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

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Message-Id: <1209445616.18023.133.camel@pasglop>
Date:	Tue, 29 Apr 2008 15:06:56 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Rik van Riel <riel@...hat.com>
Cc:	David Miller <davem@...emloft.net>, roland@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: PTRACE_{READ,WRITE}{TEXT,DATA}


> Strange, changing access_process_vm on Fedora 9 made gdb able to
> see video memory that the X server had mmapped.
> 
> Are you sure gdb behaves as you suggest?  
> 
> On x86 my patch seems to work as I expected...

Because /proc/<pid>/mem also uses access_process_vm(). See
fs/proc/base.c

Cheers,
Ben.


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