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e38e0312 JG |
1 | /* Read AIXcoff symbol tables and convert to internal format, for GDB. |
2 | Copyright (C) 1986-1991 Free Software Foundation, Inc. | |
3 | Derived from coffread.c, dbxread.c, and a lot of hacking. | |
4 | Contributed by IBM Corporation. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
3ae444f8 | 22 | #include <stdio.h> |
e38e0312 JG |
23 | #include "defs.h" |
24 | #include "bfd.h" | |
e38e0312 | 25 | |
e38e0312 JG |
26 | /* AIX COFF names have a preceeding dot `.' */ |
27 | #define NAMES_HAVE_DOT 1 | |
28 | ||
29 | #include <sys/types.h> | |
30 | #include <fcntl.h> | |
31 | #include <ctype.h> | |
32 | ||
33 | #include "obstack.h" | |
34 | #include <sys/param.h> | |
5e4d4b0f | 35 | #ifndef NO_SYS_FILE |
e38e0312 | 36 | #include <sys/file.h> |
5e4d4b0f | 37 | #endif |
e38e0312 JG |
38 | #include <sys/stat.h> |
39 | ||
40 | #include "symtab.h" | |
1ab3bf1b | 41 | #include "gdbtypes.h" |
e38e0312 JG |
42 | #include "symfile.h" |
43 | #include "buildsym.h" | |
44 | ||
f5f0679a | 45 | #include "coff/internal.h" /* FIXME, internal data from BFD */ |
e38e0312 | 46 | #include "libcoff.h" /* FIXME, internal data from BFD */ |
f5f0679a | 47 | #include "coff/rs6000.h" /* FIXME, raw file-format guts of xcoff */ |
e38e0312 | 48 | |
e38e0312 JG |
49 | /* Simplified internal version of coff symbol table information */ |
50 | ||
51 | struct coff_symbol { | |
52 | char *c_name; | |
53 | int c_symnum; /* symbol number of this entry */ | |
54 | int c_nsyms; /* 0 if syment only, 1 if syment + auxent */ | |
55 | long c_value; | |
56 | int c_sclass; | |
57 | int c_secnum; | |
58 | unsigned int c_type; | |
59 | }; | |
60 | ||
61 | /* The COFF line table, in raw form. */ | |
62 | static char *linetab = NULL; /* Its actual contents */ | |
63 | static long linetab_offset; /* Its offset in the file */ | |
64 | static unsigned long linetab_size; /* Its size */ | |
65 | ||
66 | /* last function's saved coff symbol `cs' */ | |
67 | ||
68 | static struct coff_symbol fcn_cs_saved; | |
69 | ||
70 | static bfd *symfile_bfd; | |
71 | ||
72 | /* Core address of start and end of text of current source file. | |
73 | This is calculated from the first function seen after a C_FILE | |
74 | symbol. */ | |
75 | ||
76 | static CORE_ADDR cur_src_start_addr; | |
77 | static CORE_ADDR cur_src_end_addr; | |
78 | ||
79 | /* Core address of the end of the first object file. */ | |
80 | ||
81 | static CORE_ADDR first_object_file_end; | |
82 | ||
83 | /* pointer to the string table */ | |
84 | static char *strtbl; | |
85 | ||
86 | /* length of the string table */ | |
87 | static int strtbl_len; | |
88 | ||
89 | /* pointer to debug section */ | |
90 | static char *debugsec; | |
91 | ||
92 | /* pointer to the a.out symbol table */ | |
93 | static char *symtbl; | |
94 | ||
95 | /* initial symbol-table-debug-string vector length */ | |
96 | ||
97 | #define INITIAL_STABVECTOR_LENGTH 40 | |
98 | ||
99 | struct pending_stabs *global_stabs; | |
100 | struct pending_stabs *file_stabs; | |
101 | ||
102 | /* Nonzero if within a function (so symbols should be local, | |
103 | if nothing says specifically). */ | |
104 | ||
105 | int within_function; | |
106 | ||
107 | /* Local variables that hold the shift and mask values for the | |
108 | COFF file that we are currently reading. These come back to us | |
109 | from BFD, and are referenced by their macro names, as well as | |
110 | internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF | |
111 | macros from ../internalcoff.h . */ | |
112 | ||
113 | static unsigned local_n_btshft; | |
114 | static unsigned local_n_tmask; | |
115 | ||
116 | #undef N_BTSHFT | |
117 | #define N_BTSHFT local_n_btshft | |
118 | #undef N_TMASK | |
119 | #define N_TMASK local_n_tmask | |
120 | ||
121 | /* Local variables that hold the sizes in the file of various COFF structures. | |
122 | (We only need to know this to read them from the file -- BFD will then | |
123 | translate the data in them, into `internal_xxx' structs in the right | |
124 | byte order, alignment, etc.) */ | |
125 | ||
126 | static unsigned local_symesz; | |
127 | ||
128 | /* coff_symfile_init() | |
129 | is the coff-specific initialization routine for reading symbols. | |
130 | It is passed a struct sym_fns which contains, among other things, | |
131 | the BFD for the file whose symbols are being read, and a slot for | |
132 | a pointer to "private data" which we fill with cookies and other | |
133 | treats for coff_symfile_read(). | |
134 | ||
135 | We will only be called if this is a COFF or COFF-like file. | |
136 | BFD handles figuring out the format of the file, and code in symtab.c | |
137 | uses BFD's determination to vector to us. | |
138 | ||
139 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ | |
140 | ||
141 | struct coff_symfile_info { | |
142 | file_ptr min_lineno_offset; /* Where in file lowest line#s are */ | |
143 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ | |
144 | }; | |
145 | ||
146 | ||
1ab3bf1b JG |
147 | static void |
148 | enter_line_range PARAMS ((struct subfile *, unsigned, unsigned, CORE_ADDR, | |
149 | unsigned *)); | |
150 | ||
151 | static void | |
152 | aixcoff_symfile_read PARAMS ((struct sym_fns *, CORE_ADDR, int)); | |
153 | ||
154 | static void | |
155 | free_debugsection PARAMS ((void)); | |
156 | ||
157 | static int | |
158 | init_debugsection PARAMS ((bfd *)); | |
159 | ||
160 | static int | |
161 | init_stringtab PARAMS ((bfd *, long, struct objfile *)); | |
162 | ||
163 | static void | |
164 | aixcoff_symfile_init PARAMS ((struct sym_fns *)); | |
165 | ||
166 | static void | |
167 | aixcoff_new_init PARAMS ((void)); | |
168 | ||
1ab3bf1b JG |
169 | static int |
170 | init_lineno PARAMS ((bfd *, long, int)); | |
171 | ||
172 | static void | |
173 | find_linenos PARAMS ((bfd *, sec_ptr, PTR)); | |
174 | ||
175 | static int | |
176 | read_symbol_lineno PARAMS ((char *, int)); | |
177 | ||
178 | static int | |
179 | read_symbol_nvalue PARAMS ((char *, int)); | |
180 | ||
181 | static struct symbol * | |
182 | process_xcoff_symbol PARAMS ((struct coff_symbol *, struct objfile *)); | |
183 | ||
184 | static void | |
185 | read_xcoff_symtab PARAMS ((struct objfile *, int)); | |
186 | ||
187 | static void | |
188 | enter_line_range PARAMS ((struct subfile *, unsigned, unsigned, CORE_ADDR, | |
189 | unsigned *)); | |
190 | ||
191 | static void | |
192 | add_stab_to_list PARAMS ((char *, struct pending_stabs **)); | |
193 | ||
194 | static void | |
195 | sort_syms PARAMS ((void)); | |
196 | ||
197 | static int | |
198 | compare_symbols PARAMS ((const void *, const void *)); | |
199 | ||
e38e0312 JG |
200 | /* Call sort_syms to sort alphabetically |
201 | the symbols of each block of each symtab. */ | |
202 | ||
203 | static int | |
1ab3bf1b JG |
204 | compare_symbols (s1p, s2p) |
205 | const PTR s1p; | |
206 | const PTR s2p; | |
e38e0312 JG |
207 | { |
208 | /* Names that are less should come first. */ | |
1ab3bf1b JG |
209 | register struct symbol **s1 = (struct symbol **) s1p; |
210 | register struct symbol **s2 = (struct symbol **) s2p; | |
e38e0312 JG |
211 | register int namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2)); |
212 | if (namediff != 0) | |
213 | return namediff; | |
214 | ||
215 | /* For symbols of the same name, registers should come first. */ | |
216 | return ((SYMBOL_CLASS (*s2) == LOC_REGISTER) | |
217 | - (SYMBOL_CLASS (*s1) == LOC_REGISTER)); | |
218 | } | |
219 | ||
220 | ||
221 | /* Sort a vector of symbols by their value. */ | |
222 | ||
223 | static void | |
224 | sort_syms () | |
225 | { | |
226 | register struct symtab *s; | |
1ab3bf1b | 227 | register struct objfile *objfile; |
e38e0312 JG |
228 | register int i, nbl; |
229 | register struct blockvector *bv; | |
230 | register struct block *b; | |
231 | ||
1ab3bf1b | 232 | for (objfile = object_files; objfile != NULL; objfile = objfile -> next) |
e38e0312 | 233 | { |
1ab3bf1b JG |
234 | for (s = objfile -> symtabs; s != NULL; s = s -> next) |
235 | { | |
236 | bv = BLOCKVECTOR (s); | |
237 | nbl = BLOCKVECTOR_NBLOCKS (bv); | |
238 | for (i = 0; i < nbl; i++) | |
239 | { | |
240 | b = BLOCKVECTOR_BLOCK (bv, i); | |
241 | if (BLOCK_SHOULD_SORT (b)) | |
242 | { | |
243 | qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), | |
244 | sizeof (struct symbol *), compare_symbols); | |
245 | } | |
246 | } | |
247 | } | |
e38e0312 | 248 | } |
e38e0312 JG |
249 | } |
250 | ||
251 | ||
252 | /* add a given stab string into given stab vector. */ | |
253 | ||
254 | static void | |
255 | add_stab_to_list (stabname, stabvector) | |
256 | char *stabname; | |
257 | struct pending_stabs **stabvector; | |
258 | { | |
259 | if ( *stabvector == NULL) { | |
260 | *stabvector = (struct pending_stabs *) | |
261 | xmalloc (sizeof (struct pending_stabs) + | |
262 | INITIAL_STABVECTOR_LENGTH * sizeof (char*)); | |
263 | (*stabvector)->count = 0; | |
264 | (*stabvector)->length = INITIAL_STABVECTOR_LENGTH; | |
265 | } | |
266 | else if ((*stabvector)->count >= (*stabvector)->length) { | |
267 | (*stabvector)->length += INITIAL_STABVECTOR_LENGTH; | |
268 | *stabvector = (struct pending_stabs *) | |
1ab3bf1b | 269 | xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) + |
e38e0312 JG |
270 | (*stabvector)->length * sizeof (char*)); |
271 | } | |
272 | (*stabvector)->stab [(*stabvector)->count++] = stabname; | |
273 | } | |
274 | ||
275 | ||
e38e0312 JG |
276 | /* Enter a given range of lines into the line vector. |
277 | can be called in the following two ways: | |
278 | enter_line_range (subfile, beginoffset, endoffset, 0, firstLine) or | |
279 | enter_line_range (subfile, beginoffset, 0, endaddr, firstLine) */ | |
280 | ||
281 | static void | |
282 | enter_line_range (subfile, beginoffset, endoffset, endaddr, firstLine) | |
283 | struct subfile *subfile; /* which sub-file to put line#s in */ | |
284 | unsigned beginoffset, endoffset; /* offsets to line table */ | |
285 | CORE_ADDR endaddr; | |
286 | unsigned *firstLine; | |
287 | { | |
288 | char *pp, *limit; | |
289 | CORE_ADDR addr; | |
290 | struct internal_lineno lptr; | |
291 | unsigned local_linesz = coff_data (symfile_bfd)->local_linesz; | |
292 | ||
293 | pp = &linetab [beginoffset - linetab_offset]; | |
294 | limit = endoffset ? &linetab [endoffset - linetab_offset] | |
295 | : &linetab [linetab_size -1]; | |
296 | ||
297 | while (pp <= limit) { | |
298 | ||
299 | /* Swap and align this lineno entry into lptr. */ | |
300 | bfd_coff_swap_lineno_in (symfile_bfd, pp, &lptr); | |
301 | ||
302 | /* find the address this line represents */ | |
303 | addr = lptr.l_lnno ? | |
304 | lptr.l_addr.l_paddr : read_symbol_nvalue (symtbl, lptr.l_addr.l_symndx); | |
305 | ||
306 | if (endaddr && addr >= endaddr) | |
307 | return; | |
308 | ||
309 | if (lptr.l_lnno == 0) { | |
310 | *firstLine = read_symbol_lineno (symtbl, lptr.l_addr.l_symndx); | |
311 | --(*firstLine); | |
312 | } | |
313 | else | |
314 | record_line (subfile, *firstLine + lptr.l_lnno, addr); | |
315 | ||
316 | pp += local_linesz; | |
317 | } | |
318 | } | |
319 | ||
320 | ||
321 | /* Save the vital information for use when closing off the current file. | |
322 | NAME is the file name the symbols came from, START_ADDR is the first | |
323 | text address for the file, and SIZE is the number of bytes of text. */ | |
324 | ||
325 | #define complete_symtab(name, start_addr) { \ | |
326 | last_source_file = savestring (name, strlen (name)); \ | |
327 | cur_src_start_addr = start_addr; \ | |
328 | } | |
329 | ||
330 | ||
331 | /* Refill the symbol table input buffer | |
332 | and set the variables that control fetching entries from it. | |
333 | Reports an error if no data available. | |
334 | This function can read past the end of the symbol table | |
335 | (into the string table) but this does no harm. */ | |
336 | ||
337 | /* Reading symbol table has to be fast! Keep the followings as macros, rather | |
338 | than functions. */ | |
339 | ||
1ab3bf1b | 340 | #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, ALLOCED) \ |
e38e0312 JG |
341 | { \ |
342 | char *namestr; \ | |
343 | if (ALLOCED) \ | |
344 | namestr = (NAME) + 1; \ | |
345 | else { \ | |
1ab3bf1b | 346 | namestr = obstack_copy0 (&objfile->symbol_obstack, (NAME) + 1, strlen ((NAME)+1)); \ |
e38e0312 JG |
347 | (ALLOCED) = 1; \ |
348 | } \ | |
1ab3bf1b | 349 | prim_record_minimal_symbol (namestr, (ADDR), (TYPE)); \ |
e38e0312 JG |
350 | last_recorded_fun = (ADDR); \ |
351 | } | |
352 | ||
353 | ||
354 | ||
355 | /* aixcoff has static blocks marked in `.bs', `.es' pairs. They cannot be | |
356 | nested. At any given time, a symbol can only be in one static block. | |
357 | This is the base address of current static block, zero if non exists. */ | |
358 | ||
359 | static int static_block_base = 0; | |
360 | ||
361 | /* true if space for symbol name has been allocated. */ | |
362 | ||
363 | static int symname_alloced = 0; | |
364 | ||
365 | /* read the whole symbol table of a given bfd. */ | |
366 | ||
1ab3bf1b | 367 | static void |
e38e0312 JG |
368 | read_xcoff_symtab (objfile, nsyms) |
369 | struct objfile *objfile; /* Object file we're reading from */ | |
370 | int nsyms; /* # of symbols */ | |
371 | { | |
372 | bfd *abfd = objfile->obfd; | |
373 | /* char *symtbl; */ /* Raw symbol table base */ | |
374 | char *raw_symbol; /* Pointer into raw seething symbol table */ | |
375 | char *raw_auxptr; /* Pointer to first raw aux entry for sym */ | |
376 | struct internal_syment symbol[1]; | |
377 | union internal_auxent main_aux[1]; | |
378 | struct coff_symbol cs[1]; | |
379 | CORE_ADDR file_start_addr = 0; | |
380 | CORE_ADDR file_end_addr = 0; | |
381 | ||
382 | int next_file_symnum = -1; | |
383 | int just_started = 1; | |
384 | int depth = 0; | |
385 | int val; | |
386 | int fcn_first_line; | |
387 | int fcn_last_line; | |
388 | int fcn_start_addr; | |
389 | long fcn_line_offset; | |
390 | size_t size; | |
391 | ||
392 | /* fcn_cs_saved is global because process_xcoff_symbol needs it. */ | |
393 | union internal_auxent fcn_aux_saved; | |
394 | struct context_stack *new; | |
395 | ||
396 | char *filestring = " _start_ "; /* Name of the current file. */ | |
397 | char *last_seen_csect; | |
398 | int last_recorded_fun = 0; /* last recorded fun. value */ | |
399 | ||
1ab3bf1b JG |
400 | current_objfile = objfile; |
401 | ||
e38e0312 JG |
402 | /* Get the appropriate COFF "constants" related to the file we're handling. */ |
403 | N_TMASK = coff_data (abfd)->local_n_tmask; | |
404 | N_BTSHFT = coff_data (abfd)->local_n_btshft; | |
405 | local_symesz = coff_data (abfd)->local_symesz; | |
406 | ||
407 | last_source_file = 0; | |
408 | last_seen_csect = 0; | |
409 | last_recorded_fun = 0; | |
410 | ||
411 | start_symtab (filestring, (char *)NULL, file_start_addr); | |
412 | symnum = 0; | |
413 | first_object_file_end = 0; | |
414 | ||
415 | /* Allocate space for the entire symbol table at once, and read it | |
416 | all in. The bfd is already positioned at the beginning of | |
417 | the symbol table. */ | |
418 | ||
419 | size = coff_data (abfd)->local_symesz * nsyms; | |
420 | symtbl = xmalloc (size); | |
421 | ||
422 | val = bfd_read (symtbl, size, 1, abfd); | |
423 | if (val != size) | |
424 | perror_with_name ("reading symbol table"); | |
425 | ||
426 | raw_symbol = symtbl; | |
427 | ||
428 | while (symnum < nsyms) { | |
429 | ||
430 | QUIT; /* make this command interruptable. */ | |
431 | ||
432 | /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */ | |
433 | /* read one symbol into `cs' structure. After processing the whole symbol | |
434 | table, only string table will be kept in memory, symbol table and debug | |
435 | section of aixcoff will be freed. Thus we can mark symbols with names | |
436 | in string table as `alloced'. */ | |
437 | { | |
438 | int ii; | |
439 | ||
440 | /* Swap and align the symbol into a reasonable C structure. */ | |
441 | bfd_coff_swap_sym_in (abfd, raw_symbol, symbol); | |
442 | ||
443 | cs->c_symnum = symnum; | |
444 | cs->c_nsyms = symbol->n_numaux; | |
445 | if (symbol->n_zeroes) { | |
446 | symname_alloced = 0; | |
447 | /* We must use the original, unswapped, name here so the name field | |
448 | pointed to by cs->c_name will persist throughout xcoffread. If | |
449 | we use the new field, it gets overwritten for each symbol. */ | |
450 | cs->c_name = ((struct external_syment *)raw_symbol)->e.e_name; | |
451 | } else if (symbol->n_sclass & 0x80) { | |
452 | cs->c_name = debugsec + symbol->n_offset; | |
453 | symname_alloced = 0; | |
454 | } else { /* in string table */ | |
455 | cs->c_name = strtbl + (int)symbol->n_offset; | |
456 | symname_alloced = 1; | |
457 | } | |
458 | cs->c_value = symbol->n_value; | |
459 | cs->c_sclass = symbol->n_sclass & 0xff; | |
460 | cs->c_secnum = symbol->n_scnum; | |
461 | cs->c_type = (unsigned)symbol->n_type; | |
462 | ||
463 | raw_symbol += coff_data (abfd)->local_symesz; | |
464 | ++symnum; | |
465 | ||
466 | raw_auxptr = raw_symbol; /* Save addr of first aux entry */ | |
467 | ||
468 | /* Skip all the auxents associated with this symbol. */ | |
469 | for (ii = symbol->n_numaux; ii; --ii ) { | |
470 | raw_symbol += coff_data (abfd)->local_auxesz; | |
471 | ++symnum; | |
472 | } | |
473 | } | |
474 | ||
475 | /* if symbol name starts with ".$" or "$", ignore it. */ | |
476 | if (cs->c_name[0] == '$' || (cs->c_name[1] == '$' && cs->c_name[0] == '.')) | |
477 | continue; | |
478 | ||
479 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) { | |
480 | if (last_source_file) | |
481 | end_symtab (cur_src_end_addr, 1, 1, objfile); | |
482 | ||
483 | start_symtab ("_globals_", (char *)NULL, (CORE_ADDR)0); | |
484 | cur_src_end_addr = first_object_file_end; | |
485 | /* done with all files, everything from here on is globals */ | |
486 | } | |
487 | ||
488 | /* if explicitly specified as a function, treat is as one. */ | |
489 | if (ISFCN(cs->c_type) && cs->c_sclass != C_TPDEF) { | |
490 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, | |
491 | main_aux); | |
492 | goto function_entry_point; | |
493 | } | |
494 | ||
495 | if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT) && cs->c_nsyms == 1) | |
496 | { | |
497 | /* dealing with a symbol with a csect entry. */ | |
498 | ||
499 | # define CSECT(PP) ((PP)->x_csect) | |
500 | # define CSECT_LEN(PP) (CSECT(PP).x_scnlen) | |
501 | # define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp)) | |
502 | # define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp)) | |
503 | # define CSECT_SCLAS(PP) (CSECT(PP).x_smclas) | |
504 | ||
505 | /* Convert the auxent to something we can access. */ | |
506 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, | |
507 | main_aux); | |
508 | ||
509 | switch (CSECT_SMTYP (main_aux)) { | |
510 | ||
511 | case XTY_ER : | |
512 | continue; /* ignore all external references. */ | |
513 | ||
514 | case XTY_SD : /* a section description. */ | |
515 | { | |
516 | switch (CSECT_SCLAS (main_aux)) { | |
517 | ||
518 | case XMC_PR : /* a `.text' csect. */ | |
519 | { | |
520 | ||
521 | /* A program csect is seen. | |
522 | ||
523 | We have to allocate one symbol table for each program csect. Normally | |
524 | gdb prefers one symtab for each compilation unit (CU). In case of AIX, one | |
525 | CU might include more than one prog csect, and they don't have to be | |
526 | adjacent in terms of the space they occupy in memory. Thus, one single | |
527 | CU might get fragmented in the memory and gdb's file start and end address | |
528 | approach does not work! */ | |
529 | ||
530 | if (last_seen_csect) { | |
531 | complete_symtab (filestring, file_start_addr); | |
532 | cur_src_end_addr = file_end_addr; | |
533 | end_symtab (file_end_addr, 1, 1, objfile); | |
534 | start_symtab ((char *)NULL, (char *)NULL, (CORE_ADDR)0); | |
535 | } | |
536 | ||
537 | /* If this is the very first csect seen, basically `__start'. */ | |
538 | if (just_started) { | |
539 | first_object_file_end = cs->c_value + CSECT_LEN (main_aux); | |
540 | just_started = 0; | |
541 | } | |
542 | ||
543 | file_start_addr = cs->c_value; | |
544 | file_end_addr = cs->c_value + CSECT_LEN (main_aux); | |
545 | ||
546 | if (cs->c_name && cs->c_name[0] == '.') { | |
547 | last_seen_csect = cs->c_name; | |
1ab3bf1b | 548 | RECORD_MINIMAL_SYMBOL (cs->c_name, cs->c_value, mst_text, symname_alloced); |
e38e0312 JG |
549 | } |
550 | } | |
551 | continue; | |
552 | ||
553 | case XMC_RW : | |
554 | break; | |
555 | ||
556 | /* If the section is not a data description, ignore it. Note that | |
557 | uninitialized data will show up as XTY_CM/XMC_RW pair. */ | |
558 | ||
559 | case XMC_TC0: | |
560 | #ifdef XCOFF_ADD_TOC_TO_LOADINFO | |
561 | XCOFF_ADD_TOC_TO_LOADINFO (cs->c_value); | |
562 | #endif | |
563 | /* fall down to default case. */ | |
564 | ||
565 | case XMC_TC : /* ignore toc entries */ | |
566 | default : /* any other XMC_XXX */ | |
567 | continue; | |
568 | } | |
569 | } | |
570 | break; /* switch CSECT_SCLAS() */ | |
571 | ||
572 | case XTY_LD : | |
573 | ||
574 | /* a function entry point. */ | |
575 | if (CSECT_SCLAS (main_aux) == XMC_PR) { | |
576 | ||
577 | function_entry_point: | |
578 | if (cs->c_value != last_recorded_fun) | |
1ab3bf1b | 579 | RECORD_MINIMAL_SYMBOL (cs->c_name, cs->c_value, mst_text, |
e38e0312 JG |
580 | symname_alloced); |
581 | ||
582 | fcn_line_offset = main_aux->x_sym.x_fcnary.x_fcn.x_lnnoptr; | |
583 | fcn_start_addr = cs->c_value; | |
584 | ||
585 | /* save the function header info, which will be used | |
586 | when `.bf' is seen. */ | |
587 | fcn_cs_saved = *cs; | |
588 | fcn_aux_saved = *main_aux; | |
589 | continue; | |
590 | } | |
591 | ||
592 | /* shared library function entry point. */ | |
593 | else if (CSECT_SCLAS (main_aux) == XMC_GL) { | |
594 | if (last_recorded_fun != cs->c_value) | |
1ab3bf1b | 595 | RECORD_MINIMAL_SYMBOL (cs->c_name, cs->c_value, mst_text, |
e38e0312 JG |
596 | symname_alloced); |
597 | continue; | |
598 | } | |
599 | break; | |
600 | ||
601 | default : /* all other XTY_XXXs */ | |
602 | break; | |
603 | } /* switch CSECT_SMTYP() */ | |
604 | } | |
605 | ||
606 | switch (cs->c_sclass) { | |
607 | ||
608 | case C_FILE: | |
609 | ||
610 | /* c_value field contains symnum of next .file entry in table | |
611 | or symnum of first global after last .file. */ | |
612 | ||
613 | next_file_symnum = cs->c_value; | |
614 | ||
615 | /* complete symbol table for last object file containing | |
616 | debugging information. */ | |
617 | ||
618 | /* Whether or not there was a csect in the previous file, we have | |
619 | to call `end_symtab' and `start_symtab' to reset type_vector, | |
620 | line_vector, etc. structures. */ | |
621 | complete_symtab (filestring, file_start_addr); | |
622 | cur_src_end_addr = file_end_addr; | |
623 | end_symtab (file_end_addr, 1, 1, objfile); | |
624 | start_symtab (cs->c_name, (char *)NULL, (CORE_ADDR)0); | |
625 | last_seen_csect = 0; | |
626 | ||
627 | /* reset file start and end addresses. A compilation unit with no text | |
628 | (only data) should have zero file boundaries. */ | |
629 | file_start_addr = file_end_addr = 0; | |
630 | ||
631 | filestring = cs->c_name; | |
632 | break; | |
633 | ||
634 | ||
635 | case C_FCN: | |
636 | if (strcmp (cs->c_name, ".bf") == 0) { | |
637 | ||
638 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, | |
639 | main_aux); | |
640 | ||
641 | within_function = 1; | |
642 | ||
643 | /* value contains address of first non-init type code */ | |
644 | /* main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
645 | contains line number of '{' } */ | |
646 | fcn_first_line = main_aux->x_sym.x_misc.x_lnsz.x_lnno; | |
647 | ||
648 | /* Linenos are now processed on a file-by-file, not fn-by-fn, basis. | |
649 | Metin did it, I'm not sure why. FIXME. -- gnu@cygnus.com */ | |
650 | /* mark_first_line (fcn_line_offset, cs->c_symnum); */ | |
651 | ||
652 | new = push_context (0, fcn_start_addr); | |
1ab3bf1b | 653 | new->name = process_xcoff_symbol (&fcn_cs_saved, objfile); |
e38e0312 JG |
654 | } |
655 | else if (strcmp (cs->c_name, ".ef") == 0) { | |
656 | ||
657 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, | |
658 | main_aux); | |
659 | ||
660 | /* the value of .ef is the address of epilogue code; | |
661 | not useful for gdb */ | |
662 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno | |
663 | contains number of lines to '}' */ | |
664 | ||
665 | fcn_last_line = main_aux->x_sym.x_misc.x_lnsz.x_lnno; | |
666 | #if 0 | |
667 | enter_linenos (fcn_line_offset, fcn_first_line, | |
668 | fcn_first_line + fcn_last_line); | |
669 | #endif | |
670 | ||
671 | new = pop_context (); | |
672 | if (context_stack_depth != 0) | |
673 | error ("invalid symbol data; .bf/.ef/.bb/.eb symbol mismatch, at symbol %d.", | |
674 | symnum); | |
675 | ||
676 | finish_block (new->name, &local_symbols, new->old_blocks, | |
677 | new->start_addr, | |
678 | fcn_cs_saved.c_value + | |
1ab3bf1b | 679 | fcn_aux_saved.x_sym.x_misc.x_fsize, objfile); |
e38e0312 JG |
680 | within_function = 0; |
681 | } | |
682 | break; | |
683 | ||
684 | case C_BSTAT : /* begin static block */ | |
685 | static_block_base = read_symbol_nvalue (symtbl, cs->c_value); | |
686 | break; | |
687 | ||
688 | case C_ESTAT : /* end of static block */ | |
689 | static_block_base = 0; | |
690 | break; | |
691 | ||
692 | case C_ARG : /* These are not implemented. */ | |
693 | case C_REGPARM : | |
694 | case C_TPDEF : | |
695 | case C_STRTAG : | |
696 | case C_UNTAG : | |
697 | case C_ENTAG : | |
698 | printf ("ERROR: Unimplemented storage class: %d.\n", cs->c_sclass); | |
699 | break; | |
700 | ||
701 | case C_HIDEXT : /* ignore these.. */ | |
702 | case C_LABEL : | |
703 | case C_NULL : | |
704 | break; | |
705 | ||
706 | case C_BINCL : /* beginning of include file */ | |
707 | push_subfile (); | |
708 | start_subfile (cs->c_name, (char *)0); | |
709 | fcn_first_line = cs->c_value; /* Offset to first lineno of file */ | |
710 | break; | |
711 | ||
712 | case C_EINCL : /* end of include file */ | |
713 | fcn_last_line = cs->c_value; /* Offset to last line number */ | |
714 | { long dummy = 0; | |
715 | enter_line_range (current_subfile, fcn_first_line, cs->c_value, 0, | |
1ab3bf1b | 716 | (unsigned *) &dummy); |
e38e0312 JG |
717 | } |
718 | start_subfile (pop_subfile (), (char *)0); | |
719 | break; | |
720 | ||
721 | case C_BLOCK : | |
722 | if (strcmp (cs->c_name, ".bb") == 0) { | |
723 | depth++; | |
724 | new = push_context (depth, cs->c_value); | |
725 | } | |
726 | else if (strcmp (cs->c_name, ".eb") == 0) { | |
727 | new = pop_context (); | |
728 | if (depth != new->depth) | |
729 | error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.", | |
730 | symnum); | |
731 | ||
732 | depth--; | |
733 | if (local_symbols && context_stack_depth > 0) { | |
734 | /* Make a block for the local symbols within. */ | |
735 | finish_block (new->name, &local_symbols, new->old_blocks, | |
1ab3bf1b | 736 | new->start_addr, cs->c_value, objfile); |
e38e0312 JG |
737 | } |
738 | local_symbols = new->locals; | |
739 | } | |
740 | break; | |
741 | ||
742 | default : | |
1ab3bf1b | 743 | (void) process_xcoff_symbol (cs, objfile); |
e38e0312 JG |
744 | break; |
745 | } | |
746 | ||
747 | } /* while */ | |
748 | ||
749 | if (last_source_file) | |
750 | end_symtab (cur_src_end_addr, 1, 1, objfile); | |
751 | ||
752 | free (symtbl); | |
1ab3bf1b | 753 | current_objfile = NULL; |
e38e0312 JG |
754 | } |
755 | ||
756 | #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \ | |
757 | (SYMBOL2) = (struct symbol *) \ | |
1ab3bf1b | 758 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \ |
e38e0312 JG |
759 | *(SYMBOL2) = *(SYMBOL1); |
760 | ||
761 | ||
762 | #define SYMNAME_ALLOC(NAME, ALLOCED) \ | |
1ab3bf1b | 763 | (ALLOCED) ? (NAME) : obstack_copy0 (&objfile->symbol_obstack, (NAME), strlen (NAME)); |
e38e0312 JG |
764 | |
765 | ||
766 | ||
767 | /* process one xcoff symbol. */ | |
768 | ||
769 | static struct symbol * | |
1ab3bf1b | 770 | process_xcoff_symbol (cs, objfile) |
e38e0312 | 771 | register struct coff_symbol *cs; |
1ab3bf1b | 772 | struct objfile *objfile; |
e38e0312 JG |
773 | { |
774 | struct symbol onesymbol; | |
775 | register struct symbol *sym = &onesymbol; | |
776 | struct symbol *sym2 = NULL; | |
777 | struct type *ttype; | |
778 | char *name, *pp, *qq; | |
779 | ||
780 | name = cs->c_name; | |
781 | if (name[0] == '.') | |
782 | ++name; | |
783 | ||
784 | bzero (sym, sizeof (struct symbol)); | |
785 | ||
786 | /* default assumptions */ | |
787 | SYMBOL_VALUE (sym) = cs->c_value; | |
788 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
789 | ||
790 | if (ISFCN (cs->c_type)) { | |
791 | ||
792 | /* At this point, we don't know the type of the function and assume it | |
793 | is int. This will be patched with the type from its stab entry later | |
794 | on in patch_block_stabs () */ | |
795 | ||
796 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); | |
1ab3bf1b | 797 | SYMBOL_TYPE (sym) = lookup_function_type (lookup_fundamental_type (current_objfile, FT_INTEGER)); |
e38e0312 JG |
798 | |
799 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
800 | SYMBOL_DUP (sym, sym2); | |
801 | ||
802 | if (cs->c_sclass == C_EXT) | |
803 | add_symbol_to_list (sym2, &global_symbols); | |
804 | else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT) | |
805 | add_symbol_to_list (sym2, &file_symbols); | |
806 | } | |
807 | ||
808 | else { | |
809 | ||
810 | /* in case we can't figure out the type, default is `int'. */ | |
1ab3bf1b | 811 | SYMBOL_TYPE (sym) = lookup_fundamental_type (current_objfile, FT_INTEGER); |
e38e0312 JG |
812 | |
813 | switch (cs->c_sclass) | |
814 | { | |
815 | case C_FUN: | |
816 | if (fcn_cs_saved.c_sclass == C_EXT) | |
817 | add_stab_to_list (name, &global_stabs); | |
818 | else | |
819 | add_stab_to_list (name, &file_stabs); | |
820 | break; | |
821 | ||
822 | case C_DECL: /* a type decleration?? */ | |
1ab3bf1b | 823 | qq = (char*) strchr (name, ':'); |
e38e0312 JG |
824 | if (!qq) /* skip if there is no ':' */ |
825 | return NULL; | |
826 | ||
827 | pp = qq + 2; | |
1ab3bf1b | 828 | ttype = SYMBOL_TYPE (sym) = read_type (&pp, objfile); |
e38e0312 JG |
829 | |
830 | /* read_type() will return null if type (or tag) definition was | |
831 | unnnecessarily duplicated. Also, if the symbol doesn't have a name, | |
832 | there is no need to keep it in symbol table. */ | |
833 | ||
834 | if (!ttype || name == qq) | |
835 | return NULL; | |
836 | ||
837 | if (qq[1] == 'T') | |
838 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
839 | else if (qq[1] == 't') | |
840 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
841 | else { | |
842 | printf ("ERROR: Unrecognized stab string.\n"); | |
843 | return NULL; | |
844 | } | |
845 | ||
846 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
1ab3bf1b | 847 | SYMBOL_NAME (sym) = obsavestring (name, qq-name, &objfile->symbol_obstack); |
e38e0312 JG |
848 | |
849 | if (SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE) | |
850 | TYPE_NAME (ttype) = concat ( | |
851 | TYPE_CODE (ttype) == TYPE_CODE_UNION ? "union " : | |
852 | TYPE_CODE (ttype) == TYPE_CODE_STRUCT? "struct " : "enum ", | |
58ae87f6 | 853 | SYMBOL_NAME (sym), NULL); |
e38e0312 JG |
854 | |
855 | else if (!TYPE_NAME (ttype)) /* else, regular typedef. */ | |
856 | TYPE_NAME (ttype) = SYMBOL_NAME (sym); | |
857 | ||
858 | SYMBOL_DUP (sym, sym2); | |
859 | add_symbol_to_list | |
860 | (sym2, within_function ? &local_symbols : &file_symbols); | |
861 | break; | |
862 | ||
863 | case C_GSYM: | |
864 | add_stab_to_list (name, &global_stabs); | |
865 | break; | |
866 | ||
867 | case C_PSYM: | |
1ab3bf1b | 868 | if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL) |
e38e0312 | 869 | return NULL; |
1ab3bf1b | 870 | SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack); |
e38e0312 JG |
871 | SYMBOL_CLASS (sym) = LOC_ARG; |
872 | pp += 2; | |
1ab3bf1b | 873 | SYMBOL_TYPE (sym) = read_type (&pp, objfile); |
e38e0312 JG |
874 | SYMBOL_DUP (sym, sym2); |
875 | add_symbol_to_list (sym2, &local_symbols); | |
876 | break; | |
877 | ||
878 | case C_STSYM: | |
1ab3bf1b | 879 | if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL) |
e38e0312 | 880 | return NULL; |
1ab3bf1b | 881 | SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack); |
e38e0312 JG |
882 | SYMBOL_CLASS (sym) = LOC_STATIC; |
883 | SYMBOL_VALUE (sym) += static_block_base; | |
884 | pp += 2; | |
1ab3bf1b | 885 | SYMBOL_TYPE (sym) = read_type (&pp, objfile); |
e38e0312 JG |
886 | SYMBOL_DUP (sym, sym2); |
887 | add_symbol_to_list | |
888 | (sym2, within_function ? &local_symbols : &file_symbols); | |
889 | break; | |
890 | ||
891 | case C_LSYM: | |
1ab3bf1b | 892 | if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL) |
e38e0312 | 893 | return NULL; |
1ab3bf1b | 894 | SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack); |
e38e0312 JG |
895 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
896 | pp += 1; | |
1ab3bf1b | 897 | SYMBOL_TYPE (sym) = read_type (&pp, objfile); |
e38e0312 JG |
898 | SYMBOL_DUP (sym, sym2); |
899 | add_symbol_to_list (sym2, &local_symbols); | |
900 | break; | |
901 | ||
902 | case C_AUTO: | |
903 | SYMBOL_CLASS (sym) = LOC_LOCAL; | |
904 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); | |
905 | SYMBOL_DUP (sym, sym2); | |
906 | add_symbol_to_list (sym2, &local_symbols); | |
907 | break; | |
908 | ||
909 | case C_EXT: | |
910 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
911 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); | |
912 | SYMBOL_DUP (sym, sym2); | |
913 | add_symbol_to_list (sym2, &global_symbols); | |
914 | break; | |
915 | ||
916 | case C_STAT: | |
917 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
918 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); | |
919 | SYMBOL_DUP (sym, sym2); | |
920 | add_symbol_to_list | |
921 | (sym2, within_function ? &local_symbols : &file_symbols); | |
922 | break; | |
923 | ||
924 | case C_REG: | |
925 | printf ("ERROR! C_REG is not fully implemented!\n"); | |
926 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
927 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); | |
928 | SYMBOL_DUP (sym, sym2); | |
929 | add_symbol_to_list (sym2, &local_symbols); | |
930 | break; | |
931 | ||
932 | case C_RSYM: | |
1ab3bf1b | 933 | pp = (char*) strchr (name, ':'); |
e38e0312 JG |
934 | SYMBOL_CLASS (sym) = LOC_REGISTER; |
935 | SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (cs->c_value); | |
936 | if (pp) { | |
1ab3bf1b | 937 | SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack); |
e38e0312 JG |
938 | pp += 2; |
939 | if (*pp) | |
1ab3bf1b | 940 | SYMBOL_TYPE (sym) = read_type (&pp, objfile); |
e38e0312 JG |
941 | } |
942 | else | |
943 | /* else this is not a stab entry, suppose the type is either | |
944 | `int' or `float', depending on the register class. */ | |
945 | ||
1ab3bf1b JG |
946 | SYMBOL_TYPE (sym) = (SYMBOL_VALUE (sym) < 32) |
947 | ? lookup_fundamental_type (current_objfile, FT_INTEGER) | |
948 | : lookup_fundamental_type (current_objfile, FT_FLOAT); | |
e38e0312 JG |
949 | |
950 | SYMBOL_DUP (sym, sym2); | |
951 | add_symbol_to_list (sym2, &local_symbols); | |
952 | break; | |
953 | ||
954 | default : | |
955 | printf ("ERROR: Unexpected storage class: %d.\n", cs->c_sclass); | |
956 | return NULL; | |
957 | } | |
958 | } | |
959 | return sym2; | |
960 | } | |
961 | ||
962 | ||
963 | static int | |
964 | read_symbol_nvalue (symtable, symno) | |
965 | char *symtable; | |
966 | int symno; | |
967 | { | |
968 | struct internal_syment symbol[1]; | |
969 | ||
970 | bfd_coff_swap_sym_in (symfile_bfd, symtable + (symno*local_symesz), symbol); | |
971 | return symbol->n_value; | |
972 | } | |
973 | ||
974 | ||
975 | static int | |
976 | read_symbol_lineno (symtable, symno) | |
977 | char *symtable; | |
978 | int symno; | |
979 | { | |
980 | struct internal_syment symbol[1]; | |
981 | union internal_auxent main_aux[1]; | |
982 | ||
983 | int ii; | |
984 | ||
985 | for (ii = 0; ii < 50; ii++) { | |
986 | bfd_coff_swap_sym_in (symfile_bfd, | |
987 | symtable + (symno*local_symesz), symbol); | |
988 | if (symbol->n_sclass == C_FCN && 0 == strcmp (symbol->n_name, ".bf")) | |
989 | goto gotit; | |
6b5b330b | 990 | symno += symbol->n_numaux+1; |
e38e0312 JG |
991 | } |
992 | ||
993 | printf ("GDB Error: `.bf' not found.\n"); | |
994 | return 0; | |
995 | ||
996 | gotit: | |
997 | /* take aux entry and return its lineno */ | |
998 | symno++; | |
999 | bfd_coff_swap_aux_in (symfile_bfd, symtable+(symno*local_symesz), | |
1000 | symbol->n_type, symbol->n_sclass, main_aux); | |
1001 | ||
1002 | return main_aux->x_sym.x_misc.x_lnsz.x_lnno; | |
1003 | } | |
1004 | ||
1005 | /* Support for line number handling */ | |
1006 | ||
1007 | /* This function is called for every section; it finds the outer limits | |
1008 | * of the line table (minimum and maximum file offset) so that the | |
1009 | * mainline code can read the whole thing for efficiency. | |
1010 | */ | |
1011 | static void | |
1012 | find_linenos(abfd, asect, vpinfo) | |
1013 | bfd *abfd; | |
1014 | sec_ptr asect; | |
1ab3bf1b | 1015 | PTR vpinfo; |
e38e0312 JG |
1016 | { |
1017 | struct coff_symfile_info *info; | |
1018 | int size, count; | |
1019 | file_ptr offset, maxoff; | |
1020 | ||
1021 | count = asect->lineno_count; | |
1022 | ||
1023 | if (count == 0) | |
1024 | return; | |
1025 | ||
1026 | size = count * coff_data (symfile_bfd)->local_linesz; | |
1027 | info = (struct coff_symfile_info *)vpinfo; | |
1028 | offset = asect->line_filepos; | |
1029 | maxoff = offset + size; | |
1030 | ||
1031 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) | |
1032 | info->min_lineno_offset = offset; | |
1033 | ||
1034 | if (maxoff > info->max_lineno_offset) | |
1035 | info->max_lineno_offset = maxoff; | |
1036 | } | |
1037 | ||
1038 | ||
1039 | /* Read in all the line numbers for fast lookups later. Leave them in | |
1040 | external (unswapped) format in memory; we'll swap them as we enter | |
1041 | them into GDB's data structures. */ | |
1042 | ||
1043 | static int | |
1044 | init_lineno (abfd, offset, size) | |
1045 | bfd *abfd; | |
1046 | long offset; | |
1047 | int size; | |
1048 | { | |
1049 | int val; | |
1050 | ||
1051 | if (bfd_seek(abfd, offset, 0) < 0) | |
1052 | return -1; | |
1053 | ||
1054 | linetab = (char *) xmalloc(size); | |
1055 | ||
1056 | val = bfd_read(linetab, 1, size, abfd); | |
1057 | if (val != size) | |
1058 | return -1; | |
1059 | ||
1060 | linetab_offset = offset; | |
1061 | linetab_size = size; | |
1ab3bf1b | 1062 | make_cleanup (free, linetab); /* Be sure it gets de-allocated. */ |
e38e0312 JG |
1063 | return 0; |
1064 | } | |
93fe4e33 | 1065 | \f |
e38e0312 JG |
1066 | /* dbx allows the text of a symbol name to be continued into the |
1067 | next symbol name! When such a continuation is encountered | |
1068 | (a \ at the end of the text of a name) | |
1069 | call this function to get the continuation. */ | |
1070 | /* So far, I haven't seen this happenning xlc output. I doubt we'll need this | |
1071 | for aixcoff. */ | |
1072 | ||
1d4c28c5 | 1073 | #undef next_symbol_text |
e38e0312 JG |
1074 | #define next_symbol_text() \ |
1075 | printf ("Gdb Error: symbol names on multiple lines not implemented.\n") | |
1076 | ||
1077 | ||
1078 | /* xlc/dbx combination uses a set of builtin types, starting from -1. return | |
1079 | the proper type node fora given builtin type #. */ | |
1080 | ||
1081 | struct type * | |
1082 | builtin_type (pp) | |
1083 | char **pp; | |
1084 | { | |
1085 | int typenums[2]; | |
1086 | ||
1087 | if (**pp != '-') { | |
1088 | printf ("ERROR!, unknown built-in type!\n"); | |
1089 | return NULL; | |
1090 | } | |
1091 | *pp += 1; | |
1092 | read_type_number (pp, typenums); | |
1093 | ||
1094 | /* default types are defined in dbxstclass.h. */ | |
1095 | switch ( typenums[1] ) { | |
1096 | case 1: | |
1ab3bf1b | 1097 | return lookup_fundamental_type (current_objfile, FT_INTEGER); |
e38e0312 | 1098 | case 2: |
1ab3bf1b | 1099 | return lookup_fundamental_type (current_objfile, FT_CHAR); |
e38e0312 | 1100 | case 3: |
1ab3bf1b | 1101 | return lookup_fundamental_type (current_objfile, FT_SHORT); |
e38e0312 | 1102 | case 4: |
1ab3bf1b | 1103 | return lookup_fundamental_type (current_objfile, FT_LONG); |
e38e0312 | 1104 | case 5: |
1ab3bf1b | 1105 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); |
e38e0312 | 1106 | case 6: |
1ab3bf1b | 1107 | return lookup_fundamental_type (current_objfile, FT_SIGNED_CHAR); |
e38e0312 | 1108 | case 7: |
1ab3bf1b | 1109 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); |
e38e0312 | 1110 | case 8: |
1ab3bf1b | 1111 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); |
e38e0312 | 1112 | case 9: |
1ab3bf1b | 1113 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); |
e38e0312 | 1114 | case 10: |
1ab3bf1b | 1115 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG); |
e38e0312 | 1116 | case 11: |
1ab3bf1b | 1117 | return lookup_fundamental_type (current_objfile, FT_VOID); |
e38e0312 | 1118 | case 12: |
1ab3bf1b | 1119 | return lookup_fundamental_type (current_objfile, FT_FLOAT); |
e38e0312 | 1120 | case 13: |
1ab3bf1b | 1121 | return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); |
e38e0312 | 1122 | case 14: |
1ab3bf1b | 1123 | return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); |
e38e0312 | 1124 | case 15: |
1ab3bf1b JG |
1125 | /* requires a builtin `integer' */ |
1126 | return lookup_fundamental_type (current_objfile, FT_INTEGER); | |
e38e0312 | 1127 | case 16: |
1ab3bf1b | 1128 | return lookup_fundamental_type (current_objfile, FT_BOOLEAN); |
e38e0312 | 1129 | case 17: |
1ab3bf1b JG |
1130 | /* requires builtin `short real' */ |
1131 | return lookup_fundamental_type (current_objfile, FT_FLOAT); | |
e38e0312 | 1132 | case 18: |
1ab3bf1b JG |
1133 | /* requires builtin `real' */ |
1134 | return lookup_fundamental_type (current_objfile, FT_FLOAT); | |
e38e0312 JG |
1135 | default : |
1136 | printf ("ERROR! Unknown builtin type -%d\n", typenums[1]); | |
1137 | return NULL; | |
1138 | } | |
1139 | } | |
1140 | ||
1ab3bf1b JG |
1141 | #if 0 /* Seems to be unused, don't bother converting from old misc function |
1142 | vector usage to new minimal symbol tables. FIXME: Delete this? */ | |
1143 | ||
e38e0312 JG |
1144 | /* if we now nothing about a function but its address, make a function symbol |
1145 | out of it with the limited knowladge you have. This will be used when | |
1146 | somebody refers to a function, which doesn't exist in the symbol table, | |
1ab3bf1b | 1147 | but is in the minimal symbol table. */ |
e38e0312 JG |
1148 | |
1149 | struct symbol * | |
1ab3bf1b | 1150 | build_function_symbol (ind, objfile) |
e38e0312 | 1151 | int ind; |
1ab3bf1b | 1152 | struct objfile *objfile; |
e38e0312 JG |
1153 | { |
1154 | struct symbol *sym = | |
1ab3bf1b | 1155 | (struct symbol *) obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); |
e38e0312 JG |
1156 | SYMBOL_NAME (sym) = misc_function_vector[ind].name; |
1157 | /* SYMBOL_VALUE (sym) = misc_function_vector[ind].address; */ | |
1158 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1159 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
1ab3bf1b | 1160 | SYMBOL_TYPE (sym) = lookup_function_type (lookup_fundamental_type (current_objfile, FT_INTEGER)); |
e38e0312 | 1161 | SYMBOL_BLOCK_VALUE (sym) = (struct block *) |
1ab3bf1b | 1162 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct block)); |
e38e0312 JG |
1163 | BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) = misc_function_vector[ind].address; |
1164 | return sym; | |
1165 | } | |
1166 | ||
1ab3bf1b | 1167 | #endif |
e38e0312 | 1168 | |
1ab3bf1b | 1169 | static void |
e38e0312 JG |
1170 | aixcoff_new_init () |
1171 | { | |
1172 | /* Nothin' to do. */ | |
1173 | } | |
1174 | ||
1ab3bf1b | 1175 | static void |
e38e0312 JG |
1176 | aixcoff_symfile_init (sf) |
1177 | struct sym_fns *sf; | |
1178 | { | |
1179 | bfd *abfd = sf->sym_bfd; | |
1180 | ||
1181 | /* Allocate struct to keep track of the symfile */ | |
1182 | /* FIXME memory leak */ | |
1183 | sf->sym_private = xmalloc(sizeof (struct coff_symfile_info)); | |
1184 | ||
1185 | /* | |
1186 | * Save startup file's range of PC addresses to help | |
1187 | * blockframe.c decide where the bottom of the stack is. | |
1188 | */ | |
1189 | if (bfd_get_file_flags(abfd) & EXEC_P) { | |
1190 | entry_point = bfd_get_start_address(abfd); | |
1191 | } else { | |
1192 | entry_point = ~0; | |
1193 | /* set the startup file to be an empty range. */ | |
1194 | startup_file_start = 0; | |
1195 | startup_file_end = 0; | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | ||
1200 | static int | |
1ab3bf1b | 1201 | init_stringtab(abfd, offset, objfile) |
e38e0312 JG |
1202 | bfd *abfd; |
1203 | long offset; | |
1ab3bf1b | 1204 | struct objfile *objfile; |
e38e0312 JG |
1205 | { |
1206 | long length; | |
1207 | int val; | |
1208 | unsigned char lengthbuf[4]; | |
1209 | ||
1210 | if (bfd_seek(abfd, offset, 0) < 0) | |
1211 | return -1; | |
1212 | ||
1213 | val = bfd_read((char *)lengthbuf, 1, sizeof lengthbuf, abfd); | |
1214 | length = bfd_h_get_32(abfd, lengthbuf); | |
1215 | ||
1216 | /* If no string table is needed, then the file may end immediately | |
1217 | after the symbols. Just return with `strtbl' set to null. */ | |
1218 | ||
1219 | if (val != sizeof length || length < sizeof length) | |
1220 | return 0; | |
1221 | ||
1222 | /* Allocate string table from symbol_obstack. We will need this table | |
1223 | as long as we have its symbol table around. */ | |
1224 | ||
1ab3bf1b | 1225 | strtbl = (char*) obstack_alloc (&objfile->symbol_obstack, length); |
e38e0312 JG |
1226 | if (strtbl == NULL) |
1227 | return -1; | |
1228 | ||
1229 | bcopy(&length, strtbl, sizeof length); | |
1230 | if (length == sizeof length) | |
1231 | return 0; | |
1232 | ||
1233 | val = bfd_read(strtbl + sizeof length, 1, length - sizeof length, abfd); | |
1234 | ||
1235 | if (val != length - sizeof length || strtbl[length - 1] != '\0') | |
1236 | return -1; | |
1237 | ||
1238 | return 0; | |
1239 | } | |
1240 | ||
1241 | static int | |
1242 | init_debugsection(abfd) | |
1243 | bfd *abfd; | |
1244 | { | |
1245 | register sec_ptr secp; | |
1246 | bfd_size_type length; | |
1247 | ||
1248 | if (debugsec) { | |
1249 | free(debugsec); | |
1250 | debugsec = NULL; | |
1251 | } | |
1252 | ||
1253 | secp = bfd_get_section_by_name(abfd, ".debug"); | |
1254 | if (!secp) | |
1255 | return 0; | |
1256 | ||
1257 | if (!(length = bfd_section_size(abfd, secp))) | |
1258 | return 0; | |
1259 | ||
1ab3bf1b | 1260 | debugsec = (char *) xmalloc ((unsigned)length); |
e38e0312 JG |
1261 | if (debugsec == NULL) |
1262 | return -1; | |
1263 | ||
1264 | if (!bfd_get_section_contents(abfd, secp, debugsec, (file_ptr) 0, length)) { | |
1265 | printf ("Can't read .debug section from symbol file\n"); | |
1266 | return -1; | |
1267 | } | |
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | static void | |
1272 | free_debugsection() | |
1273 | { | |
1274 | if (debugsec) | |
1275 | free(debugsec); | |
1276 | debugsec = NULL; | |
1277 | } | |
1278 | ||
1279 | ||
1280 | /* aixcoff version of symbol file read. */ | |
1281 | ||
1ab3bf1b | 1282 | static void |
e38e0312 JG |
1283 | aixcoff_symfile_read (sf, addr, mainline) |
1284 | struct sym_fns *sf; | |
1285 | CORE_ADDR addr; | |
1286 | int mainline; | |
1287 | { | |
1288 | int num_symbols; /* # of symbols */ | |
1289 | int symtab_offset; /* symbol table and */ | |
1290 | int stringtab_offset; /* string table file offsets */ | |
1291 | int val; | |
1292 | bfd *abfd; | |
1293 | struct coff_symfile_info *info = (void*) sf->sym_private; | |
1294 | char *name; | |
1295 | ||
1296 | symfile_bfd = abfd = sf->objfile->obfd; | |
1297 | name = sf->objfile->name; | |
1298 | ||
1299 | num_symbols = bfd_get_symcount (abfd); /* # of symbols */ | |
1300 | symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */ | |
1301 | stringtab_offset = symtab_offset + | |
1302 | num_symbols * coff_data(abfd)->local_symesz; | |
1303 | ||
1304 | info->min_lineno_offset = 0; | |
1305 | info->max_lineno_offset = 0; | |
1306 | bfd_map_over_sections (abfd, find_linenos, info); | |
1307 | ||
1308 | /* FIXME! This stuff should move into symfile_init */ | |
1309 | if (info->min_lineno_offset != 0 | |
1310 | && info->max_lineno_offset > info->min_lineno_offset) { | |
1311 | ||
1312 | /* only read in the line # table if one exists */ | |
1313 | val = init_lineno(abfd, info->min_lineno_offset, | |
1314 | info->max_lineno_offset - info->min_lineno_offset); | |
1315 | ||
1316 | if (val < 0) | |
1317 | error("\"%s\": error reading line numbers\n", name); | |
1318 | } | |
1319 | ||
1ab3bf1b | 1320 | val = init_stringtab(abfd, stringtab_offset, sf->objfile); |
e38e0312 JG |
1321 | if (val < 0) { |
1322 | error ("\"%s\": can't get string table", name); | |
1323 | } | |
1324 | ||
1325 | if (init_debugsection(abfd) < 0) { | |
1326 | error ("Error reading .debug section of `%s'\n", name); | |
1327 | } | |
1328 | ||
1329 | /* Position to read the symbol table. Do not read it all at once. */ | |
1330 | val = bfd_seek(abfd, (long)symtab_offset, 0); | |
1331 | if (val < 0) | |
1332 | perror_with_name(name); | |
1333 | ||
1334 | if (bfd_tell(abfd) != symtab_offset) | |
1335 | fatal("bfd? BFD!"); | |
1336 | ||
1ab3bf1b JG |
1337 | init_minimal_symbol_collection (); |
1338 | make_cleanup (discard_minimal_symbols, 0); | |
e38e0312 JG |
1339 | |
1340 | #ifdef XCOFF_INIT_LOADINFO | |
1341 | if (mainline) | |
1342 | XCOFF_INIT_LOADINFO (); | |
1343 | #endif | |
1344 | ||
1345 | /* Now that the executable file is positioned at symbol table, | |
1346 | process it and define symbols accordingly. */ | |
1347 | ||
1348 | read_xcoff_symtab(sf->objfile, num_symbols); | |
1349 | ||
1ab3bf1b | 1350 | make_cleanup (free_debugsection, 0); |
e38e0312 JG |
1351 | |
1352 | /* Sort symbols alphabetically within each block. */ | |
1353 | sort_syms (); | |
1354 | ||
1ab3bf1b JG |
1355 | /* Install any minimal symbols that have been collected as the current |
1356 | minimal symbols for this objfile. */ | |
1357 | ||
021959e2 | 1358 | install_minimal_symbols (sf -> objfile); |
e38e0312 JG |
1359 | |
1360 | /* Make a default for file to list. */ | |
1361 | select_source_symtab (0); | |
1362 | } | |
1363 | ||
1364 | /* Register our ability to parse symbols for aixcoff BFD files. */ | |
1365 | ||
1366 | static struct sym_fns aixcoff_sym_fns = | |
1367 | { | |
1368 | "aixcoff-rs6000", 15, | |
1369 | aixcoff_new_init, aixcoff_symfile_init, | |
1370 | aixcoff_symfile_read, | |
1371 | }; | |
1372 | ||
1373 | void | |
1374 | _initialize_xcoffread () | |
1375 | { | |
1376 | add_symtab_fns(&aixcoff_sym_fns); | |
1377 | } |