| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame^] | 1 | /** @file
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| 2 | Provides application point extension for "C" style main funciton
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| 3 |
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| 4 | Copyright (c) 2009 - 2013, Intel Corporation. All rights reserved.<BR>
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| 5 | This program and the accompanying materials
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| 6 | are licensed and made available under the terms and conditions of the BSD License
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| 7 | which accompanies this distribution. The full text of the license may be found at
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| 8 | http://opensource.org/licenses/bsd-license.php
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| 9 |
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| 10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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| 11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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| 12 |
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| 13 | **/
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| 14 |
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| 15 | #include <Base.h>
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| 16 |
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| 17 | #include <Protocol/SimpleFileSystem.h>
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| 18 | #include <Protocol/LoadedImage.h>
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| 19 | #include <Protocol/EfiShellInterface.h>
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| 20 | #include <Protocol/EfiShellParameters.h>
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| 21 |
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| 22 | #include <Library/ShellCEntryLib.h>
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| 23 | #include <Library/DebugLib.h>
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| 24 |
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| 25 | /**
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| 26 | UEFI entry point for an application that will in turn call the
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| 27 | ShellAppMain function which has parameters similar to a standard C
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| 28 | main function.
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| 29 |
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| 30 | An application that uses UefiShellCEntryLib must have a ShellAppMain
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| 31 | function as prototyped in Include/Library/ShellCEntryLib.h.
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| 32 |
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| 33 | Note that the Shell uses POSITIVE integers for error values, while UEFI
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| 34 | uses NEGATIVE values. If the application is to be used within a script,
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| 35 | it needs to return one of the SHELL_STATUS values defined in ShellBase.h.
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| 36 |
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| 37 | @param ImageHandle The image handle of the UEFI Application.
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| 38 | @param SystemTable A pointer to the EFI System Table.
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| 39 |
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| 40 | @retval EFI_SUCCESS The application exited normally.
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| 41 | @retval Other An error occurred.
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| 42 |
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| 43 | **/
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| 44 | EFI_STATUS
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| 45 | EFIAPI
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| 46 | ShellCEntryLib (
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| 47 | IN EFI_HANDLE ImageHandle,
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| 48 | IN EFI_SYSTEM_TABLE *SystemTable
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| 49 | )
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| 50 | {
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| 51 | INTN ReturnFromMain;
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| 52 | EFI_SHELL_PARAMETERS_PROTOCOL *EfiShellParametersProtocol;
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| 53 | EFI_SHELL_INTERFACE *EfiShellInterface;
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| 54 | EFI_STATUS Status;
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| 55 |
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| 56 | ReturnFromMain = -1;
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| 57 | EfiShellParametersProtocol = NULL;
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| 58 | EfiShellInterface = NULL;
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| 59 |
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| 60 | Status = SystemTable->BootServices->OpenProtocol(ImageHandle,
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| 61 | &gEfiShellParametersProtocolGuid,
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| 62 | (VOID **)&EfiShellParametersProtocol,
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| 63 | ImageHandle,
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| 64 | NULL,
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| 65 | EFI_OPEN_PROTOCOL_GET_PROTOCOL
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| 66 | );
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| 67 | if (!EFI_ERROR(Status)) {
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| 68 | //
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| 69 | // use shell 2.0 interface
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| 70 | //
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| 71 | ReturnFromMain = ShellAppMain (
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| 72 | EfiShellParametersProtocol->Argc,
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| 73 | EfiShellParametersProtocol->Argv
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| 74 | );
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| 75 | } else {
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| 76 | //
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| 77 | // try to get shell 1.0 interface instead.
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| 78 | //
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| 79 | Status = SystemTable->BootServices->OpenProtocol(ImageHandle,
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| 80 | &gEfiShellInterfaceGuid,
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| 81 | (VOID **)&EfiShellInterface,
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| 82 | ImageHandle,
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| 83 | NULL,
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| 84 | EFI_OPEN_PROTOCOL_GET_PROTOCOL
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| 85 | );
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| 86 | if (!EFI_ERROR(Status)) {
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| 87 | //
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| 88 | // use shell 1.0 interface
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| 89 | //
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| 90 | ReturnFromMain = ShellAppMain (
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| 91 | EfiShellInterface->Argc,
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| 92 | EfiShellInterface->Argv
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| 93 | );
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| 94 | } else {
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| 95 | ASSERT(FALSE);
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| 96 | }
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| 97 | }
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| 98 | return ReturnFromMain;
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| 99 | }
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