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# 定义入口点 _start，对应链接脚本的 ENTRY(_start)
.section .text.entry
.global _start
_start:
# 初始化栈（使用链接脚本中定义的 stack_top）
la sp, stack_top
# 调用 main 函数
call main
# main 返回后进入死循环
loop:
j loop