| 1 | /* $Id: alloc-freebsd.cpp 31158 2010-07-28 03:24:30Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT - Memory Allocation, FreeBSD.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2010 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * The contents of this file may alternatively be used under the terms
|
|---|
| 18 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | * VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | *
|
|---|
| 23 | * You may elect to license modified versions of this file under the
|
|---|
| 24 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | */
|
|---|
| 26 |
|
|---|
| 27 |
|
|---|
| 28 | /*******************************************************************************
|
|---|
| 29 | * Header Files *
|
|---|
| 30 | *******************************************************************************/
|
|---|
| 31 | #include <iprt/alloc.h>
|
|---|
| 32 | #include <iprt/assert.h>
|
|---|
| 33 | #include <iprt/param.h>
|
|---|
| 34 | #include <iprt/err.h>
|
|---|
| 35 | #include <iprt/string.h>
|
|---|
| 36 |
|
|---|
| 37 | #include <stdlib.h>
|
|---|
| 38 | #include <errno.h>
|
|---|
| 39 | #include <sys/mman.h>
|
|---|
| 40 |
|
|---|
| 41 |
|
|---|
| 42 | RTDECL(void *) RTMemExecAllocTag(size_t cb, const char *pszTag) RT_NO_THROW
|
|---|
| 43 | {
|
|---|
| 44 | /*
|
|---|
| 45 | * Allocate first.
|
|---|
| 46 | */
|
|---|
| 47 | AssertMsg(cb, ("Allocating ZERO bytes is really not a good idea! Good luck with the next assertion!\n"));
|
|---|
| 48 | cb = RT_ALIGN_Z(cb, PAGE_SIZE);
|
|---|
| 49 | void *pv = RTMemPageAlloc(cb);
|
|---|
| 50 | if (pv)
|
|---|
| 51 | {
|
|---|
| 52 | /*
|
|---|
| 53 | * Add PROT_EXEC flag to the page(s).
|
|---|
| 54 | */
|
|---|
| 55 | memset(pv, 0xcc, cb);
|
|---|
| 56 | int rc = mprotect(pv, cb, PROT_READ | PROT_WRITE | PROT_EXEC);
|
|---|
| 57 | if (rc)
|
|---|
| 58 | {
|
|---|
| 59 | AssertMsgFailed(("mprotect(%p, %#x,,) -> rc=%d, errno=%d\n", pv, cb, rc, errno));
|
|---|
| 60 | free(pv);
|
|---|
| 61 | pv = NULL;
|
|---|
| 62 | }
|
|---|
| 63 | }
|
|---|
| 64 | return pv;
|
|---|
| 65 | }
|
|---|
| 66 |
|
|---|
| 67 |
|
|---|
| 68 | RTDECL(void) RTMemExecFree(void *pv) RT_NO_THROW
|
|---|
| 69 | {
|
|---|
| 70 | if (pv)
|
|---|
| 71 | free(pv);
|
|---|
| 72 | }
|
|---|
| 73 |
|
|---|
| 74 |
|
|---|
| 75 | RTDECL(void *) RTMemPageAllocTag(size_t cb, const char *pszTag) RT_NO_THROW
|
|---|
| 76 | {
|
|---|
| 77 | cb = RT_ALIGN_Z(cb, PAGE_SIZE);
|
|---|
| 78 | void *pv = malloc(cb);
|
|---|
| 79 | AssertReleaseMsgReturn(RT_ALIGN_P(pv, PAGE_SIZE) == pv,
|
|---|
| 80 | ("malloc(%zu) -> %p; expected page aligned!\n", cb, pv),
|
|---|
| 81 | NULL);
|
|---|
| 82 | return pv;
|
|---|
| 83 | }
|
|---|
| 84 |
|
|---|
| 85 |
|
|---|
| 86 | RTDECL(void *) RTMemPageAllocZTag(size_t cb, const char *pszTag) RT_NO_THROW
|
|---|
| 87 | {
|
|---|
| 88 | cb = RT_ALIGN_Z(cb, PAGE_SIZE);
|
|---|
| 89 | void *pv = RTMemPageAlloc(cb);
|
|---|
| 90 | if (pv)
|
|---|
| 91 | bzero(pv, RT_ALIGN_Z(cb, PAGE_SIZE));
|
|---|
| 92 | return pv;
|
|---|
| 93 | }
|
|---|
| 94 |
|
|---|
| 95 |
|
|---|
| 96 | RTDECL(void) RTMemPageFree(void *pv, size_t cb) RT_NO_THROW
|
|---|
| 97 | {
|
|---|
| 98 | if (pv)
|
|---|
| 99 | free(pv);
|
|---|
| 100 | }
|
|---|
| 101 |
|
|---|
| 102 |
|
|---|
| 103 | RTDECL(int) RTMemProtect(void *pv, size_t cb, unsigned fProtect) RT_NO_THROW
|
|---|
| 104 | {
|
|---|
| 105 | /*
|
|---|
| 106 | * Validate input.
|
|---|
| 107 | */
|
|---|
| 108 | if (cb == 0)
|
|---|
| 109 | {
|
|---|
| 110 | AssertMsgFailed(("!cb\n"));
|
|---|
| 111 | return VERR_INVALID_PARAMETER;
|
|---|
| 112 | }
|
|---|
| 113 | if (fProtect & ~(RTMEM_PROT_NONE | RTMEM_PROT_READ | RTMEM_PROT_WRITE | RTMEM_PROT_EXEC))
|
|---|
| 114 | {
|
|---|
| 115 | AssertMsgFailed(("fProtect=%#x\n", fProtect));
|
|---|
| 116 | return VERR_INVALID_PARAMETER;
|
|---|
| 117 | }
|
|---|
| 118 |
|
|---|
| 119 | /*
|
|---|
| 120 | * Convert the flags.
|
|---|
| 121 | */
|
|---|
| 122 | int fProt;
|
|---|
| 123 | #if RTMEM_PROT_NONE == PROT_NONE \
|
|---|
| 124 | && RTMEM_PROT_READ == PROT_READ \
|
|---|
| 125 | && RTMEM_PROT_WRITE == PROT_WRITE \
|
|---|
| 126 | && RTMEM_PROT_EXEC == PROT_EXEC
|
|---|
| 127 | fProt = fProtect;
|
|---|
| 128 | #else
|
|---|
| 129 | Assert(!RTMEM_PROT_NONE);
|
|---|
| 130 | if (!fProtect)
|
|---|
| 131 | fProt = PROT_NONE;
|
|---|
| 132 | else
|
|---|
| 133 | {
|
|---|
| 134 | fProt = 0;
|
|---|
| 135 | if (fProtect & RTMEM_PROT_READ)
|
|---|
| 136 | fProt |= PROT_READ;
|
|---|
| 137 | if (fProtect & RTMEM_PROT_WRITE)
|
|---|
| 138 | fProt |= PROT_WRITE;
|
|---|
| 139 | if (fProtect & RTMEM_PROT_EXEC)
|
|---|
| 140 | fProt |= PROT_EXEC;
|
|---|
| 141 | }
|
|---|
| 142 | #endif
|
|---|
| 143 |
|
|---|
| 144 | /*
|
|---|
| 145 | * Align the request.
|
|---|
| 146 | */
|
|---|
| 147 | cb += (uintptr_t)pv & PAGE_OFFSET_MASK;
|
|---|
| 148 | pv = (void *)((uintptr_t)pv & ~PAGE_OFFSET_MASK);
|
|---|
| 149 |
|
|---|
| 150 | /*
|
|---|
| 151 | * Change the page attributes.
|
|---|
| 152 | */
|
|---|
| 153 | int rc = mprotect(pv, cb, fProt);
|
|---|
| 154 | if (!rc)
|
|---|
| 155 | return rc;
|
|---|
| 156 | return RTErrConvertFromErrno(errno);
|
|---|
| 157 | }
|
|---|
| 158 |
|
|---|
