fusee_cpp: add logic for loading mtc overlays

fusee_cpp/program/split_bin.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python
+import sys, lz4
+from struct import unpack as up
+
+def lz4_compress(data):
+    try:
+        import lz4.block as block
+    except ImportError:
+        block = lz4.LZ4_compress
+    return block.compress(data, 'high_compression', store_size=False)
+
+def read_file(fn):
+    with open(fn, 'rb') as f:
+        return f.read()
+
+def pad(data, size):
+    return (data + '\x00' * size)[:size]
+
+def get_overlay(program, i):
+    return program[0x2B000 + 0x14000 * i:0x2B000 + 0x14000 * (i+1)]
+
+def main(argc, argv):
+    if argc == 2:
+        target = argv[1]
+        if len(target) == 0:
+            target = ''
+    elif argc == 1:
+        target = ''
+    else:
+        print('Usage: %s target' % argv[0])
+        return 1
+    with open('../../program%s.bin' % target, 'rb') as f:
+        data = f.read()
+    with open('../../program%s.lz4' % target, 'wb') as f:
+        f.write(lz4_compress(data[:0x2B000] + get_overlay(data, 0)[:0x11000]))
+    with open('../../fusee-boogaloo%s.bin' % target, 'wb') as f:
+        # TODO: Write header
+        f.write('\xCC'*0x800)
+        # TODO: Write warmboot
+        f.write('\xCC'*0x1800)
+        # Write TSEC Keygen
+        f.write(pad(read_file('../../tsec_keygen/tsec_keygen.bin'), 0x2000))
+        # TODO: Write Mariko Fatal
+        f.write('\xCC'*0x1C000)
+        # Write Erista MTC
+        f.write(get_overlay(data, 1))
+        # Write Mariko MTC
+        f.write(get_overlay(data, 2))
+        # TODO: Write exosphere
+        f.write('\xCC'*0x10000)
+        # TODO: Write mesosphere
+        f.write('\xCC'*0xA8000)
+        # TODO: Write kips
+        f.write('\xCC'*0x300000)
+        # Write Splash Screen
+        f.write(pad(read_file('../../splash_screen/splash_screen.bin'), 0x3C0000))
+
+    return 0
+
+if __name__ == '__main__':
+    sys.exit(main(len(sys.argv), sys.argv))