Re: Breakpoint on first instruction in program

[Bob Plantz]

On 6/20/2012 1:39 PM, Adam Beneschan wrote:
>   
> > I am using the following assembly language program (doNothingProg.s) for
> > instruction purposes:
> >
> >           .text
> >           .globl  main
> >           .type   main, @function
> > main:
> >           pushq   %rbp        # save caller's frame pointer
> >           movq    %rsp, %rbp  # establish our frame pointer
> >           movl    $0, %eax    # return 0 to caller
> >           movq    %rbp, %rsp  # restore stack pointer
> >           popq    %rbp        # restore caller's frame pointer
> >           ret                 # back to caller
> >
> > I want to set a breakpoint at the first instruction (pushq %rbp) so
> > students can see how the stack frame is created.
> break *&main
>
>                                  -- Adam
Thank you for the response Adam.

Actually, break *main worked for me. (Or just br *main). I'm not in 
Linux right now, but I will double check next time I log in.

I found this by using info gdb and some looking around. As usual, the 
answer is in the documentation, as I often told my students. :-[

--Bob