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#pragma once
#include "types.h"
struct proc;
struct argstr;
struct argvec;
long copy_from_user(void *kaddr, const void *uaddr, size_t nbytes);
long copy_to_user(void *uaddr, const void *kaddr, size_t nbytes);
long user_strdup(struct argstr *ustr, char **kstrp);
long user_vecdup(struct argvec *uvec, char ***kvecp);
long range_perm(struct proc *p, const void *vaddr, size_t len, int perm);
long addr_perm(struct proc *p, const void *vaddr, int perm);
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