link: use PlatformPrefix in TestKprobeMultiProgramCall

The test has started failing in arm64 CI because it can't
find __do_sys_getpid anymore.
Looking at the test it seems like we aren't using the platform
prefix for the syscall wrapper appropriately.
It's unclear why this used to work.

Always use the correct prefix.

Fixes: #1888
Signed-off-by: Lorenz Bauer <[email protected]>

Author: lmb

link/kprobe_multi_test.go

@@ -10,6 +10,7 @@ import (
 	"github.com/go-quicktest/qt"
 
 	"github.com/cilium/ebpf"
+	"github.com/cilium/ebpf/internal/linux"
 	"github.com/cilium/ebpf/internal/testutils"
 	"github.com/cilium/ebpf/internal/unix"
 )
@@ -100,9 +101,11 @@ func TestKprobeMultiProgramCall(t *testing.T) {
 
 	m, p := newUpdaterMapProg(t, ebpf.Kprobe, ebpf.AttachTraceKprobeMulti)
 
+	// Use actual syscall names with platform prefix.
 	// For simplicity, just assert the increment happens with any symbol in the array.
+	prefix := linux.PlatformPrefix()
 	opts := KprobeMultiOptions{
-		Symbols: []string{"__do_sys_getpid", "__do_sys_gettid"},
+		Symbols: []string{prefix + "sys_getpid", prefix + "sys_gettid"},
 	}
 	km, err := KprobeMulti(p, opts)
 	if err != nil {