reflect: unexport FFICallbackGo; use go:linkname instead

    
    The function was always intended to be internal-only, but was exported
    so that C code could call it. Now that have go:linkname for that, use it.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/195857

From-SVN: r275809

1 files changed, 6 insertions, 5 deletions

diff --git a/libgo/go/reflect/makefunc_ffi.go b/libgo/go/reflect/makefunc_ffi.go
index 4564736bc99..88ffca56ca0 100644
--- a/libgo/go/reflect/makefunc_ffi.go
+++ b/libgo/go/reflect/makefunc_ffi.go
@@ -15,19 +15,20 @@ func makeFuncFFI(cif unsafe.Pointer, impl unsafe.Pointer)
 // The makeCIF function, implemented in the runtime package, allocates a CIF.
 func makeCIF(ft *funcType) unsafe.Pointer
 
-// FFICallbackGo implements the Go side of the libffi callback.
-// It is exported so that C code can call it.
+// Export ffiCallbackGo so that C code in makefunc_ffi_c.c can call it.
+//go:linkname ffiCallbackGo
+
+// ffiCallbackGo implements the Go side of the libffi callback.
 //
 // The call chain arriving here looks like
 //   some_go_caller
 //   ->some_ffi_internals
 //     ->ffi_callback (in C)
-//       ->FFICallbackGo
+//       ->ffiCallbackGo
 //
 // The ffi_callback handles __go_makefunc_can_recover, and
 // then passes off the data as received from ffi here.
-
-func FFICallbackGo(results unsafe.Pointer, params unsafe.Pointer, impl *makeFuncImpl) {
+func ffiCallbackGo(results unsafe.Pointer, params unsafe.Pointer, impl *makeFuncImpl) {
 	ftyp := impl.typ
 	in := make([]Value, 0, len(ftyp.in))
 	ap := params