[wip:binutils] Large corefile support
Sat Jan 17 15:07:00 GMT 2004
> Andrew Cagney <email@example.com> writes:
>> - is requires --enable-64-bit-bfd
>> A 32-bit BFD has a 32-bit signed file_ptr (limiting SEEK_SET to files
>> up to 2gb). I think the only robust way of handling files larger than
>> that 2gb is to require a 64-bit file_ptr (and hence
> It seems to me that we should try to avoid confusing whether the
> target is 64-bits with the size of a file pointer on the host.
I suspect "try" is the operative word :-)
> Admittedly the issue is confused now, because file_ptr is typedefed to
> be bfd_signed_vma. But we don't need to perpetuate the confusion. I
> think we should define file_ptr to be off_t or off64_t, and then
> consistently use ftello or ftello64 and friends if they are available.
So always use 64-bit file I/O when available?
Note that because off64_t can be conditionally compiled file_ptr will be
need to be defined using the underlying type. Otherwize it will make a
mess of BFD's "bfd.h" file.
Hmm, makes me also wonder if, in a second pass, a rename of file_ptr to
a more name space proof bfd_offset (better?) is required.
> So I guess I would like to see a bit more to your patch--change the
> definition of file_ptr, too. Despite the comment, we know how to set
> the type based on host definitions tested by autoconf--see, e.g., the
> handling of BFD_HOST_64_BIT.
Hmm, there's AC_COMPILE_CHECK_SIZEOF but I don't see how to convince it
to both #define _GNU_SOURCE and #include <stdio.h>.
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