[PATCH v13 00/24] Modernize U-Boot shell

[Francesco Dolcini]

Hello Tom, Francis

On Fri, Dec 29, 2023 at 07:55:37PM +0100, Francis Laniel wrote:
> Le jeudi 28 décembre 2023, 21:58:59 CET Tom Rini a écrit :
> > On Fri, 22 Dec 2023 22:02:20 +0100, Francis Laniel wrote:
> > > During 2021 summer, Sean Anderson wrote a contribution to add a new shell,
> > > based on LIL, to U-Boot [1, 2].
> > > While one of the goals of this contribution was to address the fact actual
> > > U-Boot shell, which is based on Busybox hush, is old there was a
> > > discussion
> > > about adding a new shell versus updating the actual one [3, 4].
> > > 
> > > So, in this series, with Harald Seiler, we updated the actual U-Boot shell
> > > to reflect what is currently in Busybox source code.
> > > Basically, this contribution is about taking a snapshot of Busybox
> > > shell/hush.c file (as it exists in commit 37460f5da) and adapt it to suit
> > > U-Boot needs.
> > > 
> > > [...]
> > 
> > Applied to u-boot/next, thanks!
> 
> Thank you for the merge!
> If there is any problem, do not hesitate to mail me and I will take care of 
> it!

This change, specifically setting the modern hush shell as default, is
breaking our boot script, just noticed since the current U-Boot master
has a regression for us.

We still need to figure out the exact details, here [1] you can find the
boot script (that has some placeholder that is replaced during build).

and the error is something like:

```
## Executing script at 90280000
Loading DeviceTree: k3-am625-verdin-nonwifi-dev.dtb
69025 bytes read in 11 ms (6 MiB/s)
82 bytes read in 9 ms (8.8 KiB/s)
Working FDT set to 90200000
syntax error at 'done'HUSH died!
resetting ...
```

that I _assume_ comes from this line

    env set set_apply_overlays 'env set apply_overlays "for overlay_file in \\${fdt_overlays}; do echo Applying Overlay: \\${overlay_file} && ${load_cmd} \\${loadaddr} \\${overlays_prefix}\\${overlay_file} && fdt apply \\${loadaddr}; env set overlay_file; done; true"'

[1] https://git.toradex.com/cgit/meta-toradex-bsp-common.git/tree/recipes-bsp/u-boot/u-boot-distro-boot/boot.cmd.in

Francesco