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Flattener: 32-bit code

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Elliot Nunn 2021-10-04 10:15:11 +08:00
parent 4e08e75dd7
commit f4c4bb3564
1 changed files with 26 additions and 4 deletions
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30
FlattenSegmentedMacAppForDisassembler.py
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@ -44,11 +44,33 @@ with open(args.dest, "wb") as f:
jump_table = [] # (a5_ofs, segnum, seg_ofs) jump_table = [] # (a5_ofs, segnum, seg_ofs)
(jt_size, a5_offset_of_jt) = struct.unpack_from(">LL", jt_resource, 8) (jt_size, a5_offset_of_jt) = struct.unpack_from(">LL", jt_resource, 8)
thirtytwo = False
for jt_ofs in range(16, 16 + jt_size, 8): for jt_ofs in range(16, 16 + jt_size, 8):
ofs, be_3f3c, segnum, be_a9f0 = struct.unpack_from(">HHHH", jt_resource, jt_ofs) if jt_resource[jt_ofs : jt_ofs + 8] == b"\x00\x00\xff\xff\x00\x00\x00\x00":
if be_3f3c != 0x3F3C or be_a9f0 != 0xA9F0: thirtytwo = True
break continue
jump_table.append((jt_ofs - 16 + a5_offset_of_jt + 2, segnum, ofs + 4))
if thirtytwo:
segnum, be_a9f0, ofs = struct.unpack_from(">HHL", jt_resource, jt_ofs)
if be_a9f0 != 0xA9F0:
raise ValueError("32-bit jt")
rbyid = {r.id: r for r in resources}[segnum]
(adjust,) = struct.unpack_from(">L", r, 0x20)
# ofs += adjust
jump_table.append((jt_ofs - 16 + a5_offset_of_jt + 2, segnum, ofs))
else:
ofs, be_3f3c, segnum, be_a9f0 = struct.unpack_from(">HHHH", jt_resource, jt_ofs)
if be_3f3c != 0x3F3C or be_a9f0 != 0xA9F0:
raise ValueError("16-bit jt")
jump_table.append((jt_ofs - 16 + a5_offset_of_jt + 2, segnum, ofs + 4))
with open(args.dest + ".py", "w") as idascript: with open(args.dest + ".py", "w") as idascript: