543 lines
20 KiB
Python
543 lines
20 KiB
Python
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#!/usr/bin/env python3
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from __future__ import annotations
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import csv
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import json
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import re
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import subprocess
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from bisect import bisect_right
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from functools import lru_cache
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from pathlib import Path
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PENDING_TEMPLATE_STORE_DEFAULT_SEEDS = [
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0x0059B2E0,
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0x0059B710,
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0x0059B740,
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0x0059C470,
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0x0059C540,
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0x0059C590,
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0x0059C5B0,
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0x0059C5E0,
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0x0059C5F0,
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]
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PENDING_TEMPLATE_STORE_ADJACENT_MIN = 0x0059B000
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PENDING_TEMPLATE_STORE_ADJACENT_MAX = 0x0059D000
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DESTRUCTOR_SWITCH_ADDR = 0x0059B2E0
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HEAP_FREE_ADDR = 0x0058F3C0
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def parse_hex(text: str) -> int:
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value = text.strip().lower()
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if value.startswith("0x"):
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value = value[2:]
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return int(value, 16)
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def fmt_addr(value: int) -> str:
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return f"0x{value:08x}"
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def display_string(text: str) -> str:
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return text.encode("unicode_escape").decode("ascii")
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def clean_json_payload(text: str) -> str:
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stripped = text.strip()
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if not stripped:
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raise ValueError("rizin returned empty output")
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starts = [index for index in (stripped.find("["), stripped.find("{")) if index >= 0]
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if not starts:
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raise ValueError("rizin did not return JSON")
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return stripped[min(starts) :]
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def run_rizin_json(exe_path: Path, command: str) -> object:
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result = subprocess.run(
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[
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"rizin",
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"-q",
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"-e",
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"scr.color=false",
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"-c",
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command,
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str(exe_path),
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],
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check=True,
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capture_output=True,
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text=True,
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)
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return json.loads(clean_json_payload(result.stdout))
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def run_objdump_excerpt(exe_path: Path, address: int, radius: int = 0x20) -> str:
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start = max(address - radius, 0)
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stop = address + radius
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result = subprocess.run(
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[
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"llvm-objdump",
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"-d",
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"--no-show-raw-insn",
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f"--start-address={fmt_addr(start)}",
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f"--stop-address={fmt_addr(stop)}",
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str(exe_path),
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],
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check=True,
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capture_output=True,
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text=True,
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)
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lines = [
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line.rstrip()
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for line in result.stdout.splitlines()
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if re.match(r"^\s*[0-9a-fA-F]+:", line)
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]
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return "\n".join(lines)
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def load_curated_rows(path: Path) -> dict[int, dict[str, str]]:
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if not path.exists():
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return {}
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with path.open(newline="", encoding="utf-8") as handle:
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rows = csv.DictReader(handle)
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return {parse_hex(row["address"]): dict(row) for row in rows}
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class FunctionIndex:
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def __init__(self, rows: list[dict[str, object]], curated_names: dict[int, str]):
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self.rows = sorted(rows, key=lambda row: int(row["offset"]))
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self.by_start = {int(row["offset"]): row for row in self.rows}
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self.starts = [int(row["offset"]) for row in self.rows]
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self.curated_names = curated_names
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def get_exact(self, address: int) -> dict[str, object] | None:
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return self.by_start.get(address)
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def find_containing(self, address: int) -> dict[str, object] | None:
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index = bisect_right(self.starts, address) - 1
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if index < 0:
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return None
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row = self.rows[index]
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start = int(row["offset"])
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end = int(row.get("maxbound", start + int(row.get("size", 0))))
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if start <= address < end:
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return row
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return None
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def preferred_name(self, row: dict[str, object]) -> str:
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start = int(row["offset"])
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return self.curated_names.get(start, str(row["name"]))
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class BranchAnalyzer:
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def __init__(self, exe_path: Path, output_dir: Path):
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self.exe_path = exe_path.resolve()
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self.output_dir = output_dir.resolve()
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self.output_dir.mkdir(parents=True, exist_ok=True)
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curated_map = self.output_dir / "function-map.csv"
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self.curated_rows = load_curated_rows(curated_map)
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self.curated_names = {
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address: row["name"] for address, row in self.curated_rows.items()
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}
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self.function_index = FunctionIndex(
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self._load_function_rows(),
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self.curated_names,
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)
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self.strings = list(run_rizin_json(self.exe_path, "izzj"))
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self.strings_by_addr = {int(entry["vaddr"]): entry for entry in self.strings}
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def _load_function_rows(self) -> list[dict[str, object]]:
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rows = list(run_rizin_json(self.exe_path, "aaa; aflj"))
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known_starts = {int(row["offset"]) for row in rows}
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missing_curated = sorted(
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address for address in self.curated_names if address not in known_starts
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)
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if not missing_curated:
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return rows
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define_cmd = "aaa; " + "; ".join(
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f"af @ {fmt_addr(address)}" for address in missing_curated
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) + "; aflj"
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return list(run_rizin_json(self.exe_path, define_cmd))
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@lru_cache(maxsize=None)
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def xrefs_to(self, address: int) -> list[dict[str, object]]:
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return list(run_rizin_json(self.exe_path, f"aaa; axtj @ {fmt_addr(address)}"))
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@lru_cache(maxsize=None)
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def function_pdfj(self, address: int) -> dict[str, object]:
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payload = run_rizin_json(self.exe_path, f"aaa; s {fmt_addr(address)}; pdfj")
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if not isinstance(payload, dict):
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raise TypeError(f"unexpected pdfj payload for {fmt_addr(address)}")
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return payload
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@lru_cache(maxsize=None)
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def excerpt(self, address: int) -> str:
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return run_objdump_excerpt(self.exe_path, address)
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def fallback_function(self, address: int) -> dict[str, object] | None:
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curated = self.curated_rows.get(address)
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if curated is None:
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return None
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size = int(curated["size"])
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return {
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"offset": address,
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"name": curated["name"],
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"size": size,
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"maxbound": address + size,
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"calltype": curated["calling_convention"],
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"signature": "",
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"codexrefs": self.xrefs_to(address),
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"callrefs": [],
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"datarefs": [],
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"synthetic": True,
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}
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def resolve_target_function(self, address: int) -> dict[str, object] | None:
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exact = self.function_index.get_exact(address)
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if exact is not None:
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return exact
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fallback = self.fallback_function(address)
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if fallback is not None:
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return fallback
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return self.function_index.find_containing(address)
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def format_callers(self, row: dict[str, object]) -> list[dict[str, object]]:
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callers: list[dict[str, object]] = []
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for ref in row.get("codexrefs", []):
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if ref.get("type") != "CALL":
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continue
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call_site = int(ref["from"])
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caller = self.function_index.find_containing(call_site)
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callers.append({"call_site": call_site, "function": caller})
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callers.sort(key=lambda entry: entry["call_site"])
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return callers
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def format_callees(self, row: dict[str, object]) -> list[dict[str, object]]:
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callees: list[dict[str, object]] = []
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seen: set[tuple[int, int]] = set()
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for ref in row.get("callrefs", []):
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if ref.get("type") != "CALL":
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continue
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call_site = int(ref["from"])
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callee_site = int(ref["to"])
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callee = self.function_index.find_containing(callee_site)
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if callee is None:
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continue
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key = (call_site, int(callee["offset"]))
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if key in seen:
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continue
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seen.add(key)
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callees.append({"call_site": call_site, "function": callee})
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callees.sort(key=lambda entry: (int(entry["function"]["offset"]), entry["call_site"]))
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return callees
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def format_data_refs(self, row: dict[str, object]) -> list[dict[str, object]]:
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refs: list[dict[str, object]] = []
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seen: set[tuple[int, int, str]] = set()
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for ref in row.get("datarefs", []):
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from_addr = int(ref["from"])
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to_addr = int(ref["to"])
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ref_type = str(ref.get("type", "DATA"))
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key = (from_addr, to_addr, ref_type)
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if key in seen:
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continue
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seen.add(key)
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refs.append(
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{
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"from": from_addr,
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"to": to_addr,
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"type": ref_type,
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"string": self.strings_by_addr.get(to_addr),
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}
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)
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refs.sort(key=lambda entry: (entry["to"], entry["from"]))
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return refs
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def describe_caller(self, call_site: int, function: dict[str, object] | None) -> str:
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if function is None:
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return fmt_addr(call_site)
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return (
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f"{fmt_addr(call_site)}@{fmt_addr(int(function['offset']))}:"
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f"{self.function_index.preferred_name(function)}"
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)
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def describe_callee(self, call_site: int, function: dict[str, object] | None) -> str:
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if function is None:
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return fmt_addr(call_site)
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return (
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f"{fmt_addr(call_site)}->{fmt_addr(int(function['offset']))}:"
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f"{self.function_index.preferred_name(function)}"
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)
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def describe_data_ref(self, entry: dict[str, object]) -> str:
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target = fmt_addr(int(entry["to"]))
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string_entry = entry["string"]
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if string_entry is not None:
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target += f':"{display_string(str(string_entry["string"]))}"'
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return f"{fmt_addr(int(entry['from']))}->{target}"
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def collect_key_constants(self, pdfj: dict[str, object]) -> list[str]:
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values: list[int] = []
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seen: set[int] = set()
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for op in pdfj.get("ops", []):
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for key in ("val", "ptr"):
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raw = op.get(key)
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if not isinstance(raw, int):
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continue
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if raw < 0x10 or raw > 0x100000:
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continue
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if 0x00400000 <= raw <= 0x01000000:
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continue
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if raw in seen:
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continue
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seen.add(raw)
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values.append(raw)
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return [fmt_addr(value) for value in values[:10]]
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def collect_key_strings(self, data_refs: list[dict[str, object]]) -> list[str]:
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strings: list[str] = []
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seen: set[str] = set()
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for entry in data_refs:
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string_entry = entry["string"]
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if string_entry is None:
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continue
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text = display_string(str(string_entry["string"]))
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if text in seen:
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continue
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seen.add(text)
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strings.append(text)
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return strings[:8]
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def discover_adjacent_functions(self, addresses: list[int]) -> list[int]:
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discovered = set(addresses)
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for address in addresses:
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function = self.resolve_target_function(address)
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if function is None:
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continue
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for entry in self.format_callers(function):
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caller = entry["function"]
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if caller is None:
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continue
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caller_start = int(caller["offset"])
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if PENDING_TEMPLATE_STORE_ADJACENT_MIN <= caller_start < PENDING_TEMPLATE_STORE_ADJACENT_MAX:
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discovered.add(caller_start)
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for entry in self.format_callees(function):
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callee = entry["function"]
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callee_start = int(callee["offset"])
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if PENDING_TEMPLATE_STORE_ADJACENT_MIN <= callee_start < PENDING_TEMPLATE_STORE_ADJACENT_MAX:
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discovered.add(callee_start)
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return sorted(discovered)
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def build_function_rows(self, addresses: list[int]) -> list[dict[str, str]]:
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rows: list[dict[str, str]] = []
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for query_address in self.discover_adjacent_functions(addresses):
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function = self.resolve_target_function(query_address)
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if function is None:
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continue
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callers = self.format_callers(function)
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callees = self.format_callees(function)
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data_refs = self.format_data_refs(function)
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pdfj = self.function_pdfj(int(function["offset"]))
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rows.append(
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{
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"query_address": fmt_addr(query_address),
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"function_address": fmt_addr(int(function["offset"])),
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"name": self.function_index.preferred_name(function),
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"size": str(function["size"]),
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"calling_convention": str(function.get("calltype", "unknown")),
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"caller_count": str(len(callers)),
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"callers": "; ".join(
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self.describe_caller(entry["call_site"], entry["function"])
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|
|
for entry in callers
|
||
|
|
),
|
||
|
|
"callee_count": str(len(callees)),
|
||
|
|
"callees": "; ".join(
|
||
|
|
self.describe_callee(entry["call_site"], entry["function"])
|
||
|
|
for entry in callees
|
||
|
|
),
|
||
|
|
"data_ref_count": str(len(data_refs)),
|
||
|
|
"data_refs": "; ".join(self.describe_data_ref(entry) for entry in data_refs),
|
||
|
|
"key_constants": "; ".join(self.collect_key_constants(pdfj)),
|
||
|
|
"key_strings": "; ".join(self.collect_key_strings(data_refs)),
|
||
|
|
"entry_excerpt": self.excerpt(int(function["offset"])).replace("\n", " | "),
|
||
|
|
}
|
||
|
|
)
|
||
|
|
return rows
|
||
|
|
|
||
|
|
def _case_groups(self, switch_address: int) -> list[dict[str, object]]:
|
||
|
|
pdfj = self.function_pdfj(switch_address)
|
||
|
|
groups: list[dict[str, object]] = []
|
||
|
|
current: dict[str, object] | None = None
|
||
|
|
case_pattern = re.compile(r"^case\.0x[0-9a-f]+\.(\d+)$")
|
||
|
|
default_pattern = re.compile(r"^case\.default\.0x[0-9a-f]+$")
|
||
|
|
for op in pdfj.get("ops", []):
|
||
|
|
labels: list[str] = []
|
||
|
|
for flag in op.get("flags", []):
|
||
|
|
match = case_pattern.match(flag)
|
||
|
|
if match:
|
||
|
|
labels.append(match.group(1))
|
||
|
|
continue
|
||
|
|
if default_pattern.match(flag):
|
||
|
|
labels.append("default")
|
||
|
|
if labels:
|
||
|
|
current = {
|
||
|
|
"start": int(op["offset"]),
|
||
|
|
"cases": labels,
|
||
|
|
"ops": [op],
|
||
|
|
}
|
||
|
|
groups.append(current)
|
||
|
|
continue
|
||
|
|
if current is not None:
|
||
|
|
current["ops"].append(op)
|
||
|
|
return groups
|
||
|
|
|
||
|
|
def _infer_case_shape(self, ops: list[dict[str, object]]) -> tuple[str, str, str]:
|
||
|
|
disasm_lines = [str(op["disasm"]) for op in ops]
|
||
|
|
text = "\n".join(disasm_lines)
|
||
|
|
direct_offsets = {
|
||
|
|
int(match.group(1), 16)
|
||
|
|
for match in re.finditer(r"\[(?:edi|eax|ecx)\+0x([0-9a-f]+)\]", text)
|
||
|
|
}
|
||
|
|
indexed_offsets = {
|
||
|
|
int(match.group(1), 16)
|
||
|
|
for match in re.finditer(r"\[(?:edi|eax|ecx)\+0x([0-9a-f]+)\]", text)
|
||
|
|
if "*4" in text
|
||
|
|
}
|
||
|
|
free_calls = sum(
|
||
|
|
1
|
||
|
|
for op in ops
|
||
|
|
if op.get("jump") == HEAP_FREE_ADDR or "fcn.0058f3c0" in str(op.get("disasm", ""))
|
||
|
|
)
|
||
|
|
has_loop = any("*4" in line for line in disasm_lines)
|
||
|
|
|
||
|
|
fields = ["top-level payload"]
|
||
|
|
for offset in sorted(direct_offsets):
|
||
|
|
fields.append(f"payload+0x{offset:02x}")
|
||
|
|
if has_loop:
|
||
|
|
for offset in sorted(indexed_offsets):
|
||
|
|
fields.append(f"vector@payload+0x{offset:02x}")
|
||
|
|
|
||
|
|
unique_fields = []
|
||
|
|
seen_fields: set[str] = set()
|
||
|
|
for field in fields:
|
||
|
|
if field in seen_fields:
|
||
|
|
continue
|
||
|
|
seen_fields.add(field)
|
||
|
|
unique_fields.append(field)
|
||
|
|
|
||
|
|
if has_loop and len(direct_offsets) >= 3:
|
||
|
|
shape = "pointer vectors with paired side tables"
|
||
|
|
elif has_loop:
|
||
|
|
shape = "indexed pointer vector"
|
||
|
|
elif len(direct_offsets) >= 4:
|
||
|
|
shape = "fixed pointer tuple"
|
||
|
|
elif len(direct_offsets) >= 2:
|
||
|
|
shape = "paired nested pointers"
|
||
|
|
elif free_calls <= 1:
|
||
|
|
shape = "top-level payload pointer"
|
||
|
|
else:
|
||
|
|
shape = "single nested pointer"
|
||
|
|
|
||
|
|
cleanup_summary = f"{free_calls} heap free call(s)"
|
||
|
|
excerpt = " | ".join(disasm_lines[:8])
|
||
|
|
return shape, ", ".join(unique_fields), cleanup_summary + f"; {excerpt}"
|
||
|
|
|
||
|
|
def build_record_kind_rows(self) -> list[dict[str, str]]:
|
||
|
|
rows: list[dict[str, str]] = []
|
||
|
|
for group in self._case_groups(DESTRUCTOR_SWITCH_ADDR):
|
||
|
|
shape, freed_fields, notes = self._infer_case_shape(group["ops"])
|
||
|
|
case_group = ",".join(group["cases"])
|
||
|
|
for case_label in group["cases"]:
|
||
|
|
rows.append(
|
||
|
|
{
|
||
|
|
"record_kind": case_label,
|
||
|
|
"case_group": case_group,
|
||
|
|
"owning_function": fmt_addr(DESTRUCTOR_SWITCH_ADDR),
|
||
|
|
"owning_name": self.curated_names.get(
|
||
|
|
DESTRUCTOR_SWITCH_ADDR,
|
||
|
|
"multiplayer_transport_destroy_pending_template_dispatch_record",
|
||
|
|
),
|
||
|
|
"inferred_payload_shape": shape,
|
||
|
|
"freed_fields": freed_fields,
|
||
|
|
"notes": notes,
|
||
|
|
}
|
||
|
|
)
|
||
|
|
rows.sort(
|
||
|
|
key=lambda row: (
|
||
|
|
row["record_kind"] == "default",
|
||
|
|
int(row["record_kind"]) if row["record_kind"] != "default" else 0,
|
||
|
|
)
|
||
|
|
)
|
||
|
|
return rows
|
||
|
|
|
||
|
|
def write_csv(self, path: Path, rows: list[dict[str, str]]) -> None:
|
||
|
|
if not rows:
|
||
|
|
return
|
||
|
|
with path.open("w", newline="", encoding="utf-8") as handle:
|
||
|
|
writer = csv.DictWriter(handle, fieldnames=list(rows[0].keys()))
|
||
|
|
writer.writeheader()
|
||
|
|
writer.writerows(rows)
|
||
|
|
|
||
|
|
def write_pending_template_store_markdown(self, function_rows: list[dict[str, str]]) -> None:
|
||
|
|
by_address = {parse_hex(row["function_address"]): row for row in function_rows}
|
||
|
|
sections = {
|
||
|
|
"Init": [0x0059B710, 0x0059C5B0],
|
||
|
|
"Destroy": [0x0059B2E0, 0x0059B740, 0x0059C5E0],
|
||
|
|
"Lookup": [0x0059C540, 0x0059C590],
|
||
|
|
"Prune / Remove": [0x0059C470],
|
||
|
|
"Dispatch / Update": [0x0059C220, 0x0059C5F0],
|
||
|
|
}
|
||
|
|
|
||
|
|
lines = [
|
||
|
|
"# Pending-Template Store Management",
|
||
|
|
"",
|
||
|
|
f"- Target binary: `{self.exe_path}`",
|
||
|
|
"- Scope: companion pending-template dispatch store and its adjacent management helpers.",
|
||
|
|
"",
|
||
|
|
]
|
||
|
|
|
||
|
|
for title, addresses in sections.items():
|
||
|
|
lines.extend([f"## {title}", ""])
|
||
|
|
for address in addresses:
|
||
|
|
row = by_address.get(address)
|
||
|
|
if row is None:
|
||
|
|
continue
|
||
|
|
lines.append(f"### `{row['function_address']}` `{row['name']}`")
|
||
|
|
lines.append("")
|
||
|
|
lines.append(f"- Size: `{row['size']}`")
|
||
|
|
lines.append(f"- Calling convention: `{row['calling_convention']}`")
|
||
|
|
lines.append(f"- Callers: {row['callers'] or 'none'}")
|
||
|
|
lines.append(f"- Direct callees: {row['callees'] or 'none'}")
|
||
|
|
lines.append(f"- Data refs: {row['data_refs'] or 'none'}")
|
||
|
|
lines.append(f"- Key constants: {row['key_constants'] or 'none'}")
|
||
|
|
lines.append(f"- Key strings: {row['key_strings'] or 'none'}")
|
||
|
|
lines.append("")
|
||
|
|
lines.append("Entry excerpt:")
|
||
|
|
lines.append("")
|
||
|
|
lines.append("```asm")
|
||
|
|
lines.append(self.excerpt(address))
|
||
|
|
lines.append("```")
|
||
|
|
lines.append("")
|
||
|
|
|
||
|
|
(self.output_dir / "pending-template-store-management.md").write_text(
|
||
|
|
"\n".join(lines) + "\n",
|
||
|
|
encoding="utf-8",
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def export_pending_template_store(
|
||
|
|
exe_path: Path,
|
||
|
|
output_dir: Path,
|
||
|
|
seed_addresses: list[int],
|
||
|
|
) -> None:
|
||
|
|
analyzer = BranchAnalyzer(exe_path, output_dir)
|
||
|
|
function_rows = analyzer.build_function_rows(seed_addresses)
|
||
|
|
record_rows = analyzer.build_record_kind_rows()
|
||
|
|
analyzer.write_csv(output_dir / "pending-template-store-functions.csv", function_rows)
|
||
|
|
analyzer.write_csv(output_dir / "pending-template-store-record-kinds.csv", record_rows)
|
||
|
|
analyzer.write_pending_template_store_markdown(function_rows)
|