X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/5d5c5d0d5b79ade9a973d55186ffda2638ba2b6e..refs/heads/master:/bsd/dev/i386/stubs.c diff --git a/bsd/dev/i386/stubs.c b/bsd/dev/i386/stubs.c index 512c730b1..aeb74b11f 100644 --- a/bsd/dev/i386/stubs.c +++ b/bsd/dev/i386/stubs.c @@ -1,31 +1,29 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved. * - * @APPLE_LICENSE_OSREFERENCE_HEADER_START@ - * - * This file contains Original Code and/or Modifications of Original Code - * as defined in and that are subject to the Apple Public Source License - * Version 2.0 (the 'License'). You may not use this file except in - * compliance with the License. The rights granted to you under the - * License may not be used to create, or enable the creation or - * redistribution of, unlawful or unlicensed copies of an Apple operating - * system, or to circumvent, violate, or enable the circumvention or - * violation of, any terms of an Apple operating system software license - * agreement. + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ and read it before using this - * file. + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. * - * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. - * Please see the License for the specific language governing rights and + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and * limitations under the License. * - * @APPLE_LICENSE_OSREFERENCE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1997 by Apple Computer, Inc., all rights reserved @@ -47,13 +45,7 @@ #include #include -/* XXX should be elsewhere (cpeak) */ -extern struct proc *i386_current_proc(void); -extern void *get_bsduthreadarg(thread_t); -extern int *get_bsduthreadrval(thread_t); -extern void *find_user_regs(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. @@ -66,25 +58,27 @@ extern void *find_user_regs(thread_t); int copyoutstr(const void *from, user_addr_t to, size_t maxlen, size_t *lencopied) { - size_t slen; - size_t len; - int error = 0; + size_t slen; + size_t len; + int error = 0; slen = strlen(from) + 1; - if (slen > maxlen) + if (slen > maxlen) { error = ENAMETOOLONG; + } - len = min(maxlen,slen); - if (copyout(from, to, len)) + 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 +/* + * 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 @@ -97,85 +91,27 @@ copyoutstr(const void *from, user_addr_t to, size_t maxlen, size_t *lencopied) 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; + 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) + if (lencopied) { *lencopied = l + 1; + } return 0; } } - if (lencopied) + if (lencopied) { *lencopied = maxlen; + } return ENAMETOOLONG; } int copywithin(void *src, void *dst, size_t count) { - bcopy(src,dst,count); + bcopy(src, dst, count); return 0; } - -/* - * This is just current_proc() from bsd/kern/bsd_stubs.c, but instead of - * returning kernproc in the non-vfork() case, it can return NULL. This is - * needed because the system call entry point is in osfmk/i386/bsd_i386.c - * instead of bsd/dev/i386, and therefore cannot see some BSD thread - * internals. We need to distinguish kernproc defaulting in the vfork and - * non-vfork cases vs. actually being the real process context. - */ -struct proc * -i386_current_proc(void) -{ - struct uthread * ut; - struct proc *p; - thread_t thr_act = current_thread(); - - ut = (struct uthread *)get_bsdthread_info(thr_act); - if (ut && (ut->uu_flag & UT_VFORK)) { - if (ut->uu_proc) { - p = ut->uu_proc; - if ((p->p_flag & P_INVFORK) == 0) - panic("returning child proc not under vfork"); - if (p->p_vforkact != (void *)thr_act) - panic("returning child proc which is not cur_act"); - return(p); - } else { - return (kernproc); - } - } - - /* Not in vfork - may return NULL */ - p = (struct proc *)get_bsdtask_info(current_task()); - - return (p); -} - -void * -get_bsduthreadarg(thread_t th) -{ - void *arg_ptr; - struct uthread *ut; - - ut = get_bsdthread_info(th); - - if (ml_thread_is64bit(th) == TRUE) - arg_ptr = (void *)saved_state64(find_user_regs(th)); - else - arg_ptr = (void *)(ut->uu_arg); - - return(arg_ptr); -} - -int * -get_bsduthreadrval(thread_t th) -{ - struct uthread *ut; - - ut = get_bsdthread_info(th); - return(&ut->uu_rval[0]); -}