Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* vdso_test_gettimeofday.c: Sample code to test parse_vdso.c and
|
|
* vDSO gettimeofday()
|
|
* Copyright (c) 2014 Andy Lutomirski
|
|
*
|
|
* Compile with:
|
|
* gcc -std=gnu99 vdso_test_gettimeofday.c parse_vdso_gettimeofday.c
|
|
*
|
|
* Tested on x86, 32-bit and 64-bit. It may work on other architectures, too.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#ifndef NOLIBC
|
|
#include <sys/auxv.h>
|
|
#include <sys/time.h>
|
|
#endif
|
|
|
|
#include "kselftest.h"
|
|
#include "parse_vdso.h"
|
|
#include "vdso_config.h"
|
|
#include "vdso_call.h"
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
const char *version = versions[VDSO_VERSION];
|
|
const char **name = (const char **)&names[VDSO_NAMES];
|
|
|
|
unsigned long sysinfo_ehdr = getauxval(AT_SYSINFO_EHDR);
|
|
if (!sysinfo_ehdr) {
|
|
printf("AT_SYSINFO_EHDR is not present!\n");
|
|
return KSFT_SKIP;
|
|
}
|
|
|
|
vdso_init_from_sysinfo_ehdr(getauxval(AT_SYSINFO_EHDR));
|
|
|
|
/* Find gettimeofday. */
|
|
typedef long (*gtod_t)(struct timeval *tv, struct timezone *tz);
|
|
gtod_t gtod = (gtod_t)vdso_sym(version, name[0]);
|
|
|
|
if (!gtod) {
|
|
printf("Could not find %s\n", name[0]);
|
|
return KSFT_SKIP;
|
|
}
|
|
|
|
struct timeval tv;
|
|
long ret = VDSO_CALL(gtod, 2, &tv, 0);
|
|
|
|
if (ret == 0) {
|
|
printf("The time is %lld.%06lld\n",
|
|
(long long)tv.tv_sec, (long long)tv.tv_usec);
|
|
} else {
|
|
printf("%s failed\n", name[0]);
|
|
return KSFT_FAIL;
|
|
}
|
|
|
|
return 0;
|
|
}
|