[ABANDONED] Section definition by Linker

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  • [ABANDONED] Section definition by Linker

    I'm tryng to define some section with a string by Linker. But Linker outputs "linker expression evaluates to undefined when constant expected".
    To do this, I use udata8 type. Is there any other type to definition section? Are there any other types besides udata8, udata16, udata32, sdata8, sdata16, sdata32 for Linker?

    Code example:
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    Source Code

    1. define section .data.mix {
    2. udata8 "Some string", udata8 'c', udata8 0x00, udata16 0x0000};
    3. define block Mix{
    4. section .data.mix
    5. };
    7. define region MixBlock = [start(RAM)+4k size (26*1)];
    9. place in MixBlock {block Mix};
    10. place in RAM1 { section .RAM1, section .RAM1.* };
    11. //
    12. // RAM Placement
    13. //
    14. place at start of RAM { block vectors_ram };
    15. place in RAM {// block TTable,
    16. section .non_init, section .non_init.*,
    17. block tls
    18. };
    19. place in RAM with auto order { section .fast, section .fast.*,
    20. section .data, section .data.*,
    21. section .bss, section .bss.* // Catch-all for zero-initialized data sections (e.g. .bss)
    22. };
    23. place in RAM { block heap}; // Heap reserved block
    24. place at end of RAM with fixed order { block stack_process,
    25. block stack };
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  • Hello,

    Thank you for your inquiry.
    You are using invalid linker syntax.

    If you want to place data you first need to define it in your targetapplication so a symbol gets assigned to it which then you can place in your linker script.

    It looks like you are trying to place a constant string in your firmware, correct?
    In this case do as follows:
    wiki.segger.com/How_to_place_variables_in_Flash

    Best regards,
    Nino
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