mirror of
https://git.k-space.ee/arti/vt1200.git
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70 lines
1.9 KiB
Python
70 lines
1.9 KiB
Python
#!/usr/bin/env python3
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"""Map ROM string refs to enclosing functions in the unidasm output."""
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import bisect
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import re
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import struct
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ASM = "/tmp/opencode/v22.asm"
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ROM = "vt1200_v22.bin"
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ROM_BASE = 0x07E40000
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lines = []
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with open(ASM) as f:
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for line in f:
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head = line.split(":", 1)[0].strip()
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try:
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a = int(head, 16)
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except ValueError:
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continue
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lines.append((a, line.rstrip("\n")))
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addrs = [a for a, _ in lines]
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# function prologues: MMTM SP, ... ; MOVE A14,A13
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entries = []
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for i, (a, t) in enumerate(lines):
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if "MMTM SP," in t:
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# look ahead a few instructions for MOVE A14,A13
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for j in range(i + 1, min(i + 4, len(lines))):
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if "MOVE A14,A13" in lines[j][1]:
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entries.append(a)
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break
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print(f"{len(entries)} function entries (MMTM prologue)")
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def enclosing(bitaddr):
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i = bisect.bisect_right(entries, bitaddr) - 1
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return entries[i] if i >= 0 else None
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def main():
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image = open(ROM, "rb").read()
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pat = re.compile(r"DMUL|DMUX|demultiplex|Illegal slot|service class|"
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r"STOP_SLOT|ATTN|DATA_B|Data_A|host_credits|Multiplex|"
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r"insert_latjob|LAT_CREATE|LAT_CLOSE|LAT_SEND|lat session|"
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r"slot|extinct|circuit|Circuit|Calloc")
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for m in re.finditer(rb"[\x20-\x7e]{4,}", image):
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s = m.group().decode("latin1")
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if not pat.search(s):
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continue
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off = m.start()
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val = (ROM_BASE + off) << 3
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p = struct.pack("<I", val)
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start = 0
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refs = []
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while True:
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i = image.find(p, start)
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if i < 0:
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break
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refs.append(i * 8)
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start = i + 1
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if not refs:
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continue
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for r in refs:
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e = enclosing(r)
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print(f"func 0x{(e or 0)//8:06X} ref 0x{r//8:06X} str 0x{off:06X} {s!r}")
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if __name__ == "__main__":
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main()
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