[edk2-devel] [edk2-staging/RISC-V-V2 PATCH v1 08/22]: MdePkg/BasePeCoff: Add RISC-V PE/Coff related code.

Abner Chang posted 22 patches 6 years, 5 months ago
[edk2-devel] [edk2-staging/RISC-V-V2 PATCH v1 08/22]: MdePkg/BasePeCoff: Add RISC-V PE/Coff related code.
Posted by Abner Chang 6 years, 5 months ago
Support RISC-V image relocation.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Abner Chang <abner.chang@hpe.com>
---
 MdePkg/Library/BasePeCoffLib/BasePeCoff.c          |   3 +-
 MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf     |   5 +
 MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni     |   4 +-
 .../Library/BasePeCoffLib/BasePeCoffLibInternals.h |   1 +
 .../Library/BasePeCoffLib/RiscV/PeCoffLoaderEx.c   | 149 +++++++++++++++++++++
 5 files changed, 160 insertions(+), 2 deletions(-)
 create mode 100644 MdePkg/Library/BasePeCoffLib/RiscV/PeCoffLoaderEx.c

diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoff.c b/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
index 07bb62f..97e0ff4 100644
--- a/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
+++ b/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
@@ -1,6 +1,6 @@
 /** @file
   Base PE/COFF loader supports loading any PE32/PE32+ or TE image, but
-  only supports relocating IA32, x64, IPF, and EBC images.
+  only supports relocating IA32, x64, IPF, ARM, RISC-V and EBC images.
 
   Caution: This file requires additional review when modified.
   This library will have external input - PE/COFF image.
@@ -17,6 +17,7 @@
 
   Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
   Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+  Portions Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
index 395c140..e5c8e66 100644
--- a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
+++ b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
@@ -3,6 +3,7 @@
 #  The IPF version library supports loading IPF and EBC PE/COFF image.
 #  The IA32 version library support loading IA32, X64 and EBC PE/COFF images.
 #  The X64 version library support loading IA32, X64 and EBC PE/COFF images.
+#  The RISC-V version library support loading RISC-V images.
 #
 #  Caution: This module requires additional review when modified.
 #  This library will have external input - PE/COFF image.
@@ -11,6 +12,7 @@
 #
 #  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
 #  Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+#  Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -41,6 +43,9 @@
 [Sources.ARM]
   Arm/PeCoffLoaderEx.c
 
+[Sources.RISCV64]
+  RiscV/PeCoffLoaderEx.c
+  
 [Packages]
   MdePkg/MdePkg.dec
 
diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni
index b0ea702..edc48cd 100644
--- a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni
+++ b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni
@@ -4,7 +4,8 @@
 // The IPF version library supports loading IPF and EBC PE/COFF image.
 // The IA32 version library support loading IA32, X64 and EBC PE/COFF images.
 // The X64 version library support loading IA32, X64 and EBC PE/COFF images.
-//
+// The RISC-V version library support loading RISC-V32 and RISC-V64 PE/COFF images.
+// 
 // Caution: This module requires additional review when modified.
 // This library will have external input - PE/COFF image.
 // This external input must be validated carefully to avoid security issue like
@@ -12,6 +13,7 @@
 //
 // Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
 // Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+// Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
 //
 // SPDX-License-Identifier: BSD-2-Clause-Patent
 //
diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoffLibInternals.h b/MdePkg/Library/BasePeCoffLib/BasePeCoffLibInternals.h
index b74277f..9c33703 100644
--- a/MdePkg/Library/BasePeCoffLib/BasePeCoffLibInternals.h
+++ b/MdePkg/Library/BasePeCoffLib/BasePeCoffLibInternals.h
@@ -2,6 +2,7 @@
   Declaration of internal functions in PE/COFF Lib.
 
   Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
diff --git a/MdePkg/Library/BasePeCoffLib/RiscV/PeCoffLoaderEx.c b/MdePkg/Library/BasePeCoffLib/RiscV/PeCoffLoaderEx.c
new file mode 100644
index 0000000..a99550f
--- /dev/null
+++ b/MdePkg/Library/BasePeCoffLib/RiscV/PeCoffLoaderEx.c
@@ -0,0 +1,149 @@
+/** @file
+  PE/Coff loader for RISC-V PE image
+
+  Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
+
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution. The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+**/
+#include "BasePeCoffLibInternals.h"
+#include <Library/BaseLib.h>
+
+//
+// RISC-V definition.
+//
+#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 RISC-V specific relocation fixup and is a no-op on
+  other instruction sets. 
+  RISC-V splits 32-bit fixup into 20bit and 12-bit with two relocation
+  types. We have to know the lower 12-bit fixup first then we can deal
+  carry over on high 20-bit fixup. So we log the high 20-bit in 
+  FixupData.
+
+  @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
+  )
+{
+  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;
+}
+
+/**
+  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
+  )
+{
+  if ((Machine == IMAGE_FILE_MACHINE_RISCV32) || (Machine ==  IMAGE_FILE_MACHINE_RISCV64)) {
+    return TRUE;
+  }
+
+  return FALSE;
+}
+
+/**
+  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
+  )
+{
+  return RETURN_UNSUPPORTED;
+}
-- 
2.7.4


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Re: [edk2-devel] [edk2-staging/RISC-V-V2 PATCH v1 08/22]: MdePkg/BasePeCoff: Add RISC-V PE/Coff related code.
Posted by Leif Lindholm 6 years, 5 months ago
On Wed, Sep 04, 2019 at 06:43:03PM +0800, Abner Chang wrote:
> Support RISC-V image relocation.
> 
> Contributed-under: TianoCore Contribution Agreement 1.0
> Signed-off-by: Abner Chang <abner.chang@hpe.com>
> ---
>  MdePkg/Library/BasePeCoffLib/BasePeCoff.c          |   3 +-
>  MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf     |   5 +
>  MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni     |   4 +-
>  .../Library/BasePeCoffLib/BasePeCoffLibInternals.h |   1 +
>  .../Library/BasePeCoffLib/RiscV/PeCoffLoaderEx.c   | 149 +++++++++++++++++++++
>  5 files changed, 160 insertions(+), 2 deletions(-)
>  create mode 100644 MdePkg/Library/BasePeCoffLib/RiscV/PeCoffLoaderEx.c
> 
> diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoff.c b/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
> index 07bb62f..97e0ff4 100644
> --- a/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
> +++ b/MdePkg/Library/BasePeCoffLib/BasePeCoff.c
> @@ -1,6 +1,6 @@
>  /** @file
>    Base PE/COFF loader supports loading any PE32/PE32+ or TE image, but
> -  only supports relocating IA32, x64, IPF, and EBC images.
> +  only supports relocating IA32, x64, IPF, ARM, RISC-V and EBC images.
>  
>    Caution: This file requires additional review when modified.
>    This library will have external input - PE/COFF image.
> @@ -17,6 +17,7 @@
>  
>    Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
>    Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
> +  Portions Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
>    SPDX-License-Identifier: BSD-2-Clause-Patent
>  
>  **/
> diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
> index 395c140..e5c8e66 100644
> --- a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
> +++ b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
> @@ -3,6 +3,7 @@
>  #  The IPF version library supports loading IPF and EBC PE/COFF image.
>  #  The IA32 version library support loading IA32, X64 and EBC PE/COFF images.
>  #  The X64 version library support loading IA32, X64 and EBC PE/COFF images.
> +#  The RISC-V version library support loading RISC-V images.
>  #
>  #  Caution: This module requires additional review when modified.
>  #  This library will have external input - PE/COFF image.
> @@ -11,6 +12,7 @@
>  #
>  #  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>  #  Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
> +#  Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
>  #
>  #  SPDX-License-Identifier: BSD-2-Clause-Patent
>  #
> @@ -41,6 +43,9 @@
>  [Sources.ARM]
>    Arm/PeCoffLoaderEx.c
>  
> +[Sources.RISCV64]
> +  RiscV/PeCoffLoaderEx.c
> +  
>  [Packages]
>    MdePkg/MdePkg.dec
>  
> diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni
> index b0ea702..edc48cd 100644
> --- a/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni
> +++ b/MdePkg/Library/BasePeCoffLib/BasePeCoffLib.uni
> @@ -4,7 +4,8 @@
>  // The IPF version library supports loading IPF and EBC PE/COFF image.
>  // The IA32 version library support loading IA32, X64 and EBC PE/COFF images.
>  // The X64 version library support loading IA32, X64 and EBC PE/COFF images.
> -//
> +// The RISC-V version library support loading RISC-V32 and RISC-V64 PE/COFF images.
> +// 

The above diff looks like you're adding a blank line and deleting
another one. This happens because you have added a trailing space on
the gap line. PatchCheck.py finds these.

/
    Leif

>  // Caution: This module requires additional review when modified.
>  // This library will have external input - PE/COFF image.
>  // This external input must be validated carefully to avoid security issue like
> @@ -12,6 +13,7 @@
>  //
>  // Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>  // Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
> +// Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
>  //
>  // SPDX-License-Identifier: BSD-2-Clause-Patent
>  //
> diff --git a/MdePkg/Library/BasePeCoffLib/BasePeCoffLibInternals.h b/MdePkg/Library/BasePeCoffLib/BasePeCoffLibInternals.h
> index b74277f..9c33703 100644
> --- a/MdePkg/Library/BasePeCoffLib/BasePeCoffLibInternals.h
> +++ b/MdePkg/Library/BasePeCoffLib/BasePeCoffLibInternals.h
> @@ -2,6 +2,7 @@
>    Declaration of internal functions in PE/COFF Lib.
>  
>    Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
> +  Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
>    SPDX-License-Identifier: BSD-2-Clause-Patent
>  
>  **/
> diff --git a/MdePkg/Library/BasePeCoffLib/RiscV/PeCoffLoaderEx.c b/MdePkg/Library/BasePeCoffLib/RiscV/PeCoffLoaderEx.c
> new file mode 100644
> index 0000000..a99550f
> --- /dev/null
> +++ b/MdePkg/Library/BasePeCoffLib/RiscV/PeCoffLoaderEx.c
> @@ -0,0 +1,149 @@
> +/** @file
> +  PE/Coff loader for RISC-V PE image
> +
> +  Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
> +
> +  This program and the accompanying materials
> +  are licensed and made available under the terms and conditions of the BSD License
> +  which accompanies this distribution. The full text of the license may be found at
> +  http://opensource.org/licenses/bsd-license.php
> +
> +  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> +  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
> +**/
> +#include "BasePeCoffLibInternals.h"
> +#include <Library/BaseLib.h>
> +
> +//
> +// RISC-V definition.
> +//
> +#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 RISC-V specific relocation fixup and is a no-op on
> +  other instruction sets. 
> +  RISC-V splits 32-bit fixup into 20bit and 12-bit with two relocation
> +  types. We have to know the lower 12-bit fixup first then we can deal
> +  carry over on high 20-bit fixup. So we log the high 20-bit in 
> +  FixupData.
> +
> +  @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
> +  )
> +{
> +  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;
> +}
> +
> +/**
> +  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
> +  )
> +{
> +  if ((Machine == IMAGE_FILE_MACHINE_RISCV32) || (Machine ==  IMAGE_FILE_MACHINE_RISCV64)) {
> +    return TRUE;
> +  }
> +
> +  return FALSE;
> +}
> +
> +/**
> +  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
> +  )
> +{
> +  return RETURN_UNSUPPORTED;
> +}
> -- 
> 2.7.4
> 
> 
> 
> 

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