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| -rw-r--r-- | crates/nasm/README.md | 23 |
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diff --git a/crates/nasm/README.md b/crates/nasm/README.md index d61c84e..355b28b 100644 --- a/crates/nasm/README.md +++ b/crates/nasm/README.md @@ -246,6 +246,29 @@ fit in a byte. Hence, you could have a code like follows: If you compile the code with `-D PAL=1`, then the first branch will be taken instead of the second one. +### Unused code + +This assembler will also issue a warning whenever it finds unreferenced +variables or labels. Hence, if you have something like: + +```asm +foo: + rts + +;; code that never references 'foo'. +``` + +Then you will get: + +``` +warning: raw address 'foo' is unused (unused.s) +``` + +In the case for subroutines defined via `.proc`, this warning will actually be +an error, as `nasm` can rightly identify that this is dead code. + +This check can be skipped by providing the `--allow-unused` flag on nasm. + ## Address sanitizer This assembler comes with a set of tools that builds up an "address |