glibc/elf/dl-debug.c
Ulrich Drepper 29f976542b Update.
2005-01-09  Ulrich Drepper  <drepper@redhat.com>

	* elf/dl-debug.c (_dl_debug_initialize): Take extra parameter and
	use it to select the r_debug structure for that namespace.
	* elf/dl-close.c (_dl_close): Adjust call to _dl_debug_initialize.
	* elf/dl-load.c (_dl_map_object_from_fd): Likewise.
	* elf/dl-open.c (_dl_open): Likewise.
	* elf/rtld.c (dl_main): Likewise.
	* sysdeps/generic/ldsodefs.h (struct link_namespaces): Add _ns_debug
	member.
	(_dl_debug_initialize): Add new parameter in declaration.

	* elf/dl-close.c (_dl_close): Make sure auditing callbacks are not
	called for the auditing objects themselves.
	* elf/dl-load.c (_dl_map_object_from_fd): Likewise.
2005-01-09 08:29:25 +00:00

66 lines
2.3 KiB
C

/* Communicate dynamic linker state to the debugger at runtime.
Copyright (C) 1996, 1998,2000,2002,2004,2005 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <ldsodefs.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 *
internal_function
_dl_debug_initialize (ElfW(Addr) ldbase, Lmid_t ns)
{
struct r_debug *r;
if (ns == LM_ID_BASE)
r = &_r_debug;
else
r = &GL(dl_ns)[ns]._ns_debug;
if (r->r_brk == 0 || ldbase != 0)
{
/* Tell the debugger where to find the map of loaded objects. */
r->r_version = 1 /* R_DEBUG_VERSION XXX */;
r->r_ldbase = ldbase ?: _r_debug.r_ldbase;
r->r_map = GL(dl_ns)[ns]._ns_loaded;
r->r_brk = (ElfW(Addr)) &_dl_debug_state;
}
return r;
}
/* 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)
{
}
rtld_hidden_def (_dl_debug_state)