Hi! Anyone knows how to compile code for STM32 (using gcc) which can be loaded at any position in flash and works ok?

[Krzysztof Sawicki]

Posted on December 09, 2016 at 08:34

I'm going to write 2 revisions of the same program to flash and make a bootloader which will start one of them, depending on some criterias.

#gcc-position-independend Note: this post was migrated and contained many threaded conversations, some content may be missing.

[gaurav patni]

Posted on August 16, 2017 at 06:57

Hi

Wagner.Joerg

,

request you please share the solution with details of require compiler - linker settings required.

[gaurav patni]

Posted on August 16, 2017 at 06:58

Hi

Wagner.Joerg

,

request you please share the solution with details of require compiler - linker settings required.

[Tesla DeLorean]

Posted on August 16, 2017 at 17:12

Do you understand the concept of the vector table used in the Cortex-Mx parts? You'll need to exclude a sector of RAM (512 byte aligned) into which you will need to create a new vector table, you'll go through the vectors adjusting the addresses to reflect the address you've chosen to place the executable code. After that you'll need to point SCB->VTOR at this new table. If you link the image with a ZERO based address you can add the new offset to each vector.

Work product might not be sharable, especially if you work in a competitive company. Apply your knowledge/appreciation of compilers, linkers and loaders when it comes to creating relocatable objects with the tools you have chosen.

[Joerg Wagner]

Posted on August 28, 2017 at 18:16

In my case:

int main(void)

{

/* USER CODE BEGIN 1 */

SCB->VTOR=0x080C0000; // my app is located at this address in Flash

...