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Make the exception dump parser output the disassembly of the dumped code (when it's possible)

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TuxSH 2016-10-06 00:16:21 +02:00
parent bd6c7b7fdb
commit 1ad600c81a
1 changed files with 41 additions and 19 deletions
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60
exceptions/exception_dump_parser.py
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@ -22,9 +22,9 @@
# Notices displayed by works containing it. # Notices displayed by works containing it.
__author__ = "TuxSH" __author__ = "TuxSH"
__copyright__ = "Copyright (c) 2016 TuxSH" __copyright__ = "Copyright (c) 2016 TuxSH"
__license__ = "GPLv3" __license__ = "GPLv3"
__version__ = "v1.0" __version__ = "v1.2"
""" """
Parses Luma3DS exception dumps Parses Luma3DS exception dumps
@ -33,6 +33,9 @@ Parses Luma3DS exception dumps
import argparse import argparse
from struct import unpack_from from struct import unpack_from
import os
import subprocess
# Source of hexdump: https://gist.github.com/ImmortalPC/c340564823f283fe530b # Source of hexdump: https://gist.github.com/ImmortalPC/c340564823f283fe530b
# Credits for hexdump go to the original authors # Credits for hexdump go to the original authors
# Slightly edited by TuxSH # Slightly edited by TuxSH
@ -76,14 +79,14 @@ def hexdump(addr, src, length=16, sep='.' ):
text += chr(c) text += chr(c)
else: else:
text += sep text += sep
result.append(('%08X: %-'+str(length*(2+1)+1)+'s |%s|') % (addr + i, hexa, text)) result.append(('%08x: %-'+str(length*(2+1)+1)+'s |%s|') % (addr + i, hexa, text))
return '\n'.join(result) return '\n'.join(result)
def makeRegisterLine(A, rA, B, rB): 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)) 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") 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") 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)") svcBreakReasons = ("(svcBreak: panic)", "(svcBreak: assertion failed)", "(svcBreak: user-related)")
@ -96,23 +99,24 @@ if __name__ == "__main__":
with open(args.filename, "rb") as f: data = f.read() with open(args.filename, "rb") as f: data = f.read()
if unpack_from("<2I", data) != (0xdeadc0de, 0xdeadcafe): if unpack_from("<2I", data) != (0xdeadc0de, 0xdeadcafe):
raise SystemExit("Invalid file format") raise SystemExit("Invalid file format")
version, processor, exceptionType, _, nbRegisters, codeDumpSize, stackDumpSize, additionalDataSize = unpack_from("<8I", data, 8) version, processor, exceptionType, _, nbRegisters, codeDumpSize, stackDumpSize, additionalDataSize = unpack_from("<8I", data, 8)
nbRegisters //= 4 nbRegisters //= 4
if version < (1 << 16) | 2: if version < (1 << 16) | 2:
raise SystemExit("Incompatible format version, please use the appropriate parser.") raise SystemExit("Incompatible format version, please use the appropriate parser.")
registers = unpack_from("<{0}I".format(nbRegisters), data, 40) registers = unpack_from("<{0}I".format(nbRegisters), data, 40)
codeDump = data[40 + 4 * nbRegisters : 40 + 4 * nbRegisters + codeDumpSize] codeOffset = 40 + 4 * nbRegisters
stackOffset = 40 + 4 * nbRegisters + codeDumpSize codeDump = data[codeOffset : codeOffset + codeDumpSize]
stackOffset = codeOffset + codeDumpSize
stackDump = data[stackOffset : stackOffset + stackDumpSize] stackDump = data[stackOffset : stackOffset + stackDumpSize]
addtionalDataOffset = stackOffset + stackDumpSize addtionalDataOffset = stackOffset + stackDumpSize
additionalData = data[addtionalDataOffset : addtionalDataOffset + additionalDataSize] additionalData = data[addtionalDataOffset : addtionalDataOffset + additionalDataSize]
if processor == 9: print("Processor: ARM9") if processor == 9: print("Processor: ARM9")
else: print("Processor: ARM11 (core {0})".format(processor >> 16)) else: print("Processor: ARM11 (core {0})".format(processor >> 16))
typeDetailsStr = "" typeDetailsStr = ""
if exceptionType == 2: if exceptionType == 2:
if (registers[16] & 0x20) == 0 and codeDumpSize >= 4: if (registers[16] & 0x20) == 0 and codeDumpSize >= 4:
@ -125,23 +129,41 @@ if __name__ == "__main__":
instr = unpack_from("<I", codeDump[-4:])[0] instr = unpack_from("<I", codeDump[-4:])[0]
if instr == 0xdf3c: if instr == 0xdf3c:
typeDetailsStr = " " + (svcBreakReasons[registers[0]] if registers[0] < 3 else "(svcBreak)") typeDetailsStr = " " + (svcBreakReasons[registers[0]] if registers[0] < 3 else "(svcBreak)")
elif processor != 9 and (registers[20] & 0x80000000) != 0: elif processor != 9 and (registers[20] & 0x80000000) != 0:
typeDetailsStr = " (VFP exception)" typeDetailsStr = " (VFP exception)"
print("Exception type: {0}{1}".format("unknown" if exceptionType >= len(handledExceptionNames) else handledExceptionNames[exceptionType], typeDetailsStr)) print("Exception type: {0}{1}".format("unknown" if exceptionType >= len(handledExceptionNames) else handledExceptionNames[exceptionType], typeDetailsStr))
if additionalDataSize != 0: if additionalDataSize != 0:
print("Current process: {0} ({1:016x})".format(additionalData[:8].decode("ascii"), unpack_from("<Q", additionalData, 8)[0])) print("Current process: {0} ({1:016x})".format(additionalData[:8].decode("ascii"), unpack_from("<Q", additionalData, 8)[0]))
print("\nRegister dump:\n") print("\nRegister dump:\n")
for i in range(0, nbRegisters - (nbRegisters % 2), 2): for i in range(0, nbRegisters - (nbRegisters % 2), 2):
if i == 16: print("") if i == 16: print("")
print(makeRegisterLine(registerNames[i], registers[i], registerNames[i+1], registers[i+1])) 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 nbRegisters % 2 == 1: print("{0:<15}{1:<20}".format(registerNames[nbRegisters - 1], "{0:08x}".format(registers[nbRegisters - 1])))
thumb = registers[16] & 0x20 != 0
addr = registers[15] - codeDumpSize + (2 if thumb else 4)
print("\nCode dump:\n") print("\nCode dump:\n")
print(hexdump(registers[15] - codeDumpSize + (4 if (registers[16] & 0x20 == 0) else 2), codeDump))
objdump_res = ""
try:
path = os.path.join(os.environ["DEVKITARM"], "bin", "arm-none-eabi-objdump")
if os.name == "nt":
path = ''.join((path[1], ':', path[2:])).replace('/', '\\')
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("\nStack dump:\n")
print(hexdump(registers[13], stackDump)) print(hexdump(registers[13], stackDump))