[flashrom] Copy / backup ENTIRE flash chip; does "-r" already do this?

[Rafael Send]

Hi there-
I'm looking at swapping out the physical flash chip on my machine for a
larger capacity one, so I wanted to get a quick sanity check:

Does a flashrom -r pick up all the various regions in the chip, or does it
only go after the BIOS region if I don't specify a layout file?

I.e if I do a flashrom -r on the old chip then flashrom -w on the new one,
will I get an identical copy of the entire thing?

Thanks and apologies if this can be found in the documentation, please feel
free to point me there instead.

Rafael