void NAKED asm_switch_context(cpu_stack_t **new_sp, cpu_stack_t **old_sp)
{
register cpu_stack_t **_new_sp asm("r0") = new_sp;
void NAKED asm_switch_context(cpu_stack_t **new_sp, cpu_stack_t **old_sp)
{
register cpu_stack_t **_new_sp asm("r0") = new_sp;