Copy from https://android.googlesource.com/platform/system/core/+/android-7.1.1_r22/toolbox/r.c
This file need to enable the defconfig: CONFIG_DEVMEM=y CONFIG_DEVKMEM=y
Make and Install
- Download it
- copy to external
- make r_mem
- adb push xxxx/r_mem /system/bin/
Usage: TODO