Build UEFI Application --- ShellCEntryLib.h + ShellAppMain (EFI Library build)

建立UEFI的Application步驟，可參考如下。

將C:\EDK2\MdeModulePkg\Application中HelloWorld整個folder複製到C:\EDK2\MyPkg\Application中改名Hello，接下來修改一些地方

 1.1 MyPkg\Application\Hello\Hello.inf

=============================================================

[Defines]

  #為避免衝突而改

  INF_VERSION         = 0x00010006

  #產生文件名字為 Hello.efi

  BASE_NAME             = hello

  #(避免 GUID 與其他文件衝突，至 Create GUIDs online 產生新的一組GUID，或開啟VS2010 -> Tools -> Create GUID 來產生GUID)

  FILE_GUID            = ab0f9969-0a54-4695-ace7-42fe6bb84a1d  

  #模型種類：UEFI_DRIVER, DXE_DRIVER, DXE_RUNTIME_DRIVER, UEFI_APPLICATION, BASE等

  MODULE_TYPE     = UEFI_APPLICATION

  #可自行修改

  VERSION_STRING = 1.0

  #入口函數

  ENTRY_POINT          = ShellCEntryLib

#

#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC

#

#主要的編譯文件

[Sources]

  Hello.c

# .dec裡面定義include的路徑

[Packages]

  MdePkg/MdePkg.dec

  ShellPkg/ShellPkg.dec

#連結的函數庫

[LibraryClasses]

  ShellCEntryLib

  UefiLib

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 1.2 增加入口函數到Nt32Pkg\Nt32Pkg.dsc，注意紅色字所添加的位置

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[LibraryClasses]

  #

  # Entry point

  #

…

UefiApplicationEntryPoint|MdePkg/Library/UefiApplicationEntryPoint/UefiApplicationEntryPoint.inf

ShellCEntryLib|ShellPkg/Library/UefiShellCEntryLib/UefiShellCEntryLib.inf

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1.3 Hello.inf 添加到 Nt32Pkg.dsc 或UnixPkg.dsc 的[Components.IA32]部分

=============================================================

[Components.IA32]

…

  MdeModulePkg/Application/HelloWorld/HelloWorld.inf

  MyPkg/Application/Hello/Hello.inf

1.4 Hello.c

#include <Uefi.h>
#include <Library/UefiLib.h>

INTN EFIAPI
ShellAppMain (
  IN UINTN Argc,
  IN CHAR16 **Argv
  )
{
  Print(L"Hello !Welcome to the world of EDK II.\n"); //注意’P’大寫
  return(0);
}

1.5 再一次執行以下三行指令即可 

        (1) build cleanall

        (2) build

        (3) build run

1.6 在Shell中輸入 hello