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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 = ldbase;
_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)
{
}
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