| 1 |
148 |
jeremybenn |
/* Communicate dynamic linker state to the debugger at runtime.
|
| 2 |
|
|
Copyright (C) 1996, 1998, 2000 Free Software Foundation, Inc.
|
| 3 |
|
|
This file is part of the GNU C Library.
|
| 4 |
|
|
|
| 5 |
|
|
The GNU C Library is free software; you can redistribute it and/or
|
| 6 |
|
|
modify it under the terms of the GNU Lesser General Public
|
| 7 |
|
|
License as published by the Free Software Foundation; either
|
| 8 |
|
|
version 2.1 of the License, or (at your option) any later version.
|
| 9 |
|
|
|
| 10 |
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
| 11 |
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 12 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
| 13 |
|
|
Lesser General Public License for more details.
|
| 14 |
|
|
|
| 15 |
|
|
You should have received a copy of the GNU Lesser General Public
|
| 16 |
|
|
License along with the GNU C Library; if not, write to the Free
|
| 17 |
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
| 18 |
|
|
02111-1307 USA. */
|
| 19 |
|
|
|
| 20 |
|
|
#include <ldsodefs.h>
|
| 21 |
|
|
|
| 22 |
|
|
/* This structure communicates dl state to the debugger. The debugger
|
| 23 |
|
|
normally finds it via the DT_DEBUG entry in the dynamic section, but in
|
| 24 |
|
|
a statically-linked program there is no dynamic section for the debugger
|
| 25 |
|
|
to examine and it looks for this particular symbol name. */
|
| 26 |
|
|
struct r_debug _r_debug;
|
| 27 |
|
|
|
| 28 |
|
|
|
| 29 |
|
|
/* Initialize _r_debug if it has not already been done. The argument is
|
| 30 |
|
|
the run-time load address of the dynamic linker, to be put in
|
| 31 |
|
|
_r_debug.r_ldbase. Returns the address of _r_debug. */
|
| 32 |
|
|
|
| 33 |
|
|
struct r_debug *
|
| 34 |
|
|
internal_function
|
| 35 |
|
|
_dl_debug_initialize (ElfW(Addr) ldbase)
|
| 36 |
|
|
{
|
| 37 |
|
|
if (_r_debug.r_brk == 0)
|
| 38 |
|
|
{
|
| 39 |
|
|
/* Tell the debugger where to find the map of loaded objects. */
|
| 40 |
|
|
_r_debug.r_version = 1 /* R_DEBUG_VERSION XXX */;
|
| 41 |
|
|
_r_debug.r_ldbase = ldbase;
|
| 42 |
|
|
_r_debug.r_map = _dl_loaded;
|
| 43 |
|
|
_r_debug.r_brk = (ElfW(Addr)) &_dl_debug_state;
|
| 44 |
|
|
}
|
| 45 |
|
|
|
| 46 |
|
|
return &_r_debug;
|
| 47 |
|
|
}
|
| 48 |
|
|
|
| 49 |
|
|
|
| 50 |
|
|
/* This function exists solely to have a breakpoint set on it by the
|
| 51 |
|
|
debugger. The debugger is supposed to find this function's address by
|
| 52 |
|
|
examining the r_brk member of struct r_debug, but GDB 4.15 in fact looks
|
| 53 |
|
|
for this particular symbol name in the PT_INTERP file. */
|
| 54 |
|
|
void
|
| 55 |
|
|
_dl_debug_state (void)
|
| 56 |
|
|
{
|
| 57 |
|
|
}
|
