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Update o65dump to show reloc and undef symbols

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Byron Lathi
2023-08-23 00:11:57 -07:00
parent 8bccfed867
commit cc1d8d2015
2 changed files with 55 additions and 3 deletions
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5
sw/kernel/link.ld
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@@ -26,7 +26,7 @@ FILES
FORMATS
{
o65: os = lunix, version = 0, type = small,
o65: os = super, version = 0, type = small,
export = _init;
}
@@ -44,4 +44,5 @@ FEATURES {
SYMBOLS {
__STACKSIZE__: value = $0E00, type = weak;
__STACKSTART__: type = weak, value = $0800;
}
}

53
sw/script/o65dump.py
View File

@@ -9,6 +9,10 @@ class O65():
options: list[(int, int, bytes)] = []
text: bytes
data: bytes
undef_ref_cnt: int
text_reloc: list[(int, int, int)] = []
data_reloc: list[(int, int, int)] = []
exports: list[(str, int, int)] = []
def __init__(self, filename: str) -> None:
with open(filename, "rb") as _file:
@@ -36,7 +40,50 @@ class O65():
self.text = _file.read(self.header["tlen"])
self.data = _file.read(self.header["dlen"])
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)
export_count = int.from_bytes(_file.read(2), byteorder="little")
for _ in range(export_count):
name: bytearray = bytearray()
data = 0
while True:
data = _file.read(1)
if data != b"\x00":
name.extend(data)
else:
break
segment = int.from_bytes(_file.read(1))
value = int.from_bytes(_file.read(2), byteorder="little")
self.exports.append((name.decode(), segment, value))
def main() -> None:
@@ -55,5 +102,9 @@ def main() -> None:
with open("text.bin", "wb") as textfile:
textfile.write(o65.text)
for item in o65.exports:
print(f"Name: {item[0]} Addr: {item[2]:#x}")
if __name__ == "__main__":
main()
main()