Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Read coff symbol tables and convert to internal format, for GDB. |
b6ba6518 | 2 | Copyright 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, |
2de7ced7 | 3 | 1997, 1998, 1999, 2000, 2001, 2002, 2003 |
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" | |
04ea0df1 | 31 | #include "gdb_obstack.h" |
c906108c SS |
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" |
fe898f56 | 47 | #include "block.h" |
c906108c | 48 | |
1b6bc7e0 CF |
49 | #include "coff-pe-read.h" |
50 | ||
a14ed312 | 51 | extern void _initialize_coffread (void); |
392a587b | 52 | |
c5aa993b JM |
53 | struct coff_symfile_info |
54 | { | |
55 | file_ptr min_lineno_offset; /* Where in file lowest line#s are */ | |
56 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ | |
c906108c | 57 | |
c5aa993b JM |
58 | CORE_ADDR textaddr; /* Addr of .text section. */ |
59 | unsigned int textsize; /* Size of .text section. */ | |
60 | struct stab_section_list *stabsects; /* .stab sections. */ | |
61 | asection *stabstrsect; /* Section pointer for .stab section */ | |
62 | char *stabstrdata; | |
63 | }; | |
c906108c SS |
64 | |
65 | /* Translate an external name string into a user-visible name. */ | |
66 | #define EXTERNAL_NAME(string, abfd) \ | |
67 | (string[0] == bfd_get_symbol_leading_char(abfd)? string+1: string) | |
68 | ||
69 | /* To be an sdb debug type, type must have at least a basic or primary | |
70 | derived type. Using this rather than checking against T_NULL is | |
71 | said to prevent core dumps if we try to operate on Michael Bloom | |
72 | dbx-in-coff file. */ | |
73 | ||
74 | #define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK)) | |
75 | ||
c906108c SS |
76 | /* Core address of start and end of text of current source file. |
77 | This comes from a ".text" symbol where x_nlinno > 0. */ | |
78 | ||
79 | static CORE_ADDR current_source_start_addr; | |
80 | static CORE_ADDR current_source_end_addr; | |
81 | ||
82 | /* The addresses of the symbol table stream and number of symbols | |
83 | of the object file we are reading (as copied into core). */ | |
84 | ||
85 | static bfd *nlist_bfd_global; | |
86 | static int nlist_nsyms_global; | |
87 | ||
c906108c SS |
88 | |
89 | /* Pointers to scratch storage, used for reading raw symbols and auxents. */ | |
90 | ||
91 | static char *temp_sym; | |
92 | static char *temp_aux; | |
93 | ||
94 | /* Local variables that hold the shift and mask values for the | |
95 | COFF file that we are currently reading. These come back to us | |
96 | from BFD, and are referenced by their macro names, as well as | |
97 | internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF | |
98 | macros from include/coff/internal.h . */ | |
99 | ||
c5aa993b JM |
100 | static unsigned local_n_btmask; |
101 | static unsigned local_n_btshft; | |
102 | static unsigned local_n_tmask; | |
103 | static unsigned local_n_tshift; | |
c906108c SS |
104 | |
105 | #define N_BTMASK local_n_btmask | |
106 | #define N_BTSHFT local_n_btshft | |
107 | #define N_TMASK local_n_tmask | |
108 | #define N_TSHIFT local_n_tshift | |
c5aa993b | 109 | |
c906108c SS |
110 | /* Local variables that hold the sizes in the file of various COFF structures. |
111 | (We only need to know this to read them from the file -- BFD will then | |
112 | translate the data in them, into `internal_xxx' structs in the right | |
113 | byte order, alignment, etc.) */ | |
114 | ||
c5aa993b JM |
115 | static unsigned local_linesz; |
116 | static unsigned local_symesz; | |
117 | static unsigned local_auxesz; | |
c906108c SS |
118 | |
119 | /* This is set if this is a PE format file. */ | |
120 | ||
121 | static int pe_file; | |
122 | ||
123 | /* Chain of typedefs of pointers to empty struct/union types. | |
124 | They are chained thru the SYMBOL_VALUE_CHAIN. */ | |
125 | ||
126 | static struct symbol *opaque_type_chain[HASHSIZE]; | |
127 | ||
c906108c SS |
128 | /* Simplified internal version of coff symbol table information */ |
129 | ||
c5aa993b JM |
130 | struct coff_symbol |
131 | { | |
132 | char *c_name; | |
133 | int c_symnum; /* symbol number of this entry */ | |
134 | int c_naux; /* 0 if syment only, 1 if syment + auxent, etc */ | |
135 | long c_value; | |
136 | int c_sclass; | |
137 | int c_secnum; | |
138 | unsigned int c_type; | |
139 | }; | |
c906108c | 140 | |
a14ed312 | 141 | extern void stabsread_clear_cache (void); |
7be570e7 | 142 | |
a14ed312 | 143 | static struct type *coff_read_struct_type (int, int, int); |
c906108c | 144 | |
a14ed312 KB |
145 | static struct type *decode_base_type (struct coff_symbol *, |
146 | unsigned int, union internal_auxent *); | |
c906108c | 147 | |
a14ed312 KB |
148 | static struct type *decode_type (struct coff_symbol *, unsigned int, |
149 | union internal_auxent *); | |
c906108c | 150 | |
a14ed312 KB |
151 | static struct type *decode_function_type (struct coff_symbol *, |
152 | unsigned int, | |
153 | union internal_auxent *); | |
c906108c | 154 | |
a14ed312 | 155 | static struct type *coff_read_enum_type (int, int, int); |
c906108c | 156 | |
a14ed312 KB |
157 | static struct symbol *process_coff_symbol (struct coff_symbol *, |
158 | union internal_auxent *, | |
159 | struct objfile *); | |
c906108c | 160 | |
a14ed312 | 161 | static void patch_opaque_types (struct symtab *); |
c906108c | 162 | |
a14ed312 | 163 | static void enter_linenos (long, int, int, struct objfile *); |
c906108c | 164 | |
a14ed312 | 165 | static void free_linetab (void); |
c906108c | 166 | |
74b7792f AC |
167 | static void free_linetab_cleanup (void *ignore); |
168 | ||
a14ed312 | 169 | static int init_lineno (bfd *, long, int); |
c906108c | 170 | |
a14ed312 | 171 | static char *getsymname (struct internal_syment *); |
c906108c | 172 | |
a14ed312 | 173 | static char *coff_getfilename (union internal_auxent *); |
c906108c | 174 | |
a14ed312 | 175 | static void free_stringtab (void); |
c906108c | 176 | |
74b7792f AC |
177 | static void free_stringtab_cleanup (void *ignore); |
178 | ||
a14ed312 | 179 | static int init_stringtab (bfd *, long); |
c906108c | 180 | |
a14ed312 KB |
181 | static void read_one_sym (struct coff_symbol *, |
182 | struct internal_syment *, union internal_auxent *); | |
c906108c | 183 | |
a14ed312 | 184 | static void coff_symtab_read (long, unsigned int, struct objfile *); |
c906108c SS |
185 | \f |
186 | /* We are called once per section from coff_symfile_read. We | |
187 | need to examine each section we are passed, check to see | |
188 | if it is something we are interested in processing, and | |
189 | if so, stash away some access information for the section. | |
190 | ||
191 | FIXME: The section names should not be hardwired strings (what | |
192 | should they be? I don't think most object file formats have enough | |
193 | section flags to specify what kind of debug section it is | |
194 | -kingdon). */ | |
195 | ||
196 | static void | |
12b9c64f | 197 | coff_locate_sections (bfd *abfd, asection *sectp, void *csip) |
c906108c SS |
198 | { |
199 | register struct coff_symfile_info *csi; | |
200 | const char *name; | |
201 | ||
202 | csi = (struct coff_symfile_info *) csip; | |
203 | name = bfd_get_section_name (abfd, sectp); | |
204 | if (STREQ (name, ".text")) | |
205 | { | |
206 | csi->textaddr = bfd_section_vma (abfd, sectp); | |
207 | csi->textsize += bfd_section_size (abfd, sectp); | |
208 | } | |
209 | else if (strncmp (name, ".text", sizeof ".text" - 1) == 0) | |
210 | { | |
211 | csi->textsize += bfd_section_size (abfd, sectp); | |
212 | } | |
213 | else if (STREQ (name, ".stabstr")) | |
214 | { | |
215 | csi->stabstrsect = sectp; | |
216 | } | |
217 | else if (strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
218 | { | |
219 | const char *s; | |
220 | ||
221 | /* We can have multiple .stab sections if linked with | |
222 | --split-by-reloc. */ | |
223 | for (s = name + sizeof ".stab" - 1; *s != '\0'; s++) | |
c5aa993b | 224 | if (!isdigit (*s)) |
c906108c SS |
225 | break; |
226 | if (*s == '\0') | |
227 | { | |
228 | struct stab_section_list *n, **pn; | |
229 | ||
230 | n = ((struct stab_section_list *) | |
231 | xmalloc (sizeof (struct stab_section_list))); | |
232 | n->section = sectp; | |
233 | n->next = NULL; | |
234 | for (pn = &csi->stabsects; *pn != NULL; pn = &(*pn)->next) | |
235 | ; | |
236 | *pn = n; | |
237 | ||
238 | /* This will be run after coffstab_build_psymtabs is called | |
c5aa993b JM |
239 | in coff_symfile_read, at which point we no longer need |
240 | the information. */ | |
b8c9b27d | 241 | make_cleanup (xfree, n); |
c906108c SS |
242 | } |
243 | } | |
244 | } | |
245 | ||
246 | /* Return the section_offsets* that CS points to. */ | |
a14ed312 | 247 | static int cs_to_section (struct coff_symbol *, struct objfile *); |
c906108c | 248 | |
c5aa993b JM |
249 | struct find_targ_sec_arg |
250 | { | |
251 | int targ_index; | |
252 | asection **resultp; | |
253 | }; | |
c906108c | 254 | |
c5aa993b | 255 | static void |
12b9c64f | 256 | find_targ_sec (bfd *abfd, asection *sect, void *obj) |
c906108c | 257 | { |
c5aa993b | 258 | struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj; |
c906108c SS |
259 | if (sect->target_index == args->targ_index) |
260 | *args->resultp = sect; | |
261 | } | |
262 | ||
263 | /* Return the section number (SECT_OFF_*) that CS points to. */ | |
264 | static int | |
fba45db2 | 265 | cs_to_section (struct coff_symbol *cs, struct objfile *objfile) |
c906108c SS |
266 | { |
267 | asection *sect = NULL; | |
268 | struct find_targ_sec_arg args; | |
b8fbeb18 | 269 | int off = SECT_OFF_TEXT (objfile); |
c906108c SS |
270 | |
271 | args.targ_index = cs->c_secnum; | |
272 | args.resultp = § | |
273 | bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); | |
274 | if (sect != NULL) | |
275 | { | |
276 | /* This is the section. Figure out what SECT_OFF_* code it is. */ | |
277 | if (bfd_get_section_flags (abfd, sect) & SEC_CODE) | |
b8fbeb18 | 278 | off = SECT_OFF_TEXT (objfile); |
c906108c | 279 | else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD) |
b8fbeb18 | 280 | off = SECT_OFF_DATA (objfile); |
c906108c | 281 | else |
a4c8257b EZ |
282 | /* Just return the bfd section index. */ |
283 | off = sect->index; | |
c906108c SS |
284 | } |
285 | return off; | |
286 | } | |
287 | ||
288 | /* Return the address of the section of a COFF symbol. */ | |
289 | ||
a14ed312 | 290 | static CORE_ADDR cs_section_address (struct coff_symbol *, bfd *); |
c906108c SS |
291 | |
292 | static CORE_ADDR | |
fba45db2 | 293 | cs_section_address (struct coff_symbol *cs, bfd *abfd) |
c906108c SS |
294 | { |
295 | asection *sect = NULL; | |
296 | struct find_targ_sec_arg args; | |
297 | CORE_ADDR addr = 0; | |
298 | ||
299 | args.targ_index = cs->c_secnum; | |
300 | args.resultp = § | |
301 | bfd_map_over_sections (abfd, find_targ_sec, &args); | |
302 | if (sect != NULL) | |
303 | addr = bfd_get_section_vma (objfile->obfd, sect); | |
304 | return addr; | |
305 | } | |
306 | ||
307 | /* Look up a coff type-number index. Return the address of the slot | |
308 | where the type for that index is stored. | |
309 | The type-number is in INDEX. | |
310 | ||
311 | This can be used for finding the type associated with that index | |
312 | or for associating a new type with the index. */ | |
313 | ||
314 | static struct type ** | |
fba45db2 | 315 | coff_lookup_type (register int index) |
c906108c SS |
316 | { |
317 | if (index >= type_vector_length) | |
318 | { | |
319 | int old_vector_length = type_vector_length; | |
320 | ||
321 | type_vector_length *= 2; | |
c5aa993b | 322 | if (index /* is still */ >= type_vector_length) |
c906108c SS |
323 | type_vector_length = index * 2; |
324 | ||
325 | type_vector = (struct type **) | |
326 | xrealloc ((char *) type_vector, | |
327 | type_vector_length * sizeof (struct type *)); | |
328 | memset (&type_vector[old_vector_length], 0, | |
c5aa993b | 329 | (type_vector_length - old_vector_length) * sizeof (struct type *)); |
c906108c SS |
330 | } |
331 | return &type_vector[index]; | |
332 | } | |
333 | ||
334 | /* Make sure there is a type allocated for type number index | |
335 | and return the type object. | |
336 | This can create an empty (zeroed) type object. */ | |
337 | ||
338 | static struct type * | |
fba45db2 | 339 | coff_alloc_type (int index) |
c906108c SS |
340 | { |
341 | register struct type **type_addr = coff_lookup_type (index); | |
342 | register struct type *type = *type_addr; | |
343 | ||
344 | /* If we are referring to a type not known at all yet, | |
345 | allocate an empty type for it. | |
346 | We will fill it in later if we find out how. */ | |
347 | if (type == NULL) | |
348 | { | |
349 | type = alloc_type (current_objfile); | |
350 | *type_addr = type; | |
351 | } | |
352 | return type; | |
353 | } | |
354 | \f | |
c906108c SS |
355 | /* Start a new symtab for a new source file. |
356 | This is called when a COFF ".file" symbol is seen; | |
357 | it indicates the start of data for one original source file. */ | |
358 | ||
359 | static void | |
fba45db2 | 360 | coff_start_symtab (char *name) |
c906108c SS |
361 | { |
362 | start_symtab ( | |
c5aa993b JM |
363 | /* We fill in the filename later. start_symtab puts |
364 | this pointer into last_source_file and we put it in | |
365 | subfiles->name, which end_symtab frees; that's why | |
366 | it must be malloc'd. */ | |
367 | savestring (name, strlen (name)), | |
368 | /* We never know the directory name for COFF. */ | |
369 | NULL, | |
370 | /* The start address is irrelevant, since we set | |
371 | last_source_start_addr in coff_end_symtab. */ | |
372 | 0); | |
c906108c | 373 | record_debugformat ("COFF"); |
c906108c SS |
374 | } |
375 | ||
376 | /* Save the vital information from when starting to read a file, | |
377 | for use when closing off the current file. | |
378 | NAME is the file name the symbols came from, START_ADDR is the first | |
379 | text address for the file, and SIZE is the number of bytes of text. */ | |
380 | ||
381 | static void | |
fba45db2 | 382 | complete_symtab (char *name, CORE_ADDR start_addr, unsigned int size) |
c906108c SS |
383 | { |
384 | if (last_source_file != NULL) | |
b8c9b27d | 385 | xfree (last_source_file); |
c906108c SS |
386 | last_source_file = savestring (name, strlen (name)); |
387 | current_source_start_addr = start_addr; | |
388 | current_source_end_addr = start_addr + size; | |
389 | ||
c5aa993b JM |
390 | if (current_objfile->ei.entry_point >= current_source_start_addr && |
391 | current_objfile->ei.entry_point < current_source_end_addr) | |
c906108c | 392 | { |
c5aa993b JM |
393 | current_objfile->ei.entry_file_lowpc = current_source_start_addr; |
394 | current_objfile->ei.entry_file_highpc = current_source_end_addr; | |
c906108c SS |
395 | } |
396 | } | |
397 | ||
398 | /* Finish the symbol definitions for one main source file, | |
399 | close off all the lexical contexts for that file | |
400 | (creating struct block's for them), then make the | |
401 | struct symtab for that file and put it in the list of all such. */ | |
402 | ||
403 | static void | |
fba45db2 | 404 | coff_end_symtab (struct objfile *objfile) |
c906108c SS |
405 | { |
406 | struct symtab *symtab; | |
407 | ||
408 | last_source_start_addr = current_source_start_addr; | |
409 | ||
44c75fb3 | 410 | symtab = end_symtab (current_source_end_addr, objfile, SECT_OFF_TEXT (objfile)); |
c906108c SS |
411 | |
412 | if (symtab != NULL) | |
413 | free_named_symtabs (symtab->filename); | |
414 | ||
415 | /* Reinitialize for beginning of new file. */ | |
c906108c SS |
416 | last_source_file = NULL; |
417 | } | |
418 | \f | |
419 | static void | |
fba45db2 KB |
420 | record_minimal_symbol (char *name, CORE_ADDR address, |
421 | enum minimal_symbol_type type, struct objfile *objfile) | |
c906108c SS |
422 | { |
423 | /* We don't want TDESC entry points in the minimal symbol table */ | |
c5aa993b JM |
424 | if (name[0] == '@') |
425 | return; | |
c906108c SS |
426 | |
427 | prim_record_minimal_symbol (name, address, type, objfile); | |
428 | } | |
429 | \f | |
430 | /* coff_symfile_init () | |
431 | is the coff-specific initialization routine for reading symbols. | |
432 | It is passed a struct objfile which contains, among other things, | |
433 | the BFD for the file whose symbols are being read, and a slot for | |
434 | a pointer to "private data" which we fill with cookies and other | |
435 | treats for coff_symfile_read (). | |
436 | ||
437 | We will only be called if this is a COFF or COFF-like file. | |
438 | BFD handles figuring out the format of the file, and code in symtab.c | |
439 | uses BFD's determination to vector to us. | |
440 | ||
441 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ | |
442 | ||
443 | static void | |
fba45db2 | 444 | coff_symfile_init (struct objfile *objfile) |
c906108c SS |
445 | { |
446 | /* Allocate struct to keep track of stab reading. */ | |
447 | objfile->sym_stab_info = (struct dbx_symfile_info *) | |
448 | xmmalloc (objfile->md, sizeof (struct dbx_symfile_info)); | |
449 | ||
12b9c64f AO |
450 | memset (objfile->sym_stab_info, 0, |
451 | sizeof (struct dbx_symfile_info)); | |
c906108c SS |
452 | |
453 | /* Allocate struct to keep track of the symfile */ | |
454 | objfile->sym_private = xmmalloc (objfile->md, | |
455 | sizeof (struct coff_symfile_info)); | |
456 | ||
457 | memset (objfile->sym_private, 0, sizeof (struct coff_symfile_info)); | |
458 | ||
459 | /* COFF objects may be reordered, so set OBJF_REORDERED. If we | |
460 | find this causes a significant slowdown in gdb then we could | |
461 | set it in the debug symbol readers only when necessary. */ | |
462 | objfile->flags |= OBJF_REORDERED; | |
463 | ||
464 | init_entry_point_info (objfile); | |
465 | } | |
466 | ||
467 | /* This function is called for every section; it finds the outer limits | |
468 | of the line table (minimum and maximum file offset) so that the | |
469 | mainline code can read the whole thing for efficiency. */ | |
470 | ||
471 | /* ARGSUSED */ | |
472 | static void | |
12b9c64f | 473 | find_linenos (bfd *abfd, sec_ptr asect, void *vpinfo) |
c906108c SS |
474 | { |
475 | struct coff_symfile_info *info; | |
476 | int size, count; | |
477 | file_ptr offset, maxoff; | |
478 | ||
479 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
480 | count = asect->lineno_count; | |
481 | /* End of warning */ | |
482 | ||
483 | if (count == 0) | |
484 | return; | |
485 | size = count * local_linesz; | |
486 | ||
c5aa993b | 487 | info = (struct coff_symfile_info *) vpinfo; |
c906108c SS |
488 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
489 | offset = asect->line_filepos; | |
490 | /* End of warning */ | |
491 | ||
492 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) | |
493 | info->min_lineno_offset = offset; | |
494 | ||
495 | maxoff = offset + size; | |
496 | if (maxoff > info->max_lineno_offset) | |
497 | info->max_lineno_offset = maxoff; | |
498 | } | |
499 | ||
500 | ||
501 | /* The BFD for this file -- only good while we're actively reading | |
502 | symbols into a psymtab or a symtab. */ | |
503 | ||
504 | static bfd *symfile_bfd; | |
505 | ||
506 | /* Read a symbol file, after initialization by coff_symfile_init. */ | |
507 | ||
508 | /* ARGSUSED */ | |
509 | static void | |
fba45db2 | 510 | coff_symfile_read (struct objfile *objfile, int mainline) |
c906108c SS |
511 | { |
512 | struct coff_symfile_info *info; | |
513 | struct dbx_symfile_info *dbxinfo; | |
514 | bfd *abfd = objfile->obfd; | |
515 | coff_data_type *cdata = coff_data (abfd); | |
516 | char *name = bfd_get_filename (abfd); | |
517 | register int val; | |
745b8ca0 | 518 | unsigned int num_symbols; |
c906108c SS |
519 | int symtab_offset; |
520 | int stringtab_offset; | |
521 | struct cleanup *back_to; | |
522 | int stabstrsize; | |
c2d11a7d JM |
523 | int len; |
524 | char * target; | |
525 | ||
c5aa993b | 526 | info = (struct coff_symfile_info *) objfile->sym_private; |
c906108c | 527 | dbxinfo = objfile->sym_stab_info; |
c5aa993b | 528 | symfile_bfd = abfd; /* Kludge for swap routines */ |
c906108c SS |
529 | |
530 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ | |
c5aa993b JM |
531 | num_symbols = bfd_get_symcount (abfd); /* How many syms */ |
532 | symtab_offset = cdata->sym_filepos; /* Symbol table file offset */ | |
533 | stringtab_offset = symtab_offset + /* String table file offset */ | |
534 | num_symbols * cdata->local_symesz; | |
c906108c SS |
535 | |
536 | /* Set a few file-statics that give us specific information about | |
537 | the particular COFF file format we're reading. */ | |
c906108c SS |
538 | local_n_btmask = cdata->local_n_btmask; |
539 | local_n_btshft = cdata->local_n_btshft; | |
c5aa993b | 540 | local_n_tmask = cdata->local_n_tmask; |
c906108c | 541 | local_n_tshift = cdata->local_n_tshift; |
c5aa993b JM |
542 | local_linesz = cdata->local_linesz; |
543 | local_symesz = cdata->local_symesz; | |
544 | local_auxesz = cdata->local_auxesz; | |
c906108c SS |
545 | |
546 | /* Allocate space for raw symbol and aux entries, based on their | |
547 | space requirements as reported by BFD. */ | |
548 | temp_sym = (char *) xmalloc | |
c5aa993b | 549 | (cdata->local_symesz + cdata->local_auxesz); |
c906108c | 550 | temp_aux = temp_sym + cdata->local_symesz; |
c13c43fd | 551 | back_to = make_cleanup (free_current_contents, &temp_sym); |
c906108c SS |
552 | |
553 | /* We need to know whether this is a PE file, because in PE files, | |
554 | unlike standard COFF files, symbol values are stored as offsets | |
555 | from the section address, rather than as absolute addresses. | |
556 | FIXME: We should use BFD to read the symbol table, and thus avoid | |
557 | this problem. */ | |
0d06e24b JM |
558 | pe_file = |
559 | strncmp (bfd_get_target (objfile->obfd), "pe", 2) == 0 | |
560 | || strncmp (bfd_get_target (objfile->obfd), "epoc-pe", 7) == 0; | |
c906108c SS |
561 | |
562 | /* End of warning */ | |
563 | ||
c906108c SS |
564 | info->min_lineno_offset = 0; |
565 | info->max_lineno_offset = 0; | |
c906108c | 566 | |
ebeb39fe JB |
567 | /* Only read line number information if we have symbols. |
568 | ||
569 | On Windows NT, some of the system's DLL's have sections with | |
570 | PointerToLinenumbers fields that are non-zero, but point at | |
571 | random places within the image file. (In the case I found, | |
572 | KERNEL32.DLL's .text section has a line number info pointer that | |
573 | points into the middle of the string `lib\\i386\kernel32.dll'.) | |
574 | ||
575 | However, these DLL's also have no symbols. The line number | |
576 | tables are meaningless without symbols. And in fact, GDB never | |
577 | uses the line number information unless there are symbols. So we | |
578 | can avoid spurious error messages (and maybe run a little | |
579 | faster!) by not even reading the line number table unless we have | |
580 | symbols. */ | |
581 | if (num_symbols > 0) | |
582 | { | |
583 | /* Read the line number table, all at once. */ | |
584 | bfd_map_over_sections (abfd, find_linenos, (void *) info); | |
585 | ||
586 | make_cleanup (free_linetab_cleanup, 0 /*ignore*/); | |
587 | val = init_lineno (abfd, info->min_lineno_offset, | |
588 | info->max_lineno_offset - info->min_lineno_offset); | |
589 | if (val < 0) | |
590 | error ("\"%s\": error reading line numbers\n", name); | |
591 | } | |
c906108c SS |
592 | |
593 | /* Now read the string table, all at once. */ | |
594 | ||
74b7792f | 595 | make_cleanup (free_stringtab_cleanup, 0 /*ignore*/); |
c906108c SS |
596 | val = init_stringtab (abfd, stringtab_offset); |
597 | if (val < 0) | |
598 | error ("\"%s\": can't get string table", name); | |
599 | ||
600 | init_minimal_symbol_collection (); | |
56e290f4 | 601 | make_cleanup_discard_minimal_symbols (); |
c906108c SS |
602 | |
603 | /* Now that the executable file is positioned at symbol table, | |
604 | process it and define symbols accordingly. */ | |
605 | ||
96baa820 | 606 | coff_symtab_read ((long) symtab_offset, num_symbols, objfile); |
c906108c SS |
607 | |
608 | /* Sort symbols alphabetically within each block. */ | |
609 | ||
610 | { | |
611 | struct symtab *s; | |
612 | ||
c5aa993b | 613 | for (s = objfile->symtabs; s != NULL; s = s->next) |
c906108c SS |
614 | sort_symtab_syms (s); |
615 | } | |
616 | ||
617 | /* Install any minimal symbols that have been collected as the current | |
618 | minimal symbols for this objfile. */ | |
619 | ||
620 | install_minimal_symbols (objfile); | |
621 | ||
12b9c64f | 622 | bfd_map_over_sections (abfd, coff_locate_sections, (void *) info); |
c906108c SS |
623 | |
624 | if (info->stabsects) | |
625 | { | |
c5aa993b | 626 | if (!info->stabstrsect) |
b83266a0 | 627 | { |
255e7dbf AC |
628 | error (("The debugging information in `%s' is corrupted.\n" |
629 | "The file has a `.stabs' section, but no `.stabstr' " | |
630 | "section."), | |
631 | name); | |
b83266a0 SS |
632 | } |
633 | ||
c906108c | 634 | /* FIXME: dubious. Why can't we use something normal like |
c5aa993b | 635 | bfd_get_section_contents? */ |
c906108c SS |
636 | bfd_seek (abfd, abfd->where, 0); |
637 | ||
638 | stabstrsize = bfd_section_size (abfd, info->stabstrsect); | |
639 | ||
640 | coffstab_build_psymtabs (objfile, | |
c906108c SS |
641 | mainline, |
642 | info->textaddr, info->textsize, | |
643 | info->stabsects, | |
644 | info->stabstrsect->filepos, stabstrsize); | |
645 | } | |
42a076f0 EZ |
646 | if (dwarf2_has_info (abfd)) |
647 | { | |
648 | /* DWARF2 sections. */ | |
649 | dwarf2_build_psymtabs (objfile, mainline); | |
650 | } | |
c906108c SS |
651 | |
652 | do_cleanups (back_to); | |
653 | } | |
654 | ||
655 | static void | |
fba45db2 | 656 | coff_new_init (struct objfile *ignore) |
c906108c SS |
657 | { |
658 | } | |
659 | ||
660 | /* Perform any local cleanups required when we are done with a particular | |
661 | objfile. I.E, we are in the process of discarding all symbol information | |
662 | for an objfile, freeing up all memory held for it, and unlinking the | |
663 | objfile struct from the global list of known objfiles. */ | |
664 | ||
665 | static void | |
fba45db2 | 666 | coff_symfile_finish (struct objfile *objfile) |
c906108c | 667 | { |
c5aa993b | 668 | if (objfile->sym_private != NULL) |
c906108c | 669 | { |
aac7f4ea | 670 | xmfree (objfile->md, objfile->sym_private); |
c906108c | 671 | } |
7be570e7 JM |
672 | |
673 | /* Let stabs reader clean up */ | |
674 | stabsread_clear_cache (); | |
c906108c | 675 | } |
c906108c | 676 | \f |
c5aa993b | 677 | |
c906108c SS |
678 | /* Given pointers to a symbol table in coff style exec file, |
679 | analyze them and create struct symtab's describing the symbols. | |
680 | NSYMS is the number of symbols in the symbol table. | |
681 | We read them one at a time using read_one_sym (). */ | |
682 | ||
683 | static void | |
fba45db2 KB |
684 | coff_symtab_read (long symtab_offset, unsigned int nsyms, |
685 | struct objfile *objfile) | |
c906108c SS |
686 | { |
687 | register struct context_stack *new; | |
688 | struct coff_symbol coff_symbol; | |
689 | register struct coff_symbol *cs = &coff_symbol; | |
690 | static struct internal_syment main_sym; | |
691 | static union internal_auxent main_aux; | |
692 | struct coff_symbol fcn_cs_saved; | |
693 | static struct internal_syment fcn_sym_saved; | |
694 | static union internal_auxent fcn_aux_saved; | |
695 | struct symtab *s; | |
696 | /* A .file is open. */ | |
697 | int in_source_file = 0; | |
698 | int next_file_symnum = -1; | |
699 | /* Name of the current file. */ | |
700 | char *filestring = ""; | |
701 | int depth = 0; | |
702 | int fcn_first_line = 0; | |
b9179dbc | 703 | CORE_ADDR fcn_first_line_addr = 0; |
c906108c SS |
704 | int fcn_last_line = 0; |
705 | int fcn_start_addr = 0; | |
706 | long fcn_line_ptr = 0; | |
707 | int val; | |
708 | CORE_ADDR tmpaddr; | |
709 | ||
710 | /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous.... | |
711 | it's hard to know I've really worked around it. The fix should be | |
712 | harmless, anyway). The symptom of the bug is that the first | |
713 | fread (in read_one_sym), will (in my example) actually get data | |
714 | from file offset 268, when the fseek was to 264 (and ftell shows | |
715 | 264). This causes all hell to break loose. I was unable to | |
716 | reproduce this on a short test program which operated on the same | |
717 | file, performing (I think) the same sequence of operations. | |
718 | ||
719 | It stopped happening when I put in this (former) rewind(). | |
720 | ||
721 | FIXME: Find out if this has been reported to Sun, whether it has | |
722 | been fixed in a later release, etc. */ | |
723 | ||
724 | bfd_seek (objfile->obfd, 0, 0); | |
725 | ||
726 | /* Position to read the symbol table. */ | |
727 | val = bfd_seek (objfile->obfd, (long) symtab_offset, 0); | |
728 | if (val < 0) | |
729 | perror_with_name (objfile->name); | |
730 | ||
731 | current_objfile = objfile; | |
732 | nlist_bfd_global = objfile->obfd; | |
733 | nlist_nsyms_global = nsyms; | |
734 | last_source_file = NULL; | |
735 | memset (opaque_type_chain, 0, sizeof opaque_type_chain); | |
736 | ||
c5aa993b | 737 | if (type_vector) /* Get rid of previous one */ |
b8c9b27d | 738 | xfree (type_vector); |
c906108c SS |
739 | type_vector_length = 160; |
740 | type_vector = (struct type **) | |
741 | xmalloc (type_vector_length * sizeof (struct type *)); | |
742 | memset (type_vector, 0, type_vector_length * sizeof (struct type *)); | |
743 | ||
744 | coff_start_symtab (""); | |
745 | ||
746 | symnum = 0; | |
747 | while (symnum < nsyms) | |
748 | { | |
749 | QUIT; /* Make this command interruptable. */ | |
750 | ||
751 | read_one_sym (cs, &main_sym, &main_aux); | |
752 | ||
753 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) | |
754 | { | |
755 | if (last_source_file) | |
756 | coff_end_symtab (objfile); | |
757 | ||
758 | coff_start_symtab ("_globals_"); | |
759 | complete_symtab ("_globals_", 0, 0); | |
760 | /* done with all files, everything from here on out is globals */ | |
761 | } | |
762 | ||
763 | /* Special case for file with type declarations only, no text. */ | |
764 | if (!last_source_file && SDB_TYPE (cs->c_type) | |
765 | && cs->c_secnum == N_DEBUG) | |
766 | complete_symtab (filestring, 0, 0); | |
767 | ||
768 | /* Typedefs should not be treated as symbol definitions. */ | |
769 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) | |
770 | { | |
771 | /* Record all functions -- external and static -- in minsyms. */ | |
b8fbeb18 | 772 | tmpaddr = cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c SS |
773 | record_minimal_symbol (cs->c_name, tmpaddr, mst_text, objfile); |
774 | ||
775 | fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; | |
776 | fcn_start_addr = tmpaddr; | |
777 | fcn_cs_saved = *cs; | |
778 | fcn_sym_saved = main_sym; | |
779 | fcn_aux_saved = main_aux; | |
780 | continue; | |
781 | } | |
782 | ||
783 | switch (cs->c_sclass) | |
784 | { | |
c5aa993b JM |
785 | case C_EFCN: |
786 | case C_EXTDEF: | |
787 | case C_ULABEL: | |
788 | case C_USTATIC: | |
789 | case C_LINE: | |
790 | case C_ALIAS: | |
791 | case C_HIDDEN: | |
23136709 KB |
792 | complaint (&symfile_complaints, "Bad n_sclass for symbol %s", |
793 | cs->c_name); | |
c5aa993b | 794 | break; |
c906108c | 795 | |
c5aa993b JM |
796 | case C_FILE: |
797 | /* c_value field contains symnum of next .file entry in table | |
798 | or symnum of first global after last .file. */ | |
799 | next_file_symnum = cs->c_value; | |
800 | if (cs->c_naux > 0) | |
801 | filestring = coff_getfilename (&main_aux); | |
802 | else | |
803 | filestring = ""; | |
804 | ||
805 | /* Complete symbol table for last object file | |
806 | containing debugging information. */ | |
807 | if (last_source_file) | |
808 | { | |
809 | coff_end_symtab (objfile); | |
810 | coff_start_symtab (filestring); | |
811 | } | |
812 | in_source_file = 1; | |
813 | break; | |
c906108c SS |
814 | |
815 | /* C_LABEL is used for labels and static functions. Including | |
816 | it here allows gdb to see static functions when no debug | |
817 | info is available. */ | |
c5aa993b JM |
818 | case C_LABEL: |
819 | /* However, labels within a function can make weird backtraces, | |
820 | so filter them out (from phdm@macqel.be). */ | |
821 | if (within_function) | |
822 | break; | |
823 | case C_STAT: | |
824 | case C_THUMBLABEL: | |
825 | case C_THUMBSTAT: | |
826 | case C_THUMBSTATFUNC: | |
827 | if (cs->c_name[0] == '.') | |
828 | { | |
829 | if (STREQ (cs->c_name, ".text")) | |
830 | { | |
c906108c SS |
831 | /* FIXME: don't wire in ".text" as section name |
832 | or symbol name! */ | |
833 | /* Check for in_source_file deals with case of | |
834 | a file with debugging symbols | |
835 | followed by a later file with no symbols. */ | |
836 | if (in_source_file) | |
837 | complete_symtab (filestring, | |
b8fbeb18 | 838 | cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)), |
c906108c SS |
839 | main_aux.x_scn.x_scnlen); |
840 | in_source_file = 0; | |
841 | } | |
c5aa993b | 842 | /* flush rest of '.' symbols */ |
c906108c | 843 | break; |
c5aa993b JM |
844 | } |
845 | else if (!SDB_TYPE (cs->c_type) | |
846 | && cs->c_name[0] == 'L' | |
847 | && (strncmp (cs->c_name, "LI%", 3) == 0 | |
848 | || strncmp (cs->c_name, "LF%", 3) == 0 | |
849 | || strncmp (cs->c_name, "LC%", 3) == 0 | |
850 | || strncmp (cs->c_name, "LP%", 3) == 0 | |
851 | || strncmp (cs->c_name, "LPB%", 4) == 0 | |
852 | || strncmp (cs->c_name, "LBB%", 4) == 0 | |
853 | || strncmp (cs->c_name, "LBE%", 4) == 0 | |
854 | || strncmp (cs->c_name, "LPBX%", 5) == 0)) | |
855 | /* At least on a 3b1, gcc generates swbeg and string labels | |
856 | that look like this. Ignore them. */ | |
857 | break; | |
858 | /* fall in for static symbols that don't start with '.' */ | |
859 | case C_THUMBEXT: | |
860 | case C_THUMBEXTFUNC: | |
861 | case C_EXT: | |
862 | { | |
863 | /* Record it in the minimal symbols regardless of | |
864 | SDB_TYPE. This parallels what we do for other debug | |
865 | formats, and probably is needed to make | |
866 | print_address_symbolic work right without the (now | |
867 | gone) "set fast-symbolic-addr off" kludge. */ | |
c906108c | 868 | |
c5aa993b JM |
869 | /* FIXME: should use mst_abs, and not relocate, if absolute. */ |
870 | enum minimal_symbol_type ms_type; | |
871 | int sec; | |
c906108c | 872 | |
c5aa993b JM |
873 | if (cs->c_secnum == N_UNDEF) |
874 | { | |
875 | /* This is a common symbol. See if the target | |
876 | environment knows where it has been relocated to. */ | |
877 | CORE_ADDR reladdr; | |
878 | if (target_lookup_symbol (cs->c_name, &reladdr)) | |
879 | { | |
880 | /* Error in lookup; ignore symbol. */ | |
881 | break; | |
882 | } | |
883 | tmpaddr = reladdr; | |
884 | /* The address has already been relocated; make sure that | |
885 | objfile_relocate doesn't relocate it again. */ | |
886 | sec = -2; | |
887 | ms_type = cs->c_sclass == C_EXT | |
888 | || cs->c_sclass == C_THUMBEXT ? | |
889 | mst_bss : mst_file_bss; | |
890 | } | |
891 | else | |
892 | { | |
893 | sec = cs_to_section (cs, objfile); | |
894 | tmpaddr = cs->c_value; | |
895 | if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC | |
896 | || cs->c_sclass == C_THUMBEXT) | |
96baa820 | 897 | tmpaddr += ANOFFSET (objfile->section_offsets, sec); |
c906108c | 898 | |
2ec466f9 | 899 | if (sec == SECT_OFF_TEXT (objfile)) |
c5aa993b | 900 | { |
c5aa993b JM |
901 | ms_type = |
902 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC | |
903 | || cs->c_sclass == C_THUMBEXT ? | |
904 | mst_text : mst_file_text; | |
181c1381 | 905 | tmpaddr = SMASH_TEXT_ADDRESS (tmpaddr); |
b8fbeb18 | 906 | } |
34e924c0 EZ |
907 | else if (sec == SECT_OFF_DATA (objfile)) |
908 | { | |
c5aa993b JM |
909 | ms_type = |
910 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? | |
911 | mst_data : mst_file_data; | |
34e924c0 EZ |
912 | } |
913 | else if (sec == SECT_OFF_BSS (objfile)) | |
914 | { | |
c5aa993b JM |
915 | ms_type = |
916 | cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? | |
917 | mst_data : mst_file_data; | |
34e924c0 EZ |
918 | } |
919 | else | |
920 | ms_type = mst_unknown; | |
c5aa993b | 921 | } |
c906108c | 922 | |
c5aa993b JM |
923 | if (cs->c_name[0] != '@' /* Skip tdesc symbols */ ) |
924 | { | |
925 | struct minimal_symbol *msym; | |
c906108c | 926 | |
6ec4c4bd EZ |
927 | /* FIXME: cagney/2001-02-01: The nasty (int) -> (long) |
928 | -> (void*) cast is to ensure that that the value of | |
929 | cs->c_sclass can be correctly stored in a void | |
930 | pointer in MSYMBOL_INFO. Better solutions | |
931 | welcome. */ | |
932 | gdb_assert (sizeof (void *) >= sizeof (cs->c_sclass)); | |
c5aa993b | 933 | msym = prim_record_minimal_symbol_and_info |
6ec4c4bd EZ |
934 | (cs->c_name, tmpaddr, ms_type, (void *) (long) cs->c_sclass, |
935 | sec, NULL, objfile); | |
c5aa993b JM |
936 | if (msym) |
937 | COFF_MAKE_MSYMBOL_SPECIAL (cs->c_sclass, msym); | |
c5aa993b JM |
938 | } |
939 | if (SDB_TYPE (cs->c_type)) | |
940 | { | |
941 | struct symbol *sym; | |
942 | sym = process_coff_symbol | |
96baa820 | 943 | (cs, &main_aux, objfile); |
c5aa993b JM |
944 | SYMBOL_VALUE (sym) = tmpaddr; |
945 | SYMBOL_SECTION (sym) = sec; | |
946 | } | |
947 | } | |
948 | break; | |
949 | ||
950 | case C_FCN: | |
951 | if (STREQ (cs->c_name, ".bf")) | |
952 | { | |
953 | within_function = 1; | |
954 | ||
955 | /* value contains address of first non-init type code */ | |
956 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
957 | contains line number of '{' } */ | |
958 | if (cs->c_naux != 1) | |
23136709 KB |
959 | complaint (&symfile_complaints, |
960 | "`.bf' symbol %d has no aux entry", cs->c_symnum); | |
c5aa993b JM |
961 | fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; |
962 | fcn_first_line_addr = cs->c_value; | |
963 | ||
964 | /* Might want to check that locals are 0 and | |
965 | context_stack_depth is zero, and complain if not. */ | |
966 | ||
967 | depth = 0; | |
968 | new = push_context (depth, fcn_start_addr); | |
969 | fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); | |
970 | new->name = | |
96baa820 | 971 | process_coff_symbol (&fcn_cs_saved, &fcn_aux_saved, objfile); |
c5aa993b JM |
972 | } |
973 | else if (STREQ (cs->c_name, ".ef")) | |
974 | { | |
b9179dbc EZ |
975 | if (!within_function) |
976 | error ("Bad coff function information\n"); | |
c5aa993b JM |
977 | /* the value of .ef is the address of epilogue code; |
978 | not useful for gdb. */ | |
979 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
980 | contains number of lines to '}' */ | |
981 | ||
982 | if (context_stack_depth <= 0) | |
983 | { /* We attempted to pop an empty context stack */ | |
23136709 KB |
984 | complaint (&symfile_complaints, |
985 | "`.ef' symbol without matching `.bf' symbol ignored starting at symnum %d", | |
986 | cs->c_symnum); | |
c5aa993b JM |
987 | within_function = 0; |
988 | break; | |
c906108c | 989 | } |
c5aa993b JM |
990 | |
991 | new = pop_context (); | |
992 | /* Stack must be empty now. */ | |
993 | if (context_stack_depth > 0 || new == NULL) | |
c906108c | 994 | { |
23136709 KB |
995 | complaint (&symfile_complaints, |
996 | "Unmatched .ef symbol(s) ignored starting at symnum %d", | |
997 | cs->c_symnum); | |
c5aa993b JM |
998 | within_function = 0; |
999 | break; | |
c906108c | 1000 | } |
c5aa993b JM |
1001 | if (cs->c_naux != 1) |
1002 | { | |
23136709 KB |
1003 | complaint (&symfile_complaints, |
1004 | "`.ef' symbol %d has no aux entry", cs->c_symnum); | |
c5aa993b JM |
1005 | fcn_last_line = 0x7FFFFFFF; |
1006 | } | |
1007 | else | |
1008 | { | |
1009 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; | |
1010 | } | |
1011 | /* fcn_first_line is the line number of the opening '{'. | |
1012 | Do not record it - because it would affect gdb's idea | |
1013 | of the line number of the first statement of the function - | |
1014 | except for one-line functions, for which it is also the line | |
1015 | number of all the statements and of the closing '}', and | |
1016 | for which we do not have any other statement-line-number. */ | |
1017 | if (fcn_last_line == 1) | |
1018 | record_line (current_subfile, fcn_first_line, | |
1019 | fcn_first_line_addr); | |
1020 | else | |
1021 | enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line, | |
d4f3574e | 1022 | objfile); |
c906108c | 1023 | |
c5aa993b JM |
1024 | finish_block (new->name, &local_symbols, new->old_blocks, |
1025 | new->start_addr, | |
c906108c | 1026 | #if defined (FUNCTION_EPILOGUE_SIZE) |
c5aa993b JM |
1027 | /* This macro should be defined only on |
1028 | machines where the | |
1029 | fcn_aux_saved.x_sym.x_misc.x_fsize | |
1030 | field is always zero. | |
1031 | So use the .bf record information that | |
1032 | points to the epilogue and add the size | |
1033 | of the epilogue. */ | |
1034 | cs->c_value | |
1035 | + FUNCTION_EPILOGUE_SIZE | |
b8fbeb18 | 1036 | + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)), |
c906108c | 1037 | #else |
c5aa993b JM |
1038 | fcn_cs_saved.c_value |
1039 | + fcn_aux_saved.x_sym.x_misc.x_fsize | |
b8fbeb18 | 1040 | + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)), |
c906108c | 1041 | #endif |
c5aa993b JM |
1042 | objfile |
1043 | ); | |
1044 | within_function = 0; | |
1045 | } | |
1046 | break; | |
c906108c | 1047 | |
c5aa993b JM |
1048 | case C_BLOCK: |
1049 | if (STREQ (cs->c_name, ".bb")) | |
1050 | { | |
1051 | tmpaddr = cs->c_value; | |
b8fbeb18 | 1052 | tmpaddr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1053 | push_context (++depth, tmpaddr); |
1054 | } | |
1055 | else if (STREQ (cs->c_name, ".eb")) | |
1056 | { | |
1057 | if (context_stack_depth <= 0) | |
1058 | { /* We attempted to pop an empty context stack */ | |
23136709 KB |
1059 | complaint (&symfile_complaints, |
1060 | "`.eb' symbol without matching `.bb' symbol ignored starting at symnum %d", | |
1061 | cs->c_symnum); | |
c5aa993b JM |
1062 | break; |
1063 | } | |
c906108c | 1064 | |
c5aa993b JM |
1065 | new = pop_context (); |
1066 | if (depth-- != new->depth) | |
1067 | { | |
23136709 KB |
1068 | complaint (&symfile_complaints, |
1069 | "Mismatched .eb symbol ignored starting at symnum %d", | |
1070 | symnum); | |
c5aa993b JM |
1071 | break; |
1072 | } | |
1073 | if (local_symbols && context_stack_depth > 0) | |
1074 | { | |
1075 | tmpaddr = | |
b8fbeb18 | 1076 | cs->c_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1077 | /* Make a block for the local symbols within. */ |
1078 | finish_block (0, &local_symbols, new->old_blocks, | |
1079 | new->start_addr, tmpaddr, objfile); | |
1080 | } | |
1081 | /* Now pop locals of block just finished. */ | |
1082 | local_symbols = new->locals; | |
1083 | } | |
1084 | break; | |
c906108c | 1085 | |
c5aa993b | 1086 | default: |
96baa820 | 1087 | process_coff_symbol (cs, &main_aux, objfile); |
c5aa993b | 1088 | break; |
c906108c SS |
1089 | } |
1090 | } | |
1091 | ||
1b6bc7e0 CF |
1092 | if ((nsyms == 0) && (pe_file)) |
1093 | { | |
1094 | /* We've got no debugging symbols, but it's is a portable | |
1095 | executable, so try to read the export table */ | |
1096 | read_pe_exported_syms (objfile); | |
1097 | } | |
1098 | ||
c906108c SS |
1099 | if (last_source_file) |
1100 | coff_end_symtab (objfile); | |
1101 | ||
1102 | /* Patch up any opaque types (references to types that are not defined | |
1103 | in the file where they are referenced, e.g. "struct foo *bar"). */ | |
1104 | ALL_OBJFILE_SYMTABS (objfile, s) | |
1105 | patch_opaque_types (s); | |
1106 | ||
1107 | current_objfile = NULL; | |
1108 | } | |
1109 | \f | |
1110 | /* Routines for reading headers and symbols from executable. */ | |
1111 | ||
1112 | /* Read the next symbol, swap it, and return it in both internal_syment | |
1113 | form, and coff_symbol form. Also return its first auxent, if any, | |
1114 | in internal_auxent form, and skip any other auxents. */ | |
1115 | ||
1116 | static void | |
fba45db2 KB |
1117 | read_one_sym (register struct coff_symbol *cs, |
1118 | register struct internal_syment *sym, | |
1119 | register union internal_auxent *aux) | |
c906108c SS |
1120 | { |
1121 | int i; | |
1122 | ||
1123 | cs->c_symnum = symnum; | |
3a42e9d0 | 1124 | bfd_bread (temp_sym, local_symesz, nlist_bfd_global); |
c5aa993b | 1125 | bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *) sym); |
c906108c SS |
1126 | cs->c_naux = sym->n_numaux & 0xff; |
1127 | if (cs->c_naux >= 1) | |
1128 | { | |
3a42e9d0 | 1129 | bfd_bread (temp_aux, local_auxesz, nlist_bfd_global); |
c5aa993b JM |
1130 | bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass, |
1131 | 0, cs->c_naux, (char *) aux); | |
1132 | /* If more than one aux entry, read past it (only the first aux | |
1133 | is important). */ | |
1134 | for (i = 1; i < cs->c_naux; i++) | |
3a42e9d0 | 1135 | bfd_bread (temp_aux, local_auxesz, nlist_bfd_global); |
c906108c SS |
1136 | } |
1137 | cs->c_name = getsymname (sym); | |
1138 | cs->c_value = sym->n_value; | |
1139 | cs->c_sclass = (sym->n_sclass & 0xff); | |
1140 | cs->c_secnum = sym->n_scnum; | |
1141 | cs->c_type = (unsigned) sym->n_type; | |
1142 | if (!SDB_TYPE (cs->c_type)) | |
1143 | cs->c_type = 0; | |
1144 | ||
1145 | #if 0 | |
1146 | if (cs->c_sclass & 128) | |
c5aa993b | 1147 | printf ("thumb symbol %s, class 0x%x\n", cs->c_name, cs->c_sclass); |
c906108c SS |
1148 | #endif |
1149 | ||
1150 | symnum += 1 + cs->c_naux; | |
1151 | ||
1152 | /* The PE file format stores symbol values as offsets within the | |
1153 | section, rather than as absolute addresses. We correct that | |
1154 | here, if the symbol has an appropriate storage class. FIXME: We | |
1155 | should use BFD to read the symbols, rather than duplicating the | |
1156 | work here. */ | |
1157 | if (pe_file) | |
1158 | { | |
1159 | switch (cs->c_sclass) | |
1160 | { | |
1161 | case C_EXT: | |
1162 | case C_THUMBEXT: | |
1163 | case C_THUMBEXTFUNC: | |
1164 | case C_SECTION: | |
1165 | case C_NT_WEAK: | |
1166 | case C_STAT: | |
1167 | case C_THUMBSTAT: | |
1168 | case C_THUMBSTATFUNC: | |
1169 | case C_LABEL: | |
1170 | case C_THUMBLABEL: | |
1171 | case C_BLOCK: | |
1172 | case C_FCN: | |
1173 | case C_EFCN: | |
1174 | if (cs->c_secnum != 0) | |
1175 | cs->c_value += cs_section_address (cs, symfile_bfd); | |
1176 | break; | |
1177 | } | |
1178 | } | |
1179 | } | |
1180 | \f | |
1181 | /* Support for string table handling */ | |
1182 | ||
1183 | static char *stringtab = NULL; | |
1184 | ||
1185 | static int | |
fba45db2 | 1186 | init_stringtab (bfd *abfd, long offset) |
c906108c SS |
1187 | { |
1188 | long length; | |
1189 | int val; | |
1190 | unsigned char lengthbuf[4]; | |
1191 | ||
1192 | free_stringtab (); | |
1193 | ||
1194 | /* If the file is stripped, the offset might be zero, indicating no | |
1195 | string table. Just return with `stringtab' set to null. */ | |
1196 | if (offset == 0) | |
1197 | return 0; | |
1198 | ||
1199 | if (bfd_seek (abfd, offset, 0) < 0) | |
1200 | return -1; | |
1201 | ||
3a42e9d0 | 1202 | val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd); |
c906108c | 1203 | length = bfd_h_get_32 (symfile_bfd, lengthbuf); |
c5aa993b | 1204 | |
c906108c SS |
1205 | /* If no string table is needed, then the file may end immediately |
1206 | after the symbols. Just return with `stringtab' set to null. */ | |
1207 | if (val != sizeof lengthbuf || length < sizeof lengthbuf) | |
1208 | return 0; | |
1209 | ||
1210 | stringtab = (char *) xmalloc (length); | |
1211 | /* This is in target format (probably not very useful, and not currently | |
1212 | used), not host format. */ | |
1213 | memcpy (stringtab, lengthbuf, sizeof lengthbuf); | |
c5aa993b | 1214 | if (length == sizeof length) /* Empty table -- just the count */ |
c906108c SS |
1215 | return 0; |
1216 | ||
3a42e9d0 AM |
1217 | val = bfd_bread (stringtab + sizeof lengthbuf, length - sizeof lengthbuf, |
1218 | abfd); | |
c906108c SS |
1219 | if (val != length - sizeof lengthbuf || stringtab[length - 1] != '\0') |
1220 | return -1; | |
1221 | ||
1222 | return 0; | |
1223 | } | |
1224 | ||
1225 | static void | |
fba45db2 | 1226 | free_stringtab (void) |
c906108c SS |
1227 | { |
1228 | if (stringtab) | |
b8c9b27d | 1229 | xfree (stringtab); |
c906108c SS |
1230 | stringtab = NULL; |
1231 | } | |
1232 | ||
74b7792f AC |
1233 | static void |
1234 | free_stringtab_cleanup (void *ignore) | |
1235 | { | |
1236 | free_stringtab (); | |
1237 | } | |
1238 | ||
c906108c | 1239 | static char * |
fba45db2 | 1240 | getsymname (struct internal_syment *symbol_entry) |
c906108c | 1241 | { |
c5aa993b | 1242 | static char buffer[SYMNMLEN + 1]; |
c906108c SS |
1243 | char *result; |
1244 | ||
1245 | if (symbol_entry->_n._n_n._n_zeroes == 0) | |
1246 | { | |
1247 | /* FIXME: Probably should be detecting corrupt symbol files by | |
c5aa993b | 1248 | seeing whether offset points to within the stringtab. */ |
c906108c SS |
1249 | result = stringtab + symbol_entry->_n._n_n._n_offset; |
1250 | } | |
1251 | else | |
1252 | { | |
1253 | strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN); | |
1254 | buffer[SYMNMLEN] = '\0'; | |
1255 | result = buffer; | |
1256 | } | |
1257 | return result; | |
1258 | } | |
1259 | ||
1260 | /* Extract the file name from the aux entry of a C_FILE symbol. Return | |
1261 | only the last component of the name. Result is in static storage and | |
1262 | is only good for temporary use. */ | |
1263 | ||
1264 | static char * | |
fba45db2 | 1265 | coff_getfilename (union internal_auxent *aux_entry) |
c906108c SS |
1266 | { |
1267 | static char buffer[BUFSIZ]; | |
1268 | register char *temp; | |
1269 | char *result; | |
1270 | ||
1271 | if (aux_entry->x_file.x_n.x_zeroes == 0) | |
1272 | strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); | |
1273 | else | |
1274 | { | |
1275 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); | |
1276 | buffer[FILNMLEN] = '\0'; | |
1277 | } | |
1278 | result = buffer; | |
1279 | ||
1280 | /* FIXME: We should not be throwing away the information about what | |
1281 | directory. It should go into dirname of the symtab, or some such | |
1282 | place. */ | |
1283 | if ((temp = strrchr (result, '/')) != NULL) | |
1284 | result = temp + 1; | |
1285 | return (result); | |
1286 | } | |
1287 | \f | |
1288 | /* Support for line number handling. */ | |
1289 | ||
1290 | static char *linetab = NULL; | |
1291 | static long linetab_offset; | |
1292 | static unsigned long linetab_size; | |
1293 | ||
1294 | /* Read in all the line numbers for fast lookups later. Leave them in | |
1295 | external (unswapped) format in memory; we'll swap them as we enter | |
1296 | them into GDB's data structures. */ | |
c5aa993b | 1297 | |
c906108c | 1298 | static int |
fba45db2 | 1299 | init_lineno (bfd *abfd, long offset, int size) |
c906108c SS |
1300 | { |
1301 | int val; | |
1302 | ||
1303 | linetab_offset = offset; | |
1304 | linetab_size = size; | |
1305 | ||
c5aa993b | 1306 | free_linetab (); |
c906108c SS |
1307 | |
1308 | if (size == 0) | |
1309 | return 0; | |
1310 | ||
1311 | if (bfd_seek (abfd, offset, 0) < 0) | |
1312 | return -1; | |
c5aa993b | 1313 | |
c906108c SS |
1314 | /* Allocate the desired table, plus a sentinel */ |
1315 | linetab = (char *) xmalloc (size + local_linesz); | |
1316 | ||
3a42e9d0 | 1317 | val = bfd_bread (linetab, size, abfd); |
c906108c SS |
1318 | if (val != size) |
1319 | return -1; | |
1320 | ||
1321 | /* Terminate it with an all-zero sentinel record */ | |
1322 | memset (linetab + size, 0, local_linesz); | |
1323 | ||
1324 | return 0; | |
1325 | } | |
1326 | ||
1327 | static void | |
fba45db2 | 1328 | free_linetab (void) |
c906108c SS |
1329 | { |
1330 | if (linetab) | |
b8c9b27d | 1331 | xfree (linetab); |
c906108c SS |
1332 | linetab = NULL; |
1333 | } | |
1334 | ||
74b7792f AC |
1335 | static void |
1336 | free_linetab_cleanup (void *ignore) | |
1337 | { | |
1338 | free_linetab (); | |
1339 | } | |
1340 | ||
c906108c SS |
1341 | #if !defined (L_LNNO32) |
1342 | #define L_LNNO32(lp) ((lp)->l_lnno) | |
1343 | #endif | |
1344 | ||
1345 | static void | |
fba45db2 KB |
1346 | enter_linenos (long file_offset, register int first_line, |
1347 | register int last_line, struct objfile *objfile) | |
c906108c SS |
1348 | { |
1349 | register char *rawptr; | |
1350 | struct internal_lineno lptr; | |
1351 | ||
1352 | if (!linetab) | |
c5aa993b | 1353 | return; |
c906108c SS |
1354 | if (file_offset < linetab_offset) |
1355 | { | |
23136709 KB |
1356 | complaint (&symfile_complaints, |
1357 | "Line number pointer %ld lower than start of line numbers", | |
1358 | file_offset); | |
c906108c SS |
1359 | if (file_offset > linetab_size) /* Too big to be an offset? */ |
1360 | return; | |
c5aa993b | 1361 | file_offset += linetab_offset; /* Try reading at that linetab offset */ |
c906108c | 1362 | } |
c5aa993b | 1363 | |
c906108c SS |
1364 | rawptr = &linetab[file_offset - linetab_offset]; |
1365 | ||
1366 | /* skip first line entry for each function */ | |
1367 | rawptr += local_linesz; | |
1368 | /* line numbers start at one for the first line of the function */ | |
1369 | first_line--; | |
1370 | ||
c5aa993b JM |
1371 | for (;;) |
1372 | { | |
1373 | bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr); | |
1374 | rawptr += local_linesz; | |
1375 | /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */ | |
1376 | if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line) | |
1377 | record_line (current_subfile, first_line + L_LNNO32 (&lptr), | |
1378 | lptr.l_addr.l_paddr | |
b8fbeb18 | 1379 | + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile))); |
c5aa993b JM |
1380 | else |
1381 | break; | |
1382 | } | |
c906108c SS |
1383 | } |
1384 | \f | |
1385 | static void | |
fba45db2 | 1386 | patch_type (struct type *type, struct type *real_type) |
c906108c SS |
1387 | { |
1388 | register struct type *target = TYPE_TARGET_TYPE (type); | |
1389 | register struct type *real_target = TYPE_TARGET_TYPE (real_type); | |
1390 | int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); | |
1391 | ||
1392 | TYPE_LENGTH (target) = TYPE_LENGTH (real_target); | |
1393 | TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); | |
1394 | TYPE_FIELDS (target) = (struct field *) TYPE_ALLOC (target, field_size); | |
1395 | ||
1396 | memcpy (TYPE_FIELDS (target), TYPE_FIELDS (real_target), field_size); | |
1397 | ||
1398 | if (TYPE_NAME (real_target)) | |
1399 | { | |
1400 | if (TYPE_NAME (target)) | |
b8c9b27d | 1401 | xfree (TYPE_NAME (target)); |
c906108c SS |
1402 | TYPE_NAME (target) = concat (TYPE_NAME (real_target), NULL); |
1403 | } | |
1404 | } | |
1405 | ||
1406 | /* Patch up all appropriate typedef symbols in the opaque_type_chains | |
1407 | so that they can be used to print out opaque data structures properly. */ | |
1408 | ||
1409 | static void | |
fba45db2 | 1410 | patch_opaque_types (struct symtab *s) |
c906108c SS |
1411 | { |
1412 | register struct block *b; | |
1413 | register int i; | |
1414 | register struct symbol *real_sym; | |
c5aa993b | 1415 | |
c906108c SS |
1416 | /* Go through the per-file symbols only */ |
1417 | b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); | |
261397f8 | 1418 | ALL_BLOCK_SYMBOLS (b, i, real_sym) |
c906108c SS |
1419 | { |
1420 | /* Find completed typedefs to use to fix opaque ones. | |
c5aa993b JM |
1421 | Remove syms from the chain when their types are stored, |
1422 | but search the whole chain, as there may be several syms | |
1423 | from different files with the same name. */ | |
c906108c SS |
1424 | if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF && |
1425 | SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE && | |
1426 | TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR && | |
1427 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) | |
1428 | { | |
1429 | register char *name = SYMBOL_NAME (real_sym); | |
1430 | register int hash = hashname (name); | |
1431 | register struct symbol *sym, *prev; | |
c5aa993b | 1432 | |
c906108c SS |
1433 | prev = 0; |
1434 | for (sym = opaque_type_chain[hash]; sym;) | |
1435 | { | |
1436 | if (name[0] == SYMBOL_NAME (sym)[0] && | |
1437 | STREQ (name + 1, SYMBOL_NAME (sym) + 1)) | |
1438 | { | |
1439 | if (prev) | |
1440 | { | |
1441 | SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); | |
1442 | } | |
1443 | else | |
1444 | { | |
1445 | opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); | |
1446 | } | |
c5aa993b | 1447 | |
c906108c | 1448 | patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); |
c5aa993b | 1449 | |
c906108c SS |
1450 | if (prev) |
1451 | { | |
1452 | sym = SYMBOL_VALUE_CHAIN (prev); | |
1453 | } | |
1454 | else | |
1455 | { | |
1456 | sym = opaque_type_chain[hash]; | |
1457 | } | |
1458 | } | |
1459 | else | |
1460 | { | |
1461 | prev = sym; | |
1462 | sym = SYMBOL_VALUE_CHAIN (sym); | |
1463 | } | |
1464 | } | |
1465 | } | |
1466 | } | |
1467 | } | |
1468 | \f | |
1469 | static struct symbol * | |
fba45db2 KB |
1470 | process_coff_symbol (register struct coff_symbol *cs, |
1471 | register union internal_auxent *aux, | |
1472 | struct objfile *objfile) | |
c906108c SS |
1473 | { |
1474 | register struct symbol *sym | |
c5aa993b JM |
1475 | = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
1476 | sizeof (struct symbol)); | |
c906108c SS |
1477 | char *name; |
1478 | ||
1479 | memset (sym, 0, sizeof (struct symbol)); | |
1480 | name = cs->c_name; | |
1481 | name = EXTERNAL_NAME (name, objfile->obfd); | |
c906108c | 1482 | SYMBOL_LANGUAGE (sym) = language_auto; |
2de7ced7 | 1483 | SYMBOL_SET_NAMES (sym, name, strlen (name), objfile); |
c906108c SS |
1484 | |
1485 | /* default assumptions */ | |
1486 | SYMBOL_VALUE (sym) = cs->c_value; | |
1487 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1488 | SYMBOL_SECTION (sym) = cs_to_section (cs, objfile); | |
1489 | ||
1490 | if (ISFCN (cs->c_type)) | |
1491 | { | |
b8fbeb18 | 1492 | SYMBOL_VALUE (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1493 | SYMBOL_TYPE (sym) = |
1494 | lookup_function_type (decode_function_type (cs, cs->c_type, aux)); | |
c906108c SS |
1495 | |
1496 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
1497 | if (cs->c_sclass == C_STAT || cs->c_sclass == C_THUMBSTAT | |
1498 | || cs->c_sclass == C_THUMBSTATFUNC) | |
1499 | add_symbol_to_list (sym, &file_symbols); | |
1500 | else if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT | |
1501 | || cs->c_sclass == C_THUMBEXTFUNC) | |
1502 | add_symbol_to_list (sym, &global_symbols); | |
1503 | } | |
1504 | else | |
1505 | { | |
1506 | SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux); | |
1507 | switch (cs->c_sclass) | |
1508 | { | |
c5aa993b JM |
1509 | case C_NULL: |
1510 | break; | |
c906108c | 1511 | |
c5aa993b JM |
1512 | case C_AUTO: |
1513 | SYMBOL_CLASS (sym) = LOC_LOCAL; | |
1514 | add_symbol_to_list (sym, &local_symbols); | |
1515 | break; | |
c906108c | 1516 | |
c5aa993b JM |
1517 | case C_THUMBEXT: |
1518 | case C_THUMBEXTFUNC: | |
1519 | case C_EXT: | |
1520 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1521 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
b8fbeb18 | 1522 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1523 | add_symbol_to_list (sym, &global_symbols); |
1524 | break; | |
c906108c | 1525 | |
c5aa993b JM |
1526 | case C_THUMBSTAT: |
1527 | case C_THUMBSTATFUNC: | |
1528 | case C_STAT: | |
1529 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
1530 | SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; | |
b8fbeb18 | 1531 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c5aa993b JM |
1532 | if (within_function) |
1533 | { | |
c906108c SS |
1534 | /* Static symbol of local scope */ |
1535 | add_symbol_to_list (sym, &local_symbols); | |
1536 | } | |
c5aa993b JM |
1537 | else |
1538 | { | |
c906108c SS |
1539 | /* Static symbol at top level of file */ |
1540 | add_symbol_to_list (sym, &file_symbols); | |
1541 | } | |
c5aa993b | 1542 | break; |
c906108c SS |
1543 | |
1544 | #ifdef C_GLBLREG /* AMD coff */ | |
c5aa993b | 1545 | case C_GLBLREG: |
c906108c | 1546 | #endif |
c5aa993b JM |
1547 | case C_REG: |
1548 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
1549 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM (cs->c_value); | |
1550 | add_symbol_to_list (sym, &local_symbols); | |
1551 | break; | |
c906108c | 1552 | |
c5aa993b JM |
1553 | case C_THUMBLABEL: |
1554 | case C_LABEL: | |
1555 | break; | |
c906108c | 1556 | |
c5aa993b JM |
1557 | case C_ARG: |
1558 | SYMBOL_CLASS (sym) = LOC_ARG; | |
1559 | add_symbol_to_list (sym, &local_symbols); | |
c906108c | 1560 | #if !defined (BELIEVE_PCC_PROMOTION) |
d7449b42 | 1561 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
c5aa993b JM |
1562 | { |
1563 | /* If PCC says a parameter is a short or a char, | |
1564 | aligned on an int boundary, realign it to the | |
1565 | "little end" of the int. */ | |
1566 | struct type *temptype; | |
1567 | temptype = lookup_fundamental_type (current_objfile, | |
1568 | FT_INTEGER); | |
1569 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) | |
1570 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT | |
1571 | && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (temptype)) | |
1572 | { | |
1573 | SYMBOL_VALUE (sym) += | |
1574 | TYPE_LENGTH (temptype) | |
1575 | - TYPE_LENGTH (SYMBOL_TYPE (sym)); | |
1576 | } | |
1577 | } | |
c906108c | 1578 | #endif |
c5aa993b | 1579 | break; |
c906108c | 1580 | |
c5aa993b JM |
1581 | case C_REGPARM: |
1582 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
1583 | SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM (cs->c_value); | |
1584 | add_symbol_to_list (sym, &local_symbols); | |
c906108c | 1585 | #if !defined (BELIEVE_PCC_PROMOTION) |
c5aa993b JM |
1586 | /* FIXME: This should retain the current type, since it's just |
1587 | a register value. gnu@adobe, 26Feb93 */ | |
1588 | { | |
1589 | /* If PCC says a parameter is a short or a char, | |
1590 | it is really an int. */ | |
1591 | struct type *temptype; | |
1592 | temptype = | |
1593 | lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1594 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) | |
1595 | && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT) | |
c906108c | 1596 | { |
c5aa993b JM |
1597 | SYMBOL_TYPE (sym) = |
1598 | (TYPE_UNSIGNED (SYMBOL_TYPE (sym)) | |
1599 | ? lookup_fundamental_type (current_objfile, | |
1600 | FT_UNSIGNED_INTEGER) | |
1601 | : temptype); | |
c906108c | 1602 | } |
c5aa993b | 1603 | } |
c906108c | 1604 | #endif |
c5aa993b | 1605 | break; |
c906108c | 1606 | |
c5aa993b JM |
1607 | case C_TPDEF: |
1608 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1609 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1610 | ||
1611 | /* If type has no name, give it one */ | |
1612 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
1613 | { | |
1614 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR | |
1615 | || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC) | |
1616 | { | |
1617 | /* If we are giving a name to a type such as "pointer to | |
1618 | foo" or "function returning foo", we better not set | |
1619 | the TYPE_NAME. If the program contains "typedef char | |
1620 | *caddr_t;", we don't want all variables of type char | |
1621 | * to print as caddr_t. This is not just a | |
1622 | consequence of GDB's type management; CC and GCC (at | |
1623 | least through version 2.4) both output variables of | |
1624 | either type char * or caddr_t with the type | |
1625 | refering to the C_TPDEF symbol for caddr_t. If a future | |
1626 | compiler cleans this up it GDB is not ready for it | |
1627 | yet, but if it becomes ready we somehow need to | |
1628 | disable this check (without breaking the PCC/GCC2.4 | |
1629 | case). | |
1630 | ||
1631 | Sigh. | |
1632 | ||
1633 | Fortunately, this check seems not to be necessary | |
1634 | for anything except pointers or functions. */ | |
1635 | ; | |
1636 | } | |
1637 | else | |
1638 | TYPE_NAME (SYMBOL_TYPE (sym)) = | |
1639 | concat (SYMBOL_NAME (sym), NULL); | |
1640 | } | |
c906108c | 1641 | #ifdef CXUX_TARGET |
c5aa993b JM |
1642 | /* Ignore vendor section for Harris CX/UX targets. */ |
1643 | else if (cs->c_name[0] == '$') | |
1644 | break; | |
c906108c SS |
1645 | #endif /* CXUX_TARGET */ |
1646 | ||
c5aa993b JM |
1647 | /* Keep track of any type which points to empty structured type, |
1648 | so it can be filled from a definition from another file. A | |
1649 | simple forward reference (TYPE_CODE_UNDEF) is not an | |
1650 | empty structured type, though; the forward references | |
1651 | work themselves out via the magic of coff_lookup_type. */ | |
1652 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && | |
1653 | TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0 && | |
1654 | TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) != | |
1655 | TYPE_CODE_UNDEF) | |
1656 | { | |
1657 | register int i = hashname (SYMBOL_NAME (sym)); | |
c906108c | 1658 | |
c5aa993b JM |
1659 | SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; |
1660 | opaque_type_chain[i] = sym; | |
1661 | } | |
1662 | add_symbol_to_list (sym, &file_symbols); | |
1663 | break; | |
c906108c | 1664 | |
c5aa993b JM |
1665 | case C_STRTAG: |
1666 | case C_UNTAG: | |
1667 | case C_ENTAG: | |
1668 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1669 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
1670 | ||
1671 | /* Some compilers try to be helpful by inventing "fake" | |
1672 | names for anonymous enums, structures, and unions, like | |
1673 | "~0fake" or ".0fake". Thanks, but no thanks... */ | |
1674 | if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0) | |
1675 | if (SYMBOL_NAME (sym) != NULL | |
1676 | && *SYMBOL_NAME (sym) != '~' | |
1677 | && *SYMBOL_NAME (sym) != '.') | |
1678 | TYPE_TAG_NAME (SYMBOL_TYPE (sym)) = | |
1679 | concat (SYMBOL_NAME (sym), NULL); | |
1680 | ||
1681 | add_symbol_to_list (sym, &file_symbols); | |
1682 | break; | |
c906108c | 1683 | |
c5aa993b JM |
1684 | default: |
1685 | break; | |
c906108c SS |
1686 | } |
1687 | } | |
1688 | return sym; | |
1689 | } | |
1690 | \f | |
1691 | /* Decode a coff type specifier; return the type that is meant. */ | |
1692 | ||
1693 | static struct type * | |
fba45db2 KB |
1694 | decode_type (register struct coff_symbol *cs, unsigned int c_type, |
1695 | register union internal_auxent *aux) | |
c906108c SS |
1696 | { |
1697 | register struct type *type = 0; | |
1698 | unsigned int new_c_type; | |
1699 | ||
1700 | if (c_type & ~N_BTMASK) | |
1701 | { | |
1702 | new_c_type = DECREF (c_type); | |
1703 | if (ISPTR (c_type)) | |
1704 | { | |
1705 | type = decode_type (cs, new_c_type, aux); | |
1706 | type = lookup_pointer_type (type); | |
1707 | } | |
1708 | else if (ISFCN (c_type)) | |
1709 | { | |
1710 | type = decode_type (cs, new_c_type, aux); | |
1711 | type = lookup_function_type (type); | |
1712 | } | |
1713 | else if (ISARY (c_type)) | |
1714 | { | |
1715 | int i, n; | |
1716 | register unsigned short *dim; | |
1717 | struct type *base_type, *index_type, *range_type; | |
1718 | ||
1719 | /* Define an array type. */ | |
1720 | /* auxent refers to array, not base type */ | |
1721 | if (aux->x_sym.x_tagndx.l == 0) | |
1722 | cs->c_naux = 0; | |
1723 | ||
1724 | /* shift the indices down */ | |
1725 | dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; | |
1726 | i = 1; | |
1727 | n = dim[0]; | |
1728 | for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) | |
1729 | *dim = *(dim + 1); | |
1730 | *dim = 0; | |
1731 | ||
1732 | base_type = decode_type (cs, new_c_type, aux); | |
1733 | index_type = lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1734 | range_type = | |
1735 | create_range_type ((struct type *) NULL, index_type, 0, n - 1); | |
1736 | type = | |
1737 | create_array_type ((struct type *) NULL, base_type, range_type); | |
1738 | } | |
1739 | return type; | |
1740 | } | |
1741 | ||
1742 | /* Reference to existing type. This only occurs with the | |
1743 | struct, union, and enum types. EPI a29k coff | |
1744 | fakes us out by producing aux entries with a nonzero | |
1745 | x_tagndx for definitions of structs, unions, and enums, so we | |
1746 | have to check the c_sclass field. SCO 3.2v4 cc gets confused | |
1747 | with pointers to pointers to defined structs, and generates | |
1748 | negative x_tagndx fields. */ | |
1749 | if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0) | |
1750 | { | |
1751 | if (cs->c_sclass != C_STRTAG | |
1752 | && cs->c_sclass != C_UNTAG | |
1753 | && cs->c_sclass != C_ENTAG | |
1754 | && aux->x_sym.x_tagndx.l >= 0) | |
1755 | { | |
1756 | type = coff_alloc_type (aux->x_sym.x_tagndx.l); | |
1757 | return type; | |
1758 | } | |
1759 | else | |
1760 | { | |
23136709 KB |
1761 | complaint (&symfile_complaints, |
1762 | "Symbol table entry for %s has bad tagndx value", | |
1763 | cs->c_name); | |
c906108c SS |
1764 | /* And fall through to decode_base_type... */ |
1765 | } | |
1766 | } | |
1767 | ||
1768 | return decode_base_type (cs, BTYPE (c_type), aux); | |
1769 | } | |
1770 | ||
1771 | /* Decode a coff type specifier for function definition; | |
1772 | return the type that the function returns. */ | |
1773 | ||
1774 | static struct type * | |
fba45db2 KB |
1775 | decode_function_type (register struct coff_symbol *cs, unsigned int c_type, |
1776 | register union internal_auxent *aux) | |
c906108c SS |
1777 | { |
1778 | if (aux->x_sym.x_tagndx.l == 0) | |
c5aa993b | 1779 | cs->c_naux = 0; /* auxent refers to function, not base type */ |
c906108c SS |
1780 | |
1781 | return decode_type (cs, DECREF (c_type), aux); | |
1782 | } | |
1783 | \f | |
1784 | /* basic C types */ | |
1785 | ||
1786 | static struct type * | |
fba45db2 KB |
1787 | decode_base_type (register struct coff_symbol *cs, unsigned int c_type, |
1788 | register union internal_auxent *aux) | |
c906108c SS |
1789 | { |
1790 | struct type *type; | |
1791 | ||
1792 | switch (c_type) | |
1793 | { | |
c5aa993b JM |
1794 | case T_NULL: |
1795 | /* shows up with "void (*foo)();" structure members */ | |
1796 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
c906108c SS |
1797 | |
1798 | #if 0 | |
1799 | /* DGUX actually defines both T_ARG and T_VOID to the same value. */ | |
1800 | #ifdef T_ARG | |
c5aa993b JM |
1801 | case T_ARG: |
1802 | /* Shows up in DGUX, I think. Not sure where. */ | |
1803 | return lookup_fundamental_type (current_objfile, FT_VOID); /* shouldn't show up here */ | |
c906108c SS |
1804 | #endif |
1805 | #endif /* 0 */ | |
1806 | ||
1807 | #ifdef T_VOID | |
c5aa993b JM |
1808 | case T_VOID: |
1809 | /* Intel 960 COFF has this symbol and meaning. */ | |
1810 | return lookup_fundamental_type (current_objfile, FT_VOID); | |
c906108c SS |
1811 | #endif |
1812 | ||
c5aa993b JM |
1813 | case T_CHAR: |
1814 | return lookup_fundamental_type (current_objfile, FT_CHAR); | |
c906108c | 1815 | |
c5aa993b JM |
1816 | case T_SHORT: |
1817 | return lookup_fundamental_type (current_objfile, FT_SHORT); | |
c906108c | 1818 | |
c5aa993b JM |
1819 | case T_INT: |
1820 | return lookup_fundamental_type (current_objfile, FT_INTEGER); | |
c906108c | 1821 | |
c5aa993b JM |
1822 | case T_LONG: |
1823 | if (cs->c_sclass == C_FIELD | |
1824 | && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) | |
1825 | return lookup_fundamental_type (current_objfile, FT_LONG_LONG); | |
1826 | else | |
1827 | return lookup_fundamental_type (current_objfile, FT_LONG); | |
c906108c | 1828 | |
c5aa993b JM |
1829 | case T_FLOAT: |
1830 | return lookup_fundamental_type (current_objfile, FT_FLOAT); | |
c906108c | 1831 | |
c5aa993b JM |
1832 | case T_DOUBLE: |
1833 | return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); | |
c906108c | 1834 | |
c5aa993b JM |
1835 | case T_LNGDBL: |
1836 | return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); | |
c906108c | 1837 | |
c5aa993b JM |
1838 | case T_STRUCT: |
1839 | if (cs->c_naux != 1) | |
1840 | { | |
1841 | /* anonymous structure type */ | |
1842 | type = coff_alloc_type (cs->c_symnum); | |
1843 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1844 | TYPE_NAME (type) = NULL; | |
1845 | /* This used to set the tag to "<opaque>". But I think setting it | |
1846 | to NULL is right, and the printing code can print it as | |
1847 | "struct {...}". */ | |
1848 | TYPE_TAG_NAME (type) = NULL; | |
1849 | INIT_CPLUS_SPECIFIC (type); | |
1850 | TYPE_LENGTH (type) = 0; | |
1851 | TYPE_FIELDS (type) = 0; | |
1852 | TYPE_NFIELDS (type) = 0; | |
1853 | } | |
1854 | else | |
1855 | { | |
1856 | type = coff_read_struct_type (cs->c_symnum, | |
1857 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1858 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
1859 | } | |
1860 | return type; | |
c906108c | 1861 | |
c5aa993b JM |
1862 | case T_UNION: |
1863 | if (cs->c_naux != 1) | |
1864 | { | |
1865 | /* anonymous union type */ | |
1866 | type = coff_alloc_type (cs->c_symnum); | |
1867 | TYPE_NAME (type) = NULL; | |
1868 | /* This used to set the tag to "<opaque>". But I think setting it | |
1869 | to NULL is right, and the printing code can print it as | |
1870 | "union {...}". */ | |
1871 | TYPE_TAG_NAME (type) = NULL; | |
1872 | INIT_CPLUS_SPECIFIC (type); | |
1873 | TYPE_LENGTH (type) = 0; | |
1874 | TYPE_FIELDS (type) = 0; | |
1875 | TYPE_NFIELDS (type) = 0; | |
1876 | } | |
1877 | else | |
1878 | { | |
1879 | type = coff_read_struct_type (cs->c_symnum, | |
c906108c | 1880 | aux->x_sym.x_misc.x_lnsz.x_size, |
c5aa993b JM |
1881 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); |
1882 | } | |
1883 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1884 | return type; | |
c906108c | 1885 | |
c5aa993b JM |
1886 | case T_ENUM: |
1887 | if (cs->c_naux != 1) | |
1888 | { | |
1889 | /* anonymous enum type */ | |
1890 | type = coff_alloc_type (cs->c_symnum); | |
1891 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
1892 | TYPE_NAME (type) = NULL; | |
1893 | /* This used to set the tag to "<opaque>". But I think setting it | |
1894 | to NULL is right, and the printing code can print it as | |
1895 | "enum {...}". */ | |
1896 | TYPE_TAG_NAME (type) = NULL; | |
1897 | TYPE_LENGTH (type) = 0; | |
1898 | TYPE_FIELDS (type) = 0; | |
1899 | TYPE_NFIELDS (type) = 0; | |
1900 | } | |
1901 | else | |
1902 | { | |
1903 | type = coff_read_enum_type (cs->c_symnum, | |
1904 | aux->x_sym.x_misc.x_lnsz.x_size, | |
1905 | aux->x_sym.x_fcnary.x_fcn.x_endndx.l); | |
1906 | } | |
1907 | return type; | |
1908 | ||
1909 | case T_MOE: | |
1910 | /* shouldn't show up here */ | |
1911 | break; | |
c906108c | 1912 | |
c5aa993b JM |
1913 | case T_UCHAR: |
1914 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); | |
c906108c | 1915 | |
c5aa993b JM |
1916 | case T_USHORT: |
1917 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); | |
c906108c | 1918 | |
c5aa993b JM |
1919 | case T_UINT: |
1920 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); | |
c906108c | 1921 | |
c5aa993b JM |
1922 | case T_ULONG: |
1923 | if (cs->c_sclass == C_FIELD | |
1924 | && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) | |
1925 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); | |
1926 | else | |
1927 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG); | |
c906108c | 1928 | } |
23136709 | 1929 | complaint (&symfile_complaints, "Unexpected type for symbol %s", cs->c_name); |
c906108c SS |
1930 | return lookup_fundamental_type (current_objfile, FT_VOID); |
1931 | } | |
1932 | \f | |
1933 | /* This page contains subroutines of read_type. */ | |
1934 | ||
1935 | /* Read the description of a structure (or union type) and return an | |
1936 | object describing the type. */ | |
1937 | ||
1938 | static struct type * | |
fba45db2 | 1939 | coff_read_struct_type (int index, int length, int lastsym) |
c906108c SS |
1940 | { |
1941 | struct nextfield | |
1942 | { | |
1943 | struct nextfield *next; | |
1944 | struct field field; | |
1945 | }; | |
1946 | ||
1947 | register struct type *type; | |
1948 | register struct nextfield *list = 0; | |
1949 | struct nextfield *new; | |
1950 | int nfields = 0; | |
1951 | register int n; | |
1952 | char *name; | |
1953 | struct coff_symbol member_sym; | |
1954 | register struct coff_symbol *ms = &member_sym; | |
1955 | struct internal_syment sub_sym; | |
1956 | union internal_auxent sub_aux; | |
1957 | int done = 0; | |
1958 | ||
1959 | type = coff_alloc_type (index); | |
1960 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
c5aa993b | 1961 | INIT_CPLUS_SPECIFIC (type); |
c906108c SS |
1962 | TYPE_LENGTH (type) = length; |
1963 | ||
1964 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
1965 | { | |
1966 | read_one_sym (ms, &sub_sym, &sub_aux); | |
1967 | name = ms->c_name; | |
1968 | name = EXTERNAL_NAME (name, current_objfile->obfd); | |
1969 | ||
1970 | switch (ms->c_sclass) | |
1971 | { | |
c5aa993b JM |
1972 | case C_MOS: |
1973 | case C_MOU: | |
1974 | ||
1975 | /* Get space to record the next field's data. */ | |
1976 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1977 | new->next = list; | |
1978 | list = new; | |
1979 | ||
1980 | /* Save the data. */ | |
1981 | list->field.name = | |
1982 | obsavestring (name, | |
1983 | strlen (name), | |
1984 | ¤t_objfile->symbol_obstack); | |
1985 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); | |
1986 | FIELD_BITPOS (list->field) = 8 * ms->c_value; | |
1987 | FIELD_BITSIZE (list->field) = 0; | |
01ad7f36 | 1988 | FIELD_STATIC_KIND (list->field) = 0; |
c5aa993b JM |
1989 | nfields++; |
1990 | break; | |
c906108c | 1991 | |
c5aa993b JM |
1992 | case C_FIELD: |
1993 | ||
1994 | /* Get space to record the next field's data. */ | |
1995 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1996 | new->next = list; | |
1997 | list = new; | |
1998 | ||
1999 | /* Save the data. */ | |
2000 | list->field.name = | |
2001 | obsavestring (name, | |
2002 | strlen (name), | |
2003 | ¤t_objfile->symbol_obstack); | |
2004 | FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); | |
2005 | FIELD_BITPOS (list->field) = ms->c_value; | |
2006 | FIELD_BITSIZE (list->field) = sub_aux.x_sym.x_misc.x_lnsz.x_size; | |
01ad7f36 | 2007 | FIELD_STATIC_KIND (list->field) = 0; |
c5aa993b JM |
2008 | nfields++; |
2009 | break; | |
c906108c | 2010 | |
c5aa993b JM |
2011 | case C_EOS: |
2012 | done = 1; | |
2013 | break; | |
c906108c SS |
2014 | } |
2015 | } | |
2016 | /* Now create the vector of fields, and record how big it is. */ | |
2017 | ||
2018 | TYPE_NFIELDS (type) = nfields; | |
2019 | TYPE_FIELDS (type) = (struct field *) | |
2020 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
2021 | ||
2022 | /* Copy the saved-up fields into the field vector. */ | |
2023 | ||
2024 | for (n = nfields; list; list = list->next) | |
2025 | TYPE_FIELD (type, --n) = list->field; | |
2026 | ||
2027 | return type; | |
2028 | } | |
2029 | \f | |
2030 | /* Read a definition of an enumeration type, | |
2031 | and create and return a suitable type object. | |
2032 | Also defines the symbols that represent the values of the type. */ | |
2033 | ||
2034 | /* ARGSUSED */ | |
2035 | static struct type * | |
fba45db2 | 2036 | coff_read_enum_type (int index, int length, int lastsym) |
c906108c SS |
2037 | { |
2038 | register struct symbol *sym; | |
2039 | register struct type *type; | |
2040 | int nsyms = 0; | |
2041 | int done = 0; | |
2042 | struct pending **symlist; | |
2043 | struct coff_symbol member_sym; | |
2044 | register struct coff_symbol *ms = &member_sym; | |
2045 | struct internal_syment sub_sym; | |
2046 | union internal_auxent sub_aux; | |
2047 | struct pending *osyms, *syms; | |
2048 | int o_nsyms; | |
2049 | register int n; | |
2050 | char *name; | |
2051 | int unsigned_enum = 1; | |
2052 | ||
2053 | type = coff_alloc_type (index); | |
2054 | if (within_function) | |
2055 | symlist = &local_symbols; | |
2056 | else | |
2057 | symlist = &file_symbols; | |
2058 | osyms = *symlist; | |
2059 | o_nsyms = osyms ? osyms->nsyms : 0; | |
2060 | ||
2061 | while (!done && symnum < lastsym && symnum < nlist_nsyms_global) | |
2062 | { | |
2063 | read_one_sym (ms, &sub_sym, &sub_aux); | |
2064 | name = ms->c_name; | |
2065 | name = EXTERNAL_NAME (name, current_objfile->obfd); | |
2066 | ||
2067 | switch (ms->c_sclass) | |
2068 | { | |
c5aa993b JM |
2069 | case C_MOE: |
2070 | sym = (struct symbol *) obstack_alloc | |
2071 | (¤t_objfile->symbol_obstack, | |
2072 | sizeof (struct symbol)); | |
2073 | memset (sym, 0, sizeof (struct symbol)); | |
2074 | ||
2075 | SYMBOL_NAME (sym) = | |
2076 | obsavestring (name, strlen (name), | |
2077 | ¤t_objfile->symbol_obstack); | |
2078 | SYMBOL_CLASS (sym) = LOC_CONST; | |
2079 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2080 | SYMBOL_VALUE (sym) = ms->c_value; | |
2081 | add_symbol_to_list (sym, symlist); | |
2082 | nsyms++; | |
2083 | break; | |
c906108c | 2084 | |
c5aa993b JM |
2085 | case C_EOS: |
2086 | /* Sometimes the linker (on 386/ix 2.0.2 at least) screws | |
2087 | up the count of how many symbols to read. So stop | |
2088 | on .eos. */ | |
2089 | done = 1; | |
2090 | break; | |
c906108c SS |
2091 | } |
2092 | } | |
2093 | ||
2094 | /* Now fill in the fields of the type-structure. */ | |
2095 | ||
2096 | if (length > 0) | |
2097 | TYPE_LENGTH (type) = length; | |
2098 | else | |
c5aa993b | 2099 | TYPE_LENGTH (type) = TARGET_INT_BIT / TARGET_CHAR_BIT; /* Assume ints */ |
c906108c SS |
2100 | TYPE_CODE (type) = TYPE_CODE_ENUM; |
2101 | TYPE_NFIELDS (type) = nsyms; | |
2102 | TYPE_FIELDS (type) = (struct field *) | |
2103 | TYPE_ALLOC (type, sizeof (struct field) * nsyms); | |
2104 | ||
2105 | /* Find the symbols for the values and put them into the type. | |
2106 | The symbols can be found in the symlist that we put them on | |
2107 | to cause them to be defined. osyms contains the old value | |
2108 | of that symlist; everything up to there was defined by us. */ | |
2109 | /* Note that we preserve the order of the enum constants, so | |
2110 | that in something like "enum {FOO, LAST_THING=FOO}" we print | |
2111 | FOO, not LAST_THING. */ | |
2112 | ||
2113 | for (syms = *symlist, n = 0; syms; syms = syms->next) | |
2114 | { | |
2115 | int j = 0; | |
2116 | ||
2117 | if (syms == osyms) | |
2118 | j = o_nsyms; | |
c5aa993b | 2119 | for (; j < syms->nsyms; j++, n++) |
c906108c SS |
2120 | { |
2121 | struct symbol *xsym = syms->symbol[j]; | |
2122 | SYMBOL_TYPE (xsym) = type; | |
2123 | TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym); | |
2124 | TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym); | |
2125 | if (SYMBOL_VALUE (xsym) < 0) | |
2126 | unsigned_enum = 0; | |
2127 | TYPE_FIELD_BITSIZE (type, n) = 0; | |
01ad7f36 | 2128 | TYPE_FIELD_STATIC_KIND (type, n) = 0; |
c906108c SS |
2129 | } |
2130 | if (syms == osyms) | |
2131 | break; | |
2132 | } | |
2133 | ||
2134 | if (unsigned_enum) | |
2135 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; | |
2136 | ||
2137 | return type; | |
2138 | } | |
2139 | ||
2140 | /* Register our ability to parse symbols for coff BFD files. */ | |
2141 | ||
2142 | static struct sym_fns coff_sym_fns = | |
2143 | { | |
2144 | bfd_target_coff_flavour, | |
c5aa993b JM |
2145 | coff_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
2146 | coff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
2147 | coff_symfile_read, /* sym_read: read a symbol file into symtab */ | |
2148 | coff_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
96baa820 | 2149 | default_symfile_offsets, /* sym_offsets: xlate external to internal form */ |
c5aa993b | 2150 | NULL /* next: pointer to next struct sym_fns */ |
c906108c SS |
2151 | }; |
2152 | ||
2153 | void | |
fba45db2 | 2154 | _initialize_coffread (void) |
c906108c SS |
2155 | { |
2156 | add_symtab_fns (&coff_sym_fns); | |
2157 | } |