linux-kernel - Re: PTRACE_{READ,WRITE}{TEXT,DATA}

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Message-Id: <1209513990.18023.199.camel@pasglop>
Date:	Wed, 30 Apr 2008 10:06:30 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Roland McGrath <roland@...hat.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Rik van Riel <riel@...hat.com>
Subject: Re: PTRACE_{READ,WRITE}{TEXT,DATA}


On Tue, 2008-04-29 at 15:07 -0700, Roland McGrath wrote:
> I don't see any sense in adding that.  Using /proc/pid/mem is already the
> "efficient" API for this known to userland.  I don't think keeping the fd
> around for that is any great burden, and if you do then the one pread64
> call is just as efficient as one ptrace call to do the same thing.

Yup, I didn't know gdb used /proc/pid/mem to be honest ... as long as it
goes through access_process_vm(), I'm fine anyway.

Cheers,
Ben.

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