How does one change an instruction with a hex editor?
问题 I am messing around with some reverse engineering, but I don't know how to change a jnz to jz with a hex editor. I understand it will vary between systems but I'm not sure where to look to find this information. I'm working on Mac OS X 64 bit and I disassembled code with IDA Pro. 回答1: If you've found a jz , it will either look like 74 XX or 0F 84 XX XX XX XX . If it's a 74 , change it to 75 . If it's the one with 84 , change it to 85 . This information can be found, among other places, in