MIT6.S081 Lab4: Trap
RISC-V assembly(easy)a0-a7. a2无函数调用位于0x630ra中是0x00输出为 He110 World，如果是大段存储，i应该为0x726c64，57616不需要改Backtrace(moderate)在kernel/defs.h中添加函数声明void backtrace(void)在kernel/riscv.h中添加以下字段：// get frame pointerstatic inline uint64r_fp(){
