[OE-core] [PATCH][RFC] pseudo: intercept syscall() and return ENOTSUP for renameat2

[Khem Raj]

On 4/4/18 2:45 PM, Seebs wrote:
> On Wed, 4 Apr 2018 14:28:11 -0700
> Khem Raj <raj.khem at gmail.com> wrote:
> 
>> what is the performance impact of adding another stack frame and
>> function call in the chain here. Do we have data ?
> 
> Very close to unmeasurable, because *almost nothing ever uses syscall*.
> 
> This is used only for the case where someone is explicitly calling
> syscall(), not for any other system call use case. And my
> implementation (which is not the same as this one) also overrides the
> wrapper generation, so there's no standard pseudo wrapper overhead
> (which is several times larger and involves mutexes and signal mask
> changing), it's just passing the call on unless it's SYS_renameat2.
> 

Thanks for this

> -s
>