| 1 | /* Read apollo DST symbol tables and convert to internal format, for GDB. |
| 2 | Contributed by Troy Rollo, University of NSW (troy@cbme.unsw.edu.au). |
| 3 | Copyright 1993 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | \f |
| 22 | #include "defs.h" |
| 23 | #include "symtab.h" |
| 24 | #include "gdbtypes.h" |
| 25 | #include "breakpoint.h" |
| 26 | #include "bfd.h" |
| 27 | #include "symfile.h" |
| 28 | #include "objfiles.h" |
| 29 | #include "buildsym.h" |
| 30 | #include "obstack.h" |
| 31 | |
| 32 | #include "gdb_string.h" |
| 33 | |
| 34 | #include "dst.h" |
| 35 | |
| 36 | CORE_ADDR cur_src_start_addr, cur_src_end_addr; |
| 37 | dst_sec blocks_info, lines_info, symbols_info; |
| 38 | |
| 39 | /* Vector of line number information. */ |
| 40 | |
| 41 | static struct linetable *line_vector; |
| 42 | |
| 43 | /* Index of next entry to go in line_vector_index. */ |
| 44 | |
| 45 | static int line_vector_index; |
| 46 | |
| 47 | /* Last line number recorded in the line vector. */ |
| 48 | |
| 49 | static int prev_line_number; |
| 50 | |
| 51 | /* Number of elements allocated for line_vector currently. */ |
| 52 | |
| 53 | static int line_vector_length; |
| 54 | |
| 55 | static int init_dst_sections (int); |
| 56 | |
| 57 | static void read_dst_symtab (struct objfile *); |
| 58 | |
| 59 | static void find_dst_sections (bfd *, sec_ptr, PTR); |
| 60 | |
| 61 | static void dst_symfile_init (struct objfile *); |
| 62 | |
| 63 | static void dst_new_init (struct objfile *); |
| 64 | |
| 65 | static void dst_symfile_read (struct objfile *, int); |
| 66 | |
| 67 | static void dst_symfile_finish (struct objfile *); |
| 68 | |
| 69 | static void dst_end_symtab (struct objfile *); |
| 70 | |
| 71 | static void complete_symtab (char *, CORE_ADDR, unsigned int); |
| 72 | |
| 73 | static void dst_start_symtab (void); |
| 74 | |
| 75 | static void dst_record_line (int, CORE_ADDR); |
| 76 | |
| 77 | /* Manage the vector of line numbers. */ |
| 78 | /* FIXME: Use record_line instead. */ |
| 79 | |
| 80 | static void |
| 81 | dst_record_line (int line, CORE_ADDR pc) |
| 82 | { |
| 83 | struct linetable_entry *e; |
| 84 | /* Make sure line vector is big enough. */ |
| 85 | |
| 86 | if (line_vector_index + 2 >= line_vector_length) |
| 87 | { |
| 88 | line_vector_length *= 2; |
| 89 | line_vector = (struct linetable *) |
| 90 | xrealloc ((char *) line_vector, sizeof (struct linetable) |
| 91 | + (line_vector_length |
| 92 | * sizeof (struct linetable_entry))); |
| 93 | } |
| 94 | |
| 95 | e = line_vector->item + line_vector_index++; |
| 96 | e->line = line; |
| 97 | e->pc = pc; |
| 98 | } |
| 99 | \f |
| 100 | /* Start a new symtab for a new source file. |
| 101 | It indicates the start of data for one original source file. */ |
| 102 | /* FIXME: use start_symtab, like coffread.c now does. */ |
| 103 | |
| 104 | static void |
| 105 | dst_start_symtab (void) |
| 106 | { |
| 107 | /* Initialize the source file line number information for this file. */ |
| 108 | |
| 109 | if (line_vector) /* Unlikely, but maybe possible? */ |
| 110 | free ((PTR) line_vector); |
| 111 | line_vector_index = 0; |
| 112 | line_vector_length = 1000; |
| 113 | prev_line_number = -2; /* Force first line number to be explicit */ |
| 114 | line_vector = (struct linetable *) |
| 115 | xmalloc (sizeof (struct linetable) |
| 116 | + line_vector_length * sizeof (struct linetable_entry)); |
| 117 | } |
| 118 | |
| 119 | /* Save the vital information from when starting to read a file, |
| 120 | for use when closing off the current file. |
| 121 | NAME is the file name the symbols came from, START_ADDR is the first |
| 122 | text address for the file, and SIZE is the number of bytes of text. */ |
| 123 | |
| 124 | static void |
| 125 | complete_symtab (char *name, CORE_ADDR start_addr, unsigned int size) |
| 126 | { |
| 127 | last_source_file = savestring (name, strlen (name)); |
| 128 | cur_src_start_addr = start_addr; |
| 129 | cur_src_end_addr = start_addr + size; |
| 130 | |
| 131 | if (current_objfile->ei.entry_point >= cur_src_start_addr && |
| 132 | current_objfile->ei.entry_point < cur_src_end_addr) |
| 133 | { |
| 134 | current_objfile->ei.entry_file_lowpc = cur_src_start_addr; |
| 135 | current_objfile->ei.entry_file_highpc = cur_src_end_addr; |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | /* Finish the symbol definitions for one main source file, |
| 140 | close off all the lexical contexts for that file |
| 141 | (creating struct block's for them), then make the |
| 142 | struct symtab for that file and put it in the list of all such. */ |
| 143 | /* FIXME: Use end_symtab, like coffread.c now does. */ |
| 144 | |
| 145 | static void |
| 146 | dst_end_symtab (struct objfile *objfile) |
| 147 | { |
| 148 | register struct symtab *symtab; |
| 149 | register struct blockvector *blockvector; |
| 150 | register struct linetable *lv; |
| 151 | |
| 152 | /* Create the blockvector that points to all the file's blocks. */ |
| 153 | |
| 154 | blockvector = make_blockvector (objfile); |
| 155 | |
| 156 | /* Now create the symtab object for this source file. */ |
| 157 | symtab = allocate_symtab (last_source_file, objfile); |
| 158 | |
| 159 | /* Fill in its components. */ |
| 160 | symtab->blockvector = blockvector; |
| 161 | symtab->free_code = free_linetable; |
| 162 | symtab->free_ptr = 0; |
| 163 | symtab->filename = last_source_file; |
| 164 | symtab->dirname = NULL; |
| 165 | symtab->debugformat = obsavestring ("Apollo DST", 10, |
| 166 | &objfile->symbol_obstack); |
| 167 | lv = line_vector; |
| 168 | lv->nitems = line_vector_index; |
| 169 | symtab->linetable = (struct linetable *) |
| 170 | xrealloc ((char *) lv, (sizeof (struct linetable) |
| 171 | + lv->nitems * sizeof (struct linetable_entry))); |
| 172 | |
| 173 | free_named_symtabs (symtab->filename); |
| 174 | |
| 175 | /* Reinitialize for beginning of new file. */ |
| 176 | line_vector = 0; |
| 177 | line_vector_length = -1; |
| 178 | last_source_file = NULL; |
| 179 | } |
| 180 | \f |
| 181 | /* dst_symfile_init () |
| 182 | is the dst-specific initialization routine for reading symbols. |
| 183 | |
| 184 | We will only be called if this is a DST or DST-like file. |
| 185 | BFD handles figuring out the format of the file, and code in symtab.c |
| 186 | uses BFD's determination to vector to us. |
| 187 | |
| 188 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ |
| 189 | |
| 190 | static void |
| 191 | dst_symfile_init (struct objfile *objfile) |
| 192 | { |
| 193 | asection *section; |
| 194 | bfd *abfd = objfile->obfd; |
| 195 | |
| 196 | init_entry_point_info (objfile); |
| 197 | |
| 198 | } |
| 199 | |
| 200 | /* This function is called for every section; it finds the outer limits |
| 201 | of the line table (minimum and maximum file offset) so that the |
| 202 | mainline code can read the whole thing for efficiency. */ |
| 203 | |
| 204 | /* ARGSUSED */ |
| 205 | static void |
| 206 | find_dst_sections (bfd *abfd, sec_ptr asect, PTR vpinfo) |
| 207 | { |
| 208 | int size, count; |
| 209 | long base; |
| 210 | file_ptr offset, maxoff; |
| 211 | dst_sec *section; |
| 212 | |
| 213 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
| 214 | size = asect->_raw_size; |
| 215 | offset = asect->filepos; |
| 216 | base = asect->vma; |
| 217 | /* End of warning */ |
| 218 | |
| 219 | section = NULL; |
| 220 | if (!strcmp (asect->name, ".blocks")) |
| 221 | section = &blocks_info; |
| 222 | else if (!strcmp (asect->name, ".lines")) |
| 223 | section = &lines_info; |
| 224 | else if (!strcmp (asect->name, ".symbols")) |
| 225 | section = &symbols_info; |
| 226 | if (!section) |
| 227 | return; |
| 228 | section->size = size; |
| 229 | section->position = offset; |
| 230 | section->base = base; |
| 231 | } |
| 232 | |
| 233 | |
| 234 | /* The BFD for this file -- only good while we're actively reading |
| 235 | symbols into a psymtab or a symtab. */ |
| 236 | |
| 237 | static bfd *symfile_bfd; |
| 238 | |
| 239 | /* Read a symbol file, after initialization by dst_symfile_init. */ |
| 240 | /* FIXME! Addr and Mainline are not used yet -- this will not work for |
| 241 | shared libraries or add_file! */ |
| 242 | |
| 243 | /* ARGSUSED */ |
| 244 | static void |
| 245 | dst_symfile_read (struct objfile *objfile, int mainline) |
| 246 | { |
| 247 | bfd *abfd = objfile->obfd; |
| 248 | char *name = bfd_get_filename (abfd); |
| 249 | int desc; |
| 250 | register int val; |
| 251 | int num_symbols; |
| 252 | int symtab_offset; |
| 253 | int stringtab_offset; |
| 254 | |
| 255 | symfile_bfd = abfd; /* Kludge for swap routines */ |
| 256 | |
| 257 | /* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ |
| 258 | desc = fileno ((FILE *) (abfd->iostream)); /* File descriptor */ |
| 259 | |
| 260 | /* Read the line number table, all at once. */ |
| 261 | bfd_map_over_sections (abfd, find_dst_sections, (PTR) NULL); |
| 262 | |
| 263 | val = init_dst_sections (desc); |
| 264 | if (val < 0) |
| 265 | error ("\"%s\": error reading debugging symbol tables\n", name); |
| 266 | |
| 267 | init_minimal_symbol_collection (); |
| 268 | make_cleanup_discard_minimal_symbols (); |
| 269 | |
| 270 | /* Now that the executable file is positioned at symbol table, |
| 271 | process it and define symbols accordingly. */ |
| 272 | |
| 273 | read_dst_symtab (objfile); |
| 274 | |
| 275 | /* Sort symbols alphabetically within each block. */ |
| 276 | |
| 277 | { |
| 278 | struct symtab *s; |
| 279 | for (s = objfile->symtabs; s != NULL; s = s->next) |
| 280 | { |
| 281 | sort_symtab_syms (s); |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | /* Install any minimal symbols that have been collected as the current |
| 286 | minimal symbols for this objfile. */ |
| 287 | |
| 288 | install_minimal_symbols (objfile); |
| 289 | } |
| 290 | |
| 291 | static void |
| 292 | dst_new_init (struct objfile *ignore) |
| 293 | { |
| 294 | /* Nothin' to do */ |
| 295 | } |
| 296 | |
| 297 | /* Perform any local cleanups required when we are done with a particular |
| 298 | objfile. I.E, we are in the process of discarding all symbol information |
| 299 | for an objfile, freeing up all memory held for it, and unlinking the |
| 300 | objfile struct from the global list of known objfiles. */ |
| 301 | |
| 302 | static void |
| 303 | dst_symfile_finish (struct objfile *objfile) |
| 304 | { |
| 305 | /* Nothing to do */ |
| 306 | } |
| 307 | \f |
| 308 | |
| 309 | /* Get the next line number from the DST. Returns 0 when we hit an |
| 310 | * end directive or cannot continue for any other reason. |
| 311 | * |
| 312 | * Note that ordinary pc deltas are multiplied by two. Apparently |
| 313 | * this is what was really intended. |
| 314 | */ |
| 315 | static int |
| 316 | get_dst_line (signed char **buffer, long *pc) |
| 317 | { |
| 318 | static last_pc = 0; |
| 319 | static long last_line = 0; |
| 320 | static int last_file = 0; |
| 321 | dst_ln_entry_ptr_t entry; |
| 322 | int size; |
| 323 | dst_src_loc_t *src_loc; |
| 324 | |
| 325 | if (*pc != -1) |
| 326 | { |
| 327 | last_pc = *pc; |
| 328 | *pc = -1; |
| 329 | } |
| 330 | entry = (dst_ln_entry_ptr_t) * buffer; |
| 331 | |
| 332 | while (dst_ln_ln_delta (*entry) == dst_ln_escape_flag) |
| 333 | { |
| 334 | switch (entry->esc.esc_code) |
| 335 | { |
| 336 | case dst_ln_pad: |
| 337 | size = 1; /* pad byte */ |
| 338 | break; |
| 339 | case dst_ln_file: |
| 340 | /* file escape. Next 4 bytes are a dst_src_loc_t */ |
| 341 | size = 5; |
| 342 | src_loc = (dst_src_loc_t *) (*buffer + 1); |
| 343 | last_line = src_loc->line_number; |
| 344 | last_file = src_loc->file_index; |
| 345 | break; |
| 346 | case dst_ln_dln1_dpc1: |
| 347 | /* 1 byte line delta, 1 byte pc delta */ |
| 348 | last_line += (*buffer)[1]; |
| 349 | last_pc += 2 * (unsigned char) (*buffer)[2]; |
| 350 | dst_record_line (last_line, last_pc); |
| 351 | size = 3; |
| 352 | break; |
| 353 | case dst_ln_dln2_dpc2: |
| 354 | /* 2 bytes line delta, 2 bytes pc delta */ |
| 355 | last_line += *(short *) (*buffer + 1); |
| 356 | last_pc += 2 * (*(short *) (*buffer + 3)); |
| 357 | size = 5; |
| 358 | dst_record_line (last_line, last_pc); |
| 359 | break; |
| 360 | case dst_ln_ln4_pc4: |
| 361 | /* 4 bytes ABSOLUTE line number, 4 bytes ABSOLUTE pc */ |
| 362 | last_line = *(unsigned long *) (*buffer + 1); |
| 363 | last_pc = *(unsigned long *) (*buffer + 5); |
| 364 | size = 9; |
| 365 | dst_record_line (last_line, last_pc); |
| 366 | break; |
| 367 | case dst_ln_dln1_dpc0: |
| 368 | /* 1 byte line delta, pc delta = 0 */ |
| 369 | size = 2; |
| 370 | last_line += (*buffer)[1]; |
| 371 | break; |
| 372 | case dst_ln_ln_off_1: |
| 373 | /* statement escape, stmt # = 1 (2nd stmt on line) */ |
| 374 | size = 1; |
| 375 | break; |
| 376 | case dst_ln_ln_off: |
| 377 | /* statement escape, stmt # = next byte */ |
| 378 | size = 2; |
| 379 | break; |
| 380 | case dst_ln_entry: |
| 381 | /* entry escape, next byte is entry number */ |
| 382 | size = 2; |
| 383 | break; |
| 384 | case dst_ln_exit: |
| 385 | /* exit escape */ |
| 386 | size = 1; |
| 387 | break; |
| 388 | case dst_ln_stmt_end: |
| 389 | /* gap escape, 4 bytes pc delta */ |
| 390 | size = 5; |
| 391 | /* last_pc += 2 * (*(long *) (*buffer + 1)); */ |
| 392 | /* Apparently this isn't supposed to actually modify |
| 393 | * the pc value. Totally weird. |
| 394 | */ |
| 395 | break; |
| 396 | case dst_ln_escape_11: |
| 397 | case dst_ln_escape_12: |
| 398 | case dst_ln_escape_13: |
| 399 | size = 1; |
| 400 | break; |
| 401 | case dst_ln_nxt_byte: |
| 402 | /* This shouldn't happen. If it does, we're SOL */ |
| 403 | return 0; |
| 404 | break; |
| 405 | case dst_ln_end: |
| 406 | /* end escape, final entry follows */ |
| 407 | return 0; |
| 408 | } |
| 409 | *buffer += (size < 0) ? -size : size; |
| 410 | entry = (dst_ln_entry_ptr_t) * buffer; |
| 411 | } |
| 412 | last_line += dst_ln_ln_delta (*entry); |
| 413 | last_pc += entry->delta.pc_delta * 2; |
| 414 | (*buffer)++; |
| 415 | dst_record_line (last_line, last_pc); |
| 416 | return 1; |
| 417 | } |
| 418 | |
| 419 | static void |
| 420 | enter_all_lines (char *buffer, long address) |
| 421 | { |
| 422 | if (buffer) |
| 423 | while (get_dst_line (&buffer, &address)); |
| 424 | } |
| 425 | |
| 426 | static int |
| 427 | get_dst_entry (char *buffer, dst_rec_ptr_t *ret_entry) |
| 428 | { |
| 429 | int size; |
| 430 | dst_rec_ptr_t entry; |
| 431 | static int last_type; |
| 432 | int ar_size; |
| 433 | static unsigned lu3; |
| 434 | |
| 435 | entry = (dst_rec_ptr_t) buffer; |
| 436 | switch (entry->rec_type) |
| 437 | { |
| 438 | case dst_typ_pad: |
| 439 | size = 0; |
| 440 | break; |
| 441 | case dst_typ_comp_unit: |
| 442 | size = sizeof (DST_comp_unit (entry)); |
| 443 | break; |
| 444 | case dst_typ_section_tab: |
| 445 | size = sizeof (DST_section_tab (entry)) |
| 446 | + ((int) DST_section_tab (entry).number_of_sections |
| 447 | - dst_dummy_array_size) * sizeof (long); |
| 448 | break; |
| 449 | case dst_typ_file_tab: |
| 450 | size = sizeof (DST_file_tab (entry)) |
| 451 | + ((int) DST_file_tab (entry).number_of_files |
| 452 | - dst_dummy_array_size) * sizeof (dst_file_desc_t); |
| 453 | break; |
| 454 | case dst_typ_block: |
| 455 | size = sizeof (DST_block (entry)) |
| 456 | + ((int) DST_block (entry).n_of_code_ranges |
| 457 | - dst_dummy_array_size) * sizeof (dst_code_range_t); |
| 458 | break; |
| 459 | case dst_typ_5: |
| 460 | size = -1; |
| 461 | break; |
| 462 | case dst_typ_var: |
| 463 | size = sizeof (DST_var (entry)) - |
| 464 | sizeof (dst_var_loc_long_t) * dst_dummy_array_size + |
| 465 | DST_var (entry).no_of_locs * |
| 466 | (DST_var (entry).short_locs ? |
| 467 | sizeof (dst_var_loc_short_t) : |
| 468 | sizeof (dst_var_loc_long_t)); |
| 469 | break; |
| 470 | case dst_typ_pointer: |
| 471 | size = sizeof (DST_pointer (entry)); |
| 472 | break; |
| 473 | case dst_typ_array: |
| 474 | size = sizeof (DST_array (entry)); |
| 475 | break; |
| 476 | case dst_typ_subrange: |
| 477 | size = sizeof (DST_subrange (entry)); |
| 478 | break; |
| 479 | case dst_typ_set: |
| 480 | size = sizeof (DST_set (entry)); |
| 481 | break; |
| 482 | case dst_typ_implicit_enum: |
| 483 | size = sizeof (DST_implicit_enum (entry)) |
| 484 | + ((int) DST_implicit_enum (entry).nelems |
| 485 | - dst_dummy_array_size) * sizeof (dst_rel_offset_t); |
| 486 | break; |
| 487 | case dst_typ_explicit_enum: |
| 488 | size = sizeof (DST_explicit_enum (entry)) |
| 489 | + ((int) DST_explicit_enum (entry).nelems |
| 490 | - dst_dummy_array_size) * sizeof (dst_enum_elem_t); |
| 491 | break; |
| 492 | case dst_typ_short_rec: |
| 493 | size = sizeof (DST_short_rec (entry)) |
| 494 | + DST_short_rec (entry).nfields * sizeof (dst_short_field_t) |
| 495 | - dst_dummy_array_size * sizeof (dst_field_t); |
| 496 | break; |
| 497 | case dst_typ_short_union: |
| 498 | size = sizeof (DST_short_union (entry)) |
| 499 | + DST_short_union (entry).nfields * sizeof (dst_short_field_t) |
| 500 | - dst_dummy_array_size * sizeof (dst_field_t); |
| 501 | break; |
| 502 | case dst_typ_file: |
| 503 | size = sizeof (DST_file (entry)); |
| 504 | break; |
| 505 | case dst_typ_offset: |
| 506 | size = sizeof (DST_offset (entry)); |
| 507 | break; |
| 508 | case dst_typ_alias: |
| 509 | size = sizeof (DST_alias (entry)); |
| 510 | break; |
| 511 | case dst_typ_signature: |
| 512 | size = sizeof (DST_signature (entry)) + |
| 513 | ((int) DST_signature (entry).nargs - |
| 514 | dst_dummy_array_size) * sizeof (dst_arg_t); |
| 515 | break; |
| 516 | case dst_typ_21: |
| 517 | size = -1; |
| 518 | break; |
| 519 | case dst_typ_old_label: |
| 520 | size = sizeof (DST_old_label (entry)); |
| 521 | break; |
| 522 | case dst_typ_scope: |
| 523 | size = sizeof (DST_scope (entry)); |
| 524 | break; |
| 525 | case dst_typ_end_scope: |
| 526 | size = 0; |
| 527 | break; |
| 528 | case dst_typ_25: |
| 529 | case dst_typ_26: |
| 530 | size = -1; |
| 531 | break; |
| 532 | case dst_typ_string_tab: |
| 533 | case dst_typ_global_name_tab: |
| 534 | size = sizeof (DST_string_tab (entry)) |
| 535 | + DST_string_tab (entry).length |
| 536 | - dst_dummy_array_size; |
| 537 | break; |
| 538 | case dst_typ_forward: |
| 539 | size = sizeof (DST_forward (entry)); |
| 540 | get_dst_entry ((char *) entry + DST_forward (entry).rec_off, &entry); |
| 541 | break; |
| 542 | case dst_typ_aux_size: |
| 543 | size = sizeof (DST_aux_size (entry)); |
| 544 | break; |
| 545 | case dst_typ_aux_align: |
| 546 | size = sizeof (DST_aux_align (entry)); |
| 547 | break; |
| 548 | case dst_typ_aux_field_size: |
| 549 | size = sizeof (DST_aux_field_size (entry)); |
| 550 | break; |
| 551 | case dst_typ_aux_field_off: |
| 552 | size = sizeof (DST_aux_field_off (entry)); |
| 553 | break; |
| 554 | case dst_typ_aux_field_align: |
| 555 | size = sizeof (DST_aux_field_align (entry)); |
| 556 | break; |
| 557 | case dst_typ_aux_qual: |
| 558 | size = sizeof (DST_aux_qual (entry)); |
| 559 | break; |
| 560 | case dst_typ_aux_var_bound: |
| 561 | size = sizeof (DST_aux_var_bound (entry)); |
| 562 | break; |
| 563 | case dst_typ_extension: |
| 564 | size = DST_extension (entry).rec_size; |
| 565 | break; |
| 566 | case dst_typ_string: |
| 567 | size = sizeof (DST_string (entry)); |
| 568 | break; |
| 569 | case dst_typ_old_entry: |
| 570 | size = 48; /* Obsolete entry type */ |
| 571 | break; |
| 572 | case dst_typ_const: |
| 573 | size = sizeof (DST_const (entry)) |
| 574 | + DST_const (entry).value.length |
| 575 | - sizeof (DST_const (entry).value.val); |
| 576 | break; |
| 577 | case dst_typ_reference: |
| 578 | size = sizeof (DST_reference (entry)); |
| 579 | break; |
| 580 | case dst_typ_old_record: |
| 581 | case dst_typ_old_union: |
| 582 | case dst_typ_record: |
| 583 | case dst_typ_union: |
| 584 | size = sizeof (DST_record (entry)) |
| 585 | + ((int) DST_record (entry).nfields |
| 586 | - dst_dummy_array_size) * sizeof (dst_field_t); |
| 587 | break; |
| 588 | case dst_typ_aux_type_deriv: |
| 589 | size = sizeof (DST_aux_type_deriv (entry)); |
| 590 | break; |
| 591 | case dst_typ_locpool: |
| 592 | size = sizeof (DST_locpool (entry)) |
| 593 | + ((int) DST_locpool (entry).length - |
| 594 | dst_dummy_array_size); |
| 595 | break; |
| 596 | case dst_typ_variable: |
| 597 | size = sizeof (DST_variable (entry)); |
| 598 | break; |
| 599 | case dst_typ_label: |
| 600 | size = sizeof (DST_label (entry)); |
| 601 | break; |
| 602 | case dst_typ_entry: |
| 603 | size = sizeof (DST_entry (entry)); |
| 604 | break; |
| 605 | case dst_typ_aux_lifetime: |
| 606 | size = sizeof (DST_aux_lifetime (entry)); |
| 607 | break; |
| 608 | case dst_typ_aux_ptr_base: |
| 609 | size = sizeof (DST_aux_ptr_base (entry)); |
| 610 | break; |
| 611 | case dst_typ_aux_src_range: |
| 612 | size = sizeof (DST_aux_src_range (entry)); |
| 613 | break; |
| 614 | case dst_typ_aux_reg_val: |
| 615 | size = sizeof (DST_aux_reg_val (entry)); |
| 616 | break; |
| 617 | case dst_typ_aux_unit_names: |
| 618 | size = sizeof (DST_aux_unit_names (entry)) |
| 619 | + ((int) DST_aux_unit_names (entry).number_of_names |
| 620 | - dst_dummy_array_size) * sizeof (dst_rel_offset_t); |
| 621 | break; |
| 622 | case dst_typ_aux_sect_info: |
| 623 | size = sizeof (DST_aux_sect_info (entry)) |
| 624 | + ((int) DST_aux_sect_info (entry).number_of_refs |
| 625 | - dst_dummy_array_size) * sizeof (dst_sect_ref_t); |
| 626 | break; |
| 627 | default: |
| 628 | size = -1; |
| 629 | break; |
| 630 | } |
| 631 | if (size == -1) |
| 632 | { |
| 633 | fprintf_unfiltered (gdb_stderr, "Warning: unexpected DST entry type (%d) found\nLast valid entry was of type: %d\n", |
| 634 | (int) entry->rec_type, |
| 635 | last_type); |
| 636 | fprintf_unfiltered (gdb_stderr, "Last unknown_3 value: %d\n", lu3); |
| 637 | size = 0; |
| 638 | } |
| 639 | else |
| 640 | last_type = entry->rec_type; |
| 641 | if (size & 1) /* Align on a word boundary */ |
| 642 | size++; |
| 643 | size += 2; |
| 644 | *ret_entry = entry; |
| 645 | return size; |
| 646 | } |
| 647 | |
| 648 | static int |
| 649 | next_dst_entry (char **buffer, dst_rec_ptr_t *entry, dst_sec *table) |
| 650 | { |
| 651 | if (*buffer - table->buffer >= table->size) |
| 652 | { |
| 653 | *entry = NULL; |
| 654 | return 0; |
| 655 | } |
| 656 | *buffer += get_dst_entry (*buffer, entry); |
| 657 | return 1; |
| 658 | } |
| 659 | |
| 660 | #define NEXT_BLK(a, b) next_dst_entry(a, b, &blocks_info) |
| 661 | #define NEXT_SYM(a, b) next_dst_entry(a, b, &symbols_info) |
| 662 | #define DST_OFFSET(a, b) ((char *) (a) + (b)) |
| 663 | |
| 664 | static dst_rec_ptr_t section_table = NULL; |
| 665 | |
| 666 | char * |
| 667 | get_sec_ref (dst_sect_ref_t *ref) |
| 668 | { |
| 669 | dst_sec *section = NULL; |
| 670 | long offset; |
| 671 | |
| 672 | if (!section_table || !ref->sect_index) |
| 673 | return NULL; |
| 674 | offset = DST_section_tab (section_table).section_base[ref->sect_index - 1] |
| 675 | + ref->sect_offset; |
| 676 | if (offset >= blocks_info.base && |
| 677 | offset < blocks_info.base + blocks_info.size) |
| 678 | section = &blocks_info; |
| 679 | else if (offset >= symbols_info.base && |
| 680 | offset < symbols_info.base + symbols_info.size) |
| 681 | section = &symbols_info; |
| 682 | else if (offset >= lines_info.base && |
| 683 | offset < lines_info.base + lines_info.size) |
| 684 | section = &lines_info; |
| 685 | if (!section) |
| 686 | return NULL; |
| 687 | return section->buffer + (offset - section->base); |
| 688 | } |
| 689 | |
| 690 | CORE_ADDR |
| 691 | dst_get_addr (int section, long offset) |
| 692 | { |
| 693 | if (!section_table || !section) |
| 694 | return 0; |
| 695 | return DST_section_tab (section_table).section_base[section - 1] + offset; |
| 696 | } |
| 697 | |
| 698 | CORE_ADDR |
| 699 | dst_sym_addr (dst_sect_ref_t *ref) |
| 700 | { |
| 701 | if (!section_table || !ref->sect_index) |
| 702 | return 0; |
| 703 | return DST_section_tab (section_table).section_base[ref->sect_index - 1] |
| 704 | + ref->sect_offset; |
| 705 | } |
| 706 | |
| 707 | static struct type * |
| 708 | create_new_type (struct objfile *objfile) |
| 709 | { |
| 710 | struct type *type; |
| 711 | |
| 712 | type = (struct type *) |
| 713 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct type)); |
| 714 | memset (type, 0, sizeof (struct type)); |
| 715 | return type; |
| 716 | } |
| 717 | |
| 718 | static struct symbol * |
| 719 | create_new_symbol (struct objfile *objfile, char *name) |
| 720 | { |
| 721 | struct symbol *sym = (struct symbol *) |
| 722 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); |
| 723 | memset (sym, 0, sizeof (struct symbol)); |
| 724 | SYMBOL_NAME (sym) = obsavestring (name, strlen (name), |
| 725 | &objfile->symbol_obstack); |
| 726 | SYMBOL_VALUE (sym) = 0; |
| 727 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
| 728 | |
| 729 | SYMBOL_CLASS (sym) = LOC_BLOCK; |
| 730 | return sym; |
| 731 | }; |
| 732 | |
| 733 | static struct type *decode_dst_type (struct objfile *, dst_rec_ptr_t); |
| 734 | |
| 735 | static struct type * |
| 736 | decode_type_desc (struct objfile *objfile, dst_type_t *type_desc, |
| 737 | dst_rec_ptr_t base) |
| 738 | { |
| 739 | struct type *type; |
| 740 | dst_rec_ptr_t entry; |
| 741 | if (type_desc->std_type.user_defined_type) |
| 742 | { |
| 743 | entry = (dst_rec_ptr_t) DST_OFFSET (base, |
| 744 | dst_user_type_offset (*type_desc)); |
| 745 | type = decode_dst_type (objfile, entry); |
| 746 | } |
| 747 | else |
| 748 | { |
| 749 | switch (type_desc->std_type.dtc) |
| 750 | { |
| 751 | case dst_int8_type: |
| 752 | type = builtin_type_signed_char; |
| 753 | break; |
| 754 | case dst_int16_type: |
| 755 | type = builtin_type_short; |
| 756 | break; |
| 757 | case dst_int32_type: |
| 758 | type = builtin_type_long; |
| 759 | break; |
| 760 | case dst_uint8_type: |
| 761 | type = builtin_type_unsigned_char; |
| 762 | break; |
| 763 | case dst_uint16_type: |
| 764 | type = builtin_type_unsigned_short; |
| 765 | break; |
| 766 | case dst_uint32_type: |
| 767 | type = builtin_type_unsigned_long; |
| 768 | break; |
| 769 | case dst_real32_type: |
| 770 | type = builtin_type_float; |
| 771 | break; |
| 772 | case dst_real64_type: |
| 773 | type = builtin_type_double; |
| 774 | break; |
| 775 | case dst_complex_type: |
| 776 | type = builtin_type_complex; |
| 777 | break; |
| 778 | case dst_dcomplex_type: |
| 779 | type = builtin_type_double_complex; |
| 780 | break; |
| 781 | case dst_bool8_type: |
| 782 | type = builtin_type_char; |
| 783 | break; |
| 784 | case dst_bool16_type: |
| 785 | type = builtin_type_short; |
| 786 | break; |
| 787 | case dst_bool32_type: |
| 788 | type = builtin_type_long; |
| 789 | break; |
| 790 | case dst_char_type: |
| 791 | type = builtin_type_char; |
| 792 | break; |
| 793 | /* The next few are more complex. I will take care |
| 794 | * of them properly at a later point. |
| 795 | */ |
| 796 | case dst_string_type: |
| 797 | type = builtin_type_void; |
| 798 | break; |
| 799 | case dst_ptr_type: |
| 800 | type = builtin_type_void; |
| 801 | break; |
| 802 | case dst_set_type: |
| 803 | type = builtin_type_void; |
| 804 | break; |
| 805 | case dst_proc_type: |
| 806 | type = builtin_type_void; |
| 807 | break; |
| 808 | case dst_func_type: |
| 809 | type = builtin_type_void; |
| 810 | break; |
| 811 | /* Back tto some ordinary ones */ |
| 812 | case dst_void_type: |
| 813 | type = builtin_type_void; |
| 814 | break; |
| 815 | case dst_uchar_type: |
| 816 | type = builtin_type_unsigned_char; |
| 817 | break; |
| 818 | default: |
| 819 | type = builtin_type_void; |
| 820 | break; |
| 821 | } |
| 822 | } |
| 823 | return type; |
| 824 | } |
| 825 | |
| 826 | struct structure_list |
| 827 | { |
| 828 | struct structure_list *next; |
| 829 | struct type *type; |
| 830 | }; |
| 831 | |
| 832 | static struct structure_list *struct_list = NULL; |
| 833 | |
| 834 | static struct type * |
| 835 | find_dst_structure (char *name) |
| 836 | { |
| 837 | struct structure_list *element; |
| 838 | |
| 839 | for (element = struct_list; element; element = element->next) |
| 840 | if (!strcmp (name, TYPE_NAME (element->type))) |
| 841 | return element->type; |
| 842 | return NULL; |
| 843 | } |
| 844 | |
| 845 | |
| 846 | static struct type * |
| 847 | decode_dst_structure (struct objfile *objfile, dst_rec_ptr_t entry, int code, |
| 848 | int version) |
| 849 | { |
| 850 | struct type *type, *child_type; |
| 851 | char *struct_name; |
| 852 | char *name, *field_name; |
| 853 | int i; |
| 854 | int fieldoffset, fieldsize; |
| 855 | dst_type_t type_desc; |
| 856 | struct structure_list *element; |
| 857 | |
| 858 | struct_name = DST_OFFSET (entry, DST_record (entry).noffset); |
| 859 | name = concat ((code == TYPE_CODE_UNION) ? "union " : "struct ", |
| 860 | struct_name, NULL); |
| 861 | type = find_dst_structure (name); |
| 862 | if (type) |
| 863 | { |
| 864 | free ((PTR) name); |
| 865 | return type; |
| 866 | } |
| 867 | type = create_new_type (objfile); |
| 868 | TYPE_NAME (type) = obstack_copy0 (&objfile->symbol_obstack, |
| 869 | name, strlen (name)); |
| 870 | free ((PTR) name); |
| 871 | TYPE_CODE (type) = code; |
| 872 | TYPE_LENGTH (type) = DST_record (entry).size; |
| 873 | TYPE_NFIELDS (type) = DST_record (entry).nfields; |
| 874 | TYPE_FIELDS (type) = (struct field *) |
| 875 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * |
| 876 | DST_record (entry).nfields); |
| 877 | fieldoffset = fieldsize = 0; |
| 878 | INIT_CPLUS_SPECIFIC (type); |
| 879 | element = (struct structure_list *) |
| 880 | xmalloc (sizeof (struct structure_list)); |
| 881 | element->type = type; |
| 882 | element->next = struct_list; |
| 883 | struct_list = element; |
| 884 | for (i = 0; i < DST_record (entry).nfields; i++) |
| 885 | { |
| 886 | switch (version) |
| 887 | { |
| 888 | case 2: |
| 889 | field_name = DST_OFFSET (entry, |
| 890 | DST_record (entry).f.ofields[i].noffset); |
| 891 | fieldoffset = DST_record (entry).f.ofields[i].foffset * 8 + |
| 892 | DST_record (entry).f.ofields[i].bit_offset; |
| 893 | fieldsize = DST_record (entry).f.ofields[i].size; |
| 894 | type_desc = DST_record (entry).f.ofields[i].type_desc; |
| 895 | break; |
| 896 | case 1: |
| 897 | field_name = DST_OFFSET (entry, |
| 898 | DST_record (entry).f.fields[i].noffset); |
| 899 | type_desc = DST_record (entry).f.fields[i].type_desc; |
| 900 | switch (DST_record (entry).f.fields[i].f.field_loc.format_tag) |
| 901 | { |
| 902 | case dst_field_byte: |
| 903 | fieldoffset = DST_record (entry).f. |
| 904 | fields[i].f.field_byte.offset * 8; |
| 905 | fieldsize = -1; |
| 906 | break; |
| 907 | case dst_field_bit: |
| 908 | fieldoffset = DST_record (entry).f. |
| 909 | fields[i].f.field_bit.byte_offset * 8 + |
| 910 | DST_record (entry).f. |
| 911 | fields[i].f.field_bit.bit_offset; |
| 912 | fieldsize = DST_record (entry).f. |
| 913 | fields[i].f.field_bit.nbits; |
| 914 | break; |
| 915 | case dst_field_loc: |
| 916 | fieldoffset += fieldsize; |
| 917 | fieldsize = -1; |
| 918 | break; |
| 919 | } |
| 920 | break; |
| 921 | case 0: |
| 922 | field_name = DST_OFFSET (entry, |
| 923 | DST_record (entry).f.sfields[i].noffset); |
| 924 | fieldoffset = DST_record (entry).f.sfields[i].foffset; |
| 925 | type_desc = DST_record (entry).f.sfields[i].type_desc; |
| 926 | if (i < DST_record (entry).nfields - 1) |
| 927 | fieldsize = DST_record (entry).f.sfields[i + 1].foffset; |
| 928 | else |
| 929 | fieldsize = DST_record (entry).size; |
| 930 | fieldsize -= fieldoffset; |
| 931 | fieldoffset *= 8; |
| 932 | fieldsize *= 8; |
| 933 | } |
| 934 | TYPE_FIELDS (type)[i].name = |
| 935 | obstack_copy0 (&objfile->symbol_obstack, |
| 936 | field_name, strlen (field_name)); |
| 937 | TYPE_FIELDS (type)[i].type = decode_type_desc (objfile, |
| 938 | &type_desc, |
| 939 | entry); |
| 940 | if (fieldsize == -1) |
| 941 | fieldsize = TYPE_LENGTH (TYPE_FIELDS (type)[i].type) * |
| 942 | 8; |
| 943 | TYPE_FIELDS (type)[i].bitsize = fieldsize; |
| 944 | TYPE_FIELDS (type)[i].bitpos = fieldoffset; |
| 945 | } |
| 946 | return type; |
| 947 | } |
| 948 | |
| 949 | static struct type * |
| 950 | decode_dst_type (struct objfile *objfile, dst_rec_ptr_t entry) |
| 951 | { |
| 952 | struct type *child_type, *type, *range_type, *index_type; |
| 953 | |
| 954 | switch (entry->rec_type) |
| 955 | { |
| 956 | case dst_typ_var: |
| 957 | return decode_type_desc (objfile, |
| 958 | &DST_var (entry).type_desc, |
| 959 | entry); |
| 960 | break; |
| 961 | case dst_typ_variable: |
| 962 | return decode_type_desc (objfile, |
| 963 | &DST_variable (entry).type_desc, |
| 964 | entry); |
| 965 | break; |
| 966 | case dst_typ_short_rec: |
| 967 | return decode_dst_structure (objfile, entry, TYPE_CODE_STRUCT, 0); |
| 968 | case dst_typ_short_union: |
| 969 | return decode_dst_structure (objfile, entry, TYPE_CODE_UNION, 0); |
| 970 | case dst_typ_union: |
| 971 | return decode_dst_structure (objfile, entry, TYPE_CODE_UNION, 1); |
| 972 | case dst_typ_record: |
| 973 | return decode_dst_structure (objfile, entry, TYPE_CODE_STRUCT, 1); |
| 974 | case dst_typ_old_union: |
| 975 | return decode_dst_structure (objfile, entry, TYPE_CODE_UNION, 2); |
| 976 | case dst_typ_old_record: |
| 977 | return decode_dst_structure (objfile, entry, TYPE_CODE_STRUCT, 2); |
| 978 | case dst_typ_pointer: |
| 979 | return make_pointer_type ( |
| 980 | decode_type_desc (objfile, |
| 981 | &DST_pointer (entry).type_desc, |
| 982 | entry), |
| 983 | NULL); |
| 984 | case dst_typ_array: |
| 985 | child_type = decode_type_desc (objfile, |
| 986 | &DST_pointer (entry).type_desc, |
| 987 | entry); |
| 988 | index_type = lookup_fundamental_type (objfile, |
| 989 | FT_INTEGER); |
| 990 | range_type = create_range_type ((struct type *) NULL, |
| 991 | index_type, DST_array (entry).lo_bound, |
| 992 | DST_array (entry).hi_bound); |
| 993 | return create_array_type ((struct type *) NULL, child_type, |
| 994 | range_type); |
| 995 | case dst_typ_alias: |
| 996 | return decode_type_desc (objfile, |
| 997 | &DST_alias (entry).type_desc, |
| 998 | entry); |
| 999 | default: |
| 1000 | return builtin_type_int; |
| 1001 | } |
| 1002 | } |
| 1003 | |
| 1004 | struct symbol_list |
| 1005 | { |
| 1006 | struct symbol_list *next; |
| 1007 | struct symbol *symbol; |
| 1008 | }; |
| 1009 | |
| 1010 | static struct symbol_list *dst_global_symbols = NULL; |
| 1011 | static int total_globals = 0; |
| 1012 | |
| 1013 | static void |
| 1014 | decode_dst_locstring (char *locstr, struct symbol *sym) |
| 1015 | { |
| 1016 | dst_loc_entry_t *entry, *next_entry; |
| 1017 | CORE_ADDR temp; |
| 1018 | int count = 0; |
| 1019 | |
| 1020 | while (1) |
| 1021 | { |
| 1022 | if (count++ == 100) |
| 1023 | { |
| 1024 | fprintf_unfiltered (gdb_stderr, "Error reading locstring\n"); |
| 1025 | break; |
| 1026 | } |
| 1027 | entry = (dst_loc_entry_t *) locstr; |
| 1028 | next_entry = (dst_loc_entry_t *) (locstr + 1); |
| 1029 | switch (entry->header.code) |
| 1030 | { |
| 1031 | case dst_lsc_end: /* End of string */ |
| 1032 | return; |
| 1033 | case dst_lsc_indirect: /* Indirect through previous. Arg == 6 */ |
| 1034 | /* Or register ax x == arg */ |
| 1035 | if (entry->header.arg < 6) |
| 1036 | { |
| 1037 | SYMBOL_CLASS (sym) = LOC_REGISTER; |
| 1038 | SYMBOL_VALUE (sym) = entry->header.arg + 8; |
| 1039 | } |
| 1040 | /* We predict indirects */ |
| 1041 | locstr++; |
| 1042 | break; |
| 1043 | case dst_lsc_dreg: |
| 1044 | SYMBOL_CLASS (sym) = LOC_REGISTER; |
| 1045 | SYMBOL_VALUE (sym) = entry->header.arg; |
| 1046 | locstr++; |
| 1047 | break; |
| 1048 | case dst_lsc_section: /* Section (arg+1) */ |
| 1049 | SYMBOL_VALUE (sym) = dst_get_addr (entry->header.arg + 1, 0); |
| 1050 | locstr++; |
| 1051 | break; |
| 1052 | case dst_lsc_sec_byte: /* Section (next_byte+1) */ |
| 1053 | SYMBOL_VALUE (sym) = dst_get_addr (locstr[1] + 1, 0); |
| 1054 | locstr += 2; |
| 1055 | break; |
| 1056 | case dst_lsc_add: /* Add (arg+1)*2 */ |
| 1057 | case dst_lsc_sub: /* Subtract (arg+1)*2 */ |
| 1058 | temp = (entry->header.arg + 1) * 2; |
| 1059 | locstr++; |
| 1060 | if (*locstr == dst_multiply_256) |
| 1061 | { |
| 1062 | temp <<= 8; |
| 1063 | locstr++; |
| 1064 | } |
| 1065 | switch (entry->header.code) |
| 1066 | { |
| 1067 | case dst_lsc_add: |
| 1068 | if (SYMBOL_CLASS (sym) == LOC_LOCAL) |
| 1069 | SYMBOL_CLASS (sym) = LOC_ARG; |
| 1070 | SYMBOL_VALUE (sym) += temp; |
| 1071 | break; |
| 1072 | case dst_lsc_sub: |
| 1073 | SYMBOL_VALUE (sym) -= temp; |
| 1074 | break; |
| 1075 | } |
| 1076 | break; |
| 1077 | case dst_lsc_add_byte: |
| 1078 | case dst_lsc_sub_byte: |
| 1079 | switch (entry->header.arg & 0x03) |
| 1080 | { |
| 1081 | case 1: |
| 1082 | temp = (unsigned char) locstr[1]; |
| 1083 | locstr += 2; |
| 1084 | break; |
| 1085 | case 2: |
| 1086 | temp = *(unsigned short *) (locstr + 1); |
| 1087 | locstr += 3; |
| 1088 | break; |
| 1089 | case 3: |
| 1090 | temp = *(unsigned long *) (locstr + 1); |
| 1091 | locstr += 5; |
| 1092 | break; |
| 1093 | } |
| 1094 | if (*locstr == dst_multiply_256) |
| 1095 | { |
| 1096 | temp <<= 8; |
| 1097 | locstr++; |
| 1098 | } |
| 1099 | switch (entry->header.code) |
| 1100 | { |
| 1101 | case dst_lsc_add_byte: |
| 1102 | if (SYMBOL_CLASS (sym) == LOC_LOCAL) |
| 1103 | SYMBOL_CLASS (sym) = LOC_ARG; |
| 1104 | SYMBOL_VALUE (sym) += temp; |
| 1105 | break; |
| 1106 | case dst_lsc_sub_byte: |
| 1107 | SYMBOL_VALUE (sym) -= temp; |
| 1108 | break; |
| 1109 | } |
| 1110 | break; |
| 1111 | case dst_lsc_sbreg: /* Stack base register (frame pointer). Arg==0 */ |
| 1112 | if (next_entry->header.code != dst_lsc_indirect) |
| 1113 | { |
| 1114 | SYMBOL_VALUE (sym) = 0; |
| 1115 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 1116 | return; |
| 1117 | } |
| 1118 | SYMBOL_VALUE (sym) = 0; |
| 1119 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
| 1120 | locstr++; |
| 1121 | break; |
| 1122 | default: |
| 1123 | SYMBOL_VALUE (sym) = 0; |
| 1124 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 1125 | return; |
| 1126 | } |
| 1127 | } |
| 1128 | } |
| 1129 | |
| 1130 | static struct symbol_list * |
| 1131 | process_dst_symbols (struct objfile *objfile, dst_rec_ptr_t entry, char *name, |
| 1132 | int *nsyms_ret) |
| 1133 | { |
| 1134 | struct symbol_list *list = NULL, *element; |
| 1135 | struct symbol *sym; |
| 1136 | char *symname; |
| 1137 | int nsyms = 0; |
| 1138 | char *location; |
| 1139 | long line; |
| 1140 | dst_type_t symtype; |
| 1141 | struct type *type; |
| 1142 | dst_var_attr_t attr; |
| 1143 | dst_var_loc_t loc_type; |
| 1144 | unsigned loc_index; |
| 1145 | long loc_value; |
| 1146 | |
| 1147 | if (!entry) |
| 1148 | { |
| 1149 | *nsyms_ret = 0; |
| 1150 | return NULL; |
| 1151 | } |
| 1152 | location = (char *) entry; |
| 1153 | while (NEXT_SYM (&location, &entry) && |
| 1154 | entry->rec_type != dst_typ_end_scope) |
| 1155 | { |
| 1156 | if (entry->rec_type == dst_typ_var) |
| 1157 | { |
| 1158 | if (DST_var (entry).short_locs) |
| 1159 | { |
| 1160 | loc_type = DST_var (entry).locs.shorts[0].loc_type; |
| 1161 | loc_index = DST_var (entry).locs.shorts[0].loc_index; |
| 1162 | loc_value = DST_var (entry).locs.shorts[0].location; |
| 1163 | } |
| 1164 | else |
| 1165 | { |
| 1166 | loc_type = DST_var (entry).locs.longs[0].loc_type; |
| 1167 | loc_index = DST_var (entry).locs.longs[0].loc_index; |
| 1168 | loc_value = DST_var (entry).locs.longs[0].location; |
| 1169 | } |
| 1170 | if (loc_type == dst_var_loc_external) |
| 1171 | continue; |
| 1172 | symname = DST_OFFSET (entry, DST_var (entry).noffset); |
| 1173 | line = DST_var (entry).src_loc.line_number; |
| 1174 | symtype = DST_var (entry).type_desc; |
| 1175 | attr = DST_var (entry).attributes; |
| 1176 | } |
| 1177 | else if (entry->rec_type == dst_typ_variable) |
| 1178 | { |
| 1179 | symname = DST_OFFSET (entry, |
| 1180 | DST_variable (entry).noffset); |
| 1181 | line = DST_variable (entry).src_loc.line_number; |
| 1182 | symtype = DST_variable (entry).type_desc; |
| 1183 | attr = DST_variable (entry).attributes; |
| 1184 | } |
| 1185 | else |
| 1186 | { |
| 1187 | continue; |
| 1188 | } |
| 1189 | if (symname && name && !strcmp (symname, name)) |
| 1190 | /* It's the function return value */ |
| 1191 | continue; |
| 1192 | sym = create_new_symbol (objfile, symname); |
| 1193 | |
| 1194 | if ((attr & (1 << dst_var_attr_global)) || |
| 1195 | (attr & (1 << dst_var_attr_static))) |
| 1196 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 1197 | else |
| 1198 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
| 1199 | SYMBOL_LINE (sym) = line; |
| 1200 | SYMBOL_TYPE (sym) = decode_type_desc (objfile, &symtype, |
| 1201 | entry); |
| 1202 | SYMBOL_VALUE (sym) = 0; |
| 1203 | switch (entry->rec_type) |
| 1204 | { |
| 1205 | case dst_typ_var: |
| 1206 | switch (loc_type) |
| 1207 | { |
| 1208 | case dst_var_loc_abs: |
| 1209 | SYMBOL_VALUE_ADDRESS (sym) = loc_value; |
| 1210 | break; |
| 1211 | case dst_var_loc_sect_off: |
| 1212 | case dst_var_loc_ind_sect_off: /* What is this? */ |
| 1213 | SYMBOL_VALUE_ADDRESS (sym) = dst_get_addr ( |
| 1214 | loc_index, |
| 1215 | loc_value); |
| 1216 | break; |
| 1217 | case dst_var_loc_ind_reg_rel: /* What is this? */ |
| 1218 | case dst_var_loc_reg_rel: |
| 1219 | /* If it isn't fp relative, specify the |
| 1220 | * register it's relative to. |
| 1221 | */ |
| 1222 | if (loc_index) |
| 1223 | { |
| 1224 | sym->aux_value.basereg = loc_index; |
| 1225 | } |
| 1226 | SYMBOL_VALUE (sym) = loc_value; |
| 1227 | if (loc_value > 0 && |
| 1228 | SYMBOL_CLASS (sym) == LOC_BASEREG) |
| 1229 | SYMBOL_CLASS (sym) = LOC_BASEREG_ARG; |
| 1230 | break; |
| 1231 | case dst_var_loc_reg: |
| 1232 | SYMBOL_VALUE (sym) = loc_index; |
| 1233 | SYMBOL_CLASS (sym) = LOC_REGISTER; |
| 1234 | break; |
| 1235 | } |
| 1236 | break; |
| 1237 | case dst_typ_variable: |
| 1238 | /* External variable..... don't try to interpret |
| 1239 | * its nonexistant locstring. |
| 1240 | */ |
| 1241 | if (DST_variable (entry).loffset == -1) |
| 1242 | continue; |
| 1243 | decode_dst_locstring (DST_OFFSET (entry, |
| 1244 | DST_variable (entry).loffset), |
| 1245 | sym); |
| 1246 | } |
| 1247 | element = (struct symbol_list *) |
| 1248 | xmalloc (sizeof (struct symbol_list)); |
| 1249 | |
| 1250 | if (attr & (1 << dst_var_attr_global)) |
| 1251 | { |
| 1252 | element->next = dst_global_symbols; |
| 1253 | dst_global_symbols = element; |
| 1254 | total_globals++; |
| 1255 | } |
| 1256 | else |
| 1257 | { |
| 1258 | element->next = list; |
| 1259 | list = element; |
| 1260 | nsyms++; |
| 1261 | } |
| 1262 | element->symbol = sym; |
| 1263 | } |
| 1264 | *nsyms_ret = nsyms; |
| 1265 | return list; |
| 1266 | } |
| 1267 | |
| 1268 | |
| 1269 | static struct symbol * |
| 1270 | process_dst_function (struct objfile *objfile, dst_rec_ptr_t entry, char *name, |
| 1271 | CORE_ADDR address) |
| 1272 | { |
| 1273 | struct symbol *sym; |
| 1274 | struct type *type, *ftype; |
| 1275 | dst_rec_ptr_t sym_entry, typ_entry; |
| 1276 | char *location; |
| 1277 | struct symbol_list *element; |
| 1278 | |
| 1279 | type = builtin_type_int; |
| 1280 | sym = create_new_symbol (objfile, name); |
| 1281 | SYMBOL_CLASS (sym) = LOC_BLOCK; |
| 1282 | |
| 1283 | if (entry) |
| 1284 | { |
| 1285 | location = (char *) entry; |
| 1286 | do |
| 1287 | { |
| 1288 | NEXT_SYM (&location, &sym_entry); |
| 1289 | } |
| 1290 | while (sym_entry && sym_entry->rec_type != dst_typ_signature); |
| 1291 | |
| 1292 | if (sym_entry) |
| 1293 | { |
| 1294 | SYMBOL_LINE (sym) = |
| 1295 | DST_signature (sym_entry).src_loc.line_number; |
| 1296 | if (DST_signature (sym_entry).result) |
| 1297 | { |
| 1298 | typ_entry = (dst_rec_ptr_t) |
| 1299 | DST_OFFSET (sym_entry, |
| 1300 | DST_signature (sym_entry).result); |
| 1301 | type = decode_dst_type (objfile, typ_entry); |
| 1302 | } |
| 1303 | } |
| 1304 | } |
| 1305 | |
| 1306 | if (!type->function_type) |
| 1307 | { |
| 1308 | ftype = create_new_type (objfile); |
| 1309 | type->function_type = ftype; |
| 1310 | ftype->target_type = type; |
| 1311 | ftype->code = TYPE_CODE_FUNC; |
| 1312 | } |
| 1313 | SYMBOL_TYPE (sym) = type->function_type; |
| 1314 | |
| 1315 | /* Now add ourselves to the global symbols list */ |
| 1316 | element = (struct symbol_list *) |
| 1317 | xmalloc (sizeof (struct symbol_list)); |
| 1318 | |
| 1319 | element->next = dst_global_symbols; |
| 1320 | dst_global_symbols = element; |
| 1321 | total_globals++; |
| 1322 | element->symbol = sym; |
| 1323 | |
| 1324 | return sym; |
| 1325 | } |
| 1326 | |
| 1327 | static struct block * |
| 1328 | process_dst_block (struct objfile *objfile, dst_rec_ptr_t entry) |
| 1329 | { |
| 1330 | struct block *block; |
| 1331 | struct symbol *function = NULL; |
| 1332 | CORE_ADDR address; |
| 1333 | long size; |
| 1334 | char *name; |
| 1335 | dst_rec_ptr_t child_entry, symbol_entry; |
| 1336 | struct block *child_block; |
| 1337 | int total_symbols = 0; |
| 1338 | char fake_name[20]; |
| 1339 | static long fake_seq = 0; |
| 1340 | struct symbol_list *symlist, *nextsym; |
| 1341 | int symnum; |
| 1342 | |
| 1343 | if (DST_block (entry).noffset) |
| 1344 | name = DST_OFFSET (entry, DST_block (entry).noffset); |
| 1345 | else |
| 1346 | name = NULL; |
| 1347 | if (DST_block (entry).n_of_code_ranges) |
| 1348 | { |
| 1349 | address = dst_sym_addr ( |
| 1350 | &DST_block (entry).code_ranges[0].code_start); |
| 1351 | size = DST_block (entry).code_ranges[0].code_size; |
| 1352 | } |
| 1353 | else |
| 1354 | { |
| 1355 | address = -1; |
| 1356 | size = 0; |
| 1357 | } |
| 1358 | symbol_entry = (dst_rec_ptr_t) get_sec_ref (&DST_block (entry).symbols_start); |
| 1359 | switch (DST_block (entry).block_type) |
| 1360 | { |
| 1361 | /* These are all really functions. Even the "program" type. |
| 1362 | * This is because the Apollo OS was written in Pascal, and |
| 1363 | * in Pascal, the main procedure is described as the Program. |
| 1364 | * Cute, huh? |
| 1365 | */ |
| 1366 | case dst_block_procedure: |
| 1367 | case dst_block_function: |
| 1368 | case dst_block_subroutine: |
| 1369 | case dst_block_program: |
| 1370 | prim_record_minimal_symbol (name, address, mst_text, objfile); |
| 1371 | function = process_dst_function ( |
| 1372 | objfile, |
| 1373 | symbol_entry, |
| 1374 | name, |
| 1375 | address); |
| 1376 | enter_all_lines (get_sec_ref (&DST_block (entry).code_ranges[0].lines_start), address); |
| 1377 | break; |
| 1378 | case dst_block_block_data: |
| 1379 | break; |
| 1380 | |
| 1381 | default: |
| 1382 | /* GDB has to call it something, and the module name |
| 1383 | * won't cut it |
| 1384 | */ |
| 1385 | sprintf (fake_name, "block_%08lx", fake_seq++); |
| 1386 | function = process_dst_function ( |
| 1387 | objfile, NULL, fake_name, address); |
| 1388 | break; |
| 1389 | } |
| 1390 | symlist = process_dst_symbols (objfile, symbol_entry, |
| 1391 | name, &total_symbols); |
| 1392 | block = (struct block *) |
| 1393 | obstack_alloc (&objfile->symbol_obstack, |
| 1394 | sizeof (struct block) + |
| 1395 | (total_symbols - 1) * sizeof (struct symbol *)); |
| 1396 | |
| 1397 | symnum = 0; |
| 1398 | while (symlist) |
| 1399 | { |
| 1400 | nextsym = symlist->next; |
| 1401 | |
| 1402 | block->sym[symnum] = symlist->symbol; |
| 1403 | |
| 1404 | free ((PTR) symlist); |
| 1405 | symlist = nextsym; |
| 1406 | symnum++; |
| 1407 | } |
| 1408 | BLOCK_NSYMS (block) = total_symbols; |
| 1409 | BLOCK_START (block) = address; |
| 1410 | BLOCK_END (block) = address + size; |
| 1411 | BLOCK_SUPERBLOCK (block) = 0; |
| 1412 | if (function) |
| 1413 | { |
| 1414 | SYMBOL_BLOCK_VALUE (function) = block; |
| 1415 | BLOCK_FUNCTION (block) = function; |
| 1416 | } |
| 1417 | else |
| 1418 | BLOCK_FUNCTION (block) = 0; |
| 1419 | |
| 1420 | if (DST_block (entry).child_block_off) |
| 1421 | { |
| 1422 | child_entry = (dst_rec_ptr_t) DST_OFFSET (entry, |
| 1423 | DST_block (entry).child_block_off); |
| 1424 | while (child_entry) |
| 1425 | { |
| 1426 | child_block = process_dst_block (objfile, child_entry); |
| 1427 | if (child_block) |
| 1428 | { |
| 1429 | if (BLOCK_START (child_block) < |
| 1430 | BLOCK_START (block) || |
| 1431 | BLOCK_START (block) == -1) |
| 1432 | BLOCK_START (block) = |
| 1433 | BLOCK_START (child_block); |
| 1434 | if (BLOCK_END (child_block) > |
| 1435 | BLOCK_END (block) || |
| 1436 | BLOCK_END (block) == -1) |
| 1437 | BLOCK_END (block) = |
| 1438 | BLOCK_END (child_block); |
| 1439 | BLOCK_SUPERBLOCK (child_block) = block; |
| 1440 | } |
| 1441 | if (DST_block (child_entry).sibling_block_off) |
| 1442 | child_entry = (dst_rec_ptr_t) DST_OFFSET ( |
| 1443 | child_entry, |
| 1444 | DST_block (child_entry).sibling_block_off); |
| 1445 | else |
| 1446 | child_entry = NULL; |
| 1447 | } |
| 1448 | } |
| 1449 | record_pending_block (objfile, block, NULL); |
| 1450 | return block; |
| 1451 | } |
| 1452 | |
| 1453 | |
| 1454 | static void |
| 1455 | read_dst_symtab (struct objfile *objfile) |
| 1456 | { |
| 1457 | char *buffer; |
| 1458 | dst_rec_ptr_t entry, file_table, root_block; |
| 1459 | char *source_file; |
| 1460 | struct block *block, *global_block; |
| 1461 | int symnum; |
| 1462 | struct symbol_list *nextsym; |
| 1463 | int module_num = 0; |
| 1464 | struct structure_list *element; |
| 1465 | |
| 1466 | current_objfile = objfile; |
| 1467 | buffer = blocks_info.buffer; |
| 1468 | while (NEXT_BLK (&buffer, &entry)) |
| 1469 | { |
| 1470 | if (entry->rec_type == dst_typ_comp_unit) |
| 1471 | { |
| 1472 | file_table = (dst_rec_ptr_t) DST_OFFSET (entry, |
| 1473 | DST_comp_unit (entry).file_table); |
| 1474 | section_table = (dst_rec_ptr_t) DST_OFFSET (entry, |
| 1475 | DST_comp_unit (entry).section_table); |
| 1476 | root_block = (dst_rec_ptr_t) DST_OFFSET (entry, |
| 1477 | DST_comp_unit (entry).root_block_offset); |
| 1478 | source_file = DST_OFFSET (file_table, |
| 1479 | DST_file_tab (file_table).files[0].noffset); |
| 1480 | /* Point buffer to the start of the next comp_unit */ |
| 1481 | buffer = DST_OFFSET (entry, |
| 1482 | DST_comp_unit (entry).data_size); |
| 1483 | dst_start_symtab (); |
| 1484 | |
| 1485 | block = process_dst_block (objfile, root_block); |
| 1486 | |
| 1487 | global_block = (struct block *) |
| 1488 | obstack_alloc (&objfile->symbol_obstack, |
| 1489 | sizeof (struct block) + |
| 1490 | (total_globals - 1) * |
| 1491 | sizeof (struct symbol *)); |
| 1492 | BLOCK_NSYMS (global_block) = total_globals; |
| 1493 | for (symnum = 0; symnum < total_globals; symnum++) |
| 1494 | { |
| 1495 | nextsym = dst_global_symbols->next; |
| 1496 | |
| 1497 | global_block->sym[symnum] = |
| 1498 | dst_global_symbols->symbol; |
| 1499 | |
| 1500 | free ((PTR) dst_global_symbols); |
| 1501 | dst_global_symbols = nextsym; |
| 1502 | } |
| 1503 | dst_global_symbols = NULL; |
| 1504 | total_globals = 0; |
| 1505 | BLOCK_FUNCTION (global_block) = 0; |
| 1506 | BLOCK_START (global_block) = BLOCK_START (block); |
| 1507 | BLOCK_END (global_block) = BLOCK_END (block); |
| 1508 | BLOCK_SUPERBLOCK (global_block) = 0; |
| 1509 | BLOCK_SUPERBLOCK (block) = global_block; |
| 1510 | record_pending_block (objfile, global_block, NULL); |
| 1511 | |
| 1512 | complete_symtab (source_file, |
| 1513 | BLOCK_START (block), |
| 1514 | BLOCK_END (block) - BLOCK_START (block)); |
| 1515 | module_num++; |
| 1516 | dst_end_symtab (objfile); |
| 1517 | } |
| 1518 | } |
| 1519 | if (module_num) |
| 1520 | prim_record_minimal_symbol ("<end_of_program>", |
| 1521 | BLOCK_END (block), mst_text, objfile); |
| 1522 | /* One more faked symbol to make sure nothing can ever run off the |
| 1523 | * end of the symbol table. This one represents the end of the |
| 1524 | * text space. It used to be (CORE_ADDR) -1 (effectively the highest |
| 1525 | * int possible), but some parts of gdb treated it as a signed |
| 1526 | * number and failed comparisons. We could equally use 7fffffff, |
| 1527 | * but no functions are ever mapped to an address higher than |
| 1528 | * 40000000 |
| 1529 | */ |
| 1530 | prim_record_minimal_symbol ("<end_of_text>", |
| 1531 | (CORE_ADDR) 0x40000000, |
| 1532 | mst_text, objfile); |
| 1533 | while (struct_list) |
| 1534 | { |
| 1535 | element = struct_list; |
| 1536 | struct_list = element->next; |
| 1537 | free ((PTR) element); |
| 1538 | } |
| 1539 | } |
| 1540 | \f |
| 1541 | |
| 1542 | /* Support for line number handling */ |
| 1543 | static char *linetab = NULL; |
| 1544 | static long linetab_offset; |
| 1545 | static unsigned long linetab_size; |
| 1546 | |
| 1547 | /* Read in all the line numbers for fast lookups later. Leave them in |
| 1548 | external (unswapped) format in memory; we'll swap them as we enter |
| 1549 | them into GDB's data structures. */ |
| 1550 | static int |
| 1551 | init_one_section (int chan, dst_sec *secinfo) |
| 1552 | { |
| 1553 | if (secinfo->size == 0 |
| 1554 | || lseek (chan, secinfo->position, 0) == -1 |
| 1555 | || (secinfo->buffer = xmalloc (secinfo->size)) == NULL |
| 1556 | || myread (chan, secinfo->buffer, secinfo->size) == -1) |
| 1557 | return 0; |
| 1558 | else |
| 1559 | return 1; |
| 1560 | } |
| 1561 | |
| 1562 | static int |
| 1563 | init_dst_sections (int chan) |
| 1564 | { |
| 1565 | |
| 1566 | if (!init_one_section (chan, &blocks_info) || |
| 1567 | !init_one_section (chan, &lines_info) || |
| 1568 | !init_one_section (chan, &symbols_info)) |
| 1569 | return -1; |
| 1570 | else |
| 1571 | return 0; |
| 1572 | } |
| 1573 | |
| 1574 | /* Fake up support for relocating symbol addresses. FIXME. */ |
| 1575 | |
| 1576 | struct section_offsets dst_symfile_faker = |
| 1577 | {0}; |
| 1578 | |
| 1579 | void |
| 1580 | dst_symfile_offsets (struct objfile *objfile, struct section_addr_info *addrs) |
| 1581 | { |
| 1582 | objfile->num_sections = 1; |
| 1583 | objfile->section_offsets = &dst_symfile_faker; |
| 1584 | } |
| 1585 | |
| 1586 | /* Register our ability to parse symbols for DST BFD files */ |
| 1587 | |
| 1588 | static struct sym_fns dst_sym_fns = |
| 1589 | { |
| 1590 | /* FIXME: Can this be integrated with coffread.c? If not, should it be |
| 1591 | a separate flavour like ecoff? */ |
| 1592 | (enum bfd_flavour) -2, |
| 1593 | |
| 1594 | dst_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| 1595 | dst_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| 1596 | dst_symfile_read, /* sym_read: read a symbol file into symtab */ |
| 1597 | dst_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| 1598 | dst_symfile_offsets, /* sym_offsets: xlate external to internal form */ |
| 1599 | NULL /* next: pointer to next struct sym_fns */ |
| 1600 | }; |
| 1601 | |
| 1602 | void |
| 1603 | _initialize_dstread (void) |
| 1604 | { |
| 1605 | add_symtab_fns (&dst_sym_fns); |
| 1606 | } |