Disable cross-program invocations for OperatingMode::Stable (#11272)

programs/bpf_loader/src/lib.rs

@@ -326,6 +326,9 @@ mod tests {
         fn get_logger(&self) -> Rc<RefCell<dyn Logger>> {
             Rc::new(RefCell::new(self.mock_logger.clone()))
         }
+        fn is_cross_program_supported(&self) -> bool {
+            true
+        }
     }
     #[derive(Debug, Default, Clone)]
     pub struct MockLogger {

programs/bpf_loader/src/syscalls.rs

@@ -794,6 +794,7 @@ fn call<'a>(
         message_processor.add_program(*program_id, *process_instruction);
     }
     message_processor.add_loader(bpf_loader::id(), crate::process_instruction);
+    message_processor.set_cross_program_support(invoke_context.is_cross_program_supported());
 
     #[allow(clippy::deref_addrof)]
     match message_processor.process_cross_program_instruction(