diff options
Diffstat (limited to '')
| -rw-r--r-- | src/VBox/Runtime/r0drv/freebsd/alloc-r0drv-freebsd.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/freebsd/alloc-r0drv-freebsd.c b/src/VBox/Runtime/r0drv/freebsd/alloc-r0drv-freebsd.c new file mode 100644 index 00000000..60294ed3 --- /dev/null +++ b/src/VBox/Runtime/r0drv/freebsd/alloc-r0drv-freebsd.c @@ -0,0 +1,185 @@ +/* $Id: alloc-r0drv-freebsd.c $ */ +/** @file + * IPRT - Memory Allocation, Ring-0 Driver, FreeBSD. + */ + +/* + * 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); + } +} + |