stack underflow and overflow control

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stack underflow and overflow control

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smt87
Contributor II

Hi,

I want to control stack underflow and overflow. I use S32K116. I know it does not have DWT module. How can i control this safety controls in any way? What can i do for testing stack underflow?

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PetrS
NXP TechSupport
NXP TechSupport

Hi,

if a stack is placed at beginning/end of SRAM then you can get a hard fault as soon as the stack overflows/underflow.
Or software can write a unique guard value to the SRAM area at the stack limit address. The software checks this address periodically. If guard value is overwritten, a stack overflow/underflow fault is reported by SW.

BR, Petr

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PetrS
NXP TechSupport
NXP TechSupport

Hi,

if a stack is placed at beginning/end of SRAM then you can get a hard fault as soon as the stack overflows/underflow.
Or software can write a unique guard value to the SRAM area at the stack limit address. The software checks this address periodically. If guard value is overwritten, a stack overflow/underflow fault is reported by SW.

BR, Petr

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