noinit region of RAM also takes up Flash space

RE: noinit region of RAM also takes up Flash space

Hieu — Fri, 05 Jul 2024 14:30:29 GMT

Hi tf_tdm,

[quote user="tf_tdm"]Could it be related with the nRF Connect SDK version ? I'm on 2.6.99-cs2 , although I just saw in the getting started guide that -cs1 is the one recommended. Or should we take a more recent version, e.g. one of the 2.7.0 tags ?[/quote]

It's hard to tell for sure, but my hunch is that the version doesn't matter. I would try to look at something else first, but you can explore that direction if you wish.

[quote user="tf_tdm"]Regarding the setup, we build using nrf-docker with very little modifications, sdk_nrf_version=v2.6.99-cs2 as parameter and the toolchain 2.6.0. The Dockerfile is based on nrf-docker hash 8ffb5e32e549c205834ffcc976df615f96715a75 (still the latest commit of the main branch at the time I'm writing this)[/quote]

I am honestly unfamiliar with the Docker setup, and I worry that for me to learn it and then set up will take significant amount of time, more so during this busy summertime.

Could you please try building my project on your setup to see if the issue is reproduced?
Here is it: devzone.nordicsemi.com/.../hello_5F00_world_5F00_261_5F00_01.zip

If not, could you create a minimal setup where you reproduce the issue and send it to me?

Hieu

RE: noinit region of RAM also takes up Flash space

tf_tdm — Thu, 04 Jul 2024 09:22:15 GMT

Hi Hieu, thanks for looking into this. Could it be related with the nRF Connect SDK version ? I'm on 2.6.99-cs2 , although I just saw in the getting started guide that -cs1 is the one recommended. Or should we take a more recent version, e.g. one of the 2.7.0 tags ?

Regarding the setup, we build using nrf-docker with very little modifications, sdk_nrf_version=v2.6.99-cs2 as parameter and the toolchain 2.6.0. The Dockerfile is based on nrf-docker hash 8ffb5e32e549c205834ffcc976df615f96715a75 (still the latest commit of the main branch at the time I'm writing this)

RE: noinit region of RAM also takes up Flash space

Hieu — Wed, 03 Jul 2024 14:20:16 GMT

Hi tf_tdm,

I tried to do replicate your issue myself with Hello World sample, but I cannot reproduce it. The variables don't take space on FLASH as expected.

I tried to have another array with initialized value but still .noinit, but runs into some error with the linker trying to put it into bss. I didn't try to further to make it work.

Could you please give more details about your setup so that I can reproduce it and try to find out what is wrong?

Hieu