IA-32 on x86-64

IA-32 on x86-64

[John Richard Moser]

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Does anyone know how to check if I'm running an IA-32 process on x86-64?
 More importantly, how do I tell how big the user VM space is for
current?  Like 3GiB for x86 and who knows what (87GiB?  192GiB?) for
x86-64 and however much for sparc/ppc ....

- --
All content of all messages exchanged herein are left in the
Public Domain, unless otherwise explicitly stated.

    Creative brains are a valuable, limited resource. They shouldn't be
    wasted on re-inventing the wheel when there are so many fascinating
    new problems waiting out there.
                                                 -- Eric Steven Raymond

    We will enslave their women, eat their children and rape their
    cattle!
                  -- Bosc, Evil alien overlord from the fifth dimension
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Re: IA-32 on x86-64

[Jan Engelhardt]

>
>Does anyone know how to check if I'm running an IA-32 process on x86-64?

printf("%d\n", sizeof(void *)) should report 4 with 32-bit code.

> More importantly, how do I tell how big the user VM space is for
>current?

Find the bottom address of the stack. (This is left as an exercise.)


Jan Engelhardt
-- 

Re: IA-32 on x86-64

[Kyle McMartin]

On Sat, May 20, 2006 at 09:03:11AM -0400, John Richard Moser wrote:
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> 
> Does anyone know how to check if I'm running an IA-32 process on x86-64?

is_compat_task()

>  More importantly, how do I tell how big the user VM space is for
> current?  Like 3GiB for x86 and who knows what (87GiB?  192GiB?) for
> x86-64 and however much for sparc/ppc ....

TASK_SIZE

You should probably do your own work instead of posting questions everytime
you hit something you'd have to do a little bit of searching for.

--

Re: IA-32 on x86-64

[John Richard Moser]

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Kyle McMartin wrote:
> On Sat, May 20, 2006 at 09:03:11AM -0400, John Richard Moser wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>
>> Does anyone know how to check if I'm running an IA-32 process on x86-64?
> 
> is_compat_task()
> 
>>  More importantly, how do I tell how big the user VM space is for
>> current?  Like 3GiB for x86 and who knows what (87GiB?  192GiB?) for
>> x86-64 and however much for sparc/ppc ....
> 
> TASK_SIZE
> 
> You should probably do your own work instead of posting questions everytime
> you hit something you'd have to do a little bit of searching for.
> 

Noted.  As of late I've had the excuse that I've posted my last question
just before I had to go to bed so everyone else would search for the
answer while I sleep; but point taken ;)

> --
> 

- --
All content of all messages exchanged herein are left in the
Public Domain, unless otherwise explicitly stated.

    Creative brains are a valuable, limited resource. They shouldn't be
    wasted on re-inventing the wheel when there are so many fascinating
    new problems waiting out there.
                                                 -- Eric Steven Raymond

    We will enslave their women, eat their children and rape their
    cattle!
                  -- Bosc, Evil alien overlord from the fifth dimension
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