diff options
Diffstat (limited to '')
| -rwxr-xr-x | bfd/load.py | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/bfd/load.py b/bfd/load.py index 73ff05e..791f7ee 100755 --- a/bfd/load.py +++ b/bfd/load.py @@ -84,7 +84,8 @@ class CLIArgParser(object): parser.add_argument("--reladyn", action='store_true', help=".rela.dyn entries", default=False) parser.add_argument("--relaplt", action='store_true', help=".rela.plt entries", default=False) parser.add_argument("--rodata", action='store_true', help="dump .rodata", default=False) - parser.add_argument("--disass", type=str, help="disassemblt a section") + parser.add_argument("--disass", type=str, help="disassembls a section by name in section headers") + parser.add_argument("--disassp", type=int, help="disassembls a section by index in program headers") self.args = parser.parse_args() if self.args.obj is None: raise Exception("no object file provided. please specify an object with --obj.") @@ -167,11 +168,11 @@ def ffs(offset,header_list, numbered, *args): if numbered: numbers_f.extend(range(1, len(args[-1])+1)) - max_column_width.append(max([len(repr(number)) for number in numbers_f])) + max_column_width.append(max([len(repr(number)) for number in numbers_f]) if numbers_f else 6) header_list.insert(0, "idx") for arg in args: - max_column_width.append(max([len(repr(argette)) for argette in arg])) + max_column_width.append(max([len(repr(argette)) for argette in arg]) if arg else 6) index = range(0, len(header_list)) for header, width, i in zip(header_list, max_column_width, index): @@ -1205,12 +1206,13 @@ class ELF(object): section_whole = self.so.read(byte2int(section.sh_size)) size = byte2int(section.sh_size) entsize = byte2int(section.sh_entsize) - for i in range(0, int(size/entsize)): - dummy["r_offset"] = byte2int(section_whole[i*entsize:i*entsize+step]) - dummy["r_info"] = byte2int(section_whole[i*entsize+step:i*entsize+(step*2)]) - dummy["r_addend"] = byte2int(section_whole[i*entsize+(step*2):i*entsize+(step*3)], sign=True) - to_pop.append(dummy) - dummy = {} + if entsize != 0: + for i in range(0, int(size/entsize)): + dummy["r_offset"] = byte2int(section_whole[i*entsize:i*entsize+step]) + dummy["r_info"] = byte2int(section_whole[i*entsize+step:i*entsize+(step*2)]) + dummy["r_addend"] = byte2int(section_whole[i*entsize+(step*2):i*entsize+(step*3)], sign=True) + to_pop.append(dummy) + dummy = {} def pop_rel(self, section_name, section_whole, to_pop): size = int() @@ -1438,6 +1440,17 @@ def premain(argparser): md = Cs(CS_ARCH_X86, CS_MODE_64) for i in md.disasm(bytes(code), 0x0): print(hex(i.address).ljust(7), i.mnemonic.ljust(7), i.op_str) + elif argparser.args.disassp != None: + index = argparser.args.disassp + # section not executable message + if byte2int(elf.phdr[index].p_flags) & 0x1 != 1: print("program header section is not executable but since you asked...") + header_offset = elf.phdr[index].p_offset + header_size = elf.phdr[index].p_filesz + elf.so.seek(byte2int(header_offset)) + code = elf.so.read(byte2int(header_size)) + md = Cs(CS_ARCH_X86, CS_MODE_64) + for i in md.disasm(bytes(code), 0x0): + print(hex(i.address).ljust(7), i.mnemonic.ljust(7), i.op_str) elif argparser.args.textasm: md = Cs(CS_ARCH_X86, CS_MODE_64) for i in md.disasm(bytes(elf.text_section), 0x0): |