From 975249d22e10360ed2c4c0bcea151c39d9446b0a Mon Sep 17 00:00:00 2001
From: KyleMiles <krm504@nyu.edu>
Date: Thu, 5 Jul 2018 18:28:59 -0400
Subject: Rebased so commit history is correct now

---
 python/examples/nds.py | 120 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 python/examples/nds.py

(limited to 'python/examples/nds.py')

diff --git a/python/examples/nds.py b/python/examples/nds.py
new file mode 100644
index 00000000..a99303cf
--- /dev/null
+++ b/python/examples/nds.py
@@ -0,0 +1,120 @@
+# 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.
+
+# from binaryninja import *
+from binaryninja.binaryview import BinaryView
+from binaryninja.architecture import Architecture
+from binaryninja.enums import SegmentFlag
+from binaryninja.log import log_error
+
+import struct
+import traceback
+
+# 2-3 compatibility
+from binaryninja import range
+
+
+def crc16(data):
+    crc = 0xffff
+    for ch in data:
+        crc ^= ord(ch)
+        for bit in range(0, 8):
+            if (crc & 1) == 1:
+                crc = (crc >> 1) ^ 0xa001
+            else:
+                crc >>= 1
+    return crc
+
+
+class DSView(BinaryView):
+    def __init__(self, data):
+        BinaryView.__init__(self, file_metadata = data.file, parent_view = data)
+        self.raw = data
+
+    @classmethod
+    def is_valid_for_data(self, data):
+        hdr = data.read(0, 0x160)
+        if len(hdr) < 0x160:
+            return False
+        if struct.unpack("<H", hdr[0x15e:0x160])[0] != crc16(hdr[0:0x15e]):
+            return False
+        if struct.unpack("<H", hdr[0x15c:0x15e])[0] != crc16(hdr[0xc0:0x15c]):
+            return False
+        return True
+
+    def init_common(self):
+        self.platform = Architecture["armv7"].standalone_platform
+        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.arm_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(Architecture['armv7'].standalone_platform, self.arm_entry_addr)
+            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.arm_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(Architecture['armv7'].standalone_platform, self.arm_entry_addr)
+            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.arm_entry_addr
+
+
+class DSARM9View(DSView):
+    name = "DSARM9"
+    long_name = "DS ARM9 ROM"
+
+    def init(self):
+        return self.init_arm9()
+
+
+class DSARM7View(DSView):
+    name = "DSARM7"
+    long_name = "DS ARM7 ROM"
+
+    def init(self):
+        return self.init_arm7()
+
+
+DSARM9View.register()
+DSARM7View.register()
-- 
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