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/* vi: set sw=4 ts=4: */
/* common debug code for ELF shared library loader
*
* Copyright (c) 1994-2000 Eric Youngdale, Peter MacDonald,
* David Engel, Hongjiu Lu and Mitch D'Souza
* Copyright (C) 2001-2004 Erik Andersen
* Copyright (C) 2002-2004, Axis Communications AB
* Copyright (C) 2003, 2004 Red Hat, Inc.
* Copyright (C) 2002, Steven J. Hill (sjhill@realitydiluted.com)
* Copyright (C) 2001-2002 David A. Schleef
* Copyright (C) 2004 Joakim Tjernlund
* Copyright (C) 2002, Stefan Allius <allius@atecom.com> and
* Eddie C. Dost <ecd@atecom.com>
* Copyright (C) 2003, 2004, 2005 Paul Mundt <lethal@linux-sh.org>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. The name of the above contributors may not be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "ldso.h"
#if defined (__SUPPORT_LD_DEBUG__)
/* include the arch-specific _dl_reltypes_tab */
#include "dl-debug.h"
static const char *_dl_reltypes(int type)
{
static char buf[50];
const char *str;
int tabsize;
tabsize = (int)(sizeof(_dl_reltypes_tab) / sizeof(_dl_reltypes_tab[0]));
if (type >= tabsize || (str = _dl_reltypes_tab[type]) == NULL)
str = _dl_simple_ltoa(buf, (unsigned long)type);
return str;
}
static void debug_sym(ElfW(Sym) *symtab, char *strtab, int symtab_index)
{
if (!_dl_debug_symbols || !symtab_index)
return;
_dl_dprintf(_dl_debug_file,
"\n%s\n\tvalue=%x\tsize=%x\tinfo=%x\tother=%x\tshndx=%x",
strtab + symtab[symtab_index].st_name,
symtab[symtab_index].st_value,
symtab[symtab_index].st_size,
symtab[symtab_index].st_info,
symtab[symtab_index].st_other,
symtab[symtab_index].st_shndx);
}
static void debug_reloc(ElfW(Sym) *symtab, char *strtab, ELF_RELOC *rpnt)
{
if (!_dl_debug_reloc)
return;
if (_dl_debug_symbols) {
_dl_dprintf(_dl_debug_file, "\n\t");
} else {
int symtab_index;
const char *sym;
symtab_index = ELF_R_SYM(rpnt->r_info);
sym = symtab_index ? strtab + symtab[symtab_index].st_name : "sym=0x0";
_dl_dprintf(_dl_debug_file, "\n%s\n\t", sym);
}
_dl_dprintf(_dl_debug_file, "%s\toffset=%x",
_dl_reltypes(ELF_R_TYPE(rpnt->r_info)),
rpnt->r_offset);
#ifdef ELF_USES_RELOCA
_dl_dprintf(_dl_debug_file, "\taddend=%x", rpnt->r_addend);
#endif
_dl_dprintf(_dl_debug_file, "\n");
}
#else
#define debug_sym(symtab, strtab, symtab_index)
#define debug_reloc(symtab, strtab, rpnt)
#endif /* __SUPPORT_LD_DEBUG__ */
#ifdef __LDSO_PRELINK_SUPPORT__
static void
internal_function
_dl_debug_lookup (const char *undef_name, struct elf_resolve *undef_map,
const ElfW(Sym) *ref, struct symbol_ref *value, int type_class)
{
#ifdef SHARED
if (_dl_trace_prelink)
{
int conflict = 0;
struct symbol_ref val = { ref, NULL };
if ((_dl_trace_prelink_map == NULL
|| _dl_trace_prelink_map == _dl_loaded_modules)
&& undef_map != _dl_loaded_modules)
{
_dl_find_hash(undef_name, &undef_map->symbol_scope,
undef_map, type_class, &val);
if (val.sym != value->sym || val.tpnt != value->tpnt)
conflict = 1;
}
if (unlikely(value->sym && ELF_ST_TYPE(value->sym->st_info) == STT_TLS))
type_class = 4;
if (conflict
|| _dl_trace_prelink_map == undef_map
|| _dl_trace_prelink_map == NULL
|| type_class == 4)
{
_dl_dprintf (1, "%s %x %x -> %x %x ",
conflict ? "conflict" : "lookup",
(size_t) undef_map->mapaddr,
(size_t) (((ElfW(Addr)) ref) - undef_map->mapaddr),
(size_t) (value->tpnt ? value->tpnt->mapaddr : 0),
(size_t) (value->sym ? value->sym->st_value : 0));
if (conflict)
_dl_dprintf (1, "x %x %x ",
(size_t) (val.tpnt ? val.tpnt->mapaddr : 0),
(size_t) (val.sym ? val.sym->st_value : 0));
_dl_dprintf (1, "/%x %s\n", type_class, undef_name);
}
}
#endif
}
#else
#define _dl_debug_lookup(undef_name, undef_map, ref, value, type_class)
#endif
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