2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
5 Adapted from gdb/dwarf2read.c by Gavin Koch of Cygnus Solutions
8 From the dwarf2read.c header:
9 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
10 Inc. with support from Florida State University (under contract
11 with the Ada Joint Program Office), and Silicon Graphics, Inc.
12 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
13 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 support in dwarfread.c
16 This file is part of BFD.
18 This program is free software; you can redistribute it and/or modify
19 it under the terms of the GNU General Public License as published by
20 the Free Software Foundation; either version 3 of the License, or (at
21 your option) any later version.
23 This program is distributed in the hope that it will be useful, but
24 WITHOUT ANY WARRANTY; without even the implied warranty of
25 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26 General Public License for more details.
28 You should have received a copy of the GNU General Public License
29 along with this program; if not, write to the Free Software
30 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
31 MA 02110-1301, USA. */
35 #include "libiberty.h"
40 /* The data in the .debug_line statement prologue looks like this. */
45 unsigned short version;
46 bfd_vma prologue_length;
47 unsigned char minimum_instruction_length;
48 unsigned char maximum_ops_per_insn;
49 unsigned char default_is_stmt;
51 unsigned char line_range;
52 unsigned char opcode_base;
53 unsigned char *standard_opcode_lengths;
56 /* Attributes have a name and a value. */
60 enum dwarf_attribute name;
65 struct dwarf_block *blk;
72 /* Blocks are a bunch of untyped bytes. */
79 struct adjusted_section
87 /* A list of all previously read comp_units. */
88 struct comp_unit *all_comp_units;
90 /* Last comp unit in list above. */
91 struct comp_unit *last_comp_unit;
93 /* Names of the debug sections. */
94 const struct dwarf_debug_section *debug_sections;
96 /* The next unread compilation unit within the .debug_info section.
97 Zero indicates that the .debug_info section has not been loaded
101 /* Pointer to the end of the .debug_info section memory buffer. */
102 bfd_byte *info_ptr_end;
104 /* Pointer to the bfd, section and address of the beginning of the
105 section. The bfd might be different than expected because of
106 gnu_debuglink sections. */
109 bfd_byte *sec_info_ptr;
111 /* A pointer to the memory block allocated for info_ptr. Neither
112 info_ptr nor sec_info_ptr are guaranteed to stay pointing to the
113 beginning of the malloc block. This is used only to free the
115 bfd_byte *info_ptr_memory;
117 /* Pointer to the symbol table. */
120 /* Pointer to the .debug_abbrev section loaded into memory. */
121 bfd_byte *dwarf_abbrev_buffer;
123 /* Length of the loaded .debug_abbrev section. */
124 bfd_size_type dwarf_abbrev_size;
126 /* Buffer for decode_line_info. */
127 bfd_byte *dwarf_line_buffer;
129 /* Length of the loaded .debug_line section. */
130 bfd_size_type dwarf_line_size;
132 /* Pointer to the .debug_str section loaded into memory. */
133 bfd_byte *dwarf_str_buffer;
135 /* Length of the loaded .debug_str section. */
136 bfd_size_type dwarf_str_size;
138 /* Pointer to the .debug_ranges section loaded into memory. */
139 bfd_byte *dwarf_ranges_buffer;
141 /* Length of the loaded .debug_ranges section. */
142 bfd_size_type dwarf_ranges_size;
144 /* If the most recent call to bfd_find_nearest_line was given an
145 address in an inlined function, preserve a pointer into the
146 calling chain for subsequent calls to bfd_find_inliner_info to
148 struct funcinfo *inliner_chain;
150 /* Number of sections whose VMA we must adjust. */
151 unsigned int adjusted_section_count;
153 /* Array of sections with adjusted VMA. */
154 struct adjusted_section *adjusted_sections;
156 /* Number of times find_line is called. This is used in
157 the heuristic for enabling the info hash tables. */
160 #define STASH_INFO_HASH_TRIGGER 100
162 /* Hash table mapping symbol names to function infos. */
163 struct info_hash_table *funcinfo_hash_table;
165 /* Hash table mapping symbol names to variable infos. */
166 struct info_hash_table *varinfo_hash_table;
168 /* Head of comp_unit list in the last hash table update. */
169 struct comp_unit *hash_units_head;
171 /* Status of info hash. */
172 int info_hash_status;
173 #define STASH_INFO_HASH_OFF 0
174 #define STASH_INFO_HASH_ON 1
175 #define STASH_INFO_HASH_DISABLED 2
177 /* True if we opened bfd_ptr. */
178 bfd_boolean close_on_cleanup;
188 /* A minimal decoding of DWARF2 compilation units. We only decode
189 what's needed to get to the line number information. */
193 /* Chain the previously read compilation units. */
194 struct comp_unit *next_unit;
196 /* Likewise, chain the compilation unit read after this one.
197 The comp units are stored in reversed reading order. */
198 struct comp_unit *prev_unit;
200 /* Keep the bfd convenient (for memory allocation). */
203 /* The lowest and highest addresses contained in this compilation
204 unit as specified in the compilation unit header. */
205 struct arange arange;
207 /* The DW_AT_name attribute (for error messages). */
210 /* The abbrev hash table. */
211 struct abbrev_info **abbrevs;
213 /* Note that an error was found by comp_unit_find_nearest_line. */
216 /* The DW_AT_comp_dir attribute. */
219 /* TRUE if there is a line number table associated with this comp. unit. */
222 /* Pointer to the current comp_unit so that we can find a given entry
224 bfd_byte *info_ptr_unit;
226 /* Pointer to the start of the debug section, for DW_FORM_ref_addr. */
227 bfd_byte *sec_info_ptr;
229 /* The offset into .debug_line of the line number table. */
230 unsigned long line_offset;
232 /* Pointer to the first child die for the comp unit. */
233 bfd_byte *first_child_die_ptr;
235 /* The end of the comp unit. */
238 /* The decoded line number, NULL if not yet decoded. */
239 struct line_info_table *line_table;
241 /* A list of the functions found in this comp. unit. */
242 struct funcinfo *function_table;
244 /* A list of the variables found in this comp. unit. */
245 struct varinfo *variable_table;
247 /* Pointer to dwarf2_debug structure. */
248 struct dwarf2_debug *stash;
250 /* DWARF format version for this unit - from unit header. */
253 /* Address size for this unit - from unit header. */
254 unsigned char addr_size;
256 /* Offset size for this unit - from unit header. */
257 unsigned char offset_size;
259 /* Base address for this unit - from DW_AT_low_pc attribute of
260 DW_TAG_compile_unit DIE */
261 bfd_vma base_address;
263 /* TRUE if symbols are cached in hash table for faster lookup by name. */
267 /* This data structure holds the information of an abbrev. */
270 unsigned int number; /* Number identifying abbrev. */
271 enum dwarf_tag tag; /* DWARF tag. */
272 int has_children; /* Boolean. */
273 unsigned int num_attrs; /* Number of attributes. */
274 struct attr_abbrev *attrs; /* An array of attribute descriptions. */
275 struct abbrev_info *next; /* Next in chain. */
280 enum dwarf_attribute name;
281 enum dwarf_form form;
284 /* Map of uncompressed DWARF debug section name to compressed one. It
285 is terminated by NULL uncompressed_name. */
287 const struct dwarf_debug_section dwarf_debug_sections[] =
289 { ".debug_abbrev", ".zdebug_abbrev" },
290 { ".debug_aranges", ".zdebug_aranges" },
291 { ".debug_frame", ".zdebug_frame" },
292 { ".debug_info", ".zdebug_info" },
293 { ".debug_line", ".zdebug_line" },
294 { ".debug_loc", ".zdebug_loc" },
295 { ".debug_macinfo", ".zdebug_macinfo" },
296 { ".debug_macro", ".zdebug_macro" },
297 { ".debug_pubnames", ".zdebug_pubnames" },
298 { ".debug_pubtypes", ".zdebug_pubtypes" },
299 { ".debug_ranges", ".zdebug_ranges" },
300 { ".debug_static_func", ".zdebug_static_func" },
301 { ".debug_static_vars", ".zdebug_static_vars" },
302 { ".debug_str", ".zdebug_str", },
303 { ".debug_types", ".zdebug_types" },
304 /* GNU DWARF 1 extensions */
305 { ".debug_sfnames", ".zdebug_sfnames" },
306 { ".debug_srcinfo", ".zebug_srcinfo" },
307 /* SGI/MIPS DWARF 2 extensions */
308 { ".debug_funcnames", ".zdebug_funcnames" },
309 { ".debug_typenames", ".zdebug_typenames" },
310 { ".debug_varnames", ".zdebug_varnames" },
311 { ".debug_weaknames", ".zdebug_weaknames" },
315 enum dwarf_debug_section_enum
340 #ifndef ABBREV_HASH_SIZE
341 #define ABBREV_HASH_SIZE 121
343 #ifndef ATTR_ALLOC_CHUNK
344 #define ATTR_ALLOC_CHUNK 4
347 /* Variable and function hash tables. This is used to speed up look-up
348 in lookup_symbol_in_var_table() and lookup_symbol_in_function_table().
349 In order to share code between variable and function infos, we use
350 a list of untyped pointer for all variable/function info associated with
351 a symbol. We waste a bit of memory for list with one node but that
352 simplifies the code. */
354 struct info_list_node
356 struct info_list_node *next;
360 /* Info hash entry. */
361 struct info_hash_entry
363 struct bfd_hash_entry root;
364 struct info_list_node *head;
367 struct info_hash_table
369 struct bfd_hash_table base;
372 /* Function to create a new entry in info hash table. */
374 static struct bfd_hash_entry *
375 info_hash_table_newfunc (struct bfd_hash_entry *entry,
376 struct bfd_hash_table *table,
379 struct info_hash_entry *ret = (struct info_hash_entry *) entry;
381 /* Allocate the structure if it has not already been allocated by a
385 ret = (struct info_hash_entry *) bfd_hash_allocate (table,
391 /* Call the allocation method of the base class. */
392 ret = ((struct info_hash_entry *)
393 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
395 /* Initialize the local fields here. */
399 return (struct bfd_hash_entry *) ret;
402 /* Function to create a new info hash table. It returns a pointer to the
403 newly created table or NULL if there is any error. We need abfd
404 solely for memory allocation. */
406 static struct info_hash_table *
407 create_info_hash_table (bfd *abfd)
409 struct info_hash_table *hash_table;
411 hash_table = ((struct info_hash_table *)
412 bfd_alloc (abfd, sizeof (struct info_hash_table)));
416 if (!bfd_hash_table_init (&hash_table->base, info_hash_table_newfunc,
417 sizeof (struct info_hash_entry)))
419 bfd_release (abfd, hash_table);
426 /* Insert an info entry into an info hash table. We do not check of
427 duplicate entries. Also, the caller need to guarantee that the
428 right type of info in inserted as info is passed as a void* pointer.
429 This function returns true if there is no error. */
432 insert_info_hash_table (struct info_hash_table *hash_table,
437 struct info_hash_entry *entry;
438 struct info_list_node *node;
440 entry = (struct info_hash_entry*) bfd_hash_lookup (&hash_table->base,
445 node = (struct info_list_node *) bfd_hash_allocate (&hash_table->base,
451 node->next = entry->head;
457 /* Look up an info entry list from an info hash table. Return NULL
460 static struct info_list_node *
461 lookup_info_hash_table (struct info_hash_table *hash_table, const char *key)
463 struct info_hash_entry *entry;
465 entry = (struct info_hash_entry*) bfd_hash_lookup (&hash_table->base, key,
467 return entry ? entry->head : NULL;
470 /* Read a section into its appropriate place in the dwarf2_debug
471 struct (indicated by SECTION_BUFFER and SECTION_SIZE). If SYMS is
472 not NULL, use bfd_simple_get_relocated_section_contents to read the
473 section contents, otherwise use bfd_get_section_contents. Fail if
474 the located section does not contain at least OFFSET bytes. */
477 read_section (bfd * abfd,
478 const struct dwarf_debug_section *sec,
481 bfd_byte ** section_buffer,
482 bfd_size_type * section_size)
485 const char *section_name = sec->uncompressed_name;
487 /* read_section is a noop if the section has already been read. */
488 if (!*section_buffer)
490 msec = bfd_get_section_by_name (abfd, section_name);
493 section_name = sec->compressed_name;
494 if (section_name != NULL)
495 msec = bfd_get_section_by_name (abfd, section_name);
499 (*_bfd_error_handler) (_("Dwarf Error: Can't find %s section."),
500 sec->uncompressed_name);
501 bfd_set_error (bfd_error_bad_value);
505 *section_size = msec->rawsize ? msec->rawsize : msec->size;
509 = bfd_simple_get_relocated_section_contents (abfd, msec, NULL, syms);
510 if (! *section_buffer)
515 *section_buffer = (bfd_byte *) bfd_malloc (*section_size);
516 if (! *section_buffer)
518 if (! bfd_get_section_contents (abfd, msec, *section_buffer,
524 /* It is possible to get a bad value for the offset into the section
525 that the client wants. Validate it here to avoid trouble later. */
526 if (offset != 0 && offset >= *section_size)
528 (*_bfd_error_handler) (_("Dwarf Error: Offset (%lu)"
529 " greater than or equal to %s size (%lu)."),
530 (long) offset, section_name, *section_size);
531 bfd_set_error (bfd_error_bad_value);
539 The following function up to the END VERBATIM mark are
540 copied directly from dwarf2read.c. */
542 /* Read dwarf information from a buffer. */
545 read_1_byte (bfd *abfd ATTRIBUTE_UNUSED, bfd_byte *buf)
547 return bfd_get_8 (abfd, buf);
551 read_1_signed_byte (bfd *abfd ATTRIBUTE_UNUSED, bfd_byte *buf)
553 return bfd_get_signed_8 (abfd, buf);
557 read_2_bytes (bfd *abfd, bfd_byte *buf)
559 return bfd_get_16 (abfd, buf);
563 read_4_bytes (bfd *abfd, bfd_byte *buf)
565 return bfd_get_32 (abfd, buf);
569 read_8_bytes (bfd *abfd, bfd_byte *buf)
571 return bfd_get_64 (abfd, buf);
575 read_n_bytes (bfd *abfd ATTRIBUTE_UNUSED,
577 unsigned int size ATTRIBUTE_UNUSED)
583 read_string (bfd *abfd ATTRIBUTE_UNUSED,
585 unsigned int *bytes_read_ptr)
587 /* Return a pointer to the embedded string. */
588 char *str = (char *) buf;
596 *bytes_read_ptr = strlen (str) + 1;
603 read_indirect_string (struct comp_unit * unit,
605 unsigned int * bytes_read_ptr)
608 struct dwarf2_debug *stash = unit->stash;
611 if (unit->offset_size == 4)
612 offset = read_4_bytes (unit->abfd, buf);
614 offset = read_8_bytes (unit->abfd, buf);
616 *bytes_read_ptr = unit->offset_size;
618 if (! read_section (unit->abfd, &stash->debug_sections[debug_str],
620 &stash->dwarf_str_buffer, &stash->dwarf_str_size))
623 str = (char *) stash->dwarf_str_buffer + offset;
630 read_address (struct comp_unit *unit, bfd_byte *buf)
632 int signed_vma = get_elf_backend_data (unit->abfd)->sign_extend_vma;
636 switch (unit->addr_size)
639 return bfd_get_signed_64 (unit->abfd, buf);
641 return bfd_get_signed_32 (unit->abfd, buf);
643 return bfd_get_signed_16 (unit->abfd, buf);
650 switch (unit->addr_size)
653 return bfd_get_64 (unit->abfd, buf);
655 return bfd_get_32 (unit->abfd, buf);
657 return bfd_get_16 (unit->abfd, buf);
664 /* Lookup an abbrev_info structure in the abbrev hash table. */
666 static struct abbrev_info *
667 lookup_abbrev (unsigned int number, struct abbrev_info **abbrevs)
669 unsigned int hash_number;
670 struct abbrev_info *abbrev;
672 hash_number = number % ABBREV_HASH_SIZE;
673 abbrev = abbrevs[hash_number];
677 if (abbrev->number == number)
680 abbrev = abbrev->next;
686 /* In DWARF version 2, the description of the debugging information is
687 stored in a separate .debug_abbrev section. Before we read any
688 dies from a section we read in all abbreviations and install them
691 static struct abbrev_info**
692 read_abbrevs (bfd *abfd, bfd_uint64_t offset, struct dwarf2_debug *stash)
694 struct abbrev_info **abbrevs;
695 bfd_byte *abbrev_ptr;
696 struct abbrev_info *cur_abbrev;
697 unsigned int abbrev_number, bytes_read, abbrev_name;
698 unsigned int abbrev_form, hash_number;
701 if (! read_section (abfd, &stash->debug_sections[debug_abbrev],
703 &stash->dwarf_abbrev_buffer, &stash->dwarf_abbrev_size))
706 amt = sizeof (struct abbrev_info*) * ABBREV_HASH_SIZE;
707 abbrevs = (struct abbrev_info **) bfd_zalloc (abfd, amt);
711 abbrev_ptr = stash->dwarf_abbrev_buffer + offset;
712 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
713 abbrev_ptr += bytes_read;
715 /* Loop until we reach an abbrev number of 0. */
716 while (abbrev_number)
718 amt = sizeof (struct abbrev_info);
719 cur_abbrev = (struct abbrev_info *) bfd_zalloc (abfd, amt);
720 if (cur_abbrev == NULL)
723 /* Read in abbrev header. */
724 cur_abbrev->number = abbrev_number;
725 cur_abbrev->tag = (enum dwarf_tag)
726 read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
727 abbrev_ptr += bytes_read;
728 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
731 /* Now read in declarations. */
732 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
733 abbrev_ptr += bytes_read;
734 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
735 abbrev_ptr += bytes_read;
739 if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0)
741 struct attr_abbrev *tmp;
743 amt = cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK;
744 amt *= sizeof (struct attr_abbrev);
745 tmp = (struct attr_abbrev *) bfd_realloc (cur_abbrev->attrs, amt);
750 for (i = 0; i < ABBREV_HASH_SIZE; i++)
752 struct abbrev_info *abbrev = abbrevs[i];
756 free (abbrev->attrs);
757 abbrev = abbrev->next;
762 cur_abbrev->attrs = tmp;
765 cur_abbrev->attrs[cur_abbrev->num_attrs].name
766 = (enum dwarf_attribute) abbrev_name;
767 cur_abbrev->attrs[cur_abbrev->num_attrs++].form
768 = (enum dwarf_form) abbrev_form;
769 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
770 abbrev_ptr += bytes_read;
771 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
772 abbrev_ptr += bytes_read;
775 hash_number = abbrev_number % ABBREV_HASH_SIZE;
776 cur_abbrev->next = abbrevs[hash_number];
777 abbrevs[hash_number] = cur_abbrev;
779 /* Get next abbreviation.
780 Under Irix6 the abbreviations for a compilation unit are not
781 always properly terminated with an abbrev number of 0.
782 Exit loop if we encounter an abbreviation which we have
783 already read (which means we are about to read the abbreviations
784 for the next compile unit) or if the end of the abbreviation
786 if ((unsigned int) (abbrev_ptr - stash->dwarf_abbrev_buffer)
787 >= stash->dwarf_abbrev_size)
789 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
790 abbrev_ptr += bytes_read;
791 if (lookup_abbrev (abbrev_number,abbrevs) != NULL)
798 /* Read an attribute value described by an attribute form. */
801 read_attribute_value (struct attribute *attr,
803 struct comp_unit *unit,
806 bfd *abfd = unit->abfd;
807 unsigned int bytes_read;
808 struct dwarf_block *blk;
811 attr->form = (enum dwarf_form) form;
815 case DW_FORM_ref_addr:
816 /* DW_FORM_ref_addr is an address in DWARF2, and an offset in
818 if (unit->version == 3 || unit->version == 4)
820 if (unit->offset_size == 4)
821 attr->u.val = read_4_bytes (unit->abfd, info_ptr);
823 attr->u.val = read_8_bytes (unit->abfd, info_ptr);
824 info_ptr += unit->offset_size;
829 attr->u.val = read_address (unit, info_ptr);
830 info_ptr += unit->addr_size;
832 case DW_FORM_sec_offset:
833 if (unit->offset_size == 4)
834 attr->u.val = read_4_bytes (unit->abfd, info_ptr);
836 attr->u.val = read_8_bytes (unit->abfd, info_ptr);
837 info_ptr += unit->offset_size;
840 amt = sizeof (struct dwarf_block);
841 blk = (struct dwarf_block *) bfd_alloc (abfd, amt);
844 blk->size = read_2_bytes (abfd, info_ptr);
846 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
847 info_ptr += blk->size;
851 amt = sizeof (struct dwarf_block);
852 blk = (struct dwarf_block *) bfd_alloc (abfd, amt);
855 blk->size = read_4_bytes (abfd, info_ptr);
857 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
858 info_ptr += blk->size;
862 attr->u.val = read_2_bytes (abfd, info_ptr);
866 attr->u.val = read_4_bytes (abfd, info_ptr);
870 attr->u.val = read_8_bytes (abfd, info_ptr);
874 attr->u.str = read_string (abfd, info_ptr, &bytes_read);
875 info_ptr += bytes_read;
878 attr->u.str = read_indirect_string (unit, info_ptr, &bytes_read);
879 info_ptr += bytes_read;
881 case DW_FORM_exprloc:
883 amt = sizeof (struct dwarf_block);
884 blk = (struct dwarf_block *) bfd_alloc (abfd, amt);
887 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
888 info_ptr += bytes_read;
889 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
890 info_ptr += blk->size;
894 amt = sizeof (struct dwarf_block);
895 blk = (struct dwarf_block *) bfd_alloc (abfd, amt);
898 blk->size = read_1_byte (abfd, info_ptr);
900 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
901 info_ptr += blk->size;
905 attr->u.val = read_1_byte (abfd, info_ptr);
909 attr->u.val = read_1_byte (abfd, info_ptr);
912 case DW_FORM_flag_present:
916 attr->u.sval = read_signed_leb128 (abfd, info_ptr, &bytes_read);
917 info_ptr += bytes_read;
920 attr->u.val = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
921 info_ptr += bytes_read;
924 attr->u.val = read_1_byte (abfd, info_ptr);
928 attr->u.val = read_2_bytes (abfd, info_ptr);
932 attr->u.val = read_4_bytes (abfd, info_ptr);
936 attr->u.val = read_8_bytes (abfd, info_ptr);
939 case DW_FORM_ref_sig8:
940 attr->u.val = read_8_bytes (abfd, info_ptr);
943 case DW_FORM_ref_udata:
944 attr->u.val = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
945 info_ptr += bytes_read;
947 case DW_FORM_indirect:
948 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
949 info_ptr += bytes_read;
950 info_ptr = read_attribute_value (attr, form, unit, info_ptr);
953 (*_bfd_error_handler) (_("Dwarf Error: Invalid or unhandled FORM value: %u."),
955 bfd_set_error (bfd_error_bad_value);
961 /* Read an attribute described by an abbreviated attribute. */
964 read_attribute (struct attribute *attr,
965 struct attr_abbrev *abbrev,
966 struct comp_unit *unit,
969 attr->name = abbrev->name;
970 info_ptr = read_attribute_value (attr, abbrev->form, unit, info_ptr);
974 /* Source line information table routines. */
976 #define FILE_ALLOC_CHUNK 5
977 #define DIR_ALLOC_CHUNK 5
981 struct line_info* prev_line;
986 unsigned int discriminator;
987 unsigned char op_index;
988 unsigned char end_sequence; /* End of (sequential) code sequence. */
1002 struct line_sequence* prev_sequence;
1003 struct line_info* last_line; /* Largest VMA. */
1006 struct line_info_table
1009 unsigned int num_files;
1010 unsigned int num_dirs;
1011 unsigned int num_sequences;
1014 struct fileinfo* files;
1015 struct line_sequence* sequences;
1016 struct line_info* lcl_head; /* Local head; used in 'add_line_info'. */
1019 /* Remember some information about each function. If the function is
1020 inlined (DW_TAG_inlined_subroutine) it may have two additional
1021 attributes, DW_AT_call_file and DW_AT_call_line, which specify the
1022 source code location where this function was inlined. */
1026 /* Pointer to previous function in list of all functions. */
1027 struct funcinfo *prev_func;
1028 /* Pointer to function one scope higher. */
1029 struct funcinfo *caller_func;
1030 /* Source location file name where caller_func inlines this func. */
1032 /* Source location line number where caller_func inlines this func. */
1034 /* Source location file name. */
1036 /* Source location line number. */
1040 struct arange arange;
1041 /* Where the symbol is defined. */
1047 /* Pointer to previous variable in list of all variables */
1048 struct varinfo *prev_var;
1049 /* Source location file name */
1051 /* Source location line number */
1056 /* Where the symbol is defined */
1058 /* Is this a stack variable? */
1059 unsigned int stack: 1;
1062 /* Return TRUE if NEW_LINE should sort after LINE. */
1064 static inline bfd_boolean
1065 new_line_sorts_after (struct line_info *new_line, struct line_info *line)
1067 return (new_line->address > line->address
1068 || (new_line->address == line->address
1069 && (new_line->op_index > line->op_index
1070 || (new_line->op_index == line->op_index
1071 && new_line->end_sequence < line->end_sequence))));
1075 /* Adds a new entry to the line_info list in the line_info_table, ensuring
1076 that the list is sorted. Note that the line_info list is sorted from
1077 highest to lowest VMA (with possible duplicates); that is,
1078 line_info->prev_line always accesses an equal or smaller VMA. */
1081 add_line_info (struct line_info_table *table,
1083 unsigned char op_index,
1086 unsigned int column,
1087 unsigned int discriminator,
1090 bfd_size_type amt = sizeof (struct line_info);
1091 struct line_sequence* seq = table->sequences;
1092 struct line_info* info = (struct line_info *) bfd_alloc (table->abfd, amt);
1097 /* Set member data of 'info'. */
1098 info->prev_line = NULL;
1099 info->address = address;
1100 info->op_index = op_index;
1102 info->column = column;
1103 info->discriminator = discriminator;
1104 info->end_sequence = end_sequence;
1106 if (filename && filename[0])
1108 info->filename = (char *) bfd_alloc (table->abfd, strlen (filename) + 1);
1109 if (info->filename == NULL)
1111 strcpy (info->filename, filename);
1114 info->filename = NULL;
1116 /* Find the correct location for 'info'. Normally we will receive
1117 new line_info data 1) in order and 2) with increasing VMAs.
1118 However some compilers break the rules (cf. decode_line_info) and
1119 so we include some heuristics for quickly finding the correct
1120 location for 'info'. In particular, these heuristics optimize for
1121 the common case in which the VMA sequence that we receive is a
1122 list of locally sorted VMAs such as
1123 p...z a...j (where a < j < p < z)
1125 Note: table->lcl_head is used to head an *actual* or *possible*
1126 sub-sequence within the list (such as a...j) that is not directly
1127 headed by table->last_line
1129 Note: we may receive duplicate entries from 'decode_line_info'. */
1132 && seq->last_line->address == address
1133 && seq->last_line->op_index == op_index
1134 && seq->last_line->end_sequence == end_sequence)
1136 /* We only keep the last entry with the same address and end
1137 sequence. See PR ld/4986. */
1138 if (table->lcl_head == seq->last_line)
1139 table->lcl_head = info;
1140 info->prev_line = seq->last_line->prev_line;
1141 seq->last_line = info;
1143 else if (!seq || seq->last_line->end_sequence)
1145 /* Start a new line sequence. */
1146 amt = sizeof (struct line_sequence);
1147 seq = (struct line_sequence *) bfd_malloc (amt);
1150 seq->low_pc = address;
1151 seq->prev_sequence = table->sequences;
1152 seq->last_line = info;
1153 table->lcl_head = info;
1154 table->sequences = seq;
1155 table->num_sequences++;
1157 else if (new_line_sorts_after (info, seq->last_line))
1159 /* Normal case: add 'info' to the beginning of the current sequence. */
1160 info->prev_line = seq->last_line;
1161 seq->last_line = info;
1163 /* lcl_head: initialize to head a *possible* sequence at the end. */
1164 if (!table->lcl_head)
1165 table->lcl_head = info;
1167 else if (!new_line_sorts_after (info, table->lcl_head)
1168 && (!table->lcl_head->prev_line
1169 || new_line_sorts_after (info, table->lcl_head->prev_line)))
1171 /* Abnormal but easy: lcl_head is the head of 'info'. */
1172 info->prev_line = table->lcl_head->prev_line;
1173 table->lcl_head->prev_line = info;
1177 /* Abnormal and hard: Neither 'last_line' nor 'lcl_head'
1178 are valid heads for 'info'. Reset 'lcl_head'. */
1179 struct line_info* li2 = seq->last_line; /* Always non-NULL. */
1180 struct line_info* li1 = li2->prev_line;
1184 if (!new_line_sorts_after (info, li2)
1185 && new_line_sorts_after (info, li1))
1188 li2 = li1; /* always non-NULL */
1189 li1 = li1->prev_line;
1191 table->lcl_head = li2;
1192 info->prev_line = table->lcl_head->prev_line;
1193 table->lcl_head->prev_line = info;
1194 if (address < seq->low_pc)
1195 seq->low_pc = address;
1200 /* Extract a fully qualified filename from a line info table.
1201 The returned string has been malloc'ed and it is the caller's
1202 responsibility to free it. */
1205 concat_filename (struct line_info_table *table, unsigned int file)
1209 if (file - 1 >= table->num_files)
1211 /* FILE == 0 means unknown. */
1213 (*_bfd_error_handler)
1214 (_("Dwarf Error: mangled line number section (bad file number)."));
1215 return strdup ("<unknown>");
1218 filename = table->files[file - 1].name;
1220 if (!IS_ABSOLUTE_PATH (filename))
1222 char *dir_name = NULL;
1223 char *subdir_name = NULL;
1227 if (table->files[file - 1].dir)
1228 subdir_name = table->dirs[table->files[file - 1].dir - 1];
1230 if (!subdir_name || !IS_ABSOLUTE_PATH (subdir_name))
1231 dir_name = table->comp_dir;
1235 dir_name = subdir_name;
1240 return strdup (filename);
1242 len = strlen (dir_name) + strlen (filename) + 2;
1246 len += strlen (subdir_name) + 1;
1247 name = (char *) bfd_malloc (len);
1249 sprintf (name, "%s/%s/%s", dir_name, subdir_name, filename);
1253 name = (char *) bfd_malloc (len);
1255 sprintf (name, "%s/%s", dir_name, filename);
1261 return strdup (filename);
1265 arange_add (const struct comp_unit *unit, struct arange *first_arange,
1266 bfd_vma low_pc, bfd_vma high_pc)
1268 struct arange *arange;
1270 /* Ignore empty ranges. */
1271 if (low_pc == high_pc)
1274 /* If the first arange is empty, use it. */
1275 if (first_arange->high == 0)
1277 first_arange->low = low_pc;
1278 first_arange->high = high_pc;
1282 /* Next see if we can cheaply extend an existing range. */
1283 arange = first_arange;
1286 if (low_pc == arange->high)
1288 arange->high = high_pc;
1291 if (high_pc == arange->low)
1293 arange->low = low_pc;
1296 arange = arange->next;
1300 /* Need to allocate a new arange and insert it into the arange list.
1301 Order isn't significant, so just insert after the first arange. */
1302 arange = (struct arange *) bfd_alloc (unit->abfd, sizeof (*arange));
1305 arange->low = low_pc;
1306 arange->high = high_pc;
1307 arange->next = first_arange->next;
1308 first_arange->next = arange;
1312 /* Compare function for line sequences. */
1315 compare_sequences (const void* a, const void* b)
1317 const struct line_sequence* seq1 = a;
1318 const struct line_sequence* seq2 = b;
1320 /* Sort by low_pc as the primary key. */
1321 if (seq1->low_pc < seq2->low_pc)
1323 if (seq1->low_pc > seq2->low_pc)
1326 /* If low_pc values are equal, sort in reverse order of
1327 high_pc, so that the largest region comes first. */
1328 if (seq1->last_line->address < seq2->last_line->address)
1330 if (seq1->last_line->address > seq2->last_line->address)
1333 if (seq1->last_line->op_index < seq2->last_line->op_index)
1335 if (seq1->last_line->op_index > seq2->last_line->op_index)
1341 /* Sort the line sequences for quick lookup. */
1344 sort_line_sequences (struct line_info_table* table)
1347 struct line_sequence* sequences;
1348 struct line_sequence* seq;
1350 unsigned int num_sequences = table->num_sequences;
1351 bfd_vma last_high_pc;
1353 if (num_sequences == 0)
1356 /* Allocate space for an array of sequences. */
1357 amt = sizeof (struct line_sequence) * num_sequences;
1358 sequences = (struct line_sequence *) bfd_alloc (table->abfd, amt);
1359 if (sequences == NULL)
1362 /* Copy the linked list into the array, freeing the original nodes. */
1363 seq = table->sequences;
1364 for (n = 0; n < num_sequences; n++)
1366 struct line_sequence* last_seq = seq;
1369 sequences[n].low_pc = seq->low_pc;
1370 sequences[n].prev_sequence = NULL;
1371 sequences[n].last_line = seq->last_line;
1372 seq = seq->prev_sequence;
1375 BFD_ASSERT (seq == NULL);
1377 qsort (sequences, n, sizeof (struct line_sequence), compare_sequences);
1379 /* Make the list binary-searchable by trimming overlapping entries
1380 and removing nested entries. */
1382 last_high_pc = sequences[0].last_line->address;
1383 for (n = 1; n < table->num_sequences; n++)
1385 if (sequences[n].low_pc < last_high_pc)
1387 if (sequences[n].last_line->address <= last_high_pc)
1388 /* Skip nested entries. */
1391 /* Trim overlapping entries. */
1392 sequences[n].low_pc = last_high_pc;
1394 last_high_pc = sequences[n].last_line->address;
1395 if (n > num_sequences)
1397 /* Close up the gap. */
1398 sequences[num_sequences].low_pc = sequences[n].low_pc;
1399 sequences[num_sequences].last_line = sequences[n].last_line;
1404 table->sequences = sequences;
1405 table->num_sequences = num_sequences;
1409 /* Decode the line number information for UNIT. */
1411 static struct line_info_table*
1412 decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash)
1414 bfd *abfd = unit->abfd;
1415 struct line_info_table* table;
1418 struct line_head lh;
1419 unsigned int i, bytes_read, offset_size;
1420 char *cur_file, *cur_dir;
1421 unsigned char op_code, extended_op, adj_opcode;
1422 unsigned int exop_len;
1425 if (! read_section (abfd, &stash->debug_sections[debug_line],
1426 stash->syms, unit->line_offset,
1427 &stash->dwarf_line_buffer, &stash->dwarf_line_size))
1430 amt = sizeof (struct line_info_table);
1431 table = (struct line_info_table *) bfd_alloc (abfd, amt);
1435 table->comp_dir = unit->comp_dir;
1437 table->num_files = 0;
1438 table->files = NULL;
1440 table->num_dirs = 0;
1443 table->num_sequences = 0;
1444 table->sequences = NULL;
1446 table->lcl_head = NULL;
1448 line_ptr = stash->dwarf_line_buffer + unit->line_offset;
1450 /* Read in the prologue. */
1451 lh.total_length = read_4_bytes (abfd, line_ptr);
1454 if (lh.total_length == 0xffffffff)
1456 lh.total_length = read_8_bytes (abfd, line_ptr);
1460 else if (lh.total_length == 0 && unit->addr_size == 8)
1462 /* Handle (non-standard) 64-bit DWARF2 formats. */
1463 lh.total_length = read_4_bytes (abfd, line_ptr);
1467 line_end = line_ptr + lh.total_length;
1468 lh.version = read_2_bytes (abfd, line_ptr);
1469 if (lh.version < 2 || lh.version > 4)
1471 (*_bfd_error_handler)
1472 (_("Dwarf Error: Unhandled .debug_line version %d."), lh.version);
1473 bfd_set_error (bfd_error_bad_value);
1477 if (offset_size == 4)
1478 lh.prologue_length = read_4_bytes (abfd, line_ptr);
1480 lh.prologue_length = read_8_bytes (abfd, line_ptr);
1481 line_ptr += offset_size;
1482 lh.minimum_instruction_length = read_1_byte (abfd, line_ptr);
1484 if (lh.version >= 4)
1486 lh.maximum_ops_per_insn = read_1_byte (abfd, line_ptr);
1490 lh.maximum_ops_per_insn = 1;
1491 if (lh.maximum_ops_per_insn == 0)
1493 (*_bfd_error_handler)
1494 (_("Dwarf Error: Invalid maximum operations per instruction."));
1495 bfd_set_error (bfd_error_bad_value);
1498 lh.default_is_stmt = read_1_byte (abfd, line_ptr);
1500 lh.line_base = read_1_signed_byte (abfd, line_ptr);
1502 lh.line_range = read_1_byte (abfd, line_ptr);
1504 lh.opcode_base = read_1_byte (abfd, line_ptr);
1506 amt = lh.opcode_base * sizeof (unsigned char);
1507 lh.standard_opcode_lengths = (unsigned char *) bfd_alloc (abfd, amt);
1509 lh.standard_opcode_lengths[0] = 1;
1511 for (i = 1; i < lh.opcode_base; ++i)
1513 lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
1517 /* Read directory table. */
1518 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
1520 line_ptr += bytes_read;
1522 if ((table->num_dirs % DIR_ALLOC_CHUNK) == 0)
1526 amt = table->num_dirs + DIR_ALLOC_CHUNK;
1527 amt *= sizeof (char *);
1529 tmp = (char **) bfd_realloc (table->dirs, amt);
1535 table->dirs[table->num_dirs++] = cur_dir;
1538 line_ptr += bytes_read;
1540 /* Read file name table. */
1541 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
1543 line_ptr += bytes_read;
1545 if ((table->num_files % FILE_ALLOC_CHUNK) == 0)
1547 struct fileinfo *tmp;
1549 amt = table->num_files + FILE_ALLOC_CHUNK;
1550 amt *= sizeof (struct fileinfo);
1552 tmp = (struct fileinfo *) bfd_realloc (table->files, amt);
1558 table->files[table->num_files].name = cur_file;
1559 table->files[table->num_files].dir =
1560 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
1561 line_ptr += bytes_read;
1562 table->files[table->num_files].time =
1563 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
1564 line_ptr += bytes_read;
1565 table->files[table->num_files].size =
1566 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
1567 line_ptr += bytes_read;
1571 line_ptr += bytes_read;
1573 /* Read the statement sequences until there's nothing left. */
1574 while (line_ptr < line_end)
1576 /* State machine registers. */
1577 bfd_vma address = 0;
1578 unsigned char op_index = 0;
1579 char * filename = table->num_files ? concat_filename (table, 1) : NULL;
1580 unsigned int line = 1;
1581 unsigned int column = 0;
1582 unsigned int discriminator = 0;
1583 int is_stmt = lh.default_is_stmt;
1584 int end_sequence = 0;
1585 /* eraxxon@alumni.rice.edu: Against the DWARF2 specs, some
1586 compilers generate address sequences that are wildly out of
1587 order using DW_LNE_set_address (e.g. Intel C++ 6.0 compiler
1588 for ia64-Linux). Thus, to determine the low and high
1589 address, we must compare on every DW_LNS_copy, etc. */
1590 bfd_vma low_pc = (bfd_vma) -1;
1591 bfd_vma high_pc = 0;
1593 /* Decode the table. */
1594 while (! end_sequence)
1596 op_code = read_1_byte (abfd, line_ptr);
1599 if (op_code >= lh.opcode_base)
1601 /* Special operand. */
1602 adj_opcode = op_code - lh.opcode_base;
1603 if (lh.maximum_ops_per_insn == 1)
1604 address += (adj_opcode / lh.line_range
1605 * lh.minimum_instruction_length);
1608 address += ((op_index + adj_opcode / lh.line_range)
1609 / lh.maximum_ops_per_insn
1610 * lh.minimum_instruction_length);
1611 op_index = ((op_index + adj_opcode / lh.line_range)
1612 % lh.maximum_ops_per_insn);
1614 line += lh.line_base + (adj_opcode % lh.line_range);
1615 /* Append row to matrix using current values. */
1616 if (!add_line_info (table, address, op_index, filename,
1617 line, column, discriminator, 0))
1620 if (address < low_pc)
1622 if (address > high_pc)
1625 else switch (op_code)
1627 case DW_LNS_extended_op:
1628 exop_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
1629 line_ptr += bytes_read;
1630 extended_op = read_1_byte (abfd, line_ptr);
1633 switch (extended_op)
1635 case DW_LNE_end_sequence:
1637 if (!add_line_info (table, address, op_index, filename, line,
1638 column, discriminator, end_sequence))
1641 if (address < low_pc)
1643 if (address > high_pc)
1645 if (!arange_add (unit, &unit->arange, low_pc, high_pc))
1648 case DW_LNE_set_address:
1649 address = read_address (unit, line_ptr);
1651 line_ptr += unit->addr_size;
1653 case DW_LNE_define_file:
1654 cur_file = read_string (abfd, line_ptr, &bytes_read);
1655 line_ptr += bytes_read;
1656 if ((table->num_files % FILE_ALLOC_CHUNK) == 0)
1658 struct fileinfo *tmp;
1660 amt = table->num_files + FILE_ALLOC_CHUNK;
1661 amt *= sizeof (struct fileinfo);
1662 tmp = (struct fileinfo *) bfd_realloc (table->files, amt);
1667 table->files[table->num_files].name = cur_file;
1668 table->files[table->num_files].dir =
1669 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
1670 line_ptr += bytes_read;
1671 table->files[table->num_files].time =
1672 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
1673 line_ptr += bytes_read;
1674 table->files[table->num_files].size =
1675 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
1676 line_ptr += bytes_read;
1679 case DW_LNE_set_discriminator:
1681 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
1682 line_ptr += bytes_read;
1684 case DW_LNE_HP_source_file_correlation:
1685 line_ptr += exop_len - 1;
1688 (*_bfd_error_handler)
1689 (_("Dwarf Error: mangled line number section."));
1690 bfd_set_error (bfd_error_bad_value);
1692 if (filename != NULL)
1698 if (!add_line_info (table, address, op_index,
1699 filename, line, column, discriminator, 0))
1702 if (address < low_pc)
1704 if (address > high_pc)
1707 case DW_LNS_advance_pc:
1708 if (lh.maximum_ops_per_insn == 1)
1709 address += (lh.minimum_instruction_length
1710 * read_unsigned_leb128 (abfd, line_ptr,
1714 bfd_vma adjust = read_unsigned_leb128 (abfd, line_ptr,
1716 address = ((op_index + adjust) / lh.maximum_ops_per_insn
1717 * lh.minimum_instruction_length);
1718 op_index = (op_index + adjust) % lh.maximum_ops_per_insn;
1720 line_ptr += bytes_read;
1722 case DW_LNS_advance_line:
1723 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
1724 line_ptr += bytes_read;
1726 case DW_LNS_set_file:
1730 /* The file and directory tables are 0
1731 based, the references are 1 based. */
1732 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
1733 line_ptr += bytes_read;
1736 filename = concat_filename (table, file);
1739 case DW_LNS_set_column:
1740 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
1741 line_ptr += bytes_read;
1743 case DW_LNS_negate_stmt:
1744 is_stmt = (!is_stmt);
1746 case DW_LNS_set_basic_block:
1748 case DW_LNS_const_add_pc:
1749 if (lh.maximum_ops_per_insn == 1)
1750 address += (lh.minimum_instruction_length
1751 * ((255 - lh.opcode_base) / lh.line_range));
1754 bfd_vma adjust = ((255 - lh.opcode_base) / lh.line_range);
1755 address += (lh.minimum_instruction_length
1756 * ((op_index + adjust)
1757 / lh.maximum_ops_per_insn));
1758 op_index = (op_index + adjust) % lh.maximum_ops_per_insn;
1761 case DW_LNS_fixed_advance_pc:
1762 address += read_2_bytes (abfd, line_ptr);
1767 /* Unknown standard opcode, ignore it. */
1768 for (i = 0; i < lh.standard_opcode_lengths[op_code]; i++)
1770 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
1771 line_ptr += bytes_read;
1781 if (sort_line_sequences (table))
1785 if (table->sequences != NULL)
1786 free (table->sequences);
1787 if (table->files != NULL)
1788 free (table->files);
1789 if (table->dirs != NULL)
1794 /* If ADDR is within TABLE set the output parameters and return TRUE,
1795 otherwise return FALSE. The output parameters, FILENAME_PTR and
1796 LINENUMBER_PTR, are pointers to the objects to be filled in. */
1799 lookup_address_in_line_info_table (struct line_info_table *table,
1801 const char **filename_ptr,
1802 unsigned int *linenumber_ptr,
1803 unsigned int *discriminator_ptr)
1805 struct line_sequence *seq = NULL;
1806 struct line_info *each_line;
1809 /* Binary search the array of sequences. */
1811 high = table->num_sequences;
1814 mid = (low + high) / 2;
1815 seq = &table->sequences[mid];
1816 if (addr < seq->low_pc)
1818 else if (addr >= seq->last_line->address)
1824 if (seq && addr >= seq->low_pc && addr < seq->last_line->address)
1826 /* Note: seq->last_line should be a descendingly sorted list. */
1827 for (each_line = seq->last_line;
1829 each_line = each_line->prev_line)
1830 if (addr >= each_line->address)
1834 && !(each_line->end_sequence || each_line == seq->last_line))
1836 *filename_ptr = each_line->filename;
1837 *linenumber_ptr = each_line->line;
1838 if (discriminator_ptr)
1839 *discriminator_ptr = each_line->discriminator;
1844 *filename_ptr = NULL;
1848 /* Read in the .debug_ranges section for future reference. */
1851 read_debug_ranges (struct comp_unit *unit)
1853 struct dwarf2_debug *stash = unit->stash;
1854 return read_section (unit->abfd, &stash->debug_sections[debug_ranges],
1856 &stash->dwarf_ranges_buffer, &stash->dwarf_ranges_size);
1859 /* Function table functions. */
1861 /* If ADDR is within TABLE, set FUNCTIONNAME_PTR, and return TRUE.
1862 Note that we need to find the function that has the smallest
1863 range that contains ADDR, to handle inlined functions without
1864 depending upon them being ordered in TABLE by increasing range. */
1867 lookup_address_in_function_table (struct comp_unit *unit,
1869 struct funcinfo **function_ptr,
1870 const char **functionname_ptr)
1872 struct funcinfo* each_func;
1873 struct funcinfo* best_fit = NULL;
1874 struct arange *arange;
1876 for (each_func = unit->function_table;
1878 each_func = each_func->prev_func)
1880 for (arange = &each_func->arange;
1882 arange = arange->next)
1884 if (addr >= arange->low && addr < arange->high)
1887 || (arange->high - arange->low
1888 < best_fit->arange.high - best_fit->arange.low))
1889 best_fit = each_func;
1896 *functionname_ptr = best_fit->name;
1897 *function_ptr = best_fit;
1906 /* If SYM at ADDR is within function table of UNIT, set FILENAME_PTR
1907 and LINENUMBER_PTR, and return TRUE. */
1910 lookup_symbol_in_function_table (struct comp_unit *unit,
1913 const char **filename_ptr,
1914 unsigned int *linenumber_ptr)
1916 struct funcinfo* each_func;
1917 struct funcinfo* best_fit = NULL;
1918 struct arange *arange;
1919 const char *name = bfd_asymbol_name (sym);
1920 asection *sec = bfd_get_section (sym);
1922 for (each_func = unit->function_table;
1924 each_func = each_func->prev_func)
1926 for (arange = &each_func->arange;
1928 arange = arange->next)
1930 if ((!each_func->sec || each_func->sec == sec)
1931 && addr >= arange->low
1932 && addr < arange->high
1934 && strcmp (name, each_func->name) == 0
1936 || (arange->high - arange->low
1937 < best_fit->arange.high - best_fit->arange.low)))
1938 best_fit = each_func;
1944 best_fit->sec = sec;
1945 *filename_ptr = best_fit->file;
1946 *linenumber_ptr = best_fit->line;
1953 /* Variable table functions. */
1955 /* If SYM is within variable table of UNIT, set FILENAME_PTR and
1956 LINENUMBER_PTR, and return TRUE. */
1959 lookup_symbol_in_variable_table (struct comp_unit *unit,
1962 const char **filename_ptr,
1963 unsigned int *linenumber_ptr)
1965 const char *name = bfd_asymbol_name (sym);
1966 asection *sec = bfd_get_section (sym);
1967 struct varinfo* each;
1969 for (each = unit->variable_table; each; each = each->prev_var)
1970 if (each->stack == 0
1971 && each->file != NULL
1972 && each->name != NULL
1973 && each->addr == addr
1974 && (!each->sec || each->sec == sec)
1975 && strcmp (name, each->name) == 0)
1981 *filename_ptr = each->file;
1982 *linenumber_ptr = each->line;
1990 find_abstract_instance_name (struct comp_unit *unit,
1991 struct attribute *attr_ptr)
1993 bfd *abfd = unit->abfd;
1995 unsigned int abbrev_number, bytes_read, i;
1996 struct abbrev_info *abbrev;
1997 bfd_uint64_t die_ref = attr_ptr->u.val;
1998 struct attribute attr;
2001 /* DW_FORM_ref_addr can reference an entry in a different CU. It
2002 is an offset from the .debug_info section, not the current CU. */
2003 if (attr_ptr->form == DW_FORM_ref_addr)
2005 /* We only support DW_FORM_ref_addr within the same file, so
2006 any relocations should be resolved already. */
2010 info_ptr = unit->sec_info_ptr + die_ref;
2013 info_ptr = unit->info_ptr_unit + die_ref;
2014 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2015 info_ptr += bytes_read;
2019 abbrev = lookup_abbrev (abbrev_number, unit->abbrevs);
2022 (*_bfd_error_handler)
2023 (_("Dwarf Error: Could not find abbrev number %u."), abbrev_number);
2024 bfd_set_error (bfd_error_bad_value);
2028 for (i = 0; i < abbrev->num_attrs; ++i)
2030 info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit,
2032 if (info_ptr == NULL)
2037 /* Prefer DW_AT_MIPS_linkage_name or DW_AT_linkage_name
2042 case DW_AT_specification:
2043 name = find_abstract_instance_name (unit, &attr);
2045 case DW_AT_linkage_name:
2046 case DW_AT_MIPS_linkage_name:
2059 read_rangelist (struct comp_unit *unit, struct arange *arange,
2060 bfd_uint64_t offset)
2062 bfd_byte *ranges_ptr;
2063 bfd_vma base_address = unit->base_address;
2065 if (! unit->stash->dwarf_ranges_buffer)
2067 if (! read_debug_ranges (unit))
2070 ranges_ptr = unit->stash->dwarf_ranges_buffer + offset;
2077 low_pc = read_address (unit, ranges_ptr);
2078 ranges_ptr += unit->addr_size;
2079 high_pc = read_address (unit, ranges_ptr);
2080 ranges_ptr += unit->addr_size;
2082 if (low_pc == 0 && high_pc == 0)
2084 if (low_pc == -1UL && high_pc != -1UL)
2085 base_address = high_pc;
2088 if (!arange_add (unit, arange,
2089 base_address + low_pc, base_address + high_pc))
2096 /* DWARF2 Compilation unit functions. */
2098 /* Scan over each die in a comp. unit looking for functions to add
2099 to the function table and variables to the variable table. */
2102 scan_unit_for_symbols (struct comp_unit *unit)
2104 bfd *abfd = unit->abfd;
2105 bfd_byte *info_ptr = unit->first_child_die_ptr;
2106 int nesting_level = 1;
2107 struct funcinfo **nested_funcs;
2108 int nested_funcs_size;
2110 /* Maintain a stack of in-scope functions and inlined functions, which we
2111 can use to set the caller_func field. */
2112 nested_funcs_size = 32;
2113 nested_funcs = (struct funcinfo **)
2114 bfd_malloc (nested_funcs_size * sizeof (struct funcinfo *));
2115 if (nested_funcs == NULL)
2117 nested_funcs[nesting_level] = 0;
2119 while (nesting_level)
2121 unsigned int abbrev_number, bytes_read, i;
2122 struct abbrev_info *abbrev;
2123 struct attribute attr;
2124 struct funcinfo *func;
2125 struct varinfo *var;
2127 bfd_vma high_pc = 0;
2128 bfd_boolean high_pc_relative = FALSE;
2130 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2131 info_ptr += bytes_read;
2133 if (! abbrev_number)
2139 abbrev = lookup_abbrev (abbrev_number,unit->abbrevs);
2142 (*_bfd_error_handler)
2143 (_("Dwarf Error: Could not find abbrev number %u."),
2145 bfd_set_error (bfd_error_bad_value);
2150 if (abbrev->tag == DW_TAG_subprogram
2151 || abbrev->tag == DW_TAG_entry_point
2152 || abbrev->tag == DW_TAG_inlined_subroutine)
2154 bfd_size_type amt = sizeof (struct funcinfo);
2155 func = (struct funcinfo *) bfd_zalloc (abfd, amt);
2158 func->tag = abbrev->tag;
2159 func->prev_func = unit->function_table;
2160 unit->function_table = func;
2161 BFD_ASSERT (!unit->cached);
2163 if (func->tag == DW_TAG_inlined_subroutine)
2164 for (i = nesting_level - 1; i >= 1; i--)
2165 if (nested_funcs[i])
2167 func->caller_func = nested_funcs[i];
2170 nested_funcs[nesting_level] = func;
2175 if (abbrev->tag == DW_TAG_variable)
2177 bfd_size_type amt = sizeof (struct varinfo);
2178 var = (struct varinfo *) bfd_zalloc (abfd, amt);
2181 var->tag = abbrev->tag;
2183 var->prev_var = unit->variable_table;
2184 unit->variable_table = var;
2185 BFD_ASSERT (!unit->cached);
2188 /* No inline function in scope at this nesting level. */
2189 nested_funcs[nesting_level] = 0;
2192 for (i = 0; i < abbrev->num_attrs; ++i)
2194 info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr);
2195 if (info_ptr == NULL)
2202 case DW_AT_call_file:
2203 func->caller_file = concat_filename (unit->line_table,
2207 case DW_AT_call_line:
2208 func->caller_line = attr.u.val;
2211 case DW_AT_abstract_origin:
2212 case DW_AT_specification:
2213 func->name = find_abstract_instance_name (unit, &attr);
2217 /* Prefer DW_AT_MIPS_linkage_name or DW_AT_linkage_name
2219 if (func->name == NULL)
2220 func->name = attr.u.str;
2223 case DW_AT_linkage_name:
2224 case DW_AT_MIPS_linkage_name:
2225 func->name = attr.u.str;
2229 low_pc = attr.u.val;
2233 high_pc = attr.u.val;
2234 high_pc_relative = attr.form != DW_FORM_addr;
2238 if (!read_rangelist (unit, &func->arange, attr.u.val))
2242 case DW_AT_decl_file:
2243 func->file = concat_filename (unit->line_table,
2247 case DW_AT_decl_line:
2248 func->line = attr.u.val;
2260 var->name = attr.u.str;
2263 case DW_AT_decl_file:
2264 var->file = concat_filename (unit->line_table,
2268 case DW_AT_decl_line:
2269 var->line = attr.u.val;
2272 case DW_AT_external:
2273 if (attr.u.val != 0)
2277 case DW_AT_location:
2281 case DW_FORM_block1:
2282 case DW_FORM_block2:
2283 case DW_FORM_block4:
2284 case DW_FORM_exprloc:
2285 if (*attr.u.blk->data == DW_OP_addr)
2289 /* Verify that DW_OP_addr is the only opcode in the
2290 location, in which case the block size will be 1
2291 plus the address size. */
2292 /* ??? For TLS variables, gcc can emit
2293 DW_OP_addr <addr> DW_OP_GNU_push_tls_address
2294 which we don't handle here yet. */
2295 if (attr.u.blk->size == unit->addr_size + 1U)
2296 var->addr = bfd_get (unit->addr_size * 8,
2298 attr.u.blk->data + 1);
2313 if (high_pc_relative)
2316 if (func && high_pc != 0)
2318 if (!arange_add (unit, &func->arange, low_pc, high_pc))
2322 if (abbrev->has_children)
2326 if (nesting_level >= nested_funcs_size)
2328 struct funcinfo **tmp;
2330 nested_funcs_size *= 2;
2331 tmp = (struct funcinfo **)
2332 bfd_realloc (nested_funcs,
2333 nested_funcs_size * sizeof (struct funcinfo *));
2338 nested_funcs[nesting_level] = 0;
2342 free (nested_funcs);
2346 free (nested_funcs);
2350 /* Parse a DWARF2 compilation unit starting at INFO_PTR. This
2351 includes the compilation unit header that proceeds the DIE's, but
2352 does not include the length field that precedes each compilation
2353 unit header. END_PTR points one past the end of this comp unit.
2354 OFFSET_SIZE is the size of DWARF2 offsets (either 4 or 8 bytes).
2356 This routine does not read the whole compilation unit; only enough
2357 to get to the line number information for the compilation unit. */
2359 static struct comp_unit *
2360 parse_comp_unit (struct dwarf2_debug *stash,
2361 bfd_vma unit_length,
2362 bfd_byte *info_ptr_unit,
2363 unsigned int offset_size)
2365 struct comp_unit* unit;
2366 unsigned int version;
2367 bfd_uint64_t abbrev_offset = 0;
2368 unsigned int addr_size;
2369 struct abbrev_info** abbrevs;
2370 unsigned int abbrev_number, bytes_read, i;
2371 struct abbrev_info *abbrev;
2372 struct attribute attr;
2373 bfd_byte *info_ptr = stash->info_ptr;
2374 bfd_byte *end_ptr = info_ptr + unit_length;
2377 bfd_vma high_pc = 0;
2378 bfd *abfd = stash->bfd_ptr;
2379 bfd_boolean high_pc_relative = FALSE;
2381 version = read_2_bytes (abfd, info_ptr);
2383 BFD_ASSERT (offset_size == 4 || offset_size == 8);
2384 if (offset_size == 4)
2385 abbrev_offset = read_4_bytes (abfd, info_ptr);
2387 abbrev_offset = read_8_bytes (abfd, info_ptr);
2388 info_ptr += offset_size;
2389 addr_size = read_1_byte (abfd, info_ptr);
2392 if (version != 2 && version != 3 && version != 4)
2394 (*_bfd_error_handler)
2395 (_("Dwarf Error: found dwarf version '%u', this reader"
2396 " only handles version 2, 3 and 4 information."), version);
2397 bfd_set_error (bfd_error_bad_value);
2401 if (addr_size > sizeof (bfd_vma))
2403 (*_bfd_error_handler)
2404 (_("Dwarf Error: found address size '%u', this reader"
2405 " can not handle sizes greater than '%u'."),
2407 (unsigned int) sizeof (bfd_vma));
2408 bfd_set_error (bfd_error_bad_value);
2412 if (addr_size != 2 && addr_size != 4 && addr_size != 8)
2414 (*_bfd_error_handler)
2415 ("Dwarf Error: found address size '%u', this reader"
2416 " can only handle address sizes '2', '4' and '8'.", addr_size);
2417 bfd_set_error (bfd_error_bad_value);
2421 /* Read the abbrevs for this compilation unit into a table. */
2422 abbrevs = read_abbrevs (abfd, abbrev_offset, stash);
2426 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2427 info_ptr += bytes_read;
2428 if (! abbrev_number)
2430 (*_bfd_error_handler) (_("Dwarf Error: Bad abbrev number: %u."),
2432 bfd_set_error (bfd_error_bad_value);
2436 abbrev = lookup_abbrev (abbrev_number, abbrevs);
2439 (*_bfd_error_handler) (_("Dwarf Error: Could not find abbrev number %u."),
2441 bfd_set_error (bfd_error_bad_value);
2445 amt = sizeof (struct comp_unit);
2446 unit = (struct comp_unit *) bfd_zalloc (abfd, amt);
2450 unit->version = version;
2451 unit->addr_size = addr_size;
2452 unit->offset_size = offset_size;
2453 unit->abbrevs = abbrevs;
2454 unit->end_ptr = end_ptr;
2455 unit->stash = stash;
2456 unit->info_ptr_unit = info_ptr_unit;
2457 unit->sec_info_ptr = stash->sec_info_ptr;
2459 for (i = 0; i < abbrev->num_attrs; ++i)
2461 info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr);
2462 if (info_ptr == NULL)
2465 /* Store the data if it is of an attribute we want to keep in a
2466 partial symbol table. */
2469 case DW_AT_stmt_list:
2471 unit->line_offset = attr.u.val;
2475 unit->name = attr.u.str;
2479 low_pc = attr.u.val;
2480 /* If the compilation unit DIE has a DW_AT_low_pc attribute,
2481 this is the base address to use when reading location
2482 lists or range lists. */
2483 if (abbrev->tag == DW_TAG_compile_unit)
2484 unit->base_address = low_pc;
2488 high_pc = attr.u.val;
2489 high_pc_relative = attr.form != DW_FORM_addr;
2493 if (!read_rangelist (unit, &unit->arange, attr.u.val))
2497 case DW_AT_comp_dir:
2499 char *comp_dir = attr.u.str;
2502 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2503 directory, get rid of it. */
2504 char *cp = strchr (comp_dir, ':');
2506 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
2509 unit->comp_dir = comp_dir;
2517 if (high_pc_relative)
2521 if (!arange_add (unit, &unit->arange, low_pc, high_pc))
2525 unit->first_child_die_ptr = info_ptr;
2529 /* Return TRUE if UNIT may contain the address given by ADDR. When
2530 there are functions written entirely with inline asm statements, the
2531 range info in the compilation unit header may not be correct. We
2532 need to consult the line info table to see if a compilation unit
2533 really contains the given address. */
2536 comp_unit_contains_address (struct comp_unit *unit, bfd_vma addr)
2538 struct arange *arange;
2543 arange = &unit->arange;
2546 if (addr >= arange->low && addr < arange->high)
2548 arange = arange->next;
2555 /* If UNIT contains ADDR, set the output parameters to the values for
2556 the line containing ADDR. The output parameters, FILENAME_PTR,
2557 FUNCTIONNAME_PTR, and LINENUMBER_PTR, are pointers to the objects
2560 Return TRUE if UNIT contains ADDR, and no errors were encountered;
2564 comp_unit_find_nearest_line (struct comp_unit *unit,
2566 const char **filename_ptr,
2567 const char **functionname_ptr,
2568 unsigned int *linenumber_ptr,
2569 unsigned int *discriminator_ptr,
2570 struct dwarf2_debug *stash)
2574 struct funcinfo *function;
2579 if (! unit->line_table)
2581 if (! unit->stmtlist)
2587 unit->line_table = decode_line_info (unit, stash);
2589 if (! unit->line_table)
2595 if (unit->first_child_die_ptr < unit->end_ptr
2596 && ! scan_unit_for_symbols (unit))
2604 func_p = lookup_address_in_function_table (unit, addr,
2605 &function, functionname_ptr);
2606 if (func_p && (function->tag == DW_TAG_inlined_subroutine))
2607 stash->inliner_chain = function;
2608 line_p = lookup_address_in_line_info_table (unit->line_table, addr,
2612 return line_p || func_p;
2615 /* Check to see if line info is already decoded in a comp_unit.
2616 If not, decode it. Returns TRUE if no errors were encountered;
2620 comp_unit_maybe_decode_line_info (struct comp_unit *unit,
2621 struct dwarf2_debug *stash)
2626 if (! unit->line_table)
2628 if (! unit->stmtlist)
2634 unit->line_table = decode_line_info (unit, stash);
2636 if (! unit->line_table)
2642 if (unit->first_child_die_ptr < unit->end_ptr
2643 && ! scan_unit_for_symbols (unit))
2653 /* If UNIT contains SYM at ADDR, set the output parameters to the
2654 values for the line containing SYM. The output parameters,
2655 FILENAME_PTR, and LINENUMBER_PTR, are pointers to the objects to be
2658 Return TRUE if UNIT contains SYM, and no errors were encountered;
2662 comp_unit_find_line (struct comp_unit *unit,
2665 const char **filename_ptr,
2666 unsigned int *linenumber_ptr,
2667 struct dwarf2_debug *stash)
2669 if (!comp_unit_maybe_decode_line_info (unit, stash))
2672 if (sym->flags & BSF_FUNCTION)
2673 return lookup_symbol_in_function_table (unit, sym, addr,
2677 return lookup_symbol_in_variable_table (unit, sym, addr,
2682 static struct funcinfo *
2683 reverse_funcinfo_list (struct funcinfo *head)
2685 struct funcinfo *rhead;
2686 struct funcinfo *temp;
2688 for (rhead = NULL; head; head = temp)
2690 temp = head->prev_func;
2691 head->prev_func = rhead;
2697 static struct varinfo *
2698 reverse_varinfo_list (struct varinfo *head)
2700 struct varinfo *rhead;
2701 struct varinfo *temp;
2703 for (rhead = NULL; head; head = temp)
2705 temp = head->prev_var;
2706 head->prev_var = rhead;
2712 /* Extract all interesting funcinfos and varinfos of a compilation
2713 unit into hash tables for faster lookup. Returns TRUE if no
2714 errors were enountered; FALSE otherwise. */
2717 comp_unit_hash_info (struct dwarf2_debug *stash,
2718 struct comp_unit *unit,
2719 struct info_hash_table *funcinfo_hash_table,
2720 struct info_hash_table *varinfo_hash_table)
2722 struct funcinfo* each_func;
2723 struct varinfo* each_var;
2724 bfd_boolean okay = TRUE;
2726 BFD_ASSERT (stash->info_hash_status != STASH_INFO_HASH_DISABLED);
2728 if (!comp_unit_maybe_decode_line_info (unit, stash))
2731 BFD_ASSERT (!unit->cached);
2733 /* To preserve the original search order, we went to visit the function
2734 infos in the reversed order of the list. However, making the list
2735 bi-directional use quite a bit of extra memory. So we reverse
2736 the list first, traverse the list in the now reversed order and
2737 finally reverse the list again to get back the original order. */
2738 unit->function_table = reverse_funcinfo_list (unit->function_table);
2739 for (each_func = unit->function_table;
2741 each_func = each_func->prev_func)
2743 /* Skip nameless functions. */
2744 if (each_func->name)
2745 /* There is no need to copy name string into hash table as
2746 name string is either in the dwarf string buffer or
2747 info in the stash. */
2748 okay = insert_info_hash_table (funcinfo_hash_table, each_func->name,
2749 (void*) each_func, FALSE);
2751 unit->function_table = reverse_funcinfo_list (unit->function_table);
2755 /* We do the same for variable infos. */
2756 unit->variable_table = reverse_varinfo_list (unit->variable_table);
2757 for (each_var = unit->variable_table;
2759 each_var = each_var->prev_var)
2761 /* Skip stack vars and vars with no files or names. */
2762 if (each_var->stack == 0
2763 && each_var->file != NULL
2764 && each_var->name != NULL)
2765 /* There is no need to copy name string into hash table as
2766 name string is either in the dwarf string buffer or
2767 info in the stash. */
2768 okay = insert_info_hash_table (varinfo_hash_table, each_var->name,
2769 (void*) each_var, FALSE);
2772 unit->variable_table = reverse_varinfo_list (unit->variable_table);
2773 unit->cached = TRUE;
2777 /* Locate a section in a BFD containing debugging info. The search starts
2778 from the section after AFTER_SEC, or from the first section in the BFD if
2779 AFTER_SEC is NULL. The search works by examining the names of the
2780 sections. There are three permissiable names. The first two are given
2781 by DEBUG_SECTIONS[debug_info] (whose standard DWARF2 names are .debug_info
2782 and .zdebug_info). The third is a prefix .gnu.linkonce.wi.
2783 This is a variation on the .debug_info section which has a checksum
2784 describing the contents appended onto the name. This allows the linker to
2785 identify and discard duplicate debugging sections for different
2786 compilation units. */
2787 #define GNU_LINKONCE_INFO ".gnu.linkonce.wi."
2790 find_debug_info (bfd *abfd, const struct dwarf_debug_section *debug_sections,
2791 asection *after_sec)
2796 if (after_sec == NULL)
2798 look = debug_sections[debug_info].uncompressed_name;
2799 msec = bfd_get_section_by_name (abfd, look);
2803 look = debug_sections[debug_info].compressed_name;
2806 msec = bfd_get_section_by_name (abfd, look);
2811 for (msec = abfd->sections; msec != NULL; msec = msec->next)
2812 if (CONST_STRNEQ (msec->name, GNU_LINKONCE_INFO))
2818 for (msec = after_sec->next; msec != NULL; msec = msec->next)
2820 look = debug_sections[debug_info].uncompressed_name;
2821 if (strcmp (msec->name, look) == 0)
2824 look = debug_sections[debug_info].compressed_name;
2825 if (look != NULL && strcmp (msec->name, look) == 0)
2828 if (CONST_STRNEQ (msec->name, GNU_LINKONCE_INFO))
2835 /* Unset vmas for adjusted sections in STASH. */
2838 unset_sections (struct dwarf2_debug *stash)
2841 struct adjusted_section *p;
2843 i = stash->adjusted_section_count;
2844 p = stash->adjusted_sections;
2845 for (; i > 0; i--, p++)
2846 p->section->vma = 0;
2849 /* Set unique VMAs for loadable and DWARF sections in ABFD and save
2850 VMAs in STASH for unset_sections. */
2853 place_sections (bfd *abfd, struct dwarf2_debug *stash)
2855 struct adjusted_section *p;
2858 if (stash->adjusted_section_count != 0)
2860 i = stash->adjusted_section_count;
2861 p = stash->adjusted_sections;
2862 for (; i > 0; i--, p++)
2863 p->section->vma = p->adj_vma;
2868 bfd_vma last_vma = 0, last_dwarf = 0;
2870 const char *debug_info_name;
2872 debug_info_name = stash->debug_sections[debug_info].uncompressed_name;
2874 for (sect = abfd->sections; sect != NULL; sect = sect->next)
2882 /* We need to adjust the VMAs of any .debug_info sections.
2883 Skip compressed ones, since no relocations could target
2884 them - they should not appear in object files anyway. */
2885 if (strcmp (sect->name, debug_info_name) == 0)
2887 else if (CONST_STRNEQ (sect->name, GNU_LINKONCE_INFO))
2892 if (!is_debug_info && (sect->flags & SEC_LOAD) == 0)
2895 sz = sect->rawsize ? sect->rawsize : sect->size;
2902 amt = i * sizeof (struct adjusted_section);
2903 p = (struct adjusted_section *) bfd_alloc (abfd, amt);
2907 stash->adjusted_sections = p;
2908 stash->adjusted_section_count = i;
2910 for (sect = abfd->sections; sect != NULL; sect = sect->next)
2918 /* We need to adjust the VMAs of any .debug_info sections.
2919 Skip compressed ones, since no relocations could target
2920 them - they should not appear in object files anyway. */
2921 if (strcmp (sect->name, debug_info_name) == 0)
2923 else if (CONST_STRNEQ (sect->name, GNU_LINKONCE_INFO))
2928 if (!is_debug_info && (sect->flags & SEC_LOAD) == 0)
2931 sz = sect->rawsize ? sect->rawsize : sect->size;
2938 BFD_ASSERT (sect->alignment_power == 0);
2939 sect->vma = last_dwarf;
2942 else if (last_vma != 0)
2944 /* Align the new address to the current section
2946 last_vma = ((last_vma
2947 + ~((bfd_vma) -1 << sect->alignment_power))
2948 & ((bfd_vma) -1 << sect->alignment_power));
2949 sect->vma = last_vma;
2950 last_vma += sect->vma + sz;
2953 last_vma += sect->vma + sz;
2955 p->adj_vma = sect->vma;
2964 /* Look up a funcinfo by name using the given info hash table. If found,
2965 also update the locations pointed to by filename_ptr and linenumber_ptr.
2967 This function returns TRUE if a funcinfo that matches the given symbol
2968 and address is found with any error; otherwise it returns FALSE. */
2971 info_hash_lookup_funcinfo (struct info_hash_table *hash_table,
2974 const char **filename_ptr,
2975 unsigned int *linenumber_ptr)
2977 struct funcinfo* each_func;
2978 struct funcinfo* best_fit = NULL;
2979 struct info_list_node *node;
2980 struct arange *arange;
2981 const char *name = bfd_asymbol_name (sym);
2982 asection *sec = bfd_get_section (sym);
2984 for (node = lookup_info_hash_table (hash_table, name);
2988 each_func = (struct funcinfo *) node->info;
2989 for (arange = &each_func->arange;
2991 arange = arange->next)
2993 if ((!each_func->sec || each_func->sec == sec)
2994 && addr >= arange->low
2995 && addr < arange->high
2997 || (arange->high - arange->low
2998 < best_fit->arange.high - best_fit->arange.low)))
2999 best_fit = each_func;
3005 best_fit->sec = sec;
3006 *filename_ptr = best_fit->file;
3007 *linenumber_ptr = best_fit->line;
3014 /* Look up a varinfo by name using the given info hash table. If found,
3015 also update the locations pointed to by filename_ptr and linenumber_ptr.
3017 This function returns TRUE if a varinfo that matches the given symbol
3018 and address is found with any error; otherwise it returns FALSE. */
3021 info_hash_lookup_varinfo (struct info_hash_table *hash_table,
3024 const char **filename_ptr,
3025 unsigned int *linenumber_ptr)
3027 const char *name = bfd_asymbol_name (sym);
3028 asection *sec = bfd_get_section (sym);
3029 struct varinfo* each;
3030 struct info_list_node *node;
3032 for (node = lookup_info_hash_table (hash_table, name);
3036 each = (struct varinfo *) node->info;
3037 if (each->addr == addr
3038 && (!each->sec || each->sec == sec))
3041 *filename_ptr = each->file;
3042 *linenumber_ptr = each->line;
3050 /* Update the funcinfo and varinfo info hash tables if they are
3051 not up to date. Returns TRUE if there is no error; otherwise
3052 returns FALSE and disable the info hash tables. */
3055 stash_maybe_update_info_hash_tables (struct dwarf2_debug *stash)
3057 struct comp_unit *each;
3059 /* Exit if hash tables are up-to-date. */
3060 if (stash->all_comp_units == stash->hash_units_head)
3063 if (stash->hash_units_head)
3064 each = stash->hash_units_head->prev_unit;
3066 each = stash->last_comp_unit;
3070 if (!comp_unit_hash_info (stash, each, stash->funcinfo_hash_table,
3071 stash->varinfo_hash_table))
3073 stash->info_hash_status = STASH_INFO_HASH_DISABLED;
3076 each = each->prev_unit;
3079 stash->hash_units_head = stash->all_comp_units;
3083 /* Check consistency of info hash tables. This is for debugging only. */
3085 static void ATTRIBUTE_UNUSED
3086 stash_verify_info_hash_table (struct dwarf2_debug *stash)
3088 struct comp_unit *each_unit;
3089 struct funcinfo *each_func;
3090 struct varinfo *each_var;
3091 struct info_list_node *node;
3094 for (each_unit = stash->all_comp_units;
3096 each_unit = each_unit->next_unit)
3098 for (each_func = each_unit->function_table;
3100 each_func = each_func->prev_func)
3102 if (!each_func->name)
3104 node = lookup_info_hash_table (stash->funcinfo_hash_table,
3108 while (node && !found)
3110 found = node->info == each_func;
3116 for (each_var = each_unit->variable_table;
3118 each_var = each_var->prev_var)
3120 if (!each_var->name || !each_var->file || each_var->stack)
3122 node = lookup_info_hash_table (stash->varinfo_hash_table,
3126 while (node && !found)
3128 found = node->info == each_var;
3136 /* Check to see if we want to enable the info hash tables, which consume
3137 quite a bit of memory. Currently we only check the number times
3138 bfd_dwarf2_find_line is called. In the future, we may also want to
3139 take the number of symbols into account. */
3142 stash_maybe_enable_info_hash_tables (bfd *abfd, struct dwarf2_debug *stash)
3144 BFD_ASSERT (stash->info_hash_status == STASH_INFO_HASH_OFF);
3146 if (stash->info_hash_count++ < STASH_INFO_HASH_TRIGGER)
3149 /* FIXME: Maybe we should check the reduce_memory_overheads
3150 and optimize fields in the bfd_link_info structure ? */
3152 /* Create hash tables. */
3153 stash->funcinfo_hash_table = create_info_hash_table (abfd);
3154 stash->varinfo_hash_table = create_info_hash_table (abfd);
3155 if (!stash->funcinfo_hash_table || !stash->varinfo_hash_table)
3157 /* Turn off info hashes if any allocation above fails. */
3158 stash->info_hash_status = STASH_INFO_HASH_DISABLED;
3161 /* We need a forced update so that the info hash tables will
3162 be created even though there is no compilation unit. That
3163 happens if STASH_INFO_HASH_TRIGGER is 0. */
3164 stash_maybe_update_info_hash_tables (stash);
3165 stash->info_hash_status = STASH_INFO_HASH_ON;
3168 /* Find the file and line associated with a symbol and address using the
3169 info hash tables of a stash. If there is a match, the function returns
3170 TRUE and update the locations pointed to by filename_ptr and linenumber_ptr;
3171 otherwise it returns FALSE. */
3174 stash_find_line_fast (struct dwarf2_debug *stash,
3177 const char **filename_ptr,
3178 unsigned int *linenumber_ptr)
3180 BFD_ASSERT (stash->info_hash_status == STASH_INFO_HASH_ON);
3182 if (sym->flags & BSF_FUNCTION)
3183 return info_hash_lookup_funcinfo (stash->funcinfo_hash_table, sym, addr,
3184 filename_ptr, linenumber_ptr);
3185 return info_hash_lookup_varinfo (stash->varinfo_hash_table, sym, addr,
3186 filename_ptr, linenumber_ptr);
3189 /* Read debug information from DEBUG_BFD when DEBUG_BFD is specified.
3190 If DEBUG_BFD is not specified, we read debug information from ABFD
3191 or its gnu_debuglink. The results will be stored in PINFO.
3192 The function returns TRUE iff debug information is ready. */
3195 _bfd_dwarf2_slurp_debug_info (bfd *abfd, bfd *debug_bfd,
3196 const struct dwarf_debug_section *debug_sections,
3200 bfd_size_type amt = sizeof (struct dwarf2_debug);
3201 bfd_size_type total_size;
3203 struct dwarf2_debug *stash = (struct dwarf2_debug *) *pinfo;
3208 stash = (struct dwarf2_debug *) bfd_zalloc (abfd, amt);
3211 stash->debug_sections = debug_sections;
3212 stash->syms = symbols;
3216 if (debug_bfd == NULL)
3219 msec = find_debug_info (debug_bfd, debug_sections, NULL);
3220 if (msec == NULL && abfd == debug_bfd)
3222 char * debug_filename = bfd_follow_gnu_debuglink (abfd, DEBUGDIR);
3224 if (debug_filename == NULL)
3225 /* No dwarf2 info, and no gnu_debuglink to follow.
3226 Note that at this point the stash has been allocated, but
3227 contains zeros. This lets future calls to this function
3228 fail more quickly. */
3231 if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL
3232 || ! bfd_check_format (debug_bfd, bfd_object)
3233 || (msec = find_debug_info (debug_bfd,
3234 debug_sections, NULL)) == NULL)
3237 bfd_close (debug_bfd);
3238 /* FIXME: Should we report our failure to follow the debuglink ? */
3239 free (debug_filename);
3242 stash->close_on_cleanup = TRUE;
3244 stash->bfd_ptr = debug_bfd;
3246 /* There can be more than one DWARF2 info section in a BFD these
3247 days. First handle the easy case when there's only one. If
3248 there's more than one, try case two: none of the sections is
3249 compressed. In that case, read them all in and produce one
3250 large stash. We do this in two passes - in the first pass we
3251 just accumulate the section sizes, and in the second pass we
3252 read in the section's contents. (The allows us to avoid
3253 reallocing the data as we add sections to the stash.) If
3254 some or all sections are compressed, then do things the slow
3255 way, with a bunch of reallocs. */
3257 if (! find_debug_info (debug_bfd, debug_sections, msec))
3259 /* Case 1: only one info section. */
3260 total_size = msec->size;
3261 if (! read_section (debug_bfd, &stash->debug_sections[debug_info],
3263 &stash->info_ptr_memory, &total_size))
3268 /* Case 2: multiple sections. */
3269 for (total_size = 0;
3271 msec = find_debug_info (debug_bfd, debug_sections, msec))
3272 total_size += msec->size;
3274 stash->info_ptr_memory = (bfd_byte *) bfd_malloc (total_size);
3275 if (stash->info_ptr_memory == NULL)
3279 for (msec = find_debug_info (debug_bfd, debug_sections, NULL);
3281 msec = find_debug_info (debug_bfd, debug_sections, msec))
3289 if (!(bfd_simple_get_relocated_section_contents
3290 (debug_bfd, msec, stash->info_ptr_memory + total_size,
3298 stash->info_ptr = stash->info_ptr_memory;
3299 stash->info_ptr_end = stash->info_ptr + total_size;
3300 stash->sec = find_debug_info (debug_bfd, debug_sections, NULL);
3301 stash->sec_info_ptr = stash->info_ptr;
3305 /* Find the source code location of SYMBOL. If SYMBOL is NULL
3306 then find the nearest source code location corresponding to
3307 the address SECTION + OFFSET.
3308 Returns TRUE if the line is found without error and fills in
3309 FILENAME_PTR and LINENUMBER_PTR. In the case where SYMBOL was
3310 NULL the FUNCTIONNAME_PTR is also filled in.
3311 SYMBOLS contains the symbol table for ABFD.
3312 DEBUG_SECTIONS contains the name of the dwarf debug sections.
3313 ADDR_SIZE is the number of bytes in the initial .debug_info length
3314 field and in the abbreviation offset, or zero to indicate that the
3315 default value should be used. */
3318 find_line (bfd *abfd,
3319 const struct dwarf_debug_section *debug_sections,
3324 const char **filename_ptr,
3325 const char **functionname_ptr,
3326 unsigned int *linenumber_ptr,
3327 unsigned int *discriminator_ptr,
3328 unsigned int addr_size,
3331 /* Read each compilation unit from the section .debug_info, and check
3332 to see if it contains the address we are searching for. If yes,
3333 lookup the address, and return the line number info. If no, go
3334 on to the next compilation unit.
3336 We keep a list of all the previously read compilation units, and
3337 a pointer to the next un-read compilation unit. Check the
3338 previously read units before reading more. */
3339 struct dwarf2_debug *stash;
3340 /* What address are we looking for? */
3342 struct comp_unit* each;
3343 bfd_vma found = FALSE;
3344 bfd_boolean do_line;
3346 *filename_ptr = NULL;
3347 if (functionname_ptr != NULL)
3348 *functionname_ptr = NULL;
3349 *linenumber_ptr = 0;
3350 if (discriminator_ptr)
3351 *discriminator_ptr = 0;
3353 if (! _bfd_dwarf2_slurp_debug_info (abfd, NULL,
3354 debug_sections, symbols, pinfo))
3357 stash = (struct dwarf2_debug *) *pinfo;
3359 /* In a relocatable file, 2 functions may have the same address.
3360 We change the section vma so that they won't overlap. */
3361 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
3363 if (! place_sections (abfd, stash))
3367 do_line = (section == NULL
3369 && functionname_ptr == NULL
3373 addr = symbol->value;
3374 section = bfd_get_section (symbol);
3376 else if (section != NULL
3377 && functionname_ptr != NULL
3383 if (section->output_section)
3384 addr += section->output_section->vma + section->output_offset;
3386 addr += section->vma;
3388 /* A null info_ptr indicates that there is no dwarf2 info
3389 (or that an error occured while setting up the stash). */
3390 if (! stash->info_ptr)
3393 stash->inliner_chain = NULL;
3395 /* Check the previously read comp. units first. */
3398 /* The info hash tables use quite a bit of memory. We may not want to
3399 always use them. We use some heuristics to decide if and when to
3401 if (stash->info_hash_status == STASH_INFO_HASH_OFF)
3402 stash_maybe_enable_info_hash_tables (abfd, stash);
3404 /* Keep info hash table up to date if they are available. Note that we
3405 may disable the hash tables if there is any error duing update. */
3406 if (stash->info_hash_status == STASH_INFO_HASH_ON)
3407 stash_maybe_update_info_hash_tables (stash);
3409 if (stash->info_hash_status == STASH_INFO_HASH_ON)
3411 found = stash_find_line_fast (stash, symbol, addr, filename_ptr,
3418 /* Check the previously read comp. units first. */
3419 for (each = stash->all_comp_units; each; each = each->next_unit)
3420 if ((symbol->flags & BSF_FUNCTION) == 0
3421 || each->arange.high == 0
3422 || comp_unit_contains_address (each, addr))
3424 found = comp_unit_find_line (each, symbol, addr, filename_ptr,
3425 linenumber_ptr, stash);
3433 for (each = stash->all_comp_units; each; each = each->next_unit)
3435 found = ((each->arange.high == 0
3436 || comp_unit_contains_address (each, addr))
3437 && comp_unit_find_nearest_line (each, addr,
3448 /* The DWARF2 spec says that the initial length field, and the
3449 offset of the abbreviation table, should both be 4-byte values.
3450 However, some compilers do things differently. */
3453 BFD_ASSERT (addr_size == 4 || addr_size == 8);
3455 /* Read each remaining comp. units checking each as they are read. */
3456 while (stash->info_ptr < stash->info_ptr_end)
3459 unsigned int offset_size = addr_size;
3460 bfd_byte *info_ptr_unit = stash->info_ptr;
3462 length = read_4_bytes (stash->bfd_ptr, stash->info_ptr);
3463 /* A 0xffffff length is the DWARF3 way of indicating
3464 we use 64-bit offsets, instead of 32-bit offsets. */
3465 if (length == 0xffffffff)
3468 length = read_8_bytes (stash->bfd_ptr, stash->info_ptr + 4);
3469 stash->info_ptr += 12;
3471 /* A zero length is the IRIX way of indicating 64-bit offsets,
3472 mostly because the 64-bit length will generally fit in 32
3473 bits, and the endianness helps. */
3474 else if (length == 0)
3477 length = read_4_bytes (stash->bfd_ptr, stash->info_ptr + 4);
3478 stash->info_ptr += 8;
3480 /* In the absence of the hints above, we assume 32-bit DWARF2
3481 offsets even for targets with 64-bit addresses, because:
3482 a) most of the time these targets will not have generated
3483 more than 2Gb of debug info and so will not need 64-bit
3486 b) if they do use 64-bit offsets but they are not using
3487 the size hints that are tested for above then they are
3488 not conforming to the DWARF3 standard anyway. */
3489 else if (addr_size == 8)
3492 stash->info_ptr += 4;
3495 stash->info_ptr += 4;
3499 each = parse_comp_unit (stash, length, info_ptr_unit,
3502 /* The dwarf information is damaged, don't trust it any
3505 stash->info_ptr += length;
3507 if (stash->all_comp_units)
3508 stash->all_comp_units->prev_unit = each;
3510 stash->last_comp_unit = each;
3512 each->next_unit = stash->all_comp_units;
3513 stash->all_comp_units = each;
3515 /* DW_AT_low_pc and DW_AT_high_pc are optional for
3516 compilation units. If we don't have them (i.e.,
3517 unit->high == 0), we need to consult the line info table
3518 to see if a compilation unit contains the given
3521 found = (((symbol->flags & BSF_FUNCTION) == 0
3522 || each->arange.high == 0
3523 || comp_unit_contains_address (each, addr))
3524 && comp_unit_find_line (each, symbol, addr,
3529 found = ((each->arange.high == 0
3530 || comp_unit_contains_address (each, addr))
3531 && comp_unit_find_nearest_line (each, addr,
3538 if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr)
3539 == stash->sec->size)
3541 stash->sec = find_debug_info (stash->bfd_ptr, debug_sections,
3543 stash->sec_info_ptr = stash->info_ptr;
3552 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
3553 unset_sections (stash);
3558 /* The DWARF2 version of find_nearest_line.
3559 Return TRUE if the line is found without error. */
3562 _bfd_dwarf2_find_nearest_line (bfd *abfd,
3563 const struct dwarf_debug_section *debug_sections,
3567 const char **filename_ptr,
3568 const char **functionname_ptr,
3569 unsigned int *linenumber_ptr,
3570 unsigned int *discriminator_ptr,
3571 unsigned int addr_size,
3574 return find_line (abfd, debug_sections, section, offset, NULL, symbols,
3575 filename_ptr, functionname_ptr, linenumber_ptr,
3576 discriminator_ptr, addr_size, pinfo);
3579 /* The DWARF2 version of find_line.
3580 Return TRUE if the line is found without error. */
3583 _bfd_dwarf2_find_line (bfd *abfd,
3586 const char **filename_ptr,
3587 unsigned int *linenumber_ptr,
3588 unsigned int *discriminator_ptr,
3589 unsigned int addr_size,
3592 return find_line (abfd, dwarf_debug_sections, NULL, 0, symbol, symbols,
3593 filename_ptr, NULL, linenumber_ptr, discriminator_ptr,
3598 _bfd_dwarf2_find_inliner_info (bfd *abfd ATTRIBUTE_UNUSED,
3599 const char **filename_ptr,
3600 const char **functionname_ptr,
3601 unsigned int *linenumber_ptr,
3604 struct dwarf2_debug *stash;
3606 stash = (struct dwarf2_debug *) *pinfo;
3609 struct funcinfo *func = stash->inliner_chain;
3611 if (func && func->caller_func)
3613 *filename_ptr = func->caller_file;
3614 *functionname_ptr = func->caller_func->name;
3615 *linenumber_ptr = func->caller_line;
3616 stash->inliner_chain = func->caller_func;
3625 _bfd_dwarf2_cleanup_debug_info (bfd *abfd, void **pinfo)
3627 struct dwarf2_debug *stash = (struct dwarf2_debug *) *pinfo;
3628 struct comp_unit *each;
3630 if (abfd == NULL || stash == NULL)
3633 for (each = stash->all_comp_units; each; each = each->next_unit)
3635 struct abbrev_info **abbrevs = each->abbrevs;
3636 struct funcinfo *function_table = each->function_table;
3637 struct varinfo *variable_table = each->variable_table;
3640 for (i = 0; i < ABBREV_HASH_SIZE; i++)
3642 struct abbrev_info *abbrev = abbrevs[i];
3646 free (abbrev->attrs);
3647 abbrev = abbrev->next;
3651 if (each->line_table)
3653 free (each->line_table->dirs);
3654 free (each->line_table->files);
3657 while (function_table)
3659 if (function_table->file)
3661 free (function_table->file);
3662 function_table->file = NULL;
3665 if (function_table->caller_file)
3667 free (function_table->caller_file);
3668 function_table->caller_file = NULL;
3670 function_table = function_table->prev_func;
3673 while (variable_table)
3675 if (variable_table->file)
3677 free (variable_table->file);
3678 variable_table->file = NULL;
3681 variable_table = variable_table->prev_var;
3685 if (stash->dwarf_abbrev_buffer)
3686 free (stash->dwarf_abbrev_buffer);
3687 if (stash->dwarf_line_buffer)
3688 free (stash->dwarf_line_buffer);
3689 if (stash->dwarf_str_buffer)
3690 free (stash->dwarf_str_buffer);
3691 if (stash->dwarf_ranges_buffer)
3692 free (stash->dwarf_ranges_buffer);
3693 if (stash->info_ptr_memory)
3694 free (stash->info_ptr_memory);
3695 if (stash->close_on_cleanup)
3696 bfd_close (stash->bfd_ptr);