| 1 | /* Read AIX xcoff symbol tables and convert to internal format, for GDB. |
| 2 | Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
| 3 | 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, |
| 4 | 2010 Free Software Foundation, Inc. |
| 5 | Derived from coffread.c, dbxread.c, and a lot of hacking. |
| 6 | Contributed by IBM Corporation. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "bfd.h" |
| 25 | |
| 26 | #include <sys/types.h> |
| 27 | #include <fcntl.h> |
| 28 | #include <ctype.h> |
| 29 | #include "gdb_string.h" |
| 30 | |
| 31 | #include <sys/param.h> |
| 32 | #ifdef HAVE_SYS_FILE_H |
| 33 | #include <sys/file.h> |
| 34 | #endif |
| 35 | #include "gdb_stat.h" |
| 36 | |
| 37 | #include "coff/internal.h" |
| 38 | #include "libcoff.h" /* FIXME, internal data from BFD */ |
| 39 | #include "coff/xcoff.h" |
| 40 | #include "libxcoff.h" |
| 41 | #include "coff/rs6000.h" |
| 42 | #include "xcoffread.h" |
| 43 | |
| 44 | #include "symtab.h" |
| 45 | #include "gdbtypes.h" |
| 46 | /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */ |
| 47 | #include "symfile.h" |
| 48 | #include "objfiles.h" |
| 49 | #include "buildsym.h" |
| 50 | #include "stabsread.h" |
| 51 | #include "expression.h" |
| 52 | #include "complaints.h" |
| 53 | #include "psympriv.h" |
| 54 | |
| 55 | #include "gdb-stabs.h" |
| 56 | |
| 57 | /* For interface with stabsread.c. */ |
| 58 | #include "aout/stab_gnu.h" |
| 59 | |
| 60 | \f |
| 61 | /* We put a pointer to this structure in the read_symtab_private field |
| 62 | of the psymtab. */ |
| 63 | |
| 64 | struct symloc |
| 65 | { |
| 66 | |
| 67 | /* First symbol number for this file. */ |
| 68 | |
| 69 | int first_symnum; |
| 70 | |
| 71 | /* Number of symbols in the section of the symbol table devoted to |
| 72 | this file's symbols (actually, the section bracketed may contain |
| 73 | more than just this file's symbols). If numsyms is 0, the only |
| 74 | reason for this thing's existence is the dependency list. Nothing |
| 75 | else will happen when it is read in. */ |
| 76 | |
| 77 | int numsyms; |
| 78 | |
| 79 | /* Position of the start of the line number information for this psymtab. */ |
| 80 | unsigned int lineno_off; |
| 81 | }; |
| 82 | |
| 83 | /* Remember what we deduced to be the source language of this psymtab. */ |
| 84 | |
| 85 | static enum language psymtab_language = language_unknown; |
| 86 | \f |
| 87 | |
| 88 | /* Simplified internal version of coff symbol table information */ |
| 89 | |
| 90 | struct coff_symbol |
| 91 | { |
| 92 | char *c_name; |
| 93 | int c_symnum; /* symbol number of this entry */ |
| 94 | int c_naux; /* 0 if syment only, 1 if syment + auxent */ |
| 95 | long c_value; |
| 96 | unsigned char c_sclass; |
| 97 | int c_secnum; |
| 98 | unsigned int c_type; |
| 99 | }; |
| 100 | |
| 101 | /* last function's saved coff symbol `cs' */ |
| 102 | |
| 103 | static struct coff_symbol fcn_cs_saved; |
| 104 | |
| 105 | static bfd *symfile_bfd; |
| 106 | |
| 107 | /* Core address of start and end of text of current source file. |
| 108 | This is calculated from the first function seen after a C_FILE |
| 109 | symbol. */ |
| 110 | |
| 111 | |
| 112 | static CORE_ADDR cur_src_end_addr; |
| 113 | |
| 114 | /* Core address of the end of the first object file. */ |
| 115 | |
| 116 | static CORE_ADDR first_object_file_end; |
| 117 | |
| 118 | /* initial symbol-table-debug-string vector length */ |
| 119 | |
| 120 | #define INITIAL_STABVECTOR_LENGTH 40 |
| 121 | |
| 122 | /* Nonzero if within a function (so symbols should be local, |
| 123 | if nothing says specifically). */ |
| 124 | |
| 125 | int within_function; |
| 126 | |
| 127 | /* Size of a COFF symbol. I think it is always 18, so I'm not sure |
| 128 | there is any reason not to just use a #define, but might as well |
| 129 | ask BFD for the size and store it here, I guess. */ |
| 130 | |
| 131 | static unsigned local_symesz; |
| 132 | |
| 133 | struct coff_symfile_info |
| 134 | { |
| 135 | file_ptr min_lineno_offset; /* Where in file lowest line#s are */ |
| 136 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ |
| 137 | |
| 138 | /* Pointer to the string table. */ |
| 139 | char *strtbl; |
| 140 | |
| 141 | /* Pointer to debug section. */ |
| 142 | char *debugsec; |
| 143 | |
| 144 | /* Pointer to the a.out symbol table. */ |
| 145 | char *symtbl; |
| 146 | |
| 147 | /* Number of symbols in symtbl. */ |
| 148 | int symtbl_num_syms; |
| 149 | |
| 150 | /* Offset in data section to TOC anchor. */ |
| 151 | CORE_ADDR toc_offset; |
| 152 | }; |
| 153 | |
| 154 | static void |
| 155 | bf_notfound_complaint (void) |
| 156 | { |
| 157 | complaint (&symfile_complaints, _("line numbers off, `.bf' symbol not found")); |
| 158 | } |
| 159 | |
| 160 | static void |
| 161 | ef_complaint (int arg1) |
| 162 | { |
| 163 | complaint (&symfile_complaints, |
| 164 | _("Mismatched .ef symbol ignored starting at symnum %d"), arg1); |
| 165 | } |
| 166 | |
| 167 | static void |
| 168 | eb_complaint (int arg1) |
| 169 | { |
| 170 | complaint (&symfile_complaints, |
| 171 | _("Mismatched .eb symbol ignored starting at symnum %d"), arg1); |
| 172 | } |
| 173 | |
| 174 | static void xcoff_initial_scan (struct objfile *, int); |
| 175 | |
| 176 | static void scan_xcoff_symtab (struct objfile *); |
| 177 | |
| 178 | static char *xcoff_next_symbol_text (struct objfile *); |
| 179 | |
| 180 | static void record_include_begin (struct coff_symbol *); |
| 181 | |
| 182 | static void |
| 183 | enter_line_range (struct subfile *, unsigned, unsigned, |
| 184 | CORE_ADDR, CORE_ADDR, unsigned *); |
| 185 | |
| 186 | static void init_stringtab (bfd *, file_ptr, struct objfile *); |
| 187 | |
| 188 | static void xcoff_symfile_init (struct objfile *); |
| 189 | |
| 190 | static void xcoff_new_init (struct objfile *); |
| 191 | |
| 192 | static void xcoff_symfile_finish (struct objfile *); |
| 193 | |
| 194 | static void xcoff_symfile_offsets (struct objfile *, |
| 195 | struct section_addr_info *addrs); |
| 196 | |
| 197 | static char *coff_getfilename (union internal_auxent *, struct objfile *); |
| 198 | |
| 199 | static void read_symbol (struct internal_syment *, int); |
| 200 | |
| 201 | static int read_symbol_lineno (int); |
| 202 | |
| 203 | static CORE_ADDR read_symbol_nvalue (int); |
| 204 | |
| 205 | static struct symbol *process_xcoff_symbol (struct coff_symbol *, |
| 206 | struct objfile *); |
| 207 | |
| 208 | static void read_xcoff_symtab (struct partial_symtab *); |
| 209 | |
| 210 | #if 0 |
| 211 | static void add_stab_to_list (char *, struct pending_stabs **); |
| 212 | #endif |
| 213 | |
| 214 | static int compare_lte (const void *, const void *); |
| 215 | |
| 216 | static struct linetable *arrange_linetable (struct linetable *); |
| 217 | |
| 218 | static void record_include_end (struct coff_symbol *); |
| 219 | |
| 220 | static void process_linenos (CORE_ADDR, CORE_ADDR); |
| 221 | \f |
| 222 | |
| 223 | /* Translate from a COFF section number (target_index) to a SECT_OFF_* |
| 224 | code. */ |
| 225 | static int secnum_to_section (int, struct objfile *); |
| 226 | static asection *secnum_to_bfd_section (int, struct objfile *); |
| 227 | |
| 228 | struct find_targ_sec_arg |
| 229 | { |
| 230 | int targ_index; |
| 231 | int *resultp; |
| 232 | asection **bfd_sect; |
| 233 | struct objfile *objfile; |
| 234 | }; |
| 235 | |
| 236 | static void find_targ_sec (bfd *, asection *, void *); |
| 237 | |
| 238 | static void |
| 239 | find_targ_sec (bfd *abfd, asection *sect, void *obj) |
| 240 | { |
| 241 | struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj; |
| 242 | struct objfile *objfile = args->objfile; |
| 243 | |
| 244 | if (sect->target_index == args->targ_index) |
| 245 | { |
| 246 | /* This is the section. Figure out what SECT_OFF_* code it is. */ |
| 247 | if (bfd_get_section_flags (abfd, sect) & SEC_CODE) |
| 248 | *args->resultp = SECT_OFF_TEXT (objfile); |
| 249 | else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD) |
| 250 | *args->resultp = SECT_OFF_DATA (objfile); |
| 251 | else |
| 252 | *args->resultp = sect->index; |
| 253 | *args->bfd_sect = sect; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | /* Return the section number (SECT_OFF_*) that CS points to. */ |
| 258 | static int |
| 259 | secnum_to_section (int secnum, struct objfile *objfile) |
| 260 | { |
| 261 | int off = SECT_OFF_TEXT (objfile); |
| 262 | |
| 263 | asection *sect = NULL; |
| 264 | struct find_targ_sec_arg args; |
| 265 | args.targ_index = secnum; |
| 266 | args.resultp = &off; |
| 267 | args.bfd_sect = § |
| 268 | args.objfile = objfile; |
| 269 | bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); |
| 270 | return off; |
| 271 | } |
| 272 | |
| 273 | /* Return the BFD section that CS points to. */ |
| 274 | static asection * |
| 275 | secnum_to_bfd_section (int secnum, struct objfile *objfile) |
| 276 | { |
| 277 | int off = SECT_OFF_TEXT (objfile); |
| 278 | |
| 279 | asection *sect = NULL; |
| 280 | struct find_targ_sec_arg args; |
| 281 | args.targ_index = secnum; |
| 282 | args.resultp = &off; |
| 283 | args.bfd_sect = § |
| 284 | args.objfile = objfile; |
| 285 | bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); |
| 286 | return sect; |
| 287 | } |
| 288 | \f |
| 289 | /* add a given stab string into given stab vector. */ |
| 290 | |
| 291 | #if 0 |
| 292 | |
| 293 | static void |
| 294 | add_stab_to_list (char *stabname, struct pending_stabs **stabvector) |
| 295 | { |
| 296 | if (*stabvector == NULL) |
| 297 | { |
| 298 | *stabvector = (struct pending_stabs *) |
| 299 | xmalloc (sizeof (struct pending_stabs) + |
| 300 | INITIAL_STABVECTOR_LENGTH * sizeof (char *)); |
| 301 | (*stabvector)->count = 0; |
| 302 | (*stabvector)->length = INITIAL_STABVECTOR_LENGTH; |
| 303 | } |
| 304 | else if ((*stabvector)->count >= (*stabvector)->length) |
| 305 | { |
| 306 | (*stabvector)->length += INITIAL_STABVECTOR_LENGTH; |
| 307 | *stabvector = (struct pending_stabs *) |
| 308 | xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) + |
| 309 | (*stabvector)->length * sizeof (char *)); |
| 310 | } |
| 311 | (*stabvector)->stab[(*stabvector)->count++] = stabname; |
| 312 | } |
| 313 | |
| 314 | #endif |
| 315 | \f/* *INDENT-OFF* */ |
| 316 | /* Linenos are processed on a file-by-file basis. |
| 317 | |
| 318 | Two reasons: |
| 319 | |
| 320 | 1) xlc (IBM's native c compiler) postpones static function code |
| 321 | emission to the end of a compilation unit. This way it can |
| 322 | determine if those functions (statics) are needed or not, and |
| 323 | can do some garbage collection (I think). This makes line |
| 324 | numbers and corresponding addresses unordered, and we end up |
| 325 | with a line table like: |
| 326 | |
| 327 | |
| 328 | lineno addr |
| 329 | foo() 10 0x100 |
| 330 | 20 0x200 |
| 331 | 30 0x300 |
| 332 | |
| 333 | foo3() 70 0x400 |
| 334 | 80 0x500 |
| 335 | 90 0x600 |
| 336 | |
| 337 | static foo2() |
| 338 | 40 0x700 |
| 339 | 50 0x800 |
| 340 | 60 0x900 |
| 341 | |
| 342 | and that breaks gdb's binary search on line numbers, if the |
| 343 | above table is not sorted on line numbers. And that sort |
| 344 | should be on function based, since gcc can emit line numbers |
| 345 | like: |
| 346 | |
| 347 | 10 0x100 - for the init/test part of a for stmt. |
| 348 | 20 0x200 |
| 349 | 30 0x300 |
| 350 | 10 0x400 - for the increment part of a for stmt. |
| 351 | |
| 352 | arrange_linetable() will do this sorting. |
| 353 | |
| 354 | 2) aix symbol table might look like: |
| 355 | |
| 356 | c_file // beginning of a new file |
| 357 | .bi // beginning of include file |
| 358 | .ei // end of include file |
| 359 | .bi |
| 360 | .ei |
| 361 | |
| 362 | basically, .bi/.ei pairs do not necessarily encapsulate |
| 363 | their scope. They need to be recorded, and processed later |
| 364 | on when we come the end of the compilation unit. |
| 365 | Include table (inclTable) and process_linenos() handle |
| 366 | that. */ |
| 367 | /* *INDENT-ON* */ |
| 368 | |
| 369 | |
| 370 | |
| 371 | /* compare line table entry addresses. */ |
| 372 | |
| 373 | static int |
| 374 | compare_lte (const void *lte1p, const void *lte2p) |
| 375 | { |
| 376 | struct linetable_entry *lte1 = (struct linetable_entry *) lte1p; |
| 377 | struct linetable_entry *lte2 = (struct linetable_entry *) lte2p; |
| 378 | |
| 379 | return lte1->pc - lte2->pc; |
| 380 | } |
| 381 | |
| 382 | /* Given a line table with function entries are marked, arrange its functions |
| 383 | in ascending order and strip off function entry markers and return it in |
| 384 | a newly created table. If the old one is good enough, return the old one. */ |
| 385 | /* FIXME: I think all this stuff can be replaced by just passing |
| 386 | sort_linevec = 1 to end_symtab. */ |
| 387 | |
| 388 | static struct linetable * |
| 389 | arrange_linetable (struct linetable *oldLineTb) |
| 390 | { |
| 391 | int ii, jj, newline, /* new line count */ |
| 392 | function_count; /* # of functions */ |
| 393 | |
| 394 | struct linetable_entry *fentry; /* function entry vector */ |
| 395 | int fentry_size; /* # of function entries */ |
| 396 | struct linetable *newLineTb; /* new line table */ |
| 397 | |
| 398 | #define NUM_OF_FUNCTIONS 20 |
| 399 | |
| 400 | fentry_size = NUM_OF_FUNCTIONS; |
| 401 | fentry = (struct linetable_entry *) |
| 402 | xmalloc (fentry_size * sizeof (struct linetable_entry)); |
| 403 | |
| 404 | for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii) |
| 405 | { |
| 406 | if (oldLineTb->item[ii].line == 0) |
| 407 | { /* function entry found. */ |
| 408 | if (function_count >= fentry_size) |
| 409 | { /* make sure you have room. */ |
| 410 | fentry_size *= 2; |
| 411 | fentry = (struct linetable_entry *) |
| 412 | xrealloc (fentry, fentry_size * sizeof (struct linetable_entry)); |
| 413 | } |
| 414 | fentry[function_count].line = ii; |
| 415 | fentry[function_count].pc = oldLineTb->item[ii].pc; |
| 416 | ++function_count; |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | if (function_count == 0) |
| 421 | { |
| 422 | xfree (fentry); |
| 423 | return oldLineTb; |
| 424 | } |
| 425 | else if (function_count > 1) |
| 426 | qsort (fentry, function_count, sizeof (struct linetable_entry), compare_lte); |
| 427 | |
| 428 | /* allocate a new line table. */ |
| 429 | newLineTb = (struct linetable *) |
| 430 | xmalloc |
| 431 | (sizeof (struct linetable) + |
| 432 | (oldLineTb->nitems - function_count) * sizeof (struct linetable_entry)); |
| 433 | |
| 434 | /* if line table does not start with a function beginning, copy up until |
| 435 | a function begin. */ |
| 436 | |
| 437 | newline = 0; |
| 438 | if (oldLineTb->item[0].line != 0) |
| 439 | for (newline = 0; |
| 440 | newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline) |
| 441 | newLineTb->item[newline] = oldLineTb->item[newline]; |
| 442 | |
| 443 | /* Now copy function lines one by one. */ |
| 444 | |
| 445 | for (ii = 0; ii < function_count; ++ii) |
| 446 | { |
| 447 | for (jj = fentry[ii].line + 1; |
| 448 | jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0; |
| 449 | ++jj, ++newline) |
| 450 | newLineTb->item[newline] = oldLineTb->item[jj]; |
| 451 | } |
| 452 | xfree (fentry); |
| 453 | newLineTb->nitems = oldLineTb->nitems - function_count; |
| 454 | return newLineTb; |
| 455 | } |
| 456 | |
| 457 | /* include file support: C_BINCL/C_EINCL pairs will be kept in the |
| 458 | following `IncludeChain'. At the end of each symtab (end_symtab), |
| 459 | we will determine if we should create additional symtab's to |
| 460 | represent if (the include files. */ |
| 461 | |
| 462 | |
| 463 | typedef struct _inclTable |
| 464 | { |
| 465 | char *name; /* include filename */ |
| 466 | |
| 467 | /* Offsets to the line table. end points to the last entry which is |
| 468 | part of this include file. */ |
| 469 | int begin, end; |
| 470 | |
| 471 | struct subfile *subfile; |
| 472 | unsigned funStartLine; /* start line # of its function */ |
| 473 | } |
| 474 | InclTable; |
| 475 | |
| 476 | #define INITIAL_INCLUDE_TABLE_LENGTH 20 |
| 477 | static InclTable *inclTable; /* global include table */ |
| 478 | static int inclIndx; /* last entry to table */ |
| 479 | static int inclLength; /* table length */ |
| 480 | static int inclDepth; /* nested include depth */ |
| 481 | |
| 482 | static void allocate_include_entry (void); |
| 483 | |
| 484 | static void |
| 485 | record_include_begin (struct coff_symbol *cs) |
| 486 | { |
| 487 | if (inclDepth) |
| 488 | { |
| 489 | /* In xcoff, we assume include files cannot be nested (not in .c files |
| 490 | of course, but in corresponding .s files.). */ |
| 491 | |
| 492 | /* This can happen with old versions of GCC. |
| 493 | GCC 2.3.3-930426 does not exhibit this on a test case which |
| 494 | a user said produced the message for him. */ |
| 495 | complaint (&symfile_complaints, _("Nested C_BINCL symbols")); |
| 496 | } |
| 497 | ++inclDepth; |
| 498 | |
| 499 | allocate_include_entry (); |
| 500 | |
| 501 | inclTable[inclIndx].name = cs->c_name; |
| 502 | inclTable[inclIndx].begin = cs->c_value; |
| 503 | } |
| 504 | |
| 505 | static void |
| 506 | record_include_end (struct coff_symbol *cs) |
| 507 | { |
| 508 | InclTable *pTbl; |
| 509 | |
| 510 | if (inclDepth == 0) |
| 511 | { |
| 512 | complaint (&symfile_complaints, _("Mismatched C_BINCL/C_EINCL pair")); |
| 513 | } |
| 514 | |
| 515 | allocate_include_entry (); |
| 516 | |
| 517 | pTbl = &inclTable[inclIndx]; |
| 518 | pTbl->end = cs->c_value; |
| 519 | |
| 520 | --inclDepth; |
| 521 | ++inclIndx; |
| 522 | } |
| 523 | |
| 524 | static void |
| 525 | allocate_include_entry (void) |
| 526 | { |
| 527 | if (inclTable == NULL) |
| 528 | { |
| 529 | inclTable = (InclTable *) |
| 530 | xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); |
| 531 | memset (inclTable, |
| 532 | '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); |
| 533 | inclLength = INITIAL_INCLUDE_TABLE_LENGTH; |
| 534 | inclIndx = 0; |
| 535 | } |
| 536 | else if (inclIndx >= inclLength) |
| 537 | { |
| 538 | inclLength += INITIAL_INCLUDE_TABLE_LENGTH; |
| 539 | inclTable = (InclTable *) |
| 540 | xrealloc (inclTable, sizeof (InclTable) * inclLength); |
| 541 | memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH, |
| 542 | '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); |
| 543 | } |
| 544 | } |
| 545 | |
| 546 | /* Global variable to pass the psymtab down to all the routines involved |
| 547 | in psymtab to symtab processing. */ |
| 548 | static struct partial_symtab *this_symtab_psymtab; |
| 549 | |
| 550 | /* given the start and end addresses of a compilation unit (or a csect, |
| 551 | at times) process its lines and create appropriate line vectors. */ |
| 552 | |
| 553 | static void |
| 554 | process_linenos (CORE_ADDR start, CORE_ADDR end) |
| 555 | { |
| 556 | int offset, ii; |
| 557 | file_ptr max_offset = |
| 558 | ((struct coff_symfile_info *) this_symtab_psymtab->objfile |
| 559 | ->deprecated_sym_private)->max_lineno_offset; |
| 560 | |
| 561 | /* subfile structure for the main compilation unit. */ |
| 562 | struct subfile main_subfile; |
| 563 | |
| 564 | /* In the main source file, any time we see a function entry, we |
| 565 | reset this variable to function's absolute starting line number. |
| 566 | All the following line numbers in the function are relative to |
| 567 | this, and we record absolute line numbers in record_line(). */ |
| 568 | |
| 569 | unsigned int main_source_baseline = 0; |
| 570 | |
| 571 | unsigned *firstLine; |
| 572 | |
| 573 | offset = |
| 574 | ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off; |
| 575 | if (offset == 0) |
| 576 | goto return_after_cleanup; |
| 577 | |
| 578 | memset (&main_subfile, '\0', sizeof (main_subfile)); |
| 579 | |
| 580 | if (inclIndx == 0) |
| 581 | /* All source lines were in the main source file. None in include files. */ |
| 582 | |
| 583 | enter_line_range (&main_subfile, offset, 0, start, end, |
| 584 | &main_source_baseline); |
| 585 | |
| 586 | else |
| 587 | { |
| 588 | /* There was source with line numbers in include files. */ |
| 589 | |
| 590 | int linesz = |
| 591 | coff_data (this_symtab_psymtab->objfile->obfd)->local_linesz; |
| 592 | main_source_baseline = 0; |
| 593 | |
| 594 | for (ii = 0; ii < inclIndx; ++ii) |
| 595 | { |
| 596 | struct subfile *tmpSubfile; |
| 597 | |
| 598 | /* If there is main file source before include file, enter it. */ |
| 599 | if (offset < inclTable[ii].begin) |
| 600 | { |
| 601 | enter_line_range |
| 602 | (&main_subfile, offset, inclTable[ii].begin - linesz, |
| 603 | start, 0, &main_source_baseline); |
| 604 | } |
| 605 | |
| 606 | if (strcmp (inclTable[ii].name, last_source_file) == 0) |
| 607 | { |
| 608 | /* The entry in the include table refers to the main source |
| 609 | file. Add the lines to the main subfile. */ |
| 610 | |
| 611 | main_source_baseline = inclTable[ii].funStartLine; |
| 612 | enter_line_range |
| 613 | (&main_subfile, inclTable[ii].begin, inclTable[ii].end, |
| 614 | start, 0, &main_source_baseline); |
| 615 | inclTable[ii].subfile = &main_subfile; |
| 616 | } |
| 617 | else |
| 618 | { |
| 619 | /* Have a new subfile for the include file. */ |
| 620 | |
| 621 | tmpSubfile = inclTable[ii].subfile = |
| 622 | (struct subfile *) xmalloc (sizeof (struct subfile)); |
| 623 | |
| 624 | memset (tmpSubfile, '\0', sizeof (struct subfile)); |
| 625 | firstLine = &(inclTable[ii].funStartLine); |
| 626 | |
| 627 | /* Enter include file's lines now. */ |
| 628 | enter_line_range (tmpSubfile, inclTable[ii].begin, |
| 629 | inclTable[ii].end, start, 0, firstLine); |
| 630 | } |
| 631 | |
| 632 | if (offset <= inclTable[ii].end) |
| 633 | offset = inclTable[ii].end + linesz; |
| 634 | } |
| 635 | |
| 636 | /* All the include files' line have been processed at this point. Now, |
| 637 | enter remaining lines of the main file, if any left. */ |
| 638 | if (offset < max_offset + 1 - linesz) |
| 639 | { |
| 640 | enter_line_range (&main_subfile, offset, 0, start, end, |
| 641 | &main_source_baseline); |
| 642 | } |
| 643 | } |
| 644 | |
| 645 | /* Process main file's line numbers. */ |
| 646 | if (main_subfile.line_vector) |
| 647 | { |
| 648 | struct linetable *lineTb, *lv; |
| 649 | |
| 650 | lv = main_subfile.line_vector; |
| 651 | |
| 652 | /* Line numbers are not necessarily ordered. xlc compilation will |
| 653 | put static function to the end. */ |
| 654 | |
| 655 | lineTb = arrange_linetable (lv); |
| 656 | if (lv == lineTb) |
| 657 | { |
| 658 | current_subfile->line_vector = (struct linetable *) |
| 659 | xrealloc (lv, (sizeof (struct linetable) |
| 660 | + lv->nitems * sizeof (struct linetable_entry))); |
| 661 | } |
| 662 | else |
| 663 | { |
| 664 | xfree (lv); |
| 665 | current_subfile->line_vector = lineTb; |
| 666 | } |
| 667 | |
| 668 | current_subfile->line_vector_length = |
| 669 | current_subfile->line_vector->nitems; |
| 670 | } |
| 671 | |
| 672 | /* Now, process included files' line numbers. */ |
| 673 | |
| 674 | for (ii = 0; ii < inclIndx; ++ii) |
| 675 | { |
| 676 | if (inclTable[ii].subfile != ((struct subfile *) &main_subfile) |
| 677 | && (inclTable[ii].subfile)->line_vector) /* Useless if!!! FIXMEmgo */ |
| 678 | { |
| 679 | struct linetable *lineTb, *lv; |
| 680 | |
| 681 | lv = (inclTable[ii].subfile)->line_vector; |
| 682 | |
| 683 | /* Line numbers are not necessarily ordered. xlc compilation will |
| 684 | put static function to the end. */ |
| 685 | |
| 686 | lineTb = arrange_linetable (lv); |
| 687 | |
| 688 | push_subfile (); |
| 689 | |
| 690 | /* For the same include file, we might want to have more than one |
| 691 | subfile. This happens if we have something like: |
| 692 | |
| 693 | ...... |
| 694 | #include "foo.h" |
| 695 | ...... |
| 696 | #include "foo.h" |
| 697 | ...... |
| 698 | |
| 699 | while foo.h including code in it. (stupid but possible) |
| 700 | Since start_subfile() looks at the name and uses an |
| 701 | existing one if finds, we need to provide a fake name and |
| 702 | fool it. */ |
| 703 | |
| 704 | #if 0 |
| 705 | start_subfile (inclTable[ii].name, (char *) 0); |
| 706 | #else |
| 707 | { |
| 708 | /* Pick a fake name that will produce the same results as this |
| 709 | one when passed to deduce_language_from_filename. Kludge on |
| 710 | top of kludge. */ |
| 711 | char *fakename = strrchr (inclTable[ii].name, '.'); |
| 712 | |
| 713 | if (fakename == NULL) |
| 714 | fakename = " ?"; |
| 715 | start_subfile (fakename, (char *) 0); |
| 716 | xfree (current_subfile->name); |
| 717 | } |
| 718 | current_subfile->name = xstrdup (inclTable[ii].name); |
| 719 | #endif |
| 720 | |
| 721 | if (lv == lineTb) |
| 722 | { |
| 723 | current_subfile->line_vector = |
| 724 | (struct linetable *) xrealloc |
| 725 | (lv, (sizeof (struct linetable) |
| 726 | + lv->nitems * sizeof (struct linetable_entry))); |
| 727 | |
| 728 | } |
| 729 | else |
| 730 | { |
| 731 | xfree (lv); |
| 732 | current_subfile->line_vector = lineTb; |
| 733 | } |
| 734 | |
| 735 | current_subfile->line_vector_length = |
| 736 | current_subfile->line_vector->nitems; |
| 737 | start_subfile (pop_subfile (), (char *) 0); |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | return_after_cleanup: |
| 742 | |
| 743 | /* We don't want to keep alloc/free'ing the global include file table. */ |
| 744 | inclIndx = 0; |
| 745 | |
| 746 | /* Start with a fresh subfile structure for the next file. */ |
| 747 | memset (&main_subfile, '\0', sizeof (struct subfile)); |
| 748 | } |
| 749 | |
| 750 | static void |
| 751 | aix_process_linenos (void) |
| 752 | { |
| 753 | /* process line numbers and enter them into line vector */ |
| 754 | process_linenos (last_source_start_addr, cur_src_end_addr); |
| 755 | } |
| 756 | |
| 757 | |
| 758 | /* Enter a given range of lines into the line vector. |
| 759 | can be called in the following two ways: |
| 760 | enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or |
| 761 | enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine) |
| 762 | |
| 763 | endoffset points to the last line table entry that we should pay |
| 764 | attention to. */ |
| 765 | |
| 766 | static void |
| 767 | enter_line_range (struct subfile *subfile, unsigned beginoffset, unsigned endoffset, /* offsets to line table */ |
| 768 | CORE_ADDR startaddr, /* offsets to line table */ |
| 769 | CORE_ADDR endaddr, unsigned *firstLine) |
| 770 | { |
| 771 | struct objfile *objfile = this_symtab_psymtab->objfile; |
| 772 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 773 | unsigned int curoffset; |
| 774 | CORE_ADDR addr; |
| 775 | void *ext_lnno; |
| 776 | struct internal_lineno int_lnno; |
| 777 | unsigned int limit_offset; |
| 778 | bfd *abfd; |
| 779 | int linesz; |
| 780 | |
| 781 | if (endoffset == 0 && startaddr == 0 && endaddr == 0) |
| 782 | return; |
| 783 | curoffset = beginoffset; |
| 784 | limit_offset = |
| 785 | ((struct coff_symfile_info *) objfile->deprecated_sym_private) |
| 786 | ->max_lineno_offset; |
| 787 | |
| 788 | if (endoffset != 0) |
| 789 | { |
| 790 | if (endoffset >= limit_offset) |
| 791 | { |
| 792 | complaint (&symfile_complaints, |
| 793 | _("Bad line table offset in C_EINCL directive")); |
| 794 | return; |
| 795 | } |
| 796 | limit_offset = endoffset; |
| 797 | } |
| 798 | else |
| 799 | limit_offset -= 1; |
| 800 | |
| 801 | abfd = objfile->obfd; |
| 802 | linesz = coff_data (abfd)->local_linesz; |
| 803 | ext_lnno = alloca (linesz); |
| 804 | |
| 805 | while (curoffset <= limit_offset) |
| 806 | { |
| 807 | bfd_seek (abfd, curoffset, SEEK_SET); |
| 808 | bfd_bread (ext_lnno, linesz, abfd); |
| 809 | bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno); |
| 810 | |
| 811 | /* Find the address this line represents. */ |
| 812 | addr = (int_lnno.l_lnno |
| 813 | ? int_lnno.l_addr.l_paddr |
| 814 | : read_symbol_nvalue (int_lnno.l_addr.l_symndx)); |
| 815 | addr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 816 | |
| 817 | if (addr < startaddr || (endaddr && addr >= endaddr)) |
| 818 | return; |
| 819 | |
| 820 | if (int_lnno.l_lnno == 0) |
| 821 | { |
| 822 | *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx); |
| 823 | record_line (subfile, 0, gdbarch_addr_bits_remove (gdbarch, addr)); |
| 824 | --(*firstLine); |
| 825 | } |
| 826 | else |
| 827 | record_line (subfile, *firstLine + int_lnno.l_lnno, |
| 828 | gdbarch_addr_bits_remove (gdbarch, addr)); |
| 829 | curoffset += linesz; |
| 830 | } |
| 831 | } |
| 832 | |
| 833 | |
| 834 | /* Save the vital information for use when closing off the current file. |
| 835 | NAME is the file name the symbols came from, START_ADDR is the first |
| 836 | text address for the file, and SIZE is the number of bytes of text. */ |
| 837 | |
| 838 | #define complete_symtab(name, start_addr) { \ |
| 839 | last_source_file = xstrdup (name); \ |
| 840 | last_source_start_addr = start_addr; \ |
| 841 | } |
| 842 | |
| 843 | |
| 844 | /* Refill the symbol table input buffer |
| 845 | and set the variables that control fetching entries from it. |
| 846 | Reports an error if no data available. |
| 847 | This function can read past the end of the symbol table |
| 848 | (into the string table) but this does no harm. */ |
| 849 | |
| 850 | /* Reading symbol table has to be fast! Keep the followings as macros, rather |
| 851 | than functions. */ |
| 852 | |
| 853 | #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \ |
| 854 | { \ |
| 855 | char *namestr; \ |
| 856 | \ |
| 857 | namestr = (NAME); \ |
| 858 | if (namestr[0] == '.') ++namestr; \ |
| 859 | prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \ |
| 860 | (SECTION), (asection *)NULL, \ |
| 861 | (OBJFILE)); \ |
| 862 | misc_func_recorded = 1; \ |
| 863 | } |
| 864 | |
| 865 | |
| 866 | /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be |
| 867 | nested. At any given time, a symbol can only be in one static block. |
| 868 | This is the base address of current static block, zero if non exists. */ |
| 869 | |
| 870 | static int static_block_base = 0; |
| 871 | |
| 872 | /* Section number for the current static block. */ |
| 873 | |
| 874 | static int static_block_section = -1; |
| 875 | |
| 876 | /* true if space for symbol name has been allocated. */ |
| 877 | |
| 878 | static int symname_alloced = 0; |
| 879 | |
| 880 | /* Next symbol to read. Pointer into raw seething symbol table. */ |
| 881 | |
| 882 | static char *raw_symbol; |
| 883 | |
| 884 | /* This is the function which stabsread.c calls to get symbol |
| 885 | continuations. */ |
| 886 | |
| 887 | static char * |
| 888 | xcoff_next_symbol_text (struct objfile *objfile) |
| 889 | { |
| 890 | struct internal_syment symbol; |
| 891 | char *retval; |
| 892 | |
| 893 | /* FIXME: is this the same as the passed arg? */ |
| 894 | if (this_symtab_psymtab) |
| 895 | objfile = this_symtab_psymtab->objfile; |
| 896 | |
| 897 | bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol); |
| 898 | if (symbol.n_zeroes) |
| 899 | { |
| 900 | complaint (&symfile_complaints, _("Unexpected symbol continuation")); |
| 901 | |
| 902 | /* Return something which points to '\0' and hope the symbol reading |
| 903 | code does something reasonable. */ |
| 904 | retval = ""; |
| 905 | } |
| 906 | else if (symbol.n_sclass & 0x80) |
| 907 | { |
| 908 | retval = |
| 909 | ((struct coff_symfile_info *) objfile->deprecated_sym_private)->debugsec |
| 910 | + symbol.n_offset; |
| 911 | raw_symbol += |
| 912 | coff_data (objfile->obfd)->local_symesz; |
| 913 | ++symnum; |
| 914 | } |
| 915 | else |
| 916 | { |
| 917 | complaint (&symfile_complaints, _("Unexpected symbol continuation")); |
| 918 | |
| 919 | /* Return something which points to '\0' and hope the symbol reading |
| 920 | code does something reasonable. */ |
| 921 | retval = ""; |
| 922 | } |
| 923 | return retval; |
| 924 | } |
| 925 | |
| 926 | /* Read symbols for a given partial symbol table. */ |
| 927 | |
| 928 | static void |
| 929 | read_xcoff_symtab (struct partial_symtab *pst) |
| 930 | { |
| 931 | struct objfile *objfile = pst->objfile; |
| 932 | bfd *abfd = objfile->obfd; |
| 933 | char *raw_auxptr; /* Pointer to first raw aux entry for sym */ |
| 934 | char *strtbl = |
| 935 | ((struct coff_symfile_info *) objfile->deprecated_sym_private)->strtbl; |
| 936 | char *debugsec = |
| 937 | ((struct coff_symfile_info *) objfile->deprecated_sym_private)->debugsec; |
| 938 | char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF"; |
| 939 | |
| 940 | struct internal_syment symbol[1]; |
| 941 | union internal_auxent main_aux; |
| 942 | struct coff_symbol cs[1]; |
| 943 | CORE_ADDR file_start_addr = 0; |
| 944 | CORE_ADDR file_end_addr = 0; |
| 945 | |
| 946 | int next_file_symnum = -1; |
| 947 | unsigned int max_symnum; |
| 948 | int just_started = 1; |
| 949 | int depth = 0; |
| 950 | int fcn_start_addr = 0; |
| 951 | |
| 952 | struct coff_symbol fcn_stab_saved = { 0 }; |
| 953 | |
| 954 | /* fcn_cs_saved is global because process_xcoff_symbol needs it. */ |
| 955 | union internal_auxent fcn_aux_saved; |
| 956 | struct context_stack *new; |
| 957 | |
| 958 | char *filestring = " _start_ "; /* Name of the current file. */ |
| 959 | |
| 960 | char *last_csect_name; /* last seen csect's name and value */ |
| 961 | CORE_ADDR last_csect_val; |
| 962 | int last_csect_sec; |
| 963 | |
| 964 | this_symtab_psymtab = pst; |
| 965 | |
| 966 | /* Get the appropriate COFF "constants" related to the file we're |
| 967 | handling. */ |
| 968 | local_symesz = coff_data (abfd)->local_symesz; |
| 969 | |
| 970 | last_source_file = NULL; |
| 971 | last_csect_name = 0; |
| 972 | last_csect_val = 0; |
| 973 | |
| 974 | start_stabs (); |
| 975 | start_symtab (filestring, (char *) NULL, file_start_addr); |
| 976 | record_debugformat (debugfmt); |
| 977 | symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum; |
| 978 | max_symnum = |
| 979 | symnum + ((struct symloc *) pst->read_symtab_private)->numsyms; |
| 980 | first_object_file_end = 0; |
| 981 | |
| 982 | raw_symbol = |
| 983 | ((struct coff_symfile_info *) objfile->deprecated_sym_private)->symtbl |
| 984 | + symnum * local_symesz; |
| 985 | |
| 986 | while (symnum < max_symnum) |
| 987 | { |
| 988 | QUIT; /* make this command interruptable. */ |
| 989 | |
| 990 | /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */ |
| 991 | /* read one symbol into `cs' structure. After processing the |
| 992 | whole symbol table, only string table will be kept in memory, |
| 993 | symbol table and debug section of xcoff will be freed. Thus |
| 994 | we can mark symbols with names in string table as |
| 995 | `alloced'. */ |
| 996 | { |
| 997 | int ii; |
| 998 | |
| 999 | /* Swap and align the symbol into a reasonable C structure. */ |
| 1000 | bfd_coff_swap_sym_in (abfd, raw_symbol, symbol); |
| 1001 | |
| 1002 | cs->c_symnum = symnum; |
| 1003 | cs->c_naux = symbol->n_numaux; |
| 1004 | if (symbol->n_zeroes) |
| 1005 | { |
| 1006 | symname_alloced = 0; |
| 1007 | /* We must use the original, unswapped, name here so the name field |
| 1008 | pointed to by cs->c_name will persist throughout xcoffread. If |
| 1009 | we use the new field, it gets overwritten for each symbol. */ |
| 1010 | cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name; |
| 1011 | /* If it's exactly E_SYMNMLEN characters long it isn't |
| 1012 | '\0'-terminated. */ |
| 1013 | if (cs->c_name[E_SYMNMLEN - 1] != '\0') |
| 1014 | { |
| 1015 | char *p; |
| 1016 | |
| 1017 | p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1); |
| 1018 | strncpy (p, cs->c_name, E_SYMNMLEN); |
| 1019 | p[E_SYMNMLEN] = '\0'; |
| 1020 | cs->c_name = p; |
| 1021 | symname_alloced = 1; |
| 1022 | } |
| 1023 | } |
| 1024 | else if (symbol->n_sclass & 0x80) |
| 1025 | { |
| 1026 | cs->c_name = debugsec + symbol->n_offset; |
| 1027 | symname_alloced = 0; |
| 1028 | } |
| 1029 | else |
| 1030 | { |
| 1031 | /* in string table */ |
| 1032 | cs->c_name = strtbl + (int) symbol->n_offset; |
| 1033 | symname_alloced = 1; |
| 1034 | } |
| 1035 | cs->c_value = symbol->n_value; |
| 1036 | cs->c_sclass = symbol->n_sclass; |
| 1037 | cs->c_secnum = symbol->n_scnum; |
| 1038 | cs->c_type = (unsigned) symbol->n_type; |
| 1039 | |
| 1040 | raw_symbol += local_symesz; |
| 1041 | ++symnum; |
| 1042 | |
| 1043 | /* Save addr of first aux entry. */ |
| 1044 | raw_auxptr = raw_symbol; |
| 1045 | |
| 1046 | /* Skip all the auxents associated with this symbol. */ |
| 1047 | for (ii = symbol->n_numaux; ii; --ii) |
| 1048 | { |
| 1049 | raw_symbol += coff_data (abfd)->local_auxesz; |
| 1050 | ++symnum; |
| 1051 | } |
| 1052 | } |
| 1053 | |
| 1054 | /* if symbol name starts with ".$" or "$", ignore it. */ |
| 1055 | if (cs->c_name[0] == '$' |
| 1056 | || (cs->c_name[1] == '$' && cs->c_name[0] == '.')) |
| 1057 | continue; |
| 1058 | |
| 1059 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) |
| 1060 | { |
| 1061 | if (last_source_file) |
| 1062 | { |
| 1063 | pst->symtab = |
| 1064 | end_symtab (cur_src_end_addr, objfile, SECT_OFF_TEXT (objfile)); |
| 1065 | end_stabs (); |
| 1066 | } |
| 1067 | |
| 1068 | start_stabs (); |
| 1069 | start_symtab ("_globals_", (char *) NULL, (CORE_ADDR) 0); |
| 1070 | record_debugformat (debugfmt); |
| 1071 | cur_src_end_addr = first_object_file_end; |
| 1072 | /* done with all files, everything from here on is globals */ |
| 1073 | } |
| 1074 | |
| 1075 | if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT) |
| 1076 | && cs->c_naux == 1) |
| 1077 | { |
| 1078 | /* Dealing with a symbol with a csect entry. */ |
| 1079 | |
| 1080 | #define CSECT(PP) ((PP)->x_csect) |
| 1081 | #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l) |
| 1082 | #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp)) |
| 1083 | #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp)) |
| 1084 | #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas) |
| 1085 | |
| 1086 | /* Convert the auxent to something we can access. */ |
| 1087 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1088 | 0, cs->c_naux, &main_aux); |
| 1089 | |
| 1090 | switch (CSECT_SMTYP (&main_aux)) |
| 1091 | { |
| 1092 | |
| 1093 | case XTY_ER: |
| 1094 | /* Ignore all external references. */ |
| 1095 | continue; |
| 1096 | |
| 1097 | case XTY_SD: |
| 1098 | /* A section description. */ |
| 1099 | { |
| 1100 | switch (CSECT_SCLAS (&main_aux)) |
| 1101 | { |
| 1102 | |
| 1103 | case XMC_PR: |
| 1104 | { |
| 1105 | |
| 1106 | /* A program csect is seen. We have to allocate one |
| 1107 | symbol table for each program csect. Normally gdb |
| 1108 | prefers one symtab for each source file. In case |
| 1109 | of AIX, one source file might include more than one |
| 1110 | [PR] csect, and they don't have to be adjacent in |
| 1111 | terms of the space they occupy in memory. Thus, one |
| 1112 | single source file might get fragmented in the |
| 1113 | memory and gdb's file start and end address |
| 1114 | approach does not work! GCC (and I think xlc) seem |
| 1115 | to put all the code in the unnamed program csect. */ |
| 1116 | |
| 1117 | if (last_csect_name) |
| 1118 | { |
| 1119 | complete_symtab (filestring, file_start_addr); |
| 1120 | cur_src_end_addr = file_end_addr; |
| 1121 | end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile)); |
| 1122 | end_stabs (); |
| 1123 | start_stabs (); |
| 1124 | /* Give all csects for this source file the same |
| 1125 | name. */ |
| 1126 | start_symtab (filestring, NULL, (CORE_ADDR) 0); |
| 1127 | record_debugformat (debugfmt); |
| 1128 | } |
| 1129 | |
| 1130 | /* If this is the very first csect seen, |
| 1131 | basically `__start'. */ |
| 1132 | if (just_started) |
| 1133 | { |
| 1134 | first_object_file_end |
| 1135 | = cs->c_value + CSECT_LEN (&main_aux); |
| 1136 | just_started = 0; |
| 1137 | } |
| 1138 | |
| 1139 | file_start_addr = |
| 1140 | cs->c_value + ANOFFSET (objfile->section_offsets, |
| 1141 | SECT_OFF_TEXT (objfile)); |
| 1142 | file_end_addr = file_start_addr + CSECT_LEN (&main_aux); |
| 1143 | |
| 1144 | if (cs->c_name && (cs->c_name[0] == '.' |
| 1145 | || cs->c_name[0] == '@')) |
| 1146 | { |
| 1147 | last_csect_name = cs->c_name; |
| 1148 | last_csect_val = cs->c_value; |
| 1149 | last_csect_sec = secnum_to_section (cs->c_secnum, objfile); |
| 1150 | } |
| 1151 | } |
| 1152 | continue; |
| 1153 | |
| 1154 | /* All other symbols are put into the minimal symbol |
| 1155 | table only. */ |
| 1156 | |
| 1157 | case XMC_RW: |
| 1158 | continue; |
| 1159 | |
| 1160 | case XMC_TC0: |
| 1161 | continue; |
| 1162 | |
| 1163 | case XMC_TC: |
| 1164 | continue; |
| 1165 | |
| 1166 | default: |
| 1167 | /* Ignore the symbol. */ |
| 1168 | continue; |
| 1169 | } |
| 1170 | } |
| 1171 | break; |
| 1172 | |
| 1173 | case XTY_LD: |
| 1174 | |
| 1175 | switch (CSECT_SCLAS (&main_aux)) |
| 1176 | { |
| 1177 | case XMC_PR: |
| 1178 | /* a function entry point. */ |
| 1179 | function_entry_point: |
| 1180 | |
| 1181 | fcn_start_addr = cs->c_value; |
| 1182 | |
| 1183 | /* save the function header info, which will be used |
| 1184 | when `.bf' is seen. */ |
| 1185 | fcn_cs_saved = *cs; |
| 1186 | fcn_aux_saved = main_aux; |
| 1187 | continue; |
| 1188 | |
| 1189 | case XMC_GL: |
| 1190 | /* shared library function trampoline code entry point. */ |
| 1191 | continue; |
| 1192 | |
| 1193 | case XMC_DS: |
| 1194 | /* The symbols often have the same names as debug symbols for |
| 1195 | functions, and confuse lookup_symbol. */ |
| 1196 | continue; |
| 1197 | |
| 1198 | default: |
| 1199 | /* xlc puts each variable in a separate csect, so we get |
| 1200 | an XTY_SD for each variable. But gcc puts several |
| 1201 | variables in a csect, so that each variable only gets |
| 1202 | an XTY_LD. This will typically be XMC_RW; I suspect |
| 1203 | XMC_RO and XMC_BS might be possible too. |
| 1204 | These variables are put in the minimal symbol table |
| 1205 | only. */ |
| 1206 | continue; |
| 1207 | } |
| 1208 | break; |
| 1209 | |
| 1210 | case XTY_CM: |
| 1211 | /* Common symbols are put into the minimal symbol table only. */ |
| 1212 | continue; |
| 1213 | |
| 1214 | default: |
| 1215 | break; |
| 1216 | } |
| 1217 | } |
| 1218 | |
| 1219 | /* If explicitly specified as a function, treat is as one. This check |
| 1220 | evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur |
| 1221 | after the above CSECT check. */ |
| 1222 | if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) |
| 1223 | { |
| 1224 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1225 | 0, cs->c_naux, &main_aux); |
| 1226 | goto function_entry_point; |
| 1227 | } |
| 1228 | |
| 1229 | switch (cs->c_sclass) |
| 1230 | { |
| 1231 | case C_FILE: |
| 1232 | |
| 1233 | /* c_value field contains symnum of next .file entry in table |
| 1234 | or symnum of first global after last .file. */ |
| 1235 | |
| 1236 | next_file_symnum = cs->c_value; |
| 1237 | |
| 1238 | /* Complete symbol table for last object file containing |
| 1239 | debugging information. */ |
| 1240 | |
| 1241 | /* Whether or not there was a csect in the previous file, we |
| 1242 | have to call `end_stabs' and `start_stabs' to reset |
| 1243 | type_vector, line_vector, etc. structures. */ |
| 1244 | |
| 1245 | complete_symtab (filestring, file_start_addr); |
| 1246 | cur_src_end_addr = file_end_addr; |
| 1247 | end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile)); |
| 1248 | end_stabs (); |
| 1249 | |
| 1250 | /* XCOFF, according to the AIX 3.2 documentation, puts the filename |
| 1251 | in cs->c_name. But xlc 1.3.0.2 has decided to do things the |
| 1252 | standard COFF way and put it in the auxent. We use the auxent if |
| 1253 | the symbol is ".file" and an auxent exists, otherwise use the symbol |
| 1254 | itself. Simple enough. */ |
| 1255 | if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0) |
| 1256 | { |
| 1257 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1258 | 0, cs->c_naux, &main_aux); |
| 1259 | filestring = coff_getfilename (&main_aux, objfile); |
| 1260 | } |
| 1261 | else |
| 1262 | filestring = cs->c_name; |
| 1263 | |
| 1264 | start_stabs (); |
| 1265 | start_symtab (filestring, (char *) NULL, (CORE_ADDR) 0); |
| 1266 | record_debugformat (debugfmt); |
| 1267 | last_csect_name = 0; |
| 1268 | |
| 1269 | /* reset file start and end addresses. A compilation unit with no text |
| 1270 | (only data) should have zero file boundaries. */ |
| 1271 | file_start_addr = file_end_addr = 0; |
| 1272 | break; |
| 1273 | |
| 1274 | case C_FUN: |
| 1275 | fcn_stab_saved = *cs; |
| 1276 | break; |
| 1277 | |
| 1278 | case C_FCN: |
| 1279 | if (strcmp (cs->c_name, ".bf") == 0) |
| 1280 | { |
| 1281 | CORE_ADDR off = ANOFFSET (objfile->section_offsets, |
| 1282 | SECT_OFF_TEXT (objfile)); |
| 1283 | |
| 1284 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1285 | 0, cs->c_naux, &main_aux); |
| 1286 | |
| 1287 | within_function = 1; |
| 1288 | |
| 1289 | new = push_context (0, fcn_start_addr + off); |
| 1290 | |
| 1291 | new->name = define_symbol |
| 1292 | (fcn_cs_saved.c_value + off, |
| 1293 | fcn_stab_saved.c_name, 0, 0, objfile); |
| 1294 | if (new->name != NULL) |
| 1295 | SYMBOL_SECTION (new->name) = SECT_OFF_TEXT (objfile); |
| 1296 | } |
| 1297 | else if (strcmp (cs->c_name, ".ef") == 0) |
| 1298 | { |
| 1299 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1300 | 0, cs->c_naux, &main_aux); |
| 1301 | |
| 1302 | /* The value of .ef is the address of epilogue code; |
| 1303 | not useful for gdb. */ |
| 1304 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno |
| 1305 | contains number of lines to '}' */ |
| 1306 | |
| 1307 | if (context_stack_depth <= 0) |
| 1308 | { /* We attempted to pop an empty context stack */ |
| 1309 | ef_complaint (cs->c_symnum); |
| 1310 | within_function = 0; |
| 1311 | break; |
| 1312 | } |
| 1313 | new = pop_context (); |
| 1314 | /* Stack must be empty now. */ |
| 1315 | if (context_stack_depth > 0 || new == NULL) |
| 1316 | { |
| 1317 | ef_complaint (cs->c_symnum); |
| 1318 | within_function = 0; |
| 1319 | break; |
| 1320 | } |
| 1321 | |
| 1322 | finish_block (new->name, &local_symbols, new->old_blocks, |
| 1323 | new->start_addr, |
| 1324 | (fcn_cs_saved.c_value |
| 1325 | + fcn_aux_saved.x_sym.x_misc.x_fsize |
| 1326 | + ANOFFSET (objfile->section_offsets, |
| 1327 | SECT_OFF_TEXT (objfile))), |
| 1328 | objfile); |
| 1329 | within_function = 0; |
| 1330 | } |
| 1331 | break; |
| 1332 | |
| 1333 | case C_BSTAT: |
| 1334 | /* Begin static block. */ |
| 1335 | { |
| 1336 | struct internal_syment symbol; |
| 1337 | |
| 1338 | read_symbol (&symbol, cs->c_value); |
| 1339 | static_block_base = symbol.n_value; |
| 1340 | static_block_section = |
| 1341 | secnum_to_section (symbol.n_scnum, objfile); |
| 1342 | } |
| 1343 | break; |
| 1344 | |
| 1345 | case C_ESTAT: |
| 1346 | /* End of static block. */ |
| 1347 | static_block_base = 0; |
| 1348 | static_block_section = -1; |
| 1349 | break; |
| 1350 | |
| 1351 | case C_ARG: |
| 1352 | case C_REGPARM: |
| 1353 | case C_REG: |
| 1354 | case C_TPDEF: |
| 1355 | case C_STRTAG: |
| 1356 | case C_UNTAG: |
| 1357 | case C_ENTAG: |
| 1358 | { |
| 1359 | complaint (&symfile_complaints, _("Unrecognized storage class %d."), |
| 1360 | cs->c_sclass); |
| 1361 | } |
| 1362 | break; |
| 1363 | |
| 1364 | case C_LABEL: |
| 1365 | case C_NULL: |
| 1366 | /* Ignore these. */ |
| 1367 | break; |
| 1368 | |
| 1369 | case C_HIDEXT: |
| 1370 | case C_STAT: |
| 1371 | break; |
| 1372 | |
| 1373 | case C_BINCL: |
| 1374 | /* beginning of include file */ |
| 1375 | /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted |
| 1376 | order. Thus, when wee see them, we might not know enough info |
| 1377 | to process them. Thus, we'll be saving them into a table |
| 1378 | (inclTable) and postpone their processing. */ |
| 1379 | |
| 1380 | record_include_begin (cs); |
| 1381 | break; |
| 1382 | |
| 1383 | case C_EINCL: |
| 1384 | /* End of include file. */ |
| 1385 | /* See the comment after case C_BINCL. */ |
| 1386 | record_include_end (cs); |
| 1387 | break; |
| 1388 | |
| 1389 | case C_BLOCK: |
| 1390 | if (strcmp (cs->c_name, ".bb") == 0) |
| 1391 | { |
| 1392 | depth++; |
| 1393 | new = push_context (depth, |
| 1394 | (cs->c_value |
| 1395 | + ANOFFSET (objfile->section_offsets, |
| 1396 | SECT_OFF_TEXT (objfile)))); |
| 1397 | } |
| 1398 | else if (strcmp (cs->c_name, ".eb") == 0) |
| 1399 | { |
| 1400 | if (context_stack_depth <= 0) |
| 1401 | { /* We attempted to pop an empty context stack */ |
| 1402 | eb_complaint (cs->c_symnum); |
| 1403 | break; |
| 1404 | } |
| 1405 | new = pop_context (); |
| 1406 | if (depth-- != new->depth) |
| 1407 | { |
| 1408 | eb_complaint (cs->c_symnum); |
| 1409 | break; |
| 1410 | } |
| 1411 | if (local_symbols && context_stack_depth > 0) |
| 1412 | { |
| 1413 | /* Make a block for the local symbols within. */ |
| 1414 | finish_block (new->name, &local_symbols, new->old_blocks, |
| 1415 | new->start_addr, |
| 1416 | (cs->c_value |
| 1417 | + ANOFFSET (objfile->section_offsets, |
| 1418 | SECT_OFF_TEXT (objfile))), |
| 1419 | objfile); |
| 1420 | } |
| 1421 | local_symbols = new->locals; |
| 1422 | } |
| 1423 | break; |
| 1424 | |
| 1425 | default: |
| 1426 | process_xcoff_symbol (cs, objfile); |
| 1427 | break; |
| 1428 | } |
| 1429 | } |
| 1430 | |
| 1431 | if (last_source_file) |
| 1432 | { |
| 1433 | struct symtab *s; |
| 1434 | |
| 1435 | complete_symtab (filestring, file_start_addr); |
| 1436 | cur_src_end_addr = file_end_addr; |
| 1437 | s = end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile)); |
| 1438 | /* When reading symbols for the last C_FILE of the objfile, try |
| 1439 | to make sure that we set pst->symtab to the symtab for the |
| 1440 | file, not to the _globals_ symtab. I'm not sure whether this |
| 1441 | actually works right or when/if it comes up. */ |
| 1442 | if (pst->symtab == NULL) |
| 1443 | pst->symtab = s; |
| 1444 | end_stabs (); |
| 1445 | } |
| 1446 | } |
| 1447 | |
| 1448 | #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \ |
| 1449 | (SYMBOL2) = (struct symbol *) \ |
| 1450 | obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \ |
| 1451 | *(SYMBOL2) = *(SYMBOL1); |
| 1452 | |
| 1453 | |
| 1454 | #define SYMNAME_ALLOC(NAME, ALLOCED) \ |
| 1455 | ((ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), &objfile->objfile_obstack)) |
| 1456 | |
| 1457 | |
| 1458 | /* process one xcoff symbol. */ |
| 1459 | |
| 1460 | static struct symbol * |
| 1461 | process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile) |
| 1462 | { |
| 1463 | struct symbol onesymbol; |
| 1464 | struct symbol *sym = &onesymbol; |
| 1465 | struct symbol *sym2 = NULL; |
| 1466 | char *name, *pp; |
| 1467 | |
| 1468 | int sec; |
| 1469 | CORE_ADDR off; |
| 1470 | |
| 1471 | if (cs->c_secnum < 0) |
| 1472 | { |
| 1473 | /* The value is a register number, offset within a frame, etc., |
| 1474 | and does not get relocated. */ |
| 1475 | off = 0; |
| 1476 | sec = -1; |
| 1477 | } |
| 1478 | else |
| 1479 | { |
| 1480 | sec = secnum_to_section (cs->c_secnum, objfile); |
| 1481 | off = ANOFFSET (objfile->section_offsets, sec); |
| 1482 | } |
| 1483 | |
| 1484 | name = cs->c_name; |
| 1485 | if (name[0] == '.') |
| 1486 | ++name; |
| 1487 | |
| 1488 | memset (sym, '\0', sizeof (struct symbol)); |
| 1489 | |
| 1490 | /* default assumptions */ |
| 1491 | SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off; |
| 1492 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 1493 | SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile); |
| 1494 | |
| 1495 | if (ISFCN (cs->c_type)) |
| 1496 | { |
| 1497 | /* At this point, we don't know the type of the function. This |
| 1498 | will be patched with the type from its stab entry later on in |
| 1499 | patch_block_stabs (), unless the file was compiled without -g. */ |
| 1500 | |
| 1501 | SYMBOL_SET_LINKAGE_NAME (sym, SYMNAME_ALLOC (name, symname_alloced)); |
| 1502 | SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_text_symbol; |
| 1503 | |
| 1504 | SYMBOL_CLASS (sym) = LOC_BLOCK; |
| 1505 | SYMBOL_DUP (sym, sym2); |
| 1506 | |
| 1507 | if (cs->c_sclass == C_EXT) |
| 1508 | add_symbol_to_list (sym2, &global_symbols); |
| 1509 | else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT) |
| 1510 | add_symbol_to_list (sym2, &file_symbols); |
| 1511 | } |
| 1512 | else |
| 1513 | { |
| 1514 | /* In case we can't figure out the type, provide default. */ |
| 1515 | SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_data_symbol; |
| 1516 | |
| 1517 | switch (cs->c_sclass) |
| 1518 | { |
| 1519 | #if 0 |
| 1520 | /* The values of functions and global symbols are now resolved |
| 1521 | via the global_sym_chain in stabsread.c. */ |
| 1522 | case C_FUN: |
| 1523 | if (fcn_cs_saved.c_sclass == C_EXT) |
| 1524 | add_stab_to_list (name, &global_stabs); |
| 1525 | else |
| 1526 | add_stab_to_list (name, &file_stabs); |
| 1527 | break; |
| 1528 | |
| 1529 | case C_GSYM: |
| 1530 | add_stab_to_list (name, &global_stabs); |
| 1531 | break; |
| 1532 | #endif |
| 1533 | |
| 1534 | case C_BCOMM: |
| 1535 | common_block_start (cs->c_name, objfile); |
| 1536 | break; |
| 1537 | |
| 1538 | case C_ECOMM: |
| 1539 | common_block_end (objfile); |
| 1540 | break; |
| 1541 | |
| 1542 | default: |
| 1543 | complaint (&symfile_complaints, _("Unexpected storage class: %d"), |
| 1544 | cs->c_sclass); |
| 1545 | /* FALLTHROUGH */ |
| 1546 | |
| 1547 | case C_DECL: |
| 1548 | case C_PSYM: |
| 1549 | case C_RPSYM: |
| 1550 | case C_ECOML: |
| 1551 | case C_LSYM: |
| 1552 | case C_RSYM: |
| 1553 | case C_GSYM: |
| 1554 | |
| 1555 | { |
| 1556 | sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile); |
| 1557 | if (sym != NULL) |
| 1558 | { |
| 1559 | SYMBOL_SECTION (sym) = sec; |
| 1560 | } |
| 1561 | return sym; |
| 1562 | } |
| 1563 | |
| 1564 | case C_STSYM: |
| 1565 | |
| 1566 | /* For xlc (not GCC), the 'V' symbol descriptor is used for |
| 1567 | all statics and we need to distinguish file-scope versus |
| 1568 | function-scope using within_function. We do this by |
| 1569 | changing the string we pass to define_symbol to use 'S' |
| 1570 | where we need to, which is not necessarily super-clean, |
| 1571 | but seems workable enough. */ |
| 1572 | |
| 1573 | if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL) |
| 1574 | return NULL; |
| 1575 | |
| 1576 | ++pp; |
| 1577 | if (*pp == 'V' && !within_function) |
| 1578 | *pp = 'S'; |
| 1579 | sym = define_symbol ((cs->c_value |
| 1580 | + ANOFFSET (objfile->section_offsets, |
| 1581 | static_block_section)), |
| 1582 | cs->c_name, 0, 0, objfile); |
| 1583 | if (sym != NULL) |
| 1584 | { |
| 1585 | SYMBOL_VALUE_ADDRESS (sym) += static_block_base; |
| 1586 | SYMBOL_SECTION (sym) = static_block_section; |
| 1587 | } |
| 1588 | return sym; |
| 1589 | |
| 1590 | } |
| 1591 | } |
| 1592 | return sym2; |
| 1593 | } |
| 1594 | |
| 1595 | /* Extract the file name from the aux entry of a C_FILE symbol. |
| 1596 | Result is in static storage and is only good for temporary use. */ |
| 1597 | |
| 1598 | static char * |
| 1599 | coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile) |
| 1600 | { |
| 1601 | static char buffer[BUFSIZ]; |
| 1602 | |
| 1603 | if (aux_entry->x_file.x_n.x_zeroes == 0) |
| 1604 | strcpy (buffer, |
| 1605 | ((struct coff_symfile_info *) objfile->deprecated_sym_private)->strtbl |
| 1606 | + aux_entry->x_file.x_n.x_offset); |
| 1607 | else |
| 1608 | { |
| 1609 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); |
| 1610 | buffer[FILNMLEN] = '\0'; |
| 1611 | } |
| 1612 | return (buffer); |
| 1613 | } |
| 1614 | |
| 1615 | /* Set *SYMBOL to symbol number symno in symtbl. */ |
| 1616 | static void |
| 1617 | read_symbol (struct internal_syment *symbol, int symno) |
| 1618 | { |
| 1619 | int nsyms = |
| 1620 | ((struct coff_symfile_info *) this_symtab_psymtab->objfile->deprecated_sym_private)->symtbl_num_syms; |
| 1621 | char *stbl = |
| 1622 | ((struct coff_symfile_info *) this_symtab_psymtab->objfile->deprecated_sym_private)->symtbl; |
| 1623 | |
| 1624 | if (symno < 0 || symno >= nsyms) |
| 1625 | { |
| 1626 | complaint (&symfile_complaints, _("Invalid symbol offset")); |
| 1627 | symbol->n_value = 0; |
| 1628 | symbol->n_scnum = -1; |
| 1629 | return; |
| 1630 | } |
| 1631 | bfd_coff_swap_sym_in (this_symtab_psymtab->objfile->obfd, |
| 1632 | stbl + (symno * local_symesz), |
| 1633 | symbol); |
| 1634 | } |
| 1635 | |
| 1636 | /* Get value corresponding to symbol number symno in symtbl. */ |
| 1637 | |
| 1638 | static CORE_ADDR |
| 1639 | read_symbol_nvalue (int symno) |
| 1640 | { |
| 1641 | struct internal_syment symbol[1]; |
| 1642 | |
| 1643 | read_symbol (symbol, symno); |
| 1644 | return symbol->n_value; |
| 1645 | } |
| 1646 | |
| 1647 | |
| 1648 | /* Find the address of the function corresponding to symno, where |
| 1649 | symno is the symbol pointed to by the linetable. */ |
| 1650 | |
| 1651 | static int |
| 1652 | read_symbol_lineno (int symno) |
| 1653 | { |
| 1654 | struct objfile *objfile = this_symtab_psymtab->objfile; |
| 1655 | int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd); |
| 1656 | |
| 1657 | struct coff_symfile_info *info = |
| 1658 | (struct coff_symfile_info *)objfile->deprecated_sym_private; |
| 1659 | int nsyms = info->symtbl_num_syms; |
| 1660 | char *stbl = info->symtbl; |
| 1661 | char *strtbl = info->strtbl; |
| 1662 | |
| 1663 | struct internal_syment symbol[1]; |
| 1664 | union internal_auxent main_aux[1]; |
| 1665 | |
| 1666 | if (symno < 0) |
| 1667 | { |
| 1668 | bf_notfound_complaint (); |
| 1669 | return 0; |
| 1670 | } |
| 1671 | |
| 1672 | /* Note that just searching for a short distance (e.g. 50 symbols) |
| 1673 | is not enough, at least in the following case. |
| 1674 | |
| 1675 | .extern foo |
| 1676 | [many .stabx entries] |
| 1677 | [a few functions, referring to foo] |
| 1678 | .globl foo |
| 1679 | .bf |
| 1680 | |
| 1681 | What happens here is that the assembler moves the .stabx entries |
| 1682 | to right before the ".bf" for foo, but the symbol for "foo" is before |
| 1683 | all the stabx entries. See PR gdb/2222. */ |
| 1684 | |
| 1685 | /* Maintaining a table of .bf entries might be preferable to this search. |
| 1686 | If I understand things correctly it would need to be done only for |
| 1687 | the duration of a single psymtab to symtab conversion. */ |
| 1688 | while (symno < nsyms) |
| 1689 | { |
| 1690 | bfd_coff_swap_sym_in (symfile_bfd, |
| 1691 | stbl + (symno * local_symesz), symbol); |
| 1692 | if (symbol->n_sclass == C_FCN) |
| 1693 | { |
| 1694 | char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name; |
| 1695 | |
| 1696 | if (strcmp (name, ".bf") == 0) |
| 1697 | goto gotit; |
| 1698 | } |
| 1699 | symno += symbol->n_numaux + 1; |
| 1700 | } |
| 1701 | |
| 1702 | bf_notfound_complaint (); |
| 1703 | return 0; |
| 1704 | |
| 1705 | gotit: |
| 1706 | /* take aux entry and return its lineno */ |
| 1707 | symno++; |
| 1708 | bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz, |
| 1709 | symbol->n_type, symbol->n_sclass, |
| 1710 | 0, symbol->n_numaux, main_aux); |
| 1711 | |
| 1712 | return main_aux->x_sym.x_misc.x_lnsz.x_lnno; |
| 1713 | } |
| 1714 | |
| 1715 | /* Support for line number handling */ |
| 1716 | |
| 1717 | /* This function is called for every section; it finds the outer limits |
| 1718 | * of the line table (minimum and maximum file offset) so that the |
| 1719 | * mainline code can read the whole thing for efficiency. |
| 1720 | */ |
| 1721 | static void |
| 1722 | find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo) |
| 1723 | { |
| 1724 | struct coff_symfile_info *info; |
| 1725 | int size, count; |
| 1726 | file_ptr offset, maxoff; |
| 1727 | |
| 1728 | count = asect->lineno_count; |
| 1729 | |
| 1730 | if (strcmp (asect->name, ".text") != 0 || count == 0) |
| 1731 | return; |
| 1732 | |
| 1733 | size = count * coff_data (abfd)->local_linesz; |
| 1734 | info = (struct coff_symfile_info *) vpinfo; |
| 1735 | offset = asect->line_filepos; |
| 1736 | maxoff = offset + size; |
| 1737 | |
| 1738 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) |
| 1739 | info->min_lineno_offset = offset; |
| 1740 | |
| 1741 | if (maxoff > info->max_lineno_offset) |
| 1742 | info->max_lineno_offset = maxoff; |
| 1743 | } |
| 1744 | \f |
| 1745 | static void xcoff_psymtab_to_symtab_1 (struct partial_symtab *); |
| 1746 | |
| 1747 | static void |
| 1748 | xcoff_psymtab_to_symtab_1 (struct partial_symtab *pst) |
| 1749 | { |
| 1750 | struct cleanup *old_chain; |
| 1751 | int i; |
| 1752 | |
| 1753 | if (!pst) |
| 1754 | return; |
| 1755 | |
| 1756 | if (pst->readin) |
| 1757 | { |
| 1758 | fprintf_unfiltered |
| 1759 | (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", |
| 1760 | pst->filename); |
| 1761 | return; |
| 1762 | } |
| 1763 | |
| 1764 | /* Read in all partial symtabs on which this one is dependent */ |
| 1765 | for (i = 0; i < pst->number_of_dependencies; i++) |
| 1766 | if (!pst->dependencies[i]->readin) |
| 1767 | { |
| 1768 | /* Inform about additional files that need to be read in. */ |
| 1769 | if (info_verbose) |
| 1770 | { |
| 1771 | fputs_filtered (" ", gdb_stdout); |
| 1772 | wrap_here (""); |
| 1773 | fputs_filtered ("and ", gdb_stdout); |
| 1774 | wrap_here (""); |
| 1775 | printf_filtered ("%s...", pst->dependencies[i]->filename); |
| 1776 | wrap_here (""); /* Flush output */ |
| 1777 | gdb_flush (gdb_stdout); |
| 1778 | } |
| 1779 | xcoff_psymtab_to_symtab_1 (pst->dependencies[i]); |
| 1780 | } |
| 1781 | |
| 1782 | if (((struct symloc *) pst->read_symtab_private)->numsyms != 0) |
| 1783 | { |
| 1784 | /* Init stuff necessary for reading in symbols. */ |
| 1785 | stabsread_init (); |
| 1786 | buildsym_init (); |
| 1787 | old_chain = make_cleanup (really_free_pendings, 0); |
| 1788 | |
| 1789 | read_xcoff_symtab (pst); |
| 1790 | |
| 1791 | do_cleanups (old_chain); |
| 1792 | } |
| 1793 | |
| 1794 | pst->readin = 1; |
| 1795 | } |
| 1796 | |
| 1797 | static void xcoff_psymtab_to_symtab (struct partial_symtab *); |
| 1798 | |
| 1799 | /* Read in all of the symbols for a given psymtab for real. |
| 1800 | Be verbose about it if the user wants that. */ |
| 1801 | |
| 1802 | static void |
| 1803 | xcoff_psymtab_to_symtab (struct partial_symtab *pst) |
| 1804 | { |
| 1805 | bfd *sym_bfd; |
| 1806 | |
| 1807 | if (!pst) |
| 1808 | return; |
| 1809 | |
| 1810 | if (pst->readin) |
| 1811 | { |
| 1812 | fprintf_unfiltered |
| 1813 | (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", |
| 1814 | pst->filename); |
| 1815 | return; |
| 1816 | } |
| 1817 | |
| 1818 | if (((struct symloc *) pst->read_symtab_private)->numsyms != 0 |
| 1819 | || pst->number_of_dependencies) |
| 1820 | { |
| 1821 | /* Print the message now, before reading the string table, |
| 1822 | to avoid disconcerting pauses. */ |
| 1823 | if (info_verbose) |
| 1824 | { |
| 1825 | printf_filtered ("Reading in symbols for %s...", pst->filename); |
| 1826 | gdb_flush (gdb_stdout); |
| 1827 | } |
| 1828 | |
| 1829 | sym_bfd = pst->objfile->obfd; |
| 1830 | |
| 1831 | next_symbol_text_func = xcoff_next_symbol_text; |
| 1832 | |
| 1833 | xcoff_psymtab_to_symtab_1 (pst); |
| 1834 | |
| 1835 | /* Match with global symbols. This only needs to be done once, |
| 1836 | after all of the symtabs and dependencies have been read in. */ |
| 1837 | scan_file_globals (pst->objfile); |
| 1838 | |
| 1839 | /* Finish up the debug error message. */ |
| 1840 | if (info_verbose) |
| 1841 | printf_filtered ("done.\n"); |
| 1842 | } |
| 1843 | } |
| 1844 | \f |
| 1845 | static void |
| 1846 | xcoff_new_init (struct objfile *objfile) |
| 1847 | { |
| 1848 | stabsread_new_init (); |
| 1849 | buildsym_new_init (); |
| 1850 | } |
| 1851 | |
| 1852 | /* Do initialization in preparation for reading symbols from OBJFILE. |
| 1853 | |
| 1854 | We will only be called if this is an XCOFF or XCOFF-like file. |
| 1855 | BFD handles figuring out the format of the file, and code in symfile.c |
| 1856 | uses BFD's determination to vector to us. */ |
| 1857 | |
| 1858 | static void |
| 1859 | xcoff_symfile_init (struct objfile *objfile) |
| 1860 | { |
| 1861 | /* Allocate struct to keep track of the symfile */ |
| 1862 | objfile->deprecated_sym_private = xmalloc (sizeof (struct coff_symfile_info)); |
| 1863 | |
| 1864 | /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we |
| 1865 | find this causes a significant slowdown in gdb then we could |
| 1866 | set it in the debug symbol readers only when necessary. */ |
| 1867 | objfile->flags |= OBJF_REORDERED; |
| 1868 | |
| 1869 | init_entry_point_info (objfile); |
| 1870 | } |
| 1871 | |
| 1872 | /* Perform any local cleanups required when we are done with a particular |
| 1873 | objfile. I.E, we are in the process of discarding all symbol information |
| 1874 | for an objfile, freeing up all memory held for it, and unlinking the |
| 1875 | objfile struct from the global list of known objfiles. */ |
| 1876 | |
| 1877 | static void |
| 1878 | xcoff_symfile_finish (struct objfile *objfile) |
| 1879 | { |
| 1880 | if (objfile->deprecated_sym_private != NULL) |
| 1881 | { |
| 1882 | xfree (objfile->deprecated_sym_private); |
| 1883 | } |
| 1884 | |
| 1885 | /* Start with a fresh include table for the next objfile. */ |
| 1886 | if (inclTable) |
| 1887 | { |
| 1888 | xfree (inclTable); |
| 1889 | inclTable = NULL; |
| 1890 | } |
| 1891 | inclIndx = inclLength = inclDepth = 0; |
| 1892 | } |
| 1893 | |
| 1894 | |
| 1895 | static void |
| 1896 | init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile) |
| 1897 | { |
| 1898 | long length; |
| 1899 | int val; |
| 1900 | unsigned char lengthbuf[4]; |
| 1901 | char *strtbl; |
| 1902 | |
| 1903 | ((struct coff_symfile_info *) objfile->deprecated_sym_private)->strtbl = NULL; |
| 1904 | |
| 1905 | if (bfd_seek (abfd, offset, SEEK_SET) < 0) |
| 1906 | error (_("cannot seek to string table in %s: %s"), |
| 1907 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
| 1908 | |
| 1909 | val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd); |
| 1910 | length = bfd_h_get_32 (abfd, lengthbuf); |
| 1911 | |
| 1912 | /* If no string table is needed, then the file may end immediately |
| 1913 | after the symbols. Just return with `strtbl' set to NULL. */ |
| 1914 | |
| 1915 | if (val != sizeof lengthbuf || length < sizeof lengthbuf) |
| 1916 | return; |
| 1917 | |
| 1918 | /* Allocate string table from objfile_obstack. We will need this table |
| 1919 | as long as we have its symbol table around. */ |
| 1920 | |
| 1921 | strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length); |
| 1922 | ((struct coff_symfile_info *) objfile->deprecated_sym_private)->strtbl = strtbl; |
| 1923 | |
| 1924 | /* Copy length buffer, the first byte is usually zero and is |
| 1925 | used for stabs with a name length of zero. */ |
| 1926 | memcpy (strtbl, lengthbuf, sizeof lengthbuf); |
| 1927 | if (length == sizeof lengthbuf) |
| 1928 | return; |
| 1929 | |
| 1930 | val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd); |
| 1931 | |
| 1932 | if (val != length - sizeof lengthbuf) |
| 1933 | error (_("cannot read string table from %s: %s"), |
| 1934 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
| 1935 | if (strtbl[length - 1] != '\0') |
| 1936 | error (_("bad symbol file: string table does not end with null character")); |
| 1937 | |
| 1938 | return; |
| 1939 | } |
| 1940 | \f |
| 1941 | /* If we have not yet seen a function for this psymtab, this is 0. If we |
| 1942 | have seen one, it is the offset in the line numbers of the line numbers |
| 1943 | for the psymtab. */ |
| 1944 | static unsigned int first_fun_line_offset; |
| 1945 | |
| 1946 | static struct partial_symtab *xcoff_start_psymtab |
| 1947 | (struct objfile *, char *, int, |
| 1948 | struct partial_symbol **, struct partial_symbol **); |
| 1949 | |
| 1950 | /* Allocate and partially fill a partial symtab. It will be |
| 1951 | completely filled at the end of the symbol list. |
| 1952 | |
| 1953 | SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR |
| 1954 | is the address relative to which its symbols are (incremental) or 0 |
| 1955 | (normal). */ |
| 1956 | |
| 1957 | static struct partial_symtab * |
| 1958 | xcoff_start_psymtab (struct objfile *objfile, char *filename, int first_symnum, |
| 1959 | struct partial_symbol **global_syms, |
| 1960 | struct partial_symbol **static_syms) |
| 1961 | { |
| 1962 | struct partial_symtab *result = |
| 1963 | start_psymtab_common (objfile, objfile->section_offsets, |
| 1964 | filename, |
| 1965 | /* We fill in textlow later. */ |
| 1966 | 0, |
| 1967 | global_syms, static_syms); |
| 1968 | |
| 1969 | result->read_symtab_private = obstack_alloc (&objfile->objfile_obstack, |
| 1970 | sizeof (struct symloc)); |
| 1971 | ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum; |
| 1972 | result->read_symtab = xcoff_psymtab_to_symtab; |
| 1973 | |
| 1974 | /* Deduce the source language from the filename for this psymtab. */ |
| 1975 | psymtab_language = deduce_language_from_filename (filename); |
| 1976 | |
| 1977 | return result; |
| 1978 | } |
| 1979 | |
| 1980 | static struct partial_symtab *xcoff_end_psymtab |
| 1981 | (struct partial_symtab *, char **, int, int, |
| 1982 | struct partial_symtab **, int, int); |
| 1983 | |
| 1984 | /* Close off the current usage of PST. |
| 1985 | Returns PST, or NULL if the partial symtab was empty and thrown away. |
| 1986 | |
| 1987 | CAPPING_SYMBOL_NUMBER is the end of pst (exclusive). |
| 1988 | |
| 1989 | INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES |
| 1990 | are the information for includes and dependencies. */ |
| 1991 | |
| 1992 | static struct partial_symtab * |
| 1993 | xcoff_end_psymtab (struct partial_symtab *pst, char **include_list, |
| 1994 | int num_includes, int capping_symbol_number, |
| 1995 | struct partial_symtab **dependency_list, |
| 1996 | int number_dependencies, int textlow_not_set) |
| 1997 | { |
| 1998 | int i; |
| 1999 | struct objfile *objfile = pst->objfile; |
| 2000 | |
| 2001 | if (capping_symbol_number != -1) |
| 2002 | ((struct symloc *) pst->read_symtab_private)->numsyms = |
| 2003 | capping_symbol_number |
| 2004 | - ((struct symloc *) pst->read_symtab_private)->first_symnum; |
| 2005 | ((struct symloc *) pst->read_symtab_private)->lineno_off = |
| 2006 | first_fun_line_offset; |
| 2007 | first_fun_line_offset = 0; |
| 2008 | pst->n_global_syms = |
| 2009 | objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset); |
| 2010 | pst->n_static_syms = |
| 2011 | objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset); |
| 2012 | |
| 2013 | pst->number_of_dependencies = number_dependencies; |
| 2014 | if (number_dependencies) |
| 2015 | { |
| 2016 | pst->dependencies = (struct partial_symtab **) |
| 2017 | obstack_alloc (&objfile->objfile_obstack, |
| 2018 | number_dependencies * sizeof (struct partial_symtab *)); |
| 2019 | memcpy (pst->dependencies, dependency_list, |
| 2020 | number_dependencies * sizeof (struct partial_symtab *)); |
| 2021 | } |
| 2022 | else |
| 2023 | pst->dependencies = 0; |
| 2024 | |
| 2025 | for (i = 0; i < num_includes; i++) |
| 2026 | { |
| 2027 | struct partial_symtab *subpst = |
| 2028 | allocate_psymtab (include_list[i], objfile); |
| 2029 | |
| 2030 | subpst->section_offsets = pst->section_offsets; |
| 2031 | subpst->read_symtab_private = obstack_alloc (&objfile->objfile_obstack, |
| 2032 | sizeof (struct symloc)); |
| 2033 | ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0; |
| 2034 | ((struct symloc *) subpst->read_symtab_private)->numsyms = 0; |
| 2035 | subpst->textlow = 0; |
| 2036 | subpst->texthigh = 0; |
| 2037 | |
| 2038 | /* We could save slight bits of space by only making one of these, |
| 2039 | shared by the entire set of include files. FIXME-someday. */ |
| 2040 | subpst->dependencies = (struct partial_symtab **) |
| 2041 | obstack_alloc (&objfile->objfile_obstack, |
| 2042 | sizeof (struct partial_symtab *)); |
| 2043 | subpst->dependencies[0] = pst; |
| 2044 | subpst->number_of_dependencies = 1; |
| 2045 | |
| 2046 | subpst->globals_offset = |
| 2047 | subpst->n_global_syms = |
| 2048 | subpst->statics_offset = |
| 2049 | subpst->n_static_syms = 0; |
| 2050 | |
| 2051 | subpst->readin = 0; |
| 2052 | subpst->symtab = 0; |
| 2053 | subpst->read_symtab = pst->read_symtab; |
| 2054 | } |
| 2055 | |
| 2056 | sort_pst_symbols (pst); |
| 2057 | |
| 2058 | if (num_includes == 0 |
| 2059 | && number_dependencies == 0 |
| 2060 | && pst->n_global_syms == 0 |
| 2061 | && pst->n_static_syms == 0) |
| 2062 | { |
| 2063 | /* Throw away this psymtab, it's empty. We can't deallocate it, since |
| 2064 | it is on the obstack, but we can forget to chain it on the list. */ |
| 2065 | /* Empty psymtabs happen as a result of header files which don't have |
| 2066 | any symbols in them. There can be a lot of them. */ |
| 2067 | |
| 2068 | discard_psymtab (pst); |
| 2069 | |
| 2070 | /* Indicate that psymtab was thrown away. */ |
| 2071 | pst = (struct partial_symtab *) NULL; |
| 2072 | } |
| 2073 | return pst; |
| 2074 | } |
| 2075 | |
| 2076 | static void swap_sym (struct internal_syment *, |
| 2077 | union internal_auxent *, char **, char **, |
| 2078 | unsigned int *, struct objfile *); |
| 2079 | |
| 2080 | /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in |
| 2081 | *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over |
| 2082 | the symbol and its auxents. */ |
| 2083 | |
| 2084 | static void |
| 2085 | swap_sym (struct internal_syment *symbol, union internal_auxent *aux, |
| 2086 | char **name, char **raw, unsigned int *symnump, |
| 2087 | struct objfile *objfile) |
| 2088 | { |
| 2089 | bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol); |
| 2090 | if (symbol->n_zeroes) |
| 2091 | { |
| 2092 | /* If it's exactly E_SYMNMLEN characters long it isn't |
| 2093 | '\0'-terminated. */ |
| 2094 | if (symbol->n_name[E_SYMNMLEN - 1] != '\0') |
| 2095 | { |
| 2096 | /* FIXME: wastes memory for symbols which we don't end up putting |
| 2097 | into the minimal symbols. */ |
| 2098 | char *p; |
| 2099 | |
| 2100 | p = obstack_alloc (&objfile->objfile_obstack, E_SYMNMLEN + 1); |
| 2101 | strncpy (p, symbol->n_name, E_SYMNMLEN); |
| 2102 | p[E_SYMNMLEN] = '\0'; |
| 2103 | *name = p; |
| 2104 | } |
| 2105 | else |
| 2106 | /* Point to the unswapped name as that persists as long as the |
| 2107 | objfile does. */ |
| 2108 | *name = ((struct external_syment *) *raw)->e.e_name; |
| 2109 | } |
| 2110 | else if (symbol->n_sclass & 0x80) |
| 2111 | { |
| 2112 | *name = ((struct coff_symfile_info *) objfile->deprecated_sym_private)->debugsec |
| 2113 | + symbol->n_offset; |
| 2114 | } |
| 2115 | else |
| 2116 | { |
| 2117 | *name = ((struct coff_symfile_info *) objfile->deprecated_sym_private)->strtbl |
| 2118 | + symbol->n_offset; |
| 2119 | } |
| 2120 | ++*symnump; |
| 2121 | *raw += coff_data (objfile->obfd)->local_symesz; |
| 2122 | if (symbol->n_numaux > 0) |
| 2123 | { |
| 2124 | bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type, |
| 2125 | symbol->n_sclass, 0, symbol->n_numaux, aux); |
| 2126 | |
| 2127 | *symnump += symbol->n_numaux; |
| 2128 | *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux; |
| 2129 | } |
| 2130 | } |
| 2131 | |
| 2132 | static void |
| 2133 | function_outside_compilation_unit_complaint (const char *arg1) |
| 2134 | { |
| 2135 | complaint (&symfile_complaints, |
| 2136 | _("function `%s' appears to be defined outside of all compilation units"), |
| 2137 | arg1); |
| 2138 | } |
| 2139 | |
| 2140 | static void |
| 2141 | scan_xcoff_symtab (struct objfile *objfile) |
| 2142 | { |
| 2143 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 2144 | CORE_ADDR toc_offset = 0; /* toc offset value in data section. */ |
| 2145 | char *filestring = NULL; |
| 2146 | |
| 2147 | char *namestring; |
| 2148 | int past_first_source_file = 0; |
| 2149 | bfd *abfd; |
| 2150 | asection *bfd_sect; |
| 2151 | unsigned int nsyms; |
| 2152 | |
| 2153 | /* Current partial symtab */ |
| 2154 | struct partial_symtab *pst; |
| 2155 | |
| 2156 | /* List of current psymtab's include files */ |
| 2157 | char **psymtab_include_list; |
| 2158 | int includes_allocated; |
| 2159 | int includes_used; |
| 2160 | |
| 2161 | /* Index within current psymtab dependency list */ |
| 2162 | struct partial_symtab **dependency_list; |
| 2163 | int dependencies_used, dependencies_allocated; |
| 2164 | |
| 2165 | char *sraw_symbol; |
| 2166 | struct internal_syment symbol; |
| 2167 | union internal_auxent main_aux[5]; |
| 2168 | unsigned int ssymnum; |
| 2169 | |
| 2170 | char *last_csect_name = NULL; /* last seen csect's name and value */ |
| 2171 | CORE_ADDR last_csect_val = 0; |
| 2172 | int last_csect_sec = 0; |
| 2173 | int misc_func_recorded = 0; /* true if any misc. function */ |
| 2174 | int textlow_not_set = 1; |
| 2175 | |
| 2176 | pst = (struct partial_symtab *) 0; |
| 2177 | |
| 2178 | includes_allocated = 30; |
| 2179 | includes_used = 0; |
| 2180 | psymtab_include_list = (char **) alloca (includes_allocated * |
| 2181 | sizeof (char *)); |
| 2182 | |
| 2183 | dependencies_allocated = 30; |
| 2184 | dependencies_used = 0; |
| 2185 | dependency_list = |
| 2186 | (struct partial_symtab **) alloca (dependencies_allocated * |
| 2187 | sizeof (struct partial_symtab *)); |
| 2188 | |
| 2189 | last_source_file = NULL; |
| 2190 | |
| 2191 | abfd = objfile->obfd; |
| 2192 | next_symbol_text_func = xcoff_next_symbol_text; |
| 2193 | |
| 2194 | sraw_symbol = ((struct coff_symfile_info *) objfile->deprecated_sym_private)->symtbl; |
| 2195 | nsyms = ((struct coff_symfile_info *) objfile->deprecated_sym_private)->symtbl_num_syms; |
| 2196 | ssymnum = 0; |
| 2197 | while (ssymnum < nsyms) |
| 2198 | { |
| 2199 | int sclass; |
| 2200 | |
| 2201 | QUIT; |
| 2202 | |
| 2203 | bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol); |
| 2204 | sclass = symbol.n_sclass; |
| 2205 | |
| 2206 | switch (sclass) |
| 2207 | { |
| 2208 | case C_EXT: |
| 2209 | case C_HIDEXT: |
| 2210 | { |
| 2211 | /* The CSECT auxent--always the last auxent. */ |
| 2212 | union internal_auxent csect_aux; |
| 2213 | unsigned int symnum_before = ssymnum; |
| 2214 | |
| 2215 | swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, |
| 2216 | &ssymnum, objfile); |
| 2217 | if (symbol.n_numaux > 1) |
| 2218 | { |
| 2219 | bfd_coff_swap_aux_in |
| 2220 | (objfile->obfd, |
| 2221 | sraw_symbol - coff_data (abfd)->local_symesz, |
| 2222 | symbol.n_type, |
| 2223 | symbol.n_sclass, |
| 2224 | symbol.n_numaux - 1, |
| 2225 | symbol.n_numaux, |
| 2226 | &csect_aux); |
| 2227 | } |
| 2228 | else |
| 2229 | csect_aux = main_aux[0]; |
| 2230 | |
| 2231 | /* If symbol name starts with ".$" or "$", ignore it. */ |
| 2232 | if (namestring[0] == '$' |
| 2233 | || (namestring[0] == '.' && namestring[1] == '$')) |
| 2234 | break; |
| 2235 | |
| 2236 | switch (csect_aux.x_csect.x_smtyp & 0x7) |
| 2237 | { |
| 2238 | case XTY_SD: |
| 2239 | switch (csect_aux.x_csect.x_smclas) |
| 2240 | { |
| 2241 | case XMC_PR: |
| 2242 | if (last_csect_name) |
| 2243 | { |
| 2244 | /* If no misc. function recorded in the last |
| 2245 | seen csect, enter it as a function. This |
| 2246 | will take care of functions like strcmp() |
| 2247 | compiled by xlc. */ |
| 2248 | |
| 2249 | if (!misc_func_recorded) |
| 2250 | { |
| 2251 | RECORD_MINIMAL_SYMBOL |
| 2252 | (last_csect_name, last_csect_val, |
| 2253 | mst_text, last_csect_sec, |
| 2254 | objfile); |
| 2255 | } |
| 2256 | |
| 2257 | if (pst != NULL) |
| 2258 | { |
| 2259 | /* We have to allocate one psymtab for |
| 2260 | each program csect, because their text |
| 2261 | sections need not be adjacent. */ |
| 2262 | xcoff_end_psymtab |
| 2263 | (pst, psymtab_include_list, includes_used, |
| 2264 | symnum_before, dependency_list, |
| 2265 | dependencies_used, textlow_not_set); |
| 2266 | includes_used = 0; |
| 2267 | dependencies_used = 0; |
| 2268 | /* Give all psymtabs for this source file the same |
| 2269 | name. */ |
| 2270 | pst = xcoff_start_psymtab |
| 2271 | (objfile, |
| 2272 | filestring, |
| 2273 | symnum_before, |
| 2274 | objfile->global_psymbols.next, |
| 2275 | objfile->static_psymbols.next); |
| 2276 | } |
| 2277 | } |
| 2278 | /* Activate the misc_func_recorded mechanism for |
| 2279 | compiler- and linker-generated CSECTs like ".strcmp" |
| 2280 | and "@FIX1". */ |
| 2281 | if (namestring && (namestring[0] == '.' |
| 2282 | || namestring[0] == '@')) |
| 2283 | { |
| 2284 | last_csect_name = namestring; |
| 2285 | last_csect_val = symbol.n_value; |
| 2286 | last_csect_sec = |
| 2287 | secnum_to_section (symbol.n_scnum, objfile); |
| 2288 | } |
| 2289 | if (pst != NULL) |
| 2290 | { |
| 2291 | CORE_ADDR highval = |
| 2292 | symbol.n_value + csect_aux.x_csect.x_scnlen.l; |
| 2293 | |
| 2294 | if (highval > pst->texthigh) |
| 2295 | pst->texthigh = highval; |
| 2296 | if (pst->textlow == 0 || symbol.n_value < pst->textlow) |
| 2297 | pst->textlow = symbol.n_value; |
| 2298 | } |
| 2299 | misc_func_recorded = 0; |
| 2300 | break; |
| 2301 | |
| 2302 | case XMC_RW: |
| 2303 | case XMC_TD: |
| 2304 | /* Data variables are recorded in the minimal symbol |
| 2305 | table, except for section symbols. */ |
| 2306 | if (*namestring != '.') |
| 2307 | prim_record_minimal_symbol_and_info |
| 2308 | (namestring, symbol.n_value, |
| 2309 | sclass == C_HIDEXT ? mst_file_data : mst_data, |
| 2310 | secnum_to_section (symbol.n_scnum, objfile), |
| 2311 | NULL, objfile); |
| 2312 | break; |
| 2313 | |
| 2314 | case XMC_TC0: |
| 2315 | if (toc_offset) |
| 2316 | warning (_("More than one XMC_TC0 symbol found.")); |
| 2317 | toc_offset = symbol.n_value; |
| 2318 | |
| 2319 | /* Make TOC offset relative to start address of section. */ |
| 2320 | bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile); |
| 2321 | if (bfd_sect) |
| 2322 | toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect); |
| 2323 | break; |
| 2324 | |
| 2325 | case XMC_TC: |
| 2326 | /* These symbols tell us where the TOC entry for a |
| 2327 | variable is, not the variable itself. */ |
| 2328 | break; |
| 2329 | |
| 2330 | default: |
| 2331 | break; |
| 2332 | } |
| 2333 | break; |
| 2334 | |
| 2335 | case XTY_LD: |
| 2336 | switch (csect_aux.x_csect.x_smclas) |
| 2337 | { |
| 2338 | case XMC_PR: |
| 2339 | /* A function entry point. */ |
| 2340 | |
| 2341 | if (first_fun_line_offset == 0 && symbol.n_numaux > 1) |
| 2342 | first_fun_line_offset = |
| 2343 | main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr; |
| 2344 | RECORD_MINIMAL_SYMBOL |
| 2345 | (namestring, symbol.n_value, |
| 2346 | sclass == C_HIDEXT ? mst_file_text : mst_text, |
| 2347 | secnum_to_section (symbol.n_scnum, objfile), |
| 2348 | objfile); |
| 2349 | break; |
| 2350 | |
| 2351 | case XMC_GL: |
| 2352 | /* shared library function trampoline code entry |
| 2353 | point. */ |
| 2354 | |
| 2355 | /* record trampoline code entries as |
| 2356 | mst_solib_trampoline symbol. When we lookup mst |
| 2357 | symbols, we will choose mst_text over |
| 2358 | mst_solib_trampoline. */ |
| 2359 | RECORD_MINIMAL_SYMBOL |
| 2360 | (namestring, symbol.n_value, |
| 2361 | mst_solib_trampoline, |
| 2362 | secnum_to_section (symbol.n_scnum, objfile), |
| 2363 | objfile); |
| 2364 | break; |
| 2365 | |
| 2366 | case XMC_DS: |
| 2367 | /* The symbols often have the same names as |
| 2368 | debug symbols for functions, and confuse |
| 2369 | lookup_symbol. */ |
| 2370 | break; |
| 2371 | |
| 2372 | default: |
| 2373 | |
| 2374 | /* xlc puts each variable in a separate csect, |
| 2375 | so we get an XTY_SD for each variable. But |
| 2376 | gcc puts several variables in a csect, so |
| 2377 | that each variable only gets an XTY_LD. We |
| 2378 | still need to record them. This will |
| 2379 | typically be XMC_RW; I suspect XMC_RO and |
| 2380 | XMC_BS might be possible too. */ |
| 2381 | if (*namestring != '.') |
| 2382 | prim_record_minimal_symbol_and_info |
| 2383 | (namestring, symbol.n_value, |
| 2384 | sclass == C_HIDEXT ? mst_file_data : mst_data, |
| 2385 | secnum_to_section (symbol.n_scnum, objfile), |
| 2386 | NULL, objfile); |
| 2387 | break; |
| 2388 | } |
| 2389 | break; |
| 2390 | |
| 2391 | case XTY_CM: |
| 2392 | switch (csect_aux.x_csect.x_smclas) |
| 2393 | { |
| 2394 | case XMC_RW: |
| 2395 | case XMC_BS: |
| 2396 | /* Common variables are recorded in the minimal symbol |
| 2397 | table, except for section symbols. */ |
| 2398 | if (*namestring != '.') |
| 2399 | prim_record_minimal_symbol_and_info |
| 2400 | (namestring, symbol.n_value, |
| 2401 | sclass == C_HIDEXT ? mst_file_bss : mst_bss, |
| 2402 | secnum_to_section (symbol.n_scnum, objfile), |
| 2403 | NULL, objfile); |
| 2404 | break; |
| 2405 | } |
| 2406 | break; |
| 2407 | |
| 2408 | default: |
| 2409 | break; |
| 2410 | } |
| 2411 | } |
| 2412 | break; |
| 2413 | case C_FILE: |
| 2414 | { |
| 2415 | unsigned int symnum_before; |
| 2416 | |
| 2417 | symnum_before = ssymnum; |
| 2418 | swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, |
| 2419 | &ssymnum, objfile); |
| 2420 | |
| 2421 | /* See if the last csect needs to be recorded. */ |
| 2422 | |
| 2423 | if (last_csect_name && !misc_func_recorded) |
| 2424 | { |
| 2425 | /* If no misc. function recorded in the last seen csect, enter |
| 2426 | it as a function. This will take care of functions like |
| 2427 | strcmp() compiled by xlc. */ |
| 2428 | |
| 2429 | RECORD_MINIMAL_SYMBOL |
| 2430 | (last_csect_name, last_csect_val, |
| 2431 | mst_text, last_csect_sec, objfile); |
| 2432 | } |
| 2433 | |
| 2434 | if (pst) |
| 2435 | { |
| 2436 | xcoff_end_psymtab (pst, psymtab_include_list, includes_used, |
| 2437 | symnum_before, dependency_list, |
| 2438 | dependencies_used, textlow_not_set); |
| 2439 | includes_used = 0; |
| 2440 | dependencies_used = 0; |
| 2441 | } |
| 2442 | first_fun_line_offset = 0; |
| 2443 | |
| 2444 | /* XCOFF, according to the AIX 3.2 documentation, puts the |
| 2445 | filename in cs->c_name. But xlc 1.3.0.2 has decided to |
| 2446 | do things the standard COFF way and put it in the auxent. |
| 2447 | We use the auxent if the symbol is ".file" and an auxent |
| 2448 | exists, otherwise use the symbol itself. */ |
| 2449 | if (!strcmp (namestring, ".file") && symbol.n_numaux > 0) |
| 2450 | { |
| 2451 | filestring = coff_getfilename (&main_aux[0], objfile); |
| 2452 | } |
| 2453 | else |
| 2454 | filestring = namestring; |
| 2455 | |
| 2456 | pst = xcoff_start_psymtab (objfile, |
| 2457 | filestring, |
| 2458 | symnum_before, |
| 2459 | objfile->global_psymbols.next, |
| 2460 | objfile->static_psymbols.next); |
| 2461 | last_csect_name = NULL; |
| 2462 | } |
| 2463 | break; |
| 2464 | |
| 2465 | default: |
| 2466 | { |
| 2467 | complaint (&symfile_complaints, |
| 2468 | _("Storage class %d not recognized during scan"), sclass); |
| 2469 | } |
| 2470 | /* FALLTHROUGH */ |
| 2471 | |
| 2472 | /* C_FCN is .bf and .ef symbols. I think it is sufficient |
| 2473 | to handle only the C_FUN and C_EXT. */ |
| 2474 | case C_FCN: |
| 2475 | |
| 2476 | case C_BSTAT: |
| 2477 | case C_ESTAT: |
| 2478 | case C_ARG: |
| 2479 | case C_REGPARM: |
| 2480 | case C_REG: |
| 2481 | case C_TPDEF: |
| 2482 | case C_STRTAG: |
| 2483 | case C_UNTAG: |
| 2484 | case C_ENTAG: |
| 2485 | case C_LABEL: |
| 2486 | case C_NULL: |
| 2487 | |
| 2488 | /* C_EINCL means we are switching back to the main file. But there |
| 2489 | is no reason to care; the only thing we want to know about |
| 2490 | includes is the names of all the included (.h) files. */ |
| 2491 | case C_EINCL: |
| 2492 | |
| 2493 | case C_BLOCK: |
| 2494 | |
| 2495 | /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be |
| 2496 | used instead. */ |
| 2497 | case C_STAT: |
| 2498 | |
| 2499 | /* I don't think the name of the common block (as opposed to the |
| 2500 | variables within it) is something which is user visible |
| 2501 | currently. */ |
| 2502 | case C_BCOMM: |
| 2503 | case C_ECOMM: |
| 2504 | |
| 2505 | case C_PSYM: |
| 2506 | case C_RPSYM: |
| 2507 | |
| 2508 | /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL |
| 2509 | so C_LSYM would appear to be only for locals. */ |
| 2510 | case C_LSYM: |
| 2511 | |
| 2512 | case C_AUTO: |
| 2513 | case C_RSYM: |
| 2514 | { |
| 2515 | /* We probably could save a few instructions by assuming that |
| 2516 | C_LSYM, C_PSYM, etc., never have auxents. */ |
| 2517 | int naux1 = symbol.n_numaux + 1; |
| 2518 | |
| 2519 | ssymnum += naux1; |
| 2520 | sraw_symbol += bfd_coff_symesz (abfd) * naux1; |
| 2521 | } |
| 2522 | break; |
| 2523 | |
| 2524 | case C_BINCL: |
| 2525 | { |
| 2526 | /* Mark down an include file in the current psymtab */ |
| 2527 | enum language tmp_language; |
| 2528 | |
| 2529 | swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, |
| 2530 | &ssymnum, objfile); |
| 2531 | |
| 2532 | tmp_language = deduce_language_from_filename (namestring); |
| 2533 | |
| 2534 | /* Only change the psymtab's language if we've learned |
| 2535 | something useful (eg. tmp_language is not language_unknown). |
| 2536 | In addition, to match what start_subfile does, never change |
| 2537 | from C++ to C. */ |
| 2538 | if (tmp_language != language_unknown |
| 2539 | && (tmp_language != language_c |
| 2540 | || psymtab_language != language_cplus)) |
| 2541 | psymtab_language = tmp_language; |
| 2542 | |
| 2543 | /* In C++, one may expect the same filename to come round many |
| 2544 | times, when code is coming alternately from the main file |
| 2545 | and from inline functions in other files. So I check to see |
| 2546 | if this is a file we've seen before -- either the main |
| 2547 | source file, or a previously included file. |
| 2548 | |
| 2549 | This seems to be a lot of time to be spending on N_SOL, but |
| 2550 | things like "break c-exp.y:435" need to work (I |
| 2551 | suppose the psymtab_include_list could be hashed or put |
| 2552 | in a binary tree, if profiling shows this is a major hog). */ |
| 2553 | if (pst && strcmp (namestring, pst->filename) == 0) |
| 2554 | continue; |
| 2555 | |
| 2556 | { |
| 2557 | int i; |
| 2558 | |
| 2559 | for (i = 0; i < includes_used; i++) |
| 2560 | if (strcmp (namestring, psymtab_include_list[i]) == 0) |
| 2561 | { |
| 2562 | i = -1; |
| 2563 | break; |
| 2564 | } |
| 2565 | if (i == -1) |
| 2566 | continue; |
| 2567 | } |
| 2568 | psymtab_include_list[includes_used++] = namestring; |
| 2569 | if (includes_used >= includes_allocated) |
| 2570 | { |
| 2571 | char **orig = psymtab_include_list; |
| 2572 | |
| 2573 | psymtab_include_list = (char **) |
| 2574 | alloca ((includes_allocated *= 2) * |
| 2575 | sizeof (char *)); |
| 2576 | memcpy (psymtab_include_list, orig, |
| 2577 | includes_used * sizeof (char *)); |
| 2578 | } |
| 2579 | continue; |
| 2580 | } |
| 2581 | case C_FUN: |
| 2582 | /* The value of the C_FUN is not the address of the function (it |
| 2583 | appears to be the address before linking), but as long as it |
| 2584 | is smaller than the actual address, then find_pc_partial_function |
| 2585 | will use the minimal symbols instead. I hope. */ |
| 2586 | |
| 2587 | case C_GSYM: |
| 2588 | case C_ECOML: |
| 2589 | case C_DECL: |
| 2590 | case C_STSYM: |
| 2591 | { |
| 2592 | char *p; |
| 2593 | |
| 2594 | swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, |
| 2595 | &ssymnum, objfile); |
| 2596 | |
| 2597 | p = (char *) strchr (namestring, ':'); |
| 2598 | if (!p) |
| 2599 | continue; /* Not a debugging symbol. */ |
| 2600 | |
| 2601 | /* Main processing section for debugging symbols which |
| 2602 | the initial read through the symbol tables needs to worry |
| 2603 | about. If we reach this point, the symbol which we are |
| 2604 | considering is definitely one we are interested in. |
| 2605 | p must also contain the (valid) index into the namestring |
| 2606 | which indicates the debugging type symbol. */ |
| 2607 | |
| 2608 | switch (p[1]) |
| 2609 | { |
| 2610 | case 'S': |
| 2611 | symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); |
| 2612 | |
| 2613 | if (gdbarch_static_transform_name_p (gdbarch)) |
| 2614 | namestring = gdbarch_static_transform_name |
| 2615 | (gdbarch, namestring); |
| 2616 | |
| 2617 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2618 | VAR_DOMAIN, LOC_STATIC, |
| 2619 | &objfile->static_psymbols, |
| 2620 | 0, symbol.n_value, |
| 2621 | psymtab_language, objfile); |
| 2622 | continue; |
| 2623 | |
| 2624 | case 'G': |
| 2625 | symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile)); |
| 2626 | /* The addresses in these entries are reported to be |
| 2627 | wrong. See the code that reads 'G's for symtabs. */ |
| 2628 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2629 | VAR_DOMAIN, LOC_STATIC, |
| 2630 | &objfile->global_psymbols, |
| 2631 | 0, symbol.n_value, |
| 2632 | psymtab_language, objfile); |
| 2633 | continue; |
| 2634 | |
| 2635 | case 'T': |
| 2636 | /* When a 'T' entry is defining an anonymous enum, it |
| 2637 | may have a name which is the empty string, or a |
| 2638 | single space. Since they're not really defining a |
| 2639 | symbol, those shouldn't go in the partial symbol |
| 2640 | table. We do pick up the elements of such enums at |
| 2641 | 'check_enum:', below. */ |
| 2642 | if (p >= namestring + 2 |
| 2643 | || (p == namestring + 1 |
| 2644 | && namestring[0] != ' ')) |
| 2645 | { |
| 2646 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2647 | STRUCT_DOMAIN, LOC_TYPEDEF, |
| 2648 | &objfile->static_psymbols, |
| 2649 | symbol.n_value, 0, |
| 2650 | psymtab_language, objfile); |
| 2651 | if (p[2] == 't') |
| 2652 | { |
| 2653 | /* Also a typedef with the same name. */ |
| 2654 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2655 | VAR_DOMAIN, LOC_TYPEDEF, |
| 2656 | &objfile->static_psymbols, |
| 2657 | symbol.n_value, 0, |
| 2658 | psymtab_language, objfile); |
| 2659 | p += 1; |
| 2660 | } |
| 2661 | } |
| 2662 | goto check_enum; |
| 2663 | |
| 2664 | case 't': |
| 2665 | if (p != namestring) /* a name is there, not just :T... */ |
| 2666 | { |
| 2667 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2668 | VAR_DOMAIN, LOC_TYPEDEF, |
| 2669 | &objfile->static_psymbols, |
| 2670 | symbol.n_value, 0, |
| 2671 | psymtab_language, objfile); |
| 2672 | } |
| 2673 | check_enum: |
| 2674 | /* If this is an enumerated type, we need to |
| 2675 | add all the enum constants to the partial symbol |
| 2676 | table. This does not cover enums without names, e.g. |
| 2677 | "enum {a, b} c;" in C, but fortunately those are |
| 2678 | rare. There is no way for GDB to find those from the |
| 2679 | enum type without spending too much time on it. Thus |
| 2680 | to solve this problem, the compiler needs to put out the |
| 2681 | enum in a nameless type. GCC2 does this. */ |
| 2682 | |
| 2683 | /* We are looking for something of the form |
| 2684 | <name> ":" ("t" | "T") [<number> "="] "e" |
| 2685 | {<constant> ":" <value> ","} ";". */ |
| 2686 | |
| 2687 | /* Skip over the colon and the 't' or 'T'. */ |
| 2688 | p += 2; |
| 2689 | /* This type may be given a number. Also, numbers can come |
| 2690 | in pairs like (0,26). Skip over it. */ |
| 2691 | while ((*p >= '0' && *p <= '9') |
| 2692 | || *p == '(' || *p == ',' || *p == ')' |
| 2693 | || *p == '=') |
| 2694 | p++; |
| 2695 | |
| 2696 | if (*p++ == 'e') |
| 2697 | { |
| 2698 | /* The aix4 compiler emits extra crud before the members. */ |
| 2699 | if (*p == '-') |
| 2700 | { |
| 2701 | /* Skip over the type (?). */ |
| 2702 | while (*p != ':') |
| 2703 | p++; |
| 2704 | |
| 2705 | /* Skip over the colon. */ |
| 2706 | p++; |
| 2707 | } |
| 2708 | |
| 2709 | /* We have found an enumerated type. */ |
| 2710 | /* According to comments in read_enum_type |
| 2711 | a comma could end it instead of a semicolon. |
| 2712 | I don't know where that happens. |
| 2713 | Accept either. */ |
| 2714 | while (*p && *p != ';' && *p != ',') |
| 2715 | { |
| 2716 | char *q; |
| 2717 | |
| 2718 | /* Check for and handle cretinous dbx symbol name |
| 2719 | continuation! */ |
| 2720 | if (*p == '\\' || (*p == '?' && p[1] == '\0')) |
| 2721 | p = next_symbol_text (objfile); |
| 2722 | |
| 2723 | /* Point to the character after the name |
| 2724 | of the enum constant. */ |
| 2725 | for (q = p; *q && *q != ':'; q++) |
| 2726 | ; |
| 2727 | /* Note that the value doesn't matter for |
| 2728 | enum constants in psymtabs, just in symtabs. */ |
| 2729 | add_psymbol_to_list (p, q - p, 1, |
| 2730 | VAR_DOMAIN, LOC_CONST, |
| 2731 | &objfile->static_psymbols, 0, |
| 2732 | 0, psymtab_language, objfile); |
| 2733 | /* Point past the name. */ |
| 2734 | p = q; |
| 2735 | /* Skip over the value. */ |
| 2736 | while (*p && *p != ',') |
| 2737 | p++; |
| 2738 | /* Advance past the comma. */ |
| 2739 | if (*p) |
| 2740 | p++; |
| 2741 | } |
| 2742 | } |
| 2743 | continue; |
| 2744 | |
| 2745 | case 'c': |
| 2746 | /* Constant, e.g. from "const" in Pascal. */ |
| 2747 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2748 | VAR_DOMAIN, LOC_CONST, |
| 2749 | &objfile->static_psymbols, symbol.n_value, |
| 2750 | 0, psymtab_language, objfile); |
| 2751 | continue; |
| 2752 | |
| 2753 | case 'f': |
| 2754 | if (! pst) |
| 2755 | { |
| 2756 | int name_len = p - namestring; |
| 2757 | char *name = xmalloc (name_len + 1); |
| 2758 | |
| 2759 | memcpy (name, namestring, name_len); |
| 2760 | name[name_len] = '\0'; |
| 2761 | function_outside_compilation_unit_complaint (name); |
| 2762 | xfree (name); |
| 2763 | } |
| 2764 | symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 2765 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2766 | VAR_DOMAIN, LOC_BLOCK, |
| 2767 | &objfile->static_psymbols, |
| 2768 | 0, symbol.n_value, |
| 2769 | psymtab_language, objfile); |
| 2770 | continue; |
| 2771 | |
| 2772 | /* Global functions were ignored here, but now they |
| 2773 | are put into the global psymtab like one would expect. |
| 2774 | They're also in the minimal symbol table. */ |
| 2775 | case 'F': |
| 2776 | if (! pst) |
| 2777 | { |
| 2778 | int name_len = p - namestring; |
| 2779 | char *name = xmalloc (name_len + 1); |
| 2780 | |
| 2781 | memcpy (name, namestring, name_len); |
| 2782 | name[name_len] = '\0'; |
| 2783 | function_outside_compilation_unit_complaint (name); |
| 2784 | xfree (name); |
| 2785 | } |
| 2786 | |
| 2787 | /* We need only the minimal symbols for these |
| 2788 | loader-generated definitions. Keeping the global |
| 2789 | symbols leads to "in psymbols but not in symbols" |
| 2790 | errors. */ |
| 2791 | if (strncmp (namestring, "@FIX", 4) == 0) |
| 2792 | continue; |
| 2793 | |
| 2794 | symbol.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 2795 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2796 | VAR_DOMAIN, LOC_BLOCK, |
| 2797 | &objfile->global_psymbols, |
| 2798 | 0, symbol.n_value, |
| 2799 | psymtab_language, objfile); |
| 2800 | continue; |
| 2801 | |
| 2802 | /* Two things show up here (hopefully); static symbols of |
| 2803 | local scope (static used inside braces) or extensions |
| 2804 | of structure symbols. We can ignore both. */ |
| 2805 | case 'V': |
| 2806 | case '(': |
| 2807 | case '0': |
| 2808 | case '1': |
| 2809 | case '2': |
| 2810 | case '3': |
| 2811 | case '4': |
| 2812 | case '5': |
| 2813 | case '6': |
| 2814 | case '7': |
| 2815 | case '8': |
| 2816 | case '9': |
| 2817 | case '-': |
| 2818 | case '#': /* for symbol identification (used in live ranges) */ |
| 2819 | continue; |
| 2820 | |
| 2821 | case ':': |
| 2822 | /* It is a C++ nested symbol. We don't need to record it |
| 2823 | (I don't think); if we try to look up foo::bar::baz, |
| 2824 | then symbols for the symtab containing foo should get |
| 2825 | read in, I think. */ |
| 2826 | /* Someone says sun cc puts out symbols like |
| 2827 | /foo/baz/maclib::/usr/local/bin/maclib, |
| 2828 | which would get here with a symbol type of ':'. */ |
| 2829 | continue; |
| 2830 | |
| 2831 | default: |
| 2832 | /* Unexpected symbol descriptor. The second and subsequent stabs |
| 2833 | of a continued stab can show up here. The question is |
| 2834 | whether they ever can mimic a normal stab--it would be |
| 2835 | nice if not, since we certainly don't want to spend the |
| 2836 | time searching to the end of every string looking for |
| 2837 | a backslash. */ |
| 2838 | |
| 2839 | complaint (&symfile_complaints, |
| 2840 | _("unknown symbol descriptor `%c'"), p[1]); |
| 2841 | |
| 2842 | /* Ignore it; perhaps it is an extension that we don't |
| 2843 | know about. */ |
| 2844 | continue; |
| 2845 | } |
| 2846 | } |
| 2847 | } |
| 2848 | } |
| 2849 | |
| 2850 | if (pst) |
| 2851 | { |
| 2852 | xcoff_end_psymtab (pst, psymtab_include_list, includes_used, |
| 2853 | ssymnum, dependency_list, |
| 2854 | dependencies_used, textlow_not_set); |
| 2855 | } |
| 2856 | |
| 2857 | /* Record the toc offset value of this symbol table into objfile structure. |
| 2858 | If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain |
| 2859 | this information would be file auxiliary header. */ |
| 2860 | |
| 2861 | ((struct coff_symfile_info *) objfile->deprecated_sym_private)->toc_offset = toc_offset; |
| 2862 | } |
| 2863 | |
| 2864 | /* Return the toc offset value for a given objfile. */ |
| 2865 | |
| 2866 | CORE_ADDR |
| 2867 | xcoff_get_toc_offset (struct objfile *objfile) |
| 2868 | { |
| 2869 | if (objfile) |
| 2870 | return ((struct coff_symfile_info *) objfile->deprecated_sym_private)->toc_offset; |
| 2871 | return 0; |
| 2872 | } |
| 2873 | |
| 2874 | /* Scan and build partial symbols for a symbol file. |
| 2875 | We have been initialized by a call to dbx_symfile_init, which |
| 2876 | put all the relevant info into a "struct dbx_symfile_info", |
| 2877 | hung off the objfile structure. |
| 2878 | |
| 2879 | SECTION_OFFSETS contains offsets relative to which the symbols in the |
| 2880 | various sections are (depending where the sections were actually loaded). |
| 2881 | */ |
| 2882 | |
| 2883 | static void |
| 2884 | xcoff_initial_scan (struct objfile *objfile, int symfile_flags) |
| 2885 | { |
| 2886 | bfd *abfd; |
| 2887 | int val; |
| 2888 | struct cleanup *back_to; |
| 2889 | int num_symbols; /* # of symbols */ |
| 2890 | file_ptr symtab_offset; /* symbol table and */ |
| 2891 | file_ptr stringtab_offset; /* string table file offsets */ |
| 2892 | struct coff_symfile_info *info; |
| 2893 | char *name; |
| 2894 | unsigned int size; |
| 2895 | |
| 2896 | info = (struct coff_symfile_info *) objfile->deprecated_sym_private; |
| 2897 | symfile_bfd = abfd = objfile->obfd; |
| 2898 | name = objfile->name; |
| 2899 | |
| 2900 | num_symbols = bfd_get_symcount (abfd); /* # of symbols */ |
| 2901 | symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */ |
| 2902 | stringtab_offset = symtab_offset + |
| 2903 | num_symbols * coff_data (abfd)->local_symesz; |
| 2904 | |
| 2905 | info->min_lineno_offset = 0; |
| 2906 | info->max_lineno_offset = 0; |
| 2907 | bfd_map_over_sections (abfd, find_linenos, info); |
| 2908 | |
| 2909 | if (num_symbols > 0) |
| 2910 | { |
| 2911 | /* Read the string table. */ |
| 2912 | init_stringtab (abfd, stringtab_offset, objfile); |
| 2913 | |
| 2914 | /* Read the .debug section, if present. */ |
| 2915 | { |
| 2916 | struct bfd_section *secp; |
| 2917 | bfd_size_type length; |
| 2918 | char *debugsec = NULL; |
| 2919 | |
| 2920 | secp = bfd_get_section_by_name (abfd, ".debug"); |
| 2921 | if (secp) |
| 2922 | { |
| 2923 | length = bfd_section_size (abfd, secp); |
| 2924 | if (length) |
| 2925 | { |
| 2926 | debugsec = |
| 2927 | (char *) obstack_alloc (&objfile->objfile_obstack, length); |
| 2928 | |
| 2929 | if (!bfd_get_section_contents (abfd, secp, debugsec, |
| 2930 | (file_ptr) 0, length)) |
| 2931 | { |
| 2932 | error (_("Error reading .debug section of `%s': %s"), |
| 2933 | name, bfd_errmsg (bfd_get_error ())); |
| 2934 | } |
| 2935 | } |
| 2936 | } |
| 2937 | ((struct coff_symfile_info *) objfile->deprecated_sym_private)->debugsec = |
| 2938 | debugsec; |
| 2939 | } |
| 2940 | } |
| 2941 | |
| 2942 | /* Read the symbols. We keep them in core because we will want to |
| 2943 | access them randomly in read_symbol*. */ |
| 2944 | val = bfd_seek (abfd, symtab_offset, SEEK_SET); |
| 2945 | if (val < 0) |
| 2946 | error (_("Error reading symbols from %s: %s"), |
| 2947 | name, bfd_errmsg (bfd_get_error ())); |
| 2948 | size = coff_data (abfd)->local_symesz * num_symbols; |
| 2949 | ((struct coff_symfile_info *) objfile->deprecated_sym_private)->symtbl = |
| 2950 | obstack_alloc (&objfile->objfile_obstack, size); |
| 2951 | ((struct coff_symfile_info *) objfile->deprecated_sym_private)->symtbl_num_syms = |
| 2952 | num_symbols; |
| 2953 | |
| 2954 | val = bfd_bread (((struct coff_symfile_info *) objfile->deprecated_sym_private)->symtbl, |
| 2955 | size, abfd); |
| 2956 | if (val != size) |
| 2957 | perror_with_name (_("reading symbol table")); |
| 2958 | |
| 2959 | /* If we are reinitializing, or if we have never loaded syms yet, init */ |
| 2960 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
| 2961 | /* I'm not sure how how good num_symbols is; the rule of thumb in |
| 2962 | init_psymbol_list was developed for a.out. On the one hand, |
| 2963 | num_symbols includes auxents. On the other hand, it doesn't |
| 2964 | include N_SLINE. */ |
| 2965 | init_psymbol_list (objfile, num_symbols); |
| 2966 | |
| 2967 | free_pending_blocks (); |
| 2968 | back_to = make_cleanup (really_free_pendings, 0); |
| 2969 | |
| 2970 | init_minimal_symbol_collection (); |
| 2971 | make_cleanup_discard_minimal_symbols (); |
| 2972 | |
| 2973 | /* Now that the symbol table data of the executable file are all in core, |
| 2974 | process them and define symbols accordingly. */ |
| 2975 | |
| 2976 | scan_xcoff_symtab (objfile); |
| 2977 | |
| 2978 | /* Install any minimal symbols that have been collected as the current |
| 2979 | minimal symbols for this objfile. */ |
| 2980 | |
| 2981 | install_minimal_symbols (objfile); |
| 2982 | |
| 2983 | do_cleanups (back_to); |
| 2984 | } |
| 2985 | \f |
| 2986 | static void |
| 2987 | xcoff_symfile_offsets (struct objfile *objfile, struct section_addr_info *addrs) |
| 2988 | { |
| 2989 | asection *sect = NULL; |
| 2990 | int i; |
| 2991 | |
| 2992 | objfile->num_sections = bfd_count_sections (objfile->obfd); |
| 2993 | objfile->section_offsets = (struct section_offsets *) |
| 2994 | obstack_alloc (&objfile->objfile_obstack, |
| 2995 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
| 2996 | |
| 2997 | /* Initialize the section indexes for future use. */ |
| 2998 | sect = bfd_get_section_by_name (objfile->obfd, ".text"); |
| 2999 | if (sect) |
| 3000 | objfile->sect_index_text = sect->index; |
| 3001 | |
| 3002 | sect = bfd_get_section_by_name (objfile->obfd, ".data"); |
| 3003 | if (sect) |
| 3004 | objfile->sect_index_data = sect->index; |
| 3005 | |
| 3006 | sect = bfd_get_section_by_name (objfile->obfd, ".bss"); |
| 3007 | if (sect) |
| 3008 | objfile->sect_index_bss = sect->index; |
| 3009 | |
| 3010 | sect = bfd_get_section_by_name (objfile->obfd, ".rodata"); |
| 3011 | if (sect) |
| 3012 | objfile->sect_index_rodata = sect->index; |
| 3013 | |
| 3014 | for (i = 0; i < objfile->num_sections; ++i) |
| 3015 | { |
| 3016 | /* syms_from_objfile kindly subtracts from addr the |
| 3017 | bfd_section_vma of the .text section. This strikes me as |
| 3018 | wrong--whether the offset to be applied to symbol reading is |
| 3019 | relative to the start address of the section depends on the |
| 3020 | symbol format. In any event, this whole "addr" concept is |
| 3021 | pretty broken (it doesn't handle any section but .text |
| 3022 | sensibly), so just ignore the addr parameter and use 0. |
| 3023 | rs6000-nat.c will set the correct section offsets via |
| 3024 | objfile_relocate. */ |
| 3025 | (objfile->section_offsets)->offsets[i] = 0; |
| 3026 | } |
| 3027 | } |
| 3028 | |
| 3029 | /* Register our ability to parse symbols for xcoff BFD files. */ |
| 3030 | |
| 3031 | static struct sym_fns xcoff_sym_fns = |
| 3032 | { |
| 3033 | |
| 3034 | /* It is possible that coff and xcoff should be merged as |
| 3035 | they do have fundamental similarities (for example, the extra storage |
| 3036 | classes used for stabs could presumably be recognized in any COFF file). |
| 3037 | However, in addition to obvious things like all the csect hair, there are |
| 3038 | some subtler differences between xcoffread.c and coffread.c, notably |
| 3039 | the fact that coffread.c has no need to read in all the symbols, but |
| 3040 | xcoffread.c reads all the symbols and does in fact randomly access them |
| 3041 | (in C_BSTAT and line number processing). */ |
| 3042 | |
| 3043 | bfd_target_xcoff_flavour, |
| 3044 | |
| 3045 | xcoff_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| 3046 | xcoff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| 3047 | xcoff_initial_scan, /* sym_read: read a symbol file into symtab */ |
| 3048 | xcoff_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| 3049 | xcoff_symfile_offsets, /* sym_offsets: xlate offsets ext->int form */ |
| 3050 | default_symfile_segments, /* sym_segments: Get segment information from |
| 3051 | a file. */ |
| 3052 | aix_process_linenos, /* sym_read_linetable */ |
| 3053 | default_symfile_relocate, /* sym_relocate: Relocate a debug section. */ |
| 3054 | &psym_functions, |
| 3055 | NULL /* next: pointer to next struct sym_fns */ |
| 3056 | }; |
| 3057 | |
| 3058 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 3059 | extern initialize_file_ftype _initialize_xcoffread; |
| 3060 | |
| 3061 | void |
| 3062 | _initialize_xcoffread (void) |
| 3063 | { |
| 3064 | add_symtab_fns (&xcoff_sym_fns); |
| 3065 | } |