Editing SoftICE (section)

=={{Anchor|RR0D}}Alternatives==
A commercial [[kernel (operating system)|kernel]]-level debugger called Syser claims to continue where SoftICE left off.

A [[shareware]] debugger, but free to use, [[OllyDbg]] is a [[32-bit]] assembler-level debugger from Oleh Yuschuk. However, it can only be used for user-mode debugging.

An open source kernel debugger similar to SoftICE named ''Rasta Ring 0 Debugger'' (RR0D) is available.<ref>{{cite web|url=http://wiki.droids-corp.org/articles/r/r/0/RR0D/Presentation.html|title=RR0D/Presentation|publisher=Wiki.droids-corp.org|access-date=2014-04-24|archive-date=2014-04-24|archive-url=https://web.archive.org/web/20140424124309/http://wiki.droids-corp.org/articles/r/r/0/RR0D/Presentation.html|url-status=live}}</ref><ref>{{cite web|url=http://www.woodmann.com/collaborative/tools/index.php/Rasta_Ring_0_Debugger_%28RR0D%29|title=Rasta Ring 0 Debugger (RR0D) - Collaborative RCE Tool Library|publisher=Woodmann.com|date=2007-10-18|access-date=2014-04-24|archive-date=2016-03-04|archive-url=https://web.archive.org/web/20160304135950/http://www.woodmann.com/collaborative/tools/index.php/Rasta_Ring_0_Debugger_(RR0D)|url-status=live}}</ref> It provides low-level debugging for [[Microsoft Windows]], [[Linux]], [[OpenBSD]], [[NetBSD]], and [[FreeBSD]]. This project does not seem to be actively maintained. {{As of|2016|6}}, the last change in its [[GitHub]] [[source code repository]] occurred in December 2008.<ref>{{cite web|author=joe|url=https://github.com/ice799/rr0d|title=ice799/rr0d|publisher=Github.com|access-date=2016-06-05|archive-date=2018-12-22|archive-url=https://web.archive.org/web/20181222011217/https://github.com/ice799/rr0d|url-status=live}}</ref>

A debugger called BugChecker is a 32-bit single-host kernel debugger for [[Windows 2000]] and XP, developed and made available as open source for educational purposes. BugChecker allows users to trace into both user and kernel code, both on uniprocessor and [[multiprocessor]] versions of Windows 2000 and XP.<ref>{{cite web|url=http://bugchecker.com/|title=BugChecker|publisher=BugChecker|access-date=2014-04-24|archive-date=2011-10-29|archive-url=https://web.archive.org/web/20111029004032/http://bugchecker.com/|url-status=live}}</ref>

A modern successor to SoftICE named BugChecker (unrelated to the one mentioned above) was released by Vito Plantamura in 2023. Unlike the other local kernel debuggers, it supports Windows XP to Windows 11, both 32-bit and 64-bit. To achieve this, the debugger spoofs the machine as being debugged by a second system by intercepting serial cable communication, and then and draws its display directly to the [[framebuffer]]. This method significantly improves stability and compatibility compared to previous approaches, including that of SoftICE itself.<ref>{{cite web|url=https://github.com/vitoplantamura/BugChecker|title=BugChecker|publisher=Github.com|access-date=2024-04-28}}</ref>

Many hypervisors allow debugging the kernel running in the [[virtual machine]] through exposing some kind of debugger interface that can control the [[virtualization|virtualized]] processor directly. This allows debugging even if the kernel does not have native debugging facilities.