selftests/bpf: Use PT_REGS_SYSCALL_REGS in bpf_syscall_macro

Ensure that PT_REGS_SYSCALL_REGS works correctly.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220209021745.2215452-4-iii@linux.ibm.com

diff --git a/tools/testing/selftests/bpf/progs/bpf_syscall_macro.c b/tools/testing/selftests/bpf/progs/bpf_syscall_macro.c
index f5c6ef2ff6d18867ed20c213792373f6426d0ebd..e7c622cb6a391b9cc2fa3bd7df1cb5fe9cb072ce 100644 (file)
--- a/tools/testing/selftests/bpf/progs/bpf_syscall_macro.c
+++ b/tools/testing/selftests/bpf/progs/bpf_syscall_macro.c
@@ -33,7 +33,7 @@ int BPF_KPROBE(handle_sys_prctl)
        if (pid != filter_pid)
                return 0;
 
-       real_regs = (struct pt_regs *)PT_REGS_PARM1(ctx);
+       real_regs = PT_REGS_SYSCALL_REGS(ctx);
 
        /* test for PT_REGS_PARM */