Creates an instance of struct UNWIND_INFO: http://msdn.microsoft.com/en-US/library/ddssxxy8(v=vs.80).aspx
The .pdata section is used on Win64 by the VS debugger and dbghelp to get information to walk the stack and unwind exceptions. Absent it, it is assumed to be a "leaf function" where RSP is the return address. Creates an instance of struct RUNTIME_FUNCTION: http://msdn.microsoft.com/en-US/library/ft9x1kdx(v=vs.80).aspx
Unwind data symbol goes in the .xdata section. Input: sf function to generate unwind data for
Compiler implementation of the D programming language.