41 lines
688 B
ArmAsm
41 lines
688 B
ArmAsm
.extern rv32_exception_entry
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.align 2
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.section .text.entry
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.globl _start
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.type _start,@function
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_start:
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csrc mstatus, 0x00000008
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csrw mie, 0
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la t0, rv32_exception_entry
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csrw mtvec, t0
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la sp, _stack_top
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/* Load data section */
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la a0, _load_data
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la a1, _data
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la a2, _edata
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bgeu a1, a2, begin_clear_bss
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clear_data:
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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, clear_data
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begin_clear_bss:
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// clear bss section
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la a0, _bss
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la a1, _ebss
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bgeu a0, a1, init_finish
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clear_bss:
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sw zero, (a0)
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addi a0, a0, 4
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bltu a0, a1, clear_bss
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init_finish:
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call main
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__die:
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j __die
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