1 files changed, 107 insertions, 0 deletions
diff --git a/lib/csu/i386/c++rt0.c b/lib/csu/i386/c++rt0.c
new file mode 100644
index 0000000..39752d5
--- /dev/null
+++ b/lib/csu/i386/c++rt0.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 1993 Paul Kranenburg
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Paul Kranenburg.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Run-time module for GNU C++ compiled shared libraries.
+ *
+ * The linker constructs the following arrays of pointers to global
+ * constructors and destructors. The first element contains the
+ * number of pointers in each.
+ * The tables are also null-terminated.
+ */
+extern void (*__CTOR_LIST__[])(void);
+extern void (*__DTOR_LIST__[])(void);
+
+static void
+__dtors(void)
+{
+	unsigned long i = (unsigned long) __DTOR_LIST__[0];
+	void (**p)(void) = __DTOR_LIST__ + i;
+
+	while (i--)
+		(**p--)();
+}
+
+static void
+__ctors(void)
+{
+	void (**p)(void) = __CTOR_LIST__ + 1;
+
+	while (*p)
+		(**p++)();
+}
+
+extern void __init() asm(".init");
+extern void __fini() asm(".fini");
+
+void
+__init(void)
+{
+	static int initialized = 0;
+
+	/*
+	 * Call global constructors.
+	 * Arrange to call global destructors at exit.
+	 */
+	if (!initialized) {
+		initialized = 1;
+		__ctors();
+	}
+
+}
+
+void
+__fini(void)
+{
+	__dtors();
+}
+
+/*
+ * Make sure there is at least one constructor and one destructor in the
+ * shared library.  Otherwise, the linker does not realize that the
+ * constructor and destructor lists are linker sets.  It treats them as
+ * commons and resolves them to the lists from the main program.  That
+ * causes multiple invocations of the main program's static constructors
+ * and destructors, which is very bad.
+ */
+
+static void
+do_nothing(void)
+{
+}
+
+/* Linker magic to add an element to a constructor or destructor list. */
+#define TEXT_SET(set, sym) \
+	asm(".stabs \"_" #set "\", 23, 0, 0, _" #sym)
+
+TEXT_SET(__CTOR_LIST__, do_nothing);
+TEXT_SET(__DTOR_LIST__, do_nothing);