Re: Breakpoint on first instruction in program

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