Implement investigate kernel corefile to lldb.

update build infrastructure for llvm-16.0.6

Update build infrastructure for LLVM 13.0.0.

Update clang build infrastructure for LLVM 11.1.0.

Heavy lifting by mortimer@, thank you so much!

Shuffle how lldb register contexts are built.

Instead of using #if defined(__arch__) to include / exclude the entire contents
of the NativeRegisterContext implementations, use a single NativeRegiste

Shuffle how lldb register contexts are built.

Instead of using #if defined(__arch__) to include / exclude the entire contents
of the NativeRegisterContext implementations, use a single NativeRegisterContextOpenBSD_arch
which includes the right arch specific register context, and provides a dummy implementation
for unsupported architectures.

This allows building lldb on architectures which do not have a register context implementation
so it can be used as a remote client.

ok patrick@

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Update build infrastructure for LLVM 10.0.0.

ok hackroom@
tested by plenty

Add arm64 support for lldb.

"Go for it" kettenis@

In lldb, use a OpenBSD signal map instead of leveraging the FreeBSD one.

ok kettenis@

Add lldb support for debugging running binaries on amd64.

Follows a similar model as NetBSD. Much help from patrick, kettenis and guenther.
lldb and lldb-server remain not installed by default.

ok

Add lldb support for debugging running binaries on amd64.

Follows a similar model as NetBSD. Much help from patrick, kettenis and guenther.
lldb and lldb-server remain not installed by default.

ok patrick@

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Update clang build infrastructure for LLVM 8.0.0.

Update clang build infrastructure for LLVM 7.0.1.

Add infrastructure to compile and link LLDB. Inspecting core files
works, but actually running stuff probably won't.

ok kettenis@