UEFI static lib

MyFirstPeiLib.c

/** @file
C:\udk2\OvmfPkg\TestByMy\PeiTest\MyFirstPeiLib\MyFirstPeiLib.c
  my first pei lib

**/

#include <Ppi/MyFirstPeiLib.h>
#include <Library/DebugLib.h>

/**
  This funtion return num1+num2

  @param[in]  firstnum      first number
  @param[in]  secendnum     second number

  @return reaslut
**/
UINTN
EFIAPI
add_function (
  IN UINTN           num1,
  IN UINTN           num2
  )
{
  return num1+num2;
}



/**
  This funtion return num1-num2

  @param[in]  firstnum      first number
  @param[in]  secendnum     second number

  @return reaslut
**/
UINTN
EFIAPI
sub_function (
  IN UINTN           num1,
  IN UINTN           num2
  )
{
  return num1-num2;
}

/**
  This funtion is  printf  str in debug

  @param[in]  Mesg          string

  @return status
**/
EFI_STATUS
EFIAPI
PrintHelloMesg (
  IN CHAR16          *Mesg
  )
{
  DEBUG ((EFI_D_ERROR, "MyHelloWorldPPI PrintHelloMsg : %s \n",Mesg));

  return EFI_SUCCESS;
}

MyFirstPeiLib.inf

## @file
#  PEI Test Library.
#
#
# Copyright (c) --
#
#
##

[Defines]
  INF_VERSION                    = 0x00010005
  BASE_NAME                      = myfirstpeilib
  FILE_GUID                      = 7488FC06-370A-1C41-AAAA-7395559A535A
  MODULE_TYPE                    = PEIM
  VERSION_STRING                 = 1.0
  LIBRARY_CLASS                  = MyFirstPeiLib|PEIM PEI_CORE


[Sources]
  MyFirstPeiLib.c

[Packages]
  MdePkg/MdePkg.dec
  OvmfPkg/OvmfPkg.dec

[LibraryClasses]
  DebugLib

OvmfPkgX64.dsc

//C:\udk2\OvmfPkg\OvmfPkgX64.dsc
 #my write
  MyFirstPeiLib|OvmfPkg/TestByMy/PeiTest/MyFirstPeiLib/MyFirstPeiLib.inf

[LibraryClasses.common]