Edit (patch) a binary file in IDA Pro

Question

i would like to know how to edit a binary file in ida pro (i just need to change one instruction!)

(its ARM binary)

thanks

Answer 1

1. select the instruction you need to change in "IDA View" subview.

2. switch to "Hex View" subview. You will see several highlighting hex numbers.

3. press "F2", edit it, when you finish, press "F2" again.

4. That's all. you will see your change in other subviews.

Answer 2

I think IDA used to have a feature to do that, but it's not present in the current versions.

You should just use a hex editor. Note the file offset in IDA and edit the file at that address. If you'd like to see the changes in IDA, use the "File" -> "Load file" -> "Reload the input file" menu item.

Answer 3

First do as Lundman suggested, then choose File / Produce / DIF file.

Then apply the diff file using an external tool

Answer 4

Possibly edit:

idagui.cfg: DISPLAY_PATCH_SUBMENU = YES

If the menu is not enabled, then use

Edit/Patch code/Change Byte

Answer 5

IDA 6.2 has the "Edit" -> "Patch program" menu enabled out of the box. No need to modify idagui.cfg. There is also an "Apply patches to input file" option that that will modify the target file.