Push task stack content when task exit from run mode

Kernel
1

michaeln32 wrote on Tuesday, January 16, 2018:

Hi,

When task is exiting from run mode, It’s stack filled up with run time envierment registers.

Can you please tell me or give me a reference on what is the content and type of registers that are pushed in stack and the order they filled in.

I’m using MISP processor with freeRTOS kernel.

2

rtel wrote on Tuesday, January 16, 2018:

Do you mean MIPS? Rather than MISP?

Any processor register that is essential to the execution path of the
task is saved - both general purpose and special purpose registers.
Rather than go and look at the source files myself and list the
registers here I will just post a link to the source file so you can
look yourself - remember FreeRTOS is open source you can just read the
source files:

https://sourceforge.net/p/freertos/code/HEAD/tree/trunk/FreeRTOS/Source/portable/MPLAB/PIC32MX/port.c
(look at vPortInitialiseStack())

https://sourceforge.net/p/freertos/code/HEAD/tree/trunk/FreeRTOS/Source/portable/MPLAB/PIC32MX/ISR_Support.h
(look at portSAVE_CONTEXT())

3

michaeln32 wrote on Tuesday, January 16, 2018:

Thank you Richard !

Yes, I’m using MIPS.

Are the links above are representing MIPS processor ?