1 files changed, 63 insertions, 0 deletions
diff --git a/src/dl/dlsym_reserved.go b/src/dl/dlsym_reserved.go
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+++ b/src/dl/dlsym_reserved.go
@@ -0,0 +1,63 @@
+// The documentation for RTLD_DEFAULT and RTLD_NEXT is taken from the
+// Linux Programmer's Manual page for dlsym(3).
+//
+// Copyright 1995 Yggdrasil Computing, Incorporated.
+// Copyright 2003, 2015 Michael Kerrisk <mtk.manpages@gmail.com>.
+// Copyright 2015 Luke Shumaker <lukeshu@sbcglobal.net>.
+//
+// This is free documentation; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of
+// the License, or (at your option) any later version.
+//
+// The GNU General Public License's references to "object code"
+// and "executables" are to be interpreted as the output of any
+// document formatting or typesetting system, including
+// intermediate and printed output.
+//
+// This manual is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public
+// License along with this manual; if not, see
+// <http://www.gnu.org/licenses/>.
+
+package dl
+
+import "unsafe"
+
+//#define _GNU_SOURCE
+//#include <stdint.h>
+//#include <dlfcn.h>
+//const uintptr_t rtld_next = (uintptr_t)RTLD_NEXT;
+//const uintptr_t rtld_default = (uintptr_t)RTLD_DEFAULT;
+import "C"
+
+// These constant values for Handles are reserved by POSIX for future
+// use with these meanings.  They are available in GNU libdl if
+// _GNU_SOURCE is defined.
+var (
+	// This Handle represents the default default shared object
+	// search order.  The search will include global symbols in
+	// the executable and its dependencies, as well as symbols in
+	// shared objects that were dynamically loaded with the
+	// RTLD_GLOBAL flag.
+	RTLD_DEFAULT Handle
+
+	// This Handle represents the shared object search order after
+	// the current object.  This allows one to provide a wrapper
+	// around a function in another shared object, so that, for
+	// example, the definition of a function in a preloaded shared
+	// object (see LD_PRELOAD in ld.so(8)) can find and invoke the
+	// "real" function provided in another shared object (or for
+	// that matter, the "next" definition of the function in cases
+	// where there are multiple layers of preloading).
+	RTLD_NEXT Handle
+)
+
+func init() {
+	RTLD_DEFAULT = Handle{c: unsafe.Pointer(uintptr(C.rtld_default)), o: 2}
+	RTLD_DEFAULT = Handle{c: unsafe.Pointer(uintptr(C.rtld_next)), o: 2}
+}