How to ensure the safety of SP_EL0

Hi experts， In ARMv8, EL1/2/3 can use either their own stack pointer, SP_ELx or SP_EL0. SP_EL0 can be used in EL0. why it is safe to use SP_EL0 in EL1/2/3? I think the applications in EL0 may...
How to ensure the safety of SP_EL0

Hi experts， In ARMv8, EL1/2/3 can use either their own stack pointer, SP_ELx or SP_EL0. SP_EL0 can be used in EL0. why it is safe to use SP_EL0 in EL1/2/3? I think the applications in EL0 may...
Thread-safety protection of library functions

I have a project using an ARM9 and RL-ARM. I'm wanting to use the malloc series of functions and have read the page "Thread-safety in the ARM C libraries" at: http://www.keil.com/support/man...
Thread-safety protection of library functions

I have a project using an ARM9 and RL-ARM. I'm wanting to use the malloc series of functions and have read the page "Thread-safety in the ARM C libraries" at: http://www.keil.com/support/man...
Thread safety under RL-ARM

Are the standard memory allocation functions (new,delete,malloc and free) thread safe when using RL-ARM by default or do I have to implement the _mutex_ functions myself if so is it just the _mutex_...