uvmalloc          165 kernel/defs.h  uint64          uvmalloc(pagetable_t, uint64, uint64, int);
uvmalloc           65 kernel/exec.c      if((sz1 = uvmalloc(pagetable, sz, ph.vaddr + ph.memsz, flags2perm(ph.flags))) == 0)
uvmalloc           83 kernel/exec.c    if((sz1 = uvmalloc(pagetable, sz, sz + (USERSTACK+1)*PGSIZE, PTE_W)) == 0)
uvmalloc          267 kernel/proc.c      if((sz = uvmalloc(p->pagetable, sz, sz + n, PTE_W)) == 0) {