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Re: Debug code in data section in gdb
- From: mec dot gnu at mindspring dot com (Michael Elizabeth Chastain)
- To: mec dot gnu at mindspring dot com, zhangtao at cc dot gatech dot edu
- Cc: gdb at sources dot redhat dot com
- Date: Tue, 22 Jun 2004 19:17:35 -0400 (EDT)
- Subject: Re: Debug code in data section in gdb
> I can break the program just before the execution jump to the
> code copied from somewhere. Then I set a breakpoint at the beginning of
> the copied code. It still won't work.
That's the right thing to do. It should work.
> Another thing is I see the code is same as the original code. My
> question is whether I can see the GDB modified instruction by
> disassemble the memory ? When and How gdb modifies the instruction?
gdb goes to some lengths to report the original contents of memory
no matter how you examine it.
> I suspect this problem is specific to my port of gdb, so maybe I need to
> understand how breakpoints work in gdb to understand my problem. Could
> anybody give me some pointers to articles or online books on debugger or
> gdb?
Mmmm, start with the gdb internals manual (doc/gdbint.texinfo).
Again, it would help a lot if you could use the 'script' command to
capture an entire gdb session, and then mail in the 'typescript' file.
Michael C