Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* DWARF 2 support. |
6f2750fe | 2 | Copyright (C) 1994-2016 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 | |
0d161102 NC |
103 | /* Pointer to the bfd, section and address of the beginning of the |
104 | section. The bfd might be different than expected because of | |
105 | gnu_debuglink sections. */ | |
a50b1753 | 106 | bfd *bfd_ptr; |
f075ee0c AM |
107 | asection *sec; |
108 | bfd_byte *sec_info_ptr; | |
f2363ce5 | 109 | |
95e34fb4 NC |
110 | /* Support for alternate debug info sections created by the DWZ utility: |
111 | This includes a pointer to an alternate bfd which contains *extra*, | |
112 | possibly duplicate debug sections, and pointers to the loaded | |
113 | .debug_str and .debug_info sections from this bfd. */ | |
114 | bfd * alt_bfd_ptr; | |
115 | bfd_byte * alt_dwarf_str_buffer; | |
116 | bfd_size_type alt_dwarf_str_size; | |
117 | bfd_byte * alt_dwarf_info_buffer; | |
118 | bfd_size_type alt_dwarf_info_size; | |
119 | ||
aaf30c25 CS |
120 | /* A pointer to the memory block allocated for info_ptr. Neither |
121 | info_ptr nor sec_info_ptr are guaranteed to stay pointing to the | |
122 | beginning of the malloc block. This is used only to free the | |
123 | memory later. */ | |
124 | bfd_byte *info_ptr_memory; | |
125 | ||
f2363ce5 | 126 | /* Pointer to the symbol table. */ |
f075ee0c | 127 | asymbol **syms; |
f2363ce5 | 128 | |
a092b084 | 129 | /* Pointer to the .debug_abbrev section loaded into memory. */ |
f075ee0c | 130 | bfd_byte *dwarf_abbrev_buffer; |
252b5132 | 131 | |
a092b084 | 132 | /* Length of the loaded .debug_abbrev section. */ |
3076cd1f | 133 | bfd_size_type dwarf_abbrev_size; |
69dd2e2d RH |
134 | |
135 | /* Buffer for decode_line_info. */ | |
f075ee0c | 136 | bfd_byte *dwarf_line_buffer; |
ccdb16fc JW |
137 | |
138 | /* Length of the loaded .debug_line section. */ | |
3076cd1f | 139 | bfd_size_type dwarf_line_size; |
d03ba2a1 JJ |
140 | |
141 | /* Pointer to the .debug_str section loaded into memory. */ | |
f075ee0c | 142 | bfd_byte *dwarf_str_buffer; |
d03ba2a1 JJ |
143 | |
144 | /* Length of the loaded .debug_str section. */ | |
3076cd1f | 145 | bfd_size_type dwarf_str_size; |
a13afe8e | 146 | |
089e3718 | 147 | /* Pointer to the .debug_ranges section loaded into memory. */ |
a13afe8e FF |
148 | bfd_byte *dwarf_ranges_buffer; |
149 | ||
089e3718 | 150 | /* Length of the loaded .debug_ranges section. */ |
3076cd1f | 151 | bfd_size_type dwarf_ranges_size; |
4ab527b0 FF |
152 | |
153 | /* If the most recent call to bfd_find_nearest_line was given an | |
154 | address in an inlined function, preserve a pointer into the | |
155 | calling chain for subsequent calls to bfd_find_inliner_info to | |
089e3718 | 156 | use. */ |
4ab527b0 | 157 | struct funcinfo *inliner_chain; |
d4c32a81 | 158 | |
cd0449ab AM |
159 | /* Section VMAs at the time the stash was built. */ |
160 | bfd_vma *sec_vma; | |
161 | ||
5609a71e | 162 | /* Number of sections whose VMA we must adjust. */ |
93ee1e36 | 163 | int adjusted_section_count; |
d4c32a81 | 164 | |
5609a71e DJ |
165 | /* Array of sections with adjusted VMA. */ |
166 | struct adjusted_section *adjusted_sections; | |
bd210d54 NC |
167 | |
168 | /* Number of times find_line is called. This is used in | |
169 | the heuristic for enabling the info hash tables. */ | |
170 | int info_hash_count; | |
171 | ||
172 | #define STASH_INFO_HASH_TRIGGER 100 | |
173 | ||
174 | /* Hash table mapping symbol names to function infos. */ | |
175 | struct info_hash_table *funcinfo_hash_table; | |
176 | ||
177 | /* Hash table mapping symbol names to variable infos. */ | |
178 | struct info_hash_table *varinfo_hash_table; | |
179 | ||
180 | /* Head of comp_unit list in the last hash table update. */ | |
181 | struct comp_unit *hash_units_head; | |
182 | ||
183 | /* Status of info hash. */ | |
184 | int info_hash_status; | |
185 | #define STASH_INFO_HASH_OFF 0 | |
186 | #define STASH_INFO_HASH_ON 1 | |
187 | #define STASH_INFO_HASH_DISABLED 2 | |
1c37913d AM |
188 | |
189 | /* True if we opened bfd_ptr. */ | |
190 | bfd_boolean close_on_cleanup; | |
252b5132 RH |
191 | }; |
192 | ||
a092b084 NC |
193 | struct arange |
194 | { | |
f623be2b RH |
195 | struct arange *next; |
196 | bfd_vma low; | |
197 | bfd_vma high; | |
198 | }; | |
252b5132 | 199 | |
252b5132 | 200 | /* A minimal decoding of DWARF2 compilation units. We only decode |
a092b084 | 201 | what's needed to get to the line number information. */ |
252b5132 | 202 | |
a092b084 NC |
203 | struct comp_unit |
204 | { | |
205 | /* Chain the previously read compilation units. */ | |
f075ee0c | 206 | struct comp_unit *next_unit; |
252b5132 | 207 | |
bd210d54 NC |
208 | /* Likewise, chain the compilation unit read after this one. |
209 | The comp units are stored in reversed reading order. */ | |
210 | struct comp_unit *prev_unit; | |
211 | ||
2ae727ad | 212 | /* Keep the bfd convenient (for memory allocation). */ |
f075ee0c | 213 | bfd *abfd; |
252b5132 | 214 | |
709d67f1 AM |
215 | /* The lowest and highest addresses contained in this compilation |
216 | unit as specified in the compilation unit header. */ | |
217 | struct arange arange; | |
252b5132 | 218 | |
a092b084 | 219 | /* The DW_AT_name attribute (for error messages). */ |
f075ee0c | 220 | char *name; |
252b5132 | 221 | |
a092b084 | 222 | /* The abbrev hash table. */ |
f075ee0c | 223 | struct abbrev_info **abbrevs; |
252b5132 | 224 | |
e00e8198 AM |
225 | /* DW_AT_language. */ |
226 | int lang; | |
227 | ||
a092b084 | 228 | /* Note that an error was found by comp_unit_find_nearest_line. */ |
252b5132 RH |
229 | int error; |
230 | ||
a092b084 | 231 | /* The DW_AT_comp_dir attribute. */ |
f075ee0c | 232 | char *comp_dir; |
252b5132 | 233 | |
b34976b6 | 234 | /* TRUE if there is a line number table associated with this comp. unit. */ |
252b5132 | 235 | int stmtlist; |
98591c73 | 236 | |
c0c28ab8 L |
237 | /* Pointer to the current comp_unit so that we can find a given entry |
238 | by its reference. */ | |
f075ee0c | 239 | bfd_byte *info_ptr_unit; |
c0c28ab8 | 240 | |
a358ecb8 AM |
241 | /* Pointer to the start of the debug section, for DW_FORM_ref_addr. */ |
242 | bfd_byte *sec_info_ptr; | |
243 | ||
a092b084 | 244 | /* The offset into .debug_line of the line number table. */ |
252b5132 RH |
245 | unsigned long line_offset; |
246 | ||
a092b084 | 247 | /* Pointer to the first child die for the comp unit. */ |
f075ee0c | 248 | bfd_byte *first_child_die_ptr; |
252b5132 | 249 | |
a092b084 | 250 | /* The end of the comp unit. */ |
f075ee0c | 251 | bfd_byte *end_ptr; |
252b5132 | 252 | |
a092b084 | 253 | /* The decoded line number, NULL if not yet decoded. */ |
f075ee0c | 254 | struct line_info_table *line_table; |
252b5132 | 255 | |
a092b084 | 256 | /* A list of the functions found in this comp. unit. */ |
f075ee0c | 257 | struct funcinfo *function_table; |
252b5132 | 258 | |
089e3718 IT |
259 | /* A table of function information references searchable by address. */ |
260 | struct lookup_funcinfo *lookup_funcinfo_table; | |
261 | ||
262 | /* Number of functions in the function_table and sorted_function_table. */ | |
263 | bfd_size_type number_of_functions; | |
264 | ||
5420f73d L |
265 | /* A list of the variables found in this comp. unit. */ |
266 | struct varinfo *variable_table; | |
267 | ||
d03ba2a1 JJ |
268 | /* Pointer to dwarf2_debug structure. */ |
269 | struct dwarf2_debug *stash; | |
270 | ||
5609a71e DJ |
271 | /* DWARF format version for this unit - from unit header. */ |
272 | int version; | |
273 | ||
a092b084 | 274 | /* Address size for this unit - from unit header. */ |
252b5132 | 275 | unsigned char addr_size; |
d03ba2a1 JJ |
276 | |
277 | /* Offset size for this unit - from unit header. */ | |
278 | unsigned char offset_size; | |
a13afe8e FF |
279 | |
280 | /* Base address for this unit - from DW_AT_low_pc attribute of | |
281 | DW_TAG_compile_unit DIE */ | |
282 | bfd_vma base_address; | |
bd210d54 NC |
283 | |
284 | /* TRUE if symbols are cached in hash table for faster lookup by name. */ | |
285 | bfd_boolean cached; | |
252b5132 RH |
286 | }; |
287 | ||
a7b97311 AM |
288 | /* This data structure holds the information of an abbrev. */ |
289 | struct abbrev_info | |
290 | { | |
291 | unsigned int number; /* Number identifying abbrev. */ | |
292 | enum dwarf_tag tag; /* DWARF tag. */ | |
293 | int has_children; /* Boolean. */ | |
294 | unsigned int num_attrs; /* Number of attributes. */ | |
295 | struct attr_abbrev *attrs; /* An array of attribute descriptions. */ | |
296 | struct abbrev_info *next; /* Next in chain. */ | |
297 | }; | |
298 | ||
299 | struct attr_abbrev | |
300 | { | |
301 | enum dwarf_attribute name; | |
302 | enum dwarf_form form; | |
303 | }; | |
304 | ||
4a114e3e L |
305 | /* Map of uncompressed DWARF debug section name to compressed one. It |
306 | is terminated by NULL uncompressed_name. */ | |
307 | ||
e4c93b56 | 308 | const struct dwarf_debug_section dwarf_debug_sections[] = |
4a114e3e L |
309 | { |
310 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
311 | { ".debug_aranges", ".zdebug_aranges" }, | |
312 | { ".debug_frame", ".zdebug_frame" }, | |
313 | { ".debug_info", ".zdebug_info" }, | |
95e34fb4 | 314 | { ".debug_info", ".zdebug_info" }, |
4a114e3e L |
315 | { ".debug_line", ".zdebug_line" }, |
316 | { ".debug_loc", ".zdebug_loc" }, | |
317 | { ".debug_macinfo", ".zdebug_macinfo" }, | |
4ccf1e31 | 318 | { ".debug_macro", ".zdebug_macro" }, |
4a114e3e L |
319 | { ".debug_pubnames", ".zdebug_pubnames" }, |
320 | { ".debug_pubtypes", ".zdebug_pubtypes" }, | |
321 | { ".debug_ranges", ".zdebug_ranges" }, | |
322 | { ".debug_static_func", ".zdebug_static_func" }, | |
323 | { ".debug_static_vars", ".zdebug_static_vars" }, | |
324 | { ".debug_str", ".zdebug_str", }, | |
95e34fb4 | 325 | { ".debug_str", ".zdebug_str", }, |
4a114e3e L |
326 | { ".debug_types", ".zdebug_types" }, |
327 | /* GNU DWARF 1 extensions */ | |
328 | { ".debug_sfnames", ".zdebug_sfnames" }, | |
329 | { ".debug_srcinfo", ".zebug_srcinfo" }, | |
330 | /* SGI/MIPS DWARF 2 extensions */ | |
331 | { ".debug_funcnames", ".zdebug_funcnames" }, | |
332 | { ".debug_typenames", ".zdebug_typenames" }, | |
333 | { ".debug_varnames", ".zdebug_varnames" }, | |
334 | { ".debug_weaknames", ".zdebug_weaknames" }, | |
335 | { NULL, NULL }, | |
336 | }; | |
337 | ||
95e34fb4 NC |
338 | /* NB/ Numbers in this enum must match up with indicies |
339 | into the dwarf_debug_sections[] array above. */ | |
4a114e3e L |
340 | enum dwarf_debug_section_enum |
341 | { | |
342 | debug_abbrev = 0, | |
343 | debug_aranges, | |
344 | debug_frame, | |
345 | debug_info, | |
95e34fb4 | 346 | debug_info_alt, |
4a114e3e L |
347 | debug_line, |
348 | debug_loc, | |
349 | debug_macinfo, | |
4ccf1e31 | 350 | debug_macro, |
4a114e3e L |
351 | debug_pubnames, |
352 | debug_pubtypes, | |
353 | debug_ranges, | |
354 | debug_static_func, | |
355 | debug_static_vars, | |
356 | debug_str, | |
95e34fb4 | 357 | debug_str_alt, |
4a114e3e L |
358 | debug_types, |
359 | debug_sfnames, | |
360 | debug_srcinfo, | |
361 | debug_funcnames, | |
362 | debug_typenames, | |
363 | debug_varnames, | |
364 | debug_weaknames | |
365 | }; | |
366 | ||
a7b97311 AM |
367 | #ifndef ABBREV_HASH_SIZE |
368 | #define ABBREV_HASH_SIZE 121 | |
369 | #endif | |
370 | #ifndef ATTR_ALLOC_CHUNK | |
371 | #define ATTR_ALLOC_CHUNK 4 | |
372 | #endif | |
373 | ||
bd210d54 NC |
374 | /* Variable and function hash tables. This is used to speed up look-up |
375 | in lookup_symbol_in_var_table() and lookup_symbol_in_function_table(). | |
376 | In order to share code between variable and function infos, we use | |
377 | a list of untyped pointer for all variable/function info associated with | |
378 | a symbol. We waste a bit of memory for list with one node but that | |
379 | simplifies the code. */ | |
380 | ||
381 | struct info_list_node | |
382 | { | |
383 | struct info_list_node *next; | |
384 | void *info; | |
385 | }; | |
386 | ||
387 | /* Info hash entry. */ | |
388 | struct info_hash_entry | |
389 | { | |
390 | struct bfd_hash_entry root; | |
391 | struct info_list_node *head; | |
392 | }; | |
393 | ||
394 | struct info_hash_table | |
395 | { | |
396 | struct bfd_hash_table base; | |
397 | }; | |
398 | ||
089e3718 | 399 | /* Function to create a new entry in info hash table. */ |
bd210d54 NC |
400 | |
401 | static struct bfd_hash_entry * | |
402 | info_hash_table_newfunc (struct bfd_hash_entry *entry, | |
403 | struct bfd_hash_table *table, | |
404 | const char *string) | |
405 | { | |
406 | struct info_hash_entry *ret = (struct info_hash_entry *) entry; | |
407 | ||
408 | /* Allocate the structure if it has not already been allocated by a | |
409 | derived class. */ | |
410 | if (ret == NULL) | |
411 | { | |
a50b1753 | 412 | ret = (struct info_hash_entry *) bfd_hash_allocate (table, |
93ee1e36 | 413 | sizeof (* ret)); |
bd210d54 NC |
414 | if (ret == NULL) |
415 | return NULL; | |
416 | } | |
417 | ||
418 | /* Call the allocation method of the base class. */ | |
419 | ret = ((struct info_hash_entry *) | |
2d47a72c | 420 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); |
bd210d54 NC |
421 | |
422 | /* Initialize the local fields here. */ | |
423 | if (ret) | |
424 | ret->head = NULL; | |
425 | ||
426 | return (struct bfd_hash_entry *) ret; | |
427 | } | |
428 | ||
429 | /* Function to create a new info hash table. It returns a pointer to the | |
430 | newly created table or NULL if there is any error. We need abfd | |
431 | solely for memory allocation. */ | |
432 | ||
433 | static struct info_hash_table * | |
434 | create_info_hash_table (bfd *abfd) | |
435 | { | |
436 | struct info_hash_table *hash_table; | |
437 | ||
a2a50954 AM |
438 | hash_table = ((struct info_hash_table *) |
439 | bfd_alloc (abfd, sizeof (struct info_hash_table))); | |
bd210d54 NC |
440 | if (!hash_table) |
441 | return hash_table; | |
442 | ||
443 | if (!bfd_hash_table_init (&hash_table->base, info_hash_table_newfunc, | |
444 | sizeof (struct info_hash_entry))) | |
445 | { | |
446 | bfd_release (abfd, hash_table); | |
447 | return NULL; | |
448 | } | |
449 | ||
450 | return hash_table; | |
451 | } | |
452 | ||
453 | /* Insert an info entry into an info hash table. We do not check of | |
454 | duplicate entries. Also, the caller need to guarantee that the | |
455 | right type of info in inserted as info is passed as a void* pointer. | |
456 | This function returns true if there is no error. */ | |
457 | ||
458 | static bfd_boolean | |
459 | insert_info_hash_table (struct info_hash_table *hash_table, | |
460 | const char *key, | |
461 | void *info, | |
462 | bfd_boolean copy_p) | |
463 | { | |
464 | struct info_hash_entry *entry; | |
465 | struct info_list_node *node; | |
466 | ||
467 | entry = (struct info_hash_entry*) bfd_hash_lookup (&hash_table->base, | |
468 | key, TRUE, copy_p); | |
469 | if (!entry) | |
470 | return FALSE; | |
471 | ||
a50b1753 | 472 | node = (struct info_list_node *) bfd_hash_allocate (&hash_table->base, |
93ee1e36 | 473 | sizeof (*node)); |
bd210d54 NC |
474 | if (!node) |
475 | return FALSE; | |
476 | ||
477 | node->info = info; | |
478 | node->next = entry->head; | |
479 | entry->head = node; | |
480 | ||
481 | return TRUE; | |
482 | } | |
483 | ||
484 | /* Look up an info entry list from an info hash table. Return NULL | |
089e3718 | 485 | if there is none. */ |
bd210d54 NC |
486 | |
487 | static struct info_list_node * | |
488 | lookup_info_hash_table (struct info_hash_table *hash_table, const char *key) | |
489 | { | |
490 | struct info_hash_entry *entry; | |
491 | ||
492 | entry = (struct info_hash_entry*) bfd_hash_lookup (&hash_table->base, key, | |
493 | FALSE, FALSE); | |
494 | return entry ? entry->head : NULL; | |
495 | } | |
496 | ||
1b315056 | 497 | /* Read a section into its appropriate place in the dwarf2_debug |
dc80fd5c | 498 | struct (indicated by SECTION_BUFFER and SECTION_SIZE). If SYMS is |
1b315056 | 499 | not NULL, use bfd_simple_get_relocated_section_contents to read the |
dc80fd5c NC |
500 | section contents, otherwise use bfd_get_section_contents. Fail if |
501 | the located section does not contain at least OFFSET bytes. */ | |
1b315056 CS |
502 | |
503 | static bfd_boolean | |
dc80fd5c | 504 | read_section (bfd * abfd, |
fc28f9aa | 505 | const struct dwarf_debug_section *sec, |
dc80fd5c NC |
506 | asymbol ** syms, |
507 | bfd_uint64_t offset, | |
508 | bfd_byte ** section_buffer, | |
509 | bfd_size_type * section_size) | |
1b315056 CS |
510 | { |
511 | asection *msec; | |
fc28f9aa | 512 | const char *section_name = sec->uncompressed_name; |
1b315056 | 513 | |
95e34fb4 NC |
514 | /* The section may have already been read. */ |
515 | if (*section_buffer == NULL) | |
1b315056 | 516 | { |
53638231 | 517 | msec = bfd_get_section_by_name (abfd, section_name); |
4a114e3e | 518 | if (! msec) |
53638231 | 519 | { |
fc28f9aa | 520 | section_name = sec->compressed_name; |
93ee1e36 AM |
521 | if (section_name != NULL) |
522 | msec = bfd_get_section_by_name (abfd, section_name); | |
53638231 AS |
523 | } |
524 | if (! msec) | |
2d47a72c | 525 | { |
4eca0228 AM |
526 | _bfd_error_handler (_("Dwarf Error: Can't find %s section."), |
527 | sec->uncompressed_name); | |
2d47a72c DJ |
528 | bfd_set_error (bfd_error_bad_value); |
529 | return FALSE; | |
530 | } | |
53638231 | 531 | |
bc664799 | 532 | *section_size = msec->rawsize ? msec->rawsize : msec->size; |
8c2ccebd CC |
533 | if (syms) |
534 | { | |
535 | *section_buffer | |
a2a50954 | 536 | = bfd_simple_get_relocated_section_contents (abfd, msec, NULL, syms); |
8c2ccebd CC |
537 | if (! *section_buffer) |
538 | return FALSE; | |
539 | } | |
540 | else | |
541 | { | |
542 | *section_buffer = (bfd_byte *) bfd_malloc (*section_size); | |
543 | if (! *section_buffer) | |
544 | return FALSE; | |
545 | if (! bfd_get_section_contents (abfd, msec, *section_buffer, | |
546 | 0, *section_size)) | |
547 | return FALSE; | |
548 | } | |
1b315056 CS |
549 | } |
550 | ||
551 | /* It is possible to get a bad value for the offset into the section | |
dc80fd5c | 552 | that the client wants. Validate it here to avoid trouble later. */ |
1b315056 CS |
553 | if (offset != 0 && offset >= *section_size) |
554 | { | |
695344c0 | 555 | /* xgettext: c-format */ |
4eca0228 AM |
556 | _bfd_error_handler (_("Dwarf Error: Offset (%lu)" |
557 | " greater than or equal to %s size (%lu)."), | |
558 | (long) offset, section_name, *section_size); | |
1b315056 CS |
559 | bfd_set_error (bfd_error_bad_value); |
560 | return FALSE; | |
561 | } | |
562 | ||
563 | return TRUE; | |
564 | } | |
565 | ||
a092b084 | 566 | /* Read dwarf information from a buffer. */ |
252b5132 RH |
567 | |
568 | static unsigned int | |
dbb3fbbb | 569 | read_1_byte (bfd *abfd ATTRIBUTE_UNUSED, bfd_byte *buf, bfd_byte *end) |
252b5132 | 570 | { |
dbb3fbbb NC |
571 | if (buf + 1 > end) |
572 | return 0; | |
818a27ac | 573 | return bfd_get_8 (abfd, buf); |
252b5132 RH |
574 | } |
575 | ||
576 | static int | |
dbb3fbbb | 577 | read_1_signed_byte (bfd *abfd ATTRIBUTE_UNUSED, bfd_byte *buf, bfd_byte *end) |
252b5132 | 578 | { |
dbb3fbbb NC |
579 | if (buf + 1 > end) |
580 | return 0; | |
818a27ac | 581 | return bfd_get_signed_8 (abfd, buf); |
252b5132 RH |
582 | } |
583 | ||
584 | static unsigned int | |
dbb3fbbb | 585 | read_2_bytes (bfd *abfd, bfd_byte *buf, bfd_byte *end) |
252b5132 | 586 | { |
dbb3fbbb NC |
587 | if (buf + 2 > end) |
588 | return 0; | |
818a27ac | 589 | return bfd_get_16 (abfd, buf); |
252b5132 RH |
590 | } |
591 | ||
252b5132 | 592 | static unsigned int |
dbb3fbbb | 593 | read_4_bytes (bfd *abfd, bfd_byte *buf, bfd_byte *end) |
252b5132 | 594 | { |
dbb3fbbb NC |
595 | if (buf + 4 > end) |
596 | return 0; | |
818a27ac | 597 | return bfd_get_32 (abfd, buf); |
252b5132 RH |
598 | } |
599 | ||
8ce8c090 | 600 | static bfd_uint64_t |
dbb3fbbb | 601 | read_8_bytes (bfd *abfd, bfd_byte *buf, bfd_byte *end) |
252b5132 | 602 | { |
dbb3fbbb NC |
603 | if (buf + 8 > end) |
604 | return 0; | |
818a27ac | 605 | return bfd_get_64 (abfd, buf); |
252b5132 RH |
606 | } |
607 | ||
f075ee0c | 608 | static bfd_byte * |
818a27ac | 609 | read_n_bytes (bfd *abfd ATTRIBUTE_UNUSED, |
f075ee0c | 610 | bfd_byte *buf, |
dbb3fbbb | 611 | bfd_byte *end, |
818a27ac | 612 | unsigned int size ATTRIBUTE_UNUSED) |
252b5132 | 613 | { |
dbb3fbbb NC |
614 | if (buf + size > end) |
615 | return NULL; | |
252b5132 RH |
616 | return buf; |
617 | } | |
618 | ||
dbb3fbbb NC |
619 | /* Scans a NUL terminated string starting at BUF, returning a pointer to it. |
620 | Returns the number of characters in the string, *including* the NUL byte, | |
621 | in BYTES_READ_PTR. This value is set even if the function fails. Bytes | |
622 | at or beyond BUF_END will not be read. Returns NULL if there was a | |
623 | problem, or if the string is empty. */ | |
624 | ||
252b5132 | 625 | static char * |
dbb3fbbb NC |
626 | read_string (bfd * abfd ATTRIBUTE_UNUSED, |
627 | bfd_byte * buf, | |
628 | bfd_byte * buf_end, | |
629 | unsigned int * bytes_read_ptr) | |
252b5132 | 630 | { |
dbb3fbbb NC |
631 | bfd_byte *str = buf; |
632 | ||
633 | if (buf >= buf_end) | |
634 | { | |
635 | * bytes_read_ptr = 0; | |
636 | return NULL; | |
637 | } | |
dc80fd5c | 638 | |
f075ee0c | 639 | if (*str == '\0') |
252b5132 | 640 | { |
dbb3fbbb | 641 | * bytes_read_ptr = 1; |
252b5132 RH |
642 | return NULL; |
643 | } | |
98591c73 | 644 | |
dbb3fbbb NC |
645 | while (buf < buf_end) |
646 | if (* buf ++ == 0) | |
647 | { | |
648 | * bytes_read_ptr = buf - str; | |
649 | return (char *) str; | |
650 | } | |
651 | ||
652 | * bytes_read_ptr = buf - str; | |
653 | return NULL; | |
252b5132 RH |
654 | } |
655 | ||
dbb3fbbb NC |
656 | /* Reads an offset from BUF and then locates the string at this offset |
657 | inside the debug string section. Returns a pointer to the string. | |
658 | Returns the number of bytes read from BUF, *not* the length of the string, | |
659 | in BYTES_READ_PTR. This value is set even if the function fails. Bytes | |
660 | at or beyond BUF_END will not be read from BUF. Returns NULL if there was | |
661 | a problem, or if the string is empty. Does not check for NUL termination | |
662 | of the string. */ | |
dc80fd5c | 663 | |
d03ba2a1 | 664 | static char * |
dc80fd5c NC |
665 | read_indirect_string (struct comp_unit * unit, |
666 | bfd_byte * buf, | |
dbb3fbbb | 667 | bfd_byte * buf_end, |
dc80fd5c | 668 | unsigned int * bytes_read_ptr) |
d03ba2a1 | 669 | { |
8ce8c090 | 670 | bfd_uint64_t offset; |
d03ba2a1 | 671 | struct dwarf2_debug *stash = unit->stash; |
f075ee0c | 672 | char *str; |
d03ba2a1 | 673 | |
dbb3fbbb NC |
674 | if (buf + unit->offset_size > buf_end) |
675 | { | |
676 | * bytes_read_ptr = 0; | |
677 | return NULL; | |
678 | } | |
62f8d217 | 679 | |
d03ba2a1 | 680 | if (unit->offset_size == 4) |
dbb3fbbb | 681 | offset = read_4_bytes (unit->abfd, buf, buf_end); |
d03ba2a1 | 682 | else |
dbb3fbbb | 683 | offset = read_8_bytes (unit->abfd, buf, buf_end); |
dc80fd5c | 684 | |
d03ba2a1 JJ |
685 | *bytes_read_ptr = unit->offset_size; |
686 | ||
fc28f9aa | 687 | if (! read_section (unit->abfd, &stash->debug_sections[debug_str], |
93ee1e36 | 688 | stash->syms, offset, |
9e32b19f | 689 | &stash->dwarf_str_buffer, &stash->dwarf_str_size)) |
dc80fd5c | 690 | return NULL; |
d03ba2a1 | 691 | |
dbb3fbbb NC |
692 | if (offset >= stash->dwarf_str_size) |
693 | return NULL; | |
f075ee0c AM |
694 | str = (char *) stash->dwarf_str_buffer + offset; |
695 | if (*str == '\0') | |
d03ba2a1 | 696 | return NULL; |
f075ee0c | 697 | return str; |
d03ba2a1 JJ |
698 | } |
699 | ||
95e34fb4 | 700 | /* Like read_indirect_string but uses a .debug_str located in |
93ee1e36 | 701 | an alternate file pointed to by the .gnu_debugaltlink section. |
95e34fb4 NC |
702 | Used to impement DW_FORM_GNU_strp_alt. */ |
703 | ||
704 | static char * | |
705 | read_alt_indirect_string (struct comp_unit * unit, | |
706 | bfd_byte * buf, | |
dbb3fbbb | 707 | bfd_byte * buf_end, |
95e34fb4 NC |
708 | unsigned int * bytes_read_ptr) |
709 | { | |
710 | bfd_uint64_t offset; | |
711 | struct dwarf2_debug *stash = unit->stash; | |
712 | char *str; | |
713 | ||
dbb3fbbb NC |
714 | if (buf + unit->offset_size > buf_end) |
715 | { | |
716 | * bytes_read_ptr = 0; | |
717 | return NULL; | |
718 | } | |
62f8d217 | 719 | |
95e34fb4 | 720 | if (unit->offset_size == 4) |
dbb3fbbb | 721 | offset = read_4_bytes (unit->abfd, buf, buf_end); |
95e34fb4 | 722 | else |
dbb3fbbb | 723 | offset = read_8_bytes (unit->abfd, buf, buf_end); |
95e34fb4 NC |
724 | |
725 | *bytes_read_ptr = unit->offset_size; | |
726 | ||
727 | if (stash->alt_bfd_ptr == NULL) | |
728 | { | |
729 | bfd * debug_bfd; | |
730 | char * debug_filename = bfd_follow_gnu_debugaltlink (unit->abfd, DEBUGDIR); | |
731 | ||
732 | if (debug_filename == NULL) | |
733 | return NULL; | |
734 | ||
735 | if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL | |
736 | || ! bfd_check_format (debug_bfd, bfd_object)) | |
737 | { | |
738 | if (debug_bfd) | |
739 | bfd_close (debug_bfd); | |
740 | ||
741 | /* FIXME: Should we report our failure to follow the debuglink ? */ | |
742 | free (debug_filename); | |
743 | return NULL; | |
744 | } | |
745 | stash->alt_bfd_ptr = debug_bfd; | |
746 | } | |
62f8d217 | 747 | |
95e34fb4 NC |
748 | if (! read_section (unit->stash->alt_bfd_ptr, |
749 | stash->debug_sections + debug_str_alt, | |
750 | NULL, /* FIXME: Do we need to load alternate symbols ? */ | |
751 | offset, | |
752 | &stash->alt_dwarf_str_buffer, | |
753 | &stash->alt_dwarf_str_size)) | |
754 | return NULL; | |
755 | ||
dbb3fbbb NC |
756 | if (offset >= stash->alt_dwarf_str_size) |
757 | return NULL; | |
95e34fb4 NC |
758 | str = (char *) stash->alt_dwarf_str_buffer + offset; |
759 | if (*str == '\0') | |
760 | return NULL; | |
761 | ||
762 | return str; | |
763 | } | |
764 | ||
765 | /* Resolve an alternate reference from UNIT at OFFSET. | |
766 | Returns a pointer into the loaded alternate CU upon success | |
767 | or NULL upon failure. */ | |
768 | ||
769 | static bfd_byte * | |
770 | read_alt_indirect_ref (struct comp_unit * unit, | |
771 | bfd_uint64_t offset) | |
772 | { | |
773 | struct dwarf2_debug *stash = unit->stash; | |
774 | ||
775 | if (stash->alt_bfd_ptr == NULL) | |
776 | { | |
777 | bfd * debug_bfd; | |
778 | char * debug_filename = bfd_follow_gnu_debugaltlink (unit->abfd, DEBUGDIR); | |
779 | ||
780 | if (debug_filename == NULL) | |
781 | return FALSE; | |
782 | ||
783 | if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL | |
784 | || ! bfd_check_format (debug_bfd, bfd_object)) | |
785 | { | |
786 | if (debug_bfd) | |
787 | bfd_close (debug_bfd); | |
788 | ||
789 | /* FIXME: Should we report our failure to follow the debuglink ? */ | |
790 | free (debug_filename); | |
791 | return NULL; | |
792 | } | |
793 | stash->alt_bfd_ptr = debug_bfd; | |
794 | } | |
62f8d217 | 795 | |
95e34fb4 NC |
796 | if (! read_section (unit->stash->alt_bfd_ptr, |
797 | stash->debug_sections + debug_info_alt, | |
798 | NULL, /* FIXME: Do we need to load alternate symbols ? */ | |
799 | offset, | |
800 | &stash->alt_dwarf_info_buffer, | |
801 | &stash->alt_dwarf_info_size)) | |
802 | return NULL; | |
803 | ||
dbb3fbbb NC |
804 | if (offset >= stash->alt_dwarf_info_size) |
805 | return NULL; | |
95e34fb4 NC |
806 | return stash->alt_dwarf_info_buffer + offset; |
807 | } | |
808 | ||
8ce8c090 | 809 | static bfd_uint64_t |
dbb3fbbb | 810 | read_address (struct comp_unit *unit, bfd_byte *buf, bfd_byte * buf_end) |
252b5132 | 811 | { |
fa15f18d AM |
812 | int signed_vma = 0; |
813 | ||
814 | if (bfd_get_flavour (unit->abfd) == bfd_target_elf_flavour) | |
815 | signed_vma = get_elf_backend_data (unit->abfd)->sign_extend_vma; | |
0af4cd7c | 816 | |
dbb3fbbb NC |
817 | if (buf + unit->addr_size > buf_end) |
818 | return 0; | |
819 | ||
0af4cd7c PK |
820 | if (signed_vma) |
821 | { | |
822 | switch (unit->addr_size) | |
823 | { | |
824 | case 8: | |
825 | return bfd_get_signed_64 (unit->abfd, buf); | |
826 | case 4: | |
827 | return bfd_get_signed_32 (unit->abfd, buf); | |
828 | case 2: | |
829 | return bfd_get_signed_16 (unit->abfd, buf); | |
830 | default: | |
831 | abort (); | |
832 | } | |
833 | } | |
834 | else | |
252b5132 | 835 | { |
0af4cd7c PK |
836 | switch (unit->addr_size) |
837 | { | |
838 | case 8: | |
839 | return bfd_get_64 (unit->abfd, buf); | |
840 | case 4: | |
841 | return bfd_get_32 (unit->abfd, buf); | |
842 | case 2: | |
843 | return bfd_get_16 (unit->abfd, buf); | |
844 | default: | |
845 | abort (); | |
846 | } | |
252b5132 | 847 | } |
252b5132 RH |
848 | } |
849 | ||
252b5132 RH |
850 | /* Lookup an abbrev_info structure in the abbrev hash table. */ |
851 | ||
852 | static struct abbrev_info * | |
818a27ac | 853 | lookup_abbrev (unsigned int number, struct abbrev_info **abbrevs) |
252b5132 RH |
854 | { |
855 | unsigned int hash_number; | |
856 | struct abbrev_info *abbrev; | |
857 | ||
858 | hash_number = number % ABBREV_HASH_SIZE; | |
859 | abbrev = abbrevs[hash_number]; | |
860 | ||
861 | while (abbrev) | |
862 | { | |
863 | if (abbrev->number == number) | |
864 | return abbrev; | |
865 | else | |
866 | abbrev = abbrev->next; | |
867 | } | |
98591c73 | 868 | |
252b5132 RH |
869 | return NULL; |
870 | } | |
871 | ||
872 | /* In DWARF version 2, the description of the debugging information is | |
873 | stored in a separate .debug_abbrev section. Before we read any | |
874 | dies from a section we read in all abbreviations and install them | |
875 | in a hash table. */ | |
876 | ||
877 | static struct abbrev_info** | |
8ce8c090 | 878 | read_abbrevs (bfd *abfd, bfd_uint64_t offset, struct dwarf2_debug *stash) |
252b5132 RH |
879 | { |
880 | struct abbrev_info **abbrevs; | |
f075ee0c | 881 | bfd_byte *abbrev_ptr; |
dbb3fbbb | 882 | bfd_byte *abbrev_end; |
252b5132 RH |
883 | struct abbrev_info *cur_abbrev; |
884 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
885 | unsigned int abbrev_form, hash_number; | |
dc810e39 | 886 | bfd_size_type amt; |
252b5132 | 887 | |
fc28f9aa | 888 | if (! read_section (abfd, &stash->debug_sections[debug_abbrev], |
93ee1e36 | 889 | stash->syms, offset, |
9e32b19f | 890 | &stash->dwarf_abbrev_buffer, &stash->dwarf_abbrev_size)) |
8af6b354 | 891 | return NULL; |
252b5132 | 892 | |
dbb3fbbb NC |
893 | if (offset >= stash->dwarf_abbrev_size) |
894 | return NULL; | |
895 | ||
dc810e39 | 896 | amt = sizeof (struct abbrev_info*) * ABBREV_HASH_SIZE; |
a50b1753 | 897 | abbrevs = (struct abbrev_info **) bfd_zalloc (abfd, amt); |
8af6b354 AM |
898 | if (abbrevs == NULL) |
899 | return NULL; | |
252b5132 RH |
900 | |
901 | abbrev_ptr = stash->dwarf_abbrev_buffer + offset; | |
dbb3fbbb NC |
902 | abbrev_end = stash->dwarf_abbrev_buffer + stash->dwarf_abbrev_size; |
903 | abbrev_number = safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end); | |
252b5132 RH |
904 | abbrev_ptr += bytes_read; |
905 | ||
a092b084 | 906 | /* Loop until we reach an abbrev number of 0. */ |
252b5132 RH |
907 | while (abbrev_number) |
908 | { | |
dc810e39 | 909 | amt = sizeof (struct abbrev_info); |
a50b1753 | 910 | cur_abbrev = (struct abbrev_info *) bfd_zalloc (abfd, amt); |
8af6b354 AM |
911 | if (cur_abbrev == NULL) |
912 | return NULL; | |
252b5132 | 913 | |
a092b084 | 914 | /* Read in abbrev header. */ |
252b5132 | 915 | cur_abbrev->number = abbrev_number; |
d45913a0 | 916 | cur_abbrev->tag = (enum dwarf_tag) |
dbb3fbbb | 917 | safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end); |
252b5132 | 918 | abbrev_ptr += bytes_read; |
dbb3fbbb | 919 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr, abbrev_end); |
252b5132 RH |
920 | abbrev_ptr += 1; |
921 | ||
a092b084 | 922 | /* Now read in declarations. */ |
dbb3fbbb | 923 | abbrev_name = safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end); |
252b5132 | 924 | abbrev_ptr += bytes_read; |
dbb3fbbb | 925 | abbrev_form = safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end); |
252b5132 | 926 | abbrev_ptr += bytes_read; |
98591c73 | 927 | |
252b5132 RH |
928 | while (abbrev_name) |
929 | { | |
930 | if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0) | |
931 | { | |
35330cce NC |
932 | struct attr_abbrev *tmp; |
933 | ||
dc810e39 AM |
934 | amt = cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK; |
935 | amt *= sizeof (struct attr_abbrev); | |
a50b1753 | 936 | tmp = (struct attr_abbrev *) bfd_realloc (cur_abbrev->attrs, amt); |
35330cce | 937 | if (tmp == NULL) |
d8d1c398 AM |
938 | { |
939 | size_t i; | |
940 | ||
941 | for (i = 0; i < ABBREV_HASH_SIZE; i++) | |
942 | { | |
943 | struct abbrev_info *abbrev = abbrevs[i]; | |
944 | ||
945 | while (abbrev) | |
946 | { | |
34b5e0b2 NC |
947 | free (abbrev->attrs); |
948 | abbrev = abbrev->next; | |
d8d1c398 AM |
949 | } |
950 | } | |
951 | return NULL; | |
952 | } | |
35330cce | 953 | cur_abbrev->attrs = tmp; |
252b5132 | 954 | } |
98591c73 | 955 | |
d45913a0 DA |
956 | cur_abbrev->attrs[cur_abbrev->num_attrs].name |
957 | = (enum dwarf_attribute) abbrev_name; | |
958 | cur_abbrev->attrs[cur_abbrev->num_attrs++].form | |
959 | = (enum dwarf_form) abbrev_form; | |
dbb3fbbb | 960 | abbrev_name = safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end); |
252b5132 | 961 | abbrev_ptr += bytes_read; |
dbb3fbbb | 962 | abbrev_form = safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end); |
252b5132 RH |
963 | abbrev_ptr += bytes_read; |
964 | } | |
965 | ||
966 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
967 | cur_abbrev->next = abbrevs[hash_number]; | |
968 | abbrevs[hash_number] = cur_abbrev; | |
969 | ||
970 | /* Get next abbreviation. | |
e82ce529 | 971 | Under Irix6 the abbreviations for a compilation unit are not |
252b5132 RH |
972 | always properly terminated with an abbrev number of 0. |
973 | Exit loop if we encounter an abbreviation which we have | |
974 | already read (which means we are about to read the abbreviations | |
975 | for the next compile unit) or if the end of the abbreviation | |
976 | table is reached. */ | |
977 | if ((unsigned int) (abbrev_ptr - stash->dwarf_abbrev_buffer) | |
d8d1c398 | 978 | >= stash->dwarf_abbrev_size) |
252b5132 | 979 | break; |
dbb3fbbb | 980 | abbrev_number = safe_read_leb128 (abfd, abbrev_ptr, &bytes_read, FALSE, abbrev_end); |
252b5132 | 981 | abbrev_ptr += bytes_read; |
dbb3fbbb | 982 | if (lookup_abbrev (abbrev_number, abbrevs) != NULL) |
252b5132 RH |
983 | break; |
984 | } | |
985 | ||
986 | return abbrevs; | |
987 | } | |
988 | ||
60d77146 NC |
989 | /* Returns true if the form is one which has a string value. */ |
990 | ||
991 | static inline bfd_boolean | |
992 | is_str_attr (enum dwarf_form form) | |
993 | { | |
994 | return form == DW_FORM_string || form == DW_FORM_strp || form == DW_FORM_GNU_strp_alt; | |
995 | } | |
996 | ||
dbb3fbbb NC |
997 | /* Read and fill in the value of attribute ATTR as described by FORM. |
998 | Read data starting from INFO_PTR, but never at or beyond INFO_PTR_END. | |
999 | Returns an updated INFO_PTR taking into account the amount of data read. */ | |
252b5132 | 1000 | |
f075ee0c | 1001 | static bfd_byte * |
dbb3fbbb NC |
1002 | read_attribute_value (struct attribute * attr, |
1003 | unsigned form, | |
1004 | struct comp_unit * unit, | |
1005 | bfd_byte * info_ptr, | |
1006 | bfd_byte * info_ptr_end) | |
252b5132 RH |
1007 | { |
1008 | bfd *abfd = unit->abfd; | |
1009 | unsigned int bytes_read; | |
1010 | struct dwarf_block *blk; | |
dc810e39 | 1011 | bfd_size_type amt; |
252b5132 | 1012 | |
a97fbc7e | 1013 | if (info_ptr >= info_ptr_end && form != DW_FORM_flag_present) |
dbb3fbbb | 1014 | { |
4eca0228 | 1015 | _bfd_error_handler (_("Dwarf Error: Info pointer extends beyond end of attributes")); |
dbb3fbbb NC |
1016 | bfd_set_error (bfd_error_bad_value); |
1017 | return info_ptr; | |
1018 | } | |
1019 | ||
d45913a0 | 1020 | attr->form = (enum dwarf_form) form; |
98591c73 | 1021 | |
cf716c56 | 1022 | switch (form) |
252b5132 | 1023 | { |
252b5132 | 1024 | case DW_FORM_ref_addr: |
5609a71e DJ |
1025 | /* DW_FORM_ref_addr is an address in DWARF2, and an offset in |
1026 | DWARF3. */ | |
c07cbdd7 | 1027 | if (unit->version == 3 || unit->version == 4) |
5609a71e DJ |
1028 | { |
1029 | if (unit->offset_size == 4) | |
dbb3fbbb | 1030 | attr->u.val = read_4_bytes (unit->abfd, info_ptr, info_ptr_end); |
5609a71e | 1031 | else |
dbb3fbbb | 1032 | attr->u.val = read_8_bytes (unit->abfd, info_ptr, info_ptr_end); |
5609a71e DJ |
1033 | info_ptr += unit->offset_size; |
1034 | break; | |
1035 | } | |
1036 | /* FALLTHROUGH */ | |
1037 | case DW_FORM_addr: | |
dbb3fbbb | 1038 | attr->u.val = read_address (unit, info_ptr, info_ptr_end); |
252b5132 RH |
1039 | info_ptr += unit->addr_size; |
1040 | break; | |
95e34fb4 | 1041 | case DW_FORM_GNU_ref_alt: |
c07cbdd7 JJ |
1042 | case DW_FORM_sec_offset: |
1043 | if (unit->offset_size == 4) | |
dbb3fbbb | 1044 | attr->u.val = read_4_bytes (unit->abfd, info_ptr, info_ptr_end); |
c07cbdd7 | 1045 | else |
dbb3fbbb | 1046 | attr->u.val = read_8_bytes (unit->abfd, info_ptr, info_ptr_end); |
c07cbdd7 JJ |
1047 | info_ptr += unit->offset_size; |
1048 | break; | |
252b5132 | 1049 | case DW_FORM_block2: |
dc810e39 | 1050 | amt = sizeof (struct dwarf_block); |
a50b1753 | 1051 | blk = (struct dwarf_block *) bfd_alloc (abfd, amt); |
8af6b354 AM |
1052 | if (blk == NULL) |
1053 | return NULL; | |
dbb3fbbb | 1054 | blk->size = read_2_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 | 1055 | info_ptr += 2; |
dbb3fbbb | 1056 | blk->data = read_n_bytes (abfd, info_ptr, info_ptr_end, blk->size); |
252b5132 | 1057 | info_ptr += blk->size; |
482e2e37 | 1058 | attr->u.blk = blk; |
252b5132 RH |
1059 | break; |
1060 | case DW_FORM_block4: | |
dc810e39 | 1061 | amt = sizeof (struct dwarf_block); |
a50b1753 | 1062 | blk = (struct dwarf_block *) bfd_alloc (abfd, amt); |
8af6b354 AM |
1063 | if (blk == NULL) |
1064 | return NULL; | |
dbb3fbbb | 1065 | blk->size = read_4_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 | 1066 | info_ptr += 4; |
dbb3fbbb | 1067 | blk->data = read_n_bytes (abfd, info_ptr, info_ptr_end, blk->size); |
252b5132 | 1068 | info_ptr += blk->size; |
482e2e37 | 1069 | attr->u.blk = blk; |
252b5132 RH |
1070 | break; |
1071 | case DW_FORM_data2: | |
dbb3fbbb | 1072 | attr->u.val = read_2_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1073 | info_ptr += 2; |
1074 | break; | |
1075 | case DW_FORM_data4: | |
dbb3fbbb | 1076 | attr->u.val = read_4_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1077 | info_ptr += 4; |
1078 | break; | |
1079 | case DW_FORM_data8: | |
dbb3fbbb | 1080 | attr->u.val = read_8_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1081 | info_ptr += 8; |
1082 | break; | |
1083 | case DW_FORM_string: | |
dbb3fbbb | 1084 | attr->u.str = read_string (abfd, info_ptr, info_ptr_end, &bytes_read); |
252b5132 RH |
1085 | info_ptr += bytes_read; |
1086 | break; | |
d03ba2a1 | 1087 | case DW_FORM_strp: |
dbb3fbbb | 1088 | attr->u.str = read_indirect_string (unit, info_ptr, info_ptr_end, &bytes_read); |
d03ba2a1 JJ |
1089 | info_ptr += bytes_read; |
1090 | break; | |
95e34fb4 | 1091 | case DW_FORM_GNU_strp_alt: |
dbb3fbbb | 1092 | attr->u.str = read_alt_indirect_string (unit, info_ptr, info_ptr_end, &bytes_read); |
95e34fb4 NC |
1093 | info_ptr += bytes_read; |
1094 | break; | |
c07cbdd7 | 1095 | case DW_FORM_exprloc: |
252b5132 | 1096 | case DW_FORM_block: |
dc810e39 | 1097 | amt = sizeof (struct dwarf_block); |
a50b1753 | 1098 | blk = (struct dwarf_block *) bfd_alloc (abfd, amt); |
8af6b354 AM |
1099 | if (blk == NULL) |
1100 | return NULL; | |
dbb3fbbb | 1101 | blk->size = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, info_ptr_end); |
252b5132 | 1102 | info_ptr += bytes_read; |
dbb3fbbb | 1103 | blk->data = read_n_bytes (abfd, info_ptr, info_ptr_end, blk->size); |
252b5132 | 1104 | info_ptr += blk->size; |
482e2e37 | 1105 | attr->u.blk = blk; |
252b5132 RH |
1106 | break; |
1107 | case DW_FORM_block1: | |
dc810e39 | 1108 | amt = sizeof (struct dwarf_block); |
a50b1753 | 1109 | blk = (struct dwarf_block *) bfd_alloc (abfd, amt); |
8af6b354 AM |
1110 | if (blk == NULL) |
1111 | return NULL; | |
dbb3fbbb | 1112 | blk->size = read_1_byte (abfd, info_ptr, info_ptr_end); |
252b5132 | 1113 | info_ptr += 1; |
dbb3fbbb | 1114 | blk->data = read_n_bytes (abfd, info_ptr, info_ptr_end, blk->size); |
252b5132 | 1115 | info_ptr += blk->size; |
482e2e37 | 1116 | attr->u.blk = blk; |
252b5132 RH |
1117 | break; |
1118 | case DW_FORM_data1: | |
dbb3fbbb | 1119 | attr->u.val = read_1_byte (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1120 | info_ptr += 1; |
1121 | break; | |
1122 | case DW_FORM_flag: | |
dbb3fbbb | 1123 | attr->u.val = read_1_byte (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1124 | info_ptr += 1; |
1125 | break; | |
c07cbdd7 JJ |
1126 | case DW_FORM_flag_present: |
1127 | attr->u.val = 1; | |
1128 | break; | |
252b5132 | 1129 | case DW_FORM_sdata: |
dbb3fbbb | 1130 | attr->u.sval = safe_read_leb128 (abfd, info_ptr, &bytes_read, TRUE, info_ptr_end); |
252b5132 RH |
1131 | info_ptr += bytes_read; |
1132 | break; | |
1133 | case DW_FORM_udata: | |
dbb3fbbb | 1134 | attr->u.val = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, info_ptr_end); |
252b5132 RH |
1135 | info_ptr += bytes_read; |
1136 | break; | |
1137 | case DW_FORM_ref1: | |
dbb3fbbb | 1138 | attr->u.val = read_1_byte (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1139 | info_ptr += 1; |
1140 | break; | |
1141 | case DW_FORM_ref2: | |
dbb3fbbb | 1142 | attr->u.val = read_2_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1143 | info_ptr += 2; |
1144 | break; | |
1145 | case DW_FORM_ref4: | |
dbb3fbbb | 1146 | attr->u.val = read_4_bytes (abfd, info_ptr, info_ptr_end); |
252b5132 RH |
1147 | info_ptr += 4; |
1148 | break; | |
81edd86d | 1149 | case DW_FORM_ref8: |
dbb3fbbb | 1150 | attr->u.val = read_8_bytes (abfd, info_ptr, info_ptr_end); |
81edd86d MM |
1151 | info_ptr += 8; |
1152 | break; | |
a37a68dd | 1153 | case DW_FORM_ref_sig8: |
dbb3fbbb | 1154 | attr->u.val = read_8_bytes (abfd, info_ptr, info_ptr_end); |
a37a68dd CC |
1155 | info_ptr += 8; |
1156 | break; | |
252b5132 | 1157 | case DW_FORM_ref_udata: |
dbb3fbbb | 1158 | attr->u.val = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, info_ptr_end); |
252b5132 RH |
1159 | info_ptr += bytes_read; |
1160 | break; | |
252b5132 | 1161 | case DW_FORM_indirect: |
dbb3fbbb | 1162 | form = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, info_ptr_end); |
cf716c56 | 1163 | info_ptr += bytes_read; |
dbb3fbbb | 1164 | info_ptr = read_attribute_value (attr, form, unit, info_ptr, info_ptr_end); |
cf716c56 | 1165 | break; |
252b5132 | 1166 | default: |
4eca0228 AM |
1167 | _bfd_error_handler (_("Dwarf Error: Invalid or unhandled FORM value: %#x."), |
1168 | form); | |
252b5132 | 1169 | bfd_set_error (bfd_error_bad_value); |
c07cbdd7 | 1170 | return NULL; |
252b5132 RH |
1171 | } |
1172 | return info_ptr; | |
1173 | } | |
1174 | ||
cf716c56 RH |
1175 | /* Read an attribute described by an abbreviated attribute. */ |
1176 | ||
f075ee0c | 1177 | static bfd_byte * |
dbb3fbbb NC |
1178 | read_attribute (struct attribute * attr, |
1179 | struct attr_abbrev * abbrev, | |
1180 | struct comp_unit * unit, | |
1181 | bfd_byte * info_ptr, | |
1182 | bfd_byte * info_ptr_end) | |
cf716c56 RH |
1183 | { |
1184 | attr->name = abbrev->name; | |
dbb3fbbb | 1185 | info_ptr = read_attribute_value (attr, abbrev->form, unit, info_ptr, info_ptr_end); |
cf716c56 RH |
1186 | return info_ptr; |
1187 | } | |
1188 | ||
e00e8198 AM |
1189 | /* Return whether DW_AT_name will return the same as DW_AT_linkage_name |
1190 | for a function. */ | |
1191 | ||
1192 | static bfd_boolean | |
1193 | non_mangled (int lang) | |
1194 | { | |
1195 | switch (lang) | |
1196 | { | |
1197 | default: | |
1198 | return FALSE; | |
1199 | ||
1200 | case DW_LANG_C89: | |
1201 | case DW_LANG_C: | |
1202 | case DW_LANG_Ada83: | |
1203 | case DW_LANG_Cobol74: | |
1204 | case DW_LANG_Cobol85: | |
1205 | case DW_LANG_Fortran77: | |
1206 | case DW_LANG_Pascal83: | |
1207 | case DW_LANG_C99: | |
1208 | case DW_LANG_Ada95: | |
1209 | case DW_LANG_PLI: | |
1210 | case DW_LANG_UPC: | |
1211 | case DW_LANG_C11: | |
1212 | return TRUE; | |
1213 | } | |
1214 | } | |
1215 | ||
a092b084 | 1216 | /* Source line information table routines. */ |
252b5132 RH |
1217 | |
1218 | #define FILE_ALLOC_CHUNK 5 | |
1219 | #define DIR_ALLOC_CHUNK 5 | |
1220 | ||
a092b084 NC |
1221 | struct line_info |
1222 | { | |
089e3718 IT |
1223 | struct line_info * prev_line; |
1224 | bfd_vma address; | |
1225 | char * filename; | |
1226 | unsigned int line; | |
1227 | unsigned int column; | |
1228 | unsigned int discriminator; | |
1229 | unsigned char op_index; | |
1230 | unsigned char end_sequence; /* End of (sequential) code sequence. */ | |
252b5132 RH |
1231 | }; |
1232 | ||
a092b084 NC |
1233 | struct fileinfo |
1234 | { | |
089e3718 IT |
1235 | char * name; |
1236 | unsigned int dir; | |
1237 | unsigned int time; | |
1238 | unsigned int size; | |
252b5132 RH |
1239 | }; |
1240 | ||
0ee19663 NC |
1241 | struct line_sequence |
1242 | { | |
1243 | bfd_vma low_pc; | |
1244 | struct line_sequence* prev_sequence; | |
1245 | struct line_info* last_line; /* Largest VMA. */ | |
089e3718 IT |
1246 | struct line_info** line_info_lookup; |
1247 | bfd_size_type num_lines; | |
0ee19663 NC |
1248 | }; |
1249 | ||
a092b084 NC |
1250 | struct line_info_table |
1251 | { | |
089e3718 | 1252 | bfd * abfd; |
0ee19663 NC |
1253 | unsigned int num_files; |
1254 | unsigned int num_dirs; | |
1255 | unsigned int num_sequences; | |
1256 | char * comp_dir; | |
1257 | char ** dirs; | |
1258 | struct fileinfo* files; | |
1259 | struct line_sequence* sequences; | |
1260 | struct line_info* lcl_head; /* Local head; used in 'add_line_info'. */ | |
252b5132 RH |
1261 | }; |
1262 | ||
4ab527b0 FF |
1263 | /* Remember some information about each function. If the function is |
1264 | inlined (DW_TAG_inlined_subroutine) it may have two additional | |
1265 | attributes, DW_AT_call_file and DW_AT_call_line, which specify the | |
a2a50954 | 1266 | source code location where this function was inlined. */ |
4ab527b0 | 1267 | |
1ee24f27 DJ |
1268 | struct funcinfo |
1269 | { | |
a2a50954 | 1270 | /* Pointer to previous function in list of all functions. */ |
089e3718 | 1271 | struct funcinfo * prev_func; |
a2a50954 | 1272 | /* Pointer to function one scope higher. */ |
089e3718 | 1273 | struct funcinfo * caller_func; |
a2a50954 | 1274 | /* Source location file name where caller_func inlines this func. */ |
089e3718 | 1275 | char * caller_file; |
a2a50954 | 1276 | /* Source location file name. */ |
089e3718 | 1277 | char * file; |
e00e8198 | 1278 | /* Source location line number where caller_func inlines this func. */ |
089e3718 | 1279 | int caller_line; |
a2a50954 | 1280 | /* Source location line number. */ |
089e3718 IT |
1281 | int line; |
1282 | int tag; | |
3b0d929d | 1283 | bfd_boolean is_linkage; |
089e3718 IT |
1284 | const char * name; |
1285 | struct arange arange; | |
a2a50954 | 1286 | /* Where the symbol is defined. */ |
089e3718 IT |
1287 | asection * sec; |
1288 | }; | |
1289 | ||
1290 | struct lookup_funcinfo | |
1291 | { | |
1292 | /* Function information corresponding to this lookup table entry. */ | |
1293 | struct funcinfo * funcinfo; | |
1294 | ||
1295 | /* The lowest address for this specific function. */ | |
1296 | bfd_vma low_addr; | |
1297 | ||
1298 | /* The highest address of this function before the lookup table is sorted. | |
1299 | The highest address of all prior functions after the lookup table is | |
1300 | sorted, which is used for binary search. */ | |
1301 | bfd_vma high_addr; | |
5420f73d L |
1302 | }; |
1303 | ||
1304 | struct varinfo | |
1305 | { | |
709d67f1 | 1306 | /* Pointer to previous variable in list of all variables */ |
5420f73d | 1307 | struct varinfo *prev_var; |
709d67f1 | 1308 | /* Source location file name */ |
5420f73d | 1309 | char *file; |
709d67f1 | 1310 | /* Source location line number */ |
5420f73d L |
1311 | int line; |
1312 | int tag; | |
1313 | char *name; | |
5cf2e3f0 | 1314 | bfd_vma addr; |
709d67f1 | 1315 | /* Where the symbol is defined */ |
5420f73d | 1316 | asection *sec; |
709d67f1 | 1317 | /* Is this a stack variable? */ |
5420f73d | 1318 | unsigned int stack: 1; |
1ee24f27 DJ |
1319 | }; |
1320 | ||
d4c32a81 L |
1321 | /* Return TRUE if NEW_LINE should sort after LINE. */ |
1322 | ||
1323 | static inline bfd_boolean | |
1324 | new_line_sorts_after (struct line_info *new_line, struct line_info *line) | |
1325 | { | |
1326 | return (new_line->address > line->address | |
1327 | || (new_line->address == line->address | |
a233b20c JJ |
1328 | && (new_line->op_index > line->op_index |
1329 | || (new_line->op_index == line->op_index | |
1330 | && new_line->end_sequence < line->end_sequence)))); | |
d4c32a81 L |
1331 | } |
1332 | ||
1333 | ||
af3ef9fe NC |
1334 | /* Adds a new entry to the line_info list in the line_info_table, ensuring |
1335 | that the list is sorted. Note that the line_info list is sorted from | |
1336 | highest to lowest VMA (with possible duplicates); that is, | |
1337 | line_info->prev_line always accesses an equal or smaller VMA. */ | |
1338 | ||
8af6b354 | 1339 | static bfd_boolean |
818a27ac AM |
1340 | add_line_info (struct line_info_table *table, |
1341 | bfd_vma address, | |
a233b20c | 1342 | unsigned char op_index, |
818a27ac AM |
1343 | char *filename, |
1344 | unsigned int line, | |
1345 | unsigned int column, | |
9b8d1a36 | 1346 | unsigned int discriminator, |
818a27ac | 1347 | int end_sequence) |
252b5132 | 1348 | { |
dc810e39 | 1349 | bfd_size_type amt = sizeof (struct line_info); |
0ee19663 | 1350 | struct line_sequence* seq = table->sequences; |
a50b1753 | 1351 | struct line_info* info = (struct line_info *) bfd_alloc (table->abfd, amt); |
252b5132 | 1352 | |
8af6b354 AM |
1353 | if (info == NULL) |
1354 | return FALSE; | |
1355 | ||
d4c32a81 | 1356 | /* Set member data of 'info'. */ |
f5296ddc | 1357 | info->prev_line = NULL; |
d4c32a81 | 1358 | info->address = address; |
a233b20c | 1359 | info->op_index = op_index; |
d4c32a81 L |
1360 | info->line = line; |
1361 | info->column = column; | |
9b8d1a36 | 1362 | info->discriminator = discriminator; |
d4c32a81 L |
1363 | info->end_sequence = end_sequence; |
1364 | ||
1365 | if (filename && filename[0]) | |
1366 | { | |
a50b1753 | 1367 | info->filename = (char *) bfd_alloc (table->abfd, strlen (filename) + 1); |
8af6b354 AM |
1368 | if (info->filename == NULL) |
1369 | return FALSE; | |
1370 | strcpy (info->filename, filename); | |
d4c32a81 L |
1371 | } |
1372 | else | |
1373 | info->filename = NULL; | |
1374 | ||
e82ce529 AM |
1375 | /* Find the correct location for 'info'. Normally we will receive |
1376 | new line_info data 1) in order and 2) with increasing VMAs. | |
1377 | However some compilers break the rules (cf. decode_line_info) and | |
1378 | so we include some heuristics for quickly finding the correct | |
1379 | location for 'info'. In particular, these heuristics optimize for | |
1380 | the common case in which the VMA sequence that we receive is a | |
1381 | list of locally sorted VMAs such as | |
1382 | p...z a...j (where a < j < p < z) | |
252b5132 | 1383 | |
e82ce529 | 1384 | Note: table->lcl_head is used to head an *actual* or *possible* |
0ee19663 | 1385 | sub-sequence within the list (such as a...j) that is not directly |
e82ce529 AM |
1386 | headed by table->last_line |
1387 | ||
1388 | Note: we may receive duplicate entries from 'decode_line_info'. */ | |
1389 | ||
0ee19663 NC |
1390 | if (seq |
1391 | && seq->last_line->address == address | |
a233b20c | 1392 | && seq->last_line->op_index == op_index |
0ee19663 | 1393 | && seq->last_line->end_sequence == end_sequence) |
aff90a5f L |
1394 | { |
1395 | /* We only keep the last entry with the same address and end | |
1396 | sequence. See PR ld/4986. */ | |
0ee19663 | 1397 | if (table->lcl_head == seq->last_line) |
aff90a5f | 1398 | table->lcl_head = info; |
0ee19663 NC |
1399 | info->prev_line = seq->last_line->prev_line; |
1400 | seq->last_line = info; | |
aff90a5f | 1401 | } |
0ee19663 | 1402 | else if (!seq || seq->last_line->end_sequence) |
d8d1c398 | 1403 | { |
0ee19663 NC |
1404 | /* Start a new line sequence. */ |
1405 | amt = sizeof (struct line_sequence); | |
1406 | seq = (struct line_sequence *) bfd_malloc (amt); | |
8af6b354 AM |
1407 | if (seq == NULL) |
1408 | return FALSE; | |
0ee19663 NC |
1409 | seq->low_pc = address; |
1410 | seq->prev_sequence = table->sequences; | |
1411 | seq->last_line = info; | |
1412 | table->lcl_head = info; | |
1413 | table->sequences = seq; | |
1414 | table->num_sequences++; | |
1415 | } | |
1416 | else if (new_line_sorts_after (info, seq->last_line)) | |
1417 | { | |
1418 | /* Normal case: add 'info' to the beginning of the current sequence. */ | |
1419 | info->prev_line = seq->last_line; | |
1420 | seq->last_line = info; | |
e82ce529 | 1421 | |
d8d1c398 AM |
1422 | /* lcl_head: initialize to head a *possible* sequence at the end. */ |
1423 | if (!table->lcl_head) | |
1424 | table->lcl_head = info; | |
1425 | } | |
1426 | else if (!new_line_sorts_after (info, table->lcl_head) | |
1427 | && (!table->lcl_head->prev_line | |
1428 | || new_line_sorts_after (info, table->lcl_head->prev_line))) | |
1429 | { | |
1430 | /* Abnormal but easy: lcl_head is the head of 'info'. */ | |
1431 | info->prev_line = table->lcl_head->prev_line; | |
1432 | table->lcl_head->prev_line = info; | |
1433 | } | |
1434 | else | |
1435 | { | |
0ee19663 NC |
1436 | /* Abnormal and hard: Neither 'last_line' nor 'lcl_head' |
1437 | are valid heads for 'info'. Reset 'lcl_head'. */ | |
1438 | struct line_info* li2 = seq->last_line; /* Always non-NULL. */ | |
d8d1c398 | 1439 | struct line_info* li1 = li2->prev_line; |
e82ce529 | 1440 | |
d8d1c398 AM |
1441 | while (li1) |
1442 | { | |
1443 | if (!new_line_sorts_after (info, li2) | |
1444 | && new_line_sorts_after (info, li1)) | |
1445 | break; | |
e82ce529 | 1446 | |
709d67f1 | 1447 | li2 = li1; /* always non-NULL */ |
d8d1c398 AM |
1448 | li1 = li1->prev_line; |
1449 | } | |
1450 | table->lcl_head = li2; | |
1451 | info->prev_line = table->lcl_head->prev_line; | |
1452 | table->lcl_head->prev_line = info; | |
0ee19663 | 1453 | if (address < seq->low_pc) |
93ee1e36 | 1454 | seq->low_pc = address; |
d8d1c398 | 1455 | } |
8af6b354 | 1456 | return TRUE; |
252b5132 RH |
1457 | } |
1458 | ||
5ed6aba4 | 1459 | /* Extract a fully qualified filename from a line info table. |
af3ef9fe NC |
1460 | The returned string has been malloc'ed and it is the caller's |
1461 | responsibility to free it. */ | |
5ed6aba4 | 1462 | |
a092b084 | 1463 | static char * |
818a27ac | 1464 | concat_filename (struct line_info_table *table, unsigned int file) |
252b5132 | 1465 | { |
f075ee0c | 1466 | char *filename; |
159002ff RH |
1467 | |
1468 | if (file - 1 >= table->num_files) | |
1469 | { | |
75a657ba L |
1470 | /* FILE == 0 means unknown. */ |
1471 | if (file) | |
4eca0228 | 1472 | _bfd_error_handler |
75a657ba | 1473 | (_("Dwarf Error: mangled line number section (bad file number).")); |
af3ef9fe | 1474 | return strdup ("<unknown>"); |
159002ff RH |
1475 | } |
1476 | ||
1477 | filename = table->files[file - 1].name; | |
5ed6aba4 | 1478 | |
7421a730 | 1479 | if (!IS_ABSOLUTE_PATH (filename)) |
252b5132 | 1480 | { |
608fa8d3 JB |
1481 | char *dir_name = NULL; |
1482 | char *subdir_name = NULL; | |
7421a730 AM |
1483 | char *name; |
1484 | size_t len; | |
0dafd5f6 | 1485 | |
877a8638 | 1486 | if (table->files[file - 1].dir |
dbb3fbbb NC |
1487 | /* PR 17512: file: 0317e960. */ |
1488 | && table->files[file - 1].dir <= table->num_dirs | |
877a8638 NC |
1489 | /* PR 17512: file: 7f3d2e4b. */ |
1490 | && table->dirs != NULL) | |
608fa8d3 | 1491 | subdir_name = table->dirs[table->files[file - 1].dir - 1]; |
7421a730 | 1492 | |
608fa8d3 JB |
1493 | if (!subdir_name || !IS_ABSOLUTE_PATH (subdir_name)) |
1494 | dir_name = table->comp_dir; | |
7421a730 | 1495 | |
608fa8d3 | 1496 | if (!dir_name) |
af3ef9fe | 1497 | { |
608fa8d3 JB |
1498 | dir_name = subdir_name; |
1499 | subdir_name = NULL; | |
7421a730 | 1500 | } |
af3ef9fe | 1501 | |
608fa8d3 | 1502 | if (!dir_name) |
7421a730 AM |
1503 | return strdup (filename); |
1504 | ||
608fa8d3 | 1505 | len = strlen (dir_name) + strlen (filename) + 2; |
7421a730 | 1506 | |
608fa8d3 | 1507 | if (subdir_name) |
7421a730 | 1508 | { |
608fa8d3 | 1509 | len += strlen (subdir_name) + 1; |
a50b1753 | 1510 | name = (char *) bfd_malloc (len); |
7421a730 | 1511 | if (name) |
608fa8d3 | 1512 | sprintf (name, "%s/%s/%s", dir_name, subdir_name, filename); |
7421a730 AM |
1513 | } |
1514 | else | |
1515 | { | |
a50b1753 | 1516 | name = (char *) bfd_malloc (len); |
af3ef9fe | 1517 | if (name) |
608fa8d3 | 1518 | sprintf (name, "%s/%s", dir_name, filename); |
af3ef9fe | 1519 | } |
7421a730 AM |
1520 | |
1521 | return name; | |
252b5132 | 1522 | } |
af3ef9fe NC |
1523 | |
1524 | return strdup (filename); | |
252b5132 RH |
1525 | } |
1526 | ||
8af6b354 | 1527 | static bfd_boolean |
a2a50954 | 1528 | arange_add (const struct comp_unit *unit, struct arange *first_arange, |
8af6b354 | 1529 | bfd_vma low_pc, bfd_vma high_pc) |
f623be2b RH |
1530 | { |
1531 | struct arange *arange; | |
1532 | ||
a2a50954 AM |
1533 | /* Ignore empty ranges. */ |
1534 | if (low_pc == high_pc) | |
1535 | return TRUE; | |
1536 | ||
1537 | /* If the first arange is empty, use it. */ | |
a13afe8e FF |
1538 | if (first_arange->high == 0) |
1539 | { | |
1540 | first_arange->low = low_pc; | |
1541 | first_arange->high = high_pc; | |
8af6b354 | 1542 | return TRUE; |
a13afe8e | 1543 | } |
98591c73 | 1544 | |
a13afe8e FF |
1545 | /* Next see if we can cheaply extend an existing range. */ |
1546 | arange = first_arange; | |
f623be2b RH |
1547 | do |
1548 | { | |
1549 | if (low_pc == arange->high) | |
1550 | { | |
1551 | arange->high = high_pc; | |
8af6b354 | 1552 | return TRUE; |
f623be2b RH |
1553 | } |
1554 | if (high_pc == arange->low) | |
1555 | { | |
1556 | arange->low = low_pc; | |
8af6b354 | 1557 | return TRUE; |
f623be2b RH |
1558 | } |
1559 | arange = arange->next; | |
1560 | } | |
1561 | while (arange); | |
1562 | ||
a13afe8e | 1563 | /* Need to allocate a new arange and insert it into the arange list. |
089e3718 | 1564 | Order isn't significant, so just insert after the first arange. */ |
a2a50954 | 1565 | arange = (struct arange *) bfd_alloc (unit->abfd, sizeof (*arange)); |
8af6b354 AM |
1566 | if (arange == NULL) |
1567 | return FALSE; | |
f623be2b RH |
1568 | arange->low = low_pc; |
1569 | arange->high = high_pc; | |
a13afe8e FF |
1570 | arange->next = first_arange->next; |
1571 | first_arange->next = arange; | |
8af6b354 | 1572 | return TRUE; |
f623be2b RH |
1573 | } |
1574 | ||
0ee19663 NC |
1575 | /* Compare function for line sequences. */ |
1576 | ||
1577 | static int | |
1578 | compare_sequences (const void* a, const void* b) | |
1579 | { | |
1580 | const struct line_sequence* seq1 = a; | |
1581 | const struct line_sequence* seq2 = b; | |
1582 | ||
1583 | /* Sort by low_pc as the primary key. */ | |
1584 | if (seq1->low_pc < seq2->low_pc) | |
1585 | return -1; | |
1586 | if (seq1->low_pc > seq2->low_pc) | |
1587 | return 1; | |
1588 | ||
1589 | /* If low_pc values are equal, sort in reverse order of | |
1590 | high_pc, so that the largest region comes first. */ | |
1591 | if (seq1->last_line->address < seq2->last_line->address) | |
1592 | return 1; | |
1593 | if (seq1->last_line->address > seq2->last_line->address) | |
1594 | return -1; | |
1595 | ||
a233b20c JJ |
1596 | if (seq1->last_line->op_index < seq2->last_line->op_index) |
1597 | return 1; | |
1598 | if (seq1->last_line->op_index > seq2->last_line->op_index) | |
1599 | return -1; | |
1600 | ||
0ee19663 NC |
1601 | return 0; |
1602 | } | |
1603 | ||
089e3718 IT |
1604 | /* Construct the line information table for quick lookup. */ |
1605 | ||
1606 | static bfd_boolean | |
1607 | build_line_info_table (struct line_info_table * table, | |
1608 | struct line_sequence * seq) | |
1609 | { | |
1610 | bfd_size_type amt; | |
1611 | struct line_info** line_info_lookup; | |
1612 | struct line_info* each_line; | |
1613 | unsigned int num_lines; | |
b6ddcd85 | 1614 | unsigned int line_index; |
089e3718 IT |
1615 | |
1616 | if (seq->line_info_lookup != NULL) | |
1617 | return TRUE; | |
1618 | ||
1619 | /* Count the number of line information entries. We could do this while | |
1620 | scanning the debug information, but some entries may be added via | |
1621 | lcl_head without having a sequence handy to increment the number of | |
1622 | lines. */ | |
1623 | num_lines = 0; | |
1624 | for (each_line = seq->last_line; each_line; each_line = each_line->prev_line) | |
1625 | num_lines++; | |
1626 | ||
1627 | if (num_lines == 0) | |
1628 | return TRUE; | |
1629 | ||
1630 | /* Allocate space for the line information lookup table. */ | |
1631 | amt = sizeof (struct line_info*) * num_lines; | |
1632 | line_info_lookup = (struct line_info**) bfd_alloc (table->abfd, amt); | |
1633 | if (line_info_lookup == NULL) | |
1634 | return FALSE; | |
1635 | ||
1636 | /* Create the line information lookup table. */ | |
b6ddcd85 | 1637 | line_index = num_lines; |
089e3718 | 1638 | for (each_line = seq->last_line; each_line; each_line = each_line->prev_line) |
b6ddcd85 | 1639 | line_info_lookup[--line_index] = each_line; |
089e3718 | 1640 | |
b6ddcd85 | 1641 | BFD_ASSERT (line_index == 0); |
089e3718 IT |
1642 | |
1643 | seq->num_lines = num_lines; | |
1644 | seq->line_info_lookup = line_info_lookup; | |
1645 | ||
1646 | return TRUE; | |
1647 | } | |
1648 | ||
0ee19663 NC |
1649 | /* Sort the line sequences for quick lookup. */ |
1650 | ||
8af6b354 | 1651 | static bfd_boolean |
0ee19663 NC |
1652 | sort_line_sequences (struct line_info_table* table) |
1653 | { | |
089e3718 IT |
1654 | bfd_size_type amt; |
1655 | struct line_sequence* sequences; | |
1656 | struct line_sequence* seq; | |
1657 | unsigned int n = 0; | |
1658 | unsigned int num_sequences = table->num_sequences; | |
1659 | bfd_vma last_high_pc; | |
0ee19663 NC |
1660 | |
1661 | if (num_sequences == 0) | |
8af6b354 | 1662 | return TRUE; |
0ee19663 NC |
1663 | |
1664 | /* Allocate space for an array of sequences. */ | |
1665 | amt = sizeof (struct line_sequence) * num_sequences; | |
1666 | sequences = (struct line_sequence *) bfd_alloc (table->abfd, amt); | |
8af6b354 AM |
1667 | if (sequences == NULL) |
1668 | return FALSE; | |
0ee19663 NC |
1669 | |
1670 | /* Copy the linked list into the array, freeing the original nodes. */ | |
1671 | seq = table->sequences; | |
1672 | for (n = 0; n < num_sequences; n++) | |
1673 | { | |
1674 | struct line_sequence* last_seq = seq; | |
1675 | ||
1676 | BFD_ASSERT (seq); | |
1677 | sequences[n].low_pc = seq->low_pc; | |
1678 | sequences[n].prev_sequence = NULL; | |
1679 | sequences[n].last_line = seq->last_line; | |
089e3718 IT |
1680 | sequences[n].line_info_lookup = NULL; |
1681 | sequences[n].num_lines = 0; | |
0ee19663 NC |
1682 | seq = seq->prev_sequence; |
1683 | free (last_seq); | |
1684 | } | |
1685 | BFD_ASSERT (seq == NULL); | |
1686 | ||
1687 | qsort (sequences, n, sizeof (struct line_sequence), compare_sequences); | |
1688 | ||
1689 | /* Make the list binary-searchable by trimming overlapping entries | |
1690 | and removing nested entries. */ | |
1691 | num_sequences = 1; | |
1692 | last_high_pc = sequences[0].last_line->address; | |
1693 | for (n = 1; n < table->num_sequences; n++) | |
1694 | { | |
1695 | if (sequences[n].low_pc < last_high_pc) | |
93ee1e36 | 1696 | { |
0ee19663 NC |
1697 | if (sequences[n].last_line->address <= last_high_pc) |
1698 | /* Skip nested entries. */ | |
1699 | continue; | |
1700 | ||
1701 | /* Trim overlapping entries. */ | |
1702 | sequences[n].low_pc = last_high_pc; | |
93ee1e36 | 1703 | } |
0ee19663 NC |
1704 | last_high_pc = sequences[n].last_line->address; |
1705 | if (n > num_sequences) | |
93ee1e36 AM |
1706 | { |
1707 | /* Close up the gap. */ | |
1708 | sequences[num_sequences].low_pc = sequences[n].low_pc; | |
1709 | sequences[num_sequences].last_line = sequences[n].last_line; | |
1710 | } | |
0ee19663 NC |
1711 | num_sequences++; |
1712 | } | |
1713 | ||
1714 | table->sequences = sequences; | |
1715 | table->num_sequences = num_sequences; | |
8af6b354 | 1716 | return TRUE; |
0ee19663 NC |
1717 | } |
1718 | ||
34b5e0b2 | 1719 | /* Decode the line number information for UNIT. */ |
252b5132 | 1720 | |
34b5e0b2 | 1721 | static struct line_info_table* |
818a27ac | 1722 | decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) |
252b5132 RH |
1723 | { |
1724 | bfd *abfd = unit->abfd; | |
252b5132 | 1725 | struct line_info_table* table; |
f075ee0c AM |
1726 | bfd_byte *line_ptr; |
1727 | bfd_byte *line_end; | |
252b5132 | 1728 | struct line_head lh; |
d03ba2a1 | 1729 | unsigned int i, bytes_read, offset_size; |
252b5132 RH |
1730 | char *cur_file, *cur_dir; |
1731 | unsigned char op_code, extended_op, adj_opcode; | |
fec16237 | 1732 | unsigned int exop_len; |
dc810e39 | 1733 | bfd_size_type amt; |
252b5132 | 1734 | |
fc28f9aa | 1735 | if (! read_section (abfd, &stash->debug_sections[debug_line], |
93ee1e36 | 1736 | stash->syms, unit->line_offset, |
9e32b19f | 1737 | &stash->dwarf_line_buffer, &stash->dwarf_line_size)) |
8af6b354 | 1738 | return NULL; |
ccdb16fc | 1739 | |
dc810e39 | 1740 | amt = sizeof (struct line_info_table); |
a50b1753 | 1741 | table = (struct line_info_table *) bfd_alloc (abfd, amt); |
8af6b354 AM |
1742 | if (table == NULL) |
1743 | return NULL; | |
252b5132 RH |
1744 | table->abfd = abfd; |
1745 | table->comp_dir = unit->comp_dir; | |
1746 | ||
1747 | table->num_files = 0; | |
1748 | table->files = NULL; | |
1749 | ||
1750 | table->num_dirs = 0; | |
1751 | table->dirs = NULL; | |
1752 | ||
0ee19663 NC |
1753 | table->num_sequences = 0; |
1754 | table->sequences = NULL; | |
1755 | ||
e82ce529 | 1756 | table->lcl_head = NULL; |
159002ff | 1757 | |
dbb3fbbb NC |
1758 | if (stash->dwarf_line_size < 16) |
1759 | { | |
4eca0228 | 1760 | _bfd_error_handler |
dbb3fbbb NC |
1761 | (_("Dwarf Error: Line info section is too small (%ld)"), |
1762 | (long) stash->dwarf_line_size); | |
1763 | bfd_set_error (bfd_error_bad_value); | |
1764 | return NULL; | |
1765 | } | |
69dd2e2d | 1766 | line_ptr = stash->dwarf_line_buffer + unit->line_offset; |
dbb3fbbb | 1767 | line_end = stash->dwarf_line_buffer + stash->dwarf_line_size; |
252b5132 | 1768 | |
a092b084 | 1769 | /* Read in the prologue. */ |
dbb3fbbb | 1770 | lh.total_length = read_4_bytes (abfd, line_ptr, line_end); |
91a4d569 AM |
1771 | line_ptr += 4; |
1772 | offset_size = 4; | |
1773 | if (lh.total_length == 0xffffffff) | |
dae2dd0d | 1774 | { |
dbb3fbbb | 1775 | lh.total_length = read_8_bytes (abfd, line_ptr, line_end); |
dae2dd0d NC |
1776 | line_ptr += 8; |
1777 | offset_size = 8; | |
1778 | } | |
91a4d569 | 1779 | else if (lh.total_length == 0 && unit->addr_size == 8) |
d03ba2a1 | 1780 | { |
91a4d569 | 1781 | /* Handle (non-standard) 64-bit DWARF2 formats. */ |
dbb3fbbb | 1782 | lh.total_length = read_4_bytes (abfd, line_ptr, line_end); |
91a4d569 | 1783 | line_ptr += 4; |
d03ba2a1 JJ |
1784 | offset_size = 8; |
1785 | } | |
dbb3fbbb NC |
1786 | |
1787 | if (lh.total_length > stash->dwarf_line_size) | |
1788 | { | |
4eca0228 | 1789 | _bfd_error_handler |
695344c0 | 1790 | /* xgettext: c-format */ |
dbb3fbbb NC |
1791 | (_("Dwarf Error: Line info data is bigger (0x%lx) than the section (0x%lx)"), |
1792 | (long) lh.total_length, (long) stash->dwarf_line_size); | |
1793 | bfd_set_error (bfd_error_bad_value); | |
1794 | return NULL; | |
1795 | } | |
62f8d217 | 1796 | |
252b5132 | 1797 | line_end = line_ptr + lh.total_length; |
62f8d217 | 1798 | |
dbb3fbbb | 1799 | lh.version = read_2_bytes (abfd, line_ptr, line_end); |
a233b20c JJ |
1800 | if (lh.version < 2 || lh.version > 4) |
1801 | { | |
4eca0228 | 1802 | _bfd_error_handler |
a233b20c JJ |
1803 | (_("Dwarf Error: Unhandled .debug_line version %d."), lh.version); |
1804 | bfd_set_error (bfd_error_bad_value); | |
1805 | return NULL; | |
1806 | } | |
252b5132 | 1807 | line_ptr += 2; |
dbb3fbbb NC |
1808 | |
1809 | if (line_ptr + offset_size + (lh.version >=4 ? 6 : 5) >= line_end) | |
1810 | { | |
4eca0228 | 1811 | _bfd_error_handler |
dbb3fbbb NC |
1812 | (_("Dwarf Error: Ran out of room reading prologue")); |
1813 | bfd_set_error (bfd_error_bad_value); | |
1814 | return NULL; | |
1815 | } | |
1816 | ||
d03ba2a1 | 1817 | if (offset_size == 4) |
dbb3fbbb | 1818 | lh.prologue_length = read_4_bytes (abfd, line_ptr, line_end); |
d03ba2a1 | 1819 | else |
dbb3fbbb | 1820 | lh.prologue_length = read_8_bytes (abfd, line_ptr, line_end); |
d03ba2a1 | 1821 | line_ptr += offset_size; |
dbb3fbbb NC |
1822 | |
1823 | lh.minimum_instruction_length = read_1_byte (abfd, line_ptr, line_end); | |
252b5132 | 1824 | line_ptr += 1; |
dbb3fbbb | 1825 | |
a233b20c JJ |
1826 | if (lh.version >= 4) |
1827 | { | |
dbb3fbbb | 1828 | lh.maximum_ops_per_insn = read_1_byte (abfd, line_ptr, line_end); |
a233b20c JJ |
1829 | line_ptr += 1; |
1830 | } | |
1831 | else | |
1832 | lh.maximum_ops_per_insn = 1; | |
dbb3fbbb | 1833 | |
a233b20c JJ |
1834 | if (lh.maximum_ops_per_insn == 0) |
1835 | { | |
4eca0228 | 1836 | _bfd_error_handler |
a233b20c JJ |
1837 | (_("Dwarf Error: Invalid maximum operations per instruction.")); |
1838 | bfd_set_error (bfd_error_bad_value); | |
1839 | return NULL; | |
1840 | } | |
dbb3fbbb NC |
1841 | |
1842 | lh.default_is_stmt = read_1_byte (abfd, line_ptr, line_end); | |
252b5132 | 1843 | line_ptr += 1; |
dbb3fbbb NC |
1844 | |
1845 | lh.line_base = read_1_signed_byte (abfd, line_ptr, line_end); | |
252b5132 | 1846 | line_ptr += 1; |
dbb3fbbb NC |
1847 | |
1848 | lh.line_range = read_1_byte (abfd, line_ptr, line_end); | |
252b5132 | 1849 | line_ptr += 1; |
dbb3fbbb NC |
1850 | |
1851 | lh.opcode_base = read_1_byte (abfd, line_ptr, line_end); | |
252b5132 | 1852 | line_ptr += 1; |
dbb3fbbb NC |
1853 | |
1854 | if (line_ptr + (lh.opcode_base - 1) >= line_end) | |
1855 | { | |
4eca0228 | 1856 | _bfd_error_handler (_("Dwarf Error: Ran out of room reading opcodes")); |
dbb3fbbb NC |
1857 | bfd_set_error (bfd_error_bad_value); |
1858 | return NULL; | |
1859 | } | |
62f8d217 | 1860 | |
dc810e39 | 1861 | amt = lh.opcode_base * sizeof (unsigned char); |
a50b1753 | 1862 | lh.standard_opcode_lengths = (unsigned char *) bfd_alloc (abfd, amt); |
252b5132 RH |
1863 | |
1864 | lh.standard_opcode_lengths[0] = 1; | |
98591c73 | 1865 | |
252b5132 RH |
1866 | for (i = 1; i < lh.opcode_base; ++i) |
1867 | { | |
dbb3fbbb | 1868 | lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr, line_end); |
252b5132 RH |
1869 | line_ptr += 1; |
1870 | } | |
1871 | ||
a092b084 | 1872 | /* Read directory table. */ |
dbb3fbbb | 1873 | while ((cur_dir = read_string (abfd, line_ptr, line_end, &bytes_read)) != NULL) |
252b5132 RH |
1874 | { |
1875 | line_ptr += bytes_read; | |
98591c73 | 1876 | |
252b5132 RH |
1877 | if ((table->num_dirs % DIR_ALLOC_CHUNK) == 0) |
1878 | { | |
35330cce NC |
1879 | char **tmp; |
1880 | ||
dc810e39 AM |
1881 | amt = table->num_dirs + DIR_ALLOC_CHUNK; |
1882 | amt *= sizeof (char *); | |
35330cce | 1883 | |
a50b1753 | 1884 | tmp = (char **) bfd_realloc (table->dirs, amt); |
35330cce | 1885 | if (tmp == NULL) |
8af6b354 | 1886 | goto fail; |
35330cce | 1887 | table->dirs = tmp; |
252b5132 | 1888 | } |
98591c73 | 1889 | |
252b5132 RH |
1890 | table->dirs[table->num_dirs++] = cur_dir; |
1891 | } | |
98591c73 | 1892 | |
252b5132 RH |
1893 | line_ptr += bytes_read; |
1894 | ||
a092b084 | 1895 | /* Read file name table. */ |
dbb3fbbb | 1896 | while ((cur_file = read_string (abfd, line_ptr, line_end, &bytes_read)) != NULL) |
252b5132 RH |
1897 | { |
1898 | line_ptr += bytes_read; | |
98591c73 | 1899 | |
252b5132 RH |
1900 | if ((table->num_files % FILE_ALLOC_CHUNK) == 0) |
1901 | { | |
35330cce NC |
1902 | struct fileinfo *tmp; |
1903 | ||
dc810e39 AM |
1904 | amt = table->num_files + FILE_ALLOC_CHUNK; |
1905 | amt *= sizeof (struct fileinfo); | |
35330cce | 1906 | |
a50b1753 | 1907 | tmp = (struct fileinfo *) bfd_realloc (table->files, amt); |
35330cce | 1908 | if (tmp == NULL) |
8af6b354 | 1909 | goto fail; |
35330cce | 1910 | table->files = tmp; |
252b5132 | 1911 | } |
98591c73 | 1912 | |
252b5132 RH |
1913 | table->files[table->num_files].name = cur_file; |
1914 | table->files[table->num_files].dir = | |
dbb3fbbb | 1915 | safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); |
252b5132 | 1916 | line_ptr += bytes_read; |
dbb3fbbb | 1917 | table->files[table->num_files].time = safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); |
252b5132 | 1918 | line_ptr += bytes_read; |
dbb3fbbb | 1919 | table->files[table->num_files].size = safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); |
252b5132 RH |
1920 | line_ptr += bytes_read; |
1921 | table->num_files++; | |
1922 | } | |
98591c73 | 1923 | |
252b5132 RH |
1924 | line_ptr += bytes_read; |
1925 | ||
1926 | /* Read the statement sequences until there's nothing left. */ | |
1927 | while (line_ptr < line_end) | |
1928 | { | |
a092b084 | 1929 | /* State machine registers. */ |
252b5132 | 1930 | bfd_vma address = 0; |
a233b20c | 1931 | unsigned char op_index = 0; |
8bfd78b3 | 1932 | char * filename = table->num_files ? concat_filename (table, 1) : NULL; |
252b5132 RH |
1933 | unsigned int line = 1; |
1934 | unsigned int column = 0; | |
9b8d1a36 | 1935 | unsigned int discriminator = 0; |
252b5132 | 1936 | int is_stmt = lh.default_is_stmt; |
e2f6d277 NC |
1937 | int end_sequence = 0; |
1938 | /* eraxxon@alumni.rice.edu: Against the DWARF2 specs, some | |
e82ce529 AM |
1939 | compilers generate address sequences that are wildly out of |
1940 | order using DW_LNE_set_address (e.g. Intel C++ 6.0 compiler | |
1941 | for ia64-Linux). Thus, to determine the low and high | |
1942 | address, we must compare on every DW_LNS_copy, etc. */ | |
75758e9d | 1943 | bfd_vma low_pc = (bfd_vma) -1; |
e2f6d277 | 1944 | bfd_vma high_pc = 0; |
252b5132 | 1945 | |
a092b084 | 1946 | /* Decode the table. */ |
252b5132 RH |
1947 | while (! end_sequence) |
1948 | { | |
dbb3fbbb | 1949 | op_code = read_1_byte (abfd, line_ptr, line_end); |
252b5132 | 1950 | line_ptr += 1; |
98591c73 | 1951 | |
1a509dcc | 1952 | if (op_code >= lh.opcode_base) |
e2f6d277 NC |
1953 | { |
1954 | /* Special operand. */ | |
1a509dcc | 1955 | adj_opcode = op_code - lh.opcode_base; |
dbb3fbbb NC |
1956 | if (lh.line_range == 0) |
1957 | goto line_fail; | |
a233b20c | 1958 | if (lh.maximum_ops_per_insn == 1) |
a2a50954 AM |
1959 | address += (adj_opcode / lh.line_range |
1960 | * lh.minimum_instruction_length); | |
a233b20c JJ |
1961 | else |
1962 | { | |
a2a50954 AM |
1963 | address += ((op_index + adj_opcode / lh.line_range) |
1964 | / lh.maximum_ops_per_insn | |
1965 | * lh.minimum_instruction_length); | |
1966 | op_index = ((op_index + adj_opcode / lh.line_range) | |
1967 | % lh.maximum_ops_per_insn); | |
a233b20c | 1968 | } |
1a509dcc GK |
1969 | line += lh.line_base + (adj_opcode % lh.line_range); |
1970 | /* Append row to matrix using current values. */ | |
a233b20c | 1971 | if (!add_line_info (table, address, op_index, filename, |
9b8d1a36 | 1972 | line, column, discriminator, 0)) |
8af6b354 | 1973 | goto line_fail; |
93ee1e36 | 1974 | discriminator = 0; |
75758e9d AM |
1975 | if (address < low_pc) |
1976 | low_pc = address; | |
e2f6d277 NC |
1977 | if (address > high_pc) |
1978 | high_pc = address; | |
1a509dcc GK |
1979 | } |
1980 | else switch (op_code) | |
252b5132 RH |
1981 | { |
1982 | case DW_LNS_extended_op: | |
dbb3fbbb | 1983 | exop_len = safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); |
fec16237 | 1984 | line_ptr += bytes_read; |
dbb3fbbb | 1985 | extended_op = read_1_byte (abfd, line_ptr, line_end); |
252b5132 | 1986 | line_ptr += 1; |
e2f6d277 | 1987 | |
252b5132 RH |
1988 | switch (extended_op) |
1989 | { | |
1990 | case DW_LNE_end_sequence: | |
1991 | end_sequence = 1; | |
9b8d1a36 CC |
1992 | if (!add_line_info (table, address, op_index, filename, line, |
1993 | column, discriminator, end_sequence)) | |
8af6b354 | 1994 | goto line_fail; |
93ee1e36 | 1995 | discriminator = 0; |
75758e9d AM |
1996 | if (address < low_pc) |
1997 | low_pc = address; | |
e2f6d277 NC |
1998 | if (address > high_pc) |
1999 | high_pc = address; | |
a2a50954 | 2000 | if (!arange_add (unit, &unit->arange, low_pc, high_pc)) |
8af6b354 | 2001 | goto line_fail; |
252b5132 RH |
2002 | break; |
2003 | case DW_LNE_set_address: | |
dbb3fbbb | 2004 | address = read_address (unit, line_ptr, line_end); |
a233b20c | 2005 | op_index = 0; |
252b5132 RH |
2006 | line_ptr += unit->addr_size; |
2007 | break; | |
2008 | case DW_LNE_define_file: | |
dbb3fbbb | 2009 | cur_file = read_string (abfd, line_ptr, line_end, &bytes_read); |
252b5132 RH |
2010 | line_ptr += bytes_read; |
2011 | if ((table->num_files % FILE_ALLOC_CHUNK) == 0) | |
2012 | { | |
35330cce NC |
2013 | struct fileinfo *tmp; |
2014 | ||
dc810e39 AM |
2015 | amt = table->num_files + FILE_ALLOC_CHUNK; |
2016 | amt *= sizeof (struct fileinfo); | |
a50b1753 | 2017 | tmp = (struct fileinfo *) bfd_realloc (table->files, amt); |
35330cce | 2018 | if (tmp == NULL) |
8af6b354 | 2019 | goto line_fail; |
35330cce | 2020 | table->files = tmp; |
252b5132 RH |
2021 | } |
2022 | table->files[table->num_files].name = cur_file; | |
2023 | table->files[table->num_files].dir = | |
dbb3fbbb | 2024 | safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); |
252b5132 RH |
2025 | line_ptr += bytes_read; |
2026 | table->files[table->num_files].time = | |
dbb3fbbb | 2027 | safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); |
252b5132 RH |
2028 | line_ptr += bytes_read; |
2029 | table->files[table->num_files].size = | |
dbb3fbbb | 2030 | safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); |
252b5132 RH |
2031 | line_ptr += bytes_read; |
2032 | table->num_files++; | |
2033 | break; | |
9e1f7c0e | 2034 | case DW_LNE_set_discriminator: |
9b8d1a36 | 2035 | discriminator = |
dbb3fbbb | 2036 | safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); |
9e1f7c0e DK |
2037 | line_ptr += bytes_read; |
2038 | break; | |
a2a50954 AM |
2039 | case DW_LNE_HP_source_file_correlation: |
2040 | line_ptr += exop_len - 1; | |
2041 | break; | |
252b5132 | 2042 | default: |
4eca0228 | 2043 | _bfd_error_handler |
a2a50954 | 2044 | (_("Dwarf Error: mangled line number section.")); |
252b5132 | 2045 | bfd_set_error (bfd_error_bad_value); |
8af6b354 AM |
2046 | line_fail: |
2047 | if (filename != NULL) | |
2048 | free (filename); | |
2049 | goto fail; | |
252b5132 RH |
2050 | } |
2051 | break; | |
2052 | case DW_LNS_copy: | |
a233b20c | 2053 | if (!add_line_info (table, address, op_index, |
9b8d1a36 | 2054 | filename, line, column, discriminator, 0)) |
8af6b354 | 2055 | goto line_fail; |
93ee1e36 | 2056 | discriminator = 0; |
75758e9d AM |
2057 | if (address < low_pc) |
2058 | low_pc = address; | |
e2f6d277 NC |
2059 | if (address > high_pc) |
2060 | high_pc = address; | |
252b5132 RH |
2061 | break; |
2062 | case DW_LNS_advance_pc: | |
a233b20c | 2063 | if (lh.maximum_ops_per_insn == 1) |
a2a50954 | 2064 | address += (lh.minimum_instruction_length |
dbb3fbbb NC |
2065 | * safe_read_leb128 (abfd, line_ptr, &bytes_read, |
2066 | FALSE, line_end)); | |
a233b20c JJ |
2067 | else |
2068 | { | |
dbb3fbbb NC |
2069 | bfd_vma adjust = safe_read_leb128 (abfd, line_ptr, &bytes_read, |
2070 | FALSE, line_end); | |
a2a50954 AM |
2071 | address = ((op_index + adjust) / lh.maximum_ops_per_insn |
2072 | * lh.minimum_instruction_length); | |
a233b20c JJ |
2073 | op_index = (op_index + adjust) % lh.maximum_ops_per_insn; |
2074 | } | |
252b5132 RH |
2075 | line_ptr += bytes_read; |
2076 | break; | |
2077 | case DW_LNS_advance_line: | |
dbb3fbbb | 2078 | line += safe_read_leb128 (abfd, line_ptr, &bytes_read, TRUE, line_end); |
252b5132 RH |
2079 | line_ptr += bytes_read; |
2080 | break; | |
2081 | case DW_LNS_set_file: | |
2082 | { | |
2083 | unsigned int file; | |
2084 | ||
e2f6d277 NC |
2085 | /* The file and directory tables are 0 |
2086 | based, the references are 1 based. */ | |
dbb3fbbb | 2087 | file = safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); |
252b5132 | 2088 | line_ptr += bytes_read; |
af3ef9fe NC |
2089 | if (filename) |
2090 | free (filename); | |
252b5132 RH |
2091 | filename = concat_filename (table, file); |
2092 | break; | |
2093 | } | |
2094 | case DW_LNS_set_column: | |
dbb3fbbb | 2095 | column = safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); |
252b5132 RH |
2096 | line_ptr += bytes_read; |
2097 | break; | |
2098 | case DW_LNS_negate_stmt: | |
2099 | is_stmt = (!is_stmt); | |
2100 | break; | |
2101 | case DW_LNS_set_basic_block: | |
252b5132 RH |
2102 | break; |
2103 | case DW_LNS_const_add_pc: | |
a233b20c | 2104 | if (lh.maximum_ops_per_insn == 1) |
a2a50954 AM |
2105 | address += (lh.minimum_instruction_length |
2106 | * ((255 - lh.opcode_base) / lh.line_range)); | |
a233b20c JJ |
2107 | else |
2108 | { | |
2109 | bfd_vma adjust = ((255 - lh.opcode_base) / lh.line_range); | |
a2a50954 AM |
2110 | address += (lh.minimum_instruction_length |
2111 | * ((op_index + adjust) | |
2112 | / lh.maximum_ops_per_insn)); | |
a233b20c JJ |
2113 | op_index = (op_index + adjust) % lh.maximum_ops_per_insn; |
2114 | } | |
252b5132 RH |
2115 | break; |
2116 | case DW_LNS_fixed_advance_pc: | |
dbb3fbbb | 2117 | address += read_2_bytes (abfd, line_ptr, line_end); |
a233b20c | 2118 | op_index = 0; |
252b5132 RH |
2119 | line_ptr += 2; |
2120 | break; | |
1a509dcc | 2121 | default: |
91d6fa6a NC |
2122 | /* Unknown standard opcode, ignore it. */ |
2123 | for (i = 0; i < lh.standard_opcode_lengths[op_code]; i++) | |
2124 | { | |
dbb3fbbb | 2125 | (void) safe_read_leb128 (abfd, line_ptr, &bytes_read, FALSE, line_end); |
91d6fa6a NC |
2126 | line_ptr += bytes_read; |
2127 | } | |
2128 | break; | |
252b5132 RH |
2129 | } |
2130 | } | |
5ed6aba4 | 2131 | |
af3ef9fe NC |
2132 | if (filename) |
2133 | free (filename); | |
252b5132 RH |
2134 | } |
2135 | ||
8af6b354 AM |
2136 | if (sort_line_sequences (table)) |
2137 | return table; | |
0ee19663 | 2138 | |
8af6b354 AM |
2139 | fail: |
2140 | if (table->sequences != NULL) | |
2141 | free (table->sequences); | |
2142 | if (table->files != NULL) | |
2143 | free (table->files); | |
2144 | if (table->dirs != NULL) | |
2145 | free (table->dirs); | |
2146 | return NULL; | |
252b5132 RH |
2147 | } |
2148 | ||
240d6706 NC |
2149 | /* If ADDR is within TABLE set the output parameters and return the |
2150 | range of addresses covered by the entry used to fill them out. | |
2151 | Otherwise set * FILENAME_PTR to NULL and return 0. | |
2152 | The parameters FILENAME_PTR, LINENUMBER_PTR and DISCRIMINATOR_PTR | |
2153 | are pointers to the objects to be filled in. */ | |
252b5132 | 2154 | |
240d6706 | 2155 | static bfd_vma |
818a27ac AM |
2156 | lookup_address_in_line_info_table (struct line_info_table *table, |
2157 | bfd_vma addr, | |
818a27ac | 2158 | const char **filename_ptr, |
9b8d1a36 CC |
2159 | unsigned int *linenumber_ptr, |
2160 | unsigned int *discriminator_ptr) | |
252b5132 | 2161 | { |
0ee19663 | 2162 | struct line_sequence *seq = NULL; |
089e3718 | 2163 | struct line_info *info; |
0ee19663 | 2164 | int low, high, mid; |
e82ce529 | 2165 | |
0ee19663 NC |
2166 | /* Binary search the array of sequences. */ |
2167 | low = 0; | |
2168 | high = table->num_sequences; | |
2169 | while (low < high) | |
2170 | { | |
2171 | mid = (low + high) / 2; | |
2172 | seq = &table->sequences[mid]; | |
2173 | if (addr < seq->low_pc) | |
2174 | high = mid; | |
2175 | else if (addr >= seq->last_line->address) | |
2176 | low = mid + 1; | |
2177 | else | |
2178 | break; | |
2179 | } | |
98591c73 | 2180 | |
089e3718 IT |
2181 | /* Check for a valid sequence. */ |
2182 | if (!seq || addr < seq->low_pc || addr >= seq->last_line->address) | |
2183 | goto fail; | |
2184 | ||
2185 | if (!build_line_info_table (table, seq)) | |
2186 | goto fail; | |
2187 | ||
2188 | /* Binary search the array of line information. */ | |
2189 | low = 0; | |
2190 | high = seq->num_lines; | |
2191 | info = NULL; | |
2192 | while (low < high) | |
1ee24f27 | 2193 | { |
089e3718 IT |
2194 | mid = (low + high) / 2; |
2195 | info = seq->line_info_lookup[mid]; | |
2196 | if (addr < info->address) | |
2197 | high = mid; | |
2198 | else if (addr >= seq->line_info_lookup[mid + 1]->address) | |
2199 | low = mid + 1; | |
2200 | else | |
2201 | break; | |
2202 | } | |
0ee19663 | 2203 | |
089e3718 IT |
2204 | /* Check for a valid line information entry. */ |
2205 | if (info | |
2206 | && addr >= info->address | |
2207 | && addr < seq->line_info_lookup[mid + 1]->address | |
2208 | && !(info->end_sequence || info == seq->last_line)) | |
2209 | { | |
2210 | *filename_ptr = info->filename; | |
2211 | *linenumber_ptr = info->line; | |
2212 | if (discriminator_ptr) | |
2213 | *discriminator_ptr = info->discriminator; | |
2214 | return seq->last_line->address - seq->low_pc; | |
1ee24f27 DJ |
2215 | } |
2216 | ||
089e3718 | 2217 | fail: |
107601c8 | 2218 | *filename_ptr = NULL; |
240d6706 | 2219 | return 0; |
252b5132 | 2220 | } |
98591c73 | 2221 | |
0ee19663 | 2222 | /* Read in the .debug_ranges section for future reference. */ |
a13afe8e FF |
2223 | |
2224 | static bfd_boolean | |
089e3718 | 2225 | read_debug_ranges (struct comp_unit * unit) |
a13afe8e | 2226 | { |
089e3718 IT |
2227 | struct dwarf2_debug * stash = unit->stash; |
2228 | ||
fc28f9aa | 2229 | return read_section (unit->abfd, &stash->debug_sections[debug_ranges], |
93ee1e36 | 2230 | stash->syms, 0, |
089e3718 IT |
2231 | &stash->dwarf_ranges_buffer, |
2232 | &stash->dwarf_ranges_size); | |
a13afe8e FF |
2233 | } |
2234 | ||
a092b084 | 2235 | /* Function table functions. */ |
252b5132 | 2236 | |
089e3718 IT |
2237 | static int |
2238 | compare_lookup_funcinfos (const void * a, const void * b) | |
2239 | { | |
2240 | const struct lookup_funcinfo * lookup1 = a; | |
2241 | const struct lookup_funcinfo * lookup2 = b; | |
2242 | ||
2243 | if (lookup1->low_addr < lookup2->low_addr) | |
2244 | return -1; | |
2245 | if (lookup1->low_addr > lookup2->low_addr) | |
2246 | return 1; | |
2247 | if (lookup1->high_addr < lookup2->high_addr) | |
2248 | return -1; | |
2249 | if (lookup1->high_addr > lookup2->high_addr) | |
2250 | return 1; | |
2251 | ||
2252 | return 0; | |
2253 | } | |
2254 | ||
2255 | static bfd_boolean | |
2256 | build_lookup_funcinfo_table (struct comp_unit * unit) | |
2257 | { | |
2258 | struct lookup_funcinfo *lookup_funcinfo_table = unit->lookup_funcinfo_table; | |
2259 | unsigned int number_of_functions = unit->number_of_functions; | |
2260 | struct funcinfo *each; | |
2261 | struct lookup_funcinfo *entry; | |
b6ddcd85 | 2262 | size_t func_index; |
089e3718 IT |
2263 | struct arange *range; |
2264 | bfd_vma low_addr, high_addr; | |
2265 | ||
2266 | if (lookup_funcinfo_table || number_of_functions == 0) | |
2267 | return TRUE; | |
2268 | ||
2269 | /* Create the function info lookup table. */ | |
2270 | lookup_funcinfo_table = (struct lookup_funcinfo *) | |
2271 | bfd_malloc (number_of_functions * sizeof (struct lookup_funcinfo)); | |
2272 | if (lookup_funcinfo_table == NULL) | |
2273 | return FALSE; | |
2274 | ||
2275 | /* Populate the function info lookup table. */ | |
b6ddcd85 | 2276 | func_index = number_of_functions; |
089e3718 IT |
2277 | for (each = unit->function_table; each; each = each->prev_func) |
2278 | { | |
b6ddcd85 | 2279 | entry = &lookup_funcinfo_table[--func_index]; |
089e3718 IT |
2280 | entry->funcinfo = each; |
2281 | ||
2282 | /* Calculate the lowest and highest address for this function entry. */ | |
2283 | low_addr = entry->funcinfo->arange.low; | |
2284 | high_addr = entry->funcinfo->arange.high; | |
2285 | ||
2286 | for (range = entry->funcinfo->arange.next; range; range = range->next) | |
2287 | { | |
2288 | if (range->low < low_addr) | |
2289 | low_addr = range->low; | |
2290 | if (range->high > high_addr) | |
2291 | high_addr = range->high; | |
2292 | } | |
2293 | ||
2294 | entry->low_addr = low_addr; | |
2295 | entry->high_addr = high_addr; | |
2296 | } | |
2297 | ||
b6ddcd85 | 2298 | BFD_ASSERT (func_index == 0); |
089e3718 IT |
2299 | |
2300 | /* Sort the function by address. */ | |
2301 | qsort (lookup_funcinfo_table, | |
2302 | number_of_functions, | |
2303 | sizeof (struct lookup_funcinfo), | |
2304 | compare_lookup_funcinfos); | |
2305 | ||
2306 | /* Calculate the high watermark for each function in the lookup table. */ | |
2307 | high_addr = lookup_funcinfo_table[0].high_addr; | |
b6ddcd85 | 2308 | for (func_index = 1; func_index < number_of_functions; func_index++) |
089e3718 | 2309 | { |
b6ddcd85 | 2310 | entry = &lookup_funcinfo_table[func_index]; |
089e3718 IT |
2311 | if (entry->high_addr > high_addr) |
2312 | high_addr = entry->high_addr; | |
2313 | else | |
2314 | entry->high_addr = high_addr; | |
2315 | } | |
2316 | ||
2317 | unit->lookup_funcinfo_table = lookup_funcinfo_table; | |
2318 | return TRUE; | |
2319 | } | |
2320 | ||
e00e8198 | 2321 | /* If ADDR is within UNIT's function tables, set FUNCTION_PTR, and return |
240d6706 NC |
2322 | TRUE. Note that we need to find the function that has the smallest range |
2323 | that contains ADDR, to handle inlined functions without depending upon | |
2324 | them being ordered in TABLE by increasing range. */ | |
252b5132 | 2325 | |
b34976b6 | 2326 | static bfd_boolean |
4ab527b0 | 2327 | lookup_address_in_function_table (struct comp_unit *unit, |
818a27ac | 2328 | bfd_vma addr, |
e00e8198 | 2329 | struct funcinfo **function_ptr) |
252b5132 | 2330 | { |
089e3718 IT |
2331 | unsigned int number_of_functions = unit->number_of_functions; |
2332 | struct lookup_funcinfo* lookup_funcinfo = NULL; | |
2333 | struct funcinfo* funcinfo = NULL; | |
a13afe8e | 2334 | struct funcinfo* best_fit = NULL; |
4ba3b326 | 2335 | bfd_vma best_fit_len = 0; |
089e3718 | 2336 | bfd_size_type low, high, mid, first; |
a13afe8e | 2337 | struct arange *arange; |
252b5132 | 2338 | |
089e3718 IT |
2339 | if (!build_lookup_funcinfo_table (unit)) |
2340 | return FALSE; | |
2341 | ||
2342 | /* Find the first function in the lookup table which may contain the | |
2343 | specified address. */ | |
2344 | low = 0; | |
2345 | high = number_of_functions; | |
2346 | first = high; | |
2347 | while (low < high) | |
252b5132 | 2348 | { |
089e3718 IT |
2349 | mid = (low + high) / 2; |
2350 | lookup_funcinfo = &unit->lookup_funcinfo_table[mid]; | |
2351 | if (addr < lookup_funcinfo->low_addr) | |
2352 | high = mid; | |
2353 | else if (addr >= lookup_funcinfo->high_addr) | |
2354 | low = mid + 1; | |
2355 | else | |
2356 | high = first = mid; | |
2357 | } | |
2358 | ||
2359 | /* Find the 'best' match for the address. The prior algorithm defined the | |
2360 | best match as the function with the smallest address range containing | |
2361 | the specified address. This definition should probably be changed to the | |
2362 | innermost inline routine containing the address, but right now we want | |
2363 | to get the same results we did before. */ | |
2364 | while (first < number_of_functions) | |
2365 | { | |
2366 | if (addr < unit->lookup_funcinfo_table[first].low_addr) | |
2367 | break; | |
2368 | funcinfo = unit->lookup_funcinfo_table[first].funcinfo; | |
2369 | ||
2370 | for (arange = &funcinfo->arange; arange; arange = arange->next) | |
252b5132 | 2371 | { |
089e3718 IT |
2372 | if (addr < arange->low || addr >= arange->high) |
2373 | continue; | |
2374 | ||
2375 | if (!best_fit | |
2376 | || arange->high - arange->low < best_fit_len | |
2377 | /* The following comparison is designed to return the same | |
2378 | match as the previous algorithm for routines which have the | |
2379 | same best fit length. */ | |
2380 | || (arange->high - arange->low == best_fit_len | |
2381 | && funcinfo > best_fit)) | |
a13afe8e | 2382 | { |
089e3718 IT |
2383 | best_fit = funcinfo; |
2384 | best_fit_len = arange->high - arange->low; | |
a13afe8e | 2385 | } |
252b5132 | 2386 | } |
98591c73 | 2387 | |
089e3718 | 2388 | first++; |
a13afe8e | 2389 | } |
089e3718 IT |
2390 | |
2391 | if (!best_fit) | |
2392 | return FALSE; | |
2393 | ||
2394 | *function_ptr = best_fit; | |
2395 | return TRUE; | |
252b5132 RH |
2396 | } |
2397 | ||
5420f73d L |
2398 | /* If SYM at ADDR is within function table of UNIT, set FILENAME_PTR |
2399 | and LINENUMBER_PTR, and return TRUE. */ | |
2400 | ||
2401 | static bfd_boolean | |
2402 | lookup_symbol_in_function_table (struct comp_unit *unit, | |
2403 | asymbol *sym, | |
2404 | bfd_vma addr, | |
2405 | const char **filename_ptr, | |
2406 | unsigned int *linenumber_ptr) | |
2407 | { | |
2408 | struct funcinfo* each_func; | |
2409 | struct funcinfo* best_fit = NULL; | |
4ba3b326 | 2410 | bfd_vma best_fit_len = 0; |
5420f73d L |
2411 | struct arange *arange; |
2412 | const char *name = bfd_asymbol_name (sym); | |
2413 | asection *sec = bfd_get_section (sym); | |
2414 | ||
2415 | for (each_func = unit->function_table; | |
2416 | each_func; | |
2417 | each_func = each_func->prev_func) | |
2418 | { | |
2419 | for (arange = &each_func->arange; | |
2420 | arange; | |
2421 | arange = arange->next) | |
2422 | { | |
2423 | if ((!each_func->sec || each_func->sec == sec) | |
2424 | && addr >= arange->low | |
2425 | && addr < arange->high | |
650f284e | 2426 | && each_func->name |
5420f73d L |
2427 | && strcmp (name, each_func->name) == 0 |
2428 | && (!best_fit | |
4ba3b326 TG |
2429 | || arange->high - arange->low < best_fit_len)) |
2430 | { | |
2431 | best_fit = each_func; | |
2432 | best_fit_len = arange->high - arange->low; | |
2433 | } | |
5420f73d L |
2434 | } |
2435 | } | |
2436 | ||
2437 | if (best_fit) | |
2438 | { | |
2439 | best_fit->sec = sec; | |
2440 | *filename_ptr = best_fit->file; | |
2441 | *linenumber_ptr = best_fit->line; | |
2442 | return TRUE; | |
2443 | } | |
2444 | else | |
2445 | return FALSE; | |
2446 | } | |
2447 | ||
2448 | /* Variable table functions. */ | |
2449 | ||
2450 | /* If SYM is within variable table of UNIT, set FILENAME_PTR and | |
2451 | LINENUMBER_PTR, and return TRUE. */ | |
2452 | ||
2453 | static bfd_boolean | |
2454 | lookup_symbol_in_variable_table (struct comp_unit *unit, | |
2455 | asymbol *sym, | |
5cf2e3f0 | 2456 | bfd_vma addr, |
5420f73d L |
2457 | const char **filename_ptr, |
2458 | unsigned int *linenumber_ptr) | |
2459 | { | |
2460 | const char *name = bfd_asymbol_name (sym); | |
2461 | asection *sec = bfd_get_section (sym); | |
2462 | struct varinfo* each; | |
2463 | ||
2464 | for (each = unit->variable_table; each; each = each->prev_var) | |
2465 | if (each->stack == 0 | |
5cf2e3f0 L |
2466 | && each->file != NULL |
2467 | && each->name != NULL | |
2468 | && each->addr == addr | |
5420f73d L |
2469 | && (!each->sec || each->sec == sec) |
2470 | && strcmp (name, each->name) == 0) | |
2471 | break; | |
2472 | ||
2473 | if (each) | |
2474 | { | |
2475 | each->sec = sec; | |
2476 | *filename_ptr = each->file; | |
2477 | *linenumber_ptr = each->line; | |
2478 | return TRUE; | |
2479 | } | |
089e3718 IT |
2480 | |
2481 | return FALSE; | |
5420f73d L |
2482 | } |
2483 | ||
06f22d7e | 2484 | static char * |
5609a71e | 2485 | find_abstract_instance_name (struct comp_unit *unit, |
e00e8198 AM |
2486 | struct attribute *attr_ptr, |
2487 | bfd_boolean *is_linkage) | |
06f22d7e FF |
2488 | { |
2489 | bfd *abfd = unit->abfd; | |
f075ee0c | 2490 | bfd_byte *info_ptr; |
dbb3fbbb | 2491 | bfd_byte *info_ptr_end; |
06f22d7e FF |
2492 | unsigned int abbrev_number, bytes_read, i; |
2493 | struct abbrev_info *abbrev; | |
5609a71e | 2494 | bfd_uint64_t die_ref = attr_ptr->u.val; |
06f22d7e | 2495 | struct attribute attr; |
95e34fb4 | 2496 | char *name = NULL; |
06f22d7e | 2497 | |
5609a71e DJ |
2498 | /* DW_FORM_ref_addr can reference an entry in a different CU. It |
2499 | is an offset from the .debug_info section, not the current CU. */ | |
2500 | if (attr_ptr->form == DW_FORM_ref_addr) | |
2501 | { | |
2502 | /* We only support DW_FORM_ref_addr within the same file, so | |
2503 | any relocations should be resolved already. */ | |
2504 | if (!die_ref) | |
2505 | abort (); | |
2506 | ||
a358ecb8 | 2507 | info_ptr = unit->sec_info_ptr + die_ref; |
dbb3fbbb | 2508 | info_ptr_end = unit->end_ptr; |
0a9c7b2b NC |
2509 | |
2510 | /* Now find the CU containing this pointer. */ | |
2511 | if (info_ptr >= unit->info_ptr_unit && info_ptr < unit->end_ptr) | |
2512 | ; | |
2513 | else | |
2514 | { | |
2515 | /* Check other CUs to see if they contain the abbrev. */ | |
2516 | struct comp_unit * u; | |
2517 | ||
2518 | for (u = unit->prev_unit; u != NULL; u = u->prev_unit) | |
2519 | if (info_ptr >= u->info_ptr_unit && info_ptr < u->end_ptr) | |
2520 | break; | |
2521 | ||
2522 | if (u == NULL) | |
2523 | for (u = unit->next_unit; u != NULL; u = u->next_unit) | |
2524 | if (info_ptr >= u->info_ptr_unit && info_ptr < u->end_ptr) | |
2525 | break; | |
2526 | ||
2527 | if (u) | |
2528 | unit = u; | |
2529 | /* else FIXME: What do we do now ? */ | |
2530 | } | |
5609a71e | 2531 | } |
95e34fb4 NC |
2532 | else if (attr_ptr->form == DW_FORM_GNU_ref_alt) |
2533 | { | |
2534 | info_ptr = read_alt_indirect_ref (unit, die_ref); | |
2535 | if (info_ptr == NULL) | |
2536 | { | |
4eca0228 | 2537 | _bfd_error_handler |
95e34fb4 NC |
2538 | (_("Dwarf Error: Unable to read alt ref %u."), die_ref); |
2539 | bfd_set_error (bfd_error_bad_value); | |
e00e8198 | 2540 | return NULL; |
95e34fb4 | 2541 | } |
dbb3fbbb NC |
2542 | info_ptr_end = unit->stash->alt_dwarf_info_buffer + unit->stash->alt_dwarf_info_size; |
2543 | ||
0a9c7b2b NC |
2544 | /* FIXME: Do we need to locate the correct CU, in a similar |
2545 | fashion to the code in the DW_FORM_ref_addr case above ? */ | |
95e34fb4 | 2546 | } |
68ffbac6 | 2547 | else |
dbb3fbbb NC |
2548 | { |
2549 | info_ptr = unit->info_ptr_unit + die_ref; | |
2550 | info_ptr_end = unit->end_ptr; | |
2551 | } | |
95e34fb4 | 2552 | |
dbb3fbbb | 2553 | abbrev_number = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, info_ptr_end); |
06f22d7e FF |
2554 | info_ptr += bytes_read; |
2555 | ||
2556 | if (abbrev_number) | |
2557 | { | |
2558 | abbrev = lookup_abbrev (abbrev_number, unit->abbrevs); | |
2559 | if (! abbrev) | |
2560 | { | |
4eca0228 | 2561 | _bfd_error_handler |
a2a50954 | 2562 | (_("Dwarf Error: Could not find abbrev number %u."), abbrev_number); |
06f22d7e FF |
2563 | bfd_set_error (bfd_error_bad_value); |
2564 | } | |
2565 | else | |
2566 | { | |
d5cbaa15 | 2567 | for (i = 0; i < abbrev->num_attrs; ++i) |
06f22d7e | 2568 | { |
8af6b354 | 2569 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, |
dbb3fbbb | 2570 | info_ptr, info_ptr_end); |
8af6b354 AM |
2571 | if (info_ptr == NULL) |
2572 | break; | |
26bf4e33 FF |
2573 | switch (attr.name) |
2574 | { | |
2575 | case DW_AT_name: | |
643be349 JJ |
2576 | /* Prefer DW_AT_MIPS_linkage_name or DW_AT_linkage_name |
2577 | over DW_AT_name. */ | |
60d77146 | 2578 | if (name == NULL && is_str_attr (attr.form)) |
e00e8198 AM |
2579 | { |
2580 | name = attr.u.str; | |
2581 | if (non_mangled (unit->lang)) | |
2582 | *is_linkage = TRUE; | |
2583 | } | |
26bf4e33 FF |
2584 | break; |
2585 | case DW_AT_specification: | |
e00e8198 | 2586 | name = find_abstract_instance_name (unit, &attr, is_linkage); |
26bf4e33 | 2587 | break; |
643be349 | 2588 | case DW_AT_linkage_name: |
d5cbaa15 | 2589 | case DW_AT_MIPS_linkage_name: |
60d77146 NC |
2590 | /* PR 16949: Corrupt debug info can place |
2591 | non-string forms into these attributes. */ | |
6d74e8a1 | 2592 | if (is_str_attr (attr.form)) |
e00e8198 AM |
2593 | { |
2594 | name = attr.u.str; | |
2595 | *is_linkage = TRUE; | |
2596 | } | |
d5cbaa15 | 2597 | break; |
26bf4e33 FF |
2598 | default: |
2599 | break; | |
2600 | } | |
06f22d7e FF |
2601 | } |
2602 | } | |
2603 | } | |
8af6b354 | 2604 | return name; |
06f22d7e FF |
2605 | } |
2606 | ||
8af6b354 AM |
2607 | static bfd_boolean |
2608 | read_rangelist (struct comp_unit *unit, struct arange *arange, | |
2609 | bfd_uint64_t offset) | |
a13afe8e FF |
2610 | { |
2611 | bfd_byte *ranges_ptr; | |
dbb3fbbb | 2612 | bfd_byte *ranges_end; |
a13afe8e FF |
2613 | bfd_vma base_address = unit->base_address; |
2614 | ||
2615 | if (! unit->stash->dwarf_ranges_buffer) | |
2616 | { | |
2617 | if (! read_debug_ranges (unit)) | |
8af6b354 | 2618 | return FALSE; |
a13afe8e | 2619 | } |
d8d1c398 | 2620 | |
dbb3fbbb NC |
2621 | ranges_ptr = unit->stash->dwarf_ranges_buffer + offset; |
2622 | if (ranges_ptr < unit->stash->dwarf_ranges_buffer) | |
2623 | return FALSE; | |
2624 | ranges_end = unit->stash->dwarf_ranges_buffer + unit->stash->dwarf_ranges_size; | |
62f8d217 | 2625 | |
a13afe8e FF |
2626 | for (;;) |
2627 | { | |
2628 | bfd_vma low_pc; | |
2629 | bfd_vma high_pc; | |
2630 | ||
dbb3fbbb | 2631 | /* PR 17512: file: 62cada7d. */ |
62f8d217 | 2632 | if (ranges_ptr + 2 * unit->addr_size > ranges_end) |
dbb3fbbb NC |
2633 | return FALSE; |
2634 | ||
2635 | low_pc = read_address (unit, ranges_ptr, ranges_end); | |
13d72a14 | 2636 | ranges_ptr += unit->addr_size; |
dbb3fbbb | 2637 | high_pc = read_address (unit, ranges_ptr, ranges_end); |
13d72a14 AN |
2638 | ranges_ptr += unit->addr_size; |
2639 | ||
a13afe8e FF |
2640 | if (low_pc == 0 && high_pc == 0) |
2641 | break; | |
2642 | if (low_pc == -1UL && high_pc != -1UL) | |
2643 | base_address = high_pc; | |
2644 | else | |
8af6b354 | 2645 | { |
a2a50954 | 2646 | if (!arange_add (unit, arange, |
8af6b354 AM |
2647 | base_address + low_pc, base_address + high_pc)) |
2648 | return FALSE; | |
2649 | } | |
a13afe8e | 2650 | } |
8af6b354 | 2651 | return TRUE; |
a13afe8e FF |
2652 | } |
2653 | ||
a092b084 | 2654 | /* DWARF2 Compilation unit functions. */ |
252b5132 RH |
2655 | |
2656 | /* Scan over each die in a comp. unit looking for functions to add | |
34b5e0b2 | 2657 | to the function table and variables to the variable table. */ |
252b5132 | 2658 | |
b34976b6 | 2659 | static bfd_boolean |
5420f73d | 2660 | scan_unit_for_symbols (struct comp_unit *unit) |
252b5132 RH |
2661 | { |
2662 | bfd *abfd = unit->abfd; | |
f075ee0c | 2663 | bfd_byte *info_ptr = unit->first_child_die_ptr; |
dbb3fbbb | 2664 | bfd_byte *info_ptr_end = unit->stash->info_ptr_end; |
252b5132 | 2665 | int nesting_level = 1; |
c955f9cd JW |
2666 | struct funcinfo **nested_funcs; |
2667 | int nested_funcs_size; | |
2668 | ||
2669 | /* Maintain a stack of in-scope functions and inlined functions, which we | |
2670 | can use to set the caller_func field. */ | |
2671 | nested_funcs_size = 32; | |
a50b1753 | 2672 | nested_funcs = (struct funcinfo **) |
a2a50954 | 2673 | bfd_malloc (nested_funcs_size * sizeof (struct funcinfo *)); |
c955f9cd JW |
2674 | if (nested_funcs == NULL) |
2675 | return FALSE; | |
34b5e0b2 | 2676 | nested_funcs[nesting_level] = 0; |
252b5132 RH |
2677 | |
2678 | while (nesting_level) | |
2679 | { | |
2680 | unsigned int abbrev_number, bytes_read, i; | |
2681 | struct abbrev_info *abbrev; | |
2682 | struct attribute attr; | |
2683 | struct funcinfo *func; | |
5420f73d | 2684 | struct varinfo *var; |
a13afe8e FF |
2685 | bfd_vma low_pc = 0; |
2686 | bfd_vma high_pc = 0; | |
c49ead2f | 2687 | bfd_boolean high_pc_relative = FALSE; |
252b5132 | 2688 | |
877a8638 | 2689 | /* PR 17512: file: 9f405d9d. */ |
dbb3fbbb | 2690 | if (info_ptr >= info_ptr_end) |
877a8638 | 2691 | goto fail; |
62f8d217 | 2692 | |
dbb3fbbb | 2693 | abbrev_number = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, info_ptr_end); |
252b5132 RH |
2694 | info_ptr += bytes_read; |
2695 | ||
2696 | if (! abbrev_number) | |
2697 | { | |
2698 | nesting_level--; | |
2699 | continue; | |
2700 | } | |
98591c73 | 2701 | |
252b5132 RH |
2702 | abbrev = lookup_abbrev (abbrev_number,unit->abbrevs); |
2703 | if (! abbrev) | |
2704 | { | |
4eca0228 | 2705 | _bfd_error_handler |
8af6b354 AM |
2706 | (_("Dwarf Error: Could not find abbrev number %u."), |
2707 | abbrev_number); | |
252b5132 | 2708 | bfd_set_error (bfd_error_bad_value); |
8af6b354 | 2709 | goto fail; |
252b5132 | 2710 | } |
98591c73 | 2711 | |
5420f73d | 2712 | var = NULL; |
06f22d7e | 2713 | if (abbrev->tag == DW_TAG_subprogram |
5420f73d | 2714 | || abbrev->tag == DW_TAG_entry_point |
06f22d7e | 2715 | || abbrev->tag == DW_TAG_inlined_subroutine) |
252b5132 | 2716 | { |
dc810e39 | 2717 | bfd_size_type amt = sizeof (struct funcinfo); |
a50b1753 | 2718 | func = (struct funcinfo *) bfd_zalloc (abfd, amt); |
8af6b354 AM |
2719 | if (func == NULL) |
2720 | goto fail; | |
4ab527b0 | 2721 | func->tag = abbrev->tag; |
252b5132 RH |
2722 | func->prev_func = unit->function_table; |
2723 | unit->function_table = func; | |
089e3718 | 2724 | unit->number_of_functions++; |
bd210d54 | 2725 | BFD_ASSERT (!unit->cached); |
c955f9cd JW |
2726 | |
2727 | if (func->tag == DW_TAG_inlined_subroutine) | |
2728 | for (i = nesting_level - 1; i >= 1; i--) | |
2729 | if (nested_funcs[i]) | |
2730 | { | |
2731 | func->caller_func = nested_funcs[i]; | |
2732 | break; | |
2733 | } | |
2734 | nested_funcs[nesting_level] = func; | |
252b5132 RH |
2735 | } |
2736 | else | |
5420f73d L |
2737 | { |
2738 | func = NULL; | |
2739 | if (abbrev->tag == DW_TAG_variable) | |
2740 | { | |
2741 | bfd_size_type amt = sizeof (struct varinfo); | |
a50b1753 | 2742 | var = (struct varinfo *) bfd_zalloc (abfd, amt); |
8af6b354 AM |
2743 | if (var == NULL) |
2744 | goto fail; | |
5420f73d L |
2745 | var->tag = abbrev->tag; |
2746 | var->stack = 1; | |
2747 | var->prev_var = unit->variable_table; | |
2748 | unit->variable_table = var; | |
bd210d54 | 2749 | BFD_ASSERT (!unit->cached); |
5420f73d | 2750 | } |
c955f9cd JW |
2751 | |
2752 | /* No inline function in scope at this nesting level. */ | |
2753 | nested_funcs[nesting_level] = 0; | |
5420f73d | 2754 | } |
98591c73 | 2755 | |
252b5132 RH |
2756 | for (i = 0; i < abbrev->num_attrs; ++i) |
2757 | { | |
dbb3fbbb | 2758 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr, info_ptr_end); |
8af6b354 | 2759 | if (info_ptr == NULL) |
8ecc1f20 | 2760 | goto fail; |
98591c73 | 2761 | |
252b5132 RH |
2762 | if (func) |
2763 | { | |
2764 | switch (attr.name) | |
2765 | { | |
4ab527b0 | 2766 | case DW_AT_call_file: |
8af6b354 AM |
2767 | func->caller_file = concat_filename (unit->line_table, |
2768 | attr.u.val); | |
4ab527b0 FF |
2769 | break; |
2770 | ||
2771 | case DW_AT_call_line: | |
2772 | func->caller_line = attr.u.val; | |
2773 | break; | |
2774 | ||
06f22d7e | 2775 | case DW_AT_abstract_origin: |
5d8e6b4d | 2776 | case DW_AT_specification: |
e00e8198 AM |
2777 | func->name = find_abstract_instance_name (unit, &attr, |
2778 | &func->is_linkage); | |
06f22d7e FF |
2779 | break; |
2780 | ||
252b5132 | 2781 | case DW_AT_name: |
643be349 JJ |
2782 | /* Prefer DW_AT_MIPS_linkage_name or DW_AT_linkage_name |
2783 | over DW_AT_name. */ | |
60d77146 | 2784 | if (func->name == NULL && is_str_attr (attr.form)) |
e00e8198 AM |
2785 | { |
2786 | func->name = attr.u.str; | |
2787 | if (non_mangled (unit->lang)) | |
2788 | func->is_linkage = TRUE; | |
2789 | } | |
252b5132 | 2790 | break; |
98591c73 | 2791 | |
643be349 | 2792 | case DW_AT_linkage_name: |
252b5132 | 2793 | case DW_AT_MIPS_linkage_name: |
60d77146 NC |
2794 | /* PR 16949: Corrupt debug info can place |
2795 | non-string forms into these attributes. */ | |
2796 | if (is_str_attr (attr.form)) | |
e00e8198 AM |
2797 | { |
2798 | func->name = attr.u.str; | |
2799 | func->is_linkage = TRUE; | |
2800 | } | |
252b5132 RH |
2801 | break; |
2802 | ||
2803 | case DW_AT_low_pc: | |
a13afe8e | 2804 | low_pc = attr.u.val; |
252b5132 RH |
2805 | break; |
2806 | ||
2807 | case DW_AT_high_pc: | |
a13afe8e | 2808 | high_pc = attr.u.val; |
c49ead2f | 2809 | high_pc_relative = attr.form != DW_FORM_addr; |
a13afe8e FF |
2810 | break; |
2811 | ||
2812 | case DW_AT_ranges: | |
8af6b354 AM |
2813 | if (!read_rangelist (unit, &func->arange, attr.u.val)) |
2814 | goto fail; | |
252b5132 RH |
2815 | break; |
2816 | ||
5420f73d L |
2817 | case DW_AT_decl_file: |
2818 | func->file = concat_filename (unit->line_table, | |
2819 | attr.u.val); | |
2820 | break; | |
2821 | ||
2822 | case DW_AT_decl_line: | |
2823 | func->line = attr.u.val; | |
2824 | break; | |
2825 | ||
2826 | default: | |
2827 | break; | |
2828 | } | |
2829 | } | |
2830 | else if (var) | |
2831 | { | |
2832 | switch (attr.name) | |
2833 | { | |
2834 | case DW_AT_name: | |
2835 | var->name = attr.u.str; | |
2836 | break; | |
2837 | ||
2838 | case DW_AT_decl_file: | |
2839 | var->file = concat_filename (unit->line_table, | |
2840 | attr.u.val); | |
2841 | break; | |
2842 | ||
2843 | case DW_AT_decl_line: | |
2844 | var->line = attr.u.val; | |
2845 | break; | |
2846 | ||
2847 | case DW_AT_external: | |
2848 | if (attr.u.val != 0) | |
2849 | var->stack = 0; | |
2850 | break; | |
2851 | ||
2852 | case DW_AT_location: | |
5cf2e3f0 | 2853 | switch (attr.form) |
5420f73d | 2854 | { |
5cf2e3f0 L |
2855 | case DW_FORM_block: |
2856 | case DW_FORM_block1: | |
2857 | case DW_FORM_block2: | |
2858 | case DW_FORM_block4: | |
c07cbdd7 | 2859 | case DW_FORM_exprloc: |
5cf2e3f0 | 2860 | if (*attr.u.blk->data == DW_OP_addr) |
5420f73d | 2861 | { |
5cf2e3f0 | 2862 | var->stack = 0; |
98b880f4 JW |
2863 | |
2864 | /* Verify that DW_OP_addr is the only opcode in the | |
2865 | location, in which case the block size will be 1 | |
2866 | plus the address size. */ | |
2867 | /* ??? For TLS variables, gcc can emit | |
2868 | DW_OP_addr <addr> DW_OP_GNU_push_tls_address | |
2869 | which we don't handle here yet. */ | |
2870 | if (attr.u.blk->size == unit->addr_size + 1U) | |
2871 | var->addr = bfd_get (unit->addr_size * 8, | |
2872 | unit->abfd, | |
2873 | attr.u.blk->data + 1); | |
5420f73d | 2874 | } |
5cf2e3f0 | 2875 | break; |
d8d1c398 | 2876 | |
5cf2e3f0 L |
2877 | default: |
2878 | break; | |
5420f73d L |
2879 | } |
2880 | break; | |
2881 | ||
252b5132 RH |
2882 | default: |
2883 | break; | |
2884 | } | |
2885 | } | |
2886 | } | |
2887 | ||
c49ead2f MW |
2888 | if (high_pc_relative) |
2889 | high_pc += low_pc; | |
2890 | ||
a13afe8e FF |
2891 | if (func && high_pc != 0) |
2892 | { | |
a2a50954 | 2893 | if (!arange_add (unit, &func->arange, low_pc, high_pc)) |
8af6b354 | 2894 | goto fail; |
a13afe8e FF |
2895 | } |
2896 | ||
252b5132 | 2897 | if (abbrev->has_children) |
c955f9cd JW |
2898 | { |
2899 | nesting_level++; | |
2900 | ||
2901 | if (nesting_level >= nested_funcs_size) | |
2902 | { | |
2903 | struct funcinfo **tmp; | |
2904 | ||
2905 | nested_funcs_size *= 2; | |
a50b1753 | 2906 | tmp = (struct funcinfo **) |
a2a50954 AM |
2907 | bfd_realloc (nested_funcs, |
2908 | nested_funcs_size * sizeof (struct funcinfo *)); | |
c955f9cd | 2909 | if (tmp == NULL) |
8af6b354 | 2910 | goto fail; |
c955f9cd JW |
2911 | nested_funcs = tmp; |
2912 | } | |
2913 | nested_funcs[nesting_level] = 0; | |
2914 | } | |
252b5132 RH |
2915 | } |
2916 | ||
c955f9cd | 2917 | free (nested_funcs); |
b34976b6 | 2918 | return TRUE; |
8af6b354 AM |
2919 | |
2920 | fail: | |
2921 | free (nested_funcs); | |
2922 | return FALSE; | |
252b5132 RH |
2923 | } |
2924 | ||
5e38c3b8 MM |
2925 | /* Parse a DWARF2 compilation unit starting at INFO_PTR. This |
2926 | includes the compilation unit header that proceeds the DIE's, but | |
5c4491d3 | 2927 | does not include the length field that precedes each compilation |
5e38c3b8 | 2928 | unit header. END_PTR points one past the end of this comp unit. |
d03ba2a1 | 2929 | OFFSET_SIZE is the size of DWARF2 offsets (either 4 or 8 bytes). |
252b5132 RH |
2930 | |
2931 | This routine does not read the whole compilation unit; only enough | |
2932 | to get to the line number information for the compilation unit. */ | |
2933 | ||
2934 | static struct comp_unit * | |
0d161102 | 2935 | parse_comp_unit (struct dwarf2_debug *stash, |
818a27ac | 2936 | bfd_vma unit_length, |
f075ee0c | 2937 | bfd_byte *info_ptr_unit, |
818a27ac | 2938 | unsigned int offset_size) |
252b5132 RH |
2939 | { |
2940 | struct comp_unit* unit; | |
f46c2da6 | 2941 | unsigned int version; |
8ce8c090 | 2942 | bfd_uint64_t abbrev_offset = 0; |
f46c2da6 | 2943 | unsigned int addr_size; |
252b5132 | 2944 | struct abbrev_info** abbrevs; |
252b5132 RH |
2945 | unsigned int abbrev_number, bytes_read, i; |
2946 | struct abbrev_info *abbrev; | |
2947 | struct attribute attr; | |
f075ee0c AM |
2948 | bfd_byte *info_ptr = stash->info_ptr; |
2949 | bfd_byte *end_ptr = info_ptr + unit_length; | |
dc810e39 | 2950 | bfd_size_type amt; |
a13afe8e FF |
2951 | bfd_vma low_pc = 0; |
2952 | bfd_vma high_pc = 0; | |
a50b1753 | 2953 | bfd *abfd = stash->bfd_ptr; |
c49ead2f | 2954 | bfd_boolean high_pc_relative = FALSE; |
3fde5a36 | 2955 | |
dbb3fbbb | 2956 | version = read_2_bytes (abfd, info_ptr, end_ptr); |
252b5132 | 2957 | info_ptr += 2; |
d03ba2a1 JJ |
2958 | BFD_ASSERT (offset_size == 4 || offset_size == 8); |
2959 | if (offset_size == 4) | |
dbb3fbbb | 2960 | abbrev_offset = read_4_bytes (abfd, info_ptr, end_ptr); |
d03ba2a1 | 2961 | else |
dbb3fbbb | 2962 | abbrev_offset = read_8_bytes (abfd, info_ptr, end_ptr); |
d03ba2a1 | 2963 | info_ptr += offset_size; |
dbb3fbbb | 2964 | addr_size = read_1_byte (abfd, info_ptr, end_ptr); |
252b5132 RH |
2965 | info_ptr += 1; |
2966 | ||
c07cbdd7 | 2967 | if (version != 2 && version != 3 && version != 4) |
252b5132 | 2968 | { |
67f101ee NC |
2969 | /* PR 19872: A version number of 0 probably means that there is padding |
2970 | at the end of the .debug_info section. Gold puts it there when | |
2971 | performing an incremental link, for example. So do not generate | |
2972 | an error, just return a NULL. */ | |
2973 | if (version) | |
2974 | { | |
4eca0228 | 2975 | _bfd_error_handler |
67f101ee NC |
2976 | (_("Dwarf Error: found dwarf version '%u', this reader" |
2977 | " only handles version 2, 3 and 4 information."), version); | |
2978 | bfd_set_error (bfd_error_bad_value); | |
2979 | } | |
2980 | return NULL; | |
252b5132 RH |
2981 | } |
2982 | ||
2983 | if (addr_size > sizeof (bfd_vma)) | |
2984 | { | |
4eca0228 | 2985 | _bfd_error_handler |
695344c0 | 2986 | /* xgettext: c-format */ |
a2a50954 AM |
2987 | (_("Dwarf Error: found address size '%u', this reader" |
2988 | " can not handle sizes greater than '%u'."), | |
2989 | addr_size, | |
2990 | (unsigned int) sizeof (bfd_vma)); | |
252b5132 | 2991 | bfd_set_error (bfd_error_bad_value); |
67f101ee | 2992 | return NULL; |
252b5132 RH |
2993 | } |
2994 | ||
ecb651f0 | 2995 | if (addr_size != 2 && addr_size != 4 && addr_size != 8) |
252b5132 | 2996 | { |
4eca0228 | 2997 | _bfd_error_handler |
a2a50954 AM |
2998 | ("Dwarf Error: found address size '%u', this reader" |
2999 | " can only handle address sizes '2', '4' and '8'.", addr_size); | |
252b5132 | 3000 | bfd_set_error (bfd_error_bad_value); |
67f101ee | 3001 | return NULL; |
252b5132 RH |
3002 | } |
3003 | ||
a092b084 | 3004 | /* Read the abbrevs for this compilation unit into a table. */ |
51db3708 | 3005 | abbrevs = read_abbrevs (abfd, abbrev_offset, stash); |
252b5132 | 3006 | if (! abbrevs) |
67f101ee | 3007 | return NULL; |
252b5132 | 3008 | |
dbb3fbbb | 3009 | abbrev_number = safe_read_leb128 (abfd, info_ptr, &bytes_read, FALSE, end_ptr); |
252b5132 RH |
3010 | info_ptr += bytes_read; |
3011 | if (! abbrev_number) | |
3012 | { | |
67f101ee NC |
3013 | /* PR 19872: An abbrev number of 0 probably means that there is padding |
3014 | at the end of the .debug_abbrev section. Gold puts it there when | |
3015 | performing an incremental link, for example. So do not generate | |
3016 | an error, just return a NULL. */ | |
3017 | return NULL; | |
252b5132 RH |
3018 | } |
3019 | ||
3020 | abbrev = lookup_abbrev (abbrev_number, abbrevs); | |
3021 | if (! abbrev) | |
3022 | { | |
4eca0228 AM |
3023 | _bfd_error_handler (_("Dwarf Error: Could not find abbrev number %u."), |
3024 | abbrev_number); | |
252b5132 | 3025 | bfd_set_error (bfd_error_bad_value); |
67f101ee | 3026 | return NULL; |
252b5132 | 3027 | } |
98591c73 | 3028 | |
dc810e39 | 3029 | amt = sizeof (struct comp_unit); |
a50b1753 | 3030 | unit = (struct comp_unit *) bfd_zalloc (abfd, amt); |
8af6b354 AM |
3031 | if (unit == NULL) |
3032 | return NULL; | |
252b5132 | 3033 | unit->abfd = abfd; |
5609a71e | 3034 | unit->version = version; |
98591c73 | 3035 | unit->addr_size = addr_size; |
d03ba2a1 | 3036 | unit->offset_size = offset_size; |
252b5132 RH |
3037 | unit->abbrevs = abbrevs; |
3038 | unit->end_ptr = end_ptr; | |
d03ba2a1 | 3039 | unit->stash = stash; |
c0c28ab8 | 3040 | unit->info_ptr_unit = info_ptr_unit; |
a358ecb8 | 3041 | unit->sec_info_ptr = stash->sec_info_ptr; |
252b5132 RH |
3042 | |
3043 | for (i = 0; i < abbrev->num_attrs; ++i) | |
3044 | { | |
dbb3fbbb | 3045 | info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr, end_ptr); |
8af6b354 AM |
3046 | if (info_ptr == NULL) |
3047 | return NULL; | |
252b5132 RH |
3048 | |
3049 | /* Store the data if it is of an attribute we want to keep in a | |
3050 | partial symbol table. */ | |
3051 | switch (attr.name) | |
3052 | { | |
3053 | case DW_AT_stmt_list: | |
3054 | unit->stmtlist = 1; | |
482e2e37 | 3055 | unit->line_offset = attr.u.val; |
252b5132 RH |
3056 | break; |
3057 | ||
3058 | case DW_AT_name: | |
482e2e37 | 3059 | unit->name = attr.u.str; |
252b5132 RH |
3060 | break; |
3061 | ||
3062 | case DW_AT_low_pc: | |
a13afe8e FF |
3063 | low_pc = attr.u.val; |
3064 | /* If the compilation unit DIE has a DW_AT_low_pc attribute, | |
3065 | this is the base address to use when reading location | |
089e3718 | 3066 | lists or range lists. */ |
a2a50954 AM |
3067 | if (abbrev->tag == DW_TAG_compile_unit) |
3068 | unit->base_address = low_pc; | |
252b5132 RH |
3069 | break; |
3070 | ||
3071 | case DW_AT_high_pc: | |
a13afe8e | 3072 | high_pc = attr.u.val; |
c49ead2f | 3073 | high_pc_relative = attr.form != DW_FORM_addr; |
a13afe8e FF |
3074 | break; |
3075 | ||
3076 | case DW_AT_ranges: | |
8af6b354 AM |
3077 | if (!read_rangelist (unit, &unit->arange, attr.u.val)) |
3078 | return NULL; | |
252b5132 RH |
3079 | break; |
3080 | ||
3081 | case DW_AT_comp_dir: | |
3082 | { | |
f075ee0c | 3083 | char *comp_dir = attr.u.str; |
877a8638 NC |
3084 | |
3085 | /* PR 17512: file: 1fe726be. */ | |
3086 | if (! is_str_attr (attr.form)) | |
3087 | { | |
4eca0228 | 3088 | _bfd_error_handler |
877a8638 NC |
3089 | (_("Dwarf Error: DW_AT_comp_dir attribute encountered with a non-string form.")); |
3090 | comp_dir = NULL; | |
3091 | } | |
3092 | ||
252b5132 RH |
3093 | if (comp_dir) |
3094 | { | |
3095 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
3096 | directory, get rid of it. */ | |
818a27ac | 3097 | char *cp = strchr (comp_dir, ':'); |
252b5132 RH |
3098 | |
3099 | if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/') | |
3100 | comp_dir = cp + 1; | |
3101 | } | |
3102 | unit->comp_dir = comp_dir; | |
3103 | break; | |
3104 | } | |
3105 | ||
e00e8198 AM |
3106 | case DW_AT_language: |
3107 | unit->lang = attr.u.val; | |
3108 | break; | |
3109 | ||
252b5132 RH |
3110 | default: |
3111 | break; | |
3112 | } | |
3113 | } | |
c49ead2f MW |
3114 | if (high_pc_relative) |
3115 | high_pc += low_pc; | |
a13afe8e | 3116 | if (high_pc != 0) |
709d67f1 | 3117 | { |
a2a50954 | 3118 | if (!arange_add (unit, &unit->arange, low_pc, high_pc)) |
8af6b354 | 3119 | return NULL; |
709d67f1 | 3120 | } |
252b5132 RH |
3121 | |
3122 | unit->first_child_die_ptr = info_ptr; | |
3123 | return unit; | |
3124 | } | |
3125 | ||
6dd55cb7 L |
3126 | /* Return TRUE if UNIT may contain the address given by ADDR. When |
3127 | there are functions written entirely with inline asm statements, the | |
3128 | range info in the compilation unit header may not be correct. We | |
3129 | need to consult the line info table to see if a compilation unit | |
3130 | really contains the given address. */ | |
252b5132 | 3131 | |
b34976b6 | 3132 | static bfd_boolean |
818a27ac | 3133 | comp_unit_contains_address (struct comp_unit *unit, bfd_vma addr) |
252b5132 | 3134 | { |
709d67f1 AM |
3135 | struct arange *arange; |
3136 | ||
3137 | if (unit->error) | |
3138 | return FALSE; | |
3139 | ||
3140 | arange = &unit->arange; | |
3141 | do | |
3142 | { | |
3143 | if (addr >= arange->low && addr < arange->high) | |
3144 | return TRUE; | |
3145 | arange = arange->next; | |
3146 | } | |
3147 | while (arange); | |
3148 | ||
3149 | return FALSE; | |
252b5132 RH |
3150 | } |
3151 | ||
252b5132 RH |
3152 | /* If UNIT contains ADDR, set the output parameters to the values for |
3153 | the line containing ADDR. The output parameters, FILENAME_PTR, | |
e00e8198 | 3154 | FUNCTION_PTR, and LINENUMBER_PTR, are pointers to the objects |
98591c73 | 3155 | to be filled in. |
252b5132 | 3156 | |
240d6706 NC |
3157 | Returns the range of addresses covered by the entry that was used |
3158 | to fill in *LINENUMBER_PTR or 0 if it was not filled in. */ | |
252b5132 | 3159 | |
240d6706 | 3160 | static bfd_vma |
818a27ac AM |
3161 | comp_unit_find_nearest_line (struct comp_unit *unit, |
3162 | bfd_vma addr, | |
3163 | const char **filename_ptr, | |
e00e8198 | 3164 | struct funcinfo **function_ptr, |
818a27ac | 3165 | unsigned int *linenumber_ptr, |
9b8d1a36 | 3166 | unsigned int *discriminator_ptr, |
818a27ac | 3167 | struct dwarf2_debug *stash) |
252b5132 | 3168 | { |
b34976b6 | 3169 | bfd_boolean func_p; |
98591c73 | 3170 | |
252b5132 | 3171 | if (unit->error) |
b34976b6 | 3172 | return FALSE; |
252b5132 RH |
3173 | |
3174 | if (! unit->line_table) | |
3175 | { | |
3176 | if (! unit->stmtlist) | |
3177 | { | |
3178 | unit->error = 1; | |
b34976b6 | 3179 | return FALSE; |
252b5132 | 3180 | } |
98591c73 | 3181 | |
51db3708 | 3182 | unit->line_table = decode_line_info (unit, stash); |
252b5132 RH |
3183 | |
3184 | if (! unit->line_table) | |
3185 | { | |
3186 | unit->error = 1; | |
b34976b6 | 3187 | return FALSE; |
252b5132 | 3188 | } |
98591c73 | 3189 | |
3f5864e1 | 3190 | if (unit->first_child_die_ptr < unit->end_ptr |
5420f73d | 3191 | && ! scan_unit_for_symbols (unit)) |
252b5132 RH |
3192 | { |
3193 | unit->error = 1; | |
b34976b6 | 3194 | return FALSE; |
252b5132 RH |
3195 | } |
3196 | } | |
3197 | ||
e00e8198 AM |
3198 | *function_ptr = NULL; |
3199 | func_p = lookup_address_in_function_table (unit, addr, function_ptr); | |
3200 | if (func_p && (*function_ptr)->tag == DW_TAG_inlined_subroutine) | |
3201 | stash->inliner_chain = *function_ptr; | |
240d6706 NC |
3202 | |
3203 | return lookup_address_in_line_info_table (unit->line_table, addr, | |
3204 | filename_ptr, | |
3205 | linenumber_ptr, | |
3206 | discriminator_ptr); | |
252b5132 RH |
3207 | } |
3208 | ||
bd210d54 NC |
3209 | /* Check to see if line info is already decoded in a comp_unit. |
3210 | If not, decode it. Returns TRUE if no errors were encountered; | |
5420f73d L |
3211 | FALSE otherwise. */ |
3212 | ||
3213 | static bfd_boolean | |
bd210d54 NC |
3214 | comp_unit_maybe_decode_line_info (struct comp_unit *unit, |
3215 | struct dwarf2_debug *stash) | |
5420f73d L |
3216 | { |
3217 | if (unit->error) | |
3218 | return FALSE; | |
3219 | ||
3220 | if (! unit->line_table) | |
3221 | { | |
3222 | if (! unit->stmtlist) | |
3223 | { | |
3224 | unit->error = 1; | |
3225 | return FALSE; | |
3226 | } | |
3227 | ||
3228 | unit->line_table = decode_line_info (unit, stash); | |
3229 | ||
3230 | if (! unit->line_table) | |
3231 | { | |
3232 | unit->error = 1; | |
3233 | return FALSE; | |
3234 | } | |
3235 | ||
3236 | if (unit->first_child_die_ptr < unit->end_ptr | |
3237 | && ! scan_unit_for_symbols (unit)) | |
3238 | { | |
3239 | unit->error = 1; | |
3240 | return FALSE; | |
3241 | } | |
3242 | } | |
3243 | ||
bd210d54 NC |
3244 | return TRUE; |
3245 | } | |
3246 | ||
3247 | /* If UNIT contains SYM at ADDR, set the output parameters to the | |
3248 | values for the line containing SYM. The output parameters, | |
3249 | FILENAME_PTR, and LINENUMBER_PTR, are pointers to the objects to be | |
3250 | filled in. | |
3251 | ||
3252 | Return TRUE if UNIT contains SYM, and no errors were encountered; | |
3253 | FALSE otherwise. */ | |
3254 | ||
3255 | static bfd_boolean | |
3256 | comp_unit_find_line (struct comp_unit *unit, | |
3257 | asymbol *sym, | |
3258 | bfd_vma addr, | |
3259 | const char **filename_ptr, | |
3260 | unsigned int *linenumber_ptr, | |
3261 | struct dwarf2_debug *stash) | |
3262 | { | |
3263 | if (!comp_unit_maybe_decode_line_info (unit, stash)) | |
3264 | return FALSE; | |
3265 | ||
5420f73d L |
3266 | if (sym->flags & BSF_FUNCTION) |
3267 | return lookup_symbol_in_function_table (unit, sym, addr, | |
3268 | filename_ptr, | |
3269 | linenumber_ptr); | |
bd210d54 NC |
3270 | |
3271 | return lookup_symbol_in_variable_table (unit, sym, addr, | |
3272 | filename_ptr, | |
3273 | linenumber_ptr); | |
3274 | } | |
3275 | ||
3276 | static struct funcinfo * | |
3277 | reverse_funcinfo_list (struct funcinfo *head) | |
3278 | { | |
3279 | struct funcinfo *rhead; | |
3280 | struct funcinfo *temp; | |
3281 | ||
3282 | for (rhead = NULL; head; head = temp) | |
3283 | { | |
3284 | temp = head->prev_func; | |
3285 | head->prev_func = rhead; | |
3286 | rhead = head; | |
3287 | } | |
3288 | return rhead; | |
3289 | } | |
3290 | ||
3291 | static struct varinfo * | |
3292 | reverse_varinfo_list (struct varinfo *head) | |
3293 | { | |
3294 | struct varinfo *rhead; | |
3295 | struct varinfo *temp; | |
3296 | ||
3297 | for (rhead = NULL; head; head = temp) | |
3298 | { | |
3299 | temp = head->prev_var; | |
3300 | head->prev_var = rhead; | |
3301 | rhead = head; | |
3302 | } | |
3303 | return rhead; | |
3304 | } | |
3305 | ||
3306 | /* Extract all interesting funcinfos and varinfos of a compilation | |
3307 | unit into hash tables for faster lookup. Returns TRUE if no | |
3308 | errors were enountered; FALSE otherwise. */ | |
3309 | ||
3310 | static bfd_boolean | |
3311 | comp_unit_hash_info (struct dwarf2_debug *stash, | |
3312 | struct comp_unit *unit, | |
3313 | struct info_hash_table *funcinfo_hash_table, | |
3314 | struct info_hash_table *varinfo_hash_table) | |
3315 | { | |
3316 | struct funcinfo* each_func; | |
3317 | struct varinfo* each_var; | |
3318 | bfd_boolean okay = TRUE; | |
3319 | ||
3320 | BFD_ASSERT (stash->info_hash_status != STASH_INFO_HASH_DISABLED); | |
3321 | ||
3322 | if (!comp_unit_maybe_decode_line_info (unit, stash)) | |
3323 | return FALSE; | |
3324 | ||
3325 | BFD_ASSERT (!unit->cached); | |
3326 | ||
3327 | /* To preserve the original search order, we went to visit the function | |
3328 | infos in the reversed order of the list. However, making the list | |
3329 | bi-directional use quite a bit of extra memory. So we reverse | |
3330 | the list first, traverse the list in the now reversed order and | |
3331 | finally reverse the list again to get back the original order. */ | |
3332 | unit->function_table = reverse_funcinfo_list (unit->function_table); | |
3333 | for (each_func = unit->function_table; | |
3334 | each_func && okay; | |
3335 | each_func = each_func->prev_func) | |
3336 | { | |
089e3718 | 3337 | /* Skip nameless functions. */ |
bd210d54 NC |
3338 | if (each_func->name) |
3339 | /* There is no need to copy name string into hash table as | |
3340 | name string is either in the dwarf string buffer or | |
3341 | info in the stash. */ | |
3342 | okay = insert_info_hash_table (funcinfo_hash_table, each_func->name, | |
3343 | (void*) each_func, FALSE); | |
3344 | } | |
3345 | unit->function_table = reverse_funcinfo_list (unit->function_table); | |
3346 | if (!okay) | |
3347 | return FALSE; | |
3348 | ||
3349 | /* We do the same for variable infos. */ | |
3350 | unit->variable_table = reverse_varinfo_list (unit->variable_table); | |
3351 | for (each_var = unit->variable_table; | |
3352 | each_var && okay; | |
3353 | each_var = each_var->prev_var) | |
3354 | { | |
3355 | /* Skip stack vars and vars with no files or names. */ | |
3356 | if (each_var->stack == 0 | |
3357 | && each_var->file != NULL | |
3358 | && each_var->name != NULL) | |
3359 | /* There is no need to copy name string into hash table as | |
3360 | name string is either in the dwarf string buffer or | |
3361 | info in the stash. */ | |
3362 | okay = insert_info_hash_table (varinfo_hash_table, each_var->name, | |
3363 | (void*) each_var, FALSE); | |
3364 | } | |
3365 | ||
3366 | unit->variable_table = reverse_varinfo_list (unit->variable_table); | |
3367 | unit->cached = TRUE; | |
3368 | return okay; | |
5420f73d L |
3369 | } |
3370 | ||
e2f6d277 NC |
3371 | /* Locate a section in a BFD containing debugging info. The search starts |
3372 | from the section after AFTER_SEC, or from the first section in the BFD if | |
3373 | AFTER_SEC is NULL. The search works by examining the names of the | |
fc28f9aa TG |
3374 | sections. There are three permissiable names. The first two are given |
3375 | by DEBUG_SECTIONS[debug_info] (whose standard DWARF2 names are .debug_info | |
3376 | and .zdebug_info). The third is a prefix .gnu.linkonce.wi. | |
e2f6d277 NC |
3377 | This is a variation on the .debug_info section which has a checksum |
3378 | describing the contents appended onto the name. This allows the linker to | |
3379 | identify and discard duplicate debugging sections for different | |
3380 | compilation units. */ | |
a092b084 NC |
3381 | #define GNU_LINKONCE_INFO ".gnu.linkonce.wi." |
3382 | ||
3383 | static asection * | |
fc28f9aa | 3384 | find_debug_info (bfd *abfd, const struct dwarf_debug_section *debug_sections, |
93ee1e36 | 3385 | asection *after_sec) |
a092b084 | 3386 | { |
a2a50954 AM |
3387 | asection *msec; |
3388 | const char *look; | |
3389 | ||
3390 | if (after_sec == NULL) | |
3391 | { | |
3392 | look = debug_sections[debug_info].uncompressed_name; | |
3393 | msec = bfd_get_section_by_name (abfd, look); | |
3394 | if (msec != NULL) | |
3395 | return msec; | |
a092b084 | 3396 | |
a2a50954 AM |
3397 | look = debug_sections[debug_info].compressed_name; |
3398 | if (look != NULL) | |
3399 | { | |
3400 | msec = bfd_get_section_by_name (abfd, look); | |
3401 | if (msec != NULL) | |
3402 | return msec; | |
3403 | } | |
a092b084 | 3404 | |
a2a50954 AM |
3405 | for (msec = abfd->sections; msec != NULL; msec = msec->next) |
3406 | if (CONST_STRNEQ (msec->name, GNU_LINKONCE_INFO)) | |
3407 | return msec; | |
3408 | ||
3409 | return NULL; | |
3410 | } | |
3411 | ||
3412 | for (msec = after_sec->next; msec != NULL; msec = msec->next) | |
a092b084 | 3413 | { |
a2a50954 AM |
3414 | look = debug_sections[debug_info].uncompressed_name; |
3415 | if (strcmp (msec->name, look) == 0) | |
a092b084 NC |
3416 | return msec; |
3417 | ||
a2a50954 AM |
3418 | look = debug_sections[debug_info].compressed_name; |
3419 | if (look != NULL && strcmp (msec->name, look) == 0) | |
1b315056 CS |
3420 | return msec; |
3421 | ||
0112cd26 | 3422 | if (CONST_STRNEQ (msec->name, GNU_LINKONCE_INFO)) |
a092b084 | 3423 | return msec; |
a092b084 NC |
3424 | } |
3425 | ||
3426 | return NULL; | |
3427 | } | |
3428 | ||
93ee1e36 AM |
3429 | /* Transfer VMAs from object file to separate debug file. */ |
3430 | ||
3431 | static void | |
3432 | set_debug_vma (bfd *orig_bfd, bfd *debug_bfd) | |
3433 | { | |
3434 | asection *s, *d; | |
3435 | ||
3436 | for (s = orig_bfd->sections, d = debug_bfd->sections; | |
3437 | s != NULL && d != NULL; | |
3438 | s = s->next, d = d->next) | |
3439 | { | |
3440 | if ((d->flags & SEC_DEBUGGING) != 0) | |
3441 | break; | |
3442 | /* ??? Assumes 1-1 correspondence between sections in the | |
3443 | two files. */ | |
3444 | if (strcmp (s->name, d->name) == 0) | |
3445 | { | |
3446 | d->output_section = s->output_section; | |
3447 | d->output_offset = s->output_offset; | |
3448 | d->vma = s->vma; | |
3449 | } | |
3450 | } | |
3451 | } | |
3452 | ||
5609a71e | 3453 | /* Unset vmas for adjusted sections in STASH. */ |
d4c32a81 L |
3454 | |
3455 | static void | |
3456 | unset_sections (struct dwarf2_debug *stash) | |
3457 | { | |
93ee1e36 | 3458 | int i; |
5609a71e | 3459 | struct adjusted_section *p; |
d4c32a81 | 3460 | |
5609a71e DJ |
3461 | i = stash->adjusted_section_count; |
3462 | p = stash->adjusted_sections; | |
d4c32a81 L |
3463 | for (; i > 0; i--, p++) |
3464 | p->section->vma = 0; | |
3465 | } | |
3466 | ||
93ee1e36 AM |
3467 | /* Set VMAs for allocated and .debug_info sections in ORIG_BFD, a |
3468 | relocatable object file. VMAs are normally all zero in relocatable | |
3469 | object files, so if we want to distinguish locations in sections by | |
3470 | address we need to set VMAs so the sections do not overlap. We | |
3471 | also set VMA on .debug_info so that when we have multiple | |
3472 | .debug_info sections (or the linkonce variant) they also do not | |
3473 | overlap. The multiple .debug_info sections make up a single | |
3474 | logical section. ??? We should probably do the same for other | |
3475 | debug sections. */ | |
35ccda9e L |
3476 | |
3477 | static bfd_boolean | |
93ee1e36 | 3478 | place_sections (bfd *orig_bfd, struct dwarf2_debug *stash) |
35ccda9e | 3479 | { |
93ee1e36 | 3480 | bfd *abfd; |
5609a71e | 3481 | struct adjusted_section *p; |
93ee1e36 AM |
3482 | int i; |
3483 | const char *debug_info_name; | |
d4c32a81 | 3484 | |
5609a71e | 3485 | if (stash->adjusted_section_count != 0) |
35ccda9e | 3486 | { |
5609a71e DJ |
3487 | i = stash->adjusted_section_count; |
3488 | p = stash->adjusted_sections; | |
d4c32a81 L |
3489 | for (; i > 0; i--, p++) |
3490 | p->section->vma = p->adj_vma; | |
93ee1e36 | 3491 | return TRUE; |
d4c32a81 | 3492 | } |
93ee1e36 AM |
3493 | |
3494 | debug_info_name = stash->debug_sections[debug_info].uncompressed_name; | |
3495 | i = 0; | |
3496 | abfd = orig_bfd; | |
3497 | while (1) | |
d4c32a81 L |
3498 | { |
3499 | asection *sect; | |
35ccda9e | 3500 | |
d4c32a81 | 3501 | for (sect = abfd->sections; sect != NULL; sect = sect->next) |
35ccda9e | 3502 | { |
5609a71e DJ |
3503 | int is_debug_info; |
3504 | ||
cd0449ab | 3505 | if ((sect->output_section != NULL |
93ee1e36 AM |
3506 | && sect->output_section != sect |
3507 | && (sect->flags & SEC_DEBUGGING) == 0) | |
cd0449ab | 3508 | || sect->vma != 0) |
5609a71e DJ |
3509 | continue; |
3510 | ||
93ee1e36 AM |
3511 | is_debug_info = (strcmp (sect->name, debug_info_name) == 0 |
3512 | || CONST_STRNEQ (sect->name, GNU_LINKONCE_INFO)); | |
d4c32a81 | 3513 | |
93ee1e36 AM |
3514 | if (!((sect->flags & SEC_ALLOC) != 0 && abfd == orig_bfd) |
3515 | && !is_debug_info) | |
d4c32a81 L |
3516 | continue; |
3517 | ||
3518 | i++; | |
3519 | } | |
93ee1e36 AM |
3520 | if (abfd == stash->bfd_ptr) |
3521 | break; | |
3522 | abfd = stash->bfd_ptr; | |
3523 | } | |
3524 | ||
3525 | if (i <= 1) | |
3526 | stash->adjusted_section_count = -1; | |
3527 | else | |
3528 | { | |
3529 | bfd_vma last_vma = 0, last_dwarf = 0; | |
3530 | bfd_size_type amt = i * sizeof (struct adjusted_section); | |
d4c32a81 | 3531 | |
93ee1e36 AM |
3532 | p = (struct adjusted_section *) bfd_malloc (amt); |
3533 | if (p == NULL) | |
d4c32a81 L |
3534 | return FALSE; |
3535 | ||
5609a71e DJ |
3536 | stash->adjusted_sections = p; |
3537 | stash->adjusted_section_count = i; | |
d4c32a81 | 3538 | |
93ee1e36 AM |
3539 | abfd = orig_bfd; |
3540 | while (1) | |
d4c32a81 | 3541 | { |
93ee1e36 | 3542 | asection *sect; |
d4c32a81 | 3543 | |
93ee1e36 AM |
3544 | for (sect = abfd->sections; sect != NULL; sect = sect->next) |
3545 | { | |
3546 | bfd_size_type sz; | |
3547 | int is_debug_info; | |
5609a71e | 3548 | |
93ee1e36 AM |
3549 | if ((sect->output_section != NULL |
3550 | && sect->output_section != sect | |
3551 | && (sect->flags & SEC_DEBUGGING) == 0) | |
3552 | || sect->vma != 0) | |
3553 | continue; | |
5609a71e | 3554 | |
93ee1e36 AM |
3555 | is_debug_info = (strcmp (sect->name, debug_info_name) == 0 |
3556 | || CONST_STRNEQ (sect->name, GNU_LINKONCE_INFO)); | |
d4c32a81 | 3557 | |
93ee1e36 AM |
3558 | if (!((sect->flags & SEC_ALLOC) != 0 && abfd == orig_bfd) |
3559 | && !is_debug_info) | |
3560 | continue; | |
d4c32a81 | 3561 | |
93ee1e36 | 3562 | sz = sect->rawsize ? sect->rawsize : sect->size; |
5609a71e | 3563 | |
93ee1e36 AM |
3564 | if (is_debug_info) |
3565 | { | |
3566 | BFD_ASSERT (sect->alignment_power == 0); | |
3567 | sect->vma = last_dwarf; | |
3568 | last_dwarf += sz; | |
3569 | } | |
3570 | else | |
3571 | { | |
3572 | /* Align the new address to the current section | |
3573 | alignment. */ | |
3574 | last_vma = ((last_vma | |
29f628db DV |
3575 | + ~(-((bfd_vma) 1 << sect->alignment_power))) |
3576 | & (-((bfd_vma) 1 << sect->alignment_power))); | |
93ee1e36 AM |
3577 | sect->vma = last_vma; |
3578 | last_vma += sz; | |
3579 | } | |
d4c32a81 | 3580 | |
93ee1e36 AM |
3581 | p->section = sect; |
3582 | p->adj_vma = sect->vma; | |
3583 | p++; | |
3584 | } | |
3585 | if (abfd == stash->bfd_ptr) | |
3586 | break; | |
3587 | abfd = stash->bfd_ptr; | |
35ccda9e L |
3588 | } |
3589 | } | |
3590 | ||
93ee1e36 AM |
3591 | if (orig_bfd != stash->bfd_ptr) |
3592 | set_debug_vma (orig_bfd, stash->bfd_ptr); | |
3593 | ||
35ccda9e L |
3594 | return TRUE; |
3595 | } | |
3596 | ||
bd210d54 NC |
3597 | /* Look up a funcinfo by name using the given info hash table. If found, |
3598 | also update the locations pointed to by filename_ptr and linenumber_ptr. | |
3599 | ||
3600 | This function returns TRUE if a funcinfo that matches the given symbol | |
3601 | and address is found with any error; otherwise it returns FALSE. */ | |
3602 | ||
3603 | static bfd_boolean | |
3604 | info_hash_lookup_funcinfo (struct info_hash_table *hash_table, | |
3605 | asymbol *sym, | |
3606 | bfd_vma addr, | |
3607 | const char **filename_ptr, | |
3608 | unsigned int *linenumber_ptr) | |
3609 | { | |
3610 | struct funcinfo* each_func; | |
3611 | struct funcinfo* best_fit = NULL; | |
4ba3b326 | 3612 | bfd_vma best_fit_len = 0; |
bd210d54 NC |
3613 | struct info_list_node *node; |
3614 | struct arange *arange; | |
3615 | const char *name = bfd_asymbol_name (sym); | |
3616 | asection *sec = bfd_get_section (sym); | |
3617 | ||
3618 | for (node = lookup_info_hash_table (hash_table, name); | |
3619 | node; | |
3620 | node = node->next) | |
3621 | { | |
a50b1753 | 3622 | each_func = (struct funcinfo *) node->info; |
bd210d54 NC |
3623 | for (arange = &each_func->arange; |
3624 | arange; | |
3625 | arange = arange->next) | |
3626 | { | |
3627 | if ((!each_func->sec || each_func->sec == sec) | |
3628 | && addr >= arange->low | |
3629 | && addr < arange->high | |
3630 | && (!best_fit | |
4ba3b326 TG |
3631 | || arange->high - arange->low < best_fit_len)) |
3632 | { | |
3633 | best_fit = each_func; | |
3634 | best_fit_len = arange->high - arange->low; | |
3635 | } | |
bd210d54 NC |
3636 | } |
3637 | } | |
3638 | ||
3639 | if (best_fit) | |
3640 | { | |
3641 | best_fit->sec = sec; | |
3642 | *filename_ptr = best_fit->file; | |
3643 | *linenumber_ptr = best_fit->line; | |
3644 | return TRUE; | |
3645 | } | |
3646 | ||
3647 | return FALSE; | |
3648 | } | |
3649 | ||
3650 | /* Look up a varinfo by name using the given info hash table. If found, | |
3651 | also update the locations pointed to by filename_ptr and linenumber_ptr. | |
3652 | ||
3653 | This function returns TRUE if a varinfo that matches the given symbol | |
3654 | and address is found with any error; otherwise it returns FALSE. */ | |
3655 | ||
3656 | static bfd_boolean | |
3657 | info_hash_lookup_varinfo (struct info_hash_table *hash_table, | |
3658 | asymbol *sym, | |
3659 | bfd_vma addr, | |
3660 | const char **filename_ptr, | |
3661 | unsigned int *linenumber_ptr) | |
3662 | { | |
3663 | const char *name = bfd_asymbol_name (sym); | |
3664 | asection *sec = bfd_get_section (sym); | |
3665 | struct varinfo* each; | |
3666 | struct info_list_node *node; | |
3667 | ||
3668 | for (node = lookup_info_hash_table (hash_table, name); | |
3669 | node; | |
3670 | node = node->next) | |
3671 | { | |
a50b1753 | 3672 | each = (struct varinfo *) node->info; |
bd210d54 NC |
3673 | if (each->addr == addr |
3674 | && (!each->sec || each->sec == sec)) | |
3675 | { | |
3676 | each->sec = sec; | |
3677 | *filename_ptr = each->file; | |
3678 | *linenumber_ptr = each->line; | |
3679 | return TRUE; | |
3680 | } | |
3681 | } | |
3682 | ||
3683 | return FALSE; | |
3684 | } | |
3685 | ||
3686 | /* Update the funcinfo and varinfo info hash tables if they are | |
3687 | not up to date. Returns TRUE if there is no error; otherwise | |
3688 | returns FALSE and disable the info hash tables. */ | |
3689 | ||
3690 | static bfd_boolean | |
3691 | stash_maybe_update_info_hash_tables (struct dwarf2_debug *stash) | |
3692 | { | |
3693 | struct comp_unit *each; | |
3694 | ||
3695 | /* Exit if hash tables are up-to-date. */ | |
3696 | if (stash->all_comp_units == stash->hash_units_head) | |
3697 | return TRUE; | |
3698 | ||
3699 | if (stash->hash_units_head) | |
3700 | each = stash->hash_units_head->prev_unit; | |
3701 | else | |
3702 | each = stash->last_comp_unit; | |
3703 | ||
3704 | while (each) | |
3705 | { | |
3706 | if (!comp_unit_hash_info (stash, each, stash->funcinfo_hash_table, | |
3707 | stash->varinfo_hash_table)) | |
3708 | { | |
3709 | stash->info_hash_status = STASH_INFO_HASH_DISABLED; | |
3710 | return FALSE; | |
3711 | } | |
3712 | each = each->prev_unit; | |
3713 | } | |
3714 | ||
3715 | stash->hash_units_head = stash->all_comp_units; | |
3716 | return TRUE; | |
3717 | } | |
3718 | ||
089e3718 | 3719 | /* Check consistency of info hash tables. This is for debugging only. */ |
bd210d54 NC |
3720 | |
3721 | static void ATTRIBUTE_UNUSED | |
3722 | stash_verify_info_hash_table (struct dwarf2_debug *stash) | |
3723 | { | |
3724 | struct comp_unit *each_unit; | |
3725 | struct funcinfo *each_func; | |
3726 | struct varinfo *each_var; | |
3727 | struct info_list_node *node; | |
3728 | bfd_boolean found; | |
3729 | ||
3730 | for (each_unit = stash->all_comp_units; | |
3731 | each_unit; | |
3732 | each_unit = each_unit->next_unit) | |
3733 | { | |
3734 | for (each_func = each_unit->function_table; | |
3735 | each_func; | |
3736 | each_func = each_func->prev_func) | |
3737 | { | |
3738 | if (!each_func->name) | |
3739 | continue; | |
3740 | node = lookup_info_hash_table (stash->funcinfo_hash_table, | |
3741 | each_func->name); | |
3742 | BFD_ASSERT (node); | |
3743 | found = FALSE; | |
3744 | while (node && !found) | |
3745 | { | |
3746 | found = node->info == each_func; | |
3747 | node = node->next; | |
3748 | } | |
3749 | BFD_ASSERT (found); | |
3750 | } | |
3751 | ||
3752 | for (each_var = each_unit->variable_table; | |
3753 | each_var; | |
3754 | each_var = each_var->prev_var) | |
3755 | { | |
3756 | if (!each_var->name || !each_var->file || each_var->stack) | |
3757 | continue; | |
3758 | node = lookup_info_hash_table (stash->varinfo_hash_table, | |
3759 | each_var->name); | |
3760 | BFD_ASSERT (node); | |
3761 | found = FALSE; | |
3762 | while (node && !found) | |
3763 | { | |
3764 | found = node->info == each_var; | |
3765 | node = node->next; | |
3766 | } | |
3767 | BFD_ASSERT (found); | |
3768 | } | |
3769 | } | |
3770 | } | |
3771 | ||
3772 | /* Check to see if we want to enable the info hash tables, which consume | |
3773 | quite a bit of memory. Currently we only check the number times | |
3774 | bfd_dwarf2_find_line is called. In the future, we may also want to | |
3775 | take the number of symbols into account. */ | |
3776 | ||
3777 | static void | |
3778 | stash_maybe_enable_info_hash_tables (bfd *abfd, struct dwarf2_debug *stash) | |
3779 | { | |
3780 | BFD_ASSERT (stash->info_hash_status == STASH_INFO_HASH_OFF); | |
3781 | ||
3782 | if (stash->info_hash_count++ < STASH_INFO_HASH_TRIGGER) | |
3783 | return; | |
3784 | ||
3785 | /* FIXME: Maybe we should check the reduce_memory_overheads | |
3786 | and optimize fields in the bfd_link_info structure ? */ | |
3787 | ||
3788 | /* Create hash tables. */ | |
3789 | stash->funcinfo_hash_table = create_info_hash_table (abfd); | |
3790 | stash->varinfo_hash_table = create_info_hash_table (abfd); | |
3791 | if (!stash->funcinfo_hash_table || !stash->varinfo_hash_table) | |
3792 | { | |
3793 | /* Turn off info hashes if any allocation above fails. */ | |
3794 | stash->info_hash_status = STASH_INFO_HASH_DISABLED; | |
3795 | return; | |
3796 | } | |
3797 | /* We need a forced update so that the info hash tables will | |
3798 | be created even though there is no compilation unit. That | |
3799 | happens if STASH_INFO_HASH_TRIGGER is 0. */ | |
3800 | stash_maybe_update_info_hash_tables (stash); | |
3801 | stash->info_hash_status = STASH_INFO_HASH_ON; | |
3802 | } | |
3803 | ||
3804 | /* Find the file and line associated with a symbol and address using the | |
3805 | info hash tables of a stash. If there is a match, the function returns | |
3806 | TRUE and update the locations pointed to by filename_ptr and linenumber_ptr; | |
3807 | otherwise it returns FALSE. */ | |
3808 | ||
3809 | static bfd_boolean | |
3810 | stash_find_line_fast (struct dwarf2_debug *stash, | |
3811 | asymbol *sym, | |
3812 | bfd_vma addr, | |
3813 | const char **filename_ptr, | |
3814 | unsigned int *linenumber_ptr) | |
3815 | { | |
3816 | BFD_ASSERT (stash->info_hash_status == STASH_INFO_HASH_ON); | |
3817 | ||
3818 | if (sym->flags & BSF_FUNCTION) | |
3819 | return info_hash_lookup_funcinfo (stash->funcinfo_hash_table, sym, addr, | |
3820 | filename_ptr, linenumber_ptr); | |
3821 | return info_hash_lookup_varinfo (stash->varinfo_hash_table, sym, addr, | |
3822 | filename_ptr, linenumber_ptr); | |
3823 | } | |
3824 | ||
cd0449ab AM |
3825 | /* Save current section VMAs. */ |
3826 | ||
3827 | static bfd_boolean | |
3828 | save_section_vma (const bfd *abfd, struct dwarf2_debug *stash) | |
3829 | { | |
3830 | asection *s; | |
3831 | unsigned int i; | |
3832 | ||
3833 | if (abfd->section_count == 0) | |
3834 | return TRUE; | |
3835 | stash->sec_vma = bfd_malloc (sizeof (*stash->sec_vma) * abfd->section_count); | |
3836 | if (stash->sec_vma == NULL) | |
3837 | return FALSE; | |
3838 | for (i = 0, s = abfd->sections; i < abfd->section_count; i++, s = s->next) | |
3839 | { | |
3840 | if (s->output_section != NULL) | |
3841 | stash->sec_vma[i] = s->output_section->vma + s->output_offset; | |
3842 | else | |
3843 | stash->sec_vma[i] = s->vma; | |
3844 | } | |
3845 | return TRUE; | |
3846 | } | |
3847 | ||
3848 | /* Compare current section VMAs against those at the time the stash | |
3849 | was created. If find_nearest_line is used in linker warnings or | |
3850 | errors early in the link process, the debug info stash will be | |
3851 | invalid for later calls. This is because we relocate debug info | |
3852 | sections, so the stashed section contents depend on symbol values, | |
3853 | which in turn depend on section VMAs. */ | |
3854 | ||
3855 | static bfd_boolean | |
3856 | section_vma_same (const bfd *abfd, const struct dwarf2_debug *stash) | |
3857 | { | |
3858 | asection *s; | |
3859 | unsigned int i; | |
3860 | ||
3861 | for (i = 0, s = abfd->sections; i < abfd->section_count; i++, s = s->next) | |
3862 | { | |
3863 | bfd_vma vma; | |
3864 | ||
3865 | if (s->output_section != NULL) | |
3866 | vma = s->output_section->vma + s->output_offset; | |
3867 | else | |
3868 | vma = s->vma; | |
3869 | if (vma != stash->sec_vma[i]) | |
3870 | return FALSE; | |
3871 | } | |
3872 | return TRUE; | |
3873 | } | |
3874 | ||
2ca7691a TG |
3875 | /* Read debug information from DEBUG_BFD when DEBUG_BFD is specified. |
3876 | If DEBUG_BFD is not specified, we read debug information from ABFD | |
3877 | or its gnu_debuglink. The results will be stored in PINFO. | |
3878 | The function returns TRUE iff debug information is ready. */ | |
3879 | ||
3880 | bfd_boolean | |
3881 | _bfd_dwarf2_slurp_debug_info (bfd *abfd, bfd *debug_bfd, | |
93ee1e36 AM |
3882 | const struct dwarf_debug_section *debug_sections, |
3883 | asymbol **symbols, | |
3884 | void **pinfo, | |
3885 | bfd_boolean do_place) | |
2ca7691a TG |
3886 | { |
3887 | bfd_size_type amt = sizeof (struct dwarf2_debug); | |
3888 | bfd_size_type total_size; | |
3889 | asection *msec; | |
3890 | struct dwarf2_debug *stash = (struct dwarf2_debug *) *pinfo; | |
3891 | ||
3892 | if (stash != NULL) | |
cd0449ab | 3893 | { |
93ee1e36 | 3894 | if (section_vma_same (abfd, stash)) |
cd0449ab AM |
3895 | return TRUE; |
3896 | _bfd_dwarf2_cleanup_debug_info (abfd, pinfo); | |
3897 | memset (stash, 0, amt); | |
3898 | } | |
3899 | else | |
3900 | { | |
3901 | stash = (struct dwarf2_debug *) bfd_zalloc (abfd, amt); | |
3902 | if (! stash) | |
3903 | return FALSE; | |
3904 | } | |
2ca7691a | 3905 | stash->debug_sections = debug_sections; |
1c37913d | 3906 | stash->syms = symbols; |
cd0449ab AM |
3907 | if (!save_section_vma (abfd, stash)) |
3908 | return FALSE; | |
2ca7691a TG |
3909 | |
3910 | *pinfo = stash; | |
3911 | ||
3912 | if (debug_bfd == NULL) | |
3913 | debug_bfd = abfd; | |
3914 | ||
3915 | msec = find_debug_info (debug_bfd, debug_sections, NULL); | |
3916 | if (msec == NULL && abfd == debug_bfd) | |
3917 | { | |
3918 | char * debug_filename = bfd_follow_gnu_debuglink (abfd, DEBUGDIR); | |
3919 | ||
3920 | if (debug_filename == NULL) | |
3921 | /* No dwarf2 info, and no gnu_debuglink to follow. | |
3922 | Note that at this point the stash has been allocated, but | |
3923 | contains zeros. This lets future calls to this function | |
3924 | fail more quickly. */ | |
3925 | return FALSE; | |
3926 | ||
bf150a0b | 3927 | /* Set BFD_DECOMPRESS to decompress debug sections. */ |
2ca7691a | 3928 | if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL |
bf150a0b L |
3929 | || !(debug_bfd->flags |= BFD_DECOMPRESS, |
3930 | bfd_check_format (debug_bfd, bfd_object)) | |
2ca7691a | 3931 | || (msec = find_debug_info (debug_bfd, |
93ee1e36 AM |
3932 | debug_sections, NULL)) == NULL |
3933 | || !bfd_generic_link_read_symbols (debug_bfd)) | |
2ca7691a TG |
3934 | { |
3935 | if (debug_bfd) | |
3936 | bfd_close (debug_bfd); | |
3937 | /* FIXME: Should we report our failure to follow the debuglink ? */ | |
3938 | free (debug_filename); | |
3939 | return FALSE; | |
3940 | } | |
93ee1e36 AM |
3941 | |
3942 | symbols = bfd_get_outsymbols (debug_bfd); | |
3943 | stash->syms = symbols; | |
1c37913d | 3944 | stash->close_on_cleanup = TRUE; |
2ca7691a | 3945 | } |
1c37913d | 3946 | stash->bfd_ptr = debug_bfd; |
2ca7691a | 3947 | |
93ee1e36 AM |
3948 | if (do_place |
3949 | && !place_sections (abfd, stash)) | |
3950 | return FALSE; | |
3951 | ||
2ca7691a TG |
3952 | /* There can be more than one DWARF2 info section in a BFD these |
3953 | days. First handle the easy case when there's only one. If | |
3954 | there's more than one, try case two: none of the sections is | |
3955 | compressed. In that case, read them all in and produce one | |
3956 | large stash. We do this in two passes - in the first pass we | |
3957 | just accumulate the section sizes, and in the second pass we | |
3958 | read in the section's contents. (The allows us to avoid | |
3959 | reallocing the data as we add sections to the stash.) If | |
3960 | some or all sections are compressed, then do things the slow | |
3961 | way, with a bunch of reallocs. */ | |
3962 | ||
3963 | if (! find_debug_info (debug_bfd, debug_sections, msec)) | |
3964 | { | |
3965 | /* Case 1: only one info section. */ | |
3966 | total_size = msec->size; | |
3967 | if (! read_section (debug_bfd, &stash->debug_sections[debug_info], | |
3968 | symbols, 0, | |
3969 | &stash->info_ptr_memory, &total_size)) | |
3970 | return FALSE; | |
3971 | } | |
3972 | else | |
3973 | { | |
3974 | /* Case 2: multiple sections. */ | |
3975 | for (total_size = 0; | |
3976 | msec; | |
3977 | msec = find_debug_info (debug_bfd, debug_sections, msec)) | |
3978 | total_size += msec->size; | |
3979 | ||
3980 | stash->info_ptr_memory = (bfd_byte *) bfd_malloc (total_size); | |
3981 | if (stash->info_ptr_memory == NULL) | |
3982 | return FALSE; | |
3983 | ||
3984 | total_size = 0; | |
3985 | for (msec = find_debug_info (debug_bfd, debug_sections, NULL); | |
3986 | msec; | |
3987 | msec = find_debug_info (debug_bfd, debug_sections, msec)) | |
3988 | { | |
3989 | bfd_size_type size; | |
3990 | ||
3991 | size = msec->size; | |
3992 | if (size == 0) | |
3993 | continue; | |
3994 | ||
3995 | if (!(bfd_simple_get_relocated_section_contents | |
3996 | (debug_bfd, msec, stash->info_ptr_memory + total_size, | |
3997 | symbols))) | |
3998 | return FALSE; | |
3999 | ||
4000 | total_size += size; | |
4001 | } | |
4002 | } | |
4003 | ||
4004 | stash->info_ptr = stash->info_ptr_memory; | |
4005 | stash->info_ptr_end = stash->info_ptr + total_size; | |
4006 | stash->sec = find_debug_info (debug_bfd, debug_sections, NULL); | |
4007 | stash->sec_info_ptr = stash->info_ptr; | |
2ca7691a TG |
4008 | return TRUE; |
4009 | } | |
4010 | ||
425bd9e1 NC |
4011 | /* Scan the debug information in PINFO looking for a DW_TAG_subprogram |
4012 | abbrev with a DW_AT_low_pc attached to it. Then lookup that same | |
4013 | symbol in SYMBOLS and return the difference between the low_pc and | |
4014 | the symbol's address. Returns 0 if no suitable symbol could be found. */ | |
4015 | ||
4016 | bfd_signed_vma | |
4017 | _bfd_dwarf2_find_symbol_bias (asymbol ** symbols, void ** pinfo) | |
4018 | { | |
4019 | struct dwarf2_debug *stash; | |
4020 | struct comp_unit * unit; | |
4021 | ||
4022 | stash = (struct dwarf2_debug *) *pinfo; | |
4023 | ||
4024 | if (stash == NULL) | |
4025 | return 0; | |
4026 | ||
4027 | for (unit = stash->all_comp_units; unit; unit = unit->next_unit) | |
4028 | { | |
4029 | struct funcinfo * func; | |
4030 | ||
4031 | if (unit->function_table == NULL) | |
4032 | { | |
4033 | if (unit->line_table == NULL) | |
4034 | unit->line_table = decode_line_info (unit, stash); | |
4035 | if (unit->line_table != NULL) | |
4036 | scan_unit_for_symbols (unit); | |
4037 | } | |
4038 | ||
4039 | for (func = unit->function_table; func != NULL; func = func->prev_func) | |
4040 | if (func->name && func->arange.low) | |
4041 | { | |
4042 | asymbol ** psym; | |
4043 | ||
4044 | /* FIXME: Do we need to scan the aranges looking for the lowest pc value ? */ | |
4045 | ||
4046 | for (psym = symbols; * psym != NULL; psym++) | |
4047 | { | |
4048 | asymbol * sym = * psym; | |
4049 | ||
4050 | if (sym->flags & BSF_FUNCTION | |
4051 | && sym->section != NULL | |
4052 | && strcmp (sym->name, func->name) == 0) | |
4053 | return ((bfd_signed_vma) func->arange.low) - | |
4054 | ((bfd_signed_vma) (sym->value + sym->section->vma)); | |
4055 | } | |
4056 | } | |
4057 | } | |
4058 | ||
4059 | return 0; | |
4060 | } | |
4061 | ||
bec42b15 NC |
4062 | /* Find the source code location of SYMBOL. If SYMBOL is NULL |
4063 | then find the nearest source code location corresponding to | |
4064 | the address SECTION + OFFSET. | |
4065 | Returns TRUE if the line is found without error and fills in | |
4066 | FILENAME_PTR and LINENUMBER_PTR. In the case where SYMBOL was | |
4067 | NULL the FUNCTIONNAME_PTR is also filled in. | |
4068 | SYMBOLS contains the symbol table for ABFD. | |
fc28f9aa | 4069 | DEBUG_SECTIONS contains the name of the dwarf debug sections. |
bec42b15 NC |
4070 | ADDR_SIZE is the number of bytes in the initial .debug_info length |
4071 | field and in the abbreviation offset, or zero to indicate that the | |
4072 | default value should be used. */ | |
252b5132 | 4073 | |
fb167eb2 AM |
4074 | bfd_boolean |
4075 | _bfd_dwarf2_find_nearest_line (bfd *abfd, | |
4076 | asymbol **symbols, | |
4077 | asymbol *symbol, | |
4078 | asection *section, | |
4079 | bfd_vma offset, | |
4080 | const char **filename_ptr, | |
4081 | const char **functionname_ptr, | |
4082 | unsigned int *linenumber_ptr, | |
4083 | unsigned int *discriminator_ptr, | |
4084 | const struct dwarf_debug_section *debug_sections, | |
4085 | unsigned int addr_size, | |
4086 | void **pinfo) | |
252b5132 RH |
4087 | { |
4088 | /* Read each compilation unit from the section .debug_info, and check | |
4089 | to see if it contains the address we are searching for. If yes, | |
4090 | lookup the address, and return the line number info. If no, go | |
98591c73 | 4091 | on to the next compilation unit. |
252b5132 RH |
4092 | |
4093 | We keep a list of all the previously read compilation units, and | |
98591c73 | 4094 | a pointer to the next un-read compilation unit. Check the |
a092b084 | 4095 | previously read units before reading more. */ |
1ba54ee0 | 4096 | struct dwarf2_debug *stash; |
a092b084 | 4097 | /* What address are we looking for? */ |
1ba54ee0 | 4098 | bfd_vma addr; |
252b5132 | 4099 | struct comp_unit* each; |
e00e8198 | 4100 | struct funcinfo *function = NULL; |
240d6706 | 4101 | bfd_boolean found = FALSE; |
bec42b15 | 4102 | bfd_boolean do_line; |
d4c32a81 | 4103 | |
2ca7691a TG |
4104 | *filename_ptr = NULL; |
4105 | if (functionname_ptr != NULL) | |
4106 | *functionname_ptr = NULL; | |
4107 | *linenumber_ptr = 0; | |
f725daa8 CC |
4108 | if (discriminator_ptr) |
4109 | *discriminator_ptr = 0; | |
d4c32a81 | 4110 | |
93ee1e36 AM |
4111 | if (! _bfd_dwarf2_slurp_debug_info (abfd, NULL, debug_sections, |
4112 | symbols, pinfo, | |
4113 | (abfd->flags & (EXEC_P | DYNAMIC)) == 0)) | |
2ca7691a | 4114 | return FALSE; |
d4c32a81 | 4115 | |
2ca7691a | 4116 | stash = (struct dwarf2_debug *) *pinfo; |
d4c32a81 | 4117 | |
fb167eb2 | 4118 | do_line = symbol != NULL; |
bec42b15 NC |
4119 | if (do_line) |
4120 | { | |
fb167eb2 | 4121 | BFD_ASSERT (section == NULL && offset == 0 && functionname_ptr == NULL); |
bec42b15 | 4122 | section = bfd_get_section (symbol); |
fb167eb2 | 4123 | addr = symbol->value; |
bec42b15 | 4124 | } |
bec42b15 | 4125 | else |
fb167eb2 AM |
4126 | { |
4127 | BFD_ASSERT (section != NULL && functionname_ptr != NULL); | |
4128 | addr = offset; | |
4129 | } | |
bec42b15 | 4130 | |
1ba54ee0 | 4131 | if (section->output_section) |
6dd55cb7 | 4132 | addr += section->output_section->vma + section->output_offset; |
1ba54ee0 | 4133 | else |
6dd55cb7 | 4134 | addr += section->vma; |
a092b084 | 4135 | |
98591c73 | 4136 | /* A null info_ptr indicates that there is no dwarf2 info |
a092b084 | 4137 | (or that an error occured while setting up the stash). */ |
252b5132 | 4138 | if (! stash->info_ptr) |
2ca7691a | 4139 | return FALSE; |
252b5132 | 4140 | |
4ab527b0 FF |
4141 | stash->inliner_chain = NULL; |
4142 | ||
a092b084 | 4143 | /* Check the previously read comp. units first. */ |
bd210d54 NC |
4144 | if (do_line) |
4145 | { | |
4146 | /* The info hash tables use quite a bit of memory. We may not want to | |
4147 | always use them. We use some heuristics to decide if and when to | |
4148 | turn it on. */ | |
4149 | if (stash->info_hash_status == STASH_INFO_HASH_OFF) | |
4150 | stash_maybe_enable_info_hash_tables (abfd, stash); | |
4151 | ||
4152 | /* Keep info hash table up to date if they are available. Note that we | |
089e3718 | 4153 | may disable the hash tables if there is any error duing update. */ |
bd210d54 NC |
4154 | if (stash->info_hash_status == STASH_INFO_HASH_ON) |
4155 | stash_maybe_update_info_hash_tables (stash); | |
4156 | ||
4157 | if (stash->info_hash_status == STASH_INFO_HASH_ON) | |
4158 | { | |
4159 | found = stash_find_line_fast (stash, symbol, addr, filename_ptr, | |
4160 | linenumber_ptr); | |
4161 | if (found) | |
4162 | goto done; | |
4163 | } | |
0d161102 | 4164 | else |
bd210d54 NC |
4165 | { |
4166 | /* Check the previously read comp. units first. */ | |
4167 | for (each = stash->all_comp_units; each; each = each->next_unit) | |
4168 | if ((symbol->flags & BSF_FUNCTION) == 0 | |
a2a50954 | 4169 | || each->arange.high == 0 |
bd210d54 NC |
4170 | || comp_unit_contains_address (each, addr)) |
4171 | { | |
4172 | found = comp_unit_find_line (each, symbol, addr, filename_ptr, | |
4173 | linenumber_ptr, stash); | |
4174 | if (found) | |
4175 | goto done; | |
4176 | } | |
4177 | } | |
4178 | } | |
4179 | else | |
4180 | { | |
240d6706 NC |
4181 | bfd_vma min_range = (bfd_vma) -1; |
4182 | const char * local_filename = NULL; | |
e00e8198 | 4183 | struct funcinfo *local_function = NULL; |
240d6706 NC |
4184 | unsigned int local_linenumber = 0; |
4185 | unsigned int local_discriminator = 0; | |
96691246 | 4186 | |
709d67f1 AM |
4187 | for (each = stash->all_comp_units; each; each = each->next_unit) |
4188 | { | |
240d6706 NC |
4189 | bfd_vma range = (bfd_vma) -1; |
4190 | ||
a2a50954 AM |
4191 | found = ((each->arange.high == 0 |
4192 | || comp_unit_contains_address (each, addr)) | |
240d6706 NC |
4193 | && (range = comp_unit_find_nearest_line (each, addr, |
4194 | & local_filename, | |
e00e8198 | 4195 | & local_function, |
240d6706 NC |
4196 | & local_linenumber, |
4197 | & local_discriminator, | |
4198 | stash)) != 0); | |
709d67f1 | 4199 | if (found) |
240d6706 NC |
4200 | { |
4201 | /* PRs 15935 15994: Bogus debug information may have provided us | |
4202 | with an erroneous match. We attempt to counter this by | |
4203 | selecting the match that has the smallest address range | |
4204 | associated with it. (We are assuming that corrupt debug info | |
4205 | will tend to result in extra large address ranges rather than | |
4206 | extra small ranges). | |
4207 | ||
4208 | This does mean that we scan through all of the CUs associated | |
4209 | with the bfd each time this function is called. But this does | |
4210 | have the benefit of producing consistent results every time the | |
4211 | function is called. */ | |
4212 | if (range <= min_range) | |
4213 | { | |
4214 | if (filename_ptr && local_filename) | |
4215 | * filename_ptr = local_filename; | |
e00e8198 AM |
4216 | if (local_function) |
4217 | function = local_function; | |
240d6706 NC |
4218 | if (discriminator_ptr && local_discriminator) |
4219 | * discriminator_ptr = local_discriminator; | |
4220 | if (local_linenumber) | |
4221 | * linenumber_ptr = local_linenumber; | |
4222 | min_range = range; | |
4223 | } | |
4224 | } | |
4225 | } | |
4226 | ||
4227 | if (* linenumber_ptr) | |
4228 | { | |
4229 | found = TRUE; | |
4230 | goto done; | |
709d67f1 | 4231 | } |
5420f73d L |
4232 | } |
4233 | ||
5420f73d L |
4234 | /* The DWARF2 spec says that the initial length field, and the |
4235 | offset of the abbreviation table, should both be 4-byte values. | |
4236 | However, some compilers do things differently. */ | |
4237 | if (addr_size == 0) | |
4238 | addr_size = 4; | |
4239 | BFD_ASSERT (addr_size == 4 || addr_size == 8); | |
4240 | ||
4241 | /* Read each remaining comp. units checking each as they are read. */ | |
4242 | while (stash->info_ptr < stash->info_ptr_end) | |
4243 | { | |
4244 | bfd_vma length; | |
4245 | unsigned int offset_size = addr_size; | |
4246 | bfd_byte *info_ptr_unit = stash->info_ptr; | |
4247 | ||
dbb3fbbb | 4248 | length = read_4_bytes (stash->bfd_ptr, stash->info_ptr, stash->info_ptr_end); |
bec42b15 NC |
4249 | /* A 0xffffff length is the DWARF3 way of indicating |
4250 | we use 64-bit offsets, instead of 32-bit offsets. */ | |
5420f73d L |
4251 | if (length == 0xffffffff) |
4252 | { | |
4253 | offset_size = 8; | |
dbb3fbbb | 4254 | length = read_8_bytes (stash->bfd_ptr, stash->info_ptr + 4, stash->info_ptr_end); |
5420f73d L |
4255 | stash->info_ptr += 12; |
4256 | } | |
4257 | /* A zero length is the IRIX way of indicating 64-bit offsets, | |
4258 | mostly because the 64-bit length will generally fit in 32 | |
4259 | bits, and the endianness helps. */ | |
4260 | else if (length == 0) | |
4261 | { | |
4262 | offset_size = 8; | |
dbb3fbbb | 4263 | length = read_4_bytes (stash->bfd_ptr, stash->info_ptr + 4, stash->info_ptr_end); |
5420f73d L |
4264 | stash->info_ptr += 8; |
4265 | } | |
024b2372 CD |
4266 | /* In the absence of the hints above, we assume 32-bit DWARF2 |
4267 | offsets even for targets with 64-bit addresses, because: | |
4268 | a) most of the time these targets will not have generated | |
4269 | more than 2Gb of debug info and so will not need 64-bit | |
4270 | offsets, | |
4271 | and | |
4272 | b) if they do use 64-bit offsets but they are not using | |
4273 | the size hints that are tested for above then they are | |
4274 | not conforming to the DWARF3 standard anyway. */ | |
5420f73d L |
4275 | else if (addr_size == 8) |
4276 | { | |
024b2372 | 4277 | offset_size = 4; |
2d47a72c | 4278 | stash->info_ptr += 4; |
5420f73d L |
4279 | } |
4280 | else | |
4281 | stash->info_ptr += 4; | |
4282 | ||
4283 | if (length > 0) | |
4284 | { | |
dbb3fbbb NC |
4285 | bfd_byte * new_ptr; |
4286 | ||
0d161102 | 4287 | each = parse_comp_unit (stash, length, info_ptr_unit, |
5420f73d | 4288 | offset_size); |
d74e4b29 NS |
4289 | if (!each) |
4290 | /* The dwarf information is damaged, don't trust it any | |
4291 | more. */ | |
4292 | break; | |
5420f73d | 4293 | |
dbb3fbbb NC |
4294 | new_ptr = stash->info_ptr + length; |
4295 | /* PR 17512: file: 1500698c. */ | |
4296 | if (new_ptr < stash->info_ptr) | |
4297 | { | |
4298 | /* A corrupt length value - do not trust the info any more. */ | |
4299 | found = FALSE; | |
4300 | break; | |
4301 | } | |
62f8d217 | 4302 | else |
dbb3fbbb | 4303 | stash->info_ptr = new_ptr; |
62f8d217 | 4304 | |
d74e4b29 NS |
4305 | if (stash->all_comp_units) |
4306 | stash->all_comp_units->prev_unit = each; | |
4307 | else | |
4308 | stash->last_comp_unit = each; | |
68ffbac6 | 4309 | |
d74e4b29 NS |
4310 | each->next_unit = stash->all_comp_units; |
4311 | stash->all_comp_units = each; | |
68ffbac6 | 4312 | |
d74e4b29 NS |
4313 | /* DW_AT_low_pc and DW_AT_high_pc are optional for |
4314 | compilation units. If we don't have them (i.e., | |
4315 | unit->high == 0), we need to consult the line info table | |
4316 | to see if a compilation unit contains the given | |
4317 | address. */ | |
4318 | if (do_line) | |
4319 | found = (((symbol->flags & BSF_FUNCTION) == 0 | |
4320 | || each->arange.high == 0 | |
4321 | || comp_unit_contains_address (each, addr)) | |
4322 | && comp_unit_find_line (each, symbol, addr, | |
4323 | filename_ptr, | |
4324 | linenumber_ptr, | |
4325 | stash)); | |
4326 | else | |
4327 | found = ((each->arange.high == 0 | |
4328 | || comp_unit_contains_address (each, addr)) | |
4329 | && comp_unit_find_nearest_line (each, addr, | |
4330 | filename_ptr, | |
e00e8198 | 4331 | &function, |
d74e4b29 | 4332 | linenumber_ptr, |
9b8d1a36 | 4333 | discriminator_ptr, |
fa15f18d | 4334 | stash) != 0); |
be04437d AM |
4335 | |
4336 | if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr) | |
4337 | == stash->sec->size) | |
4338 | { | |
fc28f9aa | 4339 | stash->sec = find_debug_info (stash->bfd_ptr, debug_sections, |
93ee1e36 | 4340 | stash->sec); |
be04437d AM |
4341 | stash->sec_info_ptr = stash->info_ptr; |
4342 | } | |
4343 | ||
d74e4b29 NS |
4344 | if (found) |
4345 | goto done; | |
5420f73d L |
4346 | } |
4347 | } | |
4348 | ||
a2a50954 | 4349 | done: |
e00e8198 AM |
4350 | if (function) |
4351 | { | |
923b198a | 4352 | if (!function->is_linkage) |
e00e8198 | 4353 | { |
923b198a AM |
4354 | asymbol *fun; |
4355 | bfd_vma sec_vma; | |
4356 | ||
4357 | fun = _bfd_elf_find_function (abfd, symbols, section, offset, | |
4358 | *filename_ptr ? NULL : filename_ptr, | |
4359 | functionname_ptr); | |
4360 | sec_vma = section->vma; | |
4361 | if (section->output_section != NULL) | |
4362 | sec_vma = section->output_section->vma + section->output_offset; | |
4363 | if (fun != NULL | |
4364 | && fun->value + sec_vma == function->arange.low) | |
4365 | function->name = *functionname_ptr; | |
4366 | /* Even if we didn't find a linkage name, say that we have | |
4367 | to stop a repeated search of symbols. */ | |
e00e8198 AM |
4368 | function->is_linkage = TRUE; |
4369 | } | |
923b198a | 4370 | *functionname_ptr = function->name; |
e00e8198 | 4371 | } |
d4c32a81 L |
4372 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) |
4373 | unset_sections (stash); | |
4374 | ||
4375 | return found; | |
5420f73d L |
4376 | } |
4377 | ||
4ab527b0 FF |
4378 | bfd_boolean |
4379 | _bfd_dwarf2_find_inliner_info (bfd *abfd ATTRIBUTE_UNUSED, | |
4380 | const char **filename_ptr, | |
4381 | const char **functionname_ptr, | |
4382 | unsigned int *linenumber_ptr, | |
4383 | void **pinfo) | |
4384 | { | |
4385 | struct dwarf2_debug *stash; | |
4386 | ||
a50b1753 | 4387 | stash = (struct dwarf2_debug *) *pinfo; |
4ab527b0 FF |
4388 | if (stash) |
4389 | { | |
4390 | struct funcinfo *func = stash->inliner_chain; | |
bec42b15 | 4391 | |
4ab527b0 FF |
4392 | if (func && func->caller_func) |
4393 | { | |
4394 | *filename_ptr = func->caller_file; | |
4395 | *functionname_ptr = func->caller_func->name; | |
4396 | *linenumber_ptr = func->caller_line; | |
4397 | stash->inliner_chain = func->caller_func; | |
bec42b15 | 4398 | return TRUE; |
4ab527b0 FF |
4399 | } |
4400 | } | |
4401 | ||
bec42b15 | 4402 | return FALSE; |
4ab527b0 FF |
4403 | } |
4404 | ||
35330cce | 4405 | void |
d9071b0c | 4406 | _bfd_dwarf2_cleanup_debug_info (bfd *abfd, void **pinfo) |
35330cce | 4407 | { |
5bb3703f | 4408 | struct dwarf2_debug *stash = (struct dwarf2_debug *) *pinfo; |
35330cce | 4409 | struct comp_unit *each; |
35330cce | 4410 | |
d9071b0c | 4411 | if (abfd == NULL || stash == NULL) |
35330cce NC |
4412 | return; |
4413 | ||
4414 | for (each = stash->all_comp_units; each; each = each->next_unit) | |
4415 | { | |
34b5e0b2 | 4416 | struct abbrev_info **abbrevs = each->abbrevs; |
90b5b1a5 NC |
4417 | struct funcinfo *function_table = each->function_table; |
4418 | struct varinfo *variable_table = each->variable_table; | |
34b5e0b2 | 4419 | size_t i; |
35330cce | 4420 | |
34b5e0b2 | 4421 | for (i = 0; i < ABBREV_HASH_SIZE; i++) |
d8d1c398 | 4422 | { |
34b5e0b2 | 4423 | struct abbrev_info *abbrev = abbrevs[i]; |
35330cce | 4424 | |
34b5e0b2 | 4425 | while (abbrev) |
d8d1c398 | 4426 | { |
34b5e0b2 NC |
4427 | free (abbrev->attrs); |
4428 | abbrev = abbrev->next; | |
d8d1c398 AM |
4429 | } |
4430 | } | |
35330cce NC |
4431 | |
4432 | if (each->line_table) | |
d8d1c398 | 4433 | { |
34b5e0b2 NC |
4434 | free (each->line_table->dirs); |
4435 | free (each->line_table->files); | |
d8d1c398 | 4436 | } |
90b5b1a5 NC |
4437 | |
4438 | while (function_table) | |
4439 | { | |
4440 | if (function_table->file) | |
4441 | { | |
4442 | free (function_table->file); | |
4443 | function_table->file = NULL; | |
4444 | } | |
4445 | ||
4446 | if (function_table->caller_file) | |
4447 | { | |
4448 | free (function_table->caller_file); | |
4449 | function_table->caller_file = NULL; | |
4450 | } | |
4451 | function_table = function_table->prev_func; | |
4452 | } | |
4453 | ||
089e3718 IT |
4454 | if (each->lookup_funcinfo_table) |
4455 | { | |
4456 | free (each->lookup_funcinfo_table); | |
4457 | each->lookup_funcinfo_table = NULL; | |
4458 | } | |
4459 | ||
90b5b1a5 NC |
4460 | while (variable_table) |
4461 | { | |
4462 | if (variable_table->file) | |
4463 | { | |
4464 | free (variable_table->file); | |
4465 | variable_table->file = NULL; | |
4466 | } | |
4467 | ||
4468 | variable_table = variable_table->prev_var; | |
4469 | } | |
35330cce NC |
4470 | } |
4471 | ||
5d0900eb AM |
4472 | if (stash->dwarf_abbrev_buffer) |
4473 | free (stash->dwarf_abbrev_buffer); | |
4474 | if (stash->dwarf_line_buffer) | |
4475 | free (stash->dwarf_line_buffer); | |
4476 | if (stash->dwarf_str_buffer) | |
4477 | free (stash->dwarf_str_buffer); | |
4478 | if (stash->dwarf_ranges_buffer) | |
4479 | free (stash->dwarf_ranges_buffer); | |
4480 | if (stash->info_ptr_memory) | |
4481 | free (stash->info_ptr_memory); | |
1c37913d AM |
4482 | if (stash->close_on_cleanup) |
4483 | bfd_close (stash->bfd_ptr); | |
95e34fb4 NC |
4484 | if (stash->alt_dwarf_str_buffer) |
4485 | free (stash->alt_dwarf_str_buffer); | |
4486 | if (stash->alt_dwarf_info_buffer) | |
4487 | free (stash->alt_dwarf_info_buffer); | |
cd0449ab AM |
4488 | if (stash->sec_vma) |
4489 | free (stash->sec_vma); | |
93ee1e36 AM |
4490 | if (stash->adjusted_sections) |
4491 | free (stash->adjusted_sections); | |
95e34fb4 NC |
4492 | if (stash->alt_bfd_ptr) |
4493 | bfd_close (stash->alt_bfd_ptr); | |
35330cce | 4494 | } |
e00e8198 AM |
4495 | |
4496 | /* Find the function to a particular section and offset, | |
4497 | for error reporting. */ | |
4498 | ||
923b198a | 4499 | asymbol * |
e00e8198 AM |
4500 | _bfd_elf_find_function (bfd *abfd, |
4501 | asymbol **symbols, | |
4502 | asection *section, | |
4503 | bfd_vma offset, | |
4504 | const char **filename_ptr, | |
4505 | const char **functionname_ptr) | |
4506 | { | |
4507 | struct elf_find_function_cache | |
4508 | { | |
4509 | asection *last_section; | |
4510 | asymbol *func; | |
4511 | const char *filename; | |
4512 | bfd_size_type func_size; | |
4513 | } *cache; | |
4514 | ||
4515 | if (symbols == NULL) | |
923b198a | 4516 | return NULL; |
e00e8198 AM |
4517 | |
4518 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
923b198a | 4519 | return NULL; |
e00e8198 AM |
4520 | |
4521 | cache = elf_tdata (abfd)->elf_find_function_cache; | |
4522 | if (cache == NULL) | |
4523 | { | |
4524 | cache = bfd_zalloc (abfd, sizeof (*cache)); | |
4525 | elf_tdata (abfd)->elf_find_function_cache = cache; | |
4526 | if (cache == NULL) | |
923b198a | 4527 | return NULL; |
e00e8198 AM |
4528 | } |
4529 | if (cache->last_section != section | |
4530 | || cache->func == NULL | |
4531 | || offset < cache->func->value | |
4532 | || offset >= cache->func->value + cache->func_size) | |
4533 | { | |
4534 | asymbol *file; | |
4535 | bfd_vma low_func; | |
4536 | asymbol **p; | |
4537 | /* ??? Given multiple file symbols, it is impossible to reliably | |
4538 | choose the right file name for global symbols. File symbols are | |
4539 | local symbols, and thus all file symbols must sort before any | |
4540 | global symbols. The ELF spec may be interpreted to say that a | |
4541 | file symbol must sort before other local symbols, but currently | |
4542 | ld -r doesn't do this. So, for ld -r output, it is possible to | |
4543 | make a better choice of file name for local symbols by ignoring | |
4544 | file symbols appearing after a given local symbol. */ | |
4545 | enum { nothing_seen, symbol_seen, file_after_symbol_seen } state; | |
4546 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
4547 | ||
4548 | file = NULL; | |
4549 | low_func = 0; | |
4550 | state = nothing_seen; | |
4551 | cache->filename = NULL; | |
4552 | cache->func = NULL; | |
4553 | cache->func_size = 0; | |
4554 | cache->last_section = section; | |
4555 | ||
4556 | for (p = symbols; *p != NULL; p++) | |
4557 | { | |
4558 | asymbol *sym = *p; | |
4559 | bfd_vma code_off; | |
4560 | bfd_size_type size; | |
4561 | ||
4562 | if ((sym->flags & BSF_FILE) != 0) | |
4563 | { | |
4564 | file = sym; | |
4565 | if (state == symbol_seen) | |
4566 | state = file_after_symbol_seen; | |
4567 | continue; | |
4568 | } | |
4569 | ||
4570 | size = bed->maybe_function_sym (sym, section, &code_off); | |
4571 | if (size != 0 | |
4572 | && code_off <= offset | |
4573 | && (code_off > low_func | |
4574 | || (code_off == low_func | |
4575 | && size > cache->func_size))) | |
4576 | { | |
4577 | cache->func = sym; | |
4578 | cache->func_size = size; | |
4579 | cache->filename = NULL; | |
4580 | low_func = code_off; | |
4581 | if (file != NULL | |
4582 | && ((sym->flags & BSF_LOCAL) != 0 | |
4583 | || state != file_after_symbol_seen)) | |
4584 | cache->filename = bfd_asymbol_name (file); | |
4585 | } | |
4586 | if (state == nothing_seen) | |
4587 | state = symbol_seen; | |
4588 | } | |
4589 | } | |
4590 | ||
4591 | if (cache->func == NULL) | |
923b198a | 4592 | return NULL; |
e00e8198 AM |
4593 | |
4594 | if (filename_ptr) | |
4595 | *filename_ptr = cache->filename; | |
4596 | if (functionname_ptr) | |
4597 | *functionname_ptr = bfd_asymbol_name (cache->func); | |
4598 | ||
923b198a | 4599 | return cache->func; |
e00e8198 | 4600 | } |