mm.h revision 1.1.2.5
1 1.1.2.1 riastrad /* $NetBSD: mm.h,v 1.1.2.5 2013/09/08 15:38:35 riastradh Exp $ */ 2 1.1.2.1 riastrad 3 1.1.2.1 riastrad /*- 4 1.1.2.1 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.1.2.1 riastrad * All rights reserved. 6 1.1.2.1 riastrad * 7 1.1.2.1 riastrad * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.1 riastrad * by Taylor R. Campbell. 9 1.1.2.1 riastrad * 10 1.1.2.1 riastrad * Redistribution and use in source and binary forms, with or without 11 1.1.2.1 riastrad * modification, are permitted provided that the following conditions 12 1.1.2.1 riastrad * are met: 13 1.1.2.1 riastrad * 1. Redistributions of source code must retain the above copyright 14 1.1.2.1 riastrad * notice, this list of conditions and the following disclaimer. 15 1.1.2.1 riastrad * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.1 riastrad * notice, this list of conditions and the following disclaimer in the 17 1.1.2.1 riastrad * documentation and/or other materials provided with the distribution. 18 1.1.2.1 riastrad * 19 1.1.2.1 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.2.1 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.2.1 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.2.1 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.2.1 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.2.1 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.2.1 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.2.1 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.2.1 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.2.1 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.2.1 riastrad * POSSIBILITY OF SUCH DAMAGE. 30 1.1.2.1 riastrad */ 31 1.1.2.1 riastrad 32 1.1.2.1 riastrad #ifndef _LINUX_MM_H_ 33 1.1.2.1 riastrad #define _LINUX_MM_H_ 34 1.1.2.1 riastrad 35 1.1.2.2 riastrad #include <sys/kauth.h> 36 1.1.2.2 riastrad #include <sys/file.h> 37 1.1.2.2 riastrad #include <sys/mman.h> 38 1.1.2.2 riastrad #include <sys/proc.h> 39 1.1.2.2 riastrad #include <sys/vnode.h> 40 1.1.2.2 riastrad 41 1.1.2.2 riastrad #include <uvm/uvm_extern.h> 42 1.1.2.2 riastrad 43 1.1.2.4 riastrad /* XXX Ugh bletch! Whattakludge! Linux's sense is reversed... */ 44 1.1.2.4 riastrad #undef PAGE_MASK 45 1.1.2.4 riastrad #define PAGE_MASK (~(PAGE_SIZE-1)) 46 1.1.2.4 riastrad 47 1.1.2.5 riastrad #define PAGE_ALIGN(x) (((x) + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1)) 48 1.1.2.5 riastrad #define offset_in_page(x) ((x) & (PAGE_SIZE-1)) 49 1.1.2.5 riastrad 50 1.1.2.2 riastrad /* 51 1.1.2.2 riastrad * ################################################################### 52 1.1.2.2 riastrad * ############### XXX THIS NEEDS SERIOUS SCRUTINY XXX ############### 53 1.1.2.2 riastrad * ################################################################### 54 1.1.2.2 riastrad */ 55 1.1.2.2 riastrad 56 1.1.2.2 riastrad /* 57 1.1.2.2 riastrad * XXX unsigned long is a loser but will probably work accidentally. 58 1.1.2.2 riastrad * XXX struct file might not map quite right between Linux and NetBSD. 59 1.1.2.2 riastrad * XXX This is large enough it should take its own file. 60 1.1.2.2 riastrad */ 61 1.1.2.2 riastrad 62 1.1.2.2 riastrad static inline unsigned long 63 1.1.2.2 riastrad vm_mmap(struct file *file, unsigned long base, unsigned long size, 64 1.1.2.2 riastrad unsigned long prot, unsigned long flags, unsigned long token) 65 1.1.2.2 riastrad { 66 1.1.2.2 riastrad struct vnode *vnode; 67 1.1.2.3 riastrad vaddr_t addr; 68 1.1.2.2 riastrad int error; 69 1.1.2.2 riastrad 70 1.1.2.2 riastrad /* 71 1.1.2.2 riastrad * Cargo-culted from sys_mmap. Various conditions kasserted 72 1.1.2.2 riastrad * rather than checked for expedience and safey. 73 1.1.2.2 riastrad */ 74 1.1.2.2 riastrad 75 1.1.2.2 riastrad KASSERT(base == 0); 76 1.1.2.2 riastrad KASSERT(prot == (PROT_READ | PROT_WRITE)); 77 1.1.2.2 riastrad KASSERT(flags == MAP_SHARED); 78 1.1.2.2 riastrad 79 1.1.2.2 riastrad KASSERT(file->f_type == DTYPE_VNODE); 80 1.1.2.2 riastrad vnode = file->f_data; 81 1.1.2.2 riastrad 82 1.1.2.2 riastrad KASSERT(vnode->v_type == VCHR); 83 1.1.2.2 riastrad KASSERT((file->f_flag & (FREAD | FWRITE)) == (FREAD | FWRITE)); 84 1.1.2.2 riastrad 85 1.1.2.2 riastrad { 86 1.1.2.2 riastrad struct vattr va; 87 1.1.2.2 riastrad 88 1.1.2.2 riastrad vn_lock(vnode, (LK_SHARED | LK_RETRY)); 89 1.1.2.2 riastrad error = VOP_GETATTR(vnode, &va, kauth_cred_get()); 90 1.1.2.2 riastrad VOP_UNLOCK(vnode); 91 1.1.2.2 riastrad if (error) 92 1.1.2.2 riastrad goto out; 93 1.1.2.2 riastrad /* XXX kassert? */ 94 1.1.2.2 riastrad if ((va.va_flags & (SF_SNAPSHOT | IMMUTABLE | APPEND)) != 0) { 95 1.1.2.2 riastrad error = EACCES; 96 1.1.2.2 riastrad goto out; 97 1.1.2.2 riastrad } 98 1.1.2.2 riastrad } 99 1.1.2.2 riastrad 100 1.1.2.2 riastrad /* XXX pax_mprotect? pax_aslr? */ 101 1.1.2.2 riastrad 102 1.1.2.3 riastrad addr = (*curproc->p_emul->e_vm_default_addr)(curproc, 103 1.1.2.3 riastrad (vaddr_t)curproc->p_vmspace->vm_daddr, size); 104 1.1.2.2 riastrad error = uvm_mmap(&curproc->p_vmspace->vm_map, &addr, size, 105 1.1.2.2 riastrad (VM_PROT_READ | VM_PROT_WRITE), (VM_PROT_READ | VM_PROT_WRITE), 106 1.1.2.2 riastrad MAP_SHARED, vnode, base, 107 1.1.2.2 riastrad curproc->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); 108 1.1.2.2 riastrad if (error) 109 1.1.2.2 riastrad goto out; 110 1.1.2.2 riastrad 111 1.1.2.2 riastrad KASSERT(addr <= -1024UL); /* XXX Kludgerosity! */ 112 1.1.2.2 riastrad 113 1.1.2.2 riastrad out: /* XXX errno NetBSD->Linux (kludgerific) */ 114 1.1.2.2 riastrad return (error? (-error) : (unsigned long)addr); 115 1.1.2.2 riastrad } 116 1.1.2.2 riastrad 117 1.1.2.1 riastrad #endif /* _LINUX_MM_H_ */ 118
Indexes created Thu Oct 02 14:10:14 GMT 2025