1 | /* Print kernel diagnostics data in ld.so. Linux version. |
2 | Copyright (C) 2021-2024 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, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <dl-diagnostics.h> |
20 | #include <ldsodefs.h> |
21 | #include <sys/utsname.h> |
22 | |
23 | /* Dump the auxiliary vector to standard output. */ |
24 | static void |
25 | print_auxv (void) |
26 | { |
27 | /* See _dl_show_auxv. The code below follows the general output |
28 | format for diagnostic dumps. */ |
29 | unsigned int index = 0; |
30 | for (ElfW(auxv_t) *av = GLRO(dl_auxv); av->a_type != AT_NULL; ++av) |
31 | { |
32 | _dl_printf (fmt: "auxv[0x%x].a_type=0x%lx\n" |
33 | "auxv[0x%x].a_val" , |
34 | index, (unsigned long int) av->a_type, index); |
35 | if (av->a_type == AT_EXECFN |
36 | || av->a_type == AT_PLATFORM |
37 | || av->a_type == AT_BASE_PLATFORM) |
38 | { |
39 | /* The address of the strings is not useful at all, so print |
40 | the strings themselves. */ |
41 | _dl_printf (fmt: "_string=" ); |
42 | _dl_diagnostics_print_string (s: (const char *) av->a_un.a_val); |
43 | } |
44 | else |
45 | _dl_printf (fmt: "=0x%lx" , (unsigned long int) av->a_un.a_val); |
46 | _dl_printf (fmt: "\n" ); |
47 | ++index; |
48 | } |
49 | } |
50 | |
51 | /* Print one uname entry. */ |
52 | static void |
53 | print_utsname_entry (const char *field, const char *value) |
54 | { |
55 | _dl_printf (fmt: "uname." ); |
56 | _dl_diagnostics_print_labeled_string (label: field, s: value); |
57 | } |
58 | |
59 | /* Print information from uname, including the kernel version. */ |
60 | static void |
61 | print_uname (void) |
62 | { |
63 | struct utsname uts; |
64 | if (__uname (&uts) == 0) |
65 | { |
66 | print_utsname_entry (field: "sysname" , value: uts.sysname); |
67 | print_utsname_entry (field: "nodename" , value: uts.nodename); |
68 | print_utsname_entry (field: "release" , value: uts.release); |
69 | print_utsname_entry (field: "version" , value: uts.version); |
70 | print_utsname_entry (field: "machine" , value: uts.machine); |
71 | print_utsname_entry (field: "domainname" , value: uts.domainname); |
72 | } |
73 | } |
74 | |
75 | void |
76 | _dl_diagnostics_kernel (void) |
77 | { |
78 | print_auxv (); |
79 | print_uname (); |
80 | } |
81 | |