esp8266: how to force library functions info ROM?

[krhodes@netboxsc.com]

I’m evaluating VisualGDB and need to control the placement of code into ROM vs. RAM. For code that I write, I see how to force a function into ROM by specifying  __attribute__((section(“.irom.text”)))  in the function declaration.

Looking at the map file, it seems that many library functions are put into RAM.

How do I force library functions into ROM (e.g. __addsf3 and all other floating point functions)? I want to have finer control of what I can easily debug.

Thanks…Keith Rhodes

[support]

Hi,

You can try it at your own risk by following the instructions in this thread: https://sysprogs.com/w/forums/topic/esp8266-iram1_0_seg-too-large/

Please note that the ESP8266 SDK is largely undocumented and unreliable and doing this may trigger strange bugs.

[Author]

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