Move the alias definition of unw_getcontext to within !defined(__USING_SJLJ_EXCEPTIONS__)

For builds with SJLJ, there is no __unw_getcontext symbol. On Windows,
the weak alias macro also expands to a dllexport directive, which fails
if the symbol doesn't exist.

Differential Revision: https://reviews.llvm.org/D60251

llvm-svn: 357711

diff --git a/libunwind/src/UnwindRegistersSave.S b/libunwind/src/UnwindRegistersSave.S
index 7db023c..c2983e7 100644 (file)
--- a/libunwind/src/UnwindRegistersSave.S
+++ b/libunwind/src/UnwindRegistersSave.S
@@ -972,8 +972,9 @@ DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
   jmp %o7
    clr %o0                   // return UNW_ESUCCESS
 #endif
-#endif /* !defined(__USING_SJLJ_EXCEPTIONS__) */
 
   WEAK_ALIAS(__unw_getcontext, unw_getcontext)
 
+#endif /* !defined(__USING_SJLJ_EXCEPTIONS__) */
+
 NO_EXEC_STACK_DIRECTIVE