Richard Sandiford writes: add support for init/fini arrays in shared flat libraries

1 files changed, 46 insertions, 0 deletions

diff --git a/libc/misc/internals/shared_flat_add_library.c b/libc/misc/internals/shared_flat_add_library.c
new file mode 100644
index 000000000..f03480f56
--- /dev/null
+++ b/libc/misc/internals/shared_flat_add_library.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2006 CodeSourcery Inc
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ *
+ * This file defines __shared_flat_add_library.  If a library has
+ * initialistion and finalisation code, it should use this routine
+ * to register itself.
+ */
+#include "shared_flat_lib.h"
+
+/* The initialisation and finalisation symbols for this library.  */
+extern void _init(void) attribute_hidden weak_function;
+extern void _fini(void) attribute_hidden weak_function;
+extern void (*__preinit_array_start[])(void) attribute_hidden;
+extern void (*__preinit_array_end[])(void) attribute_hidden;
+extern void (*__init_array_start[])(void) attribute_hidden;
+extern void (*__init_array_end[])(void) attribute_hidden;
+extern void (*__fini_array_start[])(void) attribute_hidden;
+extern void (*__fini_array_end[])(void) attribute_hidden;
+
+/* The shared_flat_lib structure that describes this library.  */
+static struct shared_flat_lib this_lib = {
+	0,
+	0,
+	__preinit_array_start,
+	__preinit_array_end,
+	__init_array_start,
+	__init_array_end,
+	__fini_array_start,
+	__fini_array_end,
+	_init,
+	_fini
+};
+
+/* Add this_lib to the end of the global list. */
+void __shared_flat_add_library(void) attribute_hidden;
+void __shared_flat_add_library(void)
+{
+	this_lib.prev = __last_shared_lib;
+	if (this_lib.prev)
+		this_lib.prev->next = &this_lib;
+	else
+		__first_shared_lib = &this_lib;
+	__last_shared_lib = &this_lib;
+}