GCC custom section length definition, out of range control

Question

I'm using GCC for and specific MCU target (to be accurate for AVR) I have a special external memory that I try to define a custom Section by using following command in linker options

-Wl,--section-start=.customsection=0x821000

and then using attribute inside the code just like this:

unsigned char X __attribute__((section (".customsection")));

everything is correct and works fine. But how can I define some limitation to this custom section that force the GCC linker to raise an error in case of overrun? By limitation I mean a way to define length of the section or end-address.

NZD · Accepted Answer · 2018-12-13 01:32:53Z

1

AFAIK, you can only specify the length in a linker file.

You would have to copy the linker file for your MCU and modify it.

For more information and examples see:
- https://www.avrfreaks.net/forum/create-new-section-ram
- https://www.avrfreaks.net/forum/custom-linker-script-atmega

answered Dec 13, 2018 at 1:32

NZD

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