MCUboot fails to chain-load image on nRF54L15

Good morning,

currently we are on ncs SDK v2.7.0.

Because SDK v2.8.0 supports the KMU in MCUboot on the nRF54L15, I updated immediately and gave it a try.

Unfortunately, I encountered an odd behaviour when it comes to MCUboot and chain loading of the application.

The CPU resets somewhere behind ZEPHYR_BOOT_LOG_STOP() call (see bootloader/mcuboot/boot/zephyr/main.c:627).

I tried to debug this behaviour. Suprisingly, in debug mode, this does not happen.

So, I tried to go one step back and just gave the zephyr/samples/subsys/mgmt/mcumgr/smp_svr a try for the nrf54l15dk board target.

Unfortunately, this sample does not even compile without error (i.e. undefined reference to `z_impl_k_sem_take`).

Help appreciated.

Best regards,

Christian

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