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e386b444 | 1 | /** @file\r |
2 | Entry point to a EFI/DXE driver.\r | |
3 | \r | |
9095d37b | 4 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
9344f092 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
e386b444 | 6 | \r |
7 | **/\r | |
8 | \r | |
c7d265a9 | 9 | #include <Uefi.h>\r |
c892d846 | 10 | \r |
c7d265a9 | 11 | #include <Protocol/LoadedImage.h>\r |
c892d846 | 12 | \r |
c7d265a9 | 13 | #include <Library/UefiDriverEntryPoint.h>\r |
6517edbe | 14 | #include <Library/BaseLib.h>\r |
c7d265a9 | 15 | #include <Library/DebugLib.h>\r |
16 | #include <Library/UefiBootServicesTableLib.h>\r | |
e386b444 | 17 | \r |
e386b444 | 18 | /**\r |
7eb2c64d | 19 | Unloads an image from memory.\r |
e386b444 | 20 | \r |
9095d37b | 21 | This function is a callback that a driver registers to do cleanup\r |
7eb2c64d LG |
22 | when the UnloadImage boot service function is called.\r |
23 | \r | |
24 | @param ImageHandle The handle to the image to unload.\r | |
e386b444 | 25 | \r |
373b5cf9 | 26 | @return Status returned by all unload().\r |
e386b444 | 27 | \r |
28 | **/\r | |
e386b444 | 29 | EFI_STATUS\r |
30 | EFIAPI\r | |
31 | _DriverUnloadHandler (\r | |
2f88bd3a | 32 | EFI_HANDLE ImageHandle\r |
e386b444 | 33 | )\r |
34 | {\r | |
35 | EFI_STATUS Status;\r | |
36 | \r | |
37 | //\r | |
38 | // If an UnloadImage() handler is specified, then call it\r | |
39 | //\r | |
40 | Status = ProcessModuleUnloadList (ImageHandle);\r | |
41 | \r | |
42 | //\r | |
43 | // If the driver specific unload handler does not return an error, then call all of the\r | |
44 | // library destructors. If the unload handler returned an error, then the driver can not be\r | |
45 | // unloaded, and the library destructors should not be called\r | |
46 | //\r | |
47 | if (!EFI_ERROR (Status)) {\r | |
e386b444 | 48 | ProcessLibraryDestructorList (ImageHandle, gST);\r |
49 | }\r | |
50 | \r | |
51 | //\r | |
52 | // Return the status from the driver specific unload handler\r | |
53 | //\r | |
54 | return Status;\r | |
55 | }\r | |
56 | \r | |
e386b444 | 57 | /**\r |
9095d37b LG |
58 | The entry point of PE/COFF Image for a DXE Driver, DXE Runtime Driver, DXE SMM\r |
59 | Driver, or UEFI Driver.\r | |
66770ccb | 60 | \r |
61 | This function is the entry point for a DXE Driver, DXE Runtime Driver, DXE SMM Driver,\r | |
62 | or UEFI Driver. This function must call ProcessLibraryConstructorList() and\r | |
63 | ProcessModuleEntryPointList(). If the return status from ProcessModuleEntryPointList()\r | |
9095d37b LG |
64 | is an error status, then ProcessLibraryDestructorList() must be called. The return\r |
65 | value from ProcessModuleEntryPointList() is returned. If _gDriverUnloadImageCount\r | |
66 | is greater than zero, then an unload handler must be registered for this image\r | |
58380e9c | 67 | and the unload handler must invoke ProcessModuleUnloadList().\r |
9095d37b | 68 | If _gUefiDriverRevision is not zero and SystemTable->Hdr.Revision is less than\r |
58380e9c | 69 | _gUefiDriverRevison, then return EFI_INCOMPATIBLE_VERSION.\r |
e386b444 | 70 | \r |
e386b444 | 71 | \r |
9095d37b | 72 | @param ImageHandle The image handle of the DXE Driver, DXE Runtime Driver,\r |
58380e9c | 73 | DXE SMM Driver, or UEFI Driver.\r |
f6d2bcc6 | 74 | @param SystemTable A pointer to the EFI System Table.\r |
66770ccb | 75 | \r |
9095d37b | 76 | @retval EFI_SUCCESS The DXE Driver, DXE Runtime Driver, DXE SMM\r |
58380e9c | 77 | Driver, or UEFI Driver exited normally.\r |
9095d37b | 78 | @retval EFI_INCOMPATIBLE_VERSION _gUefiDriverRevision is greater than\r |
58380e9c | 79 | SystemTable->Hdr.Revision.\r |
66770ccb | 80 | @retval Other Return value from ProcessModuleEntryPointList().\r |
e386b444 | 81 | \r |
82 | **/\r | |
83 | EFI_STATUS\r | |
84 | EFIAPI\r | |
85 | _ModuleEntryPoint (\r | |
86 | IN EFI_HANDLE ImageHandle,\r | |
87 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
88 | )\r | |
89 | {\r | |
90 | EFI_STATUS Status;\r | |
91 | EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;\r | |
92 | \r | |
93 | if (_gUefiDriverRevision != 0) {\r | |
94 | //\r | |
95 | // Make sure that the EFI/UEFI spec revision of the platform is >= EFI/UEFI spec revision of the driver\r | |
96 | //\r | |
97 | if (SystemTable->Hdr.Revision < _gUefiDriverRevision) {\r | |
98 | return EFI_INCOMPATIBLE_VERSION;\r | |
99 | }\r | |
100 | }\r | |
101 | \r | |
c7d265a9 | 102 | //\r |
103 | // Call constructor for all libraries\r | |
104 | //\r | |
105 | ProcessLibraryConstructorList (ImageHandle, SystemTable);\r | |
106 | \r | |
e386b444 | 107 | //\r |
108 | // Install unload handler...\r | |
109 | //\r | |
110 | if (_gDriverUnloadImageCount != 0) {\r | |
111 | Status = gBS->HandleProtocol (\r | |
112 | ImageHandle,\r | |
113 | &gEfiLoadedImageProtocolGuid,\r | |
114 | (VOID **)&LoadedImage\r | |
115 | );\r | |
116 | ASSERT_EFI_ERROR (Status);\r | |
117 | LoadedImage->Unload = _DriverUnloadHandler;\r | |
118 | }\r | |
119 | \r | |
e386b444 | 120 | //\r |
121 | // Call the driver entry point\r | |
122 | //\r | |
123 | Status = ProcessModuleEntryPointList (ImageHandle, SystemTable);\r | |
124 | \r | |
125 | //\r | |
126 | // If all of the drivers returned errors, then invoke all of the library destructors\r | |
127 | //\r | |
128 | if (EFI_ERROR (Status)) {\r | |
129 | ProcessLibraryDestructorList (ImageHandle, SystemTable);\r | |
130 | }\r | |
131 | \r | |
132 | //\r | |
133 | // Return the cummalative return status code from all of the driver entry points\r | |
134 | //\r | |
135 | return Status;\r | |
136 | }\r | |
137 | \r | |
e386b444 | 138 | /**\r |
9095d37b | 139 | Required by the EBC compiler and identical in functionality to _ModuleEntryPoint().\r |
66770ccb | 140 | \r |
58380e9c | 141 | This function is required to call _ModuleEntryPoint() passing in ImageHandle,\r |
142 | and SystemTable.\r | |
e386b444 | 143 | \r |
9095d37b | 144 | @param ImageHandle The image handle of the DXE Driver, DXE Runtime Driver, DXE\r |
58380e9c | 145 | SMM Driver, or UEFI Driver.\r |
f6d2bcc6 | 146 | @param SystemTable A pointer to the EFI System Table.\r |
e386b444 | 147 | \r |
9095d37b | 148 | @retval EFI_SUCCESS The DXE Driver, DXE Runtime Driver, DXE SMM\r |
58380e9c | 149 | Driver, or UEFI Driver exited normally.\r |
9095d37b | 150 | @retval EFI_INCOMPATIBLE_VERSION _gUefiDriverRevision is greater than\r |
58380e9c | 151 | SystemTable->Hdr.Revision.\r |
66770ccb | 152 | @retval Other Return value from ProcessModuleEntryPointList().\r |
e386b444 | 153 | **/\r |
154 | EFI_STATUS\r | |
155 | EFIAPI\r | |
156 | EfiMain (\r | |
157 | IN EFI_HANDLE ImageHandle,\r | |
158 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
159 | )\r | |
160 | {\r | |
161 | return _ModuleEntryPoint (ImageHandle, SystemTable);\r | |
162 | }\r |