SashegDev
21 lines
490 B
ArmAsm
21 lines
490 B
ArmAsm
.syntax unified
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.cpu cortex-a7
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.thumb
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@ Banner stub for SBL1 logger call at 0x802f690 (patched to bl here).
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@ r0 = string. Print raw bytes via UARTDM until NUL (cap 256).
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@ Preserve lr (set by bl) and return to caller with r0=0.
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.text
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.global banner_stub
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banner_stub:
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push {r4, lr}
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movw r3, #0xf000
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movt r3, #0x78a
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bn_loop:
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ldrb r1, [r0], #1
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cbz r1, bn_done
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str r1, [r3, #0x70]
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b bn_loop
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bn_done:
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movs r0, #0
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pop {r4, pc}
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