# Eli Bendersky (eliben@gmail.com)
# This code is in the public domain
#-------------------------------------------------------------------------------
+import os
from collections import namedtuple
+from bisect import bisect_right
+from ..construct.lib.container import Container
from ..common.exceptions import DWARFError
-from ..common.utils import struct_parse, dwarf_assert
+from ..common.utils import (struct_parse, dwarf_assert,
+ parse_cstring_from_stream)
from .structs import DWARFStructs
from .compileunit import CompileUnit
from .abbrevtable import AbbrevTable
+from .lineprogram import LineProgram
+from .callframe import CallFrameInfo
+from .locationlists import LocationLists, LocationListsPair
+from .ranges import RangeLists, RangeListsPair
+from .aranges import ARanges
+from .namelut import NameLUT
+from .dwarf_util import _get_base_offset
-# Describes a debug section in a stream: offset and size
+# Describes a debug section
#
-DebugSectionLocator = namedtuple('DebugSectionLocator', 'offset size')
+# stream: a stream object containing the data of this section
+# name: section name in the container file
+# global_offset: the global offset of the section in its container file
+# size: the size of the section's data, in bytes
+# address: the virtual address for the section's data
+#
+# 'name' and 'global_offset' are for descriptional purposes only and
+# aren't strictly required for the DWARF parsing to work. 'address' is required
+# to properly decode the special '.eh_frame' format.
+#
+DebugSectionDescriptor = namedtuple('DebugSectionDescriptor',
+ 'stream name global_offset size address')
+
+
+# Some configuration parameters for the DWARF reader. This exists to allow
+# DWARFInfo to be independent from any specific file format/container.
+#
+# little_endian:
+# boolean flag specifying whether the data in the file is little endian
+#
+# machine_arch:
+# Machine architecture as a string. For example 'x86' or 'x64'
+#
+# default_address_size:
+# The default address size for the container file (sizeof pointer, in bytes)
+#
+DwarfConfig = namedtuple('DwarfConfig',
+ 'little_endian machine_arch default_address_size')
class DWARFInfo(object):
- """ Acts also as a "context" to other major objects, bridging between
- various parts of the debug infromation.
+ """ Acts also as a "context" to other major objects, bridging between
+ various parts of the debug information.
"""
def __init__(self,
- stream,
- little_endian,
- debug_info_loc,
- debug_abbrev_loc,
- debug_str_loc,
- debug_line_loc):
- """ stream:
- A stream (file-like object) that contains debug sections
-
- little_endian:
- Section contents are in little-endian data format
-
- debug_*_loc:
- DebugSectionLocator for this section, specifying where it can
- be found in the stream
- """
- self.stream = stream
- self.debug_info_loc = debug_info_loc
- self.debug_abbrev_loc = debug_abbrev_loc
- self.debug_str_loc = debug_str_loc
- self.debug_line_loc = debug_line_loc
-
- self.little_endian = little_endian
- self.dwarf_format = 32
+ config,
+ debug_info_sec,
+ debug_aranges_sec,
+ debug_abbrev_sec,
+ debug_frame_sec,
+ eh_frame_sec,
+ debug_str_sec,
+ debug_loc_sec,
+ debug_ranges_sec,
+ debug_line_sec,
+ debug_pubtypes_sec,
+ debug_pubnames_sec,
+ debug_addr_sec,
+ debug_str_offsets_sec,
+ debug_line_str_sec,
+ debug_loclists_sec,
+ debug_rnglists_sec,
+ debug_sup_sec,
+ gnu_debugaltlink_sec
+ ):
+ """ config:
+ A DwarfConfig object
+
+ debug_*_sec:
+ DebugSectionDescriptor for a section. Pass None for sections
+ that don't exist. These arguments are best given with
+ keyword syntax.
+ """
+ self.config = config
+ self.debug_info_sec = debug_info_sec
+ self.debug_aranges_sec = debug_aranges_sec
+ self.debug_abbrev_sec = debug_abbrev_sec
+ self.debug_frame_sec = debug_frame_sec
+ self.eh_frame_sec = eh_frame_sec
+ self.debug_str_sec = debug_str_sec
+ self.debug_loc_sec = debug_loc_sec
+ self.debug_ranges_sec = debug_ranges_sec
+ self.debug_line_sec = debug_line_sec
+ self.debug_addr_sec = debug_addr_sec
+ self.debug_str_offsets_sec = debug_str_offsets_sec
+ self.debug_line_str_sec = debug_line_str_sec
+ self.debug_pubtypes_sec = debug_pubtypes_sec
+ self.debug_pubnames_sec = debug_pubnames_sec
+ self.debug_loclists_sec = debug_loclists_sec
+ self.debug_rnglists_sec = debug_rnglists_sec
+ self.debug_sup_sec = debug_sup_sec
+ self.gnu_debugaltlink_sec = gnu_debugaltlink_sec
+
+ # Sets the supplementary_dwarfinfo to None. Client code can set this
+ # to something else, typically a DWARFInfo file read from an ELFFile
+ # which path is stored in the debug_sup_sec or gnu_debugaltlink_sec.
+ self.supplementary_dwarfinfo = None
+
+ # This is the DWARFStructs the context uses, so it doesn't depend on
+ # DWARF format and address_size (these are determined per CU) - set them
+ # to default values.
self.structs = DWARFStructs(
- little_endian=self.little_endian,
- dwarf_format=self.dwarf_format)
-
- # Populate the list with CUs found in debug_info
- self._CU = self._parse_CUs()
-
+ little_endian=self.config.little_endian,
+ dwarf_format=32,
+ address_size=self.config.default_address_size)
+
# Cache for abbrev tables: a dict keyed by offset
self._abbrevtable_cache = {}
-
- def num_CUs(self):
- """ Number of compile units in the debug info
+ # Cache for program lines tables: a dict keyed by offset
+ self._linetable_cache = {}
+
+ # Cache of compile units and map of their offsets for bisect lookup.
+ # Access with .iter_CUs(), .get_CU_containing(), and/or .get_CU_at().
+ self._cu_cache = []
+ self._cu_offsets_map = []
+
+ @property
+ def has_debug_info(self):
+ """ Return whether this contains debug information.
+
+ It can be not the case when the ELF only contains .eh_frame, which is
+ encoded DWARF but not actually for debugging.
"""
- return len(self._CU)
-
- def get_CU(self, n):
- """ Get the compile unit (CompileUnit object) at index #n
+ return bool(self.debug_info_sec)
+
+ def get_DIE_from_lut_entry(self, lut_entry):
+ """ Get the DIE from the pubnames or putbtypes lookup table entry.
+
+ lut_entry:
+ A NameLUTEntry object from a NameLUT instance (see
+ .get_pubmames and .get_pubtypes methods).
+ """
+ cu = self.get_CU_at(lut_entry.cu_ofs)
+ return self.get_DIE_from_refaddr(lut_entry.die_ofs, cu)
+
+ def get_DIE_from_refaddr(self, refaddr, cu=None):
+ """ Given a .debug_info section offset of a DIE, return the DIE.
+
+ refaddr:
+ The refaddr may come from a DW_FORM_ref_addr attribute.
+
+ cu:
+ The compile unit object, if known. If None a search
+ from the closest offset less than refaddr will be performed.
+ """
+ if cu is None:
+ cu = self.get_CU_containing(refaddr)
+ return cu.get_DIE_from_refaddr(refaddr)
+
+ def get_CU_containing(self, refaddr):
+ """ Find the CU that includes the given reference address in the
+ .debug_info section.
+
+ refaddr:
+ Either a refaddr of a DIE (possibly from a DW_FORM_ref_addr
+ attribute) or the section offset of a CU (possibly from an
+ aranges table).
+
+ This function will parse and cache CUs until the search criteria
+ is met, starting from the closest known offset lessthan or equal
+ to the given address.
+ """
+ dwarf_assert(
+ self.has_debug_info,
+ 'CU lookup but no debug info section')
+ dwarf_assert(
+ 0 <= refaddr < self.debug_info_sec.size,
+ "refaddr %s beyond .debug_info size" % refaddr)
+
+ # The CU containing the DIE we desire will be to the right of the
+ # DIE insert point. If we have a CU address, then it will be a
+ # match but the right insert minus one will still be the item.
+ # The first CU starts at offset 0, so start there if cache is empty.
+ i = bisect_right(self._cu_offsets_map, refaddr)
+ start = self._cu_offsets_map[i - 1] if i > 0 else 0
+
+ # parse CUs until we find one containing the desired address
+ for cu in self._parse_CUs_iter(start):
+ if cu.cu_offset <= refaddr < cu.cu_offset + cu.size:
+ return cu
+
+ raise ValueError("CU for reference address %s not found" % refaddr)
+
+ def get_CU_at(self, offset):
+ """ Given a CU header offset, return the parsed CU.
+
+ offset:
+ The offset may be from an accelerated access table such as
+ the public names, public types, address range table, or
+ prior use.
+
+ This function will directly parse the CU doing no validation of
+ the offset beyond checking the size of the .debug_info section.
"""
- return self._CU[n]
-
+ dwarf_assert(
+ self.has_debug_info,
+ 'CU lookup but no debug info section')
+ dwarf_assert(
+ 0 <= offset < self.debug_info_sec.size,
+ "offset %s beyond .debug_info size" % offset)
+
+ return self._cached_CU_at_offset(offset)
+
def iter_CUs(self):
""" Yield all the compile units (CompileUnit objects) in the debug info
"""
- for i in range(self.num_CUs()):
- yield self.get_CU(i)
-
+ return self._parse_CUs_iter()
+
def get_abbrev_table(self, offset):
""" Get an AbbrevTable from the given offset in the debug_abbrev
section.
-
+
The only verification done on the offset is that it's within the
bounds of the section (if not, an exception is raised).
It is the caller's responsibility to make sure the offset actually
points to a valid abbreviation table.
-
+
AbbrevTable objects are cached internally (two calls for the same
offset will return the same object).
"""
dwarf_assert(
- offset < self.debug_abbrev_loc.size,
+ offset < self.debug_abbrev_sec.size,
"Offset '0x%x' to abbrev table out of section bounds" % offset)
if offset not in self._abbrevtable_cache:
self._abbrevtable_cache[offset] = AbbrevTable(
structs=self.structs,
- stream=self.stream,
- offset=offset + self.debug_abbrev_loc.offset)
+ stream=self.debug_abbrev_sec.stream,
+ offset=offset)
return self._abbrevtable_cache[offset]
-
- def info_offset2absolute(self, offset):
- """ Given an offset into the debug_info section, translate it to an
- absolute offset into the stream. Raise an exception if the offset
- exceeds the section bounds.
+
+ def get_string_from_table(self, offset):
+ """ Obtain a string from the string table section, given an offset
+ relative to the section.
+ """
+ return parse_cstring_from_stream(self.debug_str_sec.stream, offset)
+
+ def get_string_from_linetable(self, offset):
+ """ Obtain a string from the string table section, given an offset
+ relative to the section.
+ """
+ return parse_cstring_from_stream(self.debug_line_str_sec.stream, offset)
+
+ def line_program_for_CU(self, CU):
+ """ Given a CU object, fetch the line program it points to from the
+ .debug_line section.
+ If the CU doesn't point to a line program, return None.
+
+ Note about directory and file names. They are returned as two collections
+ in the lineprogram object's header - include_directory and file_entry.
+
+ In DWARFv5, they have introduced a different, extensible format for those
+ collections. So in a lineprogram v5+, there are two more collections in
+ the header - directories and file_names. Those might contain extra DWARFv5
+ information that is not exposed in include_directory and file_entry.
+ """
+ # The line program is pointed to by the DW_AT_stmt_list attribute of
+ # the top DIE of a CU.
+ top_DIE = CU.get_top_DIE()
+ if 'DW_AT_stmt_list' in top_DIE.attributes:
+ return self._parse_line_program_at_offset(
+ top_DIE.attributes['DW_AT_stmt_list'].value, CU.structs)
+ else:
+ return None
+
+ def has_CFI(self):
+ """ Does this dwarf info have a dwarf_frame CFI section?
+ """
+ return self.debug_frame_sec is not None
+
+ def CFI_entries(self):
+ """ Get a list of dwarf_frame CFI entries from the .debug_frame section.
+ """
+ cfi = CallFrameInfo(
+ stream=self.debug_frame_sec.stream,
+ size=self.debug_frame_sec.size,
+ address=self.debug_frame_sec.address,
+ base_structs=self.structs)
+ return cfi.get_entries()
+
+ def has_EH_CFI(self):
+ """ Does this dwarf info have a eh_frame CFI section?
+ """
+ return self.eh_frame_sec is not None
+
+ def EH_CFI_entries(self):
+ """ Get a list of eh_frame CFI entries from the .eh_frame section.
+ """
+ cfi = CallFrameInfo(
+ stream=self.eh_frame_sec.stream,
+ size=self.eh_frame_sec.size,
+ address=self.eh_frame_sec.address,
+ base_structs=self.structs,
+ for_eh_frame=True)
+ return cfi.get_entries()
+
+ def get_pubtypes(self):
"""
+ Returns a NameLUT object that contains information read from the
+ .debug_pubtypes section in the ELF file.
+
+ NameLUT is essentially a dictionary containing the CU/DIE offsets of
+ each symbol. See the NameLUT doc string for more details.
+ """
+
+ if self.debug_pubtypes_sec:
+ return NameLUT(self.debug_pubtypes_sec.stream,
+ self.debug_pubtypes_sec.size,
+ self.structs)
+ else:
+ return None
+
+ def get_pubnames(self):
+ """
+ Returns a NameLUT object that contains information read from the
+ .debug_pubnames section in the ELF file.
+
+ NameLUT is essentially a dictionary containing the CU/DIE offsets of
+ each symbol. See the NameLUT doc string for more details.
+ """
+
+ if self.debug_pubnames_sec:
+ return NameLUT(self.debug_pubnames_sec.stream,
+ self.debug_pubnames_sec.size,
+ self.structs)
+ else:
+ return None
+
+ def get_aranges(self):
+ """ Get an ARanges object representing the .debug_aranges section of
+ the DWARF data, or None if the section doesn't exist
+ """
+ if self.debug_aranges_sec:
+ return ARanges(self.debug_aranges_sec.stream,
+ self.debug_aranges_sec.size,
+ self.structs)
+ else:
+ return None
+
+ def location_lists(self):
+ """ Get a LocationLists object representing the .debug_loc/debug_loclists section of
+ the DWARF data, or None if this section doesn't exist.
+
+ If both sections exist, it returns a LocationListsPair.
+ """
+ if self.debug_loclists_sec and self.debug_loc_sec is None:
+ return LocationLists(self.debug_loclists_sec.stream, self.structs, 5, self)
+ elif self.debug_loc_sec and self.debug_loclists_sec is None:
+ return LocationLists(self.debug_loc_sec.stream, self.structs, 4, self)
+ elif self.debug_loc_sec and self.debug_loclists_sec:
+ return LocationListsPair(self.debug_loc_sec.stream, self.debug_loclists_sec.stream, self.structs, self)
+ else:
+ return None
+
+ def range_lists(self):
+ """ Get a RangeLists object representing the .debug_ranges/.debug_rnglists section of
+ the DWARF data, or None if this section doesn't exist.
+
+ If both sections exist, it returns a RangeListsPair.
+ """
+ if self.debug_rnglists_sec and self.debug_ranges_sec is None:
+ return RangeLists(self.debug_rnglists_sec.stream, self.structs, 5, self)
+ elif self.debug_ranges_sec and self.debug_rnglists_sec is None:
+ return RangeLists(self.debug_ranges_sec.stream, self.structs, 4, self)
+ elif self.debug_ranges_sec and self.debug_rnglists_sec:
+ return RangeListsPair(self.debug_ranges_sec.stream, self.debug_rnglists_sec.stream, self.structs, self)
+ else:
+ return None
+
+ def get_addr(self, cu, addr_index):
+ """Provided a CU and an index, retrieves an address from the debug_addr section
+ """
+ if not self.debug_addr_sec:
+ raise DWARFError('The file does not contain a debug_addr section for indirect address access')
+ # Selectors are not supported, but no assert on that. TODO?
+ cu_addr_base = _get_base_offset(cu, 'DW_AT_addr_base')
+ return struct_parse(cu.structs.Dwarf_target_addr(''), self.debug_addr_sec.stream, cu_addr_base + addr_index*cu.header.address_size)
+
+ #------ PRIVATE ------#
+
+ def _parse_CUs_iter(self, offset=0):
+ """ Iterate CU objects in order of appearance in the debug_info section.
+
+ offset:
+ The offset of the first CU to yield. Additional iterations
+ will return the sequential unit objects.
+
+ See .iter_CUs(), .get_CU_containing(), and .get_CU_at().
+ """
+ if self.debug_info_sec is None:
+ return
+
+ while offset < self.debug_info_sec.size:
+ cu = self._cached_CU_at_offset(offset)
+ # Compute the offset of the next CU in the section. The unit_length
+ # field of the CU header contains its size not including the length
+ # field itself.
+ offset = ( offset +
+ cu['unit_length'] +
+ cu.structs.initial_length_field_size())
+ yield cu
+
+ def _cached_CU_at_offset(self, offset):
+ """ Return the CU with unit header at the given offset into the
+ debug_info section from the cache. If not present, the unit is
+ header is parsed and the object is installed in the cache.
+
+ offset:
+ The offset of the unit header in the .debug_info section
+ to of the unit to fetch from the cache.
+
+ See get_CU_at().
+ """
+ # Find the insert point for the requested offset. With bisect_right,
+ # if this entry is present in the cache it will be the prior entry.
+ i = bisect_right(self._cu_offsets_map, offset)
+ if i >= 1 and offset == self._cu_offsets_map[i - 1]:
+ return self._cu_cache[i - 1]
+
+ # Parse the CU and insert the offset and object into the cache.
+ # The ._cu_offsets_map[] contains just the numeric offsets for the
+ # bisect_right search while the parallel indexed ._cu_cache[] holds
+ # the object references.
+ cu = self._parse_CU_at_offset(offset)
+ self._cu_offsets_map.insert(i, offset)
+ self._cu_cache.insert(i, cu)
+ return cu
+
+ def _parse_CU_at_offset(self, offset):
+ """ Parse and return a CU at the given offset in the debug_info stream.
+ """
+ # Section 7.4 (32-bit and 64-bit DWARF Formats) of the DWARF spec v3
+ # states that the first 32-bit word of the CU header determines
+ # whether the CU is represented with 32-bit or 64-bit DWARF format.
+ #
+ # So we peek at the first word in the CU header to determine its
+ # dwarf format. Based on it, we then create a new DWARFStructs
+ # instance suitable for this CU and use it to parse the rest.
+ #
+ initial_length = struct_parse(
+ self.structs.Dwarf_uint32(''), self.debug_info_sec.stream, offset)
+ dwarf_format = 64 if initial_length == 0xFFFFFFFF else 32
+
+
+ # Temporary structs for parsing the header
+ # The structs for the rest of the CU depend on the header data.
+ #
+ cu_structs = DWARFStructs(
+ little_endian=self.config.little_endian,
+ dwarf_format=dwarf_format,
+ address_size=4,
+ dwarf_version=2)
+
+ cu_header = struct_parse(
+ cu_structs.Dwarf_CU_header, self.debug_info_sec.stream, offset)
+
+ # structs for the rest of the CU, taking into account bitness and DWARF version
+ cu_structs = DWARFStructs(
+ little_endian=self.config.little_endian,
+ dwarf_format=dwarf_format,
+ address_size=cu_header['address_size'],
+ dwarf_version=cu_header['version'])
+
+ cu_die_offset = self.debug_info_sec.stream.tell()
dwarf_assert(
- offset < self.debug_info_loc.size,
- "Offset '0x%x' to debug_info out of section bounds" % offset)
- return offset + self.debug_info_loc.offset
-
- def _parse_CUs(self):
- """ Parse CU entries from debug_info.
- """
- offset = self.debug_info_loc.offset
- section_boundary = self.debug_info_loc.offset + self.debug_info_loc.size
- CUlist = []
- while offset < section_boundary:
- # Section 7.4 (32-bit and 64-bit DWARF Formats) of the DWARF spec v3
- # states that the first 32-bit word of the CU header determines
- # whether the CU is represented with 32-bit or 64-bit DWARF format.
- #
- # So we peek at the first word in the CU header to determine its
- # dwarf format. Based on it, we then create a new DWARFStructs
- # instance suitable for this CU and use it to parse the rest.
- #
- initial_length = struct_parse(
- self.structs.Dwarf_uint32(''), self.stream, offset)
- if initial_length == 0xFFFFFFFF:
- self.dwarf_format = 64
- cu_structs = DWARFStructs(
- little_endian=self.little_endian,
- dwarf_format=self.dwarf_format)
-
- cu_header = struct_parse(
- cu_structs.Dwarf_CU_header, self.stream, offset)
- cu_die_offset = self.stream.tell()
- dwarf_assert(
- self._is_supported_version(cu_header['version']),
- "Expected supported DWARF version. Got '%s'" % cu_header['version'])
- CUlist.append(CompileUnit(
+ self._is_supported_version(cu_header['version']),
+ "Expected supported DWARF version. Got '%s'" % cu_header['version'])
+ return CompileUnit(
header=cu_header,
dwarfinfo=self,
structs=cu_structs,
- cu_die_offset=cu_die_offset))
- # Compute the offset of the next CU in the section. The unit_length
- # field of the CU header contains its size not including the length
- # field itself.
- offset = ( offset +
- cu_header['unit_length'] +
- cu_structs.initial_lenght_field_size())
- return CUlist
-
+ cu_offset=offset,
+ cu_die_offset=cu_die_offset)
+
def _is_supported_version(self, version):
""" DWARF version supported by this parser
"""
- return 2 <= version <= 3
+ return 2 <= version <= 5
+
+ def _parse_line_program_at_offset(self, offset, structs):
+ """ Given an offset to the .debug_line section, parse the line program
+ starting at this offset in the section and return it.
+ structs is the DWARFStructs object used to do this parsing.
+ """
+
+ if offset in self._linetable_cache:
+ return self._linetable_cache[offset]
+
+ lineprog_header = struct_parse(
+ structs.Dwarf_lineprog_header,
+ self.debug_line_sec.stream,
+ offset)
+
+ # DWARF5: resolve names
+ def resolve_strings(self, lineprog_header, format_field, data_field):
+ if lineprog_header.get(format_field, False):
+ data = lineprog_header[data_field]
+ for field in lineprog_header[format_field]:
+ def replace_value(data, content_type, replacer):
+ for entry in data:
+ entry[content_type] = replacer(entry[content_type])
+
+ if field.form == 'DW_FORM_line_strp':
+ replace_value(data, field.content_type, self.get_string_from_linetable)
+ elif field.form == 'DW_FORM_strp':
+ replace_value(data, field.content_type, self.get_string_from_table)
+ elif field.form in ('DW_FORM_strp_sup', 'DW_FORM_GNU_strp_alt'):
+ if self.supplementary_dwarfinfo:
+ replace_value(data, field.content_type, self.supplementary_dwarfinfo.get_string_fromtable)
+ else:
+ replace_value(data, field.content_type, lambda x: str(x))
+ elif field.form in ('DW_FORM_strp_sup', 'DW_FORM_strx', 'DW_FORM_strx1', 'DW_FORM_strx2', 'DW_FORM_strx3', 'DW_FORM_strx4'):
+ raise NotImplementedError()
+
+ resolve_strings(self, lineprog_header, 'directory_entry_format', 'directories')
+ resolve_strings(self, lineprog_header, 'file_name_entry_format', 'file_names')
+
+ # DWARF5: provide compatible file/directory name arrays for legacy lineprogram consumers
+ if lineprog_header.get('directories', False):
+ lineprog_header.include_directory = tuple(d.DW_LNCT_path for d in lineprog_header.directories)
+ if lineprog_header.get('file_names', False):
+ lineprog_header.file_entry = tuple(
+ Container(**{
+ 'name':e.get('DW_LNCT_path'),
+ 'dir_index': e.get('DW_LNCT_directory_index'),
+ 'mtime': e.get('DW_LNCT_timestamp'),
+ 'length': e.get('DW_LNCT_size')})
+ for e in lineprog_header.file_names)
+
+ # Calculate the offset to the next line program (see DWARF 6.2.4)
+ end_offset = ( offset + lineprog_header['unit_length'] +
+ structs.initial_length_field_size())
+
+ lineprogram = LineProgram(
+ header=lineprog_header,
+ stream=self.debug_line_sec.stream,
+ structs=structs,
+ program_start_offset=self.debug_line_sec.stream.tell(),
+ program_end_offset=end_offset)
+
+ self._linetable_cache[offset] = lineprogram
+ return lineprogram
+
+ def parse_debugsupinfo(self):
+ """
+ Extract a filename from either .debug_sup or .gnu_debualtlink sections.
+ """
+ if self.debug_sup_sec is not None:
+ self.debug_sup_sec.stream.seek(0)
+ suplink = self.structs.Dwarf_debugsup.parse_stream(self.debug_sup_sec.stream)
+ if suplink.is_supplementary == 0:
+ return suplink.sup_filename
+ if self.gnu_debugaltlink_sec is not None:
+ self.gnu_debugaltlink_sec.stream.seek(0)
+ suplink = self.structs.Dwarf_debugaltlink.parse_stream(self.gnu_debugaltlink_sec.stream)
+ return suplink.sup_filename
+ return None
projects / pyelftools.git / blobdiff