Created
June 30, 2024 17:41
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Actual working Binary Ninja NDS plugin
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# Copyright (c) 2015-2024 Vector 35 Inc | |
# | |
# Permission is hereby granted, free of charge, to any person obtaining a copy | |
# of this software and associated documentation files (the "Software"), to | |
# deal in the Software without restriction, including without limitation the | |
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or | |
# sell copies of the Software, and to permit persons to whom the Software is | |
# furnished to do so, subject to the following conditions: | |
# | |
# The above copyright notice and this permission notice shall be included in | |
# all copies or substantial portions of the Software. | |
# | |
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
# IN THE SOFTWARE. | |
from binaryninja import * | |
import struct | |
import traceback | |
def crc16(data): | |
crc = 0xffff | |
for ch in data: | |
crc ^= ch | |
for bit in range(0, 8): | |
if (crc & 1) == 1: | |
crc = (crc >> 1) ^ 0xa001 | |
else: | |
crc >>= 1 | |
return crc | |
class DSView(BinaryView): | |
name = "NDS" | |
long_name = "Nintendo DS" | |
def __init__(self, parent): | |
BinaryView.__init__(self, file_metadata = parent.file, parent_view = parent) | |
self.raw = parent | |
@staticmethod | |
def is_valid_for_data(data): | |
hdr = data.read(0, 0x160) | |
if len(hdr) < 0x160: | |
return False | |
if struct.unpack("<H", hdr[0x15e:0x160])[0] != crc16(hdr[0:0x15e]): | |
print("CRC check failed, are you sure your header/ROM is valid?") | |
return False | |
if struct.unpack("<H", hdr[0x15c:0x15e])[0] != crc16(hdr[0xc0:0x15c]): | |
print("CRC check failed, are you sure your header/ROM is valid?") | |
return False | |
return True | |
def init_common(self): | |
self.arch = Architecture["armv7"] | |
self.platform = Architecture["armv7"].standalone_platform # type: ignore | |
self.hdr = self.raw.read(0, 0x160) | |
def init_arm9(self): | |
try: | |
self.init_common() | |
self.arm9_offset = struct.unpack("<L", self.hdr[0x20:0x24])[0] | |
self.arm9_entry_addr = struct.unpack("<L", self.hdr[0x24:0x28])[0] | |
self.arm9_load_addr = struct.unpack("<L", self.hdr[0x28:0x2C])[0] | |
self.arm9_size = struct.unpack("<L", self.hdr[0x2C:0x30])[0] | |
self.add_auto_segment( | |
self.arm9_load_addr, self.arm9_size, self.arm9_offset, self.arm9_size, | |
SegmentFlag.SegmentReadable | SegmentFlag.SegmentExecutable | |
) | |
self.add_entry_point(self.arm9_entry_addr) | |
self.add_function(self.arm9_entry_addr) | |
self.define_auto_symbol(Symbol(SymbolType.FunctionSymbol, self.arm9_entry_addr, "_start9")) | |
return True | |
except: | |
log_error(traceback.format_exc()) | |
return False | |
def init_arm7(self): | |
try: | |
self.init_common() | |
self.arm7_offset = struct.unpack("<L", self.hdr[0x30:0x34])[0] | |
self.arm7_entry_addr = struct.unpack("<L", self.hdr[0x34:0x38])[0] | |
self.arm7_load_addr = struct.unpack("<L", self.hdr[0x38:0x3C])[0] | |
self.arm7_size = struct.unpack("<L", self.hdr[0x3C:0x40])[0] | |
self.add_auto_segment( | |
self.arm7_load_addr, self.arm7_size, self.arm7_offset, self.arm7_size, | |
SegmentFlag.SegmentReadable | SegmentFlag.SegmentExecutable | |
) | |
self.add_entry_point(self.arm7_entry_addr) # type: ignore | |
self.add_function(self.arm7_entry_addr) | |
self.define_auto_symbol(Symbol(SymbolType.FunctionSymbol, self.arm7_entry_addr, "_start7")) | |
return True | |
except: | |
log_error(traceback.format_exc()) | |
return False | |
def perform_is_executable(self): | |
return True | |
def perform_get_entry_point(self): | |
return self.arm9_entry_addr | |
def perform_get_address_size(self): | |
return 4 | |
def init(self): | |
return self.init_arm9() and self.init_arm7() | |
DSView.register() |
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