Convert large amount of code to data in IDA

Question

Well, Unfortunately I hit 'C' on a data section of a binary i had worked a lot on and saved it as i had a lot of work unsaved. I tried converting this huge section back to data but whenever i select lines and press 'D', only the line where the cursor was gets converted to data.

So, My question is, How do i mark/convert a large amount of data to code in IDA (specifically 6.1)

(The target architecture is ARM if that matters).

Answer 1

D is to define a single data. You can go to the first instruction and use U for Undefine. It will remove more code than "Convert to data".

Answer 2

You could do it with a quick IDAPython script, e.g. enter:

for a in xrange(startaddr, endaddr): MakeCode(a)

into the 'Python' field of the Output window.