1 files changed, 56 insertions, 0 deletions
diff --git a/elf/dl-debug.c b/elf/dl-debug.c
new file mode 100644
index 0000000000..861e0019e8
--- /dev/null
+++ b/elf/dl-debug.c
@@ -0,0 +1,56 @@
+/* Communicate dynamic linker state to the debugger at runtime.
+Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <link.h>
+
+/* This structure communicates dl state to the debugger.  The debugger
+   normally finds it via the DT_DEBUG entry in the dynamic section, but in
+   a statically-linked program there is no dynamic section for the debugger
+   to examine and it looks for this particular symbol name.  */
+struct r_debug _r_debug;
+
+
+/* Initialize _r_debug if it has not already been done.  The argument is
+   the run-time load address of the dynamic linker, to be put in
+   _r_debug.r_ldbase.  Returns the address of _r_debug.  */
+
+struct r_debug *
+_dl_debug_initialize (ElfW(Addr) ldbase)
+{
+  if (_r_debug.r_brk == 0)
+    {
+      /* Tell the debugger where to find the map of loaded objects.  */
+      _r_debug.r_version = 1	/* R_DEBUG_VERSION XXX */;
+      _r_debug.r_ldbase = _dl_rtld_map.l_addr; /* Record our load address.  */
+      _r_debug.r_map = _dl_loaded;
+      _r_debug.r_brk = (ElfW(Addr)) &_dl_debug_state;
+    }
+
+  return &_r_debug;
+}
+
+
+/* This function exists solely to have a breakpoint set on it by the
+   debugger.  The debugger is supposed to find this function's address by
+   examining the r_brk member of struct r_debug, but GDB 4.15 in fact looks
+   for this particular symbol name in the PT_INTERP file.  */
+void
+_dl_debug_state (void)
+{
+}