diff options
Diffstat (limited to 'binutils-2.17/bfd/dwarf2.c')
| -rw-r--r-- | binutils-2.17/bfd/dwarf2.c | 2798 |
1 files changed, 0 insertions, 2798 deletions
diff --git a/binutils-2.17/bfd/dwarf2.c b/binutils-2.17/bfd/dwarf2.c deleted file mode 100644 index ae68d188..00000000 --- a/binutils-2.17/bfd/dwarf2.c +++ /dev/null @@ -1,2798 +0,0 @@ -/* DWARF 2 support. - Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, - 2004, 2005, 2006 Free Software Foundation, Inc. - - Adapted from gdb/dwarf2read.c by Gavin Koch of Cygnus Solutions - (gavin@cygnus.com). - - From the dwarf2read.c header: - Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, - Inc. with support from Florida State University (under contract - with the Ada Joint Program Office), and Silicon Graphics, Inc. - Initial contribution by Brent Benson, Harris Computer Systems, Inc., - based on Fred Fish's (Cygnus Support) implementation of DWARF 1 - support in dwarfread.c - - This file is part of BFD. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or (at - your option) any later version. - - This program is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ - -#include "bfd.h" -#include "sysdep.h" -#include "libiberty.h" -#include "libbfd.h" -#include "elf-bfd.h" -#include "elf/dwarf2.h" - -/* The data in the .debug_line statement prologue looks like this. */ - -struct line_head -{ - bfd_vma total_length; - unsigned short version; - bfd_vma prologue_length; - unsigned char minimum_instruction_length; - unsigned char default_is_stmt; - int line_base; - unsigned char line_range; - unsigned char opcode_base; - unsigned char *standard_opcode_lengths; -}; - -/* Attributes have a name and a value. */ - -struct attribute -{ - enum dwarf_attribute name; - enum dwarf_form form; - union - { - char *str; - struct dwarf_block *blk; - bfd_uint64_t val; - bfd_int64_t sval; - } - u; -}; - -/* Blocks are a bunch of untyped bytes. */ -struct dwarf_block -{ - unsigned int size; - bfd_byte *data; -}; - -struct loadable_section -{ - asection *section; - bfd_vma adj_vma; -}; - -struct dwarf2_debug -{ - /* A list of all previously read comp_units. */ - struct comp_unit *all_comp_units; - - /* The next unread compilation unit within the .debug_info section. - Zero indicates that the .debug_info section has not been loaded - into a buffer yet. */ - bfd_byte *info_ptr; - - /* Pointer to the end of the .debug_info section memory buffer. */ - bfd_byte *info_ptr_end; - - /* Pointer to the section and address of the beginning of the - section. */ - asection *sec; - bfd_byte *sec_info_ptr; - - /* Pointer to the symbol table. */ - asymbol **syms; - - /* Pointer to the .debug_abbrev section loaded into memory. */ - bfd_byte *dwarf_abbrev_buffer; - - /* Length of the loaded .debug_abbrev section. */ - unsigned long dwarf_abbrev_size; - - /* Buffer for decode_line_info. */ - bfd_byte *dwarf_line_buffer; - - /* Length of the loaded .debug_line section. */ - unsigned long dwarf_line_size; - - /* Pointer to the .debug_str section loaded into memory. */ - bfd_byte *dwarf_str_buffer; - - /* Length of the loaded .debug_str section. */ - unsigned long dwarf_str_size; - - /* Pointer to the .debug_ranges section loaded into memory. */ - bfd_byte *dwarf_ranges_buffer; - - /* Length of the loaded .debug_ranges section. */ - unsigned long dwarf_ranges_size; - - /* If the most recent call to bfd_find_nearest_line was given an - address in an inlined function, preserve a pointer into the - calling chain for subsequent calls to bfd_find_inliner_info to - use. */ - struct funcinfo *inliner_chain; - - /* Number of loadable sections. */ - unsigned int loadable_section_count; - - /* Array of loadable sections. */ - struct loadable_section *loadable_sections; -}; - -struct arange -{ - struct arange *next; - bfd_vma low; - bfd_vma high; -}; - -/* A minimal decoding of DWARF2 compilation units. We only decode - what's needed to get to the line number information. */ - -struct comp_unit -{ - /* Chain the previously read compilation units. */ - struct comp_unit *next_unit; - - /* Keep the bfd convenient (for memory allocation). */ - bfd *abfd; - - /* The lowest and highest addresses contained in this compilation - unit as specified in the compilation unit header. */ - struct arange arange; - - /* The DW_AT_name attribute (for error messages). */ - char *name; - - /* The abbrev hash table. */ - struct abbrev_info **abbrevs; - - /* Note that an error was found by comp_unit_find_nearest_line. */ - int error; - - /* The DW_AT_comp_dir attribute. */ - char *comp_dir; - - /* TRUE if there is a line number table associated with this comp. unit. */ - int stmtlist; - - /* Pointer to the current comp_unit so that we can find a given entry - by its reference. */ - bfd_byte *info_ptr_unit; - - /* The offset into .debug_line of the line number table. */ - unsigned long line_offset; - - /* Pointer to the first child die for the comp unit. */ - bfd_byte *first_child_die_ptr; - - /* The end of the comp unit. */ - bfd_byte *end_ptr; - - /* The decoded line number, NULL if not yet decoded. */ - struct line_info_table *line_table; - - /* A list of the functions found in this comp. unit. */ - struct funcinfo *function_table; - - /* A list of the variables found in this comp. unit. */ - struct varinfo *variable_table; - - /* Pointer to dwarf2_debug structure. */ - struct dwarf2_debug *stash; - - /* Address size for this unit - from unit header. */ - unsigned char addr_size; - - /* Offset size for this unit - from unit header. */ - unsigned char offset_size; - - /* Base address for this unit - from DW_AT_low_pc attribute of - DW_TAG_compile_unit DIE */ - bfd_vma base_address; -}; - -/* This data structure holds the information of an abbrev. */ -struct abbrev_info -{ - unsigned int number; /* Number identifying abbrev. */ - enum dwarf_tag tag; /* DWARF tag. */ - int has_children; /* Boolean. */ - unsigned int num_attrs; /* Number of attributes. */ - struct attr_abbrev *attrs; /* An array of attribute descriptions. */ - struct abbrev_info *next; /* Next in chain. */ -}; - -struct attr_abbrev -{ - enum dwarf_attribute name; - enum dwarf_form form; -}; - -#ifndef ABBREV_HASH_SIZE -#define ABBREV_HASH_SIZE 121 -#endif -#ifndef ATTR_ALLOC_CHUNK -#define ATTR_ALLOC_CHUNK 4 -#endif - -/* VERBATIM - The following function up to the END VERBATIM mark are - copied directly from dwarf2read.c. */ - -/* Read dwarf information from a buffer. */ - -static unsigned int -read_1_byte (bfd *abfd ATTRIBUTE_UNUSED, bfd_byte *buf) -{ - return bfd_get_8 (abfd, buf); -} - -static int -read_1_signed_byte (bfd *abfd ATTRIBUTE_UNUSED, bfd_byte *buf) -{ - return bfd_get_signed_8 (abfd, buf); -} - -static unsigned int -read_2_bytes (bfd *abfd, bfd_byte *buf) -{ - return bfd_get_16 (abfd, buf); -} - -static unsigned int -read_4_bytes (bfd *abfd, bfd_byte *buf) -{ - return bfd_get_32 (abfd, buf); -} - -static bfd_uint64_t -read_8_bytes (bfd *abfd, bfd_byte *buf) -{ - return bfd_get_64 (abfd, buf); -} - -static bfd_byte * -read_n_bytes (bfd *abfd ATTRIBUTE_UNUSED, - bfd_byte *buf, - unsigned int size ATTRIBUTE_UNUSED) -{ - /* If the size of a host char is 8 bits, we can return a pointer - to the buffer, otherwise we have to copy the data to a buffer - allocated on the temporary obstack. */ - return buf; -} - -static char * -read_string (bfd *abfd ATTRIBUTE_UNUSED, - bfd_byte *buf, - unsigned int *bytes_read_ptr) -{ - /* Return a pointer to the embedded string. */ - char *str = (char *) buf; - if (*str == '\0') - { - *bytes_read_ptr = 1; - return NULL; - } - - *bytes_read_ptr = strlen (str) + 1; - return str; -} - -static char * -read_indirect_string (struct comp_unit* unit, - bfd_byte *buf, - unsigned int *bytes_read_ptr) -{ - bfd_uint64_t offset; - struct dwarf2_debug *stash = unit->stash; - char *str; - - if (unit->offset_size == 4) - offset = read_4_bytes (unit->abfd, buf); - else - offset = read_8_bytes (unit->abfd, buf); - *bytes_read_ptr = unit->offset_size; - - if (! stash->dwarf_str_buffer) - { - asection *msec; - bfd *abfd = unit->abfd; - bfd_size_type sz; - - msec = bfd_get_section_by_name (abfd, ".debug_str"); - if (! msec) - { - (*_bfd_error_handler) - (_("Dwarf Error: Can't find .debug_str section.")); - bfd_set_error (bfd_error_bad_value); - return NULL; - } - - sz = msec->rawsize ? msec->rawsize : msec->size; - stash->dwarf_str_size = sz; - stash->dwarf_str_buffer = bfd_alloc (abfd, sz); - if (! stash->dwarf_str_buffer) - return NULL; - - if (! bfd_get_section_contents (abfd, msec, stash->dwarf_str_buffer, - 0, sz)) - return NULL; - } - - if (offset >= stash->dwarf_str_size) - { - (*_bfd_error_handler) (_("Dwarf Error: DW_FORM_strp offset (%lu) greater than or equal to .debug_str size (%lu)."), - (unsigned long) offset, stash->dwarf_str_size); - bfd_set_error (bfd_error_bad_value); - return NULL; - } - - str = (char *) stash->dwarf_str_buffer + offset; - if (*str == '\0') - return NULL; - return str; -} - -/* END VERBATIM */ - -static bfd_uint64_t -read_address (struct comp_unit *unit, bfd_byte *buf) -{ - int signed_vma = get_elf_backend_data (unit->abfd)->sign_extend_vma; - - if (signed_vma) - { - switch (unit->addr_size) - { - case 8: - return bfd_get_signed_64 (unit->abfd, buf); - case 4: - return bfd_get_signed_32 (unit->abfd, buf); - case 2: - return bfd_get_signed_16 (unit->abfd, buf); - default: - abort (); - } - } - else - { - switch (unit->addr_size) - { - case 8: - return bfd_get_64 (unit->abfd, buf); - case 4: - return bfd_get_32 (unit->abfd, buf); - case 2: - return bfd_get_16 (unit->abfd, buf); - default: - abort (); - } - } -} - -/* Lookup an abbrev_info structure in the abbrev hash table. */ - -static struct abbrev_info * -lookup_abbrev (unsigned int number, struct abbrev_info **abbrevs) -{ - unsigned int hash_number; - struct abbrev_info *abbrev; - - hash_number = number % ABBREV_HASH_SIZE; - abbrev = abbrevs[hash_number]; - - while (abbrev) - { - if (abbrev->number == number) - return abbrev; - else - abbrev = abbrev->next; - } - - return NULL; -} - -/* In DWARF version 2, the description of the debugging information is - stored in a separate .debug_abbrev section. Before we read any - dies from a section we read in all abbreviations and install them - in a hash table. */ - -static struct abbrev_info** -read_abbrevs (bfd *abfd, bfd_uint64_t offset, struct dwarf2_debug *stash) -{ - struct abbrev_info **abbrevs; - bfd_byte *abbrev_ptr; - struct abbrev_info *cur_abbrev; - unsigned int abbrev_number, bytes_read, abbrev_name; - unsigned int abbrev_form, hash_number; - bfd_size_type amt; - - if (! stash->dwarf_abbrev_buffer) - { - asection *msec; - - msec = bfd_get_section_by_name (abfd, ".debug_abbrev"); - if (! msec) - { - (*_bfd_error_handler) (_("Dwarf Error: Can't find .debug_abbrev section.")); - bfd_set_error (bfd_error_bad_value); - return 0; - } - - stash->dwarf_abbrev_size = msec->size; - stash->dwarf_abbrev_buffer - = bfd_simple_get_relocated_section_contents (abfd, msec, NULL, - stash->syms); - if (! stash->dwarf_abbrev_buffer) - return 0; - } - - if (offset >= stash->dwarf_abbrev_size) - { - (*_bfd_error_handler) (_("Dwarf Error: Abbrev offset (%lu) greater than or equal to .debug_abbrev size (%lu)."), - (unsigned long) offset, stash->dwarf_abbrev_size); - bfd_set_error (bfd_error_bad_value); - return 0; - } - - amt = sizeof (struct abbrev_info*) * ABBREV_HASH_SIZE; - abbrevs = bfd_zalloc (abfd, amt); - - abbrev_ptr = stash->dwarf_abbrev_buffer + offset; - abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); - abbrev_ptr += bytes_read; - - /* Loop until we reach an abbrev number of 0. */ - while (abbrev_number) - { - amt = sizeof (struct abbrev_info); - cur_abbrev = bfd_zalloc (abfd, amt); - - /* Read in abbrev header. */ - cur_abbrev->number = abbrev_number; - cur_abbrev->tag = (enum dwarf_tag) - read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); - abbrev_ptr += bytes_read; - cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); - abbrev_ptr += 1; - - /* Now read in declarations. */ - abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); - abbrev_ptr += bytes_read; - abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); - abbrev_ptr += bytes_read; - - while (abbrev_name) - { - if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0) - { - struct attr_abbrev *tmp; - - amt = cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK; - amt *= sizeof (struct attr_abbrev); - tmp = bfd_realloc (cur_abbrev->attrs, amt); - if (tmp == NULL) - { - size_t i; - - for (i = 0; i < ABBREV_HASH_SIZE; i++) - { - struct abbrev_info *abbrev = abbrevs[i]; - - while (abbrev) - { - free (abbrev->attrs); - abbrev = abbrev->next; - } - } - return NULL; - } - cur_abbrev->attrs = tmp; - } - - cur_abbrev->attrs[cur_abbrev->num_attrs].name - = (enum dwarf_attribute) abbrev_name; - cur_abbrev->attrs[cur_abbrev->num_attrs++].form - = (enum dwarf_form) abbrev_form; - abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); - abbrev_ptr += bytes_read; - abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); - abbrev_ptr += bytes_read; - } - - hash_number = abbrev_number % ABBREV_HASH_SIZE; - cur_abbrev->next = abbrevs[hash_number]; - abbrevs[hash_number] = cur_abbrev; - - /* Get next abbreviation. - Under Irix6 the abbreviations for a compilation unit are not - always properly terminated with an abbrev number of 0. - Exit loop if we encounter an abbreviation which we have - already read (which means we are about to read the abbreviations - for the next compile unit) or if the end of the abbreviation - table is reached. */ - if ((unsigned int) (abbrev_ptr - stash->dwarf_abbrev_buffer) - >= stash->dwarf_abbrev_size) - break; - abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); - abbrev_ptr += bytes_read; - if (lookup_abbrev (abbrev_number,abbrevs) != NULL) - break; - } - - return abbrevs; -} - -/* Read an attribute value described by an attribute form. */ - -static bfd_byte * -read_attribute_value (struct attribute *attr, - unsigned form, - struct comp_unit *unit, - bfd_byte *info_ptr) -{ - bfd *abfd = unit->abfd; - unsigned int bytes_read; - struct dwarf_block *blk; - bfd_size_type amt; - - attr->form = (enum dwarf_form) form; - - switch (form) - { - case DW_FORM_addr: - /* FIXME: DWARF3 draft says DW_FORM_ref_addr is offset_size. */ - case DW_FORM_ref_addr: - attr->u.val = read_address (unit, info_ptr); - info_ptr += unit->addr_size; - break; - case DW_FORM_block2: - amt = sizeof (struct dwarf_block); - blk = bfd_alloc (abfd, amt); - blk->size = read_2_bytes (abfd, info_ptr); - info_ptr += 2; - blk->data = read_n_bytes (abfd, info_ptr, blk->size); - info_ptr += blk->size; - attr->u.blk = blk; - break; - case DW_FORM_block4: - amt = sizeof (struct dwarf_block); - blk = bfd_alloc (abfd, amt); - blk->size = read_4_bytes (abfd, info_ptr); - info_ptr += 4; - blk->data = read_n_bytes (abfd, info_ptr, blk->size); - info_ptr += blk->size; - attr->u.blk = blk; - break; - case DW_FORM_data2: - attr->u.val = read_2_bytes (abfd, info_ptr); - info_ptr += 2; - break; - case DW_FORM_data4: - attr->u.val = read_4_bytes (abfd, info_ptr); - info_ptr += 4; - break; - case DW_FORM_data8: - attr->u.val = read_8_bytes (abfd, info_ptr); - info_ptr += 8; - break; - case DW_FORM_string: - attr->u.str = read_string (abfd, info_ptr, &bytes_read); - info_ptr += bytes_read; - break; - case DW_FORM_strp: - attr->u.str = read_indirect_string (unit, info_ptr, &bytes_read); - info_ptr += bytes_read; - break; - case DW_FORM_block: - amt = sizeof (struct dwarf_block); - blk = bfd_alloc (abfd, amt); - blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); - info_ptr += bytes_read; - blk->data = read_n_bytes (abfd, info_ptr, blk->size); - info_ptr += blk->size; - attr->u.blk = blk; - break; - case DW_FORM_block1: - amt = sizeof (struct dwarf_block); - blk = bfd_alloc (abfd, amt); - blk->size = read_1_byte (abfd, info_ptr); - info_ptr += 1; - blk->data = read_n_bytes (abfd, info_ptr, blk->size); - info_ptr += blk->size; - attr->u.blk = blk; - break; - case DW_FORM_data1: - attr->u.val = read_1_byte (abfd, info_ptr); - info_ptr += 1; - break; - case DW_FORM_flag: - attr->u.val = read_1_byte (abfd, info_ptr); - info_ptr += 1; - break; - case DW_FORM_sdata: - attr->u.sval = read_signed_leb128 (abfd, info_ptr, &bytes_read); - info_ptr += bytes_read; - break; - case DW_FORM_udata: - attr->u.val = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); - info_ptr += bytes_read; - break; - case DW_FORM_ref1: - attr->u.val = read_1_byte (abfd, info_ptr); - info_ptr += 1; - break; - case DW_FORM_ref2: - attr->u.val = read_2_bytes (abfd, info_ptr); - info_ptr += 2; - break; - case DW_FORM_ref4: - attr->u.val = read_4_bytes (abfd, info_ptr); - info_ptr += 4; - break; - case DW_FORM_ref8: - attr->u.val = read_8_bytes (abfd, info_ptr); - info_ptr += 8; - break; - case DW_FORM_ref_udata: - attr->u.val = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); - info_ptr += bytes_read; - break; - case DW_FORM_indirect: - form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); - info_ptr += bytes_read; - info_ptr = read_attribute_value (attr, form, unit, info_ptr); - break; - default: - (*_bfd_error_handler) (_("Dwarf Error: Invalid or unhandled FORM value: %u."), - form); - bfd_set_error (bfd_error_bad_value); - } - return info_ptr; -} - -/* Read an attribute described by an abbreviated attribute. */ - -static bfd_byte * -read_attribute (struct attribute *attr, - struct attr_abbrev *abbrev, - struct comp_unit *unit, - bfd_byte *info_ptr) -{ - attr->name = abbrev->name; - info_ptr = read_attribute_value (attr, abbrev->form, unit, info_ptr); - return info_ptr; -} - -/* Source line information table routines. */ - -#define FILE_ALLOC_CHUNK 5 -#define DIR_ALLOC_CHUNK 5 - -struct line_info -{ - struct line_info* prev_line; - bfd_vma address; - char *filename; - unsigned int line; - unsigned int column; - int end_sequence; /* End of (sequential) code sequence. */ -}; - -struct fileinfo -{ - char *name; - unsigned int dir; - unsigned int time; - unsigned int size; -}; - -struct line_info_table -{ - bfd* abfd; - unsigned int num_files; - unsigned int num_dirs; - char *comp_dir; - char **dirs; - struct fileinfo* files; - struct line_info* last_line; /* largest VMA */ - struct line_info* lcl_head; /* local head; used in 'add_line_info' */ -}; - -/* Remember some information about each function. If the function is - inlined (DW_TAG_inlined_subroutine) it may have two additional - attributes, DW_AT_call_file and DW_AT_call_line, which specify the - source code location where this function was inlined. */ - -struct funcinfo -{ - struct funcinfo *prev_func; /* Pointer to previous function in list of all functions */ - struct funcinfo *caller_func; /* Pointer to function one scope higher */ - char *caller_file; /* Source location file name where caller_func inlines this func */ - int caller_line; /* Source location line number where caller_func inlines this func */ - char *file; /* Source location file name */ - int line; /* Source location line number */ - int tag; - char *name; - struct arange arange; - asection *sec; /* Where the symbol is defined */ -}; - -struct varinfo -{ - /* Pointer to previous variable in list of all variables */ - struct varinfo *prev_var; - /* Source location file name */ - char *file; - /* Source location line number */ - int line; - int tag; - char *name; - bfd_vma addr; - /* Where the symbol is defined */ - asection *sec; - /* Is this a stack variable? */ - unsigned int stack: 1; -}; - -/* Return TRUE if NEW_LINE should sort after LINE. */ - -static inline bfd_boolean -new_line_sorts_after (struct line_info *new_line, struct line_info *line) -{ - return (new_line->address > line->address - || (new_line->address == line->address - && new_line->end_sequence < line->end_sequence)); -} - - -/* Adds a new entry to the line_info list in the line_info_table, ensuring - that the list is sorted. Note that the line_info list is sorted from - highest to lowest VMA (with possible duplicates); that is, - line_info->prev_line always accesses an equal or smaller VMA. */ - -static void -add_line_info (struct line_info_table *table, - bfd_vma address, - char *filename, - unsigned int line, - unsigned int column, - int end_sequence) -{ - bfd_size_type amt = sizeof (struct line_info); - struct line_info* info = bfd_alloc (table->abfd, amt); - - /* Set member data of 'info'. */ - info->address = address; - info->line = line; - info->column = column; - info->end_sequence = end_sequence; - - if (filename && filename[0]) - { - info->filename = bfd_alloc (table->abfd, strlen (filename) + 1); - if (info->filename) - strcpy (info->filename, filename); - } - else - info->filename = NULL; - - /* Find the correct location for 'info'. Normally we will receive - new line_info data 1) in order and 2) with increasing VMAs. - However some compilers break the rules (cf. decode_line_info) and - so we include some heuristics for quickly finding the correct - location for 'info'. In particular, these heuristics optimize for - the common case in which the VMA sequence that we receive is a - list of locally sorted VMAs such as - p...z a...j (where a < j < p < z) - - Note: table->lcl_head is used to head an *actual* or *possible* - sequence within the list (such as a...j) that is not directly - headed by table->last_line - - Note: we may receive duplicate entries from 'decode_line_info'. */ - - if (!table->last_line - || new_line_sorts_after (info, table->last_line)) - { - /* Normal case: add 'info' to the beginning of the list */ - info->prev_line = table->last_line; - table->last_line = info; - - /* lcl_head: initialize to head a *possible* sequence at the end. */ - if (!table->lcl_head) - table->lcl_head = info; - } - else if (!new_line_sorts_after (info, table->lcl_head) - && (!table->lcl_head->prev_line - || new_line_sorts_after (info, table->lcl_head->prev_line))) - { - /* Abnormal but easy: lcl_head is the head of 'info'. */ - info->prev_line = table->lcl_head->prev_line; - table->lcl_head->prev_line = info; - } - else - { - /* Abnormal and hard: Neither 'last_line' nor 'lcl_head' are valid - heads for 'info'. Reset 'lcl_head'. */ - struct line_info* li2 = table->last_line; /* always non-NULL */ - struct line_info* li1 = li2->prev_line; - - while (li1) - { - if (!new_line_sorts_after (info, li2) - && new_line_sorts_after (info, li1)) - break; - - li2 = li1; /* always non-NULL */ - li1 = li1->prev_line; - } - table->lcl_head = li2; - info->prev_line = table->lcl_head->prev_line; - table->lcl_head->prev_line = info; - } -} - -/* Extract a fully qualified filename from a line info table. - The returned string has been malloc'ed and it is the caller's - responsibility to free it. */ - -static char * -concat_filename (struct line_info_table *table, unsigned int file) -{ - char *filename; - - if (file - 1 >= table->num_files) - { - /* FILE == 0 means unknown. */ - if (file) - (*_bfd_error_handler) - (_("Dwarf Error: mangled line number section (bad file number).")); - return strdup ("<unknown>"); - } - - filename = table->files[file - 1].name; - - if (! IS_ABSOLUTE_PATH (filename)) - { - char *dirname = (table->files[file - 1].dir - ? table->dirs[table->files[file - 1].dir - 1] - : table->comp_dir); - - /* Not all tools set DW_AT_comp_dir, so dirname may be unknown. - The best we can do is return the filename part. */ - if (dirname != NULL) - { - unsigned int len = strlen (dirname) + strlen (filename) + 2; - char * name; - - name = bfd_malloc (len); - if (name) - sprintf (name, "%s/%s", dirname, filename); - return name; - } - } - - return strdup (filename); -} - -static void -arange_add (bfd *abfd, struct arange *first_arange, bfd_vma low_pc, bfd_vma high_pc) -{ - struct arange *arange; - - /* If the first arange is empty, use it. */ - if (first_arange->high == 0) - { - first_arange->low = low_pc; - first_arange->high = high_pc; - return; - } - - /* Next see if we can cheaply extend an existing range. */ - arange = first_arange; - do - { - if (low_pc == arange->high) - { - arange->high = high_pc; - return; - } - if (high_pc == arange->low) - { - arange->low = low_pc; - return; - } - arange = arange->next; - } - while (arange); - - /* Need to allocate a new arange and insert it into the arange list. - Order isn't significant, so just insert after the first arange. */ - arange = bfd_zalloc (abfd, sizeof (*arange)); - arange->low = low_pc; - arange->high = high_pc; - arange->next = first_arange->next; - first_arange->next = arange; -} - -/* Decode the line number information for UNIT. */ - -static struct line_info_table* -decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) -{ - bfd *abfd = unit->abfd; - struct line_info_table* table; - bfd_byte *line_ptr; - bfd_byte *line_end; - struct line_head lh; - unsigned int i, bytes_read, offset_size; - char *cur_file, *cur_dir; - unsigned char op_code, extended_op, adj_opcode; - bfd_size_type amt; - - if (! stash->dwarf_line_buffer) - { - asection *msec; - - msec = bfd_get_section_by_name (abfd, ".debug_line"); - if (! msec) - { - (*_bfd_error_handler) (_("Dwarf Error: Can't find .debug_line section.")); - bfd_set_error (bfd_error_bad_value); - return 0; - } - - stash->dwarf_line_size = msec->size; - stash->dwarf_line_buffer - = bfd_simple_get_relocated_section_contents (abfd, msec, NULL, - stash->syms); - if (! stash->dwarf_line_buffer) - return 0; - } - - /* It is possible to get a bad value for the line_offset. Validate - it here so that we won't get a segfault below. */ - if (unit->line_offset >= stash->dwarf_line_size) - { - (*_bfd_error_handler) (_("Dwarf Error: Line offset (%lu) greater than or equal to .debug_line size (%lu)."), - unit->line_offset, stash->dwarf_line_size); - bfd_set_error (bfd_error_bad_value); - return 0; - } - - amt = sizeof (struct line_info_table); - table = bfd_alloc (abfd, amt); - table->abfd = abfd; - table->comp_dir = unit->comp_dir; - - table->num_files = 0; - table->files = NULL; - - table->num_dirs = 0; - table->dirs = NULL; - - table->files = NULL; - table->last_line = NULL; - table->lcl_head = NULL; - - line_ptr = stash->dwarf_line_buffer + unit->line_offset; - - /* Read in the prologue. */ - lh.total_length = read_4_bytes (abfd, line_ptr); - line_ptr += 4; - offset_size = 4; - if (lh.total_length == 0xffffffff) - { - lh.total_length = read_8_bytes (abfd, line_ptr); - line_ptr += 8; - offset_size = 8; - } - else if (lh.total_length == 0 && unit->addr_size == 8) - { - /* Handle (non-standard) 64-bit DWARF2 formats. */ - lh.total_length = read_4_bytes (abfd, line_ptr); - line_ptr += 4; - offset_size = 8; - } - line_end = line_ptr + lh.total_length; - lh.version = read_2_bytes (abfd, line_ptr); - line_ptr += 2; - if (offset_size == 4) - lh.prologue_length = read_4_bytes (abfd, line_ptr); - else - lh.prologue_length = read_8_bytes (abfd, line_ptr); - line_ptr += offset_size; - lh.minimum_instruction_length = read_1_byte (abfd, line_ptr); - line_ptr += 1; - lh.default_is_stmt = read_1_byte (abfd, line_ptr); - line_ptr += 1; - lh.line_base = read_1_signed_byte (abfd, line_ptr); - line_ptr += 1; - lh.line_range = read_1_byte (abfd, line_ptr); - line_ptr += 1; - lh.opcode_base = read_1_byte (abfd, line_ptr); - line_ptr += 1; - amt = lh.opcode_base * sizeof (unsigned char); - lh.standard_opcode_lengths = bfd_alloc (abfd, amt); - - lh.standard_opcode_lengths[0] = 1; - - for (i = 1; i < lh.opcode_base; ++i) - { - lh.standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); - line_ptr += 1; - } - - /* Read directory table. */ - while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL) - { - line_ptr += bytes_read; - - if ((table->num_dirs % DIR_ALLOC_CHUNK) == 0) - { - char **tmp; - - amt = table->num_dirs + DIR_ALLOC_CHUNK; - amt *= sizeof (char *); - - tmp = bfd_realloc (table->dirs, amt); - if (tmp == NULL) - { - free (table->dirs); - return NULL; - } - table->dirs = tmp; - } - - table->dirs[table->num_dirs++] = cur_dir; - } - - line_ptr += bytes_read; - - /* Read file name table. */ - while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL) - { - line_ptr += bytes_read; - - if ((table->num_files % FILE_ALLOC_CHUNK) == 0) - { - struct fileinfo *tmp; - - amt = table->num_files + FILE_ALLOC_CHUNK; - amt *= sizeof (struct fileinfo); - - tmp = bfd_realloc (table->files, amt); - if (tmp == NULL) - { - free (table->files); - free (table->dirs); - return NULL; - } - table->files = tmp; - } - - table->files[table->num_files].name = cur_file; - table->files[table->num_files].dir = - read_unsigned_leb128 (abfd, line_ptr, &bytes_read); - line_ptr += bytes_read; - table->files[table->num_files].time = - read_unsigned_leb128 (abfd, line_ptr, &bytes_read); - line_ptr += bytes_read; - table->files[table->num_files].size = - read_unsigned_leb128 (abfd, line_ptr, &bytes_read); - line_ptr += bytes_read; - table->num_files++; - } - - line_ptr += bytes_read; - - /* Read the statement sequences until there's nothing left. */ - while (line_ptr < line_end) - { - /* State machine registers. */ - bfd_vma address = 0; - char * filename = table->num_files ? concat_filename (table, 1) : NULL; - unsigned int line = 1; - unsigned int column = 0; - int is_stmt = lh.default_is_stmt; - int basic_block = 0; - int end_sequence = 0; - /* eraxxon@alumni.rice.edu: Against the DWARF2 specs, some - compilers generate address sequences that are wildly out of - order using DW_LNE_set_address (e.g. Intel C++ 6.0 compiler - for ia64-Linux). Thus, to determine the low and high - address, we must compare on every DW_LNS_copy, etc. */ - bfd_vma low_pc = (bfd_vma) -1; - bfd_vma high_pc = 0; - - /* Decode the table. */ - while (! end_sequence) - { - op_code = read_1_byte (abfd, line_ptr); - line_ptr += 1; - - if (op_code >= lh.opcode_base) - { - /* Special operand. */ - adj_opcode = op_code - lh.opcode_base; - address += (adj_opcode / lh.line_range) - * lh.minimum_instruction_length; - line += lh.line_base + (adj_opcode % lh.line_range); - /* Append row to matrix using current values. */ - add_line_info (table, address, filename, line, column, 0); - basic_block = 1; - if (address < low_pc) - low_pc = address; - if (address > high_pc) - high_pc = address; - } - else switch (op_code) - { - case DW_LNS_extended_op: - /* Ignore length. */ - line_ptr += 1; - extended_op = read_1_byte (abfd, line_ptr); - line_ptr += 1; - - switch (extended_op) - { - case DW_LNE_end_sequence: - end_sequence = 1; - add_line_info (table, address, filename, line, column, - end_sequence); - if (address < low_pc) - low_pc = address; - if (address > high_pc) - high_pc = address; - arange_add (unit->abfd, &unit->arange, low_pc, high_pc); - break; - case DW_LNE_set_address: - address = read_address (unit, line_ptr); - line_ptr += unit->addr_size; - break; - case DW_LNE_define_file: - cur_file = read_string (abfd, line_ptr, &bytes_read); - line_ptr += bytes_read; - if ((table->num_files % FILE_ALLOC_CHUNK) == 0) - { - struct fileinfo *tmp; - - amt = table->num_files + FILE_ALLOC_CHUNK; - amt *= sizeof (struct fileinfo); - tmp = bfd_realloc (table->files, amt); - if (tmp == NULL) - { - free (table->files); - free (table->dirs); - free (filename); - return NULL; - } - table->files = tmp; - } - table->files[table->num_files].name = cur_file; - table->files[table->num_files].dir = - read_unsigned_leb128 (abfd, line_ptr, &bytes_read); - line_ptr += bytes_read; - table->files[table->num_files].time = - read_unsigned_leb128 (abfd, line_ptr, &bytes_read); - line_ptr += bytes_read; - table->files[table->num_files].size = - read_unsigned_leb128 (abfd, line_ptr, &bytes_read); - line_ptr += bytes_read; - table->num_files++; - break; - default: - (*_bfd_error_handler) (_("Dwarf Error: mangled line number section.")); - bfd_set_error (bfd_error_bad_value); - free (filename); - free (table->files); - free (table->dirs); - return NULL; - } - break; - case DW_LNS_copy: - add_line_info (table, address, filename, line, column, 0); - basic_block = 0; - if (address < low_pc) - low_pc = address; - if (address > high_pc) - high_pc = address; - break; - case DW_LNS_advance_pc: - address += lh.minimum_instruction_length - * read_unsigned_leb128 (abfd, line_ptr, &bytes_read); - line_ptr += bytes_read; - break; - case DW_LNS_advance_line: - line += read_signed_leb128 (abfd, line_ptr, &bytes_read); - line_ptr += bytes_read; - break; - case DW_LNS_set_file: - { - unsigned int file; - - /* The file and directory tables are 0 - based, the references are 1 based. */ - file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); - line_ptr += bytes_read; - if (filename) - free (filename); - filename = concat_filename (table, file); - break; - } - case DW_LNS_set_column: - column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); - line_ptr += bytes_read; - break; - case DW_LNS_negate_stmt: - is_stmt = (!is_stmt); - break; - case DW_LNS_set_basic_block: - basic_block = 1; - break; - case DW_LNS_const_add_pc: - address += lh.minimum_instruction_length - * ((255 - lh.opcode_base) / lh.line_range); - break; - case DW_LNS_fixed_advance_pc: - address += read_2_bytes (abfd, line_ptr); - line_ptr += 2; - break; - default: - { - int i; - - /* Unknown standard opcode, ignore it. */ - for (i = 0; i < lh.standard_opcode_lengths[op_code]; i++) - { - (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); - line_ptr += bytes_read; - } - } - } - } - - if (filename) - free (filename); - } - - return table; -} - -/* If ADDR is within TABLE set the output parameters and return TRUE, - otherwise return FALSE. The output parameters, FILENAME_PTR and - LINENUMBER_PTR, are pointers to the objects to be filled in. */ - -static bfd_boolean -lookup_address_in_line_info_table (struct line_info_table *table, - bfd_vma addr, - struct funcinfo *function, - const char **filename_ptr, - unsigned int *linenumber_ptr) -{ - /* Note: table->last_line should be a descendingly sorted list. */ - struct line_info* next_line = table->last_line; - struct line_info* each_line = NULL; - *filename_ptr = NULL; - - if (!next_line) - return FALSE; - - each_line = next_line->prev_line; - - /* Check for large addresses */ - if (addr > next_line->address) - each_line = NULL; /* ensure we skip over the normal case */ - - /* Normal case: search the list; save */ - while (each_line && next_line) - { - /* If we have an address match, save this info. This allows us - to return as good as results as possible for strange debugging - info. */ - bfd_boolean addr_match = FALSE; - if (each_line->address <= addr && addr < next_line->address) - { - addr_match = TRUE; - - /* If this line appears to span functions, and addr is in the - later function, return the first line of that function instead - of the last line of the earlier one. This check is for GCC - 2.95, which emits the first line number for a function late. */ - - if (function != NULL) - { - bfd_vma lowest_pc; - struct arange *arange; - - /* Find the lowest address in the function's range list */ - lowest_pc = function->arange.low; - for (arange = &function->arange; - arange; - arange = arange->next) - { - if (function->arange.low < lowest_pc) - lowest_pc = function->arange.low; - } - /* Check for spanning function and set outgoing line info */ - if (addr >= lowest_pc - && each_line->address < lowest_pc - && next_line->address > lowest_pc) - { - *filename_ptr = next_line->filename; - *linenumber_ptr = next_line->line; - } - else - { - *filename_ptr = each_line->filename; - *linenumber_ptr = each_line->line; - } - } - else - { - *filename_ptr = each_line->filename; - *linenumber_ptr = each_line->line; - } - } - - if (addr_match && !each_line->end_sequence) - return TRUE; /* we have definitely found what we want */ - - next_line = each_line; - each_line = each_line->prev_line; - } - - /* At this point each_line is NULL but next_line is not. If we found - a candidate end-of-sequence point in the loop above, we can return - that (compatibility with a bug in the Intel compiler); otherwise, - assuming that we found the containing function for this address in - this compilation unit, return the first line we have a number for - (compatibility with GCC 2.95). */ - if (*filename_ptr == NULL && function != NULL) - { - *filename_ptr = next_line->filename; - *linenumber_ptr = next_line->line; - return TRUE; - } - - return FALSE; -} - -/* Read in the .debug_ranges section for future reference */ - -static bfd_boolean -read_debug_ranges (struct comp_unit *unit) -{ - struct dwarf2_debug *stash = unit->stash; - if (! stash->dwarf_ranges_buffer) - { - bfd *abfd = unit->abfd; - asection *msec; - - msec = bfd_get_section_by_name (abfd, ".debug_ranges"); - if (! msec) - { - (*_bfd_error_handler) (_("Dwarf Error: Can't find .debug_ranges section.")); - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - - stash->dwarf_ranges_size = msec->size; - stash->dwarf_ranges_buffer - = bfd_simple_get_relocated_section_contents (abfd, msec, NULL, - stash->syms); - if (! stash->dwarf_ranges_buffer) - return FALSE; - } - return TRUE; -} - -/* Function table functions. */ - -/* If ADDR is within TABLE, set FUNCTIONNAME_PTR, and return TRUE. - Note that we need to find the function that has the smallest - range that contains ADDR, to handle inlined functions without - depending upon them being ordered in TABLE by increasing range. */ - -static bfd_boolean -lookup_address_in_function_table (struct comp_unit *unit, - bfd_vma addr, - struct funcinfo **function_ptr, - const char **functionname_ptr) -{ - struct funcinfo* each_func; - struct funcinfo* best_fit = NULL; - struct arange *arange; - - for (each_func = unit->function_table; - each_func; - each_func = each_func->prev_func) - { - for (arange = &each_func->arange; - arange; - arange = arange->next) - { - if (addr >= arange->low && addr < arange->high) - { - if (!best_fit || - ((arange->high - arange->low) < (best_fit->arange.high - best_fit->arange.low))) - best_fit = each_func; - } - } - } - - if (best_fit) - { - *functionname_ptr = best_fit->name; - *function_ptr = best_fit; - return TRUE; - } - else - { - return FALSE; - } -} - -/* If SYM at ADDR is within function table of UNIT, set FILENAME_PTR - and LINENUMBER_PTR, and return TRUE. */ - -static bfd_boolean -lookup_symbol_in_function_table (struct comp_unit *unit, - asymbol *sym, - bfd_vma addr, - const char **filename_ptr, - unsigned int *linenumber_ptr) -{ - struct funcinfo* each_func; - struct funcinfo* best_fit = NULL; - struct arange *arange; - const char *name = bfd_asymbol_name (sym); - asection *sec = bfd_get_section (sym); - - for (each_func = unit->function_table; - each_func; - each_func = each_func->prev_func) - { - for (arange = &each_func->arange; - arange; - arange = arange->next) - { - if ((!each_func->sec || each_func->sec == sec) - && addr >= arange->low - && addr < arange->high - && each_func->name - && strcmp (name, each_func->name) == 0 - && (!best_fit - || ((arange->high - arange->low) - < (best_fit->arange.high - best_fit->arange.low)))) - best_fit = each_func; - } - } - - if (best_fit) - { - best_fit->sec = sec; - *filename_ptr = best_fit->file; - *linenumber_ptr = best_fit->line; - return TRUE; - } - else - return FALSE; -} - -/* Variable table functions. */ - -/* If SYM is within variable table of UNIT, set FILENAME_PTR and - LINENUMBER_PTR, and return TRUE. */ - -static bfd_boolean -lookup_symbol_in_variable_table (struct comp_unit *unit, - asymbol *sym, - bfd_vma addr, - const char **filename_ptr, - unsigned int *linenumber_ptr) -{ - const char *name = bfd_asymbol_name (sym); - asection *sec = bfd_get_section (sym); - struct varinfo* each; - - for (each = unit->variable_table; each; each = each->prev_var) - if (each->stack == 0 - && each->file != NULL - && each->name != NULL - && each->addr == addr - && (!each->sec || each->sec == sec) - && strcmp (name, each->name) == 0) - break; - - if (each) - { - each->sec = sec; - *filename_ptr = each->file; - *linenumber_ptr = each->line; - return TRUE; - } - else - return FALSE; -} - -static char * -find_abstract_instance_name (struct comp_unit *unit, bfd_uint64_t die_ref) -{ - bfd *abfd = unit->abfd; - bfd_byte *info_ptr; - unsigned int abbrev_number, bytes_read, i; - struct abbrev_info *abbrev; - struct attribute attr; - char *name = 0; - - info_ptr = unit->info_ptr_unit + die_ref; - abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); - info_ptr += bytes_read; - - if (abbrev_number) - { - abbrev = lookup_abbrev (abbrev_number, unit->abbrevs); - if (! abbrev) - { - (*_bfd_error_handler) (_("Dwarf Error: Could not find abbrev number %u."), - abbrev_number); - bfd_set_error (bfd_error_bad_value); - } - else - { - for (i = 0; i < abbrev->num_attrs; ++i) - { - info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr); - switch (attr.name) - { - case DW_AT_name: - /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */ - if (name == NULL) - name = attr.u.str; - break; - case DW_AT_specification: - name = find_abstract_instance_name (unit, attr.u.val); - break; - case DW_AT_MIPS_linkage_name: - name = attr.u.str; - break; - default: - break; - } - } - } - } - return (name); -} - -static void -read_rangelist (struct comp_unit *unit, struct arange *arange, bfd_uint64_t offset) -{ - bfd_byte *ranges_ptr; - bfd_vma base_address = unit->base_address; - - if (! unit->stash->dwarf_ranges_buffer) - { - if (! read_debug_ranges (unit)) - return; - } - ranges_ptr = unit->stash->dwarf_ranges_buffer + offset; - - for (;;) - { - bfd_vma low_pc; - bfd_vma high_pc; - - if (unit->addr_size == 4) - { - low_pc = read_4_bytes (unit->abfd, ranges_ptr); - ranges_ptr += 4; - high_pc = read_4_bytes (unit->abfd, ranges_ptr); - ranges_ptr += 4; - } - else - { - low_pc = read_8_bytes (unit->abfd, ranges_ptr); - ranges_ptr += 8; - high_pc = read_8_bytes (unit->abfd, ranges_ptr); - ranges_ptr += 8; - } - if (low_pc == 0 && high_pc == 0) - break; - if (low_pc == -1UL && high_pc != -1UL) - base_address = high_pc; - else - arange_add (unit->abfd, arange, base_address + low_pc, base_address + high_pc); - } -} - -/* DWARF2 Compilation unit functions. */ - -/* Scan over each die in a comp. unit looking for functions to add - to the function table and variables to the variable table. */ - -static bfd_boolean -scan_unit_for_symbols (struct comp_unit *unit) -{ - bfd *abfd = unit->abfd; - bfd_byte *info_ptr = unit->first_child_die_ptr; - int nesting_level = 1; - struct funcinfo **nested_funcs; - int nested_funcs_size; - - /* Maintain a stack of in-scope functions and inlined functions, which we - can use to set the caller_func field. */ - nested_funcs_size = 32; - nested_funcs = bfd_malloc (nested_funcs_size * sizeof (struct funcinfo *)); - if (nested_funcs == NULL) - return FALSE; - nested_funcs[nesting_level] = 0; - - while (nesting_level) - { - unsigned int abbrev_number, bytes_read, i; - struct abbrev_info *abbrev; - struct attribute attr; - struct funcinfo *func; - struct varinfo *var; - bfd_vma low_pc = 0; - bfd_vma high_pc = 0; - - abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); - info_ptr += bytes_read; - - if (! abbrev_number) - { - nesting_level--; - continue; - } - - abbrev = lookup_abbrev (abbrev_number,unit->abbrevs); - if (! abbrev) - { - (*_bfd_error_handler) (_("Dwarf Error: Could not find abbrev number %u."), - abbrev_number); - bfd_set_error (bfd_error_bad_value); - free (nested_funcs); - return FALSE; - } - - var = NULL; - if (abbrev->tag == DW_TAG_subprogram - || abbrev->tag == DW_TAG_entry_point - || abbrev->tag == DW_TAG_inlined_subroutine) - { - bfd_size_type amt = sizeof (struct funcinfo); - func = bfd_zalloc (abfd, amt); - func->tag = abbrev->tag; - func->prev_func = unit->function_table; - unit->function_table = func; - - if (func->tag == DW_TAG_inlined_subroutine) - for (i = nesting_level - 1; i >= 1; i--) - if (nested_funcs[i]) - { - func->caller_func = nested_funcs[i]; - break; - } - nested_funcs[nesting_level] = func; - } - else - { - func = NULL; - if (abbrev->tag == DW_TAG_variable) - { - bfd_size_type amt = sizeof (struct varinfo); - var = bfd_zalloc (abfd, amt); - var->tag = abbrev->tag; - var->stack = 1; - var->prev_var = unit->variable_table; - unit->variable_table = var; - } - - /* No inline function in scope at this nesting level. */ - nested_funcs[nesting_level] = 0; - } - - for (i = 0; i < abbrev->num_attrs; ++i) - { - info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr); - - if (func) - { - switch (attr.name) - { - case DW_AT_call_file: - func->caller_file = concat_filename (unit->line_table, attr.u.val); - break; - - case DW_AT_call_line: - func->caller_line = attr.u.val; - break; - - case DW_AT_abstract_origin: - func->name = find_abstract_instance_name (unit, attr.u.val); - break; - - case DW_AT_name: - /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */ - if (func->name == NULL) - func->name = attr.u.str; - break; - - case DW_AT_MIPS_linkage_name: - func->name = attr.u.str; - break; - - case DW_AT_low_pc: - low_pc = attr.u.val; - break; - - case DW_AT_high_pc: - high_pc = attr.u.val; - break; - - case DW_AT_ranges: - read_rangelist (unit, &func->arange, attr.u.val); - break; - - case DW_AT_decl_file: - func->file = concat_filename (unit->line_table, - attr.u.val); - break; - - case DW_AT_decl_line: - func->line = attr.u.val; - break; - - default: - break; - } - } - else if (var) - { - switch (attr.name) - { - case DW_AT_name: - var->name = attr.u.str; - break; - - case DW_AT_decl_file: - var->file = concat_filename (unit->line_table, - attr.u.val); - break; - - case DW_AT_decl_line: - var->line = attr.u.val; - break; - - case DW_AT_external: - if (attr.u.val != 0) - var->stack = 0; - break; - - case DW_AT_location: - switch (attr.form) - { - case DW_FORM_block: - case DW_FORM_block1: - case DW_FORM_block2: - case DW_FORM_block4: - if (*attr.u.blk->data == DW_OP_addr) - { - var->stack = 0; - - /* Verify that DW_OP_addr is the only opcode in the - location, in which case the block size will be 1 - plus the address size. */ - /* ??? For TLS variables, gcc can emit - DW_OP_addr <addr> DW_OP_GNU_push_tls_address - which we don't handle here yet. */ - if (attr.u.blk->size == unit->addr_size + 1U) - var->addr = bfd_get (unit->addr_size * 8, - unit->abfd, - attr.u.blk->data + 1); - } - break; - - default: - break; - } - break; - - default: - break; - } - } - } - - if (func && high_pc != 0) - { - arange_add (unit->abfd, &func->arange, low_pc, high_pc); - } - - if (abbrev->has_children) - { - nesting_level++; - - if (nesting_level >= nested_funcs_size) - { - struct funcinfo **tmp; - - nested_funcs_size *= 2; - tmp = bfd_realloc (nested_funcs, - (nested_funcs_size - * sizeof (struct funcinfo *))); - if (tmp == NULL) - { - free (nested_funcs); - return FALSE; - } - nested_funcs = tmp; - } - nested_funcs[nesting_level] = 0; - } - } - - free (nested_funcs); - return TRUE; -} - -/* Parse a DWARF2 compilation unit starting at INFO_PTR. This - includes the compilation unit header that proceeds the DIE's, but - does not include the length field that precedes each compilation - unit header. END_PTR points one past the end of this comp unit. - OFFSET_SIZE is the size of DWARF2 offsets (either 4 or 8 bytes). - - This routine does not read the whole compilation unit; only enough - to get to the line number information for the compilation unit. */ - -static struct comp_unit * -parse_comp_unit (bfd *abfd, - struct dwarf2_debug *stash, - bfd_vma unit_length, - bfd_byte *info_ptr_unit, - unsigned int offset_size) -{ - struct comp_unit* unit; - unsigned int version; - bfd_uint64_t abbrev_offset = 0; - unsigned int addr_size; - struct abbrev_info** abbrevs; - unsigned int abbrev_number, bytes_read, i; - struct abbrev_info *abbrev; - struct attribute attr; - bfd_byte *info_ptr = stash->info_ptr; - bfd_byte *end_ptr = info_ptr + unit_length; - bfd_size_type amt; - bfd_vma low_pc = 0; - bfd_vma high_pc = 0; - - version = read_2_bytes (abfd, info_ptr); - info_ptr += 2; - BFD_ASSERT (offset_size == 4 || offset_size == 8); - if (offset_size == 4) - abbrev_offset = read_4_bytes (abfd, info_ptr); - else - abbrev_offset = read_8_bytes (abfd, info_ptr); - info_ptr += offset_size; - addr_size = read_1_byte (abfd, info_ptr); - info_ptr += 1; - - if (version != 2) - { - (*_bfd_error_handler) (_("Dwarf Error: found dwarf version '%u', this reader only handles version 2 information."), version); - bfd_set_error (bfd_error_bad_value); - return 0; - } - - if (addr_size > sizeof (bfd_vma)) - { - (*_bfd_error_handler) (_("Dwarf Error: found address size '%u', this reader can not handle sizes greater than '%u'."), - addr_size, - (unsigned int) sizeof (bfd_vma)); - bfd_set_error (bfd_error_bad_value); - return 0; - } - - if (addr_size != 2 && addr_size != 4 && addr_size != 8) - { - (*_bfd_error_handler) ("Dwarf Error: found address size '%u', this reader can only handle address sizes '2', '4' and '8'.", addr_size); - bfd_set_error (bfd_error_bad_value); - return 0; - } - - /* Read the abbrevs for this compilation unit into a table. */ - abbrevs = read_abbrevs (abfd, abbrev_offset, stash); - if (! abbrevs) - return 0; - - abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); - info_ptr += bytes_read; - if (! abbrev_number) - { - (*_bfd_error_handler) (_("Dwarf Error: Bad abbrev number: %u."), - abbrev_number); - bfd_set_error (bfd_error_bad_value); - return 0; - } - - abbrev = lookup_abbrev (abbrev_number, abbrevs); - if (! abbrev) - { - (*_bfd_error_handler) (_("Dwarf Error: Could not find abbrev number %u."), - abbrev_number); - bfd_set_error (bfd_error_bad_value); - return 0; - } - - amt = sizeof (struct comp_unit); - unit = bfd_zalloc (abfd, amt); - unit->abfd = abfd; - unit->addr_size = addr_size; - unit->offset_size = offset_size; - unit->abbrevs = abbrevs; - unit->end_ptr = end_ptr; - unit->stash = stash; - unit->info_ptr_unit = info_ptr_unit; - - for (i = 0; i < abbrev->num_attrs; ++i) - { - info_ptr = read_attribute (&attr, &abbrev->attrs[i], unit, info_ptr); - - /* Store the data if it is of an attribute we want to keep in a - partial symbol table. */ - switch (attr.name) - { - case DW_AT_stmt_list: - unit->stmtlist = 1; - unit->line_offset = attr.u.val; - break; - - case DW_AT_name: - unit->name = attr.u.str; - break; - - case DW_AT_low_pc: - low_pc = attr.u.val; - /* If the compilation unit DIE has a DW_AT_low_pc attribute, - this is the base address to use when reading location - lists or range lists. */ - unit->base_address = low_pc; - break; - - case DW_AT_high_pc: - high_pc = attr.u.val; - break; - - case DW_AT_ranges: - read_rangelist (unit, &unit->arange, attr.u.val); - break; - - case DW_AT_comp_dir: - { - char *comp_dir = attr.u.str; - if (comp_dir) - { - /* Irix 6.2 native cc prepends <machine>.: to the compilation - directory, get rid of it. */ - char *cp = strchr (comp_dir, ':'); - - if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/') - comp_dir = cp + 1; - } - unit->comp_dir = comp_dir; - break; - } - - default: - break; - } - } - if (high_pc != 0) - { - arange_add (unit->abfd, &unit->arange, low_pc, high_pc); - } - - unit->first_child_die_ptr = info_ptr; - return unit; -} - -/* Return TRUE if UNIT may contain the address given by ADDR. When - there are functions written entirely with inline asm statements, the - range info in the compilation unit header may not be correct. We - need to consult the line info table to see if a compilation unit - really contains the given address. */ - -static bfd_boolean -comp_unit_contains_address (struct comp_unit *unit, bfd_vma addr) -{ - struct arange *arange; - - if (unit->error) - return FALSE; - - arange = &unit->arange; - do - { - if (addr >= arange->low && addr < arange->high) - return TRUE; - arange = arange->next; - } - while (arange); - - return FALSE; -} - -/* If UNIT contains ADDR, set the output parameters to the values for - the line containing ADDR. The output parameters, FILENAME_PTR, - FUNCTIONNAME_PTR, and LINENUMBER_PTR, are pointers to the objects - to be filled in. - - Return TRUE if UNIT contains ADDR, and no errors were encountered; - FALSE otherwise. */ - -static bfd_boolean -comp_unit_find_nearest_line (struct comp_unit *unit, - bfd_vma addr, - const char **filename_ptr, - const char **functionname_ptr, - unsigned int *linenumber_ptr, - struct dwarf2_debug *stash) -{ - bfd_boolean line_p; - bfd_boolean func_p; - struct funcinfo *function; - - if (unit->error) - return FALSE; - - if (! unit->line_table) - { - if (! unit->stmtlist) - { - unit->error = 1; - return FALSE; - } - - unit->line_table = decode_line_info (unit, stash); - - if (! unit->line_table) - { - unit->error = 1; - return FALSE; - } - - if (unit->first_child_die_ptr < unit->end_ptr - && ! scan_unit_for_symbols (unit)) - { - unit->error = 1; - return FALSE; - } - } - - function = NULL; - func_p = lookup_address_in_function_table (unit, addr, - &function, functionname_ptr); - if (func_p && (function->tag == DW_TAG_inlined_subroutine)) - stash->inliner_chain = function; - line_p = lookup_address_in_line_info_table (unit->line_table, addr, - function, filename_ptr, - linenumber_ptr); - return line_p || func_p; -} - -/* If UNIT contains SYM at ADDR, set the output parameters to the - values for the line containing SYM. The output parameters, - FILENAME_PTR, and LINENUMBER_PTR, are pointers to the objects to be - filled in. - - Return TRUE if UNIT contains SYM, and no errors were encountered; - FALSE otherwise. */ - -static bfd_boolean -comp_unit_find_line (struct comp_unit *unit, - asymbol *sym, - bfd_vma addr, - const char **filename_ptr, - unsigned int *linenumber_ptr, - struct dwarf2_debug *stash) -{ - if (unit->error) - return FALSE; - - if (! unit->line_table) - { - if (! unit->stmtlist) - { - unit->error = 1; - return FALSE; - } - - unit->line_table = decode_line_info (unit, stash); - - if (! unit->line_table) - { - unit->error = 1; - return FALSE; - } - - if (unit->first_child_die_ptr < unit->end_ptr - && ! scan_unit_for_symbols (unit)) - { - unit->error = 1; - return FALSE; - } - } - - if (sym->flags & BSF_FUNCTION) - return lookup_symbol_in_function_table (unit, sym, addr, - filename_ptr, - linenumber_ptr); - else - return lookup_symbol_in_variable_table (unit, sym, addr, - filename_ptr, - linenumber_ptr); -} - -/* Locate a section in a BFD containing debugging info. The search starts - from the section after AFTER_SEC, or from the first section in the BFD if - AFTER_SEC is NULL. The search works by examining the names of the - sections. There are two permissiable names. The first is .debug_info. - This is the standard DWARF2 name. The second is a prefix .gnu.linkonce.wi. - This is a variation on the .debug_info section which has a checksum - describing the contents appended onto the name. This allows the linker to - identify and discard duplicate debugging sections for different - compilation units. */ -#define DWARF2_DEBUG_INFO ".debug_info" -#define GNU_LINKONCE_INFO ".gnu.linkonce.wi." - -static asection * -find_debug_info (bfd *abfd, asection *after_sec) -{ - asection * msec; - - if (after_sec) - msec = after_sec->next; - else - msec = abfd->sections; - - while (msec) - { - if (strcmp (msec->name, DWARF2_DEBUG_INFO) == 0) - return msec; - - if (strncmp (msec->name, GNU_LINKONCE_INFO, strlen (GNU_LINKONCE_INFO)) == 0) - return msec; - - msec = msec->next; - } - - return NULL; -} - -/* Unset vmas for loadable sections in STASH. */ - -static void -unset_sections (struct dwarf2_debug *stash) -{ - unsigned int i; - struct loadable_section *p; - - i = stash->loadable_section_count; - p = stash->loadable_sections; - for (; i > 0; i--, p++) - p->section->vma = 0; -} - -/* Set unique vmas for loadable sections in ABFD and save vmas in - STASH for unset_sections. */ - -static bfd_boolean -place_sections (bfd *abfd, struct dwarf2_debug *stash) -{ - struct loadable_section *p; - unsigned int i; - - if (stash->loadable_section_count != 0) - { - i = stash->loadable_section_count; - p = stash->loadable_sections; - for (; i > 0; i--, p++) - p->section->vma = p->adj_vma; - } - else - { - asection *sect; - bfd_vma last_vma = 0; - bfd_size_type amt; - struct loadable_section *p; - - i = 0; - for (sect = abfd->sections; sect != NULL; sect = sect->next) - { - bfd_size_type sz; - - if (sect->vma != 0 || (sect->flags & SEC_LOAD) == 0) - continue; - - sz = sect->rawsize ? sect->rawsize : sect->size; - if (sz == 0) - continue; - - i++; - } - - amt = i * sizeof (struct loadable_section); - p = (struct loadable_section *) bfd_zalloc (abfd, amt); - if (! p) - return FALSE; - - stash->loadable_sections = p; - stash->loadable_section_count = i; - - for (sect = abfd->sections; sect != NULL; sect = sect->next) - { - bfd_size_type sz; - - if (sect->vma != 0 || (sect->flags & SEC_LOAD) == 0) - continue; - - sz = sect->rawsize ? sect->rawsize : sect->size; - if (sz == 0) - continue; - - p->section = sect; - if (last_vma != 0) - { - /* Align the new address to the current section - alignment. */ - last_vma = ((last_vma - + ~((bfd_vma) -1 << sect->alignment_power)) - & ((bfd_vma) -1 << sect->alignment_power)); - sect->vma = last_vma; - } - p->adj_vma = sect->vma; - last_vma += sect->vma + sz; - - p++; - } - } - - return TRUE; -} - -/* The DWARF2 version of find_nearest_line. Return TRUE if the line - is found without error. ADDR_SIZE is the number of bytes in the - initial .debug_info length field and in the abbreviation offset. - You may use zero to indicate that the default value should be - used. */ - -bfd_boolean -_bfd_dwarf2_find_nearest_line (bfd *abfd, - asection *section, - asymbol **symbols, - bfd_vma offset, - const char **filename_ptr, - const char **functionname_ptr, - unsigned int *linenumber_ptr, - unsigned int addr_size, - void **pinfo) -{ - /* Read each compilation unit from the section .debug_info, and check - to see if it contains the address we are searching for. If yes, - lookup the address, and return the line number info. If no, go - on to the next compilation unit. - - We keep a list of all the previously read compilation units, and - a pointer to the next un-read compilation unit. Check the - previously read units before reading more. */ - struct dwarf2_debug *stash; - - /* What address are we looking for? */ - bfd_vma addr; - - struct comp_unit* each; - - bfd_vma found = FALSE; - - stash = *pinfo; - - if (! stash) - { - bfd_size_type amt = sizeof (struct dwarf2_debug); - - stash = bfd_zalloc (abfd, amt); - if (! stash) - return FALSE; - } - - /* In a relocatable file, 2 functions may have the same address. - We change the section vma so that they won't overlap. */ - if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) - { - if (! place_sections (abfd, stash)) - return FALSE; - } - - addr = offset; - if (section->output_section) - addr += section->output_section->vma + section->output_offset; - else - addr += section->vma; - *filename_ptr = NULL; - *functionname_ptr = NULL; - *linenumber_ptr = 0; - - /* The DWARF2 spec says that the initial length field, and the - offset of the abbreviation table, should both be 4-byte values. - However, some compilers do things differently. */ - if (addr_size == 0) - addr_size = 4; - BFD_ASSERT (addr_size == 4 || addr_size == 8); - - if (! *pinfo) - { - bfd_size_type total_size; - asection *msec; - - *pinfo = stash; - - msec = find_debug_info (abfd, NULL); - if (! msec) - /* No dwarf2 info. Note that at this point the stash - has been allocated, but contains zeros, this lets - future calls to this function fail quicker. */ - goto done; - - /* There can be more than one DWARF2 info section in a BFD these days. - Read them all in and produce one large stash. We do this in two - passes - in the first pass we just accumulate the section sizes. - In the second pass we read in the section's contents. The allows - us to avoid reallocing the data as we add sections to the stash. */ - for (total_size = 0; msec; msec = find_debug_info (abfd, msec)) - total_size += msec->size; - - stash->info_ptr = bfd_alloc (abfd, total_size); - if (stash->info_ptr == NULL) - goto done; - - stash->info_ptr_end = stash->info_ptr; - - for (msec = find_debug_info (abfd, NULL); - msec; - msec = find_debug_info (abfd, msec)) - { - bfd_size_type size; - bfd_size_type start; - - size = msec->size; - if (size == 0) - continue; - - start = stash->info_ptr_end - stash->info_ptr; - - if ((bfd_simple_get_relocated_section_contents - (abfd, msec, stash->info_ptr + start, symbols)) == NULL) - continue; - - stash->info_ptr_end = stash->info_ptr + start + size; - } - - BFD_ASSERT (stash->info_ptr_end == stash->info_ptr + total_size); - - stash->sec = find_debug_info (abfd, NULL); - stash->sec_info_ptr = stash->info_ptr; - stash->syms = symbols; - } - - /* A null info_ptr indicates that there is no dwarf2 info - (or that an error occured while setting up the stash). */ - if (! stash->info_ptr) - goto done; - - stash->inliner_chain = NULL; - - /* Check the previously read comp. units first. */ - for (each = stash->all_comp_units; each; each = each->next_unit) - if (comp_unit_contains_address (each, addr) - && comp_unit_find_nearest_line (each, addr, filename_ptr, - functionname_ptr, - linenumber_ptr, stash)) - { - found = TRUE; - goto done; - } - - /* Read each remaining comp. units checking each as they are read. */ - while (stash->info_ptr < stash->info_ptr_end) - { - bfd_vma length; - unsigned int offset_size = addr_size; - bfd_byte *info_ptr_unit = stash->info_ptr; - - length = read_4_bytes (abfd, stash->info_ptr); - /* A 0xffffff length is the DWARF3 way of indicating we use - 64-bit offsets, instead of 32-bit offsets. */ - if (length == 0xffffffff) - { - offset_size = 8; - length = read_8_bytes (abfd, stash->info_ptr + 4); - stash->info_ptr += 12; - } - /* A zero length is the IRIX way of indicating 64-bit offsets, - mostly because the 64-bit length will generally fit in 32 - bits, and the endianness helps. */ - else if (length == 0) - { - offset_size = 8; - length = read_4_bytes (abfd, stash->info_ptr + 4); - stash->info_ptr += 8; - } - /* In the absence of the hints above, we assume addr_size-sized - offsets, for backward-compatibility with pre-DWARF3 64-bit - platforms. */ - else if (addr_size == 8) - { - length = read_8_bytes (abfd, stash->info_ptr); - stash->info_ptr += 8; - } - else - stash->info_ptr += 4; - - if (length > 0) - { - each = parse_comp_unit (abfd, stash, length, info_ptr_unit, - offset_size); - stash->info_ptr += length; - - if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr) - == stash->sec->size) - { - stash->sec = find_debug_info (abfd, stash->sec); - stash->sec_info_ptr = stash->info_ptr; - } - - if (each) - { - each->next_unit = stash->all_comp_units; - stash->all_comp_units = each; - - /* DW_AT_low_pc and DW_AT_high_pc are optional for - compilation units. If we don't have them (i.e., - unit->high == 0), we need to consult the line info - table to see if a compilation unit contains the given - address. */ - if ((each->arange.high == 0 - || comp_unit_contains_address (each, addr)) - && comp_unit_find_nearest_line (each, addr, - filename_ptr, - functionname_ptr, - linenumber_ptr, - stash)) - { - found = TRUE; - goto done; - } - } - } - } - -done: - if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) - unset_sections (stash); - - return found; -} - -/* The DWARF2 version of find_line. Return TRUE if the line is found - without error. */ - -bfd_boolean -_bfd_dwarf2_find_line (bfd *abfd, - asymbol **symbols, - asymbol *symbol, - const char **filename_ptr, - unsigned int *linenumber_ptr, - unsigned int addr_size, - void **pinfo) -{ - /* Read each compilation unit from the section .debug_info, and check - to see if it contains the address we are searching for. If yes, - lookup the address, and return the line number info. If no, go - on to the next compilation unit. - - We keep a list of all the previously read compilation units, and - a pointer to the next un-read compilation unit. Check the - previously read units before reading more. */ - struct dwarf2_debug *stash; - - /* What address are we looking for? */ - bfd_vma addr; - - struct comp_unit* each; - - asection *section; - - bfd_boolean found = FALSE; - - section = bfd_get_section (symbol); - - stash = *pinfo; - - if (! stash) - { - bfd_size_type amt = sizeof (struct dwarf2_debug); - - stash = bfd_zalloc (abfd, amt); - if (! stash) - return FALSE; - } - - /* In a relocatable file, 2 functions may have the same address. - We change the section vma so that they won't overlap. */ - if (!stash && (abfd->flags & (EXEC_P | DYNAMIC)) == 0) - { - if (! place_sections (abfd, stash)) - return FALSE; - } - - addr = symbol->value; - if (section->output_section) - addr += section->output_section->vma + section->output_offset; - else - addr += section->vma; - - *filename_ptr = NULL; - *filename_ptr = NULL; - *linenumber_ptr = 0; - - if (! *pinfo) - { - bfd_size_type total_size; - asection *msec; - - *pinfo = stash; - - msec = find_debug_info (abfd, NULL); - if (! msec) - /* No dwarf2 info. Note that at this point the stash - has been allocated, but contains zeros, this lets - future calls to this function fail quicker. */ - goto done; - - /* There can be more than one DWARF2 info section in a BFD these days. - Read them all in and produce one large stash. We do this in two - passes - in the first pass we just accumulate the section sizes. - In the second pass we read in the section's contents. The allows - us to avoid reallocing the data as we add sections to the stash. */ - for (total_size = 0; msec; msec = find_debug_info (abfd, msec)) - total_size += msec->size; - - stash->info_ptr = bfd_alloc (abfd, total_size); - if (stash->info_ptr == NULL) - goto done; - - stash->info_ptr_end = stash->info_ptr; - - for (msec = find_debug_info (abfd, NULL); - msec; - msec = find_debug_info (abfd, msec)) - { - bfd_size_type size; - bfd_size_type start; - - size = msec->size; - if (size == 0) - continue; - - start = stash->info_ptr_end - stash->info_ptr; - - if ((bfd_simple_get_relocated_section_contents - (abfd, msec, stash->info_ptr + start, symbols)) == NULL) - continue; - - stash->info_ptr_end = stash->info_ptr + start + size; - } - - BFD_ASSERT (stash->info_ptr_end == stash->info_ptr + total_size); - - stash->sec = find_debug_info (abfd, NULL); - stash->sec_info_ptr = stash->info_ptr; - stash->syms = symbols; - } - - /* A null info_ptr indicates that there is no dwarf2 info - (or that an error occured while setting up the stash). */ - if (! stash->info_ptr) - goto done; - - stash->inliner_chain = NULL; - - /* Check the previously read comp. units first. */ - for (each = stash->all_comp_units; each; each = each->next_unit) - if ((symbol->flags & BSF_FUNCTION) == 0 - || comp_unit_contains_address (each, addr)) - { - found = comp_unit_find_line (each, symbol, addr, filename_ptr, - linenumber_ptr, stash); - if (found) - goto done; - } - - /* The DWARF2 spec says that the initial length field, and the - offset of the abbreviation table, should both be 4-byte values. - However, some compilers do things differently. */ - if (addr_size == 0) - addr_size = 4; - BFD_ASSERT (addr_size == 4 || addr_size == 8); - - /* Read each remaining comp. units checking each as they are read. */ - while (stash->info_ptr < stash->info_ptr_end) - { - bfd_vma length; - unsigned int offset_size = addr_size; - bfd_byte *info_ptr_unit = stash->info_ptr; - - length = read_4_bytes (abfd, stash->info_ptr); - /* A 0xffffff length is the DWARF3 way of indicating we use - 64-bit offsets, instead of 32-bit offsets. */ - if (length == 0xffffffff) - { - offset_size = 8; - length = read_8_bytes (abfd, stash->info_ptr + 4); - stash->info_ptr += 12; - } - /* A zero length is the IRIX way of indicating 64-bit offsets, - mostly because the 64-bit length will generally fit in 32 - bits, and the endianness helps. */ - else if (length == 0) - { - offset_size = 8; - length = read_4_bytes (abfd, stash->info_ptr + 4); - stash->info_ptr += 8; - } - /* In the absence of the hints above, we assume addr_size-sized - offsets, for backward-compatibility with pre-DWARF3 64-bit - platforms. */ - else if (addr_size == 8) - { - length = read_8_bytes (abfd, stash->info_ptr); - stash->info_ptr += 8; - } - else - stash->info_ptr += 4; - - if (length > 0) - { - each = parse_comp_unit (abfd, stash, length, info_ptr_unit, - offset_size); - stash->info_ptr += length; - - if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr) - == stash->sec->size) - { - stash->sec = find_debug_info (abfd, stash->sec); - stash->sec_info_ptr = stash->info_ptr; - } - - if (each) - { - each->next_unit = stash->all_comp_units; - stash->all_comp_units = each; - - /* DW_AT_low_pc and DW_AT_high_pc are optional for - compilation units. If we don't have them (i.e., - unit->high == 0), we need to consult the line info - table to see if a compilation unit contains the given - address. */ - found = (((symbol->flags & BSF_FUNCTION) == 0 - || each->arange.high <= 0 - || comp_unit_contains_address (each, addr)) - && comp_unit_find_line (each, symbol, addr, - filename_ptr, - linenumber_ptr, - stash)); - if (found) - goto done; - } - } - } - -done: - if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) - unset_sections (stash); - - return found; -} - -bfd_boolean -_bfd_dwarf2_find_inliner_info (bfd *abfd ATTRIBUTE_UNUSED, - const char **filename_ptr, - const char **functionname_ptr, - unsigned int *linenumber_ptr, - void **pinfo) -{ - struct dwarf2_debug *stash; - - stash = *pinfo; - if (stash) - { - struct funcinfo *func = stash->inliner_chain; - if (func && func->caller_func) - { - *filename_ptr = func->caller_file; - *functionname_ptr = func->caller_func->name; - *linenumber_ptr = func->caller_line; - stash->inliner_chain = func->caller_func; - return (TRUE); - } - } - - return (FALSE); -} - -void -_bfd_dwarf2_cleanup_debug_info (bfd *abfd) -{ - struct comp_unit *each; - struct dwarf2_debug *stash; - - if (abfd == NULL || elf_tdata (abfd) == NULL) - return; - - stash = elf_tdata (abfd)->dwarf2_find_line_info; - - if (stash == NULL) - return; - - for (each = stash->all_comp_units; each; each = each->next_unit) - { - struct abbrev_info **abbrevs = each->abbrevs; - size_t i; - - for (i = 0; i < ABBREV_HASH_SIZE; i++) - { - struct abbrev_info *abbrev = abbrevs[i]; - - while (abbrev) - { - free (abbrev->attrs); - abbrev = abbrev->next; - } - } - - if (each->line_table) - { - free (each->line_table->dirs); - free (each->line_table->files); - } - } - - free (stash->dwarf_abbrev_buffer); - free (stash->dwarf_line_buffer); - free (stash->dwarf_ranges_buffer); -} |