Re: [Question] Is there a way to specify an offset to the loaded symbols?

On Thu Oct 29, 2020 at 2:29 PM CET, Christian Biesinger wrote:
> On Thu, Oct 29, 2020 at 9:23 AM Marten Ringwelski <[email protected]>
> wrote:
> >
> > Hello,
> > for some reason that is not important here I need to debug a binary that is executed by calling the linker manually.
> > In my case I do `/lib/ld-musl-x86_64.so.1 binary`.
> > The problem with this is that gdb now obviously thinks that I want to debug `/lib/ld-musl-x86_64.so.1`. This is not the case.
> > Loading the symbols from `binary` does not help since the the linker loads the process into memory and the jumps to its main.
> >
> > In other words I have the symbols for the binary to be debugged but the binary is loaded into memory with an offset so the symbols are offseted.
> > Is there any way to get this working?
>
> add-symbol-file lets you specify an address but maybe it's easier if
> you just use patchelf --set-interpreter to make it use
> /lib/ld-musl-x86_64.so.1

Thank you, that was easier than expected!