selftests/bpf: Fix test_lsm on s390x

Use syscall macros to access the setdomainname() arguments; currently
the code uses gprs[2] instead of orig_gpr2 for the first argument.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/r/20230128000650.1516334-16-iii@linux.ibm.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/tools/testing/selftests/bpf/progs/lsm.c b/tools/testing/selftests/bpf/progs/lsm.c
index d8d8af6..dc93887 100644 (file)
--- a/tools/testing/selftests/bpf/progs/lsm.c
+++ b/tools/testing/selftests/bpf/progs/lsm.c
@@ -6,9 +6,10 @@
 
 #include "bpf_misc.h"
 #include "vmlinux.h"
+#include <bpf/bpf_core_read.h>
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_tracing.h>
-#include  <errno.h>
+#include <errno.h>
 
 struct {
        __uint(type, BPF_MAP_TYPE_ARRAY);
@@ -164,8 +165,8 @@ int copy_test = 0;
 SEC("fentry.s/" SYS_PREFIX "sys_setdomainname")
 int BPF_PROG(test_sys_setdomainname, struct pt_regs *regs)
 {
-       void *ptr = (void *)PT_REGS_PARM1(regs);
-       int len = PT_REGS_PARM2(regs);
+       void *ptr = (void *)PT_REGS_PARM1_SYSCALL(regs);
+       int len = PT_REGS_PARM2_SYSCALL(regs);
        int buf = 0;
        long ret;