Made depfixer work in 32 bit envs too.
This commit is contained in:
Jussi Pakkanen
parent
7b2caafd49
commit
5dc2d16615
95
depfixer.py
95
depfixer.py
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@ -23,37 +23,82 @@ DT_RPATH = 15
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DT_STRTAB = 5
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DT_SONAME = 14
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def init_datasizes(self):
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self.Half = 'h'
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self.HalfSize = 2
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self.Word = 'I'
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self.WordSize = 4
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self.Sword = 'i'
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self.SwordSize = 4
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if sys.maxsize > 2**32:
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self.Addr = 'Q'
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self.AddrSize = 8
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self.Off = 'Q'
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self.OffSize = 8
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self.XWord = 'Q'
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self.XWordSize = 8
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self.Sxword = 'q'
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self.SxwordSize = 8
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else:
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self.Addr = 'I'
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self.AddrSize = 4
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self.Off = 'I'
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self.OffSize = 4
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class DynamicEntry():
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def __init__(self, ifile):
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self.d_tag = struct.unpack('Q', ifile.read(8))[0];
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self.val = struct.unpack('Q', ifile.read(8))[0];
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init_datasizes(self)
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if sys.maxsize > 2**32:
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self.d_tag = struct.unpack(self.Sxword, ifile.read(self.SxwordSize))[0];
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self.val = struct.unpack(self.Xword, ifile.read(self.XwordSize))[0];
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else:
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self.d_tag = struct.unpack(self.Sword, ifile.read(self.SwordSize))[0]
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self.val = struct.unpack(self.Word, ifile.read(self.WordSize))[0]
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class SectionHeader():
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def __init__(self, ifile):
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init_datasizes(self)
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if sys.maxsize > 2**32:
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is_64 = True
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else:
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is_64 = False
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#Elf64_Word
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self.sh_name = struct.unpack('I', ifile.read(4))[0];
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self.sh_name = struct.unpack(self.Word, ifile.read(self.WordSize))[0];
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#Elf64_Word
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self.sh_type = struct.unpack('I', ifile.read(4))[0]
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self.sh_type = struct.unpack(self.Word, ifile.read(self.WordSize))[0]
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#Elf64_Xword
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self.sh_flags = struct.unpack('Q', ifile.read(8))[0];
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if is_64:
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self.sh_flags = struct.unpack(self.Xword, ifile.read(self.XwordSize))[0]
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else:
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self.sh_flags = struct.unpack(self.Word, ifile.read(self.WordSize))[0]
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#Elf64_Addr
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self.sh_addr = struct.unpack('Q', ifile.read(8))[0];
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self.sh_addr = struct.unpack(self.Addr, ifile.read(self.AddrSize))[0];
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#Elf64_Off
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self.sh_offset = struct.unpack('Q', ifile.read(8))[0]
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self.sh_offset = struct.unpack(self.Off, ifile.read(self.OffSize))[0]
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#Elf64_Xword
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self.sh_size = struct.unpack('Q', ifile.read(8))[0];
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if is_64:
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self.sh_size = struct.unpack(self.XWord, ifile.read(self.XWordSize))[0]
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else:
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self.sh_size = struct.unpack(self.Word, ifile.read(self.WordSize))[0]
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#Elf64_Word
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self.sh_link = struct.unpack('I', ifile.read(4))[0];
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self.sh_link = struct.unpack(self.Word, ifile.read(self.WordSize))[0];
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#Elf64_Word
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self.sh_info = struct.unpack('I', ifile.read(4))[0];
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self.sh_info = struct.unpack(self.Word, ifile.read(self.WordSize))[0];
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#Elf64_Xword
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self.sh_addralign = struct.unpack('Q', ifile.read(8))[0];
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if is_64:
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self.sh_addralign = struct.unpack(self.XWord, ifile.read(self.XWordSize))[0]
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else:
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self.sh_addralign = struct.unpack(self.Word, ifile.read(self.WordSize))[0]
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#Elf64_Xword
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self.sh_entsize = struct.unpack('Q', ifile.read(8))[0];
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if is_64:
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self.sh_entsize = struct.unpack(self.XWord, ifile.read(self.XWordSize))[0]
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else:
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self.sh_entsize = struct.unpack(self.Word, ifile.read(self.WordSize))[0]
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class Elf():
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def __init__(self, bfile):
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init_datasizes(self)
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self.bfile = bfile
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self.bf = open(bfile, 'r+b')
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self.parse_header()
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@ -65,19 +110,19 @@ class Elf():
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if self.e_ident[1:4] != b'ELF':
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print('File "%s" is not an ELF file.' % self.bfile)
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sys.exit(0)
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self.e_type = struct.unpack('h', self.bf.read(2))[0]
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self.e_machine = struct.unpack('h', self.bf.read(2))[0]
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self.e_version = struct.unpack('i', self.bf.read(4))[0]
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self.e_entry = struct.unpack('Q', self.bf.read(8))[0]
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self.e_phoff = struct.unpack('Q', self.bf.read(8))[0]
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self.e_shoff = struct.unpack('Q', self.bf.read(8))[0]
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self.e_flags = struct.unpack('i', self.bf.read(4))[0]
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self.e_ehsize = struct.unpack('h', self.bf.read(2))[0]
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self.e_phentsize = struct.unpack('h', self.bf.read(2))[0]
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self.e_phnum = struct.unpack('h', self.bf.read(2))[0]
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self.e_shentsize = struct.unpack('h', self.bf.read(2))[0]
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self.e_shnum = struct.unpack('h', self.bf.read(2))[0]
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self.e_shstrndx = struct.unpack('h', self.bf.read(2))[0]
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self.e_type = struct.unpack(self.Half, self.bf.read(self.HalfSize))[0]
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self.e_machine = struct.unpack(self.Half, self.bf.read(self.HalfSize))[0]
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self.e_version = struct.unpack(self.Word, self.bf.read(self.WordSize))[0]
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self.e_entry = struct.unpack(self.Addr, self.bf.read(self.AddrSize))[0]
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self.e_phoff = struct.unpack(self.Off, self.bf.read(self.OffSize))[0]
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self.e_shoff = struct.unpack(self.Off, self.bf.read(self.OffSize))[0]
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self.e_flags = struct.unpack(self.Word, self.bf.read(self.WordSize))[0]
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self.e_ehsize = struct.unpack(self.Half, self.bf.read(self.HalfSize))[0]
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self.e_phentsize = struct.unpack(self.Half, self.bf.read(self.HalfSize))[0]
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self.e_phnum = struct.unpack(self.Half, self.bf.read(self.HalfSize))[0]
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self.e_shentsize = struct.unpack(self.Half, self.bf.read(self.HalfSize))[0]
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self.e_shnum = struct.unpack(self.Half, self.bf.read(self.HalfSize))[0]
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self.e_shstrndx = struct.unpack(self.Half, self.bf.read(self.HalfSize))[0]
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def parse_sections(self):
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self.bf.seek(self.e_shoff)
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