1 /* cpu_info.c
2 * Routines to report CPU information
3 *
4 * Wireshark - Network traffic analyzer
5 * By Gerald Combs <gerald@wireshark.org>
6 * Copyright 1998 Gerald Combs
7 *
8 * SPDX-License-Identifier: GPL-2.0-or-later
9 */
10
11 #include "config.h"
12
13 #include <string.h>
14 #include <glib.h>
15
16 #include <wsutil/ws_cpuid.h>
17 #include <wsutil/cpu_info.h>
18
19 /*
20 * Get the CPU info, and append it to the GString
21 */
22 void
get_cpu_info(GString * str)23 get_cpu_info(GString *str)
24 {
25 guint32 CPUInfo[4];
26 char CPUBrandString[0x40];
27 unsigned nExIds;
28
29 /* https://docs.microsoft.com/en-us/cpp/intrinsics/cpuid-cpuidex */
30
31 /* Calling __cpuid with 0x80000000 as the InfoType argument */
32 /* gets the number of valid extended IDs. */
33 if (!ws_cpuid(CPUInfo, 0x80000000))
34 return;
35
36 nExIds = CPUInfo[0];
37
38 if (nExIds<0x80000005)
39 return;
40
41 memset(CPUBrandString, 0, sizeof(CPUBrandString));
42
43 /* Interpret CPU brand string */
44 ws_cpuid(CPUInfo, 0x80000002);
45 memcpy(CPUBrandString, CPUInfo, sizeof(CPUInfo));
46 ws_cpuid(CPUInfo, 0x80000003);
47 memcpy(CPUBrandString + 16, CPUInfo, sizeof(CPUInfo));
48 ws_cpuid(CPUInfo, 0x80000004);
49 memcpy(CPUBrandString + 32, CPUInfo, sizeof(CPUInfo));
50
51 if (str->len > 0)
52 g_string_append(str, ", with ");
53
54 g_string_append_printf(str, "%s", g_strstrip(CPUBrandString));
55
56 if (ws_cpuid_sse42())
57 g_string_append(str, " (with SSE4.2)");
58 }
59
60 /*
61 * Editor modelines - https://www.wireshark.org/tools/modelines.html
62 *
63 * Local variables:
64 * c-basic-offset: 4
65 * tab-width: 8
66 * indent-tabs-mode: nil
67 * End:
68 *
69 * vi: set shiftwidth=4 tabstop=8 expandtab:
70 * :indentSize=4:tabSize=8:noTabs=true:
71 */
72