r_scause           53 kernel/trap.c    if(r_scause() == 8){
r_scause           71 kernel/trap.c      printf("usertrap(): unexpected scause 0x%lx pid=%d\n", r_scause(), p->pid);
r_scause          140 kernel/trap.c    uint64 scause = r_scause();
r_scause          187 kernel/trap.c    uint64 scause = r_scause();