Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* DWARF 2 support. |
219d1afa | 2 | Copyright (C) 1994-2018 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | Adapted from gdb/dwarf2read.c by Gavin Koch of Cygnus Solutions | |
5 | (gavin@cygnus.com). | |
6 | ||
7 | From the dwarf2read.c header: | |
8 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
9 | Inc. with support from Florida State University (under contract | |
10 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
11 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
12 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
13 | support in dwarfread.c | |
14 | ||
e2f6d277 | 15 | This file is part of BFD. |
252b5132 | 16 | |
e2f6d277 NC |
17 | This program is free software; you can redistribute it and/or modify |
18 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 19 | the Free Software Foundation; either version 3 of the License, or (at |
e2f6d277 | 20 | your option) any later version. |
252b5132 | 21 | |
e2f6d277 NC |
22 | This program is distributed in the hope that it will be useful, but |
23 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
25 | General Public License for more details. | |
252b5132 | 26 | |
e2f6d277 NC |
27 | You should have received a copy of the GNU General Public License |
28 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
29 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
30 | MA 02110-1301, USA. */ | |
252b5132 | 31 | |
252b5132 | 32 | #include "sysdep.h" |
3db64b00 | 33 | #include "bfd.h" |
252b5132 RH |
34 | #include "libiberty.h" |
35 | #include "libbfd.h" | |
36 | #include "elf-bfd.h" | |
fa8f86ff | 37 | #include "dwarf2.h" |
252b5132 RH |
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 | 46 | unsigned char minimum_instruction_length; |
a233b20c | 47 | unsigned char maximum_ops_per_insn; |
a092b084 NC |
48 | unsigned char default_is_stmt; |
49 | int line_base; | |
50 | unsigned char line_range; | |
51 | unsigned char opcode_base; | |
52 | unsigned char *standard_opcode_lengths; | |
53 | }; | |
54 | ||
55 | /* Attributes have a name and a value. */ | |
56 | ||
252b5132 | 57 | struct attribute |
a092b084 NC |
58 | { |
59 | enum dwarf_attribute name; | |
60 | enum dwarf_form form; | |
61 | union | |
252b5132 | 62 | { |
a092b084 NC |
63 | char *str; |
64 | struct dwarf_block *blk; | |
8ce8c090 AM |
65 | bfd_uint64_t val; |
66 | bfd_int64_t sval; | |
a092b084 NC |
67 | } |
68 | u; | |
69 | }; | |
70 | ||
98591c73 | 71 | /* Blocks are a bunch of untyped bytes. */ |
252b5132 | 72 | struct dwarf_block |
a092b084 NC |
73 | { |
74 | unsigned int size; | |
f075ee0c | 75 | bfd_byte *data; |
a092b084 | 76 | }; |
252b5132 | 77 | |
5609a71e | 78 | struct adjusted_section |
d4c32a81 L |
79 | { |
80 | asection *section; | |
81 | bfd_vma adj_vma; | |
82 | }; | |
83 | ||
a092b084 NC |
84 | struct dwarf2_debug |
85 | { | |
86 | /* A list of all previously read comp_units. */ | |
f075ee0c | 87 | struct comp_unit *all_comp_units; |
252b5132 | 88 | |
bd210d54 NC |
89 | /* Last comp unit in list above. */ |
90 | struct comp_unit *last_comp_unit; | |
91 | ||
fc28f9aa TG |
92 | /* Names of the debug sections. */ |
93 | const struct dwarf_debug_section *debug_sections; | |
94 | ||
252b5132 RH |
95 | /* The next unread compilation unit within the .debug_info section. |
96 | Zero indicates that the .debug_info section has not been loaded | |
a092b084 | 97 | into a buffer yet. */ |
f075ee0c | 98 | bfd_byte *info_ptr; |
252b5132 | 99 | |
a092b084 | 100 | /* Pointer to the end of the .debug_info section memory buffer. */ |
f075ee0c | 101 | bfd_byte *info_ptr_end; |
252b5132 | 102 | |
90ed9b8b AB |
103 | /* Pointer to the original bfd for which debug was loaded. This is what |
104 | we use to compare and so check that the cached debug data is still | |
105 | valid - it saves having to possibly dereference the gnu_debuglink each | |
106 | time. */ | |
107 | bfd *orig_bfd; | |
108 | ||
0d161102 NC |
109 | /* Pointer to the bfd, section and address of the beginning of the |
110 | section. The bfd might be different than expected because of | |
111 | gnu_debuglink sections. */ | |
a50b1753 | 112 | bfd *bfd_ptr; |
f075ee0c AM |
113 | asection *sec; |
114 | bfd_byte *sec_info_ptr; | |
f2363ce5 | 115 | |
95e34fb4 NC |
116 | /* Support for alternate debug info sections created by the DWZ utility: |
117 | This includes a pointer to an alternate bfd which contains *extra*, | |
118 | possibly duplicate debug sections, and pointers to the loaded | |
119 | .debug_str and .debug_info sections from this bfd. */ | |
07d6d2b8 AM |
120 | bfd * alt_bfd_ptr; |
121 | bfd_byte * alt_dwarf_str_buffer; | |
122 | bfd_size_type alt_dwarf_str_size; | |
123 | bfd_byte * alt_dwarf_info_buffer; | |
124 | bfd_size_type alt_dwarf_info_size; | |
95e34fb4 | 125 | |
aaf30c25 CS |
126 | /* A pointer to the memory block allocated for info_ptr. Neither |
127 | info_ptr nor sec_info_ptr are guaranteed to stay pointing to the | |
1b86808a | 128 | beginning of the malloc block. */ |
aaf30c25 CS |
129 | bfd_byte *info_ptr_memory; |
130 | ||
f2363ce5 | 131 | /* Pointer to the symbol table. */ |
f075ee0c | 132 | asymbol **syms; |
f2363ce5 | 133 | |
a092b084 | 134 | /* Pointer to the .debug_abbrev section loaded into memory. */ |
f075ee0c | 135 | bfd_byte *dwarf_abbrev_buffer; |
252b5132 | 136 | |
a092b084 | 137 | /* Length of the loaded .debug_abbrev section. */ |
3076cd1f | 138 | bfd_size_type dwarf_abbrev_size; |
69dd2e2d RH |
139 | |
140 | /* Buffer for decode_line_info. */ | |
f075ee0c | 141 | bfd_byte *dwarf_line_buffer; |
ccdb16fc JW |
142 | |
143 | /* Length of the loaded .debug_line section. */ | |
3076cd1f | 144 | bfd_size_type dwarf_line_size; |
d03ba2a1 JJ |
145 | |
146 | /* Pointer to the .debug_str section loaded into memory. */ | |
f075ee0c | 147 | bfd_byte *dwarf_str_buffer; |
d03ba2a1 JJ |
148 | |
149 | /* Length of the loaded .debug_str section. */ | |
3076cd1f | 150 | bfd_size_type dwarf_str_size; |
a13afe8e | 151 | |
0041f7df JK |
152 | /* Pointer to the .debug_line_str section loaded into memory. */ |
153 | bfd_byte *dwarf_line_str_buffer; | |
154 | ||
155 | /* Length of the loaded .debug_line_str section. */ | |
156 | bfd_size_type dwarf_line_str_size; | |
157 | ||
089e3718 | 158 | /* Pointer to the .debug_ranges section loaded into memory. */ |
a13afe8e FF |
159 | bfd_byte *dwarf_ranges_buffer; |
160 | ||
089e3718 | 161 | /* Length of the loaded .debug_ranges section. */ |
3076cd1f | 162 | bfd_size_type dwarf_ranges_size; |
4ab527b0 FF |
163 | |
164 | /* If the most recent call to bfd_find_nearest_line was given an | |
165 | address in an inlined function, preserve a pointer into the | |
166 | calling chain for subsequent calls to bfd_find_inliner_info to | |
089e3718 | 167 | use. */ |
4ab527b0 | 168 | struct funcinfo *inliner_chain; |
d4c32a81 | 169 | |
cd0449ab AM |
170 | /* Section VMAs at the time the stash was built. */ |
171 | bfd_vma *sec_vma; | |
172 | ||
5609a71e | 173 | /* Number of sections whose VMA we must adjust. */ |
93ee1e36 | 174 | int adjusted_section_count; |
d4c32a81 | 175 | |
5609a71e DJ |
176 | /* Array of sections with adjusted VMA. */ |
177 | struct adjusted_section *adjusted_sections; | |
bd210d54 NC |
178 | |
179 | /* Number of times find_line is called. This is used in | |
180 | the heuristic for enabling the info hash tables. */ | |
181 | int info_hash_count; | |
182 | ||
183 | #define STASH_INFO_HASH_TRIGGER 100 | |
184 | ||
185 | /* Hash table mapping symbol names to function infos. */ | |
186 | struct info_hash_table *funcinfo_hash_table; | |
187 | ||
188 | /* Hash table mapping symbol names to variable infos. */ | |
189 | struct info_hash_table *varinfo_hash_table; | |
190 | ||
191 | /* Head of comp_unit list in the last hash table update. */ | |
192 | struct comp_unit *hash_units_head; | |
193 | ||
194 | /* Status of info hash. */ | |
195 | int info_hash_status; | |
07d6d2b8 AM |
196 | #define STASH_INFO_HASH_OFF 0 |
197 | #define STASH_INFO_HASH_ON 1 | |
bd210d54 | 198 | #define STASH_INFO_HASH_DISABLED 2 |
1c37913d AM |
199 | |
200 | /* True if we opened bfd_ptr. */ | |
201 | bfd_boolean close_on_cleanup; | |
252b5132 RH |
202 | }; |
203 | ||
a092b084 NC |
204 | struct arange |
205 | { | |
f623be2b RH |
206 | struct arange *next; |
207 | bfd_vma low; | |
208 | bfd_vma high; | |
209 | }; | |
252b5132 | 210 | |
252b5132 | 211 | /* A minimal decoding of DWARF2 compilation units. We only decode |
a092b084 | 212 | what's needed to get to the line number information. */ |
252b5132 | 213 | |
a092b084 NC |
214 | struct comp_unit |
215 | { | |
216 | /* Chain the previously read compilation units. */ | |
f075ee0c | 217 | struct comp_unit *next_unit; |
252b5132 | 218 | |
bd210d54 NC |
219 | /* Likewise, chain the compilation unit read after this one. |
220 | The comp units are stored in reversed reading order. */ | |
221 | struct comp_unit *prev_unit; | |
222 | ||
2ae727ad | 223 | /* Keep the bfd convenient (for memory allocation). */ |
f075ee0c | 224 | bfd *abfd; |
252b5132 | 225 | |
709d67f1 AM |
226 | /* The lowest and highest addresses contained in this compilation |
227 | unit as specified in the compilation unit header. */ | |
228 | struct arange arange; | |
252b5132 | 229 | |
a092b084 | 230 | /* The DW_AT_name attribute (for error messages). */ |
f075ee0c | 231 | char *name; |
252b5132 | 232 | |
a092b084 | 233 | /* The abbrev hash table. */ |
f075ee0c | 234 | struct abbrev_info **abbrevs; |
252b5132 | 235 | |
e00e8198 AM |
236 | /* DW_AT_language. */ |
237 | int lang; | |
238 | ||
a092b084 | 239 | /* Note that an error was found by comp_unit_find_nearest_line. */ |
252b5132 RH |
240 | int error; |
241 | ||
a092b084 | 242 | /* The DW_AT_comp_dir attribute. */ |
f075ee0c | 243 | char *comp_dir; |
252b5132 | 244 | |
b34976b6 | 245 | /* TRUE if there is a line number table associated with this comp. unit. */ |
252b5132 | 246 | int stmtlist; |
98591c73 | 247 | |
c0c28ab8 L |
248 | /* Pointer to the current comp_unit so that we can find a given entry |
249 | by its reference. */ | |
f075ee0c | 250 | bfd_byte *info_ptr_unit; |
c0c28ab8 | 251 | |
a092b084 | 252 | /* The offset into .debug_line of the line number table. */ |
252b5132 RH |
253 | unsigned long line_offset; |
254 | ||
a092b084 | 255 | /* Pointer to the first child die for the comp unit. */ |
f075ee0c | 256 | bfd_byte *first_child_die_ptr; |
252b5132 | 257 | |
a092b084 | 258 | /* The end of the comp unit. */ |
f075ee0c | 259 | bfd_byte *end_ptr; |
252b5132 | 260 | |
a092b084 | 261 | /* The decoded line number, NULL if not yet decoded. */ |
f075ee0c | 262 | struct line_info_table *line_table; |
252b5132 | 263 | |
a092b084 | 264 | /* A list of the functions found in this comp. unit. */ |
f075ee0c | 265 | struct funcinfo *function_table; |
252b5132 | 266 | |
089e3718 IT |
267 | /* A table of function information references searchable by address. */ |
268 | struct lookup_funcinfo *lookup_funcinfo_table; | |
269 | ||
270 | /* Number of functions in the function_table and sorted_function_table. */ | |
271 | bfd_size_type number_of_functions; | |
272 | ||
5420f73d L |
273 | /* A list of the variables found in this comp. unit. */ |
274 | struct varinfo *variable_table; | |
275 | ||
d03ba2a1 JJ |
276 | /* Pointer to dwarf2_debug structure. */ |
277 | struct dwarf2_debug *stash; | |
278 | ||
5609a71e DJ |
279 | /* DWARF format version for this unit - from unit header. */ |
280 | int version; | |
281 | ||
a092b084 | 282 | /* Address size for this unit - from unit header. */ |
252b5132 | 283 | unsigned char addr_size; |
d03ba2a1 JJ |
284 | |
285 | /* Offset size for this unit - from unit header. */ | |
286 | unsigned char offset_size; | |
a13afe8e FF |
287 | |
288 | /* Base address for this unit - from DW_AT_low_pc attribute of | |
289 | DW_TAG_compile_unit DIE */ | |
290 | bfd_vma base_address; | |
bd210d54 NC |
291 | |
292 | /* TRUE if symbols are cached in hash table for faster lookup by name. */ | |
293 | bfd_boolean cached; | |
252b5132 RH |
294 | }; |
295 | ||
a7b97311 AM |
296 | /* This data structure holds the information of an abbrev. */ |
297 | struct abbrev_info | |
298 | { | |
299 | unsigned int number; /* Number identifying abbrev. */ | |
300 | enum dwarf_tag tag; /* DWARF tag. */ | |
301 | int has_children; /* Boolean. */ | |
302 | unsigned int num_attrs; /* Number of attributes. */ | |
303 | struct attr_abbrev *attrs; /* An array of attribute descriptions. */ | |
304 | struct abbrev_info *next; /* Next in chain. */ | |
305 | }; | |
306 | ||
307 | struct attr_abbrev | |
308 | { | |
309 | enum dwarf_attribute name; | |
310 | enum dwarf_form form; | |
0041f7df | 311 | bfd_vma implicit_const; |
a7b97311 AM |
312 | }; |
313 | ||
4a114e3e L |
314 | /* Map of uncompressed DWARF debug section name to compressed one. It |
315 | is terminated by NULL uncompressed_name. */ | |
316 | ||
e4c93b56 | 317 | const struct dwarf_debug_section dwarf_debug_sections[] = |
4a114e3e L |
318 | { |
319 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
320 | { ".debug_aranges", ".zdebug_aranges" }, | |
321 | { ".debug_frame", ".zdebug_frame" }, | |
322 | { ".debug_info", ".zdebug_info" }, | |
95e34fb4 | 323 | { ".debug_info", ".zdebug_info" }, |
4a114e3e L |
324 | { ".debug_line", ".zdebug_line" }, |
325 | { ".debug_loc", ".zdebug_loc" }, | |
326 | { ".debug_macinfo", ".zdebug_macinfo" }, | |
4ccf1e31 | 327 | { ".debug_macro", ".zdebug_macro" }, |
4a114e3e L |
328 | { ".debug_pubnames", ".zdebug_pubnames" }, |
329 | { ".debug_pubtypes", ".zdebug_pubtypes" }, | |
330 | { ".debug_ranges", ".zdebug_ranges" }, | |
331 | { ".debug_static_func", ".zdebug_static_func" }, | |
332 | { ".debug_static_vars", ".zdebug_static_vars" }, | |
333 | { ".debug_str", ".zdebug_str", }, | |
95e34fb4 | 334 | { ".debug_str", ".zdebug_str", }, |
0041f7df | 335 | { ".debug_line_str", ".zdebug_line_str", }, |
4a114e3e L |
336 | { ".debug_types", ".zdebug_types" }, |
337 | /* GNU DWARF 1 extensions */ | |
338 | { ".debug_sfnames", ".zdebug_sfnames" }, | |
339 | { ".debug_srcinfo", ".zebug_srcinfo" }, | |
340 | /* SGI/MIPS DWARF 2 extensions */ | |
341 | { ".debug_funcnames", ".zdebug_funcnames" }, | |
342 | { ".debug_typenames", ".zdebug_typenames" }, | |
343 | { ".debug_varnames", ".zdebug_varnames" }, | |
344 | { ".debug_weaknames", ".zdebug_weaknames" }, | |
345 | { NULL, NULL }, | |
346 | }; | |
347 | ||
95e34fb4 NC |
348 | /* NB/ Numbers in this enum must match up with indicies |
349 | into the dwarf_debug_sections[] array above. */ | |
4a114e3e L |
350 | enum dwarf_debug_section_enum |
351 | { | |
352 | debug_abbrev = 0, | |
353 | debug_aranges, | |
354 | debug_frame, | |
355 | debug_info, | |
95e34fb4 | 356 | debug_info_alt, |
4a114e3e L |
357 | debug_line, |
358 | debug_loc, | |
359 | debug_macinfo, | |
4ccf1e31 | 360 | debug_macro, |
4a114e3e L |
361 | debug_pubnames, |
362 | debug_pubtypes, | |
363 | debug_ranges, | |
364 | debug_static_func, | |
365 | debug_static_vars, | |
366 | debug_str, | |
95e34fb4 | 367 | debug_str_alt, |
0041f7df | 368 | debug_line_str, |
4a114e3e L |
369 | debug_types, |
370 | debug_sfnames, | |
371 | debug_srcinfo, | |
372 | debug_funcnames, | |
373 | debug_typenames, | |
374 | debug_varnames, | |
0041f7df JK |
375 | debug_weaknames, |
376 | debug_max | |
4a114e3e L |
377 | }; |
378 | ||
0041f7df JK |
379 | /* A static assertion. */ |
380 | extern int dwarf_debug_section_assert[ARRAY_SIZE (dwarf_debug_sections) | |
381 | == debug_max + 1 ? 1 : -1]; | |
382 | ||
a7b97311 AM |
383 | #ifndef ABBREV_HASH_SIZE |
384 | #define ABBREV_HASH_SIZE 121 | |
385 | #endif | |
386 | #ifndef ATTR_ALLOC_CHUNK | |
387 | #define ATTR_ALLOC_CHUNK 4 | |
388 | #endif | |
389 | ||
bd210d54 NC |
390 | /* Variable and function hash tables. This is used to speed up look-up |
391 | in lookup_symbol_in_var_table() and lookup_symbol_in_function_table(). | |
392 | In order to share code between variable and function infos, we use | |
393 | a list of untyped pointer for all variable/function info associated with | |
394 | a symbol. We waste a bit of memory for list with one node but that | |
395 | simplifies the code. */ | |
396 | ||
397 | struct info_list_node | |
398 | { | |
399 | struct info_list_node *next; | |
400 | void *info; | |
401 | }; | |
402 | ||
403 | /* Info hash entry. */ | |
404 | struct info_hash_entry | |
405 | { | |
406 | struct bfd_hash_entry root; | |
407 | struct info_list_node *head; | |
408 | }; | |
409 | ||
410 | struct info_hash_table | |
411 | { | |
412 | struct bfd_hash_table base; | |
413 | }; | |
414 | ||
089e3718 | 415 | /* Function to create a new entry in info hash table. */ |
bd210d54 NC |
416 | |
417 | static struct bfd_hash_entry * | |
418 | info_hash_table_newfunc (struct bfd_hash_entry *entry, | |
419 | struct bfd_hash_table *table, | |
420 | const char *string) | |
421 | { | |
422 | struct info_hash_entry *ret = (struct info_hash_entry *) entry; | |
423 | ||
424 | /* Allocate the structure if it has not already been allocated by a | |
425 | derived class. */ | |
426 | if (ret == NULL) | |
427 | { | |
a50b1753 | 428 | ret = (struct info_hash_entry *) bfd_hash_allocate (table, |
93ee1e36 | 429 | sizeof (* ret)); |
bd210d54 NC |
430 | if (ret == NULL) |
431 | return NULL; | |
432 | } | |
433 | ||
434 | /* Call the allocation method of the base class. */ | |
435 | ret = ((struct info_hash_entry *) | |
2d47a72c | 436 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); |
bd210d54 NC |
437 | |
438 | /* Initialize the local fields here. */ | |
439 | if (ret) | |
440 | ret->head = NULL; | |
441 | ||
442 | return (struct bfd_hash_entry *) ret; | |
443 | } | |
444 | ||
445 | /* Function to create a new info hash table. It returns a pointer to the | |
446 | newly created table or NULL if there is any error. We need abfd | |
447 | solely for memory allocation. */ | |
448 | ||
449 | static struct info_hash_table * | |
450 | create_info_hash_table (bfd *abfd) | |
451 | { | |
452 | struct info_hash_table *hash_table; | |
453 | ||
a2a50954 AM |
454 | hash_table = ((struct info_hash_table *) |
455 | bfd_alloc (abfd, sizeof (struct info_hash_table))); | |
bd210d54 NC |
456 | if (!hash_table) |
457 | return hash_table; | |
458 | ||
459 | if (!bfd_hash_table_init (&hash_table->base, info_hash_table_newfunc, | |
460 | sizeof (struct info_hash_entry))) | |
461 | { | |
462 | bfd_release (abfd, hash_table); | |
463 | return NULL; | |
464 | } | |
465 | ||
466 | return hash_table; | |
467 | } | |
468 | ||
469 | /* Insert an info entry into an info hash table. We do not check of | |
470 | duplicate entries. Also, the caller need to guarantee that the | |
471 | right type of info in inserted as info is passed as a void* pointer. | |
472 | This function returns true if there is no error. */ | |
473 | ||
474 | static bfd_boolean | |
475 | insert_info_hash_table (struct info_hash_table *hash_table, | |
476 | const char *key, | |
477 | void *info, | |
478 | bfd_boolean copy_p) | |
479 | { | |
480 | struct info_hash_entry *entry; | |
481 | struct info_list_node *node; | |
482 | ||
483 | entry = (struct info_hash_entry*) bfd_hash_lookup (&hash_table->base, | |
484 | key, TRUE, copy_p); | |
485 | if (!entry) | |
486 | return FALSE; | |
487 | ||
a50b1753 | 488 | node = (struct info_list_node *) bfd_hash_allocate (&hash_table->base, |
93ee1e36 | 489 | sizeof (*node)); |
bd210d54 NC |
490 | if (!node) |
491 | return FALSE; | |
492 | ||
493 | node->info = info; | |
494 | node->next = entry->head; | |
495 | entry->head = node; | |
496 | ||
497 | return TRUE; | |
498 | } | |
499 | ||
500 | /* Look up an info entry list from an info hash table. Return NULL | |
089e3718 | 501 | if there is none. */ |
bd210d54 NC |
502 | |
503 | static struct info_list_node * | |
504 | lookup_info_hash_table (struct info_hash_table *hash_table, const char *key) | |
505 | { | |
506 | struct info_hash_entry *entry; | |
507 | ||
508 | entry = (struct info_hash_entry*) bfd_hash_lookup (&hash_table->base, key, | |
509 | FALSE, FALSE); | |
510 | return entry ? entry->head : NULL; | |
511 | } | |
512 | ||
1b315056 | 513 | /* Read a section into its appropriate place in the dwarf2_debug |
dc80fd5c | 514 | struct (indicated by SECTION_BUFFER and SECTION_SIZE). If SYMS is |
1b315056 | 515 | not NULL, use bfd_simple_get_relocated_section_contents to read the |
dc80fd5c NC |
516 | section contents, otherwise use bfd_get_section_contents. Fail if |
517 | the located section does not contain at least OFFSET bytes. */ | |
1b315056 CS |
518 | |
519 | static bfd_boolean | |
07d6d2b8 | 520 | read_section (bfd * abfd, |
fc28f9aa | 521 | const struct dwarf_debug_section *sec, |
dc80fd5c NC |
522 | asymbol ** syms, |
523 | bfd_uint64_t offset, | |
524 | bfd_byte ** section_buffer, | |
525 | bfd_size_type * section_size) | |
1b315056 CS |
526 | { |
527 | asection *msec; | |
fc28f9aa | 528 | const char *section_name = sec->uncompressed_name; |
4b04bba2 | 529 | bfd_byte *contents = *section_buffer; |
1b315056 | 530 | |
95e34fb4 | 531 | /* The section may have already been read. */ |
4b04bba2 | 532 | if (contents == NULL) |
1b315056 | 533 | { |
53638231 | 534 | msec = bfd_get_section_by_name (abfd, section_name); |
4a114e3e | 535 | if (! msec) |
53638231 | 536 | { |
fc28f9aa | 537 | section_name = sec->compressed_name; |
93ee1e36 AM |
538 | if (section_name != NULL) |
539 | msec = bfd_get_section_by_name (abfd, section_name); | |
53638231 AS |
540 | } |
541 | if (! msec) | |
2d47a72c | 542 | { |
9793eb77 | 543 | _bfd_error_handler (_("DWARF error: can't find %s section."), |
4eca0228 | 544 | sec->uncompressed_name); |
2d47a72c DJ |
545 | bfd_set_error (bfd_error_bad_value); |
546 | return FALSE; | |
547 | } | |
53638231 | 548 | |
bc664799 | 549 | *section_size = msec->rawsize ? msec->rawsize : msec->size; |
4b04bba2 AM |
550 | /* Paranoia - alloc one extra so that we can make sure a string |
551 | section is NUL terminated. */ | |
552 | contents = (bfd_byte *) bfd_malloc (*section_size + 1); | |
553 | if (contents == NULL) | |
554 | return FALSE; | |
555 | if (syms | |
556 | ? !bfd_simple_get_relocated_section_contents (abfd, msec, contents, | |
557 | syms) | |
558 | : !bfd_get_section_contents (abfd, msec, contents, 0, *section_size)) | |
8c2ccebd | 559 | { |
4b04bba2 AM |
560 | free (contents); |
561 | return FALSE; | |
e4f27230 | 562 | } |
4b04bba2 AM |
563 | contents[*section_size] = 0; |
564 | *section_buffer = contents; | |
1b315056 CS |
565 | } |
566 | ||
567 | /* It is possible to get a bad value for the offset into the section | |
dc80fd5c | 568 | that the client wants. Validate it here to avoid trouble later. */ |
1b315056 CS |
569 | if (offset != 0 && offset >= *section_size) |
570 | { | |
695344c0 | 571 | /* xgettext: c-format */ |
9793eb77 AM |
572 | _bfd_error_handler (_("DWARF error: offset (%" PRIu64 ")" |
573 | " greater than or equal to %s size (%" PRIu64 ")"), | |
8979927a | 574 | (uint64_t) offset, section_name, |
2dcf00ce | 575 | (uint64_t) *section_size); |
1b315056 CS |
576 | bfd_set_error (bfd_error_bad_value); |
577 | return FALSE; | |
578 | } | |
579 | ||
580 | return TRUE; | |
581 | } | |
582 | ||
a092b084 | 583 | /* Read dwarf information from a buffer. */ |
252b5132 RH |
584 | |
585 | static unsigned int | |
dbb3fbbb | 586 | read_1_byte (bfd *abfd ATTRIBUTE_UNUSED, bfd_byte *buf, bfd_byte *end) |
252b5132 | 587 | { |
dbb3fbbb NC |
588 | if (buf + 1 > end) |
589 | return 0; | |
818a27ac | 590 | return bfd_get_8 (abfd, buf); |
252b5132 RH |
591 | } |
592 | ||
593 | static int | |
dbb3fbbb | 594 | read_1_signed_byte (bfd *abfd ATTRIBUTE_UNUSED, bfd_byte *buf, bfd_byte *end) |
252b5132 | 595 | { |
dbb3fbbb NC |
596 | if (buf + 1 > end) |
597 | return 0; | |
818a27ac | 598 | return bfd_get_signed_8 (abfd, buf); |
252b5132 RH |
599 | } |
600 | ||
601 | static unsigned int | |
dbb3fbbb | 602 | read_2_bytes (bfd *abfd, bfd_byte *buf, bfd_byte *end) |
252b5132 | 603 | { |
dbb3fbbb NC |
604 | if (buf + 2 > end) |
605 | return 0; | |
818a27ac | 606 | return bfd_get_16 (abfd, buf); |
252b5132 RH |
607 | } |
608 | ||
252b5132 | 609 | static unsigned int |
dbb3fbbb | 610 | read_4_bytes (bfd *abfd, bfd_byte *buf, bfd_byte *end) |
252b5132 | 611 | { |
dbb3fbbb NC |
612 | if (buf + 4 > end) |
613 | return 0; | |
818a27ac | 614 | return bfd_get_32 (abfd, buf); |
252b5132 RH |
615 | } |
616 | ||
8ce8c090 | 617 | static bfd_uint64_t |
dbb3fbbb | 618 | read_8_bytes (bfd *abfd, bfd_byte *buf, bfd_byte *end) |
252b5132 | 619 | { |
dbb3fbbb NC |
620 | if (buf + 8 > end) |
621 | return 0; | |
818a27ac | 622 | return bfd_get_64 (abfd, buf); |
252b5132 RH |
623 | } |
624 | ||
f075ee0c | 625 | static bfd_byte * |
12c96342 NC |
626 | read_n_bytes (bfd_byte * buf, |
627 | bfd_byte * end, | |
628 | struct dwarf_block * block) | |
252b5132 | 629 | { |
12c96342 NC |
630 | unsigned int size = block->size; |
631 | bfd_byte * block_end = buf + size; | |
632 | ||
633 | if (block_end > end || block_end < buf) | |
634 | { | |
635 | block->data = NULL; | |
636 | block->size = 0; | |
637 | return end; | |
638 | } | |
639 | else | |
640 | { | |
641 | block->data = buf; | |
642 | return block_end; | |
643 | } | |
252b5132 RH |
644 | } |
645 | ||
dbb3fbbb NC |
646 | /* Scans a NUL terminated string starting at BUF, returning a pointer to it. |
647 | Returns the number of characters in the string, *including* the NUL byte, | |
648 | in BYTES_READ_PTR. This value is set even if the function fails. Bytes | |
649 | at or beyond BUF_END will not be read. Returns NULL if there was a | |
650 | problem, or if the string is empty. */ | |
651 | ||
252b5132 | 652 | static char * |
07d6d2b8 AM |
653 | read_string (bfd * abfd ATTRIBUTE_UNUSED, |
654 | bfd_byte * buf, | |
655 | bfd_byte * buf_end, | |
dbb3fbbb | 656 | unsigned int * bytes_read_ptr) |
252b5132 | 657 | { |
dbb3fbbb NC |
658 | bfd_byte *str = buf; |
659 | ||
660 | if (buf >= buf_end) | |
661 | { | |
662 | * bytes_read_ptr = 0; | |
663 | return NULL; | |
664 | } | |
dc80fd5c | 665 | |
f075ee0c | 666 | if (*str == '\0') |
252b5132 | 667 | { |
dbb3fbbb | 668 | * bytes_read_ptr = 1; |
252b5132 RH |
669 | return NULL; |
670 | } | |
98591c73 | 671 | |
dbb3fbbb NC |
672 | while (buf < buf_end) |
673 | if (* buf ++ == 0) | |
674 | { | |
675 | * bytes_read_ptr = buf - str; | |
676 | return (char *) str; | |
677 | } | |
678 | ||
679 | * bytes_read_ptr = buf - str; | |
680 | return NULL; | |
252b5132 RH |
681 | } |
682 | ||
dbb3fbbb NC |
683 | /* Reads an offset from BUF and then locates the string at this offset |
684 | inside the debug string section. Returns a pointer to the string. | |
685 | Returns the number of bytes read from BUF, *not* the length of the string, | |
686 | in BYTES_READ_PTR. This value is set even if the function fails. Bytes | |
687 | at or beyond BUF_END will not be read from BUF. Returns NULL if there was | |
688 | a problem, or if the string is empty. Does not check for NUL termination | |
689 | of the string. */ | |
dc80fd5c | 690 | |
d03ba2a1 | 691 | static char * |
dc80fd5c | 692 | read_indirect_string (struct comp_unit * unit, |
07d6d2b8 AM |
693 | bfd_byte * buf, |
694 | bfd_byte * buf_end, | |
695 | unsigned int * bytes_read_ptr) | |
d03ba2a1 | 696 | { |
8ce8c090 | 697 | bfd_uint64_t offset; |
d03ba2a1 | 698 | struct dwarf2_debug *stash = unit->stash; |
f075ee0c | 699 | char *str; |
d03ba2a1 | 700 | |
dbb3fbbb NC |
701 | if (buf + unit->offset_size > buf_end) |
702 | { | |
703 | * bytes_read_ptr = 0; | |
704 | return NULL; | |
705 | } | |
62f8d217 | 706 | |
d03ba2a1 | 707 | if (unit->offset_size == 4) |
dbb3fbbb | 708 | offset = read_4_bytes (unit->abfd, buf, buf_end); |
d03ba2a1 | 709 | else |
dbb3fbbb | 710 | offset = read_8_bytes (unit->abfd, buf, buf_end); |
dc80fd5c | 711 | |
d03ba2a1 JJ |
712 | *bytes_read_ptr = unit->offset_size; |
713 | ||
fc28f9aa | 714 | if (! read_section (unit->abfd, &stash->debug_sections[debug_str], |
93ee1e36 | 715 | stash->syms, offset, |
9e32b19f | 716 | &stash->dwarf_str_buffer, &stash->dwarf_str_size)) |
dc80fd5c | 717 | return NULL; |
d03ba2a1 | 718 | |
dbb3fbbb NC |
719 | if (offset >= stash->dwarf_str_size) |
720 | return NULL; | |
f075ee0c AM |
721 | str = (char *) stash->dwarf_str_buffer + offset; |
722 | if (*str == '\0') | |
d03ba2a1 | 723 | return NULL; |
f075ee0c | 724 | return str; |
d03ba2a1 JJ |
725 | } |
726 | ||
0041f7df JK |
727 | /* Like read_indirect_string but from .debug_line_str section. */ |
728 | ||
729 | static char * | |
730 | read_indirect_line_string (struct comp_unit * unit, | |
07d6d2b8 AM |
731 | bfd_byte * buf, |
732 | bfd_byte * buf_end, | |
0041f7df JK |
733 | unsigned int * bytes_read_ptr) |
734 | { | |
735 | bfd_uint64_t offset; | |
736 | struct dwarf2_debug *stash = unit->stash; | |
737 | char *str; | |
738 | ||
739 | if (buf + unit->offset_size > buf_end) | |
740 | { | |
741 | * bytes_read_ptr = 0; | |
742 | return NULL; | |
743 | } | |
744 | ||
745 | if (unit->offset_size == 4) | |
746 | offset = read_4_bytes (unit->abfd, buf, buf_end); | |
747 | else | |
748 | offset = read_8_bytes (unit->abfd, buf, buf_end); | |
749 | ||
750 | *bytes_read_ptr = unit->offset_size; | |
751 | ||
752 | if (! read_section (unit->abfd, &stash->debug_sections[debug_line_str], | |
753 | stash->syms, offset, | |
754 | &stash->dwarf_line_str_buffer, | |
755 | &stash->dwarf_line_str_size)) | |
756 | return NULL; | |
757 | ||
758 | if (offset >= stash->dwarf_line_str_size) | |
759 | return NULL; | |
760 | str = (char *) stash->dwarf_line_str_buffer + offset; | |
761 | if (*str == '\0') | |
762 | return NULL; | |
763 | return str; | |
764 | } | |
765 | ||
95e34fb4 | 766 | /* Like read_indirect_string but uses a .debug_str located in |
93ee1e36 | 767 | an alternate file pointed to by the .gnu_debugaltlink section. |
95e34fb4 NC |
768 | Used to impement DW_FORM_GNU_strp_alt. */ |
769 | ||
770 | static char * | |
771 | read_alt_indirect_string (struct comp_unit * unit, | |
07d6d2b8 AM |
772 | bfd_byte * buf, |
773 | bfd_byte * buf_end, | |
95e34fb4 NC |
774 | unsigned int * bytes_read_ptr) |
775 | { | |
776 | bfd_uint64_t offset; | |
777 | struct dwarf2_debug *stash = unit->stash; | |
778 | char *str; | |
779 | ||
dbb3fbbb NC |
780 | if (buf + unit->offset_size > buf_end) |
781 | { | |
782 | * bytes_read_ptr = 0; | |
783 | return NULL; | |
784 | } | |
62f8d217 | 785 | |
95e34fb4 | 786 | if (unit->offset_size == 4) |
dbb3fbbb | 787 | offset = read_4_bytes (unit->abfd, buf, buf_end); |
95e34fb4 | 788 | else |
dbb3fbbb | 789 | offset = read_8_bytes (unit->abfd, buf, buf_end); |
95e34fb4 NC |
790 | |
791 | *bytes_read_ptr = unit->offset_size; | |
792 | ||
793 | if (stash->alt_bfd_ptr == NULL) | |
794 | { | |
795 | bfd * debug_bfd; | |
796 | char * debug_filename = bfd_follow_gnu_debugaltlink (unit->abfd, DEBUGDIR); | |
797 | ||
798 | if (debug_filename == NULL) | |
799 | return NULL; | |
800 | ||
801 | if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL | |
802 | || ! bfd_check_format (debug_bfd, bfd_object)) | |
803 | { | |
804 | if (debug_bfd) | |
805 | bfd_close (debug_bfd); | |
806 | ||
807 | /* FIXME: Should we report our failure to follow the debuglink ? */ | |
808 | free (debug_filename); | |
809 | return NULL; | |
810 | } | |
811 | stash->alt_bfd_ptr = debug_bfd; | |
812 | } | |
62f8d217 | 813 | |
95e34fb4 NC |
814 | if (! read_section (unit->stash->alt_bfd_ptr, |
815 | stash->debug_sections + debug_str_alt, | |
816 | NULL, /* FIXME: Do we need to load alternate symbols ? */ | |
817 | offset, | |
818 | &stash->alt_dwarf_str_buffer, | |
819 | &stash->alt_dwarf_str_size)) | |
820 | return NULL; | |
821 | ||
dbb3fbbb NC |
822 | if (offset >= stash->alt_dwarf_str_size) |
823 | return NULL; | |
95e34fb4 NC |
824 | str = (char *) stash->alt_dwarf_str_buffer + offset; |
825 | if (*str == '\0') | |
826 | return NULL; | |
827 | ||
828 | return str; | |
829 | } | |
830 | ||
831 | /* Resolve an alternate reference from UNIT at OFFSET. | |
832 | Returns a pointer into the loaded alternate CU upon success | |
833 | or NULL upon failure. */ | |
834 | ||
835 | static bfd_byte * | |
836 | read_alt_indirect_ref (struct comp_unit * unit, | |
837 | bfd_uint64_t offset) | |
838 | { | |
839 | struct dwarf2_debug *stash = unit->stash; | |
840 | ||
841 | if (stash->alt_bfd_ptr == NULL) | |
842 | { | |
843 | bfd * debug_bfd; | |
844 | char * debug_filename = bfd_follow_gnu_debugaltlink (unit->abfd, DEBUGDIR); | |
845 | ||
846 | if (debug_filename == NULL) | |
847 | return FALSE; | |
848 | ||
849 | if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL | |
850 | || ! bfd_check_format (debug_bfd, bfd_object)) | |
851 | { | |
852 | if (debug_bfd) | |
853 | bfd_close (debug_bfd); | |
854 | ||
855 | /* FIXME: Should we report our failure to follow the debuglink ? */ | |
856 | free (debug_filename); | |
857 | return NULL; | |
858 | } | |
859 | stash->alt_bfd_ptr = debug_bfd; | |
860 | } | |
62f8d217 | 861 | |
95e34fb4 NC |
862 | if (! read_section (unit->stash->alt_bfd_ptr, |
863 | stash->debug_sections + debug_info_alt, | |
864 | NULL, /* FIXME: Do we need to load alternate symbols ? */ | |
865 | offset, | |
866 | &stash->alt_dwarf_info_buffer, | |
867 | &stash->alt_dwarf_info_size)) | |
868 | return NULL; | |
869 | ||
dbb3fbbb NC |
870 | if (offset >= stash->alt_dwarf_info_size) |
871 | return NULL; | |
95e34fb4 NC |
872 | return stash->alt_dwarf_info_buffer + offset; |
873 | } | |
874 | ||
8ce8c090 | 875 | static bfd_uint64_t |
dbb3fbbb | 876 | read_address (struct comp_unit *unit, bfd_byte *buf, bfd_byte * buf_end) |
252b5132 | 877 | { |
fa15f18d AM |
878 | int signed_vma = 0; |
879 | ||
880 | if (bfd_get_flavour (unit->abfd) == bfd_target_elf_flavour) | |
881 | signed_vma = get_elf_backend_data (unit->abfd)->sign_extend_vma; | |
0af4cd7c | 882 | |
dbb3fbbb NC |
883 | if (buf + unit->addr_size > buf_end) |
884 | return 0; | |
885 | ||
0af4cd7c PK |
886 | if (signed_vma) |
887 | { | |
888 | switch (unit->addr_size) | |
889 | { | |
890 | case 8: | |
891 | return bfd_get_signed_64 (unit->abfd, buf); | |
892 | case 4: | |
893 | return bfd_get_signed_32 (unit->abfd, buf); | |
894 | case 2: | |
895 | return bfd_get_signed_16 (unit->abfd, buf); | |
896 | default: | |
897 | abort (); | |
898 | } | |
899 | } | |
900 | else | |
252b5132 | 901 | { |
0af4cd7c PK |
902 | switch (unit->addr_size) |
903 | { | |
904 | case 8: | |
905 | return bfd_get_64 (unit->abfd, buf); | |
906 | case 4: | |
907 | return bfd_get_32 (unit->abfd, buf); | |
908 | case 2: | |
909 | return bfd_get_16 (unit->abfd, buf); | |
910 | default: | |
911 | abort (); | |
912 | } | |
252b5132 | 913 | } |
252b5132 RH |
914 | } |
915 | ||
252b5132 RH |
916 | /* Lookup an abbrev_info structure in the abbrev hash table. */ |
917 | ||
918 | static struct abbrev_info * | |
818a27ac | 919 | lookup_abbrev (unsigned int number, struct abbrev_info **abbrevs) |
252b5132 RH |
920 | { |
921 | unsigned int hash_number; | |
922 | struct abbrev_info *abbrev; | |
923 | ||
924 | hash_number = number % ABBREV_HASH_SIZE; | |
925 | abbrev = abbrevs[hash_number]; | |
926 | ||
927 | while (abbrev) | |
928 | { | |
929 | if (abbrev->number == number) | |
930 | return abbrev; | |
931 | else | |
932 | abbrev = abbrev->next; | |
933 | } | |
98591c73 | 934 | |
252b5132 RH |
935 | return NULL; |
936 | } | |
937 | ||
938 | /* In DWARF version 2, the description of the debugging information is | |
939 | stored in a separate .debug_abbrev section. Before we read any | |
940 | dies from a section we read in all abbreviations and install them | |
941 | in a hash table. */ | |
942 | ||
943 | static struct abbrev_info** | |
8ce8c090 | 944 | read_abbrevs (bfd *abfd, bfd_uint64_t offset, struct dwarf2_debug *stash) |
252b5132 RH |
945 | { |
946 | struct abbrev_info **abbrevs; | |
f075ee0c | 947 | bfd_byte *abbrev_ptr; |
dbb3fbbb | 948 | bfd_byte *abbrev_end; |
252b5132 RH |
949 | struct abbrev_info *cur_abbrev; |
950 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
951 | unsigned int abbrev_form, hash_number; | |
dc810e39 | 952 | bfd_size_type amt; |
252b5132 | 953 | |
fc28f9aa | 954 | if (! read_section (abfd, &stash->debug_sections[debug_abbrev], |
93ee1e36 | 955 | stash->syms, offset, |
9e32b19f | 956 | &stash->dwarf_abbrev_buffer, &stash->dwarf_abbrev_size)) |
8af6b354 | 957 | return NULL; |
252b5132 | 958 | |
dbb3fbbb NC |
959 | if (offset >= stash->dwarf_abbrev_size) |
960 | return NULL; | |
961 | ||
dc810e39 | 962 | amt = sizeof (struct abbrev_info*) * ABBREV_HASH_SIZE; |
a50b1753 | 963 | abbrevs = (struct abbrev_info **) bfd_zalloc (abfd, amt); |
8af6b354 AM |
964 | if (abbrevs == NULL) |
965 | return NULL; | |
252b5132 RH |
966 | |
967 | abbrev_ptr = stash->dwarf_abbrev_buffer + offset; | |
dbb3fbbb | 968 | abbrev_end = stash->dwarf_abbrev_buffer + stash->dwarf_abbrev_size; |
c7c3d11b PA |
969 | abbrev_number = _bfd_safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, |
970 | FALSE, abbrev_end); | |
252b5132 RH |
971 | abbrev_ptr += bytes_read; |
972 | ||
a092b084 | 973 | /* Loop until we reach an abbrev number of 0. */ |
252b5132 RH |
974 | while (abbrev_number) |
975 | { | |
dc810e39 | 976 | amt = sizeof (struct abbrev_info); |
a50b1753 | 977 | cur_abbrev = (struct abbrev_info *) bfd_zalloc (abfd, amt); |
8af6b354 AM |
978 | if (cur_abbrev == NULL) |
979 | return NULL; | |
252b5132 | 980 | |
a092b084 | 981 | /* Read in abbrev header. */ |
252b5132 | 982 | cur_abbrev->number = abbrev_number; |
d45913a0 | 983 | cur_abbrev->tag = (enum dwarf_tag) |
4265548c PA |
984 | _bfd_safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, |
985 | FALSE, abbrev_end); | |
252b5132 | 986 | abbrev_ptr += bytes_read; |
dbb3fbbb | 987 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr, abbrev_end); |
252b5132 RH |
988 | abbrev_ptr += 1; |
989 | ||
a092b084 | 990 | /* Now read in declarations. */ |
0041f7df | 991 | for (;;) |
252b5132 | 992 | { |
0041f7df JK |
993 | /* Initialize it just to avoid a GCC false warning. */ |
994 | bfd_vma implicit_const = -1; | |
995 | ||
996 | abbrev_name = _bfd_safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, | |
997 | FALSE, abbrev_end); | |
998 | abbrev_ptr += bytes_read; | |
999 | abbrev_form = _bfd_safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, | |
1000 | FALSE, abbrev_end); | |
1001 | abbrev_ptr += bytes_read; | |
1002 | if (abbrev_form == DW_FORM_implicit_const) | |
1003 | { | |
1004 | implicit_const = _bfd_safe_read_leb128 (abfd, abbrev_ptr, | |
1005 | &bytes_read, TRUE, | |
1006 | abbrev_end); | |
1007 | abbrev_ptr += bytes_read; | |
1008 | } | |
1009 | ||
1010 | if (abbrev_name == 0) | |
1011 | break; | |
1012 | ||
252b5132 RH |
1013 | if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0) |
1014 | { | |
35330cce NC |
1015 | struct attr_abbrev *tmp; |
1016 | ||
dc810e39 AM |
1017 | amt = cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK; |
1018 | amt *= sizeof (struct attr_abbrev); | |
a50b1753 | 1019 | tmp = (struct attr_abbrev *) bfd_realloc (cur_abbrev->attrs, amt); |
35330cce | 1020 | if (tmp == NULL) |
d8d1c398 AM |
1021 | { |
1022 | size_t i; | |
1023 | ||
1024 | for (i = 0; i < ABBREV_HASH_SIZE; i++) | |
1025 | { | |
1026 | struct abbrev_info *abbrev = abbrevs[i]; | |
1027 | ||
1028 | while (abbrev) | |
1029 | { | |
34b5e0b2 NC |
1030 | free (abbrev->attrs); |
1031 | abbrev = abbrev->next; | |
d8d1c398 AM |
1032 | } |
1033 | } | |
1034 | return NULL; | |
1035 | } | |
35330cce | 1036 | cur_abbrev->attrs = tmp; |
252b5132 | 1037 | } |
98591c73 | 1038 | |
d45913a0 DA |
1039 | cur_abbrev->attrs[cur_abbrev->num_attrs].name |
1040 | = (enum dwarf_attribute) abbrev_name; | |
0041f7df | 1041 | cur_abbrev->attrs[cur_abbrev->num_attrs].form |
d45913a0 | 1042 | = (enum dwarf_form) abbrev_form; |
0041f7df JK |
1043 | cur_abbrev->attrs[cur_abbrev->num_attrs].implicit_const |
1044 | = implicit_const; | |
1045 | ++cur_abbrev->num_attrs; | |
252b5132 RH |
1046 | } |
1047 | ||
1048 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
1049 | cur_abbrev->next = abbrevs[hash_number]; | |
1050 | abbrevs[hash_number] = cur_abbrev; | |
1051 | ||
1052 | /* Get next abbreviation. | |
e82ce529 | 1053 | Under Irix6 the abbreviations for a compilation unit are not |
252b5132 RH |
1054 | always properly terminated with an abbrev number of 0. |
1055 | Exit loop if we encounter an abbreviation which we have | |
1056 | already read (which means we are about to read the abbreviations | |
1057 | for the next compile unit) or if the end of the abbreviation | |
1058 | table is reached. */ | |
1059 | if ((unsigned int) (abbrev_ptr - stash->dwarf_abbrev_buffer) | |
d8d1c398 | 1060 | >= stash->dwarf_abbrev_size) |
252b5132 | 1061 | break; |
4265548c PA |
1062 | abbrev_number = _bfd_safe_read_leb128 (abfd, abbrev_ptr, |
1063 | &bytes_read, FALSE, abbrev_end); | |
252b5132 | 1064 | abbrev_ptr += bytes_read; |
dbb3fbbb | 1065 | if (lookup_abbrev (abbrev_number, abbrevs) != NULL) |
252b5132 RH |
1066 | break; |
1067 | } | |
1068 | ||
1069 | return abbrevs; | |
1070 | } | |
1071 | ||
60d77146 NC |
1072 | /* Returns true if the form is one which has a string value. */ |
1073 | ||
1074 | static inline bfd_boolean | |
1075 | is_str_attr (enum dwarf_form form) | |
1076 | { | |
0041f7df JK |
1077 | return (form == DW_FORM_string || form == DW_FORM_strp |
1078 | || form == DW_FORM_line_strp || form == DW_FORM_GNU_strp_alt); | |
60d77146 NC |
1079 | } |
1080 | ||
dbb3fbbb NC |
1081 | /* Read and fill in the value of attribute ATTR as described by FORM. |
1082 | Read data starting from INFO_PTR, but never at or beyond INFO_PTR_END. | |
1083 | Returns an updated INFO_PTR taking into account the amount of data read. */ | |
252b5132 | 1084 | |
f075ee0c | 1085 | static bfd_byte * |
dbb3fbbb | 1086 | read_attribute_value (struct attribute * attr, |
07d6d2b8 AM |
1087 | unsigned form, |
1088 | bfd_vma implicit_const, | |
dbb3fbbb | 1089 | struct comp_unit * unit, |
07d6d2b8 AM |
1090 | bfd_byte * info_ptr, |
1091 | bfd_byte * info_ptr_end) | |
252b5132 RH |
1092 | { |
1093 | bfd *abfd = unit->abfd; | |
1094 | unsigned int bytes_read; | |
1095 | struct dwarf_block *blk; | |
dc810e39 | 1096 | bfd_size_type amt; |
252b5132 | 1097 | |
a97fbc7e | 1098 | if (info_ptr >= info_ptr_end && form != DW_FORM_flag_present) |
dbb3fbbb | 1099 | { |
9793eb77 | 1100 | _bfd_error_handler (_("DWARF error: info pointer extends beyond end of attributes")); |
dbb3fbbb NC |
1101 | bfd_set_error (bfd_error_bad_value); |
1102 | return info_ptr; | |
1103 | } | |
1104 | ||
d45913a0 | 1105 | attr->form = (enum dwarf_form) form; |
98591c73 | 1106 | |
cf716c56 | 1107 | switch (form) |
252b5132 | 1108 | { |
252b5132 | 1109 | case DW_FORM_ref_addr: |
5609a71e DJ |
1110 | /* DW_FORM_ref_addr is an address in DWARF2, and an offset in |
1111 | DWARF3. */ | |
c07cbdd7 | 1112 | if (unit->version == 3 || unit->version == 4) |
5609a71e DJ |
1113 | { |
1114 | if (unit->offset_size == 4) | |
dbb3fbbb | 1115 | attr->u.val = read_4_bytes (unit->abfd, info_ptr, info_ptr_end); |
5609a71e | 1116 | else |
dbb3fbbb | 1117 | attr->u.val = read_8_bytes (unit->abfd, info_ptr, info_ptr_end); |
5609a71e DJ |
1118 | info_ptr += unit->offset_size; |
1119 | break; | |
1120 | } | |
1121 | /* FALLTHROUGH */ | |
1122 | case DW_FORM_addr: | |
dbb3fbbb | 1123 | attr->u.val = read_address (unit, info_ptr, info_ptr_end); |
252b5132 RH |
1124 | info_ptr += unit->addr_size; |
1125 | break; | |
95e34fb4 | 1126 | case DW_FORM_GNU_ref_alt: |
c07cbdd7 JJ |
1127 | case DW_FORM_sec_offset: |
1128 | if (unit->offset_size == 4) | |
dbb3fbbb | 1129 | attr->u.val = read_4_bytes (unit->abfd, info_ptr, info_ptr_end); |
c07cbdd7 | 1130 | else |
dbb3fbbb | 1131 | attr->u.val = read_8_bytes (unit->abfd, info_ptr, info_ptr_end); |
c07cbdd7 JJ |
1132 | info_ptr += unit->offset_size; |
1133 | break; | |
252b5132 | 1134 | case DW_FORM_block2: |
dc810e39 | 1135 | amt = sizeof (struct dwarf_block); |
a50b1753 | 1136 | blk = (struct dwarf_block *) bfd_alloc (abfd, amt); |
8af6b354 AM |
1137 | if (blk == NULL) |
1138 | return NULL; | |
dbb3fbbb | 1139 | blk->size = read_2_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 | 1140 | info_ptr += 2; |
12c96342 | 1141 | info_ptr = read_n_bytes (info_ptr, info_ptr_end, blk); |
482e2e37 | 1142 | attr->u.blk = blk; |
252b5132 RH |
1143 | break; |
1144 | case DW_FORM_block4: | |
dc810e39 | 1145 | amt = sizeof (struct dwarf_block); |
a50b1753 | 1146 | blk = (struct dwarf_block *) bfd_alloc (abfd, amt); |
8af6b354 AM |
1147 | if (blk == NULL) |
1148 | return NULL; | |
dbb3fbbb | 1149 | blk->size = read_4_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 | 1150 | info_ptr += 4; |
12c96342 | 1151 | info_ptr = read_n_bytes (info_ptr, info_ptr_end, blk); |
482e2e37 | 1152 | attr->u.blk = blk; |
252b5132 RH |
1153 | break; |
1154 | case DW_FORM_data2: | |
dbb3fbbb | 1155 | attr->u.val = read_2_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1156 | info_ptr += 2; |
1157 | break; | |
1158 | case DW_FORM_data4: | |
dbb3fbbb | 1159 | attr->u.val = read_4_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1160 | info_ptr += 4; |
1161 | break; | |
1162 | case DW_FORM_data8: | |
dbb3fbbb | 1163 | attr->u.val = read_8_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1164 | info_ptr += 8; |
1165 | break; | |
1166 | case DW_FORM_string: | |
dbb3fbbb | 1167 | attr->u.str = read_string (abfd, info_ptr, info_ptr_end, &bytes_read); |
252b5132 RH |
1168 | info_ptr += bytes_read; |
1169 | break; | |
d03ba2a1 | 1170 | case DW_FORM_strp: |
dbb3fbbb | 1171 | attr->u.str = read_indirect_string (unit, info_ptr, info_ptr_end, &bytes_read); |
d03ba2a1 JJ |
1172 | info_ptr += bytes_read; |
1173 | break; | |
0041f7df JK |
1174 | case DW_FORM_line_strp: |
1175 | attr->u.str = read_indirect_line_string (unit, info_ptr, info_ptr_end, &bytes_read); | |
1176 | info_ptr += bytes_read; | |
1177 | break; | |
95e34fb4 | 1178 | case DW_FORM_GNU_strp_alt: |
dbb3fbbb | 1179 | attr->u.str = read_alt_indirect_string (unit, info_ptr, info_ptr_end, &bytes_read); |
95e34fb4 NC |
1180 | info_ptr += bytes_read; |
1181 | break; | |
c07cbdd7 | 1182 | case DW_FORM_exprloc: |
252b5132 | 1183 | case DW_FORM_block: |
dc810e39 | 1184 | amt = sizeof (struct dwarf_block); |
a50b1753 | 1185 | blk = (struct dwarf_block *) bfd_alloc (abfd, amt); |
8af6b354 AM |
1186 | if (blk == NULL) |
1187 | return NULL; | |
4265548c PA |
1188 | blk->size = _bfd_safe_read_leb128 (abfd, info_ptr, &bytes_read, |
1189 | FALSE, info_ptr_end); | |
252b5132 | 1190 | info_ptr += bytes_read; |
12c96342 | 1191 | info_ptr = read_n_bytes (info_ptr, info_ptr_end, blk); |
482e2e37 | 1192 | attr->u.blk = blk; |
252b5132 RH |
1193 | break; |
1194 | case DW_FORM_block1: | |
dc810e39 | 1195 | amt = sizeof (struct dwarf_block); |
a50b1753 | 1196 | blk = (struct dwarf_block *) bfd_alloc (abfd, amt); |
8af6b354 AM |
1197 | if (blk == NULL) |
1198 | return NULL; | |
dbb3fbbb | 1199 | blk->size = read_1_byte (abfd, info_ptr, info_ptr_end); |
252b5132 | 1200 | info_ptr += 1; |
12c96342 | 1201 | info_ptr = read_n_bytes (info_ptr, info_ptr_end, blk); |
482e2e37 | 1202 | attr->u.blk = blk; |
252b5132 RH |
1203 | break; |
1204 | case DW_FORM_data1: | |
dbb3fbbb | 1205 | attr->u.val = read_1_byte (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1206 | info_ptr += 1; |
1207 | break; | |
1208 | case DW_FORM_flag: | |
dbb3fbbb | 1209 | attr->u.val = read_1_byte (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1210 | info_ptr += 1; |
1211 | break; | |
c07cbdd7 JJ |
1212 | case DW_FORM_flag_present: |
1213 | attr->u.val = 1; | |
1214 | break; | |
252b5132 | 1215 | case DW_FORM_sdata: |
4265548c PA |
1216 | attr->u.sval = _bfd_safe_read_leb128 (abfd, info_ptr, &bytes_read, |
1217 | TRUE, info_ptr_end); | |
252b5132 RH |
1218 | info_ptr += bytes_read; |
1219 | break; | |
1220 | case DW_FORM_udata: | |
4265548c PA |
1221 | attr->u.val = _bfd_safe_read_leb128 (abfd, info_ptr, &bytes_read, |
1222 | FALSE, info_ptr_end); | |
252b5132 RH |
1223 | info_ptr += bytes_read; |
1224 | break; | |
1225 | case DW_FORM_ref1: | |
dbb3fbbb | 1226 | attr->u.val = read_1_byte (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1227 | info_ptr += 1; |
1228 | break; | |
1229 | case DW_FORM_ref2: | |
dbb3fbbb | 1230 | attr->u.val = read_2_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1231 | info_ptr += 2; |
1232 | break; | |
1233 | case DW_FORM_ref4: | |
dbb3fbbb | 1234 | attr->u.val = read_4_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1235 | info_ptr += 4; |
1236 | break; | |
81edd86d | 1237 | case DW_FORM_ref8: |
dbb3fbbb | 1238 | attr->u.val = read_8_bytes (abfd, info_ptr, info_ptr_end); |
81edd86d MM |
1239 | info_ptr += 8; |
1240 | break; | |
a37a68dd | 1241 | case DW_FORM_ref_sig8: |
dbb3fbbb | 1242 | attr->u.val = read_8_bytes (abfd, info_ptr, info_ptr_end); |
a37a68dd CC |
1243 | info_ptr += 8; |
1244 | break; | |
252b5132 | 1245 | case DW_FORM_ref_udata: |
4265548c PA |
1246 | attr->u.val = _bfd_safe_read_leb128 (abfd, info_ptr, &bytes_read, |
1247 | FALSE, info_ptr_end); | |
252b5132 RH |
1248 | info_ptr += bytes_read; |
1249 | break; | |
252b5132 | 1250 | case DW_FORM_indirect: |
4265548c PA |
1251 | form = _bfd_safe_read_leb128 (abfd, info_ptr, &bytes_read, |
1252 | FALSE, info_ptr_end); | |
cf716c56 | 1253 | info_ptr += bytes_read; |
0041f7df JK |
1254 | if (form == DW_FORM_implicit_const) |
1255 | { | |
1256 | implicit_const = _bfd_safe_read_leb128 (abfd, info_ptr, &bytes_read, | |
1257 | TRUE, info_ptr_end); | |
1258 | info_ptr += bytes_read; | |
1259 | } | |
1260 | info_ptr = read_attribute_value (attr, form, implicit_const, unit, | |
1261 | info_ptr, info_ptr_end); | |
1262 | break; | |
1263 | case DW_FORM_implicit_const: | |
1264 | attr->form = DW_FORM_sdata; | |
1265 | attr->u.sval = implicit_const; | |
cf716c56 | 1266 | break; |
252b5132 | 1267 | default: |
9793eb77 | 1268 | _bfd_error_handler (_("DWARF error: invalid or unhandled FORM value: %#x"), |
4eca0228 | 1269 | form); |
252b5132 | 1270 | bfd_set_error (bfd_error_bad_value); |
c07cbdd7 | 1271 | return NULL; |
252b5132 RH |
1272 | } |
1273 | return info_ptr; | |
1274 | } | |
1275 | ||
cf716c56 RH |
1276 | /* Read an attribute described by an abbreviated attribute. */ |
1277 | ||
f075ee0c | 1278 | static bfd_byte * |
dbb3fbbb NC |
1279 | read_attribute (struct attribute * attr, |
1280 | struct attr_abbrev * abbrev, | |
1281 | struct comp_unit * unit, | |
07d6d2b8 AM |
1282 | bfd_byte * info_ptr, |
1283 | bfd_byte * info_ptr_end) | |
cf716c56 RH |
1284 | { |
1285 | attr->name = abbrev->name; | |
0041f7df JK |
1286 | info_ptr = read_attribute_value (attr, abbrev->form, abbrev->implicit_const, |
1287 | unit, info_ptr, info_ptr_end); | |
cf716c56 RH |
1288 | return info_ptr; |
1289 | } | |
1290 | ||
e00e8198 AM |
1291 | /* Return whether DW_AT_name will return the same as DW_AT_linkage_name |
1292 | for a function. */ | |
1293 | ||
1294 | static bfd_boolean | |
1295 | non_mangled (int lang) | |
1296 | { | |
1297 | switch (lang) | |
1298 | { | |
1299 | default: | |
1300 | return FALSE; | |
1301 | ||
1302 | case DW_LANG_C89: | |
1303 | case DW_LANG_C: | |
1304 | case DW_LANG_Ada83: | |
1305 | case DW_LANG_Cobol74: | |
1306 | case DW_LANG_Cobol85: | |
1307 | case DW_LANG_Fortran77: | |
1308 | case DW_LANG_Pascal83: | |
1309 | case DW_LANG_C99: | |
1310 | case DW_LANG_Ada95: | |
1311 | case DW_LANG_PLI: | |
1312 | case DW_LANG_UPC: | |
1313 | case DW_LANG_C11: | |
1314 | return TRUE; | |
1315 | } | |
1316 | } | |
1317 | ||
a092b084 | 1318 | /* Source line information table routines. */ |
252b5132 RH |
1319 | |
1320 | #define FILE_ALLOC_CHUNK 5 | |
1321 | #define DIR_ALLOC_CHUNK 5 | |
1322 | ||
a092b084 NC |
1323 | struct line_info |
1324 | { | |
089e3718 IT |
1325 | struct line_info * prev_line; |
1326 | bfd_vma address; | |
1327 | char * filename; | |
1328 | unsigned int line; | |
1329 | unsigned int column; | |
1330 | unsigned int discriminator; | |
1331 | unsigned char op_index; | |
1332 | unsigned char end_sequence; /* End of (sequential) code sequence. */ | |
252b5132 RH |
1333 | }; |
1334 | ||
a092b084 NC |
1335 | struct fileinfo |
1336 | { | |
089e3718 IT |
1337 | char * name; |
1338 | unsigned int dir; | |
1339 | unsigned int time; | |
1340 | unsigned int size; | |
252b5132 RH |
1341 | }; |
1342 | ||
0ee19663 NC |
1343 | struct line_sequence |
1344 | { | |
07d6d2b8 | 1345 | bfd_vma low_pc; |
0ee19663 | 1346 | struct line_sequence* prev_sequence; |
07d6d2b8 AM |
1347 | struct line_info* last_line; /* Largest VMA. */ |
1348 | struct line_info** line_info_lookup; | |
089e3718 | 1349 | bfd_size_type num_lines; |
0ee19663 NC |
1350 | }; |
1351 | ||
a092b084 NC |
1352 | struct line_info_table |
1353 | { | |
07d6d2b8 AM |
1354 | bfd * abfd; |
1355 | unsigned int num_files; | |
1356 | unsigned int num_dirs; | |
1357 | unsigned int num_sequences; | |
1358 | char * comp_dir; | |
1359 | char ** dirs; | |
1360 | struct fileinfo* files; | |
0ee19663 | 1361 | struct line_sequence* sequences; |
07d6d2b8 | 1362 | struct line_info* lcl_head; /* Local head; used in 'add_line_info'. */ |
252b5132 RH |
1363 | }; |
1364 | ||
4ab527b0 FF |
1365 | /* Remember some information about each function. If the function is |
1366 | inlined (DW_TAG_inlined_subroutine) it may have two additional | |
1367 | attributes, DW_AT_call_file and DW_AT_call_line, which specify the | |
a2a50954 | 1368 | source code location where this function was inlined. */ |
4ab527b0 | 1369 | |
1ee24f27 DJ |
1370 | struct funcinfo |
1371 | { | |
a2a50954 | 1372 | /* Pointer to previous function in list of all functions. */ |
089e3718 | 1373 | struct funcinfo * prev_func; |
a2a50954 | 1374 | /* Pointer to function one scope higher. */ |
089e3718 | 1375 | struct funcinfo * caller_func; |
a2a50954 | 1376 | /* Source location file name where caller_func inlines this func. */ |
089e3718 | 1377 | char * caller_file; |
a2a50954 | 1378 | /* Source location file name. */ |
089e3718 | 1379 | char * file; |
e00e8198 | 1380 | /* Source location line number where caller_func inlines this func. */ |
089e3718 | 1381 | int caller_line; |
a2a50954 | 1382 | /* Source location line number. */ |
089e3718 IT |
1383 | int line; |
1384 | int tag; | |
3b0d929d | 1385 | bfd_boolean is_linkage; |
089e3718 IT |
1386 | const char * name; |
1387 | struct arange arange; | |
a2a50954 | 1388 | /* Where the symbol is defined. */ |
089e3718 IT |
1389 | asection * sec; |
1390 | }; | |
1391 | ||
1392 | struct lookup_funcinfo | |
1393 | { | |
1394 | /* Function information corresponding to this lookup table entry. */ | |
1395 | struct funcinfo * funcinfo; | |
1396 | ||
1397 | /* The lowest address for this specific function. */ | |
07d6d2b8 | 1398 | bfd_vma low_addr; |
089e3718 IT |
1399 | |
1400 | /* The highest address of this function before the lookup table is sorted. | |
1401 | The highest address of all prior functions after the lookup table is | |
1402 | sorted, which is used for binary search. */ | |
07d6d2b8 | 1403 | bfd_vma high_addr; |
5420f73d L |
1404 | }; |
1405 | ||
1406 | struct varinfo | |
1407 | { | |
709d67f1 | 1408 | /* Pointer to previous variable in list of all variables */ |
5420f73d | 1409 | struct varinfo *prev_var; |
709d67f1 | 1410 | /* Source location file name */ |
5420f73d | 1411 | char *file; |
709d67f1 | 1412 | /* Source location line number */ |
5420f73d L |
1413 | int line; |
1414 | int tag; | |
1415 | char *name; | |
5cf2e3f0 | 1416 | bfd_vma addr; |
709d67f1 | 1417 | /* Where the symbol is defined */ |
5420f73d | 1418 | asection *sec; |
709d67f1 | 1419 | /* Is this a stack variable? */ |
5420f73d | 1420 | unsigned int stack: 1; |
1ee24f27 DJ |
1421 | }; |
1422 | ||
d4c32a81 L |
1423 | /* Return TRUE if NEW_LINE should sort after LINE. */ |
1424 | ||
1425 | static inline bfd_boolean | |
1426 | new_line_sorts_after (struct line_info *new_line, struct line_info *line) | |
1427 | { | |
1428 | return (new_line->address > line->address | |
1429 | || (new_line->address == line->address | |
20230942 | 1430 | && new_line->op_index > line->op_index)); |
d4c32a81 L |
1431 | } |
1432 | ||
1433 | ||
af3ef9fe NC |
1434 | /* Adds a new entry to the line_info list in the line_info_table, ensuring |
1435 | that the list is sorted. Note that the line_info list is sorted from | |
1436 | highest to lowest VMA (with possible duplicates); that is, | |
1437 | line_info->prev_line always accesses an equal or smaller VMA. */ | |
1438 | ||
8af6b354 | 1439 | static bfd_boolean |
818a27ac AM |
1440 | add_line_info (struct line_info_table *table, |
1441 | bfd_vma address, | |
a233b20c | 1442 | unsigned char op_index, |
818a27ac AM |
1443 | char *filename, |
1444 | unsigned int line, | |
1445 | unsigned int column, | |
9b8d1a36 | 1446 | unsigned int discriminator, |
818a27ac | 1447 | int end_sequence) |
252b5132 | 1448 | { |
dc810e39 | 1449 | bfd_size_type amt = sizeof (struct line_info); |
0ee19663 | 1450 | struct line_sequence* seq = table->sequences; |
a50b1753 | 1451 | struct line_info* info = (struct line_info *) bfd_alloc (table->abfd, amt); |
252b5132 | 1452 | |
8af6b354 AM |
1453 | if (info == NULL) |
1454 | return FALSE; | |
1455 | ||
d4c32a81 | 1456 | /* Set member data of 'info'. */ |
f5296ddc | 1457 | info->prev_line = NULL; |
d4c32a81 | 1458 | info->address = address; |
a233b20c | 1459 | info->op_index = op_index; |
d4c32a81 L |
1460 | info->line = line; |
1461 | info->column = column; | |
9b8d1a36 | 1462 | info->discriminator = discriminator; |
d4c32a81 L |
1463 | info->end_sequence = end_sequence; |
1464 | ||
1465 | if (filename && filename[0]) | |
1466 | { | |
a50b1753 | 1467 | info->filename = (char *) bfd_alloc (table->abfd, strlen (filename) + 1); |
8af6b354 AM |
1468 | if (info->filename == NULL) |
1469 | return FALSE; | |
1470 | strcpy (info->filename, filename); | |
d4c32a81 L |
1471 | } |
1472 | else | |
1473 | info->filename = NULL; | |
1474 | ||
e82ce529 AM |
1475 | /* Find the correct location for 'info'. Normally we will receive |
1476 | new line_info data 1) in order and 2) with increasing VMAs. | |
1477 | However some compilers break the rules (cf. decode_line_info) and | |
1478 | so we include some heuristics for quickly finding the correct | |
1479 | location for 'info'. In particular, these heuristics optimize for | |
1480 | the common case in which the VMA sequence that we receive is a | |
1481 | list of locally sorted VMAs such as | |
1482 | p...z a...j (where a < j < p < z) | |
252b5132 | 1483 | |
e82ce529 | 1484 | Note: table->lcl_head is used to head an *actual* or *possible* |
0ee19663 | 1485 | sub-sequence within the list (such as a...j) that is not directly |
e82ce529 AM |
1486 | headed by table->last_line |
1487 | ||
1488 | Note: we may receive duplicate entries from 'decode_line_info'. */ | |
1489 | ||
0ee19663 NC |
1490 | if (seq |
1491 | && seq->last_line->address == address | |
a233b20c | 1492 | && seq->last_line->op_index == op_index |
0ee19663 | 1493 | && seq->last_line->end_sequence == end_sequence) |
aff90a5f L |
1494 | { |
1495 | /* We only keep the last entry with the same address and end | |
1496 | sequence. See PR ld/4986. */ | |
0ee19663 | 1497 | if (table->lcl_head == seq->last_line) |
aff90a5f | 1498 | table->lcl_head = info; |
0ee19663 NC |
1499 | info->prev_line = seq->last_line->prev_line; |
1500 | seq->last_line = info; | |
aff90a5f | 1501 | } |
0ee19663 | 1502 | else if (!seq || seq->last_line->end_sequence) |
d8d1c398 | 1503 | { |
0ee19663 NC |
1504 | /* Start a new line sequence. */ |
1505 | amt = sizeof (struct line_sequence); | |
1506 | seq = (struct line_sequence *) bfd_malloc (amt); | |
8af6b354 AM |
1507 | if (seq == NULL) |
1508 | return FALSE; | |
0ee19663 NC |
1509 | seq->low_pc = address; |
1510 | seq->prev_sequence = table->sequences; | |
1511 | seq->last_line = info; | |
1512 | table->lcl_head = info; | |
1513 | table->sequences = seq; | |
1514 | table->num_sequences++; | |
1515 | } | |
20230942 AM |
1516 | else if (info->end_sequence |
1517 | || new_line_sorts_after (info, seq->last_line)) | |
0ee19663 NC |
1518 | { |
1519 | /* Normal case: add 'info' to the beginning of the current sequence. */ | |
1520 | info->prev_line = seq->last_line; | |
1521 | seq->last_line = info; | |
e82ce529 | 1522 | |
d8d1c398 AM |
1523 | /* lcl_head: initialize to head a *possible* sequence at the end. */ |
1524 | if (!table->lcl_head) | |
1525 | table->lcl_head = info; | |
1526 | } | |
1527 | else if (!new_line_sorts_after (info, table->lcl_head) | |
1528 | && (!table->lcl_head->prev_line | |
1529 | || new_line_sorts_after (info, table->lcl_head->prev_line))) | |
1530 | { | |
1531 | /* Abnormal but easy: lcl_head is the head of 'info'. */ | |
1532 | info->prev_line = table->lcl_head->prev_line; | |
1533 | table->lcl_head->prev_line = info; | |
1534 | } | |
1535 | else | |
1536 | { | |
0ee19663 NC |
1537 | /* Abnormal and hard: Neither 'last_line' nor 'lcl_head' |
1538 | are valid heads for 'info'. Reset 'lcl_head'. */ | |
1539 | struct line_info* li2 = seq->last_line; /* Always non-NULL. */ | |
d8d1c398 | 1540 | struct line_info* li1 = li2->prev_line; |
e82ce529 | 1541 | |
d8d1c398 AM |
1542 | while (li1) |
1543 | { | |
1544 | if (!new_line_sorts_after (info, li2) | |
1545 | && new_line_sorts_after (info, li1)) | |
1546 | break; | |
e82ce529 | 1547 | |
709d67f1 | 1548 | li2 = li1; /* always non-NULL */ |
d8d1c398 AM |
1549 | li1 = li1->prev_line; |
1550 | } | |
1551 | table->lcl_head = li2; | |
1552 | info->prev_line = table->lcl_head->prev_line; | |
1553 | table->lcl_head->prev_line = info; | |
0ee19663 | 1554 | if (address < seq->low_pc) |
93ee1e36 | 1555 | seq->low_pc = address; |
d8d1c398 | 1556 | } |
8af6b354 | 1557 | return TRUE; |
252b5132 RH |
1558 | } |
1559 | ||
5ed6aba4 | 1560 | /* Extract a fully qualified filename from a line info table. |
af3ef9fe NC |
1561 | The returned string has been malloc'ed and it is the caller's |
1562 | responsibility to free it. */ | |
5ed6aba4 | 1563 | |
a092b084 | 1564 | static char * |
818a27ac | 1565 | concat_filename (struct line_info_table *table, unsigned int file) |
252b5132 | 1566 | { |
f075ee0c | 1567 | char *filename; |
159002ff | 1568 | |
6327533b | 1569 | if (table == NULL || file - 1 >= table->num_files) |
159002ff | 1570 | { |
75a657ba L |
1571 | /* FILE == 0 means unknown. */ |
1572 | if (file) | |
4eca0228 | 1573 | _bfd_error_handler |
9793eb77 | 1574 | (_("DWARF error: mangled line number section (bad file number)")); |
af3ef9fe | 1575 | return strdup ("<unknown>"); |
159002ff RH |
1576 | } |
1577 | ||
1578 | filename = table->files[file - 1].name; | |
a54018b7 AM |
1579 | if (filename == NULL) |
1580 | return strdup ("<unknown>"); | |
5ed6aba4 | 1581 | |
7421a730 | 1582 | if (!IS_ABSOLUTE_PATH (filename)) |
252b5132 | 1583 | { |
608fa8d3 JB |
1584 | char *dir_name = NULL; |
1585 | char *subdir_name = NULL; | |
7421a730 AM |
1586 | char *name; |
1587 | size_t len; | |
0dafd5f6 | 1588 | |
877a8638 | 1589 | if (table->files[file - 1].dir |
dbb3fbbb NC |
1590 | /* PR 17512: file: 0317e960. */ |
1591 | && table->files[file - 1].dir <= table->num_dirs | |
877a8638 NC |
1592 | /* PR 17512: file: 7f3d2e4b. */ |
1593 | && table->dirs != NULL) | |
608fa8d3 | 1594 | subdir_name = table->dirs[table->files[file - 1].dir - 1]; |
7421a730 | 1595 | |
608fa8d3 JB |
1596 | if (!subdir_name || !IS_ABSOLUTE_PATH (subdir_name)) |
1597 | dir_name = table->comp_dir; | |
7421a730 | 1598 | |
608fa8d3 | 1599 | if (!dir_name) |
af3ef9fe | 1600 | { |
608fa8d3 JB |
1601 | dir_name = subdir_name; |
1602 | subdir_name = NULL; | |
7421a730 | 1603 | } |
af3ef9fe | 1604 | |
608fa8d3 | 1605 | if (!dir_name) |
7421a730 AM |
1606 | return strdup (filename); |
1607 | ||
608fa8d3 | 1608 | len = strlen (dir_name) + strlen (filename) + 2; |
7421a730 | 1609 | |
608fa8d3 | 1610 | if (subdir_name) |
7421a730 | 1611 | { |
608fa8d3 | 1612 | len += strlen (subdir_name) + 1; |
a50b1753 | 1613 | name = (char *) bfd_malloc (len); |
7421a730 | 1614 | if (name) |
608fa8d3 | 1615 | sprintf (name, "%s/%s/%s", dir_name, subdir_name, filename); |
7421a730 AM |
1616 | } |
1617 | else | |
1618 | { | |
a50b1753 | 1619 | name = (char *) bfd_malloc (len); |
af3ef9fe | 1620 | if (name) |
608fa8d3 | 1621 | sprintf (name, "%s/%s", dir_name, filename); |
af3ef9fe | 1622 | } |
7421a730 AM |
1623 | |
1624 | return name; | |
252b5132 | 1625 | } |
af3ef9fe NC |
1626 | |
1627 | return strdup (filename); | |
252b5132 RH |
1628 | } |
1629 | ||
8af6b354 | 1630 | static bfd_boolean |
a2a50954 | 1631 | arange_add (const struct comp_unit *unit, struct arange *first_arange, |
8af6b354 | 1632 | bfd_vma low_pc, bfd_vma high_pc) |
f623be2b RH |
1633 | { |
1634 | struct arange *arange; | |
1635 | ||
a2a50954 AM |
1636 | /* Ignore empty ranges. */ |
1637 | if (low_pc == high_pc) | |
1638 | return TRUE; | |
1639 | ||
1640 | /* If the first arange is empty, use it. */ | |
a13afe8e FF |
1641 | if (first_arange->high == 0) |
1642 | { | |
1643 | first_arange->low = low_pc; | |
1644 | first_arange->high = high_pc; | |
8af6b354 | 1645 | return TRUE; |
a13afe8e | 1646 | } |
98591c73 | 1647 | |
a13afe8e FF |
1648 | /* Next see if we can cheaply extend an existing range. */ |
1649 | arange = first_arange; | |
f623be2b RH |
1650 | do |
1651 | { | |
1652 | if (low_pc == arange->high) | |
1653 | { | |
1654 | arange->high = high_pc; | |
8af6b354 | 1655 | return TRUE; |
f623be2b RH |
1656 | } |
1657 | if (high_pc == arange->low) | |
1658 | { | |
1659 | arange->low = low_pc; | |
8af6b354 | 1660 | return TRUE; |
f623be2b RH |
1661 | } |
1662 | arange = arange->next; | |
1663 | } | |
1664 | while (arange); | |
1665 | ||
a13afe8e | 1666 | /* Need to allocate a new arange and insert it into the arange list. |
089e3718 | 1667 | Order isn't significant, so just insert after the first arange. */ |
a2a50954 | 1668 | arange = (struct arange *) bfd_alloc (unit->abfd, sizeof (*arange)); |
8af6b354 AM |
1669 | if (arange == NULL) |
1670 | return FALSE; | |
f623be2b RH |
1671 | arange->low = low_pc; |
1672 | arange->high = high_pc; | |
a13afe8e FF |
1673 | arange->next = first_arange->next; |
1674 | first_arange->next = arange; | |
8af6b354 | 1675 | return TRUE; |
f623be2b RH |
1676 | } |
1677 | ||
0ee19663 NC |
1678 | /* Compare function for line sequences. */ |
1679 | ||
1680 | static int | |
1681 | compare_sequences (const void* a, const void* b) | |
1682 | { | |
1683 | const struct line_sequence* seq1 = a; | |
1684 | const struct line_sequence* seq2 = b; | |
1685 | ||
1686 | /* Sort by low_pc as the primary key. */ | |
1687 | if (seq1->low_pc < seq2->low_pc) | |
1688 | return -1; | |
1689 | if (seq1->low_pc > seq2->low_pc) | |
1690 | return 1; | |
1691 | ||
1692 | /* If low_pc values are equal, sort in reverse order of | |
1693 | high_pc, so that the largest region comes first. */ | |
1694 | if (seq1->last_line->address < seq2->last_line->address) | |
1695 | return 1; | |
1696 | if (seq1->last_line->address > seq2->last_line->address) | |
1697 | return -1; | |
1698 | ||
a233b20c JJ |
1699 | if (seq1->last_line->op_index < seq2->last_line->op_index) |
1700 | return 1; | |
1701 | if (seq1->last_line->op_index > seq2->last_line->op_index) | |
1702 | return -1; | |
1703 | ||
0ee19663 NC |
1704 | return 0; |
1705 | } | |
1706 | ||
089e3718 IT |
1707 | /* Construct the line information table for quick lookup. */ |
1708 | ||
1709 | static bfd_boolean | |
1710 | build_line_info_table (struct line_info_table * table, | |
1711 | struct line_sequence * seq) | |
1712 | { | |
1713 | bfd_size_type amt; | |
1714 | struct line_info** line_info_lookup; | |
1715 | struct line_info* each_line; | |
1716 | unsigned int num_lines; | |
b6ddcd85 | 1717 | unsigned int line_index; |
089e3718 IT |
1718 | |
1719 | if (seq->line_info_lookup != NULL) | |
1720 | return TRUE; | |
1721 | ||
1722 | /* Count the number of line information entries. We could do this while | |
1723 | scanning the debug information, but some entries may be added via | |
1724 | lcl_head without having a sequence handy to increment the number of | |
1725 | lines. */ | |
1726 | num_lines = 0; | |
1727 | for (each_line = seq->last_line; each_line; each_line = each_line->prev_line) | |
1728 | num_lines++; | |
1729 | ||
1730 | if (num_lines == 0) | |
1731 | return TRUE; | |
1732 | ||
1733 | /* Allocate space for the line information lookup table. */ | |
1734 | amt = sizeof (struct line_info*) * num_lines; | |
1735 | line_info_lookup = (struct line_info**) bfd_alloc (table->abfd, amt); | |
1736 | if (line_info_lookup == NULL) | |
1737 | return FALSE; | |
1738 | ||
1739 | /* Create the line information lookup table. */ | |
b6ddcd85 | 1740 | line_index = num_lines; |
089e3718 | 1741 | for (each_line = seq->last_line; each_line; each_line = each_line->prev_line) |
b6ddcd85 | 1742 | line_info_lookup[--line_index] = each_line; |
089e3718 | 1743 | |
b6ddcd85 | 1744 | BFD_ASSERT (line_index == 0); |
089e3718 IT |
1745 | |
1746 | seq->num_lines = num_lines; | |
1747 | seq->line_info_lookup = line_info_lookup; | |
1748 | ||
1749 | return TRUE; | |
1750 | } | |
1751 | ||
0ee19663 NC |
1752 | /* Sort the line sequences for quick lookup. */ |
1753 | ||
8af6b354 | 1754 | static bfd_boolean |
0ee19663 NC |
1755 | sort_line_sequences (struct line_info_table* table) |
1756 | { | |
07d6d2b8 AM |
1757 | bfd_size_type amt; |
1758 | struct line_sequence* sequences; | |
1759 | struct line_sequence* seq; | |
1760 | unsigned int n = 0; | |
1761 | unsigned int num_sequences = table->num_sequences; | |
1762 | bfd_vma last_high_pc; | |
0ee19663 NC |
1763 | |
1764 | if (num_sequences == 0) | |
8af6b354 | 1765 | return TRUE; |
0ee19663 NC |
1766 | |
1767 | /* Allocate space for an array of sequences. */ | |
1768 | amt = sizeof (struct line_sequence) * num_sequences; | |
1769 | sequences = (struct line_sequence *) bfd_alloc (table->abfd, amt); | |
8af6b354 AM |
1770 | if (sequences == NULL) |
1771 | return FALSE; | |
0ee19663 NC |
1772 | |
1773 | /* Copy the linked list into the array, freeing the original nodes. */ | |
1774 | seq = table->sequences; | |
1775 | for (n = 0; n < num_sequences; n++) | |
1776 | { | |
1777 | struct line_sequence* last_seq = seq; | |
1778 | ||
1779 | BFD_ASSERT (seq); | |
1780 | sequences[n].low_pc = seq->low_pc; | |
1781 | sequences[n].prev_sequence = NULL; | |
1782 | sequences[n].last_line = seq->last_line; | |
089e3718 IT |
1783 | sequences[n].line_info_lookup = NULL; |
1784 | sequences[n].num_lines = 0; | |
0ee19663 NC |
1785 | seq = seq->prev_sequence; |
1786 | free (last_seq); | |
1787 | } | |
1788 | BFD_ASSERT (seq == NULL); | |
1789 | ||
1790 | qsort (sequences, n, sizeof (struct line_sequence), compare_sequences); | |
1791 | ||
1792 | /* Make the list binary-searchable by trimming overlapping entries | |
1793 | and removing nested entries. */ | |
1794 | num_sequences = 1; | |
1795 | last_high_pc = sequences[0].last_line->address; | |
1796 | for (n = 1; n < table->num_sequences; n++) | |
1797 | { | |
1798 | if (sequences[n].low_pc < last_high_pc) | |
93ee1e36 | 1799 | { |
0ee19663 NC |
1800 | if (sequences[n].last_line->address <= last_high_pc) |
1801 | /* Skip nested entries. */ | |
1802 | continue; | |
1803 | ||
1804 | /* Trim overlapping entries. */ | |
1805 | sequences[n].low_pc = last_high_pc; | |
93ee1e36 | 1806 | } |
0ee19663 NC |
1807 | last_high_pc = sequences[n].last_line->address; |
1808 | if (n > num_sequences) | |
93ee1e36 AM |
1809 | { |
1810 | /* Close up the gap. */ | |
1811 | sequences[num_sequences].low_pc = sequences[n].low_pc; | |
1812 | sequences[num_sequences].last_line = sequences[n].last_line; | |
1813 | } | |
0ee19663 NC |
1814 | num_sequences++; |
1815 | } | |
1816 | ||
1817 | table->sequences = sequences; | |
1818 | table->num_sequences = num_sequences; | |
8af6b354 | 1819 | return TRUE; |
0ee19663 NC |
1820 | } |
1821 | ||
0041f7df JK |
1822 | /* Add directory to TABLE. CUR_DIR memory ownership is taken by TABLE. */ |
1823 | ||
1824 | static bfd_boolean | |
1825 | line_info_add_include_dir (struct line_info_table *table, char *cur_dir) | |
1826 | { | |
1827 | if ((table->num_dirs % DIR_ALLOC_CHUNK) == 0) | |
1828 | { | |
1829 | char **tmp; | |
1830 | bfd_size_type amt; | |
1831 | ||
1832 | amt = table->num_dirs + DIR_ALLOC_CHUNK; | |
1833 | amt *= sizeof (char *); | |
1834 | ||
1835 | tmp = (char **) bfd_realloc (table->dirs, amt); | |
1836 | if (tmp == NULL) | |
1837 | return FALSE; | |
1838 | table->dirs = tmp; | |
1839 | } | |
1840 | ||
1841 | table->dirs[table->num_dirs++] = cur_dir; | |
1842 | return TRUE; | |
1843 | } | |
1844 | ||
1845 | static bfd_boolean | |
1846 | line_info_add_include_dir_stub (struct line_info_table *table, char *cur_dir, | |
1847 | unsigned int dir ATTRIBUTE_UNUSED, | |
1d827a72 | 1848 | unsigned int xtime ATTRIBUTE_UNUSED, |
0041f7df JK |
1849 | unsigned int size ATTRIBUTE_UNUSED) |
1850 | { | |
1851 | return line_info_add_include_dir (table, cur_dir); | |
1852 | } | |
1853 | ||
1854 | /* Add file to TABLE. CUR_FILE memory ownership is taken by TABLE. */ | |
1855 | ||
1856 | static bfd_boolean | |
1857 | line_info_add_file_name (struct line_info_table *table, char *cur_file, | |
1d827a72 L |
1858 | unsigned int dir, unsigned int xtime, |
1859 | unsigned int size) | |
0041f7df JK |
1860 | { |
1861 | if ((table->num_files % FILE_ALLOC_CHUNK) == 0) | |
1862 | { | |
1863 | struct fileinfo *tmp; | |
1864 | bfd_size_type amt; | |
1865 | ||
1866 | amt = table->num_files + FILE_ALLOC_CHUNK; | |
1867 | amt *= sizeof (struct fileinfo); | |
1868 | ||
1869 | tmp = (struct fileinfo *) bfd_realloc (table->files, amt); | |
1870 | if (tmp == NULL) | |
1871 | return FALSE; | |
1872 | table->files = tmp; | |
1873 | } | |
1874 | ||
1875 | table->files[table->num_files].name = cur_file; | |
1876 | table->files[table->num_files].dir = dir; | |
1d827a72 | 1877 | table->files[table->num_files].time = xtime; |
0041f7df JK |
1878 | table->files[table->num_files].size = size; |
1879 | table->num_files++; | |
1880 | return TRUE; | |
1881 | } | |
1882 | ||
1883 | /* Read directory or file name entry format, starting with byte of | |
1884 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
1885 | entries count and the entries themselves in the described entry | |
1886 | format. */ | |
1887 | ||
1888 | static bfd_boolean | |
1889 | read_formatted_entries (struct comp_unit *unit, bfd_byte **bufp, | |
1890 | bfd_byte *buf_end, struct line_info_table *table, | |
1891 | bfd_boolean (*callback) (struct line_info_table *table, | |
1892 | char *cur_file, | |
1893 | unsigned int dir, | |
1894 | unsigned int time, | |
1895 | unsigned int size)) | |
1896 | { | |
1897 | bfd *abfd = unit->abfd; | |
1898 | bfd_byte format_count, formati; | |
1899 | bfd_vma data_count, datai; | |
1900 | bfd_byte *buf = *bufp; | |
1901 | bfd_byte *format_header_data; | |
1902 | unsigned int bytes_read; | |
1903 | ||
1904 | format_count = read_1_byte (abfd, buf, buf_end); | |
1905 | buf += 1; | |
1906 | format_header_data = buf; | |
1907 | for (formati = 0; formati < format_count; formati++) | |
1908 | { | |
1909 | _bfd_safe_read_leb128 (abfd, buf, &bytes_read, FALSE, buf_end); | |
1910 | buf += bytes_read; | |
1911 | _bfd_safe_read_leb128 (abfd, buf, &bytes_read, FALSE, buf_end); | |
1912 | buf += bytes_read; | |
1913 | } | |
1914 | ||
1915 | data_count = _bfd_safe_read_leb128 (abfd, buf, &bytes_read, FALSE, buf_end); | |
1916 | buf += bytes_read; | |
c361faae AM |
1917 | if (format_count == 0 && data_count != 0) |
1918 | { | |
9793eb77 | 1919 | _bfd_error_handler (_("DWARF error: zero format count")); |
c361faae AM |
1920 | bfd_set_error (bfd_error_bad_value); |
1921 | return FALSE; | |
1922 | } | |
1923 | ||
30d0157a NC |
1924 | /* PR 22210. Paranoia check. Don't bother running the loop |
1925 | if we know that we are going to run out of buffer. */ | |
1926 | if (data_count > (bfd_vma) (buf_end - buf)) | |
1927 | { | |
2dcf00ce | 1928 | _bfd_error_handler |
9793eb77 | 1929 | (_("DWARF error: data count (%" PRIx64 ") larger than buffer size"), |
2dcf00ce | 1930 | (uint64_t) data_count); |
30d0157a NC |
1931 | bfd_set_error (bfd_error_bad_value); |
1932 | return FALSE; | |
1933 | } | |
1934 | ||
0041f7df JK |
1935 | for (datai = 0; datai < data_count; datai++) |
1936 | { | |
1937 | bfd_byte *format = format_header_data; | |
1938 | struct fileinfo fe; | |
1939 | ||
a54018b7 | 1940 | memset (&fe, 0, sizeof fe); |
0041f7df JK |
1941 | for (formati = 0; formati < format_count; formati++) |
1942 | { | |
1943 | bfd_vma content_type, form; | |
1944 | char *string_trash; | |
1945 | char **stringp = &string_trash; | |
1946 | unsigned int uint_trash, *uintp = &uint_trash; | |
33e0a9a0 | 1947 | struct attribute attr; |
0041f7df JK |
1948 | |
1949 | content_type = _bfd_safe_read_leb128 (abfd, format, &bytes_read, | |
1950 | FALSE, buf_end); | |
1951 | format += bytes_read; | |
1952 | switch (content_type) | |
1953 | { | |
1954 | case DW_LNCT_path: | |
1955 | stringp = &fe.name; | |
1956 | break; | |
1957 | case DW_LNCT_directory_index: | |
1958 | uintp = &fe.dir; | |
1959 | break; | |
1960 | case DW_LNCT_timestamp: | |
1961 | uintp = &fe.time; | |
1962 | break; | |
1963 | case DW_LNCT_size: | |
1964 | uintp = &fe.size; | |
1965 | break; | |
1966 | case DW_LNCT_MD5: | |
1967 | break; | |
1968 | default: | |
1969 | _bfd_error_handler | |
9793eb77 | 1970 | (_("DWARF error: unknown format content type %" PRIu64), |
2dcf00ce | 1971 | (uint64_t) content_type); |
0041f7df JK |
1972 | bfd_set_error (bfd_error_bad_value); |
1973 | return FALSE; | |
1974 | } | |
1975 | ||
1976 | form = _bfd_safe_read_leb128 (abfd, format, &bytes_read, FALSE, | |
1977 | buf_end); | |
1978 | format += bytes_read; | |
33e0a9a0 AM |
1979 | |
1980 | buf = read_attribute_value (&attr, form, 0, unit, buf, buf_end); | |
1981 | if (buf == NULL) | |
1982 | return FALSE; | |
0041f7df JK |
1983 | switch (form) |
1984 | { | |
1985 | case DW_FORM_string: | |
0041f7df | 1986 | case DW_FORM_line_strp: |
33e0a9a0 | 1987 | *stringp = attr.u.str; |
0041f7df JK |
1988 | break; |
1989 | ||
1990 | case DW_FORM_data1: | |
0041f7df | 1991 | case DW_FORM_data2: |
0041f7df | 1992 | case DW_FORM_data4: |
0041f7df | 1993 | case DW_FORM_data8: |
0041f7df | 1994 | case DW_FORM_udata: |
33e0a9a0 | 1995 | *uintp = attr.u.val; |
0041f7df JK |
1996 | break; |
1997 | } | |
1998 | } | |
1999 | ||
2000 | if (!callback (table, fe.name, fe.dir, fe.time, fe.size)) | |
2001 | return FALSE; | |
2002 | } | |
2003 | ||
2004 | *bufp = buf; | |
2005 | return TRUE; | |
2006 | } | |
2007 | ||
34b5e0b2 | 2008 | /* Decode the line number information for UNIT. */ |
252b5132 | 2009 | |
34b5e0b2 | 2010 | static struct line_info_table* |
818a27ac | 2011 | decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) |
252b5132 RH |
2012 | { |
2013 | bfd *abfd = unit->abfd; | |
252b5132 | 2014 | struct line_info_table* table; |
f075ee0c AM |
2015 | bfd_byte *line_ptr; |
2016 | bfd_byte *line_end; | |
252b5132 | 2017 | struct line_head lh; |
d03ba2a1 | 2018 | unsigned int i, bytes_read, offset_size; |
252b5132 RH |
2019 | char *cur_file, *cur_dir; |
2020 | unsigned char op_code, extended_op, adj_opcode; | |
fec16237 | 2021 | unsigned int exop_len; |
dc810e39 | 2022 | bfd_size_type amt; |
252b5132 | 2023 | |
fc28f9aa | 2024 | if (! read_section (abfd, &stash->debug_sections[debug_line], |
93ee1e36 | 2025 | stash->syms, unit->line_offset, |
9e32b19f | 2026 | &stash->dwarf_line_buffer, &stash->dwarf_line_size)) |
8af6b354 | 2027 | return NULL; |
ccdb16fc | 2028 | |
dc810e39 | 2029 | amt = sizeof (struct line_info_table); |
a50b1753 | 2030 | table = (struct line_info_table *) bfd_alloc (abfd, amt); |
8af6b354 AM |
2031 | if (table == NULL) |
2032 | return NULL; | |
252b5132 RH |
2033 | table->abfd = abfd; |
2034 | table->comp_dir = unit->comp_dir; | |
2035 | ||
2036 | table->num_files = 0; | |
2037 | table->files = NULL; | |
2038 | ||
2039 | table->num_dirs = 0; | |
2040 | table->dirs = NULL; | |
2041 | ||
0ee19663 NC |
2042 | table->num_sequences = 0; |
2043 | table->sequences = NULL; | |
2044 | ||
e82ce529 | 2045 | table->lcl_head = NULL; |
159002ff | 2046 | |
dbb3fbbb NC |
2047 | if (stash->dwarf_line_size < 16) |
2048 | { | |
4eca0228 | 2049 | _bfd_error_handler |
9793eb77 | 2050 | (_("DWARF error: line info section is too small (%" PRId64 ")"), |
2dcf00ce | 2051 | (int64_t) stash->dwarf_line_size); |
dbb3fbbb NC |
2052 | bfd_set_error (bfd_error_bad_value); |
2053 | return NULL; | |
2054 | } | |
69dd2e2d | 2055 | line_ptr = stash->dwarf_line_buffer + unit->line_offset; |
dbb3fbbb | 2056 | line_end = stash->dwarf_line_buffer + stash->dwarf_line_size; |
252b5132 | 2057 | |
a092b084 | 2058 | /* Read in the prologue. */ |
dbb3fbbb | 2059 | lh.total_length = read_4_bytes (abfd, line_ptr, line_end); |
91a4d569 AM |
2060 | line_ptr += 4; |
2061 | offset_size = 4; | |
2062 | if (lh.total_length == 0xffffffff) | |
dae2dd0d | 2063 | { |
dbb3fbbb | 2064 | lh.total_length = read_8_bytes (abfd, line_ptr, line_end); |
dae2dd0d NC |
2065 | line_ptr += 8; |
2066 | offset_size = 8; | |
2067 | } | |
91a4d569 | 2068 | else if (lh.total_length == 0 && unit->addr_size == 8) |
d03ba2a1 | 2069 | { |
91a4d569 | 2070 | /* Handle (non-standard) 64-bit DWARF2 formats. */ |
dbb3fbbb | 2071 | lh.total_length = read_4_bytes (abfd, line_ptr, line_end); |
91a4d569 | 2072 | line_ptr += 4; |
d03ba2a1 JJ |
2073 | offset_size = 8; |
2074 | } | |
dbb3fbbb | 2075 | |
515f23e6 | 2076 | if (lh.total_length > (size_t) (line_end - line_ptr)) |
dbb3fbbb | 2077 | { |
4eca0228 | 2078 | _bfd_error_handler |
695344c0 | 2079 | /* xgettext: c-format */ |
9793eb77 | 2080 | (_("DWARF error: line info data is bigger (%#" PRIx64 ")" |
515f23e6 | 2081 | " than the space remaining in the section (%#lx)"), |
2dcf00ce | 2082 | (uint64_t) lh.total_length, (unsigned long) (line_end - line_ptr)); |
dbb3fbbb NC |
2083 | bfd_set_error (bfd_error_bad_value); |
2084 | return NULL; | |
2085 | } | |
62f8d217 | 2086 | |
252b5132 | 2087 | line_end = line_ptr + lh.total_length; |
62f8d217 | 2088 | |
dbb3fbbb | 2089 | lh.version = read_2_bytes (abfd, line_ptr, line_end); |
0041f7df | 2090 | if (lh.version < 2 || lh.version > 5) |
a233b20c | 2091 | { |
4eca0228 | 2092 | _bfd_error_handler |
9793eb77 | 2093 | (_("DWARF error: unhandled .debug_line version %d"), lh.version); |
a233b20c JJ |
2094 | bfd_set_error (bfd_error_bad_value); |
2095 | return NULL; | |
2096 | } | |
252b5132 | 2097 | line_ptr += 2; |
dbb3fbbb | 2098 | |
0041f7df JK |
2099 | if (line_ptr + offset_size + (lh.version >= 5 ? 8 : (lh.version >= 4 ? 6 : 5)) |
2100 | >= line_end) | |
dbb3fbbb | 2101 | { |
4eca0228 | 2102 | _bfd_error_handler |
9793eb77 | 2103 | (_("DWARF error: ran out of room reading prologue")); |
dbb3fbbb NC |
2104 | bfd_set_error (bfd_error_bad_value); |
2105 | return NULL; | |
2106 | } | |
2107 | ||
0041f7df JK |
2108 | if (lh.version >= 5) |
2109 | { | |
2110 | unsigned int segment_selector_size; | |
2111 | ||
2112 | /* Skip address size. */ | |
2113 | read_1_byte (abfd, line_ptr, line_end); | |
2114 | line_ptr += 1; | |
2115 | ||
2116 | segment_selector_size = read_1_byte (abfd, line_ptr, line_end); | |
2117 | line_ptr += 1; | |
2118 | if (segment_selector_size != 0) | |
2119 | { | |
2120 | _bfd_error_handler | |
9793eb77 | 2121 | (_("DWARF error: line info unsupported segment selector size %u"), |
0041f7df JK |
2122 | segment_selector_size); |
2123 | bfd_set_error (bfd_error_bad_value); | |
2124 | return NULL; | |
2125 | } | |
2126 | } | |
2127 | ||
d03ba2a1 | 2128 | if (offset_size == 4) |
dbb3fbbb | 2129 | lh.prologue_length = read_4_bytes (abfd, line_ptr, line_end); |
d03ba2a1 | 2130 | else |
dbb3fbbb | 2131 | lh.prologue_length = read_8_bytes (abfd, line_ptr, line_end); |
d03ba2a1 | 2132 | line_ptr += offset_size; |
dbb3fbbb NC |
2133 | |
2134 | lh.minimum_instruction_length = read_1_byte (abfd, line_ptr, line_end); | |
252b5132 | 2135 | line_ptr += 1; |
dbb3fbbb | 2136 | |
a233b20c JJ |
2137 | if (lh.version >= 4) |
2138 | { | |
dbb3fbbb | 2139 | lh.maximum_ops_per_insn = read_1_byte (abfd, line_ptr, line_end); |
a233b20c JJ |
2140 | line_ptr += 1; |
2141 | } | |
2142 | else | |
2143 | lh.maximum_ops_per_insn = 1; | |
dbb3fbbb | 2144 | |
a233b20c JJ |
2145 | if (lh.maximum_ops_per_insn == 0) |
2146 | { | |
4eca0228 | 2147 | _bfd_error_handler |
9793eb77 | 2148 | (_("DWARF error: invalid maximum operations per instruction")); |
a233b20c JJ |
2149 | bfd_set_error (bfd_error_bad_value); |
2150 | return NULL; | |
2151 | } | |
dbb3fbbb NC |
2152 | |
2153 | lh.default_is_stmt = read_1_byte (abfd, line_ptr, line_end); | |
252b5132 | 2154 | line_ptr += 1; |
dbb3fbbb NC |
2155 | |
2156 | lh.line_base = read_1_signed_byte (abfd, line_ptr, line_end); | |
252b5132 | 2157 | line_ptr += 1; |
dbb3fbbb NC |
2158 | |
2159 | lh.line_range = read_1_byte (abfd, line_ptr, line_end); | |
252b5132 | 2160 | line_ptr += 1; |
dbb3fbbb NC |
2161 | |
2162 | lh.opcode_base = read_1_byte (abfd, line_ptr, line_end); | |
252b5132 | 2163 | line_ptr += 1; |
dbb3fbbb NC |
2164 | |
2165 | if (line_ptr + (lh.opcode_base - 1) >= line_end) | |
2166 | { | |
9793eb77 | 2167 | _bfd_error_handler (_("DWARF error: ran out of room reading opcodes")); |
dbb3fbbb NC |
2168 | bfd_set_error (bfd_error_bad_value); |
2169 | return NULL; | |
2170 | } | |
62f8d217 | 2171 | |
dc810e39 | 2172 | amt = lh.opcode_base * sizeof (unsigned char); |
a50b1753 | 2173 | lh.standard_opcode_lengths = (unsigned char *) bfd_alloc (abfd, amt); |
252b5132 RH |
2174 | |
2175 | lh.standard_opcode_lengths[0] = 1; | |
98591c73 | 2176 | |
252b5132 RH |
2177 | for (i = 1; i < lh.opcode_base; ++i) |
2178 | { | |
dbb3fbbb | 2179 | lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr, line_end); |
252b5132 RH |
2180 | line_ptr += 1; |
2181 | } | |
2182 | ||
0041f7df | 2183 | if (lh.version >= 5) |
252b5132 | 2184 | { |
0041f7df JK |
2185 | /* Read directory table. */ |
2186 | if (!read_formatted_entries (unit, &line_ptr, line_end, table, | |
2187 | line_info_add_include_dir_stub)) | |
2188 | goto fail; | |
98591c73 | 2189 | |
0041f7df JK |
2190 | /* Read file name table. */ |
2191 | if (!read_formatted_entries (unit, &line_ptr, line_end, table, | |
2192 | line_info_add_file_name)) | |
2193 | goto fail; | |
2194 | } | |
2195 | else | |
2196 | { | |
2197 | /* Read directory table. */ | |
2198 | while ((cur_dir = read_string (abfd, line_ptr, line_end, &bytes_read)) != NULL) | |
252b5132 | 2199 | { |
0041f7df | 2200 | line_ptr += bytes_read; |
35330cce | 2201 | |
0041f7df | 2202 | if (!line_info_add_include_dir (table, cur_dir)) |
8af6b354 | 2203 | goto fail; |
252b5132 | 2204 | } |
98591c73 | 2205 | |
252b5132 | 2206 | line_ptr += bytes_read; |
98591c73 | 2207 | |
0041f7df JK |
2208 | /* Read file name table. */ |
2209 | while ((cur_file = read_string (abfd, line_ptr, line_end, &bytes_read)) != NULL) | |
252b5132 | 2210 | { |
1d827a72 | 2211 | unsigned int dir, xtime, size; |
0041f7df JK |
2212 | |
2213 | line_ptr += bytes_read; | |
35330cce | 2214 | |
0041f7df JK |
2215 | dir = _bfd_safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); |
2216 | line_ptr += bytes_read; | |
1d827a72 | 2217 | xtime = _bfd_safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); |
0041f7df JK |
2218 | line_ptr += bytes_read; |
2219 | size = _bfd_safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); | |
2220 | line_ptr += bytes_read; | |
35330cce | 2221 | |
1d827a72 | 2222 | if (!line_info_add_file_name (table, cur_file, dir, xtime, size)) |
8af6b354 | 2223 | goto fail; |
252b5132 | 2224 | } |
98591c73 | 2225 | |
252b5132 | 2226 | line_ptr += bytes_read; |
252b5132 | 2227 | } |
98591c73 | 2228 | |
252b5132 RH |
2229 | /* Read the statement sequences until there's nothing left. */ |
2230 | while (line_ptr < line_end) | |
2231 | { | |
a092b084 | 2232 | /* State machine registers. */ |
252b5132 | 2233 | bfd_vma address = 0; |
a233b20c | 2234 | unsigned char op_index = 0; |
8bfd78b3 | 2235 | char * filename = table->num_files ? concat_filename (table, 1) : NULL; |
252b5132 RH |
2236 | unsigned int line = 1; |
2237 | unsigned int column = 0; | |
9b8d1a36 | 2238 | unsigned int discriminator = 0; |
252b5132 | 2239 | int is_stmt = lh.default_is_stmt; |
e2f6d277 | 2240 | int end_sequence = 0; |
a54018b7 | 2241 | unsigned int dir, xtime, size; |
e2f6d277 | 2242 | /* eraxxon@alumni.rice.edu: Against the DWARF2 specs, some |
e82ce529 AM |
2243 | compilers generate address sequences that are wildly out of |
2244 | order using DW_LNE_set_address (e.g. Intel C++ 6.0 compiler | |
2245 | for ia64-Linux). Thus, to determine the low and high | |
2246 | address, we must compare on every DW_LNS_copy, etc. */ | |
75758e9d | 2247 | bfd_vma low_pc = (bfd_vma) -1; |
e2f6d277 | 2248 | bfd_vma high_pc = 0; |
252b5132 | 2249 | |
a092b084 | 2250 | /* Decode the table. */ |
e338894d | 2251 | while (!end_sequence && line_ptr < line_end) |
252b5132 | 2252 | { |
dbb3fbbb | 2253 | op_code = read_1_byte (abfd, line_ptr, line_end); |
252b5132 | 2254 | line_ptr += 1; |
98591c73 | 2255 | |
1a509dcc | 2256 | if (op_code >= lh.opcode_base) |
e2f6d277 NC |
2257 | { |
2258 | /* Special operand. */ | |
1a509dcc | 2259 | adj_opcode = op_code - lh.opcode_base; |
dbb3fbbb NC |
2260 | if (lh.line_range == 0) |
2261 | goto line_fail; | |
a233b20c | 2262 | if (lh.maximum_ops_per_insn == 1) |
a2a50954 AM |
2263 | address += (adj_opcode / lh.line_range |
2264 | * lh.minimum_instruction_length); | |
a233b20c JJ |
2265 | else |
2266 | { | |
a2a50954 AM |
2267 | address += ((op_index + adj_opcode / lh.line_range) |
2268 | / lh.maximum_ops_per_insn | |
2269 | * lh.minimum_instruction_length); | |
2270 | op_index = ((op_index + adj_opcode / lh.line_range) | |
2271 | % lh.maximum_ops_per_insn); | |
a233b20c | 2272 | } |
1a509dcc GK |
2273 | line += lh.line_base + (adj_opcode % lh.line_range); |
2274 | /* Append row to matrix using current values. */ | |
a233b20c | 2275 | if (!add_line_info (table, address, op_index, filename, |
9b8d1a36 | 2276 | line, column, discriminator, 0)) |
8af6b354 | 2277 | goto line_fail; |
93ee1e36 | 2278 | discriminator = 0; |
75758e9d AM |
2279 | if (address < low_pc) |
2280 | low_pc = address; | |
e2f6d277 NC |
2281 | if (address > high_pc) |
2282 | high_pc = address; | |
1a509dcc GK |
2283 | } |
2284 | else switch (op_code) | |
252b5132 RH |
2285 | { |
2286 | case DW_LNS_extended_op: | |
4265548c PA |
2287 | exop_len = _bfd_safe_read_leb128 (abfd, line_ptr, &bytes_read, |
2288 | FALSE, line_end); | |
fec16237 | 2289 | line_ptr += bytes_read; |
dbb3fbbb | 2290 | extended_op = read_1_byte (abfd, line_ptr, line_end); |
252b5132 | 2291 | line_ptr += 1; |
e2f6d277 | 2292 | |
252b5132 RH |
2293 | switch (extended_op) |
2294 | { | |
2295 | case DW_LNE_end_sequence: | |
2296 | end_sequence = 1; | |
9b8d1a36 CC |
2297 | if (!add_line_info (table, address, op_index, filename, line, |
2298 | column, discriminator, end_sequence)) | |
8af6b354 | 2299 | goto line_fail; |
93ee1e36 | 2300 | discriminator = 0; |
75758e9d AM |
2301 | if (address < low_pc) |
2302 | low_pc = address; | |
e2f6d277 NC |
2303 | if (address > high_pc) |
2304 | high_pc = address; | |
a2a50954 | 2305 | if (!arange_add (unit, &unit->arange, low_pc, high_pc)) |
8af6b354 | 2306 | goto line_fail; |
252b5132 RH |
2307 | break; |
2308 | case DW_LNE_set_address: | |
dbb3fbbb | 2309 | address = read_address (unit, line_ptr, line_end); |
a233b20c | 2310 | op_index = 0; |
252b5132 RH |
2311 | line_ptr += unit->addr_size; |
2312 | break; | |
2313 | case DW_LNE_define_file: | |
dbb3fbbb | 2314 | cur_file = read_string (abfd, line_ptr, line_end, &bytes_read); |
252b5132 | 2315 | line_ptr += bytes_read; |
a54018b7 AM |
2316 | dir = _bfd_safe_read_leb128 (abfd, line_ptr, &bytes_read, |
2317 | FALSE, line_end); | |
252b5132 | 2318 | line_ptr += bytes_read; |
a54018b7 AM |
2319 | xtime = _bfd_safe_read_leb128 (abfd, line_ptr, &bytes_read, |
2320 | FALSE, line_end); | |
252b5132 | 2321 | line_ptr += bytes_read; |
a54018b7 AM |
2322 | size = _bfd_safe_read_leb128 (abfd, line_ptr, &bytes_read, |
2323 | FALSE, line_end); | |
252b5132 | 2324 | line_ptr += bytes_read; |
a54018b7 AM |
2325 | if (!line_info_add_file_name (table, cur_file, dir, |
2326 | xtime, size)) | |
2327 | goto line_fail; | |
252b5132 | 2328 | break; |
9e1f7c0e | 2329 | case DW_LNE_set_discriminator: |
9b8d1a36 | 2330 | discriminator = |
4265548c PA |
2331 | _bfd_safe_read_leb128 (abfd, line_ptr, &bytes_read, |
2332 | FALSE, line_end); | |
9e1f7c0e DK |
2333 | line_ptr += bytes_read; |
2334 | break; | |
a2a50954 AM |
2335 | case DW_LNE_HP_source_file_correlation: |
2336 | line_ptr += exop_len - 1; | |
2337 | break; | |
252b5132 | 2338 | default: |
4eca0228 | 2339 | _bfd_error_handler |
9793eb77 | 2340 | (_("DWARF error: mangled line number section")); |
252b5132 | 2341 | bfd_set_error (bfd_error_bad_value); |
8af6b354 AM |
2342 | line_fail: |
2343 | if (filename != NULL) | |
2344 | free (filename); | |
2345 | goto fail; | |
252b5132 RH |
2346 | } |
2347 | break; | |
2348 | case DW_LNS_copy: | |
a233b20c | 2349 | if (!add_line_info (table, address, op_index, |
9b8d1a36 | 2350 | filename, line, column, discriminator, 0)) |
8af6b354 | 2351 | goto line_fail; |
93ee1e36 | 2352 | discriminator = 0; |
75758e9d AM |
2353 | if (address < low_pc) |
2354 | low_pc = address; | |
e2f6d277 NC |
2355 | if (address > high_pc) |
2356 | high_pc = address; | |
252b5132 RH |
2357 | break; |
2358 | case DW_LNS_advance_pc: | |
a233b20c | 2359 | if (lh.maximum_ops_per_insn == 1) |
a2a50954 | 2360 | address += (lh.minimum_instruction_length |
4265548c PA |
2361 | * _bfd_safe_read_leb128 (abfd, line_ptr, |
2362 | &bytes_read, | |
2363 | FALSE, line_end)); | |
a233b20c JJ |
2364 | else |
2365 | { | |
4265548c PA |
2366 | bfd_vma adjust = _bfd_safe_read_leb128 (abfd, line_ptr, |
2367 | &bytes_read, | |
2368 | FALSE, line_end); | |
a2a50954 AM |
2369 | address = ((op_index + adjust) / lh.maximum_ops_per_insn |
2370 | * lh.minimum_instruction_length); | |
a233b20c JJ |
2371 | op_index = (op_index + adjust) % lh.maximum_ops_per_insn; |
2372 | } | |
252b5132 RH |
2373 | line_ptr += bytes_read; |
2374 | break; | |
2375 | case DW_LNS_advance_line: | |
4265548c PA |
2376 | line += _bfd_safe_read_leb128 (abfd, line_ptr, &bytes_read, |
2377 | TRUE, line_end); | |
252b5132 RH |
2378 | line_ptr += bytes_read; |
2379 | break; | |
2380 | case DW_LNS_set_file: | |
2381 | { | |
2382 | unsigned int file; | |
2383 | ||
e2f6d277 NC |
2384 | /* The file and directory tables are 0 |
2385 | based, the references are 1 based. */ | |
4265548c PA |
2386 | file = _bfd_safe_read_leb128 (abfd, line_ptr, &bytes_read, |
2387 | FALSE, line_end); | |
252b5132 | 2388 | line_ptr += bytes_read; |
af3ef9fe NC |
2389 | if (filename) |
2390 | free (filename); | |
252b5132 RH |
2391 | filename = concat_filename (table, file); |
2392 | break; | |
2393 | } | |
2394 | case DW_LNS_set_column: | |
4265548c PA |
2395 | column = _bfd_safe_read_leb128 (abfd, line_ptr, &bytes_read, |
2396 | FALSE, line_end); | |
252b5132 RH |
2397 | line_ptr += bytes_read; |
2398 | break; | |
2399 | case DW_LNS_negate_stmt: | |
2400 | is_stmt = (!is_stmt); | |
2401 | break; | |
2402 | case DW_LNS_set_basic_block: | |
252b5132 RH |
2403 | break; |
2404 | case DW_LNS_const_add_pc: | |
d8010d3e AM |
2405 | if (lh.line_range == 0) |
2406 | goto line_fail; | |
a233b20c | 2407 | if (lh.maximum_ops_per_insn == 1) |
a2a50954 AM |
2408 | address += (lh.minimum_instruction_length |
2409 | * ((255 - lh.opcode_base) / lh.line_range)); | |
a233b20c JJ |
2410 | else |
2411 | { | |
2412 | bfd_vma adjust = ((255 - lh.opcode_base) / lh.line_range); | |
a2a50954 AM |
2413 | address += (lh.minimum_instruction_length |
2414 | * ((op_index + adjust) | |
2415 | / lh.maximum_ops_per_insn)); | |
a233b20c JJ |
2416 | op_index = (op_index + adjust) % lh.maximum_ops_per_insn; |
2417 | } | |
252b5132 RH |
2418 | break; |
2419 | case DW_LNS_fixed_advance_pc: | |
dbb3fbbb | 2420 | address += read_2_bytes (abfd, line_ptr, line_end); |
a233b20c | 2421 | op_index = 0; |
252b5132 RH |
2422 | line_ptr += 2; |
2423 | break; | |
1a509dcc | 2424 | default: |
91d6fa6a NC |
2425 | /* Unknown standard opcode, ignore it. */ |
2426 | for (i = 0; i < lh.standard_opcode_lengths[op_code]; i++) | |
2427 | { | |
4265548c PA |
2428 | (void) _bfd_safe_read_leb128 (abfd, line_ptr, &bytes_read, |
2429 | FALSE, line_end); | |
91d6fa6a NC |
2430 | line_ptr += bytes_read; |
2431 | } | |
2432 | break; | |
252b5132 RH |
2433 | } |
2434 | } | |
5ed6aba4 | 2435 | |
af3ef9fe NC |
2436 | if (filename) |
2437 | free (filename); | |
252b5132 RH |
2438 | } |
2439 | ||
8af6b354 AM |
2440 | if (sort_line_sequences (table)) |
2441 | return table; | |
0ee19663 | 2442 | |
8af6b354 | 2443 | fail: |
a26a013f AM |
2444 | while (table->sequences != NULL) |
2445 | { | |
2446 | struct line_sequence* seq = table->sequences; | |
2447 | table->sequences = table->sequences->prev_sequence; | |
2448 | free (seq); | |
2449 | } | |
8af6b354 AM |
2450 | if (table->files != NULL) |
2451 | free (table->files); | |
2452 | if (table->dirs != NULL) | |
2453 | free (table->dirs); | |
2454 | return NULL; | |
252b5132 RH |
2455 | } |
2456 | ||
240d6706 NC |
2457 | /* If ADDR is within TABLE set the output parameters and return the |
2458 | range of addresses covered by the entry used to fill them out. | |
2459 | Otherwise set * FILENAME_PTR to NULL and return 0. | |
2460 | The parameters FILENAME_PTR, LINENUMBER_PTR and DISCRIMINATOR_PTR | |
2461 | are pointers to the objects to be filled in. */ | |
252b5132 | 2462 | |
240d6706 | 2463 | static bfd_vma |
818a27ac AM |
2464 | lookup_address_in_line_info_table (struct line_info_table *table, |
2465 | bfd_vma addr, | |
818a27ac | 2466 | const char **filename_ptr, |
9b8d1a36 CC |
2467 | unsigned int *linenumber_ptr, |
2468 | unsigned int *discriminator_ptr) | |
252b5132 | 2469 | { |
0ee19663 | 2470 | struct line_sequence *seq = NULL; |
089e3718 | 2471 | struct line_info *info; |
0ee19663 | 2472 | int low, high, mid; |
e82ce529 | 2473 | |
0ee19663 NC |
2474 | /* Binary search the array of sequences. */ |
2475 | low = 0; | |
2476 | high = table->num_sequences; | |
2477 | while (low < high) | |
2478 | { | |
2479 | mid = (low + high) / 2; | |
2480 | seq = &table->sequences[mid]; | |
2481 | if (addr < seq->low_pc) | |
2482 | high = mid; | |
2483 | else if (addr >= seq->last_line->address) | |
2484 | low = mid + 1; | |
2485 | else | |
2486 | break; | |
2487 | } | |
98591c73 | 2488 | |
089e3718 IT |
2489 | /* Check for a valid sequence. */ |
2490 | if (!seq || addr < seq->low_pc || addr >= seq->last_line->address) | |
2491 | goto fail; | |
2492 | ||
2493 | if (!build_line_info_table (table, seq)) | |
2494 | goto fail; | |
2495 | ||
2496 | /* Binary search the array of line information. */ | |
2497 | low = 0; | |
2498 | high = seq->num_lines; | |
2499 | info = NULL; | |
2500 | while (low < high) | |
1ee24f27 | 2501 | { |
089e3718 IT |
2502 | mid = (low + high) / 2; |
2503 | info = seq->line_info_lookup[mid]; | |
2504 | if (addr < info->address) | |
2505 | high = mid; | |
2506 | else if (addr >= seq->line_info_lookup[mid + 1]->address) | |
2507 | low = mid + 1; | |
2508 | else | |
2509 | break; | |
2510 | } | |
0ee19663 | 2511 | |
089e3718 IT |
2512 | /* Check for a valid line information entry. */ |
2513 | if (info | |
2514 | && addr >= info->address | |
2515 | && addr < seq->line_info_lookup[mid + 1]->address | |
2516 | && !(info->end_sequence || info == seq->last_line)) | |
2517 | { | |
2518 | *filename_ptr = info->filename; | |
2519 | *linenumber_ptr = info->line; | |
2520 | if (discriminator_ptr) | |
2521 | *discriminator_ptr = info->discriminator; | |
2522 | return seq->last_line->address - seq->low_pc; | |
1ee24f27 DJ |
2523 | } |
2524 | ||
089e3718 | 2525 | fail: |
107601c8 | 2526 | *filename_ptr = NULL; |
240d6706 | 2527 | return 0; |
252b5132 | 2528 | } |
98591c73 | 2529 | |
0ee19663 | 2530 | /* Read in the .debug_ranges section for future reference. */ |
a13afe8e FF |
2531 | |
2532 | static bfd_boolean | |
089e3718 | 2533 | read_debug_ranges (struct comp_unit * unit) |
a13afe8e | 2534 | { |
089e3718 IT |
2535 | struct dwarf2_debug * stash = unit->stash; |
2536 | ||
fc28f9aa | 2537 | return read_section (unit->abfd, &stash->debug_sections[debug_ranges], |
93ee1e36 | 2538 | stash->syms, 0, |
089e3718 IT |
2539 | &stash->dwarf_ranges_buffer, |
2540 | &stash->dwarf_ranges_size); | |
a13afe8e FF |
2541 | } |
2542 | ||
a092b084 | 2543 | /* Function table functions. */ |
252b5132 | 2544 | |
089e3718 IT |
2545 | static int |
2546 | compare_lookup_funcinfos (const void * a, const void * b) | |
2547 | { | |
2548 | const struct lookup_funcinfo * lookup1 = a; | |
2549 | const struct lookup_funcinfo * lookup2 = b; | |
2550 | ||
2551 | if (lookup1->low_addr < lookup2->low_addr) | |
2552 | return -1; | |
2553 | if (lookup1->low_addr > lookup2->low_addr) | |
2554 | return 1; | |
2555 | if (lookup1->high_addr < lookup2->high_addr) | |
2556 | return -1; | |
2557 | if (lookup1->high_addr > lookup2->high_addr) | |
2558 | return 1; | |
2559 | ||
2560 | return 0; | |
2561 | } | |
2562 | ||
2563 | static bfd_boolean | |
2564 | build_lookup_funcinfo_table (struct comp_unit * unit) | |
2565 | { | |
2566 | struct lookup_funcinfo *lookup_funcinfo_table = unit->lookup_funcinfo_table; | |
2567 | unsigned int number_of_functions = unit->number_of_functions; | |
2568 | struct funcinfo *each; | |
2569 | struct lookup_funcinfo *entry; | |
b6ddcd85 | 2570 | size_t func_index; |
089e3718 IT |
2571 | struct arange *range; |
2572 | bfd_vma low_addr, high_addr; | |
2573 | ||
2574 | if (lookup_funcinfo_table || number_of_functions == 0) | |
2575 | return TRUE; | |
2576 | ||
2577 | /* Create the function info lookup table. */ | |
2578 | lookup_funcinfo_table = (struct lookup_funcinfo *) | |
2579 | bfd_malloc (number_of_functions * sizeof (struct lookup_funcinfo)); | |
2580 | if (lookup_funcinfo_table == NULL) | |
2581 | return FALSE; | |
2582 | ||
2583 | /* Populate the function info lookup table. */ | |
b6ddcd85 | 2584 | func_index = number_of_functions; |
089e3718 IT |
2585 | for (each = unit->function_table; each; each = each->prev_func) |
2586 | { | |
b6ddcd85 | 2587 | entry = &lookup_funcinfo_table[--func_index]; |
089e3718 IT |
2588 | entry->funcinfo = each; |
2589 | ||
2590 | /* Calculate the lowest and highest address for this function entry. */ | |
2591 | low_addr = entry->funcinfo->arange.low; | |
2592 | high_addr = entry->funcinfo->arange.high; | |
2593 | ||
2594 | for (range = entry->funcinfo->arange.next; range; range = range->next) | |
2595 | { | |
2596 | if (range->low < low_addr) | |
2597 | low_addr = range->low; | |
2598 | if (range->high > high_addr) | |
2599 | high_addr = range->high; | |
2600 | } | |
2601 | ||
2602 | entry->low_addr = low_addr; | |
2603 | entry->high_addr = high_addr; | |
2604 | } | |
2605 | ||
b6ddcd85 | 2606 | BFD_ASSERT (func_index == 0); |
089e3718 IT |
2607 | |
2608 | /* Sort the function by address. */ | |
2609 | qsort (lookup_funcinfo_table, | |
2610 | number_of_functions, | |
2611 | sizeof (struct lookup_funcinfo), | |
2612 | compare_lookup_funcinfos); | |
2613 | ||
2614 | /* Calculate the high watermark for each function in the lookup table. */ | |
2615 | high_addr = lookup_funcinfo_table[0].high_addr; | |
b6ddcd85 | 2616 | for (func_index = 1; func_index < number_of_functions; func_index++) |
089e3718 | 2617 | { |
b6ddcd85 | 2618 | entry = &lookup_funcinfo_table[func_index]; |
089e3718 IT |
2619 | if (entry->high_addr > high_addr) |
2620 | high_addr = entry->high_addr; | |
2621 | else | |
2622 | entry->high_addr = high_addr; | |
2623 | } | |
2624 | ||
2625 | unit->lookup_funcinfo_table = lookup_funcinfo_table; | |
2626 | return TRUE; | |
2627 | } | |
2628 | ||
e00e8198 | 2629 | /* If ADDR is within UNIT's function tables, set FUNCTION_PTR, and return |
240d6706 NC |
2630 | TRUE. Note that we need to find the function that has the smallest range |
2631 | that contains ADDR, to handle inlined functions without depending upon | |
2632 | them being ordered in TABLE by increasing range. */ | |
252b5132 | 2633 | |
b34976b6 | 2634 | static bfd_boolean |
4ab527b0 | 2635 | lookup_address_in_function_table (struct comp_unit *unit, |
818a27ac | 2636 | bfd_vma addr, |
e00e8198 | 2637 | struct funcinfo **function_ptr) |
252b5132 | 2638 | { |
089e3718 IT |
2639 | unsigned int number_of_functions = unit->number_of_functions; |
2640 | struct lookup_funcinfo* lookup_funcinfo = NULL; | |
2641 | struct funcinfo* funcinfo = NULL; | |
a13afe8e | 2642 | struct funcinfo* best_fit = NULL; |
4ba3b326 | 2643 | bfd_vma best_fit_len = 0; |
089e3718 | 2644 | bfd_size_type low, high, mid, first; |
a13afe8e | 2645 | struct arange *arange; |
252b5132 | 2646 | |
cd6581da NC |
2647 | if (number_of_functions == 0) |
2648 | return FALSE; | |
2649 | ||
089e3718 IT |
2650 | if (!build_lookup_funcinfo_table (unit)) |
2651 | return FALSE; | |
2652 | ||
cd6581da NC |
2653 | if (unit->lookup_funcinfo_table[number_of_functions - 1].high_addr < addr) |
2654 | return FALSE; | |
07d6d2b8 | 2655 | |
089e3718 IT |
2656 | /* Find the first function in the lookup table which may contain the |
2657 | specified address. */ | |
2658 | low = 0; | |
2659 | high = number_of_functions; | |
2660 | first = high; | |
2661 | while (low < high) | |
252b5132 | 2662 | { |
089e3718 IT |
2663 | mid = (low + high) / 2; |
2664 | lookup_funcinfo = &unit->lookup_funcinfo_table[mid]; | |
2665 | if (addr < lookup_funcinfo->low_addr) | |
2666 | high = mid; | |
2667 | else if (addr >= lookup_funcinfo->high_addr) | |
2668 | low = mid + 1; | |
2669 | else | |
2670 | high = first = mid; | |
2671 | } | |
2672 | ||
2673 | /* Find the 'best' match for the address. The prior algorithm defined the | |
2674 | best match as the function with the smallest address range containing | |
2675 | the specified address. This definition should probably be changed to the | |
2676 | innermost inline routine containing the address, but right now we want | |
2677 | to get the same results we did before. */ | |
2678 | while (first < number_of_functions) | |
2679 | { | |
2680 | if (addr < unit->lookup_funcinfo_table[first].low_addr) | |
2681 | break; | |
2682 | funcinfo = unit->lookup_funcinfo_table[first].funcinfo; | |
2683 | ||
2684 | for (arange = &funcinfo->arange; arange; arange = arange->next) | |
252b5132 | 2685 | { |
089e3718 IT |
2686 | if (addr < arange->low || addr >= arange->high) |
2687 | continue; | |
2688 | ||
2689 | if (!best_fit | |
2690 | || arange->high - arange->low < best_fit_len | |
2691 | /* The following comparison is designed to return the same | |
2692 | match as the previous algorithm for routines which have the | |
2693 | same best fit length. */ | |
2694 | || (arange->high - arange->low == best_fit_len | |
2695 | && funcinfo > best_fit)) | |
a13afe8e | 2696 | { |
089e3718 IT |
2697 | best_fit = funcinfo; |
2698 | best_fit_len = arange->high - arange->low; | |
a13afe8e | 2699 | } |
252b5132 | 2700 | } |
98591c73 | 2701 | |
089e3718 | 2702 | first++; |
a13afe8e | 2703 | } |
089e3718 IT |
2704 | |
2705 | if (!best_fit) | |
2706 | return FALSE; | |
2707 | ||
2708 | *function_ptr = best_fit; | |
2709 | return TRUE; | |
252b5132 RH |
2710 | } |
2711 | ||
5420f73d L |
2712 | /* If SYM at ADDR is within function table of UNIT, set FILENAME_PTR |
2713 | and LINENUMBER_PTR, and return TRUE. */ | |
2714 | ||
2715 | static bfd_boolean | |
2716 | lookup_symbol_in_function_table (struct comp_unit *unit, | |
2717 | asymbol *sym, | |
2718 | bfd_vma addr, | |
2719 | const char **filename_ptr, | |
2720 | unsigned int *linenumber_ptr) | |
2721 | { | |
2722 | struct funcinfo* each_func; | |
2723 | struct funcinfo* best_fit = NULL; | |
4ba3b326 | 2724 | bfd_vma best_fit_len = 0; |
5420f73d L |
2725 | struct arange *arange; |
2726 | const char *name = bfd_asymbol_name (sym); | |
2727 | asection *sec = bfd_get_section (sym); | |
2728 | ||
2729 | for (each_func = unit->function_table; | |
2730 | each_func; | |
2731 | each_func = each_func->prev_func) | |
2732 | { | |
2733 | for (arange = &each_func->arange; | |
2734 | arange; | |
2735 | arange = arange->next) | |
2736 | { | |
2737 | if ((!each_func->sec || each_func->sec == sec) | |
2738 | && addr >= arange->low | |
2739 | && addr < arange->high | |
650f284e | 2740 | && each_func->name |
5420f73d L |
2741 | && strcmp (name, each_func->name) == 0 |
2742 | && (!best_fit | |
4ba3b326 TG |
2743 | || arange->high - arange->low < best_fit_len)) |
2744 | { | |
2745 | best_fit = each_func; | |
2746 | best_fit_len = arange->high - arange->low; | |
2747 | } | |
5420f73d L |
2748 | } |
2749 | } | |
2750 | ||
2751 | if (best_fit) | |
2752 | { | |
2753 | best_fit->sec = sec; | |
2754 | *filename_ptr = best_fit->file; | |
2755 | *linenumber_ptr = best_fit->line; | |
2756 | return TRUE; | |
2757 | } | |
2758 | else | |
2759 | return FALSE; | |
2760 | } | |
2761 | ||
2762 | /* Variable table functions. */ | |
2763 | ||
2764 | /* If SYM is within variable table of UNIT, set FILENAME_PTR and | |
2765 | LINENUMBER_PTR, and return TRUE. */ | |
2766 | ||
2767 | static bfd_boolean | |
2768 | lookup_symbol_in_variable_table (struct comp_unit *unit, | |
2769 | asymbol *sym, | |
5cf2e3f0 | 2770 | bfd_vma addr, |
5420f73d L |
2771 | const char **filename_ptr, |
2772 | unsigned int *linenumber_ptr) | |
2773 | { | |
2774 | const char *name = bfd_asymbol_name (sym); | |
2775 | asection *sec = bfd_get_section (sym); | |
2776 | struct varinfo* each; | |
2777 | ||
2778 | for (each = unit->variable_table; each; each = each->prev_var) | |
2779 | if (each->stack == 0 | |
5cf2e3f0 L |
2780 | && each->file != NULL |
2781 | && each->name != NULL | |
2782 | && each->addr == addr | |
5420f73d L |
2783 | && (!each->sec || each->sec == sec) |
2784 | && strcmp (name, each->name) == 0) | |
2785 | break; | |
2786 | ||
2787 | if (each) | |
2788 | { | |
2789 | each->sec = sec; | |
2790 | *filename_ptr = each->file; | |
2791 | *linenumber_ptr = each->line; | |
2792 | return TRUE; | |
2793 | } | |
089e3718 IT |
2794 | |
2795 | return FALSE; | |
5420f73d L |
2796 | } |
2797 | ||
52a93b95 | 2798 | static bfd_boolean |
422f3d3d PC |
2799 | find_abstract_instance (struct comp_unit * unit, |
2800 | bfd_byte * orig_info_ptr, | |
2801 | struct attribute * attr_ptr, | |
2802 | const char ** pname, | |
2803 | bfd_boolean * is_linkage, | |
2804 | char ** filename_ptr, | |
2805 | int * linenumber_ptr) | |
06f22d7e FF |
2806 | { |
2807 | bfd *abfd = unit->abfd; | |
f075ee0c | 2808 | bfd_byte *info_ptr; |
dbb3fbbb | 2809 | bfd_byte *info_ptr_end; |
06f22d7e FF |
2810 | unsigned int abbrev_number, bytes_read, i; |
2811 | struct abbrev_info *abbrev; | |
5609a71e | 2812 | bfd_uint64_t die_ref = attr_ptr->u.val; |
06f22d7e | 2813 | struct attribute attr; |
52a93b95 | 2814 | const char *name = NULL; |
06f22d7e | 2815 | |
5609a71e DJ |
2816 | /* DW_FORM_ref_addr can reference an entry in a different CU. It |
2817 | is an offset from the .debug_info section, not the current CU. */ | |
2818 | if (attr_ptr->form == DW_FORM_ref_addr) | |
2819 | { | |
2820 | /* We only support DW_FORM_ref_addr within the same file, so | |
1b86808a AM |
2821 | any relocations should be resolved already. Check this by |
2822 | testing for a zero die_ref; There can't be a valid reference | |
2823 | to the header of a .debug_info section. | |
2824 | DW_FORM_ref_addr is an offset relative to .debug_info. | |
2825 | Normally when using the GNU linker this is accomplished by | |
2826 | emitting a symbolic reference to a label, because .debug_info | |
2827 | sections are linked at zero. When there are multiple section | |
2828 | groups containing .debug_info, as there might be in a | |
2829 | relocatable object file, it would be reasonable to assume that | |
2830 | a symbolic reference to a label in any .debug_info section | |
2831 | might be used. Since we lay out multiple .debug_info | |
2832 | sections at non-zero VMAs (see place_sections), and read | |
2833 | them contiguously into stash->info_ptr_memory, that means | |
2834 | the reference is relative to stash->info_ptr_memory. */ | |
2835 | size_t total; | |
2836 | ||
2837 | info_ptr = unit->stash->info_ptr_memory; | |
2838 | info_ptr_end = unit->stash->info_ptr_end; | |
2839 | total = info_ptr_end - info_ptr; | |
2840 | if (!die_ref || die_ref >= total) | |
52a93b95 AM |
2841 | { |
2842 | _bfd_error_handler | |
9793eb77 | 2843 | (_("DWARF error: invalid abstract instance DIE ref")); |
52a93b95 AM |
2844 | bfd_set_error (bfd_error_bad_value); |
2845 | return FALSE; | |
2846 | } | |
1b86808a | 2847 | info_ptr += die_ref; |
0a9c7b2b NC |
2848 | |
2849 | /* Now find the CU containing this pointer. */ | |
2850 | if (info_ptr >= unit->info_ptr_unit && info_ptr < unit->end_ptr) | |
1b86808a | 2851 | info_ptr_end = unit->end_ptr; |
0a9c7b2b NC |
2852 | else |
2853 | { | |
2854 | /* Check other CUs to see if they contain the abbrev. */ | |
2855 | struct comp_unit * u; | |
2856 | ||
2857 | for (u = unit->prev_unit; u != NULL; u = u->prev_unit) | |
2858 | if (info_ptr >= u->info_ptr_unit && info_ptr < u->end_ptr) | |
2859 | break; | |
2860 | ||
2861 | if (u == NULL) | |
2862 | for (u = unit->next_unit; u != NULL; u = u->next_unit) | |
2863 | if (info_ptr >= u->info_ptr_unit && info_ptr < u->end_ptr) | |
2864 | break; | |
2865 | ||
2866 | if (u) | |
1b86808a AM |
2867 | { |
2868 | unit = u; | |
2869 | info_ptr_end = unit->end_ptr; | |
2870 | } | |
0a9c7b2b NC |
2871 | /* else FIXME: What do we do now ? */ |
2872 | } | |
5609a71e | 2873 | } |
95e34fb4 NC |
2874 | else if (attr_ptr->form == DW_FORM_GNU_ref_alt) |
2875 | { | |
2876 | info_ptr = read_alt_indirect_ref (unit, die_ref); | |
2877 | if (info_ptr == NULL) | |
2878 | { | |
4eca0228 | 2879 | _bfd_error_handler |
9793eb77 | 2880 | (_("DWARF error: unable to read alt ref %" PRIu64), |
8979927a | 2881 | (uint64_t) die_ref); |
95e34fb4 | 2882 | bfd_set_error (bfd_error_bad_value); |
52a93b95 | 2883 | return FALSE; |
95e34fb4 | 2884 | } |
52a93b95 AM |
2885 | info_ptr_end = (unit->stash->alt_dwarf_info_buffer |
2886 | + unit->stash->alt_dwarf_info_size); | |
dbb3fbbb | 2887 | |
0a9c7b2b NC |
2888 | /* FIXME: Do we need to locate the correct CU, in a similar |
2889 | fashion to the code in the DW_FORM_ref_addr case above ? */ | |
95e34fb4 | 2890 | } |
68ffbac6 | 2891 | else |
dbb3fbbb | 2892 | { |
1b86808a AM |
2893 | /* DW_FORM_ref1, DW_FORM_ref2, DW_FORM_ref4, DW_FORM_ref8 or |
2894 | DW_FORM_ref_udata. These are all references relative to the | |
2895 | start of the current CU. */ | |
2896 | size_t total; | |
2897 | ||
2898 | info_ptr = unit->info_ptr_unit; | |
dbb3fbbb | 2899 | info_ptr_end = unit->end_ptr; |
1b86808a AM |
2900 | total = info_ptr_end - info_ptr; |
2901 | if (!die_ref || die_ref >= total) | |
2902 | { | |
2903 | _bfd_error_handler | |
9793eb77 | 2904 | (_("DWARF error: invalid abstract instance DIE ref")); |
1b86808a AM |
2905 | bfd_set_error (bfd_error_bad_value); |
2906 | return FALSE; | |
2907 | } | |
2908 | info_ptr += die_ref; | |
dbb3fbbb | 2909 | } |
95e34fb4 | 2910 | |
4265548c PA |
2911 | abbrev_number = _bfd_safe_read_leb128 (abfd, info_ptr, &bytes_read, |
2912 | FALSE, info_ptr_end); | |
06f22d7e FF |
2913 | info_ptr += bytes_read; |
2914 | ||
2915 | if (abbrev_number) | |
2916 | { | |
2917 | abbrev = lookup_abbrev (abbrev_number, unit->abbrevs); | |
2918 | if (! abbrev) | |
2919 | { | |
4eca0228 | 2920 | _bfd_error_handler |
9793eb77 | 2921 | (_("DWARF error: could not find abbrev number %u"), abbrev_number); |
06f22d7e | 2922 | bfd_set_error (bfd_error_bad_value); |
52a93b95 | 2923 | return FALSE; |
06f22d7e FF |
2924 | } |
2925 | else | |
2926 | { | |
d5cbaa15 | 2927 | for (i = 0; i < abbrev->num_attrs; ++i) |
06f22d7e | 2928 | { |
8af6b354 | 2929 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, |
dbb3fbbb | 2930 | info_ptr, info_ptr_end); |
8af6b354 AM |
2931 | if (info_ptr == NULL) |
2932 | break; | |
52a93b95 AM |
2933 | /* It doesn't ever make sense for DW_AT_specification to |
2934 | refer to the same DIE. Stop simple recursion. */ | |
2935 | if (info_ptr == orig_info_ptr) | |
2936 | { | |
2937 | _bfd_error_handler | |
9793eb77 | 2938 | (_("DWARF error: abstract instance recursion detected")); |
52a93b95 AM |
2939 | bfd_set_error (bfd_error_bad_value); |
2940 | return FALSE; | |
2941 | } | |
26bf4e33 FF |
2942 | switch (attr.name) |
2943 | { | |
2944 | case DW_AT_name: | |
643be349 JJ |
2945 | /* Prefer DW_AT_MIPS_linkage_name or DW_AT_linkage_name |
2946 | over DW_AT_name. */ | |
60d77146 | 2947 | if (name == NULL && is_str_attr (attr.form)) |
e00e8198 AM |
2948 | { |
2949 | name = attr.u.str; | |
2950 | if (non_mangled (unit->lang)) | |
2951 | *is_linkage = TRUE; | |
2952 | } | |
26bf4e33 FF |
2953 | break; |
2954 | case DW_AT_specification: | |
422f3d3d PC |
2955 | if (!find_abstract_instance (unit, info_ptr, &attr, |
2956 | pname, is_linkage, | |
2957 | filename_ptr, linenumber_ptr)) | |
52a93b95 | 2958 | return FALSE; |
26bf4e33 | 2959 | break; |
643be349 | 2960 | case DW_AT_linkage_name: |
d5cbaa15 | 2961 | case DW_AT_MIPS_linkage_name: |
60d77146 NC |
2962 | /* PR 16949: Corrupt debug info can place |
2963 | non-string forms into these attributes. */ | |
6d74e8a1 | 2964 | if (is_str_attr (attr.form)) |
e00e8198 AM |
2965 | { |
2966 | name = attr.u.str; | |
2967 | *is_linkage = TRUE; | |
2968 | } | |
d5cbaa15 | 2969 | break; |
422f3d3d PC |
2970 | case DW_AT_decl_file: |
2971 | *filename_ptr = concat_filename (unit->line_table, | |
2972 | attr.u.val); | |
2973 | break; | |
2974 | case DW_AT_decl_line: | |
2975 | *linenumber_ptr = attr.u.val; | |
2976 | break; | |
26bf4e33 FF |
2977 | default: |
2978 | break; | |
2979 | } | |
06f22d7e FF |
2980 | } |
2981 | } | |
2982 | } | |
52a93b95 AM |
2983 | *pname = name; |
2984 | return TRUE; | |
06f22d7e FF |
2985 | } |
2986 | ||
8af6b354 AM |
2987 | static bfd_boolean |
2988 | read_rangelist (struct comp_unit *unit, struct arange *arange, | |
2989 | bfd_uint64_t offset) | |
a13afe8e FF |
2990 | { |
2991 | bfd_byte *ranges_ptr; | |
dbb3fbbb | 2992 | bfd_byte *ranges_end; |
a13afe8e FF |
2993 | bfd_vma base_address = unit->base_address; |
2994 | ||
2995 | if (! unit->stash->dwarf_ranges_buffer) | |
2996 | { | |
2997 | if (! read_debug_ranges (unit)) | |
8af6b354 | 2998 | return FALSE; |
a13afe8e | 2999 | } |
d8d1c398 | 3000 | |
dbb3fbbb NC |
3001 | ranges_ptr = unit->stash->dwarf_ranges_buffer + offset; |
3002 | if (ranges_ptr < unit->stash->dwarf_ranges_buffer) | |
3003 | return FALSE; | |
3004 | ranges_end = unit->stash->dwarf_ranges_buffer + unit->stash->dwarf_ranges_size; | |
62f8d217 | 3005 | |
a13afe8e FF |
3006 | for (;;) |
3007 | { | |
3008 | bfd_vma low_pc; | |
3009 | bfd_vma high_pc; | |
3010 | ||
dbb3fbbb | 3011 | /* PR 17512: file: 62cada7d. */ |
62f8d217 | 3012 | if (ranges_ptr + 2 * unit->addr_size > ranges_end) |
dbb3fbbb NC |
3013 | return FALSE; |
3014 | ||
3015 | low_pc = read_address (unit, ranges_ptr, ranges_end); | |
13d72a14 | 3016 | ranges_ptr += unit->addr_size; |
dbb3fbbb | 3017 | high_pc = read_address (unit, ranges_ptr, ranges_end); |
13d72a14 AN |
3018 | ranges_ptr += unit->addr_size; |
3019 | ||
a13afe8e FF |
3020 | if (low_pc == 0 && high_pc == 0) |
3021 | break; | |
3022 | if (low_pc == -1UL && high_pc != -1UL) | |
3023 | base_address = high_pc; | |
3024 | else | |
8af6b354 | 3025 | { |
a2a50954 | 3026 | if (!arange_add (unit, arange, |
8af6b354 AM |
3027 | base_address + low_pc, base_address + high_pc)) |
3028 | return FALSE; | |
3029 | } | |
a13afe8e | 3030 | } |
8af6b354 | 3031 | return TRUE; |
a13afe8e FF |
3032 | } |
3033 | ||
a092b084 | 3034 | /* DWARF2 Compilation unit functions. */ |
252b5132 RH |
3035 | |
3036 | /* Scan over each die in a comp. unit looking for functions to add | |
34b5e0b2 | 3037 | to the function table and variables to the variable table. */ |
252b5132 | 3038 | |
b34976b6 | 3039 | static bfd_boolean |
5420f73d | 3040 | scan_unit_for_symbols (struct comp_unit *unit) |
252b5132 RH |
3041 | { |
3042 | bfd *abfd = unit->abfd; | |
f075ee0c | 3043 | bfd_byte *info_ptr = unit->first_child_die_ptr; |
dbb3fbbb | 3044 | bfd_byte *info_ptr_end = unit->stash->info_ptr_end; |
52a93b95 AM |
3045 | int nesting_level = 0; |
3046 | struct nest_funcinfo { | |
3047 | struct funcinfo *func; | |
3048 | } *nested_funcs; | |
c955f9cd JW |
3049 | int nested_funcs_size; |
3050 | ||
3051 | /* Maintain a stack of in-scope functions and inlined functions, which we | |
3052 | can use to set the caller_func field. */ | |
3053 | nested_funcs_size = 32; | |
52a93b95 AM |
3054 | nested_funcs = (struct nest_funcinfo *) |
3055 | bfd_malloc (nested_funcs_size * sizeof (*nested_funcs)); | |
c955f9cd JW |
3056 | if (nested_funcs == NULL) |
3057 | return FALSE; | |
52a93b95 | 3058 | nested_funcs[nesting_level].func = 0; |
252b5132 | 3059 | |
52a93b95 | 3060 | while (nesting_level >= 0) |
252b5132 RH |
3061 | { |
3062 | unsigned int abbrev_number, bytes_read, i; | |
3063 | struct abbrev_info *abbrev; | |
3064 | struct attribute attr; | |
3065 | struct funcinfo *func; | |
5420f73d | 3066 | struct varinfo *var; |
a13afe8e FF |
3067 | bfd_vma low_pc = 0; |
3068 | bfd_vma high_pc = 0; | |
c49ead2f | 3069 | bfd_boolean high_pc_relative = FALSE; |
252b5132 | 3070 | |
877a8638 | 3071 | /* PR 17512: file: 9f405d9d. */ |
dbb3fbbb | 3072 | if (info_ptr >= info_ptr_end) |
877a8638 | 3073 | goto fail; |
62f8d217 | 3074 | |
4265548c PA |
3075 | abbrev_number = _bfd_safe_read_leb128 (abfd, info_ptr, &bytes_read, |
3076 | FALSE, info_ptr_end); | |
252b5132 RH |
3077 | info_ptr += bytes_read; |
3078 | ||
3079 | if (! abbrev_number) | |
3080 | { | |
3081 | nesting_level--; | |
3082 | continue; | |
3083 | } | |
98591c73 | 3084 | |
e643cb45 | 3085 | abbrev = lookup_abbrev (abbrev_number, unit->abbrevs); |
252b5132 RH |
3086 | if (! abbrev) |
3087 | { | |
e643cb45 NC |
3088 | static unsigned int previous_failed_abbrev = -1U; |
3089 | ||
3090 | /* Avoid multiple reports of the same missing abbrev. */ | |
3091 | if (abbrev_number != previous_failed_abbrev) | |
3092 | { | |
3093 | _bfd_error_handler | |
9793eb77 | 3094 | (_("DWARF error: could not find abbrev number %u"), |
e643cb45 NC |
3095 | abbrev_number); |
3096 | previous_failed_abbrev = abbrev_number; | |
3097 | } | |
252b5132 | 3098 | bfd_set_error (bfd_error_bad_value); |
8af6b354 | 3099 | goto fail; |
252b5132 | 3100 | } |
98591c73 | 3101 | |
5420f73d | 3102 | var = NULL; |
06f22d7e | 3103 | if (abbrev->tag == DW_TAG_subprogram |
5420f73d | 3104 | || abbrev->tag == DW_TAG_entry_point |
06f22d7e | 3105 | || abbrev->tag == DW_TAG_inlined_subroutine) |
252b5132 | 3106 | { |
dc810e39 | 3107 | bfd_size_type amt = sizeof (struct funcinfo); |
a50b1753 | 3108 | func = (struct funcinfo *) bfd_zalloc (abfd, amt); |
8af6b354 AM |
3109 | if (func == NULL) |
3110 | goto fail; | |
4ab527b0 | 3111 | func->tag = abbrev->tag; |
252b5132 RH |
3112 | func->prev_func = unit->function_table; |
3113 | unit->function_table = func; | |
e643cb45 | 3114 | unit->number_of_functions++; |
bd210d54 | 3115 | BFD_ASSERT (!unit->cached); |
c955f9cd JW |
3116 | |
3117 | if (func->tag == DW_TAG_inlined_subroutine) | |
52a93b95 AM |
3118 | for (i = nesting_level; i-- != 0; ) |
3119 | if (nested_funcs[i].func) | |
c955f9cd | 3120 | { |
52a93b95 | 3121 | func->caller_func = nested_funcs[i].func; |
c955f9cd JW |
3122 | break; |
3123 | } | |
52a93b95 | 3124 | nested_funcs[nesting_level].func = func; |
252b5132 RH |
3125 | } |
3126 | else | |
5420f73d L |
3127 | { |
3128 | func = NULL; | |
3129 | if (abbrev->tag == DW_TAG_variable) | |
3130 | { | |
3131 | bfd_size_type amt = sizeof (struct varinfo); | |
a50b1753 | 3132 | var = (struct varinfo *) bfd_zalloc (abfd, amt); |
8af6b354 AM |
3133 | if (var == NULL) |
3134 | goto fail; | |
5420f73d L |
3135 | var->tag = abbrev->tag; |
3136 | var->stack = 1; | |
3137 | var->prev_var = unit->variable_table; | |
3138 | unit->variable_table = var; | |
e643cb45 NC |
3139 | /* PR 18205: Missing debug information can cause this |
3140 | var to be attached to an already cached unit. */ | |
5420f73d | 3141 | } |
c955f9cd JW |
3142 | |
3143 | /* No inline function in scope at this nesting level. */ | |
52a93b95 | 3144 | nested_funcs[nesting_level].func = 0; |
5420f73d | 3145 | } |
98591c73 | 3146 | |
252b5132 RH |
3147 | for (i = 0; i < abbrev->num_attrs; ++i) |
3148 | { | |
52a93b95 AM |
3149 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], |
3150 | unit, info_ptr, info_ptr_end); | |
8af6b354 | 3151 | if (info_ptr == NULL) |
8ecc1f20 | 3152 | goto fail; |
98591c73 | 3153 | |
252b5132 RH |
3154 | if (func) |
3155 | { | |
3156 | switch (attr.name) | |
3157 | { | |
4ab527b0 | 3158 | case DW_AT_call_file: |
8af6b354 AM |
3159 | func->caller_file = concat_filename (unit->line_table, |
3160 | attr.u.val); | |
4ab527b0 FF |
3161 | break; |
3162 | ||
3163 | case DW_AT_call_line: | |
3164 | func->caller_line = attr.u.val; | |
3165 | break; | |
3166 | ||
06f22d7e | 3167 | case DW_AT_abstract_origin: |
5d8e6b4d | 3168 | case DW_AT_specification: |
422f3d3d PC |
3169 | if (!find_abstract_instance (unit, info_ptr, &attr, |
3170 | &func->name, | |
3171 | &func->is_linkage, | |
3172 | &func->file, | |
3173 | &func->line)) | |
52a93b95 | 3174 | goto fail; |
06f22d7e FF |
3175 | break; |
3176 | ||
252b5132 | 3177 | case DW_AT_name: |
643be349 JJ |
3178 | /* Prefer DW_AT_MIPS_linkage_name or DW_AT_linkage_name |
3179 | over DW_AT_name. */ | |
60d77146 | 3180 | if (func->name == NULL && is_str_attr (attr.form)) |
e00e8198 AM |
3181 | { |
3182 | func->name = attr.u.str; | |
3183 | if (non_mangled (unit->lang)) | |
3184 | func->is_linkage = TRUE; | |
3185 | } | |
252b5132 | 3186 | break; |
98591c73 | 3187 | |
643be349 | 3188 | case DW_AT_linkage_name: |
252b5132 | 3189 | case DW_AT_MIPS_linkage_name: |
60d77146 NC |
3190 | /* PR 16949: Corrupt debug info can place |
3191 | non-string forms into these attributes. */ | |
3192 | if (is_str_attr (attr.form)) | |
e00e8198 AM |
3193 | { |
3194 | func->name = attr.u.str; | |
3195 | func->is_linkage = TRUE; | |
3196 | } | |
252b5132 RH |
3197 | break; |
3198 | ||
3199 | case DW_AT_low_pc: | |
a13afe8e | 3200 | low_pc = attr.u.val; |
252b5132 RH |
3201 | break; |
3202 | ||
3203 | case DW_AT_high_pc: | |
a13afe8e | 3204 | high_pc = attr.u.val; |
c49ead2f | 3205 | high_pc_relative = attr.form != DW_FORM_addr; |
a13afe8e FF |
3206 | break; |
3207 | ||
3208 | case DW_AT_ranges: | |
8af6b354 AM |
3209 | if (!read_rangelist (unit, &func->arange, attr.u.val)) |
3210 | goto fail; | |
252b5132 RH |
3211 | break; |
3212 | ||
5420f73d L |
3213 | case DW_AT_decl_file: |
3214 | func->file = concat_filename (unit->line_table, | |
3215 | attr.u.val); | |
3216 | break; | |
3217 | ||
3218 | case DW_AT_decl_line: | |
3219 | func->line = attr.u.val; | |
3220 | break; | |
3221 | ||
3222 | default: | |
3223 | break; | |
3224 | } | |
3225 | } | |
3226 | else if (var) | |
3227 | { | |
3228 | switch (attr.name) | |
3229 | { | |
3230 | case DW_AT_name: | |
11855d8a AM |
3231 | if (is_str_attr (attr.form)) |
3232 | var->name = attr.u.str; | |
5420f73d L |
3233 | break; |
3234 | ||
3235 | case DW_AT_decl_file: | |
3236 | var->file = concat_filename (unit->line_table, | |
3237 | attr.u.val); | |
3238 | break; | |
3239 | ||
3240 | case DW_AT_decl_line: | |
3241 | var->line = attr.u.val; | |
3242 | break; | |
3243 | ||
3244 | case DW_AT_external: | |
3245 | if (attr.u.val != 0) | |
3246 | var->stack = 0; | |
3247 | break; | |
3248 | ||
3249 | case DW_AT_location: | |
5cf2e3f0 | 3250 | switch (attr.form) |
5420f73d | 3251 | { |
5cf2e3f0 L |
3252 | case DW_FORM_block: |
3253 | case DW_FORM_block1: | |
3254 | case DW_FORM_block2: | |
3255 | case DW_FORM_block4: | |
c07cbdd7 | 3256 | case DW_FORM_exprloc: |
0d76029f AM |
3257 | if (attr.u.blk->data != NULL |
3258 | && *attr.u.blk->data == DW_OP_addr) | |
5420f73d | 3259 | { |
5cf2e3f0 | 3260 | var->stack = 0; |
98b880f4 JW |
3261 | |
3262 | /* Verify that DW_OP_addr is the only opcode in the | |
3263 | location, in which case the block size will be 1 | |
3264 | plus the address size. */ | |
3265 | /* ??? For TLS variables, gcc can emit | |
3266 | DW_OP_addr <addr> DW_OP_GNU_push_tls_address | |
3267 | which we don't handle here yet. */ | |
3268 | if (attr.u.blk->size == unit->addr_size + 1U) | |
3269 | var->addr = bfd_get (unit->addr_size * 8, | |
3270 | unit->abfd, | |
3271 | attr.u.blk->data + 1); | |
5420f73d | 3272 | } |
5cf2e3f0 | 3273 | break; |
d8d1c398 | 3274 | |
5cf2e3f0 L |
3275 | default: |
3276 | break; | |
5420f73d L |
3277 | } |
3278 | break; | |
3279 | ||
252b5132 RH |
3280 | default: |
3281 | break; | |
3282 | } | |
3283 | } | |
3284 | } | |
3285 | ||
c49ead2f MW |
3286 | if (high_pc_relative) |
3287 | high_pc += low_pc; | |
3288 | ||
a13afe8e FF |
3289 | if (func && high_pc != 0) |
3290 | { | |
a2a50954 | 3291 | if (!arange_add (unit, &func->arange, low_pc, high_pc)) |
8af6b354 | 3292 | goto fail; |
a13afe8e FF |
3293 | } |
3294 | ||
252b5132 | 3295 | if (abbrev->has_children) |
c955f9cd JW |
3296 | { |
3297 | nesting_level++; | |
3298 | ||
3299 | if (nesting_level >= nested_funcs_size) | |
3300 | { | |
52a93b95 | 3301 | struct nest_funcinfo *tmp; |
c955f9cd JW |
3302 | |
3303 | nested_funcs_size *= 2; | |
52a93b95 | 3304 | tmp = (struct nest_funcinfo *) |
a2a50954 | 3305 | bfd_realloc (nested_funcs, |
52a93b95 | 3306 | nested_funcs_size * sizeof (*nested_funcs)); |
c955f9cd | 3307 | if (tmp == NULL) |
8af6b354 | 3308 | goto fail; |
c955f9cd JW |
3309 | nested_funcs = tmp; |
3310 | } | |
52a93b95 | 3311 | nested_funcs[nesting_level].func = 0; |
c955f9cd | 3312 | } |
252b5132 RH |
3313 | } |
3314 | ||
c955f9cd | 3315 | free (nested_funcs); |
b34976b6 | 3316 | return TRUE; |
8af6b354 AM |
3317 | |
3318 | fail: | |
3319 | free (nested_funcs); | |
3320 | return FALSE; | |
252b5132 RH |
3321 | } |
3322 | ||
5e38c3b8 MM |
3323 | /* Parse a DWARF2 compilation unit starting at INFO_PTR. This |
3324 | includes the compilation unit header that proceeds the DIE's, but | |
5c4491d3 | 3325 | does not include the length field that precedes each compilation |
5e38c3b8 | 3326 | unit header. END_PTR points one past the end of this comp unit. |
d03ba2a1 | 3327 | OFFSET_SIZE is the size of DWARF2 offsets (either 4 or 8 bytes). |
252b5132 RH |
3328 | |
3329 | This routine does not read the whole compilation unit; only enough | |
3330 | to get to the line number information for the compilation unit. */ | |
3331 | ||
3332 | static struct comp_unit * | |
0d161102 | 3333 | parse_comp_unit (struct dwarf2_debug *stash, |
818a27ac | 3334 | bfd_vma unit_length, |
f075ee0c | 3335 | bfd_byte *info_ptr_unit, |
818a27ac | 3336 | unsigned int offset_size) |
252b5132 RH |
3337 | { |
3338 | struct comp_unit* unit; | |
f46c2da6 | 3339 | unsigned int version; |
8ce8c090 | 3340 | bfd_uint64_t abbrev_offset = 0; |
0041f7df JK |
3341 | /* Initialize it just to avoid a GCC false warning. */ |
3342 | unsigned int addr_size = -1; | |
252b5132 | 3343 | struct abbrev_info** abbrevs; |
252b5132 RH |
3344 | unsigned int abbrev_number, bytes_read, i; |
3345 | struct abbrev_info *abbrev; | |
3346 | struct attribute attr; | |
f075ee0c AM |
3347 | bfd_byte *info_ptr = stash->info_ptr; |
3348 | bfd_byte *end_ptr = info_ptr + unit_length; | |
dc810e39 | 3349 | bfd_size_type amt; |
a13afe8e FF |
3350 | bfd_vma low_pc = 0; |
3351 | bfd_vma high_pc = 0; | |
a50b1753 | 3352 | bfd *abfd = stash->bfd_ptr; |
c49ead2f | 3353 | bfd_boolean high_pc_relative = FALSE; |
0041f7df | 3354 | enum dwarf_unit_type unit_type; |
3fde5a36 | 3355 | |
dbb3fbbb | 3356 | version = read_2_bytes (abfd, info_ptr, end_ptr); |
252b5132 | 3357 | info_ptr += 2; |
0041f7df | 3358 | if (version < 2 || version > 5) |
252b5132 | 3359 | { |
67f101ee NC |
3360 | /* PR 19872: A version number of 0 probably means that there is padding |
3361 | at the end of the .debug_info section. Gold puts it there when | |
3362 | performing an incremental link, for example. So do not generate | |
3363 | an error, just return a NULL. */ | |
3364 | if (version) | |
3365 | { | |
4eca0228 | 3366 | _bfd_error_handler |
9793eb77 AM |
3367 | (_("DWARF error: found dwarf version '%u', this reader" |
3368 | " only handles version 2, 3, 4 and 5 information"), version); | |
67f101ee NC |
3369 | bfd_set_error (bfd_error_bad_value); |
3370 | } | |
3371 | return NULL; | |
252b5132 RH |
3372 | } |
3373 | ||
0041f7df JK |
3374 | if (version < 5) |
3375 | unit_type = DW_UT_compile; | |
3376 | else | |
3377 | { | |
3378 | unit_type = read_1_byte (abfd, info_ptr, end_ptr); | |
3379 | info_ptr += 1; | |
3380 | ||
3381 | addr_size = read_1_byte (abfd, info_ptr, end_ptr); | |
3382 | info_ptr += 1; | |
3383 | } | |
3384 | ||
3385 | BFD_ASSERT (offset_size == 4 || offset_size == 8); | |
3386 | if (offset_size == 4) | |
3387 | abbrev_offset = read_4_bytes (abfd, info_ptr, end_ptr); | |
3388 | else | |
3389 | abbrev_offset = read_8_bytes (abfd, info_ptr, end_ptr); | |
3390 | info_ptr += offset_size; | |
3391 | ||
3392 | if (version < 5) | |
3393 | { | |
3394 | addr_size = read_1_byte (abfd, info_ptr, end_ptr); | |
3395 | info_ptr += 1; | |
3396 | } | |
3397 | ||
3398 | if (unit_type == DW_UT_type) | |
3399 | { | |
3400 | /* Skip type signature. */ | |
3401 | info_ptr += 8; | |
3402 | ||
3403 | /* Skip type offset. */ | |
3404 | info_ptr += offset_size; | |
3405 | } | |
3406 | ||
252b5132 RH |
3407 | if (addr_size > sizeof (bfd_vma)) |
3408 | { | |
4eca0228 | 3409 | _bfd_error_handler |
695344c0 | 3410 | /* xgettext: c-format */ |
9793eb77 AM |
3411 | (_("DWARF error: found address size '%u', this reader" |
3412 | " can not handle sizes greater than '%u'"), | |
a2a50954 AM |
3413 | addr_size, |
3414 | (unsigned int) sizeof (bfd_vma)); | |
252b5132 | 3415 | bfd_set_error (bfd_error_bad_value); |
67f101ee | 3416 | return NULL; |
252b5132 RH |
3417 | } |
3418 | ||
ecb651f0 | 3419 | if (addr_size != 2 && addr_size != 4 && addr_size != 8) |
252b5132 | 3420 | { |
4eca0228 | 3421 | _bfd_error_handler |
9793eb77 AM |
3422 | ("DWARF error: found address size '%u', this reader" |
3423 | " can only handle address sizes '2', '4' and '8'", addr_size); | |
252b5132 | 3424 | bfd_set_error (bfd_error_bad_value); |
67f101ee | 3425 | return NULL; |
252b5132 RH |
3426 | } |
3427 | ||
a092b084 | 3428 | /* Read the abbrevs for this compilation unit into a table. */ |
51db3708 | 3429 | abbrevs = read_abbrevs (abfd, abbrev_offset, stash); |
252b5132 | 3430 | if (! abbrevs) |
67f101ee | 3431 | return NULL; |
252b5132 | 3432 | |
4265548c PA |
3433 | abbrev_number = _bfd_safe_read_leb128 (abfd, info_ptr, &bytes_read, |
3434 | FALSE, end_ptr); | |
252b5132 RH |
3435 | info_ptr += bytes_read; |
3436 | if (! abbrev_number) | |
3437 | { | |
67f101ee NC |
3438 | /* PR 19872: An abbrev number of 0 probably means that there is padding |
3439 | at the end of the .debug_abbrev section. Gold puts it there when | |
3440 | performing an incremental link, for example. So do not generate | |
3441 | an error, just return a NULL. */ | |
3442 | return NULL; | |
252b5132 RH |
3443 | } |
3444 | ||
3445 | abbrev = lookup_abbrev (abbrev_number, abbrevs); | |
3446 | if (! abbrev) | |
3447 | { | |
9793eb77 | 3448 | _bfd_error_handler (_("DWARF error: could not find abbrev number %u"), |
4eca0228 | 3449 | abbrev_number); |
252b5132 | 3450 | bfd_set_error (bfd_error_bad_value); |
67f101ee | 3451 | return NULL; |
252b5132 | 3452 | } |
98591c73 | 3453 | |
dc810e39 | 3454 | amt = sizeof (struct comp_unit); |
a50b1753 | 3455 | unit = (struct comp_unit *) bfd_zalloc (abfd, amt); |
8af6b354 AM |
3456 | if (unit == NULL) |
3457 | return NULL; | |
252b5132 | 3458 | unit->abfd = abfd; |
5609a71e | 3459 | unit->version = version; |
98591c73 | 3460 | unit->addr_size = addr_size; |
d03ba2a1 | 3461 | unit->offset_size = offset_size; |
252b5132 RH |
3462 | unit->abbrevs = abbrevs; |
3463 | unit->end_ptr = end_ptr; | |
d03ba2a1 | 3464 | unit->stash = stash; |
c0c28ab8 | 3465 | unit->info_ptr_unit = info_ptr_unit; |
252b5132 RH |
3466 | |
3467 | for (i = 0; i < abbrev->num_attrs; ++i) | |
3468 | { | |
dbb3fbbb | 3469 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr, end_ptr); |
8af6b354 AM |
3470 | if (info_ptr == NULL) |
3471 | return NULL; | |
252b5132 RH |
3472 | |
3473 | /* Store the data if it is of an attribute we want to keep in a | |
3474 | partial symbol table. */ | |
3475 | switch (attr.name) | |
3476 | { | |
3477 | case DW_AT_stmt_list: | |
3478 | unit->stmtlist = 1; | |
482e2e37 | 3479 | unit->line_offset = attr.u.val; |
252b5132 RH |
3480 | break; |
3481 | ||
3482 | case DW_AT_name: | |
11855d8a AM |
3483 | if (is_str_attr (attr.form)) |
3484 | unit->name = attr.u.str; | |
252b5132 RH |
3485 | break; |
3486 | ||
3487 | case DW_AT_low_pc: | |
a13afe8e FF |
3488 | low_pc = attr.u.val; |
3489 | /* If the compilation unit DIE has a DW_AT_low_pc attribute, | |
3490 | this is the base address to use when reading location | |
089e3718 | 3491 | lists or range lists. */ |
a2a50954 AM |
3492 | if (abbrev->tag == DW_TAG_compile_unit) |
3493 | unit->base_address = low_pc; | |
252b5132 RH |
3494 | break; |
3495 | ||
3496 | case DW_AT_high_pc: | |
a13afe8e | 3497 | high_pc = attr.u.val; |
c49ead2f | 3498 | high_pc_relative = attr.form != DW_FORM_addr; |
a13afe8e FF |
3499 | break; |
3500 | ||
3501 | case DW_AT_ranges: | |
8af6b354 AM |
3502 | if (!read_rangelist (unit, &unit->arange, attr.u.val)) |
3503 | return NULL; | |
252b5132 RH |
3504 | break; |
3505 | ||
3506 | case DW_AT_comp_dir: | |
3507 | { | |
f075ee0c | 3508 | char *comp_dir = attr.u.str; |
877a8638 NC |
3509 | |
3510 | /* PR 17512: file: 1fe726be. */ | |
3511 | if (! is_str_attr (attr.form)) | |
3512 | { | |
4eca0228 | 3513 | _bfd_error_handler |
9793eb77 | 3514 | (_("DWARF error: DW_AT_comp_dir attribute encountered with a non-string form")); |
877a8638 NC |
3515 | comp_dir = NULL; |
3516 | } | |
3517 | ||
252b5132 RH |
3518 | if (comp_dir) |
3519 | { | |
3520 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
3521 | directory, get rid of it. */ | |
818a27ac | 3522 | char *cp = strchr (comp_dir, ':'); |
252b5132 RH |
3523 | |
3524 | if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/') | |
3525 | comp_dir = cp + 1; | |
3526 | } | |
3527 | unit->comp_dir = comp_dir; | |
3528 | break; | |
3529 | } | |
3530 | ||
e00e8198 AM |
3531 | case DW_AT_language: |
3532 | unit->lang = attr.u.val; | |
3533 | break; | |
3534 | ||
252b5132 RH |
3535 | default: |
3536 | break; | |
3537 | } | |
3538 | } | |
c49ead2f MW |
3539 | if (high_pc_relative) |
3540 | high_pc += low_pc; | |
a13afe8e | 3541 | if (high_pc != 0) |
709d67f1 | 3542 | { |
a2a50954 | 3543 | if (!arange_add (unit, &unit->arange, low_pc, high_pc)) |
8af6b354 | 3544 | return NULL; |
709d67f1 | 3545 | } |
252b5132 RH |
3546 | |
3547 | unit->first_child_die_ptr = info_ptr; | |
3548 | return unit; | |
3549 | } | |
3550 | ||
6dd55cb7 L |
3551 | /* Return TRUE if UNIT may contain the address given by ADDR. When |
3552 | there are functions written entirely with inline asm statements, the | |
3553 | range info in the compilation unit header may not be correct. We | |
3554 | need to consult the line info table to see if a compilation unit | |
3555 | really contains the given address. */ | |
252b5132 | 3556 | |
b34976b6 | 3557 | static bfd_boolean |
818a27ac | 3558 | comp_unit_contains_address (struct comp_unit *unit, bfd_vma addr) |
252b5132 | 3559 | { |
709d67f1 AM |
3560 | struct arange *arange; |
3561 | ||
3562 | if (unit->error) | |
3563 | return FALSE; | |
3564 | ||
3565 | arange = &unit->arange; | |
3566 | do | |
3567 | { | |
3568 | if (addr >= arange->low && addr < arange->high) | |
3569 | return TRUE; | |
3570 | arange = arange->next; | |
3571 | } | |
3572 | while (arange); | |
3573 | ||
3574 | return FALSE; | |
252b5132 RH |
3575 | } |
3576 | ||
252b5132 RH |
3577 | /* If UNIT contains ADDR, set the output parameters to the values for |
3578 | the line containing ADDR. The output parameters, FILENAME_PTR, | |
e00e8198 | 3579 | FUNCTION_PTR, and LINENUMBER_PTR, are pointers to the objects |
98591c73 | 3580 | to be filled in. |
252b5132 | 3581 | |
240d6706 NC |
3582 | Returns the range of addresses covered by the entry that was used |
3583 | to fill in *LINENUMBER_PTR or 0 if it was not filled in. */ | |
252b5132 | 3584 | |
240d6706 | 3585 | static bfd_vma |
818a27ac AM |
3586 | comp_unit_find_nearest_line (struct comp_unit *unit, |
3587 | bfd_vma addr, | |
3588 | const char **filename_ptr, | |
e00e8198 | 3589 | struct funcinfo **function_ptr, |
818a27ac | 3590 | unsigned int *linenumber_ptr, |
9b8d1a36 | 3591 | unsigned int *discriminator_ptr, |
818a27ac | 3592 | struct dwarf2_debug *stash) |
252b5132 | 3593 | { |
b34976b6 | 3594 | bfd_boolean func_p; |
98591c73 | 3595 | |
252b5132 | 3596 | if (unit->error) |
b34976b6 | 3597 | return FALSE; |
252b5132 RH |
3598 | |
3599 | if (! unit->line_table) | |
3600 | { | |
3601 | if (! unit->stmtlist) | |
3602 | { | |
3603 | unit->error = 1; | |
b34976b6 | 3604 | return FALSE; |
252b5132 | 3605 | } |
98591c73 | 3606 | |
51db3708 | 3607 | unit->line_table = decode_line_info (unit, stash); |
252b5132 RH |
3608 | |
3609 | if (! unit->line_table) | |
3610 | { | |
3611 | unit->error = 1; | |
b34976b6 | 3612 | return FALSE; |
252b5132 | 3613 | } |
98591c73 | 3614 | |
3f5864e1 | 3615 | if (unit->first_child_die_ptr < unit->end_ptr |
5420f73d | 3616 | && ! scan_unit_for_symbols (unit)) |
252b5132 RH |
3617 | { |
3618 | unit->error = 1; | |
b34976b6 | 3619 | return FALSE; |
252b5132 RH |
3620 | } |
3621 | } | |
3622 | ||
e00e8198 AM |
3623 | *function_ptr = NULL; |
3624 | func_p = lookup_address_in_function_table (unit, addr, function_ptr); | |
3625 | if (func_p && (*function_ptr)->tag == DW_TAG_inlined_subroutine) | |
3626 | stash->inliner_chain = *function_ptr; | |
240d6706 NC |
3627 | |
3628 | return lookup_address_in_line_info_table (unit->line_table, addr, | |
3629 | filename_ptr, | |
3630 | linenumber_ptr, | |
3631 | discriminator_ptr); | |
252b5132 RH |
3632 | } |
3633 | ||
bd210d54 NC |
3634 | /* Check to see if line info is already decoded in a comp_unit. |
3635 | If not, decode it. Returns TRUE if no errors were encountered; | |
5420f73d L |
3636 | FALSE otherwise. */ |
3637 | ||
3638 | static bfd_boolean | |
bd210d54 NC |
3639 | comp_unit_maybe_decode_line_info (struct comp_unit *unit, |
3640 | struct dwarf2_debug *stash) | |
5420f73d L |
3641 | { |
3642 | if (unit->error) | |
3643 | return FALSE; | |
3644 | ||
3645 | if (! unit->line_table) | |
3646 | { | |
3647 | if (! unit->stmtlist) | |
3648 | { | |
3649 | unit->error = 1; | |
3650 | return FALSE; | |
3651 | } | |
3652 | ||
3653 | unit->line_table = decode_line_info (unit, stash); | |
3654 | ||
3655 | if (! unit->line_table) | |
3656 | { | |
3657 | unit->error = 1; | |
3658 | return FALSE; | |
3659 | } | |
3660 | ||
3661 | if (unit->first_child_die_ptr < unit->end_ptr | |
3662 | && ! scan_unit_for_symbols (unit)) | |
3663 | { | |
3664 | unit->error = 1; | |
3665 | return FALSE; | |
3666 | } | |
3667 | } | |
3668 | ||
bd210d54 NC |
3669 | return TRUE; |
3670 | } | |
3671 | ||
3672 | /* If UNIT contains SYM at ADDR, set the output parameters to the | |
3673 | values for the line containing SYM. The output parameters, | |
3674 | FILENAME_PTR, and LINENUMBER_PTR, are pointers to the objects to be | |
3675 | filled in. | |
3676 | ||
3677 | Return TRUE if UNIT contains SYM, and no errors were encountered; | |
3678 | FALSE otherwise. */ | |
3679 | ||
3680 | static bfd_boolean | |
3681 | comp_unit_find_line (struct comp_unit *unit, | |
3682 | asymbol *sym, | |
3683 | bfd_vma addr, | |
3684 | const char **filename_ptr, | |
3685 | unsigned int *linenumber_ptr, | |
3686 | struct dwarf2_debug *stash) | |
3687 | { | |
3688 | if (!comp_unit_maybe_decode_line_info (unit, stash)) | |
3689 | return FALSE; | |
3690 | ||
5420f73d L |
3691 | if (sym->flags & BSF_FUNCTION) |
3692 | return lookup_symbol_in_function_table (unit, sym, addr, | |
3693 | filename_ptr, | |
3694 | linenumber_ptr); | |
bd210d54 NC |
3695 | |
3696 | return lookup_symbol_in_variable_table (unit, sym, addr, | |
3697 | filename_ptr, | |
3698 | linenumber_ptr); | |
3699 | } | |
3700 | ||
3701 | static struct funcinfo * | |
3702 | reverse_funcinfo_list (struct funcinfo *head) | |
3703 | { | |
3704 | struct funcinfo *rhead; | |
3705 | struct funcinfo *temp; | |
3706 | ||
3707 | for (rhead = NULL; head; head = temp) | |
3708 | { | |
3709 | temp = head->prev_func; | |
3710 | head->prev_func = rhead; | |
3711 | rhead = head; | |
3712 | } | |
3713 | return rhead; | |
3714 | } | |
3715 | ||
3716 | static struct varinfo * | |
3717 | reverse_varinfo_list (struct varinfo *head) | |
3718 | { | |
3719 | struct varinfo *rhead; | |
3720 | struct varinfo *temp; | |
3721 | ||
3722 | for (rhead = NULL; head; head = temp) | |
3723 | { | |
3724 | temp = head->prev_var; | |
3725 | head->prev_var = rhead; | |
3726 | rhead = head; | |
3727 | } | |
3728 | return rhead; | |
3729 | } | |
3730 | ||
3731 | /* Extract all interesting funcinfos and varinfos of a compilation | |
3732 | unit into hash tables for faster lookup. Returns TRUE if no | |
3733 | errors were enountered; FALSE otherwise. */ | |
3734 | ||
3735 | static bfd_boolean | |
3736 | comp_unit_hash_info (struct dwarf2_debug *stash, | |
3737 | struct comp_unit *unit, | |
3738 | struct info_hash_table *funcinfo_hash_table, | |
3739 | struct info_hash_table *varinfo_hash_table) | |
3740 | { | |
3741 | struct funcinfo* each_func; | |
3742 | struct varinfo* each_var; | |
3743 | bfd_boolean okay = TRUE; | |
3744 | ||
3745 | BFD_ASSERT (stash->info_hash_status != STASH_INFO_HASH_DISABLED); | |
3746 | ||
3747 | if (!comp_unit_maybe_decode_line_info (unit, stash)) | |
3748 | return FALSE; | |
3749 | ||
3750 | BFD_ASSERT (!unit->cached); | |
3751 | ||
3752 | /* To preserve the original search order, we went to visit the function | |
3753 | infos in the reversed order of the list. However, making the list | |
3754 | bi-directional use quite a bit of extra memory. So we reverse | |
3755 | the list first, traverse the list in the now reversed order and | |
3756 | finally reverse the list again to get back the original order. */ | |
3757 | unit->function_table = reverse_funcinfo_list (unit->function_table); | |
3758 | for (each_func = unit->function_table; | |
3759 | each_func && okay; | |
3760 | each_func = each_func->prev_func) | |
3761 | { | |
089e3718 | 3762 | /* Skip nameless functions. */ |
bd210d54 NC |
3763 | if (each_func->name) |
3764 | /* There is no need to copy name string into hash table as | |
3765 | name string is either in the dwarf string buffer or | |
3766 | info in the stash. */ | |
3767 | okay = insert_info_hash_table (funcinfo_hash_table, each_func->name, | |
3768 | (void*) each_func, FALSE); | |
3769 | } | |
3770 | unit->function_table = reverse_funcinfo_list (unit->function_table); | |
3771 | if (!okay) | |
3772 | return FALSE; | |
3773 | ||
3774 | /* We do the same for variable infos. */ | |
3775 | unit->variable_table = reverse_varinfo_list (unit->variable_table); | |
3776 | for (each_var = unit->variable_table; | |
3777 | each_var && okay; | |
3778 | each_var = each_var->prev_var) | |
3779 | { | |
3780 | /* Skip stack vars and vars with no files or names. */ | |
3781 | if (each_var->stack == 0 | |
3782 | && each_var->file != NULL | |
3783 | && each_var->name != NULL) | |
3784 | /* There is no need to copy name string into hash table as | |
3785 | name string is either in the dwarf string buffer or | |
3786 | info in the stash. */ | |
3787 | okay = insert_info_hash_table (varinfo_hash_table, each_var->name, | |
3788 | (void*) each_var, FALSE); | |
3789 | } | |
3790 | ||
3791 | unit->variable_table = reverse_varinfo_list (unit->variable_table); | |
3792 | unit->cached = TRUE; | |
3793 | return okay; | |
5420f73d L |
3794 | } |
3795 | ||
e2f6d277 NC |
3796 | /* Locate a section in a BFD containing debugging info. The search starts |
3797 | from the section after AFTER_SEC, or from the first section in the BFD if | |
3798 | AFTER_SEC is NULL. The search works by examining the names of the | |
fc28f9aa TG |
3799 | sections. There are three permissiable names. The first two are given |
3800 | by DEBUG_SECTIONS[debug_info] (whose standard DWARF2 names are .debug_info | |
3801 | and .zdebug_info). The third is a prefix .gnu.linkonce.wi. | |
e2f6d277 NC |
3802 | This is a variation on the .debug_info section which has a checksum |
3803 | describing the contents appended onto the name. This allows the linker to | |
3804 | identify and discard duplicate debugging sections for different | |
3805 | compilation units. */ | |
a092b084 NC |
3806 | #define GNU_LINKONCE_INFO ".gnu.linkonce.wi." |
3807 | ||
3808 | static asection * | |
fc28f9aa | 3809 | find_debug_info (bfd *abfd, const struct dwarf_debug_section *debug_sections, |
93ee1e36 | 3810 | asection *after_sec) |
a092b084 | 3811 | { |
a2a50954 AM |
3812 | asection *msec; |
3813 | const char *look; | |
3814 | ||
3815 | if (after_sec == NULL) | |
3816 | { | |
3817 | look = debug_sections[debug_info].uncompressed_name; | |
3818 | msec = bfd_get_section_by_name (abfd, look); | |
3819 | if (msec != NULL) | |
3820 | return msec; | |
a092b084 | 3821 | |
a2a50954 AM |
3822 | look = debug_sections[debug_info].compressed_name; |
3823 | if (look != NULL) | |
3824 | { | |
3825 | msec = bfd_get_section_by_name (abfd, look); | |
3826 | if (msec != NULL) | |
3827 | return msec; | |
3828 | } | |
a092b084 | 3829 | |
a2a50954 AM |
3830 | for (msec = abfd->sections; msec != NULL; msec = msec->next) |
3831 | if (CONST_STRNEQ (msec->name, GNU_LINKONCE_INFO)) | |
3832 | return msec; | |
3833 | ||
3834 | return NULL; | |
3835 | } | |
3836 | ||
3837 | for (msec = after_sec->next; msec != NULL; msec = msec->next) | |
a092b084 | 3838 | { |
a2a50954 AM |
3839 | look = debug_sections[debug_info].uncompressed_name; |
3840 | if (strcmp (msec->name, look) == 0) | |
a092b084 NC |
3841 | return msec; |
3842 | ||
a2a50954 AM |
3843 | look = debug_sections[debug_info].compressed_name; |
3844 | if (look != NULL && strcmp (msec->name, look) == 0) | |
1b315056 CS |
3845 | return msec; |
3846 | ||
0112cd26 | 3847 | if (CONST_STRNEQ (msec->name, GNU_LINKONCE_INFO)) |
a092b084 | 3848 | return msec; |
a092b084 NC |
3849 | } |
3850 | ||
3851 | return NULL; | |
3852 | } | |
3853 | ||
93ee1e36 AM |
3854 | /* Transfer VMAs from object file to separate debug file. */ |
3855 | ||
3856 | static void | |
3857 | set_debug_vma (bfd *orig_bfd, bfd *debug_bfd) | |
3858 | { | |
3859 | asection *s, *d; | |
3860 | ||
3861 | for (s = orig_bfd->sections, d = debug_bfd->sections; | |
3862 | s != NULL && d != NULL; | |
3863 | s = s->next, d = d->next) | |
3864 | { | |
3865 | if ((d->flags & SEC_DEBUGGING) != 0) | |
3866 | break; | |
3867 | /* ??? Assumes 1-1 correspondence between sections in the | |
3868 | two files. */ | |
3869 | if (strcmp (s->name, d->name) == 0) | |
3870 | { | |
3871 | d->output_section = s->output_section; | |
3872 | d->output_offset = s->output_offset; | |
3873 | d->vma = s->vma; | |
3874 | } | |
3875 | } | |
3876 | } | |
3877 | ||
5609a71e | 3878 | /* Unset vmas for adjusted sections in STASH. */ |
d4c32a81 L |
3879 | |
3880 | static void | |
3881 | unset_sections (struct dwarf2_debug *stash) | |
3882 | { | |
93ee1e36 | 3883 | int i; |
5609a71e | 3884 | struct adjusted_section *p; |
d4c32a81 | 3885 | |
5609a71e DJ |
3886 | i = stash->adjusted_section_count; |
3887 | p = stash->adjusted_sections; | |
d4c32a81 L |
3888 | for (; i > 0; i--, p++) |
3889 | p->section->vma = 0; | |
3890 | } | |
3891 | ||
93ee1e36 AM |
3892 | /* Set VMAs for allocated and .debug_info sections in ORIG_BFD, a |
3893 | relocatable object file. VMAs are normally all zero in relocatable | |
3894 | object files, so if we want to distinguish locations in sections by | |
3895 | address we need to set VMAs so the sections do not overlap. We | |
3896 | also set VMA on .debug_info so that when we have multiple | |
3897 | .debug_info sections (or the linkonce variant) they also do not | |
3898 | overlap. The multiple .debug_info sections make up a single | |
3899 | logical section. ??? We should probably do the same for other | |
3900 | debug sections. */ | |
35ccda9e L |
3901 | |
3902 | static bfd_boolean | |
93ee1e36 | 3903 | place_sections (bfd *orig_bfd, struct dwarf2_debug *stash) |
35ccda9e | 3904 | { |
93ee1e36 | 3905 | bfd *abfd; |
5609a71e | 3906 | struct adjusted_section *p; |
93ee1e36 AM |
3907 | int i; |
3908 | const char *debug_info_name; | |
d4c32a81 | 3909 | |
5609a71e | 3910 | if (stash->adjusted_section_count != 0) |
35ccda9e | 3911 | { |
5609a71e DJ |
3912 | i = stash->adjusted_section_count; |
3913 | p = stash->adjusted_sections; | |
d4c32a81 L |
3914 | for (; i > 0; i--, p++) |
3915 | p->section->vma = p->adj_vma; | |
93ee1e36 | 3916 | return TRUE; |
d4c32a81 | 3917 | } |
93ee1e36 AM |
3918 | |
3919 | debug_info_name = stash->debug_sections[debug_info].uncompressed_name; | |
3920 | i = 0; | |
3921 | abfd = orig_bfd; | |
3922 | while (1) | |
d4c32a81 L |
3923 | { |
3924 | asection *sect; | |
35ccda9e | 3925 | |
d4c32a81 | 3926 | for (sect = abfd->sections; sect != NULL; sect = sect->next) |
35ccda9e | 3927 | { |
5609a71e DJ |
3928 | int is_debug_info; |
3929 | ||
cd0449ab | 3930 | if ((sect->output_section != NULL |
93ee1e36 AM |
3931 | && sect->output_section != sect |
3932 | && (sect->flags & SEC_DEBUGGING) == 0) | |
cd0449ab | 3933 | || sect->vma != 0) |
5609a71e DJ |
3934 | continue; |
3935 | ||
93ee1e36 AM |
3936 | is_debug_info = (strcmp (sect->name, debug_info_name) == 0 |
3937 | || CONST_STRNEQ (sect->name, GNU_LINKONCE_INFO)); | |
d4c32a81 | 3938 | |
93ee1e36 AM |
3939 | if (!((sect->flags & SEC_ALLOC) != 0 && abfd == orig_bfd) |
3940 | && !is_debug_info) | |
d4c32a81 L |
3941 | continue; |
3942 | ||
3943 | i++; | |
3944 | } | |
93ee1e36 AM |
3945 | if (abfd == stash->bfd_ptr) |
3946 | break; | |
3947 | abfd = stash->bfd_ptr; | |
3948 | } | |
3949 | ||
3950 | if (i <= 1) | |
3951 | stash->adjusted_section_count = -1; | |
3952 | else | |
3953 | { | |
3954 | bfd_vma last_vma = 0, last_dwarf = 0; | |
3955 | bfd_size_type amt = i * sizeof (struct adjusted_section); | |
d4c32a81 | 3956 | |
93ee1e36 AM |
3957 | p = (struct adjusted_section *) bfd_malloc (amt); |
3958 | if (p == NULL) | |
d4c32a81 L |
3959 | return FALSE; |
3960 | ||
5609a71e DJ |
3961 | stash->adjusted_sections = p; |
3962 | stash->adjusted_section_count = i; | |
d4c32a81 | 3963 | |
93ee1e36 AM |
3964 | abfd = orig_bfd; |
3965 | while (1) | |
d4c32a81 | 3966 | { |
93ee1e36 | 3967 | asection *sect; |
d4c32a81 | 3968 | |
93ee1e36 AM |
3969 | for (sect = abfd->sections; sect != NULL; sect = sect->next) |
3970 | { | |
3971 | bfd_size_type sz; | |
3972 | int is_debug_info; | |
5609a71e | 3973 | |
93ee1e36 AM |
3974 | if ((sect->output_section != NULL |
3975 | && sect->output_section != sect | |
3976 | && (sect->flags & SEC_DEBUGGING) == 0) | |
3977 | || sect->vma != 0) | |
3978 | continue; | |
5609a71e | 3979 | |
93ee1e36 AM |
3980 | is_debug_info = (strcmp (sect->name, debug_info_name) == 0 |
3981 | || CONST_STRNEQ (sect->name, GNU_LINKONCE_INFO)); | |
d4c32a81 | 3982 | |
93ee1e36 AM |
3983 | if (!((sect->flags & SEC_ALLOC) != 0 && abfd == orig_bfd) |
3984 | && !is_debug_info) | |
3985 | continue; | |
d4c32a81 | 3986 | |
93ee1e36 | 3987 | sz = sect->rawsize ? sect->rawsize : sect->size; |
5609a71e | 3988 | |
93ee1e36 AM |
3989 | if (is_debug_info) |
3990 | { | |
3991 | BFD_ASSERT (sect->alignment_power == 0); | |
3992 | sect->vma = last_dwarf; | |
3993 | last_dwarf += sz; | |
3994 | } | |
3995 | else | |
3996 | { | |
3997 | /* Align the new address to the current section | |
3998 | alignment. */ | |
3999 | last_vma = ((last_vma | |
29f628db DV |
4000 | + ~(-((bfd_vma) 1 << sect->alignment_power))) |
4001 | & (-((bfd_vma) 1 << sect->alignment_power))); | |
93ee1e36 AM |
4002 | sect->vma = last_vma; |
4003 | last_vma += sz; | |
4004 | } | |
d4c32a81 | 4005 | |
93ee1e36 AM |
4006 | p->section = sect; |
4007 | p->adj_vma = sect->vma; | |
4008 | p++; | |
4009 | } | |
4010 | if (abfd == stash->bfd_ptr) | |
4011 | break; | |
4012 | abfd = stash->bfd_ptr; | |
35ccda9e L |
4013 | } |
4014 | } | |
4015 | ||
93ee1e36 AM |
4016 | if (orig_bfd != stash->bfd_ptr) |
4017 | set_debug_vma (orig_bfd, stash->bfd_ptr); | |
4018 | ||
35ccda9e L |
4019 | return TRUE; |
4020 | } | |
4021 | ||
bd210d54 NC |
4022 | /* Look up a funcinfo by name using the given info hash table. If found, |
4023 | also update the locations pointed to by filename_ptr and linenumber_ptr. | |
4024 | ||
4025 | This function returns TRUE if a funcinfo that matches the given symbol | |
4026 | and address is found with any error; otherwise it returns FALSE. */ | |
4027 | ||
4028 | static bfd_boolean | |
4029 | info_hash_lookup_funcinfo (struct info_hash_table *hash_table, | |
4030 | asymbol *sym, | |
4031 | bfd_vma addr, | |
4032 | const char **filename_ptr, | |
4033 | unsigned int *linenumber_ptr) | |
4034 | { | |
4035 | struct funcinfo* each_func; | |
4036 | struct funcinfo* best_fit = NULL; | |
4ba3b326 | 4037 | bfd_vma best_fit_len = 0; |
bd210d54 NC |
4038 | struct info_list_node *node; |
4039 | struct arange *arange; | |
4040 | const char *name = bfd_asymbol_name (sym); | |
4041 | asection *sec = bfd_get_section (sym); | |
4042 | ||
4043 | for (node = lookup_info_hash_table (hash_table, name); | |
4044 | node; | |
4045 | node = node->next) | |
4046 | { | |
a50b1753 | 4047 | each_func = (struct funcinfo *) node->info; |
bd210d54 NC |
4048 | for (arange = &each_func->arange; |
4049 | arange; | |
4050 | arange = arange->next) | |
4051 | { | |
4052 | if ((!each_func->sec || each_func->sec == sec) | |
4053 | && addr >= arange->low | |
4054 | && addr < arange->high | |
4055 | && (!best_fit | |
4ba3b326 TG |
4056 | || arange->high - arange->low < best_fit_len)) |
4057 | { | |
4058 | best_fit = each_func; | |
4059 | best_fit_len = arange->high - arange->low; | |
4060 | } | |
bd210d54 NC |
4061 | } |
4062 | } | |
4063 | ||
4064 | if (best_fit) | |
4065 | { | |
4066 | best_fit->sec = sec; | |
4067 | *filename_ptr = best_fit->file; | |
4068 | *linenumber_ptr = best_fit->line; | |
4069 | return TRUE; | |
4070 | } | |
4071 | ||
4072 | return FALSE; | |
4073 | } | |
4074 | ||
4075 | /* Look up a varinfo by name using the given info hash table. If found, | |
4076 | also update the locations pointed to by filename_ptr and linenumber_ptr. | |
4077 | ||
4078 | This function returns TRUE if a varinfo that matches the given symbol | |
4079 | and address is found with any error; otherwise it returns FALSE. */ | |
4080 | ||
4081 | static bfd_boolean | |
4082 | info_hash_lookup_varinfo (struct info_hash_table *hash_table, | |
4083 | asymbol *sym, | |
4084 | bfd_vma addr, | |
4085 | const char **filename_ptr, | |
4086 | unsigned int *linenumber_ptr) | |
4087 | { | |
4088 | const char *name = bfd_asymbol_name (sym); | |
4089 | asection *sec = bfd_get_section (sym); | |
4090 | struct varinfo* each; | |
4091 | struct info_list_node *node; | |
4092 | ||
4093 | for (node = lookup_info_hash_table (hash_table, name); | |
4094 | node; | |
4095 | node = node->next) | |
4096 | { | |
a50b1753 | 4097 | each = (struct varinfo *) node->info; |
bd210d54 NC |
4098 | if (each->addr == addr |
4099 | && (!each->sec || each->sec == sec)) | |
4100 | { | |
4101 | each->sec = sec; | |
4102 | *filename_ptr = each->file; | |
4103 | *linenumber_ptr = each->line; | |
4104 | return TRUE; | |
4105 | } | |
4106 | } | |
4107 | ||
4108 | return FALSE; | |
4109 | } | |
4110 | ||
4111 | /* Update the funcinfo and varinfo info hash tables if they are | |
4112 | not up to date. Returns TRUE if there is no error; otherwise | |
4113 | returns FALSE and disable the info hash tables. */ | |
4114 | ||
4115 | static bfd_boolean | |
4116 | stash_maybe_update_info_hash_tables (struct dwarf2_debug *stash) | |
4117 | { | |
4118 | struct comp_unit *each; | |
4119 | ||
4120 | /* Exit if hash tables are up-to-date. */ | |
4121 | if (stash->all_comp_units == stash->hash_units_head) | |
4122 | return TRUE; | |
4123 | ||
4124 | if (stash->hash_units_head) | |
4125 | each = stash->hash_units_head->prev_unit; | |
4126 | else | |
4127 | each = stash->last_comp_unit; | |
4128 | ||
4129 | while (each) | |
4130 | { | |
4131 | if (!comp_unit_hash_info (stash, each, stash->funcinfo_hash_table, | |
4132 | stash->varinfo_hash_table)) | |
4133 | { | |
4134 | stash->info_hash_status = STASH_INFO_HASH_DISABLED; | |
4135 | return FALSE; | |
4136 | } | |
4137 | each = each->prev_unit; | |
4138 | } | |
4139 | ||
4140 | stash->hash_units_head = stash->all_comp_units; | |
4141 | return TRUE; | |
4142 | } | |
4143 | ||
089e3718 | 4144 | /* Check consistency of info hash tables. This is for debugging only. */ |
bd210d54 NC |
4145 | |
4146 | static void ATTRIBUTE_UNUSED | |
4147 | stash_verify_info_hash_table (struct dwarf2_debug *stash) | |
4148 | { | |
4149 | struct comp_unit *each_unit; | |
4150 | struct funcinfo *each_func; | |
4151 | struct varinfo *each_var; | |
4152 | struct info_list_node *node; | |
4153 | bfd_boolean found; | |
4154 | ||
4155 | for (each_unit = stash->all_comp_units; | |
4156 | each_unit; | |
4157 | each_unit = each_unit->next_unit) | |
4158 | { | |
4159 | for (each_func = each_unit->function_table; | |
4160 | each_func; | |
4161 | each_func = each_func->prev_func) | |
4162 | { | |
4163 | if (!each_func->name) | |
4164 | continue; | |
4165 | node = lookup_info_hash_table (stash->funcinfo_hash_table, | |
4166 | each_func->name); | |
4167 | BFD_ASSERT (node); | |
4168 | found = FALSE; | |
4169 | while (node && !found) | |
4170 | { | |
4171 | found = node->info == each_func; | |
4172 | node = node->next; | |
4173 | } | |
4174 | BFD_ASSERT (found); | |
4175 | } | |
4176 | ||
4177 | for (each_var = each_unit->variable_table; | |
4178 | each_var; | |
4179 | each_var = each_var->prev_var) | |
4180 | { | |
4181 | if (!each_var->name || !each_var->file || each_var->stack) | |
4182 | continue; | |
4183 | node = lookup_info_hash_table (stash->varinfo_hash_table, | |
4184 | each_var->name); | |
4185 | BFD_ASSERT (node); | |
4186 | found = FALSE; | |
4187 | while (node && !found) | |
4188 | { | |
4189 | found = node->info == each_var; | |
4190 | node = node->next; | |
4191 | } | |
4192 | BFD_ASSERT (found); | |
4193 | } | |
4194 | } | |
4195 | } | |
4196 | ||
4197 | /* Check to see if we want to enable the info hash tables, which consume | |
4198 | quite a bit of memory. Currently we only check the number times | |
4199 | bfd_dwarf2_find_line is called. In the future, we may also want to | |
4200 | take the number of symbols into account. */ | |
4201 | ||
4202 | static void | |
4203 | stash_maybe_enable_info_hash_tables (bfd *abfd, struct dwarf2_debug *stash) | |
4204 | { | |
4205 | BFD_ASSERT (stash->info_hash_status == STASH_INFO_HASH_OFF); | |
4206 | ||
4207 | if (stash->info_hash_count++ < STASH_INFO_HASH_TRIGGER) | |
4208 | return; | |
4209 | ||
4210 | /* FIXME: Maybe we should check the reduce_memory_overheads | |
4211 | and optimize fields in the bfd_link_info structure ? */ | |
4212 | ||
4213 | /* Create hash tables. */ | |
4214 | stash->funcinfo_hash_table = create_info_hash_table (abfd); | |
4215 | stash->varinfo_hash_table = create_info_hash_table (abfd); | |
4216 | if (!stash->funcinfo_hash_table || !stash->varinfo_hash_table) | |
4217 | { | |
4218 | /* Turn off info hashes if any allocation above fails. */ | |
4219 | stash->info_hash_status = STASH_INFO_HASH_DISABLED; | |
4220 | return; | |
4221 | } | |
4222 | /* We need a forced update so that the info hash tables will | |
4223 | be created even though there is no compilation unit. That | |
4224 | happens if STASH_INFO_HASH_TRIGGER is 0. */ | |
4225 | stash_maybe_update_info_hash_tables (stash); | |
4226 | stash->info_hash_status = STASH_INFO_HASH_ON; | |
4227 | } | |
4228 | ||
4229 | /* Find the file and line associated with a symbol and address using the | |
4230 | info hash tables of a stash. If there is a match, the function returns | |
4231 | TRUE and update the locations pointed to by filename_ptr and linenumber_ptr; | |
4232 | otherwise it returns FALSE. */ | |
4233 | ||
4234 | static bfd_boolean | |
4235 | stash_find_line_fast (struct dwarf2_debug *stash, | |
4236 | asymbol *sym, | |
4237 | bfd_vma addr, | |
4238 | const char **filename_ptr, | |
4239 | unsigned int *linenumber_ptr) | |
4240 | { | |
4241 | BFD_ASSERT (stash->info_hash_status == STASH_INFO_HASH_ON); | |
4242 | ||
4243 | if (sym->flags & BSF_FUNCTION) | |
4244 | return info_hash_lookup_funcinfo (stash->funcinfo_hash_table, sym, addr, | |
4245 | filename_ptr, linenumber_ptr); | |
4246 | return info_hash_lookup_varinfo (stash->varinfo_hash_table, sym, addr, | |
4247 | filename_ptr, linenumber_ptr); | |
4248 | } | |
4249 | ||
cd0449ab AM |
4250 | /* Save current section VMAs. */ |
4251 | ||
4252 | static bfd_boolean | |
4253 | save_section_vma (const bfd *abfd, struct dwarf2_debug *stash) | |
4254 | { | |
4255 | asection *s; | |
4256 | unsigned int i; | |
4257 | ||
4258 | if (abfd->section_count == 0) | |
4259 | return TRUE; | |
4260 | stash->sec_vma = bfd_malloc (sizeof (*stash->sec_vma) * abfd->section_count); | |
4261 | if (stash->sec_vma == NULL) | |
4262 | return FALSE; | |
4263 | for (i = 0, s = abfd->sections; i < abfd->section_count; i++, s = s->next) | |
4264 | { | |
4265 | if (s->output_section != NULL) | |
4266 | stash->sec_vma[i] = s->output_section->vma + s->output_offset; | |
4267 | else | |
4268 | stash->sec_vma[i] = s->vma; | |
4269 | } | |
4270 | return TRUE; | |
4271 | } | |
4272 | ||
4273 | /* Compare current section VMAs against those at the time the stash | |
4274 | was created. If find_nearest_line is used in linker warnings or | |
4275 | errors early in the link process, the debug info stash will be | |
4276 | invalid for later calls. This is because we relocate debug info | |
4277 | sections, so the stashed section contents depend on symbol values, | |
4278 | which in turn depend on section VMAs. */ | |
4279 | ||
4280 | static bfd_boolean | |
4281 | section_vma_same (const bfd *abfd, const struct dwarf2_debug *stash) | |
4282 | { | |
4283 | asection *s; | |
4284 | unsigned int i; | |
4285 | ||
4286 | for (i = 0, s = abfd->sections; i < abfd->section_count; i++, s = s->next) | |
4287 | { | |
4288 | bfd_vma vma; | |
4289 | ||
4290 | if (s->output_section != NULL) | |
4291 | vma = s->output_section->vma + s->output_offset; | |
4292 | else | |
4293 | vma = s->vma; | |
4294 | if (vma != stash->sec_vma[i]) | |
4295 | return FALSE; | |
4296 | } | |
4297 | return TRUE; | |
4298 | } | |
4299 | ||
2ca7691a TG |
4300 | /* Read debug information from DEBUG_BFD when DEBUG_BFD is specified. |
4301 | If DEBUG_BFD is not specified, we read debug information from ABFD | |
4302 | or its gnu_debuglink. The results will be stored in PINFO. | |
4303 | The function returns TRUE iff debug information is ready. */ | |
4304 | ||
4305 | bfd_boolean | |
4306 | _bfd_dwarf2_slurp_debug_info (bfd *abfd, bfd *debug_bfd, | |
93ee1e36 AM |
4307 | const struct dwarf_debug_section *debug_sections, |
4308 | asymbol **symbols, | |
4309 | void **pinfo, | |
4310 | bfd_boolean do_place) | |
2ca7691a TG |
4311 | { |
4312 | bfd_size_type amt = sizeof (struct dwarf2_debug); | |
4313 | bfd_size_type total_size; | |
4314 | asection *msec; | |
4315 | struct dwarf2_debug *stash = (struct dwarf2_debug *) *pinfo; | |
4316 | ||
4317 | if (stash != NULL) | |
cd0449ab | 4318 | { |
90ed9b8b | 4319 | if (stash->orig_bfd == abfd |
07d6d2b8 AM |
4320 | && section_vma_same (abfd, stash)) |
4321 | { | |
4322 | /* Check that we did previously find some debug information | |
4323 | before attempting to make use of it. */ | |
4324 | if (stash->bfd_ptr != NULL) | |
4325 | { | |
4326 | if (do_place && !place_sections (abfd, stash)) | |
4327 | return FALSE; | |
4328 | return TRUE; | |
4329 | } | |
4330 | ||
4331 | return FALSE; | |
4332 | } | |
cd0449ab AM |
4333 | _bfd_dwarf2_cleanup_debug_info (abfd, pinfo); |
4334 | memset (stash, 0, amt); | |
4335 | } | |
4336 | else | |
4337 | { | |
4338 | stash = (struct dwarf2_debug *) bfd_zalloc (abfd, amt); | |
4339 | if (! stash) | |
4340 | return FALSE; | |
4341 | } | |
90ed9b8b | 4342 | stash->orig_bfd = abfd; |
2ca7691a | 4343 | stash->debug_sections = debug_sections; |
1c37913d | 4344 | stash->syms = symbols; |
cd0449ab AM |
4345 | if (!save_section_vma (abfd, stash)) |
4346 | return FALSE; | |
2ca7691a TG |
4347 | |
4348 | *pinfo = stash; | |
4349 | ||
4350 | if (debug_bfd == NULL) | |
4351 | debug_bfd = abfd; | |
4352 | ||
4353 | msec = find_debug_info (debug_bfd, debug_sections, NULL); | |
4354 | if (msec == NULL && abfd == debug_bfd) | |
4355 | { | |
2425a30e NC |
4356 | char * debug_filename; |
4357 | ||
4358 | debug_filename = bfd_follow_build_id_debuglink (abfd, DEBUGDIR); | |
4359 | if (debug_filename == NULL) | |
4360 | debug_filename = bfd_follow_gnu_debuglink (abfd, DEBUGDIR); | |
2ca7691a TG |
4361 | |
4362 | if (debug_filename == NULL) | |
4363 | /* No dwarf2 info, and no gnu_debuglink to follow. | |
4364 | Note that at this point the stash has been allocated, but | |
4365 | contains zeros. This lets future calls to this function | |
4366 | fail more quickly. */ | |
4367 | return FALSE; | |
4368 | ||
bf150a0b | 4369 | /* Set BFD_DECOMPRESS to decompress debug sections. */ |
2ca7691a | 4370 | if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL |
bf150a0b L |
4371 | || !(debug_bfd->flags |= BFD_DECOMPRESS, |
4372 | bfd_check_format (debug_bfd, bfd_object)) | |
2ca7691a | 4373 | || (msec = find_debug_info (debug_bfd, |
93ee1e36 AM |
4374 | debug_sections, NULL)) == NULL |
4375 | || !bfd_generic_link_read_symbols (debug_bfd)) | |
2ca7691a TG |
4376 | { |
4377 | if (debug_bfd) | |
4378 | bfd_close (debug_bfd); | |
4379 | /* FIXME: Should we report our failure to follow the debuglink ? */ | |
4380 | free (debug_filename); | |
4381 | return FALSE; | |
4382 | } | |
93ee1e36 AM |
4383 | |
4384 | symbols = bfd_get_outsymbols (debug_bfd); | |
4385 | stash->syms = symbols; | |
1c37913d | 4386 | stash->close_on_cleanup = TRUE; |
2ca7691a | 4387 | } |
1c37913d | 4388 | stash->bfd_ptr = debug_bfd; |
2ca7691a | 4389 | |
93ee1e36 AM |
4390 | if (do_place |
4391 | && !place_sections (abfd, stash)) | |
4392 | return FALSE; | |
4393 | ||
2ca7691a TG |
4394 | /* There can be more than one DWARF2 info section in a BFD these |
4395 | days. First handle the easy case when there's only one. If | |
4396 | there's more than one, try case two: none of the sections is | |
4397 | compressed. In that case, read them all in and produce one | |
4398 | large stash. We do this in two passes - in the first pass we | |
4399 | just accumulate the section sizes, and in the second pass we | |
4400 | read in the section's contents. (The allows us to avoid | |
4401 | reallocing the data as we add sections to the stash.) If | |
4402 | some or all sections are compressed, then do things the slow | |
4403 | way, with a bunch of reallocs. */ | |
4404 | ||
4405 | if (! find_debug_info (debug_bfd, debug_sections, msec)) | |
4406 | { | |
4407 | /* Case 1: only one info section. */ | |
4408 | total_size = msec->size; | |
4409 | if (! read_section (debug_bfd, &stash->debug_sections[debug_info], | |
4410 | symbols, 0, | |
4411 | &stash->info_ptr_memory, &total_size)) | |
4412 | return FALSE; | |
4413 | } | |
4414 | else | |
4415 | { | |
4416 | /* Case 2: multiple sections. */ | |
4417 | for (total_size = 0; | |
4418 | msec; | |
4419 | msec = find_debug_info (debug_bfd, debug_sections, msec)) | |
4420 | total_size += msec->size; | |
4421 | ||
4422 | stash->info_ptr_memory = (bfd_byte *) bfd_malloc (total_size); | |
4423 | if (stash->info_ptr_memory == NULL) | |
4424 | return FALSE; | |
4425 | ||
4426 | total_size = 0; | |
4427 | for (msec = find_debug_info (debug_bfd, debug_sections, NULL); | |
4428 | msec; | |
4429 | msec = find_debug_info (debug_bfd, debug_sections, msec)) | |
4430 | { | |
4431 | bfd_size_type size; | |
4432 | ||
4433 | size = msec->size; | |
4434 | if (size == 0) | |
4435 | continue; | |
4436 | ||
4437 | if (!(bfd_simple_get_relocated_section_contents | |
4438 | (debug_bfd, msec, stash->info_ptr_memory + total_size, | |
4439 | symbols))) | |
4440 | return FALSE; | |
4441 | ||
4442 | total_size += size; | |
4443 | } | |
4444 | } | |
4445 | ||
4446 | stash->info_ptr = stash->info_ptr_memory; | |
4447 | stash->info_ptr_end = stash->info_ptr + total_size; | |
4448 | stash->sec = find_debug_info (debug_bfd, debug_sections, NULL); | |
4449 | stash->sec_info_ptr = stash->info_ptr; | |
2ca7691a TG |
4450 | return TRUE; |
4451 | } | |
4452 | ||
425bd9e1 NC |
4453 | /* Scan the debug information in PINFO looking for a DW_TAG_subprogram |
4454 | abbrev with a DW_AT_low_pc attached to it. Then lookup that same | |
4455 | symbol in SYMBOLS and return the difference between the low_pc and | |
4456 | the symbol's address. Returns 0 if no suitable symbol could be found. */ | |
4457 | ||
4458 | bfd_signed_vma | |
4459 | _bfd_dwarf2_find_symbol_bias (asymbol ** symbols, void ** pinfo) | |
4460 | { | |
4461 | struct dwarf2_debug *stash; | |
4462 | struct comp_unit * unit; | |
4463 | ||
4464 | stash = (struct dwarf2_debug *) *pinfo; | |
4465 | ||
4466 | if (stash == NULL) | |
4467 | return 0; | |
4468 | ||
4469 | for (unit = stash->all_comp_units; unit; unit = unit->next_unit) | |
4470 | { | |
4471 | struct funcinfo * func; | |
4472 | ||
4473 | if (unit->function_table == NULL) | |
4474 | { | |
4475 | if (unit->line_table == NULL) | |
4476 | unit->line_table = decode_line_info (unit, stash); | |
4477 | if (unit->line_table != NULL) | |
4478 | scan_unit_for_symbols (unit); | |
4479 | } | |
4480 | ||
4481 | for (func = unit->function_table; func != NULL; func = func->prev_func) | |
4482 | if (func->name && func->arange.low) | |
4483 | { | |
4484 | asymbol ** psym; | |
4485 | ||
4486 | /* FIXME: Do we need to scan the aranges looking for the lowest pc value ? */ | |
4487 | ||
4488 | for (psym = symbols; * psym != NULL; psym++) | |
4489 | { | |
4490 | asymbol * sym = * psym; | |
4491 | ||
4492 | if (sym->flags & BSF_FUNCTION | |
4493 | && sym->section != NULL | |
4494 | && strcmp (sym->name, func->name) == 0) | |
4495 | return ((bfd_signed_vma) func->arange.low) - | |
4496 | ((bfd_signed_vma) (sym->value + sym->section->vma)); | |
4497 | } | |
4498 | } | |
4499 | } | |
4500 | ||
4501 | return 0; | |
4502 | } | |
4503 | ||
bec42b15 NC |
4504 | /* Find the source code location of SYMBOL. If SYMBOL is NULL |
4505 | then find the nearest source code location corresponding to | |
4506 | the address SECTION + OFFSET. | |
4507 | Returns TRUE if the line is found without error and fills in | |
4508 | FILENAME_PTR and LINENUMBER_PTR. In the case where SYMBOL was | |
4509 | NULL the FUNCTIONNAME_PTR is also filled in. | |
4510 | SYMBOLS contains the symbol table for ABFD. | |
fc28f9aa | 4511 | DEBUG_SECTIONS contains the name of the dwarf debug sections. |
bec42b15 NC |
4512 | ADDR_SIZE is the number of bytes in the initial .debug_info length |
4513 | field and in the abbreviation offset, or zero to indicate that the | |
4514 | default value should be used. */ | |
252b5132 | 4515 | |
fb167eb2 AM |
4516 | bfd_boolean |
4517 | _bfd_dwarf2_find_nearest_line (bfd *abfd, | |
4518 | asymbol **symbols, | |
4519 | asymbol *symbol, | |
4520 | asection *section, | |
4521 | bfd_vma offset, | |
4522 | const char **filename_ptr, | |
4523 | const char **functionname_ptr, | |
4524 | unsigned int *linenumber_ptr, | |
4525 | unsigned int *discriminator_ptr, | |
4526 | const struct dwarf_debug_section *debug_sections, | |
4527 | unsigned int addr_size, | |
4528 | void **pinfo) | |
252b5132 RH |
4529 | { |
4530 | /* Read each compilation unit from the section .debug_info, and check | |
4531 | to see if it contains the address we are searching for. If yes, | |
4532 | lookup the address, and return the line number info. If no, go | |
98591c73 | 4533 | on to the next compilation unit. |
252b5132 RH |
4534 | |
4535 | We keep a list of all the previously read compilation units, and | |
98591c73 | 4536 | a pointer to the next un-read compilation unit. Check the |
a092b084 | 4537 | previously read units before reading more. */ |
1ba54ee0 | 4538 | struct dwarf2_debug *stash; |
a092b084 | 4539 | /* What address are we looking for? */ |
1ba54ee0 | 4540 | bfd_vma addr; |
252b5132 | 4541 | struct comp_unit* each; |
e00e8198 | 4542 | struct funcinfo *function = NULL; |
240d6706 | 4543 | bfd_boolean found = FALSE; |
bec42b15 | 4544 | bfd_boolean do_line; |
d4c32a81 | 4545 | |
2ca7691a TG |
4546 | *filename_ptr = NULL; |
4547 | if (functionname_ptr != NULL) | |
4548 | *functionname_ptr = NULL; | |
4549 | *linenumber_ptr = 0; | |
f725daa8 CC |
4550 | if (discriminator_ptr) |
4551 | *discriminator_ptr = 0; | |
d4c32a81 | 4552 | |
93ee1e36 AM |
4553 | if (! _bfd_dwarf2_slurp_debug_info (abfd, NULL, debug_sections, |
4554 | symbols, pinfo, | |
4555 | (abfd->flags & (EXEC_P | DYNAMIC)) == 0)) | |
2ca7691a | 4556 | return FALSE; |
d4c32a81 | 4557 | |
2ca7691a | 4558 | stash = (struct dwarf2_debug *) *pinfo; |
d4c32a81 | 4559 | |
fb167eb2 | 4560 | do_line = symbol != NULL; |
bec42b15 NC |
4561 | if (do_line) |
4562 | { | |
fb167eb2 | 4563 | BFD_ASSERT (section == NULL && offset == 0 && functionname_ptr == NULL); |
bec42b15 | 4564 | section = bfd_get_section (symbol); |
fb167eb2 | 4565 | addr = symbol->value; |
bec42b15 | 4566 | } |
bec42b15 | 4567 | else |
fb167eb2 AM |
4568 | { |
4569 | BFD_ASSERT (section != NULL && functionname_ptr != NULL); | |
4570 | addr = offset; | |
3239a423 AB |
4571 | |
4572 | /* If we have no SYMBOL but the section we're looking at is not a | |
07d6d2b8 AM |
4573 | code section, then take a look through the list of symbols to see |
4574 | if we have a symbol at the address we're looking for. If we do | |
4575 | then use this to look up line information. This will allow us to | |
4576 | give file and line results for data symbols. We exclude code | |
4577 | symbols here, if we look up a function symbol and then look up the | |
4578 | line information we'll actually return the line number for the | |
4579 | opening '{' rather than the function definition line. This is | |
4580 | because looking up by symbol uses the line table, in which the | |
4581 | first line for a function is usually the opening '{', while | |
4582 | looking up the function by section + offset uses the | |
4583 | DW_AT_decl_line from the function DW_TAG_subprogram for the line, | |
4584 | which will be the line of the function name. */ | |
97e83a10 | 4585 | if (symbols != NULL && (section->flags & SEC_CODE) == 0) |
3239a423 AB |
4586 | { |
4587 | asymbol **tmp; | |
4588 | ||
4589 | for (tmp = symbols; (*tmp) != NULL; ++tmp) | |
4590 | if ((*tmp)->the_bfd == abfd | |
4591 | && (*tmp)->section == section | |
4592 | && (*tmp)->value == offset | |
4593 | && ((*tmp)->flags & BSF_SECTION_SYM) == 0) | |
4594 | { | |
4595 | symbol = *tmp; | |
4596 | do_line = TRUE; | |
07d6d2b8 AM |
4597 | /* For local symbols, keep going in the hope we find a |
4598 | global. */ | |
4599 | if ((symbol->flags & BSF_GLOBAL) != 0) | |
4600 | break; | |
3239a423 AB |
4601 | } |
4602 | } | |
fb167eb2 | 4603 | } |
bec42b15 | 4604 | |
1ba54ee0 | 4605 | if (section->output_section) |
6dd55cb7 | 4606 | addr += section->output_section->vma + section->output_offset; |
1ba54ee0 | 4607 | else |
6dd55cb7 | 4608 | addr += section->vma; |
a092b084 | 4609 | |
98591c73 | 4610 | /* A null info_ptr indicates that there is no dwarf2 info |
a092b084 | 4611 | (or that an error occured while setting up the stash). */ |
252b5132 | 4612 | if (! stash->info_ptr) |
2ca7691a | 4613 | return FALSE; |
252b5132 | 4614 | |
4ab527b0 FF |
4615 | stash->inliner_chain = NULL; |
4616 | ||
a092b084 | 4617 | /* Check the previously read comp. units first. */ |
bd210d54 NC |
4618 | if (do_line) |
4619 | { | |
4620 | /* The info hash tables use quite a bit of memory. We may not want to | |
4621 | always use them. We use some heuristics to decide if and when to | |
4622 | turn it on. */ | |
4623 | if (stash->info_hash_status == STASH_INFO_HASH_OFF) | |
4624 | stash_maybe_enable_info_hash_tables (abfd, stash); | |
4625 | ||
4626 | /* Keep info hash table up to date if they are available. Note that we | |
089e3718 | 4627 | may disable the hash tables if there is any error duing update. */ |
bd210d54 NC |
4628 | if (stash->info_hash_status == STASH_INFO_HASH_ON) |
4629 | stash_maybe_update_info_hash_tables (stash); | |
4630 | ||
4631 | if (stash->info_hash_status == STASH_INFO_HASH_ON) | |
4632 | { | |
4633 | found = stash_find_line_fast (stash, symbol, addr, filename_ptr, | |
4634 | linenumber_ptr); | |
4635 | if (found) | |
4636 | goto done; | |
4637 | } | |
0d161102 | 4638 | else |
bd210d54 NC |
4639 | { |
4640 | /* Check the previously read comp. units first. */ | |
4641 | for (each = stash->all_comp_units; each; each = each->next_unit) | |
4642 | if ((symbol->flags & BSF_FUNCTION) == 0 | |
a2a50954 | 4643 | || each->arange.high == 0 |
bd210d54 NC |
4644 | || comp_unit_contains_address (each, addr)) |
4645 | { | |
4646 | found = comp_unit_find_line (each, symbol, addr, filename_ptr, | |
4647 | linenumber_ptr, stash); | |
4648 | if (found) | |
4649 | goto done; | |
4650 | } | |
4651 | } | |
4652 | } | |
4653 | else | |
4654 | { | |
240d6706 NC |
4655 | bfd_vma min_range = (bfd_vma) -1; |
4656 | const char * local_filename = NULL; | |
e00e8198 | 4657 | struct funcinfo *local_function = NULL; |
240d6706 NC |
4658 | unsigned int local_linenumber = 0; |
4659 | unsigned int local_discriminator = 0; | |
96691246 | 4660 | |
709d67f1 AM |
4661 | for (each = stash->all_comp_units; each; each = each->next_unit) |
4662 | { | |
240d6706 NC |
4663 | bfd_vma range = (bfd_vma) -1; |
4664 | ||
a2a50954 AM |
4665 | found = ((each->arange.high == 0 |
4666 | || comp_unit_contains_address (each, addr)) | |
240d6706 NC |
4667 | && (range = comp_unit_find_nearest_line (each, addr, |
4668 | & local_filename, | |
e00e8198 | 4669 | & local_function, |
240d6706 NC |
4670 | & local_linenumber, |
4671 | & local_discriminator, | |
4672 | stash)) != 0); | |
709d67f1 | 4673 | if (found) |
240d6706 NC |
4674 | { |
4675 | /* PRs 15935 15994: Bogus debug information may have provided us | |
4676 | with an erroneous match. We attempt to counter this by | |
4677 | selecting the match that has the smallest address range | |
4678 | associated with it. (We are assuming that corrupt debug info | |
4679 | will tend to result in extra large address ranges rather than | |
4680 | extra small ranges). | |
4681 | ||
4682 | This does mean that we scan through all of the CUs associated | |
4683 | with the bfd each time this function is called. But this does | |
4684 | have the benefit of producing consistent results every time the | |
4685 | function is called. */ | |
4686 | if (range <= min_range) | |
4687 | { | |
4688 | if (filename_ptr && local_filename) | |
4689 | * filename_ptr = local_filename; | |
e00e8198 AM |
4690 | if (local_function) |
4691 | function = local_function; | |
240d6706 NC |
4692 | if (discriminator_ptr && local_discriminator) |
4693 | * discriminator_ptr = local_discriminator; | |
4694 | if (local_linenumber) | |
4695 | * linenumber_ptr = local_linenumber; | |
4696 | min_range = range; | |
4697 | } | |
4698 | } | |
4699 | } | |
4700 | ||
4701 | if (* linenumber_ptr) | |
4702 | { | |
4703 | found = TRUE; | |
4704 | goto done; | |
709d67f1 | 4705 | } |
5420f73d L |
4706 | } |
4707 | ||
5420f73d L |
4708 | /* The DWARF2 spec says that the initial length field, and the |
4709 | offset of the abbreviation table, should both be 4-byte values. | |
4710 | However, some compilers do things differently. */ | |
4711 | if (addr_size == 0) | |
4712 | addr_size = 4; | |
4713 | BFD_ASSERT (addr_size == 4 || addr_size == 8); | |
4714 | ||
4715 | /* Read each remaining comp. units checking each as they are read. */ | |
4716 | while (stash->info_ptr < stash->info_ptr_end) | |
4717 | { | |
4718 | bfd_vma length; | |
4719 | unsigned int offset_size = addr_size; | |
4720 | bfd_byte *info_ptr_unit = stash->info_ptr; | |
4721 | ||
dbb3fbbb | 4722 | length = read_4_bytes (stash->bfd_ptr, stash->info_ptr, stash->info_ptr_end); |
bec42b15 NC |
4723 | /* A 0xffffff length is the DWARF3 way of indicating |
4724 | we use 64-bit offsets, instead of 32-bit offsets. */ | |
5420f73d L |
4725 | if (length == 0xffffffff) |
4726 | { | |
4727 | offset_size = 8; | |
dbb3fbbb | 4728 | length = read_8_bytes (stash->bfd_ptr, stash->info_ptr + 4, stash->info_ptr_end); |
5420f73d L |
4729 | stash->info_ptr += 12; |
4730 | } | |
4731 | /* A zero length is the IRIX way of indicating 64-bit offsets, | |
4732 | mostly because the 64-bit length will generally fit in 32 | |
4733 | bits, and the endianness helps. */ | |
4734 | else if (length == 0) | |
4735 | { | |
4736 | offset_size = 8; | |
dbb3fbbb | 4737 | length = read_4_bytes (stash->bfd_ptr, stash->info_ptr + 4, stash->info_ptr_end); |
5420f73d L |
4738 | stash->info_ptr += 8; |
4739 | } | |
024b2372 CD |
4740 | /* In the absence of the hints above, we assume 32-bit DWARF2 |
4741 | offsets even for targets with 64-bit addresses, because: | |
4742 | a) most of the time these targets will not have generated | |
4743 | more than 2Gb of debug info and so will not need 64-bit | |
4744 | offsets, | |
4745 | and | |
4746 | b) if they do use 64-bit offsets but they are not using | |
4747 | the size hints that are tested for above then they are | |
4748 | not conforming to the DWARF3 standard anyway. */ | |
5420f73d L |
4749 | else if (addr_size == 8) |
4750 | { | |
024b2372 | 4751 | offset_size = 4; |
2d47a72c | 4752 | stash->info_ptr += 4; |
5420f73d L |
4753 | } |
4754 | else | |
4755 | stash->info_ptr += 4; | |
4756 | ||
4757 | if (length > 0) | |
4758 | { | |
dbb3fbbb NC |
4759 | bfd_byte * new_ptr; |
4760 | ||
d11135f5 NC |
4761 | /* PR 21151 */ |
4762 | if (stash->info_ptr + length > stash->info_ptr_end) | |
4763 | return FALSE; | |
4764 | ||
0d161102 | 4765 | each = parse_comp_unit (stash, length, info_ptr_unit, |
5420f73d | 4766 | offset_size); |
d74e4b29 NS |
4767 | if (!each) |
4768 | /* The dwarf information is damaged, don't trust it any | |
4769 | more. */ | |
4770 | break; | |
5420f73d | 4771 | |
dbb3fbbb NC |
4772 | new_ptr = stash->info_ptr + length; |
4773 | /* PR 17512: file: 1500698c. */ | |
4774 | if (new_ptr < stash->info_ptr) | |
4775 | { | |
4776 | /* A corrupt length value - do not trust the info any more. */ | |
4777 | found = FALSE; | |
4778 | break; | |
4779 | } | |
62f8d217 | 4780 | else |
dbb3fbbb | 4781 | stash->info_ptr = new_ptr; |
62f8d217 | 4782 | |
d74e4b29 NS |
4783 | if (stash->all_comp_units) |
4784 | stash->all_comp_units->prev_unit = each; | |
4785 | else | |
4786 | stash->last_comp_unit = each; | |
68ffbac6 | 4787 | |
d74e4b29 NS |
4788 | each->next_unit = stash->all_comp_units; |
4789 | stash->all_comp_units = each; | |
68ffbac6 | 4790 | |
d74e4b29 NS |
4791 | /* DW_AT_low_pc and DW_AT_high_pc are optional for |
4792 | compilation units. If we don't have them (i.e., | |
4793 | unit->high == 0), we need to consult the line info table | |
4794 | to see if a compilation unit contains the given | |
4795 | address. */ | |
4796 | if (do_line) | |
4797 | found = (((symbol->flags & BSF_FUNCTION) == 0 | |
4798 | || each->arange.high == 0 | |
4799 | || comp_unit_contains_address (each, addr)) | |
4800 | && comp_unit_find_line (each, symbol, addr, | |
4801 | filename_ptr, | |
4802 | linenumber_ptr, | |
4803 | stash)); | |
4804 | else | |
4805 | found = ((each->arange.high == 0 | |
4806 | || comp_unit_contains_address (each, addr)) | |
4807 | && comp_unit_find_nearest_line (each, addr, | |
4808 | filename_ptr, | |
e00e8198 | 4809 | &function, |
d74e4b29 | 4810 | linenumber_ptr, |
9b8d1a36 | 4811 | discriminator_ptr, |
fa15f18d | 4812 | stash) != 0); |
be04437d AM |
4813 | |
4814 | if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr) | |
4815 | == stash->sec->size) | |
4816 | { | |
fc28f9aa | 4817 | stash->sec = find_debug_info (stash->bfd_ptr, debug_sections, |
93ee1e36 | 4818 | stash->sec); |
be04437d AM |
4819 | stash->sec_info_ptr = stash->info_ptr; |
4820 | } | |
4821 | ||
d74e4b29 NS |
4822 | if (found) |
4823 | goto done; | |
5420f73d L |
4824 | } |
4825 | } | |
4826 | ||
a2a50954 | 4827 | done: |
e00e8198 AM |
4828 | if (function) |
4829 | { | |
923b198a | 4830 | if (!function->is_linkage) |
e00e8198 | 4831 | { |
923b198a AM |
4832 | asymbol *fun; |
4833 | bfd_vma sec_vma; | |
4834 | ||
4835 | fun = _bfd_elf_find_function (abfd, symbols, section, offset, | |
4836 | *filename_ptr ? NULL : filename_ptr, | |
4837 | functionname_ptr); | |
4838 | sec_vma = section->vma; | |
4839 | if (section->output_section != NULL) | |
4840 | sec_vma = section->output_section->vma + section->output_offset; | |
4841 | if (fun != NULL | |
4842 | && fun->value + sec_vma == function->arange.low) | |
4843 | function->name = *functionname_ptr; | |
4844 | /* Even if we didn't find a linkage name, say that we have | |
4845 | to stop a repeated search of symbols. */ | |
e00e8198 AM |
4846 | function->is_linkage = TRUE; |
4847 | } | |
923b198a | 4848 | *functionname_ptr = function->name; |
e00e8198 | 4849 | } |
d4c32a81 L |
4850 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) |
4851 | unset_sections (stash); | |
4852 | ||
4853 | return found; | |
5420f73d L |
4854 | } |
4855 | ||
4ab527b0 FF |
4856 | bfd_boolean |
4857 | _bfd_dwarf2_find_inliner_info (bfd *abfd ATTRIBUTE_UNUSED, | |
4858 | const char **filename_ptr, | |
4859 | const char **functionname_ptr, | |
4860 | unsigned int *linenumber_ptr, | |
4861 | void **pinfo) | |
4862 | { | |
4863 | struct dwarf2_debug *stash; | |
4864 | ||
a50b1753 | 4865 | stash = (struct dwarf2_debug *) *pinfo; |
4ab527b0 FF |
4866 | if (stash) |
4867 | { | |
4868 | struct funcinfo *func = stash->inliner_chain; | |
bec42b15 | 4869 | |
4ab527b0 FF |
4870 | if (func && func->caller_func) |
4871 | { | |
4872 | *filename_ptr = func->caller_file; | |
4873 | *functionname_ptr = func->caller_func->name; | |
4874 | *linenumber_ptr = func->caller_line; | |
4875 | stash->inliner_chain = func->caller_func; | |
bec42b15 | 4876 | return TRUE; |
4ab527b0 FF |
4877 | } |
4878 | } | |
4879 | ||
bec42b15 | 4880 | return FALSE; |
4ab527b0 FF |
4881 | } |
4882 | ||
35330cce | 4883 | void |
d9071b0c | 4884 | _bfd_dwarf2_cleanup_debug_info (bfd *abfd, void **pinfo) |
35330cce | 4885 | { |
5bb3703f | 4886 | struct dwarf2_debug *stash = (struct dwarf2_debug *) *pinfo; |
35330cce | 4887 | struct comp_unit *each; |
35330cce | 4888 | |
d9071b0c | 4889 | if (abfd == NULL || stash == NULL) |
35330cce NC |
4890 | return; |
4891 | ||
4892 | for (each = stash->all_comp_units; each; each = each->next_unit) | |
4893 | { | |
34b5e0b2 | 4894 | struct abbrev_info **abbrevs = each->abbrevs; |
90b5b1a5 NC |
4895 | struct funcinfo *function_table = each->function_table; |
4896 | struct varinfo *variable_table = each->variable_table; | |
34b5e0b2 | 4897 | size_t i; |
35330cce | 4898 | |
34b5e0b2 | 4899 | for (i = 0; i < ABBREV_HASH_SIZE; i++) |
d8d1c398 | 4900 | { |
34b5e0b2 | 4901 | struct abbrev_info *abbrev = abbrevs[i]; |
35330cce | 4902 | |
34b5e0b2 | 4903 | while (abbrev) |
d8d1c398 | 4904 | { |
34b5e0b2 NC |
4905 | free (abbrev->attrs); |
4906 | abbrev = abbrev->next; | |
d8d1c398 AM |
4907 | } |
4908 | } | |
35330cce NC |
4909 | |
4910 | if (each->line_table) | |
d8d1c398 | 4911 | { |
34b5e0b2 NC |
4912 | free (each->line_table->dirs); |
4913 | free (each->line_table->files); | |
d8d1c398 | 4914 | } |
90b5b1a5 NC |
4915 | |
4916 | while (function_table) | |
4917 | { | |
4918 | if (function_table->file) | |
4919 | { | |
4920 | free (function_table->file); | |
4921 | function_table->file = NULL; | |
4922 | } | |
4923 | ||
4924 | if (function_table->caller_file) | |
4925 | { | |
4926 | free (function_table->caller_file); | |
4927 | function_table->caller_file = NULL; | |
4928 | } | |
4929 | function_table = function_table->prev_func; | |
4930 | } | |
4931 | ||
089e3718 IT |
4932 | if (each->lookup_funcinfo_table) |
4933 | { | |
4934 | free (each->lookup_funcinfo_table); | |
4935 | each->lookup_funcinfo_table = NULL; | |
4936 | } | |
4937 | ||
90b5b1a5 NC |
4938 | while (variable_table) |
4939 | { | |
4940 | if (variable_table->file) | |
4941 | { | |
4942 | free (variable_table->file); | |
4943 | variable_table->file = NULL; | |
4944 | } | |
4945 | ||
4946 | variable_table = variable_table->prev_var; | |
4947 | } | |
35330cce NC |
4948 | } |
4949 | ||
b55ec8b6 AM |
4950 | if (stash->funcinfo_hash_table) |
4951 | bfd_hash_table_free (&stash->funcinfo_hash_table->base); | |
4952 | if (stash->varinfo_hash_table) | |
4953 | bfd_hash_table_free (&stash->varinfo_hash_table->base); | |
5d0900eb AM |
4954 | if (stash->dwarf_abbrev_buffer) |
4955 | free (stash->dwarf_abbrev_buffer); | |
4956 | if (stash->dwarf_line_buffer) | |
4957 | free (stash->dwarf_line_buffer); | |
4958 | if (stash->dwarf_str_buffer) | |
4959 | free (stash->dwarf_str_buffer); | |
0041f7df JK |
4960 | if (stash->dwarf_line_str_buffer) |
4961 | free (stash->dwarf_line_str_buffer); | |
5d0900eb AM |
4962 | if (stash->dwarf_ranges_buffer) |
4963 | free (stash->dwarf_ranges_buffer); | |
4964 | if (stash->info_ptr_memory) | |
4965 | free (stash->info_ptr_memory); | |
1c37913d AM |
4966 | if (stash->close_on_cleanup) |
4967 | bfd_close (stash->bfd_ptr); | |
95e34fb4 NC |
4968 | if (stash->alt_dwarf_str_buffer) |
4969 | free (stash->alt_dwarf_str_buffer); | |
4970 | if (stash->alt_dwarf_info_buffer) | |
4971 | free (stash->alt_dwarf_info_buffer); | |
cd0449ab AM |
4972 | if (stash->sec_vma) |
4973 | free (stash->sec_vma); | |
93ee1e36 AM |
4974 | if (stash->adjusted_sections) |
4975 | free (stash->adjusted_sections); | |
95e34fb4 NC |
4976 | if (stash->alt_bfd_ptr) |
4977 | bfd_close (stash->alt_bfd_ptr); | |
35330cce | 4978 | } |
e00e8198 AM |
4979 | |
4980 | /* Find the function to a particular section and offset, | |
4981 | for error reporting. */ | |
4982 | ||
923b198a | 4983 | asymbol * |
e00e8198 AM |
4984 | _bfd_elf_find_function (bfd *abfd, |
4985 | asymbol **symbols, | |
4986 | asection *section, | |
4987 | bfd_vma offset, | |
4988 | const char **filename_ptr, | |
4989 | const char **functionname_ptr) | |
4990 | { | |
4991 | struct elf_find_function_cache | |
4992 | { | |
4993 | asection *last_section; | |
4994 | asymbol *func; | |
4995 | const char *filename; | |
4996 | bfd_size_type func_size; | |
4997 | } *cache; | |
4998 | ||
4999 | if (symbols == NULL) | |
923b198a | 5000 | return NULL; |
e00e8198 AM |
5001 | |
5002 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
923b198a | 5003 | return NULL; |
e00e8198 AM |
5004 | |
5005 | cache = elf_tdata (abfd)->elf_find_function_cache; | |
5006 | if (cache == NULL) | |
5007 | { | |
5008 | cache = bfd_zalloc (abfd, sizeof (*cache)); | |
5009 | elf_tdata (abfd)->elf_find_function_cache = cache; | |
5010 | if (cache == NULL) | |
923b198a | 5011 | return NULL; |
e00e8198 AM |
5012 | } |
5013 | if (cache->last_section != section | |
5014 | || cache->func == NULL | |
5015 | || offset < cache->func->value | |
5016 | || offset >= cache->func->value + cache->func_size) | |
5017 | { | |
5018 | asymbol *file; | |
5019 | bfd_vma low_func; | |
5020 | asymbol **p; | |
5021 | /* ??? Given multiple file symbols, it is impossible to reliably | |
5022 | choose the right file name for global symbols. File symbols are | |
5023 | local symbols, and thus all file symbols must sort before any | |
5024 | global symbols. The ELF spec may be interpreted to say that a | |
5025 | file symbol must sort before other local symbols, but currently | |
5026 | ld -r doesn't do this. So, for ld -r output, it is possible to | |
5027 | make a better choice of file name for local symbols by ignoring | |
5028 | file symbols appearing after a given local symbol. */ | |
5029 | enum { nothing_seen, symbol_seen, file_after_symbol_seen } state; | |
5030 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5031 | ||
5032 | file = NULL; | |
5033 | low_func = 0; | |
5034 | state = nothing_seen; | |
5035 | cache->filename = NULL; | |
5036 | cache->func = NULL; | |
5037 | cache->func_size = 0; | |
5038 | cache->last_section = section; | |
5039 | ||
5040 | for (p = symbols; *p != NULL; p++) | |
5041 | { | |
5042 | asymbol *sym = *p; | |
5043 | bfd_vma code_off; | |
5044 | bfd_size_type size; | |
5045 | ||
5046 | if ((sym->flags & BSF_FILE) != 0) | |
5047 | { | |
5048 | file = sym; | |
5049 | if (state == symbol_seen) | |
5050 | state = file_after_symbol_seen; | |
5051 | continue; | |
5052 | } | |
5053 | ||
5054 | size = bed->maybe_function_sym (sym, section, &code_off); | |
5055 | if (size != 0 | |
5056 | && code_off <= offset | |
5057 | && (code_off > low_func | |
5058 | || (code_off == low_func | |
5059 | && size > cache->func_size))) | |
5060 | { | |
5061 | cache->func = sym; | |
5062 | cache->func_size = size; | |
5063 | cache->filename = NULL; | |
5064 | low_func = code_off; | |
5065 | if (file != NULL | |
5066 | && ((sym->flags & BSF_LOCAL) != 0 | |
5067 | || state != file_after_symbol_seen)) | |
5068 | cache->filename = bfd_asymbol_name (file); | |
5069 | } | |
5070 | if (state == nothing_seen) | |
5071 | state = symbol_seen; | |
5072 | } | |
5073 | } | |
5074 | ||
5075 | if (cache->func == NULL) | |
923b198a | 5076 | return NULL; |
e00e8198 AM |
5077 | |
5078 | if (filename_ptr) | |
5079 | *filename_ptr = cache->filename; | |
5080 | if (functionname_ptr) | |
5081 | *functionname_ptr = bfd_asymbol_name (cache->func); | |
5082 | ||
923b198a | 5083 | return cache->func; |
e00e8198 | 5084 | } |