43 lines
598 B
ArmAsm
43 lines
598 B
ArmAsm
start_:
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set r0, main
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or pc, r0, r0
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hello:
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.word 0x4865
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.word 0x6c6c
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.word 0x6f2c
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.word 0x2077
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.word 0x6f72
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.word 0x6c64
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.word 0x2100
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uart_send: // r0 is pointer to data, r1, length
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set r2, 0
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set r3, 0x10
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seth r3, 0xc0
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set r4, 1
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loop0:
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load r5, [r3, 2]
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and r5, r5, r4
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cmp r5, r2
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beq loop0
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load r5, [r0]
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and r6, r0, r4
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cmp r6, r4
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beq [pc, 2]
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shr r5, r5, 8
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store r5, [r3]
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add r0, r0, r4
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sub r1, r1, r4
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cmp r1, r2
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bneq loop0
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or pc, lr, lr
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main:
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set r0, hello
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set r1, 13
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set r2, uart_send
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set r3, main
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or lr, r3, r3
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or pc, r2, r2
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