| 1 | /* DWARF 2 debugging format support for GDB. |
| 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
| 3 | 2004 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, |
| 7 | Inc. with support from Florida State University (under contract |
| 8 | with the Ada Joint Program Office), and Silicon Graphics, Inc. |
| 9 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., |
| 10 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 |
| 11 | support in dwarfread.c |
| 12 | |
| 13 | This file is part of GDB. |
| 14 | |
| 15 | This program is free software; you can redistribute it and/or modify |
| 16 | it under the terms of the GNU General Public License as published by |
| 17 | the Free Software Foundation; either version 2 of the License, or (at |
| 18 | your option) any later version. |
| 19 | |
| 20 | This program is distributed in the hope that it will be useful, but |
| 21 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 23 | General Public License for more details. |
| 24 | |
| 25 | You should have received a copy of the GNU General Public License |
| 26 | along with this program; if not, write to the Free Software |
| 27 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 28 | Boston, MA 02111-1307, USA. */ |
| 29 | |
| 30 | #include "defs.h" |
| 31 | #include "bfd.h" |
| 32 | #include "symtab.h" |
| 33 | #include "gdbtypes.h" |
| 34 | #include "objfiles.h" |
| 35 | #include "elf/dwarf2.h" |
| 36 | #include "buildsym.h" |
| 37 | #include "demangle.h" |
| 38 | #include "expression.h" |
| 39 | #include "filenames.h" /* for DOSish file names */ |
| 40 | #include "macrotab.h" |
| 41 | #include "language.h" |
| 42 | #include "complaints.h" |
| 43 | #include "bcache.h" |
| 44 | #include "dwarf2expr.h" |
| 45 | #include "dwarf2loc.h" |
| 46 | #include "cp-support.h" |
| 47 | |
| 48 | #include <fcntl.h> |
| 49 | #include "gdb_string.h" |
| 50 | #include "gdb_assert.h" |
| 51 | #include <sys/types.h> |
| 52 | |
| 53 | #ifndef DWARF2_REG_TO_REGNUM |
| 54 | #define DWARF2_REG_TO_REGNUM(REG) (REG) |
| 55 | #endif |
| 56 | |
| 57 | #if 0 |
| 58 | /* .debug_info header for a compilation unit |
| 59 | Because of alignment constraints, this structure has padding and cannot |
| 60 | be mapped directly onto the beginning of the .debug_info section. */ |
| 61 | typedef struct comp_unit_header |
| 62 | { |
| 63 | unsigned int length; /* length of the .debug_info |
| 64 | contribution */ |
| 65 | unsigned short version; /* version number -- 2 for DWARF |
| 66 | version 2 */ |
| 67 | unsigned int abbrev_offset; /* offset into .debug_abbrev section */ |
| 68 | unsigned char addr_size; /* byte size of an address -- 4 */ |
| 69 | } |
| 70 | _COMP_UNIT_HEADER; |
| 71 | #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11 |
| 72 | #endif |
| 73 | |
| 74 | /* .debug_pubnames header |
| 75 | Because of alignment constraints, this structure has padding and cannot |
| 76 | be mapped directly onto the beginning of the .debug_info section. */ |
| 77 | typedef struct pubnames_header |
| 78 | { |
| 79 | unsigned int length; /* length of the .debug_pubnames |
| 80 | contribution */ |
| 81 | unsigned char version; /* version number -- 2 for DWARF |
| 82 | version 2 */ |
| 83 | unsigned int info_offset; /* offset into .debug_info section */ |
| 84 | unsigned int info_size; /* byte size of .debug_info section |
| 85 | portion */ |
| 86 | } |
| 87 | _PUBNAMES_HEADER; |
| 88 | #define _ACTUAL_PUBNAMES_HEADER_SIZE 13 |
| 89 | |
| 90 | /* .debug_pubnames header |
| 91 | Because of alignment constraints, this structure has padding and cannot |
| 92 | be mapped directly onto the beginning of the .debug_info section. */ |
| 93 | typedef struct aranges_header |
| 94 | { |
| 95 | unsigned int length; /* byte len of the .debug_aranges |
| 96 | contribution */ |
| 97 | unsigned short version; /* version number -- 2 for DWARF |
| 98 | version 2 */ |
| 99 | unsigned int info_offset; /* offset into .debug_info section */ |
| 100 | unsigned char addr_size; /* byte size of an address */ |
| 101 | unsigned char seg_size; /* byte size of segment descriptor */ |
| 102 | } |
| 103 | _ARANGES_HEADER; |
| 104 | #define _ACTUAL_ARANGES_HEADER_SIZE 12 |
| 105 | |
| 106 | /* .debug_line statement program prologue |
| 107 | Because of alignment constraints, this structure has padding and cannot |
| 108 | be mapped directly onto the beginning of the .debug_info section. */ |
| 109 | typedef struct statement_prologue |
| 110 | { |
| 111 | unsigned int total_length; /* byte length of the statement |
| 112 | information */ |
| 113 | unsigned short version; /* version number -- 2 for DWARF |
| 114 | version 2 */ |
| 115 | unsigned int prologue_length; /* # bytes between prologue & |
| 116 | stmt program */ |
| 117 | unsigned char minimum_instruction_length; /* byte size of |
| 118 | smallest instr */ |
| 119 | unsigned char default_is_stmt; /* initial value of is_stmt |
| 120 | register */ |
| 121 | char line_base; |
| 122 | unsigned char line_range; |
| 123 | unsigned char opcode_base; /* number assigned to first special |
| 124 | opcode */ |
| 125 | unsigned char *standard_opcode_lengths; |
| 126 | } |
| 127 | _STATEMENT_PROLOGUE; |
| 128 | |
| 129 | /* offsets and sizes of debugging sections */ |
| 130 | |
| 131 | static unsigned int dwarf_info_size; |
| 132 | static unsigned int dwarf_abbrev_size; |
| 133 | static unsigned int dwarf_line_size; |
| 134 | static unsigned int dwarf_pubnames_size; |
| 135 | static unsigned int dwarf_aranges_size; |
| 136 | static unsigned int dwarf_loc_size; |
| 137 | static unsigned int dwarf_macinfo_size; |
| 138 | static unsigned int dwarf_str_size; |
| 139 | static unsigned int dwarf_ranges_size; |
| 140 | unsigned int dwarf_frame_size; |
| 141 | unsigned int dwarf_eh_frame_size; |
| 142 | |
| 143 | static asection *dwarf_info_section; |
| 144 | static asection *dwarf_abbrev_section; |
| 145 | static asection *dwarf_line_section; |
| 146 | static asection *dwarf_pubnames_section; |
| 147 | static asection *dwarf_aranges_section; |
| 148 | static asection *dwarf_loc_section; |
| 149 | static asection *dwarf_macinfo_section; |
| 150 | static asection *dwarf_str_section; |
| 151 | static asection *dwarf_ranges_section; |
| 152 | asection *dwarf_frame_section; |
| 153 | asection *dwarf_eh_frame_section; |
| 154 | |
| 155 | /* names of the debugging sections */ |
| 156 | |
| 157 | #define INFO_SECTION ".debug_info" |
| 158 | #define ABBREV_SECTION ".debug_abbrev" |
| 159 | #define LINE_SECTION ".debug_line" |
| 160 | #define PUBNAMES_SECTION ".debug_pubnames" |
| 161 | #define ARANGES_SECTION ".debug_aranges" |
| 162 | #define LOC_SECTION ".debug_loc" |
| 163 | #define MACINFO_SECTION ".debug_macinfo" |
| 164 | #define STR_SECTION ".debug_str" |
| 165 | #define RANGES_SECTION ".debug_ranges" |
| 166 | #define FRAME_SECTION ".debug_frame" |
| 167 | #define EH_FRAME_SECTION ".eh_frame" |
| 168 | |
| 169 | /* local data types */ |
| 170 | |
| 171 | /* We hold several abbreviation tables in memory at the same time. */ |
| 172 | #ifndef ABBREV_HASH_SIZE |
| 173 | #define ABBREV_HASH_SIZE 121 |
| 174 | #endif |
| 175 | |
| 176 | /* The data in a compilation unit header, after target2host |
| 177 | translation, looks like this. */ |
| 178 | struct comp_unit_head |
| 179 | { |
| 180 | unsigned long length; |
| 181 | short version; |
| 182 | unsigned int abbrev_offset; |
| 183 | unsigned char addr_size; |
| 184 | unsigned char signed_addr_p; |
| 185 | unsigned int offset_size; /* size of file offsets; either 4 or 8 */ |
| 186 | unsigned int initial_length_size; /* size of the length field; either |
| 187 | 4 or 12 */ |
| 188 | |
| 189 | /* Offset to the first byte of this compilation unit header in the |
| 190 | * .debug_info section, for resolving relative reference dies. */ |
| 191 | |
| 192 | unsigned int offset; |
| 193 | |
| 194 | /* Pointer to this compilation unit header in the .debug_info |
| 195 | * section */ |
| 196 | |
| 197 | char *cu_head_ptr; |
| 198 | |
| 199 | /* Pointer to the first die of this compilatio unit. This will |
| 200 | * be the first byte following the compilation unit header. */ |
| 201 | |
| 202 | char *first_die_ptr; |
| 203 | |
| 204 | /* Pointer to the next compilation unit header in the program. */ |
| 205 | |
| 206 | struct comp_unit_head *next; |
| 207 | |
| 208 | /* DWARF abbreviation table associated with this compilation unit */ |
| 209 | |
| 210 | struct abbrev_info *dwarf2_abbrevs[ABBREV_HASH_SIZE]; |
| 211 | |
| 212 | /* Base address of this compilation unit. */ |
| 213 | |
| 214 | CORE_ADDR base_address; |
| 215 | |
| 216 | /* Non-zero if base_address has been set. */ |
| 217 | |
| 218 | int base_known; |
| 219 | }; |
| 220 | |
| 221 | /* Internal state when decoding a particular compilation unit. */ |
| 222 | struct dwarf2_cu |
| 223 | { |
| 224 | /* The objfile containing this compilation unit. */ |
| 225 | struct objfile *objfile; |
| 226 | |
| 227 | /* The header of the compilation unit. |
| 228 | |
| 229 | FIXME drow/2003-11-10: Some of the things from the comp_unit_head |
| 230 | should be moved to the dwarf2_cu structure; for instance the abbrevs |
| 231 | hash table. */ |
| 232 | struct comp_unit_head header; |
| 233 | |
| 234 | struct function_range *first_fn, *last_fn, *cached_fn; |
| 235 | |
| 236 | /* The language we are debugging. */ |
| 237 | enum language language; |
| 238 | const struct language_defn *language_defn; |
| 239 | |
| 240 | /* The generic symbol table building routines have separate lists for |
| 241 | file scope symbols and all all other scopes (local scopes). So |
| 242 | we need to select the right one to pass to add_symbol_to_list(). |
| 243 | We do it by keeping a pointer to the correct list in list_in_scope. |
| 244 | |
| 245 | FIXME: The original dwarf code just treated the file scope as the |
| 246 | first local scope, and all other local scopes as nested local |
| 247 | scopes, and worked fine. Check to see if we really need to |
| 248 | distinguish these in buildsym.c. */ |
| 249 | struct pending **list_in_scope; |
| 250 | |
| 251 | /* Maintain an array of referenced fundamental types for the current |
| 252 | compilation unit being read. For DWARF version 1, we have to construct |
| 253 | the fundamental types on the fly, since no information about the |
| 254 | fundamental types is supplied. Each such fundamental type is created by |
| 255 | calling a language dependent routine to create the type, and then a |
| 256 | pointer to that type is then placed in the array at the index specified |
| 257 | by it's FT_<TYPENAME> value. The array has a fixed size set by the |
| 258 | FT_NUM_MEMBERS compile time constant, which is the number of predefined |
| 259 | fundamental types gdb knows how to construct. */ |
| 260 | struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ |
| 261 | }; |
| 262 | |
| 263 | /* The line number information for a compilation unit (found in the |
| 264 | .debug_line section) begins with a "statement program header", |
| 265 | which contains the following information. */ |
| 266 | struct line_header |
| 267 | { |
| 268 | unsigned int total_length; |
| 269 | unsigned short version; |
| 270 | unsigned int header_length; |
| 271 | unsigned char minimum_instruction_length; |
| 272 | unsigned char default_is_stmt; |
| 273 | int line_base; |
| 274 | unsigned char line_range; |
| 275 | unsigned char opcode_base; |
| 276 | |
| 277 | /* standard_opcode_lengths[i] is the number of operands for the |
| 278 | standard opcode whose value is i. This means that |
| 279 | standard_opcode_lengths[0] is unused, and the last meaningful |
| 280 | element is standard_opcode_lengths[opcode_base - 1]. */ |
| 281 | unsigned char *standard_opcode_lengths; |
| 282 | |
| 283 | /* The include_directories table. NOTE! These strings are not |
| 284 | allocated with xmalloc; instead, they are pointers into |
| 285 | debug_line_buffer. If you try to free them, `free' will get |
| 286 | indigestion. */ |
| 287 | unsigned int num_include_dirs, include_dirs_size; |
| 288 | char **include_dirs; |
| 289 | |
| 290 | /* The file_names table. NOTE! These strings are not allocated |
| 291 | with xmalloc; instead, they are pointers into debug_line_buffer. |
| 292 | Don't try to free them directly. */ |
| 293 | unsigned int num_file_names, file_names_size; |
| 294 | struct file_entry |
| 295 | { |
| 296 | char *name; |
| 297 | unsigned int dir_index; |
| 298 | unsigned int mod_time; |
| 299 | unsigned int length; |
| 300 | } *file_names; |
| 301 | |
| 302 | /* The start and end of the statement program following this |
| 303 | header. These point into dwarf_line_buffer. */ |
| 304 | char *statement_program_start, *statement_program_end; |
| 305 | }; |
| 306 | |
| 307 | /* When we construct a partial symbol table entry we only |
| 308 | need this much information. */ |
| 309 | struct partial_die_info |
| 310 | { |
| 311 | enum dwarf_tag tag; |
| 312 | unsigned char has_children; |
| 313 | unsigned char is_external; |
| 314 | unsigned char is_declaration; |
| 315 | unsigned char has_type; |
| 316 | unsigned int offset; |
| 317 | unsigned int abbrev; |
| 318 | char *name; |
| 319 | int has_pc_info; |
| 320 | CORE_ADDR lowpc; |
| 321 | CORE_ADDR highpc; |
| 322 | struct dwarf_block *locdesc; |
| 323 | unsigned int language; |
| 324 | char *sibling; |
| 325 | }; |
| 326 | |
| 327 | /* This data structure holds the information of an abbrev. */ |
| 328 | struct abbrev_info |
| 329 | { |
| 330 | unsigned int number; /* number identifying abbrev */ |
| 331 | enum dwarf_tag tag; /* dwarf tag */ |
| 332 | int has_children; /* boolean */ |
| 333 | unsigned int num_attrs; /* number of attributes */ |
| 334 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
| 335 | struct abbrev_info *next; /* next in chain */ |
| 336 | }; |
| 337 | |
| 338 | struct attr_abbrev |
| 339 | { |
| 340 | enum dwarf_attribute name; |
| 341 | enum dwarf_form form; |
| 342 | }; |
| 343 | |
| 344 | /* This data structure holds a complete die structure. */ |
| 345 | struct die_info |
| 346 | { |
| 347 | enum dwarf_tag tag; /* Tag indicating type of die */ |
| 348 | unsigned int abbrev; /* Abbrev number */ |
| 349 | unsigned int offset; /* Offset in .debug_info section */ |
| 350 | unsigned int num_attrs; /* Number of attributes */ |
| 351 | struct attribute *attrs; /* An array of attributes */ |
| 352 | struct die_info *next_ref; /* Next die in ref hash table */ |
| 353 | |
| 354 | /* The dies in a compilation unit form an n-ary tree. PARENT |
| 355 | points to this die's parent; CHILD points to the first child of |
| 356 | this node; and all the children of a given node are chained |
| 357 | together via their SIBLING fields, terminated by a die whose |
| 358 | tag is zero. */ |
| 359 | struct die_info *child; /* Its first child, if any. */ |
| 360 | struct die_info *sibling; /* Its next sibling, if any. */ |
| 361 | struct die_info *parent; /* Its parent, if any. */ |
| 362 | |
| 363 | struct type *type; /* Cached type information */ |
| 364 | }; |
| 365 | |
| 366 | /* Attributes have a name and a value */ |
| 367 | struct attribute |
| 368 | { |
| 369 | enum dwarf_attribute name; |
| 370 | enum dwarf_form form; |
| 371 | union |
| 372 | { |
| 373 | char *str; |
| 374 | struct dwarf_block *blk; |
| 375 | unsigned long unsnd; |
| 376 | long int snd; |
| 377 | CORE_ADDR addr; |
| 378 | } |
| 379 | u; |
| 380 | }; |
| 381 | |
| 382 | struct function_range |
| 383 | { |
| 384 | const char *name; |
| 385 | CORE_ADDR lowpc, highpc; |
| 386 | int seen_line; |
| 387 | struct function_range *next; |
| 388 | }; |
| 389 | |
| 390 | /* Get at parts of an attribute structure */ |
| 391 | |
| 392 | #define DW_STRING(attr) ((attr)->u.str) |
| 393 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
| 394 | #define DW_BLOCK(attr) ((attr)->u.blk) |
| 395 | #define DW_SND(attr) ((attr)->u.snd) |
| 396 | #define DW_ADDR(attr) ((attr)->u.addr) |
| 397 | |
| 398 | /* Blocks are a bunch of untyped bytes. */ |
| 399 | struct dwarf_block |
| 400 | { |
| 401 | unsigned int size; |
| 402 | char *data; |
| 403 | }; |
| 404 | |
| 405 | #ifndef ATTR_ALLOC_CHUNK |
| 406 | #define ATTR_ALLOC_CHUNK 4 |
| 407 | #endif |
| 408 | |
| 409 | /* A hash table of die offsets for following references. */ |
| 410 | #ifndef REF_HASH_SIZE |
| 411 | #define REF_HASH_SIZE 1021 |
| 412 | #endif |
| 413 | |
| 414 | static struct die_info *die_ref_table[REF_HASH_SIZE]; |
| 415 | |
| 416 | /* Obstack for allocating temporary storage used during symbol reading. */ |
| 417 | static struct obstack dwarf2_tmp_obstack; |
| 418 | |
| 419 | /* Allocate fields for structs, unions and enums in this size. */ |
| 420 | #ifndef DW_FIELD_ALLOC_CHUNK |
| 421 | #define DW_FIELD_ALLOC_CHUNK 4 |
| 422 | #endif |
| 423 | |
| 424 | /* Actually data from the sections. */ |
| 425 | static char *dwarf_info_buffer; |
| 426 | static char *dwarf_abbrev_buffer; |
| 427 | static char *dwarf_line_buffer; |
| 428 | static char *dwarf_str_buffer; |
| 429 | static char *dwarf_macinfo_buffer; |
| 430 | static char *dwarf_ranges_buffer; |
| 431 | static char *dwarf_loc_buffer; |
| 432 | |
| 433 | /* A zeroed version of a partial die for initialization purposes. */ |
| 434 | static struct partial_die_info zeroed_partial_die; |
| 435 | |
| 436 | /* FIXME: decode_locdesc sets these variables to describe the location |
| 437 | to the caller. These ought to be a structure or something. If |
| 438 | none of the flags are set, the object lives at the address returned |
| 439 | by decode_locdesc. */ |
| 440 | |
| 441 | static int isreg; /* Object lives in register. |
| 442 | decode_locdesc's return value is |
| 443 | the register number. */ |
| 444 | |
| 445 | /* We put a pointer to this structure in the read_symtab_private field |
| 446 | of the psymtab. |
| 447 | The complete dwarf information for an objfile is kept in the |
| 448 | objfile_obstack, so that absolute die references can be handled. |
| 449 | Most of the information in this structure is related to an entire |
| 450 | object file and could be passed via the sym_private field of the objfile. |
| 451 | It is however conceivable that dwarf2 might not be the only type |
| 452 | of symbols read from an object file. */ |
| 453 | |
| 454 | struct dwarf2_pinfo |
| 455 | { |
| 456 | /* Pointer to start of dwarf info buffer for the objfile. */ |
| 457 | |
| 458 | char *dwarf_info_buffer; |
| 459 | |
| 460 | /* Offset in dwarf_info_buffer for this compilation unit. */ |
| 461 | |
| 462 | unsigned long dwarf_info_offset; |
| 463 | |
| 464 | /* Pointer to start of dwarf abbreviation buffer for the objfile. */ |
| 465 | |
| 466 | char *dwarf_abbrev_buffer; |
| 467 | |
| 468 | /* Size of dwarf abbreviation section for the objfile. */ |
| 469 | |
| 470 | unsigned int dwarf_abbrev_size; |
| 471 | |
| 472 | /* Pointer to start of dwarf line buffer for the objfile. */ |
| 473 | |
| 474 | char *dwarf_line_buffer; |
| 475 | |
| 476 | /* Size of dwarf_line_buffer, in bytes. */ |
| 477 | |
| 478 | unsigned int dwarf_line_size; |
| 479 | |
| 480 | /* Pointer to start of dwarf string buffer for the objfile. */ |
| 481 | |
| 482 | char *dwarf_str_buffer; |
| 483 | |
| 484 | /* Size of dwarf string section for the objfile. */ |
| 485 | |
| 486 | unsigned int dwarf_str_size; |
| 487 | |
| 488 | /* Pointer to start of dwarf macro buffer for the objfile. */ |
| 489 | |
| 490 | char *dwarf_macinfo_buffer; |
| 491 | |
| 492 | /* Size of dwarf macinfo section for the objfile. */ |
| 493 | |
| 494 | unsigned int dwarf_macinfo_size; |
| 495 | |
| 496 | /* Pointer to start of dwarf ranges buffer for the objfile. */ |
| 497 | |
| 498 | char *dwarf_ranges_buffer; |
| 499 | |
| 500 | /* Size of dwarf ranges buffer for the objfile. */ |
| 501 | |
| 502 | unsigned int dwarf_ranges_size; |
| 503 | |
| 504 | /* Pointer to start of dwarf locations buffer for the objfile. */ |
| 505 | |
| 506 | char *dwarf_loc_buffer; |
| 507 | |
| 508 | /* Size of dwarf locations buffer for the objfile. */ |
| 509 | |
| 510 | unsigned int dwarf_loc_size; |
| 511 | }; |
| 512 | |
| 513 | #define PST_PRIVATE(p) ((struct dwarf2_pinfo *)(p)->read_symtab_private) |
| 514 | #define DWARF_INFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_info_buffer) |
| 515 | #define DWARF_INFO_OFFSET(p) (PST_PRIVATE(p)->dwarf_info_offset) |
| 516 | #define DWARF_ABBREV_BUFFER(p) (PST_PRIVATE(p)->dwarf_abbrev_buffer) |
| 517 | #define DWARF_ABBREV_SIZE(p) (PST_PRIVATE(p)->dwarf_abbrev_size) |
| 518 | #define DWARF_LINE_BUFFER(p) (PST_PRIVATE(p)->dwarf_line_buffer) |
| 519 | #define DWARF_LINE_SIZE(p) (PST_PRIVATE(p)->dwarf_line_size) |
| 520 | #define DWARF_STR_BUFFER(p) (PST_PRIVATE(p)->dwarf_str_buffer) |
| 521 | #define DWARF_STR_SIZE(p) (PST_PRIVATE(p)->dwarf_str_size) |
| 522 | #define DWARF_MACINFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_macinfo_buffer) |
| 523 | #define DWARF_MACINFO_SIZE(p) (PST_PRIVATE(p)->dwarf_macinfo_size) |
| 524 | #define DWARF_RANGES_BUFFER(p) (PST_PRIVATE(p)->dwarf_ranges_buffer) |
| 525 | #define DWARF_RANGES_SIZE(p) (PST_PRIVATE(p)->dwarf_ranges_size) |
| 526 | #define DWARF_LOC_BUFFER(p) (PST_PRIVATE(p)->dwarf_loc_buffer) |
| 527 | #define DWARF_LOC_SIZE(p) (PST_PRIVATE(p)->dwarf_loc_size) |
| 528 | |
| 529 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
| 530 | but this would require a corresponding change in unpack_field_as_long |
| 531 | and friends. */ |
| 532 | static int bits_per_byte = 8; |
| 533 | |
| 534 | /* The routines that read and process dies for a C struct or C++ class |
| 535 | pass lists of data member fields and lists of member function fields |
| 536 | in an instance of a field_info structure, as defined below. */ |
| 537 | struct field_info |
| 538 | { |
| 539 | /* List of data member and baseclasses fields. */ |
| 540 | struct nextfield |
| 541 | { |
| 542 | struct nextfield *next; |
| 543 | int accessibility; |
| 544 | int virtuality; |
| 545 | struct field field; |
| 546 | } |
| 547 | *fields; |
| 548 | |
| 549 | /* Number of fields. */ |
| 550 | int nfields; |
| 551 | |
| 552 | /* Number of baseclasses. */ |
| 553 | int nbaseclasses; |
| 554 | |
| 555 | /* Set if the accesibility of one of the fields is not public. */ |
| 556 | int non_public_fields; |
| 557 | |
| 558 | /* Member function fields array, entries are allocated in the order they |
| 559 | are encountered in the object file. */ |
| 560 | struct nextfnfield |
| 561 | { |
| 562 | struct nextfnfield *next; |
| 563 | struct fn_field fnfield; |
| 564 | } |
| 565 | *fnfields; |
| 566 | |
| 567 | /* Member function fieldlist array, contains name of possibly overloaded |
| 568 | member function, number of overloaded member functions and a pointer |
| 569 | to the head of the member function field chain. */ |
| 570 | struct fnfieldlist |
| 571 | { |
| 572 | char *name; |
| 573 | int length; |
| 574 | struct nextfnfield *head; |
| 575 | } |
| 576 | *fnfieldlists; |
| 577 | |
| 578 | /* Number of entries in the fnfieldlists array. */ |
| 579 | int nfnfields; |
| 580 | }; |
| 581 | |
| 582 | /* Various complaints about symbol reading that don't abort the process */ |
| 583 | |
| 584 | static void |
| 585 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) |
| 586 | { |
| 587 | complaint (&symfile_complaints, |
| 588 | "statement list doesn't fit in .debug_line section"); |
| 589 | } |
| 590 | |
| 591 | static void |
| 592 | dwarf2_complex_location_expr_complaint (void) |
| 593 | { |
| 594 | complaint (&symfile_complaints, "location expression too complex"); |
| 595 | } |
| 596 | |
| 597 | static void |
| 598 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, |
| 599 | int arg3) |
| 600 | { |
| 601 | complaint (&symfile_complaints, |
| 602 | "const value length mismatch for '%s', got %d, expected %d", arg1, |
| 603 | arg2, arg3); |
| 604 | } |
| 605 | |
| 606 | static void |
| 607 | dwarf2_macros_too_long_complaint (void) |
| 608 | { |
| 609 | complaint (&symfile_complaints, |
| 610 | "macro info runs off end of `.debug_macinfo' section"); |
| 611 | } |
| 612 | |
| 613 | static void |
| 614 | dwarf2_macro_malformed_definition_complaint (const char *arg1) |
| 615 | { |
| 616 | complaint (&symfile_complaints, |
| 617 | "macro debug info contains a malformed macro definition:\n`%s'", |
| 618 | arg1); |
| 619 | } |
| 620 | |
| 621 | static void |
| 622 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) |
| 623 | { |
| 624 | complaint (&symfile_complaints, |
| 625 | "invalid attribute class or form for '%s' in '%s'", arg1, arg2); |
| 626 | } |
| 627 | |
| 628 | /* local function prototypes */ |
| 629 | |
| 630 | static void dwarf2_locate_sections (bfd *, asection *, void *); |
| 631 | |
| 632 | #if 0 |
| 633 | static void dwarf2_build_psymtabs_easy (struct objfile *, int); |
| 634 | #endif |
| 635 | |
| 636 | static void dwarf2_build_psymtabs_hard (struct objfile *, int); |
| 637 | |
| 638 | static char *scan_partial_symbols (char *, CORE_ADDR *, CORE_ADDR *, |
| 639 | struct dwarf2_cu *, |
| 640 | const char *namespace); |
| 641 | |
| 642 | static void add_partial_symbol (struct partial_die_info *, struct dwarf2_cu *, |
| 643 | const char *namespace); |
| 644 | |
| 645 | static int pdi_needs_namespace (enum dwarf_tag tag, const char *namespace); |
| 646 | |
| 647 | static char *add_partial_namespace (struct partial_die_info *pdi, |
| 648 | char *info_ptr, |
| 649 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 650 | struct dwarf2_cu *cu, |
| 651 | const char *namespace); |
| 652 | |
| 653 | static char *add_partial_structure (struct partial_die_info *struct_pdi, |
| 654 | char *info_ptr, |
| 655 | struct dwarf2_cu *cu, |
| 656 | const char *namespace); |
| 657 | |
| 658 | static char *add_partial_enumeration (struct partial_die_info *enum_pdi, |
| 659 | char *info_ptr, |
| 660 | struct dwarf2_cu *cu, |
| 661 | const char *namespace); |
| 662 | |
| 663 | static char *locate_pdi_sibling (struct partial_die_info *orig_pdi, |
| 664 | char *info_ptr, |
| 665 | bfd *abfd, |
| 666 | struct dwarf2_cu *cu); |
| 667 | |
| 668 | static void dwarf2_psymtab_to_symtab (struct partial_symtab *); |
| 669 | |
| 670 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
| 671 | |
| 672 | char *dwarf2_read_section (struct objfile *, asection *); |
| 673 | |
| 674 | static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu); |
| 675 | |
| 676 | static void dwarf2_empty_abbrev_table (void *); |
| 677 | |
| 678 | static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int, |
| 679 | struct dwarf2_cu *); |
| 680 | |
| 681 | static char *read_partial_die (struct partial_die_info *, |
| 682 | bfd *, char *, struct dwarf2_cu *); |
| 683 | |
| 684 | static char *read_full_die (struct die_info **, bfd *, char *, |
| 685 | struct dwarf2_cu *, int *); |
| 686 | |
| 687 | static char *read_attribute (struct attribute *, struct attr_abbrev *, |
| 688 | bfd *, char *, struct dwarf2_cu *); |
| 689 | |
| 690 | static char *read_attribute_value (struct attribute *, unsigned, |
| 691 | bfd *, char *, struct dwarf2_cu *); |
| 692 | |
| 693 | static unsigned int read_1_byte (bfd *, char *); |
| 694 | |
| 695 | static int read_1_signed_byte (bfd *, char *); |
| 696 | |
| 697 | static unsigned int read_2_bytes (bfd *, char *); |
| 698 | |
| 699 | static unsigned int read_4_bytes (bfd *, char *); |
| 700 | |
| 701 | static unsigned long read_8_bytes (bfd *, char *); |
| 702 | |
| 703 | static CORE_ADDR read_address (bfd *, char *ptr, struct dwarf2_cu *, |
| 704 | int *bytes_read); |
| 705 | |
| 706 | static LONGEST read_initial_length (bfd *, char *, |
| 707 | struct comp_unit_head *, int *bytes_read); |
| 708 | |
| 709 | static LONGEST read_offset (bfd *, char *, const struct comp_unit_head *, |
| 710 | int *bytes_read); |
| 711 | |
| 712 | static char *read_n_bytes (bfd *, char *, unsigned int); |
| 713 | |
| 714 | static char *read_string (bfd *, char *, unsigned int *); |
| 715 | |
| 716 | static char *read_indirect_string (bfd *, char *, const struct comp_unit_head *, |
| 717 | unsigned int *); |
| 718 | |
| 719 | static unsigned long read_unsigned_leb128 (bfd *, char *, unsigned int *); |
| 720 | |
| 721 | static long read_signed_leb128 (bfd *, char *, unsigned int *); |
| 722 | |
| 723 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
| 724 | |
| 725 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
| 726 | struct dwarf2_cu *); |
| 727 | |
| 728 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
| 729 | |
| 730 | static struct die_info *die_specification (struct die_info *die, |
| 731 | struct dwarf2_cu *); |
| 732 | |
| 733 | static void free_line_header (struct line_header *lh); |
| 734 | |
| 735 | static struct line_header *(dwarf_decode_line_header |
| 736 | (unsigned int offset, |
| 737 | bfd *abfd, struct dwarf2_cu *cu)); |
| 738 | |
| 739 | static void dwarf_decode_lines (struct line_header *, char *, bfd *, |
| 740 | struct dwarf2_cu *); |
| 741 | |
| 742 | static void dwarf2_start_subfile (char *, char *); |
| 743 | |
| 744 | static struct symbol *new_symbol (struct die_info *, struct type *, |
| 745 | struct dwarf2_cu *); |
| 746 | |
| 747 | static void dwarf2_const_value (struct attribute *, struct symbol *, |
| 748 | struct dwarf2_cu *); |
| 749 | |
| 750 | static void dwarf2_const_value_data (struct attribute *attr, |
| 751 | struct symbol *sym, |
| 752 | int bits); |
| 753 | |
| 754 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
| 755 | |
| 756 | static struct type *die_containing_type (struct die_info *, |
| 757 | struct dwarf2_cu *); |
| 758 | |
| 759 | #if 0 |
| 760 | static struct type *type_at_offset (unsigned int, struct objfile *); |
| 761 | #endif |
| 762 | |
| 763 | static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *); |
| 764 | |
| 765 | static void read_type_die (struct die_info *, struct dwarf2_cu *); |
| 766 | |
| 767 | static char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
| 768 | |
| 769 | static char *determine_prefix_aux (struct die_info *die, struct dwarf2_cu *); |
| 770 | |
| 771 | static char *typename_concat (const char *prefix, const char *suffix); |
| 772 | |
| 773 | static char *class_name (struct die_info *die, struct dwarf2_cu *); |
| 774 | |
| 775 | static void read_typedef (struct die_info *, struct dwarf2_cu *); |
| 776 | |
| 777 | static void read_base_type (struct die_info *, struct dwarf2_cu *); |
| 778 | |
| 779 | static void read_subrange_type (struct die_info *die, struct dwarf2_cu *cu); |
| 780 | |
| 781 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
| 782 | |
| 783 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
| 784 | |
| 785 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
| 786 | |
| 787 | static int dwarf2_get_pc_bounds (struct die_info *, |
| 788 | CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *); |
| 789 | |
| 790 | static void get_scope_pc_bounds (struct die_info *, |
| 791 | CORE_ADDR *, CORE_ADDR *, |
| 792 | struct dwarf2_cu *); |
| 793 | |
| 794 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
| 795 | struct dwarf2_cu *); |
| 796 | |
| 797 | static void dwarf2_attach_fields_to_type (struct field_info *, |
| 798 | struct type *, struct dwarf2_cu *); |
| 799 | |
| 800 | static void dwarf2_add_member_fn (struct field_info *, |
| 801 | struct die_info *, struct type *, |
| 802 | struct dwarf2_cu *); |
| 803 | |
| 804 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
| 805 | struct type *, struct dwarf2_cu *); |
| 806 | |
| 807 | static void read_structure_scope (struct die_info *, struct dwarf2_cu *); |
| 808 | |
| 809 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
| 810 | |
| 811 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
| 812 | |
| 813 | static const char *namespace_name (struct die_info *die, |
| 814 | int *is_anonymous, struct dwarf2_cu *); |
| 815 | |
| 816 | static void read_enumeration (struct die_info *, struct dwarf2_cu *); |
| 817 | |
| 818 | static struct type *dwarf_base_type (int, int, struct dwarf2_cu *); |
| 819 | |
| 820 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
| 821 | |
| 822 | static void read_array_type (struct die_info *, struct dwarf2_cu *); |
| 823 | |
| 824 | static void read_tag_pointer_type (struct die_info *, struct dwarf2_cu *); |
| 825 | |
| 826 | static void read_tag_ptr_to_member_type (struct die_info *, |
| 827 | struct dwarf2_cu *); |
| 828 | |
| 829 | static void read_tag_reference_type (struct die_info *, struct dwarf2_cu *); |
| 830 | |
| 831 | static void read_tag_const_type (struct die_info *, struct dwarf2_cu *); |
| 832 | |
| 833 | static void read_tag_volatile_type (struct die_info *, struct dwarf2_cu *); |
| 834 | |
| 835 | static void read_tag_string_type (struct die_info *, struct dwarf2_cu *); |
| 836 | |
| 837 | static void read_subroutine_type (struct die_info *, struct dwarf2_cu *); |
| 838 | |
| 839 | static struct die_info *read_comp_unit (char *, bfd *, struct dwarf2_cu *); |
| 840 | |
| 841 | static struct die_info *read_die_and_children (char *info_ptr, bfd *abfd, |
| 842 | struct dwarf2_cu *, |
| 843 | char **new_info_ptr, |
| 844 | struct die_info *parent); |
| 845 | |
| 846 | static struct die_info *read_die_and_siblings (char *info_ptr, bfd *abfd, |
| 847 | struct dwarf2_cu *, |
| 848 | char **new_info_ptr, |
| 849 | struct die_info *parent); |
| 850 | |
| 851 | static void free_die_list (struct die_info *); |
| 852 | |
| 853 | static struct cleanup *make_cleanup_free_die_list (struct die_info *); |
| 854 | |
| 855 | static void process_die (struct die_info *, struct dwarf2_cu *); |
| 856 | |
| 857 | static char *dwarf2_linkage_name (struct die_info *, struct dwarf2_cu *); |
| 858 | |
| 859 | static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
| 860 | |
| 861 | static struct die_info *dwarf2_extension (struct die_info *die, |
| 862 | struct dwarf2_cu *); |
| 863 | |
| 864 | static char *dwarf_tag_name (unsigned int); |
| 865 | |
| 866 | static char *dwarf_attr_name (unsigned int); |
| 867 | |
| 868 | static char *dwarf_form_name (unsigned int); |
| 869 | |
| 870 | static char *dwarf_stack_op_name (unsigned int); |
| 871 | |
| 872 | static char *dwarf_bool_name (unsigned int); |
| 873 | |
| 874 | static char *dwarf_type_encoding_name (unsigned int); |
| 875 | |
| 876 | #if 0 |
| 877 | static char *dwarf_cfi_name (unsigned int); |
| 878 | |
| 879 | struct die_info *copy_die (struct die_info *); |
| 880 | #endif |
| 881 | |
| 882 | static struct die_info *sibling_die (struct die_info *); |
| 883 | |
| 884 | static void dump_die (struct die_info *); |
| 885 | |
| 886 | static void dump_die_list (struct die_info *); |
| 887 | |
| 888 | static void store_in_ref_table (unsigned int, struct die_info *); |
| 889 | |
| 890 | static void dwarf2_empty_hash_tables (void); |
| 891 | |
| 892 | static unsigned int dwarf2_get_ref_die_offset (struct attribute *, |
| 893 | struct dwarf2_cu *); |
| 894 | |
| 895 | static int dwarf2_get_attr_constant_value (struct attribute *, int); |
| 896 | |
| 897 | static struct die_info *follow_die_ref (unsigned int); |
| 898 | |
| 899 | static struct type *dwarf2_fundamental_type (struct objfile *, int, |
| 900 | struct dwarf2_cu *); |
| 901 | |
| 902 | /* memory allocation interface */ |
| 903 | |
| 904 | static void dwarf2_free_tmp_obstack (void *); |
| 905 | |
| 906 | static struct dwarf_block *dwarf_alloc_block (void); |
| 907 | |
| 908 | static struct abbrev_info *dwarf_alloc_abbrev (void); |
| 909 | |
| 910 | static struct die_info *dwarf_alloc_die (void); |
| 911 | |
| 912 | static void initialize_cu_func_list (struct dwarf2_cu *); |
| 913 | |
| 914 | static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR, |
| 915 | struct dwarf2_cu *); |
| 916 | |
| 917 | static void dwarf_decode_macros (struct line_header *, unsigned int, |
| 918 | char *, bfd *, struct dwarf2_cu *); |
| 919 | |
| 920 | static int attr_form_is_block (struct attribute *); |
| 921 | |
| 922 | static void |
| 923 | dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym, |
| 924 | struct dwarf2_cu *cu); |
| 925 | |
| 926 | /* Try to locate the sections we need for DWARF 2 debugging |
| 927 | information and return true if we have enough to do something. */ |
| 928 | |
| 929 | int |
| 930 | dwarf2_has_info (bfd *abfd) |
| 931 | { |
| 932 | dwarf_info_section = 0; |
| 933 | dwarf_abbrev_section = 0; |
| 934 | dwarf_line_section = 0; |
| 935 | dwarf_str_section = 0; |
| 936 | dwarf_macinfo_section = 0; |
| 937 | dwarf_frame_section = 0; |
| 938 | dwarf_eh_frame_section = 0; |
| 939 | dwarf_ranges_section = 0; |
| 940 | dwarf_loc_section = 0; |
| 941 | |
| 942 | bfd_map_over_sections (abfd, dwarf2_locate_sections, NULL); |
| 943 | return (dwarf_info_section != NULL && dwarf_abbrev_section != NULL); |
| 944 | } |
| 945 | |
| 946 | /* This function is mapped across the sections and remembers the |
| 947 | offset and size of each of the debugging sections we are interested |
| 948 | in. */ |
| 949 | |
| 950 | static void |
| 951 | dwarf2_locate_sections (bfd *ignore_abfd, asection *sectp, void *ignore_ptr) |
| 952 | { |
| 953 | if (strcmp (sectp->name, INFO_SECTION) == 0) |
| 954 | { |
| 955 | dwarf_info_size = bfd_get_section_size_before_reloc (sectp); |
| 956 | dwarf_info_section = sectp; |
| 957 | } |
| 958 | else if (strcmp (sectp->name, ABBREV_SECTION) == 0) |
| 959 | { |
| 960 | dwarf_abbrev_size = bfd_get_section_size_before_reloc (sectp); |
| 961 | dwarf_abbrev_section = sectp; |
| 962 | } |
| 963 | else if (strcmp (sectp->name, LINE_SECTION) == 0) |
| 964 | { |
| 965 | dwarf_line_size = bfd_get_section_size_before_reloc (sectp); |
| 966 | dwarf_line_section = sectp; |
| 967 | } |
| 968 | else if (strcmp (sectp->name, PUBNAMES_SECTION) == 0) |
| 969 | { |
| 970 | dwarf_pubnames_size = bfd_get_section_size_before_reloc (sectp); |
| 971 | dwarf_pubnames_section = sectp; |
| 972 | } |
| 973 | else if (strcmp (sectp->name, ARANGES_SECTION) == 0) |
| 974 | { |
| 975 | dwarf_aranges_size = bfd_get_section_size_before_reloc (sectp); |
| 976 | dwarf_aranges_section = sectp; |
| 977 | } |
| 978 | else if (strcmp (sectp->name, LOC_SECTION) == 0) |
| 979 | { |
| 980 | dwarf_loc_size = bfd_get_section_size_before_reloc (sectp); |
| 981 | dwarf_loc_section = sectp; |
| 982 | } |
| 983 | else if (strcmp (sectp->name, MACINFO_SECTION) == 0) |
| 984 | { |
| 985 | dwarf_macinfo_size = bfd_get_section_size_before_reloc (sectp); |
| 986 | dwarf_macinfo_section = sectp; |
| 987 | } |
| 988 | else if (strcmp (sectp->name, STR_SECTION) == 0) |
| 989 | { |
| 990 | dwarf_str_size = bfd_get_section_size_before_reloc (sectp); |
| 991 | dwarf_str_section = sectp; |
| 992 | } |
| 993 | else if (strcmp (sectp->name, FRAME_SECTION) == 0) |
| 994 | { |
| 995 | dwarf_frame_size = bfd_get_section_size_before_reloc (sectp); |
| 996 | dwarf_frame_section = sectp; |
| 997 | } |
| 998 | else if (strcmp (sectp->name, EH_FRAME_SECTION) == 0) |
| 999 | { |
| 1000 | flagword aflag = bfd_get_section_flags (ignore_abfd, sectp); |
| 1001 | if (aflag & SEC_HAS_CONTENTS) |
| 1002 | { |
| 1003 | dwarf_eh_frame_size = bfd_get_section_size_before_reloc (sectp); |
| 1004 | dwarf_eh_frame_section = sectp; |
| 1005 | } |
| 1006 | } |
| 1007 | else if (strcmp (sectp->name, RANGES_SECTION) == 0) |
| 1008 | { |
| 1009 | dwarf_ranges_size = bfd_get_section_size_before_reloc (sectp); |
| 1010 | dwarf_ranges_section = sectp; |
| 1011 | } |
| 1012 | } |
| 1013 | |
| 1014 | /* Build a partial symbol table. */ |
| 1015 | |
| 1016 | void |
| 1017 | dwarf2_build_psymtabs (struct objfile *objfile, int mainline) |
| 1018 | { |
| 1019 | |
| 1020 | /* We definitely need the .debug_info and .debug_abbrev sections */ |
| 1021 | |
| 1022 | dwarf_info_buffer = dwarf2_read_section (objfile, dwarf_info_section); |
| 1023 | dwarf_abbrev_buffer = dwarf2_read_section (objfile, dwarf_abbrev_section); |
| 1024 | |
| 1025 | if (dwarf_line_section) |
| 1026 | dwarf_line_buffer = dwarf2_read_section (objfile, dwarf_line_section); |
| 1027 | else |
| 1028 | dwarf_line_buffer = NULL; |
| 1029 | |
| 1030 | if (dwarf_str_section) |
| 1031 | dwarf_str_buffer = dwarf2_read_section (objfile, dwarf_str_section); |
| 1032 | else |
| 1033 | dwarf_str_buffer = NULL; |
| 1034 | |
| 1035 | if (dwarf_macinfo_section) |
| 1036 | dwarf_macinfo_buffer = dwarf2_read_section (objfile, |
| 1037 | dwarf_macinfo_section); |
| 1038 | else |
| 1039 | dwarf_macinfo_buffer = NULL; |
| 1040 | |
| 1041 | if (dwarf_ranges_section) |
| 1042 | dwarf_ranges_buffer = dwarf2_read_section (objfile, dwarf_ranges_section); |
| 1043 | else |
| 1044 | dwarf_ranges_buffer = NULL; |
| 1045 | |
| 1046 | if (dwarf_loc_section) |
| 1047 | dwarf_loc_buffer = dwarf2_read_section (objfile, dwarf_loc_section); |
| 1048 | else |
| 1049 | dwarf_loc_buffer = NULL; |
| 1050 | |
| 1051 | if (mainline |
| 1052 | || (objfile->global_psymbols.size == 0 |
| 1053 | && objfile->static_psymbols.size == 0)) |
| 1054 | { |
| 1055 | init_psymbol_list (objfile, 1024); |
| 1056 | } |
| 1057 | |
| 1058 | #if 0 |
| 1059 | if (dwarf_aranges_offset && dwarf_pubnames_offset) |
| 1060 | { |
| 1061 | /* Things are significantly easier if we have .debug_aranges and |
| 1062 | .debug_pubnames sections */ |
| 1063 | |
| 1064 | dwarf2_build_psymtabs_easy (objfile, mainline); |
| 1065 | } |
| 1066 | else |
| 1067 | #endif |
| 1068 | /* only test this case for now */ |
| 1069 | { |
| 1070 | /* In this case we have to work a bit harder */ |
| 1071 | dwarf2_build_psymtabs_hard (objfile, mainline); |
| 1072 | } |
| 1073 | } |
| 1074 | |
| 1075 | #if 0 |
| 1076 | /* Build the partial symbol table from the information in the |
| 1077 | .debug_pubnames and .debug_aranges sections. */ |
| 1078 | |
| 1079 | static void |
| 1080 | dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline) |
| 1081 | { |
| 1082 | bfd *abfd = objfile->obfd; |
| 1083 | char *aranges_buffer, *pubnames_buffer; |
| 1084 | char *aranges_ptr, *pubnames_ptr; |
| 1085 | unsigned int entry_length, version, info_offset, info_size; |
| 1086 | |
| 1087 | pubnames_buffer = dwarf2_read_section (objfile, |
| 1088 | dwarf_pubnames_section); |
| 1089 | pubnames_ptr = pubnames_buffer; |
| 1090 | while ((pubnames_ptr - pubnames_buffer) < dwarf_pubnames_size) |
| 1091 | { |
| 1092 | struct comp_unit_head cu_header; |
| 1093 | int bytes_read; |
| 1094 | |
| 1095 | entry_length = read_initial_length (abfd, pubnames_ptr, &cu_header, |
| 1096 | &bytes_read); |
| 1097 | pubnames_ptr += bytes_read; |
| 1098 | version = read_1_byte (abfd, pubnames_ptr); |
| 1099 | pubnames_ptr += 1; |
| 1100 | info_offset = read_4_bytes (abfd, pubnames_ptr); |
| 1101 | pubnames_ptr += 4; |
| 1102 | info_size = read_4_bytes (abfd, pubnames_ptr); |
| 1103 | pubnames_ptr += 4; |
| 1104 | } |
| 1105 | |
| 1106 | aranges_buffer = dwarf2_read_section (objfile, |
| 1107 | dwarf_aranges_section); |
| 1108 | |
| 1109 | } |
| 1110 | #endif |
| 1111 | |
| 1112 | /* Read in the comp unit header information from the debug_info at |
| 1113 | info_ptr. */ |
| 1114 | |
| 1115 | static char * |
| 1116 | read_comp_unit_head (struct comp_unit_head *cu_header, |
| 1117 | char *info_ptr, bfd *abfd) |
| 1118 | { |
| 1119 | int signed_addr; |
| 1120 | int bytes_read; |
| 1121 | cu_header->length = read_initial_length (abfd, info_ptr, cu_header, |
| 1122 | &bytes_read); |
| 1123 | info_ptr += bytes_read; |
| 1124 | cu_header->version = read_2_bytes (abfd, info_ptr); |
| 1125 | info_ptr += 2; |
| 1126 | cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header, |
| 1127 | &bytes_read); |
| 1128 | info_ptr += bytes_read; |
| 1129 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
| 1130 | info_ptr += 1; |
| 1131 | signed_addr = bfd_get_sign_extend_vma (abfd); |
| 1132 | if (signed_addr < 0) |
| 1133 | internal_error (__FILE__, __LINE__, |
| 1134 | "read_comp_unit_head: dwarf from non elf file"); |
| 1135 | cu_header->signed_addr_p = signed_addr; |
| 1136 | return info_ptr; |
| 1137 | } |
| 1138 | |
| 1139 | /* Build the partial symbol table by doing a quick pass through the |
| 1140 | .debug_info and .debug_abbrev sections. */ |
| 1141 | |
| 1142 | static void |
| 1143 | dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline) |
| 1144 | { |
| 1145 | /* Instead of reading this into a big buffer, we should probably use |
| 1146 | mmap() on architectures that support it. (FIXME) */ |
| 1147 | bfd *abfd = objfile->obfd; |
| 1148 | char *info_ptr, *abbrev_ptr; |
| 1149 | char *beg_of_comp_unit; |
| 1150 | struct partial_die_info comp_unit_die; |
| 1151 | struct partial_symtab *pst; |
| 1152 | struct cleanup *back_to; |
| 1153 | CORE_ADDR lowpc, highpc, baseaddr; |
| 1154 | |
| 1155 | info_ptr = dwarf_info_buffer; |
| 1156 | abbrev_ptr = dwarf_abbrev_buffer; |
| 1157 | |
| 1158 | /* We use dwarf2_tmp_obstack for objects that don't need to survive |
| 1159 | the partial symbol scan, like attribute values. |
| 1160 | |
| 1161 | We could reduce our peak memory consumption during partial symbol |
| 1162 | table construction by freeing stuff from this obstack more often |
| 1163 | --- say, after processing each compilation unit, or each die --- |
| 1164 | but it turns out that this saves almost nothing. For an |
| 1165 | executable with 11Mb of Dwarf 2 data, I found about 64k allocated |
| 1166 | on dwarf2_tmp_obstack. Some investigation showed: |
| 1167 | |
| 1168 | 1) 69% of the attributes used forms DW_FORM_addr, DW_FORM_data*, |
| 1169 | DW_FORM_flag, DW_FORM_[su]data, and DW_FORM_ref*. These are |
| 1170 | all fixed-length values not requiring dynamic allocation. |
| 1171 | |
| 1172 | 2) 30% of the attributes used the form DW_FORM_string. For |
| 1173 | DW_FORM_string, read_attribute simply hands back a pointer to |
| 1174 | the null-terminated string in dwarf_info_buffer, so no dynamic |
| 1175 | allocation is needed there either. |
| 1176 | |
| 1177 | 3) The remaining 1% of the attributes all used DW_FORM_block1. |
| 1178 | 75% of those were DW_AT_frame_base location lists for |
| 1179 | functions; the rest were DW_AT_location attributes, probably |
| 1180 | for the global variables. |
| 1181 | |
| 1182 | Anyway, what this all means is that the memory the dwarf2 |
| 1183 | reader uses as temporary space reading partial symbols is about |
| 1184 | 0.5% as much as we use for dwarf_*_buffer. That's noise. */ |
| 1185 | |
| 1186 | obstack_init (&dwarf2_tmp_obstack); |
| 1187 | back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL); |
| 1188 | |
| 1189 | /* Since the objects we're extracting from dwarf_info_buffer vary in |
| 1190 | length, only the individual functions to extract them (like |
| 1191 | read_comp_unit_head and read_partial_die) can really know whether |
| 1192 | the buffer is large enough to hold another complete object. |
| 1193 | |
| 1194 | At the moment, they don't actually check that. If |
| 1195 | dwarf_info_buffer holds just one extra byte after the last |
| 1196 | compilation unit's dies, then read_comp_unit_head will happily |
| 1197 | read off the end of the buffer. read_partial_die is similarly |
| 1198 | casual. Those functions should be fixed. |
| 1199 | |
| 1200 | For this loop condition, simply checking whether there's any data |
| 1201 | left at all should be sufficient. */ |
| 1202 | while (info_ptr < dwarf_info_buffer + dwarf_info_size) |
| 1203 | { |
| 1204 | struct dwarf2_cu cu; |
| 1205 | beg_of_comp_unit = info_ptr; |
| 1206 | |
| 1207 | cu.objfile = objfile; |
| 1208 | info_ptr = read_comp_unit_head (&cu.header, info_ptr, abfd); |
| 1209 | |
| 1210 | if (cu.header.version != 2) |
| 1211 | { |
| 1212 | error ("Dwarf Error: wrong version in compilation unit header (is %d, should be %d) [in module %s]", cu.header.version, 2, bfd_get_filename (abfd)); |
| 1213 | return; |
| 1214 | } |
| 1215 | if (cu.header.abbrev_offset >= dwarf_abbrev_size) |
| 1216 | { |
| 1217 | error ("Dwarf Error: bad offset (0x%lx) in compilation unit header (offset 0x%lx + 6) [in module %s]", |
| 1218 | (long) cu.header.abbrev_offset, |
| 1219 | (long) (beg_of_comp_unit - dwarf_info_buffer), |
| 1220 | bfd_get_filename (abfd)); |
| 1221 | return; |
| 1222 | } |
| 1223 | if (beg_of_comp_unit + cu.header.length + cu.header.initial_length_size |
| 1224 | > dwarf_info_buffer + dwarf_info_size) |
| 1225 | { |
| 1226 | error ("Dwarf Error: bad length (0x%lx) in compilation unit header (offset 0x%lx + 0) [in module %s]", |
| 1227 | (long) cu.header.length, |
| 1228 | (long) (beg_of_comp_unit - dwarf_info_buffer), |
| 1229 | bfd_get_filename (abfd)); |
| 1230 | return; |
| 1231 | } |
| 1232 | /* Complete the cu_header */ |
| 1233 | cu.header.offset = beg_of_comp_unit - dwarf_info_buffer; |
| 1234 | cu.header.first_die_ptr = info_ptr; |
| 1235 | cu.header.cu_head_ptr = beg_of_comp_unit; |
| 1236 | |
| 1237 | cu.list_in_scope = &file_symbols; |
| 1238 | |
| 1239 | /* Read the abbrevs for this compilation unit into a table */ |
| 1240 | dwarf2_read_abbrevs (abfd, &cu); |
| 1241 | make_cleanup (dwarf2_empty_abbrev_table, cu.header.dwarf2_abbrevs); |
| 1242 | |
| 1243 | /* Read the compilation unit die */ |
| 1244 | info_ptr = read_partial_die (&comp_unit_die, abfd, info_ptr, |
| 1245 | &cu); |
| 1246 | |
| 1247 | /* Set the language we're debugging */ |
| 1248 | set_cu_language (comp_unit_die.language, &cu); |
| 1249 | |
| 1250 | /* Allocate a new partial symbol table structure */ |
| 1251 | pst = start_psymtab_common (objfile, objfile->section_offsets, |
| 1252 | comp_unit_die.name ? comp_unit_die.name : "", |
| 1253 | comp_unit_die.lowpc, |
| 1254 | objfile->global_psymbols.next, |
| 1255 | objfile->static_psymbols.next); |
| 1256 | |
| 1257 | pst->read_symtab_private = (char *) |
| 1258 | obstack_alloc (&objfile->objfile_obstack, sizeof (struct dwarf2_pinfo)); |
| 1259 | DWARF_INFO_BUFFER (pst) = dwarf_info_buffer; |
| 1260 | DWARF_INFO_OFFSET (pst) = beg_of_comp_unit - dwarf_info_buffer; |
| 1261 | DWARF_ABBREV_BUFFER (pst) = dwarf_abbrev_buffer; |
| 1262 | DWARF_ABBREV_SIZE (pst) = dwarf_abbrev_size; |
| 1263 | DWARF_LINE_BUFFER (pst) = dwarf_line_buffer; |
| 1264 | DWARF_LINE_SIZE (pst) = dwarf_line_size; |
| 1265 | DWARF_STR_BUFFER (pst) = dwarf_str_buffer; |
| 1266 | DWARF_STR_SIZE (pst) = dwarf_str_size; |
| 1267 | DWARF_MACINFO_BUFFER (pst) = dwarf_macinfo_buffer; |
| 1268 | DWARF_MACINFO_SIZE (pst) = dwarf_macinfo_size; |
| 1269 | DWARF_RANGES_BUFFER (pst) = dwarf_ranges_buffer; |
| 1270 | DWARF_RANGES_SIZE (pst) = dwarf_ranges_size; |
| 1271 | DWARF_LOC_BUFFER (pst) = dwarf_loc_buffer; |
| 1272 | DWARF_LOC_SIZE (pst) = dwarf_loc_size; |
| 1273 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 1274 | |
| 1275 | /* Store the function that reads in the rest of the symbol table */ |
| 1276 | pst->read_symtab = dwarf2_psymtab_to_symtab; |
| 1277 | |
| 1278 | /* Check if comp unit has_children. |
| 1279 | If so, read the rest of the partial symbols from this comp unit. |
| 1280 | If not, there's no more debug_info for this comp unit. */ |
| 1281 | if (comp_unit_die.has_children) |
| 1282 | { |
| 1283 | lowpc = ((CORE_ADDR) -1); |
| 1284 | highpc = ((CORE_ADDR) 0); |
| 1285 | |
| 1286 | info_ptr = scan_partial_symbols (info_ptr, &lowpc, &highpc, |
| 1287 | &cu, NULL); |
| 1288 | |
| 1289 | /* If we didn't find a lowpc, set it to highpc to avoid |
| 1290 | complaints from `maint check'. */ |
| 1291 | if (lowpc == ((CORE_ADDR) -1)) |
| 1292 | lowpc = highpc; |
| 1293 | |
| 1294 | /* If the compilation unit didn't have an explicit address range, |
| 1295 | then use the information extracted from its child dies. */ |
| 1296 | if (! comp_unit_die.has_pc_info) |
| 1297 | { |
| 1298 | comp_unit_die.lowpc = lowpc; |
| 1299 | comp_unit_die.highpc = highpc; |
| 1300 | } |
| 1301 | } |
| 1302 | pst->textlow = comp_unit_die.lowpc + baseaddr; |
| 1303 | pst->texthigh = comp_unit_die.highpc + baseaddr; |
| 1304 | |
| 1305 | pst->n_global_syms = objfile->global_psymbols.next - |
| 1306 | (objfile->global_psymbols.list + pst->globals_offset); |
| 1307 | pst->n_static_syms = objfile->static_psymbols.next - |
| 1308 | (objfile->static_psymbols.list + pst->statics_offset); |
| 1309 | sort_pst_symbols (pst); |
| 1310 | |
| 1311 | /* If there is already a psymtab or symtab for a file of this |
| 1312 | name, remove it. (If there is a symtab, more drastic things |
| 1313 | also happen.) This happens in VxWorks. */ |
| 1314 | free_named_symtabs (pst->filename); |
| 1315 | |
| 1316 | info_ptr = beg_of_comp_unit + cu.header.length |
| 1317 | + cu.header.initial_length_size; |
| 1318 | } |
| 1319 | do_cleanups (back_to); |
| 1320 | } |
| 1321 | |
| 1322 | /* Read in all interesting dies to the end of the compilation unit or |
| 1323 | to the end of the current namespace. NAMESPACE is NULL if we |
| 1324 | haven't yet encountered any DW_TAG_namespace entries; otherwise, |
| 1325 | it's the name of the current namespace. In particular, it's the |
| 1326 | empty string if we're currently in the global namespace but have |
| 1327 | previously encountered a DW_TAG_namespace. */ |
| 1328 | |
| 1329 | static char * |
| 1330 | scan_partial_symbols (char *info_ptr, CORE_ADDR *lowpc, |
| 1331 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
| 1332 | const char *namespace) |
| 1333 | { |
| 1334 | struct objfile *objfile = cu->objfile; |
| 1335 | bfd *abfd = objfile->obfd; |
| 1336 | struct partial_die_info pdi; |
| 1337 | |
| 1338 | /* Now, march along the PDI's, descending into ones which have |
| 1339 | interesting children but skipping the children of the other ones, |
| 1340 | until we reach the end of the compilation unit. */ |
| 1341 | |
| 1342 | while (1) |
| 1343 | { |
| 1344 | /* This flag tells whether or not info_ptr has gotten updated |
| 1345 | inside the loop. */ |
| 1346 | int info_ptr_updated = 0; |
| 1347 | |
| 1348 | info_ptr = read_partial_die (&pdi, abfd, info_ptr, cu); |
| 1349 | |
| 1350 | /* Anonymous namespaces have no name but have interesting |
| 1351 | children, so we need to look at them. Ditto for anonymous |
| 1352 | enums. */ |
| 1353 | |
| 1354 | if (pdi.name != NULL || pdi.tag == DW_TAG_namespace |
| 1355 | || pdi.tag == DW_TAG_enumeration_type) |
| 1356 | { |
| 1357 | switch (pdi.tag) |
| 1358 | { |
| 1359 | case DW_TAG_subprogram: |
| 1360 | if (pdi.has_pc_info) |
| 1361 | { |
| 1362 | if (pdi.lowpc < *lowpc) |
| 1363 | { |
| 1364 | *lowpc = pdi.lowpc; |
| 1365 | } |
| 1366 | if (pdi.highpc > *highpc) |
| 1367 | { |
| 1368 | *highpc = pdi.highpc; |
| 1369 | } |
| 1370 | if (!pdi.is_declaration) |
| 1371 | { |
| 1372 | add_partial_symbol (&pdi, cu, namespace); |
| 1373 | } |
| 1374 | } |
| 1375 | break; |
| 1376 | case DW_TAG_variable: |
| 1377 | case DW_TAG_typedef: |
| 1378 | case DW_TAG_union_type: |
| 1379 | if (!pdi.is_declaration) |
| 1380 | { |
| 1381 | add_partial_symbol (&pdi, cu, namespace); |
| 1382 | } |
| 1383 | break; |
| 1384 | case DW_TAG_class_type: |
| 1385 | case DW_TAG_structure_type: |
| 1386 | if (!pdi.is_declaration) |
| 1387 | { |
| 1388 | info_ptr = add_partial_structure (&pdi, info_ptr, cu, |
| 1389 | namespace); |
| 1390 | info_ptr_updated = 1; |
| 1391 | } |
| 1392 | break; |
| 1393 | case DW_TAG_enumeration_type: |
| 1394 | if (!pdi.is_declaration) |
| 1395 | { |
| 1396 | info_ptr = add_partial_enumeration (&pdi, info_ptr, cu, |
| 1397 | namespace); |
| 1398 | info_ptr_updated = 1; |
| 1399 | } |
| 1400 | break; |
| 1401 | case DW_TAG_base_type: |
| 1402 | case DW_TAG_subrange_type: |
| 1403 | /* File scope base type definitions are added to the partial |
| 1404 | symbol table. */ |
| 1405 | add_partial_symbol (&pdi, cu, namespace); |
| 1406 | break; |
| 1407 | case DW_TAG_namespace: |
| 1408 | /* We've hit a DW_TAG_namespace entry, so we know this |
| 1409 | file has been compiled using a compiler that |
| 1410 | generates them; update NAMESPACE to reflect that. */ |
| 1411 | if (namespace == NULL) |
| 1412 | namespace = ""; |
| 1413 | info_ptr = add_partial_namespace (&pdi, info_ptr, lowpc, highpc, |
| 1414 | cu, namespace); |
| 1415 | info_ptr_updated = 1; |
| 1416 | break; |
| 1417 | default: |
| 1418 | break; |
| 1419 | } |
| 1420 | } |
| 1421 | |
| 1422 | if (pdi.tag == 0) |
| 1423 | break; |
| 1424 | |
| 1425 | /* If the die has a sibling, skip to the sibling, unless another |
| 1426 | function has already updated info_ptr for us. */ |
| 1427 | |
| 1428 | /* NOTE: carlton/2003-06-16: This is a bit hackish, but whether |
| 1429 | or not we want to update this depends on enough stuff (not |
| 1430 | only pdi.tag but also whether or not pdi.name is NULL) that |
| 1431 | this seems like the easiest way to handle the issue. */ |
| 1432 | |
| 1433 | if (!info_ptr_updated) |
| 1434 | info_ptr = locate_pdi_sibling (&pdi, info_ptr, abfd, cu); |
| 1435 | } |
| 1436 | |
| 1437 | return info_ptr; |
| 1438 | } |
| 1439 | |
| 1440 | static void |
| 1441 | add_partial_symbol (struct partial_die_info *pdi, |
| 1442 | struct dwarf2_cu *cu, const char *namespace) |
| 1443 | { |
| 1444 | struct objfile *objfile = cu->objfile; |
| 1445 | CORE_ADDR addr = 0; |
| 1446 | char *actual_name = pdi->name; |
| 1447 | const struct partial_symbol *psym = NULL; |
| 1448 | CORE_ADDR baseaddr; |
| 1449 | |
| 1450 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 1451 | |
| 1452 | /* If we're not in the global namespace and if the namespace name |
| 1453 | isn't encoded in a mangled actual_name, add it. */ |
| 1454 | |
| 1455 | if (pdi_needs_namespace (pdi->tag, namespace)) |
| 1456 | { |
| 1457 | actual_name = alloca (strlen (pdi->name) + 2 + strlen (namespace) + 1); |
| 1458 | strcpy (actual_name, namespace); |
| 1459 | strcat (actual_name, "::"); |
| 1460 | strcat (actual_name, pdi->name); |
| 1461 | } |
| 1462 | |
| 1463 | switch (pdi->tag) |
| 1464 | { |
| 1465 | case DW_TAG_subprogram: |
| 1466 | if (pdi->is_external) |
| 1467 | { |
| 1468 | /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
| 1469 | mst_text, objfile); */ |
| 1470 | psym = add_psymbol_to_list (actual_name, strlen (actual_name), |
| 1471 | VAR_DOMAIN, LOC_BLOCK, |
| 1472 | &objfile->global_psymbols, |
| 1473 | 0, pdi->lowpc + baseaddr, |
| 1474 | cu->language, objfile); |
| 1475 | } |
| 1476 | else |
| 1477 | { |
| 1478 | /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
| 1479 | mst_file_text, objfile); */ |
| 1480 | psym = add_psymbol_to_list (actual_name, strlen (actual_name), |
| 1481 | VAR_DOMAIN, LOC_BLOCK, |
| 1482 | &objfile->static_psymbols, |
| 1483 | 0, pdi->lowpc + baseaddr, |
| 1484 | cu->language, objfile); |
| 1485 | } |
| 1486 | break; |
| 1487 | case DW_TAG_variable: |
| 1488 | if (pdi->is_external) |
| 1489 | { |
| 1490 | /* Global Variable. |
| 1491 | Don't enter into the minimal symbol tables as there is |
| 1492 | a minimal symbol table entry from the ELF symbols already. |
| 1493 | Enter into partial symbol table if it has a location |
| 1494 | descriptor or a type. |
| 1495 | If the location descriptor is missing, new_symbol will create |
| 1496 | a LOC_UNRESOLVED symbol, the address of the variable will then |
| 1497 | be determined from the minimal symbol table whenever the variable |
| 1498 | is referenced. |
| 1499 | The address for the partial symbol table entry is not |
| 1500 | used by GDB, but it comes in handy for debugging partial symbol |
| 1501 | table building. */ |
| 1502 | |
| 1503 | if (pdi->locdesc) |
| 1504 | addr = decode_locdesc (pdi->locdesc, cu); |
| 1505 | if (pdi->locdesc || pdi->has_type) |
| 1506 | psym = add_psymbol_to_list (actual_name, strlen (actual_name), |
| 1507 | VAR_DOMAIN, LOC_STATIC, |
| 1508 | &objfile->global_psymbols, |
| 1509 | 0, addr + baseaddr, |
| 1510 | cu->language, objfile); |
| 1511 | } |
| 1512 | else |
| 1513 | { |
| 1514 | /* Static Variable. Skip symbols without location descriptors. */ |
| 1515 | if (pdi->locdesc == NULL) |
| 1516 | return; |
| 1517 | addr = decode_locdesc (pdi->locdesc, cu); |
| 1518 | /*prim_record_minimal_symbol (actual_name, addr + baseaddr, |
| 1519 | mst_file_data, objfile); */ |
| 1520 | psym = add_psymbol_to_list (actual_name, strlen (actual_name), |
| 1521 | VAR_DOMAIN, LOC_STATIC, |
| 1522 | &objfile->static_psymbols, |
| 1523 | 0, addr + baseaddr, |
| 1524 | cu->language, objfile); |
| 1525 | } |
| 1526 | break; |
| 1527 | case DW_TAG_typedef: |
| 1528 | case DW_TAG_base_type: |
| 1529 | case DW_TAG_subrange_type: |
| 1530 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 1531 | VAR_DOMAIN, LOC_TYPEDEF, |
| 1532 | &objfile->static_psymbols, |
| 1533 | 0, (CORE_ADDR) 0, cu->language, objfile); |
| 1534 | break; |
| 1535 | case DW_TAG_class_type: |
| 1536 | case DW_TAG_structure_type: |
| 1537 | case DW_TAG_union_type: |
| 1538 | case DW_TAG_enumeration_type: |
| 1539 | /* Skip aggregate types without children, these are external |
| 1540 | references. */ |
| 1541 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
| 1542 | static vs. global. */ |
| 1543 | if (pdi->has_children == 0) |
| 1544 | return; |
| 1545 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 1546 | STRUCT_DOMAIN, LOC_TYPEDEF, |
| 1547 | cu->language == language_cplus |
| 1548 | ? &objfile->global_psymbols |
| 1549 | : &objfile->static_psymbols, |
| 1550 | 0, (CORE_ADDR) 0, cu->language, objfile); |
| 1551 | |
| 1552 | if (cu->language == language_cplus) |
| 1553 | { |
| 1554 | /* For C++, these implicitly act as typedefs as well. */ |
| 1555 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 1556 | VAR_DOMAIN, LOC_TYPEDEF, |
| 1557 | &objfile->global_psymbols, |
| 1558 | 0, (CORE_ADDR) 0, cu->language, objfile); |
| 1559 | } |
| 1560 | break; |
| 1561 | case DW_TAG_enumerator: |
| 1562 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 1563 | VAR_DOMAIN, LOC_CONST, |
| 1564 | cu->language == language_cplus |
| 1565 | ? &objfile->global_psymbols |
| 1566 | : &objfile->static_psymbols, |
| 1567 | 0, (CORE_ADDR) 0, cu->language, objfile); |
| 1568 | break; |
| 1569 | default: |
| 1570 | break; |
| 1571 | } |
| 1572 | |
| 1573 | /* Check to see if we should scan the name for possible namespace |
| 1574 | info. Only do this if this is C++, if we don't have namespace |
| 1575 | debugging info in the file, if the psym is of an appropriate type |
| 1576 | (otherwise we'll have psym == NULL), and if we actually had a |
| 1577 | mangled name to begin with. */ |
| 1578 | |
| 1579 | if (cu->language == language_cplus |
| 1580 | && namespace == NULL |
| 1581 | && psym != NULL |
| 1582 | && SYMBOL_CPLUS_DEMANGLED_NAME (psym) != NULL) |
| 1583 | cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym), |
| 1584 | objfile); |
| 1585 | } |
| 1586 | |
| 1587 | /* Determine whether a die of type TAG living in the C++ namespace |
| 1588 | NAMESPACE needs to have the name of the namespace prepended to the |
| 1589 | name listed in the die. */ |
| 1590 | |
| 1591 | static int |
| 1592 | pdi_needs_namespace (enum dwarf_tag tag, const char *namespace) |
| 1593 | { |
| 1594 | if (namespace == NULL || namespace[0] == '\0') |
| 1595 | return 0; |
| 1596 | |
| 1597 | switch (tag) |
| 1598 | { |
| 1599 | case DW_TAG_typedef: |
| 1600 | case DW_TAG_class_type: |
| 1601 | case DW_TAG_structure_type: |
| 1602 | case DW_TAG_union_type: |
| 1603 | case DW_TAG_enumeration_type: |
| 1604 | case DW_TAG_enumerator: |
| 1605 | return 1; |
| 1606 | default: |
| 1607 | return 0; |
| 1608 | } |
| 1609 | } |
| 1610 | |
| 1611 | /* Read a partial die corresponding to a namespace; also, add a symbol |
| 1612 | corresponding to that namespace to the symbol table. NAMESPACE is |
| 1613 | the name of the enclosing namespace. */ |
| 1614 | |
| 1615 | static char * |
| 1616 | add_partial_namespace (struct partial_die_info *pdi, char *info_ptr, |
| 1617 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 1618 | struct dwarf2_cu *cu, const char *namespace) |
| 1619 | { |
| 1620 | struct objfile *objfile = cu->objfile; |
| 1621 | const char *new_name = pdi->name; |
| 1622 | char *full_name; |
| 1623 | |
| 1624 | /* Calculate the full name of the namespace that we just entered. */ |
| 1625 | |
| 1626 | if (new_name == NULL) |
| 1627 | new_name = "(anonymous namespace)"; |
| 1628 | full_name = alloca (strlen (namespace) + 2 + strlen (new_name) + 1); |
| 1629 | strcpy (full_name, namespace); |
| 1630 | if (*namespace != '\0') |
| 1631 | strcat (full_name, "::"); |
| 1632 | strcat (full_name, new_name); |
| 1633 | |
| 1634 | /* FIXME: carlton/2003-10-07: We can't just replace this by a call |
| 1635 | to add_partial_symbol, because we don't have a way to pass in the |
| 1636 | full name to that function; that might be a flaw in |
| 1637 | add_partial_symbol's interface. */ |
| 1638 | |
| 1639 | add_psymbol_to_list (full_name, strlen (full_name), |
| 1640 | VAR_DOMAIN, LOC_TYPEDEF, |
| 1641 | &objfile->global_psymbols, |
| 1642 | 0, 0, cu->language, objfile); |
| 1643 | |
| 1644 | /* Now scan partial symbols in that namespace. */ |
| 1645 | |
| 1646 | if (pdi->has_children) |
| 1647 | info_ptr = scan_partial_symbols (info_ptr, lowpc, highpc, cu, full_name); |
| 1648 | |
| 1649 | return info_ptr; |
| 1650 | } |
| 1651 | |
| 1652 | /* Read a partial die corresponding to a class or structure. */ |
| 1653 | |
| 1654 | static char * |
| 1655 | add_partial_structure (struct partial_die_info *struct_pdi, char *info_ptr, |
| 1656 | struct dwarf2_cu *cu, |
| 1657 | const char *namespace) |
| 1658 | { |
| 1659 | bfd *abfd = cu->objfile->obfd; |
| 1660 | char *actual_class_name = NULL; |
| 1661 | |
| 1662 | if (cu->language == language_cplus |
| 1663 | && (namespace == NULL || namespace[0] == '\0') |
| 1664 | && struct_pdi->name != NULL |
| 1665 | && struct_pdi->has_children) |
| 1666 | { |
| 1667 | /* See if we can figure out if the class lives in a namespace |
| 1668 | (or is nested within another class.) We do this by looking |
| 1669 | for a member function; its demangled name will contain |
| 1670 | namespace info, if there is any. */ |
| 1671 | |
| 1672 | /* NOTE: carlton/2003-10-07: Getting the info this way changes |
| 1673 | what template types look like, because the demangler |
| 1674 | frequently doesn't give the same name as the debug info. We |
| 1675 | could fix this by only using the demangled name to get the |
| 1676 | prefix (but see comment in read_structure_scope). */ |
| 1677 | |
| 1678 | /* FIXME: carlton/2004-01-23: If NAMESPACE equals "", we have |
| 1679 | the appropriate debug information, so it would be nice to be |
| 1680 | able to avoid this hack. But NAMESPACE may not be the |
| 1681 | namespace where this class was defined: NAMESPACE reflects |
| 1682 | where STRUCT_PDI occurs in the tree of dies, but because of |
| 1683 | DW_AT_specification, that may not actually tell us where the |
| 1684 | class is defined. (See the comment in read_func_scope for an |
| 1685 | example of how this could occur.) |
| 1686 | |
| 1687 | Unfortunately, our current partial symtab data structures are |
| 1688 | completely unable to deal with DW_AT_specification. So, for |
| 1689 | now, the best thing to do is to get nesting information from |
| 1690 | places other than the tree structure of dies if there's any |
| 1691 | chance that a DW_AT_specification is involved. :-( */ |
| 1692 | |
| 1693 | char *next_child = info_ptr; |
| 1694 | |
| 1695 | while (1) |
| 1696 | { |
| 1697 | struct partial_die_info child_pdi; |
| 1698 | |
| 1699 | next_child = read_partial_die (&child_pdi, abfd, next_child, |
| 1700 | cu); |
| 1701 | if (!child_pdi.tag) |
| 1702 | break; |
| 1703 | if (child_pdi.tag == DW_TAG_subprogram) |
| 1704 | { |
| 1705 | actual_class_name = class_name_from_physname (child_pdi.name); |
| 1706 | if (actual_class_name != NULL) |
| 1707 | struct_pdi->name = actual_class_name; |
| 1708 | break; |
| 1709 | } |
| 1710 | else |
| 1711 | { |
| 1712 | next_child = locate_pdi_sibling (&child_pdi, next_child, |
| 1713 | abfd, cu); |
| 1714 | } |
| 1715 | } |
| 1716 | } |
| 1717 | |
| 1718 | add_partial_symbol (struct_pdi, cu, namespace); |
| 1719 | xfree (actual_class_name); |
| 1720 | |
| 1721 | return locate_pdi_sibling (struct_pdi, info_ptr, abfd, cu); |
| 1722 | } |
| 1723 | |
| 1724 | /* Read a partial die corresponding to an enumeration type. */ |
| 1725 | |
| 1726 | static char * |
| 1727 | add_partial_enumeration (struct partial_die_info *enum_pdi, char *info_ptr, |
| 1728 | struct dwarf2_cu *cu, const char *namespace) |
| 1729 | { |
| 1730 | struct objfile *objfile = cu->objfile; |
| 1731 | bfd *abfd = objfile->obfd; |
| 1732 | struct partial_die_info pdi; |
| 1733 | |
| 1734 | if (enum_pdi->name != NULL) |
| 1735 | add_partial_symbol (enum_pdi, cu, namespace); |
| 1736 | |
| 1737 | while (1) |
| 1738 | { |
| 1739 | info_ptr = read_partial_die (&pdi, abfd, info_ptr, cu); |
| 1740 | if (pdi.tag == 0) |
| 1741 | break; |
| 1742 | if (pdi.tag != DW_TAG_enumerator || pdi.name == NULL) |
| 1743 | complaint (&symfile_complaints, "malformed enumerator DIE ignored"); |
| 1744 | else |
| 1745 | add_partial_symbol (&pdi, cu, namespace); |
| 1746 | } |
| 1747 | |
| 1748 | return info_ptr; |
| 1749 | } |
| 1750 | |
| 1751 | /* Locate ORIG_PDI's sibling; INFO_PTR should point to the next DIE |
| 1752 | after ORIG_PDI. */ |
| 1753 | |
| 1754 | static char * |
| 1755 | locate_pdi_sibling (struct partial_die_info *orig_pdi, char *info_ptr, |
| 1756 | bfd *abfd, struct dwarf2_cu *cu) |
| 1757 | { |
| 1758 | /* Do we know the sibling already? */ |
| 1759 | |
| 1760 | if (orig_pdi->sibling) |
| 1761 | return orig_pdi->sibling; |
| 1762 | |
| 1763 | /* Are there any children to deal with? */ |
| 1764 | |
| 1765 | if (!orig_pdi->has_children) |
| 1766 | return info_ptr; |
| 1767 | |
| 1768 | /* Okay, we don't know the sibling, but we have children that we |
| 1769 | want to skip. So read children until we run into one without a |
| 1770 | tag; return whatever follows it. */ |
| 1771 | |
| 1772 | while (1) |
| 1773 | { |
| 1774 | struct partial_die_info pdi; |
| 1775 | |
| 1776 | info_ptr = read_partial_die (&pdi, abfd, info_ptr, cu); |
| 1777 | |
| 1778 | if (pdi.tag == 0) |
| 1779 | return info_ptr; |
| 1780 | else |
| 1781 | info_ptr = locate_pdi_sibling (&pdi, info_ptr, abfd, cu); |
| 1782 | } |
| 1783 | } |
| 1784 | |
| 1785 | /* Expand this partial symbol table into a full symbol table. */ |
| 1786 | |
| 1787 | static void |
| 1788 | dwarf2_psymtab_to_symtab (struct partial_symtab *pst) |
| 1789 | { |
| 1790 | /* FIXME: This is barely more than a stub. */ |
| 1791 | if (pst != NULL) |
| 1792 | { |
| 1793 | if (pst->readin) |
| 1794 | { |
| 1795 | warning ("bug: psymtab for %s is already read in.", pst->filename); |
| 1796 | } |
| 1797 | else |
| 1798 | { |
| 1799 | if (info_verbose) |
| 1800 | { |
| 1801 | printf_filtered ("Reading in symbols for %s...", pst->filename); |
| 1802 | gdb_flush (gdb_stdout); |
| 1803 | } |
| 1804 | |
| 1805 | psymtab_to_symtab_1 (pst); |
| 1806 | |
| 1807 | /* Finish up the debug error message. */ |
| 1808 | if (info_verbose) |
| 1809 | printf_filtered ("done.\n"); |
| 1810 | } |
| 1811 | } |
| 1812 | } |
| 1813 | |
| 1814 | static void |
| 1815 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
| 1816 | { |
| 1817 | struct objfile *objfile = pst->objfile; |
| 1818 | bfd *abfd = objfile->obfd; |
| 1819 | struct dwarf2_cu cu; |
| 1820 | struct die_info *dies; |
| 1821 | unsigned long offset; |
| 1822 | CORE_ADDR lowpc, highpc; |
| 1823 | struct die_info *child_die; |
| 1824 | char *info_ptr; |
| 1825 | struct symtab *symtab; |
| 1826 | struct cleanup *back_to; |
| 1827 | struct attribute *attr; |
| 1828 | CORE_ADDR baseaddr; |
| 1829 | |
| 1830 | /* Set local variables from the partial symbol table info. */ |
| 1831 | offset = DWARF_INFO_OFFSET (pst); |
| 1832 | dwarf_info_buffer = DWARF_INFO_BUFFER (pst); |
| 1833 | dwarf_abbrev_buffer = DWARF_ABBREV_BUFFER (pst); |
| 1834 | dwarf_abbrev_size = DWARF_ABBREV_SIZE (pst); |
| 1835 | dwarf_line_buffer = DWARF_LINE_BUFFER (pst); |
| 1836 | dwarf_line_size = DWARF_LINE_SIZE (pst); |
| 1837 | dwarf_str_buffer = DWARF_STR_BUFFER (pst); |
| 1838 | dwarf_str_size = DWARF_STR_SIZE (pst); |
| 1839 | dwarf_macinfo_buffer = DWARF_MACINFO_BUFFER (pst); |
| 1840 | dwarf_macinfo_size = DWARF_MACINFO_SIZE (pst); |
| 1841 | dwarf_ranges_buffer = DWARF_RANGES_BUFFER (pst); |
| 1842 | dwarf_ranges_size = DWARF_RANGES_SIZE (pst); |
| 1843 | dwarf_loc_buffer = DWARF_LOC_BUFFER (pst); |
| 1844 | dwarf_loc_size = DWARF_LOC_SIZE (pst); |
| 1845 | info_ptr = dwarf_info_buffer + offset; |
| 1846 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 1847 | |
| 1848 | /* We're in the global namespace. */ |
| 1849 | processing_current_prefix = ""; |
| 1850 | |
| 1851 | obstack_init (&dwarf2_tmp_obstack); |
| 1852 | back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL); |
| 1853 | |
| 1854 | buildsym_init (); |
| 1855 | make_cleanup (really_free_pendings, NULL); |
| 1856 | |
| 1857 | cu.objfile = objfile; |
| 1858 | |
| 1859 | /* read in the comp_unit header */ |
| 1860 | info_ptr = read_comp_unit_head (&cu.header, info_ptr, abfd); |
| 1861 | |
| 1862 | /* Read the abbrevs for this compilation unit */ |
| 1863 | dwarf2_read_abbrevs (abfd, &cu); |
| 1864 | make_cleanup (dwarf2_empty_abbrev_table, cu.header.dwarf2_abbrevs); |
| 1865 | |
| 1866 | cu.header.offset = offset; |
| 1867 | |
| 1868 | cu.list_in_scope = &file_symbols; |
| 1869 | |
| 1870 | dies = read_comp_unit (info_ptr, abfd, &cu); |
| 1871 | |
| 1872 | make_cleanup_free_die_list (dies); |
| 1873 | |
| 1874 | /* Find the base address of the compilation unit for range lists and |
| 1875 | location lists. It will normally be specified by DW_AT_low_pc. |
| 1876 | In DWARF-3 draft 4, the base address could be overridden by |
| 1877 | DW_AT_entry_pc. It's been removed, but GCC still uses this for |
| 1878 | compilation units with discontinuous ranges. */ |
| 1879 | |
| 1880 | cu.header.base_known = 0; |
| 1881 | cu.header.base_address = 0; |
| 1882 | |
| 1883 | attr = dwarf2_attr (dies, DW_AT_entry_pc, &cu); |
| 1884 | if (attr) |
| 1885 | { |
| 1886 | cu.header.base_address = DW_ADDR (attr); |
| 1887 | cu.header.base_known = 1; |
| 1888 | } |
| 1889 | else |
| 1890 | { |
| 1891 | attr = dwarf2_attr (dies, DW_AT_low_pc, &cu); |
| 1892 | if (attr) |
| 1893 | { |
| 1894 | cu.header.base_address = DW_ADDR (attr); |
| 1895 | cu.header.base_known = 1; |
| 1896 | } |
| 1897 | } |
| 1898 | |
| 1899 | /* Do line number decoding in read_file_scope () */ |
| 1900 | process_die (dies, &cu); |
| 1901 | |
| 1902 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
| 1903 | compilation unit. If the DW_AT_high_pc is missing, synthesize |
| 1904 | it, by scanning the DIE's below the compilation unit. */ |
| 1905 | get_scope_pc_bounds (dies, &lowpc, &highpc, &cu); |
| 1906 | |
| 1907 | symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile)); |
| 1908 | |
| 1909 | /* Set symtab language to language from DW_AT_language. |
| 1910 | If the compilation is from a C file generated by language preprocessors, |
| 1911 | do not set the language if it was already deduced by start_subfile. */ |
| 1912 | if (symtab != NULL |
| 1913 | && !(cu.language == language_c && symtab->language != language_c)) |
| 1914 | { |
| 1915 | symtab->language = cu.language; |
| 1916 | } |
| 1917 | pst->symtab = symtab; |
| 1918 | pst->readin = 1; |
| 1919 | |
| 1920 | do_cleanups (back_to); |
| 1921 | } |
| 1922 | |
| 1923 | /* Process a die and its children. */ |
| 1924 | |
| 1925 | static void |
| 1926 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
| 1927 | { |
| 1928 | switch (die->tag) |
| 1929 | { |
| 1930 | case DW_TAG_padding: |
| 1931 | break; |
| 1932 | case DW_TAG_compile_unit: |
| 1933 | read_file_scope (die, cu); |
| 1934 | break; |
| 1935 | case DW_TAG_subprogram: |
| 1936 | read_subroutine_type (die, cu); |
| 1937 | read_func_scope (die, cu); |
| 1938 | break; |
| 1939 | case DW_TAG_inlined_subroutine: |
| 1940 | /* FIXME: These are ignored for now. |
| 1941 | They could be used to set breakpoints on all inlined instances |
| 1942 | of a function and make GDB `next' properly over inlined functions. */ |
| 1943 | break; |
| 1944 | case DW_TAG_lexical_block: |
| 1945 | case DW_TAG_try_block: |
| 1946 | case DW_TAG_catch_block: |
| 1947 | read_lexical_block_scope (die, cu); |
| 1948 | break; |
| 1949 | case DW_TAG_class_type: |
| 1950 | case DW_TAG_structure_type: |
| 1951 | case DW_TAG_union_type: |
| 1952 | read_structure_scope (die, cu); |
| 1953 | break; |
| 1954 | case DW_TAG_enumeration_type: |
| 1955 | read_enumeration (die, cu); |
| 1956 | break; |
| 1957 | case DW_TAG_subroutine_type: |
| 1958 | read_subroutine_type (die, cu); |
| 1959 | break; |
| 1960 | case DW_TAG_array_type: |
| 1961 | read_array_type (die, cu); |
| 1962 | break; |
| 1963 | case DW_TAG_pointer_type: |
| 1964 | read_tag_pointer_type (die, cu); |
| 1965 | break; |
| 1966 | case DW_TAG_ptr_to_member_type: |
| 1967 | read_tag_ptr_to_member_type (die, cu); |
| 1968 | break; |
| 1969 | case DW_TAG_reference_type: |
| 1970 | read_tag_reference_type (die, cu); |
| 1971 | break; |
| 1972 | case DW_TAG_string_type: |
| 1973 | read_tag_string_type (die, cu); |
| 1974 | break; |
| 1975 | case DW_TAG_base_type: |
| 1976 | read_base_type (die, cu); |
| 1977 | if (dwarf2_attr (die, DW_AT_name, cu)) |
| 1978 | { |
| 1979 | /* Add a typedef symbol for the base type definition. */ |
| 1980 | new_symbol (die, die->type, cu); |
| 1981 | } |
| 1982 | break; |
| 1983 | case DW_TAG_subrange_type: |
| 1984 | read_subrange_type (die, cu); |
| 1985 | if (dwarf2_attr (die, DW_AT_name, cu)) |
| 1986 | { |
| 1987 | /* Add a typedef symbol for the base type definition. */ |
| 1988 | new_symbol (die, die->type, cu); |
| 1989 | } |
| 1990 | break; |
| 1991 | case DW_TAG_common_block: |
| 1992 | read_common_block (die, cu); |
| 1993 | break; |
| 1994 | case DW_TAG_common_inclusion: |
| 1995 | break; |
| 1996 | case DW_TAG_namespace: |
| 1997 | processing_has_namespace_info = 1; |
| 1998 | read_namespace (die, cu); |
| 1999 | break; |
| 2000 | case DW_TAG_imported_declaration: |
| 2001 | case DW_TAG_imported_module: |
| 2002 | /* FIXME: carlton/2002-10-16: Eventually, we should use the |
| 2003 | information contained in these. DW_TAG_imported_declaration |
| 2004 | dies shouldn't have children; DW_TAG_imported_module dies |
| 2005 | shouldn't in the C++ case, but conceivably could in the |
| 2006 | Fortran case, so we'll have to replace this gdb_assert if |
| 2007 | Fortran compilers start generating that info. */ |
| 2008 | processing_has_namespace_info = 1; |
| 2009 | gdb_assert (die->child == NULL); |
| 2010 | break; |
| 2011 | default: |
| 2012 | new_symbol (die, NULL, cu); |
| 2013 | break; |
| 2014 | } |
| 2015 | } |
| 2016 | |
| 2017 | static void |
| 2018 | initialize_cu_func_list (struct dwarf2_cu *cu) |
| 2019 | { |
| 2020 | cu->first_fn = cu->last_fn = cu->cached_fn = NULL; |
| 2021 | } |
| 2022 | |
| 2023 | static void |
| 2024 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 2025 | { |
| 2026 | struct objfile *objfile = cu->objfile; |
| 2027 | struct comp_unit_head *cu_header = &cu->header; |
| 2028 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
| 2029 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
| 2030 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
| 2031 | struct attribute *attr; |
| 2032 | char *name = "<unknown>"; |
| 2033 | char *comp_dir = NULL; |
| 2034 | struct die_info *child_die; |
| 2035 | bfd *abfd = objfile->obfd; |
| 2036 | struct line_header *line_header = 0; |
| 2037 | CORE_ADDR baseaddr; |
| 2038 | |
| 2039 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 2040 | |
| 2041 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
| 2042 | |
| 2043 | /* If we didn't find a lowpc, set it to highpc to avoid complaints |
| 2044 | from finish_block. */ |
| 2045 | if (lowpc == ((CORE_ADDR) -1)) |
| 2046 | lowpc = highpc; |
| 2047 | lowpc += baseaddr; |
| 2048 | highpc += baseaddr; |
| 2049 | |
| 2050 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 2051 | if (attr) |
| 2052 | { |
| 2053 | name = DW_STRING (attr); |
| 2054 | } |
| 2055 | attr = dwarf2_attr (die, DW_AT_comp_dir, cu); |
| 2056 | if (attr) |
| 2057 | { |
| 2058 | comp_dir = DW_STRING (attr); |
| 2059 | if (comp_dir) |
| 2060 | { |
| 2061 | /* Irix 6.2 native cc prepends <machine>.: to the compilation |
| 2062 | directory, get rid of it. */ |
| 2063 | char *cp = strchr (comp_dir, ':'); |
| 2064 | |
| 2065 | if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/') |
| 2066 | comp_dir = cp + 1; |
| 2067 | } |
| 2068 | } |
| 2069 | |
| 2070 | if (objfile->ei.entry_point >= lowpc && |
| 2071 | objfile->ei.entry_point < highpc) |
| 2072 | { |
| 2073 | objfile->ei.deprecated_entry_file_lowpc = lowpc; |
| 2074 | objfile->ei.deprecated_entry_file_highpc = highpc; |
| 2075 | } |
| 2076 | |
| 2077 | attr = dwarf2_attr (die, DW_AT_language, cu); |
| 2078 | if (attr) |
| 2079 | { |
| 2080 | set_cu_language (DW_UNSND (attr), cu); |
| 2081 | } |
| 2082 | |
| 2083 | /* We assume that we're processing GCC output. */ |
| 2084 | processing_gcc_compilation = 2; |
| 2085 | #if 0 |
| 2086 | /* FIXME:Do something here. */ |
| 2087 | if (dip->at_producer != NULL) |
| 2088 | { |
| 2089 | handle_producer (dip->at_producer); |
| 2090 | } |
| 2091 | #endif |
| 2092 | |
| 2093 | /* The compilation unit may be in a different language or objfile, |
| 2094 | zero out all remembered fundamental types. */ |
| 2095 | memset (cu->ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); |
| 2096 | |
| 2097 | start_symtab (name, comp_dir, lowpc); |
| 2098 | record_debugformat ("DWARF 2"); |
| 2099 | |
| 2100 | initialize_cu_func_list (cu); |
| 2101 | |
| 2102 | /* Process all dies in compilation unit. */ |
| 2103 | if (die->child != NULL) |
| 2104 | { |
| 2105 | child_die = die->child; |
| 2106 | while (child_die && child_die->tag) |
| 2107 | { |
| 2108 | process_die (child_die, cu); |
| 2109 | child_die = sibling_die (child_die); |
| 2110 | } |
| 2111 | } |
| 2112 | |
| 2113 | /* Decode line number information if present. */ |
| 2114 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
| 2115 | if (attr) |
| 2116 | { |
| 2117 | unsigned int line_offset = DW_UNSND (attr); |
| 2118 | line_header = dwarf_decode_line_header (line_offset, abfd, cu); |
| 2119 | if (line_header) |
| 2120 | { |
| 2121 | make_cleanup ((make_cleanup_ftype *) free_line_header, |
| 2122 | (void *) line_header); |
| 2123 | dwarf_decode_lines (line_header, comp_dir, abfd, cu); |
| 2124 | } |
| 2125 | } |
| 2126 | |
| 2127 | /* Decode macro information, if present. Dwarf 2 macro information |
| 2128 | refers to information in the line number info statement program |
| 2129 | header, so we can only read it if we've read the header |
| 2130 | successfully. */ |
| 2131 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); |
| 2132 | if (attr && line_header) |
| 2133 | { |
| 2134 | unsigned int macro_offset = DW_UNSND (attr); |
| 2135 | dwarf_decode_macros (line_header, macro_offset, |
| 2136 | comp_dir, abfd, cu); |
| 2137 | } |
| 2138 | do_cleanups (back_to); |
| 2139 | } |
| 2140 | |
| 2141 | static void |
| 2142 | add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc, |
| 2143 | struct dwarf2_cu *cu) |
| 2144 | { |
| 2145 | struct function_range *thisfn; |
| 2146 | |
| 2147 | thisfn = (struct function_range *) |
| 2148 | obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct function_range)); |
| 2149 | thisfn->name = name; |
| 2150 | thisfn->lowpc = lowpc; |
| 2151 | thisfn->highpc = highpc; |
| 2152 | thisfn->seen_line = 0; |
| 2153 | thisfn->next = NULL; |
| 2154 | |
| 2155 | if (cu->last_fn == NULL) |
| 2156 | cu->first_fn = thisfn; |
| 2157 | else |
| 2158 | cu->last_fn->next = thisfn; |
| 2159 | |
| 2160 | cu->last_fn = thisfn; |
| 2161 | } |
| 2162 | |
| 2163 | static void |
| 2164 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 2165 | { |
| 2166 | struct objfile *objfile = cu->objfile; |
| 2167 | struct context_stack *new; |
| 2168 | CORE_ADDR lowpc; |
| 2169 | CORE_ADDR highpc; |
| 2170 | struct die_info *child_die; |
| 2171 | struct attribute *attr; |
| 2172 | char *name; |
| 2173 | const char *previous_prefix = processing_current_prefix; |
| 2174 | struct cleanup *back_to = NULL; |
| 2175 | CORE_ADDR baseaddr; |
| 2176 | |
| 2177 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 2178 | |
| 2179 | name = dwarf2_linkage_name (die, cu); |
| 2180 | |
| 2181 | /* Ignore functions with missing or empty names and functions with |
| 2182 | missing or invalid low and high pc attributes. */ |
| 2183 | if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu)) |
| 2184 | return; |
| 2185 | |
| 2186 | if (cu->language == language_cplus) |
| 2187 | { |
| 2188 | struct die_info *spec_die = die_specification (die, cu); |
| 2189 | |
| 2190 | /* NOTE: carlton/2004-01-23: We have to be careful in the |
| 2191 | presence of DW_AT_specification. For example, with GCC 3.4, |
| 2192 | given the code |
| 2193 | |
| 2194 | namespace N { |
| 2195 | void foo() { |
| 2196 | // Definition of N::foo. |
| 2197 | } |
| 2198 | } |
| 2199 | |
| 2200 | then we'll have a tree of DIEs like this: |
| 2201 | |
| 2202 | 1: DW_TAG_compile_unit |
| 2203 | 2: DW_TAG_namespace // N |
| 2204 | 3: DW_TAG_subprogram // declaration of N::foo |
| 2205 | 4: DW_TAG_subprogram // definition of N::foo |
| 2206 | DW_AT_specification // refers to die #3 |
| 2207 | |
| 2208 | Thus, when processing die #4, we have to pretend that we're |
| 2209 | in the context of its DW_AT_specification, namely the contex |
| 2210 | of die #3. */ |
| 2211 | |
| 2212 | if (spec_die != NULL) |
| 2213 | { |
| 2214 | char *specification_prefix = determine_prefix (spec_die, cu); |
| 2215 | processing_current_prefix = specification_prefix; |
| 2216 | back_to = make_cleanup (xfree, specification_prefix); |
| 2217 | } |
| 2218 | } |
| 2219 | |
| 2220 | lowpc += baseaddr; |
| 2221 | highpc += baseaddr; |
| 2222 | |
| 2223 | /* Record the function range for dwarf_decode_lines. */ |
| 2224 | add_to_cu_func_list (name, lowpc, highpc, cu); |
| 2225 | |
| 2226 | if (objfile->ei.entry_point >= lowpc && |
| 2227 | objfile->ei.entry_point < highpc) |
| 2228 | { |
| 2229 | objfile->ei.entry_func_lowpc = lowpc; |
| 2230 | objfile->ei.entry_func_highpc = highpc; |
| 2231 | } |
| 2232 | |
| 2233 | new = push_context (0, lowpc); |
| 2234 | new->name = new_symbol (die, die->type, cu); |
| 2235 | |
| 2236 | /* If there is a location expression for DW_AT_frame_base, record |
| 2237 | it. */ |
| 2238 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
| 2239 | if (attr) |
| 2240 | /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location |
| 2241 | expression is being recorded directly in the function's symbol |
| 2242 | and not in a separate frame-base object. I guess this hack is |
| 2243 | to avoid adding some sort of frame-base adjunct/annex to the |
| 2244 | function's symbol :-(. The problem with doing this is that it |
| 2245 | results in a function symbol with a location expression that |
| 2246 | has nothing to do with the location of the function, ouch! The |
| 2247 | relationship should be: a function's symbol has-a frame base; a |
| 2248 | frame-base has-a location expression. */ |
| 2249 | dwarf2_symbol_mark_computed (attr, new->name, cu); |
| 2250 | |
| 2251 | cu->list_in_scope = &local_symbols; |
| 2252 | |
| 2253 | if (die->child != NULL) |
| 2254 | { |
| 2255 | child_die = die->child; |
| 2256 | while (child_die && child_die->tag) |
| 2257 | { |
| 2258 | process_die (child_die, cu); |
| 2259 | child_die = sibling_die (child_die); |
| 2260 | } |
| 2261 | } |
| 2262 | |
| 2263 | new = pop_context (); |
| 2264 | /* Make a block for the local symbols within. */ |
| 2265 | finish_block (new->name, &local_symbols, new->old_blocks, |
| 2266 | lowpc, highpc, objfile); |
| 2267 | |
| 2268 | /* In C++, we can have functions nested inside functions (e.g., when |
| 2269 | a function declares a class that has methods). This means that |
| 2270 | when we finish processing a function scope, we may need to go |
| 2271 | back to building a containing block's symbol lists. */ |
| 2272 | local_symbols = new->locals; |
| 2273 | param_symbols = new->params; |
| 2274 | |
| 2275 | /* If we've finished processing a top-level function, subsequent |
| 2276 | symbols go in the file symbol list. */ |
| 2277 | if (outermost_context_p ()) |
| 2278 | cu->list_in_scope = &file_symbols; |
| 2279 | |
| 2280 | processing_current_prefix = previous_prefix; |
| 2281 | if (back_to != NULL) |
| 2282 | do_cleanups (back_to); |
| 2283 | } |
| 2284 | |
| 2285 | /* Process all the DIES contained within a lexical block scope. Start |
| 2286 | a new scope, process the dies, and then close the scope. */ |
| 2287 | |
| 2288 | static void |
| 2289 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 2290 | { |
| 2291 | struct objfile *objfile = cu->objfile; |
| 2292 | struct context_stack *new; |
| 2293 | CORE_ADDR lowpc, highpc; |
| 2294 | struct die_info *child_die; |
| 2295 | CORE_ADDR baseaddr; |
| 2296 | |
| 2297 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 2298 | |
| 2299 | /* Ignore blocks with missing or invalid low and high pc attributes. */ |
| 2300 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
| 2301 | as multiple lexical blocks? Handling children in a sane way would |
| 2302 | be nasty. Might be easier to properly extend generic blocks to |
| 2303 | describe ranges. */ |
| 2304 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu)) |
| 2305 | return; |
| 2306 | lowpc += baseaddr; |
| 2307 | highpc += baseaddr; |
| 2308 | |
| 2309 | push_context (0, lowpc); |
| 2310 | if (die->child != NULL) |
| 2311 | { |
| 2312 | child_die = die->child; |
| 2313 | while (child_die && child_die->tag) |
| 2314 | { |
| 2315 | process_die (child_die, cu); |
| 2316 | child_die = sibling_die (child_die); |
| 2317 | } |
| 2318 | } |
| 2319 | new = pop_context (); |
| 2320 | |
| 2321 | if (local_symbols != NULL) |
| 2322 | { |
| 2323 | finish_block (0, &local_symbols, new->old_blocks, new->start_addr, |
| 2324 | highpc, objfile); |
| 2325 | } |
| 2326 | local_symbols = new->locals; |
| 2327 | } |
| 2328 | |
| 2329 | /* Get low and high pc attributes from a die. Return 1 if the attributes |
| 2330 | are present and valid, otherwise, return 0. Return -1 if the range is |
| 2331 | discontinuous, i.e. derived from DW_AT_ranges information. */ |
| 2332 | static int |
| 2333 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
| 2334 | CORE_ADDR *highpc, struct dwarf2_cu *cu) |
| 2335 | { |
| 2336 | struct objfile *objfile = cu->objfile; |
| 2337 | struct comp_unit_head *cu_header = &cu->header; |
| 2338 | struct attribute *attr; |
| 2339 | bfd *obfd = objfile->obfd; |
| 2340 | CORE_ADDR low = 0; |
| 2341 | CORE_ADDR high = 0; |
| 2342 | int ret = 0; |
| 2343 | |
| 2344 | attr = dwarf2_attr (die, DW_AT_high_pc, cu); |
| 2345 | if (attr) |
| 2346 | { |
| 2347 | high = DW_ADDR (attr); |
| 2348 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
| 2349 | if (attr) |
| 2350 | low = DW_ADDR (attr); |
| 2351 | else |
| 2352 | /* Found high w/o low attribute. */ |
| 2353 | return 0; |
| 2354 | |
| 2355 | /* Found consecutive range of addresses. */ |
| 2356 | ret = 1; |
| 2357 | } |
| 2358 | else |
| 2359 | { |
| 2360 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
| 2361 | if (attr != NULL) |
| 2362 | { |
| 2363 | unsigned int addr_size = cu_header->addr_size; |
| 2364 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); |
| 2365 | /* Value of the DW_AT_ranges attribute is the offset in the |
| 2366 | .debug_ranges section. */ |
| 2367 | unsigned int offset = DW_UNSND (attr); |
| 2368 | /* Base address selection entry. */ |
| 2369 | CORE_ADDR base; |
| 2370 | int found_base; |
| 2371 | int dummy; |
| 2372 | char *buffer; |
| 2373 | CORE_ADDR marker; |
| 2374 | int low_set; |
| 2375 | |
| 2376 | found_base = cu_header->base_known; |
| 2377 | base = cu_header->base_address; |
| 2378 | |
| 2379 | if (offset >= dwarf_ranges_size) |
| 2380 | { |
| 2381 | complaint (&symfile_complaints, |
| 2382 | "Offset %d out of bounds for DW_AT_ranges attribute", |
| 2383 | offset); |
| 2384 | return 0; |
| 2385 | } |
| 2386 | buffer = dwarf_ranges_buffer + offset; |
| 2387 | |
| 2388 | /* Read in the largest possible address. */ |
| 2389 | marker = read_address (obfd, buffer, cu, &dummy); |
| 2390 | if ((marker & mask) == mask) |
| 2391 | { |
| 2392 | /* If we found the largest possible address, then |
| 2393 | read the base address. */ |
| 2394 | base = read_address (obfd, buffer + addr_size, cu, &dummy); |
| 2395 | buffer += 2 * addr_size; |
| 2396 | offset += 2 * addr_size; |
| 2397 | found_base = 1; |
| 2398 | } |
| 2399 | |
| 2400 | low_set = 0; |
| 2401 | |
| 2402 | while (1) |
| 2403 | { |
| 2404 | CORE_ADDR range_beginning, range_end; |
| 2405 | |
| 2406 | range_beginning = read_address (obfd, buffer, cu, &dummy); |
| 2407 | buffer += addr_size; |
| 2408 | range_end = read_address (obfd, buffer, cu, &dummy); |
| 2409 | buffer += addr_size; |
| 2410 | offset += 2 * addr_size; |
| 2411 | |
| 2412 | /* An end of list marker is a pair of zero addresses. */ |
| 2413 | if (range_beginning == 0 && range_end == 0) |
| 2414 | /* Found the end of list entry. */ |
| 2415 | break; |
| 2416 | |
| 2417 | /* Each base address selection entry is a pair of 2 values. |
| 2418 | The first is the largest possible address, the second is |
| 2419 | the base address. Check for a base address here. */ |
| 2420 | if ((range_beginning & mask) == mask) |
| 2421 | { |
| 2422 | /* If we found the largest possible address, then |
| 2423 | read the base address. */ |
| 2424 | base = read_address (obfd, buffer + addr_size, cu, &dummy); |
| 2425 | found_base = 1; |
| 2426 | continue; |
| 2427 | } |
| 2428 | |
| 2429 | if (!found_base) |
| 2430 | { |
| 2431 | /* We have no valid base address for the ranges |
| 2432 | data. */ |
| 2433 | complaint (&symfile_complaints, |
| 2434 | "Invalid .debug_ranges data (no base address)"); |
| 2435 | return 0; |
| 2436 | } |
| 2437 | |
| 2438 | range_beginning += base; |
| 2439 | range_end += base; |
| 2440 | |
| 2441 | /* FIXME: This is recording everything as a low-high |
| 2442 | segment of consecutive addresses. We should have a |
| 2443 | data structure for discontiguous block ranges |
| 2444 | instead. */ |
| 2445 | if (! low_set) |
| 2446 | { |
| 2447 | low = range_beginning; |
| 2448 | high = range_end; |
| 2449 | low_set = 1; |
| 2450 | } |
| 2451 | else |
| 2452 | { |
| 2453 | if (range_beginning < low) |
| 2454 | low = range_beginning; |
| 2455 | if (range_end > high) |
| 2456 | high = range_end; |
| 2457 | } |
| 2458 | } |
| 2459 | |
| 2460 | if (! low_set) |
| 2461 | /* If the first entry is an end-of-list marker, the range |
| 2462 | describes an empty scope, i.e. no instructions. */ |
| 2463 | return 0; |
| 2464 | |
| 2465 | ret = -1; |
| 2466 | } |
| 2467 | } |
| 2468 | |
| 2469 | if (high < low) |
| 2470 | return 0; |
| 2471 | |
| 2472 | /* When using the GNU linker, .gnu.linkonce. sections are used to |
| 2473 | eliminate duplicate copies of functions and vtables and such. |
| 2474 | The linker will arbitrarily choose one and discard the others. |
| 2475 | The AT_*_pc values for such functions refer to local labels in |
| 2476 | these sections. If the section from that file was discarded, the |
| 2477 | labels are not in the output, so the relocs get a value of 0. |
| 2478 | If this is a discarded function, mark the pc bounds as invalid, |
| 2479 | so that GDB will ignore it. */ |
| 2480 | if (low == 0 && (bfd_get_file_flags (obfd) & HAS_RELOC) == 0) |
| 2481 | return 0; |
| 2482 | |
| 2483 | *lowpc = low; |
| 2484 | *highpc = high; |
| 2485 | return ret; |
| 2486 | } |
| 2487 | |
| 2488 | /* Get the low and high pc's represented by the scope DIE, and store |
| 2489 | them in *LOWPC and *HIGHPC. If the correct values can't be |
| 2490 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ |
| 2491 | |
| 2492 | static void |
| 2493 | get_scope_pc_bounds (struct die_info *die, |
| 2494 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 2495 | struct dwarf2_cu *cu) |
| 2496 | { |
| 2497 | CORE_ADDR best_low = (CORE_ADDR) -1; |
| 2498 | CORE_ADDR best_high = (CORE_ADDR) 0; |
| 2499 | CORE_ADDR current_low, current_high; |
| 2500 | |
| 2501 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu)) |
| 2502 | { |
| 2503 | best_low = current_low; |
| 2504 | best_high = current_high; |
| 2505 | } |
| 2506 | else |
| 2507 | { |
| 2508 | struct die_info *child = die->child; |
| 2509 | |
| 2510 | while (child && child->tag) |
| 2511 | { |
| 2512 | switch (child->tag) { |
| 2513 | case DW_TAG_subprogram: |
| 2514 | if (dwarf2_get_pc_bounds (child, ¤t_low, ¤t_high, cu)) |
| 2515 | { |
| 2516 | best_low = min (best_low, current_low); |
| 2517 | best_high = max (best_high, current_high); |
| 2518 | } |
| 2519 | break; |
| 2520 | case DW_TAG_namespace: |
| 2521 | /* FIXME: carlton/2004-01-16: Should we do this for |
| 2522 | DW_TAG_class_type/DW_TAG_structure_type, too? I think |
| 2523 | that current GCC's always emit the DIEs corresponding |
| 2524 | to definitions of methods of classes as children of a |
| 2525 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to |
| 2526 | the DIEs giving the declarations, which could be |
| 2527 | anywhere). But I don't see any reason why the |
| 2528 | standards says that they have to be there. */ |
| 2529 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); |
| 2530 | |
| 2531 | if (current_low != ((CORE_ADDR) -1)) |
| 2532 | { |
| 2533 | best_low = min (best_low, current_low); |
| 2534 | best_high = max (best_high, current_high); |
| 2535 | } |
| 2536 | break; |
| 2537 | default: |
| 2538 | /* Ignore. */ |
| 2539 | break; |
| 2540 | } |
| 2541 | |
| 2542 | child = sibling_die (child); |
| 2543 | } |
| 2544 | } |
| 2545 | |
| 2546 | *lowpc = best_low; |
| 2547 | *highpc = best_high; |
| 2548 | } |
| 2549 | |
| 2550 | /* Add an aggregate field to the field list. */ |
| 2551 | |
| 2552 | static void |
| 2553 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
| 2554 | struct dwarf2_cu *cu) |
| 2555 | { |
| 2556 | struct objfile *objfile = cu->objfile; |
| 2557 | struct nextfield *new_field; |
| 2558 | struct attribute *attr; |
| 2559 | struct field *fp; |
| 2560 | char *fieldname = ""; |
| 2561 | |
| 2562 | /* Allocate a new field list entry and link it in. */ |
| 2563 | new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); |
| 2564 | make_cleanup (xfree, new_field); |
| 2565 | memset (new_field, 0, sizeof (struct nextfield)); |
| 2566 | new_field->next = fip->fields; |
| 2567 | fip->fields = new_field; |
| 2568 | fip->nfields++; |
| 2569 | |
| 2570 | /* Handle accessibility and virtuality of field. |
| 2571 | The default accessibility for members is public, the default |
| 2572 | accessibility for inheritance is private. */ |
| 2573 | if (die->tag != DW_TAG_inheritance) |
| 2574 | new_field->accessibility = DW_ACCESS_public; |
| 2575 | else |
| 2576 | new_field->accessibility = DW_ACCESS_private; |
| 2577 | new_field->virtuality = DW_VIRTUALITY_none; |
| 2578 | |
| 2579 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
| 2580 | if (attr) |
| 2581 | new_field->accessibility = DW_UNSND (attr); |
| 2582 | if (new_field->accessibility != DW_ACCESS_public) |
| 2583 | fip->non_public_fields = 1; |
| 2584 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
| 2585 | if (attr) |
| 2586 | new_field->virtuality = DW_UNSND (attr); |
| 2587 | |
| 2588 | fp = &new_field->field; |
| 2589 | |
| 2590 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
| 2591 | { |
| 2592 | /* Data member other than a C++ static data member. */ |
| 2593 | |
| 2594 | /* Get type of field. */ |
| 2595 | fp->type = die_type (die, cu); |
| 2596 | |
| 2597 | FIELD_STATIC_KIND (*fp) = 0; |
| 2598 | |
| 2599 | /* Get bit size of field (zero if none). */ |
| 2600 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
| 2601 | if (attr) |
| 2602 | { |
| 2603 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); |
| 2604 | } |
| 2605 | else |
| 2606 | { |
| 2607 | FIELD_BITSIZE (*fp) = 0; |
| 2608 | } |
| 2609 | |
| 2610 | /* Get bit offset of field. */ |
| 2611 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); |
| 2612 | if (attr) |
| 2613 | { |
| 2614 | FIELD_BITPOS (*fp) = |
| 2615 | decode_locdesc (DW_BLOCK (attr), cu) * bits_per_byte; |
| 2616 | } |
| 2617 | else |
| 2618 | FIELD_BITPOS (*fp) = 0; |
| 2619 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
| 2620 | if (attr) |
| 2621 | { |
| 2622 | if (BITS_BIG_ENDIAN) |
| 2623 | { |
| 2624 | /* For big endian bits, the DW_AT_bit_offset gives the |
| 2625 | additional bit offset from the MSB of the containing |
| 2626 | anonymous object to the MSB of the field. We don't |
| 2627 | have to do anything special since we don't need to |
| 2628 | know the size of the anonymous object. */ |
| 2629 | FIELD_BITPOS (*fp) += DW_UNSND (attr); |
| 2630 | } |
| 2631 | else |
| 2632 | { |
| 2633 | /* For little endian bits, compute the bit offset to the |
| 2634 | MSB of the anonymous object, subtract off the number of |
| 2635 | bits from the MSB of the field to the MSB of the |
| 2636 | object, and then subtract off the number of bits of |
| 2637 | the field itself. The result is the bit offset of |
| 2638 | the LSB of the field. */ |
| 2639 | int anonymous_size; |
| 2640 | int bit_offset = DW_UNSND (attr); |
| 2641 | |
| 2642 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 2643 | if (attr) |
| 2644 | { |
| 2645 | /* The size of the anonymous object containing |
| 2646 | the bit field is explicit, so use the |
| 2647 | indicated size (in bytes). */ |
| 2648 | anonymous_size = DW_UNSND (attr); |
| 2649 | } |
| 2650 | else |
| 2651 | { |
| 2652 | /* The size of the anonymous object containing |
| 2653 | the bit field must be inferred from the type |
| 2654 | attribute of the data member containing the |
| 2655 | bit field. */ |
| 2656 | anonymous_size = TYPE_LENGTH (fp->type); |
| 2657 | } |
| 2658 | FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte |
| 2659 | - bit_offset - FIELD_BITSIZE (*fp); |
| 2660 | } |
| 2661 | } |
| 2662 | |
| 2663 | /* Get name of field. */ |
| 2664 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 2665 | if (attr && DW_STRING (attr)) |
| 2666 | fieldname = DW_STRING (attr); |
| 2667 | fp->name = obsavestring (fieldname, strlen (fieldname), |
| 2668 | &objfile->objfile_obstack); |
| 2669 | |
| 2670 | /* Change accessibility for artificial fields (e.g. virtual table |
| 2671 | pointer or virtual base class pointer) to private. */ |
| 2672 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
| 2673 | { |
| 2674 | new_field->accessibility = DW_ACCESS_private; |
| 2675 | fip->non_public_fields = 1; |
| 2676 | } |
| 2677 | } |
| 2678 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
| 2679 | { |
| 2680 | /* C++ static member. */ |
| 2681 | |
| 2682 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that |
| 2683 | is a declaration, but all versions of G++ as of this writing |
| 2684 | (so through at least 3.2.1) incorrectly generate |
| 2685 | DW_TAG_variable tags. */ |
| 2686 | |
| 2687 | char *physname; |
| 2688 | |
| 2689 | /* Get name of field. */ |
| 2690 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 2691 | if (attr && DW_STRING (attr)) |
| 2692 | fieldname = DW_STRING (attr); |
| 2693 | else |
| 2694 | return; |
| 2695 | |
| 2696 | /* Get physical name. */ |
| 2697 | physname = dwarf2_linkage_name (die, cu); |
| 2698 | |
| 2699 | SET_FIELD_PHYSNAME (*fp, obsavestring (physname, strlen (physname), |
| 2700 | &objfile->objfile_obstack)); |
| 2701 | FIELD_TYPE (*fp) = die_type (die, cu); |
| 2702 | FIELD_NAME (*fp) = obsavestring (fieldname, strlen (fieldname), |
| 2703 | &objfile->objfile_obstack); |
| 2704 | } |
| 2705 | else if (die->tag == DW_TAG_inheritance) |
| 2706 | { |
| 2707 | /* C++ base class field. */ |
| 2708 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); |
| 2709 | if (attr) |
| 2710 | FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), cu) |
| 2711 | * bits_per_byte); |
| 2712 | FIELD_BITSIZE (*fp) = 0; |
| 2713 | FIELD_STATIC_KIND (*fp) = 0; |
| 2714 | FIELD_TYPE (*fp) = die_type (die, cu); |
| 2715 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
| 2716 | fip->nbaseclasses++; |
| 2717 | } |
| 2718 | } |
| 2719 | |
| 2720 | /* Create the vector of fields, and attach it to the type. */ |
| 2721 | |
| 2722 | static void |
| 2723 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
| 2724 | struct dwarf2_cu *cu) |
| 2725 | { |
| 2726 | int nfields = fip->nfields; |
| 2727 | |
| 2728 | /* Record the field count, allocate space for the array of fields, |
| 2729 | and create blank accessibility bitfields if necessary. */ |
| 2730 | TYPE_NFIELDS (type) = nfields; |
| 2731 | TYPE_FIELDS (type) = (struct field *) |
| 2732 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
| 2733 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); |
| 2734 | |
| 2735 | if (fip->non_public_fields) |
| 2736 | { |
| 2737 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 2738 | |
| 2739 | TYPE_FIELD_PRIVATE_BITS (type) = |
| 2740 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 2741 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); |
| 2742 | |
| 2743 | TYPE_FIELD_PROTECTED_BITS (type) = |
| 2744 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 2745 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); |
| 2746 | |
| 2747 | TYPE_FIELD_IGNORE_BITS (type) = |
| 2748 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 2749 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); |
| 2750 | } |
| 2751 | |
| 2752 | /* If the type has baseclasses, allocate and clear a bit vector for |
| 2753 | TYPE_FIELD_VIRTUAL_BITS. */ |
| 2754 | if (fip->nbaseclasses) |
| 2755 | { |
| 2756 | int num_bytes = B_BYTES (fip->nbaseclasses); |
| 2757 | char *pointer; |
| 2758 | |
| 2759 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 2760 | pointer = (char *) TYPE_ALLOC (type, num_bytes); |
| 2761 | TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer; |
| 2762 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
| 2763 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; |
| 2764 | } |
| 2765 | |
| 2766 | /* Copy the saved-up fields into the field vector. Start from the head |
| 2767 | of the list, adding to the tail of the field array, so that they end |
| 2768 | up in the same order in the array in which they were added to the list. */ |
| 2769 | while (nfields-- > 0) |
| 2770 | { |
| 2771 | TYPE_FIELD (type, nfields) = fip->fields->field; |
| 2772 | switch (fip->fields->accessibility) |
| 2773 | { |
| 2774 | case DW_ACCESS_private: |
| 2775 | SET_TYPE_FIELD_PRIVATE (type, nfields); |
| 2776 | break; |
| 2777 | |
| 2778 | case DW_ACCESS_protected: |
| 2779 | SET_TYPE_FIELD_PROTECTED (type, nfields); |
| 2780 | break; |
| 2781 | |
| 2782 | case DW_ACCESS_public: |
| 2783 | break; |
| 2784 | |
| 2785 | default: |
| 2786 | /* Unknown accessibility. Complain and treat it as public. */ |
| 2787 | { |
| 2788 | complaint (&symfile_complaints, "unsupported accessibility %d", |
| 2789 | fip->fields->accessibility); |
| 2790 | } |
| 2791 | break; |
| 2792 | } |
| 2793 | if (nfields < fip->nbaseclasses) |
| 2794 | { |
| 2795 | switch (fip->fields->virtuality) |
| 2796 | { |
| 2797 | case DW_VIRTUALITY_virtual: |
| 2798 | case DW_VIRTUALITY_pure_virtual: |
| 2799 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
| 2800 | break; |
| 2801 | } |
| 2802 | } |
| 2803 | fip->fields = fip->fields->next; |
| 2804 | } |
| 2805 | } |
| 2806 | |
| 2807 | /* Add a member function to the proper fieldlist. */ |
| 2808 | |
| 2809 | static void |
| 2810 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
| 2811 | struct type *type, struct dwarf2_cu *cu) |
| 2812 | { |
| 2813 | struct objfile *objfile = cu->objfile; |
| 2814 | struct attribute *attr; |
| 2815 | struct fnfieldlist *flp; |
| 2816 | int i; |
| 2817 | struct fn_field *fnp; |
| 2818 | char *fieldname; |
| 2819 | char *physname; |
| 2820 | struct nextfnfield *new_fnfield; |
| 2821 | |
| 2822 | /* Get name of member function. */ |
| 2823 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 2824 | if (attr && DW_STRING (attr)) |
| 2825 | fieldname = DW_STRING (attr); |
| 2826 | else |
| 2827 | return; |
| 2828 | |
| 2829 | /* Get the mangled name. */ |
| 2830 | physname = dwarf2_linkage_name (die, cu); |
| 2831 | |
| 2832 | /* Look up member function name in fieldlist. */ |
| 2833 | for (i = 0; i < fip->nfnfields; i++) |
| 2834 | { |
| 2835 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
| 2836 | break; |
| 2837 | } |
| 2838 | |
| 2839 | /* Create new list element if necessary. */ |
| 2840 | if (i < fip->nfnfields) |
| 2841 | flp = &fip->fnfieldlists[i]; |
| 2842 | else |
| 2843 | { |
| 2844 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) |
| 2845 | { |
| 2846 | fip->fnfieldlists = (struct fnfieldlist *) |
| 2847 | xrealloc (fip->fnfieldlists, |
| 2848 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) |
| 2849 | * sizeof (struct fnfieldlist)); |
| 2850 | if (fip->nfnfields == 0) |
| 2851 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
| 2852 | } |
| 2853 | flp = &fip->fnfieldlists[fip->nfnfields]; |
| 2854 | flp->name = fieldname; |
| 2855 | flp->length = 0; |
| 2856 | flp->head = NULL; |
| 2857 | fip->nfnfields++; |
| 2858 | } |
| 2859 | |
| 2860 | /* Create a new member function field and chain it to the field list |
| 2861 | entry. */ |
| 2862 | new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); |
| 2863 | make_cleanup (xfree, new_fnfield); |
| 2864 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
| 2865 | new_fnfield->next = flp->head; |
| 2866 | flp->head = new_fnfield; |
| 2867 | flp->length++; |
| 2868 | |
| 2869 | /* Fill in the member function field info. */ |
| 2870 | fnp = &new_fnfield->fnfield; |
| 2871 | fnp->physname = obsavestring (physname, strlen (physname), |
| 2872 | &objfile->objfile_obstack); |
| 2873 | fnp->type = alloc_type (objfile); |
| 2874 | if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC) |
| 2875 | { |
| 2876 | int nparams = TYPE_NFIELDS (die->type); |
| 2877 | |
| 2878 | /* TYPE is the domain of this method, and DIE->TYPE is the type |
| 2879 | of the method itself (TYPE_CODE_METHOD). */ |
| 2880 | smash_to_method_type (fnp->type, type, |
| 2881 | TYPE_TARGET_TYPE (die->type), |
| 2882 | TYPE_FIELDS (die->type), |
| 2883 | TYPE_NFIELDS (die->type), |
| 2884 | TYPE_VARARGS (die->type)); |
| 2885 | |
| 2886 | /* Handle static member functions. |
| 2887 | Dwarf2 has no clean way to discern C++ static and non-static |
| 2888 | member functions. G++ helps GDB by marking the first |
| 2889 | parameter for non-static member functions (which is the |
| 2890 | this pointer) as artificial. We obtain this information |
| 2891 | from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ |
| 2892 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0) |
| 2893 | fnp->voffset = VOFFSET_STATIC; |
| 2894 | } |
| 2895 | else |
| 2896 | complaint (&symfile_complaints, "member function type missing for '%s'", |
| 2897 | physname); |
| 2898 | |
| 2899 | /* Get fcontext from DW_AT_containing_type if present. */ |
| 2900 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
| 2901 | fnp->fcontext = die_containing_type (die, cu); |
| 2902 | |
| 2903 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const |
| 2904 | and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ |
| 2905 | |
| 2906 | /* Get accessibility. */ |
| 2907 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
| 2908 | if (attr) |
| 2909 | { |
| 2910 | switch (DW_UNSND (attr)) |
| 2911 | { |
| 2912 | case DW_ACCESS_private: |
| 2913 | fnp->is_private = 1; |
| 2914 | break; |
| 2915 | case DW_ACCESS_protected: |
| 2916 | fnp->is_protected = 1; |
| 2917 | break; |
| 2918 | } |
| 2919 | } |
| 2920 | |
| 2921 | /* Check for artificial methods. */ |
| 2922 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
| 2923 | if (attr && DW_UNSND (attr) != 0) |
| 2924 | fnp->is_artificial = 1; |
| 2925 | |
| 2926 | /* Get index in virtual function table if it is a virtual member function. */ |
| 2927 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
| 2928 | if (attr) |
| 2929 | { |
| 2930 | /* Support the .debug_loc offsets */ |
| 2931 | if (attr_form_is_block (attr)) |
| 2932 | { |
| 2933 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; |
| 2934 | } |
| 2935 | else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8) |
| 2936 | { |
| 2937 | dwarf2_complex_location_expr_complaint (); |
| 2938 | } |
| 2939 | else |
| 2940 | { |
| 2941 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
| 2942 | fieldname); |
| 2943 | } |
| 2944 | } |
| 2945 | } |
| 2946 | |
| 2947 | /* Create the vector of member function fields, and attach it to the type. */ |
| 2948 | |
| 2949 | static void |
| 2950 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
| 2951 | struct dwarf2_cu *cu) |
| 2952 | { |
| 2953 | struct fnfieldlist *flp; |
| 2954 | int total_length = 0; |
| 2955 | int i; |
| 2956 | |
| 2957 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 2958 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) |
| 2959 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); |
| 2960 | |
| 2961 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) |
| 2962 | { |
| 2963 | struct nextfnfield *nfp = flp->head; |
| 2964 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
| 2965 | int k; |
| 2966 | |
| 2967 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; |
| 2968 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; |
| 2969 | fn_flp->fn_fields = (struct fn_field *) |
| 2970 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); |
| 2971 | for (k = flp->length; (k--, nfp); nfp = nfp->next) |
| 2972 | fn_flp->fn_fields[k] = nfp->fnfield; |
| 2973 | |
| 2974 | total_length += flp->length; |
| 2975 | } |
| 2976 | |
| 2977 | TYPE_NFN_FIELDS (type) = fip->nfnfields; |
| 2978 | TYPE_NFN_FIELDS_TOTAL (type) = total_length; |
| 2979 | } |
| 2980 | |
| 2981 | /* Called when we find the DIE that starts a structure or union scope |
| 2982 | (definition) to process all dies that define the members of the |
| 2983 | structure or union. |
| 2984 | |
| 2985 | NOTE: we need to call struct_type regardless of whether or not the |
| 2986 | DIE has an at_name attribute, since it might be an anonymous |
| 2987 | structure or union. This gets the type entered into our set of |
| 2988 | user defined types. |
| 2989 | |
| 2990 | However, if the structure is incomplete (an opaque struct/union) |
| 2991 | then suppress creating a symbol table entry for it since gdb only |
| 2992 | wants to find the one with the complete definition. Note that if |
| 2993 | it is complete, we just call new_symbol, which does it's own |
| 2994 | checking about whether the struct/union is anonymous or not (and |
| 2995 | suppresses creating a symbol table entry itself). */ |
| 2996 | |
| 2997 | static void |
| 2998 | read_structure_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 2999 | { |
| 3000 | struct objfile *objfile = cu->objfile; |
| 3001 | struct type *type; |
| 3002 | struct attribute *attr; |
| 3003 | const char *name = NULL; |
| 3004 | const char *previous_prefix = processing_current_prefix; |
| 3005 | struct cleanup *back_to = NULL; |
| 3006 | /* This says whether or not we want to try to update the structure's |
| 3007 | name to include enclosing namespace/class information, if |
| 3008 | any. */ |
| 3009 | int need_to_update_name = 0; |
| 3010 | |
| 3011 | type = alloc_type (objfile); |
| 3012 | |
| 3013 | INIT_CPLUS_SPECIFIC (type); |
| 3014 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 3015 | if (attr && DW_STRING (attr)) |
| 3016 | { |
| 3017 | name = DW_STRING (attr); |
| 3018 | |
| 3019 | if (cu->language == language_cplus) |
| 3020 | { |
| 3021 | struct die_info *spec_die = die_specification (die, cu); |
| 3022 | |
| 3023 | if (spec_die != NULL) |
| 3024 | { |
| 3025 | char *specification_prefix = determine_prefix (spec_die, cu); |
| 3026 | processing_current_prefix = specification_prefix; |
| 3027 | back_to = make_cleanup (xfree, specification_prefix); |
| 3028 | } |
| 3029 | } |
| 3030 | |
| 3031 | if (processing_has_namespace_info) |
| 3032 | { |
| 3033 | /* FIXME: carlton/2003-11-10: This variable exists only for |
| 3034 | const-correctness reasons. When I tried to change |
| 3035 | TYPE_TAG_NAME to be a const char *, I ran into a cascade |
| 3036 | of changes which would have forced decode_line_1 to take |
| 3037 | a const char **. */ |
| 3038 | char *new_prefix = obconcat (&objfile->objfile_obstack, |
| 3039 | processing_current_prefix, |
| 3040 | processing_current_prefix[0] == '\0' |
| 3041 | ? "" : "::", |
| 3042 | name); |
| 3043 | TYPE_TAG_NAME (type) = new_prefix; |
| 3044 | processing_current_prefix = new_prefix; |
| 3045 | } |
| 3046 | else |
| 3047 | { |
| 3048 | TYPE_TAG_NAME (type) = obsavestring (name, strlen (name), |
| 3049 | &objfile->objfile_obstack); |
| 3050 | need_to_update_name = (cu->language == language_cplus); |
| 3051 | } |
| 3052 | } |
| 3053 | |
| 3054 | if (die->tag == DW_TAG_structure_type) |
| 3055 | { |
| 3056 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
| 3057 | } |
| 3058 | else if (die->tag == DW_TAG_union_type) |
| 3059 | { |
| 3060 | TYPE_CODE (type) = TYPE_CODE_UNION; |
| 3061 | } |
| 3062 | else |
| 3063 | { |
| 3064 | /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT |
| 3065 | in gdbtypes.h. */ |
| 3066 | TYPE_CODE (type) = TYPE_CODE_CLASS; |
| 3067 | } |
| 3068 | |
| 3069 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 3070 | if (attr) |
| 3071 | { |
| 3072 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 3073 | } |
| 3074 | else |
| 3075 | { |
| 3076 | TYPE_LENGTH (type) = 0; |
| 3077 | } |
| 3078 | |
| 3079 | /* We need to add the type field to the die immediately so we don't |
| 3080 | infinitely recurse when dealing with pointers to the structure |
| 3081 | type within the structure itself. */ |
| 3082 | die->type = type; |
| 3083 | |
| 3084 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
| 3085 | { |
| 3086 | struct field_info fi; |
| 3087 | struct die_info *child_die; |
| 3088 | struct cleanup *back_to = make_cleanup (null_cleanup, NULL); |
| 3089 | |
| 3090 | memset (&fi, 0, sizeof (struct field_info)); |
| 3091 | |
| 3092 | child_die = die->child; |
| 3093 | |
| 3094 | while (child_die && child_die->tag) |
| 3095 | { |
| 3096 | if (child_die->tag == DW_TAG_member |
| 3097 | || child_die->tag == DW_TAG_variable) |
| 3098 | { |
| 3099 | /* NOTE: carlton/2002-11-05: A C++ static data member |
| 3100 | should be a DW_TAG_member that is a declaration, but |
| 3101 | all versions of G++ as of this writing (so through at |
| 3102 | least 3.2.1) incorrectly generate DW_TAG_variable |
| 3103 | tags for them instead. */ |
| 3104 | dwarf2_add_field (&fi, child_die, cu); |
| 3105 | } |
| 3106 | else if (child_die->tag == DW_TAG_subprogram) |
| 3107 | { |
| 3108 | /* C++ member function. */ |
| 3109 | process_die (child_die, cu); |
| 3110 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
| 3111 | if (need_to_update_name) |
| 3112 | { |
| 3113 | /* The demangled names of member functions contain |
| 3114 | information about enclosing namespaces/classes, |
| 3115 | if any. */ |
| 3116 | |
| 3117 | /* FIXME: carlton/2003-11-10: The excessive |
| 3118 | demangling here is a bit wasteful, as is the |
| 3119 | memory usage for names. */ |
| 3120 | |
| 3121 | /* NOTE: carlton/2003-11-10: As commented in |
| 3122 | add_partial_structure, the demangler sometimes |
| 3123 | prints the type info in a different form from the |
| 3124 | debug info. We could solve this by using the |
| 3125 | demangled name to get the prefix; if doing so, |
| 3126 | however, we'd need to be careful when reading a |
| 3127 | class that's nested inside a template class. |
| 3128 | That would also cause problems when trying to |
| 3129 | determine RTTI information, since we use the |
| 3130 | demangler to determine the appropriate class |
| 3131 | name. */ |
| 3132 | char *actual_class_name |
| 3133 | = class_name_from_physname (dwarf2_linkage_name |
| 3134 | (child_die, cu)); |
| 3135 | if (actual_class_name != NULL |
| 3136 | && strcmp (actual_class_name, name) != 0) |
| 3137 | { |
| 3138 | TYPE_TAG_NAME (type) |
| 3139 | = obsavestring (actual_class_name, |
| 3140 | strlen (actual_class_name), |
| 3141 | &objfile->objfile_obstack); |
| 3142 | } |
| 3143 | xfree (actual_class_name); |
| 3144 | need_to_update_name = 0; |
| 3145 | } |
| 3146 | } |
| 3147 | else if (child_die->tag == DW_TAG_inheritance) |
| 3148 | { |
| 3149 | /* C++ base class field. */ |
| 3150 | dwarf2_add_field (&fi, child_die, cu); |
| 3151 | } |
| 3152 | else |
| 3153 | { |
| 3154 | process_die (child_die, cu); |
| 3155 | } |
| 3156 | child_die = sibling_die (child_die); |
| 3157 | } |
| 3158 | |
| 3159 | /* Attach fields and member functions to the type. */ |
| 3160 | if (fi.nfields) |
| 3161 | dwarf2_attach_fields_to_type (&fi, type, cu); |
| 3162 | if (fi.nfnfields) |
| 3163 | { |
| 3164 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
| 3165 | |
| 3166 | /* Get the type which refers to the base class (possibly this |
| 3167 | class itself) which contains the vtable pointer for the current |
| 3168 | class from the DW_AT_containing_type attribute. */ |
| 3169 | |
| 3170 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
| 3171 | { |
| 3172 | struct type *t = die_containing_type (die, cu); |
| 3173 | |
| 3174 | TYPE_VPTR_BASETYPE (type) = t; |
| 3175 | if (type == t) |
| 3176 | { |
| 3177 | static const char vptr_name[] = |
| 3178 | {'_', 'v', 'p', 't', 'r', '\0'}; |
| 3179 | int i; |
| 3180 | |
| 3181 | /* Our own class provides vtbl ptr. */ |
| 3182 | for (i = TYPE_NFIELDS (t) - 1; |
| 3183 | i >= TYPE_N_BASECLASSES (t); |
| 3184 | --i) |
| 3185 | { |
| 3186 | char *fieldname = TYPE_FIELD_NAME (t, i); |
| 3187 | |
| 3188 | if ((strncmp (fieldname, vptr_name, |
| 3189 | strlen (vptr_name) - 1) |
| 3190 | == 0) |
| 3191 | && is_cplus_marker (fieldname[strlen (vptr_name)])) |
| 3192 | { |
| 3193 | TYPE_VPTR_FIELDNO (type) = i; |
| 3194 | break; |
| 3195 | } |
| 3196 | } |
| 3197 | |
| 3198 | /* Complain if virtual function table field not found. */ |
| 3199 | if (i < TYPE_N_BASECLASSES (t)) |
| 3200 | complaint (&symfile_complaints, |
| 3201 | "virtual function table pointer not found when defining class '%s'", |
| 3202 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
| 3203 | ""); |
| 3204 | } |
| 3205 | else |
| 3206 | { |
| 3207 | TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); |
| 3208 | } |
| 3209 | } |
| 3210 | } |
| 3211 | |
| 3212 | new_symbol (die, type, cu); |
| 3213 | |
| 3214 | do_cleanups (back_to); |
| 3215 | } |
| 3216 | else |
| 3217 | { |
| 3218 | /* No children, must be stub. */ |
| 3219 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; |
| 3220 | } |
| 3221 | |
| 3222 | processing_current_prefix = previous_prefix; |
| 3223 | if (back_to != NULL) |
| 3224 | do_cleanups (back_to); |
| 3225 | } |
| 3226 | |
| 3227 | /* Given a pointer to a die which begins an enumeration, process all |
| 3228 | the dies that define the members of the enumeration. |
| 3229 | |
| 3230 | This will be much nicer in draft 6 of the DWARF spec when our |
| 3231 | members will be dies instead squished into the DW_AT_element_list |
| 3232 | attribute. |
| 3233 | |
| 3234 | NOTE: We reverse the order of the element list. */ |
| 3235 | |
| 3236 | static void |
| 3237 | read_enumeration (struct die_info *die, struct dwarf2_cu *cu) |
| 3238 | { |
| 3239 | struct objfile *objfile = cu->objfile; |
| 3240 | struct die_info *child_die; |
| 3241 | struct type *type; |
| 3242 | struct field *fields; |
| 3243 | struct attribute *attr; |
| 3244 | struct symbol *sym; |
| 3245 | int num_fields; |
| 3246 | int unsigned_enum = 1; |
| 3247 | |
| 3248 | type = alloc_type (objfile); |
| 3249 | |
| 3250 | TYPE_CODE (type) = TYPE_CODE_ENUM; |
| 3251 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 3252 | if (attr && DW_STRING (attr)) |
| 3253 | { |
| 3254 | const char *name = DW_STRING (attr); |
| 3255 | |
| 3256 | if (processing_has_namespace_info) |
| 3257 | { |
| 3258 | TYPE_TAG_NAME (type) = obconcat (&objfile->objfile_obstack, |
| 3259 | processing_current_prefix, |
| 3260 | processing_current_prefix[0] == '\0' |
| 3261 | ? "" : "::", |
| 3262 | name); |
| 3263 | } |
| 3264 | else |
| 3265 | { |
| 3266 | TYPE_TAG_NAME (type) = obsavestring (name, strlen (name), |
| 3267 | &objfile->objfile_obstack); |
| 3268 | } |
| 3269 | } |
| 3270 | |
| 3271 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 3272 | if (attr) |
| 3273 | { |
| 3274 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 3275 | } |
| 3276 | else |
| 3277 | { |
| 3278 | TYPE_LENGTH (type) = 0; |
| 3279 | } |
| 3280 | |
| 3281 | num_fields = 0; |
| 3282 | fields = NULL; |
| 3283 | if (die->child != NULL) |
| 3284 | { |
| 3285 | child_die = die->child; |
| 3286 | while (child_die && child_die->tag) |
| 3287 | { |
| 3288 | if (child_die->tag != DW_TAG_enumerator) |
| 3289 | { |
| 3290 | process_die (child_die, cu); |
| 3291 | } |
| 3292 | else |
| 3293 | { |
| 3294 | attr = dwarf2_attr (child_die, DW_AT_name, cu); |
| 3295 | if (attr) |
| 3296 | { |
| 3297 | sym = new_symbol (child_die, type, cu); |
| 3298 | if (SYMBOL_VALUE (sym) < 0) |
| 3299 | unsigned_enum = 0; |
| 3300 | |
| 3301 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) |
| 3302 | { |
| 3303 | fields = (struct field *) |
| 3304 | xrealloc (fields, |
| 3305 | (num_fields + DW_FIELD_ALLOC_CHUNK) |
| 3306 | * sizeof (struct field)); |
| 3307 | } |
| 3308 | |
| 3309 | FIELD_NAME (fields[num_fields]) = DEPRECATED_SYMBOL_NAME (sym); |
| 3310 | FIELD_TYPE (fields[num_fields]) = NULL; |
| 3311 | FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym); |
| 3312 | FIELD_BITSIZE (fields[num_fields]) = 0; |
| 3313 | FIELD_STATIC_KIND (fields[num_fields]) = 0; |
| 3314 | |
| 3315 | num_fields++; |
| 3316 | } |
| 3317 | } |
| 3318 | |
| 3319 | child_die = sibling_die (child_die); |
| 3320 | } |
| 3321 | |
| 3322 | if (num_fields) |
| 3323 | { |
| 3324 | TYPE_NFIELDS (type) = num_fields; |
| 3325 | TYPE_FIELDS (type) = (struct field *) |
| 3326 | TYPE_ALLOC (type, sizeof (struct field) * num_fields); |
| 3327 | memcpy (TYPE_FIELDS (type), fields, |
| 3328 | sizeof (struct field) * num_fields); |
| 3329 | xfree (fields); |
| 3330 | } |
| 3331 | if (unsigned_enum) |
| 3332 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; |
| 3333 | } |
| 3334 | die->type = type; |
| 3335 | new_symbol (die, type, cu); |
| 3336 | } |
| 3337 | |
| 3338 | /* Extract all information from a DW_TAG_array_type DIE and put it in |
| 3339 | the DIE's type field. For now, this only handles one dimensional |
| 3340 | arrays. */ |
| 3341 | |
| 3342 | static void |
| 3343 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
| 3344 | { |
| 3345 | struct objfile *objfile = cu->objfile; |
| 3346 | struct die_info *child_die; |
| 3347 | struct type *type = NULL; |
| 3348 | struct type *element_type, *range_type, *index_type; |
| 3349 | struct type **range_types = NULL; |
| 3350 | struct attribute *attr; |
| 3351 | int ndim = 0; |
| 3352 | struct cleanup *back_to; |
| 3353 | |
| 3354 | /* Return if we've already decoded this type. */ |
| 3355 | if (die->type) |
| 3356 | { |
| 3357 | return; |
| 3358 | } |
| 3359 | |
| 3360 | element_type = die_type (die, cu); |
| 3361 | |
| 3362 | /* Irix 6.2 native cc creates array types without children for |
| 3363 | arrays with unspecified length. */ |
| 3364 | if (die->child == NULL) |
| 3365 | { |
| 3366 | index_type = dwarf2_fundamental_type (objfile, FT_INTEGER, cu); |
| 3367 | range_type = create_range_type (NULL, index_type, 0, -1); |
| 3368 | die->type = create_array_type (NULL, element_type, range_type); |
| 3369 | return; |
| 3370 | } |
| 3371 | |
| 3372 | back_to = make_cleanup (null_cleanup, NULL); |
| 3373 | child_die = die->child; |
| 3374 | while (child_die && child_die->tag) |
| 3375 | { |
| 3376 | if (child_die->tag == DW_TAG_subrange_type) |
| 3377 | { |
| 3378 | read_subrange_type (child_die, cu); |
| 3379 | |
| 3380 | if (child_die->type != NULL) |
| 3381 | { |
| 3382 | /* The range type was succesfully read. Save it for |
| 3383 | the array type creation. */ |
| 3384 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
| 3385 | { |
| 3386 | range_types = (struct type **) |
| 3387 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) |
| 3388 | * sizeof (struct type *)); |
| 3389 | if (ndim == 0) |
| 3390 | make_cleanup (free_current_contents, &range_types); |
| 3391 | } |
| 3392 | range_types[ndim++] = child_die->type; |
| 3393 | } |
| 3394 | } |
| 3395 | child_die = sibling_die (child_die); |
| 3396 | } |
| 3397 | |
| 3398 | /* Dwarf2 dimensions are output from left to right, create the |
| 3399 | necessary array types in backwards order. */ |
| 3400 | type = element_type; |
| 3401 | while (ndim-- > 0) |
| 3402 | type = create_array_type (NULL, type, range_types[ndim]); |
| 3403 | |
| 3404 | /* Understand Dwarf2 support for vector types (like they occur on |
| 3405 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the |
| 3406 | array type. This is not part of the Dwarf2/3 standard yet, but a |
| 3407 | custom vendor extension. The main difference between a regular |
| 3408 | array and the vector variant is that vectors are passed by value |
| 3409 | to functions. */ |
| 3410 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
| 3411 | if (attr) |
| 3412 | TYPE_FLAGS (type) |= TYPE_FLAG_VECTOR; |
| 3413 | |
| 3414 | do_cleanups (back_to); |
| 3415 | |
| 3416 | /* Install the type in the die. */ |
| 3417 | die->type = type; |
| 3418 | } |
| 3419 | |
| 3420 | /* First cut: install each common block member as a global variable. */ |
| 3421 | |
| 3422 | static void |
| 3423 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
| 3424 | { |
| 3425 | struct die_info *child_die; |
| 3426 | struct attribute *attr; |
| 3427 | struct symbol *sym; |
| 3428 | CORE_ADDR base = (CORE_ADDR) 0; |
| 3429 | |
| 3430 | attr = dwarf2_attr (die, DW_AT_location, cu); |
| 3431 | if (attr) |
| 3432 | { |
| 3433 | /* Support the .debug_loc offsets */ |
| 3434 | if (attr_form_is_block (attr)) |
| 3435 | { |
| 3436 | base = decode_locdesc (DW_BLOCK (attr), cu); |
| 3437 | } |
| 3438 | else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8) |
| 3439 | { |
| 3440 | dwarf2_complex_location_expr_complaint (); |
| 3441 | } |
| 3442 | else |
| 3443 | { |
| 3444 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
| 3445 | "common block member"); |
| 3446 | } |
| 3447 | } |
| 3448 | if (die->child != NULL) |
| 3449 | { |
| 3450 | child_die = die->child; |
| 3451 | while (child_die && child_die->tag) |
| 3452 | { |
| 3453 | sym = new_symbol (child_die, NULL, cu); |
| 3454 | attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu); |
| 3455 | if (attr) |
| 3456 | { |
| 3457 | SYMBOL_VALUE_ADDRESS (sym) = |
| 3458 | base + decode_locdesc (DW_BLOCK (attr), cu); |
| 3459 | add_symbol_to_list (sym, &global_symbols); |
| 3460 | } |
| 3461 | child_die = sibling_die (child_die); |
| 3462 | } |
| 3463 | } |
| 3464 | } |
| 3465 | |
| 3466 | /* Read a C++ namespace. */ |
| 3467 | |
| 3468 | static void |
| 3469 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) |
| 3470 | { |
| 3471 | struct objfile *objfile = cu->objfile; |
| 3472 | const char *previous_prefix = processing_current_prefix; |
| 3473 | const char *name; |
| 3474 | int is_anonymous; |
| 3475 | struct die_info *current_die; |
| 3476 | |
| 3477 | name = namespace_name (die, &is_anonymous, cu); |
| 3478 | |
| 3479 | /* Now build the name of the current namespace. */ |
| 3480 | |
| 3481 | if (previous_prefix[0] == '\0') |
| 3482 | { |
| 3483 | processing_current_prefix = name; |
| 3484 | } |
| 3485 | else |
| 3486 | { |
| 3487 | /* We need temp_name around because processing_current_prefix |
| 3488 | is a const char *. */ |
| 3489 | char *temp_name = alloca (strlen (previous_prefix) |
| 3490 | + 2 + strlen(name) + 1); |
| 3491 | strcpy (temp_name, previous_prefix); |
| 3492 | strcat (temp_name, "::"); |
| 3493 | strcat (temp_name, name); |
| 3494 | |
| 3495 | processing_current_prefix = temp_name; |
| 3496 | } |
| 3497 | |
| 3498 | /* Add a symbol associated to this if we haven't seen the namespace |
| 3499 | before. Also, add a using directive if it's an anonymous |
| 3500 | namespace. */ |
| 3501 | |
| 3502 | if (dwarf2_extension (die, cu) == NULL) |
| 3503 | { |
| 3504 | struct type *type; |
| 3505 | |
| 3506 | /* FIXME: carlton/2003-06-27: Once GDB is more const-correct, |
| 3507 | this cast will hopefully become unnecessary. */ |
| 3508 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, |
| 3509 | (char *) processing_current_prefix, |
| 3510 | objfile); |
| 3511 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
| 3512 | |
| 3513 | new_symbol (die, type, cu); |
| 3514 | |
| 3515 | if (is_anonymous) |
| 3516 | cp_add_using_directive (processing_current_prefix, |
| 3517 | strlen (previous_prefix), |
| 3518 | strlen (processing_current_prefix)); |
| 3519 | } |
| 3520 | |
| 3521 | if (die->child != NULL) |
| 3522 | { |
| 3523 | struct die_info *child_die = die->child; |
| 3524 | |
| 3525 | while (child_die && child_die->tag) |
| 3526 | { |
| 3527 | process_die (child_die, cu); |
| 3528 | child_die = sibling_die (child_die); |
| 3529 | } |
| 3530 | } |
| 3531 | |
| 3532 | processing_current_prefix = previous_prefix; |
| 3533 | } |
| 3534 | |
| 3535 | /* Return the name of the namespace represented by DIE. Set |
| 3536 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous |
| 3537 | namespace. */ |
| 3538 | |
| 3539 | static const char * |
| 3540 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
| 3541 | { |
| 3542 | struct die_info *current_die; |
| 3543 | const char *name = NULL; |
| 3544 | |
| 3545 | /* Loop through the extensions until we find a name. */ |
| 3546 | |
| 3547 | for (current_die = die; |
| 3548 | current_die != NULL; |
| 3549 | current_die = dwarf2_extension (die, cu)) |
| 3550 | { |
| 3551 | name = dwarf2_name (current_die, cu); |
| 3552 | if (name != NULL) |
| 3553 | break; |
| 3554 | } |
| 3555 | |
| 3556 | /* Is it an anonymous namespace? */ |
| 3557 | |
| 3558 | *is_anonymous = (name == NULL); |
| 3559 | if (*is_anonymous) |
| 3560 | name = "(anonymous namespace)"; |
| 3561 | |
| 3562 | return name; |
| 3563 | } |
| 3564 | |
| 3565 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
| 3566 | the user defined type vector. */ |
| 3567 | |
| 3568 | static void |
| 3569 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
| 3570 | { |
| 3571 | struct comp_unit_head *cu_header = &cu->header; |
| 3572 | struct type *type; |
| 3573 | struct attribute *attr_byte_size; |
| 3574 | struct attribute *attr_address_class; |
| 3575 | int byte_size, addr_class; |
| 3576 | |
| 3577 | if (die->type) |
| 3578 | { |
| 3579 | return; |
| 3580 | } |
| 3581 | |
| 3582 | type = lookup_pointer_type (die_type (die, cu)); |
| 3583 | |
| 3584 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 3585 | if (attr_byte_size) |
| 3586 | byte_size = DW_UNSND (attr_byte_size); |
| 3587 | else |
| 3588 | byte_size = cu_header->addr_size; |
| 3589 | |
| 3590 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
| 3591 | if (attr_address_class) |
| 3592 | addr_class = DW_UNSND (attr_address_class); |
| 3593 | else |
| 3594 | addr_class = DW_ADDR_none; |
| 3595 | |
| 3596 | /* If the pointer size or address class is different than the |
| 3597 | default, create a type variant marked as such and set the |
| 3598 | length accordingly. */ |
| 3599 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) |
| 3600 | { |
| 3601 | if (ADDRESS_CLASS_TYPE_FLAGS_P ()) |
| 3602 | { |
| 3603 | int type_flags; |
| 3604 | |
| 3605 | type_flags = ADDRESS_CLASS_TYPE_FLAGS (byte_size, addr_class); |
| 3606 | gdb_assert ((type_flags & ~TYPE_FLAG_ADDRESS_CLASS_ALL) == 0); |
| 3607 | type = make_type_with_address_space (type, type_flags); |
| 3608 | } |
| 3609 | else if (TYPE_LENGTH (type) != byte_size) |
| 3610 | { |
| 3611 | complaint (&symfile_complaints, "invalid pointer size %d", byte_size); |
| 3612 | } |
| 3613 | else { |
| 3614 | /* Should we also complain about unhandled address classes? */ |
| 3615 | } |
| 3616 | } |
| 3617 | |
| 3618 | TYPE_LENGTH (type) = byte_size; |
| 3619 | die->type = type; |
| 3620 | } |
| 3621 | |
| 3622 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to |
| 3623 | the user defined type vector. */ |
| 3624 | |
| 3625 | static void |
| 3626 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
| 3627 | { |
| 3628 | struct objfile *objfile = cu->objfile; |
| 3629 | struct type *type; |
| 3630 | struct type *to_type; |
| 3631 | struct type *domain; |
| 3632 | |
| 3633 | if (die->type) |
| 3634 | { |
| 3635 | return; |
| 3636 | } |
| 3637 | |
| 3638 | type = alloc_type (objfile); |
| 3639 | to_type = die_type (die, cu); |
| 3640 | domain = die_containing_type (die, cu); |
| 3641 | smash_to_member_type (type, domain, to_type); |
| 3642 | |
| 3643 | die->type = type; |
| 3644 | } |
| 3645 | |
| 3646 | /* Extract all information from a DW_TAG_reference_type DIE and add to |
| 3647 | the user defined type vector. */ |
| 3648 | |
| 3649 | static void |
| 3650 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
| 3651 | { |
| 3652 | struct comp_unit_head *cu_header = &cu->header; |
| 3653 | struct type *type; |
| 3654 | struct attribute *attr; |
| 3655 | |
| 3656 | if (die->type) |
| 3657 | { |
| 3658 | return; |
| 3659 | } |
| 3660 | |
| 3661 | type = lookup_reference_type (die_type (die, cu)); |
| 3662 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 3663 | if (attr) |
| 3664 | { |
| 3665 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 3666 | } |
| 3667 | else |
| 3668 | { |
| 3669 | TYPE_LENGTH (type) = cu_header->addr_size; |
| 3670 | } |
| 3671 | die->type = type; |
| 3672 | } |
| 3673 | |
| 3674 | static void |
| 3675 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
| 3676 | { |
| 3677 | struct type *base_type; |
| 3678 | |
| 3679 | if (die->type) |
| 3680 | { |
| 3681 | return; |
| 3682 | } |
| 3683 | |
| 3684 | base_type = die_type (die, cu); |
| 3685 | die->type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
| 3686 | } |
| 3687 | |
| 3688 | static void |
| 3689 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
| 3690 | { |
| 3691 | struct type *base_type; |
| 3692 | |
| 3693 | if (die->type) |
| 3694 | { |
| 3695 | return; |
| 3696 | } |
| 3697 | |
| 3698 | base_type = die_type (die, cu); |
| 3699 | die->type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
| 3700 | } |
| 3701 | |
| 3702 | /* Extract all information from a DW_TAG_string_type DIE and add to |
| 3703 | the user defined type vector. It isn't really a user defined type, |
| 3704 | but it behaves like one, with other DIE's using an AT_user_def_type |
| 3705 | attribute to reference it. */ |
| 3706 | |
| 3707 | static void |
| 3708 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
| 3709 | { |
| 3710 | struct objfile *objfile = cu->objfile; |
| 3711 | struct type *type, *range_type, *index_type, *char_type; |
| 3712 | struct attribute *attr; |
| 3713 | unsigned int length; |
| 3714 | |
| 3715 | if (die->type) |
| 3716 | { |
| 3717 | return; |
| 3718 | } |
| 3719 | |
| 3720 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
| 3721 | if (attr) |
| 3722 | { |
| 3723 | length = DW_UNSND (attr); |
| 3724 | } |
| 3725 | else |
| 3726 | { |
| 3727 | /* check for the DW_AT_byte_size attribute */ |
| 3728 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 3729 | if (attr) |
| 3730 | { |
| 3731 | length = DW_UNSND (attr); |
| 3732 | } |
| 3733 | else |
| 3734 | { |
| 3735 | length = 1; |
| 3736 | } |
| 3737 | } |
| 3738 | index_type = dwarf2_fundamental_type (objfile, FT_INTEGER, cu); |
| 3739 | range_type = create_range_type (NULL, index_type, 1, length); |
| 3740 | if (cu->language == language_fortran) |
| 3741 | { |
| 3742 | /* Need to create a unique string type for bounds |
| 3743 | information */ |
| 3744 | type = create_string_type (0, range_type); |
| 3745 | } |
| 3746 | else |
| 3747 | { |
| 3748 | char_type = dwarf2_fundamental_type (objfile, FT_CHAR, cu); |
| 3749 | type = create_string_type (char_type, range_type); |
| 3750 | } |
| 3751 | die->type = type; |
| 3752 | } |
| 3753 | |
| 3754 | /* Handle DIES due to C code like: |
| 3755 | |
| 3756 | struct foo |
| 3757 | { |
| 3758 | int (*funcp)(int a, long l); |
| 3759 | int b; |
| 3760 | }; |
| 3761 | |
| 3762 | ('funcp' generates a DW_TAG_subroutine_type DIE) |
| 3763 | */ |
| 3764 | |
| 3765 | static void |
| 3766 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
| 3767 | { |
| 3768 | struct type *type; /* Type that this function returns */ |
| 3769 | struct type *ftype; /* Function that returns above type */ |
| 3770 | struct attribute *attr; |
| 3771 | |
| 3772 | /* Decode the type that this subroutine returns */ |
| 3773 | if (die->type) |
| 3774 | { |
| 3775 | return; |
| 3776 | } |
| 3777 | type = die_type (die, cu); |
| 3778 | ftype = lookup_function_type (type); |
| 3779 | |
| 3780 | /* All functions in C++ have prototypes. */ |
| 3781 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); |
| 3782 | if ((attr && (DW_UNSND (attr) != 0)) |
| 3783 | || cu->language == language_cplus) |
| 3784 | TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED; |
| 3785 | |
| 3786 | if (die->child != NULL) |
| 3787 | { |
| 3788 | struct die_info *child_die; |
| 3789 | int nparams = 0; |
| 3790 | int iparams = 0; |
| 3791 | |
| 3792 | /* Count the number of parameters. |
| 3793 | FIXME: GDB currently ignores vararg functions, but knows about |
| 3794 | vararg member functions. */ |
| 3795 | child_die = die->child; |
| 3796 | while (child_die && child_die->tag) |
| 3797 | { |
| 3798 | if (child_die->tag == DW_TAG_formal_parameter) |
| 3799 | nparams++; |
| 3800 | else if (child_die->tag == DW_TAG_unspecified_parameters) |
| 3801 | TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS; |
| 3802 | child_die = sibling_die (child_die); |
| 3803 | } |
| 3804 | |
| 3805 | /* Allocate storage for parameters and fill them in. */ |
| 3806 | TYPE_NFIELDS (ftype) = nparams; |
| 3807 | TYPE_FIELDS (ftype) = (struct field *) |
| 3808 | TYPE_ALLOC (ftype, nparams * sizeof (struct field)); |
| 3809 | |
| 3810 | child_die = die->child; |
| 3811 | while (child_die && child_die->tag) |
| 3812 | { |
| 3813 | if (child_die->tag == DW_TAG_formal_parameter) |
| 3814 | { |
| 3815 | /* Dwarf2 has no clean way to discern C++ static and non-static |
| 3816 | member functions. G++ helps GDB by marking the first |
| 3817 | parameter for non-static member functions (which is the |
| 3818 | this pointer) as artificial. We pass this information |
| 3819 | to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */ |
| 3820 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
| 3821 | if (attr) |
| 3822 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); |
| 3823 | else |
| 3824 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
| 3825 | TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu); |
| 3826 | iparams++; |
| 3827 | } |
| 3828 | child_die = sibling_die (child_die); |
| 3829 | } |
| 3830 | } |
| 3831 | |
| 3832 | die->type = ftype; |
| 3833 | } |
| 3834 | |
| 3835 | static void |
| 3836 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
| 3837 | { |
| 3838 | struct objfile *objfile = cu->objfile; |
| 3839 | struct attribute *attr; |
| 3840 | char *name = NULL; |
| 3841 | |
| 3842 | if (!die->type) |
| 3843 | { |
| 3844 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 3845 | if (attr && DW_STRING (attr)) |
| 3846 | { |
| 3847 | name = DW_STRING (attr); |
| 3848 | } |
| 3849 | die->type = init_type (TYPE_CODE_TYPEDEF, 0, TYPE_FLAG_TARGET_STUB, name, objfile); |
| 3850 | TYPE_TARGET_TYPE (die->type) = die_type (die, cu); |
| 3851 | } |
| 3852 | } |
| 3853 | |
| 3854 | /* Find a representation of a given base type and install |
| 3855 | it in the TYPE field of the die. */ |
| 3856 | |
| 3857 | static void |
| 3858 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
| 3859 | { |
| 3860 | struct objfile *objfile = cu->objfile; |
| 3861 | struct type *type; |
| 3862 | struct attribute *attr; |
| 3863 | int encoding = 0, size = 0; |
| 3864 | |
| 3865 | /* If we've already decoded this die, this is a no-op. */ |
| 3866 | if (die->type) |
| 3867 | { |
| 3868 | return; |
| 3869 | } |
| 3870 | |
| 3871 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
| 3872 | if (attr) |
| 3873 | { |
| 3874 | encoding = DW_UNSND (attr); |
| 3875 | } |
| 3876 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 3877 | if (attr) |
| 3878 | { |
| 3879 | size = DW_UNSND (attr); |
| 3880 | } |
| 3881 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 3882 | if (attr && DW_STRING (attr)) |
| 3883 | { |
| 3884 | enum type_code code = TYPE_CODE_INT; |
| 3885 | int type_flags = 0; |
| 3886 | |
| 3887 | switch (encoding) |
| 3888 | { |
| 3889 | case DW_ATE_address: |
| 3890 | /* Turn DW_ATE_address into a void * pointer. */ |
| 3891 | code = TYPE_CODE_PTR; |
| 3892 | type_flags |= TYPE_FLAG_UNSIGNED; |
| 3893 | break; |
| 3894 | case DW_ATE_boolean: |
| 3895 | code = TYPE_CODE_BOOL; |
| 3896 | type_flags |= TYPE_FLAG_UNSIGNED; |
| 3897 | break; |
| 3898 | case DW_ATE_complex_float: |
| 3899 | code = TYPE_CODE_COMPLEX; |
| 3900 | break; |
| 3901 | case DW_ATE_float: |
| 3902 | code = TYPE_CODE_FLT; |
| 3903 | break; |
| 3904 | case DW_ATE_signed: |
| 3905 | case DW_ATE_signed_char: |
| 3906 | break; |
| 3907 | case DW_ATE_unsigned: |
| 3908 | case DW_ATE_unsigned_char: |
| 3909 | type_flags |= TYPE_FLAG_UNSIGNED; |
| 3910 | break; |
| 3911 | default: |
| 3912 | complaint (&symfile_complaints, "unsupported DW_AT_encoding: '%s'", |
| 3913 | dwarf_type_encoding_name (encoding)); |
| 3914 | break; |
| 3915 | } |
| 3916 | type = init_type (code, size, type_flags, DW_STRING (attr), objfile); |
| 3917 | if (encoding == DW_ATE_address) |
| 3918 | TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID, |
| 3919 | cu); |
| 3920 | else if (encoding == DW_ATE_complex_float) |
| 3921 | { |
| 3922 | if (size == 32) |
| 3923 | TYPE_TARGET_TYPE (type) |
| 3924 | = dwarf2_fundamental_type (objfile, FT_EXT_PREC_FLOAT, cu); |
| 3925 | else if (size == 16) |
| 3926 | TYPE_TARGET_TYPE (type) |
| 3927 | = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT, cu); |
| 3928 | else if (size == 8) |
| 3929 | TYPE_TARGET_TYPE (type) |
| 3930 | = dwarf2_fundamental_type (objfile, FT_FLOAT, cu); |
| 3931 | } |
| 3932 | } |
| 3933 | else |
| 3934 | { |
| 3935 | type = dwarf_base_type (encoding, size, cu); |
| 3936 | } |
| 3937 | die->type = type; |
| 3938 | } |
| 3939 | |
| 3940 | /* Read the given DW_AT_subrange DIE. */ |
| 3941 | |
| 3942 | static void |
| 3943 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
| 3944 | { |
| 3945 | struct type *base_type; |
| 3946 | struct type *range_type; |
| 3947 | struct attribute *attr; |
| 3948 | int low = 0; |
| 3949 | int high = -1; |
| 3950 | |
| 3951 | /* If we have already decoded this die, then nothing more to do. */ |
| 3952 | if (die->type) |
| 3953 | return; |
| 3954 | |
| 3955 | base_type = die_type (die, cu); |
| 3956 | if (base_type == NULL) |
| 3957 | { |
| 3958 | complaint (&symfile_complaints, |
| 3959 | "DW_AT_type missing from DW_TAG_subrange_type"); |
| 3960 | return; |
| 3961 | } |
| 3962 | |
| 3963 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
| 3964 | base_type = alloc_type (NULL); |
| 3965 | |
| 3966 | if (cu->language == language_fortran) |
| 3967 | { |
| 3968 | /* FORTRAN implies a lower bound of 1, if not given. */ |
| 3969 | low = 1; |
| 3970 | } |
| 3971 | |
| 3972 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
| 3973 | if (attr) |
| 3974 | low = dwarf2_get_attr_constant_value (attr, 0); |
| 3975 | |
| 3976 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
| 3977 | if (attr) |
| 3978 | { |
| 3979 | if (attr->form == DW_FORM_block1) |
| 3980 | { |
| 3981 | /* GCC encodes arrays with unspecified or dynamic length |
| 3982 | with a DW_FORM_block1 attribute. |
| 3983 | FIXME: GDB does not yet know how to handle dynamic |
| 3984 | arrays properly, treat them as arrays with unspecified |
| 3985 | length for now. |
| 3986 | |
| 3987 | FIXME: jimb/2003-09-22: GDB does not really know |
| 3988 | how to handle arrays of unspecified length |
| 3989 | either; we just represent them as zero-length |
| 3990 | arrays. Choose an appropriate upper bound given |
| 3991 | the lower bound we've computed above. */ |
| 3992 | high = low - 1; |
| 3993 | } |
| 3994 | else |
| 3995 | high = dwarf2_get_attr_constant_value (attr, 1); |
| 3996 | } |
| 3997 | |
| 3998 | range_type = create_range_type (NULL, base_type, low, high); |
| 3999 | |
| 4000 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 4001 | if (attr && DW_STRING (attr)) |
| 4002 | TYPE_NAME (range_type) = DW_STRING (attr); |
| 4003 | |
| 4004 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 4005 | if (attr) |
| 4006 | TYPE_LENGTH (range_type) = DW_UNSND (attr); |
| 4007 | |
| 4008 | die->type = range_type; |
| 4009 | } |
| 4010 | |
| 4011 | |
| 4012 | /* Read a whole compilation unit into a linked list of dies. */ |
| 4013 | |
| 4014 | static struct die_info * |
| 4015 | read_comp_unit (char *info_ptr, bfd *abfd, struct dwarf2_cu *cu) |
| 4016 | { |
| 4017 | /* Reset die reference table; we are |
| 4018 | building new ones now. */ |
| 4019 | dwarf2_empty_hash_tables (); |
| 4020 | |
| 4021 | return read_die_and_children (info_ptr, abfd, cu, &info_ptr, NULL); |
| 4022 | } |
| 4023 | |
| 4024 | /* Read a single die and all its descendents. Set the die's sibling |
| 4025 | field to NULL; set other fields in the die correctly, and set all |
| 4026 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the |
| 4027 | location of the info_ptr after reading all of those dies. PARENT |
| 4028 | is the parent of the die in question. */ |
| 4029 | |
| 4030 | static struct die_info * |
| 4031 | read_die_and_children (char *info_ptr, bfd *abfd, |
| 4032 | struct dwarf2_cu *cu, |
| 4033 | char **new_info_ptr, |
| 4034 | struct die_info *parent) |
| 4035 | { |
| 4036 | struct die_info *die; |
| 4037 | char *cur_ptr; |
| 4038 | int has_children; |
| 4039 | |
| 4040 | cur_ptr = read_full_die (&die, abfd, info_ptr, cu, &has_children); |
| 4041 | store_in_ref_table (die->offset, die); |
| 4042 | |
| 4043 | if (has_children) |
| 4044 | { |
| 4045 | die->child = read_die_and_siblings (cur_ptr, abfd, cu, |
| 4046 | new_info_ptr, die); |
| 4047 | } |
| 4048 | else |
| 4049 | { |
| 4050 | die->child = NULL; |
| 4051 | *new_info_ptr = cur_ptr; |
| 4052 | } |
| 4053 | |
| 4054 | die->sibling = NULL; |
| 4055 | die->parent = parent; |
| 4056 | return die; |
| 4057 | } |
| 4058 | |
| 4059 | /* Read a die, all of its descendents, and all of its siblings; set |
| 4060 | all of the fields of all of the dies correctly. Arguments are as |
| 4061 | in read_die_and_children. */ |
| 4062 | |
| 4063 | static struct die_info * |
| 4064 | read_die_and_siblings (char *info_ptr, bfd *abfd, |
| 4065 | struct dwarf2_cu *cu, |
| 4066 | char **new_info_ptr, |
| 4067 | struct die_info *parent) |
| 4068 | { |
| 4069 | struct die_info *first_die, *last_sibling; |
| 4070 | char *cur_ptr; |
| 4071 | |
| 4072 | cur_ptr = info_ptr; |
| 4073 | first_die = last_sibling = NULL; |
| 4074 | |
| 4075 | while (1) |
| 4076 | { |
| 4077 | struct die_info *die |
| 4078 | = read_die_and_children (cur_ptr, abfd, cu, &cur_ptr, parent); |
| 4079 | |
| 4080 | if (!first_die) |
| 4081 | { |
| 4082 | first_die = die; |
| 4083 | } |
| 4084 | else |
| 4085 | { |
| 4086 | last_sibling->sibling = die; |
| 4087 | } |
| 4088 | |
| 4089 | if (die->tag == 0) |
| 4090 | { |
| 4091 | *new_info_ptr = cur_ptr; |
| 4092 | return first_die; |
| 4093 | } |
| 4094 | else |
| 4095 | { |
| 4096 | last_sibling = die; |
| 4097 | } |
| 4098 | } |
| 4099 | } |
| 4100 | |
| 4101 | /* Free a linked list of dies. */ |
| 4102 | |
| 4103 | static void |
| 4104 | free_die_list (struct die_info *dies) |
| 4105 | { |
| 4106 | struct die_info *die, *next; |
| 4107 | |
| 4108 | die = dies; |
| 4109 | while (die) |
| 4110 | { |
| 4111 | if (die->child != NULL) |
| 4112 | free_die_list (die->child); |
| 4113 | next = die->sibling; |
| 4114 | xfree (die->attrs); |
| 4115 | xfree (die); |
| 4116 | die = next; |
| 4117 | } |
| 4118 | } |
| 4119 | |
| 4120 | static void |
| 4121 | do_free_die_list_cleanup (void *dies) |
| 4122 | { |
| 4123 | free_die_list (dies); |
| 4124 | } |
| 4125 | |
| 4126 | static struct cleanup * |
| 4127 | make_cleanup_free_die_list (struct die_info *dies) |
| 4128 | { |
| 4129 | return make_cleanup (do_free_die_list_cleanup, dies); |
| 4130 | } |
| 4131 | |
| 4132 | |
| 4133 | /* Read the contents of the section at OFFSET and of size SIZE from the |
| 4134 | object file specified by OBJFILE into the objfile_obstack and return it. */ |
| 4135 | |
| 4136 | char * |
| 4137 | dwarf2_read_section (struct objfile *objfile, asection *sectp) |
| 4138 | { |
| 4139 | bfd *abfd = objfile->obfd; |
| 4140 | char *buf, *retbuf; |
| 4141 | bfd_size_type size = bfd_get_section_size_before_reloc (sectp); |
| 4142 | |
| 4143 | if (size == 0) |
| 4144 | return NULL; |
| 4145 | |
| 4146 | buf = (char *) obstack_alloc (&objfile->objfile_obstack, size); |
| 4147 | retbuf |
| 4148 | = (char *) symfile_relocate_debug_section (abfd, sectp, (bfd_byte *) buf); |
| 4149 | if (retbuf != NULL) |
| 4150 | return retbuf; |
| 4151 | |
| 4152 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
| 4153 | || bfd_bread (buf, size, abfd) != size) |
| 4154 | error ("Dwarf Error: Can't read DWARF data from '%s'", |
| 4155 | bfd_get_filename (abfd)); |
| 4156 | |
| 4157 | return buf; |
| 4158 | } |
| 4159 | |
| 4160 | /* In DWARF version 2, the description of the debugging information is |
| 4161 | stored in a separate .debug_abbrev section. Before we read any |
| 4162 | dies from a section we read in all abbreviations and install them |
| 4163 | in a hash table. */ |
| 4164 | |
| 4165 | static void |
| 4166 | dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu) |
| 4167 | { |
| 4168 | struct comp_unit_head *cu_header = &cu->header; |
| 4169 | char *abbrev_ptr; |
| 4170 | struct abbrev_info *cur_abbrev; |
| 4171 | unsigned int abbrev_number, bytes_read, abbrev_name; |
| 4172 | unsigned int abbrev_form, hash_number; |
| 4173 | |
| 4174 | /* Initialize dwarf2 abbrevs */ |
| 4175 | memset (cu_header->dwarf2_abbrevs, 0, |
| 4176 | ABBREV_HASH_SIZE*sizeof (struct abbrev_info *)); |
| 4177 | |
| 4178 | abbrev_ptr = dwarf_abbrev_buffer + cu_header->abbrev_offset; |
| 4179 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 4180 | abbrev_ptr += bytes_read; |
| 4181 | |
| 4182 | /* loop until we reach an abbrev number of 0 */ |
| 4183 | while (abbrev_number) |
| 4184 | { |
| 4185 | cur_abbrev = dwarf_alloc_abbrev (); |
| 4186 | |
| 4187 | /* read in abbrev header */ |
| 4188 | cur_abbrev->number = abbrev_number; |
| 4189 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 4190 | abbrev_ptr += bytes_read; |
| 4191 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); |
| 4192 | abbrev_ptr += 1; |
| 4193 | |
| 4194 | /* now read in declarations */ |
| 4195 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 4196 | abbrev_ptr += bytes_read; |
| 4197 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 4198 | abbrev_ptr += bytes_read; |
| 4199 | while (abbrev_name) |
| 4200 | { |
| 4201 | if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0) |
| 4202 | { |
| 4203 | cur_abbrev->attrs = (struct attr_abbrev *) |
| 4204 | xrealloc (cur_abbrev->attrs, |
| 4205 | (cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK) |
| 4206 | * sizeof (struct attr_abbrev)); |
| 4207 | } |
| 4208 | cur_abbrev->attrs[cur_abbrev->num_attrs].name = abbrev_name; |
| 4209 | cur_abbrev->attrs[cur_abbrev->num_attrs++].form = abbrev_form; |
| 4210 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 4211 | abbrev_ptr += bytes_read; |
| 4212 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 4213 | abbrev_ptr += bytes_read; |
| 4214 | } |
| 4215 | |
| 4216 | hash_number = abbrev_number % ABBREV_HASH_SIZE; |
| 4217 | cur_abbrev->next = cu_header->dwarf2_abbrevs[hash_number]; |
| 4218 | cu_header->dwarf2_abbrevs[hash_number] = cur_abbrev; |
| 4219 | |
| 4220 | /* Get next abbreviation. |
| 4221 | Under Irix6 the abbreviations for a compilation unit are not |
| 4222 | always properly terminated with an abbrev number of 0. |
| 4223 | Exit loop if we encounter an abbreviation which we have |
| 4224 | already read (which means we are about to read the abbreviations |
| 4225 | for the next compile unit) or if the end of the abbreviation |
| 4226 | table is reached. */ |
| 4227 | if ((unsigned int) (abbrev_ptr - dwarf_abbrev_buffer) |
| 4228 | >= dwarf_abbrev_size) |
| 4229 | break; |
| 4230 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 4231 | abbrev_ptr += bytes_read; |
| 4232 | if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL) |
| 4233 | break; |
| 4234 | } |
| 4235 | } |
| 4236 | |
| 4237 | /* Empty the abbrev table for a new compilation unit. */ |
| 4238 | |
| 4239 | static void |
| 4240 | dwarf2_empty_abbrev_table (void *ptr_to_abbrevs_table) |
| 4241 | { |
| 4242 | int i; |
| 4243 | struct abbrev_info *abbrev, *next; |
| 4244 | struct abbrev_info **abbrevs; |
| 4245 | |
| 4246 | abbrevs = (struct abbrev_info **)ptr_to_abbrevs_table; |
| 4247 | |
| 4248 | for (i = 0; i < ABBREV_HASH_SIZE; ++i) |
| 4249 | { |
| 4250 | next = NULL; |
| 4251 | abbrev = abbrevs[i]; |
| 4252 | while (abbrev) |
| 4253 | { |
| 4254 | next = abbrev->next; |
| 4255 | xfree (abbrev->attrs); |
| 4256 | xfree (abbrev); |
| 4257 | abbrev = next; |
| 4258 | } |
| 4259 | abbrevs[i] = NULL; |
| 4260 | } |
| 4261 | } |
| 4262 | |
| 4263 | /* Lookup an abbrev_info structure in the abbrev hash table. */ |
| 4264 | |
| 4265 | static struct abbrev_info * |
| 4266 | dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu) |
| 4267 | { |
| 4268 | struct comp_unit_head *cu_header = &cu->header; |
| 4269 | unsigned int hash_number; |
| 4270 | struct abbrev_info *abbrev; |
| 4271 | |
| 4272 | hash_number = number % ABBREV_HASH_SIZE; |
| 4273 | abbrev = cu_header->dwarf2_abbrevs[hash_number]; |
| 4274 | |
| 4275 | while (abbrev) |
| 4276 | { |
| 4277 | if (abbrev->number == number) |
| 4278 | return abbrev; |
| 4279 | else |
| 4280 | abbrev = abbrev->next; |
| 4281 | } |
| 4282 | return NULL; |
| 4283 | } |
| 4284 | |
| 4285 | /* Read a minimal amount of information into the minimal die structure. */ |
| 4286 | |
| 4287 | static char * |
| 4288 | read_partial_die (struct partial_die_info *part_die, bfd *abfd, |
| 4289 | char *info_ptr, struct dwarf2_cu *cu) |
| 4290 | { |
| 4291 | unsigned int abbrev_number, bytes_read, i; |
| 4292 | struct abbrev_info *abbrev; |
| 4293 | struct attribute attr; |
| 4294 | struct attribute spec_attr; |
| 4295 | int found_spec_attr = 0; |
| 4296 | int has_low_pc_attr = 0; |
| 4297 | int has_high_pc_attr = 0; |
| 4298 | |
| 4299 | *part_die = zeroed_partial_die; |
| 4300 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 4301 | info_ptr += bytes_read; |
| 4302 | if (!abbrev_number) |
| 4303 | return info_ptr; |
| 4304 | |
| 4305 | abbrev = dwarf2_lookup_abbrev (abbrev_number, cu); |
| 4306 | if (!abbrev) |
| 4307 | { |
| 4308 | error ("Dwarf Error: Could not find abbrev number %d [in module %s]", abbrev_number, |
| 4309 | bfd_get_filename (abfd)); |
| 4310 | } |
| 4311 | part_die->offset = info_ptr - dwarf_info_buffer; |
| 4312 | part_die->tag = abbrev->tag; |
| 4313 | part_die->has_children = abbrev->has_children; |
| 4314 | part_die->abbrev = abbrev_number; |
| 4315 | |
| 4316 | for (i = 0; i < abbrev->num_attrs; ++i) |
| 4317 | { |
| 4318 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu); |
| 4319 | |
| 4320 | /* Store the data if it is of an attribute we want to keep in a |
| 4321 | partial symbol table. */ |
| 4322 | switch (attr.name) |
| 4323 | { |
| 4324 | case DW_AT_name: |
| 4325 | |
| 4326 | /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */ |
| 4327 | if (part_die->name == NULL) |
| 4328 | part_die->name = DW_STRING (&attr); |
| 4329 | break; |
| 4330 | case DW_AT_MIPS_linkage_name: |
| 4331 | part_die->name = DW_STRING (&attr); |
| 4332 | break; |
| 4333 | case DW_AT_low_pc: |
| 4334 | has_low_pc_attr = 1; |
| 4335 | part_die->lowpc = DW_ADDR (&attr); |
| 4336 | break; |
| 4337 | case DW_AT_high_pc: |
| 4338 | has_high_pc_attr = 1; |
| 4339 | part_die->highpc = DW_ADDR (&attr); |
| 4340 | break; |
| 4341 | case DW_AT_location: |
| 4342 | /* Support the .debug_loc offsets */ |
| 4343 | if (attr_form_is_block (&attr)) |
| 4344 | { |
| 4345 | part_die->locdesc = DW_BLOCK (&attr); |
| 4346 | } |
| 4347 | else if (attr.form == DW_FORM_data4 || attr.form == DW_FORM_data8) |
| 4348 | { |
| 4349 | dwarf2_complex_location_expr_complaint (); |
| 4350 | } |
| 4351 | else |
| 4352 | { |
| 4353 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
| 4354 | "partial symbol information"); |
| 4355 | } |
| 4356 | break; |
| 4357 | case DW_AT_language: |
| 4358 | part_die->language = DW_UNSND (&attr); |
| 4359 | break; |
| 4360 | case DW_AT_external: |
| 4361 | part_die->is_external = DW_UNSND (&attr); |
| 4362 | break; |
| 4363 | case DW_AT_declaration: |
| 4364 | part_die->is_declaration = DW_UNSND (&attr); |
| 4365 | break; |
| 4366 | case DW_AT_type: |
| 4367 | part_die->has_type = 1; |
| 4368 | break; |
| 4369 | case DW_AT_abstract_origin: |
| 4370 | case DW_AT_specification: |
| 4371 | found_spec_attr = 1; |
| 4372 | spec_attr = attr; |
| 4373 | break; |
| 4374 | case DW_AT_sibling: |
| 4375 | /* Ignore absolute siblings, they might point outside of |
| 4376 | the current compile unit. */ |
| 4377 | if (attr.form == DW_FORM_ref_addr) |
| 4378 | complaint (&symfile_complaints, "ignoring absolute DW_AT_sibling"); |
| 4379 | else |
| 4380 | part_die->sibling = |
| 4381 | dwarf_info_buffer + dwarf2_get_ref_die_offset (&attr, cu); |
| 4382 | break; |
| 4383 | default: |
| 4384 | break; |
| 4385 | } |
| 4386 | } |
| 4387 | |
| 4388 | /* If we found a reference attribute and the die has no name, try |
| 4389 | to find a name in the referred to die. */ |
| 4390 | |
| 4391 | if (found_spec_attr && part_die->name == NULL) |
| 4392 | { |
| 4393 | struct partial_die_info spec_die; |
| 4394 | char *spec_ptr; |
| 4395 | |
| 4396 | spec_ptr = dwarf_info_buffer |
| 4397 | + dwarf2_get_ref_die_offset (&spec_attr, cu); |
| 4398 | read_partial_die (&spec_die, abfd, spec_ptr, cu); |
| 4399 | if (spec_die.name) |
| 4400 | { |
| 4401 | part_die->name = spec_die.name; |
| 4402 | |
| 4403 | /* Copy DW_AT_external attribute if it is set. */ |
| 4404 | if (spec_die.is_external) |
| 4405 | part_die->is_external = spec_die.is_external; |
| 4406 | } |
| 4407 | } |
| 4408 | |
| 4409 | /* When using the GNU linker, .gnu.linkonce. sections are used to |
| 4410 | eliminate duplicate copies of functions and vtables and such. |
| 4411 | The linker will arbitrarily choose one and discard the others. |
| 4412 | The AT_*_pc values for such functions refer to local labels in |
| 4413 | these sections. If the section from that file was discarded, the |
| 4414 | labels are not in the output, so the relocs get a value of 0. |
| 4415 | If this is a discarded function, mark the pc bounds as invalid, |
| 4416 | so that GDB will ignore it. */ |
| 4417 | if (has_low_pc_attr && has_high_pc_attr |
| 4418 | && part_die->lowpc < part_die->highpc |
| 4419 | && (part_die->lowpc != 0 |
| 4420 | || (bfd_get_file_flags (abfd) & HAS_RELOC))) |
| 4421 | part_die->has_pc_info = 1; |
| 4422 | return info_ptr; |
| 4423 | } |
| 4424 | |
| 4425 | /* Read the die from the .debug_info section buffer. Set DIEP to |
| 4426 | point to a newly allocated die with its information, except for its |
| 4427 | child, sibling, and parent fields. Set HAS_CHILDREN to tell |
| 4428 | whether the die has children or not. */ |
| 4429 | |
| 4430 | static char * |
| 4431 | read_full_die (struct die_info **diep, bfd *abfd, char *info_ptr, |
| 4432 | struct dwarf2_cu *cu, int *has_children) |
| 4433 | { |
| 4434 | unsigned int abbrev_number, bytes_read, i, offset; |
| 4435 | struct abbrev_info *abbrev; |
| 4436 | struct die_info *die; |
| 4437 | |
| 4438 | offset = info_ptr - dwarf_info_buffer; |
| 4439 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 4440 | info_ptr += bytes_read; |
| 4441 | if (!abbrev_number) |
| 4442 | { |
| 4443 | die = dwarf_alloc_die (); |
| 4444 | die->tag = 0; |
| 4445 | die->abbrev = abbrev_number; |
| 4446 | die->type = NULL; |
| 4447 | *diep = die; |
| 4448 | *has_children = 0; |
| 4449 | return info_ptr; |
| 4450 | } |
| 4451 | |
| 4452 | abbrev = dwarf2_lookup_abbrev (abbrev_number, cu); |
| 4453 | if (!abbrev) |
| 4454 | { |
| 4455 | error ("Dwarf Error: could not find abbrev number %d [in module %s]", |
| 4456 | abbrev_number, |
| 4457 | bfd_get_filename (abfd)); |
| 4458 | } |
| 4459 | die = dwarf_alloc_die (); |
| 4460 | die->offset = offset; |
| 4461 | die->tag = abbrev->tag; |
| 4462 | die->abbrev = abbrev_number; |
| 4463 | die->type = NULL; |
| 4464 | |
| 4465 | die->num_attrs = abbrev->num_attrs; |
| 4466 | die->attrs = (struct attribute *) |
| 4467 | xmalloc (die->num_attrs * sizeof (struct attribute)); |
| 4468 | |
| 4469 | for (i = 0; i < abbrev->num_attrs; ++i) |
| 4470 | { |
| 4471 | info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i], |
| 4472 | abfd, info_ptr, cu); |
| 4473 | } |
| 4474 | |
| 4475 | *diep = die; |
| 4476 | *has_children = abbrev->has_children; |
| 4477 | return info_ptr; |
| 4478 | } |
| 4479 | |
| 4480 | /* Read an attribute value described by an attribute form. */ |
| 4481 | |
| 4482 | static char * |
| 4483 | read_attribute_value (struct attribute *attr, unsigned form, |
| 4484 | bfd *abfd, char *info_ptr, |
| 4485 | struct dwarf2_cu *cu) |
| 4486 | { |
| 4487 | struct comp_unit_head *cu_header = &cu->header; |
| 4488 | unsigned int bytes_read; |
| 4489 | struct dwarf_block *blk; |
| 4490 | |
| 4491 | attr->form = form; |
| 4492 | switch (form) |
| 4493 | { |
| 4494 | case DW_FORM_addr: |
| 4495 | case DW_FORM_ref_addr: |
| 4496 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
| 4497 | info_ptr += bytes_read; |
| 4498 | break; |
| 4499 | case DW_FORM_block2: |
| 4500 | blk = dwarf_alloc_block (); |
| 4501 | blk->size = read_2_bytes (abfd, info_ptr); |
| 4502 | info_ptr += 2; |
| 4503 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 4504 | info_ptr += blk->size; |
| 4505 | DW_BLOCK (attr) = blk; |
| 4506 | break; |
| 4507 | case DW_FORM_block4: |
| 4508 | blk = dwarf_alloc_block (); |
| 4509 | blk->size = read_4_bytes (abfd, info_ptr); |
| 4510 | info_ptr += 4; |
| 4511 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 4512 | info_ptr += blk->size; |
| 4513 | DW_BLOCK (attr) = blk; |
| 4514 | break; |
| 4515 | case DW_FORM_data2: |
| 4516 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); |
| 4517 | info_ptr += 2; |
| 4518 | break; |
| 4519 | case DW_FORM_data4: |
| 4520 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); |
| 4521 | info_ptr += 4; |
| 4522 | break; |
| 4523 | case DW_FORM_data8: |
| 4524 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); |
| 4525 | info_ptr += 8; |
| 4526 | break; |
| 4527 | case DW_FORM_string: |
| 4528 | DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read); |
| 4529 | info_ptr += bytes_read; |
| 4530 | break; |
| 4531 | case DW_FORM_strp: |
| 4532 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, |
| 4533 | &bytes_read); |
| 4534 | info_ptr += bytes_read; |
| 4535 | break; |
| 4536 | case DW_FORM_block: |
| 4537 | blk = dwarf_alloc_block (); |
| 4538 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 4539 | info_ptr += bytes_read; |
| 4540 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 4541 | info_ptr += blk->size; |
| 4542 | DW_BLOCK (attr) = blk; |
| 4543 | break; |
| 4544 | case DW_FORM_block1: |
| 4545 | blk = dwarf_alloc_block (); |
| 4546 | blk->size = read_1_byte (abfd, info_ptr); |
| 4547 | info_ptr += 1; |
| 4548 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 4549 | info_ptr += blk->size; |
| 4550 | DW_BLOCK (attr) = blk; |
| 4551 | break; |
| 4552 | case DW_FORM_data1: |
| 4553 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); |
| 4554 | info_ptr += 1; |
| 4555 | break; |
| 4556 | case DW_FORM_flag: |
| 4557 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); |
| 4558 | info_ptr += 1; |
| 4559 | break; |
| 4560 | case DW_FORM_sdata: |
| 4561 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); |
| 4562 | info_ptr += bytes_read; |
| 4563 | break; |
| 4564 | case DW_FORM_udata: |
| 4565 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 4566 | info_ptr += bytes_read; |
| 4567 | break; |
| 4568 | case DW_FORM_ref1: |
| 4569 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); |
| 4570 | info_ptr += 1; |
| 4571 | break; |
| 4572 | case DW_FORM_ref2: |
| 4573 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); |
| 4574 | info_ptr += 2; |
| 4575 | break; |
| 4576 | case DW_FORM_ref4: |
| 4577 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); |
| 4578 | info_ptr += 4; |
| 4579 | break; |
| 4580 | case DW_FORM_ref8: |
| 4581 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); |
| 4582 | info_ptr += 8; |
| 4583 | break; |
| 4584 | case DW_FORM_ref_udata: |
| 4585 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 4586 | info_ptr += bytes_read; |
| 4587 | break; |
| 4588 | case DW_FORM_indirect: |
| 4589 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 4590 | info_ptr += bytes_read; |
| 4591 | info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu); |
| 4592 | break; |
| 4593 | default: |
| 4594 | error ("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]", |
| 4595 | dwarf_form_name (form), |
| 4596 | bfd_get_filename (abfd)); |
| 4597 | } |
| 4598 | return info_ptr; |
| 4599 | } |
| 4600 | |
| 4601 | /* Read an attribute described by an abbreviated attribute. */ |
| 4602 | |
| 4603 | static char * |
| 4604 | read_attribute (struct attribute *attr, struct attr_abbrev *abbrev, |
| 4605 | bfd *abfd, char *info_ptr, struct dwarf2_cu *cu) |
| 4606 | { |
| 4607 | attr->name = abbrev->name; |
| 4608 | return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu); |
| 4609 | } |
| 4610 | |
| 4611 | /* read dwarf information from a buffer */ |
| 4612 | |
| 4613 | static unsigned int |
| 4614 | read_1_byte (bfd *abfd, char *buf) |
| 4615 | { |
| 4616 | return bfd_get_8 (abfd, (bfd_byte *) buf); |
| 4617 | } |
| 4618 | |
| 4619 | static int |
| 4620 | read_1_signed_byte (bfd *abfd, char *buf) |
| 4621 | { |
| 4622 | return bfd_get_signed_8 (abfd, (bfd_byte *) buf); |
| 4623 | } |
| 4624 | |
| 4625 | static unsigned int |
| 4626 | read_2_bytes (bfd *abfd, char *buf) |
| 4627 | { |
| 4628 | return bfd_get_16 (abfd, (bfd_byte *) buf); |
| 4629 | } |
| 4630 | |
| 4631 | static int |
| 4632 | read_2_signed_bytes (bfd *abfd, char *buf) |
| 4633 | { |
| 4634 | return bfd_get_signed_16 (abfd, (bfd_byte *) buf); |
| 4635 | } |
| 4636 | |
| 4637 | static unsigned int |
| 4638 | read_4_bytes (bfd *abfd, char *buf) |
| 4639 | { |
| 4640 | return bfd_get_32 (abfd, (bfd_byte *) buf); |
| 4641 | } |
| 4642 | |
| 4643 | static int |
| 4644 | read_4_signed_bytes (bfd *abfd, char *buf) |
| 4645 | { |
| 4646 | return bfd_get_signed_32 (abfd, (bfd_byte *) buf); |
| 4647 | } |
| 4648 | |
| 4649 | static unsigned long |
| 4650 | read_8_bytes (bfd *abfd, char *buf) |
| 4651 | { |
| 4652 | return bfd_get_64 (abfd, (bfd_byte *) buf); |
| 4653 | } |
| 4654 | |
| 4655 | static CORE_ADDR |
| 4656 | read_address (bfd *abfd, char *buf, struct dwarf2_cu *cu, int *bytes_read) |
| 4657 | { |
| 4658 | struct comp_unit_head *cu_header = &cu->header; |
| 4659 | CORE_ADDR retval = 0; |
| 4660 | |
| 4661 | if (cu_header->signed_addr_p) |
| 4662 | { |
| 4663 | switch (cu_header->addr_size) |
| 4664 | { |
| 4665 | case 2: |
| 4666 | retval = bfd_get_signed_16 (abfd, (bfd_byte *) buf); |
| 4667 | break; |
| 4668 | case 4: |
| 4669 | retval = bfd_get_signed_32 (abfd, (bfd_byte *) buf); |
| 4670 | break; |
| 4671 | case 8: |
| 4672 | retval = bfd_get_signed_64 (abfd, (bfd_byte *) buf); |
| 4673 | break; |
| 4674 | default: |
| 4675 | internal_error (__FILE__, __LINE__, |
| 4676 | "read_address: bad switch, signed [in module %s]", |
| 4677 | bfd_get_filename (abfd)); |
| 4678 | } |
| 4679 | } |
| 4680 | else |
| 4681 | { |
| 4682 | switch (cu_header->addr_size) |
| 4683 | { |
| 4684 | case 2: |
| 4685 | retval = bfd_get_16 (abfd, (bfd_byte *) buf); |
| 4686 | break; |
| 4687 | case 4: |
| 4688 | retval = bfd_get_32 (abfd, (bfd_byte *) buf); |
| 4689 | break; |
| 4690 | case 8: |
| 4691 | retval = bfd_get_64 (abfd, (bfd_byte *) buf); |
| 4692 | break; |
| 4693 | default: |
| 4694 | internal_error (__FILE__, __LINE__, |
| 4695 | "read_address: bad switch, unsigned [in module %s]", |
| 4696 | bfd_get_filename (abfd)); |
| 4697 | } |
| 4698 | } |
| 4699 | |
| 4700 | *bytes_read = cu_header->addr_size; |
| 4701 | return retval; |
| 4702 | } |
| 4703 | |
| 4704 | /* Read the initial length from a section. The (draft) DWARF 3 |
| 4705 | specification allows the initial length to take up either 4 bytes |
| 4706 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 |
| 4707 | bytes describe the length and all offsets will be 8 bytes in length |
| 4708 | instead of 4. |
| 4709 | |
| 4710 | An older, non-standard 64-bit format is also handled by this |
| 4711 | function. The older format in question stores the initial length |
| 4712 | as an 8-byte quantity without an escape value. Lengths greater |
| 4713 | than 2^32 aren't very common which means that the initial 4 bytes |
| 4714 | is almost always zero. Since a length value of zero doesn't make |
| 4715 | sense for the 32-bit format, this initial zero can be considered to |
| 4716 | be an escape value which indicates the presence of the older 64-bit |
| 4717 | format. As written, the code can't detect (old format) lengths |
| 4718 | greater than 4GB. If it becomes necessary to handle lengths somewhat |
| 4719 | larger than 4GB, we could allow other small values (such as the |
| 4720 | non-sensical values of 1, 2, and 3) to also be used as escape values |
| 4721 | indicating the presence of the old format. |
| 4722 | |
| 4723 | The value returned via bytes_read should be used to increment |
| 4724 | the relevant pointer after calling read_initial_length(). |
| 4725 | |
| 4726 | As a side effect, this function sets the fields initial_length_size |
| 4727 | and offset_size in cu_header to the values appropriate for the |
| 4728 | length field. (The format of the initial length field determines |
| 4729 | the width of file offsets to be fetched later with fetch_offset().) |
| 4730 | |
| 4731 | [ Note: read_initial_length() and read_offset() are based on the |
| 4732 | document entitled "DWARF Debugging Information Format", revision |
| 4733 | 3, draft 8, dated November 19, 2001. This document was obtained |
| 4734 | from: |
| 4735 | |
| 4736 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
| 4737 | |
| 4738 | This document is only a draft and is subject to change. (So beware.) |
| 4739 | |
| 4740 | Details regarding the older, non-standard 64-bit format were |
| 4741 | determined empirically by examining 64-bit ELF files produced |
| 4742 | by the SGI toolchain on an IRIX 6.5 machine. |
| 4743 | |
| 4744 | - Kevin, July 16, 2002 |
| 4745 | ] */ |
| 4746 | |
| 4747 | static LONGEST |
| 4748 | read_initial_length (bfd *abfd, char *buf, struct comp_unit_head *cu_header, |
| 4749 | int *bytes_read) |
| 4750 | { |
| 4751 | LONGEST retval = 0; |
| 4752 | |
| 4753 | retval = bfd_get_32 (abfd, (bfd_byte *) buf); |
| 4754 | |
| 4755 | if (retval == 0xffffffff) |
| 4756 | { |
| 4757 | retval = bfd_get_64 (abfd, (bfd_byte *) buf + 4); |
| 4758 | *bytes_read = 12; |
| 4759 | if (cu_header != NULL) |
| 4760 | { |
| 4761 | cu_header->initial_length_size = 12; |
| 4762 | cu_header->offset_size = 8; |
| 4763 | } |
| 4764 | } |
| 4765 | else if (retval == 0) |
| 4766 | { |
| 4767 | /* Handle (non-standard) 64-bit DWARF2 formats such as that used |
| 4768 | by IRIX. */ |
| 4769 | retval = bfd_get_64 (abfd, (bfd_byte *) buf); |
| 4770 | *bytes_read = 8; |
| 4771 | if (cu_header != NULL) |
| 4772 | { |
| 4773 | cu_header->initial_length_size = 8; |
| 4774 | cu_header->offset_size = 8; |
| 4775 | } |
| 4776 | } |
| 4777 | else |
| 4778 | { |
| 4779 | *bytes_read = 4; |
| 4780 | if (cu_header != NULL) |
| 4781 | { |
| 4782 | cu_header->initial_length_size = 4; |
| 4783 | cu_header->offset_size = 4; |
| 4784 | } |
| 4785 | } |
| 4786 | |
| 4787 | return retval; |
| 4788 | } |
| 4789 | |
| 4790 | /* Read an offset from the data stream. The size of the offset is |
| 4791 | given by cu_header->offset_size. */ |
| 4792 | |
| 4793 | static LONGEST |
| 4794 | read_offset (bfd *abfd, char *buf, const struct comp_unit_head *cu_header, |
| 4795 | int *bytes_read) |
| 4796 | { |
| 4797 | LONGEST retval = 0; |
| 4798 | |
| 4799 | switch (cu_header->offset_size) |
| 4800 | { |
| 4801 | case 4: |
| 4802 | retval = bfd_get_32 (abfd, (bfd_byte *) buf); |
| 4803 | *bytes_read = 4; |
| 4804 | break; |
| 4805 | case 8: |
| 4806 | retval = bfd_get_64 (abfd, (bfd_byte *) buf); |
| 4807 | *bytes_read = 8; |
| 4808 | break; |
| 4809 | default: |
| 4810 | internal_error (__FILE__, __LINE__, |
| 4811 | "read_offset: bad switch [in module %s]", |
| 4812 | bfd_get_filename (abfd)); |
| 4813 | } |
| 4814 | |
| 4815 | return retval; |
| 4816 | } |
| 4817 | |
| 4818 | static char * |
| 4819 | read_n_bytes (bfd *abfd, char *buf, unsigned int size) |
| 4820 | { |
| 4821 | /* If the size of a host char is 8 bits, we can return a pointer |
| 4822 | to the buffer, otherwise we have to copy the data to a buffer |
| 4823 | allocated on the temporary obstack. */ |
| 4824 | gdb_assert (HOST_CHAR_BIT == 8); |
| 4825 | return buf; |
| 4826 | } |
| 4827 | |
| 4828 | static char * |
| 4829 | read_string (bfd *abfd, char *buf, unsigned int *bytes_read_ptr) |
| 4830 | { |
| 4831 | /* If the size of a host char is 8 bits, we can return a pointer |
| 4832 | to the string, otherwise we have to copy the string to a buffer |
| 4833 | allocated on the temporary obstack. */ |
| 4834 | gdb_assert (HOST_CHAR_BIT == 8); |
| 4835 | if (*buf == '\0') |
| 4836 | { |
| 4837 | *bytes_read_ptr = 1; |
| 4838 | return NULL; |
| 4839 | } |
| 4840 | *bytes_read_ptr = strlen (buf) + 1; |
| 4841 | return buf; |
| 4842 | } |
| 4843 | |
| 4844 | static char * |
| 4845 | read_indirect_string (bfd *abfd, char *buf, |
| 4846 | const struct comp_unit_head *cu_header, |
| 4847 | unsigned int *bytes_read_ptr) |
| 4848 | { |
| 4849 | LONGEST str_offset = read_offset (abfd, buf, cu_header, |
| 4850 | (int *) bytes_read_ptr); |
| 4851 | |
| 4852 | if (dwarf_str_buffer == NULL) |
| 4853 | { |
| 4854 | error ("DW_FORM_strp used without .debug_str section [in module %s]", |
| 4855 | bfd_get_filename (abfd)); |
| 4856 | return NULL; |
| 4857 | } |
| 4858 | if (str_offset >= dwarf_str_size) |
| 4859 | { |
| 4860 | error ("DW_FORM_strp pointing outside of .debug_str section [in module %s]", |
| 4861 | bfd_get_filename (abfd)); |
| 4862 | return NULL; |
| 4863 | } |
| 4864 | gdb_assert (HOST_CHAR_BIT == 8); |
| 4865 | if (dwarf_str_buffer[str_offset] == '\0') |
| 4866 | return NULL; |
| 4867 | return dwarf_str_buffer + str_offset; |
| 4868 | } |
| 4869 | |
| 4870 | static unsigned long |
| 4871 | read_unsigned_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr) |
| 4872 | { |
| 4873 | unsigned long result; |
| 4874 | unsigned int num_read; |
| 4875 | int i, shift; |
| 4876 | unsigned char byte; |
| 4877 | |
| 4878 | result = 0; |
| 4879 | shift = 0; |
| 4880 | num_read = 0; |
| 4881 | i = 0; |
| 4882 | while (1) |
| 4883 | { |
| 4884 | byte = bfd_get_8 (abfd, (bfd_byte *) buf); |
| 4885 | buf++; |
| 4886 | num_read++; |
| 4887 | result |= ((unsigned long)(byte & 127) << shift); |
| 4888 | if ((byte & 128) == 0) |
| 4889 | { |
| 4890 | break; |
| 4891 | } |
| 4892 | shift += 7; |
| 4893 | } |
| 4894 | *bytes_read_ptr = num_read; |
| 4895 | return result; |
| 4896 | } |
| 4897 | |
| 4898 | static long |
| 4899 | read_signed_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr) |
| 4900 | { |
| 4901 | long result; |
| 4902 | int i, shift, size, num_read; |
| 4903 | unsigned char byte; |
| 4904 | |
| 4905 | result = 0; |
| 4906 | shift = 0; |
| 4907 | size = 32; |
| 4908 | num_read = 0; |
| 4909 | i = 0; |
| 4910 | while (1) |
| 4911 | { |
| 4912 | byte = bfd_get_8 (abfd, (bfd_byte *) buf); |
| 4913 | buf++; |
| 4914 | num_read++; |
| 4915 | result |= ((long)(byte & 127) << shift); |
| 4916 | shift += 7; |
| 4917 | if ((byte & 128) == 0) |
| 4918 | { |
| 4919 | break; |
| 4920 | } |
| 4921 | } |
| 4922 | if ((shift < size) && (byte & 0x40)) |
| 4923 | { |
| 4924 | result |= -(1 << shift); |
| 4925 | } |
| 4926 | *bytes_read_ptr = num_read; |
| 4927 | return result; |
| 4928 | } |
| 4929 | |
| 4930 | static void |
| 4931 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
| 4932 | { |
| 4933 | switch (lang) |
| 4934 | { |
| 4935 | case DW_LANG_C89: |
| 4936 | case DW_LANG_C: |
| 4937 | cu->language = language_c; |
| 4938 | break; |
| 4939 | case DW_LANG_C_plus_plus: |
| 4940 | cu->language = language_cplus; |
| 4941 | break; |
| 4942 | case DW_LANG_Fortran77: |
| 4943 | case DW_LANG_Fortran90: |
| 4944 | case DW_LANG_Fortran95: |
| 4945 | cu->language = language_fortran; |
| 4946 | break; |
| 4947 | case DW_LANG_Mips_Assembler: |
| 4948 | cu->language = language_asm; |
| 4949 | break; |
| 4950 | case DW_LANG_Java: |
| 4951 | cu->language = language_java; |
| 4952 | break; |
| 4953 | case DW_LANG_Ada83: |
| 4954 | case DW_LANG_Ada95: |
| 4955 | case DW_LANG_Cobol74: |
| 4956 | case DW_LANG_Cobol85: |
| 4957 | case DW_LANG_Pascal83: |
| 4958 | case DW_LANG_Modula2: |
| 4959 | default: |
| 4960 | cu->language = language_minimal; |
| 4961 | break; |
| 4962 | } |
| 4963 | cu->language_defn = language_def (cu->language); |
| 4964 | } |
| 4965 | |
| 4966 | /* Return the named attribute or NULL if not there. */ |
| 4967 | |
| 4968 | static struct attribute * |
| 4969 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
| 4970 | { |
| 4971 | unsigned int i; |
| 4972 | struct attribute *spec = NULL; |
| 4973 | |
| 4974 | for (i = 0; i < die->num_attrs; ++i) |
| 4975 | { |
| 4976 | if (die->attrs[i].name == name) |
| 4977 | { |
| 4978 | return &die->attrs[i]; |
| 4979 | } |
| 4980 | if (die->attrs[i].name == DW_AT_specification |
| 4981 | || die->attrs[i].name == DW_AT_abstract_origin) |
| 4982 | spec = &die->attrs[i]; |
| 4983 | } |
| 4984 | if (spec) |
| 4985 | { |
| 4986 | struct die_info *ref_die = |
| 4987 | follow_die_ref (dwarf2_get_ref_die_offset (spec, cu)); |
| 4988 | |
| 4989 | if (ref_die) |
| 4990 | return dwarf2_attr (ref_die, name, cu); |
| 4991 | } |
| 4992 | |
| 4993 | return NULL; |
| 4994 | } |
| 4995 | |
| 4996 | static int |
| 4997 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
| 4998 | { |
| 4999 | return (dwarf2_attr (die, DW_AT_declaration, cu) |
| 5000 | && ! dwarf2_attr (die, DW_AT_specification, cu)); |
| 5001 | } |
| 5002 | |
| 5003 | /* Return the die giving the specification for DIE, if there is |
| 5004 | one. */ |
| 5005 | |
| 5006 | static struct die_info * |
| 5007 | die_specification (struct die_info *die, struct dwarf2_cu *cu) |
| 5008 | { |
| 5009 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, cu); |
| 5010 | |
| 5011 | if (spec_attr == NULL) |
| 5012 | return NULL; |
| 5013 | else |
| 5014 | return follow_die_ref (dwarf2_get_ref_die_offset (spec_attr, cu)); |
| 5015 | } |
| 5016 | |
| 5017 | /* Free the line_header structure *LH, and any arrays and strings it |
| 5018 | refers to. */ |
| 5019 | static void |
| 5020 | free_line_header (struct line_header *lh) |
| 5021 | { |
| 5022 | if (lh->standard_opcode_lengths) |
| 5023 | xfree (lh->standard_opcode_lengths); |
| 5024 | |
| 5025 | /* Remember that all the lh->file_names[i].name pointers are |
| 5026 | pointers into debug_line_buffer, and don't need to be freed. */ |
| 5027 | if (lh->file_names) |
| 5028 | xfree (lh->file_names); |
| 5029 | |
| 5030 | /* Similarly for the include directory names. */ |
| 5031 | if (lh->include_dirs) |
| 5032 | xfree (lh->include_dirs); |
| 5033 | |
| 5034 | xfree (lh); |
| 5035 | } |
| 5036 | |
| 5037 | |
| 5038 | /* Add an entry to LH's include directory table. */ |
| 5039 | static void |
| 5040 | add_include_dir (struct line_header *lh, char *include_dir) |
| 5041 | { |
| 5042 | /* Grow the array if necessary. */ |
| 5043 | if (lh->include_dirs_size == 0) |
| 5044 | { |
| 5045 | lh->include_dirs_size = 1; /* for testing */ |
| 5046 | lh->include_dirs = xmalloc (lh->include_dirs_size |
| 5047 | * sizeof (*lh->include_dirs)); |
| 5048 | } |
| 5049 | else if (lh->num_include_dirs >= lh->include_dirs_size) |
| 5050 | { |
| 5051 | lh->include_dirs_size *= 2; |
| 5052 | lh->include_dirs = xrealloc (lh->include_dirs, |
| 5053 | (lh->include_dirs_size |
| 5054 | * sizeof (*lh->include_dirs))); |
| 5055 | } |
| 5056 | |
| 5057 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
| 5058 | } |
| 5059 | |
| 5060 | |
| 5061 | /* Add an entry to LH's file name table. */ |
| 5062 | static void |
| 5063 | add_file_name (struct line_header *lh, |
| 5064 | char *name, |
| 5065 | unsigned int dir_index, |
| 5066 | unsigned int mod_time, |
| 5067 | unsigned int length) |
| 5068 | { |
| 5069 | struct file_entry *fe; |
| 5070 | |
| 5071 | /* Grow the array if necessary. */ |
| 5072 | if (lh->file_names_size == 0) |
| 5073 | { |
| 5074 | lh->file_names_size = 1; /* for testing */ |
| 5075 | lh->file_names = xmalloc (lh->file_names_size |
| 5076 | * sizeof (*lh->file_names)); |
| 5077 | } |
| 5078 | else if (lh->num_file_names >= lh->file_names_size) |
| 5079 | { |
| 5080 | lh->file_names_size *= 2; |
| 5081 | lh->file_names = xrealloc (lh->file_names, |
| 5082 | (lh->file_names_size |
| 5083 | * sizeof (*lh->file_names))); |
| 5084 | } |
| 5085 | |
| 5086 | fe = &lh->file_names[lh->num_file_names++]; |
| 5087 | fe->name = name; |
| 5088 | fe->dir_index = dir_index; |
| 5089 | fe->mod_time = mod_time; |
| 5090 | fe->length = length; |
| 5091 | } |
| 5092 | |
| 5093 | |
| 5094 | /* Read the statement program header starting at OFFSET in |
| 5095 | dwarf_line_buffer, according to the endianness of ABFD. Return a |
| 5096 | pointer to a struct line_header, allocated using xmalloc. |
| 5097 | |
| 5098 | NOTE: the strings in the include directory and file name tables of |
| 5099 | the returned object point into debug_line_buffer, and must not be |
| 5100 | freed. */ |
| 5101 | static struct line_header * |
| 5102 | dwarf_decode_line_header (unsigned int offset, bfd *abfd, |
| 5103 | struct dwarf2_cu *cu) |
| 5104 | { |
| 5105 | struct cleanup *back_to; |
| 5106 | struct line_header *lh; |
| 5107 | char *line_ptr; |
| 5108 | int bytes_read; |
| 5109 | int i; |
| 5110 | char *cur_dir, *cur_file; |
| 5111 | |
| 5112 | if (dwarf_line_buffer == NULL) |
| 5113 | { |
| 5114 | complaint (&symfile_complaints, "missing .debug_line section"); |
| 5115 | return 0; |
| 5116 | } |
| 5117 | |
| 5118 | /* Make sure that at least there's room for the total_length field. That |
| 5119 | could be 12 bytes long, but we're just going to fudge that. */ |
| 5120 | if (offset + 4 >= dwarf_line_size) |
| 5121 | { |
| 5122 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
| 5123 | return 0; |
| 5124 | } |
| 5125 | |
| 5126 | lh = xmalloc (sizeof (*lh)); |
| 5127 | memset (lh, 0, sizeof (*lh)); |
| 5128 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, |
| 5129 | (void *) lh); |
| 5130 | |
| 5131 | line_ptr = dwarf_line_buffer + offset; |
| 5132 | |
| 5133 | /* read in the header */ |
| 5134 | lh->total_length = read_initial_length (abfd, line_ptr, NULL, &bytes_read); |
| 5135 | line_ptr += bytes_read; |
| 5136 | if (line_ptr + lh->total_length > dwarf_line_buffer + dwarf_line_size) |
| 5137 | { |
| 5138 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
| 5139 | return 0; |
| 5140 | } |
| 5141 | lh->statement_program_end = line_ptr + lh->total_length; |
| 5142 | lh->version = read_2_bytes (abfd, line_ptr); |
| 5143 | line_ptr += 2; |
| 5144 | lh->header_length = read_offset (abfd, line_ptr, &cu->header, &bytes_read); |
| 5145 | line_ptr += bytes_read; |
| 5146 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
| 5147 | line_ptr += 1; |
| 5148 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
| 5149 | line_ptr += 1; |
| 5150 | lh->line_base = read_1_signed_byte (abfd, line_ptr); |
| 5151 | line_ptr += 1; |
| 5152 | lh->line_range = read_1_byte (abfd, line_ptr); |
| 5153 | line_ptr += 1; |
| 5154 | lh->opcode_base = read_1_byte (abfd, line_ptr); |
| 5155 | line_ptr += 1; |
| 5156 | lh->standard_opcode_lengths |
| 5157 | = (unsigned char *) xmalloc (lh->opcode_base * sizeof (unsigned char)); |
| 5158 | |
| 5159 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ |
| 5160 | for (i = 1; i < lh->opcode_base; ++i) |
| 5161 | { |
| 5162 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); |
| 5163 | line_ptr += 1; |
| 5164 | } |
| 5165 | |
| 5166 | /* Read directory table */ |
| 5167 | while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
| 5168 | { |
| 5169 | line_ptr += bytes_read; |
| 5170 | add_include_dir (lh, cur_dir); |
| 5171 | } |
| 5172 | line_ptr += bytes_read; |
| 5173 | |
| 5174 | /* Read file name table */ |
| 5175 | while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
| 5176 | { |
| 5177 | unsigned int dir_index, mod_time, length; |
| 5178 | |
| 5179 | line_ptr += bytes_read; |
| 5180 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 5181 | line_ptr += bytes_read; |
| 5182 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 5183 | line_ptr += bytes_read; |
| 5184 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 5185 | line_ptr += bytes_read; |
| 5186 | |
| 5187 | add_file_name (lh, cur_file, dir_index, mod_time, length); |
| 5188 | } |
| 5189 | line_ptr += bytes_read; |
| 5190 | lh->statement_program_start = line_ptr; |
| 5191 | |
| 5192 | if (line_ptr > dwarf_line_buffer + dwarf_line_size) |
| 5193 | complaint (&symfile_complaints, |
| 5194 | "line number info header doesn't fit in `.debug_line' section"); |
| 5195 | |
| 5196 | discard_cleanups (back_to); |
| 5197 | return lh; |
| 5198 | } |
| 5199 | |
| 5200 | /* This function exists to work around a bug in certain compilers |
| 5201 | (particularly GCC 2.95), in which the first line number marker of a |
| 5202 | function does not show up until after the prologue, right before |
| 5203 | the second line number marker. This function shifts ADDRESS down |
| 5204 | to the beginning of the function if necessary, and is called on |
| 5205 | addresses passed to record_line. */ |
| 5206 | |
| 5207 | static CORE_ADDR |
| 5208 | check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu) |
| 5209 | { |
| 5210 | struct function_range *fn; |
| 5211 | |
| 5212 | /* Find the function_range containing address. */ |
| 5213 | if (!cu->first_fn) |
| 5214 | return address; |
| 5215 | |
| 5216 | if (!cu->cached_fn) |
| 5217 | cu->cached_fn = cu->first_fn; |
| 5218 | |
| 5219 | fn = cu->cached_fn; |
| 5220 | while (fn) |
| 5221 | if (fn->lowpc <= address && fn->highpc > address) |
| 5222 | goto found; |
| 5223 | else |
| 5224 | fn = fn->next; |
| 5225 | |
| 5226 | fn = cu->first_fn; |
| 5227 | while (fn && fn != cu->cached_fn) |
| 5228 | if (fn->lowpc <= address && fn->highpc > address) |
| 5229 | goto found; |
| 5230 | else |
| 5231 | fn = fn->next; |
| 5232 | |
| 5233 | return address; |
| 5234 | |
| 5235 | found: |
| 5236 | if (fn->seen_line) |
| 5237 | return address; |
| 5238 | if (address != fn->lowpc) |
| 5239 | complaint (&symfile_complaints, |
| 5240 | "misplaced first line number at 0x%lx for '%s'", |
| 5241 | (unsigned long) address, fn->name); |
| 5242 | fn->seen_line = 1; |
| 5243 | return fn->lowpc; |
| 5244 | } |
| 5245 | |
| 5246 | /* Decode the line number information for the compilation unit whose |
| 5247 | line number info is at OFFSET in the .debug_line section. |
| 5248 | The compilation directory of the file is passed in COMP_DIR. */ |
| 5249 | |
| 5250 | static void |
| 5251 | dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd, |
| 5252 | struct dwarf2_cu *cu) |
| 5253 | { |
| 5254 | char *line_ptr; |
| 5255 | char *line_end; |
| 5256 | unsigned int bytes_read; |
| 5257 | unsigned char op_code, extended_op, adj_opcode; |
| 5258 | CORE_ADDR baseaddr; |
| 5259 | struct objfile *objfile = cu->objfile; |
| 5260 | |
| 5261 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 5262 | |
| 5263 | line_ptr = lh->statement_program_start; |
| 5264 | line_end = lh->statement_program_end; |
| 5265 | |
| 5266 | /* Read the statement sequences until there's nothing left. */ |
| 5267 | while (line_ptr < line_end) |
| 5268 | { |
| 5269 | /* state machine registers */ |
| 5270 | CORE_ADDR address = 0; |
| 5271 | unsigned int file = 1; |
| 5272 | unsigned int line = 1; |
| 5273 | unsigned int column = 0; |
| 5274 | int is_stmt = lh->default_is_stmt; |
| 5275 | int basic_block = 0; |
| 5276 | int end_sequence = 0; |
| 5277 | |
| 5278 | /* Start a subfile for the current file of the state machine. */ |
| 5279 | if (lh->num_file_names >= file) |
| 5280 | { |
| 5281 | /* lh->include_dirs and lh->file_names are 0-based, but the |
| 5282 | directory and file name numbers in the statement program |
| 5283 | are 1-based. */ |
| 5284 | struct file_entry *fe = &lh->file_names[file - 1]; |
| 5285 | char *dir; |
| 5286 | if (fe->dir_index) |
| 5287 | dir = lh->include_dirs[fe->dir_index - 1]; |
| 5288 | else |
| 5289 | dir = comp_dir; |
| 5290 | dwarf2_start_subfile (fe->name, dir); |
| 5291 | } |
| 5292 | |
| 5293 | /* Decode the table. */ |
| 5294 | while (!end_sequence) |
| 5295 | { |
| 5296 | op_code = read_1_byte (abfd, line_ptr); |
| 5297 | line_ptr += 1; |
| 5298 | |
| 5299 | if (op_code >= lh->opcode_base) |
| 5300 | { /* Special operand. */ |
| 5301 | adj_opcode = op_code - lh->opcode_base; |
| 5302 | address += (adj_opcode / lh->line_range) |
| 5303 | * lh->minimum_instruction_length; |
| 5304 | line += lh->line_base + (adj_opcode % lh->line_range); |
| 5305 | /* append row to matrix using current values */ |
| 5306 | record_line (current_subfile, line, |
| 5307 | check_cu_functions (address, cu)); |
| 5308 | basic_block = 1; |
| 5309 | } |
| 5310 | else switch (op_code) |
| 5311 | { |
| 5312 | case DW_LNS_extended_op: |
| 5313 | line_ptr += 1; /* ignore length */ |
| 5314 | extended_op = read_1_byte (abfd, line_ptr); |
| 5315 | line_ptr += 1; |
| 5316 | switch (extended_op) |
| 5317 | { |
| 5318 | case DW_LNE_end_sequence: |
| 5319 | end_sequence = 1; |
| 5320 | record_line (current_subfile, 0, address); |
| 5321 | break; |
| 5322 | case DW_LNE_set_address: |
| 5323 | address = read_address (abfd, line_ptr, cu, &bytes_read); |
| 5324 | line_ptr += bytes_read; |
| 5325 | address += baseaddr; |
| 5326 | break; |
| 5327 | case DW_LNE_define_file: |
| 5328 | { |
| 5329 | char *cur_file; |
| 5330 | unsigned int dir_index, mod_time, length; |
| 5331 | |
| 5332 | cur_file = read_string (abfd, line_ptr, &bytes_read); |
| 5333 | line_ptr += bytes_read; |
| 5334 | dir_index = |
| 5335 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 5336 | line_ptr += bytes_read; |
| 5337 | mod_time = |
| 5338 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 5339 | line_ptr += bytes_read; |
| 5340 | length = |
| 5341 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 5342 | line_ptr += bytes_read; |
| 5343 | add_file_name (lh, cur_file, dir_index, mod_time, length); |
| 5344 | } |
| 5345 | break; |
| 5346 | default: |
| 5347 | complaint (&symfile_complaints, |
| 5348 | "mangled .debug_line section"); |
| 5349 | return; |
| 5350 | } |
| 5351 | break; |
| 5352 | case DW_LNS_copy: |
| 5353 | record_line (current_subfile, line, |
| 5354 | check_cu_functions (address, cu)); |
| 5355 | basic_block = 0; |
| 5356 | break; |
| 5357 | case DW_LNS_advance_pc: |
| 5358 | address += lh->minimum_instruction_length |
| 5359 | * read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 5360 | line_ptr += bytes_read; |
| 5361 | break; |
| 5362 | case DW_LNS_advance_line: |
| 5363 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); |
| 5364 | line_ptr += bytes_read; |
| 5365 | break; |
| 5366 | case DW_LNS_set_file: |
| 5367 | { |
| 5368 | /* lh->include_dirs and lh->file_names are 0-based, |
| 5369 | but the directory and file name numbers in the |
| 5370 | statement program are 1-based. */ |
| 5371 | struct file_entry *fe; |
| 5372 | char *dir; |
| 5373 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 5374 | line_ptr += bytes_read; |
| 5375 | fe = &lh->file_names[file - 1]; |
| 5376 | if (fe->dir_index) |
| 5377 | dir = lh->include_dirs[fe->dir_index - 1]; |
| 5378 | else |
| 5379 | dir = comp_dir; |
| 5380 | dwarf2_start_subfile (fe->name, dir); |
| 5381 | } |
| 5382 | break; |
| 5383 | case DW_LNS_set_column: |
| 5384 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 5385 | line_ptr += bytes_read; |
| 5386 | break; |
| 5387 | case DW_LNS_negate_stmt: |
| 5388 | is_stmt = (!is_stmt); |
| 5389 | break; |
| 5390 | case DW_LNS_set_basic_block: |
| 5391 | basic_block = 1; |
| 5392 | break; |
| 5393 | /* Add to the address register of the state machine the |
| 5394 | address increment value corresponding to special opcode |
| 5395 | 255. Ie, this value is scaled by the minimum instruction |
| 5396 | length since special opcode 255 would have scaled the |
| 5397 | the increment. */ |
| 5398 | case DW_LNS_const_add_pc: |
| 5399 | address += (lh->minimum_instruction_length |
| 5400 | * ((255 - lh->opcode_base) / lh->line_range)); |
| 5401 | break; |
| 5402 | case DW_LNS_fixed_advance_pc: |
| 5403 | address += read_2_bytes (abfd, line_ptr); |
| 5404 | line_ptr += 2; |
| 5405 | break; |
| 5406 | default: |
| 5407 | { /* Unknown standard opcode, ignore it. */ |
| 5408 | int i; |
| 5409 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
| 5410 | { |
| 5411 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 5412 | line_ptr += bytes_read; |
| 5413 | } |
| 5414 | } |
| 5415 | } |
| 5416 | } |
| 5417 | } |
| 5418 | } |
| 5419 | |
| 5420 | /* Start a subfile for DWARF. FILENAME is the name of the file and |
| 5421 | DIRNAME the name of the source directory which contains FILENAME |
| 5422 | or NULL if not known. |
| 5423 | This routine tries to keep line numbers from identical absolute and |
| 5424 | relative file names in a common subfile. |
| 5425 | |
| 5426 | Using the `list' example from the GDB testsuite, which resides in |
| 5427 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename |
| 5428 | of /srcdir/list0.c yields the following debugging information for list0.c: |
| 5429 | |
| 5430 | DW_AT_name: /srcdir/list0.c |
| 5431 | DW_AT_comp_dir: /compdir |
| 5432 | files.files[0].name: list0.h |
| 5433 | files.files[0].dir: /srcdir |
| 5434 | files.files[1].name: list0.c |
| 5435 | files.files[1].dir: /srcdir |
| 5436 | |
| 5437 | The line number information for list0.c has to end up in a single |
| 5438 | subfile, so that `break /srcdir/list0.c:1' works as expected. */ |
| 5439 | |
| 5440 | static void |
| 5441 | dwarf2_start_subfile (char *filename, char *dirname) |
| 5442 | { |
| 5443 | /* If the filename isn't absolute, try to match an existing subfile |
| 5444 | with the full pathname. */ |
| 5445 | |
| 5446 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
| 5447 | { |
| 5448 | struct subfile *subfile; |
| 5449 | char *fullname = concat (dirname, "/", filename, NULL); |
| 5450 | |
| 5451 | for (subfile = subfiles; subfile; subfile = subfile->next) |
| 5452 | { |
| 5453 | if (FILENAME_CMP (subfile->name, fullname) == 0) |
| 5454 | { |
| 5455 | current_subfile = subfile; |
| 5456 | xfree (fullname); |
| 5457 | return; |
| 5458 | } |
| 5459 | } |
| 5460 | xfree (fullname); |
| 5461 | } |
| 5462 | start_subfile (filename, dirname); |
| 5463 | } |
| 5464 | |
| 5465 | static void |
| 5466 | var_decode_location (struct attribute *attr, struct symbol *sym, |
| 5467 | struct dwarf2_cu *cu) |
| 5468 | { |
| 5469 | struct objfile *objfile = cu->objfile; |
| 5470 | struct comp_unit_head *cu_header = &cu->header; |
| 5471 | |
| 5472 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
| 5473 | code here to turn a symbol with DW_AT_external and a |
| 5474 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was |
| 5475 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux |
| 5476 | with some versions of binutils) where shared libraries could have |
| 5477 | relocations against symbols in their debug information - the |
| 5478 | minimal symbol would have the right address, but the debug info |
| 5479 | would not. It's no longer necessary, because we will explicitly |
| 5480 | apply relocations when we read in the debug information now. */ |
| 5481 | |
| 5482 | /* A DW_AT_location attribute with no contents indicates that a |
| 5483 | variable has been optimized away. */ |
| 5484 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) |
| 5485 | { |
| 5486 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; |
| 5487 | return; |
| 5488 | } |
| 5489 | |
| 5490 | /* Handle one degenerate form of location expression specially, to |
| 5491 | preserve GDB's previous behavior when section offsets are |
| 5492 | specified. If this is just a DW_OP_addr then mark this symbol |
| 5493 | as LOC_STATIC. */ |
| 5494 | |
| 5495 | if (attr_form_is_block (attr) |
| 5496 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size |
| 5497 | && DW_BLOCK (attr)->data[0] == DW_OP_addr) |
| 5498 | { |
| 5499 | int dummy; |
| 5500 | |
| 5501 | SYMBOL_VALUE_ADDRESS (sym) = |
| 5502 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); |
| 5503 | fixup_symbol_section (sym, objfile); |
| 5504 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, |
| 5505 | SYMBOL_SECTION (sym)); |
| 5506 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 5507 | return; |
| 5508 | } |
| 5509 | |
| 5510 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static |
| 5511 | expression evaluator, and use LOC_COMPUTED only when necessary |
| 5512 | (i.e. when the value of a register or memory location is |
| 5513 | referenced, or a thread-local block, etc.). Then again, it might |
| 5514 | not be worthwhile. I'm assuming that it isn't unless performance |
| 5515 | or memory numbers show me otherwise. */ |
| 5516 | |
| 5517 | dwarf2_symbol_mark_computed (attr, sym, cu); |
| 5518 | SYMBOL_CLASS (sym) = LOC_COMPUTED; |
| 5519 | } |
| 5520 | |
| 5521 | /* Given a pointer to a DWARF information entry, figure out if we need |
| 5522 | to make a symbol table entry for it, and if so, create a new entry |
| 5523 | and return a pointer to it. |
| 5524 | If TYPE is NULL, determine symbol type from the die, otherwise |
| 5525 | used the passed type. */ |
| 5526 | |
| 5527 | static struct symbol * |
| 5528 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
| 5529 | { |
| 5530 | struct objfile *objfile = cu->objfile; |
| 5531 | struct symbol *sym = NULL; |
| 5532 | char *name; |
| 5533 | struct attribute *attr = NULL; |
| 5534 | struct attribute *attr2 = NULL; |
| 5535 | CORE_ADDR baseaddr; |
| 5536 | |
| 5537 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 5538 | |
| 5539 | if (die->tag != DW_TAG_namespace) |
| 5540 | name = dwarf2_linkage_name (die, cu); |
| 5541 | else |
| 5542 | name = TYPE_NAME (type); |
| 5543 | |
| 5544 | if (name) |
| 5545 | { |
| 5546 | sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack, |
| 5547 | sizeof (struct symbol)); |
| 5548 | OBJSTAT (objfile, n_syms++); |
| 5549 | memset (sym, 0, sizeof (struct symbol)); |
| 5550 | |
| 5551 | /* Cache this symbol's name and the name's demangled form (if any). */ |
| 5552 | SYMBOL_LANGUAGE (sym) = cu->language; |
| 5553 | SYMBOL_SET_NAMES (sym, name, strlen (name), objfile); |
| 5554 | |
| 5555 | /* Default assumptions. |
| 5556 | Use the passed type or decode it from the die. */ |
| 5557 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 5558 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 5559 | if (type != NULL) |
| 5560 | SYMBOL_TYPE (sym) = type; |
| 5561 | else |
| 5562 | SYMBOL_TYPE (sym) = die_type (die, cu); |
| 5563 | attr = dwarf2_attr (die, DW_AT_decl_line, cu); |
| 5564 | if (attr) |
| 5565 | { |
| 5566 | SYMBOL_LINE (sym) = DW_UNSND (attr); |
| 5567 | } |
| 5568 | switch (die->tag) |
| 5569 | { |
| 5570 | case DW_TAG_label: |
| 5571 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
| 5572 | if (attr) |
| 5573 | { |
| 5574 | SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr; |
| 5575 | } |
| 5576 | SYMBOL_CLASS (sym) = LOC_LABEL; |
| 5577 | break; |
| 5578 | case DW_TAG_subprogram: |
| 5579 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by |
| 5580 | finish_block. */ |
| 5581 | SYMBOL_CLASS (sym) = LOC_BLOCK; |
| 5582 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
| 5583 | if (attr2 && (DW_UNSND (attr2) != 0)) |
| 5584 | { |
| 5585 | add_symbol_to_list (sym, &global_symbols); |
| 5586 | } |
| 5587 | else |
| 5588 | { |
| 5589 | add_symbol_to_list (sym, cu->list_in_scope); |
| 5590 | } |
| 5591 | break; |
| 5592 | case DW_TAG_variable: |
| 5593 | /* Compilation with minimal debug info may result in variables |
| 5594 | with missing type entries. Change the misleading `void' type |
| 5595 | to something sensible. */ |
| 5596 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
| 5597 | SYMBOL_TYPE (sym) = init_type (TYPE_CODE_INT, |
| 5598 | TARGET_INT_BIT / HOST_CHAR_BIT, 0, |
| 5599 | "<variable, no debug info>", |
| 5600 | objfile); |
| 5601 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
| 5602 | if (attr) |
| 5603 | { |
| 5604 | dwarf2_const_value (attr, sym, cu); |
| 5605 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
| 5606 | if (attr2 && (DW_UNSND (attr2) != 0)) |
| 5607 | add_symbol_to_list (sym, &global_symbols); |
| 5608 | else |
| 5609 | add_symbol_to_list (sym, cu->list_in_scope); |
| 5610 | break; |
| 5611 | } |
| 5612 | attr = dwarf2_attr (die, DW_AT_location, cu); |
| 5613 | if (attr) |
| 5614 | { |
| 5615 | var_decode_location (attr, sym, cu); |
| 5616 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
| 5617 | if (attr2 && (DW_UNSND (attr2) != 0)) |
| 5618 | add_symbol_to_list (sym, &global_symbols); |
| 5619 | else |
| 5620 | add_symbol_to_list (sym, cu->list_in_scope); |
| 5621 | } |
| 5622 | else |
| 5623 | { |
| 5624 | /* We do not know the address of this symbol. |
| 5625 | If it is an external symbol and we have type information |
| 5626 | for it, enter the symbol as a LOC_UNRESOLVED symbol. |
| 5627 | The address of the variable will then be determined from |
| 5628 | the minimal symbol table whenever the variable is |
| 5629 | referenced. */ |
| 5630 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
| 5631 | if (attr2 && (DW_UNSND (attr2) != 0) |
| 5632 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) |
| 5633 | { |
| 5634 | SYMBOL_CLASS (sym) = LOC_UNRESOLVED; |
| 5635 | add_symbol_to_list (sym, &global_symbols); |
| 5636 | } |
| 5637 | } |
| 5638 | break; |
| 5639 | case DW_TAG_formal_parameter: |
| 5640 | attr = dwarf2_attr (die, DW_AT_location, cu); |
| 5641 | if (attr) |
| 5642 | { |
| 5643 | var_decode_location (attr, sym, cu); |
| 5644 | /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */ |
| 5645 | if (SYMBOL_CLASS (sym) == LOC_COMPUTED) |
| 5646 | SYMBOL_CLASS (sym) = LOC_COMPUTED_ARG; |
| 5647 | } |
| 5648 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
| 5649 | if (attr) |
| 5650 | { |
| 5651 | dwarf2_const_value (attr, sym, cu); |
| 5652 | } |
| 5653 | add_symbol_to_list (sym, cu->list_in_scope); |
| 5654 | break; |
| 5655 | case DW_TAG_unspecified_parameters: |
| 5656 | /* From varargs functions; gdb doesn't seem to have any |
| 5657 | interest in this information, so just ignore it for now. |
| 5658 | (FIXME?) */ |
| 5659 | break; |
| 5660 | case DW_TAG_class_type: |
| 5661 | case DW_TAG_structure_type: |
| 5662 | case DW_TAG_union_type: |
| 5663 | case DW_TAG_enumeration_type: |
| 5664 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
| 5665 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
| 5666 | |
| 5667 | /* Make sure that the symbol includes appropriate enclosing |
| 5668 | classes/namespaces in its name. These are calculated in |
| 5669 | read_structure_scope, and the correct name is saved in |
| 5670 | the type. */ |
| 5671 | |
| 5672 | if (cu->language == language_cplus) |
| 5673 | { |
| 5674 | struct type *type = SYMBOL_TYPE (sym); |
| 5675 | |
| 5676 | if (TYPE_TAG_NAME (type) != NULL) |
| 5677 | { |
| 5678 | /* FIXME: carlton/2003-11-10: Should this use |
| 5679 | SYMBOL_SET_NAMES instead? (The same problem also |
| 5680 | arises a further down in the function.) */ |
| 5681 | SYMBOL_LINKAGE_NAME (sym) |
| 5682 | = obsavestring (TYPE_TAG_NAME (type), |
| 5683 | strlen (TYPE_TAG_NAME (type)), |
| 5684 | &objfile->objfile_obstack); |
| 5685 | } |
| 5686 | } |
| 5687 | |
| 5688 | { |
| 5689 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
| 5690 | really ever be static objects: otherwise, if you try |
| 5691 | to, say, break of a class's method and you're in a file |
| 5692 | which doesn't mention that class, it won't work unless |
| 5693 | the check for all static symbols in lookup_symbol_aux |
| 5694 | saves you. See the OtherFileClass tests in |
| 5695 | gdb.c++/namespace.exp. */ |
| 5696 | |
| 5697 | struct pending **list_to_add; |
| 5698 | |
| 5699 | list_to_add = (cu->list_in_scope == &file_symbols |
| 5700 | && cu->language == language_cplus |
| 5701 | ? &global_symbols : cu->list_in_scope); |
| 5702 | |
| 5703 | add_symbol_to_list (sym, list_to_add); |
| 5704 | |
| 5705 | /* The semantics of C++ state that "struct foo { ... }" also |
| 5706 | defines a typedef for "foo". Synthesize a typedef symbol so |
| 5707 | that "ptype foo" works as expected. */ |
| 5708 | if (cu->language == language_cplus) |
| 5709 | { |
| 5710 | struct symbol *typedef_sym = (struct symbol *) |
| 5711 | obstack_alloc (&objfile->objfile_obstack, |
| 5712 | sizeof (struct symbol)); |
| 5713 | *typedef_sym = *sym; |
| 5714 | SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN; |
| 5715 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) |
| 5716 | TYPE_NAME (SYMBOL_TYPE (sym)) = |
| 5717 | obsavestring (SYMBOL_NATURAL_NAME (sym), |
| 5718 | strlen (SYMBOL_NATURAL_NAME (sym)), |
| 5719 | &objfile->objfile_obstack); |
| 5720 | add_symbol_to_list (typedef_sym, list_to_add); |
| 5721 | } |
| 5722 | } |
| 5723 | break; |
| 5724 | case DW_TAG_typedef: |
| 5725 | if (processing_has_namespace_info |
| 5726 | && processing_current_prefix[0] != '\0') |
| 5727 | { |
| 5728 | SYMBOL_LINKAGE_NAME (sym) = obconcat (&objfile->objfile_obstack, |
| 5729 | processing_current_prefix, |
| 5730 | "::", |
| 5731 | name); |
| 5732 | } |
| 5733 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
| 5734 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 5735 | add_symbol_to_list (sym, cu->list_in_scope); |
| 5736 | break; |
| 5737 | case DW_TAG_base_type: |
| 5738 | case DW_TAG_subrange_type: |
| 5739 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
| 5740 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 5741 | add_symbol_to_list (sym, cu->list_in_scope); |
| 5742 | break; |
| 5743 | case DW_TAG_enumerator: |
| 5744 | if (processing_has_namespace_info |
| 5745 | && processing_current_prefix[0] != '\0') |
| 5746 | { |
| 5747 | SYMBOL_LINKAGE_NAME (sym) = obconcat (&objfile->objfile_obstack, |
| 5748 | processing_current_prefix, |
| 5749 | "::", |
| 5750 | name); |
| 5751 | } |
| 5752 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
| 5753 | if (attr) |
| 5754 | { |
| 5755 | dwarf2_const_value (attr, sym, cu); |
| 5756 | } |
| 5757 | { |
| 5758 | /* NOTE: carlton/2003-11-10: See comment above in the |
| 5759 | DW_TAG_class_type, etc. block. */ |
| 5760 | |
| 5761 | struct pending **list_to_add; |
| 5762 | |
| 5763 | list_to_add = (cu->list_in_scope == &file_symbols |
| 5764 | && cu->language == language_cplus |
| 5765 | ? &global_symbols : cu->list_in_scope); |
| 5766 | |
| 5767 | add_symbol_to_list (sym, list_to_add); |
| 5768 | } |
| 5769 | break; |
| 5770 | case DW_TAG_namespace: |
| 5771 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
| 5772 | add_symbol_to_list (sym, &global_symbols); |
| 5773 | break; |
| 5774 | default: |
| 5775 | /* Not a tag we recognize. Hopefully we aren't processing |
| 5776 | trash data, but since we must specifically ignore things |
| 5777 | we don't recognize, there is nothing else we should do at |
| 5778 | this point. */ |
| 5779 | complaint (&symfile_complaints, "unsupported tag: '%s'", |
| 5780 | dwarf_tag_name (die->tag)); |
| 5781 | break; |
| 5782 | } |
| 5783 | } |
| 5784 | return (sym); |
| 5785 | } |
| 5786 | |
| 5787 | /* Copy constant value from an attribute to a symbol. */ |
| 5788 | |
| 5789 | static void |
| 5790 | dwarf2_const_value (struct attribute *attr, struct symbol *sym, |
| 5791 | struct dwarf2_cu *cu) |
| 5792 | { |
| 5793 | struct objfile *objfile = cu->objfile; |
| 5794 | struct comp_unit_head *cu_header = &cu->header; |
| 5795 | struct dwarf_block *blk; |
| 5796 | |
| 5797 | switch (attr->form) |
| 5798 | { |
| 5799 | case DW_FORM_addr: |
| 5800 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size) |
| 5801 | dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym), |
| 5802 | cu_header->addr_size, |
| 5803 | TYPE_LENGTH (SYMBOL_TYPE |
| 5804 | (sym))); |
| 5805 | SYMBOL_VALUE_BYTES (sym) = (char *) |
| 5806 | obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size); |
| 5807 | /* NOTE: cagney/2003-05-09: In-lined store_address call with |
| 5808 | it's body - store_unsigned_integer. */ |
| 5809 | store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size, |
| 5810 | DW_ADDR (attr)); |
| 5811 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; |
| 5812 | break; |
| 5813 | case DW_FORM_block1: |
| 5814 | case DW_FORM_block2: |
| 5815 | case DW_FORM_block4: |
| 5816 | case DW_FORM_block: |
| 5817 | blk = DW_BLOCK (attr); |
| 5818 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size) |
| 5819 | dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym), |
| 5820 | blk->size, |
| 5821 | TYPE_LENGTH (SYMBOL_TYPE |
| 5822 | (sym))); |
| 5823 | SYMBOL_VALUE_BYTES (sym) = (char *) |
| 5824 | obstack_alloc (&objfile->objfile_obstack, blk->size); |
| 5825 | memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size); |
| 5826 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; |
| 5827 | break; |
| 5828 | |
| 5829 | /* The DW_AT_const_value attributes are supposed to carry the |
| 5830 | symbol's value "represented as it would be on the target |
| 5831 | architecture." By the time we get here, it's already been |
| 5832 | converted to host endianness, so we just need to sign- or |
| 5833 | zero-extend it as appropriate. */ |
| 5834 | case DW_FORM_data1: |
| 5835 | dwarf2_const_value_data (attr, sym, 8); |
| 5836 | break; |
| 5837 | case DW_FORM_data2: |
| 5838 | dwarf2_const_value_data (attr, sym, 16); |
| 5839 | break; |
| 5840 | case DW_FORM_data4: |
| 5841 | dwarf2_const_value_data (attr, sym, 32); |
| 5842 | break; |
| 5843 | case DW_FORM_data8: |
| 5844 | dwarf2_const_value_data (attr, sym, 64); |
| 5845 | break; |
| 5846 | |
| 5847 | case DW_FORM_sdata: |
| 5848 | SYMBOL_VALUE (sym) = DW_SND (attr); |
| 5849 | SYMBOL_CLASS (sym) = LOC_CONST; |
| 5850 | break; |
| 5851 | |
| 5852 | case DW_FORM_udata: |
| 5853 | SYMBOL_VALUE (sym) = DW_UNSND (attr); |
| 5854 | SYMBOL_CLASS (sym) = LOC_CONST; |
| 5855 | break; |
| 5856 | |
| 5857 | default: |
| 5858 | complaint (&symfile_complaints, |
| 5859 | "unsupported const value attribute form: '%s'", |
| 5860 | dwarf_form_name (attr->form)); |
| 5861 | SYMBOL_VALUE (sym) = 0; |
| 5862 | SYMBOL_CLASS (sym) = LOC_CONST; |
| 5863 | break; |
| 5864 | } |
| 5865 | } |
| 5866 | |
| 5867 | |
| 5868 | /* Given an attr with a DW_FORM_dataN value in host byte order, sign- |
| 5869 | or zero-extend it as appropriate for the symbol's type. */ |
| 5870 | static void |
| 5871 | dwarf2_const_value_data (struct attribute *attr, |
| 5872 | struct symbol *sym, |
| 5873 | int bits) |
| 5874 | { |
| 5875 | LONGEST l = DW_UNSND (attr); |
| 5876 | |
| 5877 | if (bits < sizeof (l) * 8) |
| 5878 | { |
| 5879 | if (TYPE_UNSIGNED (SYMBOL_TYPE (sym))) |
| 5880 | l &= ((LONGEST) 1 << bits) - 1; |
| 5881 | else |
| 5882 | l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits); |
| 5883 | } |
| 5884 | |
| 5885 | SYMBOL_VALUE (sym) = l; |
| 5886 | SYMBOL_CLASS (sym) = LOC_CONST; |
| 5887 | } |
| 5888 | |
| 5889 | |
| 5890 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
| 5891 | |
| 5892 | static struct type * |
| 5893 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
| 5894 | { |
| 5895 | struct type *type; |
| 5896 | struct attribute *type_attr; |
| 5897 | struct die_info *type_die; |
| 5898 | unsigned int ref; |
| 5899 | |
| 5900 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
| 5901 | if (!type_attr) |
| 5902 | { |
| 5903 | /* A missing DW_AT_type represents a void type. */ |
| 5904 | return dwarf2_fundamental_type (cu->objfile, FT_VOID, cu); |
| 5905 | } |
| 5906 | else |
| 5907 | { |
| 5908 | ref = dwarf2_get_ref_die_offset (type_attr, cu); |
| 5909 | type_die = follow_die_ref (ref); |
| 5910 | if (!type_die) |
| 5911 | { |
| 5912 | error ("Dwarf Error: Cannot find referent at offset %d [in module %s]", |
| 5913 | ref, cu->objfile->name); |
| 5914 | return NULL; |
| 5915 | } |
| 5916 | } |
| 5917 | type = tag_type_to_type (type_die, cu); |
| 5918 | if (!type) |
| 5919 | { |
| 5920 | dump_die (type_die); |
| 5921 | error ("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]", |
| 5922 | cu->objfile->name); |
| 5923 | } |
| 5924 | return type; |
| 5925 | } |
| 5926 | |
| 5927 | /* Return the containing type of the die in question using its |
| 5928 | DW_AT_containing_type attribute. */ |
| 5929 | |
| 5930 | static struct type * |
| 5931 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
| 5932 | { |
| 5933 | struct type *type = NULL; |
| 5934 | struct attribute *type_attr; |
| 5935 | struct die_info *type_die = NULL; |
| 5936 | unsigned int ref; |
| 5937 | |
| 5938 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
| 5939 | if (type_attr) |
| 5940 | { |
| 5941 | ref = dwarf2_get_ref_die_offset (type_attr, cu); |
| 5942 | type_die = follow_die_ref (ref); |
| 5943 | if (!type_die) |
| 5944 | { |
| 5945 | error ("Dwarf Error: Cannot find referent at offset %d [in module %s]", ref, |
| 5946 | cu->objfile->name); |
| 5947 | return NULL; |
| 5948 | } |
| 5949 | type = tag_type_to_type (type_die, cu); |
| 5950 | } |
| 5951 | if (!type) |
| 5952 | { |
| 5953 | if (type_die) |
| 5954 | dump_die (type_die); |
| 5955 | error ("Dwarf Error: Problem turning containing type into gdb type [in module %s]", |
| 5956 | cu->objfile->name); |
| 5957 | } |
| 5958 | return type; |
| 5959 | } |
| 5960 | |
| 5961 | #if 0 |
| 5962 | static struct type * |
| 5963 | type_at_offset (unsigned int offset, struct dwarf2_cu *cu) |
| 5964 | { |
| 5965 | struct die_info *die; |
| 5966 | struct type *type; |
| 5967 | |
| 5968 | die = follow_die_ref (offset); |
| 5969 | if (!die) |
| 5970 | { |
| 5971 | error ("Dwarf Error: Cannot find type referent at offset %d.", offset); |
| 5972 | return NULL; |
| 5973 | } |
| 5974 | type = tag_type_to_type (die, cu); |
| 5975 | return type; |
| 5976 | } |
| 5977 | #endif |
| 5978 | |
| 5979 | static struct type * |
| 5980 | tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu) |
| 5981 | { |
| 5982 | if (die->type) |
| 5983 | { |
| 5984 | return die->type; |
| 5985 | } |
| 5986 | else |
| 5987 | { |
| 5988 | read_type_die (die, cu); |
| 5989 | if (!die->type) |
| 5990 | { |
| 5991 | dump_die (die); |
| 5992 | error ("Dwarf Error: Cannot find type of die [in module %s]", |
| 5993 | cu->objfile->name); |
| 5994 | } |
| 5995 | return die->type; |
| 5996 | } |
| 5997 | } |
| 5998 | |
| 5999 | static void |
| 6000 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
| 6001 | { |
| 6002 | char *prefix = determine_prefix (die, cu); |
| 6003 | const char *old_prefix = processing_current_prefix; |
| 6004 | struct cleanup *back_to = make_cleanup (xfree, prefix); |
| 6005 | processing_current_prefix = prefix; |
| 6006 | |
| 6007 | switch (die->tag) |
| 6008 | { |
| 6009 | case DW_TAG_class_type: |
| 6010 | case DW_TAG_structure_type: |
| 6011 | case DW_TAG_union_type: |
| 6012 | read_structure_scope (die, cu); |
| 6013 | break; |
| 6014 | case DW_TAG_enumeration_type: |
| 6015 | read_enumeration (die, cu); |
| 6016 | break; |
| 6017 | case DW_TAG_subprogram: |
| 6018 | case DW_TAG_subroutine_type: |
| 6019 | read_subroutine_type (die, cu); |
| 6020 | break; |
| 6021 | case DW_TAG_array_type: |
| 6022 | read_array_type (die, cu); |
| 6023 | break; |
| 6024 | case DW_TAG_pointer_type: |
| 6025 | read_tag_pointer_type (die, cu); |
| 6026 | break; |
| 6027 | case DW_TAG_ptr_to_member_type: |
| 6028 | read_tag_ptr_to_member_type (die, cu); |
| 6029 | break; |
| 6030 | case DW_TAG_reference_type: |
| 6031 | read_tag_reference_type (die, cu); |
| 6032 | break; |
| 6033 | case DW_TAG_const_type: |
| 6034 | read_tag_const_type (die, cu); |
| 6035 | break; |
| 6036 | case DW_TAG_volatile_type: |
| 6037 | read_tag_volatile_type (die, cu); |
| 6038 | break; |
| 6039 | case DW_TAG_string_type: |
| 6040 | read_tag_string_type (die, cu); |
| 6041 | break; |
| 6042 | case DW_TAG_typedef: |
| 6043 | read_typedef (die, cu); |
| 6044 | break; |
| 6045 | case DW_TAG_subrange_type: |
| 6046 | read_subrange_type (die, cu); |
| 6047 | break; |
| 6048 | case DW_TAG_base_type: |
| 6049 | read_base_type (die, cu); |
| 6050 | break; |
| 6051 | default: |
| 6052 | complaint (&symfile_complaints, "unexepected tag in read_type_die: '%s'", |
| 6053 | dwarf_tag_name (die->tag)); |
| 6054 | break; |
| 6055 | } |
| 6056 | |
| 6057 | processing_current_prefix = old_prefix; |
| 6058 | do_cleanups (back_to); |
| 6059 | } |
| 6060 | |
| 6061 | /* Return the name of the namespace/class that DIE is defined within, |
| 6062 | or "" if we can't tell. The caller should xfree the result. */ |
| 6063 | |
| 6064 | /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment |
| 6065 | therein) for an example of how to use this function to deal with |
| 6066 | DW_AT_specification. */ |
| 6067 | |
| 6068 | static char * |
| 6069 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
| 6070 | { |
| 6071 | char *prefix = determine_prefix_aux (die, cu); |
| 6072 | |
| 6073 | return prefix ? prefix : xstrdup (""); |
| 6074 | } |
| 6075 | |
| 6076 | /* Return the name of the namespace/class that DIE is defined |
| 6077 | within, or NULL if we can't tell. The caller should xfree the |
| 6078 | result. */ |
| 6079 | |
| 6080 | static char * |
| 6081 | determine_prefix_aux (struct die_info *die, struct dwarf2_cu *cu) |
| 6082 | { |
| 6083 | struct die_info *parent; |
| 6084 | |
| 6085 | if (cu->language != language_cplus) |
| 6086 | return NULL; |
| 6087 | |
| 6088 | parent = die->parent; |
| 6089 | |
| 6090 | if (parent == NULL) |
| 6091 | { |
| 6092 | return (processing_has_namespace_info ? xstrdup ("") : NULL); |
| 6093 | } |
| 6094 | else |
| 6095 | { |
| 6096 | char *parent_prefix = determine_prefix_aux (parent, cu); |
| 6097 | char *retval; |
| 6098 | |
| 6099 | switch (parent->tag) { |
| 6100 | case DW_TAG_namespace: |
| 6101 | { |
| 6102 | int dummy; |
| 6103 | |
| 6104 | retval = typename_concat (parent_prefix, |
| 6105 | namespace_name (parent, &dummy, cu)); |
| 6106 | } |
| 6107 | break; |
| 6108 | case DW_TAG_class_type: |
| 6109 | case DW_TAG_structure_type: |
| 6110 | { |
| 6111 | if (parent_prefix != NULL) |
| 6112 | { |
| 6113 | const char *parent_name = dwarf2_name (parent, cu); |
| 6114 | |
| 6115 | if (parent_name != NULL) |
| 6116 | retval = typename_concat (parent_prefix, dwarf2_name (parent, cu)); |
| 6117 | else |
| 6118 | /* FIXME: carlton/2003-11-10: I'm not sure what the |
| 6119 | best thing to do here is. */ |
| 6120 | retval = typename_concat (parent_prefix, |
| 6121 | "<<anonymous class>>"); |
| 6122 | } |
| 6123 | else |
| 6124 | retval = class_name (parent, cu); |
| 6125 | } |
| 6126 | break; |
| 6127 | default: |
| 6128 | retval = parent_prefix; |
| 6129 | break; |
| 6130 | } |
| 6131 | |
| 6132 | if (retval != parent_prefix) |
| 6133 | xfree (parent_prefix); |
| 6134 | return retval; |
| 6135 | } |
| 6136 | } |
| 6137 | |
| 6138 | /* Return a newly-allocated string formed by concatenating PREFIX, |
| 6139 | "::", and SUFFIX, except that if PREFIX is NULL or the empty |
| 6140 | string, just return a copy of SUFFIX. */ |
| 6141 | |
| 6142 | static char * |
| 6143 | typename_concat (const char *prefix, const char *suffix) |
| 6144 | { |
| 6145 | if (prefix == NULL || prefix[0] == '\0') |
| 6146 | return xstrdup (suffix); |
| 6147 | else |
| 6148 | { |
| 6149 | char *retval = xmalloc (strlen (prefix) + 2 + strlen (suffix) + 1); |
| 6150 | |
| 6151 | strcpy (retval, prefix); |
| 6152 | strcat (retval, "::"); |
| 6153 | strcat (retval, suffix); |
| 6154 | |
| 6155 | return retval; |
| 6156 | } |
| 6157 | } |
| 6158 | |
| 6159 | /* Return a newly-allocated string giving the name of the class given |
| 6160 | by DIE. */ |
| 6161 | |
| 6162 | static char * |
| 6163 | class_name (struct die_info *die, struct dwarf2_cu *cu) |
| 6164 | { |
| 6165 | struct die_info *child; |
| 6166 | const char *name; |
| 6167 | |
| 6168 | for (child = die->child; child != NULL; child = sibling_die (child)) |
| 6169 | { |
| 6170 | if (child->tag == DW_TAG_subprogram) |
| 6171 | return class_name_from_physname (dwarf2_linkage_name (child, cu)); |
| 6172 | } |
| 6173 | |
| 6174 | name = dwarf2_name (die, cu); |
| 6175 | if (name != NULL) |
| 6176 | return xstrdup (name); |
| 6177 | else |
| 6178 | return xstrdup (""); |
| 6179 | } |
| 6180 | |
| 6181 | static struct type * |
| 6182 | dwarf_base_type (int encoding, int size, struct dwarf2_cu *cu) |
| 6183 | { |
| 6184 | struct objfile *objfile = cu->objfile; |
| 6185 | |
| 6186 | /* FIXME - this should not produce a new (struct type *) |
| 6187 | every time. It should cache base types. */ |
| 6188 | struct type *type; |
| 6189 | switch (encoding) |
| 6190 | { |
| 6191 | case DW_ATE_address: |
| 6192 | type = dwarf2_fundamental_type (objfile, FT_VOID, cu); |
| 6193 | return type; |
| 6194 | case DW_ATE_boolean: |
| 6195 | type = dwarf2_fundamental_type (objfile, FT_BOOLEAN, cu); |
| 6196 | return type; |
| 6197 | case DW_ATE_complex_float: |
| 6198 | if (size == 16) |
| 6199 | { |
| 6200 | type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX, cu); |
| 6201 | } |
| 6202 | else |
| 6203 | { |
| 6204 | type = dwarf2_fundamental_type (objfile, FT_COMPLEX, cu); |
| 6205 | } |
| 6206 | return type; |
| 6207 | case DW_ATE_float: |
| 6208 | if (size == 8) |
| 6209 | { |
| 6210 | type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT, cu); |
| 6211 | } |
| 6212 | else |
| 6213 | { |
| 6214 | type = dwarf2_fundamental_type (objfile, FT_FLOAT, cu); |
| 6215 | } |
| 6216 | return type; |
| 6217 | case DW_ATE_signed: |
| 6218 | switch (size) |
| 6219 | { |
| 6220 | case 1: |
| 6221 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR, cu); |
| 6222 | break; |
| 6223 | case 2: |
| 6224 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT, cu); |
| 6225 | break; |
| 6226 | default: |
| 6227 | case 4: |
| 6228 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER, cu); |
| 6229 | break; |
| 6230 | } |
| 6231 | return type; |
| 6232 | case DW_ATE_signed_char: |
| 6233 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR, cu); |
| 6234 | return type; |
| 6235 | case DW_ATE_unsigned: |
| 6236 | switch (size) |
| 6237 | { |
| 6238 | case 1: |
| 6239 | type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR, cu); |
| 6240 | break; |
| 6241 | case 2: |
| 6242 | type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT, cu); |
| 6243 | break; |
| 6244 | default: |
| 6245 | case 4: |
| 6246 | type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER, cu); |
| 6247 | break; |
| 6248 | } |
| 6249 | return type; |
| 6250 | case DW_ATE_unsigned_char: |
| 6251 | type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR, cu); |
| 6252 | return type; |
| 6253 | default: |
| 6254 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER, cu); |
| 6255 | return type; |
| 6256 | } |
| 6257 | } |
| 6258 | |
| 6259 | #if 0 |
| 6260 | struct die_info * |
| 6261 | copy_die (struct die_info *old_die) |
| 6262 | { |
| 6263 | struct die_info *new_die; |
| 6264 | int i, num_attrs; |
| 6265 | |
| 6266 | new_die = (struct die_info *) xmalloc (sizeof (struct die_info)); |
| 6267 | memset (new_die, 0, sizeof (struct die_info)); |
| 6268 | |
| 6269 | new_die->tag = old_die->tag; |
| 6270 | new_die->has_children = old_die->has_children; |
| 6271 | new_die->abbrev = old_die->abbrev; |
| 6272 | new_die->offset = old_die->offset; |
| 6273 | new_die->type = NULL; |
| 6274 | |
| 6275 | num_attrs = old_die->num_attrs; |
| 6276 | new_die->num_attrs = num_attrs; |
| 6277 | new_die->attrs = (struct attribute *) |
| 6278 | xmalloc (num_attrs * sizeof (struct attribute)); |
| 6279 | |
| 6280 | for (i = 0; i < old_die->num_attrs; ++i) |
| 6281 | { |
| 6282 | new_die->attrs[i].name = old_die->attrs[i].name; |
| 6283 | new_die->attrs[i].form = old_die->attrs[i].form; |
| 6284 | new_die->attrs[i].u.addr = old_die->attrs[i].u.addr; |
| 6285 | } |
| 6286 | |
| 6287 | new_die->next = NULL; |
| 6288 | return new_die; |
| 6289 | } |
| 6290 | #endif |
| 6291 | |
| 6292 | /* Return sibling of die, NULL if no sibling. */ |
| 6293 | |
| 6294 | static struct die_info * |
| 6295 | sibling_die (struct die_info *die) |
| 6296 | { |
| 6297 | return die->sibling; |
| 6298 | } |
| 6299 | |
| 6300 | /* Get linkage name of a die, return NULL if not found. */ |
| 6301 | |
| 6302 | static char * |
| 6303 | dwarf2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) |
| 6304 | { |
| 6305 | struct attribute *attr; |
| 6306 | |
| 6307 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); |
| 6308 | if (attr && DW_STRING (attr)) |
| 6309 | return DW_STRING (attr); |
| 6310 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 6311 | if (attr && DW_STRING (attr)) |
| 6312 | return DW_STRING (attr); |
| 6313 | return NULL; |
| 6314 | } |
| 6315 | |
| 6316 | /* Get name of a die, return NULL if not found. */ |
| 6317 | |
| 6318 | static char * |
| 6319 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
| 6320 | { |
| 6321 | struct attribute *attr; |
| 6322 | |
| 6323 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 6324 | if (attr && DW_STRING (attr)) |
| 6325 | return DW_STRING (attr); |
| 6326 | return NULL; |
| 6327 | } |
| 6328 | |
| 6329 | /* Return the die that this die in an extension of, or NULL if there |
| 6330 | is none. */ |
| 6331 | |
| 6332 | static struct die_info * |
| 6333 | dwarf2_extension (struct die_info *die, struct dwarf2_cu *cu) |
| 6334 | { |
| 6335 | struct attribute *attr; |
| 6336 | struct die_info *extension_die; |
| 6337 | unsigned int ref; |
| 6338 | |
| 6339 | attr = dwarf2_attr (die, DW_AT_extension, cu); |
| 6340 | if (attr == NULL) |
| 6341 | return NULL; |
| 6342 | |
| 6343 | ref = dwarf2_get_ref_die_offset (attr, cu); |
| 6344 | extension_die = follow_die_ref (ref); |
| 6345 | if (!extension_die) |
| 6346 | { |
| 6347 | error ("Dwarf Error: Cannot find referent at offset %d.", ref); |
| 6348 | } |
| 6349 | |
| 6350 | return extension_die; |
| 6351 | } |
| 6352 | |
| 6353 | /* Convert a DIE tag into its string name. */ |
| 6354 | |
| 6355 | static char * |
| 6356 | dwarf_tag_name (unsigned tag) |
| 6357 | { |
| 6358 | switch (tag) |
| 6359 | { |
| 6360 | case DW_TAG_padding: |
| 6361 | return "DW_TAG_padding"; |
| 6362 | case DW_TAG_array_type: |
| 6363 | return "DW_TAG_array_type"; |
| 6364 | case DW_TAG_class_type: |
| 6365 | return "DW_TAG_class_type"; |
| 6366 | case DW_TAG_entry_point: |
| 6367 | return "DW_TAG_entry_point"; |
| 6368 | case DW_TAG_enumeration_type: |
| 6369 | return "DW_TAG_enumeration_type"; |
| 6370 | case DW_TAG_formal_parameter: |
| 6371 | return "DW_TAG_formal_parameter"; |
| 6372 | case DW_TAG_imported_declaration: |
| 6373 | return "DW_TAG_imported_declaration"; |
| 6374 | case DW_TAG_label: |
| 6375 | return "DW_TAG_label"; |
| 6376 | case DW_TAG_lexical_block: |
| 6377 | return "DW_TAG_lexical_block"; |
| 6378 | case DW_TAG_member: |
| 6379 | return "DW_TAG_member"; |
| 6380 | case DW_TAG_pointer_type: |
| 6381 | return "DW_TAG_pointer_type"; |
| 6382 | case DW_TAG_reference_type: |
| 6383 | return "DW_TAG_reference_type"; |
| 6384 | case DW_TAG_compile_unit: |
| 6385 | return "DW_TAG_compile_unit"; |
| 6386 | case DW_TAG_string_type: |
| 6387 | return "DW_TAG_string_type"; |
| 6388 | case DW_TAG_structure_type: |
| 6389 | return "DW_TAG_structure_type"; |
| 6390 | case DW_TAG_subroutine_type: |
| 6391 | return "DW_TAG_subroutine_type"; |
| 6392 | case DW_TAG_typedef: |
| 6393 | return "DW_TAG_typedef"; |
| 6394 | case DW_TAG_union_type: |
| 6395 | return "DW_TAG_union_type"; |
| 6396 | case DW_TAG_unspecified_parameters: |
| 6397 | return "DW_TAG_unspecified_parameters"; |
| 6398 | case DW_TAG_variant: |
| 6399 | return "DW_TAG_variant"; |
| 6400 | case DW_TAG_common_block: |
| 6401 | return "DW_TAG_common_block"; |
| 6402 | case DW_TAG_common_inclusion: |
| 6403 | return "DW_TAG_common_inclusion"; |
| 6404 | case DW_TAG_inheritance: |
| 6405 | return "DW_TAG_inheritance"; |
| 6406 | case DW_TAG_inlined_subroutine: |
| 6407 | return "DW_TAG_inlined_subroutine"; |
| 6408 | case DW_TAG_module: |
| 6409 | return "DW_TAG_module"; |
| 6410 | case DW_TAG_ptr_to_member_type: |
| 6411 | return "DW_TAG_ptr_to_member_type"; |
| 6412 | case DW_TAG_set_type: |
| 6413 | return "DW_TAG_set_type"; |
| 6414 | case DW_TAG_subrange_type: |
| 6415 | return "DW_TAG_subrange_type"; |
| 6416 | case DW_TAG_with_stmt: |
| 6417 | return "DW_TAG_with_stmt"; |
| 6418 | case DW_TAG_access_declaration: |
| 6419 | return "DW_TAG_access_declaration"; |
| 6420 | case DW_TAG_base_type: |
| 6421 | return "DW_TAG_base_type"; |
| 6422 | case DW_TAG_catch_block: |
| 6423 | return "DW_TAG_catch_block"; |
| 6424 | case DW_TAG_const_type: |
| 6425 | return "DW_TAG_const_type"; |
| 6426 | case DW_TAG_constant: |
| 6427 | return "DW_TAG_constant"; |
| 6428 | case DW_TAG_enumerator: |
| 6429 | return "DW_TAG_enumerator"; |
| 6430 | case DW_TAG_file_type: |
| 6431 | return "DW_TAG_file_type"; |
| 6432 | case DW_TAG_friend: |
| 6433 | return "DW_TAG_friend"; |
| 6434 | case DW_TAG_namelist: |
| 6435 | return "DW_TAG_namelist"; |
| 6436 | case DW_TAG_namelist_item: |
| 6437 | return "DW_TAG_namelist_item"; |
| 6438 | case DW_TAG_packed_type: |
| 6439 | return "DW_TAG_packed_type"; |
| 6440 | case DW_TAG_subprogram: |
| 6441 | return "DW_TAG_subprogram"; |
| 6442 | case DW_TAG_template_type_param: |
| 6443 | return "DW_TAG_template_type_param"; |
| 6444 | case DW_TAG_template_value_param: |
| 6445 | return "DW_TAG_template_value_param"; |
| 6446 | case DW_TAG_thrown_type: |
| 6447 | return "DW_TAG_thrown_type"; |
| 6448 | case DW_TAG_try_block: |
| 6449 | return "DW_TAG_try_block"; |
| 6450 | case DW_TAG_variant_part: |
| 6451 | return "DW_TAG_variant_part"; |
| 6452 | case DW_TAG_variable: |
| 6453 | return "DW_TAG_variable"; |
| 6454 | case DW_TAG_volatile_type: |
| 6455 | return "DW_TAG_volatile_type"; |
| 6456 | case DW_TAG_dwarf_procedure: |
| 6457 | return "DW_TAG_dwarf_procedure"; |
| 6458 | case DW_TAG_restrict_type: |
| 6459 | return "DW_TAG_restrict_type"; |
| 6460 | case DW_TAG_interface_type: |
| 6461 | return "DW_TAG_interface_type"; |
| 6462 | case DW_TAG_namespace: |
| 6463 | return "DW_TAG_namespace"; |
| 6464 | case DW_TAG_imported_module: |
| 6465 | return "DW_TAG_imported_module"; |
| 6466 | case DW_TAG_unspecified_type: |
| 6467 | return "DW_TAG_unspecified_type"; |
| 6468 | case DW_TAG_partial_unit: |
| 6469 | return "DW_TAG_partial_unit"; |
| 6470 | case DW_TAG_imported_unit: |
| 6471 | return "DW_TAG_imported_unit"; |
| 6472 | case DW_TAG_MIPS_loop: |
| 6473 | return "DW_TAG_MIPS_loop"; |
| 6474 | case DW_TAG_format_label: |
| 6475 | return "DW_TAG_format_label"; |
| 6476 | case DW_TAG_function_template: |
| 6477 | return "DW_TAG_function_template"; |
| 6478 | case DW_TAG_class_template: |
| 6479 | return "DW_TAG_class_template"; |
| 6480 | default: |
| 6481 | return "DW_TAG_<unknown>"; |
| 6482 | } |
| 6483 | } |
| 6484 | |
| 6485 | /* Convert a DWARF attribute code into its string name. */ |
| 6486 | |
| 6487 | static char * |
| 6488 | dwarf_attr_name (unsigned attr) |
| 6489 | { |
| 6490 | switch (attr) |
| 6491 | { |
| 6492 | case DW_AT_sibling: |
| 6493 | return "DW_AT_sibling"; |
| 6494 | case DW_AT_location: |
| 6495 | return "DW_AT_location"; |
| 6496 | case DW_AT_name: |
| 6497 | return "DW_AT_name"; |
| 6498 | case DW_AT_ordering: |
| 6499 | return "DW_AT_ordering"; |
| 6500 | case DW_AT_subscr_data: |
| 6501 | return "DW_AT_subscr_data"; |
| 6502 | case DW_AT_byte_size: |
| 6503 | return "DW_AT_byte_size"; |
| 6504 | case DW_AT_bit_offset: |
| 6505 | return "DW_AT_bit_offset"; |
| 6506 | case DW_AT_bit_size: |
| 6507 | return "DW_AT_bit_size"; |
| 6508 | case DW_AT_element_list: |
| 6509 | return "DW_AT_element_list"; |
| 6510 | case DW_AT_stmt_list: |
| 6511 | return "DW_AT_stmt_list"; |
| 6512 | case DW_AT_low_pc: |
| 6513 | return "DW_AT_low_pc"; |
| 6514 | case DW_AT_high_pc: |
| 6515 | return "DW_AT_high_pc"; |
| 6516 | case DW_AT_language: |
| 6517 | return "DW_AT_language"; |
| 6518 | case DW_AT_member: |
| 6519 | return "DW_AT_member"; |
| 6520 | case DW_AT_discr: |
| 6521 | return "DW_AT_discr"; |
| 6522 | case DW_AT_discr_value: |
| 6523 | return "DW_AT_discr_value"; |
| 6524 | case DW_AT_visibility: |
| 6525 | return "DW_AT_visibility"; |
| 6526 | case DW_AT_import: |
| 6527 | return "DW_AT_import"; |
| 6528 | case DW_AT_string_length: |
| 6529 | return "DW_AT_string_length"; |
| 6530 | case DW_AT_common_reference: |
| 6531 | return "DW_AT_common_reference"; |
| 6532 | case DW_AT_comp_dir: |
| 6533 | return "DW_AT_comp_dir"; |
| 6534 | case DW_AT_const_value: |
| 6535 | return "DW_AT_const_value"; |
| 6536 | case DW_AT_containing_type: |
| 6537 | return "DW_AT_containing_type"; |
| 6538 | case DW_AT_default_value: |
| 6539 | return "DW_AT_default_value"; |
| 6540 | case DW_AT_inline: |
| 6541 | return "DW_AT_inline"; |
| 6542 | case DW_AT_is_optional: |
| 6543 | return "DW_AT_is_optional"; |
| 6544 | case DW_AT_lower_bound: |
| 6545 | return "DW_AT_lower_bound"; |
| 6546 | case DW_AT_producer: |
| 6547 | return "DW_AT_producer"; |
| 6548 | case DW_AT_prototyped: |
| 6549 | return "DW_AT_prototyped"; |
| 6550 | case DW_AT_return_addr: |
| 6551 | return "DW_AT_return_addr"; |
| 6552 | case DW_AT_start_scope: |
| 6553 | return "DW_AT_start_scope"; |
| 6554 | case DW_AT_stride_size: |
| 6555 | return "DW_AT_stride_size"; |
| 6556 | case DW_AT_upper_bound: |
| 6557 | return "DW_AT_upper_bound"; |
| 6558 | case DW_AT_abstract_origin: |
| 6559 | return "DW_AT_abstract_origin"; |
| 6560 | case DW_AT_accessibility: |
| 6561 | return "DW_AT_accessibility"; |
| 6562 | case DW_AT_address_class: |
| 6563 | return "DW_AT_address_class"; |
| 6564 | case DW_AT_artificial: |
| 6565 | return "DW_AT_artificial"; |
| 6566 | case DW_AT_base_types: |
| 6567 | return "DW_AT_base_types"; |
| 6568 | case DW_AT_calling_convention: |
| 6569 | return "DW_AT_calling_convention"; |
| 6570 | case DW_AT_count: |
| 6571 | return "DW_AT_count"; |
| 6572 | case DW_AT_data_member_location: |
| 6573 | return "DW_AT_data_member_location"; |
| 6574 | case DW_AT_decl_column: |
| 6575 | return "DW_AT_decl_column"; |
| 6576 | case DW_AT_decl_file: |
| 6577 | return "DW_AT_decl_file"; |
| 6578 | case DW_AT_decl_line: |
| 6579 | return "DW_AT_decl_line"; |
| 6580 | case DW_AT_declaration: |
| 6581 | return "DW_AT_declaration"; |
| 6582 | case DW_AT_discr_list: |
| 6583 | return "DW_AT_discr_list"; |
| 6584 | case DW_AT_encoding: |
| 6585 | return "DW_AT_encoding"; |
| 6586 | case DW_AT_external: |
| 6587 | return "DW_AT_external"; |
| 6588 | case DW_AT_frame_base: |
| 6589 | return "DW_AT_frame_base"; |
| 6590 | case DW_AT_friend: |
| 6591 | return "DW_AT_friend"; |
| 6592 | case DW_AT_identifier_case: |
| 6593 | return "DW_AT_identifier_case"; |
| 6594 | case DW_AT_macro_info: |
| 6595 | return "DW_AT_macro_info"; |
| 6596 | case DW_AT_namelist_items: |
| 6597 | return "DW_AT_namelist_items"; |
| 6598 | case DW_AT_priority: |
| 6599 | return "DW_AT_priority"; |
| 6600 | case DW_AT_segment: |
| 6601 | return "DW_AT_segment"; |
| 6602 | case DW_AT_specification: |
| 6603 | return "DW_AT_specification"; |
| 6604 | case DW_AT_static_link: |
| 6605 | return "DW_AT_static_link"; |
| 6606 | case DW_AT_type: |
| 6607 | return "DW_AT_type"; |
| 6608 | case DW_AT_use_location: |
| 6609 | return "DW_AT_use_location"; |
| 6610 | case DW_AT_variable_parameter: |
| 6611 | return "DW_AT_variable_parameter"; |
| 6612 | case DW_AT_virtuality: |
| 6613 | return "DW_AT_virtuality"; |
| 6614 | case DW_AT_vtable_elem_location: |
| 6615 | return "DW_AT_vtable_elem_location"; |
| 6616 | case DW_AT_allocated: |
| 6617 | return "DW_AT_allocated"; |
| 6618 | case DW_AT_associated: |
| 6619 | return "DW_AT_associated"; |
| 6620 | case DW_AT_data_location: |
| 6621 | return "DW_AT_data_location"; |
| 6622 | case DW_AT_stride: |
| 6623 | return "DW_AT_stride"; |
| 6624 | case DW_AT_entry_pc: |
| 6625 | return "DW_AT_entry_pc"; |
| 6626 | case DW_AT_use_UTF8: |
| 6627 | return "DW_AT_use_UTF8"; |
| 6628 | case DW_AT_extension: |
| 6629 | return "DW_AT_extension"; |
| 6630 | case DW_AT_ranges: |
| 6631 | return "DW_AT_ranges"; |
| 6632 | case DW_AT_trampoline: |
| 6633 | return "DW_AT_trampoline"; |
| 6634 | case DW_AT_call_column: |
| 6635 | return "DW_AT_call_column"; |
| 6636 | case DW_AT_call_file: |
| 6637 | return "DW_AT_call_file"; |
| 6638 | case DW_AT_call_line: |
| 6639 | return "DW_AT_call_line"; |
| 6640 | #ifdef MIPS |
| 6641 | case DW_AT_MIPS_fde: |
| 6642 | return "DW_AT_MIPS_fde"; |
| 6643 | case DW_AT_MIPS_loop_begin: |
| 6644 | return "DW_AT_MIPS_loop_begin"; |
| 6645 | case DW_AT_MIPS_tail_loop_begin: |
| 6646 | return "DW_AT_MIPS_tail_loop_begin"; |
| 6647 | case DW_AT_MIPS_epilog_begin: |
| 6648 | return "DW_AT_MIPS_epilog_begin"; |
| 6649 | case DW_AT_MIPS_loop_unroll_factor: |
| 6650 | return "DW_AT_MIPS_loop_unroll_factor"; |
| 6651 | case DW_AT_MIPS_software_pipeline_depth: |
| 6652 | return "DW_AT_MIPS_software_pipeline_depth"; |
| 6653 | #endif |
| 6654 | case DW_AT_MIPS_linkage_name: |
| 6655 | return "DW_AT_MIPS_linkage_name"; |
| 6656 | |
| 6657 | case DW_AT_sf_names: |
| 6658 | return "DW_AT_sf_names"; |
| 6659 | case DW_AT_src_info: |
| 6660 | return "DW_AT_src_info"; |
| 6661 | case DW_AT_mac_info: |
| 6662 | return "DW_AT_mac_info"; |
| 6663 | case DW_AT_src_coords: |
| 6664 | return "DW_AT_src_coords"; |
| 6665 | case DW_AT_body_begin: |
| 6666 | return "DW_AT_body_begin"; |
| 6667 | case DW_AT_body_end: |
| 6668 | return "DW_AT_body_end"; |
| 6669 | case DW_AT_GNU_vector: |
| 6670 | return "DW_AT_GNU_vector"; |
| 6671 | default: |
| 6672 | return "DW_AT_<unknown>"; |
| 6673 | } |
| 6674 | } |
| 6675 | |
| 6676 | /* Convert a DWARF value form code into its string name. */ |
| 6677 | |
| 6678 | static char * |
| 6679 | dwarf_form_name (unsigned form) |
| 6680 | { |
| 6681 | switch (form) |
| 6682 | { |
| 6683 | case DW_FORM_addr: |
| 6684 | return "DW_FORM_addr"; |
| 6685 | case DW_FORM_block2: |
| 6686 | return "DW_FORM_block2"; |
| 6687 | case DW_FORM_block4: |
| 6688 | return "DW_FORM_block4"; |
| 6689 | case DW_FORM_data2: |
| 6690 | return "DW_FORM_data2"; |
| 6691 | case DW_FORM_data4: |
| 6692 | return "DW_FORM_data4"; |
| 6693 | case DW_FORM_data8: |
| 6694 | return "DW_FORM_data8"; |
| 6695 | case DW_FORM_string: |
| 6696 | return "DW_FORM_string"; |
| 6697 | case DW_FORM_block: |
| 6698 | return "DW_FORM_block"; |
| 6699 | case DW_FORM_block1: |
| 6700 | return "DW_FORM_block1"; |
| 6701 | case DW_FORM_data1: |
| 6702 | return "DW_FORM_data1"; |
| 6703 | case DW_FORM_flag: |
| 6704 | return "DW_FORM_flag"; |
| 6705 | case DW_FORM_sdata: |
| 6706 | return "DW_FORM_sdata"; |
| 6707 | case DW_FORM_strp: |
| 6708 | return "DW_FORM_strp"; |
| 6709 | case DW_FORM_udata: |
| 6710 | return "DW_FORM_udata"; |
| 6711 | case DW_FORM_ref_addr: |
| 6712 | return "DW_FORM_ref_addr"; |
| 6713 | case DW_FORM_ref1: |
| 6714 | return "DW_FORM_ref1"; |
| 6715 | case DW_FORM_ref2: |
| 6716 | return "DW_FORM_ref2"; |
| 6717 | case DW_FORM_ref4: |
| 6718 | return "DW_FORM_ref4"; |
| 6719 | case DW_FORM_ref8: |
| 6720 | return "DW_FORM_ref8"; |
| 6721 | case DW_FORM_ref_udata: |
| 6722 | return "DW_FORM_ref_udata"; |
| 6723 | case DW_FORM_indirect: |
| 6724 | return "DW_FORM_indirect"; |
| 6725 | default: |
| 6726 | return "DW_FORM_<unknown>"; |
| 6727 | } |
| 6728 | } |
| 6729 | |
| 6730 | /* Convert a DWARF stack opcode into its string name. */ |
| 6731 | |
| 6732 | static char * |
| 6733 | dwarf_stack_op_name (unsigned op) |
| 6734 | { |
| 6735 | switch (op) |
| 6736 | { |
| 6737 | case DW_OP_addr: |
| 6738 | return "DW_OP_addr"; |
| 6739 | case DW_OP_deref: |
| 6740 | return "DW_OP_deref"; |
| 6741 | case DW_OP_const1u: |
| 6742 | return "DW_OP_const1u"; |
| 6743 | case DW_OP_const1s: |
| 6744 | return "DW_OP_const1s"; |
| 6745 | case DW_OP_const2u: |
| 6746 | return "DW_OP_const2u"; |
| 6747 | case DW_OP_const2s: |
| 6748 | return "DW_OP_const2s"; |
| 6749 | case DW_OP_const4u: |
| 6750 | return "DW_OP_const4u"; |
| 6751 | case DW_OP_const4s: |
| 6752 | return "DW_OP_const4s"; |
| 6753 | case DW_OP_const8u: |
| 6754 | return "DW_OP_const8u"; |
| 6755 | case DW_OP_const8s: |
| 6756 | return "DW_OP_const8s"; |
| 6757 | case DW_OP_constu: |
| 6758 | return "DW_OP_constu"; |
| 6759 | case DW_OP_consts: |
| 6760 | return "DW_OP_consts"; |
| 6761 | case DW_OP_dup: |
| 6762 | return "DW_OP_dup"; |
| 6763 | case DW_OP_drop: |
| 6764 | return "DW_OP_drop"; |
| 6765 | case DW_OP_over: |
| 6766 | return "DW_OP_over"; |
| 6767 | case DW_OP_pick: |
| 6768 | return "DW_OP_pick"; |
| 6769 | case DW_OP_swap: |
| 6770 | return "DW_OP_swap"; |
| 6771 | case DW_OP_rot: |
| 6772 | return "DW_OP_rot"; |
| 6773 | case DW_OP_xderef: |
| 6774 | return "DW_OP_xderef"; |
| 6775 | case DW_OP_abs: |
| 6776 | return "DW_OP_abs"; |
| 6777 | case DW_OP_and: |
| 6778 | return "DW_OP_and"; |
| 6779 | case DW_OP_div: |
| 6780 | return "DW_OP_div"; |
| 6781 | case DW_OP_minus: |
| 6782 | return "DW_OP_minus"; |
| 6783 | case DW_OP_mod: |
| 6784 | return "DW_OP_mod"; |
| 6785 | case DW_OP_mul: |
| 6786 | return "DW_OP_mul"; |
| 6787 | case DW_OP_neg: |
| 6788 | return "DW_OP_neg"; |
| 6789 | case DW_OP_not: |
| 6790 | return "DW_OP_not"; |
| 6791 | case DW_OP_or: |
| 6792 | return "DW_OP_or"; |
| 6793 | case DW_OP_plus: |
| 6794 | return "DW_OP_plus"; |
| 6795 | case DW_OP_plus_uconst: |
| 6796 | return "DW_OP_plus_uconst"; |
| 6797 | case DW_OP_shl: |
| 6798 | return "DW_OP_shl"; |
| 6799 | case DW_OP_shr: |
| 6800 | return "DW_OP_shr"; |
| 6801 | case DW_OP_shra: |
| 6802 | return "DW_OP_shra"; |
| 6803 | case DW_OP_xor: |
| 6804 | return "DW_OP_xor"; |
| 6805 | case DW_OP_bra: |
| 6806 | return "DW_OP_bra"; |
| 6807 | case DW_OP_eq: |
| 6808 | return "DW_OP_eq"; |
| 6809 | case DW_OP_ge: |
| 6810 | return "DW_OP_ge"; |
| 6811 | case DW_OP_gt: |
| 6812 | return "DW_OP_gt"; |
| 6813 | case DW_OP_le: |
| 6814 | return "DW_OP_le"; |
| 6815 | case DW_OP_lt: |
| 6816 | return "DW_OP_lt"; |
| 6817 | case DW_OP_ne: |
| 6818 | return "DW_OP_ne"; |
| 6819 | case DW_OP_skip: |
| 6820 | return "DW_OP_skip"; |
| 6821 | case DW_OP_lit0: |
| 6822 | return "DW_OP_lit0"; |
| 6823 | case DW_OP_lit1: |
| 6824 | return "DW_OP_lit1"; |
| 6825 | case DW_OP_lit2: |
| 6826 | return "DW_OP_lit2"; |
| 6827 | case DW_OP_lit3: |
| 6828 | return "DW_OP_lit3"; |
| 6829 | case DW_OP_lit4: |
| 6830 | return "DW_OP_lit4"; |
| 6831 | case DW_OP_lit5: |
| 6832 | return "DW_OP_lit5"; |
| 6833 | case DW_OP_lit6: |
| 6834 | return "DW_OP_lit6"; |
| 6835 | case DW_OP_lit7: |
| 6836 | return "DW_OP_lit7"; |
| 6837 | case DW_OP_lit8: |
| 6838 | return "DW_OP_lit8"; |
| 6839 | case DW_OP_lit9: |
| 6840 | return "DW_OP_lit9"; |
| 6841 | case DW_OP_lit10: |
| 6842 | return "DW_OP_lit10"; |
| 6843 | case DW_OP_lit11: |
| 6844 | return "DW_OP_lit11"; |
| 6845 | case DW_OP_lit12: |
| 6846 | return "DW_OP_lit12"; |
| 6847 | case DW_OP_lit13: |
| 6848 | return "DW_OP_lit13"; |
| 6849 | case DW_OP_lit14: |
| 6850 | return "DW_OP_lit14"; |
| 6851 | case DW_OP_lit15: |
| 6852 | return "DW_OP_lit15"; |
| 6853 | case DW_OP_lit16: |
| 6854 | return "DW_OP_lit16"; |
| 6855 | case DW_OP_lit17: |
| 6856 | return "DW_OP_lit17"; |
| 6857 | case DW_OP_lit18: |
| 6858 | return "DW_OP_lit18"; |
| 6859 | case DW_OP_lit19: |
| 6860 | return "DW_OP_lit19"; |
| 6861 | case DW_OP_lit20: |
| 6862 | return "DW_OP_lit20"; |
| 6863 | case DW_OP_lit21: |
| 6864 | return "DW_OP_lit21"; |
| 6865 | case DW_OP_lit22: |
| 6866 | return "DW_OP_lit22"; |
| 6867 | case DW_OP_lit23: |
| 6868 | return "DW_OP_lit23"; |
| 6869 | case DW_OP_lit24: |
| 6870 | return "DW_OP_lit24"; |
| 6871 | case DW_OP_lit25: |
| 6872 | return "DW_OP_lit25"; |
| 6873 | case DW_OP_lit26: |
| 6874 | return "DW_OP_lit26"; |
| 6875 | case DW_OP_lit27: |
| 6876 | return "DW_OP_lit27"; |
| 6877 | case DW_OP_lit28: |
| 6878 | return "DW_OP_lit28"; |
| 6879 | case DW_OP_lit29: |
| 6880 | return "DW_OP_lit29"; |
| 6881 | case DW_OP_lit30: |
| 6882 | return "DW_OP_lit30"; |
| 6883 | case DW_OP_lit31: |
| 6884 | return "DW_OP_lit31"; |
| 6885 | case DW_OP_reg0: |
| 6886 | return "DW_OP_reg0"; |
| 6887 | case DW_OP_reg1: |
| 6888 | return "DW_OP_reg1"; |
| 6889 | case DW_OP_reg2: |
| 6890 | return "DW_OP_reg2"; |
| 6891 | case DW_OP_reg3: |
| 6892 | return "DW_OP_reg3"; |
| 6893 | case DW_OP_reg4: |
| 6894 | return "DW_OP_reg4"; |
| 6895 | case DW_OP_reg5: |
| 6896 | return "DW_OP_reg5"; |
| 6897 | case DW_OP_reg6: |
| 6898 | return "DW_OP_reg6"; |
| 6899 | case DW_OP_reg7: |
| 6900 | return "DW_OP_reg7"; |
| 6901 | case DW_OP_reg8: |
| 6902 | return "DW_OP_reg8"; |
| 6903 | case DW_OP_reg9: |
| 6904 | return "DW_OP_reg9"; |
| 6905 | case DW_OP_reg10: |
| 6906 | return "DW_OP_reg10"; |
| 6907 | case DW_OP_reg11: |
| 6908 | return "DW_OP_reg11"; |
| 6909 | case DW_OP_reg12: |
| 6910 | return "DW_OP_reg12"; |
| 6911 | case DW_OP_reg13: |
| 6912 | return "DW_OP_reg13"; |
| 6913 | case DW_OP_reg14: |
| 6914 | return "DW_OP_reg14"; |
| 6915 | case DW_OP_reg15: |
| 6916 | return "DW_OP_reg15"; |
| 6917 | case DW_OP_reg16: |
| 6918 | return "DW_OP_reg16"; |
| 6919 | case DW_OP_reg17: |
| 6920 | return "DW_OP_reg17"; |
| 6921 | case DW_OP_reg18: |
| 6922 | return "DW_OP_reg18"; |
| 6923 | case DW_OP_reg19: |
| 6924 | return "DW_OP_reg19"; |
| 6925 | case DW_OP_reg20: |
| 6926 | return "DW_OP_reg20"; |
| 6927 | case DW_OP_reg21: |
| 6928 | return "DW_OP_reg21"; |
| 6929 | case DW_OP_reg22: |
| 6930 | return "DW_OP_reg22"; |
| 6931 | case DW_OP_reg23: |
| 6932 | return "DW_OP_reg23"; |
| 6933 | case DW_OP_reg24: |
| 6934 | return "DW_OP_reg24"; |
| 6935 | case DW_OP_reg25: |
| 6936 | return "DW_OP_reg25"; |
| 6937 | case DW_OP_reg26: |
| 6938 | return "DW_OP_reg26"; |
| 6939 | case DW_OP_reg27: |
| 6940 | return "DW_OP_reg27"; |
| 6941 | case DW_OP_reg28: |
| 6942 | return "DW_OP_reg28"; |
| 6943 | case DW_OP_reg29: |
| 6944 | return "DW_OP_reg29"; |
| 6945 | case DW_OP_reg30: |
| 6946 | return "DW_OP_reg30"; |
| 6947 | case DW_OP_reg31: |
| 6948 | return "DW_OP_reg31"; |
| 6949 | case DW_OP_breg0: |
| 6950 | return "DW_OP_breg0"; |
| 6951 | case DW_OP_breg1: |
| 6952 | return "DW_OP_breg1"; |
| 6953 | case DW_OP_breg2: |
| 6954 | return "DW_OP_breg2"; |
| 6955 | case DW_OP_breg3: |
| 6956 | return "DW_OP_breg3"; |
| 6957 | case DW_OP_breg4: |
| 6958 | return "DW_OP_breg4"; |
| 6959 | case DW_OP_breg5: |
| 6960 | return "DW_OP_breg5"; |
| 6961 | case DW_OP_breg6: |
| 6962 | return "DW_OP_breg6"; |
| 6963 | case DW_OP_breg7: |
| 6964 | return "DW_OP_breg7"; |
| 6965 | case DW_OP_breg8: |
| 6966 | return "DW_OP_breg8"; |
| 6967 | case DW_OP_breg9: |
| 6968 | return "DW_OP_breg9"; |
| 6969 | case DW_OP_breg10: |
| 6970 | return "DW_OP_breg10"; |
| 6971 | case DW_OP_breg11: |
| 6972 | return "DW_OP_breg11"; |
| 6973 | case DW_OP_breg12: |
| 6974 | return "DW_OP_breg12"; |
| 6975 | case DW_OP_breg13: |
| 6976 | return "DW_OP_breg13"; |
| 6977 | case DW_OP_breg14: |
| 6978 | return "DW_OP_breg14"; |
| 6979 | case DW_OP_breg15: |
| 6980 | return "DW_OP_breg15"; |
| 6981 | case DW_OP_breg16: |
| 6982 | return "DW_OP_breg16"; |
| 6983 | case DW_OP_breg17: |
| 6984 | return "DW_OP_breg17"; |
| 6985 | case DW_OP_breg18: |
| 6986 | return "DW_OP_breg18"; |
| 6987 | case DW_OP_breg19: |
| 6988 | return "DW_OP_breg19"; |
| 6989 | case DW_OP_breg20: |
| 6990 | return "DW_OP_breg20"; |
| 6991 | case DW_OP_breg21: |
| 6992 | return "DW_OP_breg21"; |
| 6993 | case DW_OP_breg22: |
| 6994 | return "DW_OP_breg22"; |
| 6995 | case DW_OP_breg23: |
| 6996 | return "DW_OP_breg23"; |
| 6997 | case DW_OP_breg24: |
| 6998 | return "DW_OP_breg24"; |
| 6999 | case DW_OP_breg25: |
| 7000 | return "DW_OP_breg25"; |
| 7001 | case DW_OP_breg26: |
| 7002 | return "DW_OP_breg26"; |
| 7003 | case DW_OP_breg27: |
| 7004 | return "DW_OP_breg27"; |
| 7005 | case DW_OP_breg28: |
| 7006 | return "DW_OP_breg28"; |
| 7007 | case DW_OP_breg29: |
| 7008 | return "DW_OP_breg29"; |
| 7009 | case DW_OP_breg30: |
| 7010 | return "DW_OP_breg30"; |
| 7011 | case DW_OP_breg31: |
| 7012 | return "DW_OP_breg31"; |
| 7013 | case DW_OP_regx: |
| 7014 | return "DW_OP_regx"; |
| 7015 | case DW_OP_fbreg: |
| 7016 | return "DW_OP_fbreg"; |
| 7017 | case DW_OP_bregx: |
| 7018 | return "DW_OP_bregx"; |
| 7019 | case DW_OP_piece: |
| 7020 | return "DW_OP_piece"; |
| 7021 | case DW_OP_deref_size: |
| 7022 | return "DW_OP_deref_size"; |
| 7023 | case DW_OP_xderef_size: |
| 7024 | return "DW_OP_xderef_size"; |
| 7025 | case DW_OP_nop: |
| 7026 | return "DW_OP_nop"; |
| 7027 | /* DWARF 3 extensions. */ |
| 7028 | case DW_OP_push_object_address: |
| 7029 | return "DW_OP_push_object_address"; |
| 7030 | case DW_OP_call2: |
| 7031 | return "DW_OP_call2"; |
| 7032 | case DW_OP_call4: |
| 7033 | return "DW_OP_call4"; |
| 7034 | case DW_OP_call_ref: |
| 7035 | return "DW_OP_call_ref"; |
| 7036 | /* GNU extensions. */ |
| 7037 | case DW_OP_GNU_push_tls_address: |
| 7038 | return "DW_OP_GNU_push_tls_address"; |
| 7039 | default: |
| 7040 | return "OP_<unknown>"; |
| 7041 | } |
| 7042 | } |
| 7043 | |
| 7044 | static char * |
| 7045 | dwarf_bool_name (unsigned mybool) |
| 7046 | { |
| 7047 | if (mybool) |
| 7048 | return "TRUE"; |
| 7049 | else |
| 7050 | return "FALSE"; |
| 7051 | } |
| 7052 | |
| 7053 | /* Convert a DWARF type code into its string name. */ |
| 7054 | |
| 7055 | static char * |
| 7056 | dwarf_type_encoding_name (unsigned enc) |
| 7057 | { |
| 7058 | switch (enc) |
| 7059 | { |
| 7060 | case DW_ATE_address: |
| 7061 | return "DW_ATE_address"; |
| 7062 | case DW_ATE_boolean: |
| 7063 | return "DW_ATE_boolean"; |
| 7064 | case DW_ATE_complex_float: |
| 7065 | return "DW_ATE_complex_float"; |
| 7066 | case DW_ATE_float: |
| 7067 | return "DW_ATE_float"; |
| 7068 | case DW_ATE_signed: |
| 7069 | return "DW_ATE_signed"; |
| 7070 | case DW_ATE_signed_char: |
| 7071 | return "DW_ATE_signed_char"; |
| 7072 | case DW_ATE_unsigned: |
| 7073 | return "DW_ATE_unsigned"; |
| 7074 | case DW_ATE_unsigned_char: |
| 7075 | return "DW_ATE_unsigned_char"; |
| 7076 | case DW_ATE_imaginary_float: |
| 7077 | return "DW_ATE_imaginary_float"; |
| 7078 | default: |
| 7079 | return "DW_ATE_<unknown>"; |
| 7080 | } |
| 7081 | } |
| 7082 | |
| 7083 | /* Convert a DWARF call frame info operation to its string name. */ |
| 7084 | |
| 7085 | #if 0 |
| 7086 | static char * |
| 7087 | dwarf_cfi_name (unsigned cfi_opc) |
| 7088 | { |
| 7089 | switch (cfi_opc) |
| 7090 | { |
| 7091 | case DW_CFA_advance_loc: |
| 7092 | return "DW_CFA_advance_loc"; |
| 7093 | case DW_CFA_offset: |
| 7094 | return "DW_CFA_offset"; |
| 7095 | case DW_CFA_restore: |
| 7096 | return "DW_CFA_restore"; |
| 7097 | case DW_CFA_nop: |
| 7098 | return "DW_CFA_nop"; |
| 7099 | case DW_CFA_set_loc: |
| 7100 | return "DW_CFA_set_loc"; |
| 7101 | case DW_CFA_advance_loc1: |
| 7102 | return "DW_CFA_advance_loc1"; |
| 7103 | case DW_CFA_advance_loc2: |
| 7104 | return "DW_CFA_advance_loc2"; |
| 7105 | case DW_CFA_advance_loc4: |
| 7106 | return "DW_CFA_advance_loc4"; |
| 7107 | case DW_CFA_offset_extended: |
| 7108 | return "DW_CFA_offset_extended"; |
| 7109 | case DW_CFA_restore_extended: |
| 7110 | return "DW_CFA_restore_extended"; |
| 7111 | case DW_CFA_undefined: |
| 7112 | return "DW_CFA_undefined"; |
| 7113 | case DW_CFA_same_value: |
| 7114 | return "DW_CFA_same_value"; |
| 7115 | case DW_CFA_register: |
| 7116 | return "DW_CFA_register"; |
| 7117 | case DW_CFA_remember_state: |
| 7118 | return "DW_CFA_remember_state"; |
| 7119 | case DW_CFA_restore_state: |
| 7120 | return "DW_CFA_restore_state"; |
| 7121 | case DW_CFA_def_cfa: |
| 7122 | return "DW_CFA_def_cfa"; |
| 7123 | case DW_CFA_def_cfa_register: |
| 7124 | return "DW_CFA_def_cfa_register"; |
| 7125 | case DW_CFA_def_cfa_offset: |
| 7126 | return "DW_CFA_def_cfa_offset"; |
| 7127 | |
| 7128 | /* DWARF 3 */ |
| 7129 | case DW_CFA_def_cfa_expression: |
| 7130 | return "DW_CFA_def_cfa_expression"; |
| 7131 | case DW_CFA_expression: |
| 7132 | return "DW_CFA_expression"; |
| 7133 | case DW_CFA_offset_extended_sf: |
| 7134 | return "DW_CFA_offset_extended_sf"; |
| 7135 | case DW_CFA_def_cfa_sf: |
| 7136 | return "DW_CFA_def_cfa_sf"; |
| 7137 | case DW_CFA_def_cfa_offset_sf: |
| 7138 | return "DW_CFA_def_cfa_offset_sf"; |
| 7139 | |
| 7140 | /* SGI/MIPS specific */ |
| 7141 | case DW_CFA_MIPS_advance_loc8: |
| 7142 | return "DW_CFA_MIPS_advance_loc8"; |
| 7143 | |
| 7144 | /* GNU extensions */ |
| 7145 | case DW_CFA_GNU_window_save: |
| 7146 | return "DW_CFA_GNU_window_save"; |
| 7147 | case DW_CFA_GNU_args_size: |
| 7148 | return "DW_CFA_GNU_args_size"; |
| 7149 | case DW_CFA_GNU_negative_offset_extended: |
| 7150 | return "DW_CFA_GNU_negative_offset_extended"; |
| 7151 | |
| 7152 | default: |
| 7153 | return "DW_CFA_<unknown>"; |
| 7154 | } |
| 7155 | } |
| 7156 | #endif |
| 7157 | |
| 7158 | static void |
| 7159 | dump_die (struct die_info *die) |
| 7160 | { |
| 7161 | unsigned int i; |
| 7162 | |
| 7163 | fprintf_unfiltered (gdb_stderr, "Die: %s (abbrev = %d, offset = %d)\n", |
| 7164 | dwarf_tag_name (die->tag), die->abbrev, die->offset); |
| 7165 | fprintf_unfiltered (gdb_stderr, "\thas children: %s\n", |
| 7166 | dwarf_bool_name (die->child != NULL)); |
| 7167 | |
| 7168 | fprintf_unfiltered (gdb_stderr, "\tattributes:\n"); |
| 7169 | for (i = 0; i < die->num_attrs; ++i) |
| 7170 | { |
| 7171 | fprintf_unfiltered (gdb_stderr, "\t\t%s (%s) ", |
| 7172 | dwarf_attr_name (die->attrs[i].name), |
| 7173 | dwarf_form_name (die->attrs[i].form)); |
| 7174 | switch (die->attrs[i].form) |
| 7175 | { |
| 7176 | case DW_FORM_ref_addr: |
| 7177 | case DW_FORM_addr: |
| 7178 | fprintf_unfiltered (gdb_stderr, "address: "); |
| 7179 | print_address_numeric (DW_ADDR (&die->attrs[i]), 1, gdb_stderr); |
| 7180 | break; |
| 7181 | case DW_FORM_block2: |
| 7182 | case DW_FORM_block4: |
| 7183 | case DW_FORM_block: |
| 7184 | case DW_FORM_block1: |
| 7185 | fprintf_unfiltered (gdb_stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size); |
| 7186 | break; |
| 7187 | case DW_FORM_data1: |
| 7188 | case DW_FORM_data2: |
| 7189 | case DW_FORM_data4: |
| 7190 | case DW_FORM_data8: |
| 7191 | case DW_FORM_ref1: |
| 7192 | case DW_FORM_ref2: |
| 7193 | case DW_FORM_ref4: |
| 7194 | case DW_FORM_udata: |
| 7195 | case DW_FORM_sdata: |
| 7196 | fprintf_unfiltered (gdb_stderr, "constant: %ld", DW_UNSND (&die->attrs[i])); |
| 7197 | break; |
| 7198 | case DW_FORM_string: |
| 7199 | case DW_FORM_strp: |
| 7200 | fprintf_unfiltered (gdb_stderr, "string: \"%s\"", |
| 7201 | DW_STRING (&die->attrs[i]) |
| 7202 | ? DW_STRING (&die->attrs[i]) : ""); |
| 7203 | break; |
| 7204 | case DW_FORM_flag: |
| 7205 | if (DW_UNSND (&die->attrs[i])) |
| 7206 | fprintf_unfiltered (gdb_stderr, "flag: TRUE"); |
| 7207 | else |
| 7208 | fprintf_unfiltered (gdb_stderr, "flag: FALSE"); |
| 7209 | break; |
| 7210 | case DW_FORM_indirect: |
| 7211 | /* the reader will have reduced the indirect form to |
| 7212 | the "base form" so this form should not occur */ |
| 7213 | fprintf_unfiltered (gdb_stderr, "unexpected attribute form: DW_FORM_indirect"); |
| 7214 | break; |
| 7215 | default: |
| 7216 | fprintf_unfiltered (gdb_stderr, "unsupported attribute form: %d.", |
| 7217 | die->attrs[i].form); |
| 7218 | } |
| 7219 | fprintf_unfiltered (gdb_stderr, "\n"); |
| 7220 | } |
| 7221 | } |
| 7222 | |
| 7223 | static void |
| 7224 | dump_die_list (struct die_info *die) |
| 7225 | { |
| 7226 | while (die) |
| 7227 | { |
| 7228 | dump_die (die); |
| 7229 | if (die->child != NULL) |
| 7230 | dump_die_list (die->child); |
| 7231 | if (die->sibling != NULL) |
| 7232 | dump_die_list (die->sibling); |
| 7233 | } |
| 7234 | } |
| 7235 | |
| 7236 | static void |
| 7237 | store_in_ref_table (unsigned int offset, struct die_info *die) |
| 7238 | { |
| 7239 | int h; |
| 7240 | struct die_info *old; |
| 7241 | |
| 7242 | h = (offset % REF_HASH_SIZE); |
| 7243 | old = die_ref_table[h]; |
| 7244 | die->next_ref = old; |
| 7245 | die_ref_table[h] = die; |
| 7246 | } |
| 7247 | |
| 7248 | |
| 7249 | static void |
| 7250 | dwarf2_empty_hash_tables (void) |
| 7251 | { |
| 7252 | memset (die_ref_table, 0, sizeof (die_ref_table)); |
| 7253 | } |
| 7254 | |
| 7255 | static unsigned int |
| 7256 | dwarf2_get_ref_die_offset (struct attribute *attr, struct dwarf2_cu *cu) |
| 7257 | { |
| 7258 | unsigned int result = 0; |
| 7259 | |
| 7260 | switch (attr->form) |
| 7261 | { |
| 7262 | case DW_FORM_ref_addr: |
| 7263 | result = DW_ADDR (attr); |
| 7264 | break; |
| 7265 | case DW_FORM_ref1: |
| 7266 | case DW_FORM_ref2: |
| 7267 | case DW_FORM_ref4: |
| 7268 | case DW_FORM_ref8: |
| 7269 | case DW_FORM_ref_udata: |
| 7270 | result = cu->header.offset + DW_UNSND (attr); |
| 7271 | break; |
| 7272 | default: |
| 7273 | complaint (&symfile_complaints, |
| 7274 | "unsupported die ref attribute form: '%s'", |
| 7275 | dwarf_form_name (attr->form)); |
| 7276 | } |
| 7277 | return result; |
| 7278 | } |
| 7279 | |
| 7280 | /* Return the constant value held by the given attribute. Return -1 |
| 7281 | if the value held by the attribute is not constant. */ |
| 7282 | |
| 7283 | static int |
| 7284 | dwarf2_get_attr_constant_value (struct attribute *attr, int default_value) |
| 7285 | { |
| 7286 | if (attr->form == DW_FORM_sdata) |
| 7287 | return DW_SND (attr); |
| 7288 | else if (attr->form == DW_FORM_udata |
| 7289 | || attr->form == DW_FORM_data1 |
| 7290 | || attr->form == DW_FORM_data2 |
| 7291 | || attr->form == DW_FORM_data4 |
| 7292 | || attr->form == DW_FORM_data8) |
| 7293 | return DW_UNSND (attr); |
| 7294 | else |
| 7295 | { |
| 7296 | complaint (&symfile_complaints, "Attribute value is not a constant (%s)", |
| 7297 | dwarf_form_name (attr->form)); |
| 7298 | return default_value; |
| 7299 | } |
| 7300 | } |
| 7301 | |
| 7302 | static struct die_info * |
| 7303 | follow_die_ref (unsigned int offset) |
| 7304 | { |
| 7305 | struct die_info *die; |
| 7306 | int h; |
| 7307 | |
| 7308 | h = (offset % REF_HASH_SIZE); |
| 7309 | die = die_ref_table[h]; |
| 7310 | while (die) |
| 7311 | { |
| 7312 | if (die->offset == offset) |
| 7313 | { |
| 7314 | return die; |
| 7315 | } |
| 7316 | die = die->next_ref; |
| 7317 | } |
| 7318 | return NULL; |
| 7319 | } |
| 7320 | |
| 7321 | static struct type * |
| 7322 | dwarf2_fundamental_type (struct objfile *objfile, int typeid, |
| 7323 | struct dwarf2_cu *cu) |
| 7324 | { |
| 7325 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) |
| 7326 | { |
| 7327 | error ("Dwarf Error: internal error - invalid fundamental type id %d [in module %s]", |
| 7328 | typeid, objfile->name); |
| 7329 | } |
| 7330 | |
| 7331 | /* Look for this particular type in the fundamental type vector. If |
| 7332 | one is not found, create and install one appropriate for the |
| 7333 | current language and the current target machine. */ |
| 7334 | |
| 7335 | if (cu->ftypes[typeid] == NULL) |
| 7336 | { |
| 7337 | cu->ftypes[typeid] = cu->language_defn->la_fund_type (objfile, typeid); |
| 7338 | } |
| 7339 | |
| 7340 | return (cu->ftypes[typeid]); |
| 7341 | } |
| 7342 | |
| 7343 | /* Decode simple location descriptions. |
| 7344 | Given a pointer to a dwarf block that defines a location, compute |
| 7345 | the location and return the value. |
| 7346 | |
| 7347 | NOTE drow/2003-11-18: This function is called in two situations |
| 7348 | now: for the address of static or global variables (partial symbols |
| 7349 | only) and for offsets into structures which are expected to be |
| 7350 | (more or less) constant. The partial symbol case should go away, |
| 7351 | and only the constant case should remain. That will let this |
| 7352 | function complain more accurately. A few special modes are allowed |
| 7353 | without complaint for global variables (for instance, global |
| 7354 | register values and thread-local values). |
| 7355 | |
| 7356 | A location description containing no operations indicates that the |
| 7357 | object is optimized out. The return value is 0 for that case. |
| 7358 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
| 7359 | callers will only want a very basic result and this can become a |
| 7360 | complaint. |
| 7361 | |
| 7362 | When the result is a register number, the global isreg flag is set, |
| 7363 | otherwise it is cleared. |
| 7364 | |
| 7365 | Note that stack[0] is unused except as a default error return. |
| 7366 | Note that stack overflow is not yet handled. */ |
| 7367 | |
| 7368 | static CORE_ADDR |
| 7369 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
| 7370 | { |
| 7371 | struct objfile *objfile = cu->objfile; |
| 7372 | struct comp_unit_head *cu_header = &cu->header; |
| 7373 | int i; |
| 7374 | int size = blk->size; |
| 7375 | char *data = blk->data; |
| 7376 | CORE_ADDR stack[64]; |
| 7377 | int stacki; |
| 7378 | unsigned int bytes_read, unsnd; |
| 7379 | unsigned char op; |
| 7380 | |
| 7381 | i = 0; |
| 7382 | stacki = 0; |
| 7383 | stack[stacki] = 0; |
| 7384 | isreg = 0; |
| 7385 | |
| 7386 | while (i < size) |
| 7387 | { |
| 7388 | op = data[i++]; |
| 7389 | switch (op) |
| 7390 | { |
| 7391 | case DW_OP_lit0: |
| 7392 | case DW_OP_lit1: |
| 7393 | case DW_OP_lit2: |
| 7394 | case DW_OP_lit3: |
| 7395 | case DW_OP_lit4: |
| 7396 | case DW_OP_lit5: |
| 7397 | case DW_OP_lit6: |
| 7398 | case DW_OP_lit7: |
| 7399 | case DW_OP_lit8: |
| 7400 | case DW_OP_lit9: |
| 7401 | case DW_OP_lit10: |
| 7402 | case DW_OP_lit11: |
| 7403 | case DW_OP_lit12: |
| 7404 | case DW_OP_lit13: |
| 7405 | case DW_OP_lit14: |
| 7406 | case DW_OP_lit15: |
| 7407 | case DW_OP_lit16: |
| 7408 | case DW_OP_lit17: |
| 7409 | case DW_OP_lit18: |
| 7410 | case DW_OP_lit19: |
| 7411 | case DW_OP_lit20: |
| 7412 | case DW_OP_lit21: |
| 7413 | case DW_OP_lit22: |
| 7414 | case DW_OP_lit23: |
| 7415 | case DW_OP_lit24: |
| 7416 | case DW_OP_lit25: |
| 7417 | case DW_OP_lit26: |
| 7418 | case DW_OP_lit27: |
| 7419 | case DW_OP_lit28: |
| 7420 | case DW_OP_lit29: |
| 7421 | case DW_OP_lit30: |
| 7422 | case DW_OP_lit31: |
| 7423 | stack[++stacki] = op - DW_OP_lit0; |
| 7424 | break; |
| 7425 | |
| 7426 | case DW_OP_reg0: |
| 7427 | case DW_OP_reg1: |
| 7428 | case DW_OP_reg2: |
| 7429 | case DW_OP_reg3: |
| 7430 | case DW_OP_reg4: |
| 7431 | case DW_OP_reg5: |
| 7432 | case DW_OP_reg6: |
| 7433 | case DW_OP_reg7: |
| 7434 | case DW_OP_reg8: |
| 7435 | case DW_OP_reg9: |
| 7436 | case DW_OP_reg10: |
| 7437 | case DW_OP_reg11: |
| 7438 | case DW_OP_reg12: |
| 7439 | case DW_OP_reg13: |
| 7440 | case DW_OP_reg14: |
| 7441 | case DW_OP_reg15: |
| 7442 | case DW_OP_reg16: |
| 7443 | case DW_OP_reg17: |
| 7444 | case DW_OP_reg18: |
| 7445 | case DW_OP_reg19: |
| 7446 | case DW_OP_reg20: |
| 7447 | case DW_OP_reg21: |
| 7448 | case DW_OP_reg22: |
| 7449 | case DW_OP_reg23: |
| 7450 | case DW_OP_reg24: |
| 7451 | case DW_OP_reg25: |
| 7452 | case DW_OP_reg26: |
| 7453 | case DW_OP_reg27: |
| 7454 | case DW_OP_reg28: |
| 7455 | case DW_OP_reg29: |
| 7456 | case DW_OP_reg30: |
| 7457 | case DW_OP_reg31: |
| 7458 | isreg = 1; |
| 7459 | stack[++stacki] = op - DW_OP_reg0; |
| 7460 | if (i < size) |
| 7461 | dwarf2_complex_location_expr_complaint (); |
| 7462 | break; |
| 7463 | |
| 7464 | case DW_OP_regx: |
| 7465 | isreg = 1; |
| 7466 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); |
| 7467 | i += bytes_read; |
| 7468 | stack[++stacki] = unsnd; |
| 7469 | if (i < size) |
| 7470 | dwarf2_complex_location_expr_complaint (); |
| 7471 | break; |
| 7472 | |
| 7473 | case DW_OP_addr: |
| 7474 | stack[++stacki] = read_address (objfile->obfd, &data[i], |
| 7475 | cu, &bytes_read); |
| 7476 | i += bytes_read; |
| 7477 | break; |
| 7478 | |
| 7479 | case DW_OP_const1u: |
| 7480 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); |
| 7481 | i += 1; |
| 7482 | break; |
| 7483 | |
| 7484 | case DW_OP_const1s: |
| 7485 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); |
| 7486 | i += 1; |
| 7487 | break; |
| 7488 | |
| 7489 | case DW_OP_const2u: |
| 7490 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); |
| 7491 | i += 2; |
| 7492 | break; |
| 7493 | |
| 7494 | case DW_OP_const2s: |
| 7495 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); |
| 7496 | i += 2; |
| 7497 | break; |
| 7498 | |
| 7499 | case DW_OP_const4u: |
| 7500 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); |
| 7501 | i += 4; |
| 7502 | break; |
| 7503 | |
| 7504 | case DW_OP_const4s: |
| 7505 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); |
| 7506 | i += 4; |
| 7507 | break; |
| 7508 | |
| 7509 | case DW_OP_constu: |
| 7510 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), |
| 7511 | &bytes_read); |
| 7512 | i += bytes_read; |
| 7513 | break; |
| 7514 | |
| 7515 | case DW_OP_consts: |
| 7516 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); |
| 7517 | i += bytes_read; |
| 7518 | break; |
| 7519 | |
| 7520 | case DW_OP_dup: |
| 7521 | stack[stacki + 1] = stack[stacki]; |
| 7522 | stacki++; |
| 7523 | break; |
| 7524 | |
| 7525 | case DW_OP_plus: |
| 7526 | stack[stacki - 1] += stack[stacki]; |
| 7527 | stacki--; |
| 7528 | break; |
| 7529 | |
| 7530 | case DW_OP_plus_uconst: |
| 7531 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read); |
| 7532 | i += bytes_read; |
| 7533 | break; |
| 7534 | |
| 7535 | case DW_OP_minus: |
| 7536 | stack[stacki - 1] -= stack[stacki]; |
| 7537 | stacki--; |
| 7538 | break; |
| 7539 | |
| 7540 | case DW_OP_deref: |
| 7541 | /* If we're not the last op, then we definitely can't encode |
| 7542 | this using GDB's address_class enum. This is valid for partial |
| 7543 | global symbols, although the variable's address will be bogus |
| 7544 | in the psymtab. */ |
| 7545 | if (i < size) |
| 7546 | dwarf2_complex_location_expr_complaint (); |
| 7547 | break; |
| 7548 | |
| 7549 | case DW_OP_GNU_push_tls_address: |
| 7550 | /* The top of the stack has the offset from the beginning |
| 7551 | of the thread control block at which the variable is located. */ |
| 7552 | /* Nothing should follow this operator, so the top of stack would |
| 7553 | be returned. */ |
| 7554 | /* This is valid for partial global symbols, but the variable's |
| 7555 | address will be bogus in the psymtab. */ |
| 7556 | if (i < size) |
| 7557 | dwarf2_complex_location_expr_complaint (); |
| 7558 | break; |
| 7559 | |
| 7560 | default: |
| 7561 | complaint (&symfile_complaints, "unsupported stack op: '%s'", |
| 7562 | dwarf_stack_op_name (op)); |
| 7563 | return (stack[stacki]); |
| 7564 | } |
| 7565 | } |
| 7566 | return (stack[stacki]); |
| 7567 | } |
| 7568 | |
| 7569 | /* memory allocation interface */ |
| 7570 | |
| 7571 | static void |
| 7572 | dwarf2_free_tmp_obstack (void *ignore) |
| 7573 | { |
| 7574 | obstack_free (&dwarf2_tmp_obstack, NULL); |
| 7575 | } |
| 7576 | |
| 7577 | static struct dwarf_block * |
| 7578 | dwarf_alloc_block (void) |
| 7579 | { |
| 7580 | struct dwarf_block *blk; |
| 7581 | |
| 7582 | blk = (struct dwarf_block *) |
| 7583 | obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct dwarf_block)); |
| 7584 | return (blk); |
| 7585 | } |
| 7586 | |
| 7587 | static struct abbrev_info * |
| 7588 | dwarf_alloc_abbrev (void) |
| 7589 | { |
| 7590 | struct abbrev_info *abbrev; |
| 7591 | |
| 7592 | abbrev = (struct abbrev_info *) xmalloc (sizeof (struct abbrev_info)); |
| 7593 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
| 7594 | return (abbrev); |
| 7595 | } |
| 7596 | |
| 7597 | static struct die_info * |
| 7598 | dwarf_alloc_die (void) |
| 7599 | { |
| 7600 | struct die_info *die; |
| 7601 | |
| 7602 | die = (struct die_info *) xmalloc (sizeof (struct die_info)); |
| 7603 | memset (die, 0, sizeof (struct die_info)); |
| 7604 | return (die); |
| 7605 | } |
| 7606 | |
| 7607 | \f |
| 7608 | /* Macro support. */ |
| 7609 | |
| 7610 | |
| 7611 | /* Return the full name of file number I in *LH's file name table. |
| 7612 | Use COMP_DIR as the name of the current directory of the |
| 7613 | compilation. The result is allocated using xmalloc; the caller is |
| 7614 | responsible for freeing it. */ |
| 7615 | static char * |
| 7616 | file_full_name (int file, struct line_header *lh, const char *comp_dir) |
| 7617 | { |
| 7618 | struct file_entry *fe = &lh->file_names[file - 1]; |
| 7619 | |
| 7620 | if (IS_ABSOLUTE_PATH (fe->name)) |
| 7621 | return xstrdup (fe->name); |
| 7622 | else |
| 7623 | { |
| 7624 | const char *dir; |
| 7625 | int dir_len; |
| 7626 | char *full_name; |
| 7627 | |
| 7628 | if (fe->dir_index) |
| 7629 | dir = lh->include_dirs[fe->dir_index - 1]; |
| 7630 | else |
| 7631 | dir = comp_dir; |
| 7632 | |
| 7633 | if (dir) |
| 7634 | { |
| 7635 | dir_len = strlen (dir); |
| 7636 | full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1); |
| 7637 | strcpy (full_name, dir); |
| 7638 | full_name[dir_len] = '/'; |
| 7639 | strcpy (full_name + dir_len + 1, fe->name); |
| 7640 | return full_name; |
| 7641 | } |
| 7642 | else |
| 7643 | return xstrdup (fe->name); |
| 7644 | } |
| 7645 | } |
| 7646 | |
| 7647 | |
| 7648 | static struct macro_source_file * |
| 7649 | macro_start_file (int file, int line, |
| 7650 | struct macro_source_file *current_file, |
| 7651 | const char *comp_dir, |
| 7652 | struct line_header *lh, struct objfile *objfile) |
| 7653 | { |
| 7654 | /* The full name of this source file. */ |
| 7655 | char *full_name = file_full_name (file, lh, comp_dir); |
| 7656 | |
| 7657 | /* We don't create a macro table for this compilation unit |
| 7658 | at all until we actually get a filename. */ |
| 7659 | if (! pending_macros) |
| 7660 | pending_macros = new_macro_table (&objfile->objfile_obstack, |
| 7661 | objfile->macro_cache); |
| 7662 | |
| 7663 | if (! current_file) |
| 7664 | /* If we have no current file, then this must be the start_file |
| 7665 | directive for the compilation unit's main source file. */ |
| 7666 | current_file = macro_set_main (pending_macros, full_name); |
| 7667 | else |
| 7668 | current_file = macro_include (current_file, line, full_name); |
| 7669 | |
| 7670 | xfree (full_name); |
| 7671 | |
| 7672 | return current_file; |
| 7673 | } |
| 7674 | |
| 7675 | |
| 7676 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, |
| 7677 | followed by a null byte. */ |
| 7678 | static char * |
| 7679 | copy_string (const char *buf, int len) |
| 7680 | { |
| 7681 | char *s = xmalloc (len + 1); |
| 7682 | memcpy (s, buf, len); |
| 7683 | s[len] = '\0'; |
| 7684 | |
| 7685 | return s; |
| 7686 | } |
| 7687 | |
| 7688 | |
| 7689 | static const char * |
| 7690 | consume_improper_spaces (const char *p, const char *body) |
| 7691 | { |
| 7692 | if (*p == ' ') |
| 7693 | { |
| 7694 | complaint (&symfile_complaints, |
| 7695 | "macro definition contains spaces in formal argument list:\n`%s'", |
| 7696 | body); |
| 7697 | |
| 7698 | while (*p == ' ') |
| 7699 | p++; |
| 7700 | } |
| 7701 | |
| 7702 | return p; |
| 7703 | } |
| 7704 | |
| 7705 | |
| 7706 | static void |
| 7707 | parse_macro_definition (struct macro_source_file *file, int line, |
| 7708 | const char *body) |
| 7709 | { |
| 7710 | const char *p; |
| 7711 | |
| 7712 | /* The body string takes one of two forms. For object-like macro |
| 7713 | definitions, it should be: |
| 7714 | |
| 7715 | <macro name> " " <definition> |
| 7716 | |
| 7717 | For function-like macro definitions, it should be: |
| 7718 | |
| 7719 | <macro name> "() " <definition> |
| 7720 | or |
| 7721 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> |
| 7722 | |
| 7723 | Spaces may appear only where explicitly indicated, and in the |
| 7724 | <definition>. |
| 7725 | |
| 7726 | The Dwarf 2 spec says that an object-like macro's name is always |
| 7727 | followed by a space, but versions of GCC around March 2002 omit |
| 7728 | the space when the macro's definition is the empty string. |
| 7729 | |
| 7730 | The Dwarf 2 spec says that there should be no spaces between the |
| 7731 | formal arguments in a function-like macro's formal argument list, |
| 7732 | but versions of GCC around March 2002 include spaces after the |
| 7733 | commas. */ |
| 7734 | |
| 7735 | |
| 7736 | /* Find the extent of the macro name. The macro name is terminated |
| 7737 | by either a space or null character (for an object-like macro) or |
| 7738 | an opening paren (for a function-like macro). */ |
| 7739 | for (p = body; *p; p++) |
| 7740 | if (*p == ' ' || *p == '(') |
| 7741 | break; |
| 7742 | |
| 7743 | if (*p == ' ' || *p == '\0') |
| 7744 | { |
| 7745 | /* It's an object-like macro. */ |
| 7746 | int name_len = p - body; |
| 7747 | char *name = copy_string (body, name_len); |
| 7748 | const char *replacement; |
| 7749 | |
| 7750 | if (*p == ' ') |
| 7751 | replacement = body + name_len + 1; |
| 7752 | else |
| 7753 | { |
| 7754 | dwarf2_macro_malformed_definition_complaint (body); |
| 7755 | replacement = body + name_len; |
| 7756 | } |
| 7757 | |
| 7758 | macro_define_object (file, line, name, replacement); |
| 7759 | |
| 7760 | xfree (name); |
| 7761 | } |
| 7762 | else if (*p == '(') |
| 7763 | { |
| 7764 | /* It's a function-like macro. */ |
| 7765 | char *name = copy_string (body, p - body); |
| 7766 | int argc = 0; |
| 7767 | int argv_size = 1; |
| 7768 | char **argv = xmalloc (argv_size * sizeof (*argv)); |
| 7769 | |
| 7770 | p++; |
| 7771 | |
| 7772 | p = consume_improper_spaces (p, body); |
| 7773 | |
| 7774 | /* Parse the formal argument list. */ |
| 7775 | while (*p && *p != ')') |
| 7776 | { |
| 7777 | /* Find the extent of the current argument name. */ |
| 7778 | const char *arg_start = p; |
| 7779 | |
| 7780 | while (*p && *p != ',' && *p != ')' && *p != ' ') |
| 7781 | p++; |
| 7782 | |
| 7783 | if (! *p || p == arg_start) |
| 7784 | dwarf2_macro_malformed_definition_complaint (body); |
| 7785 | else |
| 7786 | { |
| 7787 | /* Make sure argv has room for the new argument. */ |
| 7788 | if (argc >= argv_size) |
| 7789 | { |
| 7790 | argv_size *= 2; |
| 7791 | argv = xrealloc (argv, argv_size * sizeof (*argv)); |
| 7792 | } |
| 7793 | |
| 7794 | argv[argc++] = copy_string (arg_start, p - arg_start); |
| 7795 | } |
| 7796 | |
| 7797 | p = consume_improper_spaces (p, body); |
| 7798 | |
| 7799 | /* Consume the comma, if present. */ |
| 7800 | if (*p == ',') |
| 7801 | { |
| 7802 | p++; |
| 7803 | |
| 7804 | p = consume_improper_spaces (p, body); |
| 7805 | } |
| 7806 | } |
| 7807 | |
| 7808 | if (*p == ')') |
| 7809 | { |
| 7810 | p++; |
| 7811 | |
| 7812 | if (*p == ' ') |
| 7813 | /* Perfectly formed definition, no complaints. */ |
| 7814 | macro_define_function (file, line, name, |
| 7815 | argc, (const char **) argv, |
| 7816 | p + 1); |
| 7817 | else if (*p == '\0') |
| 7818 | { |
| 7819 | /* Complain, but do define it. */ |
| 7820 | dwarf2_macro_malformed_definition_complaint (body); |
| 7821 | macro_define_function (file, line, name, |
| 7822 | argc, (const char **) argv, |
| 7823 | p); |
| 7824 | } |
| 7825 | else |
| 7826 | /* Just complain. */ |
| 7827 | dwarf2_macro_malformed_definition_complaint (body); |
| 7828 | } |
| 7829 | else |
| 7830 | /* Just complain. */ |
| 7831 | dwarf2_macro_malformed_definition_complaint (body); |
| 7832 | |
| 7833 | xfree (name); |
| 7834 | { |
| 7835 | int i; |
| 7836 | |
| 7837 | for (i = 0; i < argc; i++) |
| 7838 | xfree (argv[i]); |
| 7839 | } |
| 7840 | xfree (argv); |
| 7841 | } |
| 7842 | else |
| 7843 | dwarf2_macro_malformed_definition_complaint (body); |
| 7844 | } |
| 7845 | |
| 7846 | |
| 7847 | static void |
| 7848 | dwarf_decode_macros (struct line_header *lh, unsigned int offset, |
| 7849 | char *comp_dir, bfd *abfd, |
| 7850 | struct dwarf2_cu *cu) |
| 7851 | { |
| 7852 | char *mac_ptr, *mac_end; |
| 7853 | struct macro_source_file *current_file = 0; |
| 7854 | |
| 7855 | if (dwarf_macinfo_buffer == NULL) |
| 7856 | { |
| 7857 | complaint (&symfile_complaints, "missing .debug_macinfo section"); |
| 7858 | return; |
| 7859 | } |
| 7860 | |
| 7861 | mac_ptr = dwarf_macinfo_buffer + offset; |
| 7862 | mac_end = dwarf_macinfo_buffer + dwarf_macinfo_size; |
| 7863 | |
| 7864 | for (;;) |
| 7865 | { |
| 7866 | enum dwarf_macinfo_record_type macinfo_type; |
| 7867 | |
| 7868 | /* Do we at least have room for a macinfo type byte? */ |
| 7869 | if (mac_ptr >= mac_end) |
| 7870 | { |
| 7871 | dwarf2_macros_too_long_complaint (); |
| 7872 | return; |
| 7873 | } |
| 7874 | |
| 7875 | macinfo_type = read_1_byte (abfd, mac_ptr); |
| 7876 | mac_ptr++; |
| 7877 | |
| 7878 | switch (macinfo_type) |
| 7879 | { |
| 7880 | /* A zero macinfo type indicates the end of the macro |
| 7881 | information. */ |
| 7882 | case 0: |
| 7883 | return; |
| 7884 | |
| 7885 | case DW_MACINFO_define: |
| 7886 | case DW_MACINFO_undef: |
| 7887 | { |
| 7888 | int bytes_read; |
| 7889 | int line; |
| 7890 | char *body; |
| 7891 | |
| 7892 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 7893 | mac_ptr += bytes_read; |
| 7894 | body = read_string (abfd, mac_ptr, &bytes_read); |
| 7895 | mac_ptr += bytes_read; |
| 7896 | |
| 7897 | if (! current_file) |
| 7898 | complaint (&symfile_complaints, |
| 7899 | "debug info gives macro %s outside of any file: %s", |
| 7900 | macinfo_type == |
| 7901 | DW_MACINFO_define ? "definition" : macinfo_type == |
| 7902 | DW_MACINFO_undef ? "undefinition" : |
| 7903 | "something-or-other", body); |
| 7904 | else |
| 7905 | { |
| 7906 | if (macinfo_type == DW_MACINFO_define) |
| 7907 | parse_macro_definition (current_file, line, body); |
| 7908 | else if (macinfo_type == DW_MACINFO_undef) |
| 7909 | macro_undef (current_file, line, body); |
| 7910 | } |
| 7911 | } |
| 7912 | break; |
| 7913 | |
| 7914 | case DW_MACINFO_start_file: |
| 7915 | { |
| 7916 | int bytes_read; |
| 7917 | int line, file; |
| 7918 | |
| 7919 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 7920 | mac_ptr += bytes_read; |
| 7921 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 7922 | mac_ptr += bytes_read; |
| 7923 | |
| 7924 | current_file = macro_start_file (file, line, |
| 7925 | current_file, comp_dir, |
| 7926 | lh, cu->objfile); |
| 7927 | } |
| 7928 | break; |
| 7929 | |
| 7930 | case DW_MACINFO_end_file: |
| 7931 | if (! current_file) |
| 7932 | complaint (&symfile_complaints, |
| 7933 | "macro debug info has an unmatched `close_file' directive"); |
| 7934 | else |
| 7935 | { |
| 7936 | current_file = current_file->included_by; |
| 7937 | if (! current_file) |
| 7938 | { |
| 7939 | enum dwarf_macinfo_record_type next_type; |
| 7940 | |
| 7941 | /* GCC circa March 2002 doesn't produce the zero |
| 7942 | type byte marking the end of the compilation |
| 7943 | unit. Complain if it's not there, but exit no |
| 7944 | matter what. */ |
| 7945 | |
| 7946 | /* Do we at least have room for a macinfo type byte? */ |
| 7947 | if (mac_ptr >= mac_end) |
| 7948 | { |
| 7949 | dwarf2_macros_too_long_complaint (); |
| 7950 | return; |
| 7951 | } |
| 7952 | |
| 7953 | /* We don't increment mac_ptr here, so this is just |
| 7954 | a look-ahead. */ |
| 7955 | next_type = read_1_byte (abfd, mac_ptr); |
| 7956 | if (next_type != 0) |
| 7957 | complaint (&symfile_complaints, |
| 7958 | "no terminating 0-type entry for macros in `.debug_macinfo' section"); |
| 7959 | |
| 7960 | return; |
| 7961 | } |
| 7962 | } |
| 7963 | break; |
| 7964 | |
| 7965 | case DW_MACINFO_vendor_ext: |
| 7966 | { |
| 7967 | int bytes_read; |
| 7968 | int constant; |
| 7969 | char *string; |
| 7970 | |
| 7971 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 7972 | mac_ptr += bytes_read; |
| 7973 | string = read_string (abfd, mac_ptr, &bytes_read); |
| 7974 | mac_ptr += bytes_read; |
| 7975 | |
| 7976 | /* We don't recognize any vendor extensions. */ |
| 7977 | } |
| 7978 | break; |
| 7979 | } |
| 7980 | } |
| 7981 | } |
| 7982 | |
| 7983 | /* Check if the attribute's form is a DW_FORM_block* |
| 7984 | if so return true else false. */ |
| 7985 | static int |
| 7986 | attr_form_is_block (struct attribute *attr) |
| 7987 | { |
| 7988 | return (attr == NULL ? 0 : |
| 7989 | attr->form == DW_FORM_block1 |
| 7990 | || attr->form == DW_FORM_block2 |
| 7991 | || attr->form == DW_FORM_block4 |
| 7992 | || attr->form == DW_FORM_block); |
| 7993 | } |
| 7994 | |
| 7995 | static void |
| 7996 | dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym, |
| 7997 | struct dwarf2_cu *cu) |
| 7998 | { |
| 7999 | if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8) |
| 8000 | { |
| 8001 | struct dwarf2_loclist_baton *baton; |
| 8002 | |
| 8003 | baton = obstack_alloc (&cu->objfile->objfile_obstack, |
| 8004 | sizeof (struct dwarf2_loclist_baton)); |
| 8005 | baton->objfile = cu->objfile; |
| 8006 | |
| 8007 | /* We don't know how long the location list is, but make sure we |
| 8008 | don't run off the edge of the section. */ |
| 8009 | baton->size = dwarf_loc_size - DW_UNSND (attr); |
| 8010 | baton->data = dwarf_loc_buffer + DW_UNSND (attr); |
| 8011 | baton->base_address = cu->header.base_address; |
| 8012 | if (cu->header.base_known == 0) |
| 8013 | complaint (&symfile_complaints, |
| 8014 | "Location list used without specifying the CU base address."); |
| 8015 | |
| 8016 | SYMBOL_OPS (sym) = &dwarf2_loclist_funcs; |
| 8017 | SYMBOL_LOCATION_BATON (sym) = baton; |
| 8018 | } |
| 8019 | else |
| 8020 | { |
| 8021 | struct dwarf2_locexpr_baton *baton; |
| 8022 | |
| 8023 | baton = obstack_alloc (&cu->objfile->objfile_obstack, |
| 8024 | sizeof (struct dwarf2_locexpr_baton)); |
| 8025 | baton->objfile = cu->objfile; |
| 8026 | |
| 8027 | if (attr_form_is_block (attr)) |
| 8028 | { |
| 8029 | /* Note that we're just copying the block's data pointer |
| 8030 | here, not the actual data. We're still pointing into the |
| 8031 | dwarf_info_buffer for SYM's objfile; right now we never |
| 8032 | release that buffer, but when we do clean up properly |
| 8033 | this may need to change. */ |
| 8034 | baton->size = DW_BLOCK (attr)->size; |
| 8035 | baton->data = DW_BLOCK (attr)->data; |
| 8036 | } |
| 8037 | else |
| 8038 | { |
| 8039 | dwarf2_invalid_attrib_class_complaint ("location description", |
| 8040 | SYMBOL_NATURAL_NAME (sym)); |
| 8041 | baton->size = 0; |
| 8042 | baton->data = NULL; |
| 8043 | } |
| 8044 | |
| 8045 | SYMBOL_OPS (sym) = &dwarf2_locexpr_funcs; |
| 8046 | SYMBOL_LOCATION_BATON (sym) = baton; |
| 8047 | } |
| 8048 | } |