kstack             57 kernel/proc.c        p->kstack = KSTACK((int) (p - proc));
kstack            147 kernel/proc.c    p->context.sp = p->kstack + PGSIZE;
kstack             99 kernel/proc.h    uint64 kstack;               // Virtual address of kernel stack
kstack            106 kernel/trap.c    p->trapframe->kernel_sp = p->kstack + PGSIZE; // process's kernel stack