1 | /* $Id: SUPWrapperMod-linux.c 87708 2021-02-11 00:09:46Z vboxsync $ */
|
---|
2 | /** @file
|
---|
3 | * Linux .r0 wrapper module template.
|
---|
4 | */
|
---|
5 |
|
---|
6 | /*
|
---|
7 | * Copyright (C) 2006-2021 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 |
|
---|
27 |
|
---|
28 | /*********************************************************************************************************************************
|
---|
29 | * Header Files *
|
---|
30 | *********************************************************************************************************************************/
|
---|
31 | #define IPRT_WITHOUT_EFLAGS_AC_PRESERVING
|
---|
32 | #include "the-linux-kernel.h"
|
---|
33 |
|
---|
34 | #include "version-generated.h"
|
---|
35 | #include "product-generated.h"
|
---|
36 | #include "revision-generated.h"
|
---|
37 |
|
---|
38 | #include <VBox/sup.h>
|
---|
39 |
|
---|
40 |
|
---|
41 | /*********************************************************************************************************************************
|
---|
42 | * Defined Constants And Macros *
|
---|
43 | *********************************************************************************************************************************/
|
---|
44 | /** @def WRAPPED_MODULE_FLAGS
|
---|
45 | * SUPLDRWRAPPEDMODULE_F_XXX or 0. Default: 0 */
|
---|
46 | #ifndef WRAPPED_MODULE_FLAGS
|
---|
47 | # define WRAPPED_MODULE_FLAGS 0
|
---|
48 | #endif
|
---|
49 | /** @def WRAPPED_MODULE_INIT
|
---|
50 | * The module init function or NULL. Default: ModuleInit */
|
---|
51 | #ifndef WRAPPED_MODULE_INIT
|
---|
52 | # define WRAPPED_MODULE_INIT ModuleInit
|
---|
53 | #endif
|
---|
54 | /** @def WRAPPED_MODULE_TERM
|
---|
55 | * The module termination function or NULL. Default: ModuleTerm */
|
---|
56 | #ifndef WRAPPED_MODULE_TERM
|
---|
57 | # define WRAPPED_MODULE_TERM ModuleTerm
|
---|
58 | #endif
|
---|
59 | /** @def WRAPPED_MODULE_SRV_REQ_HANDLER
|
---|
60 | * The service request handler function. Default: NULL */
|
---|
61 | #ifndef WRAPPED_MODULE_SRV_REQ_HANDLER
|
---|
62 | # define WRAPPED_MODULE_SRV_REQ_HANDLER NULL
|
---|
63 | #endif
|
---|
64 | /** @def WRAPPED_MODULE_VMMR0_ENTRY_FAST
|
---|
65 | * The VMMR0 fast entry point. Default: NULL */
|
---|
66 | #ifndef WRAPPED_MODULE_VMMR0_ENTRY_FAST
|
---|
67 | # define WRAPPED_MODULE_VMMR0_ENTRY_FAST NULL
|
---|
68 | #endif
|
---|
69 | /** @def WRAPPED_MODULE_VMMR0_ENTRY_EX
|
---|
70 | * The VMMR0 extended entry point. Default: NULL */
|
---|
71 | #ifndef WRAPPED_MODULE_VMMR0_ENTRY_EX
|
---|
72 | # define WRAPPED_MODULE_VMMR0_ENTRY_EX NULL
|
---|
73 | #endif
|
---|
74 | /** @def WRAPPED_MODULE_SRV_REQ_HANDLER
|
---|
75 | * The service request handler function. Default: NULL */
|
---|
76 | #ifndef WRAPPED_MODULE_SRV_REQ_HANDLER
|
---|
77 | # define WRAPPED_MODULE_SRV_REQ_HANDLER NULL
|
---|
78 | #endif
|
---|
79 |
|
---|
80 | #ifdef DOXYGEN_RUNNING
|
---|
81 | /** @def WRAPPED_MODULE_LINUX_EXPORTS
|
---|
82 | * Define to enabled linux exports. (Needed for VMMR0.r0 only at present.) */
|
---|
83 | # define WRAPPED_MODULE_LINUX_EXPORTS
|
---|
84 | #endif
|
---|
85 | #ifdef DOXYGEN_RUNNING
|
---|
86 | /** @def WRAPPED_MODULE_LICENSE_PROPRIETARY
|
---|
87 | * Define to select proprietary license instead of GPL. */
|
---|
88 | # define WRAPPED_MODULE_LICENSE_PROPRIETARY
|
---|
89 | #endif
|
---|
90 | #ifdef DOXYGEN_RUNNING
|
---|
91 | /** @def WRAPPED_MODULE_SYMBOL_INCLUDE
|
---|
92 | * The include with SYMBOL_ENTRY() invocations for all exported symbols. */
|
---|
93 | # define WRAPPED_MODULE_SYMBOL_INCLUDE "iprt/cdefs.h"
|
---|
94 | #endif
|
---|
95 |
|
---|
96 |
|
---|
97 | /*********************************************************************************************************************************
|
---|
98 | * Internal Functions *
|
---|
99 | *********************************************************************************************************************************/
|
---|
100 | static int __init VBoxWrapperModInit(void);
|
---|
101 | static void __exit VBoxWrapperModUnload(void);
|
---|
102 |
|
---|
103 |
|
---|
104 | /*
|
---|
105 | * Prototype the symbols:
|
---|
106 | */
|
---|
107 | #undef RT_MANGLER
|
---|
108 | #define RT_MANGLER(a_Name) a_Name /* No mangling */
|
---|
109 | #define SYMBOL_ENTRY(a_Name) extern FNRT a_Name;
|
---|
110 | #include WRAPPED_MODULE_SYMBOL_INCLUDE
|
---|
111 | #undef SYMBOL_ENTRY
|
---|
112 |
|
---|
113 | /*
|
---|
114 | * Export the symbols linux style:
|
---|
115 | */
|
---|
116 | #ifdef WRAPPED_MODULE_LINUX_EXPORTS
|
---|
117 | # define SYMBOL_ENTRY(a_Name) EXPORT_SYMBOL(a_Name);
|
---|
118 | # include WRAPPED_MODULE_SYMBOL_INCLUDE
|
---|
119 | # undef SYMBOL_ENTRY
|
---|
120 | #endif
|
---|
121 |
|
---|
122 |
|
---|
123 | /*********************************************************************************************************************************
|
---|
124 | * Global Variables *
|
---|
125 | *********************************************************************************************************************************/
|
---|
126 | extern char vboxr0mod_start[]; /**< start of text in the .r0 module. */
|
---|
127 | extern char vboxr0mod_end[]; /**< end of bss in the .r0 module. */
|
---|
128 |
|
---|
129 | /** The symbol table. */
|
---|
130 | static SUPLDRWRAPMODSYMBOL const g_aSymbols[] =
|
---|
131 | {
|
---|
132 | #define SYMBOL_ENTRY(a_Name) { #a_Name, &a_Name },
|
---|
133 | #include WRAPPED_MODULE_SYMBOL_INCLUDE
|
---|
134 | #undef SYMBOL_ENTRY
|
---|
135 | };
|
---|
136 |
|
---|
137 | /** Wrapped module registration info. */
|
---|
138 | static SUPLDRWRAPPEDMODULE const g_WrappedMod =
|
---|
139 | {
|
---|
140 | /* .uMagic = */ SUPLDRWRAPPEDMODULE_MAGIC,
|
---|
141 | /* .uVersion = */ SUPLDRWRAPPEDMODULE_VERSION,
|
---|
142 | /* .fFlags = */ WRAPPED_MODULE_FLAGS,
|
---|
143 | /* .pvImageStart = */ &vboxr0mod_start[0],
|
---|
144 | /* .pvImageEnd = */ &vboxr0mod_end[0],
|
---|
145 |
|
---|
146 | /* .pfnModuleInit = */ WRAPPED_MODULE_INIT,
|
---|
147 | /* .pfnModuleTerm = */ WRAPPED_MODULE_TERM,
|
---|
148 | /* .pfnVMMR0EntryFast = */ WRAPPED_MODULE_VMMR0_ENTRY_FAST,
|
---|
149 | /* .pfnVMMR0EntryEx = */ WRAPPED_MODULE_VMMR0_ENTRY_EX,
|
---|
150 | /* .pfnSrvReqHandler = */ (PFNSUPR0SERVICEREQHANDLER)WRAPPED_MODULE_SRV_REQ_HANDLER,
|
---|
151 |
|
---|
152 | /* .apSymbols = */ g_aSymbols,
|
---|
153 | /* .cSymbols = */ RT_ELEMENTS(g_aSymbols),
|
---|
154 |
|
---|
155 | /* .szName = */ WRAPPED_MODULE_NAME,
|
---|
156 | /* .uEndMagic = */ SUPLDRWRAPPEDMODULE_MAGIC,
|
---|
157 | };
|
---|
158 |
|
---|
159 | /** The wrapped module handle. */
|
---|
160 | static void *g_hWrappedRegistration = NULL;
|
---|
161 |
|
---|
162 |
|
---|
163 | /**
|
---|
164 | * Initialize module.
|
---|
165 | *
|
---|
166 | * @returns appropriate status code.
|
---|
167 | */
|
---|
168 | static int __init VBoxWrapperModInit(void)
|
---|
169 | {
|
---|
170 | /* Locate the module structure before we call SUPDrv to register.
|
---|
171 |
|
---|
172 | Before Linux v5.9 this could be done by address (__module_address()
|
---|
173 | or __module_text_address()), but someone (guess who) apparently on
|
---|
174 | a mission to make life miserable for out-of-tree modules or something,
|
---|
175 | decided it was only used by build-in code and unexported both of them.
|
---|
176 |
|
---|
177 | I could find no init callouts getting a struct module pointer either,
|
---|
178 | nor any module name hint anywhere I could see. So, we're left with
|
---|
179 | hardcoding the module name via the compiler and call find_module.
|
---|
180 |
|
---|
181 | Sigh^2. */
|
---|
182 | /*printk("vboxwrap/" WRAPPED_MODULE_NAME ": VBoxWrapperModInit\n");*/
|
---|
183 | struct module *pLnxMod = find_module(WRAPPER_MODULE_KMOD_NAME);
|
---|
184 | if (pLnxMod)
|
---|
185 | {
|
---|
186 | int rc = SUPDrvLinuxLdrRegisterWrappedModule(&g_WrappedMod, pLnxMod, &g_hWrappedRegistration);
|
---|
187 | if (rc == 0)
|
---|
188 | return 0;
|
---|
189 | printk("vboxwrap/" WRAPPED_MODULE_NAME ": SUPDrvLinuxRegisterWrappedModule failed: %d\n", rc);
|
---|
190 | }
|
---|
191 | else
|
---|
192 | printk("vboxwrap/" WRAPPED_MODULE_NAME ": find_module(" WRAPPER_MODULE_KMOD_NAME ") failed\n");
|
---|
193 | return -EINVAL;
|
---|
194 | }
|
---|
195 |
|
---|
196 |
|
---|
197 | /**
|
---|
198 | * Unload the module.
|
---|
199 | */
|
---|
200 | static void __exit VBoxWrapperModUnload(void)
|
---|
201 | {
|
---|
202 | /*printk("vboxwrap/" WRAPPED_MODULE_NAME ": VBoxWrapperModUnload\n");*/
|
---|
203 | SUPDrvLinuxLdrDeregisterWrappedModule(&g_WrappedMod, &g_hWrappedRegistration);
|
---|
204 | }
|
---|
205 |
|
---|
206 | module_init(VBoxWrapperModInit);
|
---|
207 | module_exit(VBoxWrapperModUnload);
|
---|
208 |
|
---|
209 | MODULE_AUTHOR(VBOX_VENDOR);
|
---|
210 | MODULE_DESCRIPTION(VBOX_PRODUCT " - " WRAPPED_MODULE_NAME);
|
---|
211 | #ifndef WRAPPED_MODULE_LICENSE_PROPRIETARY
|
---|
212 | MODULE_LICENSE("GPL");
|
---|
213 | #else
|
---|
214 | MODULE_LICENSE("Proprietary");
|
---|
215 | #endif
|
---|
216 | #ifdef MODULE_VERSION
|
---|
217 | MODULE_VERSION(VBOX_VERSION_STRING " r" RT_XSTR(VBOX_SVN_REV));
|
---|
218 | #endif
|
---|
219 |
|
---|