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17.3 save

Use the save command in order to write a region from an IO space into a file in your file system.

This command has the following synopsis.

save [:ios ios] [:from offset] [:size offset] [:file string]
     [:append bool] [:verbose bool]

All arguments are optional. When invoked with no arguments, save does nothing.

The arguments from and size are used to determine the region of the IO space to save. This is how you would extract and save the contents of an ELF section to a file out.text:

(poke) var s = elf_section_by_name (Elf64_Ehdr @ 0#B, ".text")
(poke) save :file "out.text" :from s.sh_offset :size s.sh_size

Both from and size are arbitrary offsets. You should keep in mind however that files are byte oriented. Therefore saving, say, nine bits to a file will actually write two bytes.

By default save will extract the data from the current IO space. However, it is possible to specify an alternative IOS by using the ios argument.

By default save will truncate the output file, if it exists, before starting writing. If the argument append is set as true, however, it will append to the existing contents of the file. In this case, the file should exist.