root@gzsd-virtual-machine:~/桌面/10.ddr# make
arm-linux-ld -T ddr.lds -o ddr.elf start.o clock.o sdram.o main.o uart.o
arm-linux-ld: .text has both ordered [`.ARM.exidx' in clock.o] and unordered [`.ARM.extab' in clock.o] sections
arm-linux-ld: final link failed: Bad value
make: *** [ddr.bin] 错误 1
