+// Read the abbrev table from an object file.
+
+bool
+Dwarf_abbrev_table::do_read_abbrevs(
+ Relobj* object,
+ unsigned int abbrev_shndx,
+ off_t abbrev_offset)
+{
+ this->clear_abbrev_codes();
+
+ // If we don't have relocations, abbrev_shndx will be 0, and
+ // we'll have to hunt for the .debug_abbrev section.
+ if (abbrev_shndx == 0 && this->abbrev_shndx_ > 0)
+ abbrev_shndx = this->abbrev_shndx_;
+ else if (abbrev_shndx == 0)
+ {
+ for (unsigned int i = 1; i < object->shnum(); ++i)
+ {
+ std::string name = object->section_name(i);
+ if (name == ".debug_abbrev" || name == ".zdebug_abbrev")
+ {
+ abbrev_shndx = i;
+ // Correct the offset. For incremental update links, we have a
+ // relocated offset that is relative to the output section, but
+ // here we need an offset relative to the input section.
+ abbrev_offset -= object->output_section_offset(i);
+ break;
+ }
+ }
+ if (abbrev_shndx == 0)
+ return false;
+ }
+
+ // Get the section contents and decompress if necessary.
+ if (abbrev_shndx != this->abbrev_shndx_)
+ {
+ if (this->owns_buffer_ && this->buffer_ != NULL)
+ {
+ delete[] this->buffer_;
+ this->owns_buffer_ = false;
+ }
+
+ section_size_type buffer_size;
+ this->buffer_ =
+ object->decompressed_section_contents(abbrev_shndx,
+ &buffer_size,
+ &this->owns_buffer_);
+ this->buffer_end_ = this->buffer_ + buffer_size;
+ this->abbrev_shndx_ = abbrev_shndx;
+ }
+
+ this->buffer_pos_ = this->buffer_ + abbrev_offset;
+ return true;
+}
+
+// Lookup the abbrev code entry for CODE. This function is called
+// only when the abbrev code is not in the direct lookup table.
+// It may be in the hash table, it may not have been read yet,
+// or it may not exist in the abbrev table.
+
+const Dwarf_abbrev_table::Abbrev_code*
+Dwarf_abbrev_table::do_get_abbrev(unsigned int code)
+{
+ // See if the abbrev code is already in the hash table.
+ Abbrev_code_table::const_iterator it = this->high_abbrev_codes_.find(code);
+ if (it != this->high_abbrev_codes_.end())
+ return it->second;
+
+ // Read and store abbrev code definitions until we find the
+ // one we're looking for.
+ for (;;)
+ {
+ // Read the abbrev code. A zero here indicates the end of the
+ // abbrev table.
+ size_t len;
+ if (this->buffer_pos_ >= this->buffer_end_)
+ return NULL;
+ uint64_t nextcode = read_unsigned_LEB_128(this->buffer_pos_, &len);
+ if (nextcode == 0)
+ {
+ this->buffer_pos_ = this->buffer_end_;
+ return NULL;
+ }
+ this->buffer_pos_ += len;
+
+ // Read the tag.
+ if (this->buffer_pos_ >= this->buffer_end_)
+ return NULL;
+ uint64_t tag = read_unsigned_LEB_128(this->buffer_pos_, &len);
+ this->buffer_pos_ += len;
+
+ // Read the has_children flag.
+ if (this->buffer_pos_ >= this->buffer_end_)
+ return NULL;
+ bool has_children = *this->buffer_pos_ == elfcpp::DW_CHILDREN_yes;
+ this->buffer_pos_ += 1;
+
+ // Read the list of (attribute, form) pairs.
+ Abbrev_code* entry = new Abbrev_code(tag, has_children);
+ for (;;)
+ {
+ // Read the attribute.
+ if (this->buffer_pos_ >= this->buffer_end_)
+ return NULL;
+ uint64_t attr = read_unsigned_LEB_128(this->buffer_pos_, &len);
+ this->buffer_pos_ += len;
+
+ // Read the form.
+ if (this->buffer_pos_ >= this->buffer_end_)
+ return NULL;
+ uint64_t form = read_unsigned_LEB_128(this->buffer_pos_, &len);
+ this->buffer_pos_ += len;
+
+ // A (0,0) pair terminates the list.
+ if (attr == 0 && form == 0)
+ break;
+
+ if (attr == elfcpp::DW_AT_sibling)
+ entry->has_sibling_attribute = true;
+
+ entry->add_attribute(attr, form);
+ }
+
+ this->store_abbrev(nextcode, entry);
+ if (nextcode == code)
+ return entry;
+ }
+
+ return NULL;
+}
+
+// class Dwarf_ranges_table
+
+// Read the ranges table from an object file.
+
+bool
+Dwarf_ranges_table::read_ranges_table(
+ Relobj* object,
+ const unsigned char* symtab,
+ off_t symtab_size,
+ unsigned int ranges_shndx)
+{
+ // If we've already read this abbrev table, return immediately.
+ if (this->ranges_shndx_ > 0
+ && this->ranges_shndx_ == ranges_shndx)
+ return true;
+
+ // If we don't have relocations, ranges_shndx will be 0, and
+ // we'll have to hunt for the .debug_ranges section.
+ if (ranges_shndx == 0 && this->ranges_shndx_ > 0)
+ ranges_shndx = this->ranges_shndx_;
+ else if (ranges_shndx == 0)
+ {
+ for (unsigned int i = 1; i < object->shnum(); ++i)
+ {
+ std::string name = object->section_name(i);
+ if (name == ".debug_ranges" || name == ".zdebug_ranges")
+ {
+ ranges_shndx = i;
+ this->output_section_offset_ = object->output_section_offset(i);
+ break;
+ }
+ }
+ if (ranges_shndx == 0)
+ return false;
+ }
+
+ // Get the section contents and decompress if necessary.
+ if (ranges_shndx != this->ranges_shndx_)
+ {
+ if (this->owns_ranges_buffer_ && this->ranges_buffer_ != NULL)
+ {
+ delete[] this->ranges_buffer_;
+ this->owns_ranges_buffer_ = false;
+ }
+
+ section_size_type buffer_size;
+ this->ranges_buffer_ =
+ object->decompressed_section_contents(ranges_shndx,
+ &buffer_size,
+ &this->owns_ranges_buffer_);
+ this->ranges_buffer_end_ = this->ranges_buffer_ + buffer_size;
+ this->ranges_shndx_ = ranges_shndx;
+ }
+
+ if (this->ranges_reloc_mapper_ != NULL)
+ {
+ delete this->ranges_reloc_mapper_;
+ this->ranges_reloc_mapper_ = NULL;
+ }
+
+ // For incremental objects, we have no relocations.
+ if (object->is_incremental())
+ return true;
+
+ // Find the relocation section for ".debug_ranges".
+ unsigned int reloc_shndx = 0;
+ unsigned int reloc_type = 0;
+ for (unsigned int i = 0; i < object->shnum(); ++i)
+ {
+ reloc_type = object->section_type(i);
+ if ((reloc_type == elfcpp::SHT_REL
+ || reloc_type == elfcpp::SHT_RELA)
+ && object->section_info(i) == ranges_shndx)
+ {
+ reloc_shndx = i;
+ break;
+ }
+ }
+
+ this->ranges_reloc_mapper_ = make_elf_reloc_mapper(object, symtab,
+ symtab_size);
+ this->ranges_reloc_mapper_->initialize(reloc_shndx, reloc_type);
+ this->reloc_type_ = reloc_type;
+
+ return true;
+}
+
+// Read a range list from section RANGES_SHNDX at offset RANGES_OFFSET.
+
+Dwarf_range_list*
+Dwarf_ranges_table::read_range_list(
+ Relobj* object,
+ const unsigned char* symtab,
+ off_t symtab_size,
+ unsigned int addr_size,
+ unsigned int ranges_shndx,
+ off_t offset)
+{
+ Dwarf_range_list* ranges;
+
+ if (!this->read_ranges_table(object, symtab, symtab_size, ranges_shndx))
+ return NULL;
+
+ // Correct the offset. For incremental update links, we have a
+ // relocated offset that is relative to the output section, but
+ // here we need an offset relative to the input section.
+ offset -= this->output_section_offset_;
+
+ // Read the range list at OFFSET.
+ ranges = new Dwarf_range_list();
+ off_t base = 0;
+ for (;
+ this->ranges_buffer_ + offset < this->ranges_buffer_end_;
+ offset += 2 * addr_size)
+ {
+ off_t start;
+ off_t end;
+
+ // Read the raw contents of the section.
+ if (addr_size == 4)
+ {
+ start = this->dwinfo_->read_from_pointer<32>(this->ranges_buffer_
+ + offset);
+ end = this->dwinfo_->read_from_pointer<32>(this->ranges_buffer_
+ + offset + 4);
+ }
+ else
+ {
+ start = this->dwinfo_->read_from_pointer<64>(this->ranges_buffer_
+ + offset);
+ end = this->dwinfo_->read_from_pointer<64>(this->ranges_buffer_
+ + offset + 8);
+ }
+
+ // Check for relocations and adjust the values.
+ unsigned int shndx1 = 0;
+ unsigned int shndx2 = 0;
+ if (this->ranges_reloc_mapper_ != NULL)
+ {
+ shndx1 = this->lookup_reloc(offset, &start);
+ shndx2 = this->lookup_reloc(offset + addr_size, &end);
+ }
+
+ // End of list is marked by a pair of zeroes.
+ if (shndx1 == 0 && start == 0 && end == 0)
+ break;
+
+ // A "base address selection entry" is identified by
+ // 0xffffffff for the first value of the pair. The second
+ // value is used as a base for subsequent range list entries.
+ if (shndx1 == 0 && start == -1)
+ base = end;
+ else if (shndx1 == shndx2)
+ {
+ if (shndx1 == 0 || object->is_section_included(shndx1))
+ ranges->add(shndx1, base + start, base + end);
+ }
+ else
+ gold_warning(_("%s: DWARF info may be corrupt; offsets in a "
+ "range list entry are in different sections"),
+ object->name().c_str());
+ }
+
+ return ranges;
+}
+
+// Look for a relocation at offset OFF in the range table,
+// and return the section index and offset of the target.
+
+unsigned int
+Dwarf_ranges_table::lookup_reloc(off_t off, off_t* target_off)
+{
+ off_t value;
+ unsigned int shndx =
+ this->ranges_reloc_mapper_->get_reloc_target(off, &value);
+ if (shndx == 0)
+ return 0;
+ if (this->reloc_type_ == elfcpp::SHT_REL)
+ *target_off += value;
+ else
+ *target_off = value;
+ return shndx;
+}
+
+// class Dwarf_pubnames_table
+
+// Read the pubnames section from the object file.
+
+bool
+Dwarf_pubnames_table::read_section(Relobj* object, const unsigned char* symtab,
+ off_t symtab_size)
+{
+ section_size_type buffer_size;
+ unsigned int shndx = 0;
+ const char* name = this->is_pubtypes_ ? "pubtypes" : "pubnames";
+ const char* gnu_name = (this->is_pubtypes_
+ ? "gnu_pubtypes"
+ : "gnu_pubnames");
+
+ for (unsigned int i = 1; i < object->shnum(); ++i)
+ {
+ std::string section_name = object->section_name(i);
+ const char* section_name_suffix = section_name.c_str();
+ if (is_prefix_of(".debug_", section_name_suffix))
+ section_name_suffix += 7;
+ else if (is_prefix_of(".zdebug_", section_name_suffix))
+ section_name_suffix += 8;
+ else
+ continue;
+ if (strcmp(section_name_suffix, name) == 0)
+ {
+ shndx = i;
+ break;
+ }
+ else if (strcmp(section_name_suffix, gnu_name) == 0)
+ {
+ shndx = i;
+ this->is_gnu_style_ = true;
+ break;
+ }
+ }
+ if (shndx == 0)
+ return false;
+
+ this->buffer_ = object->decompressed_section_contents(shndx,
+ &buffer_size,
+ &this->owns_buffer_);
+ if (this->buffer_ == NULL)
+ return false;
+ this->buffer_end_ = this->buffer_ + buffer_size;
+
+ // For incremental objects, we have no relocations.
+ if (object->is_incremental())
+ return true;
+
+ // Find the relocation section
+ unsigned int reloc_shndx = 0;
+ unsigned int reloc_type = 0;
+ for (unsigned int i = 0; i < object->shnum(); ++i)
+ {
+ reloc_type = object->section_type(i);
+ if ((reloc_type == elfcpp::SHT_REL
+ || reloc_type == elfcpp::SHT_RELA)
+ && object->section_info(i) == shndx)
+ {
+ reloc_shndx = i;
+ break;
+ }
+ }
+
+ this->reloc_mapper_ = make_elf_reloc_mapper(object, symtab, symtab_size);
+ this->reloc_mapper_->initialize(reloc_shndx, reloc_type);
+ this->reloc_type_ = reloc_type;
+
+ return true;
+}
+
+// Read the header for the set at OFFSET.
+
+bool
+Dwarf_pubnames_table::read_header(off_t offset)
+{
+ // Make sure we have actually read the section.
+ gold_assert(this->buffer_ != NULL);
+
+ if (offset < 0 || offset + 14 >= this->buffer_end_ - this->buffer_)
+ return false;
+
+ const unsigned char* pinfo = this->buffer_ + offset;
+
+ // Read the unit_length field.
+ uint64_t unit_length = this->dwinfo_->read_from_pointer<32>(pinfo);
+ pinfo += 4;
+ if (unit_length == 0xffffffff)
+ {
+ unit_length = this->dwinfo_->read_from_pointer<64>(pinfo);
+ this->unit_length_ = unit_length + 12;
+ pinfo += 8;
+ this->offset_size_ = 8;
+ }
+ else
+ {
+ this->unit_length_ = unit_length + 4;
+ this->offset_size_ = 4;
+ }
+ this->end_of_table_ = pinfo + unit_length;
+
+ // If unit_length is too big, maybe we should reject the whole table,
+ // but in cases we know about, it seems OK to assume that the table
+ // is valid through the actual end of the section.
+ if (this->end_of_table_ > this->buffer_end_)
+ this->end_of_table_ = this->buffer_end_;
+
+ // Check the version.
+ unsigned int version = this->dwinfo_->read_from_pointer<16>(pinfo);
+ pinfo += 2;
+ if (version != 2)
+ return false;
+
+ this->reloc_mapper_->get_reloc_target(pinfo - this->buffer_,
+ &this->cu_offset_);
+
+ // Skip the debug_info_offset and debug_info_size fields.
+ pinfo += 2 * this->offset_size_;
+
+ if (pinfo >= this->buffer_end_)
+ return false;
+
+ this->pinfo_ = pinfo;
+ return true;
+}
+
+// Read the next name from the set.
+
+const char*
+Dwarf_pubnames_table::next_name(uint8_t* flag_byte)
+{
+ const unsigned char* pinfo = this->pinfo_;
+
+ // Check for end of list. The table should be terminated by an
+ // entry containing nothing but a DIE offset of 0.
+ if (pinfo + this->offset_size_ >= this->end_of_table_)
+ return NULL;
+
+ // Skip the offset within the CU. If this is zero, but we're not
+ // at the end of the table, then we have a real pubnames entry
+ // whose DIE offset is 0 (likely to be a GCC bug). Since we
+ // don't actually use the DIE offset in building .gdb_index,
+ // it's harmless.
+ pinfo += this->offset_size_;
+
+ if (this->is_gnu_style_)
+ *flag_byte = *pinfo++;
+ else
+ *flag_byte = 0;
+
+ // Return a pointer to the string at the current location,
+ // and advance the pointer to the next entry.
+ const char* ret = reinterpret_cast<const char*>(pinfo);
+ while (pinfo < this->buffer_end_ && *pinfo != '\0')
+ ++pinfo;
+ if (pinfo < this->buffer_end_)
+ ++pinfo;
+
+ this->pinfo_ = pinfo;
+ return ret;
+}
+
+// class Dwarf_die
+
+Dwarf_die::Dwarf_die(
+ Dwarf_info_reader* dwinfo,
+ off_t die_offset,
+ Dwarf_die* parent)
+ : dwinfo_(dwinfo), parent_(parent), die_offset_(die_offset),
+ child_offset_(0), sibling_offset_(0), abbrev_code_(NULL), attributes_(),
+ attributes_read_(false), name_(NULL), name_off_(-1), linkage_name_(NULL),
+ linkage_name_off_(-1), string_shndx_(0), specification_(0),
+ abstract_origin_(0)
+{
+ size_t len;
+ const unsigned char* pdie = dwinfo->buffer_at_offset(die_offset);
+ if (pdie == NULL)
+ return;
+ unsigned int code = read_unsigned_LEB_128(pdie, &len);
+ if (code == 0)
+ {
+ if (parent != NULL)
+ parent->set_sibling_offset(die_offset + len);
+ return;
+ }
+ this->attr_offset_ = len;
+
+ // Lookup the abbrev code in the abbrev table.
+ this->abbrev_code_ = dwinfo->get_abbrev(code);
+}
+
+// Read all the attributes of the DIE.
+
+bool
+Dwarf_die::read_attributes()
+{
+ if (this->attributes_read_)
+ return true;
+
+ gold_assert(this->abbrev_code_ != NULL);
+
+ const unsigned char* pdie =
+ this->dwinfo_->buffer_at_offset(this->die_offset_);
+ if (pdie == NULL)
+ return false;
+ const unsigned char* pattr = pdie + this->attr_offset_;
+
+ unsigned int nattr = this->abbrev_code_->attributes.size();
+ this->attributes_.reserve(nattr);
+ for (unsigned int i = 0; i < nattr; ++i)
+ {
+ size_t len;
+ unsigned int attr = this->abbrev_code_->attributes[i].attr;
+ unsigned int form = this->abbrev_code_->attributes[i].form;
+ if (form == elfcpp::DW_FORM_indirect)
+ {
+ form = read_unsigned_LEB_128(pattr, &len);
+ pattr += len;
+ }
+ off_t attr_off = this->die_offset_ + (pattr - pdie);
+ bool ref_form = false;
+ Attribute_value attr_value;
+ attr_value.attr = attr;
+ attr_value.form = form;
+ attr_value.aux.shndx = 0;
+ switch(form)
+ {
+ case elfcpp::DW_FORM_flag_present:
+ attr_value.val.intval = 1;
+ break;
+ case elfcpp::DW_FORM_strp:
+ {
+ off_t str_off;
+ if (this->dwinfo_->offset_size() == 4)
+ str_off = this->dwinfo_->read_from_pointer<32>(&pattr);
+ else
+ str_off = this->dwinfo_->read_from_pointer<64>(&pattr);
+ unsigned int shndx =
+ this->dwinfo_->lookup_reloc(attr_off, &str_off);
+ attr_value.aux.shndx = shndx;
+ attr_value.val.refval = str_off;
+ break;
+ }
+ case elfcpp::DW_FORM_sec_offset:
+ {
+ off_t sec_off;
+ if (this->dwinfo_->offset_size() == 4)
+ sec_off = this->dwinfo_->read_from_pointer<32>(&pattr);
+ else
+ sec_off = this->dwinfo_->read_from_pointer<64>(&pattr);
+ unsigned int shndx =
+ this->dwinfo_->lookup_reloc(attr_off, &sec_off);
+ attr_value.aux.shndx = shndx;
+ attr_value.val.refval = sec_off;
+ ref_form = true;
+ break;
+ }
+ case elfcpp::DW_FORM_addr:
+ {
+ off_t sec_off;
+ if (this->dwinfo_->address_size() == 4)
+ sec_off = this->dwinfo_->read_from_pointer<32>(&pattr);
+ else
+ sec_off = this->dwinfo_->read_from_pointer<64>(&pattr);
+ unsigned int shndx =
+ this->dwinfo_->lookup_reloc(attr_off, &sec_off);
+ attr_value.aux.shndx = shndx;
+ attr_value.val.refval = sec_off;
+ ref_form = true;
+ break;
+ }
+ case elfcpp::DW_FORM_ref_addr:
+ {
+ off_t sec_off;
+ if (this->dwinfo_->ref_addr_size() == 4)
+ sec_off = this->dwinfo_->read_from_pointer<32>(&pattr);
+ else
+ sec_off = this->dwinfo_->read_from_pointer<64>(&pattr);
+ unsigned int shndx =
+ this->dwinfo_->lookup_reloc(attr_off, &sec_off);
+ attr_value.aux.shndx = shndx;
+ attr_value.val.refval = sec_off;
+ ref_form = true;
+ break;
+ }
+ case elfcpp::DW_FORM_block1:
+ attr_value.aux.blocklen = *pattr++;
+ attr_value.val.blockval = pattr;
+ pattr += attr_value.aux.blocklen;
+ break;
+ case elfcpp::DW_FORM_block2:
+ attr_value.aux.blocklen =
+ this->dwinfo_->read_from_pointer<16>(&pattr);
+ attr_value.val.blockval = pattr;
+ pattr += attr_value.aux.blocklen;
+ break;
+ case elfcpp::DW_FORM_block4:
+ attr_value.aux.blocklen =
+ this->dwinfo_->read_from_pointer<32>(&pattr);
+ attr_value.val.blockval = pattr;
+ pattr += attr_value.aux.blocklen;
+ break;
+ case elfcpp::DW_FORM_block:
+ case elfcpp::DW_FORM_exprloc:
+ attr_value.aux.blocklen = read_unsigned_LEB_128(pattr, &len);
+ attr_value.val.blockval = pattr + len;
+ pattr += len + attr_value.aux.blocklen;
+ break;
+ case elfcpp::DW_FORM_data1:
+ case elfcpp::DW_FORM_flag:
+ attr_value.val.intval = *pattr++;
+ break;
+ case elfcpp::DW_FORM_ref1:
+ attr_value.val.refval = *pattr++;
+ ref_form = true;
+ break;
+ case elfcpp::DW_FORM_data2:
+ attr_value.val.intval =
+ this->dwinfo_->read_from_pointer<16>(&pattr);
+ break;
+ case elfcpp::DW_FORM_ref2:
+ attr_value.val.refval =
+ this->dwinfo_->read_from_pointer<16>(&pattr);
+ ref_form = true;
+ break;
+ case elfcpp::DW_FORM_data4:
+ {
+ off_t sec_off;
+ sec_off = this->dwinfo_->read_from_pointer<32>(&pattr);
+ unsigned int shndx =
+ this->dwinfo_->lookup_reloc(attr_off, &sec_off);
+ attr_value.aux.shndx = shndx;
+ attr_value.val.intval = sec_off;
+ break;
+ }
+ case elfcpp::DW_FORM_ref4:
+ {
+ off_t sec_off;
+ sec_off = this->dwinfo_->read_from_pointer<32>(&pattr);
+ unsigned int shndx =
+ this->dwinfo_->lookup_reloc(attr_off, &sec_off);
+ attr_value.aux.shndx = shndx;
+ attr_value.val.refval = sec_off;
+ ref_form = true;
+ break;
+ }
+ case elfcpp::DW_FORM_data8:
+ {
+ off_t sec_off;
+ sec_off = this->dwinfo_->read_from_pointer<64>(&pattr);
+ unsigned int shndx =
+ this->dwinfo_->lookup_reloc(attr_off, &sec_off);
+ attr_value.aux.shndx = shndx;
+ attr_value.val.intval = sec_off;
+ break;
+ }
+ case elfcpp::DW_FORM_ref_sig8:
+ attr_value.val.uintval =
+ this->dwinfo_->read_from_pointer<64>(&pattr);
+ break;
+ case elfcpp::DW_FORM_ref8:
+ {
+ off_t sec_off;
+ sec_off = this->dwinfo_->read_from_pointer<64>(&pattr);
+ unsigned int shndx =
+ this->dwinfo_->lookup_reloc(attr_off, &sec_off);
+ attr_value.aux.shndx = shndx;
+ attr_value.val.refval = sec_off;
+ ref_form = true;
+ break;
+ }
+ case elfcpp::DW_FORM_ref_udata:
+ attr_value.val.refval = read_unsigned_LEB_128(pattr, &len);
+ ref_form = true;
+ pattr += len;
+ break;
+ case elfcpp::DW_FORM_udata:
+ case elfcpp::DW_FORM_GNU_addr_index:
+ case elfcpp::DW_FORM_GNU_str_index:
+ attr_value.val.uintval = read_unsigned_LEB_128(pattr, &len);
+ pattr += len;
+ break;
+ case elfcpp::DW_FORM_sdata:
+ attr_value.val.intval = read_signed_LEB_128(pattr, &len);
+ pattr += len;
+ break;
+ case elfcpp::DW_FORM_string:
+ attr_value.val.stringval = reinterpret_cast<const char*>(pattr);
+ len = strlen(attr_value.val.stringval);
+ pattr += len + 1;
+ break;
+ default:
+ return false;
+ }
+
+ // Cache the most frequently-requested attributes.
+ switch (attr)
+ {
+ case elfcpp::DW_AT_name:
+ if (form == elfcpp::DW_FORM_string)
+ this->name_ = attr_value.val.stringval;
+ else if (form == elfcpp::DW_FORM_strp)
+ {
+ // All indirect strings should refer to the same
+ // string section, so we just save the last one seen.
+ this->string_shndx_ = attr_value.aux.shndx;
+ this->name_off_ = attr_value.val.refval;
+ }
+ break;
+ case elfcpp::DW_AT_linkage_name:
+ case elfcpp::DW_AT_MIPS_linkage_name:
+ if (form == elfcpp::DW_FORM_string)
+ this->linkage_name_ = attr_value.val.stringval;
+ else if (form == elfcpp::DW_FORM_strp)
+ {
+ // All indirect strings should refer to the same
+ // string section, so we just save the last one seen.
+ this->string_shndx_ = attr_value.aux.shndx;
+ this->linkage_name_off_ = attr_value.val.refval;
+ }
+ break;
+ case elfcpp::DW_AT_specification:
+ if (ref_form)
+ this->specification_ = attr_value.val.refval;
+ break;
+ case elfcpp::DW_AT_abstract_origin:
+ if (ref_form)
+ this->abstract_origin_ = attr_value.val.refval;
+ break;
+ case elfcpp::DW_AT_sibling:
+ if (ref_form && attr_value.aux.shndx == 0)
+ this->sibling_offset_ = attr_value.val.refval;
+ default:
+ break;
+ }
+
+ this->attributes_.push_back(attr_value);
+ }
+
+ // Now that we know where the next DIE begins, record the offset
+ // to avoid later recalculation.
+ if (this->has_children())
+ this->child_offset_ = this->die_offset_ + (pattr - pdie);
+ else
+ this->sibling_offset_ = this->die_offset_ + (pattr - pdie);
+
+ this->attributes_read_ = true;
+ return true;
+}
+
+// Skip all the attributes of the DIE and return the offset of the next DIE.
+
+off_t
+Dwarf_die::skip_attributes()
+{
+ gold_assert(this->abbrev_code_ != NULL);
+
+ const unsigned char* pdie =
+ this->dwinfo_->buffer_at_offset(this->die_offset_);
+ if (pdie == NULL)
+ return 0;
+ const unsigned char* pattr = pdie + this->attr_offset_;
+
+ for (unsigned int i = 0; i < this->abbrev_code_->attributes.size(); ++i)
+ {
+ size_t len;
+ unsigned int form = this->abbrev_code_->attributes[i].form;
+ if (form == elfcpp::DW_FORM_indirect)
+ {
+ form = read_unsigned_LEB_128(pattr, &len);
+ pattr += len;
+ }
+ switch(form)
+ {
+ case elfcpp::DW_FORM_flag_present:
+ break;
+ case elfcpp::DW_FORM_strp:
+ case elfcpp::DW_FORM_sec_offset:
+ pattr += this->dwinfo_->offset_size();
+ break;
+ case elfcpp::DW_FORM_addr:
+ pattr += this->dwinfo_->address_size();
+ break;
+ case elfcpp::DW_FORM_ref_addr:
+ pattr += this->dwinfo_->ref_addr_size();
+ break;
+ case elfcpp::DW_FORM_block1:
+ pattr += 1 + *pattr;
+ break;
+ case elfcpp::DW_FORM_block2:
+ {
+ uint16_t block_size;
+ block_size = this->dwinfo_->read_from_pointer<16>(&pattr);
+ pattr += block_size;
+ break;
+ }
+ case elfcpp::DW_FORM_block4:
+ {
+ uint32_t block_size;
+ block_size = this->dwinfo_->read_from_pointer<32>(&pattr);
+ pattr += block_size;
+ break;
+ }
+ case elfcpp::DW_FORM_block:
+ case elfcpp::DW_FORM_exprloc:
+ {
+ uint64_t block_size;
+ block_size = read_unsigned_LEB_128(pattr, &len);
+ pattr += len + block_size;
+ break;
+ }
+ case elfcpp::DW_FORM_data1:
+ case elfcpp::DW_FORM_ref1:
+ case elfcpp::DW_FORM_flag:
+ pattr += 1;
+ break;
+ case elfcpp::DW_FORM_data2:
+ case elfcpp::DW_FORM_ref2:
+ pattr += 2;
+ break;
+ case elfcpp::DW_FORM_data4:
+ case elfcpp::DW_FORM_ref4:
+ pattr += 4;
+ break;
+ case elfcpp::DW_FORM_data8:
+ case elfcpp::DW_FORM_ref8:
+ case elfcpp::DW_FORM_ref_sig8:
+ pattr += 8;
+ break;
+ case elfcpp::DW_FORM_ref_udata:
+ case elfcpp::DW_FORM_udata:
+ case elfcpp::DW_FORM_GNU_addr_index:
+ case elfcpp::DW_FORM_GNU_str_index:
+ read_unsigned_LEB_128(pattr, &len);
+ pattr += len;
+ break;
+ case elfcpp::DW_FORM_sdata:
+ read_signed_LEB_128(pattr, &len);
+ pattr += len;
+ break;
+ case elfcpp::DW_FORM_string:
+ len = strlen(reinterpret_cast<const char*>(pattr));
+ pattr += len + 1;
+ break;
+ default:
+ return 0;
+ }
+ }
+
+ return this->die_offset_ + (pattr - pdie);
+}
+
+// Get the name of the DIE and cache it.
+
+void
+Dwarf_die::set_name()
+{
+ if (this->name_ != NULL || !this->read_attributes())
+ return;
+ if (this->name_off_ != -1)
+ this->name_ = this->dwinfo_->get_string(this->name_off_,
+ this->string_shndx_);
+}
+
+// Get the linkage name of the DIE and cache it.
+
+void
+Dwarf_die::set_linkage_name()
+{
+ if (this->linkage_name_ != NULL || !this->read_attributes())
+ return;
+ if (this->linkage_name_off_ != -1)
+ this->linkage_name_ = this->dwinfo_->get_string(this->linkage_name_off_,
+ this->string_shndx_);
+}
+
+// Return the value of attribute ATTR.
+
+const Dwarf_die::Attribute_value*
+Dwarf_die::attribute(unsigned int attr)
+{
+ if (!this->read_attributes())
+ return NULL;
+ for (unsigned int i = 0; i < this->attributes_.size(); ++i)
+ {
+ if (this->attributes_[i].attr == attr)
+ return &this->attributes_[i];
+ }
+ return NULL;
+}
+
+const char*
+Dwarf_die::string_attribute(unsigned int attr)
+{
+ const Attribute_value* attr_val = this->attribute(attr);
+ if (attr_val == NULL)
+ return NULL;
+ switch (attr_val->form)
+ {
+ case elfcpp::DW_FORM_string:
+ return attr_val->val.stringval;
+ case elfcpp::DW_FORM_strp:
+ return this->dwinfo_->get_string(attr_val->val.refval,
+ attr_val->aux.shndx);
+ default:
+ return NULL;
+ }
+}