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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/* Print contents of object file note.
Copyright (C) 2002, 2007, 2009, 2011, 2015, 2016 Red Hat, Inc.
This file is part of elfutils.
Written by Ulrich Drepper <drepper@redhat.com>, 2002.
This file is free software; you can redistribute it and/or modify
it under the terms of either
* the GNU Lesser General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at
your option) any later version
or
* the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at
your option) any later version
or both in parallel, as here.
elfutils 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
General Public License for more details.
You should have received copies of the GNU General Public License and
the GNU Lesser General Public License along with this program. If
not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libeblP.h>
void
ebl_object_note (Ebl *ebl, const char *name, uint32_t type,
uint32_t descsz, const char *desc)
{
if (! ebl->object_note (name, type, descsz, desc))
{
/* The machine specific function did not know this type. */
if (strcmp ("stapsdt", name) == 0)
{
if (type != 3)
{
printf (gettext ("unknown SDT version %u\n"), type);
return;
}
/* Descriptor starts with three addresses, pc, base ref and
semaphore. Then three zero terminated strings provider,
name and arguments. */
union
{
Elf64_Addr a64[3];
Elf32_Addr a32[3];
} addrs;
size_t addrs_size = gelf_fsize (ebl->elf, ELF_T_ADDR, 3, EV_CURRENT);
if (descsz < addrs_size + 3)
{
invalid_sdt:
printf (gettext ("invalid SDT probe descriptor\n"));
return;
}
Elf_Data src =
{
.d_type = ELF_T_ADDR, .d_version = EV_CURRENT,
.d_buf = (void *) desc, .d_size = addrs_size
};
Elf_Data dst =
{
.d_type = ELF_T_ADDR, .d_version = EV_CURRENT,
.d_buf = &addrs, .d_size = addrs_size
};
if (gelf_xlatetom (ebl->elf, &dst, &src,
elf_getident (ebl->elf, NULL)[EI_DATA]) == NULL)
{
printf ("%s\n", elf_errmsg (-1));
return;
}
const char *provider = desc + addrs_size;
const char *pname = memchr (provider, '\0', desc + descsz - provider);
if (pname == NULL)
goto invalid_sdt;
++pname;
const char *args = memchr (pname, '\0', desc + descsz - pname);
if (args == NULL ||
memchr (++args, '\0', desc + descsz - pname) != desc + descsz - 1)
goto invalid_sdt;
GElf_Addr pc;
GElf_Addr base;
GElf_Addr sem;
if (gelf_getclass (ebl->elf) == ELFCLASS32)
{
pc = addrs.a32[0];
base = addrs.a32[1];
sem = addrs.a32[2];
}
else
{
pc = addrs.a64[0];
base = addrs.a64[1];
sem = addrs.a64[2];
}
printf (gettext (" PC: "));
printf ("%#" PRIx64 ",", pc);
printf (gettext (" Base: "));
printf ("%#" PRIx64 ",", base);
printf (gettext (" Semaphore: "));
printf ("%#" PRIx64 "\n", sem);
printf (gettext (" Provider: "));
printf ("%s,", provider);
printf (gettext (" Name: "));
printf ("%s,", pname);
printf (gettext (" Args: "));
printf ("'%s'\n", args);
return;
}
switch (type)
{
case NT_GNU_BUILD_ID:
if (strcmp (name, "GNU") == 0 && descsz > 0)
{
printf (gettext (" Build ID: "));
uint_fast32_t i;
for (i = 0; i < descsz - 1; ++i)
printf ("%02" PRIx8, (uint8_t) desc[i]);
printf ("%02" PRIx8 "\n", (uint8_t) desc[i]);
}
break;
case NT_GNU_GOLD_VERSION:
if (strcmp (name, "GNU") == 0 && descsz > 0)
/* A non-null terminated version string. */
printf (gettext (" Linker version: %.*s\n"),
(int) descsz, desc);
break;
case NT_GNU_ABI_TAG:
if (strcmp (name, "GNU") == 0 && descsz >= 8 && descsz % 4 == 0)
{
Elf_Data in =
{
.d_version = EV_CURRENT,
.d_type = ELF_T_WORD,
.d_size = descsz,
.d_buf = (void *) desc
};
/* Normally NT_GNU_ABI_TAG is just 4 words (16 bytes). If it
is much (4*) larger dynamically allocate memory to convert. */
#define FIXED_TAG_BYTES 16
uint32_t sbuf[FIXED_TAG_BYTES];
uint32_t *buf;
if (unlikely (descsz / 4 > FIXED_TAG_BYTES))
{
buf = malloc (descsz);
if (unlikely (buf == NULL))
return;
}
else
buf = sbuf;
Elf_Data out =
{
.d_version = EV_CURRENT,
.d_type = ELF_T_WORD,
.d_size = descsz,
.d_buf = buf
};
if (elf32_xlatetom (&out, &in, ebl->data) != NULL)
{
const char *os;
switch (buf[0])
{
case ELF_NOTE_OS_LINUX:
os = "Linux";
break;
case ELF_NOTE_OS_GNU:
os = "GNU";
break;
case ELF_NOTE_OS_SOLARIS2:
os = "Solaris";
break;
case ELF_NOTE_OS_FREEBSD:
os = "FreeBSD";
break;
default:
os = "???";
break;
}
printf (gettext (" OS: %s, ABI: "), os);
for (size_t cnt = 1; cnt < descsz / 4; ++cnt)
{
if (cnt > 1)
putchar_unlocked ('.');
printf ("%" PRIu32, buf[cnt]);
}
putchar_unlocked ('\n');
}
if (descsz / 4 > FIXED_TAG_BYTES)
free (buf);
break;
}
FALLTHROUGH;
default:
/* Unknown type. */
break;
}
}
}
|
