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Revision af9cc93c0dee5fc1f9fa32cd9d79a456738a21be authored by Takashi Iwai on 27 April 2016, 15:30:49 UTC, committed by Takashi Iwai on 27 April 2016, 15:30:49 UTC 
Merge tag 'asoc-fix-v4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
 
ASoC: Fixes for v4.6

This is a fairly large collection of fixes but almost all driver
specific ones, especially to the new Intel drivers which have had a lot
of recent development.  The one core fix is a change to the debugfs code
to avoid crashes in some relatively unusual configurations.
2 parent s bb03ed2 + 8c0f551
Raw File
vdso_test.c 
/*
 * vdso_test.c: Sample code to test parse_vdso.c
 * Copyright (c) 2014 Andy Lutomirski
 * Subject to the GNU General Public License, version 2
 *
 * Compile with:
 * gcc -std=gnu99 vdso_test.c parse_vdso.c
 *
 * Tested on x86, 32-bit and 64-bit.  It may work on other architectures, too.
 */

#include <stdint.h>
#include <elf.h>
#include <stdio.h>
#include <sys/auxv.h>
#include <sys/time.h>

extern void *vdso_sym(const char *version, const char *name);
extern void vdso_init_from_sysinfo_ehdr(uintptr_t base);
extern void vdso_init_from_auxv(void *auxv);

int main(int argc, char **argv)
{
	unsigned long sysinfo_ehdr = getauxval(AT_SYSINFO_EHDR);
	if (!sysinfo_ehdr) {
		printf("AT_SYSINFO_EHDR is not present!\n");
		return 0;
	}

	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("LINUX_2.6", "__vdso_gettimeofday");

	if (!gtod) {
		printf("Could not find __vdso_gettimeofday\n");
		return 1;
	}

	struct timeval tv;
	long ret = gtod(&tv, 0);

	if (ret == 0) {
		printf("The time is %lld.%06lld\n",
		       (long long)tv.tv_sec, (long long)tv.tv_usec);
	} else {
		printf("__vdso_gettimeofday failed\n");
	}

	return 0;
}
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