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-rw-r--r--elf/dl-debug.c56
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diff --git a/elf/dl-debug.c b/elf/dl-debug.c
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+/* 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)
+{
+}