# devmem2

**Repository Path**: lisiwen945/devmem2

## Basic Information

- **Project Name**: devmem2
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2025-05-29
- **Last Updated**: 2025-05-29

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

Add support for the devmem2 tool in android system.It can read and write
physical addresses.

1. How to create the "/dev/mem" node in android system  
The "/dev/mem" node is not found in the default andorid system.Please enable the
CONFIG_DEVMEM option in android linux kernel.The CONFIG_DEVMEM option is used to
control whether to create the "/dev/mem" node. More details can be found in
"kernel/drivers/char/mem.c".
  
NOTE1: The DEVKMEM option is not supported on arm64. On arm64, VMALLOC_START <
PAGE_OFFSET, which confuses kmem read/write.  
NOTE2: [Operation not permitted], if you get this error, please disable CONFIG_STRICT_DEVMEM   
and CONFIG_IO_STRICT_DEVMEM option.  

2. How to compile  
Enter the devmem2 source directory:  
$ cd ${MY_ANDROID}/external  
$ git clone https://github.com/giraffesnn/devmem2.git  
$ source build/envsetup.sh  
$ lunch # Choose the platform/board  
$ mmm external/devmem2  
$ make snod # make system.img ignoring depencies