diff options
Diffstat (limited to 'MdePkg/Library/BasePeCoffLib/Arm/PeCoffLoaderEx.c')
| -rw-r--r-- | MdePkg/Library/BasePeCoffLib/Arm/PeCoffLoaderEx.c | 249 |
1 files changed, 0 insertions, 249 deletions
diff --git a/MdePkg/Library/BasePeCoffLib/Arm/PeCoffLoaderEx.c b/MdePkg/Library/BasePeCoffLib/Arm/PeCoffLoaderEx.c deleted file mode 100644 index d6bf42738d..0000000000 --- a/MdePkg/Library/BasePeCoffLib/Arm/PeCoffLoaderEx.c +++ /dev/null @@ -1,249 +0,0 @@ -/** @file
- Specific relocation fixups for ARM architecture.
-
- Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
- Portions copyright (c) 2008 - 2010, Apple Inc. 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>
-
-
-/**
- Pass in a pointer to an ARM MOVT or MOVW immediate instruciton and
- return the immediate data encoded in the instruction.
-
- @param Instruction Pointer to ARM MOVT or MOVW immediate instruction
-
- @return Immediate address encoded in the instruction
-
-**/
-UINT16
-ThumbMovtImmediateAddress (
- IN UINT16 *Instruction
- )
-{
- UINT32 Movt;
- UINT16 Address;
-
- // Thumb2 is two 16-bit instructions working together. Not a single 32-bit instruction
- // Example MOVT R0, #0 is 0x0000f2c0 or 0xf2c0 0x0000
- Movt = (*Instruction << 16) | (*(Instruction + 1));
-
- // imm16 = imm4:i:imm3:imm8
- // imm4 -> Bit19:Bit16
- // i -> Bit26
- // imm3 -> Bit14:Bit12
- // imm8 -> Bit7:Bit0
- Address = (UINT16)(Movt & 0x000000ff); // imm8
- Address |= (UINT16)((Movt >> 4) & 0x0000f700); // imm4 imm3
- Address |= (((Movt & BIT26) != 0) ? BIT11 : 0); // i
- return Address;
-}
-
-
-/**
- Update an ARM MOVT or MOVW immediate instruction immediate data.
-
- @param Instruction Pointer to ARM MOVT or MOVW immediate instruction
- @param Address New addres to patch into the instruction
-**/
-VOID
-ThumbMovtImmediatePatch (
- IN OUT UINT16 *Instruction,
- IN UINT16 Address
- )
-{
- UINT16 Patch;
-
- // First 16-bit chunk of instruciton
- Patch = ((Address >> 12) & 0x000f); // imm4
- Patch |= (((Address & BIT11) != 0) ? BIT10 : 0); // i
- // Mask out instruction bits and or in address
- *(Instruction) = (*Instruction & ~0x040f) | Patch;
-
- // Second 16-bit chunk of instruction
- Patch = Address & 0x000000ff; // imm8
- Patch |= ((Address << 4) & 0x00007000); // imm3
- // Mask out instruction bits and or in address
- Instruction++;
- *Instruction = (*Instruction & ~0x70ff) | Patch;
-}
-
-
-
-/**
- Pass in a pointer to an ARM MOVW/MOVT instruciton pair and
- return the immediate data encoded in the two` instruction.
-
- @param Instructions Pointer to ARM MOVW/MOVT insturction pair
-
- @return Immediate address encoded in the instructions
-
-**/
-UINT32
-ThumbMovwMovtImmediateAddress (
- IN UINT16 *Instructions
- )
-{
- UINT16 *Word;
- UINT16 *Top;
-
- Word = Instructions; // MOVW
- Top = Word + 2; // MOVT
-
- return (ThumbMovtImmediateAddress (Top) << 16) + ThumbMovtImmediateAddress (Word);
-}
-
-
-/**
- Update an ARM MOVW/MOVT immediate instruction instruction pair.
-
- @param Instructions Pointer to ARM MOVW/MOVT instruction pair
- @param Address New addres to patch into the instructions
-**/
-VOID
-ThumbMovwMovtImmediatePatch (
- IN OUT UINT16 *Instructions,
- IN UINT32 Address
- )
-{
- UINT16 *Word;
- UINT16 *Top;
-
- Word = Instructions; // MOVW
- Top = Word + 2; // MOVT
-
- ThumbMovtImmediatePatch (Word, (UINT16)(Address & 0xffff));
- ThumbMovtImmediatePatch (Top, (UINT16)(Address >> 16));
-}
-
-
-
-/**
- Performs an ARM-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
- )
-{
- UINT16 *Fixup16;
- UINT32 FixupVal;
-
- Fixup16 = (UINT16 *) Fixup;
-
- switch ((*Reloc) >> 12) {
-
- case EFI_IMAGE_REL_BASED_ARM_MOV32T:
- FixupVal = ThumbMovwMovtImmediateAddress (Fixup16) + (UINT32)Adjust;
- ThumbMovwMovtImmediatePatch (Fixup16, FixupVal);
-
- if (*FixupData != NULL) {
- *FixupData = ALIGN_POINTER(*FixupData, sizeof(UINT64));
- // Fixup16 is not aligned so we must copy it. Thumb instructions are streams of 16 bytes.
- CopyMem (*FixupData, Fixup16, sizeof (UINT64));
- *FixupData = *FixupData + sizeof(UINT64);
- }
- break;
-
- case EFI_IMAGE_REL_BASED_ARM_MOV32A:
- ASSERT (FALSE);
- // break omitted - ARM instruction encoding not implemented
- 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_ARMTHUMB_MIXED) || (Machine == IMAGE_FILE_MACHINE_EBC)) {
- return TRUE;
- }
-
- return FALSE;
-}
-
-/**
- Performs an ARM-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
- )
-{
- UINT16 *Fixup16;
- UINT32 FixupVal;
-
- Fixup16 = (UINT16 *)Fixup;
-
- switch ((*Reloc) >> 12) {
-
- case EFI_IMAGE_REL_BASED_ARM_MOV32T:
- *FixupData = ALIGN_POINTER (*FixupData, sizeof (UINT64));
- if (*(UINT64 *) (*FixupData) == ReadUnaligned64 ((UINT64 *)Fixup16)) {
- FixupVal = ThumbMovwMovtImmediateAddress (Fixup16) + (UINT32)Adjust;
- ThumbMovwMovtImmediatePatch (Fixup16, FixupVal);
- }
- break;
-
- case EFI_IMAGE_REL_BASED_ARM_MOV32A:
- ASSERT (FALSE);
- // break omitted - ARM instruction encoding not implemented
- default:
- DEBUG ((EFI_D_ERROR, "PeHotRelocateEx:unknown fixed type\n"));
- return RETURN_UNSUPPORTED;
- }
-
- return RETURN_SUCCESS;
-}
-
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