You can run gdb in Text User Interface (TUI) mode:
gdb -tui <your-binary>
(gdb) b main
(gdb) r
(gdb) layout split
The layout split command divides the window into two parts – one of them displaying the source code, the other one the corresponding assembly.
A few others tricks:
- set disassembly-flavor intel – if your prefer intel notation
- set print asm-demangle – demangles C++ names in assembly view
- ni – next instruction
- si – step instruction
If you do not want to use the TUI mode (e.g. your terminal does not like it), you can always do:
x /12i $pc
which means print 12 instructions from current program counter address – this also works with the tricks above (demangling, stepping instructions, etc.).
The “x /12i $pc” trick works in both gdb and cgdb, whereas “layout split” only works in gdb.
Enjoy 🙂