On 06/21/2012 03:46 AM, Iurie wrote:

Hi Bob,
what course u are teaching out there? give me the link to it, perhaps i will learn there something useful as i am also a student. 

I retired from teaching in 2004, but I keep my book, Introduction to Computer Architecture, updated. It is available on my web site: bob.cs.sonoma.edu

I checked info gdb. Under Source->Specify Location I found an entry for `*ADDRESS'. Apparently, the *ADDRESS form is for C, C++, Java, Objective-C, Fortran, minimal, and assembly. The *&ADDRESS' form is for Pascal and Modula-2. However, it seems that gdb is forgiving between these two forms. And, from my personal experience, this can differ between versions and can change over time.

--Bob

On 21 June 2012 05:09, Bob Plantz <plantz <at> ieee.org> wrote:

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, <at> 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