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Diffstat (limited to 'python/examples/nsf.py')
| -rw-r--r-- | python/examples/nsf.py | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/python/examples/nsf.py b/python/examples/nsf.py deleted file mode 100644 index b0164065..00000000 --- a/python/examples/nsf.py +++ /dev/null @@ -1,145 +0,0 @@ -# Copyright (c) 2015-2017 Vector 35 LLC -# -# 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. -# -# -# Simple NSF file loader, primarily for analyzing: -# https://scarybeastsecurity.blogspot.com/2016/11/0day-exploit-compromising-linux-desktop.html -# - -from binaryninja.binaryview import BinaryView -from binaryninja.architecture import Architecture -from binaryninja.log import log_error, log_info -from binaryninja.types import Symbol -from binaryninja.enums import SymbolType, SegmentFlag - -import struct -import traceback - - -class NSFView(BinaryView): - name = "NSF" - long_name = "Nintendo Sound Format" - - def __init__(self, data): - BinaryView.__init__(self, parent_view=data, file_metadata=data.file) - self.platform = Architecture["6502"].standalone_platform - - @classmethod - def is_valid_for_data(self, data): - hdr = data.read(0, 128) - if len(hdr) < 128: - return False - if hdr[0:5] != "NESM\x1a": - return False - song_count = struct.unpack("B", hdr[6])[0] - if song_count < 1: - log_info("Appears to be an NSF, but no songs.") - return False - return True - - def init(self): - try: - hdr = self.parent_view.read(0, 128) - self.version = struct.unpack("B", hdr[5])[0] - self.song_count = struct.unpack("B", hdr[6])[0] - self.starting_song = struct.unpack("B", hdr[7])[0] - self.load_address = struct.unpack("<H", hdr[8:10])[0] - self.init_address = struct.unpack("<H", hdr[10:12])[0] - self.play_address = struct.unpack("<H", hdr[12:14])[0] - self.song_name = hdr[15].split('\0')[0] - self.artist_name = hdr[46].split('\0')[0] - self.copyright_name = hdr[78].split('\0')[0] - self.play_speed_ntsc = struct.unpack("<H", hdr[110:112])[0] - self.bank_switching = hdr[112:120] - self.play_speed_pal = struct.unpack("<H", hdr[120:122])[0] - self.pal_ntsc_bits = struct.unpack("B", hdr[122])[0] - self.pal = True if (self.pal_ntsc_bits & 1) == 1 else False - self.ntsc = not self.pal - if self.pal_ntsc_bits & 2 == 2: - self.pal = True - self.ntsc = True - self.extra_sound_bits = struct.unpack("B", hdr[123])[0] - - if self.bank_switching == "\0" * 8: - # no bank switching - self.load_address & 0xFFF - self.rom_offset = 128 - - else: - # bank switching not implemented - log_info("Bank switching not implemented in this loader.") - - # Add mapping for RAM and hardware registers, not backed by file contents - self.add_auto_segment(0, 0x8000, 0, 0, SegmentFlag.SegmentReadable | SegmentFlag.SegmentWritable | SegmentFlag.SegmentExecutable) - - # Add ROM mappings - self.add_auto_segment(0x8000, 0x4000, self.rom_offset, 0x4000, - SegmentFlag.SegmentReadable | SegmentFlag.SegmentExecutable) - - self.define_auto_symbol(Symbol(SymbolType.FunctionSymbol, self.play_address, "_play")) - self.define_auto_symbol(Symbol(SymbolType.FunctionSymbol, self.init_address, "_init")) - self.add_entry_point(self.init_address) - self.add_function(self.play_address) - - # Hardware registers - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x2000, "PPUCTRL")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x2001, "PPUMASK")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x2002, "PPUSTATUS")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x2003, "OAMADDR")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x2004, "OAMDATA")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x2005, "PPUSCROLL")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x2006, "PPUADDR")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x2007, "PPUDATA")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4000, "SQ1_VOL")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4001, "SQ1_SWEEP")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4002, "SQ1_LO")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4003, "SQ1_HI")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4004, "SQ2_VOL")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4005, "SQ2_SWEEP")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4006, "SQ2_LO")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4007, "SQ2_HI")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4008, "TRI_LINEAR")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x400a, "TRI_LO")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x400b, "TRI_HI")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x400c, "NOISE_VOL")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x400e, "NOISE_LO")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x400f, "NOISE_HI")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4010, "DMC_FREQ")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4011, "DMC_RAW")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4012, "DMC_START")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4013, "DMC_LEN")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4014, "OAMDMA")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4015, "SND_CHN")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4016, "JOY1")) - self.define_auto_symbol(Symbol(SymbolType.DataSymbol, 0x4017, "JOY2")) - - return True - except: - log_error(traceback.format_exc()) - return False - - def perform_is_executable(self): - return True - - def perform_get_entry_point(self): - return struct.unpack("<H", str(self.perform_read(0x0a, 2)))[0] - - -NSFView.register() |