Hi
Im currently trying to add functions to a program which i dont have source code off, and cant be disassembled perfectly to be changed and reassembled.
The thing is, for my asm code im partly using code caves or NOPing unused procedures. Problem here is i have to make new calls/jmp or switch old one to new locations.

I know normally a call to label is resolved by the assembler on assembling, so the offset from the call address to the label is put in hexcode.
But as here i dont assemble, i have to calculate the offsets by hand, and that is not good for many calls, considering with jmping backwards i have to think in signed offsets etc
So if someone knows a tool where you can enter the call and destination address, and it gives you the offset, please tell me

becomes: works for 16, 32 and 64 bit code.