111 lines
3.6 KiB
Python
Executable File
111 lines
3.6 KiB
Python
Executable File
#!/usr/bin/env python3
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import argparse
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import macresources
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import sys
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import struct
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import string
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parser = argparse.ArgumentParser()
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parser.add_argument("src", help="rdump file")
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parser.add_argument("dest", help="binary dest (may also create .txt file)")
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args = parser.parse_args()
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with open(args.src, "rb") as f:
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d = f.read()
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if f.name.endswith(".rdump"):
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resources = list(macresources.parse_rez_code(d, original_file=f.name))
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else:
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resources = list(macresources.parse_file(d))
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resources = [r for r in resources if r.type == b"CODE" and r.id >= 0]
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resources.sort(key=lambda r: r.id)
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if not resources or resources[0].id != 0:
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sys.exit("CODE 0 not found in %s" % args.src)
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jt_resource, *other_resources = resources
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bigboy = bytearray()
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for i, r in enumerate(resources):
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if i == 0:
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continue
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while len(bigboy) < i * 0x100000:
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bigboy.append(0)
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bigboy.extend(r)
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with open(args.dest, "wb") as f:
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f.write(bigboy)
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with open(args.dest + ".py", "w") as idascript:
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# Find MacsBug symbols
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namedict = {}
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for b in range(0, len(bigboy), 2):
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if bigboy[b : b + 2] == b"NV": # link a6, starting a compiled function
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for c in range(b + 2, len(bigboy), 2):
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if bigboy[c : c + 2] == b"NV":
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break
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if 0x81 <= bigboy[c] < 0xB0:
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strlen = bigboy[c] & 0x0F
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if strlen < 2:
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break
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namestr = bigboy[c + 1 : c + 1 + strlen]
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if len(namestr) < strlen:
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break
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namestr = namestr.decode("latin-1")
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if not all(c in (string.ascii_letters + string.digits + "_") for c in namestr):
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break
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if strlen % 2 == 0 and bigboy[c + 1 + strlen : c + 1 + strlen + 1] not in b"\0":
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break
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namedict[b] = namestr
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break
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# Make some neat names for the segments...
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segnames = {}
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for r in other_resources:
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if r.name:
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segnames[r.id] = "".join(c for c in r.name if c in (string.ascii_letters + string.digits))
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else:
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segnames[r.id] = f"seg_{r.id:X}"
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jt_size, a5_offset_of_jt = struct.unpack_from(">LL", jt_resource, 8)
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for jt_ofs in range(16, 16 + jt_size, 8):
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ofs, be_3f3c, segnum, be_a9f0 = struct.unpack_from(">HHHH", jt_resource, jt_ofs)
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if be_3f3c != 0x3F3C or be_a9f0 != 0xA9F0:
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break
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ofs += 4 # not sure what the leading stuff is?
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bigboy_ofs = ((segnum) * 0x100000) + ofs
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a5_ofs = jt_ofs - 16 + a5_offset_of_jt + 2
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cool_name = f"{segnames[segnum]}_"
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if bigboy_ofs in namedict:
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cool_name += namedict[bigboy_ofs]
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del namedict[bigboy_ofs]
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else:
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cool_name += f"{bigboy_ofs:X}"
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print(f'MakeFunction(0x{bigboy_ofs:X}); MakeName(0x{bigboy_ofs:X}, "{cool_name}")', file=idascript)
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call_to_me = struct.pack(">H", a5_ofs)
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bb_i = -1
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while 1:
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bb_i = bigboy.find(call_to_me, bb_i + 1)
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if bb_i == -1:
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break
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if bb_i % 2:
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continue
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if bigboy[bb_i - 2 : bb_i] not in (b"\x4e\xad", b"\x48\x6d"):
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continue # jsr/pea
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# Okay, found one
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print(f'MakeCode(0x{bb_i-2:X}); op_man(0x{bb_i-2:X}, 0, "{cool_name}")', file=idascript)
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for bigboy_ofs, name in sorted(namedict.items()):
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cool_name = f"{segnames[bigboy_ofs >> 20]}_{name}"
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print(f'MakeFunction(0x{bigboy_ofs:X}); MakeName(0x{bigboy_ofs:X}, "{cool_name}")', file=idascript)
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