Disable stack overflow check for MPU ports
Stack overflow check is not straight forward to implement for MPU ports
because of the following reasons:
1. The context is stroed in TCB and as a result, pxTopOfStack member
points to the context location in TCB.
2. System calls are executed on a separate privileged only stack.
It is still okay because an MPU region is used to protect task stack
which means task stack overflow will trigger an MPU fault.
Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>
armv8.1-m: Add task dedicated PAC key
To harden the security, each task is assigned a dedicated PAC key, so that attackers needs to guess the all the tasks' PAC keys right to exploit the system using Return Oriented Programming.
The kernel is now updated to support the following:
* A PAC key set with a random number generated and is saved in the task's context when a task is created.
* As part of scheduling, the task's PAC key is stored/restored to/from the task's context when a task is unscheduled/scheduled from/to run.
stack-overflow-check: Introduce portGET_CURRENT_TOP_OF_STACK macro
When MPU wrapper v2 is used, the task's context is stored in TCB and `pxTopOfStack`` member of TCB points to the context location in TCB. We, therefore, need to read PSP to find the task's current top of stack.
Signed-off-by: Ahmed Ismail <Ahmed.Ismail@arm.com>
* Adding in ability to support a library for freertos_config and a custom freertos_kernel_port (#558)
* Using single name definition for libraries everywhere. (#558)
* Supporting backwards compatibility with FREERTOS_CONFIG_FILE_DIRECTORY (#571)
* Removing compiler warnings for GNU and Clang. (#571)
* Added in documentation on how to consume from a main project. Added default PORT selection for native POSIX and MINGW platforms.
* Only adding freertos_config if it exists. Removing auto generation of it from a FREERTOS_CONFIG_FILE_DIRECTORY.
* Fixing clang and gnu compiler warnings.
* Adding in project information and how to compile for GNU/clang
* Fixing compiler issue with unused variable - no need to declare variable.
* Adding in compile warnings for linux builds that kernel is okay with using.
* Fixing more extra-semi-stmt clang warnings.
* Moving definition of hooks into header files if features are enabled.
* Fixing formatting with uncrustify.
* Fixing merge conflicts with main merge.
* Fixing compiler errors due to merge issues and formatting.
* Fixing Line feeds.
* Adding 'portNORETURN' into portmacros.h. Other Updates based on PR request
* Further clean-up of clang and clang-tidy issues.
* Removing compiler specific pragmas from common c files.
* Fixing missing lexicon entry and uncrustify formatting changes.
* Resolving merge issue multiple defnitions of proto for prvIdleTask
* Fixing formatting issues that are not covered by uncrustify. Use clang-tidy instead if you want this level of control.
* More uncrustify formatting issues.
* Fixing extra bracket in #if statement.
---------
Co-authored-by: Gaurav-Aggarwal-AWS <33462878+aggarg@users.noreply.github.com>
* uncrustify with github workflows
* Fix find expression
* Add uncrustify configuration file
* Uncrustify some files
* uncrustify some more files
* uncrustify more files
* Fix whitespace at end of lines
Co-authored-by: Cobus van Eeden <35851496+cobusve@users.noreply.github.com>
* Style: Change FreeRTOS websites in comments
* Style: Change freertos to FreeRTOS in comments
* Style: Remove broken link
Co-authored-by: Alfred Gedeon <gedeonag@amazon.com>
