Allow specifying a rom-elf (#963)

* Allow specifying a `rom-elf`

* Clippy

* CHANGELOG.md

* Clippy

* Have and use built-in ROM-elfs

Author: bjoernQ

CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- A new CLI argument `rom-elf` was added which will be used for backtraces (#963)
+
 ### Changed
 
 ### Fixed

cargo-espflash/src/main.rs

@@ -413,9 +413,11 @@ fn flash(args: FlashArgs, config: &Config) -> Result<()> {
 
         monitor_args.elf = Some(build_ctx.artifact_path);
 
+        let elfs = vec![elf_data.as_ref()];
+
         monitor(
             flasher.into(),
-            Some(&elf_data),
+            elfs,
             pid,
             monitor_args,
             args.connect_args.non_interactive,