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// SPDX-License-Identifier: GPL-2.0-only
/*
* vdso_test_getcpu.c: Sample code to test parse_vdso.c and vDSO getcpu()
*
* Copyright (c) 2020 Arm Ltd
*/
#include <stdint.h>
#include <elf.h>
#include <stdio.h>
#include <sys/auxv.h>
#include <sys/time.h>
#include "../kselftest.h"
#include "parse_vdso.h"
const char *version = "LINUX_2.6";
const char *name = "__vdso_getcpu";
struct getcpu_cache;
typedef long (*getcpu_t)(unsigned int *, unsigned int *,
struct getcpu_cache *);
int main(int argc, char **argv)
{
unsigned long sysinfo_ehdr;
unsigned int cpu, node;
getcpu_t get_cpu;
long ret;
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));
get_cpu = (getcpu_t)vdso_sym(version, name);
if (!get_cpu) {
printf("Could not find %s\n", name);
return KSFT_SKIP;
}
ret = get_cpu(&cpu, &node, 0);
if (ret == 0) {
printf("Running on CPU %u node %u\n", cpu, node);
} else {
printf("%s failed\n", name);
return KSFT_FAIL;
}
return 0;
}
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