CODEWITHSUNDEEP
gccarmembeddedcortex-m
KLing
KLing

Reputation: 195

Stack Base Memory Address

Is there a simple way to find the stack base pointer programmatically? I am coding for an STM32F4 microcontroller and compiling with arm-none-eabi-gcc compiler.

When I was using the Arm C compiler packaged with Keil uVision 5 I could use the ABI function __user_initial_stackheap() to retrieve the stack base, but that doesn't seem to work with gcc.

Upvotes: 0

Views: 1412

Answers (1)

KLing
KLing

Reputation: 195

This depends on how the different memory sections are set up (typically in a linker script). For instance, the linker script for an STM32F4 may define the stack base as:

__stack = ORIGIN(RAM) + LENGTH(RAM);

Then the linker script variables can be accessed in C code with

extern uint32_t __stack;

void foo() {
  uint32_t stack_base = &__stack;
}

Upvotes: 1

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