| 1 | /* Read AIX xcoff symbol tables and convert to internal format, for GDB. |
| 2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993 |
| 3 | Free Software Foundation, Inc. |
| 4 | Derived from coffread.c, dbxread.c, and a lot of hacking. |
| 5 | Contributed by IBM Corporation. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 22 | |
| 23 | /* Native only: Need struct tbtable in <sys/debug.h> from host, and |
| 24 | need xcoff_add_toc_to_loadinfo in rs6000-tdep.c from target. |
| 25 | need xcoff_init_loadinfo ditto. |
| 26 | However, if you grab <sys/debug.h> and make it available on your |
| 27 | host, and define FAKING_RS6000, then this code will compile. */ |
| 28 | |
| 29 | #include "defs.h" |
| 30 | #include "bfd.h" |
| 31 | |
| 32 | #include <sys/types.h> |
| 33 | #include <fcntl.h> |
| 34 | #include <ctype.h> |
| 35 | |
| 36 | #include "obstack.h" |
| 37 | #include <sys/param.h> |
| 38 | #ifndef NO_SYS_FILE |
| 39 | #include <sys/file.h> |
| 40 | #endif |
| 41 | #include <sys/stat.h> |
| 42 | #include <sys/debug.h> |
| 43 | |
| 44 | #include "coff/internal.h" /* FIXME, internal data from BFD */ |
| 45 | #include "libcoff.h" /* FIXME, internal data from BFD */ |
| 46 | #include "coff/rs6000.h" /* FIXME, raw file-format guts of xcoff */ |
| 47 | |
| 48 | #include "symtab.h" |
| 49 | #include "gdbtypes.h" |
| 50 | #include "symfile.h" |
| 51 | #include "objfiles.h" |
| 52 | #include "buildsym.h" |
| 53 | #include "stabsread.h" |
| 54 | #include "complaints.h" |
| 55 | |
| 56 | /* For interface with stabsread.c. */ |
| 57 | #include "aout/stab_gnu.h" |
| 58 | |
| 59 | /* Simplified internal version of coff symbol table information */ |
| 60 | |
| 61 | struct coff_symbol { |
| 62 | char *c_name; |
| 63 | int c_symnum; /* symbol number of this entry */ |
| 64 | int c_naux; /* 0 if syment only, 1 if syment + auxent */ |
| 65 | long c_value; |
| 66 | unsigned char c_sclass; |
| 67 | int c_secnum; |
| 68 | unsigned int c_type; |
| 69 | }; |
| 70 | |
| 71 | /* The COFF line table, in raw form. */ |
| 72 | static char *linetab = NULL; /* Its actual contents */ |
| 73 | static long linetab_offset; /* Its offset in the file */ |
| 74 | static unsigned long linetab_size; /* Its size */ |
| 75 | |
| 76 | /* last function's saved coff symbol `cs' */ |
| 77 | |
| 78 | static struct coff_symbol fcn_cs_saved; |
| 79 | |
| 80 | static bfd *symfile_bfd; |
| 81 | |
| 82 | /* Core address of start and end of text of current source file. |
| 83 | This is calculated from the first function seen after a C_FILE |
| 84 | symbol. */ |
| 85 | |
| 86 | |
| 87 | static CORE_ADDR cur_src_end_addr; |
| 88 | |
| 89 | /* Core address of the end of the first object file. */ |
| 90 | |
| 91 | static CORE_ADDR first_object_file_end; |
| 92 | |
| 93 | /* pointer to the string table */ |
| 94 | static char *strtbl; |
| 95 | |
| 96 | /* length of the string table */ |
| 97 | static int strtbl_len; |
| 98 | |
| 99 | /* pointer to debug section */ |
| 100 | static char *debugsec; |
| 101 | |
| 102 | /* pointer to the a.out symbol table */ |
| 103 | static char *symtbl; |
| 104 | |
| 105 | /* Number of symbols in symtbl. */ |
| 106 | static int symtbl_num_syms; |
| 107 | |
| 108 | /* initial symbol-table-debug-string vector length */ |
| 109 | |
| 110 | #define INITIAL_STABVECTOR_LENGTH 40 |
| 111 | |
| 112 | /* Nonzero if within a function (so symbols should be local, |
| 113 | if nothing says specifically). */ |
| 114 | |
| 115 | int within_function; |
| 116 | |
| 117 | /* Local variables that hold the shift and mask values for the |
| 118 | COFF file that we are currently reading. These come back to us |
| 119 | from BFD, and are referenced by their macro names, as well as |
| 120 | internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF |
| 121 | macros from ../internalcoff.h . */ |
| 122 | |
| 123 | static unsigned local_n_btshft; |
| 124 | static unsigned local_n_tmask; |
| 125 | |
| 126 | #undef N_BTSHFT |
| 127 | #define N_BTSHFT local_n_btshft |
| 128 | #undef N_TMASK |
| 129 | #define N_TMASK local_n_tmask |
| 130 | |
| 131 | /* Local variables that hold the sizes in the file of various COFF structures. |
| 132 | (We only need to know this to read them from the file -- BFD will then |
| 133 | translate the data in them, into `internal_xxx' structs in the right |
| 134 | byte order, alignment, etc.) */ |
| 135 | |
| 136 | static unsigned local_symesz; |
| 137 | |
| 138 | struct coff_symfile_info { |
| 139 | file_ptr min_lineno_offset; /* Where in file lowest line#s are */ |
| 140 | file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ |
| 141 | }; |
| 142 | |
| 143 | static struct complaint rsym_complaint = |
| 144 | {"Non-stab C_RSYM `%s' needs special handling", 0, 0}; |
| 145 | |
| 146 | static struct complaint storclass_complaint = |
| 147 | {"Unexpected storage class: %d", 0, 0}; |
| 148 | |
| 149 | static struct complaint bf_notfound_complaint = |
| 150 | {"line numbers off, `.bf' symbol not found", 0, 0}; |
| 151 | |
| 152 | static void |
| 153 | enter_line_range PARAMS ((struct subfile *, unsigned, unsigned, |
| 154 | CORE_ADDR, CORE_ADDR, unsigned *)); |
| 155 | |
| 156 | static void |
| 157 | free_debugsection PARAMS ((void)); |
| 158 | |
| 159 | static int |
| 160 | init_debugsection PARAMS ((bfd *)); |
| 161 | |
| 162 | static int |
| 163 | init_stringtab PARAMS ((bfd *, file_ptr, struct objfile *)); |
| 164 | |
| 165 | static void |
| 166 | xcoff_symfile_init PARAMS ((struct objfile *)); |
| 167 | |
| 168 | static void |
| 169 | xcoff_new_init PARAMS ((struct objfile *)); |
| 170 | |
| 171 | static void |
| 172 | xcoff_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int)); |
| 173 | |
| 174 | static void |
| 175 | xcoff_symfile_finish PARAMS ((struct objfile *)); |
| 176 | |
| 177 | static struct section_offsets * |
| 178 | xcoff_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR)); |
| 179 | |
| 180 | static int |
| 181 | init_lineno PARAMS ((bfd *, file_ptr, int)); |
| 182 | |
| 183 | static void |
| 184 | free_linetab PARAMS ((void)); |
| 185 | |
| 186 | static void |
| 187 | find_linenos PARAMS ((bfd *, sec_ptr, PTR)); |
| 188 | |
| 189 | static void |
| 190 | read_symbol PARAMS ((struct internal_syment *, int)); |
| 191 | |
| 192 | static int |
| 193 | read_symbol_lineno PARAMS ((int)); |
| 194 | |
| 195 | static int |
| 196 | read_symbol_nvalue PARAMS ((int)); |
| 197 | |
| 198 | static struct symbol * |
| 199 | process_xcoff_symbol PARAMS ((struct coff_symbol *, struct objfile *)); |
| 200 | |
| 201 | static void |
| 202 | read_xcoff_symtab PARAMS ((struct objfile *, int)); |
| 203 | |
| 204 | static void |
| 205 | add_stab_to_list PARAMS ((char *, struct pending_stabs **)); |
| 206 | |
| 207 | /* add a given stab string into given stab vector. */ |
| 208 | |
| 209 | static void |
| 210 | add_stab_to_list (stabname, stabvector) |
| 211 | char *stabname; |
| 212 | struct pending_stabs **stabvector; |
| 213 | { |
| 214 | if ( *stabvector == NULL) { |
| 215 | *stabvector = (struct pending_stabs *) |
| 216 | xmalloc (sizeof (struct pending_stabs) + |
| 217 | INITIAL_STABVECTOR_LENGTH * sizeof (char*)); |
| 218 | (*stabvector)->count = 0; |
| 219 | (*stabvector)->length = INITIAL_STABVECTOR_LENGTH; |
| 220 | } |
| 221 | else if ((*stabvector)->count >= (*stabvector)->length) { |
| 222 | (*stabvector)->length += INITIAL_STABVECTOR_LENGTH; |
| 223 | *stabvector = (struct pending_stabs *) |
| 224 | xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) + |
| 225 | (*stabvector)->length * sizeof (char*)); |
| 226 | } |
| 227 | (*stabvector)->stab [(*stabvector)->count++] = stabname; |
| 228 | } |
| 229 | \f |
| 230 | /* Linenos are processed on a file-by-file basis. |
| 231 | |
| 232 | Two reasons: |
| 233 | |
| 234 | 1) xlc (IBM's native c compiler) postpones static function code |
| 235 | emission to the end of a compilation unit. This way it can |
| 236 | determine if those functions (statics) are needed or not, and |
| 237 | can do some garbage collection (I think). This makes line |
| 238 | numbers and corresponding addresses unordered, and we end up |
| 239 | with a line table like: |
| 240 | |
| 241 | |
| 242 | lineno addr |
| 243 | foo() 10 0x100 |
| 244 | 20 0x200 |
| 245 | 30 0x300 |
| 246 | |
| 247 | foo3() 70 0x400 |
| 248 | 80 0x500 |
| 249 | 90 0x600 |
| 250 | |
| 251 | static foo2() |
| 252 | 40 0x700 |
| 253 | 50 0x800 |
| 254 | 60 0x900 |
| 255 | |
| 256 | and that breaks gdb's binary search on line numbers, if the |
| 257 | above table is not sorted on line numbers. And that sort |
| 258 | should be on function based, since gcc can emit line numbers |
| 259 | like: |
| 260 | |
| 261 | 10 0x100 - for the init/test part of a for stmt. |
| 262 | 20 0x200 |
| 263 | 30 0x300 |
| 264 | 10 0x400 - for the increment part of a for stmt. |
| 265 | |
| 266 | arrange_linetable() will do this sorting. |
| 267 | |
| 268 | 2) aix symbol table might look like: |
| 269 | |
| 270 | c_file // beginning of a new file |
| 271 | .bi // beginning of include file |
| 272 | .ei // end of include file |
| 273 | .bi |
| 274 | .ei |
| 275 | |
| 276 | basically, .bi/.ei pairs do not necessarily encapsulate |
| 277 | their scope. They need to be recorded, and processed later |
| 278 | on when we come the end of the compilation unit. |
| 279 | Include table (inclTable) and process_linenos() handle |
| 280 | that. */ |
| 281 | |
| 282 | /* compare line table entry addresses. */ |
| 283 | |
| 284 | static int |
| 285 | compare_lte (lte1, lte2) |
| 286 | struct linetable_entry *lte1, *lte2; |
| 287 | { |
| 288 | return lte1->pc - lte2->pc; |
| 289 | } |
| 290 | |
| 291 | /* Give a line table with function entries are marked, arrange its functions |
| 292 | in assending order and strip off function entry markers and return it in |
| 293 | a newly created table. If the old one is good enough, return the old one. */ |
| 294 | /* FIXME: I think all this stuff can be replaced by just passing |
| 295 | sort_linevec = 1 to end_symtab. */ |
| 296 | |
| 297 | static struct linetable * |
| 298 | arrange_linetable (oldLineTb) |
| 299 | struct linetable *oldLineTb; /* old linetable */ |
| 300 | { |
| 301 | int ii, jj, |
| 302 | newline, /* new line count */ |
| 303 | function_count; /* # of functions */ |
| 304 | |
| 305 | struct linetable_entry *fentry; /* function entry vector */ |
| 306 | int fentry_size; /* # of function entries */ |
| 307 | struct linetable *newLineTb; /* new line table */ |
| 308 | |
| 309 | #define NUM_OF_FUNCTIONS 20 |
| 310 | |
| 311 | fentry_size = NUM_OF_FUNCTIONS; |
| 312 | fentry = (struct linetable_entry*) |
| 313 | xmalloc (fentry_size * sizeof (struct linetable_entry)); |
| 314 | |
| 315 | for (function_count=0, ii=0; ii <oldLineTb->nitems; ++ii) { |
| 316 | |
| 317 | if (oldLineTb->item[ii].line == 0) { /* function entry found. */ |
| 318 | |
| 319 | if (function_count >= fentry_size) { /* make sure you have room. */ |
| 320 | fentry_size *= 2; |
| 321 | fentry = (struct linetable_entry*) |
| 322 | xrealloc (fentry, fentry_size * sizeof (struct linetable_entry)); |
| 323 | } |
| 324 | fentry[function_count].line = ii; |
| 325 | fentry[function_count].pc = oldLineTb->item[ii].pc; |
| 326 | ++function_count; |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | if (function_count == 0) { |
| 331 | free (fentry); |
| 332 | return oldLineTb; |
| 333 | } |
| 334 | else if (function_count > 1) |
| 335 | qsort (fentry, function_count, sizeof(struct linetable_entry), compare_lte); |
| 336 | |
| 337 | /* allocate a new line table. */ |
| 338 | newLineTb = (struct linetable *) |
| 339 | xmalloc |
| 340 | (sizeof (struct linetable) + |
| 341 | (oldLineTb->nitems - function_count) * sizeof (struct linetable_entry)); |
| 342 | |
| 343 | /* if line table does not start with a function beginning, copy up until |
| 344 | a function begin. */ |
| 345 | |
| 346 | newline = 0; |
| 347 | if (oldLineTb->item[0].line != 0) |
| 348 | for (newline=0; |
| 349 | newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline) |
| 350 | newLineTb->item[newline] = oldLineTb->item[newline]; |
| 351 | |
| 352 | /* Now copy function lines one by one. */ |
| 353 | |
| 354 | for (ii=0; ii < function_count; ++ii) { |
| 355 | for (jj = fentry[ii].line + 1; |
| 356 | jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0; |
| 357 | ++jj, ++newline) |
| 358 | newLineTb->item[newline] = oldLineTb->item[jj]; |
| 359 | } |
| 360 | free (fentry); |
| 361 | newLineTb->nitems = oldLineTb->nitems - function_count; |
| 362 | return newLineTb; |
| 363 | } |
| 364 | |
| 365 | |
| 366 | |
| 367 | /* We try to detect the beginning of a compilation unit. That info will |
| 368 | be used as an entry in line number recording routines (enter_line_range) */ |
| 369 | |
| 370 | static unsigned first_fun_line_offset; |
| 371 | static unsigned first_fun_bf; |
| 372 | |
| 373 | #define mark_first_line(OFFSET, SYMNUM) \ |
| 374 | if (!first_fun_line_offset) { \ |
| 375 | first_fun_line_offset = OFFSET; \ |
| 376 | first_fun_bf = SYMNUM; \ |
| 377 | } |
| 378 | |
| 379 | |
| 380 | /* include file support: C_BINCL/C_EINCL pairs will be kept in the |
| 381 | following `IncludeChain'. At the end of each symtab (end_symtab), |
| 382 | we will determine if we should create additional symtab's to |
| 383 | represent if (the include files. */ |
| 384 | |
| 385 | |
| 386 | typedef struct _inclTable { |
| 387 | char *name; /* include filename */ |
| 388 | |
| 389 | /* Offsets to the line table. end points to the last entry which is |
| 390 | part of this include file. */ |
| 391 | int begin, end; |
| 392 | |
| 393 | struct subfile *subfile; |
| 394 | unsigned funStartLine; /* start line # of its function */ |
| 395 | } InclTable; |
| 396 | |
| 397 | #define INITIAL_INCLUDE_TABLE_LENGTH 20 |
| 398 | static InclTable *inclTable; /* global include table */ |
| 399 | static int inclIndx; /* last entry to table */ |
| 400 | static int inclLength; /* table length */ |
| 401 | static int inclDepth; /* nested include depth */ |
| 402 | |
| 403 | |
| 404 | static void |
| 405 | record_include_begin (cs) |
| 406 | struct coff_symbol *cs; |
| 407 | { |
| 408 | if (inclDepth) |
| 409 | { |
| 410 | /* In xcoff, we assume include files cannot be nested (not in .c files |
| 411 | of course, but in corresponding .s files.). */ |
| 412 | |
| 413 | /* This can happen with old versions of GCC. |
| 414 | GCC 2.3.3-930426 does not exhibit this on a test case which |
| 415 | a user said produced the message for him. */ |
| 416 | static struct complaint msg = {"Nested C_BINCL symbols", 0, 0}; |
| 417 | complain (&msg); |
| 418 | } |
| 419 | ++inclDepth; |
| 420 | |
| 421 | /* allocate an include file, or make room for the new entry */ |
| 422 | if (inclLength == 0) { |
| 423 | inclTable = (InclTable*) |
| 424 | xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); |
| 425 | memset (inclTable, '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); |
| 426 | inclLength = INITIAL_INCLUDE_TABLE_LENGTH; |
| 427 | inclIndx = 0; |
| 428 | } |
| 429 | else if (inclIndx >= inclLength) { |
| 430 | inclLength += INITIAL_INCLUDE_TABLE_LENGTH; |
| 431 | inclTable = (InclTable*) |
| 432 | xrealloc (inclTable, sizeof (InclTable) * inclLength); |
| 433 | memset (inclTable+inclLength-INITIAL_INCLUDE_TABLE_LENGTH, |
| 434 | '\0', sizeof (InclTable)*INITIAL_INCLUDE_TABLE_LENGTH); |
| 435 | } |
| 436 | |
| 437 | inclTable [inclIndx].name = cs->c_name; |
| 438 | inclTable [inclIndx].begin = cs->c_value; |
| 439 | } |
| 440 | |
| 441 | |
| 442 | static void |
| 443 | record_include_end (cs) |
| 444 | struct coff_symbol *cs; |
| 445 | { |
| 446 | InclTable *pTbl; |
| 447 | |
| 448 | if (inclDepth == 0) |
| 449 | { |
| 450 | static struct complaint msg = {"Mismatched C_BINCL/C_EINCL pair", 0, 0}; |
| 451 | complain (&msg); |
| 452 | } |
| 453 | |
| 454 | pTbl = &inclTable [inclIndx]; |
| 455 | pTbl->end = cs->c_value; |
| 456 | |
| 457 | --inclDepth; |
| 458 | ++inclIndx; |
| 459 | } |
| 460 | |
| 461 | |
| 462 | /* given the start and end addresses of a compilation unit (or a csect, at times) |
| 463 | process its lines and create appropriate line vectors. */ |
| 464 | |
| 465 | static void |
| 466 | process_linenos (start, end) |
| 467 | CORE_ADDR start, end; |
| 468 | { |
| 469 | char *pp; |
| 470 | int offset, ii; |
| 471 | |
| 472 | struct subfile main_subfile; /* subfile structure for the main |
| 473 | compilation unit. */ |
| 474 | |
| 475 | /* in the main source file, any time we see a function entry, we reset |
| 476 | this variable to function's absolute starting line number. All the |
| 477 | following line numbers in the function are relative to this, and |
| 478 | we record absolute line numbers in record_line(). */ |
| 479 | |
| 480 | int main_source_baseline = 0; |
| 481 | |
| 482 | |
| 483 | unsigned *firstLine; |
| 484 | CORE_ADDR addr; |
| 485 | |
| 486 | if (!(offset = first_fun_line_offset)) |
| 487 | goto return_after_cleanup; |
| 488 | |
| 489 | memset (&main_subfile, '\0', sizeof (main_subfile)); |
| 490 | first_fun_line_offset = 0; |
| 491 | |
| 492 | if (inclIndx == 0) |
| 493 | /* All source lines were in the main source file. None in include files. */ |
| 494 | |
| 495 | enter_line_range (&main_subfile, offset, 0, start, end, |
| 496 | &main_source_baseline); |
| 497 | |
| 498 | /* else, there was source with line numbers in include files */ |
| 499 | else { |
| 500 | |
| 501 | main_source_baseline = 0; |
| 502 | for (ii=0; ii < inclIndx; ++ii) { |
| 503 | |
| 504 | struct subfile *tmpSubfile; |
| 505 | |
| 506 | /* if there is main file source before include file, enter it. */ |
| 507 | if (offset < inclTable[ii].begin) { |
| 508 | enter_line_range |
| 509 | (&main_subfile, offset, inclTable[ii].begin - LINESZ, start, 0, |
| 510 | &main_source_baseline); |
| 511 | } |
| 512 | |
| 513 | /* Have a new subfile for the include file */ |
| 514 | |
| 515 | tmpSubfile = inclTable[ii].subfile = (struct subfile*) |
| 516 | xmalloc (sizeof (struct subfile)); |
| 517 | |
| 518 | memset (tmpSubfile, '\0', sizeof (struct subfile)); |
| 519 | firstLine = &(inclTable[ii].funStartLine); |
| 520 | |
| 521 | /* enter include file's lines now. */ |
| 522 | enter_line_range (tmpSubfile, inclTable[ii].begin, |
| 523 | inclTable[ii].end, start, 0, firstLine); |
| 524 | |
| 525 | offset = inclTable[ii].end + LINESZ; |
| 526 | } |
| 527 | |
| 528 | /* all the include files' line have been processed at this point. Now, |
| 529 | enter remaining lines of the main file, if any left. */ |
| 530 | if (offset < (linetab_offset + linetab_size + 1 - LINESZ)) { |
| 531 | enter_line_range (&main_subfile, offset, 0, start, end, |
| 532 | &main_source_baseline); |
| 533 | } |
| 534 | } |
| 535 | |
| 536 | /* Process main file's line numbers. */ |
| 537 | if (main_subfile.line_vector) { |
| 538 | struct linetable *lineTb, *lv; |
| 539 | |
| 540 | lv = main_subfile.line_vector; |
| 541 | |
| 542 | /* Line numbers are not necessarily ordered. xlc compilation will |
| 543 | put static function to the end. */ |
| 544 | |
| 545 | lineTb = arrange_linetable (lv); |
| 546 | if (lv == lineTb) { |
| 547 | current_subfile->line_vector = (struct linetable *) |
| 548 | xrealloc (lv, (sizeof (struct linetable) |
| 549 | + lv->nitems * sizeof (struct linetable_entry))); |
| 550 | |
| 551 | } |
| 552 | else { |
| 553 | free (lv); |
| 554 | current_subfile->line_vector = lineTb; |
| 555 | } |
| 556 | |
| 557 | current_subfile->line_vector_length = |
| 558 | current_subfile->line_vector->nitems; |
| 559 | } |
| 560 | |
| 561 | /* Now, process included files' line numbers. */ |
| 562 | |
| 563 | for (ii=0; ii < inclIndx; ++ii) { |
| 564 | |
| 565 | if ( (inclTable[ii].subfile)->line_vector) { /* Useless if!!! FIXMEmgo */ |
| 566 | struct linetable *lineTb, *lv; |
| 567 | |
| 568 | lv = (inclTable[ii].subfile)->line_vector; |
| 569 | |
| 570 | /* Line numbers are not necessarily ordered. xlc compilation will |
| 571 | put static function to the end. */ |
| 572 | |
| 573 | lineTb = arrange_linetable (lv); |
| 574 | |
| 575 | push_subfile (); |
| 576 | |
| 577 | /* For the same include file, we might want to have more than one subfile. |
| 578 | This happens if we have something like: |
| 579 | |
| 580 | ...... |
| 581 | #include "foo.h" |
| 582 | ...... |
| 583 | #include "foo.h" |
| 584 | ...... |
| 585 | |
| 586 | while foo.h including code in it. (stupid but possible) |
| 587 | Since start_subfile() looks at the name and uses an existing one if finds, |
| 588 | we need to provide a fake name and fool it. */ |
| 589 | |
| 590 | /* start_subfile (inclTable[ii].name, (char*)0); */ |
| 591 | start_subfile (" ?", (char*)0); |
| 592 | free (current_subfile->name); |
| 593 | current_subfile->name = strdup (inclTable[ii].name); |
| 594 | |
| 595 | if (lv == lineTb) { |
| 596 | current_subfile->line_vector = (struct linetable *) |
| 597 | xrealloc (lv, (sizeof (struct linetable) |
| 598 | + lv->nitems * sizeof (struct linetable_entry))); |
| 599 | |
| 600 | } |
| 601 | else { |
| 602 | free (lv); |
| 603 | current_subfile->line_vector = lineTb; |
| 604 | } |
| 605 | |
| 606 | current_subfile->line_vector_length = |
| 607 | current_subfile->line_vector->nitems; |
| 608 | start_subfile (pop_subfile (), (char*)0); |
| 609 | } |
| 610 | } |
| 611 | |
| 612 | return_after_cleanup: |
| 613 | |
| 614 | /* We don't want to keep alloc/free'ing the global include file table. */ |
| 615 | inclIndx = 0; |
| 616 | |
| 617 | /* start with a fresh subfile structure for the next file. */ |
| 618 | memset (&main_subfile, '\0', sizeof (struct subfile)); |
| 619 | } |
| 620 | |
| 621 | void |
| 622 | aix_process_linenos () |
| 623 | { |
| 624 | /* process line numbers and enter them into line vector */ |
| 625 | process_linenos (last_source_start_addr, cur_src_end_addr); |
| 626 | } |
| 627 | |
| 628 | |
| 629 | /* Enter a given range of lines into the line vector. |
| 630 | can be called in the following two ways: |
| 631 | enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or |
| 632 | enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine) |
| 633 | |
| 634 | endoffset points to the last line table entry that we should pay |
| 635 | attention to. */ |
| 636 | |
| 637 | static void |
| 638 | enter_line_range (subfile, beginoffset, endoffset, startaddr, endaddr, firstLine) |
| 639 | struct subfile *subfile; |
| 640 | unsigned beginoffset, endoffset; /* offsets to line table */ |
| 641 | CORE_ADDR startaddr, endaddr; |
| 642 | unsigned *firstLine; |
| 643 | { |
| 644 | char *pp, *limit; |
| 645 | CORE_ADDR addr; |
| 646 | |
| 647 | /* Do Byte swapping, if needed. FIXME! */ |
| 648 | #define P_LINENO(PP) (*(unsigned short*)((struct external_lineno*)(PP))->l_lnno) |
| 649 | #define P_LINEADDR(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_paddr) |
| 650 | #define P_LINESYM(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_symndx) |
| 651 | |
| 652 | pp = &linetab [beginoffset - linetab_offset]; |
| 653 | if (endoffset != 0 && endoffset - linetab_offset >= linetab_size) |
| 654 | { |
| 655 | static struct complaint msg = |
| 656 | {"Bad line table offset in C_EINCL directive", 0, 0}; |
| 657 | complain (&msg); |
| 658 | return; |
| 659 | } |
| 660 | limit = endoffset ? &linetab [endoffset - linetab_offset] |
| 661 | : &linetab [linetab_size -1]; |
| 662 | |
| 663 | while (pp <= limit) { |
| 664 | |
| 665 | /* find the address this line represents */ |
| 666 | addr = P_LINENO(pp) ? |
| 667 | P_LINEADDR(pp) : read_symbol_nvalue (P_LINESYM(pp)); |
| 668 | |
| 669 | if (addr < startaddr || (endaddr && addr >= endaddr)) |
| 670 | return; |
| 671 | |
| 672 | if (P_LINENO(pp) == 0) { |
| 673 | *firstLine = read_symbol_lineno (P_LINESYM(pp)); |
| 674 | record_line (subfile, 0, addr); |
| 675 | --(*firstLine); |
| 676 | } |
| 677 | else |
| 678 | record_line (subfile, *firstLine + P_LINENO(pp), addr); |
| 679 | |
| 680 | pp += LINESZ; |
| 681 | } |
| 682 | } |
| 683 | |
| 684 | typedef struct { |
| 685 | int fsize; /* file size */ |
| 686 | int fixedparms; /* number of fixed parms */ |
| 687 | int floatparms; /* number of float parms */ |
| 688 | unsigned int parminfo; /* parameter info. |
| 689 | See /usr/include/sys/debug.h |
| 690 | tbtable_ext.parminfo */ |
| 691 | int framesize; /* function frame size */ |
| 692 | } TracebackInfo; |
| 693 | |
| 694 | |
| 695 | /* Given a function symbol, return its traceback information. */ |
| 696 | |
| 697 | TracebackInfo * |
| 698 | retrieve_tracebackinfo (abfd, textsec, cs) |
| 699 | bfd *abfd; |
| 700 | sec_ptr textsec; |
| 701 | struct coff_symbol *cs; |
| 702 | { |
| 703 | #define TBTABLE_BUFSIZ 2000 |
| 704 | |
| 705 | static TracebackInfo tbInfo; |
| 706 | struct tbtable *ptb; |
| 707 | |
| 708 | static char buffer [TBTABLE_BUFSIZ]; |
| 709 | |
| 710 | int *pinsn; |
| 711 | int bytesread=0; /* total # of bytes read so far */ |
| 712 | int bufferbytes; /* number of bytes in the buffer */ |
| 713 | |
| 714 | int functionstart = cs->c_value - textsec->vma; |
| 715 | |
| 716 | memset (&tbInfo, '\0', sizeof (tbInfo)); |
| 717 | |
| 718 | /* keep reading blocks of data from the text section, until finding a zero |
| 719 | word and a traceback table. */ |
| 720 | |
| 721 | /* Note: The logical thing way to write this code would be to assign |
| 722 | to bufferbytes within the while condition. But that triggers a |
| 723 | compiler (xlc in AIX 3.2) bug, so simplify it... */ |
| 724 | bufferbytes = |
| 725 | (TBTABLE_BUFSIZ < (textsec->_raw_size - functionstart - bytesread) ? |
| 726 | TBTABLE_BUFSIZ : (textsec->_raw_size - functionstart - bytesread)); |
| 727 | while (bufferbytes |
| 728 | && (bfd_get_section_contents |
| 729 | (abfd, textsec, buffer, |
| 730 | (file_ptr)(functionstart + bytesread), bufferbytes))) |
| 731 | { |
| 732 | bytesread += bufferbytes; |
| 733 | pinsn = (int*) buffer; |
| 734 | |
| 735 | /* if this is the first time we filled the buffer, retrieve function |
| 736 | framesize info. */ |
| 737 | |
| 738 | if (bytesread == bufferbytes) { |
| 739 | |
| 740 | /* skip over unrelated instructions */ |
| 741 | |
| 742 | if (*pinsn == 0x7c0802a6) /* mflr r0 */ |
| 743 | ++pinsn; |
| 744 | if ((*pinsn & 0xfc00003e) == 0x7c000026) /* mfcr Rx */ |
| 745 | ++pinsn; |
| 746 | if ((*pinsn & 0xfc000000) == 0x48000000) /* bl foo, save fprs */ |
| 747 | ++pinsn; |
| 748 | if ((*pinsn & 0xfc1f0000) == 0xbc010000) /* stm Rx, NUM(r1) */ |
| 749 | ++pinsn; |
| 750 | |
| 751 | do { |
| 752 | int tmp = (*pinsn >> 16) & 0xffff; |
| 753 | |
| 754 | if (tmp == 0x9421) { /* stu r1, NUM(r1) */ |
| 755 | tbInfo.framesize = 0x10000 - (*pinsn & 0xffff); |
| 756 | break; |
| 757 | } |
| 758 | else if ((*pinsn == 0x93e1fffc) || /* st r31,-4(r1) */ |
| 759 | (tmp == 0x9001)) /* st r0, NUM(r1) */ |
| 760 | ; |
| 761 | /* else, could not find a frame size. */ |
| 762 | else |
| 763 | return NULL; |
| 764 | |
| 765 | } while (++pinsn && *pinsn); |
| 766 | |
| 767 | if (!tbInfo.framesize) |
| 768 | return NULL; |
| 769 | |
| 770 | } |
| 771 | |
| 772 | /* look for a zero word. */ |
| 773 | |
| 774 | while (*pinsn && (pinsn < (int*)(buffer + bufferbytes - sizeof(int)))) |
| 775 | ++pinsn; |
| 776 | |
| 777 | if (pinsn >= (int*)(buffer + bufferbytes)) |
| 778 | continue; |
| 779 | |
| 780 | if (*pinsn == 0) { |
| 781 | |
| 782 | /* function size is the amount of bytes we have skipped so far. */ |
| 783 | tbInfo.fsize = bytesread - (buffer + bufferbytes - (char*)pinsn); |
| 784 | |
| 785 | ++pinsn; |
| 786 | |
| 787 | /* if we don't have the whole traceback table in the buffer, re-read |
| 788 | the whole thing. */ |
| 789 | |
| 790 | /* This is how much to read to get the traceback table. |
| 791 | 8 bytes of the traceback table are always present, plus we |
| 792 | look at parminfo. */ |
| 793 | #define MIN_TBTABSIZ 12 |
| 794 | |
| 795 | if ((char*)pinsn > (buffer + bufferbytes - MIN_TBTABSIZ)) { |
| 796 | |
| 797 | /* In case if we are *very* close to the end of the text section |
| 798 | and cannot read properly from that point on, abort by returning |
| 799 | NULL. |
| 800 | |
| 801 | This could happen if the traceback table is only 8 bytes, |
| 802 | but we try to read 12 bytes of it. |
| 803 | Handle this case more graciously -- FIXME */ |
| 804 | |
| 805 | if (!bfd_get_section_contents ( |
| 806 | abfd, textsec, buffer, |
| 807 | (file_ptr)(functionstart + |
| 808 | bytesread - (buffer + bufferbytes - (char*)pinsn)),MIN_TBTABSIZ)) |
| 809 | { printf_unfiltered ("Abnormal return!..\n"); return NULL; } |
| 810 | |
| 811 | ptb = (struct tbtable *)buffer; |
| 812 | } |
| 813 | else |
| 814 | ptb = (struct tbtable *)pinsn; |
| 815 | |
| 816 | tbInfo.fixedparms = ptb->tb.fixedparms; |
| 817 | tbInfo.floatparms = ptb->tb.floatparms; |
| 818 | tbInfo.parminfo = ptb->tb_ext.parminfo; |
| 819 | return &tbInfo; |
| 820 | } |
| 821 | bufferbytes = |
| 822 | (TBTABLE_BUFSIZ < (textsec->_raw_size - functionstart - bytesread) ? |
| 823 | TBTABLE_BUFSIZ : (textsec->_raw_size - functionstart - bytesread)); |
| 824 | } |
| 825 | return NULL; |
| 826 | } |
| 827 | |
| 828 | #if 0 |
| 829 | /* Given a function symbol, return a pointer to its traceback table. */ |
| 830 | |
| 831 | struct tbtable * |
| 832 | retrieve_traceback (abfd, textsec, cs, size) |
| 833 | bfd *abfd; |
| 834 | sec_ptr textsec; |
| 835 | struct coff_symbol *cs; |
| 836 | int *size; /* return function size */ |
| 837 | { |
| 838 | #define TBTABLE_BUFSIZ 2000 |
| 839 | #define MIN_TBTABSIZ 50 /* minimum buffer size to hold a |
| 840 | traceback table. */ |
| 841 | |
| 842 | static char buffer [TBTABLE_BUFSIZ]; |
| 843 | |
| 844 | int *pinsn; |
| 845 | int bytesread=0; /* total # of bytes read so far */ |
| 846 | int bufferbytes; /* number of bytes in the buffer */ |
| 847 | |
| 848 | int functionstart = cs->c_value - textsec->filepos + textsec->vma; |
| 849 | *size = 0; |
| 850 | |
| 851 | /* keep reading blocks of data from the text section, until finding a zero |
| 852 | word and a traceback table. */ |
| 853 | |
| 854 | while (bfd_get_section_contents (abfd, textsec, buffer, |
| 855 | (file_ptr)(functionstart + bytesread), |
| 856 | bufferbytes = ( |
| 857 | (TBTABLE_BUFSIZ < (textsec->size - functionstart - bytesread)) ? |
| 858 | TBTABLE_BUFSIZ : (textsec->size - functionstart - bytesread)))) |
| 859 | { |
| 860 | bytesread += bufferbytes; |
| 861 | pinsn = (int*) buffer; |
| 862 | |
| 863 | /* look for a zero word. */ |
| 864 | |
| 865 | while (*pinsn && (pinsn < (int*)(buffer + bufferbytes - sizeof(int)))) |
| 866 | ++pinsn; |
| 867 | |
| 868 | if (pinsn >= (int*)(buffer + bufferbytes)) |
| 869 | continue; |
| 870 | |
| 871 | if (*pinsn == 0) { |
| 872 | |
| 873 | /* function size is the amount of bytes we have skipped so far. */ |
| 874 | *size = bytesread - (buffer + bufferbytes - pinsn); |
| 875 | |
| 876 | ++pinsn; |
| 877 | |
| 878 | /* if we don't have the whole traceback table in the buffer, re-read |
| 879 | the whole thing. */ |
| 880 | |
| 881 | if ((char*)pinsn > (buffer + bufferbytes - MIN_TBTABSIZ)) { |
| 882 | |
| 883 | /* In case if we are *very* close to the end of the text section |
| 884 | and cannot read properly from that point on, abort for now. |
| 885 | Handle this case more graciously -- FIXME */ |
| 886 | |
| 887 | if (!bfd_get_section_contents ( |
| 888 | abfd, textsec, buffer, |
| 889 | (file_ptr)(functionstart + |
| 890 | bytesread - (buffer + bufferbytes - pinsn)),MIN_TBTABSIZ)) |
| 891 | /* abort (); */ { printf_unfiltered ("abort!!!\n"); return NULL; } |
| 892 | |
| 893 | return (struct tbtable *)buffer; |
| 894 | } |
| 895 | else |
| 896 | return (struct tbtable *)pinsn; |
| 897 | } |
| 898 | } |
| 899 | return NULL; |
| 900 | } |
| 901 | #endif /* 0 */ |
| 902 | |
| 903 | |
| 904 | |
| 905 | |
| 906 | /* Save the vital information for use when closing off the current file. |
| 907 | NAME is the file name the symbols came from, START_ADDR is the first |
| 908 | text address for the file, and SIZE is the number of bytes of text. */ |
| 909 | |
| 910 | #define complete_symtab(name, start_addr) { \ |
| 911 | last_source_file = savestring (name, strlen (name)); \ |
| 912 | last_source_start_addr = start_addr; \ |
| 913 | } |
| 914 | |
| 915 | |
| 916 | /* Refill the symbol table input buffer |
| 917 | and set the variables that control fetching entries from it. |
| 918 | Reports an error if no data available. |
| 919 | This function can read past the end of the symbol table |
| 920 | (into the string table) but this does no harm. */ |
| 921 | |
| 922 | /* Reading symbol table has to be fast! Keep the followings as macros, rather |
| 923 | than functions. */ |
| 924 | |
| 925 | #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, ALLOCED, SECTION, OBJFILE) \ |
| 926 | { \ |
| 927 | char *namestr; \ |
| 928 | if (ALLOCED) \ |
| 929 | namestr = (NAME) + 1; \ |
| 930 | else { \ |
| 931 | (NAME) = namestr = \ |
| 932 | obstack_copy0 (&objfile->symbol_obstack, (NAME) + 1, strlen ((NAME)+1)); \ |
| 933 | (ALLOCED) = 1; \ |
| 934 | } \ |
| 935 | prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \ |
| 936 | (char *)NULL, (SECTION), (OBJFILE)); \ |
| 937 | misc_func_recorded = 1; \ |
| 938 | } |
| 939 | |
| 940 | |
| 941 | /* A parameter template, used by ADD_PARM_TO_PENDING. It is initialized |
| 942 | in our initializer function at the bottom of the file, to avoid |
| 943 | dependencies on the exact "struct symbol" format. */ |
| 944 | |
| 945 | static struct symbol parmsym; |
| 946 | |
| 947 | /* Add a parameter to a given pending symbol list. */ |
| 948 | |
| 949 | #define ADD_PARM_TO_PENDING(PARM, VALUE, PTYPE, PENDING_SYMBOLS) \ |
| 950 | { \ |
| 951 | PARM = (struct symbol *) \ |
| 952 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \ |
| 953 | *(PARM) = parmsym; \ |
| 954 | SYMBOL_TYPE (PARM) = PTYPE; \ |
| 955 | SYMBOL_VALUE (PARM) = VALUE; \ |
| 956 | add_symbol_to_list (PARM, &PENDING_SYMBOLS); \ |
| 957 | } |
| 958 | |
| 959 | |
| 960 | /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be |
| 961 | nested. At any given time, a symbol can only be in one static block. |
| 962 | This is the base address of current static block, zero if non exists. */ |
| 963 | |
| 964 | static int static_block_base = 0; |
| 965 | |
| 966 | /* Section number for the current static block. */ |
| 967 | |
| 968 | static int static_block_section = -1; |
| 969 | |
| 970 | /* true if space for symbol name has been allocated. */ |
| 971 | |
| 972 | static int symname_alloced = 0; |
| 973 | |
| 974 | /* read the whole symbol table of a given bfd. */ |
| 975 | |
| 976 | static void |
| 977 | read_xcoff_symtab (objfile, nsyms) |
| 978 | struct objfile *objfile; /* Object file we're reading from */ |
| 979 | int nsyms; /* # of symbols */ |
| 980 | { |
| 981 | bfd *abfd = objfile->obfd; |
| 982 | char *raw_symbol; /* Pointer into raw seething symbol table */ |
| 983 | char *raw_auxptr; /* Pointer to first raw aux entry for sym */ |
| 984 | sec_ptr textsec; /* Pointer to text section */ |
| 985 | TracebackInfo *ptb; /* Pointer to traceback table */ |
| 986 | |
| 987 | struct internal_syment symbol[1]; |
| 988 | union internal_auxent main_aux; |
| 989 | struct coff_symbol cs[1]; |
| 990 | CORE_ADDR file_start_addr = 0; |
| 991 | CORE_ADDR file_end_addr = 0; |
| 992 | |
| 993 | int next_file_symnum = -1; |
| 994 | int just_started = 1; |
| 995 | int depth = 0; |
| 996 | int toc_offset = 0; /* toc offset value in data section. */ |
| 997 | int val; |
| 998 | int fcn_last_line; |
| 999 | int fcn_start_addr; |
| 1000 | long fcn_line_offset; |
| 1001 | size_t size; |
| 1002 | |
| 1003 | struct coff_symbol fcn_stab_saved; |
| 1004 | |
| 1005 | /* fcn_cs_saved is global because process_xcoff_symbol needs it. */ |
| 1006 | union internal_auxent fcn_aux_saved; |
| 1007 | struct type *fcn_type_saved = NULL; |
| 1008 | struct context_stack *new; |
| 1009 | |
| 1010 | char *filestring = " _start_ "; /* Name of the current file. */ |
| 1011 | |
| 1012 | char *last_csect_name; /* last seen csect's name and value */ |
| 1013 | CORE_ADDR last_csect_val; |
| 1014 | int last_csect_sec; |
| 1015 | int misc_func_recorded; /* true if any misc. function */ |
| 1016 | |
| 1017 | current_objfile = objfile; |
| 1018 | |
| 1019 | /* Get the appropriate COFF "constants" related to the file we're handling. */ |
| 1020 | N_TMASK = coff_data (abfd)->local_n_tmask; |
| 1021 | N_BTSHFT = coff_data (abfd)->local_n_btshft; |
| 1022 | local_symesz = coff_data (abfd)->local_symesz; |
| 1023 | |
| 1024 | last_source_file = NULL; |
| 1025 | last_csect_name = 0; |
| 1026 | last_csect_val = 0; |
| 1027 | misc_func_recorded = 0; |
| 1028 | |
| 1029 | start_stabs (); |
| 1030 | start_symtab (filestring, (char *)NULL, file_start_addr); |
| 1031 | symnum = 0; |
| 1032 | first_object_file_end = 0; |
| 1033 | |
| 1034 | /* Allocate space for the entire symbol table at once, and read it |
| 1035 | all in. The bfd is already positioned at the beginning of |
| 1036 | the symbol table. */ |
| 1037 | |
| 1038 | size = coff_data (abfd)->local_symesz * nsyms; |
| 1039 | symtbl = xmalloc (size); |
| 1040 | symtbl_num_syms = nsyms; |
| 1041 | |
| 1042 | val = bfd_read (symtbl, size, 1, abfd); |
| 1043 | if (val != size) |
| 1044 | perror_with_name ("reading symbol table"); |
| 1045 | |
| 1046 | raw_symbol = symtbl; |
| 1047 | |
| 1048 | textsec = bfd_get_section_by_name (abfd, ".text"); |
| 1049 | if (!textsec) { |
| 1050 | printf_unfiltered ("Unable to locate text section!\n"); |
| 1051 | } |
| 1052 | |
| 1053 | while (symnum < nsyms) { |
| 1054 | |
| 1055 | QUIT; /* make this command interruptable. */ |
| 1056 | |
| 1057 | /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */ |
| 1058 | /* read one symbol into `cs' structure. After processing the whole symbol |
| 1059 | table, only string table will be kept in memory, symbol table and debug |
| 1060 | section of xcoff will be freed. Thus we can mark symbols with names |
| 1061 | in string table as `alloced'. */ |
| 1062 | { |
| 1063 | int ii; |
| 1064 | |
| 1065 | /* Swap and align the symbol into a reasonable C structure. */ |
| 1066 | bfd_coff_swap_sym_in (abfd, raw_symbol, symbol); |
| 1067 | |
| 1068 | cs->c_symnum = symnum; |
| 1069 | cs->c_naux = symbol->n_numaux; |
| 1070 | if (symbol->n_zeroes) { |
| 1071 | symname_alloced = 0; |
| 1072 | /* We must use the original, unswapped, name here so the name field |
| 1073 | pointed to by cs->c_name will persist throughout xcoffread. If |
| 1074 | we use the new field, it gets overwritten for each symbol. */ |
| 1075 | cs->c_name = ((struct external_syment *)raw_symbol)->e.e_name; |
| 1076 | /* If it's exactly E_SYMNMLEN characters long it isn't |
| 1077 | '\0'-terminated. */ |
| 1078 | if (cs->c_name[E_SYMNMLEN - 1] != '\0') |
| 1079 | { |
| 1080 | char *p; |
| 1081 | p = obstack_alloc (&objfile->symbol_obstack, E_SYMNMLEN + 1); |
| 1082 | strncpy (p, cs->c_name, E_SYMNMLEN); |
| 1083 | p[E_SYMNMLEN] = '\0'; |
| 1084 | cs->c_name = p; |
| 1085 | symname_alloced = 1; |
| 1086 | } |
| 1087 | } else if (symbol->n_sclass & 0x80) { |
| 1088 | cs->c_name = debugsec + symbol->n_offset; |
| 1089 | symname_alloced = 0; |
| 1090 | } else { /* in string table */ |
| 1091 | cs->c_name = strtbl + (int)symbol->n_offset; |
| 1092 | symname_alloced = 1; |
| 1093 | } |
| 1094 | cs->c_value = symbol->n_value; |
| 1095 | cs->c_sclass = symbol->n_sclass; |
| 1096 | cs->c_secnum = symbol->n_scnum; |
| 1097 | cs->c_type = (unsigned)symbol->n_type; |
| 1098 | |
| 1099 | raw_symbol += coff_data (abfd)->local_symesz; |
| 1100 | ++symnum; |
| 1101 | |
| 1102 | raw_auxptr = raw_symbol; /* Save addr of first aux entry */ |
| 1103 | |
| 1104 | /* Skip all the auxents associated with this symbol. */ |
| 1105 | for (ii = symbol->n_numaux; ii; --ii ) { |
| 1106 | raw_symbol += coff_data (abfd)->local_auxesz; |
| 1107 | ++symnum; |
| 1108 | } |
| 1109 | } |
| 1110 | |
| 1111 | /* if symbol name starts with ".$" or "$", ignore it. */ |
| 1112 | if (cs->c_name[0] == '$' || (cs->c_name[1] == '$' && cs->c_name[0] == '.')) |
| 1113 | continue; |
| 1114 | |
| 1115 | if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) { |
| 1116 | if (last_source_file) |
| 1117 | { |
| 1118 | end_symtab (cur_src_end_addr, 1, 0, objfile, textsec->target_index); |
| 1119 | end_stabs (); |
| 1120 | } |
| 1121 | |
| 1122 | start_stabs (); |
| 1123 | start_symtab ("_globals_", (char *)NULL, (CORE_ADDR)0); |
| 1124 | cur_src_end_addr = first_object_file_end; |
| 1125 | /* done with all files, everything from here on is globals */ |
| 1126 | } |
| 1127 | |
| 1128 | /* if explicitly specified as a function, treat is as one. */ |
| 1129 | if (ISFCN(cs->c_type) && cs->c_sclass != C_TPDEF) { |
| 1130 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1131 | &main_aux); |
| 1132 | goto function_entry_point; |
| 1133 | } |
| 1134 | |
| 1135 | if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT) && cs->c_naux == 1) |
| 1136 | { |
| 1137 | /* dealing with a symbol with a csect entry. */ |
| 1138 | |
| 1139 | # define CSECT(PP) ((PP)->x_csect) |
| 1140 | # define CSECT_LEN(PP) (CSECT(PP).x_scnlen) |
| 1141 | # define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp)) |
| 1142 | # define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp)) |
| 1143 | # define CSECT_SCLAS(PP) (CSECT(PP).x_smclas) |
| 1144 | |
| 1145 | /* Convert the auxent to something we can access. */ |
| 1146 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1147 | &main_aux); |
| 1148 | |
| 1149 | switch (CSECT_SMTYP (&main_aux)) { |
| 1150 | |
| 1151 | case XTY_ER : |
| 1152 | continue; /* ignore all external references. */ |
| 1153 | |
| 1154 | case XTY_SD : /* a section description. */ |
| 1155 | { |
| 1156 | switch (CSECT_SCLAS (&main_aux)) { |
| 1157 | |
| 1158 | case XMC_PR : /* a `.text' csect. */ |
| 1159 | { |
| 1160 | |
| 1161 | /* A program csect is seen. We have to allocate one |
| 1162 | symbol table for each program csect. Normally gdb |
| 1163 | prefers one symtab for each source file. In case |
| 1164 | of AIX, one source file might include more than one |
| 1165 | [PR] csect, and they don't have to be adjacent in |
| 1166 | terms of the space they occupy in memory. Thus, one |
| 1167 | single source file might get fragmented in the |
| 1168 | memory and gdb's file start and end address |
| 1169 | approach does not work! GCC (and I think xlc) seem |
| 1170 | to put all the code in the unnamed program csect. */ |
| 1171 | |
| 1172 | if (last_csect_name) { |
| 1173 | |
| 1174 | /* if no misc. function recorded in the last seen csect, enter |
| 1175 | it as a function. This will take care of functions like |
| 1176 | strcmp() compiled by xlc. */ |
| 1177 | |
| 1178 | if (!misc_func_recorded) { |
| 1179 | int alloced = 0; |
| 1180 | RECORD_MINIMAL_SYMBOL (last_csect_name, last_csect_val, |
| 1181 | mst_text, alloced, last_csect_sec, |
| 1182 | objfile); |
| 1183 | } |
| 1184 | |
| 1185 | |
| 1186 | complete_symtab (filestring, file_start_addr); |
| 1187 | cur_src_end_addr = file_end_addr; |
| 1188 | end_symtab (file_end_addr, 1, 0, objfile, |
| 1189 | textsec->target_index); |
| 1190 | end_stabs (); |
| 1191 | start_stabs (); |
| 1192 | /* Give all csects for this source file the same |
| 1193 | name. */ |
| 1194 | start_symtab (filestring, (char *)NULL, (CORE_ADDR)0); |
| 1195 | } |
| 1196 | |
| 1197 | /* If this is the very first csect seen, basically `__start'. */ |
| 1198 | if (just_started) { |
| 1199 | first_object_file_end = cs->c_value + CSECT_LEN (&main_aux); |
| 1200 | just_started = 0; |
| 1201 | } |
| 1202 | |
| 1203 | file_start_addr = cs->c_value; |
| 1204 | file_end_addr = cs->c_value + CSECT_LEN (&main_aux); |
| 1205 | |
| 1206 | if (cs->c_name && cs->c_name[0] == '.') { |
| 1207 | last_csect_name = cs->c_name; |
| 1208 | last_csect_val = cs->c_value; |
| 1209 | last_csect_sec = cs->c_secnum; |
| 1210 | } |
| 1211 | } |
| 1212 | misc_func_recorded = 0; |
| 1213 | continue; |
| 1214 | |
| 1215 | case XMC_RW : |
| 1216 | break; |
| 1217 | |
| 1218 | /* If the section is not a data description, ignore it. Note that |
| 1219 | uninitialized data will show up as XTY_CM/XMC_RW pair. */ |
| 1220 | |
| 1221 | case XMC_TC0: |
| 1222 | if (toc_offset) |
| 1223 | warning ("More than one xmc_tc0 symbol found."); |
| 1224 | toc_offset = cs->c_value; |
| 1225 | continue; |
| 1226 | |
| 1227 | case XMC_TC : /* ignore toc entries */ |
| 1228 | default : /* any other XMC_XXX */ |
| 1229 | continue; |
| 1230 | } |
| 1231 | } |
| 1232 | break; /* switch CSECT_SCLAS() */ |
| 1233 | |
| 1234 | case XTY_LD : |
| 1235 | |
| 1236 | /* a function entry point. */ |
| 1237 | if (CSECT_SCLAS (&main_aux) == XMC_PR) { |
| 1238 | |
| 1239 | function_entry_point: |
| 1240 | RECORD_MINIMAL_SYMBOL (cs->c_name, cs->c_value, mst_text, |
| 1241 | symname_alloced, cs->c_secnum, objfile); |
| 1242 | |
| 1243 | fcn_line_offset = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; |
| 1244 | fcn_start_addr = cs->c_value; |
| 1245 | |
| 1246 | /* save the function header info, which will be used |
| 1247 | when `.bf' is seen. */ |
| 1248 | fcn_cs_saved = *cs; |
| 1249 | fcn_aux_saved = main_aux; |
| 1250 | |
| 1251 | |
| 1252 | ptb = NULL; |
| 1253 | |
| 1254 | /* If function has two auxent, then debugging information is |
| 1255 | already available for it. Process traceback table for |
| 1256 | functions with only one auxent. */ |
| 1257 | |
| 1258 | if (cs->c_naux == 1) |
| 1259 | ptb = retrieve_tracebackinfo (abfd, textsec, cs); |
| 1260 | |
| 1261 | else if (cs->c_naux != 2) |
| 1262 | { |
| 1263 | static struct complaint msg = |
| 1264 | {"Expected one or two auxents for function", 0, 0}; |
| 1265 | complain (&msg); |
| 1266 | } |
| 1267 | |
| 1268 | /* If there is traceback info, create and add parameters for it. */ |
| 1269 | |
| 1270 | if (ptb && (ptb->fixedparms || ptb->floatparms)) { |
| 1271 | |
| 1272 | int parmcnt = ptb->fixedparms + ptb->floatparms; |
| 1273 | char *parmcode = (char*) &ptb->parminfo; |
| 1274 | int parmvalue = ptb->framesize + 0x18; /* sizeof(LINK AREA) == 0x18 */ |
| 1275 | unsigned int ii, mask; |
| 1276 | |
| 1277 | for (ii=0, mask = 0x80000000; ii <parmcnt; ++ii) { |
| 1278 | struct symbol *parm; |
| 1279 | |
| 1280 | if (ptb->parminfo & mask) { /* float or double */ |
| 1281 | mask = mask >> 1; |
| 1282 | if (ptb->parminfo & mask) { /* double parm */ |
| 1283 | ADD_PARM_TO_PENDING |
| 1284 | (parm, parmvalue, builtin_type_double, local_symbols); |
| 1285 | parmvalue += sizeof (double); |
| 1286 | } |
| 1287 | else { /* float parm */ |
| 1288 | ADD_PARM_TO_PENDING |
| 1289 | (parm, parmvalue, builtin_type_float, local_symbols); |
| 1290 | parmvalue += sizeof (float); |
| 1291 | } |
| 1292 | } |
| 1293 | else { /* fixed parm, use (int*) for hex rep. */ |
| 1294 | ADD_PARM_TO_PENDING (parm, parmvalue, |
| 1295 | lookup_pointer_type (builtin_type_int), |
| 1296 | local_symbols); |
| 1297 | parmvalue += sizeof (int); |
| 1298 | } |
| 1299 | mask = mask >> 1; |
| 1300 | } |
| 1301 | |
| 1302 | /* Fake this as a function. Needed in process_xcoff_symbol() */ |
| 1303 | cs->c_type = 32; |
| 1304 | |
| 1305 | finish_block(process_xcoff_symbol (cs, objfile), &local_symbols, |
| 1306 | pending_blocks, cs->c_value, |
| 1307 | cs->c_value + ptb->fsize, objfile); |
| 1308 | } |
| 1309 | continue; |
| 1310 | } |
| 1311 | /* shared library function trampoline code entry point. */ |
| 1312 | else if (CSECT_SCLAS (&main_aux) == XMC_GL) { |
| 1313 | |
| 1314 | /* record trampoline code entries as mst_unknown symbol. When we |
| 1315 | lookup mst symbols, we will choose mst_text over mst_unknown. */ |
| 1316 | |
| 1317 | #if 1 |
| 1318 | /* After the implementation of incremental loading of shared |
| 1319 | libraries, we don't want to access trampoline entries. This |
| 1320 | approach has a consequence of the necessity to bring the whole |
| 1321 | shared library at first, in order do anything with it (putting |
| 1322 | breakpoints, using malloc, etc). On the other side, this is |
| 1323 | consistient with gdb's behaviour on a SUN platform. */ |
| 1324 | |
| 1325 | /* Trying to prefer *real* function entry over its trampoline, |
| 1326 | by assigning `mst_unknown' type to trampoline entries fails. |
| 1327 | Gdb treats those entries as chars. FIXME. */ |
| 1328 | |
| 1329 | /* Recording this entry is necessary. Single stepping relies on |
| 1330 | this vector to get an idea about function address boundaries. */ |
| 1331 | |
| 1332 | prim_record_minimal_symbol_and_info |
| 1333 | ("<trampoline>", cs->c_value, mst_unknown, |
| 1334 | (char *)NULL, cs->c_secnum, objfile); |
| 1335 | #else |
| 1336 | |
| 1337 | /* record trampoline code entries as mst_unknown symbol. When we |
| 1338 | lookup mst symbols, we will choose mst_text over mst_unknown. */ |
| 1339 | |
| 1340 | RECORD_MINIMAL_SYMBOL (cs->c_name, cs->c_value, mst_unknown, |
| 1341 | symname_alloced, objfile); |
| 1342 | #endif |
| 1343 | continue; |
| 1344 | } |
| 1345 | break; |
| 1346 | |
| 1347 | default : /* all other XTY_XXXs */ |
| 1348 | break; |
| 1349 | } /* switch CSECT_SMTYP() */ } |
| 1350 | |
| 1351 | switch (cs->c_sclass) { |
| 1352 | |
| 1353 | case C_FILE: |
| 1354 | |
| 1355 | /* see if the last csect needs to be recorded. */ |
| 1356 | |
| 1357 | if (last_csect_name && !misc_func_recorded) { |
| 1358 | |
| 1359 | /* if no misc. function recorded in the last seen csect, enter |
| 1360 | it as a function. This will take care of functions like |
| 1361 | strcmp() compiled by xlc. */ |
| 1362 | |
| 1363 | int alloced = 0; |
| 1364 | RECORD_MINIMAL_SYMBOL (last_csect_name, last_csect_val, |
| 1365 | mst_text, alloced, last_csect_sec, objfile); |
| 1366 | } |
| 1367 | |
| 1368 | /* c_value field contains symnum of next .file entry in table |
| 1369 | or symnum of first global after last .file. */ |
| 1370 | |
| 1371 | next_file_symnum = cs->c_value; |
| 1372 | |
| 1373 | /* complete symbol table for last object file containing |
| 1374 | debugging information. */ |
| 1375 | |
| 1376 | /* Whether or not there was a csect in the previous file, we have to call |
| 1377 | `end_stabs' and `start_stabs' to reset type_vector, |
| 1378 | line_vector, etc. structures. */ |
| 1379 | |
| 1380 | complete_symtab (filestring, file_start_addr); |
| 1381 | cur_src_end_addr = file_end_addr; |
| 1382 | end_symtab (file_end_addr, 1, 0, objfile, textsec->target_index); |
| 1383 | end_stabs (); |
| 1384 | |
| 1385 | /* XCOFF, according to the AIX 3.2 documentation, puts the filename |
| 1386 | in cs->c_name. But xlc 1.3.0.2 has decided to do things the |
| 1387 | standard COFF way and put it in the auxent. We use the auxent if |
| 1388 | there is one, otherwise use the name. Simple enough. */ |
| 1389 | if (cs->c_naux > 0) |
| 1390 | filestring = coff_getfilename (&main_aux); |
| 1391 | else |
| 1392 | filestring = cs->c_name; |
| 1393 | |
| 1394 | start_stabs (); |
| 1395 | start_symtab (filestring, (char *)NULL, (CORE_ADDR)0); |
| 1396 | last_csect_name = 0; |
| 1397 | |
| 1398 | /* reset file start and end addresses. A compilation unit with no text |
| 1399 | (only data) should have zero file boundaries. */ |
| 1400 | file_start_addr = file_end_addr = 0; |
| 1401 | break; |
| 1402 | |
| 1403 | |
| 1404 | case C_FUN: |
| 1405 | fcn_stab_saved = *cs; |
| 1406 | break; |
| 1407 | |
| 1408 | |
| 1409 | case C_FCN: |
| 1410 | if (STREQ (cs->c_name, ".bf")) { |
| 1411 | |
| 1412 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1413 | &main_aux); |
| 1414 | |
| 1415 | within_function = 1; |
| 1416 | |
| 1417 | mark_first_line (fcn_line_offset, cs->c_symnum); |
| 1418 | |
| 1419 | new = push_context (0, fcn_start_addr); |
| 1420 | |
| 1421 | new->name = define_symbol |
| 1422 | (fcn_cs_saved.c_value, fcn_stab_saved.c_name, 0, 0, objfile); |
| 1423 | if (new->name != NULL) |
| 1424 | SYMBOL_SECTION (new->name) = cs->c_secnum; |
| 1425 | } |
| 1426 | else if (STREQ (cs->c_name, ".ef")) { |
| 1427 | |
| 1428 | bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 1429 | &main_aux); |
| 1430 | |
| 1431 | /* the value of .ef is the address of epilogue code; |
| 1432 | not useful for gdb */ |
| 1433 | /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno |
| 1434 | contains number of lines to '}' */ |
| 1435 | |
| 1436 | fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; |
| 1437 | new = pop_context (); |
| 1438 | if (context_stack_depth != 0) |
| 1439 | error ("invalid symbol data; .bf/.ef/.bb/.eb symbol mismatch, at symbol %d.", |
| 1440 | symnum); |
| 1441 | |
| 1442 | finish_block (new->name, &local_symbols, new->old_blocks, |
| 1443 | new->start_addr, |
| 1444 | fcn_cs_saved.c_value + |
| 1445 | fcn_aux_saved.x_sym.x_misc.x_fsize, objfile); |
| 1446 | within_function = 0; |
| 1447 | } |
| 1448 | break; |
| 1449 | |
| 1450 | case C_BSTAT : /* begin static block */ |
| 1451 | { |
| 1452 | struct internal_syment symbol; |
| 1453 | |
| 1454 | read_symbol (&symbol, cs->c_value); |
| 1455 | static_block_base = symbol.n_value; |
| 1456 | static_block_section = symbol.n_scnum; |
| 1457 | } |
| 1458 | break; |
| 1459 | |
| 1460 | case C_ESTAT : /* end of static block */ |
| 1461 | static_block_base = 0; |
| 1462 | static_block_section = -1; |
| 1463 | break; |
| 1464 | |
| 1465 | case C_ARG : /* These are not implemented. */ |
| 1466 | case C_REGPARM : |
| 1467 | case C_TPDEF : |
| 1468 | case C_STRTAG : |
| 1469 | case C_UNTAG : |
| 1470 | case C_ENTAG : |
| 1471 | printf_unfiltered ("ERROR: Unimplemented storage class: %d.\n", cs->c_sclass); |
| 1472 | break; |
| 1473 | |
| 1474 | case C_HIDEXT : /* ignore these.. */ |
| 1475 | case C_LABEL : |
| 1476 | case C_NULL : |
| 1477 | break; |
| 1478 | |
| 1479 | case C_BINCL : /* beginning of include file */ |
| 1480 | |
| 1481 | /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted |
| 1482 | order. Thus, when wee see them, we might not know enough info |
| 1483 | to process them. Thus, we'll be saving them into a table |
| 1484 | (inclTable) and postpone their processing. */ |
| 1485 | |
| 1486 | record_include_begin (cs); |
| 1487 | break; |
| 1488 | |
| 1489 | case C_EINCL : /* end of include file */ |
| 1490 | /* see the comment after case C_BINCL. */ |
| 1491 | record_include_end (cs); |
| 1492 | break; |
| 1493 | |
| 1494 | case C_BLOCK : |
| 1495 | if (STREQ (cs->c_name, ".bb")) { |
| 1496 | depth++; |
| 1497 | new = push_context (depth, cs->c_value); |
| 1498 | } |
| 1499 | else if (STREQ (cs->c_name, ".eb")) { |
| 1500 | new = pop_context (); |
| 1501 | if (depth != new->depth) |
| 1502 | error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.", |
| 1503 | symnum); |
| 1504 | |
| 1505 | depth--; |
| 1506 | if (local_symbols && context_stack_depth > 0) { |
| 1507 | /* Make a block for the local symbols within. */ |
| 1508 | finish_block (new->name, &local_symbols, new->old_blocks, |
| 1509 | new->start_addr, cs->c_value, objfile); |
| 1510 | } |
| 1511 | local_symbols = new->locals; |
| 1512 | } |
| 1513 | break; |
| 1514 | |
| 1515 | default : |
| 1516 | process_xcoff_symbol (cs, objfile); |
| 1517 | break; |
| 1518 | } |
| 1519 | |
| 1520 | } /* while */ |
| 1521 | |
| 1522 | if (last_source_file) |
| 1523 | { |
| 1524 | end_symtab (cur_src_end_addr, 1, 0, objfile, textsec->target_index); |
| 1525 | end_stabs (); |
| 1526 | } |
| 1527 | |
| 1528 | free (symtbl); |
| 1529 | current_objfile = NULL; |
| 1530 | |
| 1531 | /* Record the toc offset value of this symbol table into ldinfo structure. |
| 1532 | If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain |
| 1533 | this information would be file auxiliary header. */ |
| 1534 | |
| 1535 | #ifndef FAKING_RS6000 |
| 1536 | xcoff_add_toc_to_loadinfo (toc_offset); |
| 1537 | #endif |
| 1538 | } |
| 1539 | |
| 1540 | #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \ |
| 1541 | (SYMBOL2) = (struct symbol *) \ |
| 1542 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \ |
| 1543 | *(SYMBOL2) = *(SYMBOL1); |
| 1544 | |
| 1545 | |
| 1546 | #define SYMNAME_ALLOC(NAME, ALLOCED) \ |
| 1547 | (ALLOCED) ? (NAME) : obstack_copy0 (&objfile->symbol_obstack, (NAME), strlen (NAME)); |
| 1548 | |
| 1549 | |
| 1550 | /* process one xcoff symbol. */ |
| 1551 | |
| 1552 | static struct symbol * |
| 1553 | process_xcoff_symbol (cs, objfile) |
| 1554 | register struct coff_symbol *cs; |
| 1555 | struct objfile *objfile; |
| 1556 | { |
| 1557 | struct symbol onesymbol; |
| 1558 | register struct symbol *sym = &onesymbol; |
| 1559 | struct symbol *sym2 = NULL; |
| 1560 | struct type *ttype; |
| 1561 | char *name, *pp, *qq; |
| 1562 | int struct_and_type_combined; |
| 1563 | int nameless; |
| 1564 | |
| 1565 | name = cs->c_name; |
| 1566 | if (name[0] == '.') |
| 1567 | ++name; |
| 1568 | |
| 1569 | memset (sym, '\0', sizeof (struct symbol)); |
| 1570 | |
| 1571 | /* default assumptions */ |
| 1572 | SYMBOL_VALUE (sym) = cs->c_value; |
| 1573 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
| 1574 | SYMBOL_SECTION (sym) = cs->c_secnum; |
| 1575 | |
| 1576 | if (ISFCN (cs->c_type)) { |
| 1577 | |
| 1578 | /* At this point, we don't know the type of the function and assume it |
| 1579 | is int. This will be patched with the type from its stab entry later |
| 1580 | on in patch_block_stabs () */ |
| 1581 | |
| 1582 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); |
| 1583 | SYMBOL_TYPE (sym) = lookup_function_type (lookup_fundamental_type (objfile, FT_INTEGER)); |
| 1584 | |
| 1585 | SYMBOL_CLASS (sym) = LOC_BLOCK; |
| 1586 | SYMBOL_DUP (sym, sym2); |
| 1587 | |
| 1588 | if (cs->c_sclass == C_EXT) |
| 1589 | add_symbol_to_list (sym2, &global_symbols); |
| 1590 | else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT) |
| 1591 | add_symbol_to_list (sym2, &file_symbols); |
| 1592 | } |
| 1593 | |
| 1594 | else { |
| 1595 | |
| 1596 | /* in case we can't figure out the type, default is `int'. */ |
| 1597 | SYMBOL_TYPE (sym) = lookup_fundamental_type (objfile, FT_INTEGER); |
| 1598 | |
| 1599 | switch (cs->c_sclass) |
| 1600 | { |
| 1601 | #if 0 |
| 1602 | case C_FUN: |
| 1603 | if (fcn_cs_saved.c_sclass == C_EXT) |
| 1604 | add_stab_to_list (name, &global_stabs); |
| 1605 | else |
| 1606 | add_stab_to_list (name, &file_stabs); |
| 1607 | break; |
| 1608 | #endif |
| 1609 | |
| 1610 | case C_GSYM: |
| 1611 | add_stab_to_list (name, &global_stabs); |
| 1612 | break; |
| 1613 | |
| 1614 | case C_BCOMM: |
| 1615 | common_block_start (cs->c_name, objfile); |
| 1616 | break; |
| 1617 | |
| 1618 | case C_ECOMM: |
| 1619 | common_block_end (objfile); |
| 1620 | break; |
| 1621 | |
| 1622 | default: |
| 1623 | complain (&storclass_complaint, cs->c_sclass); |
| 1624 | /* FALLTHROUGH */ |
| 1625 | |
| 1626 | case C_DECL: |
| 1627 | case C_PSYM: |
| 1628 | case C_RPSYM: |
| 1629 | case C_ECOML: |
| 1630 | |
| 1631 | sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile); |
| 1632 | if (sym != NULL) |
| 1633 | { |
| 1634 | SYMBOL_SECTION (sym) = cs->c_secnum; |
| 1635 | } |
| 1636 | return sym; |
| 1637 | |
| 1638 | case C_STSYM: |
| 1639 | |
| 1640 | /* For xlc (not GCC), the 'V' symbol descriptor is used for all |
| 1641 | statics and we need to distinguish file-scope versus function-scope |
| 1642 | using within_function. We do this by changing the string we pass |
| 1643 | to define_symbol to use 'S' where we need to, which is not necessarily |
| 1644 | super-clean, but seems workable enough. */ |
| 1645 | |
| 1646 | if (*name == ':' || (pp = (char *) strchr(name, ':')) == NULL) |
| 1647 | return NULL; |
| 1648 | |
| 1649 | ++pp; |
| 1650 | if (*pp == 'V' && !within_function) |
| 1651 | *pp = 'S'; |
| 1652 | sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile); |
| 1653 | if (sym != NULL) |
| 1654 | { |
| 1655 | SYMBOL_VALUE (sym) += static_block_base; |
| 1656 | SYMBOL_SECTION (sym) = static_block_section; |
| 1657 | } |
| 1658 | return sym; |
| 1659 | |
| 1660 | case C_LSYM: |
| 1661 | sym = define_symbol (cs->c_value, cs->c_name, 0, N_LSYM, objfile); |
| 1662 | if (sym != NULL) |
| 1663 | { |
| 1664 | SYMBOL_SECTION (sym) = cs->c_secnum; |
| 1665 | } |
| 1666 | return sym; |
| 1667 | |
| 1668 | case C_AUTO: |
| 1669 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
| 1670 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); |
| 1671 | SYMBOL_SECTION (sym) = cs->c_secnum; |
| 1672 | SYMBOL_DUP (sym, sym2); |
| 1673 | add_symbol_to_list (sym2, &local_symbols); |
| 1674 | break; |
| 1675 | |
| 1676 | case C_EXT: |
| 1677 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 1678 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); |
| 1679 | SYMBOL_SECTION (sym) = cs->c_secnum; |
| 1680 | SYMBOL_DUP (sym, sym2); |
| 1681 | add_symbol_to_list (sym2, &global_symbols); |
| 1682 | break; |
| 1683 | |
| 1684 | case C_STAT: |
| 1685 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 1686 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); |
| 1687 | SYMBOL_SECTION (sym) = cs->c_secnum; |
| 1688 | SYMBOL_DUP (sym, sym2); |
| 1689 | add_symbol_to_list |
| 1690 | (sym2, within_function ? &local_symbols : &file_symbols); |
| 1691 | break; |
| 1692 | |
| 1693 | case C_REG: |
| 1694 | printf_unfiltered ("ERROR! C_REG is not fully implemented!\n"); |
| 1695 | SYMBOL_CLASS (sym) = LOC_REGISTER; |
| 1696 | SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); |
| 1697 | SYMBOL_SECTION (sym) = cs->c_secnum; |
| 1698 | SYMBOL_DUP (sym, sym2); |
| 1699 | add_symbol_to_list (sym2, &local_symbols); |
| 1700 | break; |
| 1701 | |
| 1702 | case C_RSYM: |
| 1703 | pp = (char*) strchr (name, ':'); |
| 1704 | if (pp) { |
| 1705 | sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile); |
| 1706 | if (sym != NULL) |
| 1707 | SYMBOL_SECTION (sym) = cs->c_secnum; |
| 1708 | return sym; |
| 1709 | } |
| 1710 | else { |
| 1711 | complain (&rsym_complaint, name); |
| 1712 | return NULL; |
| 1713 | } |
| 1714 | } |
| 1715 | } |
| 1716 | return sym2; |
| 1717 | } |
| 1718 | |
| 1719 | /* Set *SYMBOL to symbol number symno in symtbl. */ |
| 1720 | static void |
| 1721 | read_symbol (symbol, symno) |
| 1722 | struct internal_syment *symbol; |
| 1723 | int symno; |
| 1724 | { |
| 1725 | if (symno < 0 || symno >= symtbl_num_syms) |
| 1726 | { |
| 1727 | static struct complaint msg = |
| 1728 | {"Invalid symbol offset", 0, 0}; |
| 1729 | complain (&msg); |
| 1730 | symbol->n_value = 0; |
| 1731 | symbol->n_scnum = -1; |
| 1732 | return; |
| 1733 | } |
| 1734 | bfd_coff_swap_sym_in (symfile_bfd, symtbl + (symno*local_symesz), symbol); |
| 1735 | } |
| 1736 | |
| 1737 | /* Get value corresponding to symbol number symno in symtbl. */ |
| 1738 | |
| 1739 | static int |
| 1740 | read_symbol_nvalue (symno) |
| 1741 | int symno; |
| 1742 | { |
| 1743 | struct internal_syment symbol[1]; |
| 1744 | |
| 1745 | read_symbol (symbol, symno); |
| 1746 | return symbol->n_value; |
| 1747 | } |
| 1748 | |
| 1749 | |
| 1750 | /* Find the address of the function corresponding to symno, where |
| 1751 | symno is the symbol pointed to by the linetable. */ |
| 1752 | |
| 1753 | static int |
| 1754 | read_symbol_lineno (symno) |
| 1755 | int symno; |
| 1756 | { |
| 1757 | struct internal_syment symbol[1]; |
| 1758 | union internal_auxent main_aux[1]; |
| 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 | while (symno < symtbl_num_syms) { |
| 1773 | bfd_coff_swap_sym_in (symfile_bfd, |
| 1774 | symtbl + (symno*local_symesz), symbol); |
| 1775 | if (symbol->n_sclass == C_FCN && STREQ (symbol->n_name, ".bf")) |
| 1776 | goto gotit; |
| 1777 | symno += symbol->n_numaux+1; |
| 1778 | } |
| 1779 | |
| 1780 | complain (&bf_notfound_complaint); |
| 1781 | return 0; |
| 1782 | |
| 1783 | gotit: |
| 1784 | /* take aux entry and return its lineno */ |
| 1785 | symno++; |
| 1786 | bfd_coff_swap_aux_in (symfile_bfd, symtbl+(symno*local_symesz), |
| 1787 | symbol->n_type, symbol->n_sclass, main_aux); |
| 1788 | |
| 1789 | return main_aux->x_sym.x_misc.x_lnsz.x_lnno; |
| 1790 | } |
| 1791 | |
| 1792 | /* Support for line number handling */ |
| 1793 | |
| 1794 | /* This function is called for every section; it finds the outer limits |
| 1795 | * of the line table (minimum and maximum file offset) so that the |
| 1796 | * mainline code can read the whole thing for efficiency. |
| 1797 | */ |
| 1798 | static void |
| 1799 | find_linenos(abfd, asect, vpinfo) |
| 1800 | bfd *abfd; |
| 1801 | sec_ptr asect; |
| 1802 | PTR vpinfo; |
| 1803 | { |
| 1804 | struct coff_symfile_info *info; |
| 1805 | int size, count; |
| 1806 | file_ptr offset, maxoff; |
| 1807 | |
| 1808 | count = asect->lineno_count; |
| 1809 | |
| 1810 | if (!STREQ (asect->name, ".text") || count == 0) |
| 1811 | return; |
| 1812 | |
| 1813 | size = count * coff_data (symfile_bfd)->local_linesz; |
| 1814 | info = (struct coff_symfile_info *)vpinfo; |
| 1815 | offset = asect->line_filepos; |
| 1816 | maxoff = offset + size; |
| 1817 | |
| 1818 | if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) |
| 1819 | info->min_lineno_offset = offset; |
| 1820 | |
| 1821 | if (maxoff > info->max_lineno_offset) |
| 1822 | info->max_lineno_offset = maxoff; |
| 1823 | } |
| 1824 | |
| 1825 | |
| 1826 | /* Read in all the line numbers for fast lookups later. Leave them in |
| 1827 | external (unswapped) format in memory; we'll swap them as we enter |
| 1828 | them into GDB's data structures. */ |
| 1829 | |
| 1830 | static int |
| 1831 | init_lineno (abfd, offset, size) |
| 1832 | bfd *abfd; |
| 1833 | file_ptr offset; |
| 1834 | int size; |
| 1835 | { |
| 1836 | int val; |
| 1837 | |
| 1838 | free_linetab (); |
| 1839 | |
| 1840 | if (bfd_seek(abfd, offset, L_SET) < 0) |
| 1841 | return -1; |
| 1842 | |
| 1843 | linetab = (char *) xmalloc(size); |
| 1844 | |
| 1845 | val = bfd_read(linetab, 1, size, abfd); |
| 1846 | if (val != size) |
| 1847 | return -1; |
| 1848 | |
| 1849 | linetab_offset = offset; |
| 1850 | linetab_size = size; |
| 1851 | return 0; |
| 1852 | } |
| 1853 | |
| 1854 | static void |
| 1855 | free_linetab () |
| 1856 | { |
| 1857 | if (linetab) |
| 1858 | free (linetab); |
| 1859 | linetab = NULL; |
| 1860 | } |
| 1861 | \f |
| 1862 | /* dbx allows the text of a symbol name to be continued into the |
| 1863 | next symbol name! When such a continuation is encountered |
| 1864 | (a \ at the end of the text of a name) |
| 1865 | call this function to get the continuation. */ |
| 1866 | /* So far, I haven't seen this happenning xlc output. I doubt we'll need this |
| 1867 | for xcoff. */ |
| 1868 | |
| 1869 | #undef next_symbol_text |
| 1870 | #define next_symbol_text() \ |
| 1871 | printf_unfiltered ("Gdb Error: symbol names on multiple lines not implemented.\n") |
| 1872 | |
| 1873 | |
| 1874 | static void |
| 1875 | xcoff_new_init (objfile) |
| 1876 | struct objfile *objfile; |
| 1877 | { |
| 1878 | } |
| 1879 | |
| 1880 | |
| 1881 | /* xcoff_symfile_init() |
| 1882 | is the xcoff-specific initialization routine for reading symbols. |
| 1883 | It is passed an objfile which contains, among other things, |
| 1884 | the BFD for the file whose symbols are being read, and a slot for |
| 1885 | a pointer to "private data" which we fill with cookies and other |
| 1886 | treats for xcoff_symfile_read(). |
| 1887 | |
| 1888 | We will only be called if this is an XCOFF or XCOFF-like file. |
| 1889 | BFD handles figuring out the format of the file, and code in symfile.c |
| 1890 | uses BFD's determination to vector to us. |
| 1891 | |
| 1892 | The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ |
| 1893 | |
| 1894 | static void |
| 1895 | xcoff_symfile_init (objfile) |
| 1896 | struct objfile *objfile; |
| 1897 | { |
| 1898 | bfd *abfd = objfile->obfd; |
| 1899 | |
| 1900 | /* Allocate struct to keep track of the symfile */ |
| 1901 | objfile -> sym_private = xmmalloc (objfile -> md, |
| 1902 | sizeof (struct coff_symfile_info)); |
| 1903 | init_entry_point_info (objfile); |
| 1904 | } |
| 1905 | |
| 1906 | /* Perform any local cleanups required when we are done with a particular |
| 1907 | objfile. I.E, we are in the process of discarding all symbol information |
| 1908 | for an objfile, freeing up all memory held for it, and unlinking the |
| 1909 | objfile struct from the global list of known objfiles. */ |
| 1910 | |
| 1911 | static void |
| 1912 | xcoff_symfile_finish (objfile) |
| 1913 | struct objfile *objfile; |
| 1914 | { |
| 1915 | if (objfile -> sym_private != NULL) |
| 1916 | { |
| 1917 | mfree (objfile -> md, objfile -> sym_private); |
| 1918 | } |
| 1919 | |
| 1920 | /* Start with a fresh include table for the next objfile. */ |
| 1921 | |
| 1922 | if (inclTable) |
| 1923 | { |
| 1924 | free (inclTable); |
| 1925 | inclTable = NULL; |
| 1926 | } |
| 1927 | inclIndx = inclLength = inclDepth = 0; |
| 1928 | } |
| 1929 | |
| 1930 | |
| 1931 | static int |
| 1932 | init_stringtab(abfd, offset, objfile) |
| 1933 | bfd *abfd; |
| 1934 | file_ptr offset; |
| 1935 | struct objfile *objfile; |
| 1936 | { |
| 1937 | long length; |
| 1938 | int val; |
| 1939 | unsigned char lengthbuf[4]; |
| 1940 | |
| 1941 | if (bfd_seek(abfd, offset, L_SET) < 0) |
| 1942 | return -1; |
| 1943 | |
| 1944 | val = bfd_read((char *)lengthbuf, 1, sizeof lengthbuf, abfd); |
| 1945 | length = bfd_h_get_32(abfd, lengthbuf); |
| 1946 | |
| 1947 | /* If no string table is needed, then the file may end immediately |
| 1948 | after the symbols. Just return with `strtbl' set to null. */ |
| 1949 | |
| 1950 | if (val != sizeof length || length < sizeof length) |
| 1951 | return 0; |
| 1952 | |
| 1953 | /* Allocate string table from symbol_obstack. We will need this table |
| 1954 | as long as we have its symbol table around. */ |
| 1955 | |
| 1956 | strtbl = (char*) obstack_alloc (&objfile->symbol_obstack, length); |
| 1957 | if (strtbl == NULL) |
| 1958 | return -1; |
| 1959 | |
| 1960 | memcpy(strtbl, &length, sizeof length); |
| 1961 | if (length == sizeof length) |
| 1962 | return 0; |
| 1963 | |
| 1964 | val = bfd_read(strtbl + sizeof length, 1, length - sizeof length, abfd); |
| 1965 | |
| 1966 | if (val != length - sizeof length || strtbl[length - 1] != '\0') |
| 1967 | return -1; |
| 1968 | |
| 1969 | return 0; |
| 1970 | } |
| 1971 | |
| 1972 | static int |
| 1973 | init_debugsection(abfd) |
| 1974 | bfd *abfd; |
| 1975 | { |
| 1976 | register sec_ptr secp; |
| 1977 | bfd_size_type length; |
| 1978 | |
| 1979 | if (debugsec) { |
| 1980 | free(debugsec); |
| 1981 | debugsec = NULL; |
| 1982 | } |
| 1983 | |
| 1984 | secp = bfd_get_section_by_name(abfd, ".debug"); |
| 1985 | if (!secp) |
| 1986 | return 0; |
| 1987 | |
| 1988 | if (!(length = bfd_section_size(abfd, secp))) |
| 1989 | return 0; |
| 1990 | |
| 1991 | debugsec = (char *) xmalloc ((unsigned)length); |
| 1992 | if (debugsec == NULL) |
| 1993 | return -1; |
| 1994 | |
| 1995 | if (!bfd_get_section_contents(abfd, secp, debugsec, (file_ptr) 0, length)) { |
| 1996 | printf_unfiltered ("Can't read .debug section from symbol file\n"); |
| 1997 | return -1; |
| 1998 | } |
| 1999 | return 0; |
| 2000 | } |
| 2001 | |
| 2002 | static void |
| 2003 | free_debugsection() |
| 2004 | { |
| 2005 | if (debugsec) |
| 2006 | free(debugsec); |
| 2007 | debugsec = NULL; |
| 2008 | } |
| 2009 | |
| 2010 | |
| 2011 | /* xcoff version of symbol file read. */ |
| 2012 | |
| 2013 | static void |
| 2014 | xcoff_symfile_read (objfile, section_offset, mainline) |
| 2015 | struct objfile *objfile; |
| 2016 | struct section_offsets *section_offset; |
| 2017 | int mainline; |
| 2018 | { |
| 2019 | int num_symbols; /* # of symbols */ |
| 2020 | file_ptr symtab_offset; /* symbol table and */ |
| 2021 | file_ptr stringtab_offset; /* string table file offsets */ |
| 2022 | int val; |
| 2023 | bfd *abfd; |
| 2024 | struct coff_symfile_info *info; |
| 2025 | char *name; |
| 2026 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
| 2027 | |
| 2028 | info = (struct coff_symfile_info *) objfile -> sym_private; |
| 2029 | symfile_bfd = abfd = objfile->obfd; |
| 2030 | name = objfile->name; |
| 2031 | |
| 2032 | num_symbols = bfd_get_symcount (abfd); /* # of symbols */ |
| 2033 | symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */ |
| 2034 | stringtab_offset = symtab_offset + |
| 2035 | num_symbols * coff_data(abfd)->local_symesz; |
| 2036 | |
| 2037 | info->min_lineno_offset = 0; |
| 2038 | info->max_lineno_offset = 0; |
| 2039 | bfd_map_over_sections (abfd, find_linenos, info); |
| 2040 | |
| 2041 | /* FIXME! This stuff should move into symfile_init */ |
| 2042 | if (info->min_lineno_offset != 0 |
| 2043 | && info->max_lineno_offset > info->min_lineno_offset) { |
| 2044 | |
| 2045 | /* only read in the line # table if one exists */ |
| 2046 | make_cleanup (free_linetab, 0); |
| 2047 | val = init_lineno(abfd, info->min_lineno_offset, |
| 2048 | (int) (info->max_lineno_offset - info->min_lineno_offset)); |
| 2049 | |
| 2050 | if (val < 0) |
| 2051 | error("\"%s\": error reading line numbers\n", name); |
| 2052 | } |
| 2053 | |
| 2054 | if (num_symbols > 0) |
| 2055 | { |
| 2056 | val = init_stringtab(abfd, stringtab_offset, objfile); |
| 2057 | if (val < 0) { |
| 2058 | error ("\"%s\": can't get string table", name); |
| 2059 | } |
| 2060 | |
| 2061 | if (init_debugsection(abfd) < 0) { |
| 2062 | error ("Error reading .debug section of `%s'\n", name); |
| 2063 | } |
| 2064 | } |
| 2065 | |
| 2066 | /* Position to read the symbol table. Do not read it all at once. */ |
| 2067 | val = bfd_seek(abfd, symtab_offset, L_SET); |
| 2068 | if (val < 0) |
| 2069 | perror_with_name(name); |
| 2070 | |
| 2071 | if (bfd_tell(abfd) != symtab_offset) |
| 2072 | fatal("bfd? BFD!"); |
| 2073 | |
| 2074 | init_minimal_symbol_collection (); |
| 2075 | make_cleanup (discard_minimal_symbols, 0); |
| 2076 | |
| 2077 | #ifndef FAKING_RS6000 |
| 2078 | /* Initialize load info structure. */ |
| 2079 | if (mainline) |
| 2080 | xcoff_init_loadinfo (); |
| 2081 | #endif |
| 2082 | |
| 2083 | /* Now that the executable file is positioned at symbol table, |
| 2084 | process it and define symbols accordingly. */ |
| 2085 | |
| 2086 | read_xcoff_symtab(objfile, num_symbols); |
| 2087 | |
| 2088 | /* Free debug section. */ |
| 2089 | free_debugsection (); |
| 2090 | |
| 2091 | /* Sort symbols alphabetically within each block. */ |
| 2092 | { |
| 2093 | struct symtab *s; |
| 2094 | for (s = objfile -> symtabs; s != NULL; s = s -> next) |
| 2095 | { |
| 2096 | sort_symtab_syms (s); |
| 2097 | } |
| 2098 | } |
| 2099 | |
| 2100 | /* Install any minimal symbols that have been collected as the current |
| 2101 | minimal symbols for this objfile. */ |
| 2102 | |
| 2103 | install_minimal_symbols (objfile); |
| 2104 | |
| 2105 | do_cleanups (back_to); |
| 2106 | } |
| 2107 | |
| 2108 | /* XCOFF-specific parsing routine for section offsets. */ |
| 2109 | |
| 2110 | static int largest_section; |
| 2111 | |
| 2112 | static void |
| 2113 | note_one_section (abfd, asect, ptr) |
| 2114 | bfd *abfd; |
| 2115 | asection *asect; |
| 2116 | PTR ptr; |
| 2117 | { |
| 2118 | if (asect->target_index > largest_section) |
| 2119 | largest_section = asect->target_index; |
| 2120 | } |
| 2121 | |
| 2122 | static |
| 2123 | struct section_offsets * |
| 2124 | xcoff_symfile_offsets (objfile, addr) |
| 2125 | struct objfile *objfile; |
| 2126 | CORE_ADDR addr; |
| 2127 | { |
| 2128 | struct section_offsets *section_offsets; |
| 2129 | int i; |
| 2130 | |
| 2131 | largest_section = 0; |
| 2132 | bfd_map_over_sections (objfile->obfd, note_one_section, NULL); |
| 2133 | objfile->num_sections = largest_section + 1; |
| 2134 | section_offsets = (struct section_offsets *) |
| 2135 | obstack_alloc |
| 2136 | (&objfile -> psymbol_obstack, |
| 2137 | sizeof (struct section_offsets) |
| 2138 | + sizeof (section_offsets->offsets) * (objfile->num_sections)); |
| 2139 | |
| 2140 | /* syms_from_objfile kindly subtracts from addr the bfd_section_vma |
| 2141 | of the .text section. This strikes me as wrong--whether the |
| 2142 | offset to be applied to symbol reading is relative to the start |
| 2143 | address of the section depends on the symbol format. In any |
| 2144 | event, this whole "addr" concept is pretty broken (it doesn't |
| 2145 | handle any section but .text sensibly), so just ignore the addr |
| 2146 | parameter and use 0. That matches the fact that xcoff_symfile_read |
| 2147 | ignores the section_offsets). */ |
| 2148 | for (i = 0; i < objfile->num_sections; i++) |
| 2149 | ANOFFSET (section_offsets, i) = 0; |
| 2150 | |
| 2151 | return section_offsets; |
| 2152 | } |
| 2153 | |
| 2154 | /* Register our ability to parse symbols for xcoff BFD files. */ |
| 2155 | |
| 2156 | static struct sym_fns xcoff_sym_fns = |
| 2157 | { |
| 2158 | |
| 2159 | /* Because the bfd uses coff_flavour, we need to specially kludge |
| 2160 | the flavour. FIXME: coff and xcoff and fundamentally similar |
| 2161 | except for debug format, and we should see if we can merge this |
| 2162 | file with coffread.c. For example, the extra storage classes |
| 2163 | used for stabs could presumably be recognized in any COFF file. */ |
| 2164 | |
| 2165 | (enum bfd_flavour)-1, |
| 2166 | |
| 2167 | xcoff_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| 2168 | xcoff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| 2169 | xcoff_symfile_read, /* sym_read: read a symbol file into symtab */ |
| 2170 | xcoff_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| 2171 | xcoff_symfile_offsets, /* sym_offsets: xlate offsets ext->int form */ |
| 2172 | NULL /* next: pointer to next struct sym_fns */ |
| 2173 | }; |
| 2174 | |
| 2175 | void |
| 2176 | _initialize_xcoffread () |
| 2177 | { |
| 2178 | add_symtab_fns(&xcoff_sym_fns); |
| 2179 | |
| 2180 | /* Initialize symbol template later used for arguments. */ |
| 2181 | SYMBOL_NAME (&parmsym) = ""; |
| 2182 | SYMBOL_INIT_LANGUAGE_SPECIFIC (&parmsym, language_c); |
| 2183 | SYMBOL_NAMESPACE (&parmsym) = VAR_NAMESPACE; |
| 2184 | SYMBOL_CLASS (&parmsym) = LOC_ARG; |
| 2185 | /* Its other fields are zero, or are filled in later. */ |
| 2186 | } |