[PATCH 1/5] selftests: vdso: Fix vDSO name for powerpc

[Christophe Leroy]

Following error occurs when running vdso_test_correctness on powerpc:

~ # ./vdso_test_correctness
[WARN]  failed to find vDSO
[SKIP]  No vDSO, so skipping clock_gettime() tests
[SKIP]  No vDSO, so skipping clock_gettime64() tests
[RUN]   Testing getcpu...
[OK]    CPU 0: syscall: cpu 0, node 0

On powerpc, vDSO is neither called linux-vdso.so.1 nor linux-gate.so.1
but linux-vdso32.so.1 or linux-vdso64.so.1.

Also search those two names before giving up.

Fixes: c7e5789b24d3 ("kselftest: Move test_vdso to the vDSO test suite")
Signed-off-by: Christophe Leroy <christophe.le...@csgroup.eu>
---
 tools/testing/selftests/vDSO/vdso_test_correctness.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/testing/selftests/vDSO/vdso_test_correctness.c 
b/tools/testing/selftests/vDSO/vdso_test_correctness.c
index e691a3cf1491..cdb697ae8343 100644
--- a/tools/testing/selftests/vDSO/vdso_test_correctness.c
+++ b/tools/testing/selftests/vDSO/vdso_test_correctness.c
@@ -114,6 +114,12 @@ static void fill_function_pointers()
        if (!vdso)
                vdso = dlopen("linux-gate.so.1",
                              RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD);
+       if (!vdso)
+               vdso = dlopen("linux-vdso32.so.1",
+                             RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD);
+       if (!vdso)
+               vdso = dlopen("linux-vdso64.so.1",
+                             RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD);
        if (!vdso) {
                printf("[WARN]\tfailed to find vDSO\n");
                return;
-- 
2.44.0