PeCoffLoaderEx.c

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#include "BasePeCoffLibInternals.h"
#include <Library/BaseLib.h>
 
RETURN_STATUS
PeCoffLoaderRelocateImageEx (
  IN UINT16     *Reloc,
  IN OUT CHAR8  *Fixup,
  IN OUT CHAR8  **FixupData,
  IN UINT64     Adjust
  )
{
  UINT32  Value;
  UINT32  Value2;
  UINT32  *RiscVHi20Fixup;
 
  switch ((*Reloc) >> 12) {
    case EFI_IMAGE_REL_BASED_RISCV_HI20:
      *(UINT64 *)(*FixupData) = (UINT64)(UINTN)Fixup;
      break;
 
    case EFI_IMAGE_REL_BASED_RISCV_LOW12I:
      RiscVHi20Fixup =  (UINT32 *)(*(UINT64 *)(*FixupData));
      if (RiscVHi20Fixup != NULL) {
        Value  = (UINT32)(RV_X (*RiscVHi20Fixup, 12, 20) << 12);
        Value2 = (UINT32)(RV_X (*(UINT32 *)Fixup, 20, 12));
        if (Value2 & (RISCV_IMM_REACH/2)) {
          Value2 |= ~(RISCV_IMM_REACH-1);
        }
 
        Value                    += Value2;
        Value                    += (UINT32)Adjust;
        Value2                    = RISCV_CONST_HIGH_PART (Value);
        *(UINT32 *)RiscVHi20Fixup = (RV_X (Value2, 12, 20) << 12) | \
                                    (RV_X (*(UINT32 *)RiscVHi20Fixup, 0, 12));
        *(UINT32 *)Fixup = (RV_X (Value, 0, 12) << 20) | \
                           (RV_X (*(UINT32 *)Fixup, 0, 20));
      }
 
      break;
 
    case EFI_IMAGE_REL_BASED_RISCV_LOW12S:
      RiscVHi20Fixup =  (UINT32 *)(*(UINT64 *)(*FixupData));
      if (RiscVHi20Fixup != NULL) {
        Value  = (UINT32)(RV_X (*RiscVHi20Fixup, 12, 20) << 12);
        Value2 = (UINT32)(RV_X (*(UINT32 *)Fixup, 7, 5) | (RV_X (*(UINT32 *)Fixup, 25, 7) << 5));
        if (Value2 & (RISCV_IMM_REACH/2)) {
          Value2 |= ~(RISCV_IMM_REACH-1);
        }
 
        Value                    += Value2;
        Value                    += (UINT32)Adjust;
        Value2                    = RISCV_CONST_HIGH_PART (Value);
        *(UINT32 *)RiscVHi20Fixup = (RV_X (Value2, 12, 20) << 12) | \
                                    (RV_X (*(UINT32 *)RiscVHi20Fixup, 0, 12));
        Value2           = *(UINT32 *)Fixup & 0x01fff07f;
        Value           &= RISCV_IMM_REACH - 1;
        *(UINT32 *)Fixup = Value2 | (UINT32)(((RV_X (Value, 0, 5) << 7) | (RV_X (Value, 5, 7) << 25)));
      }
 
      break;
 
    default:
      return RETURN_UNSUPPORTED;
  }
 
  return RETURN_SUCCESS;
}
 
BOOLEAN
PeCoffLoaderImageFormatSupported (
  IN  UINT16  Machine
  )
{
  /*
   * ARM64 and X64 may allow such foreign images to be used when
   * a driver implementing EDKII_PECOFF_IMAGE_EMULATOR_PROTOCOL is
   * present.
   */
  if ((Machine == IMAGE_FILE_MACHINE_RISCV64) ||
      (Machine == IMAGE_FILE_MACHINE_ARM64) ||
      (Machine == IMAGE_FILE_MACHINE_X64))
  {
    return TRUE;
  }
 
  return FALSE;
}
 
RETURN_STATUS
PeHotRelocateImageEx (
  IN UINT16     *Reloc,
  IN OUT CHAR8  *Fixup,
  IN OUT CHAR8  **FixupData,
  IN UINT64     Adjust
  )
{
  return RETURN_UNSUPPORTED;
}