arch_stack
void arch_load_user_iframe(arch_stack* stackHeader, iframe* frame)
arch_stack* stackHeader = (arch_stack*)thread->kernel_stack_top - 1;
arch_stack* stackHeader = (arch_stack*)thread_get_current_thread()->kernel_stack_top - 1;
DEFINE_OFFSET_MACRO(ARCH_STACK, arch_stack, thread);