| 1 | /* DWARF 2 debugging format support for GDB. |
| 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, |
| 6 | Inc. with support from Florida State University (under contract |
| 7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. |
| 8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., |
| 9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 |
| 10 | support in dwarfread.c |
| 11 | |
| 12 | This file is part of GDB. |
| 13 | |
| 14 | This program is free software; you can redistribute it and/or modify |
| 15 | it under the terms of the GNU General Public License as published by |
| 16 | the Free Software Foundation; either version 2 of the License, or (at |
| 17 | your option) any later version. |
| 18 | |
| 19 | This program is distributed in the hope that it will be useful, but |
| 20 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 22 | General Public License for more details. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program; if not, write to the Free Software |
| 26 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 27 | Boston, MA 02111-1307, USA. */ |
| 28 | |
| 29 | #include "defs.h" |
| 30 | #include "bfd.h" |
| 31 | #include "symtab.h" |
| 32 | #include "gdbtypes.h" |
| 33 | #include "symfile.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 | |
| 42 | #include "language.h" |
| 43 | #include "complaints.h" |
| 44 | #include "bcache.h" |
| 45 | #include <fcntl.h> |
| 46 | #include "gdb_string.h" |
| 47 | #include "gdb_assert.h" |
| 48 | #include <sys/types.h> |
| 49 | |
| 50 | #ifndef DWARF2_REG_TO_REGNUM |
| 51 | #define DWARF2_REG_TO_REGNUM(REG) (REG) |
| 52 | #endif |
| 53 | |
| 54 | #if 0 |
| 55 | /* .debug_info header for a compilation unit |
| 56 | Because of alignment constraints, this structure has padding and cannot |
| 57 | be mapped directly onto the beginning of the .debug_info section. */ |
| 58 | typedef struct comp_unit_header |
| 59 | { |
| 60 | unsigned int length; /* length of the .debug_info |
| 61 | contribution */ |
| 62 | unsigned short version; /* version number -- 2 for DWARF |
| 63 | version 2 */ |
| 64 | unsigned int abbrev_offset; /* offset into .debug_abbrev section */ |
| 65 | unsigned char addr_size; /* byte size of an address -- 4 */ |
| 66 | } |
| 67 | _COMP_UNIT_HEADER; |
| 68 | #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11 |
| 69 | #endif |
| 70 | |
| 71 | /* .debug_pubnames header |
| 72 | Because of alignment constraints, this structure has padding and cannot |
| 73 | be mapped directly onto the beginning of the .debug_info section. */ |
| 74 | typedef struct pubnames_header |
| 75 | { |
| 76 | unsigned int length; /* length of the .debug_pubnames |
| 77 | contribution */ |
| 78 | unsigned char version; /* version number -- 2 for DWARF |
| 79 | version 2 */ |
| 80 | unsigned int info_offset; /* offset into .debug_info section */ |
| 81 | unsigned int info_size; /* byte size of .debug_info section |
| 82 | portion */ |
| 83 | } |
| 84 | _PUBNAMES_HEADER; |
| 85 | #define _ACTUAL_PUBNAMES_HEADER_SIZE 13 |
| 86 | |
| 87 | /* .debug_pubnames header |
| 88 | Because of alignment constraints, this structure has padding and cannot |
| 89 | be mapped directly onto the beginning of the .debug_info section. */ |
| 90 | typedef struct aranges_header |
| 91 | { |
| 92 | unsigned int length; /* byte len of the .debug_aranges |
| 93 | contribution */ |
| 94 | unsigned short version; /* version number -- 2 for DWARF |
| 95 | version 2 */ |
| 96 | unsigned int info_offset; /* offset into .debug_info section */ |
| 97 | unsigned char addr_size; /* byte size of an address */ |
| 98 | unsigned char seg_size; /* byte size of segment descriptor */ |
| 99 | } |
| 100 | _ARANGES_HEADER; |
| 101 | #define _ACTUAL_ARANGES_HEADER_SIZE 12 |
| 102 | |
| 103 | /* .debug_line statement program prologue |
| 104 | Because of alignment constraints, this structure has padding and cannot |
| 105 | be mapped directly onto the beginning of the .debug_info section. */ |
| 106 | typedef struct statement_prologue |
| 107 | { |
| 108 | unsigned int total_length; /* byte length of the statement |
| 109 | information */ |
| 110 | unsigned short version; /* version number -- 2 for DWARF |
| 111 | version 2 */ |
| 112 | unsigned int prologue_length; /* # bytes between prologue & |
| 113 | stmt program */ |
| 114 | unsigned char minimum_instruction_length; /* byte size of |
| 115 | smallest instr */ |
| 116 | unsigned char default_is_stmt; /* initial value of is_stmt |
| 117 | register */ |
| 118 | char line_base; |
| 119 | unsigned char line_range; |
| 120 | unsigned char opcode_base; /* number assigned to first special |
| 121 | opcode */ |
| 122 | unsigned char *standard_opcode_lengths; |
| 123 | } |
| 124 | _STATEMENT_PROLOGUE; |
| 125 | |
| 126 | /* offsets and sizes of debugging sections */ |
| 127 | |
| 128 | static file_ptr dwarf_info_offset; |
| 129 | static file_ptr dwarf_abbrev_offset; |
| 130 | static file_ptr dwarf_line_offset; |
| 131 | static file_ptr dwarf_pubnames_offset; |
| 132 | static file_ptr dwarf_aranges_offset; |
| 133 | static file_ptr dwarf_loc_offset; |
| 134 | static file_ptr dwarf_macinfo_offset; |
| 135 | static file_ptr dwarf_str_offset; |
| 136 | file_ptr dwarf_frame_offset; |
| 137 | file_ptr dwarf_eh_frame_offset; |
| 138 | |
| 139 | static unsigned int dwarf_info_size; |
| 140 | static unsigned int dwarf_abbrev_size; |
| 141 | static unsigned int dwarf_line_size; |
| 142 | static unsigned int dwarf_pubnames_size; |
| 143 | static unsigned int dwarf_aranges_size; |
| 144 | static unsigned int dwarf_loc_size; |
| 145 | static unsigned int dwarf_macinfo_size; |
| 146 | static unsigned int dwarf_str_size; |
| 147 | unsigned int dwarf_frame_size; |
| 148 | unsigned int dwarf_eh_frame_size; |
| 149 | |
| 150 | /* names of the debugging sections */ |
| 151 | |
| 152 | #define INFO_SECTION ".debug_info" |
| 153 | #define ABBREV_SECTION ".debug_abbrev" |
| 154 | #define LINE_SECTION ".debug_line" |
| 155 | #define PUBNAMES_SECTION ".debug_pubnames" |
| 156 | #define ARANGES_SECTION ".debug_aranges" |
| 157 | #define LOC_SECTION ".debug_loc" |
| 158 | #define MACINFO_SECTION ".debug_macinfo" |
| 159 | #define STR_SECTION ".debug_str" |
| 160 | #define FRAME_SECTION ".debug_frame" |
| 161 | #define EH_FRAME_SECTION ".eh_frame" |
| 162 | |
| 163 | /* local data types */ |
| 164 | |
| 165 | /* The data in a compilation unit header, after target2host |
| 166 | translation, looks like this. */ |
| 167 | struct comp_unit_head |
| 168 | { |
| 169 | unsigned long length; |
| 170 | short version; |
| 171 | unsigned int abbrev_offset; |
| 172 | unsigned char addr_size; |
| 173 | unsigned char signed_addr_p; |
| 174 | unsigned int offset_size; /* size of file offsets; either 4 or 8 */ |
| 175 | unsigned int initial_length_size; /* size of the length field; either |
| 176 | 4 or 12 */ |
| 177 | }; |
| 178 | |
| 179 | /* The line number information for a compilation unit (found in the |
| 180 | .debug_line section) begins with a "statement program header", |
| 181 | which contains the following information. */ |
| 182 | struct line_header |
| 183 | { |
| 184 | unsigned int total_length; |
| 185 | unsigned short version; |
| 186 | unsigned int header_length; |
| 187 | unsigned char minimum_instruction_length; |
| 188 | unsigned char default_is_stmt; |
| 189 | int line_base; |
| 190 | unsigned char line_range; |
| 191 | unsigned char opcode_base; |
| 192 | |
| 193 | /* standard_opcode_lengths[i] is the number of operands for the |
| 194 | standard opcode whose value is i. This means that |
| 195 | standard_opcode_lengths[0] is unused, and the last meaningful |
| 196 | element is standard_opcode_lengths[opcode_base - 1]. */ |
| 197 | unsigned char *standard_opcode_lengths; |
| 198 | |
| 199 | /* The include_directories table. NOTE! These strings are not |
| 200 | allocated with xmalloc; instead, they are pointers into |
| 201 | debug_line_buffer. If you try to free them, `free' will get |
| 202 | indigestion. */ |
| 203 | unsigned int num_include_dirs, include_dirs_size; |
| 204 | char **include_dirs; |
| 205 | |
| 206 | /* The file_names table. NOTE! These strings are not allocated |
| 207 | with xmalloc; instead, they are pointers into debug_line_buffer. |
| 208 | Don't try to free them directly. */ |
| 209 | unsigned int num_file_names, file_names_size; |
| 210 | struct file_entry |
| 211 | { |
| 212 | char *name; |
| 213 | unsigned int dir_index; |
| 214 | unsigned int mod_time; |
| 215 | unsigned int length; |
| 216 | } *file_names; |
| 217 | |
| 218 | /* The start and end of the statement program following this |
| 219 | header. These point into dwarf_line_buffer. */ |
| 220 | char *statement_program_start, *statement_program_end; |
| 221 | }; |
| 222 | |
| 223 | /* When we construct a partial symbol table entry we only |
| 224 | need this much information. */ |
| 225 | struct partial_die_info |
| 226 | { |
| 227 | enum dwarf_tag tag; |
| 228 | unsigned char has_children; |
| 229 | unsigned char is_external; |
| 230 | unsigned char is_declaration; |
| 231 | unsigned char has_type; |
| 232 | unsigned int offset; |
| 233 | unsigned int abbrev; |
| 234 | char *name; |
| 235 | int has_pc_info; |
| 236 | CORE_ADDR lowpc; |
| 237 | CORE_ADDR highpc; |
| 238 | struct dwarf_block *locdesc; |
| 239 | unsigned int language; |
| 240 | char *sibling; |
| 241 | }; |
| 242 | |
| 243 | /* This data structure holds the information of an abbrev. */ |
| 244 | struct abbrev_info |
| 245 | { |
| 246 | unsigned int number; /* number identifying abbrev */ |
| 247 | enum dwarf_tag tag; /* dwarf tag */ |
| 248 | int has_children; /* boolean */ |
| 249 | unsigned int num_attrs; /* number of attributes */ |
| 250 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
| 251 | struct abbrev_info *next; /* next in chain */ |
| 252 | }; |
| 253 | |
| 254 | struct attr_abbrev |
| 255 | { |
| 256 | enum dwarf_attribute name; |
| 257 | enum dwarf_form form; |
| 258 | }; |
| 259 | |
| 260 | /* This data structure holds a complete die structure. */ |
| 261 | struct die_info |
| 262 | { |
| 263 | enum dwarf_tag tag; /* Tag indicating type of die */ |
| 264 | unsigned short has_children; /* Does the die have children */ |
| 265 | unsigned int abbrev; /* Abbrev number */ |
| 266 | unsigned int offset; /* Offset in .debug_info section */ |
| 267 | unsigned int num_attrs; /* Number of attributes */ |
| 268 | struct attribute *attrs; /* An array of attributes */ |
| 269 | struct die_info *next_ref; /* Next die in ref hash table */ |
| 270 | struct die_info *next; /* Next die in linked list */ |
| 271 | struct type *type; /* Cached type information */ |
| 272 | }; |
| 273 | |
| 274 | /* Attributes have a name and a value */ |
| 275 | struct attribute |
| 276 | { |
| 277 | enum dwarf_attribute name; |
| 278 | enum dwarf_form form; |
| 279 | union |
| 280 | { |
| 281 | char *str; |
| 282 | struct dwarf_block *blk; |
| 283 | unsigned long unsnd; |
| 284 | long int snd; |
| 285 | CORE_ADDR addr; |
| 286 | } |
| 287 | u; |
| 288 | }; |
| 289 | |
| 290 | struct function_range |
| 291 | { |
| 292 | const char *name; |
| 293 | CORE_ADDR lowpc, highpc; |
| 294 | int seen_line; |
| 295 | struct function_range *next; |
| 296 | }; |
| 297 | |
| 298 | static struct function_range *cu_first_fn, *cu_last_fn, *cu_cached_fn; |
| 299 | |
| 300 | /* Get at parts of an attribute structure */ |
| 301 | |
| 302 | #define DW_STRING(attr) ((attr)->u.str) |
| 303 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
| 304 | #define DW_BLOCK(attr) ((attr)->u.blk) |
| 305 | #define DW_SND(attr) ((attr)->u.snd) |
| 306 | #define DW_ADDR(attr) ((attr)->u.addr) |
| 307 | |
| 308 | /* Blocks are a bunch of untyped bytes. */ |
| 309 | struct dwarf_block |
| 310 | { |
| 311 | unsigned int size; |
| 312 | char *data; |
| 313 | }; |
| 314 | |
| 315 | /* We only hold one compilation unit's abbrevs in |
| 316 | memory at any one time. */ |
| 317 | #ifndef ABBREV_HASH_SIZE |
| 318 | #define ABBREV_HASH_SIZE 121 |
| 319 | #endif |
| 320 | #ifndef ATTR_ALLOC_CHUNK |
| 321 | #define ATTR_ALLOC_CHUNK 4 |
| 322 | #endif |
| 323 | |
| 324 | static struct abbrev_info *dwarf2_abbrevs[ABBREV_HASH_SIZE]; |
| 325 | |
| 326 | /* A hash table of die offsets for following references. */ |
| 327 | #ifndef REF_HASH_SIZE |
| 328 | #define REF_HASH_SIZE 1021 |
| 329 | #endif |
| 330 | |
| 331 | static struct die_info *die_ref_table[REF_HASH_SIZE]; |
| 332 | |
| 333 | /* Obstack for allocating temporary storage used during symbol reading. */ |
| 334 | static struct obstack dwarf2_tmp_obstack; |
| 335 | |
| 336 | /* Offset to the first byte of the current compilation unit header, |
| 337 | for resolving relative reference dies. */ |
| 338 | static unsigned int cu_header_offset; |
| 339 | |
| 340 | /* Allocate fields for structs, unions and enums in this size. */ |
| 341 | #ifndef DW_FIELD_ALLOC_CHUNK |
| 342 | #define DW_FIELD_ALLOC_CHUNK 4 |
| 343 | #endif |
| 344 | |
| 345 | /* The language we are debugging. */ |
| 346 | static enum language cu_language; |
| 347 | static const struct language_defn *cu_language_defn; |
| 348 | |
| 349 | /* Actually data from the sections. */ |
| 350 | static char *dwarf_info_buffer; |
| 351 | static char *dwarf_abbrev_buffer; |
| 352 | static char *dwarf_line_buffer; |
| 353 | static char *dwarf_str_buffer; |
| 354 | static char *dwarf_macinfo_buffer; |
| 355 | |
| 356 | /* A zeroed version of a partial die for initialization purposes. */ |
| 357 | static struct partial_die_info zeroed_partial_die; |
| 358 | |
| 359 | /* The generic symbol table building routines have separate lists for |
| 360 | file scope symbols and all all other scopes (local scopes). So |
| 361 | we need to select the right one to pass to add_symbol_to_list(). |
| 362 | We do it by keeping a pointer to the correct list in list_in_scope. |
| 363 | |
| 364 | FIXME: The original dwarf code just treated the file scope as the first |
| 365 | local scope, and all other local scopes as nested local scopes, and worked |
| 366 | fine. Check to see if we really need to distinguish these |
| 367 | in buildsym.c. */ |
| 368 | static struct pending **list_in_scope = &file_symbols; |
| 369 | |
| 370 | /* FIXME: decode_locdesc sets these variables to describe the location |
| 371 | to the caller. These ought to be a structure or something. If |
| 372 | none of the flags are set, the object lives at the address returned |
| 373 | by decode_locdesc. */ |
| 374 | |
| 375 | static int optimized_out; /* No ops in location in expression, |
| 376 | so object was optimized out. */ |
| 377 | static int isreg; /* Object lives in register. |
| 378 | decode_locdesc's return value is |
| 379 | the register number. */ |
| 380 | static int offreg; /* Object's address is the sum of the |
| 381 | register specified by basereg, plus |
| 382 | the offset returned. */ |
| 383 | static int basereg; /* See `offreg'. */ |
| 384 | static int isderef; /* Value described by flags above is |
| 385 | the address of a pointer to the object. */ |
| 386 | static int islocal; /* Variable is at the returned offset |
| 387 | from the frame start, but there's |
| 388 | no identified frame pointer for |
| 389 | this function, so we can't say |
| 390 | which register it's relative to; |
| 391 | use LOC_LOCAL. */ |
| 392 | |
| 393 | /* DW_AT_frame_base values for the current function. |
| 394 | frame_base_reg is -1 if DW_AT_frame_base is missing, otherwise it |
| 395 | contains the register number for the frame register. |
| 396 | frame_base_offset is the offset from the frame register to the |
| 397 | virtual stack frame. */ |
| 398 | static int frame_base_reg; |
| 399 | static CORE_ADDR frame_base_offset; |
| 400 | |
| 401 | /* This value is added to each symbol value. FIXME: Generalize to |
| 402 | the section_offsets structure used by dbxread (once this is done, |
| 403 | pass the appropriate section number to end_symtab). */ |
| 404 | static CORE_ADDR baseaddr; /* Add to each symbol value */ |
| 405 | |
| 406 | /* We put a pointer to this structure in the read_symtab_private field |
| 407 | of the psymtab. |
| 408 | The complete dwarf information for an objfile is kept in the |
| 409 | psymbol_obstack, so that absolute die references can be handled. |
| 410 | Most of the information in this structure is related to an entire |
| 411 | object file and could be passed via the sym_private field of the objfile. |
| 412 | It is however conceivable that dwarf2 might not be the only type |
| 413 | of symbols read from an object file. */ |
| 414 | |
| 415 | struct dwarf2_pinfo |
| 416 | { |
| 417 | /* Pointer to start of dwarf info buffer for the objfile. */ |
| 418 | |
| 419 | char *dwarf_info_buffer; |
| 420 | |
| 421 | /* Offset in dwarf_info_buffer for this compilation unit. */ |
| 422 | |
| 423 | unsigned long dwarf_info_offset; |
| 424 | |
| 425 | /* Pointer to start of dwarf abbreviation buffer for the objfile. */ |
| 426 | |
| 427 | char *dwarf_abbrev_buffer; |
| 428 | |
| 429 | /* Size of dwarf abbreviation section for the objfile. */ |
| 430 | |
| 431 | unsigned int dwarf_abbrev_size; |
| 432 | |
| 433 | /* Pointer to start of dwarf line buffer for the objfile. */ |
| 434 | |
| 435 | char *dwarf_line_buffer; |
| 436 | |
| 437 | /* Size of dwarf_line_buffer, in bytes. */ |
| 438 | |
| 439 | unsigned int dwarf_line_size; |
| 440 | |
| 441 | /* Pointer to start of dwarf string buffer for the objfile. */ |
| 442 | |
| 443 | char *dwarf_str_buffer; |
| 444 | |
| 445 | /* Size of dwarf string section for the objfile. */ |
| 446 | |
| 447 | unsigned int dwarf_str_size; |
| 448 | |
| 449 | /* Pointer to start of dwarf macro buffer for the objfile. */ |
| 450 | |
| 451 | char *dwarf_macinfo_buffer; |
| 452 | |
| 453 | /* Size of dwarf macinfo section for the objfile. */ |
| 454 | |
| 455 | unsigned int dwarf_macinfo_size; |
| 456 | |
| 457 | }; |
| 458 | |
| 459 | #define PST_PRIVATE(p) ((struct dwarf2_pinfo *)(p)->read_symtab_private) |
| 460 | #define DWARF_INFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_info_buffer) |
| 461 | #define DWARF_INFO_OFFSET(p) (PST_PRIVATE(p)->dwarf_info_offset) |
| 462 | #define DWARF_ABBREV_BUFFER(p) (PST_PRIVATE(p)->dwarf_abbrev_buffer) |
| 463 | #define DWARF_ABBREV_SIZE(p) (PST_PRIVATE(p)->dwarf_abbrev_size) |
| 464 | #define DWARF_LINE_BUFFER(p) (PST_PRIVATE(p)->dwarf_line_buffer) |
| 465 | #define DWARF_LINE_SIZE(p) (PST_PRIVATE(p)->dwarf_line_size) |
| 466 | #define DWARF_STR_BUFFER(p) (PST_PRIVATE(p)->dwarf_str_buffer) |
| 467 | #define DWARF_STR_SIZE(p) (PST_PRIVATE(p)->dwarf_str_size) |
| 468 | #define DWARF_MACINFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_macinfo_buffer) |
| 469 | #define DWARF_MACINFO_SIZE(p) (PST_PRIVATE(p)->dwarf_macinfo_size) |
| 470 | |
| 471 | /* Maintain an array of referenced fundamental types for the current |
| 472 | compilation unit being read. For DWARF version 1, we have to construct |
| 473 | the fundamental types on the fly, since no information about the |
| 474 | fundamental types is supplied. Each such fundamental type is created by |
| 475 | calling a language dependent routine to create the type, and then a |
| 476 | pointer to that type is then placed in the array at the index specified |
| 477 | by it's FT_<TYPENAME> value. The array has a fixed size set by the |
| 478 | FT_NUM_MEMBERS compile time constant, which is the number of predefined |
| 479 | fundamental types gdb knows how to construct. */ |
| 480 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ |
| 481 | |
| 482 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
| 483 | but this would require a corresponding change in unpack_field_as_long |
| 484 | and friends. */ |
| 485 | static int bits_per_byte = 8; |
| 486 | |
| 487 | /* The routines that read and process dies for a C struct or C++ class |
| 488 | pass lists of data member fields and lists of member function fields |
| 489 | in an instance of a field_info structure, as defined below. */ |
| 490 | struct field_info |
| 491 | { |
| 492 | /* List of data member and baseclasses fields. */ |
| 493 | struct nextfield |
| 494 | { |
| 495 | struct nextfield *next; |
| 496 | int accessibility; |
| 497 | int virtuality; |
| 498 | struct field field; |
| 499 | } |
| 500 | *fields; |
| 501 | |
| 502 | /* Number of fields. */ |
| 503 | int nfields; |
| 504 | |
| 505 | /* Number of baseclasses. */ |
| 506 | int nbaseclasses; |
| 507 | |
| 508 | /* Set if the accesibility of one of the fields is not public. */ |
| 509 | int non_public_fields; |
| 510 | |
| 511 | /* Member function fields array, entries are allocated in the order they |
| 512 | are encountered in the object file. */ |
| 513 | struct nextfnfield |
| 514 | { |
| 515 | struct nextfnfield *next; |
| 516 | struct fn_field fnfield; |
| 517 | } |
| 518 | *fnfields; |
| 519 | |
| 520 | /* Member function fieldlist array, contains name of possibly overloaded |
| 521 | member function, number of overloaded member functions and a pointer |
| 522 | to the head of the member function field chain. */ |
| 523 | struct fnfieldlist |
| 524 | { |
| 525 | char *name; |
| 526 | int length; |
| 527 | struct nextfnfield *head; |
| 528 | } |
| 529 | *fnfieldlists; |
| 530 | |
| 531 | /* Number of entries in the fnfieldlists array. */ |
| 532 | int nfnfields; |
| 533 | }; |
| 534 | |
| 535 | /* Various complaints about symbol reading that don't abort the process */ |
| 536 | |
| 537 | static struct complaint dwarf2_const_ignored = |
| 538 | { |
| 539 | "type qualifier 'const' ignored", 0, 0 |
| 540 | }; |
| 541 | static struct complaint dwarf2_volatile_ignored = |
| 542 | { |
| 543 | "type qualifier 'volatile' ignored", 0, 0 |
| 544 | }; |
| 545 | static struct complaint dwarf2_non_const_array_bound_ignored = |
| 546 | { |
| 547 | "non-constant array bounds form '%s' ignored", 0, 0 |
| 548 | }; |
| 549 | static struct complaint dwarf2_missing_line_number_section = |
| 550 | { |
| 551 | "missing .debug_line section", 0, 0 |
| 552 | }; |
| 553 | static struct complaint dwarf2_statement_list_fits_in_line_number_section = |
| 554 | { |
| 555 | "statement list doesn't fit in .debug_line section", 0, 0 |
| 556 | }; |
| 557 | static struct complaint dwarf2_mangled_line_number_section = |
| 558 | { |
| 559 | "mangled .debug_line section", 0, 0 |
| 560 | }; |
| 561 | static struct complaint dwarf2_unsupported_die_ref_attr = |
| 562 | { |
| 563 | "unsupported die ref attribute form: '%s'", 0, 0 |
| 564 | }; |
| 565 | static struct complaint dwarf2_unsupported_stack_op = |
| 566 | { |
| 567 | "unsupported stack op: '%s'", 0, 0 |
| 568 | }; |
| 569 | static struct complaint dwarf2_complex_location_expr = |
| 570 | { |
| 571 | "location expression too complex", 0, 0 |
| 572 | }; |
| 573 | static struct complaint dwarf2_unsupported_tag = |
| 574 | { |
| 575 | "unsupported tag: '%s'", 0, 0 |
| 576 | }; |
| 577 | static struct complaint dwarf2_unsupported_at_encoding = |
| 578 | { |
| 579 | "unsupported DW_AT_encoding: '%s'", 0, 0 |
| 580 | }; |
| 581 | static struct complaint dwarf2_unsupported_at_frame_base = |
| 582 | { |
| 583 | "unsupported DW_AT_frame_base for function '%s'", 0, 0 |
| 584 | }; |
| 585 | static struct complaint dwarf2_unexpected_tag = |
| 586 | { |
| 587 | "unexepected tag in read_type_die: '%s'", 0, 0 |
| 588 | }; |
| 589 | static struct complaint dwarf2_missing_at_frame_base = |
| 590 | { |
| 591 | "DW_AT_frame_base missing for DW_OP_fbreg", 0, 0 |
| 592 | }; |
| 593 | static struct complaint dwarf2_bad_static_member_name = |
| 594 | { |
| 595 | "unrecognized static data member name '%s'", 0, 0 |
| 596 | }; |
| 597 | static struct complaint dwarf2_unsupported_accessibility = |
| 598 | { |
| 599 | "unsupported accessibility %d", 0, 0 |
| 600 | }; |
| 601 | static struct complaint dwarf2_bad_member_name_complaint = |
| 602 | { |
| 603 | "cannot extract member name from '%s'", 0, 0 |
| 604 | }; |
| 605 | static struct complaint dwarf2_missing_member_fn_type_complaint = |
| 606 | { |
| 607 | "member function type missing for '%s'", 0, 0 |
| 608 | }; |
| 609 | static struct complaint dwarf2_vtbl_not_found_complaint = |
| 610 | { |
| 611 | "virtual function table pointer not found when defining class '%s'", 0, 0 |
| 612 | }; |
| 613 | static struct complaint dwarf2_absolute_sibling_complaint = |
| 614 | { |
| 615 | "ignoring absolute DW_AT_sibling", 0, 0 |
| 616 | }; |
| 617 | static struct complaint dwarf2_const_value_length_mismatch = |
| 618 | { |
| 619 | "const value length mismatch for '%s', got %d, expected %d", 0, 0 |
| 620 | }; |
| 621 | static struct complaint dwarf2_unsupported_const_value_attr = |
| 622 | { |
| 623 | "unsupported const value attribute form: '%s'", 0, 0 |
| 624 | }; |
| 625 | static struct complaint dwarf2_misplaced_line_number = |
| 626 | { |
| 627 | "misplaced first line number at 0x%lx for '%s'", 0, 0 |
| 628 | }; |
| 629 | static struct complaint dwarf2_line_header_too_long = |
| 630 | { |
| 631 | "line number info header doesn't fit in `.debug_line' section", 0, 0 |
| 632 | }; |
| 633 | static struct complaint dwarf2_missing_macinfo_section = |
| 634 | { |
| 635 | "missing .debug_macinfo section", 0, 0 |
| 636 | }; |
| 637 | static struct complaint dwarf2_macros_too_long = |
| 638 | { |
| 639 | "macro info runs off end of `.debug_macinfo' section", 0, 0 |
| 640 | }; |
| 641 | static struct complaint dwarf2_macros_not_terminated = |
| 642 | { |
| 643 | "no terminating 0-type entry for macros in `.debug_macinfo' section", 0, 0 |
| 644 | }; |
| 645 | static struct complaint dwarf2_macro_outside_file = |
| 646 | { |
| 647 | "debug info gives macro %s outside of any file: %s", 0, 0 |
| 648 | }; |
| 649 | static struct complaint dwarf2_macro_unmatched_end_file = |
| 650 | { |
| 651 | "macro debug info has an unmatched `close_file' directive", 0, 0 |
| 652 | }; |
| 653 | static struct complaint dwarf2_macro_malformed_definition = |
| 654 | { |
| 655 | "macro debug info contains a malformed macro definition:\n`%s'", 0, 0 |
| 656 | }; |
| 657 | static struct complaint dwarf2_macro_spaces_in_definition = |
| 658 | { |
| 659 | "macro definition contains spaces in formal argument list:\n`%s'", 0, 0 |
| 660 | }; |
| 661 | |
| 662 | /* local function prototypes */ |
| 663 | |
| 664 | static void dwarf2_locate_sections (bfd *, asection *, PTR); |
| 665 | |
| 666 | #if 0 |
| 667 | static void dwarf2_build_psymtabs_easy (struct objfile *, int); |
| 668 | #endif |
| 669 | |
| 670 | static void dwarf2_build_psymtabs_hard (struct objfile *, int); |
| 671 | |
| 672 | static char *scan_partial_symbols (char *, struct objfile *, |
| 673 | CORE_ADDR *, CORE_ADDR *, |
| 674 | const struct comp_unit_head *); |
| 675 | |
| 676 | static void add_partial_symbol (struct partial_die_info *, struct objfile *, |
| 677 | const struct comp_unit_head *); |
| 678 | |
| 679 | static void dwarf2_psymtab_to_symtab (struct partial_symtab *); |
| 680 | |
| 681 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
| 682 | |
| 683 | char *dwarf2_read_section (struct objfile *, file_ptr, unsigned int); |
| 684 | |
| 685 | static void dwarf2_read_abbrevs (bfd *, unsigned int); |
| 686 | |
| 687 | static void dwarf2_empty_abbrev_table (PTR); |
| 688 | |
| 689 | static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int); |
| 690 | |
| 691 | static char *read_partial_die (struct partial_die_info *, |
| 692 | bfd *, char *, |
| 693 | const struct comp_unit_head *); |
| 694 | |
| 695 | static char *read_full_die (struct die_info **, bfd *, char *, |
| 696 | const struct comp_unit_head *); |
| 697 | |
| 698 | static char *read_attribute (struct attribute *, struct attr_abbrev *, |
| 699 | bfd *, char *, const struct comp_unit_head *); |
| 700 | |
| 701 | static char *read_attribute_value (struct attribute *, unsigned, |
| 702 | bfd *, char *, const struct comp_unit_head *); |
| 703 | |
| 704 | static unsigned int read_1_byte (bfd *, char *); |
| 705 | |
| 706 | static int read_1_signed_byte (bfd *, char *); |
| 707 | |
| 708 | static unsigned int read_2_bytes (bfd *, char *); |
| 709 | |
| 710 | static unsigned int read_4_bytes (bfd *, char *); |
| 711 | |
| 712 | static unsigned long read_8_bytes (bfd *, char *); |
| 713 | |
| 714 | static CORE_ADDR read_address (bfd *, char *ptr, const struct comp_unit_head *, |
| 715 | int *bytes_read); |
| 716 | |
| 717 | static LONGEST read_initial_length (bfd *, char *, |
| 718 | struct comp_unit_head *, int *bytes_read); |
| 719 | |
| 720 | static LONGEST read_offset (bfd *, char *, const struct comp_unit_head *, |
| 721 | int *bytes_read); |
| 722 | |
| 723 | static char *read_n_bytes (bfd *, char *, unsigned int); |
| 724 | |
| 725 | static char *read_string (bfd *, char *, unsigned int *); |
| 726 | |
| 727 | static char *read_indirect_string (bfd *, char *, const struct comp_unit_head *, |
| 728 | unsigned int *); |
| 729 | |
| 730 | static unsigned long read_unsigned_leb128 (bfd *, char *, unsigned int *); |
| 731 | |
| 732 | static long read_signed_leb128 (bfd *, char *, unsigned int *); |
| 733 | |
| 734 | static void set_cu_language (unsigned int); |
| 735 | |
| 736 | static struct attribute *dwarf_attr (struct die_info *, unsigned int); |
| 737 | |
| 738 | static int die_is_declaration (struct die_info *); |
| 739 | |
| 740 | static void free_line_header (struct line_header *lh); |
| 741 | |
| 742 | static struct line_header *(dwarf_decode_line_header |
| 743 | (unsigned int offset, |
| 744 | bfd *abfd, |
| 745 | const struct comp_unit_head *cu_header)); |
| 746 | |
| 747 | static void dwarf_decode_lines (struct line_header *, char *, bfd *, |
| 748 | const struct comp_unit_head *); |
| 749 | |
| 750 | static void dwarf2_start_subfile (char *, char *); |
| 751 | |
| 752 | static struct symbol *new_symbol (struct die_info *, struct type *, |
| 753 | struct objfile *, const struct comp_unit_head *); |
| 754 | |
| 755 | static void dwarf2_const_value (struct attribute *, struct symbol *, |
| 756 | struct objfile *, const struct comp_unit_head *); |
| 757 | |
| 758 | static void dwarf2_const_value_data (struct attribute *attr, |
| 759 | struct symbol *sym, |
| 760 | int bits); |
| 761 | |
| 762 | static struct type *die_type (struct die_info *, struct objfile *, |
| 763 | const struct comp_unit_head *); |
| 764 | |
| 765 | static struct type *die_containing_type (struct die_info *, struct objfile *, |
| 766 | const struct comp_unit_head *); |
| 767 | |
| 768 | #if 0 |
| 769 | static struct type *type_at_offset (unsigned int, struct objfile *); |
| 770 | #endif |
| 771 | |
| 772 | static struct type *tag_type_to_type (struct die_info *, struct objfile *, |
| 773 | const struct comp_unit_head *); |
| 774 | |
| 775 | static void read_type_die (struct die_info *, struct objfile *, |
| 776 | const struct comp_unit_head *); |
| 777 | |
| 778 | static void read_typedef (struct die_info *, struct objfile *, |
| 779 | const struct comp_unit_head *); |
| 780 | |
| 781 | static void read_base_type (struct die_info *, struct objfile *); |
| 782 | |
| 783 | static void read_file_scope (struct die_info *, struct objfile *, |
| 784 | const struct comp_unit_head *); |
| 785 | |
| 786 | static void read_func_scope (struct die_info *, struct objfile *, |
| 787 | const struct comp_unit_head *); |
| 788 | |
| 789 | static void read_lexical_block_scope (struct die_info *, struct objfile *, |
| 790 | const struct comp_unit_head *); |
| 791 | |
| 792 | static int dwarf2_get_pc_bounds (struct die_info *, |
| 793 | CORE_ADDR *, CORE_ADDR *, struct objfile *); |
| 794 | |
| 795 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
| 796 | struct objfile *, const struct comp_unit_head *); |
| 797 | |
| 798 | static void dwarf2_attach_fields_to_type (struct field_info *, |
| 799 | struct type *, struct objfile *); |
| 800 | |
| 801 | static void dwarf2_add_member_fn (struct field_info *, |
| 802 | struct die_info *, struct type *, |
| 803 | struct objfile *objfile, |
| 804 | const struct comp_unit_head *); |
| 805 | |
| 806 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
| 807 | struct type *, struct objfile *); |
| 808 | |
| 809 | static void read_structure_scope (struct die_info *, struct objfile *, |
| 810 | const struct comp_unit_head *); |
| 811 | |
| 812 | static void read_common_block (struct die_info *, struct objfile *, |
| 813 | const struct comp_unit_head *); |
| 814 | |
| 815 | static void read_enumeration (struct die_info *, struct objfile *, |
| 816 | const struct comp_unit_head *); |
| 817 | |
| 818 | static struct type *dwarf_base_type (int, int, struct objfile *); |
| 819 | |
| 820 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct objfile *, |
| 821 | const struct comp_unit_head *); |
| 822 | |
| 823 | static void read_array_type (struct die_info *, struct objfile *, |
| 824 | const struct comp_unit_head *); |
| 825 | |
| 826 | static void read_tag_pointer_type (struct die_info *, struct objfile *, |
| 827 | const struct comp_unit_head *); |
| 828 | |
| 829 | static void read_tag_ptr_to_member_type (struct die_info *, struct objfile *, |
| 830 | const struct comp_unit_head *); |
| 831 | |
| 832 | static void read_tag_reference_type (struct die_info *, struct objfile *, |
| 833 | const struct comp_unit_head *); |
| 834 | |
| 835 | static void read_tag_const_type (struct die_info *, struct objfile *, |
| 836 | const struct comp_unit_head *); |
| 837 | |
| 838 | static void read_tag_volatile_type (struct die_info *, struct objfile *, |
| 839 | const struct comp_unit_head *); |
| 840 | |
| 841 | static void read_tag_string_type (struct die_info *, struct objfile *); |
| 842 | |
| 843 | static void read_subroutine_type (struct die_info *, struct objfile *, |
| 844 | const struct comp_unit_head *); |
| 845 | |
| 846 | static struct die_info *read_comp_unit (char *, bfd *, |
| 847 | const struct comp_unit_head *); |
| 848 | |
| 849 | static void free_die_list (struct die_info *); |
| 850 | |
| 851 | static struct cleanup *make_cleanup_free_die_list (struct die_info *); |
| 852 | |
| 853 | static void process_die (struct die_info *, struct objfile *, |
| 854 | const struct comp_unit_head *); |
| 855 | |
| 856 | static char *dwarf2_linkage_name (struct die_info *); |
| 857 | |
| 858 | static char *dwarf_tag_name (unsigned int); |
| 859 | |
| 860 | static char *dwarf_attr_name (unsigned int); |
| 861 | |
| 862 | static char *dwarf_form_name (unsigned int); |
| 863 | |
| 864 | static char *dwarf_stack_op_name (unsigned int); |
| 865 | |
| 866 | static char *dwarf_bool_name (unsigned int); |
| 867 | |
| 868 | static char *dwarf_type_encoding_name (unsigned int); |
| 869 | |
| 870 | #if 0 |
| 871 | static char *dwarf_cfi_name (unsigned int); |
| 872 | |
| 873 | struct die_info *copy_die (struct die_info *); |
| 874 | #endif |
| 875 | |
| 876 | static struct die_info *sibling_die (struct die_info *); |
| 877 | |
| 878 | static void dump_die (struct die_info *); |
| 879 | |
| 880 | static void dump_die_list (struct die_info *); |
| 881 | |
| 882 | static void store_in_ref_table (unsigned int, struct die_info *); |
| 883 | |
| 884 | static void dwarf2_empty_hash_tables (void); |
| 885 | |
| 886 | static unsigned int dwarf2_get_ref_die_offset (struct attribute *); |
| 887 | |
| 888 | static struct die_info *follow_die_ref (unsigned int); |
| 889 | |
| 890 | static struct type *dwarf2_fundamental_type (struct objfile *, int); |
| 891 | |
| 892 | /* memory allocation interface */ |
| 893 | |
| 894 | static void dwarf2_free_tmp_obstack (PTR); |
| 895 | |
| 896 | static struct dwarf_block *dwarf_alloc_block (void); |
| 897 | |
| 898 | static struct abbrev_info *dwarf_alloc_abbrev (void); |
| 899 | |
| 900 | static struct die_info *dwarf_alloc_die (void); |
| 901 | |
| 902 | static void initialize_cu_func_list (void); |
| 903 | |
| 904 | static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR); |
| 905 | |
| 906 | static void dwarf_decode_macros (struct line_header *, unsigned int, |
| 907 | char *, bfd *, const struct comp_unit_head *, |
| 908 | struct objfile *); |
| 909 | |
| 910 | /* Try to locate the sections we need for DWARF 2 debugging |
| 911 | information and return true if we have enough to do something. */ |
| 912 | |
| 913 | int |
| 914 | dwarf2_has_info (bfd *abfd) |
| 915 | { |
| 916 | dwarf_info_offset = 0; |
| 917 | dwarf_abbrev_offset = 0; |
| 918 | dwarf_line_offset = 0; |
| 919 | dwarf_str_offset = 0; |
| 920 | dwarf_macinfo_offset = 0; |
| 921 | dwarf_frame_offset = 0; |
| 922 | dwarf_eh_frame_offset = 0; |
| 923 | bfd_map_over_sections (abfd, dwarf2_locate_sections, NULL); |
| 924 | if (dwarf_info_offset && dwarf_abbrev_offset) |
| 925 | { |
| 926 | return 1; |
| 927 | } |
| 928 | else |
| 929 | { |
| 930 | return 0; |
| 931 | } |
| 932 | } |
| 933 | |
| 934 | /* This function is mapped across the sections and remembers the |
| 935 | offset and size of each of the debugging sections we are interested |
| 936 | in. */ |
| 937 | |
| 938 | static void |
| 939 | dwarf2_locate_sections (bfd *ignore_abfd, asection *sectp, PTR ignore_ptr) |
| 940 | { |
| 941 | if (STREQ (sectp->name, INFO_SECTION)) |
| 942 | { |
| 943 | dwarf_info_offset = sectp->filepos; |
| 944 | dwarf_info_size = bfd_get_section_size_before_reloc (sectp); |
| 945 | } |
| 946 | else if (STREQ (sectp->name, ABBREV_SECTION)) |
| 947 | { |
| 948 | dwarf_abbrev_offset = sectp->filepos; |
| 949 | dwarf_abbrev_size = bfd_get_section_size_before_reloc (sectp); |
| 950 | } |
| 951 | else if (STREQ (sectp->name, LINE_SECTION)) |
| 952 | { |
| 953 | dwarf_line_offset = sectp->filepos; |
| 954 | dwarf_line_size = bfd_get_section_size_before_reloc (sectp); |
| 955 | } |
| 956 | else if (STREQ (sectp->name, PUBNAMES_SECTION)) |
| 957 | { |
| 958 | dwarf_pubnames_offset = sectp->filepos; |
| 959 | dwarf_pubnames_size = bfd_get_section_size_before_reloc (sectp); |
| 960 | } |
| 961 | else if (STREQ (sectp->name, ARANGES_SECTION)) |
| 962 | { |
| 963 | dwarf_aranges_offset = sectp->filepos; |
| 964 | dwarf_aranges_size = bfd_get_section_size_before_reloc (sectp); |
| 965 | } |
| 966 | else if (STREQ (sectp->name, LOC_SECTION)) |
| 967 | { |
| 968 | dwarf_loc_offset = sectp->filepos; |
| 969 | dwarf_loc_size = bfd_get_section_size_before_reloc (sectp); |
| 970 | } |
| 971 | else if (STREQ (sectp->name, MACINFO_SECTION)) |
| 972 | { |
| 973 | dwarf_macinfo_offset = sectp->filepos; |
| 974 | dwarf_macinfo_size = bfd_get_section_size_before_reloc (sectp); |
| 975 | } |
| 976 | else if (STREQ (sectp->name, STR_SECTION)) |
| 977 | { |
| 978 | dwarf_str_offset = sectp->filepos; |
| 979 | dwarf_str_size = bfd_get_section_size_before_reloc (sectp); |
| 980 | } |
| 981 | else if (STREQ (sectp->name, FRAME_SECTION)) |
| 982 | { |
| 983 | dwarf_frame_offset = sectp->filepos; |
| 984 | dwarf_frame_size = bfd_get_section_size_before_reloc (sectp); |
| 985 | } |
| 986 | else if (STREQ (sectp->name, EH_FRAME_SECTION)) |
| 987 | { |
| 988 | dwarf_eh_frame_offset = sectp->filepos; |
| 989 | dwarf_eh_frame_size = bfd_get_section_size_before_reloc (sectp); |
| 990 | } |
| 991 | } |
| 992 | |
| 993 | /* Build a partial symbol table. */ |
| 994 | |
| 995 | void |
| 996 | dwarf2_build_psymtabs (struct objfile *objfile, int mainline) |
| 997 | { |
| 998 | |
| 999 | /* We definitely need the .debug_info and .debug_abbrev sections */ |
| 1000 | |
| 1001 | dwarf_info_buffer = dwarf2_read_section (objfile, |
| 1002 | dwarf_info_offset, |
| 1003 | dwarf_info_size); |
| 1004 | dwarf_abbrev_buffer = dwarf2_read_section (objfile, |
| 1005 | dwarf_abbrev_offset, |
| 1006 | dwarf_abbrev_size); |
| 1007 | dwarf_line_buffer = dwarf2_read_section (objfile, |
| 1008 | dwarf_line_offset, |
| 1009 | dwarf_line_size); |
| 1010 | |
| 1011 | if (dwarf_str_offset) |
| 1012 | dwarf_str_buffer = dwarf2_read_section (objfile, |
| 1013 | dwarf_str_offset, |
| 1014 | dwarf_str_size); |
| 1015 | else |
| 1016 | dwarf_str_buffer = NULL; |
| 1017 | |
| 1018 | if (dwarf_macinfo_offset) |
| 1019 | dwarf_macinfo_buffer = dwarf2_read_section (objfile, |
| 1020 | dwarf_macinfo_offset, |
| 1021 | dwarf_macinfo_size); |
| 1022 | else |
| 1023 | dwarf_macinfo_buffer = NULL; |
| 1024 | |
| 1025 | if (mainline |
| 1026 | || (objfile->global_psymbols.size == 0 |
| 1027 | && objfile->static_psymbols.size == 0)) |
| 1028 | { |
| 1029 | init_psymbol_list (objfile, 1024); |
| 1030 | } |
| 1031 | |
| 1032 | #if 0 |
| 1033 | if (dwarf_aranges_offset && dwarf_pubnames_offset) |
| 1034 | { |
| 1035 | /* Things are significantly easier if we have .debug_aranges and |
| 1036 | .debug_pubnames sections */ |
| 1037 | |
| 1038 | dwarf2_build_psymtabs_easy (objfile, mainline); |
| 1039 | } |
| 1040 | else |
| 1041 | #endif |
| 1042 | /* only test this case for now */ |
| 1043 | { |
| 1044 | /* In this case we have to work a bit harder */ |
| 1045 | dwarf2_build_psymtabs_hard (objfile, mainline); |
| 1046 | } |
| 1047 | } |
| 1048 | |
| 1049 | #if 0 |
| 1050 | /* Build the partial symbol table from the information in the |
| 1051 | .debug_pubnames and .debug_aranges sections. */ |
| 1052 | |
| 1053 | static void |
| 1054 | dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline) |
| 1055 | { |
| 1056 | bfd *abfd = objfile->obfd; |
| 1057 | char *aranges_buffer, *pubnames_buffer; |
| 1058 | char *aranges_ptr, *pubnames_ptr; |
| 1059 | unsigned int entry_length, version, info_offset, info_size; |
| 1060 | |
| 1061 | pubnames_buffer = dwarf2_read_section (objfile, |
| 1062 | dwarf_pubnames_offset, |
| 1063 | dwarf_pubnames_size); |
| 1064 | pubnames_ptr = pubnames_buffer; |
| 1065 | while ((pubnames_ptr - pubnames_buffer) < dwarf_pubnames_size) |
| 1066 | { |
| 1067 | struct comp_unit_head cu_header; |
| 1068 | int bytes_read; |
| 1069 | |
| 1070 | entry_length = read_initial_length (abfd, pubnames_ptr, &cu_header, |
| 1071 | &bytes_read); |
| 1072 | pubnames_ptr += bytes_read; |
| 1073 | version = read_1_byte (abfd, pubnames_ptr); |
| 1074 | pubnames_ptr += 1; |
| 1075 | info_offset = read_4_bytes (abfd, pubnames_ptr); |
| 1076 | pubnames_ptr += 4; |
| 1077 | info_size = read_4_bytes (abfd, pubnames_ptr); |
| 1078 | pubnames_ptr += 4; |
| 1079 | } |
| 1080 | |
| 1081 | aranges_buffer = dwarf2_read_section (objfile, |
| 1082 | dwarf_aranges_offset, |
| 1083 | dwarf_aranges_size); |
| 1084 | |
| 1085 | } |
| 1086 | #endif |
| 1087 | |
| 1088 | /* Read in the comp unit header information from the debug_info at |
| 1089 | info_ptr. */ |
| 1090 | |
| 1091 | static char * |
| 1092 | read_comp_unit_head (struct comp_unit_head *cu_header, |
| 1093 | char *info_ptr, bfd *abfd) |
| 1094 | { |
| 1095 | int signed_addr; |
| 1096 | int bytes_read; |
| 1097 | cu_header->length = read_initial_length (abfd, info_ptr, cu_header, |
| 1098 | &bytes_read); |
| 1099 | info_ptr += bytes_read; |
| 1100 | cu_header->version = read_2_bytes (abfd, info_ptr); |
| 1101 | info_ptr += 2; |
| 1102 | cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header, |
| 1103 | &bytes_read); |
| 1104 | info_ptr += bytes_read; |
| 1105 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
| 1106 | info_ptr += 1; |
| 1107 | signed_addr = bfd_get_sign_extend_vma (abfd); |
| 1108 | if (signed_addr < 0) |
| 1109 | internal_error (__FILE__, __LINE__, |
| 1110 | "read_comp_unit_head: dwarf from non elf file"); |
| 1111 | cu_header->signed_addr_p = signed_addr; |
| 1112 | return info_ptr; |
| 1113 | } |
| 1114 | |
| 1115 | /* Build the partial symbol table by doing a quick pass through the |
| 1116 | .debug_info and .debug_abbrev sections. */ |
| 1117 | |
| 1118 | static void |
| 1119 | dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline) |
| 1120 | { |
| 1121 | /* Instead of reading this into a big buffer, we should probably use |
| 1122 | mmap() on architectures that support it. (FIXME) */ |
| 1123 | bfd *abfd = objfile->obfd; |
| 1124 | char *info_ptr, *abbrev_ptr; |
| 1125 | char *beg_of_comp_unit; |
| 1126 | struct partial_die_info comp_unit_die; |
| 1127 | struct partial_symtab *pst; |
| 1128 | struct cleanup *back_to; |
| 1129 | CORE_ADDR lowpc, highpc; |
| 1130 | |
| 1131 | info_ptr = dwarf_info_buffer; |
| 1132 | abbrev_ptr = dwarf_abbrev_buffer; |
| 1133 | |
| 1134 | /* We use dwarf2_tmp_obstack for objects that don't need to survive |
| 1135 | the partial symbol scan, like attribute values. |
| 1136 | |
| 1137 | We could reduce our peak memory consumption during partial symbol |
| 1138 | table construction by freeing stuff from this obstack more often |
| 1139 | --- say, after processing each compilation unit, or each die --- |
| 1140 | but it turns out that this saves almost nothing. For an |
| 1141 | executable with 11Mb of Dwarf 2 data, I found about 64k allocated |
| 1142 | on dwarf2_tmp_obstack. Some investigation showed: |
| 1143 | |
| 1144 | 1) 69% of the attributes used forms DW_FORM_addr, DW_FORM_data*, |
| 1145 | DW_FORM_flag, DW_FORM_[su]data, and DW_FORM_ref*. These are |
| 1146 | all fixed-length values not requiring dynamic allocation. |
| 1147 | |
| 1148 | 2) 30% of the attributes used the form DW_FORM_string. For |
| 1149 | DW_FORM_string, read_attribute simply hands back a pointer to |
| 1150 | the null-terminated string in dwarf_info_buffer, so no dynamic |
| 1151 | allocation is needed there either. |
| 1152 | |
| 1153 | 3) The remaining 1% of the attributes all used DW_FORM_block1. |
| 1154 | 75% of those were DW_AT_frame_base location lists for |
| 1155 | functions; the rest were DW_AT_location attributes, probably |
| 1156 | for the global variables. |
| 1157 | |
| 1158 | Anyway, what this all means is that the memory the dwarf2 |
| 1159 | reader uses as temporary space reading partial symbols is about |
| 1160 | 0.5% as much as we use for dwarf_*_buffer. That's noise. */ |
| 1161 | |
| 1162 | obstack_init (&dwarf2_tmp_obstack); |
| 1163 | back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL); |
| 1164 | |
| 1165 | /* Since the objects we're extracting from dwarf_info_buffer vary in |
| 1166 | length, only the individual functions to extract them (like |
| 1167 | read_comp_unit_head and read_partial_die) can really know whether |
| 1168 | the buffer is large enough to hold another complete object. |
| 1169 | |
| 1170 | At the moment, they don't actually check that. If |
| 1171 | dwarf_info_buffer holds just one extra byte after the last |
| 1172 | compilation unit's dies, then read_comp_unit_head will happily |
| 1173 | read off the end of the buffer. read_partial_die is similarly |
| 1174 | casual. Those functions should be fixed. |
| 1175 | |
| 1176 | For this loop condition, simply checking whether there's any data |
| 1177 | left at all should be sufficient. */ |
| 1178 | while (info_ptr < dwarf_info_buffer + dwarf_info_size) |
| 1179 | { |
| 1180 | struct comp_unit_head cu_header; |
| 1181 | beg_of_comp_unit = info_ptr; |
| 1182 | info_ptr = read_comp_unit_head (&cu_header, info_ptr, abfd); |
| 1183 | |
| 1184 | if (cu_header.version != 2) |
| 1185 | { |
| 1186 | error ("Dwarf Error: wrong version in compilation unit header."); |
| 1187 | return; |
| 1188 | } |
| 1189 | if (cu_header.abbrev_offset >= dwarf_abbrev_size) |
| 1190 | { |
| 1191 | error ("Dwarf Error: bad offset (0x%lx) in compilation unit header (offset 0x%lx + 6).", |
| 1192 | (long) cu_header.abbrev_offset, |
| 1193 | (long) (beg_of_comp_unit - dwarf_info_buffer)); |
| 1194 | return; |
| 1195 | } |
| 1196 | if (beg_of_comp_unit + cu_header.length + cu_header.initial_length_size |
| 1197 | > dwarf_info_buffer + dwarf_info_size) |
| 1198 | { |
| 1199 | error ("Dwarf Error: bad length (0x%lx) in compilation unit header (offset 0x%lx + 0).", |
| 1200 | (long) cu_header.length, |
| 1201 | (long) (beg_of_comp_unit - dwarf_info_buffer)); |
| 1202 | return; |
| 1203 | } |
| 1204 | /* Read the abbrevs for this compilation unit into a table */ |
| 1205 | dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset); |
| 1206 | make_cleanup (dwarf2_empty_abbrev_table, NULL); |
| 1207 | |
| 1208 | /* Read the compilation unit die */ |
| 1209 | info_ptr = read_partial_die (&comp_unit_die, abfd, info_ptr, |
| 1210 | &cu_header); |
| 1211 | |
| 1212 | /* Set the language we're debugging */ |
| 1213 | set_cu_language (comp_unit_die.language); |
| 1214 | |
| 1215 | /* Allocate a new partial symbol table structure */ |
| 1216 | pst = start_psymtab_common (objfile, objfile->section_offsets, |
| 1217 | comp_unit_die.name ? comp_unit_die.name : "", |
| 1218 | comp_unit_die.lowpc, |
| 1219 | objfile->global_psymbols.next, |
| 1220 | objfile->static_psymbols.next); |
| 1221 | |
| 1222 | pst->read_symtab_private = (char *) |
| 1223 | obstack_alloc (&objfile->psymbol_obstack, sizeof (struct dwarf2_pinfo)); |
| 1224 | cu_header_offset = beg_of_comp_unit - dwarf_info_buffer; |
| 1225 | DWARF_INFO_BUFFER (pst) = dwarf_info_buffer; |
| 1226 | DWARF_INFO_OFFSET (pst) = beg_of_comp_unit - dwarf_info_buffer; |
| 1227 | DWARF_ABBREV_BUFFER (pst) = dwarf_abbrev_buffer; |
| 1228 | DWARF_ABBREV_SIZE (pst) = dwarf_abbrev_size; |
| 1229 | DWARF_LINE_BUFFER (pst) = dwarf_line_buffer; |
| 1230 | DWARF_LINE_SIZE (pst) = dwarf_line_size; |
| 1231 | DWARF_STR_BUFFER (pst) = dwarf_str_buffer; |
| 1232 | DWARF_STR_SIZE (pst) = dwarf_str_size; |
| 1233 | DWARF_MACINFO_BUFFER (pst) = dwarf_macinfo_buffer; |
| 1234 | DWARF_MACINFO_SIZE (pst) = dwarf_macinfo_size; |
| 1235 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 1236 | |
| 1237 | /* Store the function that reads in the rest of the symbol table */ |
| 1238 | pst->read_symtab = dwarf2_psymtab_to_symtab; |
| 1239 | |
| 1240 | /* Check if comp unit has_children. |
| 1241 | If so, read the rest of the partial symbols from this comp unit. |
| 1242 | If not, there's no more debug_info for this comp unit. */ |
| 1243 | if (comp_unit_die.has_children) |
| 1244 | { |
| 1245 | info_ptr = scan_partial_symbols (info_ptr, objfile, &lowpc, &highpc, |
| 1246 | &cu_header); |
| 1247 | |
| 1248 | /* If the compilation unit didn't have an explicit address range, |
| 1249 | then use the information extracted from its child dies. */ |
| 1250 | if (! comp_unit_die.has_pc_info) |
| 1251 | { |
| 1252 | comp_unit_die.lowpc = lowpc; |
| 1253 | comp_unit_die.highpc = highpc; |
| 1254 | } |
| 1255 | } |
| 1256 | pst->textlow = comp_unit_die.lowpc + baseaddr; |
| 1257 | pst->texthigh = comp_unit_die.highpc + baseaddr; |
| 1258 | |
| 1259 | pst->n_global_syms = objfile->global_psymbols.next - |
| 1260 | (objfile->global_psymbols.list + pst->globals_offset); |
| 1261 | pst->n_static_syms = objfile->static_psymbols.next - |
| 1262 | (objfile->static_psymbols.list + pst->statics_offset); |
| 1263 | sort_pst_symbols (pst); |
| 1264 | |
| 1265 | /* If there is already a psymtab or symtab for a file of this |
| 1266 | name, remove it. (If there is a symtab, more drastic things |
| 1267 | also happen.) This happens in VxWorks. */ |
| 1268 | free_named_symtabs (pst->filename); |
| 1269 | |
| 1270 | info_ptr = beg_of_comp_unit + cu_header.length |
| 1271 | + cu_header.initial_length_size; |
| 1272 | } |
| 1273 | do_cleanups (back_to); |
| 1274 | } |
| 1275 | |
| 1276 | /* Read in all interesting dies to the end of the compilation unit. */ |
| 1277 | |
| 1278 | static char * |
| 1279 | scan_partial_symbols (char *info_ptr, struct objfile *objfile, |
| 1280 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 1281 | const struct comp_unit_head *cu_header) |
| 1282 | { |
| 1283 | bfd *abfd = objfile->obfd; |
| 1284 | struct partial_die_info pdi; |
| 1285 | |
| 1286 | /* This function is called after we've read in the comp_unit_die in |
| 1287 | order to read its children. We start the nesting level at 1 since |
| 1288 | we have pushed 1 level down in order to read the comp unit's children. |
| 1289 | The comp unit itself is at level 0, so we stop reading when we pop |
| 1290 | back to that level. */ |
| 1291 | |
| 1292 | int nesting_level = 1; |
| 1293 | |
| 1294 | *lowpc = ((CORE_ADDR) -1); |
| 1295 | *highpc = ((CORE_ADDR) 0); |
| 1296 | |
| 1297 | while (nesting_level) |
| 1298 | { |
| 1299 | info_ptr = read_partial_die (&pdi, abfd, info_ptr, cu_header); |
| 1300 | |
| 1301 | if (pdi.name) |
| 1302 | { |
| 1303 | switch (pdi.tag) |
| 1304 | { |
| 1305 | case DW_TAG_subprogram: |
| 1306 | if (pdi.has_pc_info) |
| 1307 | { |
| 1308 | if (pdi.lowpc < *lowpc) |
| 1309 | { |
| 1310 | *lowpc = pdi.lowpc; |
| 1311 | } |
| 1312 | if (pdi.highpc > *highpc) |
| 1313 | { |
| 1314 | *highpc = pdi.highpc; |
| 1315 | } |
| 1316 | if ((pdi.is_external || nesting_level == 1) |
| 1317 | && !pdi.is_declaration) |
| 1318 | { |
| 1319 | add_partial_symbol (&pdi, objfile, cu_header); |
| 1320 | } |
| 1321 | } |
| 1322 | break; |
| 1323 | case DW_TAG_variable: |
| 1324 | case DW_TAG_typedef: |
| 1325 | case DW_TAG_class_type: |
| 1326 | case DW_TAG_structure_type: |
| 1327 | case DW_TAG_union_type: |
| 1328 | case DW_TAG_enumeration_type: |
| 1329 | if ((pdi.is_external || nesting_level == 1) |
| 1330 | && !pdi.is_declaration) |
| 1331 | { |
| 1332 | add_partial_symbol (&pdi, objfile, cu_header); |
| 1333 | } |
| 1334 | break; |
| 1335 | case DW_TAG_enumerator: |
| 1336 | /* File scope enumerators are added to the partial symbol |
| 1337 | table. */ |
| 1338 | if (nesting_level == 2) |
| 1339 | add_partial_symbol (&pdi, objfile, cu_header); |
| 1340 | break; |
| 1341 | case DW_TAG_base_type: |
| 1342 | /* File scope base type definitions are added to the partial |
| 1343 | symbol table. */ |
| 1344 | if (nesting_level == 1) |
| 1345 | add_partial_symbol (&pdi, objfile, cu_header); |
| 1346 | break; |
| 1347 | default: |
| 1348 | break; |
| 1349 | } |
| 1350 | } |
| 1351 | |
| 1352 | /* If the die has a sibling, skip to the sibling. |
| 1353 | Do not skip enumeration types, we want to record their |
| 1354 | enumerators. */ |
| 1355 | if (pdi.sibling && pdi.tag != DW_TAG_enumeration_type) |
| 1356 | { |
| 1357 | info_ptr = pdi.sibling; |
| 1358 | } |
| 1359 | else if (pdi.has_children) |
| 1360 | { |
| 1361 | /* Die has children, but the optional DW_AT_sibling attribute |
| 1362 | is missing. */ |
| 1363 | nesting_level++; |
| 1364 | } |
| 1365 | |
| 1366 | if (pdi.tag == 0) |
| 1367 | { |
| 1368 | nesting_level--; |
| 1369 | } |
| 1370 | } |
| 1371 | |
| 1372 | /* If we didn't find a lowpc, set it to highpc to avoid complaints |
| 1373 | from `maint check'. */ |
| 1374 | if (*lowpc == ((CORE_ADDR) -1)) |
| 1375 | *lowpc = *highpc; |
| 1376 | return info_ptr; |
| 1377 | } |
| 1378 | |
| 1379 | static void |
| 1380 | add_partial_symbol (struct partial_die_info *pdi, struct objfile *objfile, |
| 1381 | const struct comp_unit_head *cu_header) |
| 1382 | { |
| 1383 | CORE_ADDR addr = 0; |
| 1384 | |
| 1385 | switch (pdi->tag) |
| 1386 | { |
| 1387 | case DW_TAG_subprogram: |
| 1388 | if (pdi->is_external) |
| 1389 | { |
| 1390 | /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr, |
| 1391 | mst_text, objfile); */ |
| 1392 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1393 | VAR_NAMESPACE, LOC_BLOCK, |
| 1394 | &objfile->global_psymbols, |
| 1395 | 0, pdi->lowpc + baseaddr, cu_language, objfile); |
| 1396 | } |
| 1397 | else |
| 1398 | { |
| 1399 | /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr, |
| 1400 | mst_file_text, objfile); */ |
| 1401 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1402 | VAR_NAMESPACE, LOC_BLOCK, |
| 1403 | &objfile->static_psymbols, |
| 1404 | 0, pdi->lowpc + baseaddr, cu_language, objfile); |
| 1405 | } |
| 1406 | break; |
| 1407 | case DW_TAG_variable: |
| 1408 | if (pdi->is_external) |
| 1409 | { |
| 1410 | /* Global Variable. |
| 1411 | Don't enter into the minimal symbol tables as there is |
| 1412 | a minimal symbol table entry from the ELF symbols already. |
| 1413 | Enter into partial symbol table if it has a location |
| 1414 | descriptor or a type. |
| 1415 | If the location descriptor is missing, new_symbol will create |
| 1416 | a LOC_UNRESOLVED symbol, the address of the variable will then |
| 1417 | be determined from the minimal symbol table whenever the variable |
| 1418 | is referenced. |
| 1419 | The address for the partial symbol table entry is not |
| 1420 | used by GDB, but it comes in handy for debugging partial symbol |
| 1421 | table building. */ |
| 1422 | |
| 1423 | if (pdi->locdesc) |
| 1424 | addr = decode_locdesc (pdi->locdesc, objfile, cu_header); |
| 1425 | if (pdi->locdesc || pdi->has_type) |
| 1426 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1427 | VAR_NAMESPACE, LOC_STATIC, |
| 1428 | &objfile->global_psymbols, |
| 1429 | 0, addr + baseaddr, cu_language, objfile); |
| 1430 | } |
| 1431 | else |
| 1432 | { |
| 1433 | /* Static Variable. Skip symbols without location descriptors. */ |
| 1434 | if (pdi->locdesc == NULL) |
| 1435 | return; |
| 1436 | addr = decode_locdesc (pdi->locdesc, objfile, cu_header); |
| 1437 | /*prim_record_minimal_symbol (pdi->name, addr + baseaddr, |
| 1438 | mst_file_data, objfile); */ |
| 1439 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1440 | VAR_NAMESPACE, LOC_STATIC, |
| 1441 | &objfile->static_psymbols, |
| 1442 | 0, addr + baseaddr, cu_language, objfile); |
| 1443 | } |
| 1444 | break; |
| 1445 | case DW_TAG_typedef: |
| 1446 | case DW_TAG_base_type: |
| 1447 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1448 | VAR_NAMESPACE, LOC_TYPEDEF, |
| 1449 | &objfile->static_psymbols, |
| 1450 | 0, (CORE_ADDR) 0, cu_language, objfile); |
| 1451 | break; |
| 1452 | case DW_TAG_class_type: |
| 1453 | case DW_TAG_structure_type: |
| 1454 | case DW_TAG_union_type: |
| 1455 | case DW_TAG_enumeration_type: |
| 1456 | /* Skip aggregate types without children, these are external |
| 1457 | references. */ |
| 1458 | if (pdi->has_children == 0) |
| 1459 | return; |
| 1460 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1461 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
| 1462 | &objfile->static_psymbols, |
| 1463 | 0, (CORE_ADDR) 0, cu_language, objfile); |
| 1464 | |
| 1465 | if (cu_language == language_cplus) |
| 1466 | { |
| 1467 | /* For C++, these implicitly act as typedefs as well. */ |
| 1468 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1469 | VAR_NAMESPACE, LOC_TYPEDEF, |
| 1470 | &objfile->static_psymbols, |
| 1471 | 0, (CORE_ADDR) 0, cu_language, objfile); |
| 1472 | } |
| 1473 | break; |
| 1474 | case DW_TAG_enumerator: |
| 1475 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1476 | VAR_NAMESPACE, LOC_CONST, |
| 1477 | &objfile->static_psymbols, |
| 1478 | 0, (CORE_ADDR) 0, cu_language, objfile); |
| 1479 | break; |
| 1480 | default: |
| 1481 | break; |
| 1482 | } |
| 1483 | } |
| 1484 | |
| 1485 | /* Expand this partial symbol table into a full symbol table. */ |
| 1486 | |
| 1487 | static void |
| 1488 | dwarf2_psymtab_to_symtab (struct partial_symtab *pst) |
| 1489 | { |
| 1490 | /* FIXME: This is barely more than a stub. */ |
| 1491 | if (pst != NULL) |
| 1492 | { |
| 1493 | if (pst->readin) |
| 1494 | { |
| 1495 | warning ("bug: psymtab for %s is already read in.", pst->filename); |
| 1496 | } |
| 1497 | else |
| 1498 | { |
| 1499 | if (info_verbose) |
| 1500 | { |
| 1501 | printf_filtered ("Reading in symbols for %s...", pst->filename); |
| 1502 | gdb_flush (gdb_stdout); |
| 1503 | } |
| 1504 | |
| 1505 | psymtab_to_symtab_1 (pst); |
| 1506 | |
| 1507 | /* Finish up the debug error message. */ |
| 1508 | if (info_verbose) |
| 1509 | printf_filtered ("done.\n"); |
| 1510 | } |
| 1511 | } |
| 1512 | } |
| 1513 | |
| 1514 | static void |
| 1515 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
| 1516 | { |
| 1517 | struct objfile *objfile = pst->objfile; |
| 1518 | bfd *abfd = objfile->obfd; |
| 1519 | struct comp_unit_head cu_header; |
| 1520 | struct die_info *dies; |
| 1521 | unsigned long offset; |
| 1522 | CORE_ADDR lowpc, highpc; |
| 1523 | struct die_info *child_die; |
| 1524 | char *info_ptr; |
| 1525 | struct symtab *symtab; |
| 1526 | struct cleanup *back_to; |
| 1527 | |
| 1528 | /* Set local variables from the partial symbol table info. */ |
| 1529 | offset = DWARF_INFO_OFFSET (pst); |
| 1530 | dwarf_info_buffer = DWARF_INFO_BUFFER (pst); |
| 1531 | dwarf_abbrev_buffer = DWARF_ABBREV_BUFFER (pst); |
| 1532 | dwarf_abbrev_size = DWARF_ABBREV_SIZE (pst); |
| 1533 | dwarf_line_buffer = DWARF_LINE_BUFFER (pst); |
| 1534 | dwarf_line_size = DWARF_LINE_SIZE (pst); |
| 1535 | dwarf_str_buffer = DWARF_STR_BUFFER (pst); |
| 1536 | dwarf_str_size = DWARF_STR_SIZE (pst); |
| 1537 | dwarf_macinfo_buffer = DWARF_MACINFO_BUFFER (pst); |
| 1538 | dwarf_macinfo_size = DWARF_MACINFO_SIZE (pst); |
| 1539 | baseaddr = ANOFFSET (pst->section_offsets, SECT_OFF_TEXT (objfile)); |
| 1540 | cu_header_offset = offset; |
| 1541 | info_ptr = dwarf_info_buffer + offset; |
| 1542 | |
| 1543 | obstack_init (&dwarf2_tmp_obstack); |
| 1544 | back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL); |
| 1545 | |
| 1546 | buildsym_init (); |
| 1547 | make_cleanup (really_free_pendings, NULL); |
| 1548 | |
| 1549 | /* read in the comp_unit header */ |
| 1550 | info_ptr = read_comp_unit_head (&cu_header, info_ptr, abfd); |
| 1551 | |
| 1552 | /* Read the abbrevs for this compilation unit */ |
| 1553 | dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset); |
| 1554 | make_cleanup (dwarf2_empty_abbrev_table, NULL); |
| 1555 | |
| 1556 | dies = read_comp_unit (info_ptr, abfd, &cu_header); |
| 1557 | |
| 1558 | make_cleanup_free_die_list (dies); |
| 1559 | |
| 1560 | /* Do line number decoding in read_file_scope () */ |
| 1561 | process_die (dies, objfile, &cu_header); |
| 1562 | |
| 1563 | if (!dwarf2_get_pc_bounds (dies, &lowpc, &highpc, objfile)) |
| 1564 | { |
| 1565 | /* Some compilers don't define a DW_AT_high_pc attribute for |
| 1566 | the compilation unit. If the DW_AT_high_pc is missing, |
| 1567 | synthesize it, by scanning the DIE's below the compilation unit. */ |
| 1568 | highpc = 0; |
| 1569 | if (dies->has_children) |
| 1570 | { |
| 1571 | child_die = dies->next; |
| 1572 | while (child_die && child_die->tag) |
| 1573 | { |
| 1574 | if (child_die->tag == DW_TAG_subprogram) |
| 1575 | { |
| 1576 | CORE_ADDR low, high; |
| 1577 | |
| 1578 | if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile)) |
| 1579 | { |
| 1580 | highpc = max (highpc, high); |
| 1581 | } |
| 1582 | } |
| 1583 | child_die = sibling_die (child_die); |
| 1584 | } |
| 1585 | } |
| 1586 | } |
| 1587 | symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile)); |
| 1588 | |
| 1589 | /* Set symtab language to language from DW_AT_language. |
| 1590 | If the compilation is from a C file generated by language preprocessors, |
| 1591 | do not set the language if it was already deduced by start_subfile. */ |
| 1592 | if (symtab != NULL |
| 1593 | && !(cu_language == language_c && symtab->language != language_c)) |
| 1594 | { |
| 1595 | symtab->language = cu_language; |
| 1596 | } |
| 1597 | pst->symtab = symtab; |
| 1598 | pst->readin = 1; |
| 1599 | sort_symtab_syms (pst->symtab); |
| 1600 | |
| 1601 | do_cleanups (back_to); |
| 1602 | } |
| 1603 | |
| 1604 | /* Process a die and its children. */ |
| 1605 | |
| 1606 | static void |
| 1607 | process_die (struct die_info *die, struct objfile *objfile, |
| 1608 | const struct comp_unit_head *cu_header) |
| 1609 | { |
| 1610 | switch (die->tag) |
| 1611 | { |
| 1612 | case DW_TAG_padding: |
| 1613 | break; |
| 1614 | case DW_TAG_compile_unit: |
| 1615 | read_file_scope (die, objfile, cu_header); |
| 1616 | break; |
| 1617 | case DW_TAG_subprogram: |
| 1618 | read_subroutine_type (die, objfile, cu_header); |
| 1619 | read_func_scope (die, objfile, cu_header); |
| 1620 | break; |
| 1621 | case DW_TAG_inlined_subroutine: |
| 1622 | /* FIXME: These are ignored for now. |
| 1623 | They could be used to set breakpoints on all inlined instances |
| 1624 | of a function and make GDB `next' properly over inlined functions. */ |
| 1625 | break; |
| 1626 | case DW_TAG_lexical_block: |
| 1627 | read_lexical_block_scope (die, objfile, cu_header); |
| 1628 | break; |
| 1629 | case DW_TAG_class_type: |
| 1630 | case DW_TAG_structure_type: |
| 1631 | case DW_TAG_union_type: |
| 1632 | read_structure_scope (die, objfile, cu_header); |
| 1633 | break; |
| 1634 | case DW_TAG_enumeration_type: |
| 1635 | read_enumeration (die, objfile, cu_header); |
| 1636 | break; |
| 1637 | case DW_TAG_subroutine_type: |
| 1638 | read_subroutine_type (die, objfile, cu_header); |
| 1639 | break; |
| 1640 | case DW_TAG_array_type: |
| 1641 | read_array_type (die, objfile, cu_header); |
| 1642 | break; |
| 1643 | case DW_TAG_pointer_type: |
| 1644 | read_tag_pointer_type (die, objfile, cu_header); |
| 1645 | break; |
| 1646 | case DW_TAG_ptr_to_member_type: |
| 1647 | read_tag_ptr_to_member_type (die, objfile, cu_header); |
| 1648 | break; |
| 1649 | case DW_TAG_reference_type: |
| 1650 | read_tag_reference_type (die, objfile, cu_header); |
| 1651 | break; |
| 1652 | case DW_TAG_string_type: |
| 1653 | read_tag_string_type (die, objfile); |
| 1654 | break; |
| 1655 | case DW_TAG_base_type: |
| 1656 | read_base_type (die, objfile); |
| 1657 | if (dwarf_attr (die, DW_AT_name)) |
| 1658 | { |
| 1659 | /* Add a typedef symbol for the base type definition. */ |
| 1660 | new_symbol (die, die->type, objfile, cu_header); |
| 1661 | } |
| 1662 | break; |
| 1663 | case DW_TAG_common_block: |
| 1664 | read_common_block (die, objfile, cu_header); |
| 1665 | break; |
| 1666 | case DW_TAG_common_inclusion: |
| 1667 | break; |
| 1668 | default: |
| 1669 | new_symbol (die, NULL, objfile, cu_header); |
| 1670 | break; |
| 1671 | } |
| 1672 | } |
| 1673 | |
| 1674 | static void |
| 1675 | initialize_cu_func_list (void) |
| 1676 | { |
| 1677 | cu_first_fn = cu_last_fn = cu_cached_fn = NULL; |
| 1678 | } |
| 1679 | |
| 1680 | static void |
| 1681 | read_file_scope (struct die_info *die, struct objfile *objfile, |
| 1682 | const struct comp_unit_head *cu_header) |
| 1683 | { |
| 1684 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
| 1685 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
| 1686 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
| 1687 | struct attribute *attr; |
| 1688 | char *name = "<unknown>"; |
| 1689 | char *comp_dir = NULL; |
| 1690 | struct die_info *child_die; |
| 1691 | bfd *abfd = objfile->obfd; |
| 1692 | struct line_header *line_header = 0; |
| 1693 | |
| 1694 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile)) |
| 1695 | { |
| 1696 | if (die->has_children) |
| 1697 | { |
| 1698 | child_die = die->next; |
| 1699 | while (child_die && child_die->tag) |
| 1700 | { |
| 1701 | if (child_die->tag == DW_TAG_subprogram) |
| 1702 | { |
| 1703 | CORE_ADDR low, high; |
| 1704 | |
| 1705 | if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile)) |
| 1706 | { |
| 1707 | lowpc = min (lowpc, low); |
| 1708 | highpc = max (highpc, high); |
| 1709 | } |
| 1710 | } |
| 1711 | child_die = sibling_die (child_die); |
| 1712 | } |
| 1713 | } |
| 1714 | } |
| 1715 | |
| 1716 | /* If we didn't find a lowpc, set it to highpc to avoid complaints |
| 1717 | from finish_block. */ |
| 1718 | if (lowpc == ((CORE_ADDR) -1)) |
| 1719 | lowpc = highpc; |
| 1720 | lowpc += baseaddr; |
| 1721 | highpc += baseaddr; |
| 1722 | |
| 1723 | attr = dwarf_attr (die, DW_AT_name); |
| 1724 | if (attr) |
| 1725 | { |
| 1726 | name = DW_STRING (attr); |
| 1727 | } |
| 1728 | attr = dwarf_attr (die, DW_AT_comp_dir); |
| 1729 | if (attr) |
| 1730 | { |
| 1731 | comp_dir = DW_STRING (attr); |
| 1732 | if (comp_dir) |
| 1733 | { |
| 1734 | /* Irix 6.2 native cc prepends <machine>.: to the compilation |
| 1735 | directory, get rid of it. */ |
| 1736 | char *cp = strchr (comp_dir, ':'); |
| 1737 | |
| 1738 | if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/') |
| 1739 | comp_dir = cp + 1; |
| 1740 | } |
| 1741 | } |
| 1742 | |
| 1743 | if (objfile->ei.entry_point >= lowpc && |
| 1744 | objfile->ei.entry_point < highpc) |
| 1745 | { |
| 1746 | objfile->ei.entry_file_lowpc = lowpc; |
| 1747 | objfile->ei.entry_file_highpc = highpc; |
| 1748 | } |
| 1749 | |
| 1750 | attr = dwarf_attr (die, DW_AT_language); |
| 1751 | if (attr) |
| 1752 | { |
| 1753 | set_cu_language (DW_UNSND (attr)); |
| 1754 | } |
| 1755 | |
| 1756 | /* We assume that we're processing GCC output. */ |
| 1757 | processing_gcc_compilation = 2; |
| 1758 | #if 0 |
| 1759 | /* FIXME:Do something here. */ |
| 1760 | if (dip->at_producer != NULL) |
| 1761 | { |
| 1762 | handle_producer (dip->at_producer); |
| 1763 | } |
| 1764 | #endif |
| 1765 | |
| 1766 | /* The compilation unit may be in a different language or objfile, |
| 1767 | zero out all remembered fundamental types. */ |
| 1768 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); |
| 1769 | |
| 1770 | start_symtab (name, comp_dir, lowpc); |
| 1771 | record_debugformat ("DWARF 2"); |
| 1772 | |
| 1773 | initialize_cu_func_list (); |
| 1774 | |
| 1775 | /* Process all dies in compilation unit. */ |
| 1776 | if (die->has_children) |
| 1777 | { |
| 1778 | child_die = die->next; |
| 1779 | while (child_die && child_die->tag) |
| 1780 | { |
| 1781 | process_die (child_die, objfile, cu_header); |
| 1782 | child_die = sibling_die (child_die); |
| 1783 | } |
| 1784 | } |
| 1785 | |
| 1786 | /* Decode line number information if present. */ |
| 1787 | attr = dwarf_attr (die, DW_AT_stmt_list); |
| 1788 | if (attr) |
| 1789 | { |
| 1790 | unsigned int line_offset = DW_UNSND (attr); |
| 1791 | line_header = dwarf_decode_line_header (line_offset, |
| 1792 | abfd, cu_header); |
| 1793 | if (line_header) |
| 1794 | { |
| 1795 | make_cleanup ((make_cleanup_ftype *) free_line_header, |
| 1796 | (void *) line_header); |
| 1797 | dwarf_decode_lines (line_header, comp_dir, abfd, cu_header); |
| 1798 | } |
| 1799 | } |
| 1800 | |
| 1801 | /* Decode macro information, if present. Dwarf 2 macro information |
| 1802 | refers to information in the line number info statement program |
| 1803 | header, so we can only read it if we've read the header |
| 1804 | successfully. */ |
| 1805 | attr = dwarf_attr (die, DW_AT_macro_info); |
| 1806 | if (attr) |
| 1807 | { |
| 1808 | unsigned int macro_offset = DW_UNSND (attr); |
| 1809 | dwarf_decode_macros (line_header, macro_offset, |
| 1810 | comp_dir, abfd, cu_header, objfile); |
| 1811 | } |
| 1812 | do_cleanups (back_to); |
| 1813 | } |
| 1814 | |
| 1815 | static void |
| 1816 | add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc) |
| 1817 | { |
| 1818 | struct function_range *thisfn; |
| 1819 | |
| 1820 | thisfn = (struct function_range *) |
| 1821 | obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct function_range)); |
| 1822 | thisfn->name = name; |
| 1823 | thisfn->lowpc = lowpc; |
| 1824 | thisfn->highpc = highpc; |
| 1825 | thisfn->seen_line = 0; |
| 1826 | thisfn->next = NULL; |
| 1827 | |
| 1828 | if (cu_last_fn == NULL) |
| 1829 | cu_first_fn = thisfn; |
| 1830 | else |
| 1831 | cu_last_fn->next = thisfn; |
| 1832 | |
| 1833 | cu_last_fn = thisfn; |
| 1834 | } |
| 1835 | |
| 1836 | static void |
| 1837 | read_func_scope (struct die_info *die, struct objfile *objfile, |
| 1838 | const struct comp_unit_head *cu_header) |
| 1839 | { |
| 1840 | register struct context_stack *new; |
| 1841 | CORE_ADDR lowpc; |
| 1842 | CORE_ADDR highpc; |
| 1843 | struct die_info *child_die; |
| 1844 | struct attribute *attr; |
| 1845 | char *name; |
| 1846 | |
| 1847 | name = dwarf2_linkage_name (die); |
| 1848 | |
| 1849 | /* Ignore functions with missing or empty names and functions with |
| 1850 | missing or invalid low and high pc attributes. */ |
| 1851 | if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile)) |
| 1852 | return; |
| 1853 | |
| 1854 | lowpc += baseaddr; |
| 1855 | highpc += baseaddr; |
| 1856 | |
| 1857 | /* Record the function range for dwarf_decode_lines. */ |
| 1858 | add_to_cu_func_list (name, lowpc, highpc); |
| 1859 | |
| 1860 | if (objfile->ei.entry_point >= lowpc && |
| 1861 | objfile->ei.entry_point < highpc) |
| 1862 | { |
| 1863 | objfile->ei.entry_func_lowpc = lowpc; |
| 1864 | objfile->ei.entry_func_highpc = highpc; |
| 1865 | } |
| 1866 | |
| 1867 | /* Decode DW_AT_frame_base location descriptor if present, keep result |
| 1868 | for DW_OP_fbreg operands in decode_locdesc. */ |
| 1869 | frame_base_reg = -1; |
| 1870 | frame_base_offset = 0; |
| 1871 | attr = dwarf_attr (die, DW_AT_frame_base); |
| 1872 | if (attr) |
| 1873 | { |
| 1874 | CORE_ADDR addr = decode_locdesc (DW_BLOCK (attr), objfile, cu_header); |
| 1875 | if (isderef) |
| 1876 | complain (&dwarf2_unsupported_at_frame_base, name); |
| 1877 | else if (isreg) |
| 1878 | frame_base_reg = addr; |
| 1879 | else if (offreg) |
| 1880 | { |
| 1881 | frame_base_reg = basereg; |
| 1882 | frame_base_offset = addr; |
| 1883 | } |
| 1884 | else |
| 1885 | complain (&dwarf2_unsupported_at_frame_base, name); |
| 1886 | } |
| 1887 | |
| 1888 | new = push_context (0, lowpc); |
| 1889 | new->name = new_symbol (die, die->type, objfile, cu_header); |
| 1890 | list_in_scope = &local_symbols; |
| 1891 | |
| 1892 | if (die->has_children) |
| 1893 | { |
| 1894 | child_die = die->next; |
| 1895 | while (child_die && child_die->tag) |
| 1896 | { |
| 1897 | process_die (child_die, objfile, cu_header); |
| 1898 | child_die = sibling_die (child_die); |
| 1899 | } |
| 1900 | } |
| 1901 | |
| 1902 | new = pop_context (); |
| 1903 | /* Make a block for the local symbols within. */ |
| 1904 | finish_block (new->name, &local_symbols, new->old_blocks, |
| 1905 | lowpc, highpc, objfile); |
| 1906 | list_in_scope = &file_symbols; |
| 1907 | } |
| 1908 | |
| 1909 | /* Process all the DIES contained within a lexical block scope. Start |
| 1910 | a new scope, process the dies, and then close the scope. */ |
| 1911 | |
| 1912 | static void |
| 1913 | read_lexical_block_scope (struct die_info *die, struct objfile *objfile, |
| 1914 | const struct comp_unit_head *cu_header) |
| 1915 | { |
| 1916 | register struct context_stack *new; |
| 1917 | CORE_ADDR lowpc, highpc; |
| 1918 | struct die_info *child_die; |
| 1919 | |
| 1920 | /* Ignore blocks with missing or invalid low and high pc attributes. */ |
| 1921 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile)) |
| 1922 | return; |
| 1923 | lowpc += baseaddr; |
| 1924 | highpc += baseaddr; |
| 1925 | |
| 1926 | push_context (0, lowpc); |
| 1927 | if (die->has_children) |
| 1928 | { |
| 1929 | child_die = die->next; |
| 1930 | while (child_die && child_die->tag) |
| 1931 | { |
| 1932 | process_die (child_die, objfile, cu_header); |
| 1933 | child_die = sibling_die (child_die); |
| 1934 | } |
| 1935 | } |
| 1936 | new = pop_context (); |
| 1937 | |
| 1938 | if (local_symbols != NULL) |
| 1939 | { |
| 1940 | finish_block (0, &local_symbols, new->old_blocks, new->start_addr, |
| 1941 | highpc, objfile); |
| 1942 | } |
| 1943 | local_symbols = new->locals; |
| 1944 | } |
| 1945 | |
| 1946 | /* Get low and high pc attributes from a die. |
| 1947 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
| 1948 | |
| 1949 | static int |
| 1950 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 1951 | struct objfile *objfile) |
| 1952 | { |
| 1953 | struct attribute *attr; |
| 1954 | CORE_ADDR low; |
| 1955 | CORE_ADDR high; |
| 1956 | |
| 1957 | attr = dwarf_attr (die, DW_AT_low_pc); |
| 1958 | if (attr) |
| 1959 | low = DW_ADDR (attr); |
| 1960 | else |
| 1961 | return 0; |
| 1962 | attr = dwarf_attr (die, DW_AT_high_pc); |
| 1963 | if (attr) |
| 1964 | high = DW_ADDR (attr); |
| 1965 | else |
| 1966 | return 0; |
| 1967 | |
| 1968 | if (high < low) |
| 1969 | return 0; |
| 1970 | |
| 1971 | /* When using the GNU linker, .gnu.linkonce. sections are used to |
| 1972 | eliminate duplicate copies of functions and vtables and such. |
| 1973 | The linker will arbitrarily choose one and discard the others. |
| 1974 | The AT_*_pc values for such functions refer to local labels in |
| 1975 | these sections. If the section from that file was discarded, the |
| 1976 | labels are not in the output, so the relocs get a value of 0. |
| 1977 | If this is a discarded function, mark the pc bounds as invalid, |
| 1978 | so that GDB will ignore it. */ |
| 1979 | if (low == 0 && (bfd_get_file_flags (objfile->obfd) & HAS_RELOC) == 0) |
| 1980 | return 0; |
| 1981 | |
| 1982 | *lowpc = low; |
| 1983 | *highpc = high; |
| 1984 | return 1; |
| 1985 | } |
| 1986 | |
| 1987 | /* Add an aggregate field to the field list. */ |
| 1988 | |
| 1989 | static void |
| 1990 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
| 1991 | struct objfile *objfile, |
| 1992 | const struct comp_unit_head *cu_header) |
| 1993 | { |
| 1994 | struct nextfield *new_field; |
| 1995 | struct attribute *attr; |
| 1996 | struct field *fp; |
| 1997 | char *fieldname = ""; |
| 1998 | |
| 1999 | /* Allocate a new field list entry and link it in. */ |
| 2000 | new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); |
| 2001 | make_cleanup (xfree, new_field); |
| 2002 | memset (new_field, 0, sizeof (struct nextfield)); |
| 2003 | new_field->next = fip->fields; |
| 2004 | fip->fields = new_field; |
| 2005 | fip->nfields++; |
| 2006 | |
| 2007 | /* Handle accessibility and virtuality of field. |
| 2008 | The default accessibility for members is public, the default |
| 2009 | accessibility for inheritance is private. */ |
| 2010 | if (die->tag != DW_TAG_inheritance) |
| 2011 | new_field->accessibility = DW_ACCESS_public; |
| 2012 | else |
| 2013 | new_field->accessibility = DW_ACCESS_private; |
| 2014 | new_field->virtuality = DW_VIRTUALITY_none; |
| 2015 | |
| 2016 | attr = dwarf_attr (die, DW_AT_accessibility); |
| 2017 | if (attr) |
| 2018 | new_field->accessibility = DW_UNSND (attr); |
| 2019 | if (new_field->accessibility != DW_ACCESS_public) |
| 2020 | fip->non_public_fields = 1; |
| 2021 | attr = dwarf_attr (die, DW_AT_virtuality); |
| 2022 | if (attr) |
| 2023 | new_field->virtuality = DW_UNSND (attr); |
| 2024 | |
| 2025 | fp = &new_field->field; |
| 2026 | if (die->tag == DW_TAG_member) |
| 2027 | { |
| 2028 | /* Get type of field. */ |
| 2029 | fp->type = die_type (die, objfile, cu_header); |
| 2030 | |
| 2031 | /* Get bit size of field (zero if none). */ |
| 2032 | attr = dwarf_attr (die, DW_AT_bit_size); |
| 2033 | if (attr) |
| 2034 | { |
| 2035 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); |
| 2036 | } |
| 2037 | else |
| 2038 | { |
| 2039 | FIELD_BITSIZE (*fp) = 0; |
| 2040 | } |
| 2041 | |
| 2042 | /* Get bit offset of field. */ |
| 2043 | attr = dwarf_attr (die, DW_AT_data_member_location); |
| 2044 | if (attr) |
| 2045 | { |
| 2046 | FIELD_BITPOS (*fp) = |
| 2047 | decode_locdesc (DW_BLOCK (attr), objfile, cu_header) * bits_per_byte; |
| 2048 | } |
| 2049 | else |
| 2050 | FIELD_BITPOS (*fp) = 0; |
| 2051 | attr = dwarf_attr (die, DW_AT_bit_offset); |
| 2052 | if (attr) |
| 2053 | { |
| 2054 | if (BITS_BIG_ENDIAN) |
| 2055 | { |
| 2056 | /* For big endian bits, the DW_AT_bit_offset gives the |
| 2057 | additional bit offset from the MSB of the containing |
| 2058 | anonymous object to the MSB of the field. We don't |
| 2059 | have to do anything special since we don't need to |
| 2060 | know the size of the anonymous object. */ |
| 2061 | FIELD_BITPOS (*fp) += DW_UNSND (attr); |
| 2062 | } |
| 2063 | else |
| 2064 | { |
| 2065 | /* For little endian bits, compute the bit offset to the |
| 2066 | MSB of the anonymous object, subtract off the number of |
| 2067 | bits from the MSB of the field to the MSB of the |
| 2068 | object, and then subtract off the number of bits of |
| 2069 | the field itself. The result is the bit offset of |
| 2070 | the LSB of the field. */ |
| 2071 | int anonymous_size; |
| 2072 | int bit_offset = DW_UNSND (attr); |
| 2073 | |
| 2074 | attr = dwarf_attr (die, DW_AT_byte_size); |
| 2075 | if (attr) |
| 2076 | { |
| 2077 | /* The size of the anonymous object containing |
| 2078 | the bit field is explicit, so use the |
| 2079 | indicated size (in bytes). */ |
| 2080 | anonymous_size = DW_UNSND (attr); |
| 2081 | } |
| 2082 | else |
| 2083 | { |
| 2084 | /* The size of the anonymous object containing |
| 2085 | the bit field must be inferred from the type |
| 2086 | attribute of the data member containing the |
| 2087 | bit field. */ |
| 2088 | anonymous_size = TYPE_LENGTH (fp->type); |
| 2089 | } |
| 2090 | FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte |
| 2091 | - bit_offset - FIELD_BITSIZE (*fp); |
| 2092 | } |
| 2093 | } |
| 2094 | |
| 2095 | /* Get name of field. */ |
| 2096 | attr = dwarf_attr (die, DW_AT_name); |
| 2097 | if (attr && DW_STRING (attr)) |
| 2098 | fieldname = DW_STRING (attr); |
| 2099 | fp->name = obsavestring (fieldname, strlen (fieldname), |
| 2100 | &objfile->type_obstack); |
| 2101 | |
| 2102 | /* Change accessibility for artificial fields (e.g. virtual table |
| 2103 | pointer or virtual base class pointer) to private. */ |
| 2104 | if (dwarf_attr (die, DW_AT_artificial)) |
| 2105 | { |
| 2106 | new_field->accessibility = DW_ACCESS_private; |
| 2107 | fip->non_public_fields = 1; |
| 2108 | } |
| 2109 | } |
| 2110 | else if (die->tag == DW_TAG_variable) |
| 2111 | { |
| 2112 | char *physname; |
| 2113 | |
| 2114 | /* C++ static member. |
| 2115 | Get name of field. */ |
| 2116 | attr = dwarf_attr (die, DW_AT_name); |
| 2117 | if (attr && DW_STRING (attr)) |
| 2118 | fieldname = DW_STRING (attr); |
| 2119 | else |
| 2120 | return; |
| 2121 | |
| 2122 | /* Get physical name. */ |
| 2123 | physname = dwarf2_linkage_name (die); |
| 2124 | |
| 2125 | SET_FIELD_PHYSNAME (*fp, obsavestring (physname, strlen (physname), |
| 2126 | &objfile->type_obstack)); |
| 2127 | FIELD_TYPE (*fp) = die_type (die, objfile, cu_header); |
| 2128 | FIELD_NAME (*fp) = obsavestring (fieldname, strlen (fieldname), |
| 2129 | &objfile->type_obstack); |
| 2130 | } |
| 2131 | else if (die->tag == DW_TAG_inheritance) |
| 2132 | { |
| 2133 | /* C++ base class field. */ |
| 2134 | attr = dwarf_attr (die, DW_AT_data_member_location); |
| 2135 | if (attr) |
| 2136 | FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), objfile, cu_header) |
| 2137 | * bits_per_byte); |
| 2138 | FIELD_BITSIZE (*fp) = 0; |
| 2139 | FIELD_TYPE (*fp) = die_type (die, objfile, cu_header); |
| 2140 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
| 2141 | fip->nbaseclasses++; |
| 2142 | } |
| 2143 | } |
| 2144 | |
| 2145 | /* Create the vector of fields, and attach it to the type. */ |
| 2146 | |
| 2147 | static void |
| 2148 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
| 2149 | struct objfile *objfile) |
| 2150 | { |
| 2151 | int nfields = fip->nfields; |
| 2152 | |
| 2153 | /* Record the field count, allocate space for the array of fields, |
| 2154 | and create blank accessibility bitfields if necessary. */ |
| 2155 | TYPE_NFIELDS (type) = nfields; |
| 2156 | TYPE_FIELDS (type) = (struct field *) |
| 2157 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
| 2158 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); |
| 2159 | |
| 2160 | if (fip->non_public_fields) |
| 2161 | { |
| 2162 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 2163 | |
| 2164 | TYPE_FIELD_PRIVATE_BITS (type) = |
| 2165 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 2166 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); |
| 2167 | |
| 2168 | TYPE_FIELD_PROTECTED_BITS (type) = |
| 2169 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 2170 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); |
| 2171 | |
| 2172 | TYPE_FIELD_IGNORE_BITS (type) = |
| 2173 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 2174 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); |
| 2175 | } |
| 2176 | |
| 2177 | /* If the type has baseclasses, allocate and clear a bit vector for |
| 2178 | TYPE_FIELD_VIRTUAL_BITS. */ |
| 2179 | if (fip->nbaseclasses) |
| 2180 | { |
| 2181 | int num_bytes = B_BYTES (fip->nbaseclasses); |
| 2182 | char *pointer; |
| 2183 | |
| 2184 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 2185 | pointer = (char *) TYPE_ALLOC (type, num_bytes); |
| 2186 | TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer; |
| 2187 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
| 2188 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; |
| 2189 | } |
| 2190 | |
| 2191 | /* Copy the saved-up fields into the field vector. Start from the head |
| 2192 | of the list, adding to the tail of the field array, so that they end |
| 2193 | up in the same order in the array in which they were added to the list. */ |
| 2194 | while (nfields-- > 0) |
| 2195 | { |
| 2196 | TYPE_FIELD (type, nfields) = fip->fields->field; |
| 2197 | switch (fip->fields->accessibility) |
| 2198 | { |
| 2199 | case DW_ACCESS_private: |
| 2200 | SET_TYPE_FIELD_PRIVATE (type, nfields); |
| 2201 | break; |
| 2202 | |
| 2203 | case DW_ACCESS_protected: |
| 2204 | SET_TYPE_FIELD_PROTECTED (type, nfields); |
| 2205 | break; |
| 2206 | |
| 2207 | case DW_ACCESS_public: |
| 2208 | break; |
| 2209 | |
| 2210 | default: |
| 2211 | /* Unknown accessibility. Complain and treat it as public. */ |
| 2212 | { |
| 2213 | complain (&dwarf2_unsupported_accessibility, |
| 2214 | fip->fields->accessibility); |
| 2215 | } |
| 2216 | break; |
| 2217 | } |
| 2218 | if (nfields < fip->nbaseclasses) |
| 2219 | { |
| 2220 | switch (fip->fields->virtuality) |
| 2221 | { |
| 2222 | case DW_VIRTUALITY_virtual: |
| 2223 | case DW_VIRTUALITY_pure_virtual: |
| 2224 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
| 2225 | break; |
| 2226 | } |
| 2227 | } |
| 2228 | fip->fields = fip->fields->next; |
| 2229 | } |
| 2230 | } |
| 2231 | |
| 2232 | /* Add a member function to the proper fieldlist. */ |
| 2233 | |
| 2234 | static void |
| 2235 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
| 2236 | struct type *type, struct objfile *objfile, |
| 2237 | const struct comp_unit_head *cu_header) |
| 2238 | { |
| 2239 | struct attribute *attr; |
| 2240 | struct fnfieldlist *flp; |
| 2241 | int i; |
| 2242 | struct fn_field *fnp; |
| 2243 | char *fieldname; |
| 2244 | char *physname; |
| 2245 | struct nextfnfield *new_fnfield; |
| 2246 | |
| 2247 | /* Get name of member function. */ |
| 2248 | attr = dwarf_attr (die, DW_AT_name); |
| 2249 | if (attr && DW_STRING (attr)) |
| 2250 | fieldname = DW_STRING (attr); |
| 2251 | else |
| 2252 | return; |
| 2253 | |
| 2254 | /* Get the mangled name. */ |
| 2255 | physname = dwarf2_linkage_name (die); |
| 2256 | |
| 2257 | /* Look up member function name in fieldlist. */ |
| 2258 | for (i = 0; i < fip->nfnfields; i++) |
| 2259 | { |
| 2260 | if (STREQ (fip->fnfieldlists[i].name, fieldname)) |
| 2261 | break; |
| 2262 | } |
| 2263 | |
| 2264 | /* Create new list element if necessary. */ |
| 2265 | if (i < fip->nfnfields) |
| 2266 | flp = &fip->fnfieldlists[i]; |
| 2267 | else |
| 2268 | { |
| 2269 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) |
| 2270 | { |
| 2271 | fip->fnfieldlists = (struct fnfieldlist *) |
| 2272 | xrealloc (fip->fnfieldlists, |
| 2273 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) |
| 2274 | * sizeof (struct fnfieldlist)); |
| 2275 | if (fip->nfnfields == 0) |
| 2276 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
| 2277 | } |
| 2278 | flp = &fip->fnfieldlists[fip->nfnfields]; |
| 2279 | flp->name = fieldname; |
| 2280 | flp->length = 0; |
| 2281 | flp->head = NULL; |
| 2282 | fip->nfnfields++; |
| 2283 | } |
| 2284 | |
| 2285 | /* Create a new member function field and chain it to the field list |
| 2286 | entry. */ |
| 2287 | new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); |
| 2288 | make_cleanup (xfree, new_fnfield); |
| 2289 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
| 2290 | new_fnfield->next = flp->head; |
| 2291 | flp->head = new_fnfield; |
| 2292 | flp->length++; |
| 2293 | |
| 2294 | /* Fill in the member function field info. */ |
| 2295 | fnp = &new_fnfield->fnfield; |
| 2296 | fnp->physname = obsavestring (physname, strlen (physname), |
| 2297 | &objfile->type_obstack); |
| 2298 | fnp->type = alloc_type (objfile); |
| 2299 | if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC) |
| 2300 | { |
| 2301 | struct type *return_type = TYPE_TARGET_TYPE (die->type); |
| 2302 | struct type **arg_types; |
| 2303 | int nparams = TYPE_NFIELDS (die->type); |
| 2304 | int iparams; |
| 2305 | |
| 2306 | /* Copy argument types from the subroutine type. */ |
| 2307 | arg_types = (struct type **) |
| 2308 | TYPE_ALLOC (fnp->type, (nparams + 1) * sizeof (struct type *)); |
| 2309 | for (iparams = 0; iparams < nparams; iparams++) |
| 2310 | arg_types[iparams] = TYPE_FIELD_TYPE (die->type, iparams); |
| 2311 | |
| 2312 | /* Set last entry in argument type vector. */ |
| 2313 | if (TYPE_VARARGS (die->type)) |
| 2314 | arg_types[nparams] = NULL; |
| 2315 | else |
| 2316 | arg_types[nparams] = dwarf2_fundamental_type (objfile, FT_VOID); |
| 2317 | |
| 2318 | smash_to_method_type (fnp->type, type, return_type, arg_types); |
| 2319 | |
| 2320 | /* Handle static member functions. |
| 2321 | Dwarf2 has no clean way to discern C++ static and non-static |
| 2322 | member functions. G++ helps GDB by marking the first |
| 2323 | parameter for non-static member functions (which is the |
| 2324 | this pointer) as artificial. We obtain this information |
| 2325 | from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ |
| 2326 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0) |
| 2327 | fnp->voffset = VOFFSET_STATIC; |
| 2328 | } |
| 2329 | else |
| 2330 | complain (&dwarf2_missing_member_fn_type_complaint, physname); |
| 2331 | |
| 2332 | /* Get fcontext from DW_AT_containing_type if present. */ |
| 2333 | if (dwarf_attr (die, DW_AT_containing_type) != NULL) |
| 2334 | fnp->fcontext = die_containing_type (die, objfile, cu_header); |
| 2335 | |
| 2336 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const |
| 2337 | and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ |
| 2338 | |
| 2339 | /* Get accessibility. */ |
| 2340 | attr = dwarf_attr (die, DW_AT_accessibility); |
| 2341 | if (attr) |
| 2342 | { |
| 2343 | switch (DW_UNSND (attr)) |
| 2344 | { |
| 2345 | case DW_ACCESS_private: |
| 2346 | fnp->is_private = 1; |
| 2347 | break; |
| 2348 | case DW_ACCESS_protected: |
| 2349 | fnp->is_protected = 1; |
| 2350 | break; |
| 2351 | } |
| 2352 | } |
| 2353 | |
| 2354 | /* Check for artificial methods. */ |
| 2355 | attr = dwarf_attr (die, DW_AT_artificial); |
| 2356 | if (attr && DW_UNSND (attr) != 0) |
| 2357 | fnp->is_artificial = 1; |
| 2358 | |
| 2359 | /* Get index in virtual function table if it is a virtual member function. */ |
| 2360 | attr = dwarf_attr (die, DW_AT_vtable_elem_location); |
| 2361 | if (attr) |
| 2362 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), objfile, cu_header) + 2; |
| 2363 | } |
| 2364 | |
| 2365 | /* Create the vector of member function fields, and attach it to the type. */ |
| 2366 | |
| 2367 | static void |
| 2368 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
| 2369 | struct objfile *objfile) |
| 2370 | { |
| 2371 | struct fnfieldlist *flp; |
| 2372 | int total_length = 0; |
| 2373 | int i; |
| 2374 | |
| 2375 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 2376 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) |
| 2377 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); |
| 2378 | |
| 2379 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) |
| 2380 | { |
| 2381 | struct nextfnfield *nfp = flp->head; |
| 2382 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
| 2383 | int k; |
| 2384 | |
| 2385 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; |
| 2386 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; |
| 2387 | fn_flp->fn_fields = (struct fn_field *) |
| 2388 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); |
| 2389 | for (k = flp->length; (k--, nfp); nfp = nfp->next) |
| 2390 | fn_flp->fn_fields[k] = nfp->fnfield; |
| 2391 | |
| 2392 | total_length += flp->length; |
| 2393 | } |
| 2394 | |
| 2395 | TYPE_NFN_FIELDS (type) = fip->nfnfields; |
| 2396 | TYPE_NFN_FIELDS_TOTAL (type) = total_length; |
| 2397 | } |
| 2398 | |
| 2399 | /* Called when we find the DIE that starts a structure or union scope |
| 2400 | (definition) to process all dies that define the members of the |
| 2401 | structure or union. |
| 2402 | |
| 2403 | NOTE: we need to call struct_type regardless of whether or not the |
| 2404 | DIE has an at_name attribute, since it might be an anonymous |
| 2405 | structure or union. This gets the type entered into our set of |
| 2406 | user defined types. |
| 2407 | |
| 2408 | However, if the structure is incomplete (an opaque struct/union) |
| 2409 | then suppress creating a symbol table entry for it since gdb only |
| 2410 | wants to find the one with the complete definition. Note that if |
| 2411 | it is complete, we just call new_symbol, which does it's own |
| 2412 | checking about whether the struct/union is anonymous or not (and |
| 2413 | suppresses creating a symbol table entry itself). */ |
| 2414 | |
| 2415 | static void |
| 2416 | read_structure_scope (struct die_info *die, struct objfile *objfile, |
| 2417 | const struct comp_unit_head *cu_header) |
| 2418 | { |
| 2419 | struct type *type; |
| 2420 | struct attribute *attr; |
| 2421 | |
| 2422 | type = alloc_type (objfile); |
| 2423 | |
| 2424 | INIT_CPLUS_SPECIFIC (type); |
| 2425 | attr = dwarf_attr (die, DW_AT_name); |
| 2426 | if (attr && DW_STRING (attr)) |
| 2427 | { |
| 2428 | TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr), |
| 2429 | strlen (DW_STRING (attr)), |
| 2430 | &objfile->type_obstack); |
| 2431 | } |
| 2432 | |
| 2433 | if (die->tag == DW_TAG_structure_type) |
| 2434 | { |
| 2435 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
| 2436 | } |
| 2437 | else if (die->tag == DW_TAG_union_type) |
| 2438 | { |
| 2439 | TYPE_CODE (type) = TYPE_CODE_UNION; |
| 2440 | } |
| 2441 | else |
| 2442 | { |
| 2443 | /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT |
| 2444 | in gdbtypes.h. */ |
| 2445 | TYPE_CODE (type) = TYPE_CODE_CLASS; |
| 2446 | } |
| 2447 | |
| 2448 | attr = dwarf_attr (die, DW_AT_byte_size); |
| 2449 | if (attr) |
| 2450 | { |
| 2451 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 2452 | } |
| 2453 | else |
| 2454 | { |
| 2455 | TYPE_LENGTH (type) = 0; |
| 2456 | } |
| 2457 | |
| 2458 | /* We need to add the type field to the die immediately so we don't |
| 2459 | infinitely recurse when dealing with pointers to the structure |
| 2460 | type within the structure itself. */ |
| 2461 | die->type = type; |
| 2462 | |
| 2463 | if (die->has_children && ! die_is_declaration (die)) |
| 2464 | { |
| 2465 | struct field_info fi; |
| 2466 | struct die_info *child_die; |
| 2467 | struct cleanup *back_to = make_cleanup (null_cleanup, NULL); |
| 2468 | |
| 2469 | memset (&fi, 0, sizeof (struct field_info)); |
| 2470 | |
| 2471 | child_die = die->next; |
| 2472 | |
| 2473 | while (child_die && child_die->tag) |
| 2474 | { |
| 2475 | if (child_die->tag == DW_TAG_member) |
| 2476 | { |
| 2477 | dwarf2_add_field (&fi, child_die, objfile, cu_header); |
| 2478 | } |
| 2479 | else if (child_die->tag == DW_TAG_variable) |
| 2480 | { |
| 2481 | /* C++ static member. */ |
| 2482 | dwarf2_add_field (&fi, child_die, objfile, cu_header); |
| 2483 | } |
| 2484 | else if (child_die->tag == DW_TAG_subprogram) |
| 2485 | { |
| 2486 | /* C++ member function. */ |
| 2487 | process_die (child_die, objfile, cu_header); |
| 2488 | dwarf2_add_member_fn (&fi, child_die, type, objfile, cu_header); |
| 2489 | } |
| 2490 | else if (child_die->tag == DW_TAG_inheritance) |
| 2491 | { |
| 2492 | /* C++ base class field. */ |
| 2493 | dwarf2_add_field (&fi, child_die, objfile, cu_header); |
| 2494 | } |
| 2495 | else |
| 2496 | { |
| 2497 | process_die (child_die, objfile, cu_header); |
| 2498 | } |
| 2499 | child_die = sibling_die (child_die); |
| 2500 | } |
| 2501 | |
| 2502 | /* Attach fields and member functions to the type. */ |
| 2503 | if (fi.nfields) |
| 2504 | dwarf2_attach_fields_to_type (&fi, type, objfile); |
| 2505 | if (fi.nfnfields) |
| 2506 | { |
| 2507 | dwarf2_attach_fn_fields_to_type (&fi, type, objfile); |
| 2508 | |
| 2509 | /* Get the type which refers to the base class (possibly this |
| 2510 | class itself) which contains the vtable pointer for the current |
| 2511 | class from the DW_AT_containing_type attribute. */ |
| 2512 | |
| 2513 | if (dwarf_attr (die, DW_AT_containing_type) != NULL) |
| 2514 | { |
| 2515 | struct type *t = die_containing_type (die, objfile, cu_header); |
| 2516 | |
| 2517 | TYPE_VPTR_BASETYPE (type) = t; |
| 2518 | if (type == t) |
| 2519 | { |
| 2520 | static const char vptr_name[] = |
| 2521 | {'_', 'v', 'p', 't', 'r', '\0'}; |
| 2522 | int i; |
| 2523 | |
| 2524 | /* Our own class provides vtbl ptr. */ |
| 2525 | for (i = TYPE_NFIELDS (t) - 1; |
| 2526 | i >= TYPE_N_BASECLASSES (t); |
| 2527 | --i) |
| 2528 | { |
| 2529 | char *fieldname = TYPE_FIELD_NAME (t, i); |
| 2530 | |
| 2531 | if (STREQN (fieldname, vptr_name, strlen (vptr_name) - 1) |
| 2532 | && is_cplus_marker (fieldname[strlen (vptr_name)])) |
| 2533 | { |
| 2534 | TYPE_VPTR_FIELDNO (type) = i; |
| 2535 | break; |
| 2536 | } |
| 2537 | } |
| 2538 | |
| 2539 | /* Complain if virtual function table field not found. */ |
| 2540 | if (i < TYPE_N_BASECLASSES (t)) |
| 2541 | complain (&dwarf2_vtbl_not_found_complaint, |
| 2542 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : ""); |
| 2543 | } |
| 2544 | else |
| 2545 | { |
| 2546 | TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); |
| 2547 | } |
| 2548 | } |
| 2549 | } |
| 2550 | |
| 2551 | new_symbol (die, type, objfile, cu_header); |
| 2552 | |
| 2553 | do_cleanups (back_to); |
| 2554 | } |
| 2555 | else |
| 2556 | { |
| 2557 | /* No children, must be stub. */ |
| 2558 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; |
| 2559 | } |
| 2560 | } |
| 2561 | |
| 2562 | /* Given a pointer to a die which begins an enumeration, process all |
| 2563 | the dies that define the members of the enumeration. |
| 2564 | |
| 2565 | This will be much nicer in draft 6 of the DWARF spec when our |
| 2566 | members will be dies instead squished into the DW_AT_element_list |
| 2567 | attribute. |
| 2568 | |
| 2569 | NOTE: We reverse the order of the element list. */ |
| 2570 | |
| 2571 | static void |
| 2572 | read_enumeration (struct die_info *die, struct objfile *objfile, |
| 2573 | const struct comp_unit_head *cu_header) |
| 2574 | { |
| 2575 | struct die_info *child_die; |
| 2576 | struct type *type; |
| 2577 | struct field *fields; |
| 2578 | struct attribute *attr; |
| 2579 | struct symbol *sym; |
| 2580 | int num_fields; |
| 2581 | int unsigned_enum = 1; |
| 2582 | |
| 2583 | type = alloc_type (objfile); |
| 2584 | |
| 2585 | TYPE_CODE (type) = TYPE_CODE_ENUM; |
| 2586 | attr = dwarf_attr (die, DW_AT_name); |
| 2587 | if (attr && DW_STRING (attr)) |
| 2588 | { |
| 2589 | TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr), |
| 2590 | strlen (DW_STRING (attr)), |
| 2591 | &objfile->type_obstack); |
| 2592 | } |
| 2593 | |
| 2594 | attr = dwarf_attr (die, DW_AT_byte_size); |
| 2595 | if (attr) |
| 2596 | { |
| 2597 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 2598 | } |
| 2599 | else |
| 2600 | { |
| 2601 | TYPE_LENGTH (type) = 0; |
| 2602 | } |
| 2603 | |
| 2604 | num_fields = 0; |
| 2605 | fields = NULL; |
| 2606 | if (die->has_children) |
| 2607 | { |
| 2608 | child_die = die->next; |
| 2609 | while (child_die && child_die->tag) |
| 2610 | { |
| 2611 | if (child_die->tag != DW_TAG_enumerator) |
| 2612 | { |
| 2613 | process_die (child_die, objfile, cu_header); |
| 2614 | } |
| 2615 | else |
| 2616 | { |
| 2617 | attr = dwarf_attr (child_die, DW_AT_name); |
| 2618 | if (attr) |
| 2619 | { |
| 2620 | sym = new_symbol (child_die, type, objfile, cu_header); |
| 2621 | if (SYMBOL_VALUE (sym) < 0) |
| 2622 | unsigned_enum = 0; |
| 2623 | |
| 2624 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) |
| 2625 | { |
| 2626 | fields = (struct field *) |
| 2627 | xrealloc (fields, |
| 2628 | (num_fields + DW_FIELD_ALLOC_CHUNK) |
| 2629 | * sizeof (struct field)); |
| 2630 | } |
| 2631 | |
| 2632 | FIELD_NAME (fields[num_fields]) = SYMBOL_NAME (sym); |
| 2633 | FIELD_TYPE (fields[num_fields]) = NULL; |
| 2634 | FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym); |
| 2635 | FIELD_BITSIZE (fields[num_fields]) = 0; |
| 2636 | |
| 2637 | num_fields++; |
| 2638 | } |
| 2639 | } |
| 2640 | |
| 2641 | child_die = sibling_die (child_die); |
| 2642 | } |
| 2643 | |
| 2644 | if (num_fields) |
| 2645 | { |
| 2646 | TYPE_NFIELDS (type) = num_fields; |
| 2647 | TYPE_FIELDS (type) = (struct field *) |
| 2648 | TYPE_ALLOC (type, sizeof (struct field) * num_fields); |
| 2649 | memcpy (TYPE_FIELDS (type), fields, |
| 2650 | sizeof (struct field) * num_fields); |
| 2651 | xfree (fields); |
| 2652 | } |
| 2653 | if (unsigned_enum) |
| 2654 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; |
| 2655 | } |
| 2656 | die->type = type; |
| 2657 | new_symbol (die, type, objfile, cu_header); |
| 2658 | } |
| 2659 | |
| 2660 | /* Extract all information from a DW_TAG_array_type DIE and put it in |
| 2661 | the DIE's type field. For now, this only handles one dimensional |
| 2662 | arrays. */ |
| 2663 | |
| 2664 | static void |
| 2665 | read_array_type (struct die_info *die, struct objfile *objfile, |
| 2666 | const struct comp_unit_head *cu_header) |
| 2667 | { |
| 2668 | struct die_info *child_die; |
| 2669 | struct type *type = NULL; |
| 2670 | struct type *element_type, *range_type, *index_type; |
| 2671 | struct type **range_types = NULL; |
| 2672 | struct attribute *attr; |
| 2673 | int ndim = 0; |
| 2674 | struct cleanup *back_to; |
| 2675 | |
| 2676 | /* Return if we've already decoded this type. */ |
| 2677 | if (die->type) |
| 2678 | { |
| 2679 | return; |
| 2680 | } |
| 2681 | |
| 2682 | element_type = die_type (die, objfile, cu_header); |
| 2683 | |
| 2684 | /* Irix 6.2 native cc creates array types without children for |
| 2685 | arrays with unspecified length. */ |
| 2686 | if (die->has_children == 0) |
| 2687 | { |
| 2688 | index_type = dwarf2_fundamental_type (objfile, FT_INTEGER); |
| 2689 | range_type = create_range_type (NULL, index_type, 0, -1); |
| 2690 | die->type = create_array_type (NULL, element_type, range_type); |
| 2691 | return; |
| 2692 | } |
| 2693 | |
| 2694 | back_to = make_cleanup (null_cleanup, NULL); |
| 2695 | child_die = die->next; |
| 2696 | while (child_die && child_die->tag) |
| 2697 | { |
| 2698 | if (child_die->tag == DW_TAG_subrange_type) |
| 2699 | { |
| 2700 | unsigned int low, high; |
| 2701 | |
| 2702 | /* Default bounds to an array with unspecified length. */ |
| 2703 | low = 0; |
| 2704 | high = -1; |
| 2705 | if (cu_language == language_fortran) |
| 2706 | { |
| 2707 | /* FORTRAN implies a lower bound of 1, if not given. */ |
| 2708 | low = 1; |
| 2709 | } |
| 2710 | |
| 2711 | index_type = die_type (child_die, objfile, cu_header); |
| 2712 | attr = dwarf_attr (child_die, DW_AT_lower_bound); |
| 2713 | if (attr) |
| 2714 | { |
| 2715 | if (attr->form == DW_FORM_sdata) |
| 2716 | { |
| 2717 | low = DW_SND (attr); |
| 2718 | } |
| 2719 | else if (attr->form == DW_FORM_udata |
| 2720 | || attr->form == DW_FORM_data1 |
| 2721 | || attr->form == DW_FORM_data2 |
| 2722 | || attr->form == DW_FORM_data4 |
| 2723 | || attr->form == DW_FORM_data8) |
| 2724 | { |
| 2725 | low = DW_UNSND (attr); |
| 2726 | } |
| 2727 | else |
| 2728 | { |
| 2729 | complain (&dwarf2_non_const_array_bound_ignored, |
| 2730 | dwarf_form_name (attr->form)); |
| 2731 | #ifdef FORTRAN_HACK |
| 2732 | die->type = lookup_pointer_type (element_type); |
| 2733 | return; |
| 2734 | #else |
| 2735 | low = 0; |
| 2736 | #endif |
| 2737 | } |
| 2738 | } |
| 2739 | attr = dwarf_attr (child_die, DW_AT_upper_bound); |
| 2740 | if (attr) |
| 2741 | { |
| 2742 | if (attr->form == DW_FORM_sdata) |
| 2743 | { |
| 2744 | high = DW_SND (attr); |
| 2745 | } |
| 2746 | else if (attr->form == DW_FORM_udata |
| 2747 | || attr->form == DW_FORM_data1 |
| 2748 | || attr->form == DW_FORM_data2 |
| 2749 | || attr->form == DW_FORM_data4 |
| 2750 | || attr->form == DW_FORM_data8) |
| 2751 | { |
| 2752 | high = DW_UNSND (attr); |
| 2753 | } |
| 2754 | else if (attr->form == DW_FORM_block1) |
| 2755 | { |
| 2756 | /* GCC encodes arrays with unspecified or dynamic length |
| 2757 | with a DW_FORM_block1 attribute. |
| 2758 | FIXME: GDB does not yet know how to handle dynamic |
| 2759 | arrays properly, treat them as arrays with unspecified |
| 2760 | length for now. */ |
| 2761 | high = -1; |
| 2762 | } |
| 2763 | else |
| 2764 | { |
| 2765 | complain (&dwarf2_non_const_array_bound_ignored, |
| 2766 | dwarf_form_name (attr->form)); |
| 2767 | #ifdef FORTRAN_HACK |
| 2768 | die->type = lookup_pointer_type (element_type); |
| 2769 | return; |
| 2770 | #else |
| 2771 | high = 1; |
| 2772 | #endif |
| 2773 | } |
| 2774 | } |
| 2775 | |
| 2776 | /* Create a range type and save it for array type creation. */ |
| 2777 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
| 2778 | { |
| 2779 | range_types = (struct type **) |
| 2780 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) |
| 2781 | * sizeof (struct type *)); |
| 2782 | if (ndim == 0) |
| 2783 | make_cleanup (free_current_contents, &range_types); |
| 2784 | } |
| 2785 | range_types[ndim++] = create_range_type (NULL, index_type, low, high); |
| 2786 | } |
| 2787 | child_die = sibling_die (child_die); |
| 2788 | } |
| 2789 | |
| 2790 | /* Dwarf2 dimensions are output from left to right, create the |
| 2791 | necessary array types in backwards order. */ |
| 2792 | type = element_type; |
| 2793 | while (ndim-- > 0) |
| 2794 | type = create_array_type (NULL, type, range_types[ndim]); |
| 2795 | |
| 2796 | /* Understand Dwarf2 support for vector types (like they occur on |
| 2797 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the |
| 2798 | array type. This is not part of the Dwarf2/3 standard yet, but a |
| 2799 | custom vendor extension. The main difference between a regular |
| 2800 | array and the vector variant is that vectors are passed by value |
| 2801 | to functions. */ |
| 2802 | attr = dwarf_attr (die, DW_AT_GNU_vector); |
| 2803 | if (attr) |
| 2804 | TYPE_FLAGS (type) |= TYPE_FLAG_VECTOR; |
| 2805 | |
| 2806 | do_cleanups (back_to); |
| 2807 | |
| 2808 | /* Install the type in the die. */ |
| 2809 | die->type = type; |
| 2810 | } |
| 2811 | |
| 2812 | /* First cut: install each common block member as a global variable. */ |
| 2813 | |
| 2814 | static void |
| 2815 | read_common_block (struct die_info *die, struct objfile *objfile, |
| 2816 | const struct comp_unit_head *cu_header) |
| 2817 | { |
| 2818 | struct die_info *child_die; |
| 2819 | struct attribute *attr; |
| 2820 | struct symbol *sym; |
| 2821 | CORE_ADDR base = (CORE_ADDR) 0; |
| 2822 | |
| 2823 | attr = dwarf_attr (die, DW_AT_location); |
| 2824 | if (attr) |
| 2825 | { |
| 2826 | base = decode_locdesc (DW_BLOCK (attr), objfile, cu_header); |
| 2827 | } |
| 2828 | if (die->has_children) |
| 2829 | { |
| 2830 | child_die = die->next; |
| 2831 | while (child_die && child_die->tag) |
| 2832 | { |
| 2833 | sym = new_symbol (child_die, NULL, objfile, cu_header); |
| 2834 | attr = dwarf_attr (child_die, DW_AT_data_member_location); |
| 2835 | if (attr) |
| 2836 | { |
| 2837 | SYMBOL_VALUE_ADDRESS (sym) = |
| 2838 | base + decode_locdesc (DW_BLOCK (attr), objfile, cu_header); |
| 2839 | add_symbol_to_list (sym, &global_symbols); |
| 2840 | } |
| 2841 | child_die = sibling_die (child_die); |
| 2842 | } |
| 2843 | } |
| 2844 | } |
| 2845 | |
| 2846 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
| 2847 | the user defined type vector. */ |
| 2848 | |
| 2849 | static void |
| 2850 | read_tag_pointer_type (struct die_info *die, struct objfile *objfile, |
| 2851 | const struct comp_unit_head *cu_header) |
| 2852 | { |
| 2853 | struct type *type; |
| 2854 | struct attribute *attr; |
| 2855 | |
| 2856 | if (die->type) |
| 2857 | { |
| 2858 | return; |
| 2859 | } |
| 2860 | |
| 2861 | type = lookup_pointer_type (die_type (die, objfile, cu_header)); |
| 2862 | attr = dwarf_attr (die, DW_AT_byte_size); |
| 2863 | if (attr) |
| 2864 | { |
| 2865 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 2866 | } |
| 2867 | else |
| 2868 | { |
| 2869 | TYPE_LENGTH (type) = cu_header->addr_size; |
| 2870 | } |
| 2871 | die->type = type; |
| 2872 | } |
| 2873 | |
| 2874 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to |
| 2875 | the user defined type vector. */ |
| 2876 | |
| 2877 | static void |
| 2878 | read_tag_ptr_to_member_type (struct die_info *die, struct objfile *objfile, |
| 2879 | const struct comp_unit_head *cu_header) |
| 2880 | { |
| 2881 | struct type *type; |
| 2882 | struct type *to_type; |
| 2883 | struct type *domain; |
| 2884 | |
| 2885 | if (die->type) |
| 2886 | { |
| 2887 | return; |
| 2888 | } |
| 2889 | |
| 2890 | type = alloc_type (objfile); |
| 2891 | to_type = die_type (die, objfile, cu_header); |
| 2892 | domain = die_containing_type (die, objfile, cu_header); |
| 2893 | smash_to_member_type (type, domain, to_type); |
| 2894 | |
| 2895 | die->type = type; |
| 2896 | } |
| 2897 | |
| 2898 | /* Extract all information from a DW_TAG_reference_type DIE and add to |
| 2899 | the user defined type vector. */ |
| 2900 | |
| 2901 | static void |
| 2902 | read_tag_reference_type (struct die_info *die, struct objfile *objfile, |
| 2903 | const struct comp_unit_head *cu_header) |
| 2904 | { |
| 2905 | struct type *type; |
| 2906 | struct attribute *attr; |
| 2907 | |
| 2908 | if (die->type) |
| 2909 | { |
| 2910 | return; |
| 2911 | } |
| 2912 | |
| 2913 | type = lookup_reference_type (die_type (die, objfile, cu_header)); |
| 2914 | attr = dwarf_attr (die, DW_AT_byte_size); |
| 2915 | if (attr) |
| 2916 | { |
| 2917 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 2918 | } |
| 2919 | else |
| 2920 | { |
| 2921 | TYPE_LENGTH (type) = cu_header->addr_size; |
| 2922 | } |
| 2923 | die->type = type; |
| 2924 | } |
| 2925 | |
| 2926 | static void |
| 2927 | read_tag_const_type (struct die_info *die, struct objfile *objfile, |
| 2928 | const struct comp_unit_head *cu_header) |
| 2929 | { |
| 2930 | struct type *base_type; |
| 2931 | |
| 2932 | if (die->type) |
| 2933 | { |
| 2934 | return; |
| 2935 | } |
| 2936 | |
| 2937 | base_type = die_type (die, objfile, cu_header); |
| 2938 | die->type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
| 2939 | } |
| 2940 | |
| 2941 | static void |
| 2942 | read_tag_volatile_type (struct die_info *die, struct objfile *objfile, |
| 2943 | const struct comp_unit_head *cu_header) |
| 2944 | { |
| 2945 | struct type *base_type; |
| 2946 | |
| 2947 | if (die->type) |
| 2948 | { |
| 2949 | return; |
| 2950 | } |
| 2951 | |
| 2952 | base_type = die_type (die, objfile, cu_header); |
| 2953 | die->type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
| 2954 | } |
| 2955 | |
| 2956 | /* Extract all information from a DW_TAG_string_type DIE and add to |
| 2957 | the user defined type vector. It isn't really a user defined type, |
| 2958 | but it behaves like one, with other DIE's using an AT_user_def_type |
| 2959 | attribute to reference it. */ |
| 2960 | |
| 2961 | static void |
| 2962 | read_tag_string_type (struct die_info *die, struct objfile *objfile) |
| 2963 | { |
| 2964 | struct type *type, *range_type, *index_type, *char_type; |
| 2965 | struct attribute *attr; |
| 2966 | unsigned int length; |
| 2967 | |
| 2968 | if (die->type) |
| 2969 | { |
| 2970 | return; |
| 2971 | } |
| 2972 | |
| 2973 | attr = dwarf_attr (die, DW_AT_string_length); |
| 2974 | if (attr) |
| 2975 | { |
| 2976 | length = DW_UNSND (attr); |
| 2977 | } |
| 2978 | else |
| 2979 | { |
| 2980 | /* check for the DW_AT_byte_size attribute */ |
| 2981 | attr = dwarf_attr (die, DW_AT_byte_size); |
| 2982 | if (attr) |
| 2983 | { |
| 2984 | length = DW_UNSND (attr); |
| 2985 | } |
| 2986 | else |
| 2987 | { |
| 2988 | length = 1; |
| 2989 | } |
| 2990 | } |
| 2991 | index_type = dwarf2_fundamental_type (objfile, FT_INTEGER); |
| 2992 | range_type = create_range_type (NULL, index_type, 1, length); |
| 2993 | if (cu_language == language_fortran) |
| 2994 | { |
| 2995 | /* Need to create a unique string type for bounds |
| 2996 | information */ |
| 2997 | type = create_string_type (0, range_type); |
| 2998 | } |
| 2999 | else |
| 3000 | { |
| 3001 | char_type = dwarf2_fundamental_type (objfile, FT_CHAR); |
| 3002 | type = create_string_type (char_type, range_type); |
| 3003 | } |
| 3004 | die->type = type; |
| 3005 | } |
| 3006 | |
| 3007 | /* Handle DIES due to C code like: |
| 3008 | |
| 3009 | struct foo |
| 3010 | { |
| 3011 | int (*funcp)(int a, long l); |
| 3012 | int b; |
| 3013 | }; |
| 3014 | |
| 3015 | ('funcp' generates a DW_TAG_subroutine_type DIE) |
| 3016 | */ |
| 3017 | |
| 3018 | static void |
| 3019 | read_subroutine_type (struct die_info *die, struct objfile *objfile, |
| 3020 | const struct comp_unit_head *cu_header) |
| 3021 | { |
| 3022 | struct type *type; /* Type that this function returns */ |
| 3023 | struct type *ftype; /* Function that returns above type */ |
| 3024 | struct attribute *attr; |
| 3025 | |
| 3026 | /* Decode the type that this subroutine returns */ |
| 3027 | if (die->type) |
| 3028 | { |
| 3029 | return; |
| 3030 | } |
| 3031 | type = die_type (die, objfile, cu_header); |
| 3032 | ftype = lookup_function_type (type); |
| 3033 | |
| 3034 | /* All functions in C++ have prototypes. */ |
| 3035 | attr = dwarf_attr (die, DW_AT_prototyped); |
| 3036 | if ((attr && (DW_UNSND (attr) != 0)) |
| 3037 | || cu_language == language_cplus) |
| 3038 | TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED; |
| 3039 | |
| 3040 | if (die->has_children) |
| 3041 | { |
| 3042 | struct die_info *child_die; |
| 3043 | int nparams = 0; |
| 3044 | int iparams = 0; |
| 3045 | |
| 3046 | /* Count the number of parameters. |
| 3047 | FIXME: GDB currently ignores vararg functions, but knows about |
| 3048 | vararg member functions. */ |
| 3049 | child_die = die->next; |
| 3050 | while (child_die && child_die->tag) |
| 3051 | { |
| 3052 | if (child_die->tag == DW_TAG_formal_parameter) |
| 3053 | nparams++; |
| 3054 | else if (child_die->tag == DW_TAG_unspecified_parameters) |
| 3055 | TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS; |
| 3056 | child_die = sibling_die (child_die); |
| 3057 | } |
| 3058 | |
| 3059 | /* Allocate storage for parameters and fill them in. */ |
| 3060 | TYPE_NFIELDS (ftype) = nparams; |
| 3061 | TYPE_FIELDS (ftype) = (struct field *) |
| 3062 | TYPE_ALLOC (ftype, nparams * sizeof (struct field)); |
| 3063 | |
| 3064 | child_die = die->next; |
| 3065 | while (child_die && child_die->tag) |
| 3066 | { |
| 3067 | if (child_die->tag == DW_TAG_formal_parameter) |
| 3068 | { |
| 3069 | /* Dwarf2 has no clean way to discern C++ static and non-static |
| 3070 | member functions. G++ helps GDB by marking the first |
| 3071 | parameter for non-static member functions (which is the |
| 3072 | this pointer) as artificial. We pass this information |
| 3073 | to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */ |
| 3074 | attr = dwarf_attr (child_die, DW_AT_artificial); |
| 3075 | if (attr) |
| 3076 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); |
| 3077 | else |
| 3078 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
| 3079 | TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, objfile, |
| 3080 | cu_header); |
| 3081 | iparams++; |
| 3082 | } |
| 3083 | child_die = sibling_die (child_die); |
| 3084 | } |
| 3085 | } |
| 3086 | |
| 3087 | die->type = ftype; |
| 3088 | } |
| 3089 | |
| 3090 | static void |
| 3091 | read_typedef (struct die_info *die, struct objfile *objfile, |
| 3092 | const struct comp_unit_head *cu_header) |
| 3093 | { |
| 3094 | struct attribute *attr; |
| 3095 | char *name = NULL; |
| 3096 | |
| 3097 | if (!die->type) |
| 3098 | { |
| 3099 | attr = dwarf_attr (die, DW_AT_name); |
| 3100 | if (attr && DW_STRING (attr)) |
| 3101 | { |
| 3102 | name = DW_STRING (attr); |
| 3103 | } |
| 3104 | die->type = init_type (TYPE_CODE_TYPEDEF, 0, TYPE_FLAG_TARGET_STUB, name, objfile); |
| 3105 | TYPE_TARGET_TYPE (die->type) = die_type (die, objfile, cu_header); |
| 3106 | } |
| 3107 | } |
| 3108 | |
| 3109 | /* Find a representation of a given base type and install |
| 3110 | it in the TYPE field of the die. */ |
| 3111 | |
| 3112 | static void |
| 3113 | read_base_type (struct die_info *die, struct objfile *objfile) |
| 3114 | { |
| 3115 | struct type *type; |
| 3116 | struct attribute *attr; |
| 3117 | int encoding = 0, size = 0; |
| 3118 | |
| 3119 | /* If we've already decoded this die, this is a no-op. */ |
| 3120 | if (die->type) |
| 3121 | { |
| 3122 | return; |
| 3123 | } |
| 3124 | |
| 3125 | attr = dwarf_attr (die, DW_AT_encoding); |
| 3126 | if (attr) |
| 3127 | { |
| 3128 | encoding = DW_UNSND (attr); |
| 3129 | } |
| 3130 | attr = dwarf_attr (die, DW_AT_byte_size); |
| 3131 | if (attr) |
| 3132 | { |
| 3133 | size = DW_UNSND (attr); |
| 3134 | } |
| 3135 | attr = dwarf_attr (die, DW_AT_name); |
| 3136 | if (attr && DW_STRING (attr)) |
| 3137 | { |
| 3138 | enum type_code code = TYPE_CODE_INT; |
| 3139 | int type_flags = 0; |
| 3140 | |
| 3141 | switch (encoding) |
| 3142 | { |
| 3143 | case DW_ATE_address: |
| 3144 | /* Turn DW_ATE_address into a void * pointer. */ |
| 3145 | code = TYPE_CODE_PTR; |
| 3146 | type_flags |= TYPE_FLAG_UNSIGNED; |
| 3147 | break; |
| 3148 | case DW_ATE_boolean: |
| 3149 | code = TYPE_CODE_BOOL; |
| 3150 | type_flags |= TYPE_FLAG_UNSIGNED; |
| 3151 | break; |
| 3152 | case DW_ATE_complex_float: |
| 3153 | code = TYPE_CODE_COMPLEX; |
| 3154 | break; |
| 3155 | case DW_ATE_float: |
| 3156 | code = TYPE_CODE_FLT; |
| 3157 | break; |
| 3158 | case DW_ATE_signed: |
| 3159 | case DW_ATE_signed_char: |
| 3160 | break; |
| 3161 | case DW_ATE_unsigned: |
| 3162 | case DW_ATE_unsigned_char: |
| 3163 | type_flags |= TYPE_FLAG_UNSIGNED; |
| 3164 | break; |
| 3165 | default: |
| 3166 | complain (&dwarf2_unsupported_at_encoding, |
| 3167 | dwarf_type_encoding_name (encoding)); |
| 3168 | break; |
| 3169 | } |
| 3170 | type = init_type (code, size, type_flags, DW_STRING (attr), objfile); |
| 3171 | if (encoding == DW_ATE_address) |
| 3172 | TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID); |
| 3173 | else if (encoding == DW_ATE_complex_float) |
| 3174 | { |
| 3175 | if (size == 32) |
| 3176 | TYPE_TARGET_TYPE (type) |
| 3177 | = dwarf2_fundamental_type (objfile, FT_EXT_PREC_FLOAT); |
| 3178 | else if (size == 16) |
| 3179 | TYPE_TARGET_TYPE (type) |
| 3180 | = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT); |
| 3181 | else if (size == 8) |
| 3182 | TYPE_TARGET_TYPE (type) |
| 3183 | = dwarf2_fundamental_type (objfile, FT_FLOAT); |
| 3184 | } |
| 3185 | } |
| 3186 | else |
| 3187 | { |
| 3188 | type = dwarf_base_type (encoding, size, objfile); |
| 3189 | } |
| 3190 | die->type = type; |
| 3191 | } |
| 3192 | |
| 3193 | /* Read a whole compilation unit into a linked list of dies. */ |
| 3194 | |
| 3195 | static struct die_info * |
| 3196 | read_comp_unit (char *info_ptr, bfd *abfd, |
| 3197 | const struct comp_unit_head *cu_header) |
| 3198 | { |
| 3199 | struct die_info *first_die, *last_die, *die; |
| 3200 | char *cur_ptr; |
| 3201 | int nesting_level; |
| 3202 | |
| 3203 | /* Reset die reference table; we are |
| 3204 | building new ones now. */ |
| 3205 | dwarf2_empty_hash_tables (); |
| 3206 | |
| 3207 | cur_ptr = info_ptr; |
| 3208 | nesting_level = 0; |
| 3209 | first_die = last_die = NULL; |
| 3210 | do |
| 3211 | { |
| 3212 | cur_ptr = read_full_die (&die, abfd, cur_ptr, cu_header); |
| 3213 | if (die->has_children) |
| 3214 | { |
| 3215 | nesting_level++; |
| 3216 | } |
| 3217 | if (die->tag == 0) |
| 3218 | { |
| 3219 | nesting_level--; |
| 3220 | } |
| 3221 | |
| 3222 | die->next = NULL; |
| 3223 | |
| 3224 | /* Enter die in reference hash table */ |
| 3225 | store_in_ref_table (die->offset, die); |
| 3226 | |
| 3227 | if (!first_die) |
| 3228 | { |
| 3229 | first_die = last_die = die; |
| 3230 | } |
| 3231 | else |
| 3232 | { |
| 3233 | last_die->next = die; |
| 3234 | last_die = die; |
| 3235 | } |
| 3236 | } |
| 3237 | while (nesting_level > 0); |
| 3238 | return first_die; |
| 3239 | } |
| 3240 | |
| 3241 | /* Free a linked list of dies. */ |
| 3242 | |
| 3243 | static void |
| 3244 | free_die_list (struct die_info *dies) |
| 3245 | { |
| 3246 | struct die_info *die, *next; |
| 3247 | |
| 3248 | die = dies; |
| 3249 | while (die) |
| 3250 | { |
| 3251 | next = die->next; |
| 3252 | xfree (die->attrs); |
| 3253 | xfree (die); |
| 3254 | die = next; |
| 3255 | } |
| 3256 | } |
| 3257 | |
| 3258 | static void |
| 3259 | do_free_die_list_cleanup (void *dies) |
| 3260 | { |
| 3261 | free_die_list (dies); |
| 3262 | } |
| 3263 | |
| 3264 | static struct cleanup * |
| 3265 | make_cleanup_free_die_list (struct die_info *dies) |
| 3266 | { |
| 3267 | return make_cleanup (do_free_die_list_cleanup, dies); |
| 3268 | } |
| 3269 | |
| 3270 | |
| 3271 | /* Read the contents of the section at OFFSET and of size SIZE from the |
| 3272 | object file specified by OBJFILE into the psymbol_obstack and return it. */ |
| 3273 | |
| 3274 | char * |
| 3275 | dwarf2_read_section (struct objfile *objfile, file_ptr offset, |
| 3276 | unsigned int size) |
| 3277 | { |
| 3278 | bfd *abfd = objfile->obfd; |
| 3279 | char *buf; |
| 3280 | |
| 3281 | if (size == 0) |
| 3282 | return NULL; |
| 3283 | |
| 3284 | buf = (char *) obstack_alloc (&objfile->psymbol_obstack, size); |
| 3285 | if ((bfd_seek (abfd, offset, SEEK_SET) != 0) || |
| 3286 | (bfd_bread (buf, size, abfd) != size)) |
| 3287 | { |
| 3288 | buf = NULL; |
| 3289 | error ("Dwarf Error: Can't read DWARF data from '%s'", |
| 3290 | bfd_get_filename (abfd)); |
| 3291 | } |
| 3292 | return buf; |
| 3293 | } |
| 3294 | |
| 3295 | /* In DWARF version 2, the description of the debugging information is |
| 3296 | stored in a separate .debug_abbrev section. Before we read any |
| 3297 | dies from a section we read in all abbreviations and install them |
| 3298 | in a hash table. */ |
| 3299 | |
| 3300 | static void |
| 3301 | dwarf2_read_abbrevs (bfd *abfd, unsigned int offset) |
| 3302 | { |
| 3303 | char *abbrev_ptr; |
| 3304 | struct abbrev_info *cur_abbrev; |
| 3305 | unsigned int abbrev_number, bytes_read, abbrev_name; |
| 3306 | unsigned int abbrev_form, hash_number; |
| 3307 | |
| 3308 | /* empty the table */ |
| 3309 | dwarf2_empty_abbrev_table (NULL); |
| 3310 | |
| 3311 | abbrev_ptr = dwarf_abbrev_buffer + offset; |
| 3312 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3313 | abbrev_ptr += bytes_read; |
| 3314 | |
| 3315 | /* loop until we reach an abbrev number of 0 */ |
| 3316 | while (abbrev_number) |
| 3317 | { |
| 3318 | cur_abbrev = dwarf_alloc_abbrev (); |
| 3319 | |
| 3320 | /* read in abbrev header */ |
| 3321 | cur_abbrev->number = abbrev_number; |
| 3322 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3323 | abbrev_ptr += bytes_read; |
| 3324 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); |
| 3325 | abbrev_ptr += 1; |
| 3326 | |
| 3327 | /* now read in declarations */ |
| 3328 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3329 | abbrev_ptr += bytes_read; |
| 3330 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3331 | abbrev_ptr += bytes_read; |
| 3332 | while (abbrev_name) |
| 3333 | { |
| 3334 | if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0) |
| 3335 | { |
| 3336 | cur_abbrev->attrs = (struct attr_abbrev *) |
| 3337 | xrealloc (cur_abbrev->attrs, |
| 3338 | (cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK) |
| 3339 | * sizeof (struct attr_abbrev)); |
| 3340 | } |
| 3341 | cur_abbrev->attrs[cur_abbrev->num_attrs].name = abbrev_name; |
| 3342 | cur_abbrev->attrs[cur_abbrev->num_attrs++].form = abbrev_form; |
| 3343 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3344 | abbrev_ptr += bytes_read; |
| 3345 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3346 | abbrev_ptr += bytes_read; |
| 3347 | } |
| 3348 | |
| 3349 | hash_number = abbrev_number % ABBREV_HASH_SIZE; |
| 3350 | cur_abbrev->next = dwarf2_abbrevs[hash_number]; |
| 3351 | dwarf2_abbrevs[hash_number] = cur_abbrev; |
| 3352 | |
| 3353 | /* Get next abbreviation. |
| 3354 | Under Irix6 the abbreviations for a compilation unit are not |
| 3355 | always properly terminated with an abbrev number of 0. |
| 3356 | Exit loop if we encounter an abbreviation which we have |
| 3357 | already read (which means we are about to read the abbreviations |
| 3358 | for the next compile unit) or if the end of the abbreviation |
| 3359 | table is reached. */ |
| 3360 | if ((unsigned int) (abbrev_ptr - dwarf_abbrev_buffer) |
| 3361 | >= dwarf_abbrev_size) |
| 3362 | break; |
| 3363 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3364 | abbrev_ptr += bytes_read; |
| 3365 | if (dwarf2_lookup_abbrev (abbrev_number) != NULL) |
| 3366 | break; |
| 3367 | } |
| 3368 | } |
| 3369 | |
| 3370 | /* Empty the abbrev table for a new compilation unit. */ |
| 3371 | |
| 3372 | /* ARGSUSED */ |
| 3373 | static void |
| 3374 | dwarf2_empty_abbrev_table (PTR ignore) |
| 3375 | { |
| 3376 | int i; |
| 3377 | struct abbrev_info *abbrev, *next; |
| 3378 | |
| 3379 | for (i = 0; i < ABBREV_HASH_SIZE; ++i) |
| 3380 | { |
| 3381 | next = NULL; |
| 3382 | abbrev = dwarf2_abbrevs[i]; |
| 3383 | while (abbrev) |
| 3384 | { |
| 3385 | next = abbrev->next; |
| 3386 | xfree (abbrev->attrs); |
| 3387 | xfree (abbrev); |
| 3388 | abbrev = next; |
| 3389 | } |
| 3390 | dwarf2_abbrevs[i] = NULL; |
| 3391 | } |
| 3392 | } |
| 3393 | |
| 3394 | /* Lookup an abbrev_info structure in the abbrev hash table. */ |
| 3395 | |
| 3396 | static struct abbrev_info * |
| 3397 | dwarf2_lookup_abbrev (unsigned int number) |
| 3398 | { |
| 3399 | unsigned int hash_number; |
| 3400 | struct abbrev_info *abbrev; |
| 3401 | |
| 3402 | hash_number = number % ABBREV_HASH_SIZE; |
| 3403 | abbrev = dwarf2_abbrevs[hash_number]; |
| 3404 | |
| 3405 | while (abbrev) |
| 3406 | { |
| 3407 | if (abbrev->number == number) |
| 3408 | return abbrev; |
| 3409 | else |
| 3410 | abbrev = abbrev->next; |
| 3411 | } |
| 3412 | return NULL; |
| 3413 | } |
| 3414 | |
| 3415 | /* Read a minimal amount of information into the minimal die structure. */ |
| 3416 | |
| 3417 | static char * |
| 3418 | read_partial_die (struct partial_die_info *part_die, bfd *abfd, |
| 3419 | char *info_ptr, const struct comp_unit_head *cu_header) |
| 3420 | { |
| 3421 | unsigned int abbrev_number, bytes_read, i; |
| 3422 | struct abbrev_info *abbrev; |
| 3423 | struct attribute attr; |
| 3424 | struct attribute spec_attr; |
| 3425 | int found_spec_attr = 0; |
| 3426 | int has_low_pc_attr = 0; |
| 3427 | int has_high_pc_attr = 0; |
| 3428 | |
| 3429 | *part_die = zeroed_partial_die; |
| 3430 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 3431 | info_ptr += bytes_read; |
| 3432 | if (!abbrev_number) |
| 3433 | return info_ptr; |
| 3434 | |
| 3435 | abbrev = dwarf2_lookup_abbrev (abbrev_number); |
| 3436 | if (!abbrev) |
| 3437 | { |
| 3438 | error ("Dwarf Error: Could not find abbrev number %d.", abbrev_number); |
| 3439 | } |
| 3440 | part_die->offset = info_ptr - dwarf_info_buffer; |
| 3441 | part_die->tag = abbrev->tag; |
| 3442 | part_die->has_children = abbrev->has_children; |
| 3443 | part_die->abbrev = abbrev_number; |
| 3444 | |
| 3445 | for (i = 0; i < abbrev->num_attrs; ++i) |
| 3446 | { |
| 3447 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, |
| 3448 | info_ptr, cu_header); |
| 3449 | |
| 3450 | /* Store the data if it is of an attribute we want to keep in a |
| 3451 | partial symbol table. */ |
| 3452 | switch (attr.name) |
| 3453 | { |
| 3454 | case DW_AT_name: |
| 3455 | |
| 3456 | /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */ |
| 3457 | if (part_die->name == NULL) |
| 3458 | part_die->name = DW_STRING (&attr); |
| 3459 | break; |
| 3460 | case DW_AT_MIPS_linkage_name: |
| 3461 | part_die->name = DW_STRING (&attr); |
| 3462 | break; |
| 3463 | case DW_AT_low_pc: |
| 3464 | has_low_pc_attr = 1; |
| 3465 | part_die->lowpc = DW_ADDR (&attr); |
| 3466 | break; |
| 3467 | case DW_AT_high_pc: |
| 3468 | has_high_pc_attr = 1; |
| 3469 | part_die->highpc = DW_ADDR (&attr); |
| 3470 | break; |
| 3471 | case DW_AT_location: |
| 3472 | part_die->locdesc = DW_BLOCK (&attr); |
| 3473 | break; |
| 3474 | case DW_AT_language: |
| 3475 | part_die->language = DW_UNSND (&attr); |
| 3476 | break; |
| 3477 | case DW_AT_external: |
| 3478 | part_die->is_external = DW_UNSND (&attr); |
| 3479 | break; |
| 3480 | case DW_AT_declaration: |
| 3481 | part_die->is_declaration = DW_UNSND (&attr); |
| 3482 | break; |
| 3483 | case DW_AT_type: |
| 3484 | part_die->has_type = 1; |
| 3485 | break; |
| 3486 | case DW_AT_abstract_origin: |
| 3487 | case DW_AT_specification: |
| 3488 | found_spec_attr = 1; |
| 3489 | spec_attr = attr; |
| 3490 | break; |
| 3491 | case DW_AT_sibling: |
| 3492 | /* Ignore absolute siblings, they might point outside of |
| 3493 | the current compile unit. */ |
| 3494 | if (attr.form == DW_FORM_ref_addr) |
| 3495 | complain (&dwarf2_absolute_sibling_complaint); |
| 3496 | else |
| 3497 | part_die->sibling = |
| 3498 | dwarf_info_buffer + dwarf2_get_ref_die_offset (&attr); |
| 3499 | break; |
| 3500 | default: |
| 3501 | break; |
| 3502 | } |
| 3503 | } |
| 3504 | |
| 3505 | /* If we found a reference attribute and the die has no name, try |
| 3506 | to find a name in the referred to die. */ |
| 3507 | |
| 3508 | if (found_spec_attr && part_die->name == NULL) |
| 3509 | { |
| 3510 | struct partial_die_info spec_die; |
| 3511 | char *spec_ptr; |
| 3512 | int dummy; |
| 3513 | |
| 3514 | spec_ptr = dwarf_info_buffer + dwarf2_get_ref_die_offset (&spec_attr); |
| 3515 | read_partial_die (&spec_die, abfd, spec_ptr, cu_header); |
| 3516 | if (spec_die.name) |
| 3517 | { |
| 3518 | part_die->name = spec_die.name; |
| 3519 | |
| 3520 | /* Copy DW_AT_external attribute if it is set. */ |
| 3521 | if (spec_die.is_external) |
| 3522 | part_die->is_external = spec_die.is_external; |
| 3523 | } |
| 3524 | } |
| 3525 | |
| 3526 | /* When using the GNU linker, .gnu.linkonce. sections are used to |
| 3527 | eliminate duplicate copies of functions and vtables and such. |
| 3528 | The linker will arbitrarily choose one and discard the others. |
| 3529 | The AT_*_pc values for such functions refer to local labels in |
| 3530 | these sections. If the section from that file was discarded, the |
| 3531 | labels are not in the output, so the relocs get a value of 0. |
| 3532 | If this is a discarded function, mark the pc bounds as invalid, |
| 3533 | so that GDB will ignore it. */ |
| 3534 | if (has_low_pc_attr && has_high_pc_attr |
| 3535 | && part_die->lowpc < part_die->highpc |
| 3536 | && (part_die->lowpc != 0 |
| 3537 | || (bfd_get_file_flags (abfd) & HAS_RELOC))) |
| 3538 | part_die->has_pc_info = 1; |
| 3539 | return info_ptr; |
| 3540 | } |
| 3541 | |
| 3542 | /* Read the die from the .debug_info section buffer. And set diep to |
| 3543 | point to a newly allocated die with its information. */ |
| 3544 | |
| 3545 | static char * |
| 3546 | read_full_die (struct die_info **diep, bfd *abfd, char *info_ptr, |
| 3547 | const struct comp_unit_head *cu_header) |
| 3548 | { |
| 3549 | unsigned int abbrev_number, bytes_read, i, offset; |
| 3550 | struct abbrev_info *abbrev; |
| 3551 | struct die_info *die; |
| 3552 | |
| 3553 | offset = info_ptr - dwarf_info_buffer; |
| 3554 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 3555 | info_ptr += bytes_read; |
| 3556 | if (!abbrev_number) |
| 3557 | { |
| 3558 | die = dwarf_alloc_die (); |
| 3559 | die->tag = 0; |
| 3560 | die->abbrev = abbrev_number; |
| 3561 | die->type = NULL; |
| 3562 | *diep = die; |
| 3563 | return info_ptr; |
| 3564 | } |
| 3565 | |
| 3566 | abbrev = dwarf2_lookup_abbrev (abbrev_number); |
| 3567 | if (!abbrev) |
| 3568 | { |
| 3569 | error ("Dwarf Error: could not find abbrev number %d.", abbrev_number); |
| 3570 | } |
| 3571 | die = dwarf_alloc_die (); |
| 3572 | die->offset = offset; |
| 3573 | die->tag = abbrev->tag; |
| 3574 | die->has_children = abbrev->has_children; |
| 3575 | die->abbrev = abbrev_number; |
| 3576 | die->type = NULL; |
| 3577 | |
| 3578 | die->num_attrs = abbrev->num_attrs; |
| 3579 | die->attrs = (struct attribute *) |
| 3580 | xmalloc (die->num_attrs * sizeof (struct attribute)); |
| 3581 | |
| 3582 | for (i = 0; i < abbrev->num_attrs; ++i) |
| 3583 | { |
| 3584 | info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i], |
| 3585 | abfd, info_ptr, cu_header); |
| 3586 | } |
| 3587 | |
| 3588 | *diep = die; |
| 3589 | return info_ptr; |
| 3590 | } |
| 3591 | |
| 3592 | /* Read an attribute value described by an attribute form. */ |
| 3593 | |
| 3594 | static char * |
| 3595 | read_attribute_value (struct attribute *attr, unsigned form, |
| 3596 | bfd *abfd, char *info_ptr, |
| 3597 | const struct comp_unit_head *cu_header) |
| 3598 | { |
| 3599 | unsigned int bytes_read; |
| 3600 | struct dwarf_block *blk; |
| 3601 | |
| 3602 | attr->form = form; |
| 3603 | switch (form) |
| 3604 | { |
| 3605 | case DW_FORM_addr: |
| 3606 | case DW_FORM_ref_addr: |
| 3607 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu_header, &bytes_read); |
| 3608 | info_ptr += bytes_read; |
| 3609 | break; |
| 3610 | case DW_FORM_block2: |
| 3611 | blk = dwarf_alloc_block (); |
| 3612 | blk->size = read_2_bytes (abfd, info_ptr); |
| 3613 | info_ptr += 2; |
| 3614 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 3615 | info_ptr += blk->size; |
| 3616 | DW_BLOCK (attr) = blk; |
| 3617 | break; |
| 3618 | case DW_FORM_block4: |
| 3619 | blk = dwarf_alloc_block (); |
| 3620 | blk->size = read_4_bytes (abfd, info_ptr); |
| 3621 | info_ptr += 4; |
| 3622 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 3623 | info_ptr += blk->size; |
| 3624 | DW_BLOCK (attr) = blk; |
| 3625 | break; |
| 3626 | case DW_FORM_data2: |
| 3627 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); |
| 3628 | info_ptr += 2; |
| 3629 | break; |
| 3630 | case DW_FORM_data4: |
| 3631 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); |
| 3632 | info_ptr += 4; |
| 3633 | break; |
| 3634 | case DW_FORM_data8: |
| 3635 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); |
| 3636 | info_ptr += 8; |
| 3637 | break; |
| 3638 | case DW_FORM_string: |
| 3639 | DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read); |
| 3640 | info_ptr += bytes_read; |
| 3641 | break; |
| 3642 | case DW_FORM_strp: |
| 3643 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, |
| 3644 | &bytes_read); |
| 3645 | info_ptr += bytes_read; |
| 3646 | break; |
| 3647 | case DW_FORM_block: |
| 3648 | blk = dwarf_alloc_block (); |
| 3649 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 3650 | info_ptr += bytes_read; |
| 3651 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 3652 | info_ptr += blk->size; |
| 3653 | DW_BLOCK (attr) = blk; |
| 3654 | break; |
| 3655 | case DW_FORM_block1: |
| 3656 | blk = dwarf_alloc_block (); |
| 3657 | blk->size = read_1_byte (abfd, info_ptr); |
| 3658 | info_ptr += 1; |
| 3659 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 3660 | info_ptr += blk->size; |
| 3661 | DW_BLOCK (attr) = blk; |
| 3662 | break; |
| 3663 | case DW_FORM_data1: |
| 3664 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); |
| 3665 | info_ptr += 1; |
| 3666 | break; |
| 3667 | case DW_FORM_flag: |
| 3668 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); |
| 3669 | info_ptr += 1; |
| 3670 | break; |
| 3671 | case DW_FORM_sdata: |
| 3672 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); |
| 3673 | info_ptr += bytes_read; |
| 3674 | break; |
| 3675 | case DW_FORM_udata: |
| 3676 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 3677 | info_ptr += bytes_read; |
| 3678 | break; |
| 3679 | case DW_FORM_ref1: |
| 3680 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); |
| 3681 | info_ptr += 1; |
| 3682 | break; |
| 3683 | case DW_FORM_ref2: |
| 3684 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); |
| 3685 | info_ptr += 2; |
| 3686 | break; |
| 3687 | case DW_FORM_ref4: |
| 3688 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); |
| 3689 | info_ptr += 4; |
| 3690 | break; |
| 3691 | case DW_FORM_ref8: |
| 3692 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); |
| 3693 | info_ptr += 8; |
| 3694 | break; |
| 3695 | case DW_FORM_ref_udata: |
| 3696 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 3697 | info_ptr += bytes_read; |
| 3698 | break; |
| 3699 | case DW_FORM_indirect: |
| 3700 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 3701 | info_ptr += bytes_read; |
| 3702 | info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu_header); |
| 3703 | break; |
| 3704 | default: |
| 3705 | error ("Dwarf Error: Cannot handle %s in DWARF reader.", |
| 3706 | dwarf_form_name (form)); |
| 3707 | } |
| 3708 | return info_ptr; |
| 3709 | } |
| 3710 | |
| 3711 | /* Read an attribute described by an abbreviated attribute. */ |
| 3712 | |
| 3713 | static char * |
| 3714 | read_attribute (struct attribute *attr, struct attr_abbrev *abbrev, |
| 3715 | bfd *abfd, char *info_ptr, |
| 3716 | const struct comp_unit_head *cu_header) |
| 3717 | { |
| 3718 | attr->name = abbrev->name; |
| 3719 | return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu_header); |
| 3720 | } |
| 3721 | |
| 3722 | /* read dwarf information from a buffer */ |
| 3723 | |
| 3724 | static unsigned int |
| 3725 | read_1_byte (bfd *abfd, char *buf) |
| 3726 | { |
| 3727 | return bfd_get_8 (abfd, (bfd_byte *) buf); |
| 3728 | } |
| 3729 | |
| 3730 | static int |
| 3731 | read_1_signed_byte (bfd *abfd, char *buf) |
| 3732 | { |
| 3733 | return bfd_get_signed_8 (abfd, (bfd_byte *) buf); |
| 3734 | } |
| 3735 | |
| 3736 | static unsigned int |
| 3737 | read_2_bytes (bfd *abfd, char *buf) |
| 3738 | { |
| 3739 | return bfd_get_16 (abfd, (bfd_byte *) buf); |
| 3740 | } |
| 3741 | |
| 3742 | static int |
| 3743 | read_2_signed_bytes (bfd *abfd, char *buf) |
| 3744 | { |
| 3745 | return bfd_get_signed_16 (abfd, (bfd_byte *) buf); |
| 3746 | } |
| 3747 | |
| 3748 | static unsigned int |
| 3749 | read_4_bytes (bfd *abfd, char *buf) |
| 3750 | { |
| 3751 | return bfd_get_32 (abfd, (bfd_byte *) buf); |
| 3752 | } |
| 3753 | |
| 3754 | static int |
| 3755 | read_4_signed_bytes (bfd *abfd, char *buf) |
| 3756 | { |
| 3757 | return bfd_get_signed_32 (abfd, (bfd_byte *) buf); |
| 3758 | } |
| 3759 | |
| 3760 | static unsigned long |
| 3761 | read_8_bytes (bfd *abfd, char *buf) |
| 3762 | { |
| 3763 | return bfd_get_64 (abfd, (bfd_byte *) buf); |
| 3764 | } |
| 3765 | |
| 3766 | static CORE_ADDR |
| 3767 | read_address (bfd *abfd, char *buf, const struct comp_unit_head *cu_header, |
| 3768 | int *bytes_read) |
| 3769 | { |
| 3770 | CORE_ADDR retval = 0; |
| 3771 | |
| 3772 | if (cu_header->signed_addr_p) |
| 3773 | { |
| 3774 | switch (cu_header->addr_size) |
| 3775 | { |
| 3776 | case 2: |
| 3777 | retval = bfd_get_signed_16 (abfd, (bfd_byte *) buf); |
| 3778 | break; |
| 3779 | case 4: |
| 3780 | retval = bfd_get_signed_32 (abfd, (bfd_byte *) buf); |
| 3781 | break; |
| 3782 | case 8: |
| 3783 | retval = bfd_get_signed_64 (abfd, (bfd_byte *) buf); |
| 3784 | break; |
| 3785 | default: |
| 3786 | internal_error (__FILE__, __LINE__, |
| 3787 | "read_address: bad switch, signed"); |
| 3788 | } |
| 3789 | } |
| 3790 | else |
| 3791 | { |
| 3792 | switch (cu_header->addr_size) |
| 3793 | { |
| 3794 | case 2: |
| 3795 | retval = bfd_get_16 (abfd, (bfd_byte *) buf); |
| 3796 | break; |
| 3797 | case 4: |
| 3798 | retval = bfd_get_32 (abfd, (bfd_byte *) buf); |
| 3799 | break; |
| 3800 | case 8: |
| 3801 | retval = bfd_get_64 (abfd, (bfd_byte *) buf); |
| 3802 | break; |
| 3803 | default: |
| 3804 | internal_error (__FILE__, __LINE__, |
| 3805 | "read_address: bad switch, unsigned"); |
| 3806 | } |
| 3807 | } |
| 3808 | |
| 3809 | *bytes_read = cu_header->addr_size; |
| 3810 | return retval; |
| 3811 | } |
| 3812 | |
| 3813 | /* Reads the initial length from a section. The (draft) DWARF 2.1 |
| 3814 | specification allows the initial length to take up either 4 bytes |
| 3815 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 |
| 3816 | bytes describe the length and all offsets will be 8 bytes in length |
| 3817 | instead of 4. |
| 3818 | |
| 3819 | The value returned via bytes_read should be used to increment |
| 3820 | the relevant pointer after calling read_initial_length(). |
| 3821 | |
| 3822 | As a side effect, this function sets the fields initial_length_size |
| 3823 | and offset_size in cu_header to the values appropriate for the |
| 3824 | length field. (The format of the initial length field determines |
| 3825 | the width of file offsets to be fetched later with fetch_offset().) |
| 3826 | |
| 3827 | [ Note: read_initial_length() and read_offset() are based on the |
| 3828 | document entitled "DWARF Debugging Information Format", revision |
| 3829 | 2.1, draft 4, dated July 20, 2000. This document was obtained |
| 3830 | from: |
| 3831 | |
| 3832 | http://reality.sgi.com/dehnert_engr/dwarf/dwarf2p1-draft4-000720.pdf |
| 3833 | |
| 3834 | This document is only a draft and is subject to change. (So beware.) |
| 3835 | |
| 3836 | - Kevin, Aug 4, 2000 |
| 3837 | ] */ |
| 3838 | |
| 3839 | static LONGEST |
| 3840 | read_initial_length (bfd *abfd, char *buf, struct comp_unit_head *cu_header, |
| 3841 | int *bytes_read) |
| 3842 | { |
| 3843 | LONGEST retval = 0; |
| 3844 | |
| 3845 | retval = bfd_get_32 (abfd, (bfd_byte *) buf); |
| 3846 | |
| 3847 | if (retval == 0xffffffff) |
| 3848 | { |
| 3849 | retval = bfd_get_64 (abfd, (bfd_byte *) buf + 4); |
| 3850 | *bytes_read = 12; |
| 3851 | if (cu_header != NULL) |
| 3852 | { |
| 3853 | cu_header->initial_length_size = 12; |
| 3854 | cu_header->offset_size = 8; |
| 3855 | } |
| 3856 | } |
| 3857 | else |
| 3858 | { |
| 3859 | *bytes_read = 4; |
| 3860 | if (cu_header != NULL) |
| 3861 | { |
| 3862 | cu_header->initial_length_size = 4; |
| 3863 | cu_header->offset_size = 4; |
| 3864 | } |
| 3865 | } |
| 3866 | |
| 3867 | return retval; |
| 3868 | } |
| 3869 | |
| 3870 | /* Read an offset from the data stream. The size of the offset is |
| 3871 | given by cu_header->offset_size. */ |
| 3872 | |
| 3873 | static LONGEST |
| 3874 | read_offset (bfd *abfd, char *buf, const struct comp_unit_head *cu_header, |
| 3875 | int *bytes_read) |
| 3876 | { |
| 3877 | LONGEST retval = 0; |
| 3878 | |
| 3879 | switch (cu_header->offset_size) |
| 3880 | { |
| 3881 | case 4: |
| 3882 | retval = bfd_get_32 (abfd, (bfd_byte *) buf); |
| 3883 | *bytes_read = 4; |
| 3884 | break; |
| 3885 | case 8: |
| 3886 | retval = bfd_get_64 (abfd, (bfd_byte *) buf); |
| 3887 | *bytes_read = 8; |
| 3888 | break; |
| 3889 | default: |
| 3890 | internal_error (__FILE__, __LINE__, |
| 3891 | "read_offset: bad switch"); |
| 3892 | } |
| 3893 | |
| 3894 | return retval; |
| 3895 | } |
| 3896 | |
| 3897 | static char * |
| 3898 | read_n_bytes (bfd *abfd, char *buf, unsigned int size) |
| 3899 | { |
| 3900 | /* If the size of a host char is 8 bits, we can return a pointer |
| 3901 | to the buffer, otherwise we have to copy the data to a buffer |
| 3902 | allocated on the temporary obstack. */ |
| 3903 | gdb_assert (HOST_CHAR_BIT == 8); |
| 3904 | return buf; |
| 3905 | } |
| 3906 | |
| 3907 | static char * |
| 3908 | read_string (bfd *abfd, char *buf, unsigned int *bytes_read_ptr) |
| 3909 | { |
| 3910 | /* If the size of a host char is 8 bits, we can return a pointer |
| 3911 | to the string, otherwise we have to copy the string to a buffer |
| 3912 | allocated on the temporary obstack. */ |
| 3913 | gdb_assert (HOST_CHAR_BIT == 8); |
| 3914 | if (*buf == '\0') |
| 3915 | { |
| 3916 | *bytes_read_ptr = 1; |
| 3917 | return NULL; |
| 3918 | } |
| 3919 | *bytes_read_ptr = strlen (buf) + 1; |
| 3920 | return buf; |
| 3921 | } |
| 3922 | |
| 3923 | static char * |
| 3924 | read_indirect_string (bfd *abfd, char *buf, |
| 3925 | const struct comp_unit_head *cu_header, |
| 3926 | unsigned int *bytes_read_ptr) |
| 3927 | { |
| 3928 | LONGEST str_offset = read_offset (abfd, buf, cu_header, |
| 3929 | (int *) bytes_read_ptr); |
| 3930 | |
| 3931 | if (dwarf_str_buffer == NULL) |
| 3932 | { |
| 3933 | error ("DW_FORM_strp used without .debug_str section"); |
| 3934 | return NULL; |
| 3935 | } |
| 3936 | if (str_offset >= dwarf_str_size) |
| 3937 | { |
| 3938 | error ("DW_FORM_strp pointing outside of .debug_str section"); |
| 3939 | return NULL; |
| 3940 | } |
| 3941 | gdb_assert (HOST_CHAR_BIT == 8); |
| 3942 | if (dwarf_str_buffer[str_offset] == '\0') |
| 3943 | return NULL; |
| 3944 | return dwarf_str_buffer + str_offset; |
| 3945 | } |
| 3946 | |
| 3947 | static unsigned long |
| 3948 | read_unsigned_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr) |
| 3949 | { |
| 3950 | unsigned long result; |
| 3951 | unsigned int num_read; |
| 3952 | int i, shift; |
| 3953 | unsigned char byte; |
| 3954 | |
| 3955 | result = 0; |
| 3956 | shift = 0; |
| 3957 | num_read = 0; |
| 3958 | i = 0; |
| 3959 | while (1) |
| 3960 | { |
| 3961 | byte = bfd_get_8 (abfd, (bfd_byte *) buf); |
| 3962 | buf++; |
| 3963 | num_read++; |
| 3964 | result |= ((unsigned long)(byte & 127) << shift); |
| 3965 | if ((byte & 128) == 0) |
| 3966 | { |
| 3967 | break; |
| 3968 | } |
| 3969 | shift += 7; |
| 3970 | } |
| 3971 | *bytes_read_ptr = num_read; |
| 3972 | return result; |
| 3973 | } |
| 3974 | |
| 3975 | static long |
| 3976 | read_signed_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr) |
| 3977 | { |
| 3978 | long result; |
| 3979 | int i, shift, size, num_read; |
| 3980 | unsigned char byte; |
| 3981 | |
| 3982 | result = 0; |
| 3983 | shift = 0; |
| 3984 | size = 32; |
| 3985 | num_read = 0; |
| 3986 | i = 0; |
| 3987 | while (1) |
| 3988 | { |
| 3989 | byte = bfd_get_8 (abfd, (bfd_byte *) buf); |
| 3990 | buf++; |
| 3991 | num_read++; |
| 3992 | result |= ((long)(byte & 127) << shift); |
| 3993 | shift += 7; |
| 3994 | if ((byte & 128) == 0) |
| 3995 | { |
| 3996 | break; |
| 3997 | } |
| 3998 | } |
| 3999 | if ((shift < size) && (byte & 0x40)) |
| 4000 | { |
| 4001 | result |= -(1 << shift); |
| 4002 | } |
| 4003 | *bytes_read_ptr = num_read; |
| 4004 | return result; |
| 4005 | } |
| 4006 | |
| 4007 | static void |
| 4008 | set_cu_language (unsigned int lang) |
| 4009 | { |
| 4010 | switch (lang) |
| 4011 | { |
| 4012 | case DW_LANG_C89: |
| 4013 | case DW_LANG_C: |
| 4014 | cu_language = language_c; |
| 4015 | break; |
| 4016 | case DW_LANG_C_plus_plus: |
| 4017 | cu_language = language_cplus; |
| 4018 | break; |
| 4019 | case DW_LANG_Fortran77: |
| 4020 | case DW_LANG_Fortran90: |
| 4021 | case DW_LANG_Fortran95: |
| 4022 | cu_language = language_fortran; |
| 4023 | break; |
| 4024 | case DW_LANG_Mips_Assembler: |
| 4025 | cu_language = language_asm; |
| 4026 | break; |
| 4027 | case DW_LANG_Java: |
| 4028 | cu_language = language_java; |
| 4029 | break; |
| 4030 | case DW_LANG_Ada83: |
| 4031 | case DW_LANG_Cobol74: |
| 4032 | case DW_LANG_Cobol85: |
| 4033 | case DW_LANG_Pascal83: |
| 4034 | case DW_LANG_Modula2: |
| 4035 | default: |
| 4036 | cu_language = language_unknown; |
| 4037 | break; |
| 4038 | } |
| 4039 | cu_language_defn = language_def (cu_language); |
| 4040 | } |
| 4041 | |
| 4042 | /* Return the named attribute or NULL if not there. */ |
| 4043 | |
| 4044 | static struct attribute * |
| 4045 | dwarf_attr (struct die_info *die, unsigned int name) |
| 4046 | { |
| 4047 | unsigned int i; |
| 4048 | struct attribute *spec = NULL; |
| 4049 | |
| 4050 | for (i = 0; i < die->num_attrs; ++i) |
| 4051 | { |
| 4052 | if (die->attrs[i].name == name) |
| 4053 | { |
| 4054 | return &die->attrs[i]; |
| 4055 | } |
| 4056 | if (die->attrs[i].name == DW_AT_specification |
| 4057 | || die->attrs[i].name == DW_AT_abstract_origin) |
| 4058 | spec = &die->attrs[i]; |
| 4059 | } |
| 4060 | if (spec) |
| 4061 | { |
| 4062 | struct die_info *ref_die = |
| 4063 | follow_die_ref (dwarf2_get_ref_die_offset (spec)); |
| 4064 | |
| 4065 | if (ref_die) |
| 4066 | return dwarf_attr (ref_die, name); |
| 4067 | } |
| 4068 | |
| 4069 | return NULL; |
| 4070 | } |
| 4071 | |
| 4072 | static int |
| 4073 | die_is_declaration (struct die_info *die) |
| 4074 | { |
| 4075 | return (dwarf_attr (die, DW_AT_declaration) |
| 4076 | && ! dwarf_attr (die, DW_AT_specification)); |
| 4077 | } |
| 4078 | |
| 4079 | |
| 4080 | /* Free the line_header structure *LH, and any arrays and strings it |
| 4081 | refers to. */ |
| 4082 | static void |
| 4083 | free_line_header (struct line_header *lh) |
| 4084 | { |
| 4085 | if (lh->standard_opcode_lengths) |
| 4086 | free (lh->standard_opcode_lengths); |
| 4087 | |
| 4088 | /* Remember that all the lh->file_names[i].name pointers are |
| 4089 | pointers into debug_line_buffer, and don't need to be freed. */ |
| 4090 | if (lh->file_names) |
| 4091 | free (lh->file_names); |
| 4092 | |
| 4093 | /* Similarly for the include directory names. */ |
| 4094 | if (lh->include_dirs) |
| 4095 | free (lh->include_dirs); |
| 4096 | |
| 4097 | free (lh); |
| 4098 | } |
| 4099 | |
| 4100 | |
| 4101 | /* Add an entry to LH's include directory table. */ |
| 4102 | static void |
| 4103 | add_include_dir (struct line_header *lh, char *include_dir) |
| 4104 | { |
| 4105 | /* Grow the array if necessary. */ |
| 4106 | if (lh->include_dirs_size == 0) |
| 4107 | { |
| 4108 | lh->include_dirs_size = 1; /* for testing */ |
| 4109 | lh->include_dirs = xmalloc (lh->include_dirs_size |
| 4110 | * sizeof (*lh->include_dirs)); |
| 4111 | } |
| 4112 | else if (lh->num_include_dirs >= lh->include_dirs_size) |
| 4113 | { |
| 4114 | lh->include_dirs_size *= 2; |
| 4115 | lh->include_dirs = xrealloc (lh->include_dirs, |
| 4116 | (lh->include_dirs_size |
| 4117 | * sizeof (*lh->include_dirs))); |
| 4118 | } |
| 4119 | |
| 4120 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
| 4121 | } |
| 4122 | |
| 4123 | |
| 4124 | /* Add an entry to LH's file name table. */ |
| 4125 | static void |
| 4126 | add_file_name (struct line_header *lh, |
| 4127 | char *name, |
| 4128 | unsigned int dir_index, |
| 4129 | unsigned int mod_time, |
| 4130 | unsigned int length) |
| 4131 | { |
| 4132 | struct file_entry *fe; |
| 4133 | |
| 4134 | /* Grow the array if necessary. */ |
| 4135 | if (lh->file_names_size == 0) |
| 4136 | { |
| 4137 | lh->file_names_size = 1; /* for testing */ |
| 4138 | lh->file_names = xmalloc (lh->file_names_size |
| 4139 | * sizeof (*lh->file_names)); |
| 4140 | } |
| 4141 | else if (lh->num_file_names >= lh->file_names_size) |
| 4142 | { |
| 4143 | lh->file_names_size *= 2; |
| 4144 | lh->file_names = xrealloc (lh->file_names, |
| 4145 | (lh->file_names_size |
| 4146 | * sizeof (*lh->file_names))); |
| 4147 | } |
| 4148 | |
| 4149 | fe = &lh->file_names[lh->num_file_names++]; |
| 4150 | fe->name = name; |
| 4151 | fe->dir_index = dir_index; |
| 4152 | fe->mod_time = mod_time; |
| 4153 | fe->length = length; |
| 4154 | } |
| 4155 | |
| 4156 | |
| 4157 | /* Read the statement program header starting at OFFSET in |
| 4158 | dwarf_line_buffer, according to the endianness of ABFD. Return a |
| 4159 | pointer to a struct line_header, allocated using xmalloc. |
| 4160 | |
| 4161 | NOTE: the strings in the include directory and file name tables of |
| 4162 | the returned object point into debug_line_buffer, and must not be |
| 4163 | freed. */ |
| 4164 | static struct line_header * |
| 4165 | dwarf_decode_line_header (unsigned int offset, bfd *abfd, |
| 4166 | const struct comp_unit_head *cu_header) |
| 4167 | { |
| 4168 | struct cleanup *back_to; |
| 4169 | struct line_header *lh; |
| 4170 | char *line_ptr; |
| 4171 | int bytes_read; |
| 4172 | int i; |
| 4173 | char *cur_dir, *cur_file; |
| 4174 | |
| 4175 | if (dwarf_line_buffer == NULL) |
| 4176 | { |
| 4177 | complain (&dwarf2_missing_line_number_section); |
| 4178 | return 0; |
| 4179 | } |
| 4180 | |
| 4181 | /* Make sure that at least there's room for the total_length field. That |
| 4182 | could be 12 bytes long, but we're just going to fudge that. */ |
| 4183 | if (offset + 4 >= dwarf_line_size) |
| 4184 | { |
| 4185 | complain (&dwarf2_statement_list_fits_in_line_number_section); |
| 4186 | return 0; |
| 4187 | } |
| 4188 | |
| 4189 | lh = xmalloc (sizeof (*lh)); |
| 4190 | memset (lh, 0, sizeof (*lh)); |
| 4191 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, |
| 4192 | (void *) lh); |
| 4193 | |
| 4194 | line_ptr = dwarf_line_buffer + offset; |
| 4195 | |
| 4196 | /* read in the header */ |
| 4197 | lh->total_length = read_initial_length (abfd, line_ptr, NULL, &bytes_read); |
| 4198 | line_ptr += bytes_read; |
| 4199 | if (line_ptr + lh->total_length > dwarf_line_buffer + dwarf_line_size) |
| 4200 | { |
| 4201 | complain (&dwarf2_statement_list_fits_in_line_number_section); |
| 4202 | return 0; |
| 4203 | } |
| 4204 | lh->statement_program_end = line_ptr + lh->total_length; |
| 4205 | lh->version = read_2_bytes (abfd, line_ptr); |
| 4206 | line_ptr += 2; |
| 4207 | lh->header_length = read_offset (abfd, line_ptr, cu_header, &bytes_read); |
| 4208 | line_ptr += bytes_read; |
| 4209 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
| 4210 | line_ptr += 1; |
| 4211 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
| 4212 | line_ptr += 1; |
| 4213 | lh->line_base = read_1_signed_byte (abfd, line_ptr); |
| 4214 | line_ptr += 1; |
| 4215 | lh->line_range = read_1_byte (abfd, line_ptr); |
| 4216 | line_ptr += 1; |
| 4217 | lh->opcode_base = read_1_byte (abfd, line_ptr); |
| 4218 | line_ptr += 1; |
| 4219 | lh->standard_opcode_lengths |
| 4220 | = (unsigned char *) xmalloc (lh->opcode_base * sizeof (unsigned char)); |
| 4221 | |
| 4222 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ |
| 4223 | for (i = 1; i < lh->opcode_base; ++i) |
| 4224 | { |
| 4225 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); |
| 4226 | line_ptr += 1; |
| 4227 | } |
| 4228 | |
| 4229 | /* Read directory table */ |
| 4230 | while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
| 4231 | { |
| 4232 | line_ptr += bytes_read; |
| 4233 | add_include_dir (lh, cur_dir); |
| 4234 | } |
| 4235 | line_ptr += bytes_read; |
| 4236 | |
| 4237 | /* Read file name table */ |
| 4238 | while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
| 4239 | { |
| 4240 | unsigned int dir_index, mod_time, length; |
| 4241 | |
| 4242 | line_ptr += bytes_read; |
| 4243 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4244 | line_ptr += bytes_read; |
| 4245 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4246 | line_ptr += bytes_read; |
| 4247 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4248 | line_ptr += bytes_read; |
| 4249 | |
| 4250 | add_file_name (lh, cur_file, dir_index, mod_time, length); |
| 4251 | } |
| 4252 | line_ptr += bytes_read; |
| 4253 | lh->statement_program_start = line_ptr; |
| 4254 | |
| 4255 | if (line_ptr > dwarf_line_buffer + dwarf_line_size) |
| 4256 | complain (&dwarf2_line_header_too_long); |
| 4257 | |
| 4258 | discard_cleanups (back_to); |
| 4259 | return lh; |
| 4260 | } |
| 4261 | |
| 4262 | /* This function exists to work around a bug in certain compilers |
| 4263 | (particularly GCC 2.95), in which the first line number marker of a |
| 4264 | function does not show up until after the prologue, right before |
| 4265 | the second line number marker. This function shifts ADDRESS down |
| 4266 | to the beginning of the function if necessary, and is called on |
| 4267 | addresses passed to record_line. */ |
| 4268 | |
| 4269 | static CORE_ADDR |
| 4270 | check_cu_functions (CORE_ADDR address) |
| 4271 | { |
| 4272 | struct function_range *fn; |
| 4273 | |
| 4274 | /* Find the function_range containing address. */ |
| 4275 | if (!cu_first_fn) |
| 4276 | return address; |
| 4277 | |
| 4278 | if (!cu_cached_fn) |
| 4279 | cu_cached_fn = cu_first_fn; |
| 4280 | |
| 4281 | fn = cu_cached_fn; |
| 4282 | while (fn) |
| 4283 | if (fn->lowpc <= address && fn->highpc > address) |
| 4284 | goto found; |
| 4285 | else |
| 4286 | fn = fn->next; |
| 4287 | |
| 4288 | fn = cu_first_fn; |
| 4289 | while (fn && fn != cu_cached_fn) |
| 4290 | if (fn->lowpc <= address && fn->highpc > address) |
| 4291 | goto found; |
| 4292 | else |
| 4293 | fn = fn->next; |
| 4294 | |
| 4295 | return address; |
| 4296 | |
| 4297 | found: |
| 4298 | if (fn->seen_line) |
| 4299 | return address; |
| 4300 | if (address != fn->lowpc) |
| 4301 | complain (&dwarf2_misplaced_line_number, |
| 4302 | (unsigned long) address, fn->name); |
| 4303 | fn->seen_line = 1; |
| 4304 | return fn->lowpc; |
| 4305 | } |
| 4306 | |
| 4307 | /* Decode the line number information for the compilation unit whose |
| 4308 | line number info is at OFFSET in the .debug_line section. |
| 4309 | The compilation directory of the file is passed in COMP_DIR. */ |
| 4310 | |
| 4311 | static void |
| 4312 | dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd, |
| 4313 | const struct comp_unit_head *cu_header) |
| 4314 | { |
| 4315 | char *line_ptr; |
| 4316 | char *line_end; |
| 4317 | unsigned int i, bytes_read; |
| 4318 | char *cur_dir; |
| 4319 | unsigned char op_code, extended_op, adj_opcode; |
| 4320 | |
| 4321 | line_ptr = lh->statement_program_start; |
| 4322 | line_end = lh->statement_program_end; |
| 4323 | |
| 4324 | /* Read the statement sequences until there's nothing left. */ |
| 4325 | while (line_ptr < line_end) |
| 4326 | { |
| 4327 | /* state machine registers */ |
| 4328 | CORE_ADDR address = 0; |
| 4329 | unsigned int file = 1; |
| 4330 | unsigned int line = 1; |
| 4331 | unsigned int column = 0; |
| 4332 | int is_stmt = lh->default_is_stmt; |
| 4333 | int basic_block = 0; |
| 4334 | int end_sequence = 0; |
| 4335 | |
| 4336 | /* Start a subfile for the current file of the state machine. */ |
| 4337 | if (lh->num_file_names >= file) |
| 4338 | { |
| 4339 | /* lh->include_dirs and lh->file_names are 0-based, but the |
| 4340 | directory and file name numbers in the statement program |
| 4341 | are 1-based. */ |
| 4342 | struct file_entry *fe = &lh->file_names[file - 1]; |
| 4343 | char *dir; |
| 4344 | if (fe->dir_index) |
| 4345 | dir = lh->include_dirs[fe->dir_index - 1]; |
| 4346 | else |
| 4347 | dir = comp_dir; |
| 4348 | dwarf2_start_subfile (fe->name, dir); |
| 4349 | } |
| 4350 | |
| 4351 | /* Decode the table. */ |
| 4352 | while (!end_sequence) |
| 4353 | { |
| 4354 | op_code = read_1_byte (abfd, line_ptr); |
| 4355 | line_ptr += 1; |
| 4356 | |
| 4357 | if (op_code >= lh->opcode_base) |
| 4358 | { /* Special operand. */ |
| 4359 | adj_opcode = op_code - lh->opcode_base; |
| 4360 | address += (adj_opcode / lh->line_range) |
| 4361 | * lh->minimum_instruction_length; |
| 4362 | line += lh->line_base + (adj_opcode % lh->line_range); |
| 4363 | /* append row to matrix using current values */ |
| 4364 | address = check_cu_functions (address); |
| 4365 | record_line (current_subfile, line, address); |
| 4366 | basic_block = 1; |
| 4367 | } |
| 4368 | else switch (op_code) |
| 4369 | { |
| 4370 | case DW_LNS_extended_op: |
| 4371 | line_ptr += 1; /* ignore length */ |
| 4372 | extended_op = read_1_byte (abfd, line_ptr); |
| 4373 | line_ptr += 1; |
| 4374 | switch (extended_op) |
| 4375 | { |
| 4376 | case DW_LNE_end_sequence: |
| 4377 | end_sequence = 1; |
| 4378 | record_line (current_subfile, 0, address); |
| 4379 | break; |
| 4380 | case DW_LNE_set_address: |
| 4381 | address = read_address (abfd, line_ptr, cu_header, &bytes_read); |
| 4382 | line_ptr += bytes_read; |
| 4383 | address += baseaddr; |
| 4384 | break; |
| 4385 | case DW_LNE_define_file: |
| 4386 | { |
| 4387 | char *cur_file; |
| 4388 | unsigned int dir_index, mod_time, length; |
| 4389 | |
| 4390 | cur_file = read_string (abfd, line_ptr, &bytes_read); |
| 4391 | line_ptr += bytes_read; |
| 4392 | dir_index = |
| 4393 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4394 | line_ptr += bytes_read; |
| 4395 | mod_time = |
| 4396 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4397 | line_ptr += bytes_read; |
| 4398 | length = |
| 4399 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4400 | line_ptr += bytes_read; |
| 4401 | add_file_name (lh, cur_file, dir_index, mod_time, length); |
| 4402 | } |
| 4403 | break; |
| 4404 | default: |
| 4405 | complain (&dwarf2_mangled_line_number_section); |
| 4406 | return; |
| 4407 | } |
| 4408 | break; |
| 4409 | case DW_LNS_copy: |
| 4410 | address = check_cu_functions (address); |
| 4411 | record_line (current_subfile, line, address); |
| 4412 | basic_block = 0; |
| 4413 | break; |
| 4414 | case DW_LNS_advance_pc: |
| 4415 | address += lh->minimum_instruction_length |
| 4416 | * read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4417 | line_ptr += bytes_read; |
| 4418 | break; |
| 4419 | case DW_LNS_advance_line: |
| 4420 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); |
| 4421 | line_ptr += bytes_read; |
| 4422 | break; |
| 4423 | case DW_LNS_set_file: |
| 4424 | { |
| 4425 | /* lh->include_dirs and lh->file_names are 0-based, |
| 4426 | but the directory and file name numbers in the |
| 4427 | statement program are 1-based. */ |
| 4428 | struct file_entry *fe; |
| 4429 | char *dir; |
| 4430 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4431 | line_ptr += bytes_read; |
| 4432 | fe = &lh->file_names[file - 1]; |
| 4433 | if (fe->dir_index) |
| 4434 | dir = lh->include_dirs[fe->dir_index - 1]; |
| 4435 | else |
| 4436 | dir = comp_dir; |
| 4437 | dwarf2_start_subfile (fe->name, dir); |
| 4438 | } |
| 4439 | break; |
| 4440 | case DW_LNS_set_column: |
| 4441 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4442 | line_ptr += bytes_read; |
| 4443 | break; |
| 4444 | case DW_LNS_negate_stmt: |
| 4445 | is_stmt = (!is_stmt); |
| 4446 | break; |
| 4447 | case DW_LNS_set_basic_block: |
| 4448 | basic_block = 1; |
| 4449 | break; |
| 4450 | /* Add to the address register of the state machine the |
| 4451 | address increment value corresponding to special opcode |
| 4452 | 255. Ie, this value is scaled by the minimum instruction |
| 4453 | length since special opcode 255 would have scaled the |
| 4454 | the increment. */ |
| 4455 | case DW_LNS_const_add_pc: |
| 4456 | address += (lh->minimum_instruction_length |
| 4457 | * ((255 - lh->opcode_base) / lh->line_range)); |
| 4458 | break; |
| 4459 | case DW_LNS_fixed_advance_pc: |
| 4460 | address += read_2_bytes (abfd, line_ptr); |
| 4461 | line_ptr += 2; |
| 4462 | break; |
| 4463 | default: |
| 4464 | { /* Unknown standard opcode, ignore it. */ |
| 4465 | int i; |
| 4466 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
| 4467 | { |
| 4468 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4469 | line_ptr += bytes_read; |
| 4470 | } |
| 4471 | } |
| 4472 | } |
| 4473 | } |
| 4474 | } |
| 4475 | } |
| 4476 | |
| 4477 | /* Start a subfile for DWARF. FILENAME is the name of the file and |
| 4478 | DIRNAME the name of the source directory which contains FILENAME |
| 4479 | or NULL if not known. |
| 4480 | This routine tries to keep line numbers from identical absolute and |
| 4481 | relative file names in a common subfile. |
| 4482 | |
| 4483 | Using the `list' example from the GDB testsuite, which resides in |
| 4484 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename |
| 4485 | of /srcdir/list0.c yields the following debugging information for list0.c: |
| 4486 | |
| 4487 | DW_AT_name: /srcdir/list0.c |
| 4488 | DW_AT_comp_dir: /compdir |
| 4489 | files.files[0].name: list0.h |
| 4490 | files.files[0].dir: /srcdir |
| 4491 | files.files[1].name: list0.c |
| 4492 | files.files[1].dir: /srcdir |
| 4493 | |
| 4494 | The line number information for list0.c has to end up in a single |
| 4495 | subfile, so that `break /srcdir/list0.c:1' works as expected. */ |
| 4496 | |
| 4497 | static void |
| 4498 | dwarf2_start_subfile (char *filename, char *dirname) |
| 4499 | { |
| 4500 | /* If the filename isn't absolute, try to match an existing subfile |
| 4501 | with the full pathname. */ |
| 4502 | |
| 4503 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
| 4504 | { |
| 4505 | struct subfile *subfile; |
| 4506 | char *fullname = concat (dirname, "/", filename, NULL); |
| 4507 | |
| 4508 | for (subfile = subfiles; subfile; subfile = subfile->next) |
| 4509 | { |
| 4510 | if (FILENAME_CMP (subfile->name, fullname) == 0) |
| 4511 | { |
| 4512 | current_subfile = subfile; |
| 4513 | xfree (fullname); |
| 4514 | return; |
| 4515 | } |
| 4516 | } |
| 4517 | xfree (fullname); |
| 4518 | } |
| 4519 | start_subfile (filename, dirname); |
| 4520 | } |
| 4521 | |
| 4522 | /* Given a pointer to a DWARF information entry, figure out if we need |
| 4523 | to make a symbol table entry for it, and if so, create a new entry |
| 4524 | and return a pointer to it. |
| 4525 | If TYPE is NULL, determine symbol type from the die, otherwise |
| 4526 | used the passed type. */ |
| 4527 | |
| 4528 | static struct symbol * |
| 4529 | new_symbol (struct die_info *die, struct type *type, struct objfile *objfile, |
| 4530 | const struct comp_unit_head *cu_header) |
| 4531 | { |
| 4532 | struct symbol *sym = NULL; |
| 4533 | char *name; |
| 4534 | struct attribute *attr = NULL; |
| 4535 | struct attribute *attr2 = NULL; |
| 4536 | CORE_ADDR addr; |
| 4537 | |
| 4538 | name = dwarf2_linkage_name (die); |
| 4539 | if (name) |
| 4540 | { |
| 4541 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
| 4542 | sizeof (struct symbol)); |
| 4543 | OBJSTAT (objfile, n_syms++); |
| 4544 | memset (sym, 0, sizeof (struct symbol)); |
| 4545 | SYMBOL_NAME (sym) = obsavestring (name, strlen (name), |
| 4546 | &objfile->symbol_obstack); |
| 4547 | |
| 4548 | /* Default assumptions. |
| 4549 | Use the passed type or decode it from the die. */ |
| 4550 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
| 4551 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 4552 | if (type != NULL) |
| 4553 | SYMBOL_TYPE (sym) = type; |
| 4554 | else |
| 4555 | SYMBOL_TYPE (sym) = die_type (die, objfile, cu_header); |
| 4556 | attr = dwarf_attr (die, DW_AT_decl_line); |
| 4557 | if (attr) |
| 4558 | { |
| 4559 | SYMBOL_LINE (sym) = DW_UNSND (attr); |
| 4560 | } |
| 4561 | |
| 4562 | /* If this symbol is from a C++ compilation, then attempt to |
| 4563 | cache the demangled form for future reference. This is a |
| 4564 | typical time versus space tradeoff, that was decided in favor |
| 4565 | of time because it sped up C++ symbol lookups by a factor of |
| 4566 | about 20. */ |
| 4567 | |
| 4568 | SYMBOL_LANGUAGE (sym) = cu_language; |
| 4569 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); |
| 4570 | switch (die->tag) |
| 4571 | { |
| 4572 | case DW_TAG_label: |
| 4573 | attr = dwarf_attr (die, DW_AT_low_pc); |
| 4574 | if (attr) |
| 4575 | { |
| 4576 | SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr; |
| 4577 | } |
| 4578 | SYMBOL_CLASS (sym) = LOC_LABEL; |
| 4579 | break; |
| 4580 | case DW_TAG_subprogram: |
| 4581 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by |
| 4582 | finish_block. */ |
| 4583 | SYMBOL_CLASS (sym) = LOC_BLOCK; |
| 4584 | attr2 = dwarf_attr (die, DW_AT_external); |
| 4585 | if (attr2 && (DW_UNSND (attr2) != 0)) |
| 4586 | { |
| 4587 | add_symbol_to_list (sym, &global_symbols); |
| 4588 | } |
| 4589 | else |
| 4590 | { |
| 4591 | add_symbol_to_list (sym, list_in_scope); |
| 4592 | } |
| 4593 | break; |
| 4594 | case DW_TAG_variable: |
| 4595 | /* Compilation with minimal debug info may result in variables |
| 4596 | with missing type entries. Change the misleading `void' type |
| 4597 | to something sensible. */ |
| 4598 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
| 4599 | SYMBOL_TYPE (sym) = init_type (TYPE_CODE_INT, |
| 4600 | TARGET_INT_BIT / HOST_CHAR_BIT, 0, |
| 4601 | "<variable, no debug info>", |
| 4602 | objfile); |
| 4603 | attr = dwarf_attr (die, DW_AT_const_value); |
| 4604 | if (attr) |
| 4605 | { |
| 4606 | dwarf2_const_value (attr, sym, objfile, cu_header); |
| 4607 | attr2 = dwarf_attr (die, DW_AT_external); |
| 4608 | if (attr2 && (DW_UNSND (attr2) != 0)) |
| 4609 | add_symbol_to_list (sym, &global_symbols); |
| 4610 | else |
| 4611 | add_symbol_to_list (sym, list_in_scope); |
| 4612 | break; |
| 4613 | } |
| 4614 | attr = dwarf_attr (die, DW_AT_location); |
| 4615 | if (attr) |
| 4616 | { |
| 4617 | attr2 = dwarf_attr (die, DW_AT_external); |
| 4618 | if (attr2 && (DW_UNSND (attr2) != 0)) |
| 4619 | { |
| 4620 | SYMBOL_VALUE_ADDRESS (sym) = |
| 4621 | decode_locdesc (DW_BLOCK (attr), objfile, cu_header); |
| 4622 | add_symbol_to_list (sym, &global_symbols); |
| 4623 | |
| 4624 | /* In shared libraries the address of the variable |
| 4625 | in the location descriptor might still be relocatable, |
| 4626 | so its value could be zero. |
| 4627 | Enter the symbol as a LOC_UNRESOLVED symbol, if its |
| 4628 | value is zero, the address of the variable will then |
| 4629 | be determined from the minimal symbol table whenever |
| 4630 | the variable is referenced. */ |
| 4631 | if (SYMBOL_VALUE_ADDRESS (sym)) |
| 4632 | { |
| 4633 | fixup_symbol_section (sym, objfile); |
| 4634 | SYMBOL_VALUE_ADDRESS (sym) += |
| 4635 | ANOFFSET (objfile->section_offsets, |
| 4636 | SYMBOL_SECTION (sym)); |
| 4637 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 4638 | } |
| 4639 | else |
| 4640 | SYMBOL_CLASS (sym) = LOC_UNRESOLVED; |
| 4641 | } |
| 4642 | else |
| 4643 | { |
| 4644 | SYMBOL_VALUE (sym) = addr = |
| 4645 | decode_locdesc (DW_BLOCK (attr), objfile, cu_header); |
| 4646 | add_symbol_to_list (sym, list_in_scope); |
| 4647 | if (optimized_out) |
| 4648 | { |
| 4649 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; |
| 4650 | } |
| 4651 | else if (isreg) |
| 4652 | { |
| 4653 | SYMBOL_CLASS (sym) = LOC_REGISTER; |
| 4654 | SYMBOL_VALUE (sym) = |
| 4655 | DWARF2_REG_TO_REGNUM (SYMBOL_VALUE (sym)); |
| 4656 | } |
| 4657 | else if (offreg) |
| 4658 | { |
| 4659 | SYMBOL_CLASS (sym) = LOC_BASEREG; |
| 4660 | SYMBOL_BASEREG (sym) = DWARF2_REG_TO_REGNUM (basereg); |
| 4661 | } |
| 4662 | else if (islocal) |
| 4663 | { |
| 4664 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
| 4665 | } |
| 4666 | else |
| 4667 | { |
| 4668 | fixup_symbol_section (sym, objfile); |
| 4669 | SYMBOL_VALUE_ADDRESS (sym) = |
| 4670 | addr + ANOFFSET (objfile->section_offsets, |
| 4671 | SYMBOL_SECTION (sym)); |
| 4672 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 4673 | } |
| 4674 | } |
| 4675 | } |
| 4676 | else |
| 4677 | { |
| 4678 | /* We do not know the address of this symbol. |
| 4679 | If it is an external symbol and we have type information |
| 4680 | for it, enter the symbol as a LOC_UNRESOLVED symbol. |
| 4681 | The address of the variable will then be determined from |
| 4682 | the minimal symbol table whenever the variable is |
| 4683 | referenced. */ |
| 4684 | attr2 = dwarf_attr (die, DW_AT_external); |
| 4685 | if (attr2 && (DW_UNSND (attr2) != 0) |
| 4686 | && dwarf_attr (die, DW_AT_type) != NULL) |
| 4687 | { |
| 4688 | SYMBOL_CLASS (sym) = LOC_UNRESOLVED; |
| 4689 | add_symbol_to_list (sym, &global_symbols); |
| 4690 | } |
| 4691 | } |
| 4692 | break; |
| 4693 | case DW_TAG_formal_parameter: |
| 4694 | attr = dwarf_attr (die, DW_AT_location); |
| 4695 | if (attr) |
| 4696 | { |
| 4697 | SYMBOL_VALUE (sym) = |
| 4698 | decode_locdesc (DW_BLOCK (attr), objfile, cu_header); |
| 4699 | if (isreg) |
| 4700 | { |
| 4701 | SYMBOL_CLASS (sym) = LOC_REGPARM; |
| 4702 | SYMBOL_VALUE (sym) = |
| 4703 | DWARF2_REG_TO_REGNUM (SYMBOL_VALUE (sym)); |
| 4704 | } |
| 4705 | else if (offreg) |
| 4706 | { |
| 4707 | if (isderef) |
| 4708 | { |
| 4709 | if (basereg != frame_base_reg) |
| 4710 | complain (&dwarf2_complex_location_expr); |
| 4711 | SYMBOL_CLASS (sym) = LOC_REF_ARG; |
| 4712 | } |
| 4713 | else |
| 4714 | { |
| 4715 | SYMBOL_CLASS (sym) = LOC_BASEREG_ARG; |
| 4716 | SYMBOL_BASEREG (sym) = DWARF2_REG_TO_REGNUM (basereg); |
| 4717 | } |
| 4718 | } |
| 4719 | else |
| 4720 | { |
| 4721 | SYMBOL_CLASS (sym) = LOC_ARG; |
| 4722 | } |
| 4723 | } |
| 4724 | attr = dwarf_attr (die, DW_AT_const_value); |
| 4725 | if (attr) |
| 4726 | { |
| 4727 | dwarf2_const_value (attr, sym, objfile, cu_header); |
| 4728 | } |
| 4729 | add_symbol_to_list (sym, list_in_scope); |
| 4730 | break; |
| 4731 | case DW_TAG_unspecified_parameters: |
| 4732 | /* From varargs functions; gdb doesn't seem to have any |
| 4733 | interest in this information, so just ignore it for now. |
| 4734 | (FIXME?) */ |
| 4735 | break; |
| 4736 | case DW_TAG_class_type: |
| 4737 | case DW_TAG_structure_type: |
| 4738 | case DW_TAG_union_type: |
| 4739 | case DW_TAG_enumeration_type: |
| 4740 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
| 4741 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; |
| 4742 | add_symbol_to_list (sym, list_in_scope); |
| 4743 | |
| 4744 | /* The semantics of C++ state that "struct foo { ... }" also |
| 4745 | defines a typedef for "foo". Synthesize a typedef symbol so |
| 4746 | that "ptype foo" works as expected. */ |
| 4747 | if (cu_language == language_cplus) |
| 4748 | { |
| 4749 | struct symbol *typedef_sym = (struct symbol *) |
| 4750 | obstack_alloc (&objfile->symbol_obstack, |
| 4751 | sizeof (struct symbol)); |
| 4752 | *typedef_sym = *sym; |
| 4753 | SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE; |
| 4754 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) |
| 4755 | TYPE_NAME (SYMBOL_TYPE (sym)) = |
| 4756 | obsavestring (SYMBOL_NAME (sym), |
| 4757 | strlen (SYMBOL_NAME (sym)), |
| 4758 | &objfile->type_obstack); |
| 4759 | add_symbol_to_list (typedef_sym, list_in_scope); |
| 4760 | } |
| 4761 | break; |
| 4762 | case DW_TAG_typedef: |
| 4763 | case DW_TAG_base_type: |
| 4764 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
| 4765 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
| 4766 | add_symbol_to_list (sym, list_in_scope); |
| 4767 | break; |
| 4768 | case DW_TAG_enumerator: |
| 4769 | attr = dwarf_attr (die, DW_AT_const_value); |
| 4770 | if (attr) |
| 4771 | { |
| 4772 | dwarf2_const_value (attr, sym, objfile, cu_header); |
| 4773 | } |
| 4774 | add_symbol_to_list (sym, list_in_scope); |
| 4775 | break; |
| 4776 | default: |
| 4777 | /* Not a tag we recognize. Hopefully we aren't processing |
| 4778 | trash data, but since we must specifically ignore things |
| 4779 | we don't recognize, there is nothing else we should do at |
| 4780 | this point. */ |
| 4781 | complain (&dwarf2_unsupported_tag, dwarf_tag_name (die->tag)); |
| 4782 | break; |
| 4783 | } |
| 4784 | } |
| 4785 | return (sym); |
| 4786 | } |
| 4787 | |
| 4788 | /* Copy constant value from an attribute to a symbol. */ |
| 4789 | |
| 4790 | static void |
| 4791 | dwarf2_const_value (struct attribute *attr, struct symbol *sym, |
| 4792 | struct objfile *objfile, |
| 4793 | const struct comp_unit_head *cu_header) |
| 4794 | { |
| 4795 | struct dwarf_block *blk; |
| 4796 | |
| 4797 | switch (attr->form) |
| 4798 | { |
| 4799 | case DW_FORM_addr: |
| 4800 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size) |
| 4801 | complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym), |
| 4802 | cu_header->addr_size, TYPE_LENGTH (SYMBOL_TYPE (sym))); |
| 4803 | SYMBOL_VALUE_BYTES (sym) = (char *) |
| 4804 | obstack_alloc (&objfile->symbol_obstack, cu_header->addr_size); |
| 4805 | store_address (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size, |
| 4806 | DW_ADDR (attr)); |
| 4807 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; |
| 4808 | break; |
| 4809 | case DW_FORM_block1: |
| 4810 | case DW_FORM_block2: |
| 4811 | case DW_FORM_block4: |
| 4812 | case DW_FORM_block: |
| 4813 | blk = DW_BLOCK (attr); |
| 4814 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size) |
| 4815 | complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym), |
| 4816 | blk->size, TYPE_LENGTH (SYMBOL_TYPE (sym))); |
| 4817 | SYMBOL_VALUE_BYTES (sym) = (char *) |
| 4818 | obstack_alloc (&objfile->symbol_obstack, blk->size); |
| 4819 | memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size); |
| 4820 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; |
| 4821 | break; |
| 4822 | |
| 4823 | /* The DW_AT_const_value attributes are supposed to carry the |
| 4824 | symbol's value "represented as it would be on the target |
| 4825 | architecture." By the time we get here, it's already been |
| 4826 | converted to host endianness, so we just need to sign- or |
| 4827 | zero-extend it as appropriate. */ |
| 4828 | case DW_FORM_data1: |
| 4829 | dwarf2_const_value_data (attr, sym, 8); |
| 4830 | break; |
| 4831 | case DW_FORM_data2: |
| 4832 | dwarf2_const_value_data (attr, sym, 16); |
| 4833 | break; |
| 4834 | case DW_FORM_data4: |
| 4835 | dwarf2_const_value_data (attr, sym, 32); |
| 4836 | break; |
| 4837 | case DW_FORM_data8: |
| 4838 | dwarf2_const_value_data (attr, sym, 64); |
| 4839 | break; |
| 4840 | |
| 4841 | case DW_FORM_sdata: |
| 4842 | SYMBOL_VALUE (sym) = DW_SND (attr); |
| 4843 | SYMBOL_CLASS (sym) = LOC_CONST; |
| 4844 | break; |
| 4845 | |
| 4846 | case DW_FORM_udata: |
| 4847 | SYMBOL_VALUE (sym) = DW_UNSND (attr); |
| 4848 | SYMBOL_CLASS (sym) = LOC_CONST; |
| 4849 | break; |
| 4850 | |
| 4851 | default: |
| 4852 | complain (&dwarf2_unsupported_const_value_attr, |
| 4853 | dwarf_form_name (attr->form)); |
| 4854 | SYMBOL_VALUE (sym) = 0; |
| 4855 | SYMBOL_CLASS (sym) = LOC_CONST; |
| 4856 | break; |
| 4857 | } |
| 4858 | } |
| 4859 | |
| 4860 | |
| 4861 | /* Given an attr with a DW_FORM_dataN value in host byte order, sign- |
| 4862 | or zero-extend it as appropriate for the symbol's type. */ |
| 4863 | static void |
| 4864 | dwarf2_const_value_data (struct attribute *attr, |
| 4865 | struct symbol *sym, |
| 4866 | int bits) |
| 4867 | { |
| 4868 | LONGEST l = DW_UNSND (attr); |
| 4869 | |
| 4870 | if (bits < sizeof (l) * 8) |
| 4871 | { |
| 4872 | if (TYPE_UNSIGNED (SYMBOL_TYPE (sym))) |
| 4873 | l &= ((LONGEST) 1 << bits) - 1; |
| 4874 | else |
| 4875 | l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits); |
| 4876 | } |
| 4877 | |
| 4878 | SYMBOL_VALUE (sym) = l; |
| 4879 | SYMBOL_CLASS (sym) = LOC_CONST; |
| 4880 | } |
| 4881 | |
| 4882 | |
| 4883 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
| 4884 | |
| 4885 | static struct type * |
| 4886 | die_type (struct die_info *die, struct objfile *objfile, |
| 4887 | const struct comp_unit_head *cu_header) |
| 4888 | { |
| 4889 | struct type *type; |
| 4890 | struct attribute *type_attr; |
| 4891 | struct die_info *type_die; |
| 4892 | unsigned int ref; |
| 4893 | |
| 4894 | type_attr = dwarf_attr (die, DW_AT_type); |
| 4895 | if (!type_attr) |
| 4896 | { |
| 4897 | /* A missing DW_AT_type represents a void type. */ |
| 4898 | return dwarf2_fundamental_type (objfile, FT_VOID); |
| 4899 | } |
| 4900 | else |
| 4901 | { |
| 4902 | ref = dwarf2_get_ref_die_offset (type_attr); |
| 4903 | type_die = follow_die_ref (ref); |
| 4904 | if (!type_die) |
| 4905 | { |
| 4906 | error ("Dwarf Error: Cannot find referent at offset %d.", ref); |
| 4907 | return NULL; |
| 4908 | } |
| 4909 | } |
| 4910 | type = tag_type_to_type (type_die, objfile, cu_header); |
| 4911 | if (!type) |
| 4912 | { |
| 4913 | dump_die (type_die); |
| 4914 | error ("Dwarf Error: Problem turning type die at offset into gdb type."); |
| 4915 | } |
| 4916 | return type; |
| 4917 | } |
| 4918 | |
| 4919 | /* Return the containing type of the die in question using its |
| 4920 | DW_AT_containing_type attribute. */ |
| 4921 | |
| 4922 | static struct type * |
| 4923 | die_containing_type (struct die_info *die, struct objfile *objfile, |
| 4924 | const struct comp_unit_head *cu_header) |
| 4925 | { |
| 4926 | struct type *type = NULL; |
| 4927 | struct attribute *type_attr; |
| 4928 | struct die_info *type_die = NULL; |
| 4929 | unsigned int ref; |
| 4930 | |
| 4931 | type_attr = dwarf_attr (die, DW_AT_containing_type); |
| 4932 | if (type_attr) |
| 4933 | { |
| 4934 | ref = dwarf2_get_ref_die_offset (type_attr); |
| 4935 | type_die = follow_die_ref (ref); |
| 4936 | if (!type_die) |
| 4937 | { |
| 4938 | error ("Dwarf Error: Cannot find referent at offset %d.", ref); |
| 4939 | return NULL; |
| 4940 | } |
| 4941 | type = tag_type_to_type (type_die, objfile, cu_header); |
| 4942 | } |
| 4943 | if (!type) |
| 4944 | { |
| 4945 | if (type_die) |
| 4946 | dump_die (type_die); |
| 4947 | error ("Dwarf Error: Problem turning containing type into gdb type."); |
| 4948 | } |
| 4949 | return type; |
| 4950 | } |
| 4951 | |
| 4952 | #if 0 |
| 4953 | static struct type * |
| 4954 | type_at_offset (unsigned int offset, struct objfile *objfile) |
| 4955 | { |
| 4956 | struct die_info *die; |
| 4957 | struct type *type; |
| 4958 | |
| 4959 | die = follow_die_ref (offset); |
| 4960 | if (!die) |
| 4961 | { |
| 4962 | error ("Dwarf Error: Cannot find type referent at offset %d.", offset); |
| 4963 | return NULL; |
| 4964 | } |
| 4965 | type = tag_type_to_type (die, objfile); |
| 4966 | return type; |
| 4967 | } |
| 4968 | #endif |
| 4969 | |
| 4970 | static struct type * |
| 4971 | tag_type_to_type (struct die_info *die, struct objfile *objfile, |
| 4972 | const struct comp_unit_head *cu_header) |
| 4973 | { |
| 4974 | if (die->type) |
| 4975 | { |
| 4976 | return die->type; |
| 4977 | } |
| 4978 | else |
| 4979 | { |
| 4980 | read_type_die (die, objfile, cu_header); |
| 4981 | if (!die->type) |
| 4982 | { |
| 4983 | dump_die (die); |
| 4984 | error ("Dwarf Error: Cannot find type of die."); |
| 4985 | } |
| 4986 | return die->type; |
| 4987 | } |
| 4988 | } |
| 4989 | |
| 4990 | static void |
| 4991 | read_type_die (struct die_info *die, struct objfile *objfile, |
| 4992 | const struct comp_unit_head *cu_header) |
| 4993 | { |
| 4994 | switch (die->tag) |
| 4995 | { |
| 4996 | case DW_TAG_class_type: |
| 4997 | case DW_TAG_structure_type: |
| 4998 | case DW_TAG_union_type: |
| 4999 | read_structure_scope (die, objfile, cu_header); |
| 5000 | break; |
| 5001 | case DW_TAG_enumeration_type: |
| 5002 | read_enumeration (die, objfile, cu_header); |
| 5003 | break; |
| 5004 | case DW_TAG_subprogram: |
| 5005 | case DW_TAG_subroutine_type: |
| 5006 | read_subroutine_type (die, objfile, cu_header); |
| 5007 | break; |
| 5008 | case DW_TAG_array_type: |
| 5009 | read_array_type (die, objfile, cu_header); |
| 5010 | break; |
| 5011 | case DW_TAG_pointer_type: |
| 5012 | read_tag_pointer_type (die, objfile, cu_header); |
| 5013 | break; |
| 5014 | case DW_TAG_ptr_to_member_type: |
| 5015 | read_tag_ptr_to_member_type (die, objfile, cu_header); |
| 5016 | break; |
| 5017 | case DW_TAG_reference_type: |
| 5018 | read_tag_reference_type (die, objfile, cu_header); |
| 5019 | break; |
| 5020 | case DW_TAG_const_type: |
| 5021 | read_tag_const_type (die, objfile, cu_header); |
| 5022 | break; |
| 5023 | case DW_TAG_volatile_type: |
| 5024 | read_tag_volatile_type (die, objfile, cu_header); |
| 5025 | break; |
| 5026 | case DW_TAG_string_type: |
| 5027 | read_tag_string_type (die, objfile); |
| 5028 | break; |
| 5029 | case DW_TAG_typedef: |
| 5030 | read_typedef (die, objfile, cu_header); |
| 5031 | break; |
| 5032 | case DW_TAG_base_type: |
| 5033 | read_base_type (die, objfile); |
| 5034 | break; |
| 5035 | default: |
| 5036 | complain (&dwarf2_unexpected_tag, dwarf_tag_name (die->tag)); |
| 5037 | break; |
| 5038 | } |
| 5039 | } |
| 5040 | |
| 5041 | static struct type * |
| 5042 | dwarf_base_type (int encoding, int size, struct objfile *objfile) |
| 5043 | { |
| 5044 | /* FIXME - this should not produce a new (struct type *) |
| 5045 | every time. It should cache base types. */ |
| 5046 | struct type *type; |
| 5047 | switch (encoding) |
| 5048 | { |
| 5049 | case DW_ATE_address: |
| 5050 | type = dwarf2_fundamental_type (objfile, FT_VOID); |
| 5051 | return type; |
| 5052 | case DW_ATE_boolean: |
| 5053 | type = dwarf2_fundamental_type (objfile, FT_BOOLEAN); |
| 5054 | return type; |
| 5055 | case DW_ATE_complex_float: |
| 5056 | if (size == 16) |
| 5057 | { |
| 5058 | type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX); |
| 5059 | } |
| 5060 | else |
| 5061 | { |
| 5062 | type = dwarf2_fundamental_type (objfile, FT_COMPLEX); |
| 5063 | } |
| 5064 | return type; |
| 5065 | case DW_ATE_float: |
| 5066 | if (size == 8) |
| 5067 | { |
| 5068 | type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT); |
| 5069 | } |
| 5070 | else |
| 5071 | { |
| 5072 | type = dwarf2_fundamental_type (objfile, FT_FLOAT); |
| 5073 | } |
| 5074 | return type; |
| 5075 | case DW_ATE_signed: |
| 5076 | switch (size) |
| 5077 | { |
| 5078 | case 1: |
| 5079 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR); |
| 5080 | break; |
| 5081 | case 2: |
| 5082 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT); |
| 5083 | break; |
| 5084 | default: |
| 5085 | case 4: |
| 5086 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER); |
| 5087 | break; |
| 5088 | } |
| 5089 | return type; |
| 5090 | case DW_ATE_signed_char: |
| 5091 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR); |
| 5092 | return type; |
| 5093 | case DW_ATE_unsigned: |
| 5094 | switch (size) |
| 5095 | { |
| 5096 | case 1: |
| 5097 | type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR); |
| 5098 | break; |
| 5099 | case 2: |
| 5100 | type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT); |
| 5101 | break; |
| 5102 | default: |
| 5103 | case 4: |
| 5104 | type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER); |
| 5105 | break; |
| 5106 | } |
| 5107 | return type; |
| 5108 | case DW_ATE_unsigned_char: |
| 5109 | type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR); |
| 5110 | return type; |
| 5111 | default: |
| 5112 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER); |
| 5113 | return type; |
| 5114 | } |
| 5115 | } |
| 5116 | |
| 5117 | #if 0 |
| 5118 | struct die_info * |
| 5119 | copy_die (struct die_info *old_die) |
| 5120 | { |
| 5121 | struct die_info *new_die; |
| 5122 | int i, num_attrs; |
| 5123 | |
| 5124 | new_die = (struct die_info *) xmalloc (sizeof (struct die_info)); |
| 5125 | memset (new_die, 0, sizeof (struct die_info)); |
| 5126 | |
| 5127 | new_die->tag = old_die->tag; |
| 5128 | new_die->has_children = old_die->has_children; |
| 5129 | new_die->abbrev = old_die->abbrev; |
| 5130 | new_die->offset = old_die->offset; |
| 5131 | new_die->type = NULL; |
| 5132 | |
| 5133 | num_attrs = old_die->num_attrs; |
| 5134 | new_die->num_attrs = num_attrs; |
| 5135 | new_die->attrs = (struct attribute *) |
| 5136 | xmalloc (num_attrs * sizeof (struct attribute)); |
| 5137 | |
| 5138 | for (i = 0; i < old_die->num_attrs; ++i) |
| 5139 | { |
| 5140 | new_die->attrs[i].name = old_die->attrs[i].name; |
| 5141 | new_die->attrs[i].form = old_die->attrs[i].form; |
| 5142 | new_die->attrs[i].u.addr = old_die->attrs[i].u.addr; |
| 5143 | } |
| 5144 | |
| 5145 | new_die->next = NULL; |
| 5146 | return new_die; |
| 5147 | } |
| 5148 | #endif |
| 5149 | |
| 5150 | /* Return sibling of die, NULL if no sibling. */ |
| 5151 | |
| 5152 | static struct die_info * |
| 5153 | sibling_die (struct die_info *die) |
| 5154 | { |
| 5155 | int nesting_level = 0; |
| 5156 | |
| 5157 | if (!die->has_children) |
| 5158 | { |
| 5159 | if (die->next && (die->next->tag == 0)) |
| 5160 | { |
| 5161 | return NULL; |
| 5162 | } |
| 5163 | else |
| 5164 | { |
| 5165 | return die->next; |
| 5166 | } |
| 5167 | } |
| 5168 | else |
| 5169 | { |
| 5170 | do |
| 5171 | { |
| 5172 | if (die->has_children) |
| 5173 | { |
| 5174 | nesting_level++; |
| 5175 | } |
| 5176 | if (die->tag == 0) |
| 5177 | { |
| 5178 | nesting_level--; |
| 5179 | } |
| 5180 | die = die->next; |
| 5181 | } |
| 5182 | while (nesting_level); |
| 5183 | if (die && (die->tag == 0)) |
| 5184 | { |
| 5185 | return NULL; |
| 5186 | } |
| 5187 | else |
| 5188 | { |
| 5189 | return die; |
| 5190 | } |
| 5191 | } |
| 5192 | } |
| 5193 | |
| 5194 | /* Get linkage name of a die, return NULL if not found. */ |
| 5195 | |
| 5196 | static char * |
| 5197 | dwarf2_linkage_name (struct die_info *die) |
| 5198 | { |
| 5199 | struct attribute *attr; |
| 5200 | |
| 5201 | attr = dwarf_attr (die, DW_AT_MIPS_linkage_name); |
| 5202 | if (attr && DW_STRING (attr)) |
| 5203 | return DW_STRING (attr); |
| 5204 | attr = dwarf_attr (die, DW_AT_name); |
| 5205 | if (attr && DW_STRING (attr)) |
| 5206 | return DW_STRING (attr); |
| 5207 | return NULL; |
| 5208 | } |
| 5209 | |
| 5210 | /* Convert a DIE tag into its string name. */ |
| 5211 | |
| 5212 | static char * |
| 5213 | dwarf_tag_name (register unsigned tag) |
| 5214 | { |
| 5215 | switch (tag) |
| 5216 | { |
| 5217 | case DW_TAG_padding: |
| 5218 | return "DW_TAG_padding"; |
| 5219 | case DW_TAG_array_type: |
| 5220 | return "DW_TAG_array_type"; |
| 5221 | case DW_TAG_class_type: |
| 5222 | return "DW_TAG_class_type"; |
| 5223 | case DW_TAG_entry_point: |
| 5224 | return "DW_TAG_entry_point"; |
| 5225 | case DW_TAG_enumeration_type: |
| 5226 | return "DW_TAG_enumeration_type"; |
| 5227 | case DW_TAG_formal_parameter: |
| 5228 | return "DW_TAG_formal_parameter"; |
| 5229 | case DW_TAG_imported_declaration: |
| 5230 | return "DW_TAG_imported_declaration"; |
| 5231 | case DW_TAG_label: |
| 5232 | return "DW_TAG_label"; |
| 5233 | case DW_TAG_lexical_block: |
| 5234 | return "DW_TAG_lexical_block"; |
| 5235 | case DW_TAG_member: |
| 5236 | return "DW_TAG_member"; |
| 5237 | case DW_TAG_pointer_type: |
| 5238 | return "DW_TAG_pointer_type"; |
| 5239 | case DW_TAG_reference_type: |
| 5240 | return "DW_TAG_reference_type"; |
| 5241 | case DW_TAG_compile_unit: |
| 5242 | return "DW_TAG_compile_unit"; |
| 5243 | case DW_TAG_string_type: |
| 5244 | return "DW_TAG_string_type"; |
| 5245 | case DW_TAG_structure_type: |
| 5246 | return "DW_TAG_structure_type"; |
| 5247 | case DW_TAG_subroutine_type: |
| 5248 | return "DW_TAG_subroutine_type"; |
| 5249 | case DW_TAG_typedef: |
| 5250 | return "DW_TAG_typedef"; |
| 5251 | case DW_TAG_union_type: |
| 5252 | return "DW_TAG_union_type"; |
| 5253 | case DW_TAG_unspecified_parameters: |
| 5254 | return "DW_TAG_unspecified_parameters"; |
| 5255 | case DW_TAG_variant: |
| 5256 | return "DW_TAG_variant"; |
| 5257 | case DW_TAG_common_block: |
| 5258 | return "DW_TAG_common_block"; |
| 5259 | case DW_TAG_common_inclusion: |
| 5260 | return "DW_TAG_common_inclusion"; |
| 5261 | case DW_TAG_inheritance: |
| 5262 | return "DW_TAG_inheritance"; |
| 5263 | case DW_TAG_inlined_subroutine: |
| 5264 | return "DW_TAG_inlined_subroutine"; |
| 5265 | case DW_TAG_module: |
| 5266 | return "DW_TAG_module"; |
| 5267 | case DW_TAG_ptr_to_member_type: |
| 5268 | return "DW_TAG_ptr_to_member_type"; |
| 5269 | case DW_TAG_set_type: |
| 5270 | return "DW_TAG_set_type"; |
| 5271 | case DW_TAG_subrange_type: |
| 5272 | return "DW_TAG_subrange_type"; |
| 5273 | case DW_TAG_with_stmt: |
| 5274 | return "DW_TAG_with_stmt"; |
| 5275 | case DW_TAG_access_declaration: |
| 5276 | return "DW_TAG_access_declaration"; |
| 5277 | case DW_TAG_base_type: |
| 5278 | return "DW_TAG_base_type"; |
| 5279 | case DW_TAG_catch_block: |
| 5280 | return "DW_TAG_catch_block"; |
| 5281 | case DW_TAG_const_type: |
| 5282 | return "DW_TAG_const_type"; |
| 5283 | case DW_TAG_constant: |
| 5284 | return "DW_TAG_constant"; |
| 5285 | case DW_TAG_enumerator: |
| 5286 | return "DW_TAG_enumerator"; |
| 5287 | case DW_TAG_file_type: |
| 5288 | return "DW_TAG_file_type"; |
| 5289 | case DW_TAG_friend: |
| 5290 | return "DW_TAG_friend"; |
| 5291 | case DW_TAG_namelist: |
| 5292 | return "DW_TAG_namelist"; |
| 5293 | case DW_TAG_namelist_item: |
| 5294 | return "DW_TAG_namelist_item"; |
| 5295 | case DW_TAG_packed_type: |
| 5296 | return "DW_TAG_packed_type"; |
| 5297 | case DW_TAG_subprogram: |
| 5298 | return "DW_TAG_subprogram"; |
| 5299 | case DW_TAG_template_type_param: |
| 5300 | return "DW_TAG_template_type_param"; |
| 5301 | case DW_TAG_template_value_param: |
| 5302 | return "DW_TAG_template_value_param"; |
| 5303 | case DW_TAG_thrown_type: |
| 5304 | return "DW_TAG_thrown_type"; |
| 5305 | case DW_TAG_try_block: |
| 5306 | return "DW_TAG_try_block"; |
| 5307 | case DW_TAG_variant_part: |
| 5308 | return "DW_TAG_variant_part"; |
| 5309 | case DW_TAG_variable: |
| 5310 | return "DW_TAG_variable"; |
| 5311 | case DW_TAG_volatile_type: |
| 5312 | return "DW_TAG_volatile_type"; |
| 5313 | case DW_TAG_MIPS_loop: |
| 5314 | return "DW_TAG_MIPS_loop"; |
| 5315 | case DW_TAG_format_label: |
| 5316 | return "DW_TAG_format_label"; |
| 5317 | case DW_TAG_function_template: |
| 5318 | return "DW_TAG_function_template"; |
| 5319 | case DW_TAG_class_template: |
| 5320 | return "DW_TAG_class_template"; |
| 5321 | default: |
| 5322 | return "DW_TAG_<unknown>"; |
| 5323 | } |
| 5324 | } |
| 5325 | |
| 5326 | /* Convert a DWARF attribute code into its string name. */ |
| 5327 | |
| 5328 | static char * |
| 5329 | dwarf_attr_name (register unsigned attr) |
| 5330 | { |
| 5331 | switch (attr) |
| 5332 | { |
| 5333 | case DW_AT_sibling: |
| 5334 | return "DW_AT_sibling"; |
| 5335 | case DW_AT_location: |
| 5336 | return "DW_AT_location"; |
| 5337 | case DW_AT_name: |
| 5338 | return "DW_AT_name"; |
| 5339 | case DW_AT_ordering: |
| 5340 | return "DW_AT_ordering"; |
| 5341 | case DW_AT_subscr_data: |
| 5342 | return "DW_AT_subscr_data"; |
| 5343 | case DW_AT_byte_size: |
| 5344 | return "DW_AT_byte_size"; |
| 5345 | case DW_AT_bit_offset: |
| 5346 | return "DW_AT_bit_offset"; |
| 5347 | case DW_AT_bit_size: |
| 5348 | return "DW_AT_bit_size"; |
| 5349 | case DW_AT_element_list: |
| 5350 | return "DW_AT_element_list"; |
| 5351 | case DW_AT_stmt_list: |
| 5352 | return "DW_AT_stmt_list"; |
| 5353 | case DW_AT_low_pc: |
| 5354 | return "DW_AT_low_pc"; |
| 5355 | case DW_AT_high_pc: |
| 5356 | return "DW_AT_high_pc"; |
| 5357 | case DW_AT_language: |
| 5358 | return "DW_AT_language"; |
| 5359 | case DW_AT_member: |
| 5360 | return "DW_AT_member"; |
| 5361 | case DW_AT_discr: |
| 5362 | return "DW_AT_discr"; |
| 5363 | case DW_AT_discr_value: |
| 5364 | return "DW_AT_discr_value"; |
| 5365 | case DW_AT_visibility: |
| 5366 | return "DW_AT_visibility"; |
| 5367 | case DW_AT_import: |
| 5368 | return "DW_AT_import"; |
| 5369 | case DW_AT_string_length: |
| 5370 | return "DW_AT_string_length"; |
| 5371 | case DW_AT_common_reference: |
| 5372 | return "DW_AT_common_reference"; |
| 5373 | case DW_AT_comp_dir: |
| 5374 | return "DW_AT_comp_dir"; |
| 5375 | case DW_AT_const_value: |
| 5376 | return "DW_AT_const_value"; |
| 5377 | case DW_AT_containing_type: |
| 5378 | return "DW_AT_containing_type"; |
| 5379 | case DW_AT_default_value: |
| 5380 | return "DW_AT_default_value"; |
| 5381 | case DW_AT_inline: |
| 5382 | return "DW_AT_inline"; |
| 5383 | case DW_AT_is_optional: |
| 5384 | return "DW_AT_is_optional"; |
| 5385 | case DW_AT_lower_bound: |
| 5386 | return "DW_AT_lower_bound"; |
| 5387 | case DW_AT_producer: |
| 5388 | return "DW_AT_producer"; |
| 5389 | case DW_AT_prototyped: |
| 5390 | return "DW_AT_prototyped"; |
| 5391 | case DW_AT_return_addr: |
| 5392 | return "DW_AT_return_addr"; |
| 5393 | case DW_AT_start_scope: |
| 5394 | return "DW_AT_start_scope"; |
| 5395 | case DW_AT_stride_size: |
| 5396 | return "DW_AT_stride_size"; |
| 5397 | case DW_AT_upper_bound: |
| 5398 | return "DW_AT_upper_bound"; |
| 5399 | case DW_AT_abstract_origin: |
| 5400 | return "DW_AT_abstract_origin"; |
| 5401 | case DW_AT_accessibility: |
| 5402 | return "DW_AT_accessibility"; |
| 5403 | case DW_AT_address_class: |
| 5404 | return "DW_AT_address_class"; |
| 5405 | case DW_AT_artificial: |
| 5406 | return "DW_AT_artificial"; |
| 5407 | case DW_AT_base_types: |
| 5408 | return "DW_AT_base_types"; |
| 5409 | case DW_AT_calling_convention: |
| 5410 | return "DW_AT_calling_convention"; |
| 5411 | case DW_AT_count: |
| 5412 | return "DW_AT_count"; |
| 5413 | case DW_AT_data_member_location: |
| 5414 | return "DW_AT_data_member_location"; |
| 5415 | case DW_AT_decl_column: |
| 5416 | return "DW_AT_decl_column"; |
| 5417 | case DW_AT_decl_file: |
| 5418 | return "DW_AT_decl_file"; |
| 5419 | case DW_AT_decl_line: |
| 5420 | return "DW_AT_decl_line"; |
| 5421 | case DW_AT_declaration: |
| 5422 | return "DW_AT_declaration"; |
| 5423 | case DW_AT_discr_list: |
| 5424 | return "DW_AT_discr_list"; |
| 5425 | case DW_AT_encoding: |
| 5426 | return "DW_AT_encoding"; |
| 5427 | case DW_AT_external: |
| 5428 | return "DW_AT_external"; |
| 5429 | case DW_AT_frame_base: |
| 5430 | return "DW_AT_frame_base"; |
| 5431 | case DW_AT_friend: |
| 5432 | return "DW_AT_friend"; |
| 5433 | case DW_AT_identifier_case: |
| 5434 | return "DW_AT_identifier_case"; |
| 5435 | case DW_AT_macro_info: |
| 5436 | return "DW_AT_macro_info"; |
| 5437 | case DW_AT_namelist_items: |
| 5438 | return "DW_AT_namelist_items"; |
| 5439 | case DW_AT_priority: |
| 5440 | return "DW_AT_priority"; |
| 5441 | case DW_AT_segment: |
| 5442 | return "DW_AT_segment"; |
| 5443 | case DW_AT_specification: |
| 5444 | return "DW_AT_specification"; |
| 5445 | case DW_AT_static_link: |
| 5446 | return "DW_AT_static_link"; |
| 5447 | case DW_AT_type: |
| 5448 | return "DW_AT_type"; |
| 5449 | case DW_AT_use_location: |
| 5450 | return "DW_AT_use_location"; |
| 5451 | case DW_AT_variable_parameter: |
| 5452 | return "DW_AT_variable_parameter"; |
| 5453 | case DW_AT_virtuality: |
| 5454 | return "DW_AT_virtuality"; |
| 5455 | case DW_AT_vtable_elem_location: |
| 5456 | return "DW_AT_vtable_elem_location"; |
| 5457 | |
| 5458 | #ifdef MIPS |
| 5459 | case DW_AT_MIPS_fde: |
| 5460 | return "DW_AT_MIPS_fde"; |
| 5461 | case DW_AT_MIPS_loop_begin: |
| 5462 | return "DW_AT_MIPS_loop_begin"; |
| 5463 | case DW_AT_MIPS_tail_loop_begin: |
| 5464 | return "DW_AT_MIPS_tail_loop_begin"; |
| 5465 | case DW_AT_MIPS_epilog_begin: |
| 5466 | return "DW_AT_MIPS_epilog_begin"; |
| 5467 | case DW_AT_MIPS_loop_unroll_factor: |
| 5468 | return "DW_AT_MIPS_loop_unroll_factor"; |
| 5469 | case DW_AT_MIPS_software_pipeline_depth: |
| 5470 | return "DW_AT_MIPS_software_pipeline_depth"; |
| 5471 | case DW_AT_MIPS_linkage_name: |
| 5472 | return "DW_AT_MIPS_linkage_name"; |
| 5473 | #endif |
| 5474 | |
| 5475 | case DW_AT_sf_names: |
| 5476 | return "DW_AT_sf_names"; |
| 5477 | case DW_AT_src_info: |
| 5478 | return "DW_AT_src_info"; |
| 5479 | case DW_AT_mac_info: |
| 5480 | return "DW_AT_mac_info"; |
| 5481 | case DW_AT_src_coords: |
| 5482 | return "DW_AT_src_coords"; |
| 5483 | case DW_AT_body_begin: |
| 5484 | return "DW_AT_body_begin"; |
| 5485 | case DW_AT_body_end: |
| 5486 | return "DW_AT_body_end"; |
| 5487 | case DW_AT_GNU_vector: |
| 5488 | return "DW_AT_GNU_vector"; |
| 5489 | default: |
| 5490 | return "DW_AT_<unknown>"; |
| 5491 | } |
| 5492 | } |
| 5493 | |
| 5494 | /* Convert a DWARF value form code into its string name. */ |
| 5495 | |
| 5496 | static char * |
| 5497 | dwarf_form_name (register unsigned form) |
| 5498 | { |
| 5499 | switch (form) |
| 5500 | { |
| 5501 | case DW_FORM_addr: |
| 5502 | return "DW_FORM_addr"; |
| 5503 | case DW_FORM_block2: |
| 5504 | return "DW_FORM_block2"; |
| 5505 | case DW_FORM_block4: |
| 5506 | return "DW_FORM_block4"; |
| 5507 | case DW_FORM_data2: |
| 5508 | return "DW_FORM_data2"; |
| 5509 | case DW_FORM_data4: |
| 5510 | return "DW_FORM_data4"; |
| 5511 | case DW_FORM_data8: |
| 5512 | return "DW_FORM_data8"; |
| 5513 | case DW_FORM_string: |
| 5514 | return "DW_FORM_string"; |
| 5515 | case DW_FORM_block: |
| 5516 | return "DW_FORM_block"; |
| 5517 | case DW_FORM_block1: |
| 5518 | return "DW_FORM_block1"; |
| 5519 | case DW_FORM_data1: |
| 5520 | return "DW_FORM_data1"; |
| 5521 | case DW_FORM_flag: |
| 5522 | return "DW_FORM_flag"; |
| 5523 | case DW_FORM_sdata: |
| 5524 | return "DW_FORM_sdata"; |
| 5525 | case DW_FORM_strp: |
| 5526 | return "DW_FORM_strp"; |
| 5527 | case DW_FORM_udata: |
| 5528 | return "DW_FORM_udata"; |
| 5529 | case DW_FORM_ref_addr: |
| 5530 | return "DW_FORM_ref_addr"; |
| 5531 | case DW_FORM_ref1: |
| 5532 | return "DW_FORM_ref1"; |
| 5533 | case DW_FORM_ref2: |
| 5534 | return "DW_FORM_ref2"; |
| 5535 | case DW_FORM_ref4: |
| 5536 | return "DW_FORM_ref4"; |
| 5537 | case DW_FORM_ref8: |
| 5538 | return "DW_FORM_ref8"; |
| 5539 | case DW_FORM_ref_udata: |
| 5540 | return "DW_FORM_ref_udata"; |
| 5541 | case DW_FORM_indirect: |
| 5542 | return "DW_FORM_indirect"; |
| 5543 | default: |
| 5544 | return "DW_FORM_<unknown>"; |
| 5545 | } |
| 5546 | } |
| 5547 | |
| 5548 | /* Convert a DWARF stack opcode into its string name. */ |
| 5549 | |
| 5550 | static char * |
| 5551 | dwarf_stack_op_name (register unsigned op) |
| 5552 | { |
| 5553 | switch (op) |
| 5554 | { |
| 5555 | case DW_OP_addr: |
| 5556 | return "DW_OP_addr"; |
| 5557 | case DW_OP_deref: |
| 5558 | return "DW_OP_deref"; |
| 5559 | case DW_OP_const1u: |
| 5560 | return "DW_OP_const1u"; |
| 5561 | case DW_OP_const1s: |
| 5562 | return "DW_OP_const1s"; |
| 5563 | case DW_OP_const2u: |
| 5564 | return "DW_OP_const2u"; |
| 5565 | case DW_OP_const2s: |
| 5566 | return "DW_OP_const2s"; |
| 5567 | case DW_OP_const4u: |
| 5568 | return "DW_OP_const4u"; |
| 5569 | case DW_OP_const4s: |
| 5570 | return "DW_OP_const4s"; |
| 5571 | case DW_OP_const8u: |
| 5572 | return "DW_OP_const8u"; |
| 5573 | case DW_OP_const8s: |
| 5574 | return "DW_OP_const8s"; |
| 5575 | case DW_OP_constu: |
| 5576 | return "DW_OP_constu"; |
| 5577 | case DW_OP_consts: |
| 5578 | return "DW_OP_consts"; |
| 5579 | case DW_OP_dup: |
| 5580 | return "DW_OP_dup"; |
| 5581 | case DW_OP_drop: |
| 5582 | return "DW_OP_drop"; |
| 5583 | case DW_OP_over: |
| 5584 | return "DW_OP_over"; |
| 5585 | case DW_OP_pick: |
| 5586 | return "DW_OP_pick"; |
| 5587 | case DW_OP_swap: |
| 5588 | return "DW_OP_swap"; |
| 5589 | case DW_OP_rot: |
| 5590 | return "DW_OP_rot"; |
| 5591 | case DW_OP_xderef: |
| 5592 | return "DW_OP_xderef"; |
| 5593 | case DW_OP_abs: |
| 5594 | return "DW_OP_abs"; |
| 5595 | case DW_OP_and: |
| 5596 | return "DW_OP_and"; |
| 5597 | case DW_OP_div: |
| 5598 | return "DW_OP_div"; |
| 5599 | case DW_OP_minus: |
| 5600 | return "DW_OP_minus"; |
| 5601 | case DW_OP_mod: |
| 5602 | return "DW_OP_mod"; |
| 5603 | case DW_OP_mul: |
| 5604 | return "DW_OP_mul"; |
| 5605 | case DW_OP_neg: |
| 5606 | return "DW_OP_neg"; |
| 5607 | case DW_OP_not: |
| 5608 | return "DW_OP_not"; |
| 5609 | case DW_OP_or: |
| 5610 | return "DW_OP_or"; |
| 5611 | case DW_OP_plus: |
| 5612 | return "DW_OP_plus"; |
| 5613 | case DW_OP_plus_uconst: |
| 5614 | return "DW_OP_plus_uconst"; |
| 5615 | case DW_OP_shl: |
| 5616 | return "DW_OP_shl"; |
| 5617 | case DW_OP_shr: |
| 5618 | return "DW_OP_shr"; |
| 5619 | case DW_OP_shra: |
| 5620 | return "DW_OP_shra"; |
| 5621 | case DW_OP_xor: |
| 5622 | return "DW_OP_xor"; |
| 5623 | case DW_OP_bra: |
| 5624 | return "DW_OP_bra"; |
| 5625 | case DW_OP_eq: |
| 5626 | return "DW_OP_eq"; |
| 5627 | case DW_OP_ge: |
| 5628 | return "DW_OP_ge"; |
| 5629 | case DW_OP_gt: |
| 5630 | return "DW_OP_gt"; |
| 5631 | case DW_OP_le: |
| 5632 | return "DW_OP_le"; |
| 5633 | case DW_OP_lt: |
| 5634 | return "DW_OP_lt"; |
| 5635 | case DW_OP_ne: |
| 5636 | return "DW_OP_ne"; |
| 5637 | case DW_OP_skip: |
| 5638 | return "DW_OP_skip"; |
| 5639 | case DW_OP_lit0: |
| 5640 | return "DW_OP_lit0"; |
| 5641 | case DW_OP_lit1: |
| 5642 | return "DW_OP_lit1"; |
| 5643 | case DW_OP_lit2: |
| 5644 | return "DW_OP_lit2"; |
| 5645 | case DW_OP_lit3: |
| 5646 | return "DW_OP_lit3"; |
| 5647 | case DW_OP_lit4: |
| 5648 | return "DW_OP_lit4"; |
| 5649 | case DW_OP_lit5: |
| 5650 | return "DW_OP_lit5"; |
| 5651 | case DW_OP_lit6: |
| 5652 | return "DW_OP_lit6"; |
| 5653 | case DW_OP_lit7: |
| 5654 | return "DW_OP_lit7"; |
| 5655 | case DW_OP_lit8: |
| 5656 | return "DW_OP_lit8"; |
| 5657 | case DW_OP_lit9: |
| 5658 | return "DW_OP_lit9"; |
| 5659 | case DW_OP_lit10: |
| 5660 | return "DW_OP_lit10"; |
| 5661 | case DW_OP_lit11: |
| 5662 | return "DW_OP_lit11"; |
| 5663 | case DW_OP_lit12: |
| 5664 | return "DW_OP_lit12"; |
| 5665 | case DW_OP_lit13: |
| 5666 | return "DW_OP_lit13"; |
| 5667 | case DW_OP_lit14: |
| 5668 | return "DW_OP_lit14"; |
| 5669 | case DW_OP_lit15: |
| 5670 | return "DW_OP_lit15"; |
| 5671 | case DW_OP_lit16: |
| 5672 | return "DW_OP_lit16"; |
| 5673 | case DW_OP_lit17: |
| 5674 | return "DW_OP_lit17"; |
| 5675 | case DW_OP_lit18: |
| 5676 | return "DW_OP_lit18"; |
| 5677 | case DW_OP_lit19: |
| 5678 | return "DW_OP_lit19"; |
| 5679 | case DW_OP_lit20: |
| 5680 | return "DW_OP_lit20"; |
| 5681 | case DW_OP_lit21: |
| 5682 | return "DW_OP_lit21"; |
| 5683 | case DW_OP_lit22: |
| 5684 | return "DW_OP_lit22"; |
| 5685 | case DW_OP_lit23: |
| 5686 | return "DW_OP_lit23"; |
| 5687 | case DW_OP_lit24: |
| 5688 | return "DW_OP_lit24"; |
| 5689 | case DW_OP_lit25: |
| 5690 | return "DW_OP_lit25"; |
| 5691 | case DW_OP_lit26: |
| 5692 | return "DW_OP_lit26"; |
| 5693 | case DW_OP_lit27: |
| 5694 | return "DW_OP_lit27"; |
| 5695 | case DW_OP_lit28: |
| 5696 | return "DW_OP_lit28"; |
| 5697 | case DW_OP_lit29: |
| 5698 | return "DW_OP_lit29"; |
| 5699 | case DW_OP_lit30: |
| 5700 | return "DW_OP_lit30"; |
| 5701 | case DW_OP_lit31: |
| 5702 | return "DW_OP_lit31"; |
| 5703 | case DW_OP_reg0: |
| 5704 | return "DW_OP_reg0"; |
| 5705 | case DW_OP_reg1: |
| 5706 | return "DW_OP_reg1"; |
| 5707 | case DW_OP_reg2: |
| 5708 | return "DW_OP_reg2"; |
| 5709 | case DW_OP_reg3: |
| 5710 | return "DW_OP_reg3"; |
| 5711 | case DW_OP_reg4: |
| 5712 | return "DW_OP_reg4"; |
| 5713 | case DW_OP_reg5: |
| 5714 | return "DW_OP_reg5"; |
| 5715 | case DW_OP_reg6: |
| 5716 | return "DW_OP_reg6"; |
| 5717 | case DW_OP_reg7: |
| 5718 | return "DW_OP_reg7"; |
| 5719 | case DW_OP_reg8: |
| 5720 | return "DW_OP_reg8"; |
| 5721 | case DW_OP_reg9: |
| 5722 | return "DW_OP_reg9"; |
| 5723 | case DW_OP_reg10: |
| 5724 | return "DW_OP_reg10"; |
| 5725 | case DW_OP_reg11: |
| 5726 | return "DW_OP_reg11"; |
| 5727 | case DW_OP_reg12: |
| 5728 | return "DW_OP_reg12"; |
| 5729 | case DW_OP_reg13: |
| 5730 | return "DW_OP_reg13"; |
| 5731 | case DW_OP_reg14: |
| 5732 | return "DW_OP_reg14"; |
| 5733 | case DW_OP_reg15: |
| 5734 | return "DW_OP_reg15"; |
| 5735 | case DW_OP_reg16: |
| 5736 | return "DW_OP_reg16"; |
| 5737 | case DW_OP_reg17: |
| 5738 | return "DW_OP_reg17"; |
| 5739 | case DW_OP_reg18: |
| 5740 | return "DW_OP_reg18"; |
| 5741 | case DW_OP_reg19: |
| 5742 | return "DW_OP_reg19"; |
| 5743 | case DW_OP_reg20: |
| 5744 | return "DW_OP_reg20"; |
| 5745 | case DW_OP_reg21: |
| 5746 | return "DW_OP_reg21"; |
| 5747 | case DW_OP_reg22: |
| 5748 | return "DW_OP_reg22"; |
| 5749 | case DW_OP_reg23: |
| 5750 | return "DW_OP_reg23"; |
| 5751 | case DW_OP_reg24: |
| 5752 | return "DW_OP_reg24"; |
| 5753 | case DW_OP_reg25: |
| 5754 | return "DW_OP_reg25"; |
| 5755 | case DW_OP_reg26: |
| 5756 | return "DW_OP_reg26"; |
| 5757 | case DW_OP_reg27: |
| 5758 | return "DW_OP_reg27"; |
| 5759 | case DW_OP_reg28: |
| 5760 | return "DW_OP_reg28"; |
| 5761 | case DW_OP_reg29: |
| 5762 | return "DW_OP_reg29"; |
| 5763 | case DW_OP_reg30: |
| 5764 | return "DW_OP_reg30"; |
| 5765 | case DW_OP_reg31: |
| 5766 | return "DW_OP_reg31"; |
| 5767 | case DW_OP_breg0: |
| 5768 | return "DW_OP_breg0"; |
| 5769 | case DW_OP_breg1: |
| 5770 | return "DW_OP_breg1"; |
| 5771 | case DW_OP_breg2: |
| 5772 | return "DW_OP_breg2"; |
| 5773 | case DW_OP_breg3: |
| 5774 | return "DW_OP_breg3"; |
| 5775 | case DW_OP_breg4: |
| 5776 | return "DW_OP_breg4"; |
| 5777 | case DW_OP_breg5: |
| 5778 | return "DW_OP_breg5"; |
| 5779 | case DW_OP_breg6: |
| 5780 | return "DW_OP_breg6"; |
| 5781 | case DW_OP_breg7: |
| 5782 | return "DW_OP_breg7"; |
| 5783 | case DW_OP_breg8: |
| 5784 | return "DW_OP_breg8"; |
| 5785 | case DW_OP_breg9: |
| 5786 | return "DW_OP_breg9"; |
| 5787 | case DW_OP_breg10: |
| 5788 | return "DW_OP_breg10"; |
| 5789 | case DW_OP_breg11: |
| 5790 | return "DW_OP_breg11"; |
| 5791 | case DW_OP_breg12: |
| 5792 | return "DW_OP_breg12"; |
| 5793 | case DW_OP_breg13: |
| 5794 | return "DW_OP_breg13"; |
| 5795 | case DW_OP_breg14: |
| 5796 | return "DW_OP_breg14"; |
| 5797 | case DW_OP_breg15: |
| 5798 | return "DW_OP_breg15"; |
| 5799 | case DW_OP_breg16: |
| 5800 | return "DW_OP_breg16"; |
| 5801 | case DW_OP_breg17: |
| 5802 | return "DW_OP_breg17"; |
| 5803 | case DW_OP_breg18: |
| 5804 | return "DW_OP_breg18"; |
| 5805 | case DW_OP_breg19: |
| 5806 | return "DW_OP_breg19"; |
| 5807 | case DW_OP_breg20: |
| 5808 | return "DW_OP_breg20"; |
| 5809 | case DW_OP_breg21: |
| 5810 | return "DW_OP_breg21"; |
| 5811 | case DW_OP_breg22: |
| 5812 | return "DW_OP_breg22"; |
| 5813 | case DW_OP_breg23: |
| 5814 | return "DW_OP_breg23"; |
| 5815 | case DW_OP_breg24: |
| 5816 | return "DW_OP_breg24"; |
| 5817 | case DW_OP_breg25: |
| 5818 | return "DW_OP_breg25"; |
| 5819 | case DW_OP_breg26: |
| 5820 | return "DW_OP_breg26"; |
| 5821 | case DW_OP_breg27: |
| 5822 | return "DW_OP_breg27"; |
| 5823 | case DW_OP_breg28: |
| 5824 | return "DW_OP_breg28"; |
| 5825 | case DW_OP_breg29: |
| 5826 | return "DW_OP_breg29"; |
| 5827 | case DW_OP_breg30: |
| 5828 | return "DW_OP_breg30"; |
| 5829 | case DW_OP_breg31: |
| 5830 | return "DW_OP_breg31"; |
| 5831 | case DW_OP_regx: |
| 5832 | return "DW_OP_regx"; |
| 5833 | case DW_OP_fbreg: |
| 5834 | return "DW_OP_fbreg"; |
| 5835 | case DW_OP_bregx: |
| 5836 | return "DW_OP_bregx"; |
| 5837 | case DW_OP_piece: |
| 5838 | return "DW_OP_piece"; |
| 5839 | case DW_OP_deref_size: |
| 5840 | return "DW_OP_deref_size"; |
| 5841 | case DW_OP_xderef_size: |
| 5842 | return "DW_OP_xderef_size"; |
| 5843 | case DW_OP_nop: |
| 5844 | return "DW_OP_nop"; |
| 5845 | default: |
| 5846 | return "OP_<unknown>"; |
| 5847 | } |
| 5848 | } |
| 5849 | |
| 5850 | static char * |
| 5851 | dwarf_bool_name (unsigned mybool) |
| 5852 | { |
| 5853 | if (mybool) |
| 5854 | return "TRUE"; |
| 5855 | else |
| 5856 | return "FALSE"; |
| 5857 | } |
| 5858 | |
| 5859 | /* Convert a DWARF type code into its string name. */ |
| 5860 | |
| 5861 | static char * |
| 5862 | dwarf_type_encoding_name (register unsigned enc) |
| 5863 | { |
| 5864 | switch (enc) |
| 5865 | { |
| 5866 | case DW_ATE_address: |
| 5867 | return "DW_ATE_address"; |
| 5868 | case DW_ATE_boolean: |
| 5869 | return "DW_ATE_boolean"; |
| 5870 | case DW_ATE_complex_float: |
| 5871 | return "DW_ATE_complex_float"; |
| 5872 | case DW_ATE_float: |
| 5873 | return "DW_ATE_float"; |
| 5874 | case DW_ATE_signed: |
| 5875 | return "DW_ATE_signed"; |
| 5876 | case DW_ATE_signed_char: |
| 5877 | return "DW_ATE_signed_char"; |
| 5878 | case DW_ATE_unsigned: |
| 5879 | return "DW_ATE_unsigned"; |
| 5880 | case DW_ATE_unsigned_char: |
| 5881 | return "DW_ATE_unsigned_char"; |
| 5882 | default: |
| 5883 | return "DW_ATE_<unknown>"; |
| 5884 | } |
| 5885 | } |
| 5886 | |
| 5887 | /* Convert a DWARF call frame info operation to its string name. */ |
| 5888 | |
| 5889 | #if 0 |
| 5890 | static char * |
| 5891 | dwarf_cfi_name (register unsigned cfi_opc) |
| 5892 | { |
| 5893 | switch (cfi_opc) |
| 5894 | { |
| 5895 | case DW_CFA_advance_loc: |
| 5896 | return "DW_CFA_advance_loc"; |
| 5897 | case DW_CFA_offset: |
| 5898 | return "DW_CFA_offset"; |
| 5899 | case DW_CFA_restore: |
| 5900 | return "DW_CFA_restore"; |
| 5901 | case DW_CFA_nop: |
| 5902 | return "DW_CFA_nop"; |
| 5903 | case DW_CFA_set_loc: |
| 5904 | return "DW_CFA_set_loc"; |
| 5905 | case DW_CFA_advance_loc1: |
| 5906 | return "DW_CFA_advance_loc1"; |
| 5907 | case DW_CFA_advance_loc2: |
| 5908 | return "DW_CFA_advance_loc2"; |
| 5909 | case DW_CFA_advance_loc4: |
| 5910 | return "DW_CFA_advance_loc4"; |
| 5911 | case DW_CFA_offset_extended: |
| 5912 | return "DW_CFA_offset_extended"; |
| 5913 | case DW_CFA_restore_extended: |
| 5914 | return "DW_CFA_restore_extended"; |
| 5915 | case DW_CFA_undefined: |
| 5916 | return "DW_CFA_undefined"; |
| 5917 | case DW_CFA_same_value: |
| 5918 | return "DW_CFA_same_value"; |
| 5919 | case DW_CFA_register: |
| 5920 | return "DW_CFA_register"; |
| 5921 | case DW_CFA_remember_state: |
| 5922 | return "DW_CFA_remember_state"; |
| 5923 | case DW_CFA_restore_state: |
| 5924 | return "DW_CFA_restore_state"; |
| 5925 | case DW_CFA_def_cfa: |
| 5926 | return "DW_CFA_def_cfa"; |
| 5927 | case DW_CFA_def_cfa_register: |
| 5928 | return "DW_CFA_def_cfa_register"; |
| 5929 | case DW_CFA_def_cfa_offset: |
| 5930 | return "DW_CFA_def_cfa_offset"; |
| 5931 | |
| 5932 | /* DWARF 3 */ |
| 5933 | case DW_CFA_def_cfa_expression: |
| 5934 | return "DW_CFA_def_cfa_expression"; |
| 5935 | case DW_CFA_expression: |
| 5936 | return "DW_CFA_expression"; |
| 5937 | case DW_CFA_offset_extended_sf: |
| 5938 | return "DW_CFA_offset_extended_sf"; |
| 5939 | case DW_CFA_def_cfa_sf: |
| 5940 | return "DW_CFA_def_cfa_sf"; |
| 5941 | case DW_CFA_def_cfa_offset_sf: |
| 5942 | return "DW_CFA_def_cfa_offset_sf"; |
| 5943 | |
| 5944 | /* SGI/MIPS specific */ |
| 5945 | case DW_CFA_MIPS_advance_loc8: |
| 5946 | return "DW_CFA_MIPS_advance_loc8"; |
| 5947 | |
| 5948 | /* GNU extensions */ |
| 5949 | case DW_CFA_GNU_window_save: |
| 5950 | return "DW_CFA_GNU_window_save"; |
| 5951 | case DW_CFA_GNU_args_size: |
| 5952 | return "DW_CFA_GNU_args_size"; |
| 5953 | case DW_CFA_GNU_negative_offset_extended: |
| 5954 | return "DW_CFA_GNU_negative_offset_extended"; |
| 5955 | |
| 5956 | default: |
| 5957 | return "DW_CFA_<unknown>"; |
| 5958 | } |
| 5959 | } |
| 5960 | #endif |
| 5961 | |
| 5962 | static void |
| 5963 | dump_die (struct die_info *die) |
| 5964 | { |
| 5965 | unsigned int i; |
| 5966 | |
| 5967 | fprintf_unfiltered (gdb_stderr, "Die: %s (abbrev = %d, offset = %d)\n", |
| 5968 | dwarf_tag_name (die->tag), die->abbrev, die->offset); |
| 5969 | fprintf_unfiltered (gdb_stderr, "\thas children: %s\n", |
| 5970 | dwarf_bool_name (die->has_children)); |
| 5971 | |
| 5972 | fprintf_unfiltered (gdb_stderr, "\tattributes:\n"); |
| 5973 | for (i = 0; i < die->num_attrs; ++i) |
| 5974 | { |
| 5975 | fprintf_unfiltered (gdb_stderr, "\t\t%s (%s) ", |
| 5976 | dwarf_attr_name (die->attrs[i].name), |
| 5977 | dwarf_form_name (die->attrs[i].form)); |
| 5978 | switch (die->attrs[i].form) |
| 5979 | { |
| 5980 | case DW_FORM_ref_addr: |
| 5981 | case DW_FORM_addr: |
| 5982 | fprintf_unfiltered (gdb_stderr, "address: "); |
| 5983 | print_address_numeric (DW_ADDR (&die->attrs[i]), 1, gdb_stderr); |
| 5984 | break; |
| 5985 | case DW_FORM_block2: |
| 5986 | case DW_FORM_block4: |
| 5987 | case DW_FORM_block: |
| 5988 | case DW_FORM_block1: |
| 5989 | fprintf_unfiltered (gdb_stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size); |
| 5990 | break; |
| 5991 | case DW_FORM_data1: |
| 5992 | case DW_FORM_data2: |
| 5993 | case DW_FORM_data4: |
| 5994 | case DW_FORM_data8: |
| 5995 | case DW_FORM_ref1: |
| 5996 | case DW_FORM_ref2: |
| 5997 | case DW_FORM_ref4: |
| 5998 | case DW_FORM_udata: |
| 5999 | case DW_FORM_sdata: |
| 6000 | fprintf_unfiltered (gdb_stderr, "constant: %ld", DW_UNSND (&die->attrs[i])); |
| 6001 | break; |
| 6002 | case DW_FORM_string: |
| 6003 | case DW_FORM_strp: |
| 6004 | fprintf_unfiltered (gdb_stderr, "string: \"%s\"", |
| 6005 | DW_STRING (&die->attrs[i]) |
| 6006 | ? DW_STRING (&die->attrs[i]) : ""); |
| 6007 | break; |
| 6008 | case DW_FORM_flag: |
| 6009 | if (DW_UNSND (&die->attrs[i])) |
| 6010 | fprintf_unfiltered (gdb_stderr, "flag: TRUE"); |
| 6011 | else |
| 6012 | fprintf_unfiltered (gdb_stderr, "flag: FALSE"); |
| 6013 | break; |
| 6014 | case DW_FORM_indirect: |
| 6015 | /* the reader will have reduced the indirect form to |
| 6016 | the "base form" so this form should not occur */ |
| 6017 | fprintf_unfiltered (gdb_stderr, "unexpected attribute form: DW_FORM_indirect"); |
| 6018 | break; |
| 6019 | default: |
| 6020 | fprintf_unfiltered (gdb_stderr, "unsupported attribute form: %d.", |
| 6021 | die->attrs[i].form); |
| 6022 | } |
| 6023 | fprintf_unfiltered (gdb_stderr, "\n"); |
| 6024 | } |
| 6025 | } |
| 6026 | |
| 6027 | static void |
| 6028 | dump_die_list (struct die_info *die) |
| 6029 | { |
| 6030 | while (die) |
| 6031 | { |
| 6032 | dump_die (die); |
| 6033 | die = die->next; |
| 6034 | } |
| 6035 | } |
| 6036 | |
| 6037 | static void |
| 6038 | store_in_ref_table (unsigned int offset, struct die_info *die) |
| 6039 | { |
| 6040 | int h; |
| 6041 | struct die_info *old; |
| 6042 | |
| 6043 | h = (offset % REF_HASH_SIZE); |
| 6044 | old = die_ref_table[h]; |
| 6045 | die->next_ref = old; |
| 6046 | die_ref_table[h] = die; |
| 6047 | } |
| 6048 | |
| 6049 | |
| 6050 | static void |
| 6051 | dwarf2_empty_hash_tables (void) |
| 6052 | { |
| 6053 | memset (die_ref_table, 0, sizeof (die_ref_table)); |
| 6054 | } |
| 6055 | |
| 6056 | static unsigned int |
| 6057 | dwarf2_get_ref_die_offset (struct attribute *attr) |
| 6058 | { |
| 6059 | unsigned int result = 0; |
| 6060 | |
| 6061 | switch (attr->form) |
| 6062 | { |
| 6063 | case DW_FORM_ref_addr: |
| 6064 | result = DW_ADDR (attr); |
| 6065 | break; |
| 6066 | case DW_FORM_ref1: |
| 6067 | case DW_FORM_ref2: |
| 6068 | case DW_FORM_ref4: |
| 6069 | case DW_FORM_ref8: |
| 6070 | case DW_FORM_ref_udata: |
| 6071 | result = cu_header_offset + DW_UNSND (attr); |
| 6072 | break; |
| 6073 | default: |
| 6074 | complain (&dwarf2_unsupported_die_ref_attr, dwarf_form_name (attr->form)); |
| 6075 | } |
| 6076 | return result; |
| 6077 | } |
| 6078 | |
| 6079 | static struct die_info * |
| 6080 | follow_die_ref (unsigned int offset) |
| 6081 | { |
| 6082 | struct die_info *die; |
| 6083 | int h; |
| 6084 | |
| 6085 | h = (offset % REF_HASH_SIZE); |
| 6086 | die = die_ref_table[h]; |
| 6087 | while (die) |
| 6088 | { |
| 6089 | if (die->offset == offset) |
| 6090 | { |
| 6091 | return die; |
| 6092 | } |
| 6093 | die = die->next_ref; |
| 6094 | } |
| 6095 | return NULL; |
| 6096 | } |
| 6097 | |
| 6098 | static struct type * |
| 6099 | dwarf2_fundamental_type (struct objfile *objfile, int typeid) |
| 6100 | { |
| 6101 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) |
| 6102 | { |
| 6103 | error ("Dwarf Error: internal error - invalid fundamental type id %d.", |
| 6104 | typeid); |
| 6105 | } |
| 6106 | |
| 6107 | /* Look for this particular type in the fundamental type vector. If |
| 6108 | one is not found, create and install one appropriate for the |
| 6109 | current language and the current target machine. */ |
| 6110 | |
| 6111 | if (ftypes[typeid] == NULL) |
| 6112 | { |
| 6113 | ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid); |
| 6114 | } |
| 6115 | |
| 6116 | return (ftypes[typeid]); |
| 6117 | } |
| 6118 | |
| 6119 | /* Decode simple location descriptions. |
| 6120 | Given a pointer to a dwarf block that defines a location, compute |
| 6121 | the location and return the value. |
| 6122 | |
| 6123 | FIXME: This is a kludge until we figure out a better |
| 6124 | way to handle the location descriptions. |
| 6125 | Gdb's design does not mesh well with the DWARF2 notion of a location |
| 6126 | computing interpreter, which is a shame because the flexibility goes unused. |
| 6127 | FIXME: Implement more operations as necessary. |
| 6128 | |
| 6129 | A location description containing no operations indicates that the |
| 6130 | object is optimized out. The global optimized_out flag is set for |
| 6131 | those, the return value is meaningless. |
| 6132 | |
| 6133 | When the result is a register number, the global isreg flag is set, |
| 6134 | otherwise it is cleared. |
| 6135 | |
| 6136 | When the result is a base register offset, the global offreg flag is set |
| 6137 | and the register number is returned in basereg, otherwise it is cleared. |
| 6138 | |
| 6139 | When the DW_OP_fbreg operation is encountered without a corresponding |
| 6140 | DW_AT_frame_base attribute, the global islocal flag is set. |
| 6141 | Hopefully the machine dependent code knows how to set up a virtual |
| 6142 | frame pointer for the local references. |
| 6143 | |
| 6144 | Note that stack[0] is unused except as a default error return. |
| 6145 | Note that stack overflow is not yet handled. */ |
| 6146 | |
| 6147 | static CORE_ADDR |
| 6148 | decode_locdesc (struct dwarf_block *blk, struct objfile *objfile, |
| 6149 | const struct comp_unit_head *cu_header) |
| 6150 | { |
| 6151 | int i; |
| 6152 | int size = blk->size; |
| 6153 | char *data = blk->data; |
| 6154 | CORE_ADDR stack[64]; |
| 6155 | int stacki; |
| 6156 | unsigned int bytes_read, unsnd; |
| 6157 | unsigned char op; |
| 6158 | |
| 6159 | i = 0; |
| 6160 | stacki = 0; |
| 6161 | stack[stacki] = 0; |
| 6162 | isreg = 0; |
| 6163 | offreg = 0; |
| 6164 | isderef = 0; |
| 6165 | islocal = 0; |
| 6166 | optimized_out = 1; |
| 6167 | |
| 6168 | while (i < size) |
| 6169 | { |
| 6170 | optimized_out = 0; |
| 6171 | op = data[i++]; |
| 6172 | switch (op) |
| 6173 | { |
| 6174 | case DW_OP_lit0: |
| 6175 | case DW_OP_lit1: |
| 6176 | case DW_OP_lit2: |
| 6177 | case DW_OP_lit3: |
| 6178 | case DW_OP_lit4: |
| 6179 | case DW_OP_lit5: |
| 6180 | case DW_OP_lit6: |
| 6181 | case DW_OP_lit7: |
| 6182 | case DW_OP_lit8: |
| 6183 | case DW_OP_lit9: |
| 6184 | case DW_OP_lit10: |
| 6185 | case DW_OP_lit11: |
| 6186 | case DW_OP_lit12: |
| 6187 | case DW_OP_lit13: |
| 6188 | case DW_OP_lit14: |
| 6189 | case DW_OP_lit15: |
| 6190 | case DW_OP_lit16: |
| 6191 | case DW_OP_lit17: |
| 6192 | case DW_OP_lit18: |
| 6193 | case DW_OP_lit19: |
| 6194 | case DW_OP_lit20: |
| 6195 | case DW_OP_lit21: |
| 6196 | case DW_OP_lit22: |
| 6197 | case DW_OP_lit23: |
| 6198 | case DW_OP_lit24: |
| 6199 | case DW_OP_lit25: |
| 6200 | case DW_OP_lit26: |
| 6201 | case DW_OP_lit27: |
| 6202 | case DW_OP_lit28: |
| 6203 | case DW_OP_lit29: |
| 6204 | case DW_OP_lit30: |
| 6205 | case DW_OP_lit31: |
| 6206 | stack[++stacki] = op - DW_OP_lit0; |
| 6207 | break; |
| 6208 | |
| 6209 | case DW_OP_reg0: |
| 6210 | case DW_OP_reg1: |
| 6211 | case DW_OP_reg2: |
| 6212 | case DW_OP_reg3: |
| 6213 | case DW_OP_reg4: |
| 6214 | case DW_OP_reg5: |
| 6215 | case DW_OP_reg6: |
| 6216 | case DW_OP_reg7: |
| 6217 | case DW_OP_reg8: |
| 6218 | case DW_OP_reg9: |
| 6219 | case DW_OP_reg10: |
| 6220 | case DW_OP_reg11: |
| 6221 | case DW_OP_reg12: |
| 6222 | case DW_OP_reg13: |
| 6223 | case DW_OP_reg14: |
| 6224 | case DW_OP_reg15: |
| 6225 | case DW_OP_reg16: |
| 6226 | case DW_OP_reg17: |
| 6227 | case DW_OP_reg18: |
| 6228 | case DW_OP_reg19: |
| 6229 | case DW_OP_reg20: |
| 6230 | case DW_OP_reg21: |
| 6231 | case DW_OP_reg22: |
| 6232 | case DW_OP_reg23: |
| 6233 | case DW_OP_reg24: |
| 6234 | case DW_OP_reg25: |
| 6235 | case DW_OP_reg26: |
| 6236 | case DW_OP_reg27: |
| 6237 | case DW_OP_reg28: |
| 6238 | case DW_OP_reg29: |
| 6239 | case DW_OP_reg30: |
| 6240 | case DW_OP_reg31: |
| 6241 | isreg = 1; |
| 6242 | stack[++stacki] = op - DW_OP_reg0; |
| 6243 | break; |
| 6244 | |
| 6245 | case DW_OP_regx: |
| 6246 | isreg = 1; |
| 6247 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); |
| 6248 | i += bytes_read; |
| 6249 | #if defined(HARRIS_TARGET) && defined(_M88K) |
| 6250 | /* The Harris 88110 gdb ports have long kept their special reg |
| 6251 | numbers between their gp-regs and their x-regs. This is |
| 6252 | not how our dwarf is generated. Punt. */ |
| 6253 | unsnd += 6; |
| 6254 | #endif |
| 6255 | stack[++stacki] = unsnd; |
| 6256 | break; |
| 6257 | |
| 6258 | case DW_OP_breg0: |
| 6259 | case DW_OP_breg1: |
| 6260 | case DW_OP_breg2: |
| 6261 | case DW_OP_breg3: |
| 6262 | case DW_OP_breg4: |
| 6263 | case DW_OP_breg5: |
| 6264 | case DW_OP_breg6: |
| 6265 | case DW_OP_breg7: |
| 6266 | case DW_OP_breg8: |
| 6267 | case DW_OP_breg9: |
| 6268 | case DW_OP_breg10: |
| 6269 | case DW_OP_breg11: |
| 6270 | case DW_OP_breg12: |
| 6271 | case DW_OP_breg13: |
| 6272 | case DW_OP_breg14: |
| 6273 | case DW_OP_breg15: |
| 6274 | case DW_OP_breg16: |
| 6275 | case DW_OP_breg17: |
| 6276 | case DW_OP_breg18: |
| 6277 | case DW_OP_breg19: |
| 6278 | case DW_OP_breg20: |
| 6279 | case DW_OP_breg21: |
| 6280 | case DW_OP_breg22: |
| 6281 | case DW_OP_breg23: |
| 6282 | case DW_OP_breg24: |
| 6283 | case DW_OP_breg25: |
| 6284 | case DW_OP_breg26: |
| 6285 | case DW_OP_breg27: |
| 6286 | case DW_OP_breg28: |
| 6287 | case DW_OP_breg29: |
| 6288 | case DW_OP_breg30: |
| 6289 | case DW_OP_breg31: |
| 6290 | offreg = 1; |
| 6291 | basereg = op - DW_OP_breg0; |
| 6292 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); |
| 6293 | i += bytes_read; |
| 6294 | break; |
| 6295 | |
| 6296 | case DW_OP_bregx: |
| 6297 | offreg = 1; |
| 6298 | basereg = read_unsigned_leb128 (NULL, (data + i), &bytes_read); |
| 6299 | i += bytes_read; |
| 6300 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); |
| 6301 | i += bytes_read; |
| 6302 | break; |
| 6303 | |
| 6304 | case DW_OP_fbreg: |
| 6305 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); |
| 6306 | i += bytes_read; |
| 6307 | if (frame_base_reg >= 0) |
| 6308 | { |
| 6309 | offreg = 1; |
| 6310 | basereg = frame_base_reg; |
| 6311 | stack[stacki] += frame_base_offset; |
| 6312 | } |
| 6313 | else |
| 6314 | { |
| 6315 | complain (&dwarf2_missing_at_frame_base); |
| 6316 | islocal = 1; |
| 6317 | } |
| 6318 | break; |
| 6319 | |
| 6320 | case DW_OP_addr: |
| 6321 | stack[++stacki] = read_address (objfile->obfd, &data[i], |
| 6322 | cu_header, &bytes_read); |
| 6323 | i += bytes_read; |
| 6324 | break; |
| 6325 | |
| 6326 | case DW_OP_const1u: |
| 6327 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); |
| 6328 | i += 1; |
| 6329 | break; |
| 6330 | |
| 6331 | case DW_OP_const1s: |
| 6332 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); |
| 6333 | i += 1; |
| 6334 | break; |
| 6335 | |
| 6336 | case DW_OP_const2u: |
| 6337 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); |
| 6338 | i += 2; |
| 6339 | break; |
| 6340 | |
| 6341 | case DW_OP_const2s: |
| 6342 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); |
| 6343 | i += 2; |
| 6344 | break; |
| 6345 | |
| 6346 | case DW_OP_const4u: |
| 6347 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); |
| 6348 | i += 4; |
| 6349 | break; |
| 6350 | |
| 6351 | case DW_OP_const4s: |
| 6352 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); |
| 6353 | i += 4; |
| 6354 | break; |
| 6355 | |
| 6356 | case DW_OP_constu: |
| 6357 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), |
| 6358 | &bytes_read); |
| 6359 | i += bytes_read; |
| 6360 | break; |
| 6361 | |
| 6362 | case DW_OP_consts: |
| 6363 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); |
| 6364 | i += bytes_read; |
| 6365 | break; |
| 6366 | |
| 6367 | case DW_OP_dup: |
| 6368 | stack[stacki + 1] = stack[stacki]; |
| 6369 | stacki++; |
| 6370 | break; |
| 6371 | |
| 6372 | case DW_OP_plus: |
| 6373 | stack[stacki - 1] += stack[stacki]; |
| 6374 | stacki--; |
| 6375 | break; |
| 6376 | |
| 6377 | case DW_OP_plus_uconst: |
| 6378 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read); |
| 6379 | i += bytes_read; |
| 6380 | break; |
| 6381 | |
| 6382 | case DW_OP_minus: |
| 6383 | stack[stacki - 1] -= stack[stacki]; |
| 6384 | stacki--; |
| 6385 | break; |
| 6386 | |
| 6387 | case DW_OP_deref: |
| 6388 | isderef = 1; |
| 6389 | /* If we're not the last op, then we definitely can't encode |
| 6390 | this using GDB's address_class enum. */ |
| 6391 | if (i < size) |
| 6392 | complain (&dwarf2_complex_location_expr); |
| 6393 | break; |
| 6394 | |
| 6395 | default: |
| 6396 | complain (&dwarf2_unsupported_stack_op, dwarf_stack_op_name (op)); |
| 6397 | return (stack[stacki]); |
| 6398 | } |
| 6399 | } |
| 6400 | return (stack[stacki]); |
| 6401 | } |
| 6402 | |
| 6403 | /* memory allocation interface */ |
| 6404 | |
| 6405 | /* ARGSUSED */ |
| 6406 | static void |
| 6407 | dwarf2_free_tmp_obstack (PTR ignore) |
| 6408 | { |
| 6409 | obstack_free (&dwarf2_tmp_obstack, NULL); |
| 6410 | } |
| 6411 | |
| 6412 | static struct dwarf_block * |
| 6413 | dwarf_alloc_block (void) |
| 6414 | { |
| 6415 | struct dwarf_block *blk; |
| 6416 | |
| 6417 | blk = (struct dwarf_block *) |
| 6418 | obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct dwarf_block)); |
| 6419 | return (blk); |
| 6420 | } |
| 6421 | |
| 6422 | static struct abbrev_info * |
| 6423 | dwarf_alloc_abbrev (void) |
| 6424 | { |
| 6425 | struct abbrev_info *abbrev; |
| 6426 | |
| 6427 | abbrev = (struct abbrev_info *) xmalloc (sizeof (struct abbrev_info)); |
| 6428 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
| 6429 | return (abbrev); |
| 6430 | } |
| 6431 | |
| 6432 | static struct die_info * |
| 6433 | dwarf_alloc_die (void) |
| 6434 | { |
| 6435 | struct die_info *die; |
| 6436 | |
| 6437 | die = (struct die_info *) xmalloc (sizeof (struct die_info)); |
| 6438 | memset (die, 0, sizeof (struct die_info)); |
| 6439 | return (die); |
| 6440 | } |
| 6441 | |
| 6442 | \f |
| 6443 | /* Macro support. */ |
| 6444 | |
| 6445 | |
| 6446 | /* Return the full name of file number I in *LH's file name table. |
| 6447 | Use COMP_DIR as the name of the current directory of the |
| 6448 | compilation. The result is allocated using xmalloc; the caller is |
| 6449 | responsible for freeing it. */ |
| 6450 | static char * |
| 6451 | file_full_name (int file, struct line_header *lh, const char *comp_dir) |
| 6452 | { |
| 6453 | struct file_entry *fe = &lh->file_names[file - 1]; |
| 6454 | |
| 6455 | if (IS_ABSOLUTE_PATH (fe->name)) |
| 6456 | return xstrdup (fe->name); |
| 6457 | else |
| 6458 | { |
| 6459 | const char *dir; |
| 6460 | int dir_len; |
| 6461 | char *full_name; |
| 6462 | |
| 6463 | if (fe->dir_index) |
| 6464 | dir = lh->include_dirs[fe->dir_index - 1]; |
| 6465 | else |
| 6466 | dir = comp_dir; |
| 6467 | |
| 6468 | if (dir) |
| 6469 | { |
| 6470 | dir_len = strlen (dir); |
| 6471 | full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1); |
| 6472 | strcpy (full_name, dir); |
| 6473 | full_name[dir_len] = '/'; |
| 6474 | strcpy (full_name + dir_len + 1, fe->name); |
| 6475 | return full_name; |
| 6476 | } |
| 6477 | else |
| 6478 | return xstrdup (fe->name); |
| 6479 | } |
| 6480 | } |
| 6481 | |
| 6482 | |
| 6483 | static struct macro_source_file * |
| 6484 | macro_start_file (int file, int line, |
| 6485 | struct macro_source_file *current_file, |
| 6486 | const char *comp_dir, |
| 6487 | struct line_header *lh, struct objfile *objfile) |
| 6488 | { |
| 6489 | /* The full name of this source file. */ |
| 6490 | char *full_name = file_full_name (file, lh, comp_dir); |
| 6491 | |
| 6492 | /* We don't create a macro table for this compilation unit |
| 6493 | at all until we actually get a filename. */ |
| 6494 | if (! pending_macros) |
| 6495 | pending_macros = new_macro_table (&objfile->symbol_obstack, |
| 6496 | &objfile->macro_cache); |
| 6497 | |
| 6498 | if (! current_file) |
| 6499 | /* If we have no current file, then this must be the start_file |
| 6500 | directive for the compilation unit's main source file. */ |
| 6501 | current_file = macro_set_main (pending_macros, full_name); |
| 6502 | else |
| 6503 | current_file = macro_include (current_file, line, full_name); |
| 6504 | |
| 6505 | xfree (full_name); |
| 6506 | |
| 6507 | return current_file; |
| 6508 | } |
| 6509 | |
| 6510 | |
| 6511 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, |
| 6512 | followed by a null byte. */ |
| 6513 | static char * |
| 6514 | copy_string (const char *buf, int len) |
| 6515 | { |
| 6516 | char *s = xmalloc (len + 1); |
| 6517 | memcpy (s, buf, len); |
| 6518 | s[len] = '\0'; |
| 6519 | |
| 6520 | return s; |
| 6521 | } |
| 6522 | |
| 6523 | |
| 6524 | static const char * |
| 6525 | consume_improper_spaces (const char *p, const char *body) |
| 6526 | { |
| 6527 | if (*p == ' ') |
| 6528 | { |
| 6529 | complain (&dwarf2_macro_spaces_in_definition, body); |
| 6530 | |
| 6531 | while (*p == ' ') |
| 6532 | p++; |
| 6533 | } |
| 6534 | |
| 6535 | return p; |
| 6536 | } |
| 6537 | |
| 6538 | |
| 6539 | static void |
| 6540 | parse_macro_definition (struct macro_source_file *file, int line, |
| 6541 | const char *body) |
| 6542 | { |
| 6543 | const char *p; |
| 6544 | |
| 6545 | /* The body string takes one of two forms. For object-like macro |
| 6546 | definitions, it should be: |
| 6547 | |
| 6548 | <macro name> " " <definition> |
| 6549 | |
| 6550 | For function-like macro definitions, it should be: |
| 6551 | |
| 6552 | <macro name> "() " <definition> |
| 6553 | or |
| 6554 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> |
| 6555 | |
| 6556 | Spaces may appear only where explicitly indicated, and in the |
| 6557 | <definition>. |
| 6558 | |
| 6559 | The Dwarf 2 spec says that an object-like macro's name is always |
| 6560 | followed by a space, but versions of GCC around March 2002 omit |
| 6561 | the space when the macro's definition is the empty string. |
| 6562 | |
| 6563 | The Dwarf 2 spec says that there should be no spaces between the |
| 6564 | formal arguments in a function-like macro's formal argument list, |
| 6565 | but versions of GCC around March 2002 include spaces after the |
| 6566 | commas. */ |
| 6567 | |
| 6568 | |
| 6569 | /* Find the extent of the macro name. The macro name is terminated |
| 6570 | by either a space or null character (for an object-like macro) or |
| 6571 | an opening paren (for a function-like macro). */ |
| 6572 | for (p = body; *p; p++) |
| 6573 | if (*p == ' ' || *p == '(') |
| 6574 | break; |
| 6575 | |
| 6576 | if (*p == ' ' || *p == '\0') |
| 6577 | { |
| 6578 | /* It's an object-like macro. */ |
| 6579 | int name_len = p - body; |
| 6580 | char *name = copy_string (body, name_len); |
| 6581 | const char *replacement; |
| 6582 | |
| 6583 | if (*p == ' ') |
| 6584 | replacement = body + name_len + 1; |
| 6585 | else |
| 6586 | { |
| 6587 | complain (&dwarf2_macro_malformed_definition, body); |
| 6588 | replacement = body + name_len; |
| 6589 | } |
| 6590 | |
| 6591 | macro_define_object (file, line, name, replacement); |
| 6592 | |
| 6593 | xfree (name); |
| 6594 | } |
| 6595 | else if (*p == '(') |
| 6596 | { |
| 6597 | /* It's a function-like macro. */ |
| 6598 | char *name = copy_string (body, p - body); |
| 6599 | int argc = 0; |
| 6600 | int argv_size = 1; |
| 6601 | char **argv = xmalloc (argv_size * sizeof (*argv)); |
| 6602 | |
| 6603 | p++; |
| 6604 | |
| 6605 | p = consume_improper_spaces (p, body); |
| 6606 | |
| 6607 | /* Parse the formal argument list. */ |
| 6608 | while (*p && *p != ')') |
| 6609 | { |
| 6610 | /* Find the extent of the current argument name. */ |
| 6611 | const char *arg_start = p; |
| 6612 | |
| 6613 | while (*p && *p != ',' && *p != ')' && *p != ' ') |
| 6614 | p++; |
| 6615 | |
| 6616 | if (! *p || p == arg_start) |
| 6617 | complain (&dwarf2_macro_malformed_definition, |
| 6618 | body); |
| 6619 | else |
| 6620 | { |
| 6621 | /* Make sure argv has room for the new argument. */ |
| 6622 | if (argc >= argv_size) |
| 6623 | { |
| 6624 | argv_size *= 2; |
| 6625 | argv = xrealloc (argv, argv_size * sizeof (*argv)); |
| 6626 | } |
| 6627 | |
| 6628 | argv[argc++] = copy_string (arg_start, p - arg_start); |
| 6629 | } |
| 6630 | |
| 6631 | p = consume_improper_spaces (p, body); |
| 6632 | |
| 6633 | /* Consume the comma, if present. */ |
| 6634 | if (*p == ',') |
| 6635 | { |
| 6636 | p++; |
| 6637 | |
| 6638 | p = consume_improper_spaces (p, body); |
| 6639 | } |
| 6640 | } |
| 6641 | |
| 6642 | if (*p == ')') |
| 6643 | { |
| 6644 | p++; |
| 6645 | |
| 6646 | if (*p == ' ') |
| 6647 | /* Perfectly formed definition, no complaints. */ |
| 6648 | macro_define_function (file, line, name, |
| 6649 | argc, (const char **) argv, |
| 6650 | p + 1); |
| 6651 | else if (*p == '\0') |
| 6652 | { |
| 6653 | /* Complain, but do define it. */ |
| 6654 | complain (&dwarf2_macro_malformed_definition, body); |
| 6655 | macro_define_function (file, line, name, |
| 6656 | argc, (const char **) argv, |
| 6657 | p); |
| 6658 | } |
| 6659 | else |
| 6660 | /* Just complain. */ |
| 6661 | complain (&dwarf2_macro_malformed_definition, body); |
| 6662 | } |
| 6663 | else |
| 6664 | /* Just complain. */ |
| 6665 | complain (&dwarf2_macro_malformed_definition, body); |
| 6666 | |
| 6667 | xfree (name); |
| 6668 | { |
| 6669 | int i; |
| 6670 | |
| 6671 | for (i = 0; i < argc; i++) |
| 6672 | xfree (argv[i]); |
| 6673 | } |
| 6674 | xfree (argv); |
| 6675 | } |
| 6676 | else |
| 6677 | complain (&dwarf2_macro_malformed_definition, body); |
| 6678 | } |
| 6679 | |
| 6680 | |
| 6681 | static void |
| 6682 | dwarf_decode_macros (struct line_header *lh, unsigned int offset, |
| 6683 | char *comp_dir, bfd *abfd, |
| 6684 | const struct comp_unit_head *cu_header, |
| 6685 | struct objfile *objfile) |
| 6686 | { |
| 6687 | char *mac_ptr, *mac_end; |
| 6688 | struct macro_source_file *current_file = 0; |
| 6689 | |
| 6690 | if (dwarf_macinfo_buffer == NULL) |
| 6691 | { |
| 6692 | complain (&dwarf2_missing_macinfo_section); |
| 6693 | return; |
| 6694 | } |
| 6695 | |
| 6696 | mac_ptr = dwarf_macinfo_buffer + offset; |
| 6697 | mac_end = dwarf_macinfo_buffer + dwarf_macinfo_size; |
| 6698 | |
| 6699 | for (;;) |
| 6700 | { |
| 6701 | enum dwarf_macinfo_record_type macinfo_type; |
| 6702 | |
| 6703 | /* Do we at least have room for a macinfo type byte? */ |
| 6704 | if (mac_ptr >= mac_end) |
| 6705 | { |
| 6706 | complain (&dwarf2_macros_too_long); |
| 6707 | return; |
| 6708 | } |
| 6709 | |
| 6710 | macinfo_type = read_1_byte (abfd, mac_ptr); |
| 6711 | mac_ptr++; |
| 6712 | |
| 6713 | switch (macinfo_type) |
| 6714 | { |
| 6715 | /* A zero macinfo type indicates the end of the macro |
| 6716 | information. */ |
| 6717 | case 0: |
| 6718 | return; |
| 6719 | |
| 6720 | case DW_MACINFO_define: |
| 6721 | case DW_MACINFO_undef: |
| 6722 | { |
| 6723 | int bytes_read; |
| 6724 | int line; |
| 6725 | char *body; |
| 6726 | |
| 6727 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 6728 | mac_ptr += bytes_read; |
| 6729 | body = read_string (abfd, mac_ptr, &bytes_read); |
| 6730 | mac_ptr += bytes_read; |
| 6731 | |
| 6732 | if (! current_file) |
| 6733 | complain (&dwarf2_macro_outside_file, |
| 6734 | macinfo_type == DW_MACINFO_define ? "definition" : |
| 6735 | macinfo_type == DW_MACINFO_undef ? "undefinition" : |
| 6736 | "something-or-other", |
| 6737 | body); |
| 6738 | else |
| 6739 | { |
| 6740 | if (macinfo_type == DW_MACINFO_define) |
| 6741 | parse_macro_definition (current_file, line, body); |
| 6742 | else if (macinfo_type == DW_MACINFO_undef) |
| 6743 | macro_undef (current_file, line, body); |
| 6744 | } |
| 6745 | } |
| 6746 | break; |
| 6747 | |
| 6748 | case DW_MACINFO_start_file: |
| 6749 | { |
| 6750 | int bytes_read; |
| 6751 | int line, file; |
| 6752 | |
| 6753 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 6754 | mac_ptr += bytes_read; |
| 6755 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 6756 | mac_ptr += bytes_read; |
| 6757 | |
| 6758 | current_file = macro_start_file (file, line, |
| 6759 | current_file, comp_dir, |
| 6760 | lh, objfile); |
| 6761 | } |
| 6762 | break; |
| 6763 | |
| 6764 | case DW_MACINFO_end_file: |
| 6765 | if (! current_file) |
| 6766 | complain (&dwarf2_macro_unmatched_end_file); |
| 6767 | else |
| 6768 | { |
| 6769 | current_file = current_file->included_by; |
| 6770 | if (! current_file) |
| 6771 | { |
| 6772 | enum dwarf_macinfo_record_type next_type; |
| 6773 | |
| 6774 | /* GCC circa March 2002 doesn't produce the zero |
| 6775 | type byte marking the end of the compilation |
| 6776 | unit. Complain if it's not there, but exit no |
| 6777 | matter what. */ |
| 6778 | |
| 6779 | /* Do we at least have room for a macinfo type byte? */ |
| 6780 | if (mac_ptr >= mac_end) |
| 6781 | { |
| 6782 | complain (&dwarf2_macros_too_long); |
| 6783 | return; |
| 6784 | } |
| 6785 | |
| 6786 | /* We don't increment mac_ptr here, so this is just |
| 6787 | a look-ahead. */ |
| 6788 | next_type = read_1_byte (abfd, mac_ptr); |
| 6789 | if (next_type != 0) |
| 6790 | complain (&dwarf2_macros_not_terminated); |
| 6791 | |
| 6792 | return; |
| 6793 | } |
| 6794 | } |
| 6795 | break; |
| 6796 | |
| 6797 | case DW_MACINFO_vendor_ext: |
| 6798 | { |
| 6799 | int bytes_read; |
| 6800 | int constant; |
| 6801 | char *string; |
| 6802 | |
| 6803 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 6804 | mac_ptr += bytes_read; |
| 6805 | string = read_string (abfd, mac_ptr, &bytes_read); |
| 6806 | mac_ptr += bytes_read; |
| 6807 | |
| 6808 | /* We don't recognize any vendor extensions. */ |
| 6809 | } |
| 6810 | break; |
| 6811 | } |
| 6812 | } |
| 6813 | } |