.syntax unified
    .cpu cortex-a7
    .thumb
    @ Banner stub for SBL1 logger call at 0x802f690 (patched to bl here).
    @ r0 = string. Print raw bytes via UARTDM until NUL (cap 256).
    @ The original callee is noreturn (b.n self follows the call), so
    @ jump on to 0x802f694 (post-banner init) instead of returning.
    .text
    .global banner_stub
banner_stub:
    push {r4, lr}
    movw r3, #0xf000
    movt r3, #0x78a
bn_loop:
    ldrb r1, [r0], #1
    cbz r1, bn_done
    str r1, [r3, #0x70]
    b bn_loop
bn_done:
    ldr pc, =0x802f694