From: Kai Tietz <ktietz@redhat.com>
Date: Sun, 10 Nov 2013 11:52:54 +0000 (+0100)
Subject: Back-merged from trunk
X-Git-Tag: releases/gcc-4.7.4~406
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f063c8cc2cf02bd42734adc516fae1e734fcc60e;p=thirdparty%2Fgcc.git

Back-merged from trunk

	Back-merged from trunk
	* config/i386/cygming-crtbegin.c (__gcc_register_frame):
	Increment load-count on use of LIBGCC_SONAME DLL.
	(hmod_libgcc): New static variable to hold handle of
	LIBGCC_SONAME DLL.
	(__gcc_deregister_frame): Decrement load-count of
	LIBGCC_SONAME DLL.

From-SVN: r204637
---

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index dc4fa739d607..53f32383f63d 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,13 @@
+2013-11-10  Kai Tietz  <ktietz@redhat.com>
+
+	Back-merged from trunk
+	* config/i386/cygming-crtbegin.c (__gcc_register_frame):
+	Increment load-count on use of LIBGCC_SONAME DLL.
+	(hmod_libgcc): New static variable to hold handle of
+	LIBGCC_SONAME DLL.
+	(__gcc_deregister_frame): Decrement load-count of
+	LIBGCC_SONAME DLL.
+
 2013-11-07  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/32/sfp-machine.c (FP_HANDLE_EXCEPTIONS): Handle
diff --git a/libgcc/config/i386/cygming-crtbegin.c b/libgcc/config/i386/cygming-crtbegin.c
index b589841fd01b..322b61780084 100644
--- a/libgcc/config/i386/cygming-crtbegin.c
+++ b/libgcc/config/i386/cygming-crtbegin.c
@@ -1,5 +1,5 @@
 /* crtbegin object for windows32 targets.
-   Copyright (C) 2007, 2009, 2010, 2011  Free Software Foundation, Inc.
+   Copyright (C) 2007, 2009-2011, 2013  Free Software Foundation, Inc.
 
    Contributed by Danny Smith <dannysmith@users.sourceforge.net>
 
@@ -69,6 +69,9 @@ static EH_FRAME_SECTION_CONST char __EH_FRAME_BEGIN__[]
   = { };
 
 static struct object obj;
+
+/* Handle of libgcc's DLL reference.  */
+HANDLE hmod_libgcc;
 #endif
 
 #if TARGET_USE_JCR_SECTION
@@ -93,9 +96,14 @@ __gcc_register_frame (void)
 
   void (*register_frame_fn) (const void *, struct object *);
   HANDLE h = GetModuleHandle (LIBGCC_SONAME);
+
   if (h)
-    register_frame_fn = (void (*) (const void *, struct object *))
-			GetProcAddress (h, "__register_frame_info");
+    {
+      /* Increasing the load-count of LIBGCC_SONAME DLL.  */
+      hmod_libgcc = LoadLibrary (LIBGCC_SONAME);
+      register_frame_fn = (void (*) (const void *, struct object *))
+			  GetProcAddress (h, "__register_frame_info");
+    }
   else 
     register_frame_fn = __register_frame_info;
   if (register_frame_fn)
@@ -132,5 +140,7 @@ __gcc_deregister_frame (void)
     deregister_frame_fn = __deregister_frame_info;
   if (deregister_frame_fn)
      deregister_frame_fn (__EH_FRAME_BEGIN__);
+  if (hmod_libgcc)
+    FreeLibrary (hmod_libgcc);
 #endif
 }