EC600G/tools/win32/doc/dtools-sffsdump.md

dtools sffsdump

This will parse flash dump file, and parse file system (SFFS) structure, and write files and directories to local PC.

It can support 2 kinds of images: raw flash image or flash logical bin. Raw flash image is just the image of flash. Logical bin is logic blocks inside flash, which can be generated by dtools fbdevdump2 command.

Example

dtools sffsdump --flash 0x340000,0x160000,0x8000,0x200 flash.bin dumpdir

The option --flash is to specify the flash layout of file system image. The format is start,size,eb_size,pb_size. The option of start is flash offset, not flash address. This parameters should match the flash layout in target.

For example, on 8910, the physical address of flash is 0x60000000. So, 0x60340000 is the flash address, 0x340000 is the flash offset.

After parsing file system structure, the files and directories inside flash image will be write under dumpdir of local PC. When dumpdir already exists, it will report error, to avoid overwrite.

The path on target will have mount point prefix. For example, if the file system is mounted to /factory on target:

Path On PC	Path On Target
dumpdir/filename	/factory/filename

Sub-partitions

Sub-partition feature is rare used.

When there are multiple sub-partitions on one flash block device, --offset shall be specified, and it is the starting logical block of the sub-partition. For example:

dtools sffsdump --flash 0x340000,0x160000,0x8000,0x200 \
    --offset 1024 flash.bin dumpdir

Logical bin

Logical bin is rare used.

For example:

dtools sffsdump --blocksize 500 logical.bin dumpdir

The block size is logic block size on flash.