/** @file * IPRT - Memory Objects (Ring-0). */ /* * Copyright (C) 2006-2017 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. */ #ifndef ___iprt_memobj_h #define ___iprt_memobj_h #include #include RT_C_DECLS_BEGIN /** @defgroup grp_rt_memobj RTMemObj - Memory Object Manipulation (Ring-0) * @ingroup grp_rt * @{ */ /** @def RTMEM_TAG * The default allocation tag used by the RTMem allocation APIs. * * When not defined before the inclusion of iprt/memobj.h or iprt/mem.h, this * will default to the pointer to the current file name. The memory API will * make of use of this as pointer to a volatile but read-only string. */ #ifndef RTMEM_TAG # define RTMEM_TAG (__FILE__) #endif #ifdef IN_RING0 /** * Checks if this is mapping or not. * * @returns true if it's a mapping, otherwise false. * @param MemObj The ring-0 memory object handle. */ RTR0DECL(bool) RTR0MemObjIsMapping(RTR0MEMOBJ MemObj); /** * Gets the address of a ring-0 memory object. * * @returns The address of the memory object. * @returns NULL if the handle is invalid (asserts in strict builds) or if there isn't any mapping. * @param MemObj The ring-0 memory object handle. */ RTR0DECL(void *) RTR0MemObjAddress(RTR0MEMOBJ MemObj); /** * Gets the ring-3 address of a ring-0 memory object. * * This only applies to ring-0 memory object with ring-3 mappings of some kind, i.e. * locked user memory, reserved user address space and user mappings. This API should * not be used on any other objects. * * @returns The address of the memory object. * @returns NIL_RTR3PTR if the handle is invalid or if it's not an object with a ring-3 mapping. * Strict builds will assert in both cases. * @param MemObj The ring-0 memory object handle. */ RTR0DECL(RTR3PTR) RTR0MemObjAddressR3(RTR0MEMOBJ MemObj); /** * Gets the size of a ring-0 memory object. * * The returned value may differ from the one specified to the API creating the * object because of alignment adjustments. The minimal alignment currently * employed by any API is PAGE_SIZE, so the result can safely be shifted by * PAGE_SHIFT to calculate a page count. * * @returns The object size. * @returns 0 if the handle is invalid (asserts in strict builds) or if there isn't any mapping. * @param MemObj The ring-0 memory object handle. */ RTR0DECL(size_t) RTR0MemObjSize(RTR0MEMOBJ MemObj); /** * Get the physical address of an page in the memory object. * * @returns The physical address. * @returns NIL_RTHCPHYS if the object doesn't contain fixed physical pages. * @returns NIL_RTHCPHYS if the iPage is out of range. * @returns NIL_RTHCPHYS if the object handle isn't valid. * @param MemObj The ring-0 memory object handle. * @param iPage The page number within the object. */ RTR0DECL(RTHCPHYS) RTR0MemObjGetPagePhysAddr(RTR0MEMOBJ MemObj, size_t iPage); /** * Frees a ring-0 memory object. * * @returns IPRT status code. * @retval VERR_INVALID_HANDLE if * @param MemObj The ring-0 memory object to be freed. NULL is accepted. * @param fFreeMappings Whether or not to free mappings of the object. */ RTR0DECL(int) RTR0MemObjFree(RTR0MEMOBJ MemObj, bool fFreeMappings); /** * Allocates page aligned virtual kernel memory (default tag). * * The memory is taken from a non paged (= fixed physical memory backing) pool. * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param cb Number of bytes to allocate. This is rounded up to nearest page. * @param fExecutable Flag indicating whether it should be permitted to executed code in the memory object. */ #define RTR0MemObjAllocPage(pMemObj, cb, fExecutable) \ RTR0MemObjAllocPageTag((pMemObj), (cb), (fExecutable), RTMEM_TAG) /** * Allocates page aligned virtual kernel memory (custom tag). * * The memory is taken from a non paged (= fixed physical memory backing) pool. * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param cb Number of bytes to allocate. This is rounded up to nearest page. * @param fExecutable Flag indicating whether it should be permitted to executed code in the memory object. * @param pszTag Allocation tag used for statistics and such. */ RTR0DECL(int) RTR0MemObjAllocPageTag(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable, const char *pszTag); /** * Allocates page aligned virtual kernel memory with physical backing below 4GB * (default tag). * * The physical memory backing the allocation is fixed. * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param cb Number of bytes to allocate. This is rounded up to nearest page. * @param fExecutable Flag indicating whether it should be permitted to executed code in the memory object. */ #define RTR0MemObjAllocLow(pMemObj, cb, fExecutable) \ RTR0MemObjAllocLowTag((pMemObj), (cb), (fExecutable), RTMEM_TAG) /** * Allocates page aligned virtual kernel memory with physical backing below 4GB * (custom tag). * * The physical memory backing the allocation is fixed. * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param cb Number of bytes to allocate. This is rounded up to nearest page. * @param fExecutable Flag indicating whether it should be permitted to executed code in the memory object. * @param pszTag Allocation tag used for statistics and such. */ RTR0DECL(int) RTR0MemObjAllocLowTag(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable, const char *pszTag); /** * Allocates page aligned virtual kernel memory with contiguous physical backing * below 4GB (default tag). * * The physical memory backing the allocation is fixed. * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param cb Number of bytes to allocate. This is rounded up to nearest page. * @param fExecutable Flag indicating whether it should be permitted to executed code in the memory object. */ #define RTR0MemObjAllocCont(pMemObj, cb, fExecutable) \ RTR0MemObjAllocContTag((pMemObj), (cb), (fExecutable), RTMEM_TAG) /** * Allocates page aligned virtual kernel memory with contiguous physical backing * below 4GB (custom tag). * * The physical memory backing the allocation is fixed. * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param cb Number of bytes to allocate. This is rounded up to nearest page. * @param fExecutable Flag indicating whether it should be permitted to executed code in the memory object. * @param pszTag Allocation tag used for statistics and such. */ RTR0DECL(int) RTR0MemObjAllocContTag(PRTR0MEMOBJ pMemObj, size_t cb, bool fExecutable, const char *pszTag); /** * Locks a range of user virtual memory (default tag). * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param R3Ptr User virtual address. This is rounded down to a page * boundary. * @param cb Number of bytes to lock. This is rounded up to * nearest page boundary. * @param fAccess The desired access, a combination of RTMEM_PROT_READ * and RTMEM_PROT_WRITE. * @param R0Process The process to lock pages in. NIL_R0PROCESS is an * alias for the current one. * * @remarks RTR0MemGetAddressR3() and RTR0MemGetAddress() will return therounded * down address. * * @remarks Linux: This API requires that the memory begin locked is in a memory * mapping that is not required in any forked off child process. This * is not intented as permanent restriction, feel free to help out * lifting it. */ #define RTR0MemObjLockUser(pMemObj, R3Ptr, cb, fAccess, R0Process) \ RTR0MemObjLockUserTag((pMemObj), (R3Ptr), (cb), (fAccess), (R0Process), RTMEM_TAG) /** * Locks a range of user virtual memory (custom tag). * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param R3Ptr User virtual address. This is rounded down to a page * boundary. * @param cb Number of bytes to lock. This is rounded up to * nearest page boundary. * @param fAccess The desired access, a combination of RTMEM_PROT_READ * and RTMEM_PROT_WRITE. * @param R0Process The process to lock pages in. NIL_R0PROCESS is an * alias for the current one. * @param pszTag Allocation tag used for statistics and such. * * @remarks RTR0MemGetAddressR3() and RTR0MemGetAddress() will return therounded * down address. * * @remarks Linux: This API requires that the memory begin locked is in a memory * mapping that is not required in any forked off child process. This * is not intented as permanent restriction, feel free to help out * lifting it. */ RTR0DECL(int) RTR0MemObjLockUserTag(PRTR0MEMOBJ pMemObj, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process, const char *pszTag); /** * Locks a range of kernel virtual memory (default tag). * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param pv Kernel virtual address. This is rounded down to a page boundary. * @param cb Number of bytes to lock. This is rounded up to nearest page boundary. * @param fAccess The desired access, a combination of RTMEM_PROT_READ * and RTMEM_PROT_WRITE. * * @remark RTR0MemGetAddress() will return the rounded down address. */ #define RTR0MemObjLockKernel(pMemObj, pv, cb, fAccess) \ RTR0MemObjLockKernelTag((pMemObj), (pv), (cb), (fAccess), RTMEM_TAG) /** * Locks a range of kernel virtual memory (custom tag). * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param pv Kernel virtual address. This is rounded down to a page boundary. * @param cb Number of bytes to lock. This is rounded up to nearest page boundary. * @param fAccess The desired access, a combination of RTMEM_PROT_READ * and RTMEM_PROT_WRITE. * @param pszTag Allocation tag used for statistics and such. * * @remark RTR0MemGetAddress() will return the rounded down address. */ RTR0DECL(int) RTR0MemObjLockKernelTag(PRTR0MEMOBJ pMemObj, void *pv, size_t cb, uint32_t fAccess, const char *pszTag); /** * Allocates contiguous page aligned physical memory without (necessarily) any * kernel mapping (default tag). * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param cb Number of bytes to allocate. This is rounded up to nearest page. * @param PhysHighest The highest permitable address (inclusive). * Pass NIL_RTHCPHYS if any address is acceptable. */ #define RTR0MemObjAllocPhys(pMemObj, cb, PhysHighest) \ RTR0MemObjAllocPhysTag((pMemObj), (cb), (PhysHighest), RTMEM_TAG) /** * Allocates contiguous page aligned physical memory without (necessarily) any * kernel mapping (custom tag). * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param cb Number of bytes to allocate. This is rounded up to nearest page. * @param PhysHighest The highest permitable address (inclusive). * Pass NIL_RTHCPHYS if any address is acceptable. * @param pszTag Allocation tag used for statistics and such. */ RTR0DECL(int) RTR0MemObjAllocPhysTag(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest, const char *pszTag); /** * Allocates contiguous physical memory without (necessarily) any kernel mapping * (default tag). * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param cb Number of bytes to allocate. This is rounded up to nearest page. * @param PhysHighest The highest permitable address (inclusive). * Pass NIL_RTHCPHYS if any address is acceptable. * @param uAlignment The alignment of the reserved memory. * Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M, _4M and _1G. */ #define RTR0MemObjAllocPhysEx(pMemObj, cb, PhysHighest, uAlignment) \ RTR0MemObjAllocPhysExTag((pMemObj), (cb), (PhysHighest), (uAlignment), RTMEM_TAG) /** * Allocates contiguous physical memory without (necessarily) any kernel mapping * (custom tag). * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param cb Number of bytes to allocate. This is rounded up to nearest page. * @param PhysHighest The highest permitable address (inclusive). * Pass NIL_RTHCPHYS if any address is acceptable. * @param uAlignment The alignment of the reserved memory. * Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M, _4M and _1G. * @param pszTag Allocation tag used for statistics and such. */ RTR0DECL(int) RTR0MemObjAllocPhysExTag(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment, const char *pszTag); /** * Allocates non-contiguous page aligned physical memory without (necessarily) * any kernel mapping (default tag). * * This API is for allocating huge amounts of pages and will return * VERR_NOT_SUPPORTED if this cannot be implemented in a satisfactory * manner. * * @returns IPRT status code. * @retval VERR_NOT_SUPPORTED if it's not possible to allocated unmapped * physical memory on this platform. The caller should expect * this error and have a fallback strategy for it. * * @param pMemObj Where to store the ring-0 memory object handle. * @param cb Number of bytes to allocate. This is rounded up to nearest page. * @param PhysHighest The highest permitable address (inclusive). * Pass NIL_RTHCPHYS if any address is acceptable. */ #define RTR0MemObjAllocPhysNC(pMemObj, cb, PhysHighest) \ RTR0MemObjAllocPhysNCTag((pMemObj), (cb), (PhysHighest), RTMEM_TAG) /** * Allocates non-contiguous page aligned physical memory without (necessarily) * any kernel mapping (custom tag). * * This API is for allocating huge amounts of pages and will return * VERR_NOT_SUPPORTED if this cannot be implemented in a satisfactory * manner. * * @returns IPRT status code. * @retval VERR_NOT_SUPPORTED if it's not possible to allocated unmapped * physical memory on this platform. The caller should expect * this error and have a fallback strategy for it. * * @param pMemObj Where to store the ring-0 memory object handle. * @param cb Number of bytes to allocate. This is rounded up to nearest page. * @param PhysHighest The highest permitable address (inclusive). * Pass NIL_RTHCPHYS if any address is acceptable. * @param pszTag Allocation tag used for statistics and such. */ RTR0DECL(int) RTR0MemObjAllocPhysNCTag(PRTR0MEMOBJ pMemObj, size_t cb, RTHCPHYS PhysHighest, const char *pszTag); /** Memory cache policy for RTR0MemObjEnterPhys. * @{ */ /** Default caching policy -- don't care. */ #define RTMEM_CACHE_POLICY_DONT_CARE UINT32_C(0) /** MMIO caching policy -- uncachable. */ #define RTMEM_CACHE_POLICY_MMIO UINT32_C(1) /** @} */ /** * Creates a page aligned, contiguous, physical memory object (default tag). * * No physical memory is allocated, we trust you do know what you're doing. * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param Phys The physical address to start at. This is rounded down to the * nearest page boundary. * @param cb The size of the object in bytes. This is rounded up to nearest page boundary. * @param uCachePolicy One of the RTMEM_CACHE_XXX modes. */ #define RTR0MemObjEnterPhys(pMemObj, Phys, cb, uCachePolicy) \ RTR0MemObjEnterPhysTag((pMemObj), (Phys), (cb), (uCachePolicy), RTMEM_TAG) /** * Creates a page aligned, contiguous, physical memory object (custom tag). * * No physical memory is allocated, we trust you do know what you're doing. * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param Phys The physical address to start at. This is rounded down to the * nearest page boundary. * @param cb The size of the object in bytes. This is rounded up to nearest page boundary. * @param uCachePolicy One of the RTMEM_CACHE_XXX modes. * @param pszTag Allocation tag used for statistics and such. */ RTR0DECL(int) RTR0MemObjEnterPhysTag(PRTR0MEMOBJ pMemObj, RTHCPHYS Phys, size_t cb, uint32_t uCachePolicy, const char *pszTag); /** * Reserves kernel virtual address space (default tag). * * If this function fails with VERR_NOT_SUPPORTED, the idea is that you * can use RTR0MemObjEnterPhys() + RTR0MemObjMapKernel() as a fallback if * you have a safe physical address range to make use of... * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param pvFixed Requested address. (void *)-1 means any address. This must match the alignment. * @param cb The number of bytes to reserve. This is rounded up to nearest page. * @param uAlignment The alignment of the reserved memory. * Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M. */ #define RTR0MemObjReserveKernel(pMemObj, pvFixed, cb, uAlignment) \ RTR0MemObjReserveKernelTag((pMemObj), (pvFixed), (cb), (uAlignment), RTMEM_TAG) /** * Reserves kernel virtual address space (custom tag). * * If this function fails with VERR_NOT_SUPPORTED, the idea is that you * can use RTR0MemObjEnterPhys() + RTR0MemObjMapKernel() as a fallback if * you have a safe physical address range to make use of... * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param pvFixed Requested address. (void *)-1 means any address. This must match the alignment. * @param cb The number of bytes to reserve. This is rounded up to nearest page. * @param uAlignment The alignment of the reserved memory. * Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M. * @param pszTag Allocation tag used for statistics and such. */ RTR0DECL(int) RTR0MemObjReserveKernelTag(PRTR0MEMOBJ pMemObj, void *pvFixed, size_t cb, size_t uAlignment, const char *pszTag); /** * Reserves user virtual address space in the current process (default tag). * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param R3PtrFixed Requested address. (RTR3PTR)-1 means any address. This must match the alignment. * @param cb The number of bytes to reserve. This is rounded up to nearest PAGE_SIZE. * @param uAlignment The alignment of the reserved memory. * Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M. * @param R0Process The process to reserve the memory in. NIL_R0PROCESS is an alias for the current one. */ #define RTR0MemObjReserveUser(pMemObj, R3PtrFixed, cb, uAlignment, R0Process) \ RTR0MemObjReserveUserTag((pMemObj), (R3PtrFixed), (cb), (uAlignment), (R0Process), RTMEM_TAG) /** * Reserves user virtual address space in the current process (custom tag). * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle. * @param R3PtrFixed Requested address. (RTR3PTR)-1 means any address. This must match the alignment. * @param cb The number of bytes to reserve. This is rounded up to nearest PAGE_SIZE. * @param uAlignment The alignment of the reserved memory. * Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M. * @param R0Process The process to reserve the memory in. NIL_R0PROCESS is an alias for the current one. * @param pszTag Allocation tag used for statistics and such. */ RTR0DECL(int) RTR0MemObjReserveUserTag(PRTR0MEMOBJ pMemObj, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process, const char *pszTag); /** * Maps a memory object into kernel virtual address space (default tag). * * This is the same as calling RTR0MemObjMapKernelEx with cbSub and offSub set * to zero. * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle of the mapping object. * @param MemObjToMap The object to be map. * @param pvFixed Requested address. (void *)-1 means any address. This must match the alignment. * @param uAlignment The alignment of the reserved memory. * Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M. * @param fProt Combination of RTMEM_PROT_* flags (except RTMEM_PROT_NONE). */ #define RTR0MemObjMapKernel(pMemObj, MemObjToMap, pvFixed, uAlignment, fProt) \ RTR0MemObjMapKernelTag((pMemObj), (MemObjToMap), (pvFixed), (uAlignment), (fProt), RTMEM_TAG) /** * Maps a memory object into kernel virtual address space (custom tag). * * This is the same as calling RTR0MemObjMapKernelEx with cbSub and offSub set * to zero. * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle of the mapping object. * @param MemObjToMap The object to be map. * @param pvFixed Requested address. (void *)-1 means any address. This must match the alignment. * @param uAlignment The alignment of the reserved memory. * Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M. * @param fProt Combination of RTMEM_PROT_* flags (except RTMEM_PROT_NONE). * @param pszTag Allocation tag used for statistics and such. */ RTR0DECL(int) RTR0MemObjMapKernelTag(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, void *pvFixed, size_t uAlignment, unsigned fProt, const char *pszTag); /** * Maps a memory object into kernel virtual address space (default tag). * * The ability to map subsections of the object into kernel space is currently * not implemented on all platforms. All/Most of platforms supports mapping the * whole object into kernel space. * * @returns IPRT status code. * @retval VERR_NOT_SUPPORTED if it's not possible to map a subsection of a * memory object on this platform. When you hit this, try implement it. * * @param pMemObj Where to store the ring-0 memory object handle of the mapping object. * @param MemObjToMap The object to be map. * @param pvFixed Requested address. (void *)-1 means any address. This must match the alignment. * @param uAlignment The alignment of the reserved memory. * Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M. * @param fProt Combination of RTMEM_PROT_* flags (except RTMEM_PROT_NONE). * @param offSub Where in the object to start mapping. If non-zero * the value must be page aligned and cbSub must be * non-zero as well. * @param cbSub The size of the part of the object to be mapped. If * zero the entire object is mapped. The value must be * page aligned. */ #define RTR0MemObjMapKernelEx(pMemObj, MemObjToMap, pvFixed, uAlignment, fProt, offSub, cbSub) \ RTR0MemObjMapKernelExTag((pMemObj), (MemObjToMap), (pvFixed), (uAlignment), (fProt), (offSub), (cbSub), RTMEM_TAG) /** * Maps a memory object into kernel virtual address space (custom tag). * * The ability to map subsections of the object into kernel space is currently * not implemented on all platforms. All/Most of platforms supports mapping the * whole object into kernel space. * * @returns IPRT status code. * @retval VERR_NOT_SUPPORTED if it's not possible to map a subsection of a * memory object on this platform. When you hit this, try implement it. * * @param pMemObj Where to store the ring-0 memory object handle of the mapping object. * @param MemObjToMap The object to be map. * @param pvFixed Requested address. (void *)-1 means any address. This must match the alignment. * @param uAlignment The alignment of the reserved memory. * Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M. * @param fProt Combination of RTMEM_PROT_* flags (except RTMEM_PROT_NONE). * @param offSub Where in the object to start mapping. If non-zero * the value must be page aligned and cbSub must be * non-zero as well. * @param cbSub The size of the part of the object to be mapped. If * zero the entire object is mapped. The value must be * page aligned. * @param pszTag Allocation tag used for statistics and such. */ RTR0DECL(int) RTR0MemObjMapKernelExTag(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, void *pvFixed, size_t uAlignment, unsigned fProt, size_t offSub, size_t cbSub, const char *pszTag); /** * Maps a memory object into user virtual address space in the current process * (default tag). * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle of the mapping object. * @param MemObjToMap The object to be map. * @param R3PtrFixed Requested address. (RTR3PTR)-1 means any address. This must match the alignment. * @param uAlignment The alignment of the reserved memory. * Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M. * @param fProt Combination of RTMEM_PROT_* flags (except RTMEM_PROT_NONE). * @param R0Process The process to map the memory into. NIL_R0PROCESS is an alias for the current one. */ #define RTR0MemObjMapUser(pMemObj, MemObjToMap, R3PtrFixed, uAlignment, fProt, R0Process) \ RTR0MemObjMapUserTag((pMemObj), (MemObjToMap), (R3PtrFixed), (uAlignment), (fProt), (R0Process), RTMEM_TAG) /** * Maps a memory object into user virtual address space in the current process * (custom tag). * * @returns IPRT status code. * @param pMemObj Where to store the ring-0 memory object handle of the mapping object. * @param MemObjToMap The object to be map. * @param R3PtrFixed Requested address. (RTR3PTR)-1 means any address. This must match the alignment. * @param uAlignment The alignment of the reserved memory. * Supported values are 0 (alias for PAGE_SIZE), PAGE_SIZE, _2M and _4M. * @param fProt Combination of RTMEM_PROT_* flags (except RTMEM_PROT_NONE). * @param R0Process The process to map the memory into. NIL_R0PROCESS is an alias for the current one. * @param pszTag Allocation tag used for statistics and such. */ RTR0DECL(int) RTR0MemObjMapUserTag(PRTR0MEMOBJ pMemObj, RTR0MEMOBJ MemObjToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process, const char *pszTag); /** * Change the page level protection of one or more pages in a memory object. * * @returns IPRT status code. * @retval VERR_NOT_SUPPORTED if the OS doesn't provide any way to manipulate * page level protection. The caller must handle this status code * gracefully. (Note that it may also occur if the implementation is * missing, in which case just go ahead and implement it.) * * @param hMemObj Memory object handle. * @param offSub Offset into the memory object. Must be page aligned. * @param cbSub Number of bytes to change the protection of. Must be * page aligned. * @param fProt Combination of RTMEM_PROT_* flags. */ RTR0DECL(int) RTR0MemObjProtect(RTR0MEMOBJ hMemObj, size_t offSub, size_t cbSub, uint32_t fProt); #endif /* IN_RING0 */ /** @} */ RT_C_DECLS_END #endif