improve ghidra integratino docs (#3171)

docs/tutorials/decompiler-integration/ghidra-integration.md

@@ -1,27 +1,66 @@
 # Ghidra
 
-With the help of [radare2](https://github.com/radareorg/radare2) or [rizin](https://github.com/rizinorg/rizin) it is possible to show the decompiled source code of the ghidra decompiler.
+Unlike with IDA and Binary Ninja, Ghidra is not considered an "integration provider". You cannot synchronise your Ghidra reverse engineering progress to Pwndbg.
+You can however integrate Ghidra's decompiler into Pwndbg such that the decompiled version of any function you're in is shown in the Pwndbg context.
 
-However, this comes with some prerequisites.
+??? example "Example Screenshot"
+    ![](../../assets/caps/tutorials/ghidra_decomp.png)
 
-* First: you have to have installed radare2 or rizin and it must be found by GDB (within path)
-* Second: you have to install the ghidra plugin for radare2
-  [r2ghidra](https://github.com/radareorg/r2ghidra) or install the ghidra plugin for rizin [rz-ghidra](https://github.com/rizinorg/rz-ghidra)
-* Third: r2pipe has to be installed in the python-context GDB is using (or if you are using rizin, install rzpipe instead)
+To do this, we will need the help of [radare2](https://github.com/radareorg/radare2) or [rizin](https://github.com/rizinorg/rizin).
 
-The decompiled source be shown as part of the context by adding `ghidra` to `set context-sections`
-or by calling `ctx-ghidra [function]` manually.
+## Setup
 
-Be warned, the first call to both radare2/r2ghidra and rizin/rz-ghidra are rather slow! Subsequent requests for decompiled
-source will be faster. And it does take up some resources as the radare2/rizin instance is kept by r2pipe/rzpipe
-to enable faster subsequent analysis.
+=== "rizin"
+    1. Install [rizin](https://github.com/rizinorg/rizin). It must be found by the debugger (within path).
+    2. Install the Ghidra plugin for rizin: [rz-ghidra](https://github.com/rizinorg/rz-ghidra).
+    3. Install [rzpipe](https://pypi.org/project/rzpipe/) and make sure the python used by the debugger can access it.
+    4. Add `set r2decompiler rizin` to your `~/.gdbinit` after Pwndbg is sourced.
 
-With those performance penalties it is reasonable to not have it launch always. Therefore it includes
-an option to only start it when required with `set context-ghidra`:
+    Regarding the third step, if you don't install to your user or system-wide python (but rather a virtual environment), you may add something like this to the beginning of your `~/.gdbinit`:
+    ```
+    python
+    import sys
+    import os
+    from glob import glob
 
-* `set context-ghidra always`: always trigger the ghidra context
-* `set context-ghidra never`: never trigger the ghidra context except when called manually
-* `set context-ghidra if-no-source`: invoke ghidra if no source code is available
+    venv = os.path.expanduser('~/tools/rizin/venv')
+    site_dir_pattern = os.path.join(venv, 'lib', 'python*/site-packages')
+    site_dirs = glob(site_dir_pattern)
+    sys.path.insert(0, site_dirs[0])
+    import rzpipe
+    end
+    ```
+=== "radare2"
+    1. Install [radare2](https://github.com/radareorg/radare2). It must be found by the debugger (within path).
+    2. Install the Ghidra plugin for radare2: [r2ghidra](https://github.com/radareorg/r2ghidra).
+    3. Install [r2pipe](https://pypi.org/project/r2pipe/) and make sure the python used by the debugger can access it.
+    4. Add `set r2decompiler radare2` to your `~/.gdbinit` after Pwndbg is sourced.
+
+    Regarding the third step, if you don't install to your user or system-wide python (but rather a virtual environment), you may add something like this to the beginning of your `~/.gdbinit`:
+    ```
+    python
+    import sys
+    import os
+    from glob import glob
+
+    venv = os.path.expanduser('~/tools/radare2/venv')
+    site_dir_pattern = os.path.join(venv, 'lib', 'python*/site-packages')
+    site_dirs = glob(site_dir_pattern)
+    sys.path.insert(0, site_dirs[0])
+    import r2pipe
+    end
+    ```
+
+## Usage
+
+Append `set context-ghidra if-no-source` to your `~/.gdbinit`. You should be able to see the
+`[ GHIDRA DECOMPILE ]` context now right below your disassembly. If you want to temporarily enable/disable
+it or move around the context sections, see [context-ghidra](../../configuration/config.md#context-ghidra)
+and [contextoutput](../../commands/context/contextoutput.md).
+
+Be warned, the first call to both radare2/r2ghidra and rizin/rz-ghidra are rather slow!
+Subsequent requests for decompiled source will be faster. And it does take up some resources
+as the radare2/rizin instance is kept by r2pipe/rzpipe to enable faster subsequent analysis.
 
 Remark: the plugin tries to guess the correct current line and mark it with "-->", but it might
 get it wrong.