linux-kernel - Re: [PATCH v2 2.6.38-rc8-tip 3/20] 3: uprobes: Breakground page replacement.

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Date:	Mon, 14 Mar 2011 11:29:06 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	Linux-mm <linux-mm@...ck.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	Andi Kleen <andi@...stfloor.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Oleg Nesterov <oleg@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	Roland McGrath <roland@...k.frob.com>,
	SystemTap <systemtap@...rces.redhat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCH v2 2.6.38-rc8-tip 3/20]  3: uprobes: Breakground page
 replacement.

On Mon, 2011-03-14 at 19:04 +0530, Srikar Dronamraju wrote:
> +/*
> + * Most architectures can use the default versions of @read_opcode(),
> + * @set_bkpt(), @set_orig_insn(), and @is_bkpt_insn();
> + *
> + * @set_ip:
> + *     Set the instruction pointer in @regs to @vaddr.
> + * @analyze_insn:
> + *     Analyze @user_bkpt->insn.  Return 0 if @user_bkpt->insn is an
> + *     instruction you can probe, or a negative errno (typically -%EPERM)
> + *     otherwise. Determine what sort of

sort of ... what?

-- Steve

> + * @pre_xol:
> + * @post_xol:
> + *     XOL-related fixups @post_xol() (and possibly @pre_xol()) will need
> + *     to do for this instruction, and annotate @user_bkpt accordingly.
> + *     You may modify @user_bkpt->insn (e.g., the x86_64 port does this
> + *     for rip-relative instructions).
> + */ 

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