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