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Re: [PATCH/RFC] gag some compiler warnings
Mark Kettenis writes:
> Elena Zannoni <ezannoni@redhat.com> writes:
>
> > I am seeing these on a 64 bit system, when building gdb in 32-bit mode:
> >
> > /home/cygnus/ezannoni/gdb-6/src/gdb/infptrace.c: In function `child_xfer_memory':
> > /home/cygnus/ezannoni/gdb-6/src/gdb/infptrace.c:570: warning: cast to pointer from integer of different size
> >
> > The problem is that we pass a CORE_ADDR (which is 8 bytes long) to
> > ptrace and we cast it to PTRACE_ARG3_TYPE (which is 4 bytes long).
> >
> > Is this ok? Not too pretty, I know.
> > * infptrace.c (child_xfer_memory): Cast ptrace argument to long,
> > for cases in which CORE_ADDR size and pointer size don't agree.
>
> Hmm. I don't think this is OK. This could easily hide genuine
> problems. What system is this? Or perhaps a better question: what is
> the prototype of ptrace() in 32-bit mode on this system, and what is
> your definition of PTRACE_ARG3_TYPE on this system?
>
> Mark
This is a ppc64 system. But I think I have some local screw ups in the
way the machine is set up. PTRACE_ARG3_TYPE is void * (4 bytes) from
config/powerpc/nm-ppc64-linux.h while CORE_ADDR is 8 bytes.
Ignore this patch until I figure out what is really going on.
elena