Re: [PATCH v2 16/17] selftests: vdso: Make VDSO function call more generic

Jason A. Donenfeld
2024-08-26T07:38:09Z

On Thu, Aug 22, 2024 at 09:13:24AM +0200, Christophe Leroy wrote:
> On powerpc, a call to a VDSO function is not a standard C function
> call. Unlike x86 that returns a negated error code in case of an
> error, powerpc sets CR[SO] and returns the error code as a
> positive value.
>
> So use a macro called VDSO_CALL() which takes a pointer to the
> function to call, the number of arguments and the arguments.

You'll probably want to move to VDSO_CALL() for the whole test suite,
not just the getrandom one, right?