1 /* $NetBSD: rumpuser_mem.c,v 1.2 2014/08/24 14:37:31 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2007-2010 Antti Kantee. All Rights Reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include "rumpuser_port.h" 29 30 #if !defined(lint) 31 __RCSID("$NetBSD: rumpuser_mem.c,v 1.2 2014/08/24 14:37:31 pooka Exp $"); 32 #endif /* !lint */ 33 34 #include <sys/mman.h> 35 36 #include <assert.h> 37 #include <errno.h> 38 #include <stdint.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 42 #include <rump/rumpuser.h> 43 44 #include "rumpuser_int.h" 45 46 int 47 rumpuser_malloc(size_t howmuch, int alignment, void **memp) 48 { 49 void *mem = NULL; 50 int rv; 51 52 if (alignment == 0) 53 alignment = sizeof(void *); 54 55 rv = posix_memalign(&mem, (size_t)alignment, howmuch); 56 if (__predict_false(rv != 0)) { 57 if (rv == EINVAL) { 58 printf("rumpuser_malloc: invalid alignment %d\n", 59 alignment); 60 abort(); 61 } 62 } 63 64 *memp = mem; 65 ET(rv); 66 } 67 68 /*ARGSUSED1*/ 69 void 70 rumpuser_free(void *ptr, size_t size) 71 { 72 73 free(ptr); 74 } 75 76 int 77 rumpuser_anonmmap(void *prefaddr, size_t size, int alignbit, 78 int exec, void **memp) 79 { 80 void *mem; 81 int prot, rv; 82 83 #ifndef MAP_ALIGNED 84 #define MAP_ALIGNED(a) 0 85 if (alignbit) 86 fprintf(stderr, "rumpuser_anonmmap: warning, requested " 87 "alignment not supported by hypervisor\n"); 88 #endif 89 90 prot = PROT_READ|PROT_WRITE; 91 if (exec) 92 prot |= PROT_EXEC; 93 mem = mmap(prefaddr, size, prot, 94 MAP_PRIVATE | MAP_ANON | MAP_ALIGNED(alignbit), -1, 0); 95 if (mem == MAP_FAILED) { 96 rv = errno; 97 } else { 98 *memp = mem; 99 rv = 0; 100 } 101 102 ET(rv); 103 } 104 105 void 106 rumpuser_unmap(void *addr, size_t len) 107 { 108 109 munmap(addr, len); 110 } 111 112