Prepare for radical source tree reorganization.zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 43 insertions, 0 deletions

diff --git a/REORG.TODO/elf/soinit.c b/REORG.TODO/elf/soinit.c
new file mode 100644
index 0000000000..fe9935732b
--- /dev/null
+++ b/REORG.TODO/elf/soinit.c
@@ -0,0 +1,43 @@
+/* Initializer module for building the ELF shared C library.  This file and
+   sofini.c do the work normally done by crtbeginS.o and crtendS.o, to wrap
+   the `.ctors' and `.dtors' sections so the lists are terminated, and
+   calling those lists of functions.  */
+
+#ifndef NO_CTORS_DTORS_SECTIONS
+# include <stdlib.h>
+
+static void (*const __CTOR_LIST__[1]) (void)
+  __attribute__ ((used, section (".ctors")))
+  = { (void (*) (void)) -1 };
+static void (*const __DTOR_LIST__[1]) (void)
+  __attribute__ ((used, section (".dtors")))
+  = { (void (*) (void)) -1 };
+
+static inline void
+run_hooks (void (*const list[]) (void))
+{
+  while (*++list)
+    (**list) ();
+}
+
+/* This function will be called from _init in init-first.c.  */
+void
+__libc_global_ctors (void)
+{
+  /* Call constructor functions.  */
+  run_hooks (__CTOR_LIST__);
+}
+
+
+/* This function becomes the DT_FINI termination function
+   for the C library.  */
+void
+__libc_fini (void)
+{
+  /* Call destructor functions.  */
+  run_hooks (__DTOR_LIST__);
+}
+
+void (*_fini_ptr) (void) __attribute__ ((section (".fini_array")))
+     = &__libc_fini;
+#endif