diff options
Diffstat (limited to 'src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR0LibGenericRequest.cpp')
| -rw-r--r-- | src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR0LibGenericRequest.cpp | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR0LibGenericRequest.cpp b/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR0LibGenericRequest.cpp new file mode 100644 index 00000000..1e559e8b --- /dev/null +++ b/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR0LibGenericRequest.cpp @@ -0,0 +1,185 @@ +/* $Id: VBoxGuestR0LibGenericRequest.cpp $ */ +/** @file + * VBoxGuestLibR0 - Generic VMMDev request management. + */ + +/* + * Copyright (C) 2006-2019 Oracle Corporation + * + * 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 "VBoxGuestR0LibInternal.h" +#include <iprt/asm.h> +#include <iprt/asm-amd64-x86.h> +#include <iprt/assert.h> +#include <iprt/string.h> +#include <VBox/err.h> + + +DECLR0VBGL(int) VbglGR0Verify(const VMMDevRequestHeader *pReq, size_t cbReq) +{ + size_t cbReqExpected; + + if (RT_UNLIKELY(!pReq || cbReq < sizeof(VMMDevRequestHeader))) + { + dprintf(("VbglGR0Verify: Invalid parameter: pReq = %p, cbReq = %zu\n", pReq, cbReq)); + return VERR_INVALID_PARAMETER; + } + + if (RT_UNLIKELY(pReq->size > cbReq)) + { + dprintf(("VbglGR0Verify: request size %u > buffer size %zu\n", pReq->size, cbReq)); + return VERR_INVALID_PARAMETER; + } + + /* The request size must correspond to the request type. */ + cbReqExpected = vmmdevGetRequestSize(pReq->requestType); + if (RT_UNLIKELY(cbReq < cbReqExpected)) + { + dprintf(("VbglGR0Verify: buffer size %zu < expected size %zu\n", cbReq, cbReqExpected)); + return VERR_INVALID_PARAMETER; + } + + if (cbReqExpected == cbReq) + { + /* + * This is most likely a fixed size request, and in this case the + * request size must be also equal to the expected size. + */ + if (RT_UNLIKELY(pReq->size != cbReqExpected)) + { + dprintf(("VbglGR0Verify: request size %u != expected size %zu\n", pReq->size, cbReqExpected)); + return VERR_INVALID_PARAMETER; + } + + return VINF_SUCCESS; + } + + /* + * This can be a variable size request. Check the request type and limit the size + * to VMMDEV_MAX_VMMDEVREQ_SIZE, which is max size supported by the host. + * + * Note: Keep this list sorted for easier human lookup! + */ + if ( pReq->requestType == VMMDevReq_ChangeMemBalloon + || pReq->requestType == VMMDevReq_GetDisplayChangeRequestMulti +#ifdef VBOX_WITH_64_BITS_GUESTS + || pReq->requestType == VMMDevReq_HGCMCall32 + || pReq->requestType == VMMDevReq_HGCMCall64 +#else + || pReq->requestType == VMMDevReq_HGCMCall +#endif + || pReq->requestType == VMMDevReq_RegisterSharedModule + || pReq->requestType == VMMDevReq_ReportGuestUserState + || pReq->requestType == VMMDevReq_LogString + || pReq->requestType == VMMDevReq_SetPointerShape + || pReq->requestType == VMMDevReq_VideoSetVisibleRegion) + { + if (RT_UNLIKELY(cbReq > VMMDEV_MAX_VMMDEVREQ_SIZE)) + { + dprintf(("VbglGR0Verify: VMMDevReq_LogString: buffer size %zu too big\n", cbReq)); + return VERR_BUFFER_OVERFLOW; /** @todo is this error code ok? */ + } + } + else + { + dprintf(("VbglGR0Verify: request size %u > buffer size %zu\n", pReq->size, cbReq)); + return VERR_IO_BAD_LENGTH; /** @todo is this error code ok? */ + } + + return VINF_SUCCESS; +} + +DECLR0VBGL(int) VbglR0GRAlloc(VMMDevRequestHeader **ppReq, size_t cbReq, VMMDevRequestType enmReqType) +{ + int rc = vbglR0Enter(); + if (RT_SUCCESS(rc)) + { + if ( ppReq + && cbReq >= sizeof(VMMDevRequestHeader) + && cbReq == (uint32_t)cbReq) + { + VMMDevRequestHeader *pReq = (VMMDevRequestHeader *)VbglR0PhysHeapAlloc((uint32_t)cbReq); + AssertMsgReturn(pReq, ("VbglR0GRAlloc: no memory (cbReq=%u)\n", cbReq), VERR_NO_MEMORY); + memset(pReq, 0xAA, cbReq); + + pReq->size = (uint32_t)cbReq; + pReq->version = VMMDEV_REQUEST_HEADER_VERSION; + pReq->requestType = enmReqType; + pReq->rc = VERR_GENERAL_FAILURE; + pReq->reserved1 = 0; +#ifdef VBGL_VBOXGUEST + pReq->fRequestor = VMMDEV_REQUESTOR_KERNEL | VMMDEV_REQUESTOR_USR_DRV +#else + pReq->fRequestor = VMMDEV_REQUESTOR_KERNEL | VMMDEV_REQUESTOR_USR_DRV_OTHER +#endif + + | VMMDEV_REQUESTOR_CON_DONT_KNOW | VMMDEV_REQUESTOR_TRUST_NOT_GIVEN; + *ppReq = pReq; + rc = VINF_SUCCESS; + } + else + { + dprintf(("VbglR0GRAlloc: Invalid parameter: ppReq=%p cbReq=%u\n", ppReq, cbReq)); + rc = VERR_INVALID_PARAMETER; + } + } + return rc; +} + +DECLR0VBGL(int) VbglR0GRPerform(VMMDevRequestHeader *pReq) +{ + int rc = vbglR0Enter(); + if (RT_SUCCESS(rc)) + { + if (pReq) + { + RTCCPHYS PhysAddr = VbglR0PhysHeapGetPhysAddr(pReq); + if ( PhysAddr != 0 + && PhysAddr < _4G) /* Port IO is 32 bit. */ + { + ASMOutU32(g_vbgldata.portVMMDev + VMMDEV_PORT_OFF_REQUEST, (uint32_t)PhysAddr); + /* Make the compiler aware that the host has changed memory. */ + ASMCompilerBarrier(); + rc = pReq->rc; + } + else + rc = VERR_VBGL_INVALID_ADDR; + } + else + rc = VERR_INVALID_PARAMETER; + } + return rc; +} + +DECLR0VBGL(void) VbglR0GRFree(VMMDevRequestHeader *pReq) +{ + int rc = vbglR0Enter(); + if (RT_SUCCESS(rc)) + VbglR0PhysHeapFree(pReq); +} + |