chmeee added a comment. In https://reviews.llvm.org/D41702#972009, @labath wrote:
> In https://reviews.llvm.org/D41702#971076, @jhibbits wrote: > > > > @emaste, @jhibbits: do you know what's the state of ppc64 lldb support in > > > freebsd? > > > > It's broken because LLDB doesn't yet handle function descriptors, and I > > haven't yet made the effort (ENOTIME) to fix that. I think our eventual > > goal is to move even BE to ELFv2 on FreeBSD, to do away with function > > descriptors, and it should then Just Work, as powerpc (32-bit) works fine > > for most cases right now. > > > > That said, if anyone knows enough to add function descriptor knowledge to > > LLDB, I think that's the only missing piece, or the biggest missing piece. > > I do want to finish the effort, since I started it 3.5 years ago, but I do > > need help with understanding that ABI detail and how it fits with LLDB. > > > Thanks for the explanation. How badly is it broken would you say? Do you > think that using this ABI plugin for the big endian target (instead of the > one from 2014) would make things any worse? Could you take a quick look to > see if there is anything in this plugin that would be completely wrong for > the big endian target ? (I couldn't find anything, apart from the obvious > things like register constants in `CreateDefaultUnwindPlan`, but then again, > I don't know the ABIs). > > I'm trying to avoid making bad design decisions now because of legacy code > that is known to be broken and has no clear maintainer nor a plan to fix it. I don't see anything glaring. I also cross-referenced with the 64-bit BE ABI reference (http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi.html) and didn't see anything obvious that would hinder using your plugin as a replacement to mine (as mentioned before, symbol handling is the big problem right now, and that's not handled within the ABI plugin), if yours is fully tested. https://reviews.llvm.org/D41702 _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
