/** @file
  Declaration of internal functions in PE/COFF Lib.

  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
  Portions Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef __BASE_PECOFF_LIB_INTERNALS__
#define __BASE_PECOFF_LIB_INTERNALS__

#include <Base.h>
#include <Library/PeCoffLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/PeCoffExtraActionLib.h>
#include <IndustryStandard/PeImage.h>

//
// Macro definitions for RISC-V architecture.
//
#define RV_X(x, s, n)  (((x) >> (s)) & ((1<<(n))-1))
#define RISCV_IMM_BITS   12
#define RISCV_IMM_REACH  (1LL<<RISCV_IMM_BITS)
#define RISCV_CONST_HIGH_PART(VALUE) \
  (((VALUE) + (RISCV_IMM_REACH/2)) & ~(RISCV_IMM_REACH-1))

/**
  Performs an Itanium-based specific relocation fixup and is a no-op on other
  instruction sets.

  @param  Reloc       The pointer to the relocation record.
  @param  Fixup       The pointer to the address to fix up.
  @param  FixupData   The pointer to a buffer to log the fixups.
  @param  Adjust      The offset to adjust the fixup.

  @return Status code.

**/
RETURN_STATUS
PeCoffLoaderRelocateImageEx (
  IN UINT16     *Reloc,
  IN OUT CHAR8  *Fixup,
  IN OUT CHAR8  **FixupData,
  IN UINT64     Adjust
  );

/**
  Performs an Itanium-based specific re-relocation fixup and is a no-op on other
  instruction sets. This is used to re-relocated the image into the EFI virtual
  space for runtime calls.

  @param  Reloc       The pointer to the relocation record.
  @param  Fixup       The pointer to the address to fix up.
  @param  FixupData   The pointer to a buffer to log the fixups.
  @param  Adjust      The offset to adjust the fixup.

  @return Status code.

**/
RETURN_STATUS
PeHotRelocateImageEx (
  IN UINT16     *Reloc,
  IN OUT CHAR8  *Fixup,
  IN OUT CHAR8  **FixupData,
  IN UINT64     Adjust
  );

/**
  Returns TRUE if the machine type of PE/COFF image is supported. Supported
  does not mean the image can be executed it means the PE/COFF loader supports
  loading and relocating of the image type. It's up to the caller to support
  the entry point.

  @param  Machine   Machine type from the PE Header.

  @return TRUE if this PE/COFF loader can load the image

**/
BOOLEAN
PeCoffLoaderImageFormatSupported (
  IN  UINT16  Machine
  );

/**
  Retrieves the magic value from the PE/COFF header.

  @param  Hdr             The buffer in which to return the PE32, PE32+, or TE header.

  @return EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC - Image is PE32
  @return EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC - Image is PE32+

**/
UINT16
PeCoffLoaderGetPeHeaderMagicValue (
  IN  EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION  Hdr
  );

/**
  Retrieves the PE or TE Header from a PE/COFF or TE image.

  @param  ImageContext    The context of the image being loaded.
  @param  Hdr             The buffer in which to return the PE32, PE32+, or TE header.

  @retval RETURN_SUCCESS  The PE or TE Header is read.
  @retval Other           The error status from reading the PE/COFF or TE image using the ImageRead function.

**/
RETURN_STATUS
PeCoffLoaderGetPeHeader (
  IN OUT PE_COFF_LOADER_IMAGE_CONTEXT         *ImageContext,
  OUT    EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION  Hdr
  );

/**
  Converts an image address to the loaded address.

  @param  ImageContext      The context of the image being loaded.
  @param  Address           The address to be converted to the loaded address.
  @param  TeStrippedOffset  Stripped offset for TE image.

  @return The converted address or NULL if the address can not be converted.

**/
VOID *
PeCoffLoaderImageAddress (
  IN OUT PE_COFF_LOADER_IMAGE_CONTEXT  *ImageContext,
  IN     UINTN                         Address,
  IN     UINTN                         TeStrippedOffset
  );

#endif