1/* Print kernel diagnostics data in ld.so. Linux version.
2 Copyright (C) 2021 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. */
24static void
25print_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 ("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 /* The address of the strings is not useful at all, so print
39 the strings themselvs. */
40 _dl_diagnostics_print_string ((const char *) av->a_un.a_val);
41 else
42 _dl_printf ("0x%lx", (unsigned long int) av->a_un.a_val);
43 _dl_printf ("\n");
44 ++index;
45 }
46}
47
48/* Print one uname entry. */
49static void
50print_utsname_entry (const char *field, const char *value)
51{
52 _dl_printf ("uname.");
53 _dl_diagnostics_print_labeled_string (field, value);
54}
55
56/* Print information from uname, including the kernel version. */
57static void
58print_uname (void)
59{
60 struct utsname uts;
61 if (__uname (&uts) == 0)
62 {
63 print_utsname_entry ("sysname", uts.sysname);
64 print_utsname_entry ("nodename", uts.nodename);
65 print_utsname_entry ("release", uts.release);
66 print_utsname_entry ("version", uts.version);
67 print_utsname_entry ("machine", uts.machine);
68 print_utsname_entry ("domainname", uts.domainname);
69 }
70}
71
72void
73_dl_diagnostics_kernel (void)
74{
75 print_auxv ();
76 print_uname ();
77}
78