+
+void
+protect_control_stack_guard_page(os_thread_t t_id, int protect_p) {
+ struct thread *th = find_thread_by_os_thread(t_id);
+ os_protect(CONTROL_STACK_GUARD_PAGE(th),
+ os_vm_page_size,protect_p ?
+ (OS_VM_PROT_READ|OS_VM_PROT_EXECUTE) : OS_VM_PROT_ALL);
+}
+
+void
+protect_control_stack_return_guard_page(os_thread_t t_id, int protect_p) {
+ struct thread *th = find_thread_by_os_thread(t_id);
+ os_protect(CONTROL_STACK_RETURN_GUARD_PAGE(th),
+ os_vm_page_size,protect_p ?
+ (OS_VM_PROT_READ|OS_VM_PROT_EXECUTE) : OS_VM_PROT_ALL);
+}