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selftests/vDSO: fix runtime errors on LoongArch 

It could not find __vdso_getcpu and __vdso_gettimeofday when test getcpu
and gettimeofday on LoongArch.

  # make headers && cd tools/testing/selftests/vDSO && make
  # ./vdso_test_getcpu
  Could not find __vdso_getcpu
  # ./vdso_test_gettimeofday
  Could not find __vdso_gettimeofday

One simple way is to add LoongArch case to define version and name, just
like commit d942f231af ("selftests/vDSO: Add riscv getcpu & gettimeofday
test"), but it is not the best way.

Since each architecture has already defined names and versions in
vdso_config.h, it is proper to include vdso_config.h to get version and
name for all archs.

Link: https://lkml.kernel.org/r/20240428030530.24399-3-yangtiezhu@loongson.cn
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Tested-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Tiezhu Yang 2024-04-28 11:05:30 +08:00 committed by Andrew Morton
parent dc8dc573aa
commit 48f044a784
2 changed files with 13 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
tools/testing/selftests/vDSO/vdso_test_getcpu.c
View File

@ -13,13 +13,7 @@
#include "../kselftest.h"
#include "parse_vdso.h"
#if defined(__riscv)
const char *version = "LINUX_4.15";
#else
const char *version = "LINUX_2.6";
#endif
const char *name = "__vdso_getcpu";
#include "vdso_config.h"
struct getcpu_cache;
typedef long (*getcpu_t)(unsigned int *, unsigned int *,
@ -27,6 +21,8 @@ typedef long (*getcpu_t)(unsigned int *, unsigned int *,
int main(int argc, char **argv)
{
const char *version = versions[VDSO_VERSION];
const char **name = (const char **)&names[VDSO_NAMES];
unsigned long sysinfo_ehdr;
unsigned int cpu, node;
getcpu_t get_cpu;
@ -40,9 +36,9 @@ int main(int argc, char **argv)
vdso_init_from_sysinfo_ehdr(getauxval(AT_SYSINFO_EHDR));
get_cpu = (getcpu_t)vdso_sym(version, name);
get_cpu = (getcpu_t)vdso_sym(version, name[4]);
if (!get_cpu) {
printf("Could not find %s\n", name);
printf("Could not find %s\n", name[4]);
return KSFT_SKIP;
}
@ -50,7 +46,7 @@ int main(int argc, char **argv)
if (ret == 0) {
printf("Running on CPU %u node %u\n", cpu, node);
} else {
printf("%s failed\n", name);
printf("%s failed\n", name[4]);
return KSFT_FAIL;
}

26
tools/testing/selftests/vDSO/vdso_test_gettimeofday.c
View File

@ -18,25 +18,13 @@
#include "../kselftest.h"
#include "parse_vdso.h"
/*
* ARM64's vDSO exports its gettimeofday() implementation with a different
* name and version from other architectures, so we need to handle it as
* a special case.
*/
#if defined(__aarch64__)
const char *version = "LINUX_2.6.39";
const char *name = "__kernel_gettimeofday";
#elif defined(__riscv)
const char *version = "LINUX_4.15";
const char *name = "__vdso_gettimeofday";
#else
const char *version = "LINUX_2.6";
const char *name = "__vdso_gettimeofday";
#endif
#include "vdso_config.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");
@ -47,10 +35,10 @@ int main(int argc, char **argv)
/* Find gettimeofday. */
typedef long (*gtod_t)(struct timeval *tv, struct timezone *tz);
gtod_t gtod = (gtod_t)vdso_sym(version, name);
gtod_t gtod = (gtod_t)vdso_sym(version, name[0]);
if (!gtod) {
printf("Could not find %s\n", name);
printf("Could not find %s\n", name[0]);
return KSFT_SKIP;
}
@ -61,7 +49,7 @@ int main(int argc, char **argv)
printf("The time is %lld.%06lld\n",
(long long)tv.tv_sec, (long long)tv.tv_usec);
} else {
printf("%s failed\n", name);
printf("%s failed\n", name[0]);
return KSFT_FAIL;
}