Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* DWARF 2 support. |
5ed6aba4 | 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 |
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 | ||
b34976b6 | 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 *)); | |
b34976b6 | 242 | static bfd_boolean lookup_address_in_line_info_table |
1ee24f27 DJ |
243 | PARAMS ((struct line_info_table *, bfd_vma, struct funcinfo *, |
244 | const char **, unsigned int *)); | |
b34976b6 | 245 | static bfd_boolean lookup_address_in_function_table |
1ee24f27 | 246 | PARAMS ((struct funcinfo *, bfd_vma, struct funcinfo **, const char **)); |
b34976b6 | 247 | static bfd_boolean scan_unit_for_functions PARAMS ((struct comp_unit *)); |
a7b97311 AM |
248 | static struct comp_unit *parse_comp_unit |
249 | PARAMS ((bfd *, struct dwarf2_debug *, bfd_vma, unsigned int)); | |
b34976b6 | 250 | static bfd_boolean comp_unit_contains_address |
a7b97311 | 251 | PARAMS ((struct comp_unit *, bfd_vma)); |
b34976b6 | 252 | static bfd_boolean comp_unit_find_nearest_line |
a7b97311 AM |
253 | PARAMS ((struct comp_unit *, bfd_vma, const char **, const char **, |
254 | unsigned int *, struct dwarf2_debug *)); | |
255 | static asection *find_debug_info PARAMS ((bfd *, asection *)); | |
256 | ||
98591c73 KH |
257 | /* VERBATIM |
258 | The following function up to the END VERBATIM mark are | |
a092b084 | 259 | copied directly from dwarf2read.c. */ |
252b5132 | 260 | |
a092b084 | 261 | /* Read dwarf information from a buffer. */ |
252b5132 RH |
262 | |
263 | static unsigned int | |
264 | read_1_byte (abfd, buf) | |
7442e600 | 265 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
266 | char *buf; |
267 | { | |
268 | return bfd_get_8 (abfd, (bfd_byte *) buf); | |
269 | } | |
270 | ||
271 | static int | |
272 | read_1_signed_byte (abfd, buf) | |
7442e600 | 273 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
274 | char *buf; |
275 | { | |
276 | return bfd_get_signed_8 (abfd, (bfd_byte *) buf); | |
277 | } | |
278 | ||
279 | static unsigned int | |
280 | read_2_bytes (abfd, buf) | |
281 | bfd *abfd; | |
282 | char *buf; | |
283 | { | |
284 | return bfd_get_16 (abfd, (bfd_byte *) buf); | |
285 | } | |
286 | ||
a092b084 | 287 | #if 0 /* This is not used. */ |
252b5132 RH |
288 | |
289 | static int | |
290 | read_2_signed_bytes (abfd, buf) | |
291 | bfd *abfd; | |
292 | char *buf; | |
293 | { | |
294 | return bfd_get_signed_16 (abfd, (bfd_byte *) buf); | |
295 | } | |
296 | ||
297 | #endif | |
298 | ||
299 | static unsigned int | |
300 | read_4_bytes (abfd, buf) | |
301 | bfd *abfd; | |
302 | char *buf; | |
303 | { | |
304 | return bfd_get_32 (abfd, (bfd_byte *) buf); | |
305 | } | |
306 | ||
a092b084 | 307 | #if 0 /* This is not used. */ |
252b5132 RH |
308 | |
309 | static int | |
310 | read_4_signed_bytes (abfd, buf) | |
311 | bfd *abfd; | |
312 | char *buf; | |
313 | { | |
314 | return bfd_get_signed_32 (abfd, (bfd_byte *) buf); | |
315 | } | |
316 | ||
317 | #endif | |
318 | ||
d03ba2a1 | 319 | static bfd_vma |
252b5132 RH |
320 | read_8_bytes (abfd, buf) |
321 | bfd *abfd; | |
322 | char *buf; | |
323 | { | |
324 | return bfd_get_64 (abfd, (bfd_byte *) buf); | |
325 | } | |
326 | ||
327 | static char * | |
328 | read_n_bytes (abfd, buf, size) | |
7442e600 | 329 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 | 330 | char *buf; |
7442e600 | 331 | unsigned int size ATTRIBUTE_UNUSED; |
252b5132 RH |
332 | { |
333 | /* If the size of a host char is 8 bits, we can return a pointer | |
334 | to the buffer, otherwise we have to copy the data to a buffer | |
335 | allocated on the temporary obstack. */ | |
336 | return buf; | |
337 | } | |
338 | ||
339 | static char * | |
340 | read_string (abfd, buf, bytes_read_ptr) | |
7442e600 | 341 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
342 | char *buf; |
343 | unsigned int *bytes_read_ptr; | |
344 | { | |
d03ba2a1 | 345 | /* Return a pointer to the embedded string. */ |
252b5132 RH |
346 | if (*buf == '\0') |
347 | { | |
348 | *bytes_read_ptr = 1; | |
349 | return NULL; | |
350 | } | |
98591c73 | 351 | |
252b5132 RH |
352 | *bytes_read_ptr = strlen (buf) + 1; |
353 | return buf; | |
354 | } | |
355 | ||
d03ba2a1 JJ |
356 | static char * |
357 | read_indirect_string (unit, buf, bytes_read_ptr) | |
358 | struct comp_unit* unit; | |
359 | char *buf; | |
360 | unsigned int *bytes_read_ptr; | |
361 | { | |
362 | bfd_vma offset; | |
363 | struct dwarf2_debug *stash = unit->stash; | |
364 | ||
365 | if (unit->offset_size == 4) | |
366 | offset = read_4_bytes (unit->abfd, buf); | |
367 | else | |
368 | offset = read_8_bytes (unit->abfd, buf); | |
369 | *bytes_read_ptr = unit->offset_size; | |
370 | ||
371 | if (! stash->dwarf_str_buffer) | |
372 | { | |
373 | asection *msec; | |
374 | bfd *abfd = unit->abfd; | |
375 | ||
376 | msec = bfd_get_section_by_name (abfd, ".debug_str"); | |
377 | if (! msec) | |
378 | { | |
379 | (*_bfd_error_handler) | |
380 | (_("Dwarf Error: Can't find .debug_str section.")); | |
381 | bfd_set_error (bfd_error_bad_value); | |
382 | return NULL; | |
383 | } | |
384 | ||
385 | stash->dwarf_str_size = msec->_raw_size; | |
386 | stash->dwarf_str_buffer = (char*) bfd_alloc (abfd, msec->_raw_size); | |
387 | if (! stash->dwarf_abbrev_buffer) | |
388 | return NULL; | |
389 | ||
9f632188 AM |
390 | if (! bfd_get_section_contents (abfd, msec, stash->dwarf_str_buffer, |
391 | (bfd_vma) 0, msec->_raw_size)) | |
d03ba2a1 JJ |
392 | return NULL; |
393 | } | |
394 | ||
395 | if (offset >= stash->dwarf_str_size) | |
396 | { | |
f46c2da6 AM |
397 | (*_bfd_error_handler) (_("Dwarf Error: DW_FORM_strp offset (%lu) greater than or equal to .debug_str size (%lu)."), |
398 | (unsigned long) offset, stash->dwarf_str_size); | |
d03ba2a1 JJ |
399 | bfd_set_error (bfd_error_bad_value); |
400 | return NULL; | |
401 | } | |
402 | ||
e82ce529 | 403 | buf = stash->dwarf_str_buffer + offset; |
d03ba2a1 JJ |
404 | if (*buf == '\0') |
405 | return NULL; | |
406 | return buf; | |
407 | } | |
408 | ||
252b5132 RH |
409 | static unsigned int |
410 | read_unsigned_leb128 (abfd, buf, bytes_read_ptr) | |
7442e600 | 411 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
412 | char *buf; |
413 | unsigned int *bytes_read_ptr; | |
414 | { | |
415 | unsigned int result; | |
416 | unsigned int num_read; | |
417 | int shift; | |
418 | unsigned char byte; | |
419 | ||
420 | result = 0; | |
421 | shift = 0; | |
422 | num_read = 0; | |
98591c73 | 423 | |
252b5132 RH |
424 | do |
425 | { | |
426 | byte = bfd_get_8 (abfd, (bfd_byte *) buf); | |
427 | buf ++; | |
428 | num_read ++; | |
429 | result |= ((byte & 0x7f) << shift); | |
430 | shift += 7; | |
431 | } | |
432 | while (byte & 0x80); | |
98591c73 | 433 | |
252b5132 | 434 | * bytes_read_ptr = num_read; |
98591c73 | 435 | |
252b5132 RH |
436 | return result; |
437 | } | |
438 | ||
439 | static int | |
440 | read_signed_leb128 (abfd, buf, bytes_read_ptr) | |
7442e600 ILT |
441 | bfd *abfd ATTRIBUTE_UNUSED; |
442 | char *buf; | |
252b5132 RH |
443 | unsigned int * bytes_read_ptr; |
444 | { | |
445 | int result; | |
446 | int shift; | |
447 | int num_read; | |
448 | unsigned char byte; | |
449 | ||
450 | result = 0; | |
451 | shift = 0; | |
452 | num_read = 0; | |
453 | ||
454 | do | |
455 | { | |
456 | byte = bfd_get_8 (abfd, (bfd_byte *) buf); | |
457 | buf ++; | |
458 | num_read ++; | |
459 | result |= ((byte & 0x7f) << shift); | |
460 | shift += 7; | |
461 | } | |
462 | while (byte & 0x80); | |
98591c73 | 463 | |
252b5132 RH |
464 | if ((shift < 32) && (byte & 0x40)) |
465 | result |= -(1 << shift); | |
466 | ||
467 | * bytes_read_ptr = num_read; | |
98591c73 | 468 | |
252b5132 RH |
469 | return result; |
470 | } | |
471 | ||
472 | /* END VERBATIM */ | |
473 | ||
474 | static bfd_vma | |
475 | read_address (unit, buf) | |
476 | struct comp_unit* unit; | |
477 | char *buf; | |
478 | { | |
ecb651f0 | 479 | switch (unit->addr_size) |
252b5132 | 480 | { |
ecb651f0 NC |
481 | case 8: |
482 | return bfd_get_64 (unit->abfd, (bfd_byte *) buf); | |
483 | case 4: | |
484 | return bfd_get_32 (unit->abfd, (bfd_byte *) buf); | |
485 | case 2: | |
486 | return bfd_get_16 (unit->abfd, (bfd_byte *) buf); | |
487 | default: | |
488 | abort (); | |
252b5132 | 489 | } |
252b5132 RH |
490 | } |
491 | ||
252b5132 RH |
492 | /* Lookup an abbrev_info structure in the abbrev hash table. */ |
493 | ||
494 | static struct abbrev_info * | |
495 | lookup_abbrev (number,abbrevs) | |
496 | unsigned int number; | |
497 | struct abbrev_info **abbrevs; | |
498 | { | |
499 | unsigned int hash_number; | |
500 | struct abbrev_info *abbrev; | |
501 | ||
502 | hash_number = number % ABBREV_HASH_SIZE; | |
503 | abbrev = abbrevs[hash_number]; | |
504 | ||
505 | while (abbrev) | |
506 | { | |
507 | if (abbrev->number == number) | |
508 | return abbrev; | |
509 | else | |
510 | abbrev = abbrev->next; | |
511 | } | |
98591c73 | 512 | |
252b5132 RH |
513 | return NULL; |
514 | } | |
515 | ||
516 | /* In DWARF version 2, the description of the debugging information is | |
517 | stored in a separate .debug_abbrev section. Before we read any | |
518 | dies from a section we read in all abbreviations and install them | |
519 | in a hash table. */ | |
520 | ||
521 | static struct abbrev_info** | |
51db3708 | 522 | read_abbrevs (abfd, offset, stash) |
252b5132 | 523 | bfd * abfd; |
f46c2da6 | 524 | bfd_vma offset; |
51db3708 | 525 | struct dwarf2_debug *stash; |
252b5132 RH |
526 | { |
527 | struct abbrev_info **abbrevs; | |
528 | char *abbrev_ptr; | |
529 | struct abbrev_info *cur_abbrev; | |
530 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
531 | unsigned int abbrev_form, hash_number; | |
dc810e39 | 532 | bfd_size_type amt; |
252b5132 RH |
533 | |
534 | if (! stash->dwarf_abbrev_buffer) | |
535 | { | |
536 | asection *msec; | |
537 | ||
538 | msec = bfd_get_section_by_name (abfd, ".debug_abbrev"); | |
539 | if (! msec) | |
540 | { | |
541 | (*_bfd_error_handler) (_("Dwarf Error: Can't find .debug_abbrev section.")); | |
542 | bfd_set_error (bfd_error_bad_value); | |
543 | return 0; | |
544 | } | |
98591c73 | 545 | |
67d83c76 | 546 | stash->dwarf_abbrev_size = msec->_raw_size; |
6e84a906 DJ |
547 | stash->dwarf_abbrev_buffer |
548 | = bfd_simple_get_relocated_section_contents (abfd, msec, NULL, | |
549 | stash->syms); | |
252b5132 RH |
550 | if (! stash->dwarf_abbrev_buffer) |
551 | return 0; | |
252b5132 RH |
552 | } |
553 | ||
f5198f61 | 554 | if (offset >= stash->dwarf_abbrev_size) |
252b5132 | 555 | { |
f46c2da6 AM |
556 | (*_bfd_error_handler) (_("Dwarf Error: Abbrev offset (%lu) greater than or equal to .debug_abbrev size (%lu)."), |
557 | (unsigned long) offset, stash->dwarf_abbrev_size); | |
252b5132 RH |
558 | bfd_set_error (bfd_error_bad_value); |
559 | return 0; | |
560 | } | |
561 | ||
dc810e39 AM |
562 | amt = sizeof (struct abbrev_info*) * ABBREV_HASH_SIZE; |
563 | abbrevs = (struct abbrev_info**) bfd_zalloc (abfd, amt); | |
252b5132 RH |
564 | |
565 | abbrev_ptr = stash->dwarf_abbrev_buffer + offset; | |
566 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
567 | abbrev_ptr += bytes_read; | |
568 | ||
a092b084 | 569 | /* Loop until we reach an abbrev number of 0. */ |
252b5132 RH |
570 | while (abbrev_number) |
571 | { | |
dc810e39 AM |
572 | amt = sizeof (struct abbrev_info); |
573 | cur_abbrev = (struct abbrev_info *) bfd_zalloc (abfd, amt); | |
252b5132 | 574 | |
a092b084 | 575 | /* Read in abbrev header. */ |
252b5132 | 576 | cur_abbrev->number = abbrev_number; |
d45913a0 DA |
577 | cur_abbrev->tag = (enum dwarf_tag) |
578 | read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
252b5132 RH |
579 | abbrev_ptr += bytes_read; |
580 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
581 | abbrev_ptr += 1; | |
582 | ||
a092b084 | 583 | /* Now read in declarations. */ |
252b5132 RH |
584 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
585 | abbrev_ptr += bytes_read; | |
586 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
587 | abbrev_ptr += bytes_read; | |
98591c73 | 588 | |
252b5132 RH |
589 | while (abbrev_name) |
590 | { | |
591 | if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0) | |
592 | { | |
dc810e39 AM |
593 | amt = cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK; |
594 | amt *= sizeof (struct attr_abbrev); | |
595 | cur_abbrev->attrs = ((struct attr_abbrev *) | |
596 | bfd_realloc (cur_abbrev->attrs, amt)); | |
252b5132 RH |
597 | if (! cur_abbrev->attrs) |
598 | return 0; | |
599 | } | |
98591c73 | 600 | |
d45913a0 DA |
601 | cur_abbrev->attrs[cur_abbrev->num_attrs].name |
602 | = (enum dwarf_attribute) abbrev_name; | |
603 | cur_abbrev->attrs[cur_abbrev->num_attrs++].form | |
604 | = (enum dwarf_form) abbrev_form; | |
252b5132 RH |
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. | |
e82ce529 | 616 | Under Irix6 the abbreviations for a compilation unit are not |
252b5132 RH |
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 | |
d45913a0 | 648 | attr->form = (enum dwarf_form) form; |
98591c73 | 649 | |
cf716c56 | 650 | switch (form) |
252b5132 RH |
651 | { |
652 | case DW_FORM_addr: | |
0cc1cf99 | 653 | /* FIXME: DWARF3 draft says 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 | 755 | default: |
f46c2da6 | 756 | (*_bfd_error_handler) (_("Dwarf Error: Invalid or unhandled FORM value: %u."), |
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; | |
e82ce529 AM |
808 | struct line_info* last_line; /* largest VMA */ |
809 | struct line_info* lcl_head; /* local head; used in 'add_line_info' */ | |
252b5132 RH |
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 | ||
af3ef9fe NC |
820 | /* Adds a new entry to the line_info list in the line_info_table, ensuring |
821 | that the list is sorted. Note that the line_info list is sorted from | |
822 | highest to lowest VMA (with possible duplicates); that is, | |
823 | line_info->prev_line always accesses an equal or smaller VMA. */ | |
824 | ||
98591c73 | 825 | static void |
159002ff | 826 | add_line_info (table, address, filename, line, column, end_sequence) |
252b5132 RH |
827 | struct line_info_table* table; |
828 | bfd_vma address; | |
829 | char* filename; | |
830 | unsigned int line; | |
831 | unsigned int column; | |
159002ff | 832 | int end_sequence; |
252b5132 | 833 | { |
dc810e39 AM |
834 | bfd_size_type amt = sizeof (struct line_info); |
835 | struct line_info* info = (struct line_info*) bfd_alloc (table->abfd, amt); | |
252b5132 | 836 | |
e82ce529 AM |
837 | /* Find the correct location for 'info'. Normally we will receive |
838 | new line_info data 1) in order and 2) with increasing VMAs. | |
839 | However some compilers break the rules (cf. decode_line_info) and | |
840 | so we include some heuristics for quickly finding the correct | |
841 | location for 'info'. In particular, these heuristics optimize for | |
842 | the common case in which the VMA sequence that we receive is a | |
843 | list of locally sorted VMAs such as | |
844 | p...z a...j (where a < j < p < z) | |
252b5132 | 845 | |
e82ce529 AM |
846 | Note: table->lcl_head is used to head an *actual* or *possible* |
847 | sequence within the list (such as a...j) that is not directly | |
848 | headed by table->last_line | |
849 | ||
850 | Note: we may receive duplicate entries from 'decode_line_info'. */ | |
851 | ||
852 | while (1) | |
853 | if (!table->last_line | |
854 | || address >= table->last_line->address) | |
855 | { | |
856 | /* Normal case: add 'info' to the beginning of the list */ | |
857 | info->prev_line = table->last_line; | |
858 | table->last_line = info; | |
859 | ||
860 | /* lcl_head: initialize to head a *possible* sequence at the end. */ | |
861 | if (!table->lcl_head) | |
862 | table->lcl_head = info; | |
863 | break; | |
864 | } | |
865 | else if (!table->lcl_head->prev_line | |
866 | && table->lcl_head->address > address) | |
867 | { | |
868 | /* Abnormal but easy: lcl_head is 1) at the *end* of the line | |
869 | list and 2) the head of 'info'. */ | |
870 | info->prev_line = NULL; | |
871 | table->lcl_head->prev_line = info; | |
872 | break; | |
873 | } | |
874 | else if (table->lcl_head->prev_line | |
875 | && table->lcl_head->address > address | |
876 | && address >= table->lcl_head->prev_line->address) | |
877 | { | |
878 | /* Abnormal but easy: lcl_head is 1) in the *middle* of the line | |
879 | list and 2) the head of 'info'. */ | |
880 | info->prev_line = table->lcl_head->prev_line; | |
881 | table->lcl_head->prev_line = info; | |
882 | break; | |
883 | } | |
884 | else | |
885 | { | |
886 | /* Abnormal and hard: Neither 'last_line' nor 'lcl_head' are valid | |
887 | heads for 'info'. Reset 'lcl_head' and repeat. */ | |
888 | struct line_info* li2 = table->last_line; /* always non-NULL */ | |
889 | struct line_info* li1 = li2->prev_line; | |
890 | ||
891 | while (li1) | |
892 | { | |
893 | if (li2->address > address && address >= li1->address) | |
894 | break; | |
895 | ||
896 | li2 = li1; /* always non-NULL */ | |
897 | li1 = li1->prev_line; | |
898 | } | |
899 | table->lcl_head = li2; | |
900 | } | |
901 | ||
902 | /* Set member data of 'info'. */ | |
252b5132 | 903 | info->address = address; |
252b5132 RH |
904 | info->line = line; |
905 | info->column = column; | |
159002ff | 906 | info->end_sequence = end_sequence; |
d63fd5d1 NC |
907 | |
908 | amt = strlen (filename); | |
909 | if (amt) | |
910 | { | |
911 | info->filename = bfd_alloc (table->abfd, amt + 1); | |
912 | if (info->filename) | |
913 | strcpy (info->filename, filename); | |
914 | } | |
915 | else | |
916 | info->filename = NULL; | |
252b5132 RH |
917 | } |
918 | ||
5ed6aba4 | 919 | /* Extract a fully qualified filename from a line info table. |
af3ef9fe NC |
920 | The returned string has been malloc'ed and it is the caller's |
921 | responsibility to free it. */ | |
5ed6aba4 | 922 | |
a092b084 | 923 | static char * |
252b5132 RH |
924 | concat_filename (table, file) |
925 | struct line_info_table* table; | |
926 | unsigned int file; | |
927 | { | |
159002ff RH |
928 | char* filename; |
929 | ||
930 | if (file - 1 >= table->num_files) | |
931 | { | |
dcdea4f4 AM |
932 | (*_bfd_error_handler) |
933 | (_("Dwarf Error: mangled line number section (bad file number).")); | |
af3ef9fe | 934 | return strdup ("<unknown>"); |
159002ff RH |
935 | } |
936 | ||
937 | filename = table->files[file - 1].name; | |
5ed6aba4 | 938 | |
af3ef9fe | 939 | if (! IS_ABSOLUTE_PATH (filename)) |
252b5132 RH |
940 | { |
941 | char* dirname = (table->files[file - 1].dir | |
942 | ? table->dirs[table->files[file - 1].dir - 1] | |
943 | : table->comp_dir); | |
0dafd5f6 | 944 | |
af3ef9fe NC |
945 | /* Not all tools set DW_AT_comp_dir, so dirname may be unknown. |
946 | The best we can do is return the filename part. */ | |
947 | if (dirname != NULL) | |
948 | { | |
949 | unsigned int len = strlen (dirname) + strlen (filename) + 2; | |
950 | char * name; | |
951 | ||
952 | name = bfd_malloc (len); | |
953 | if (name) | |
954 | sprintf (name, "%s/%s", dirname, filename); | |
955 | return name; | |
956 | } | |
252b5132 | 957 | } |
af3ef9fe NC |
958 | |
959 | return strdup (filename); | |
252b5132 RH |
960 | } |
961 | ||
f623be2b RH |
962 | static void |
963 | arange_add (unit, low_pc, high_pc) | |
964 | struct comp_unit *unit; | |
965 | bfd_vma low_pc; | |
966 | bfd_vma high_pc; | |
967 | { | |
968 | struct arange *arange; | |
969 | ||
a092b084 | 970 | /* First see if we can cheaply extend an existing range. */ |
f623be2b | 971 | arange = &unit->arange; |
98591c73 | 972 | |
f623be2b RH |
973 | do |
974 | { | |
975 | if (low_pc == arange->high) | |
976 | { | |
977 | arange->high = high_pc; | |
978 | return; | |
979 | } | |
980 | if (high_pc == arange->low) | |
981 | { | |
982 | arange->low = low_pc; | |
983 | return; | |
984 | } | |
985 | arange = arange->next; | |
986 | } | |
987 | while (arange); | |
988 | ||
989 | if (unit->arange.high == 0) | |
990 | { | |
a092b084 | 991 | /* This is the first address range: store it in unit->arange. */ |
f623be2b RH |
992 | unit->arange.next = 0; |
993 | unit->arange.low = low_pc; | |
994 | unit->arange.high = high_pc; | |
995 | return; | |
996 | } | |
997 | ||
a092b084 | 998 | /* Need to allocate a new arange and insert it into the arange list. */ |
d45913a0 DA |
999 | arange = (struct arange *) |
1000 | bfd_zalloc (unit->abfd, (bfd_size_type) sizeof (*arange)); | |
f623be2b RH |
1001 | arange->low = low_pc; |
1002 | arange->high = high_pc; | |
1003 | ||
1004 | arange->next = unit->arange.next; | |
1005 | unit->arange.next = arange; | |
1006 | } | |
1007 | ||
a092b084 | 1008 | /* Decode the line number information for UNIT. */ |
252b5132 RH |
1009 | |
1010 | static struct line_info_table* | |
51db3708 | 1011 | decode_line_info (unit, stash) |
252b5132 | 1012 | struct comp_unit *unit; |
51db3708 | 1013 | struct dwarf2_debug *stash; |
252b5132 RH |
1014 | { |
1015 | bfd *abfd = unit->abfd; | |
252b5132 | 1016 | struct line_info_table* table; |
252b5132 RH |
1017 | char *line_ptr; |
1018 | char *line_end; | |
1019 | struct line_head lh; | |
d03ba2a1 | 1020 | unsigned int i, bytes_read, offset_size; |
252b5132 RH |
1021 | char *cur_file, *cur_dir; |
1022 | unsigned char op_code, extended_op, adj_opcode; | |
dc810e39 | 1023 | bfd_size_type amt; |
252b5132 | 1024 | |
69dd2e2d | 1025 | if (! stash->dwarf_line_buffer) |
252b5132 RH |
1026 | { |
1027 | asection *msec; | |
252b5132 RH |
1028 | |
1029 | msec = bfd_get_section_by_name (abfd, ".debug_line"); | |
1030 | if (! msec) | |
1031 | { | |
1032 | (*_bfd_error_handler) (_("Dwarf Error: Can't find .debug_line section.")); | |
1033 | bfd_set_error (bfd_error_bad_value); | |
1034 | return 0; | |
1035 | } | |
98591c73 | 1036 | |
ccdb16fc | 1037 | stash->dwarf_line_size = msec->_raw_size; |
6e84a906 DJ |
1038 | stash->dwarf_line_buffer |
1039 | = bfd_simple_get_relocated_section_contents (abfd, msec, NULL, | |
1040 | stash->syms); | |
f623be2b | 1041 | if (! stash->dwarf_line_buffer) |
252b5132 | 1042 | return 0; |
252b5132 RH |
1043 | } |
1044 | ||
6e84a906 DJ |
1045 | /* It is possible to get a bad value for the line_offset. Validate |
1046 | it here so that we won't get a segfault below. */ | |
ccdb16fc JW |
1047 | if (unit->line_offset >= stash->dwarf_line_size) |
1048 | { | |
f46c2da6 | 1049 | (*_bfd_error_handler) (_("Dwarf Error: Line offset (%lu) greater than or equal to .debug_line size (%lu)."), |
ccdb16fc JW |
1050 | unit->line_offset, stash->dwarf_line_size); |
1051 | bfd_set_error (bfd_error_bad_value); | |
1052 | return 0; | |
1053 | } | |
1054 | ||
dc810e39 AM |
1055 | amt = sizeof (struct line_info_table); |
1056 | table = (struct line_info_table*) bfd_alloc (abfd, amt); | |
252b5132 RH |
1057 | table->abfd = abfd; |
1058 | table->comp_dir = unit->comp_dir; | |
1059 | ||
1060 | table->num_files = 0; | |
1061 | table->files = NULL; | |
1062 | ||
1063 | table->num_dirs = 0; | |
1064 | table->dirs = NULL; | |
1065 | ||
159002ff RH |
1066 | table->files = NULL; |
1067 | table->last_line = NULL; | |
e82ce529 | 1068 | table->lcl_head = NULL; |
159002ff | 1069 | |
69dd2e2d | 1070 | line_ptr = stash->dwarf_line_buffer + unit->line_offset; |
252b5132 | 1071 | |
a092b084 | 1072 | /* Read in the prologue. */ |
91a4d569 AM |
1073 | lh.total_length = read_4_bytes (abfd, line_ptr); |
1074 | line_ptr += 4; | |
1075 | offset_size = 4; | |
1076 | if (lh.total_length == 0xffffffff) | |
dae2dd0d | 1077 | { |
dae2dd0d NC |
1078 | lh.total_length = read_8_bytes (abfd, line_ptr); |
1079 | line_ptr += 8; | |
1080 | offset_size = 8; | |
1081 | } | |
91a4d569 | 1082 | else if (lh.total_length == 0 && unit->addr_size == 8) |
d03ba2a1 | 1083 | { |
91a4d569 AM |
1084 | /* Handle (non-standard) 64-bit DWARF2 formats. */ |
1085 | lh.total_length = read_4_bytes (abfd, line_ptr); | |
1086 | line_ptr += 4; | |
d03ba2a1 JJ |
1087 | offset_size = 8; |
1088 | } | |
252b5132 RH |
1089 | line_end = line_ptr + lh.total_length; |
1090 | lh.version = read_2_bytes (abfd, line_ptr); | |
1091 | line_ptr += 2; | |
d03ba2a1 JJ |
1092 | if (offset_size == 4) |
1093 | lh.prologue_length = read_4_bytes (abfd, line_ptr); | |
1094 | else | |
1095 | lh.prologue_length = read_8_bytes (abfd, line_ptr); | |
1096 | line_ptr += offset_size; | |
252b5132 RH |
1097 | lh.minimum_instruction_length = read_1_byte (abfd, line_ptr); |
1098 | line_ptr += 1; | |
1099 | lh.default_is_stmt = read_1_byte (abfd, line_ptr); | |
1100 | line_ptr += 1; | |
1101 | lh.line_base = read_1_signed_byte (abfd, line_ptr); | |
1102 | line_ptr += 1; | |
1103 | lh.line_range = read_1_byte (abfd, line_ptr); | |
1104 | line_ptr += 1; | |
1105 | lh.opcode_base = read_1_byte (abfd, line_ptr); | |
1106 | line_ptr += 1; | |
dc810e39 AM |
1107 | amt = lh.opcode_base * sizeof (unsigned char); |
1108 | lh.standard_opcode_lengths = (unsigned char *) bfd_alloc (abfd, amt); | |
252b5132 RH |
1109 | |
1110 | lh.standard_opcode_lengths[0] = 1; | |
98591c73 | 1111 | |
252b5132 RH |
1112 | for (i = 1; i < lh.opcode_base; ++i) |
1113 | { | |
1114 | lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
1115 | line_ptr += 1; | |
1116 | } | |
1117 | ||
a092b084 | 1118 | /* Read directory table. */ |
252b5132 RH |
1119 | while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
1120 | { | |
1121 | line_ptr += bytes_read; | |
98591c73 | 1122 | |
252b5132 RH |
1123 | if ((table->num_dirs % DIR_ALLOC_CHUNK) == 0) |
1124 | { | |
dc810e39 AM |
1125 | amt = table->num_dirs + DIR_ALLOC_CHUNK; |
1126 | amt *= sizeof (char *); | |
1127 | table->dirs = (char **) bfd_realloc (table->dirs, amt); | |
252b5132 RH |
1128 | if (! table->dirs) |
1129 | return 0; | |
1130 | } | |
98591c73 | 1131 | |
252b5132 RH |
1132 | table->dirs[table->num_dirs++] = cur_dir; |
1133 | } | |
98591c73 | 1134 | |
252b5132 RH |
1135 | line_ptr += bytes_read; |
1136 | ||
a092b084 | 1137 | /* Read file name table. */ |
252b5132 RH |
1138 | while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL) |
1139 | { | |
1140 | line_ptr += bytes_read; | |
98591c73 | 1141 | |
252b5132 RH |
1142 | if ((table->num_files % FILE_ALLOC_CHUNK) == 0) |
1143 | { | |
dc810e39 AM |
1144 | amt = table->num_files + FILE_ALLOC_CHUNK; |
1145 | amt *= sizeof (struct fileinfo); | |
1146 | table->files = (struct fileinfo *) bfd_realloc (table->files, amt); | |
252b5132 RH |
1147 | if (! table->files) |
1148 | return 0; | |
1149 | } | |
98591c73 | 1150 | |
252b5132 RH |
1151 | table->files[table->num_files].name = cur_file; |
1152 | table->files[table->num_files].dir = | |
1153 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1154 | line_ptr += bytes_read; | |
1155 | table->files[table->num_files].time = | |
1156 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1157 | line_ptr += bytes_read; | |
1158 | table->files[table->num_files].size = | |
1159 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1160 | line_ptr += bytes_read; | |
1161 | table->num_files++; | |
1162 | } | |
98591c73 | 1163 | |
252b5132 RH |
1164 | line_ptr += bytes_read; |
1165 | ||
1166 | /* Read the statement sequences until there's nothing left. */ | |
1167 | while (line_ptr < line_end) | |
1168 | { | |
a092b084 | 1169 | /* State machine registers. */ |
252b5132 | 1170 | bfd_vma address = 0; |
e2f6d277 | 1171 | char * filename = concat_filename (table, 1); |
252b5132 RH |
1172 | unsigned int line = 1; |
1173 | unsigned int column = 0; | |
1174 | int is_stmt = lh.default_is_stmt; | |
1175 | int basic_block = 0; | |
e2f6d277 NC |
1176 | int end_sequence = 0; |
1177 | /* eraxxon@alumni.rice.edu: Against the DWARF2 specs, some | |
e82ce529 AM |
1178 | compilers generate address sequences that are wildly out of |
1179 | order using DW_LNE_set_address (e.g. Intel C++ 6.0 compiler | |
1180 | for ia64-Linux). Thus, to determine the low and high | |
1181 | address, we must compare on every DW_LNS_copy, etc. */ | |
e2f6d277 NC |
1182 | bfd_vma low_pc = 0; |
1183 | bfd_vma high_pc = 0; | |
252b5132 | 1184 | |
a092b084 | 1185 | /* Decode the table. */ |
252b5132 RH |
1186 | while (! end_sequence) |
1187 | { | |
1188 | op_code = read_1_byte (abfd, line_ptr); | |
1189 | line_ptr += 1; | |
98591c73 | 1190 | |
1a509dcc | 1191 | if (op_code >= lh.opcode_base) |
e2f6d277 NC |
1192 | { |
1193 | /* Special operand. */ | |
1a509dcc GK |
1194 | adj_opcode = op_code - lh.opcode_base; |
1195 | address += (adj_opcode / lh.line_range) | |
1196 | * lh.minimum_instruction_length; | |
1197 | line += lh.line_base + (adj_opcode % lh.line_range); | |
1198 | /* Append row to matrix using current values. */ | |
1199 | add_line_info (table, address, filename, line, column, 0); | |
1200 | basic_block = 1; | |
e2f6d277 NC |
1201 | if (low_pc == 0 || address < low_pc) |
1202 | low_pc = address; | |
1203 | if (address > high_pc) | |
1204 | high_pc = address; | |
1a509dcc GK |
1205 | } |
1206 | else switch (op_code) | |
252b5132 RH |
1207 | { |
1208 | case DW_LNS_extended_op: | |
e2f6d277 NC |
1209 | /* Ignore length. */ |
1210 | line_ptr += 1; | |
252b5132 RH |
1211 | extended_op = read_1_byte (abfd, line_ptr); |
1212 | line_ptr += 1; | |
e2f6d277 | 1213 | |
252b5132 RH |
1214 | switch (extended_op) |
1215 | { | |
1216 | case DW_LNE_end_sequence: | |
1217 | end_sequence = 1; | |
f623be2b RH |
1218 | add_line_info (table, address, filename, line, column, |
1219 | end_sequence); | |
e2f6d277 NC |
1220 | if (low_pc == 0 || address < low_pc) |
1221 | low_pc = address; | |
1222 | if (address > high_pc) | |
1223 | high_pc = address; | |
a2ce5bdc | 1224 | arange_add (unit, low_pc, high_pc); |
252b5132 RH |
1225 | break; |
1226 | case DW_LNE_set_address: | |
1227 | address = read_address (unit, line_ptr); | |
1228 | line_ptr += unit->addr_size; | |
1229 | break; | |
1230 | case DW_LNE_define_file: | |
1231 | cur_file = read_string (abfd, line_ptr, &bytes_read); | |
1232 | line_ptr += bytes_read; | |
1233 | if ((table->num_files % FILE_ALLOC_CHUNK) == 0) | |
1234 | { | |
dc810e39 AM |
1235 | amt = table->num_files + FILE_ALLOC_CHUNK; |
1236 | amt *= sizeof (struct fileinfo); | |
1237 | table->files = | |
1238 | (struct fileinfo *) bfd_realloc (table->files, amt); | |
252b5132 RH |
1239 | if (! table->files) |
1240 | return 0; | |
1241 | } | |
1242 | table->files[table->num_files].name = cur_file; | |
1243 | table->files[table->num_files].dir = | |
1244 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1245 | line_ptr += bytes_read; | |
1246 | table->files[table->num_files].time = | |
1247 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1248 | line_ptr += bytes_read; | |
1249 | table->files[table->num_files].size = | |
1250 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1251 | line_ptr += bytes_read; | |
1252 | table->num_files++; | |
1253 | break; | |
1254 | default: | |
1255 | (*_bfd_error_handler) (_("Dwarf Error: mangled line number section.")); | |
1256 | bfd_set_error (bfd_error_bad_value); | |
1257 | return 0; | |
1258 | } | |
1259 | break; | |
1260 | case DW_LNS_copy: | |
159002ff | 1261 | add_line_info (table, address, filename, line, column, 0); |
252b5132 | 1262 | basic_block = 0; |
e2f6d277 NC |
1263 | if (low_pc == 0 || address < low_pc) |
1264 | low_pc = address; | |
1265 | if (address > high_pc) | |
1266 | high_pc = address; | |
252b5132 RH |
1267 | break; |
1268 | case DW_LNS_advance_pc: | |
1269 | address += lh.minimum_instruction_length | |
1270 | * read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1271 | line_ptr += bytes_read; | |
1272 | break; | |
1273 | case DW_LNS_advance_line: | |
1274 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
1275 | line_ptr += bytes_read; | |
1276 | break; | |
1277 | case DW_LNS_set_file: | |
1278 | { | |
1279 | unsigned int file; | |
1280 | ||
e2f6d277 NC |
1281 | /* The file and directory tables are 0 |
1282 | based, the references are 1 based. */ | |
252b5132 RH |
1283 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
1284 | line_ptr += bytes_read; | |
af3ef9fe NC |
1285 | if (filename) |
1286 | free (filename); | |
252b5132 RH |
1287 | filename = concat_filename (table, file); |
1288 | break; | |
1289 | } | |
1290 | case DW_LNS_set_column: | |
1291 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1292 | line_ptr += bytes_read; | |
1293 | break; | |
1294 | case DW_LNS_negate_stmt: | |
1295 | is_stmt = (!is_stmt); | |
1296 | break; | |
1297 | case DW_LNS_set_basic_block: | |
1298 | basic_block = 1; | |
1299 | break; | |
1300 | case DW_LNS_const_add_pc: | |
159002ff RH |
1301 | address += lh.minimum_instruction_length |
1302 | * ((255 - lh.opcode_base) / lh.line_range); | |
252b5132 RH |
1303 | break; |
1304 | case DW_LNS_fixed_advance_pc: | |
1305 | address += read_2_bytes (abfd, line_ptr); | |
1306 | line_ptr += 2; | |
1307 | break; | |
1a509dcc | 1308 | default: |
e2f6d277 | 1309 | { |
1a509dcc | 1310 | int i; |
5ed6aba4 | 1311 | |
e2f6d277 | 1312 | /* Unknown standard opcode, ignore it. */ |
1a509dcc GK |
1313 | for (i = 0; i < lh.standard_opcode_lengths[op_code]; i++) |
1314 | { | |
1315 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
1316 | line_ptr += bytes_read; | |
1317 | } | |
1318 | } | |
252b5132 RH |
1319 | } |
1320 | } | |
5ed6aba4 | 1321 | |
af3ef9fe NC |
1322 | if (filename) |
1323 | free (filename); | |
252b5132 RH |
1324 | } |
1325 | ||
1326 | return table; | |
1327 | } | |
1328 | ||
b34976b6 AM |
1329 | /* If ADDR is within TABLE set the output parameters and return TRUE, |
1330 | otherwise return FALSE. The output parameters, FILENAME_PTR and | |
a092b084 | 1331 | LINENUMBER_PTR, are pointers to the objects to be filled in. */ |
252b5132 | 1332 | |
b34976b6 | 1333 | static bfd_boolean |
e2f6d277 | 1334 | lookup_address_in_line_info_table (table, addr, function, filename_ptr, |
252b5132 RH |
1335 | linenumber_ptr) |
1336 | struct line_info_table* table; | |
1337 | bfd_vma addr; | |
1ee24f27 | 1338 | struct funcinfo *function; |
252b5132 RH |
1339 | const char **filename_ptr; |
1340 | unsigned int *linenumber_ptr; | |
1341 | { | |
e82ce529 | 1342 | /* Note: table->last_line should be a descendingly sorted list. */ |
159002ff | 1343 | struct line_info* next_line = table->last_line; |
e82ce529 AM |
1344 | struct line_info* each_line = NULL; |
1345 | *filename_ptr = NULL; | |
98591c73 | 1346 | |
159002ff | 1347 | if (!next_line) |
b34976b6 | 1348 | return FALSE; |
159002ff RH |
1349 | |
1350 | each_line = next_line->prev_line; | |
1351 | ||
e82ce529 AM |
1352 | /* Check for large addresses */ |
1353 | if (addr > next_line->address) | |
1354 | each_line = NULL; /* ensure we skip over the normal case */ | |
1355 | ||
1356 | /* Normal case: search the list; save */ | |
159002ff | 1357 | while (each_line && next_line) |
252b5132 | 1358 | { |
e82ce529 AM |
1359 | /* If we have an address match, save this info. This allows us |
1360 | to return as good as results as possible for strange debugging | |
1361 | info. */ | |
b34976b6 | 1362 | bfd_boolean addr_match = FALSE; |
e82ce529 | 1363 | if (each_line->address <= addr && addr <= next_line->address) |
252b5132 | 1364 | { |
b34976b6 | 1365 | addr_match = TRUE; |
e82ce529 | 1366 | |
1ee24f27 DJ |
1367 | /* If this line appears to span functions, and addr is in the |
1368 | later function, return the first line of that function instead | |
1369 | of the last line of the earlier one. This check is for GCC | |
1370 | 2.95, which emits the first line number for a function late. */ | |
1371 | if (function != NULL | |
1372 | && each_line->address < function->low | |
1373 | && next_line->address > function->low) | |
1374 | { | |
1375 | *filename_ptr = next_line->filename; | |
1376 | *linenumber_ptr = next_line->line; | |
1377 | } | |
1378 | else | |
1379 | { | |
1380 | *filename_ptr = each_line->filename; | |
1381 | *linenumber_ptr = each_line->line; | |
1382 | } | |
252b5132 | 1383 | } |
e82ce529 AM |
1384 | |
1385 | if (addr_match && !each_line->end_sequence) | |
b34976b6 | 1386 | return TRUE; /* we have definitely found what we want */ |
e82ce529 | 1387 | |
159002ff RH |
1388 | next_line = each_line; |
1389 | each_line = each_line->prev_line; | |
252b5132 | 1390 | } |
98591c73 | 1391 | |
e82ce529 AM |
1392 | /* At this point each_line is NULL but next_line is not. If we found |
1393 | a candidate end-of-sequence point in the loop above, we can return | |
1394 | that (compatibility with a bug in the Intel compiler); otherwise, | |
1395 | assuming that we found the containing function for this address in | |
1396 | this compilation unit, return the first line we have a number for | |
1397 | (compatibility with GCC 2.95). */ | |
1398 | if (*filename_ptr == NULL && function != NULL) | |
1ee24f27 DJ |
1399 | { |
1400 | *filename_ptr = next_line->filename; | |
1401 | *linenumber_ptr = next_line->line; | |
b34976b6 | 1402 | return TRUE; |
1ee24f27 DJ |
1403 | } |
1404 | ||
b34976b6 | 1405 | return FALSE; |
252b5132 | 1406 | } |
98591c73 | 1407 | |
a092b084 | 1408 | /* Function table functions. */ |
252b5132 | 1409 | |
b34976b6 | 1410 | /* If ADDR is within TABLE, set FUNCTIONNAME_PTR, and return TRUE. */ |
252b5132 | 1411 | |
b34976b6 | 1412 | static bfd_boolean |
e2f6d277 | 1413 | lookup_address_in_function_table (table, addr, function_ptr, |
252b5132 RH |
1414 | functionname_ptr) |
1415 | struct funcinfo* table; | |
1416 | bfd_vma addr; | |
1ee24f27 | 1417 | struct funcinfo** function_ptr; |
252b5132 RH |
1418 | const char **functionname_ptr; |
1419 | { | |
1420 | struct funcinfo* each_func; | |
1421 | ||
1422 | for (each_func = table; | |
1423 | each_func; | |
1424 | each_func = each_func->prev_func) | |
1425 | { | |
1426 | if (addr >= each_func->low && addr < each_func->high) | |
1427 | { | |
1428 | *functionname_ptr = each_func->name; | |
1ee24f27 | 1429 | *function_ptr = each_func; |
b34976b6 | 1430 | return TRUE; |
252b5132 RH |
1431 | } |
1432 | } | |
98591c73 | 1433 | |
b34976b6 | 1434 | return FALSE; |
252b5132 RH |
1435 | } |
1436 | ||
a092b084 | 1437 | /* DWARF2 Compilation unit functions. */ |
252b5132 RH |
1438 | |
1439 | /* Scan over each die in a comp. unit looking for functions to add | |
a092b084 | 1440 | to the function table. */ |
252b5132 | 1441 | |
b34976b6 | 1442 | static bfd_boolean |
252b5132 RH |
1443 | scan_unit_for_functions (unit) |
1444 | struct comp_unit *unit; | |
1445 | { | |
1446 | bfd *abfd = unit->abfd; | |
1447 | char *info_ptr = unit->first_child_die_ptr; | |
1448 | int nesting_level = 1; | |
1449 | ||
1450 | while (nesting_level) | |
1451 | { | |
1452 | unsigned int abbrev_number, bytes_read, i; | |
1453 | struct abbrev_info *abbrev; | |
1454 | struct attribute attr; | |
1455 | struct funcinfo *func; | |
1456 | char* name = 0; | |
1457 | ||
1458 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
1459 | info_ptr += bytes_read; | |
1460 | ||
1461 | if (! abbrev_number) | |
1462 | { | |
1463 | nesting_level--; | |
1464 | continue; | |
1465 | } | |
98591c73 | 1466 | |
252b5132 RH |
1467 | abbrev = lookup_abbrev (abbrev_number,unit->abbrevs); |
1468 | if (! abbrev) | |
1469 | { | |
f46c2da6 | 1470 | (*_bfd_error_handler) (_("Dwarf Error: Could not find abbrev number %u."), |
252b5132 RH |
1471 | abbrev_number); |
1472 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1473 | return FALSE; |
252b5132 | 1474 | } |
98591c73 | 1475 | |
252b5132 RH |
1476 | if (abbrev->tag == DW_TAG_subprogram) |
1477 | { | |
dc810e39 AM |
1478 | bfd_size_type amt = sizeof (struct funcinfo); |
1479 | func = (struct funcinfo *) bfd_zalloc (abfd, amt); | |
252b5132 RH |
1480 | func->prev_func = unit->function_table; |
1481 | unit->function_table = func; | |
1482 | } | |
1483 | else | |
1484 | func = NULL; | |
98591c73 | 1485 | |
252b5132 RH |
1486 | for (i = 0; i < abbrev->num_attrs; ++i) |
1487 | { | |
1488 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr); | |
98591c73 | 1489 | |
252b5132 RH |
1490 | if (func) |
1491 | { | |
1492 | switch (attr.name) | |
1493 | { | |
1494 | case DW_AT_name: | |
98591c73 | 1495 | |
252b5132 RH |
1496 | name = DW_STRING (&attr); |
1497 | ||
1498 | /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */ | |
1499 | if (func->name == NULL) | |
1500 | func->name = DW_STRING (&attr); | |
1501 | break; | |
98591c73 | 1502 | |
252b5132 RH |
1503 | case DW_AT_MIPS_linkage_name: |
1504 | func->name = DW_STRING (&attr); | |
1505 | break; | |
1506 | ||
1507 | case DW_AT_low_pc: | |
1508 | func->low = DW_ADDR (&attr); | |
1509 | break; | |
1510 | ||
1511 | case DW_AT_high_pc: | |
1512 | func->high = DW_ADDR (&attr); | |
1513 | break; | |
1514 | ||
1515 | default: | |
1516 | break; | |
1517 | } | |
1518 | } | |
1519 | else | |
1520 | { | |
1521 | switch (attr.name) | |
1522 | { | |
1523 | case DW_AT_name: | |
1524 | name = DW_STRING (&attr); | |
1525 | break; | |
98591c73 | 1526 | |
252b5132 RH |
1527 | default: |
1528 | break; | |
1529 | } | |
1530 | } | |
1531 | } | |
1532 | ||
1533 | if (abbrev->has_children) | |
1534 | nesting_level++; | |
1535 | } | |
1536 | ||
b34976b6 | 1537 | return TRUE; |
252b5132 RH |
1538 | } |
1539 | ||
5e38c3b8 MM |
1540 | /* Parse a DWARF2 compilation unit starting at INFO_PTR. This |
1541 | includes the compilation unit header that proceeds the DIE's, but | |
1542 | does not include the length field that preceeds each compilation | |
1543 | unit header. END_PTR points one past the end of this comp unit. | |
d03ba2a1 | 1544 | OFFSET_SIZE is the size of DWARF2 offsets (either 4 or 8 bytes). |
252b5132 RH |
1545 | |
1546 | This routine does not read the whole compilation unit; only enough | |
1547 | to get to the line number information for the compilation unit. */ | |
1548 | ||
1549 | static struct comp_unit * | |
d03ba2a1 | 1550 | parse_comp_unit (abfd, stash, unit_length, offset_size) |
252b5132 | 1551 | bfd* abfd; |
51db3708 NC |
1552 | struct dwarf2_debug *stash; |
1553 | bfd_vma unit_length; | |
d03ba2a1 | 1554 | unsigned int offset_size; |
252b5132 RH |
1555 | { |
1556 | struct comp_unit* unit; | |
f46c2da6 AM |
1557 | unsigned int version; |
1558 | bfd_vma abbrev_offset = 0; | |
1559 | unsigned int addr_size; | |
252b5132 | 1560 | struct abbrev_info** abbrevs; |
252b5132 RH |
1561 | unsigned int abbrev_number, bytes_read, i; |
1562 | struct abbrev_info *abbrev; | |
1563 | struct attribute attr; | |
51db3708 NC |
1564 | char *info_ptr = stash->info_ptr; |
1565 | char *end_ptr = info_ptr + unit_length; | |
dc810e39 | 1566 | bfd_size_type amt; |
3fde5a36 | 1567 | |
252b5132 RH |
1568 | version = read_2_bytes (abfd, info_ptr); |
1569 | info_ptr += 2; | |
d03ba2a1 JJ |
1570 | BFD_ASSERT (offset_size == 4 || offset_size == 8); |
1571 | if (offset_size == 4) | |
5e38c3b8 | 1572 | abbrev_offset = read_4_bytes (abfd, info_ptr); |
d03ba2a1 | 1573 | else |
5e38c3b8 | 1574 | abbrev_offset = read_8_bytes (abfd, info_ptr); |
d03ba2a1 | 1575 | info_ptr += offset_size; |
252b5132 RH |
1576 | addr_size = read_1_byte (abfd, info_ptr); |
1577 | info_ptr += 1; | |
1578 | ||
1579 | if (version != 2) | |
1580 | { | |
f46c2da6 | 1581 | (*_bfd_error_handler) (_("Dwarf Error: found dwarf version '%u', this reader only handles version 2 information."), version); |
252b5132 RH |
1582 | bfd_set_error (bfd_error_bad_value); |
1583 | return 0; | |
1584 | } | |
1585 | ||
1586 | if (addr_size > sizeof (bfd_vma)) | |
1587 | { | |
1588 | (*_bfd_error_handler) (_("Dwarf Error: found address size '%u', this reader can not handle sizes greater than '%u'."), | |
1589 | addr_size, | |
f46c2da6 | 1590 | (unsigned int) sizeof (bfd_vma)); |
252b5132 RH |
1591 | bfd_set_error (bfd_error_bad_value); |
1592 | return 0; | |
1593 | } | |
1594 | ||
ecb651f0 | 1595 | if (addr_size != 2 && addr_size != 4 && addr_size != 8) |
252b5132 | 1596 | { |
f5a3e38a | 1597 | (*_bfd_error_handler) ("Dwarf Error: found address size '%u', this reader can only handle address sizes '2', '4' and '8'.", addr_size); |
252b5132 RH |
1598 | bfd_set_error (bfd_error_bad_value); |
1599 | return 0; | |
1600 | } | |
1601 | ||
a092b084 | 1602 | /* Read the abbrevs for this compilation unit into a table. */ |
51db3708 | 1603 | abbrevs = read_abbrevs (abfd, abbrev_offset, stash); |
252b5132 RH |
1604 | if (! abbrevs) |
1605 | return 0; | |
1606 | ||
1607 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
1608 | info_ptr += bytes_read; | |
1609 | if (! abbrev_number) | |
1610 | { | |
f46c2da6 | 1611 | (*_bfd_error_handler) (_("Dwarf Error: Bad abbrev number: %u."), |
252b5132 RH |
1612 | abbrev_number); |
1613 | bfd_set_error (bfd_error_bad_value); | |
1614 | return 0; | |
1615 | } | |
1616 | ||
1617 | abbrev = lookup_abbrev (abbrev_number, abbrevs); | |
1618 | if (! abbrev) | |
1619 | { | |
f46c2da6 | 1620 | (*_bfd_error_handler) (_("Dwarf Error: Could not find abbrev number %u."), |
252b5132 RH |
1621 | abbrev_number); |
1622 | bfd_set_error (bfd_error_bad_value); | |
1623 | return 0; | |
1624 | } | |
98591c73 | 1625 | |
dc810e39 AM |
1626 | amt = sizeof (struct comp_unit); |
1627 | unit = (struct comp_unit*) bfd_zalloc (abfd, amt); | |
252b5132 | 1628 | unit->abfd = abfd; |
98591c73 | 1629 | unit->addr_size = addr_size; |
d03ba2a1 | 1630 | unit->offset_size = offset_size; |
252b5132 RH |
1631 | unit->abbrevs = abbrevs; |
1632 | unit->end_ptr = end_ptr; | |
d03ba2a1 | 1633 | unit->stash = stash; |
252b5132 RH |
1634 | |
1635 | for (i = 0; i < abbrev->num_attrs; ++i) | |
1636 | { | |
1637 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr); | |
1638 | ||
1639 | /* Store the data if it is of an attribute we want to keep in a | |
1640 | partial symbol table. */ | |
1641 | switch (attr.name) | |
1642 | { | |
1643 | case DW_AT_stmt_list: | |
1644 | unit->stmtlist = 1; | |
1645 | unit->line_offset = DW_UNSND (&attr); | |
1646 | break; | |
1647 | ||
1648 | case DW_AT_name: | |
1649 | unit->name = DW_STRING (&attr); | |
1650 | break; | |
1651 | ||
1652 | case DW_AT_low_pc: | |
f623be2b | 1653 | unit->arange.low = DW_ADDR (&attr); |
252b5132 RH |
1654 | break; |
1655 | ||
1656 | case DW_AT_high_pc: | |
f623be2b | 1657 | unit->arange.high = DW_ADDR (&attr); |
252b5132 RH |
1658 | break; |
1659 | ||
1660 | case DW_AT_comp_dir: | |
1661 | { | |
1662 | char* comp_dir = DW_STRING (&attr); | |
1663 | if (comp_dir) | |
1664 | { | |
1665 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
1666 | directory, get rid of it. */ | |
1667 | char *cp = (char*) strchr (comp_dir, ':'); | |
1668 | ||
1669 | if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/') | |
1670 | comp_dir = cp + 1; | |
1671 | } | |
1672 | unit->comp_dir = comp_dir; | |
1673 | break; | |
1674 | } | |
1675 | ||
1676 | default: | |
1677 | break; | |
1678 | } | |
1679 | } | |
1680 | ||
1681 | unit->first_child_die_ptr = info_ptr; | |
1682 | return unit; | |
1683 | } | |
1684 | ||
b34976b6 | 1685 | /* Return TRUE if UNIT contains the address given by ADDR. */ |
252b5132 | 1686 | |
b34976b6 | 1687 | static bfd_boolean |
252b5132 RH |
1688 | comp_unit_contains_address (unit, addr) |
1689 | struct comp_unit* unit; | |
1690 | bfd_vma addr; | |
1691 | { | |
f623be2b RH |
1692 | struct arange *arange; |
1693 | ||
1694 | if (unit->error) | |
b34976b6 | 1695 | return FALSE; |
f623be2b RH |
1696 | |
1697 | arange = &unit->arange; | |
1698 | do | |
1699 | { | |
1700 | if (addr >= arange->low && addr < arange->high) | |
b34976b6 | 1701 | return TRUE; |
f623be2b RH |
1702 | arange = arange->next; |
1703 | } | |
1704 | while (arange); | |
98591c73 | 1705 | |
b34976b6 | 1706 | return FALSE; |
252b5132 RH |
1707 | } |
1708 | ||
252b5132 RH |
1709 | /* If UNIT contains ADDR, set the output parameters to the values for |
1710 | the line containing ADDR. The output parameters, FILENAME_PTR, | |
1711 | FUNCTIONNAME_PTR, and LINENUMBER_PTR, are pointers to the objects | |
98591c73 | 1712 | to be filled in. |
252b5132 | 1713 | |
ab3acfbe | 1714 | Return TRUE if UNIT contains ADDR, and no errors were encountered; |
b34976b6 | 1715 | FALSE otherwise. */ |
252b5132 | 1716 | |
b34976b6 | 1717 | static bfd_boolean |
e2f6d277 NC |
1718 | comp_unit_find_nearest_line (unit, addr, filename_ptr, functionname_ptr, |
1719 | linenumber_ptr, stash) | |
252b5132 RH |
1720 | struct comp_unit* unit; |
1721 | bfd_vma addr; | |
1722 | const char **filename_ptr; | |
1723 | const char **functionname_ptr; | |
1724 | unsigned int *linenumber_ptr; | |
51db3708 | 1725 | struct dwarf2_debug *stash; |
252b5132 | 1726 | { |
b34976b6 AM |
1727 | bfd_boolean line_p; |
1728 | bfd_boolean func_p; | |
1ee24f27 | 1729 | struct funcinfo *function; |
98591c73 | 1730 | |
252b5132 | 1731 | if (unit->error) |
b34976b6 | 1732 | return FALSE; |
252b5132 RH |
1733 | |
1734 | if (! unit->line_table) | |
1735 | { | |
1736 | if (! unit->stmtlist) | |
1737 | { | |
1738 | unit->error = 1; | |
b34976b6 | 1739 | return FALSE; |
252b5132 | 1740 | } |
98591c73 | 1741 | |
51db3708 | 1742 | unit->line_table = decode_line_info (unit, stash); |
252b5132 RH |
1743 | |
1744 | if (! unit->line_table) | |
1745 | { | |
1746 | unit->error = 1; | |
b34976b6 | 1747 | return FALSE; |
252b5132 | 1748 | } |
98591c73 | 1749 | |
3f5864e1 | 1750 | if (unit->first_child_die_ptr < unit->end_ptr |
e82ce529 | 1751 | && ! scan_unit_for_functions (unit)) |
252b5132 RH |
1752 | { |
1753 | unit->error = 1; | |
b34976b6 | 1754 | return FALSE; |
252b5132 RH |
1755 | } |
1756 | } | |
1757 | ||
1ee24f27 | 1758 | function = NULL; |
e2f6d277 NC |
1759 | func_p = lookup_address_in_function_table (unit->function_table, addr, |
1760 | &function, functionname_ptr); | |
1761 | line_p = lookup_address_in_line_info_table (unit->line_table, addr, | |
1762 | function, filename_ptr, | |
252b5132 | 1763 | linenumber_ptr); |
b34976b6 | 1764 | return line_p || func_p; |
252b5132 RH |
1765 | } |
1766 | ||
e2f6d277 NC |
1767 | /* Locate a section in a BFD containing debugging info. The search starts |
1768 | from the section after AFTER_SEC, or from the first section in the BFD if | |
1769 | AFTER_SEC is NULL. The search works by examining the names of the | |
1770 | sections. There are two permissiable names. The first is .debug_info. | |
1771 | This is the standard DWARF2 name. The second is a prefix .gnu.linkonce.wi. | |
1772 | This is a variation on the .debug_info section which has a checksum | |
1773 | describing the contents appended onto the name. This allows the linker to | |
1774 | identify and discard duplicate debugging sections for different | |
1775 | compilation units. */ | |
a092b084 NC |
1776 | #define DWARF2_DEBUG_INFO ".debug_info" |
1777 | #define GNU_LINKONCE_INFO ".gnu.linkonce.wi." | |
1778 | ||
1779 | static asection * | |
1780 | find_debug_info (abfd, after_sec) | |
1781 | bfd * abfd; | |
1782 | asection * after_sec; | |
1783 | { | |
1784 | asection * msec; | |
1785 | ||
1786 | if (after_sec) | |
1787 | msec = after_sec->next; | |
1788 | else | |
1789 | msec = abfd->sections; | |
1790 | ||
1791 | while (msec) | |
1792 | { | |
1793 | if (strcmp (msec->name, DWARF2_DEBUG_INFO) == 0) | |
1794 | return msec; | |
1795 | ||
1796 | if (strncmp (msec->name, GNU_LINKONCE_INFO, strlen (GNU_LINKONCE_INFO)) == 0) | |
1797 | return msec; | |
1798 | ||
1799 | msec = msec->next; | |
1800 | } | |
1801 | ||
1802 | return NULL; | |
1803 | } | |
1804 | ||
b34976b6 | 1805 | /* The DWARF2 version of find_nearest line. Return TRUE if the line |
5e38c3b8 MM |
1806 | is found without error. ADDR_SIZE is the number of bytes in the |
1807 | initial .debug_info length field and in the abbreviation offset. | |
1808 | You may use zero to indicate that the default value should be | |
1809 | used. */ | |
252b5132 | 1810 | |
b34976b6 | 1811 | bfd_boolean |
252b5132 | 1812 | _bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, |
5e38c3b8 | 1813 | filename_ptr, functionname_ptr, |
e2f6d277 | 1814 | linenumber_ptr, addr_size, pinfo) |
252b5132 RH |
1815 | bfd *abfd; |
1816 | asection *section; | |
f2363ce5 | 1817 | asymbol **symbols; |
252b5132 RH |
1818 | bfd_vma offset; |
1819 | const char **filename_ptr; | |
1820 | const char **functionname_ptr; | |
1821 | unsigned int *linenumber_ptr; | |
5e38c3b8 | 1822 | unsigned int addr_size; |
51db3708 | 1823 | PTR *pinfo; |
252b5132 RH |
1824 | { |
1825 | /* Read each compilation unit from the section .debug_info, and check | |
1826 | to see if it contains the address we are searching for. If yes, | |
1827 | lookup the address, and return the line number info. If no, go | |
98591c73 | 1828 | on to the next compilation unit. |
252b5132 RH |
1829 | |
1830 | We keep a list of all the previously read compilation units, and | |
98591c73 | 1831 | a pointer to the next un-read compilation unit. Check the |
a092b084 | 1832 | previously read units before reading more. */ |
51db3708 | 1833 | struct dwarf2_debug *stash = (struct dwarf2_debug *) *pinfo; |
252b5132 | 1834 | |
a092b084 | 1835 | /* What address are we looking for? */ |
252b5132 RH |
1836 | bfd_vma addr = offset + section->vma; |
1837 | ||
1838 | struct comp_unit* each; | |
98591c73 | 1839 | |
252b5132 RH |
1840 | *filename_ptr = NULL; |
1841 | *functionname_ptr = NULL; | |
1842 | *linenumber_ptr = 0; | |
1843 | ||
5e38c3b8 MM |
1844 | /* The DWARF2 spec says that the initial length field, and the |
1845 | offset of the abbreviation table, should both be 4-byte values. | |
1846 | However, some compilers do things differently. */ | |
1847 | if (addr_size == 0) | |
1848 | addr_size = 4; | |
1efe4b10 | 1849 | BFD_ASSERT (addr_size == 4 || addr_size == 8); |
98591c73 | 1850 | |
252b5132 RH |
1851 | if (! stash) |
1852 | { | |
dc810e39 | 1853 | bfd_size_type total_size; |
252b5132 | 1854 | asection *msec; |
dc810e39 | 1855 | bfd_size_type amt = sizeof (struct dwarf2_debug); |
a092b084 | 1856 | |
dc810e39 | 1857 | stash = (struct dwarf2_debug*) bfd_zalloc (abfd, amt); |
252b5132 | 1858 | if (! stash) |
b34976b6 | 1859 | return FALSE; |
252b5132 | 1860 | |
51db3708 | 1861 | *pinfo = (PTR) stash; |
3fde5a36 | 1862 | |
a092b084 NC |
1863 | msec = find_debug_info (abfd, NULL); |
1864 | if (! msec) | |
1865 | /* No dwarf2 info. Note that at this point the stash | |
1866 | has been allocated, but contains zeros, this lets | |
1867 | future calls to this function fail quicker. */ | |
b34976b6 | 1868 | return FALSE; |
a092b084 NC |
1869 | |
1870 | /* There can be more than one DWARF2 info section in a BFD these days. | |
e82ce529 | 1871 | Read them all in and produce one large stash. We do this in two |
a092b084 NC |
1872 | passes - in the first pass we just accumulate the section sizes. |
1873 | In the second pass we read in the section's contents. The allows | |
1874 | us to avoid reallocing the data as we add sections to the stash. */ | |
1875 | for (total_size = 0; msec; msec = find_debug_info (abfd, msec)) | |
1876 | total_size += msec->_raw_size; | |
98591c73 | 1877 | |
a092b084 NC |
1878 | stash->info_ptr = (char *) bfd_alloc (abfd, total_size); |
1879 | if (stash->info_ptr == NULL) | |
b34976b6 | 1880 | return FALSE; |
252b5132 | 1881 | |
a092b084 NC |
1882 | stash->info_ptr_end = stash->info_ptr; |
1883 | ||
1884 | for (msec = find_debug_info (abfd, NULL); | |
1885 | msec; | |
1886 | msec = find_debug_info (abfd, msec)) | |
252b5132 | 1887 | { |
dc810e39 AM |
1888 | bfd_size_type size; |
1889 | bfd_size_type start; | |
a092b084 NC |
1890 | |
1891 | size = msec->_raw_size; | |
1892 | if (size == 0) | |
1893 | continue; | |
1894 | ||
1895 | start = stash->info_ptr_end - stash->info_ptr; | |
1896 | ||
6e84a906 DJ |
1897 | if ((bfd_simple_get_relocated_section_contents |
1898 | (abfd, msec, stash->info_ptr + start, symbols)) == NULL) | |
a092b084 NC |
1899 | continue; |
1900 | ||
1901 | stash->info_ptr_end = stash->info_ptr + start + size; | |
252b5132 RH |
1902 | } |
1903 | ||
f2363ce5 AO |
1904 | BFD_ASSERT (stash->info_ptr_end == stash->info_ptr + total_size); |
1905 | ||
1906 | stash->sec = find_debug_info (abfd, NULL); | |
1907 | stash->sec_info_ptr = stash->info_ptr; | |
1908 | stash->syms = symbols; | |
252b5132 | 1909 | } |
a092b084 | 1910 | |
98591c73 | 1911 | /* A null info_ptr indicates that there is no dwarf2 info |
a092b084 | 1912 | (or that an error occured while setting up the stash). */ |
252b5132 | 1913 | if (! stash->info_ptr) |
b34976b6 | 1914 | return FALSE; |
252b5132 | 1915 | |
a092b084 | 1916 | /* Check the previously read comp. units first. */ |
252b5132 | 1917 | for (each = stash->all_comp_units; each; each = each->next_unit) |
f623be2b | 1918 | if (comp_unit_contains_address (each, addr)) |
98591c73 | 1919 | return comp_unit_find_nearest_line (each, addr, filename_ptr, |
51db3708 NC |
1920 | functionname_ptr, linenumber_ptr, |
1921 | stash); | |
252b5132 | 1922 | |
a092b084 | 1923 | /* Read each remaining comp. units checking each as they are read. */ |
252b5132 RH |
1924 | while (stash->info_ptr < stash->info_ptr_end) |
1925 | { | |
5e38c3b8 | 1926 | bfd_vma length; |
b34976b6 | 1927 | bfd_boolean found; |
d03ba2a1 | 1928 | unsigned int offset_size = addr_size; |
252b5132 | 1929 | |
a3805e4e AO |
1930 | length = read_4_bytes (abfd, stash->info_ptr); |
1931 | /* A 0xffffff length is the DWARF3 way of indicating we use | |
1932 | 64-bit offsets, instead of 32-bit offsets. */ | |
1933 | if (length == 0xffffffff) | |
d03ba2a1 | 1934 | { |
a3805e4e AO |
1935 | offset_size = 8; |
1936 | length = read_8_bytes (abfd, stash->info_ptr + 4); | |
1937 | stash->info_ptr += 12; | |
1938 | } | |
1939 | /* A zero length is the IRIX way of indicating 64-bit offsets, | |
1940 | mostly because the 64-bit length will generally fit in 32 | |
1941 | bits, and the endianness helps. */ | |
1942 | else if (length == 0) | |
1943 | { | |
1944 | offset_size = 8; | |
1945 | length = read_4_bytes (abfd, stash->info_ptr + 4); | |
1946 | stash->info_ptr += 8; | |
1947 | } | |
1948 | /* In the absence of the hints above, we assume addr_size-sized | |
1949 | offsets, for backward-compatibility with pre-DWARF3 64-bit | |
1950 | platforms. */ | |
1951 | else if (addr_size == 8) | |
1952 | { | |
1953 | length = read_8_bytes (abfd, stash->info_ptr); | |
060dc71d | 1954 | stash->info_ptr += 8; |
d03ba2a1 | 1955 | } |
5e38c3b8 | 1956 | else |
a3805e4e | 1957 | stash->info_ptr += 4; |
252b5132 RH |
1958 | |
1959 | if (length > 0) | |
e82ce529 | 1960 | { |
d03ba2a1 | 1961 | each = parse_comp_unit (abfd, stash, length, offset_size); |
252b5132 RH |
1962 | stash->info_ptr += length; |
1963 | ||
f2363ce5 AO |
1964 | if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr) |
1965 | == stash->sec->_raw_size) | |
1966 | { | |
1967 | stash->sec = find_debug_info (abfd, stash->sec); | |
1968 | stash->sec_info_ptr = stash->info_ptr; | |
1969 | } | |
1970 | ||
252b5132 RH |
1971 | if (each) |
1972 | { | |
1973 | each->next_unit = stash->all_comp_units; | |
1974 | stash->all_comp_units = each; | |
1975 | ||
159002ff RH |
1976 | /* DW_AT_low_pc and DW_AT_high_pc are optional for |
1977 | compilation units. If we don't have them (i.e., | |
1978 | unit->high == 0), we need to consult the line info | |
1979 | table to see if a compilation unit contains the given | |
a092b084 | 1980 | address. */ |
f623be2b | 1981 | if (each->arange.high > 0) |
159002ff RH |
1982 | { |
1983 | if (comp_unit_contains_address (each, addr)) | |
1984 | return comp_unit_find_nearest_line (each, addr, | |
6e84a906 DJ |
1985 | filename_ptr, |
1986 | functionname_ptr, | |
1987 | linenumber_ptr, | |
1988 | stash); | |
159002ff RH |
1989 | } |
1990 | else | |
1991 | { | |
1992 | found = comp_unit_find_nearest_line (each, addr, | |
1993 | filename_ptr, | |
1994 | functionname_ptr, | |
51db3708 NC |
1995 | linenumber_ptr, |
1996 | stash); | |
159002ff | 1997 | if (found) |
b34976b6 | 1998 | return TRUE; |
159002ff | 1999 | } |
252b5132 RH |
2000 | } |
2001 | } | |
2002 | } | |
2003 | ||
b34976b6 | 2004 | return FALSE; |
252b5132 | 2005 | } |