1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/* 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
unsigned long symbol_addr;
if (_dl_trace_prelink)
{
int conflict = 0;
struct symbol_ref val = { NULL, NULL };
if ((_dl_trace_prelink_map == NULL
|| _dl_trace_prelink_map == _dl_loaded_modules)
&& undef_map != _dl_loaded_modules)
{
symbol_addr = (unsigned long)
_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 (value->sym
&& (__builtin_expect (ELF_ST_TYPE(value->sym->st_info)
== STT_TLS, 0)))
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
|
