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6d209b23 | 1 | /* $Id: VBoxGuestR0LibGenericRequest.cpp $ */ |
056a1eb7 SF |
2 | /** @file |
3 | * VBoxGuestLibR0 - Generic VMMDev request management. | |
4 | */ | |
5 | ||
6 | /* | |
7 | * Copyright (C) 2006-2016 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 | ||
6d209b23 SF |
27 | |
28 | /********************************************************************************************************************************* | |
29 | * Header Files * | |
30 | *********************************************************************************************************************************/ | |
31 | #include "VBoxGuestR0LibInternal.h" | |
056a1eb7 SF |
32 | #include <iprt/asm.h> |
33 | #include <iprt/asm-amd64-x86.h> | |
34 | #include <iprt/assert.h> | |
35 | #include <iprt/string.h> | |
36 | ||
37 | ||
6d209b23 | 38 | DECLR0VBGL(int) VbglGR0Verify(const VMMDevRequestHeader *pReq, size_t cbReq) |
056a1eb7 SF |
39 | { |
40 | size_t cbReqExpected; | |
41 | ||
42 | if (RT_UNLIKELY(!pReq || cbReq < sizeof(VMMDevRequestHeader))) | |
43 | { | |
6d209b23 | 44 | dprintf(("VbglGR0Verify: Invalid parameter: pReq = %p, cbReq = %zu\n", pReq, cbReq)); |
056a1eb7 SF |
45 | return VERR_INVALID_PARAMETER; |
46 | } | |
47 | ||
48 | if (RT_UNLIKELY(pReq->size > cbReq)) | |
49 | { | |
6d209b23 | 50 | dprintf(("VbglGR0Verify: request size %u > buffer size %zu\n", pReq->size, cbReq)); |
056a1eb7 SF |
51 | return VERR_INVALID_PARAMETER; |
52 | } | |
53 | ||
54 | /* The request size must correspond to the request type. */ | |
55 | cbReqExpected = vmmdevGetRequestSize(pReq->requestType); | |
56 | if (RT_UNLIKELY(cbReq < cbReqExpected)) | |
57 | { | |
6d209b23 | 58 | dprintf(("VbglGR0Verify: buffer size %zu < expected size %zu\n", cbReq, cbReqExpected)); |
056a1eb7 SF |
59 | return VERR_INVALID_PARAMETER; |
60 | } | |
61 | ||
62 | if (cbReqExpected == cbReq) | |
63 | { | |
64 | /* | |
65 | * This is most likely a fixed size request, and in this case the | |
66 | * request size must be also equal to the expected size. | |
67 | */ | |
68 | if (RT_UNLIKELY(pReq->size != cbReqExpected)) | |
69 | { | |
6d209b23 | 70 | dprintf(("VbglGR0Verify: request size %u != expected size %zu\n", pReq->size, cbReqExpected)); |
056a1eb7 SF |
71 | return VERR_INVALID_PARAMETER; |
72 | } | |
73 | ||
74 | return VINF_SUCCESS; | |
75 | } | |
76 | ||
77 | /* | |
78 | * This can be a variable size request. Check the request type and limit the size | |
79 | * to VMMDEV_MAX_VMMDEVREQ_SIZE, which is max size supported by the host. | |
80 | * | |
81 | * Note: Keep this list sorted for easier human lookup! | |
82 | */ | |
83 | if ( pReq->requestType == VMMDevReq_ChangeMemBalloon | |
84 | #ifdef VBOX_WITH_64_BITS_GUESTS | |
85 | || pReq->requestType == VMMDevReq_HGCMCall32 | |
86 | || pReq->requestType == VMMDevReq_HGCMCall64 | |
87 | #else | |
88 | || pReq->requestType == VMMDevReq_HGCMCall | |
89 | #endif | |
90 | || pReq->requestType == VMMDevReq_RegisterSharedModule | |
91 | || pReq->requestType == VMMDevReq_ReportGuestUserState | |
92 | || pReq->requestType == VMMDevReq_LogString | |
93 | || pReq->requestType == VMMDevReq_SetPointerShape | |
94 | || pReq->requestType == VMMDevReq_VideoSetVisibleRegion) | |
95 | { | |
96 | if (RT_UNLIKELY(cbReq > VMMDEV_MAX_VMMDEVREQ_SIZE)) | |
97 | { | |
6d209b23 | 98 | dprintf(("VbglGR0Verify: VMMDevReq_LogString: buffer size %zu too big\n", cbReq)); |
056a1eb7 SF |
99 | return VERR_BUFFER_OVERFLOW; /** @todo is this error code ok? */ |
100 | } | |
101 | } | |
102 | else | |
103 | { | |
6d209b23 | 104 | dprintf(("VbglGR0Verify: request size %u > buffer size %zu\n", pReq->size, cbReq)); |
056a1eb7 SF |
105 | return VERR_IO_BAD_LENGTH; /** @todo is this error code ok? */ |
106 | } | |
107 | ||
108 | return VINF_SUCCESS; | |
109 | } | |
110 | ||
6d209b23 | 111 | DECLR0VBGL(int) VbglR0GRAlloc(VMMDevRequestHeader **ppReq, size_t cbReq, VMMDevRequestType enmReqType) |
056a1eb7 SF |
112 | { |
113 | int rc = vbglR0Enter(); | |
114 | if (RT_SUCCESS(rc)) | |
115 | { | |
116 | if ( ppReq | |
117 | && cbReq >= sizeof(VMMDevRequestHeader) | |
118 | && cbReq == (uint32_t)cbReq) | |
119 | { | |
6d209b23 SF |
120 | VMMDevRequestHeader *pReq = (VMMDevRequestHeader *)VbglR0PhysHeapAlloc((uint32_t)cbReq); |
121 | AssertMsgReturn(pReq, ("VbglR0GRAlloc: no memory (cbReq=%u)\n", cbReq), VERR_NO_MEMORY); | |
056a1eb7 SF |
122 | memset(pReq, 0xAA, cbReq); |
123 | ||
124 | pReq->size = (uint32_t)cbReq; | |
125 | pReq->version = VMMDEV_REQUEST_HEADER_VERSION; | |
126 | pReq->requestType = enmReqType; | |
127 | pReq->rc = VERR_GENERAL_FAILURE; | |
128 | pReq->reserved1 = 0; | |
129 | pReq->reserved2 = 0; | |
130 | ||
131 | *ppReq = pReq; | |
132 | rc = VINF_SUCCESS; | |
133 | } | |
134 | else | |
135 | { | |
6d209b23 | 136 | dprintf(("VbglR0GRAlloc: Invalid parameter: ppReq=%p cbReq=%u\n", ppReq, cbReq)); |
056a1eb7 SF |
137 | rc = VERR_INVALID_PARAMETER; |
138 | } | |
139 | } | |
140 | return rc; | |
141 | } | |
142 | ||
6d209b23 | 143 | DECLR0VBGL(int) VbglR0GRPerform(VMMDevRequestHeader *pReq) |
056a1eb7 SF |
144 | { |
145 | int rc = vbglR0Enter(); | |
146 | if (RT_SUCCESS(rc)) | |
147 | { | |
148 | if (pReq) | |
149 | { | |
6d209b23 | 150 | RTCCPHYS PhysAddr = VbglR0PhysHeapGetPhysAddr(pReq); |
056a1eb7 SF |
151 | if ( PhysAddr != 0 |
152 | && PhysAddr < _4G) /* Port IO is 32 bit. */ | |
153 | { | |
154 | ASMOutU32(g_vbgldata.portVMMDev + VMMDEV_PORT_OFF_REQUEST, (uint32_t)PhysAddr); | |
155 | /* Make the compiler aware that the host has changed memory. */ | |
156 | ASMCompilerBarrier(); | |
157 | rc = pReq->rc; | |
158 | } | |
159 | else | |
160 | rc = VERR_VBGL_INVALID_ADDR; | |
161 | } | |
162 | else | |
163 | rc = VERR_INVALID_PARAMETER; | |
164 | } | |
165 | return rc; | |
166 | } | |
167 | ||
6d209b23 | 168 | DECLR0VBGL(void) VbglR0GRFree(VMMDevRequestHeader *pReq) |
056a1eb7 SF |
169 | { |
170 | int rc = vbglR0Enter(); | |
171 | if (RT_SUCCESS(rc)) | |
6d209b23 | 172 | VbglR0PhysHeapFree(pReq); |
056a1eb7 SF |
173 | } |
174 |