add iodebug support for all rings moved to #66

[therealdreg]

Moved to #66

This PR is for "I/O Interface to Bochs Debugger" from ring3 (port range: 0x8A00 - 0x8A01)

PR #64 was for E9 HACK (port 0xE9)

By enabling the iodebug's 'all_rings' option, you can utilize the port I/O Interface to Bochs Debugger from ring3. This PR allows the code running inside Bochs (ring3) to monitor memory ranges, trace individual instructions, and observe register values during execution.

https://bochs.sourceforge.io/doc/docbook/development/debugger-advanced.html

IMO very useful for:

• user-mode sandbox (ex Cuckoo)
• malware analysis
• API/SYSCALL hook/monitor from ring3
• automation + instrumentation from user mode code
  ...

A complement for PR #64

This PR is 100% backward compatibility

btw, @stlintel I'm not certain about:

• if misc is the ideal location for this.. should I create a new iodebug-option for this?
• should I remove the #if in 'new bx_param_bool_c'?
• the new .bochsrc entry makes sense for you?

[stlintel]

This was merged already ?!

Branch: refs/heads/master
Home: https://github.com/bochs-emu/Bochs
Commit: da43cc4
da43cc4
Author: Dreg <dreg@fr33project.org>
Date: 2023-08-26 (Sat, 26 Aug 2023)

Changed paths:
M bochs/.bochsrc
M bochs/PARAM_TREE.txt
M bochs/config.cc
M bochs/cpu/io.cc
M bochs/doc/docbook/user/user.dbk
M bochs/param_names.h

Log Message:

add port e9 hack support for all rings (#64)

By enabling the 'all_rings' option, you can utilize the port e9 hack from ring3

IMO very useful for:

• user-mode sandbox (ex Cuckoo)
• malware analysis
• API/SYSCALL logger with a simple hook from ring3
• automation + instrumentation from user mode code
• ...

So yes, from this PR a user-mode-sandbox can display on the console of the system running Bochs anything that is written to 0xE9 port

This PR is 100% backward compatibility

btw, @stlintel I'm not certain if bochs/config.cc is the ideal location to define bool port_e9_hack_all_rings (unmapped io/dev is
better?)

[therealdreg]

@stlintel this is for "I/O Interface to Bochs Debugger" from ring3 (port range: 0x8A00 - 0x8A01)

PR #64 was for E9 HACK (port 0xE9)

They are different features...

Moved for #66