "coff/internal.h" /* Internal format of COFF symbols in BFD */ | |
37 | #include "libcoff.h" /* FIXME secret internal data from BFD */ | |
38 | ||
39 | #include "symfile.h" | |
40 | #include "objfiles.h" | |
41 | #include "buildsym.h" | |
42 | #include "gdb-stabs.h" | |
43 | #include "stabsread.h" | |
44 | #include "complaints.h" | |
45 | #include "target.h" | |
6ec4c4bd | 46 | #include "gdb_assert.h" |
c906108c | 47 | |
a14ed312 | 48 | extern void _initialize_coffread (void); |
392a587b | 49 | |
c5aa993b JM |
50 | struct coff_symfile_info |
51 | { | |
52 | file_ptr min_lineno_offset; /* Where in file lowest line#s are */ | |
53 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ | |
c906108c | 54 | |
c5aa993b JM |
55 | CORE_ADDR textaddr; /* Addr of .text section. */ |
56 | unsigned int textsize; /* Size of .text section. */ | |
57 | struct stab_section_list *stabsects; /* .stab sections. */ | |
58 | asection *stabstrsect; /* Section pointer for .stab section */ | |
59 | char *stabstrdata; | |
60 | }; | |
c906108c SS |
61 | |
62 | /* Translate an external name string into a user-visible name. */ | |
63 | #define EXTERNAL_NAME(string, abfd) \ | |
64 | (string[0] == bfd_get_symbol_leading_char(abfd)? string+1: string) | |
65 | ||
66 | /* To be an sdb debug type, type must have at least a basic or primary | |
67 | derived type. Using this rather than checking against T_NULL is | |
68 | said to prevent core dumps if we try to operate on Michael Bloom | |
69 | dbx-in-coff file. */ | |
70 | ||
71 | #define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK)) | |
72 | ||
c906108c SS |
73 | /* Core address of start and end of text of current source file. |
74 | This comes from a ".text" symbol where x_nlinno > 0. */ | |
75 | ||
76 | static CORE_ADDR current_source_start_addr; | |
77 | static CORE_ADDR current_source_end_addr; | |
78 | ||
79 | /* The addresses of the symbol table stream and number of symbols | |
80 | of the object file we are reading (as copied into core). */ | |
81 | ||
82 | static bfd *nlist_bfd_global; | |
83 | static int nlist_nsyms_global; | |
84 | ||
c906108c SS |
85 | |
86 | /* Pointers to scratch storage, used for reading raw symbols and auxents. */ | |
87 | ||
88 | static char *temp_sym; | |
89 | static char *temp_aux; | |
90 | ||
91 | /* Local variables that hold the shift and mask values for the | |
92 | COFF file that we are currently reading. These come back to us | |
93 | from BFD, and are referenced by their macro names, as well as | |
94 | internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF | |
95 | macros from include/coff/internal.h . */ | |
96 | ||
c5aa993b JM |
97 | static unsigned local_n_btmask; |
98 | static unsigned local_n_btshft; | |
99 | static unsigned local_n_tmask; | |
100 | static unsigned local_n_tshift; | |
c906108c SS |
101 | |
102 | #define N_BTMASK local_n_btmask | |
103 | #define N_BTSHFT local_n_btshft | |
104 | #define N_TMASK local_n_tmask | |
105 | #define N_TSHIFT local_n_tshift | |
c5aa993b | 106 | |
c906108c SS |
107 | /* Local variables that hold the sizes in the file of various COFF structures. |
108 | (We only need to know this to read them from the file -- BFD will then | |
109 | translate the data in them, into `internal_xxx' structs in the right | |
110 | byte order, alignment, etc.) */ | |
111 | ||
c5aa993b JM |
112 | static unsigned local_linesz; |
113 | static unsigned local_symesz; | |
114 | static unsigned local_auxesz; | |
c906108c SS |
115 | |
116 | /* This is set if this is a PE format file. */ | |
117 | ||
118 | static int pe_file; | |
119 | ||
120 | /* Chain of typedefs of pointers to empty struct/union types. | |
121 | They are chained thru the SYMBOL_VALUE_CHAIN. */ | |
122 | ||
123 | static struct symbol *opaque_type_chain[HASHSIZE]; | |
124 | ||
125 | /* Complaints about various problems in the file being read */ | |
126 | ||
c5aa993b JM |
127 | struct complaint ef_complaint = |
128 | {"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0}; | |
c906108c | 129 | |
c5aa993b JM |
130 | struct complaint ef_stack_complaint = |
131 | {"`.ef' symbol without matching `.bf' symbol ignored starting at symnum %d", 0, 0}; | |
c906108c | 132 | |
c5aa993b JM |
133 | struct complaint eb_stack_complaint = |
134 | {"`.eb' symbol without matching `.bb' symbol ignored starting at symnum %d", 0, 0}; | |
c906108c SS |
135 | |
136 | struct complaint bf_no_aux_complaint = | |
c5aa993b | 137 | {"`.bf' symbol %d has no aux entry", 0, 0}; |
c906108c SS |
138 | |
139 | struct complaint ef_no_aux_complaint = | |
c5aa993b | 140 | {"`.ef' symbol %d has no aux entry", 0, 0}; |
c906108c SS |
141 | |
142 | struct complaint lineno_complaint = | |
c5aa993b | 143 | {"Line number pointer %d lower than start of line numbers", 0, 0}; |
c906108c SS |
144 | |
145 | struct complaint unexpected_type_complaint = | |
c5aa993b | 146 | {"Unexpected type for symbol %s", 0, 0}; |
c906108c SS |
147 | |
148 | struct complaint bad_sclass_complaint = | |
c5aa993b | 149 | {"Bad n_sclass for symbol %s", 0, 0}; |
c906108c SS |
150 | |
151 | struct complaint misordered_blocks_complaint = | |
c5aa993b | 152 | {"Blocks out of order at address %x", 0, 0}; |
c906108c SS |
153 | |
154 | struct complaint tagndx_bad_complaint = | |
c5aa993b | 155 | {"Symbol table entry for %s has bad tagndx value", 0, 0}; |
c906108c | 156 | |
c5aa993b JM |
157 | struct complaint eb_complaint = |
158 | {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0}; | |
c906108c SS |
159 | |
160 | /* Simplified internal version of coff symbol table information */ | |
161 | ||
c5aa993b JM |
162 | struct coff_symbol |
163 | { | |
164 | char *c_name; | |
165 | int c_symnum; /* symbol number of this entry */ | |
166 | int c_naux; /* 0 if syment only, 1 if syment + auxent, etc */ | |
167 | long c_value; | |
168 | int c_sclass; | |
169 | int c_secnum; | |
170 | unsigned int c_type; | |
171 | }; | |
c906108c | 172 | |
a14ed312 | 173 | extern void stabsread_clear_cache (void); |
7be570e7 | 174 | |
a14ed312 | 175 | static struct type *coff_read_struct_type (int, int, int); |
c906108c | 176 | |
a14ed312 KB |
177 | static struct type *decode_base_type (struct coff_symbol *, |
178 | unsigned int, union internal_auxent *); | |
c906108c | 179 | |
a14ed312 KB |
180 | static struct type *decode_type (struct coff_symbol *, unsigned int, |
181 | union internal_auxent *); | |
c906108c | 182 | |
a14ed312 KB |
183 | static struct type *decode_function_type (struct coff_symbol *, |
184 | unsigned int, | |
185 | union internal_auxent *); | |
c906108c | 186 | |
a14ed312 | 187 | static struct type *coff_read_enum_type (int, int, int); |
c906108c | 188 | |
a14ed312 KB |
189 | static struct symbol *process_coff_symbol (struct coff_symbol *, |
190 | union internal_auxent *, | |
191 | struct objfile *); | |
c906108c | 192 | |
a14ed312 | 193 | static void patch_opaque_types (struct symtab *); |
c906108c | 194 | |
a14ed312 | 195 | static void patch_type (struct type *, struct type *); |
c906108c | 196 | |
a14ed312 | 197 | static void enter_linenos (long, int, int, struct objfile *); |
c906108c | 198 | |
a14ed312 | 199 | static void free_linetab (void); |
c906108c | 200 | |
74b7792f AC |
201 | static void free_linetab_cleanup (void *ignore); |
202 | ||
a14ed312 | 203 | static int init_lineno (bfd *, long, int); |
c906108c | 204 | |
a14ed312 | 205 | static char *getsymname (struct internal_syment *); |
c906108c | 206 | |
a14ed312 | 207 | static char *coff_getfilename (union internal_auxent *); |
c906108c | 208 | |
a14ed312 | 209 | static void free_stringtab (void); |
c906108c | 210 | |
74b7792f AC |
211 | static void free_stringtab_cleanup (void *ignore); |
212 | ||
a14ed312 | 213 | static int init_stringtab (bfd *, long); |
c906108c | 214 | |
a14ed312 KB |
215 | static void read_one_sym (struct coff_symbol *, |
216 | struct internal_syment *, union internal_auxent *); | |
c906108c | 217 | |
a14ed312 | 218 | static void coff_symtab_read (long, unsigned int, struct objfile *); |
c906108c | 219 | |
a14ed312 | 220 | static void find_linenos (bfd *, sec_ptr, PTR); |
c906108c | 221 | |
a14ed312 | 222 | static void coff_symfile_init (struct objfile *); |
c906108c | 223 | |
a14ed312 | 224 | static void coff_new_init (struct objfile *); |
c906108c | 225 | |
a14ed312 | 226 | static void coff_symfile_read (struct objfile *, int); |
c906108c | 227 | |
a14ed312 | 228 | static void coff_symfile_finish (struct objfile *); |
c906108c | 229 | |
a14ed312 KB |
230 | static void record_minimal_symbol (char *, CORE_ADDR, |
231 | enum minimal_symbol_type, | |
232 | struct objfile *); | |
c906108c | 233 | |
a14ed312 | 234 | static void coff_end_symtab (struct objfile *); |
c906108c | 235 | |
a14ed312 | 236 | static void complete_symtab (char *, CORE_ADDR, unsigned int); |
c906108c | 237 | |
a14ed312 | 238 | static void coff_start_symtab (char *); |
c906108c | 239 | |
a14ed312 | 240 | static struct type *coff_alloc_type (int); |
c906108c | 241 | |
a14ed312 | 242 | static struct type **coff_lookup_type (int); |
c906108c | 243 | |
a14ed312 | 244 | static void coff_locate_sections (bfd *, asection *, PTR); |
c906108c SS |
245 | \f |
246 | /* We are called once per section from coff_symfile_read. We | |
247 | need to examine each section we are passed, check to see | |
248 | if it is something we are interested in processing, and | |
249 | if so, stash away some access information for the section. | |
250 | ||
251 | FIXME: The section names should not be hardwired strings (what | |
252 | should they be? I don't think most object file formats have enough | |
253 | section flags to specify what kind of debug section it is | |
254 | -kingdon). */ | |
255 | ||
256 | static void | |
fba45db2 | 257 | coff_locate_sections (bfd *abfd, asection *sectp, PTR csip) |
c906108c SS |
258 | { |
259 | register struct coff_symfile_info *csi; | |
260 | const char *name; | |
261 | ||
262 | csi = (struct coff_symfile_info *) csip; | |
263 | name = bfd_get_section_name (abfd, sectp); | |
264 | if (STREQ (name, ".text")) | |
265 | { | |
266 | csi->textaddr = bfd_section_vma (abfd, sectp); | |
267 | csi->textsize += bfd_section_size (abfd, sectp); | |
268 | } | |
269 | else if (strncmp (name, ".text", sizeof ".text" - 1) == 0) | |
270 | { | |
271 | csi->textsize += bfd_section_size (abfd, sectp); | |
272 | } | |
273 | else if (STREQ (name, ".stabstr")) | |
274 | { | |
275 | csi->stabstrsect = sectp; | |
276 | } | |
277 | else if (strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
278 | { | |
279 | const char *s; | |
280 | ||
281 | /* We can have multiple .stab sections if linked with | |
282 | --split-by-reloc. */ | |
283 | for (s = name + sizeof ".stab" - 1; *s != '\0'; s++) | |
c5aa993b | 284 | if (!isdigit (*s)) |
c906108c SS |
285 | break; |
286 | if (*s == '\0') | |
287 | { | |
288 | struct stab_section_list *n, **pn; | |
289 | ||
290 | n = ((struct stab_section_list *) | |
291 | xmalloc (sizeof (struct stab_section_list))); | |
292 | n->section = sectp; | |
293 | n->next = NULL; | |
294 | for (pn = &csi->stabsects; *pn != NULL; pn = &(*pn)->next) | |
295 | ; | |
296 | *pn = n; | |
297 | ||
298 | /* This will be run after coffstab_build_psymtabs is called | |
c5aa993b JM |
299 | in coff_symfile_read, at which point we no longer need |
300 | the information. */ | |
b8c9b27d | 301 | make_cleanup (xfree, n); |
c906108c SS |
302 | } |
303 | } | |
304 | } | |
305 | ||
306 | /* Return the section_offsets* that CS points to. */ | |
a14ed312 | 307 | static int cs_to_section (struct coff_symbol *, struct objfile *); |
c906108c | 308 | |
c5aa993b JM |
309 | struct find_targ_sec_arg |
310 | { | |
311 | int targ_index; | |
312 | asection **resultp; | |
313 | }; | |
c906108c | 314 | |
a14ed312 | 315 | static void find_targ_sec (bfd *, asection *, void *); |
c906108c | 316 | |
c5aa993b | 317 | static void |
fba45db2 | 318 | find_targ_sec (bfd *abfd, asection *sect, PTR obj) |
c906108c | 319 | { |
c5aa993b | 320 | struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj; |
c906108c SS |
321 | if (sect->target_index == args->targ_index) |
322 | *args->resultp = sect; | |
323 | } | |
324 | ||
325 | /* Return the section number (SECT_OFF_*) that CS points to. */ | |
326 | static int | |
fba45db2 | 327 | cs_to_section (struct coff_symbol *cs, struct objfile *objfile) |
c906108c SS |
328 | { |
329 | asection *sect = NULL; | |
330 | struct find_targ_sec_arg args; | |
b8fbeb18 | 331 | int off = SECT_OFF_TEXT (objfile); |
c906108c SS |
332 | |
333 | args.targ_index = cs->c_secnum; | |
334 | args.resultp = § | |
335 | bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); | |
336 | if (sect != NULL) | |
337 | { | |
338 | /* This is the section. Figure out what SECT_OFF_* code it is. */ | |
339 | if (bfd_get_section_flags (abfd, sect) & SEC_CODE) | |
b8fbeb18 | 340 | off = SECT_OFF_TEXT (objfile); |
c906108c | 341 | else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD) |
b8fbeb18 | 342 | off = SECT_OFF_DATA (objfile); |
c906108c | 343 | else |
a4c8257b EZ |
344 | /* Just return the bfd section index. */ |
345 | off = sect->index; | |
c906108c SS |
346 | } |
347 | return off; | |
348 | } | |
349 | ||
350 | /* Return the address of the section of a COFF symbol. */ | |
351 | ||
a14ed312 | 352 | static CORE_ADDR cs_section_address (struct coff_symbol *, bfd *); |
c906108c SS |
353 | |
354 | static CORE_ADDR | |
fba45db2 | 355 | cs_section_address (struct coff_symbol *cs, bfd *abfd) |
c906108c SS |
356 | { |
357 | asection *sect = NULL; | |
358 | struct find_targ_sec_arg args; | |
359 | CORE_ADDR addr = 0; | |
360 | ||
361 | args.targ_index = cs->c_secnum; | |
362 | args.resultp = § | |
363 | bfd_map_over_sections (abfd, find_targ_sec, &args); | |
364 | if (sect != NULL) | |
365 | addr = bfd_get_section_vma (objfile->obfd, sect); | |
366 | return addr; | |
367 | } | |
368 | ||
369 | /* Look up a coff type-number index. Return the address of the slot | |
370 | where the type for that index is stored. | |
371 | The type-number is in INDEX. | |
372 | ||
373 | This can be used for finding the type associated with that index | |
374 | or for associating a new type with the index. */ | |
375 | ||
376 | static struct type ** | |
fba45db2 | 377 | coff_lookup_type (register int index) |
c906108c SS |
378 | { |
379 | if (index >= type_vector_length) | |
380 | { | |
381 | int old_vector_length = type_vector_length; | |
382 | ||
383 | type_vector_length *= 2; | |
c5aa993b | 384 | if (index /* is still */ >= type_vector_length) |
c906108c SS |
385 | type_vector_length = index * 2; |
386 | ||
387 | type_vector = (struct type **) | |
388 | xrealloc ((char *) type_vector, | |
389 | type_vector_length * sizeof (struct type *)); | |
390 | memset (&type_vector[old_vector_length], 0, | |
c5aa993b | 391 | (type_vector_length - old_vector_length) * sizeof (struct type *)); |
c906108c SS |
392 | } |
393 | return &type_vector[index]; | |
394 | } | |
395 | ||
396 | /* Make sure there is a type allocated for type number index | |
397 | and return the type object. | |
398 | This can create an empty (zeroed) type object. */ | |
399 | ||
400 | static struct type * | |
fba45db2 | 401 | coff_alloc_type (int index) |
c906108c SS |
402 | { |
403 | register struct type **type_addr = coff_lookup_type (index); | |
404 | register struct type *type = *type_addr; | |
405 | ||
406 | /* If we are referring to a type not known at all yet, | |
407 | allocate an empty type for it. | |
408 | We will fill it in later if we find out how. */ | |
409 | if (type == NULL) | |
410 | { | |
411 | type = alloc_type (current_objfile); | |
412 | *type_addr = type; | |
413 | } | |
414 | return type; | |
415 | } | |
416 | \f | |
c906108c SS |
417 | /* Start a new symtab for a new source file. |
418 | This is called when a COFF ".file" symbol is seen; | |
419 | it indicates the start of data for one original source file. */ | |
420 | ||
421 | static void | |
fba45db2 | 422 | coff_start_symtab (char *name) |
c906108c SS |
423 | { |
424 | start_symtab ( | |
c5aa993b JM |
425 | /* We fill in the filename later. start_symtab puts |
426 | this pointer into last_source_file and we put it in | |
427 | subfiles->name, which end_symtab frees; that's why | |
428 | it must be malloc'd. */ | |
429 | savestring (name, strlen (name)), | |
430 | /* We never know the directory name for COFF. */ | |
431 | NULL, | |
432 | /* The start address is irrelevant, since we set | |
433 | last_source_start_addr in coff_end_symtab. */ | |
434 | 0); | |
c906108c | 435 | record_debugformat ("COFF"); |
c906108c SS |
436 | } |
437 | ||
438 | /* Save the vital information from when starting to read a file, | |
439 | for use when closing off the current file. | |
440 | NAME is the file name the symbols came from, START_ADDR is the first | |
441 | text address for the file, and SIZE is the number of bytes of text. */ | |
442 | ||
443 | static void | |
fba45db2 | 444 | complete_symtab (char *name, CORE_ADDR start_addr, unsigned int size) |
c906108c SS |
445 | { |
446 | if (last_source_file != NULL) | |
b8c9b27d | 447 | xfree (last_source_file); |
c906108c SS |
448 | last_source_file = savestring (name, strlen (name)); |
449 | current_source_start_addr = start_addr; | |
450 | current_source_end_addr = start_addr + size; | |
451 | ||
c5aa993b JM |
452 | if (current_objfile->ei.entry_point >= current_source_start_addr && |
453 | current_objfile->ei.entry_point < current_source_end_addr) | |
c906108c | 454 | { |
c5aa993b JM |
455 | current_objfile->ei.entry_file_lowpc = current_source_start_addr; |
456 | current_objfile->ei.entry_file_highpc = current_source_end_addr; | |
c906108c SS |
457 | } |
458 | } | |
459 | ||
460 | /* Finish the symbol definitions for one main source file, | |
461 | close off all the lexical contexts for that file | |
462 | (creating struct block's for them), then make the | |
463 | struct symtab for that file and put it in the list of all such. */ | |
464 | ||
465 | static void | |
fba45db2 | 466 | coff_end_symtab (struct objfile *objfile) |
c906108c SS |
467 | { |
468 | struct symtab *symtab; | |
469 | ||
470 | last_source_start_addr = current_source_start_addr; | |
471 | ||
44c75fb3 | 472 | symtab = end_symtab (current_source_end_addr, objfile, SECT_OFF_TEXT (objfile)); |
c906108c SS |
473 | |
474 | if (symtab != NULL) | |
475 | free_named_symtabs (symtab->filename); | |
476 | ||
477 | /* Reinitialize for beginning of new file. */ | |
c906108c SS |
478 | last_source_file = NULL; |
479 | } | |
480 | \f | |
481 | static void | |
fba45db2 KB |
482 | record_minimal_symbol (char *name, CORE_ADDR address, |
483 | enum minimal_symbol_type type, struct objfile *objfile) | |
c906108c SS |
484 | { |
485 | /* We don't want TDESC entry points in the minimal symbol table */ | |
c5aa993b JM |
486 | if (name[0] == '@') |
487 | return; | |
c906108c SS |
488 | |
489 | prim_record_minimal_symbol (name, address, type, objfile); | |
490 | } | |
491 | \f | |
492 | /* coff_symfile_init () | |
493 | is the coff-specific initialization routine for reading symbols. | |
494 | It is passed a struct objfile which contains, among other things, | |
495 | the BFD for the file whose symbols are being read, and a slot for | |
496 | a pointer to "private data" which we fill with cookies and other | |
497 | treats for coff_symfile_read (). | |
498 | ||
499 | We will only be called if this is a COFF or COFF-like file. | |
500 | BFD handles figuring out the format of the file, and code in symtab.c | |
501 | uses BFD's determination to vector to us. | |
502 | ||
503 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ | |
504 | ||
505 | static void | |
fba45db2 | 506 | coff_symfile_init (struct objfile *objfile) |
c906108c SS |
507 | { |
508 | /* Allocate struct to keep track of stab reading. */ | |
509 | objfile->sym_stab_info = (struct dbx_symfile_info *) | |
510 | xmmalloc (objfile->md, sizeof (struct dbx_symfile_info)); | |
511 | ||
512 | memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info)); | |
513 | ||
514 | /* Allocate struct to keep track of the symfile */ | |
515 | objfile->sym_private = xmmalloc (objfile->md, | |
516 | sizeof (struct coff_symfile_info)); | |
517 | ||
518 | memset (objfile->sym_private, 0, sizeof (struct coff_symfile_info)); | |
519 | ||
520 | /* COFF objects may be reordered, so set OBJF_REORDERED. If we | |
521 | find this causes a significant slowdown in gdb then we could | |
522 | set it in the debug symbol readers only when necessary. */ | |
523 | objfile->flags |= OBJF_REORDERED; | |
524 | ||
525 | init_entry_point_info (objfile); | |
526 | } | |
527 | ||
528 | /* This function is called for every section; it finds the outer limits | |
529 | of the line table (minimum and maximum file offset) so that the | |
530 | mainline code can read the whole thing for efficiency. */ | |
531 | ||
532 | /* ARGSUSED */ | |
533 | static void | |
fba45db2 | 534 | find_linenos (bfd *abfd, sec_ptr asect, PTR vpinfo) |
c906108c SS |
535 | { |
536 | struct coff_symfile_info *info; | |
537 | int size, count; | |
538 | file_ptr offset, maxoff; | |
539 | ||
540 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
541 | count = asect->lineno_count; | |
542 | /* End of warning */ | |
543 | ||
544 | if (count == 0) | |
545 | return; | |
546 | size = count * local_linesz; | |
547 | ||
c5aa993b | 548 | info = (struct coff_symfile_info *) vpinfo; |
c906108c SS |
549 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
550 | offset = asect->line_filepos; | |
551 | /* End of warning */ | |
552 | ||
553 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) | |
554 | info->min_lineno_offset = offset; | |
555 | ||
556 | maxoff = offset + size; | |
557 | if (maxoff > info->max_lineno_offset) | |
558 | info->max_lineno_offset = maxoff; | |
559 | } | |
560 | ||
561 | ||
562 | /* The BFD for this file -- only good while we're actively reading | |
563 | symbols into a psymtab or a symtab. */ | |
564 | ||
565 | static bfd *symfile_bfd; | |
566 | ||
567 | /* Read a symbol file, after initialization by coff_symfile_init. */ | |
568 | ||
569 | /* ARGSUSED */ | |
570 | static void | |
fba45db2 | 571 | coff_symfile_read (struct objfile *objfile, int mainline) |
c906108c SS |
572 | { |
573 | struct coff_symfile_info *info; | |
574 | struct dbx_symfile_info *dbxinfo; | |
575 | bfd *abfd = objfile->obfd; | |
576 | coff_data_type *cdata = coff_data (abfd); | |
577 | char *name = bfd_get_filename (abfd); | |
578 | register int val; | |
745b8ca0 | 579 | unsigned int num_symbols; |
c906108c SS |
580 | int symtab_offset; |
581 | int stringtab_offset; | |
582 | struct cleanup *back_to; | |
583 | int stabstrsize; | |
c2d11a7d JM |
584 | int len; |
585 | char * target; | |
586 | ||
c5aa993b | 587 | info = (struct coff_symfile_info *) objfile->sym_private; |
c906108c | 588 | dbxinfo = objfile->sym_stab_info; |
c5aa993b | 589 | symfile_bfd = abfd; /* Kludge for swap routines */ |
c906108c SS |
590 | |
591 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
c5aa993b JM |
592 | num_symbols = bfd_get_symcount (abfd); /* How many syms */ |
593 | symtab_offset = cdata->sym_filepos; /* Symbol table file offset */ | |
594 | stringtab_offset = symtab_offset + /* String table file offset */ | |
595 | num_symbols * cdata->local_symesz; | |
c906108c SS |
596 | |
597 | /* Set a few file-statics that give us specific information about | |
598 | the particular COFF file format we're reading. */ | |
c906108c SS |
599 | local_n_btmask = cdata->local_n_btmask; |
600 | local_n_btshft = cdata->local_n_btshft; | |
c5aa993b | 601 | local_n_tmask = cdata->local_n_tmask; |
c906108c | 602 | local_n_tshift = cdata->local_n_tshift; |
c5aa993b JM |
603 | local_linesz = cdata->local_linesz; |
604 | local_symesz = cdata->local_symesz; | |
605 | local_auxesz = cdata->local_auxesz; | |
c906108c SS |
606 | |
607 | /* Allocate space for raw symbol and aux entries, based on their | |
608 | space requirements as reported by BFD. */ | |
609 | temp_sym = (char *) xmalloc | |
c5aa993b | 610 | (cdata->local_symesz + cdata->local_auxesz); |
c906108c | 611 | temp_aux = temp_sym + cdata->local_symesz; |
c13c43fd | 612 | back_to = make_cleanup (free_current_contents, &temp_sym); |
c906108c SS |
613 | |
614 | /* We need to know whether this is a PE file, because in PE files, | |
615 | unlike standard COFF files, symbol values are stored as offsets | |
616 | from the section address, rather than as absolute addresses. | |
617 | FIXME: We should use BFD to read the symbol table, and thus avoid | |
618 | this problem. */ | |
0d06e24b JM |
619 | pe_file = |
620 | strncmp (bfd_get_target (objfile->obfd), "pe", 2) == 0 | |
621 | || strncmp (bfd_get_target (objfile->obfd), "epoc-pe", 7) == 0; | |
c906108c SS |
622 | |
623 | /* End of warning */ | |
624 | ||
625 | /* Read the line number table, all at once. */ | |
626 | info->min_lineno_offset = 0; | |
627 | info->max_lineno_offset = 0; | |
628 | bfd_map_over_sections (abfd, find_linenos, (PTR) info); | |
629 | ||
74b7792f | 630 | make_cleanup (free_linetab_cleanup, 0 /*ignore*/); |
c5aa993b | 631 | val = init_lineno (abfd, info->min_lineno_offset, |
c906108c SS |
632 | info->max_lineno_offset - info->min_lineno_offset); |
633 | if (val < 0) | |
634 | error ("\"%s\": error reading line numbers\n", name); | |
635 | ||
636 | /* Now read the string table, all at once. */ | |
637 | ||
74b7792f | 638 | make_cleanup (free_stringtab_cleanup, 0 /*ignore*/); |
c906108c SS |
639 | val = init_stringtab (abfd, stringtab_offset); |
640 | if (val < 0) | |
641 | error ("\"%s\": can't get string table", name); | |
642 | ||
643 | init_minimal_symbol_collection (); | |
56e290f4 | 644 | make_cleanup_discard_minimal_symbols (); |
c906108c SS |
645 | |
646 | /* Now that the executable file is positioned at symbol table, | |
647 | process it and define symbols accordingly. */ | |
648 | ||
96baa820 | 649 | coff_symtab_read ((long) symtab_offset, num_symbols, objfile); |
c906108c SS |
650 | |
651 | /* Sort symbols alphabetically within each block. */ | |
652 | ||
653 | { | |
654 | struct symtab *s; | |
655 | ||
c5aa993b | 656 | for (s = objfile->symtabs; s != NULL; s = s->next) |
c906108c SS |
657 | sort_symtab_syms (s); |
658 | } | |
659 | ||
660 | /* Install any minimal symbols that have been collected as the current | |
661 | minimal symbols for this objfile. */ | |
662 | ||
663 | install_minimal_symbols (objfile); | |
664 | ||
665 | bfd_map_over_sections (abfd, coff_locate_sections, (PTR) info); | |
666 | ||
667 | if (info->stabsects) | |
668 | { | |
c5aa993b | 669 | if (!info->stabstrsect) |
b83266a0 SS |
670 | { |
671 | error_begin (); | |
672 | fprintf_filtered | |
673 | (gdb_stderr, | |
674 | ("The debugging information in `%s' is corrupted.\n" | |
c5aa993b | 675 | "The file has a `.stabs' section, but no `.stabstr' section.\n"), |
b83266a0 SS |
676 | name); |
677 | return_to_top_level (RETURN_ERROR); | |
678 | } | |
679 | ||
c906108c | 680 | /* FIXME: dubious. Why can't we use something normal like |
c5aa993b | 681 | bfd_get_section_contents? */ |
c906108c SS |
682 | bfd_seek (abfd, abfd->where, 0); |
683 | ||
684 | stabstrsize = bfd_section_size (abfd, info->stabstrsect); | |
685 | ||
686 | coffstab_build_psymtabs (objfile, | |
c906108c SS |
687 | mainline, |
688 | info->textaddr, info->textsize, | |
689 | info->stabsects, | |
690 | info->stabstrsect->filepos, stabstrsize); | |
691 | } | |
692 | ||
693 | do_cleanups (back_to); | |
694 | } | |
695 | ||
696 | static void | |
fba45db2 | 697 | coff_new_init (struct objfile *ignore) |
c906108c SS |
698 | { |
699 | } | |
700 | ||
701 | /* Perform any local cleanups required when we are done with a particular | |
702 | objfile. I.E, we are in the process of discarding all symbol information | |
703 | for an objfile, freeing up all memory held for it, and unlinking the | |
704 | objfile struct from the global list of known objfiles. */ | |
705 | ||
706 | static void | |
fba45db2 | 707 | coff_symfile_finish (struct objfile *objfile) |
c906108c | 708 | { |
c5aa993b | 709 | if (objfile->sym_private != NULL) |
c906108c | 710 | { |
c5aa993b | 711 | mfree (objfile->md, objfile->sym_private); |
c906108c | 712 | } |
7be570e7 JM |
713 | |
714 | /* Let stabs reader clean up */ | |
715 | stabsread_clear_cache (); | |
c906108c | 716 | } |
c906108c | 717 | \f |
c5aa993b | 718 | |
c906108c SS |
719 | /* Given pointers to a symbol table in coff style exec file, |
720 | analyze them and create struct symtab's describing the symbols. | |
721 | NSYMS is the number of symbols in the symbol table. | |
722 | We read them one at a time using read_one_sym (). */ | |
723 | ||
724 | static void | |
fba45db2 KB |
725 | coff_symtab_read (long symtab_offset, unsigned int nsyms, |
726 | struct objfile *objfile) | |
c906108c SS |
727 | { |
728 | register struct context_stack *new; | |
729 | struct coff_symbol coff_symbol; | |
730 | register struct coff_symbol *cs = &coff_symbol; | |
731 | static struct internal_syment main_sym; | |
732 | static union internal_auxent main_aux; | |
733 | struct coff_symbol fcn_cs_saved; | |
734 | static struct internal_syment fcn_sym_saved; | |
735 | static union internal_auxent fcn_aux_saved; | |
736 | struct symtab *s; | |
737 | /* A .file is open. */ | |
738 | int in_source_file = 0; | |
739 | int next_file_symnum = -1; | |
740 | /* Name of the current file. */ | |
741 | char *filestring = ""; | |
742 | int depth = 0; | |
743 | int fcn_first_line = 0; | |
b9179dbc | 744 | CORE_ADDR fcn_first_line_addr = 0; |
c906108c SS |
745 | int fcn_last_line = 0; |
746 | int fcn_start_addr = 0; | |
747 | long fcn_line_ptr = 0; | |
748 | int val; | |
749 | CORE_ADDR tmpaddr; | |
750 | ||
751 | /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous.... | |
752 | it's hard to know I've really worked around it. The fix should be | |
753 | harmless, anyway). The symptom of the bug is that the first | |
754 | fread (in read_one_sym), will (in my example) actually get data | |
755 | from file offset 268, when the fseek was to 264 (and ftell shows | |
756 | 264). This causes all hell to break loose. I was unable to | |
757 | reproduce this on a short test program which operated on the same | |
758 | file, performing (I think) the same sequence of operations. | |
759 | ||
760 | It stopped happening when I put in this (former) rewind(). | |
761 | ||
762 | FIXME: Find out if this has been reported to Sun, whether it has | |
763 | been fixed in a later release, etc. */ | |
764 | ||
765 | bfd_seek (objfile->obfd, 0, 0); | |
766 | ||
767 | /* Position to read the symbol table. */ | |
768 | val = bfd_seek (objfile->obfd, (long) symtab_offset, 0); | |
769 | if (val < 0) | |
770 | perror_with_name (objfile->name); | |
771 | ||
772 | current_objfile = objfile; | |
773 | nlist_bfd_global = objfile->obfd; | |
774 | nlist_nsyms_global = nsyms; | |
775 | last_source_file = NULL; | |
776 | memset (opaque_type_chain, 0, sizeof opaque_type_chain); | |
777 | ||
c5aa993b | 778 | if (type_vector) /* Get rid of previous one */ |
b8c9b27d | 779 | xfree (type_vector); |
c906108c SS |
780 | type_vector_length = 160; |
781 | type_vector = (struct type **) | |
782 | xmalloc (type_vector_length * sizeof (struct type *)); | |
783 | memset (type_vector, 0, type_vector_length * sizeof (struct type *)); | |
784 | ||
785 | coff_start_symtab (""); | |
786 | ||
787 | symnum = 0; | |
788 | while (symnum < nsyms) | |
789 | { | |
790 | QUIT; /* Make this command interruptable. */ | |
791 | ||
792 | read_one_sym (cs, &main_sym, &main_aux); | |
793 | ||
794 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) | |
795 | { | |
796 | if (last_source_file) | |
797 | coff_end_symtab (objfile); | |
798 | ||
799 | coff_start_symtab ("_globals_"); | |
800 | complete_symtab ("_globals_", 0, 0); | |
801 | /* done with all files, everything from here on out is globals */ | |
802 | } | |
803 | ||
804 | /* Special case for file with type declarations only, no text. */ | |
805 | if (!last_source_file && SDB_TYPE (cs->c_type) | |
806 | && cs->c_secnum == N_DEBUG) | |
807 | complete_symtab (filestring, 0, 0); | |
808 | ||
809 | /* Typedefs should not be treated as symbol definitions. */ | |
810 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) | |
811 | { | |
812 | /* Record all functions -- external and static -- in minsyms. */ | |
b8fbeb18 | 813 | tmpaddr = cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c SS |
814 | record_minimal_symbol (cs->c_name, tmpaddr, mst_text, objfile); |
815 | ||
816 | fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; | |
817 | fcn_start_addr = tmpaddr; | |
818 | fcn_cs_saved = *cs; | |
819 | fcn_sym_saved = main_sym; | |
820 | fcn_aux_saved = main_aux; | |
821 | continue; | |
822 | } | |
823 | ||
824 | switch (cs->c_sclass) | |
825 | { | |
c5aa993b JM |
826 | case C_EFCN: |
827 | case C_EXTDEF: | |
828 | case C_ULABEL: | |
829 | case C_USTATIC: | |
830 | case C_LINE: | |
831 | case C_ALIAS: | |
832 | case C_HIDDEN: | |
833 | complain (&bad_sclass_complaint, cs->c_name); | |
834 | break; | |
c906108c | 835 | |
c5aa993b JM |
836 | case C_FILE: |
837 | /* c_value field contains symnum of next .file entry in table | |
838 | or symnum of first global after last .file. */ | |
839 | next_file_symnum = cs->c_value; | |
840 | if (cs->c_naux > 0) | |
841 | filestring = coff_getfilename (&main_aux); | |
842 | else | |
843 | filestring = ""; | |
844 | ||
845 | /* Complete symbol table for last object file | |
846 | containing debugging information. */ | |
847 | if (last_source_file) | |
848 | { | |
849 | coff_end_symtab (objfile); | |
850 | coff_start_symtab (filestring); | |
851 | } | |
852 | in_source_file = 1; | |
853 | break; | |
c906108c SS |
854 | |
855 | /* C_LABEL is used for labels and static functions. Including | |
856 | it here allows gdb to see static functions when no debug | |
857 | info is available. */ | |
c5aa993b JM |
858 | case C_LABEL: |
859 | /* However, labels within a function can make weird backtraces, | |
860 | so filter them out (from phdm@macqel.be). */ | |
861 | if (within_function) | |
862 | break; | |
863 | case C_STAT: | |
864 | case C_THUMBLABEL: | |
865 | case C_THUMBSTAT: | |
866 | case C_THUMBSTATFUNC: | |
867 | if (cs->c_name[0] == '.') | |
868 | { | |
869 | if (STREQ (cs->c_name, ".text")) | |
870 | { | |
c906108c SS |
871 | /* FIXME: don't wire in ".text" as section name |
872 | or symbol name! */ | |
873 | /* Check for in_source_file deals with case of | |
874 | a file with debugging symbols | |
875 | followed by a later file with no symbols. */ | |
876 | if (in_source_file) | |
877 | complete_symtab (filestring, | |
b8fbeb18 | 878 | cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)), |
c906108c SS |
879 | main_aux.x_scn.x_scnlen); |
880 | in_source_file = 0; | |
881 | } | |
c5aa993b | 882 | /* flush rest of '.' symbols */ |
c906108c | 883 | break; |
c5aa993b JM |
884 | } |
885 | else if (!SDB_TYPE (cs->c_type) | |
886 | && cs->c_name[0] == 'L' | |
887 | && (strncmp (cs->c_name, "LI%", 3) == 0 | |
888 | || strncmp (cs->c_name, "LF%", 3) == 0 | |
889 | || strncmp (cs->c_name, "LC%", 3) == 0 | |
890 | || strncmp (cs->c_name, "LP%", 3) == 0 | |
891 | || strncmp (cs->c_name, "LPB%", 4) == 0 | |
892 | || strncmp (cs->c_name, "LBB%", 4) == 0 | |
893 | || strncmp (cs->c_name, "LBE%", 4) == 0 | |
894 | || strncmp (cs->c_name, "LPBX%", 5) == 0)) | |
895 | /* At least on a 3b1, gcc generates swbeg and string labels | |
896 | that look like this. Ignore them. */ | |
897 | break; | |
898 | /* fall in for static symbols that don't start with '.' */ | |
899 | case C_THUMBEXT: | |
900 | case C_THUMBEXTFUNC: | |
901 | case C_EXT: | |
902 | { | |
903 | /* Record it in the minimal symbols regardless of | |
904 | SDB_TYPE. This parallels what we do for other debug | |
905 | formats, and probably is needed to make | |
906 | print_address_symbolic work right without the (now | |
907 | gone) "set fast-symbolic-addr off" kludge. */ | |
c906108c | 908 | |
c5aa993b JM |
909 | /* FIXME: should use mst_abs, and not relocate, if absolute. */ |
910 | enum minimal_symbol_type ms_type; | |
911 | int sec; | |
c906108c | 912 | |
c5aa993b JM |
913 | if (cs->c_secnum == N_UNDEF) |
914 | { | |
915 | /* This is a common symbol. See if the target | |
916 | environment knows where it has been relocated to. */ | |
917 | CORE_ADDR reladdr; | |
918 | if (target_lookup_symbol (cs->c_name, &reladdr)) | |
919 | { | |
920 | /* Error in lookup; ignore symbol. */ | |
921 | break; | |
922 | } | |
923 | tmpaddr = reladdr; | |
924 | /* The address has already been relocated; make sure that | |
925 | objfile_relocate doesn't relocate it again. */ | |
926 | sec = -2; | |
927 | ms_type = cs->c_sclass == C_EXT | |
928 | || cs->c_sclass == C_THUMBEXT ? | |
929 | mst_bss : mst_file_bss; | |
930 | } | |
931 | else | |
932 | { | |
933 | sec = cs_to_section (cs, objfile); | |
934 | tmpaddr = cs->c_value; | |
935 | if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC | |
936 | || cs->c_sclass == C_THUMBEXT) | |
96baa820 | 937 | tmpaddr += ANOFFSET (objfile->section_offsets, sec); |
c906108c | 938 | |
2ec466f9 | 939 | if (sec == SECT_OFF_TEXT (objfile)) |
c5aa993b | 940 | { |
c5aa993b JM |
941 | ms_type = |
942 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC | |
943 | || cs->c_sclass == C_THUMBEXT ? | |
944 | mst_text : mst_file_text; | |
c906108c | 945 | #ifdef SMASH_TEXT_ADDRESS |
c5aa993b JM |
946 | if (tmpaddr & 1) /* FIXME: delete this line */ |
947 | SMASH_TEXT_ADDRESS (tmpaddr); | |
c906108c | 948 | #endif |
b8fbeb18 | 949 | } |
34e924c0 EZ |
950 | else if (sec == SECT_OFF_DATA (objfile)) |
951 | { | |
c5aa993b JM |
952 | ms_type = |
953 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? | |
954 | mst_data : mst_file_data; | |
34e924c0 EZ |
955 | } |
956 | else if (sec == SECT_OFF_BSS (objfile)) | |
957 | { | |
c5aa993b JM |
958 | ms_type = |
959 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? | |
960 | mst_data : mst_file_data; | |
34e924c0 EZ |
961 | } |
962 | else | |
963 | ms_type = mst_unknown; | |
c5aa993b | 964 | } |
c906108c | 965 | |
c5aa993b JM |
966 | if (cs->c_name[0] != '@' /* Skip tdesc symbols */ ) |
967 | { | |
968 | struct minimal_symbol *msym; | |
c906108c | 969 | |
6ec4c4bd EZ |
970 | /* FIXME: cagney/2001-02-01: The nasty (int) -> (long) |
971 | -> (void*) cast is to ensure that that the value of | |
972 | cs->c_sclass can be correctly stored in a void | |
973 | pointer in MSYMBOL_INFO. Better solutions | |
974 | welcome. */ | |
975 | gdb_assert (sizeof (void *) >= sizeof (cs->c_sclass)); | |
c5aa993b | 976 | msym = prim_record_minimal_symbol_and_info |
6ec4c4bd EZ |
977 | (cs->c_name, tmpaddr, ms_type, (void *) (long) cs->c_sclass, |
978 | sec, NULL, objfile); | |
c906108c | 979 | #ifdef COFF_MAKE_MSYMBOL_SPECIAL |
c5aa993b JM |
980 | if (msym) |
981 | COFF_MAKE_MSYMBOL_SPECIAL (cs->c_sclass, msym); | |
c906108c | 982 | #endif |
c5aa993b JM |
983 | } |
984 | if (SDB_TYPE (cs->c_type)) | |
985 | { | |
986 | struct symbol *sym; | |
987 | sym = process_coff_symbol | |
96baa820 | 988 | (cs, &main_aux, objfile); |
c5aa993b JM |
989 | SYMBOL_VALUE (sym) = tmpaddr; |
990 | SYMBOL_SECTION (sym) = sec; | |
991 | } | |
992 | } | |
993 | break; | |
994 | ||
995 | case C_FCN: | |
996 | if (STREQ (cs->c_name, ".bf")) | |
997 | { | |
998 | within_function = 1; | |
999 | ||
1000 | /* value contains address of first non-init type code */ | |
1001 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1002 | contains line number of '{' } */ | |
1003 | if (cs->c_naux != 1) | |
1004 | complain (&bf_no_aux_complaint, cs->c_symnum); | |
1005 | fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1006 | fcn_first_line_addr = cs->c_value; | |
1007 | ||
1008 | /* Might want to check that locals are 0 and | |
1009 | context_stack_depth is zero, and complain if not. */ | |
1010 | ||
1011 | depth = 0; | |
1012 | new = push_context (depth, fcn_start_addr); | |
1013 | fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); | |
1014 | new->name = | |
96baa820 | 1015 | process_coff_symbol (&fcn_cs_saved, &fcn_aux_saved, objfile); |
c5aa993b JM |
1016 | } |
1017 | else if (STREQ (cs->c_name, ".ef")) | |
1018 | { | |
b9179dbc EZ |
1019 | if (!within_function) |
1020 | error ("Bad coff function information\n"); | |
c5aa993b JM |
1021 | /* the value of .ef is the address of epilogue code; |
1022 | not useful for gdb. */ | |
1023 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
1024 | contains number of lines to '}' */ | |
1025 | ||
1026 | if (context_stack_depth <= 0) | |
1027 | { /* We attempted to pop an empty context stack */ | |
1028 | complain (&ef_stack_complaint, cs->c_symnum); | |
1029 | within_function = 0; | |
1030 | break; | |
c906108c | 1031 | } |
c5aa993b JM |
1032 | |
1033 | new = pop_context (); | |
1034 | /* Stack must be empty now. */ | |
1035 | if (context_stack_depth > 0 || new == NULL) | |
c906108c | 1036 | { |
c5aa993b JM |
1037 | complain (&ef_complaint, cs->c_symnum); |
1038 | within_function = 0; | |
1039 | break; | |
c906108c | 1040 | } |
c5aa993b JM |
1041 | if (cs->c_naux != 1) |
1042 | { | |
1043 | complain (&ef_no_aux_complaint, cs->c_symnum); | |
1044 | fcn_last_line = 0x7FFFFFFF; | |
1045 | } | |
1046 | else | |
1047 | { | |
1048 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1049 | } | |
1050 | /* fcn_first_line is the line number of the opening '{'. | |
1051 | Do not record it - because it would affect gdb's idea | |
1052 | of the line number of the first statement of the function - | |
1053 | except for one-line functions, for which it is also the line | |
1054 | number of all the statements and of the closing '}', and | |
1055 | for which we do not have any other statement-line-number. */ | |
1056 | if (fcn_last_line == 1) | |
1057 | record_line (current_subfile, fcn_first_line, | |
1058 | fcn_first_line_addr); | |
1059 | else | |
1060 | enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line, | |
d4f3574e | 1061 | objfile); |
c906108c | 1062 | |
c5aa993b JM |
1063 | finish_block (new->name, &local_symbols, new->old_blocks, |
1064 | new->start_addr, | |
c906108c | 1065 | #if defined (FUNCTION_EPILOGUE_SIZE) |
c5aa993b JM |
1066 | /* This macro should be defined only on |
1067 | machines where the | |
1068 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
1069 | field is always zero. | |
1070 | So use the .bf record information that | |
1071 | points to the epilogue and add the size | |
1072 | of the epilogue. */ | |
1073 | cs->c_value | |
1074 | + FUNCTION_EPILOGUE_SIZE | |
b8fbeb18 | 1075 | + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)), |
c906108c | 1076 | #else |
c5aa993b JM |
1077 | fcn_cs_saved.c_value |
1078 | + fcn_aux_saved.x_sym.x_misc.x_fsize | |
b8fbeb18 | 1079 | + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)), |
c906108c | 1080 | #endif |
c5aa993b JM |
1081 | objfile |
1082 | ); | |
1083 | within_function = 0; | |
1084 | } | |
1085 | break; | |
c906108c | 1086 | |
c5aa993b JM |
1087 | case C_BLOCK: |
1088 | if (STREQ (cs->c_name, ".bb")) | |
1089 | { | |
1090 | tmpaddr = cs->c_value; | |
b8fbeb18 | 1091 | tmpaddr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1092 | push_context (++depth, tmpaddr); |
1093 | } | |
1094 | else if (STREQ (cs->c_name, ".eb")) | |
1095 | { | |
1096 | if (context_stack_depth <= 0) | |
1097 | { /* We attempted to pop an empty context stack */ | |
1098 | complain (&eb_stack_complaint, cs->c_symnum); | |
1099 | break; | |
1100 | } | |
c906108c | 1101 | |
c5aa993b JM |
1102 | new = pop_context (); |
1103 | if (depth-- != new->depth) | |
1104 | { | |
1105 | complain (&eb_complaint, symnum); | |
1106 | break; | |
1107 | } | |
1108 | if (local_symbols && context_stack_depth > 0) | |
1109 | { | |
1110 | tmpaddr = | |
b8fbeb18 | 1111 | cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1112 | /* Make a block for the local symbols within. */ |
1113 | finish_block (0, &local_symbols, new->old_blocks, | |
1114 | new->start_addr, tmpaddr, objfile); | |
1115 | } | |
1116 | /* Now pop locals of block just finished. */ | |
1117 | local_symbols = new->locals; | |
1118 | } | |
1119 | break; | |
c906108c | 1120 | |
c5aa993b | 1121 | default: |
96baa820 | 1122 | process_coff_symbol (cs, &main_aux, objfile); |
c5aa993b | 1123 | break; |
c906108c SS |
1124 | } |
1125 | } | |
1126 | ||
1127 | if (last_source_file) | |
1128 | coff_end_symtab (objfile); | |
1129 | ||
1130 | /* Patch up any opaque types (references to types that are not defined | |
1131 | in the file where they are referenced, e.g. "struct foo *bar"). */ | |
1132 | ALL_OBJFILE_SYMTABS (objfile, s) | |
1133 | patch_opaque_types (s); | |
1134 | ||
1135 | current_objfile = NULL; | |
1136 | } | |
1137 | \f | |
1138 | /* Routines for reading headers and symbols from executable. */ | |
1139 | ||
1140 | /* Read the next symbol, swap it, and return it in both internal_syment | |
1141 | form, and coff_symbol form. Also return its first auxent, if any, | |
1142 | in internal_auxent form, and skip any other auxents. */ | |
1143 | ||
1144 | static void | |
fba45db2 KB |
1145 | read_one_sym (register struct coff_symbol *cs, |
1146 | register struct internal_syment *sym, | |
1147 | register union internal_auxent *aux) | |
c906108c SS |
1148 | { |
1149 | int i; | |
1150 | ||
1151 | cs->c_symnum = symnum; | |
1152 | bfd_read (temp_sym, local_symesz, 1, nlist_bfd_global); | |
c5aa993b | 1153 | bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *) sym); |
c906108c SS |
1154 | cs->c_naux = sym->n_numaux & 0xff; |
1155 | if (cs->c_naux >= 1) | |
1156 | { | |
c906108c | 1157 | bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global); |
c5aa993b JM |
1158 | bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass, |
1159 | 0, cs->c_naux, (char *) aux); | |
1160 | /* If more than one aux entry, read past it (only the first aux | |
1161 | is important). */ | |
1162 | for (i = 1; i < cs->c_naux; i++) | |
1163 | bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global); | |
c906108c SS |
1164 | } |
1165 | cs->c_name = getsymname (sym); | |
1166 | cs->c_value = sym->n_value; | |
1167 | cs->c_sclass = (sym->n_sclass & 0xff); | |
1168 | cs->c_secnum = sym->n_scnum; | |
1169 | cs->c_type = (unsigned) sym->n_type; | |
1170 | if (!SDB_TYPE (cs->c_type)) | |
1171 | cs->c_type = 0; | |
1172 | ||
1173 | #if 0 | |
1174 | if (cs->c_sclass & 128) | |
c5aa993b | 1175 | printf ("thumb symbol %s, class 0x%x\n", cs->c_name, cs->c_sclass); |
c906108c SS |
1176 | #endif |
1177 | ||
1178 | symnum += 1 + cs->c_naux; | |
1179 | ||
1180 | /* The PE file format stores symbol values as offsets within the | |
1181 | section, rather than as absolute addresses. We correct that | |
1182 | here, if the symbol has an appropriate storage class. FIXME: We | |
1183 | should use BFD to read the symbols, rather than duplicating the | |
1184 | work here. */ | |
1185 | if (pe_file) | |
1186 | { | |
1187 | switch (cs->c_sclass) | |
1188 | { | |
1189 | case C_EXT: | |
1190 | case C_THUMBEXT: | |
1191 | case C_THUMBEXTFUNC: | |
1192 | case C_SECTION: | |
1193 | case C_NT_WEAK: | |
1194 | case C_STAT: | |
1195 | case C_THUMBSTAT: | |
1196 | case C_THUMBSTATFUNC: | |
1197 | case C_LABEL: | |
1198 | case C_THUMBLABEL: | |
1199 | case C_BLOCK: | |
1200 | case C_FCN: | |
1201 | case C_EFCN: | |
1202 | if (cs->c_secnum != 0) | |
1203 | cs->c_value += cs_section_address (cs, symfile_bfd); | |
1204 | break; | |
1205 | } | |
1206 | } | |
1207 | } | |
1208 | \f | |
1209 | /* Support for string table handling */ | |
1210 | ||
1211 | static char *stringtab = NULL; | |
1212 | ||
1213 | static int | |
fba45db2 | 1214 | init_stringtab (bfd *abfd, long offset) |
c906108c SS |
1215 | { |
1216 | long length; | |
1217 | int val; | |
1218 | unsigned char lengthbuf[4]; | |
1219 | ||
1220 | free_stringtab (); | |
1221 | ||
1222 | /* If the file is stripped, the offset might be zero, indicating no | |
1223 | string table. Just return with `stringtab' set to null. */ | |
1224 | if (offset == 0) | |
1225 | return 0; | |
1226 | ||
1227 | if (bfd_seek (abfd, offset, 0) < 0) | |
1228 | return -1; | |
1229 | ||
c5aa993b | 1230 | val = bfd_read ((char *) lengthbuf, sizeof lengthbuf, 1, abfd); |
c906108c | 1231 | length = bfd_h_get_32 (symfile_bfd, lengthbuf); |
c5aa993b | 1232 | |
c906108c SS |
1233 | /* If no string table is needed, then the file may end immediately |
1234 | after the symbols. Just return with `stringtab' set to null. */ | |
1235 | if (val != sizeof lengthbuf || length < sizeof lengthbuf) | |
1236 | return 0; | |
1237 | ||
1238 | stringtab = (char *) xmalloc (length); | |
1239 | /* This is in target format (probably not very useful, and not currently | |
1240 | used), not host format. */ | |
1241 | memcpy (stringtab, lengthbuf, sizeof lengthbuf); | |
c5aa993b | 1242 | if (length == sizeof length) /* Empty table -- just the count */ |
c906108c SS |
1243 | return 0; |
1244 | ||
1245 | val = bfd_read (stringtab + sizeof lengthbuf, length - sizeof lengthbuf, 1, abfd); | |
1246 | if (val != length - sizeof lengthbuf || stringtab[length - 1] != '\0') | |
1247 | return -1; | |
1248 | ||
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | static void | |
fba45db2 | 1253 | free_stringtab (void) |
c906108c SS |
1254 | { |
1255 | if (stringtab) | |
b8c9b27d | 1256 | xfree (stringtab); |
c906108c SS |
1257 | stringtab = NULL; |
1258 | } | |
1259 | ||
74b7792f AC |
1260 | static void |
1261 | free_stringtab_cleanup (void *ignore) | |
1262 | { | |
1263 | free_stringtab (); | |
1264 | } | |
1265 | ||
c906108c | 1266 | static char * |
fba45db2 | 1267 | getsymname (struct internal_syment *symbol_entry) |
c906108c | 1268 | { |
c5aa993b | 1269 | static char buffer[SYMNMLEN + 1]; |
c906108c SS |
1270 | char *result; |
1271 | ||
1272 | if (symbol_entry->_n._n_n._n_zeroes == 0) | |
1273 | { | |
1274 | /* FIXME: Probably should be detecting corrupt symbol files by | |
c5aa993b | 1275 | seeing whether offset points to within the stringtab. */ |
c906108c SS |
1276 | result = stringtab + symbol_entry->_n._n_n._n_offset; |
1277 | } | |
1278 | else | |
1279 | { | |
1280 | strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN); | |
1281 | buffer[SYMNMLEN] = '\0'; | |
1282 | result = buffer; | |
1283 | } | |
1284 | return result; | |
1285 | } | |
1286 | ||
1287 | /* Extract the file name from the aux entry of a C_FILE symbol. Return | |
1288 | only the last component of the name. Result is in static storage and | |
1289 | is only good for temporary use. */ | |
1290 | ||
1291 | static char * | |
fba45db2 | 1292 | coff_getfilename (union internal_auxent *aux_entry) |
c906108c SS |
1293 | { |
1294 | static char buffer[BUFSIZ]; | |
1295 | register char *temp; | |
1296 | char *result; | |
1297 | ||
1298 | if (aux_entry->x_file.x_n.x_zeroes == 0) | |
1299 | strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); | |
1300 | else | |
1301 | { | |
1302 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); | |
1303 | buffer[FILNMLEN] = '\0'; | |
1304 | } | |
1305 | result = buffer; | |
1306 | ||
1307 | /* FIXME: We should not be throwing away the information about what | |
1308 | directory. It should go into dirname of the symtab, or some such | |
1309 | place. */ | |
1310 | if ((temp = strrchr (result, '/')) != NULL) | |
1311 | result = temp + 1; | |
1312 | return (result); | |
1313 | } | |
1314 | \f | |
1315 | /* Support for line number handling. */ | |
1316 | ||
1317 | static char *linetab = NULL; | |
1318 | static long linetab_offset; | |
1319 | static unsigned long linetab_size; | |
1320 | ||
1321 | /* Read in all the line numbers for fast lookups later. Leave them in | |
1322 | external (unswapped) format in memory; we'll swap them as we enter | |
1323 | them into GDB's data structures. */ | |
c5aa993b | 1324 | |
c906108c | 1325 | static int |
fba45db2 | 1326 | init_lineno (bfd *abfd, long offset, int size) |
c906108c SS |
1327 | { |
1328 | int val; | |
1329 | ||
1330 | linetab_offset = offset; | |
1331 | linetab_size = size; | |
1332 | ||
c5aa993b | 1333 | free_linetab (); |
c906108c SS |
1334 | |
1335 | if (size == 0) | |
1336 | return 0; | |
1337 | ||
1338 | if (bfd_seek (abfd, offset, 0) < 0) | |
1339 | return -1; | |
c5aa993b | 1340 | |
c906108c SS |
1341 | /* Allocate the desired table, plus a sentinel */ |
1342 | linetab = (char *) xmalloc (size + local_linesz); | |
1343 | ||
1344 | val = bfd_read (linetab, size, 1, abfd); | |
1345 | if (val != size) | |
1346 | return -1; | |
1347 | ||
1348 | /* Terminate it with an all-zero sentinel record */ | |
1349 | memset (linetab + size, 0, local_linesz); | |
1350 | ||
1351 | return 0; | |
1352 | } | |
1353 | ||
1354 | static void | |
fba45db2 | 1355 | free_linetab (void) |
c906108c SS |
1356 | { |
1357 | if (linetab) | |
b8c9b27d | 1358 | xfree (linetab); |
c906108c SS |
1359 | linetab = NULL; |
1360 | } | |
1361 | ||
74b7792f AC |
1362 | static void |
1363 | free_linetab_cleanup (void *ignore) | |
1364 | { | |
1365 | free_linetab (); | |
1366 | } | |
1367 | ||
c906108c SS |
1368 | #if !defined (L_LNNO32) |
1369 | #define L_LNNO32(lp) ((lp)->l_lnno) | |
1370 | #endif | |
1371 | ||
1372 | static void | |
fba45db2 KB |
1373 | enter_linenos (long file_offset, register int first_line, |
1374 | register int last_line, struct objfile *objfile) | |
c906108c SS |
1375 | { |
1376 | register char *rawptr; | |
1377 | struct internal_lineno lptr; | |
1378 | ||
1379 | if (!linetab) | |
c5aa993b | 1380 | return; |
c906108c SS |
1381 | if (file_offset < linetab_offset) |
1382 | { | |
1383 | complain (&lineno_complaint, file_offset); | |
1384 | if (file_offset > linetab_size) /* Too big to be an offset? */ | |
1385 | return; | |
c5aa993b | 1386 | file_offset += linetab_offset; /* Try reading at that linetab offset */ |
c906108c | 1387 | } |
c5aa993b | 1388 | |
c906108c SS |
1389 | rawptr = &linetab[file_offset - linetab_offset]; |
1390 | ||
1391 | /* skip first line entry for each function */ | |
1392 | rawptr += local_linesz; | |
1393 | /* line numbers start at one for the first line of the function */ | |
1394 | first_line--; | |
1395 | ||
c5aa993b JM |
1396 | for (;;) |
1397 | { | |
1398 | bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr); | |
1399 | rawptr += local_linesz; | |
1400 | /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */ | |
1401 | if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line) | |
1402 | record_line (current_subfile, first_line + L_LNNO32 (&lptr), | |
1403 | lptr.l_addr.l_paddr | |
b8fbeb18 | 1404 | + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile))); |
c5aa993b JM |
1405 | else |
1406 | break; | |
1407 | } | |
c906108c SS |
1408 | } |
1409 | \f | |
1410 | static void | |
fba45db2 | 1411 | patch_type (struct type *type, struct type *real_type) |
c906108c SS |
1412 | { |
1413 | register struct type *target = TYPE_TARGET_TYPE (type); | |
1414 | register struct type *real_target = TYPE_TARGET_TYPE (real_type); | |
1415 | int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); | |
1416 | ||
1417 | TYPE_LENGTH (target) = TYPE_LENGTH (real_target); | |
1418 | TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); | |
1419 | TYPE_FIELDS (target) = (struct field *) TYPE_ALLOC (target, field_size); | |
1420 | ||
1421 | memcpy (TYPE_FIELDS (target), TYPE_FIELDS (real_target), field_size); | |
1422 | ||
1423 | if (TYPE_NAME (real_target)) | |
1424 | { | |
1425 | if (TYPE_NAME (target)) | |
b8c9b27d | 1426 | xfree (TYPE_NAME (target)); |
c906108c SS |
1427 | TYPE_NAME (target) = concat (TYPE_NAME (real_target), NULL); |
1428 | } | |
1429 | } | |
1430 | ||
1431 | /* Patch up all appropriate typedef symbols in the opaque_type_chains | |
1432 | so that they can be used to print out opaque data structures properly. */ | |
1433 | ||
1434 | static void | |
fba45db2 | 1435 | patch_opaque_types (struct symtab *s) |
c906108c SS |
1436 | { |
1437 | register struct block *b; | |
1438 | register int i; | |
1439 | register struct symbol *real_sym; | |
c5aa993b | 1440 | |
c906108c SS |
1441 | /* Go through the per-file symbols only */ |
1442 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); | |
1443 | for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--) | |
1444 | { | |
1445 | /* Find completed typedefs to use to fix opaque ones. | |
c5aa993b JM |
1446 | Remove syms from the chain when their types are stored, |
1447 | but search the whole chain, as there may be several syms | |
1448 | from different files with the same name. */ | |
c906108c SS |
1449 | real_sym = BLOCK_SYM (b, i); |
1450 | if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF && | |
1451 | SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE && | |
1452 | TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR && | |
1453 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) | |
1454 | { | |
1455 | register char *name = SYMBOL_NAME (real_sym); | |
1456 | register int hash = hashname (name); | |
1457 | register struct symbol *sym, *prev; | |
c5aa993b | 1458 | |
c906108c SS |
1459 | prev = 0; |
1460 | for (sym = opaque_type_chain[hash]; sym;) | |
1461 | { | |
1462 | if (name[0] == SYMBOL_NAME (sym)[0] && | |
1463 | STREQ (name + 1, SYMBOL_NAME (sym) + 1)) | |
1464 | { | |
1465 | if (prev) | |
1466 | { | |
1467 | SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); | |
1468 | } | |
1469 | else | |
1470 | { | |
1471 | opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); | |
1472 | } | |
c5aa993b | 1473 | |
c906108c | 1474 | patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); |
c5aa993b | 1475 | |
c906108c SS |
1476 | if (prev) |
1477 | { | |
1478 | sym = SYMBOL_VALUE_CHAIN (prev); | |
1479 | } | |
1480 | else | |
1481 | { | |
1482 | sym = opaque_type_chain[hash]; | |
1483 | } | |
1484 | } | |
1485 | else | |
1486 | { | |
1487 | prev = sym; | |
1488 | sym = SYMBOL_VALUE_CHAIN (sym); | |
1489 | } | |
1490 | } | |
1491 | } | |
1492 | } | |
1493 | } | |
1494 | \f | |
1495 | static struct symbol * | |
fba45db2 KB |
1496 | process_coff_symbol (register struct coff_symbol *cs, |
1497 | register union internal_auxent *aux, | |
1498 | struct objfile *objfile) | |
c906108c SS |
1499 | { |
1500 | register struct symbol *sym | |
c5aa993b JM |
1501 | = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
1502 | sizeof (struct symbol)); | |
c906108c SS |
1503 | char *name; |
1504 | ||
1505 | memset (sym, 0, sizeof (struct symbol)); | |
1506 | name = cs->c_name; | |
1507 | name = EXTERNAL_NAME (name, objfile->obfd); | |
1508 | SYMBOL_NAME (sym) = obsavestring (name, strlen (name), | |
1509 | &objfile->symbol_obstack); | |
1510 | SYMBOL_LANGUAGE (sym) = language_auto; | |
1511 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); | |
1512 | ||
1513 | /* default assumptions */ | |
1514 | SYMBOL_VALUE (sym) = cs->c_value; | |
1515 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1516 | SYMBOL_SECTION (sym) = cs_to_section (cs, objfile); | |
1517 | ||
1518 | if (ISFCN (cs->c_type)) | |
1519 | { | |
b8fbeb18 | 1520 | SYMBOL_VALUE (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1521 | SYMBOL_TYPE (sym) = |
1522 | lookup_function_type (decode_function_type (cs, cs->c_type, aux)); | |
c906108c SS |
1523 | |
1524 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
1525 | if (cs->c_sclass == C_STAT || cs->c_sclass == C_THUMBSTAT | |
1526 | || cs->c_sclass == C_THUMBSTATFUNC) | |
1527 | add_symbol_to_list (sym, &file_symbols); | |
1528 | else if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT | |
1529 | || cs->c_sclass == C_THUMBEXTFUNC) | |
1530 | add_symbol_to_list (sym, &global_symbols); | |
1531 | } | |
1532 | else | |
1533 | { | |
1534 | SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux); | |
1535 | switch (cs->c_sclass) | |
1536 | { | |
c5aa993b JM |
1537 | case C_NULL: |
1538 | break; | |
c906108c | 1539 | |
c5aa993b JM |
1540 | case C_AUTO: |
1541 | SYMBOL_CLASS (sym) = LOC_LOCAL; | |
1542 | add_symbol_to_list (sym, &local_symbols); | |
1543 | break; | |
c906108c | 1544 | |
c5aa993b JM |
1545 | case C_THUMBEXT: |
1546 | case C_THUMBEXTFUNC: | |
1547 | case C_EXT: | |
1548 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1549 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
b8fbeb18 | 1550 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1551 | add_symbol_to_list (sym, &global_symbols); |
1552 | break; | |
c906108c | 1553 | |
c5aa993b JM |
1554 | case C_THUMBSTAT: |
1555 | case C_THUMBSTATFUNC: | |
1556 | case C_STAT: | |
1557 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1558 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
b8fbeb18 | 1559 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1560 | if (within_function) |
1561 | { | |
c906108c SS |
1562 | /* Static symbol of local scope */ |
1563 | add_symbol_to_list (sym, &local_symbols); | |
1564 | } | |
c5aa993b JM |
1565 | else |
1566 | { | |
c906108c SS |
1567 | /* Static symbol at top level of file */ |
1568 | add_symbol_to_list (sym, &file_symbols); | |
1569 | } | |
c5aa993b | 1570 | break; |
c906108c SS |
1571 | |
1572 | #ifdef C_GLBLREG /* AMD coff */ | |
c5aa993b | 1573 | case C_GLBLREG: |
c906108c | 1574 | #endif |
c5aa993b JM |
1575 | case C_REG: |
1576 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
1577 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM (cs->c_value); | |
1578 | add_symbol_to_list (sym, &local_symbols); | |
1579 | break; | |
c906108c | 1580 | |
c5aa993b JM |
1581 | case C_THUMBLABEL: |
1582 | case C_LABEL: | |
1583 | break; | |
c906108c | 1584 | |
c5aa993b JM |
1585 | case C_ARG: |
1586 | SYMBOL_CLASS (sym) = LOC_ARG; | |
1587 | add_symbol_to_list (sym, &local_symbols); | |
c906108c | 1588 | #if !defined (BELIEVE_PCC_PROMOTION) |
c5aa993b JM |
1589 | if (TARGET_BYTE_ORDER == BIG_ENDIAN) |
1590 | { | |
1591 | /* If PCC says a parameter is a short or a char, | |
1592 | aligned on an int boundary, realign it to the | |
1593 | "little end" of the int. */ | |
1594 | struct type *temptype; | |
1595 | temptype = lookup_fundamental_type (current_objfile, | |
1596 | FT_INTEGER); | |
1597 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) | |
1598 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT | |
1599 | && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (temptype)) | |
1600 | { | |
1601 | SYMBOL_VALUE (sym) += | |
1602 | TYPE_LENGTH (temptype) | |
1603 | - TYPE_LENGTH (SYMBOL_TYPE (sym)); | |
1604 | } | |
1605 | } | |
c906108c | 1606 | #endif |
c5aa993b | 1607 | break; |
c906108c | 1608 | |
c5aa993b JM |
1609 | case C_REGPARM: |
1610 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
1611 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM (cs->c_value); | |
1612 | add_symbol_to_list (sym, &local_symbols); | |
c906108c | 1613 | #if !defined (BELIEVE_PCC_PROMOTION) |
c5aa993b JM |
1614 | /* FIXME: This should retain the current type, since it's just |
1615 | a register value. gnu@adobe, 26Feb93 */ | |
1616 | { | |
1617 | /* If PCC says a parameter is a short or a char, | |
1618 | it is really an int. */ | |
1619 | struct type *temptype; | |
1620 | temptype = | |
1621 | lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1622 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) | |
1623 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT) | |
c906108c | 1624 | { |
c5aa993b JM |
1625 | SYMBOL_TYPE (sym) = |
1626 | (TYPE_UNSIGNED (SYMBOL_TYPE (sym)) | |
1627 | ? lookup_fundamental_type (current_objfile, | |
1628 | FT_UNSIGNED_INTEGER) | |
1629 | : temptype); | |
c906108c | 1630 | } |
c5aa993b | 1631 | } |
c906108c | 1632 | #endif |
c5aa993b | 1633 | break; |
c906108c | 1634 | |
c5aa993b JM |
1635 | case C_TPDEF: |
1636 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1637 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1638 | ||
1639 | /* If type has no name, give it one */ | |
1640 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
1641 | { | |
1642 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR | |
1643 | || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC) | |
1644 | { | |
1645 | /* If we are giving a name to a type such as "pointer to | |
1646 | foo" or "function returning foo", we better not set | |
1647 | the TYPE_NAME. If the program contains "typedef char | |
1648 | *caddr_t;", we don't want all variables of type char | |
1649 | * to print as caddr_t. This is not just a | |
1650 | consequence of GDB's type management; CC and GCC (at | |
1651 | least through version 2.4) both output variables of | |
1652 | either type char * or caddr_t with the type | |
1653 | refering to the C_TPDEF symbol for caddr_t. If a future | |
1654 | compiler cleans this up it GDB is not ready for it | |
1655 | yet, but if it becomes ready we somehow need to | |
1656 | disable this check (without breaking the PCC/GCC2.4 | |
1657 | case). | |
1658 | ||
1659 | Sigh. | |
1660 | ||
1661 | Fortunately, this check seems not to be necessary | |
1662 | for anything except pointers or functions. */ | |
1663 | ; | |
1664 | } | |
1665 | else | |
1666 | TYPE_NAME (SYMBOL_TYPE (sym)) = | |
1667 | concat (SYMBOL_NAME (sym), NULL); | |
1668 | } | |
c906108c | 1669 | #ifdef CXUX_TARGET |
c5aa993b JM |
1670 | /* Ignore vendor section for Harris CX/UX targets. */ |
1671 | else if (cs->c_name[0] == '$') | |
1672 | break; | |
c906108c SS |
1673 | #endif /* CXUX_TARGET */ |
1674 | ||
c5aa993b JM |
1675 | /* Keep track of any type which points to empty structured type, |
1676 | so it can be filled from a definition from another file. A | |
1677 | simple forward reference (TYPE_CODE_UNDEF) is not an | |
1678 | empty structured type, though; the forward references | |
1679 | work themselves out via the magic of coff_lookup_type. */ | |
1680 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && | |
1681 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0 && | |
1682 | TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) != | |
1683 | TYPE_CODE_UNDEF) | |
1684 | { | |
1685 | register int i = hashname (SYMBOL_NAME (sym)); | |
c906108c | 1686 | |
c5aa993b JM |
1687 | SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; |
1688 | opaque_type_chain[i] = sym; | |
1689 | } | |
1690 | add_symbol_to_list (sym, &file_symbols); | |
1691 | break; | |
c906108c | 1692 | |
c5aa993b JM |
1693 | case C_STRTAG: |
1694 | case C_UNTAG: | |
1695 | case C_ENTAG: | |
1696 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1697 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
1698 | ||
1699 | /* Some compilers try to be helpful by inventing "fake" | |
1700 | names for anonymous enums, structures, and unions, like | |
1701 | "~0fake" or ".0fake". Thanks, but no thanks... */ | |
1702 | if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0) | |
1703 | if (SYMBOL_NAME (sym) != NULL | |
1704 | && *SYMBOL_NAME (sym) != '~' | |
1705 | && *SYMBOL_NAME (sym) != '.') | |
1706 | TYPE_TAG_NAME (SYMBOL_TYPE (sym)) = | |
1707 | concat (SYMBOL_NAME (sym), NULL); | |
1708 | ||
1709 | add_symbol_to_list (sym, &file_symbols); | |
1710 | break; | |
c906108c | 1711 | |
c5aa993b JM |
1712 | default: |
1713 | break; | |
c906108c SS |
1714 | } |
1715 | } | |
1716 | return sym; | |
1717 | } | |
1718 | \f | |
1719 | /* Decode a coff type specifier; return the type that is meant. */ | |
1720 | ||
1721 | static struct type * | |
fba45db2 KB |
1722 | decode_type (register struct coff_symbol *cs, unsigned int c_type, |
1723 | register union internal_auxent *aux) | |
c906108c SS |
1724 | { |
1725 | register struct type *type = 0; | |
1726 | unsigned int new_c_type; | |
1727 | ||
1728 | if (c_type & ~N_BTMASK) | |
1729 | { | |
1730 | new_c_type = DECREF (c_type); | |
1731 | if (ISPTR (c_type)) | |
1732 | { | |
1733 | type = decode_type (cs, new_c_type, aux); | |
1734 | type = lookup_pointer_type (type); | |
1735 | } | |
1736 | else if (ISFCN (c_type)) | |
1737 | { | |
1738 | type = decode_type (cs, new_c_type, aux); | |
1739 | type = lookup_function_type (type); | |
1740 | } | |
1741 | else if (ISARY (c_type)) | |
1742 | { | |
1743 | int i, n; | |
1744 | register unsigned short *dim; | |
1745 | struct type *base_type, *index_type, *range_type; | |
1746 | ||
1747 | /* Define an array type. */ | |
1748 | /* auxent refers to array, not base type */ | |
1749 | if (aux->x_sym.x_tagndx.l == 0) | |
1750 | cs->c_naux = 0; | |
1751 | ||
1752 | /* shift the indices down */ | |
1753 | dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; | |
1754 | i = 1; | |
1755 | n = dim[0]; | |
1756 | for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) | |
1757 | *dim = *(dim + 1); | |
1758 | *dim = 0; | |
1759 | ||
1760 | base_type = decode_type (cs, new_c_type, aux); | |
1761 | index_type = lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1762 | range_type = | |
1763 | create_range_type ((struct type *) NULL, index_type, 0, n - 1); | |
1764 | type = | |
1765 | create_array_type ((struct type *) NULL, base_type, range_type); | |
1766 | } | |
1767 | return type; | |
1768 | } | |
1769 | ||
1770 | /* Reference to existing type. This only occurs with the | |
1771 | struct, union, and enum types. EPI a29k coff | |
1772 | fakes us out by producing aux entries with a nonzero | |
1773 | x_tagndx for definitions of structs, unions, and enums, so we | |
1774 | have to check the c_sclass field. SCO 3.2v4 cc gets confused | |
1775 | with pointers to pointers to defined structs, and generates | |
1776 | negative x_tagndx fields. */ | |
1777 | if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0) | |
1778 | { | |
1779 | if (cs->c_sclass != C_STRTAG | |
1780 | && cs->c_sclass != C_UNTAG | |
1781 | && cs->c_sclass != C_ENTAG | |
1782 | && aux->x_sym.x_tagndx.l >= 0) | |
1783 | { | |
1784 | type = coff_alloc_type (aux->x_sym.x_tagndx.l); | |
1785 | return type; | |
1786 | } | |
1787 | else | |
1788 | { | |
1789 | complain (&tagndx_bad_complaint, cs->c_name); | |
1790 | /* And fall through to decode_base_type... */ | |
1791 | } | |
1792 | } | |
1793 | ||
1794 | return decode_base_type (cs, BTYPE (c_type), aux); | |
1795 | } | |
1796 | ||
1797 | /* Decode a coff type specifier for function definition; | |
1798 | return the type that the function returns. */ | |
1799 | ||
1800 | static struct type * | |
fba45db2 KB |
1801 | decode_function_type (register struct coff_symbol *cs, unsigned int c_type, |
1802 | register union internal_auxent *aux) | |
c906108c SS |
1803 | { |
1804 | if (aux->x_sym.x_tagndx.l == 0) | |
c5aa993b | 1805 | cs->c_naux = 0; /* auxent refers to function, not base type */ |
c906108c SS |
1806 | |
1807 | return decode_type (cs, DECREF (c_type), aux); | |
1808 | } | |
1809 | \f | |
1810 | /* basic C types */ | |
1811 | ||
1812 | static struct type * | |
fba45db2 KB |
1813 | decode_base_type (register struct coff_symbol *cs, unsigned int c_type, |
1814 | register union internal_auxent *aux) | |
c906108c SS |
1815 | { |
1816 | struct type *type; | |
1817 | ||
1818 | switch (c_type) | |
1819 | { | |
c5aa993b JM |
1820 | case T_NULL: |
1821 | /* shows up with "void (*foo)();" structure members */ | |
1822 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
c906108c SS |
1823 | |
1824 | #if 0 | |
1825 | /* DGUX actually defines both T_ARG and T_VOID to the same value. */ | |
1826 | #ifdef T_ARG | |
c5aa993b JM |
1827 | case T_ARG: |
1828 | /* Shows up in DGUX, I think. Not sure where. */ | |
1829 | return lookup_fundamental_type (current_objfile, FT_VOID); /* shouldn't show up here */ | |
c906108c SS |
1830 | #endif |
1831 | #endif /* 0 */ | |
1832 | ||
1833 | #ifdef T_VOID | |
c5aa993b JM |
1834 | case T_VOID: |
1835 | /* Intel 960 COFF has this symbol and meaning. */ | |
1836 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
c906108c SS |
1837 | #endif |
1838 | ||
c5aa993b JM |
1839 | case T_CHAR: |
1840 | return lookup_fundamental_type (current_objfile, FT_CHAR); | |
c906108c | 1841 | |
c5aa993b JM |
1842 | case T_SHORT: |
1843 | return lookup_fundamental_type (current_objfile, FT_SHORT); | |
c906108c | 1844 | |
c5aa993b JM |
1845 | case T_INT: |
1846 | return lookup_fundamental_type (current_objfile, FT_INTEGER); | |
c906108c | 1847 | |
c5aa993b JM |
1848 | case T_LONG: |
1849 | if (cs->c_sclass == C_FIELD | |
1850 | && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) | |
1851 | return lookup_fundamental_type (current_objfile, FT_LONG_LONG); | |
1852 | else | |
1853 | return lookup_fundamental_type (current_objfile, FT_LONG); | |
c906108c | 1854 | |
c5aa993b JM |
1855 | case T_FLOAT: |
1856 | return lookup_fundamental_type (current_objfile, FT_FLOAT); | |
c906108c | 1857 | |
c5aa993b JM |
1858 | case T_DOUBLE: |
1859 | return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); | |
c906108c | 1860 | |
c5aa993b JM |
1861 | case T_LNGDBL: |
1862 | return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); | |
c906108c | 1863 | |
c5aa993b JM |
1864 | case T_STRUCT: |
1865 | if (cs->c_naux != 1) | |
1866 | { | |
1867 | /* anonymous structure type */ | |
1868 | type = coff_alloc_type (cs->c_symnum); | |
1869 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1870 | TYPE_NAME (type) = NULL; | |
1871 | /* This used to set the tag to "<opaque>". But I think setting it | |
1872 | to NULL is right, and the printing code can print it as | |
1873 | "struct {...}". */ | |
1874 | TYPE_TAG_NAME (type) = NULL; | |
1875 | INIT_CPLUS_SPECIFIC (type); | |
1876 | TYPE_LENGTH (type) = 0; | |
1877 | TYPE_FIELDS (type) = 0; | |
1878 | TYPE_NFIELDS (type) = 0; | |
1879 | } | |
1880 | else | |
1881 | { | |
1882 | type = coff_read_struct_type (cs->c_symnum, | |
1883 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1884 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
1885 | } | |
1886 | return type; | |
c906108c | 1887 | |
c5aa993b JM |
1888 | case T_UNION: |
1889 | if (cs->c_naux != 1) | |
1890 | { | |
1891 | /* anonymous union type */ | |
1892 | type = coff_alloc_type (cs->c_symnum); | |
1893 | TYPE_NAME (type) = NULL; | |
1894 | /* This used to set the tag to "<opaque>". But I think setting it | |
1895 | to NULL is right, and the printing code can print it as | |
1896 | "union {...}". */ | |
1897 | TYPE_TAG_NAME (type) = NULL; | |
1898 | INIT_CPLUS_SPECIFIC (type); | |
1899 | TYPE_LENGTH (type) = 0; | |
1900 | TYPE_FIELDS (type) = 0; | |
1901 | TYPE_NFIELDS (type) = 0; | |
1902 | } | |
1903 | else | |
1904 | { | |
1905 | type = coff_read_struct_type (cs->c_symnum, | |
c906108c | 1906 | aux->x_sym.x_misc.x_lnsz.x_size, |
c5aa993b JM |
1907 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); |
1908 | } | |
1909 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1910 | return type; | |
c906108c | 1911 | |
c5aa993b JM |
1912 | case T_ENUM: |
1913 | if (cs->c_naux != 1) | |
1914 | { | |
1915 | /* anonymous enum type */ | |
1916 | type = coff_alloc_type (cs->c_symnum); | |
1917 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
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 | "enum {...}". */ | |
1922 | TYPE_TAG_NAME (type) = NULL; | |
1923 | TYPE_LENGTH (type) = 0; | |
1924 | TYPE_FIELDS (type) = 0; | |
1925 | TYPE_NFIELDS (type) = 0; | |
1926 | } | |
1927 | else | |
1928 | { | |
1929 | type = coff_read_enum_type (cs->c_symnum, | |
1930 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1931 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
1932 | } | |
1933 | return type; | |
1934 | ||
1935 | case T_MOE: | |
1936 | /* shouldn't show up here */ | |
1937 | break; | |
c906108c | 1938 | |
c5aa993b JM |
1939 | case T_UCHAR: |
1940 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); | |
c906108c | 1941 | |
c5aa993b JM |
1942 | case T_USHORT: |
1943 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); | |
c906108c | 1944 | |
c5aa993b JM |
1945 | case T_UINT: |
1946 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); | |
c906108c | 1947 | |
c5aa993b JM |
1948 | case T_ULONG: |
1949 | if (cs->c_sclass == C_FIELD | |
1950 | && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) | |
1951 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); | |
1952 | else | |
1953 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG); | |
c906108c SS |
1954 | } |
1955 | complain (&unexpected_type_complaint, cs->c_name); | |
1956 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
1957 | } | |
1958 | \f | |
1959 | /* This page contains subroutines of read_type. */ | |
1960 | ||
1961 | /* Read the description of a structure (or union type) and return an | |
1962 | object describing the type. */ | |
1963 | ||
1964 | static struct type * | |
fba45db2 | 1965 | coff_read_struct_type (int index, int length, int lastsym) |
c906108c SS |
1966 | { |
1967 | struct nextfield | |
1968 | { | |
1969 | struct nextfield *next; | |
1970 | struct field field; | |
1971 | }; | |
1972 | ||
1973 | register struct type *type; | |
1974 | register struct nextfield *list = 0; | |
1975 | struct nextfield *new; | |
1976 | int nfields = 0; | |
1977 | register int n; | |
1978 | char *name; | |
1979 | struct coff_symbol member_sym; | |
1980 | register struct coff_symbol *ms = &member_sym; | |
1981 | struct internal_syment sub_sym; | |
1982 | union internal_auxent sub_aux; | |
1983 | int done = 0; | |
1984 | ||
1985 | type = coff_alloc_type (index); | |
1986 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
c5aa993b | 1987 | INIT_CPLUS_SPECIFIC (type); |
c906108c SS |
1988 | TYPE_LENGTH (type) = length; |
1989 | ||
1990 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
1991 | { | |
1992 | read_one_sym (ms, &sub_sym, &sub_aux); | |
1993 | name = ms->c_name; | |
1994 | name = EXTERNAL_NAME (name, current_objfile->obfd); | |
1995 | ||
1996 | switch (ms->c_sclass) | |
1997 | { | |
c5aa993b JM |
1998 | case C_MOS: |
1999 | case C_MOU: | |
2000 | ||
2001 | /* Get space to record the next field's data. */ | |
2002 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
2003 | new->next = list; | |
2004 | list = new; | |
2005 | ||
2006 | /* Save the data. */ | |
2007 | list->field.name = | |
2008 | obsavestring (name, | |
2009 | strlen (name), | |
2010 | ¤t_objfile->symbol_obstack); | |
2011 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); | |
2012 | FIELD_BITPOS (list->field) = 8 * ms->c_value; | |
2013 | FIELD_BITSIZE (list->field) = 0; | |
2014 | nfields++; | |
2015 | break; | |
c906108c | 2016 | |
c5aa993b JM |
2017 | case C_FIELD: |
2018 | ||
2019 | /* Get space to record the next field's data. */ | |
2020 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
2021 | new->next = list; | |
2022 | list = new; | |
2023 | ||
2024 | /* Save the data. */ | |
2025 | list->field.name = | |
2026 | obsavestring (name, | |
2027 | strlen (name), | |
2028 | ¤t_objfile->symbol_obstack); | |
2029 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); | |
2030 | FIELD_BITPOS (list->field) = ms->c_value; | |
2031 | FIELD_BITSIZE (list->field) = sub_aux.x_sym.x_misc.x_lnsz.x_size; | |
2032 | nfields++; | |
2033 | break; | |
c906108c | 2034 | |
c5aa993b JM |
2035 | case C_EOS: |
2036 | done = 1; | |
2037 | break; | |
c906108c SS |
2038 | } |
2039 | } | |
2040 | /* Now create the vector of fields, and record how big it is. */ | |
2041 | ||
2042 | TYPE_NFIELDS (type) = nfields; | |
2043 | TYPE_FIELDS (type) = (struct field *) | |
2044 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
2045 | ||
2046 | /* Copy the saved-up fields into the field vector. */ | |
2047 | ||
2048 | for (n = nfields; list; list = list->next) | |
2049 | TYPE_FIELD (type, --n) = list->field; | |
2050 | ||
2051 | return type; | |
2052 | } | |
2053 | \f | |
2054 | /* Read a definition of an enumeration type, | |
2055 | and create and return a suitable type object. | |
2056 | Also defines the symbols that represent the values of the type. */ | |
2057 | ||
2058 | /* ARGSUSED */ | |
2059 | static struct type * | |
fba45db2 | 2060 | coff_read_enum_type (int index, int length, int lastsym) |
c906108c SS |
2061 | { |
2062 | register struct symbol *sym; | |
2063 | register struct type *type; | |
2064 | int nsyms = 0; | |
2065 | int done = 0; | |
2066 | struct pending **symlist; | |
2067 | struct coff_symbol member_sym; | |
2068 | register struct coff_symbol *ms = &member_sym; | |
2069 | struct internal_syment sub_sym; | |
2070 | union internal_auxent sub_aux; | |
2071 | struct pending *osyms, *syms; | |
2072 | int o_nsyms; | |
2073 | register int n; | |
2074 | char *name; | |
2075 | int unsigned_enum = 1; | |
2076 | ||
2077 | type = coff_alloc_type (index); | |
2078 | if (within_function) | |
2079 | symlist = &local_symbols; | |
2080 | else | |
2081 | symlist = &file_symbols; | |
2082 | osyms = *symlist; | |
2083 | o_nsyms = osyms ? osyms->nsyms : 0; | |
2084 | ||
2085 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
2086 | { | |
2087 | read_one_sym (ms, &sub_sym, &sub_aux); | |
2088 | name = ms->c_name; | |
2089 | name = EXTERNAL_NAME (name, current_objfile->obfd); | |
2090 | ||
2091 | switch (ms->c_sclass) | |
2092 | { | |
c5aa993b JM |
2093 | case C_MOE: |
2094 | sym = (struct symbol *) obstack_alloc | |
2095 | (¤t_objfile->symbol_obstack, | |
2096 | sizeof (struct symbol)); | |
2097 | memset (sym, 0, sizeof (struct symbol)); | |
2098 | ||
2099 | SYMBOL_NAME (sym) = | |
2100 | obsavestring (name, strlen (name), | |
2101 | ¤t_objfile->symbol_obstack); | |
2102 | SYMBOL_CLASS (sym) = LOC_CONST; | |
2103 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2104 | SYMBOL_VALUE (sym) = ms->c_value; | |
2105 | add_symbol_to_list (sym, symlist); | |
2106 | nsyms++; | |
2107 | break; | |
c906108c | 2108 | |
c5aa993b JM |
2109 | case C_EOS: |
2110 | /* Sometimes the linker (on 386/ix 2.0.2 at least) screws | |
2111 | up the count of how many symbols to read. So stop | |
2112 | on .eos. */ | |
2113 | done = 1; | |
2114 | break; | |
c906108c SS |
2115 | } |
2116 | } | |
2117 | ||
2118 | /* Now fill in the fields of the type-structure. */ | |
2119 | ||
2120 | if (length > 0) | |
2121 | TYPE_LENGTH (type) = length; | |
2122 | else | |
c5aa993b | 2123 | TYPE_LENGTH (type) = TARGET_INT_BIT / TARGET_CHAR_BIT; /* Assume ints */ |
c906108c SS |
2124 | TYPE_CODE (type) = TYPE_CODE_ENUM; |
2125 | TYPE_NFIELDS (type) = nsyms; | |
2126 | TYPE_FIELDS (type) = (struct field *) | |
2127 | TYPE_ALLOC (type, sizeof (struct field) * nsyms); | |
2128 | ||
2129 | /* Find the symbols for the values and put them into the type. | |
2130 | The symbols can be found in the symlist that we put them on | |
2131 | to cause them to be defined. osyms contains the old value | |
2132 | of that symlist; everything up to there was defined by us. */ | |
2133 | /* Note that we preserve the order of the enum constants, so | |
2134 | that in something like "enum {FOO, LAST_THING=FOO}" we print | |
2135 | FOO, not LAST_THING. */ | |
2136 | ||
2137 | for (syms = *symlist, n = 0; syms; syms = syms->next) | |
2138 | { | |
2139 | int j = 0; | |
2140 | ||
2141 | if (syms == osyms) | |
2142 | j = o_nsyms; | |
c5aa993b | 2143 | for (; j < syms->nsyms; j++, n++) |
c906108c SS |
2144 | { |
2145 | struct symbol *xsym = syms->symbol[j]; | |
2146 | SYMBOL_TYPE (xsym) = type; | |
2147 | TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym); | |
2148 | TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym); | |
2149 | if (SYMBOL_VALUE (xsym) < 0) | |
2150 | unsigned_enum = 0; | |
2151 | TYPE_FIELD_BITSIZE (type, n) = 0; | |
2152 | } | |
2153 | if (syms == osyms) | |
2154 | break; | |
2155 | } | |
2156 | ||
2157 | if (unsigned_enum) | |
2158 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; | |
2159 | ||
2160 | return type; | |
2161 | } | |
2162 | ||
2163 | /* Register our ability to parse symbols for coff BFD files. */ | |
2164 | ||
2165 | static struct sym_fns coff_sym_fns = | |
2166 | { | |
2167 | bfd_target_coff_flavour, | |
c5aa993b JM |
2168 | coff_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
2169 | coff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
2170 | coff_symfile_read, /* sym_read: read a symbol file into symtab */ | |
2171 | coff_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
96baa820 | 2172 | default_symfile_offsets, /* sym_offsets: xlate external to internal form */ |
c5aa993b | 2173 | NULL /* next: pointer to next struct sym_fns */ |
c906108c SS |
2174 | }; |
2175 | ||
2176 | void | |
fba45db2 | 2177 | _initialize_coffread (void) |
c906108c SS |
2178 | { |
2179 | add_symtab_fns (&coff_sym_fns); | |
2180 | } |