How can I determine the starting address of the stack in CubeIDE?

DK.7 · ‎2024-01-26

In Keil, if you open a file with the extension .map, you can find information about starting address of stack and so on. See screen.

SofLit · ‎2024-01-26

Hello,

Go to STM32CubeIDE\Debug and open .map file. Try to find the line

_estack = (ORIGIN (RAM) + LENGTH (RAM))

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DK.7 · ‎2024-01-26

Thanks for the answer!

I found the desired line in .map file

_estack = (ORIGIN (RAM) + LENGTH (RAM))

and I don’t understand what to do with it. See screen.

SofLit · ‎2024-01-26

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DK.7 · ‎2024-01-26

Thank you, but how to find out the end address of stack from this file?

SofLit · ‎2024-01-26

_estack defines the end of the Stack which is the Top of the stack.

So normally the stack starts at: _estack - _Min_Stack_Size

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Tesla DeLorean · ‎2024-01-26

It should really use the space allocated by the linker, in this case ST just lets it descend into the end of the heap

See _sbrk implementation in syscalls.c

ST sets in to the end of RAM, and it auto-decrements from there, basically the first 32-bit word gets stored at _estack-4

_bstack = (ORIGIN (RAM) + LENGTH (RAM) - _Min_Stack_Size)

_estack = (ORIGIN (RAM) + LENGTH (RAM))

In the Keil builds the initial stack is set to __initial_sp, and descends too Stack_Mem

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