gem5 readfile use file, not stdin, or else sh does not work to start interaction

README.adoc

@@ -11528,7 +11528,7 @@ So we can do it like:
 ....
 # Boot, checkpoint and exit.
 printf 'echo "setup run";m5 exit' > "$(./getvar gem5_readfile_file)"
-./run --emulator gem5 --eval 'm5 checkpoint;m5 readfile | sh'
+./run --emulator gem5 --eval 'm5 checkpoint;m5 readfile > /tmp/gem5.sh && sh /tmp/gem5.sh'
 
 # Restore and run the first benchmark.
 printf 'echo "first benchmark";m5 exit' > "$(./getvar gem5_readfile_file)"

rootfs_overlay/lkmc/gem5.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 # https://cirosantilli.com/linux-kernel-module-cheat#gem5-restore-new-script
 m5 checkpoint
+tmp="$(mktemp)"
+m5 readfile > "$tmp"
 m5 resetstats
-m5 readfile | sh
+sh "$tmp"
 m5 exit