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/* $Id: alloc-r0drv-freebsd.c $ */
/** @file
* IPRT - Memory Allocation, Ring-0 Driver, FreeBSD.
*/
/*
* Contributed by knut st. osmundsen.
*
* Copyright (C) 2007-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
* --------------------------------------------------------------------
*
* This code is based on:
*
* Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "the-freebsd-kernel.h"
#include "internal/iprt.h"
#include <iprt/mem.h>
#include <iprt/assert.h>
#include <iprt/err.h>
#include <iprt/param.h>
#include "r0drv/alloc-r0drv.h"
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
/* These two statements will define two globals and add initializers
and destructors that will be called at load/unload time (I think). */
MALLOC_DEFINE(M_IPRTHEAP, "iprtheap", "IPRT - heap");
MALLOC_DEFINE(M_IPRTCONT, "iprtcont", "IPRT - contiguous");
DECLHIDDEN(int) rtR0MemAllocEx(size_t cb, uint32_t fFlags, PRTMEMHDR *ppHdr)
{
size_t cbAllocated = cb;
PRTMEMHDR pHdr = NULL;
#ifdef RT_ARCH_AMD64
/*
* Things are a bit more complicated on AMD64 for executable memory
* because we need to be in the ~2GB..~0 range for code.
*/
if (fFlags & RTMEMHDR_FLAG_EXEC)
{
if (fFlags & RTMEMHDR_FLAG_ANY_CTX)
return VERR_NOT_SUPPORTED;
# ifdef USE_KMEM_ALLOC_PROT
pHdr = (PRTMEMHDR)kmem_alloc_prot(kernel_map, cb + sizeof(*pHdr),
VM_PROT_ALL, VM_PROT_ALL, KERNBASE);
# else
vm_object_t pVmObject = NULL;
vm_offset_t Addr = KERNBASE;
cbAllocated = RT_ALIGN_Z(cb + sizeof(*pHdr), PAGE_SIZE);
pVmObject = vm_object_allocate(OBJT_DEFAULT, cbAllocated >> PAGE_SHIFT);
if (!pVmObject)
return VERR_NO_EXEC_MEMORY;
/* Addr contains a start address vm_map_find will start searching for suitable space at. */
#if __FreeBSD_version >= 1000055
int rc = vm_map_find(kernel_map, pVmObject, 0, &Addr,
cbAllocated, 0, VMFS_ANY_SPACE, VM_PROT_ALL, VM_PROT_ALL, 0);
#else
int rc = vm_map_find(kernel_map, pVmObject, 0, &Addr,
cbAllocated, TRUE, VM_PROT_ALL, VM_PROT_ALL, 0);
#endif
if (rc == KERN_SUCCESS)
{
rc = vm_map_wire(kernel_map, Addr, Addr + cbAllocated,
VM_MAP_WIRE_SYSTEM | VM_MAP_WIRE_NOHOLES);
if (rc == KERN_SUCCESS)
{
pHdr = (PRTMEMHDR)Addr;
if (fFlags & RTMEMHDR_FLAG_ZEROED)
bzero(pHdr, cbAllocated);
}
else
vm_map_remove(kernel_map,
Addr,
Addr + cbAllocated);
}
else
vm_object_deallocate(pVmObject);
# endif
}
else
#endif
{
pHdr = (PRTMEMHDR)malloc(cb + sizeof(RTMEMHDR), M_IPRTHEAP,
fFlags & RTMEMHDR_FLAG_ZEROED ? M_NOWAIT | M_ZERO : M_NOWAIT);
}
if (RT_UNLIKELY(!pHdr))
return VERR_NO_MEMORY;
pHdr->u32Magic = RTMEMHDR_MAGIC;
pHdr->fFlags = fFlags;
pHdr->cb = cbAllocated;
pHdr->cbReq = cb;
*ppHdr = pHdr;
return VINF_SUCCESS;
}
DECLHIDDEN(void) rtR0MemFree(PRTMEMHDR pHdr)
{
pHdr->u32Magic += 1;
#ifdef RT_ARCH_AMD64
if (pHdr->fFlags & RTMEMHDR_FLAG_EXEC)
# ifdef USE_KMEM_ALLOC_PROT
kmem_free(kernel_map, (vm_offset_t)pHdr, pHdr->cb);
# else
vm_map_remove(kernel_map, (vm_offset_t)pHdr, ((vm_offset_t)pHdr) + pHdr->cb);
# endif
else
#endif
free(pHdr, M_IPRTHEAP);
}
RTR0DECL(void *) RTMemContAlloc(PRTCCPHYS pPhys, size_t cb)
{
void *pv;
/*
* Validate input.
*/
AssertPtr(pPhys);
Assert(cb > 0);
/*
* This API works in pages, so no need to do any size aligning.
*/
pv = contigmalloc(cb, /* size */
M_IPRTCONT, /* type */
M_NOWAIT | M_ZERO, /* flags */
0, /* lowest physical address*/
_4G-1, /* highest physical address */
PAGE_SIZE, /* alignment. */
0); /* boundary */
if (pv)
{
Assert(!((uintptr_t)pv & PAGE_OFFSET_MASK));
*pPhys = vtophys(pv);
Assert(!(*pPhys & PAGE_OFFSET_MASK));
}
return pv;
}
RTR0DECL(void) RTMemContFree(void *pv, size_t cb)
{
if (pv)
{
AssertMsg(!((uintptr_t)pv & PAGE_OFFSET_MASK), ("pv=%p\n", pv));
contigfree(pv, cb, M_IPRTCONT);
}
}
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