def linker_script_segments(script):
file_ = tempfile.TemporaryFile()
file_.write(script)
file_.seek(0)
return extract_segment_names(file_)
def linker_script_segments(script):
file_ = tempfile.TemporaryFile()
file_.write(script)
file_.seek(0)
return extract_segment_names(file_)
def get_segment_names(options, elf, scripts, linker_name, orphans = []):
"""
Return a list of names that correspond to the segments in the ELF
file.
The names can come from the command line, a file, the program
headers listed in a linker script or generated from the flag
values of the segments themselves.
"""
seglist = []
if len(scripts) != 0:
scripts = scripts[0]
# segments specifed in a file
if options.file_segment_list:
segfile = open(options.file_segment_list, 'r')
seglist = pad_non_loaded(elf, segfile.readlines())
# segments specified on command line
elif options.cmd_segment_list:
seglist = pad_non_loaded(elf, options.cmd_segment_list.split(r','))
# get segments from linker script
elif len(scripts) != 0 and linker_name == "rvct":
segments_to_sections_dict = rvct_parser.extract_segment_names(scripts)
# sections may appear in more than one segment
# the correct segment in the linker script
seglist = seg_list_rvct (elf, segments_to_sections_dict)
# get segments from linker script
elif len(scripts) != 0 and linker_name == "gcc":
seglist = gnu_parser.extract_segment_names(scripts)
# If no segment names are found, then generate default names.
# Loadable segments are named according to their ELF flags. Other
# segments are unnamed because they are unused by elfweaver.
if len(seglist) == 0:
for seg in elf.segments:
seg_name = ""
if seg.has_sections():
for sect in seg.get_sections():
if sect.name in orphans:
seg_name = sect.name
if seg_name == "":
if seg.flags & PF_R:
seg_name += 'r'
if seg.flags & PF_W:
seg_name += 'w'
if seg.flags & PF_X:
seg_name += 'x'
if seg_name == "":
seg_name = "??"
seglist.append(seg_name)
return seglist
def get_segment_names(elf, seglist=None, scripts=None, linker_name=None, orphans=None):
"""
Return a list of names that correspond to the segments in the ELF
file.
The names can come from the command line, a file, the program
headers listed in a linker script or generated from the flag
values of the segments themselves.
"""
if scripts is not None and len(scripts) != 0:
scripts = scripts[0]
if orphans is None:
orphans = []
# segments specifed in a file
if seglist is not None:
seglist = _pad_non_loaded(elf, seglist)
# get segments from linker script
elif scripts is not None and len(scripts) != 0 and linker_name == "rvct":
segments_to_sections_dict = rvct_parser.extract_segment_names(scripts)
# sections may appear in more than one segment
# the correct segment in the linker script
seglist = _seg_list_rvct(elf, segments_to_sections_dict)
# get segments from linker script
elif scripts is not None and len(scripts) != 0 and linker_name == "gcc":
seglist = gnu_parser.extract_segment_names(scripts)
# otherwise we use the defaults
else:
seglist = []
# If no segment names are found, then generate default names.
# Loadable segments are named according to their ELF flags. Other
# segments are unnamed because they are unused by elfweaver.
if len(seglist) < len(elf.segments):
seglist_enum = []
segcount = 0
for seg in elf.segments[len(seglist) :]:
seg_name = ""
if seg.has_sections():
for sect in seg.get_sections():
if sect.name in orphans:
seg_name = sect.name
if seg_name == "":
if seg.flags & PF_R:
seg_name += "r"
if seg.flags & PF_W:
seg_name += "w"
if seg.flags & PF_X:
seg_name += "x"
if seg_name == "":
seg_name = "??"
seglist_enum.append((segcount, seg_name))
segcount += 1
# Find and flag all segments which have non-unique flags
counts = {}
for seg in elf.segments:
counts[seg.flags] = counts.get(seg.flags, 0) + 1
duplicates = [counts[seg.flags] > 1 for seg in elf.segments]
# For all segments which have duplicate names:
# First try to append the name of their first section
# Failing that, append their segment number
# (which is actually its position in the segment lsit)
# Finally, construct the seglist that will be returned
for i, seg_name in seglist_enum:
is_dup = duplicates[i]
if is_dup == True and seg_name not in orphans:
seg_i = elf.segments[i]
if seg_i.has_sections():
first_sect_name = seg_i.get_sections()[0].name
if first_sect_name.startswith("."):
seg_name += "-" + first_sect_name.split(".")[1]
else:
seg_name += "-" + first_sect_name
else:
seg_name += "-%02d" % i
seglist.append(seg_name)
return seglist
def get_segment_names(options, elf, scripts, linker_name, orphans=[]):
"""
Return a list of names that correspond to the segments in the ELF
file.
The names can come from the command line, a file, the program
headers listed in a linker script or generated from the flag
values of the segments themselves.
"""
seglist = []
if len(scripts) != 0:
scripts = scripts[0]
# segments specifed in a file
if options.file_segment_list:
segfile = open(options.file_segment_list, 'r')
seglist = pad_non_loaded(elf, segfile.readlines())
# segments specified on command line
elif options.cmd_segment_list:
seglist = pad_non_loaded(elf, options.cmd_segment_list.split(r','))
# get segments from linker script
elif len(scripts) != 0 and linker_name == "rvct":
segments_to_sections_dict = rvct_parser.extract_segment_names(scripts)
# sections may appear in more than one segment
# the correct segment in the linker script
seglist = seg_list_rvct(elf, segments_to_sections_dict)
# get segments from linker script
elif len(scripts) != 0 and linker_name == "gcc":
seglist = gnu_parser.extract_segment_names(scripts)
# If no segment names are found, then generate default names.
# Loadable segments are named according to their ELF flags. Other
# segments are unnamed because they are unused by elfweaver.
if len(seglist) == 0:
for seg in elf.segments:
seg_name = ""
if seg.has_sections():
for sect in seg.get_sections():
if sect.name in orphans:
seg_name = sect.name
if seg_name == "":
if seg.flags & PF_R:
seg_name += 'r'
if seg.flags & PF_W:
seg_name += 'w'
if seg.flags & PF_X:
seg_name += 'x'
if seg_name == "":
seg_name = "??"
seglist.append(seg_name)
return seglist
def get_segment_names(elf,
seglist=None,
scripts=None,
linker_name=None,
orphans=None):
"""
Return a list of names that correspond to the segments in the ELF
file.
The names can come from the command line, a file, the program
headers listed in a linker script or generated from the flag
values of the segments themselves.
"""
if scripts is not None and len(scripts) != 0:
scripts = scripts[0]
if orphans is None:
orphans = []
# segments specifed in a file
if seglist is not None:
seglist = _pad_non_loaded(elf, seglist)
# get segments from linker script
elif scripts is not None and len(scripts) != 0 and linker_name == "rvct":
segments_to_sections_dict = rvct_parser.extract_segment_names(scripts)
# sections may appear in more than one segment
# the correct segment in the linker script
seglist = _seg_list_rvct(elf, segments_to_sections_dict)
# get segments from linker script
elif scripts is not None and len(scripts) != 0 and linker_name == "gcc":
seglist = gnu_parser.extract_segment_names(scripts)
# otherwise we use the defaults
else:
seglist = []
# If no segment names are found, then generate default names.
# Loadable segments are named according to their ELF flags. Other
# segments are unnamed because they are unused by elfweaver.
if len(seglist) < len(elf.segments):
seglist_enum = []
segcount = 0
for seg in elf.segments[len(seglist):]:
seg_name = ""
if seg.has_sections():
for sect in seg.get_sections():
if sect.name in orphans:
seg_name = sect.name
if seg_name == "":
if seg.flags & PF_R:
seg_name += 'r'
if seg.flags & PF_W:
seg_name += 'w'
if seg.flags & PF_X:
seg_name += 'x'
if seg_name == "":
seg_name = "??"
seglist_enum.append((segcount, seg_name))
segcount += 1
# Find and flag all segments which have non-unique flags
counts = {}
for seg in elf.segments:
counts[seg.flags] = counts.get(seg.flags, 0) + 1
duplicates = [counts[seg.flags] > 1 for seg in elf.segments]
# For all segments which have duplicate names:
# First try to append the name of their first section
# Failing that, append their segment number
# (which is actually its position in the segment lsit)
# Finally, construct the seglist that will be returned
for i, seg_name in seglist_enum:
is_dup = duplicates[i]
if is_dup == True and seg_name not in orphans:
seg_i = elf.segments[i]
if seg_i.has_sections():
first_sect_name = seg_i.get_sections()[0].name
if first_sect_name.startswith("."):
seg_name += "-" + first_sect_name.split(".")[1]
else:
seg_name += "-" + first_sect_name
else:
seg_name += "-%02d" % i
seglist.append(seg_name)
return seglist
