43 lines
672 B
ArmAsm
43 lines
672 B
ArmAsm
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.section .init
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.globl _start
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.type _start,@function
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.extern main
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# .extern trap_handler
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.extern SW_handler
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.extern entry
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_start:
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la sp, _sp
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/* Load data section */
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la a0, _data_lma
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la a1, _data
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la a2, _edata
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bgeu a1, a2, 2f
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1:
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lw t0, (a0)
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sw t0, (a1)
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addi a0, a0, 4
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addi a1, a1, 4
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bltu a1, a2, 1b
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2:
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/* Clear bss section */
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la a0, __bss_start
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la a1, _end
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bgeu a0, a1, 2f
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1:
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sw zero, (a0)
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addi a0, a0, 4
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bltu a0, a1, 1b
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2:
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la a0, SW_handler
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csrw mtvec, a0
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/* Call global constructors */
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# la a0, __libc_fini_array
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# call __libc_init_array
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# j main
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j entry |