npub1zdmwgufa05tqfv49tftj3pgawd995dcwkh2z4vpe4l5tne3har6qd3g0vj (npub1zdm…g0vj) I've actually worked on quite a few newlib-nano platforms where the crt0 did not actually initialize .data and I had to do that myself at the start of main.
It did, however, zeroize BSS.