How to create an uninitialized variable in Ghidra?

Question

The code under inspection is a native Android library used in an Android application. The decompiler is showing me a lot of lines in the style DAT_12345678 = 0x12345678 with ascending addresses. I know that this is the initialization of an uninitialized array.

When I want to set the data type, I get the error message Address not found in program memory..

I guess I have to create a memory block first, but in the Memory Map window I do not see an option to add blocks.

How can I fix that? Thanks.

Answer 1

You can add an uninitialized block of memory in the Memory Map window. Hit the little green "Add a new block to memory" button.

Change the start address to an area not currently mapped, specify the length of the block you wish to allocate, and select Uninitialized.