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From: Peter Zijlstra <peterz@infradead.org>
To: ananth@in.ibm.com
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
	lkml <linux-kernel@vger.kernel.org>,
	oleg@redhat.com, Paul Mackerras <paulus@samba.org>,
	Anton Blanchard <anton@samba.org>, Ingo Molnar <mingo@elte.hu>,
	linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 2/2] [POWERPC] uprobes: powerpc port
Date: Wed, 06 Jun 2012 11:27:02 +0200	[thread overview]
Message-ID: <1338974822.2749.89.camel@twins> (raw)
In-Reply-To: <20120606092150.GC6745@in.ibm.com>

On Wed, 2012-06-06 at 14:51 +0530, Ananth N Mavinakayanahalli wrote:
> One TODO in this port compared to x86 is the uprobe abort_xol() logic.
> x86 depends on the thread_struct.trap_nr (absent in powerpc) to determine
> if a signal was caused when the uprobed instruction was single-stepped/
> emulated, in which case, we reset the instruction pointer to the probed
> address and retry the probe again.=20

Another curious difference is that x86 uses an instruction decoder and
contains massive tables to validate we can probe a particular
instruction.

Can we probe all possible PPC instructions?

  reply	other threads:[~2012-06-06  9:27 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-06  9:19 [PATCH 1/2] uprobes: Pass probed vaddr to arch_uprobe_analyze_insn() Ananth N Mavinakayanahalli
2012-06-06  9:21 ` [PATCH 2/2] [POWERPC] uprobes: powerpc port Ananth N Mavinakayanahalli
2012-06-06  9:27   ` Peter Zijlstra [this message]
2012-06-06  9:35     ` Ananth N Mavinakayanahalli
2012-06-06 18:08       ` Jim Keniston
2012-06-08  4:36         ` Ananth N Mavinakayanahalli
2012-06-08  5:51           ` Michael Ellerman
2012-06-08  6:01             ` Ananth N Mavinakayanahalli
2012-06-08  6:17               ` Michael Ellerman
2012-06-08  6:19                 ` Ananth N Mavinakayanahalli
2012-06-08  6:38                   ` Michael Ellerman
2012-06-08  9:21                     ` Ananth N Mavinakayanahalli
2012-06-12  4:01                       ` Michael Ellerman
2012-06-12  4:52                         ` Ananth N Mavinakayanahalli
2012-06-06  9:23 ` [PATCH 1/2] uprobes: Pass probed vaddr to arch_uprobe_analyze_insn() Peter Zijlstra
2012-06-06  9:37   ` Ananth N Mavinakayanahalli
2012-06-06  9:40     ` Ingo Molnar
2012-06-06 10:22       ` Ananth N Mavinakayanahalli
2012-06-06 11:44       ` Srikar Dronamraju
2012-06-08  4:33         ` Ananth N Mavinakayanahalli
2012-06-06 15:08 ` Oleg Nesterov
2012-06-06 16:30   ` Srikar Dronamraju

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