Luma3DSv10.0.1.zip

#!/usr/bin/env python # Requires Python >= 3.2 or >= 2.7 # This file is part of Luma3DS # Copyright (C) 2016-2019 Aurora Wright, TuxSH # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. # # Additional Terms 7.b of GPLv3 applies to this file: Requiring preservation of specified # reasonable legal notices or author attributions in that material or in the Appropriate Legal # Notices displayed by works containing it. __author__ = "TuxSH" __copyright__ = "Copyright (c) 2016 TuxSH" __license__ = "GPLv3" __version__ = "v1.2" """ Parses Luma3DS exception dumps """ import argparse from struct import unpack_from import os import subprocess # Source of hexdump: https://gist.github.com/ImmortalPC/c340564823f283fe530b # Credits for hexdump go to the original authors # Slightly edited by TuxSH def hexdump(addr, src, length=16, sep='.' ): ''' @brief Return {src} in hex dump. @param[in] length {Int} Nb Bytes by row. @param[in] sep {Char} For the text part, {sep} will be used for non ASCII char. @return {Str} The hexdump @note Full support for python2 and python3 ! ''' result = [] # Python3 support try: xrange(0,1) except NameError: xrange = range for i in xrange(0, len(src), length): subSrc = src[i:i+length] hexa = '' isMiddle = False for h in xrange(0,len(subSrc)): if h == length/2: hexa += ' ' h = subSrc[h] if not isinstance(h, int): h = ord(h) h = hex(h).replace('0x','') if len(h) == 1: h = '0'+h hexa += h+' ' hexa = hexa.strip(' ') text = '' for c in subSrc: if not isinstance(c, int): c = ord(c) if 0x20 <= c < 0x7F: text += chr(c) else: text += sep result.append(('%08x: %-'+str(length*(2+1)+1)+'s |%s|') % (addr + i, hexa, text)) return '\n'.join(result) def makeRegisterLine(A, rA, B, rB): return "{0:<15}{1:<20}{2:<15}{3:<20}".format(A, "{0:08x}".format(rA), B, "{0:08x}".format(rB)) handledExceptionNames = ("FIQ", "undefined instruction", "prefetch abort", "data abort") registerNames = tuple("r{0}".format(i) for i in range(13)) + ("sp", "lr", "pc", "cpsr") + ("dfsr", "ifsr", "far") + ("fpexc", "fpinst", "fpinst2") svcBreakReasons = ("(svcBreak: panic)", "(svcBreak: assertion failed)", "(svcBreak: user-related)") faultStatusSources = { 0b1:'Alignment', 0b100:'Instruction cache maintenance operation fault', 0b1100:'External Abort on translation - First-level', 0b1110:'External Abort on translation - Second-level', 0b101:'Translation - Section', 0b111:'Translation - Page', 0b11:'Access bit - Section', 0b110:'Access bit - Page', 0b1001:'Domain - Section', 0b1011:'Domain - Page', 0b1101:'Permission - Section', 0b1111:'Permission - Page', 0b1000:'Precise External Abort', 0b10110:'Imprecise External Abort', 0b10:'Debug event' } def main(args=None): parser = argparse.ArgumentParser(description="Parse Luma3DS exception dumps") parser.add_argument("filename") args = parser.parse_args() data = b"" with open(args.filename, "rb") as f: data = f.read() if unpack_from("<2I", data) != (0xdeadc0de, 0xdeadcafe): raise SystemExit("Invalid file format") version, processor, exceptionType, _, nbRegisters, codeDumpSize, stackDumpSize, additionalDataSize = unpack_from("<8I", data, 8) nbRegisters //= 4 if version < (1 << 16) | 2: raise SystemExit("Incompatible format version, please use the appropriate parser.") registers = unpack_from("<{0}I".format(nbRegisters), data, 40) codeOffset = 40 + 4 * nbRegisters codeDump = data[codeOffset : codeOffset + codeDumpSize] stackOffset = codeOffset + codeDumpSize stackDump = data[stackOffset : stackOffset + stackDumpSize] addtionalDataOffset = stackOffset + stackDumpSize additionalData = data[addtionalDataOffset : addtionalDataOffset + additionalDataSize] if processor == 9: print("Processor: ARM9") else: print("Processor: ARM11 (core {0})".format(processor >> 16)) typeDetailsStr = "" if exceptionType == 2: if (registers[16] & 0x20) == 0 and codeDumpSize >= 4: instr = unpack_from("<I", codeDump[-4:])[0] if instr == 0xe12fff7e: typeDetailsStr = " (kernel panic)" elif instr == 0xef00003c: typeDetailsStr = " " + (svcBreakReasons[registers[0]] if registers[0] < 3 else "(svcBreak)") elif (registers[16] & 0x20) == 1 and codeDumpSize >= 2: instr = unpack_from("<I", codeDump[-4:])[0] if instr == 0xdf3c: typeDetailsStr = " " + (svcBreakReasons[registers[0]] if registers[0] < 3 else "(svcBreak)") elif processor != 9 and (registers[20] & 0x80000000) != 0: typeDetailsStr = " (VFP exception)" print("Exception type: {0}{1}".format("unknown" if exceptionType >= len(handledExceptionNames) else handledExceptionNames[exceptionType], typeDetailsStr)) if processor == 11 and exceptionType >= 2: xfsr = registers[18] if exceptionType == 2 else registers[17] print("Fault status: " + faultStatusSources[xfsr & 0xf]) if additionalDataSize != 0: print("Current process: {0} ({1:016x})".format(additionalData[:8].decode("ascii"), unpack_from("<Q", additionalData, 8)[0])) print("\nRegister dump:\n") for i in range(0, nbRegisters - (nbRegisters % 2), 2): if i == 16: print("") print(makeRegisterLine(registerNames[i], registers[i], registerNames[i+1], registers[i+1])) if nbRegisters % 2 == 1: print("{0:<15}{1:<20}".format(registerNames[nbRegisters - 1], "{0:08x}".format(registers[nbRegisters - 1]))) if processor == 11 and exceptionType == 3: print("{0:<15}{1:<20}Access type: {2}".format("FAR", "{0:08x}".format(registers[19]), "Write" if registers[17] & (1 << 11) != 0 else "Read")) thumb = registers[16] & 0x20 != 0 addr = registers[15] - codeDumpSize + (2 if thumb else 4) print("\nCode dump:\n") objdump_res = "" try: path = os.path.join(os.environ["DEVKITARM"], "bin", "arm-none-eabi-objdump") if os.name == "nt" and path[0] == '/': path = ''.join((path[1], ':', path[2:])) objdump_res = subprocess.check_output(( path, "-marm", "-b", "binary", "--adjust-vma="+hex(addr - codeOffset), "--start-address="+hex(addr), "--stop-address="+hex(addr + codeDumpSize), "-D", "-z", "-M", "reg-names-std" + (",force-thumb" if thumb else ""), args.filename )).decode("utf-8") objdump_res = '\n'.join(objdump_res[objdump_res.find('<.data+'):].split('\n')[1:]) except: objdump_res = "" print(objdump_res if objdump_res != "" else hexdump(addr, codeDump)) print("\nStack dump:\n") print(hexdump(registers[13], stackDump)) if __name__ == "__main__": main()