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Factor out relocation code into method

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This commit is contained in:
Byron Lathi
2023-08-23 19:52:11 -07:00
parent cc1d8d2015
commit 9b1576774b
1 changed files with 19 additions and 28 deletions
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47
sw/script/o65dump.py
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@@ -42,34 +42,8 @@ class O65():
self.undef_ref_cnt = _file.read(2)
offset = _file.read(1)
while offset != b'\x00':
offset_val = 0
while offset == b'\xff':
offset = _file.read(1)
offset_val += int.from_bytes(offset) - 1
offset_val += int.from_bytes(offset)
typebyte = int.from_bytes(_file.read(1))
lobyte = None
if typebyte & 0x40:
lobyte = int.from_bytes(_file.read(1))
self.text_reloc.append((offset_val, typebyte, lobyte))
offset = _file.read(1)
offset = _file.read(1)
while offset != b'\x00':
offset_val = 0
while offset == b'\xff':
offset = _file.read(1)
offset_val += int.from_bytes(offset) - 1
offset_val += int.from_bytes(offset)
typebyte = int.from_bytes(_file.read(1))
lobyte = None
if typebyte & 0x40:
lobyte = int.from_bytes(_file.read(1))
self.data_reloc.append((offset_val, typebyte, lobyte))
offset = _file.read(1)
self.text_reloc = self._parse_reloc(_file)
self.data_reloc = self._parse_reloc(_file)
export_count = int.from_bytes(_file.read(2), byteorder="little")
for _ in range(export_count):
@@ -85,6 +59,23 @@ class O65():
value = int.from_bytes(_file.read(2), byteorder="little")
self.exports.append((name.decode(), segment, value))
def _parse_reloc(self, fd: io.BufferedReader) -> list[(int, int, int)]:
reloc: list[(int, int, int)] = []
offset = fd.read(1)
while offset != b'\x00':
offset_val = 0
while offset == b'\xff':
offset = fd.read(1)
offset_val += int.from_bytes(offset) - 1
offset_val += int.from_bytes(offset)
typebyte = int.from_bytes(fd.read(1))
lobyte = None
if typebyte & 0x40:
lobyte = int.from_bytes(fd.read(1))
reloc.append((offset_val, typebyte, lobyte))
offset = fd.read(1)
return reloc
def main() -> None:
if len(sys.argv) < 2: