[llvm-dev] Extending llvm-objcopy to support Mach-O

Jake Ehrlich via llvm-dev
Mon, 01 Oct 2018 23:27:24 -0000

This organization is what I've had in mind for a while. I'd like to see
a
good proposal for how to reorganize HandleArgs to work for different
architectures so that CopyConfig and friends can be shared across different
fipe formats. That can be worked out in review though.

I'm in full support.

On Mon, Oct 1, 2018, 4:11 PM Alexander Shaposhnikov <
alexander.v.shaposhnikov at gmail.com> wrote:

> Hey everyone! Objcopy is a powerful tool that allows one to modify object
> files in various manners, for example, modify symbols / symbol tables or
> copy / remove particular parts of a binary. It also serves as a basis for
> the strip tool.
> Currently, llvm-objcopy only supports ELF files while binutils' objcopy
> can handle Mach-O files as well. Besides extending the existing tool to
> support Mach-O binaries this would enable us to build LLVM-based
> replacements for cctools' install_name_tool (for changing rpath(s),
> identification name etc) and lipo / libtool (for manipulating
"fat"
> binaries) similarly to how llvm-strip was implemented on top of
> llvm-objcopy. Regarding the code organization, probably, in this case we
> will have separate folders: ELF, MachO and maybe a few top-level files
> (ObjcopyOpts.td, StripOpts.td). Any thoughts, concerns, or strong
> preferences ? Kind regards, Alex
>
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