linprocfs proc/pid/mem Bad address

[Fernando Apesteguía]

On Fri, Feb 26, 2010 at 12:12 PM, Kostik Belousov <kostikbel at gmail.com> wrote:
> On Fri, Feb 26, 2010 at 12:06:07PM +0100, Fernando Apestegu?a wrote:
>> On Fri, Feb 26, 2010 at 11:41 AM, Kostik Belousov <kostikbel at gmail.com> wrote:
>> > On Thu, Feb 25, 2010 at 10:54:02PM +0100, Fernando Apestegu?a wrote:
>> >> Why /compat/linux/proc/<pid>/mem always reports "Bad address" ?
>> >>
>> >> I'm using 8.0-RELEASE-p2
>> >>
>> >> Thanks in advance.
>> >
>> > Reports when ? What is the operation you doing that causes this ?
>>
>> Oops, sorry. When trying to cat the file for example. In Linux the
>> error reported is something like
>> "No such process"
>>
>> >
>
> mem provides access to the target process virtual address space as file.
> Reading from the file at some offset returns corresponding sequence of
> bytes present in the process virtual address space starting at the offset.
> Since cat starts read at the file offset 0, and (almost) no processes
> map the page at the address 0, you get this error.

Thanks for the clarification.

>