2939c778a3
Introduce ARM and AArch64 instances of the CpuExceptionHandlerLib which provides exception handling and registration of handlers regardless of execution phase. Two variants of the ArmExceptionLib are provided: one where exception handlers reside within the module (meeting appropriate architectural alignment requirements for the vector table) and another one that will relocate a copy of thee xception handlers to an address specified by PcdCpuVectorBaseAddress. The ArmRelocateExceptionLib is intended for use in cases where ArmExceptionLib is too large for the application (uncompressed XIP images) as driven by the vector table alignment padding. The AArch64 build of this library supports execution at EL1, EL2, and EL3 exception levels. Tested on ARM, and AArch64 with SEC, DXE Core, and CpuDxe modules. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Eugene Cohen <eugene@hp.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
66 lines
2.2 KiB
INI
66 lines
2.2 KiB
INI
## @file
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# Instance of CpuExceptionHandlerLib Library for ARM/AArch64 architectures
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#
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# This library instance is used when exception vectors must be relocated to
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# a specific address. The address is specified by PcdCpuVectorBaseAddress.
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# Since the alignment requirement for in-place exception handlers causes
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# image size to increase, this instance is useful for modules that need to
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# minimize space used in their FV (like XIP modules). See ArmExceptionLib.inf
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# for the in-place exception handler alternative.
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#
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# Copyright (c) 2011-2012, ARM Limited. All rights reserved.
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# Copyright (c) 2016 HP Development Company, L.P.
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#
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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#
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[Defines]
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INF_VERSION = 0x00010005
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BASE_NAME = ArmRelocateExceptionLib
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FILE_GUID = 62AA447A-1FBA-429E-9E0D-CE0D2D8DCF58
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MODULE_TYPE = BASE
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VERSION_STRING = 1.0
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LIBRARY_CLASS = CpuExceptionHandlerLib
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[Sources.common]
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ArmExceptionLib.c
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[Sources.Arm]
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Arm/ArmException.c
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Arm/ExceptionSupport.asm | RVCT
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Arm/ExceptionSupport.S | GCC
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[Sources.AARCH64]
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AArch64/AArch64Exception.c
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AArch64/ExceptionSupport.S
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[Packages]
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MdePkg/MdePkg.dec
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MdeModulePkg/MdeModulePkg.dec
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ArmPkg/ArmPkg.dec
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[LibraryClasses]
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ArmLib
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DebugLib
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DefaultExceptionHandlerLib
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BaseMemoryLib
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CacheMaintenanceLib
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[Pcd]
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gArmTokenSpaceGuid.PcdDebuggerExceptionSupport
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gArmTokenSpaceGuid.PcdCpuVectorBaseAddress
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[BuildOptions]
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# We must pass a define to specify that we are relocating vectors so the
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# vector alignment is relaxed (space savings); note that this must be done
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# as a define and not a PCD since it affects assembly directives.
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*_*_*_PP_FLAGS = -DARM_RELOCATE_VECTORS
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*_*_*_CC_FLAGS = -DARM_RELOCATE_VECTORS
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