| 1 | /* Read AIX xcoff symbol tables and convert to internal format, for GDB. |
| 2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992 |
| 3 | Free Software Foundation, Inc. |
| 4 | Derived from coffread.c, dbxread.c, and a lot of hacking. |
| 5 | Contributed by IBM Corporation. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 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. |
| 13 | |
| 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. |
| 18 | |
| 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "bfd.h" |
| 25 | |
| 26 | #if defined(IBM6000_HOST) && defined(IBM6000_TARGET) |
| 27 | /* Native only: Need struct tbtable in <sys/debug.h> from host, and |
| 28 | need xcoff_add_toc_to_loadinfo in rs6000-tdep.c from target. */ |
| 29 | |
| 30 | /* AIX XCOFF names have a preceeding dot `.' */ |
| 31 | #define NAMES_HAVE_DOT 1 |
| 32 | |
| 33 | #include <sys/types.h> |
| 34 | #include <fcntl.h> |
| 35 | #include <ctype.h> |
| 36 | |
| 37 | #include "obstack.h" |
| 38 | #include <sys/param.h> |
| 39 | #ifndef NO_SYS_FILE |
| 40 | #include <sys/file.h> |
| 41 | #endif |
| 42 | #include <sys/stat.h> |
| 43 | #include <sys/debug.h> |
| 44 | |
| 45 | #include "symtab.h" |
| 46 | #include "gdbtypes.h" |
| 47 | #include "symfile.h" |
| 48 | #include "objfiles.h" |
| 49 | #include "buildsym.h" |
| 50 | #include "stabsread.h" |
| 51 | #include "gdb-stabs.h" |
| 52 | |
| 53 | #include "coff/internal.h" /* FIXME, internal data from BFD */ |
| 54 | #include "libcoff.h" /* FIXME, internal data from BFD */ |
| 55 | #include "coff/rs6000.h" /* FIXME, raw file-format guts of xcoff */ |
| 56 | |
| 57 | |
| 58 | /* Define this if you want gdb use the old xcoff symbol processing. This |
| 59 | way it won't use common `define_symbol()' function and Sun dbx stab |
| 60 | string grammar. And likely it won't be able to do G++ debugging. */ |
| 61 | |
| 62 | /* #define NO_DEFINE_SYMBOL 1 */ |
| 63 | |
| 64 | /* Define this if you want gdb to ignore typdef stabs. This was needed for |
| 65 | one of Transarc, to reduce the size of the symbol table. Types won't be |
| 66 | recognized, but tag names will be. */ |
| 67 | |
| 68 | /* #define NO_TYPEDEFS 1 */ |
| 69 | |
| 70 | /* Simplified internal version of coff symbol table information */ |
| 71 | |
| 72 | struct coff_symbol { |
| 73 | char *c_name; |
| 74 | int c_symnum; /* symbol number of this entry */ |
| 75 | int c_nsyms; /* 0 if syment only, 1 if syment + auxent */ |
| 76 | long c_value; |
| 77 | int c_sclass; |
| 78 | int c_secnum; |
| 79 | unsigned int c_type; |
| 80 | }; |
| 81 | |
| 82 | /* The COFF line table, in raw form. */ |
| 83 | static char *linetab = NULL; /* Its actual contents */ |
| 84 | static long linetab_offset; /* Its offset in the file */ |
| 85 | static unsigned long linetab_size; /* Its size */ |
| 86 | |
| 87 | /* last function's saved coff symbol `cs' */ |
| 88 | |
| 89 | static struct coff_symbol fcn_cs_saved; |
| 90 | |
| 91 | static bfd *symfile_bfd; |
| 92 | |
| 93 | /* Core address of start and end of text of current source file. |
| 94 | This is calculated from the first function seen after a C_FILE |
| 95 | symbol. */ |
| 96 | |
| 97 | |
| 98 | static CORE_ADDR cur_src_end_addr; |
| 99 | |
| 100 | /* Core address of the end of the first object file. */ |
| 101 | |
| 102 | static CORE_ADDR first_object_file_end; |
| 103 | |
| 104 | /* pointer to the string table */ |
| 105 | static char *strtbl; |
| 106 | |
| 107 | /* length of the string table */ |
| 108 | static int strtbl_len; |
| 109 | |
| 110 | /* pointer to debug section */ |
| 111 | static char *debugsec; |
| 112 | |
| 113 | /* pointer to the a.out symbol table */ |
| 114 | static char *symtbl; |
| 115 | |
| 116 | /* initial symbol-table-debug-string vector length */ |
| 117 | |
| 118 | #define INITIAL_STABVECTOR_LENGTH 40 |
| 119 | |
| 120 | /* Nonzero if within a function (so symbols should be local, |
| 121 | if nothing says specifically). */ |
| 122 | |
| 123 | int within_function; |
| 124 | |
| 125 | /* Local variables that hold the shift and mask values for the |
| 126 | COFF file that we are currently reading. These come back to us |
| 127 | from BFD, and are referenced by their macro names, as well as |
| 128 | internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF |
| 129 | macros from ../internalcoff.h . */ |
| 130 | |
| 131 | static unsigned local_n_btshft; |
| 132 | static unsigned local_n_tmask; |
| 133 | |
| 134 | #undef N_BTSHFT |
| 135 | #define N_BTSHFT local_n_btshft |
| 136 | #undef N_TMASK |
| 137 | #define N_TMASK local_n_tmask |
| 138 | |
| 139 | /* Local variables that hold the sizes in the file of various COFF structures. |
| 140 | (We only need to know this to read them from the file -- BFD will then |
| 141 | translate the data in them, into `internal_xxx' structs in the right |
| 142 | byte order, alignment, etc.) */ |
| 143 | |
| 144 | static unsigned local_symesz; |
| 145 | |
| 146 | |
| 147 | /* coff_symfile_init() |
| 148 | is the coff-specific initialization routine for reading symbols. |
| 149 | It is passed a struct sym_fns which contains, among other things, |
| 150 | the BFD for the file whose symbols are being read, and a slot for |
| 151 | a pointer to "private data" which we fill with cookies and other |
| 152 | treats for coff_symfile_read(). |
| 153 | |
| 154 | We will only be called if this is a COFF or COFF-like file. |
| 155 | BFD handles figuring out the format of the file, and code in symtab.c |
| 156 | uses BFD's determination to vector to us. |
| 157 | |
| 158 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ |
| 159 | |
| 160 | struct coff_symfile_info { |
| 161 | file_ptr min_lineno_offset; /* Where in file lowest line#s are */ |
| 162 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ |
| 163 | }; |
| 164 | |
| 165 | |
| 166 | static void |
| 167 | enter_line_range PARAMS ((struct subfile *, unsigned, unsigned, |
| 168 | CORE_ADDR, CORE_ADDR, unsigned *)); |
| 169 | |
| 170 | static void |
| 171 | free_debugsection PARAMS ((void)); |
| 172 | |
| 173 | static int |
| 174 | init_debugsection PARAMS ((bfd *)); |
| 175 | |
| 176 | static int |
| 177 | init_stringtab PARAMS ((bfd *, long, struct objfile *)); |
| 178 | |
| 179 | static void |
| 180 | xcoff_symfile_init PARAMS ((struct objfile *)); |
| 181 | |
| 182 | static void |
| 183 | xcoff_new_init PARAMS ((struct objfile *)); |
| 184 | |
| 185 | #ifdef __STDC__ |
| 186 | struct section_offset; |
| 187 | #endif |
| 188 | |
| 189 | static void |
| 190 | xcoff_symfile_read PARAMS ((struct objfile *, struct section_offset *, int)); |
| 191 | |
| 192 | static void |
| 193 | xcoff_symfile_finish PARAMS ((struct objfile *)); |
| 194 | |
| 195 | static struct section_offsets * |
| 196 | xcoff_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR)); |
| 197 | |
| 198 | static int |
| 199 | init_lineno PARAMS ((bfd *, long, int)); |
| 200 | |
| 201 | static void |
| 202 | find_linenos PARAMS ((bfd *, sec_ptr, PTR)); |
| 203 | |
| 204 | static int |
| 205 | read_symbol_lineno PARAMS ((char *, int)); |
| 206 | |
| 207 | static int |
| 208 | read_symbol_nvalue PARAMS ((char *, int)); |
| 209 | |
| 210 | static struct symbol * |
| 211 | process_xcoff_symbol PARAMS ((struct coff_symbol *, struct objfile *)); |
| 212 | |
| 213 | static void |
| 214 | read_xcoff_symtab PARAMS ((struct objfile *, int)); |
| 215 | |
| 216 | static void |
| 217 | add_stab_to_list PARAMS ((char *, struct pending_stabs **)); |
| 218 | |
| 219 | static void |
| 220 | sort_syms PARAMS ((void)); |
| 221 | |
| 222 | static int |
| 223 | compare_symbols PARAMS ((const void *, const void *)); |
| 224 | |
| 225 | /* Call sort_syms to sort alphabetically |
| 226 | the symbols of each block of each symtab. */ |
| 227 | |
| 228 | static int |
| 229 | compare_symbols (s1p, s2p) |
| 230 | const PTR s1p; |
| 231 | const PTR s2p; |
| 232 | { |
| 233 | /* Names that are less should come first. */ |
| 234 | register struct symbol **s1 = (struct symbol **) s1p; |
| 235 | register struct symbol **s2 = (struct symbol **) s2p; |
| 236 | register int namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2)); |
| 237 | if (namediff != 0) |
| 238 | return namediff; |
| 239 | |
| 240 | /* For symbols of the same name, registers should come first. */ |
| 241 | return ((SYMBOL_CLASS (*s2) == LOC_REGISTER) |
| 242 | - (SYMBOL_CLASS (*s1) == LOC_REGISTER)); |
| 243 | } |
| 244 | |
| 245 | |
| 246 | /* Sort a vector of symbols by their value. */ |
| 247 | |
| 248 | static void |
| 249 | sort_syms () |
| 250 | { |
| 251 | register struct symtab *s; |
| 252 | register struct objfile *objfile; |
| 253 | register int i, nbl; |
| 254 | register struct blockvector *bv; |
| 255 | register struct block *b; |
| 256 | |
| 257 | for (objfile = object_files; objfile != NULL; objfile = objfile -> next) |
| 258 | { |
| 259 | for (s = objfile -> symtabs; s != NULL; s = s -> next) |
| 260 | { |
| 261 | bv = BLOCKVECTOR (s); |
| 262 | nbl = BLOCKVECTOR_NBLOCKS (bv); |
| 263 | for (i = 0; i < nbl; i++) |
| 264 | { |
| 265 | b = BLOCKVECTOR_BLOCK (bv, i); |
| 266 | if (BLOCK_SHOULD_SORT (b)) |
| 267 | { |
| 268 | qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), |
| 269 | sizeof (struct symbol *), compare_symbols); |
| 270 | } |
| 271 | } |
| 272 | } |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | |
| 277 | /* add a given stab string into given stab vector. */ |
| 278 | |
| 279 | static void |
| 280 | add_stab_to_list (stabname, stabvector) |
| 281 | char *stabname; |
| 282 | struct pending_stabs **stabvector; |
| 283 | { |
| 284 | if ( *stabvector == NULL) { |
| 285 | *stabvector = (struct pending_stabs *) |
| 286 | xmalloc (sizeof (struct pending_stabs) + |
| 287 | INITIAL_STABVECTOR_LENGTH * sizeof (char*)); |
| 288 | (*stabvector)->count = 0; |
| 289 | (*stabvector)->length = INITIAL_STABVECTOR_LENGTH; |
| 290 | } |
| 291 | else if ((*stabvector)->count >= (*stabvector)->length) { |
| 292 | (*stabvector)->length += INITIAL_STABVECTOR_LENGTH; |
| 293 | *stabvector = (struct pending_stabs *) |
| 294 | xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) + |
| 295 | (*stabvector)->length * sizeof (char*)); |
| 296 | } |
| 297 | (*stabvector)->stab [(*stabvector)->count++] = stabname; |
| 298 | } |
| 299 | |
| 300 | |
| 301 | #if 0 |
| 302 | /* for all the stabs in a given stab vector, build appropriate types |
| 303 | and fix their symbols in given symbol vector. */ |
| 304 | |
| 305 | void |
| 306 | patch_block_stabs (symbols, stabs) |
| 307 | struct pending *symbols; |
| 308 | struct pending_stabs *stabs; |
| 309 | { |
| 310 | int ii; |
| 311 | |
| 312 | if (!stabs) |
| 313 | return; |
| 314 | |
| 315 | /* for all the stab entries, find their corresponding symbols and |
| 316 | patch their types! */ |
| 317 | |
| 318 | for (ii=0; ii < stabs->count; ++ii) { |
| 319 | char *name = stabs->stab[ii]; |
| 320 | char *pp = (char*) index (name, ':'); |
| 321 | struct symbol *sym = find_symbol_in_list (symbols, name, pp-name); |
| 322 | if (!sym) { |
| 323 | ; |
| 324 | /* printf ("ERROR! stab symbol not found!\n"); */ /* FIXME */ |
| 325 | /* The above is a false alarm. There are cases the we can have |
| 326 | a stab, without its symbol. xlc generates this for the extern |
| 327 | definitions in inner blocks. */ |
| 328 | } |
| 329 | else { |
| 330 | pp += 2; |
| 331 | |
| 332 | if (*(pp-1) == 'F' || *(pp-1) == 'f') |
| 333 | SYMBOL_TYPE (sym) = lookup_function_type (read_type (&pp)); |
| 334 | else |
| 335 | SYMBOL_TYPE (sym) = read_type (&pp, objfile); |
| 336 | } |
| 337 | } |
| 338 | } |
| 339 | #endif |
| 340 | |
| 341 | |
| 342 | /* compare line table entry addresses. */ |
| 343 | |
| 344 | static int |
| 345 | compare_lte (lte1, lte2) |
| 346 | struct linetable_entry *lte1, *lte2; |
| 347 | { |
| 348 | return lte1->pc - lte2->pc; |
| 349 | } |
| 350 | |
| 351 | /* Give a line table with function entries are marked, arrange its functions |
| 352 | in assending order and strip off function entry markers and return it in |
| 353 | a newly created table. If the old one is good enough, return the old one. */ |
| 354 | |
| 355 | static struct linetable * |
| 356 | arrange_linetable (oldLineTb) |
| 357 | struct linetable *oldLineTb; /* old linetable */ |
| 358 | { |
| 359 | int ii, jj, |
| 360 | newline, /* new line count */ |
| 361 | function_count; /* # of functions */ |
| 362 | |
| 363 | struct linetable_entry *fentry; /* function entry vector */ |
| 364 | int fentry_size; /* # of function entries */ |
| 365 | struct linetable *newLineTb; /* new line table */ |
| 366 | |
| 367 | #define NUM_OF_FUNCTIONS 20 |
| 368 | |
| 369 | fentry_size = NUM_OF_FUNCTIONS; |
| 370 | fentry = (struct linetable_entry*) |
| 371 | malloc (fentry_size * sizeof (struct linetable_entry)); |
| 372 | |
| 373 | for (function_count=0, ii=0; ii <oldLineTb->nitems; ++ii) { |
| 374 | |
| 375 | if (oldLineTb->item[ii].line == 0) { /* function entry found. */ |
| 376 | |
| 377 | if (function_count >= fentry_size) { /* make sure you have room. */ |
| 378 | fentry_size *= 2; |
| 379 | fentry = (struct linetable_entry*) |
| 380 | realloc (fentry, fentry_size * sizeof (struct linetable_entry)); |
| 381 | } |
| 382 | fentry[function_count].line = ii; |
| 383 | fentry[function_count].pc = oldLineTb->item[ii].pc; |
| 384 | ++function_count; |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | if (function_count == 0) { |
| 389 | free (fentry); |
| 390 | return oldLineTb; |
| 391 | } |
| 392 | else if (function_count > 1) |
| 393 | qsort (fentry, function_count, sizeof(struct linetable_entry), compare_lte); |
| 394 | |
| 395 | /* allocate a new line table. */ |
| 396 | newLineTb = (struct linetable*) malloc (sizeof (struct linetable) + |
| 397 | (oldLineTb->nitems - function_count) * sizeof (struct linetable_entry)); |
| 398 | |
| 399 | /* if line table does not start with a function beginning, copy up until |
| 400 | a function begin. */ |
| 401 | |
| 402 | newline = 0; |
| 403 | if (oldLineTb->item[0].line != 0) |
| 404 | for (newline=0; |
| 405 | newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline) |
| 406 | newLineTb->item[newline] = oldLineTb->item[newline]; |
| 407 | |
| 408 | /* Now copy function lines one by one. */ |
| 409 | |
| 410 | for (ii=0; ii < function_count; ++ii) { |
| 411 | for (jj = fentry[ii].line + 1; |
| 412 | jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0; |
| 413 | ++jj, ++newline) |
| 414 | newLineTb->item[newline] = oldLineTb->item[jj]; |
| 415 | } |
| 416 | free (fentry); |
| 417 | newLineTb->nitems = oldLineTb->nitems - function_count; |
| 418 | return newLineTb; |
| 419 | } |
| 420 | |
| 421 | |
| 422 | |
| 423 | /* We try to detect the beginning of a compilation unit. That info will |
| 424 | be used as an entry in line number recording routines (enter_line_range) */ |
| 425 | |
| 426 | static unsigned first_fun_line_offset; |
| 427 | static unsigned first_fun_bf; |
| 428 | |
| 429 | #define mark_first_line(OFFSET, SYMNUM) \ |
| 430 | if (!first_fun_line_offset) { \ |
| 431 | first_fun_line_offset = OFFSET; \ |
| 432 | first_fun_bf = SYMNUM; \ |
| 433 | } |
| 434 | |
| 435 | |
| 436 | /* include file support: C_BINCL/C_EINCL pairs will be kept in the |
| 437 | following `IncludeChain'. At the end of each symtab (end_symtab), |
| 438 | we will determine if we should create additional symtab's to |
| 439 | represent if (the include files. */ |
| 440 | |
| 441 | |
| 442 | typedef struct _inclTable { |
| 443 | char *name; /* include filename */ |
| 444 | int begin, end; /* offsets to the line table */ |
| 445 | struct subfile *subfile; |
| 446 | unsigned funStartLine; /* start line # of its function */ |
| 447 | } InclTable; |
| 448 | |
| 449 | #define INITIAL_INCLUDE_TABLE_LENGTH 20 |
| 450 | static InclTable *inclTable; /* global include table */ |
| 451 | static int inclIndx; /* last entry to table */ |
| 452 | static int inclLength; /* table length */ |
| 453 | static int inclDepth; /* nested include depth */ |
| 454 | |
| 455 | |
| 456 | static void |
| 457 | record_include_begin (cs) |
| 458 | struct coff_symbol *cs; |
| 459 | { |
| 460 | /* In xcoff, we assume include files cannot be nested (not in .c files |
| 461 | of course, but in corresponding .s files.) */ |
| 462 | |
| 463 | if (inclDepth) |
| 464 | fatal ("xcoff internal: pending include file exists."); |
| 465 | |
| 466 | ++inclDepth; |
| 467 | |
| 468 | /* allocate an include file, or make room for the new entry */ |
| 469 | if (inclLength == 0) { |
| 470 | inclTable = (InclTable*) |
| 471 | xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); |
| 472 | bzero (inclTable, sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); |
| 473 | inclLength = INITIAL_INCLUDE_TABLE_LENGTH; |
| 474 | inclIndx = 0; |
| 475 | } |
| 476 | else if (inclIndx >= inclLength) { |
| 477 | inclLength += INITIAL_INCLUDE_TABLE_LENGTH; |
| 478 | inclTable = (InclTable*) |
| 479 | xrealloc (inclTable, sizeof (InclTable) * inclLength); |
| 480 | bzero (inclTable+inclLength-INITIAL_INCLUDE_TABLE_LENGTH, |
| 481 | sizeof (InclTable)*INITIAL_INCLUDE_TABLE_LENGTH); |
| 482 | } |
| 483 | |
| 484 | inclTable [inclIndx].name = cs->c_name; |
| 485 | inclTable [inclIndx].begin = cs->c_value; |
| 486 | } |
| 487 | |
| 488 | |
| 489 | static void |
| 490 | record_include_end (cs) |
| 491 | struct coff_symbol *cs; |
| 492 | { |
| 493 | InclTable *pTbl; |
| 494 | |
| 495 | if (inclDepth == 0) |
| 496 | fatal ("xcoff internal: Mismatch C_BINCL/C_EINCL pair found."); |
| 497 | |
| 498 | pTbl = &inclTable [inclIndx]; |
| 499 | pTbl->end = cs->c_value; |
| 500 | |
| 501 | --inclDepth; |
| 502 | ++inclIndx; |
| 503 | } |
| 504 | |
| 505 | |
| 506 | /* given the start and end addresses of a compilation unit (or a csect, at times) |
| 507 | process its lines and create appropriate line vectors. */ |
| 508 | |
| 509 | static void |
| 510 | process_linenos (start, end) |
| 511 | CORE_ADDR start, end; |
| 512 | { |
| 513 | char *pp; |
| 514 | int offset, ii; |
| 515 | |
| 516 | struct subfile main_subfile; /* subfile structure for the main |
| 517 | compilation unit. */ |
| 518 | |
| 519 | /* in the main source file, any time we see a function entry, we reset |
| 520 | this variable to function's absolute starting line number. All the |
| 521 | following line numbers in the function are relative to this, and |
| 522 | we record absolute line numbers in record_line(). */ |
| 523 | |
| 524 | int main_source_baseline = 0; |
| 525 | |
| 526 | |
| 527 | unsigned *firstLine; |
| 528 | CORE_ADDR addr; |
| 529 | |
| 530 | if (!(offset = first_fun_line_offset)) |
| 531 | goto return_after_cleanup; |
| 532 | |
| 533 | bzero (&main_subfile, sizeof (main_subfile)); |
| 534 | first_fun_line_offset = 0; |
| 535 | |
| 536 | if (inclIndx == 0) |
| 537 | /* All source lines were in the main source file. None in include files. */ |
| 538 | |
| 539 | enter_line_range (&main_subfile, offset, 0, start, end, |
| 540 | &main_source_baseline); |
| 541 | |
| 542 | /* else, there was source with line numbers in include files */ |
| 543 | else { |
| 544 | |
| 545 | main_source_baseline = 0; |
| 546 | for (ii=0; ii < inclIndx; ++ii) { |
| 547 | |
| 548 | struct subfile *tmpSubfile; |
| 549 | |
| 550 | /* if there is main file source before include file, enter it. */ |
| 551 | if (offset < inclTable[ii].begin) { |
| 552 | enter_line_range |
| 553 | (&main_subfile, offset, inclTable[ii].begin - LINESZ, start, 0, |
| 554 | &main_source_baseline); |
| 555 | } |
| 556 | |
| 557 | /* Have a new subfile for the include file */ |
| 558 | |
| 559 | tmpSubfile = inclTable[ii].subfile = (struct subfile*) |
| 560 | xmalloc (sizeof (struct subfile)); |
| 561 | |
| 562 | bzero (tmpSubfile, sizeof (struct subfile)); |
| 563 | firstLine = &(inclTable[ii].funStartLine); |
| 564 | |
| 565 | /* enter include file's lines now. */ |
| 566 | enter_line_range (tmpSubfile, inclTable[ii].begin, |
| 567 | inclTable[ii].end, start, 0, firstLine); |
| 568 | |
| 569 | offset = inclTable[ii].end + LINESZ; |
| 570 | } |
| 571 | |
| 572 | /* all the include files' line have been processed at this point. Now, |
| 573 | enter remaining lines of the main file, if any left. */ |
| 574 | if (offset < (linetab_offset + linetab_size + 1 - LINESZ)) { |
| 575 | enter_line_range (&main_subfile, offset, 0, start, end, |
| 576 | &main_source_baseline); |
| 577 | } |
| 578 | } |
| 579 | |
| 580 | /* Process main file's line numbers. */ |
| 581 | if (main_subfile.line_vector) { |
| 582 | struct linetable *lineTb, *lv; |
| 583 | |
| 584 | lv = main_subfile.line_vector; |
| 585 | |
| 586 | /* Line numbers are not necessarily ordered. xlc compilation will |
| 587 | put static function to the end. */ |
| 588 | |
| 589 | lineTb = arrange_linetable (lv); |
| 590 | if (lv == lineTb) { |
| 591 | current_subfile->line_vector = (struct linetable *) |
| 592 | xrealloc (lv, (sizeof (struct linetable) |
| 593 | + lv->nitems * sizeof (struct linetable_entry))); |
| 594 | |
| 595 | } |
| 596 | else { |
| 597 | free (lv); |
| 598 | current_subfile->line_vector = lineTb; |
| 599 | } |
| 600 | |
| 601 | current_subfile->line_vector_length = |
| 602 | current_subfile->line_vector->nitems; |
| 603 | } |
| 604 | |
| 605 | /* Now, process included files' line numbers. */ |
| 606 | |
| 607 | for (ii=0; ii < inclIndx; ++ii) { |
| 608 | |
| 609 | if ( (inclTable[ii].subfile)->line_vector) { /* Useless if!!! FIXMEmgo */ |
| 610 | struct linetable *lineTb, *lv; |
| 611 | |
| 612 | lv = (inclTable[ii].subfile)->line_vector; |
| 613 | |
| 614 | /* Line numbers are not necessarily ordered. xlc compilation will |
| 615 | put static function to the end. */ |
| 616 | |
| 617 | lineTb = arrange_linetable (lv); |
| 618 | |
| 619 | push_subfile (); |
| 620 | |
| 621 | /* For the same include file, we might want to have more than one subfile. |
| 622 | This happens if we have something like: |
| 623 | |
| 624 | ...... |
| 625 | #include "foo.h" |
| 626 | ...... |
| 627 | #include "foo.h" |
| 628 | ...... |
| 629 | |
| 630 | while foo.h including code in it. (stupid but possible) |
| 631 | Since start_subfile() looks at the name and uses an existing one if finds, |
| 632 | we need to provide a fake name and fool it. */ |
| 633 | |
| 634 | /* start_subfile (inclTable[ii].name, (char*)0); */ |
| 635 | start_subfile (" ?", (char*)0); |
| 636 | current_subfile->name = |
| 637 | obsavestring (inclTable[ii].name, strlen (inclTable[ii].name), |
| 638 | ¤t_objfile->symbol_obstack); |
| 639 | |
| 640 | if (lv == lineTb) { |
| 641 | current_subfile->line_vector = (struct linetable *) |
| 642 | xrealloc (lv, (sizeof (struct linetable) |
| 643 | + lv->nitems * sizeof (struct linetable_entry))); |
| 644 | |
| 645 | } |
| 646 | else { |
| 647 | free (lv); |
| 648 | current_subfile->line_vector = lineTb; |
| 649 | } |
| 650 | |
| 651 | current_subfile->line_vector_length = |
| 652 | current_subfile->line_vector->nitems; |
| 653 | start_subfile (pop_subfile (), (char*)0); |
| 654 | } |
| 655 | } |
| 656 | |
| 657 | return_after_cleanup: |
| 658 | |
| 659 | /* We don't want to keep alloc/free'ing the global include file table. */ |
| 660 | inclIndx = 0; |
| 661 | |
| 662 | /* start with a fresh subfile structure for the next file. */ |
| 663 | bzero (&main_subfile, sizeof (struct subfile)); |
| 664 | } |
| 665 | |
| 666 | void |
| 667 | aix_process_linenos () |
| 668 | { |
| 669 | /* process line numbers and enter them into line vector */ |
| 670 | process_linenos (last_source_start_addr, cur_src_end_addr); |
| 671 | } |
| 672 | |
| 673 | |
| 674 | /* Enter a given range of lines into the line vector. |
| 675 | can be called in the following two ways: |
| 676 | enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or |
| 677 | enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine) */ |
| 678 | |
| 679 | static void |
| 680 | enter_line_range (subfile, beginoffset, endoffset, startaddr, endaddr, firstLine) |
| 681 | struct subfile *subfile; |
| 682 | unsigned beginoffset, endoffset; /* offsets to line table */ |
| 683 | CORE_ADDR startaddr, endaddr; |
| 684 | unsigned *firstLine; |
| 685 | { |
| 686 | char *pp, *limit; |
| 687 | CORE_ADDR addr; |
| 688 | |
| 689 | /* Do Byte swapping, if needed. FIXME! */ |
| 690 | #define P_LINENO(PP) (*(unsigned short*)((struct external_lineno*)(PP))->l_lnno) |
| 691 | #define P_LINEADDR(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_paddr) |
| 692 | #define P_LINESYM(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_symndx) |
| 693 | |
| 694 | pp = &linetab [beginoffset - linetab_offset]; |
| 695 | limit = endoffset ? &linetab [endoffset - linetab_offset] |
| 696 | : &linetab [linetab_size -1]; |
| 697 | |
| 698 | while (pp <= limit) { |
| 699 | |
| 700 | /* find the address this line represents */ |
| 701 | addr = P_LINENO(pp) ? |
| 702 | P_LINEADDR(pp) : read_symbol_nvalue (symtbl, P_LINESYM(pp)); |
| 703 | |
| 704 | if (addr < startaddr || (endaddr && addr > endaddr)) |
| 705 | return; |
| 706 | |
| 707 | if (P_LINENO(pp) == 0) { |
| 708 | *firstLine = read_symbol_lineno (symtbl, P_LINESYM(pp)); |
| 709 | record_line (subfile, 0, addr); |
| 710 | --(*firstLine); |
| 711 | } |
| 712 | else |
| 713 | record_line (subfile, *firstLine + P_LINENO(pp), addr); |
| 714 | |
| 715 | pp += LINESZ; |
| 716 | } |
| 717 | } |
| 718 | |
| 719 | typedef struct { |
| 720 | int fsize; /* file size */ |
| 721 | int fixedparms; /* number of fixed parms */ |
| 722 | int floatparms; /* number of float parms */ |
| 723 | unsigned int parminfo; /* parameter info. |
| 724 | See /usr/include/sys/debug.h |
| 725 | tbtable_ext.parminfo */ |
| 726 | int framesize; /* function frame size */ |
| 727 | } TracebackInfo; |
| 728 | |
| 729 | |
| 730 | /* Given a function symbol, return its traceback information. */ |
| 731 | |
| 732 | TracebackInfo * |
| 733 | retrieve_tracebackinfo (abfd, textsec, cs) |
| 734 | bfd *abfd; |
| 735 | sec_ptr textsec; |
| 736 | struct coff_symbol *cs; |
| 737 | { |
| 738 | #define TBTABLE_BUFSIZ 2000 |
| 739 | #define MIN_TBTABSIZ 50 /* minimum buffer size to hold a |
| 740 | traceback table. */ |
| 741 | |
| 742 | static TracebackInfo tbInfo; |
| 743 | struct tbtable *ptb; |
| 744 | |
| 745 | static char buffer [TBTABLE_BUFSIZ]; |
| 746 | |
| 747 | int *pinsn; |
| 748 | int bytesread=0; /* total # of bytes read so far */ |
| 749 | int bufferbytes; /* number of bytes in the buffer */ |
| 750 | |
| 751 | int functionstart = cs->c_value - textsec->vma; |
| 752 | |
| 753 | bzero (&tbInfo, sizeof (tbInfo)); |
| 754 | |
| 755 | /* keep reading blocks of data from the text section, until finding a zero |
| 756 | word and a traceback table. */ |
| 757 | |
| 758 | while ( |
| 759 | bufferbytes = ( |
| 760 | (TBTABLE_BUFSIZ < (textsec->_raw_size - functionstart - bytesread)) ? |
| 761 | TBTABLE_BUFSIZ : (textsec->_raw_size - functionstart - bytesread)) |
| 762 | |
| 763 | && bfd_get_section_contents (abfd, textsec, buffer, |
| 764 | (file_ptr)(functionstart + bytesread), bufferbytes)) |
| 765 | { |
| 766 | bytesread += bufferbytes; |
| 767 | pinsn = (int*) buffer; |
| 768 | |
| 769 | /* if this is the first time we filled the buffer, retrieve function |
| 770 | framesize info. */ |
| 771 | |
| 772 | if (bytesread == bufferbytes) { |
| 773 | |
| 774 | /* skip over unrelated instructions */ |
| 775 | |
| 776 | if (*pinsn == 0x7c0802a6) /* mflr r0 */ |
| 777 | ++pinsn; |
| 778 | if ((*pinsn & 0xfc00003e) == 0x7c000026) /* mfcr Rx */ |
| 779 | ++pinsn; |
| 780 | if ((*pinsn & 0xfc000000) == 0x48000000) /* bl foo, save fprs */ |
| 781 | ++pinsn; |
| 782 | if ((*pinsn & 0xfc1f0000) == 0xbc010000) /* stm Rx, NUM(r1) */ |
| 783 | ++pinsn; |
| 784 | |
| 785 | do { |
| 786 | int tmp = (*pinsn >> 16) & 0xffff; |
| 787 | |
| 788 | if (tmp == 0x9421) { /* stu r1, NUM(r1) */ |
| 789 | tbInfo.framesize = 0x10000 - (*pinsn & 0xffff); |
| 790 | break; |
| 791 | } |
| 792 | else if ((*pinsn == 0x93e1fffc) || /* st r31,-4(r1) */ |
| 793 | (tmp == 0x9001)) /* st r0, NUM(r1) */ |
| 794 | ; |
| 795 | /* else, could not find a frame size. */ |
| 796 | else |
| 797 | return NULL; |
| 798 | |
| 799 | } while (++pinsn && *pinsn); |
| 800 | |
| 801 | if (!tbInfo.framesize) |
| 802 | return NULL; |
| 803 | } |
| 804 | |
| 805 | /* look for a zero word. */ |
| 806 | |
| 807 | while (*pinsn && (pinsn < (int*)(buffer + bufferbytes - sizeof(int)))) |
| 808 | ++pinsn; |
| 809 | |
| 810 | if (pinsn >= (int*)(buffer + bufferbytes)) |
| 811 | continue; |
| 812 | |
| 813 | if (*pinsn == 0) { |
| 814 | |
| 815 | /* function size is the amount of bytes we have skipped so far. */ |
| 816 | tbInfo.fsize = bytesread - (buffer + bufferbytes - (char*)pinsn); |
| 817 | |
| 818 | ++pinsn; |
| 819 | |
| 820 | /* if we don't have the whole traceback table in the buffer, re-read |
| 821 | the whole thing. */ |
| 822 | |
| 823 | if ((char*)pinsn > (buffer + bufferbytes - MIN_TBTABSIZ)) { |
| 824 | |
| 825 | /* In case if we are *very* close to the end of the text section |
| 826 | and cannot read properly from that point on, abort by returning |
| 827 | NULL. |
| 828 | Handle this case more graciously -- FIXME */ |
| 829 | |
| 830 | if (!bfd_get_section_contents ( |
| 831 | abfd, textsec, buffer, |
| 832 | (file_ptr)(functionstart + |
| 833 | bytesread - (buffer + bufferbytes - (char*)pinsn)),MIN_TBTABSIZ)) |
| 834 | { printf ("Abnormal return!..\n"); return NULL; } |
| 835 | |
| 836 | ptb = (struct tbtable *)buffer; |
| 837 | } |
| 838 | else |
| 839 | ptb = (struct tbtable *)pinsn; |
| 840 | |
| 841 | tbInfo.fixedparms = ptb->tb.fixedparms; |
| 842 | tbInfo.floatparms = ptb->tb.floatparms; |
| 843 | tbInfo.parminfo = ptb->tb_ext.parminfo; |
| 844 | return &tbInfo; |
| 845 | } |
| 846 | } |
| 847 | return NULL; |
| 848 | } |
| 849 | |
| 850 | #if 0 |
| 851 | /* Given a function symbol, return a pointer to its traceback table. */ |
| 852 | |
| 853 | struct tbtable * |
| 854 | retrieve_traceback (abfd, textsec, cs, size) |
| 855 | bfd *abfd; |
| 856 | sec_ptr textsec; |
| 857 | struct coff_symbol *cs; |
| 858 | int *size; /* return function size */ |
| 859 | { |
| 860 | #define TBTABLE_BUFSIZ 2000 |
| 861 | #define MIN_TBTABSIZ 50 /* minimum buffer size to hold a |
| 862 | traceback table. */ |
| 863 | |
| 864 | static char buffer [TBTABLE_BUFSIZ]; |
| 865 | |
| 866 | int *pinsn; |
| 867 | int bytesread=0; /* total # of bytes read so far */ |
| 868 | int bufferbytes; /* number of bytes in the buffer */ |
| 869 | |
| 870 | int functionstart = cs->c_value - textsec->filepos + textsec->vma; |
| 871 | *size = 0; |
| 872 | |
| 873 | /* keep reading blocks of data from the text section, until finding a zero |
| 874 | word and a traceback table. */ |
| 875 | |
| 876 | while (bfd_get_section_contents (abfd, textsec, buffer, |
| 877 | (file_ptr)(functionstart + bytesread), |
| 878 | bufferbytes = ( |
| 879 | (TBTABLE_BUFSIZ < (textsec->size - functionstart - bytesread)) ? |
| 880 | TBTABLE_BUFSIZ : (textsec->size - functionstart - bytesread)))) |
| 881 | { |
| 882 | bytesread += bufferbytes; |
| 883 | pinsn = (int*) buffer; |
| 884 | |
| 885 | /* look for a zero word. */ |
| 886 | |
| 887 | while (*pinsn && (pinsn < (int*)(buffer + bufferbytes - sizeof(int)))) |
| 888 | ++pinsn; |
| 889 | |
| 890 | if (pinsn >= (int*)(buffer + bufferbytes)) |
| 891 | continue; |
| 892 | |
| 893 | if (*pinsn == 0) { |
| 894 | |
| 895 | /* function size is the amount of bytes we have skipped so far. */ |
| 896 | *size = bytesread - (buffer + bufferbytes - pinsn); |
| 897 | |
| 898 | ++pinsn; |
| 899 | |
| 900 | /* if we don't have the whole traceback table in the buffer, re-read |
| 901 | the whole thing. */ |
| 902 | |
| 903 | if ((char*)pinsn > (buffer + bufferbytes - MIN_TBTABSIZ)) { |
| 904 | |
| 905 | /* In case if we are *very* close to the end of the text section |
| 906 | and cannot read properly from that point on, abort for now. |
| 907 | Handle this case more graciously -- FIXME */ |
| 908 | |
| 909 | if (!bfd_get_section_contents ( |
| 910 | abfd, textsec, buffer, |
| 911 | (file_ptr)(functionstart + |
| 912 | bytesread - (buffer + bufferbytes - pinsn)),MIN_TBTABSIZ)) |
| 913 | /* abort (); */ { printf ("abort!!!\n"); return NULL; } |
| 914 | |
| 915 | return (struct tbtable *)buffer; |
| 916 | } |
| 917 | else |
| 918 | return (struct tbtable *)pinsn; |
| 919 | } |
| 920 | } |
| 921 | return NULL; |
| 922 | } |
| 923 | #endif /* 0 */ |
| 924 | |
| 925 | |
| 926 | |
| 927 | |
| 928 | /* Save the vital information for use when closing off the current file. |
| 929 | NAME is the file name the symbols came from, START_ADDR is the first |
| 930 | text address for the file, and SIZE is the number of bytes of text. */ |
| 931 | |
| 932 | #define complete_symtab(name, start_addr) { \ |
| 933 | last_source_file = savestring (name, strlen (name)); \ |
| 934 | last_source_start_addr = start_addr; \ |
| 935 | } |
| 936 | |
| 937 | |
| 938 | /* Refill the symbol table input buffer |
| 939 | and set the variables that control fetching entries from it. |
| 940 | Reports an error if no data available. |
| 941 | This function can read past the end of the symbol table |
| 942 | (into the string table) but this does no harm. */ |
| 943 | |
| 944 | /* Reading symbol table has to be fast! Keep the followings as macros, rather |
| 945 | than functions. */ |
| 946 | |
| 947 | #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, ALLOCED) \ |
| 948 | { \ |
| 949 | char *namestr; \ |
| 950 | if (ALLOCED) \ |
| 951 | namestr = (NAME) + 1; \ |
| 952 | else { \ |
| 953 | (NAME) = namestr = \ |
| 954 | obstack_copy0 (&objfile->symbol_obstack, (NAME) + 1, strlen ((NAME)+1)); \ |
| 955 | (ALLOCED) = 1; \ |
| 956 | } \ |
| 957 | prim_record_minimal_symbol (namestr, (ADDR), (TYPE)); \ |
| 958 | misc_func_recorded = 1; \ |
| 959 | } |
| 960 | |
| 961 | |
| 962 | /* A parameter template, used by ADD_PARM_TO_PENDING. */ |
| 963 | |
| 964 | static struct symbol parmsym = { /* default parameter symbol */ |
| 965 | "", /* name */ |
| 966 | VAR_NAMESPACE, /* namespace */ |
| 967 | LOC_ARG, /* class */ |
| 968 | NULL, /* type */ |
| 969 | 0, /* line number */ |
| 970 | 0, /* value */ |
| 971 | }; |
| 972 | |
| 973 | /* Add a parameter to a given pending symbol list. */ |
| 974 | |
| 975 | #define ADD_PARM_TO_PENDING(PARM, VALUE, PTYPE, PENDING_SYMBOLS) \ |
| 976 | { \ |
| 977 | PARM = (struct symbol *) \ |
| 978 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \ |
| 979 | *(PARM) = parmsym; \ |
| 980 | SYMBOL_TYPE (PARM) = PTYPE; \ |
| 981 | SYMBOL_VALUE (PARM) = VALUE; \ |
| 982 | add_symbol_to_list (PARM, &PENDING_SYMBOLS); \ |
| 983 | } |
| 984 | |
| 985 | |
| 986 | /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be |
| 987 | nested. At any given time, a symbol can only be in one static block. |
| 988 | This is the base address of current static block, zero if non exists. */ |
| 989 | |
| 990 | static int static_block_base = 0; |
| 991 | |
| 992 | /* true if space for symbol name has been allocated. */ |
| 993 | |
| 994 | static int symname_alloced = 0; |
| 995 | |
| 996 | /* read the whole symbol table of a given bfd. */ |
| 997 | |
| 998 | static void |
| 999 | read_xcoff_symtab (objfile, nsyms) |
| 1000 | struct objfile *objfile; /* Object file we're reading from */ |
| 1001 | int nsyms; /* # of symbols */ |
| 1002 | { |
| 1003 | bfd *abfd = objfile->obfd; |
| 1004 | char *raw_symbol; /* Pointer into raw seething symbol table */ |
| 1005 | char *raw_auxptr; /* Pointer to first raw aux entry for sym */ |
| 1006 | sec_ptr textsec; /* Pointer to text section */ |
| 1007 | TracebackInfo *ptb; /* Pointer to traceback table */ |
| 1008 | |
| 1009 | struct internal_syment symbol[1]; |
| 1010 | union internal_auxent main_aux[1]; |
| 1011 | struct coff_symbol cs[1]; |
| 1012 | CORE_ADDR file_start_addr = 0; |
| 1013 | CORE_ADDR file_end_addr = 0; |
| 1014 | |
| 1015 | int next_file_symnum = -1; |
| 1016 | int just_started = 1; |
| 1017 | int depth = 0; |
| 1018 | int toc_offset = 0; /* toc offset value in data section. */ |
| 1019 | int val; |
| 1020 | int fcn_last_line; |
| 1021 | int fcn_start_addr; |
| 1022 | long fcn_line_offset; |
| 1023 | size_t size; |
| 1024 | |
| 1025 | struct coff_symbol fcn_stab_saved; |
| 1026 | |
| 1027 | /* fcn_cs_saved is global because process_xcoff_symbol needs it. */ |
| 1028 | union internal_auxent fcn_aux_saved; |
| 1029 | struct type *fcn_type_saved = NULL; |
| 1030 | struct context_stack *new; |
| 1031 | |
| 1032 | char *filestring = " _start_ "; /* Name of the current file. */ |
| 1033 | |
| 1034 | char *last_csect_name; /* last seen csect's name and value */ |
| 1035 | CORE_ADDR last_csect_val; |
| 1036 | int misc_func_recorded; /* true if any misc. function */ |
| 1037 | |
| 1038 | current_objfile = objfile; |
| 1039 | |
| 1040 | /* Get the appropriate COFF "constants" related to the file we're handling. */ |
| 1041 | N_TMASK = coff_data (abfd)->local_n_tmask; |
| 1042 | N_BTSHFT = coff_data (abfd)->local_n_btshft; |
| 1043 | local_symesz = coff_data (abfd)->local_symesz; |
| 1044 | |
| 1045 | last_source_file = NULL; |
| 1046 | last_csect_name = 0; |
| 1047 | last_csect_val = 0; |
| 1048 | misc_func_recorded = 0; |
| 1049 | |
| 1050 | start_stabs (); |
| 1051 | start_symtab (filestring, (char *)NULL, file_start_addr); |
| 1052 | symnum = 0; |
| 1053 | first_object_file_end = 0; |
| 1054 | |
| 1055 | /* Allocate space for the entire symbol table at once, and read it |
| 1056 | all in. The bfd is already positioned at the beginning of |
| 1057 | the symbol table. */ |
| 1058 | |
| 1059 | size = coff_data (abfd)->local_symesz * nsyms; |
| 1060 | symtbl = xmalloc (size); |
| 1061 | |
| 1062 | val = bfd_read (symtbl, size, 1, abfd); |
| 1063 | if (val != size) |
| 1064 | perror_with_name ("reading symbol table"); |
| 1065 | |
| 1066 | raw_symbol = symtbl; |
| 1067 | |
| 1068 | textsec = bfd_get_section_by_name (abfd, ".text"); |
| 1069 | if (!textsec) { |
| 1070 | printf ("Unable to locate text section!\n"); |
| 1071 | } |
| 1072 | |
| 1073 | while (symnum < nsyms) { |
| 1074 | |
| 1075 | QUIT; /* make this command interruptable. */ |
| 1076 | |
| 1077 | /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */ |
| 1078 | /* read one symbol into `cs' structure. After processing the whole symbol |
| 1079 | table, only string table will be kept in memory, symbol table and debug |
| 1080 | section of xcoff will be freed. Thus we can mark symbols with names |
| 1081 | in string table as `alloced'. */ |
| 1082 | { |
| 1083 | int ii; |
| 1084 | |
| 1085 | /* Swap and align the symbol into a reasonable C structure. */ |
| 1086 | bfd_coff_swap_sym_in (abfd, raw_symbol, symbol); |
| 1087 | |
| 1088 | cs->c_symnum = symnum; |
| 1089 | cs->c_nsyms = symbol->n_numaux; |
| 1090 | if (symbol->n_zeroes) { |
| 1091 | symname_alloced = 0; |
| 1092 | /* We must use the original, unswapped, name here so the name field |
| 1093 | pointed to by cs->c_name will persist throughout xcoffread. If |
| 1094 | we use the new field, it gets overwritten for each symbol. */ |
| 1095 | cs->c_name = ((struct external_syment *)raw_symbol)->e.e_name; |
| 1096 | } else if (symbol->n_sclass & 0x80) { |
| 1097 | cs->c_name = debugsec + symbol->n_offset; |
| 1098 | symname_alloced = 0; |
| 1099 | } else { /* in string table */ |
| 1100 | cs->c_name = strtbl + (int)symbol->n_offset; |
| 1101 | symname_alloced = 1; |
| 1102 | } |
| 1103 | cs->c_value = symbol->n_value; |
| 1104 | /* n_sclass is signed (FIXME), so we had better not mask off any |
| 1105 | high bits it contains, since the values we will be comparing |
| 1106 | it to are also signed (FIXME). Defined in <coff/internal.h>. |
| 1107 | At this point (3Jun92, gnu@cygnus.com) I think the fix is to |
| 1108 | make the fields and values unsigned chars, but changing the next |
| 1109 | line is a simple patch late in the release cycle, for now. */ |
| 1110 | cs->c_sclass = symbol->n_sclass /* & 0xff */; |
| 1111 | cs->c_secnum = symbol->n_scnum; |
| 1112 | cs->c_type = (unsigned)symbol->n_type; |
| 1113 | |
| 1114 | raw_symbol += coff_data (abfd)->local_symesz; |
| 1115 | ++symnum; |
| 1116 | |
| 1117 | raw_auxptr = raw_symbol; /* Save addr of first aux entry */ |
| 1118 | |
| 1119 | /* Skip all the auxents associated with this symbol. */ |
| 1120 | for (ii = symbol->n_numaux; ii; --ii ) { |
| 1121 | raw_symbol += coff_data (abfd)->local_auxesz; |
| 1122 | ++symnum; |
| 1123 | } |
| 1124 | } |
| 1125 | |
| 1126 | /* if symbol name starts with ".$" or "$", ignore it. */ |
| 1127 | if (cs->c_name[0] == '$' || (cs->c_name[1] == '$' && cs->c_name[0] == '.')) |
| 1128 | continue; |
| 1129 | |
| 1130 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) { |
| 1131 | if (last_source_file) |
| 1132 | { |
| 1133 | end_symtab (cur_src_end_addr, 1, 0, objfile); |
| 1134 | end_stabs (); |
| 1135 | } |
| 1136 | |
| 1137 | start_stabs (); |
| 1138 | start_symtab ("_globals_", (char *)NULL, (CORE_ADDR)0); |
| 1139 | cur_src_end_addr = first_object_file_end; |
| 1140 | /* done with all files, everything from here on is globals */ |
| 1141 | } |
| 1142 | |
| 1143 | /* if explicitly specified as a function, treat is as one. */ |
| 1144 | if (ISFCN(cs->c_type) && cs->c_sclass != C_TPDEF) { |
| 1145 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1146 | main_aux); |
| 1147 | goto function_entry_point; |
| 1148 | } |
| 1149 | |
| 1150 | if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT) && cs->c_nsyms == 1) |
| 1151 | { |
| 1152 | /* dealing with a symbol with a csect entry. */ |
| 1153 | |
| 1154 | # define CSECT(PP) ((PP)->x_csect) |
| 1155 | # define CSECT_LEN(PP) (CSECT(PP).x_scnlen) |
| 1156 | # define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp)) |
| 1157 | # define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp)) |
| 1158 | # define CSECT_SCLAS(PP) (CSECT(PP).x_smclas) |
| 1159 | |
| 1160 | /* Convert the auxent to something we can access. */ |
| 1161 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1162 | main_aux); |
| 1163 | |
| 1164 | switch (CSECT_SMTYP (main_aux)) { |
| 1165 | |
| 1166 | case XTY_ER : |
| 1167 | continue; /* ignore all external references. */ |
| 1168 | |
| 1169 | case XTY_SD : /* a section description. */ |
| 1170 | { |
| 1171 | switch (CSECT_SCLAS (main_aux)) { |
| 1172 | |
| 1173 | case XMC_PR : /* a `.text' csect. */ |
| 1174 | { |
| 1175 | |
| 1176 | /* A program csect is seen. |
| 1177 | |
| 1178 | We have to allocate one symbol table for each program csect. Normally |
| 1179 | gdb prefers one symtab for each compilation unit (CU). In case of AIX, one |
| 1180 | CU might include more than one prog csect, and they don't have to be |
| 1181 | adjacent in terms of the space they occupy in memory. Thus, one single |
| 1182 | CU might get fragmented in the memory and gdb's file start and end address |
| 1183 | approach does not work! */ |
| 1184 | |
| 1185 | if (last_csect_name) { |
| 1186 | |
| 1187 | /* if no misc. function recorded in the last seen csect, enter |
| 1188 | it as a function. This will take care of functions like |
| 1189 | strcmp() compiled by xlc. */ |
| 1190 | |
| 1191 | if (!misc_func_recorded) { |
| 1192 | int alloced = 0; |
| 1193 | RECORD_MINIMAL_SYMBOL (last_csect_name, last_csect_val, |
| 1194 | mst_text, alloced); |
| 1195 | } |
| 1196 | |
| 1197 | |
| 1198 | complete_symtab (filestring, file_start_addr); |
| 1199 | cur_src_end_addr = file_end_addr; |
| 1200 | end_symtab (file_end_addr, 1, 0, objfile); |
| 1201 | end_stabs (); |
| 1202 | start_stabs (); |
| 1203 | start_symtab ((char *)NULL, (char *)NULL, (CORE_ADDR)0); |
| 1204 | } |
| 1205 | |
| 1206 | /* If this is the very first csect seen, basically `__start'. */ |
| 1207 | if (just_started) { |
| 1208 | first_object_file_end = cs->c_value + CSECT_LEN (main_aux); |
| 1209 | just_started = 0; |
| 1210 | } |
| 1211 | |
| 1212 | file_start_addr = cs->c_value; |
| 1213 | file_end_addr = cs->c_value + CSECT_LEN (main_aux); |
| 1214 | |
| 1215 | if (cs->c_name && cs->c_name[0] == '.') { |
| 1216 | last_csect_name = cs->c_name; |
| 1217 | last_csect_val = cs->c_value; |
| 1218 | } |
| 1219 | } |
| 1220 | misc_func_recorded = 0; |
| 1221 | continue; |
| 1222 | |
| 1223 | case XMC_RW : |
| 1224 | break; |
| 1225 | |
| 1226 | /* If the section is not a data description, ignore it. Note that |
| 1227 | uninitialized data will show up as XTY_CM/XMC_RW pair. */ |
| 1228 | |
| 1229 | case XMC_TC0: |
| 1230 | if (toc_offset) |
| 1231 | warning ("More than one xmc_tc0 symbol found."); |
| 1232 | toc_offset = cs->c_value; |
| 1233 | continue; |
| 1234 | |
| 1235 | case XMC_TC : /* ignore toc entries */ |
| 1236 | default : /* any other XMC_XXX */ |
| 1237 | continue; |
| 1238 | } |
| 1239 | } |
| 1240 | break; /* switch CSECT_SCLAS() */ |
| 1241 | |
| 1242 | case XTY_LD : |
| 1243 | |
| 1244 | /* a function entry point. */ |
| 1245 | if (CSECT_SCLAS (main_aux) == XMC_PR) { |
| 1246 | |
| 1247 | function_entry_point: |
| 1248 | RECORD_MINIMAL_SYMBOL (cs->c_name, cs->c_value, mst_text, |
| 1249 | symname_alloced); |
| 1250 | |
| 1251 | fcn_line_offset = main_aux->x_sym.x_fcnary.x_fcn.x_lnnoptr; |
| 1252 | fcn_start_addr = cs->c_value; |
| 1253 | |
| 1254 | /* save the function header info, which will be used |
| 1255 | when `.bf' is seen. */ |
| 1256 | fcn_cs_saved = *cs; |
| 1257 | fcn_aux_saved = *main_aux; |
| 1258 | |
| 1259 | |
| 1260 | ptb = NULL; |
| 1261 | |
| 1262 | /* If function has two auxent, then debugging information is |
| 1263 | already available for it. Process traceback table for |
| 1264 | functions with only one auxent. */ |
| 1265 | |
| 1266 | if (cs->c_nsyms == 1) |
| 1267 | ptb = retrieve_tracebackinfo (abfd, textsec, cs); |
| 1268 | |
| 1269 | else if (cs->c_nsyms != 2) |
| 1270 | abort (); |
| 1271 | |
| 1272 | /* If there is traceback info, create and add parameters for it. */ |
| 1273 | |
| 1274 | if (ptb && (ptb->fixedparms || ptb->floatparms)) { |
| 1275 | |
| 1276 | int parmcnt = ptb->fixedparms + ptb->floatparms; |
| 1277 | char *parmcode = (char*) &ptb->parminfo; |
| 1278 | int parmvalue = ptb->framesize + 0x18; /* sizeof(LINK AREA) == 0x18 */ |
| 1279 | unsigned int ii, mask; |
| 1280 | |
| 1281 | for (ii=0, mask = 0x80000000; ii <parmcnt; ++ii) { |
| 1282 | struct symbol *parm; |
| 1283 | |
| 1284 | if (ptb->parminfo & mask) { /* float or double */ |
| 1285 | mask = mask >> 1; |
| 1286 | if (ptb->parminfo & mask) { /* double parm */ |
| 1287 | ADD_PARM_TO_PENDING |
| 1288 | (parm, parmvalue, builtin_type_double, local_symbols); |
| 1289 | parmvalue += sizeof (double); |
| 1290 | } |
| 1291 | else { /* float parm */ |
| 1292 | ADD_PARM_TO_PENDING |
| 1293 | (parm, parmvalue, builtin_type_float, local_symbols); |
| 1294 | parmvalue += sizeof (float); |
| 1295 | } |
| 1296 | } |
| 1297 | else { /* fixed parm, use (int*) for hex rep. */ |
| 1298 | ADD_PARM_TO_PENDING (parm, parmvalue, |
| 1299 | lookup_pointer_type (builtin_type_int), |
| 1300 | local_symbols); |
| 1301 | parmvalue += sizeof (int); |
| 1302 | } |
| 1303 | mask = mask >> 1; |
| 1304 | } |
| 1305 | |
| 1306 | /* Fake this as a function. Needed in process_xcoff_symbol() */ |
| 1307 | cs->c_type = 32; |
| 1308 | |
| 1309 | finish_block(process_xcoff_symbol (cs, objfile), &local_symbols, |
| 1310 | pending_blocks, cs->c_value, |
| 1311 | cs->c_value + ptb->fsize, objfile); |
| 1312 | } |
| 1313 | continue; |
| 1314 | } |
| 1315 | /* shared library function trampoline code entry point. */ |
| 1316 | else if (CSECT_SCLAS (main_aux) == XMC_GL) { |
| 1317 | |
| 1318 | /* record trampoline code entries as mst_unknown symbol. When we |
| 1319 | lookup mst symbols, we will choose mst_text over mst_unknown. */ |
| 1320 | |
| 1321 | #if 1 |
| 1322 | /* After the implementation of incremental loading of shared |
| 1323 | libraries, we don't want to access trampoline entries. This |
| 1324 | approach has a consequence of the necessity to bring the whole |
| 1325 | shared library at first, in order do anything with it (putting |
| 1326 | breakpoints, using malloc, etc). On the other side, this is |
| 1327 | consistient with gdb's behaviour on a SUN platform. */ |
| 1328 | |
| 1329 | /* Trying to prefer *real* function entry over its trampoline, |
| 1330 | by assigning `mst_unknown' type to trampoline entries fails. |
| 1331 | Gdb treats those entries as chars. FIXME. */ |
| 1332 | |
| 1333 | /* Recording this entry is necessary. Single stepping relies on |
| 1334 | this vector to get an idea about function address boundaries. */ |
| 1335 | |
| 1336 | prim_record_minimal_symbol (0, cs->c_value, mst_unknown); |
| 1337 | #else |
| 1338 | |
| 1339 | /* record trampoline code entries as mst_unknown symbol. When we |
| 1340 | lookup mst symbols, we will choose mst_text over mst_unknown. */ |
| 1341 | |
| 1342 | RECORD_MINIMAL_SYMBOL (cs->c_name, cs->c_value, mst_unknown, |
| 1343 | symname_alloced); |
| 1344 | #endif |
| 1345 | continue; |
| 1346 | } |
| 1347 | break; |
| 1348 | |
| 1349 | default : /* all other XTY_XXXs */ |
| 1350 | break; |
| 1351 | } /* switch CSECT_SMTYP() */ } |
| 1352 | |
| 1353 | switch (cs->c_sclass) { |
| 1354 | |
| 1355 | case C_FILE: |
| 1356 | |
| 1357 | /* see if the last csect needs to be recorded. */ |
| 1358 | |
| 1359 | if (last_csect_name && !misc_func_recorded) { |
| 1360 | |
| 1361 | /* if no misc. function recorded in the last seen csect, enter |
| 1362 | it as a function. This will take care of functions like |
| 1363 | strcmp() compiled by xlc. */ |
| 1364 | |
| 1365 | int alloced = 0; |
| 1366 | RECORD_MINIMAL_SYMBOL (last_csect_name, last_csect_val, |
| 1367 | mst_text, alloced); |
| 1368 | } |
| 1369 | |
| 1370 | /* c_value field contains symnum of next .file entry in table |
| 1371 | or symnum of first global after last .file. */ |
| 1372 | |
| 1373 | next_file_symnum = cs->c_value; |
| 1374 | |
| 1375 | /* complete symbol table for last object file containing |
| 1376 | debugging information. */ |
| 1377 | |
| 1378 | /* Whether or not there was a csect in the previous file, we have to call |
| 1379 | `end_stabs' and `start_stabs' to reset type_vector, |
| 1380 | line_vector, etc. structures. */ |
| 1381 | |
| 1382 | complete_symtab (filestring, file_start_addr); |
| 1383 | cur_src_end_addr = file_end_addr; |
| 1384 | end_symtab (file_end_addr, 1, 0, objfile); |
| 1385 | end_stabs (); |
| 1386 | start_stabs (); |
| 1387 | start_symtab (cs->c_name, (char *)NULL, (CORE_ADDR)0); |
| 1388 | last_csect_name = 0; |
| 1389 | |
| 1390 | /* reset file start and end addresses. A compilation unit with no text |
| 1391 | (only data) should have zero file boundaries. */ |
| 1392 | file_start_addr = file_end_addr = 0; |
| 1393 | |
| 1394 | filestring = cs->c_name; |
| 1395 | break; |
| 1396 | |
| 1397 | |
| 1398 | case C_FUN: |
| 1399 | |
| 1400 | #ifdef NO_DEFINE_SYMBOL |
| 1401 | /* For a function stab, just save its type in `fcn_type_saved', and leave |
| 1402 | it for the `.bf' processing. */ |
| 1403 | { |
| 1404 | char *pp = (char*) index (cs->c_name, ':'); |
| 1405 | |
| 1406 | if (!pp || ( *(pp+1) != 'F' && *(pp+1) != 'f')) |
| 1407 | fatal ("Unrecognized stab"); |
| 1408 | pp += 2; |
| 1409 | |
| 1410 | if (fcn_type_saved) |
| 1411 | fatal ("Unprocessed function type"); |
| 1412 | |
| 1413 | fcn_type_saved = lookup_function_type (read_type (&pp, objfile)); |
| 1414 | } |
| 1415 | #else |
| 1416 | fcn_stab_saved = *cs; |
| 1417 | #endif |
| 1418 | break; |
| 1419 | |
| 1420 | |
| 1421 | case C_FCN: |
| 1422 | if (strcmp (cs->c_name, ".bf") == 0) { |
| 1423 | |
| 1424 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1425 | main_aux); |
| 1426 | |
| 1427 | within_function = 1; |
| 1428 | |
| 1429 | /* Linenos are now processed on a file-by-file, not fn-by-fn, basis. |
| 1430 | Metin did it, I'm not sure why. FIXME. -- gnu@cygnus.com */ |
| 1431 | |
| 1432 | /* Two reasons: |
| 1433 | |
| 1434 | 1) xlc (IBM's native c compiler) postpones static function code |
| 1435 | emission to the end of a compilation unit. This way it can |
| 1436 | determine if those functions (statics) are needed or not, and |
| 1437 | can do some garbage collection (I think). This makes line |
| 1438 | numbers and corresponding addresses unordered, and we end up |
| 1439 | with a line table like: |
| 1440 | |
| 1441 | |
| 1442 | lineno addr |
| 1443 | foo() 10 0x100 |
| 1444 | 20 0x200 |
| 1445 | 30 0x300 |
| 1446 | |
| 1447 | foo3() 70 0x400 |
| 1448 | 80 0x500 |
| 1449 | 90 0x600 |
| 1450 | |
| 1451 | static foo2() |
| 1452 | 40 0x700 |
| 1453 | 50 0x800 |
| 1454 | 60 0x900 |
| 1455 | |
| 1456 | and that breaks gdb's binary search on line numbers, if the |
| 1457 | above table is not sorted on line numbers. And that sort |
| 1458 | should be on function based, since gcc can emit line numbers |
| 1459 | like: |
| 1460 | |
| 1461 | 10 0x100 - for the init/test part of a for stmt. |
| 1462 | 20 0x200 |
| 1463 | 30 0x300 |
| 1464 | 10 0x400 - for the increment part of a for stmt. |
| 1465 | |
| 1466 | arrange_linenos() will do this sorting. |
| 1467 | |
| 1468 | |
| 1469 | 2) aix symbol table might look like: |
| 1470 | |
| 1471 | c_file // beginning of a new file |
| 1472 | .bi // beginning of include file |
| 1473 | .ei // end of include file |
| 1474 | .bi |
| 1475 | .ei |
| 1476 | |
| 1477 | basically, .bi/.ei pairs do not necessarily encapsulate |
| 1478 | their scope. They need to be recorded, and processed later |
| 1479 | on when we come the end of the compilation unit. |
| 1480 | Include table (inclTable) and process_linenos() handle |
| 1481 | that. |
| 1482 | */ |
| 1483 | mark_first_line (fcn_line_offset, cs->c_symnum); |
| 1484 | |
| 1485 | new = push_context (0, fcn_start_addr); |
| 1486 | |
| 1487 | #ifdef NO_DEFINE_SYMBOL |
| 1488 | new->name = process_xcoff_symbol (&fcn_cs_saved, objfile); |
| 1489 | |
| 1490 | /* Between a function symbol and `.bf', there always will be a function |
| 1491 | stab. We save function type when processing that stab. */ |
| 1492 | |
| 1493 | if (fcn_type_saved == NULL) { |
| 1494 | printf ("Unknown function type: symbol 0x%x\n", cs->c_symnum); |
| 1495 | SYMBOL_TYPE (new->name) = lookup_function_type (builtin_type_int); |
| 1496 | } |
| 1497 | else { |
| 1498 | SYMBOL_TYPE (new->name) = fcn_type_saved; |
| 1499 | fcn_type_saved = NULL; |
| 1500 | } |
| 1501 | #else |
| 1502 | new->name = define_symbol |
| 1503 | (fcn_cs_saved.c_value, fcn_stab_saved.c_name, 0, 0, objfile); |
| 1504 | #endif |
| 1505 | } |
| 1506 | else if (strcmp (cs->c_name, ".ef") == 0) { |
| 1507 | |
| 1508 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1509 | main_aux); |
| 1510 | |
| 1511 | /* the value of .ef is the address of epilogue code; |
| 1512 | not useful for gdb */ |
| 1513 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno |
| 1514 | contains number of lines to '}' */ |
| 1515 | |
| 1516 | fcn_last_line = main_aux->x_sym.x_misc.x_lnsz.x_lnno; |
| 1517 | new = pop_context (); |
| 1518 | if (context_stack_depth != 0) |
| 1519 | error ("invalid symbol data; .bf/.ef/.bb/.eb symbol mismatch, at symbol %d.", |
| 1520 | symnum); |
| 1521 | |
| 1522 | finish_block (new->name, &local_symbols, new->old_blocks, |
| 1523 | new->start_addr, |
| 1524 | fcn_cs_saved.c_value + |
| 1525 | fcn_aux_saved.x_sym.x_misc.x_fsize, objfile); |
| 1526 | within_function = 0; |
| 1527 | } |
| 1528 | break; |
| 1529 | |
| 1530 | case C_BSTAT : /* begin static block */ |
| 1531 | static_block_base = read_symbol_nvalue (symtbl, cs->c_value); |
| 1532 | break; |
| 1533 | |
| 1534 | case C_ESTAT : /* end of static block */ |
| 1535 | static_block_base = 0; |
| 1536 | break; |
| 1537 | |
| 1538 | case C_ARG : /* These are not implemented. */ |
| 1539 | case C_REGPARM : |
| 1540 | case C_TPDEF : |
| 1541 | case C_STRTAG : |
| 1542 | case C_UNTAG : |
| 1543 | case C_ENTAG : |
| 1544 | printf ("ERROR: Unimplemented storage class: %d.\n", cs->c_sclass); |
| 1545 | break; |
| 1546 | |
| 1547 | case C_HIDEXT : /* ignore these.. */ |
| 1548 | case C_LABEL : |
| 1549 | case C_NULL : |
| 1550 | break; |
| 1551 | |
| 1552 | case C_BINCL : /* beginning of include file */ |
| 1553 | |
| 1554 | /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted |
| 1555 | order. Thus, when wee see them, we might not know enough info |
| 1556 | to process them. Thus, we'll be saving them into a table |
| 1557 | (inclTable) and postpone their processing. */ |
| 1558 | |
| 1559 | record_include_begin (cs); |
| 1560 | break; |
| 1561 | |
| 1562 | case C_EINCL : /* end of include file */ |
| 1563 | /* see the comment after case C_BINCL. */ |
| 1564 | record_include_end (cs); |
| 1565 | break; |
| 1566 | |
| 1567 | case C_BLOCK : |
| 1568 | if (strcmp (cs->c_name, ".bb") == 0) { |
| 1569 | depth++; |
| 1570 | new = push_context (depth, cs->c_value); |
| 1571 | } |
| 1572 | else if (strcmp (cs->c_name, ".eb") == 0) { |
| 1573 | new = pop_context (); |
| 1574 | if (depth != new->depth) |
| 1575 | error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.", |
| 1576 | symnum); |
| 1577 | |
| 1578 | depth--; |
| 1579 | if (local_symbols && context_stack_depth > 0) { |
| 1580 | /* Make a block for the local symbols within. */ |
| 1581 | finish_block (new->name, &local_symbols, new->old_blocks, |
| 1582 | new->start_addr, cs->c_value, objfile); |
| 1583 | } |
| 1584 | local_symbols = new->locals; |
| 1585 | } |
| 1586 | break; |
| 1587 | |
| 1588 | default : |
| 1589 | process_xcoff_symbol (cs, objfile); |
| 1590 | break; |
| 1591 | } |
| 1592 | |
| 1593 | } /* while */ |
| 1594 | |
| 1595 | if (last_source_file) |
| 1596 | { |
| 1597 | end_symtab (cur_src_end_addr, 1, 0, objfile); |
| 1598 | end_stabs (); |
| 1599 | } |
| 1600 | |
| 1601 | free (symtbl); |
| 1602 | current_objfile = NULL; |
| 1603 | |
| 1604 | /* Record the toc offset value of this symbol table into ldinfo structure. |
| 1605 | If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain |
| 1606 | this information would be file auxiliary header. */ |
| 1607 | |
| 1608 | xcoff_add_toc_to_loadinfo (toc_offset); |
| 1609 | } |
| 1610 | |
| 1611 | #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \ |
| 1612 | (SYMBOL2) = (struct symbol *) \ |
| 1613 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \ |
| 1614 | *(SYMBOL2) = *(SYMBOL1); |
| 1615 | |
| 1616 | |
| 1617 | #define SYMNAME_ALLOC(NAME, ALLOCED) \ |
| 1618 | (ALLOCED) ? (NAME) : obstack_copy0 (&objfile->symbol_obstack, (NAME), strlen (NAME)); |
| 1619 | |
| 1620 | |
| 1621 | /* process one xcoff symbol. */ |
| 1622 | |
| 1623 | static struct symbol * |
| 1624 | process_xcoff_symbol (cs, objfile) |
| 1625 | register struct coff_symbol *cs; |
| 1626 | struct objfile *objfile; |
| 1627 | { |
| 1628 | struct symbol onesymbol; |
| 1629 | register struct symbol *sym = &onesymbol; |
| 1630 | struct symbol *sym2 = NULL; |
| 1631 | struct type *ttype; |
| 1632 | char *name, *pp, *qq; |
| 1633 | int struct_and_type_combined; |
| 1634 | int nameless; |
| 1635 | |
| 1636 | name = cs->c_name; |
| 1637 | if (name[0] == '.') |
| 1638 | ++name; |
| 1639 | |
| 1640 | bzero (sym, sizeof (struct symbol)); |
| 1641 | |
| 1642 | /* default assumptions */ |
| 1643 | SYMBOL_VALUE (sym) = cs->c_value; |
| 1644 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
| 1645 | |
| 1646 | if (ISFCN (cs->c_type)) { |
| 1647 | |
| 1648 | /* At this point, we don't know the type of the function and assume it |
| 1649 | is int. This will be patched with the type from its stab entry later |
| 1650 | on in patch_block_stabs () */ |
| 1651 | |
| 1652 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); |
| 1653 | SYMBOL_TYPE (sym) = lookup_function_type (lookup_fundamental_type (objfile, FT_INTEGER)); |
| 1654 | |
| 1655 | SYMBOL_CLASS (sym) = LOC_BLOCK; |
| 1656 | SYMBOL_DUP (sym, sym2); |
| 1657 | |
| 1658 | if (cs->c_sclass == C_EXT) |
| 1659 | add_symbol_to_list (sym2, &global_symbols); |
| 1660 | else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT) |
| 1661 | add_symbol_to_list (sym2, &file_symbols); |
| 1662 | } |
| 1663 | |
| 1664 | else { |
| 1665 | |
| 1666 | /* in case we can't figure out the type, default is `int'. */ |
| 1667 | SYMBOL_TYPE (sym) = lookup_fundamental_type (objfile, FT_INTEGER); |
| 1668 | |
| 1669 | switch (cs->c_sclass) |
| 1670 | { |
| 1671 | #if 0 |
| 1672 | case C_FUN: |
| 1673 | if (fcn_cs_saved.c_sclass == C_EXT) |
| 1674 | add_stab_to_list (name, &global_stabs); |
| 1675 | else |
| 1676 | add_stab_to_list (name, &file_stabs); |
| 1677 | break; |
| 1678 | #endif |
| 1679 | |
| 1680 | case C_DECL: /* a type decleration?? */ |
| 1681 | |
| 1682 | #if defined(NO_TYPEDEFS) || defined(NO_DEFINE_SYMBOL) |
| 1683 | qq = (char*) strchr (name, ':'); |
| 1684 | if (!qq) /* skip if there is no ':' */ |
| 1685 | return NULL; |
| 1686 | |
| 1687 | nameless = (qq == name); |
| 1688 | |
| 1689 | struct_and_type_combined = (qq[1] == 'T' && qq[2] == 't'); |
| 1690 | pp = qq + (struct_and_type_combined ? 3 : 2); |
| 1691 | |
| 1692 | |
| 1693 | /* To handle GNU C++ typename abbreviation, we need to be able to fill |
| 1694 | in a type's name as soon as space for that type is allocated. */ |
| 1695 | |
| 1696 | if (struct_and_type_combined && name != qq) { |
| 1697 | |
| 1698 | int typenums[2]; |
| 1699 | struct type *tmp_type; |
| 1700 | char *tmp_pp = pp; |
| 1701 | |
| 1702 | read_type_number (&tmp_pp, typenums); |
| 1703 | tmp_type = dbx_alloc_type (typenums, objfile); |
| 1704 | |
| 1705 | if (tmp_type && !TYPE_NAME (tmp_type) && !nameless) |
| 1706 | TYPE_NAME (tmp_type) = SYMBOL_NAME (sym) = |
| 1707 | obsavestring (name, qq-name, |
| 1708 | &objfile->symbol_obstack); |
| 1709 | } |
| 1710 | ttype = SYMBOL_TYPE (sym) = read_type (&pp); |
| 1711 | |
| 1712 | /* if there is no name for this typedef, you don't have to keep its |
| 1713 | symbol, since nobody could ask for it. Otherwise, build a symbol |
| 1714 | and add it into symbol_list. */ |
| 1715 | |
| 1716 | if (nameless) |
| 1717 | return; |
| 1718 | |
| 1719 | #ifdef NO_TYPEDEFS |
| 1720 | /* Transarc wants to eliminate type definitions from the symbol table. |
| 1721 | Limited debugging capabilities, but faster symbol table processing |
| 1722 | and less memory usage. Note that tag definitions (starting with |
| 1723 | 'T') will remain intact. */ |
| 1724 | |
| 1725 | if (qq[1] != 'T' && (!TYPE_NAME (ttype) || *(TYPE_NAME (ttype)) == '\0')) { |
| 1726 | |
| 1727 | if (SYMBOL_NAME (sym)) |
| 1728 | TYPE_NAME (ttype) = SYMBOL_NAME (sym); |
| 1729 | else |
| 1730 | TYPE_NAME (ttype) = obsavestring (name, qq-name); |
| 1731 | |
| 1732 | return; |
| 1733 | } |
| 1734 | |
| 1735 | #endif /* !NO_TYPEDEFS */ |
| 1736 | |
| 1737 | /* read_type() will return null if type (or tag) definition was |
| 1738 | unnnecessarily duplicated. Also, if the symbol doesn't have a name, |
| 1739 | there is no need to keep it in symbol table. */ |
| 1740 | /* The above argument no longer valid. read_type() never returns NULL. */ |
| 1741 | |
| 1742 | if (!ttype) |
| 1743 | return NULL; |
| 1744 | |
| 1745 | /* if there is no name for this typedef, you don't have to keep its |
| 1746 | symbol, since nobody could ask for it. Otherwise, build a symbol |
| 1747 | and add it into symbol_list. */ |
| 1748 | |
| 1749 | if (qq[1] == 'T') |
| 1750 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; |
| 1751 | else if (qq[1] == 't') |
| 1752 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
| 1753 | else { |
| 1754 | warning ("Unrecognized stab string.\n"); |
| 1755 | return NULL; |
| 1756 | } |
| 1757 | |
| 1758 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
| 1759 | if (!SYMBOL_NAME (sym)) |
| 1760 | SYMBOL_NAME (sym) = obsavestring (name, qq-name); |
| 1761 | |
| 1762 | SYMBOL_DUP (sym, sym2); |
| 1763 | add_symbol_to_list |
| 1764 | (sym2, within_function ? &local_symbols : &file_symbols); |
| 1765 | |
| 1766 | /* For a combination of struct and type, add one more symbol |
| 1767 | for the type. */ |
| 1768 | |
| 1769 | if (struct_and_type_combined) { |
| 1770 | SYMBOL_DUP (sym, sym2); |
| 1771 | SYMBOL_NAMESPACE (sym2) = VAR_NAMESPACE; |
| 1772 | add_symbol_to_list |
| 1773 | (sym2, within_function ? &local_symbols : &file_symbols); |
| 1774 | } |
| 1775 | |
| 1776 | /* assign a name to the type node. */ |
| 1777 | |
| 1778 | if (!TYPE_NAME (ttype) || *(TYPE_NAME (ttype)) == '\0') { |
| 1779 | if (struct_and_type_combined) |
| 1780 | TYPE_NAME (ttype) = SYMBOL_NAME (sym); |
| 1781 | else if (qq[1] == 'T') /* struct namespace */ |
| 1782 | TYPE_NAME (ttype) = concat ( |
| 1783 | TYPE_CODE (ttype) == TYPE_CODE_UNION ? "union " : |
| 1784 | TYPE_CODE (ttype) == TYPE_CODE_STRUCT? "struct " : "enum ", |
| 1785 | SYMBOL_NAME (sym), NULL); |
| 1786 | } |
| 1787 | break; |
| 1788 | |
| 1789 | #else /* !NO_DEFINE_SYMBOL */ |
| 1790 | return define_symbol (cs->c_value, cs->c_name, 0, 0, objfile); |
| 1791 | #endif |
| 1792 | |
| 1793 | case C_GSYM: |
| 1794 | add_stab_to_list (name, &global_stabs); |
| 1795 | break; |
| 1796 | |
| 1797 | case C_PSYM: |
| 1798 | case C_RPSYM: |
| 1799 | |
| 1800 | #ifdef NO_DEFINE_SYMBOL |
| 1801 | if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL) |
| 1802 | return NULL; |
| 1803 | SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack); |
| 1804 | SYMBOL_CLASS (sym) = (cs->c_sclass == C_PSYM) ? LOC_ARG : LOC_REGPARM; |
| 1805 | pp += 2; |
| 1806 | SYMBOL_TYPE (sym) = read_type (&pp, objfile); |
| 1807 | SYMBOL_DUP (sym, sym2); |
| 1808 | add_symbol_to_list (sym2, &local_symbols); |
| 1809 | break; |
| 1810 | #else |
| 1811 | sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile); |
| 1812 | SYMBOL_CLASS (sym) = (cs->c_sclass == C_PSYM) ? LOC_ARG : LOC_REGPARM; |
| 1813 | return sym; |
| 1814 | #endif |
| 1815 | |
| 1816 | case C_STSYM: |
| 1817 | |
| 1818 | #ifdef NO_DEFINE_SYMBOL |
| 1819 | if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL) |
| 1820 | return NULL; |
| 1821 | SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack); |
| 1822 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 1823 | SYMBOL_VALUE (sym) += static_block_base; |
| 1824 | pp += 2; |
| 1825 | SYMBOL_TYPE (sym) = read_type (&pp, objfile); |
| 1826 | SYMBOL_DUP (sym, sym2); |
| 1827 | add_symbol_to_list |
| 1828 | (sym2, within_function ? &local_symbols : &file_symbols); |
| 1829 | break; |
| 1830 | #else |
| 1831 | /* If we are going to use Sun dbx's define_symbol(), we need to |
| 1832 | massage our stab string a little. Change 'V' type to 'S' to be |
| 1833 | comparible with Sun. */ |
| 1834 | |
| 1835 | if (*name == ':' || (pp = (char *) index (name, ':')) == NULL) |
| 1836 | return NULL; |
| 1837 | |
| 1838 | ++pp; |
| 1839 | if (*pp == 'V') *pp = 'S'; |
| 1840 | sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile); |
| 1841 | SYMBOL_VALUE (sym) += static_block_base; |
| 1842 | return sym; |
| 1843 | #endif |
| 1844 | |
| 1845 | case C_LSYM: |
| 1846 | if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL) |
| 1847 | return NULL; |
| 1848 | SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack); |
| 1849 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
| 1850 | pp += 1; |
| 1851 | SYMBOL_TYPE (sym) = read_type (&pp, objfile); |
| 1852 | SYMBOL_DUP (sym, sym2); |
| 1853 | add_symbol_to_list (sym2, &local_symbols); |
| 1854 | break; |
| 1855 | |
| 1856 | case C_AUTO: |
| 1857 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
| 1858 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); |
| 1859 | SYMBOL_DUP (sym, sym2); |
| 1860 | add_symbol_to_list (sym2, &local_symbols); |
| 1861 | break; |
| 1862 | |
| 1863 | case C_EXT: |
| 1864 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 1865 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); |
| 1866 | SYMBOL_DUP (sym, sym2); |
| 1867 | add_symbol_to_list (sym2, &global_symbols); |
| 1868 | break; |
| 1869 | |
| 1870 | case C_STAT: |
| 1871 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 1872 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); |
| 1873 | SYMBOL_DUP (sym, sym2); |
| 1874 | add_symbol_to_list |
| 1875 | (sym2, within_function ? &local_symbols : &file_symbols); |
| 1876 | break; |
| 1877 | |
| 1878 | case C_REG: |
| 1879 | printf ("ERROR! C_REG is not fully implemented!\n"); |
| 1880 | SYMBOL_CLASS (sym) = LOC_REGISTER; |
| 1881 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); |
| 1882 | SYMBOL_DUP (sym, sym2); |
| 1883 | add_symbol_to_list (sym2, &local_symbols); |
| 1884 | break; |
| 1885 | |
| 1886 | case C_RSYM: |
| 1887 | |
| 1888 | #ifdef NO_DEFINE_SYMBOL |
| 1889 | pp = (char*) strchr (name, ':'); |
| 1890 | SYMBOL_CLASS (sym) = LOC_REGISTER; |
| 1891 | SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (cs->c_value); |
| 1892 | if (pp) { |
| 1893 | SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack); |
| 1894 | pp += 2; |
| 1895 | if (*pp) |
| 1896 | SYMBOL_TYPE (sym) = read_type (&pp, objfile); |
| 1897 | } |
| 1898 | else |
| 1899 | /* else this is not a stab entry, suppose the type is either |
| 1900 | `int' or `float', depending on the register class. */ |
| 1901 | |
| 1902 | SYMBOL_TYPE (sym) = (SYMBOL_VALUE (sym) < 32) |
| 1903 | ? lookup_fundamental_type (objfile, FT_INTEGER) |
| 1904 | : lookup_fundamental_type (objfile, FT_FLOAT); |
| 1905 | |
| 1906 | SYMBOL_DUP (sym, sym2); |
| 1907 | add_symbol_to_list (sym2, &local_symbols); |
| 1908 | break; |
| 1909 | #else |
| 1910 | if (pp) { |
| 1911 | sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile); |
| 1912 | return sym; |
| 1913 | } |
| 1914 | else { |
| 1915 | warning ("A non-stab C_RSYM needs special handling."); |
| 1916 | return NULL; |
| 1917 | } |
| 1918 | #endif |
| 1919 | |
| 1920 | default : |
| 1921 | warning ("Unexpected storage class: %d.", cs->c_sclass); |
| 1922 | return NULL; |
| 1923 | } |
| 1924 | } |
| 1925 | return sym2; |
| 1926 | } |
| 1927 | |
| 1928 | |
| 1929 | static int |
| 1930 | read_symbol_nvalue (symtable, symno) |
| 1931 | char *symtable; |
| 1932 | int symno; |
| 1933 | { |
| 1934 | struct internal_syment symbol[1]; |
| 1935 | |
| 1936 | bfd_coff_swap_sym_in (symfile_bfd, symtable + (symno*local_symesz), symbol); |
| 1937 | return symbol->n_value; |
| 1938 | } |
| 1939 | |
| 1940 | |
| 1941 | static int |
| 1942 | read_symbol_lineno (symtable, symno) |
| 1943 | char *symtable; |
| 1944 | int symno; |
| 1945 | { |
| 1946 | struct internal_syment symbol[1]; |
| 1947 | union internal_auxent main_aux[1]; |
| 1948 | |
| 1949 | int ii; |
| 1950 | |
| 1951 | for (ii = 0; ii < 50; ii++) { |
| 1952 | bfd_coff_swap_sym_in (symfile_bfd, |
| 1953 | symtable + (symno*local_symesz), symbol); |
| 1954 | if (symbol->n_sclass == C_FCN && 0 == strcmp (symbol->n_name, ".bf")) |
| 1955 | goto gotit; |
| 1956 | symno += symbol->n_numaux+1; |
| 1957 | } |
| 1958 | |
| 1959 | printf ("GDB Error: `.bf' not found.\n"); |
| 1960 | return 0; |
| 1961 | |
| 1962 | gotit: |
| 1963 | /* take aux entry and return its lineno */ |
| 1964 | symno++; |
| 1965 | bfd_coff_swap_aux_in (symfile_bfd, symtable+(symno*local_symesz), |
| 1966 | symbol->n_type, symbol->n_sclass, main_aux); |
| 1967 | |
| 1968 | return main_aux->x_sym.x_misc.x_lnsz.x_lnno; |
| 1969 | } |
| 1970 | |
| 1971 | /* Support for line number handling */ |
| 1972 | |
| 1973 | /* This function is called for every section; it finds the outer limits |
| 1974 | * of the line table (minimum and maximum file offset) so that the |
| 1975 | * mainline code can read the whole thing for efficiency. |
| 1976 | */ |
| 1977 | static void |
| 1978 | find_linenos(abfd, asect, vpinfo) |
| 1979 | bfd *abfd; |
| 1980 | sec_ptr asect; |
| 1981 | PTR vpinfo; |
| 1982 | { |
| 1983 | struct coff_symfile_info *info; |
| 1984 | int size, count; |
| 1985 | file_ptr offset, maxoff; |
| 1986 | |
| 1987 | count = asect->lineno_count; |
| 1988 | |
| 1989 | if (strcmp (asect->name, ".text") || count == 0) |
| 1990 | return; |
| 1991 | |
| 1992 | size = count * coff_data (symfile_bfd)->local_linesz; |
| 1993 | info = (struct coff_symfile_info *)vpinfo; |
| 1994 | offset = asect->line_filepos; |
| 1995 | maxoff = offset + size; |
| 1996 | |
| 1997 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) |
| 1998 | info->min_lineno_offset = offset; |
| 1999 | |
| 2000 | if (maxoff > info->max_lineno_offset) |
| 2001 | info->max_lineno_offset = maxoff; |
| 2002 | } |
| 2003 | |
| 2004 | |
| 2005 | /* Read in all the line numbers for fast lookups later. Leave them in |
| 2006 | external (unswapped) format in memory; we'll swap them as we enter |
| 2007 | them into GDB's data structures. */ |
| 2008 | |
| 2009 | static int |
| 2010 | init_lineno (abfd, offset, size) |
| 2011 | bfd *abfd; |
| 2012 | long offset; |
| 2013 | int size; |
| 2014 | { |
| 2015 | int val; |
| 2016 | |
| 2017 | if (bfd_seek(abfd, offset, 0) < 0) |
| 2018 | return -1; |
| 2019 | |
| 2020 | linetab = (char *) xmalloc(size); |
| 2021 | |
| 2022 | val = bfd_read(linetab, 1, size, abfd); |
| 2023 | if (val != size) |
| 2024 | return -1; |
| 2025 | |
| 2026 | linetab_offset = offset; |
| 2027 | linetab_size = size; |
| 2028 | make_cleanup (free, linetab); /* Be sure it gets de-allocated. */ |
| 2029 | return 0; |
| 2030 | } |
| 2031 | \f |
| 2032 | /* dbx allows the text of a symbol name to be continued into the |
| 2033 | next symbol name! When such a continuation is encountered |
| 2034 | (a \ at the end of the text of a name) |
| 2035 | call this function to get the continuation. */ |
| 2036 | /* So far, I haven't seen this happenning xlc output. I doubt we'll need this |
| 2037 | for xcoff. */ |
| 2038 | |
| 2039 | #undef next_symbol_text |
| 2040 | #define next_symbol_text() \ |
| 2041 | printf ("Gdb Error: symbol names on multiple lines not implemented.\n") |
| 2042 | |
| 2043 | |
| 2044 | /* xlc/dbx combination uses a set of builtin types, starting from -1. return |
| 2045 | the proper type node fora given builtin type #. */ |
| 2046 | |
| 2047 | struct type * |
| 2048 | builtin_type (pp) |
| 2049 | char **pp; |
| 2050 | { |
| 2051 | int typenums[2]; |
| 2052 | |
| 2053 | if (**pp != '-') { |
| 2054 | printf ("ERROR!, unknown built-in type!\n"); |
| 2055 | return NULL; |
| 2056 | } |
| 2057 | *pp += 1; |
| 2058 | read_type_number (pp, typenums); |
| 2059 | |
| 2060 | /* default types are defined in dbxstclass.h. */ |
| 2061 | switch ( typenums[1] ) { |
| 2062 | case 1: |
| 2063 | return lookup_fundamental_type (current_objfile, FT_INTEGER); |
| 2064 | case 2: |
| 2065 | return lookup_fundamental_type (current_objfile, FT_CHAR); |
| 2066 | case 3: |
| 2067 | return lookup_fundamental_type (current_objfile, FT_SHORT); |
| 2068 | case 4: |
| 2069 | return lookup_fundamental_type (current_objfile, FT_LONG); |
| 2070 | case 5: |
| 2071 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); |
| 2072 | case 6: |
| 2073 | return lookup_fundamental_type (current_objfile, FT_SIGNED_CHAR); |
| 2074 | case 7: |
| 2075 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); |
| 2076 | case 8: |
| 2077 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); |
| 2078 | case 9: |
| 2079 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); |
| 2080 | case 10: |
| 2081 | return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG); |
| 2082 | case 11: |
| 2083 | return lookup_fundamental_type (current_objfile, FT_VOID); |
| 2084 | case 12: |
| 2085 | return lookup_fundamental_type (current_objfile, FT_FLOAT); |
| 2086 | case 13: |
| 2087 | return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); |
| 2088 | case 14: |
| 2089 | return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); |
| 2090 | case 15: |
| 2091 | /* requires a builtin `integer' */ |
| 2092 | return lookup_fundamental_type (current_objfile, FT_INTEGER); |
| 2093 | case 16: |
| 2094 | return lookup_fundamental_type (current_objfile, FT_BOOLEAN); |
| 2095 | case 17: |
| 2096 | /* requires builtin `short real' */ |
| 2097 | return lookup_fundamental_type (current_objfile, FT_FLOAT); |
| 2098 | case 18: |
| 2099 | /* requires builtin `real' */ |
| 2100 | return lookup_fundamental_type (current_objfile, FT_FLOAT); |
| 2101 | default : |
| 2102 | printf ("ERROR! Unknown builtin type -%d\n", typenums[1]); |
| 2103 | return NULL; |
| 2104 | } |
| 2105 | } |
| 2106 | |
| 2107 | static void |
| 2108 | xcoff_new_init (objfile) |
| 2109 | struct objfile *objfile; |
| 2110 | { |
| 2111 | } |
| 2112 | |
| 2113 | static void |
| 2114 | xcoff_symfile_init (objfile) |
| 2115 | struct objfile *objfile; |
| 2116 | { |
| 2117 | bfd *abfd = objfile->obfd; |
| 2118 | |
| 2119 | /* Allocate struct to keep track of the symfile */ |
| 2120 | objfile -> sym_private = xmmalloc (objfile -> md, |
| 2121 | sizeof (struct coff_symfile_info)); |
| 2122 | init_entry_point_info (objfile); |
| 2123 | } |
| 2124 | |
| 2125 | /* Perform any local cleanups required when we are done with a particular |
| 2126 | objfile. I.E, we are in the process of discarding all symbol information |
| 2127 | for an objfile, freeing up all memory held for it, and unlinking the |
| 2128 | objfile struct from the global list of known objfiles. */ |
| 2129 | |
| 2130 | static void |
| 2131 | xcoff_symfile_finish (objfile) |
| 2132 | struct objfile *objfile; |
| 2133 | { |
| 2134 | if (objfile -> sym_private != NULL) |
| 2135 | { |
| 2136 | mfree (objfile -> md, objfile -> sym_private); |
| 2137 | } |
| 2138 | |
| 2139 | /* Start with a fresh include table for the next objfile. */ |
| 2140 | |
| 2141 | if (inclTable) |
| 2142 | { |
| 2143 | free (inclTable); |
| 2144 | inclTable = NULL; |
| 2145 | } |
| 2146 | inclIndx = inclLength = inclDepth = 0; |
| 2147 | } |
| 2148 | |
| 2149 | |
| 2150 | static int |
| 2151 | init_stringtab(abfd, offset, objfile) |
| 2152 | bfd *abfd; |
| 2153 | long offset; |
| 2154 | struct objfile *objfile; |
| 2155 | { |
| 2156 | long length; |
| 2157 | int val; |
| 2158 | unsigned char lengthbuf[4]; |
| 2159 | |
| 2160 | if (bfd_seek(abfd, offset, 0) < 0) |
| 2161 | return -1; |
| 2162 | |
| 2163 | val = bfd_read((char *)lengthbuf, 1, sizeof lengthbuf, abfd); |
| 2164 | length = bfd_h_get_32(abfd, lengthbuf); |
| 2165 | |
| 2166 | /* If no string table is needed, then the file may end immediately |
| 2167 | after the symbols. Just return with `strtbl' set to null. */ |
| 2168 | |
| 2169 | if (val != sizeof length || length < sizeof length) |
| 2170 | return 0; |
| 2171 | |
| 2172 | /* Allocate string table from symbol_obstack. We will need this table |
| 2173 | as long as we have its symbol table around. */ |
| 2174 | |
| 2175 | strtbl = (char*) obstack_alloc (&objfile->symbol_obstack, length); |
| 2176 | if (strtbl == NULL) |
| 2177 | return -1; |
| 2178 | |
| 2179 | bcopy(&length, strtbl, sizeof length); |
| 2180 | if (length == sizeof length) |
| 2181 | return 0; |
| 2182 | |
| 2183 | val = bfd_read(strtbl + sizeof length, 1, length - sizeof length, abfd); |
| 2184 | |
| 2185 | if (val != length - sizeof length || strtbl[length - 1] != '\0') |
| 2186 | return -1; |
| 2187 | |
| 2188 | return 0; |
| 2189 | } |
| 2190 | |
| 2191 | static int |
| 2192 | init_debugsection(abfd) |
| 2193 | bfd *abfd; |
| 2194 | { |
| 2195 | register sec_ptr secp; |
| 2196 | bfd_size_type length; |
| 2197 | |
| 2198 | if (debugsec) { |
| 2199 | free(debugsec); |
| 2200 | debugsec = NULL; |
| 2201 | } |
| 2202 | |
| 2203 | secp = bfd_get_section_by_name(abfd, ".debug"); |
| 2204 | if (!secp) |
| 2205 | return 0; |
| 2206 | |
| 2207 | if (!(length = bfd_section_size(abfd, secp))) |
| 2208 | return 0; |
| 2209 | |
| 2210 | debugsec = (char *) xmalloc ((unsigned)length); |
| 2211 | if (debugsec == NULL) |
| 2212 | return -1; |
| 2213 | |
| 2214 | if (!bfd_get_section_contents(abfd, secp, debugsec, (file_ptr) 0, length)) { |
| 2215 | printf ("Can't read .debug section from symbol file\n"); |
| 2216 | return -1; |
| 2217 | } |
| 2218 | return 0; |
| 2219 | } |
| 2220 | |
| 2221 | static void |
| 2222 | free_debugsection() |
| 2223 | { |
| 2224 | if (debugsec) |
| 2225 | free(debugsec); |
| 2226 | debugsec = NULL; |
| 2227 | } |
| 2228 | |
| 2229 | |
| 2230 | /* xcoff version of symbol file read. */ |
| 2231 | |
| 2232 | static void |
| 2233 | xcoff_symfile_read (objfile, section_offset, mainline) |
| 2234 | struct objfile *objfile; |
| 2235 | struct section_offset *section_offset; |
| 2236 | int mainline; |
| 2237 | { |
| 2238 | int num_symbols; /* # of symbols */ |
| 2239 | int symtab_offset; /* symbol table and */ |
| 2240 | int stringtab_offset; /* string table file offsets */ |
| 2241 | int val; |
| 2242 | bfd *abfd; |
| 2243 | struct coff_symfile_info *info; |
| 2244 | char *name; |
| 2245 | |
| 2246 | info = (struct coff_symfile_info *) objfile -> sym_private; |
| 2247 | symfile_bfd = abfd = objfile->obfd; |
| 2248 | name = objfile->name; |
| 2249 | |
| 2250 | num_symbols = bfd_get_symcount (abfd); /* # of symbols */ |
| 2251 | symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */ |
| 2252 | stringtab_offset = symtab_offset + |
| 2253 | num_symbols * coff_data(abfd)->local_symesz; |
| 2254 | |
| 2255 | info->min_lineno_offset = 0; |
| 2256 | info->max_lineno_offset = 0; |
| 2257 | bfd_map_over_sections (abfd, find_linenos, info); |
| 2258 | |
| 2259 | /* FIXME! This stuff should move into symfile_init */ |
| 2260 | if (info->min_lineno_offset != 0 |
| 2261 | && info->max_lineno_offset > info->min_lineno_offset) { |
| 2262 | |
| 2263 | /* only read in the line # table if one exists */ |
| 2264 | val = init_lineno(abfd, info->min_lineno_offset, |
| 2265 | info->max_lineno_offset - info->min_lineno_offset); |
| 2266 | |
| 2267 | if (val < 0) |
| 2268 | error("\"%s\": error reading line numbers\n", name); |
| 2269 | } |
| 2270 | |
| 2271 | val = init_stringtab(abfd, stringtab_offset, objfile); |
| 2272 | if (val < 0) { |
| 2273 | error ("\"%s\": can't get string table", name); |
| 2274 | } |
| 2275 | |
| 2276 | if (init_debugsection(abfd) < 0) { |
| 2277 | error ("Error reading .debug section of `%s'\n", name); |
| 2278 | } |
| 2279 | |
| 2280 | /* Position to read the symbol table. Do not read it all at once. */ |
| 2281 | val = bfd_seek(abfd, (long)symtab_offset, 0); |
| 2282 | if (val < 0) |
| 2283 | perror_with_name(name); |
| 2284 | |
| 2285 | if (bfd_tell(abfd) != symtab_offset) |
| 2286 | fatal("bfd? BFD!"); |
| 2287 | |
| 2288 | init_minimal_symbol_collection (); |
| 2289 | make_cleanup (discard_minimal_symbols, 0); |
| 2290 | |
| 2291 | /* Initialize load info structure. */ |
| 2292 | if (mainline) |
| 2293 | xcoff_init_loadinfo (); |
| 2294 | |
| 2295 | /* Now that the executable file is positioned at symbol table, |
| 2296 | process it and define symbols accordingly. */ |
| 2297 | |
| 2298 | read_xcoff_symtab(objfile, num_symbols); |
| 2299 | |
| 2300 | /* Free debug section. */ |
| 2301 | free_debugsection (); |
| 2302 | |
| 2303 | /* Sort symbols alphabetically within each block. */ |
| 2304 | sort_syms (); |
| 2305 | |
| 2306 | /* Install any minimal symbols that have been collected as the current |
| 2307 | minimal symbols for this objfile. */ |
| 2308 | |
| 2309 | install_minimal_symbols (objfile); |
| 2310 | |
| 2311 | /* Make a default for file to list. */ |
| 2312 | select_source_symtab (0); |
| 2313 | } |
| 2314 | |
| 2315 | /* XCOFF-specific parsing routine for section offsets. |
| 2316 | Plain and simple for now. */ |
| 2317 | |
| 2318 | static |
| 2319 | struct section_offsets * |
| 2320 | xcoff_symfile_offsets (objfile, addr) |
| 2321 | struct objfile *objfile; |
| 2322 | CORE_ADDR addr; |
| 2323 | { |
| 2324 | struct section_offsets *section_offsets; |
| 2325 | int i; |
| 2326 | |
| 2327 | section_offsets = (struct section_offsets *) |
| 2328 | obstack_alloc (&objfile -> psymbol_obstack, |
| 2329 | sizeof (struct section_offsets) + |
| 2330 | sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); |
| 2331 | |
| 2332 | for (i = 0; i < SECT_OFF_MAX; i++) |
| 2333 | ANOFFSET (section_offsets, i) = addr; |
| 2334 | |
| 2335 | return section_offsets; |
| 2336 | } |
| 2337 | /* Register our ability to parse symbols for xcoff BFD files. */ |
| 2338 | |
| 2339 | static struct sym_fns xcoff_sym_fns = |
| 2340 | { |
| 2341 | "aixcoff-rs6000", /* sym_name: name or name prefix of BFD target type */ |
| 2342 | 15, /* sym_namelen: number of significant sym_name chars */ |
| 2343 | xcoff_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| 2344 | xcoff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| 2345 | xcoff_symfile_read, /* sym_read: read a symbol file into symtab */ |
| 2346 | xcoff_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| 2347 | xcoff_symfile_offsets, /* sym_offsets: xlate offsets ext->int form */ |
| 2348 | NULL /* next: pointer to next struct sym_fns */ |
| 2349 | }; |
| 2350 | |
| 2351 | void |
| 2352 | _initialize_xcoffread () |
| 2353 | { |
| 2354 | add_symtab_fns(&xcoff_sym_fns); |
| 2355 | } |
| 2356 | |
| 2357 | #else /* IBM6000_HOST */ |
| 2358 | struct type * |
| 2359 | builtin_type (ignore) |
| 2360 | char **ignore; |
| 2361 | { |
| 2362 | fatal ("GDB internal error: builtin_type called on non-RS/6000!"); |
| 2363 | } |
| 2364 | #endif /* IBM6000_HOST */ |