1 files changed, 129 insertions, 0 deletions
diff --git a/lib/libc/gen/dlfcn.c b/lib/libc/gen/dlfcn.c
new file mode 100644
index 0000000..e0a8233
--- /dev/null
+++ b/lib/libc/gen/dlfcn.c
@@ -0,0 +1,129 @@
+/*-
+ * Copyright (c) 1998 John D. Polstra
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Linkage to services provided by the dynamic linker.
+ */
+#include <dlfcn.h>
+#include <stddef.h>
+
+static const char sorry[] = "Service unavailable";
+
+/*
+ * For ELF, the dynamic linker directly resolves references to its
+ * services to functions inside the dynamic linker itself.  These
+ * weak-symbol stubs are necessary so that "ld" won't complain about
+ * undefined symbols.  The stubs are executed only when the program is
+ * linked statically, or when a given service isn't implemented in the
+ * dynamic linker.  They must return an error if called, and they must
+ * be weak symbols so that the dynamic linker can override them.
+ */
+
+#pragma weak _rtld_error
+void
+_rtld_error(const char *fmt, ...)
+{
+}
+
+#pragma weak dladdr
+int
+dladdr(const void *addr, Dl_info *dlip)
+{
+	_rtld_error(sorry);
+	return 0;
+}
+
+#pragma weak dlclose
+int
+dlclose(void *handle)
+{
+	_rtld_error(sorry);
+	return -1;
+}
+
+#pragma weak dlerror
+const char *
+dlerror(void)
+{
+	return sorry;
+}
+
+#pragma weak dllockinit
+void
+dllockinit(void *context,
+	   void *(*lock_create)(void *context),
+	   void (*rlock_acquire)(void *lock),
+	   void (*wlock_acquire)(void *lock),
+	   void (*lock_release)(void *lock),
+	   void (*lock_destroy)(void *lock),
+	   void (*context_destroy)(void *context))
+{
+	if (context_destroy != NULL)
+		context_destroy(context);
+}
+
+#pragma weak dlopen
+void *
+dlopen(const char *name, int mode)
+{
+	_rtld_error(sorry);
+	return NULL;
+}
+
+#pragma weak dlsym
+void *
+dlsym(void * __restrict handle, const char * __restrict name)
+{
+	_rtld_error(sorry);
+	return NULL;
+}
+
+#pragma weak dlvsym
+void *
+dlvsym(void * __restrict handle, const char * __restrict name,
+    const char * __restrict version)
+{
+	_rtld_error(sorry);
+	return NULL;
+}
+
+#pragma weak dlinfo
+int
+dlinfo(void * __restrict handle, int request, void * __restrict p)
+{
+	_rtld_error(sorry);
+	return 0;
+}
+
+#pragma weak _rtld_thread_init
+void
+_rtld_thread_init(void * li)
+{
+	_rtld_error(sorry);
+}