Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* DWARF 2 support. |
f5a3e38a | 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 |
7898deda | 3 | Free Software Foundation, Inc. |
252b5132 RH |
4 | |
5 | Adapted from gdb/dwarf2read.c by Gavin Koch of Cygnus Solutions | |
6 | (gavin@cygnus.com). | |
7 | ||
8 | From the dwarf2read.c header: | |
9 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
10 | Inc. with support from Florida State University (under contract | |
11 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
12 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
13 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
14 | support in dwarfread.c | |
15 | ||
e2f6d277 | 16 | This file is part of BFD. |
252b5132 | 17 | |
e2f6d277 NC |
18 | This program is free software; you can redistribute it and/or modify |
19 | it under the terms of the GNU General Public License as published by | |
20 | the Free Software Foundation; either version 2 of the License, or (at | |
21 | your option) any later version. | |
252b5132 | 22 | |
e2f6d277 NC |
23 | This program is distributed in the hope that it will be useful, but |
24 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
26 | General Public License for more details. | |
252b5132 | 27 | |
e2f6d277 NC |
28 | You should have received a copy of the GNU General Public License |
29 | along with this program; if not, write to the Free Software | |
30 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
252b5132 RH |
31 | |
32 | #include "bfd.h" | |
33 | #include "sysdep.h" | |
34 | #include "libiberty.h" | |
35 | #include "libbfd.h" | |
36 | #include "elf-bfd.h" | |
37 | #include "elf/dwarf2.h" | |
38 | ||
39 | /* The data in the .debug_line statement prologue looks like this. */ | |
a092b084 | 40 | |
252b5132 | 41 | struct line_head |
a092b084 | 42 | { |
d03ba2a1 | 43 | bfd_vma total_length; |
a092b084 | 44 | unsigned short version; |
f46c2da6 | 45 | bfd_vma prologue_length; |
a092b084 NC |
46 | unsigned char minimum_instruction_length; |
47 | unsigned char default_is_stmt; | |
48 | int line_base; | |
49 | unsigned char line_range; | |
50 | unsigned char opcode_base; | |
51 | unsigned char *standard_opcode_lengths; | |
52 | }; | |
53 | ||
54 | /* Attributes have a name and a value. */ | |
55 | ||
252b5132 | 56 | struct attribute |
a092b084 NC |
57 | { |
58 | enum dwarf_attribute name; | |
59 | enum dwarf_form form; | |
60 | union | |
252b5132 | 61 | { |
a092b084 NC |
62 | char *str; |
63 | struct dwarf_block *blk; | |
64 | unsigned int unsnd; | |
65 | int snd; | |
66 | bfd_vma addr; | |
67 | } | |
68 | u; | |
69 | }; | |
70 | ||
71 | /* Get at parts of an attribute structure. */ | |
252b5132 RH |
72 | |
73 | #define DW_STRING(attr) ((attr)->u.str) | |
74 | #define DW_UNSND(attr) ((attr)->u.unsnd) | |
75 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
76 | #define DW_SND(attr) ((attr)->u.snd) | |
77 | #define DW_ADDR(attr) ((attr)->u.addr) | |
78 | ||
98591c73 | 79 | /* Blocks are a bunch of untyped bytes. */ |
252b5132 | 80 | struct dwarf_block |
a092b084 NC |
81 | { |
82 | unsigned int size; | |
83 | char *data; | |
84 | }; | |
252b5132 | 85 | |
a092b084 NC |
86 | struct dwarf2_debug |
87 | { | |
88 | /* A list of all previously read comp_units. */ | |
252b5132 RH |
89 | struct comp_unit* all_comp_units; |
90 | ||
91 | /* The next unread compilation unit within the .debug_info section. | |
92 | Zero indicates that the .debug_info section has not been loaded | |
a092b084 | 93 | into a buffer yet. */ |
252b5132 RH |
94 | char* info_ptr; |
95 | ||
a092b084 | 96 | /* Pointer to the end of the .debug_info section memory buffer. */ |
252b5132 RH |
97 | char* info_ptr_end; |
98 | ||
f2363ce5 AO |
99 | /* Pointer to the section and address of the beginning of the |
100 | section. */ | |
101 | asection* sec; | |
102 | char* sec_info_ptr; | |
103 | ||
104 | /* Pointer to the symbol table. */ | |
105 | asymbol** syms; | |
106 | ||
a092b084 | 107 | /* Pointer to the .debug_abbrev section loaded into memory. */ |
252b5132 RH |
108 | char* dwarf_abbrev_buffer; |
109 | ||
a092b084 | 110 | /* Length of the loaded .debug_abbrev section. */ |
252b5132 | 111 | unsigned long dwarf_abbrev_size; |
69dd2e2d RH |
112 | |
113 | /* Buffer for decode_line_info. */ | |
114 | char *dwarf_line_buffer; | |
ccdb16fc JW |
115 | |
116 | /* Length of the loaded .debug_line section. */ | |
117 | unsigned long dwarf_line_size; | |
d03ba2a1 JJ |
118 | |
119 | /* Pointer to the .debug_str section loaded into memory. */ | |
120 | char* dwarf_str_buffer; | |
121 | ||
122 | /* Length of the loaded .debug_str section. */ | |
123 | unsigned long dwarf_str_size; | |
252b5132 RH |
124 | }; |
125 | ||
a092b084 NC |
126 | struct arange |
127 | { | |
f623be2b RH |
128 | struct arange *next; |
129 | bfd_vma low; | |
130 | bfd_vma high; | |
131 | }; | |
252b5132 | 132 | |
252b5132 | 133 | /* A minimal decoding of DWARF2 compilation units. We only decode |
a092b084 | 134 | what's needed to get to the line number information. */ |
252b5132 | 135 | |
a092b084 NC |
136 | struct comp_unit |
137 | { | |
138 | /* Chain the previously read compilation units. */ | |
252b5132 RH |
139 | struct comp_unit* next_unit; |
140 | ||
a092b084 | 141 | /* Keep the bdf convenient (for memory allocation). */ |
252b5132 RH |
142 | bfd* abfd; |
143 | ||
144 | /* The lowest and higest addresses contained in this compilation | |
a092b084 | 145 | unit as specified in the compilation unit header. */ |
f623be2b | 146 | struct arange arange; |
252b5132 | 147 | |
a092b084 | 148 | /* The DW_AT_name attribute (for error messages). */ |
252b5132 RH |
149 | char* name; |
150 | ||
a092b084 | 151 | /* The abbrev hash table. */ |
252b5132 RH |
152 | struct abbrev_info** abbrevs; |
153 | ||
a092b084 | 154 | /* Note that an error was found by comp_unit_find_nearest_line. */ |
252b5132 RH |
155 | int error; |
156 | ||
a092b084 | 157 | /* The DW_AT_comp_dir attribute. */ |
252b5132 RH |
158 | char* comp_dir; |
159 | ||
a092b084 | 160 | /* True if there is a line number table associated with this comp. unit. */ |
252b5132 | 161 | int stmtlist; |
98591c73 | 162 | |
a092b084 | 163 | /* The offset into .debug_line of the line number table. */ |
252b5132 RH |
164 | unsigned long line_offset; |
165 | ||
a092b084 | 166 | /* Pointer to the first child die for the comp unit. */ |
252b5132 RH |
167 | char *first_child_die_ptr; |
168 | ||
a092b084 | 169 | /* The end of the comp unit. */ |
252b5132 RH |
170 | char *end_ptr; |
171 | ||
a092b084 | 172 | /* The decoded line number, NULL if not yet decoded. */ |
252b5132 RH |
173 | struct line_info_table* line_table; |
174 | ||
a092b084 | 175 | /* A list of the functions found in this comp. unit. */ |
98591c73 | 176 | struct funcinfo* function_table; |
252b5132 | 177 | |
d03ba2a1 JJ |
178 | /* Pointer to dwarf2_debug structure. */ |
179 | struct dwarf2_debug *stash; | |
180 | ||
a092b084 | 181 | /* Address size for this unit - from unit header. */ |
252b5132 | 182 | unsigned char addr_size; |
d03ba2a1 JJ |
183 | |
184 | /* Offset size for this unit - from unit header. */ | |
185 | unsigned char offset_size; | |
252b5132 RH |
186 | }; |
187 | ||
a7b97311 AM |
188 | /* This data structure holds the information of an abbrev. */ |
189 | struct abbrev_info | |
190 | { | |
191 | unsigned int number; /* Number identifying abbrev. */ | |
192 | enum dwarf_tag tag; /* DWARF tag. */ | |
193 | int has_children; /* Boolean. */ | |
194 | unsigned int num_attrs; /* Number of attributes. */ | |
195 | struct attr_abbrev *attrs; /* An array of attribute descriptions. */ | |
196 | struct abbrev_info *next; /* Next in chain. */ | |
197 | }; | |
198 | ||
199 | struct attr_abbrev | |
200 | { | |
201 | enum dwarf_attribute name; | |
202 | enum dwarf_form form; | |
203 | }; | |
204 | ||
205 | #ifndef ABBREV_HASH_SIZE | |
206 | #define ABBREV_HASH_SIZE 121 | |
207 | #endif | |
208 | #ifndef ATTR_ALLOC_CHUNK | |
209 | #define ATTR_ALLOC_CHUNK 4 | |
210 | #endif | |
211 | ||
212 | static unsigned int read_1_byte PARAMS ((bfd *, char *)); | |
213 | static int read_1_signed_byte PARAMS ((bfd *, char *)); | |
214 | static unsigned int read_2_bytes PARAMS ((bfd *, char *)); | |
215 | static unsigned int read_4_bytes PARAMS ((bfd *, char *)); | |
d03ba2a1 | 216 | static bfd_vma read_8_bytes PARAMS ((bfd *, char *)); |
a7b97311 AM |
217 | static char *read_n_bytes PARAMS ((bfd *, char *, unsigned int)); |
218 | static char *read_string PARAMS ((bfd *, char *, unsigned int *)); | |
d03ba2a1 | 219 | static char *read_indirect_string PARAMS ((struct comp_unit *, char *, unsigned int *)); |
a7b97311 AM |
220 | static unsigned int read_unsigned_leb128 |
221 | PARAMS ((bfd *, char *, unsigned int *)); | |
222 | static int read_signed_leb128 | |
223 | PARAMS ((bfd *, char *, unsigned int *)); | |
224 | static bfd_vma read_address PARAMS ((struct comp_unit *, char *)); | |
225 | static struct abbrev_info *lookup_abbrev | |
226 | PARAMS ((unsigned int, struct abbrev_info **)); | |
227 | static struct abbrev_info **read_abbrevs | |
f46c2da6 | 228 | PARAMS ((bfd *, bfd_vma, struct dwarf2_debug *)); |
a7b97311 AM |
229 | static char *read_attribute |
230 | PARAMS ((struct attribute *, struct attr_abbrev *, | |
231 | struct comp_unit *, char *)); | |
cf716c56 RH |
232 | static char *read_attribute_value |
233 | PARAMS ((struct attribute *, unsigned, | |
234 | struct comp_unit *, char *)); | |
a7b97311 AM |
235 | static void add_line_info |
236 | PARAMS ((struct line_info_table *, bfd_vma, char *, | |
237 | unsigned int, unsigned int, int)); | |
238 | static char *concat_filename PARAMS ((struct line_info_table *, unsigned int)); | |
239 | static void arange_add PARAMS ((struct comp_unit *, bfd_vma, bfd_vma)); | |
240 | static struct line_info_table *decode_line_info | |
241 | PARAMS ((struct comp_unit *, struct dwarf2_debug *)); | |
242 | static boolean lookup_address_in_line_info_table | |
1ee24f27 DJ |
243 | PARAMS ((struct line_info_table *, bfd_vma, struct funcinfo *, |
244 | const char **, unsigned int *)); | |
a7b97311 | 245 | static boolean lookup_address_in_function_table |
1ee24f27 | 246 | PARAMS ((struct funcinfo *, bfd_vma, struct funcinfo **, const char **)); |
a7b97311 AM |
247 | static boolean scan_unit_for_functions PARAMS ((struct comp_unit *)); |
248 | static bfd_vma find_rela_addend | |
249 | PARAMS ((bfd *, asection *, bfd_size_type, asymbol**)); | |
250 | static struct comp_unit *parse_comp_unit | |
251 | PARAMS ((bfd *, struct dwarf2_debug *, bfd_vma, unsigned int)); | |
252 | static boolean comp_unit_contains_address | |
253 | PARAMS ((struct comp_unit *, bfd_vma)); | |
254 | static boolean comp_unit_find_nearest_line | |
255 | PARAMS ((struct comp_unit *, bfd_vma, const char **, const char **, | |
256 | unsigned int *, struct dwarf2_debug *)); | |
257 | static asection *find_debug_info PARAMS ((bfd *, asection *)); | |
258 | ||
98591c73 KH |
259 | /* VERBATIM |
260 | The following function up to the END VERBATIM mark are | |
a092b084 | 261 | copied directly from dwarf2read.c. */ |
252b5132 | 262 | |
a092b084 | 263 | /* Read dwarf information from a buffer. */ |
252b5132 RH |
264 | |
265 | static unsigned int | |
266 | read_1_byte (abfd, buf) | |
7442e600 | 267 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
268 | char *buf; |
269 | { | |
270 | return bfd_get_8 (abfd, (bfd_byte *) buf); | |
271 | } | |
272 | ||
273 | static int | |
274 | read_1_signed_byte (abfd, buf) | |
7442e600 | 275 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
276 | char *buf; |
277 | { | |
278 | return bfd_get_signed_8 (abfd, (bfd_byte *) buf); | |
279 | } | |
280 | ||
281 | static unsigned int | |
282 | read_2_bytes (abfd, buf) | |
283 | bfd *abfd; | |
284 | char *buf; | |
285 | { | |
286 | return bfd_get_16 (abfd, (bfd_byte *) buf); | |
287 | } | |
288 | ||
a092b084 | 289 | #if 0 /* This is not used. */ |
252b5132 RH |
290 | |
291 | static int | |
292 | read_2_signed_bytes (abfd, buf) | |
293 | bfd *abfd; | |
294 | char *buf; | |
295 | { | |
296 | return bfd_get_signed_16 (abfd, (bfd_byte *) buf); | |
297 | } | |
298 | ||
299 | #endif | |
300 | ||
301 | static unsigned int | |
302 | read_4_bytes (abfd, buf) | |
303 | bfd *abfd; | |
304 | char *buf; | |
305 | { | |
306 | return bfd_get_32 (abfd, (bfd_byte *) buf); | |
307 | } | |
308 | ||
a092b084 | 309 | #if 0 /* This is not used. */ |
252b5132 RH |
310 | |
311 | static int | |
312 | read_4_signed_bytes (abfd, buf) | |
313 | bfd *abfd; | |
314 | char *buf; | |
315 | { | |
316 | return bfd_get_signed_32 (abfd, (bfd_byte *) buf); | |
317 | } | |
318 | ||
319 | #endif | |
320 | ||
d03ba2a1 | 321 | static bfd_vma |
252b5132 RH |
322 | read_8_bytes (abfd, buf) |
323 | bfd *abfd; | |
324 | char *buf; | |
325 | { | |
326 | return bfd_get_64 (abfd, (bfd_byte *) buf); | |
327 | } | |
328 | ||
329 | static char * | |
330 | read_n_bytes (abfd, buf, size) | |
7442e600 | 331 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 | 332 | char *buf; |
7442e600 | 333 | unsigned int size ATTRIBUTE_UNUSED; |
252b5132 RH |
334 | { |
335 | /* If the size of a host char is 8 bits, we can return a pointer | |
336 | to the buffer, otherwise we have to copy the data to a buffer | |
337 | allocated on the temporary obstack. */ | |
338 | return buf; | |
339 | } | |
340 | ||
341 | static char * | |
342 | read_string (abfd, buf, bytes_read_ptr) | |
7442e600 | 343 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
344 | char *buf; |
345 | unsigned int *bytes_read_ptr; | |
346 | { | |
d03ba2a1 | 347 | /* Return a pointer to the embedded string. */ |
252b5132 RH |
348 | if (*buf == '\0') |
349 | { | |
350 | *bytes_read_ptr = 1; | |
351 | return NULL; | |
352 | } | |
98591c73 | 353 | |
252b5132 RH |
354 | *bytes_read_ptr = strlen (buf) + 1; |
355 | return buf; | |
356 | } | |
357 | ||
d03ba2a1 JJ |
358 | static char * |
359 | read_indirect_string (unit, buf, bytes_read_ptr) | |
360 | struct comp_unit* unit; | |
361 | char *buf; | |
362 | unsigned int *bytes_read_ptr; | |
363 | { | |
364 | bfd_vma offset; | |
365 | struct dwarf2_debug *stash = unit->stash; | |
366 | ||
367 | if (unit->offset_size == 4) | |
368 | offset = read_4_bytes (unit->abfd, buf); | |
369 | else | |
370 | offset = read_8_bytes (unit->abfd, buf); | |
371 | *bytes_read_ptr = unit->offset_size; | |
372 | ||
373 | if (! stash->dwarf_str_buffer) | |
374 | { | |
375 | asection *msec; | |
376 | bfd *abfd = unit->abfd; | |
377 | ||
378 | msec = bfd_get_section_by_name (abfd, ".debug_str"); | |
379 | if (! msec) | |
380 | { | |
381 | (*_bfd_error_handler) | |
382 | (_("Dwarf Error: Can't find .debug_str section.")); | |
383 | bfd_set_error (bfd_error_bad_value); | |
384 | return NULL; | |
385 | } | |
386 | ||
387 | stash->dwarf_str_size = msec->_raw_size; | |
388 | stash->dwarf_str_buffer = (char*) bfd_alloc (abfd, msec->_raw_size); | |
389 | if (! stash->dwarf_abbrev_buffer) | |
390 | return NULL; | |
391 | ||
392 | if (! bfd_get_section_contents (abfd, msec, stash->dwarf_str_buffer, | |
393 | (bfd_vma) 0, msec->_raw_size)) | |
394 | return NULL; | |
395 | } | |
396 | ||
397 | if (offset >= stash->dwarf_str_size) | |
398 | { | |
f46c2da6 AM |
399 | (*_bfd_error_handler) (_("Dwarf Error: DW_FORM_strp offset (%lu) greater than or equal to .debug_str size (%lu)."), |
400 | (unsigned long) offset, stash->dwarf_str_size); | |
d03ba2a1 JJ |
401 | bfd_set_error (bfd_error_bad_value); |
402 | return NULL; | |
403 | } | |
404 | ||
405 | buf = stash->dwarf_str_buffer + offset; | |
406 | if (*buf == '\0') | |
407 | return NULL; | |
408 | return buf; | |
409 | } | |
410 | ||
252b5132 RH |
411 | static unsigned int |
412 | read_unsigned_leb128 (abfd, buf, bytes_read_ptr) | |
7442e600 | 413 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
414 | char *buf; |
415 | unsigned int *bytes_read_ptr; | |
416 | { | |
417 | unsigned int result; | |
418 | unsigned int num_read; | |
419 | int shift; | |
420 | unsigned char byte; | |
421 | ||
422 | result = 0; | |
423 | shift = 0; | |
424 | num_read = 0; | |
98591c73 | 425 | |
252b5132 RH |
426 | do |
427 | { | |
428 | byte = bfd_get_8 (abfd, (bfd_byte *) buf); | |
429 | buf ++; | |
430 | num_read ++; | |
431 | result |= ((byte & 0x7f) << shift); | |
432 | shift += 7; | |
433 | } | |
434 | while (byte & 0x80); | |
98591c73 | 435 | |
252b5132 | 436 | * bytes_read_ptr = num_read; |
98591c73 | 437 | |
252b5132 RH |
438 | return result; |
439 | } | |
440 | ||
441 | static int | |
442 | read_signed_leb128 (abfd, buf, bytes_read_ptr) | |
7442e600 ILT |
443 | bfd *abfd ATTRIBUTE_UNUSED; |
444 | char *buf; | |
252b5132 RH |
445 | unsigned int * bytes_read_ptr; |
446 | { | |
447 | int result; | |
448 | int shift; | |
449 | int num_read; | |
450 | unsigned char byte; | |
451 | ||
452 | result = 0; | |
453 | shift = 0; | |
454 | num_read = 0; | |
455 | ||
456 | do | |
457 | { | |
458 | byte = bfd_get_8 (abfd, (bfd_byte *) buf); | |
459 | buf ++; | |
460 | num_read ++; | |
461 | result |= ((byte & 0x7f) << shift); | |
462 | shift += 7; | |
463 | } | |
464 | while (byte & 0x80); | |
98591c73 | 465 | |
252b5132 RH |
466 | if ((shift < 32) && (byte & 0x40)) |
467 | result |= -(1 << shift); | |
468 | ||
469 | * bytes_read_ptr = num_read; | |
98591c73 | 470 | |
252b5132 RH |
471 | return result; |
472 | } | |
473 | ||
474 | /* END VERBATIM */ | |
475 | ||
476 | static bfd_vma | |
477 | read_address (unit, buf) | |
478 | struct comp_unit* unit; | |
479 | char *buf; | |
480 | { | |
ecb651f0 | 481 | switch (unit->addr_size) |
252b5132 | 482 | { |
ecb651f0 NC |
483 | case 8: |
484 | return bfd_get_64 (unit->abfd, (bfd_byte *) buf); | |
485 | case 4: | |
486 | return bfd_get_32 (unit->abfd, (bfd_byte *) buf); | |
487 | case 2: | |
488 | return bfd_get_16 (unit->abfd, (bfd_byte *) buf); | |
489 | default: | |
490 | abort (); | |
252b5132 | 491 | } |
252b5132 RH |
492 | } |
493 | ||
252b5132 RH |
494 | /* Lookup an abbrev_info structure in the abbrev hash table. */ |
495 | ||
496 | static struct abbrev_info * | |
497 | lookup_abbrev (number,abbrevs) | |
498 | unsigned int number; | |
499 | struct abbrev_info **abbrevs; | |
500 | { | |
501 | unsigned int hash_number; | |
502 | struct abbrev_info *abbrev; | |
503 | ||
504 | hash_number = number % ABBREV_HASH_SIZE; | |
505 | abbrev = abbrevs[hash_number]; | |
506 | ||
507 | while (abbrev) | |
508 | { | |
509 | if (abbrev->number == number) | |
510 | return abbrev; | |
511 | else | |
512 | abbrev = abbrev->next; | |
513 | } | |
98591c73 | 514 | |
252b5132 RH |
515 | return NULL; |
516 | } | |
517 | ||
518 | /* In DWARF version 2, the description of the debugging information is | |
519 | stored in a separate .debug_abbrev section. Before we read any | |
520 | dies from a section we read in all abbreviations and install them | |
521 | in a hash table. */ | |
522 | ||
523 | static struct abbrev_info** | |
51db3708 | 524 | read_abbrevs (abfd, offset, stash) |
252b5132 | 525 | bfd * abfd; |
f46c2da6 | 526 | bfd_vma offset; |
51db3708 | 527 | struct dwarf2_debug *stash; |
252b5132 RH |
528 | { |
529 | struct abbrev_info **abbrevs; | |
530 | char *abbrev_ptr; | |
531 | struct abbrev_info *cur_abbrev; | |
532 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
533 | unsigned int abbrev_form, hash_number; | |
dc810e39 | 534 | bfd_size_type amt; |
252b5132 RH |
535 | |
536 | if (! stash->dwarf_abbrev_buffer) | |
537 | { | |
538 | asection *msec; | |
539 | ||
540 | msec = bfd_get_section_by_name (abfd, ".debug_abbrev"); | |
541 | if (! msec) | |
542 | { | |
543 | (*_bfd_error_handler) (_("Dwarf Error: Can't find .debug_abbrev section.")); | |
544 | bfd_set_error (bfd_error_bad_value); | |
545 | return 0; | |
546 | } | |
98591c73 | 547 | |
67d83c76 | 548 | stash->dwarf_abbrev_size = msec->_raw_size; |
dc810e39 | 549 | stash->dwarf_abbrev_buffer = (char*) bfd_alloc (abfd, msec->_raw_size); |
252b5132 RH |
550 | if (! stash->dwarf_abbrev_buffer) |
551 | return 0; | |
98591c73 | 552 | |
dc810e39 AM |
553 | if (! bfd_get_section_contents (abfd, msec, stash->dwarf_abbrev_buffer, |
554 | (bfd_vma) 0, msec->_raw_size)) | |
252b5132 RH |
555 | return 0; |
556 | } | |
557 | ||
f5198f61 | 558 | if (offset >= stash->dwarf_abbrev_size) |
252b5132 | 559 | { |
f46c2da6 AM |
560 | (*_bfd_error_handler) (_("Dwarf Error: Abbrev offset (%lu) greater than or equal to .debug_abbrev size (%lu)."), |
561 | (unsigned long) offset, stash->dwarf_abbrev_size); | |
252b5132 RH |
562 | bfd_set_error (bfd_error_bad_value); |
563 | return 0; | |
564 | } | |
565 | ||
dc810e39 AM |
566 | amt = sizeof (struct abbrev_info*) * ABBREV_HASH_SIZE; |
567 | abbrevs = (struct abbrev_info**) bfd_zalloc (abfd, amt); | |
252b5132 RH |
568 | |
569 | abbrev_ptr = stash->dwarf_abbrev_buffer + offset; | |
570 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
571 | abbrev_ptr += bytes_read; | |
572 | ||
a092b084 | 573 | /* Loop until we reach an abbrev number of 0. */ |
252b5132 RH |
574 | while (abbrev_number) |
575 | { | |
dc810e39 AM |
576 | amt = sizeof (struct abbrev_info); |
577 | cur_abbrev = (struct abbrev_info *) bfd_zalloc (abfd, amt); | |
252b5132 | 578 | |
a092b084 | 579 | /* Read in abbrev header. */ |
252b5132 RH |
580 | cur_abbrev->number = abbrev_number; |
581 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
582 | abbrev_ptr += bytes_read; | |
583 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
584 | abbrev_ptr += 1; | |
585 | ||
a092b084 | 586 | /* Now read in declarations. */ |
252b5132 RH |
587 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
588 | abbrev_ptr += bytes_read; | |
589 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
590 | abbrev_ptr += bytes_read; | |
98591c73 | 591 | |
252b5132 RH |
592 | while (abbrev_name) |
593 | { | |
594 | if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0) | |
595 | { | |
dc810e39 AM |
596 | amt = cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK; |
597 | amt *= sizeof (struct attr_abbrev); | |
598 | cur_abbrev->attrs = ((struct attr_abbrev *) | |
599 | bfd_realloc (cur_abbrev->attrs, amt)); | |
252b5132 RH |
600 | if (! cur_abbrev->attrs) |
601 | return 0; | |
602 | } | |
98591c73 | 603 | |
252b5132 RH |
604 | cur_abbrev->attrs[cur_abbrev->num_attrs].name = abbrev_name; |
605 | cur_abbrev->attrs[cur_abbrev->num_attrs++].form = abbrev_form; | |
606 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
607 | abbrev_ptr += bytes_read; | |
608 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
609 | abbrev_ptr += bytes_read; | |
610 | } | |
611 | ||
612 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
613 | cur_abbrev->next = abbrevs[hash_number]; | |
614 | abbrevs[hash_number] = cur_abbrev; | |
615 | ||
616 | /* Get next abbreviation. | |
617 | Under Irix6 the abbreviations for a compilation unit are not | |
618 | always properly terminated with an abbrev number of 0. | |
619 | Exit loop if we encounter an abbreviation which we have | |
620 | already read (which means we are about to read the abbreviations | |
621 | for the next compile unit) or if the end of the abbreviation | |
622 | table is reached. */ | |
623 | if ((unsigned int) (abbrev_ptr - stash->dwarf_abbrev_buffer) | |
624 | >= stash->dwarf_abbrev_size) | |
625 | break; | |
626 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
627 | abbrev_ptr += bytes_read; | |
628 | if (lookup_abbrev (abbrev_number,abbrevs) != NULL) | |
629 | break; | |
630 | } | |
631 | ||
632 | return abbrevs; | |
633 | } | |
634 | ||
cf716c56 | 635 | /* Read an attribute value described by an attribute form. */ |
252b5132 RH |
636 | |
637 | static char * | |
cf716c56 | 638 | read_attribute_value (attr, form, unit, info_ptr) |
252b5132 | 639 | struct attribute *attr; |
cf716c56 | 640 | unsigned form; |
252b5132 RH |
641 | struct comp_unit *unit; |
642 | char *info_ptr; | |
643 | { | |
644 | bfd *abfd = unit->abfd; | |
645 | unsigned int bytes_read; | |
646 | struct dwarf_block *blk; | |
dc810e39 | 647 | bfd_size_type amt; |
252b5132 | 648 | |
cf716c56 | 649 | attr->form = form; |
98591c73 | 650 | |
cf716c56 | 651 | switch (form) |
252b5132 RH |
652 | { |
653 | case DW_FORM_addr: | |
d03ba2a1 | 654 | /* FIXME: DWARF3 draft sais DW_FORM_ref_addr is offset_size. */ |
252b5132 RH |
655 | case DW_FORM_ref_addr: |
656 | DW_ADDR (attr) = read_address (unit, info_ptr); | |
657 | info_ptr += unit->addr_size; | |
658 | break; | |
659 | case DW_FORM_block2: | |
dc810e39 AM |
660 | amt = sizeof (struct dwarf_block); |
661 | blk = (struct dwarf_block *) bfd_alloc (abfd, amt); | |
252b5132 RH |
662 | blk->size = read_2_bytes (abfd, info_ptr); |
663 | info_ptr += 2; | |
664 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
665 | info_ptr += blk->size; | |
666 | DW_BLOCK (attr) = blk; | |
667 | break; | |
668 | case DW_FORM_block4: | |
dc810e39 AM |
669 | amt = sizeof (struct dwarf_block); |
670 | blk = (struct dwarf_block *) bfd_alloc (abfd, amt); | |
252b5132 RH |
671 | blk->size = read_4_bytes (abfd, info_ptr); |
672 | info_ptr += 4; | |
673 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
674 | info_ptr += blk->size; | |
675 | DW_BLOCK (attr) = blk; | |
676 | break; | |
677 | case DW_FORM_data2: | |
678 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
679 | info_ptr += 2; | |
680 | break; | |
681 | case DW_FORM_data4: | |
682 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
683 | info_ptr += 4; | |
684 | break; | |
685 | case DW_FORM_data8: | |
686 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
687 | info_ptr += 8; | |
688 | break; | |
689 | case DW_FORM_string: | |
690 | DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read); | |
691 | info_ptr += bytes_read; | |
692 | break; | |
d03ba2a1 JJ |
693 | case DW_FORM_strp: |
694 | DW_STRING (attr) = read_indirect_string (unit, info_ptr, &bytes_read); | |
695 | info_ptr += bytes_read; | |
696 | break; | |
252b5132 | 697 | case DW_FORM_block: |
dc810e39 AM |
698 | amt = sizeof (struct dwarf_block); |
699 | blk = (struct dwarf_block *) bfd_alloc (abfd, amt); | |
252b5132 RH |
700 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
701 | info_ptr += bytes_read; | |
702 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
703 | info_ptr += blk->size; | |
704 | DW_BLOCK (attr) = blk; | |
705 | break; | |
706 | case DW_FORM_block1: | |
dc810e39 AM |
707 | amt = sizeof (struct dwarf_block); |
708 | blk = (struct dwarf_block *) bfd_alloc (abfd, amt); | |
252b5132 RH |
709 | blk->size = read_1_byte (abfd, info_ptr); |
710 | info_ptr += 1; | |
711 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
712 | info_ptr += blk->size; | |
713 | DW_BLOCK (attr) = blk; | |
714 | break; | |
715 | case DW_FORM_data1: | |
716 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
717 | info_ptr += 1; | |
718 | break; | |
719 | case DW_FORM_flag: | |
720 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
721 | info_ptr += 1; | |
722 | break; | |
723 | case DW_FORM_sdata: | |
724 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
725 | info_ptr += bytes_read; | |
726 | break; | |
727 | case DW_FORM_udata: | |
728 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
729 | info_ptr += bytes_read; | |
730 | break; | |
731 | case DW_FORM_ref1: | |
732 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
733 | info_ptr += 1; | |
734 | break; | |
735 | case DW_FORM_ref2: | |
736 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
737 | info_ptr += 2; | |
738 | break; | |
739 | case DW_FORM_ref4: | |
740 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
741 | info_ptr += 4; | |
742 | break; | |
81edd86d MM |
743 | case DW_FORM_ref8: |
744 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
745 | info_ptr += 8; | |
746 | break; | |
252b5132 RH |
747 | case DW_FORM_ref_udata: |
748 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
749 | info_ptr += bytes_read; | |
750 | break; | |
252b5132 | 751 | case DW_FORM_indirect: |
cf716c56 RH |
752 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
753 | info_ptr += bytes_read; | |
754 | info_ptr = read_attribute_value (attr, form, unit, info_ptr); | |
755 | break; | |
252b5132 | 756 | default: |
f46c2da6 | 757 | (*_bfd_error_handler) (_("Dwarf Error: Invalid or unhandled FORM value: %u."), |
cf716c56 | 758 | form); |
252b5132 RH |
759 | bfd_set_error (bfd_error_bad_value); |
760 | } | |
761 | return info_ptr; | |
762 | } | |
763 | ||
cf716c56 RH |
764 | /* Read an attribute described by an abbreviated attribute. */ |
765 | ||
766 | static char * | |
767 | read_attribute (attr, abbrev, unit, info_ptr) | |
768 | struct attribute *attr; | |
769 | struct attr_abbrev *abbrev; | |
770 | struct comp_unit *unit; | |
771 | char *info_ptr; | |
772 | { | |
773 | attr->name = abbrev->name; | |
774 | info_ptr = read_attribute_value (attr, abbrev->form, unit, info_ptr); | |
775 | return info_ptr; | |
776 | } | |
777 | ||
a092b084 | 778 | /* Source line information table routines. */ |
252b5132 RH |
779 | |
780 | #define FILE_ALLOC_CHUNK 5 | |
781 | #define DIR_ALLOC_CHUNK 5 | |
782 | ||
a092b084 NC |
783 | struct line_info |
784 | { | |
252b5132 | 785 | struct line_info* prev_line; |
252b5132 RH |
786 | bfd_vma address; |
787 | char* filename; | |
788 | unsigned int line; | |
789 | unsigned int column; | |
a092b084 | 790 | int end_sequence; /* End of (sequential) code sequence. */ |
252b5132 RH |
791 | }; |
792 | ||
a092b084 NC |
793 | struct fileinfo |
794 | { | |
252b5132 RH |
795 | char *name; |
796 | unsigned int dir; | |
797 | unsigned int time; | |
798 | unsigned int size; | |
799 | }; | |
800 | ||
a092b084 NC |
801 | struct line_info_table |
802 | { | |
252b5132 | 803 | bfd* abfd; |
252b5132 RH |
804 | unsigned int num_files; |
805 | unsigned int num_dirs; | |
252b5132 RH |
806 | char* comp_dir; |
807 | char** dirs; | |
808 | struct fileinfo* files; | |
809 | struct line_info* last_line; | |
810 | }; | |
811 | ||
1ee24f27 DJ |
812 | struct funcinfo |
813 | { | |
814 | struct funcinfo *prev_func; | |
815 | char* name; | |
816 | bfd_vma low; | |
817 | bfd_vma high; | |
818 | }; | |
819 | ||
98591c73 | 820 | static void |
159002ff | 821 | add_line_info (table, address, filename, line, column, end_sequence) |
252b5132 RH |
822 | struct line_info_table* table; |
823 | bfd_vma address; | |
824 | char* filename; | |
825 | unsigned int line; | |
826 | unsigned int column; | |
159002ff | 827 | int end_sequence; |
252b5132 | 828 | { |
dc810e39 AM |
829 | bfd_size_type amt = sizeof (struct line_info); |
830 | struct line_info* info = (struct line_info*) bfd_alloc (table->abfd, amt); | |
252b5132 RH |
831 | |
832 | info->prev_line = table->last_line; | |
833 | table->last_line = info; | |
834 | ||
835 | info->address = address; | |
836 | info->filename = filename; | |
837 | info->line = line; | |
838 | info->column = column; | |
159002ff | 839 | info->end_sequence = end_sequence; |
252b5132 RH |
840 | } |
841 | ||
a092b084 | 842 | static char * |
252b5132 RH |
843 | concat_filename (table, file) |
844 | struct line_info_table* table; | |
845 | unsigned int file; | |
846 | { | |
159002ff RH |
847 | char* filename; |
848 | ||
849 | if (file - 1 >= table->num_files) | |
850 | { | |
dcdea4f4 AM |
851 | (*_bfd_error_handler) |
852 | (_("Dwarf Error: mangled line number section (bad file number).")); | |
159002ff RH |
853 | return "<unknown>"; |
854 | } | |
855 | ||
856 | filename = table->files[file - 1].name; | |
51db3708 | 857 | if (IS_ABSOLUTE_PATH(filename)) |
252b5132 | 858 | return filename; |
252b5132 RH |
859 | else |
860 | { | |
861 | char* dirname = (table->files[file - 1].dir | |
862 | ? table->dirs[table->files[file - 1].dir - 1] | |
863 | : table->comp_dir); | |
0dafd5f6 RE |
864 | |
865 | /* Not all tools set DW_AT_comp_dir, so dirname may be unknown. The | |
866 | best we can do is return the filename part. */ | |
867 | if (dirname == NULL) | |
868 | return filename; | |
869 | else | |
870 | return (char*) concat (dirname, "/", filename, NULL); | |
252b5132 RH |
871 | } |
872 | } | |
873 | ||
f623be2b RH |
874 | static void |
875 | arange_add (unit, low_pc, high_pc) | |
876 | struct comp_unit *unit; | |
877 | bfd_vma low_pc; | |
878 | bfd_vma high_pc; | |
879 | { | |
880 | struct arange *arange; | |
881 | ||
a092b084 | 882 | /* First see if we can cheaply extend an existing range. */ |
f623be2b | 883 | arange = &unit->arange; |
98591c73 | 884 | |
f623be2b RH |
885 | do |
886 | { | |
887 | if (low_pc == arange->high) | |
888 | { | |
889 | arange->high = high_pc; | |
890 | return; | |
891 | } | |
892 | if (high_pc == arange->low) | |
893 | { | |
894 | arange->low = low_pc; | |
895 | return; | |
896 | } | |
897 | arange = arange->next; | |
898 | } | |
899 | while (arange); | |
900 | ||
901 | if (unit->arange.high == 0) | |
902 | { | |
a092b084 | 903 | /* This is the first address range: store it in unit->arange. */ |
f623be2b RH |
904 | unit->arange.next = 0; |
905 | unit->arange.low = low_pc; | |
906 | unit->arange.high = high_pc; | |
907 | return; | |
908 | } | |
909 | ||
a092b084 | 910 | /* Need to allocate a new arange and insert it into the arange list. */ |
dc810e39 | 911 | arange = bfd_zalloc (unit->abfd, (bfd_size_type) sizeof (*arange)); |
f623be2b RH |
912 | arange->low = low_pc; |
913 | arange->high = high_pc; | |
914 | ||
915 | arange->next = unit->arange.next; | |
916 | unit->arange.next = arange; | |
917 | } | |
918 | ||
a092b084 | 919 | /* Decode the line number information for UNIT. */ |
252b5132 RH |
920 | |
921 | static struct line_info_table* | |
51db3708 | 922 | decode_line_info (unit, stash) |
252b5132 | 923 | struct comp_unit *unit; |
51db3708 | 924 | struct dwarf2_debug *stash; |
252b5132 RH |
925 | { |
926 | bfd *abfd = unit->abfd; | |
252b5132 | 927 | struct line_info_table* table; |
252b5132 RH |
928 | char *line_ptr; |
929 | char *line_end; | |
930 | struct line_head lh; | |
d03ba2a1 | 931 | unsigned int i, bytes_read, offset_size; |
252b5132 RH |
932 | char *cur_file, *cur_dir; |
933 | unsigned char op_code, extended_op, adj_opcode; | |
dc810e39 | 934 | bfd_size_type amt; |
252b5132 | 935 | |
69dd2e2d | 936 | if (! stash->dwarf_line_buffer) |
252b5132 RH |
937 | { |
938 | asection *msec; | |
252b5132 RH |
939 | |
940 | msec = bfd_get_section_by_name (abfd, ".debug_line"); | |
941 | if (! msec) | |
942 | { | |
943 | (*_bfd_error_handler) (_("Dwarf Error: Can't find .debug_line section.")); | |
944 | bfd_set_error (bfd_error_bad_value); | |
945 | return 0; | |
946 | } | |
98591c73 | 947 | |
ccdb16fc | 948 | stash->dwarf_line_size = msec->_raw_size; |
dc810e39 | 949 | stash->dwarf_line_buffer = (char *) bfd_alloc (abfd, msec->_raw_size); |
f623be2b | 950 | if (! stash->dwarf_line_buffer) |
252b5132 RH |
951 | return 0; |
952 | ||
dc810e39 AM |
953 | if (! bfd_get_section_contents (abfd, msec, stash->dwarf_line_buffer, |
954 | (bfd_vma) 0, msec->_raw_size)) | |
252b5132 RH |
955 | return 0; |
956 | ||
957 | /* FIXME: We ought to apply the relocs against this section before | |
a092b084 | 958 | we process it... */ |
252b5132 RH |
959 | } |
960 | ||
ccdb16fc JW |
961 | /* Since we are using un-relocated data, it is possible to get a bad value |
962 | for the line_offset. Validate it here so that we won't get a segfault | |
963 | below. */ | |
964 | if (unit->line_offset >= stash->dwarf_line_size) | |
965 | { | |
f46c2da6 | 966 | (*_bfd_error_handler) (_("Dwarf Error: Line offset (%lu) greater than or equal to .debug_line size (%lu)."), |
ccdb16fc JW |
967 | unit->line_offset, stash->dwarf_line_size); |
968 | bfd_set_error (bfd_error_bad_value); | |
969 | return 0; | |
970 | } | |
971 | ||
dc810e39 AM |
972 | amt = sizeof (struct line_info_table); |
973 | table = (struct line_info_table*) bfd_alloc (abfd, amt); | |
252b5132 RH |
974 | table->abfd = abfd; |
975 | table->comp_dir = unit->comp_dir; | |
976 | ||
977 | table->num_files = 0; | |
978 | table->files = NULL; | |
979 | ||
980 | table->num_dirs = 0; | |
981 | table->dirs = NULL; | |
982 | ||
159002ff RH |
983 | table->files = NULL; |
984 | table->last_line = NULL; | |
985 | ||
69dd2e2d | 986 | line_ptr = stash->dwarf_line_buffer + unit->line_offset; |
252b5132 | 987 | |
a092b084 | 988 | /* Read in the prologue. */ |
91a4d569 AM |
989 | lh.total_length = read_4_bytes (abfd, line_ptr); |
990 | line_ptr += 4; | |
991 | offset_size = 4; | |
992 | if (lh.total_length == 0xffffffff) | |
dae2dd0d | 993 | { |
dae2dd0d NC |
994 | lh.total_length = read_8_bytes (abfd, line_ptr); |
995 | line_ptr += 8; | |
996 | offset_size = 8; | |
997 | } | |
91a4d569 | 998 | else if (lh.total_length == 0 && unit->addr_size == 8) |
d03ba2a1 | 999 | { |
91a4d569 AM |
1000 | /* Handle (non-standard) 64-bit DWARF2 formats. */ |
1001 | lh.total_length = read_4_bytes (abfd, line_ptr); | |
1002 | line_ptr += 4; | |
d03ba2a1 JJ |
1003 | offset_size = 8; |
1004 | } | |
252b5132 RH |
1005 | line_end = line_ptr + lh.total_length; |
1006 | lh.version = read_2_bytes (abfd, line_ptr); | |
1007 | line_ptr += 2; | |
d03ba2a1 JJ |
1008 | if (offset_size == 4) |
1009 | lh.prologue_length = read_4_bytes (abfd, line_ptr); | |
1010 | else | |
1011 | lh.prologue_length = read_8_bytes (abfd, line_ptr); | |
1012 | line_ptr += offset_size; | |
252b5132 RH |
1013 | lh.minimum_instruction_length = read_1_byte (abfd, line_ptr); |
1014 | line_ptr += 1; | |
1015 | lh.default_is_stmt = read_1_byte (abfd, line_ptr); | |
1016 | line_ptr += 1; | |
1017 | lh.line_base = read_1_signed_byte (abfd, line_ptr); | |
1018 | line_ptr += 1; | |
1019 | lh.line_range = read_1_byte (abfd, line_ptr); | |
1020 | line_ptr += 1; | |
1021 | lh.opcode_base = read_1_byte (abfd, line_ptr); | |
1022 | line_ptr += 1; | |
dc810e39 AM |
1023 | amt = lh.opcode_base * sizeof (unsigned char); |
1024 | lh.standard_opcode_lengths = (unsigned char *) bfd_alloc (abfd, amt); | |
252b5132 RH |
1025 | |
1026 | lh.standard_opcode_lengths[0] = 1; | |
98591c73 | 1027 | |
252b5132 RH |
1028 | for (i = 1; i < lh.opcode_base; ++i) |
1029 | { | |
1030 | lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
1031 | line_ptr += 1; | |
1032 | } | |
1033 | ||
a092b084 | 1034 | /* Read directory table. */ |
252b5132 RH |
1035 | while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
1036 | { | |
1037 | line_ptr += bytes_read; | |
98591c73 | 1038 | |
252b5132 RH |
1039 | if ((table->num_dirs % DIR_ALLOC_CHUNK) == 0) |
1040 | { | |
dc810e39 AM |
1041 | amt = table->num_dirs + DIR_ALLOC_CHUNK; |
1042 | amt *= sizeof (char *); | |
1043 | table->dirs = (char **) bfd_realloc (table->dirs, amt); | |
252b5132 RH |
1044 | if (! table->dirs) |
1045 | return 0; | |
1046 | } | |
98591c73 | 1047 | |
252b5132 RH |
1048 | table->dirs[table->num_dirs++] = cur_dir; |
1049 | } | |
98591c73 | 1050 | |
252b5132 RH |
1051 | line_ptr += bytes_read; |
1052 | ||
a092b084 | 1053 | /* Read file name table. */ |
252b5132 RH |
1054 | while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
1055 | { | |
1056 | line_ptr += bytes_read; | |
98591c73 | 1057 | |
252b5132 RH |
1058 | if ((table->num_files % FILE_ALLOC_CHUNK) == 0) |
1059 | { | |
dc810e39 AM |
1060 | amt = table->num_files + FILE_ALLOC_CHUNK; |
1061 | amt *= sizeof (struct fileinfo); | |
1062 | table->files = (struct fileinfo *) bfd_realloc (table->files, amt); | |
252b5132 RH |
1063 | if (! table->files) |
1064 | return 0; | |
1065 | } | |
98591c73 | 1066 | |
252b5132 RH |
1067 | table->files[table->num_files].name = cur_file; |
1068 | table->files[table->num_files].dir = | |
1069 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1070 | line_ptr += bytes_read; | |
1071 | table->files[table->num_files].time = | |
1072 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1073 | line_ptr += bytes_read; | |
1074 | table->files[table->num_files].size = | |
1075 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1076 | line_ptr += bytes_read; | |
1077 | table->num_files++; | |
1078 | } | |
98591c73 | 1079 | |
252b5132 RH |
1080 | line_ptr += bytes_read; |
1081 | ||
1082 | /* Read the statement sequences until there's nothing left. */ | |
1083 | while (line_ptr < line_end) | |
1084 | { | |
a092b084 | 1085 | /* State machine registers. */ |
252b5132 | 1086 | bfd_vma address = 0; |
e2f6d277 | 1087 | char * filename = concat_filename (table, 1); |
252b5132 RH |
1088 | unsigned int line = 1; |
1089 | unsigned int column = 0; | |
1090 | int is_stmt = lh.default_is_stmt; | |
1091 | int basic_block = 0; | |
e2f6d277 NC |
1092 | int end_sequence = 0; |
1093 | /* eraxxon@alumni.rice.edu: Against the DWARF2 specs, some | |
1094 | compilers generate address sequences that are wildly out of | |
1095 | order using DW_LNE_set_address (e.g. Intel C++ 6.0 compiler | |
1096 | for ia64-Linux). Thus, to determine the low and high | |
1097 | address, we must compare on every DW_LNS_copy, etc. */ | |
1098 | bfd_vma low_pc = 0; | |
1099 | bfd_vma high_pc = 0; | |
252b5132 | 1100 | |
a092b084 | 1101 | /* Decode the table. */ |
252b5132 RH |
1102 | while (! end_sequence) |
1103 | { | |
1104 | op_code = read_1_byte (abfd, line_ptr); | |
1105 | line_ptr += 1; | |
98591c73 | 1106 | |
1a509dcc | 1107 | if (op_code >= lh.opcode_base) |
e2f6d277 NC |
1108 | { |
1109 | /* Special operand. */ | |
1a509dcc GK |
1110 | adj_opcode = op_code - lh.opcode_base; |
1111 | address += (adj_opcode / lh.line_range) | |
1112 | * lh.minimum_instruction_length; | |
1113 | line += lh.line_base + (adj_opcode % lh.line_range); | |
1114 | /* Append row to matrix using current values. */ | |
1115 | add_line_info (table, address, filename, line, column, 0); | |
1116 | basic_block = 1; | |
e2f6d277 NC |
1117 | if (low_pc == 0 || address < low_pc) |
1118 | low_pc = address; | |
1119 | if (address > high_pc) | |
1120 | high_pc = address; | |
1a509dcc GK |
1121 | } |
1122 | else switch (op_code) | |
252b5132 RH |
1123 | { |
1124 | case DW_LNS_extended_op: | |
e2f6d277 NC |
1125 | /* Ignore length. */ |
1126 | line_ptr += 1; | |
252b5132 RH |
1127 | extended_op = read_1_byte (abfd, line_ptr); |
1128 | line_ptr += 1; | |
e2f6d277 | 1129 | |
252b5132 RH |
1130 | switch (extended_op) |
1131 | { | |
1132 | case DW_LNE_end_sequence: | |
1133 | end_sequence = 1; | |
f623be2b RH |
1134 | add_line_info (table, address, filename, line, column, |
1135 | end_sequence); | |
e2f6d277 NC |
1136 | if (low_pc == 0 || address < low_pc) |
1137 | low_pc = address; | |
1138 | if (address > high_pc) | |
1139 | high_pc = address; | |
a2ce5bdc | 1140 | arange_add (unit, low_pc, high_pc); |
252b5132 RH |
1141 | break; |
1142 | case DW_LNE_set_address: | |
1143 | address = read_address (unit, line_ptr); | |
1144 | line_ptr += unit->addr_size; | |
1145 | break; | |
1146 | case DW_LNE_define_file: | |
1147 | cur_file = read_string (abfd, line_ptr, &bytes_read); | |
1148 | line_ptr += bytes_read; | |
1149 | if ((table->num_files % FILE_ALLOC_CHUNK) == 0) | |
1150 | { | |
dc810e39 AM |
1151 | amt = table->num_files + FILE_ALLOC_CHUNK; |
1152 | amt *= sizeof (struct fileinfo); | |
1153 | table->files = | |
1154 | (struct fileinfo *) bfd_realloc (table->files, amt); | |
252b5132 RH |
1155 | if (! table->files) |
1156 | return 0; | |
1157 | } | |
1158 | table->files[table->num_files].name = cur_file; | |
1159 | table->files[table->num_files].dir = | |
1160 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1161 | line_ptr += bytes_read; | |
1162 | table->files[table->num_files].time = | |
1163 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1164 | line_ptr += bytes_read; | |
1165 | table->files[table->num_files].size = | |
1166 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1167 | line_ptr += bytes_read; | |
1168 | table->num_files++; | |
1169 | break; | |
1170 | default: | |
1171 | (*_bfd_error_handler) (_("Dwarf Error: mangled line number section.")); | |
1172 | bfd_set_error (bfd_error_bad_value); | |
1173 | return 0; | |
1174 | } | |
1175 | break; | |
1176 | case DW_LNS_copy: | |
159002ff | 1177 | add_line_info (table, address, filename, line, column, 0); |
252b5132 | 1178 | basic_block = 0; |
e2f6d277 NC |
1179 | if (low_pc == 0 || address < low_pc) |
1180 | low_pc = address; | |
1181 | if (address > high_pc) | |
1182 | high_pc = address; | |
252b5132 RH |
1183 | break; |
1184 | case DW_LNS_advance_pc: | |
1185 | address += lh.minimum_instruction_length | |
1186 | * read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1187 | line_ptr += bytes_read; | |
1188 | break; | |
1189 | case DW_LNS_advance_line: | |
1190 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
1191 | line_ptr += bytes_read; | |
1192 | break; | |
1193 | case DW_LNS_set_file: | |
1194 | { | |
1195 | unsigned int file; | |
1196 | ||
e2f6d277 NC |
1197 | /* The file and directory tables are 0 |
1198 | based, the references are 1 based. */ | |
252b5132 RH |
1199 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
1200 | line_ptr += bytes_read; | |
1201 | filename = concat_filename (table, file); | |
1202 | break; | |
1203 | } | |
1204 | case DW_LNS_set_column: | |
1205 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1206 | line_ptr += bytes_read; | |
1207 | break; | |
1208 | case DW_LNS_negate_stmt: | |
1209 | is_stmt = (!is_stmt); | |
1210 | break; | |
1211 | case DW_LNS_set_basic_block: | |
1212 | basic_block = 1; | |
1213 | break; | |
1214 | case DW_LNS_const_add_pc: | |
159002ff RH |
1215 | address += lh.minimum_instruction_length |
1216 | * ((255 - lh.opcode_base) / lh.line_range); | |
252b5132 RH |
1217 | break; |
1218 | case DW_LNS_fixed_advance_pc: | |
1219 | address += read_2_bytes (abfd, line_ptr); | |
1220 | line_ptr += 2; | |
1221 | break; | |
1a509dcc | 1222 | default: |
e2f6d277 | 1223 | { |
1a509dcc | 1224 | int i; |
e2f6d277 | 1225 | /* Unknown standard opcode, ignore it. */ |
1a509dcc GK |
1226 | for (i = 0; i < lh.standard_opcode_lengths[op_code]; i++) |
1227 | { | |
1228 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1229 | line_ptr += bytes_read; | |
1230 | } | |
1231 | } | |
252b5132 RH |
1232 | } |
1233 | } | |
1234 | } | |
1235 | ||
1236 | return table; | |
1237 | } | |
1238 | ||
252b5132 RH |
1239 | /* If ADDR is within TABLE set the output parameters and return true, |
1240 | otherwise return false. The output parameters, FILENAME_PTR and | |
a092b084 | 1241 | LINENUMBER_PTR, are pointers to the objects to be filled in. */ |
252b5132 RH |
1242 | |
1243 | static boolean | |
e2f6d277 | 1244 | lookup_address_in_line_info_table (table, addr, function, filename_ptr, |
252b5132 RH |
1245 | linenumber_ptr) |
1246 | struct line_info_table* table; | |
1247 | bfd_vma addr; | |
1ee24f27 | 1248 | struct funcinfo *function; |
252b5132 RH |
1249 | const char **filename_ptr; |
1250 | unsigned int *linenumber_ptr; | |
1251 | { | |
159002ff | 1252 | struct line_info* next_line = table->last_line; |
252b5132 | 1253 | struct line_info* each_line; |
98591c73 | 1254 | |
159002ff RH |
1255 | if (!next_line) |
1256 | return false; | |
1257 | ||
1258 | each_line = next_line->prev_line; | |
1259 | ||
1260 | while (each_line && next_line) | |
252b5132 | 1261 | { |
159002ff RH |
1262 | if (!each_line->end_sequence |
1263 | && addr >= each_line->address && addr < next_line->address) | |
252b5132 | 1264 | { |
1ee24f27 DJ |
1265 | /* If this line appears to span functions, and addr is in the |
1266 | later function, return the first line of that function instead | |
1267 | of the last line of the earlier one. This check is for GCC | |
1268 | 2.95, which emits the first line number for a function late. */ | |
1269 | if (function != NULL | |
1270 | && each_line->address < function->low | |
1271 | && next_line->address > function->low) | |
1272 | { | |
1273 | *filename_ptr = next_line->filename; | |
1274 | *linenumber_ptr = next_line->line; | |
1275 | } | |
1276 | else | |
1277 | { | |
1278 | *filename_ptr = each_line->filename; | |
1279 | *linenumber_ptr = each_line->line; | |
1280 | } | |
252b5132 RH |
1281 | return true; |
1282 | } | |
159002ff RH |
1283 | next_line = each_line; |
1284 | each_line = each_line->prev_line; | |
252b5132 | 1285 | } |
98591c73 | 1286 | |
1ee24f27 DJ |
1287 | /* At this point each_line is NULL but next_line is not. If we found the |
1288 | containing function in this compilation unit, return the first line we | |
1289 | have a number for. This is also for compatibility with GCC 2.95. */ | |
1290 | if (function != NULL) | |
1291 | { | |
1292 | *filename_ptr = next_line->filename; | |
1293 | *linenumber_ptr = next_line->line; | |
1294 | return true; | |
1295 | } | |
1296 | ||
252b5132 RH |
1297 | return false; |
1298 | } | |
98591c73 | 1299 | |
a092b084 | 1300 | /* Function table functions. */ |
252b5132 | 1301 | |
98591c73 | 1302 | /* If ADDR is within TABLE, set FUNCTIONNAME_PTR, and return true. */ |
252b5132 RH |
1303 | |
1304 | static boolean | |
e2f6d277 | 1305 | lookup_address_in_function_table (table, addr, function_ptr, |
252b5132 RH |
1306 | functionname_ptr) |
1307 | struct funcinfo* table; | |
1308 | bfd_vma addr; | |
1ee24f27 | 1309 | struct funcinfo** function_ptr; |
252b5132 RH |
1310 | const char **functionname_ptr; |
1311 | { | |
1312 | struct funcinfo* each_func; | |
1313 | ||
1314 | for (each_func = table; | |
1315 | each_func; | |
1316 | each_func = each_func->prev_func) | |
1317 | { | |
1318 | if (addr >= each_func->low && addr < each_func->high) | |
1319 | { | |
1320 | *functionname_ptr = each_func->name; | |
1ee24f27 | 1321 | *function_ptr = each_func; |
252b5132 RH |
1322 | return true; |
1323 | } | |
1324 | } | |
98591c73 | 1325 | |
252b5132 RH |
1326 | return false; |
1327 | } | |
1328 | ||
a092b084 | 1329 | /* DWARF2 Compilation unit functions. */ |
252b5132 RH |
1330 | |
1331 | /* Scan over each die in a comp. unit looking for functions to add | |
a092b084 | 1332 | to the function table. */ |
252b5132 RH |
1333 | |
1334 | static boolean | |
1335 | scan_unit_for_functions (unit) | |
1336 | struct comp_unit *unit; | |
1337 | { | |
1338 | bfd *abfd = unit->abfd; | |
1339 | char *info_ptr = unit->first_child_die_ptr; | |
1340 | int nesting_level = 1; | |
1341 | ||
1342 | while (nesting_level) | |
1343 | { | |
1344 | unsigned int abbrev_number, bytes_read, i; | |
1345 | struct abbrev_info *abbrev; | |
1346 | struct attribute attr; | |
1347 | struct funcinfo *func; | |
1348 | char* name = 0; | |
1349 | ||
1350 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
1351 | info_ptr += bytes_read; | |
1352 | ||
1353 | if (! abbrev_number) | |
1354 | { | |
1355 | nesting_level--; | |
1356 | continue; | |
1357 | } | |
98591c73 | 1358 | |
252b5132 RH |
1359 | abbrev = lookup_abbrev (abbrev_number,unit->abbrevs); |
1360 | if (! abbrev) | |
1361 | { | |
f46c2da6 | 1362 | (*_bfd_error_handler) (_("Dwarf Error: Could not find abbrev number %u."), |
252b5132 RH |
1363 | abbrev_number); |
1364 | bfd_set_error (bfd_error_bad_value); | |
1365 | return false; | |
1366 | } | |
98591c73 | 1367 | |
252b5132 RH |
1368 | if (abbrev->tag == DW_TAG_subprogram) |
1369 | { | |
dc810e39 AM |
1370 | bfd_size_type amt = sizeof (struct funcinfo); |
1371 | func = (struct funcinfo *) bfd_zalloc (abfd, amt); | |
252b5132 RH |
1372 | func->prev_func = unit->function_table; |
1373 | unit->function_table = func; | |
1374 | } | |
1375 | else | |
1376 | func = NULL; | |
98591c73 | 1377 | |
252b5132 RH |
1378 | for (i = 0; i < abbrev->num_attrs; ++i) |
1379 | { | |
1380 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr); | |
98591c73 | 1381 | |
252b5132 RH |
1382 | if (func) |
1383 | { | |
1384 | switch (attr.name) | |
1385 | { | |
1386 | case DW_AT_name: | |
98591c73 | 1387 | |
252b5132 RH |
1388 | name = DW_STRING (&attr); |
1389 | ||
1390 | /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */ | |
1391 | if (func->name == NULL) | |
1392 | func->name = DW_STRING (&attr); | |
1393 | break; | |
98591c73 | 1394 | |
252b5132 RH |
1395 | case DW_AT_MIPS_linkage_name: |
1396 | func->name = DW_STRING (&attr); | |
1397 | break; | |
1398 | ||
1399 | case DW_AT_low_pc: | |
1400 | func->low = DW_ADDR (&attr); | |
1401 | break; | |
1402 | ||
1403 | case DW_AT_high_pc: | |
1404 | func->high = DW_ADDR (&attr); | |
1405 | break; | |
1406 | ||
1407 | default: | |
1408 | break; | |
1409 | } | |
1410 | } | |
1411 | else | |
1412 | { | |
1413 | switch (attr.name) | |
1414 | { | |
1415 | case DW_AT_name: | |
1416 | name = DW_STRING (&attr); | |
1417 | break; | |
98591c73 | 1418 | |
252b5132 RH |
1419 | default: |
1420 | break; | |
1421 | } | |
1422 | } | |
1423 | } | |
1424 | ||
1425 | if (abbrev->has_children) | |
1426 | nesting_level++; | |
1427 | } | |
1428 | ||
1429 | return true; | |
1430 | } | |
1431 | ||
f2363ce5 AO |
1432 | /* Look for a RELA relocation to be applied on OFFSET of section SEC, |
1433 | and return the addend if such a relocation is found. Since this is | |
1434 | only used to find relocations referring to the .debug_abbrev | |
1435 | section, we make sure the relocation refers to this section, but | |
1436 | this is not strictly necessary, and it can probably be safely | |
1437 | removed if needed. However, it is important to note that this | |
1438 | function only returns the addend, it doesn't serve the purpose of | |
1439 | applying a generic relocation. | |
1440 | ||
1441 | If no suitable relocation is found, or if it is not a real RELA | |
1442 | relocation, this function returns 0. */ | |
1443 | ||
1444 | static bfd_vma | |
1445 | find_rela_addend (abfd, sec, offset, syms) | |
1446 | bfd* abfd; | |
1447 | asection* sec; | |
1448 | bfd_size_type offset; | |
1449 | asymbol** syms; | |
1450 | { | |
1451 | long reloc_size = bfd_get_reloc_upper_bound (abfd, sec); | |
1452 | arelent **relocs = NULL; | |
1453 | long reloc_count, relc; | |
1454 | ||
1455 | if (reloc_size <= 0) | |
1456 | return 0; | |
1457 | ||
dc810e39 | 1458 | relocs = (arelent **) bfd_malloc ((bfd_size_type) reloc_size); |
f2363ce5 AO |
1459 | if (relocs == NULL) |
1460 | return 0; | |
1461 | ||
1462 | reloc_count = bfd_canonicalize_reloc (abfd, sec, relocs, syms); | |
1463 | ||
1464 | if (reloc_count <= 0) | |
1465 | { | |
1466 | free (relocs); | |
1467 | return 0; | |
1468 | } | |
1469 | ||
1470 | for (relc = 0; relc < reloc_count; relc++) | |
1471 | if (relocs[relc]->address == offset | |
1472 | && (*relocs[relc]->sym_ptr_ptr)->flags & BSF_SECTION_SYM | |
1473 | && strcmp ((*relocs[relc]->sym_ptr_ptr)->name, | |
1474 | ".debug_abbrev") == 0) | |
1475 | { | |
1476 | bfd_vma addend = (relocs[relc]->howto->partial_inplace | |
1477 | ? 0 : relocs[relc]->addend); | |
1478 | free (relocs); | |
1479 | return addend; | |
1480 | } | |
dc810e39 | 1481 | |
f2363ce5 AO |
1482 | free (relocs); |
1483 | return 0; | |
1484 | } | |
1485 | ||
5e38c3b8 MM |
1486 | /* Parse a DWARF2 compilation unit starting at INFO_PTR. This |
1487 | includes the compilation unit header that proceeds the DIE's, but | |
1488 | does not include the length field that preceeds each compilation | |
1489 | unit header. END_PTR points one past the end of this comp unit. | |
d03ba2a1 | 1490 | OFFSET_SIZE is the size of DWARF2 offsets (either 4 or 8 bytes). |
252b5132 RH |
1491 | |
1492 | This routine does not read the whole compilation unit; only enough | |
1493 | to get to the line number information for the compilation unit. */ | |
1494 | ||
1495 | static struct comp_unit * | |
d03ba2a1 | 1496 | parse_comp_unit (abfd, stash, unit_length, offset_size) |
252b5132 | 1497 | bfd* abfd; |
51db3708 NC |
1498 | struct dwarf2_debug *stash; |
1499 | bfd_vma unit_length; | |
d03ba2a1 | 1500 | unsigned int offset_size; |
252b5132 RH |
1501 | { |
1502 | struct comp_unit* unit; | |
f46c2da6 AM |
1503 | unsigned int version; |
1504 | bfd_vma abbrev_offset = 0; | |
1505 | unsigned int addr_size; | |
252b5132 | 1506 | struct abbrev_info** abbrevs; |
252b5132 RH |
1507 | unsigned int abbrev_number, bytes_read, i; |
1508 | struct abbrev_info *abbrev; | |
1509 | struct attribute attr; | |
51db3708 NC |
1510 | char *info_ptr = stash->info_ptr; |
1511 | char *end_ptr = info_ptr + unit_length; | |
dc810e39 AM |
1512 | bfd_size_type amt; |
1513 | bfd_size_type off; | |
3fde5a36 | 1514 | |
252b5132 RH |
1515 | version = read_2_bytes (abfd, info_ptr); |
1516 | info_ptr += 2; | |
d03ba2a1 JJ |
1517 | BFD_ASSERT (offset_size == 4 || offset_size == 8); |
1518 | if (offset_size == 4) | |
5e38c3b8 | 1519 | abbrev_offset = read_4_bytes (abfd, info_ptr); |
d03ba2a1 | 1520 | else |
5e38c3b8 | 1521 | abbrev_offset = read_8_bytes (abfd, info_ptr); |
f2363ce5 AO |
1522 | /* The abbrev offset is generally a relocation pointing to |
1523 | .debug_abbrev+offset. On RELA targets, we have to find the | |
1524 | relocation and extract the addend to obtain the actual | |
1525 | abbrev_offset, so do it here. */ | |
dc810e39 AM |
1526 | off = info_ptr - stash->sec_info_ptr; |
1527 | abbrev_offset += find_rela_addend (abfd, stash->sec, off, stash->syms); | |
d03ba2a1 | 1528 | info_ptr += offset_size; |
252b5132 RH |
1529 | addr_size = read_1_byte (abfd, info_ptr); |
1530 | info_ptr += 1; | |
1531 | ||
1532 | if (version != 2) | |
1533 | { | |
f46c2da6 | 1534 | (*_bfd_error_handler) (_("Dwarf Error: found dwarf version '%u', this reader only handles version 2 information."), version); |
252b5132 RH |
1535 | bfd_set_error (bfd_error_bad_value); |
1536 | return 0; | |
1537 | } | |
1538 | ||
1539 | if (addr_size > sizeof (bfd_vma)) | |
1540 | { | |
1541 | (*_bfd_error_handler) (_("Dwarf Error: found address size '%u', this reader can not handle sizes greater than '%u'."), | |
1542 | addr_size, | |
f46c2da6 | 1543 | (unsigned int) sizeof (bfd_vma)); |
252b5132 RH |
1544 | bfd_set_error (bfd_error_bad_value); |
1545 | return 0; | |
1546 | } | |
1547 | ||
ecb651f0 | 1548 | if (addr_size != 2 && addr_size != 4 && addr_size != 8) |
252b5132 | 1549 | { |
f5a3e38a | 1550 | (*_bfd_error_handler) ("Dwarf Error: found address size '%u', this reader can only handle address sizes '2', '4' and '8'.", addr_size); |
252b5132 RH |
1551 | bfd_set_error (bfd_error_bad_value); |
1552 | return 0; | |
1553 | } | |
1554 | ||
a092b084 | 1555 | /* Read the abbrevs for this compilation unit into a table. */ |
51db3708 | 1556 | abbrevs = read_abbrevs (abfd, abbrev_offset, stash); |
252b5132 RH |
1557 | if (! abbrevs) |
1558 | return 0; | |
1559 | ||
1560 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
1561 | info_ptr += bytes_read; | |
1562 | if (! abbrev_number) | |
1563 | { | |
f46c2da6 | 1564 | (*_bfd_error_handler) (_("Dwarf Error: Bad abbrev number: %u."), |
252b5132 RH |
1565 | abbrev_number); |
1566 | bfd_set_error (bfd_error_bad_value); | |
1567 | return 0; | |
1568 | } | |
1569 | ||
1570 | abbrev = lookup_abbrev (abbrev_number, abbrevs); | |
1571 | if (! abbrev) | |
1572 | { | |
f46c2da6 | 1573 | (*_bfd_error_handler) (_("Dwarf Error: Could not find abbrev number %u."), |
252b5132 RH |
1574 | abbrev_number); |
1575 | bfd_set_error (bfd_error_bad_value); | |
1576 | return 0; | |
1577 | } | |
98591c73 | 1578 | |
dc810e39 AM |
1579 | amt = sizeof (struct comp_unit); |
1580 | unit = (struct comp_unit*) bfd_zalloc (abfd, amt); | |
252b5132 | 1581 | unit->abfd = abfd; |
98591c73 | 1582 | unit->addr_size = addr_size; |
d03ba2a1 | 1583 | unit->offset_size = offset_size; |
252b5132 RH |
1584 | unit->abbrevs = abbrevs; |
1585 | unit->end_ptr = end_ptr; | |
d03ba2a1 | 1586 | unit->stash = stash; |
252b5132 RH |
1587 | |
1588 | for (i = 0; i < abbrev->num_attrs; ++i) | |
1589 | { | |
1590 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr); | |
1591 | ||
1592 | /* Store the data if it is of an attribute we want to keep in a | |
1593 | partial symbol table. */ | |
1594 | switch (attr.name) | |
1595 | { | |
1596 | case DW_AT_stmt_list: | |
1597 | unit->stmtlist = 1; | |
1598 | unit->line_offset = DW_UNSND (&attr); | |
1599 | break; | |
1600 | ||
1601 | case DW_AT_name: | |
1602 | unit->name = DW_STRING (&attr); | |
1603 | break; | |
1604 | ||
1605 | case DW_AT_low_pc: | |
f623be2b | 1606 | unit->arange.low = DW_ADDR (&attr); |
252b5132 RH |
1607 | break; |
1608 | ||
1609 | case DW_AT_high_pc: | |
f623be2b | 1610 | unit->arange.high = DW_ADDR (&attr); |
252b5132 RH |
1611 | break; |
1612 | ||
1613 | case DW_AT_comp_dir: | |
1614 | { | |
1615 | char* comp_dir = DW_STRING (&attr); | |
1616 | if (comp_dir) | |
1617 | { | |
1618 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
1619 | directory, get rid of it. */ | |
1620 | char *cp = (char*) strchr (comp_dir, ':'); | |
1621 | ||
1622 | if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/') | |
1623 | comp_dir = cp + 1; | |
1624 | } | |
1625 | unit->comp_dir = comp_dir; | |
1626 | break; | |
1627 | } | |
1628 | ||
1629 | default: | |
1630 | break; | |
1631 | } | |
1632 | } | |
1633 | ||
1634 | unit->first_child_die_ptr = info_ptr; | |
1635 | return unit; | |
1636 | } | |
1637 | ||
a092b084 | 1638 | /* Return true if UNIT contains the address given by ADDR. */ |
252b5132 RH |
1639 | |
1640 | static boolean | |
1641 | comp_unit_contains_address (unit, addr) | |
1642 | struct comp_unit* unit; | |
1643 | bfd_vma addr; | |
1644 | { | |
f623be2b RH |
1645 | struct arange *arange; |
1646 | ||
1647 | if (unit->error) | |
1648 | return 0; | |
1649 | ||
1650 | arange = &unit->arange; | |
1651 | do | |
1652 | { | |
1653 | if (addr >= arange->low && addr < arange->high) | |
1654 | return 1; | |
1655 | arange = arange->next; | |
1656 | } | |
1657 | while (arange); | |
98591c73 | 1658 | |
f623be2b | 1659 | return 0; |
252b5132 RH |
1660 | } |
1661 | ||
252b5132 RH |
1662 | /* If UNIT contains ADDR, set the output parameters to the values for |
1663 | the line containing ADDR. The output parameters, FILENAME_PTR, | |
1664 | FUNCTIONNAME_PTR, and LINENUMBER_PTR, are pointers to the objects | |
98591c73 | 1665 | to be filled in. |
252b5132 RH |
1666 | |
1667 | Return true of UNIT contains ADDR, and no errors were encountered; | |
1668 | false otherwise. */ | |
1669 | ||
1670 | static boolean | |
e2f6d277 NC |
1671 | comp_unit_find_nearest_line (unit, addr, filename_ptr, functionname_ptr, |
1672 | linenumber_ptr, stash) | |
252b5132 RH |
1673 | struct comp_unit* unit; |
1674 | bfd_vma addr; | |
1675 | const char **filename_ptr; | |
1676 | const char **functionname_ptr; | |
1677 | unsigned int *linenumber_ptr; | |
51db3708 | 1678 | struct dwarf2_debug *stash; |
252b5132 RH |
1679 | { |
1680 | boolean line_p; | |
1681 | boolean func_p; | |
1ee24f27 | 1682 | struct funcinfo *function; |
98591c73 | 1683 | |
252b5132 RH |
1684 | if (unit->error) |
1685 | return false; | |
1686 | ||
1687 | if (! unit->line_table) | |
1688 | { | |
1689 | if (! unit->stmtlist) | |
1690 | { | |
1691 | unit->error = 1; | |
1692 | return false; | |
1693 | } | |
98591c73 | 1694 | |
51db3708 | 1695 | unit->line_table = decode_line_info (unit, stash); |
252b5132 RH |
1696 | |
1697 | if (! unit->line_table) | |
1698 | { | |
1699 | unit->error = 1; | |
1700 | return false; | |
1701 | } | |
98591c73 | 1702 | |
3f5864e1 SC |
1703 | if (unit->first_child_die_ptr < unit->end_ptr |
1704 | && ! scan_unit_for_functions (unit)) | |
252b5132 RH |
1705 | { |
1706 | unit->error = 1; | |
1707 | return false; | |
1708 | } | |
1709 | } | |
1710 | ||
1ee24f27 | 1711 | function = NULL; |
e2f6d277 NC |
1712 | func_p = lookup_address_in_function_table (unit->function_table, addr, |
1713 | &function, functionname_ptr); | |
1714 | line_p = lookup_address_in_line_info_table (unit->line_table, addr, | |
1715 | function, filename_ptr, | |
252b5132 | 1716 | linenumber_ptr); |
252b5132 RH |
1717 | return line_p || func_p; |
1718 | } | |
1719 | ||
e2f6d277 NC |
1720 | /* Locate a section in a BFD containing debugging info. The search starts |
1721 | from the section after AFTER_SEC, or from the first section in the BFD if | |
1722 | AFTER_SEC is NULL. The search works by examining the names of the | |
1723 | sections. There are two permissiable names. The first is .debug_info. | |
1724 | This is the standard DWARF2 name. The second is a prefix .gnu.linkonce.wi. | |
1725 | This is a variation on the .debug_info section which has a checksum | |
1726 | describing the contents appended onto the name. This allows the linker to | |
1727 | identify and discard duplicate debugging sections for different | |
1728 | compilation units. */ | |
a092b084 NC |
1729 | #define DWARF2_DEBUG_INFO ".debug_info" |
1730 | #define GNU_LINKONCE_INFO ".gnu.linkonce.wi." | |
1731 | ||
1732 | static asection * | |
1733 | find_debug_info (abfd, after_sec) | |
1734 | bfd * abfd; | |
1735 | asection * after_sec; | |
1736 | { | |
1737 | asection * msec; | |
1738 | ||
1739 | if (after_sec) | |
1740 | msec = after_sec->next; | |
1741 | else | |
1742 | msec = abfd->sections; | |
1743 | ||
1744 | while (msec) | |
1745 | { | |
1746 | if (strcmp (msec->name, DWARF2_DEBUG_INFO) == 0) | |
1747 | return msec; | |
1748 | ||
1749 | if (strncmp (msec->name, GNU_LINKONCE_INFO, strlen (GNU_LINKONCE_INFO)) == 0) | |
1750 | return msec; | |
1751 | ||
1752 | msec = msec->next; | |
1753 | } | |
1754 | ||
1755 | return NULL; | |
1756 | } | |
1757 | ||
5e38c3b8 MM |
1758 | /* The DWARF2 version of find_nearest line. Return true if the line |
1759 | is found without error. ADDR_SIZE is the number of bytes in the | |
1760 | initial .debug_info length field and in the abbreviation offset. | |
1761 | You may use zero to indicate that the default value should be | |
1762 | used. */ | |
252b5132 RH |
1763 | |
1764 | boolean | |
1765 | _bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, | |
5e38c3b8 | 1766 | filename_ptr, functionname_ptr, |
e2f6d277 | 1767 | linenumber_ptr, addr_size, pinfo) |
252b5132 RH |
1768 | bfd *abfd; |
1769 | asection *section; | |
f2363ce5 | 1770 | asymbol **symbols; |
252b5132 RH |
1771 | bfd_vma offset; |
1772 | const char **filename_ptr; | |
1773 | const char **functionname_ptr; | |
1774 | unsigned int *linenumber_ptr; | |
5e38c3b8 | 1775 | unsigned int addr_size; |
51db3708 | 1776 | PTR *pinfo; |
252b5132 RH |
1777 | { |
1778 | /* Read each compilation unit from the section .debug_info, and check | |
1779 | to see if it contains the address we are searching for. If yes, | |
1780 | lookup the address, and return the line number info. If no, go | |
98591c73 | 1781 | on to the next compilation unit. |
252b5132 RH |
1782 | |
1783 | We keep a list of all the previously read compilation units, and | |
98591c73 | 1784 | a pointer to the next un-read compilation unit. Check the |
a092b084 | 1785 | previously read units before reading more. */ |
51db3708 | 1786 | struct dwarf2_debug *stash = (struct dwarf2_debug *) *pinfo; |
252b5132 | 1787 | |
a092b084 | 1788 | /* What address are we looking for? */ |
252b5132 RH |
1789 | bfd_vma addr = offset + section->vma; |
1790 | ||
1791 | struct comp_unit* each; | |
98591c73 | 1792 | |
252b5132 RH |
1793 | *filename_ptr = NULL; |
1794 | *functionname_ptr = NULL; | |
1795 | *linenumber_ptr = 0; | |
1796 | ||
5e38c3b8 MM |
1797 | /* The DWARF2 spec says that the initial length field, and the |
1798 | offset of the abbreviation table, should both be 4-byte values. | |
1799 | However, some compilers do things differently. */ | |
1800 | if (addr_size == 0) | |
1801 | addr_size = 4; | |
1efe4b10 | 1802 | BFD_ASSERT (addr_size == 4 || addr_size == 8); |
98591c73 | 1803 | |
252b5132 RH |
1804 | if (! stash) |
1805 | { | |
dc810e39 | 1806 | bfd_size_type total_size; |
252b5132 | 1807 | asection *msec; |
dc810e39 | 1808 | bfd_size_type amt = sizeof (struct dwarf2_debug); |
a092b084 | 1809 | |
dc810e39 | 1810 | stash = (struct dwarf2_debug*) bfd_zalloc (abfd, amt); |
252b5132 RH |
1811 | if (! stash) |
1812 | return false; | |
252b5132 | 1813 | |
51db3708 | 1814 | *pinfo = (PTR) stash; |
3fde5a36 | 1815 | |
a092b084 NC |
1816 | msec = find_debug_info (abfd, NULL); |
1817 | if (! msec) | |
1818 | /* No dwarf2 info. Note that at this point the stash | |
1819 | has been allocated, but contains zeros, this lets | |
1820 | future calls to this function fail quicker. */ | |
51db3708 | 1821 | return false; |
a092b084 NC |
1822 | |
1823 | /* There can be more than one DWARF2 info section in a BFD these days. | |
1824 | Read them all in and produce one large stash. We do this in two | |
1825 | passes - in the first pass we just accumulate the section sizes. | |
1826 | In the second pass we read in the section's contents. The allows | |
1827 | us to avoid reallocing the data as we add sections to the stash. */ | |
1828 | for (total_size = 0; msec; msec = find_debug_info (abfd, msec)) | |
1829 | total_size += msec->_raw_size; | |
98591c73 | 1830 | |
a092b084 NC |
1831 | stash->info_ptr = (char *) bfd_alloc (abfd, total_size); |
1832 | if (stash->info_ptr == NULL) | |
252b5132 RH |
1833 | return false; |
1834 | ||
a092b084 NC |
1835 | stash->info_ptr_end = stash->info_ptr; |
1836 | ||
1837 | for (msec = find_debug_info (abfd, NULL); | |
1838 | msec; | |
1839 | msec = find_debug_info (abfd, msec)) | |
252b5132 | 1840 | { |
dc810e39 AM |
1841 | bfd_size_type size; |
1842 | bfd_size_type start; | |
a092b084 NC |
1843 | |
1844 | size = msec->_raw_size; | |
1845 | if (size == 0) | |
1846 | continue; | |
1847 | ||
1848 | start = stash->info_ptr_end - stash->info_ptr; | |
1849 | ||
dc810e39 AM |
1850 | if (! bfd_get_section_contents (abfd, msec, stash->info_ptr + start, |
1851 | (bfd_vma) 0, size)) | |
a092b084 NC |
1852 | continue; |
1853 | ||
1854 | stash->info_ptr_end = stash->info_ptr + start + size; | |
252b5132 RH |
1855 | } |
1856 | ||
f2363ce5 AO |
1857 | BFD_ASSERT (stash->info_ptr_end == stash->info_ptr + total_size); |
1858 | ||
1859 | stash->sec = find_debug_info (abfd, NULL); | |
1860 | stash->sec_info_ptr = stash->info_ptr; | |
1861 | stash->syms = symbols; | |
252b5132 | 1862 | } |
a092b084 NC |
1863 | |
1864 | /* FIXME: There is a problem with the contents of the | |
1865 | .debug_info section. The 'low' and 'high' addresses of the | |
1866 | comp_units are computed by relocs against symbols in the | |
1867 | .text segment. We need these addresses in order to determine | |
1868 | the nearest line number, and so we have to resolve the | |
1869 | relocs. There is a similar problem when the .debug_line | |
1870 | section is processed as well (e.g., there may be relocs | |
1871 | against the operand of the DW_LNE_set_address operator). | |
98591c73 | 1872 | |
a092b084 | 1873 | Unfortunately getting hold of the reloc information is hard... |
98591c73 | 1874 | |
a092b084 NC |
1875 | For now, this means that disassembling object files (as |
1876 | opposed to fully executables) does not always work as well as | |
1877 | we would like. */ | |
98591c73 KH |
1878 | |
1879 | /* A null info_ptr indicates that there is no dwarf2 info | |
a092b084 | 1880 | (or that an error occured while setting up the stash). */ |
252b5132 RH |
1881 | if (! stash->info_ptr) |
1882 | return false; | |
1883 | ||
a092b084 | 1884 | /* Check the previously read comp. units first. */ |
252b5132 | 1885 | for (each = stash->all_comp_units; each; each = each->next_unit) |
f623be2b | 1886 | if (comp_unit_contains_address (each, addr)) |
98591c73 | 1887 | return comp_unit_find_nearest_line (each, addr, filename_ptr, |
51db3708 NC |
1888 | functionname_ptr, linenumber_ptr, |
1889 | stash); | |
252b5132 | 1890 | |
a092b084 | 1891 | /* Read each remaining comp. units checking each as they are read. */ |
252b5132 RH |
1892 | while (stash->info_ptr < stash->info_ptr_end) |
1893 | { | |
5e38c3b8 | 1894 | bfd_vma length; |
f623be2b | 1895 | boolean found; |
d03ba2a1 | 1896 | unsigned int offset_size = addr_size; |
252b5132 | 1897 | |
5e38c3b8 | 1898 | if (addr_size == 4) |
d03ba2a1 JJ |
1899 | { |
1900 | length = read_4_bytes (abfd, stash->info_ptr); | |
1901 | if (length == 0xffffffff) | |
1902 | { | |
1903 | offset_size = 8; | |
1904 | length = read_8_bytes (abfd, stash->info_ptr + 4); | |
1905 | stash->info_ptr += 8; | |
1906 | } | |
75936555 NC |
1907 | else if (length == 0) |
1908 | { | |
1909 | /* Handle (non-standard) 64-bit DWARF2 formats. */ | |
1910 | offset_size = 8; | |
1911 | length = read_4_bytes (abfd, stash->info_ptr + 4); | |
1912 | stash->info_ptr += 4; | |
1913 | } | |
d03ba2a1 | 1914 | } |
5e38c3b8 MM |
1915 | else |
1916 | length = read_8_bytes (abfd, stash->info_ptr); | |
1917 | stash->info_ptr += addr_size; | |
252b5132 RH |
1918 | |
1919 | if (length > 0) | |
1920 | { | |
d03ba2a1 | 1921 | each = parse_comp_unit (abfd, stash, length, offset_size); |
252b5132 RH |
1922 | stash->info_ptr += length; |
1923 | ||
f2363ce5 AO |
1924 | if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr) |
1925 | == stash->sec->_raw_size) | |
1926 | { | |
1927 | stash->sec = find_debug_info (abfd, stash->sec); | |
1928 | stash->sec_info_ptr = stash->info_ptr; | |
1929 | } | |
1930 | ||
252b5132 RH |
1931 | if (each) |
1932 | { | |
1933 | each->next_unit = stash->all_comp_units; | |
1934 | stash->all_comp_units = each; | |
1935 | ||
159002ff RH |
1936 | /* DW_AT_low_pc and DW_AT_high_pc are optional for |
1937 | compilation units. If we don't have them (i.e., | |
1938 | unit->high == 0), we need to consult the line info | |
1939 | table to see if a compilation unit contains the given | |
a092b084 | 1940 | address. */ |
f623be2b | 1941 | if (each->arange.high > 0) |
159002ff RH |
1942 | { |
1943 | if (comp_unit_contains_address (each, addr)) | |
1944 | return comp_unit_find_nearest_line (each, addr, | |
1945 | filename_ptr, | |
1946 | functionname_ptr, | |
51db3708 NC |
1947 | linenumber_ptr, |
1948 | stash); | |
159002ff RH |
1949 | } |
1950 | else | |
1951 | { | |
1952 | found = comp_unit_find_nearest_line (each, addr, | |
1953 | filename_ptr, | |
1954 | functionname_ptr, | |
51db3708 NC |
1955 | linenumber_ptr, |
1956 | stash); | |
159002ff RH |
1957 | if (found) |
1958 | return true; | |
1959 | } | |
252b5132 RH |
1960 | } |
1961 | } | |
1962 | } | |
1963 | ||
1964 | return false; | |
1965 | } |