1 /*
2 * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
3 */
4 /*
5 * Copyright (c) 1997 by Apple Computer, Inc., all rights reserved
6 * Copyright (c) 1993 NeXT Computer, Inc.
7 *
8 */
9
10 #include <sys/cdefs.h>
11 #include <sys/param.h>
12 #include <sys/systm.h>
13 #include <sys/ioctl.h>
14 #include <sys/tty.h>
15 #include <sys/conf.h>
16 #include <sys/kauth.h>
17 #include <sys/ucred.h>
18 #include <sys/proc_internal.h>
19 #include <sys/sysproto.h>
20 #include <sys/user.h>
21 #include <kern/task.h>
22 #include <kern/thread.h>
23 #include <vm/vm_map.h>
24 #include <arm/machine_routines.h>
25
26
27 /*
28 * copy a null terminated string from the kernel address space into the user
29 * address space. - if the user is denied write access, return EFAULT. - if
30 * the end of string isn't found before maxlen bytes are copied, return
31 * ENAMETOOLONG, indicating an incomplete copy. - otherwise, return 0,
32 * indicating success. the number of bytes copied is always returned in
33 * lencopied.
34 */
35 int
copyoutstr(const void * from,user_addr_t to,size_t maxlen,size_t * lencopied)36 copyoutstr(const void *from, user_addr_t to, size_t maxlen, size_t * lencopied)
37 {
38 size_t slen;
39 size_t len;
40 int error = copyoutstr_prevalidate(from, to, maxlen);
41
42 if (__improbable(error)) {
43 return error;
44 }
45
46 slen = strlen(from) + 1;
47 if (slen > maxlen) {
48 error = ENAMETOOLONG;
49 }
50
51 len = MIN(maxlen, slen);
52 if (copyout(from, to, len)) {
53 error = EFAULT;
54 }
55 *lencopied = len;
56
57 return error;
58 }
59
60
61 /*
62 * copy a null terminated string from one point to another in the kernel
63 * address space. - no access checks are performed. - if the end of string
64 * isn't found before maxlen bytes are copied, return ENAMETOOLONG,
65 * indicating an incomplete copy. - otherwise, return 0, indicating success.
66 * the number of bytes copied is always returned in lencopied.
67 */
68 /* from ppc/fault_copy.c -Titan1T4 VERSION */
69 int
copystr(const void * vfrom,void * vto,size_t maxlen,size_t * lencopied)70 copystr(const void *vfrom, void *vto, size_t maxlen, size_t * lencopied)
71 {
72 size_t l;
73 char const *from = (char const *) vfrom;
74 char *to = (char *) vto;
75
76 for (l = 0; l < maxlen; l++) {
77 if ((*to++ = *from++) == '\0') {
78 if (lencopied) {
79 *lencopied = l + 1;
80 }
81 return 0;
82 }
83 }
84 if (lencopied) {
85 *lencopied = maxlen;
86 }
87 return ENAMETOOLONG;
88 }
89
90 int
copywithin(void * src,void * dst,size_t count)91 copywithin(void *src, void *dst, size_t count)
92 {
93 bcopy(src, dst, count);
94 return 0;
95 }
96
97
98 int
objc_bp_assist_cfg_np(__unused struct proc * p,__unused struct objc_bp_assist_cfg_np_args * uap,__unused int * retvalp)99 objc_bp_assist_cfg_np(
100 __unused struct proc *p,
101 __unused struct objc_bp_assist_cfg_np_args *uap,
102 __unused int *retvalp)
103 {
104 int ret = KERN_FAILURE;
105
106
107 return ret;
108 }
109