Switching to assembly in gdb

Question

Is there is any way to switch to assembly when debugging a C or C++ program in gdb ? (Given that all source files and their corresponding assembly files are available)

Answer 1

There is a way to disassemble a function or a certain section of code, is that what you are after?

The command to do so would be disassemble <function name> or a memory location.

Is this what you are referring to?

(gdb) help disassemble
Disassemble a specified section of memory.
Default is the function surrounding the pc of the selected frame.
With a single argument, the function surrounding that address is dumped.
Two arguments are taken as a range of memory to dump.

Answer 2

In the new gdb version 7.0, the disassemble command can take a new argument /m which makes it emit mixed source and disassembly.

Answer 3

That question was also asked in cgdb's googlegroup https://groups.google.com/forum/?hl=de&fromgroups=#!topic/cgdb-users/E-jZCJiBAQQ

No answer yet on why layout asm doesnt work though

Edit: They posted recently and told that its a feature that isnt implemented yet. (check the link above)

Answer 4

You can switch to asm layout in gdb:

(gdb) layout asm

See here for more information.

Answer 5

Using the disas command will probably do what you want.

According to the internal help, the disas command does the following:

Disassemble a specified section of memory.
Default is the function surrounding the pc of the selected frame.
With a single argument, the function surrounding that address is dumped.
Two arguments are taken as a range of memory to dump.