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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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4f65df6a58
nolibc does not provide sys/time.h and sys/auxv.h, instead their definitions are available unconditionally. Guard the includes so they are not attempted on nolibc. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Acked-by: Shuah Khan <skhan@linuxfoundation.org> Link: https://lore.kernel.org/all/20250226-parse_vdso-nolibc-v2-15-28e14e031ed8@linutronix.de
59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* vdso_test_gettimeofday.c: Sample code to test parse_vdso.c and
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* vDSO gettimeofday()
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* Copyright (c) 2014 Andy Lutomirski
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*
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* Compile with:
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* gcc -std=gnu99 vdso_test_gettimeofday.c parse_vdso_gettimeofday.c
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*
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* Tested on x86, 32-bit and 64-bit. It may work on other architectures, too.
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*/
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#include <stdio.h>
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#ifndef NOLIBC
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#include <sys/auxv.h>
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#include <sys/time.h>
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#endif
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#include "../kselftest.h"
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#include "parse_vdso.h"
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#include "vdso_config.h"
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#include "vdso_call.h"
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int main(int argc, char **argv)
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{
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const char *version = versions[VDSO_VERSION];
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const char **name = (const char **)&names[VDSO_NAMES];
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unsigned long sysinfo_ehdr = getauxval(AT_SYSINFO_EHDR);
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if (!sysinfo_ehdr) {
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printf("AT_SYSINFO_EHDR is not present!\n");
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return KSFT_SKIP;
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}
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vdso_init_from_sysinfo_ehdr(getauxval(AT_SYSINFO_EHDR));
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/* Find gettimeofday. */
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typedef long (*gtod_t)(struct timeval *tv, struct timezone *tz);
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gtod_t gtod = (gtod_t)vdso_sym(version, name[0]);
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if (!gtod) {
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printf("Could not find %s\n", name[0]);
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return KSFT_SKIP;
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}
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struct timeval tv;
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long ret = VDSO_CALL(gtod, 2, &tv, 0);
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if (ret == 0) {
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printf("The time is %lld.%06lld\n",
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(long long)tv.tv_sec, (long long)tv.tv_usec);
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} else {
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printf("%s failed\n", name[0]);
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return KSFT_FAIL;
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}
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return 0;
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}
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