svn commit: r294530 - head/sys/sys

[Ed Maste]

Author: emaste
Date: Thu Jan 21 20:44:21 2016
New Revision: 294530
URL: https://svnweb.freebsd.org/changeset/base/294530

Log:
  Add STB_GNU_UNIQUE symbol binding definition
  
  Red Hat created STB_GNU_UNIQUE to handle certain special cases relating
  to dynamically loading C++ DSOs[1].
  
  We don't (currently) have support for STB_GNU_UNIQUE, but ought to
  reserve the value in ELFNN_ST_BIND. This will also be used by an
  upcoming ELF Tool Chain import.
  
  [1] https://www.redhat.com/archives/posix-c++-wg/2009-August/msg00002.html
  
  MFC after:	1 week
  Sponsored by:	The FreeBSD Foundation

Modified:
  head/sys/sys/elf_common.h

Modified: head/sys/sys/elf_common.h
==============================================================================
--- head/sys/sys/elf_common.h	Thu Jan 21 19:19:24 2016	(r294529)
+++ head/sys/sys/elf_common.h	Thu Jan 21 20:44:21 2016	(r294530)
@@ -753,8 +753,9 @@ typedef struct {
 #define	STB_LOCAL	0	/* Local symbol */
 #define	STB_GLOBAL	1	/* Global symbol */
 #define	STB_WEAK	2	/* like global - lower precedence */
-#define	STB_LOOS	10	/* Reserved range for operating system */
-#define	STB_HIOS	12	/*   specific semantics. */
+#define	STB_LOOS	10	/* Start of operating system reserved range. */
+#define	STB_GNU_UNIQUE	10	/* Unique symbol (GNU) */
+#define	STB_HIOS	12	/* End of operating system reserved range. */
 #define	STB_LOPROC	13	/* reserved range for processor */
 #define	STB_HIPROC	15	/*   specific semantics. */