/* $NetBSD: subr_kobj_vfs.c,v 1.13 2026/01/04 03:19:33 riastradh Exp $ */ /*- * Copyright (c) 2008 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software developed for The NetBSD Foundation * by Andrew Doran. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /*- * Copyright (c) 1998-2000 Doug Rabson * Copyright (c) 2004 Peter Wemm * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Kernel loader vfs routines. */ #include <sys/kobj_impl.h> #include <sys/sdt.h> #ifdef _KERNEL_OPT #include "opt_modular.h" #endif #ifdef MODULAR #include <sys/param.h> #include <sys/fcntl.h> #include <sys/module.h> #include <sys/namei.h> #include <sys/vnode.h> #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: subr_kobj_vfs.c,v 1.13 2026/01/04 03:19:33 riastradh Exp $"); static void kobj_close_vfs(kobj_t ko) { VOP_UNLOCK(ko->ko_source); vn_close(ko->ko_source, FREAD, kauth_cred_get()); } /* * kobj_read: * * Utility function: read from the object. */ static int kobj_read_vfs(kobj_t ko, void **basep, size_t size, off_t off, bool allocate) { size_t resid; void *base; int error; KASSERT(ko->ko_source != NULL); if (allocate) { base = kmem_alloc(size, KM_SLEEP); } else { base = *basep; #ifdef DIAGNOSTIC bool ok = false; if ((uintptr_t)base >= (uintptr_t)ko->ko_text_address && (uintptr_t)base + size <= (uintptr_t)ko->ko_text_address + ko->ko_text_size) ok = true; if ((uintptr_t)base >= (uintptr_t)ko->ko_data_address && (uintptr_t)base + size <= (uintptr_t)ko->ko_data_address + ko->ko_data_size) ok = true; if ((uintptr_t)base >= (uintptr_t)ko->ko_rodata_address && (uintptr_t)base + size <= (uintptr_t)ko->ko_rodata_address + ko->ko_rodata_size) ok = true; if (!ok) panic("kobj_read_vfs: not in a dedicated segment"); #endif } error = vn_rdwr(UIO_READ, ko->ko_source, base, size, off, UIO_SYSSPACE, IO_NODELOCKED, curlwp->l_cred, &resid, curlwp); if (error == 0 && resid != 0) { error = SET_ERROR(EINVAL); } if (allocate && error != 0) { kmem_free(base, size); base = NULL; } if (allocate) *basep = base; return error; } /* * kobj_load_vfs: * * Load an object located in the file system. */ int kobj_load_vfs(kobj_t *kop, const char *path, const bool nochroot) { struct pathbuf *pb; struct vnode *vp; int error; kobj_t ko; KASSERT(path != NULL); if (strchr(path, '/') == NULL) return SET_ERROR(ENOENT); ko = kmem_zalloc(sizeof(*ko), KM_SLEEP); pb = pathbuf_create(path); if (pb == NULL) { kmem_free(ko, sizeof(*ko)); return SET_ERROR(ENOMEM); } error = vn_open(NULL, pb, (nochroot ? NOCHROOT : 0), FREAD, 0, &vp, NULL, NULL); if (error != 0) { pathbuf_destroy(pb); kmem_free(ko, sizeof(*ko)); return error; } ko->ko_type = KT_VNODE; kobj_setname(ko, path); ko->ko_source = vp; ko->ko_read = kobj_read_vfs; ko->ko_close = kobj_close_vfs; pathbuf_destroy(pb); *kop = ko; return kobj_load(ko); } #else /* MODULAR */ int kobj_load_vfs(kobj_t *kop, const char *path, const bool nochroot) { return SET_ERROR(ENOSYS); } #endif
