What does the dollar sign ($) mean in x86 assembly when calculating string lengths like "$ - label"?

Question

(This question already has an answer here): question from:https://stackoverflow.com/questions/10361231/what-does-the-dollar-sign-mean-in-x86-assembly-when-calculating-string-lengt

Answer 1

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.