ESP8266 Community Forum

- Mon Nov 10, 2014 5:07 am #2399

AFAIK there should be some cleaner way to send huge chunks of code to 'irom0.text' with some linker magic that doesn't require such bloody patching. Btw, remind me, does xtensa-gcc support -fPIC?

That'd be awesome, unfortunately I don't know enough about the linking to say if/how that's possible.

- Mon Nov 10, 2014 5:29 am #2402

AFAIK there should be some cleaner way to send huge chunks of code to 'irom0.text' with some linker magic that doesn't require such bloody patching. Btw, remind me, does xtensa-gcc support -fPIC?

That'd be awesome, unfortunately I don't know enough about the linking to say if/how that's possible.

The most straightforward way I see is combining all the library code into one .o and then objcopy --rename-section .text=.irom0text
Not sure it will work, but it's worth giving a try.

Blog|github

- Mon Nov 10, 2014 5:59 am #2405 Wouldn't that destroy the references (i.e. jump targets)? Or is objcopy smart enough about that?

- Mon Nov 10, 2014 7:12 am #2411

libhal.a source is in the windows VM.
liblwip is upstream lwip 1.4.0 RC2, but with added ICACHE_FLASH_ATTR so that it's loaded off to the flash.

AFAIK there should be some cleaner way to send huge chunks of code to 'irom0.text' with some linker magic that doesn't require such bloody patching.

viewtopic.php?f=9&t=224&start=80#p1385

Btw, remind me, does xtensa-gcc support -fPIC?

It should, but why would you need that?