| 1 | /* DWARF 2 debugging format support for GDB. |
| 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 |
| 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 | |
| 41 | #include "language.h" |
| 42 | #include "complaints.h" |
| 43 | #include "bcache.h" |
| 44 | #include <fcntl.h> |
| 45 | #include "gdb_string.h" |
| 46 | #include <sys/types.h> |
| 47 | |
| 48 | #ifndef DWARF2_REG_TO_REGNUM |
| 49 | #define DWARF2_REG_TO_REGNUM(REG) (REG) |
| 50 | #endif |
| 51 | |
| 52 | #if 0 |
| 53 | /* .debug_info header for a compilation unit |
| 54 | Because of alignment constraints, this structure has padding and cannot |
| 55 | be mapped directly onto the beginning of the .debug_info section. */ |
| 56 | typedef struct comp_unit_header |
| 57 | { |
| 58 | unsigned int length; /* length of the .debug_info |
| 59 | contribution */ |
| 60 | unsigned short version; /* version number -- 2 for DWARF |
| 61 | version 2 */ |
| 62 | unsigned int abbrev_offset; /* offset into .debug_abbrev section */ |
| 63 | unsigned char addr_size; /* byte size of an address -- 4 */ |
| 64 | } |
| 65 | _COMP_UNIT_HEADER; |
| 66 | #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11 |
| 67 | #endif |
| 68 | |
| 69 | /* .debug_pubnames header |
| 70 | Because of alignment constraints, this structure has padding and cannot |
| 71 | be mapped directly onto the beginning of the .debug_info section. */ |
| 72 | typedef struct pubnames_header |
| 73 | { |
| 74 | unsigned int length; /* length of the .debug_pubnames |
| 75 | contribution */ |
| 76 | unsigned char version; /* version number -- 2 for DWARF |
| 77 | version 2 */ |
| 78 | unsigned int info_offset; /* offset into .debug_info section */ |
| 79 | unsigned int info_size; /* byte size of .debug_info section |
| 80 | portion */ |
| 81 | } |
| 82 | _PUBNAMES_HEADER; |
| 83 | #define _ACTUAL_PUBNAMES_HEADER_SIZE 13 |
| 84 | |
| 85 | /* .debug_pubnames header |
| 86 | Because of alignment constraints, this structure has padding and cannot |
| 87 | be mapped directly onto the beginning of the .debug_info section. */ |
| 88 | typedef struct aranges_header |
| 89 | { |
| 90 | unsigned int length; /* byte len of the .debug_aranges |
| 91 | contribution */ |
| 92 | unsigned short version; /* version number -- 2 for DWARF |
| 93 | version 2 */ |
| 94 | unsigned int info_offset; /* offset into .debug_info section */ |
| 95 | unsigned char addr_size; /* byte size of an address */ |
| 96 | unsigned char seg_size; /* byte size of segment descriptor */ |
| 97 | } |
| 98 | _ARANGES_HEADER; |
| 99 | #define _ACTUAL_ARANGES_HEADER_SIZE 12 |
| 100 | |
| 101 | /* .debug_line statement program prologue |
| 102 | Because of alignment constraints, this structure has padding and cannot |
| 103 | be mapped directly onto the beginning of the .debug_info section. */ |
| 104 | typedef struct statement_prologue |
| 105 | { |
| 106 | unsigned int total_length; /* byte length of the statement |
| 107 | information */ |
| 108 | unsigned short version; /* version number -- 2 for DWARF |
| 109 | version 2 */ |
| 110 | unsigned int prologue_length; /* # bytes between prologue & |
| 111 | stmt program */ |
| 112 | unsigned char minimum_instruction_length; /* byte size of |
| 113 | smallest instr */ |
| 114 | unsigned char default_is_stmt; /* initial value of is_stmt |
| 115 | register */ |
| 116 | char line_base; |
| 117 | unsigned char line_range; |
| 118 | unsigned char opcode_base; /* number assigned to first special |
| 119 | opcode */ |
| 120 | unsigned char *standard_opcode_lengths; |
| 121 | } |
| 122 | _STATEMENT_PROLOGUE; |
| 123 | |
| 124 | /* offsets and sizes of debugging sections */ |
| 125 | |
| 126 | static file_ptr dwarf_info_offset; |
| 127 | static file_ptr dwarf_abbrev_offset; |
| 128 | static file_ptr dwarf_line_offset; |
| 129 | static file_ptr dwarf_pubnames_offset; |
| 130 | static file_ptr dwarf_aranges_offset; |
| 131 | static file_ptr dwarf_loc_offset; |
| 132 | static file_ptr dwarf_macinfo_offset; |
| 133 | static file_ptr dwarf_str_offset; |
| 134 | |
| 135 | static unsigned int dwarf_info_size; |
| 136 | static unsigned int dwarf_abbrev_size; |
| 137 | static unsigned int dwarf_line_size; |
| 138 | static unsigned int dwarf_pubnames_size; |
| 139 | static unsigned int dwarf_aranges_size; |
| 140 | static unsigned int dwarf_loc_size; |
| 141 | static unsigned int dwarf_macinfo_size; |
| 142 | static unsigned int dwarf_str_size; |
| 143 | |
| 144 | /* names of the debugging sections */ |
| 145 | |
| 146 | #define INFO_SECTION ".debug_info" |
| 147 | #define ABBREV_SECTION ".debug_abbrev" |
| 148 | #define LINE_SECTION ".debug_line" |
| 149 | #define PUBNAMES_SECTION ".debug_pubnames" |
| 150 | #define ARANGES_SECTION ".debug_aranges" |
| 151 | #define LOC_SECTION ".debug_loc" |
| 152 | #define MACINFO_SECTION ".debug_macinfo" |
| 153 | #define STR_SECTION ".debug_str" |
| 154 | |
| 155 | /* local data types */ |
| 156 | |
| 157 | /* The data in a compilation unit header, after target2host |
| 158 | translation, looks like this. */ |
| 159 | struct comp_unit_head |
| 160 | { |
| 161 | unsigned long length; |
| 162 | short version; |
| 163 | unsigned int abbrev_offset; |
| 164 | unsigned char addr_size; |
| 165 | unsigned char signed_addr_p; |
| 166 | unsigned int offset_size; /* size of file offsets; either 4 or 8 */ |
| 167 | unsigned int initial_length_size; /* size of the length field; either |
| 168 | 4 or 12 */ |
| 169 | }; |
| 170 | |
| 171 | /* The data in the .debug_line statement prologue looks like this. */ |
| 172 | struct line_head |
| 173 | { |
| 174 | unsigned int total_length; |
| 175 | unsigned short version; |
| 176 | unsigned int prologue_length; |
| 177 | unsigned char minimum_instruction_length; |
| 178 | unsigned char default_is_stmt; |
| 179 | int line_base; |
| 180 | unsigned char line_range; |
| 181 | unsigned char opcode_base; |
| 182 | unsigned char *standard_opcode_lengths; |
| 183 | }; |
| 184 | |
| 185 | /* When we construct a partial symbol table entry we only |
| 186 | need this much information. */ |
| 187 | struct partial_die_info |
| 188 | { |
| 189 | enum dwarf_tag tag; |
| 190 | unsigned char has_children; |
| 191 | unsigned char is_external; |
| 192 | unsigned char is_declaration; |
| 193 | unsigned char has_type; |
| 194 | unsigned int offset; |
| 195 | unsigned int abbrev; |
| 196 | char *name; |
| 197 | int has_pc_info; |
| 198 | CORE_ADDR lowpc; |
| 199 | CORE_ADDR highpc; |
| 200 | struct dwarf_block *locdesc; |
| 201 | unsigned int language; |
| 202 | char *sibling; |
| 203 | }; |
| 204 | |
| 205 | /* This data structure holds the information of an abbrev. */ |
| 206 | struct abbrev_info |
| 207 | { |
| 208 | unsigned int number; /* number identifying abbrev */ |
| 209 | enum dwarf_tag tag; /* dwarf tag */ |
| 210 | int has_children; /* boolean */ |
| 211 | unsigned int num_attrs; /* number of attributes */ |
| 212 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
| 213 | struct abbrev_info *next; /* next in chain */ |
| 214 | }; |
| 215 | |
| 216 | struct attr_abbrev |
| 217 | { |
| 218 | enum dwarf_attribute name; |
| 219 | enum dwarf_form form; |
| 220 | }; |
| 221 | |
| 222 | /* This data structure holds a complete die structure. */ |
| 223 | struct die_info |
| 224 | { |
| 225 | enum dwarf_tag tag; /* Tag indicating type of die */ |
| 226 | unsigned short has_children; /* Does the die have children */ |
| 227 | unsigned int abbrev; /* Abbrev number */ |
| 228 | unsigned int offset; /* Offset in .debug_info section */ |
| 229 | unsigned int num_attrs; /* Number of attributes */ |
| 230 | struct attribute *attrs; /* An array of attributes */ |
| 231 | struct die_info *next_ref; /* Next die in ref hash table */ |
| 232 | struct die_info *next; /* Next die in linked list */ |
| 233 | struct type *type; /* Cached type information */ |
| 234 | }; |
| 235 | |
| 236 | /* Attributes have a name and a value */ |
| 237 | struct attribute |
| 238 | { |
| 239 | enum dwarf_attribute name; |
| 240 | enum dwarf_form form; |
| 241 | union |
| 242 | { |
| 243 | char *str; |
| 244 | struct dwarf_block *blk; |
| 245 | unsigned long unsnd; |
| 246 | long int snd; |
| 247 | CORE_ADDR addr; |
| 248 | } |
| 249 | u; |
| 250 | }; |
| 251 | |
| 252 | /* Get at parts of an attribute structure */ |
| 253 | |
| 254 | #define DW_STRING(attr) ((attr)->u.str) |
| 255 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
| 256 | #define DW_BLOCK(attr) ((attr)->u.blk) |
| 257 | #define DW_SND(attr) ((attr)->u.snd) |
| 258 | #define DW_ADDR(attr) ((attr)->u.addr) |
| 259 | |
| 260 | /* Blocks are a bunch of untyped bytes. */ |
| 261 | struct dwarf_block |
| 262 | { |
| 263 | unsigned int size; |
| 264 | char *data; |
| 265 | }; |
| 266 | |
| 267 | /* We only hold one compilation unit's abbrevs in |
| 268 | memory at any one time. */ |
| 269 | #ifndef ABBREV_HASH_SIZE |
| 270 | #define ABBREV_HASH_SIZE 121 |
| 271 | #endif |
| 272 | #ifndef ATTR_ALLOC_CHUNK |
| 273 | #define ATTR_ALLOC_CHUNK 4 |
| 274 | #endif |
| 275 | |
| 276 | static struct abbrev_info *dwarf2_abbrevs[ABBREV_HASH_SIZE]; |
| 277 | |
| 278 | /* A hash table of die offsets for following references. */ |
| 279 | #ifndef REF_HASH_SIZE |
| 280 | #define REF_HASH_SIZE 1021 |
| 281 | #endif |
| 282 | |
| 283 | static struct die_info *die_ref_table[REF_HASH_SIZE]; |
| 284 | |
| 285 | /* Obstack for allocating temporary storage used during symbol reading. */ |
| 286 | static struct obstack dwarf2_tmp_obstack; |
| 287 | |
| 288 | /* Offset to the first byte of the current compilation unit header, |
| 289 | for resolving relative reference dies. */ |
| 290 | static unsigned int cu_header_offset; |
| 291 | |
| 292 | /* Allocate fields for structs, unions and enums in this size. */ |
| 293 | #ifndef DW_FIELD_ALLOC_CHUNK |
| 294 | #define DW_FIELD_ALLOC_CHUNK 4 |
| 295 | #endif |
| 296 | |
| 297 | /* The language we are debugging. */ |
| 298 | static enum language cu_language; |
| 299 | static const struct language_defn *cu_language_defn; |
| 300 | |
| 301 | /* Actually data from the sections. */ |
| 302 | static char *dwarf_info_buffer; |
| 303 | static char *dwarf_abbrev_buffer; |
| 304 | static char *dwarf_line_buffer; |
| 305 | |
| 306 | /* A zeroed version of a partial die for initialization purposes. */ |
| 307 | static struct partial_die_info zeroed_partial_die; |
| 308 | |
| 309 | /* The generic symbol table building routines have separate lists for |
| 310 | file scope symbols and all all other scopes (local scopes). So |
| 311 | we need to select the right one to pass to add_symbol_to_list(). |
| 312 | We do it by keeping a pointer to the correct list in list_in_scope. |
| 313 | |
| 314 | FIXME: The original dwarf code just treated the file scope as the first |
| 315 | local scope, and all other local scopes as nested local scopes, and worked |
| 316 | fine. Check to see if we really need to distinguish these |
| 317 | in buildsym.c. */ |
| 318 | static struct pending **list_in_scope = &file_symbols; |
| 319 | |
| 320 | /* FIXME: decode_locdesc sets these variables to describe the location |
| 321 | to the caller. These ought to be a structure or something. If |
| 322 | none of the flags are set, the object lives at the address returned |
| 323 | by decode_locdesc. */ |
| 324 | |
| 325 | static int optimized_out; /* No ops in location in expression, |
| 326 | so object was optimized out. */ |
| 327 | static int isreg; /* Object lives in register. |
| 328 | decode_locdesc's return value is |
| 329 | the register number. */ |
| 330 | static int offreg; /* Object's address is the sum of the |
| 331 | register specified by basereg, plus |
| 332 | the offset returned. */ |
| 333 | static int basereg; /* See `offreg'. */ |
| 334 | static int isderef; /* Value described by flags above is |
| 335 | the address of a pointer to the object. */ |
| 336 | static int islocal; /* Variable is at the returned offset |
| 337 | from the frame start, but there's |
| 338 | no identified frame pointer for |
| 339 | this function, so we can't say |
| 340 | which register it's relative to; |
| 341 | use LOC_LOCAL. */ |
| 342 | |
| 343 | /* DW_AT_frame_base values for the current function. |
| 344 | frame_base_reg is -1 if DW_AT_frame_base is missing, otherwise it |
| 345 | contains the register number for the frame register. |
| 346 | frame_base_offset is the offset from the frame register to the |
| 347 | virtual stack frame. */ |
| 348 | static int frame_base_reg; |
| 349 | static CORE_ADDR frame_base_offset; |
| 350 | |
| 351 | /* This value is added to each symbol value. FIXME: Generalize to |
| 352 | the section_offsets structure used by dbxread (once this is done, |
| 353 | pass the appropriate section number to end_symtab). */ |
| 354 | static CORE_ADDR baseaddr; /* Add to each symbol value */ |
| 355 | |
| 356 | /* We put a pointer to this structure in the read_symtab_private field |
| 357 | of the psymtab. |
| 358 | The complete dwarf information for an objfile is kept in the |
| 359 | psymbol_obstack, so that absolute die references can be handled. |
| 360 | Most of the information in this structure is related to an entire |
| 361 | object file and could be passed via the sym_private field of the objfile. |
| 362 | It is however conceivable that dwarf2 might not be the only type |
| 363 | of symbols read from an object file. */ |
| 364 | |
| 365 | struct dwarf2_pinfo |
| 366 | { |
| 367 | /* Pointer to start of dwarf info buffer for the objfile. */ |
| 368 | |
| 369 | char *dwarf_info_buffer; |
| 370 | |
| 371 | /* Offset in dwarf_info_buffer for this compilation unit. */ |
| 372 | |
| 373 | unsigned long dwarf_info_offset; |
| 374 | |
| 375 | /* Pointer to start of dwarf abbreviation buffer for the objfile. */ |
| 376 | |
| 377 | char *dwarf_abbrev_buffer; |
| 378 | |
| 379 | /* Size of dwarf abbreviation section for the objfile. */ |
| 380 | |
| 381 | unsigned int dwarf_abbrev_size; |
| 382 | |
| 383 | /* Pointer to start of dwarf line buffer for the objfile. */ |
| 384 | |
| 385 | char *dwarf_line_buffer; |
| 386 | }; |
| 387 | |
| 388 | #define PST_PRIVATE(p) ((struct dwarf2_pinfo *)(p)->read_symtab_private) |
| 389 | #define DWARF_INFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_info_buffer) |
| 390 | #define DWARF_INFO_OFFSET(p) (PST_PRIVATE(p)->dwarf_info_offset) |
| 391 | #define DWARF_ABBREV_BUFFER(p) (PST_PRIVATE(p)->dwarf_abbrev_buffer) |
| 392 | #define DWARF_ABBREV_SIZE(p) (PST_PRIVATE(p)->dwarf_abbrev_size) |
| 393 | #define DWARF_LINE_BUFFER(p) (PST_PRIVATE(p)->dwarf_line_buffer) |
| 394 | |
| 395 | /* Maintain an array of referenced fundamental types for the current |
| 396 | compilation unit being read. For DWARF version 1, we have to construct |
| 397 | the fundamental types on the fly, since no information about the |
| 398 | fundamental types is supplied. Each such fundamental type is created by |
| 399 | calling a language dependent routine to create the type, and then a |
| 400 | pointer to that type is then placed in the array at the index specified |
| 401 | by it's FT_<TYPENAME> value. The array has a fixed size set by the |
| 402 | FT_NUM_MEMBERS compile time constant, which is the number of predefined |
| 403 | fundamental types gdb knows how to construct. */ |
| 404 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ |
| 405 | |
| 406 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
| 407 | but this would require a corresponding change in unpack_field_as_long |
| 408 | and friends. */ |
| 409 | static int bits_per_byte = 8; |
| 410 | |
| 411 | /* The routines that read and process dies for a C struct or C++ class |
| 412 | pass lists of data member fields and lists of member function fields |
| 413 | in an instance of a field_info structure, as defined below. */ |
| 414 | struct field_info |
| 415 | { |
| 416 | /* List of data member and baseclasses fields. */ |
| 417 | struct nextfield |
| 418 | { |
| 419 | struct nextfield *next; |
| 420 | int accessibility; |
| 421 | int virtuality; |
| 422 | struct field field; |
| 423 | } |
| 424 | *fields; |
| 425 | |
| 426 | /* Number of fields. */ |
| 427 | int nfields; |
| 428 | |
| 429 | /* Number of baseclasses. */ |
| 430 | int nbaseclasses; |
| 431 | |
| 432 | /* Set if the accesibility of one of the fields is not public. */ |
| 433 | int non_public_fields; |
| 434 | |
| 435 | /* Member function fields array, entries are allocated in the order they |
| 436 | are encountered in the object file. */ |
| 437 | struct nextfnfield |
| 438 | { |
| 439 | struct nextfnfield *next; |
| 440 | struct fn_field fnfield; |
| 441 | } |
| 442 | *fnfields; |
| 443 | |
| 444 | /* Member function fieldlist array, contains name of possibly overloaded |
| 445 | member function, number of overloaded member functions and a pointer |
| 446 | to the head of the member function field chain. */ |
| 447 | struct fnfieldlist |
| 448 | { |
| 449 | char *name; |
| 450 | int length; |
| 451 | struct nextfnfield *head; |
| 452 | } |
| 453 | *fnfieldlists; |
| 454 | |
| 455 | /* Number of entries in the fnfieldlists array. */ |
| 456 | int nfnfields; |
| 457 | }; |
| 458 | |
| 459 | /* FIXME: Kludge to mark a varargs function type for C++ member function |
| 460 | argument processing. */ |
| 461 | #define TYPE_FLAG_VARARGS (1 << 10) |
| 462 | |
| 463 | /* Dwarf2 has no clean way to discern C++ static and non-static member |
| 464 | functions. G++ helps GDB by marking the first parameter for non-static |
| 465 | member functions (which is the this pointer) as artificial. |
| 466 | We pass this information between dwarf2_add_member_fn and |
| 467 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ |
| 468 | #define TYPE_FIELD_ARTIFICIAL TYPE_FIELD_BITPOS |
| 469 | |
| 470 | /* Various complaints about symbol reading that don't abort the process */ |
| 471 | |
| 472 | static struct complaint dwarf2_const_ignored = |
| 473 | { |
| 474 | "type qualifier 'const' ignored", 0, 0 |
| 475 | }; |
| 476 | static struct complaint dwarf2_volatile_ignored = |
| 477 | { |
| 478 | "type qualifier 'volatile' ignored", 0, 0 |
| 479 | }; |
| 480 | static struct complaint dwarf2_non_const_array_bound_ignored = |
| 481 | { |
| 482 | "non-constant array bounds form '%s' ignored", 0, 0 |
| 483 | }; |
| 484 | static struct complaint dwarf2_missing_line_number_section = |
| 485 | { |
| 486 | "missing .debug_line section", 0, 0 |
| 487 | }; |
| 488 | static struct complaint dwarf2_mangled_line_number_section = |
| 489 | { |
| 490 | "mangled .debug_line section", 0, 0 |
| 491 | }; |
| 492 | static struct complaint dwarf2_unsupported_die_ref_attr = |
| 493 | { |
| 494 | "unsupported die ref attribute form: '%s'", 0, 0 |
| 495 | }; |
| 496 | static struct complaint dwarf2_unsupported_stack_op = |
| 497 | { |
| 498 | "unsupported stack op: '%s'", 0, 0 |
| 499 | }; |
| 500 | static struct complaint dwarf2_complex_location_expr = |
| 501 | { |
| 502 | "location expression too complex", 0, 0 |
| 503 | }; |
| 504 | static struct complaint dwarf2_unsupported_tag = |
| 505 | { |
| 506 | "unsupported tag: '%s'", 0, 0 |
| 507 | }; |
| 508 | static struct complaint dwarf2_unsupported_at_encoding = |
| 509 | { |
| 510 | "unsupported DW_AT_encoding: '%s'", 0, 0 |
| 511 | }; |
| 512 | static struct complaint dwarf2_unsupported_at_frame_base = |
| 513 | { |
| 514 | "unsupported DW_AT_frame_base for function '%s'", 0, 0 |
| 515 | }; |
| 516 | static struct complaint dwarf2_unexpected_tag = |
| 517 | { |
| 518 | "unexepected tag in read_type_die: '%s'", 0, 0 |
| 519 | }; |
| 520 | static struct complaint dwarf2_missing_at_frame_base = |
| 521 | { |
| 522 | "DW_AT_frame_base missing for DW_OP_fbreg", 0, 0 |
| 523 | }; |
| 524 | static struct complaint dwarf2_bad_static_member_name = |
| 525 | { |
| 526 | "unrecognized static data member name '%s'", 0, 0 |
| 527 | }; |
| 528 | static struct complaint dwarf2_unsupported_accessibility = |
| 529 | { |
| 530 | "unsupported accessibility %d", 0, 0 |
| 531 | }; |
| 532 | static struct complaint dwarf2_bad_member_name_complaint = |
| 533 | { |
| 534 | "cannot extract member name from '%s'", 0, 0 |
| 535 | }; |
| 536 | static struct complaint dwarf2_missing_member_fn_type_complaint = |
| 537 | { |
| 538 | "member function type missing for '%s'", 0, 0 |
| 539 | }; |
| 540 | static struct complaint dwarf2_vtbl_not_found_complaint = |
| 541 | { |
| 542 | "virtual function table pointer not found when defining class '%s'", 0, 0 |
| 543 | }; |
| 544 | static struct complaint dwarf2_absolute_sibling_complaint = |
| 545 | { |
| 546 | "ignoring absolute DW_AT_sibling", 0, 0 |
| 547 | }; |
| 548 | static struct complaint dwarf2_const_value_length_mismatch = |
| 549 | { |
| 550 | "const value length mismatch for '%s', got %d, expected %d", 0, 0 |
| 551 | }; |
| 552 | static struct complaint dwarf2_unsupported_const_value_attr = |
| 553 | { |
| 554 | "unsupported const value attribute form: '%s'", 0, 0 |
| 555 | }; |
| 556 | |
| 557 | /* Externals references. */ |
| 558 | extern int info_verbose; /* From main.c; nonzero => verbose */ |
| 559 | |
| 560 | /* local function prototypes */ |
| 561 | |
| 562 | static void dwarf2_locate_sections (bfd *, asection *, PTR); |
| 563 | |
| 564 | #if 0 |
| 565 | static void dwarf2_build_psymtabs_easy (struct objfile *, int); |
| 566 | #endif |
| 567 | |
| 568 | static void dwarf2_build_psymtabs_hard (struct objfile *, int); |
| 569 | |
| 570 | static char *scan_partial_symbols (char *, struct objfile *, |
| 571 | CORE_ADDR *, CORE_ADDR *, |
| 572 | const struct comp_unit_head *); |
| 573 | |
| 574 | static void add_partial_symbol (struct partial_die_info *, struct objfile *, |
| 575 | const struct comp_unit_head *); |
| 576 | |
| 577 | static void dwarf2_psymtab_to_symtab (struct partial_symtab *); |
| 578 | |
| 579 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
| 580 | |
| 581 | static char *dwarf2_read_section (struct objfile *, file_ptr, unsigned int); |
| 582 | |
| 583 | static void dwarf2_read_abbrevs (bfd *, unsigned int); |
| 584 | |
| 585 | static void dwarf2_empty_abbrev_table (PTR); |
| 586 | |
| 587 | static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int); |
| 588 | |
| 589 | static char *read_partial_die (struct partial_die_info *, |
| 590 | bfd *, char *, |
| 591 | const struct comp_unit_head *); |
| 592 | |
| 593 | static char *read_full_die (struct die_info **, bfd *, char *, |
| 594 | const struct comp_unit_head *); |
| 595 | |
| 596 | static char *read_attribute (struct attribute *, struct attr_abbrev *, |
| 597 | bfd *, char *, const struct comp_unit_head *); |
| 598 | |
| 599 | static unsigned int read_1_byte (bfd *, char *); |
| 600 | |
| 601 | static int read_1_signed_byte (bfd *, char *); |
| 602 | |
| 603 | static unsigned int read_2_bytes (bfd *, char *); |
| 604 | |
| 605 | static unsigned int read_4_bytes (bfd *, char *); |
| 606 | |
| 607 | static unsigned long read_8_bytes (bfd *, char *); |
| 608 | |
| 609 | static CORE_ADDR read_address (bfd *, char *ptr, const struct comp_unit_head *, |
| 610 | int *bytes_read); |
| 611 | |
| 612 | static LONGEST read_initial_length (bfd *, char *, |
| 613 | struct comp_unit_head *, int *bytes_read); |
| 614 | |
| 615 | static LONGEST read_offset (bfd *, char *, const struct comp_unit_head *, |
| 616 | int *bytes_read); |
| 617 | |
| 618 | static char *read_n_bytes (bfd *, char *, unsigned int); |
| 619 | |
| 620 | static char *read_string (bfd *, char *, unsigned int *); |
| 621 | |
| 622 | static unsigned long read_unsigned_leb128 (bfd *, char *, unsigned int *); |
| 623 | |
| 624 | static long read_signed_leb128 (bfd *, char *, unsigned int *); |
| 625 | |
| 626 | static void set_cu_language (unsigned int); |
| 627 | |
| 628 | static struct attribute *dwarf_attr (struct die_info *, unsigned int); |
| 629 | |
| 630 | static int die_is_declaration (struct die_info *); |
| 631 | |
| 632 | static void dwarf_decode_lines (unsigned int, char *, bfd *, |
| 633 | const struct comp_unit_head *); |
| 634 | |
| 635 | static void dwarf2_start_subfile (char *, char *); |
| 636 | |
| 637 | static struct symbol *new_symbol (struct die_info *, struct type *, |
| 638 | struct objfile *, const struct comp_unit_head *); |
| 639 | |
| 640 | static void dwarf2_const_value (struct attribute *, struct symbol *, |
| 641 | struct objfile *, const struct comp_unit_head *); |
| 642 | |
| 643 | static void dwarf2_const_value_data (struct attribute *attr, |
| 644 | struct symbol *sym, |
| 645 | int bits); |
| 646 | |
| 647 | static struct type *die_type (struct die_info *, struct objfile *, |
| 648 | const struct comp_unit_head *); |
| 649 | |
| 650 | static struct type *die_containing_type (struct die_info *, struct objfile *, |
| 651 | const struct comp_unit_head *); |
| 652 | |
| 653 | #if 0 |
| 654 | static struct type *type_at_offset (unsigned int, struct objfile *); |
| 655 | #endif |
| 656 | |
| 657 | static struct type *tag_type_to_type (struct die_info *, struct objfile *, |
| 658 | const struct comp_unit_head *); |
| 659 | |
| 660 | static void read_type_die (struct die_info *, struct objfile *, |
| 661 | const struct comp_unit_head *); |
| 662 | |
| 663 | static void read_typedef (struct die_info *, struct objfile *, |
| 664 | const struct comp_unit_head *); |
| 665 | |
| 666 | static void read_base_type (struct die_info *, struct objfile *); |
| 667 | |
| 668 | static void read_file_scope (struct die_info *, struct objfile *, |
| 669 | const struct comp_unit_head *); |
| 670 | |
| 671 | static void read_func_scope (struct die_info *, struct objfile *, |
| 672 | const struct comp_unit_head *); |
| 673 | |
| 674 | static void read_lexical_block_scope (struct die_info *, struct objfile *, |
| 675 | const struct comp_unit_head *); |
| 676 | |
| 677 | static int dwarf2_get_pc_bounds (struct die_info *, |
| 678 | CORE_ADDR *, CORE_ADDR *, struct objfile *); |
| 679 | |
| 680 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
| 681 | struct objfile *, const struct comp_unit_head *); |
| 682 | |
| 683 | static void dwarf2_attach_fields_to_type (struct field_info *, |
| 684 | struct type *, struct objfile *); |
| 685 | |
| 686 | static void dwarf2_add_member_fn (struct field_info *, |
| 687 | struct die_info *, struct type *, |
| 688 | struct objfile *objfile, |
| 689 | const struct comp_unit_head *); |
| 690 | |
| 691 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
| 692 | struct type *, struct objfile *); |
| 693 | |
| 694 | static void read_structure_scope (struct die_info *, struct objfile *, |
| 695 | const struct comp_unit_head *); |
| 696 | |
| 697 | static void read_common_block (struct die_info *, struct objfile *, |
| 698 | const struct comp_unit_head *); |
| 699 | |
| 700 | static void read_enumeration (struct die_info *, struct objfile *, |
| 701 | const struct comp_unit_head *); |
| 702 | |
| 703 | static struct type *dwarf_base_type (int, int, struct objfile *); |
| 704 | |
| 705 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct objfile *, |
| 706 | const struct comp_unit_head *); |
| 707 | |
| 708 | static void read_array_type (struct die_info *, struct objfile *, |
| 709 | const struct comp_unit_head *); |
| 710 | |
| 711 | static void read_tag_pointer_type (struct die_info *, struct objfile *, |
| 712 | const struct comp_unit_head *); |
| 713 | |
| 714 | static void read_tag_ptr_to_member_type (struct die_info *, struct objfile *, |
| 715 | const struct comp_unit_head *); |
| 716 | |
| 717 | static void read_tag_reference_type (struct die_info *, struct objfile *, |
| 718 | const struct comp_unit_head *); |
| 719 | |
| 720 | static void read_tag_const_type (struct die_info *, struct objfile *, |
| 721 | const struct comp_unit_head *); |
| 722 | |
| 723 | static void read_tag_volatile_type (struct die_info *, struct objfile *, |
| 724 | const struct comp_unit_head *); |
| 725 | |
| 726 | static void read_tag_string_type (struct die_info *, struct objfile *); |
| 727 | |
| 728 | static void read_subroutine_type (struct die_info *, struct objfile *, |
| 729 | const struct comp_unit_head *); |
| 730 | |
| 731 | static struct die_info *read_comp_unit (char *, bfd *, |
| 732 | const struct comp_unit_head *); |
| 733 | |
| 734 | static void free_die_list (struct die_info *); |
| 735 | |
| 736 | static struct cleanup *make_cleanup_free_die_list (struct die_info *); |
| 737 | |
| 738 | static void process_die (struct die_info *, struct objfile *, |
| 739 | const struct comp_unit_head *); |
| 740 | |
| 741 | static char *dwarf2_linkage_name (struct die_info *); |
| 742 | |
| 743 | static char *dwarf_tag_name (unsigned int); |
| 744 | |
| 745 | static char *dwarf_attr_name (unsigned int); |
| 746 | |
| 747 | static char *dwarf_form_name (unsigned int); |
| 748 | |
| 749 | static char *dwarf_stack_op_name (unsigned int); |
| 750 | |
| 751 | static char *dwarf_bool_name (unsigned int); |
| 752 | |
| 753 | static char *dwarf_type_encoding_name (unsigned int); |
| 754 | |
| 755 | #if 0 |
| 756 | static char *dwarf_cfi_name (unsigned int); |
| 757 | |
| 758 | struct die_info *copy_die (struct die_info *); |
| 759 | #endif |
| 760 | |
| 761 | static struct die_info *sibling_die (struct die_info *); |
| 762 | |
| 763 | static void dump_die (struct die_info *); |
| 764 | |
| 765 | static void dump_die_list (struct die_info *); |
| 766 | |
| 767 | static void store_in_ref_table (unsigned int, struct die_info *); |
| 768 | |
| 769 | static void dwarf2_empty_hash_tables (void); |
| 770 | |
| 771 | static unsigned int dwarf2_get_ref_die_offset (struct attribute *); |
| 772 | |
| 773 | static struct die_info *follow_die_ref (unsigned int); |
| 774 | |
| 775 | static struct type *dwarf2_fundamental_type (struct objfile *, int); |
| 776 | |
| 777 | /* memory allocation interface */ |
| 778 | |
| 779 | static void dwarf2_free_tmp_obstack (PTR); |
| 780 | |
| 781 | static struct dwarf_block *dwarf_alloc_block (void); |
| 782 | |
| 783 | static struct abbrev_info *dwarf_alloc_abbrev (void); |
| 784 | |
| 785 | static struct die_info *dwarf_alloc_die (void); |
| 786 | |
| 787 | /* Try to locate the sections we need for DWARF 2 debugging |
| 788 | information and return true if we have enough to do something. */ |
| 789 | |
| 790 | int |
| 791 | dwarf2_has_info (bfd *abfd) |
| 792 | { |
| 793 | dwarf_info_offset = dwarf_abbrev_offset = dwarf_line_offset = 0; |
| 794 | bfd_map_over_sections (abfd, dwarf2_locate_sections, NULL); |
| 795 | if (dwarf_info_offset && dwarf_abbrev_offset) |
| 796 | { |
| 797 | return 1; |
| 798 | } |
| 799 | else |
| 800 | { |
| 801 | return 0; |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | /* This function is mapped across the sections and remembers the |
| 806 | offset and size of each of the debugging sections we are interested |
| 807 | in. */ |
| 808 | |
| 809 | static void |
| 810 | dwarf2_locate_sections (bfd *ignore_abfd, asection *sectp, PTR ignore_ptr) |
| 811 | { |
| 812 | if (STREQ (sectp->name, INFO_SECTION)) |
| 813 | { |
| 814 | dwarf_info_offset = sectp->filepos; |
| 815 | dwarf_info_size = bfd_get_section_size_before_reloc (sectp); |
| 816 | } |
| 817 | else if (STREQ (sectp->name, ABBREV_SECTION)) |
| 818 | { |
| 819 | dwarf_abbrev_offset = sectp->filepos; |
| 820 | dwarf_abbrev_size = bfd_get_section_size_before_reloc (sectp); |
| 821 | } |
| 822 | else if (STREQ (sectp->name, LINE_SECTION)) |
| 823 | { |
| 824 | dwarf_line_offset = sectp->filepos; |
| 825 | dwarf_line_size = bfd_get_section_size_before_reloc (sectp); |
| 826 | } |
| 827 | else if (STREQ (sectp->name, PUBNAMES_SECTION)) |
| 828 | { |
| 829 | dwarf_pubnames_offset = sectp->filepos; |
| 830 | dwarf_pubnames_size = bfd_get_section_size_before_reloc (sectp); |
| 831 | } |
| 832 | else if (STREQ (sectp->name, ARANGES_SECTION)) |
| 833 | { |
| 834 | dwarf_aranges_offset = sectp->filepos; |
| 835 | dwarf_aranges_size = bfd_get_section_size_before_reloc (sectp); |
| 836 | } |
| 837 | else if (STREQ (sectp->name, LOC_SECTION)) |
| 838 | { |
| 839 | dwarf_loc_offset = sectp->filepos; |
| 840 | dwarf_loc_size = bfd_get_section_size_before_reloc (sectp); |
| 841 | } |
| 842 | else if (STREQ (sectp->name, MACINFO_SECTION)) |
| 843 | { |
| 844 | dwarf_macinfo_offset = sectp->filepos; |
| 845 | dwarf_macinfo_size = bfd_get_section_size_before_reloc (sectp); |
| 846 | } |
| 847 | else if (STREQ (sectp->name, STR_SECTION)) |
| 848 | { |
| 849 | dwarf_str_offset = sectp->filepos; |
| 850 | dwarf_str_size = bfd_get_section_size_before_reloc (sectp); |
| 851 | } |
| 852 | } |
| 853 | |
| 854 | /* Build a partial symbol table. */ |
| 855 | |
| 856 | void |
| 857 | dwarf2_build_psymtabs (struct objfile *objfile, int mainline) |
| 858 | { |
| 859 | |
| 860 | /* We definitely need the .debug_info and .debug_abbrev sections */ |
| 861 | |
| 862 | dwarf_info_buffer = dwarf2_read_section (objfile, |
| 863 | dwarf_info_offset, |
| 864 | dwarf_info_size); |
| 865 | dwarf_abbrev_buffer = dwarf2_read_section (objfile, |
| 866 | dwarf_abbrev_offset, |
| 867 | dwarf_abbrev_size); |
| 868 | dwarf_line_buffer = dwarf2_read_section (objfile, |
| 869 | dwarf_line_offset, |
| 870 | dwarf_line_size); |
| 871 | |
| 872 | if (mainline |
| 873 | || (objfile->global_psymbols.size == 0 |
| 874 | && objfile->static_psymbols.size == 0)) |
| 875 | { |
| 876 | init_psymbol_list (objfile, 1024); |
| 877 | } |
| 878 | |
| 879 | #if 0 |
| 880 | if (dwarf_aranges_offset && dwarf_pubnames_offset) |
| 881 | { |
| 882 | /* Things are significantly easier if we have .debug_aranges and |
| 883 | .debug_pubnames sections */ |
| 884 | |
| 885 | dwarf2_build_psymtabs_easy (objfile, mainline); |
| 886 | } |
| 887 | else |
| 888 | #endif |
| 889 | /* only test this case for now */ |
| 890 | { |
| 891 | /* In this case we have to work a bit harder */ |
| 892 | dwarf2_build_psymtabs_hard (objfile, mainline); |
| 893 | } |
| 894 | } |
| 895 | |
| 896 | #if 0 |
| 897 | /* Build the partial symbol table from the information in the |
| 898 | .debug_pubnames and .debug_aranges sections. */ |
| 899 | |
| 900 | static void |
| 901 | dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline) |
| 902 | { |
| 903 | bfd *abfd = objfile->obfd; |
| 904 | char *aranges_buffer, *pubnames_buffer; |
| 905 | char *aranges_ptr, *pubnames_ptr; |
| 906 | unsigned int entry_length, version, info_offset, info_size; |
| 907 | |
| 908 | pubnames_buffer = dwarf2_read_section (objfile, |
| 909 | dwarf_pubnames_offset, |
| 910 | dwarf_pubnames_size); |
| 911 | pubnames_ptr = pubnames_buffer; |
| 912 | while ((pubnames_ptr - pubnames_buffer) < dwarf_pubnames_size) |
| 913 | { |
| 914 | struct comp_unit_head cu_header; |
| 915 | int bytes_read; |
| 916 | |
| 917 | entry_length = read_initial_length (abfd, pubnames_ptr, &cu_header, |
| 918 | &bytes_read); |
| 919 | pubnames_ptr += bytes_read; |
| 920 | version = read_1_byte (abfd, pubnames_ptr); |
| 921 | pubnames_ptr += 1; |
| 922 | info_offset = read_4_bytes (abfd, pubnames_ptr); |
| 923 | pubnames_ptr += 4; |
| 924 | info_size = read_4_bytes (abfd, pubnames_ptr); |
| 925 | pubnames_ptr += 4; |
| 926 | } |
| 927 | |
| 928 | aranges_buffer = dwarf2_read_section (objfile, |
| 929 | dwarf_aranges_offset, |
| 930 | dwarf_aranges_size); |
| 931 | |
| 932 | } |
| 933 | #endif |
| 934 | |
| 935 | /* Read in the comp unit header information from the debug_info at |
| 936 | info_ptr. */ |
| 937 | |
| 938 | static char * |
| 939 | read_comp_unit_head (struct comp_unit_head *cu_header, |
| 940 | char *info_ptr, bfd *abfd) |
| 941 | { |
| 942 | int signed_addr; |
| 943 | int bytes_read; |
| 944 | cu_header->length = read_initial_length (abfd, info_ptr, cu_header, |
| 945 | &bytes_read); |
| 946 | info_ptr += bytes_read; |
| 947 | cu_header->version = read_2_bytes (abfd, info_ptr); |
| 948 | info_ptr += 2; |
| 949 | cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header, |
| 950 | &bytes_read); |
| 951 | info_ptr += bytes_read; |
| 952 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
| 953 | info_ptr += 1; |
| 954 | signed_addr = bfd_get_sign_extend_vma (abfd); |
| 955 | if (signed_addr < 0) |
| 956 | internal_error (__FILE__, __LINE__, |
| 957 | "read_comp_unit_head: dwarf from non elf file"); |
| 958 | cu_header->signed_addr_p = signed_addr; |
| 959 | return info_ptr; |
| 960 | } |
| 961 | |
| 962 | /* Build the partial symbol table by doing a quick pass through the |
| 963 | .debug_info and .debug_abbrev sections. */ |
| 964 | |
| 965 | static void |
| 966 | dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline) |
| 967 | { |
| 968 | /* Instead of reading this into a big buffer, we should probably use |
| 969 | mmap() on architectures that support it. (FIXME) */ |
| 970 | bfd *abfd = objfile->obfd; |
| 971 | char *info_ptr, *abbrev_ptr; |
| 972 | char *beg_of_comp_unit; |
| 973 | struct partial_die_info comp_unit_die; |
| 974 | struct partial_symtab *pst; |
| 975 | struct cleanup *back_to; |
| 976 | CORE_ADDR lowpc, highpc; |
| 977 | |
| 978 | info_ptr = dwarf_info_buffer; |
| 979 | abbrev_ptr = dwarf_abbrev_buffer; |
| 980 | |
| 981 | /* We use dwarf2_tmp_obstack for objects that don't need to survive |
| 982 | the partial symbol scan, like attribute values. |
| 983 | |
| 984 | We could reduce our peak memory consumption during partial symbol |
| 985 | table construction by freeing stuff from this obstack more often |
| 986 | --- say, after processing each compilation unit, or each die --- |
| 987 | but it turns out that this saves almost nothing. For an |
| 988 | executable with 11Mb of Dwarf 2 data, I found about 64k allocated |
| 989 | on dwarf2_tmp_obstack. Some investigation showed: |
| 990 | |
| 991 | 1) 69% of the attributes used forms DW_FORM_addr, DW_FORM_data*, |
| 992 | DW_FORM_flag, DW_FORM_[su]data, and DW_FORM_ref*. These are |
| 993 | all fixed-length values not requiring dynamic allocation. |
| 994 | |
| 995 | 2) 30% of the attributes used the form DW_FORM_string. For |
| 996 | DW_FORM_string, read_attribute simply hands back a pointer to |
| 997 | the null-terminated string in dwarf_info_buffer, so no dynamic |
| 998 | allocation is needed there either. |
| 999 | |
| 1000 | 3) The remaining 1% of the attributes all used DW_FORM_block1. |
| 1001 | 75% of those were DW_AT_frame_base location lists for |
| 1002 | functions; the rest were DW_AT_location attributes, probably |
| 1003 | for the global variables. |
| 1004 | |
| 1005 | Anyway, what this all means is that the memory the dwarf2 |
| 1006 | reader uses as temporary space reading partial symbols is about |
| 1007 | 0.5% as much as we use for dwarf_*_buffer. That's noise. */ |
| 1008 | |
| 1009 | obstack_init (&dwarf2_tmp_obstack); |
| 1010 | back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL); |
| 1011 | |
| 1012 | /* Since the objects we're extracting from dwarf_info_buffer vary in |
| 1013 | length, only the individual functions to extract them (like |
| 1014 | read_comp_unit_head and read_partial_die) can really know whether |
| 1015 | the buffer is large enough to hold another complete object. |
| 1016 | |
| 1017 | At the moment, they don't actually check that. If |
| 1018 | dwarf_info_buffer holds just one extra byte after the last |
| 1019 | compilation unit's dies, then read_comp_unit_head will happily |
| 1020 | read off the end of the buffer. read_partial_die is similarly |
| 1021 | casual. Those functions should be fixed. |
| 1022 | |
| 1023 | For this loop condition, simply checking whether there's any data |
| 1024 | left at all should be sufficient. */ |
| 1025 | while (info_ptr < dwarf_info_buffer + dwarf_info_size) |
| 1026 | { |
| 1027 | struct comp_unit_head cu_header; |
| 1028 | beg_of_comp_unit = info_ptr; |
| 1029 | info_ptr = read_comp_unit_head (&cu_header, info_ptr, abfd); |
| 1030 | |
| 1031 | if (cu_header.version != 2) |
| 1032 | { |
| 1033 | error ("Dwarf Error: wrong version in compilation unit header."); |
| 1034 | return; |
| 1035 | } |
| 1036 | if (cu_header.abbrev_offset >= dwarf_abbrev_size) |
| 1037 | { |
| 1038 | error ("Dwarf Error: bad offset (0x%lx) in compilation unit header (offset 0x%lx + 6).", |
| 1039 | (long) cu_header.abbrev_offset, |
| 1040 | (long) (beg_of_comp_unit - dwarf_info_buffer)); |
| 1041 | return; |
| 1042 | } |
| 1043 | if (beg_of_comp_unit + cu_header.length + cu_header.initial_length_size |
| 1044 | > dwarf_info_buffer + dwarf_info_size) |
| 1045 | { |
| 1046 | error ("Dwarf Error: bad length (0x%lx) in compilation unit header (offset 0x%lx + 0).", |
| 1047 | (long) cu_header.length, |
| 1048 | (long) (beg_of_comp_unit - dwarf_info_buffer)); |
| 1049 | return; |
| 1050 | } |
| 1051 | /* Read the abbrevs for this compilation unit into a table */ |
| 1052 | dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset); |
| 1053 | make_cleanup (dwarf2_empty_abbrev_table, NULL); |
| 1054 | |
| 1055 | /* Read the compilation unit die */ |
| 1056 | info_ptr = read_partial_die (&comp_unit_die, abfd, info_ptr, |
| 1057 | &cu_header); |
| 1058 | |
| 1059 | /* Set the language we're debugging */ |
| 1060 | set_cu_language (comp_unit_die.language); |
| 1061 | |
| 1062 | /* Allocate a new partial symbol table structure */ |
| 1063 | pst = start_psymtab_common (objfile, objfile->section_offsets, |
| 1064 | comp_unit_die.name ? comp_unit_die.name : "", |
| 1065 | comp_unit_die.lowpc, |
| 1066 | objfile->global_psymbols.next, |
| 1067 | objfile->static_psymbols.next); |
| 1068 | |
| 1069 | pst->read_symtab_private = (char *) |
| 1070 | obstack_alloc (&objfile->psymbol_obstack, sizeof (struct dwarf2_pinfo)); |
| 1071 | cu_header_offset = beg_of_comp_unit - dwarf_info_buffer; |
| 1072 | DWARF_INFO_BUFFER (pst) = dwarf_info_buffer; |
| 1073 | DWARF_INFO_OFFSET (pst) = beg_of_comp_unit - dwarf_info_buffer; |
| 1074 | DWARF_ABBREV_BUFFER (pst) = dwarf_abbrev_buffer; |
| 1075 | DWARF_ABBREV_SIZE (pst) = dwarf_abbrev_size; |
| 1076 | DWARF_LINE_BUFFER (pst) = dwarf_line_buffer; |
| 1077 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 1078 | |
| 1079 | /* Store the function that reads in the rest of the symbol table */ |
| 1080 | pst->read_symtab = dwarf2_psymtab_to_symtab; |
| 1081 | |
| 1082 | /* Check if comp unit has_children. |
| 1083 | If so, read the rest of the partial symbols from this comp unit. |
| 1084 | If not, there's no more debug_info for this comp unit. */ |
| 1085 | if (comp_unit_die.has_children) |
| 1086 | { |
| 1087 | info_ptr = scan_partial_symbols (info_ptr, objfile, &lowpc, &highpc, |
| 1088 | &cu_header); |
| 1089 | |
| 1090 | /* If the compilation unit didn't have an explicit address range, |
| 1091 | then use the information extracted from its child dies. */ |
| 1092 | if (! comp_unit_die.has_pc_info) |
| 1093 | { |
| 1094 | comp_unit_die.lowpc = lowpc; |
| 1095 | comp_unit_die.highpc = highpc; |
| 1096 | } |
| 1097 | } |
| 1098 | pst->textlow = comp_unit_die.lowpc + baseaddr; |
| 1099 | pst->texthigh = comp_unit_die.highpc + baseaddr; |
| 1100 | |
| 1101 | pst->n_global_syms = objfile->global_psymbols.next - |
| 1102 | (objfile->global_psymbols.list + pst->globals_offset); |
| 1103 | pst->n_static_syms = objfile->static_psymbols.next - |
| 1104 | (objfile->static_psymbols.list + pst->statics_offset); |
| 1105 | sort_pst_symbols (pst); |
| 1106 | |
| 1107 | /* If there is already a psymtab or symtab for a file of this |
| 1108 | name, remove it. (If there is a symtab, more drastic things |
| 1109 | also happen.) This happens in VxWorks. */ |
| 1110 | free_named_symtabs (pst->filename); |
| 1111 | |
| 1112 | info_ptr = beg_of_comp_unit + cu_header.length |
| 1113 | + cu_header.initial_length_size; |
| 1114 | } |
| 1115 | do_cleanups (back_to); |
| 1116 | } |
| 1117 | |
| 1118 | /* Read in all interesting dies to the end of the compilation unit. */ |
| 1119 | |
| 1120 | static char * |
| 1121 | scan_partial_symbols (char *info_ptr, struct objfile *objfile, |
| 1122 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 1123 | const struct comp_unit_head *cu_header) |
| 1124 | { |
| 1125 | bfd *abfd = objfile->obfd; |
| 1126 | struct partial_die_info pdi; |
| 1127 | |
| 1128 | /* This function is called after we've read in the comp_unit_die in |
| 1129 | order to read its children. We start the nesting level at 1 since |
| 1130 | we have pushed 1 level down in order to read the comp unit's children. |
| 1131 | The comp unit itself is at level 0, so we stop reading when we pop |
| 1132 | back to that level. */ |
| 1133 | |
| 1134 | int nesting_level = 1; |
| 1135 | |
| 1136 | *lowpc = ((CORE_ADDR) -1); |
| 1137 | *highpc = ((CORE_ADDR) 0); |
| 1138 | |
| 1139 | while (nesting_level) |
| 1140 | { |
| 1141 | info_ptr = read_partial_die (&pdi, abfd, info_ptr, cu_header); |
| 1142 | |
| 1143 | if (pdi.name) |
| 1144 | { |
| 1145 | switch (pdi.tag) |
| 1146 | { |
| 1147 | case DW_TAG_subprogram: |
| 1148 | if (pdi.has_pc_info) |
| 1149 | { |
| 1150 | if (pdi.lowpc < *lowpc) |
| 1151 | { |
| 1152 | *lowpc = pdi.lowpc; |
| 1153 | } |
| 1154 | if (pdi.highpc > *highpc) |
| 1155 | { |
| 1156 | *highpc = pdi.highpc; |
| 1157 | } |
| 1158 | if ((pdi.is_external || nesting_level == 1) |
| 1159 | && !pdi.is_declaration) |
| 1160 | { |
| 1161 | add_partial_symbol (&pdi, objfile, cu_header); |
| 1162 | } |
| 1163 | } |
| 1164 | break; |
| 1165 | case DW_TAG_variable: |
| 1166 | case DW_TAG_typedef: |
| 1167 | case DW_TAG_class_type: |
| 1168 | case DW_TAG_structure_type: |
| 1169 | case DW_TAG_union_type: |
| 1170 | case DW_TAG_enumeration_type: |
| 1171 | if ((pdi.is_external || nesting_level == 1) |
| 1172 | && !pdi.is_declaration) |
| 1173 | { |
| 1174 | add_partial_symbol (&pdi, objfile, cu_header); |
| 1175 | } |
| 1176 | break; |
| 1177 | case DW_TAG_enumerator: |
| 1178 | /* File scope enumerators are added to the partial symbol |
| 1179 | table. */ |
| 1180 | if (nesting_level == 2) |
| 1181 | add_partial_symbol (&pdi, objfile, cu_header); |
| 1182 | break; |
| 1183 | case DW_TAG_base_type: |
| 1184 | /* File scope base type definitions are added to the partial |
| 1185 | symbol table. */ |
| 1186 | if (nesting_level == 1) |
| 1187 | add_partial_symbol (&pdi, objfile, cu_header); |
| 1188 | break; |
| 1189 | default: |
| 1190 | break; |
| 1191 | } |
| 1192 | } |
| 1193 | |
| 1194 | /* If the die has a sibling, skip to the sibling. |
| 1195 | Do not skip enumeration types, we want to record their |
| 1196 | enumerators. */ |
| 1197 | if (pdi.sibling && pdi.tag != DW_TAG_enumeration_type) |
| 1198 | { |
| 1199 | info_ptr = pdi.sibling; |
| 1200 | } |
| 1201 | else if (pdi.has_children) |
| 1202 | { |
| 1203 | /* Die has children, but the optional DW_AT_sibling attribute |
| 1204 | is missing. */ |
| 1205 | nesting_level++; |
| 1206 | } |
| 1207 | |
| 1208 | if (pdi.tag == 0) |
| 1209 | { |
| 1210 | nesting_level--; |
| 1211 | } |
| 1212 | } |
| 1213 | |
| 1214 | /* If we didn't find a lowpc, set it to highpc to avoid complaints |
| 1215 | from `maint check'. */ |
| 1216 | if (*lowpc == ((CORE_ADDR) -1)) |
| 1217 | *lowpc = *highpc; |
| 1218 | return info_ptr; |
| 1219 | } |
| 1220 | |
| 1221 | static void |
| 1222 | add_partial_symbol (struct partial_die_info *pdi, struct objfile *objfile, |
| 1223 | const struct comp_unit_head *cu_header) |
| 1224 | { |
| 1225 | CORE_ADDR addr = 0; |
| 1226 | |
| 1227 | switch (pdi->tag) |
| 1228 | { |
| 1229 | case DW_TAG_subprogram: |
| 1230 | if (pdi->is_external) |
| 1231 | { |
| 1232 | /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr, |
| 1233 | mst_text, objfile); */ |
| 1234 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1235 | VAR_NAMESPACE, LOC_BLOCK, |
| 1236 | &objfile->global_psymbols, |
| 1237 | 0, pdi->lowpc + baseaddr, cu_language, objfile); |
| 1238 | } |
| 1239 | else |
| 1240 | { |
| 1241 | /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr, |
| 1242 | mst_file_text, objfile); */ |
| 1243 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1244 | VAR_NAMESPACE, LOC_BLOCK, |
| 1245 | &objfile->static_psymbols, |
| 1246 | 0, pdi->lowpc + baseaddr, cu_language, objfile); |
| 1247 | } |
| 1248 | break; |
| 1249 | case DW_TAG_variable: |
| 1250 | if (pdi->is_external) |
| 1251 | { |
| 1252 | /* Global Variable. |
| 1253 | Don't enter into the minimal symbol tables as there is |
| 1254 | a minimal symbol table entry from the ELF symbols already. |
| 1255 | Enter into partial symbol table if it has a location |
| 1256 | descriptor or a type. |
| 1257 | If the location descriptor is missing, new_symbol will create |
| 1258 | a LOC_UNRESOLVED symbol, the address of the variable will then |
| 1259 | be determined from the minimal symbol table whenever the variable |
| 1260 | is referenced. |
| 1261 | The address for the partial symbol table entry is not |
| 1262 | used by GDB, but it comes in handy for debugging partial symbol |
| 1263 | table building. */ |
| 1264 | |
| 1265 | if (pdi->locdesc) |
| 1266 | addr = decode_locdesc (pdi->locdesc, objfile, cu_header); |
| 1267 | if (pdi->locdesc || pdi->has_type) |
| 1268 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1269 | VAR_NAMESPACE, LOC_STATIC, |
| 1270 | &objfile->global_psymbols, |
| 1271 | 0, addr + baseaddr, cu_language, objfile); |
| 1272 | } |
| 1273 | else |
| 1274 | { |
| 1275 | /* Static Variable. Skip symbols without location descriptors. */ |
| 1276 | if (pdi->locdesc == NULL) |
| 1277 | return; |
| 1278 | addr = decode_locdesc (pdi->locdesc, objfile, cu_header); |
| 1279 | /*prim_record_minimal_symbol (pdi->name, addr + baseaddr, |
| 1280 | mst_file_data, objfile); */ |
| 1281 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1282 | VAR_NAMESPACE, LOC_STATIC, |
| 1283 | &objfile->static_psymbols, |
| 1284 | 0, addr + baseaddr, cu_language, objfile); |
| 1285 | } |
| 1286 | break; |
| 1287 | case DW_TAG_typedef: |
| 1288 | case DW_TAG_base_type: |
| 1289 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1290 | VAR_NAMESPACE, LOC_TYPEDEF, |
| 1291 | &objfile->static_psymbols, |
| 1292 | 0, (CORE_ADDR) 0, cu_language, objfile); |
| 1293 | break; |
| 1294 | case DW_TAG_class_type: |
| 1295 | case DW_TAG_structure_type: |
| 1296 | case DW_TAG_union_type: |
| 1297 | case DW_TAG_enumeration_type: |
| 1298 | /* Skip aggregate types without children, these are external |
| 1299 | references. */ |
| 1300 | if (pdi->has_children == 0) |
| 1301 | return; |
| 1302 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1303 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
| 1304 | &objfile->static_psymbols, |
| 1305 | 0, (CORE_ADDR) 0, cu_language, objfile); |
| 1306 | |
| 1307 | if (cu_language == language_cplus) |
| 1308 | { |
| 1309 | /* For C++, these implicitly act as typedefs as well. */ |
| 1310 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1311 | VAR_NAMESPACE, LOC_TYPEDEF, |
| 1312 | &objfile->static_psymbols, |
| 1313 | 0, (CORE_ADDR) 0, cu_language, objfile); |
| 1314 | } |
| 1315 | break; |
| 1316 | case DW_TAG_enumerator: |
| 1317 | add_psymbol_to_list (pdi->name, strlen (pdi->name), |
| 1318 | VAR_NAMESPACE, LOC_CONST, |
| 1319 | &objfile->static_psymbols, |
| 1320 | 0, (CORE_ADDR) 0, cu_language, objfile); |
| 1321 | break; |
| 1322 | default: |
| 1323 | break; |
| 1324 | } |
| 1325 | } |
| 1326 | |
| 1327 | /* Expand this partial symbol table into a full symbol table. */ |
| 1328 | |
| 1329 | static void |
| 1330 | dwarf2_psymtab_to_symtab (struct partial_symtab *pst) |
| 1331 | { |
| 1332 | /* FIXME: This is barely more than a stub. */ |
| 1333 | if (pst != NULL) |
| 1334 | { |
| 1335 | if (pst->readin) |
| 1336 | { |
| 1337 | warning ("bug: psymtab for %s is already read in.", pst->filename); |
| 1338 | } |
| 1339 | else |
| 1340 | { |
| 1341 | if (info_verbose) |
| 1342 | { |
| 1343 | printf_filtered ("Reading in symbols for %s...", pst->filename); |
| 1344 | gdb_flush (gdb_stdout); |
| 1345 | } |
| 1346 | |
| 1347 | psymtab_to_symtab_1 (pst); |
| 1348 | |
| 1349 | /* Finish up the debug error message. */ |
| 1350 | if (info_verbose) |
| 1351 | printf_filtered ("done.\n"); |
| 1352 | } |
| 1353 | } |
| 1354 | } |
| 1355 | |
| 1356 | static void |
| 1357 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
| 1358 | { |
| 1359 | struct objfile *objfile = pst->objfile; |
| 1360 | bfd *abfd = objfile->obfd; |
| 1361 | struct comp_unit_head cu_header; |
| 1362 | struct die_info *dies; |
| 1363 | unsigned long offset; |
| 1364 | CORE_ADDR lowpc, highpc; |
| 1365 | struct die_info *child_die; |
| 1366 | char *info_ptr; |
| 1367 | struct symtab *symtab; |
| 1368 | struct cleanup *back_to; |
| 1369 | |
| 1370 | /* Set local variables from the partial symbol table info. */ |
| 1371 | offset = DWARF_INFO_OFFSET (pst); |
| 1372 | dwarf_info_buffer = DWARF_INFO_BUFFER (pst); |
| 1373 | dwarf_abbrev_buffer = DWARF_ABBREV_BUFFER (pst); |
| 1374 | dwarf_abbrev_size = DWARF_ABBREV_SIZE (pst); |
| 1375 | dwarf_line_buffer = DWARF_LINE_BUFFER (pst); |
| 1376 | baseaddr = ANOFFSET (pst->section_offsets, SECT_OFF_TEXT (objfile)); |
| 1377 | cu_header_offset = offset; |
| 1378 | info_ptr = dwarf_info_buffer + offset; |
| 1379 | |
| 1380 | obstack_init (&dwarf2_tmp_obstack); |
| 1381 | back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL); |
| 1382 | |
| 1383 | buildsym_init (); |
| 1384 | make_cleanup (really_free_pendings, NULL); |
| 1385 | |
| 1386 | /* read in the comp_unit header */ |
| 1387 | info_ptr = read_comp_unit_head (&cu_header, info_ptr, abfd); |
| 1388 | |
| 1389 | /* Read the abbrevs for this compilation unit */ |
| 1390 | dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset); |
| 1391 | make_cleanup (dwarf2_empty_abbrev_table, NULL); |
| 1392 | |
| 1393 | dies = read_comp_unit (info_ptr, abfd, &cu_header); |
| 1394 | |
| 1395 | make_cleanup_free_die_list (dies); |
| 1396 | |
| 1397 | /* Do line number decoding in read_file_scope () */ |
| 1398 | process_die (dies, objfile, &cu_header); |
| 1399 | |
| 1400 | if (!dwarf2_get_pc_bounds (dies, &lowpc, &highpc, objfile)) |
| 1401 | { |
| 1402 | /* Some compilers don't define a DW_AT_high_pc attribute for |
| 1403 | the compilation unit. If the DW_AT_high_pc is missing, |
| 1404 | synthesize it, by scanning the DIE's below the compilation unit. */ |
| 1405 | highpc = 0; |
| 1406 | if (dies->has_children) |
| 1407 | { |
| 1408 | child_die = dies->next; |
| 1409 | while (child_die && child_die->tag) |
| 1410 | { |
| 1411 | if (child_die->tag == DW_TAG_subprogram) |
| 1412 | { |
| 1413 | CORE_ADDR low, high; |
| 1414 | |
| 1415 | if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile)) |
| 1416 | { |
| 1417 | highpc = max (highpc, high); |
| 1418 | } |
| 1419 | } |
| 1420 | child_die = sibling_die (child_die); |
| 1421 | } |
| 1422 | } |
| 1423 | } |
| 1424 | symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile)); |
| 1425 | |
| 1426 | /* Set symtab language to language from DW_AT_language. |
| 1427 | If the compilation is from a C file generated by language preprocessors, |
| 1428 | do not set the language if it was already deduced by start_subfile. */ |
| 1429 | if (symtab != NULL |
| 1430 | && !(cu_language == language_c && symtab->language != language_c)) |
| 1431 | { |
| 1432 | symtab->language = cu_language; |
| 1433 | } |
| 1434 | pst->symtab = symtab; |
| 1435 | pst->readin = 1; |
| 1436 | sort_symtab_syms (pst->symtab); |
| 1437 | |
| 1438 | do_cleanups (back_to); |
| 1439 | } |
| 1440 | |
| 1441 | /* Process a die and its children. */ |
| 1442 | |
| 1443 | static void |
| 1444 | process_die (struct die_info *die, struct objfile *objfile, |
| 1445 | const struct comp_unit_head *cu_header) |
| 1446 | { |
| 1447 | switch (die->tag) |
| 1448 | { |
| 1449 | case DW_TAG_padding: |
| 1450 | break; |
| 1451 | case DW_TAG_compile_unit: |
| 1452 | read_file_scope (die, objfile, cu_header); |
| 1453 | break; |
| 1454 | case DW_TAG_subprogram: |
| 1455 | read_subroutine_type (die, objfile, cu_header); |
| 1456 | read_func_scope (die, objfile, cu_header); |
| 1457 | break; |
| 1458 | case DW_TAG_inlined_subroutine: |
| 1459 | /* FIXME: These are ignored for now. |
| 1460 | They could be used to set breakpoints on all inlined instances |
| 1461 | of a function and make GDB `next' properly over inlined functions. */ |
| 1462 | break; |
| 1463 | case DW_TAG_lexical_block: |
| 1464 | read_lexical_block_scope (die, objfile, cu_header); |
| 1465 | break; |
| 1466 | case DW_TAG_class_type: |
| 1467 | case DW_TAG_structure_type: |
| 1468 | case DW_TAG_union_type: |
| 1469 | read_structure_scope (die, objfile, cu_header); |
| 1470 | break; |
| 1471 | case DW_TAG_enumeration_type: |
| 1472 | read_enumeration (die, objfile, cu_header); |
| 1473 | break; |
| 1474 | case DW_TAG_subroutine_type: |
| 1475 | read_subroutine_type (die, objfile, cu_header); |
| 1476 | break; |
| 1477 | case DW_TAG_array_type: |
| 1478 | read_array_type (die, objfile, cu_header); |
| 1479 | break; |
| 1480 | case DW_TAG_pointer_type: |
| 1481 | read_tag_pointer_type (die, objfile, cu_header); |
| 1482 | break; |
| 1483 | case DW_TAG_ptr_to_member_type: |
| 1484 | read_tag_ptr_to_member_type (die, objfile, cu_header); |
| 1485 | break; |
| 1486 | case DW_TAG_reference_type: |
| 1487 | read_tag_reference_type (die, objfile, cu_header); |
| 1488 | break; |
| 1489 | case DW_TAG_string_type: |
| 1490 | read_tag_string_type (die, objfile); |
| 1491 | break; |
| 1492 | case DW_TAG_base_type: |
| 1493 | read_base_type (die, objfile); |
| 1494 | if (dwarf_attr (die, DW_AT_name)) |
| 1495 | { |
| 1496 | /* Add a typedef symbol for the base type definition. */ |
| 1497 | new_symbol (die, die->type, objfile, cu_header); |
| 1498 | } |
| 1499 | break; |
| 1500 | case DW_TAG_common_block: |
| 1501 | read_common_block (die, objfile, cu_header); |
| 1502 | break; |
| 1503 | case DW_TAG_common_inclusion: |
| 1504 | break; |
| 1505 | default: |
| 1506 | new_symbol (die, NULL, objfile, cu_header); |
| 1507 | break; |
| 1508 | } |
| 1509 | } |
| 1510 | |
| 1511 | static void |
| 1512 | read_file_scope (struct die_info *die, struct objfile *objfile, |
| 1513 | const struct comp_unit_head *cu_header) |
| 1514 | { |
| 1515 | unsigned int line_offset = 0; |
| 1516 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
| 1517 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
| 1518 | struct attribute *attr; |
| 1519 | char *name = "<unknown>"; |
| 1520 | char *comp_dir = NULL; |
| 1521 | struct die_info *child_die; |
| 1522 | bfd *abfd = objfile->obfd; |
| 1523 | |
| 1524 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile)) |
| 1525 | { |
| 1526 | if (die->has_children) |
| 1527 | { |
| 1528 | child_die = die->next; |
| 1529 | while (child_die && child_die->tag) |
| 1530 | { |
| 1531 | if (child_die->tag == DW_TAG_subprogram) |
| 1532 | { |
| 1533 | CORE_ADDR low, high; |
| 1534 | |
| 1535 | if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile)) |
| 1536 | { |
| 1537 | lowpc = min (lowpc, low); |
| 1538 | highpc = max (highpc, high); |
| 1539 | } |
| 1540 | } |
| 1541 | child_die = sibling_die (child_die); |
| 1542 | } |
| 1543 | } |
| 1544 | } |
| 1545 | |
| 1546 | /* If we didn't find a lowpc, set it to highpc to avoid complaints |
| 1547 | from finish_block. */ |
| 1548 | if (lowpc == ((CORE_ADDR) -1)) |
| 1549 | lowpc = highpc; |
| 1550 | lowpc += baseaddr; |
| 1551 | highpc += baseaddr; |
| 1552 | |
| 1553 | attr = dwarf_attr (die, DW_AT_name); |
| 1554 | if (attr) |
| 1555 | { |
| 1556 | name = DW_STRING (attr); |
| 1557 | } |
| 1558 | attr = dwarf_attr (die, DW_AT_comp_dir); |
| 1559 | if (attr) |
| 1560 | { |
| 1561 | comp_dir = DW_STRING (attr); |
| 1562 | if (comp_dir) |
| 1563 | { |
| 1564 | /* Irix 6.2 native cc prepends <machine>.: to the compilation |
| 1565 | directory, get rid of it. */ |
| 1566 | char *cp = strchr (comp_dir, ':'); |
| 1567 | |
| 1568 | if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/') |
| 1569 | comp_dir = cp + 1; |
| 1570 | } |
| 1571 | } |
| 1572 | |
| 1573 | if (objfile->ei.entry_point >= lowpc && |
| 1574 | objfile->ei.entry_point < highpc) |
| 1575 | { |
| 1576 | objfile->ei.entry_file_lowpc = lowpc; |
| 1577 | objfile->ei.entry_file_highpc = highpc; |
| 1578 | } |
| 1579 | |
| 1580 | attr = dwarf_attr (die, DW_AT_language); |
| 1581 | if (attr) |
| 1582 | { |
| 1583 | set_cu_language (DW_UNSND (attr)); |
| 1584 | } |
| 1585 | |
| 1586 | /* We assume that we're processing GCC output. */ |
| 1587 | processing_gcc_compilation = 2; |
| 1588 | #if 0 |
| 1589 | /* FIXME:Do something here. */ |
| 1590 | if (dip->at_producer != NULL) |
| 1591 | { |
| 1592 | handle_producer (dip->at_producer); |
| 1593 | } |
| 1594 | #endif |
| 1595 | |
| 1596 | /* The compilation unit may be in a different language or objfile, |
| 1597 | zero out all remembered fundamental types. */ |
| 1598 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); |
| 1599 | |
| 1600 | start_symtab (name, comp_dir, lowpc); |
| 1601 | record_debugformat ("DWARF 2"); |
| 1602 | |
| 1603 | /* Decode line number information if present. */ |
| 1604 | attr = dwarf_attr (die, DW_AT_stmt_list); |
| 1605 | if (attr) |
| 1606 | { |
| 1607 | line_offset = DW_UNSND (attr); |
| 1608 | dwarf_decode_lines (line_offset, comp_dir, abfd, cu_header); |
| 1609 | } |
| 1610 | |
| 1611 | /* Process all dies in compilation unit. */ |
| 1612 | if (die->has_children) |
| 1613 | { |
| 1614 | child_die = die->next; |
| 1615 | while (child_die && child_die->tag) |
| 1616 | { |
| 1617 | process_die (child_die, objfile, cu_header); |
| 1618 | child_die = sibling_die (child_die); |
| 1619 | } |
| 1620 | } |
| 1621 | } |
| 1622 | |
| 1623 | static void |
| 1624 | read_func_scope (struct die_info *die, struct objfile *objfile, |
| 1625 | const struct comp_unit_head *cu_header) |
| 1626 | { |
| 1627 | register struct context_stack *new; |
| 1628 | CORE_ADDR lowpc; |
| 1629 | CORE_ADDR highpc; |
| 1630 | struct die_info *child_die; |
| 1631 | struct attribute *attr; |
| 1632 | char *name; |
| 1633 | |
| 1634 | name = dwarf2_linkage_name (die); |
| 1635 | |
| 1636 | /* Ignore functions with missing or empty names and functions with |
| 1637 | missing or invalid low and high pc attributes. */ |
| 1638 | if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile)) |
| 1639 | return; |
| 1640 | |
| 1641 | lowpc += baseaddr; |
| 1642 | highpc += baseaddr; |
| 1643 | |
| 1644 | if (objfile->ei.entry_point >= lowpc && |
| 1645 | objfile->ei.entry_point < highpc) |
| 1646 | { |
| 1647 | objfile->ei.entry_func_lowpc = lowpc; |
| 1648 | objfile->ei.entry_func_highpc = highpc; |
| 1649 | } |
| 1650 | |
| 1651 | /* Decode DW_AT_frame_base location descriptor if present, keep result |
| 1652 | for DW_OP_fbreg operands in decode_locdesc. */ |
| 1653 | frame_base_reg = -1; |
| 1654 | frame_base_offset = 0; |
| 1655 | attr = dwarf_attr (die, DW_AT_frame_base); |
| 1656 | if (attr) |
| 1657 | { |
| 1658 | CORE_ADDR addr = decode_locdesc (DW_BLOCK (attr), objfile, cu_header); |
| 1659 | if (isderef) |
| 1660 | complain (&dwarf2_unsupported_at_frame_base, name); |
| 1661 | else if (isreg) |
| 1662 | frame_base_reg = addr; |
| 1663 | else if (offreg) |
| 1664 | { |
| 1665 | frame_base_reg = basereg; |
| 1666 | frame_base_offset = addr; |
| 1667 | } |
| 1668 | else |
| 1669 | complain (&dwarf2_unsupported_at_frame_base, name); |
| 1670 | } |
| 1671 | |
| 1672 | new = push_context (0, lowpc); |
| 1673 | new->name = new_symbol (die, die->type, objfile, cu_header); |
| 1674 | list_in_scope = &local_symbols; |
| 1675 | |
| 1676 | if (die->has_children) |
| 1677 | { |
| 1678 | child_die = die->next; |
| 1679 | while (child_die && child_die->tag) |
| 1680 | { |
| 1681 | process_die (child_die, objfile, cu_header); |
| 1682 | child_die = sibling_die (child_die); |
| 1683 | } |
| 1684 | } |
| 1685 | |
| 1686 | new = pop_context (); |
| 1687 | /* Make a block for the local symbols within. */ |
| 1688 | finish_block (new->name, &local_symbols, new->old_blocks, |
| 1689 | lowpc, highpc, objfile); |
| 1690 | list_in_scope = &file_symbols; |
| 1691 | } |
| 1692 | |
| 1693 | /* Process all the DIES contained within a lexical block scope. Start |
| 1694 | a new scope, process the dies, and then close the scope. */ |
| 1695 | |
| 1696 | static void |
| 1697 | read_lexical_block_scope (struct die_info *die, struct objfile *objfile, |
| 1698 | const struct comp_unit_head *cu_header) |
| 1699 | { |
| 1700 | register struct context_stack *new; |
| 1701 | CORE_ADDR lowpc, highpc; |
| 1702 | struct die_info *child_die; |
| 1703 | |
| 1704 | /* Ignore blocks with missing or invalid low and high pc attributes. */ |
| 1705 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile)) |
| 1706 | return; |
| 1707 | lowpc += baseaddr; |
| 1708 | highpc += baseaddr; |
| 1709 | |
| 1710 | push_context (0, lowpc); |
| 1711 | if (die->has_children) |
| 1712 | { |
| 1713 | child_die = die->next; |
| 1714 | while (child_die && child_die->tag) |
| 1715 | { |
| 1716 | process_die (child_die, objfile, cu_header); |
| 1717 | child_die = sibling_die (child_die); |
| 1718 | } |
| 1719 | } |
| 1720 | new = pop_context (); |
| 1721 | |
| 1722 | if (local_symbols != NULL) |
| 1723 | { |
| 1724 | finish_block (0, &local_symbols, new->old_blocks, new->start_addr, |
| 1725 | highpc, objfile); |
| 1726 | } |
| 1727 | local_symbols = new->locals; |
| 1728 | } |
| 1729 | |
| 1730 | /* Get low and high pc attributes from a die. |
| 1731 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
| 1732 | |
| 1733 | static int |
| 1734 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 1735 | struct objfile *objfile) |
| 1736 | { |
| 1737 | struct attribute *attr; |
| 1738 | CORE_ADDR low; |
| 1739 | CORE_ADDR high; |
| 1740 | |
| 1741 | attr = dwarf_attr (die, DW_AT_low_pc); |
| 1742 | if (attr) |
| 1743 | low = DW_ADDR (attr); |
| 1744 | else |
| 1745 | return 0; |
| 1746 | attr = dwarf_attr (die, DW_AT_high_pc); |
| 1747 | if (attr) |
| 1748 | high = DW_ADDR (attr); |
| 1749 | else |
| 1750 | return 0; |
| 1751 | |
| 1752 | if (high < low) |
| 1753 | return 0; |
| 1754 | |
| 1755 | /* When using the GNU linker, .gnu.linkonce. sections are used to |
| 1756 | eliminate duplicate copies of functions and vtables and such. |
| 1757 | The linker will arbitrarily choose one and discard the others. |
| 1758 | The AT_*_pc values for such functions refer to local labels in |
| 1759 | these sections. If the section from that file was discarded, the |
| 1760 | labels are not in the output, so the relocs get a value of 0. |
| 1761 | If this is a discarded function, mark the pc bounds as invalid, |
| 1762 | so that GDB will ignore it. */ |
| 1763 | if (low == 0 && (bfd_get_file_flags (objfile->obfd) & HAS_RELOC) == 0) |
| 1764 | return 0; |
| 1765 | |
| 1766 | *lowpc = low; |
| 1767 | *highpc = high; |
| 1768 | return 1; |
| 1769 | } |
| 1770 | |
| 1771 | /* Add an aggregate field to the field list. */ |
| 1772 | |
| 1773 | static void |
| 1774 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
| 1775 | struct objfile *objfile, |
| 1776 | const struct comp_unit_head *cu_header) |
| 1777 | { |
| 1778 | struct nextfield *new_field; |
| 1779 | struct attribute *attr; |
| 1780 | struct field *fp; |
| 1781 | char *fieldname = ""; |
| 1782 | |
| 1783 | /* Allocate a new field list entry and link it in. */ |
| 1784 | new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); |
| 1785 | make_cleanup (xfree, new_field); |
| 1786 | memset (new_field, 0, sizeof (struct nextfield)); |
| 1787 | new_field->next = fip->fields; |
| 1788 | fip->fields = new_field; |
| 1789 | fip->nfields++; |
| 1790 | |
| 1791 | /* Handle accessibility and virtuality of field. |
| 1792 | The default accessibility for members is public, the default |
| 1793 | accessibility for inheritance is private. */ |
| 1794 | if (die->tag != DW_TAG_inheritance) |
| 1795 | new_field->accessibility = DW_ACCESS_public; |
| 1796 | else |
| 1797 | new_field->accessibility = DW_ACCESS_private; |
| 1798 | new_field->virtuality = DW_VIRTUALITY_none; |
| 1799 | |
| 1800 | attr = dwarf_attr (die, DW_AT_accessibility); |
| 1801 | if (attr) |
| 1802 | new_field->accessibility = DW_UNSND (attr); |
| 1803 | if (new_field->accessibility != DW_ACCESS_public) |
| 1804 | fip->non_public_fields = 1; |
| 1805 | attr = dwarf_attr (die, DW_AT_virtuality); |
| 1806 | if (attr) |
| 1807 | new_field->virtuality = DW_UNSND (attr); |
| 1808 | |
| 1809 | fp = &new_field->field; |
| 1810 | if (die->tag == DW_TAG_member) |
| 1811 | { |
| 1812 | /* Get type of field. */ |
| 1813 | fp->type = die_type (die, objfile, cu_header); |
| 1814 | |
| 1815 | /* Get bit size of field (zero if none). */ |
| 1816 | attr = dwarf_attr (die, DW_AT_bit_size); |
| 1817 | if (attr) |
| 1818 | { |
| 1819 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); |
| 1820 | } |
| 1821 | else |
| 1822 | { |
| 1823 | FIELD_BITSIZE (*fp) = 0; |
| 1824 | } |
| 1825 | |
| 1826 | /* Get bit offset of field. */ |
| 1827 | attr = dwarf_attr (die, DW_AT_data_member_location); |
| 1828 | if (attr) |
| 1829 | { |
| 1830 | FIELD_BITPOS (*fp) = |
| 1831 | decode_locdesc (DW_BLOCK (attr), objfile, cu_header) * bits_per_byte; |
| 1832 | } |
| 1833 | else |
| 1834 | FIELD_BITPOS (*fp) = 0; |
| 1835 | attr = dwarf_attr (die, DW_AT_bit_offset); |
| 1836 | if (attr) |
| 1837 | { |
| 1838 | if (BITS_BIG_ENDIAN) |
| 1839 | { |
| 1840 | /* For big endian bits, the DW_AT_bit_offset gives the |
| 1841 | additional bit offset from the MSB of the containing |
| 1842 | anonymous object to the MSB of the field. We don't |
| 1843 | have to do anything special since we don't need to |
| 1844 | know the size of the anonymous object. */ |
| 1845 | FIELD_BITPOS (*fp) += DW_UNSND (attr); |
| 1846 | } |
| 1847 | else |
| 1848 | { |
| 1849 | /* For little endian bits, compute the bit offset to the |
| 1850 | MSB of the anonymous object, subtract off the number of |
| 1851 | bits from the MSB of the field to the MSB of the |
| 1852 | object, and then subtract off the number of bits of |
| 1853 | the field itself. The result is the bit offset of |
| 1854 | the LSB of the field. */ |
| 1855 | int anonymous_size; |
| 1856 | int bit_offset = DW_UNSND (attr); |
| 1857 | |
| 1858 | attr = dwarf_attr (die, DW_AT_byte_size); |
| 1859 | if (attr) |
| 1860 | { |
| 1861 | /* The size of the anonymous object containing |
| 1862 | the bit field is explicit, so use the |
| 1863 | indicated size (in bytes). */ |
| 1864 | anonymous_size = DW_UNSND (attr); |
| 1865 | } |
| 1866 | else |
| 1867 | { |
| 1868 | /* The size of the anonymous object containing |
| 1869 | the bit field must be inferred from the type |
| 1870 | attribute of the data member containing the |
| 1871 | bit field. */ |
| 1872 | anonymous_size = TYPE_LENGTH (fp->type); |
| 1873 | } |
| 1874 | FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte |
| 1875 | - bit_offset - FIELD_BITSIZE (*fp); |
| 1876 | } |
| 1877 | } |
| 1878 | |
| 1879 | /* Get name of field. */ |
| 1880 | attr = dwarf_attr (die, DW_AT_name); |
| 1881 | if (attr && DW_STRING (attr)) |
| 1882 | fieldname = DW_STRING (attr); |
| 1883 | fp->name = obsavestring (fieldname, strlen (fieldname), |
| 1884 | &objfile->type_obstack); |
| 1885 | |
| 1886 | /* Change accessibility for artificial fields (e.g. virtual table |
| 1887 | pointer or virtual base class pointer) to private. */ |
| 1888 | if (dwarf_attr (die, DW_AT_artificial)) |
| 1889 | { |
| 1890 | new_field->accessibility = DW_ACCESS_private; |
| 1891 | fip->non_public_fields = 1; |
| 1892 | } |
| 1893 | } |
| 1894 | else if (die->tag == DW_TAG_variable) |
| 1895 | { |
| 1896 | char *physname; |
| 1897 | |
| 1898 | /* C++ static member. |
| 1899 | Get name of field. */ |
| 1900 | attr = dwarf_attr (die, DW_AT_name); |
| 1901 | if (attr && DW_STRING (attr)) |
| 1902 | fieldname = DW_STRING (attr); |
| 1903 | else |
| 1904 | return; |
| 1905 | |
| 1906 | /* Get physical name. */ |
| 1907 | physname = dwarf2_linkage_name (die); |
| 1908 | |
| 1909 | SET_FIELD_PHYSNAME (*fp, obsavestring (physname, strlen (physname), |
| 1910 | &objfile->type_obstack)); |
| 1911 | FIELD_TYPE (*fp) = die_type (die, objfile, cu_header); |
| 1912 | FIELD_NAME (*fp) = obsavestring (fieldname, strlen (fieldname), |
| 1913 | &objfile->type_obstack); |
| 1914 | } |
| 1915 | else if (die->tag == DW_TAG_inheritance) |
| 1916 | { |
| 1917 | /* C++ base class field. */ |
| 1918 | attr = dwarf_attr (die, DW_AT_data_member_location); |
| 1919 | if (attr) |
| 1920 | FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), objfile, cu_header) |
| 1921 | * bits_per_byte); |
| 1922 | FIELD_BITSIZE (*fp) = 0; |
| 1923 | FIELD_TYPE (*fp) = die_type (die, objfile, cu_header); |
| 1924 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
| 1925 | fip->nbaseclasses++; |
| 1926 | } |
| 1927 | } |
| 1928 | |
| 1929 | /* Create the vector of fields, and attach it to the type. */ |
| 1930 | |
| 1931 | static void |
| 1932 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
| 1933 | struct objfile *objfile) |
| 1934 | { |
| 1935 | int nfields = fip->nfields; |
| 1936 | |
| 1937 | /* Record the field count, allocate space for the array of fields, |
| 1938 | and create blank accessibility bitfields if necessary. */ |
| 1939 | TYPE_NFIELDS (type) = nfields; |
| 1940 | TYPE_FIELDS (type) = (struct field *) |
| 1941 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
| 1942 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); |
| 1943 | |
| 1944 | if (fip->non_public_fields) |
| 1945 | { |
| 1946 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 1947 | |
| 1948 | TYPE_FIELD_PRIVATE_BITS (type) = |
| 1949 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 1950 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); |
| 1951 | |
| 1952 | TYPE_FIELD_PROTECTED_BITS (type) = |
| 1953 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 1954 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); |
| 1955 | |
| 1956 | TYPE_FIELD_IGNORE_BITS (type) = |
| 1957 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 1958 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); |
| 1959 | } |
| 1960 | |
| 1961 | /* If the type has baseclasses, allocate and clear a bit vector for |
| 1962 | TYPE_FIELD_VIRTUAL_BITS. */ |
| 1963 | if (fip->nbaseclasses) |
| 1964 | { |
| 1965 | int num_bytes = B_BYTES (fip->nbaseclasses); |
| 1966 | char *pointer; |
| 1967 | |
| 1968 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 1969 | pointer = (char *) TYPE_ALLOC (type, num_bytes); |
| 1970 | TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer; |
| 1971 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
| 1972 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; |
| 1973 | } |
| 1974 | |
| 1975 | /* Copy the saved-up fields into the field vector. Start from the head |
| 1976 | of the list, adding to the tail of the field array, so that they end |
| 1977 | up in the same order in the array in which they were added to the list. */ |
| 1978 | while (nfields-- > 0) |
| 1979 | { |
| 1980 | TYPE_FIELD (type, nfields) = fip->fields->field; |
| 1981 | switch (fip->fields->accessibility) |
| 1982 | { |
| 1983 | case DW_ACCESS_private: |
| 1984 | SET_TYPE_FIELD_PRIVATE (type, nfields); |
| 1985 | break; |
| 1986 | |
| 1987 | case DW_ACCESS_protected: |
| 1988 | SET_TYPE_FIELD_PROTECTED (type, nfields); |
| 1989 | break; |
| 1990 | |
| 1991 | case DW_ACCESS_public: |
| 1992 | break; |
| 1993 | |
| 1994 | default: |
| 1995 | /* Unknown accessibility. Complain and treat it as public. */ |
| 1996 | { |
| 1997 | complain (&dwarf2_unsupported_accessibility, |
| 1998 | fip->fields->accessibility); |
| 1999 | } |
| 2000 | break; |
| 2001 | } |
| 2002 | if (nfields < fip->nbaseclasses) |
| 2003 | { |
| 2004 | switch (fip->fields->virtuality) |
| 2005 | { |
| 2006 | case DW_VIRTUALITY_virtual: |
| 2007 | case DW_VIRTUALITY_pure_virtual: |
| 2008 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
| 2009 | break; |
| 2010 | } |
| 2011 | } |
| 2012 | fip->fields = fip->fields->next; |
| 2013 | } |
| 2014 | } |
| 2015 | |
| 2016 | /* Add a member function to the proper fieldlist. */ |
| 2017 | |
| 2018 | static void |
| 2019 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
| 2020 | struct type *type, struct objfile *objfile, |
| 2021 | const struct comp_unit_head *cu_header) |
| 2022 | { |
| 2023 | struct attribute *attr; |
| 2024 | struct fnfieldlist *flp; |
| 2025 | int i; |
| 2026 | struct fn_field *fnp; |
| 2027 | char *fieldname; |
| 2028 | char *physname; |
| 2029 | struct nextfnfield *new_fnfield; |
| 2030 | |
| 2031 | /* Get name of member function. */ |
| 2032 | attr = dwarf_attr (die, DW_AT_name); |
| 2033 | if (attr && DW_STRING (attr)) |
| 2034 | fieldname = DW_STRING (attr); |
| 2035 | else |
| 2036 | return; |
| 2037 | |
| 2038 | /* Get the mangled name. */ |
| 2039 | physname = dwarf2_linkage_name (die); |
| 2040 | |
| 2041 | /* Look up member function name in fieldlist. */ |
| 2042 | for (i = 0; i < fip->nfnfields; i++) |
| 2043 | { |
| 2044 | if (STREQ (fip->fnfieldlists[i].name, fieldname)) |
| 2045 | break; |
| 2046 | } |
| 2047 | |
| 2048 | /* Create new list element if necessary. */ |
| 2049 | if (i < fip->nfnfields) |
| 2050 | flp = &fip->fnfieldlists[i]; |
| 2051 | else |
| 2052 | { |
| 2053 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) |
| 2054 | { |
| 2055 | fip->fnfieldlists = (struct fnfieldlist *) |
| 2056 | xrealloc (fip->fnfieldlists, |
| 2057 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) |
| 2058 | * sizeof (struct fnfieldlist)); |
| 2059 | if (fip->nfnfields == 0) |
| 2060 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
| 2061 | } |
| 2062 | flp = &fip->fnfieldlists[fip->nfnfields]; |
| 2063 | flp->name = fieldname; |
| 2064 | flp->length = 0; |
| 2065 | flp->head = NULL; |
| 2066 | fip->nfnfields++; |
| 2067 | } |
| 2068 | |
| 2069 | /* Create a new member function field and chain it to the field list |
| 2070 | entry. */ |
| 2071 | new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); |
| 2072 | make_cleanup (xfree, new_fnfield); |
| 2073 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
| 2074 | new_fnfield->next = flp->head; |
| 2075 | flp->head = new_fnfield; |
| 2076 | flp->length++; |
| 2077 | |
| 2078 | /* Fill in the member function field info. */ |
| 2079 | fnp = &new_fnfield->fnfield; |
| 2080 | fnp->physname = obsavestring (physname, strlen (physname), |
| 2081 | &objfile->type_obstack); |
| 2082 | fnp->type = alloc_type (objfile); |
| 2083 | if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC) |
| 2084 | { |
| 2085 | struct type *return_type = TYPE_TARGET_TYPE (die->type); |
| 2086 | struct type **arg_types; |
| 2087 | int nparams = TYPE_NFIELDS (die->type); |
| 2088 | int iparams; |
| 2089 | |
| 2090 | /* Copy argument types from the subroutine type. */ |
| 2091 | arg_types = (struct type **) |
| 2092 | TYPE_ALLOC (fnp->type, (nparams + 1) * sizeof (struct type *)); |
| 2093 | for (iparams = 0; iparams < nparams; iparams++) |
| 2094 | arg_types[iparams] = TYPE_FIELD_TYPE (die->type, iparams); |
| 2095 | |
| 2096 | /* Set last entry in argument type vector. */ |
| 2097 | if (TYPE_FLAGS (die->type) & TYPE_FLAG_VARARGS) |
| 2098 | arg_types[nparams] = NULL; |
| 2099 | else |
| 2100 | arg_types[nparams] = dwarf2_fundamental_type (objfile, FT_VOID); |
| 2101 | |
| 2102 | smash_to_method_type (fnp->type, type, return_type, arg_types); |
| 2103 | |
| 2104 | /* Handle static member functions. |
| 2105 | Dwarf2 has no clean way to discern C++ static and non-static |
| 2106 | member functions. G++ helps GDB by marking the first |
| 2107 | parameter for non-static member functions (which is the |
| 2108 | this pointer) as artificial. We obtain this information |
| 2109 | from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ |
| 2110 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0) |
| 2111 | fnp->voffset = VOFFSET_STATIC; |
| 2112 | } |
| 2113 | else |
| 2114 | complain (&dwarf2_missing_member_fn_type_complaint, physname); |
| 2115 | |
| 2116 | /* Get fcontext from DW_AT_containing_type if present. */ |
| 2117 | if (dwarf_attr (die, DW_AT_containing_type) != NULL) |
| 2118 | fnp->fcontext = die_containing_type (die, objfile, cu_header); |
| 2119 | |
| 2120 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const |
| 2121 | and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ |
| 2122 | |
| 2123 | /* Get accessibility. */ |
| 2124 | attr = dwarf_attr (die, DW_AT_accessibility); |
| 2125 | if (attr) |
| 2126 | { |
| 2127 | switch (DW_UNSND (attr)) |
| 2128 | { |
| 2129 | case DW_ACCESS_private: |
| 2130 | fnp->is_private = 1; |
| 2131 | break; |
| 2132 | case DW_ACCESS_protected: |
| 2133 | fnp->is_protected = 1; |
| 2134 | break; |
| 2135 | } |
| 2136 | } |
| 2137 | |
| 2138 | /* Get index in virtual function table if it is a virtual member function. */ |
| 2139 | attr = dwarf_attr (die, DW_AT_vtable_elem_location); |
| 2140 | if (attr) |
| 2141 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), objfile, cu_header) + 2; |
| 2142 | } |
| 2143 | |
| 2144 | /* Create the vector of member function fields, and attach it to the type. */ |
| 2145 | |
| 2146 | static void |
| 2147 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
| 2148 | struct objfile *objfile) |
| 2149 | { |
| 2150 | struct fnfieldlist *flp; |
| 2151 | int total_length = 0; |
| 2152 | int i; |
| 2153 | |
| 2154 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 2155 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) |
| 2156 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); |
| 2157 | |
| 2158 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) |
| 2159 | { |
| 2160 | struct nextfnfield *nfp = flp->head; |
| 2161 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
| 2162 | int k; |
| 2163 | |
| 2164 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; |
| 2165 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; |
| 2166 | fn_flp->fn_fields = (struct fn_field *) |
| 2167 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); |
| 2168 | for (k = flp->length; (k--, nfp); nfp = nfp->next) |
| 2169 | fn_flp->fn_fields[k] = nfp->fnfield; |
| 2170 | |
| 2171 | total_length += flp->length; |
| 2172 | } |
| 2173 | |
| 2174 | TYPE_NFN_FIELDS (type) = fip->nfnfields; |
| 2175 | TYPE_NFN_FIELDS_TOTAL (type) = total_length; |
| 2176 | } |
| 2177 | |
| 2178 | /* Called when we find the DIE that starts a structure or union scope |
| 2179 | (definition) to process all dies that define the members of the |
| 2180 | structure or union. |
| 2181 | |
| 2182 | NOTE: we need to call struct_type regardless of whether or not the |
| 2183 | DIE has an at_name attribute, since it might be an anonymous |
| 2184 | structure or union. This gets the type entered into our set of |
| 2185 | user defined types. |
| 2186 | |
| 2187 | However, if the structure is incomplete (an opaque struct/union) |
| 2188 | then suppress creating a symbol table entry for it since gdb only |
| 2189 | wants to find the one with the complete definition. Note that if |
| 2190 | it is complete, we just call new_symbol, which does it's own |
| 2191 | checking about whether the struct/union is anonymous or not (and |
| 2192 | suppresses creating a symbol table entry itself). */ |
| 2193 | |
| 2194 | static void |
| 2195 | read_structure_scope (struct die_info *die, struct objfile *objfile, |
| 2196 | const struct comp_unit_head *cu_header) |
| 2197 | { |
| 2198 | struct type *type; |
| 2199 | struct attribute *attr; |
| 2200 | |
| 2201 | type = alloc_type (objfile); |
| 2202 | |
| 2203 | INIT_CPLUS_SPECIFIC (type); |
| 2204 | attr = dwarf_attr (die, DW_AT_name); |
| 2205 | if (attr && DW_STRING (attr)) |
| 2206 | { |
| 2207 | TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr), |
| 2208 | strlen (DW_STRING (attr)), |
| 2209 | &objfile->type_obstack); |
| 2210 | } |
| 2211 | |
| 2212 | if (die->tag == DW_TAG_structure_type) |
| 2213 | { |
| 2214 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
| 2215 | } |
| 2216 | else if (die->tag == DW_TAG_union_type) |
| 2217 | { |
| 2218 | TYPE_CODE (type) = TYPE_CODE_UNION; |
| 2219 | } |
| 2220 | else |
| 2221 | { |
| 2222 | /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT |
| 2223 | in gdbtypes.h. */ |
| 2224 | TYPE_CODE (type) = TYPE_CODE_CLASS; |
| 2225 | } |
| 2226 | |
| 2227 | attr = dwarf_attr (die, DW_AT_byte_size); |
| 2228 | if (attr) |
| 2229 | { |
| 2230 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 2231 | } |
| 2232 | else |
| 2233 | { |
| 2234 | TYPE_LENGTH (type) = 0; |
| 2235 | } |
| 2236 | |
| 2237 | /* We need to add the type field to the die immediately so we don't |
| 2238 | infinitely recurse when dealing with pointers to the structure |
| 2239 | type within the structure itself. */ |
| 2240 | die->type = type; |
| 2241 | |
| 2242 | if (die->has_children && ! die_is_declaration (die)) |
| 2243 | { |
| 2244 | struct field_info fi; |
| 2245 | struct die_info *child_die; |
| 2246 | struct cleanup *back_to = make_cleanup (null_cleanup, NULL); |
| 2247 | |
| 2248 | memset (&fi, 0, sizeof (struct field_info)); |
| 2249 | |
| 2250 | child_die = die->next; |
| 2251 | |
| 2252 | while (child_die && child_die->tag) |
| 2253 | { |
| 2254 | if (child_die->tag == DW_TAG_member) |
| 2255 | { |
| 2256 | dwarf2_add_field (&fi, child_die, objfile, cu_header); |
| 2257 | } |
| 2258 | else if (child_die->tag == DW_TAG_variable) |
| 2259 | { |
| 2260 | /* C++ static member. */ |
| 2261 | dwarf2_add_field (&fi, child_die, objfile, cu_header); |
| 2262 | } |
| 2263 | else if (child_die->tag == DW_TAG_subprogram) |
| 2264 | { |
| 2265 | /* C++ member function. */ |
| 2266 | process_die (child_die, objfile, cu_header); |
| 2267 | dwarf2_add_member_fn (&fi, child_die, type, objfile, cu_header); |
| 2268 | } |
| 2269 | else if (child_die->tag == DW_TAG_inheritance) |
| 2270 | { |
| 2271 | /* C++ base class field. */ |
| 2272 | dwarf2_add_field (&fi, child_die, objfile, cu_header); |
| 2273 | } |
| 2274 | else |
| 2275 | { |
| 2276 | process_die (child_die, objfile, cu_header); |
| 2277 | } |
| 2278 | child_die = sibling_die (child_die); |
| 2279 | } |
| 2280 | |
| 2281 | /* Attach fields and member functions to the type. */ |
| 2282 | if (fi.nfields) |
| 2283 | dwarf2_attach_fields_to_type (&fi, type, objfile); |
| 2284 | if (fi.nfnfields) |
| 2285 | { |
| 2286 | dwarf2_attach_fn_fields_to_type (&fi, type, objfile); |
| 2287 | |
| 2288 | /* Get the type which refers to the base class (possibly this |
| 2289 | class itself) which contains the vtable pointer for the current |
| 2290 | class from the DW_AT_containing_type attribute. */ |
| 2291 | |
| 2292 | if (dwarf_attr (die, DW_AT_containing_type) != NULL) |
| 2293 | { |
| 2294 | struct type *t = die_containing_type (die, objfile, cu_header); |
| 2295 | |
| 2296 | TYPE_VPTR_BASETYPE (type) = t; |
| 2297 | if (type == t) |
| 2298 | { |
| 2299 | static const char vptr_name[] = |
| 2300 | {'_', 'v', 'p', 't', 'r', '\0'}; |
| 2301 | int i; |
| 2302 | |
| 2303 | /* Our own class provides vtbl ptr. */ |
| 2304 | for (i = TYPE_NFIELDS (t) - 1; |
| 2305 | i >= TYPE_N_BASECLASSES (t); |
| 2306 | --i) |
| 2307 | { |
| 2308 | char *fieldname = TYPE_FIELD_NAME (t, i); |
| 2309 | |
| 2310 | if (STREQN (fieldname, vptr_name, strlen (vptr_name) - 1) |
| 2311 | && is_cplus_marker (fieldname[strlen (vptr_name)])) |
| 2312 | { |
| 2313 | TYPE_VPTR_FIELDNO (type) = i; |
| 2314 | break; |
| 2315 | } |
| 2316 | } |
| 2317 | |
| 2318 | /* Complain if virtual function table field not found. */ |
| 2319 | if (i < TYPE_N_BASECLASSES (t)) |
| 2320 | complain (&dwarf2_vtbl_not_found_complaint, |
| 2321 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : ""); |
| 2322 | } |
| 2323 | else |
| 2324 | { |
| 2325 | TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); |
| 2326 | } |
| 2327 | } |
| 2328 | } |
| 2329 | |
| 2330 | new_symbol (die, type, objfile, cu_header); |
| 2331 | |
| 2332 | do_cleanups (back_to); |
| 2333 | } |
| 2334 | else |
| 2335 | { |
| 2336 | /* No children, must be stub. */ |
| 2337 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; |
| 2338 | } |
| 2339 | |
| 2340 | die->type = type; |
| 2341 | } |
| 2342 | |
| 2343 | /* Given a pointer to a die which begins an enumeration, process all |
| 2344 | the dies that define the members of the enumeration. |
| 2345 | |
| 2346 | This will be much nicer in draft 6 of the DWARF spec when our |
| 2347 | members will be dies instead squished into the DW_AT_element_list |
| 2348 | attribute. |
| 2349 | |
| 2350 | NOTE: We reverse the order of the element list. */ |
| 2351 | |
| 2352 | static void |
| 2353 | read_enumeration (struct die_info *die, struct objfile *objfile, |
| 2354 | const struct comp_unit_head *cu_header) |
| 2355 | { |
| 2356 | struct die_info *child_die; |
| 2357 | struct type *type; |
| 2358 | struct field *fields; |
| 2359 | struct attribute *attr; |
| 2360 | struct symbol *sym; |
| 2361 | int num_fields; |
| 2362 | int unsigned_enum = 1; |
| 2363 | |
| 2364 | type = alloc_type (objfile); |
| 2365 | |
| 2366 | TYPE_CODE (type) = TYPE_CODE_ENUM; |
| 2367 | attr = dwarf_attr (die, DW_AT_name); |
| 2368 | if (attr && DW_STRING (attr)) |
| 2369 | { |
| 2370 | TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr), |
| 2371 | strlen (DW_STRING (attr)), |
| 2372 | &objfile->type_obstack); |
| 2373 | } |
| 2374 | |
| 2375 | attr = dwarf_attr (die, DW_AT_byte_size); |
| 2376 | if (attr) |
| 2377 | { |
| 2378 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 2379 | } |
| 2380 | else |
| 2381 | { |
| 2382 | TYPE_LENGTH (type) = 0; |
| 2383 | } |
| 2384 | |
| 2385 | num_fields = 0; |
| 2386 | fields = NULL; |
| 2387 | if (die->has_children) |
| 2388 | { |
| 2389 | child_die = die->next; |
| 2390 | while (child_die && child_die->tag) |
| 2391 | { |
| 2392 | if (child_die->tag != DW_TAG_enumerator) |
| 2393 | { |
| 2394 | process_die (child_die, objfile, cu_header); |
| 2395 | } |
| 2396 | else |
| 2397 | { |
| 2398 | attr = dwarf_attr (child_die, DW_AT_name); |
| 2399 | if (attr) |
| 2400 | { |
| 2401 | sym = new_symbol (child_die, type, objfile, cu_header); |
| 2402 | if (SYMBOL_VALUE (sym) < 0) |
| 2403 | unsigned_enum = 0; |
| 2404 | |
| 2405 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) |
| 2406 | { |
| 2407 | fields = (struct field *) |
| 2408 | xrealloc (fields, |
| 2409 | (num_fields + DW_FIELD_ALLOC_CHUNK) |
| 2410 | * sizeof (struct field)); |
| 2411 | } |
| 2412 | |
| 2413 | FIELD_NAME (fields[num_fields]) = SYMBOL_NAME (sym); |
| 2414 | FIELD_TYPE (fields[num_fields]) = NULL; |
| 2415 | FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym); |
| 2416 | FIELD_BITSIZE (fields[num_fields]) = 0; |
| 2417 | |
| 2418 | num_fields++; |
| 2419 | } |
| 2420 | } |
| 2421 | |
| 2422 | child_die = sibling_die (child_die); |
| 2423 | } |
| 2424 | |
| 2425 | if (num_fields) |
| 2426 | { |
| 2427 | TYPE_NFIELDS (type) = num_fields; |
| 2428 | TYPE_FIELDS (type) = (struct field *) |
| 2429 | TYPE_ALLOC (type, sizeof (struct field) * num_fields); |
| 2430 | memcpy (TYPE_FIELDS (type), fields, |
| 2431 | sizeof (struct field) * num_fields); |
| 2432 | xfree (fields); |
| 2433 | } |
| 2434 | if (unsigned_enum) |
| 2435 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; |
| 2436 | } |
| 2437 | die->type = type; |
| 2438 | new_symbol (die, type, objfile, cu_header); |
| 2439 | } |
| 2440 | |
| 2441 | /* Extract all information from a DW_TAG_array_type DIE and put it in |
| 2442 | the DIE's type field. For now, this only handles one dimensional |
| 2443 | arrays. */ |
| 2444 | |
| 2445 | static void |
| 2446 | read_array_type (struct die_info *die, struct objfile *objfile, |
| 2447 | const struct comp_unit_head *cu_header) |
| 2448 | { |
| 2449 | struct die_info *child_die; |
| 2450 | struct type *type = NULL; |
| 2451 | struct type *element_type, *range_type, *index_type; |
| 2452 | struct type **range_types = NULL; |
| 2453 | struct attribute *attr; |
| 2454 | int ndim = 0; |
| 2455 | struct cleanup *back_to; |
| 2456 | |
| 2457 | /* Return if we've already decoded this type. */ |
| 2458 | if (die->type) |
| 2459 | { |
| 2460 | return; |
| 2461 | } |
| 2462 | |
| 2463 | element_type = die_type (die, objfile, cu_header); |
| 2464 | |
| 2465 | /* Irix 6.2 native cc creates array types without children for |
| 2466 | arrays with unspecified length. */ |
| 2467 | if (die->has_children == 0) |
| 2468 | { |
| 2469 | index_type = dwarf2_fundamental_type (objfile, FT_INTEGER); |
| 2470 | range_type = create_range_type (NULL, index_type, 0, -1); |
| 2471 | die->type = create_array_type (NULL, element_type, range_type); |
| 2472 | return; |
| 2473 | } |
| 2474 | |
| 2475 | back_to = make_cleanup (null_cleanup, NULL); |
| 2476 | child_die = die->next; |
| 2477 | while (child_die && child_die->tag) |
| 2478 | { |
| 2479 | if (child_die->tag == DW_TAG_subrange_type) |
| 2480 | { |
| 2481 | unsigned int low, high; |
| 2482 | |
| 2483 | /* Default bounds to an array with unspecified length. */ |
| 2484 | low = 0; |
| 2485 | high = -1; |
| 2486 | if (cu_language == language_fortran) |
| 2487 | { |
| 2488 | /* FORTRAN implies a lower bound of 1, if not given. */ |
| 2489 | low = 1; |
| 2490 | } |
| 2491 | |
| 2492 | index_type = die_type (child_die, objfile, cu_header); |
| 2493 | attr = dwarf_attr (child_die, DW_AT_lower_bound); |
| 2494 | if (attr) |
| 2495 | { |
| 2496 | if (attr->form == DW_FORM_sdata) |
| 2497 | { |
| 2498 | low = DW_SND (attr); |
| 2499 | } |
| 2500 | else if (attr->form == DW_FORM_udata |
| 2501 | || attr->form == DW_FORM_data1 |
| 2502 | || attr->form == DW_FORM_data2 |
| 2503 | || attr->form == DW_FORM_data4) |
| 2504 | { |
| 2505 | low = DW_UNSND (attr); |
| 2506 | } |
| 2507 | else |
| 2508 | { |
| 2509 | complain (&dwarf2_non_const_array_bound_ignored, |
| 2510 | dwarf_form_name (attr->form)); |
| 2511 | #ifdef FORTRAN_HACK |
| 2512 | die->type = lookup_pointer_type (element_type); |
| 2513 | return; |
| 2514 | #else |
| 2515 | low = 0; |
| 2516 | #endif |
| 2517 | } |
| 2518 | } |
| 2519 | attr = dwarf_attr (child_die, DW_AT_upper_bound); |
| 2520 | if (attr) |
| 2521 | { |
| 2522 | if (attr->form == DW_FORM_sdata) |
| 2523 | { |
| 2524 | high = DW_SND (attr); |
| 2525 | } |
| 2526 | else if (attr->form == DW_FORM_udata |
| 2527 | || attr->form == DW_FORM_data1 |
| 2528 | || attr->form == DW_FORM_data2 |
| 2529 | || attr->form == DW_FORM_data4) |
| 2530 | { |
| 2531 | high = DW_UNSND (attr); |
| 2532 | } |
| 2533 | else if (attr->form == DW_FORM_block1) |
| 2534 | { |
| 2535 | /* GCC encodes arrays with unspecified or dynamic length |
| 2536 | with a DW_FORM_block1 attribute. |
| 2537 | FIXME: GDB does not yet know how to handle dynamic |
| 2538 | arrays properly, treat them as arrays with unspecified |
| 2539 | length for now. */ |
| 2540 | high = -1; |
| 2541 | } |
| 2542 | else |
| 2543 | { |
| 2544 | complain (&dwarf2_non_const_array_bound_ignored, |
| 2545 | dwarf_form_name (attr->form)); |
| 2546 | #ifdef FORTRAN_HACK |
| 2547 | die->type = lookup_pointer_type (element_type); |
| 2548 | return; |
| 2549 | #else |
| 2550 | high = 1; |
| 2551 | #endif |
| 2552 | } |
| 2553 | } |
| 2554 | |
| 2555 | /* Create a range type and save it for array type creation. */ |
| 2556 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
| 2557 | { |
| 2558 | range_types = (struct type **) |
| 2559 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) |
| 2560 | * sizeof (struct type *)); |
| 2561 | if (ndim == 0) |
| 2562 | make_cleanup (free_current_contents, &range_types); |
| 2563 | } |
| 2564 | range_types[ndim++] = create_range_type (NULL, index_type, low, high); |
| 2565 | } |
| 2566 | child_die = sibling_die (child_die); |
| 2567 | } |
| 2568 | |
| 2569 | /* Dwarf2 dimensions are output from left to right, create the |
| 2570 | necessary array types in backwards order. */ |
| 2571 | type = element_type; |
| 2572 | while (ndim-- > 0) |
| 2573 | type = create_array_type (NULL, type, range_types[ndim]); |
| 2574 | |
| 2575 | do_cleanups (back_to); |
| 2576 | |
| 2577 | /* Install the type in the die. */ |
| 2578 | die->type = type; |
| 2579 | } |
| 2580 | |
| 2581 | /* First cut: install each common block member as a global variable. */ |
| 2582 | |
| 2583 | static void |
| 2584 | read_common_block (struct die_info *die, struct objfile *objfile, |
| 2585 | const struct comp_unit_head *cu_header) |
| 2586 | { |
| 2587 | struct die_info *child_die; |
| 2588 | struct attribute *attr; |
| 2589 | struct symbol *sym; |
| 2590 | CORE_ADDR base = (CORE_ADDR) 0; |
| 2591 | |
| 2592 | attr = dwarf_attr (die, DW_AT_location); |
| 2593 | if (attr) |
| 2594 | { |
| 2595 | base = decode_locdesc (DW_BLOCK (attr), objfile, cu_header); |
| 2596 | } |
| 2597 | if (die->has_children) |
| 2598 | { |
| 2599 | child_die = die->next; |
| 2600 | while (child_die && child_die->tag) |
| 2601 | { |
| 2602 | sym = new_symbol (child_die, NULL, objfile, cu_header); |
| 2603 | attr = dwarf_attr (child_die, DW_AT_data_member_location); |
| 2604 | if (attr) |
| 2605 | { |
| 2606 | SYMBOL_VALUE_ADDRESS (sym) = |
| 2607 | base + decode_locdesc (DW_BLOCK (attr), objfile, cu_header); |
| 2608 | add_symbol_to_list (sym, &global_symbols); |
| 2609 | } |
| 2610 | child_die = sibling_die (child_die); |
| 2611 | } |
| 2612 | } |
| 2613 | } |
| 2614 | |
| 2615 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
| 2616 | the user defined type vector. */ |
| 2617 | |
| 2618 | static void |
| 2619 | read_tag_pointer_type (struct die_info *die, struct objfile *objfile, |
| 2620 | const struct comp_unit_head *cu_header) |
| 2621 | { |
| 2622 | struct type *type; |
| 2623 | struct attribute *attr; |
| 2624 | |
| 2625 | if (die->type) |
| 2626 | { |
| 2627 | return; |
| 2628 | } |
| 2629 | |
| 2630 | type = lookup_pointer_type (die_type (die, objfile, cu_header)); |
| 2631 | attr = dwarf_attr (die, DW_AT_byte_size); |
| 2632 | if (attr) |
| 2633 | { |
| 2634 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 2635 | } |
| 2636 | else |
| 2637 | { |
| 2638 | TYPE_LENGTH (type) = cu_header->addr_size; |
| 2639 | } |
| 2640 | die->type = type; |
| 2641 | } |
| 2642 | |
| 2643 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to |
| 2644 | the user defined type vector. */ |
| 2645 | |
| 2646 | static void |
| 2647 | read_tag_ptr_to_member_type (struct die_info *die, struct objfile *objfile, |
| 2648 | const struct comp_unit_head *cu_header) |
| 2649 | { |
| 2650 | struct type *type; |
| 2651 | struct type *to_type; |
| 2652 | struct type *domain; |
| 2653 | |
| 2654 | if (die->type) |
| 2655 | { |
| 2656 | return; |
| 2657 | } |
| 2658 | |
| 2659 | type = alloc_type (objfile); |
| 2660 | to_type = die_type (die, objfile, cu_header); |
| 2661 | domain = die_containing_type (die, objfile, cu_header); |
| 2662 | smash_to_member_type (type, domain, to_type); |
| 2663 | |
| 2664 | die->type = type; |
| 2665 | } |
| 2666 | |
| 2667 | /* Extract all information from a DW_TAG_reference_type DIE and add to |
| 2668 | the user defined type vector. */ |
| 2669 | |
| 2670 | static void |
| 2671 | read_tag_reference_type (struct die_info *die, struct objfile *objfile, |
| 2672 | const struct comp_unit_head *cu_header) |
| 2673 | { |
| 2674 | struct type *type; |
| 2675 | struct attribute *attr; |
| 2676 | |
| 2677 | if (die->type) |
| 2678 | { |
| 2679 | return; |
| 2680 | } |
| 2681 | |
| 2682 | type = lookup_reference_type (die_type (die, objfile, cu_header)); |
| 2683 | attr = dwarf_attr (die, DW_AT_byte_size); |
| 2684 | if (attr) |
| 2685 | { |
| 2686 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 2687 | } |
| 2688 | else |
| 2689 | { |
| 2690 | TYPE_LENGTH (type) = cu_header->addr_size; |
| 2691 | } |
| 2692 | die->type = type; |
| 2693 | } |
| 2694 | |
| 2695 | static void |
| 2696 | read_tag_const_type (struct die_info *die, struct objfile *objfile, |
| 2697 | const struct comp_unit_head *cu_header) |
| 2698 | { |
| 2699 | struct type *base_type; |
| 2700 | |
| 2701 | if (die->type) |
| 2702 | { |
| 2703 | return; |
| 2704 | } |
| 2705 | |
| 2706 | base_type = die_type (die, objfile, cu_header); |
| 2707 | die->type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
| 2708 | } |
| 2709 | |
| 2710 | static void |
| 2711 | read_tag_volatile_type (struct die_info *die, struct objfile *objfile, |
| 2712 | const struct comp_unit_head *cu_header) |
| 2713 | { |
| 2714 | struct type *base_type; |
| 2715 | |
| 2716 | if (die->type) |
| 2717 | { |
| 2718 | return; |
| 2719 | } |
| 2720 | |
| 2721 | base_type = die_type (die, objfile, cu_header); |
| 2722 | die->type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
| 2723 | } |
| 2724 | |
| 2725 | /* Extract all information from a DW_TAG_string_type DIE and add to |
| 2726 | the user defined type vector. It isn't really a user defined type, |
| 2727 | but it behaves like one, with other DIE's using an AT_user_def_type |
| 2728 | attribute to reference it. */ |
| 2729 | |
| 2730 | static void |
| 2731 | read_tag_string_type (struct die_info *die, struct objfile *objfile) |
| 2732 | { |
| 2733 | struct type *type, *range_type, *index_type, *char_type; |
| 2734 | struct attribute *attr; |
| 2735 | unsigned int length; |
| 2736 | |
| 2737 | if (die->type) |
| 2738 | { |
| 2739 | return; |
| 2740 | } |
| 2741 | |
| 2742 | attr = dwarf_attr (die, DW_AT_string_length); |
| 2743 | if (attr) |
| 2744 | { |
| 2745 | length = DW_UNSND (attr); |
| 2746 | } |
| 2747 | else |
| 2748 | { |
| 2749 | length = 1; |
| 2750 | } |
| 2751 | index_type = dwarf2_fundamental_type (objfile, FT_INTEGER); |
| 2752 | range_type = create_range_type (NULL, index_type, 1, length); |
| 2753 | char_type = dwarf2_fundamental_type (objfile, FT_CHAR); |
| 2754 | type = create_string_type (char_type, range_type); |
| 2755 | die->type = type; |
| 2756 | } |
| 2757 | |
| 2758 | /* Handle DIES due to C code like: |
| 2759 | |
| 2760 | struct foo |
| 2761 | { |
| 2762 | int (*funcp)(int a, long l); |
| 2763 | int b; |
| 2764 | }; |
| 2765 | |
| 2766 | ('funcp' generates a DW_TAG_subroutine_type DIE) |
| 2767 | */ |
| 2768 | |
| 2769 | static void |
| 2770 | read_subroutine_type (struct die_info *die, struct objfile *objfile, |
| 2771 | const struct comp_unit_head *cu_header) |
| 2772 | { |
| 2773 | struct type *type; /* Type that this function returns */ |
| 2774 | struct type *ftype; /* Function that returns above type */ |
| 2775 | struct attribute *attr; |
| 2776 | |
| 2777 | /* Decode the type that this subroutine returns */ |
| 2778 | if (die->type) |
| 2779 | { |
| 2780 | return; |
| 2781 | } |
| 2782 | type = die_type (die, objfile, cu_header); |
| 2783 | ftype = lookup_function_type (type); |
| 2784 | |
| 2785 | /* All functions in C++ have prototypes. */ |
| 2786 | attr = dwarf_attr (die, DW_AT_prototyped); |
| 2787 | if ((attr && (DW_UNSND (attr) != 0)) |
| 2788 | || cu_language == language_cplus) |
| 2789 | TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED; |
| 2790 | |
| 2791 | if (die->has_children) |
| 2792 | { |
| 2793 | struct die_info *child_die; |
| 2794 | int nparams = 0; |
| 2795 | int iparams = 0; |
| 2796 | |
| 2797 | /* Count the number of parameters. |
| 2798 | FIXME: GDB currently ignores vararg functions, but knows about |
| 2799 | vararg member functions. */ |
| 2800 | child_die = die->next; |
| 2801 | while (child_die && child_die->tag) |
| 2802 | { |
| 2803 | if (child_die->tag == DW_TAG_formal_parameter) |
| 2804 | nparams++; |
| 2805 | else if (child_die->tag == DW_TAG_unspecified_parameters) |
| 2806 | TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS; |
| 2807 | child_die = sibling_die (child_die); |
| 2808 | } |
| 2809 | |
| 2810 | /* Allocate storage for parameters and fill them in. */ |
| 2811 | TYPE_NFIELDS (ftype) = nparams; |
| 2812 | TYPE_FIELDS (ftype) = (struct field *) |
| 2813 | TYPE_ALLOC (ftype, nparams * sizeof (struct field)); |
| 2814 | |
| 2815 | child_die = die->next; |
| 2816 | while (child_die && child_die->tag) |
| 2817 | { |
| 2818 | if (child_die->tag == DW_TAG_formal_parameter) |
| 2819 | { |
| 2820 | /* Dwarf2 has no clean way to discern C++ static and non-static |
| 2821 | member functions. G++ helps GDB by marking the first |
| 2822 | parameter for non-static member functions (which is the |
| 2823 | this pointer) as artificial. We pass this information |
| 2824 | to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */ |
| 2825 | attr = dwarf_attr (child_die, DW_AT_artificial); |
| 2826 | if (attr) |
| 2827 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); |
| 2828 | else |
| 2829 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
| 2830 | TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, objfile, |
| 2831 | cu_header); |
| 2832 | iparams++; |
| 2833 | } |
| 2834 | child_die = sibling_die (child_die); |
| 2835 | } |
| 2836 | } |
| 2837 | |
| 2838 | die->type = ftype; |
| 2839 | } |
| 2840 | |
| 2841 | static void |
| 2842 | read_typedef (struct die_info *die, struct objfile *objfile, |
| 2843 | const struct comp_unit_head *cu_header) |
| 2844 | { |
| 2845 | struct type *type; |
| 2846 | |
| 2847 | if (!die->type) |
| 2848 | { |
| 2849 | struct attribute *attr; |
| 2850 | struct type *xtype; |
| 2851 | |
| 2852 | xtype = die_type (die, objfile, cu_header); |
| 2853 | |
| 2854 | type = alloc_type (objfile); |
| 2855 | TYPE_CODE (type) = TYPE_CODE_TYPEDEF; |
| 2856 | TYPE_FLAGS (type) |= TYPE_FLAG_TARGET_STUB; |
| 2857 | TYPE_TARGET_TYPE (type) = xtype; |
| 2858 | attr = dwarf_attr (die, DW_AT_name); |
| 2859 | if (attr && DW_STRING (attr)) |
| 2860 | TYPE_NAME (type) = obsavestring (DW_STRING (attr), |
| 2861 | strlen (DW_STRING (attr)), |
| 2862 | &objfile->type_obstack); |
| 2863 | |
| 2864 | die->type = type; |
| 2865 | } |
| 2866 | } |
| 2867 | |
| 2868 | /* Find a representation of a given base type and install |
| 2869 | it in the TYPE field of the die. */ |
| 2870 | |
| 2871 | static void |
| 2872 | read_base_type (struct die_info *die, struct objfile *objfile) |
| 2873 | { |
| 2874 | struct type *type; |
| 2875 | struct attribute *attr; |
| 2876 | int encoding = 0, size = 0; |
| 2877 | |
| 2878 | /* If we've already decoded this die, this is a no-op. */ |
| 2879 | if (die->type) |
| 2880 | { |
| 2881 | return; |
| 2882 | } |
| 2883 | |
| 2884 | attr = dwarf_attr (die, DW_AT_encoding); |
| 2885 | if (attr) |
| 2886 | { |
| 2887 | encoding = DW_UNSND (attr); |
| 2888 | } |
| 2889 | attr = dwarf_attr (die, DW_AT_byte_size); |
| 2890 | if (attr) |
| 2891 | { |
| 2892 | size = DW_UNSND (attr); |
| 2893 | } |
| 2894 | attr = dwarf_attr (die, DW_AT_name); |
| 2895 | if (attr && DW_STRING (attr)) |
| 2896 | { |
| 2897 | enum type_code code = TYPE_CODE_INT; |
| 2898 | int is_unsigned = 0; |
| 2899 | |
| 2900 | switch (encoding) |
| 2901 | { |
| 2902 | case DW_ATE_address: |
| 2903 | /* Turn DW_ATE_address into a void * pointer. */ |
| 2904 | code = TYPE_CODE_PTR; |
| 2905 | is_unsigned = 1; |
| 2906 | break; |
| 2907 | case DW_ATE_boolean: |
| 2908 | code = TYPE_CODE_BOOL; |
| 2909 | is_unsigned = 1; |
| 2910 | break; |
| 2911 | case DW_ATE_complex_float: |
| 2912 | code = TYPE_CODE_COMPLEX; |
| 2913 | break; |
| 2914 | case DW_ATE_float: |
| 2915 | code = TYPE_CODE_FLT; |
| 2916 | break; |
| 2917 | case DW_ATE_signed: |
| 2918 | case DW_ATE_signed_char: |
| 2919 | break; |
| 2920 | case DW_ATE_unsigned: |
| 2921 | case DW_ATE_unsigned_char: |
| 2922 | is_unsigned = 1; |
| 2923 | break; |
| 2924 | default: |
| 2925 | complain (&dwarf2_unsupported_at_encoding, |
| 2926 | dwarf_type_encoding_name (encoding)); |
| 2927 | break; |
| 2928 | } |
| 2929 | type = init_type (code, size, is_unsigned, DW_STRING (attr), objfile); |
| 2930 | if (encoding == DW_ATE_address) |
| 2931 | TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID); |
| 2932 | } |
| 2933 | else |
| 2934 | { |
| 2935 | type = dwarf_base_type (encoding, size, objfile); |
| 2936 | } |
| 2937 | die->type = type; |
| 2938 | } |
| 2939 | |
| 2940 | /* Read a whole compilation unit into a linked list of dies. */ |
| 2941 | |
| 2942 | static struct die_info * |
| 2943 | read_comp_unit (char *info_ptr, bfd *abfd, |
| 2944 | const struct comp_unit_head *cu_header) |
| 2945 | { |
| 2946 | struct die_info *first_die, *last_die, *die; |
| 2947 | char *cur_ptr; |
| 2948 | int nesting_level; |
| 2949 | |
| 2950 | /* Reset die reference table; we are |
| 2951 | building new ones now. */ |
| 2952 | dwarf2_empty_hash_tables (); |
| 2953 | |
| 2954 | cur_ptr = info_ptr; |
| 2955 | nesting_level = 0; |
| 2956 | first_die = last_die = NULL; |
| 2957 | do |
| 2958 | { |
| 2959 | cur_ptr = read_full_die (&die, abfd, cur_ptr, cu_header); |
| 2960 | if (die->has_children) |
| 2961 | { |
| 2962 | nesting_level++; |
| 2963 | } |
| 2964 | if (die->tag == 0) |
| 2965 | { |
| 2966 | nesting_level--; |
| 2967 | } |
| 2968 | |
| 2969 | die->next = NULL; |
| 2970 | |
| 2971 | /* Enter die in reference hash table */ |
| 2972 | store_in_ref_table (die->offset, die); |
| 2973 | |
| 2974 | if (!first_die) |
| 2975 | { |
| 2976 | first_die = last_die = die; |
| 2977 | } |
| 2978 | else |
| 2979 | { |
| 2980 | last_die->next = die; |
| 2981 | last_die = die; |
| 2982 | } |
| 2983 | } |
| 2984 | while (nesting_level > 0); |
| 2985 | return first_die; |
| 2986 | } |
| 2987 | |
| 2988 | /* Free a linked list of dies. */ |
| 2989 | |
| 2990 | static void |
| 2991 | free_die_list (struct die_info *dies) |
| 2992 | { |
| 2993 | struct die_info *die, *next; |
| 2994 | |
| 2995 | die = dies; |
| 2996 | while (die) |
| 2997 | { |
| 2998 | next = die->next; |
| 2999 | xfree (die->attrs); |
| 3000 | xfree (die); |
| 3001 | die = next; |
| 3002 | } |
| 3003 | } |
| 3004 | |
| 3005 | static void |
| 3006 | do_free_die_list_cleanup (void *dies) |
| 3007 | { |
| 3008 | free_die_list (dies); |
| 3009 | } |
| 3010 | |
| 3011 | static struct cleanup * |
| 3012 | make_cleanup_free_die_list (struct die_info *dies) |
| 3013 | { |
| 3014 | return make_cleanup (do_free_die_list_cleanup, dies); |
| 3015 | } |
| 3016 | |
| 3017 | |
| 3018 | /* Read the contents of the section at OFFSET and of size SIZE from the |
| 3019 | object file specified by OBJFILE into the psymbol_obstack and return it. */ |
| 3020 | |
| 3021 | static char * |
| 3022 | dwarf2_read_section (struct objfile *objfile, file_ptr offset, |
| 3023 | unsigned int size) |
| 3024 | { |
| 3025 | bfd *abfd = objfile->obfd; |
| 3026 | char *buf; |
| 3027 | |
| 3028 | if (size == 0) |
| 3029 | return NULL; |
| 3030 | |
| 3031 | buf = (char *) obstack_alloc (&objfile->psymbol_obstack, size); |
| 3032 | if ((bfd_seek (abfd, offset, SEEK_SET) != 0) || |
| 3033 | (bfd_read (buf, size, 1, abfd) != size)) |
| 3034 | { |
| 3035 | buf = NULL; |
| 3036 | error ("Dwarf Error: Can't read DWARF data from '%s'", |
| 3037 | bfd_get_filename (abfd)); |
| 3038 | } |
| 3039 | return buf; |
| 3040 | } |
| 3041 | |
| 3042 | /* In DWARF version 2, the description of the debugging information is |
| 3043 | stored in a separate .debug_abbrev section. Before we read any |
| 3044 | dies from a section we read in all abbreviations and install them |
| 3045 | in a hash table. */ |
| 3046 | |
| 3047 | static void |
| 3048 | dwarf2_read_abbrevs (bfd *abfd, unsigned int offset) |
| 3049 | { |
| 3050 | char *abbrev_ptr; |
| 3051 | struct abbrev_info *cur_abbrev; |
| 3052 | unsigned int abbrev_number, bytes_read, abbrev_name; |
| 3053 | unsigned int abbrev_form, hash_number; |
| 3054 | |
| 3055 | /* empty the table */ |
| 3056 | dwarf2_empty_abbrev_table (NULL); |
| 3057 | |
| 3058 | abbrev_ptr = dwarf_abbrev_buffer + offset; |
| 3059 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3060 | abbrev_ptr += bytes_read; |
| 3061 | |
| 3062 | /* loop until we reach an abbrev number of 0 */ |
| 3063 | while (abbrev_number) |
| 3064 | { |
| 3065 | cur_abbrev = dwarf_alloc_abbrev (); |
| 3066 | |
| 3067 | /* read in abbrev header */ |
| 3068 | cur_abbrev->number = abbrev_number; |
| 3069 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3070 | abbrev_ptr += bytes_read; |
| 3071 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); |
| 3072 | abbrev_ptr += 1; |
| 3073 | |
| 3074 | /* now read in declarations */ |
| 3075 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3076 | abbrev_ptr += bytes_read; |
| 3077 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3078 | abbrev_ptr += bytes_read; |
| 3079 | while (abbrev_name) |
| 3080 | { |
| 3081 | if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0) |
| 3082 | { |
| 3083 | cur_abbrev->attrs = (struct attr_abbrev *) |
| 3084 | xrealloc (cur_abbrev->attrs, |
| 3085 | (cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK) |
| 3086 | * sizeof (struct attr_abbrev)); |
| 3087 | } |
| 3088 | cur_abbrev->attrs[cur_abbrev->num_attrs].name = abbrev_name; |
| 3089 | cur_abbrev->attrs[cur_abbrev->num_attrs++].form = abbrev_form; |
| 3090 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3091 | abbrev_ptr += bytes_read; |
| 3092 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3093 | abbrev_ptr += bytes_read; |
| 3094 | } |
| 3095 | |
| 3096 | hash_number = abbrev_number % ABBREV_HASH_SIZE; |
| 3097 | cur_abbrev->next = dwarf2_abbrevs[hash_number]; |
| 3098 | dwarf2_abbrevs[hash_number] = cur_abbrev; |
| 3099 | |
| 3100 | /* Get next abbreviation. |
| 3101 | Under Irix6 the abbreviations for a compilation unit are not |
| 3102 | always properly terminated with an abbrev number of 0. |
| 3103 | Exit loop if we encounter an abbreviation which we have |
| 3104 | already read (which means we are about to read the abbreviations |
| 3105 | for the next compile unit) or if the end of the abbreviation |
| 3106 | table is reached. */ |
| 3107 | if ((unsigned int) (abbrev_ptr - dwarf_abbrev_buffer) |
| 3108 | >= dwarf_abbrev_size) |
| 3109 | break; |
| 3110 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 3111 | abbrev_ptr += bytes_read; |
| 3112 | if (dwarf2_lookup_abbrev (abbrev_number) != NULL) |
| 3113 | break; |
| 3114 | } |
| 3115 | } |
| 3116 | |
| 3117 | /* Empty the abbrev table for a new compilation unit. */ |
| 3118 | |
| 3119 | /* ARGSUSED */ |
| 3120 | static void |
| 3121 | dwarf2_empty_abbrev_table (PTR ignore) |
| 3122 | { |
| 3123 | int i; |
| 3124 | struct abbrev_info *abbrev, *next; |
| 3125 | |
| 3126 | for (i = 0; i < ABBREV_HASH_SIZE; ++i) |
| 3127 | { |
| 3128 | next = NULL; |
| 3129 | abbrev = dwarf2_abbrevs[i]; |
| 3130 | while (abbrev) |
| 3131 | { |
| 3132 | next = abbrev->next; |
| 3133 | xfree (abbrev->attrs); |
| 3134 | xfree (abbrev); |
| 3135 | abbrev = next; |
| 3136 | } |
| 3137 | dwarf2_abbrevs[i] = NULL; |
| 3138 | } |
| 3139 | } |
| 3140 | |
| 3141 | /* Lookup an abbrev_info structure in the abbrev hash table. */ |
| 3142 | |
| 3143 | static struct abbrev_info * |
| 3144 | dwarf2_lookup_abbrev (unsigned int number) |
| 3145 | { |
| 3146 | unsigned int hash_number; |
| 3147 | struct abbrev_info *abbrev; |
| 3148 | |
| 3149 | hash_number = number % ABBREV_HASH_SIZE; |
| 3150 | abbrev = dwarf2_abbrevs[hash_number]; |
| 3151 | |
| 3152 | while (abbrev) |
| 3153 | { |
| 3154 | if (abbrev->number == number) |
| 3155 | return abbrev; |
| 3156 | else |
| 3157 | abbrev = abbrev->next; |
| 3158 | } |
| 3159 | return NULL; |
| 3160 | } |
| 3161 | |
| 3162 | /* Read a minimal amount of information into the minimal die structure. */ |
| 3163 | |
| 3164 | static char * |
| 3165 | read_partial_die (struct partial_die_info *part_die, bfd *abfd, |
| 3166 | char *info_ptr, const struct comp_unit_head *cu_header) |
| 3167 | { |
| 3168 | unsigned int abbrev_number, bytes_read, i; |
| 3169 | struct abbrev_info *abbrev; |
| 3170 | struct attribute attr; |
| 3171 | struct attribute spec_attr; |
| 3172 | int found_spec_attr = 0; |
| 3173 | int has_low_pc_attr = 0; |
| 3174 | int has_high_pc_attr = 0; |
| 3175 | |
| 3176 | *part_die = zeroed_partial_die; |
| 3177 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 3178 | info_ptr += bytes_read; |
| 3179 | if (!abbrev_number) |
| 3180 | return info_ptr; |
| 3181 | |
| 3182 | abbrev = dwarf2_lookup_abbrev (abbrev_number); |
| 3183 | if (!abbrev) |
| 3184 | { |
| 3185 | error ("Dwarf Error: Could not find abbrev number %d.", abbrev_number); |
| 3186 | } |
| 3187 | part_die->offset = info_ptr - dwarf_info_buffer; |
| 3188 | part_die->tag = abbrev->tag; |
| 3189 | part_die->has_children = abbrev->has_children; |
| 3190 | part_die->abbrev = abbrev_number; |
| 3191 | |
| 3192 | for (i = 0; i < abbrev->num_attrs; ++i) |
| 3193 | { |
| 3194 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, |
| 3195 | info_ptr, cu_header); |
| 3196 | |
| 3197 | /* Store the data if it is of an attribute we want to keep in a |
| 3198 | partial symbol table. */ |
| 3199 | switch (attr.name) |
| 3200 | { |
| 3201 | case DW_AT_name: |
| 3202 | |
| 3203 | /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */ |
| 3204 | if (part_die->name == NULL) |
| 3205 | part_die->name = DW_STRING (&attr); |
| 3206 | break; |
| 3207 | case DW_AT_MIPS_linkage_name: |
| 3208 | part_die->name = DW_STRING (&attr); |
| 3209 | break; |
| 3210 | case DW_AT_low_pc: |
| 3211 | has_low_pc_attr = 1; |
| 3212 | part_die->lowpc = DW_ADDR (&attr); |
| 3213 | break; |
| 3214 | case DW_AT_high_pc: |
| 3215 | has_high_pc_attr = 1; |
| 3216 | part_die->highpc = DW_ADDR (&attr); |
| 3217 | break; |
| 3218 | case DW_AT_location: |
| 3219 | part_die->locdesc = DW_BLOCK (&attr); |
| 3220 | break; |
| 3221 | case DW_AT_language: |
| 3222 | part_die->language = DW_UNSND (&attr); |
| 3223 | break; |
| 3224 | case DW_AT_external: |
| 3225 | part_die->is_external = DW_UNSND (&attr); |
| 3226 | break; |
| 3227 | case DW_AT_declaration: |
| 3228 | part_die->is_declaration = DW_UNSND (&attr); |
| 3229 | break; |
| 3230 | case DW_AT_type: |
| 3231 | part_die->has_type = 1; |
| 3232 | break; |
| 3233 | case DW_AT_abstract_origin: |
| 3234 | case DW_AT_specification: |
| 3235 | found_spec_attr = 1; |
| 3236 | spec_attr = attr; |
| 3237 | break; |
| 3238 | case DW_AT_sibling: |
| 3239 | /* Ignore absolute siblings, they might point outside of |
| 3240 | the current compile unit. */ |
| 3241 | if (attr.form == DW_FORM_ref_addr) |
| 3242 | complain (&dwarf2_absolute_sibling_complaint); |
| 3243 | else |
| 3244 | part_die->sibling = |
| 3245 | dwarf_info_buffer + dwarf2_get_ref_die_offset (&attr); |
| 3246 | break; |
| 3247 | default: |
| 3248 | break; |
| 3249 | } |
| 3250 | } |
| 3251 | |
| 3252 | /* If we found a reference attribute and the die has no name, try |
| 3253 | to find a name in the referred to die. */ |
| 3254 | |
| 3255 | if (found_spec_attr && part_die->name == NULL) |
| 3256 | { |
| 3257 | struct partial_die_info spec_die; |
| 3258 | char *spec_ptr; |
| 3259 | int dummy; |
| 3260 | |
| 3261 | spec_ptr = dwarf_info_buffer + dwarf2_get_ref_die_offset (&spec_attr); |
| 3262 | read_partial_die (&spec_die, abfd, spec_ptr, cu_header); |
| 3263 | if (spec_die.name) |
| 3264 | { |
| 3265 | part_die->name = spec_die.name; |
| 3266 | |
| 3267 | /* Copy DW_AT_external attribute if it is set. */ |
| 3268 | if (spec_die.is_external) |
| 3269 | part_die->is_external = spec_die.is_external; |
| 3270 | } |
| 3271 | } |
| 3272 | |
| 3273 | /* When using the GNU linker, .gnu.linkonce. sections are used to |
| 3274 | eliminate duplicate copies of functions and vtables and such. |
| 3275 | The linker will arbitrarily choose one and discard the others. |
| 3276 | The AT_*_pc values for such functions refer to local labels in |
| 3277 | these sections. If the section from that file was discarded, the |
| 3278 | labels are not in the output, so the relocs get a value of 0. |
| 3279 | If this is a discarded function, mark the pc bounds as invalid, |
| 3280 | so that GDB will ignore it. */ |
| 3281 | if (has_low_pc_attr && has_high_pc_attr |
| 3282 | && part_die->lowpc < part_die->highpc |
| 3283 | && (part_die->lowpc != 0 |
| 3284 | || (bfd_get_file_flags (abfd) & HAS_RELOC))) |
| 3285 | part_die->has_pc_info = 1; |
| 3286 | return info_ptr; |
| 3287 | } |
| 3288 | |
| 3289 | /* Read the die from the .debug_info section buffer. And set diep to |
| 3290 | point to a newly allocated die with its information. */ |
| 3291 | |
| 3292 | static char * |
| 3293 | read_full_die (struct die_info **diep, bfd *abfd, char *info_ptr, |
| 3294 | const struct comp_unit_head *cu_header) |
| 3295 | { |
| 3296 | unsigned int abbrev_number, bytes_read, i, offset; |
| 3297 | struct abbrev_info *abbrev; |
| 3298 | struct die_info *die; |
| 3299 | |
| 3300 | offset = info_ptr - dwarf_info_buffer; |
| 3301 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 3302 | info_ptr += bytes_read; |
| 3303 | if (!abbrev_number) |
| 3304 | { |
| 3305 | die = dwarf_alloc_die (); |
| 3306 | die->tag = 0; |
| 3307 | die->abbrev = abbrev_number; |
| 3308 | die->type = NULL; |
| 3309 | *diep = die; |
| 3310 | return info_ptr; |
| 3311 | } |
| 3312 | |
| 3313 | abbrev = dwarf2_lookup_abbrev (abbrev_number); |
| 3314 | if (!abbrev) |
| 3315 | { |
| 3316 | error ("Dwarf Error: could not find abbrev number %d.", abbrev_number); |
| 3317 | } |
| 3318 | die = dwarf_alloc_die (); |
| 3319 | die->offset = offset; |
| 3320 | die->tag = abbrev->tag; |
| 3321 | die->has_children = abbrev->has_children; |
| 3322 | die->abbrev = abbrev_number; |
| 3323 | die->type = NULL; |
| 3324 | |
| 3325 | die->num_attrs = abbrev->num_attrs; |
| 3326 | die->attrs = (struct attribute *) |
| 3327 | xmalloc (die->num_attrs * sizeof (struct attribute)); |
| 3328 | |
| 3329 | for (i = 0; i < abbrev->num_attrs; ++i) |
| 3330 | { |
| 3331 | info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i], |
| 3332 | abfd, info_ptr, cu_header); |
| 3333 | } |
| 3334 | |
| 3335 | *diep = die; |
| 3336 | return info_ptr; |
| 3337 | } |
| 3338 | |
| 3339 | /* Read an attribute described by an abbreviated attribute. */ |
| 3340 | |
| 3341 | static char * |
| 3342 | read_attribute (struct attribute *attr, struct attr_abbrev *abbrev, |
| 3343 | bfd *abfd, char *info_ptr, |
| 3344 | const struct comp_unit_head *cu_header) |
| 3345 | { |
| 3346 | unsigned int bytes_read; |
| 3347 | struct dwarf_block *blk; |
| 3348 | |
| 3349 | attr->name = abbrev->name; |
| 3350 | attr->form = abbrev->form; |
| 3351 | switch (abbrev->form) |
| 3352 | { |
| 3353 | case DW_FORM_addr: |
| 3354 | case DW_FORM_ref_addr: |
| 3355 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu_header, &bytes_read); |
| 3356 | info_ptr += bytes_read; |
| 3357 | break; |
| 3358 | case DW_FORM_block2: |
| 3359 | blk = dwarf_alloc_block (); |
| 3360 | blk->size = read_2_bytes (abfd, info_ptr); |
| 3361 | info_ptr += 2; |
| 3362 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 3363 | info_ptr += blk->size; |
| 3364 | DW_BLOCK (attr) = blk; |
| 3365 | break; |
| 3366 | case DW_FORM_block4: |
| 3367 | blk = dwarf_alloc_block (); |
| 3368 | blk->size = read_4_bytes (abfd, info_ptr); |
| 3369 | info_ptr += 4; |
| 3370 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 3371 | info_ptr += blk->size; |
| 3372 | DW_BLOCK (attr) = blk; |
| 3373 | break; |
| 3374 | case DW_FORM_data2: |
| 3375 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); |
| 3376 | info_ptr += 2; |
| 3377 | break; |
| 3378 | case DW_FORM_data4: |
| 3379 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); |
| 3380 | info_ptr += 4; |
| 3381 | break; |
| 3382 | case DW_FORM_data8: |
| 3383 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); |
| 3384 | info_ptr += 8; |
| 3385 | break; |
| 3386 | case DW_FORM_string: |
| 3387 | DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read); |
| 3388 | info_ptr += bytes_read; |
| 3389 | break; |
| 3390 | case DW_FORM_block: |
| 3391 | blk = dwarf_alloc_block (); |
| 3392 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 3393 | info_ptr += bytes_read; |
| 3394 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 3395 | info_ptr += blk->size; |
| 3396 | DW_BLOCK (attr) = blk; |
| 3397 | break; |
| 3398 | case DW_FORM_block1: |
| 3399 | blk = dwarf_alloc_block (); |
| 3400 | blk->size = read_1_byte (abfd, info_ptr); |
| 3401 | info_ptr += 1; |
| 3402 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 3403 | info_ptr += blk->size; |
| 3404 | DW_BLOCK (attr) = blk; |
| 3405 | break; |
| 3406 | case DW_FORM_data1: |
| 3407 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); |
| 3408 | info_ptr += 1; |
| 3409 | break; |
| 3410 | case DW_FORM_flag: |
| 3411 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); |
| 3412 | info_ptr += 1; |
| 3413 | break; |
| 3414 | case DW_FORM_sdata: |
| 3415 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); |
| 3416 | info_ptr += bytes_read; |
| 3417 | break; |
| 3418 | case DW_FORM_udata: |
| 3419 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 3420 | info_ptr += bytes_read; |
| 3421 | break; |
| 3422 | case DW_FORM_ref1: |
| 3423 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); |
| 3424 | info_ptr += 1; |
| 3425 | break; |
| 3426 | case DW_FORM_ref2: |
| 3427 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); |
| 3428 | info_ptr += 2; |
| 3429 | break; |
| 3430 | case DW_FORM_ref4: |
| 3431 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); |
| 3432 | info_ptr += 4; |
| 3433 | break; |
| 3434 | case DW_FORM_ref8: |
| 3435 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); |
| 3436 | info_ptr += 8; |
| 3437 | break; |
| 3438 | case DW_FORM_ref_udata: |
| 3439 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 3440 | info_ptr += bytes_read; |
| 3441 | break; |
| 3442 | case DW_FORM_strp: |
| 3443 | case DW_FORM_indirect: |
| 3444 | default: |
| 3445 | error ("Dwarf Error: Cannot handle %s in DWARF reader.", |
| 3446 | dwarf_form_name (abbrev->form)); |
| 3447 | } |
| 3448 | return info_ptr; |
| 3449 | } |
| 3450 | |
| 3451 | /* read dwarf information from a buffer */ |
| 3452 | |
| 3453 | static unsigned int |
| 3454 | read_1_byte (bfd *abfd, char *buf) |
| 3455 | { |
| 3456 | return bfd_get_8 (abfd, (bfd_byte *) buf); |
| 3457 | } |
| 3458 | |
| 3459 | static int |
| 3460 | read_1_signed_byte (bfd *abfd, char *buf) |
| 3461 | { |
| 3462 | return bfd_get_signed_8 (abfd, (bfd_byte *) buf); |
| 3463 | } |
| 3464 | |
| 3465 | static unsigned int |
| 3466 | read_2_bytes (bfd *abfd, char *buf) |
| 3467 | { |
| 3468 | return bfd_get_16 (abfd, (bfd_byte *) buf); |
| 3469 | } |
| 3470 | |
| 3471 | static int |
| 3472 | read_2_signed_bytes (bfd *abfd, char *buf) |
| 3473 | { |
| 3474 | return bfd_get_signed_16 (abfd, (bfd_byte *) buf); |
| 3475 | } |
| 3476 | |
| 3477 | static unsigned int |
| 3478 | read_4_bytes (bfd *abfd, char *buf) |
| 3479 | { |
| 3480 | return bfd_get_32 (abfd, (bfd_byte *) buf); |
| 3481 | } |
| 3482 | |
| 3483 | static int |
| 3484 | read_4_signed_bytes (bfd *abfd, char *buf) |
| 3485 | { |
| 3486 | return bfd_get_signed_32 (abfd, (bfd_byte *) buf); |
| 3487 | } |
| 3488 | |
| 3489 | static unsigned long |
| 3490 | read_8_bytes (bfd *abfd, char *buf) |
| 3491 | { |
| 3492 | return bfd_get_64 (abfd, (bfd_byte *) buf); |
| 3493 | } |
| 3494 | |
| 3495 | static CORE_ADDR |
| 3496 | read_address (bfd *abfd, char *buf, const struct comp_unit_head *cu_header, |
| 3497 | int *bytes_read) |
| 3498 | { |
| 3499 | CORE_ADDR retval = 0; |
| 3500 | |
| 3501 | if (cu_header->signed_addr_p) |
| 3502 | { |
| 3503 | switch (cu_header->addr_size) |
| 3504 | { |
| 3505 | case 2: |
| 3506 | retval = bfd_get_signed_16 (abfd, (bfd_byte *) buf); |
| 3507 | break; |
| 3508 | case 4: |
| 3509 | retval = bfd_get_signed_32 (abfd, (bfd_byte *) buf); |
| 3510 | break; |
| 3511 | case 8: |
| 3512 | retval = bfd_get_signed_64 (abfd, (bfd_byte *) buf); |
| 3513 | break; |
| 3514 | default: |
| 3515 | internal_error (__FILE__, __LINE__, |
| 3516 | "read_address: bad switch, signed"); |
| 3517 | } |
| 3518 | } |
| 3519 | else |
| 3520 | { |
| 3521 | switch (cu_header->addr_size) |
| 3522 | { |
| 3523 | case 2: |
| 3524 | retval = bfd_get_16 (abfd, (bfd_byte *) buf); |
| 3525 | break; |
| 3526 | case 4: |
| 3527 | retval = bfd_get_32 (abfd, (bfd_byte *) buf); |
| 3528 | break; |
| 3529 | case 8: |
| 3530 | retval = bfd_get_64 (abfd, (bfd_byte *) buf); |
| 3531 | break; |
| 3532 | default: |
| 3533 | internal_error (__FILE__, __LINE__, |
| 3534 | "read_address: bad switch, unsigned"); |
| 3535 | } |
| 3536 | } |
| 3537 | |
| 3538 | *bytes_read = cu_header->addr_size; |
| 3539 | return retval; |
| 3540 | } |
| 3541 | |
| 3542 | /* Reads the initial length from a section. The (draft) DWARF 2.1 |
| 3543 | specification allows the initial length to take up either 4 bytes |
| 3544 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 |
| 3545 | bytes describe the length and all offsets will be 8 bytes in length |
| 3546 | instead of 4. |
| 3547 | |
| 3548 | The value returned via bytes_read should be used to increment |
| 3549 | the relevant pointer after calling read_initial_length(). |
| 3550 | |
| 3551 | As a side effect, this function sets the fields initial_length_size |
| 3552 | and offset_size in cu_header to the values appropriate for the |
| 3553 | length field. (The format of the initial length field determines |
| 3554 | the width of file offsets to be fetched later with fetch_offset().) |
| 3555 | |
| 3556 | [ Note: read_initial_length() and read_offset() are based on the |
| 3557 | document entitled "DWARF Debugging Information Format", revision |
| 3558 | 2.1, draft 4, dated July 20, 2000. This document was obtained |
| 3559 | from: |
| 3560 | |
| 3561 | http://reality.sgi.com/dehnert_engr/dwarf/dwarf2p1-draft4-000720.pdf |
| 3562 | |
| 3563 | This document is only a draft and is subject to change. (So beware.) |
| 3564 | |
| 3565 | - Kevin, Aug 4, 2000 |
| 3566 | ] */ |
| 3567 | |
| 3568 | static LONGEST |
| 3569 | read_initial_length (bfd *abfd, char *buf, struct comp_unit_head *cu_header, |
| 3570 | int *bytes_read) |
| 3571 | { |
| 3572 | LONGEST retval = 0; |
| 3573 | |
| 3574 | retval = bfd_get_32 (abfd, (bfd_byte *) buf); |
| 3575 | |
| 3576 | if (retval == 0xffffffff) |
| 3577 | { |
| 3578 | retval = bfd_get_64 (abfd, (bfd_byte *) buf + 4); |
| 3579 | *bytes_read = 12; |
| 3580 | if (cu_header != NULL) |
| 3581 | { |
| 3582 | cu_header->initial_length_size = 12; |
| 3583 | cu_header->offset_size = 8; |
| 3584 | } |
| 3585 | } |
| 3586 | else |
| 3587 | { |
| 3588 | *bytes_read = 4; |
| 3589 | if (cu_header != NULL) |
| 3590 | { |
| 3591 | cu_header->initial_length_size = 4; |
| 3592 | cu_header->offset_size = 4; |
| 3593 | } |
| 3594 | } |
| 3595 | |
| 3596 | return retval; |
| 3597 | } |
| 3598 | |
| 3599 | /* Read an offset from the data stream. The size of the offset is |
| 3600 | given by cu_header->offset_size. */ |
| 3601 | |
| 3602 | static LONGEST |
| 3603 | read_offset (bfd *abfd, char *buf, const struct comp_unit_head *cu_header, |
| 3604 | int *bytes_read) |
| 3605 | { |
| 3606 | LONGEST retval = 0; |
| 3607 | |
| 3608 | switch (cu_header->offset_size) |
| 3609 | { |
| 3610 | case 4: |
| 3611 | retval = bfd_get_32 (abfd, (bfd_byte *) buf); |
| 3612 | *bytes_read = 4; |
| 3613 | break; |
| 3614 | case 8: |
| 3615 | retval = bfd_get_64 (abfd, (bfd_byte *) buf); |
| 3616 | *bytes_read = 8; |
| 3617 | break; |
| 3618 | default: |
| 3619 | internal_error (__FILE__, __LINE__, |
| 3620 | "read_offset: bad switch"); |
| 3621 | } |
| 3622 | |
| 3623 | return retval; |
| 3624 | } |
| 3625 | |
| 3626 | static char * |
| 3627 | read_n_bytes (bfd *abfd, char *buf, unsigned int size) |
| 3628 | { |
| 3629 | /* If the size of a host char is 8 bits, we can return a pointer |
| 3630 | to the buffer, otherwise we have to copy the data to a buffer |
| 3631 | allocated on the temporary obstack. */ |
| 3632 | #if HOST_CHAR_BIT == 8 |
| 3633 | return buf; |
| 3634 | #else |
| 3635 | char *ret; |
| 3636 | unsigned int i; |
| 3637 | |
| 3638 | ret = obstack_alloc (&dwarf2_tmp_obstack, size); |
| 3639 | for (i = 0; i < size; ++i) |
| 3640 | { |
| 3641 | ret[i] = bfd_get_8 (abfd, (bfd_byte *) buf); |
| 3642 | buf++; |
| 3643 | } |
| 3644 | return ret; |
| 3645 | #endif |
| 3646 | } |
| 3647 | |
| 3648 | static char * |
| 3649 | read_string (bfd *abfd, char *buf, unsigned int *bytes_read_ptr) |
| 3650 | { |
| 3651 | /* If the size of a host char is 8 bits, we can return a pointer |
| 3652 | to the string, otherwise we have to copy the string to a buffer |
| 3653 | allocated on the temporary obstack. */ |
| 3654 | #if HOST_CHAR_BIT == 8 |
| 3655 | if (*buf == '\0') |
| 3656 | { |
| 3657 | *bytes_read_ptr = 1; |
| 3658 | return NULL; |
| 3659 | } |
| 3660 | *bytes_read_ptr = strlen (buf) + 1; |
| 3661 | return buf; |
| 3662 | #else |
| 3663 | int byte; |
| 3664 | unsigned int i = 0; |
| 3665 | |
| 3666 | while ((byte = bfd_get_8 (abfd, (bfd_byte *) buf)) != 0) |
| 3667 | { |
| 3668 | obstack_1grow (&dwarf2_tmp_obstack, byte); |
| 3669 | i++; |
| 3670 | buf++; |
| 3671 | } |
| 3672 | if (i == 0) |
| 3673 | { |
| 3674 | *bytes_read_ptr = 1; |
| 3675 | return NULL; |
| 3676 | } |
| 3677 | obstack_1grow (&dwarf2_tmp_obstack, '\0'); |
| 3678 | *bytes_read_ptr = i + 1; |
| 3679 | return obstack_finish (&dwarf2_tmp_obstack); |
| 3680 | #endif |
| 3681 | } |
| 3682 | |
| 3683 | static unsigned long |
| 3684 | read_unsigned_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr) |
| 3685 | { |
| 3686 | unsigned long result; |
| 3687 | unsigned int num_read; |
| 3688 | int i, shift; |
| 3689 | unsigned char byte; |
| 3690 | |
| 3691 | result = 0; |
| 3692 | shift = 0; |
| 3693 | num_read = 0; |
| 3694 | i = 0; |
| 3695 | while (1) |
| 3696 | { |
| 3697 | byte = bfd_get_8 (abfd, (bfd_byte *) buf); |
| 3698 | buf++; |
| 3699 | num_read++; |
| 3700 | result |= ((unsigned long)(byte & 127) << shift); |
| 3701 | if ((byte & 128) == 0) |
| 3702 | { |
| 3703 | break; |
| 3704 | } |
| 3705 | shift += 7; |
| 3706 | } |
| 3707 | *bytes_read_ptr = num_read; |
| 3708 | return result; |
| 3709 | } |
| 3710 | |
| 3711 | static long |
| 3712 | read_signed_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr) |
| 3713 | { |
| 3714 | long result; |
| 3715 | int i, shift, size, num_read; |
| 3716 | unsigned char byte; |
| 3717 | |
| 3718 | result = 0; |
| 3719 | shift = 0; |
| 3720 | size = 32; |
| 3721 | num_read = 0; |
| 3722 | i = 0; |
| 3723 | while (1) |
| 3724 | { |
| 3725 | byte = bfd_get_8 (abfd, (bfd_byte *) buf); |
| 3726 | buf++; |
| 3727 | num_read++; |
| 3728 | result |= ((long)(byte & 127) << shift); |
| 3729 | shift += 7; |
| 3730 | if ((byte & 128) == 0) |
| 3731 | { |
| 3732 | break; |
| 3733 | } |
| 3734 | } |
| 3735 | if ((shift < size) && (byte & 0x40)) |
| 3736 | { |
| 3737 | result |= -(1 << shift); |
| 3738 | } |
| 3739 | *bytes_read_ptr = num_read; |
| 3740 | return result; |
| 3741 | } |
| 3742 | |
| 3743 | static void |
| 3744 | set_cu_language (unsigned int lang) |
| 3745 | { |
| 3746 | switch (lang) |
| 3747 | { |
| 3748 | case DW_LANG_C89: |
| 3749 | case DW_LANG_C: |
| 3750 | cu_language = language_c; |
| 3751 | break; |
| 3752 | case DW_LANG_C_plus_plus: |
| 3753 | cu_language = language_cplus; |
| 3754 | break; |
| 3755 | case DW_LANG_Fortran77: |
| 3756 | case DW_LANG_Fortran90: |
| 3757 | cu_language = language_fortran; |
| 3758 | break; |
| 3759 | case DW_LANG_Mips_Assembler: |
| 3760 | cu_language = language_asm; |
| 3761 | break; |
| 3762 | case DW_LANG_Java: |
| 3763 | cu_language = language_java; |
| 3764 | break; |
| 3765 | case DW_LANG_Ada83: |
| 3766 | case DW_LANG_Cobol74: |
| 3767 | case DW_LANG_Cobol85: |
| 3768 | case DW_LANG_Pascal83: |
| 3769 | case DW_LANG_Modula2: |
| 3770 | default: |
| 3771 | cu_language = language_unknown; |
| 3772 | break; |
| 3773 | } |
| 3774 | cu_language_defn = language_def (cu_language); |
| 3775 | } |
| 3776 | |
| 3777 | /* Return the named attribute or NULL if not there. */ |
| 3778 | |
| 3779 | static struct attribute * |
| 3780 | dwarf_attr (struct die_info *die, unsigned int name) |
| 3781 | { |
| 3782 | unsigned int i; |
| 3783 | struct attribute *spec = NULL; |
| 3784 | |
| 3785 | for (i = 0; i < die->num_attrs; ++i) |
| 3786 | { |
| 3787 | if (die->attrs[i].name == name) |
| 3788 | { |
| 3789 | return &die->attrs[i]; |
| 3790 | } |
| 3791 | if (die->attrs[i].name == DW_AT_specification |
| 3792 | || die->attrs[i].name == DW_AT_abstract_origin) |
| 3793 | spec = &die->attrs[i]; |
| 3794 | } |
| 3795 | if (spec) |
| 3796 | { |
| 3797 | struct die_info *ref_die = |
| 3798 | follow_die_ref (dwarf2_get_ref_die_offset (spec)); |
| 3799 | |
| 3800 | if (ref_die) |
| 3801 | return dwarf_attr (ref_die, name); |
| 3802 | } |
| 3803 | |
| 3804 | return NULL; |
| 3805 | } |
| 3806 | |
| 3807 | static int |
| 3808 | die_is_declaration (struct die_info *die) |
| 3809 | { |
| 3810 | return (dwarf_attr (die, DW_AT_declaration) |
| 3811 | && ! dwarf_attr (die, DW_AT_specification)); |
| 3812 | } |
| 3813 | |
| 3814 | /* Decode the line number information for the compilation unit whose |
| 3815 | line number info is at OFFSET in the .debug_line section. |
| 3816 | The compilation directory of the file is passed in COMP_DIR. */ |
| 3817 | |
| 3818 | struct filenames |
| 3819 | { |
| 3820 | unsigned int num_files; |
| 3821 | struct fileinfo |
| 3822 | { |
| 3823 | char *name; |
| 3824 | unsigned int dir; |
| 3825 | unsigned int time; |
| 3826 | unsigned int size; |
| 3827 | } |
| 3828 | *files; |
| 3829 | }; |
| 3830 | |
| 3831 | struct directories |
| 3832 | { |
| 3833 | unsigned int num_dirs; |
| 3834 | char **dirs; |
| 3835 | }; |
| 3836 | |
| 3837 | static void |
| 3838 | dwarf_decode_lines (unsigned int offset, char *comp_dir, bfd *abfd, |
| 3839 | const struct comp_unit_head *cu_header) |
| 3840 | { |
| 3841 | char *line_ptr; |
| 3842 | char *line_end; |
| 3843 | struct line_head lh; |
| 3844 | struct cleanup *back_to; |
| 3845 | unsigned int i, bytes_read; |
| 3846 | char *cur_file, *cur_dir; |
| 3847 | unsigned char op_code, extended_op, adj_opcode; |
| 3848 | |
| 3849 | #define FILE_ALLOC_CHUNK 5 |
| 3850 | #define DIR_ALLOC_CHUNK 5 |
| 3851 | |
| 3852 | struct filenames files; |
| 3853 | struct directories dirs; |
| 3854 | |
| 3855 | if (dwarf_line_buffer == NULL) |
| 3856 | { |
| 3857 | complain (&dwarf2_missing_line_number_section); |
| 3858 | return; |
| 3859 | } |
| 3860 | |
| 3861 | files.num_files = 0; |
| 3862 | files.files = NULL; |
| 3863 | |
| 3864 | dirs.num_dirs = 0; |
| 3865 | dirs.dirs = NULL; |
| 3866 | |
| 3867 | line_ptr = dwarf_line_buffer + offset; |
| 3868 | |
| 3869 | /* read in the prologue */ |
| 3870 | lh.total_length = read_initial_length (abfd, line_ptr, NULL, &bytes_read); |
| 3871 | line_ptr += bytes_read; |
| 3872 | line_end = line_ptr + lh.total_length; |
| 3873 | lh.version = read_2_bytes (abfd, line_ptr); |
| 3874 | line_ptr += 2; |
| 3875 | lh.prologue_length = read_offset (abfd, line_ptr, cu_header, &bytes_read); |
| 3876 | line_ptr += bytes_read; |
| 3877 | lh.minimum_instruction_length = read_1_byte (abfd, line_ptr); |
| 3878 | line_ptr += 1; |
| 3879 | lh.default_is_stmt = read_1_byte (abfd, line_ptr); |
| 3880 | line_ptr += 1; |
| 3881 | lh.line_base = read_1_signed_byte (abfd, line_ptr); |
| 3882 | line_ptr += 1; |
| 3883 | lh.line_range = read_1_byte (abfd, line_ptr); |
| 3884 | line_ptr += 1; |
| 3885 | lh.opcode_base = read_1_byte (abfd, line_ptr); |
| 3886 | line_ptr += 1; |
| 3887 | lh.standard_opcode_lengths = (unsigned char *) |
| 3888 | xmalloc (lh.opcode_base * sizeof (unsigned char)); |
| 3889 | back_to = make_cleanup (free_current_contents, &lh.standard_opcode_lengths); |
| 3890 | |
| 3891 | lh.standard_opcode_lengths[0] = 1; |
| 3892 | for (i = 1; i < lh.opcode_base; ++i) |
| 3893 | { |
| 3894 | lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); |
| 3895 | line_ptr += 1; |
| 3896 | } |
| 3897 | |
| 3898 | /* Read directory table */ |
| 3899 | while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
| 3900 | { |
| 3901 | line_ptr += bytes_read; |
| 3902 | if ((dirs.num_dirs % DIR_ALLOC_CHUNK) == 0) |
| 3903 | { |
| 3904 | dirs.dirs = (char **) |
| 3905 | xrealloc (dirs.dirs, |
| 3906 | (dirs.num_dirs + DIR_ALLOC_CHUNK) * sizeof (char *)); |
| 3907 | if (dirs.num_dirs == 0) |
| 3908 | make_cleanup (free_current_contents, &dirs.dirs); |
| 3909 | } |
| 3910 | dirs.dirs[dirs.num_dirs++] = cur_dir; |
| 3911 | } |
| 3912 | line_ptr += bytes_read; |
| 3913 | |
| 3914 | /* Read file name table */ |
| 3915 | while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
| 3916 | { |
| 3917 | line_ptr += bytes_read; |
| 3918 | if ((files.num_files % FILE_ALLOC_CHUNK) == 0) |
| 3919 | { |
| 3920 | files.files = (struct fileinfo *) |
| 3921 | xrealloc (files.files, |
| 3922 | (files.num_files + FILE_ALLOC_CHUNK) |
| 3923 | * sizeof (struct fileinfo)); |
| 3924 | if (files.num_files == 0) |
| 3925 | make_cleanup (free_current_contents, &files.files); |
| 3926 | } |
| 3927 | files.files[files.num_files].name = cur_file; |
| 3928 | files.files[files.num_files].dir = |
| 3929 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 3930 | line_ptr += bytes_read; |
| 3931 | files.files[files.num_files].time = |
| 3932 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 3933 | line_ptr += bytes_read; |
| 3934 | files.files[files.num_files].size = |
| 3935 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 3936 | line_ptr += bytes_read; |
| 3937 | files.num_files++; |
| 3938 | } |
| 3939 | line_ptr += bytes_read; |
| 3940 | |
| 3941 | /* Read the statement sequences until there's nothing left. */ |
| 3942 | while (line_ptr < line_end) |
| 3943 | { |
| 3944 | /* state machine registers */ |
| 3945 | CORE_ADDR address = 0; |
| 3946 | unsigned int file = 1; |
| 3947 | unsigned int line = 1; |
| 3948 | unsigned int column = 0; |
| 3949 | int is_stmt = lh.default_is_stmt; |
| 3950 | int basic_block = 0; |
| 3951 | int end_sequence = 0; |
| 3952 | |
| 3953 | /* Start a subfile for the current file of the state machine. */ |
| 3954 | if (files.num_files >= file) |
| 3955 | { |
| 3956 | /* The file and directory tables are 0 based, the references |
| 3957 | are 1 based. */ |
| 3958 | dwarf2_start_subfile (files.files[file - 1].name, |
| 3959 | (files.files[file - 1].dir |
| 3960 | ? dirs.dirs[files.files[file - 1].dir - 1] |
| 3961 | : comp_dir)); |
| 3962 | } |
| 3963 | |
| 3964 | /* Decode the table. */ |
| 3965 | while (!end_sequence) |
| 3966 | { |
| 3967 | op_code = read_1_byte (abfd, line_ptr); |
| 3968 | line_ptr += 1; |
| 3969 | switch (op_code) |
| 3970 | { |
| 3971 | case DW_LNS_extended_op: |
| 3972 | line_ptr += 1; /* ignore length */ |
| 3973 | extended_op = read_1_byte (abfd, line_ptr); |
| 3974 | line_ptr += 1; |
| 3975 | switch (extended_op) |
| 3976 | { |
| 3977 | case DW_LNE_end_sequence: |
| 3978 | end_sequence = 1; |
| 3979 | /* Don't call record_line here. The end_sequence |
| 3980 | instruction provides the address of the first byte |
| 3981 | *after* the last line in the sequence; it's not the |
| 3982 | address of any real source line. However, the GDB |
| 3983 | linetable structure only records the starts of lines, |
| 3984 | not the ends. This is a weakness of GDB. */ |
| 3985 | break; |
| 3986 | case DW_LNE_set_address: |
| 3987 | address = read_address (abfd, line_ptr, cu_header, &bytes_read); |
| 3988 | line_ptr += bytes_read; |
| 3989 | address += baseaddr; |
| 3990 | break; |
| 3991 | case DW_LNE_define_file: |
| 3992 | cur_file = read_string (abfd, line_ptr, &bytes_read); |
| 3993 | line_ptr += bytes_read; |
| 3994 | if ((files.num_files % FILE_ALLOC_CHUNK) == 0) |
| 3995 | { |
| 3996 | files.files = (struct fileinfo *) |
| 3997 | xrealloc (files.files, |
| 3998 | (files.num_files + FILE_ALLOC_CHUNK) |
| 3999 | * sizeof (struct fileinfo)); |
| 4000 | if (files.num_files == 0) |
| 4001 | make_cleanup (free_current_contents, &files.files); |
| 4002 | } |
| 4003 | files.files[files.num_files].name = cur_file; |
| 4004 | files.files[files.num_files].dir = |
| 4005 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4006 | line_ptr += bytes_read; |
| 4007 | files.files[files.num_files].time = |
| 4008 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4009 | line_ptr += bytes_read; |
| 4010 | files.files[files.num_files].size = |
| 4011 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4012 | line_ptr += bytes_read; |
| 4013 | files.num_files++; |
| 4014 | break; |
| 4015 | default: |
| 4016 | complain (&dwarf2_mangled_line_number_section); |
| 4017 | goto done; |
| 4018 | } |
| 4019 | break; |
| 4020 | case DW_LNS_copy: |
| 4021 | record_line (current_subfile, line, address); |
| 4022 | basic_block = 0; |
| 4023 | break; |
| 4024 | case DW_LNS_advance_pc: |
| 4025 | address += lh.minimum_instruction_length |
| 4026 | * read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4027 | line_ptr += bytes_read; |
| 4028 | break; |
| 4029 | case DW_LNS_advance_line: |
| 4030 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); |
| 4031 | line_ptr += bytes_read; |
| 4032 | break; |
| 4033 | case DW_LNS_set_file: |
| 4034 | /* The file and directory tables are 0 based, the references |
| 4035 | are 1 based. */ |
| 4036 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4037 | line_ptr += bytes_read; |
| 4038 | dwarf2_start_subfile |
| 4039 | (files.files[file - 1].name, |
| 4040 | (files.files[file - 1].dir |
| 4041 | ? dirs.dirs[files.files[file - 1].dir - 1] |
| 4042 | : comp_dir)); |
| 4043 | break; |
| 4044 | case DW_LNS_set_column: |
| 4045 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 4046 | line_ptr += bytes_read; |
| 4047 | break; |
| 4048 | case DW_LNS_negate_stmt: |
| 4049 | is_stmt = (!is_stmt); |
| 4050 | break; |
| 4051 | case DW_LNS_set_basic_block: |
| 4052 | basic_block = 1; |
| 4053 | break; |
| 4054 | /* Add to the address register of the state machine the |
| 4055 | address increment value corresponding to special opcode |
| 4056 | 255. Ie, this value is scaled by the minimum instruction |
| 4057 | length since special opcode 255 would have scaled the |
| 4058 | the increment. */ |
| 4059 | case DW_LNS_const_add_pc: |
| 4060 | address += (lh.minimum_instruction_length |
| 4061 | * ((255 - lh.opcode_base) / lh.line_range)); |
| 4062 | break; |
| 4063 | case DW_LNS_fixed_advance_pc: |
| 4064 | address += read_2_bytes (abfd, line_ptr); |
| 4065 | line_ptr += 2; |
| 4066 | break; |
| 4067 | default: /* special operand */ |
| 4068 | adj_opcode = op_code - lh.opcode_base; |
| 4069 | address += (adj_opcode / lh.line_range) |
| 4070 | * lh.minimum_instruction_length; |
| 4071 | line += lh.line_base + (adj_opcode % lh.line_range); |
| 4072 | /* append row to matrix using current values */ |
| 4073 | record_line (current_subfile, line, address); |
| 4074 | basic_block = 1; |
| 4075 | } |
| 4076 | } |
| 4077 | } |
| 4078 | done: |
| 4079 | do_cleanups (back_to); |
| 4080 | } |
| 4081 | |
| 4082 | /* Start a subfile for DWARF. FILENAME is the name of the file and |
| 4083 | DIRNAME the name of the source directory which contains FILENAME |
| 4084 | or NULL if not known. |
| 4085 | This routine tries to keep line numbers from identical absolute and |
| 4086 | relative file names in a common subfile. |
| 4087 | |
| 4088 | Using the `list' example from the GDB testsuite, which resides in |
| 4089 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename |
| 4090 | of /srcdir/list0.c yields the following debugging information for list0.c: |
| 4091 | |
| 4092 | DW_AT_name: /srcdir/list0.c |
| 4093 | DW_AT_comp_dir: /compdir |
| 4094 | files.files[0].name: list0.h |
| 4095 | files.files[0].dir: /srcdir |
| 4096 | files.files[1].name: list0.c |
| 4097 | files.files[1].dir: /srcdir |
| 4098 | |
| 4099 | The line number information for list0.c has to end up in a single |
| 4100 | subfile, so that `break /srcdir/list0.c:1' works as expected. */ |
| 4101 | |
| 4102 | static void |
| 4103 | dwarf2_start_subfile (char *filename, char *dirname) |
| 4104 | { |
| 4105 | /* If the filename isn't absolute, try to match an existing subfile |
| 4106 | with the full pathname. */ |
| 4107 | |
| 4108 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
| 4109 | { |
| 4110 | struct subfile *subfile; |
| 4111 | char *fullname = concat (dirname, "/", filename, NULL); |
| 4112 | |
| 4113 | for (subfile = subfiles; subfile; subfile = subfile->next) |
| 4114 | { |
| 4115 | if (FILENAME_CMP (subfile->name, fullname) == 0) |
| 4116 | { |
| 4117 | current_subfile = subfile; |
| 4118 | xfree (fullname); |
| 4119 | return; |
| 4120 | } |
| 4121 | } |
| 4122 | xfree (fullname); |
| 4123 | } |
| 4124 | start_subfile (filename, dirname); |
| 4125 | } |
| 4126 | |
| 4127 | /* Given a pointer to a DWARF information entry, figure out if we need |
| 4128 | to make a symbol table entry for it, and if so, create a new entry |
| 4129 | and return a pointer to it. |
| 4130 | If TYPE is NULL, determine symbol type from the die, otherwise |
| 4131 | used the passed type. */ |
| 4132 | |
| 4133 | static struct symbol * |
| 4134 | new_symbol (struct die_info *die, struct type *type, struct objfile *objfile, |
| 4135 | const struct comp_unit_head *cu_header) |
| 4136 | { |
| 4137 | struct symbol *sym = NULL; |
| 4138 | char *name; |
| 4139 | struct attribute *attr = NULL; |
| 4140 | struct attribute *attr2 = NULL; |
| 4141 | CORE_ADDR addr; |
| 4142 | |
| 4143 | name = dwarf2_linkage_name (die); |
| 4144 | if (name) |
| 4145 | { |
| 4146 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
| 4147 | sizeof (struct symbol)); |
| 4148 | OBJSTAT (objfile, n_syms++); |
| 4149 | memset (sym, 0, sizeof (struct symbol)); |
| 4150 | SYMBOL_NAME (sym) = obsavestring (name, strlen (name), |
| 4151 | &objfile->symbol_obstack); |
| 4152 | |
| 4153 | /* Default assumptions. |
| 4154 | Use the passed type or decode it from the die. */ |
| 4155 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
| 4156 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 4157 | if (type != NULL) |
| 4158 | SYMBOL_TYPE (sym) = type; |
| 4159 | else |
| 4160 | SYMBOL_TYPE (sym) = die_type (die, objfile, cu_header); |
| 4161 | attr = dwarf_attr (die, DW_AT_decl_line); |
| 4162 | if (attr) |
| 4163 | { |
| 4164 | SYMBOL_LINE (sym) = DW_UNSND (attr); |
| 4165 | } |
| 4166 | |
| 4167 | /* If this symbol is from a C++ compilation, then attempt to |
| 4168 | cache the demangled form for future reference. This is a |
| 4169 | typical time versus space tradeoff, that was decided in favor |
| 4170 | of time because it sped up C++ symbol lookups by a factor of |
| 4171 | about 20. */ |
| 4172 | |
| 4173 | SYMBOL_LANGUAGE (sym) = cu_language; |
| 4174 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); |
| 4175 | switch (die->tag) |
| 4176 | { |
| 4177 | case DW_TAG_label: |
| 4178 | attr = dwarf_attr (die, DW_AT_low_pc); |
| 4179 | if (attr) |
| 4180 | { |
| 4181 | SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr; |
| 4182 | } |
| 4183 | SYMBOL_CLASS (sym) = LOC_LABEL; |
| 4184 | break; |
| 4185 | case DW_TAG_subprogram: |
| 4186 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by |
| 4187 | finish_block. */ |
| 4188 | SYMBOL_CLASS (sym) = LOC_BLOCK; |
| 4189 | attr2 = dwarf_attr (die, DW_AT_external); |
| 4190 | if (attr2 && (DW_UNSND (attr2) != 0)) |
| 4191 | { |
| 4192 | add_symbol_to_list (sym, &global_symbols); |
| 4193 | } |
| 4194 | else |
| 4195 | { |
| 4196 | add_symbol_to_list (sym, list_in_scope); |
| 4197 | } |
| 4198 | break; |
| 4199 | case DW_TAG_variable: |
| 4200 | /* Compilation with minimal debug info may result in variables |
| 4201 | with missing type entries. Change the misleading `void' type |
| 4202 | to something sensible. */ |
| 4203 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
| 4204 | SYMBOL_TYPE (sym) = init_type (TYPE_CODE_INT, |
| 4205 | TARGET_INT_BIT / HOST_CHAR_BIT, 0, |
| 4206 | "<variable, no debug info>", |
| 4207 | objfile); |
| 4208 | attr = dwarf_attr (die, DW_AT_const_value); |
| 4209 | if (attr) |
| 4210 | { |
| 4211 | dwarf2_const_value (attr, sym, objfile, cu_header); |
| 4212 | attr2 = dwarf_attr (die, DW_AT_external); |
| 4213 | if (attr2 && (DW_UNSND (attr2) != 0)) |
| 4214 | add_symbol_to_list (sym, &global_symbols); |
| 4215 | else |
| 4216 | add_symbol_to_list (sym, list_in_scope); |
| 4217 | break; |
| 4218 | } |
| 4219 | attr = dwarf_attr (die, DW_AT_location); |
| 4220 | if (attr) |
| 4221 | { |
| 4222 | attr2 = dwarf_attr (die, DW_AT_external); |
| 4223 | if (attr2 && (DW_UNSND (attr2) != 0)) |
| 4224 | { |
| 4225 | SYMBOL_VALUE_ADDRESS (sym) = |
| 4226 | decode_locdesc (DW_BLOCK (attr), objfile, cu_header); |
| 4227 | add_symbol_to_list (sym, &global_symbols); |
| 4228 | |
| 4229 | /* In shared libraries the address of the variable |
| 4230 | in the location descriptor might still be relocatable, |
| 4231 | so its value could be zero. |
| 4232 | Enter the symbol as a LOC_UNRESOLVED symbol, if its |
| 4233 | value is zero, the address of the variable will then |
| 4234 | be determined from the minimal symbol table whenever |
| 4235 | the variable is referenced. */ |
| 4236 | if (SYMBOL_VALUE_ADDRESS (sym)) |
| 4237 | { |
| 4238 | fixup_symbol_section (sym, objfile); |
| 4239 | SYMBOL_VALUE_ADDRESS (sym) += |
| 4240 | ANOFFSET (objfile->section_offsets, |
| 4241 | SYMBOL_SECTION (sym)); |
| 4242 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 4243 | } |
| 4244 | else |
| 4245 | SYMBOL_CLASS (sym) = LOC_UNRESOLVED; |
| 4246 | } |
| 4247 | else |
| 4248 | { |
| 4249 | SYMBOL_VALUE (sym) = addr = |
| 4250 | decode_locdesc (DW_BLOCK (attr), objfile, cu_header); |
| 4251 | add_symbol_to_list (sym, list_in_scope); |
| 4252 | if (optimized_out) |
| 4253 | { |
| 4254 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; |
| 4255 | } |
| 4256 | else if (isreg) |
| 4257 | { |
| 4258 | SYMBOL_CLASS (sym) = LOC_REGISTER; |
| 4259 | SYMBOL_VALUE (sym) = |
| 4260 | DWARF2_REG_TO_REGNUM (SYMBOL_VALUE (sym)); |
| 4261 | } |
| 4262 | else if (offreg) |
| 4263 | { |
| 4264 | SYMBOL_CLASS (sym) = LOC_BASEREG; |
| 4265 | SYMBOL_BASEREG (sym) = DWARF2_REG_TO_REGNUM (basereg); |
| 4266 | } |
| 4267 | else if (islocal) |
| 4268 | { |
| 4269 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
| 4270 | } |
| 4271 | else |
| 4272 | { |
| 4273 | fixup_symbol_section (sym, objfile); |
| 4274 | SYMBOL_VALUE_ADDRESS (sym) = |
| 4275 | addr + ANOFFSET (objfile->section_offsets, |
| 4276 | SYMBOL_SECTION (sym)); |
| 4277 | SYMBOL_CLASS (sym) = LOC_STATIC; |
| 4278 | } |
| 4279 | } |
| 4280 | } |
| 4281 | else |
| 4282 | { |
| 4283 | /* We do not know the address of this symbol. |
| 4284 | If it is an external symbol and we have type information |
| 4285 | for it, enter the symbol as a LOC_UNRESOLVED symbol. |
| 4286 | The address of the variable will then be determined from |
| 4287 | the minimal symbol table whenever the variable is |
| 4288 | referenced. */ |
| 4289 | attr2 = dwarf_attr (die, DW_AT_external); |
| 4290 | if (attr2 && (DW_UNSND (attr2) != 0) |
| 4291 | && dwarf_attr (die, DW_AT_type) != NULL) |
| 4292 | { |
| 4293 | SYMBOL_CLASS (sym) = LOC_UNRESOLVED; |
| 4294 | add_symbol_to_list (sym, &global_symbols); |
| 4295 | } |
| 4296 | } |
| 4297 | break; |
| 4298 | case DW_TAG_formal_parameter: |
| 4299 | attr = dwarf_attr (die, DW_AT_location); |
| 4300 | if (attr) |
| 4301 | { |
| 4302 | SYMBOL_VALUE (sym) = |
| 4303 | decode_locdesc (DW_BLOCK (attr), objfile, cu_header); |
| 4304 | if (isreg) |
| 4305 | { |
| 4306 | SYMBOL_CLASS (sym) = LOC_REGPARM; |
| 4307 | SYMBOL_VALUE (sym) = |
| 4308 | DWARF2_REG_TO_REGNUM (SYMBOL_VALUE (sym)); |
| 4309 | } |
| 4310 | else if (offreg) |
| 4311 | { |
| 4312 | if (isderef) |
| 4313 | { |
| 4314 | if (basereg != frame_base_reg) |
| 4315 | complain (&dwarf2_complex_location_expr); |
| 4316 | SYMBOL_CLASS (sym) = LOC_REF_ARG; |
| 4317 | } |
| 4318 | else |
| 4319 | { |
| 4320 | SYMBOL_CLASS (sym) = LOC_BASEREG_ARG; |
| 4321 | SYMBOL_BASEREG (sym) = DWARF2_REG_TO_REGNUM (basereg); |
| 4322 | } |
| 4323 | } |
| 4324 | else |
| 4325 | { |
| 4326 | SYMBOL_CLASS (sym) = LOC_ARG; |
| 4327 | } |
| 4328 | } |
| 4329 | attr = dwarf_attr (die, DW_AT_const_value); |
| 4330 | if (attr) |
| 4331 | { |
| 4332 | dwarf2_const_value (attr, sym, objfile, cu_header); |
| 4333 | } |
| 4334 | add_symbol_to_list (sym, list_in_scope); |
| 4335 | break; |
| 4336 | case DW_TAG_unspecified_parameters: |
| 4337 | /* From varargs functions; gdb doesn't seem to have any |
| 4338 | interest in this information, so just ignore it for now. |
| 4339 | (FIXME?) */ |
| 4340 | break; |
| 4341 | case DW_TAG_class_type: |
| 4342 | case DW_TAG_structure_type: |
| 4343 | case DW_TAG_union_type: |
| 4344 | case DW_TAG_enumeration_type: |
| 4345 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
| 4346 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; |
| 4347 | add_symbol_to_list (sym, list_in_scope); |
| 4348 | |
| 4349 | /* The semantics of C++ state that "struct foo { ... }" also |
| 4350 | defines a typedef for "foo". Synthesize a typedef symbol so |
| 4351 | that "ptype foo" works as expected. */ |
| 4352 | if (cu_language == language_cplus) |
| 4353 | { |
| 4354 | struct symbol *typedef_sym = (struct symbol *) |
| 4355 | obstack_alloc (&objfile->symbol_obstack, |
| 4356 | sizeof (struct symbol)); |
| 4357 | *typedef_sym = *sym; |
| 4358 | SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE; |
| 4359 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) |
| 4360 | TYPE_NAME (SYMBOL_TYPE (sym)) = |
| 4361 | obsavestring (SYMBOL_NAME (sym), |
| 4362 | strlen (SYMBOL_NAME (sym)), |
| 4363 | &objfile->type_obstack); |
| 4364 | add_symbol_to_list (typedef_sym, list_in_scope); |
| 4365 | } |
| 4366 | break; |
| 4367 | case DW_TAG_typedef: |
| 4368 | case DW_TAG_base_type: |
| 4369 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
| 4370 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
| 4371 | add_symbol_to_list (sym, list_in_scope); |
| 4372 | break; |
| 4373 | case DW_TAG_enumerator: |
| 4374 | attr = dwarf_attr (die, DW_AT_const_value); |
| 4375 | if (attr) |
| 4376 | { |
| 4377 | dwarf2_const_value (attr, sym, objfile, cu_header); |
| 4378 | } |
| 4379 | add_symbol_to_list (sym, list_in_scope); |
| 4380 | break; |
| 4381 | default: |
| 4382 | /* Not a tag we recognize. Hopefully we aren't processing |
| 4383 | trash data, but since we must specifically ignore things |
| 4384 | we don't recognize, there is nothing else we should do at |
| 4385 | this point. */ |
| 4386 | complain (&dwarf2_unsupported_tag, dwarf_tag_name (die->tag)); |
| 4387 | break; |
| 4388 | } |
| 4389 | } |
| 4390 | return (sym); |
| 4391 | } |
| 4392 | |
| 4393 | /* Copy constant value from an attribute to a symbol. */ |
| 4394 | |
| 4395 | static void |
| 4396 | dwarf2_const_value (struct attribute *attr, struct symbol *sym, |
| 4397 | struct objfile *objfile, |
| 4398 | const struct comp_unit_head *cu_header) |
| 4399 | { |
| 4400 | struct dwarf_block *blk; |
| 4401 | |
| 4402 | switch (attr->form) |
| 4403 | { |
| 4404 | case DW_FORM_addr: |
| 4405 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size) |
| 4406 | complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym), |
| 4407 | cu_header->addr_size, TYPE_LENGTH (SYMBOL_TYPE (sym))); |
| 4408 | SYMBOL_VALUE_BYTES (sym) = (char *) |
| 4409 | obstack_alloc (&objfile->symbol_obstack, cu_header->addr_size); |
| 4410 | store_address (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size, |
| 4411 | DW_ADDR (attr)); |
| 4412 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; |
| 4413 | break; |
| 4414 | case DW_FORM_block1: |
| 4415 | case DW_FORM_block2: |
| 4416 | case DW_FORM_block4: |
| 4417 | case DW_FORM_block: |
| 4418 | blk = DW_BLOCK (attr); |
| 4419 | if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size) |
| 4420 | complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym), |
| 4421 | blk->size, TYPE_LENGTH (SYMBOL_TYPE (sym))); |
| 4422 | SYMBOL_VALUE_BYTES (sym) = (char *) |
| 4423 | obstack_alloc (&objfile->symbol_obstack, blk->size); |
| 4424 | memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size); |
| 4425 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; |
| 4426 | break; |
| 4427 | |
| 4428 | /* The DW_AT_const_value attributes are supposed to carry the |
| 4429 | symbol's value "represented as it would be on the target |
| 4430 | architecture." By the time we get here, it's already been |
| 4431 | converted to host endianness, so we just need to sign- or |
| 4432 | zero-extend it as appropriate. */ |
| 4433 | case DW_FORM_data1: |
| 4434 | dwarf2_const_value_data (attr, sym, 8); |
| 4435 | break; |
| 4436 | case DW_FORM_data2: |
| 4437 | dwarf2_const_value_data (attr, sym, 16); |
| 4438 | break; |
| 4439 | case DW_FORM_data4: |
| 4440 | dwarf2_const_value_data (attr, sym, 32); |
| 4441 | break; |
| 4442 | case DW_FORM_data8: |
| 4443 | dwarf2_const_value_data (attr, sym, 64); |
| 4444 | break; |
| 4445 | |
| 4446 | case DW_FORM_sdata: |
| 4447 | SYMBOL_VALUE (sym) = DW_SND (attr); |
| 4448 | SYMBOL_CLASS (sym) = LOC_CONST; |
| 4449 | break; |
| 4450 | |
| 4451 | case DW_FORM_udata: |
| 4452 | SYMBOL_VALUE (sym) = DW_UNSND (attr); |
| 4453 | SYMBOL_CLASS (sym) = LOC_CONST; |
| 4454 | break; |
| 4455 | |
| 4456 | default: |
| 4457 | complain (&dwarf2_unsupported_const_value_attr, |
| 4458 | dwarf_form_name (attr->form)); |
| 4459 | SYMBOL_VALUE (sym) = 0; |
| 4460 | SYMBOL_CLASS (sym) = LOC_CONST; |
| 4461 | break; |
| 4462 | } |
| 4463 | } |
| 4464 | |
| 4465 | |
| 4466 | /* Given an attr with a DW_FORM_dataN value in host byte order, sign- |
| 4467 | or zero-extend it as appropriate for the symbol's type. */ |
| 4468 | static void |
| 4469 | dwarf2_const_value_data (struct attribute *attr, |
| 4470 | struct symbol *sym, |
| 4471 | int bits) |
| 4472 | { |
| 4473 | LONGEST l = DW_UNSND (attr); |
| 4474 | |
| 4475 | if (bits < sizeof (l) * 8) |
| 4476 | { |
| 4477 | if (TYPE_UNSIGNED (SYMBOL_TYPE (sym))) |
| 4478 | l &= ((LONGEST) 1 << bits) - 1; |
| 4479 | else |
| 4480 | l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits); |
| 4481 | } |
| 4482 | |
| 4483 | SYMBOL_VALUE (sym) = l; |
| 4484 | SYMBOL_CLASS (sym) = LOC_CONST; |
| 4485 | } |
| 4486 | |
| 4487 | |
| 4488 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
| 4489 | |
| 4490 | static struct type * |
| 4491 | die_type (struct die_info *die, struct objfile *objfile, |
| 4492 | const struct comp_unit_head *cu_header) |
| 4493 | { |
| 4494 | struct type *type; |
| 4495 | struct attribute *type_attr; |
| 4496 | struct die_info *type_die; |
| 4497 | unsigned int ref; |
| 4498 | |
| 4499 | type_attr = dwarf_attr (die, DW_AT_type); |
| 4500 | if (!type_attr) |
| 4501 | { |
| 4502 | /* A missing DW_AT_type represents a void type. */ |
| 4503 | return dwarf2_fundamental_type (objfile, FT_VOID); |
| 4504 | } |
| 4505 | else |
| 4506 | { |
| 4507 | ref = dwarf2_get_ref_die_offset (type_attr); |
| 4508 | type_die = follow_die_ref (ref); |
| 4509 | if (!type_die) |
| 4510 | { |
| 4511 | error ("Dwarf Error: Cannot find referent at offset %d.", ref); |
| 4512 | return NULL; |
| 4513 | } |
| 4514 | } |
| 4515 | type = tag_type_to_type (type_die, objfile, cu_header); |
| 4516 | if (!type) |
| 4517 | { |
| 4518 | dump_die (type_die); |
| 4519 | error ("Dwarf Error: Problem turning type die at offset into gdb type."); |
| 4520 | } |
| 4521 | return type; |
| 4522 | } |
| 4523 | |
| 4524 | /* Return the containing type of the die in question using its |
| 4525 | DW_AT_containing_type attribute. */ |
| 4526 | |
| 4527 | static struct type * |
| 4528 | die_containing_type (struct die_info *die, struct objfile *objfile, |
| 4529 | const struct comp_unit_head *cu_header) |
| 4530 | { |
| 4531 | struct type *type = NULL; |
| 4532 | struct attribute *type_attr; |
| 4533 | struct die_info *type_die = NULL; |
| 4534 | unsigned int ref; |
| 4535 | |
| 4536 | type_attr = dwarf_attr (die, DW_AT_containing_type); |
| 4537 | if (type_attr) |
| 4538 | { |
| 4539 | ref = dwarf2_get_ref_die_offset (type_attr); |
| 4540 | type_die = follow_die_ref (ref); |
| 4541 | if (!type_die) |
| 4542 | { |
| 4543 | error ("Dwarf Error: Cannot find referent at offset %d.", ref); |
| 4544 | return NULL; |
| 4545 | } |
| 4546 | type = tag_type_to_type (type_die, objfile, cu_header); |
| 4547 | } |
| 4548 | if (!type) |
| 4549 | { |
| 4550 | if (type_die) |
| 4551 | dump_die (type_die); |
| 4552 | error ("Dwarf Error: Problem turning containing type into gdb type."); |
| 4553 | } |
| 4554 | return type; |
| 4555 | } |
| 4556 | |
| 4557 | #if 0 |
| 4558 | static struct type * |
| 4559 | type_at_offset (unsigned int offset, struct objfile *objfile) |
| 4560 | { |
| 4561 | struct die_info *die; |
| 4562 | struct type *type; |
| 4563 | |
| 4564 | die = follow_die_ref (offset); |
| 4565 | if (!die) |
| 4566 | { |
| 4567 | error ("Dwarf Error: Cannot find type referent at offset %d.", offset); |
| 4568 | return NULL; |
| 4569 | } |
| 4570 | type = tag_type_to_type (die, objfile); |
| 4571 | return type; |
| 4572 | } |
| 4573 | #endif |
| 4574 | |
| 4575 | static struct type * |
| 4576 | tag_type_to_type (struct die_info *die, struct objfile *objfile, |
| 4577 | const struct comp_unit_head *cu_header) |
| 4578 | { |
| 4579 | if (die->type) |
| 4580 | { |
| 4581 | return die->type; |
| 4582 | } |
| 4583 | else |
| 4584 | { |
| 4585 | read_type_die (die, objfile, cu_header); |
| 4586 | if (!die->type) |
| 4587 | { |
| 4588 | dump_die (die); |
| 4589 | error ("Dwarf Error: Cannot find type of die."); |
| 4590 | } |
| 4591 | return die->type; |
| 4592 | } |
| 4593 | } |
| 4594 | |
| 4595 | static void |
| 4596 | read_type_die (struct die_info *die, struct objfile *objfile, |
| 4597 | const struct comp_unit_head *cu_header) |
| 4598 | { |
| 4599 | switch (die->tag) |
| 4600 | { |
| 4601 | case DW_TAG_class_type: |
| 4602 | case DW_TAG_structure_type: |
| 4603 | case DW_TAG_union_type: |
| 4604 | read_structure_scope (die, objfile, cu_header); |
| 4605 | break; |
| 4606 | case DW_TAG_enumeration_type: |
| 4607 | read_enumeration (die, objfile, cu_header); |
| 4608 | break; |
| 4609 | case DW_TAG_subprogram: |
| 4610 | case DW_TAG_subroutine_type: |
| 4611 | read_subroutine_type (die, objfile, cu_header); |
| 4612 | break; |
| 4613 | case DW_TAG_array_type: |
| 4614 | read_array_type (die, objfile, cu_header); |
| 4615 | break; |
| 4616 | case DW_TAG_pointer_type: |
| 4617 | read_tag_pointer_type (die, objfile, cu_header); |
| 4618 | break; |
| 4619 | case DW_TAG_ptr_to_member_type: |
| 4620 | read_tag_ptr_to_member_type (die, objfile, cu_header); |
| 4621 | break; |
| 4622 | case DW_TAG_reference_type: |
| 4623 | read_tag_reference_type (die, objfile, cu_header); |
| 4624 | break; |
| 4625 | case DW_TAG_const_type: |
| 4626 | read_tag_const_type (die, objfile, cu_header); |
| 4627 | break; |
| 4628 | case DW_TAG_volatile_type: |
| 4629 | read_tag_volatile_type (die, objfile, cu_header); |
| 4630 | break; |
| 4631 | case DW_TAG_string_type: |
| 4632 | read_tag_string_type (die, objfile); |
| 4633 | break; |
| 4634 | case DW_TAG_typedef: |
| 4635 | read_typedef (die, objfile, cu_header); |
| 4636 | break; |
| 4637 | case DW_TAG_base_type: |
| 4638 | read_base_type (die, objfile); |
| 4639 | break; |
| 4640 | default: |
| 4641 | complain (&dwarf2_unexpected_tag, dwarf_tag_name (die->tag)); |
| 4642 | break; |
| 4643 | } |
| 4644 | } |
| 4645 | |
| 4646 | static struct type * |
| 4647 | dwarf_base_type (int encoding, int size, struct objfile *objfile) |
| 4648 | { |
| 4649 | /* FIXME - this should not produce a new (struct type *) |
| 4650 | every time. It should cache base types. */ |
| 4651 | struct type *type; |
| 4652 | switch (encoding) |
| 4653 | { |
| 4654 | case DW_ATE_address: |
| 4655 | type = dwarf2_fundamental_type (objfile, FT_VOID); |
| 4656 | return type; |
| 4657 | case DW_ATE_boolean: |
| 4658 | type = dwarf2_fundamental_type (objfile, FT_BOOLEAN); |
| 4659 | return type; |
| 4660 | case DW_ATE_complex_float: |
| 4661 | if (size == 16) |
| 4662 | { |
| 4663 | type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX); |
| 4664 | } |
| 4665 | else |
| 4666 | { |
| 4667 | type = dwarf2_fundamental_type (objfile, FT_COMPLEX); |
| 4668 | } |
| 4669 | return type; |
| 4670 | case DW_ATE_float: |
| 4671 | if (size == 8) |
| 4672 | { |
| 4673 | type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT); |
| 4674 | } |
| 4675 | else |
| 4676 | { |
| 4677 | type = dwarf2_fundamental_type (objfile, FT_FLOAT); |
| 4678 | } |
| 4679 | return type; |
| 4680 | case DW_ATE_signed: |
| 4681 | switch (size) |
| 4682 | { |
| 4683 | case 1: |
| 4684 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR); |
| 4685 | break; |
| 4686 | case 2: |
| 4687 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT); |
| 4688 | break; |
| 4689 | default: |
| 4690 | case 4: |
| 4691 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER); |
| 4692 | break; |
| 4693 | } |
| 4694 | return type; |
| 4695 | case DW_ATE_signed_char: |
| 4696 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR); |
| 4697 | return type; |
| 4698 | case DW_ATE_unsigned: |
| 4699 | switch (size) |
| 4700 | { |
| 4701 | case 1: |
| 4702 | type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR); |
| 4703 | break; |
| 4704 | case 2: |
| 4705 | type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT); |
| 4706 | break; |
| 4707 | default: |
| 4708 | case 4: |
| 4709 | type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER); |
| 4710 | break; |
| 4711 | } |
| 4712 | return type; |
| 4713 | case DW_ATE_unsigned_char: |
| 4714 | type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR); |
| 4715 | return type; |
| 4716 | default: |
| 4717 | type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER); |
| 4718 | return type; |
| 4719 | } |
| 4720 | } |
| 4721 | |
| 4722 | #if 0 |
| 4723 | struct die_info * |
| 4724 | copy_die (struct die_info *old_die) |
| 4725 | { |
| 4726 | struct die_info *new_die; |
| 4727 | int i, num_attrs; |
| 4728 | |
| 4729 | new_die = (struct die_info *) xmalloc (sizeof (struct die_info)); |
| 4730 | memset (new_die, 0, sizeof (struct die_info)); |
| 4731 | |
| 4732 | new_die->tag = old_die->tag; |
| 4733 | new_die->has_children = old_die->has_children; |
| 4734 | new_die->abbrev = old_die->abbrev; |
| 4735 | new_die->offset = old_die->offset; |
| 4736 | new_die->type = NULL; |
| 4737 | |
| 4738 | num_attrs = old_die->num_attrs; |
| 4739 | new_die->num_attrs = num_attrs; |
| 4740 | new_die->attrs = (struct attribute *) |
| 4741 | xmalloc (num_attrs * sizeof (struct attribute)); |
| 4742 | |
| 4743 | for (i = 0; i < old_die->num_attrs; ++i) |
| 4744 | { |
| 4745 | new_die->attrs[i].name = old_die->attrs[i].name; |
| 4746 | new_die->attrs[i].form = old_die->attrs[i].form; |
| 4747 | new_die->attrs[i].u.addr = old_die->attrs[i].u.addr; |
| 4748 | } |
| 4749 | |
| 4750 | new_die->next = NULL; |
| 4751 | return new_die; |
| 4752 | } |
| 4753 | #endif |
| 4754 | |
| 4755 | /* Return sibling of die, NULL if no sibling. */ |
| 4756 | |
| 4757 | static struct die_info * |
| 4758 | sibling_die (struct die_info *die) |
| 4759 | { |
| 4760 | int nesting_level = 0; |
| 4761 | |
| 4762 | if (!die->has_children) |
| 4763 | { |
| 4764 | if (die->next && (die->next->tag == 0)) |
| 4765 | { |
| 4766 | return NULL; |
| 4767 | } |
| 4768 | else |
| 4769 | { |
| 4770 | return die->next; |
| 4771 | } |
| 4772 | } |
| 4773 | else |
| 4774 | { |
| 4775 | do |
| 4776 | { |
| 4777 | if (die->has_children) |
| 4778 | { |
| 4779 | nesting_level++; |
| 4780 | } |
| 4781 | if (die->tag == 0) |
| 4782 | { |
| 4783 | nesting_level--; |
| 4784 | } |
| 4785 | die = die->next; |
| 4786 | } |
| 4787 | while (nesting_level); |
| 4788 | if (die && (die->tag == 0)) |
| 4789 | { |
| 4790 | return NULL; |
| 4791 | } |
| 4792 | else |
| 4793 | { |
| 4794 | return die; |
| 4795 | } |
| 4796 | } |
| 4797 | } |
| 4798 | |
| 4799 | /* Get linkage name of a die, return NULL if not found. */ |
| 4800 | |
| 4801 | static char * |
| 4802 | dwarf2_linkage_name (struct die_info *die) |
| 4803 | { |
| 4804 | struct attribute *attr; |
| 4805 | |
| 4806 | attr = dwarf_attr (die, DW_AT_MIPS_linkage_name); |
| 4807 | if (attr && DW_STRING (attr)) |
| 4808 | return DW_STRING (attr); |
| 4809 | attr = dwarf_attr (die, DW_AT_name); |
| 4810 | if (attr && DW_STRING (attr)) |
| 4811 | return DW_STRING (attr); |
| 4812 | return NULL; |
| 4813 | } |
| 4814 | |
| 4815 | /* Convert a DIE tag into its string name. */ |
| 4816 | |
| 4817 | static char * |
| 4818 | dwarf_tag_name (register unsigned tag) |
| 4819 | { |
| 4820 | switch (tag) |
| 4821 | { |
| 4822 | case DW_TAG_padding: |
| 4823 | return "DW_TAG_padding"; |
| 4824 | case DW_TAG_array_type: |
| 4825 | return "DW_TAG_array_type"; |
| 4826 | case DW_TAG_class_type: |
| 4827 | return "DW_TAG_class_type"; |
| 4828 | case DW_TAG_entry_point: |
| 4829 | return "DW_TAG_entry_point"; |
| 4830 | case DW_TAG_enumeration_type: |
| 4831 | return "DW_TAG_enumeration_type"; |
| 4832 | case DW_TAG_formal_parameter: |
| 4833 | return "DW_TAG_formal_parameter"; |
| 4834 | case DW_TAG_imported_declaration: |
| 4835 | return "DW_TAG_imported_declaration"; |
| 4836 | case DW_TAG_label: |
| 4837 | return "DW_TAG_label"; |
| 4838 | case DW_TAG_lexical_block: |
| 4839 | return "DW_TAG_lexical_block"; |
| 4840 | case DW_TAG_member: |
| 4841 | return "DW_TAG_member"; |
| 4842 | case DW_TAG_pointer_type: |
| 4843 | return "DW_TAG_pointer_type"; |
| 4844 | case DW_TAG_reference_type: |
| 4845 | return "DW_TAG_reference_type"; |
| 4846 | case DW_TAG_compile_unit: |
| 4847 | return "DW_TAG_compile_unit"; |
| 4848 | case DW_TAG_string_type: |
| 4849 | return "DW_TAG_string_type"; |
| 4850 | case DW_TAG_structure_type: |
| 4851 | return "DW_TAG_structure_type"; |
| 4852 | case DW_TAG_subroutine_type: |
| 4853 | return "DW_TAG_subroutine_type"; |
| 4854 | case DW_TAG_typedef: |
| 4855 | return "DW_TAG_typedef"; |
| 4856 | case DW_TAG_union_type: |
| 4857 | return "DW_TAG_union_type"; |
| 4858 | case DW_TAG_unspecified_parameters: |
| 4859 | return "DW_TAG_unspecified_parameters"; |
| 4860 | case DW_TAG_variant: |
| 4861 | return "DW_TAG_variant"; |
| 4862 | case DW_TAG_common_block: |
| 4863 | return "DW_TAG_common_block"; |
| 4864 | case DW_TAG_common_inclusion: |
| 4865 | return "DW_TAG_common_inclusion"; |
| 4866 | case DW_TAG_inheritance: |
| 4867 | return "DW_TAG_inheritance"; |
| 4868 | case DW_TAG_inlined_subroutine: |
| 4869 | return "DW_TAG_inlined_subroutine"; |
| 4870 | case DW_TAG_module: |
| 4871 | return "DW_TAG_module"; |
| 4872 | case DW_TAG_ptr_to_member_type: |
| 4873 | return "DW_TAG_ptr_to_member_type"; |
| 4874 | case DW_TAG_set_type: |
| 4875 | return "DW_TAG_set_type"; |
| 4876 | case DW_TAG_subrange_type: |
| 4877 | return "DW_TAG_subrange_type"; |
| 4878 | case DW_TAG_with_stmt: |
| 4879 | return "DW_TAG_with_stmt"; |
| 4880 | case DW_TAG_access_declaration: |
| 4881 | return "DW_TAG_access_declaration"; |
| 4882 | case DW_TAG_base_type: |
| 4883 | return "DW_TAG_base_type"; |
| 4884 | case DW_TAG_catch_block: |
| 4885 | return "DW_TAG_catch_block"; |
| 4886 | case DW_TAG_const_type: |
| 4887 | return "DW_TAG_const_type"; |
| 4888 | case DW_TAG_constant: |
| 4889 | return "DW_TAG_constant"; |
| 4890 | case DW_TAG_enumerator: |
| 4891 | return "DW_TAG_enumerator"; |
| 4892 | case DW_TAG_file_type: |
| 4893 | return "DW_TAG_file_type"; |
| 4894 | case DW_TAG_friend: |
| 4895 | return "DW_TAG_friend"; |
| 4896 | case DW_TAG_namelist: |
| 4897 | return "DW_TAG_namelist"; |
| 4898 | case DW_TAG_namelist_item: |
| 4899 | return "DW_TAG_namelist_item"; |
| 4900 | case DW_TAG_packed_type: |
| 4901 | return "DW_TAG_packed_type"; |
| 4902 | case DW_TAG_subprogram: |
| 4903 | return "DW_TAG_subprogram"; |
| 4904 | case DW_TAG_template_type_param: |
| 4905 | return "DW_TAG_template_type_param"; |
| 4906 | case DW_TAG_template_value_param: |
| 4907 | return "DW_TAG_template_value_param"; |
| 4908 | case DW_TAG_thrown_type: |
| 4909 | return "DW_TAG_thrown_type"; |
| 4910 | case DW_TAG_try_block: |
| 4911 | return "DW_TAG_try_block"; |
| 4912 | case DW_TAG_variant_part: |
| 4913 | return "DW_TAG_variant_part"; |
| 4914 | case DW_TAG_variable: |
| 4915 | return "DW_TAG_variable"; |
| 4916 | case DW_TAG_volatile_type: |
| 4917 | return "DW_TAG_volatile_type"; |
| 4918 | case DW_TAG_MIPS_loop: |
| 4919 | return "DW_TAG_MIPS_loop"; |
| 4920 | case DW_TAG_format_label: |
| 4921 | return "DW_TAG_format_label"; |
| 4922 | case DW_TAG_function_template: |
| 4923 | return "DW_TAG_function_template"; |
| 4924 | case DW_TAG_class_template: |
| 4925 | return "DW_TAG_class_template"; |
| 4926 | default: |
| 4927 | return "DW_TAG_<unknown>"; |
| 4928 | } |
| 4929 | } |
| 4930 | |
| 4931 | /* Convert a DWARF attribute code into its string name. */ |
| 4932 | |
| 4933 | static char * |
| 4934 | dwarf_attr_name (register unsigned attr) |
| 4935 | { |
| 4936 | switch (attr) |
| 4937 | { |
| 4938 | case DW_AT_sibling: |
| 4939 | return "DW_AT_sibling"; |
| 4940 | case DW_AT_location: |
| 4941 | return "DW_AT_location"; |
| 4942 | case DW_AT_name: |
| 4943 | return "DW_AT_name"; |
| 4944 | case DW_AT_ordering: |
| 4945 | return "DW_AT_ordering"; |
| 4946 | case DW_AT_subscr_data: |
| 4947 | return "DW_AT_subscr_data"; |
| 4948 | case DW_AT_byte_size: |
| 4949 | return "DW_AT_byte_size"; |
| 4950 | case DW_AT_bit_offset: |
| 4951 | return "DW_AT_bit_offset"; |
| 4952 | case DW_AT_bit_size: |
| 4953 | return "DW_AT_bit_size"; |
| 4954 | case DW_AT_element_list: |
| 4955 | return "DW_AT_element_list"; |
| 4956 | case DW_AT_stmt_list: |
| 4957 | return "DW_AT_stmt_list"; |
| 4958 | case DW_AT_low_pc: |
| 4959 | return "DW_AT_low_pc"; |
| 4960 | case DW_AT_high_pc: |
| 4961 | return "DW_AT_high_pc"; |
| 4962 | case DW_AT_language: |
| 4963 | return "DW_AT_language"; |
| 4964 | case DW_AT_member: |
| 4965 | return "DW_AT_member"; |
| 4966 | case DW_AT_discr: |
| 4967 | return "DW_AT_discr"; |
| 4968 | case DW_AT_discr_value: |
| 4969 | return "DW_AT_discr_value"; |
| 4970 | case DW_AT_visibility: |
| 4971 | return "DW_AT_visibility"; |
| 4972 | case DW_AT_import: |
| 4973 | return "DW_AT_import"; |
| 4974 | case DW_AT_string_length: |
| 4975 | return "DW_AT_string_length"; |
| 4976 | case DW_AT_common_reference: |
| 4977 | return "DW_AT_common_reference"; |
| 4978 | case DW_AT_comp_dir: |
| 4979 | return "DW_AT_comp_dir"; |
| 4980 | case DW_AT_const_value: |
| 4981 | return "DW_AT_const_value"; |
| 4982 | case DW_AT_containing_type: |
| 4983 | return "DW_AT_containing_type"; |
| 4984 | case DW_AT_default_value: |
| 4985 | return "DW_AT_default_value"; |
| 4986 | case DW_AT_inline: |
| 4987 | return "DW_AT_inline"; |
| 4988 | case DW_AT_is_optional: |
| 4989 | return "DW_AT_is_optional"; |
| 4990 | case DW_AT_lower_bound: |
| 4991 | return "DW_AT_lower_bound"; |
| 4992 | case DW_AT_producer: |
| 4993 | return "DW_AT_producer"; |
| 4994 | case DW_AT_prototyped: |
| 4995 | return "DW_AT_prototyped"; |
| 4996 | case DW_AT_return_addr: |
| 4997 | return "DW_AT_return_addr"; |
| 4998 | case DW_AT_start_scope: |
| 4999 | return "DW_AT_start_scope"; |
| 5000 | case DW_AT_stride_size: |
| 5001 | return "DW_AT_stride_size"; |
| 5002 | case DW_AT_upper_bound: |
| 5003 | return "DW_AT_upper_bound"; |
| 5004 | case DW_AT_abstract_origin: |
| 5005 | return "DW_AT_abstract_origin"; |
| 5006 | case DW_AT_accessibility: |
| 5007 | return "DW_AT_accessibility"; |
| 5008 | case DW_AT_address_class: |
| 5009 | return "DW_AT_address_class"; |
| 5010 | case DW_AT_artificial: |
| 5011 | return "DW_AT_artificial"; |
| 5012 | case DW_AT_base_types: |
| 5013 | return "DW_AT_base_types"; |
| 5014 | case DW_AT_calling_convention: |
| 5015 | return "DW_AT_calling_convention"; |
| 5016 | case DW_AT_count: |
| 5017 | return "DW_AT_count"; |
| 5018 | case DW_AT_data_member_location: |
| 5019 | return "DW_AT_data_member_location"; |
| 5020 | case DW_AT_decl_column: |
| 5021 | return "DW_AT_decl_column"; |
| 5022 | case DW_AT_decl_file: |
| 5023 | return "DW_AT_decl_file"; |
| 5024 | case DW_AT_decl_line: |
| 5025 | return "DW_AT_decl_line"; |
| 5026 | case DW_AT_declaration: |
| 5027 | return "DW_AT_declaration"; |
| 5028 | case DW_AT_discr_list: |
| 5029 | return "DW_AT_discr_list"; |
| 5030 | case DW_AT_encoding: |
| 5031 | return "DW_AT_encoding"; |
| 5032 | case DW_AT_external: |
| 5033 | return "DW_AT_external"; |
| 5034 | case DW_AT_frame_base: |
| 5035 | return "DW_AT_frame_base"; |
| 5036 | case DW_AT_friend: |
| 5037 | return "DW_AT_friend"; |
| 5038 | case DW_AT_identifier_case: |
| 5039 | return "DW_AT_identifier_case"; |
| 5040 | case DW_AT_macro_info: |
| 5041 | return "DW_AT_macro_info"; |
| 5042 | case DW_AT_namelist_items: |
| 5043 | return "DW_AT_namelist_items"; |
| 5044 | case DW_AT_priority: |
| 5045 | return "DW_AT_priority"; |
| 5046 | case DW_AT_segment: |
| 5047 | return "DW_AT_segment"; |
| 5048 | case DW_AT_specification: |
| 5049 | return "DW_AT_specification"; |
| 5050 | case DW_AT_static_link: |
| 5051 | return "DW_AT_static_link"; |
| 5052 | case DW_AT_type: |
| 5053 | return "DW_AT_type"; |
| 5054 | case DW_AT_use_location: |
| 5055 | return "DW_AT_use_location"; |
| 5056 | case DW_AT_variable_parameter: |
| 5057 | return "DW_AT_variable_parameter"; |
| 5058 | case DW_AT_virtuality: |
| 5059 | return "DW_AT_virtuality"; |
| 5060 | case DW_AT_vtable_elem_location: |
| 5061 | return "DW_AT_vtable_elem_location"; |
| 5062 | |
| 5063 | #ifdef MIPS |
| 5064 | case DW_AT_MIPS_fde: |
| 5065 | return "DW_AT_MIPS_fde"; |
| 5066 | case DW_AT_MIPS_loop_begin: |
| 5067 | return "DW_AT_MIPS_loop_begin"; |
| 5068 | case DW_AT_MIPS_tail_loop_begin: |
| 5069 | return "DW_AT_MIPS_tail_loop_begin"; |
| 5070 | case DW_AT_MIPS_epilog_begin: |
| 5071 | return "DW_AT_MIPS_epilog_begin"; |
| 5072 | case DW_AT_MIPS_loop_unroll_factor: |
| 5073 | return "DW_AT_MIPS_loop_unroll_factor"; |
| 5074 | case DW_AT_MIPS_software_pipeline_depth: |
| 5075 | return "DW_AT_MIPS_software_pipeline_depth"; |
| 5076 | case DW_AT_MIPS_linkage_name: |
| 5077 | return "DW_AT_MIPS_linkage_name"; |
| 5078 | #endif |
| 5079 | |
| 5080 | case DW_AT_sf_names: |
| 5081 | return "DW_AT_sf_names"; |
| 5082 | case DW_AT_src_info: |
| 5083 | return "DW_AT_src_info"; |
| 5084 | case DW_AT_mac_info: |
| 5085 | return "DW_AT_mac_info"; |
| 5086 | case DW_AT_src_coords: |
| 5087 | return "DW_AT_src_coords"; |
| 5088 | case DW_AT_body_begin: |
| 5089 | return "DW_AT_body_begin"; |
| 5090 | case DW_AT_body_end: |
| 5091 | return "DW_AT_body_end"; |
| 5092 | default: |
| 5093 | return "DW_AT_<unknown>"; |
| 5094 | } |
| 5095 | } |
| 5096 | |
| 5097 | /* Convert a DWARF value form code into its string name. */ |
| 5098 | |
| 5099 | static char * |
| 5100 | dwarf_form_name (register unsigned form) |
| 5101 | { |
| 5102 | switch (form) |
| 5103 | { |
| 5104 | case DW_FORM_addr: |
| 5105 | return "DW_FORM_addr"; |
| 5106 | case DW_FORM_block2: |
| 5107 | return "DW_FORM_block2"; |
| 5108 | case DW_FORM_block4: |
| 5109 | return "DW_FORM_block4"; |
| 5110 | case DW_FORM_data2: |
| 5111 | return "DW_FORM_data2"; |
| 5112 | case DW_FORM_data4: |
| 5113 | return "DW_FORM_data4"; |
| 5114 | case DW_FORM_data8: |
| 5115 | return "DW_FORM_data8"; |
| 5116 | case DW_FORM_string: |
| 5117 | return "DW_FORM_string"; |
| 5118 | case DW_FORM_block: |
| 5119 | return "DW_FORM_block"; |
| 5120 | case DW_FORM_block1: |
| 5121 | return "DW_FORM_block1"; |
| 5122 | case DW_FORM_data1: |
| 5123 | return "DW_FORM_data1"; |
| 5124 | case DW_FORM_flag: |
| 5125 | return "DW_FORM_flag"; |
| 5126 | case DW_FORM_sdata: |
| 5127 | return "DW_FORM_sdata"; |
| 5128 | case DW_FORM_strp: |
| 5129 | return "DW_FORM_strp"; |
| 5130 | case DW_FORM_udata: |
| 5131 | return "DW_FORM_udata"; |
| 5132 | case DW_FORM_ref_addr: |
| 5133 | return "DW_FORM_ref_addr"; |
| 5134 | case DW_FORM_ref1: |
| 5135 | return "DW_FORM_ref1"; |
| 5136 | case DW_FORM_ref2: |
| 5137 | return "DW_FORM_ref2"; |
| 5138 | case DW_FORM_ref4: |
| 5139 | return "DW_FORM_ref4"; |
| 5140 | case DW_FORM_ref8: |
| 5141 | return "DW_FORM_ref8"; |
| 5142 | case DW_FORM_ref_udata: |
| 5143 | return "DW_FORM_ref_udata"; |
| 5144 | case DW_FORM_indirect: |
| 5145 | return "DW_FORM_indirect"; |
| 5146 | default: |
| 5147 | return "DW_FORM_<unknown>"; |
| 5148 | } |
| 5149 | } |
| 5150 | |
| 5151 | /* Convert a DWARF stack opcode into its string name. */ |
| 5152 | |
| 5153 | static char * |
| 5154 | dwarf_stack_op_name (register unsigned op) |
| 5155 | { |
| 5156 | switch (op) |
| 5157 | { |
| 5158 | case DW_OP_addr: |
| 5159 | return "DW_OP_addr"; |
| 5160 | case DW_OP_deref: |
| 5161 | return "DW_OP_deref"; |
| 5162 | case DW_OP_const1u: |
| 5163 | return "DW_OP_const1u"; |
| 5164 | case DW_OP_const1s: |
| 5165 | return "DW_OP_const1s"; |
| 5166 | case DW_OP_const2u: |
| 5167 | return "DW_OP_const2u"; |
| 5168 | case DW_OP_const2s: |
| 5169 | return "DW_OP_const2s"; |
| 5170 | case DW_OP_const4u: |
| 5171 | return "DW_OP_const4u"; |
| 5172 | case DW_OP_const4s: |
| 5173 | return "DW_OP_const4s"; |
| 5174 | case DW_OP_const8u: |
| 5175 | return "DW_OP_const8u"; |
| 5176 | case DW_OP_const8s: |
| 5177 | return "DW_OP_const8s"; |
| 5178 | case DW_OP_constu: |
| 5179 | return "DW_OP_constu"; |
| 5180 | case DW_OP_consts: |
| 5181 | return "DW_OP_consts"; |
| 5182 | case DW_OP_dup: |
| 5183 | return "DW_OP_dup"; |
| 5184 | case DW_OP_drop: |
| 5185 | return "DW_OP_drop"; |
| 5186 | case DW_OP_over: |
| 5187 | return "DW_OP_over"; |
| 5188 | case DW_OP_pick: |
| 5189 | return "DW_OP_pick"; |
| 5190 | case DW_OP_swap: |
| 5191 | return "DW_OP_swap"; |
| 5192 | case DW_OP_rot: |
| 5193 | return "DW_OP_rot"; |
| 5194 | case DW_OP_xderef: |
| 5195 | return "DW_OP_xderef"; |
| 5196 | case DW_OP_abs: |
| 5197 | return "DW_OP_abs"; |
| 5198 | case DW_OP_and: |
| 5199 | return "DW_OP_and"; |
| 5200 | case DW_OP_div: |
| 5201 | return "DW_OP_div"; |
| 5202 | case DW_OP_minus: |
| 5203 | return "DW_OP_minus"; |
| 5204 | case DW_OP_mod: |
| 5205 | return "DW_OP_mod"; |
| 5206 | case DW_OP_mul: |
| 5207 | return "DW_OP_mul"; |
| 5208 | case DW_OP_neg: |
| 5209 | return "DW_OP_neg"; |
| 5210 | case DW_OP_not: |
| 5211 | return "DW_OP_not"; |
| 5212 | case DW_OP_or: |
| 5213 | return "DW_OP_or"; |
| 5214 | case DW_OP_plus: |
| 5215 | return "DW_OP_plus"; |
| 5216 | case DW_OP_plus_uconst: |
| 5217 | return "DW_OP_plus_uconst"; |
| 5218 | case DW_OP_shl: |
| 5219 | return "DW_OP_shl"; |
| 5220 | case DW_OP_shr: |
| 5221 | return "DW_OP_shr"; |
| 5222 | case DW_OP_shra: |
| 5223 | return "DW_OP_shra"; |
| 5224 | case DW_OP_xor: |
| 5225 | return "DW_OP_xor"; |
| 5226 | case DW_OP_bra: |
| 5227 | return "DW_OP_bra"; |
| 5228 | case DW_OP_eq: |
| 5229 | return "DW_OP_eq"; |
| 5230 | case DW_OP_ge: |
| 5231 | return "DW_OP_ge"; |
| 5232 | case DW_OP_gt: |
| 5233 | return "DW_OP_gt"; |
| 5234 | case DW_OP_le: |
| 5235 | return "DW_OP_le"; |
| 5236 | case DW_OP_lt: |
| 5237 | return "DW_OP_lt"; |
| 5238 | case DW_OP_ne: |
| 5239 | return "DW_OP_ne"; |
| 5240 | case DW_OP_skip: |
| 5241 | return "DW_OP_skip"; |
| 5242 | case DW_OP_lit0: |
| 5243 | return "DW_OP_lit0"; |
| 5244 | case DW_OP_lit1: |
| 5245 | return "DW_OP_lit1"; |
| 5246 | case DW_OP_lit2: |
| 5247 | return "DW_OP_lit2"; |
| 5248 | case DW_OP_lit3: |
| 5249 | return "DW_OP_lit3"; |
| 5250 | case DW_OP_lit4: |
| 5251 | return "DW_OP_lit4"; |
| 5252 | case DW_OP_lit5: |
| 5253 | return "DW_OP_lit5"; |
| 5254 | case DW_OP_lit6: |
| 5255 | return "DW_OP_lit6"; |
| 5256 | case DW_OP_lit7: |
| 5257 | return "DW_OP_lit7"; |
| 5258 | case DW_OP_lit8: |
| 5259 | return "DW_OP_lit8"; |
| 5260 | case DW_OP_lit9: |
| 5261 | return "DW_OP_lit9"; |
| 5262 | case DW_OP_lit10: |
| 5263 | return "DW_OP_lit10"; |
| 5264 | case DW_OP_lit11: |
| 5265 | return "DW_OP_lit11"; |
| 5266 | case DW_OP_lit12: |
| 5267 | return "DW_OP_lit12"; |
| 5268 | case DW_OP_lit13: |
| 5269 | return "DW_OP_lit13"; |
| 5270 | case DW_OP_lit14: |
| 5271 | return "DW_OP_lit14"; |
| 5272 | case DW_OP_lit15: |
| 5273 | return "DW_OP_lit15"; |
| 5274 | case DW_OP_lit16: |
| 5275 | return "DW_OP_lit16"; |
| 5276 | case DW_OP_lit17: |
| 5277 | return "DW_OP_lit17"; |
| 5278 | case DW_OP_lit18: |
| 5279 | return "DW_OP_lit18"; |
| 5280 | case DW_OP_lit19: |
| 5281 | return "DW_OP_lit19"; |
| 5282 | case DW_OP_lit20: |
| 5283 | return "DW_OP_lit20"; |
| 5284 | case DW_OP_lit21: |
| 5285 | return "DW_OP_lit21"; |
| 5286 | case DW_OP_lit22: |
| 5287 | return "DW_OP_lit22"; |
| 5288 | case DW_OP_lit23: |
| 5289 | return "DW_OP_lit23"; |
| 5290 | case DW_OP_lit24: |
| 5291 | return "DW_OP_lit24"; |
| 5292 | case DW_OP_lit25: |
| 5293 | return "DW_OP_lit25"; |
| 5294 | case DW_OP_lit26: |
| 5295 | return "DW_OP_lit26"; |
| 5296 | case DW_OP_lit27: |
| 5297 | return "DW_OP_lit27"; |
| 5298 | case DW_OP_lit28: |
| 5299 | return "DW_OP_lit28"; |
| 5300 | case DW_OP_lit29: |
| 5301 | return "DW_OP_lit29"; |
| 5302 | case DW_OP_lit30: |
| 5303 | return "DW_OP_lit30"; |
| 5304 | case DW_OP_lit31: |
| 5305 | return "DW_OP_lit31"; |
| 5306 | case DW_OP_reg0: |
| 5307 | return "DW_OP_reg0"; |
| 5308 | case DW_OP_reg1: |
| 5309 | return "DW_OP_reg1"; |
| 5310 | case DW_OP_reg2: |
| 5311 | return "DW_OP_reg2"; |
| 5312 | case DW_OP_reg3: |
| 5313 | return "DW_OP_reg3"; |
| 5314 | case DW_OP_reg4: |
| 5315 | return "DW_OP_reg4"; |
| 5316 | case DW_OP_reg5: |
| 5317 | return "DW_OP_reg5"; |
| 5318 | case DW_OP_reg6: |
| 5319 | return "DW_OP_reg6"; |
| 5320 | case DW_OP_reg7: |
| 5321 | return "DW_OP_reg7"; |
| 5322 | case DW_OP_reg8: |
| 5323 | return "DW_OP_reg8"; |
| 5324 | case DW_OP_reg9: |
| 5325 | return "DW_OP_reg9"; |
| 5326 | case DW_OP_reg10: |
| 5327 | return "DW_OP_reg10"; |
| 5328 | case DW_OP_reg11: |
| 5329 | return "DW_OP_reg11"; |
| 5330 | case DW_OP_reg12: |
| 5331 | return "DW_OP_reg12"; |
| 5332 | case DW_OP_reg13: |
| 5333 | return "DW_OP_reg13"; |
| 5334 | case DW_OP_reg14: |
| 5335 | return "DW_OP_reg14"; |
| 5336 | case DW_OP_reg15: |
| 5337 | return "DW_OP_reg15"; |
| 5338 | case DW_OP_reg16: |
| 5339 | return "DW_OP_reg16"; |
| 5340 | case DW_OP_reg17: |
| 5341 | return "DW_OP_reg17"; |
| 5342 | case DW_OP_reg18: |
| 5343 | return "DW_OP_reg18"; |
| 5344 | case DW_OP_reg19: |
| 5345 | return "DW_OP_reg19"; |
| 5346 | case DW_OP_reg20: |
| 5347 | return "DW_OP_reg20"; |
| 5348 | case DW_OP_reg21: |
| 5349 | return "DW_OP_reg21"; |
| 5350 | case DW_OP_reg22: |
| 5351 | return "DW_OP_reg22"; |
| 5352 | case DW_OP_reg23: |
| 5353 | return "DW_OP_reg23"; |
| 5354 | case DW_OP_reg24: |
| 5355 | return "DW_OP_reg24"; |
| 5356 | case DW_OP_reg25: |
| 5357 | return "DW_OP_reg25"; |
| 5358 | case DW_OP_reg26: |
| 5359 | return "DW_OP_reg26"; |
| 5360 | case DW_OP_reg27: |
| 5361 | return "DW_OP_reg27"; |
| 5362 | case DW_OP_reg28: |
| 5363 | return "DW_OP_reg28"; |
| 5364 | case DW_OP_reg29: |
| 5365 | return "DW_OP_reg29"; |
| 5366 | case DW_OP_reg30: |
| 5367 | return "DW_OP_reg30"; |
| 5368 | case DW_OP_reg31: |
| 5369 | return "DW_OP_reg31"; |
| 5370 | case DW_OP_breg0: |
| 5371 | return "DW_OP_breg0"; |
| 5372 | case DW_OP_breg1: |
| 5373 | return "DW_OP_breg1"; |
| 5374 | case DW_OP_breg2: |
| 5375 | return "DW_OP_breg2"; |
| 5376 | case DW_OP_breg3: |
| 5377 | return "DW_OP_breg3"; |
| 5378 | case DW_OP_breg4: |
| 5379 | return "DW_OP_breg4"; |
| 5380 | case DW_OP_breg5: |
| 5381 | return "DW_OP_breg5"; |
| 5382 | case DW_OP_breg6: |
| 5383 | return "DW_OP_breg6"; |
| 5384 | case DW_OP_breg7: |
| 5385 | return "DW_OP_breg7"; |
| 5386 | case DW_OP_breg8: |
| 5387 | return "DW_OP_breg8"; |
| 5388 | case DW_OP_breg9: |
| 5389 | return "DW_OP_breg9"; |
| 5390 | case DW_OP_breg10: |
| 5391 | return "DW_OP_breg10"; |
| 5392 | case DW_OP_breg11: |
| 5393 | return "DW_OP_breg11"; |
| 5394 | case DW_OP_breg12: |
| 5395 | return "DW_OP_breg12"; |
| 5396 | case DW_OP_breg13: |
| 5397 | return "DW_OP_breg13"; |
| 5398 | case DW_OP_breg14: |
| 5399 | return "DW_OP_breg14"; |
| 5400 | case DW_OP_breg15: |
| 5401 | return "DW_OP_breg15"; |
| 5402 | case DW_OP_breg16: |
| 5403 | return "DW_OP_breg16"; |
| 5404 | case DW_OP_breg17: |
| 5405 | return "DW_OP_breg17"; |
| 5406 | case DW_OP_breg18: |
| 5407 | return "DW_OP_breg18"; |
| 5408 | case DW_OP_breg19: |
| 5409 | return "DW_OP_breg19"; |
| 5410 | case DW_OP_breg20: |
| 5411 | return "DW_OP_breg20"; |
| 5412 | case DW_OP_breg21: |
| 5413 | return "DW_OP_breg21"; |
| 5414 | case DW_OP_breg22: |
| 5415 | return "DW_OP_breg22"; |
| 5416 | case DW_OP_breg23: |
| 5417 | return "DW_OP_breg23"; |
| 5418 | case DW_OP_breg24: |
| 5419 | return "DW_OP_breg24"; |
| 5420 | case DW_OP_breg25: |
| 5421 | return "DW_OP_breg25"; |
| 5422 | case DW_OP_breg26: |
| 5423 | return "DW_OP_breg26"; |
| 5424 | case DW_OP_breg27: |
| 5425 | return "DW_OP_breg27"; |
| 5426 | case DW_OP_breg28: |
| 5427 | return "DW_OP_breg28"; |
| 5428 | case DW_OP_breg29: |
| 5429 | return "DW_OP_breg29"; |
| 5430 | case DW_OP_breg30: |
| 5431 | return "DW_OP_breg30"; |
| 5432 | case DW_OP_breg31: |
| 5433 | return "DW_OP_breg31"; |
| 5434 | case DW_OP_regx: |
| 5435 | return "DW_OP_regx"; |
| 5436 | case DW_OP_fbreg: |
| 5437 | return "DW_OP_fbreg"; |
| 5438 | case DW_OP_bregx: |
| 5439 | return "DW_OP_bregx"; |
| 5440 | case DW_OP_piece: |
| 5441 | return "DW_OP_piece"; |
| 5442 | case DW_OP_deref_size: |
| 5443 | return "DW_OP_deref_size"; |
| 5444 | case DW_OP_xderef_size: |
| 5445 | return "DW_OP_xderef_size"; |
| 5446 | case DW_OP_nop: |
| 5447 | return "DW_OP_nop"; |
| 5448 | default: |
| 5449 | return "OP_<unknown>"; |
| 5450 | } |
| 5451 | } |
| 5452 | |
| 5453 | static char * |
| 5454 | dwarf_bool_name (unsigned mybool) |
| 5455 | { |
| 5456 | if (mybool) |
| 5457 | return "TRUE"; |
| 5458 | else |
| 5459 | return "FALSE"; |
| 5460 | } |
| 5461 | |
| 5462 | /* Convert a DWARF type code into its string name. */ |
| 5463 | |
| 5464 | static char * |
| 5465 | dwarf_type_encoding_name (register unsigned enc) |
| 5466 | { |
| 5467 | switch (enc) |
| 5468 | { |
| 5469 | case DW_ATE_address: |
| 5470 | return "DW_ATE_address"; |
| 5471 | case DW_ATE_boolean: |
| 5472 | return "DW_ATE_boolean"; |
| 5473 | case DW_ATE_complex_float: |
| 5474 | return "DW_ATE_complex_float"; |
| 5475 | case DW_ATE_float: |
| 5476 | return "DW_ATE_float"; |
| 5477 | case DW_ATE_signed: |
| 5478 | return "DW_ATE_signed"; |
| 5479 | case DW_ATE_signed_char: |
| 5480 | return "DW_ATE_signed_char"; |
| 5481 | case DW_ATE_unsigned: |
| 5482 | return "DW_ATE_unsigned"; |
| 5483 | case DW_ATE_unsigned_char: |
| 5484 | return "DW_ATE_unsigned_char"; |
| 5485 | default: |
| 5486 | return "DW_ATE_<unknown>"; |
| 5487 | } |
| 5488 | } |
| 5489 | |
| 5490 | /* Convert a DWARF call frame info operation to its string name. */ |
| 5491 | |
| 5492 | #if 0 |
| 5493 | static char * |
| 5494 | dwarf_cfi_name (register unsigned cfi_opc) |
| 5495 | { |
| 5496 | switch (cfi_opc) |
| 5497 | { |
| 5498 | case DW_CFA_advance_loc: |
| 5499 | return "DW_CFA_advance_loc"; |
| 5500 | case DW_CFA_offset: |
| 5501 | return "DW_CFA_offset"; |
| 5502 | case DW_CFA_restore: |
| 5503 | return "DW_CFA_restore"; |
| 5504 | case DW_CFA_nop: |
| 5505 | return "DW_CFA_nop"; |
| 5506 | case DW_CFA_set_loc: |
| 5507 | return "DW_CFA_set_loc"; |
| 5508 | case DW_CFA_advance_loc1: |
| 5509 | return "DW_CFA_advance_loc1"; |
| 5510 | case DW_CFA_advance_loc2: |
| 5511 | return "DW_CFA_advance_loc2"; |
| 5512 | case DW_CFA_advance_loc4: |
| 5513 | return "DW_CFA_advance_loc4"; |
| 5514 | case DW_CFA_offset_extended: |
| 5515 | return "DW_CFA_offset_extended"; |
| 5516 | case DW_CFA_restore_extended: |
| 5517 | return "DW_CFA_restore_extended"; |
| 5518 | case DW_CFA_undefined: |
| 5519 | return "DW_CFA_undefined"; |
| 5520 | case DW_CFA_same_value: |
| 5521 | return "DW_CFA_same_value"; |
| 5522 | case DW_CFA_register: |
| 5523 | return "DW_CFA_register"; |
| 5524 | case DW_CFA_remember_state: |
| 5525 | return "DW_CFA_remember_state"; |
| 5526 | case DW_CFA_restore_state: |
| 5527 | return "DW_CFA_restore_state"; |
| 5528 | case DW_CFA_def_cfa: |
| 5529 | return "DW_CFA_def_cfa"; |
| 5530 | case DW_CFA_def_cfa_register: |
| 5531 | return "DW_CFA_def_cfa_register"; |
| 5532 | case DW_CFA_def_cfa_offset: |
| 5533 | return "DW_CFA_def_cfa_offset"; |
| 5534 | /* SGI/MIPS specific */ |
| 5535 | case DW_CFA_MIPS_advance_loc8: |
| 5536 | return "DW_CFA_MIPS_advance_loc8"; |
| 5537 | default: |
| 5538 | return "DW_CFA_<unknown>"; |
| 5539 | } |
| 5540 | } |
| 5541 | #endif |
| 5542 | |
| 5543 | static void |
| 5544 | dump_die (struct die_info *die) |
| 5545 | { |
| 5546 | unsigned int i; |
| 5547 | |
| 5548 | fprintf (stderr, "Die: %s (abbrev = %d, offset = %d)\n", |
| 5549 | dwarf_tag_name (die->tag), die->abbrev, die->offset); |
| 5550 | fprintf (stderr, "\thas children: %s\n", |
| 5551 | dwarf_bool_name (die->has_children)); |
| 5552 | |
| 5553 | fprintf (stderr, "\tattributes:\n"); |
| 5554 | for (i = 0; i < die->num_attrs; ++i) |
| 5555 | { |
| 5556 | fprintf (stderr, "\t\t%s (%s) ", |
| 5557 | dwarf_attr_name (die->attrs[i].name), |
| 5558 | dwarf_form_name (die->attrs[i].form)); |
| 5559 | switch (die->attrs[i].form) |
| 5560 | { |
| 5561 | case DW_FORM_ref_addr: |
| 5562 | case DW_FORM_addr: |
| 5563 | fprintf (stderr, "address: "); |
| 5564 | print_address_numeric (DW_ADDR (&die->attrs[i]), 1, gdb_stderr); |
| 5565 | break; |
| 5566 | case DW_FORM_block2: |
| 5567 | case DW_FORM_block4: |
| 5568 | case DW_FORM_block: |
| 5569 | case DW_FORM_block1: |
| 5570 | fprintf (stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size); |
| 5571 | break; |
| 5572 | case DW_FORM_data1: |
| 5573 | case DW_FORM_data2: |
| 5574 | case DW_FORM_data4: |
| 5575 | case DW_FORM_data8: |
| 5576 | case DW_FORM_ref1: |
| 5577 | case DW_FORM_ref2: |
| 5578 | case DW_FORM_ref4: |
| 5579 | case DW_FORM_udata: |
| 5580 | case DW_FORM_sdata: |
| 5581 | fprintf (stderr, "constant: %ld", DW_UNSND (&die->attrs[i])); |
| 5582 | break; |
| 5583 | case DW_FORM_string: |
| 5584 | fprintf (stderr, "string: \"%s\"", |
| 5585 | DW_STRING (&die->attrs[i]) |
| 5586 | ? DW_STRING (&die->attrs[i]) : ""); |
| 5587 | break; |
| 5588 | case DW_FORM_flag: |
| 5589 | if (DW_UNSND (&die->attrs[i])) |
| 5590 | fprintf (stderr, "flag: TRUE"); |
| 5591 | else |
| 5592 | fprintf (stderr, "flag: FALSE"); |
| 5593 | break; |
| 5594 | case DW_FORM_strp: /* we do not support separate string |
| 5595 | section yet */ |
| 5596 | case DW_FORM_indirect: /* we do not handle indirect yet */ |
| 5597 | default: |
| 5598 | fprintf (stderr, "unsupported attribute form: %d.", |
| 5599 | die->attrs[i].form); |
| 5600 | } |
| 5601 | fprintf (stderr, "\n"); |
| 5602 | } |
| 5603 | } |
| 5604 | |
| 5605 | static void |
| 5606 | dump_die_list (struct die_info *die) |
| 5607 | { |
| 5608 | while (die) |
| 5609 | { |
| 5610 | dump_die (die); |
| 5611 | die = die->next; |
| 5612 | } |
| 5613 | } |
| 5614 | |
| 5615 | static void |
| 5616 | store_in_ref_table (unsigned int offset, struct die_info *die) |
| 5617 | { |
| 5618 | int h; |
| 5619 | struct die_info *old; |
| 5620 | |
| 5621 | h = (offset % REF_HASH_SIZE); |
| 5622 | old = die_ref_table[h]; |
| 5623 | die->next_ref = old; |
| 5624 | die_ref_table[h] = die; |
| 5625 | } |
| 5626 | |
| 5627 | |
| 5628 | static void |
| 5629 | dwarf2_empty_hash_tables (void) |
| 5630 | { |
| 5631 | memset (die_ref_table, 0, sizeof (die_ref_table)); |
| 5632 | } |
| 5633 | |
| 5634 | static unsigned int |
| 5635 | dwarf2_get_ref_die_offset (struct attribute *attr) |
| 5636 | { |
| 5637 | unsigned int result = 0; |
| 5638 | |
| 5639 | switch (attr->form) |
| 5640 | { |
| 5641 | case DW_FORM_ref_addr: |
| 5642 | result = DW_ADDR (attr); |
| 5643 | break; |
| 5644 | case DW_FORM_ref1: |
| 5645 | case DW_FORM_ref2: |
| 5646 | case DW_FORM_ref4: |
| 5647 | case DW_FORM_ref8: |
| 5648 | case DW_FORM_ref_udata: |
| 5649 | result = cu_header_offset + DW_UNSND (attr); |
| 5650 | break; |
| 5651 | default: |
| 5652 | complain (&dwarf2_unsupported_die_ref_attr, dwarf_form_name (attr->form)); |
| 5653 | } |
| 5654 | return result; |
| 5655 | } |
| 5656 | |
| 5657 | static struct die_info * |
| 5658 | follow_die_ref (unsigned int offset) |
| 5659 | { |
| 5660 | struct die_info *die; |
| 5661 | int h; |
| 5662 | |
| 5663 | h = (offset % REF_HASH_SIZE); |
| 5664 | die = die_ref_table[h]; |
| 5665 | while (die) |
| 5666 | { |
| 5667 | if (die->offset == offset) |
| 5668 | { |
| 5669 | return die; |
| 5670 | } |
| 5671 | die = die->next_ref; |
| 5672 | } |
| 5673 | return NULL; |
| 5674 | } |
| 5675 | |
| 5676 | static struct type * |
| 5677 | dwarf2_fundamental_type (struct objfile *objfile, int typeid) |
| 5678 | { |
| 5679 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) |
| 5680 | { |
| 5681 | error ("Dwarf Error: internal error - invalid fundamental type id %d.", |
| 5682 | typeid); |
| 5683 | } |
| 5684 | |
| 5685 | /* Look for this particular type in the fundamental type vector. If |
| 5686 | one is not found, create and install one appropriate for the |
| 5687 | current language and the current target machine. */ |
| 5688 | |
| 5689 | if (ftypes[typeid] == NULL) |
| 5690 | { |
| 5691 | ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid); |
| 5692 | } |
| 5693 | |
| 5694 | return (ftypes[typeid]); |
| 5695 | } |
| 5696 | |
| 5697 | /* Decode simple location descriptions. |
| 5698 | Given a pointer to a dwarf block that defines a location, compute |
| 5699 | the location and return the value. |
| 5700 | |
| 5701 | FIXME: This is a kludge until we figure out a better |
| 5702 | way to handle the location descriptions. |
| 5703 | Gdb's design does not mesh well with the DWARF2 notion of a location |
| 5704 | computing interpreter, which is a shame because the flexibility goes unused. |
| 5705 | FIXME: Implement more operations as necessary. |
| 5706 | |
| 5707 | A location description containing no operations indicates that the |
| 5708 | object is optimized out. The global optimized_out flag is set for |
| 5709 | those, the return value is meaningless. |
| 5710 | |
| 5711 | When the result is a register number, the global isreg flag is set, |
| 5712 | otherwise it is cleared. |
| 5713 | |
| 5714 | When the result is a base register offset, the global offreg flag is set |
| 5715 | and the register number is returned in basereg, otherwise it is cleared. |
| 5716 | |
| 5717 | When the DW_OP_fbreg operation is encountered without a corresponding |
| 5718 | DW_AT_frame_base attribute, the global islocal flag is set. |
| 5719 | Hopefully the machine dependent code knows how to set up a virtual |
| 5720 | frame pointer for the local references. |
| 5721 | |
| 5722 | Note that stack[0] is unused except as a default error return. |
| 5723 | Note that stack overflow is not yet handled. */ |
| 5724 | |
| 5725 | static CORE_ADDR |
| 5726 | decode_locdesc (struct dwarf_block *blk, struct objfile *objfile, |
| 5727 | const struct comp_unit_head *cu_header) |
| 5728 | { |
| 5729 | int i; |
| 5730 | int size = blk->size; |
| 5731 | char *data = blk->data; |
| 5732 | CORE_ADDR stack[64]; |
| 5733 | int stacki; |
| 5734 | unsigned int bytes_read, unsnd; |
| 5735 | unsigned char op; |
| 5736 | |
| 5737 | i = 0; |
| 5738 | stacki = 0; |
| 5739 | stack[stacki] = 0; |
| 5740 | isreg = 0; |
| 5741 | offreg = 0; |
| 5742 | isderef = 0; |
| 5743 | islocal = 0; |
| 5744 | optimized_out = 1; |
| 5745 | |
| 5746 | while (i < size) |
| 5747 | { |
| 5748 | optimized_out = 0; |
| 5749 | op = data[i++]; |
| 5750 | switch (op) |
| 5751 | { |
| 5752 | case DW_OP_reg0: |
| 5753 | case DW_OP_reg1: |
| 5754 | case DW_OP_reg2: |
| 5755 | case DW_OP_reg3: |
| 5756 | case DW_OP_reg4: |
| 5757 | case DW_OP_reg5: |
| 5758 | case DW_OP_reg6: |
| 5759 | case DW_OP_reg7: |
| 5760 | case DW_OP_reg8: |
| 5761 | case DW_OP_reg9: |
| 5762 | case DW_OP_reg10: |
| 5763 | case DW_OP_reg11: |
| 5764 | case DW_OP_reg12: |
| 5765 | case DW_OP_reg13: |
| 5766 | case DW_OP_reg14: |
| 5767 | case DW_OP_reg15: |
| 5768 | case DW_OP_reg16: |
| 5769 | case DW_OP_reg17: |
| 5770 | case DW_OP_reg18: |
| 5771 | case DW_OP_reg19: |
| 5772 | case DW_OP_reg20: |
| 5773 | case DW_OP_reg21: |
| 5774 | case DW_OP_reg22: |
| 5775 | case DW_OP_reg23: |
| 5776 | case DW_OP_reg24: |
| 5777 | case DW_OP_reg25: |
| 5778 | case DW_OP_reg26: |
| 5779 | case DW_OP_reg27: |
| 5780 | case DW_OP_reg28: |
| 5781 | case DW_OP_reg29: |
| 5782 | case DW_OP_reg30: |
| 5783 | case DW_OP_reg31: |
| 5784 | isreg = 1; |
| 5785 | stack[++stacki] = op - DW_OP_reg0; |
| 5786 | break; |
| 5787 | |
| 5788 | case DW_OP_regx: |
| 5789 | isreg = 1; |
| 5790 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); |
| 5791 | i += bytes_read; |
| 5792 | #if defined(HARRIS_TARGET) && defined(_M88K) |
| 5793 | /* The Harris 88110 gdb ports have long kept their special reg |
| 5794 | numbers between their gp-regs and their x-regs. This is |
| 5795 | not how our dwarf is generated. Punt. */ |
| 5796 | unsnd += 6; |
| 5797 | #endif |
| 5798 | stack[++stacki] = unsnd; |
| 5799 | break; |
| 5800 | |
| 5801 | case DW_OP_breg0: |
| 5802 | case DW_OP_breg1: |
| 5803 | case DW_OP_breg2: |
| 5804 | case DW_OP_breg3: |
| 5805 | case DW_OP_breg4: |
| 5806 | case DW_OP_breg5: |
| 5807 | case DW_OP_breg6: |
| 5808 | case DW_OP_breg7: |
| 5809 | case DW_OP_breg8: |
| 5810 | case DW_OP_breg9: |
| 5811 | case DW_OP_breg10: |
| 5812 | case DW_OP_breg11: |
| 5813 | case DW_OP_breg12: |
| 5814 | case DW_OP_breg13: |
| 5815 | case DW_OP_breg14: |
| 5816 | case DW_OP_breg15: |
| 5817 | case DW_OP_breg16: |
| 5818 | case DW_OP_breg17: |
| 5819 | case DW_OP_breg18: |
| 5820 | case DW_OP_breg19: |
| 5821 | case DW_OP_breg20: |
| 5822 | case DW_OP_breg21: |
| 5823 | case DW_OP_breg22: |
| 5824 | case DW_OP_breg23: |
| 5825 | case DW_OP_breg24: |
| 5826 | case DW_OP_breg25: |
| 5827 | case DW_OP_breg26: |
| 5828 | case DW_OP_breg27: |
| 5829 | case DW_OP_breg28: |
| 5830 | case DW_OP_breg29: |
| 5831 | case DW_OP_breg30: |
| 5832 | case DW_OP_breg31: |
| 5833 | offreg = 1; |
| 5834 | basereg = op - DW_OP_breg0; |
| 5835 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); |
| 5836 | i += bytes_read; |
| 5837 | break; |
| 5838 | |
| 5839 | case DW_OP_bregx: |
| 5840 | offreg = 1; |
| 5841 | basereg = read_unsigned_leb128 (NULL, (data + i), &bytes_read); |
| 5842 | i += bytes_read; |
| 5843 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); |
| 5844 | i += bytes_read; |
| 5845 | break; |
| 5846 | |
| 5847 | case DW_OP_fbreg: |
| 5848 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); |
| 5849 | i += bytes_read; |
| 5850 | if (frame_base_reg >= 0) |
| 5851 | { |
| 5852 | offreg = 1; |
| 5853 | basereg = frame_base_reg; |
| 5854 | stack[stacki] += frame_base_offset; |
| 5855 | } |
| 5856 | else |
| 5857 | { |
| 5858 | complain (&dwarf2_missing_at_frame_base); |
| 5859 | islocal = 1; |
| 5860 | } |
| 5861 | break; |
| 5862 | |
| 5863 | case DW_OP_addr: |
| 5864 | stack[++stacki] = read_address (objfile->obfd, &data[i], |
| 5865 | cu_header, &bytes_read); |
| 5866 | i += bytes_read; |
| 5867 | break; |
| 5868 | |
| 5869 | case DW_OP_const1u: |
| 5870 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); |
| 5871 | i += 1; |
| 5872 | break; |
| 5873 | |
| 5874 | case DW_OP_const1s: |
| 5875 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); |
| 5876 | i += 1; |
| 5877 | break; |
| 5878 | |
| 5879 | case DW_OP_const2u: |
| 5880 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); |
| 5881 | i += 2; |
| 5882 | break; |
| 5883 | |
| 5884 | case DW_OP_const2s: |
| 5885 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); |
| 5886 | i += 2; |
| 5887 | break; |
| 5888 | |
| 5889 | case DW_OP_const4u: |
| 5890 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); |
| 5891 | i += 4; |
| 5892 | break; |
| 5893 | |
| 5894 | case DW_OP_const4s: |
| 5895 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); |
| 5896 | i += 4; |
| 5897 | break; |
| 5898 | |
| 5899 | case DW_OP_constu: |
| 5900 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), |
| 5901 | &bytes_read); |
| 5902 | i += bytes_read; |
| 5903 | break; |
| 5904 | |
| 5905 | case DW_OP_consts: |
| 5906 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); |
| 5907 | i += bytes_read; |
| 5908 | break; |
| 5909 | |
| 5910 | case DW_OP_plus: |
| 5911 | stack[stacki - 1] += stack[stacki]; |
| 5912 | stacki--; |
| 5913 | break; |
| 5914 | |
| 5915 | case DW_OP_plus_uconst: |
| 5916 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read); |
| 5917 | i += bytes_read; |
| 5918 | break; |
| 5919 | |
| 5920 | case DW_OP_minus: |
| 5921 | stack[stacki - 1] = stack[stacki] - stack[stacki - 1]; |
| 5922 | stacki--; |
| 5923 | break; |
| 5924 | |
| 5925 | case DW_OP_deref: |
| 5926 | isderef = 1; |
| 5927 | /* If we're not the last op, then we definitely can't encode |
| 5928 | this using GDB's address_class enum. */ |
| 5929 | if (i < size) |
| 5930 | complain (&dwarf2_complex_location_expr); |
| 5931 | break; |
| 5932 | |
| 5933 | default: |
| 5934 | complain (&dwarf2_unsupported_stack_op, dwarf_stack_op_name (op)); |
| 5935 | return (stack[stacki]); |
| 5936 | } |
| 5937 | } |
| 5938 | return (stack[stacki]); |
| 5939 | } |
| 5940 | |
| 5941 | /* memory allocation interface */ |
| 5942 | |
| 5943 | /* ARGSUSED */ |
| 5944 | static void |
| 5945 | dwarf2_free_tmp_obstack (PTR ignore) |
| 5946 | { |
| 5947 | obstack_free (&dwarf2_tmp_obstack, NULL); |
| 5948 | } |
| 5949 | |
| 5950 | static struct dwarf_block * |
| 5951 | dwarf_alloc_block (void) |
| 5952 | { |
| 5953 | struct dwarf_block *blk; |
| 5954 | |
| 5955 | blk = (struct dwarf_block *) |
| 5956 | obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct dwarf_block)); |
| 5957 | return (blk); |
| 5958 | } |
| 5959 | |
| 5960 | static struct abbrev_info * |
| 5961 | dwarf_alloc_abbrev (void) |
| 5962 | { |
| 5963 | struct abbrev_info *abbrev; |
| 5964 | |
| 5965 | abbrev = (struct abbrev_info *) xmalloc (sizeof (struct abbrev_info)); |
| 5966 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
| 5967 | return (abbrev); |
| 5968 | } |
| 5969 | |
| 5970 | static struct die_info * |
| 5971 | dwarf_alloc_die (void) |
| 5972 | { |
| 5973 | struct die_info *die; |
| 5974 | |
| 5975 | die = (struct die_info *) xmalloc (sizeof (struct die_info)); |
| 5976 | memset (die, 0, sizeof (struct die_info)); |
| 5977 | return (die); |
| 5978 | } |