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ARMv8.1-M: Add PACBTI examples #17

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ARMv8.1-M: Add PACBTI examples #17

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Commits on Oct 7, 2024

  1. cortex-m85: Delete MPU PXN example 

    This example is going to be replaced by a new
example where MPU PXN feature along with PACBTI
security feature would be demonstrated.

Signed-off-by: Ahmed Ismail <Ahmed.Ismail@arm.com>
    @AhmedIsmail02
    AhmedIsmail02 committed Oct 7, 2024
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  2. cmsis: Add arm-corstone-platform-bsp submodule 

    Arm-Corstone-Platform-Bsp library is a Board support
package (BSP) library for Corstone-3xx family of target
platforms where it's implemented using the CMSIS-Driver
software API.

The Partner-Supported-Demos would benefit from this library
as it shall be consumed by examples demonstrated on Corstone-3xx
target platforms (ex. MPU PXN, and PACBTI example (to be added)).

This improvement prevents duplicating the contents of CMSIS
subdirectory for each example demonstrated on Corstone-3xx
target platforms.

Signed-off-by: Ahmed Ismail <Ahmed.Ismail@arm.com>
    @AhmedIsmail02
    AhmedIsmail02 committed Oct 7, 2024
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  3. cortex-m85: Add MPU PXN PACBTI example 

    This example demonstrates how the new
Pointer Authentication and Branch Target Identification
(PACBTI) along with the new MPU region attribute
Privileged eXecute Never (PXN) security features
can be used on Cortex-M85 processor.

The example is based on Corstone-315 Ecosystem Fixed
Virtual Platform (Arm Cortex-M85 CPU and Ethos-U55 NPU).

The example consists of three main tasks
(prvPacTask , prvBtiTask, and prvPxnTask).
The prvPacTask , and prvBtiTask tasks job is to trigger
the UsageFault exception by mimicking ROP
(Return Oriented Programming), JOP (Jump Oriented Programming)
security exploit attacks. Whereas, the privileged prvPxnTask
job is to trigger the MemoryFault exception by executing an
instruction from an MPU region with Privileged eXecute Never
(PXN) attribute set.

The example is compatible with Arm Compiler For
Embedded toolchain only. The support for GNU, and
IAR toolchains is not yet enabled due to known issues.

Signed-off-by: Ahmed Ismail <Ahmed.Ismail@arm.com>
    @AhmedIsmail02
    Ahmed Ismail authored and AhmedIsmail02 committed Oct 7, 2024
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  4. cortex-m85: Add non-MPU PACBTI example 

    This example demonstrates how the new
Pointer Authentication and Branch Target Identification
(PACBTI)security feature can be used on Cortex-M85 processor.

The example is based on Corstone-315 Ecosystem Fixed
Virtual Platform (Arm Cortex-M85 CPU and Ethos-U65 NPU).

The example consists of two main tasks
(prvPacTask , and prvBtiTask).
The prvPacTask , and prvBtiTask tasks job is to trigger
the UsageFault exception by mimicking ROP
(Return Oriented Programming), JOP (Jump Oriented Programming)
security exploit attacks.

The example is compatible with Arm Compiler For
Embedded toolchain only. The support for GNU, and
IAR toolchains is not yet enabled due to known issues.

Signed-off-by: Ahmed Ismail <Ahmed.Ismail@arm.com>
    @AhmedIsmail02
    AhmedIsmail02 committed Oct 7, 2024
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