Re: [PATCH/RFC] gag some compiler warnings

[Elena Zannoni <ezannoni@redhat.com>]

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