1/* 2 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * Copyright (c) 1997 by Apple Computer, Inc., all rights reserved 30 * Copyright (c) 1993 NeXT Computer, Inc. 31 * 32 */ 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/ioctl.h> 37#include <sys/tty.h> 38#include <sys/conf.h> 39#include <sys/kauth.h> 40#include <sys/ucred.h> 41#include <sys/proc_internal.h> 42#include <sys/user.h> 43#include <kern/task.h> 44#include <kern/thread.h> 45#include <vm/vm_map.h> 46#include <machine/machine_routines.h> 47 48/* XXX should be elsewhere (cpeak) */ 49extern void *get_bsduthreadarg(thread_t); 50extern int *get_bsduthreadrval(thread_t); 51extern void *find_user_regs(thread_t); 52 53/* 54 * copy a null terminated string from the kernel address space into 55 * the user address space. 56 * - if the user is denied write access, return EFAULT. 57 * - if the end of string isn't found before 58 * maxlen bytes are copied, return ENAMETOOLONG, 59 * indicating an incomplete copy. 60 * - otherwise, return 0, indicating success. 61 * the number of bytes copied is always returned in lencopied. 62 */ 63int 64copyoutstr(const void *from, user_addr_t to, size_t maxlen, size_t *lencopied) 65{ 66 size_t slen; 67 size_t len; 68 int error = 0; 69 70 slen = strlen(from) + 1; 71 if (slen > maxlen) 72 error = ENAMETOOLONG; 73 74 len = min(maxlen,slen); 75 if (copyout(from, to, len)) 76 error = EFAULT; 77 *lencopied = len; 78 79 return error; 80} 81 82 83/* 84 * copy a null terminated string from one point to another in 85 * the kernel address space. 86 * - no access checks are performed. 87 * - if the end of string isn't found before 88 * maxlen bytes are copied, return ENAMETOOLONG, 89 * indicating an incomplete copy. 90 * - otherwise, return 0, indicating success. 91 * the number of bytes copied is always returned in lencopied. 92 */ 93/* from ppc/fault_copy.c -Titan1T4 VERSION */ 94int 95copystr(const void *vfrom, void *vto, size_t maxlen, size_t *lencopied) 96{ 97 size_t l; 98 char const *from = (char const *) vfrom; 99 char *to = (char *) vto; 100 101 for (l = 0; l < maxlen; l++) { 102 if ((*to++ = *from++) == '\0') { 103 if (lencopied) 104 *lencopied = l + 1; 105 return 0; 106 } 107 } 108 if (lencopied) 109 *lencopied = maxlen; 110 return ENAMETOOLONG; 111} 112 113int 114copywithin(void *src, void *dst, size_t count) 115{ 116 bcopy(src,dst,count); 117 return 0; 118} 119 120void * 121get_bsduthreadarg(thread_t th) 122{ 123 struct uthread *ut; 124 ut = get_bsdthread_info(th); 125 return ut->uu_ap; 126} 127 128int * 129get_bsduthreadrval(thread_t th) 130{ 131struct uthread *ut; 132 133 ut = get_bsdthread_info(th); 134 return(&ut->uu_rval[0]); 135} 136