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specify code section for functions in library

yl
Expert 1215 points


Hi,

Is there a way to specify certain functions in library to reside in one code section while the rest in another? For example, I want memcpy and a few math functions in IRAM and the rest of rts in SDRAM.

Thanks

 

  • 0
    TI__Mastermind 18130 points

    I think you need to rebuild the RTS (or at least the specific source files). I do not believe there is a way to tell the linker to place specific functions from an object file.

    If you rebuild the RTS you can use the #pragma CODE_SECTION(...) to create a custom code section and then specify where to place it in your linker command file. For more information on the CODE_SECTION pragma see the Compiler Guide.

  • 0 in reply to TimHarron
    TI__Mastermind 18130 points

    While the Pragma suggestion I made in the previous post is still correct and perfectly valid I wanted to clarify that you can indeed specify specific symbols from the RTS object files to be placed separately. This is because the RTS Library is built with the -mo option which generates a different compiler section for each symbol. I don't know if there's a way to default every other RTS function to SDRAM, but I'll look into this. For now know that you can use something like the below to place specific symbols into IRAM.

    .text:_memcpy > IRAM

  • 0 in reply to TimHarron
    Expert 1215 points

    Thanks.

    What about putting one entire lib, e.g. fastmath67x.lib, in a section?

  • 0 in reply to TimHarron
    TI__Mastermind 18130 points

    One final update for now. Section 7.8 of the Assembly Guide shows how to accomplish the other part, but thus far I have not been able to get this to build properly. I will have to research this more at a later time.