Messages in this thread | ![/](/images/icornerl.gif) | | Date | Sun, 07 Jan 2007 09:25:00 +0100 | From | Rene Herman <> | Subject | Re: [DISCUSS] Making system calls more portable. |
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On 01/07/2007 09:15 AM, Amit Choudhary wrote:
> Well, system calls today are not portable mainly because they are > invoked using a number and it may happen that a number 'N' may refer > to systemcall_1() on one system/kernel and to systemcall_2() on > another system/kernel.
If we're limited to Linux kernels, this seems to not be the case. Great care is taken in keeping this userspace ABI stable -- new system calls are given new numbers. Old system calls may disappear (after a long grace period) but even then I don't believe the number is ever recycled.
If your discussion is not limited to Linux kernels, then sure, but being portable at that (sub-libc) level is asking too much.
> I hope that I made some sense.
Some, but your supposition seems unclear.
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