Let’s make a very simple example and imagine we have a CPU with only two registers, EAX and EBX. mov ebx, eax Simply copies the value in eax to the ebx register | EAX : 01234567 | —-> | EAX : 01234567 | | EBX : 00000000 | ====> | EBX : 01234567 | Now … Read more
In this case, the $ means the current address according to the assembler. $ – msg is the current address of the assembler minus the address of msg, which would be the length of the string.
There is really no advantage to one over the other. I agree though that Intel syntax is much easier to read. Keep in mind that, AFAIK, all GNU tools have the option to use Intel syntax also. It looks like you can make GDB use Intel syntax with this: set disassembly-flavor intel GCC can do … Read more