On 03/16/16 12:24, Ard Biesheuvel wrote:
> Change our resolution for the previously unused CpuExceptionHandlerLib
> from the null implementation to the newly added implementation specific
> to AARCH64 and ARM. This is needed since our CpuDxe will start using it
> in a subsequent patch.
> 
> Contributed-under: TianoCore Contribution Agreement 1.0
> Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
> ---
>  ArmVirtPkg/ArmVirt.dsc.inc | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/ArmVirtPkg/ArmVirt.dsc.inc b/ArmVirtPkg/ArmVirt.dsc.inc
> index 5938cb4ebfcb..db31b2dc4cfe 100644
> --- a/ArmVirtPkg/ArmVirt.dsc.inc
> +++ b/ArmVirtPkg/ArmVirt.dsc.inc
> @@ -83,7 +83,7 @@ [LibraryClasses.common]
>    # ARM Architectural Libraries
>    
> CacheMaintenanceLib|ArmPkg/Library/ArmCacheMaintenanceLib/ArmCacheMaintenanceLib.inf
>    
> DefaultExceptionHandlerLib|ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerLib.inf
> -  
> CpuExceptionHandlerLib|MdeModulePkg/Library/CpuExceptionHandlerLibNull/CpuExceptionHandlerLibNull.inf
> +  CpuExceptionHandlerLib|ArmPkg/Library/ArmExceptionLib/ArmExceptionLib.inf
>    ArmDisassemblerLib|ArmPkg/Library/ArmDisassemblerLib/ArmDisassemblerLib.inf
>    DmaLib|ArmPkg/Library/ArmDmaLib/ArmDmaLib.inf
>    ArmGicLib|ArmPkg/Drivers/ArmGic/ArmGicLib.inf
> 

Acked-by: Laszlo Ersek <ler...@redhat.com>

Can you pls summarize in a few words what the exception handlers will
do? For example, in OVMF's case, a register dump is written to the
serial port, and the image and the exception address into it are named too.

Thanks
Laszlo
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