From: mandeepsandhu.chd@gmail.com (Mandeep Sandhu)
To: kernelnewbies@lists.kernelnewbies.org
Subject: How to identity processor architecture
Date: Thu, 27 Jan 2011 12:54:50 +0530 [thread overview]
Message-ID: <AANLkTimCrpsBZ5yqSoKj=4zgt0xWczgqu6o4f-fShrPA@mail.gmail.com> (raw)
In-Reply-To: <DD57B7CE-5EDF-46A1-B135-74A75F7932F7@cs.ucsd.edu>
> I guess a 64bit processor does need 64bit addresses to reference memory. But
> at the same time, if 32 bit programs are to run unmodified on 64 bit
> architectures there needs to be ways in which 32bit pointers can still work.
> So, I am almost 100% sure that compiling 32bit code, even on a 64bit
> processor, should yield 4 for sizeof(void*)
You are 100% right. Tried this on 2 laptops:
printf("Is this a %s-bit machine?\n", ((sizeof(void*) == 4) ? "32" : "64"));
32-Bit ubuntu (10.10) on 64-bit proc:
"Is this a 32-bit machine?"
64-Bit ubuntu (10.10) on 64-bit proc:
"Is this a 64-bit machine?"
Regards,
-mandeep
> Enrico Granata
> Computer Science & Engineering Department (EBU3B) -?Room 3240
> office phone 858 534 9914
> University of California, San Diego
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
next prev parent reply other threads:[~2011-01-27 7:24 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-27 6:07 How to identity processor architecture prabhu
2011-01-27 6:26 ` Enrico Granata
2011-01-27 6:31 ` arun kumar
2011-01-27 6:40 ` prabhu
2011-01-27 6:45 ` Mulyadi Santosa
2011-01-27 6:54 ` Enrico Granata
2011-01-27 7:15 ` dharmvir kumar
2011-01-27 7:24 ` Mandeep Sandhu [this message]
2011-01-27 8:20 ` prabhu
2011-01-27 8:22 ` Enrico Granata
2011-01-27 9:53 ` prabhu
2011-01-27 11:15 ` Henry Gebhardt
2011-01-27 11:32 ` Thirugnanam Balamurugan
2011-01-27 11:44 ` Pravin Shedage
2011-01-27 12:33 ` prabhu
2011-01-27 9:23 ` Busybox for powerpc doesnt compile Giriprasad Deviprasad
2011-01-27 10:11 ` yy Hong
2011-01-27 13:47 ` Anuz Pratap Singh Tomar
2011-01-29 5:50 ` Giriprasad Deviprasad
2011-01-30 13:23 ` Giriprasad Deviprasad
2011-01-27 7:07 ` How to identity processor architecture prabhu
2011-01-27 7:13 ` Mulyadi Santosa
2011-01-27 19:27 ` mindentropy
2011-01-27 20:01 ` Denis Kirjanov
-- strict thread matches above, loose matches on Subject: below --
2011-01-27 3:28 Added about new kernel on old distro (was Re: most likely, i'll be giving a kernel talk at ottawa LUG next week) Mulyadi Santosa
2011-01-27 6:09 ` How to identity processor architecture prabhu
2011-01-26 18:08 most likely, i'll be giving a kernel talk at ottawa LUG next week Robert P. J. Day
2011-01-27 6:17 ` How to identity processor architecture prabhu
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