mm.h revision 1.2.4.2
1 1.2.4.2 rmind /* $NetBSD: mm.h,v 1.2.4.2 2014/05/18 17:46:01 rmind Exp $ */ 2 1.2.4.2 rmind 3 1.2.4.2 rmind /*- 4 1.2.4.2 rmind * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2.4.2 rmind * All rights reserved. 6 1.2.4.2 rmind * 7 1.2.4.2 rmind * This code is derived from software contributed to The NetBSD Foundation 8 1.2.4.2 rmind * by Taylor R. Campbell. 9 1.2.4.2 rmind * 10 1.2.4.2 rmind * Redistribution and use in source and binary forms, with or without 11 1.2.4.2 rmind * modification, are permitted provided that the following conditions 12 1.2.4.2 rmind * are met: 13 1.2.4.2 rmind * 1. Redistributions of source code must retain the above copyright 14 1.2.4.2 rmind * notice, this list of conditions and the following disclaimer. 15 1.2.4.2 rmind * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.4.2 rmind * notice, this list of conditions and the following disclaimer in the 17 1.2.4.2 rmind * documentation and/or other materials provided with the distribution. 18 1.2.4.2 rmind * 19 1.2.4.2 rmind * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2.4.2 rmind * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2.4.2 rmind * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2.4.2 rmind * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2.4.2 rmind * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2.4.2 rmind * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2.4.2 rmind * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2.4.2 rmind * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2.4.2 rmind * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2.4.2 rmind * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2.4.2 rmind * POSSIBILITY OF SUCH DAMAGE. 30 1.2.4.2 rmind */ 31 1.2.4.2 rmind 32 1.2.4.2 rmind #ifndef _LINUX_MM_H_ 33 1.2.4.2 rmind #define _LINUX_MM_H_ 34 1.2.4.2 rmind 35 1.2.4.2 rmind #include <sys/kauth.h> 36 1.2.4.2 rmind #include <sys/file.h> 37 1.2.4.2 rmind #include <sys/mman.h> 38 1.2.4.2 rmind #include <sys/proc.h> 39 1.2.4.2 rmind #include <sys/vnode.h> 40 1.2.4.2 rmind 41 1.2.4.2 rmind #include <uvm/uvm_extern.h> 42 1.2.4.2 rmind 43 1.2.4.2 rmind /* XXX Ugh bletch! Whattakludge! Linux's sense is reversed... */ 44 1.2.4.2 rmind #undef PAGE_MASK 45 1.2.4.2 rmind #define PAGE_MASK (~(PAGE_SIZE-1)) 46 1.2.4.2 rmind 47 1.2.4.2 rmind #define PAGE_ALIGN(x) (((x) + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1)) 48 1.2.4.2 rmind #define offset_in_page(x) ((x) & (PAGE_SIZE-1)) 49 1.2.4.2 rmind 50 1.2.4.2 rmind /* 51 1.2.4.2 rmind * ################################################################### 52 1.2.4.2 rmind * ############### XXX THIS NEEDS SERIOUS SCRUTINY XXX ############### 53 1.2.4.2 rmind * ################################################################### 54 1.2.4.2 rmind */ 55 1.2.4.2 rmind 56 1.2.4.2 rmind /* 57 1.2.4.2 rmind * XXX unsigned long is a loser but will probably work accidentally. 58 1.2.4.2 rmind * XXX struct file might not map quite right between Linux and NetBSD. 59 1.2.4.2 rmind * XXX This is large enough it should take its own file. 60 1.2.4.2 rmind */ 61 1.2.4.2 rmind 62 1.2.4.2 rmind static inline unsigned long 63 1.2.4.2 rmind vm_mmap(struct file *file, unsigned long base, unsigned long size, 64 1.2.4.2 rmind unsigned long prot, unsigned long flags, unsigned long token) 65 1.2.4.2 rmind { 66 1.2.4.2 rmind struct vnode *vnode; 67 1.2.4.2 rmind vaddr_t addr; 68 1.2.4.2 rmind int error; 69 1.2.4.2 rmind 70 1.2.4.2 rmind /* 71 1.2.4.2 rmind * Cargo-culted from sys_mmap. Various conditions kasserted 72 1.2.4.2 rmind * rather than checked for expedience and safey. 73 1.2.4.2 rmind */ 74 1.2.4.2 rmind 75 1.2.4.2 rmind KASSERT(base == 0); 76 1.2.4.2 rmind KASSERT(prot == (PROT_READ | PROT_WRITE)); 77 1.2.4.2 rmind KASSERT(flags == MAP_SHARED); 78 1.2.4.2 rmind 79 1.2.4.2 rmind KASSERT(file->f_type == DTYPE_VNODE); 80 1.2.4.2 rmind vnode = file->f_data; 81 1.2.4.2 rmind 82 1.2.4.2 rmind KASSERT(vnode->v_type == VCHR); 83 1.2.4.2 rmind KASSERT((file->f_flag & (FREAD | FWRITE)) == (FREAD | FWRITE)); 84 1.2.4.2 rmind 85 1.2.4.2 rmind { 86 1.2.4.2 rmind struct vattr va; 87 1.2.4.2 rmind 88 1.2.4.2 rmind vn_lock(vnode, (LK_SHARED | LK_RETRY)); 89 1.2.4.2 rmind error = VOP_GETATTR(vnode, &va, kauth_cred_get()); 90 1.2.4.2 rmind VOP_UNLOCK(vnode); 91 1.2.4.2 rmind if (error) 92 1.2.4.2 rmind goto out; 93 1.2.4.2 rmind /* XXX kassert? */ 94 1.2.4.2 rmind if ((va.va_flags & (SF_SNAPSHOT | IMMUTABLE | APPEND)) != 0) { 95 1.2.4.2 rmind error = EACCES; 96 1.2.4.2 rmind goto out; 97 1.2.4.2 rmind } 98 1.2.4.2 rmind } 99 1.2.4.2 rmind 100 1.2.4.2 rmind /* XXX pax_mprotect? pax_aslr? */ 101 1.2.4.2 rmind 102 1.2.4.2 rmind addr = (*curproc->p_emul->e_vm_default_addr)(curproc, 103 1.2.4.2 rmind (vaddr_t)curproc->p_vmspace->vm_daddr, size); 104 1.2.4.2 rmind error = uvm_mmap(&curproc->p_vmspace->vm_map, &addr, size, 105 1.2.4.2 rmind (VM_PROT_READ | VM_PROT_WRITE), (VM_PROT_READ | VM_PROT_WRITE), 106 1.2.4.2 rmind MAP_SHARED, vnode, base, 107 1.2.4.2 rmind curproc->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); 108 1.2.4.2 rmind if (error) 109 1.2.4.2 rmind goto out; 110 1.2.4.2 rmind 111 1.2.4.2 rmind KASSERT(addr <= -1024UL); /* XXX Kludgerosity! */ 112 1.2.4.2 rmind 113 1.2.4.2 rmind out: /* XXX errno NetBSD->Linux (kludgerific) */ 114 1.2.4.2 rmind return (error? (-error) : (unsigned long)addr); 115 1.2.4.2 rmind } 116 1.2.4.2 rmind 117 1.2.4.2 rmind #endif /* _LINUX_MM_H_ */ 118
Indexes created Thu Oct 02 14:10:14 GMT 2025