| 1 | /* Read AIX xcoff symbol tables and convert to internal format, for GDB. |
| 2 | Copyright (C) 1986-2017 Free Software Foundation, Inc. |
| 3 | Derived from coffread.c, dbxread.c, and a lot of hacking. |
| 4 | Contributed by IBM Corporation. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include "bfd.h" |
| 23 | |
| 24 | #include <sys/types.h> |
| 25 | #include <fcntl.h> |
| 26 | #include <ctype.h> |
| 27 | #ifdef HAVE_SYS_FILE_H |
| 28 | #include <sys/file.h> |
| 29 | #endif |
| 30 | #include <sys/stat.h> |
| 31 | |
| 32 | #include "coff/internal.h" |
| 33 | #include "libcoff.h" /* FIXME, internal data from BFD */ |
| 34 | #include "coff/xcoff.h" |
| 35 | #include "libxcoff.h" |
| 36 | #include "coff/rs6000.h" |
| 37 | #include "xcoffread.h" |
| 38 | |
| 39 | #include "symtab.h" |
| 40 | #include "gdbtypes.h" |
| 41 | /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */ |
| 42 | #include "symfile.h" |
| 43 | #include "objfiles.h" |
| 44 | #include "buildsym.h" |
| 45 | #include "stabsread.h" |
| 46 | #include "expression.h" |
| 47 | #include "complaints.h" |
| 48 | #include "psympriv.h" |
| 49 | |
| 50 | #include "gdb-stabs.h" |
| 51 | |
| 52 | /* For interface with stabsread.c. */ |
| 53 | #include "aout/stab_gnu.h" |
| 54 | |
| 55 | \f |
| 56 | /* Key for XCOFF-associated data. */ |
| 57 | |
| 58 | static const struct objfile_data *xcoff_objfile_data_key; |
| 59 | |
| 60 | /* We put a pointer to this structure in the read_symtab_private field |
| 61 | of the psymtab. */ |
| 62 | |
| 63 | struct symloc |
| 64 | { |
| 65 | |
| 66 | /* First symbol number for this file. */ |
| 67 | |
| 68 | int first_symnum; |
| 69 | |
| 70 | /* Number of symbols in the section of the symbol table devoted to |
| 71 | this file's symbols (actually, the section bracketed may contain |
| 72 | more than just this file's symbols). If numsyms is 0, the only |
| 73 | reason for this thing's existence is the dependency list. Nothing |
| 74 | else will happen when it is read in. */ |
| 75 | |
| 76 | int numsyms; |
| 77 | |
| 78 | /* Position of the start of the line number information for this |
| 79 | 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 | CORE_ADDR 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 | /* Size of a COFF symbol. I think it is always 18, so I'm not sure |
| 123 | there is any reason not to just use a #define, but might as well |
| 124 | ask BFD for the size and store it here, I guess. */ |
| 125 | |
| 126 | static unsigned local_symesz; |
| 127 | |
| 128 | struct coff_symfile_info |
| 129 | { |
| 130 | file_ptr min_lineno_offset; /* Where in file lowest line#s are. */ |
| 131 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file. */ |
| 132 | |
| 133 | /* Pointer to the string table. */ |
| 134 | char *strtbl; |
| 135 | |
| 136 | /* Pointer to debug section. */ |
| 137 | char *debugsec; |
| 138 | |
| 139 | /* Pointer to the a.out symbol table. */ |
| 140 | char *symtbl; |
| 141 | |
| 142 | /* Number of symbols in symtbl. */ |
| 143 | int symtbl_num_syms; |
| 144 | |
| 145 | /* Offset in data section to TOC anchor. */ |
| 146 | CORE_ADDR toc_offset; |
| 147 | }; |
| 148 | |
| 149 | /* Convenience macro to access the per-objfile XCOFF data. */ |
| 150 | |
| 151 | #define XCOFF_DATA(objfile) \ |
| 152 | ((struct coff_symfile_info *) objfile_data ((objfile), \ |
| 153 | xcoff_objfile_data_key)) |
| 154 | |
| 155 | /* XCOFF names for dwarf sections. There is no compressed sections. */ |
| 156 | |
| 157 | static const struct dwarf2_debug_sections dwarf2_xcoff_names = { |
| 158 | { ".dwinfo", NULL }, |
| 159 | { ".dwabrev", NULL }, |
| 160 | { ".dwline", NULL }, |
| 161 | { ".dwloc", NULL }, |
| 162 | { NULL, NULL }, /* debug_loclists */ |
| 163 | /* AIX XCOFF defines one, named DWARF section for macro debug information. |
| 164 | XLC does not generate debug_macinfo for DWARF4 and below. |
| 165 | The section is assigned to debug_macro for DWARF5 and above. */ |
| 166 | { NULL, NULL }, |
| 167 | { ".dwmac", NULL }, |
| 168 | { ".dwstr", NULL }, |
| 169 | { NULL, NULL }, /* debug_line_str */ |
| 170 | { ".dwrnges", NULL }, |
| 171 | { NULL, NULL }, /* debug_rnglists */ |
| 172 | { ".dwpbtyp", NULL }, |
| 173 | { NULL, NULL }, /* debug_addr */ |
| 174 | { ".dwframe", NULL }, |
| 175 | { NULL, NULL }, /* eh_frame */ |
| 176 | { NULL, NULL }, /* gdb_index */ |
| 177 | 23 |
| 178 | }; |
| 179 | |
| 180 | static void |
| 181 | bf_notfound_complaint (void) |
| 182 | { |
| 183 | complaint (&symfile_complaints, |
| 184 | _("line numbers off, `.bf' symbol not found")); |
| 185 | } |
| 186 | |
| 187 | static void |
| 188 | ef_complaint (int arg1) |
| 189 | { |
| 190 | complaint (&symfile_complaints, |
| 191 | _("Mismatched .ef symbol ignored starting at symnum %d"), arg1); |
| 192 | } |
| 193 | |
| 194 | static void |
| 195 | eb_complaint (int arg1) |
| 196 | { |
| 197 | complaint (&symfile_complaints, |
| 198 | _("Mismatched .eb symbol ignored starting at symnum %d"), arg1); |
| 199 | } |
| 200 | |
| 201 | static void xcoff_initial_scan (struct objfile *, symfile_add_flags); |
| 202 | |
| 203 | static void scan_xcoff_symtab (minimal_symbol_reader &, |
| 204 | struct objfile *); |
| 205 | |
| 206 | static const char *xcoff_next_symbol_text (struct objfile *); |
| 207 | |
| 208 | static void record_include_begin (struct coff_symbol *); |
| 209 | |
| 210 | static void |
| 211 | enter_line_range (struct subfile *, unsigned, unsigned, |
| 212 | CORE_ADDR, CORE_ADDR, unsigned *); |
| 213 | |
| 214 | static void init_stringtab (bfd *, file_ptr, struct objfile *); |
| 215 | |
| 216 | static void xcoff_symfile_init (struct objfile *); |
| 217 | |
| 218 | static void xcoff_new_init (struct objfile *); |
| 219 | |
| 220 | static void xcoff_symfile_finish (struct objfile *); |
| 221 | |
| 222 | static char *coff_getfilename (union internal_auxent *, struct objfile *); |
| 223 | |
| 224 | static void read_symbol (struct internal_syment *, int); |
| 225 | |
| 226 | static int read_symbol_lineno (int); |
| 227 | |
| 228 | static CORE_ADDR read_symbol_nvalue (int); |
| 229 | |
| 230 | static struct symbol *process_xcoff_symbol (struct coff_symbol *, |
| 231 | struct objfile *); |
| 232 | |
| 233 | static void read_xcoff_symtab (struct objfile *, struct partial_symtab *); |
| 234 | |
| 235 | #if 0 |
| 236 | static void add_stab_to_list (char *, struct pending_stabs **); |
| 237 | #endif |
| 238 | |
| 239 | static int compare_lte (const void *, const void *); |
| 240 | |
| 241 | static struct linetable *arrange_linetable (struct linetable *); |
| 242 | |
| 243 | static void record_include_end (struct coff_symbol *); |
| 244 | |
| 245 | static void process_linenos (CORE_ADDR, CORE_ADDR); |
| 246 | \f |
| 247 | |
| 248 | /* Translate from a COFF section number (target_index) to a SECT_OFF_* |
| 249 | code. */ |
| 250 | static int secnum_to_section (int, struct objfile *); |
| 251 | static asection *secnum_to_bfd_section (int, struct objfile *); |
| 252 | |
| 253 | struct find_targ_sec_arg |
| 254 | { |
| 255 | int targ_index; |
| 256 | int *resultp; |
| 257 | asection **bfd_sect; |
| 258 | struct objfile *objfile; |
| 259 | }; |
| 260 | |
| 261 | static void find_targ_sec (bfd *, asection *, void *); |
| 262 | |
| 263 | static void |
| 264 | find_targ_sec (bfd *abfd, asection *sect, void *obj) |
| 265 | { |
| 266 | struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj; |
| 267 | struct objfile *objfile = args->objfile; |
| 268 | |
| 269 | if (sect->target_index == args->targ_index) |
| 270 | { |
| 271 | /* This is the section. Figure out what SECT_OFF_* code it is. */ |
| 272 | if (bfd_get_section_flags (abfd, sect) & SEC_CODE) |
| 273 | *args->resultp = SECT_OFF_TEXT (objfile); |
| 274 | else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD) |
| 275 | *args->resultp = SECT_OFF_DATA (objfile); |
| 276 | else |
| 277 | *args->resultp = gdb_bfd_section_index (abfd, sect); |
| 278 | *args->bfd_sect = sect; |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | /* Search all BFD sections for the section whose target_index is |
| 283 | equal to N_SCNUM. Set *BFD_SECT to that section. The section's |
| 284 | associated index in the objfile's section_offset table is also |
| 285 | stored in *SECNUM. |
| 286 | |
| 287 | If no match is found, *BFD_SECT is set to NULL, and *SECNUM |
| 288 | is set to the text section's number. */ |
| 289 | |
| 290 | static void |
| 291 | xcoff_secnum_to_sections (int n_scnum, struct objfile *objfile, |
| 292 | asection **bfd_sect, int *secnum) |
| 293 | { |
| 294 | struct find_targ_sec_arg args; |
| 295 | |
| 296 | args.targ_index = n_scnum; |
| 297 | args.resultp = secnum; |
| 298 | args.bfd_sect = bfd_sect; |
| 299 | args.objfile = objfile; |
| 300 | |
| 301 | *bfd_sect = NULL; |
| 302 | *secnum = SECT_OFF_TEXT (objfile); |
| 303 | |
| 304 | bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); |
| 305 | } |
| 306 | |
| 307 | /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */ |
| 308 | |
| 309 | static int |
| 310 | secnum_to_section (int n_scnum, struct objfile *objfile) |
| 311 | { |
| 312 | int secnum; |
| 313 | asection *ignored; |
| 314 | |
| 315 | xcoff_secnum_to_sections (n_scnum, objfile, &ignored, &secnum); |
| 316 | return secnum; |
| 317 | } |
| 318 | |
| 319 | /* Return the BFD section that N_SCNUM points to. */ |
| 320 | |
| 321 | static asection * |
| 322 | secnum_to_bfd_section (int n_scnum, struct objfile *objfile) |
| 323 | { |
| 324 | int ignored; |
| 325 | asection *bfd_sect; |
| 326 | |
| 327 | xcoff_secnum_to_sections (n_scnum, objfile, &bfd_sect, &ignored); |
| 328 | return bfd_sect; |
| 329 | } |
| 330 | \f |
| 331 | /* add a given stab string into given stab vector. */ |
| 332 | |
| 333 | #if 0 |
| 334 | |
| 335 | static void |
| 336 | add_stab_to_list (char *stabname, struct pending_stabs **stabvector) |
| 337 | { |
| 338 | if (*stabvector == NULL) |
| 339 | { |
| 340 | *stabvector = (struct pending_stabs *) |
| 341 | xmalloc (sizeof (struct pending_stabs) + |
| 342 | INITIAL_STABVECTOR_LENGTH * sizeof (char *)); |
| 343 | (*stabvector)->count = 0; |
| 344 | (*stabvector)->length = INITIAL_STABVECTOR_LENGTH; |
| 345 | } |
| 346 | else if ((*stabvector)->count >= (*stabvector)->length) |
| 347 | { |
| 348 | (*stabvector)->length += INITIAL_STABVECTOR_LENGTH; |
| 349 | *stabvector = (struct pending_stabs *) |
| 350 | xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) + |
| 351 | (*stabvector)->length * sizeof (char *)); |
| 352 | } |
| 353 | (*stabvector)->stab[(*stabvector)->count++] = stabname; |
| 354 | } |
| 355 | |
| 356 | #endif |
| 357 | \f/* *INDENT-OFF* */ |
| 358 | /* Linenos are processed on a file-by-file basis. |
| 359 | |
| 360 | Two reasons: |
| 361 | |
| 362 | 1) xlc (IBM's native c compiler) postpones static function code |
| 363 | emission to the end of a compilation unit. This way it can |
| 364 | determine if those functions (statics) are needed or not, and |
| 365 | can do some garbage collection (I think). This makes line |
| 366 | numbers and corresponding addresses unordered, and we end up |
| 367 | with a line table like: |
| 368 | |
| 369 | |
| 370 | lineno addr |
| 371 | foo() 10 0x100 |
| 372 | 20 0x200 |
| 373 | 30 0x300 |
| 374 | |
| 375 | foo3() 70 0x400 |
| 376 | 80 0x500 |
| 377 | 90 0x600 |
| 378 | |
| 379 | static foo2() |
| 380 | 40 0x700 |
| 381 | 50 0x800 |
| 382 | 60 0x900 |
| 383 | |
| 384 | and that breaks gdb's binary search on line numbers, if the |
| 385 | above table is not sorted on line numbers. And that sort |
| 386 | should be on function based, since gcc can emit line numbers |
| 387 | like: |
| 388 | |
| 389 | 10 0x100 - for the init/test part of a for stmt. |
| 390 | 20 0x200 |
| 391 | 30 0x300 |
| 392 | 10 0x400 - for the increment part of a for stmt. |
| 393 | |
| 394 | arrange_linetable() will do this sorting. |
| 395 | |
| 396 | 2) aix symbol table might look like: |
| 397 | |
| 398 | c_file // beginning of a new file |
| 399 | .bi // beginning of include file |
| 400 | .ei // end of include file |
| 401 | .bi |
| 402 | .ei |
| 403 | |
| 404 | basically, .bi/.ei pairs do not necessarily encapsulate |
| 405 | their scope. They need to be recorded, and processed later |
| 406 | on when we come the end of the compilation unit. |
| 407 | Include table (inclTable) and process_linenos() handle |
| 408 | that. */ |
| 409 | /* *INDENT-ON* */ |
| 410 | |
| 411 | |
| 412 | |
| 413 | /* compare line table entry addresses. */ |
| 414 | |
| 415 | static int |
| 416 | compare_lte (const void *lte1p, const void *lte2p) |
| 417 | { |
| 418 | struct linetable_entry *lte1 = (struct linetable_entry *) lte1p; |
| 419 | struct linetable_entry *lte2 = (struct linetable_entry *) lte2p; |
| 420 | |
| 421 | return lte1->pc - lte2->pc; |
| 422 | } |
| 423 | |
| 424 | /* Given a line table with function entries are marked, arrange its |
| 425 | functions in ascending order and strip off function entry markers |
| 426 | and return it in a newly created table. If the old one is good |
| 427 | enough, return the old one. */ |
| 428 | /* FIXME: I think all this stuff can be replaced by just passing |
| 429 | sort_linevec = 1 to end_symtab. */ |
| 430 | |
| 431 | static struct linetable * |
| 432 | arrange_linetable (struct linetable *oldLineTb) |
| 433 | { |
| 434 | int ii, jj, newline, /* new line count */ |
| 435 | function_count; /* # of functions */ |
| 436 | |
| 437 | struct linetable_entry *fentry; /* function entry vector */ |
| 438 | int fentry_size; /* # of function entries */ |
| 439 | struct linetable *newLineTb; /* new line table */ |
| 440 | int extra_lines = 0; |
| 441 | |
| 442 | #define NUM_OF_FUNCTIONS 20 |
| 443 | |
| 444 | fentry_size = NUM_OF_FUNCTIONS; |
| 445 | fentry = XNEWVEC (struct linetable_entry, fentry_size); |
| 446 | |
| 447 | for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii) |
| 448 | { |
| 449 | if (oldLineTb->item[ii].line == 0) |
| 450 | { /* Function entry found. */ |
| 451 | if (function_count >= fentry_size) |
| 452 | { /* Make sure you have room. */ |
| 453 | fentry_size *= 2; |
| 454 | fentry = (struct linetable_entry *) |
| 455 | xrealloc (fentry, |
| 456 | fentry_size * sizeof (struct linetable_entry)); |
| 457 | } |
| 458 | fentry[function_count].line = ii; |
| 459 | fentry[function_count].pc = oldLineTb->item[ii].pc; |
| 460 | ++function_count; |
| 461 | |
| 462 | /* If the function was compiled with XLC, we may have to add an |
| 463 | extra line entry later. Reserve space for that. */ |
| 464 | if (ii + 1 < oldLineTb->nitems |
| 465 | && oldLineTb->item[ii].pc != oldLineTb->item[ii + 1].pc) |
| 466 | extra_lines++; |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | if (function_count == 0) |
| 471 | { |
| 472 | xfree (fentry); |
| 473 | return oldLineTb; |
| 474 | } |
| 475 | else if (function_count > 1) |
| 476 | qsort (fentry, function_count, |
| 477 | sizeof (struct linetable_entry), compare_lte); |
| 478 | |
| 479 | /* Allocate a new line table. */ |
| 480 | newLineTb = (struct linetable *) |
| 481 | xmalloc |
| 482 | (sizeof (struct linetable) + |
| 483 | (oldLineTb->nitems - function_count + extra_lines) * sizeof (struct linetable_entry)); |
| 484 | |
| 485 | /* If line table does not start with a function beginning, copy up until |
| 486 | a function begin. */ |
| 487 | |
| 488 | newline = 0; |
| 489 | if (oldLineTb->item[0].line != 0) |
| 490 | for (newline = 0; |
| 491 | newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline) |
| 492 | newLineTb->item[newline] = oldLineTb->item[newline]; |
| 493 | |
| 494 | /* Now copy function lines one by one. */ |
| 495 | |
| 496 | for (ii = 0; ii < function_count; ++ii) |
| 497 | { |
| 498 | /* If the function was compiled with XLC, we may have to add an |
| 499 | extra line to cover the function prologue. */ |
| 500 | jj = fentry[ii].line; |
| 501 | if (jj + 1 < oldLineTb->nitems |
| 502 | && oldLineTb->item[jj].pc != oldLineTb->item[jj + 1].pc) |
| 503 | { |
| 504 | newLineTb->item[newline] = oldLineTb->item[jj]; |
| 505 | newLineTb->item[newline].line = oldLineTb->item[jj + 1].line; |
| 506 | newline++; |
| 507 | } |
| 508 | |
| 509 | for (jj = fentry[ii].line + 1; |
| 510 | jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0; |
| 511 | ++jj, ++newline) |
| 512 | newLineTb->item[newline] = oldLineTb->item[jj]; |
| 513 | } |
| 514 | xfree (fentry); |
| 515 | /* The number of items in the line table must include these |
| 516 | extra lines which were added in case of XLC compiled functions. */ |
| 517 | newLineTb->nitems = oldLineTb->nitems - function_count + extra_lines; |
| 518 | return newLineTb; |
| 519 | } |
| 520 | |
| 521 | /* include file support: C_BINCL/C_EINCL pairs will be kept in the |
| 522 | following `IncludeChain'. At the end of each symtab (end_symtab), |
| 523 | we will determine if we should create additional symtab's to |
| 524 | represent if (the include files. */ |
| 525 | |
| 526 | |
| 527 | typedef struct _inclTable |
| 528 | { |
| 529 | char *name; /* include filename */ |
| 530 | |
| 531 | /* Offsets to the line table. end points to the last entry which is |
| 532 | part of this include file. */ |
| 533 | int begin, end; |
| 534 | |
| 535 | struct subfile *subfile; |
| 536 | unsigned funStartLine; /* Start line # of its function. */ |
| 537 | } |
| 538 | InclTable; |
| 539 | |
| 540 | #define INITIAL_INCLUDE_TABLE_LENGTH 20 |
| 541 | static InclTable *inclTable; /* global include table */ |
| 542 | static int inclIndx; /* last entry to table */ |
| 543 | static int inclLength; /* table length */ |
| 544 | static int inclDepth; /* nested include depth */ |
| 545 | |
| 546 | static void allocate_include_entry (void); |
| 547 | |
| 548 | static void |
| 549 | record_include_begin (struct coff_symbol *cs) |
| 550 | { |
| 551 | if (inclDepth) |
| 552 | { |
| 553 | /* In xcoff, we assume include files cannot be nested (not in .c files |
| 554 | of course, but in corresponding .s files.). */ |
| 555 | |
| 556 | /* This can happen with old versions of GCC. |
| 557 | GCC 2.3.3-930426 does not exhibit this on a test case which |
| 558 | a user said produced the message for him. */ |
| 559 | complaint (&symfile_complaints, _("Nested C_BINCL symbols")); |
| 560 | } |
| 561 | ++inclDepth; |
| 562 | |
| 563 | allocate_include_entry (); |
| 564 | |
| 565 | inclTable[inclIndx].name = cs->c_name; |
| 566 | inclTable[inclIndx].begin = cs->c_value; |
| 567 | } |
| 568 | |
| 569 | static void |
| 570 | record_include_end (struct coff_symbol *cs) |
| 571 | { |
| 572 | InclTable *pTbl; |
| 573 | |
| 574 | if (inclDepth == 0) |
| 575 | { |
| 576 | complaint (&symfile_complaints, _("Mismatched C_BINCL/C_EINCL pair")); |
| 577 | } |
| 578 | |
| 579 | allocate_include_entry (); |
| 580 | |
| 581 | pTbl = &inclTable[inclIndx]; |
| 582 | pTbl->end = cs->c_value; |
| 583 | |
| 584 | --inclDepth; |
| 585 | ++inclIndx; |
| 586 | } |
| 587 | |
| 588 | static void |
| 589 | allocate_include_entry (void) |
| 590 | { |
| 591 | if (inclTable == NULL) |
| 592 | { |
| 593 | inclTable = XCNEWVEC (InclTable, INITIAL_INCLUDE_TABLE_LENGTH); |
| 594 | inclLength = INITIAL_INCLUDE_TABLE_LENGTH; |
| 595 | inclIndx = 0; |
| 596 | } |
| 597 | else if (inclIndx >= inclLength) |
| 598 | { |
| 599 | inclLength += INITIAL_INCLUDE_TABLE_LENGTH; |
| 600 | inclTable = XRESIZEVEC (InclTable, inclTable, inclLength); |
| 601 | memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH, |
| 602 | '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | /* Global variable to pass the psymtab down to all the routines involved |
| 607 | in psymtab to symtab processing. */ |
| 608 | static struct partial_symtab *this_symtab_psymtab; |
| 609 | |
| 610 | /* Objfile related to this_symtab_psymtab; set at the same time. */ |
| 611 | static struct objfile *this_symtab_objfile; |
| 612 | |
| 613 | /* given the start and end addresses of a compilation unit (or a csect, |
| 614 | at times) process its lines and create appropriate line vectors. */ |
| 615 | |
| 616 | static void |
| 617 | process_linenos (CORE_ADDR start, CORE_ADDR end) |
| 618 | { |
| 619 | int offset, ii; |
| 620 | file_ptr max_offset |
| 621 | = XCOFF_DATA (this_symtab_objfile)->max_lineno_offset; |
| 622 | |
| 623 | /* subfile structure for the main compilation unit. */ |
| 624 | struct subfile main_subfile; |
| 625 | |
| 626 | /* In the main source file, any time we see a function entry, we |
| 627 | reset this variable to function's absolute starting line number. |
| 628 | All the following line numbers in the function are relative to |
| 629 | this, and we record absolute line numbers in record_line(). */ |
| 630 | |
| 631 | unsigned int main_source_baseline = 0; |
| 632 | |
| 633 | unsigned *firstLine; |
| 634 | |
| 635 | offset = |
| 636 | ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off; |
| 637 | if (offset == 0) |
| 638 | goto return_after_cleanup; |
| 639 | |
| 640 | memset (&main_subfile, '\0', sizeof (main_subfile)); |
| 641 | |
| 642 | if (inclIndx == 0) |
| 643 | /* All source lines were in the main source file. None in include |
| 644 | files. */ |
| 645 | |
| 646 | enter_line_range (&main_subfile, offset, 0, start, end, |
| 647 | &main_source_baseline); |
| 648 | |
| 649 | else |
| 650 | { |
| 651 | /* There was source with line numbers in include files. */ |
| 652 | |
| 653 | int linesz = |
| 654 | coff_data (this_symtab_objfile->obfd)->local_linesz; |
| 655 | main_source_baseline = 0; |
| 656 | |
| 657 | for (ii = 0; ii < inclIndx; ++ii) |
| 658 | { |
| 659 | struct subfile *tmpSubfile; |
| 660 | |
| 661 | /* If there is main file source before include file, enter it. */ |
| 662 | if (offset < inclTable[ii].begin) |
| 663 | { |
| 664 | enter_line_range |
| 665 | (&main_subfile, offset, inclTable[ii].begin - linesz, |
| 666 | start, 0, &main_source_baseline); |
| 667 | } |
| 668 | |
| 669 | if (strcmp (inclTable[ii].name, get_last_source_file ()) == 0) |
| 670 | { |
| 671 | /* The entry in the include table refers to the main source |
| 672 | file. Add the lines to the main subfile. */ |
| 673 | |
| 674 | main_source_baseline = inclTable[ii].funStartLine; |
| 675 | enter_line_range |
| 676 | (&main_subfile, inclTable[ii].begin, inclTable[ii].end, |
| 677 | start, 0, &main_source_baseline); |
| 678 | inclTable[ii].subfile = &main_subfile; |
| 679 | } |
| 680 | else |
| 681 | { |
| 682 | /* Have a new subfile for the include file. */ |
| 683 | |
| 684 | tmpSubfile = inclTable[ii].subfile = XNEW (struct subfile); |
| 685 | |
| 686 | memset (tmpSubfile, '\0', sizeof (struct subfile)); |
| 687 | firstLine = &(inclTable[ii].funStartLine); |
| 688 | |
| 689 | /* Enter include file's lines now. */ |
| 690 | enter_line_range (tmpSubfile, inclTable[ii].begin, |
| 691 | inclTable[ii].end, start, 0, firstLine); |
| 692 | } |
| 693 | |
| 694 | if (offset <= inclTable[ii].end) |
| 695 | offset = inclTable[ii].end + linesz; |
| 696 | } |
| 697 | |
| 698 | /* All the include files' line have been processed at this point. Now, |
| 699 | enter remaining lines of the main file, if any left. */ |
| 700 | if (offset < max_offset + 1 - linesz) |
| 701 | { |
| 702 | enter_line_range (&main_subfile, offset, 0, start, end, |
| 703 | &main_source_baseline); |
| 704 | } |
| 705 | } |
| 706 | |
| 707 | /* Process main file's line numbers. */ |
| 708 | if (main_subfile.line_vector) |
| 709 | { |
| 710 | struct linetable *lineTb, *lv; |
| 711 | |
| 712 | lv = main_subfile.line_vector; |
| 713 | |
| 714 | /* Line numbers are not necessarily ordered. xlc compilation will |
| 715 | put static function to the end. */ |
| 716 | |
| 717 | lineTb = arrange_linetable (lv); |
| 718 | if (lv == lineTb) |
| 719 | { |
| 720 | current_subfile->line_vector = (struct linetable *) |
| 721 | xrealloc (lv, (sizeof (struct linetable) |
| 722 | + lv->nitems * sizeof (struct linetable_entry))); |
| 723 | } |
| 724 | else |
| 725 | { |
| 726 | xfree (lv); |
| 727 | current_subfile->line_vector = lineTb; |
| 728 | } |
| 729 | |
| 730 | current_subfile->line_vector_length = |
| 731 | current_subfile->line_vector->nitems; |
| 732 | } |
| 733 | |
| 734 | /* Now, process included files' line numbers. */ |
| 735 | |
| 736 | for (ii = 0; ii < inclIndx; ++ii) |
| 737 | { |
| 738 | if (inclTable[ii].subfile != ((struct subfile *) &main_subfile) |
| 739 | && (inclTable[ii].subfile)->line_vector) /* Useless if!!! |
| 740 | FIXMEmgo */ |
| 741 | { |
| 742 | struct linetable *lineTb, *lv; |
| 743 | |
| 744 | lv = (inclTable[ii].subfile)->line_vector; |
| 745 | |
| 746 | /* Line numbers are not necessarily ordered. xlc compilation will |
| 747 | put static function to the end. */ |
| 748 | |
| 749 | lineTb = arrange_linetable (lv); |
| 750 | |
| 751 | push_subfile (); |
| 752 | |
| 753 | /* For the same include file, we might want to have more than one |
| 754 | subfile. This happens if we have something like: |
| 755 | |
| 756 | ...... |
| 757 | #include "foo.h" |
| 758 | ...... |
| 759 | #include "foo.h" |
| 760 | ...... |
| 761 | |
| 762 | while foo.h including code in it. (stupid but possible) |
| 763 | Since start_subfile() looks at the name and uses an |
| 764 | existing one if finds, we need to provide a fake name and |
| 765 | fool it. */ |
| 766 | |
| 767 | #if 0 |
| 768 | start_subfile (inclTable[ii].name); |
| 769 | #else |
| 770 | { |
| 771 | /* Pick a fake name that will produce the same results as this |
| 772 | one when passed to deduce_language_from_filename. Kludge on |
| 773 | top of kludge. */ |
| 774 | const char *fakename = strrchr (inclTable[ii].name, '.'); |
| 775 | |
| 776 | if (fakename == NULL) |
| 777 | fakename = " ?"; |
| 778 | start_subfile (fakename); |
| 779 | xfree (current_subfile->name); |
| 780 | } |
| 781 | current_subfile->name = xstrdup (inclTable[ii].name); |
| 782 | #endif |
| 783 | |
| 784 | if (lv == lineTb) |
| 785 | { |
| 786 | current_subfile->line_vector = |
| 787 | (struct linetable *) xrealloc |
| 788 | (lv, (sizeof (struct linetable) |
| 789 | + lv->nitems * sizeof (struct linetable_entry))); |
| 790 | |
| 791 | } |
| 792 | else |
| 793 | { |
| 794 | xfree (lv); |
| 795 | current_subfile->line_vector = lineTb; |
| 796 | } |
| 797 | |
| 798 | current_subfile->line_vector_length = |
| 799 | current_subfile->line_vector->nitems; |
| 800 | start_subfile (pop_subfile ()); |
| 801 | } |
| 802 | } |
| 803 | |
| 804 | return_after_cleanup: |
| 805 | |
| 806 | /* We don't want to keep alloc/free'ing the global include file table. */ |
| 807 | inclIndx = 0; |
| 808 | } |
| 809 | |
| 810 | static void |
| 811 | aix_process_linenos (struct objfile *objfile) |
| 812 | { |
| 813 | /* There is no linenos to read if there are only dwarf info. */ |
| 814 | if (this_symtab_psymtab == NULL) |
| 815 | return; |
| 816 | |
| 817 | /* Process line numbers and enter them into line vector. */ |
| 818 | process_linenos (last_source_start_addr, cur_src_end_addr); |
| 819 | } |
| 820 | |
| 821 | |
| 822 | /* Enter a given range of lines into the line vector. |
| 823 | can be called in the following two ways: |
| 824 | enter_line_range (subfile, beginoffset, endoffset, |
| 825 | startaddr, 0, firstLine) or |
| 826 | enter_line_range (subfile, beginoffset, 0, |
| 827 | startaddr, endaddr, firstLine) |
| 828 | |
| 829 | endoffset points to the last line table entry that we should pay |
| 830 | attention to. */ |
| 831 | |
| 832 | static void |
| 833 | enter_line_range (struct subfile *subfile, unsigned beginoffset, |
| 834 | unsigned endoffset, /* offsets to line table */ |
| 835 | CORE_ADDR startaddr, /* offsets to line table */ |
| 836 | CORE_ADDR endaddr, unsigned *firstLine) |
| 837 | { |
| 838 | struct objfile *objfile = this_symtab_objfile; |
| 839 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 840 | unsigned int curoffset; |
| 841 | CORE_ADDR addr; |
| 842 | void *ext_lnno; |
| 843 | struct internal_lineno int_lnno; |
| 844 | unsigned int limit_offset; |
| 845 | bfd *abfd; |
| 846 | int linesz; |
| 847 | |
| 848 | if (endoffset == 0 && startaddr == 0 && endaddr == 0) |
| 849 | return; |
| 850 | curoffset = beginoffset; |
| 851 | limit_offset = XCOFF_DATA (objfile)->max_lineno_offset; |
| 852 | |
| 853 | if (endoffset != 0) |
| 854 | { |
| 855 | if (endoffset >= limit_offset) |
| 856 | { |
| 857 | complaint (&symfile_complaints, |
| 858 | _("Bad line table offset in C_EINCL directive")); |
| 859 | return; |
| 860 | } |
| 861 | limit_offset = endoffset; |
| 862 | } |
| 863 | else |
| 864 | limit_offset -= 1; |
| 865 | |
| 866 | abfd = objfile->obfd; |
| 867 | linesz = coff_data (abfd)->local_linesz; |
| 868 | ext_lnno = alloca (linesz); |
| 869 | |
| 870 | while (curoffset <= limit_offset) |
| 871 | { |
| 872 | bfd_seek (abfd, curoffset, SEEK_SET); |
| 873 | bfd_bread (ext_lnno, linesz, abfd); |
| 874 | bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno); |
| 875 | |
| 876 | /* Find the address this line represents. */ |
| 877 | addr = (int_lnno.l_lnno |
| 878 | ? int_lnno.l_addr.l_paddr |
| 879 | : read_symbol_nvalue (int_lnno.l_addr.l_symndx)); |
| 880 | addr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 881 | |
| 882 | if (addr < startaddr || (endaddr && addr >= endaddr)) |
| 883 | return; |
| 884 | |
| 885 | if (int_lnno.l_lnno == 0) |
| 886 | { |
| 887 | *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx); |
| 888 | record_line (subfile, 0, gdbarch_addr_bits_remove (gdbarch, addr)); |
| 889 | --(*firstLine); |
| 890 | } |
| 891 | else |
| 892 | record_line (subfile, *firstLine + int_lnno.l_lnno, |
| 893 | gdbarch_addr_bits_remove (gdbarch, addr)); |
| 894 | curoffset += linesz; |
| 895 | } |
| 896 | } |
| 897 | |
| 898 | |
| 899 | /* Save the vital information for use when closing off the current file. |
| 900 | NAME is the file name the symbols came from, START_ADDR is the first |
| 901 | text address for the file, and SIZE is the number of bytes of text. */ |
| 902 | |
| 903 | #define complete_symtab(name, start_addr) { \ |
| 904 | set_last_source_file (name); \ |
| 905 | last_source_start_addr = start_addr; \ |
| 906 | } |
| 907 | |
| 908 | |
| 909 | /* Refill the symbol table input buffer |
| 910 | and set the variables that control fetching entries from it. |
| 911 | Reports an error if no data available. |
| 912 | This function can read past the end of the symbol table |
| 913 | (into the string table) but this does no harm. */ |
| 914 | |
| 915 | /* Create a new minimal symbol (using record_with_info). |
| 916 | |
| 917 | Creation of all new minimal symbols should go through this function |
| 918 | rather than calling the various record functions in order |
| 919 | to make sure that all symbol addresses get properly relocated. |
| 920 | |
| 921 | Arguments are: |
| 922 | |
| 923 | NAME - the symbol's name (but if NAME starts with a period, that |
| 924 | leading period is discarded). |
| 925 | ADDRESS - the symbol's address, prior to relocation. This function |
| 926 | relocates the address before recording the minimal symbol. |
| 927 | MS_TYPE - the symbol's type. |
| 928 | N_SCNUM - the symbol's XCOFF section number. |
| 929 | OBJFILE - the objfile associated with the minimal symbol. */ |
| 930 | |
| 931 | static void |
| 932 | record_minimal_symbol (minimal_symbol_reader &reader, |
| 933 | const char *name, CORE_ADDR address, |
| 934 | enum minimal_symbol_type ms_type, |
| 935 | int n_scnum, |
| 936 | struct objfile *objfile) |
| 937 | { |
| 938 | if (name[0] == '.') |
| 939 | ++name; |
| 940 | |
| 941 | reader.record_with_info (name, address, ms_type, |
| 942 | secnum_to_section (n_scnum, objfile)); |
| 943 | } |
| 944 | |
| 945 | /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be |
| 946 | nested. At any given time, a symbol can only be in one static block. |
| 947 | This is the base address of current static block, zero if non exists. */ |
| 948 | |
| 949 | static int static_block_base = 0; |
| 950 | |
| 951 | /* Section number for the current static block. */ |
| 952 | |
| 953 | static int static_block_section = -1; |
| 954 | |
| 955 | /* true if space for symbol name has been allocated. */ |
| 956 | |
| 957 | static int symname_alloced = 0; |
| 958 | |
| 959 | /* Next symbol to read. Pointer into raw seething symbol table. */ |
| 960 | |
| 961 | static char *raw_symbol; |
| 962 | |
| 963 | /* This is the function which stabsread.c calls to get symbol |
| 964 | continuations. */ |
| 965 | |
| 966 | static const char * |
| 967 | xcoff_next_symbol_text (struct objfile *objfile) |
| 968 | { |
| 969 | struct internal_syment symbol; |
| 970 | const char *retval; |
| 971 | |
| 972 | /* FIXME: is this the same as the passed arg? */ |
| 973 | if (this_symtab_objfile) |
| 974 | objfile = this_symtab_objfile; |
| 975 | |
| 976 | bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol); |
| 977 | if (symbol.n_zeroes) |
| 978 | { |
| 979 | complaint (&symfile_complaints, _("Unexpected symbol continuation")); |
| 980 | |
| 981 | /* Return something which points to '\0' and hope the symbol reading |
| 982 | code does something reasonable. */ |
| 983 | retval = ""; |
| 984 | } |
| 985 | else if (symbol.n_sclass & 0x80) |
| 986 | { |
| 987 | retval = XCOFF_DATA (objfile)->debugsec + symbol.n_offset; |
| 988 | raw_symbol += coff_data (objfile->obfd)->local_symesz; |
| 989 | ++symnum; |
| 990 | } |
| 991 | else |
| 992 | { |
| 993 | complaint (&symfile_complaints, _("Unexpected symbol continuation")); |
| 994 | |
| 995 | /* Return something which points to '\0' and hope the symbol reading |
| 996 | code does something reasonable. */ |
| 997 | retval = ""; |
| 998 | } |
| 999 | return retval; |
| 1000 | } |
| 1001 | |
| 1002 | /* Read symbols for a given partial symbol table. */ |
| 1003 | |
| 1004 | static void |
| 1005 | read_xcoff_symtab (struct objfile *objfile, struct partial_symtab *pst) |
| 1006 | { |
| 1007 | bfd *abfd = objfile->obfd; |
| 1008 | char *raw_auxptr; /* Pointer to first raw aux entry for sym. */ |
| 1009 | struct coff_symfile_info *xcoff = XCOFF_DATA (objfile); |
| 1010 | char *strtbl = xcoff->strtbl; |
| 1011 | char *debugsec = xcoff->debugsec; |
| 1012 | const char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF"; |
| 1013 | |
| 1014 | struct internal_syment symbol[1]; |
| 1015 | union internal_auxent main_aux; |
| 1016 | struct coff_symbol cs[1]; |
| 1017 | CORE_ADDR file_start_addr = 0; |
| 1018 | CORE_ADDR file_end_addr = 0; |
| 1019 | |
| 1020 | int next_file_symnum = -1; |
| 1021 | unsigned int max_symnum; |
| 1022 | int just_started = 1; |
| 1023 | int depth = 0; |
| 1024 | CORE_ADDR fcn_start_addr = 0; |
| 1025 | |
| 1026 | struct coff_symbol fcn_stab_saved = { 0 }; |
| 1027 | |
| 1028 | /* fcn_cs_saved is global because process_xcoff_symbol needs it. */ |
| 1029 | union internal_auxent fcn_aux_saved = main_aux; |
| 1030 | struct context_stack *newobj; |
| 1031 | |
| 1032 | const char *filestring = pst->filename; /* Name of the current file. */ |
| 1033 | |
| 1034 | const char *last_csect_name; /* Last seen csect's name. */ |
| 1035 | |
| 1036 | this_symtab_psymtab = pst; |
| 1037 | this_symtab_objfile = objfile; |
| 1038 | |
| 1039 | /* Get the appropriate COFF "constants" related to the file we're |
| 1040 | handling. */ |
| 1041 | local_symesz = coff_data (abfd)->local_symesz; |
| 1042 | |
| 1043 | set_last_source_file (NULL); |
| 1044 | last_csect_name = 0; |
| 1045 | |
| 1046 | start_stabs (); |
| 1047 | start_symtab (objfile, filestring, (char *) NULL, file_start_addr); |
| 1048 | record_debugformat (debugfmt); |
| 1049 | symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum; |
| 1050 | max_symnum = |
| 1051 | symnum + ((struct symloc *) pst->read_symtab_private)->numsyms; |
| 1052 | first_object_file_end = 0; |
| 1053 | |
| 1054 | raw_symbol = xcoff->symtbl + symnum * local_symesz; |
| 1055 | |
| 1056 | while (symnum < max_symnum) |
| 1057 | { |
| 1058 | QUIT; /* make this command interruptable. */ |
| 1059 | |
| 1060 | /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */ |
| 1061 | /* read one symbol into `cs' structure. After processing the |
| 1062 | whole symbol table, only string table will be kept in memory, |
| 1063 | symbol table and debug section of xcoff will be freed. Thus |
| 1064 | we can mark symbols with names in string table as |
| 1065 | `alloced'. */ |
| 1066 | { |
| 1067 | int ii; |
| 1068 | |
| 1069 | /* Swap and align the symbol into a reasonable C structure. */ |
| 1070 | bfd_coff_swap_sym_in (abfd, raw_symbol, symbol); |
| 1071 | |
| 1072 | cs->c_symnum = symnum; |
| 1073 | cs->c_naux = symbol->n_numaux; |
| 1074 | if (symbol->n_zeroes) |
| 1075 | { |
| 1076 | symname_alloced = 0; |
| 1077 | /* We must use the original, unswapped, name here so the name field |
| 1078 | pointed to by cs->c_name will persist throughout xcoffread. If |
| 1079 | we use the new field, it gets overwritten for each symbol. */ |
| 1080 | cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name; |
| 1081 | /* If it's exactly E_SYMNMLEN characters long it isn't |
| 1082 | '\0'-terminated. */ |
| 1083 | if (cs->c_name[E_SYMNMLEN - 1] != '\0') |
| 1084 | { |
| 1085 | char *p; |
| 1086 | |
| 1087 | p = (char *) obstack_alloc (&objfile->objfile_obstack, |
| 1088 | E_SYMNMLEN + 1); |
| 1089 | strncpy (p, cs->c_name, E_SYMNMLEN); |
| 1090 | p[E_SYMNMLEN] = '\0'; |
| 1091 | cs->c_name = p; |
| 1092 | symname_alloced = 1; |
| 1093 | } |
| 1094 | } |
| 1095 | else if (symbol->n_sclass & 0x80) |
| 1096 | { |
| 1097 | cs->c_name = debugsec + symbol->n_offset; |
| 1098 | symname_alloced = 0; |
| 1099 | } |
| 1100 | else |
| 1101 | { |
| 1102 | /* in string table */ |
| 1103 | cs->c_name = strtbl + (int) symbol->n_offset; |
| 1104 | symname_alloced = 1; |
| 1105 | } |
| 1106 | cs->c_value = symbol->n_value; |
| 1107 | cs->c_sclass = symbol->n_sclass; |
| 1108 | cs->c_secnum = symbol->n_scnum; |
| 1109 | cs->c_type = (unsigned) symbol->n_type; |
| 1110 | |
| 1111 | raw_symbol += local_symesz; |
| 1112 | ++symnum; |
| 1113 | |
| 1114 | /* Save addr of first aux entry. */ |
| 1115 | raw_auxptr = raw_symbol; |
| 1116 | |
| 1117 | /* Skip all the auxents associated with this symbol. */ |
| 1118 | for (ii = symbol->n_numaux; ii; --ii) |
| 1119 | { |
| 1120 | raw_symbol += coff_data (abfd)->local_auxesz; |
| 1121 | ++symnum; |
| 1122 | } |
| 1123 | } |
| 1124 | |
| 1125 | /* if symbol name starts with ".$" or "$", ignore it. */ |
| 1126 | if (cs->c_name[0] == '$' |
| 1127 | || (cs->c_name[1] == '$' && cs->c_name[0] == '.')) |
| 1128 | continue; |
| 1129 | |
| 1130 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) |
| 1131 | { |
| 1132 | if (get_last_source_file ()) |
| 1133 | { |
| 1134 | pst->compunit_symtab = end_symtab (cur_src_end_addr, |
| 1135 | SECT_OFF_TEXT (objfile)); |
| 1136 | end_stabs (); |
| 1137 | } |
| 1138 | |
| 1139 | start_stabs (); |
| 1140 | start_symtab (objfile, "_globals_", (char *) NULL, (CORE_ADDR) 0); |
| 1141 | record_debugformat (debugfmt); |
| 1142 | cur_src_end_addr = first_object_file_end; |
| 1143 | /* Done with all files, everything from here on is globals. */ |
| 1144 | } |
| 1145 | |
| 1146 | if (cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT || |
| 1147 | cs->c_sclass == C_WEAKEXT) |
| 1148 | { |
| 1149 | /* Dealing with a symbol with a csect entry. */ |
| 1150 | |
| 1151 | #define CSECT(PP) ((PP)->x_csect) |
| 1152 | #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l) |
| 1153 | #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp)) |
| 1154 | #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp)) |
| 1155 | #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas) |
| 1156 | |
| 1157 | /* Convert the auxent to something we can access. |
| 1158 | XCOFF can have more than one auxiliary entries. |
| 1159 | |
| 1160 | Actual functions will have two auxiliary entries, one to have the |
| 1161 | function size and other to have the smtype/smclass (LD/PR). |
| 1162 | |
| 1163 | c_type value of main symbol table will be set only in case of |
| 1164 | C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols. |
| 1165 | Bit 10 of type is set if symbol is a function, ie the value is set |
| 1166 | to 32(0x20). So we need to read the first function auxiliay entry |
| 1167 | which contains the size. */ |
| 1168 | if (cs->c_naux > 1 && ISFCN (cs->c_type)) |
| 1169 | { |
| 1170 | /* a function entry point. */ |
| 1171 | |
| 1172 | fcn_start_addr = cs->c_value; |
| 1173 | |
| 1174 | /* save the function header info, which will be used |
| 1175 | when `.bf' is seen. */ |
| 1176 | fcn_cs_saved = *cs; |
| 1177 | |
| 1178 | /* Convert the auxent to something we can access. */ |
| 1179 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1180 | 0, cs->c_naux, &fcn_aux_saved); |
| 1181 | continue; |
| 1182 | } |
| 1183 | /* Read the csect auxiliary header, which is always the last by |
| 1184 | onvention. */ |
| 1185 | bfd_coff_swap_aux_in (abfd, |
| 1186 | raw_auxptr |
| 1187 | + ((coff_data (abfd)->local_symesz) |
| 1188 | * (cs->c_naux - 1)), |
| 1189 | cs->c_type, cs->c_sclass, |
| 1190 | cs->c_naux - 1, cs->c_naux, |
| 1191 | &main_aux); |
| 1192 | |
| 1193 | switch (CSECT_SMTYP (&main_aux)) |
| 1194 | { |
| 1195 | |
| 1196 | case XTY_ER: |
| 1197 | /* Ignore all external references. */ |
| 1198 | continue; |
| 1199 | |
| 1200 | case XTY_SD: |
| 1201 | /* A section description. */ |
| 1202 | { |
| 1203 | switch (CSECT_SCLAS (&main_aux)) |
| 1204 | { |
| 1205 | |
| 1206 | case XMC_PR: |
| 1207 | { |
| 1208 | |
| 1209 | /* A program csect is seen. We have to allocate one |
| 1210 | symbol table for each program csect. Normally gdb |
| 1211 | prefers one symtab for each source file. In case |
| 1212 | of AIX, one source file might include more than one |
| 1213 | [PR] csect, and they don't have to be adjacent in |
| 1214 | terms of the space they occupy in memory. Thus, one |
| 1215 | single source file might get fragmented in the |
| 1216 | memory and gdb's file start and end address |
| 1217 | approach does not work! GCC (and I think xlc) seem |
| 1218 | to put all the code in the unnamed program csect. */ |
| 1219 | |
| 1220 | if (last_csect_name) |
| 1221 | { |
| 1222 | complete_symtab (filestring, file_start_addr); |
| 1223 | cur_src_end_addr = file_end_addr; |
| 1224 | end_symtab (file_end_addr, SECT_OFF_TEXT (objfile)); |
| 1225 | end_stabs (); |
| 1226 | start_stabs (); |
| 1227 | /* Give all csects for this source file the same |
| 1228 | name. */ |
| 1229 | start_symtab (objfile, filestring, NULL, |
| 1230 | (CORE_ADDR) 0); |
| 1231 | record_debugformat (debugfmt); |
| 1232 | } |
| 1233 | |
| 1234 | /* If this is the very first csect seen, |
| 1235 | basically `__start'. */ |
| 1236 | if (just_started) |
| 1237 | { |
| 1238 | first_object_file_end |
| 1239 | = cs->c_value + CSECT_LEN (&main_aux); |
| 1240 | just_started = 0; |
| 1241 | } |
| 1242 | |
| 1243 | file_start_addr = |
| 1244 | cs->c_value + ANOFFSET (objfile->section_offsets, |
| 1245 | SECT_OFF_TEXT (objfile)); |
| 1246 | file_end_addr = file_start_addr + CSECT_LEN (&main_aux); |
| 1247 | |
| 1248 | if (cs->c_name && (cs->c_name[0] == '.' || cs->c_name[0] == '@')) |
| 1249 | last_csect_name = cs->c_name; |
| 1250 | } |
| 1251 | continue; |
| 1252 | |
| 1253 | /* All other symbols are put into the minimal symbol |
| 1254 | table only. */ |
| 1255 | |
| 1256 | case XMC_RW: |
| 1257 | continue; |
| 1258 | |
| 1259 | case XMC_TC0: |
| 1260 | continue; |
| 1261 | |
| 1262 | case XMC_TC: |
| 1263 | continue; |
| 1264 | |
| 1265 | default: |
| 1266 | /* Ignore the symbol. */ |
| 1267 | continue; |
| 1268 | } |
| 1269 | } |
| 1270 | break; |
| 1271 | |
| 1272 | case XTY_LD: |
| 1273 | |
| 1274 | switch (CSECT_SCLAS (&main_aux)) |
| 1275 | { |
| 1276 | /* We never really come to this part as this case has been |
| 1277 | handled in ISFCN check above. |
| 1278 | This and other cases of XTY_LD are kept just for |
| 1279 | reference. */ |
| 1280 | case XMC_PR: |
| 1281 | continue; |
| 1282 | |
| 1283 | case XMC_GL: |
| 1284 | /* shared library function trampoline code entry point. */ |
| 1285 | continue; |
| 1286 | |
| 1287 | case XMC_DS: |
| 1288 | /* The symbols often have the same names as debug symbols for |
| 1289 | functions, and confuse lookup_symbol. */ |
| 1290 | continue; |
| 1291 | |
| 1292 | default: |
| 1293 | /* xlc puts each variable in a separate csect, so we get |
| 1294 | an XTY_SD for each variable. But gcc puts several |
| 1295 | variables in a csect, so that each variable only gets |
| 1296 | an XTY_LD. This will typically be XMC_RW; I suspect |
| 1297 | XMC_RO and XMC_BS might be possible too. |
| 1298 | These variables are put in the minimal symbol table |
| 1299 | only. */ |
| 1300 | continue; |
| 1301 | } |
| 1302 | break; |
| 1303 | |
| 1304 | case XTY_CM: |
| 1305 | /* Common symbols are put into the minimal symbol table only. */ |
| 1306 | continue; |
| 1307 | |
| 1308 | default: |
| 1309 | break; |
| 1310 | } |
| 1311 | } |
| 1312 | |
| 1313 | switch (cs->c_sclass) |
| 1314 | { |
| 1315 | case C_FILE: |
| 1316 | |
| 1317 | /* c_value field contains symnum of next .file entry in table |
| 1318 | or symnum of first global after last .file. */ |
| 1319 | |
| 1320 | next_file_symnum = cs->c_value; |
| 1321 | |
| 1322 | /* Complete symbol table for last object file containing |
| 1323 | debugging information. */ |
| 1324 | |
| 1325 | /* Whether or not there was a csect in the previous file, we |
| 1326 | have to call `end_stabs' and `start_stabs' to reset |
| 1327 | type_vector, line_vector, etc. structures. */ |
| 1328 | |
| 1329 | complete_symtab (filestring, file_start_addr); |
| 1330 | cur_src_end_addr = file_end_addr; |
| 1331 | end_symtab (file_end_addr, SECT_OFF_TEXT (objfile)); |
| 1332 | end_stabs (); |
| 1333 | |
| 1334 | /* XCOFF, according to the AIX 3.2 documentation, puts the |
| 1335 | filename in cs->c_name. But xlc 1.3.0.2 has decided to |
| 1336 | do things the standard COFF way and put it in the auxent. |
| 1337 | We use the auxent if the symbol is ".file" and an auxent |
| 1338 | exists, otherwise use the symbol itself. Simple |
| 1339 | enough. */ |
| 1340 | if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0) |
| 1341 | { |
| 1342 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1343 | 0, cs->c_naux, &main_aux); |
| 1344 | filestring = coff_getfilename (&main_aux, objfile); |
| 1345 | } |
| 1346 | else |
| 1347 | filestring = cs->c_name; |
| 1348 | |
| 1349 | start_stabs (); |
| 1350 | start_symtab (objfile, filestring, (char *) NULL, (CORE_ADDR) 0); |
| 1351 | record_debugformat (debugfmt); |
| 1352 | last_csect_name = 0; |
| 1353 | |
| 1354 | /* reset file start and end addresses. A compilation unit |
| 1355 | with no text (only data) should have zero file |
| 1356 | boundaries. */ |
| 1357 | file_start_addr = file_end_addr = 0; |
| 1358 | break; |
| 1359 | |
| 1360 | case C_FUN: |
| 1361 | fcn_stab_saved = *cs; |
| 1362 | break; |
| 1363 | |
| 1364 | case C_FCN: |
| 1365 | if (strcmp (cs->c_name, ".bf") == 0) |
| 1366 | { |
| 1367 | CORE_ADDR off = ANOFFSET (objfile->section_offsets, |
| 1368 | SECT_OFF_TEXT (objfile)); |
| 1369 | |
| 1370 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1371 | 0, cs->c_naux, &main_aux); |
| 1372 | |
| 1373 | within_function = 1; |
| 1374 | |
| 1375 | newobj = push_context (0, fcn_start_addr + off); |
| 1376 | |
| 1377 | newobj->name = define_symbol |
| 1378 | (fcn_cs_saved.c_value + off, |
| 1379 | fcn_stab_saved.c_name, 0, 0, objfile); |
| 1380 | if (newobj->name != NULL) |
| 1381 | SYMBOL_SECTION (newobj->name) = SECT_OFF_TEXT (objfile); |
| 1382 | } |
| 1383 | else if (strcmp (cs->c_name, ".ef") == 0) |
| 1384 | { |
| 1385 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1386 | 0, cs->c_naux, &main_aux); |
| 1387 | |
| 1388 | /* The value of .ef is the address of epilogue code; |
| 1389 | not useful for gdb. */ |
| 1390 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno |
| 1391 | contains number of lines to '}' */ |
| 1392 | |
| 1393 | if (context_stack_depth <= 0) |
| 1394 | { /* We attempted to pop an empty context stack. */ |
| 1395 | ef_complaint (cs->c_symnum); |
| 1396 | within_function = 0; |
| 1397 | break; |
| 1398 | } |
| 1399 | newobj = pop_context (); |
| 1400 | /* Stack must be empty now. */ |
| 1401 | if (context_stack_depth > 0 || newobj == NULL) |
| 1402 | { |
| 1403 | ef_complaint (cs->c_symnum); |
| 1404 | within_function = 0; |
| 1405 | break; |
| 1406 | } |
| 1407 | |
| 1408 | finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
| 1409 | NULL, newobj->start_addr, |
| 1410 | (fcn_cs_saved.c_value |
| 1411 | + fcn_aux_saved.x_sym.x_misc.x_fsize |
| 1412 | + ANOFFSET (objfile->section_offsets, |
| 1413 | SECT_OFF_TEXT (objfile)))); |
| 1414 | within_function = 0; |
| 1415 | } |
| 1416 | break; |
| 1417 | |
| 1418 | case C_BSTAT: |
| 1419 | /* Begin static block. */ |
| 1420 | { |
| 1421 | struct internal_syment symbol; |
| 1422 | |
| 1423 | read_symbol (&symbol, cs->c_value); |
| 1424 | static_block_base = symbol.n_value; |
| 1425 | static_block_section = |
| 1426 | secnum_to_section (symbol.n_scnum, objfile); |
| 1427 | } |
| 1428 | break; |
| 1429 | |
| 1430 | case C_ESTAT: |
| 1431 | /* End of static block. */ |
| 1432 | static_block_base = 0; |
| 1433 | static_block_section = -1; |
| 1434 | break; |
| 1435 | |
| 1436 | case C_ARG: |
| 1437 | case C_REGPARM: |
| 1438 | case C_REG: |
| 1439 | case C_TPDEF: |
| 1440 | case C_STRTAG: |
| 1441 | case C_UNTAG: |
| 1442 | case C_ENTAG: |
| 1443 | { |
| 1444 | complaint (&symfile_complaints, |
| 1445 | _("Unrecognized storage class %d."), |
| 1446 | cs->c_sclass); |
| 1447 | } |
| 1448 | break; |
| 1449 | |
| 1450 | case C_LABEL: |
| 1451 | case C_NULL: |
| 1452 | /* Ignore these. */ |
| 1453 | break; |
| 1454 | |
| 1455 | case C_HIDEXT: |
| 1456 | case C_STAT: |
| 1457 | break; |
| 1458 | |
| 1459 | case C_BINCL: |
| 1460 | /* beginning of include file */ |
| 1461 | /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted |
| 1462 | order. Thus, when wee see them, we might not know enough info |
| 1463 | to process them. Thus, we'll be saving them into a table |
| 1464 | (inclTable) and postpone their processing. */ |
| 1465 | |
| 1466 | record_include_begin (cs); |
| 1467 | break; |
| 1468 | |
| 1469 | case C_EINCL: |
| 1470 | /* End of include file. */ |
| 1471 | /* See the comment after case C_BINCL. */ |
| 1472 | record_include_end (cs); |
| 1473 | break; |
| 1474 | |
| 1475 | case C_BLOCK: |
| 1476 | if (strcmp (cs->c_name, ".bb") == 0) |
| 1477 | { |
| 1478 | depth++; |
| 1479 | newobj = push_context (depth, |
| 1480 | (cs->c_value |
| 1481 | + ANOFFSET (objfile->section_offsets, |
| 1482 | SECT_OFF_TEXT (objfile)))); |
| 1483 | } |
| 1484 | else if (strcmp (cs->c_name, ".eb") == 0) |
| 1485 | { |
| 1486 | if (context_stack_depth <= 0) |
| 1487 | { /* We attempted to pop an empty context stack. */ |
| 1488 | eb_complaint (cs->c_symnum); |
| 1489 | break; |
| 1490 | } |
| 1491 | newobj = pop_context (); |
| 1492 | if (depth-- != newobj->depth) |
| 1493 | { |
| 1494 | eb_complaint (cs->c_symnum); |
| 1495 | break; |
| 1496 | } |
| 1497 | if (local_symbols && context_stack_depth > 0) |
| 1498 | { |
| 1499 | /* Make a block for the local symbols within. */ |
| 1500 | finish_block (newobj->name, &local_symbols, |
| 1501 | newobj->old_blocks, NULL, |
| 1502 | newobj->start_addr, |
| 1503 | (cs->c_value |
| 1504 | + ANOFFSET (objfile->section_offsets, |
| 1505 | SECT_OFF_TEXT (objfile)))); |
| 1506 | } |
| 1507 | local_symbols = newobj->locals; |
| 1508 | } |
| 1509 | break; |
| 1510 | |
| 1511 | default: |
| 1512 | process_xcoff_symbol (cs, objfile); |
| 1513 | break; |
| 1514 | } |
| 1515 | } |
| 1516 | |
| 1517 | if (get_last_source_file ()) |
| 1518 | { |
| 1519 | struct compunit_symtab *cust; |
| 1520 | |
| 1521 | complete_symtab (filestring, file_start_addr); |
| 1522 | cur_src_end_addr = file_end_addr; |
| 1523 | cust = end_symtab (file_end_addr, SECT_OFF_TEXT (objfile)); |
| 1524 | /* When reading symbols for the last C_FILE of the objfile, try |
| 1525 | to make sure that we set pst->compunit_symtab to the symtab for the |
| 1526 | file, not to the _globals_ symtab. I'm not sure whether this |
| 1527 | actually works right or when/if it comes up. */ |
| 1528 | if (pst->compunit_symtab == NULL) |
| 1529 | pst->compunit_symtab = cust; |
| 1530 | end_stabs (); |
| 1531 | } |
| 1532 | } |
| 1533 | |
| 1534 | #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \ |
| 1535 | (SYMBOL2) = XOBNEW (&objfile->objfile_obstack, struct symbol); \ |
| 1536 | *(SYMBOL2) = *(SYMBOL1); |
| 1537 | |
| 1538 | |
| 1539 | #define SYMNAME_ALLOC(NAME, ALLOCED) \ |
| 1540 | ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \ |
| 1541 | (NAME), strlen (NAME))) |
| 1542 | |
| 1543 | |
| 1544 | /* process one xcoff symbol. */ |
| 1545 | |
| 1546 | static struct symbol * |
| 1547 | process_xcoff_symbol (struct coff_symbol *cs, struct objfile *objfile) |
| 1548 | { |
| 1549 | struct symbol onesymbol; |
| 1550 | struct symbol *sym = &onesymbol; |
| 1551 | struct symbol *sym2 = NULL; |
| 1552 | char *name, *pp; |
| 1553 | |
| 1554 | int sec; |
| 1555 | CORE_ADDR off; |
| 1556 | |
| 1557 | if (cs->c_secnum < 0) |
| 1558 | { |
| 1559 | /* The value is a register number, offset within a frame, etc., |
| 1560 | and does not get relocated. */ |
| 1561 | off = 0; |
| 1562 | sec = -1; |
| 1563 | } |
| 1564 | else |
| 1565 | { |
| 1566 | sec = secnum_to_section (cs->c_secnum, objfile); |
| 1567 | off = ANOFFSET (objfile->section_offsets, sec); |
| 1568 | } |
| 1569 | |
| 1570 | name = cs->c_name; |
| 1571 | if (name[0] == '.') |
| 1572 | ++name; |
| 1573 | |
| 1574 | initialize_objfile_symbol (sym); |
| 1575 | |
| 1576 | /* default assumptions */ |
| 1577 | SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off; |
| 1578 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 1579 | SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile); |
| 1580 | |
| 1581 | if (ISFCN (cs->c_type)) |
| 1582 | { |
| 1583 | /* At this point, we don't know the type of the function. This |
| 1584 | will be patched with the type from its stab entry later on in |
| 1585 | patch_block_stabs (), unless the file was compiled without -g. */ |
| 1586 | |
| 1587 | SYMBOL_SET_LINKAGE_NAME (sym, ((const char *) |
| 1588 | SYMNAME_ALLOC (name, symname_alloced))); |
| 1589 | SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_text_symbol; |
| 1590 | |
| 1591 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
| 1592 | SYMBOL_DUP (sym, sym2); |
| 1593 | |
| 1594 | if (cs->c_sclass == C_EXT || C_WEAKEXT) |
| 1595 | add_symbol_to_list (sym2, &global_symbols); |
| 1596 | else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT) |
| 1597 | add_symbol_to_list (sym2, &file_symbols); |
| 1598 | } |
| 1599 | else |
| 1600 | { |
| 1601 | /* In case we can't figure out the type, provide default. */ |
| 1602 | SYMBOL_TYPE (sym) = objfile_type (objfile)->nodebug_data_symbol; |
| 1603 | |
| 1604 | switch (cs->c_sclass) |
| 1605 | { |
| 1606 | #if 0 |
| 1607 | /* The values of functions and global symbols are now resolved |
| 1608 | via the global_sym_chain in stabsread.c. */ |
| 1609 | case C_FUN: |
| 1610 | if (fcn_cs_saved.c_sclass == C_EXT) |
| 1611 | add_stab_to_list (name, &global_stabs); |
| 1612 | else |
| 1613 | add_stab_to_list (name, &file_stabs); |
| 1614 | break; |
| 1615 | |
| 1616 | case C_GSYM: |
| 1617 | add_stab_to_list (name, &global_stabs); |
| 1618 | break; |
| 1619 | #endif |
| 1620 | |
| 1621 | case C_BCOMM: |
| 1622 | common_block_start (cs->c_name, objfile); |
| 1623 | break; |
| 1624 | |
| 1625 | case C_ECOMM: |
| 1626 | common_block_end (objfile); |
| 1627 | break; |
| 1628 | |
| 1629 | default: |
| 1630 | complaint (&symfile_complaints, _("Unexpected storage class: %d"), |
| 1631 | cs->c_sclass); |
| 1632 | /* FALLTHROUGH */ |
| 1633 | |
| 1634 | case C_DECL: |
| 1635 | case C_PSYM: |
| 1636 | case C_RPSYM: |
| 1637 | case C_ECOML: |
| 1638 | case C_LSYM: |
| 1639 | case C_RSYM: |
| 1640 | case C_GSYM: |
| 1641 | |
| 1642 | { |
| 1643 | sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile); |
| 1644 | if (sym != NULL) |
| 1645 | { |
| 1646 | SYMBOL_SECTION (sym) = sec; |
| 1647 | } |
| 1648 | return sym; |
| 1649 | } |
| 1650 | |
| 1651 | case C_STSYM: |
| 1652 | |
| 1653 | /* For xlc (not GCC), the 'V' symbol descriptor is used for |
| 1654 | all statics and we need to distinguish file-scope versus |
| 1655 | function-scope using within_function. We do this by |
| 1656 | changing the string we pass to define_symbol to use 'S' |
| 1657 | where we need to, which is not necessarily super-clean, |
| 1658 | but seems workable enough. */ |
| 1659 | |
| 1660 | if (*name == ':') |
| 1661 | return NULL; |
| 1662 | |
| 1663 | pp = strchr (name, ':'); |
| 1664 | if (pp == NULL) |
| 1665 | return NULL; |
| 1666 | |
| 1667 | ++pp; |
| 1668 | if (*pp == 'V' && !within_function) |
| 1669 | *pp = 'S'; |
| 1670 | sym = define_symbol ((cs->c_value |
| 1671 | + ANOFFSET (objfile->section_offsets, |
| 1672 | static_block_section)), |
| 1673 | cs->c_name, 0, 0, objfile); |
| 1674 | if (sym != NULL) |
| 1675 | { |
| 1676 | SYMBOL_VALUE_ADDRESS (sym) += static_block_base; |
| 1677 | SYMBOL_SECTION (sym) = static_block_section; |
| 1678 | } |
| 1679 | return sym; |
| 1680 | |
| 1681 | } |
| 1682 | } |
| 1683 | return sym2; |
| 1684 | } |
| 1685 | |
| 1686 | /* Extract the file name from the aux entry of a C_FILE symbol. |
| 1687 | Result is in static storage and is only good for temporary use. */ |
| 1688 | |
| 1689 | static char * |
| 1690 | coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile) |
| 1691 | { |
| 1692 | static char buffer[BUFSIZ]; |
| 1693 | |
| 1694 | if (aux_entry->x_file.x_n.x_zeroes == 0) |
| 1695 | strcpy (buffer, (XCOFF_DATA (objfile)->strtbl |
| 1696 | + aux_entry->x_file.x_n.x_offset)); |
| 1697 | else |
| 1698 | { |
| 1699 | strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); |
| 1700 | buffer[FILNMLEN] = '\0'; |
| 1701 | } |
| 1702 | return (buffer); |
| 1703 | } |
| 1704 | |
| 1705 | /* Set *SYMBOL to symbol number symno in symtbl. */ |
| 1706 | static void |
| 1707 | read_symbol (struct internal_syment *symbol, int symno) |
| 1708 | { |
| 1709 | struct coff_symfile_info *xcoff = XCOFF_DATA (this_symtab_objfile); |
| 1710 | int nsyms = xcoff->symtbl_num_syms; |
| 1711 | char *stbl = xcoff->symtbl; |
| 1712 | |
| 1713 | if (symno < 0 || symno >= nsyms) |
| 1714 | { |
| 1715 | complaint (&symfile_complaints, _("Invalid symbol offset")); |
| 1716 | symbol->n_value = 0; |
| 1717 | symbol->n_scnum = -1; |
| 1718 | return; |
| 1719 | } |
| 1720 | bfd_coff_swap_sym_in (this_symtab_objfile->obfd, |
| 1721 | stbl + (symno * local_symesz), |
| 1722 | symbol); |
| 1723 | } |
| 1724 | |
| 1725 | /* Get value corresponding to symbol number symno in symtbl. */ |
| 1726 | |
| 1727 | static CORE_ADDR |
| 1728 | read_symbol_nvalue (int symno) |
| 1729 | { |
| 1730 | struct internal_syment symbol[1]; |
| 1731 | |
| 1732 | read_symbol (symbol, symno); |
| 1733 | return symbol->n_value; |
| 1734 | } |
| 1735 | |
| 1736 | |
| 1737 | /* Find the address of the function corresponding to symno, where |
| 1738 | symno is the symbol pointed to by the linetable. */ |
| 1739 | |
| 1740 | static int |
| 1741 | read_symbol_lineno (int symno) |
| 1742 | { |
| 1743 | struct objfile *objfile = this_symtab_objfile; |
| 1744 | int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd); |
| 1745 | |
| 1746 | struct coff_symfile_info *info = XCOFF_DATA (objfile); |
| 1747 | int nsyms = info->symtbl_num_syms; |
| 1748 | char *stbl = info->symtbl; |
| 1749 | char *strtbl = info->strtbl; |
| 1750 | |
| 1751 | struct internal_syment symbol[1]; |
| 1752 | union internal_auxent main_aux[1]; |
| 1753 | |
| 1754 | if (symno < 0) |
| 1755 | { |
| 1756 | bf_notfound_complaint (); |
| 1757 | return 0; |
| 1758 | } |
| 1759 | |
| 1760 | /* Note that just searching for a short distance (e.g. 50 symbols) |
| 1761 | is not enough, at least in the following case. |
| 1762 | |
| 1763 | .extern foo |
| 1764 | [many .stabx entries] |
| 1765 | [a few functions, referring to foo] |
| 1766 | .globl foo |
| 1767 | .bf |
| 1768 | |
| 1769 | What happens here is that the assembler moves the .stabx entries |
| 1770 | to right before the ".bf" for foo, but the symbol for "foo" is before |
| 1771 | all the stabx entries. See PR gdb/2222. */ |
| 1772 | |
| 1773 | /* Maintaining a table of .bf entries might be preferable to this search. |
| 1774 | If I understand things correctly it would need to be done only for |
| 1775 | the duration of a single psymtab to symtab conversion. */ |
| 1776 | while (symno < nsyms) |
| 1777 | { |
| 1778 | bfd_coff_swap_sym_in (symfile_bfd, |
| 1779 | stbl + (symno * local_symesz), symbol); |
| 1780 | if (symbol->n_sclass == C_FCN) |
| 1781 | { |
| 1782 | char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name; |
| 1783 | |
| 1784 | if (strcmp (name, ".bf") == 0) |
| 1785 | goto gotit; |
| 1786 | } |
| 1787 | symno += symbol->n_numaux + 1; |
| 1788 | } |
| 1789 | |
| 1790 | bf_notfound_complaint (); |
| 1791 | return 0; |
| 1792 | |
| 1793 | gotit: |
| 1794 | /* Take aux entry and return its lineno. */ |
| 1795 | symno++; |
| 1796 | bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz, |
| 1797 | symbol->n_type, symbol->n_sclass, |
| 1798 | 0, symbol->n_numaux, main_aux); |
| 1799 | |
| 1800 | return main_aux->x_sym.x_misc.x_lnsz.x_lnno; |
| 1801 | } |
| 1802 | |
| 1803 | /* Support for line number handling. */ |
| 1804 | |
| 1805 | /* This function is called for every section; it finds the outer limits |
| 1806 | * of the line table (minimum and maximum file offset) so that the |
| 1807 | * mainline code can read the whole thing for efficiency. |
| 1808 | */ |
| 1809 | static void |
| 1810 | find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo) |
| 1811 | { |
| 1812 | struct coff_symfile_info *info; |
| 1813 | int size, count; |
| 1814 | file_ptr offset, maxoff; |
| 1815 | |
| 1816 | count = asect->lineno_count; |
| 1817 | |
| 1818 | if (strcmp (asect->name, ".text") != 0 || count == 0) |
| 1819 | return; |
| 1820 | |
| 1821 | size = count * coff_data (abfd)->local_linesz; |
| 1822 | info = (struct coff_symfile_info *) vpinfo; |
| 1823 | offset = asect->line_filepos; |
| 1824 | maxoff = offset + size; |
| 1825 | |
| 1826 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) |
| 1827 | info->min_lineno_offset = offset; |
| 1828 | |
| 1829 | if (maxoff > info->max_lineno_offset) |
| 1830 | info->max_lineno_offset = maxoff; |
| 1831 | } |
| 1832 | \f |
| 1833 | static void |
| 1834 | xcoff_psymtab_to_symtab_1 (struct objfile *objfile, struct partial_symtab *pst) |
| 1835 | { |
| 1836 | struct cleanup *old_chain; |
| 1837 | int i; |
| 1838 | |
| 1839 | if (!pst) |
| 1840 | return; |
| 1841 | |
| 1842 | if (pst->readin) |
| 1843 | { |
| 1844 | fprintf_unfiltered |
| 1845 | (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", |
| 1846 | pst->filename); |
| 1847 | return; |
| 1848 | } |
| 1849 | |
| 1850 | /* Read in all partial symtabs on which this one is dependent. */ |
| 1851 | for (i = 0; i < pst->number_of_dependencies; i++) |
| 1852 | if (!pst->dependencies[i]->readin) |
| 1853 | { |
| 1854 | /* Inform about additional files that need to be read in. */ |
| 1855 | if (info_verbose) |
| 1856 | { |
| 1857 | fputs_filtered (" ", gdb_stdout); |
| 1858 | wrap_here (""); |
| 1859 | fputs_filtered ("and ", gdb_stdout); |
| 1860 | wrap_here (""); |
| 1861 | printf_filtered ("%s...", pst->dependencies[i]->filename); |
| 1862 | wrap_here (""); /* Flush output */ |
| 1863 | gdb_flush (gdb_stdout); |
| 1864 | } |
| 1865 | xcoff_psymtab_to_symtab_1 (objfile, pst->dependencies[i]); |
| 1866 | } |
| 1867 | |
| 1868 | if (((struct symloc *) pst->read_symtab_private)->numsyms != 0) |
| 1869 | { |
| 1870 | /* Init stuff necessary for reading in symbols. */ |
| 1871 | stabsread_init (); |
| 1872 | buildsym_init (); |
| 1873 | old_chain = make_cleanup (really_free_pendings, 0); |
| 1874 | |
| 1875 | read_xcoff_symtab (objfile, pst); |
| 1876 | |
| 1877 | do_cleanups (old_chain); |
| 1878 | } |
| 1879 | |
| 1880 | pst->readin = 1; |
| 1881 | } |
| 1882 | |
| 1883 | /* Read in all of the symbols for a given psymtab for real. |
| 1884 | Be verbose about it if the user wants that. SELF is not NULL. */ |
| 1885 | |
| 1886 | static void |
| 1887 | xcoff_read_symtab (struct partial_symtab *self, struct objfile *objfile) |
| 1888 | { |
| 1889 | if (self->readin) |
| 1890 | { |
| 1891 | fprintf_unfiltered |
| 1892 | (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", |
| 1893 | self->filename); |
| 1894 | return; |
| 1895 | } |
| 1896 | |
| 1897 | if (((struct symloc *) self->read_symtab_private)->numsyms != 0 |
| 1898 | || self->number_of_dependencies) |
| 1899 | { |
| 1900 | /* Print the message now, before reading the string table, |
| 1901 | to avoid disconcerting pauses. */ |
| 1902 | if (info_verbose) |
| 1903 | { |
| 1904 | printf_filtered ("Reading in symbols for %s...", self->filename); |
| 1905 | gdb_flush (gdb_stdout); |
| 1906 | } |
| 1907 | |
| 1908 | next_symbol_text_func = xcoff_next_symbol_text; |
| 1909 | |
| 1910 | xcoff_psymtab_to_symtab_1 (objfile, self); |
| 1911 | |
| 1912 | /* Match with global symbols. This only needs to be done once, |
| 1913 | after all of the symtabs and dependencies have been read in. */ |
| 1914 | scan_file_globals (objfile); |
| 1915 | |
| 1916 | /* Finish up the debug error message. */ |
| 1917 | if (info_verbose) |
| 1918 | printf_filtered ("done.\n"); |
| 1919 | } |
| 1920 | } |
| 1921 | \f |
| 1922 | static void |
| 1923 | xcoff_new_init (struct objfile *objfile) |
| 1924 | { |
| 1925 | stabsread_new_init (); |
| 1926 | buildsym_new_init (); |
| 1927 | } |
| 1928 | |
| 1929 | /* Do initialization in preparation for reading symbols from OBJFILE. |
| 1930 | |
| 1931 | We will only be called if this is an XCOFF or XCOFF-like file. |
| 1932 | BFD handles figuring out the format of the file, and code in symfile.c |
| 1933 | uses BFD's determination to vector to us. */ |
| 1934 | |
| 1935 | static void |
| 1936 | xcoff_symfile_init (struct objfile *objfile) |
| 1937 | { |
| 1938 | struct coff_symfile_info *xcoff; |
| 1939 | |
| 1940 | /* Allocate struct to keep track of the symfile. */ |
| 1941 | xcoff = XNEW (struct coff_symfile_info); |
| 1942 | set_objfile_data (objfile, xcoff_objfile_data_key, xcoff); |
| 1943 | |
| 1944 | /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we |
| 1945 | find this causes a significant slowdown in gdb then we could |
| 1946 | set it in the debug symbol readers only when necessary. */ |
| 1947 | objfile->flags |= OBJF_REORDERED; |
| 1948 | } |
| 1949 | |
| 1950 | /* Perform any local cleanups required when we are done with a particular |
| 1951 | objfile. I.E, we are in the process of discarding all symbol information |
| 1952 | for an objfile, freeing up all memory held for it, and unlinking the |
| 1953 | objfile struct from the global list of known objfiles. */ |
| 1954 | |
| 1955 | static void |
| 1956 | xcoff_symfile_finish (struct objfile *objfile) |
| 1957 | { |
| 1958 | /* Start with a fresh include table for the next objfile. */ |
| 1959 | if (inclTable) |
| 1960 | { |
| 1961 | xfree (inclTable); |
| 1962 | inclTable = NULL; |
| 1963 | } |
| 1964 | inclIndx = inclLength = inclDepth = 0; |
| 1965 | |
| 1966 | dwarf2_free_objfile (objfile); |
| 1967 | } |
| 1968 | |
| 1969 | |
| 1970 | static void |
| 1971 | init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile) |
| 1972 | { |
| 1973 | long length; |
| 1974 | int val; |
| 1975 | unsigned char lengthbuf[4]; |
| 1976 | char *strtbl; |
| 1977 | struct coff_symfile_info *xcoff = XCOFF_DATA (objfile); |
| 1978 | |
| 1979 | xcoff->strtbl = NULL; |
| 1980 | |
| 1981 | if (bfd_seek (abfd, offset, SEEK_SET) < 0) |
| 1982 | error (_("cannot seek to string table in %s: %s"), |
| 1983 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
| 1984 | |
| 1985 | val = bfd_bread ((char *) lengthbuf, sizeof lengthbuf, abfd); |
| 1986 | length = bfd_h_get_32 (abfd, lengthbuf); |
| 1987 | |
| 1988 | /* If no string table is needed, then the file may end immediately |
| 1989 | after the symbols. Just return with `strtbl' set to NULL. */ |
| 1990 | |
| 1991 | if (val != sizeof lengthbuf || length < sizeof lengthbuf) |
| 1992 | return; |
| 1993 | |
| 1994 | /* Allocate string table from objfile_obstack. We will need this table |
| 1995 | as long as we have its symbol table around. */ |
| 1996 | |
| 1997 | strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length); |
| 1998 | xcoff->strtbl = strtbl; |
| 1999 | |
| 2000 | /* Copy length buffer, the first byte is usually zero and is |
| 2001 | used for stabs with a name length of zero. */ |
| 2002 | memcpy (strtbl, lengthbuf, sizeof lengthbuf); |
| 2003 | if (length == sizeof lengthbuf) |
| 2004 | return; |
| 2005 | |
| 2006 | val = bfd_bread (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd); |
| 2007 | |
| 2008 | if (val != length - sizeof lengthbuf) |
| 2009 | error (_("cannot read string table from %s: %s"), |
| 2010 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
| 2011 | if (strtbl[length - 1] != '\0') |
| 2012 | error (_("bad symbol file: string table " |
| 2013 | "does not end with null character")); |
| 2014 | |
| 2015 | return; |
| 2016 | } |
| 2017 | \f |
| 2018 | /* If we have not yet seen a function for this psymtab, this is 0. If we |
| 2019 | have seen one, it is the offset in the line numbers of the line numbers |
| 2020 | for the psymtab. */ |
| 2021 | static unsigned int first_fun_line_offset; |
| 2022 | |
| 2023 | /* Allocate and partially fill a partial symtab. It will be |
| 2024 | completely filled at the end of the symbol list. |
| 2025 | |
| 2026 | SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR |
| 2027 | is the address relative to which its symbols are (incremental) or 0 |
| 2028 | (normal). */ |
| 2029 | |
| 2030 | static struct partial_symtab * |
| 2031 | xcoff_start_psymtab (struct objfile *objfile, |
| 2032 | const char *filename, int first_symnum, |
| 2033 | struct partial_symbol **global_syms, |
| 2034 | struct partial_symbol **static_syms) |
| 2035 | { |
| 2036 | struct partial_symtab *result = |
| 2037 | start_psymtab_common (objfile, |
| 2038 | filename, |
| 2039 | /* We fill in textlow later. */ |
| 2040 | 0, |
| 2041 | global_syms, static_syms); |
| 2042 | |
| 2043 | result->read_symtab_private = |
| 2044 | XOBNEW (&objfile->objfile_obstack, struct symloc); |
| 2045 | ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum; |
| 2046 | result->read_symtab = xcoff_read_symtab; |
| 2047 | |
| 2048 | /* Deduce the source language from the filename for this psymtab. */ |
| 2049 | psymtab_language = deduce_language_from_filename (filename); |
| 2050 | |
| 2051 | return result; |
| 2052 | } |
| 2053 | |
| 2054 | /* Close off the current usage of PST. |
| 2055 | Returns PST, or NULL if the partial symtab was empty and thrown away. |
| 2056 | |
| 2057 | CAPPING_SYMBOL_NUMBER is the end of pst (exclusive). |
| 2058 | |
| 2059 | INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES |
| 2060 | are the information for includes and dependencies. */ |
| 2061 | |
| 2062 | static struct partial_symtab * |
| 2063 | xcoff_end_psymtab (struct objfile *objfile, struct partial_symtab *pst, |
| 2064 | const char **include_list, int num_includes, |
| 2065 | int capping_symbol_number, |
| 2066 | struct partial_symtab **dependency_list, |
| 2067 | int number_dependencies, int textlow_not_set) |
| 2068 | { |
| 2069 | int i; |
| 2070 | |
| 2071 | if (capping_symbol_number != -1) |
| 2072 | ((struct symloc *) pst->read_symtab_private)->numsyms = |
| 2073 | capping_symbol_number |
| 2074 | - ((struct symloc *) pst->read_symtab_private)->first_symnum; |
| 2075 | ((struct symloc *) pst->read_symtab_private)->lineno_off = |
| 2076 | first_fun_line_offset; |
| 2077 | first_fun_line_offset = 0; |
| 2078 | |
| 2079 | end_psymtab_common (objfile, pst); |
| 2080 | |
| 2081 | pst->number_of_dependencies = number_dependencies; |
| 2082 | if (number_dependencies) |
| 2083 | { |
| 2084 | pst->dependencies = XOBNEWVEC (&objfile->objfile_obstack, |
| 2085 | struct partial_symtab *, |
| 2086 | number_dependencies); |
| 2087 | memcpy (pst->dependencies, dependency_list, |
| 2088 | number_dependencies * sizeof (struct partial_symtab *)); |
| 2089 | } |
| 2090 | else |
| 2091 | pst->dependencies = 0; |
| 2092 | |
| 2093 | for (i = 0; i < num_includes; i++) |
| 2094 | { |
| 2095 | struct partial_symtab *subpst = |
| 2096 | allocate_psymtab (include_list[i], objfile); |
| 2097 | |
| 2098 | subpst->read_symtab_private = obstack_alloc (&objfile->objfile_obstack, |
| 2099 | sizeof (struct symloc)); |
| 2100 | ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0; |
| 2101 | ((struct symloc *) subpst->read_symtab_private)->numsyms = 0; |
| 2102 | subpst->textlow = 0; |
| 2103 | subpst->texthigh = 0; |
| 2104 | |
| 2105 | /* We could save slight bits of space by only making one of these, |
| 2106 | shared by the entire set of include files. FIXME-someday. */ |
| 2107 | subpst->dependencies = |
| 2108 | XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); |
| 2109 | subpst->dependencies[0] = pst; |
| 2110 | subpst->number_of_dependencies = 1; |
| 2111 | |
| 2112 | subpst->globals_offset = |
| 2113 | subpst->n_global_syms = |
| 2114 | subpst->statics_offset = |
| 2115 | subpst->n_static_syms = 0; |
| 2116 | |
| 2117 | subpst->readin = 0; |
| 2118 | subpst->compunit_symtab = NULL; |
| 2119 | subpst->read_symtab = pst->read_symtab; |
| 2120 | } |
| 2121 | |
| 2122 | if (num_includes == 0 |
| 2123 | && number_dependencies == 0 |
| 2124 | && pst->n_global_syms == 0 |
| 2125 | && pst->n_static_syms == 0) |
| 2126 | { |
| 2127 | /* Throw away this psymtab, it's empty. We can't deallocate it, since |
| 2128 | it is on the obstack, but we can forget to chain it on the list. */ |
| 2129 | /* Empty psymtabs happen as a result of header files which don't have |
| 2130 | any symbols in them. There can be a lot of them. */ |
| 2131 | |
| 2132 | discard_psymtab (objfile, pst); |
| 2133 | |
| 2134 | /* Indicate that psymtab was thrown away. */ |
| 2135 | pst = NULL; |
| 2136 | } |
| 2137 | return pst; |
| 2138 | } |
| 2139 | |
| 2140 | /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in |
| 2141 | *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over |
| 2142 | the symbol and its auxents. */ |
| 2143 | |
| 2144 | static void |
| 2145 | swap_sym (struct internal_syment *symbol, union internal_auxent *aux, |
| 2146 | const char **name, char **raw, unsigned int *symnump, |
| 2147 | struct objfile *objfile) |
| 2148 | { |
| 2149 | bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol); |
| 2150 | if (symbol->n_zeroes) |
| 2151 | { |
| 2152 | /* If it's exactly E_SYMNMLEN characters long it isn't |
| 2153 | '\0'-terminated. */ |
| 2154 | if (symbol->n_name[E_SYMNMLEN - 1] != '\0') |
| 2155 | { |
| 2156 | /* FIXME: wastes memory for symbols which we don't end up putting |
| 2157 | into the minimal symbols. */ |
| 2158 | char *p; |
| 2159 | |
| 2160 | p = (char *) obstack_alloc (&objfile->objfile_obstack, |
| 2161 | E_SYMNMLEN + 1); |
| 2162 | strncpy (p, symbol->n_name, E_SYMNMLEN); |
| 2163 | p[E_SYMNMLEN] = '\0'; |
| 2164 | *name = p; |
| 2165 | } |
| 2166 | else |
| 2167 | /* Point to the unswapped name as that persists as long as the |
| 2168 | objfile does. */ |
| 2169 | *name = ((struct external_syment *) *raw)->e.e_name; |
| 2170 | } |
| 2171 | else if (symbol->n_sclass & 0x80) |
| 2172 | { |
| 2173 | *name = XCOFF_DATA (objfile)->debugsec + symbol->n_offset; |
| 2174 | } |
| 2175 | else |
| 2176 | { |
| 2177 | *name = XCOFF_DATA (objfile)->strtbl + symbol->n_offset; |
| 2178 | } |
| 2179 | ++*symnump; |
| 2180 | *raw += coff_data (objfile->obfd)->local_symesz; |
| 2181 | if (symbol->n_numaux > 0) |
| 2182 | { |
| 2183 | bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type, |
| 2184 | symbol->n_sclass, 0, symbol->n_numaux, aux); |
| 2185 | |
| 2186 | *symnump += symbol->n_numaux; |
| 2187 | *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux; |
| 2188 | } |
| 2189 | } |
| 2190 | |
| 2191 | static void |
| 2192 | function_outside_compilation_unit_complaint (const char *arg1) |
| 2193 | { |
| 2194 | complaint (&symfile_complaints, |
| 2195 | _("function `%s' appears to be defined " |
| 2196 | "outside of all compilation units"), |
| 2197 | arg1); |
| 2198 | } |
| 2199 | |
| 2200 | static void |
| 2201 | scan_xcoff_symtab (minimal_symbol_reader &reader, |
| 2202 | struct objfile *objfile) |
| 2203 | { |
| 2204 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 2205 | CORE_ADDR toc_offset = 0; /* toc offset value in data section. */ |
| 2206 | const char *filestring = NULL; |
| 2207 | |
| 2208 | const char *namestring; |
| 2209 | bfd *abfd; |
| 2210 | asection *bfd_sect; |
| 2211 | unsigned int nsyms; |
| 2212 | |
| 2213 | /* Current partial symtab */ |
| 2214 | struct partial_symtab *pst; |
| 2215 | |
| 2216 | /* List of current psymtab's include files. */ |
| 2217 | const char **psymtab_include_list; |
| 2218 | int includes_allocated; |
| 2219 | int includes_used; |
| 2220 | |
| 2221 | /* Index within current psymtab dependency list. */ |
| 2222 | struct partial_symtab **dependency_list; |
| 2223 | int dependencies_used, dependencies_allocated; |
| 2224 | |
| 2225 | char *sraw_symbol; |
| 2226 | struct internal_syment symbol; |
| 2227 | union internal_auxent main_aux[5]; |
| 2228 | unsigned int ssymnum; |
| 2229 | |
| 2230 | const char *last_csect_name = NULL; /* Last seen csect's name and value. */ |
| 2231 | CORE_ADDR last_csect_val = 0; |
| 2232 | int last_csect_sec = 0; |
| 2233 | int misc_func_recorded = 0; /* true if any misc. function. */ |
| 2234 | int textlow_not_set = 1; |
| 2235 | |
| 2236 | pst = (struct partial_symtab *) 0; |
| 2237 | |
| 2238 | includes_allocated = 30; |
| 2239 | includes_used = 0; |
| 2240 | psymtab_include_list = (const char **) alloca (includes_allocated * |
| 2241 | sizeof (const char *)); |
| 2242 | |
| 2243 | dependencies_allocated = 30; |
| 2244 | dependencies_used = 0; |
| 2245 | dependency_list = |
| 2246 | (struct partial_symtab **) alloca (dependencies_allocated * |
| 2247 | sizeof (struct partial_symtab *)); |
| 2248 | |
| 2249 | set_last_source_file (NULL); |
| 2250 | |
| 2251 | abfd = objfile->obfd; |
| 2252 | next_symbol_text_func = xcoff_next_symbol_text; |
| 2253 | |
| 2254 | sraw_symbol = XCOFF_DATA (objfile)->symtbl; |
| 2255 | nsyms = XCOFF_DATA (objfile)->symtbl_num_syms; |
| 2256 | ssymnum = 0; |
| 2257 | while (ssymnum < nsyms) |
| 2258 | { |
| 2259 | int sclass; |
| 2260 | |
| 2261 | QUIT; |
| 2262 | |
| 2263 | bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol); |
| 2264 | sclass = symbol.n_sclass; |
| 2265 | |
| 2266 | switch (sclass) |
| 2267 | { |
| 2268 | case C_EXT: |
| 2269 | case C_HIDEXT: |
| 2270 | case C_WEAKEXT: |
| 2271 | { |
| 2272 | /* The CSECT auxent--always the last auxent. */ |
| 2273 | union internal_auxent csect_aux; |
| 2274 | unsigned int symnum_before = ssymnum; |
| 2275 | |
| 2276 | swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, |
| 2277 | &ssymnum, objfile); |
| 2278 | if (symbol.n_numaux > 1) |
| 2279 | { |
| 2280 | bfd_coff_swap_aux_in |
| 2281 | (objfile->obfd, |
| 2282 | sraw_symbol - coff_data (abfd)->local_symesz, |
| 2283 | symbol.n_type, |
| 2284 | symbol.n_sclass, |
| 2285 | symbol.n_numaux - 1, |
| 2286 | symbol.n_numaux, |
| 2287 | &csect_aux); |
| 2288 | } |
| 2289 | else |
| 2290 | csect_aux = main_aux[0]; |
| 2291 | |
| 2292 | /* If symbol name starts with ".$" or "$", ignore it. */ |
| 2293 | if (namestring[0] == '$' |
| 2294 | || (namestring[0] == '.' && namestring[1] == '$')) |
| 2295 | break; |
| 2296 | |
| 2297 | switch (csect_aux.x_csect.x_smtyp & 0x7) |
| 2298 | { |
| 2299 | case XTY_SD: |
| 2300 | switch (csect_aux.x_csect.x_smclas) |
| 2301 | { |
| 2302 | case XMC_PR: |
| 2303 | if (last_csect_name) |
| 2304 | { |
| 2305 | /* If no misc. function recorded in the last |
| 2306 | seen csect, enter it as a function. This |
| 2307 | will take care of functions like strcmp() |
| 2308 | compiled by xlc. */ |
| 2309 | |
| 2310 | if (!misc_func_recorded) |
| 2311 | { |
| 2312 | record_minimal_symbol |
| 2313 | (reader, last_csect_name, last_csect_val, |
| 2314 | mst_text, last_csect_sec, objfile); |
| 2315 | misc_func_recorded = 1; |
| 2316 | } |
| 2317 | |
| 2318 | if (pst != NULL) |
| 2319 | { |
| 2320 | /* We have to allocate one psymtab for |
| 2321 | each program csect, because their text |
| 2322 | sections need not be adjacent. */ |
| 2323 | xcoff_end_psymtab |
| 2324 | (objfile, pst, psymtab_include_list, |
| 2325 | includes_used, symnum_before, dependency_list, |
| 2326 | dependencies_used, textlow_not_set); |
| 2327 | includes_used = 0; |
| 2328 | dependencies_used = 0; |
| 2329 | /* Give all psymtabs for this source file the same |
| 2330 | name. */ |
| 2331 | pst = xcoff_start_psymtab |
| 2332 | (objfile, |
| 2333 | filestring, |
| 2334 | symnum_before, |
| 2335 | objfile->global_psymbols.next, |
| 2336 | objfile->static_psymbols.next); |
| 2337 | } |
| 2338 | } |
| 2339 | /* Activate the misc_func_recorded mechanism for |
| 2340 | compiler- and linker-generated CSECTs like ".strcmp" |
| 2341 | and "@FIX1". */ |
| 2342 | if (namestring && (namestring[0] == '.' |
| 2343 | || namestring[0] == '@')) |
| 2344 | { |
| 2345 | last_csect_name = namestring; |
| 2346 | last_csect_val = symbol.n_value; |
| 2347 | last_csect_sec = symbol.n_scnum; |
| 2348 | } |
| 2349 | if (pst != NULL) |
| 2350 | { |
| 2351 | CORE_ADDR highval = |
| 2352 | symbol.n_value + csect_aux.x_csect.x_scnlen.l; |
| 2353 | |
| 2354 | if (highval > pst->texthigh) |
| 2355 | pst->texthigh = highval; |
| 2356 | if (pst->textlow == 0 || symbol.n_value < pst->textlow) |
| 2357 | pst->textlow = symbol.n_value; |
| 2358 | } |
| 2359 | misc_func_recorded = 0; |
| 2360 | break; |
| 2361 | |
| 2362 | case XMC_RW: |
| 2363 | case XMC_TD: |
| 2364 | /* Data variables are recorded in the minimal symbol |
| 2365 | table, except for section symbols. */ |
| 2366 | if (*namestring != '.') |
| 2367 | record_minimal_symbol |
| 2368 | (reader, namestring, symbol.n_value, |
| 2369 | sclass == C_HIDEXT ? mst_file_data : mst_data, |
| 2370 | symbol.n_scnum, objfile); |
| 2371 | break; |
| 2372 | |
| 2373 | case XMC_TC0: |
| 2374 | if (toc_offset) |
| 2375 | warning (_("More than one XMC_TC0 symbol found.")); |
| 2376 | toc_offset = symbol.n_value; |
| 2377 | |
| 2378 | /* Make TOC offset relative to start address of |
| 2379 | section. */ |
| 2380 | bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile); |
| 2381 | if (bfd_sect) |
| 2382 | toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect); |
| 2383 | break; |
| 2384 | |
| 2385 | case XMC_TC: |
| 2386 | /* These symbols tell us where the TOC entry for a |
| 2387 | variable is, not the variable itself. */ |
| 2388 | break; |
| 2389 | |
| 2390 | default: |
| 2391 | break; |
| 2392 | } |
| 2393 | break; |
| 2394 | |
| 2395 | case XTY_LD: |
| 2396 | switch (csect_aux.x_csect.x_smclas) |
| 2397 | { |
| 2398 | case XMC_PR: |
| 2399 | /* A function entry point. */ |
| 2400 | |
| 2401 | if (first_fun_line_offset == 0 && symbol.n_numaux > 1) |
| 2402 | first_fun_line_offset = |
| 2403 | main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr; |
| 2404 | |
| 2405 | record_minimal_symbol |
| 2406 | (reader, namestring, symbol.n_value, |
| 2407 | sclass == C_HIDEXT ? mst_file_text : mst_text, |
| 2408 | symbol.n_scnum, objfile); |
| 2409 | misc_func_recorded = 1; |
| 2410 | break; |
| 2411 | |
| 2412 | case XMC_GL: |
| 2413 | /* shared library function trampoline code entry |
| 2414 | point. */ |
| 2415 | |
| 2416 | /* record trampoline code entries as |
| 2417 | mst_solib_trampoline symbol. When we lookup mst |
| 2418 | symbols, we will choose mst_text over |
| 2419 | mst_solib_trampoline. */ |
| 2420 | record_minimal_symbol |
| 2421 | (reader, namestring, symbol.n_value, |
| 2422 | mst_solib_trampoline, symbol.n_scnum, objfile); |
| 2423 | misc_func_recorded = 1; |
| 2424 | break; |
| 2425 | |
| 2426 | case XMC_DS: |
| 2427 | /* The symbols often have the same names as |
| 2428 | debug symbols for functions, and confuse |
| 2429 | lookup_symbol. */ |
| 2430 | break; |
| 2431 | |
| 2432 | default: |
| 2433 | |
| 2434 | /* xlc puts each variable in a separate csect, |
| 2435 | so we get an XTY_SD for each variable. But |
| 2436 | gcc puts several variables in a csect, so |
| 2437 | that each variable only gets an XTY_LD. We |
| 2438 | still need to record them. This will |
| 2439 | typically be XMC_RW; I suspect XMC_RO and |
| 2440 | XMC_BS might be possible too. */ |
| 2441 | if (*namestring != '.') |
| 2442 | record_minimal_symbol |
| 2443 | (reader, namestring, symbol.n_value, |
| 2444 | sclass == C_HIDEXT ? mst_file_data : mst_data, |
| 2445 | symbol.n_scnum, objfile); |
| 2446 | break; |
| 2447 | } |
| 2448 | break; |
| 2449 | |
| 2450 | case XTY_CM: |
| 2451 | switch (csect_aux.x_csect.x_smclas) |
| 2452 | { |
| 2453 | case XMC_RW: |
| 2454 | case XMC_BS: |
| 2455 | /* Common variables are recorded in the minimal symbol |
| 2456 | table, except for section symbols. */ |
| 2457 | if (*namestring != '.') |
| 2458 | record_minimal_symbol |
| 2459 | (reader, namestring, symbol.n_value, |
| 2460 | sclass == C_HIDEXT ? mst_file_bss : mst_bss, |
| 2461 | symbol.n_scnum, objfile); |
| 2462 | break; |
| 2463 | } |
| 2464 | break; |
| 2465 | |
| 2466 | default: |
| 2467 | break; |
| 2468 | } |
| 2469 | } |
| 2470 | break; |
| 2471 | case C_FILE: |
| 2472 | { |
| 2473 | unsigned int symnum_before; |
| 2474 | |
| 2475 | symnum_before = ssymnum; |
| 2476 | swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, |
| 2477 | &ssymnum, objfile); |
| 2478 | |
| 2479 | /* See if the last csect needs to be recorded. */ |
| 2480 | |
| 2481 | if (last_csect_name && !misc_func_recorded) |
| 2482 | { |
| 2483 | /* If no misc. function recorded in the last seen csect, enter |
| 2484 | it as a function. This will take care of functions like |
| 2485 | strcmp() compiled by xlc. */ |
| 2486 | |
| 2487 | record_minimal_symbol (reader, last_csect_name, last_csect_val, |
| 2488 | mst_text, last_csect_sec, objfile); |
| 2489 | misc_func_recorded = 1; |
| 2490 | } |
| 2491 | |
| 2492 | if (pst) |
| 2493 | { |
| 2494 | xcoff_end_psymtab (objfile, pst, psymtab_include_list, |
| 2495 | includes_used, symnum_before, |
| 2496 | dependency_list, dependencies_used, |
| 2497 | textlow_not_set); |
| 2498 | includes_used = 0; |
| 2499 | dependencies_used = 0; |
| 2500 | } |
| 2501 | first_fun_line_offset = 0; |
| 2502 | |
| 2503 | /* XCOFF, according to the AIX 3.2 documentation, puts the |
| 2504 | filename in cs->c_name. But xlc 1.3.0.2 has decided to |
| 2505 | do things the standard COFF way and put it in the auxent. |
| 2506 | We use the auxent if the symbol is ".file" and an auxent |
| 2507 | exists, otherwise use the symbol itself. */ |
| 2508 | if (!strcmp (namestring, ".file") && symbol.n_numaux > 0) |
| 2509 | { |
| 2510 | filestring = coff_getfilename (&main_aux[0], objfile); |
| 2511 | } |
| 2512 | else |
| 2513 | filestring = namestring; |
| 2514 | |
| 2515 | pst = xcoff_start_psymtab (objfile, |
| 2516 | filestring, |
| 2517 | symnum_before, |
| 2518 | objfile->global_psymbols.next, |
| 2519 | objfile->static_psymbols.next); |
| 2520 | last_csect_name = NULL; |
| 2521 | } |
| 2522 | break; |
| 2523 | |
| 2524 | default: |
| 2525 | { |
| 2526 | complaint (&symfile_complaints, |
| 2527 | _("Storage class %d not recognized during scan"), |
| 2528 | sclass); |
| 2529 | } |
| 2530 | /* FALLTHROUGH */ |
| 2531 | |
| 2532 | /* C_FCN is .bf and .ef symbols. I think it is sufficient |
| 2533 | to handle only the C_FUN and C_EXT. */ |
| 2534 | case C_FCN: |
| 2535 | |
| 2536 | case C_BSTAT: |
| 2537 | case C_ESTAT: |
| 2538 | case C_ARG: |
| 2539 | case C_REGPARM: |
| 2540 | case C_REG: |
| 2541 | case C_TPDEF: |
| 2542 | case C_STRTAG: |
| 2543 | case C_UNTAG: |
| 2544 | case C_ENTAG: |
| 2545 | case C_LABEL: |
| 2546 | case C_NULL: |
| 2547 | |
| 2548 | /* C_EINCL means we are switching back to the main file. But there |
| 2549 | is no reason to care; the only thing we want to know about |
| 2550 | includes is the names of all the included (.h) files. */ |
| 2551 | case C_EINCL: |
| 2552 | |
| 2553 | case C_BLOCK: |
| 2554 | |
| 2555 | /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be |
| 2556 | used instead. */ |
| 2557 | case C_STAT: |
| 2558 | |
| 2559 | /* I don't think the name of the common block (as opposed to the |
| 2560 | variables within it) is something which is user visible |
| 2561 | currently. */ |
| 2562 | case C_BCOMM: |
| 2563 | case C_ECOMM: |
| 2564 | |
| 2565 | case C_PSYM: |
| 2566 | case C_RPSYM: |
| 2567 | |
| 2568 | /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL |
| 2569 | so C_LSYM would appear to be only for locals. */ |
| 2570 | case C_LSYM: |
| 2571 | |
| 2572 | case C_AUTO: |
| 2573 | case C_RSYM: |
| 2574 | { |
| 2575 | /* We probably could save a few instructions by assuming that |
| 2576 | C_LSYM, C_PSYM, etc., never have auxents. */ |
| 2577 | int naux1 = symbol.n_numaux + 1; |
| 2578 | |
| 2579 | ssymnum += naux1; |
| 2580 | sraw_symbol += bfd_coff_symesz (abfd) * naux1; |
| 2581 | } |
| 2582 | break; |
| 2583 | |
| 2584 | case C_BINCL: |
| 2585 | { |
| 2586 | /* Mark down an include file in the current psymtab. */ |
| 2587 | enum language tmp_language; |
| 2588 | |
| 2589 | swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, |
| 2590 | &ssymnum, objfile); |
| 2591 | |
| 2592 | tmp_language = deduce_language_from_filename (namestring); |
| 2593 | |
| 2594 | /* Only change the psymtab's language if we've learned |
| 2595 | something useful (eg. tmp_language is not language_unknown). |
| 2596 | In addition, to match what start_subfile does, never change |
| 2597 | from C++ to C. */ |
| 2598 | if (tmp_language != language_unknown |
| 2599 | && (tmp_language != language_c |
| 2600 | || psymtab_language != language_cplus)) |
| 2601 | psymtab_language = tmp_language; |
| 2602 | |
| 2603 | /* In C++, one may expect the same filename to come round many |
| 2604 | times, when code is coming alternately from the main file |
| 2605 | and from inline functions in other files. So I check to see |
| 2606 | if this is a file we've seen before -- either the main |
| 2607 | source file, or a previously included file. |
| 2608 | |
| 2609 | This seems to be a lot of time to be spending on N_SOL, but |
| 2610 | things like "break c-exp.y:435" need to work (I |
| 2611 | suppose the psymtab_include_list could be hashed or put |
| 2612 | in a binary tree, if profiling shows this is a major hog). */ |
| 2613 | if (pst && strcmp (namestring, pst->filename) == 0) |
| 2614 | continue; |
| 2615 | |
| 2616 | { |
| 2617 | int i; |
| 2618 | |
| 2619 | for (i = 0; i < includes_used; i++) |
| 2620 | if (strcmp (namestring, psymtab_include_list[i]) == 0) |
| 2621 | { |
| 2622 | i = -1; |
| 2623 | break; |
| 2624 | } |
| 2625 | if (i == -1) |
| 2626 | continue; |
| 2627 | } |
| 2628 | psymtab_include_list[includes_used++] = namestring; |
| 2629 | if (includes_used >= includes_allocated) |
| 2630 | { |
| 2631 | const char **orig = psymtab_include_list; |
| 2632 | |
| 2633 | psymtab_include_list = (const char **) |
| 2634 | alloca ((includes_allocated *= 2) * |
| 2635 | sizeof (const char *)); |
| 2636 | memcpy (psymtab_include_list, orig, |
| 2637 | includes_used * sizeof (const char *)); |
| 2638 | } |
| 2639 | continue; |
| 2640 | } |
| 2641 | case C_FUN: |
| 2642 | /* The value of the C_FUN is not the address of the function (it |
| 2643 | appears to be the address before linking), but as long as it |
| 2644 | is smaller than the actual address, then find_pc_partial_function |
| 2645 | will use the minimal symbols instead. I hope. */ |
| 2646 | |
| 2647 | case C_GSYM: |
| 2648 | case C_ECOML: |
| 2649 | case C_DECL: |
| 2650 | case C_STSYM: |
| 2651 | { |
| 2652 | const char *p; |
| 2653 | |
| 2654 | swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, |
| 2655 | &ssymnum, objfile); |
| 2656 | |
| 2657 | p = strchr (namestring, ':'); |
| 2658 | if (!p) |
| 2659 | continue; /* Not a debugging symbol. */ |
| 2660 | |
| 2661 | /* Main processing section for debugging symbols which |
| 2662 | the initial read through the symbol tables needs to worry |
| 2663 | about. If we reach this point, the symbol which we are |
| 2664 | considering is definitely one we are interested in. |
| 2665 | p must also contain the (valid) index into the namestring |
| 2666 | which indicates the debugging type symbol. */ |
| 2667 | |
| 2668 | switch (p[1]) |
| 2669 | { |
| 2670 | case 'S': |
| 2671 | symbol.n_value += ANOFFSET (objfile->section_offsets, |
| 2672 | SECT_OFF_DATA (objfile)); |
| 2673 | |
| 2674 | if (gdbarch_static_transform_name_p (gdbarch)) |
| 2675 | namestring = gdbarch_static_transform_name |
| 2676 | (gdbarch, namestring); |
| 2677 | |
| 2678 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2679 | VAR_DOMAIN, LOC_STATIC, |
| 2680 | &objfile->static_psymbols, |
| 2681 | symbol.n_value, |
| 2682 | psymtab_language, objfile); |
| 2683 | continue; |
| 2684 | |
| 2685 | case 'G': |
| 2686 | symbol.n_value += ANOFFSET (objfile->section_offsets, |
| 2687 | SECT_OFF_DATA (objfile)); |
| 2688 | /* The addresses in these entries are reported to be |
| 2689 | wrong. See the code that reads 'G's for symtabs. */ |
| 2690 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2691 | VAR_DOMAIN, LOC_STATIC, |
| 2692 | &objfile->global_psymbols, |
| 2693 | symbol.n_value, |
| 2694 | psymtab_language, objfile); |
| 2695 | continue; |
| 2696 | |
| 2697 | case 'T': |
| 2698 | /* When a 'T' entry is defining an anonymous enum, it |
| 2699 | may have a name which is the empty string, or a |
| 2700 | single space. Since they're not really defining a |
| 2701 | symbol, those shouldn't go in the partial symbol |
| 2702 | table. We do pick up the elements of such enums at |
| 2703 | 'check_enum:', below. */ |
| 2704 | if (p >= namestring + 2 |
| 2705 | || (p == namestring + 1 |
| 2706 | && namestring[0] != ' ')) |
| 2707 | { |
| 2708 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2709 | STRUCT_DOMAIN, LOC_TYPEDEF, |
| 2710 | &objfile->static_psymbols, |
| 2711 | 0, psymtab_language, objfile); |
| 2712 | if (p[2] == 't') |
| 2713 | { |
| 2714 | /* Also a typedef with the same name. */ |
| 2715 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2716 | VAR_DOMAIN, LOC_TYPEDEF, |
| 2717 | &objfile->static_psymbols, |
| 2718 | 0, psymtab_language, objfile); |
| 2719 | p += 1; |
| 2720 | } |
| 2721 | } |
| 2722 | goto check_enum; |
| 2723 | |
| 2724 | case 't': |
| 2725 | if (p != namestring) /* a name is there, not just :T... */ |
| 2726 | { |
| 2727 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2728 | VAR_DOMAIN, LOC_TYPEDEF, |
| 2729 | &objfile->static_psymbols, |
| 2730 | 0, psymtab_language, objfile); |
| 2731 | } |
| 2732 | check_enum: |
| 2733 | /* If this is an enumerated type, we need to |
| 2734 | add all the enum constants to the partial symbol |
| 2735 | table. This does not cover enums without names, e.g. |
| 2736 | "enum {a, b} c;" in C, but fortunately those are |
| 2737 | rare. There is no way for GDB to find those from the |
| 2738 | enum type without spending too much time on it. Thus |
| 2739 | to solve this problem, the compiler needs to put out the |
| 2740 | enum in a nameless type. GCC2 does this. */ |
| 2741 | |
| 2742 | /* We are looking for something of the form |
| 2743 | <name> ":" ("t" | "T") [<number> "="] "e" |
| 2744 | {<constant> ":" <value> ","} ";". */ |
| 2745 | |
| 2746 | /* Skip over the colon and the 't' or 'T'. */ |
| 2747 | p += 2; |
| 2748 | /* This type may be given a number. Also, numbers can come |
| 2749 | in pairs like (0,26). Skip over it. */ |
| 2750 | while ((*p >= '0' && *p <= '9') |
| 2751 | || *p == '(' || *p == ',' || *p == ')' |
| 2752 | || *p == '=') |
| 2753 | p++; |
| 2754 | |
| 2755 | if (*p++ == 'e') |
| 2756 | { |
| 2757 | /* The aix4 compiler emits extra crud before the |
| 2758 | members. */ |
| 2759 | if (*p == '-') |
| 2760 | { |
| 2761 | /* Skip over the type (?). */ |
| 2762 | while (*p != ':') |
| 2763 | p++; |
| 2764 | |
| 2765 | /* Skip over the colon. */ |
| 2766 | p++; |
| 2767 | } |
| 2768 | |
| 2769 | /* We have found an enumerated type. */ |
| 2770 | /* According to comments in read_enum_type |
| 2771 | a comma could end it instead of a semicolon. |
| 2772 | I don't know where that happens. |
| 2773 | Accept either. */ |
| 2774 | while (*p && *p != ';' && *p != ',') |
| 2775 | { |
| 2776 | const char *q; |
| 2777 | |
| 2778 | /* Check for and handle cretinous dbx symbol name |
| 2779 | continuation! */ |
| 2780 | if (*p == '\\' || (*p == '?' && p[1] == '\0')) |
| 2781 | p = next_symbol_text (objfile); |
| 2782 | |
| 2783 | /* Point to the character after the name |
| 2784 | of the enum constant. */ |
| 2785 | for (q = p; *q && *q != ':'; q++) |
| 2786 | ; |
| 2787 | /* Note that the value doesn't matter for |
| 2788 | enum constants in psymtabs, just in symtabs. */ |
| 2789 | add_psymbol_to_list (p, q - p, 1, |
| 2790 | VAR_DOMAIN, LOC_CONST, |
| 2791 | &objfile->static_psymbols, |
| 2792 | 0, psymtab_language, objfile); |
| 2793 | /* Point past the name. */ |
| 2794 | p = q; |
| 2795 | /* Skip over the value. */ |
| 2796 | while (*p && *p != ',') |
| 2797 | p++; |
| 2798 | /* Advance past the comma. */ |
| 2799 | if (*p) |
| 2800 | p++; |
| 2801 | } |
| 2802 | } |
| 2803 | continue; |
| 2804 | |
| 2805 | case 'c': |
| 2806 | /* Constant, e.g. from "const" in Pascal. */ |
| 2807 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2808 | VAR_DOMAIN, LOC_CONST, |
| 2809 | &objfile->static_psymbols, |
| 2810 | 0, psymtab_language, objfile); |
| 2811 | continue; |
| 2812 | |
| 2813 | case 'f': |
| 2814 | if (! pst) |
| 2815 | { |
| 2816 | int name_len = p - namestring; |
| 2817 | char *name = (char *) xmalloc (name_len + 1); |
| 2818 | |
| 2819 | memcpy (name, namestring, name_len); |
| 2820 | name[name_len] = '\0'; |
| 2821 | function_outside_compilation_unit_complaint (name); |
| 2822 | xfree (name); |
| 2823 | } |
| 2824 | symbol.n_value += ANOFFSET (objfile->section_offsets, |
| 2825 | SECT_OFF_TEXT (objfile)); |
| 2826 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2827 | VAR_DOMAIN, LOC_BLOCK, |
| 2828 | &objfile->static_psymbols, |
| 2829 | symbol.n_value, |
| 2830 | psymtab_language, objfile); |
| 2831 | continue; |
| 2832 | |
| 2833 | /* Global functions were ignored here, but now they |
| 2834 | are put into the global psymtab like one would expect. |
| 2835 | They're also in the minimal symbol table. */ |
| 2836 | case 'F': |
| 2837 | if (! pst) |
| 2838 | { |
| 2839 | int name_len = p - namestring; |
| 2840 | char *name = (char *) xmalloc (name_len + 1); |
| 2841 | |
| 2842 | memcpy (name, namestring, name_len); |
| 2843 | name[name_len] = '\0'; |
| 2844 | function_outside_compilation_unit_complaint (name); |
| 2845 | xfree (name); |
| 2846 | } |
| 2847 | |
| 2848 | /* We need only the minimal symbols for these |
| 2849 | loader-generated definitions. Keeping the global |
| 2850 | symbols leads to "in psymbols but not in symbols" |
| 2851 | errors. */ |
| 2852 | if (startswith (namestring, "@FIX")) |
| 2853 | continue; |
| 2854 | |
| 2855 | symbol.n_value += ANOFFSET (objfile->section_offsets, |
| 2856 | SECT_OFF_TEXT (objfile)); |
| 2857 | add_psymbol_to_list (namestring, p - namestring, 1, |
| 2858 | VAR_DOMAIN, LOC_BLOCK, |
| 2859 | &objfile->global_psymbols, |
| 2860 | symbol.n_value, |
| 2861 | psymtab_language, objfile); |
| 2862 | continue; |
| 2863 | |
| 2864 | /* Two things show up here (hopefully); static symbols of |
| 2865 | local scope (static used inside braces) or extensions |
| 2866 | of structure symbols. We can ignore both. */ |
| 2867 | case 'V': |
| 2868 | case '(': |
| 2869 | case '0': |
| 2870 | case '1': |
| 2871 | case '2': |
| 2872 | case '3': |
| 2873 | case '4': |
| 2874 | case '5': |
| 2875 | case '6': |
| 2876 | case '7': |
| 2877 | case '8': |
| 2878 | case '9': |
| 2879 | case '-': |
| 2880 | case '#': /* For symbol identification (used in |
| 2881 | live ranges). */ |
| 2882 | continue; |
| 2883 | |
| 2884 | case ':': |
| 2885 | /* It is a C++ nested symbol. We don't need to record it |
| 2886 | (I don't think); if we try to look up foo::bar::baz, |
| 2887 | then symbols for the symtab containing foo should get |
| 2888 | read in, I think. */ |
| 2889 | /* Someone says sun cc puts out symbols like |
| 2890 | /foo/baz/maclib::/usr/local/bin/maclib, |
| 2891 | which would get here with a symbol type of ':'. */ |
| 2892 | continue; |
| 2893 | |
| 2894 | default: |
| 2895 | /* Unexpected symbol descriptor. The second and |
| 2896 | subsequent stabs of a continued stab can show up |
| 2897 | here. The question is whether they ever can mimic |
| 2898 | a normal stab--it would be nice if not, since we |
| 2899 | certainly don't want to spend the time searching to |
| 2900 | the end of every string looking for a |
| 2901 | backslash. */ |
| 2902 | |
| 2903 | complaint (&symfile_complaints, |
| 2904 | _("unknown symbol descriptor `%c'"), p[1]); |
| 2905 | |
| 2906 | /* Ignore it; perhaps it is an extension that we don't |
| 2907 | know about. */ |
| 2908 | continue; |
| 2909 | } |
| 2910 | } |
| 2911 | } |
| 2912 | } |
| 2913 | |
| 2914 | if (pst) |
| 2915 | { |
| 2916 | xcoff_end_psymtab (objfile, pst, psymtab_include_list, includes_used, |
| 2917 | ssymnum, dependency_list, |
| 2918 | dependencies_used, textlow_not_set); |
| 2919 | } |
| 2920 | |
| 2921 | /* Record the toc offset value of this symbol table into objfile |
| 2922 | structure. If no XMC_TC0 is found, toc_offset should be zero. |
| 2923 | Another place to obtain this information would be file auxiliary |
| 2924 | header. */ |
| 2925 | |
| 2926 | XCOFF_DATA (objfile)->toc_offset = toc_offset; |
| 2927 | } |
| 2928 | |
| 2929 | /* Return the toc offset value for a given objfile. */ |
| 2930 | |
| 2931 | CORE_ADDR |
| 2932 | xcoff_get_toc_offset (struct objfile *objfile) |
| 2933 | { |
| 2934 | if (objfile) |
| 2935 | return XCOFF_DATA (objfile)->toc_offset; |
| 2936 | return 0; |
| 2937 | } |
| 2938 | |
| 2939 | /* Scan and build partial symbols for a symbol file. |
| 2940 | We have been initialized by a call to dbx_symfile_init, which |
| 2941 | put all the relevant info into a "struct dbx_symfile_info", |
| 2942 | hung off the objfile structure. |
| 2943 | |
| 2944 | SECTION_OFFSETS contains offsets relative to which the symbols in the |
| 2945 | various sections are (depending where the sections were actually |
| 2946 | loaded). */ |
| 2947 | |
| 2948 | static void |
| 2949 | xcoff_initial_scan (struct objfile *objfile, symfile_add_flags symfile_flags) |
| 2950 | { |
| 2951 | bfd *abfd; |
| 2952 | int val; |
| 2953 | struct cleanup *back_to; |
| 2954 | int num_symbols; /* # of symbols */ |
| 2955 | file_ptr symtab_offset; /* symbol table and */ |
| 2956 | file_ptr stringtab_offset; /* string table file offsets */ |
| 2957 | struct coff_symfile_info *info; |
| 2958 | const char *name; |
| 2959 | unsigned int size; |
| 2960 | |
| 2961 | info = XCOFF_DATA (objfile); |
| 2962 | symfile_bfd = abfd = objfile->obfd; |
| 2963 | name = objfile_name (objfile); |
| 2964 | |
| 2965 | num_symbols = bfd_get_symcount (abfd); /* # of symbols */ |
| 2966 | symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */ |
| 2967 | stringtab_offset = symtab_offset + |
| 2968 | num_symbols * coff_data (abfd)->local_symesz; |
| 2969 | |
| 2970 | info->min_lineno_offset = 0; |
| 2971 | info->max_lineno_offset = 0; |
| 2972 | bfd_map_over_sections (abfd, find_linenos, info); |
| 2973 | |
| 2974 | if (num_symbols > 0) |
| 2975 | { |
| 2976 | /* Read the string table. */ |
| 2977 | init_stringtab (abfd, stringtab_offset, objfile); |
| 2978 | |
| 2979 | /* Read the .debug section, if present. */ |
| 2980 | { |
| 2981 | struct bfd_section *secp; |
| 2982 | bfd_size_type length; |
| 2983 | bfd_byte *debugsec = NULL; |
| 2984 | |
| 2985 | secp = bfd_get_section_by_name (abfd, ".debug"); |
| 2986 | if (secp) |
| 2987 | { |
| 2988 | length = bfd_section_size (abfd, secp); |
| 2989 | if (length) |
| 2990 | { |
| 2991 | debugsec |
| 2992 | = (bfd_byte *) obstack_alloc (&objfile->objfile_obstack, |
| 2993 | length); |
| 2994 | |
| 2995 | if (!bfd_get_full_section_contents (abfd, secp, &debugsec)) |
| 2996 | { |
| 2997 | error (_("Error reading .debug section of `%s': %s"), |
| 2998 | name, bfd_errmsg (bfd_get_error ())); |
| 2999 | } |
| 3000 | } |
| 3001 | } |
| 3002 | info->debugsec = (char *) debugsec; |
| 3003 | } |
| 3004 | } |
| 3005 | |
| 3006 | /* Read the symbols. We keep them in core because we will want to |
| 3007 | access them randomly in read_symbol*. */ |
| 3008 | val = bfd_seek (abfd, symtab_offset, SEEK_SET); |
| 3009 | if (val < 0) |
| 3010 | error (_("Error reading symbols from %s: %s"), |
| 3011 | name, bfd_errmsg (bfd_get_error ())); |
| 3012 | size = coff_data (abfd)->local_symesz * num_symbols; |
| 3013 | info->symtbl = (char *) obstack_alloc (&objfile->objfile_obstack, size); |
| 3014 | info->symtbl_num_syms = num_symbols; |
| 3015 | |
| 3016 | val = bfd_bread (info->symtbl, size, abfd); |
| 3017 | if (val != size) |
| 3018 | perror_with_name (_("reading symbol table")); |
| 3019 | |
| 3020 | /* If we are reinitializing, or if we have never loaded syms yet, init. */ |
| 3021 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
| 3022 | /* I'm not sure how how good num_symbols is; the rule of thumb in |
| 3023 | init_psymbol_list was developed for a.out. On the one hand, |
| 3024 | num_symbols includes auxents. On the other hand, it doesn't |
| 3025 | include N_SLINE. */ |
| 3026 | init_psymbol_list (objfile, num_symbols); |
| 3027 | |
| 3028 | free_pending_blocks (); |
| 3029 | back_to = make_cleanup (really_free_pendings, 0); |
| 3030 | |
| 3031 | minimal_symbol_reader reader (objfile); |
| 3032 | |
| 3033 | /* Now that the symbol table data of the executable file are all in core, |
| 3034 | process them and define symbols accordingly. */ |
| 3035 | |
| 3036 | scan_xcoff_symtab (reader, objfile); |
| 3037 | |
| 3038 | /* Install any minimal symbols that have been collected as the current |
| 3039 | minimal symbols for this objfile. */ |
| 3040 | |
| 3041 | reader.install (); |
| 3042 | |
| 3043 | /* DWARF2 sections. */ |
| 3044 | |
| 3045 | if (dwarf2_has_info (objfile, &dwarf2_xcoff_names)) |
| 3046 | dwarf2_build_psymtabs (objfile); |
| 3047 | |
| 3048 | dwarf2_build_frame_info (objfile); |
| 3049 | |
| 3050 | do_cleanups (back_to); |
| 3051 | } |
| 3052 | \f |
| 3053 | static void |
| 3054 | xcoff_symfile_offsets (struct objfile *objfile, |
| 3055 | const struct section_addr_info *addrs) |
| 3056 | { |
| 3057 | const char *first_section_name; |
| 3058 | |
| 3059 | default_symfile_offsets (objfile, addrs); |
| 3060 | |
| 3061 | /* Oneof the weird side-effects of default_symfile_offsets is that |
| 3062 | it sometimes sets some section indices to zero for sections that, |
| 3063 | in fact do not exist. See the body of default_symfile_offsets |
| 3064 | for more info on when that happens. Undo that, as this then allows |
| 3065 | us to test whether the associated section exists or not, and then |
| 3066 | access it quickly (without searching it again). */ |
| 3067 | |
| 3068 | if (objfile->num_sections == 0) |
| 3069 | return; /* Is that even possible? Better safe than sorry. */ |
| 3070 | |
| 3071 | first_section_name |
| 3072 | = bfd_section_name (objfile->obfd, objfile->sections[0].the_bfd_section); |
| 3073 | |
| 3074 | if (objfile->sect_index_text == 0 |
| 3075 | && strcmp (first_section_name, ".text") != 0) |
| 3076 | objfile->sect_index_text = -1; |
| 3077 | |
| 3078 | if (objfile->sect_index_data == 0 |
| 3079 | && strcmp (first_section_name, ".data") != 0) |
| 3080 | objfile->sect_index_data = -1; |
| 3081 | |
| 3082 | if (objfile->sect_index_bss == 0 |
| 3083 | && strcmp (first_section_name, ".bss") != 0) |
| 3084 | objfile->sect_index_bss = -1; |
| 3085 | |
| 3086 | if (objfile->sect_index_rodata == 0 |
| 3087 | && strcmp (first_section_name, ".rodata") != 0) |
| 3088 | objfile->sect_index_rodata = -1; |
| 3089 | } |
| 3090 | |
| 3091 | /* Register our ability to parse symbols for xcoff BFD files. */ |
| 3092 | |
| 3093 | static const struct sym_fns xcoff_sym_fns = |
| 3094 | { |
| 3095 | |
| 3096 | /* It is possible that coff and xcoff should be merged as |
| 3097 | they do have fundamental similarities (for example, the extra storage |
| 3098 | classes used for stabs could presumably be recognized in any COFF file). |
| 3099 | However, in addition to obvious things like all the csect hair, there are |
| 3100 | some subtler differences between xcoffread.c and coffread.c, notably |
| 3101 | the fact that coffread.c has no need to read in all the symbols, but |
| 3102 | xcoffread.c reads all the symbols and does in fact randomly access them |
| 3103 | (in C_BSTAT and line number processing). */ |
| 3104 | |
| 3105 | xcoff_new_init, /* init anything gbl to entire symtab */ |
| 3106 | xcoff_symfile_init, /* read initial info, setup for sym_read() */ |
| 3107 | xcoff_initial_scan, /* read a symbol file into symtab */ |
| 3108 | NULL, /* sym_read_psymbols */ |
| 3109 | xcoff_symfile_finish, /* finished with file, cleanup */ |
| 3110 | xcoff_symfile_offsets, /* xlate offsets ext->int form */ |
| 3111 | default_symfile_segments, /* Get segment information from a file. */ |
| 3112 | aix_process_linenos, |
| 3113 | default_symfile_relocate, /* Relocate a debug section. */ |
| 3114 | NULL, /* sym_probe_fns */ |
| 3115 | &psym_functions |
| 3116 | }; |
| 3117 | |
| 3118 | /* Same as xcoff_get_n_import_files, but for core files. */ |
| 3119 | |
| 3120 | static int |
| 3121 | xcoff_get_core_n_import_files (bfd *abfd) |
| 3122 | { |
| 3123 | asection *sect = bfd_get_section_by_name (abfd, ".ldinfo"); |
| 3124 | gdb_byte buf[4]; |
| 3125 | file_ptr offset = 0; |
| 3126 | int n_entries = 0; |
| 3127 | |
| 3128 | if (sect == NULL) |
| 3129 | return -1; /* Not a core file. */ |
| 3130 | |
| 3131 | for (offset = 0; offset < bfd_get_section_size (sect);) |
| 3132 | { |
| 3133 | int next; |
| 3134 | |
| 3135 | n_entries++; |
| 3136 | |
| 3137 | if (!bfd_get_section_contents (abfd, sect, buf, offset, 4)) |
| 3138 | return -1; |
| 3139 | next = bfd_get_32 (abfd, buf); |
| 3140 | if (next == 0) |
| 3141 | break; /* This is the last entry. */ |
| 3142 | offset += next; |
| 3143 | } |
| 3144 | |
| 3145 | /* Return the number of entries, excluding the first one, which is |
| 3146 | the path to the executable that produced this core file. */ |
| 3147 | return n_entries - 1; |
| 3148 | } |
| 3149 | |
| 3150 | /* Return the number of import files (shared libraries) that the given |
| 3151 | BFD depends on. Return -1 if this number could not be computed. */ |
| 3152 | |
| 3153 | int |
| 3154 | xcoff_get_n_import_files (bfd *abfd) |
| 3155 | { |
| 3156 | asection *sect = bfd_get_section_by_name (abfd, ".loader"); |
| 3157 | gdb_byte buf[4]; |
| 3158 | int l_nimpid; |
| 3159 | |
| 3160 | /* If the ".loader" section does not exist, the objfile is probably |
| 3161 | not an executable. Might be a core file... */ |
| 3162 | if (sect == NULL) |
| 3163 | return xcoff_get_core_n_import_files (abfd); |
| 3164 | |
| 3165 | /* The number of entries in the Import Files Table is stored in |
| 3166 | field l_nimpid. This field is always at offset 16, and is |
| 3167 | always 4 bytes long. Read those 4 bytes. */ |
| 3168 | |
| 3169 | if (!bfd_get_section_contents (abfd, sect, buf, 16, 4)) |
| 3170 | return -1; |
| 3171 | l_nimpid = bfd_get_32 (abfd, buf); |
| 3172 | |
| 3173 | /* By convention, the first entry is the default LIBPATH value |
| 3174 | to be used by the system loader, so it does not count towards |
| 3175 | the number of import files. */ |
| 3176 | return l_nimpid - 1; |
| 3177 | } |
| 3178 | |
| 3179 | /* Free the per-objfile xcoff data. */ |
| 3180 | |
| 3181 | static void |
| 3182 | xcoff_free_info (struct objfile *objfile, void *arg) |
| 3183 | { |
| 3184 | xfree (arg); |
| 3185 | } |
| 3186 | |
| 3187 | void |
| 3188 | _initialize_xcoffread (void) |
| 3189 | { |
| 3190 | add_symtab_fns (bfd_target_xcoff_flavour, &xcoff_sym_fns); |
| 3191 | |
| 3192 | xcoff_objfile_data_key = register_objfile_data_with_cleanup (NULL, |
| 3193 | xcoff_free_info); |
| 3194 | } |