linux-kernel - Re: [PATCH 2/2] uprobes/powerpc: Make use of generic routines to enable single step

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Message-ID: <50B44808.3000704@in.ibm.com>
Date:	Tue, 27 Nov 2012 10:26:40 +0530
From:	"Suzuki K. Poulose" <suzuki@...ibm.com>
To:	Oleg Nesterov <oleg@...hat.com>
CC:	bigeasy@...utronix.de, ananth@...ibm.com,
	srikar@...ux.vnet.ibm.com, peterz@...radead.org,
	benh@...nel.crashing.org, mingo@...e.hu, anton@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] uprobes/powerpc: Make use of generic routines to
 enable single step

On 11/26/2012 10:31 PM, Oleg Nesterov wrote:
> On 11/26, Suzuki K. Poulose wrote:
>>
>> @@ -121,8 +125,11 @@ int arch_uprobe_post_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
>>   	 * to be executed.
>>   	 */
>>   	regs->nip = utask->vaddr + MAX_UINSN_BYTES;
>> +	regs->msr = utask->autask.saved_msr;
>> +#ifdef CONFIG_PPC_ADV_DEBUG_REGS
>> +	mtspr(SPRN_DBCR0, utask->autask.saved_dbcr);
>> +#endif
>>
>> -	user_disable_single_step(current);
>
> Don't we need the same change in arch_uprobe_abort_xol() ?
Yes, we do. Thanks for catching that. I will fix it.

Thanks for the review.

Suzuki

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