setarch treats all x86 variants as i686?

Phillip Susi

author

2014-02-06 20:53 UTC #0 lore raw

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setarch i486
uname -m
i686

Is this a bug?

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Mike Frysinger

2014-02-08 11:26 UTC #1 lore raw

Quoted 5 lines · On Thursday, February 06, 2014 15:53:52 Phillip Susi wrote:

setarch i486
uname -m
i686
Is this a bug?

no. setarch is merely calling the kernel and the kernel is doing this. see man personality for more details.
-mike

Phillip Susi

author

2014-02-08 15:48 UTC #2 lore raw

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Quoted 2 lines · Mike Frysinger

no. setarch is merely calling the kernel and the kernel is doing this. see man personality for more details.

Ahh, looking at the syscall it is clear that there is only a generic linux 32 vs 64 bit flag, so setarch must be aliasing ix86 to the generic 32 bit flag. The man page probably should be a little more clear that these aliases all map to the same thing.

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Phillip Susi

author

2014-02-08 15:48 UTC #3 lore raw

In reply to Mike Frysinger

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On 02/08/2014 06:26 AM, Mike Frysinger wrote:

Ahh, looking at the syscall it is clear that there is only a generic linux 32 vs 64 bit flag, so setarch must be aliasing ix86 to the generic 32 bit flag. The man page probably should be a little more clear that these aliases all map to the same thing.

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