def load_image_fobj(self, fobj):
"""load a BinImage from an ELF file given via file object"""
# read elf file
reader = ELFReader()
elf = reader.load(fobj)
# create bin image and assign elf file
bi = BinImage(BIN_IMAGE_TYPE_ELF)
bi.set_file_data(elf)
# walk through elf sections
sect_to_seg = {}
for sect in elf.sections:
# determine segment type
seg_type = None
name = sect.name_str
flags = 0
if name == '.text':
seg_type = SEGMENT_TYPE_CODE
elif name == '.data':
seg_type = SEGMENT_TYPE_DATA
elif name == '.rodata':
seg_type = SEGMENT_TYPE_DATA
flags = SEGMENT_FLAG_READ_ONLY
elif name == '.bss':
seg_type = SEGMENT_TYPE_BSS
# we got a segment
if seg_type is not None:
size = sect.header.size
data = sect.data
seg = Segment(seg_type, size, data, flags)
bi.add_segment(seg)
# assign section to segment
seg.set_file_data(sect)
sect_to_seg[sect] = seg
# now run through segments to add relocations
bi_segs = bi.get_segments()
for seg in bi_segs:
# retrieve associated ELF section
sect = seg.get_file_data()
# any relocations?
rela = sect.get_rela()
num_rela = len(rela)
if num_rela > 0:
self.add_elf_rela(sect, seg, sect_to_seg)
# any symbols?
symbols = sect.get_symbols()
num_syms = len(symbols)
if num_syms > 0:
self.add_elf_symbols(symbols, seg)
# try to add debug info
ddl = DwarfDebugLine()
got = ddl.decode(elf)
if got:
self.add_debug_line(ddl, bi, sect_to_seg)
return bi
for rela in rela_sect.get_relocations():
self._dump_rela_entry(rela, prefix="%4d " % num)
num += 1
def dump_relas_by_sect(self):
print "ELF Relocations (by sections)"
for sect in self.elf.sections:
to_sects = sect.get_rela_sections()
if len(to_sects) > 0:
print " section", sect.idx
for to_sect in to_sects:
print " -> section", to_sect.idx
num = 0
for rela in sect.get_rela_by_section(to_sect):
self._dump_rela_entry(rela, prefix=" %4d " % num)
num += 1
if __name__ == '__main__':
from ELFReader import ELFReader
import sys
reader = ELFReader()
for a in sys.argv[1:]:
f = open(a, "rb")
ef = reader.load(f)
dumper = ELFDumper(ef)
dumper.dump_sections(True, True)
dumper.dump_symbols()
dumper.dump_relas()
dumper.dump_relas_by_sect()
txt, sym.name_str)
def dump_relas(self):
print "ELF Relocations"
rela_sects = self.elf.relas
if len(rela_sects) == 0:
print "no relocations"
return
for rela_sect in rela_sects:
print rela_sect.name_str, "linked to", rela_sect.reloc_section.name_str
print " offset type segment + addend symbol + addend"
num = 0
for rela in rela_sect.get_relocations():
self._dump_rela_entry(rela, prefix="%4d " % num)
num += 1
if __name__ == '__main__':
from ELFReader import ELFReader
import sys
reader = ELFReader()
for a in sys.argv[1:]:
f = open(a, "rb")
ef = reader.load(f)
dumper = ELFDumper(ef)
dumper.dump_sections(True, True)
dumper.dump_symbols()
dumper.dump_relas()
