usage

$./fastDbg
      ___           ___           ___           ___           ___           ___           ___
     /\  \         /\  \         /\  \         /\  \         /\  \         /\  \         /\  \
    /::\  \       /::\  \       /::\  \        \:\  \       /::\  \       /::\  \       /::\  \
   /:/\:\  \     /:/\:\  \     /:/\ \  \        \:\  \     /:/\:\  \     /:/\:\  \     /:/\:\  \
  /::\~\:\  \   /::\~\:\  \   _\:\~\ \  \       /::\  \   /:/  \:\__\   /::\~\:\__\   /:/  \:\  \
 /:/\:\ \:\__\ /:/\:\ \:\__\ /\ \:\ \ \__\     /:/\:\__\ /:/__/ \:|__| /:/\:\ \:|__| /:/__/_\:\__\
 \/__\:\ \/__/ \/__\:\/:/  / \:\ \:\ \/__/    /:/  \/__/ \:\  \ /:/  / \:\~\:\/:/  / \:\  /\ \/__/
      \:\__\        \::/  /   \:\ \:\__\     /:/  /       \:\  /:/  /   \:\ \::/  /   \:\ \:\__\
       \/__/        /:/  /     \:\/:/  /     \/__/         \:\/:/  /     \:\/:/  /     \:\/:/  /
                   /:/  /       \::/  /                     \::/__/       \::/__/       \::/  /
                   \/__/         \/__/                       ~~            ~~            \/__/
Error: Must specify either -f <file> OR -p <pid> OR -qemu

Usage: ./fastDbg [OPTIONS]

Userland Debugging:
  -f <file>    Debug executable file
  -p <pid>     Attach to running process

Kernel Debugging (QEMU):
  -qemu              Enable QEMU kernel debugging
  -qemu-host <host>  QEMU GDB server host (default: localhost)
  -qemu-port <port>  QEMU GDB server port (default: 12345)

userland

launch process

./fastDbg -f <file>

attach to existing process

sudo ./fastDbg -p <pid>

kernel

default: host=localhost, port=12345

./fastDbg -qemu

example debuggee

#!/bin/bash
qemu-system-x86_64 \
-gdb tcp::12345 \
-m 128M \
-kernel ./bzImage \
-initrd ./rootfs.cpio \
-append "console=ttyS0 loglevel=3 oops=panic panic_on_warn=1 kpti" \
-monitor /dev/null \
-nographic \
-cpu qemu64,+smep,+smap \
-smp 1 \
-no-reboot