反编译andriod dtbo.img 为dts

反编译andriod dtbo.img 为dts

需要的两个工具

1. mkdtimg
   在源码目录out/host/linux-x86/bin/mkdtimg

  mkdtimg 

    commands:
      help, dump, create, cfg_create

  mkdtimg help all
  mkdtimg help 

    commands:
      help, dump, create, cfg_create

  mkdtimg dump  (...)

    options:
      -o, --output   Output file name.
                               Default is output to stdout.
      -b, --dtb      Dump dtb/dtbo files from image.
                               Will output to .0, .1, etc.

  mkdtimg create  (...) ( (...) ...)

    global_options:
      --page_size      Output page size. Default: 2048
      --version       DTBO version. Default: 0
      --id=       The default value to set property id in dt_table_entry. Default: 0
      --rev=
      --custom0=
      --custom1=
      --custom2=
      --custom3=

      The value could be a number or a DT node path.
       could be a 32-bits digit or hex value, ex. 68000, 0x6800.
       format is :, ex. /board/:id,
      will read the value in given FTB file with the path.

  mkdtimg cfg_create   (...)

    options:
      -d, --dtb-dir            The path to load dtb files.

从它的帮助信息可以看出， 使用mkdtimg dump dtbo.img -b 命令，可以将dtbo.img中的dtb提取出来，命名为 .0, .1, etc.
2. dtc
在源码目录out/host/linux-x86/bin/dtc

Usage: dtc [options] 

Options: -[qI:O:o:V:d:R:S:p:a:fb:i:H:sW:E:@Ahv]
  -q, --quiet                
	Quiet: -q suppress warnings, -qq errors, -qqq all
  -I, --in-format       
	Input formats are:
		dts - device tree source text
		dtb - device tree blob
		fs  - /proc/device-tree style directory
  -o, --out             
	Output file
  -O, --out-format      
	Output formats are:
		dts - device tree source text
		dtb - device tree blob
		asm - assembler source
  -V, --out-version     
	Blob version to produce, defaults to 17 (for dtb and asm output)
  -d, --out-dependency  
	Output dependency file
  -R, --reserve         
	Make space for  reserve map entries (for dtb and asm output)
  -S, --space           
	Make the blob at least  long (extra space)
  -p, --pad             
	Add padding to the blob of  long (extra space)
  -a, --align           
	Make the blob align to the  (extra space)
  -b, --boot-cpu        
	Set the physical boot cpu
  -f, --force                
	Try to produce output even if the input tree has errors
  -i, --include         
	Add a path to search for include files
  -s, --sort                 
	Sort nodes and properties before outputting (useful for comparing trees)
  -H, --phandle         
	Valid phandle formats are:
		legacy - "linux,phandle" properties only
		epapr  - "phandle" properties only
		both   - Both "linux,phandle" and "phandle" properties
  -W, --warning         
	Enable/disable warnings (prefix with "no-")
  -E, --error           
	Enable/disable errors (prefix with "no-")
  -@, --symbols              
	Enable generation of symbols
  -A, --auto-alias           
	Enable auto-alias of labels
  -h, --help                 
	Print this help and exit
  -v, --version              
	Print version and exit

从帮助信息上，可以看出，只要使用dtc -I dtb -O dts -o 就可以将上面生成的dtb文件转换为dts文件