[lldb-dev] CFA with no frame pointer

[Justin Hibbits]

Hi,

I'm working on the port of LLDB for PowerPC, and running into a small
snag.  The CFA-based unwind code seems to require a frame pointer.  The
frame address on PowerPC is stored in *r1, and a frame pointer is
completely optional.  What would be the best way to unwind, in an ABI
plugin, without a frame pointer?  I've thought about creating a fake
register, and implementing it in the elf-core handler, but not sure if
that's the best way to go.

Thanks,
Justin