/** @file\r
\r
-Copyright (c) 2004 - 2008, Intel Corporation \r
-All rights reserved. This program and the accompanying materials \r
+Copyright (c) 2004 - 2008, Intel Corporation. All rights reserved.<BR>\r
+Portions Copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>\r
+This program and the accompanying materials \r
are licensed and made available under the terms and conditions of the BSD License \r
which accompanies this distribution. The full text of the license may be found at \r
http://opensource.org/licenses/bsd-license.php \r
\r
Abstract:\r
\r
- IA32, X64 and IPF Specific relocation fixups\r
+ IA32, X64, IPF, ARM and AArch64 Specific relocation fixups\r
\r
Revision History\r
\r
#include <Common/UefiBaseTypes.h>\r
#include <IndustryStandard/PeImage.h>\r
#include "PeCoffLib.h"\r
+#include "CommonLib.h"\r
+#include "EfiUtilityMsgs.h"\r
+\r
\r
#define EXT_IMM64(Value, Address, Size, InstPos, ValPos) \\r
Value |= (((UINT64)((*(Address) >> InstPos) & (((UINT64)1 << Size) - 1))) << ValPos)\r
return RETURN_SUCCESS;\r
}\r
\r
+/**\r
+ Pass in a pointer to an ARM MOVT or MOVW immediate instruciton and \r
+ return the immediate data encoded in the instruction\r
+\r
+ @param Instruction Pointer to ARM MOVT or MOVW immediate instruction\r
+\r
+ @return Immediate address encoded in the instruction\r
+\r
+**/\r
+UINT16\r
+ThumbMovtImmediateAddress (\r
+ IN UINT16 *Instruction\r
+ )\r
+{\r
+ UINT32 Movt;\r
+ UINT16 Address;\r
+\r
+ // Thumb2 is two 16-bit instructions working together. Not a single 32-bit instruction\r
+ // Example MOVT R0, #0 is 0x0000f2c0 or 0xf2c0 0x0000\r
+ Movt = (*Instruction << 16) | (*(Instruction + 1)); \r
+\r
+ // imm16 = imm4:i:imm3:imm8\r
+ // imm4 -> Bit19:Bit16\r
+ // i -> Bit26\r
+ // imm3 -> Bit14:Bit12\r
+ // imm8 -> Bit7:Bit0\r
+ Address = (UINT16)(Movt & 0x000000ff); // imm8\r
+ Address |= (UINT16)((Movt >> 4) & 0x0000f700); // imm4 imm3\r
+ Address |= (((Movt & BIT26) != 0) ? BIT11 : 0); // i\r
+ return Address;\r
+}\r
+\r
+\r
+/**\r
+ Update an ARM MOVT or MOVW immediate instruction immediate data.\r
+\r
+ @param Instruction Pointer to ARM MOVT or MOVW immediate instruction\r
+ @param Address New addres to patch into the instruction\r
+**/\r
+VOID\r
+ThumbMovtImmediatePatch (\r
+ IN OUT UINT16 *Instruction,\r
+ IN UINT16 Address\r
+ )\r
+{\r
+ UINT16 Patch;\r
+\r
+ // First 16-bit chunk of instruciton\r
+ Patch = ((Address >> 12) & 0x000f); // imm4 \r
+ Patch |= (((Address & BIT11) != 0) ? BIT10 : 0); // i\r
+ *Instruction = (*Instruction & ~0x040f) | Patch;\r
+\r
+ // Second 16-bit chunk of instruction\r
+ Patch = Address & 0x000000ff; // imm8\r
+ Patch |= ((Address << 4) & 0x00007000); // imm3\r
+ Instruction++;\r
+ *Instruction = (*Instruction & ~0x70ff) | Patch;\r
+}\r
+\r
+/**\r
+ Pass in a pointer to an ARM MOVW/MOVT instruciton pair and \r
+ return the immediate data encoded in the two` instruction\r
+\r
+ @param Instructions Pointer to ARM MOVW/MOVT insturction pair\r
+\r
+ @return Immediate address encoded in the instructions\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+ThumbMovwMovtImmediateAddress (\r
+ IN UINT16 *Instructions\r
+ )\r
+{\r
+ UINT16 *Word;\r
+ UINT16 *Top;\r
+ \r
+ Word = Instructions; // MOVW\r
+ Top = Word + 2; // MOVT\r
+ \r
+ return (ThumbMovtImmediateAddress (Top) << 16) + ThumbMovtImmediateAddress (Word);\r
+}\r
+\r
+\r
+/**\r
+ Update an ARM MOVW/MOVT immediate instruction instruction pair.\r
+\r
+ @param Instructions Pointer to ARM MOVW/MOVT instruction pair\r
+ @param Address New addres to patch into the instructions\r
+**/\r
+VOID\r
+EFIAPI\r
+ThumbMovwMovtImmediatePatch (\r
+ IN OUT UINT16 *Instructions,\r
+ IN UINT32 Address\r
+ )\r
+{\r
+ UINT16 *Word;\r
+ UINT16 *Top;\r
+ \r
+ Word = (UINT16 *)Instructions; // MOVW\r
+ Top = Word + 2; // MOVT\r
+\r
+ ThumbMovtImmediatePatch (Word, (UINT16)(Address & 0xffff));\r
+ ThumbMovtImmediatePatch (Top, (UINT16)(Address >> 16));\r
+}\r
+\r
+\r
+/**\r
+ Performs an ARM-based specific relocation fixup and is a no-op on other\r
+ instruction sets.\r
+\r
+ @param Reloc Pointer to the relocation record.\r
+ @param Fixup Pointer to the address to fix up.\r
+ @param FixupData Pointer to a buffer to log the fixups.\r
+ @param Adjust The offset to adjust the fixup.\r
+\r
+ @return Status code.\r
+\r
+**/\r
+RETURN_STATUS\r
+PeCoffLoaderRelocateArmImage (\r
+ IN UINT16 **Reloc,\r
+ IN OUT CHAR8 *Fixup,\r
+ IN OUT CHAR8 **FixupData,\r
+ IN UINT64 Adjust\r
+ )\r
+{\r
+ UINT16 *Fixup16;\r
+ UINT32 FixupVal;\r
+\r
+ Fixup16 = (UINT16 *) Fixup;\r
+\r
+ switch ((**Reloc) >> 12) {\r
+ \r
+ case EFI_IMAGE_REL_BASED_ARM_MOV32T:\r
+ FixupVal = ThumbMovwMovtImmediateAddress (Fixup16) + (UINT32)Adjust;\r
+ ThumbMovwMovtImmediatePatch (Fixup16, FixupVal);\r
+ \r
+ \r
+ if (*FixupData != NULL) {\r
+ *FixupData = ALIGN_POINTER(*FixupData, sizeof(UINT64));\r
+ *(UINT64 *)(*FixupData) = *Fixup16;\r
+ CopyMem (*FixupData, Fixup16, sizeof (UINT64));\r
+ }\r
+ break;\r
+ \r
+ case EFI_IMAGE_REL_BASED_ARM_MOV32A:\r
+ // break omitted - ARM instruction encoding not implemented\r
+ default:\r
+ return RETURN_UNSUPPORTED;\r
+ }\r
+\r
+ return RETURN_SUCCESS;\r
+}\r
+\r
+RETURN_STATUS\r
+PeCoffLoaderRelocateAArch64Image (\r
+ IN UINT16 *Reloc,\r
+ IN OUT CHAR8 *Fixup,\r
+ IN OUT CHAR8 **FixupData,\r
+ IN UINT64 Adjust\r
+ )\r
+/**\r
+ Performs an AArch64 specific relocation fixup\r
+\r
+ @param Reloc Pointer to the relocation record\r
+ @param Fixup Pointer to the address to fix up\r
+ @param FixupData Pointer to a buffer to log the fixups\r
+ @param Adjust The offset to adjust the fixup\r
+\r
+ @retval RETURN_SUCCESS Success to perform relocation\r
+ @retval RETURN_UNSUPPORTED Unsupported.\r
+**/\r
+{\r
+ UINT64 *F64;\r
+\r
+ switch ((*Reloc) >> 12) {\r
+\r
+ case EFI_IMAGE_REL_BASED_DIR64:\r
+ F64 = (UINT64 *) Fixup;\r
+ *F64 = *F64 + (UINT64) Adjust;\r
+ if (*FixupData != NULL) {\r
+ *FixupData = ALIGN_POINTER(*FixupData, sizeof(UINT64));\r
+ *(UINT64 *)(*FixupData) = *F64;\r
+ *FixupData = *FixupData + sizeof(UINT64);\r
+ }\r
+ break;\r
+\r
+ default:\r
+ return RETURN_UNSUPPORTED;\r
+ }\r
+\r
+ return RETURN_SUCCESS;\r
+}\r
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