Le 26/08/2024 à 09:37, Jason A. Donenfeld a écrit :

On Thu, Aug 22, 2024 at 09:13:24AM +0200, Christophe Leroy wrote:

quoted

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?

Yes indeed, the following needs it as well:

vdso_test_abi.c
vdso_test_getcpu.c
vdso_test_gettimeofday.c
vdso_test_correctness.c

Christophe