jasonmolenda accepted this revision.
jasonmolenda added inline comments.

================
Comment at: source/Plugins/SymbolFile/Breakpad/SymbolFileBreakpad.cpp:418
+  if (name == ".ra")
+    return resolver.ResolveNumber(eRegisterKindGeneric, 
LLDB_REGNUM_GENERIC_PC);
+  return ResolveRegister(resolver, name);
----------------
labath wrote:
> clayborg wrote:
> > LLDB_REGNUM_GENERIC_RA? Do we want the PC here or do we want the link 
> > register?
> It looks a bit weird, but I believe it should be the PC (and I have checked 
> that things unwind correctly this way), because we are specifying value for 
> the PC in the parent frame (which is the same as the return address of the 
> current frame). Or, to put it another way, breakpad uses ".ra" even on 
> platforms which do not have a LLDB_REGNUM_GENERIC_RA register (like x86).
This is fine, fwiw RegisterContextLLDB won't try to use LLDB_REGNUM_GENERIC_RA 
on architectures that don't use a return address register (e.g. lr on arm), so 
using LLDB_REGNUM_GENERIC_PC is correct if we ever need to do this unwind on an 
x86 breakpad file.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D61733/new/

https://reviews.llvm.org/D61733



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