X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/8ad349bb6ed4a0be06e34c92be0d98b92e078db4..36401178fd6817c043cc00b0c00c7f723e58efae:/bsd/kern/bsd_stubs.c diff --git a/bsd/kern/bsd_stubs.c b/bsd/kern/bsd_stubs.c index 5ea86fd66..657d9fde6 100644 --- a/bsd/kern/bsd_stubs.c +++ b/bsd/kern/bsd_stubs.c @@ -1,31 +1,29 @@ /* - * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved. + * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * @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. * - * 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. - * - * 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 + * 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@ */ #include #include @@ -39,6 +37,18 @@ #include #include /* for SET */ #include +#include +#include + +/* XXX these should be in a common header somwhere, but aren't */ +extern int chrtoblk_set(int, int); +extern vm_offset_t kmem_mb_alloc(vm_map_t, int); + +/* XXX most of these just exist to export; there's no good header for them*/ +void pcb_synch(void); +int issingleuser(void); +void tbeproc(void *); + /* Just to satisfy pstat command */ int dmmin, dmmax, dmtext; @@ -49,7 +59,7 @@ kmem_mb_alloc(vm_map_t mbmap, int size) vm_offset_t addr; if (kernel_memory_allocate(mbmap, &addr, size, 0, - KMA_NOPAGEWAIT|KMA_KOBJECT) == KERN_SUCCESS) + KMA_NOPAGEWAIT|KMA_KOBJECT|KMA_LOMEM) == KERN_SUCCESS) return(addr); else return(0); @@ -70,14 +80,14 @@ current_proc(void) /* Never returns a NULL */ struct uthread * ut; struct proc *p; - thread_t thr_act = current_thread(); + thread_t thread = current_thread(); - ut = (struct uthread *)get_bsdthread_info(thr_act); + ut = (struct uthread *)get_bsdthread_info(thread); if (ut && (ut->uu_flag & UT_VFORK) && ut->uu_proc) { p = ut->uu_proc; - if ((p->p_flag & P_INVFORK) == 0) + if ((p->p_lflag & P_LINVFORK) == 0) panic("returning child proc not under vfork"); - if (p->p_vforkact != (void *)thr_act) + if (p->p_vforkact != (void *)thread) panic("returning child proc which is not cur_act"); return(p); } @@ -92,8 +102,6 @@ current_proc(void) /* Device switch add delete routines */ -extern int nblkdev, nchrdev; - struct bdevsw nobdev = NO_BDEVICE; struct cdevsw nocdev = NO_CDEVICE; /* @@ -211,15 +219,28 @@ cdevsw_isfree(int index) * if index is -1, find a free slot to add * else see whether the slot is free * return the major number that is used else -1 + * + * NOTE: In practice, -1 is unusable, since there are kernel internal + * devices that call this function with absolute index values, + * which will stomp on free-slot based assignments that happen + * before them. Therefore, if index is negative, we start + * looking for a free slot at the absolute value of index, + * instead of starting at 0 (lets out slot 1, but that's one + * of the problem slots down low - the vndevice). -12 is + * currently a safe starting point. */ int cdevsw_add(int index, struct cdevsw * csw) { struct cdevsw *devsw; - if (index == -1) { - devsw = cdevsw; - for(index=0; index < nchrdev; index++, devsw++) { + if (index < 0) { + if (index == -1) + index = 0; /* historical behaviour; XXX broken */ + else + index = -index; /* start at least this far up in the table */ + devsw = &cdevsw[index]; + for(; index < nchrdev; index++, devsw++) { if(memcmp((char *)devsw, (char *)&nocdev, sizeof(struct cdevsw)) == 0) @@ -259,8 +280,6 @@ cdevsw_remove(int index, struct cdevsw * csw) static int cdev_set_bdev(int cdev, int bdev) { - extern int chrtoblk_add(int cdev, int bdev); - return (chrtoblk_set(cdev, bdev)); } @@ -278,11 +297,20 @@ cdevsw_add_with_bdev(int index, struct cdevsw * csw, int bdev) return (index); } +#include /* for PE_parse_boot_arg */ + +/* + * Notes: This function is used solely by UFS, apparently in an effort + * to work around an issue with single user mounts. + * + * It's not technically correct to reference PE_parse_boot_arg() + * from this file. + */ +int issingleuser(void) { char namep[16]; - if (PE_parse_boot_arg("-s", namep)) { return(1); } else { @@ -290,13 +318,13 @@ issingleuser(void) } } -void * +void tbeproc(void *procp) { struct proc *p = procp; if (p) - SET(p->p_flag, P_TBE); + OSBitOrAtomic(P_TBE, (UInt32 *)&p->p_flag); return; }