Disassembly view | CLion Documentation

Right-click the desired frame in the Debug tool window and select Disassemble:
Disassembly view will be opened side-by-side with the source code:
Once opened, the disassembly view stays synchronized with the currently selected frame. When frames are switched, both the editor and the disassembly view scroll to the execution point.
All the debug actions described below are available in this side-by-side view, with an exception that currently CLion does not mirror breakpoints between the source file and the disassembly view.

When debugging your code, use the Force Step Into Alt+Shift+F7 command instead of Step Into F7. Step Into acts like Step Over for functions with no source code.
Disassembly view opens automatically when CLion can’t locate the source files during debugging. This can happen, for example, when you debug a custom executable using a fake CMake project or when there is a library built on CI without the source code being in the project.
To explicitly specify the source, click Select file in the notification:
Navigate to the desired frame in the Debug Tool window.
Disassembly also opens automatically when you launch a debug session for the attached process that does not provide debug information.

While in disassembly view, you can investigate your code using regular stepping actions.

You can also use the Set Execution Point action to jump to an arbitrary line of code in disassembly:

You can set breakpoints in disassembly the same way you do in the source code. These breakpoints are called address breakpoints.

Right-click a breakpoint to view the available options:

Click More or press Control+Shift+F8 to edit address breakpoints in the Breakpoints dialog:

Use the Go to field to jump to a desired code line. In this field, you can enter an address or any expression that can be evaluated into an address.

If you need to include a register into the expression, start its name with $ (the GDB notation).

Syntax highlighting is available for AT&T assembly code.

By default, the .s and .asm files are recognized as assembly code files, but you can configure other types:

Go to Settings | Editor | File Types.
Select Assembly Language in the list of recognized file types and add a new extension to the list.