Debug: Update docs to gentoo

docs/Debug.md

@@ -29,10 +29,20 @@ Ignoring SIGSEGV when debugging in host:
 
 ### gdb
 
-Run `./build/bin/eden-cli -c <path to your config file (see logs where you run eden normally to see where it is)> -d -g <path to game>`
-
-Then hook up an aarch64-gdb (use `yay aarch64-gdb` or `sudo pkg in arch64-gdb` to install)
-Then type `target remote localhost:1234` and type `c` (for continue) - and then if it crashes just do a `bt` (backtrace) and `layout asm`.
+You need to have a `aarch64-gdb`, either install or cross-compile:
+* On Arch:
+  * `yay aarch64-gdb` or `sudo pkg in arch64-gdb`
+* On Gentoo:
+  * `sudo emerge --ask crossdev`
+  * `crossdev -t aarch64-unknown-linux-gnu --ex-gdb`
+
+`Enable GDB Stub` at General > Debug, then hook up an aarch64-gdb:
+* `target remote localhost:6543`
+
+Type:
+* for continue: `c`
+* then if it crashes: `bt` (backtrace)
+* and `layout asm`
 
 ### gdb cheatsheet