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c701bcc6 | 1 | /* gettimeofday - set time. Linux version. |
dff8da6b | 2 | Copyright (C) 2020-2024 Free Software Foundation, Inc. |
c701bcc6 AZ |
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 License as | |
7 | published by the Free Software Foundation; either version 2.1 of the | |
8 | 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 | ||
01bd6251 AZ |
19 | #include <time.h> |
20 | #include <string.h> | |
21 | ||
c701bcc6 AZ |
22 | /* Optimize the function call by setting the PLT directly to vDSO symbol. */ |
23 | #ifdef USE_IFUNC_GETTIMEOFDAY | |
c701bcc6 AZ |
24 | # include <sysdep.h> |
25 | # include <sysdep-vdso.h> | |
26 | ||
27 | # ifdef SHARED | |
01bd6251 | 28 | # include <dl-vdso.h> |
1bdda52f | 29 | # include <libc-vdso.h> |
c701bcc6 AZ |
30 | |
31 | static int | |
32 | __gettimeofday_syscall (struct timeval *restrict tv, void *restrict tz) | |
33 | { | |
34 | if (__glibc_unlikely (tz != 0)) | |
35 | memset (tz, 0, sizeof *tz); | |
36 | return INLINE_SYSCALL_CALL (gettimeofday, tv, tz); | |
37 | } | |
38 | ||
39 | # undef INIT_ARCH | |
40 | # define INIT_ARCH() \ | |
1bdda52f | 41 | void *vdso_gettimeofday = dl_vdso_vsym (HAVE_GETTIMEOFDAY_VSYSCALL) |
c701bcc6 AZ |
42 | libc_ifunc (__gettimeofday, |
43 | vdso_gettimeofday ? VDSO_IFUNC_RET (vdso_gettimeofday) | |
44 | : (void *) __gettimeofday_syscall) | |
45 | ||
46 | # else | |
47 | int | |
48 | __gettimeofday (struct timeval *restrict tv, void *restrict tz) | |
49 | { | |
50 | if (__glibc_unlikely (tz != 0)) | |
51 | memset (tz, 0, sizeof *tz); | |
52 | ||
53 | return INLINE_VSYSCALL (gettimeofday, 2, tv, tz); | |
54 | } | |
55 | # endif | |
56 | weak_alias (__gettimeofday, gettimeofday) | |
57 | #else /* USE_IFUNC_GETTIMEOFDAY */ | |
7455b700 LM |
58 | /* Conversion of gettimeofday function to support 64 bit time on archs |
59 | with __WORDSIZE == 32 and __TIMESIZE == 32/64 */ | |
60 | #include <errno.h> | |
61 | ||
62 | int | |
63 | __gettimeofday64 (struct __timeval64 *restrict tv, void *restrict tz) | |
64 | { | |
65 | if (__glibc_unlikely (tz != 0)) | |
66 | memset (tz, 0, sizeof (struct timezone)); | |
67 | ||
68 | struct __timespec64 ts64; | |
69 | if (__clock_gettime64 (CLOCK_REALTIME, &ts64)) | |
70 | return -1; | |
71 | ||
72 | *tv = timespec64_to_timeval64 (ts64); | |
73 | return 0; | |
74 | } | |
75 | ||
76 | # if __TIMESIZE != 64 | |
77 | libc_hidden_def (__gettimeofday64) | |
78 | ||
79 | int | |
80 | __gettimeofday (struct timeval *restrict tv, void *restrict tz) | |
81 | { | |
82 | struct __timeval64 tv64; | |
83 | if (__gettimeofday64 (&tv64, tz)) | |
84 | return -1; | |
85 | ||
86 | if (! in_time_t_range (tv64.tv_sec)) | |
87 | { | |
88 | __set_errno (EOVERFLOW); | |
89 | return -1; | |
90 | } | |
91 | ||
92 | *tv = valid_timeval64_to_timeval (tv64); | |
93 | return 0; | |
94 | } | |
95 | # endif | |
96 | weak_alias (__gettimeofday, gettimeofday) | |
c701bcc6 | 97 | #endif |