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start_kgdb.py
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executable file
·195 lines (162 loc) · 5.87 KB
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#!/usr/bin/env python3
import argparse
import os
import signal
import sys
import textwrap
from pathlib import Path
try:
from loguru import logger
from src.debuggee import Debuggee
from src.debugger import Debugger
from src.docker_runner import DockerRunner
from src.kernel_builder import KernelBuilder
from src.kernel_unpacker import KernelUnpacker
from src.linux_kernel_dl import KernelDownloader
from src.misc import tmux
from src.rootfs_builder import RootFSBuilder
except ModuleNotFoundError:
if sys.prefix == sys.base_prefix:
print("-> No active virtual environment found!")
else:
print("-> Is the 'requirements.txt' installed?")
exit(-1)
finally:
if not os.getenv("TMUX"):
print("-> Not running inside a TMUX session!")
exit(-1)
def set_log_level(verbose: bool) -> str:
logger.remove()
log_level = "DEBUG" if verbose else "INFO"
logger.add(sys.stderr, level=log_level)
return log_level
def signal_handler(sig, frame) -> None:
logger.critical("Received CTRL+C. Shutting down!")
kill_session()
def kill_session() -> None:
tmux("selectw -t 'LIKE-DBG'")
tmux("selectp -t 0")
try:
containers = DockerRunner(kroot="foobar").list_running_containers()
for c in containers:
if c.status == "running" and next((s for s in c.image.tags if "like_" in s), None):
c.stop(timeout=0)
logger.debug(f"Stopped {c.image.tags}")
except Exception:
logger.debug("Something went wrong...")
finally:
tmux("kill-pane -a -t 0")
logger.info("Debugging session ended.")
exit(0)
def stage6(skip: bool, generic_args: dict, dbge_args: dict, dbg_args: dict) -> None:
kunpacker = stage5(skip, generic_args, dbge_args)
tmux("selectp -t 0")
tmux("splitw -v -p 50")
tmux("swap-pane -s 1 -t 2")
tmux("selectp -t 0")
Debugger(**dbg_args | kunpacker | generic_args).run()
def stage5(skip: bool, generic_args: dict, dbge_args: dict) -> dict[str, str]:
if not generic_args["ctf_ctx"]:
kunpacker = stage4(skip, **generic_args)
else:
kunpacker = {}
tmux("selectp -t 0")
tmux("splitw -h -p 50")
tmux("selectp -t 0")
Debuggee(**dbge_args | kunpacker | generic_args).run()
return kunpacker
def stage4(skip: bool, **kwargs) -> dict[str, str]:
if not skip:
kunpacker = stage3(skip, **kwargs)
RootFSBuilder(**kwargs | kunpacker).run()
return kunpacker
else:
RootFSBuilder(**kwargs, kroot="foobar").run()
return {}
def stage3(skip: bool, **kwargs) -> dict:
kunpacker = stage2(**kwargs)
if not kunpacker["status_code"] and not skip:
KernelBuilder(**kwargs | kunpacker).run()
else:
logger.info("Kernel already built. Skipping building phase...")
return kunpacker
def stage2(**kwargs) -> dict:
kaname = stage1(**kwargs)
return KernelUnpacker(kaname, **kwargs).run()
def stage1(**kwargs) -> Path:
return KernelDownloader(**kwargs).run()
def parse_cli() -> argparse.Namespace:
parser = argparse.ArgumentParser(formatter_class=argparse.RawTextHelpFormatter)
parser.add_argument("--config", "-c", required=False, nargs=1, help="Allows providing a custom 'user.ini'")
parser.add_argument("--ctf", nargs=2, required=False, help="Expected: <kernel_image> <root_file_system>")
parser.add_argument("--yes", "-y", action=argparse.BooleanOptionalAction, help="If this is set all re-use prompts are answered with 'yes'")
parser.add_argument("--verbose", "-v", action=argparse.BooleanOptionalAction, help="Enable debug logging")
parser.add_argument("--kill", "-k", action=argparse.BooleanOptionalAction, help="Completely shutdown current session")
parser.add_argument(
"--partial",
"-p",
type=int,
choices=range(1, 6),
help=textwrap.dedent(
"""\
Stage 1 - Kernel download only,
Stage 2 - Stage 1 & unpacking,
Stage 3 - Stage 2 & building,
Stage 4 - RootFS building only.
Stage 5 - Stage 3+4 & Starting the debugee.
"""
),
)
return parser.parse_args()
def main():
signal.signal(signal.SIGINT, signal_handler)
args = parse_cli()
log_level = set_log_level(args.verbose)
if args.kill:
kill_session()
tmux("selectp -t 0")
tmux('rename-session "LIKE-DBG"')
tmux('rename-window "LIKE-DBG"')
generic_args = {
"skip_prompts": True if args.yes else False,
"ctf_ctx": True if args.ctf else False,
"log_level": log_level,
"user_cfg": args.config[0] if args.config else "",
}
dbge_args = {}
dbg_args = {}
skip = False
if args.partial and args.ctf:
logger.error("Partial runs and CTF runs are mutually exclusive!")
exit(-1)
if args.partial:
logger.debug("Executing in partial-run context")
if args.partial == 1:
stage1()
elif args.partial == 2:
stage2(**generic_args)
elif args.partial == 3:
stage3(skip=False, **generic_args)
elif args.partial == 4:
stage4(skip=True, **generic_args)
else:
stage5(skip, generic_args, dbge_args)
exit(0)
if args.ctf:
logger.debug("Executing in CTF context")
ctf_kernel = Path(args.ctf[0])
ctf_fs = Path(args.ctf[1])
if not ctf_kernel.exists():
logger.critical(f"Failed to find {ctf_kernel}")
exit(-1)
if not ctf_fs.exists():
logger.critical(f"Failed to find {ctf_fs}")
exit(-1)
dbge_args = generic_args | {"ctf_kernel": ctf_kernel, "ctf_fs": ctf_fs}
dbg_args = {k: v for k, v in dbge_args.items() if k != "ctf_fs"}
skip = True
else:
logger.debug("Executing in non-CTF context")
stage6(skip, generic_args, dbge_args, dbg_args)
if __name__ == "__main__":
main()