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Sync EDKII BaseTools to BaseTools project r1971

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10502 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
lgao4
2010-05-18 05:04:32 +00:00
parent 3dc8585e0a
commit 40d841f6a8
417 changed files with 3829 additions and 2563 deletions
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122
BaseTools/Source/C/Common/PeCoffLoaderEx.c
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@ -1,7 +1,7 @@
/** @file
Copyright (c) 2004 - 2008, Intel Corporation
All rights reserved. This program and the accompanying materials
Copyright (c) 2004 - 2008, Intel Corporation. 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
@ -315,3 +315,121 @@ PeCoffLoaderRelocateX64Image (
return RETURN_SUCCESS;
}
/**
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
*Instruction = (*Instruction & ~0x040f) | Patch;
// Second 16-bit chunk of instruction
Patch = Address & 0x000000ff; // imm8
Patch |= ((Address << 4) & 0x00007000); // imm3
Instruction++;
*Instruction = (*Instruction & ~0x70ff) | Patch;
}
/**
Performs an ARM-based specific relocation fixup and is a no-op on other
instruction sets.
@param Reloc Pointer to the relocation record.
@param Fixup Pointer to the address to fix up.
@param FixupData Pointer to a buffer to log the fixups.
@param Adjust The offset to adjust the fixup.
@return Status code.
**/
RETURN_STATUS
PeCoffLoaderRelocateArmImage (
IN UINT16 **Reloc,
IN OUT CHAR8 *Fixup,
IN OUT CHAR8 **FixupData,
IN UINT64 Adjust
)
{
UINT16 *Fixup16;
UINT16 FixupVal;
UINT16 *Addend;
Fixup16 = (UINT16 *) Fixup;
switch ((**Reloc) >> 12) {
case EFI_IMAGE_REL_BASED_ARM_THUMB_MOVW:
FixupVal = ThumbMovtImmediateAddress (Fixup16) + (UINT16)Adjust;
ThumbMovtImmediatePatch (Fixup16, FixupVal);
if (*FixupData != NULL) {
*FixupData = ALIGN_POINTER (*FixupData, sizeof (UINT16));
*(UINT16 *)*FixupData = *Fixup16;
*FixupData = *FixupData + sizeof (UINT16);
}
break;
case EFI_IMAGE_REL_BASED_ARM_THUMB_MOVT:
// For MOVT you need to know the lower 16-bits do do the math
// So this relocation entry is really two entries.
*Reloc = *Reloc + 1;
Addend = *Reloc;
FixupVal = (UINT16)(((ThumbMovtImmediateAddress (Fixup16) << 16) + Adjust + *Addend) >> 16);
ThumbMovtImmediatePatch (Fixup16, FixupVal);
if (*FixupData != NULL) {
*FixupData = ALIGN_POINTER (*FixupData, sizeof (UINT16));
*(UINT16 *)*FixupData = *Fixup16;
*FixupData = *FixupData + sizeof (UINT16);
}
break;
default:
return RETURN_UNSUPPORTED;
}
return RETURN_SUCCESS;
}