RTEMS | Draft: cpukit/age_verify: Add optional state-mandated age verification API (!1137)

[Kinsey Moore (@opticron)]

Kinsey Moore started a new discussion on cpukit/libage/age_verify.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1137#note_145718

 > +    if (_Age_Locked) return RTEMS_NOT_CONFIGURED;
 > +
 > +    _Age_Data.age_bracket = (uint32_t)bracket;
 > +    _Age_Locked = true;
 > +    return RTEMS_SUCCESSFUL;
 > +}
 > +
 > +uint8_t rtems_age_get_signal(void) {
 > +    // Verify the integrity of the age data before returning it. 
 > +    // If the guard values have been tampered with, this likely 
 > +    // indicates memory corruption or a tampering attempts.
 > +    if (_Age_Data.lower_guard != AGE_GUARD_PATTERN || 
 > +        _Age_Data.upper_guard != AGE_GUARD_PATTERN) {
 > +        
 > +        rtems_fatal(RTEMS_FATAL_SOURCE_STACK_CHECKER, 0xBAD1D);
 > +    }

This seems out of place. In general, RTEMS does not perform extra checks like this outside the stack checker itself.

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1137#note_145718
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