README.md

kernel_inject

kernel inject driver module, support register read/write, suspend and resume register inject function

Compile

Build kernel_inject.c as a ko module.

Add kernel_inject.c into kernel driver Makefile.

obj-m := kernel_inject.o

Usage

1. adb push kernel_inject.ko /data/

2. insmod /data/kernel_inject.ko

3. cd /sys/kernel/debug/inject

4. ls -l -rw------- 1 root root 0 2023-01-06 09:56 reg -rw------- 1 root root 0 2023-01-06 09:56 resume_reg_cfg -rw------- 1 root root 0 2023-01-06 09:56 suspend_reg_cfg

5. 查看寄存器读写使用方法：cat reg

Usage: echo <CMD> <REG> <VAL> > <DEBUGFS>/inject/reg

Example 1: read one register
  echo "r 0x3451008c 1" > /d/inject/reg

Example 2: read multy registers
  echo "r 0x3451008c 10" > /d/inject/reg

Example 3: write register
  echo "w 0x3451008c 0x2" > /d/inject/reg

6. 配置进入suspend操作的寄存器

Example 1: suspend时将寄存器0x3451008c修改为0x2
    echo "0x3451008c 0x2 > /d/inject/suspend_reg_cfg

使用命令cat /d/inject/suspend_reg_cfg可以查看配置的寄存器序列

7. 配置resume操作的寄存器

Example 1: resume时将寄存器0x3451008c修改为0x1
    echo "0x3451008c 0x1 > /d/inject/resume_reg_cfg

使用命令cat /d/inject/resume_reg_cfg可以查看配置的寄存器序列