/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1997 by Apple Computer, Inc., all rights reserved * Copyright (c) 1993 NeXT Computer, Inc. * */ #include <sys/param.h> #include <sys/systm.h> #include <sys/ioctl.h> #include <sys/tty.h> #include <sys/conf.h> #include <sys/kauth.h> #include <sys/ucred.h> #include <sys/proc_internal.h> #include <sys/user.h> #include <kern/task.h> #include <kern/thread.h> #include <vm/vm_map.h> /* XXX should be elsewhere (cpeak) */ extern int set_bsduthreadargs(thread_t, void *, void *); extern void *get_bsduthreadarg(thread_t); extern int *get_bsduthreadrval(thread_t); extern int *get_bsduthreadlowpridelay(thread_t); /* * copy a null terminated string from the kernel address space into * the user address space. * - if the user is denied write access, return EFAULT. * - if the end of string isn't found before * maxlen bytes are copied, return ENAMETOOLONG, * indicating an incomplete copy. * - otherwise, return 0, indicating success. * the number of bytes copied is always returned in lencopied. */ int copyoutstr(const void *from, user_addr_t to, size_t maxlen, size_t *lencopied) { size_t slen; size_t len; int error = 0; slen = strlen(from) + 1; if (slen > maxlen) error = ENAMETOOLONG; len = min(maxlen,slen); if (copyout(from, to, len)) error = EFAULT; *lencopied = len; return error; } /* * copy a null terminated string from one point to another in * the kernel address space. * - no access checks are performed. * - if the end of string isn't found before * maxlen bytes are copied, return ENAMETOOLONG, * indicating an incomplete copy. * - otherwise, return 0, indicating success. * the number of bytes copied is always returned in lencopied. */ /* from ppc/fault_copy.c -Titan1T4 VERSION */ int copystr(const void *vfrom, void *vto, size_t maxlen, size_t *lencopied) { size_t l; char const *from = (char const *) vfrom; char *to = (char *) vto; for (l = 0; l < maxlen; l++) { if ((*to++ = *from++) == '\0') { if (lencopied) *lencopied = l + 1; return 0; } } if (lencopied) *lencopied = maxlen; return ENAMETOOLONG; } int copywithin(void *src, void *dst, size_t count) { bcopy(src,dst,count); return 0; } int set_bsduthreadargs(thread_t th, void * pcb, __unused void *ignored_arg) { struct uthread * ut; struct proc *p = current_proc(); ut = get_bsdthread_info(th); ut->uu_ar0 = (int *)pcb; /* * Delayed binding of thread credential to process credential. * * XXX This doesn't really belong here, but the i386 code has a * XXX number of seemingly gratuitous structural differences that * XXX make this the most appropriate place to do the work. */ if (ut->uu_ucred != p->p_ucred && (ut->uu_flag & UT_SETUID) == 0) { kauth_cred_t old = ut->uu_ucred; proc_lock(p); ut->uu_ucred = p->p_ucred; kauth_cred_ref(ut->uu_ucred); proc_unlock(p); if (old != NOCRED) kauth_cred_rele(old); } return(1); } void * get_bsduthreadarg(thread_t th) { struct uthread *ut; ut = get_bsdthread_info(th); return((void *)(ut->uu_arg)); } int * get_bsduthreadrval(thread_t th) { struct uthread *ut; ut = get_bsdthread_info(th); return(&ut->uu_rval[0]); } int * get_bsduthreadlowpridelay(thread_t th) { struct uthread *ut; ut = get_bsdthread_info(th); return(&ut->uu_lowpri_delay); }