Robert Millan <[EMAIL PROTECTED]> writes: > On Fri, Nov 16, 2007 at 11:58:14PM +0100, Christian Franke wrote: >> Building GRUB modules requires ELF support in gas and ld. For platforms >> where ELF is not the native format, ld may support ELF output. If not >> (like on Cywin) some conversion to ELF is necessary. >> >> In general, GNU objcopy allows conversion between object file formats. >> Unfortunately, objcopy (and BFD itself) does not include any support for >> the conversion of relocation formats (even conversion between ELF >> variants do not work). In particular, when converting PE (a COFF >> variant) to ELF, objcopy does not abort but silently produces bad >> PC-relative relocation offsets. In my first Cygwin patch, there is a >> hack to fix this in the GRUB ELF loader. >> >> For specific conversions, fixing this in objcopy itself is easy. But >> there is not much chance that such pragmatic patches will be accepted >> upstream. >> (http://sourceware.org/ml/binutils/2007-10/threads.html#00302) >> >> I have prepared a reduced (~680 LoC) version of objcopy with the PE->ELF >> fix added. To support build on non-ELF platforms, I would suggest to add >> this to the GRUB codebase. It can be later extended for other platforms >> if desired. > > I'm not sure what the GRUB maintainers will think, but I'm not very inclined > to duplicate stuff that binutils already have.
So am I. > How about building binutils with --enable-targets=i386-elf ? Maybe the > Cygwin maintainers would even add it as default. We could also have a > configure check that aborts build when -m elf_i386 is not supported (which > may also be a problem on pure-x86_64 environment!) and prompt user to > rebuild binutils. That would be a nice check to have. -- Marco _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
