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      1 /* $NetBSD: copy.c,v 1.12 2020/06/30 16:20:02 maxv Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2007 Jared D. McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: copy.c,v 1.12 2020/06/30 16:20:02 maxv Exp $");
     31 
     32 #define	__UFETCHSTORE_PRIVATE
     33 #define	__UCAS_PRIVATE
     34 
     35 #include <sys/types.h>
     36 #include <sys/systm.h>
     37 #include <machine/thunk.h>
     38 
     39 /* XXX until strnlen(3) has been added to the kernel, we *could* panic on it */
     40 #define strnlen(str, maxlen) uimin(strlen((str)), maxlen)
     41 
     42 int
     43 copyin(const void *uaddr, void *kaddr, size_t len)
     44 {
     45 //	thunk_printf("copyin uaddr %p, kaddr %p, len %d\n", uaddr, kaddr, (int) len);
     46 	memcpy(kaddr, uaddr, len);
     47 	return 0;
     48 }
     49 
     50 int
     51 copyout(const void *kaddr, void *uaddr, size_t len)
     52 {
     53 //	thunk_printf("copyout kaddr %p, uaddr %p, len %d\n", kaddr, uaddr, (int) len);
     54 	memcpy(uaddr, kaddr, len);
     55 	return 0;
     56 }
     57 
     58 int
     59 copyinstr(const void *uaddr, void *kaddr, size_t len, size_t *done)
     60 {
     61 	len = uimin(strnlen(uaddr, len), len) + 1;
     62 	strncpy(kaddr, uaddr, len);
     63 	if (done)
     64 		*done = len;
     65 	return 0;
     66 }
     67 
     68 int
     69 copyoutstr(const void *kaddr, void *uaddr, size_t len, size_t *done)
     70 {
     71 	len = uimin(strnlen(kaddr, len), len) + 1;
     72 	strncpy(uaddr, kaddr, len);
     73 	if (done)
     74 		*done = len;
     75 	return 0;
     76 }
     77 
     78 int
     79 kcopy(const void *src, void *dst, size_t len)
     80 {
     81 	memcpy(dst, src, len);
     82 #ifdef DEBUG
     83 	if (memcmp(dst, src, len) != 0)
     84 		panic("kcopy not finished correctly\n");
     85 #endif
     86 	return 0;
     87 }
     88 
     89 int
     90 _ufetch_8(const uint8_t *uaddr, uint8_t *valp)
     91 {
     92 	*valp = *uaddr;
     93 	return 0;
     94 }
     95 
     96 int
     97 _ufetch_16(const uint16_t *uaddr, uint16_t *valp)
     98 {
     99 	*valp = *uaddr;
    100 	return 0;
    101 }
    102 
    103 int
    104 _ufetch_32(const uint32_t *uaddr, uint32_t *valp)
    105 {
    106 	*valp = *uaddr;
    107 	return 0;
    108 }
    109 
    110 #ifdef _LP64
    111 int
    112 _ufetch_64(const uint64_t *uaddr, uint64_t *valp)
    113 {
    114 	*valp = *uaddr;
    115 	return 0;
    116 }
    117 #endif /* _LP64 */
    118 
    119 int
    120 _ustore_8(uint8_t *uaddr, uint8_t val)
    121 {
    122 	*uaddr = val;
    123 	return 0;
    124 }
    125 
    126 int
    127 _ustore_16(uint16_t *uaddr, uint16_t val)
    128 {
    129 	*uaddr = val;
    130 	return 0;
    131 }
    132 
    133 int
    134 _ustore_32(uint32_t *uaddr, uint32_t val)
    135 {
    136 	*uaddr = val;
    137 	return 0;
    138 }
    139 
    140 #ifdef _LP64
    141 int
    142 _ustore_64(uint64_t *uaddr, uint64_t val)
    143 {
    144 	*uaddr = val;
    145 	return 0;
    146 }
    147 #endif /* _LP64 */
    148