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>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* vdso_test_getcpu.c: Sample code to test parse_vdso.c and vDSO getcpu()
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*
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* Copyright (c) 2020 Arm Ltd
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*/
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#include <stdint.h>
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#include <elf.h>
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#include <stdio.h>
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#include <sys/auxv.h>
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#include <sys/time.h>
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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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struct getcpu_cache;
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typedef long (*getcpu_t)(unsigned int *, unsigned int *,
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struct getcpu_cache *);
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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;
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unsigned int cpu, node;
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getcpu_t get_cpu;
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long ret;
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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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get_cpu = (getcpu_t)vdso_sym(version, name[4]);
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if (!get_cpu) {
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printf("Could not find %s\n", name[4]);
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return KSFT_SKIP;
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}
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ret = VDSO_CALL(get_cpu, 3, &cpu, &node, 0);
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if (ret == 0) {
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printf("Running on CPU %u node %u\n", cpu, node);
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} else {
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printf("%s failed\n", name[4]);
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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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