linux-kernel - Re: [PATCH 2.6.26 2/25] mdb: Merkey's Kernel Debugger

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 06 Aug 2008 03:35:59 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	jmerkey@...fmountaingroup.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.26 2/25] mdb: Merkey's Kernel Debugger

jmerkey@...fmountaingroup.com writes:
> regs->ip)
> -#ifndef CONFIG_KPROBES
> +#if !defined(CONFIG_KPROBES) && !defined(CONFIG_MDB)
>  DO_VM86_ERROR(3, SIGTRAP, "int3", int3)
>  #endif
>  DO_VM86_ERROR(4, SIGSEGV, "overflow", overflow)
> @@ -733,6 +747,9 @@
>  {
>  	if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) ==
> NOTIFY_STOP)
>  		return;
> +#ifdef	CONFIG_MDB
> +        mdb(NMI_EXCEPTION, reason, regs); // nmi is code 2
> +#endif

This should be all using die notifiers (register_die etc.) like the 
other kernel debuggers, not own hooks. As you can see there is already
a notify_die call around basically all the places you put in a mdb()
call, and you can just hook in there. If your other interfaces to the core 
kernel are clean enough this would even allow to use your debugger as a module.

-Andi
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/