Re: [Buildroot] Interested in board support for BeagleV-Ahead

[Kilian Zinnecker via buildroot <buildroot@buildroot.org>]

Hello Robert and Thomas,

I am making a bit of progress. However, I still have some issues.

[--SNIP--]

> Okay Kilian, these all build with
> x86_64-gcc-13.2.0-nolibc-riscv64-linux.tar.xz
> 
> opensbi:
> https://git.beagleboard.org/beaglev-ahead/beaglev-ahead-opensbi/-/tree/0.9-> 1.1.2-ubuntu u-boot:
> https://git.beagleboard.org/beaglev-ahead/beaglev-ahead-u-boot/-/tree/beagl
> ev-v2020.01-1.1.2-ubuntu linux:
> https://git.beagleboard.org/beaglev-ahead/beaglev-ahead-linux/-/tree/beagle
> v-v5.10.113-1.1.2-ubuntu
> 
> For bandwidth issues, please use the github mirrors directly in
> patches for buildroot, as these are push mirrored from
> git.beagleboard.org/ , at worst they lag by 10 minutes after a new
> commit
> 
> opensbi:
> https://github.com/beagleboard/beaglev-ahead-opensbi/tree/0.9-1.1.2-ubuntu
> u-boot:
> https://github.com/beagleboard/beaglev-ahead-u-boot/tree/beaglev-v2020.01-1
> .1.2-ubuntu linux:
> https://github.com/beagleboard/linux/tree/beaglev-v5.10.113-1.1.2-ubuntu

When buildroot compiles opensbi, I get a lot of "undefined reference to 
`__stack_chk_guard'" errors. I think that either the necessary "-fno-stack-
protector" flag is not active during build, or that the toolchain does not 
provide the necessary functions. I tried adding something similar like this

https://gitlab.com/buildroot.org/buildroot/-/blob/master/boot/arm-trusted-firmware/arm-trusted-firmware.mk?ref_type=heads#L67-72
https://gitlab.com/buildroot.org/buildroot/-/blob/master/boot/arm-trusted-firmware/Config.in?ref_type=heads#L234-251

to the opensbi config and make files, but it did not help. I also checked and 
the .config contains the following flags:

BR2_SSP_STRONG=y
BR2_SSP_OPTION="-fstack-protector-strong"
BR2_TARGET_OPENSBI_SSP=y
BR2_TARGET_OPENSBI_SSP_LEVEL="strong"

Does anyone have an idea? I can provide more info if needed.

Best regards,
Kilian


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