SNIP_CLASSIC_OS_SECTION_7_7_5_2_Requirements

7.7.5.2 Requirements [SWS_Os_00451] Upstream requirements: SRS_Os_11001 ⌈The Operating System module shall allow exporting services from trusted OS-Applications.⌋ The Operating System module provides the service CallTrustedFunction (see [SWS_Os_00097]) to call a trusted function from a (trusted or non-trusted) OS-Application. [SWS_Os_00100] Upstream requirements: SRS_BSW_00323 ⌈If CallTrustedFunction is called and the called trusted function is not configured the Operating System module shall call the ErrorHook with E_OS_SERVICEID.⌋ The Operating System module provides the services CheckISRMemoryAccess and CheckTaskMemoryAccess (see [SWS_Os_00512] and [SWS_Os_00513]) for OS-Applications to check if a memory region is write/read/execute accessible from a Task/ Category 2 ISR and also return information if the memory region is part of the stack space.