diff options
Diffstat (limited to 'test/Scripts/elf-dump')
| -rwxr-xr-x | test/Scripts/elf-dump | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/test/Scripts/elf-dump b/test/Scripts/elf-dump new file mode 100755 index 0000000..76cdbf9 --- /dev/null +++ b/test/Scripts/elf-dump @@ -0,0 +1,231 @@ +#!/usr/bin/env python + +import struct +import sys +import StringIO + +import common_dump + +class Reader: + def __init__(self, path): + if path == "-": + # Snarf all the data so we can seek. + self.file = StringIO.StringIO(sys.stdin.read()) + else: + self.file = open(path, "rb") + self.isLSB = None + self.is64Bit = None + + def seek(self, pos): + self.file.seek(pos) + + def read(self, N): + data = self.file.read(N) + if len(data) != N: + raise ValueError, "Out of data!" + return data + + def read8(self): + return ord(self.read(1)) + + def read16(self): + return struct.unpack('><'[self.isLSB] + 'H', self.read(2))[0] + + def read32(self): + return struct.unpack('><'[self.isLSB] + 'I', self.read(4))[0] + + def read32S(self): + return struct.unpack('><'[self.isLSB] + 'i', self.read(4))[0] + + def read64(self): + return struct.unpack('><'[self.isLSB] + 'Q', self.read(8))[0] + + def read64S(self): + return struct.unpack('><'[self.isLSB] + 'q', self.read(8))[0] + + def readWord(self): + if self.is64Bit: + return self.read64() + else: + return self.read32() + + def readWordS(self): + if self.is64Bit: + return self.read64S() + else: + return self.read32S() + +class StringTable: + def __init__(self, strings): + self.string_table = strings + + def __getitem__(self, index): + end = self.string_table.index('\x00', index) + return self.string_table[index:end] + +class Section: + def __init__(self, f): + self.sh_name = f.read32() + self.sh_type = f.read32() + self.sh_flags = f.readWord() + self.sh_addr = f.readWord() + self.sh_offset = f.readWord() + self.sh_size = f.readWord() + self.sh_link = f.read32() + self.sh_info = f.read32() + self.sh_addralign = f.readWord() + self.sh_entsize = f.readWord() + + def dump(self, shstrtab, f, strtab, dumpdata): + print " (('sh_name', %s)" % common_dump.HexDump(self.sh_name), "# %r" % shstrtab[self.sh_name] + print " ('sh_type', %s)" % common_dump.HexDump(self.sh_type) + print " ('sh_flags', %s)" % common_dump.HexDump(self.sh_flags) + print " ('sh_addr', %s)" % common_dump.HexDump(self.sh_addr) + print " ('sh_offset', %s)" % common_dump.HexDump(self.sh_offset) + print " ('sh_size', %s)" % common_dump.HexDump(self.sh_size) + print " ('sh_link', %s)" % common_dump.HexDump(self.sh_link) + print " ('sh_info', %s)" % common_dump.HexDump(self.sh_info) + print " ('sh_addralign', %s)" % common_dump.HexDump(self.sh_addralign) + print " ('sh_entsize', %s)" % common_dump.HexDump(self.sh_entsize) + if self.sh_type == 2: # SHT_SYMTAB + print " ('_symbols', [" + dumpSymtab(f, self, strtab) + print " ])" + elif self.sh_type == 4 or self.sh_type == 9: # SHT_RELA / SHT_REL + print " ('_relocations', [" + dumpRel(f, self, self.sh_type == 4) + print " ])" + elif dumpdata: + f.seek(self.sh_offset) + if self.sh_type != 8: # != SHT_NOBITS + data = f.read(self.sh_size) + print " ('_section_data', '%s')" % common_dump.dataToHex(data) + else: + print " ('_section_data', '')" + print " )," + +def dumpSymtab(f, section, strtab): + entries = section.sh_size // section.sh_entsize + + for index in range(entries): + f.seek(section.sh_offset + index * section.sh_entsize) + print " # Symbol %s" % common_dump.HexDump(index) + name = f.read32() + print " (('st_name', %s)" % common_dump.HexDump(name), "# %r" % strtab[name] + if not f.is64Bit: + print " ('st_value', %s)" % common_dump.HexDump(f.read32()) + print " ('st_size', %s)" % common_dump.HexDump(f.read32()) + st_info = f.read8() + print " ('st_bind', %s)" % common_dump.HexDump((st_info >> 4)) + print " ('st_type', %s)" % common_dump.HexDump((st_info & 0xf)) + print " ('st_other', %s)" % common_dump.HexDump(f.read8()) + print " ('st_shndx', %s)" % common_dump.HexDump(f.read16()) + if f.is64Bit: + print " ('st_value', %s)" % common_dump.HexDump(f.read64(), 64) + print " ('st_size', %s)" % common_dump.HexDump(f.read64(), 64) + print " )," + +def dumpRel(f, section, dumprela = False): + entries = section.sh_size // section.sh_entsize + + for index in range(entries): + f.seek(section.sh_offset + index * section.sh_entsize) + print " # Relocation %s" % common_dump.HexDump(index) + print " (('r_offset', %s)" % common_dump.HexDump(f.readWord()) + r_info = f.readWord() + if f.is64Bit: + print " ('r_sym', %s)" % common_dump.HexDump((r_info >> 32)) + print " ('r_type', %s)" % common_dump.HexDump((r_info & 0xffffffff)) + else: + print " ('r_sym', %s)" % common_dump.HexDump((r_info >> 8)) + print " ('r_type', %s)" % common_dump.HexDump((r_info & 0xff)) + if dumprela: + print " ('r_addend', %s)" % common_dump.HexDump(f.readWordS()) + print " )," + +def dumpELF(path, opts): + f = Reader(path) + + magic = f.read(4) + assert magic == '\x7FELF' + + fileclass = f.read8() + if fileclass == 1: # ELFCLASS32 + f.is64Bit = False + elif fileclass == 2: # ELFCLASS64 + f.is64Bit = True + else: + raise ValueError, "Unknown file class %s" % common_dump.HexDump(fileclass) + print "('e_indent[EI_CLASS]', %s)" % common_dump.HexDump(fileclass) + + byteordering = f.read8() + if byteordering == 1: # ELFDATA2LSB + f.isLSB = True + elif byteordering == 2: # ELFDATA2MSB + f.isLSB = False + else: + raise ValueError, "Unknown byte ordering %s" % common_dump.HexDump(byteordering) + print "('e_indent[EI_DATA]', %s)" % common_dump.HexDump(byteordering) + + print "('e_indent[EI_VERSION]', %s)" % common_dump.HexDump(f.read8()) + print "('e_indent[EI_OSABI]', %s)" % common_dump.HexDump(f.read8()) + print "('e_indent[EI_ABIVERSION]', %s)" % common_dump.HexDump(f.read8()) + + f.seek(16) # Seek to end of e_ident. + + print "('e_type', %s)" % common_dump.HexDump(f.read16()) + print "('e_machine', %s)" % common_dump.HexDump(f.read16()) + print "('e_version', %s)" % common_dump.HexDump(f.read32()) + print "('e_entry', %s)" % common_dump.HexDump(f.readWord()) + print "('e_phoff', %s)" % common_dump.HexDump(f.readWord()) + e_shoff = f.readWord() + print "('e_shoff', %s)" % common_dump.HexDump(e_shoff) + print "('e_flags', %s)" % common_dump.HexDump(f.read32()) + print "('e_ehsize', %s)" % common_dump.HexDump(f.read16()) + print "('e_phentsize', %s)" % common_dump.HexDump(f.read16()) + print "('e_phnum', %s)" % common_dump.HexDump(f.read16()) + e_shentsize = f.read16() + print "('e_shentsize', %s)" % common_dump.HexDump(e_shentsize) + e_shnum = f.read16() + print "('e_shnum', %s)" % common_dump.HexDump(e_shnum) + e_shstrndx = f.read16() + print "('e_shstrndx', %s)" % common_dump.HexDump(e_shstrndx) + + # Read all section headers + sections = [] + for index in range(e_shnum): + f.seek(e_shoff + index * e_shentsize) + s = Section(f) + sections.append(s) + + # Read .shstrtab so we can resolve section names + f.seek(sections[e_shstrndx].sh_offset) + shstrtab = StringTable(f.read(sections[e_shstrndx].sh_size)) + + # Get the symbol string table + strtab = None + for section in sections: + if shstrtab[section.sh_name] == ".strtab": + f.seek(section.sh_offset) + strtab = StringTable(f.read(section.sh_size)) + break + + print "('_sections', [" + for index in range(e_shnum): + print " # Section %s" % common_dump.HexDump(index) + sections[index].dump(shstrtab, f, strtab, opts.dumpSectionData) + print "])" + +if __name__ == "__main__": + from optparse import OptionParser, OptionGroup + parser = OptionParser("usage: %prog [options] {files}") + parser.add_option("", "--dump-section-data", dest="dumpSectionData", + help="Dump the contents of sections", + action="store_true", default=False) + (opts, args) = parser.parse_args() + + if not args: + args.append('-') + + for arg in args: + dumpELF(arg, opts) |
